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Battery collecting device and monitoring method

A collection device and battery technology, applied in the direction of measuring devices, measuring electricity, measuring electrical variables, etc., can solve problems such as increasing SOC error, false triggering of fault alarms, abnormal execution of battery management system strategies, etc., to achieve simple and effective reset, reduce abnormal effect

Pending Publication Date: 2018-02-23
SUNWODA ELECTRIC VEHICLE BATTERY CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In this way, in the distributed battery management system, there will be the application of multiple acquisition modules, but in conventional design schemes and practical applications, due to the complex operating conditions of the vehicle, the main circuit current will suddenly change, resulting in multiple BMUs The simultaneity of data collection cannot be satisfied, which will lead to asynchronous battery module voltage and current information, resulting in abnormal implementation of battery management system strategies, which will further affect the estimation of system impedance and SOC compensation by the battery management system, and even It will falsely trigger the fault alarm and increase the error of SOC

Method used

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Embodiment Construction

[0030] It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

[0031] Such as Figure 1-2 As shown, a battery status acquisition device of the present invention is provided, including BCU1, BMU2 and battery module 3; the battery module 3 is connected to the BCU1 through the acquisition wire harness 4; the BMU2 is connected to the BCU1 through the CAN bus 5 ; The BMU2 includes AFE 6, MCU7, fault alarm unit 8, reset module 9, wake-up unit 10 and synchronization signal trigger unit 11.

[0032] Further, the number of BMU2 is greater than or equal to 1.

[0033] Further, it also includes a first isolator 12 and a second isolator 13;

[0034] The CAN signals all pass through the first isolator 12 or the second isolator 13;

[0035] The first isolator 12 is a high-speed isolator;

[0036] The second isolator 13 is a passive isolator.

[0037] Further, the AFE is connected to the M...

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Abstract

The invention discloses a battery collecting device and monitoring method. The battery collecting device comprises a first isolator, a second isolator, a battery control plate (BCU), a battery collecting plate (BMU), and a battery module. The battery module is connected to the BCU through a collecting wire harness. The BMU is in communication connection with the BCU through a CAN signal. The CAN signal passes through the first isolator or the second isolator. The BMU includes an analog front end collecting unit (AFE), a master controller unit (MCU), a fault alarm unit, a reset module, a waking-up unit, and a synchronous signal triggering unit. The invention is advantageous in that under non-work state, the BMU can collect battery information regularly, and can trigger alarm in time when abnormity occurs; real-time monitoring and management can be conducted on the battery; simple and effective resetting can be realized during the waking-up process of the BMU, the situation of system program abnormity can be reduced.

Description

technical field [0001] The invention relates to the field of battery management systems, in particular to a battery collection device and a monitoring method. Background technique [0002] BMU is an important part of the battery management system (BMS), which is mainly used for the management of battery module voltage and temperature. Whether the battery module voltage and temperature information obtained by the BMS from the BMU is accurate and reliable in real time will seriously affect the correct execution of the system strategy by the BMS. Therefore, the real-time, stability and reliability of the BMU for battery module voltage and temperature data collection It will seriously affect the stability and security of the system. [0003] The battery management system can be divided into working mode and non-working mode according to the working state. In the working mode, the BMS enters the working state to manage the charging and discharging process of the battery module. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R31/36
CPCG01R31/382G01R31/389G01R31/396
Inventor 雷晶晶唐智李航曾志平王明旺王华文钟文彬
Owner SUNWODA ELECTRIC VEHICLE BATTERY CO LTD
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