CN216213789U - Battery box and battery package - Google Patents

Abstract

The utility model relates to the technical field of batteries, and provides a battery box body and a battery pack. The battery box includes: a first sidewall piece; a second sidewall member disposed opposite the first sidewall member to form a cavity; the connecting piece is connected with the first side wall piece and the second side wall piece; wherein at least one of the first and second sidewall members is a variable thickness structure. The first side wall part and the second side wall part are connected through the connecting piece, so that the structural strength is ensured, at least one of the first side wall part and the second side wall part is of a variable-thickness structure, the weight of the battery box body can be properly reduced on the basis of ensuring the strength, and the performance of the battery box body is improved.

Description

Battery box and battery package

Technical Field

The utility model relates to the technical field of batteries, in particular to a battery box body and a battery pack.

Background

The battery case in the related art includes a plurality of beams or plates, and the thickness of each beam or plate is large in order to ensure the structural strength of the battery case, but this structure may result in a large weight of the battery case.

SUMMERY OF THE UTILITY MODEL

The utility model provides a battery box body and a battery pack, which are used for improving the performance of the battery box body.

According to a first aspect of the present invention, there is provided a battery case comprising:

a first sidewall piece;

a second sidewall member disposed opposite the first sidewall member to form a cavity;

the connecting piece is connected with the first side wall piece and the second side wall piece;

wherein at least one of the first and second sidewall members is a variable thickness structure.

The battery box body comprises a first side wall part, a second side wall part and a connecting piece, a cavity is formed between the first side wall part and the second side wall part, the first side wall part and the second side wall part are connected through the connecting piece, the structural strength is guaranteed, at least one of the first side wall part and the second side wall part is of a variable-thickness structure, the weight of the battery box body can be properly reduced on the basis of guaranteeing the strength, and the performance of the battery box body is improved.

According to a second aspect of the present invention, there is provided a battery pack including the battery case described above.

The battery pack comprises a battery box body, wherein the battery box body comprises a first side wall part, a second side wall part and a connecting part, a cavity is formed between the first side wall part and the second side wall part, and the first side wall part and the second side wall part are connected through the connecting part, so that the structural strength is ensured, at least one of the first side wall part and the second side wall part is of a variable-thickness structure, the weight of the battery box body can be properly reduced on the basis of ensuring the strength, and the performance of the battery box body is improved.

Drawings

For a better understanding of the present disclosure, reference may be made to the embodiments illustrated in the following drawings. The components in the drawings are not necessarily to scale, and related elements may be omitted in order to emphasize and clearly illustrate the technical features of the present disclosure. In addition, the relevant elements or components may be arranged differently as is known in the art. Further, in the drawings, like reference characters designate the same or similar parts throughout the several views. Wherein:

fig. 1 is a schematic structural view of a battery case shown according to a first exemplary embodiment;

fig. 2 is a schematic sectional structure view of a battery case according to a first exemplary embodiment;

FIG. 3 is a schematic view showing a partial structure of a battery case according to a first exemplary embodiment;

fig. 4 is a schematic sectional structure view of a battery case according to a second exemplary embodiment;

fig. 5 is a partial structural schematic view of a battery case according to a second exemplary embodiment;

fig. 6 is a schematic view showing a partial sectional structure of a battery case according to a second exemplary embodiment;

fig. 7 is a schematic view showing a partial sectional structure of a battery case according to a third exemplary embodiment.

The reference numerals are explained below:

1. a cavity; 2. a sub-cavity;

10. a first sidewall piece; 11. a first thinning portion; 12. a first thickened portion; 13. a first support section; 14. a second support portion; 20. a second sidewall member; 21. a second thinning portion; 22. a second thickened portion; 23. a third support portion; 30. a connecting member; 40. a heat exchange plate; 41. a heat exchange channel; 50. a first beam member; 60. a second beam member; 70. a third beam member.

Detailed Description

The technical solutions in the exemplary embodiments of the present disclosure will be clearly and completely described below with reference to the drawings in the exemplary embodiments of the present disclosure. The example embodiments described herein are for illustrative purposes only and are not intended to limit the scope of the present disclosure, and it is, therefore, to be understood that various modifications and changes may be made to the example embodiments without departing from the scope of the present disclosure.

In the description of the present disclosure, unless otherwise explicitly specified or limited, the terms "first", "second", and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance; the term "plurality" means two or more; the term "and/or" includes any and all combinations of one or more of the associated listed items. In particular, reference to "the" object or "an" object is also intended to mean one of many such objects possible.

The terms "connected," "secured," and the like are to be construed broadly and unless otherwise stated or indicated, and for example, "connected" may be a fixed connection, a removable connection, an integral connection, an electrical connection, or a signal connection; "connected" may be directly connected or indirectly connected through an intermediate. The specific meaning of the above terms in the present disclosure can be understood by those skilled in the art as the case may be.

Further, in the description of the present disclosure, it is to be understood that the directional words "upper", "lower", "inner", "outer", etc., which are described in the exemplary embodiments of the present disclosure, are described at the angles shown in the drawings, and should not be construed as limiting the exemplary embodiments of the present disclosure. It will also be understood that, in this context, when an element or feature is referred to as being "on", "under", or "inner", "outer" with respect to another element(s), it can be directly on "," under ", or" inner "," outer "with respect to the other element(s), or indirectly on", "under", or "inner", "outer" with respect to the other element(s) via intervening elements.

An embodiment of the present invention provides a battery case, referring to fig. 1 to 7, the battery case includes: a first sidewall piece 10; a second sidewall member 20, the second sidewall member 20 being disposed opposite the first sidewall member 10 to form the cavity 1; a connecting member 30, the connecting member 30 connecting the first sidewall member 10 and the second sidewall member 20; wherein at least one of the first and second sidewall members 10 and 20 is a variable thickness structure.

The battery case of one embodiment of the present invention includes a first sidewall member 10, a second sidewall member 20, and a connecting member 30, a cavity 1 is formed between the first sidewall member 10 and the second sidewall member 20, and the first sidewall member 10 and the second sidewall member 20 are connected by the connecting member 30, thereby ensuring structural strength, and by making at least one of the first sidewall member 10 and the second sidewall member 20 a variable thickness structure, on the basis of ensuring strength, the weight of the battery case can be reduced appropriately, thereby improving the performance of the battery case.

The battery box body can comprise structures such as cross beams, longitudinal beams, a bottom plate, a bottom guard plate and the like, the cross beams and the longitudinal beams can form an outer frame of the battery box body, and the cross beams and the longitudinal beams can also be connected into the outer frame, so that a plurality of spaces for placing batteries are separated in the outer frame. The first sidewall element 10, the second sidewall element 20 and the connecting element 30 may form a cross member, a longitudinal member, a bottom plate, etc., without limitation.

At least one of the first side wall member 10 and the second side wall member 20 is a variable thickness structure, for example, the first side wall member 10 and the second side wall member 20 may be plate bodies, and the overall thicknesses of the plate bodies are not consistent, so that the thickness of the battery box body at a position where the impact force is large is larger, and the thickness of the battery box body at a position where the impact force is smaller is relatively smaller, or the thickness of the battery box body at a position where the reinforcing part is provided may be relatively smaller, and the above structure can ensure the strength and reduce the weight of the battery box body.

In one embodiment, the cavity 1 is formed between the first sidewall member 10 and the second sidewall member 20, and the connecting member 30 for connecting the first sidewall member 10 and the second sidewall member 20 may be a connecting column, which may be a plurality of connecting columns, and the plurality of connecting columns are arranged in the cavity 1 at intervals, at this time, the cavity 1 may still be an integrally connected cavity.

In one embodiment, as shown in fig. 2 to 7, the connection member 30 divides the cavity 1 into separate sub-cavities 2, i.e., both ends of the connection member 30 may extend to opposite ends of the first and second sidewall members 10 and 20, so that the cavity 1 may be divided into separate sub-cavities 2. The connecting member 30 may be a plate body.

In one embodiment, the connecting member 30 is provided in plural, and the plural connecting members 30 connect the first sidewall member 10 and the second sidewall member 20 at intervals, so that the structural strength can be ensured.

It should be noted that the plurality of connecting members 30 may divide the cavity 1 into a plurality of independent sub-cavities 2, and the extending directions of the plurality of independent sub-cavities 2 may be identical. The distances between the adjacent two connection members 30 may be uniform, or the distances between the adjacent two connection members 30 may be non-uniform.

In one embodiment, as shown in fig. 3 and 5, the first sidewall part 10 is a variable thickness structure, i.e. the first sidewall part 10 comprises a first thinned portion 11 and a first thickened portion 12, the thickness of the first thinned portion 11 being smaller than the thickness of the first thickened portion 12; at least one of the connecting pieces 30 is connected with the first thinning part 11, and the connecting pieces 30 are connected to the first thinning part 11, so that the strength of the first thinning part 11 can be increased, and the problems of deformation and the like of the first thinning part 11 are avoided.

The first sidewall member 10 may be disposed away from the battery, and the second sidewall member 20 may be disposed toward the battery, that is, the first sidewall member 10 is directly impacted by the external structure, so that it is required to ensure that the first sidewall member 10 has higher strength, and in this embodiment, the strength at the first thinning portion 11 may also be relatively higher by connecting the connecting member 30 to the first thinning portion 11.

In one embodiment, the first sidewall member 10, the second sidewall member 20, and the connecting member 30 are a one-piece structure, thereby ensuring structural strength.

In some embodiments, the first sidewall member 10, the second sidewall member 20 and the connecting member 30 are integrally formed, which not only can ensure the structural strength, but also can improve the structural forming efficiency.

In some embodiments, the first sidewall piece 10, the second sidewall piece 20, and the connecting piece 30 may be separate members, the first sidewall piece 10 and the connecting piece 30 may be welded, and the second sidewall piece 20 and the connecting piece 30 may be welded. Alternatively, the connecting member 30 may be integrally formed with the first or second sidewall member 10 or 20, and then the connection is achieved by welding.

In one embodiment, the first sidewall member 10, the second sidewall member 20, and the connecting member 30 form a floor shield, as shown in fig. 1, 2, and 4, the battery case further includes: the heat exchange plate 40, the heat exchange plate 40 sets up in the one side that second lateral wall spare 20 deviates from first lateral wall spare 10, and the heat exchange plate 40 is close to the battery setting to the realization is to the rapid heating and the heat dissipation of battery, avoids appearing the safety problem. The heat exchange plate 40 may be a base plate, i.e. the base plate is integrated with the heat exchange plate 40, as shown in fig. 2 and 4, the heat exchange plate 40 comprises heat exchange channels 41, the heat exchange channels 41 may be fluid heat exchange channels, and the heat exchange channels 41 may also be gas heat exchange channels. The heat exchange channels 41 may be at least two. The heat exchange plate 40 may be a heating plate or a cooling plate, and is not limited herein and may be selected according to actual needs.

In one embodiment, as shown in fig. 3 and 5, the second sidewall member 20 is a variable thickness structure, the second sidewall member 20 includes a second thinned portion 21 and a second thickened portion 22, the second thinned portion 21 has a thickness smaller than the second thickened portion 22; wherein the second side wall element 20 is intended to be arranged towards the battery. Since the second side wall member 20 is disposed close to the battery, the second side wall member 20 is not directly impacted by an external component, and thus the second side wall member 20 does not need to be thickened as a whole, but can be thinned locally, thereby reducing the weight of the battery case appropriately.

In one embodiment, as shown in fig. 7, the first sidewall member 10 may be disposed away from the battery, the second sidewall member 20 may be disposed toward the battery, the first sidewall member 10 may be of a constant thickness structure, the second sidewall member 20 may be of a variable thickness structure, the first sidewall member 10 is directly impacted by an external structure, and thus it is necessary to ensure that the first sidewall member 10 has a high strength, and the second sidewall member 20 is not directly impacted by an external component, and thus the second sidewall member 20 may be of a variable thickness structure.

In one embodiment, the first sidewall member 10 may be disposed away from the battery, the second sidewall member 20 may be disposed toward the battery, the first sidewall member 10 may be a variable thickness structure, the second sidewall member 20 may be a variable thickness structure, the first sidewall member 10 may be easily impacted by an external component may be the first thickened portion 12, and the first sidewall member 10 may not be easily impacted by the external component may be the first thinned portion 11, or the first sidewall member 10 may be easily impacted by the external component may be the first thinned portion 11, but other components, such as the connecting member 30, may be connected to the first thinned portion 11. Alternatively, the first sidewall member 10 may be easily impacted by an external member at the first thinning portion 11, but when another member is connected to the first sidewall member 10 at a position close to the first thinning portion 11, the strength of the first thinning portion 11 may be increased.

In one embodiment the first side wall element 10 may be arranged facing away from the battery, the second side wall element 20 may be arranged facing towards the battery, and the external forces to which the second side wall element 20 is subjected are also mainly transmitted by the connecting element 30, whereby the connecting element 30 is connected to the second thickened portion 22, thus ensuring that the forces transmitted by the connecting element 30 do not damage the second side wall element 20, after all the strength of the second thickened portion 22 is relatively high.

In one embodiment, the first thickened portion 12 forms a first protruding structure on the first sidewall part 10, the first protruding structure being disposed towards the cavity 1, and the second thickened portion 22 forms a second protruding structure on the second sidewall part 20, the second protruding structure being disposed towards the cavity 1, so that the protruding structure does not occupy the height space of the battery case, thereby improving the energy density of the battery pack.

In some embodiments, the first thickened portion 12 forms a first protruding structure on the first sidewall 10, the first protruding structure being disposed toward the cavity 1, and the second thickened portion 22 forms a second protruding structure on the second sidewall 20, the second protruding structure being disposed toward the cavity 1, so that the protruding structure does not occupy the height space of the battery case, thereby increasing the energy density of the battery pack

In one embodiment, as shown in fig. 2 and 4, the first side wall member 10 is provided with a first supporting portion 13 and a second supporting portion 14 which are adjacent to each other, the battery box further comprises a first beam member 50 and a second beam member 60, and the first beam member 50 is connected with the first supporting portion 13; the second beam member 60 is connected to the second support portion 14. The thickness of the first side wall part 10 provided with the first supporting part 13 and/or the second supporting part 14 is smaller than at least part of the thickness of the first side wall part 10 between the first supporting part 13 and the second supporting part 14, so that the weight of the battery box body can be reduced, and the strength of the position far away from the first supporting part 13 and the second supporting part 14 can be ensured to be stronger, thereby avoiding damage to the first side wall part 10 when an external part impacts the first side wall part 10, and improving the performance of the battery box body. The first support portion 13 and the second support portion 14 are respectively provided on the two first reduced thickness portions 11 so as to secure the strength of the first reduced thickness portions 11, and the first thickened portion 12, which is away from the first support portion 13 and the second support portion 14, can also secure the strength by its own thickness. The first and second support portions 13 and 14 may be U-like plate bodies.

It should be noted that, the first sidewall member 10 has a variable thickness structure, the first supporting portion 13 and the second supporting portion 14 may be disposed at a position where the thickness of the first sidewall member 10 is relatively small, and the first supporting portion 13 and the second supporting portion 14 respectively connect the first beam member 50 and the second beam member 60, so that the strength of the first sidewall member 10 at the position where the first supporting portion 13 and the second supporting portion 14 are disposed is relatively high. In addition, since there is no supporting structure at the position of the first sidewall 10 away from the first supporting portion 13 and the second supporting portion 14, it is necessary to ensure that the structure of the first sidewall is relatively strong, and in this embodiment, the position of the first sidewall 10 away from the first supporting portion 13 and the second supporting portion 14 is not thinned, that is, the thickness is relatively thick, and the weight of the first sidewall 10 can be reduced on the basis of ensuring the structural strength by the thickened structure.

In one embodiment, the first beam 50 and the second beam 60 may be disposed adjacent to each other. In some embodiments, additional beams may be disposed between the first beam 50 and the second beam 60.

In one embodiment, as shown in fig. 2 and 3, the first thickened portion 12 located between the first support portion 13 and the second support portion 14 is one; the number of the second thickened portions 22 between the first support portion 13 and the second support portion 14 is one, the number of the first reduced thickness portions 11 is two, and the two first reduced thickness portions 11 are located on both sides of the first thickened portion 12, respectively; in this case, the first thickened portion 12 is arranged opposite to the second thickened portion 22, i.e. the strength of the first sidewall part 10 and the second sidewall part 20 is high in the middle, so that a reliable structural strength is ensured and damage to the first sidewall part 10 and the second sidewall part 20 by external components is avoided.

In one embodiment, as shown in fig. 4 and 5, the first thickened portion 12 between the first support portion 13 and the second support portion 14 is one; the second thickened portions 22 between the first support portion 13 and the second support portion 14 are plural, the second thinned portion 21 is plural, and the second thinned portions 21 and the second thickened portions 22 are alternately arranged; the middle portion of the first thickened portion 12 is opposite to the second thinned portion 21, the first thickened portion 12 of the first sidewall member 10 needs to bear a large impact force of an external component, so that the thickness is relatively large, and the second thinned portion 21 does not need to directly bear a large pressure, so that the thickness can be relatively small, and the weight can be reduced on the basis of ensuring the strength. Further, due to the presence of the second reduced thickness portion 21, a certain buffer space is provided between the first thickened portion 12 and the second reduced thickness portion 21, avoiding that the first thickened portion 12 directly transmits force to the second reduced thickness portion 21. In certain embodiments, it is not excluded that the first thickening 12 is arranged opposite the second thickening 22.

In one embodiment, the first thickened portion 12 may be a constant thickness structure.

In one embodiment, as shown in fig. 6, the thickness of at least part of the first thickened portion 12 is gradually reduced from the middle position towards two sides, i.e. the middle position of the first thickened portion 12 is far away from the first support portion 13 and the second support portion 14, so the strength is relatively weak, and the position close to the first support portion 13 and the second support portion 14 is relatively high, so the first thickened portion 12 may be a thickened structure in this embodiment.

In one embodiment, second thickened portion 22 may be a constant thickness structure.

In one embodiment, the thickness of at least a portion of the second thickened portion 22 is gradually reduced from its central position toward both sides.

In one embodiment, as shown in fig. 1, the battery case further includes: a third beam 70, the third beam 70 intersecting the first beam 50, the third beam 70 intersecting the second beam 60; wherein, the second sidewall 20 is provided with a third supporting portion 23, and the third supporting portion 23 corresponds to the third beam 70, so as to support the third beam 70.

It should be noted that the third beam 70 intersects the first beam 50, and the third beam 70 intersects the second beam 60, so that a receiving space for placing the battery can be formed inside the battery box. The third support portion 23 may be a support block, i.e. the third support portion 23 occupies a part of one extension direction of the second side wall member 20, while the first support portion 13 and the second support portion 14 occupy all of one extension direction of the second side wall member 20, as shown in fig. 3 and 5. The first beam member 50 and the first support portion 13 may be connected by bolts, and the second beam member 60 and the second support portion 14 may be connected by bolts.

An embodiment of the utility model also provides a battery pack which comprises the battery box body.

The battery pack of one embodiment of the present invention includes a battery case including a first sidewall member 10, a second sidewall member 20, and a connecting member 30, a cavity 1 is formed between the first sidewall member 10 and the second sidewall member 20, and the first sidewall member 10 and the second sidewall member 20 are connected by the connecting member 30, thereby ensuring structural strength, and by making at least one of the first sidewall member 10 and the second sidewall member 20 a variable thickness structure, on the basis of ensuring strength, the weight of the battery case can be appropriately reduced, thereby improving the performance of the battery case.

In one embodiment, the battery pack includes a battery including a cell and an electrolyte, a minimum unit capable of performing an electrochemical reaction such as charging/discharging. The battery cell refers to a unit formed by winding or laminating a stack including a first electrode, a separator, and a second electrode. When the first electrode is a positive electrode, the second electrode is a negative electrode. Wherein the polarities of the first electrode and the second electrode can be interchanged. The battery core is arranged in the battery shell.

A plurality of batteries can set up in the battery box after forming battery module, and a plurality of batteries can be fixed through end plate and curb plate. A plurality of batteries can directly set up in the battery box, need not to pack a plurality of batteries promptly, and at this moment, can get rid of end plate and curb plate.

Other embodiments of the disclosure will be apparent to those skilled in the art from consideration of the specification and practice of the utility model disclosed herein. This disclosure is intended to cover any variations, uses, or adaptations of the utility model following, in general, the principles of the disclosure and including such departures from the present disclosure as come within known or customary practice within the art to which the disclosure pertains. It is intended that the specification and example embodiments be considered as exemplary only, with a true scope and spirit of the disclosure being indicated by the following claims.

It will be understood that the present disclosure is not limited to the precise arrangements described above and shown in the drawings and that various modifications and changes may be made without departing from the scope thereof. The scope of the present disclosure is limited only by the appended claims.

Claims (10)

1. A battery case, comprising:

a first sidewall piece (10);

a second side wall member (20), said second side wall member (20) being arranged opposite said first side wall member (10) to form a mould cavity (1);

a connector (30), said connector (30) connecting said first sidewall member (10) with said second sidewall member (20);

wherein at least one of the first sidewall piece (10) and the second sidewall piece (20) is a variable thickness structure.

2. The battery box according to claim 1, characterized in that the connecting piece (30) divides the cavity (1) into separate sub-cavities (2).

3. The battery case according to claim 1, wherein the connecting member (30) is plural, and the plural connecting members (30) connect the first side wall member (10) and the second side wall member (20) at intervals.

4. The battery case according to claim 1, wherein the first sidewall member (10) includes a first thinned portion (11) and a first thickened portion (12), the first thinned portion (11) having a thickness smaller than that of the first thickened portion (12);

wherein at least one of the plurality of connecting members (30) is connected to the first thinned portion (11).

5. The battery case according to claim 1, wherein the first sidewall member (10), the second sidewall member (20), and the connecting member (30) are a unitary structure.

6. The battery box according to claim 5, characterized in that the first sidewall member (10), the second sidewall member (20) and the connecting member (30) are of an integrally molded structure.

7. The battery case of claim 1, further comprising:

a heat exchanger plate (40), the heat exchanger plate (40) being arranged on a side of the second side wall member (20) facing away from the first side wall member (10);

wherein, a heat exchange channel (41) is arranged on the heat exchange plate (40), and the heat exchange channel (41) is at least partially misaligned with the orthographic projection of the connecting piece (30) on the first side wall piece (10).

8. The battery case according to any one of claims 1 to 7, wherein the second sidewall member (20) includes a second thinned portion (21) and a second thickened portion (22), the second thinned portion (21) having a thickness smaller than the thickness of the second thickened portion (22);

wherein the second side wall member (20) is adapted to be disposed towards a battery.

9. Battery housing according to claim 8, characterised in that the connecting piece (30) is connected with the second thickening (22).

10. A battery pack characterized by comprising the battery case according to any one of claims 1 to 9.

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