CN221080271U - Babbing subassembly and battery module - Google Patents

Abstract

The utility model discloses a tab assembly and a battery module, and relates to the technical field of battery modules. The tab assembly comprises a base, a tab and an upper cover, wherein the base is provided with at least two pole holes in a penetrating mode, and the pole holes are used for enabling poles of a power supply core to penetrate through; the tabs are used for welding with one end of the pole penetrating through the pole hole; the upper cover is used for being connected with the base to enclose into the accommodation space of holding the bat jointly. The tab assembly provided by the utility model can reliably protect the tab and reduce the risk of short circuit failure of the high-voltage circuit of the battery module.

Description

Babbing subassembly and battery module

Technical Field

The utility model relates to the technical field of battery modules, in particular to a tab assembly and a battery module.

Background

At present, a plurality of battery cells are commonly connected in series and parallel in a battery module on the market through welding a tab and a battery cell pole.

The tabs of the battery module are usually exposed in the module box, and under the condition of poor sealing performance of the module box, the tabs are extremely easy to cause short circuit failure of a high-voltage loop due to surface drip, conductive particle medium adhesion and the like.

Disclosure of utility model

The utility model aims to provide a tab assembly which can reliably protect a tab and reduce the risk of short-circuit failure of a high-voltage loop.

Another object of the present utility model is to provide a battery module having the characteristics of higher safety.

The embodiment of the utility model provides a technical scheme that:

A wafer assembly comprising:

The base is provided with at least two pole holes in a penetrating mode, and the pole holes are used for enabling poles of the power supply core to penetrate through;

The tab is used for being welded with one end of the pole penetrating through the pole hole;

The upper cover is used for being connected with the base to jointly enclose into a containing space for containing the tabs.

Further, the base is provided with a mounting surface and a matching surface which are oppositely arranged, the matching surface is concavely provided with a matching recess for accommodating the tab, the post hole extends from the mounting surface to the bottom wall of the matching recess, and the upper cover is used for sealing the matching recess to form the accommodating space.

Further, a limiting boss is convexly arranged on the bottom wall of the matched recess, and the limiting boss is used for positioning the tab;

The wire passing groove is formed in the side wall of the matching recess in a penetrating mode and used for leading out a sampling wire harness of the acquisition terminal welded on the tab.

Further, a flange is arranged on the mounting surface along the periphery of the orifice in a protruding mode, and the flange is used for being matched with the battery cell so as to mount the base on the battery cell.

Further, at least two positioning depressions are concavely arranged on one side of the tab in the thickness direction, and the positioning depressions are used for being inserted into one end of the pole penetrating through the pole hole.

Further, a welding hole penetrating through the tab is formed in the bottom wall of the positioning recess, a welding ring groove is concavely formed in one side, away from the positioning recess, of the tab in the thickness direction, and the welding ring groove surrounds the welding hole.

Further, a clamping groove is formed in the side wall of the base in a surrounding mode, a skirt edge is arranged on the periphery of the upper cover, protruding ribs are arranged on the inner side wall of the skirt edge in a surrounding mode, and the protruding ribs are used for being embedded with the clamping groove.

Further, an elastic buffer block is arranged on one side of the upper cover and used for pressing and holding the acquisition terminal welded on the tab.

The embodiment of the utility model also provides a battery module, which comprises a tab assembly and a plurality of electric cores, wherein the tab assembly comprises a base, a tab and an upper cover, the base is connected with the upper cover and encloses a containing space together, and the tab is contained in the containing space;

The base is provided with a plurality of pole holes, the accommodating space is communicated with the outside through the plurality of pole holes, and one pole of each of the plurality of battery cores extends into the accommodating space through one pole hole to be welded with the tabs.

Further, the base is provided with a mounting surface, one end orifice of each of the plurality of pole holes is arranged on the mounting surface, a flanging is convexly arranged on the mounting surface along the periphery of each orifice, a caulking groove is concavely arranged on the battery core along the periphery of the pole, and the flanging is jogged with the caulking groove.

Compared with the prior art, in practical application, the tab assembly provided by the embodiment of the utility model has the advantages that after the welding of the tab and the pole is completed, the upper cover is connected to the base, so that the tab is accommodated in the accommodating space defined by the base and the upper cover. The tabs are protected by the base and the upper cover, so that the conditions of surface drip, conductive particle medium adhesion and the like can be avoided. Therefore, the beneficial effects of the present utility model include: the safety protection device can reliably protect the tabs and reduce the risk of short circuit failure of the high-voltage circuit of the battery module.

Drawings

In order to more clearly illustrate the technical solution of the embodiments of the present utility model, the drawings that are required to be used in the embodiments will be briefly described. It is appreciated that the following drawings depict only certain embodiments of the utility model and are therefore not to be considered limiting of its scope. Other relevant drawings may be made by those of ordinary skill in the art without undue burden from these drawings.

Fig. 1 is a schematic view illustrating a part of a structure of a battery module according to an embodiment of the present utility model;

FIG. 2 is a schematic view of a structure of a base at a first view angle;

FIG. 3 is a schematic view of the structure of the base at a second view angle;

Fig. 4 is a schematic structural diagram of a cell;

FIG. 5 is an enlarged schematic view of area A of FIG. 4;

FIG. 6 is a schematic view of a structure of a tab at a first viewing angle;

FIG. 7 is a schematic view of the structure of the tab at a second viewing angle;

fig. 8 is a schematic structural view of the upper cover at a first view angle;

fig. 9 is a schematic structural view of the upper cover at a second view angle.

Icon: 10-a battery module; 20-an electric core; 21-pole; 22-caulking groove; a 100-wafer assembly; 110-a base; 111-pole holes; 112-mounting surface; 1121-flanging; 113-mating recess; 114-limiting bosses; 115-wire passing groove; 116-clamping grooves; 120-bard; 121-positioning the recess; 122-welding holes; 123-welding ring grooves; 130-upper cover; 131-skirt; 132-ribs; 133-resilient buffer.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present utility model more clear, the technical solutions of the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model. It will be apparent that the described embodiments are some, but not all, embodiments of the utility model. The components of the embodiments of the present utility model generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.

Thus, the following detailed description of the embodiments of the utility model, as presented in the figures, is not intended to limit the scope of the utility model, as claimed, but is merely representative of selected embodiments of the utility model. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

It should be noted that: like reference numerals and letters denote like items in the following figures, and thus once an item is defined in one figure, no further definition or explanation thereof is necessary in the following figures.

In the description of the present utility model, it should be understood that the directions or positional relationships indicated by the terms "upper", "lower", "inner", "outer", "left", "right", etc. are based on the directions or positional relationships shown in the drawings, or the directions or positional relationships conventionally put in place when the inventive product is used, or the directions or positional relationships conventionally understood by those skilled in the art are merely for convenience of describing the present utility model and simplifying the description, and do not indicate or imply that the apparatus or elements referred to must have a specific direction, be configured and operated in a specific direction, and therefore should not be construed as limiting the present utility model.

Furthermore, the terms "first," "second," and the like, are used merely to distinguish between descriptions and should not be construed as indicating or implying relative importance.

In the description of the present utility model, it should also be noted that, unless explicitly specified and limited otherwise, terms such as "disposed," "connected," and the like are to be construed broadly, and for example, "connected" may be either fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art according to the specific circumstances.

The following describes specific embodiments of the present utility model in detail with reference to the drawings.

Examples

Referring to fig. 1 in combination, fig. 1 is a schematic view showing a part of the structure of a battery module 10 according to the present embodiment.

The battery module 10 provided in this embodiment includes a plurality of battery cells 20 and a plurality of tab assemblies 100, the battery cells 20 are sequentially arranged, the tab assemblies 100 are composed of tabs 120 and protection structures thereof, the tabs 120 of the plurality of tab assemblies 100 are welded with the poles 21 of the plurality of battery cells 20, high-voltage loop conduction of the battery module 10 is realized, and corresponding protection of the plurality of tabs 120 is realized by the protection structures of the plurality of tab assemblies 100.

It is to be understood that the battery module 10 provided by the present application further includes conventional components such as a module case and CCS assembly, which are not described in the present embodiment.

In this embodiment, the patch assembly 100 includes a base 110, a patch 120 and an upper cover 130, the base 110 and the upper cover 130 form a protective structure of the patch 120, the base 110 and the upper cover 130 are connected and jointly enclose a containing space, and the patch 120 is contained in the containing space. The base 110 is provided with a plurality of pole holes 111, the accommodating space is communicated with the outside through the plurality of pole holes 111, and one pole 21 of each of the plurality of battery cells 20 extends into the accommodating space through one pole hole 111 to be welded with the tab 120.

In practice, the base 110 is provided with a plurality of post holes 111 therethrough, the post holes 111 being used for passing through the posts 21 of the power supply core 20; the tab 120 is used for welding with one end of the pole 21 passing through the pole hole 111; the upper cover 130 is used for being connected with the base 110 to jointly enclose a containing space for containing the tab 120.

In practical application, after the welding of the tab 120 and the pole 21 is completed, the upper cover 130 is connected to the base 110, so that the tab 120 is accommodated in the accommodating space defined by the base 110 and the upper cover 130. The tab 120 is protected by the base 110 and the upper cover 130, so that the conditions such as surface dripping and adhesion of conductive particle media can be avoided. Therefore, the tab assembly 100 provided by the utility model can reliably protect the tab 120, and reduce the risk of short-circuit failure of the high-voltage circuit of the battery module 10.

Referring to fig. 2 and fig. 3 in combination, fig. 2 is a schematic structural diagram of the base 110 at a first viewing angle, and fig. 3 is a schematic structural diagram of the base 110 at a second viewing angle.

In this embodiment, two pole holes 111 are formed through the base 110, the base 110 has a mounting surface 112 and a mating surface that are disposed opposite to each other, and the pole holes 111 extend from the mounting surface 112 to the mating surface. In the actual assembly process, each of the two adjacent battery cells 20 has one of the poles 21 passing through the two pole holes 111 to reach the corresponding side of the mating surface of the base 110. And then welding the corresponding side of the matching surface of the tab 120 with the two battery cells 20 respectively, and connecting the upper cover 130 with the base 110 to form a containing space after the welding is completed, so that the tab 120 is contained in the containing space.

In fact, the mating surface of the base 110 is concavely provided with a mating recess 113 for receiving the tab 120, the post hole 111 extends from the mounting surface 112 to the bottom wall of the mating recess 113, and the upper cover 130 is used for sealing the mating recess 113 to form a receiving space.

In practical application, after the terminal 21 of the battery core 20 extends into the terminal hole 111 from the side of the mounting surface 112 of the base 110 to reach the mating recess 113, the tab 120 is filled into the mating recess 113 to contact with the terminal 21 and welded. In order to achieve quick positioning of the tab 120 in the mating recess 113, in this embodiment, a limiting boss 114 is protruding from the bottom wall of the mating recess 113.

In practice, the number of the limiting bosses 114 is multiple, and the limiting bosses 114 are respectively positioned at multiple corners of the matching recess 113 to jointly support the tab 120, so that the quick positioning of the tab 120 is realized, and the assembly efficiency is improved.

The side wall of the matching recess 113 is provided with a wire passing groove 115 in a penetrating manner, and the wire passing groove 115 is used for leading out a sampling wire harness of the acquisition terminal welded on the tab 120. In fact, the collecting terminal is welded on the tab 120, and the sampling wire harness of the collecting terminal is led out of the accommodating space through the wire passing groove 115 and finally is connected into the management system of the battery module 10, so that the management system can collect the voltage information of each battery cell 20 conveniently.

Referring to fig. 4 and 5 in combination, fig. 4 is a schematic structural diagram of the battery cell 20, and fig. 5 is an enlarged schematic diagram of the region a in fig. 4.

The mounting surface 112 is provided with flanges 1121 along the periphery of each hole, the periphery of the pole 21 on the battery cell 20 is provided with a caulking groove 22 in a concave manner, and the flanges 1121 are embedded with the caulking groove 22 to realize the mounting and fixing of the base 110 on the battery cell 20.

It is understood that the pole 21 and the caulking groove 22 are both disposed on the top cover assembly of the battery cell 20. During the actual assembly process, the mounting face 112 gradually approaches the top cap assembly of the battery cell 20 during the insertion of the respective one of the poles 21 of the two battery cells 20 into the two pole holes 111 on the mounting face 112. Because the flange 1121 is raised compared to the mounting surface 112, it is ensured that the flange 1121 is already inserted into the bezel 22 before the mounting surface 112 is attached to the header assembly, ensuring reliable mounting of the base 110 on the battery cell 20.

It should be noted that, in other embodiments, the connection manner between the base 110 and the battery cell 20 may be adaptively adjusted. For example, the base 110 may be adhered to, snap-fit with, etc. the battery cells 20.

Referring to fig. 6 and fig. 7 in combination, fig. 6 is a schematic structural view of the patch 120 at a first viewing angle, and fig. 7 is a schematic structural view of the patch 120 at a second viewing angle.

In order to ensure quick positioning of the tab 120 and the pole 21, further improving assembly efficiency, in this embodiment, a plurality of positioning recesses 121 are concavely disposed on one side of the tab 120 in the thickness direction, and the positioning recesses 121 are used for inserting with one end of the pole 21 passing through the pole hole 111.

It can be understood that the number of the positioning recesses 121 corresponds to the number of the post holes 111, and after the tabs 120 are filled into the matching recesses 113, the positioning recesses 121 are in one-to-one correspondence with the post holes 111, and the positioning recesses 121 are respectively inserted into the posts 21 passing through the post holes 111, so that rapid and accurate matching between the posts 21 and the tabs 120 is realized, and the subsequent welding precision is improved.

Moreover, by inserting the positioning recess 121 into the pole 21, the contact area between the pole 21 and the tab 120 can be increased, so that the temperature rise of the contact surface between the tab 120 and the pole 21 can be reduced, and the performance of the battery module 10 can be improved.

The bottom wall of the positioning recess 121 is provided with a welding hole 122 penetrating through the tab 120, one side of the tab 120, which is away from the positioning recess 121 in the thickness direction, is concavely provided with a welding ring groove 123, and the welding ring groove 123 surrounds the welding hole 122.

Because the welding part of the laser welding device has uneven scars when the tab 120 is welded, if the scars are left on the surface of the tab 120, the whole surface of the tab 120 is not smooth, and in the process of carrying and assembling the battery module 10, the tab 120 and other parts are scratched, so that welding failure is easy to occur and scratches are easily caused on the surfaces of other parts. In this embodiment, a welding ring groove 123 surrounding the welding hole 122 is concavely formed on the tab 120, and the welding ring groove 123 is used as a welding path, so that the generated welding slag can be left in the welding ring groove 123, thereby ensuring the smoothness of the surface of the tab 120.

In the present embodiment, the same weld hole 122 corresponds to two weld ring grooves 123, the two weld ring grooves 123 are disposed concentrically with the weld hole 122, and the weld ring groove 123 located at the outermost side encloses both the weld ring groove 123 located at the inner side and the weld hole 122. The two welding ring grooves 123 can further improve the welding reliability between the tab 120 and the post 21, thereby reducing the risk of the tab 120 being unwelded.

Referring to fig. 8 and fig. 9 in combination, fig. 8 is a schematic structural view of the upper cover 130 at a first viewing angle, and fig. 9 is a schematic structural view of the upper cover 130 at a second viewing angle.

In this embodiment, a clamping groove 116 is formed on the side wall of the base 110 in a surrounding manner, a skirt 131 is arranged on the periphery of the upper cover 130, a rib 132 is formed on the inner side wall of the skirt 131 in a surrounding manner, and the rib 132 is used for being embedded with the clamping groove 116.

In practical application, when the upper cover 130 is connected with the base 110, the upper cover 130 is only required to be fastened to the base 110, so that the ribs 132 on the inner side wall of the skirt 131 are embedded into the clamping grooves 116 on the side wall of the base 110. In order to ensure smooth engagement between the protruding rib 132 and the clamping groove 116, in this embodiment, the contact positions between the protruding rib 132 and the clamping groove 116 are chamfered.

In other embodiments, a raised structure may be provided on the sidewall of the base 110 and a recessed structure may be provided on the inner sidewall of the skirt 131 of the upper cover 130. Alternatively, other connection structures may be used to connect the upper cover 130 to the base 110.

In addition, in this embodiment, the upper cover 130 is further provided with an elastic buffer block 133 on the same side of the skirt 131, and the elastic buffer block 133 is used for pressing and holding the collecting terminal welded on the tab 120. It will be appreciated that the position of the elastic buffer block 133 corresponds to the position of the collecting terminal on the tab 120, and when the upper cover 130 is fastened to the base 110, the elastic buffer block 133 applies pressure to the collecting terminal toward the tab 120, so as to reduce the risk of the collecting terminal being unwelded.

In summary, in the patch assembly 100 provided in the present embodiment, the base 110 and the upper cover 130 cooperate to define a space for accommodating the patch 120, so as to effectively protect the patch 120. The beneficial effects of the tab assembly 100 are benefited, and the battery module 10 provided in this embodiment has the characteristics of lower risk of short-circuit failure of the high-voltage circuit and higher safety.

The above description is only of the preferred embodiments of the present utility model and is not intended to limit the present utility model, but various modifications and variations can be made to the present utility model by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present utility model should be included in the protection scope of the present utility model.

Claims (10)

1. A tab assembly comprising:

The base (110), the base (110) is provided with at least two pole holes (111) in a penetrating way, and the pole holes (111) are used for enabling poles (21) of the power supply core (20) to penetrate through;

A tab (120), the tab (120) being for welding with an end of the pole (21) passing through the pole hole (111);

The upper cover (130), the upper cover (130) is used for being connected with the base (110) so as to enclose together the accommodation space for accommodating the tabs (120).

2. The tab assembly of claim 1, wherein the base (110) has a mounting surface (112) and a mating surface disposed opposite each other, the mating surface being recessed with a mating recess (113) for receiving the tab (120), the post hole (111) extending from the mounting surface (112) to a bottom wall of the mating recess (113), the upper cover (130) for closing the mating recess (113) to form the receiving space.

3. The tab assembly of claim 2, wherein the bottom wall of the mating recess (113) is provided with a protruding stop boss (114), the stop boss (114) being used for positioning the tab (120);

The side wall of the matching recess (113) is provided with a wire passing groove (115) in a penetrating mode, and the wire passing groove (115) is used for leading out a sampling wire harness of the acquisition terminal welded on the tab (120).

4. The tab assembly of claim 2, wherein the mounting surface (112) is provided with a flange (1121) protruding along the periphery of the aperture of the post hole (111), the flange (1121) being adapted to cooperate with the battery cell (20) to mount the base (110) on the battery cell (20).

5. The tab assembly according to claim 1, wherein one side of the tab (120) in the thickness direction is concavely provided with at least two positioning recesses (121), the positioning recesses (121) being adapted to be inserted with one end of the pole (21) passing through the pole hole (111).

6. The tab assembly of claim 5, wherein a bottom wall of the positioning recess (121) is provided with a welding hole (122) penetrating the tab (120), a side of the tab (120) facing away from the positioning recess (121) in a thickness direction is concavely provided with a welding ring groove (123), and the welding ring groove (123) encloses the welding hole (122).

7. The tab assembly of claim 1, wherein a clamping groove (116) is formed in the side wall of the base (110) in a surrounding manner, a skirt edge (131) is arranged on the periphery of the upper cover (130), a protruding rib (132) is formed in the inner side wall of the skirt edge (131) in a surrounding manner, and the protruding rib (132) is used for being embedded into the clamping groove (116).

8. The tab assembly of claim 1, wherein one side of the upper cover (130) is provided with an elastic buffer block (133), the elastic buffer block (133) being used for holding the acquisition terminal welded on the tab (120).

9. The battery module is characterized by comprising a tab assembly (100) and a plurality of electric cores (20), wherein the tab assembly (100) comprises a base (110), a tab (120) and an upper cover (130), the base (110) and the upper cover (130) are connected and jointly enclose a containing space, and the tab (120) is contained in the containing space;

A plurality of pole holes (111) are formed in the base (110), the accommodating space is communicated with the outside through the plurality of pole holes (111), and one pole (21) of each of the plurality of battery cores (20) extends into the accommodating space through one pole hole (111) and is welded with the tab (120).

10. The battery module according to claim 9, wherein the base (110) has a mounting surface (112), one end hole opening of each of the plurality of pole holes (111) is provided on the mounting surface (112), a flange (1121) is provided on the mounting surface (112) along the periphery of each hole, a caulking groove (22) is provided on the battery cell (20) along the periphery of the pole (21), and the flange (1121) is fitted into the caulking groove (22).