Temperature detection circuit and temperature detection method of lithium battery pack

A technology of temperature detection circuit and lithium battery pack, which is applied in the direction of thermometers, thermometers, and measuring devices using electrical/magnetic components that are directly sensitive to heat, can solve the problems of module temperature leakage, high cost and large capacity, etc. Achieve the effect of avoiding missed detection, wide application and low cost

Pending Publication Date: 2022-04-26
GUANGDONG ZHICHENG CHAMPION GROUP
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Problems solved by technology

[0006] Large-capacity lithium battery packs usually only have 1 to 2 strings of batteries due to their large capacity, which is not suitable for conventional BMUs with a limited number of temperature detection ports, because some modules may not have

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  • Temperature detection circuit and temperature detection method of lithium battery pack
  • Temperature detection circuit and temperature detection method of lithium battery pack

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[0029] The following technical solutions of the present invention are further described by specific embodiments.

[0030] In one particular embodiment, the present invention provides a lithium battery pack temperature detection circuit, the temperature detection circuit such as Figure 1 Described, comprising a bridge circuit consisting of four thermistors, the thermistor is disposed within the battery module, the resistance value of the thermistor changes with the temperature of the battery module; the two outputs of the bridge circuit are electrically connected to the battery management unit 5, the battery management unit 5 for receiving and detecting the resistance change of the thermistor.

[0031]The temperature detection circuit provided by the present invention to a plurality of battery modules managed by the battery management unit 5 as a unit, each cell module is arranged with the same number of thermistors, and outside the module these thermistors are constructed in a c...

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Abstract

The invention provides a temperature detection circuit and a temperature detection method of a lithium battery pack, the temperature detection circuit comprises a bridge circuit composed of four temperature-sensitive resistors, the temperature-sensitive resistors are arranged in a battery module, and the resistance values of the temperature-sensitive resistors change along with the temperature change of the battery module; the two output ends of the bridge circuit are electrically connected to the battery management unit, and the battery management unit is used for receiving and detecting the change of the resistance value of the temperature-sensitive resistor. According to the invention, the same number of temperature-sensitive resistors are arranged for each battery module in the unit, the temperature-sensitive resistors are constructed outside the module according to a certain sequence to form a bridge circuit, an output end matched with the battery management unit is provided for the battery management unit to acquire resistance data, the battery management unit converts the resistance value change to obtain temperature data, and the temperature data is stored in the battery management unit. The temperature detection scheme is low in cost and wide in application, a temperature sensing port does not need to be independently arranged on the battery module, and missing detection is avoided.

Description

Technical field [0001] The present invention belongs to the field of temperature detection technology, relates to a lithium battery pack temperature detection circuit and temperature detection method. Background [0002] In the current BMS battery management system, there are multiple battery modules, which are related to the stable operation of the entire battery management system, so it is very important to detect the temperature of the battery module. At present, the temperature and current of the module are monitored by the battery management system to prevent the module temperature from exceeding the allowable limit. [0003] CN110967635A discloses a temperature detection circuit and detection method, battery management system. The temperature detection circuit comprises: a temperature detection module for detecting the temperature of the battery module; a first trigger module, connected with a temperature detection module, for providing a first trigger signal when the temp...

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Application Information

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IPC IPC(8): G01K7/16
CPCG01K7/16
Inventor 朱可柯蒋连喜赵玮李东
Owner GUANGDONG ZHICHENG CHAMPION GROUP
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