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Charge/discharge control circuit and method for controlling charge/discharge

A charge and discharge control and circuit technology, applied in the field of charge and discharge control circuits, can solve the problems of increasing wiring width and heat generation, and achieve the effect of suppressing the increase of current

Active Publication Date: 2014-09-03
MITSUMI ELECTRIC CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When the charging current is doubled, there are problems such as an increase in the amount of heat generated during charging and the need to increase the wiring width of the wiring as a charging path.

Method used

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  • Charge/discharge control circuit and method for controlling charge/discharge
  • Charge/discharge control circuit and method for controlling charge/discharge
  • Charge/discharge control circuit and method for controlling charge/discharge

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Embodiment Construction

[0039] Embodiments of the present invention will be described below with reference to the drawings.

[0040]

[0041] figure 1 It is a block diagram showing an embodiment of the charge and discharge control circuit of the present invention. exist figure 1 Among them, the charging and discharging control circuit is integrated into a semiconductor circuit and becomes the protection IC 10 . A battery cell 11 and a battery cell 12 of a lithium ion battery serving as a secondary battery are disposed outside the protection IC 10 .

[0042] The positive pole of the battery unit 11 is connected to the terminal VDD2 of the protection IC 10 from the first power line L1 through the resistor R1, and also connected to one end of the switch SW2 in the battery pack and the terminal CHG of the battery pack (or the electronic device 13). The negative electrode of the battery unit 11 is connected to the first terminal a of the switch SW1 in the battery pack. in addition, figure 1 The swi...

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PUM

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Abstract

A charge / discharge control circuit for controlling charging and discharging of multiple secondary batteries includes a series-connection switch part that connects the multiple secondary batteries in series during the charging and connects the multiple secondary batteries in parallel during the discharging.

Description

technical field [0001] The present invention relates to a charge and discharge control circuit and a charge and discharge control method for controlling charge and discharge of a secondary battery. Background technique [0002] In recent years, mobile electronic devices such as smartphones and tablet terminals have become more highly functional. Therefore, the current consumption of the mobile electronic device increases, and in order to prolong the operating time of the mobile electronic device, an increase in battery capacity is required. [0003] In addition, a charge-discharge control circuit that controls charge-discharge of the secondary battery is a protection IC integrated into a semiconductor. The protection IC has a built-in overcharge voltage detection circuit, overdischarge voltage detection circuit, charge overcurrent detection circuit, discharge overcurrent detection circuit, etc. When the overdischarge voltage or discharge overcurrent is detected by the overd...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J7/00H01M10/44
CPCH02J7/0024H02J7/0026H02J7/00302H02J7/00306H02J7/00304
Inventor 竹下顺司
Owner MITSUMI ELECTRIC CO LTD