Battery pack sealing detection method, system and vehicle
A technology of seal detection and battery pack, which is applied in the automotive field, can solve the problems of endangering the safety of occupants, the sealing of the battery pack cannot reach IP67, and the inability to effectively judge the sealing status of the battery pack, so as to achieve the effect of improving safety and reliability
Active Publication Date: 2020-10-02
SVOLT ENERGY TECHNOLOGY CO LTD
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Problems solved by technology
[0002] The operating conditions of the vehicle are complex. For electric vehicles, if the vehicle is in wading, battery pack charging and other operating conditions, if the battery pack is not well sealed and soaked in water, it may cause problems such as short circuit, fire, explosion, etc., endangering the safety of passengers and causing property loss
[0003] Since the battery pack has a breathing valve, the breathing valve has the function of balancing the internal and external air pressure of the battery pack, preventing dust, preventing liquid water under a certain pressure from entering the battery pack, and reducing the concentration of harmful gases leaked from the battery in the pack. Therefore, depending on the pressure The sensor cannot effectively judge the sealing state of the battery pack
[0004] In addition, the waterproof level of the power battery pack for vehicles is IP67, which requires waterproofing at 1m underwater for 3 hours. If the battery pack is soaked in water for a long time, leakage may occur even if the water depth is less than 1m, and the safety of the battery pack cannot be guaranteed.
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[0040] It should be noted that, in the case of no conflict, the embodiments of the present invention and the features in the embodiments can be combined with each other.
[0041] The present invention will be described in detail below with reference to the accompanying drawings and examples.
[0042] figure 1 is a flow chart of a battery pack sealing detection method according to an embodiment of the present invention.
[0043] Before describing the sealing detection method of the battery pack according to the embodiment of the present invention, the battery pack is first introduced. The battery pack usually includes a power battery and a sealed cavity for sealing the power battery. The power battery is arranged in the sealed cavity. There is a breather valve on the sealed cavity, which has the functions of balancing the air pressure inside and outside the battery pack, preventing dust, preventing liquid water under a certain pressure from entering the battery pack, and reducin...
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The invention provides a battery pack sealing detection method and system and a vehicle. The method comprises the steps of detecting whether or not a sealing detection signal of a battery pack is received; if yes, inflating a sealed cavity, and stopping inflation till the air pressure in the sealed cavity rises from normal pressure to first predetermined pressure; depressurizing the sealed cavitythrough a breathing valve till the air pressure in the sealed cavity is reduced to the normal pressure, and recording depressurizing time; judging whether or not the depressurizing time is shorter than first predetermined time; if yes, determining that the sealed cavity leaks air, and giving an air leakage alarm. By means of the method, whether or not the sealed state of the battery pack is good can be detected effectively in real time, an early warning is conducted when the battery pack is not tightly sealed, and therefore the safety and reliability of the battery pack can be improved.
Description
technical field [0001] The invention relates to the technical field of automobiles, in particular to a battery pack sealing detection method, system and vehicle. Background technique [0002] The operating conditions of the vehicle are complex. For electric vehicles, if the vehicle is in wading, battery pack charging and other operating conditions, if the battery pack is not well sealed and soaked in water, it may cause problems such as short circuit, fire, explosion, etc., endangering the safety of passengers and causing property loss. [0003] Since the battery pack has a breathing valve, the breathing valve has the function of balancing the internal and external air pressure of the battery pack, preventing dust, preventing liquid water under a certain pressure from entering the battery pack, and reducing the concentration of harmful gases leaked from the battery in the pack. Therefore, depending on the pressure The sensor cannot effectively judge the sealing state of the...
Claims
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IPC IPC(8): B60L3/00B60L50/64H01M10/42
CPCB60L3/0046B60L50/64H01M10/4228Y02E60/10Y02T10/70
Inventor 任飞孙艳彭星曹雪平
Owner SVOLT ENERGY TECHNOLOGY CO LTD