CN219696567U - Battery top cover assembly, battery monomer, battery and electric equipment - Google Patents
Battery top cover assembly, battery monomer, battery and electric equipment Download PDFInfo
- Publication number
- CN219696567U CN219696567U CN202320557654.9U CN202320557654U CN219696567U CN 219696567 U CN219696567 U CN 219696567U CN 202320557654 U CN202320557654 U CN 202320557654U CN 219696567 U CN219696567 U CN 219696567U
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- China
- Prior art keywords
- battery
- top cover
- liquid absorbing
- cover body
- electrolyte
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- 239000000178 monomer Substances 0.000 title abstract description 9
- 239000007788 liquid Substances 0.000 claims abstract description 108
- 239000003792 electrolyte Substances 0.000 claims abstract description 88
- 239000004033 plastic Substances 0.000 claims description 62
- 229920003023 plastic Polymers 0.000 claims description 62
- 239000003292 glue Substances 0.000 claims description 30
- 238000005452 bending Methods 0.000 claims description 23
- 239000011148 porous material Substances 0.000 claims description 4
- 230000002035 prolonged effect Effects 0.000 abstract description 4
- 230000000149 penetrating effect Effects 0.000 abstract 1
- 239000000853 adhesive Substances 0.000 description 13
- 230000001070 adhesive effect Effects 0.000 description 13
- 238000004804 winding Methods 0.000 description 10
- 230000008595 infiltration Effects 0.000 description 8
- 238000001764 infiltration Methods 0.000 description 8
- 239000007774 positive electrode material Substances 0.000 description 7
- 238000010521 absorption reaction Methods 0.000 description 6
- 239000011248 coating agent Substances 0.000 description 6
- 238000000576 coating method Methods 0.000 description 6
- 238000001125 extrusion Methods 0.000 description 6
- 238000010586 diagram Methods 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 4
- 239000007773 negative electrode material Substances 0.000 description 4
- 239000006183 anode active material Substances 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 238000009434 installation Methods 0.000 description 3
- 238000002955 isolation Methods 0.000 description 3
- 229910001416 lithium ion Inorganic materials 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 2
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 description 2
- 239000004698 Polyethylene Substances 0.000 description 2
- 239000004743 Polypropylene Substances 0.000 description 2
- 229910052782 aluminium Inorganic materials 0.000 description 2
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 2
- 229910052744 lithium Inorganic materials 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- -1 polypropylene Polymers 0.000 description 2
- 230000008961 swelling Effects 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 235000015842 Hesperis Nutrition 0.000 description 1
- 235000012633 Iberis amara Nutrition 0.000 description 1
- JDZCKJOXGCMJGS-UHFFFAOYSA-N [Li].[S] Chemical compound [Li].[S] JDZCKJOXGCMJGS-UHFFFAOYSA-N 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 230000002493 climbing effect Effects 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- QHGJSLXSVXVKHZ-UHFFFAOYSA-N dilithium;dioxido(dioxo)manganese Chemical compound [Li+].[Li+].[O-][Mn]([O-])(=O)=O QHGJSLXSVXVKHZ-UHFFFAOYSA-N 0.000 description 1
- 239000002737 fuel gas Substances 0.000 description 1
- 239000000295 fuel oil Substances 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 238000000227 grinding Methods 0.000 description 1
- 238000010030 laminating Methods 0.000 description 1
- 238000003475 lamination Methods 0.000 description 1
- GELKBWJHTRAYNV-UHFFFAOYSA-K lithium iron phosphate Chemical compound [Li+].[Fe+2].[O-]P([O-])([O-])=O GELKBWJHTRAYNV-UHFFFAOYSA-K 0.000 description 1
- VVNXEADCOVSAER-UHFFFAOYSA-N lithium sodium Chemical compound [Li].[Na] VVNXEADCOVSAER-UHFFFAOYSA-N 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 229920000573 polyethylene Polymers 0.000 description 1
- 229920001155 polypropylene Polymers 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 229910052710 silicon Inorganic materials 0.000 description 1
- 239000010703 silicon Substances 0.000 description 1
- 230000007306 turnover Effects 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
- Sealing Battery Cases Or Jackets (AREA)
Abstract
The utility model relates to a battery top cover assembly, a battery monomer, a battery and electric equipment, wherein the battery top cover assembly comprises a top cover body and a liquid suction piece, the top cover body is provided with an outer surface and an inner surface which are oppositely arranged along the thickness direction, and a first through hole penetrating through the outer surface and the inner surface and allowing a pole to pass through is formed in the top cover body; the liquid absorbing piece comprises a first end and a second end which are formed by extending and arranging along a first direction of the top cover body, wherein at least one end of the first end and the second end extends to the edge of the top cover body, and the first direction is perpendicular to the thickness direction of the top cover body. According to the utility model, the liquid suction piece is arranged on one side of the battery top cover assembly, which is close to the battery core, and the liquid suction piece is contacted with the electrolyte, so that the battery core is soaked in the electrolyte by contacting with the liquid suction piece, and when the battery core is lying down, the battery core positioned on the upper side in the battery shell can be contacted with the electrolyte absorbed by the liquid suction piece, so that the dynamic performance and the cycle performance of the lying-down type battery core can be improved, and the service life of the battery core is prolonged.
Description
Technical Field
The utility model relates to the technical field of batteries, in particular to a battery top cover assembly, a battery monomer, a battery and electric equipment.
Background
The battery core in the battery cell used in the existing power battery pack can have the condition that the battery core cannot contact with electrolyte, particularly when the battery cell pole faces to the horizontal plane (namely lying down), the electrolyte can not be fully filled near the top of the aluminum shell due to the action of gravity, so that part of the position of the battery core cannot contact with the electrolyte, and the dynamic performance and the cycle performance of the battery can be reduced.
Therefore, how to make the battery cell above the casing fully soaked by the electrolyte to improve the dynamic performance and the cycle performance of the battery has become a technical problem to be solved in the present day.
Disclosure of Invention
The embodiment of the utility model provides a battery top cover assembly, a battery monomer, a battery and electric equipment, which can enable a battery core above and inside a shell to be fully soaked by electrolyte so as to improve the dynamic performance and the cycle performance of the battery.
In a first aspect, an embodiment of the present utility model provides a battery top cap assembly, including:
the top cover body is provided with an outer surface and an inner surface which are oppositely arranged along the thickness direction, and a first through hole which penetrates through the outer surface and the inner surface and is used for a pole to pass through is formed in the top cover body;
the liquid absorbing piece comprises a first end and a second end which are formed by extending and arranging along the first direction of the top cover body, wherein at least one end of the first end and the second end extends to the edge of the top cover body, and the first direction is perpendicular to the thickness direction of the top cover body.
In an embodiment of the present utility model, the battery pack further includes a lower plastic, the lower plastic includes a lower plastic body portion and a bending portion, a crease is formed at a connection portion between the lower plastic body portion and the bending portion, the lower plastic body portion covers an inner surface of the top cover body, and a second through hole is formed in the lower plastic body portion for the pole to extend out, wherein:
the liquid absorbing piece is arranged on the surface of the bending part, which is away from the top cover body after being bent; or,
the liquid absorbing piece is arranged between the bent part and the lower plastic body part after being bent, a third through hole is formed in the bent part, and when the bent part is folded towards the top cover body along the crease, at least one part of the liquid absorbing piece is exposed out of the third through hole.
In one embodiment of the utility model, the liquid absorbing piece is fixed on the lower plastic through a clamping structure, one of the liquid absorbing piece and the lower plastic is provided with a groove, and the other liquid absorbing piece and the lower plastic are provided with a protrusion clamped with the groove.
In one embodiment of the utility model, the liquid absorbing member is formed of an swelling gel covering at least a part of the surface of the lower plastic.
In one embodiment of the utility model, the wick is secured to the inner surface of the cap body.
In one embodiment of the utility model, the liquid absorbing member is a plate-like member composed of a porous material.
In one embodiment of the utility model, the liquid absorbing member comprises a liquid absorbing supporting plate and an expansion adhesive covering at least one surface of the liquid absorbing supporting plate.
In a second aspect, an embodiment of the present utility model further provides a battery unit, including a battery case provided with an opening to which the battery top cap assembly as described above is assembled, and a battery core accommodated in an inner space of the battery case;
the first area of the liquid absorbing piece is contacted with electrolyte, the second area of the liquid absorbing piece is contacted with the end face of the battery cell, and the first area and the second area are provided with non-overlapping parts.
In a third aspect, an embodiment of the present utility model further provides a battery, including a case and the above battery unit, where the battery unit is placed in the case.
In a fourth aspect, an embodiment of the present utility model further provides an electric device, including the battery described above.
Compared with the prior art, the technical scheme of the utility model has the following advantages:
according to the battery top cover assembly, the battery monomer, the battery and the electric equipment, the liquid absorbing piece is arranged on one side, close to the battery core, of the battery top cover assembly and is contacted with the electrolyte, so that the battery core is soaked in the electrolyte by contacting with the liquid absorbing piece, when the battery core is lying down, the battery core positioned on the upper side in the battery shell can be contacted with the electrolyte absorbed by the liquid absorbing piece, and therefore the dynamic performance and the cycle performance of the lying-down battery core can be improved, and the service life of the battery core is prolonged.
Drawings
In order that the utility model may be more readily understood, a more particular description of the utility model will be rendered by reference to specific embodiments thereof that are illustrated in the appended drawings, in which
Fig. 1 is a schematic view of the structure of the battery cell according to the present utility model when the battery cell is laid down.
Fig. 2 is a schematic view of electrolyte infiltration state when the battery cell of the present utility model is lying down.
Fig. 3 is a schematic structural view of a first embodiment of the battery cell according to the present utility model.
Fig. 4 is a schematic diagram of a structure of a battery cell according to a second embodiment of the present utility model, in which the lower plastic is not bent.
Fig. 5 is a schematic structural diagram of a battery cell according to a second embodiment of the present utility model after bending the lower plastic.
Fig. 6 is a schematic diagram illustrating an unbent structure of a lower plastic member in a third embodiment of a battery cell according to the present utility model.
Fig. 7 is a schematic structural diagram of a battery cell according to a third embodiment of the present utility model after bending the lower plastic.
Description of the specification reference numerals: 1. a battery case; 2. a battery cell; 31. a top cover body; 311. a first through hole; 32. a liquid absorbing member; 321. a liquid absorbing supporting plate; 3211. a fourth through hole; 322. swelling glue; 331. a lower plastic body portion; 3311. a second through hole; 332. a bending part; 3321. a third through hole; 3322. and a fifth through hole.
Description of the embodiments
The present utility model will be further described with reference to the accompanying drawings and specific examples, which are not intended to be limiting, so that those skilled in the art will better understand the utility model and practice it.
The utility model provides a battery top cover assembly, a battery cell, a battery and electric equipment, wherein a liquid suction piece 32 is arranged on one side, close to a battery core 2, of the battery top cover assembly, the liquid suction piece 32 is in contact with electrolyte, so that the battery core 2 infiltrates the electrolyte through the contact of the liquid suction piece 32, and when the battery core 2 is lying down, the battery core 2 positioned on the upper side in a battery shell 1 can be in contact with the electrolyte absorbed by the liquid suction piece 32, so that the dynamic performance and the cycle performance of the lying-down battery core can be improved, and the service life of the battery core 2 is prolonged. In the present embodiment, the directional terms mentioned in the description are, for example: upper, lower, left, right, front or rear, etc., are merely references to the directions of the drawings. Thus, the directional terminology is used for purposes of illustration and is not intended to be limiting of the utility model. The battery top cover assembly is used for sealing the battery shell 1, one surface of the battery shell 1 corresponding to the battery top cover assembly is the bottom, when a single battery body is laid down horizontally as shown in fig. 1, the battery top cover assembly and the bottom are vertically arranged, the battery core 2 is arranged along the horizontal direction, when a plurality of battery cores 2 are arranged, the battery top cover assembly is arranged in the battery shell 1 in a stacking mode along the vertical direction, and the battery core 2 located at the upper side refers to the battery core 2 located above as shown in fig. 2.
The electric equipment provided by the embodiment of the utility model comprises a battery. The electric equipment can be an automobile, a mobile phone, portable equipment, a notebook computer, a ship, a spacecraft, an electric toy, an electric tool and the like. The automobile can be a fuel oil automobile, a fuel gas automobile or a new energy automobile, and the new energy automobile can be a pure electric automobile, a hybrid electric automobile or a range-extended automobile and the like; spacecraft including airplanes, rockets, space planes, spacecraft, and the like; the electric toy includes fixed or mobile electric toys, such as a game machine, an electric car toy, an electric ship toy, and an electric airplane toy; power tools include metal cutting power tools, grinding power tools, assembly power tools, and railroad power tools, such as electric drills, electric grinders, electric wrenches, electric screwdrivers, electric hammers, impact drills, concrete shakers, and electric planers, among others. The embodiment of the utility model does not limit the electric equipment in particular.
The battery of the embodiment of the utility model can comprise more than two battery modules. In some embodiments, the battery further comprises a case. The battery module is arranged in the box body. More than two battery modules are arranged in the box body in an arrangement mode. The type of the case is not limited. The box body can be a frame-shaped box body, a disc-shaped box body or a box-shaped box body, etc. Illustratively, the case includes a first housing for housing the battery module and a second housing that is in close contact with the first housing. The first housing and the second housing are combined to form a receiving part for receiving the battery module.
To meet different usage power requirements, the battery module may include one or more battery cells. The battery modules can be formed by connecting a plurality of battery monomers in series, parallel or series-parallel connection, and then the battery modules are connected in series, parallel or series-parallel connection to form a battery. Series-parallel refers to a mixture of series and parallel. For example, the battery may include a plurality of battery cells, wherein the plurality of battery cells may be connected in series, parallel, or series-parallel. The plurality of battery cells may be directly disposed in the case. That is, a plurality of battery cells may be directly assembled into a battery, or may be assembled into a battery module first, and the battery module may be assembled into a battery. The battery cell includes, but is not limited to, a lithium ion-containing battery, a lithium sulfur battery, or a sodium lithium ion battery.
The battery cell comprises a battery shell 1, a battery core 2 and a battery top cover assembly, wherein the battery top cover assembly seals an opening of the battery shell 1, a containing cavity is formed between the battery top cover assembly and the battery shell 1, and the battery core 2 is arranged in the containing cavity. The battery cell 2 is a winding battery cell, the winding axis of which is parallel to the side surface of the battery case 1 (the surface of the battery case different from the top cover and the bottom), that is, when the battery case 1 is placed horizontally (i.e., the battery case 1 lies flat) as shown in fig. 2, the battery cell 2 is disposed in the battery case 1 along the horizontal direction, and the battery cell 2 may be a stacked battery cell, and the stacking surface of the stacked battery cell is also parallel to the side surface of the battery case 1.
The battery case 1 according to the embodiment of the present utility model may have a hollow structure with one side open, or may have a hollow structure with two sides open. The battery case 1 may be in various shapes, such as a cylinder, a rectangular parallelepiped, etc.
The battery cell 2 of the embodiment of the utility model comprises a positive electrode plate, a negative electrode plate and an isolating film which are arranged in a stacked manner. The positive electrode plate comprises a positive electrode current collector and a positive electrode active material layer, and the positive electrode active material layer is coated on the surface of the positive electrode current collector; the positive electrode current collector comprises a positive electrode coating area and a positive electrode lug connected to the positive electrode coating area, wherein the positive electrode coating area is coated with a positive electrode active material layer, and the positive electrode lug is not coated with the positive electrode active material layer. The negative electrode plate comprises a negative electrode current collector and a negative electrode active material layer, and the negative electrode active material layer is coated on the surface of the negative electrode current collector; the negative electrode current collector comprises a negative electrode coating area and a negative electrode tab connected to the negative electrode coating area, wherein the negative electrode coating area is coated with a negative electrode active material layer, and the negative electrode tab is not coated with the negative electrode active material layer. Taking a lithium ion battery as an example, the material of the positive electrode current collector may be aluminum, the positive electrode active material layer includes a positive electrode active material, and the positive electrode active material may be lithium cobaltate, lithium iron phosphate, ternary lithium, lithium manganate or the like. The material of the anode current collector may be copper, the anode active material layer includes an anode active material, and the anode active material may be carbon or silicon, or the like. The material of the separator may be PP (polypropylene) or PE (polyethylene). In this embodiment, the winding bottom surface of the battery cell 2 contacts the bottom surface of the battery case 1, the winding side surface contacts the side surface of the battery case 1, when the battery cell is vertical, the winding shaft of the battery cell 2 is also vertically disposed, the electrolyte contained in the battery case 1 is deposited on the bottom surface of the battery case 1, and the electrolyte can infiltrate each battery cell 2 through the winding bottom surface, however, when the battery cell is lying down, the winding shaft of the battery cell 2 is horizontally disposed, the electrolyte in the battery case 1 is deposited on the side surface of the battery case 1, and at this time, the electrolyte contacts only the battery cell 2 below the height thereof, but cannot infiltrate the battery cell 2 above the height of the electrolyte. For the stacked cells, the cells 2 located above the electrolyte level are also not wettable. Based on the above, the utility model provides a battery top cover assembly, a battery monomer, a battery and electric equipment, which can effectively solve the problem of insufficient electrolyte infiltration of the battery core 2 when the battery is laid horizontally.
For convenience of description, the following examples will take a battery cell according to the first embodiment of the present utility model as an example.
Examples
Referring to fig. 3, the present embodiment provides a battery unit including a battery case 1, a battery cell 2 and a battery top cover assembly, wherein the battery case is provided with an opening, the battery top cover assembly is assembled in the opening, and the battery cell 2 is accommodated in an inner space of the battery case 1.
The battery top cover assembly comprises a top cover body 31 and a liquid absorbing piece 32, wherein the top cover body 31 is provided with an outer surface and an inner surface which are oppositely arranged along the thickness direction, and the top cover body 31 is provided with a first through hole 311 which penetrates through the outer surface and the inner surface and is used for a pole to penetrate through; the liquid absorbing member 32 includes a first end and a second end formed extending in a first direction of the top cover body 31, at least one of the first end and the second end extending to an edge of the top cover body 31, wherein the first direction is perpendicular to a thickness direction of the top cover body 31. A first region of the liquid absorbing member 32 is in contact with the electrolyte, a second region of the liquid absorbing member 32 is in contact with the end face of the battery cell 2, and the first region and the second region have non-overlapping portions. It should be noted that, when the battery unit lies flat as shown in fig. 1, from the perspective of taking the top cover body 31 as a front view, the first direction corresponds to the width direction of the top cover body 31, and is also the height direction corresponding to the whole battery unit when the battery unit lies flat, that is, the liquid absorbing member 32 includes a first end and a second end which are formed by extending along the width direction of the top cover body 31, where the first end and the second end are respectively located in the height direction corresponding to the whole battery unit when the battery unit lies flat, where one end located at a high position is at least as high as the uppermost battery unit 2 in fig. 2, so that the electrolyte infiltrates into each battery unit 2, the top surface of the battery unit 2 is a winding top surface, all the isolation films are exposed on the winding top surface, and the winding top surface contacts with the liquid absorbing member, so that each layer of isolation film of the battery unit 2 can contact with the liquid absorbing member, and that the electrolyte can infiltrate each isolation film is guaranteed.
The liquid absorbing member 32 extends along the stacking direction of the cells 2, and one end of the liquid absorbing member 32 contacts the electrolyte while the other end contacts the end face of each cell 2 in turn. When the electric core 2 lies flat, the liquid absorbing piece 32 is contacted with electrolyte, at this time, the electrolyte extends from bottom to top along the liquid absorbing piece 32, so that the electric core 2 positioned above in the battery shell 1 can absorb the electrolyte by contacting with the liquid absorbing piece 32, and the electrolyte is enabled to infiltrate into each electric core 2, so that the infiltration speed and infiltration range of the electrolyte can be improved, and the electrolyte climbing effect is better.
The battery monomer provided by the above solves the technical defect that the battery cell 2 positioned above the existing battery cell 2 cannot be contacted with electrolyte when lying down, and the liquid absorbing piece 32 is arranged on one side of the battery top cover assembly close to the battery cell 2, and the liquid absorbing piece 32 is contacted with the electrolyte, so that the battery cell 2 infiltrates the electrolyte by contacting the liquid absorbing piece 32, and when the battery cell 2 is lying down, the battery cell 2 positioned on the upper side in the battery shell 1 can be contacted with the electrolyte absorbed by the liquid absorbing piece 32, so that the dynamic performance and the cycle performance of the lying-down battery cell can be improved, and the service life of the battery cell 2 is prolonged.
Wherein, the liquid absorbing member 32 is fixed on the inner surface of the top cover body 31. Preferably, the liquid absorbing member 32 includes a liquid absorbing supporting plate 321 and an expansion adhesive 322 covering at least one surface of the liquid absorbing supporting plate 321, the liquid absorbing supporting plate 321 can be fixed on the inner surface of the top cover body 31 in an attaching manner, a fourth through hole 3211 for a pole to pass through is arranged on the liquid absorbing supporting plate 321, the expansion adhesive 322 is arranged on one surface of the liquid absorbing supporting plate 321, which is far away from the top cover body 31, namely, one surface of the liquid absorbing supporting plate 321, which is provided with the expansion adhesive 322, is contacted with electrolyte in the battery case 1, so that the battery cells 2 infiltrate the electrolyte by contacting the liquid absorbing supporting plate 321, and when the battery cells 2 lie flat, the battery cells 2 positioned on the upper side in the battery case 1 can be contacted with the electrolyte absorbed by the liquid absorbing supporting plate 321, so that the electrolyte infiltrates each battery cell 2. Of course, the liquid absorbing member may be a plate-like member made of a porous material, and the present embodiment is not limited thereto.
Further, in the extrusion process, the electrode lug is likely to be extruded to the electrode lug root part to cause extrusion deformation and the situation of reversely inserting the battery cells 2, so that the liquid absorption supporting plate 321 of the embodiment can prevent the electrode lug from reversely inserting, and the electrode lug can be prevented from being reversely inserted between the battery cells by attaching the liquid absorption supporting plate 321 to the electrode lug, namely, the liquid absorption supporting plate 321 has the effect of preventing the electrode lug from reversely inserting when the electrolyte is enabled to infiltrate each battery cell 2.
Optionally, the thickness of the expansion glue 322 on the liquid-absorbing support plate 321 is gradually increased from bottom to top along the stacking direction of the electric core 2, that is, the thickness of the expansion glue 322 on the liquid-absorbing support plate 321 is gradually increased from bottom to top along the height direction of the electrolyte, and in the position higher than the electrolyte, the thickness of the expansion glue 322 on the liquid-absorbing support plate 321 is larger than the thickness lower than the height position of the electrolyte, so that the liquid-absorbing support plate 321 far away from the electrolyte can accumulate more electrolyte, and the uniformity of electrolyte infiltration is ensured.
Optionally, the expansion glue 322 is disposed in a partial area of the surface of the liquid-absorbing support plate 321 facing away from the top cover body 31, so long as the first area of the expansion glue 322 on the liquid-absorbing support plate 321 is guaranteed to be in contact with the electrolyte, the second area of the expansion glue 322 on the liquid-absorbing support plate 321 is in contact with the end face of the cell 2 located at the uppermost position as shown in fig. 2, wherein the first area and the second area are both partial areas of the expansion glue 322 on the liquid-absorbing support plate 321, and the first area and the second area have non-overlapping parts, so that the electrolyte infiltrates into each cell 2, the consumption of the expansion glue 322 on the liquid-absorbing support plate 321 can be reduced, and the production cost is reduced.
Referring to fig. 4 and 5, the battery cell further includes a lower plastic, wherein the lower plastic includes a lower plastic body 331 and a bending portion 332, a crease is formed at a connection portion between the lower plastic body 331 and the bending portion 332, the lower plastic body 331 covers an inner surface of the top cover body 31, a second through hole 3311 for extending a pole is formed in the lower plastic body 331, and the liquid absorbing member 32 is disposed on a surface of the bending portion 332, which is away from the top cover body 31 after being bent. The liquid absorbing member 32 is in contact with the electrolyte, so that the battery cells 2 infiltrate the electrolyte by contacting with the liquid absorbing member 32, and when the battery cells 2 lie flat, the battery cells 2 located on the upper side in the battery case 1 can contact with the electrolyte absorbed by the liquid absorbing member 32, so that the electrolyte infiltrates each battery cell 2. It should be noted that, if the bending portion 332 is bent to cover the second through hole 3311, the fifth through hole 3322 needs to be disposed at a corresponding position of the bending portion 332, and when the bending portion 332 is bent and attached to the lower plastic body portion 331, the fifth through hole 3322 overlaps the second through hole 3311 for the terminal post to pass through. Of course, if the bent portion 332 does not cover the second through hole 3311 after being bent, no through hole needs to be provided on the bent portion 332.
Preferably, the liquid absorbing member 32 is formed by an expansion adhesive 322 covering at least a part of the surface of the lower plastic, and of course, the expansion adhesive 322 is disposed on the surface of the bending portion 332 facing away from the top cover body 31 after bending, i.e. the surface of the lower plastic on which the expansion adhesive 322 is disposed contacts with the electrolyte in the battery case 1, so that the battery cells 2 infiltrate the electrolyte by contacting the expansion adhesive 322 on the lower plastic, and when the battery cells 2 lie flat, the battery cells 2 located on the upper side in the battery case 1 can contact with the electrolyte absorbed by the expansion adhesive 322 on the lower plastic, thereby impregnating the electrolyte into each battery cell 2.
Further, the tab is in the extrusion process, probably extrudeed the tab root portion and lead to the tab root portion to appear extrusion deformation and the condition of inserting the electric core backward, so this embodiment is provided with the lower plastic of inflation glue 322 and can prevent that the tab from inserting backward, through the inflation glue 322 laminating on the lower plastic, can avoid the tab to turn over and insert between the electric core, the inflation glue 322 on the lower plastic has the effect of preventing the tab from inserting backward when making each electric core 2 of electrolyte infiltration.
Optionally, the thickness of the lower plastic upper expansion glue 322 is gradually increased from bottom to top along the stacking direction of the battery core 2, that is, the thickness of the lower plastic upper expansion glue 322 is gradually increased from bottom to top along the height direction of the electrolyte, and at a position higher than the electrolyte, the thickness of the lower plastic upper expansion glue 322 is larger than that at a position lower than the height of the electrolyte, so that the lower plastic far away from the electrolyte can accumulate more electrolyte, and the uniformity of electrolyte infiltration is ensured.
Optionally, the expansion glue 322 is disposed in a partial area of the lower plastic facing away from a surface of the top cover body 31, so long as the first area of the lower plastic upper expansion glue 322 is guaranteed to be in contact with the electrolyte, the second area of the lower plastic upper expansion glue 322 is in contact with the end face of the cell 2 located at the uppermost position as shown in fig. 2, wherein the first area and the second area are both partial areas of the lower plastic upper expansion glue 322, and the first area and the second area have non-overlapping parts, so that the electrolyte infiltrates into each cell 2, thereby reducing the usage amount of the lower plastic upper expansion glue 322 and reducing the production cost.
Examples
Referring to fig. 6 and 7, the battery cell further includes a lower plastic, wherein the lower plastic includes a lower plastic body 331 and a bending portion 332, a crease is formed at a connection portion between the lower plastic body 331 and the bending portion 332, the lower plastic body 331 covers an inner surface of the top cover body 31, a second through hole 3311 for extending a pole is formed in the lower plastic body 331, the liquid absorbing member 32 is disposed between the bent bending portion 332 and the lower plastic body 331, a third through hole 3321 is formed in the bending portion 332, and at least a portion of the liquid absorbing member 32 is exposed from the third through hole 3321 after the bending portion 332 is folded along the crease toward the top cover body 31. The liquid absorbing member 32 is in contact with the electrolyte, so that the battery cells 2 infiltrate the electrolyte by contacting with the liquid absorbing member 32, and when the battery cells 2 lie flat, the battery cells 2 located on the upper side in the battery case 1 can contact with the electrolyte absorbed by the liquid absorbing member 32, so that the electrolyte infiltrates each battery cell 2. It should be noted that, if the bending portion 332 is bent to cover the second through hole 3311, the fifth through hole 3322 needs to be disposed at a corresponding position of the bending portion 332, and when the bending portion 332 is bent and attached to the lower plastic body portion 331, the fifth through hole 3322 overlaps the second through hole 3311 for the terminal post to pass through. Of course, if the bent portion 332 does not cover the second through hole 3311 after being bent, the fifth through hole 3322 does not need to be disposed on the bent portion 332.
Preferably, the liquid absorbing member 32 includes a liquid absorbing support plate 321 and an expansion adhesive 322 covering at least one surface of the liquid absorbing support plate 321, the liquid absorbing support plate 321 is fixed between the bent portion 332 and the lower plastic body 331, the expansion adhesive 322 is disposed on one surface of the liquid absorbing support plate 321 facing away from the top cover 31, and at least a portion of the expansion adhesive 322 on the liquid absorbing support plate 321 is exposed from a third through hole 3321 on the bent portion 332, so that the expansion adhesive 322 on the liquid absorbing support plate 321 contacts with the electrolyte in the battery case 1, so that the battery cells 2 infiltrate the electrolyte by contacting with the liquid absorbing support plate 321, and when the battery cells 2 lie flat, the battery cells 2 on the upper side in the battery case 1 can contact with the electrolyte absorbed by the liquid absorbing support plate 321, thereby making the electrolyte infiltrate into each battery cell 2. Of course, the liquid absorbing member 32 may be a plate-like member made of a porous material, and the present embodiment is not limited thereto.
The liquid-absorbing support plate 321 can be fixed on the lower plastic through a clamping structure, one of the liquid-absorbing support plate 321 and the lower plastic is provided with a groove, the other is provided with a protrusion clamped with the groove, and the liquid-absorbing support plate 321 and the lower plastic are assembled through the clamping structure. Of course, the liquid absorbing supporting plate 321 may be fixed between the bent portion 332 and the lower plastic body 331 by attaching, which is not limited in this embodiment.
Further, in the extrusion process, the electrode lug is likely to be extruded to the electrode lug root part to cause extrusion deformation and the situation of reversely inserting the battery cells, so that the liquid absorption supporting plate 321 of the embodiment can prevent the electrode lug from reversely inserting, the electrode lug can be prevented from being folded and reversely inserted between the battery cells through the lamination of the liquid absorption supporting plate 321 and the electrode lug, namely the liquid absorption supporting plate 321 has the effect of preventing the electrode lug from reversely inserting when the electrolyte infiltrates each battery cell 2.
Optionally, the thickness of the expansion glue 322 on the liquid-absorbing support plate 321 is gradually increased from bottom to top along the stacking direction of the electric core 2, that is, the thickness of the expansion glue 322 on the liquid-absorbing support plate 321 is gradually increased from bottom to top along the height direction of the electrolyte, and in the position higher than the electrolyte, the thickness of the expansion glue 322 on the liquid-absorbing support plate 321 is larger than the thickness lower than the height position of the electrolyte, so that the liquid-absorbing support plate 321 far away from the electrolyte can accumulate more electrolyte, and the uniformity of electrolyte infiltration is ensured.
Optionally, the expansion glue 322 is disposed in a partial area of the surface of the liquid-absorbing support plate 321 facing away from the top cover body 31, so long as the first area of the expansion glue 322 on the liquid-absorbing support plate 321 is guaranteed to be in contact with the electrolyte, the second area of the expansion glue 322 on the liquid-absorbing support plate 321 is in contact with the end face of the cell 2 located at the uppermost position as shown in fig. 2, wherein the first area and the second area are both partial areas of the expansion glue 322 on the liquid-absorbing support plate 321, and the first area and the second area have non-overlapping parts, so that the electrolyte infiltrates into each cell 2, the consumption of the expansion glue 322 on the liquid-absorbing support plate 321 can be reduced, and the production cost is reduced.
Examples
Corresponding to the first to third embodiments, the ratio of the width of the liquid absorbing member 32 to the width of the top cover body 3 in the present embodiment ranges from 0.8 to 0.95, i.e. the width of the liquid absorbing member 32 is as equal as possible to the width of the top cover body 3, so that the contact area between the liquid absorbing member 32 and the electric cells 2 can be significantly increased, so that the electric cells 2 infiltrate the electrolyte by contacting the liquid absorbing member 32, and when the electric cells 4 lie flat, the electric cells 2 located on the upper side in the battery case 1 can contact the electrolyte absorbed by the liquid absorbing member 32, thereby impregnating the electrolyte into each electric cell 2. Meanwhile, the too large width of the liquid absorbing piece 32 also affects the installation of the battery cell 2 and the installation of the top cover, so that the ratio of the width of the liquid absorbing piece 32 to the width of the top cover body 3 is smaller than 0.95, thereby guaranteeing the installation convenience of the liquid absorbing piece 32 and improving the production efficiency while considering the liquid absorbing and retaining capability of the liquid absorbing piece 32.
It is apparent that the above examples are given by way of illustration only and are not limiting of the embodiments. Other variations and modifications of the present utility model will be apparent to those of ordinary skill in the art in light of the foregoing description. It is not necessary here nor is it exhaustive of all embodiments. And obvious variations or modifications thereof are contemplated as falling within the scope of the present utility model.
Claims (10)
1. A battery top cap assembly, characterized in that: comprising the following steps:
the top cover body is provided with an outer surface and an inner surface which are oppositely arranged along the thickness direction, and a first through hole which penetrates through the outer surface and the inner surface and is used for a pole to pass through is formed in the top cover body;
the liquid absorbing piece comprises a first end and a second end which are formed by extending and arranging along the first direction of the top cover body, wherein at least one end of the first end and the second end extends to the edge of the top cover body, and the first direction is perpendicular to the thickness direction of the top cover body.
2. The battery top cap assembly according to claim 1, wherein: still include the plastic down, the plastic down includes plastic body portion and kink down, plastic body portion down with the kink links to each other the department and forms the crease, plastic body portion covers down the internal surface of top cap body, it has the confession to open down on the plastic body portion the second through-hole that the utmost point post stretches out, wherein:
the liquid absorbing piece is arranged on the surface of the bending part, which is away from the top cover body after being bent; or,
the liquid absorbing piece is arranged between the bent part and the lower plastic body part after being bent, a third through hole is formed in the bent part, and when the bent part is folded towards the top cover body along the crease, at least one part of the liquid absorbing piece is exposed out of the third through hole.
3. The battery top cap assembly according to claim 2, wherein: the liquid absorbing piece is fixed on the lower plastic through a clamping structure, one of the liquid absorbing piece and the lower plastic is provided with a groove, and the other liquid absorbing piece is provided with a protrusion clamped with the groove.
4. The battery top cap assembly according to claim 2, wherein: the liquid absorbing piece is formed by expansion glue covering at least part of the surface of the lower plastic.
5. The battery top cap assembly according to claim 1, wherein: the liquid absorbing piece is fixed on the inner surface of the top cover body.
6. The battery top cap assembly according to claim 2, 3 or 5, wherein: the liquid absorbing member is a plate-like member made of a porous material.
7. The battery top cap assembly according to claim 2, 3 or 5, wherein: the liquid absorbing piece comprises a liquid absorbing supporting plate and expansion glue covering at least one surface of the liquid absorbing supporting plate.
8. A battery cell, characterized in that: comprising a battery case provided with an opening to which the battery top cap assembly according to any one of claims 1 to 7 is fitted, and a battery cell accommodated in an inner space of the battery case;
the first area of the liquid absorbing piece is contacted with electrolyte, the second area of the liquid absorbing piece is contacted with the end face of the battery cell, and the first area and the second area are provided with non-overlapping parts.
9. A battery, characterized in that: comprising a housing and the battery cell of claim 8, said battery cell being disposed within said housing.
10. An electrical consumer, characterized in that: comprising a battery according to claim 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320557654.9U CN219696567U (en) | 2023-03-21 | 2023-03-21 | Battery top cover assembly, battery monomer, battery and electric equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320557654.9U CN219696567U (en) | 2023-03-21 | 2023-03-21 | Battery top cover assembly, battery monomer, battery and electric equipment |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219696567U true CN219696567U (en) | 2023-09-15 |
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ID=87938843
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202320557654.9U Active CN219696567U (en) | 2023-03-21 | 2023-03-21 | Battery top cover assembly, battery monomer, battery and electric equipment |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219696567U (en) |
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2023
- 2023-03-21 CN CN202320557654.9U patent/CN219696567U/en active Active
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Address after: No. 68, Xin'anjiang Road, Southeast Street, Changshu City, Suzhou City, Jiangsu Province, 215000 Patentee after: Jiangsu Zhengli New Energy Battery Technology Co.,Ltd. Country or region after: China Address before: No. 68, Xin'anjiang Road, Southeast Street, Changshu City, Suzhou City, Jiangsu Province, 215000 Patentee before: Jiangsu Zenergy Battery Technologies Co.,ltd Country or region before: China |
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