Controllable self-repairing system and method of lithium battery

A lithium battery, self-healing technology, applied in the field of lithium battery systems, can solve the problems of bulging, unbalanced voltage, immature active balance, etc., and achieves the effect of low cost and solving the balance problem

Inactive Publication Date: 2020-06-02
BST POWER SHENZHEN
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Problems solved by technology

[0002] The advantages of lithium-ion batteries are high energy density, light weight, and long service life, but it also has many disadvantages. Lithium-ion batteries need to use a management system to manage the work of the battery, otherwise overcharging and over-discharging will occur. It leads to negative electrochemical reactions inside the battery, and produces a large amount of flammable and explosive gases, causing bulges and irreversible losses. In addition to overcharging and overdischarging, the most important thing is the battery balance problem.
[0003] Balance means that the capacity, voltage, and internal resistance of each single battery in the battery pack must always be kept the same. Only in this way can the battery pack exert its maximum capacity when charging and discharging, and the lithium battery will show capacity after a period of use. In the case of unbalanced and unbalanced voltage, even if the capacity of each single battery is accurately divided during assembly, the problem of uneven capacity of each single battery will st

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  • Controllable self-repairing system and method of lithium battery

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Embodiment Construction

[0012] The present invention will be further described below in conjunction with the description of the drawings and specific embodiments.

[0013] A controllable self-repair method for lithium batteries. When the use time of the lithium battery pack reaches the set time, each string of single lithium batteries at the lithium battery level is individually discharged, and the charged state of all single lithium batteries is restored. Pull back to the same zero battery state.

[0014] Such as figure 1 As shown, a controllable self-repair system of a lithium battery includes a battery management system (BMS) 1 and several independent maintenance modules that operate independently, and the maintenance modules include a single control chip (IC) 2, a single cell Lithium battery 3, MOS tube 4, power resistor 5, the input terminal of the battery management system 1 is connected to an external signal, the output terminal of the battery management system 1 is connected to the input ter...

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Abstract

The invention provides a controllable self-repairing method of a lithium battery, which comprises the steps of when the maintenance condition of a lithium battery pack is met, independently discharging each string of single lithium batteries of the lithium battery pack, and pulling back the charged state of all the single lithium batteries to the same zero-charged state again. The invention further provides a controllable self-repairing system of the lithium battery. The system and method have the beneficial effects that the battery equalization problem can be better solved, and the cost is low.

Description

technical field [0001] The invention relates to a lithium battery system, in particular to a controllable self-repair system and method for a lithium battery. Background technique [0002] The advantages of lithium-ion batteries are high energy density, light weight, and long service life, but it also has many disadvantages. Lithium-ion batteries need to use a management system to manage the work of the battery, otherwise overcharging and over-discharging will occur. It leads to negative electrochemical reactions inside the battery, and produces a large amount of flammable and explosive gases, causing bulges and irreversible losses. In addition to overcharging and overdischarging, the most important thing is battery balancing. [0003] Balance means that the capacity, voltage, and internal resistance of each single battery in the battery pack must always be kept the same. Only in this way can the battery pack exert its maximum capacity when charging and discharging, and the ...

Claims

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Application Information

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IPC IPC(8): H01M10/42H01M10/44H02J7/00
CPCH01M10/4207H01M10/425H01M10/441H01M2010/4271H02J7/0016Y02E60/10
Inventor 奉军军梁晓秋黄文海陈建华
Owner BST POWER SHENZHEN
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