Battery pack

Abstract

The utility model discloses a battery pack, which comprises a protective frame, a battery pack, a battery pack, a battery pack, a battery pack and a battery pack body, and a plurality of arrangement areas arranged at intervals are defined in the protective frame; the plurality of battery modules are arranged in the plurality of arrangement areas, each battery module comprises a plurality of battery packs which are arranged in a stacked mode in the first direction, each battery pack comprises a plurality of battery monomers which are arranged in a stacked mode in the second direction, every two adjacent battery packs are connected in an adhesive mode, and the battery monomers are arranged in the second direction in a stacked mode. The first direction intersects with the second direction. According to the battery pack disclosed by the utility model, the plurality of battery packs which are connected in a bonding manner are arranged in the battery module, so that on one hand, the energy storage capacity of a single battery module is increased, the number of the battery modules can be reduced when the energy storage capacity requirement of the battery pack is met, and on the other hand, the space occupied by the bonding layers among the battery packs is smaller; and the bonding connection cost is lower, so that the space utilization rate in the battery pack can be improved, and the production cost is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of batteries, and in particular to a battery pack. Background Art

[0002] The CTP design of battery packs has been gradually adopted by major manufacturers. In a CTP battery pack, multiple battery cells are stacked to form a battery group, and multiple battery groups are stacked to form a battery module. In the related art, steel belts are used to bundle and fix the connection between battery groups in the battery module, resulting in a relatively high production cost. Content of the Utility Model

[0003] The utility model aims to solve at least one of the technical problems existing in the prior art. For this purpose, the utility model provides a battery pack, which can improve the space utilization rate and reduce the production cost.

[0004] The battery pack according to the utility model includes: a protective frame, in which a plurality of spaced-apart arrangement areas are defined; a plurality of battery modules, which are respectively arranged in the plurality of arrangement areas, each battery module includes a plurality of battery groups stacked in a first direction, and each battery group includes a plurality of battery cells stacked in a second direction, wherein adjacent two battery groups are adhesively connected, and the first direction intersects with the second direction.

[0005] In the battery pack according to the utility model, by arranging a plurality of adhesively connected battery groups in the battery module, on the one hand, the energy storage capacity of a single battery module is increased, and the number of battery modules can be reduced when meeting the energy storage capacity requirement of the battery pack; on the other hand, the space occupied by the adhesive layer between the battery groups is smaller, and the adhesive connection cost is lower, so that the space utilization rate in the battery pack can be improved and the production cost can be reduced.

[0006] According to some embodiments of the utility model, the plurality of arrangement areas are arranged in sequence in the first direction.

[0007] According to some embodiments of the utility model, the protective frame includes a plurality of side beams and at least one partition beam. The plurality of side beams are connected end to end and cooperate to define a protective cavity with upper and lower openings. The partition beam extends in the second direction, and both ends of the partition beam are connected to two side beams arranged opposite to each other in the second direction. The partition beam divides the protective cavity into a plurality of the arrangement areas.

[0008] According to some embodiments of the utility model, the battery module further includes: side plates and end plates. The side plates are adhesively bonded to both ends of the battery module in the first direction, the end plates are adhesively bonded to both ends of the battery module in the second direction, and the side plates and the end plates are fixedly connected.

[0009] According to some embodiments of the present utility model, a support flange is formed at the lower end of the side plate, and the support flange is fixedly connected to the upper end of the partition beam.

[0010] According to some embodiments of the present utility model, the battery module further includes: a buffer pad, the buffer pad is disposed between the end plate and the battery pack, and the buffer pad is adhesively connected to the end plate and the battery pack respectively.

[0011] According to some embodiments of the present utility model, the battery module further includes: an intermediate plate, the intermediate plate extends along the second direction, the intermediate plate is disposed between two adjacent battery packs, and the two adjacent battery packs are adhesively connected to both sides of the intermediate plate.

[0012] According to some embodiments of the present utility model, there is a gap between the end plate and the side beam in the second direction.

[0013] According to some embodiments of the present utility model, the battery pack further includes: a cold plate, the cold plate is disposed on the lower side of the protection frame and covers the lower open end of the protection cavity, the battery module is adhesively connected to the cold plate, and the cold plate is fixedly connected to the side beam and the partition beam.

[0014] According to some embodiments of the present utility model, the battery pack further includes: a cover plate and a bottom plate, the cover plate forms a receiving space with an opening downward, the bottom plate forms a receiving space with an opening upward, and the cover plate and the bottom plate are respectively buckled on the upper and lower sides of the protection frame to cover the arrangement area.

[0015] The additional aspects and advantages of the present utility model will be partly given in the following description, partly will become obvious from the following description, or will be understood through the practice of the present utility model. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 is a schematic diagram of a battery pack according to an embodiment of the present utility model;

[0017] Figure 2 is an exploded view of a protection frame, a battery module and a cold plate according to an embodiment of the present utility model;

[0018] Figure 3 is Figure 2 an enlarged view of part A shown in

[0019] Figure 4 is Figure 2 a schematic diagram of the battery module shown in

[0020] Figure 5 is Figure 4 an exploded view of the battery module shown in

[0021] Reference numerals:

[0022] 100, battery pack;

[0023] 10, protective frame; 11, arrangement area; 12, side beam; 13, partition beam;

[0024] 20, battery module; 21, battery pack; 211, battery cell; 22, side plate; 221, supporting flange; 23, end plate; 24, intermediate plate; 25, buffer pad;

[0025] 30, cold plate;

[0026] 40, cover plate. Detailed implementation manners

[0027] Embodiments of the present utility model will be described in detail below. Examples of the embodiments are shown in the accompanying drawings, where the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to explain the present utility model, and should not be construed as limiting the present utility model.

[0028] Next, reference will be made to Figures 1 - 5 to describe the battery pack 100 according to an embodiment of the first aspect of the present utility model.

[0029] As Figure 2 , Figure 4 and Figure 5 shown, the battery pack 100 according to an embodiment of the first aspect of the present utility model includes: a protective frame 10 and a plurality of battery modules 20. For example, the number of battery modules 20 can be two, three or four.

[0030] Specifically, a plurality of spaced-apart arrangement areas 11 are defined within the protective frame 10, and a plurality of battery modules 20 are respectively disposed in the plurality of arrangement areas 11. Each battery module 20 includes a plurality of battery packs 21 stacked in a first direction (for example, the left-right direction shown in Figure 5 ). For example, the number of battery packs 21 can be two, three or four. Each battery pack 21 includes a plurality of battery cells 211 stacked in a second direction (for example, the front-back direction shown in Figure 4 ). Among them, two adjacent battery packs 21 are adhesively connected, and the first direction intersects the second direction.

[0031] It can be understood by those skilled in the art that the energy storage capacity of the battery pack 21 is the sum of the energy storage capacities of a plurality of battery cells 211, the energy storage capacity of the battery module 20 is the sum of the energy storage capacities of a plurality of battery packs 21, and the energy storage capacity of the battery pack 100 is the sum of a plurality of battery modules 20.

[0032] In this embodiment, by arranging a plurality of battery packs 21 in the battery module 20, the energy storage capacity of a single battery module 20 can be increased. In this way, when meeting the energy storage capacity requirement of the battery pack 100, the number of battery modules 20 can be reduced, that is, the number of arrangement areas 11 in the protection frame 10 is reduced. Among them, when separating the arrangement areas 11 in the protection frame 10, the separator will inevitably occupy a part of the space. Reducing the number of distribution areas can reduce the number of separators, thereby improving the space utilization rate inside the battery pack 100. And during the assembly process, the operation steps of assembling the battery module 20 can be reduced, thereby improving the production efficiency.

[0033] By adhesively connecting two adjacent battery packs 21 in the battery module 20, the space occupied by the adhesive layer is small, and the production cost of adhesive connection is low, thereby further improving the space utilization rate inside the battery pack 100 and reducing the production cost.

[0034] During the product design process, the number of battery modules 20 in the battery pack 100, the number of battery packs 21 in the battery module 20, or the number of battery cells 211 in the battery pack 21 can be adjusted to meet more product design requirements.

[0035] According to the battery pack 100 of the embodiment of the present utility model, by arranging a plurality of adhesively connected battery packs 21 in the battery module 20, on the one hand, the energy storage capacity of a single battery module 20 is increased, and when meeting the energy storage capacity requirement of the battery pack 100, the number of battery modules 20 can be reduced. On the other hand, the space occupied by the adhesive layer between the battery packs 21 is smaller, and the adhesive connection cost is lower, thereby improving the space utilization rate inside the battery pack 100 and reducing the production cost.

[0036] In some embodiments of the present utility model, as Figure 2 shown, a plurality of arrangement areas 11 are arranged in sequence in the first direction. That is to say, a plurality of battery modules 20 are arranged in sequence in the first direction. In this way, during the product design process, the connection relationship of each component is relatively simple, thereby reducing the difficulty of product design and the difficulty in product production.

[0037] In some embodiments of the present utility model, as Figure 2 and Figure 3As shown, the protection frame 10 includes a plurality of side beams 12 and at least one partition beam 13. For example, the partition beam 13 can be one, two or three. The plurality of side beams 12 are connected end to end and cooperate to define a protection cavity with upper and lower openings. The partition beam 13 extends in the second direction, and both ends of the partition beam 13 are connected to two side beams 12 arranged oppositely in the second direction. The partition beam 13 divides the protection cavity into a plurality of arrangement areas 11. In this way, the structure of the protection frame 10 is relatively simple, which can further reduce the design difficulty and production difficulty of the product. During the design process, parameters such as the number, size or relative angle of the side beams 12 and the partition beam 13 can be adjusted to meet more product design requirements.

[0038] In some embodiments of the present invention, as Figure 4 and Figure 5 shown, the battery module 20 further includes: side plates 22 and end plates 23. The side plates 22 are bonded to both ends of the battery module 20 in the first direction, and the end plates 23 are bonded to both ends of the battery module 20 in the second direction. The side plates 22 and the end plates 23 are fixedly connected. Thus, the side plates 22 and the end plates 23 can fix a plurality of battery packs 21 around the battery module 20, thereby improving the structural stability of the battery module 20, and further improving the structural stability of the battery pack 100. Moreover, the side plates 22 and the end plates 23 can provide protection for the battery module 20 and improve the reliability during the operation of the battery pack 100. Among them, preferably, the end plates 23 are produced by stamping or integral forming process. In this way, the production efficiency of the end plates 23 is relatively high, and the production cost is relatively low. The end plates 23 and the side plates 22 are connected by riveting, bolting or welding. Thus, the reliability of the connection between the end plates 23 and the side plates 22 can be ensured to meet the use requirements.

[0039] In some embodiments of the present invention, as Figure 3 shown, a support flange 221 is formed at the lower end of the side plate 22, and the support flange 221 is fixedly connected to the upper end of the partition beam 13. Among them, by providing the support flange 221, the contact area between the side plate 22 and the partition beam 13 can be increased, thereby improving the reliability of the connection between the side plate 22 and the partition beam 13. By connecting the side plate 22 to the upper end of the partition beam 13, the occupation of the space in the arrangement area 11 by the side plate 22 can be reduced, thereby further improving the utilization rate of the space in the battery pack 100. Among them, preferably, the support flange 221 and the partition beam 13 are fixed by bolts. The bolt fixing operation is convenient, and the connection reliability is relatively high. Thus, the production efficiency can be further improved and the reliability of the connection between the side plate 22 and the partition beam 13 can be improved.

[0040] In some embodiments of the present invention, as Figure 5As shown, the battery module 20 also includes: a buffer pad 25, the buffer pad 25 is arranged between the end plate 23 and the battery pack 21, and the buffer pad 25 is bonded and connected to the end plate 23 and the battery pack 21 respectively. It can be understood that during the operation of the battery pack 100, as the temperature on the battery module 20 increases, the volume of the battery cell 211 will increase. By providing the buffer pad 25, the buffer pad 25 can absorb the expansion of the battery cell 211, thereby improving the reliability of the connection between the end plate 23 and the side plate 22 during the operation of the battery pack 100. In addition, when the battery pack 100 is impacted, the buffer pad 25 can absorb part of the external impact force, thereby improving the safety of the battery pack 100. Preferably, the buffer pad 25 is made of foam, and the foam can meet the requirements of the buffer pad 25 for the buffering performance, and the foam has good sound insulation performance, which can improve the quiet performance of the battery pack 100 during operation.

[0041] In some embodiments of the present invention, Figure 5 As shown, the battery module 20 further includes: an intermediate plate 24, the intermediate plate 24 extends along the second direction, the intermediate plate 24 is disposed between two adjacent battery packs 21, and the two adjacent battery packs 21 are bonded to both sides of the intermediate plate 24. In this way, a plurality of battery cells 211 in two adjacent battery packs 21 are bonded to both sides of the intermediate plate 24, and the intermediate plate 24 can prevent the displacement of the battery cells 211, thereby improving the structural stability of the battery module 20, wherein the bonding operation of the battery pack 21 and the intermediate plate 24 is relatively convenient, and the bonding layer occupies a relatively small space.

[0042] In some embodiments of the utility model, in the second direction, there is a gap between the end plate 23 and the side beam 12. In the process of product design and product production, the gap can provide a layout space for the wiring harness, thereby reducing the difficulty of product design and production. When the battery pack 100 is hit, the gap can provide an escape space, reducing the probability of the end plate 23 and the side beam 12 colliding when the battery pack 100 is hit, thereby improving the safety of the battery pack 100.

[0043] In some embodiments of the present invention, Figure 2 and Figure 3 As shown, the battery pack 100 also includes: a cold plate 30, which is arranged on the lower side of the protection frame 10 and covers the lower open opening of the protection cavity, the battery module 20 and the cold plate 30 are adhesively connected, and the cold plate 30 is fixedly connected to the side beam 12 and the partition beam 13.

[0044] Among them, the cold plate 30 can absorb the heat generated during the operation of the battery module 20, improving the safety of the battery pack 100. At the same time, the fixed connection between the cold plate 30 and the side beam 12 and the partition beam 13 can provide support for the battery module 20, and the adhesive connection between the battery module 20 and the cold plate 30 can further improve the structural stability of the battery module 20. Preferably, the cold plate 30 is connected to the side beam 12 and the partition beam 13 by welding or bolting, so that the reliability of the connection between the cold plate 30 and the side beam 12 and the partition beam 13 can meet the usage requirements.

[0045] In some embodiments of the present invention, as Figure 1 shown, the battery pack 100 further includes: a cover plate 40 and a bottom plate (not shown in the drawings). The cover plate 40 forms a receiving space with an opening downward, and the bottom plate forms a receiving space with an opening upward. The cover plate 40 and the bottom plate are respectively buckled on the upper and lower sides of the protection frame 10 to cover the layout area 11. Thus, the encapsulation of the battery pack 100 can be realized, and the structure of the battery pack 100 is relatively simple, which can reduce the difficulty in product design and production process. Among them, the receiving spaces on the cover plate 40 and the bottom plate can increase the layout space inside the battery pack 100, facilitating the layout of various components inside the battery pack 100.

[0046] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present invention.

[0047] In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present invention, "a plurality" means two or more, unless otherwise specifically defined.

[0048] In the present utility model, unless otherwise clearly stipulated and defined, terms such as "installation", "connection", "linkage", "fixation", etc. shall be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral one; it may be a mechanical connection, an electrical connection, or a communication connection; it may be a direct connection, or an indirect connection through an intermediate medium, and it may be the internal communication of two components or the interaction relationship between two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0049] In the description of this specification, the description with reference to terms such as "one embodiment", "some embodiments", "example", "specific example", or "some examples", etc. means that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present utility model. In this specification, the schematic expressions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described can be combined in a suitable manner in any one or more embodiments or examples. In addition, without contradiction, those skilled in the art can combine and combine the different embodiments or examples described in this specification and the features of different embodiments or examples.

[0050] Although the embodiments of the present utility model have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and purposes of the present utility model, and the scope of the present utility model is defined by the claims and their equivalents.

Claims

1. A battery pack, characterized in that: include: A protection frame, wherein a plurality of spaced arrangement areas are defined within the protection frame; A plurality of battery modules are respectively arranged in a plurality of arrangement areas, each of the battery modules comprises a plurality of battery packs stacked along a first direction, each of the battery packs comprises a plurality of battery cells stacked along a second direction, wherein two adjacent battery packs are adhesively connected, and the first direction intersects with the second direction.

2. The battery pack according to claim 1, characterized in that: The plurality of arrangement areas are arranged in sequence in the first direction.

3. The battery pack according to claim 2, characterized in that: The protective frame includes a plurality of side beams and at least one partition beam, wherein the plurality of side beams are connected end to end and cooperate to define a protective cavity with upper and lower openings, the partition beam extends along the second direction, and the two ends of the partition beam are connected to two side beams arranged opposite to each other in the second direction, and the partition beam divides the protective cavity into a plurality of arrangement areas.

4. The battery pack according to claim 3, characterized in that: The battery module further includes: a side plate and an end plate, wherein the side plate is bonded to both ends of the battery module in the first direction, and the end plate is bonded to both ends of the battery module in the second direction, and the side plate and the end plate are fixedly connected.

5. The battery pack according to claim 4, characterized in that: A supporting flange is formed at the lower end of the side plate, and the supporting flange is fixedly connected to the upper end of the partition beam.

6. The battery pack according to claim 4, characterized in that: The battery module further includes a buffer pad, which is disposed between the end plate and the battery pack, and is adhesively connected to the end plate and the battery pack, respectively.

7. The battery pack according to any one of claims 1 to 6, characterized in that: The battery module further includes: an intermediate plate extending along the second direction, the intermediate plate being arranged between two adjacent battery packs, and the two adjacent battery packs being adhesively connected to two sides of the intermediate plate.

8. The battery pack according to claim 4, characterized in that: In the second direction, there is a gap between the end plate and the edge beam.

9. The battery pack according to claim 3, characterized in that: Also includes: A cold plate is arranged at the lower side of the protection frame and covers the lower open opening of the protection cavity. The battery module and the cold plate are adhesively connected. The cold plate is fixedly connected to the side beam and the partition beam.

10. The battery pack according to any one of claims 1 to 6, characterized in that: Also includes: A cover plate and a bottom plate, wherein the cover plate forms a housing space opening downward, and the bottom plate forms a housing space opening upward, and the cover plate and the bottom plate are respectively buckled on the upper and lower sides of the protection frame to cover the arrangement area.

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