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Multichip, battery protection device and battery pack

A multi-chip, secondary battery technology, applied in battery overcharge protection, battery circuit device, battery overcurrent protection, etc., can solve the problem of increasing the total number of external connection terminals

Active Publication Date: 2019-12-24
MITSUMI ELECTRIC CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] However, when providing dedicated external connection terminals for accessing internal nodes of the monitoring IC from outside the package, the total number of external connection terminals increases

Method used

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  • Multichip, battery protection device and battery pack
  • Multichip, battery protection device and battery pack
  • Multichip, battery protection device and battery pack

Examples

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Embodiment Construction

[0051] Embodiments of the present invention will be described below with reference to the drawings.

[0052] figure 1 It shows an example of the configuration of the battery pack 100 including the multi-chip 140 . 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 can be built in the electronic device 130 or connected externally.

[0053] The electronic device 130 is an example of a load that uses the secondary battery 200 of the battery pack 100 as a power source. As a specific example of the electronic device 130, a mobile portable terminal device etc. are mentioned. Specific examples of the portable terminal device include electronic equipment such as a mobile phone, a smartphone, a tablet computer, a game machine, a television, a music ...

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Abstract

The present invention provides a multi-chip, battery protection device, and battery pack capable of suppressing the total number of external connection terminals even if external connection terminals that allow access to internal nodes of a monitoring IC from outside the package are provided. The multi-chip includes a protection IC for detecting overcharge, overdischarge, or overcurrent of a secondary battery and performing a protective operation, and a monitoring IC for monitoring the battery state of the secondary battery in one package, and the package has a first side An edge, a second side edge opposite to the first side edge, a regulator output terminal, a ground terminal, a power supply terminal and a current detection terminal are arranged on the first side edge side, and a communication terminal is arranged on the second side edge side. terminal, a discharge control terminal, a charge control terminal, and an overcurrent detection terminal, and a selection circuit for selectively switching the connection destination of a plurality of nodes of the internal circuit of the monitoring IC to the current detection terminal.

Description

technical field [0001] The invention relates to a multi-chip, a battery protection device and a battery pack. Background technique [0002] Conventionally, a protection monitoring circuit is known that includes a protection IC that performs a protection operation that prohibits charging or discharging of a secondary battery, and a monitoring IC that monitors the battery state of the secondary battery (for example, refer to Patent Document 1). [0003] In a multi-chip package in which a protection IC and a monitoring IC are packaged, it is necessary to provide external connection terminals for connecting the outside of the package and the inside of the package. For example, the protection IC can detect the state outside the package (for example, the current flowing in the secondary battery) via the detection terminal provided as the external connection terminal. In addition, by providing an internal node for connecting the monitoring IC to an external connection terminal out...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02J7/00H02H7/18
CPCH02J7/0026H02H7/18H02J7/0036H02J7/00302H02J7/00304H02J7/00306H02J7/00H01M10/425H01L2224/48137H01L2224/48145H01L2224/4911H01L2224/49113H01M2200/00H02J7/00034Y02E60/10H01L2924/00012H01M10/4257H01M10/48H02J7/0031H01M50/20H01M2010/4278H01M2010/4271
Inventor 今泉隆梶宏道
Owner MITSUMI ELECTRIC CO LTD
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