High and low temperature lithium batteryIt is a special battery specially developed for the inherent temperature defects of the performance of chemical power supply, using innovative design concepts, using advanced formula systems and materials, rigorous process manufacturing processes and methods, overcoming multiple technical bottlenecks, and developing a series of high and low temperature lithium battery products, operating temperature range: -40 75.
Special high and low temperature lithium battery pack customization case".
As the temperature of the earth is getting higher and higher, our technical requirements are getting higher and higher, especially the application of lithium batteries in some special high-temperature environments or summer vehicle products, which will be a test of lithium battery materials and design.
As the application scenarios of lithium batteries become more and more diversified, waterproof, explosion-proof, high temperature, low temperature, space and other requirements, lithium battery experts are also actively experimenting and making breakthroughs.
The common problems are: the battery bulges and swells, the battery life is seriously attenuated, and the battery has no voltage
The above problems are mainly manifested in the following points:
1. The user did not explain the use scenario to the manufacturer, and only provided the conventional voltage capacity requirements, but did not provide the temperature requirements, current requirements and other special requirements, resulting in the battery design performance not reaching the actual required performance
2. The battery manufacturer does not have the production capacity of high-temperature batteries, the cathode active material of the battery needs to use the cathode material of high-temperature lithium cobalt oxide, the electrolyte of the battery needs to use the high-temperature electrolyte, the battery separator needs to use the high-temperature resistant ceramic separator, and the production process and formula need to be summarized through a large number of experiments
Test standard: The battery is fully charged and placed in the incubator, the temperature is debugged to 80, and the temperature in the box reaches 80, and the battery is placed in the incubator for 4 hours, starting 0The 2C current starts to discharge, and when the battery is discharged, the battery has no obvious flatulenceAfter cooling, the battery is fully charged, discharged, the discharge capacity and time of the battery are not significantly reduced, and the appearance is not damaged, which proves that the high-temperature performance of the battery is qualified.
Low-temperature lithium battery refers to: in the case of -30 -40 can also be effectively discharged, that is, the lithium ions on the negative electrode mentioned above can also run to the positive electrode, generally the lithium batteries we see on the market can not be -30 -40 discharge, the normal is -20 can also be discharged with a small current, that is, the standard discharge 02c discharge, if 1000mAh battery 0The 2C standard discharge is 200mA discharge, and the conventional battery can only reach 65% 70% of the energy at -20 discharge, which is due to the increase in the internal resistance of the battery when it is too low, and the electrolyte is frozen, so there are the following common problems:
1. The internal resistance of the battery will be relatively large at low temperature
2. The capacity of the battery is relatively low at low temperature
3. The battery can only be discharged with standard current at low temperature
4. The voltage platform of the battery will be relatively low when it is low temperature
The above problems are problems that will be encountered by batteries at room temperature, so friends who need low-temperature lithium batteries also have to pay attention to a problem, the so-called low-temperature work (-20 -30 -40) refers to the time of discharge, when charging, it is not possible to charge below 0, because the charging positive electrode under 0 will produce sharp crystals that will puncture the separator and cause a short circuit, the specific reference is as follows:
Charging temperature: 0 60
Conventional discharge temperature: -20 65 ;
Low temperature discharge temperature: -40 65 ;
The operating current does not exceed 2C of the capacity;
High and low temperature resistant lithium battery application field
Low-temperature lithium batteries, lithium batteries, high-temperature batteries, intelligent robot batteries, automatic pallet vehicle batteries, batteries for medical equipment, mobile power supplies, special batteries for instrumentation, battery charging systems, protection systems and special power supplies, lithium batteries for mining, various instruments, meters, small valve-controlled sealed lithium batteries, energy storage lithium batteries for photovoltaics, solar energy, wind energy, lithium batteries for electric road vehicles for various handling vehicles, lithium batteries for railway diesel locomotives, railway passenger cars, etc.
On-board equipment, equipment, exploration instruments, medical equipment, instrumentation, communication equipment, security equipment, etc.
Various lithium batteries can be customized according to customer requirements, shape, size, and capacity can be customized.