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Charge and discharge control apparatus

A charging and discharging control and recharging technology, applied to circuit devices, battery circuit devices, collectors, etc., can solve problems such as wasting electricity

Inactive Publication Date: 2013-01-23
TOYOTA IND CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, the discharged power is wasted

Method used

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  • Charge and discharge control apparatus
  • Charge and discharge control apparatus
  • Charge and discharge control apparatus

Examples

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Embodiment Construction

[0026] Hereinafter, details of the embodiments will be described based on the drawings.

[0027] figure 1 An example of a charge and discharge control device is shown. The charge and discharge control device according to the present embodiment may be installed in, but not limited to, vehicles such as plug-in hybrid vehicles, electric vehicles, and forklifts.

[0028] figure 1 The charging and discharging control device in includes a control unit 1, a voltage measuring unit 2, a rechargeable battery cell 3 (3a to 3d), a generator 4 (or an external power supply), a charger 5, a capacitor C1, and inductors L1 to L3 , and switching elements. The switching elements indicate switching elements SW11 to SW16 , SW21 to SW28 , SW31 to SW33 , and SW41 to SW44 .

[0029] The control unit 1 controls each part of the charge and discharge control device. The control unit 1 may be, for example, a battery ECU (Electronic Control Unit) installed in a vehicle. The control unit 1 may use, f...

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PUM

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Abstract

A charge and discharge control apparatus equalizes the voltages of rechargeable battery cells by using a charger or a capacitor charged by an external power source, by using a first cell balancing unit which charges the rechargeable battery cells until their voltage values become equal to the maximum voltage value of the rechargeable battery cells, and an inductor for charging or discharging adjacent rechargeable battery cells from among the rechargeable battery cells, and by using a second cell balancing unit which sequentially equalizes the voltages of the adjacent rechargeable battery cells.

Description

technical field [0001] The present invention relates to a charge and discharge control device for controlling charge and discharge of rechargeable battery cells. Background technique [0002] Conventionally, cell balancing is performed on a plurality of rechargeable battery cells installed in vehicles such as hybrid vehicles and electric vehicles in order to extend the charge-discharge cycle life of the cells. Cell balancing prolongs the charge-discharge cycle life of a rechargeable battery cell module by limiting the change or degradation between voltage values: caused by; can be enhanced by charging or discharging; and can be indicated when a cell is charging or discharging. Meanwhile, cell balancing prevents accidents caused when only specific rechargeable battery cells continue to be over-discharged or over-charged. [0003] However, in conventional cell balancing, the lowest voltage value of a rechargeable battery cell is detected, and the other rechargeable battery c...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J7/00H02J7/02
CPCY02T10/7055H02J7/0016H02J7/0019Y02T10/70
Inventor 仓石守
Owner TOYOTA IND CORP