CN212810494U - Battery cover plate, battery and battery pack - Google Patents
Battery cover plate, battery and battery pack Download PDFInfo
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- CN212810494U CN212810494U CN202021622064.2U CN202021622064U CN212810494U CN 212810494 U CN212810494 U CN 212810494U CN 202021622064 U CN202021622064 U CN 202021622064U CN 212810494 U CN212810494 U CN 212810494U
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- cover plate
- explosion
- battery
- proof valve
- electrode terminal
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
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- Gas Exhaust Devices For Batteries (AREA)
Abstract
The utility model provides a battery cover plate, which comprises a cover plate body, an explosion-proof valve, an insulating block, an electrode terminal and a connecting sheet, wherein the explosion-proof valve comprises a fixed ring and a separating sheet, and the insulating block is covered above the explosion-proof valve; the electrode terminal is arranged on one side of the insulating block, which is far away from the explosion-proof valve; the connecting sheet is arranged in the insulating block, when the explosion-proof valve is not exploded, one end of the connecting sheet is connected with the separating sheet, and the other end of the connecting sheet penetrates through the insulating block and is connected with the electrode terminal; when the explosion-proof valve explodes, the separating sheet is separated from the fixing ring and pushes the connecting sheet to move towards the direction far away from the cover plate body, and then the electrode terminal is disconnected from being electrically connected with the cover plate body. The utility model also provides a battery and battery package. The utility model provides a battery cover plate is when explosion-proof valve blasting, and the separation piece separates and promotes the connection piece towards keeping away from apron body direction motion with the retainer plate, and then breaks off electrode terminal and is connected with apron body electricity, improves the security performance.
Description
Technical Field
The utility model relates to a battery technology field, concretely relates to battery apron, battery and battery package.
Background
With the continuous popularization of new energy automobiles, the use requirement of power batteries in the new energy automobiles becomes higher and higher. For a new energy electric automobile, the power supply performance, the stability and the safety performance of the power battery pack are critical indexes for measuring the performance of the automobile. The existing shell electrified battery is characterized in that a positive pole column is directly connected with an aluminum cover plate, and the aluminum cover plate is connected with a shell so as to achieve the purpose of electrifying the shell. The shell is charged with a battery, the explosion-proof valve is independently arranged on the aluminum cover plate, and when the battery is charged and generates abnormal gas, the valve is opened in time to release the internal gas, so that the safety performance of the battery is improved. Although the explosion-proof valve is opened, internal gas is released, and the safety performance of the battery is improved, the circuit between the positive pole and the aluminum cover plate is not disconnected, and the risk of thermal runaway of the battery still exists.
SUMMERY OF THE UTILITY MODEL
The present disclosure is directed to solving at least one of the problems in the prior art. To this end, in a first aspect of the present application, there is provided a battery cover plate comprising:
the cover plate comprises a cover plate body, wherein the cover plate body is provided with a vent hole;
the explosion-proof valve comprises a fixed ring and a separation sheet positioned in the fixed ring, the fixed ring is arranged on the periphery of the vent hole, and the separation sheet seals the vent hole;
the insulating block is covered above the explosion-proof valve;
the electrode terminal is arranged on one side, away from the explosion-proof valve, of the insulating block;
the connecting piece is arranged in the insulating block, one end of the connecting piece is connected with the separating piece when the explosion-proof valve is not exploded, and the other end of the connecting piece penetrates through the insulating block and is connected with the electrode terminal; when the explosion-proof valve explodes, the separation piece of the explosion-proof valve is separated from the fixing ring and pushes the connecting piece to move towards the direction far away from the cover plate body, and then the electrode terminal is disconnected from being electrically connected with the cover plate body.
In a preferred embodiment, the electrode terminal is in interference fit with the insulating block, and the electrode terminal can move towards a side away from the cover plate body relative to the insulating block when the explosion-proof valve explodes.
In a preferred embodiment, the connection piece includes a first bending section and a second bending section connected to each other, one end of the first bending section is connected to the separation piece, one end of the second bending section is connected to the electrode terminal, and centers of curvature of the first bending section and the second bending section are located at both sides of the connection piece, respectively.
In a preferred embodiment, the insulating block comprises a peripheral wall and a top wall arranged at one end of the peripheral wall far away from the explosion-proof valve, and the peripheral wall and the top wall form a containing cavity for containing the connecting sheet;
the top wall is provided with a first through hole and a second through hole, the second through hole and the first through hole are arranged at intervals, and the other end of the connecting sheet penetrates through the first through hole and is connected with the electrode terminal.
In a preferred embodiment, the peripheral wall is disposed around the outside of the explosion-proof valve, the top wall includes two insulating support members, the two insulating support members are disposed at an interval, a gap between the two insulating support members constitutes the first through hole, and a gap between the insulating support member and the peripheral wall constitutes the second through hole.
In a preferred embodiment, the insulating block is further provided with an installation part, a mounting boss is arranged on the position of the cover plate body corresponding to the installation part, and the installation part is connected with the mounting boss so that the insulating block is connected with the cover plate body.
In a preferred embodiment, the explosion-proof valve further comprises a thinning portion located between the fixing ring and the separation piece, and the thinning portion is cracked to separate the fixing ring from the separation piece when the explosion-proof valve is exploded.
In a preferred embodiment, the connecting piece is an aluminum connecting piece.
In a second aspect of the present application, there is provided a battery, wherein the battery comprises a battery case and a battery cover plate as described in any one of the above items at one end of the battery case.
In a third aspect of the present application, there is provided a battery pack including the battery as described above.
The utility model has the advantages that: the utility model provides a battery cover plate sets up electrode terminal on the insulating block to be connected and then with this body coupling of apron through connection piece and explosion-proof valve, when explosion-proof valve blasting, the separation piece of explosion-proof valve separates and promotes the connection piece and moves towards keeping away from apron body direction with the retainer plate, and then breaks off electrode terminal and is connected with apron body electricity, improves the security performance.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to these drawings without inventive labor.
Fig. 1 is a schematic structural diagram of a battery cover plate according to an embodiment of the present invention.
Fig. 2 is a partially enlarged view of fig. 1.
Fig. 3 is an exploded perspective view of fig. 2.
Fig. 4 is a cross-sectional view of a battery cover according to an embodiment of the present invention.
Fig. 5 is a schematic view of a connection structure between an electrode terminal, a connecting sheet and an explosion-proof valve according to an embodiment of the present invention.
Fig. 6 is a schematic structural view of an insulation block and a cover plate body according to an embodiment of the present invention.
Fig. 7 is a schematic structural diagram of an explosion-proof valve according to an embodiment of the present invention.
Fig. 8 is a schematic perspective view of a battery according to an embodiment of the present invention.
Detailed Description
The following description is of the preferred embodiments of the present invention, and it should be noted that, for those skilled in the art, a number of modifications and decorations can be made without departing from the principle of the present invention, and these modifications and decorations are also considered to be the protection scope of the present invention.
In the description of the present invention, it is to be understood that the terms "length," "width," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like are used in the orientation or positional relationship indicated in the drawings for convenience in describing the present invention and for simplicity in description, and are not intended to indicate or imply that the device or element so referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be construed as limiting the present invention.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically limited otherwise.
In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," and "fixed" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.
Referring to fig. 1 to 4, an embodiment of the present invention provides a battery cover plate 10, wherein the battery cover plate 10 is used for being connected with a battery shell 30 (as shown in fig. 8) for sealing a pole piece inside a battery.
Referring to fig. 2 and 3, the battery cover plate 10 includes a cover plate body 100, an explosion-proof valve 200, an insulating block 300, an electrode terminal 400, and a connecting sheet 500, wherein the cover plate body 100 is provided with a vent hole 110, and the vent hole 110 is used for communicating the inside of the battery with the outside; the explosion-proof valve 200 includes a fixing ring 210 and a separation sheet 220 (shown in fig. 4 and 7) located inside the fixing ring 210, the fixing ring 210 is disposed on the periphery side of the vent hole 110, and the separation sheet 220 closes the vent hole 110; the insulating block 300 is covered above the explosion-proof valve 200, the upper side refers to the outer side of the cover plate body 100, or the side of the battery cover plate 10 departing from the ground when the battery is placed on the ground, the insulating block 300 is covered above the explosion-proof valve 200, which means that a movable space is formed between the insulating block 300 and the explosion-proof valve 200, and the insulating block 300 is covered above the explosion-proof valve 200 like a cover; the electrode terminal 400 is arranged on one side of the insulating block 300 away from the explosion-proof valve 200, and the electrode terminal 400 can be a positive terminal or a negative terminal; connecting sheet 500 is disposed inside insulating block 300, one end of connecting sheet 500 is connected to separator 220, and the other end of connecting sheet 500 passes through insulating block 300 and is connected to electrode terminal 400; that is, when not exploded, the electrode terminal 400 is connected to the explosion-proof valve 200 through the connection piece 500 (as shown in fig. 5), and the explosion-proof valve 200 is connected to the cap body 100, so that the electrode terminal 400 is electrically connected to the cap body 100, and in this embodiment, the cap body 100 and the battery case 30 are electrically connected.
When the explosion-proof valve 200 is exploded, the separation piece 220 and the fixing ring 210 of the explosion-proof valve 200 are separated and push the connection piece 500 to move away from the cap body 100, thereby electrically disconnecting the electrode terminal 400 from the cap body 100.
The explosion of the explosion-proof valve 200 refers to the situation that when an acting force is applied from the side of the explosion-proof valve 200 back to the connecting piece 500 to the side of the explosion-proof valve 200 facing to the connecting piece 500, the separating piece 220 in the explosion-proof valve 200 is separated from the fixing ring 210; specifically, when the air pressure inside the battery is increased, the internal air pressure acts on the separation sheet 220, and the separation sheet 220 is separated from the fixing ring 210.
The utility model provides a battery apron 10 sets up electrode terminal 400 on insulating block 300 to be connected and then be connected with apron body 100 through connection piece 500 and explosion-proof valve 200, when explosion-proof valve 200 explodes, separation piece 220 and retainer plate 210 separation of explosion-proof valve 200 promote connection piece 500 towards keeping away from apron body 100 direction motion, thereby the electricity between disconnection electrode terminal 400 and the retainer plate 210 is connected, and then can break off the electricity between electrode terminal 400 and the apron body 100 completely and be connected, the security performance is improved.
In a further embodiment, the electrode terminal 400 is in interference fit with the insulating block 300, and the electrode terminal 400 can move relative to the insulating block 300 to a side away from the cover body 100 when the explosion-proof valve 200 explodes. The electrode terminal 400 and the insulating block 300 may be connected by a snap fit, and when the explosion-proof valve 200 explodes, the force applied by the inside of the battery pushes the separating sheet 220 to extrude toward the connecting sheet 500, and the connecting sheet 500 further pushes the electrode terminal 400 to move toward the side away from the cover plate body 100, in this embodiment, when the explosion-proof valve 200 explodes, the electrode terminal 400 is separated from the insulating block 300.
In a further embodiment, the connection piece 500 includes a first bending section 510 and a second bending section 520 (shown in fig. 3 and 5) connected to each other, one end of the first bending section 510 is connected to the separation piece 220, one end of the second bending section 520 is connected to the electrode terminal 400, and centers of curvature of the first bending section 510 and the second bending section 520 are located at both sides of the connection piece 220, respectively. The first and second curved sections 510, 520 are configured such that the connecting piece 500 is "S" shaped, and in other embodiments, the connecting piece 500 may include more curved sections, or may include two or more "S" shaped structures.
In a further embodiment, the connecting piece 500 is preferably a compressible connecting piece 500, and in particular, the connecting piece 500 is an aluminum connecting piece, and when the explosion-proof valve 200 is exploded, the aluminum connecting piece is compressed in a direction away from the cover plate body 100. In this embodiment, the aluminum connecting plate will not rebound after being compressed, or the aluminum connecting plate will maintain the compressed shape after being compressed, so that the separating plate 220 can be pulled above the vent hole 110 to be separated from the fixing ring 210.
In a further embodiment, the insulating block 300 includes a peripheral wall 310 and a top wall 320 (shown in fig. 3 and 4) disposed at an end of the explosion-proof valve 200 remote from the peripheral wall 310, the peripheral wall 310 and the top wall 320 forming a receiving cavity 330 for receiving the connecting piece 500; upon bursting of the explosion-proof valve 200, the connecting piece 500 can move within the receiving cavity 330. The top wall 320 is provided with a first through hole 340 and a second through hole 350, the second through hole 350 and the first through hole 340 are spaced apart, and the other end of the connecting piece 500 passes through the first through hole 340 and is connected to the electrode terminal 400. The first through hole 340 provides a space for the other end of the connection piece 500 to move, and when the explosion-proof valve 200 is exploded, the other end of the connection piece 500 may push the electrode terminal 400 outward in the first through hole 340.
In a further embodiment, the peripheral wall 310 is disposed around the outside of the explosion-proof valve 200, the top wall 320 includes two insulating supports 321 (shown in fig. 6), the two insulating supports 321 are disposed at intervals, a gap between the two insulating supports 321 constitutes a first through hole 340, and a gap between the insulating supports 321 and the peripheral wall 310 constitutes a second through hole 350. The electrode terminal 400 is in interference fit with the two insulating supports 321, or the electrode terminal 400 is in snap-fit connection with the two insulating supports 321.
In a further embodiment, a recess 322 is disposed on a surface of the two insulating supporting members 321 facing away from the cap body 100, and the electrode terminal 400 is disposed in the recess 322 and is in interference fit with the insulating supporting members 321.
Referring to fig. 3 again, in a further embodiment, the insulation block 300 is further provided with a mounting portion 360, a mounting boss 120 is provided on the cover plate body 100 at a position corresponding to the mounting portion 360, and the mounting portion 360 is connected to the mounting boss 120, so that the insulation block 300 is connected to the cover plate body 100. Specifically, be equipped with the installation through-hole on the installation department 360, installation boss 120 is connected with installation through-hole accessible interference fit, or modes such as accessible threaded connection, block connection are connected fixedly, can avoid explosion-proof valve 200 when the blasting, promote insulating block 300 and separate with apron body 100 together.
Referring to fig. 7, in a further embodiment, the explosion-proof valve 200 further includes a thinning portion 230, the thinning portion 230 is located between the fixing ring 210 and the separating piece 220, and when the explosion-proof valve 200 is exploded, the thinning portion 230 is ruptured to separate the fixing ring 210 from the separating piece 220. Wherein the thickness of the thinned portion 230 is smaller than the thickness of the separation sheet 200 and the fixing ring 210.
In a further embodiment, a support 130 (shown in fig. 3 and 4) is disposed in the vent 110, and the support 130 is connected to a sidewall of the vent 110. In this embodiment, the supporting frame 130 is preferably in a cross shape, and four ends of the supporting frame 130 in the cross shape are connected to the side walls of the ventilation holes 110. When the explosion-proof valve 200 is installed around the vent hole 110, a certain pressure is applied around the vent hole 100, which may deform the sidewall around the vent hole 110, and the support bracket 130 in this embodiment is used to provide a support function for the cover plate body 100 around the vent hole 110 when the explosion-proof valve 200 is installed on the cover plate body 100 around the vent hole 110, so as to prevent the cover plate body 100 around the vent hole 110 from being deformed when the explosion-proof valve 200 is installed.
In a further embodiment, the battery cover plate 10 further includes an insulating spacer 600 (shown in fig. 4), and the insulating spacer 600 is disposed on a side of the cover plate body 100 away from the insulating block 300. The insulating spacer 600 serves to isolate the electrical connection between the cap plate body 100 and the pole core located under the battery cap plate 100.
Referring to fig. 8, an embodiment of the present invention further provides a battery 20, where the battery 20 includes a battery case 30 and a battery cover plate 10 located at one end of the battery case 30 according to any one of the embodiments above. By adopting the battery cover plate 10, the electric connection between the electrode terminal 400 and the cover plate body 100 can be broken after the explosion-proof valve 200 is exploded when the internal temperature of the battery 20 is high or the pressure is overlarge, so that the safety performance is improved. In this embodiment, the battery case 20 is an aluminum case, the electrode terminal 400 of the explosion-proof valve 200 is a positive electrode terminal, and the other protrusion of the battery cover 10 is a negative electrode terminal 40.
An embodiment of the present invention further provides a battery pack, which includes the battery 20 as described above. The battery 20 having the above-described battery cap plate 10 is used, so that the battery pack is more safe.
The above-mentioned embodiments only represent some embodiments of the present invention, and the description thereof is specific and detailed, but not to be construed as limiting the scope of the present invention. It should be noted that, for those skilled in the art, without departing from the spirit of the present invention, several variations and modifications can be made, which are within the scope of the present invention. Therefore, the protection scope of the present invention should be subject to the appended claims.
Claims (10)
1. A battery cover plate, characterized in that the battery cover plate comprises:
the cover plate comprises a cover plate body, wherein the cover plate body is provided with a vent hole;
the explosion-proof valve comprises a fixed ring and a separation sheet positioned in the fixed ring, the fixed ring is arranged on the periphery of the vent hole, and the separation sheet seals the vent hole;
the insulating block is covered above the explosion-proof valve;
the electrode terminal is arranged on one side, away from the explosion-proof valve, of the insulating block;
the connecting piece is arranged in the insulating block, one end of the connecting piece is connected with the separating piece, and the other end of the connecting piece penetrates through the insulating block and is connected with the electrode terminal; when the explosion-proof valve explodes, the separation piece of the explosion-proof valve is separated from the fixing ring and pushes the connecting piece to move towards the direction far away from the cover plate body, and then the electrode terminal is disconnected from being electrically connected with the cover plate body.
2. The battery cover plate according to claim 1, wherein the electrode terminal is in interference fit with the insulating block, and the electrode terminal is movable relative to the insulating block to a side away from the cover plate body when the explosion-proof valve is exploded.
3. The battery cap plate according to claim 1, wherein the connection tab includes a first bent section and a second bent section connected to each other, one end of the first bent section is connected to the separator, one end of the second bent section is connected to the electrode terminal, and centers of curvature of the first bent section and the second bent section are located at both sides of the connection tab, respectively.
4. The battery cover plate according to claim 1, wherein the insulating block includes a peripheral wall and a top wall provided at an end of the peripheral wall remote from the explosion-proof valve, the peripheral wall and the top wall constituting a receiving cavity for receiving the connecting piece;
the top wall is provided with a first through hole and a second through hole, the second through hole and the first through hole are arranged at intervals, and the other end of the connecting sheet penetrates through the first through hole and is connected with the electrode terminal.
5. The battery cover plate according to claim 4, wherein the peripheral wall is provided around the outside of the explosion-proof valve, the top wall includes two insulating support members, the two insulating support members are provided at intervals, a gap between the two insulating support members constitutes the first through hole, and a gap between the insulating support member and the peripheral wall constitutes the second through hole.
6. The battery cover plate of claim 1, wherein the insulating block is further provided with a mounting portion, a mounting boss is provided on the cover plate body at a position corresponding to the mounting portion, and the mounting portion is connected with the mounting boss so that the insulating block is connected with the cover plate body.
7. The battery cover plate according to claim 1, wherein the explosion-proof valve further comprises a reduced thickness portion between the fixing ring and the separator, the reduced thickness portion being ruptured to separate the fixing ring from the separator when the explosion-proof valve is exploded.
8. The battery cover plate of claim 1, wherein the connecting tab is an aluminum connecting tab.
9. A battery comprising a battery housing and a battery cover plate according to any one of claims 1-8 at one end of the battery housing.
10. A battery pack, characterized in that the battery pack comprises the battery according to claim 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021622064.2U CN212810494U (en) | 2020-08-04 | 2020-08-04 | Battery cover plate, battery and battery pack |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021622064.2U CN212810494U (en) | 2020-08-04 | 2020-08-04 | Battery cover plate, battery and battery pack |
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| Publication Number | Publication Date |
|---|---|
| CN212810494U true CN212810494U (en) | 2021-03-26 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202021622064.2U Active CN212810494U (en) | 2020-08-04 | 2020-08-04 | Battery cover plate, battery and battery pack |
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| CN (1) | CN212810494U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2023088107A1 (en) * | 2021-11-19 | 2023-05-25 | 宁德时代新能源科技股份有限公司 | Anti-explosion valve, battery, and electric device |
-
2020
- 2020-08-04 CN CN202021622064.2U patent/CN212810494U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2023088107A1 (en) * | 2021-11-19 | 2023-05-25 | 宁德时代新能源科技股份有限公司 | Anti-explosion valve, battery, and electric device |
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