CN220628149U - Integrated confluence disc and end cover assembly - Google Patents

Abstract

The application discloses an integral type dish that converges includes first confluence piece, second confluence piece, insulating part and fixed column, and first confluence piece includes first constant head tank; the second conflux piece includes the second constant head tank, and the fixed column is used for cooperating with first constant head tank and second constant head tank, and the tip of fixed column still includes spacing portion to with first conflux piece and second conflux piece are fixed on the insulating part. An end cap assembly including the integrated busway tray is also provided. The integrated bus plate can effectively simplify the component structure and save the assembly process.

Description

Integrated confluence disc and end cover assembly

Technical Field

The utility model relates to the field of batteries, in particular to the field of bus plates.

Background

The battery pack is one of the main sources of power of the electric automobile at present, and a plurality of lithium battery monomers are combined to form the power battery pack for the automobile. Therefore, the consistency of the battery cells determines the upper limit of the power performance and the safety performance of the whole vehicle.

The top cover assembly of the traditional battery is complex in structure, and in the battery manufacturing process, multiple parts such as a complex positive electrode confluence disc, a complex negative electrode confluence disc, a sealing element and the like are required to be assembled together, and higher operation precision is required to be ensured.

Disclosure of Invention

An object of the present utility model is to provide an integrated confluence plate.

The integrated bus plate for achieving the purpose comprises a first bus plate, a second bus plate, an insulating piece and a fixing column, wherein the first bus plate comprises a first positioning groove; the second conflux piece includes the second constant head tank, the fixed column be used for with first constant head tank with the cooperation of second constant head tank, the tip of fixed column still includes spacing portion, in order will first conflux piece with the second conflux piece is fixed on the insulating part.

In one or more embodiments, the ends of the fixing posts are configured to be thermally deformable to form the limit stop.

In one or more embodiments, the fixing post and the insulating member are one piece or separate pieces.

In one or more embodiments, the fixing post and the stopper are provided to be injection-moldable.

In one or more embodiments, the insulating member includes an outer peripheral wall and a partition defining first and second receiving holes isolated from each other, the first and second receiving holes being for receiving the first and second bus plates, respectively.

In one or more embodiments, the spacer includes a spacer protrusion having a ventilation opening thereon.

In one or more embodiments, the first busbar sheet includes a first tray bottom surface, a first extension mounting surface, and an edge wall surface, the first extension mounting surface is provided with the first positioning groove, the edge wall surface includes a horizontal flange and an arc-shaped elevation, the horizontal flange is used for fitting the peripheral wall of the insulating member, and the arc-shaped elevation is used for connecting the horizontal flange and the first tray bottom surface.

In one or more embodiments, the first epitaxial mounting surface and the first disk bottom surface are disposed with a height differential.

In one or more embodiments, the peripheral wall is provided with a protrusion at a portion thereof which does not abut the horizontal flange.

In one or more embodiments, the second busbar sheet includes a second tray bottom surface, a second epitaxial mounting surface, and a raised extension platform, the second tray bottom surface having a hollowed-out portion, the second epitaxial mounting surface being provided with the second positioning groove.

In one or more embodiments, the convex extension platform, the second epitaxial mounting face, and the second disk bottom face are disposed with a height differential.

In one or more embodiments, the spacer includes a through hole and the raised extension platform extends above the through hole.

In one or more embodiments, the first and second detents are hole detents or arcuate detents.

Another object of the present utility model is to provide an end cap assembly for capping a battery core, the battery core having a positive tab and a negative tab at ends thereof, the end cap assembly comprising: one of the first and second bus plates of the integrated bus plate is electrically connected with one of the positive electrode tab and the negative electrode tab, and the other is electrically connected with the other of the positive electrode tab and the negative electrode tab; and an end cover comprising a pole, wherein the pole is electrically connected with the second bus plate of the integrated bus plate.

Above-mentioned integral type is converged and is taken as end cap structure with the help of fixed column and spacing portion, and the integrated part is constituteed to first confluence piece, second confluence piece and insulating part simply and conveniently, directly is used for battery manufacturing with this integrated part, can effectively save the assembly process, and the setting of integrated part can guarantee that positive and negative pole is converged and is in the same atress environment, promotes positive and negative pole welded uniformity.

Drawings

The above and other features, properties and advantages of the present utility model will become more apparent from the following description in conjunction with the accompanying drawings and embodiments, in which:

fig. 1 is a schematic view of a battery structure;

FIG. 2 is a schematic diagram of one embodiment of an integrated busway tray;

FIG. 3 is a schematic view of a first busbar, a second busbar and an insulator in a split manner;

FIG. 4 is a schematic view of one embodiment of a first bus bar;

FIG. 5 is a cross-sectional view taken along the direction A-A in FIG. 4;

FIG. 6 is a schematic view of another embodiment of a first manifold plate;

FIG. 7 is a schematic view of an embodiment of a second buss plate;

FIG. 8 is a cross-sectional view taken along the direction B-B in FIG. 7;

FIG. 9 is a top view of one embodiment of an integrated busway tray;

FIG. 10 is a cross-sectional view taken along the direction C-C in FIG. 9;

FIG. 11A is a cross-sectional view taken along the direction D-D in FIG. 9;

FIG. 11B is a sectional view in the D-D direction of the fixing post after deformation;

FIG. 12 is a bottom view of the insulator;

FIG. 13 is an oblique view of an integrated busway tray;

fig. 14 is a cross-sectional view taken along the direction E-E in fig. 13.

Sign mark description

1 outer casing

2 battery pole core

3 integral type collection flow disc

4 end cap assembly

5 end cap

21 positive electrode tab

22 negative electrode tab

31 first confluence sheet

32 second bus bar

33 insulating member

310 first epitaxial mounting surface

311 first positioning groove

316 arc-shaped elevation

317 horizontal flange

318 edge wall

319 first tray bottom surface

320 second epitaxial mounting surface

322 second positioning groove

323 connecting straight surface

325 hollowed-out part

326 electrical connection surface

327 connecting cambered surface

328 bump extension platform

329 second disk bottom surface

331 first accommodation hole

332 second accommodation hole

333 projection

334 isolation bump

335 ventilation opening

336 spacer

337 through hole

338 peripheral wall

339 fixing column

Detailed Description

The present utility model will be further described with reference to specific embodiments and drawings, in which more details are set forth in the following description in order to provide a thorough understanding of the present utility model, but it will be apparent that the present utility model can be embodied in many other forms than described herein, and that those skilled in the art may make similar generalizations and deductions depending on the actual application without departing from the spirit of the present utility model, and therefore should not be construed to limit the scope of the present utility model in terms of the content of this specific embodiment.

It is noted that these and other figures are merely examples, which are not drawn to scale and should not be construed as limiting the scope of the utility model as it is actually claimed.

Fig. 1 shows the basic structure of a battery cell, comprising a housing 1, a battery pole core 2, an end cap assembly 4, the end cap assembly 4 comprising an integrated buss disc 3 and an end cap 5. The battery pole core 2 is provided with an electrode assembly comprising a positive pole tab 21 and a negative pole tab 22, and the end cover 5 is provided with a pole. The end cap assembly 4 is used for sealing the battery pole core 2, wherein the positive electrode lug 21 is electrically connected with the pole column through the integrated bus plate 3 so as to realize electric conduction.

With continued reference to fig. 2 and 3, the present disclosure provides an integrated busbar disc, which is provided with a fixing column 339, where the fixing column 339 is provided with a limiting portion, so that the first busbar sheet 31, the second busbar sheet 32 and the insulating member 33 are combined into an integrated piece, thereby ensuring that the anode and cathode busbar disc is in the same stress environment, and further improving the consistency of anode and cathode welding.

The terms "first", "second", etc. in the foregoing and following descriptions are merely used to facilitate distinguishing between corresponding parts, and unless otherwise stated, the terms are not meant to be construed as limiting the scope of the present application.

Referring to fig. 3, the insulating member 33 includes a peripheral wall 338 and a partition portion 336, the peripheral wall 338 and the partition portion 336 defining a first receiving hole 331 and a second receiving hole 332 isolated from each other, the first receiving hole 331 and the second receiving hole 332 being for receiving the first bus bar 31 and the second bus bar 32, respectively.

The partition 336 is provided with a through hole 337.

Referring to fig. 12, in some embodiments, the spacer 336 includes a spacer protrusion 334 extending toward the battery tab. The isolation protrusion 334 is located between the first accommodating hole 331 and the second accommodating hole 332, and plays an insulating role on the first bus bar 31 and the second bus bar 32, and since the integrated bus bar disc 3 is located at the end of the battery pole core 2, the first accommodating hole 331, the second accommodating hole 332 and the isolation protrusion 334 define chambers respectively accommodating the first bus bar 31 and the second bus bar 32 with the battery pole core 2, so that the first bus bar 31 and the second bus bar 32 are effectively prevented from contacting, and the first bus bar 31 and the second bus bar 32 are ensured to be in an isolated state. The convex isolation structure has a larger insulation gap than the planar structure, and thus can prevent positive and negative electrodes from contacting. In addition, the isolation protrusion 334 can be further disposed at a position between the positive electrode tab 21 and the negative electrode tab 22, so as to limit the positions of the positive electrode tab 21 and the negative electrode tab 22.

Further, the isolation protrusion 334 is provided with a ventilation opening 335 for ventilation. In addition, the defined chamber may be used for storage of gas and electrolyte, and the gas-permeable port 335 may serve as a passage for electrolyte or gas.

The isolating part 336 may have a planar structure on the upper side as shown in fig. 3 to enclose the isolating protrusion 334, or may have a groove structure as shown in fig. 13 to directly expose the isolating protrusion 334 and the ventilation opening 335.

The insulating member 33 includes, but is not limited to, an insulating material such as plastic.

As will be understood with continued reference to fig. 4 and 5, the first bus plate 31 includes a first tray bottom surface 319, a first extension mounting surface 310, and an edge wall surface 318, and the first extension mounting surface 310 is provided with first positioning grooves 311 at both ends of the first tray bottom surface 319. The edge wall 318 includes a horizontal flange 317 and an arcuate elevation 316, the horizontal flange 317 being adapted to fit against a peripheral wall 338 of the insulator 33, the arcuate elevation 316 being adapted to connect the horizontal flange 317 and the first tray bottom surface 319. The first tray bottom surface 319 and the horizontal flange 317 serve as two electrical connection surfaces, respectively.

Preferably, the first epitaxial mounting face 310 and the first tray bottom face 319 are provided with a height difference to position the relative positions of the first bus bar 31 and the insulator 33.

The second manifold 32, as will be understood with continued reference to fig. 7 and 8, includes a second tray bottom surface 329, a second epitaxial mounting surface 320, and a raised extension platform 328. The second bottom 329 has a cutout 325, and the cutout 325 can thin the second bus bar 32. The second mounting surface 320 is provided with second positioning slots 322 at both ends of the second tray bottom surface 329. The convex extension platform 328 is provided with the electrical connection surface 326 of the second busbar 32, so that the convex extension platform 328 with the electrical connection surface is arranged at the uppermost part of the integrated busbar disc, and effective contact of the electrical connection surface during installation is ensured. The bump extension platform 328 extends above the through hole 337.

Preferably, the convex extension platform 328, the second epitaxial mounting face 320 and the second tray bottom face 329 are provided with a height difference to locate the relative positions of the second bus bar 32 and the insulator 33.

The second bottom plate 329 is connected to the protruding extension platform 328 through the connection arc 327, and in addition, the second bottom plate 329 is also used as an electrical connection area, such as the hollowed-out portion 325 is used as a local thinning area or a marking area, for a fixed connection area when the bus bar is electrically connected to the battery pole core.

After the relative positions of the first and second bus plates 31 and 32 and the insulator 33 are determined, the three are fixed. The first bus bar 31 includes a first positioning groove 311, the second bus bar 32 includes a second positioning groove 322, and the fixing column 339 passes through the first positioning groove 311 and the second positioning groove 322, respectively, and a limiting portion thereon fixes the first bus bar 31 and the insulating member 33, and the second bus bar 32 and the insulating member 33, respectively.

The limiting part is used as a plug structure, and refers to a structure which is positioned at the end part of the fixed column 339 and is used for blocking the first positioning groove 311 and the second positioning groove 322.

In some embodiments, the exposed ends of the fixing posts 339 passing through the first and second positioning grooves 311 and 322 are configured to be thermally deformable to form the limit portions.

As shown in fig. 9, 11A and 11B, in the first embodiment, the fixing column 339 and the insulating member 33 are integrated, and after the fixing column 339 passes through the first positioning groove 311 and the second positioning groove 322, the end of the fixing column 339 is heated, and after the deformation, the end of the fixing column 339 blocks the notch, and the first bus bar 31 and the second bus bar 32 are fixed to the insulating member 33 by the deformation.

Specifically, as shown in fig. 11A, when the integrated bus plate is initially installed, the fixing column 339 is inserted through the first positioning groove 311 and the second positioning groove 322 to perform a guiding and positioning function.

When installed, the arc-shaped vertical surface 316 of the first bus bar 31 is used for the horizontal direction of the installation and positioning of the bus bar, and the horizontal flange 317 is used for the vertical direction positioning during installation. The first extension mounting surface 310 is preferably lower than the horizontal flange 317, and the horizontal flange 317 is always kept at the uppermost part of the whole first bus bar 31, so that the connection reliability is ensured during the assembly connection. The connection arc surface 327 and the connection straight surface 323 of the second bus bar 32 are used for horizontal positioning when the second bus bar 32 is mounted, and the second epitaxial mounting surface 320 is positioned in the vertical direction.

After the first bus bar 31, the second bus bar 32 and the insulating member 33 are positioned, the fixing column 339 is heated, the plastic fixing column 339 is subjected to hot melting processing, and simultaneously the plastic fixing column 339 is molded, the heated fixing column 339' has larger contact area with the first bus bar 31 and the second bus bar 32, a plug structure such as a mushroom head is formed, namely a limiting part, the plug structure applies downward pressure to the first bus bar 31 and the second bus bar 32, and the insulating member 33, the first bus bar 31 and the second bus bar 32 are fixed, so that the positive and negative bus bars become an integral bus plate.

For another example, in the second embodiment, the fixing column 339 and the insulating member 33 are separate members, that is, after the first bus bar 31, the second bus bar 32 and the insulating member 33 are positioned, the fixing column 339 is formed into the first positioning slot 311 and the second positioning slot 322 by injection molding, and then the end portion of the fixing column 339 is heated to form a plug structure in a shape of a mushroom head.

For another example, in the third embodiment, the fixing post 339, the limiting portion and the insulating member 33 are integrally formed by injection molding, for example, after the first bus bar 31 and the second bus bar 32 are fixed by a mold, the integral bus bar disk with the insulating member 33, the fixing post 339, the limiting portion, the first bus bar 32 and the second bus bar 32 is directly formed by injection molding.

In some embodiments, the first and second positioning slots 311, 322 mated with the securing post 339 may be a hole slot or arc slot configuration. The structure of the hole and the groove is understood by referring to FIG. 3, and the diameter range of the hole and the groove is preferably 1 mm.ltoreq.phi.ltoreq.5 mm. Arc-shaped slot referring to another embodiment of the first bus bar 31' shown in fig. 6, the first positioning slot 311' has a long arc-shaped slot structure, and a plurality of fixing posts 339 are matched with the first positioning slot 311', so that the insulation member 33 is fixed with the first bus bar 31 and the second bus bar 32 by means of thermal deformation of the fixing posts 339.

Those skilled in the art will appreciate that other channel shapes, such as oval or oblong, for the passage of the securing post 339 therethrough may be employed with the present disclosure.

Preferably, the lower surfaces of the first bus bar piece 31 and the second bus bar piece 32 are lower than the lower surface of the insulating piece 33, so that the contact performance of the bus bar disc and the battery pole core can be ensured, and the yield of the welding machine is improved.

The first bus bar 31, the second bus bar 32, and the positive and negative tabs each include, but are not limited to, the illustrated fan-shaped structure.

A method of manufacturing the integrated manifold plate is described below.

First, the plastic insulator 33 is placed on the tool, and the periphery of the lower surface of the insulator 33 is used as a vertical reference, so that the hole on the isolation protrusion 334 can be used as a horizontal positioning. The first bus bar 31 and the second bus bar 32 are then mounted. The fixing column 339 is assembled with the first positioning groove 311 by positioning the arc-shaped vertical surface 316 of the first bus bar 31 horizontally and positioning the horizontal flange 317 vertically. The fixing column 339 is assembled with the second positioning groove 322 with the connection arc surface 327 and the connection straight surface 323 of the second bus bar 32 as horizontal positioning surfaces and the second epitaxial mounting surface 320 as vertical reference.

The first bus bar 31 and the second bus bar 32 may be mounted in sequence, or may be mounted in sequence without limiting the sequence.

Finally, the fixing column 339 is subjected to hot melting processing, for example, only the mounting column is heated and molded at the same time, so that a mushroom head-shaped plug structure shown in fig. 11B is formed, the fixing of the three is realized, and the manufacture of the integrated confluence disc is completed.

The integrated bus plate is accurate in positioning, welding work can be completed by using the same equipment, the number of parts in the battery assembly process is saved, meanwhile, the assembly process is saved, and the manufacturing efficiency of parts is greatly improved.

In connection with the description of the integrated busway plate above, it may also be connected to an end cap assembly 4. Returning to fig. 1, the end cap assembly 4 is used to cap the battery pole core 2, and includes the above-described integrated buss plate 3 and end cap 5. The end cap 5 includes a pole that is electrically connected with the second bus plate 32 of the integrated bus plate.

One of the first bus bar 31 and the second bus bar 32 of the integrated bus bar 3 is electrically connected to one of the positive electrode tab 21 and the negative electrode tab 22, and the other is electrically connected to the other of the positive electrode tab 21 and the negative electrode tab 22. For example, according to different material characteristics, for a battery made of a steel can material, the second bus bar 32 is electrically connected to the positive electrode tab; for the battery made of aluminum case, the second bus bar 32 is electrically connected to the negative electrode tab.

In the process of connecting the end cover 5 and the integrated bus plate 3, in order to ensure that the end cover 5 and the integrated bus plate 3 are accurately positioned and do not incline, a protrusion 333 shown in fig. 3 is arranged on a part, which is not attached to the horizontal flange 317, of the peripheral wall 338, and the protrusion 333 and the protrusion direction of the isolation protrusion 334 are opposite. The protrusion 333 plays a role of slightly jacking the end cap 5 to compensate for the thickness of the horizontal flange 317, and preferably, the height of the first bus bar 31 is flush with the protrusion 333, so that the plane 5 of the end cap above the integrated bus bar 3 is not inclined and is in the same plane.

In addition, when the horizontal flange 317 is matched with the battery pole core 2, the isolation protrusion 334 on the insulating member of the integrated bus plate 3 can be used as an initial positioning, and the isolation protrusion 334 is placed in the electrode tab region on the battery pole core 2, so that the short circuit risk caused by the displacement of the electrode tab in the later battery use process is prevented.

It should be noted that, in the above description, the azimuth terms such as "front, rear, upper, lower, left, right", "horizontal, vertical, horizontal", and "top, bottom" and the like are generally used to indicate azimuth or positional relationships based on the azimuth or positional relationships shown in the drawings, for the purposes of facilitating description of the present application and simplifying the description, unless otherwise indicated, these directional terms do not indicate or imply that the devices or elements being referred to must have a particular orientation or be constructed and operated in a particular orientation and therefore should not be construed as limiting the scope of protection of the present application; the orientation word "inner and outer" refers to inner and outer relative to the contour of the respective component itself.

While the utility model has been described in terms of preferred embodiments, it is not intended to be limiting, but rather to the utility model, as will occur to those skilled in the art, without departing from the spirit and scope of the utility model. Therefore, any modification, equivalent variation and modification of the above embodiments according to the technical substance of the present utility model fall within the protection scope defined by the claims of the present utility model.

Claims (14)

1. The integrated bus plate is characterized by comprising a first bus plate, a second bus plate, an insulating piece and a fixing column,

the first bus plate comprises a first positioning groove; the second conflux piece includes the second constant head tank, the fixed column be used for with first constant head tank with the cooperation of second constant head tank, the tip of fixed column still includes spacing portion, in order will first conflux piece with the second conflux piece is fixed on the insulating part.

2. The integrated confluence plate of claim 1, wherein an end of the fixing post is provided to be deformable by heat to form the limit portion.

3. The integrated busway plate of claim 1, wherein the fixed posts and the insulator are one or separate pieces.

4. The integrated combiner disk of claim 3, wherein the fixing posts and the limit portions are configured to be injection-moldable.

5. The integrated busway plate of claim 1, wherein the insulator includes an outer peripheral wall and a spacer defining first and second receiving holes isolated from each other for receiving the first and second busway plates, respectively.

6. The integrated combiner disk of claim 5, wherein the spacer comprises spacer protrusions having ventilation openings thereon.

7. The integrated combiner disk of claim 5, wherein the first combiner sheet comprises a first disk bottom surface, a first extended mounting surface provided with the first positioning slot, and an edge wall surface comprising a horizontal flange for fitting the peripheral wall of the insulator and an arcuate elevation for connecting the horizontal flange and the first disk bottom surface.

8. The integrated manifold of claim 7, wherein the first epitaxial mounting surface and the first disk bottom surface are configured to have a height differential.

9. The integrated combiner disk of claim 7, wherein the peripheral wall is provided with protrusions at locations not in contact with the horizontal flange.

10. The integrated combiner disk of claim 5, wherein the second combiner sheet comprises a second disk bottom surface with a hollowed-out portion, a second epitaxial mounting surface provided with the second positioning slot, and a raised extension platform.

11. The integrated busway plate of claim 10, wherein the raised extension platform, the second epitaxial mounting surface, and the second plate bottom surface are configured to have a height differential.

12. The integrated busway of claim 10, wherein the spacer comprises a through-hole and the raised extension platform extends above the through-hole.

13. The integrated combiner disk of claim 1, wherein the first and second positioning slots are hole slots or arc slots.

14. The end cover subassembly for the closing cap battery pole core, battery pole core tip is equipped with anodal utmost point ear and negative pole utmost point ear, its characterized in that, the end cover subassembly includes:

the integrated bus bar of any one of claims 1 to 13, one of a first bus bar and a second bus bar of the integrated bus bar being electrically connected to one of the positive electrode tab and the negative electrode tab, and the other being electrically connected to the other of the positive electrode tab and the negative electrode tab; and

the end cover comprises a pole, and the pole is electrically connected with the second bus plate of the integrated bus plate.