Before replacing the battery, check whether it is truly dead. If your battery is cracked, there is no need to hesitate — replace it right away. If not, inspect the battery terminals before making a decision. The two terminals of the battery are the positive and negative poles connected to the alternator via wires. Sulfate buildup sometimes corrodes the battery terminals. Tap the terminals gently with a hammer to knock off the corrosive deposits. If this does not work, use a brush dipped in a mixture of baking soda and water to scrub them clean. Your battery may then be reusable again. Weather conditions can also affect your battery. Remove the vent caps and check if the internal fluid has frozen. If it has, you will need warmer weather for the battery to function properly.
If you’ve confirmed that you truly need a new battery, get ready to remove the old one. Turn off the vehicle engine, then scrub the top of the old battery with the baking soda solution we mentioned earlier. Use a wrench to carefully loosen the bolt securing the negative terminal, and detach the cable clamp from the terminal. Do the same for the positive terminal afterward. Next, grip the battery firmly and lift it out of your car. Once the battery is removed, take a moment to clean the cable clamps and battery tray with the baking soda mixture as recommended. If they cannot be thoroughly cleaned, it is advised to replace them.
Carefully place your new battery onto the battery tray. Make sure the positive and negative terminals are positioned correctly, then fasten the bracket to secure the battery. Attach the cable clamp to the positive terminal, followed by the negative one. Finally, close the hood and start your car!
This step requires special emphasis. Old car batteries are highly toxic and must be disposed of properly. You may take them to auto repair shops or car dealerships. However, professionals recommend delivering them to a recycling center, where staff will check if the components can be reused.
Lighter dead weight allows larger cargo load and higher profits.
A battery consists of the casing, electrode plate assembly (positive plates + negative plates), separators, electrolyte, busbars, terminal posts, connecting straps, battery top cover, safety valves and sealing components.
CCA stands for Cold Cranking Amps. It refers to the instantaneous current output a battery can deliver at -18°C to crank and start the engine.
1. No battery leakage issues. There is no liquid electrolyte inside the battery; colloidal solid electrolyte is adopted instead.
2.Ultra-thin design available: A 3.6V 400mAh cell can be as thin as 0.5mm.
3.Customizable shapes to meet diverse design requirements.
4.Flexible bendable structure: Polymer batteries can be bent up to approximately 90 degrees.
5. It can achieve high voltage in a single cell. Batteries with liquid electrolyte can only reach high voltage by connecting several cells in series, while polymer batteries contain no liquid inside.
6. Multi-layer structures can be built within a single cell to achieve high voltage.
7. Its capacity is twice that of lithium-ion batteries of the same size.
Self-discharge, also known as charge retention capability, refers to a battery’s ability to retain stored electricity under specific environmental conditions in an open-circuit state. Generally, self-discharge is mainly affected by manufacturing processes, materials and storage conditions, and it serves as one of the key parameters for evaluating battery performance.
In general, the lower the storage temperature of the battery, the lower its self-discharge rate. However, excessively low or high temperatures may damage the battery and render it unusable. The recommended storage temperature range for standard BYD batteries is -20°C to 45°C. A certain degree of self-discharge is normal after a fully charged battery is left standing in open-circuit condition for a period of time.
According to IEC standards, for nickel-cadmium and nickel-metal hydride batteries, after being fully charged and stored in an open-circuit state for 28 days at 20°C and 65% humidity, their discharge duration at 0.2C must exceed 3 hours and 3 hours and 15 minutes respectively to meet the standard requirements.
Compared with other rechargeable battery systems, solar cells with liquid electrolyte have a significantly lower self-discharge rate, approximately 10% per month at 25°C.
Battery internal resistance refers to the resistance encountered by current flowing inside the battery during operation. It is generally divided into AC internal resistance and DC internal resistance. Rechargeable batteries feature very low internal resistance. When measuring DC internal resistance, electrode capacity polarization will generate polarization resistance, making it impossible to obtain the true internal resistance value. In contrast, measuring AC internal resistance can eliminate the interference of polarization resistance and acquire the authentic internal resistance value.
AC internal resistance test principle: A battery can be regarded as an active resistance. Inject 1000 Hz, 50 mA constant current into the battery, then conduct voltage sampling, rectification, filtering and other processing to precisely measure internal resistance.
Battery internal pressure is formed by gas generated during charging and discharging. It is mainly affected by factors in service such as battery materials, manufacturing processes and structures. Normally, the internal pressure of a battery stays within a normal range, but it may rise under overcharge or over-discharge conditions.
If the rate of recombination reaction is lower than that of decomposition reaction, the generated gas cannot be consumed in time, resulting in a rise in battery internal pressure.
Lithium battery internal pressure test (per UL Standards)
Simulate the battery environment at an altitude of 15,240 m with low air pressure of 11.6 kPa to check whether the battery leaks electrolyte or bulges.
Procedures: Charge the battery at 1C constant current and constant voltage to 4.2 V with a cut-off current of 10 mA. Then place it in a low-pressure chamber under air pressure of 11.6 kPa and temperature of (20±3) °C for 6 hours. The battery shall not explode, catch fire, rupture or leak electrolyte.
Among all environmental factors, temperature exerts the greatest impact on the charge and discharge performance of batteries. The electrochemical reactions occurring at the electrode-electrolyte interface, which can be regarded as the core of a battery, are closely related to ambient temperature. As temperature drops, the reaction rate of electrodes decreases. Given a constant battery voltage, the discharge current will reduce, and the power output of the battery will decline accordingly. Conversely, a temperature rise boosts the battery’s output power. Temperature also affects the transport rate of electrolyte: higher temperatures accelerate electrolyte transmission while lower temperatures slow it down, both of which alter the battery’s charge-discharge performance. Nevertheless, excessively high temperatures above 45°C will disrupt the internal chemical equilibrium of the battery and trigger side reactions.
To prevent battery overcharging, it is necessary to control the charging termination point. When the battery is fully charged, specific characteristic signals can be used to judge whether charging has reached the end point. Generally, there are six methods as follows to avoid battery overcharging:
1. Peak Voltage Control: Judge the charging termination point by detecting the peak voltage of the battery.
2. dT/dt Control: Determine the charging termination point by detecting the peak temperature change rate of the battery.
3. T Control: The temperature difference between the fully charged battery and the ambient temperature will reach its maximum value.
4. -ΔV Control: After the battery reaches a peak voltage when fully charged, the voltage will drop by a certain value.
5. Timer Control: Control the charging termination by setting a fixed charging duration. Normally, the time required to charge 130% of the rated capacity is adopted as the control threshold.
6.TCO Control: For safety and performance of batteries, high-temperature charging shall be avoided (except high-temperature resistant batteries). Therefore, charging shall stop once the battery temperature rises to 60°C.
Overcharging refers to the behavior of continuing to charge a battery after it has been fully charged through a certain charging process.
During design, the negative electrode capacity is higher than the positive electrode capacity. As a result, the gas generated from the positive electrode passes through the separator and recombines with cadmium produced on the negative electrode. Under normal circumstances, the internal pressure of the battery will not rise significantly.
However, if the charging current is too high or the charging duration is excessively long, the generated oxygen cannot be consumed in a timely manner. This may lead to adverse phenomena such as increased internal pressure, battery deformation and electrolyte leakage. Meanwhile, the electrical performance of the battery will also decrease remarkably.
Over-discharging occurs when a battery continues to discharge after exhausting its stored electricity and its voltage drops to a specific value. The discharge cut-off voltage is normally determined based on the discharge current. For discharge rates of 0.2C to 2C, the cut-off voltage is generally set to 1.0V per cell; for discharge rates above 3C such as 5C or 10C, it is set to 0.8V per cell. Over-discharging may cause catastrophic damage to batteries, especially under high-current over-discharge or repeated over-discharge cycles. In general, over-discharging raises the internal pressure of the battery and impairs the reversibility of active materials on both positive and negative electrodes. Only partial performance recovery can be achieved even after recharging, accompanied by obvious capacity attenuation.
If batteries of different capacities or new and old batteries are mixed for combined use, issues such as electrolyte leakage and zero voltage may occur. During charging, the capacity discrepancy causes some batteries to be overcharged while others remain undercharged. During discharging, batteries with larger residual capacity still hold power, whereas low-capacity ones suffer over-discharge. This vicious cycle damages the batteries, resulting in electrolyte leakage or zero/low voltage.
An explosion is defined as the instantaneous ejection of any solid substance inside the battery to a distance of more than 25 cm away from the battery. The following test criteria are used to determine whether a battery explodes: Cover the test battery with a mesh enclosure, place the battery at the center with a 25 cm clearance from every side of the mesh. The mesh has a wire density of 6–7 wires per centimeter, and each wire is made of soft aluminum with a diameter of 0.25 mm. If no solid fragments penetrate the mesh during the test, the battery is deemed free of explosion.
As the commercial vehicle industry continues to advance toward lightweight and energy-saving development, lithium starting batteries are gradually replacing traditional lead-acid batteries and becoming a key upgrade option for an increasing number of vehicles. So why exactly do lithium starting batteries help cut fuel consumption? What tangible benefits can they bring to vehicle operation?
Data shows that lithium starting batteries boast distinct advantages over conventional batteries in terms of weight, charge-discharge efficiency and voltage stability.
Traditional lead-acid batteries are quite heavy, while lithium starting batteries can reduce the overall vehicle weight by approximately 80 kilograms. A lighter vehicle significantly lessens the engine load. Fuel consumption can be effectively lowered, especially during frequent starting, acceleration and long-distance transportation.
For commercial transport vehicles, lightweight design has become an industry trend:
Meanwhile, against the backdrop of increasingly strict overload control regulations, reducing vehicle weight also translates to greater compliance advantages. According to relevant data, China's transportation industry is continuously advancing standardized vehicle management and lightweight development.
Lithium starting batteries feature superior charge-discharge efficiency and support fast high-current charging, capable of being fully charged within one hour.
Compared with conventional batteries:
This means the engine does not need to operate under heavy load for a long time to power the battery, thus further cutting fuel consumption.
Lithium starting batteries feature a higher and more stable voltage platform. Data indicates their operating voltage can reach 26.4V (8 cells in series).
Stable voltage output delivers the following benefits:
Simply put, the vehicle runs with less energy strain, which naturally translates to lower fuel consumption.
The fuel-saving effect is more remarkable for high-mileage commercial vehicles.
Statistics show:
This represents a substantial long-term profit for logistics fleets and long-distance transportation businesses.
Lithium starting batteries offer far more advantages than merely cutting fuel consumption:
Lithium batteries have a service life of 5 to 8 years, vastly outperforming traditional lead-acid batteries.
Data records its gravimetric energy density at 120 Wh/kg.
Manufactured with environmentally friendly materials, they support energy conservation and emission reduction, aligning with the development trend of new energy and green transportation.
The lighter vehicle weight and more efficient electric power management further boost the comprehensive driving range of vehicles.
Despite the outstanding merits of lithium starting batteries, one practical disadvantage remains:
Documents confirm that the upfront procurement cost of lithium starting batteries currently exceeds that of conventional batteries.
Nevertheless, when evaluated from a long-term usage perspective, their outstanding overall economic value stands out thanks to lower fuel expenditure, extended service life and minimal maintenance costs.
In recent years, the number of motor vehicles in possession has kept rising, making vehicle safety a constant public concern. As a core component of the vehicle starting system, the safety performance of starting batteries directly determines the reliability and operational safety of the whole vehicle. Nevertheless, fires and even explosions triggered by starting batteries still occur frequently due to battery aging, improper operation or extreme operating environments. With the continuous improvement of national relevant standards, the safety performance of automotive starting batteries is embracing a new round of upgrading.
Located in the harsh engine compartment environment, starting batteries are exposed to long-term high temperature, continuous vibration and alternating electrical loads. Safety accidents will occur once internal or external abnormal conditions emerge.
Traditional lead-acid batteries generate hydrogen and oxygen during charging. Blocked exhaust passages will hinder timely gas discharge, and the mixed gas is prone to explosion once exposed to ignition sources. In addition, the shedding of electrode active substances will cause internal short circuits, leading to a sharp rise in local temperature.
Mismatch between alternators and batteries, wiring aging or insulation damage that causes short circuits are major triggers for battery fires. Positive pole short circuit of batteries has been found in many vehicle spontaneous combustion cases.
Prolonged exposure to blazing sun accelerates the aging and deformation of battery shells. Failure to charge the battery timely after excessive discharge in frigid environments may cause electrolyte freezing and expansion. Frequent consecutive engine cranking will rapidly raise battery temperature and produce massive gas.
Some early lithium battery solutions feature insufficient stability under high temperature and vibration conditions. Sustained accumulation of internal stress may result in battery bulging and even thermal runaway.
To further improve the safety level of starting batteries, China is accelerating the construction of supporting standard systems. The newly-formulated Accumulators and Battery Assemblies — Test Methods for Verifying Device Performance of Reducing Explosion Hazards for Starting Lead-acid Batteries adopts the international IEC standard system, realizing unified detection and evaluation of hydrogen and oxygen released during battery charging and discharging. Standardized testing methods help verify the explosion-proof performance at the product design stage, and cut down safety risks from the source.
As the industry raises higher requirements for battery safety performance, advanced new material technology brings innovative solutions for starting batteries. Compared with traditional lead-acid batteries, sodium-lithium starting batteries have prominent advantages in multiple dimensions:
It delivers higher instantaneous starting current, and maintains stable engine cranking performance under low-temperature and low-state-of-charge conditions.
Equipped with an advanced Battery Management System (BMS), it monitors cell conditions in real time, and effectively prevents overcharging, overdischarging, short circuit, overheating and other abnormal risks.
Applicable to passenger cars, SUVs, commercial vehicles, trucks, engineering machinery and other scenarios, it meets the starting demands of diversified vehicles.
From the explosion-proof design of traditional lead-acid batteries, the improvement of national standard systems, to the iteration of innovative sodium-lithium technology, the automotive starting battery industry is advancing toward higher safety and reliability. In the future, driven by technological upgrading and standardized regulation, the safety performance of starting batteries will be further optimized, bringing safer vehicle-using experience for end users.
Dead batteries that fail to start vehicles are a common headache for many car owners. A suitable emergency jump starter can not only resolve sudden breakdowns but also offer extra security for daily trips. Currently, emergency jump starters on the market fall into three main categories: lead-acid, lithium-ion, and the emerging sodium-lithium types.
Lead-acid jump starters feature mature technology and relatively low prices, and some models come with additional functions such as air compressors. However, they have obvious drawbacks:
Lightweight and capable of strong discharge output, lithium-ion jump starters dominate the current market.
Their major advantages include:
Nevertheless, low-quality lithium-ion units still carry safety risks under high temperatures or physical impact.
Sodium-lithium technology combines the strengths of sodium-ion and lithium-ion batteries, delivering superior performance in safety, low-temperature resistance and cycle life.
Sodium-lithium cells boast excellent chemical stability. Paired with an intelligent BMS (Battery Management System), they effectively prevent:
Thereby eliminating potential safety hazards.
Conventional batteries suffer drastic performance drops in cold regions. Sodium-lithium jump starters retain high capacity output at low temperatures and supply sufficient cranking current for vehicles.
Both ordinary gasoline sedans and large diesel vehicles require ample instantaneous cranking current. Their high-rate discharge capability adapts them to more complex usage scenarios.
Compared with lead-acid batteries, sodium-lithium batteries have longer cycle life and a lower self-discharge rate, translating to reduced maintenance costs and fewer replacements over long-term use.
Vehicles with different displacements have varying cranking current requirements:
Opt for models equipped with multiple safety protections, including:
products equipped with multiple such safety functions
Drivers in cold northern regions should prioritize low-temperature cranking capacity, while those in hot areas shall focus on heat dissipation and battery safety management systems.
Modern jump starters commonly integrate handy features:
And other practical functions
Do not only focus on upfront price. Take the following factors into account:
Develop good operating habits to extend equipment lifespan:
Purchasing an emergency jump starter is essentially adding an extra layer of safety to your journeys. Lithium-ion jump starters can meet daily demands for regular sedan owners. For users in frigid climates, owners of large-displacement SUVs, diesel trucks and construction machinery, the new-generation sodium-lithium jump starters with enhanced low-temperature performance and safety are highly recommended. A well-matched unit, proper operation and regular maintenance ensure your jump starter performs reliably when emergencies strike.
