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Battery protection integrated circuit, battery protection apparatus and battery pack

An integrated circuit and battery technology, applied in battery circuit devices, emergency protection circuit devices, circuit devices, etc., can solve problems such as false detection of control signals

Active Publication Date: 2016-11-30
MITSUMI ELECTRIC CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] However, in a circuit that detects a signal based on the ground potential of the secondary battery as in the above-mentioned prior art, there is a potential difference between the ground of the load and the ground of the secondary battery. Possibility of false detection of the control signal of the reference potential, where the negative terminal is connected to the ground of the load

Method used

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  • Battery protection integrated circuit, battery protection apparatus and battery pack
  • Battery protection integrated circuit, battery protection apparatus and battery pack
  • Battery protection integrated circuit, battery protection apparatus and battery pack

Examples

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Embodiment Construction

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

[0040] figure 1 It is a configuration diagram showing an example of the battery pack 100 and the electronic device 130 . The battery pack 100 incorporates a secondary battery 200 capable of supplying electric power to an electronic device 130 connected to the positive terminal 5 and the negative terminal 6 , and a battery protection device 110 for protecting the secondary battery 200 . The battery pack 100 may also be built in the electronic device 130 or externally installed in the electronic device 130 .

[0041] The electronic device 130 is an example of a load powered by the secondary battery 200 of the battery pack 100 . Specific examples of the electronic device 130 include portable portable terminal devices and the like. Specific examples of the portable terminal device include electronic devices such as mobile phones, smartphones, tablet PCs, game consoles, televisi...

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Abstract

The invention provides a battery protection integrated circuit, a battery protection apparatus and a battery pack so as to reduce erroneous detections of the control signal generated on the basis of a potential of the negative terminal coupled to the ground of the load. The battery protection integrated circuit for protecting a secondary battery by controlling a charge or discharge operation of the secondary battery is powered by a secondary battery, the battery protection integrated circuit comprising: a power supply terminal connected to a positive electrode of the secondary battery; a ground terminal connected to a negative electrode of the secondary battery; an input terminal connected to a negative terminal that is coupled to ground of a load; a control terminal at which a control signal is input, wherein the control signal has a voltage level with reference to a potential at the negative terminal; a signal detection circuit configured to detect a relative voltage level of the control signal input at the control terminal with reference to a potential at the input terminal; and a control circuit configured to control a switching circuit that is connected to a charge or discharge path between the negative electrode and the negative terminal based on the control signal detected by the signal detection circuit.

Description

technical field [0001] The invention relates to a battery protection integrated circuit, a battery protection device and a battery pack. Background technique [0002] Conventionally, there is known a device (for example, refer to Patent Document 1): by opening the charge and discharge control switch inserted in the charge and discharge path between the negative terminal of the secondary battery and the negative terminal connected to the ground of the load, to protect the the secondary battery. This device has an external signal detection circuit that detects an external signal that turns off a charge-discharge control switch with reference to the ground potential of the secondary battery. [0003] prior art literature [0004] Patent Document 1: Japanese Patent Laid-Open No. 2012-257407 [0005] However, in a circuit that detects a signal based on the ground potential of the secondary battery as in the above-mentioned prior art, there is a potential difference between the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J7/00H02H7/18
CPCH02H7/18H02J7/0031H02J7/0036H01M10/425H01M2010/4271H01M10/0525H01M2010/4278H01M2220/30H02J7/00302H02J7/00304H02J7/00306Y02E60/10G01R31/382H01M50/20H01M10/4257
Inventor 安部修平
Owner MITSUMI ELECTRIC CO LTD
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