Lithium-cell protector and its protection
A protection device and lithium battery technology, which is applied in the repair/maintenance of secondary batteries, secondary batteries, battery pack components, etc. It can solve problems such as complex wiring, complex circuit design of protection IC101, and difficulty in making lithium battery protection circuits.
Inactive Publication Date: 2007-11-21
AMITA TECH
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Problems solved by technology
And at present, the protection IC 101 that manufacturers can provide is only up to four lithium batteries 102 connected in series, and as long as there are more lithium batteries 102, the circuit design of the protection IC 101 is more complicated, and the complexity of its circuit and unresolved battery There may be an unbalanced problem due to uneven aging and decay, so it is very difficult to manufacture more than five lithium battery protection circuits in series
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[0028] About technical content of the present invention and detailed description, now refer to accompanying drawing and explain as follows:
[0029] Fig. 2 and Fig. 3 are respectively the circuit of the parallel module of the lithium battery protection device of the present invention, and the circuit schematic diagram of the parallel connection of the lithium battery protection device and the battery. In the present invention, the protection device 1 includes an abnormality detection circuit 2 and an optical coupling circuit 3 .
[0030] The abnormal detection circuit 2 checks the voltage of the rechargeable battery 4 and outputs a detection signal to the optical coupling circuit 3 .
[0031] The optical coupling circuit 3 adjusts the impedance of the optical coupling circuit 3 according to the detection signal to disconnect the protection device 1 from the external circuit or to discharge or charge the rechargeable battery 4 .
[0032] Wherein, the optical coupling circuit 3...
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This is a protection device for lithium cell and its process method. The device is used to control charge-in or discharge of outside circuit to the cell. The device includes an abnormal checking circuit, optical coupling circuit, balance circuit and identification circuit. The checking circuit is to check the voltage of the lithium cell and output a checking signal. In case of normal signal, keeping charge or discharge; in case of abnormal signal, break charge or discharge. The balance circuit is to checking whether the cell is over charged. In case of overcharged, it discharge the cell. The optical coupling circuit adjusts its impedance according to the signal from the checking circuit so to cut off the linkage between the cell and outside circuit. The identification circuit is to determine the cell position.
Description
technical field [0001] The invention relates to a protection device for a series battery pack and a method thereof, in particular to a protection device for a lithium battery and a method thereof. Background technique, [0002] Rechargeable batteries are divided into nickel-cadmium (Ni-Cd) and nickel-metal hydride (Ni-MH). Nickel-cadmium batteries are the products of the previous generation, which are now rare in the market. Short, and cadmium is a heavy metal that is easy to cause environmental pollution. Ni-MH batteries are developed for the shortcomings of nickel-cadmium batteries, reducing the memory effect of nickel-cadmium batteries, and the capacity is much higher. Discharge, increase the cycle life, and the charging time is relatively short. The most important thing is that no toxic heavy metals are used, and the environmental pollution problem is greatly reduced. Of course, the Ni-MH battery is not perfect, and its environmental adaptability is poor, and it is almo...
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IPC IPC(8): H01M2/34H01M10/44H01M10/48H01M50/574
CPCY02E60/10
Inventor 程敬义吴伟臣陈建烨侯锦桦
Owner AMITA TECH