Battery liquid injection structure, power battery, battery pack and electric vehicle
A battery and liquid injection technology, which is applied to structural parts, battery pack parts, circuits, etc., can solve the problems of low life of the battery top cover, liquid injection holes, and explosion-proof discs that cannot be reused, so as to improve the service life and prevent repeated leakage. The effect of repeated injection
Pending Publication Date: 2021-04-20
SHENZHEN RED FAIRY PRECISION TECH CO LTD
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[0005] This application provides a battery liquid injection structure, a power battery, a battery pack and an electric vehicle, aiming to solve the technical problem that the liquid injection hole and the explosion-proof sheet cannot be reused in the prior art, resulting in a low service life of the battery top cover
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[0041] The following will clearly and completely describe the technical solutions in the embodiments of the application with reference to the drawings in the embodiments of the application. Apparently, the described embodiments are only some of the embodiments of the application, not all of them. Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without making creative efforts belong to the scope of protection of this application.
[0042]In the description of the present application, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", " The orientation or positional relationship indicated by "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation shown in the drawings Or positional relationship is only for the convenience of describing the present application and simplifying ...
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The invention discloses a battery liquid injection structure, a power battery, a battery pack and an electric vehicle. At least a part of the battery liquid injection structure is arranged in a liquid injection hole of a battery top cover. The battery liquid injection structure comprises: a welding ring, which is arranged on the side, away from a battery cell, of the liquid injection hole, wherein the side wall of the welding ring is fixedly connected to the side wall of the liquid injection hole, and at least one pressure relief hole is formed in the welding ring; a moving part, which is arranged on the side, close to the battery cell, of the liquid injection hole, wherein the moving part abuts against the side wall of the liquid injection hole, a cavity is defined by the welding ring, the moving part and the side wall of the liquid injection hole, and the pressure relief hole communicates with the cavity; a sealing ring, which is arranged between the side wall of the moving part and the side wall of the liquid injection hole; and an elastic part, wherein the two ends of the elastic part are connected to the welding ring and the moving part correspondingly, and the elastic part can extend or retract in a preset direction so as to drive the moving part to move away from or towards the welding ring. By arranging the elastic part, repeated liquid injection and repeated pressure relief of the battery liquid injection structure are achieved, and the service life of the power battery is prolonged.
Description
technical field [0001] The present application relates to the technical field of the battery top cover, in particular to a battery liquid injection structure, a power battery, a battery pack and an electric vehicle. Background technique [0002] The liquid injection hole provided by the existing power battery on the battery top cover is usually sealed with a rubber plug, and then welded to the top cover liquid injection hole with aluminum nails. Although this kind of sealing method can completely seal the liquid injection hole, it can only be injected once. If the electrolyte needs to be added later, it will not be injected, and the entire battery can only be scrapped, causing losses. [0003] At the same time, the explosion-proof sheet is installed on the existing battery top cover to achieve explosion-proof. When the internal pressure of the battery is too high, the explosion-proof sheet is used to burst to release the pressure to avoid battery explosion. However, the expl...
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IPC IPC(8): H01M50/325H01M50/645
CPCY02E60/10
Inventor 王有生李华远浩夏春文
Owner SHENZHEN RED FAIRY PRECISION TECH CO LTD