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Battery pack air pressure monitoring system

A technology for air pressure monitoring and battery packs, applied in measuring devices, measuring fluid pressure, instruments, etc., can solve the problems of inability to remove the influence of battery packs, unreliable data, etc., to achieve accurate and reliable measurement values, ensure accuracy, and ensure air tightness sexual effect

Pending Publication Date: 2018-11-23
SHENZHEN YIXUN TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the prior art, the influence of thermal expansion and contraction on the internal air pressure of the battery pack cannot be removed at different temperatures, so there is a disadvantage of unreliable data

Method used

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  • Battery pack air pressure monitoring system
  • Battery pack air pressure monitoring system
  • Battery pack air pressure monitoring system

Examples

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Embodiment Construction

[0041] The principles and features of the present invention are described below in conjunction with the accompanying drawings, and the examples given are only used to explain the present invention, and are not intended to limit the scope of the present invention.

[0042] Such as figure 1 and figure 2 As shown, a battery pack air pressure monitoring system includes an optical fiber 1 , an air pressure sensor 2 , a temperature sensor, a photoelectric demodulator 4 and a BMS unit 5 . Among them, the BMS (Battery Management System) unit is the battery management system.

[0043] The optical fiber 1 , the air pressure sensor 2 , the temperature sensor, the photoelectric demodulator 4 and the BMS unit 5 are all arranged in the casing of the battery pack. It is not difficult to understand that in order to monitor the internal air pressure of the battery pack, it is necessary to arrange the optical fiber 1 , the air pressure sensor 2 and the temperature sensor in the casing of the...

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Abstract

The invention relates to a battery pack air pressure monitoring system. The system comprises an optical fiber, an air pressure sensor, a temperature sensor, a photoelectric demodulator and a BMS unit.The air pressure sensor comprises a hard sleeve, a strain gauge and a front end horn portion. The front end horn portion comprises a first side surface, a first large bottom surface and a first smallbottom surface, wherein the first large bottom surface and the first small bottom surface are formed on the two ends of the first side surface. The front end horn portion is arranged on the front endof the hard sleeve. The strain gauge is arranged on the first large bottom surface. The rear end of the hard sleeve is provided with a sealing component. A sealing cavity is formed between the straingauge and the sealing component. One side of the strain gauge, which is close to the sealing cavity, is provided with a reflection surface. One end of the optical fiber is connected to the photoelectric demodulator. The other end of the optical fiber is arranged in the sealing cavity and points to the strain gauge. The temperature sensor is an FBG. The photoelectric demodulator is connected to the BMS unit. The air pressure sensor measures the internal air pressure of a battery pack, and then temperature compensating is performed so that a measured value is accurate and reliable, and the real-time state of the battery pack can be comprehensively reflected.

Description

technical field [0001] The invention relates to the field of battery monitoring and the field of optical fiber technology, in particular to a battery pack air pressure monitoring system. Background technique [0002] The battery pack is the core energy source of new energy vehicles, providing driving power for the entire vehicle. With the widespread application of new energy vehicles, people's requirements for battery safety are getting higher and higher. [0003] The battery pack mainly includes a casing and a plurality of battery cells arranged in the casing, and several pressure relief valves are arranged on the surface of the casing. Generally speaking, if a battery cell has a thermal management failure or an internal short circuit fault, the oxidation-reduction reaction in the battery cell will be out of control, thereby generating a large amount of gas. As the gas increases, when the internal pressure of the battery pack rises to a threshold, the battery will bulge o...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01L11/00G01L19/04
CPCG01L11/00G01L19/04
Inventor 谢建毫刘东昌
Owner SHENZHEN YIXUN TECH CO LTD
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