CN217009368U - Battery cover plate and battery - Google Patents
Battery cover plate and battery Download PDFInfo
- Publication number
- CN217009368U CN217009368U CN202220237643.8U CN202220237643U CN217009368U CN 217009368 U CN217009368 U CN 217009368U CN 202220237643 U CN202220237643 U CN 202220237643U CN 217009368 U CN217009368 U CN 217009368U
- Authority
- CN
- China
- Prior art keywords
- pole
- cover plate
- battery cover
- injection molding
- welding ring
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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- 238000001746 injection moulding Methods 0.000 claims abstract description 63
- 238000003466 welding Methods 0.000 claims abstract description 53
- 238000007789 sealing Methods 0.000 claims abstract description 30
- 238000003825 pressing Methods 0.000 claims abstract description 3
- 238000002347 injection Methods 0.000 claims 1
- 239000007924 injection Substances 0.000 claims 1
- 239000000243 solution Substances 0.000 description 6
- 229910052751 metal Inorganic materials 0.000 description 5
- 239000002184 metal Substances 0.000 description 5
- 238000000034 method Methods 0.000 description 5
- 239000002131 composite material Substances 0.000 description 4
- 229910000838 Al alloy Inorganic materials 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical group [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 2
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 description 2
- 239000002390 adhesive tape Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000005219 brazing Methods 0.000 description 2
- 229910052802 copper Inorganic materials 0.000 description 2
- 239000010949 copper Substances 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 229910001416 lithium ion Inorganic materials 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 230000001681 protective effect Effects 0.000 description 2
- 229910000679 solder Inorganic materials 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000003670 easy-to-clean Effects 0.000 description 1
- 238000004146 energy storage Methods 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 239000012212 insulator Substances 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 230000001960 triggered effect Effects 0.000 description 1
Images
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- Connection Of Batteries Or Terminals (AREA)
- Gas Exhaust Devices For Batteries (AREA)
Abstract
The utility model provides a battery cover plate and a battery, wherein the battery cover plate comprises a cover body inserted with a pole, the pole is sleeved with a welding ring, the welding ring is arranged around the edge of the pole in a pressing manner, and an insulating ring is sleeved at the joint of the welding ring and the pole; the periphery of the welding ring is provided with at least one opening, an injection molding piece is sleeved on the periphery of the welding ring, and an embedded structure embedded into the opening is arranged on the surface of the injection molding piece, which is in contact with the welding ring; the utility model discloses a plastic structure under the lid is kept away from a lateral surface of utmost point post, the lid is provided with down the plastic structure, the lower surface of utmost point post is protruding structure, protruding structure passes the lid stretches into but does not run through the through-hole of plastic structure down, the distance that the protruding structure stretched into down the plastic structure is 0.1 ~ 1 mm. The utility model avoids the influence of high temperature and high pressure on the pole in the injection molding process, and improves the sealing performance, the structural strength and the safety performance of the battery cover plate.
Description
Technical Field
The utility model belongs to the technical field of batteries, and relates to a battery cover plate and a battery.
Background
At present, the lithium ion power battery is widely applied to the fields of computers, mobile phones and the like due to the advantages of high energy density, high power density, multiple recycling times, long storage time and the like, has a wide application prospect in electric vehicles such as electric bicycles, electric automobiles and the like and energy storage facilities along with the maturity of manufacturing technology, and can effectively solve the problems of environmental pollution, energy crisis and the like due to the wide application of the power battery.
The power battery top cover applied in the market at present usually comprises: the top cover plate is provided with two mounting holes, the positive pole column and the negative pole column are arranged in the mounting holes in a penetrating mode, the positive conductive injection molding piece on the periphery of the positive pole column is sleeved, the negative insulating injection molding piece on the periphery of the negative pole column is sleeved, and the injection molding piece is directly connected with the sealing ring.
CN208806273U discloses a lithium ion power battery cover plate and a battery thereof, which comprises a cover plate base body, wherein the cover plate base body is provided with two poles and an explosion-proof valve triggered when the pressure in a battery case reaches a first set value, the outer sides of the poles are sleeved with injection molding pieces, the poles and the cover plate base body are connected through the injection molding pieces, and the inner walls of the poles and the injection molding pieces are provided with first clamping structures for preventing the poles from twisting; injection molding bottom and apron base member are equipped with the third joint structure that prevents apron base member and the relative axial motion of injection molding second joint structure and apron base member that prevents apron base member and injection molding. Through the joint structure of injection molding and utmost point post and apron base member, can guarantee to bear big moment of torsion when apron threaded connection, and make utmost point post structure not destroyed, prevent that the battery from taking place the danger of leaking.
CN209766485U discloses a secondary cell top cap structure, including the lamina tecti, the lamina tecti runs through and is provided with utmost point post hole, utmost point post hole includes anodal post hole and negative pole post hole, all be provided with utmost point post subassembly on the utmost point post hole, utmost point post subassembly includes utmost point post, the sealing washer, go up injection molding, the connecting piece includes the connecting piece outer lane, the connecting piece inner circle is cavity setting, the connecting piece inner circle is located utmost point post downthehole, the sealing washer is connected with lamina tecti fixed surface, utmost point post includes that utmost point post is protruding, utmost point post outer lane, utmost point post arch passes the sealing washer and cooperatees with the connecting piece inner circle, clearance between utmost point post outer lane and the lamina tecti is provided with injection molding, the lamina tecti lower surface is provided with injection molding. The utility model discloses a secondary battery top cap simple structure, utmost point post and lamina tecti just can realize fixing through welded connection spare, and manufacturing process is simple, and greatly reduced the height of top cap utmost point post, improve the battery inner space.
Therefore, how to provide a battery cover plate avoids the high temperature and high pressure in the injection molding process of the injection molding part from influencing the pole column, and improves the sealing property and the structural strength, which becomes the technical problem to be solved urgently at present.
SUMMERY OF THE UTILITY MODEL
Aiming at the defects in the prior art, the utility model aims to provide a battery cover plate and a battery, wherein an opening structure is arranged on a welding ring, an injection molding part is arranged between the welding ring and a pole column by filling the opening position of the welding ring, an insulating part is arranged between the welding ring and the pole column, the influence of high temperature and high pressure on the pole column in the injection molding process is avoided, the sealing performance and the structural strength of the battery cover plate are improved, further, the distance between the pole column and a lower plastic structure is controlled by arranging a protruding structure, and welding metal scraps are easy to clean.
In order to achieve the purpose, the utility model adopts the following technical scheme:
in a first aspect, the utility model provides a battery cover plate, which comprises a cover body inserted with a pole, wherein a welding ring is sleeved on the pole, the welding ring is arranged around the edge of the pole in a pressing manner, and an insulating ring is sleeved at the joint of the welding ring and the pole.
At least one opening is arranged in the circumferential direction of the welding ring, an injection molding piece is sleeved on the periphery of the welding ring, and an embedding structure embedded into the opening is arranged on the surface of the injection molding piece, which is in contact with the welding ring.
The lid is kept away from a side surface of utmost point post and is provided with down the plastic structure, the lower surface of utmost point post is protruding structure, protruding structure passes the lid stretches into but does not run through the through-hole of plastic structure down, the distance that protruding structure stretches into down the plastic structure is 0.1 ~ 1mm, is 0.1mm, 0.2mm, 0.3mm, 0.4mm, 0.5mm, 0.6mm, 0.7mm, 0.8mm, 0.9mm or 1.0mm for example.
The welding ring, the insulating part and the injection molding part are arranged, so that the injection molding part is prevented from contacting the pole, the injection molding part cannot directly act on the pole in the injection molding process of the injection molding part, the pole is prevented from being influenced by high temperature and high pressure in the injection molding process, the influence of a connecting part with the pole is further reduced, and the sealing performance and the structural strength of the battery cover plate are improved; in addition, this application is protruding structure through being the setting of utmost point post lower surface, when connection piece and utmost point post welding, clears up the metal fillings more easily, reduces the circuit risk of electric core.
It should be noted that, in the present invention, the lower plastic structure is connected to the cover plate by means of adhesive tape or ultrasonic welding.
It should be noted that the protruding structure of the pole in the utility model can be an integrated structure with the pole or a split structure, and those skilled in the art can reasonably set the protruding structure according to design requirements.
As a preferred technical solution of the present invention, the welding ring includes a main body portion and an extension portion, the main body portion is connected to the cover body, the extension portion surrounds and presses the edge of the pole, and the opening is opened in the extension portion.
As a preferable technical scheme of the utility model, the edge of the pole is in a step shape, and the welding ring is pressed on the step edge of the pole.
In a preferred embodiment of the utility model, the injection-molded part covers the weld ring all around.
As a preferable technical scheme of the utility model, the cover body is provided with a mounting hole, and the pole is arranged in the mounting hole.
It should be noted that the periphery of the mounting hole in the utility model may or may not adopt a convex hull structure, and the structural strength of the top cover plate can be enhanced by adopting the convex hull structure, but the existence of the convex hull structure can increase the height of the pole, which is not beneficial to improving the utilization rate of the internal space of the battery and the energy density of the battery.
The edge of mounting hole has seted up the mounting groove, the main part set up in the mounting groove.
The battery cover plate is of a structure without convex hulls by arranging the mounting groove, and the height of the pole can be effectively reduced, so that the energy density of the secondary battery is improved.
As a preferred technical solution of the present invention, a sealing ring is disposed between the pole and the cover body.
As a preferred technical solution of the present invention, the cover body is provided with a sealing groove, and the sealing ring is disposed in the sealing groove.
As a preferred technical solution of the present invention, the cover body is provided with an explosion-proof valve.
It should be noted that the explosion-proof valve is arranged in the through hole of the explosion-proof valve arranged on the cover plate, and the explosion-proof valve comprises a rupture disk and a protective film.
As a preferred technical solution of the present invention, the pole includes a positive pole and a negative pole. The positive pole column is provided with a positive pole injection molding piece, the positive pole injection molding piece has a resistance value, the negative pole column is provided with a negative pole injection molding piece, and the negative pole injection molding piece is insulated. Preferably, the negative pole is a composite pole, and it should be noted that in the composite pole of the present invention, the upper half part of the pole is aluminum alloy, the lower half part of the pole is copper simple substance, and the two parts are welded together by brazing or friction welding process.
Exemplarily, an assembling method of the battery cover plate is provided, which specifically includes the following steps:
installing a pole column into the installation hole, respectively sleeving the insulating part and the welding ring on the edge of the pole column, welding the main body part on the cover body, installing the sealing ring into the sealing groove, compressing the sealing ring through a clamp, performing injection molding on the periphery of the welding ring to form an injection molding part, connecting the cover body, the pole column and the welding ring, and assembling to obtain the battery cover plate, wherein the assembling method is suitable for both the positive pole column and the negative pole column.
In a second aspect, the present invention provides a battery, where the battery includes a battery core, a casing, and a battery cover plate, the battery core is disposed in the casing, the battery cover plate is covered at an opening of the casing, and the battery cover plate includes the battery cover plate of the first aspect.
The recitation of numerical ranges herein includes not only the above-recited numerical values, but also any numerical values between non-recited numerical ranges, and is not intended to be exhaustive or to limit the utility model to the precise numerical values encompassed within the range for brevity and clarity.
Compared with the prior art, the utility model has the beneficial effects that:
according to the utility model, the welding ring, the insulating part and the injection molding part are arranged, so that the injection molding part is prevented from contacting the pole, the injection molding part can not directly act on the pole in the injection molding process, the influence of high temperature and high pressure in the injection molding process on the pole is avoided, the influence of a connecting part with the pole is further reduced, and the sealing performance and the structural strength of the battery cover plate are improved; in addition, this application is protruding structure through being the setting of utmost point post lower surface, when connection piece and utmost point post welding, clears up the metal fillings more easily, reduces the circuit risk of electric core.
Drawings
Fig. 1 is a disassembled schematic view of a battery cover plate according to an embodiment of the present invention;
FIG. 2 is a schematic cross-sectional view of a battery cover plate provided in an embodiment of the present invention;
fig. 3 is a schematic view of the installation of the negative electrode pillar according to an embodiment of the present invention, wherein D represents the distance that the protruding structure extends into the lower plastic structure;
fig. 4 is a schematic structural diagram of a solder ring provided in an embodiment of the present invention.
Wherein, 1-negative pole injection molding; 2-a solder ring; 3-an insulator; 4-a negative pole post; 5-sealing ring; 6-cover body; 7-lower plastic structure; 8-positive pole injection molding; 9-positive pole column; 10-an explosion-proof valve; 11-a body portion; 12-an extension.
Detailed Description
It is to be understood that in the description of the present invention, the terms "central," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like are used in an orientation or positional relationship indicated in the drawings for convenience in describing the present invention and to simplify the description, but are not intended to indicate or imply that the device or element so referred to must have a particular orientation, be constructed in a particular orientation, and be operated in a particular manner and therefore are not to be construed as limiting the utility model. Furthermore, the terms "first," "second," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or to implicitly indicate a number of the indicated technical features. Thus, a feature defined as "first," "second," etc. 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 otherwise specified.
It should be noted that, in the description of the present invention, unless otherwise explicitly specified or limited, the terms "disposed," "connected" and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art through specific situations.
The technical solution of the present invention is further explained by the following embodiments.
In a specific embodiment, the utility model provides a battery cover plate, as shown in fig. 1, fig. 2 and fig. 3, the battery cover plate includes a cover body 6 in which a pole is inserted, the pole is sleeved with a welding ring 2, the welding ring 2 is pressed around the edge of the pole, and an insulating ring is sleeved at the joint of the welding ring 2 and the pole; at least one opening is formed in the circumferential direction of the welding ring 2, an injection molding piece is sleeved on the periphery of the welding ring 2, and an embedding structure embedded into the opening is arranged on the surface of the injection molding piece, which is in contact with the welding ring 2; the utility model discloses a plastic structure 7, including lid 6, utmost point post, lid 6 and protruding structure, the lid is kept away from a side surface of utmost point post and is provided with down plastic structure 7, the lower surface of utmost point post is protruding structure, protruding structure passes lid 6 stretches into but does not run through plastic structure 7's through-hole down, protruding structure stretches into down plastic structure 7's distance D and is 0.1 ~ 1 mm.
According to the utility model, the welding ring 2, the insulating part 3 and the injection molding part are arranged, so that the injection molding part is prevented from contacting the pole, the injection molding part can not directly act on the pole in the injection molding process of the injection molding part, the pole is prevented from being influenced by high temperature and high pressure in the injection molding process, the influence on the pole connecting part is further reduced, and the sealing performance and the structural strength of the battery cover plate are improved; in addition, this application is protruding structure through being the setting of utmost point post lower surface, when connection piece and utmost point post welding, clears up the metal fillings more easily, reduces the circuit risk of electric core.
Optionally, the lower plastic structure 7 is connected with the cover plate by means of adhesive tape or ultrasonic welding; the protruding structure of the pole can be an integrated structure with the pole or a split structure.
Specifically, the pole includes a positive pole post 9 and a negative pole post 4. Anodal post 9 is provided with anodal injection molding 8, and anodal injection molding 8 has the resistance value, and negative pole post 4 is provided with negative pole injection molding 1, and negative pole injection molding 1 is insulating.
Specifically, as shown in fig. 4, the weld ring 2 includes a main body portion 11 and an extension portion 12, the main body portion 11 is connected to the cover 6, the extension portion 12 surrounds the edge of the pole, and the opening is opened in the extension portion 12.
Specifically, the edge of the pole is stepped, and the welding ring 2 is pressed on the stepped edge of the pole.
In particular, the injection-molded part covers the weld ring 2 all around.
Specifically, the cover body 6 is provided with a mounting hole, and the pole is arranged in the mounting hole. Optionally, the periphery of the mounting hole may or may not be in a convex hull structure, and the convex hull structure may enhance the structural strength of the top cover sheet.
Specifically, the edge of the mounting hole is provided with a mounting groove, and the main body portion 11 is disposed in the mounting groove. The battery cover plate is of a structure without convex hulls by arranging the mounting groove, and the height of the pole can be effectively reduced, so that the energy density of the secondary battery is improved.
Specifically, a sealing ring 5 is arranged between the pole and the cover body 6. Furthermore, a sealing groove is formed in the cover body 6, and the sealing ring 5 is arranged in the sealing groove.
Specifically, the cover 6 is provided with an explosion-proof valve 10. Alternatively, the explosion-proof valve 10 is disposed in an explosion-proof valve 10 through hole provided in the cover plate, and the explosion-proof valve 10 includes a rupture disk and a protective film.
Specifically, the negative electrode post 4 is a composite electrode post. In the composite pole, the upper half part of the pole is aluminum alloy, the lower half part of the pole is a copper simple substance, and the two parts are welded together through brazing or friction welding technology.
Exemplarily, an assembling method of the battery cover plate is provided, which specifically includes the following steps:
installing a pole into the mounting hole, respectively sleeving the insulating part 3 and the welding ring 2 on the edge of the pole, welding the main body part 11 on the cover body 6, installing the sealing ring 5 into the sealing groove, compressing the sealing ring by using a clamp, performing injection molding on the periphery of the welding ring 2 to form an injection molding part, connecting the cover body 6, the pole and the welding ring 2, and assembling to obtain the battery cover plate, wherein the assembling method is suitable for the positive pole 9 and the negative pole 4.
The utility model also provides a battery, which comprises an electric core, a shell and a battery cover plate, wherein the electric core is arranged in the shell, the battery cover plate is covered at an opening of the shell, and the battery cover plate comprises the battery cover plate of the first aspect.
According to a specific embodiment, the welding ring 2, the insulating part 3 and the injection molding part are arranged, so that the injection molding part is prevented from contacting the pole, the injection molding part cannot directly act on the pole in the injection molding process of the injection molding part, the influence of high temperature and high pressure in the injection molding process on the pole is avoided, the influence of a connecting part with the pole is further reduced, and the sealing performance and the structural strength of the battery cover plate are improved; in addition, this application is protruding structure through being the setting of utmost point post lower surface, when connection piece and utmost point post welding, clears up the metal fillings more easily, reduces the circuit risk of electric core.
The applicant declares that the above description is only a specific embodiment of the present invention, but the scope of the present invention is not limited thereto, and it should be understood by those skilled in the art that any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention are within the scope and disclosure of the present invention.
Claims (10)
1. The battery cover plate is characterized by comprising a cover body inserted with a pole, wherein the pole is sleeved with a welding ring, the edge of the pole is pressed around the welding ring, and an insulating ring is sleeved at the joint of the welding ring and the pole;
the periphery of the welding ring is provided with at least one opening, an injection molding piece is sleeved on the periphery of the welding ring, and an embedded structure embedded into the opening is arranged on the surface of the injection molding piece, which is in contact with the welding ring;
the utility model discloses a plastic structure under the lid is kept away from a lateral surface of utmost point post, the lid is provided with down the plastic structure, the lower surface of utmost point post is protruding structure, protruding structure passes the lid stretches into but does not run through the through-hole of plastic structure down, the distance that the protruding structure stretched into down the plastic structure is 0.1 ~ 1 mm.
2. The battery cover plate according to claim 1, wherein the weld ring comprises a main body portion and an extension portion, the main body portion is connected with the cover body, the extension portion surrounds the edge of the pole in a pressing mode, and the opening is formed in the extension portion.
3. The battery cover plate of claim 1, wherein the edge of the post is stepped, and the welding ring is pressed against the stepped edge of the post.
4. The battery cover plate of claim 1, wherein the injection molded part circumferentially covers the weld ring.
5. The battery cover plate according to claim 2, wherein the cover body is provided with a mounting hole, and the pole is arranged in the mounting hole;
the edge of mounting hole has seted up the mounting groove, the main part set up in the mounting groove.
6. The battery cover plate according to claim 1, wherein a sealing ring is disposed between the post and the cover body.
7. The battery cover plate according to claim 6, wherein the cover body is provided with a sealing groove, and the sealing ring is disposed in the sealing groove.
8. The battery cover plate according to claim 1, wherein an explosion-proof valve is provided on the cover body.
9. The battery cover plate of claim 1, wherein the posts comprise positive and negative posts.
10. A battery, comprising a core, a casing, and a battery cover, wherein the core is disposed in the casing, the battery cover is disposed at an opening of the casing, and the battery cover comprises the battery cover of any one of claims 1-9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220237643.8U CN217009368U (en) | 2022-01-28 | 2022-01-28 | Battery cover plate and battery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220237643.8U CN217009368U (en) | 2022-01-28 | 2022-01-28 | Battery cover plate and battery |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN217009368U true CN217009368U (en) | 2022-07-19 |
Family
ID=82391226
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202220237643.8U Active CN217009368U (en) | 2022-01-28 | 2022-01-28 | Battery cover plate and battery |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN217009368U (en) |
-
2022
- 2022-01-28 CN CN202220237643.8U patent/CN217009368U/en active Active
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20241008 Address after: 313100 Green Intelligent Manufacturing Industrial Park, South Taihu industrial cluster, Changxing County Development Zone, Huzhou City, Zhejiang Province Patentee after: Jiewei Power (Changxing) Co.,Ltd. Country or region after: China Address before: No.11, Kaiyuan Road, Xiqing automobile industrial zone, Xiqing District, Tianjin 300380 Patentee before: TIANJIN EV ENERGIES Co.,Ltd. Country or region before: China |