# US 8,751,176 B2 · Apparatus for monitoring battery voltage and temperature > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 8,751,176 B2 - Document ID: US8751176B2 - Status: Granted - Kind: B2 - Application number: 13/128,070 - Filed: 2009-11-18 - Published: 2011-09-08 - Granted: 2014-06-10 - Earliest claimed: 2008-11-20 - Assignees: Chery Automobile Co., Ltd. - Applicants: Yue Wang - Inventors: Yue Wang - Web page: https://patentgrep.com/patent/US8751176B2 ## CPC - G01R 31/396: Acquisition or processing of data for testing or for monitoring individual cells or groups of cells within a battery - G01K 13/10: for measuring temperature within piled or stacked materials (by special arrangements for conducting heat from the object to the sensitive heat element G01K1/16) - G01R 31/3835: involving only voltage measurements - Y02T 10/70: Energy storage systems for electromobility, e.g. batteries - Y02T 90/16: Information or communication technologies improving the operation of electric vehicles - G01R: MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES (indicating correct tuning of resonant circuits H03J3/12) - G01K: MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR (radiation pyrometry G01J5/00) - Y02T: CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION ## Abstract An apparatus for monitoring battery voltage and temperature includes a host controller and acquisition boards, and every acquisition board for the battery includes a voltage acquisition module, a temperature acquisition module, a host control chip MCU, A/D convertor module, an opto-isolator module, a CAN bus communication module and two external connection ports CN1, CN2. The input end of the AD transformation module is connected with the output end of the voltage acquisition module and the temperature acquisition module, and the output end of the A/D convertor module is connected with the opto-isolator module via a SPI bus, and the I/O port of the SPI bus module in the main control chip MCU is connected with the opto-couple isolation module, and the host control chip MCU is connected with the CAN bus communication module of the host controller via the CAN bus communication module, and the acquisition boards are connected via a socket piece in turn. ## Claims ### Claim 1 An apparatus for monitoring battery voltage and temperature comprising a host controller and acquisition boards, characterized in the following: the acquisition board for each battery pack includes a voltage acquisition module, a temperature acquisition module, a host control chip MCU, an A/D convertor module, an opto-isolator module, a CAN bus communication module and two external connection ports CN1, CN2; wherein the input end of the A/D convertor module is connected with the output ends of the voltage acquisition module and the temperature acquisition module; the output end of the A/D convertor module is connected with the opto-isolator module via a SPI bus; a I/O port of the SPI bus module in the host control chip MCU is connected with the opto-isolator module; the host control chip MCU is connected with the CAN bus communication module on the host controller via the CAN bus communication module; the acquisition boards are connected with one another in turn with connection port CN1 of one acquisition board being connected with connection port CN2 of the next acquisition board via a socket piece; and the power supply of the host controller powers the host control chip MCU on each acquisition board via the connection ports of the acquisition board; both the connection ports CN1 and CN2 on the acquisition board are 6-pin ports, one pin as power supply line, two pins as grounding line, two pins as CAN bus and one pin as I/O port of the host control chip MCU on the acquisition board. ### Claim 2 (depends on 1) The apparatus for monitoring battery voltage and temperature of claim 1, wherein each acquisition board only collects the voltage and temperature of one single battery pack. ### Claim 3 (depends on 1) The apparatus for monitoring battery voltage and temperature of claim 1, wherein the opto-isolator module on the acquisition boards isolates the voltage acquisition module and the temperature acquisition module from the host control chip MCU. ### Claim 4 (depends on 1) The apparatus for monitoring battery voltage and temperature of claim 1, wherein the single battery pack powers the voltage acquisition module, the temperature acquisition module, the A/D convertor module and the opto-isolator module after its voltage being filtered and regulated through a voltage regulator chips. ### Claim 5 (depends on 1) The apparatus for monitoring battery voltage and temperature of claim 1, wherein after passing through the opto-isolator module, control signals issued by the host control chip MCU on the acquisition board control the voltage acquisition module, the temperature acquisition module and the A/D convertor module to start or terminate operation. ### Claim 6 (depends on 1) The apparatus for monitoring battery voltage and temperature of claim 1, wherein the power supply of the host controller powers the host control chip MCU, the opto-isolator module and the CAN driver module on acquisition board. ### Claim 7 (depends on 1) The apparatus for monitoring battery voltage and temperature of claim 1, wherein the host control chip MCU on the acquisition board controls the next acquisition board connected with its connection port CN2 to transmit data to the host controller. ### Claim 8 (depends on 1) The apparatus for monitoring battery voltage and temperature of claim 1, wherein the I/O port of the host control chip MCU on acquisition board is connected with the opto-isolator module through the SPI bus. ### Claim 9 (depends on 1) The apparatus for monitoring battery voltage and temperature of claim 1, wherein in the voltage acquisition module and the temperature acquisition module, a filter circuit is used to remove the electromagnet interference on the voltage and temperature signals from the entire vehicle; the filtered voltage signals are partitioned by a precision resistor and pass through an operational amplifier before being input into the A/D convertor module for simulant-to-digital conversion.