Battery thermal runaway simulation method and device and battery pack thermal runaway spreading test system
A simulation method and thermal runaway technology, applied in the direction of measuring devices, measuring electricity, measuring electrical variables, etc., can solve the problems of affecting and affecting the normal use of battery packs, and low reliability of battery pack thermal runaway spread tests, and improve the The effect of credibility
Pending Publication Date: 2022-04-12
JINGWEI HIRAIN (TIANJIN) RES&DEV CO LTD
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Problems solved by technology
However, this triggering method will introduce external energy into the battery pack, and the location of the needle, the speed of the needle, and the deformation of the battery cell after the needle will all affect the energy released by the thermal runaway of the battery. The battery pack thermal runaway spread test The reliability of the battery pack is not high, which affects the normal use of the battery pack
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[0054] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.
[0055] The invention provides a battery thermal runaway simulation method, such as figure 1 As shown, the method includes:
[0056] Step 101: Determine the thermal characteristic curve of a battery cell in the battery pack; the thermal characteristic curve of the battery cell reflects the law of the temperature of the battery cell changing with time.
[0057] There are multiple battery cells in the battery pack, and different types of battery cells have diffe...
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The embodiment of the invention provides a battery thermal runaway simulation method and device and a battery pack thermal runaway spreading test system. The method comprises the following steps: determining a thermal characteristic curve of a single battery in a battery pack; replacing the single battery with a heating device; the difference value between the heat exchange area of the heating device and the heat exchange area of the single battery is within a first preset difference value range, and the difference value between the heat capacity of the heating device and the heat capacity of the single battery is within a second preset difference value range; and during battery thermal runaway simulation, controlling the temperature of the heating device to change according to the thermal characteristic curve of the battery monomer, so that the similarity between the thermal characteristic curve of the heating device and the thermal characteristic curve of the battery monomer is within a preset similarity range. The reliability of the thermal runaway spreading test of the battery pack can be improved.
Description
technical field [0001] The invention relates to the technical field of batteries, in particular to a battery thermal runaway simulation method and device, and a battery pack thermal runaway spread test system. Background technique [0002] When a battery cell in a battery pack undergoes thermal runaway, it will transfer a large amount of heat to adjacent battery cells, which may cause thermal runaway of adjacent battery cells, resulting in the spread of thermal runaway of the battery pack. In order to prevent the thermal runaway spread of the battery pack during the use of the battery pack, a battery pack thermal runaway spread test is required, and the battery pack that meets the safety requirements of the thermal runaway spread can be put into use. [0003] At present, when conducting thermal runaway propagation tests of battery packs, acupuncture is usually used to trigger thermal runaway of battery cells. However, this triggering method will introduce external energy in...
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IPC IPC(8): G01R31/378G01R31/392
Inventor 高尚
Owner JINGWEI HIRAIN (TIANJIN) RES&DEV CO LTD