Charge-discharge automatically equalized lithium-ion power battery series battery pack

A technology of connecting battery packs and power batteries in series, which is applied in the direction of secondary battery charging/discharging, secondary battery, secondary battery repair/maintenance, etc. The problem of the consistency of the battery capacity and the unsatisfactory solution are not enough to achieve the effect of high cost performance, simple structure and cost reduction

Active Publication Date: 2012-03-14
周金平
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The balance control conventionally adopted above cannot solve the problem of the consistency of the capacity of each single battery in the lithium-ion power battery series battery pack, but only solves the problem of the consistency of the state of charge of each single battery, and the solution is not ideal. There are many defects mentioned above
Therefore, it is impossible to achieve the ideal state of consistency between the individual cells in the lithium-ion power battery series battery pack.

Method used

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  • Charge-discharge automatically equalized lithium-ion power battery series battery pack
  • Charge-discharge automatically equalized lithium-ion power battery series battery pack
  • Charge-discharge automatically equalized lithium-ion power battery series battery pack

Examples

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Embodiment 1

[0039] Such as Figure 1 to Figure 4 As shown, a lithium-ion power battery series battery pack with automatic charging and discharging equalization is composed of several single lithium-ion power batteries 1 connected in series, and each single lithium-ion power battery 1 is provided with a reference circuit 6, voltage stabilizing The circuit 7 and the temperature switch 8 also include a single lithium ion balance battery 2 and a chip 9, the positive pole B+ of each single lithium ion power battery 1 is connected to the positive pole B+ of the single lithium ion balance battery 2, and each A charge control circuit 3 is arranged between the single lithium ion power battery 1 and the single lithium ion balance battery 2, and a discharge control circuit is also arranged between each single lithium ion power battery 1 and the single lithium ion balance battery 2 4. An overcharge and overdischarge protection circuit 5 is installed in parallel on each single lithium-ion power batter...

Embodiment 2

[0052] Such as Figure 5 As shown, this embodiment is another technical solution of the present invention. This embodiment is basically the same as Embodiment 1, the difference is that the negative electrode S- of each single lithium ion power battery 1 and the single lithium ion balance battery 2 The negative pole S- of the battery is connected, the charge control part 3-1 is set between the positive pole B+ of the single lithium ion power battery 1 and the positive pole S+ of the single lithium ion balance battery 2, and the discharge control part 4-1 is set between the positive pole S+ of the single lithium ion power battery 1. Between the positive pole B+ of the battery 1 and the positive pole S+ of the single lithium-ion balance battery 2, the GND terminal of the chip 9 is connected to the positive pole B+ of the single lithium-ion power battery 1, the chip 9, the power tube Q1, the power tube Q1 and the power tube 10 The model can be adjusted accordingly. Since the nega...

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Abstract

The invention relates to a lithium-ion power battery, especially to a charge-discharge automatically equalized lithium-ion power battery series battery pack, which consists of several single lithium-ion power batteries (1) connected in series, and additionally single lithium-ion equilibrium batteries (2) and a chip (9). The positive electrode of each single lithium-ion power battery (1) is in connection with the positive electrode of a single lithium-ion equilibrium battery (2). A charge control circuit (3) and a discharge control circuit (4) are disposed between each single lithium-ion power battery (1) and single lithium-ion equilibrium battery (2). And each single lithium-ion power battery (1) is provided with an overcharge and overdischarge protection circuit (5). The invention also provides another scheme that the negative electrode of each single lithium-ion power battery (1) is in connection with the negative electrode of each single lithium-ion equilibrium battery (2). According to the invention, the battery back can operate in an ideal state all the time, and has the advantages of simple structure, long service life, high charge-discharge efficiency, and low cost.

Description

technical field [0001] The invention relates to a lithium-ion power battery, in particular to a lithium-ion power battery series battery pack with automatic charging and discharging balance, and belongs to the field of power batteries. Background technique [0002] At present, lithium-ion power batteries are widely used, and they can be used in many fields such as various electric tools, electric bicycles, electric motorcycles, and electric vehicles. Lithium-ion power batteries are used as the power source for power supply. In practical applications, several single lithium-ion power batteries are usually connected in series to form lithium-ion power battery series battery packs and then used in groups to meet the voltage and power requirements of different equipment. Requirements; at the same time, based on the charging and discharging characteristics of lithium-ion power batteries and the actual situation of differences between individual batteries in actual use, it is nece...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M10/0525H01M10/44
CPCY02E60/10
Inventor 周金平
Owner 周金平
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