Battery box and battery pack

Abstract

The utility model discloses a battery box and a battery pack. The battery box comprises a bottom protective plate, a battery box body and a battery box cover, the liquid cooling plate is provided with a plurality of flow channels, and a groove is formed between every two adjacent flow channels; the buffering piece comprises at least one arched part and a flat plate part connected to the arched part, the flat plate part is assembled between the bottom protection plate and the flow channel, the arched part extends into the groove, and a heat insulation cavity is formed by the arched part and the bottom protection plate. According to the utility model, the flat plate part and the arched part of the buffer piece are respectively used for buffering and protecting the runner and the groove, and meanwhile, the arched part extends into the groove, so that a heat insulation cavity is formed between the arched part and the bottom guard plate; according to the liquid cooling plate, the contact area between the buffer piece and the bottom protection plate can be reduced, so that the heat energy loss of the liquid cooling plate is reduced, and the heat loss of equipment is reduced while the liquid cooling plate is comprehensively buffered and protected through the buffer piece.

Description

Technical Field

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

[0002] In the prior art, buffer materials are usually installed between the liquid cooling plate and the bottom guard plate to absorb external shocks and vibrations, thereby reducing stress and vibration inside the battery pack, and isolating the contact between the liquid cooling plate and the bottom guard plate to prevent the two from interfering with each other and causing wear. In conventional processes, in order to ensure the buffering and isolation effects of the buffer material, the buffer material is generally laid flat between the liquid cooling plate and the bottom guard plate so that the buffer material can directly contact the liquid cooling plate and the bottom guard plate. As a result, there is a large contact area between the buffer material and the liquid cooling plate and the bottom guard plate, and it is impossible to effectively prevent heat from being transferred between the liquid cooling plate and the bottom guard plate, resulting in increased heat loss of the liquid cooling plate and a large amount of heat loss. Utility Model Content

[0003] In order to overcome at least one of the defects of the prior art described above, the utility model provides a battery box, which can comprehensively protect various parts of the liquid cooling plate and reduce the heat loss of the equipment.

[0004] A battery box according to an embodiment of the utility model includes: a bottom guard plate; a liquid cooling plate, the liquid cooling plate is provided with a plurality of flow channels, and grooves are formed between adjacent flow channels; a buffer, the buffer includes at least one arched portion and a flat plate portion connected to the arched portion, the flat plate portion is assembled between the bottom guard plate and the flow channel, the arched portion extends into the groove, and an insulating cavity is formed between the arched portion and the bottom guard plate.

[0005] In the present battery box, the flow channel and the groove are buffered and protected respectively by the flat plate portion and the arched portion of the buffer component, and at the same time, the arched portion extends into the groove to form an insulating cavity between the arched portion and the bottom guard plate, which can reduce the contact area between the buffer component and the bottom guard plate, thereby reducing the heat transfer efficiency between the buffer component and the bottom guard plate, reducing the heat energy loss of the liquid cooling plate, and thereby achieving comprehensive buffering protection of the liquid cooling plate by the buffer component while reducing the heat loss of the equipment.

[0006] According to some embodiments of the present invention, the thickness of the arched portion is equal to the thickness of the flat plate portion.

[0007] According to some embodiments of the present invention, there is a gap between the arched portion and the groove.

[0008] According to some embodiments of the present invention, the buffer component is made of foamed heat-insulating material.

[0009] According to some embodiments of the present utility model, heat insulating glue is bonded between the flat plate portion and the flow channel.

[0010] According to some embodiments of the utility model, there are multiple buffer components, and the multiple buffer components are arranged at intervals between the liquid cooling plate and the bottom guard plate so that an assembly channel is formed on at least one side of the buffer component; a fastener is provided in the assembly channel for connecting the liquid cooling plate and the bottom guard plate.

[0011] According to some embodiments of the present utility model, the bottom guard plate is provided with a connecting portion extending into the assembly channel, and the fastener passes through the liquid cooling plate and is connected to the connecting portion.

[0012] According to some embodiments of the present invention, a box frame is further included, and the box frame is installed on a side of the liquid cooling plate away from the bottom guard plate to form a battery accommodating cavity.

[0013] According to some embodiments of the utility model, a thermally conductive adhesive is provided in the battery accommodating cavity, and the thermally conductive adhesive is adhered to a side of the liquid cooling plate away from the bottom guard plate.

[0014] According to the same inventive concept, the utility model also proposes a battery pack, characterized in that it includes the battery box as described above.

[0015] In summary, the battery box provided by the utility model has the following technical effects:

[0016] The flat plate portion and the arched portion of the buffer component are used to provide buffering protection for the flow channel and the groove respectively, and the arched portion extends into the groove to form a heat-insulating cavity between the arched portion and the bottom guard plate, thereby reducing the contact area between the buffer component and the bottom guard plate, thereby reducing the heat transfer efficiency between the buffer component and the bottom guard plate, reducing the heat energy loss of the liquid cooling plate, and thereby achieving comprehensive buffering protection for the liquid cooling plate by the buffer component while reducing the heat loss of the equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a schematic diagram of the structure of a battery box according to an embodiment of the utility model;

[0018] Figure 2 It is another structural schematic diagram of the battery box of the embodiment of the utility model;

[0019] Figure 3 for Figure 2 AA direction cross-sectional view;

[0020] Figure 4 for Figure 3A magnified schematic diagram of region B;

[0021] Figure 5 for Figure 3 Schematic diagram of the enlarged C region;

[0022] Figure 6 This is a schematic diagram of the structure of the buffer member according to an embodiment of the utility model;

[0023] Figure 7 It is a schematic structural diagram of the bottom guard plate of an embodiment of the utility model.

[0024] The meanings of the reference numerals are as follows:

[0025] 1. Bottom guard plate; 11. Connection part; 2. Liquid cooling plate; 21. Flow channel; 22. Groove; 3. Buffer; 31. Arched part; 32. Flat part; 33. Insulation cavity; 34. Assembly channel; 4. Box frame. DETAILED DESCRIPTION

[0026] For better understanding and implementation, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention.

[0027] In the description of the present invention, it should be noted that the terms "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside" and "outside" etc. indicating directions or positional relationships are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation on the present invention.

[0028] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art of the present invention. The terms used herein in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention.

[0029] See also Figure 1 , Figure 2 , Figure 3 and Figure 4The utility model discloses a battery box, which includes a bottom guard plate 1, a liquid cooling plate 2 and a buffer 3. In some embodiments, the liquid cooling plate 2 is provided with a plurality of flow channels 21, and grooves 22 are formed between adjacent flow channels 21; the buffer 3 includes at least one arched portion 31 and a flat plate portion 32 connected to the arched portion 31, the flat plate portion 32 is assembled between the bottom guard plate 1 and the flow channel 21, the arched portion 31 extends into the groove 22, and an insulating cavity 33 is formed between the arched portion 31 and the bottom guard plate 1. Preferably, the flat portion 32 and the arched portion 31 of the buffer 3 are used to buffer and protect the flow channel 21 and the groove 22 respectively, and the arched portion 31 extends into the groove 22 to form an insulating cavity 33 between the arched portion 31 and the bottom guard plate 1, which can reduce the contact area between the buffer 3 and the bottom guard plate 1, thereby reducing the heat transfer efficiency between the buffer 3 and the bottom guard plate 1, reducing the heat energy loss of the liquid cooling plate 2, and thereby achieving comprehensive buffering protection of the liquid cooling plate 2 by the buffer 3 while reducing the heat loss of the equipment.

[0030] Optionally, the liquid cooling plate 2, the buffer member 3 and the bottom guard plate 1 are stacked in sequence from top to bottom, that is, the upper end of the flat plate portion 32 abuts against the lower end of the flow channel 21, and the lower end of the flat plate portion 32 abuts against the upper end of the bottom guard plate 1, and the arched portion 31 arches upward and extends into the groove 22, so that the lower end of the arched portion 31 forms a recessed structure, driving the lower end of the arched portion 31 and the bottom guard plate 1 to form an insulating cavity 33, thereby reducing the contact area between the buffer member 3 and the bottom guard plate 1, thereby reducing the heat transfer efficiency between the buffer member 3 and the bottom guard plate 1, and reducing the heat energy loss of the liquid cooling plate 2. At the same time, since the arched portion 31 is provided at the lower end of the groove 22, the arched portion 31 can still provide buffering protection for the groove 22 to enter and exit, that is, the buffer member 3 can not only reduce the heat loss of the equipment, but also protect the flow channel 21 and the groove 22 of the liquid cooling plate 2.

[0031] See also Figure 1 , Figure 2 , Figure 3 and Figure 4In some embodiments, the thickness of the arched portion 31 is equal to the thickness of the flat plate portion 32 . That is, the thickness of each part of the buffer 3 is consistent, so the buffering effect of the arched portion 31 on the groove 22 is the same as the buffering effect of the flat portion 32 on the flow channel 21, so that each part of the liquid cooling plate 2 can obtain uniform buffering protection, effectively avoiding the problem that the local area is significantly weaker than other areas; in this embodiment, the flat portion 32 of a predetermined thickness is assembled between the bottom guard plate 1 and the flow channel 21, so that the flat portion 32 buffers the flow channel 21, and at the same time, the arched portion 31 of the same thickness is arched upward and extended into the groove 22, so that the arched portion 31 has the same buffering protection effect on the groove 22, and the lower end of the arched portion 31 can form a heat-insulating cavity 33 with the bottom guard plate 1, reducing the contact area between the buffer 3 and the bottom guard plate 1, thereby reducing the heat transfer between the liquid cooling plate 2 and the bottom guard plate 1, and thereby reducing the heat loss of the liquid cooling plate 2. Further, the thickness of the buffer 3 can be adjusted according to actual needs.

[0032] See also Figure 4 In some embodiments, there is a gap between the arched portion 31 and the groove 22. Optionally, the depth of the groove 22 is greater than the height of the arched portion 31, so that there is a gap between the upper end of the arched portion 31 and the bottom of the groove 22. Furthermore, the depth of the groove 22 is greater than the height of the arched portion 31, and the inner diameter of the groove 22 is greater than the outer diameter of the arched portion 31, so that there is a gap between the upper surface of the arched portion 31 and the inside of the groove 22, thereby reducing the contact area between the buffer 3 and the liquid cooling plate 2, and reducing the heat transfer efficiency between the buffer 3 and the liquid cooling plate 2. The arched portion 31 extending into the groove 22 forms an insulating cavity 33 with the bottom guard plate 1, further reducing the contact area between the buffer 3 and the bottom guard plate 1, and reducing the heat transfer efficiency between the buffer 3 and the bottom guard plate 1. Therefore, the buffer 3 in this embodiment can simultaneously reduce the contact area between the buffer 3 and the liquid cooling plate 2 and between the buffer 3 and the bottom guard plate 1, forming multiple thermal insulation, thereby fully reducing the heat transfer efficiency, reducing the heat energy loss of the liquid cooling plate 2, and achieving a significant reduction in heat loss.

[0033] Furthermore, when assembling the equipment, the buffer component 3 can be limited on the liquid cooling plate 2 by inserting the arched portion 31 on the buffer component 3 into the corresponding groove 22 on the liquid cooling plate 2. In addition, since there is a gap between the arched portion 31 and the groove 22, there is a certain margin for fine-tuning the position when assembling the buffer component 3, thereby optimizing the assembly process and improving the assembly efficiency.

[0034] In some embodiments, the buffer 3 is made of foam insulation material. That is, the flat plate portion 32 and the arched portion 31 are both made of the foam insulation material. The foam insulation material includes but is not limited to one or more materials such as EPS, PU, ​​XPP, MPP, XPE, EPE, etc. Preferably, the buffer 3 uses materials collectively referred to as foam such as XPP and MPP, so that the buffer 3 has excellent shock absorption, sound insulation and buffering properties, can effectively disperse the impact force when under pressure, and improve the protective effect of the buffer 3 on the liquid cooling plate 2, and the foam has a closed-cell structure, which means that its pores are closed and not connected to the outside world, so that the buffer 3 can prevent the heat conduction of the liquid cooling plate 2 and reduce the heat loss of the liquid cooling plate 2. Furthermore, the foam has a surface with high reflectivity, so that the buffer 3 made of foam can reflect heat radiation back to the source, which can further reduce the absorption and conduction of heat and improve the thermal insulation performance of the buffer 3.

[0035] In some embodiments, a heat-insulating adhesive is bonded between the flat plate portion 32 and the flow channel 21. Optionally, the heat-insulating adhesive is a structural adhesive with a low thermal conductivity coefficient, and optionally, the structural adhesive with a low thermal conductivity coefficient includes silicone, thermosetting polymer, thermal grease, etc., so that the flat plate portion 32 and the flow channel 21 are bonded by the heat-insulating adhesive, which can effectively reduce the conduction of heat at the joint between the buffer 3 and the bottom guard plate 1, improve the thermal insulation performance, and at the same time, there is a gap between the upper surface of the arched portion 31 and the inside of the groove 22, so as to fully block the heat conduction between the liquid cooling plate 2 and the buffer 3.

[0036] See also Figure 6 In some embodiments, there are multiple buffer members 3, and the multiple buffer members 3 are arranged at intervals between the liquid cooling plate 2 and the bottom guard plate 1, so that at least one side of the buffer member 3 forms an assembly channel 34; a fastener is provided in the assembly channel 34 for connecting the liquid cooling plate 2 and the bottom guard plate 1. Optionally, the fastener can be a bolt, a screw or a rivet, etc. Preferably, by arranging the fastener in the assembly channel 34, the bottom guard plate 1 can be directly connected to the liquid cooling plate 2 through the fastener, without punching the buffer member 3, optimizing the assembly process, and at the same time, the multiple buffer members 3 arranged at intervals can be limited in different areas to prevent the buffer member 3 from shifting under the influence of the outside world.

[0037] See also Figure 5 and Figure 7In some embodiments, the bottom guard plate 1 is provided with a connection portion 11 extending into the assembly channel 34, and the fastener passes through the liquid cooling plate 2 and is connected to the connection portion 11. Optionally, the connection portion 11 can be formed by the bottom guard plate 1 protruding toward the liquid cooling plate 2. During assembly, under the locking action of the fastener, the connection portion 11 can extend into the assembly channel 34 to avoid the bottom guard plate 1 and the liquid cooling plate 2 being suspended in the air, so that the bottom guard plate 1 and the liquid cooling plate 2 form a reliable connection, and improve the strength of the connection. Furthermore, the position of the assembly channel 34 is opposite to the position of the cross beam and / or longitudinal beam in the battery box, and the fastener can further pass through the liquid cooling plate 2 and be connected to the cross beam and / or longitudinal beam in the battery box, so that the bottom guard plate 1, the liquid cooling plate 2 and the cross beam and / or longitudinal beam in the battery box form a stable whole, thereby improving the strength of the battery as a whole.

[0038] See also Figure 1 and Figure 2 In some embodiments, a box frame 4 is further included, and the box frame 4 is mounted on a side of the liquid cooling plate 2 away from the bottom guard plate 1 to form a battery accommodating cavity. Optionally, the box frame 4 is surrounded by a plurality of side panels, so that the interior of the box frame 4 is a hollow structure, and openings are provided at both the upper and lower ends. Optionally, the lower opening of the box frame 4 is connected to the upper end of the liquid cooling plate 2, so as to form the battery accommodating cavity for accommodating batteries. At the same time, the buffer 3 can block the heat conduction of the liquid cooling plate 2 at the lower end of the liquid cooling plate 2, reduce the heat loss of the liquid cooling plate 2, and enable the liquid cooling plate 2 to reduce the power loss increased by cooling and dissipating the heat of the battery.

[0039] In some embodiments, a thermally conductive adhesive is provided in the battery receiving cavity, and the thermally conductive adhesive is attached to the side of the liquid cooling plate 2 away from the bottom guard plate 1. That is, the liquid cooling plate 2 can abut against the battery in the battery receiving cavity through the thermally conductive adhesive, so that the liquid cooling plate 2 and the battery in the battery receiving cavity are in more complete contact, the heat transfer efficiency between the liquid cooling plate 2 and the battery in the battery receiving cavity is improved, and the heat dissipation and cooling effect on the battery is optimized.

[0040] In some embodiments, a battery pack includes the battery box as described above.

[0041] See also Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 and Figure 7In some embodiments, the battery includes at least one battery box, and the battery box includes the box frame 4, the liquid cooling plate 2, the buffer member 3 and the bottom guard plate 1 arranged in sequence from top to bottom. Preferably, the lower end of the liquid cooling plate 2 is provided with a plurality of downwardly protruding flow channels 21, and grooves 22 are formed between adjacent flow channels 21. In this embodiment, the flow channels 21 and the grooves 22 are buffered and protected by the flat plate portion 32 and the arched portion 31 of the buffer member 3, respectively. Specifically, the upper end of the flat plate portion 32 abuts against the lower end of the flow channel 21, and the lower end abuts against the upper end of the bottom guard plate 1. , so that the flat plate portion 32 can buffer and protect the flow channel 21. Furthermore, the arched portion 31 extends into the groove 22, so that the arched portion 31 and the bottom guard plate 1 form a heat-insulating cavity 33, which can reduce the contact area between the buffer 3 and the bottom guard plate 1, thereby reducing the heat transfer efficiency between the buffer 3 and the bottom guard plate 1, and reducing the heat loss of the liquid cooling plate 2. Preferably, the thickness of the arched portion 31 is equal to the thickness of the flat plate portion 32, so that the arched portion 31 can have the same buffering effect as the flat plate portion 32, so that each part of the liquid cooling plate 2 can obtain uniform Buffering protection can effectively avoid the problem that some areas are significantly weaker than other areas. There is a gap between the arched portion 31 and the groove 22, and a heat-insulating glue is bonded between the flat plate portion 32 and the flow channel 21, which can effectively reduce the area of ​​the joint between the buffer 3 and the bottom guard plate 1, as well as the conduction of heat in the joint, improve the thermal insulation performance, and completely block the heat conduction between the liquid cooling plate 2 and the buffer 3, reduce the heat transfer efficiency between the buffer 3 and the liquid cooling plate 2, and realize the comprehensive buffering protection of the liquid cooling plate 2 by the buffer 3, while reducing the heat loss of the equipment; at the same time The lower opening of the box frame 4 is connected to the upper end of the liquid cooling plate 2, thereby forming the battery accommodating cavity for accommodating the battery, and the thermal conductive adhesive is pasted on the side of the liquid cooling plate 2 away from the bottom guard plate 1, so that the liquid cooling plate 2 is in more complete contact with the battery in the battery accommodating cavity, thereby improving the heat transfer efficiency between the liquid cooling plate 2 and the battery in the battery accommodating cavity, optimizing the heat dissipation and cooling effect on the battery, and at the same time, the buffer member 3 is used to block the heat conduction of the liquid cooling plate 2 at the lower end of the liquid cooling plate 2, thereby reducing the heat energy loss of the liquid cooling plate 2, so that the liquid cooling plate 2 can reduce the power loss increased by cooling the battery.

[0042] The technical means disclosed in the solution of the utility model are not limited to the technical means disclosed in the above-mentioned implementation mode, but also include technical solutions composed of any combination of the above technical features. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principle of the utility model, and these improvements and modifications are also regarded as the protection scope of the utility model.

Claims

1. A battery box, characterized in that: include: Bottom guard plate (1); A liquid cooling plate (2), wherein the liquid cooling plate (2) is provided with a plurality of flow channels (21), and grooves (22) are formed between adjacent flow channels (21); A buffer member (3), the buffer member (3) comprising at least one arched portion (31) and a flat plate portion (32) connected to the arched portion (31), the flat plate portion (32) being mounted between the bottom guard plate (1) and the flow channel (21), the arched portion (31) extending into the groove (22), and a heat insulating cavity (33) being formed between the arched portion (31) and the bottom guard plate (1).

2. The battery box according to claim 1, characterized in that: The thickness of the arched portion (31) is equal to the thickness of the flat plate portion (32).

3. The battery box according to claim 1, characterized in that: There is a gap between the arched portion (31) and the groove (22).

4. The battery box according to claim 1, characterized in that: The buffer member (3) is made of foamed heat-insulating material.

5. The battery box according to claim 1, characterized in that: Heat-insulating glue is bonded between the flat plate portion (32) and the flow channel (21).

6. The battery box according to any one of claims 1 to 5, characterized in that: There are a plurality of the buffer components (3), and the plurality of the buffer components (3) are arranged at intervals between the liquid cooling plate (2) and the bottom guard plate (1), so that an assembly channel (34) is formed on at least one side of the buffer component (3); The assembly channel (34) is provided with a fastener for connecting the liquid cooling plate (2) and the bottom guard plate (1).

7. The battery box according to claim 6, characterized in that: The bottom guard plate (1) is provided with a connecting portion (11) extending into the assembly channel (34), and the fastener passes through the liquid cooling plate (2) and is connected to the connecting portion (11).

8. The battery box according to any one of claims 1 to 5, characterized in that: It also includes a box frame (4), which is mounted on a side of the liquid cooling plate (2) away from the bottom guard plate (1) and is used to form a battery accommodating cavity.

9. The battery box according to claim 8, characterized in that: A heat-conducting adhesive is provided in the battery accommodating cavity, and the heat-conducting adhesive is adhered to a side of the liquid cooling plate (2) away from the bottom guard plate (1).

10. A battery pack, characterized in that: Comprising a battery box as described in any one of claims 1-9.

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