CN220585335U - Cover plate and power battery - Google Patents
Cover plate and power battery Download PDFInfo
- Publication number
- CN220585335U CN220585335U CN202321535241.7U CN202321535241U CN220585335U CN 220585335 U CN220585335 U CN 220585335U CN 202321535241 U CN202321535241 U CN 202321535241U CN 220585335 U CN220585335 U CN 220585335U
- Authority
- CN
- China
- Prior art keywords
- pole
- cover plate
- section
- battery
- main body
- 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.)
- Active
Links
- 238000001746 injection moulding Methods 0.000 claims description 16
- 238000002347 injection Methods 0.000 claims description 11
- 239000007924 injection Substances 0.000 claims description 11
- 239000007788 liquid Substances 0.000 claims description 4
- 239000002131 composite material Substances 0.000 claims description 3
- 230000000149 penetrating effect Effects 0.000 claims description 3
- 238000003466 welding Methods 0.000 abstract description 24
- 238000000034 method Methods 0.000 abstract description 20
- 230000008569 process Effects 0.000 abstract description 12
- 239000000428 dust Substances 0.000 abstract description 6
- 239000002893 slag Substances 0.000 abstract description 6
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 8
- 229910052782 aluminium Inorganic materials 0.000 description 8
- 238000007789 sealing Methods 0.000 description 6
- 239000003292 glue Substances 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 3
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 2
- 229910052802 copper Inorganic materials 0.000 description 2
- 239000010949 copper Substances 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- 238000012546 transfer Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000004069 differentiation Effects 0.000 description 1
- 239000003792 electrolyte Substances 0.000 description 1
- 238000004880 explosion Methods 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- 238000004898 kneading Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Classifications
-
- 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
Landscapes
- Connection Of Batteries Or Terminals (AREA)
Abstract
The utility model relates to the technical field of batteries, in particular to a cover plate and a power battery. The cover plate includes: the pole base is provided with a through hole in the middle part, and the inner wall of the pole base is provided with a step structure; the pole is arranged on the step structure and connected with the pole base, and is provided with a first end face for being electrically connected with the pole lug and a second end face for being electrically connected with the outside; and the cover plate main body is connected with the pole base in an insulating way. The cover plate provided by the utility model eliminates the welding of the adapter plate, so that the space in the height direction inside the battery is utilized to the greatest extent, and the welding process is completely arranged outside the battery, thereby avoiding the risk of short circuit to the battery caused by welding slag, molten dust and the like falling into the battery.
Description
Technical Field
The utility model relates to the technical field of batteries, in particular to a cover plate and a power battery.
Background
In the production process of the existing power battery cover plate, a lower glue injection process is adopted, a switching piece is required to be welded, the space in the height direction inside the battery cannot be fully utilized, the welding process is located inside the battery, and foreign matters such as welding slag and molten dust possibly fall into the battery in the welding process, so that the risk of short circuit is caused to the battery. In addition, the existing battery has large weight, low energy density and poor power performance.
Disclosure of Invention
The utility model aims to provide a cover plate and a power battery, so as to solve the problem that welding slag, molten dust and other foreign matters possibly fall into the battery in the welding process to cause short circuit risks to the battery when welding of the existing battery cover plate switching piece is positioned in the battery.
In order to solve the technical problems, the technical scheme provided by the utility model is as follows:
in a first aspect, the present utility model provides a cover plate comprising:
the pole base is provided with a through hole in the middle part, and the inner wall of the pole base is provided with a step structure;
the pole is arranged on the step structure and connected with the pole base, and is provided with a first end face used for being electrically connected with the pole lug and a second end face used for being electrically connected to the outside;
and the cover plate main body is in insulating connection with the pole base.
Still further, the method comprises the steps of,
the step structure along circumference set up in the inner wall near the top of utmost point post base, the step structure is including recess and the convex part that corresponds the setting, the utmost point post stretches into the recess and by the convex part bearing.
Still further, the method comprises the steps of,
the pole comprises a first pole section and a second pole section, the outer surface of the first pole section is the second end surface, the inner surface of the second pole section is the first end surface, and the part of the first pole section protruding from the second pole section stretches into the groove and is supported by the protruding part.
Still further, the method comprises the steps of,
the outer edge of the first pole section is welded with the pole base.
Still further, the method comprises the steps of,
the first pole section and the second pole section are integrally formed by adopting a composite material.
Still further, the method comprises the steps of,
the nano injection molding section is arranged between the cover plate main body and the pole base, and the top of the nano injection molding section protrudes out of the cover plate main body.
Still further, the method comprises the steps of,
the cover plate main body is provided with a protruding section protruding towards the direction away from the battery cell, and the protruding section is abutted with the nano injection molding section.
Still further, the method comprises the steps of,
the cover plate main body is provided with a liquid injection hole penetrating through the cover plate main body along the thickness direction.
Still further, the method comprises the steps of,
the cover plate main body is provided with an explosion-proof valve.
In a second aspect, the present utility model provides a power battery, including the cover plate of the first aspect, the cover plate main body is fixedly connected with the housing of the power battery, and the tab of the power battery extends out of the through hole and is electrically connected with the pole.
The utility model has at least the following beneficial effects:
since the present utility model provides a cover plate, comprising: the pole base is provided with a through hole in the middle part, and the inner wall of the pole base is provided with a step structure; the pole is arranged on the step structure and connected with the pole base, and is provided with a first end face used for being electrically connected with the pole lug and a second end face used for being electrically connected to the outside; and the cover plate main body is in insulating connection with the pole base.
The through hole is formed in the middle of the pole base, so that a windowing structure is formed, the weight of the cover plate can be reduced, and the energy density and the power performance of the battery are improved. The step structure of the inner wall of the pole base can play a limiting role on the pole, and the sealing reliability of the battery is improved. Adopt the apron of this application, can cancel the change piece, the utmost point ear stretches out from the through-hole of utmost point post base after kneading, and apron main part and power battery's shell welds at first, then anodal negative pole ear respectively with positive and negative post welding, the utmost point ear after the welding is bent, the utmost point post pushes down to the step structure of utmost point post base, and is sealed with utmost point post and utmost point post base laser welding at last. Therefore, the cover plate cancels the lower glue injection process, cancels the welding of the transfer piece, not only makes the space of the height direction inside the battery obtain the limit utilization, but also places the welding process outside the battery completely, avoids welding slag, molten dust and the like from falling into the battery, and avoids the risk of short circuit to the battery.
In order to make the above objects, features and advantages of the present utility model more comprehensible, preferred embodiments accompanied with figures are described in detail below.
Drawings
In order to more clearly illustrate the embodiments of the present utility model or the technical solutions in the related art, the drawings that are required to be used in the description of the embodiments or the related art will be briefly described, and it is apparent that the drawings in the description below are some embodiments of the present utility model, and other drawings may be obtained according to the drawings without inventive effort for those skilled in the art.
FIG. 1 is a schematic view of a cover plate according to an embodiment of the present utility model;
FIG. 2 is a cross-sectional view of a cover plate provided by an embodiment of the present utility model;
fig. 3 is a partial enlarged view of a power battery according to an embodiment of the present utility model;
fig. 4 is a schematic diagram of a power battery according to an embodiment of the present utility model;
fig. 5 is a schematic view of a pole according to an embodiment of the present utility model.
Icon:
100-pole base; 110-a through hole; 120-step structure; 121-a protrusion; 200-pole; 210-a first pole segment; 211-a second end face; 220-a second pole segment; 221-a first end face; 300-a cover plate body; 310-convex section; 400-nanometer injection molding section; 500-liquid injection holes; 600-explosion-proof valve; 700-a housing; 800-tab.
Detailed Description
The following description of the embodiments of the present utility model will be made apparent and fully in view of the accompanying drawings, in which some, but not all embodiments of the utility model are shown. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.
It should be noted that: like reference numerals and letters denote like items in the following figures, and thus once an item is defined in one figure, no further definition or explanation thereof is necessary in the following figures.
In the description of the present utility model, it should be noted that the directions or positional relationships indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. are based on the directions or positional relationships shown in the drawings, are merely for convenience of describing the present utility model and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. Physical quantities in the formulas, unless otherwise noted, are understood to be basic quantities of basic units of the international system of units, or derived quantities derived from the basic quantities by mathematical operations such as multiplication, division, differentiation, or integration.
Furthermore, the terms "horizontal," "vertical," "overhang," and the like do not denote a requirement that the component be absolutely horizontal or overhang, but rather may be slightly inclined. As "horizontal" merely means that its direction is more horizontal than "vertical", and does not mean that the structure must be perfectly horizontal, but may be slightly inclined.
In the description of the present utility model, it should also be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present utility model will be understood in specific cases by those of ordinary skill in the art.
Some embodiments of the present utility model are described in detail below with reference to the accompanying drawings. The embodiments described below and features of the embodiments may be combined with each other without conflict.
Example 1
In the production process of the existing power battery cover plate, a lower glue injection process is adopted, a switching piece is required to be welded, the space in the height direction inside the battery cannot be fully utilized, the welding process is located inside the battery, and foreign matters such as welding slag and molten dust possibly fall into the battery in the welding process, so that the risk of short circuit is caused to the battery. In addition, the existing battery has large weight, low energy density and poor power performance.
In view of this, an embodiment of the present utility model provides a cover plate, including: the pole base 100, the middle part of the pole base 100 is provided with a through hole 110, and the inner wall of the pole base 100 is provided with a step structure 120; a pole 200, wherein the pole 200 is disposed on the step structure 120 and is connected to the pole base 100, and the pole 200 has a first end 221 for electrically connecting to the tab 800 and a second end 211 for electrically connecting to the outside; and a cap body 300, wherein the cap body 300 is connected with the pole base 100 in an insulating manner.
The through hole 110 is formed in the middle of the pole base 100, which forms a windowing structure, and can reduce the weight of the cover plate and improve the energy density and power performance of the battery. The stepped structure 120 of the inner wall of the pole base 100 can play a limiting role on the pole 200, and the sealing reliability of the battery is improved. By adopting the cover plate, the switching piece can be canceled, the lug 800 stretches out from the through hole 110 of the pole base 100 after being kneaded, the cover plate main body 300 is welded with the shell 700 of the power battery first, then the positive pole lug 800 and the negative pole lug 200 are respectively welded, the lug 800 is bent after being welded, the pole lug 200 is pressed down to the step structure 120 of the pole base 100, and finally the pole lug 200 and the pole base 100 are sealed by laser welding. Therefore, the cover plate cancels the lower glue injection process, cancels the welding of the transfer piece, not only makes the space of the height direction inside the battery obtain the limit utilization, but also places the welding process outside the battery completely, avoids welding slag, molten dust and the like from falling into the battery, and avoids the risk of short circuit to the battery.
In an alternative manner of this embodiment, the step structure 120 is circumferentially disposed on an inner wall of the pole base 100 near the top end, and the step structure 120 includes a groove and a protrusion 121 correspondingly disposed, and the pole 200 extends into the groove and is supported by the protrusion 121.
Referring to fig. 3, the step structure 120 protrudes from the inner wall of the pole base 100 near the top end, the protrusion 121 forms a groove above the pole base, the end of the pole 200 extends into the groove, and the protrusion 121 supports the pole 200 from the bottom. The grooves and the protrusions 121 can play a limiting role on the pole 200, and sealing reliability of the battery is improved.
In an alternative manner of this embodiment, the pole 200 includes a first pole segment 210 and a second pole segment 220, the outer surface of the first pole segment 210 is a second end surface 211, the inner surface of the second pole segment 220 is a first end surface 221, and the portion of the first pole segment 210 protruding from the second pole segment 220 extends into the recess and is supported by the protrusion 121.
Referring to fig. 5, the length of the first pole segment 210 is greater than that of the second pole segment 220, so that both ends of the first pole segment 210 extend out of the second pole segment 220, and the portion of the first pole segment 210 extending out of the second pole segment 220 extends into the recess and is supported by the protrusion 121. The second pole segment 220 is disposed in a direction of the pole base 100 toward the inside of the battery, the upper surface of the first pole segment 210 is used for external electrical connection of the battery, and the lower surface of the second pole segment 220 is used for electrical connection with the tab 800. The first pole segment 210 and the second pole segment 220 are integrally formed, which is convenient for production and processing.
The two poles 200 are respectively a positive pole and a negative pole, and are all processed by adopting a composite material. The second pole section 220 of the positive pole is an aluminum platform, and the second pole section 220 of the negative pole is a copper platform. The first pole section 210 of the positive pole and the first pole section 210 of the negative pole are both aluminum platforms. The outer edge of the first pole section 210 of the positive pole and the negative pole is connected with the pole base 100 through laser welding, so that the sealing performance is ensured.
In an alternative manner of this embodiment, a nano injection molding section 400 is disposed between the cover plate body 300 and the pole base 100, and the top of the nano injection molding section 400 protrudes out of the cover plate body 300.
Referring to fig. 3, the pole base 100 and the cover main body 300, which are both made of aluminum, are connected and fixed by nano injection molding. The pole base 100 is a windowed aluminum block, the cover plate main body 300 is a large aluminum sheet, and the connection parts of the large aluminum sheet and the aluminum block are connected by nano injection molding after chemical corrosion. The nano injection molding section 400 protrudes slightly to the outside of the battery to support the pole base 100, and the nano injection molding section 400 plays a role of isolating the pole lug 800 and the cover plate main body 300. The nano injection section 400 solves the problem of the influence of nano injection on the difference of sealing performance of copper materials and aluminum materials, and improves the sealing reliability of the battery.
In an alternative manner of this embodiment, the cover main body 300 is provided with a protruding section 310 protruding away from the cell, and the protruding section 310 abuts against the nano injection molding section 400.
Referring to fig. 3, the protruding section 310 protrudes outwards, and the protruding section 310 extends into the nano injection molding section 400 and supports the nano injection molding section 400. The provision of the protruding section 310 on the cap body 300 can enhance the structural strength of the cap so that the cap can be stably coupled with the case 700 of the battery.
In an alternative manner of the present embodiment, the cap body 300 is provided with a liquid injection hole 500 penetrating the cap body 300 in the thickness direction.
Referring to fig. 2, the filling hole 500 is disposed between two pole bases 100. After the cover plate is welded to the case 700, electrolyte can be injected into the cell through the injection hole 500.
In an alternative form of the present embodiment, the cover body 300 is mounted with the explosion-proof valve 600.
Referring to fig. 1, an explosion-proof valve 600 is disposed at the middle of the cover plate. The explosion-proof valve 600 can protect the battery when an emergency occurs, and is used for automatically opening the explosion-proof valve 600 to directly disperse high-pressure gas in the battery when the battery is over-pressurized or the temperature is over-high, so that the aim of explosion prevention is fulfilled.
Example two
The embodiment of the utility model provides a power battery, which comprises a cover plate in the first embodiment, wherein a cover plate main body 300 is fixedly connected with a housing 700 of the power battery, and a tab 800 of the power battery extends out of a through hole 110 and is electrically connected with a pole 200.
Referring to fig. 4, the cover main body 300 is welded to the housing 700, the tab 800 protrudes from the through hole 110 after being kneaded, the positive and negative tabs 800 are welded to the positive and negative poles 200 respectively, the tab 800 is bent after being welded, the poles 200 are pressed down to the step structure 120 of the pole base 100, and finally the poles 200 and the pole base 100 are sealed by laser welding, so as to complete the assembly of the power battery.
The power battery has all the advantages of the first embodiment and is not repeated here because the power battery comprises all the structures of the cover plate.
Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present utility model, and not for limiting the same; although the utility model has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some or all of the technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit of the utility model.
Claims (8)
1. A cover sheet, comprising:
the pole base (100), a through hole (110) is formed in the middle of the pole base (100), and a step structure (120) is arranged on the inner wall of the pole base (100);
a pole (200), the pole (200) being disposed on the step structure (120) and connected to the pole base (100), the pole (200) having a first end face (221) for electrically connecting to a tab (800), and a second end face (211) for electrically connecting to the outside;
a cover plate main body (300), wherein the cover plate main body (300) is in insulating connection with the pole base (100);
the step structure (120) is circumferentially arranged on the inner wall, close to the top end, of the pole base (100), the step structure (120) comprises a groove and a convex part (121) which are correspondingly arranged, and the pole (200) extends into the groove and is supported by the convex part (121);
the pole (200) comprises a first pole section (210) and a second pole section (220), the outer surface of the first pole section (210) is the second end surface (211), the inner surface of the second pole section (220) is the first end surface (221), and the part of the first pole section (210) protruding from the second pole section (220) stretches into the groove and is supported by the protruding part (121).
2. The cover plate of claim 1, wherein the cover plate is further configured to,
an outer edge of the first pole section (210) is welded to the pole base (100).
3. The cover plate of claim 1, wherein the cover plate is further configured to,
the first pole section (210) and the second pole section (220) are integrally formed by adopting a composite material.
4. The cover plate of claim 1, wherein the cover plate is further configured to,
a nano injection molding section (400) is arranged between the cover plate main body (300) and the pole base (100), and the top of the nano injection molding section (400) protrudes out of the cover plate main body (300).
5. The cover plate of claim 4, wherein,
the cover plate main body (300) is provided with a protruding section (310) protruding towards the direction far away from the battery cell, and the protruding section (310) is abutted with the nano injection molding section (400).
6. The cover plate of claim 1, wherein the cover plate is further configured to,
the cover plate main body (300) is provided with a liquid injection hole (500) penetrating the cover plate main body (300) along the thickness direction.
7. The cover plate of claim 6, wherein,
the cover plate body (300) is provided with an explosion-proof valve (600).
8. A power battery, characterized by comprising the cover plate according to any one of claims 1-7, wherein the cover plate main body (300) is fixedly connected with a housing (700) of the power battery, and a tab (800) of the power battery extends out of the through hole (110) and is electrically connected with the pole (200).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321535241.7U CN220585335U (en) | 2023-06-15 | 2023-06-15 | Cover plate and power battery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321535241.7U CN220585335U (en) | 2023-06-15 | 2023-06-15 | Cover plate and power battery |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220585335U true CN220585335U (en) | 2024-03-12 |
Family
ID=90121033
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321535241.7U Active CN220585335U (en) | 2023-06-15 | 2023-06-15 | Cover plate and power battery |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220585335U (en) |
-
2023
- 2023-06-15 CN CN202321535241.7U patent/CN220585335U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN110379953A (en) | A kind of assembling structure and its assembly method of battery cap | |
| CN215834605U (en) | Secondary cell's top cap subassembly and power battery | |
| WO2021179525A1 (en) | Battery top cover structure and assembly method | |
| CN108461665A (en) | Secondary cell head cover and its secondary cell | |
| CN216648454U (en) | Top cover structure and secondary battery | |
| CN220585335U (en) | Cover plate and power battery | |
| CN215834606U (en) | Power battery top cap, battery and power consumption device | |
| CN201466087U (en) | Lithium-ion battery cathode-post riveting sealing structure | |
| CN212907948U (en) | Battery cell structure, power battery and electric vehicle | |
| CN113644354A (en) | Battery top cap structure, battery and electric device | |
| CN117175093A (en) | Cover plate assembly and power battery | |
| CN209133545U (en) | Battery cover board sealing mechanism | |
| CN201338174Y (en) | Large capacity battery safety valve welding positioning technical equipment | |
| CN215418510U (en) | Integrated pole of secondary battery | |
| CN210576078U (en) | Electric fork-lift's nested formula battery box and electric fork-lift | |
| CN219843056U (en) | Battery cover plate and battery | |
| CN107968218B (en) | Combined type cap integrated cladding battery | |
| CN219498110U (en) | Battery cell | |
| CN201270262Y (en) | Pole column sealing structure for large capacity lithium ionic power cell | |
| CN207719338U (en) | Combined cap integrated coating battery | |
| CN218548593U (en) | Battery top cap and battery | |
| CN219739090U (en) | Battery top cap subassembly and battery cell | |
| CN219998352U (en) | Square battery shell and lithium battery | |
| CN219642967U (en) | Top cap subassembly and battery | |
| CN219937296U (en) | Secondary battery top cover structure integrated with sealing and blasting structure and secondary battery |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |