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Overcharge/overdischarge detection apparatus, overcharge/overdischarge detection circuit, and semiconductor apparatus

一种检测装置、检测电路的技术，应用在电池过放电保护、测量装置、电池断开电路等方向，能够解决寿命缩短等问题，达到简单结构的效果

Inactive Publication Date: 2006-04-05
MITSUMI ELECTRIC CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the life of lithium-ion batteries will be extremely shortened due to overcharging and overdischarging, etc.

Method used

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  • Overcharge/overdischarge detection apparatus, overcharge/overdischarge detection circuit, and semiconductor apparatus
  • Overcharge/overdischarge detection apparatus, overcharge/overdischarge detection circuit, and semiconductor apparatus
  • Overcharge/overdischarge detection apparatus, overcharge/overdischarge detection circuit, and semiconductor apparatus

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no. 2 Embodiment

[0058] Figure 6 Shown is a structural block diagram of the second embodiment of the present invention. This graph is related to figure 1 The same structures are assigned the same reference numerals and their descriptions are omitted.

[0059] The structure of the circuit board 214 of the battery pack 200 of this embodiment is different from that of the first embodiment. The circuit board 214 of this embodiment employs a configuration in which the test terminal T17 of the overcharge / overdischarge detection IC 231 is also used as the liquid leakage detection terminal T14 of the first embodiment.

[0060] The test terminal T17 of the overcharge / overdischarge detection IC 231 is connected to the test terminal T5 for connection to the outside, and one end of the wiring pattern 132 is connected. In addition, the test terminal T17 is connected to the oscillation circuit 146 and the liquid leakage detection unit 145 inside the overcharge / overdischarge detection IC 231 .

no. 3 Embodiment

[0062] Figure 7 Shown is a structural block diagram of the third embodiment of the present invention. This graph is related to figure 1 The same reference numerals are used for the same structures, and their descriptions are omitted.

[0063] The battery pack 300 of this embodiment differs from the first embodiment in the structure of the circuit board 314 . On the circuit board 314 of this embodiment, a liquid leakage notification terminal T6 is provided. The liquid leakage notification terminal T6 is connected to a host device when the battery pack 300 is mounted on the device.

[0064] In addition, the liquid leakage notification terminal T6 is connected to the liquid leakage notification terminal T18 of the overcharge / overdischarge detection IC 331 via the wiring pattern 132 on the circuit board 314 . In the overcharge / overdischarge detection IC 331 , the output of the liquid leakage detection unit 145 is supplied to the liquid leakage notification terminal T18 via th...

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Abstract

The present invention provides an overcharge / overdischarge detection apparatus includes a detection terminal being in an open state, a detection part for detecting application of voltage to the detection terminal, a switch part for switchably connecting and disconnecting a secondary battery with an external circuit, and a control part for controlling the switch part in a case where the detection part detects the application of voltage to the detection terminal.

Description

technical field [0001] The present invention relates to an overcharge / overdischarge detection device, an overcharge / overdischarge detection circuit, and a semiconductor device, and more particularly to an overcharge / overdischarge detection device, an overcharge / overdischarge detection circuit, and a semiconductor device for controlling charge and discharge of a secondary battery. semiconductor device. Background technique [0002] A battery pack using a lithium-ion battery is mounted as a power source for portable terminal devices such as mobile phones. However, the life of lithium-ion batteries is extremely shortened due to overcharging and overdischarging. Therefore, it is necessary to mount a protection circuit for protecting the battery during overcharge, overdischarge, overcurrent, short circuit, and the like (see Patent Document 1). [0003] [Patent Document 1] JP-A-2003-59467 Contents of the invention [0004] However, conventional battery packs are not equipped ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R31/36H01R12/04
CPCY02E60/12H02J2007/0037H01M10/42H02J7/0031H02J2007/004H02J7/00302H02J7/00306Y02E60/10H02J7/00304H02G15/007
Inventor 大下和洋池内亮
Owner MITSUMI ELECTRIC CO LTD
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