CN212461844U - Battery cover plate assembly and battery cell - Google Patents
Battery cover plate assembly and battery cell Download PDFInfo
- Publication number
- CN212461844U CN212461844U CN202021103215.3U CN202021103215U CN212461844U CN 212461844 U CN212461844 U CN 212461844U CN 202021103215 U CN202021103215 U CN 202021103215U CN 212461844 U CN212461844 U CN 212461844U
- Authority
- CN
- China
- Prior art keywords
- pole
- cover plate
- plastic
- block
- battery
- 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
- 239000004033 plastic Substances 0.000 claims abstract description 111
- 229920003023 plastic Polymers 0.000 claims abstract description 111
- 238000004804 winding Methods 0.000 claims description 32
- 238000007789 sealing Methods 0.000 claims description 20
- 239000002131 composite material Substances 0.000 claims description 15
- 241000681094 Zingel asper Species 0.000 abstract description 12
- 230000005611 electricity Effects 0.000 abstract description 2
- 239000000463 material Substances 0.000 description 16
- 238000003466 welding Methods 0.000 description 13
- 229910052782 aluminium Inorganic materials 0.000 description 10
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminum Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 10
- RYGMFSIKBFXOCR-UHFFFAOYSA-N copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 9
- 229910052802 copper Inorganic materials 0.000 description 9
- 239000010949 copper Substances 0.000 description 9
- 230000000875 corresponding Effects 0.000 description 9
- 238000000034 method Methods 0.000 description 6
- 239000004020 conductor Substances 0.000 description 5
- 238000010586 diagram Methods 0.000 description 5
- 239000011810 insulating material Substances 0.000 description 5
- 239000000203 mixture Substances 0.000 description 5
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium Ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 description 2
- 230000000712 assembly Effects 0.000 description 2
- 238000007906 compression Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000000295 fuel oil Substances 0.000 description 2
- 238000009413 insulation Methods 0.000 description 2
- 230000000670 limiting Effects 0.000 description 2
- 229910001416 lithium ion Inorganic materials 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000006011 modification reaction Methods 0.000 description 2
- 238000000465 moulding Methods 0.000 description 2
- 230000000149 penetrating Effects 0.000 description 2
- 238000005096 rolling process Methods 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 229920002943 EPDM rubber Polymers 0.000 description 1
- HBMJWWWQQXIZIP-UHFFFAOYSA-N Silicon carbide Chemical compound [Si+]#[C-] HBMJWWWQQXIZIP-UHFFFAOYSA-N 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- OKTJSMMVPCPJKN-UHFFFAOYSA-N carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 229920001971 elastomer Polymers 0.000 description 1
- 238000010292 electrical insulation Methods 0.000 description 1
- 239000003792 electrolyte Substances 0.000 description 1
- 238000006056 electrooxidation reaction Methods 0.000 description 1
- 229920001973 fluoroelastomer Polymers 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000003475 lamination Methods 0.000 description 1
- 230000004301 light adaptation Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 230000005405 multipole Effects 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 229910010271 silicon carbide Inorganic materials 0.000 description 1
- 230000000576 supplementary Effects 0.000 description 1
Images
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
Abstract
The application provides a battery cover plate subassembly and battery electricity core, battery cover plate subassembly includes: cover plate, cover plate plastic, pole block plastic, pole column and pole block; the cover plate, the cover plate plastic and the pole block plastic are respectively provided with a pole column hole, the pole block is provided with a pole block boss, and the pole column is provided with a pole column opening; the pole column sequentially penetrates through the pole column hole of the cover plate plastic, the pole column hole of the cover plate and the pole column hole of the pole block plastic to be connected with the pole block boss. This application has reduced the apron plastic and to electric core inner space's occupation through optimizing the apron structure, has greatly improved the inside space utilization of electric core, promotes the energy density of electric core.
Description
Technical Field
The application relates to the technical field of lithium ion batteries, in particular to a battery cover plate assembly and a battery cell using the same.
Background
In recent years, with policy support and guidance, the market share of new energy automobiles is gradually increased, and the discussion on replacing fuel oil vehicles by new energy automobiles is increased. In the heart of current consumers, the biggest defect of a new energy automobile compared with a traditional fuel oil automobile is the endurance mileage problem, the endurance mileage is too short, the consumption experience of the consumers is directly influenced, and how to improve the endurance mileage of the new energy automobile becomes an important problem in the current power battery industry.
The energy density of the battery needs to be improved in order to improve the endurance mileage of the new energy automobile, and two ideas mainly exist in the direction of improving the energy density of the battery at present, wherein the first idea is to improve the energy density of the battery by breaking through a battery chemical system and adopting a formula with higher energy density; secondly, through optimizing the battery structure, namely increasing the effective volume of the battery, more effective active substances are added, and further the energy density of the battery is improved.
Most of top caps in the present trade design adopts integrative the form of moulding plastics or riveting, can occupy too much space on electric core inside high space like this, leads to electric core internal space utilization can't further promote. Meanwhile, due to the design requirement of the pole column, the weight of the pole column cannot be further reduced, and the further improvement of the energy density of the battery cell is influenced for the battery cell. In addition, the processing modes of the two top covers are too complex, and the cost is higher in the processing and manufacturing process.
SUMMERY OF THE UTILITY MODEL
What this application will solve is that the top cap occupies too much space and leads to the technical problem of inner space utilization reduction on electric core inside high space among the current lithium ion battery top structural design.
In order to solve the above technical problem, the present application discloses a battery cover plate assembly, includes: cover plate, cover plate plastic, pole block plastic, pole column and pole block; the cover plate, the cover plate plastic and the pole block plastic are respectively provided with a pole column hole, the pole block is provided with a pole block boss, and the pole column is provided with a pole column opening; the pole column sequentially penetrates through the pole column hole of the cover plate plastic, the pole column hole of the cover plate and the pole column hole of the pole block plastic to be connected with the pole block boss.
Optionally, the battery cover plate assembly further comprises a sealing ring, the pole comprises a pole end plate and a pole boss arranged on the pole end plate, and the pole boss penetrates through the sealing ring so that the sealing ring is in contact with the pole end plate; the pole boss sequentially penetrates through the pole hole of the cover plate plastic, the pole hole of the cover plate and the pole hole of the pole block plastic.
Optionally, the edge of the pole opening is welded to the outer edge of the pole block boss.
Optionally, the number of the pole blocks is two, and the two pole blocks are respectively a positive pole block and a negative pole block; two pole block plastics are respectively a positive pole block plastic and a negative pole block plastic; the number of the polar columns is two, namely a positive polar column and a negative polar column.
Optionally, the negative electrode block has a composite layer structure.
Optionally, the cover plate plastic is provided with a hollow hole and a plastic groove.
Optionally, the pole block has a pole block settling platform to be welded with a connecting sheet passing through the pole opening, and the connecting sheet is connected with a pole lug on the battery roll core.
The application also discloses a battery electric core, include: the winding core is arranged in the shell and provided with a pole lug; further comprising: the battery cover plate assembly comprises a connecting sheet connected with a lug on the winding core and the battery cover plate assembly, wherein a cover plate plastic and a pole of the battery cover plate assembly are matched with the end face, provided with the lug, of the winding core, and the connecting sheet penetrates into the hole of the pole.
Optionally, the connecting sheet covers the tab on the winding core, and the connecting sheet and the tab covered by the connecting sheet penetrate into the opening of the pole.
Compared with the prior art, the technical scheme of the application has at least the following beneficial effects:
optimize the battery cover plate structure, through the effective connection of the combination realization utmost point post of apron, apron plastic and utmost point piece, reduced the apron plastic from this and to electric core inner space's occupation, greatly improved the inside space utilization of electric core, promoted the energy density of electric core.
Because the height of the winding core can be higher, the connection distance between the winding core and the pole column and between the winding core and the pole block is reduced, and the physical internal resistance of the battery cell is greatly reduced. In addition, the lugs and the connecting sheets inside the battery cell are integrated into the cover plate and the pole block, so that the heat productivity of the battery cell in the circulation and rate discharge processes is improved, and the service life and the performance of the battery cell are further improved.
Through the application to this application battery cover plate subassembly scheme, need not to adopt riveting technology or the integrative technology of moulding plastics in the current top cap course of working, reduce the processing complexity of top cap from this, promote the yields to and reduce top cap processing cost.
Through the application to this application battery cover plate subassembly scheme, utmost point ear and connection piece can be followed utmost point post and the trompil in the middle of the polar piece and passed, consequently can be with the assembled mode change that original electric core utmost point ear piled up for electric core utmost point ear is vertical to pass the top cap, has reduced the occupation of utmost point ear in electric core inner space from this, promotes the space utilization efficiency on the battery direction of height, further promotes the energy density of electric core.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
Fig. 1 and 2 are schematic perspective views of assembled battery cover plate assemblies according to embodiments of the present disclosure;
fig. 3 is an exploded schematic view of a battery cover plate assembly according to an embodiment of the present disclosure;
fig. 4 is a schematic structural diagram of a pole of a battery cover plate assembly according to an embodiment of the present disclosure;
fig. 5 is a schematic structural diagram of a positive electrode block of the battery cover plate assembly according to the embodiment of the present application;
fig. 6 is a schematic structural diagram of a negative electrode block of the battery cover plate assembly according to the embodiment of the present application;
fig. 7 is a schematic plan view of a battery cover plate assembly according to an embodiment of the present disclosure at different viewing angles;
FIG. 8 is a cross-sectional view of the D-D surface of the battery cover plate assembly shown in FIG. 7 and an enlarged structural schematic diagram thereof;
fig. 9 is a cross-sectional view of the E-E surface of the battery cover plate assembly shown in fig. 7 and an enlarged structural schematic diagram thereof.
The following is a supplementary description of the drawings:
1-a battery cover plate assembly;
2-cover plate; 20-pole hole;
3-cover plate plastic; 30-pole column hole; 31-hollowed out holes; 32-plastic grooves;
4-pole block plastic; 40-pole pore; 41-positive pole block plastic; 42-negative electrode block plastic;
5-pole column; 50-opening a hole in the pole; 51-positive pole column; 52-negative pole post; 53-pole end plate; 54-pole boss;
6-pole piece; 61-positive pole block; 62-negative pole block; 611-positive pole block boss; 612-opening the positive electrode block; 614-positive pole piece sinking platform; 621-negative pole piece boss; 622-opening the negative electrode block; 624-negative pole piece sinking platform; 62 a-composite layer one; 62 b-composite layer two;
7-sealing ring; 81. 82-laser welding position.
Detailed Description
The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. It is to be understood that the embodiments described are only a few embodiments of the present application and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
In the description of the present application, it is to be understood that the terms "upper", "lower", "top", "bottom", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are only for convenience in describing the present application and simplifying the description, and do not indicate or imply that the referred devices or elements must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present application. 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. Moreover, the terms "first," "second," and the like are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the application described herein are capable of operation in sequences other than those illustrated or described herein.
For solving among the relevant prior art technical problem that the top cap occupies too much battery case inner space, this application technical scheme provides a battery cover plate assembly, through the combination of apron, apron plastic and utmost point piece plastic realize utmost point post and the effective connection of utmost point piece to this optimizes the battery cover plate structure, reduces the inside plastic of apron and to the taking on electric core inside high space, reaches the purpose that the maximize utilized electric core space.
The present application is described in detail below with reference to an embodiment and the accompanying drawings, where the embodiment of the present application takes a square aluminum-casing battery with positive and negative pole blocks as an example, and those skilled in the art can understand that, in practical application, the present application can also be applied to a cell assembly scheme of a single pole block or a multi-pole block (more than two blocks) as required.
Please refer to fig. 1 to fig. 3 in combination, wherein fig. 1 and fig. 2 show a three-dimensional structure of a battery cover plate assembly according to an embodiment of the present disclosure after assembly; fig. 3 shows an exploded structure of a battery cover plate assembly according to an embodiment of the present disclosure.
As shown in the drawings, the battery cover plate assembly 1 of the present embodiment includes: the structure comprises a cover plate 2, cover plate plastic 3, pole block plastic 4, a pole 5 and a pole block 6; wherein, the cover plate 2, the cover plate plastic 3 and the pole block plastic 4 are respectively provided with pole column holes, such as a pole column hole 20 in the cover plate 2, a pole column hole 30 in the cover plate plastic 3 and a pole column hole 40 in the pole block plastic 4; the pole 5 has a pole opening 50 and the pole block 6 has a pole block boss (not shown). The pole 5 sequentially passes through the pole hole 30 of the cover plate plastic 3, the pole hole 20 of the cover plate 2 and the pole hole 40 of the pole block plastic 4 to be connected with the pole block boss of the pole block 6. The pole 5 is provided with a pole opening 50 for a connecting sheet to penetrate through, and the connecting sheet is connected with a pole lug on the winding core. The utmost point post hole 30 of apron plastic 3, the utmost point post hole 20 of apron 2, the utmost point post hole 40 of utmost point piece plastic 4 provide effectual assembly space for utmost point post 5, improve the assembly precision simultaneously.
Based on the design requirement for the polarity of the battery cell, there are two pole blocks 6 in this embodiment, namely a positive pole block 61 and a negative pole block 62; correspondingly, there are two electrode block plastics 4, namely an anode block plastic 41 and a cathode block plastic 42; there are also two poles 5, namely a positive pole 51 and a negative pole 52. The two pole blocks 61 and 62 are basically the same in shape and structure, the two pole block plastics 41 and 42 are the same in shape and structure, and the two poles 51 and 52 are the same in shape and structure, so the same reference numerals are used for the same structures in the drawings.
Fig. 4 shows the structure of the pole of the battery cover plate assembly according to the embodiment of the present application, which is a three-dimensional structure, an upward view structure, a forward view structure, a sectional structure of a plane a-a thereof, and an upward view structure sequentially from top to bottom. The pole 5 may include a pole end plate 53 and a pole boss 54 provided on the pole end plate 53.
With reference to fig. 3 and 4, the battery cover plate assembly 1 of the present embodiment may further include a sealing ring 7, wherein the post boss 54 on the post end plate 53 of the post 5 penetrates through the sealing ring 7, so that the sealing ring 7 contacts and adheres to the post end plate 53; the post boss 54 sequentially passes through the post hole 30 of the cover plate plastic 3, the post hole 20 of the cover plate 2 and the post hole 40 of the post block plastic 4 to be connected with the post block boss of the post block 6. Utmost point post trompil 50 is located utmost point post boss 54's centre, runs through utmost point post end plate 53 and utmost point post boss 54 to satisfy the assembly demand of electric core, provide the assembly passageway for the connection piece on rolling up the core. The post end plate 53 of the post 5 may support and compress the sealing ring 7 after assembly so that an effective seal is maintained between the post 5 and the cover plate 2 and cover plate plastic 3. The sealing ring 7 is an elastic sealing element, the material of the sealing ring can be high-temperature-resistant and corrosion-resistant materials such as rubber, fluororubber, ethylene propylene diene monomer and the like, and the effective sealing compression amount can be 15% -60%.
Referring to fig. 3, the cover plate plastic 3 and the cover plate 2, and the cover plate 2 and the pole block plastics 41 and 42 of the present embodiment may be tightly attached in sequence, and the cover plate 2 serves as a load-bearing cover plate assembly. The cover plate plastic 3 and the pole 5 can be provided with a groove on the surface for accommodating the pole end plate 53 to reduce the space occupation inside the battery cell.
The positive electrode block plastic 41 and the negative electrode block plastic 42 are groove structures, the positive electrode block 61 can be arranged in the positive electrode block plastic 41, the negative electrode block 62 can be arranged in the negative electrode block plastic 42, and the positive electrode block plastic 41 and the negative electrode block plastic 42 can surround the positive electrode block 61 and the negative electrode block 62 to play a role in protection.
Optionally, as shown in fig. 2, a plurality of hollow holes 31 and plastic grooves 32 may be further disposed on a surface of the cover plate plastic 3, which is matched with the battery roll core, in this embodiment, the hollow holes 31 may reduce the weight of the plastic, and may also prevent electrolyte from remaining inside the plastic; the plastic groove 32 can reserve more spaces for the winding core pole lug in the assembling process and after assembly, so that the pole lug is prevented from being excessively extruded, and the purpose of reducing the safety risk is achieved. The cover plastic 3 is an insulating material, such as PP, PPs, etc.
Furthermore, the two pole blocks, the two pole block plastics and the two poles of the embodiment have basically no difference in size, and the main difference is in material. Specifically, the positive electrode block plastic 41 may be made of a conductive material, and the negative electrode block plastic 42 may be made of an insulating material; the positive post 51 is made of the same material as the positive tab, the negative post 52 is made of the same material as the negative tab, the positive block 61 may be made of a single conductive material (e.g., aluminum), and the negative block 62 may be made of a composite conductive material (e.g., copper and aluminum). The pole pieces 61, 62 have pole piece sinkers for welding with connection tabs passing through the pole openings.
Fig. 5 shows the structure of the positive electrode block 61 of the battery cover plate assembly according to the embodiment of the present application, which includes a three-dimensional structure, a top view structure, a front view structure, a sectional structure of B-B plane thereof, and a bottom view structure. The positive block 61 includes a positive block boss 611, a positive block opening 612, and a positive block sinker 614. The positive electrode block boss 611 is used for welding with the corresponding pole opening 50 of the positive electrode post 51, and the edge of the pole opening 50 of the positive electrode post 51 is connected with the outer edge of the positive electrode block boss 611 through laser welding. The positive block opening 612 is used for penetrating a cell tab and a connecting piece thereof, and the positive block sinking platform 614 is used for welding the connecting piece of the tab.
Fig. 6 shows the structure of the negative electrode block 62 of the battery cover plate assembly according to the embodiment of the present application, which is a three-dimensional structure, a top view structure, a front view structure, a C-C cross-sectional structure thereof, and a bottom view structure sequentially from top to bottom. The negative electrode block 62 has a composite layer structure, which is a double-layer composite structure in this embodiment, and includes a first composite layer 62a and a second composite layer 62b, wherein the first composite layer 62a is preferably made of aluminum, and the second composite layer 62b is preferably made of copper. Negative block 62 further includes negative block boss 621, negative block aperture 622, and negative block counter sink 624. The negative electrode block boss 621 is used for welding with the corresponding pole opening 50 of the negative electrode post 52, and the edge of the pole opening 50 of the negative electrode post 52 is connected with the outer edge of the negative electrode block boss 621 through laser welding. The negative block opening 622 is used for penetrating through the battery core tab and the connecting sheet thereof, and the negative block sinking platform 624 is used for welding the connecting sheet of the tab.
The negative electrode block plastic 42 is an insulating material, such as PP, PPs, etc.; the anode block plastic 41 is a non-insulating material, which is used to conduct the anode block 61 and the cover plate 2, and may be a conductive material such as PP + carbon, metal, silicon carbide, etc.
The positive electrode block plastic 41 and the negative electrode block plastic 42 have different functions, and in a battery design scheme, the shell and the positive electrode block 61 are usually required to be electrically connected to each other to ensure a certain electrical connection, so that the potential of the shell can be increased, and electrochemical corrosion of an electric core on the inside of the shell in the charging and discharging processes can be avoided, so that the positive electrode block plastic 41 corresponding to the positive electrode block 61 needs to be made of a conductive material, for example, the conductive plastic or a metal material can be adopted; because the cover plate 2 of the housing top cover has a certain electrical connection requirement with the positive electrode block 61, in order to avoid the short circuit between the negative electrode block 62 and the cover plate 2 of the housing top cover, the negative electrode block plastic 42 corresponding to the negative electrode block 62 needs to be made of an insulating material to ensure that the negative electrode block plastic has good electrical insulation performance, for example, the insulating plastic can be used. In the structural design aspect of the anode block plastic 41 and the cathode block plastic 42, the cathode block plastic 42 is required to effectively coat the cathode block 62 as much as possible due to the insulation requirement of the cathode block plastic 42; the structure of the positive electrode block plastic 41 is not required to be excessive because the positive electrode block plastic is conducted with the top cover plate 2, and the structure of the positive electrode block plastic can be the same as that of the negative electrode block plastic 42 for the sake of appearance, and can also be designed to be different from that of the negative electrode block plastic 42.
For the convenience of laser welding, the material of the negative pole column 52 assembled corresponding to the negative pole block 62 is the same as that of the composite layer two 62b, and is preferably copper; the material of the positive electrode post 51 attached to the positive electrode block 61 is preferably aluminum, in conformity with the positive electrode block 61. The function of the pole bosses 54 of the positive pole 51 and the negative pole 52 is to facilitate the assembly and positioning. The post apertures 50 of the positive and negative posts 51, 52 may be rectangular apertures, the peripheries of which may be laser welded to the negative block bosses 621 and positive block bosses 611, respectively, to ensure effective connection of the cover plate assembly.
Generally speaking, the material of the positive connecting sheet is aluminum, the material of the negative connecting sheet is copper, and the welding method of laser welding requires that the connecting sheet and the correspondingly welded pole and pole block are consistent in material, so that the material of the positive pole 51 is aluminum, and the material of the negative pole 52 is copper correspondingly; the positive electrode block 61 is made of aluminum, and the negative electrode block 62 is made of copper. However, since the density of copper is 3 times that of aluminum, in order to reduce the weight of the negative pole block, the negative pole block 62 can be made of copper and aluminum composite, so that the weight of the negative pole block 62 can be reduced as much as possible even when the welding conditions are satisfied. For example, as shown in fig. 6, the material of the second composite layer 62b is the same copper as the corresponding welded negative electrode pillar 52, and the material of the first composite layer 62a is aluminum.
The weight of the negative pole piece is reduced, so that the overall weight of the battery is reduced, the purpose of reducing the weight of the battery is to improve the energy density of the battery, and the energy density of the battery is calculated by a formula of energy density being battery capacity/weight, so that the weight of the battery is a relatively concerned parameter in the design process of the battery, and even if the weight of the battery is reduced by a few grams, the energy density of the battery is obviously improved.
Please refer to fig. 3 and fig. 7 in combination, wherein fig. 7 is a schematic plan view showing the assembled battery cover plate assembly 1 at different viewing angles, which is a bottom view, a front view and a top view from top to bottom. The assembly process of the battery cover plate assembly 1 of the present embodiment is as follows: firstly, the anode post 51 and the cathode post 52 are respectively assembled with the sealing ring 7, then the cover plate plastic 3, the cover plate 2, the anode block plastic 41 and the cathode block plastic 42, and the anode block 61 and the cathode block 62 are sequentially arranged, and the sealing ring 7, the anode post 51 and the cathode post 52 are embedded in the cover plate plastic 3, according to the installation direction of the arrows shown in fig. 3, the pole bosses 54 on the positive pole 51 and the negative pole 52 sequentially pass through the sealing ring 7, the pole hole 30 in the cover plate plastic 3, the pole hole 20 in the cover plate 2, and the pole holes 40 in the positive pole block plastic 41 and the negative pole block plastic 42, correspondingly connected with the positive electrode block boss 611 on the positive electrode block 61 and the negative electrode block boss 621 on the negative electrode block 62, pressed and assembled to the state shown in fig. 7, referring to fig. 8, the edge of the pole opening 50 in the positive pole 51 is laser welded with the outer edge of the positive electrode block boss 611 on the positive electrode block 61 at the marked position 81 of the cross-sectional view D-D; referring to fig. 9, the edge of the post hole 50 in the negative post 52 is laser welded to the outer edge of the negative block boss 621 on the negative block 62 at the marked position 82 of the sectional view E-E. After laser welding, the positive pole 51 and the negative pole 52 can be effectively connected with the positive pole block 61 and the negative pole block 62 respectively, effective compression of the sealing ring 7 can be ensured, and effective sealing of the cover plate 2 and the positive pole 51 and the negative pole 52 can be ensured while the electrical connection is ensured to be effective.
Based on above-mentioned battery cover plate subassembly, this application embodiment still provides a battery electricity core, includes: the shell, the winding core arranged in the shell, the connecting sheet and the battery cover plate assembly. The winding core is provided with a lug, and the connecting sheet is connected with the lug; the battery cover plate component is as shown in the foregoing, the cover plate plastic and the pole column of the battery cover plate component are matched with the end face, provided with the pole lug, of the winding core, and the connecting sheet penetrates into the pole column hole of the pole column.
The winding core can be a winding structure or a lamination structure in structural form, and can be a single winding core or a structure with multiple winding cores connected in parallel in composition relation. The plastic of the cover plate has two functions: firstly, the insulation property ensures the safety; and secondly, the end face of the winding core is supported completely so as to achieve the purpose of fixing the winding core. Therefore, the matching part of the cover plate plastic and the end face of the winding core needs to be flat and cannot be protruded, otherwise, the winding core can be excessively extruded by the protruded part, and potential safety hazards are caused.
Utmost point post trompil is located the centre of the utmost point post boss of utmost point post can satisfy the assembly demand of electric core, does utmost point ear and connection piece on rolling up the core provide the assembly passageway. In this embodiment, the connecting sheet covers the tab on the winding core, and the connecting sheet and the tab covered by the connecting sheet penetrate into the opening of the pole. After the battery cover plate assembly, the winding core and the shell are assembled, the connecting sheet and the lug on the winding core can penetrate through the pole column open hole on the pole column and the pole block open hole on the pole block, and after assembly, the connecting sheet and the lug of the winding core and the pole block of the battery cover plate assembly and the pole column are hermetically welded. Through utmost point post trompil and utmost point piece trompil are integrated to connection piece and utmost point ear in the battery cover plate subassembly, after the assembly roll up the distance between core and the apron can fall to minimumly, its high theoretical possible only be the thickness of apron plastic can make the utilization ratio of present electric core inner space accomplish the highest.
It should be noted that, in the above embodiment, two pole blocks of the battery core are also assembled on the same cover plate corresponding to the design requirement that two pole lugs of the winding core are on the same end surface. In other embodiments, the two pole pieces of the cell can be assembled on the cover plates corresponding to the two opposite end surfaces, respectively, corresponding to the design requirement that the two pole lugs of the winding core are respectively arranged on the two opposite end surfaces, and accordingly, two sets of cover plate assemblies are required to be assembled to the shell respectively to be matched with the two opposite end surfaces of the winding core in the shell, which are provided with the pole lugs and the connecting sheets.
In conclusion, upon reading the present detailed disclosure, those skilled in the art will appreciate that the foregoing detailed disclosure can be presented by way of example only, and not limitation. Those skilled in the art will appreciate that the present application is intended to cover various reasonable variations, adaptations, and modifications of the embodiments described herein, although not explicitly described herein. Such alterations, improvements, and modifications are intended to be suggested by this disclosure, and are within the spirit and scope of the exemplary embodiments of this disclosure.
Furthermore, certain terminology has been used in this application to describe embodiments of the disclosure. For example, "one embodiment," "an embodiment," and/or "some embodiments" means that a particular feature, structure, or characteristic described in connection with the embodiment can be included in at least one embodiment of the present disclosure. Therefore, it is emphasized and should be appreciated that two or more references to "an embodiment" or "one embodiment" or "an alternative embodiment" in various portions of this specification are not necessarily all referring to the same embodiment. Furthermore, the particular features, structures, or characteristics may be combined as suitable in one or more embodiments of the disclosure.
It should be appreciated that in the foregoing description of embodiments of the disclosure, various features are sometimes grouped together in a single embodiment, figure, or description thereof for the purpose of streamlining the disclosure aiding in the understanding of the subject disclosure. Alternatively, various features may be dispersed throughout several embodiments of the application. This is not to be taken as an admission that any of the features of the claims are essential, and it is fully possible for a person skilled in the art to extract some of them as separate embodiments when reading the present application. That is, embodiments in the present application may also be understood as an integration of multiple sub-embodiments. And each sub-embodiment described herein is equally applicable to less than all features of a single foregoing disclosed embodiment.
In some embodiments, numbers expressing quantities or properties used to describe and claim certain embodiments of the application are to be understood as being modified in certain instances by the term "about", "approximately" or "substantially". For example, "about," "approximately," or "substantially" can mean a ± 20% variation of the value it describes, unless otherwise specified. Accordingly, in some embodiments, the numerical parameters set forth in the written description and attached claims are approximations that may vary depending upon the desired properties sought to be obtained by a particular embodiment. In some embodiments, numerical parameters should be construed in light of the number of reported significant digits and by applying ordinary rounding techniques. Notwithstanding that the numerical ranges and parameters setting forth the broad scope of the embodiments of the application are approximations, the numerical values set forth in the specific examples are reported as precisely as possible.
Each patent, patent application, publication of a patent application, and other material, such as articles, books, descriptions, publications, documents, articles, and the like, cited herein is hereby incorporated by reference. All matters hithertofore set forth herein except as related to any prosecution history, may be inconsistent or conflicting with this document or any prosecution history which may have a limiting effect on the broadest scope of the claims. Now or later associated with this document. For example, if there is any inconsistency or conflict in the description, definition, and/or use of terms associated with any of the included materials with respect to the terms, descriptions, definitions, and/or uses associated with this document, the terms in this document are used.
Finally, it should be understood that the embodiments of the application disclosed herein are illustrative of the principles of the embodiments of the present application. Other modified embodiments are also within the scope of the present application. Accordingly, the disclosed embodiments are presented by way of example only, and not limitation. Those skilled in the art may implement the present application in alternative configurations according to the embodiments of the present application. Thus, embodiments of the present application are not limited to those embodiments described with accuracy in the application.
Claims (7)
1. A battery cover plate assembly, comprising: cover plate, cover plate plastic, pole block plastic, pole column and pole block; the cover plate, the cover plate plastic and the pole block plastic are respectively provided with a pole column hole, the pole block is provided with a pole block boss, and the pole column is provided with a pole column opening; the pole block is also provided with a pole block sinking platform which is welded with a connecting sheet passing through the pole column opening; the pole sequentially penetrates through the pole hole of the cover plate plastic, the pole hole of the cover plate and the pole hole of the pole block plastic to be connected with the pole block boss; the edge of the pole column opening is welded with the outer edge of the pole block boss.
2. The battery cover plate assembly according to claim 1, further comprising a sealing ring, wherein the pole comprises a pole end plate and a pole boss disposed on the pole end plate, and the pole boss penetrates through the sealing ring so that the sealing ring is in contact with the pole end plate; the pole boss sequentially penetrates through the pole hole of the cover plate plastic, the pole hole of the cover plate and the pole hole of the pole block plastic.
3. The battery cover plate assembly of claim 1, wherein there are two of said pole pieces, a positive pole piece and a negative pole piece; two pole block plastics are respectively a positive pole block plastic and a negative pole block plastic; the number of the polar columns is two, namely a positive polar column and a negative polar column.
4. The battery cover plate assembly of claim 3, wherein the negative pole piece has a composite layer structure.
5. The battery cover plate assembly of claim 1, wherein the cover plate plastic has a hollowed-out hole and a plastic groove.
6. A battery cell comprises a shell and a winding core arranged in the shell, wherein a tab is arranged on the winding core; it is characterized by also comprising: the battery cover plate assembly comprises a connecting piece connected with a lug on the winding core and the battery cover plate assembly of any one of claims 1 to 5, wherein a cover plate plastic and a pole of the battery cover plate assembly are matched with the end face, provided with the lug, of the winding core, and the connecting piece penetrates into the hole of the pole.
7. The battery cell of claim 6, wherein the connecting sheet covers the tab on the winding core, and the connecting sheet and the tab covered thereby penetrate into the opening of the tab.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021103215.3U CN212461844U (en) | 2020-06-15 | 2020-06-15 | Battery cover plate assembly and battery cell |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021103215.3U CN212461844U (en) | 2020-06-15 | 2020-06-15 | Battery cover plate assembly and battery cell |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN212461844U true CN212461844U (en) | 2021-02-02 |
Family
ID=74470743
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202021103215.3U Active CN212461844U (en) | 2020-06-15 | 2020-06-15 | Battery cover plate assembly and battery cell |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN212461844U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113178651A (en) * | 2021-06-07 | 2021-07-27 | 蜂巢能源科技有限公司 | Battery pole sealing installation structure and installation method thereof |
-
2020
- 2020-06-15 CN CN202021103215.3U patent/CN212461844U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113178651A (en) * | 2021-06-07 | 2021-07-27 | 蜂巢能源科技有限公司 | Battery pole sealing installation structure and installation method thereof |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN212062478U (en) | Battery cover plate assembly and battery cell | |
| CN101517817B (en) | Hybrid-typed electrode assembly of capacitor-battery structure | |
| CN212461844U (en) | Battery cover plate assembly and battery cell | |
| CN102035020A (en) | Novel lager-capacity lithium ion battery | |
| US20190393512A1 (en) | Battery grid | |
| CN210897354U (en) | Battery cover plate assembly and battery cell | |
| CN111769334A (en) | Coiling electric core, battery and battery module structure | |
| CN215869580U (en) | Cylinder lithium cell structure | |
| CN201877491U (en) | Novel high-capacity lithium ion battery | |
| KR20120123851A (en) | Electrode assembly including anode and cathod electrode more than 2 and electrochemical device using the same | |
| CN101499541A (en) | Novel winding type lithium ionic cell and manufacturing method thereof | |
| CN102447090B (en) | Assembled battery | |
| CN201289891Y (en) | Internal uniform radiating structure of square power lithium ion battery pole group | |
| CN209947673U (en) | Electrochemical energy storage device | |
| US20100304197A1 (en) | Flexible foil prismatic battery having improved volumetric efficiency | |
| CN110767848A (en) | Battery cover plate assembly and battery cell | |
| CN205609693U (en) | Electrochemistry energy memory | |
| CN210897512U (en) | Battery cell and lithium battery | |
| CN209592109U (en) | High power automobile lithium-ions battery | |
| CN217361642U (en) | Electrode assembly, battery cell, battery and electric equipment | |
| CN218160518U (en) | Cylindrical sodium ion battery | |
| CN216354637U (en) | Special lead accumulator of high pressure express delivery | |
| CN217691555U (en) | Battery with a battery cell | |
| CN216288827U (en) | Hard shell lithium ion battery | |
| CN217387315U (en) | Battery structure subassembly, battery and electric vehicle |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CP03 | Change of name, title or address |
Address after: 215334 No. 1050, Fuchunjiang Road, Kunshan Development Zone, Suzhou, Jiangsu Province Patentee after: Suzhou Lingpai New Energy Technology Co.,Ltd. Patentee after: Hunan Lingpai New Energy Technology Co.,Ltd. Patentee after: Sichuan Lingpai New Energy Technology Co.,Ltd. Address before: 215335 station 62, room 404, science and Technology Plaza building, East Qianjin Road, Kunshan Development Zone, Suzhou City, Jiangsu Province (cluster registration) Patentee before: Suzhou Lingwei New Energy Technology Co.,Ltd. Patentee before: Hunan xinminya New Energy Technology Co.,Ltd. Patentee before: Sichuan xinminya Battery Technology Co.,Ltd. |
|
| CP03 | Change of name, title or address | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20220728 Address after: 421600 Jinwei Road, Guiyang Industrial Park, Qidong County, Hengyang City, Hunan Province Patentee after: Hunan lingpaidazhi Technology Co.,Ltd. Patentee after: Hunan Lingpai New Energy Technology Co.,Ltd. Patentee after: Hengyang Lingpai New Energy Technology Co.,Ltd. Patentee after: Suzhou Lingpai New Energy Technology Co.,Ltd. Patentee after: Hunan Lingpai Dingxin Battery Research Institute Co.,Ltd. Address before: 215334 No. 1050, Fuchunjiang Road, Kunshan Development Zone, Suzhou, Jiangsu Province Patentee before: Suzhou Lingpai New Energy Technology Co.,Ltd. Patentee before: Hunan Lingpai New Energy Technology Co.,Ltd. Patentee before: Sichuan Lingpai New Energy Technology Co.,Ltd. |
|
| TR01 | Transfer of patent right |