CN218867250U

CN218867250U - Battery cover plate and battery

Info

Publication number: CN218867250U
Application number: CN202320022744.8U
Authority: CN
Inventors: 陈海廷; 娄豫皖; 万生辉; 和祥运; 丁丽平; 王卡
Original assignee: Ningxia Baofeng Yuneng Technology Co Ltd
Current assignee: Ningxia Baofeng Yuneng Technology Co Ltd
Priority date: 2023-01-05
Filing date: 2023-01-05
Publication date: 2023-04-14
Anticipated expiration: 2033-01-05

Abstract

The utility model belongs to the technical field of the battery, a battery cover plate and battery are disclosed, this battery cover plate is including being used for shutoff battery case open-ended worn-out fur and independent terminal subassembly, independent terminal subassembly includes the layer board, cylinder manifold and terminal, the layer board is fixed on the worn-out fur, the cylinder manifold is fixed on the layer board, one side fixed connection that terminal and cylinder manifold deviate from the battery case, worn to locate worn-out fur by utmost point ear in the battery case, layer board and cylinder manifold, and deviate from one side fixed connection of battery case with the cylinder manifold, this battery cover plate has realized the effect of independent standardized production of terminal subassembly, and at battery case outside welded terminal and cylinder manifold, the effect of utmost point ear and cylinder manifold.

Description

Battery cover plate and battery

Technical Field

The utility model relates to a battery technology field especially relates to a battery cover plate and battery.

Background

As a driving energy source, a lithium ion battery has been widely used in new energy vehicles and various energy storage elements, and generally, the lithium ion battery includes a pole core, a battery case, and a cover plate, wherein the pole core is disposed in the battery case, and the cover plate is plugged at an opening of the battery case.

In the prior art, an output terminal is arranged on a cover plate, a connecting sheet is arranged in a battery case, the traditional processing technology is to preset an output terminal position on the cover plate, sleeve a sealing element and an insulating element on the outer ring of the output terminal, then seal and fix the output terminal on the cover plate, arrange the connecting sheet in the battery case and at an opening of the battery case, weld and fix a tab on a pole core and the connecting sheet, seal and block the cover plate at the opening of the battery case, and perform laser welding on the connecting sheet and the output terminal.

Above-mentioned structure makes the welding of connection piece and utmost point ear, and the welding of connection piece and output terminal all goes on in the battery case, the welding slag that produces in welding process will drop in the battery case, the welding slag in the battery case can improve the short circuit rate and the low pressure ratio of battery, greatly reduced the security and the reliability of battery, in addition, output terminal among the prior art is direct and apron fixed connection, and the opening of apron shutoff battery case, therefore, to the battery of different models size, need the design to produce the apron of different models size, output terminal, parts such as sealing member and insulating part, production efficiency is reduced and manufacturing cost has been improved.

Therefore, it is desirable to provide a battery cover plate and a battery to solve the above-mentioned problems.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a battery cover plate, this battery cover plate have realized the standardized production of independent terminal subassembly to can weld terminal and cylinder manifold in the outside of battery case, and weld utmost point ear and cylinder manifold in the outside of battery case.

To achieve the purpose, the utility model adopts the following technical proposal:

a battery cover plate comprising:

the light plate is used for plugging an opening of the battery shell;

independent terminal subassembly, independent terminal subassembly include layer board, cylinder manifold and terminal, and the layer board is fixed on the worn smooth board, and the cylinder manifold is fixed on the layer board, and terminal and one side fixed connection that the cylinder manifold deviates from the battery case, and utmost point ear in the battery case can wear to locate worn smooth board, layer board and cylinder manifold to deviate from one side fixed connection of battery case with the cylinder manifold.

Optionally, the bus bar is in insulating and sealing connection with the supporting plate.

Optionally, the independent terminal assembly further comprises an injection molded part, and the injection molded part is injection molded between the bus plate and the supporting plate.

Optionally, the outer surface of the bus bar is provided with a surface passivation layer.

Optionally, the outer surface of the carrier is provided with a surface passivation layer.

Optionally, the light panel is provided with a first through hole, a boss is arranged on the inner wall of the first through hole, and the edge of the supporting plate is fixed on the boss.

Optionally, a second through hole is formed in the supporting plate, and the bus bar is fixed to the inner wall of the second through hole.

Optionally, one side of the bus board, which is far away from the battery case, is provided with a fixing groove, the bottom of the fixing groove is provided with a third through hole, and the tab can penetrate through the third through hole and is fixedly connected with the bottom of the fixing groove.

Optionally, the bus bar is fixed on the end face of the support plate on the side away from the battery case.

Another object of the present invention is to provide a battery, which has a higher production efficiency and a lower production cost.

the battery comprises a pole core, a pole lug, a battery case and the battery cover plate, wherein the pole core is arranged in the battery case, the battery case is provided with an opening, the light plate is blocked at the opening, one end of the lug is connected with the pole core, and the other end of the lug is penetrated and arranged on the light plate, the supporting plate and the bus plate and is fixedly connected with one side of the bus plate deviating from the battery shell.

Has the advantages that:

the utility model provides a battery cover plate assembles layer board, cylinder manifold and terminal into independent terminal subassembly, and independent terminal subassembly passes through the layer board to be fixed on the worn-out fur, blocks up the worn-out fur in the opening of battery case, when producing the battery of different models size, only need to change worn-out fur of different models size, and independent terminal subassembly need not to be changed, has realized the standardized production of independent terminal subassembly, has reduced the work load of design battery, has still improved the production efficiency of battery, has reduced manufacturing cost; in addition, this battery apron is integrated in the independent terminal subassembly with the cylinder manifold, and the opening at the battery case is sealed through the worn-out fur to independent terminal subassembly, and terminal and utmost point ear all deviate from one side fixed connection of battery case with the cylinder manifold, and then realized in the outside of battery case to terminal and cylinder manifold welding, utmost point ear and cylinder manifold welded effect, avoided the welding slag to drop the problem in the battery case, reduced battery short-circuit rate and low pressure ratio by a wide margin, have the effect that improves battery security and reliability.

Drawings

FIG. 1 is a schematic structural diagram of a battery cover plate according to an embodiment;

FIG. 2 is a schematic diagram of an exploded structure of a battery cover plate according to an embodiment;

FIG. 3 is a schematic diagram illustrating an exploded view of a separate terminal assembly according to one embodiment;

FIG. 4 is a schematic view of an assembly structure of the optical plate, the supporting plate and the injection molded part according to the first embodiment;

FIG. 5 is a schematic structural diagram of a light panel provided in accordance with an embodiment;

FIG. 6 is a schematic structural diagram of a pallet according to an embodiment;

FIG. 7 is a schematic structural diagram of a bus bar according to an embodiment;

FIG. 8 is a schematic structural view of an injection molded part provided in accordance with a first embodiment;

fig. 9 is an exploded view of a separate terminal assembly according to a second embodiment;

fig. 10 is an assembly structure diagram of the light plate, the supporting plate, the injection-molded part and the bus plate provided by the second embodiment.

In the figure:

100. a light panel; 110. a first through hole; 111. a boss; 120. a liquid injection hole; 130. an explosion-proof valve; 200. an independent terminal assembly; 210. a support plate; 211. a second through hole; 220. a bus bar; 221. fixing grooves; 222. a third through hole; 230. a terminal; 240. an injection molded part; 241. and a fourth via.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting of the invention. It should be further noted that, for the convenience of description, only some of the structures related to the present invention are shown in the drawings, not all of the structures.

In the description of the present invention, unless otherwise explicitly specified or limited, the terms "connected", "connected" and "fixed" are to be construed broadly, e.g., as being fixedly connected, detachably connected, or integrated; 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 as the case may be, by those of ordinary skill in the art.

In the present application, unless expressly stated or limited otherwise, the recitation of a first feature "on" or "under" a second feature may include the recitation of the first and second features being in direct contact, and may also include the recitation of the first and second features not being in direct contact, but being in contact with another feature between them. Also, the first feature "on," "above" and "over" the second feature may include the first feature being directly above and obliquely above the second feature, or simply indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.

In the description of the present embodiment, the terms "upper", "lower", "right", etc. are used in an orientation or positional relationship based on that shown in the drawings only for convenience of description and simplicity of operation, and do not indicate or imply that the device or element 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" and "second" are used only for descriptive purposes and are not intended to have a special meaning.

Example one

The present embodiment provides a battery cover plate that realizes standardized production of independent terminal assemblies and is capable of welding terminals and bus plates at the outside of a battery case and welding tabs and bus plates at the outside of the battery case.

Specifically, as shown in fig. 1 to 4, the battery cover plate includes a light plate 100 and an independent terminal assembly 200, the light plate 100 is used for sealing an opening of a battery case (not shown in the drawings), the independent terminal assembly 200 includes a supporting plate 210, a bus bar 220 and a terminal 230, the supporting plate 210 is fixed on the light plate 100, the bus bar 220 is fixed on the supporting plate 210, the terminal 230 is fixedly connected with one side of the bus bar 220 away from the battery case, and a tab (not shown in the drawings) in the battery case can penetrate through the light plate 100, the supporting plate 210 and the bus bar 220 and is fixedly connected with one side of the bus bar 220 away from the battery case, so that the terminal 230 and the tab are electrically connected through the bus bar 220.

According to the battery cover plate, the supporting plate 210, the bus board 220 and the terminals 230 are assembled into the independent terminal assembly 200, the independent terminal assembly 200 is fixed on the light plate 100 through the supporting plate 210, and the opening of a battery case is sealed by the light plate 100, when batteries with different types and sizes are produced, only the light plates 100 with different types and sizes are required to be replaced, and the independent terminal assembly 200 does not need to be replaced, so that the standardized production of the independent terminal assembly 200 is realized, the workload for designing the batteries is reduced, the production efficiency of the batteries is also improved, and the production cost is reduced; in addition, this battery cover plate has integrated the cylinder manifold 220 in independent terminal subassembly 200, and independent terminal subassembly 200 passes through smooth board 100 shutoff at the opening of battery case, and terminal 230 and utmost point ear all deviate from one side fixed connection of battery case with cylinder manifold 220, and then realized in the outside of battery case to terminal 230 and cylinder manifold 220 welding, utmost point ear and cylinder manifold 220 welded effect, the problem of welding slag dropping in the battery case has been avoided, battery short-circuit rate and low pressure ratio have been reduced by a wide margin, have the effect that improves battery security and reliability.

Further, the bus plate 220 is insulation-sealed from the tray 210 to achieve sealing of the individual terminal assemblies 200 and insulation between the terminals 230 and the tray 210.

Preferably, as shown in fig. 1 to 4, the individual terminal assembly 200 further includes an injection molded part 240, and the injection molded part 240 is injection molded between the bus plate 220 and the supporting plate 210 to achieve the insulation sealing connection of the bus plate 220 and the supporting plate 210. In the prior art, the sealing connection between the output terminal 230 and the cover plate is usually realized by screwing or riveting and compressing a nut, the sealing connection forms a sealing point at the screwing position or the riveting and compressing position of the nut, and the sealing point is easy to loosen in the processes of transportation, vibration, charging and discharging of the battery, thereby causing the failure of the sealing connection between the output terminal 230 and the cover plate, in order to reduce the probability of the sealing failure, the number of the sealing points needs to be reduced as much as possible, in the prior art, the number of the sealing points is often reduced by reducing the cross-sectional area of the output terminal 230, however, when a battery module is formed, the connecting bar needs to be welded with the output terminal 230, and the undersize of the cross-sectional area of the output terminal 230 is not beneficial to the welding of the connecting bar and the output terminal 230, and is also not beneficial to the subsequent use of the battery product. In the technical scheme provided by this embodiment, the insulating and sealing connection between the bus board 220 and the supporting plate 210 is realized by injection molding of the injection molding piece 240 between the bus board 220 and the supporting plate 210, that is, the sealing of the independent terminal assembly 200 and the insulation between the terminal 230 and the supporting plate 210, the screwing or riveting compression of a nut between the terminal 230 and the supporting plate 210 is omitted, and further, the problem of reducing the cross-sectional area of the terminal 230 due to the reduction of sealing points is avoided, so that the cross-sectional area of the terminal 230 can be increased according to the use requirement and the production requirement, the welding between the connecting bar and the terminal 230 is facilitated, and the subsequent use of a battery product is also facilitated. It can be understood that the injection molding process may be a common injection molding process or a nano injection molding process, and is determined according to the use requirement.

Further, in the production process, carry out surface passivation to the cylinder manifold 220 for the surface of cylinder manifold 220 forms the surface passivation layer, with the cohesion that improves cylinder manifold 220 and injection molding 240, and then improves the leakproofness between cylinder manifold 220 and the layer board 210, and insulating reliability.

Further, in the production process, the supporting plate 210 is subjected to surface passivation treatment, so that a surface passivation layer is formed on the outer surface of the supporting plate 210, the bonding force between the supporting plate 210 and the injection molded part 240 is improved, and the sealing performance and the insulation reliability between the bus plate 220 and the supporting plate 210 are further improved.

Optionally, as shown in fig. 1 to 8, a fixing groove 221 is provided on one side of the bus bar 220 facing away from the battery case, the direction of the notch of the fixing groove 221 is the same as the direction of the opening of the battery case, a third through hole 222 is provided at the bottom of the fixing groove 221, and after the tab passes through the third through hole 222, the tab is bent by 90 degrees and welded at the bottom of the fixing groove 221, thereby fixedly connecting the tab to the side of the bus bar 220 facing away from the battery case.

Further, as shown in fig. 1 to 8, the terminal 230 blocks the notch of the fixing groove 221, and is fixedly connected to the edge of the fixing groove 221 in a sealing manner by peripheral laser welding, so as to protect the tab in the fixing groove 221.

Optionally, as shown in fig. 1 to 8, the light panel 100 is provided with a first through hole 110, a boss 111 is provided on an inner wall of the first through hole 110, and an edge of the supporting plate 210 is fixed on the boss 111 by welding or riveting, so as to realize the fixed connection between the supporting plate 210 and the light panel 100.

Further, the boss 111 extends toward the center of the first through hole 110, and the boss 111 extends in a closed loop along the circumferential direction of the first through hole 110, so as to improve the reliability and stability of the fixed connection between the support plate 210 and the boss 111.

Further, as shown in fig. 1 to 8, a second through hole 211 is formed in the supporting plate 210, and a fourth through hole 241 is formed in the injection molding member 240, so that the tab can pass through the first through hole 110, the second through hole 211, the fourth through hole 241, and the third through hole 222, and is welded and fixed to the groove bottom of the fixing groove 221.

Alternatively, as shown in fig. 1 to 8, the bus plate 220 is fixed to the end face of the support plate 210 facing away from the battery case by an injection molded part 240.

Optionally, as shown in fig. 1 to 8, the light panel 100 is further provided with a liquid injection hole 120 and an explosion-proof valve 130, the electrolyte can be injected into the battery case through the liquid injection hole 120, and when the air pressure in the battery case is higher, the explosion-proof valve 130 is opened to discharge the high-pressure gas in the battery case.

The battery cover plate provided in this embodiment is applied to a square battery, as shown in fig. 1 to 8, the number of the independent terminal assemblies 200 is two, one of the two independent terminal assemblies 200 is a positive independent terminal assembly, and the other is a negative independent terminal assembly.

Further, the positive independent terminal assembly comprises a positive supporting plate, a positive injection molding piece, a positive bus bar and a positive terminal, the positive supporting plate, the positive bus bar and the positive terminal are preferably made of aluminum alloy materials, the negative independent terminal assembly comprises a negative supporting plate, a negative injection molding piece, a negative bus bar and a negative terminal, the materials of the negative bus bar and the negative terminal are related to the type of the battery, illustratively, if the battery is a lithium titanate battery or a sodium ion battery, the negative bus bar and the negative terminal are both made of aluminum alloy materials, if the battery is a lithium ion battery, the negative bus bar is made of one of copper, nickel, stainless steel and nickel-plated carbon steel, correspondingly, the negative terminal can be made of one of copper, nickel, stainless steel and nickel-plated carbon steel, or a copper-aluminum composite material, and one side far away from the battery shell is made of aluminum materials.

The battery cover plate provided by the embodiment has a simple structure, can increase the cross-sectional area of the terminal 230 according to the use requirement and the production requirement, and further realizes the standardized production of the independent terminal assembly 200, so that the welding of the terminal 230 and the bus bar 220 and the welding of the lug and the bus bar 220 can be realized at the outer side of the battery case when the battery is produced, and the battery cover plate is suitable for being widely popularized and used.

The embodiment also provides a battery, and this battery includes utmost point core, utmost point ear, battery case and foretell battery apron, and utmost point core setting is in the battery case, and the battery case is equipped with the opening, and the shutoff of worn to establish worn to the other end of utmost point ear smooth plate 100, layer board 210 and cylinder manifold 220 in the opening, and the one side fixed connection who deviates from the battery case with cylinder manifold 220.

The battery that this embodiment provided adopts the opening of the worn-out fur 100 shutoff battery case among the above-mentioned battery apron, when producing the battery of different model sizes, only need change the worn-out fur 100 of different model sizes can to, can weld busbar 220 and terminal 230 in the outside of battery case, weld utmost point ear and busbar 220, reduced battery short circuit rate and low pressure ratio by a wide margin, make this battery have higher security and reliability.

Optionally, above-mentioned utmost point ear includes utmost point ear body and switching piece, utmost point ear body and the end connection of utmost point core, and utmost point ear body is located the battery case, the one end and the utmost point ear body coupling of switching piece, worn to establish bare board 100 by the other end of switching piece, layer board 210 and cylinder manifold 220, and deviate from one side fixed connection of battery case with cylinder manifold 220, the setting up of switching piece makes utmost point ear body can be located the battery case, fine guard action has been played to utmost point ear body, of course, in other embodiments, the switching piece also can be saved, directly make utmost point ear body wear to establish bare board 100, layer board 210 and cylinder manifold 220, and deviate from one side fixed connection of battery case with cylinder manifold 220, need and the production demand according to the in-service use decide.

Example two

The present embodiment provides a battery cover plate, which is different from the battery cover plate provided in the first embodiment in that:

as shown in fig. 9 and 10, in the present embodiment, the cross-sectional area of the second through hole 211 is larger than the cross-sectional area of the bus bar plate 220, so that the bus bar plate 220 can be fixed on the inner wall of the second through hole 211 by using an injection molding member 240, and a structure in which the bus bar plate 220 is embedded in the second through hole 211 is formed, so as to reduce the height size of the independent terminal assembly 200, further reduce the overall height size of the battery cover plate and the battery, and have the effect of improving the volumetric energy density of the battery.

The remaining structure of the battery cover plate provided in this embodiment is the same as that of the first embodiment, and is not described again.

It is to be understood that the above-described embodiments of the present invention are merely examples for clearly illustrating the present invention and are not intended to limit the embodiments of the present invention. Numerous obvious variations, rearrangements and substitutions will now occur to those skilled in the art without departing from the scope of the invention. And are neither required nor exhaustive of all embodiments. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the protection scope of the claims of the present invention.

Claims

1. Battery apron, its characterized in that includes:

the light plate (100), the light plate (100) is used for sealing the opening of the battery shell;

the independent terminal assembly (200) comprises a supporting plate (210), a bus board (220) and terminals (230), the supporting plate (210) is fixed on the light plate (100), the bus board (220) is fixed on the supporting plate (210), the terminals (230) are fixedly connected with one side, away from the battery case, of the bus board (220), and tabs in the battery case can penetrate through the light plate (100), the supporting plate (210) and the bus board (220) and are fixedly connected with one side, away from the battery case, of the bus board (220).

2. The battery cover plate according to claim 1, wherein the bus bar (220) is connected with the support plate (210) in an insulation sealing manner.

3. The battery cover plate of claim 2, wherein the individual terminal assembly (200) further comprises an injection molded piece (240), the injection molded piece (240) being injection molded between the bus plate (220) and the carrier plate (210).

4. The battery cover plate according to claim 3, wherein the outer surface of the bus plate (220) is provided with a surface passivation layer.

5. The battery cover plate according to claim 3, wherein the outer surface of the support plate (210) is provided with a surface passivation layer.

6. The battery cover plate according to any one of claims 1 to 5, wherein the optical plate (100) is provided with a first through hole (110), a boss (111) is provided on an inner wall of the first through hole (110), and an edge of the support plate (210) is fixed on the boss (111).

7. The battery cover plate according to any one of claims 1 to 5, wherein the support plate (210) is provided with a second through hole (211), and the bus bar (220) is fixed to an inner wall of the second through hole (211).

8. The battery cover plate according to any one of claims 1 to 5, wherein a side of the bus bar (220) facing away from the battery case is provided with a fixing groove (221), a groove bottom of the fixing groove (221) is provided with a third through hole (222), and the tab can pass through the third through hole (222) and is fixedly connected with the groove bottom of the fixing groove (221).

9. The battery cover plate according to any one of claims 1 to 5, characterized in that the bus bar (220) is fixed to the end face of the support plate (210) on the side facing away from the battery case.

10. The battery is characterized by comprising a pole core, a pole lug, a battery case and the battery cover plate according to any one of claims 1 to 9, wherein the pole core is arranged in the battery case, the battery case is provided with an opening, the light plate (100) is sealed and plugged in the opening, one end of the pole lug is connected with the pole core, and the other end of the pole lug penetrates through the light plate (100), the supporting plate (210) and the bus plate (220) and is fixedly connected with one side of the bus plate (220) away from the battery case.