Battery cell and battery module

Abstract

The application discloses an electric cell monomer and a battery module, and relates to the technical field of batteries. The electric cell monomer comprises an explosion-proof valve and a manifold pipe. One end of the manifold pipe is in communication with the explosion-proof valve, and a one-way valve is arranged in the manifold pipe. The one-way valve is configured to allow the medium escaping from the explosion-proof valve to pass through. The application can guide the medium into a safe area outside the electric cell monomer through the manifold pipe, directly reduce the temperature of the electric cell monomer, avoid the rupture of the shell of the electric cell monomer due to thermal runaway, and even avoid the splashing of fragments. In addition, the application can reduce the influence of the faulty electric cell monomer on other electric cell monomers, reduce the probability of heat diffusion caused by the medium, greatly improve the safety performance of the electric cell monomer and the battery module, significantly improve the controllability of the thermal runaway process, and minimize the loss.

Claims

1. A single battery cell, characterized in that, include: Explosion-proof valve (200); as well as A manifold (300) is provided, one end of which is connected to the explosion-proof valve (200). A one-way valve (400) is provided in the manifold (300), and the one-way valve (400) is configured to allow the medium escaping from the explosion-proof valve (200) to pass through.

2. The battery cell (100) according to claim 1, characterized in that, The manifold (300) includes a manifold body (310) and an anti-diffusion shield (320), wherein the anti-diffusion shield (320) is detachably connected to one end of the manifold body (310); The anti-spreading cover (320) has a large-diameter end and a small-diameter end. The large-diameter end is connected to the explosion-proof valve (200), and the small-diameter end is connected to the manifold body (310).

3. The battery cell according to claim 2, characterized in that, The one-way valve (400) is detachably disposed within the anti-diffusion cover (320).

4. The battery cell according to claim 2, characterized in that, The large-diameter end extends along the first direction and has a fixing part for connecting with the outer shell of the battery cell (100). The outer casing of the battery cell (100) is provided with a vent (110), which is configured to guide the medium escaping from the explosion-proof valve (200) to be discharged. The orthographic projection of the large-diameter end profile on the outer casing of the battery cell (100) can completely cover the opening area of ​​the vent (110).

5. The single cell according to claim 3, characterized in that, The anti-diffusion shield (320) also includes a connecting pipe (321), one end of which is connected to the small-diameter end of the anti-diffusion shield (320), and the other end of which is connected to the manifold pipe body (310). The outer periphery of the connecting pipe (321) is provided with one or more sealing rings, and the one-way valve (400) is detachably disposed inside the connecting pipe (321).

6. A battery module, characterized in that, Includes multiple individual battery cells (100) as described in any one of claims 1-5; The battery module also includes a main pipeline (500), and a plurality of manifolds (300) are respectively connected between the main pipeline (500) and the explosion-proof valve (200) of the corresponding battery cell (100).

7. The battery module according to claim 6, characterized in that, The manifold body (310) includes one or more bends (311), wherein the vertical distance from at least one bend (311) to the housing of the battery cell (100) is greater than the vertical distance from the main pipeline (500) to the housing of the battery cell (100).

8. The battery module according to claim 6, characterized in that, The outer peripheral wall of the main pipeline (500) is provided with a plurality of mutually spaced interfaces, each of which corresponds to and is connected to a plurality of manifolds (300), and the other end of each of the manifolds (300) corresponds to and is connected to a plurality of explosion-proof valves (200).

9. The battery module according to claim 6, characterized in that, The main pipeline includes a plurality of main pipeline bodies (510), and adjacent main pipeline bodies (510) are detachably connected by a connector (520), the connector (520) being connected to the corresponding manifold (300).

10. The battery module according to claim 6, characterized in that, The battery cell (100) further includes a positive electrode post (120) and a negative electrode post (130). Multiple battery cells (100) are arranged sequentially along the second direction. The battery module further includes multiple connecting bars (140), and the multiple connecting bars (140) are connected in series with multiple battery cells (100). The explosion-proof valve (200), the positive terminal (120), and the negative terminal (130) are all disposed on the top of the battery cell (100); The explosion-proof valve (200) is located between the positive terminal (120) and the negative terminal (130), and the main pipeline (500) passes between the positive terminal (120) and the negative terminal (130).

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