CN213026399U

CN213026399U - Battery module and vehicle with same

Info

Publication number: CN213026399U
Application number: CN202022145293.6U
Authority: CN
Inventors: 朱相展; 周燕飞; 张中林
Original assignee: BYD Co Ltd; Shenzhen BYD Auto R&D Co Ltd
Current assignee: BYD Co Ltd; Shenzhen BYD Auto R&D Co Ltd
Priority date: 2020-09-25
Filing date: 2020-09-25
Publication date: 2021-04-20
Anticipated expiration: 2030-09-25

Abstract

The utility model is suitable for a power battery and vehicle technical field disclose a battery module and have vehicle of this battery module. The battery module comprises a battery cell array, side plates, end plates, connecting pieces and locking pieces, wherein the side plates are arranged on two sides of the first direction of the battery cell array, the end plates are arranged on two sides of the second direction of the battery cell array, the first direction and the second direction are vertical, the connecting pieces comprise welding walls and embedding parts arranged on two sides of the welding walls, the welding walls are arranged on the outer surfaces of the end plates in the second direction, the end plates are provided with embedding grooves, the embedding parts are inserted into the embedding grooves, and the side plates are welded with the welding walls in an attached mode; the end plate is provided with the locking hole, and the connecting piece is equipped with the upset portion that is located the locking hole top, and the retaining member passes upset portion and inserts in the locking hole to it is fixed with the end plate. The vehicle is provided with the battery module. The utility model provides a battery module and have vehicle of this battery module, end plate and curb plate can reliably be connected, and low in production cost.

Description

Battery module and vehicle with same

Technical Field

The utility model belongs to the technical field of power battery and vehicle, especially, relate to a battery module and have vehicle of this battery module.

Background

The battery module used as the power battery is generally provided with a peripheral frame, and an end plate and a side plate play a role in restraining and fixing each battery unit, and the connection mode of the end plate and the side plate is related to the structural reliability of the battery module. At present, the connection mode of the end plate and the side plate of the battery module mainly comprises welding, screw connection or rivet connection. The choice of the connection mode is often determined by the materials of the end plates and the side plates. When the end plates and the side plates are made of the same material, if the end plates and the side plates are made of aluminum or steel, the end plates and the side plates can be welded or bolts/rivets can be adopted. When the end plate and the side plate are made of different materials, such as an aluminum end plate and a steel side plate, the two materials cannot be welded due to large melting point difference (the melting point of aluminum is 660 ℃, and the melting point of steel is about 1500 ℃), and generally, the two materials can only be fixed through screw/rivet connection, and the connection reliability is poor.

SUMMERY OF THE UTILITY MODEL

The utility model discloses aim at solving one of above-mentioned technical problem at least, provide a battery module and have vehicle of this battery module, its end plate and curb plate can reliably be connected, and low in production cost.

The technical scheme of the utility model is that: a battery module comprises a battery cell array, side plates and end plates, wherein the side plates are arranged on two sides of the battery cell array in a first direction, the end plates are arranged on two sides of the battery cell array in a second direction, the first direction is perpendicular to the second direction, the battery module further comprises a connecting piece and a locking piece, the connecting piece comprises a welding wall and embedding parts arranged on two sides of the welding wall, the welding wall is arranged on the outer surface of the end plate in the second direction, the end plate is provided with an embedding groove, the embedding parts are inserted into the embedding groove, and the side plates are welded with the welding wall in an attaching mode; the end plate is provided with and is used for supplying locking piece male locking hole, the connecting piece is equipped with and is located the upset portion of locking hole top, the retaining member passes upset portion inserts in the locking is downthehole, with incite somebody to action the connecting piece with the end plate is fixed.

Optionally, the side plate has a bent edge that abuts an outer side of the welding wall.

Optionally, the embedded groove is disposed along a third direction of the end plate and penetrates from the upper end surface to the lower end surface.

Optionally, each end plate is connected with two connecting pieces respectively welded with two side plates; or each end plate is connected with one connecting piece welded with the two side plates.

Optionally, the end plate is provided with a locking hole between the two embedded grooves corresponding to each connecting piece, and each connecting piece is connected to the end plate through a locking piece; or, the end plate is provided with two corresponding every connecting piece and is located two the locking hole outside the embedded groove, every the connecting piece through two retaining member connect in the end plate.

Optionally, the turning part is integrally formed on the welding wall in a bending mode, the turning part is attached to the end face of the end plate where the locking hole is located, and the turning part is provided with a through hole for the locking piece to penetrate through.

Optionally, the locking member includes a bolt and a nut, the bolt passes through the through hole and the locking hole, and the nut is in threaded connection with the bolt and locked to the lower end surface of the locking hole.

Optionally, the cross section of the embedded groove along the first direction is bent, and the shape of the cross section of the embedded portion along the first direction is matched with the shape of the embedded groove.

Optionally, the side plates and the connecting piece are made of steel; and/or the end plate is made of aluminum.

The utility model also provides a vehicle, the vehicle has foretell battery module.

The utility model provides a battery module and have vehicle of this battery module, the both sides of welding wall all are provided with the embedding part, the embedding part can be pegged graft in the embedded groove of end plate, and through the retaining member that sets up upset portion and correspond, can make the spacing of connecting piece more reliable, even long-term, acutely shake, jolt the environment under, the connecting piece still can be connected with end plate stabilization reliably, the battery module meets and is difficult for the roll-off dislocation when vibration is violent from top to bottom, the reliability of battery module is good, and connecting piece and end plate can need not machine tooling, low in production cost.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to these drawings without creative efforts.

Fig. 1 is a schematic perspective view illustrating a battery module according to an embodiment of the present invention;

fig. 2 is a schematic exploded perspective view of an end plate, a connecting member and a locking member of a battery module according to an embodiment of the present invention;

fig. 3 is a schematic perspective view illustrating a connecting member in a battery module according to an embodiment of the present invention;

fig. 4 is a schematic perspective view of another view angle of a connecting member in a battery module according to an embodiment of the present invention;

fig. 5 is a schematic perspective view of an end plate in a battery module according to an embodiment of the present invention;

fig. 6 is a top view of an end plate in a battery module according to an embodiment of the present invention;

fig. 7 is a schematic perspective view illustrating another connecting member in a battery module according to an embodiment of the present invention;

fig. 8 is an exploded perspective view of an end plate and another connecting member in a battery module according to an embodiment of the present invention.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

It should be noted that the terms "disposed" and "connected" should be interpreted broadly, and may be, for example, directly disposed or connected, or indirectly disposed or connected through intervening elements or intervening structures.

In addition, in the embodiments of the present invention, if there are terms of orientation or positional relationship indicated by "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., it is based on the orientation or positional relationship shown in the drawings or the conventional placement state or use state, and it is only for convenience of description and simplification of description, but does not indicate or imply that the structures, features, devices or elements referred to must have a specific orientation or positional relationship, nor must be constructed and operated in a specific orientation, and therefore, should not be construed as limiting the present invention. In the description of the present invention, "a plurality" means two or more unless otherwise specified.

The various features and embodiments described in the detailed description may be combined in any suitable manner, for example, different embodiments may be formed by combining different features/embodiments, and various combinations of features/embodiments are not separately described in order to avoid unnecessary repetition in the present disclosure.

As shown in fig. 1 to fig. 3, an embodiment of the present invention provides a battery module, including a cell array 90, a side plate 10 and an end plate 20, the side plate 10 is disposed on two sides of a first direction (i.e., an X direction in fig. 1) of the cell array 90, the end plate 20 is disposed on two sides of a second direction (i.e., a Y direction in fig. 1) of the cell array 90, the first direction is perpendicular to the second direction, the battery module further includes a connecting member 30 and a locking member 40, the connecting member 30 includes a welding wall 31 and an embedding portion 32 disposed on two sides of the welding wall 31, the welding wall 31 is disposed on an outer surface of the end plate 20 in the second direction. The end plate 20 is provided with an embedded groove 201, the embedded part 32 is inserted into the embedded groove 201, and the side plate 10 is welded to the welding wall 31; the end plate 20 is provided with the locking hole 202 that is used for supplying locking piece 40 to insert, the connecting piece 30 is equipped with and is located the upset portion 33 of locking hole 202 top, the locking piece 40 passes upset portion 33 inserts in locking hole 202, with will the connecting piece 30 with the end plate 20 is fixed. The both sides of welding wall 31 all are provided with embedding part 32, and embedding part 32 can be pegged graft in end plate 20's embedded groove 201, and through setting up upset portion 33 and the retaining member 40 that corresponds, can make connecting piece 30 spacing more reliable, even under long-term, violent vibrations, the environment of jolting, connecting piece 30 still can be reliably with end plate 20 remain stable connection, the battery module meets and is difficult for the roll-off dislocation when vibration is violent from top to bottom, the reliability of battery module is good.

For convenience of description, one surface of the side plate 10, the end plate 20 and the connecting member 30 facing the cell array 90 is defined as an inner side surface, and the other surface of the side plate 10, the end plate 20 and the connecting member 30 is an outer side surface. Specifically, the side plate 10 has a bent side 11 attached to the outer side of the welding wall 31, and the inner side of the bent side 11 can be welded to the outer side of the welding wall 31, which facilitates the welding process.

Specifically, as shown in fig. 1 to 6, the insertion groove 201 is disposed along a third direction (i.e., a Z direction in fig. 1) of the end plate 20, and the insertion groove 201 may penetrate from an upper end surface of the end plate 20 to a lower end surface of the end plate 20, the third direction is perpendicular to the first direction and the second direction, and the connection reliability between the connection member 30 and the end plate 20 is high by the engagement of the insertion groove 201 and the insertion portion 32 and the engagement of the reversed portion 33 and the locking member 40. The end plate 20 may be manufactured by extrusion, for example, an aluminum profile may be used, which has high strength, light weight and low application cost.

Specifically, as shown in fig. 1 and 2, each of the end plates 20 is connected with two of the connecting members 30 respectively welded to the two side plates 10, the two connecting members 30 can be respectively disposed near both ends of the end plate 20 in the first direction (X direction in fig. 1), and the length of the bent side 11 can be set to be short, as an alternative embodiment, a welding seam is disposed between the bent sides 11 of the two side plates 10, that is, the welding seam can simultaneously weld the edges of the bent sides 11 of the two side plates 10 to the welding wall 31, so that only two of the end plates 20 and the connecting members 30 need to be disposed in each battery module.

Alternatively, as shown in fig. 7 and 8, as another possible embodiment, each of the end plates 20 may be connected with one of the connecting members 30 welded to the two side plates 10, the connecting member 30 may be disposed at a position where the end plate 20 is centered in the first direction (X direction in fig. 1), that is, the welding wall 31 may be disposed at a position where the outer side surface of the end plate 20 is centered in the first direction (X direction in fig. 1), the bent edges 11 of the two side plates 10 each extend to the outer surface of the connecting member 30, and the bent edges 11 of the two side plates 10 may be overlapped or not overlapped.

Specifically, the end plate 20 is provided with a locking hole 202 between two of the fitting grooves 201 corresponding to each of the connecting members 30, and each of the connecting members 30 is connected to the end plate 20 by a locking member 40.

Alternatively, as shown in fig. 7 and 8, as another possible embodiment, the end plate 20 is provided with two locking holes 202 outside the two insertion grooves 201 corresponding to each of the connecting members 30, and each of the connecting members 30 is connected to the end plate 20 by two locking members 40, which is more structurally reliable.

Specifically, the side plates 10 and the connecting members 30 may be made of the same or different materials.

In this embodiment, the side plate 10 and the connecting member 30 may be made of steel, which is convenient for welding, and the steel side plate 10 may bear a larger battery expansion force.

In this embodiment, the end plate 20 may be made of aluminum, which has high strength and light weight.

Specifically, the turning part 33 is integrally formed on the welding wall 31 in a bending manner, the turning part 33 is attached to the end face of the end plate 20 where the locking hole 202 is located, and the turning part 33 is provided with a through hole for the locking member 40 to pass through. The turning part 33 can be annular, and the turning part 33 is not easy to loosen and has high structural reliability. It is to be understood that the turning part 33 may have a suitable shape such as a semicircular shape or an open frame shape.

Specifically, the locking member 40 includes a bolt 41 and a nut 42, the bolt 41 passes through the through hole and the locking hole 202, and the nut 42 is screwed to the bolt 41 and locked to the lower end surface of the locking hole 202. The head of the bolt 41 presses the turning part 33 against the upper end face of the end plate 20, the nut 42 is in threaded connection with the bolt 41 and is locked on the lower end face of the end plate 20, gaskets can be additionally arranged between the nut 42 and the lower end face of the end plate 20 and between the head of the bolt 41 and the turning part 33, the gaskets can be elastic gaskets, and one or more gaskets can be arranged.

Specifically, as shown in fig. 6 and 7, a cross section of the insertion groove 201 in the first direction is bent, and a cross section of the insertion portion 32 in the first direction is matched with the shape of the insertion groove 201. For example, in the present embodiment, the cross section of the insertion groove 201 is "L" shaped, but the cross section of the insertion groove 201 may be "T" shaped, arc-shaped, linear, or the like.

The utility model also provides a vehicle, the vehicle has foretell battery module. The vehicle can be a pure electric vehicle or a hybrid vehicle and the like.

The embodiment of the utility model provides a battery module and have vehicle of this battery module, battery module have about side (as the X direction in fig. 1), preceding rear end face (as the Y direction in fig. 1) and go up top surface, bottom surface, two curb plates 10 set up in the side of controlling of battery module, two end plates 20 set up in the terminal surface around the battery module, curb plate 10 and end plate 20 surround around electric core array 90. Both ends of the side plate 10 are respectively welded to the corresponding connecting members 30, the end plate 20 is provided with an insertion groove 201 and a locking hole 202, the connecting members 30 are assembled by inserting the insertion groove 201 of the end plate 20 along the module height direction, both sides of each connecting member 30 are provided with insertion portions 32, each two insertion grooves 201 respectively provide insertion positions for the two insertion portions 32 on the connecting member 30, and the connecting member 30 is fixed in the height direction (Z direction) by bolts 41 (for example, bolts of M6). The end plate 20 can be made by aluminum extrusion and machining, and the connecting member 30 can be formed by steel stamping without additional machining processes, so that the structure is simpler and the assembly is easier. The insertion portion 32 is inserted into the insertion groove 201, and restrains the expansion of the battery by cooperating with the end plate 20, and a contact area of the outer side surface of the welding wall 31 and the bent edge 11 of the side plate 10 may be a welding area of penetration welding or seam welding. The lower surface of the turning part 33 is in contact with the end plate 20, and then the bolt 41 passes through the through hole to fix the connecting piece 30 (welding insert block) in the height direction (Z direction in figure 1), so that the strength of resisting Z-direction vibration is increased. The connecting piece 30 and the embedded groove 201 have lower requirement on positioning precision and are easy to assemble; the connecting member 30 and the end plate 20 generally do not require additional machining, and the machining process is simple, thereby being beneficial to reducing the cost and improving the production efficiency.

The above description is only exemplary of the present invention and should not be taken as limiting the scope of the present invention, as any modification, equivalent replacement or improvement made within the spirit and principle of the present invention should be included in the present invention.

Claims

1. A battery module comprises a battery cell array, side plates and end plates, wherein the side plates are arranged on two sides of the battery cell array in a first direction, the end plates are arranged on two sides of the battery cell array in a second direction, and the first direction is perpendicular to the second direction; the end plate is provided with and is used for supplying locking piece male locking hole, the connecting piece is equipped with and is located the upset portion of locking hole top, the retaining member passes upset portion inserts in the locking is downthehole, with incite somebody to action the connecting piece with the end plate is fixed.

2. The battery module according to claim 1, wherein the side plates have bent edges attached to the outer sides of the welding walls.

3. The battery module according to claim 1, wherein the insertion groove is provided in the third direction of the end plate and penetrates from the upper end surface to the lower end surface.

4. The battery module according to claim 1, wherein each of the end plates is connected with two of the connecting members welded to the two side plates, respectively; or each end plate is connected with one connecting piece welded with the two side plates.

5. The battery module according to claim 1, wherein the end plate is provided with a locking hole between the two fitting grooves corresponding to each connecting member, each connecting member being connected to the end plate by a locking member; or, the end plate is provided with two corresponding every connecting piece and is located two the locking hole outside the embedded groove, every the connecting piece through two retaining member connect in the end plate.

6. The battery module according to any one of claims 1 to 5, wherein the turnover part is integrally formed on the welding wall in a bending manner, the turnover part is attached to the end face of the end plate where the locking hole is located, and the turnover part is provided with a through hole for the locking member to pass through.

7. The battery module according to claim 6, wherein the locking member includes a bolt passing through the through-hole and the locking hole and a nut threadedly coupled to the bolt and locked to a lower end surface of the locking hole.

8. The battery module according to any one of claims 1 to 5, wherein the insertion groove is bent in a cross-sectional shape in the first direction, and the cross-sectional shape of the insertion portion in the first direction is matched with the shape of the insertion groove.

9. The battery module according to any one of claims 1 to 5, wherein the side plates and the connecting members are made of steel; and/or the end plate is made of aluminum.

10. A vehicle characterized by having a battery module according to any one of claims 1 to 9.