Invention Grant
US08120209B2 Voltage sensing device for an individual cell of a group of battery cells
有权
用于一组电池单元的单个电池的电压感测装置
- Patent Title: Voltage sensing device for an individual cell of a group of battery cells
- Patent Title (中): 用于一组电池单元的单个电池的电压感测装置
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Application No.: US12553404Application Date: 2009-09-03
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Publication No.: US08120209B2Publication Date: 2012-02-21
- Inventor: Toru Tanaka , Akio Ogura , Kazuya Omagari , Nariaki Ogasawara
- Applicant: Toru Tanaka , Akio Ogura , Kazuya Omagari , Nariaki Ogasawara
- Applicant Address: US TX Dallas
- Assignee: Texas Instruments Incorporated
- Current Assignee: Texas Instruments Incorporated
- Current Assignee Address: US TX Dallas
- Agent William B. Kempler; Wade J. Brady, III; Frederick J. Telecky, Jr.
- Priority: JP2008-226500 20080903
- Main IPC: H01H31/10
- IPC: H01H31/10 ; H01H33/59 ; H01H47/00 ; H01H85/46 ; H01H19/14
Abstract:
A voltage sensing device with which high-precision voltage sensing is possible without the need to obtain a unique correction constant for each device. A pair of voltage input nodes NCk and NCk-1 is selected from voltage input nodes NC0-NCn in switch part 10, and they are connected to sensing input nodes NA and NB in two types of patterns with different polarity (forward connection, reverse connection). Sensing input nodes NA and NB are held at reference potential Vm by voltage sensing part 20, and current Ina and Inb corresponding to the voltage at voltage input nodes NCk and NCk-1 flows to input resistors RIk and RIk-1. Currents Ina and Inb are synthesized at different ratios in voltage sensing part 20, and sensed voltage signal S20 is generated according to the synthesized current Ic. Sensed voltage data S40 with low error is generated according to the difference between the two sensed voltage signals S20 generated in the two connection patterns.
Public/Granted literature
- US20100090540A1 VOLTAGE SENSING DEVICE Public/Granted day:2010-04-15
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