Partial characteristic test of single-cell lithium battery protection board

With the progress of society, the existence of electricity is inseparable everywhere, and rechargeable batteries are required for charging. As the core part of the lithium battery, the lithium battery protection board plays a key role in the battery, so the lithium battery People are paying more and more attention to the existence of protection boards. Lithium battery protection boards, as the name suggests, are the protection of batteries. Specifically, they have major protection functions such as overcharge, overcurrent, and overdischarge. It is imminent to master the common sense of lithium battery protection board. Today, the Chinese Chuangfa will take a look at the specific knowledge of some characteristics test of single-cell lithium battery protection board with everyone.

1. Single-cell battery overcharge protection test (COV),

A. Lower limit of protection: test whether the protection board is protected in advance, which affects the battery capacity value;

B. Protection upper limit: test whether the protection board is protected and affect the safety of the battery;

C. The upper and lower limits of the protection delay time: whether the protection delay time is within the design range;

D. Recovery test: Whether the battery can be recovered after protection is related to whether the battery can be used again.

2. Single battery over-discharge protection test (CUV);

A. The upper and lower limits of the protection value: one is whether the battery can be put to the lowest value and whether the capacity is complete Release, one must be protected, otherwise it will affect the life of the battery;

B. Protection delay time: Is the protection delay time within the design range?

C. Recovery value, recovery time ：Whether it can be restored after protection depends on whether the battery can be used again.

Three, PACK battery overvoltage protection test (POV) protection value, protection delay time, recovery value, recovery time (if COV is measured, POV does not need to be tested, generally it is not recommended to only test POV, because the total Even if the group’s POV is protected, it does not mean that every section can be protected. If a section is not protected, it is very dangerous.)

Four. PACK battery low voltage protection test (PUV ); protection value, protection delay time, recovery value, recovery time; the principle is the same as CUV, CUV has CUV measurement, but PUV may not be measured, and the reason is the same as POV;

5. Charge overcurrent protection (OCCHG); < /p>

A, the upper and lower limits of the protection value: the current is too small, it is related to the charging time, the current is too large, it is related to the battery life;

B, the protection delay time: the battery is hot enough to burn the protection board Questions;

C, recovery value, recovery time: reuse of the battery;

6, discharge overcurrent protection (OCDSG);

A, protection value Upper and lower limits: It seems that the best is the most important. The lower limit cannot be protected in advance, otherwise it will affect the power, the car will not run fast, the power tool will not turn, etc. The upper limit must be protected, and the non-protection will lead to problems such as motor burning and battery heating;

B. The upper and lower limits of the protection delay time: this is also more important. The lower limit is not protected. If it is protected in advance, the power tool will not be tightened; if the upper limit is not protected, it may cause problems such as motor burning and battery heating;

C. Recovery value, recovery time: Affect battery reuse;

7. Stall current test; protection value, protection delay time, recovery value, recovery time (power tools should be very important )

8. Short circuit protection test --- (Short circuit protection), generally more difficult to test, it will damage the protection device

9. Charging over-temperature protection test and recovery test;< /p>

X. Discharge over-temperature protection test recovery test;

11. Charge over-temperature protection test recovery test;

12. Discharge over-temperature protection test recovery Test;