Battery protection circuit and battery protection device and battery pack

A battery protection device and protection circuit technology, applied in battery circuit devices, emergency protection circuit devices, circuit devices, etc., can solve the problem that the abnormality of the secondary battery 201A and the secondary battery 201B cannot be detected independently, and achieve enhanced protection The effect of the function

Inactive Publication Date: 2013-03-27
MITSUMI ELECTRIC CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, since the two secondary batteries 201A and 201B connected in parallel are regarded as one secondary battery to detect an abnormality, the protection IC 190 cannot independently detect the abnormality of the secondary battery 201A and the secondary battery 201B.

Method used

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  • Battery protection circuit and battery protection device and battery pack
  • Battery protection circuit and battery protection device and battery pack
  • Battery protection circuit and battery protection device and battery pack

Examples

Experimental program
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Embodiment Construction

[0028] Embodiments of the present invention will be described below with reference to the drawings.

[0029] figure 2 It is a block diagram of the battery case 100 which is 1st Embodiment of this invention. The battery case 100 incorporates a secondary battery 200 capable of supplying electric power to an unillustrated external load connected to the load connection terminals 5 and 6 , and a protection module 80 for protecting the secondary battery 200 . The battery box 100 can be built in an external load, or can be externally connected to the external load. Specific examples of external loads include electronic devices such as portable terminals (portable phones, portable game machines, PDAs, mobile computers, portable music or video players, etc.), computers, earphones, and cameras.

[0030] The secondary battery 200 can be charged by a charger (not shown) connected to the load connection terminals 5 and 6 . Specific examples of the secondary battery 200 include lithium-...

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PUM

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Abstract

The invention provides a battery protection circuit and a battery protection device, and a battery pack, which may improve the protection function with respect to a plurality of secondary batteries (200A,200B) that are connected in parallel. The battery protection circuit which protects the secondary batteries (200A,200B) comprises a discharge control part 24 to prohibit a discharge of at least one secondary battery when the abnormality signal is output from at least one of the overdischarge detection part and the overcurrent detection part; and a a charge control part configured to prohibit a charge of at least one of the plurality of secondary batteries when the abnormality signal is output from at least one of the overcharge detection part and the overcurrent detection part.

Description

technical field [0001] The invention relates to a battery protection circuit and a battery protection device for protecting multiple secondary batteries connected in parallel. In addition, it also relates to a battery case provided with the battery protection device. Background technique [0002] figure 1 It is a diagram showing a conventional protection IC (integrated circuit: integrated circuit) 190 that protects two secondary batteries 201A and 201B connected in parallel. The positive electrodes of the secondary batteries 201A and 201B are connected to the power supply path 108 connected to the load connection terminal P+, and the negative electrodes of the secondary batteries 201A and 201B are connected to the power supply path 109 connected to the load connection terminal P−. An unillustrated external load and / or charger are connected to the load connection terminals P+ and P−. In addition, the terminal 7 a of the protection IC 190 is connected to the power supply li...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02H7/18
CPCY02E60/12H02J7/00H02J7/0031H02J7/00304H02J7/00306
Inventor 竹下顺司武田贵志
Owner MITSUMI ELECTRIC CO LTD
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