A battery cover and a battery
Patent Information
- Application Number
- TW114213864
- Authority / Receiving Office
- TW · TW
- Patent Type
- Utility models
- Current Assignee / Owner
- Priority Date
- 2025-12-12
- Filing Date
- 2025-12-30
- Publication Date
- 2026-09-11
- Estimated Expiration
- 2035-12-29
Smart Images
Figure 00000000_0000_ABST
Abstract
Claims
1. A battery cover, comprising: A metal plate (1); a plastic plate (2) connected to the metal plate (1) and provided with a through vent (102). And an explosion-proof module (8), the explosion-proof module (8) includes: an explosion-proof structure (82) protruding from the side of the metal plate (1) away from the plastic plate (2) and having a through explosion-proof hole (81), the explosion-proof hole (81) being correspondingly provided with the vent hole (102); and an explosion-proof valve (10) placed in the explosion-proof hole (81) and sealed to the explosion-proof structure (82).
2. The battery cover as claimed in claim 1, wherein the explosion-proof structure (82) includes a protrusion formed on the metal plate (1), the protrusion being recessed on the side facing the plastic plate (2) and protruding on the side away from the plastic plate (2).
3. The battery cover as claimed in claim 1, wherein the outer end face of the explosion-proof hole (81) facing the vent hole (102) is provided with a groove, and the explosion-proof valve (10) is placed in the groove; a patch (9) is provided on the side of the explosion-proof hole (81) away from the vent hole (102), and the patch (9) covers the explosion-proof hole (81).
4. The battery cover as described in claim 1, wherein a stop frame (101) is provided on the plastic plate (2) at a position corresponding to the explosion-proof module (8), the stop frame (101) is provided with the vent hole (102), the vent hole connecting the side of the stop frame (101) facing the explosion-proof valve (10) and the side of the stop frame (101) facing away from the explosion-proof valve (10).
5. The battery cover as claimed in claim 1, wherein the wall thickness of the explosion-proof structure (82) is less than or equal to the wall thickness of the metal plate (1), or the wall thickness of the explosion-proof structure (82) is 1.5 mm to 3 mm.
6. The battery cover as described in any one of claims 1 to 5, wherein the metal plate (1) is provided with an injection hole (19), the plastic plate (2) is provided with a buffer groove (14) and a liquid passage hole (15), the opening of the buffer groove (14) is opposite to the injection hole (19), a cavity (16) is provided between the plastic plate (2) and the metal plate (1), the side of the plastic plate (2) facing away from the injection hole (19) is connected to the cavity (16) through the liquid passage hole (15), and the cavity (16) is connected to the buffer groove (14).
7. The battery cover as claimed in claim 6, wherein a sealing element (13) is sealed inside the injection hole (19), a metal sheet (11) is sealed at one end of the injection hole (19) facing away from the buffer groove (14), the buffer groove (14) is spaced apart from the injection hole (19), and the cavity (16) is connected to the buffer groove (14) through the gap between the buffer groove (14) and the injection hole (19).
8. The battery cover as described in claim 7, wherein a liquid storage tank (12) is provided on the side of the metal plate (1) facing away from the buffer groove (14), the liquid injection hole (19) is provided on the bottom wall of the liquid storage tank (12), and the metal sheet (11) is sealed and installed in the liquid storage tank (12).
9. A battery, comprising: Battery cover as described in any one of claims 1 to 8; The cell assembly is located on the side of the plastic plate (2) facing away from the metal plate (1); the second connecting piece (721) of the cathode and the second connecting piece (722) of the anode are located on the side of the plastic plate (2) facing away from the metal plate (1) and are electrically connected to the cathode tab (711) and the anode tab (712) of the cell assembly, respectively; the cell assembly is placed in the cavity of the housing assembly with one end open, the battery cover is installed on the opening of the housing assembly, and the plastic plate (2) is located on the side of the metal plate (1) facing the inside of the housing assembly.
10. The battery as claimed in claim 9: The battery cell assembly includes one set and is disposed at one end of the plastic plate (2) on the side of the plastic plate (2) away from the metal plate (1); or the battery cell assembly includes two sets and is disposed at opposite ends of the plastic plate (2) on the side of the plastic plate (2) away from the metal plate (1), wherein the cathode tabs (711) of both sets of the battery cell assembly are electrically connected to the second connecting piece (721) of the cathode, and the anode tabs (712) of both sets of the battery cell assembly are electrically connected to the second connecting piece (722) of the anode.
11. The battery as claimed in claim 10, each battery cell assembly includes at least two winding cores (3).
12. The battery as described in any one of claims 9 to 11, wherein the housing assembly comprises: A housing (5) with one end open, the battery cell assembly is disposed in the cavity of the housing (5); and an inner insulating film (4) is disposed between the battery cell assembly and the housing (5) and is sealed to the plastic plate (2), the vent (102) is connected to the space between the plastic plate (2) and the battery cell assembly, and the liquid passage is connected to the space between the plastic plate (2) and the battery cell assembly.
13. The battery as claimed in claim 12, wherein the wall thickness ratio of the sidewall, endwall and bottomwall of the housing (5) is from 0.7:0.5:1 to 1.2.