Liquid cooling plate structure, battery box body and battery pack

Abstract

The utility model belongs to the technical field of batteries, and discloses a liquid cooling plate structure, a battery box body and a battery pack, the liquid cooling plate structure comprises a liquid cooling bottom plate, a plurality of bosses are arranged on the liquid cooling bottom plate, and an adhesive runner for filling and flowing of heat conduction structural adhesive is formed between every two adjacent bosses. The battery modules are placed on the bosses and are respectively connected with the bosses and the liquid cooling bottom plate through heat-conducting structural adhesive, each battery module comprises a plurality of battery cells which are arranged side by side along the length direction of the bosses, and the bottom of each battery cell is at least connected with two bosses; a plurality of liquid cooling flow channels are arranged in the liquid cooling bottom plate, and the length direction of the liquid cooling flow channels is parallel to the length direction of the boss. According to the liquid cooling plate structure, the battery box body and the battery pack disclosed by the utility model, the heat dissipation and cooling uniformity and the cooling efficiency of the battery module can be effectively improved.

Description

Technical Field

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

[0002] At present, in the structural design of a battery pack, the cell mounting surface on the upper surface of the liquid cooling plate is generally a whole flat plate. The bottom of the cell and the liquid cooling plate are bonded and fixed through a thermal conductive structural adhesive. Due to the large self-weight of the cell, the thermal conductive structural adhesive will be extruded out of the contact surface between the cell and the liquid cooling plate, resulting in only a small amount of thermal conductive structural adhesive remaining between the cell and the liquid cooling plate finally, so that the bonding and fixing effect between the cell and the liquid cooling plate is reduced. Moreover, during the process of cell installation, because the cells are installed in a certain order, the thermal conductive structural adhesive extruded by the first installed cells will accumulate and affect the installation of subsequent cells, resulting in poor uniformity of the thermal conductive structural adhesive between the whole battery module and the liquid cooling plate, making the consistency of heat dissipation and fixing of the battery module poor, and affecting the overall quality and performance of the battery pack. Summary of the Utility Model

[0003] The purpose of the utility model is to provide a liquid cooling plate structure, a battery box body and a battery pack, which can effectively improve the heat dissipation cooling uniformity and cooling efficiency of a battery module.

[0004] To achieve the above purpose, the utility model adopts the following technical solutions:

[0005] On the one hand, a liquid cooling plate structure is provided, which includes a liquid cooling bottom plate. A plurality of bosses are arranged side by side on the liquid cooling bottom plate. A glue flow channel for filling and flowing the thermal conductive structural adhesive is formed between two adjacent bosses. A battery module is placed on the bosses and is connected to the bosses and the liquid cooling bottom plate respectively through the thermal conductive structural adhesive. The battery module includes a plurality of cells arranged side by side along the length direction of the bosses. At least two bosses are connected to the bottom of each cell.

[0006] In one embodiment, a plurality of liquid cooling channels are arranged in the liquid cooling bottom plate. The liquid cooling channels are arranged adjacent to the bosses, and the length direction of the liquid cooling channels is parallel to the length direction of the bosses.

[0007] In one embodiment, the liquid cooling channels are arranged directly below the bosses.

[0008] In one embodiment, the upper opening surface of the liquid cooling channel is attached to the bottom surface of the boss.

[0009] In one embodiment, a liquid cooling groove is arranged at one end of the boss connected to the liquid cooling bottom plate, and the liquid cooling groove is communicated with the liquid cooling channel.

[0010] In one embodiment, the side surface of the boss connected to the battery cell is wavy or serrated.

[0011] In one embodiment, the height of the boss is set to 1-2 mm.

[0012] On the other hand, a battery box body is further provided, including a frame structure and the above liquid cooling plate structure. The frame structure includes side plates connected to the liquid cooling bottom plate. The liquid cooling plate and the side plates enclose a placement cavity for placing the battery module.

[0013] In one embodiment, the frame structure includes side frames arranged on both sides of the liquid cooling bottom plate. The side frames are provided with liquid cooling channels, and a diversion port for communicating the liquid cooling channels with the liquid cooling flow channels in the liquid cooling bottom plate is provided on one side of the side frames connected to the liquid cooling bottom plate.

[0014] In yet another aspect, a battery pack is further provided, including a battery module and the above battery box body. The battery module is placed in the placement cavity, and the battery module is connected to the liquid cooling bottom plate through the thermal conductive structural adhesive.

[0015] Advantages of the present utility model:

[0016] For a liquid cooling plate structure of the present utility model, by providing a plurality of bosses on the liquid cooling bottom plate to increase the contact area between the liquid cooling plate structure and the battery module, it is beneficial to improve the heat dissipation and cooling efficiency of the battery module. In addition, by providing a plurality of bosses and forming an adhesive flow channel between adjacent two bosses, the flow of the thermal conductive structural adhesive in the adhesive flow channel is restricted, avoiding the random diffusion and flow of the thermal conductive structural adhesive, and effectively solving the problem of uneven thermal conductive structural adhesive at the bottoms of different battery cells caused by the sequential installation of the battery cells, and ensuring the heat dissipation and cooling uniformity of the battery module.

[0017] Among them, at least two bosses are connected to the bottom of each battery cell, that is, it is ensured that at least one adhesive flow channel is provided at the bottom of each battery cell, ensuring that enough thermal conductive structural adhesive is filled at the bottom of each battery cell and ensuring the firm bonding of the battery cells. And, through the setting of at least two bosses at the bottom of each battery cell, it can play a certain restrictive role on the thermal conductive structural adhesive in the adhesive flow channel, avoiding the thermal conductive structural adhesive flowing into other adhesive flow channels, further ensuring the uniformity of the thermal conductive structural adhesive at the bottom of each battery cell, and thus ensuring the overall heat dissipation and cooling uniformity of the battery module. Description of the drawings

[0018] Figure 1 is a schematic structural diagram of a liquid cooling plate structure in one embodiment;

[0019] Figure 2 is Figure 1 an enlarged structural diagram of part A in

[0020] Figure 3 It is a schematic structural diagram of one of the liquid cooling channels in an embodiment;

[0021] Figure 4 It is a schematic structural diagram of the second of the liquid cooling channels in an embodiment;

[0022] Figure 5 It is a schematic structural diagram of the third of the liquid cooling channels in an embodiment;

[0023] Figure 6 It is a schematic structural diagram of the fourth of the liquid cooling channels in an embodiment;

[0024] Figure 7 It is a schematic structural diagram of the fifth of the liquid cooling channels in an embodiment;

[0025] Figure 8 It is a schematic structural diagram of the sixth of the liquid cooling channels in an embodiment;

[0026] Figure 9 It is a schematic structural diagram of a battery box in an embodiment;

[0027] Figure 10 It is a schematic structural diagram of a liquid cooling bottom plate and a frame in an embodiment;

[0028] Figure 11 It is a schematic structural diagram of a battery pack in an embodiment.

[0029] In the figure:

[0030] 100, liquid cooling bottom plate; 110, boss; 111, liquid cooling groove; 120, adhesive flow channel; 130, liquid cooling channel; 200, battery module; 210, battery cell; 300, thermally conductive structural adhesive; 400, frame structure; 410, frame; 411, liquid cooling channel; 412, diversion port; 420, placement cavity; 500, battery pack. Detailed implementation manners

[0031] The present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It can be understood that the specific embodiments described herein are only used to explain the present utility model, rather than limiting the present utility model. Additionally, it should be noted that for the sake of description, only parts related to the present utility model rather than all structures are shown in the accompanying drawings.

[0032] In the description of the present utility model, unless otherwise clearly defined and limited, the terms "connected", "connected to", and "fixed" shall be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or integrated; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the communication inside 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.

[0033] In the present utility model, unless otherwise clearly defined and limited, the first feature being "above" or "below" the second feature may include the direct contact between the first and second features, or may include the situation where the first and second features are not in direct contact but in contact through other features therebetween. Moreover, the first feature being "above", "over", and "on top of" the second feature includes that the first feature is directly above and obliquely above the second feature, or merely indicates that the horizontal height of the first feature is higher than that of the second feature. The first feature being "below", "beneath", and "under" the second feature includes that the first feature is directly below and obliquely below the second feature, or merely indicates that the horizontal height of the first feature is lower than that of the second feature.

[0034] In the description of this embodiment, the orientation or positional relationships such as "above", "below", "right", etc. are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of description and simplifying the operation, rather than indicating or implying that the device or component referred to must have a specific orientation, be constructed and operated in a specific orientation, so it cannot be understood as a limitation to the present utility model. In addition, the terms "first" and "second" are only used for distinction in description and have no special meanings.

[0035] As Figures 1 to 2 shown, a liquid cooling plate structure of this embodiment includes a liquid cooling bottom plate 100. A plurality of bosses 110 are provided on the liquid cooling bottom plate 100. A glue flow channel 120 for filling and flowing of the thermally conductive structural adhesive 300 is formed between two adjacent bosses 110. The battery module 200 is placed on the bosses 110 and is connected to the bosses 110 and the liquid cooling bottom plate 100 respectively through the thermally conductive structural adhesive 300. The battery module 200 includes a plurality of battery cells 210 arranged side by side along the length direction of the bosses 110. At least two bosses 110 are connected to the bottom of each battery cell 210. A plurality of liquid cooling channels 130 are provided in the liquid cooling bottom plate 100, and the length direction of the liquid cooling channels 130 is arranged parallel to the length direction of the bosses 110.

[0036] In this embodiment, by providing a plurality of bosses 110 on the liquid-cooled bottom plate 100, the contact area between the liquid-cooled plate structure and the battery module 200 is increased, which is beneficial to improving the heat dissipation and cooling efficiency of the battery module 200. In addition, by providing a plurality of bosses 110 and forming an adhesive flow channel 120 between two adjacent bosses 110, the flow of the thermally conductive structural adhesive 300 in the adhesive flow channel 120 is restricted, preventing the random diffusion and flow of the thermally conductive structural adhesive 300, and effectively solving the problem of uneven thermally conductive structural adhesive 300 at the bottoms of different battery cells 210 caused by the sequential installation of the battery cells 210, ensuring the uniformity of heat dissipation and cooling of the battery module 200.

[0037] Wherein, at least two bosses 110 are connected to the bottom of each battery cell 210, which ensures that at least one adhesive flow channel 120 is provided at the bottom of each battery cell 210, ensuring that sufficient thermally conductive structural adhesive 300 is filled at the bottom of each battery cell 210 and ensuring the firm bonding of the battery cell 210. Moreover, by providing at least two bosses 110 at the bottom of each battery cell 210, a certain restricting effect can be exerted on the thermally conductive structural adhesive 300 in the adhesive flow channel 120, preventing the thermally conductive structural adhesive 300 from flowing into other adhesive flow channels 120, further ensuring the uniformity of the thermally conductive structural adhesive 300 at the bottom of each battery cell 210, and thus ensuring the uniformity of the overall heat dissipation and cooling of the battery module 200.

[0038] In one embodiment, a plurality of liquid-cooling channels 130 are provided in the liquid-cooled bottom plate 100, and the length direction of the liquid-cooling channels 130 is arranged parallel to the length direction of the bosses 110, so that the heat conduction between the coolant in the liquid-cooling channels 130 and the bosses 110 is uniform, and the bosses 110 uniformly dissipate heat from and cool the battery cells 210 arranged above the bosses 110, improving the uniformity of heat dissipation and cooling of the liquid-cooled bottom plate 100 for the battery cells 210.

[0039] Furthermore, as Figure 3 shown, the liquid-cooling channels 130 are arranged adjacent to the bosses 110. Specifically, the liquid-cooling channels 130 located on both sides in the width direction of each boss 110 are arranged adjacent to the boss 110 along the width direction and the height direction of the boss 110. In actual operation, the liquid-cooled bottom plate 100 and the bosses 110 are a metal liquid-cooled plate and metal bosses 110 respectively. Generally, the thermal conductivity coefficient of the thermally conductive structural adhesive 300 is less than that of the metal, and there is less thermally conductive structural adhesive 300 between the upper surface of the boss 110 and the bottom of the battery cell 210. The boss 110 forms a heat bridge in the cooling heat conduction of the coolant to the battery cell 210. Therefore, arranging the liquid-cooling channels 130 adjacent to the bosses 110 is beneficial to enabling rapid conduction through the bosses 110 to quickly cool down the battery cells 210 and improving the efficiency of cooling and temperature reduction.

[0040] In this embodiment, as Figure 3As shown, a part of the liquid cooling channels 130 on both sides of the boss 110 coincides with the projection of the boss 110 on the horizontal plane, so as to improve the cooling effect of the liquid cooling channels 130 on the battery cell 210 through the boss 110.

[0041] In one embodiment, as Figure 4 shown, the liquid cooling channels 130 are arranged directly below the boss 110, and the liquid cooling channels 130 are arranged adjacent to the boss 110 along the height direction of the boss 110, that is, the boss 110 and the liquid cooling channels 130 are as close as possible, shortening the heat conduction path of the cooling liquid in the liquid cooling channels 130, so as to achieve the effect of further quickly cooling the battery cell 210 through the boss 110 and improving the cooling efficiency.

[0042] Furthermore, the upper opening surface of the liquid cooling channel 130 is attached to the bottom surface of the boss 110, so that the cooling liquid in the cold channel can directly contact the boss 110, thereby directly conducting heat through the boss 110 to further improve the cooling effect and cooling efficiency on the battery cell 210. Specifically, as Figure 5 and Figure 6 shown, in actual operation, it can be set that the entire upper opening surface of the liquid cooling channel 130 is attached to the ground of the boss 110, or a part of the upper opening surface of the liquid cooling channel 130 is attached to the ground of the boss 110. Such designs are all within the protection scope of the present utility model.

[0043] Even further, a liquid cooling groove 111 is provided at one end of the boss 110 connected to the liquid cooling bottom plate 100, and the liquid cooling groove 111 is communicated with the liquid cooling channel 130, so that the cooling liquid in the liquid cooling channel 130 can directly enter the liquid cooling groove 111 of the boss 110, thereby further shortening the heat conduction path of the cooling liquid for cooling the battery cell, and achieving a further improvement in the cooling effect on the battery cell 210. Specifically, in actual operation, the positional relationship between the liquid cooling channel 130 and the boss 110 can be designed as Figure 7 or Figure 8 shown, so that when the liquid cooling channel 130 is filled with the cooling liquid, a part of the cooling liquid is directly located in the liquid cooling groove 111 of the boss 110, so as to directly and quickly cool the battery cell 210 through the boss 110.

[0044] Of course, this embodiment does not limit the positional relationship and related structures between the liquid cooling channel 130 and the boss 110 within the scope of the above embodiments. As long as the cooperation between the liquid cooling channel 130 and the boss 110 can achieve the effect of quickly cooling the battery cell 210, such designs are all within the protection scope of the present utility model.

[0045] In one embodiment, one side of the boss 110 connected to the battery cell 210 is arranged in a wavy or serrated shape. By using the gaps on the wavy or serrated surface, a certain degree of thermally conductive structural adhesive 300 is retained between the wavy or serrated surface of the boss 110 and the battery cell 210, improving the bonding firmness between the boss 110 and the battery cell 210. Of course, in other embodiments, the connecting surface between the boss 110 and the battery cell 210 can also adopt a non-smooth surface with other structures, such as a connecting surface with a relatively high roughness avoided, or set to other shapes such as pulse shapes, as long as a certain degree of thermally conductive structural adhesive 300 can be retained between the connecting surface of the boss 110 and the battery cell 210 to ensure the mutual bonding firmness. Such designs all fall within the protection scope of the present utility model.

[0046] In one embodiment, the height of the boss 110 is set to 1 - 2 mm. Correspondingly, the height of the adhesive flow channel 120 is 1 - 2 mm, so as to ensure a 1 - 2 mm gap is left between the battery cell 210 and the liquid cooling bottom plate 100, ensure that enough thermally conductive structural adhesive 300 can be filled between the battery cell 210 and the liquid cooling bottom plate 100, and ensure the firm bonding between the battery cell 210 and the liquid cooling bottom plate 100. In practical applications, when the height of the boss 110 is set to 1 mm, on the premise of ensuring that enough thermally conductive structural adhesive 300 can be filled between the battery cell 210 and the liquid cooling bottom plate 100, it can also avoid the excessive distance between the battery cell 210 and the liquid cooling bottom plate 100 from affecting the cooling effect.

[0047] On the other hand, as Figure 9 and Figure 10 shown, a battery box body is also provided, which includes a frame structure 400 and the above-mentioned liquid cooling plate structure. The frame structure 400 includes side plates connected to the liquid cooling bottom plate 100. The liquid cooling plate and the side plates enclose a placement cavity 420 for placing the battery module 200.

[0048] Specifically, the frame structure 400 includes side frames 410 arranged on both sides of the liquid cooling bottom plate 100. The side frames 410 are provided with liquid cooling channels 411. One side of the side frames 410 connected to the liquid cooling bottom plate 100 is provided with a diversion port 412 for communicating the liquid cooling channel 411 with the liquid cooling flow channel 130 inside the liquid cooling bottom plate 100. By arranging the liquid cooling channels 411 on the side frames 410 and opening the diversion port 412 on the side frames 410 for communicating the liquid cooling channel 411 with the liquid cooling flow channel 130, the input and output of the coolant to the liquid cooling flow channel 130 on the liquid cooling bottom plate 100 are realized through the side frames 410. By transporting the coolant through the side frames 410, the overall frame structure 400 can also be cooled to a certain extent by the coolant, and a certain degree of heat conduction can be carried out on the battery cell 210 through the frame structure 400 to realize the cooling of the battery cell 210, improving the efficiency of cooling.

[0049] On another aspect, asFigure 11 As shown in the figure, a battery pack 500 is further provided, which includes a battery module 200 and the above-mentioned battery box. The battery module 200 is placed in the placement cavity 420. The battery module 200 is connected to the liquid-cooled bottom plate 100 through a thermally conductive structural adhesive 300 to bond and fix the battery module 200 to the liquid-cooled bottom plate 100, and the battery module 200 is cooled by the liquid-cooled bottom plate 100. In this embodiment, through the above liquid-cooled plate structure and the battery box, the uniformity and cooling efficiency of the cooling of the battery module 200 of the battery pack 500 can be improved, which is beneficial to ensuring the normal operation and safe operation of the battery pack 500.

[0050] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, rather than limiting the implementation manners of the present invention. For those of ordinary skill in the art, various obvious changes, re-adjustments and substitutions can be made without departing from the protection scope of the present invention. It is not necessary and impossible to enumerate all the implementation manners here. Any modifications, equivalent substitutions and improvements made within the spirit and principle of the present invention shall be included in the protection scope of the claims of the present invention.

Claims

1. A liquid cooling plate structure, characterized in that, It includes a liquid-cooled bottom plate (100), on which a plurality of bosses (110) are arranged side by side. A glue flow channel (120) for filling and flowing of a thermally conductive structural adhesive (300) is formed between two adjacent bosses (110). A battery module (200) is placed on the bosses (110) and is connected to the bosses (110) and the liquid-cooled bottom plate (100) respectively through the thermally conductive structural adhesive (300). The battery module (200) includes a plurality of battery cells (210) arranged side by side along the length direction of the bosses (110), and at least two bosses (110) are connected to the bottom of each battery cell (210).

2. The liquid cooling plate structure according to claim 1, characterized in that, A plurality of liquid-cooled channels (130) are arranged in the liquid-cooled bottom plate (100). The liquid-cooled channels (130) are arranged adjacent to the bosses (110), and the length direction of the liquid-cooled channels (130) is parallel to the length direction of the bosses (110).

3. The liquid cooling plate structure according to claim 2, wherein, The liquid-cooled channels (130) are arranged directly below the bosses (110).

4. The liquid cooling plate structure according to claim 3, wherein, The upper opening surface of the liquid-cooled channel (130) is attached to the bottom surface of the boss (110).

5. The liquid cooling plate structure according to claim 4, characterized in that, A liquid-cooled groove (111) is arranged at one end of the boss (110) connected to the liquid-cooled bottom plate (100), and the liquid-cooled groove (111) is communicated with the liquid-cooled channel (130).

6. The liquid cooling plate structure according to any one of claims 1 to 5, characterized in that: One side surface of the boss (110) connected to the battery cell (210) is arranged in a wavy or serrated shape.

7. The liquid cooling plate structure according to any one of claims 1 to 5, characterized in that, The height of the boss (110) is set to 1-2 mm.

8. A battery box, characterized in that, It includes a frame structure (400) and the liquid-cooled plate structure according to any one of claims 1 to 7. The frame structure (400) includes side plates connected to the liquid-cooled bottom plate (100), and the liquid-cooled plate and the side plates enclose a placement cavity (420) for placing the battery module (200).

9. The battery box according to claim 8, characterized in that, The frame structure (400) includes side frames (410) arranged on both sides of the liquid-cooled bottom plate (100). Liquid-cooled channels (411) are arranged on the side frames (410), and a diversion port (412) for communicating the liquid-cooled channels (411) with the liquid-cooled channels (130) in the liquid-cooled bottom plate (100) is arranged on one side of the side frames (410) connected to the liquid-cooled bottom plate (100).

10. A battery pack (500), characterized in that: It includes a battery module (200) and the battery box according to claim 8 or 9. The battery module (200) is placed in the placement cavity (420), and the battery module (200) is connected to the liquid-cooled bottom plate (100) through the thermally conductive structural adhesive (300).

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