Lithium ion battery thermal runaway monitoring system and method
A lithium-ion battery and monitoring system technology, applied in the field of lithium-ion battery thermal runaway monitoring system, can solve the problems of high cost, complex process, low reliability of thermal runaway monitoring, etc., and achieves low cost, small calculation amount, and fast detection speed. Effect
Pending Publication Date: 2021-08-27
CHINA ELECTRIC POWER RES INST +3
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[0005] The purpose of the present invention is to overcome the shortcomings of low reliability, complicated process and high cost of thermal runaway monitoring in the above-mentioned prior art, and to provide a lithium-ion battery thermal runaway monitoring system and method
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[0027] In order to enable those skilled in the art to better understand the solutions of the present invention, the following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only It is an embodiment of a part of the present invention, but not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts shall fall within the protection scope of the present invention.
[0028] It should be noted that the terms "first" and "second" in the description and claims of the present invention and the above drawings are used to distinguish similar objects, but not necessarily used to describe a specific sequence or sequence. It is to be understood that the data so used are interchangeable under appropriate ...
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The invention belongs to the field of batteries, and discloses a lithium ion battery thermal runaway monitoring system and method. The monitoring system comprises a voltage source, deformation sensing pieces, a connecting line and a voltage detection device; The battery comprises a plurality of battery cells, and the deformation sensing pieces are located between the adjacent battery cells; one end of each deformation sensing piece is connected with the voltage source through a connecting line, and the other end is grounded through a connecting line; and the connecting line is provided with a voltage detection point connected with the voltage detection device. The monitoring method comprises the following steps of: obtaining the deformation states of the deformation sensing pieces by monitoring the changes of voltages on the deformation sensing pieces between the adjacent battery cells in the battery; obtaining the deformation states of the battery cells according to the deformation states of the deformation sensing pieces; and monitoring whether the battery has thermal runaway according to the deformation states of the battery cells. The problems of low reliability, complex process and high cost of existing lithium ion battery thermal runaway monitoring are effectively solved, and low-cost and high-reliability monitoring of battery thermal runaway is realized.
Description
technical field [0001] The invention belongs to the field of batteries, and relates to a thermal runaway monitoring system and method of a lithium-ion battery. Background technique [0002] At present, new energy vehicles mainly use lithium-ion power batteries as the power source. Among them, due to the relatively high energy density of ternary power batteries, the market share has surpassed lithium iron phosphate batteries and has become the mainstream power battery. According to international general guidelines, when the capacity retention rate of the power battery is lower than 80%, it must be decommissioned. However, the decommissioned ternary power battery also has a high echelon utilization value, for example, low-power electric vehicles, grid peak regulation and frequency regulation , and places such as backup power storage. In terms of safety, the ternary material of the ternary power battery is α-NaFeO 2 Due to the volume expansion and contraction during the char...
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CPCG01R31/3835
Inventor 张明杰杨凯范茂松张建华周自强梅简赵洲峰裘吕超高飞刘皓耿萌萌
Owner CHINA ELECTRIC POWER RES INST