CN212062538U - Battery case and battery pack - Google Patents

Abstract

The application provides a battery case for accept electric core module and circuit board, including first casing, second casing and connecting portion, first casing includes first edge portion. The second shell comprises a second edge portion corresponding to the first edge portion, and a gap is arranged between the first edge portion and the second edge portion. The connecting portion is arranged on the second shell and located in the gap, and the connecting portion is connected with the first edge portion and the second edge portion. The application still relates to a group battery, adopts foretell battery case, can directly fix two casings, need not to adopt other fasteners, convenient operation and reduce cost.

Description

Battery case and battery pack

Technical Field

The application relates to the technical field of batteries, in particular to a battery shell and a battery pack.

Background

Fixing the battery core module through the shell is an indispensable process in the process of manufacturing the battery. Usually the casing is when fixed battery module, is two casings through acceping electric core module, with electric core module fixed back, two casings are fixed to rethread screw or with the form of glue cooperation draw-in groove. However, the screw fixation requires more space for fixation, the automation is difficult to realize, and the time required for curing through glue is longer.

SUMMERY OF THE UTILITY MODEL

In view of the above, it is desirable to provide a battery case and a battery pack, which can fix a case without taking a long time.

The application provides a battery shell, which is used for accommodating a battery cell module and a circuit board and comprises a first shell and a second shell, wherein the first shell comprises a first edge part; the second shell comprises a second edge part corresponding to the first edge part, and a gap is arranged between the first edge part and the second edge part; the battery case further comprises a connecting portion, the connecting portion is arranged on the second shell and located in the gap, and the connecting portion is connected with the first edge portion and the second edge portion.

In at least one embodiment, the connecting portion is integrally formed with the second housing.

In at least one embodiment, the first edge portion includes a weld surface, and the connecting portion is provided at a position of the second edge portion corresponding to the weld surface, and flows into the gap after being melted.

In at least one embodiment, the first edge portion is provided with an L-shaped step, the L-shaped step includes a first step surface, a first abutting surface and a first connecting surface, the first connecting surface connects the first step surface and the first abutting surface, and the first step surface is a welding surface; the second edge portion is equipped with the L shape step of falling, the L shape step of falling includes second step face, second butt joint face and second connection face, the second is connected the face and is connected second step face and second butt joint face, connecting portion locate on the second step face, first step face with form first clearance between the second step face, first connection face with form the second clearance between the second connection face, first clearance with second clearance intercommunication.

In at least one embodiment, a third gap is formed between the first and second abutment surfaces, the third gap being in communication with the second gap. In at least one embodiment, a support plate is disposed on an inner wall of the first housing and the second housing, and the support plate fixes the circuit board.

In at least one embodiment, pressing blocks are arranged on the first shell and the second shell, an accommodating groove is formed between the supporting plate and the pressing block, and the circuit board is arranged in the accommodating groove.

In at least one embodiment, the first housing is provided with a guide pressing block, and the circuit board enters the accommodating groove through the guide pressing block.

In at least one embodiment, the second housing is provided with a guide portion, the first housing is larger than the second housing, and the guide portion is provided with a guide surface.

In at least one embodiment, the first casing and the second casing respectively include an end cover and a side cover surrounding the end cover, the end cover and the side cover form an accommodation space, the cell module is located in the accommodation space, and grooves adapted to an outer contour of the cell module are formed in the first casing and the second casing.

The application also provides a battery pack, which comprises a battery cell module and a battery shell, wherein the battery cell module is arranged in the battery shell, the battery shell is any one of the battery shells, and the connecting part is filled in the gap and used for fixing the first shell and the second shell.

In the battery case and the battery pack, the second case is provided with the connecting portion, and the first edge portion and the second edge portion of the first case are connected by the connecting portion. Adopt this battery case can directly make two casings connect, need not to adopt the screw to fix, when having promoted automatic effect, also saved the cost, promoted efficiency.

Drawings

Fig. 1 is a perspective view of a battery case according to an embodiment.

Fig. 2 is an exploded view of the battery case and the battery cell module shown in fig. 1.

Fig. 3 is an exploded view of the battery case and the battery cell module shown in fig. 1 from another view angle.

Fig. 4 is a perspective view of the first housing.

Fig. 5 is a perspective view of the first housing shown in fig. 4 from another perspective.

Fig. 6 is a schematic cross-sectional view of the first housing shown in fig. 4 taken along the direction a-a.

Fig. 7 is a perspective view of the second housing.

Fig. 8 is a perspective view of the second housing shown in fig. 7 from another perspective.

Fig. 9 is a schematic cross-sectional view of the second housing of fig. 8 taken along the direction B-B.

Fig. 10 is a schematic cross-sectional view of the battery case shown in fig. 1 in the C-C direction.

Description of the main elements

Battery case 100

First housing 10

First end cap 11

First side cover 12

First edge part 121

L-shaped step 122

First step surface 1221

First connecting surface 1222

First butt-joint face 1223

First accommodation space 13

Second housing 20

Second end cap 21

Second side cover 22

Second edge portion 221

Inverted L-shaped step 222

Second step surface 2221

Second connection surface 2222

Second mating surface 2223

First gap 2224

Second gap 2225

Third gap 2226

Second accommodation space 23

Connecting part 24

Positioning post 30

Supporting plate 40

Storage tank 41

Pressing block 50

Guide press block 60

Guide part 70

Position limiting member 80

Groove 81

Battery cell module 200

Circuit board 90

Battery pack 300

Detailed Description

The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments.

It will be understood that when an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. When an element is referred to as being "on" another element, it can be directly on the other element or intervening elements may also be present. The terms "top," "bottom," "upper," "lower," "left," "right," "front," "rear," and the like as used herein are for illustrative purposes only.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein in the description of the present application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application.

Some embodiments of the present application provide a battery case and a battery pack for accommodating a cell module and a circuit board, including a first case and a second case, the first case including a first edge portion; the second shell comprises a second edge part corresponding to the first edge part, and a gap is arranged between the first edge part and the second edge part; the battery case further comprises a connecting portion, the connecting portion is arranged on the second shell and located in the gap, and the connecting portion is connected with the first edge portion and the second edge portion.

In above-mentioned battery case and above-mentioned group battery first casing includes first edge portion, the second casing includes the second edge portion, first edge portion with form the clearance between the second edge portion, connecting portion locate on the second casing and lie in the clearance, through connecting portion connect the first edge portion of first casing with the second edge portion need not to use the screw, also need not to adopt glue to bond, and is fixed convenient, saves cost and has promoted efficiency.

Some embodiments of the present application will be described in detail below with reference to the accompanying drawings. The embodiments described below and the features of the embodiments can be combined with each other without conflict.

Referring to fig. 1, fig. 2, fig. 3 and fig. 10, an embodiment of the present application provides a battery pack 300. The battery pack 300 includes a battery case 100 and a battery cell module 200, and the battery cell module 200 is disposed inside the battery case 100, so that the battery case 100 protects the battery cell module 200. The battery case 100 includes a first case 10 and a second case 20, the first case 10 includes a first edge portion 121, the second case 20 includes a second edge portion 221 corresponding to the first edge portion 121, and a gap (not shown) is provided between the first edge portion 121 and the second edge portion 221. The battery case 100 further includes a connecting portion 24, the connecting portion 24 is disposed on the second case 20 and located in the gap, and the connecting portion 24 connects the first edge 121 and the second edge 221.

Referring to fig. 4 and 5, in detail, the first housing 10 includes a first end cap 11 and a first side cap 12, the first side cap 12 is substantially an annular shell structure, and the first side cap 12 is fixed on the first end cap 11. The first end cover 11 and the first side cover 12 form a first accommodating space 13, and a part of the battery cell module 200 is located in the first accommodating space 13. In one embodiment, the first end cover 11 and the first side cover 12 enclose a hollow square structure to accommodate the battery cell module 200. The first end cap 11 and the first side cap 12 are of an integrally formed structure. It will be appreciated that the first end cap 11 and the first side cap 12 may be provided in a detachable configuration.

It is understood that, in other embodiments, the first end cap 11 and the first side cap 12 may be designed according to the outer contour of the cell module 200, such as being provided in a cylindrical shape, a conical shape, or the like.

The first side cover 12 includes the first edge 121 at a position close to the second case 20, and the first edge 121 includes a welding surface. Further, an L-shaped step 122 is disposed at the first edge 121, the L-shaped step 122 faces the second housing 20, and the L-shaped step is circumferentially disposed at the first edge 121.

Referring to fig. 6, the L-shaped step 122 includes the first step surface 1221, a first connection surface 1222, and a first abutting surface 1223. The first step surface 1221 is the welding surface. The first connecting surface 1222 connects the first step surface 1221 and the first abutting surface 1223, the first step surface 1221 and the first abutting surface 1223 are disposed substantially in parallel, and the first connecting surface 1222 is disposed substantially perpendicular to the first step surface 1221 and the first abutting surface 1223, respectively.

The first step surface 1221 is a welding surface, and after the first side cover 12 is formed by injection molding, a spark pattern (not shown) is provided on the welding surface. By providing the welding surface with a spark pattern, the welding strength between the welding surface and the connecting portion 24 can be increased.

Referring to fig. 7 and 8, the second housing 20 includes a second end cap 21 and the second side cap 22. Like the first housing 10, the second side cover 22 is substantially an annular shell structure, and the second side cover 22 is fixed to the second end cover 21. The second end cover 21 and the second side cover 22 form a second receiving space 23, and another part of the battery cell module 200 is located in the second receiving space 23. Likewise, in one embodiment, the second end cap 21 and the second side cap 22 enclose another hollow square structure to receive the battery cell module 200 together with the first casing 10.

The second side cover 22 includes the second edge portion 221 corresponding to the first edge portion 121 at a position close to the first casing 10, and a gap is formed between the second edge portion 221 and the first edge portion 121. The connecting portion 24 is disposed at the position of the second edge portion 221, and corresponds to the welding surface, and the connecting portion 24 flows into the gap after being melted. Further, an inverted L-shaped step 222 is disposed at the second edge portion 221, the inverted L-shaped step 222 faces the first housing 10, and the inverted L-shaped step is circumferentially disposed at the second edge portion 221.

Referring to fig. 9, the inverted L-shaped step includes a second step surface 2221, a second connection surface 2222, and a second abutting surface 2223. The connecting portion 24 is disposed on the second step surface 2221, and the second step surface 2221 corresponds to the first step surface 1221. The second connection surface 2222 connects the second step surface 2221 and the second abutting surface 2223, wherein the second step surface 2221 and the second abutting surface 2223 are substantially parallel to each other, and the second connection surface 2222 is substantially perpendicular to the second step surface 2221 and the second abutting surface 2223, respectively.

Referring to fig. 10, further, a first gap 2224 is formed between the first step surface 1221 and the second step surface 2221, a second gap 2225 is formed between the first connection surface 1222 and the second connection surface 2222, and a third gap 2226 is formed between the first abutment surface 1223 and the second abutment surface 2223. The gap formed between the first edge 121 and the second edge 221 is formed by the first gap 2224, the second gap 2225, and the third gap 2226. After the connection portion 24 is melted, the melted connection portion 24 flows into the gap.

The connecting portion 24 is disposed at the center of the second step surface 2221, and the cross section of the connecting portion 24 is triangular. The triangular cross-section of the connecting portion 24 ensures that the welding energy is transmitted to the connecting portion 24 to the maximum extent. It is understood that in other embodiments, the cross-sectional shape of the connecting portion 24 is not limited thereto, and may be an arc instead.

By providing a gap between the first case 10 and the second case 20, after the connection portion 24 is melted, the liquid flows into the gap to fix the first case 10 and the second case 20, so that the battery case 100 has a waterproof function, and the liquid is prevented from flowing into the battery case 100 from the gap. Meanwhile, the fused connection part 24 is prevented from overflowing to the outside of the first case 10 and the second case 20, and then affecting the appearance and beauty of the battery case 100.

It is understood that in other embodiments, the L-shaped step 122 provided on the first edge portion 121 and the inverted L-shaped step 222 provided on the second edge portion 221 may be replaced by other shapes. If a mutually cooperating arc-shaped structure is provided between said first edge portion 121 and said second edge portion 221, said connecting portion 24 is provided at a position where the arc-shape protrudes. The melted connecting portion 24 can flow into the arc-shaped gap, and the fixing and sealing effects can be achieved. Therefore, the shape of the gap provided between the first edge portion 121 and the second edge portion 221 is not limited to this, and other structures that achieve the same effect or function may be applied.

In this embodiment, the first housing 10 and the second housing 20 are plastic members, and further, the connecting portion 24 and the second housing 20 are integrally formed. Specifically, the second housing 20 may be formed in a mold, and the connecting portion 24 is formed in the mold. It is understood that, in other embodiments, the material of the first casing 10 and the second casing 20 is not limited thereto, and the first casing 10 and the second casing 20 may be replaced by a steel shell.

Referring to fig. 4, 5, 7 and 8, the battery case 100 will be described with respect to the coordinate axes defining the up, down, left, right, front and rear directions for the convenience of description. Positioning columns 30 are respectively arranged on the inner walls of the first shell 10 and the second shell 20. In one embodiment, the positioning posts 30 are respectively disposed on the left inner wall, the right inner wall and the inner wall of the lower end of the first casing 10. Similarly, the inner wall of the second casing 20 is provided with the positioning column 30 at the same position as the inner wall of the first casing 10. The positioning posts 30 are provided to avoid that the battery cell module 200 cannot be installed in the first casing 10 and the second casing 20 after the first casing 10 and the second casing 20 are injection-molded and deformed due to shrinkage. This problem is best solved by the positioning post 30.

Specifically, the left and right inner walls of the first casing 10 and the second casing 20 are respectively provided with two positioning columns 30, and the inner wall of the lower end is provided with three positioning columns 30. It is understood that, in other embodiments, the number of the positioning columns 30 is not limited thereto, and may be set according to the size and shape of the first housing 10 and the second housing 20.

Referring to fig. 4 and 7, in one embodiment, the inner walls of the first casing 10 and the second casing 20 are respectively provided with a supporting plate 40, and the length of the supporting plate 40 is substantially the same as that of the first casing 10 and the second casing 20.

Further, in order to better fix the circuit board 90, an adhesive is coated on the surface of the supporting plate 40 contacting with the circuit board 90, so as to better fix the circuit board 90 on the supporting plate 40, and prevent the circuit board 90 from shifting.

Referring to fig. 4, in an embodiment, a pressing block 50 is further disposed on the first casing 10 and the second casing 20, and the pressing block 50 is disposed at an upper end position of an inner wall of the first casing 10 and located above the supporting plate 40. An accommodating groove 41 is formed between the supporting plate 40 and the pressing block 50, the edge of the circuit board 90 is located at the position of the accommodating groove 41, and the pressing block 50 supports the circuit board 90 on the supporting plate 40 to fix the circuit board 90.

Referring to fig. 4 and 7, in one embodiment, the first housing 10 is further provided with a guide pressing block 60. The guide pressing block 60 is disposed at an inner wall position of an upper end of the first housing 10. The guide press block 60 is provided with an inclined plane for guiding the circuit board 90 of the battery cell module 200 to move to the accommodating groove 41. A plurality of guide press blocks 60 are disposed at an upper end of an inner wall of the first housing 10 to guide the circuit board 90 at the same time.

Referring to fig. 7 and 8, in an embodiment, a guide portion 70 is further disposed on the second casing 20, and the guide portion 70 is disposed at an upper end position of an inner wall of the second casing 20. The guide portion 70 is provided with a guide surface at a position close to an end of the first housing 10, the volume of the first housing 10 is larger than the volume of the second housing 20, and during the fixing of the first housing 10 and the second housing 20, the guide portion 70 is aligned with the first housing 10 through the guide surface on the guide portion 70, so that the first housing 10 and the second housing 20 are fixed.

Since the first housing 10 has a large volume, the first housing 10 may shrink during molding, and when the first housing is fixed to the second housing 20, the guide portion 70 enters the first housing 10 through a guide surface, so that the first housing 10 and the second housing 20 are smoothly fixed.

Referring to fig. 4 and 7, in an embodiment, a limiting member 80 is further disposed in the first casing 10 and the second casing 20, and the limiting member 80 is used to fix the battery cell module 200. Further, the limiting members 80 are respectively tightly attached to the inner walls of the first end cover 11 and the second end cover 21, and are located at the lower end of the supporting plate 40. The limiting part 80 is provided with a groove 81 matched with the outer contour of the battery cell module 200. After the battery cell module 200 enters the first casing 10 and the second casing 20, the battery cell module 200 is located at the position of the groove 81 for fixing.

It is understood that, in other embodiments, the shape of the limiting member 80 may be replaced correspondingly in order to fix the battery cell module 200 with different outer profiles. If the battery cell module 200 has substantially the same shape as the first casing 10 and the second casing 20, the position-limiting member 80 may be omitted.

Referring back to fig. 1 to 3, after the connecting portion 24 contacts the bonding surface, the bonding process starts, and the connecting portion 24 begins to melt. Whereas the melting of said connection 24 requires an external welding device for control. In the present application, the connecting portion 24 is formed by ultrasonic welding, and under the action of ultrasonic waves, the connecting portion 24 melts and fills the gap, thereby fixing the first housing 10 and the second housing 20.

It will be appreciated that in other embodiments, ultrasonic welding may be replaced by laser welding or other means of achieving the same function or effect.

To sum up, battery case and group battery that this application provided, through first casing 10 with second casing 20 sets up matched with face of weld and connecting portion 24, after welding, connecting portion 24 melts, and the molten liquid flows extremely first casing 10 with between the second casing 20, two casings of fixed. By adopting the battery shell 100, two shells can be directly fixed without screws, so that the automation effect is improved, the cost is saved, and the efficiency is improved.

In addition, those skilled in the art should recognize that the foregoing embodiments are illustrative only, and not limiting, and that appropriate changes and modifications can be made without departing from the spirit and scope of the invention as defined by the appended claims.

Claims (11)

1. A battery shell for accommodating a cell module and a circuit board, comprising:

a first housing including a first edge portion;

a second case including a second edge corresponding to the first edge, a gap being provided between the first edge and the second edge;

the battery case is characterized by comprising a connecting part, wherein the connecting part is arranged on the second shell and is positioned in the gap, and the connecting part is connected with the first edge part and the second edge part.

2. The battery case of claim 1, wherein the connecting portion is integrally formed with the second case.

3. The battery case according to claim 2, wherein the first edge portion includes a welding surface, the connecting portion is provided at a position of the second edge portion corresponding to the welding surface, and the connecting portion flows into the gap after being melted.

4. The battery case according to claim 3, wherein the first edge portion is provided with an L-shaped step, the L-shaped step includes a first step surface, a first abutting surface and a first connecting surface, the first connecting surface connects the first step surface and the first abutting surface, and the first step surface is a welding surface; the second edge portion is provided with an inverted L-shaped step, the inverted L-shaped step comprises a second step surface, a second butt joint surface and a second joint surface, the second joint surface is connected with the second step surface and the second butt joint surface, the connecting portion is arranged on the second step surface, a first gap is formed between the first step surface and the second step surface, a second gap is formed between the first joint surface and the second joint surface, and the first gap is communicated with the second gap.

5. The battery housing of claim 4, wherein a third gap is formed between the first mating surface and the second mating surface, the third gap being in communication with the second gap.

6. The battery casing according to any one of claims 1 to 5, wherein a support plate is provided on an inner wall of the first case and the second case, the support plate fixing the circuit board.

7. The battery casing of claim 6, wherein the first casing and the second casing are provided with pressing blocks, a receiving groove is formed between the supporting plate and the pressing blocks, and the circuit board is arranged in the receiving groove.

8. The battery casing of claim 7, wherein the first housing is provided with a guide pressing block, and the circuit board enters the accommodating groove through the guide pressing block.

9. The battery casing of claim 1, wherein the second shell further comprises a guide portion, the first shell is larger than the second shell, and the guide portion comprises a guide surface.

10. The battery casing of claim 1, wherein the first casing and the second casing respectively include an end cover and a side cover surrounding the end cover, the end cover and the side cover form a receiving space, the cell module is located in the receiving space, and a groove adapted to an outer contour of the cell module is formed in the first casing and the second casing.

11. A battery pack, comprising a cell module and a battery casing, wherein the cell module is disposed in the battery casing, and the battery casing is the battery casing of any one of claims 1 to 10, and the connecting portion fills the gap and is used for fixing the first casing and the second casing.

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