CN219779019U - Cover plate assembly and battery pack comprising same - Google Patents
Cover plate assembly and battery pack comprising same Download PDFInfo
- Publication number
- CN219779019U CN219779019U CN202320371257.2U CN202320371257U CN219779019U CN 219779019 U CN219779019 U CN 219779019U CN 202320371257 U CN202320371257 U CN 202320371257U CN 219779019 U CN219779019 U CN 219779019U
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- cover plate
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- 229910052782 aluminium Inorganic materials 0.000 claims description 20
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 20
- 238000007789 sealing Methods 0.000 claims description 20
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 14
- 229910052802 copper Inorganic materials 0.000 claims description 14
- 239000010949 copper Substances 0.000 claims description 14
- 239000012212 insulator Substances 0.000 claims description 13
- 238000003466 welding Methods 0.000 claims description 13
- 229910052751 metal Inorganic materials 0.000 claims description 10
- 239000002184 metal Substances 0.000 claims description 10
- 150000002739 metals Chemical class 0.000 claims description 6
- 230000000694 effects Effects 0.000 description 5
- 238000004519 manufacturing process Methods 0.000 description 5
- 230000005611 electricity Effects 0.000 description 4
- 238000009413 insulation Methods 0.000 description 4
- 239000011810 insulating material Substances 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 230000003647 oxidation Effects 0.000 description 3
- 238000007254 oxidation reaction Methods 0.000 description 3
- 229910000838 Al alloy Inorganic materials 0.000 description 2
- JRBRVDCKNXZZGH-UHFFFAOYSA-N alumane;copper Chemical compound [AlH3].[Cu] JRBRVDCKNXZZGH-UHFFFAOYSA-N 0.000 description 2
- 239000002131 composite material Substances 0.000 description 2
- 230000007797 corrosion Effects 0.000 description 2
- 238000005260 corrosion Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical compound O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 0.000 description 2
- 230000002093 peripheral effect Effects 0.000 description 2
- 230000004308 accommodation Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 230000007704 transition 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
- Connection Of Batteries Or Terminals (AREA)
Abstract
The utility model provides a cover plate assembly and a battery pack comprising the same, comprising a cover plate body and an electrode plate, wherein the electrode plate is arranged on the cover plate body and comprises a first electrode part and a second electrode part, and the first electrode part is electrically connected with the second electrode part and is connected end to end along the horizontal direction; the first electrode part is used for being connected with the tab of the electrode assembly, the second electrode part is used for being connected with an external electric connecting piece, the cover plate assembly adopts the structure, the electrode plate is arranged on the cover plate body, the electrode plate is arranged to be connected end to end horizontally, the part of the electrode plate, which is used for being connected with the tab of the battery, and the part of the electrode plate, which is used for being connected with the external electric connecting piece, are located at the same horizontal height, the thickness of the traditional electrode post structure, which is occupied by the electrode plate entering the battery pack from the top cover of the battery pack, is reduced, the overall occupied volume of the electrode plate is reduced, the height of the battery pack is reduced, and the space utilization rate of the battery pack is improved.
Description
Technical Field
The utility model relates to the technical field of batteries, in particular to a cover plate assembly and a battery pack comprising the same.
Background
With the development of new energy technology, electric automobiles are increasingly widely used. The battery pack plays a vital role in the electric automobile as power, and the post of current battery apron sets up in the apron upper end of battery pack generally, and the post of battery is cylindrically, and the post occupies the apron part space of battery pack, causes the battery pack to have wasted partial volume on the apron post.
The current battery is basically led to the outside of the battery pack shell from the inside of the battery pack shell through the pole, and the top cover of most battery packs adopts a traditional pole structure that the pole at the outer side of the battery pack is perpendicular to the top cover and enters the inside of the battery pack shell, so that when the battery is electrically connected with the outside, the part of the pole, which is electrically connected with the pole lug inside the battery, and the part of the pole, which is electrically connected with an external electric connecting piece, are overlapped in height, and the conducting mode enables the battery module to occupy a larger volume of the battery.
Disclosure of Invention
The utility model aims to overcome the defect that a pole column of a battery cover plate in the prior art occupies a large volume in the thickness direction, and provides a cover plate assembly and a battery pack comprising the same.
The utility model solves the technical problems by the following technical scheme:
the cover plate assembly comprises a cover plate body and an electrode plate, wherein the electrode plate is arranged on the cover plate body and comprises a first electrode part and a second electrode part, and the first electrode part is electrically connected with the second electrode part and is connected end to end along the horizontal direction; the first electrode part is used for being electrically connected with the tab of the electrode assembly, and the second electrode part is used for being connected with an external electric connector.
In this scheme, the apron subassembly adopts above-mentioned structure, sets up the electrode plate on the apron body, through setting the electrode plate to level end to end, be used for in the electrode plate with the inside utmost point ear electricity of battery be connected the part and be used for in the electrode plate with outside electric connection spare be connected the part be located same level, saved traditional utmost point post structure from the inside thickness that occupies of battery package top cap entering electric core, reduced the whole volume that occupies of electrode plate to reduce the height of battery package, improve the space utilization of battery package.
Preferably, the cover plate assembly further includes an insulating member having an accommodating space, the first electrode part and the second electrode part being disposed in the accommodating space;
the insulating piece is provided with a first through hole corresponding to the first electrode part and a second through hole corresponding to the second electrode part on the upper side and the lower side of the first electrode part and the second electrode part respectively;
the first electrode part is electrically connected with the tab through the first through hole, and the second electrode part is electrically connected with the electrical connector through the second through hole.
In this scheme, the upper and lower both sides of electrode plate set up the insulating part, have guaranteed the insulation between electrode plate and the apron subassembly, have promoted the reliability of the electric connection of apron subassembly, and first electrode portion and second electrode portion are provided with first through-hole and second through-hole respectively and are used for being connected with electrode assembly's utmost point ear electricity or with outside electric connection piece electricity.
Preferably, the insulating piece comprises a first insulating part and a second insulating part, the first insulating part and the second insulating part are mutually buckled to form the accommodating space, a first through hole is formed in the first insulating part, and a second through hole is formed in the second insulating part.
In the scheme, the insulating piece is provided with the first insulating part and the second insulating part, so that the manufacturing is convenient, and meanwhile, the electrode plates are conveniently put into the insulating piece or taken out of the insulating piece in a mutually buckling mode; the first through hole of the first insulating part and the second through hole of the second insulating part are respectively used for being electrically connected with the electrode lug on the electrode assembly or electrically connected with an external electric connecting piece.
Preferably, a first boss is further arranged on one side, away from the electrode plate, of the first insulating part, the first boss is arranged above the first through hole in a fitting mode, the first boss is provided with a third through hole, and the third through hole is communicated with the first through hole;
the cover plate assembly further includes an end cap housing the insulator, the end cap having a fourth through hole; the fourth through hole is communicated with the third through hole, and the first boss is embedded in the fourth through hole.
In this scheme, adopt above-mentioned structure, set up the third through-hole of first boss and be linked together with the fourth through-hole of end cover, whether first boss stretches out the end cover and can select according to actual conditions, if first boss is established outside the end cover, can be convenient for connect outside electric connecting piece in the electrode plate. The first boss can limit the end cover, and the welding effect is prevented from being influenced by movement of the end cover during welding. If the first boss is not arranged, the end cover may slide during welding, and welding between the end cover and the cover plate body is affected.
Preferably, the end cap is welded to the cover plate body.
In this scheme for insulating part, electrode plate hold in the space that end cover and apron body enclose, can protect insulating part and electrode plate, adopt welded mode to connect the end cover in the apron body, convenient processing, connect reliably.
Preferably, the cover plate body is provided with a mounting groove, the end cover is arranged in the mounting groove, a fifth through hole is arranged in the mounting groove, and the fifth through hole is correspondingly arranged and communicated with the second through hole;
the cover plate assembly further comprises a first sealing element, one end of the first sealing element is embedded into the fifth through hole, and the other end of the first sealing element is sleeved in the second through hole.
In the scheme, the mounting groove is formed, the end cover is arranged in the mounting groove, the thickness occupied by electric connection between the electrode plate and the electric connecting piece between the internal electric core and the external electric connecting piece is reduced, and the volume occupied by the electrode plate above the cover plate body is further reduced;
the first sealing piece is arranged, so that the reliability of electric connection between the electrode plate and the internal battery cell is improved, the sealing piece also plays an insulating role, and the electrode plate is prevented from being electrically connected with the cover plate body of the battery pack and the inside of the battery cell.
Preferably, the first electrode portion and the second electrode portion are arranged in parallel, the first electrode portion is parallel to the upper surface and the lower surface of the second electrode portion, and the first electrode portion is correspondingly flush with the upper surface and the lower surface of the second electrode portion respectively.
In the scheme, the upper surface and the lower surface of the first electrode part and the upper surface and the lower surface of the second electrode part are parallel and are arranged in parallel, so that the space occupied by the electrode plates is reduced, the volume occupied by the electric connection between the battery pack and the outside is reduced, and the energy density of the battery pack is improved.
Preferably, at the position where the cover plate component is electrically connected with the negative electrode of the battery pack body, the first electrode part and the second electrode part are made of two different metals;
and/or, at the position where the cover plate component is electrically connected with the positive electrode of the battery pack body, the first electrode part and the second electrode part are made of the same metal.
In the scheme, two different metals are arranged at the negative electrode to prevent corrosion at the negative electrode, reduce resistance and prolong the service life of the electrode plate; the same metal is arranged at the positive electrode to reduce the resistance and further improve the service time of the battery pack.
Preferably, at the position where the cover plate component is electrically connected with the negative electrode of the battery pack body, the first electrode part is copper, and the second electrode part is aluminum; or (b)
And at the position where the cover plate component is electrically connected with the anode of the battery pack body, the first electrode part and the second electrode part are both made of aluminum or copper.
In the scheme, the first electrode part and the second electrode part are made of copper or aluminum, the copper has good conductivity, softer texture and low price, and the copper is relatively stable in air; the positive electrode potential is high, copper is easily oxidized under the high potential, the oxidation potential of aluminum is high, a compact aluminum oxide film is easily formed on the surface of aluminum, and the protection effect on the aluminum in the aluminum alloy is achieved.
A battery pack comprising a cover plate assembly and the electrode assembly as described above, the cover plate assembly comprising an electrode plate, a first electrode portion of the electrode plate being electrically connected with a tab of the electrode assembly, and a second electrode portion of the electrode plate being for connection with an external electrical connector.
In this scheme, the apron subassembly adopts above-mentioned structure, sets up the electrode plate on the apron body, through setting the electrode plate to level end to end, be used for in the electrode plate with the inside utmost point ear electricity of battery be connected the part and be used for in the electrode plate with outside electric connection spare be connected the part be located same level, saved traditional utmost point post structure from the inside thickness that occupies of battery package top cap entering electric core, reduced the whole volume that occupies of electrode plate to reduce the height of battery package, improve the space utilization of battery package.
On the basis of conforming to the common knowledge in the field, the above preferred conditions can be arbitrarily combined to obtain the preferred examples of the utility model.
The utility model has the positive progress effects that: by adopting the structure, the cover plate assembly is used for arranging the electrode plates on the cover plate body, the electrode plates are connected end to end horizontally, the parts of the electrode plates, which are electrically connected with the lugs inside the battery, and the parts of the electrode plates, which are electrically connected with the external electric connecting pieces, are positioned at the same horizontal height, so that the thickness occupied by the traditional electrode post structure entering the battery pack from the top cover of the battery pack is reduced, the overall occupied volume of the electrode plates is reduced, the height of the battery is reduced, and the space utilization rate of the battery pack is improved.
Drawings
Fig. 1 is an exploded view of a cover assembly according to an embodiment of the present utility model.
Fig. 2 is a schematic top view of a cover assembly according to another embodiment of the utility model.
FIG. 3 is a schematic view of a partial cross-sectional structure of a cover assembly according to an embodiment of the present utility model.
Fig. 4 is a schematic perspective view of a first insulating portion and a second insulating portion of a cover assembly according to an embodiment of the present utility model.
Fig. 5 is a schematic cross-sectional view of an insulator of a cover plate assembly according to an embodiment of the present utility model.
Fig. 6 is a schematic top view of an electrode sheet of a cover plate assembly according to an embodiment of the present utility model.
Fig. 7 is a schematic cross-sectional view of an electrode sheet of a cap assembly according to an embodiment of the present utility model.
FIG. 8 is a schematic diagram showing an electrical connection structure between a cover assembly and an external electrical connector according to an embodiment of the present utility model.
Fig. 9 is a schematic top view of an external electrical connector according to an embodiment of the present utility model.
FIG. 10 is a schematic diagram showing the structure of an external electrical connector according to an embodiment of the present utility model.
Description of the reference numerals
Cover plate assembly 100
Cover plate body 10
Electrode plate 20
First electrode portion 21
Second electrode portion 22
Insulating member 30
First insulating portion 31
First through hole 310
First boss 311
Third through hole 312
Second insulating portion 33
Second through hole 34
End cap 40
Fourth through hole 400
Mounting groove 50
Fifth through hole 51
First seal 60
Lower plastic 70
Electrical connector 80
Detailed Description
The present utility model will now be described more fully hereinafter with reference to the accompanying drawings, in which preferred embodiments are shown.
As shown in fig. 1 to 7, the present embodiment provides a cover plate assembly 100, wherein the cover plate assembly 100 is applied to a battery pack, the cover plate assembly 100 comprises a cover plate body 10 and an electrode plate 20, the cover plate assembly 100 is arranged above the battery pack body, the electrode plate 20 is arranged on the cover plate body 10, the electrode plate 20 comprises a first electrode part 21 and a second electrode part 22, and the first electrode part 21 is electrically connected with the second electrode part 22 and is connected end to end along the horizontal direction; the first electrode part 21 is for electrical connection with a tab of an electrode assembly, and the second electrode part 22 is for connection with an external electrical connector 80.
The cover plate assembly 100 adopts the structure, the electrode plate 20 is arranged on the cover plate body 10, and the electrode plate 20 is horizontally connected end to end, so that the part of the electrode plate 20, which is used for being electrically connected with the lug inside the battery, and the part of the electrode plate 20, which is used for being connected with the external electric connecting piece 80, are positioned at the same horizontal height, the thickness occupied by the traditional electrode post structure entering the inside of the battery core from the top cover of the battery pack is saved, the volume occupied by the whole electrode plate 20 is reduced, the height of the battery pack is reduced, and the space utilization rate of the battery pack is improved; meanwhile, the production efficiency, the rate of excellent performance and the safety performance are improved, and the internal resistance of the structural member is prevented from being increased by connecting the electrode post and the electrode assembly tab through the adapter, so that the power performance of the battery pack is further improved.
In the present embodiment, as shown in fig. 1 and 2, the cap plate assembly 100 further includes an insulating member 30, the insulating member 30 having an accommodation space in which the first electrode portion 21 and the second electrode portion 22 are disposed; the insulator 30 is provided with a first through hole 310 corresponding to the first electrode part 21 and a second through hole 34 corresponding to the second electrode part 22 on both upper and lower sides of the first electrode part 21 and the second electrode part 22, respectively, the first electrode part 21 is electrically connected to the tab through the first through hole 310, and the second electrode part 22 is electrically connected to the electrical connector 80 through the second through hole 34.
Specifically, as shown in fig. 4 and 5, the insulating members 30 are disposed at the upper and lower sides of the electrode plate 20, insulation between the electrode plate 20 and the cap plate assembly 100 is ensured, reliability of electrical connection of the cap plate assembly 100 is improved, and the first through holes 310 and the second through holes 34 are disposed for electrical connection with tabs of the electrode assembly or with external electrical connection members 80, respectively.
The insulator 30 includes a first insulator 31 and a second insulator 33, the first insulator 31 and the second insulator 33 are fastened to each other to form a receiving space, a first through hole 310 is provided in the first insulator 31, and a second through hole 34 is provided in the second insulator 33.
Specifically, the insulating member 30 is divided into a first insulating portion 31 and a second insulating portion 33, which is convenient for manufacturing, and meanwhile, adopts a mode of mutual buckling, so that the electrode plate 20 is convenient to be put into the insulating member 30 or taken out of the insulating member 30; the center of the first insulation part 31 corresponds to the center position of the first through hole 310, and the center of the second insulation part 33 corresponds to the center position of the second through hole 34, so that the electrode plate 20 is electrically connected with the tab of the electrode assembly or with the external electrical connector 80.
Specifically, as shown in fig. 1, the first insulating portion 31 is the upper plastic I, the second insulating portion 33 is the upper plastic II, which is convenient for processing and has low cost; the first electrode portion 21 and the second electrode portion 22 are both of a sheet structure and are made of two conductive metals of different materials, and the thickness surfaces of the two sheets are butted and fixed by welding or riveting to form the electrode plate 20 of a flat plate structure. In other embodiments, the first insulating portion 31 and the second insulating portion 33 may be made of other insulating materials.
In this embodiment, as shown in fig. 1, a first boss 311 is further disposed on a side of the first insulating portion 31 facing away from the electrode plate 20, the first boss 311 is disposed above the first through hole 310 in a fitting manner, the first boss 311 is provided with a third through hole 312, and the third through hole 312 is communicated with the first through hole 310; the cover plate assembly 100 further includes an end cap 40, the end cap 40 accommodating the insulator 30, the end cap 40 having a fourth through hole 400; the fourth through hole 400 is communicated with the third through hole 312, the first boss 311 is embedded in the fourth through hole 400, and the outer peripheral surface of the first boss 311 is matched with the inner peripheral surface of the fourth through hole 400.
In a preferred embodiment, the center of the first through hole 310 is aligned with the center of the third through hole 312 and the center of the fourth through hole 400, thereby facilitating the manufacturing process and the welding of the external electrical connector 80 to the electrode plate 20. The first boss 311 can limit the end cover 40, so as to avoid the influence of movement of the end cover 40 during welding. Without the first boss 311, the end cap 40 may slide during welding, affecting the welding between the end cap 40 and the cap plate body 10.
The third through hole 312 of the first boss 311 is communicated with the fourth through hole 400 of the end cover 40, so that the end cover 40 can be positioned, and the end cover 40 is prevented from moving when being welded to the cover plate body 10. Whether the first boss 311 extends out of the end cover 40 can be selected according to practical situations, if the first boss 311 is arranged outside the end cover 40, the external electric connector 80 can be conveniently connected with the electrode plate 20, and the first boss 311 is preferably made of insulating materials, so that the external electric connector 80 is prevented from being worn in the third through hole 312 to cause short circuit after being connected with the electrode plate 20.
In a preferred embodiment, the end cover 40 is welded on the cover plate body 10, so that the insulating member 30 and the electrode plate 20 are accommodated in a space surrounded by the end cover 40 and the cover plate body 10, the insulating member 30 and the electrode plate 20 can be protected, the end cover 40 is made of aluminum, and the end cover 40 is connected with the cover plate body 10 in a welding manner, so that the processing is convenient and the connection is reliable.
In this embodiment, the cover plate body 10 is provided with a mounting groove 50, the end cover 40 is disposed in the mounting groove 50 to prevent the end cover 40 from being displaced in a direction perpendicular to the mounting direction of the end cover 40, a fifth through hole 51 is disposed in the mounting groove 50 and is correspondingly disposed and communicated with the second through hole 34, and the center of the fifth through hole 51 is correspondingly disposed and communicated with the center of the second through hole 34; the installation groove 50 is formed, and the end cover 40 is arranged in the installation groove 50, so that the thickness occupied by the electric connection between the electrode plate 20 and the internal cell and the external electric connection piece 80 is reduced, and the volume occupied by the electrode plate 20 is reduced.
Specifically, the cover plate body 10 is an aluminum plate, one surface of the cover plate facing away from the electrode plate 20 is provided with a lower plastic 70 plate, and the lower plastic 70 plate is provided with a through hole corresponding to the second electrode portion 22. The cover plate body 10 adopts a light aluminum plate, so that the strength is high, and the processing is easy. A plastic plate is arranged on one surface of the cover plate body 10, which faces away from the electrode plate 20, so that accidental contact between the electrode lugs of the electrode assembly and the cover plate is avoided, and electric leakage of the shell is avoided.
In some embodiments, the cover plate may be made of other materials, and if the cover plate is made of an insulating material, a plastic plate may not be provided.
The cover plate assembly 100 further comprises a first sealing member 60, one end of the first sealing member 60 is embedded into the fifth through hole 51, and the other end of the first sealing member 60 is sleeved in the second through hole 34; the provision of the first sealing member 60 improves the reliability of the electrical connection between the electrode plate 20 and the internal cell, and preferably the material of the sealing member has an insulating property, and the first sealing member 60 also plays a role of sealing the lower plastic 70 plate, and the insulating effect can prevent the electrical connection between the electrode plate 20 and the cap plate body 10 of the battery pack and the inside of the cell. The cover plate body 10 and the electrode plate 20 are sealed through the first sealing member 60, so that external dust, liquid and the like are prevented from entering the shell of the battery pack, and the safety performance of the battery pack is prevented from being influenced.
In a preferred embodiment, the first electrode portion 21 is disposed in parallel with the second electrode portion 22, the first electrode portion 21 is parallel to the upper and lower surfaces of the second electrode portion 22, and the first electrode portion 21 is flush with the upper and lower surfaces of the second electrode portion 22, respectively. The upper and lower surfaces of the first electrode part 21 and the second electrode part 22 are parallel and juxtaposed, so that the space occupied by the electrode plate 20 is reduced, the volume occupied by the connection of the cover plate assembly and an external electric connector is reduced, and the energy density of the battery pack is improved.
In the present embodiment, the cap plate assembly 100 is formed of two different metals at the electrical connection with the negative electrode of the battery pack body, the first electrode part 21 and the second electrode part 22. Two different metals are arranged at the negative electrode to prevent corrosion at the negative electrode, reduce resistance and prolong the service life of the electrode plate 20. At the position where the cover plate assembly 100 is electrically connected with the positive electrode of the battery pack body, the first electrode part 21 and the second electrode part 22 are made of the same metal, so that the resistance can be reduced, and the service time of the battery pack can be further prolonged.
In a preferred embodiment, as shown in fig. 6 and 7, at the position where the cover assembly 100 is electrically connected to the negative electrode of the battery pack body, the first electrode portion 21 is copper, and the second electrode portion 22 is aluminum; or, at the place where the cap plate assembly 100 is electrically connected to the positive electrode of the battery pack body, the first electrode part 21 and the second electrode part 22 are both made of aluminum or copper. The first electrode part 21 and the second electrode part 22 are made of copper or aluminum, the conductivity of copper is good, the texture is softer, the price is low, and the copper is relatively stable in the air; the positive electrode potential is high, copper is easily oxidized under the high potential, the oxidation potential of aluminum is high, a compact aluminum oxide film is easily formed on the surface of aluminum, and the protection effect on the aluminum in the aluminum alloy is achieved.
Specifically, the electrode plate 20 of the negative electrode adopts a copper-aluminum composite switching sheet, the joint between the copper-aluminum composite switching sheet and the middle of the switching sheet adopts a super welding mode, the electrode plate 20 of the positive electrode adopts pure aluminum, and the positive electrode switching sheet and the negative electrode switching sheet can bear higher voltage and have compact surfaces to prevent oxidation.
In the specific manufacturing and assembly process, in the first step, the electrode plate 20 is placed in an accommodating space formed by enclosing the first insulating part 31 and the second insulating part 33, the electrode plate 20 and the accommodating space formed by the first insulating part 31 and the second insulating part 33 are preferably in transition fit with each other, and a pole small unit is integrally formed, so that the influence of the acting force perpendicular to the joint surface on the joint surface of the two electrode parts of the electrode plate 20 on the integral structure of the electrode plate 20 is avoided; a second step of mounting the first seal 60 on the cap body 10; third, mounting the pole small unit on the cover plate body 10 of the first sealing member 60; and fourthly, buckling the aluminum end cover 40 on the pole small unit, clamping the end cover 40 in the mounting groove 50, applying certain pressure to the first sealing element 60, shrinking the first sealing element 60, and then welding the aluminum cover and the cover plate body 10 to realize sealing and assembly.
The embodiment further provides a battery pack, as shown in fig. 8-10, the battery pack includes the above cover plate assembly 100 and electrode assembly, the cover plate assembly includes an electrode plate, the first electrode portion of the electrode plate is electrically connected with the tab of the electrode assembly, the second electrode portion of the electrode plate is used for being connected with the external electrical connector 80, the cover plate assembly 100 is disposed above the electrode assembly, the middle portion of the external electrical connector 80 is provided with a sinking table, the sinking table stretches into the battery pack, and the sinking table is abutted and electrically connected with the first electrode portion 21, the cover plate assembly adopts the above structure, the electrode plate 20 is disposed on the cover plate body 10, by setting the electrode plate 20 to be horizontally connected end to end, the portion of the electrode plate 20 used for being electrically connected with the tab of the battery and the portion of the electrode plate 20 used for being connected with the external electrical connector 80 are located at the same horizontal height, the thickness occupied by the traditional electrode post structure entering the battery pack top cover from the battery pack inside is saved, the volume occupied by the whole body of the electrode plate 20 is reduced, and the space utilization of the battery pack is improved.
While specific embodiments of the utility model have been described above, it will be appreciated by those skilled in the art that this is by way of example only, and the scope of the utility model is defined by the appended claims. Various changes and modifications to these embodiments may be made by those skilled in the art without departing from the principles and spirit of the utility model, but such changes and modifications fall within the scope of the utility model.
Claims (10)
1. The utility model provides a apron subassembly, includes apron body and electrode plate, the electrode plate is located on the apron body, its characterized in that, the electrode plate includes:
the first electrode part is electrically connected with the second electrode part and is connected end to end along the horizontal direction;
the first electrode part is used for being electrically connected with the tab of the electrode assembly, and the second electrode part is used for being connected with an external electric connector.
2. The cover assembly of claim 1, further comprising an insulator having a receiving space, the first electrode portion and the second electrode portion being disposed within the receiving space;
the insulating piece is provided with a first through hole corresponding to the first electrode part and a second through hole corresponding to the second electrode part on the upper side and the lower side of the first electrode part and the second electrode part respectively;
the first electrode part is electrically connected with the tab through the first through hole, and the second electrode part is electrically connected with the electrical connector through the second through hole.
3. The cover plate assembly of claim 2, wherein the insulating member comprises a first insulating portion and a second insulating portion, the first insulating portion and the second insulating portion are fastened to each other and form the accommodating space, a first through hole is provided in the first insulating portion, and the second through hole is provided in the second insulating portion.
4. The cover plate assembly of claim 3, wherein a first boss is further arranged on one side of the first insulating part, which faces away from the electrode plate, and is arranged above the first through hole in a fitting manner, and the first boss is provided with a third through hole, and the third through hole is communicated with the first through hole;
the cover plate assembly further includes an end cap housing the insulator, the end cap having a fourth through hole; the fourth through hole is communicated with the third through hole, and the first boss is embedded in the fourth through hole.
5. The cover assembly of claim 4, wherein the end cap is attached to the cover body by welding.
6. The cover plate assembly according to claim 5, wherein the cover plate body is provided with a mounting groove, the end cover is arranged in the mounting groove, a fifth through hole is arranged in the mounting groove, and the fifth through hole is correspondingly arranged with and communicated with the second through hole;
the cover plate assembly further comprises a first sealing element, one end of the first sealing element is embedded into the fifth through hole, and the other end of the first sealing element is sleeved in the second through hole.
7. The cover plate assembly of claim 1, wherein the first electrode portion is juxtaposed with the second electrode portion, the first electrode portion is parallel to the upper and lower surfaces of the second electrode portion, and the first electrode portion is correspondingly flush with the upper and lower surfaces of the second electrode portion, respectively.
8. The cover assembly of claim 1, wherein the first electrode portion and the second electrode portion are of two different metals at the electrical connection of the cover assembly to the negative electrode of the battery pack body;
and/or, at the position where the cover plate component is electrically connected with the anode of the battery pack body, the first electrode part and the second electrode part are made of the same metal.
9. The cover assembly of claim 8, wherein the first electrode portion is copper and the second electrode portion is aluminum at an electrical connection of the cover assembly to the negative electrode of the battery pack body;
and at the position where the cover plate component is electrically connected with the anode of the battery pack body, the first electrode part and the second electrode part are both made of aluminum or copper.
10. A battery pack comprising the cap plate assembly according to any one of claims 1 to 9 and the electrode assembly, the cap plate assembly comprising an electrode plate, a first electrode portion of the electrode plate being electrically connected to a tab of the electrode assembly, and a second electrode portion of the electrode plate being for connection to an external electrical connector.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320371257.2U CN219779019U (en) | 2023-03-02 | 2023-03-02 | Cover plate assembly and battery pack comprising same |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320371257.2U CN219779019U (en) | 2023-03-02 | 2023-03-02 | Cover plate assembly and battery pack comprising same |
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| Publication Number | Publication Date |
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| CN219779019U true CN219779019U (en) | 2023-09-29 |
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| CN202320371257.2U Active CN219779019U (en) | 2023-03-02 | 2023-03-02 | Cover plate assembly and battery pack comprising same |
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| CN (1) | CN219779019U (en) |
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