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Circuit for controlling series battery charge and discharge

A technology for battery packs connected in series and charge control, which is applied in the direction of battery circuit devices, circuit devices, collectors, etc., can solve the problems that the charging capacity of batteries cannot be fully utilized, reduce the charging and discharging efficiency of battery packs or power batteries, and achieve The effect of prolonging the service life and improving the efficiency of use

Inactive Publication Date: 2008-10-22
BEIJING JINGYI JINGYE ELECTRIC TECH
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Problems solved by technology

[0007] see figure 1 , figure 2 , image 3 , in view of the difference in the initial state of each battery in the series battery pack and the difference in charging / discharging characteristics, the traditional charging method controls the charging and discharging of the series battery pack, and the charging capacity of each battery cannot be fully utilized, reducing the battery life. For the technical problem of charging and discharging efficiency of battery packs or power batteries, the present invention adopts the technical scheme of setting a changeover switch 2 between adjacent batteries 1 in a series battery pack, and the charging and discharging process is controlled by a microcontroller 10, and the charging The process adopts multi-level constant current charging from high to low

Method used

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  • Circuit for controlling series battery charge and discharge
  • Circuit for controlling series battery charge and discharge
  • Circuit for controlling series battery charge and discharge

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Embodiment Construction

[0026] see image 3 and Figure 4 , this embodiment is aimed at the application of a power battery composed of four batteries connected in series.

[0027] Microcontroller 10 adopts AT89S52 single-chip microcomputer, transfer switch 2 adopts JQX-15F electromagnetic relay, voltage detection circuit 3 adopts MAX472 high common mode voltage differential amplifier, A / D conversion circuit 4 adopts AD78888 channel analog-to-digital conversion integrated circuit, battery 1 adopts 3.6 There are 4 V4AH lithium batteries. The battery switching control circuit 12 adopts 74hc373 integrated circuit. The temperature sensor 5 adopts LM75 digital temperature sensor. The charging control circuit 11 adopts the 74hc373 integrated circuit, the electricity metering circuit 13 adopts the DS2751AE integrated circuit with current time integration and current digital output, the current sensor 14 adopts the sampling resistance of 10 milliohms, the protection circuit 15 adopts the LM358 operational am...

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Abstract

With mounting switch unit between batteries in battery pack, the switch control is made for each battery that balances the difference in initial charging state of each battery infecting charging and discharging efficiency.

Description

Technical field [0001] The invention relates to a circuit for controlling the charging and discharging of a series-connected battery pack, in particular to controlling the charging and discharging of a power battery, and belongs to the category of electrical control. Background technique [0002] The power battery is the power source for electric loads such as electric tools, electric vehicles, electric bicycles, and emergency lighting. A power battery is a battery pack composed of multiple single cells in series. The higher the voltage, the more single cells need to be connected in series. Due to the control accuracy of the production process, the various electrochemical parameters of each single cell are different, and the capacity, charge-discharge characteristics and initial state of each single cell are difficult to be completely consistent. After a plurality of single cells are connected in series to form a battery pack to form a power battery, the differences in the ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02J7/00H02J7/04
Inventor 赵建和
Owner BEIJING JINGYI JINGYE ELECTRIC TECH
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