Cooling assembly and battery pack

Abstract

The utility model discloses a cooling assembly which comprises two cooling plates which are oppositely arranged, the two cooling plates are the first cooling plate and the second cooling plate respectively, the first cooling plate and the second cooling plate are arranged in a spaced mode to form a space used for containing a module, and partition structures are arranged on the cooling plates. The interior of the first cold plate is separated by the separation structure to form a first flow channel, the interior of the second cold plate is separated by the separation structure to form a second flow channel, and the flowing directions of cooling liquid in the first flow channel and the second flow channel are different. According to the utility model, the problem of large temperature difference of the existing battery module is solved, and the temperature uniformity and the safety of the battery module are improved. The utility model further discloses a battery pack.

Description

Technical Field

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

[0002] As market requirements increase, new energy vehicles are carrying more and more electricity, with shorter recharging times and higher fast charging rates. High-rate fast charging will increase the temperature rise of the battery, so the thermal management of power batteries is particularly important.

[0003] In the prior art, the coolant flows in the same direction on the upper and lower double-layer cold plates, both entering from one side and exiting from the other. In this solution, the coolant temperature at the water inlet is the lowest, which can take away a lot of heat, while the coolant temperature near the water outlet has risen, and the ability to absorb heat has decreased, resulting in a higher overall temperature near the water outlet, which in turn leads to a large temperature difference between the battery cells. Utility Model Content

[0004] In order to overcome the shortcomings and deficiencies in the prior art, the purpose of the utility model is to provide a cooling assembly and a battery pack to solve the problem of large temperature differences in existing battery modules and improve the temperature uniformity and safety of the battery modules.

[0005] The purpose of the utility model is achieved through the following technical solutions:

[0006] A cooling assembly includes two cooling plates arranged opposite to each other, the two cooling plates are respectively a first cold plate and a second cold plate, the first cold plate and the second cold plate are arranged at intervals to form a space for accommodating a module, a partition structure is provided on the cooling plate, the partition structure divides the first cold plate to form a first flow channel, the partition structure divides the second cold plate to form a second flow channel, and the flow directions of the coolant in the first flow channel and the second flow channel are different.

[0007] In one embodiment, the coolant in the first flow channel and the coolant in the second flow channel flow in opposite directions.

[0008] In one embodiment, the first cold plate includes a first inlet and a first outlet communicating with the first flow channel, the second cold plate includes a second inlet and a second outlet communicating with the second flow channel, the first inlet and the second inlet are arranged on different sides, and the first outlet and the second outlet are arranged on different sides.

[0009] In one embodiment, a branch port is formed on the first cold plate near the first inlet, and the branch port is connected to the second inlet through a first infusion tube.

[0010] In one embodiment, a reflux port is provided on the first cold plate near the first outlet, and the reflux port is connected to the second outlet via a second infusion tube.

[0011] In one embodiment, the cooling plate has a first direction and a second direction perpendicular to each other, and the partition structures are arranged at intervals along the second direction and extend along the first direction.

[0012] In one embodiment, the separation structure is a separation bar or a separation groove.

[0013] In one embodiment, when the partition structure is a partition strip, the partition strip includes a first partition strip, the first partition strip is arranged inside the cooling plate, one end of the first partition strip is connected to the inner wall of the cooling plate, and the other end of the first partition strip is arranged away from the inner wall of the cooling plate to form a connecting flow channel for the circulation of coolant.

[0014] In one embodiment, the partition strip further includes a second partition strip, and the second partition strip is alternately distributed with the first partition strip in the cooling plate, and the connecting flow channel is formed between at least one end of the second partition strip and the inner wall of the cooling plate.

[0015] In one embodiment, when the separation structure is a separation groove, the surface of the cooling plate is provided with the separation groove, and the separation groove has and only has one end that is open along the first direction.

[0016] The utility model also provides a battery pack, comprising a module and the cooling assembly as described above, wherein the module is sandwiched between the first cold plate and the second cold plate.

[0017] The beneficial effect of the utility model is that the flow direction of the coolant in the second cold plate is different from that in the first cold plate, which effectively solves the problem that the coolant in the two original cold plates has the same flow direction, resulting in a relatively high temperature on one side of the water outlet, so that the overall cooling of the cooling plate is more uniform, the temperature equalization effect is improved, and the problem of large temperature difference between battery cells is avoided. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the utility model and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without paying creative work.

[0019] Figure 1 It is prior art;

[0020] Figure 2It is a structural schematic diagram of a cooling assembly of an embodiment of the utility model;

[0021] Figure 3 yes Figure 2 A schematic diagram of a structure in which a flow channel is arranged in a dividing groove in a first cold plate;

[0022] Figure 4 It is a structural schematic diagram of a flow channel arranged on a partition bar in a first cold plate of another embodiment of the utility model;

[0023] Figure 5 It is a structural schematic diagram of a flow channel arranged on a partition bar in a first cold plate of another embodiment of the utility model.

[0024] Figure 6 It is a structural schematic diagram of a flow channel arranged on a partition bar in a first cold plate of another embodiment of the utility model;

[0025] Figure 7 It is a structural schematic diagram of a flow channel arranged in a dividing groove and a dividing strip in a first cold plate of another embodiment of the utility model.

[0026] In the figure: 1. cooling plate; 11. first cold plate; 111. first flow channel; 112. first inlet; 113. first outlet; 114. branch port; 115. reflux port; 116. liquid inlet pipe; 117. liquid outlet pipe; 12. second cold plate; 121. second flow channel; 122. second inlet; 123. second outlet; 13. partition structure; 13A. partition groove; 13B. partition bar; 131. first partition bar; 132. second partition bar; 14. first infusion pipe; 15. second infusion pipe; 16. connecting flow channel. DETAILED DESCRIPTION

[0027] The following will describe in detail a specific embodiment of the utility model in conjunction with the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the utility model, not all of the embodiments. Based on the description of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0028] In the description of the present utility model, unless otherwise clearly specified and limited, the terms "set", "install", "connection" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms can be understood according to specific circumstances.

[0029] The directions or positional relationships indicated by terms such as "upper", "lower", "left", "right", "front", "back", "top", "bottom", "inside" and "outside" are based on the directions or positional relationships shown in the accompanying drawings, or are the directions or positional relationships in which the utility model product is usually placed when in use. They are only for the convenience of description and simplified 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 should not be understood as a limitation on the utility model.

[0030] The terms "first", "second", "third" and the like are merely used to distinguish elements of similar nature, and do not indicate or imply relative importance or a particular order.

[0031] The terms "comprises," "comprising," or any other variations thereof, are intended to cover a non-exclusive inclusion of the elements listed and may also include additional elements not expressly listed.

[0032] The utility model provides a cooling component, such as Figure 2 As shown, it includes two cooling plates 1 arranged opposite to each other, the two cooling plates 1 are respectively a first cold plate 11 and a second cold plate 12, the first cold plate 11 and the second cold plate 12 are arranged at intervals to form a space for accommodating a module (not shown), and a partition structure 13 is provided on the cooling plate 1, the partition structure 13 divides the interior of the first cold plate 11 to form a first flow channel 111, and the partition structure 13 divides the interior of the second cold plate 12 to form a second flow channel 121, and the flow directions of the coolant in the first flow channel 111 and the second flow channel 121 are different. In this embodiment, the flow directions of the coolant in the second cold plate 12 and the first cold plate 11 are different, which effectively solves the problem of Figure 1 The original coolant flow directions of the two cooling plates 1 are the same (both flow from the inlet pipe 116 to the outlet pipe 117), which leads to the problem of relatively high temperature on one side of the outlet pipe 117. This balances the problem of uneven heat distribution caused by the cooling liquid absorbing heat on the cooling plate 1, making the overall cooling of the cooling plate 1 more uniform, improving the temperature equalization effect, and avoiding the problem of large temperature differences between battery cells. Furthermore, in this embodiment, the inner cavity of the cooling plate 1 can be evenly divided by the partition structure 13 to form a uniform flow channel, and the coolant flow rate is stable, so that the coolant in the first flow channel 111 and the second flow channel 121 can evenly cool the module, thereby improving the temperature uniformity and safety of the battery module.

[0033] As an implementation method, Figure 2 As shown, the flow directions of the coolant in the first flow channel 111 and the second flow channel 121 are opposite, which can better balance the problem of uneven heat distribution of the cooling plate 1 caused by the coolant absorbing heat, making the overall cooling of the cooling plate 1 more uniform and improving the temperature equalization effect.

[0034] As an implementation method, Figure 2 and Figure 3 As shown, the first cold plate 11 includes a first inlet 112 and a first outlet 113 connected to the first flow channel 111, and the second cold plate 12 includes a second inlet 122 and a second outlet 123 connected to the second flow channel 121. The first inlet 112 and the second inlet 122 are arranged on different sides, and the first outlet 113 and the second outlet 123 are arranged on different sides, so that the first cold plate 11 and the second cold plate 12 have different flow directions, and the temperature equalization effect is good. Further, the first inlet 112 and the second outlet 123 are arranged on the same side, and the first outlet 113 and the second inlet 122 are arranged on the same side, so that the first cold plate 11 and the second cold plate 12 have opposite flow directions, and the temperature equalization effect is good.

[0035] As an implementation method, Figure 2 As shown, a liquid inlet pipe 116 is installed at the first inlet 112 , and the coolant enters the cooling assembly through the liquid inlet pipe 116 .

[0036] As an implementation method, Figure 2 As shown, a branch port 114 is provided on the first cold plate 11 near the first inlet 112, and the branch port 114 is connected to the second inlet 122 through the first liquid infusion pipe 14. After the coolant enters the first cold plate 11 through the liquid inlet pipe 116, it enters the second cold plate 12 through the branch port 114 and the first liquid infusion pipe 14. The first inlet 112 of the first cold plate 11 and the second inlet 122 of the second cold plate 12 are arranged on different sides, which improves the temperature equalization effect. Of course, the second inlet 122 can also be directly connected through another liquid inlet pipe, and the coolant can be input to the second cold plate 12 through the other liquid inlet pipe.

[0037] As an implementation method, Figure 2 As shown, a liquid outlet pipe 117 is installed at the first outlet 113 , and the coolant flows out of the cooling component through the liquid outlet pipe 117 .

[0038] As an implementation method, Figure 2 As shown, a reflux port 115 is provided on the first cold plate 11 near the first outlet 113, and the reflux port 115 is connected to the second outlet 123 through the second liquid infusion pipe 15. When discharging liquid, the coolant of the first cold plate 11 is directly discharged through the first outlet 113, and the coolant of the second cold plate 12 returns to the first cold plate 11 through the second outlet 123, the second liquid infusion pipe 15 and the reflux port 115, and then is discharged from the first outlet 113 of the first cold plate 11. Of course, the second outlet 123 can also be directly connected through another liquid outlet pipe, and the coolant of the second cold plate 12 can be discharged through the other liquid outlet pipe.

[0039] The upper and lower positions of the first cold plate 11 and the second cold plate 12 are not limited. Figure 2As shown, the first cold plate 11 is located below the cooling assembly and can be used as the lower cold plate, and the second cold plate 12 can be used as the upper cold plate; of course, the first cold plate 11 can also be located above the cooling assembly and can be used as the upper cold plate, and the second cold plate 12 can be used as the lower cold plate, and the liquid inlet pipe 116 and the liquid outlet pipe 117 are located on the upper first cold plate 11 (i.e., the upper cold plate), which is not limited here.

[0040] As an implementation method, Figure 2 As shown, the first inlet 112 and the second inlet 122 are located at the same end of the cooling component, and / or the first outlet 113 and the second outlet 123 are located at the same end of the cooling component, so that the first inlet 112 and the second inlet 122 are close to each other, and the first outlet 113 and the second outlet 123 are close to each other. When the first cold plate 11 and the second cold plate 12 are connected by the first infusion tube 14 and the second infusion tube 15, the required tube length is short, which reduces the cost expenditure, and the coolant can be quickly injected into the second cold plate 12, and can also be quickly discharged from the second cold plate 12, avoiding the coolant flowing through the longer first infusion tube 14 and the second infusion tube 15, thereby improving the cooling efficiency.

[0041] As an implementation method, Figure 2 and Figure 7 As shown, the cooling plate 1 has a first direction X and a second direction Y that are perpendicular to each other. The partition structures 13 are arranged at intervals along the second direction Y and extend along the first direction X.

[0042] As an implementation manner, the partition structure 13 is a partition bar 13B or a partition groove 13A.

[0043] As an implementation method, Figure 4 As shown, when the partition structure 13 is a partition bar 13B, the partition bar 13B includes a first partition bar 131, and the first partition bar 131 is arranged inside the cooling plate 1, and one end of the first partition bar 131 (an end close to the first inlet 112 or the second inlet 122) is connected to the inner wall of the cooling plate 1, and the other end of the first partition bar 131 is arranged away from the inner wall of the cooling plate 1 to form a connecting flow channel 16 for the circulation of coolant, so that a U-shaped flow channel is formed in the cooling plate 1.

[0044] As an implementation method, Figure 5 and Figure 6 As shown, the partition bar 13B further includes a second partition bar 132, which is alternately spaced with the first partition bar 131 in the cooling plate 1, and a connecting flow channel 16 is formed between at least one end of the second partition bar 132 and the inner wall of the cooling plate 1. Specifically, as Figure 5 As shown, both ends of the second dividing strip 132 form a communicating channel 16 with the inner wall of the cooling plate 1; Figure 6As shown, one end of the second partition bar 132 forms a connecting flow channel 16 with the inner wall of the cooling plate 1. By arranging multiple partition structures 13 in the cooling plate 1, the flow distance of the coolant in the cooling plate 1 can be extended, so that the coolant can fully exchange heat with the module. Figures 3 to 7 The setting method of the partition structure 13 in the first cold plate 11 is described. Since the setting method of the flow channel of the partition structure 13 in the second cold plate 12 is the same as that of the first cold plate 11, no separate figure description is provided here. Among them, the first cold plate 11 and the second cold plate 12 can be set as cooling plates 1 of the same size, so that they can be produced by the same mold, saving production costs, and then the openings (such as the branch port 114 and the return port 115) are set according to actual needs.

[0045] As an implementation method, Figure 2 and Figure 3 As shown, when the partition structure 13 is a partition groove 13A, the partition groove 13A is provided on the surface of the cooling plate 1, and the partition groove 13A has only one end that is open along the first direction X, and the open end of the cooling plate 1 is arranged close to the first inlet 112 or the second inlet 122, and the other end is connected to form a connecting flow channel 16. Specifically, Figure 3 As shown, the surface of the cooling plate 1 is provided with a separation groove 13A, which is convenient for processing and forming, and the interior of the cooling plate 1 is separated to form a flow channel; or Figure 4 As shown, by setting the partition bar 13B inside the cooling plate 1, the inside of the cooling plate 1 is divided to form a flow channel. In one cooling plate 1, the inner cavity of the cooling plate 1 can be divided only by the partition groove 13A (such as Figure 3 ), or the inner cavity of the cooling plate 1 is separated only by the partition bar 13B (as shown in Figures 4 to 6 As shown), or the inner cavity of the cooling plate 1 is separated by the separation groove 13A and the separation bar 13B (as shown Figure 7 As shown), that is, the dividing groove 13A can replace the first dividing strip 131 and be used alternately with the second dividing strip 132.

[0046] The utility model also provides a battery pack, comprising a module and a cooling assembly as described above, wherein the module is sandwiched between a first cold plate 11 and a second cold plate 12. Furthermore, the first cold plate 11 and the second cold plate 12 completely cover two surfaces of the module, so that the two surfaces of the module can fully contact the first cold plate 11 and the second cold plate 12 respectively, thereby preventing part of the module from not contacting the cooling plate 1, and improving the cooling effect.

[0047] The flow directions of the coolant in the second cold plate 12 and the first cold plate 11 of the utility model are different, which effectively solves the problem that the flow directions of the coolant in the two cooling plates 1 are the same, resulting in a relatively high temperature on one side of the liquid outlet pipe 117, and balances the problem of uneven heat distribution caused by the coolant absorbing heat in the cooling plate 1, so that the overall cooling of the cooling plate 1 is more uniform, the temperature equalization effect is improved, and the problem of large temperature difference between battery cells is avoided.

[0048] The above description is only a preferred embodiment of the present invention, and does not limit the present invention in any form. Although the present invention has been disclosed as a preferred embodiment as above, it is not used to limit the present invention. Any technician familiar with the profession can make some changes or modifications to the technical contents disclosed above without departing from the scope of the technical solution of the present invention, which are equivalent embodiments of equivalent changes. However, any simple modification, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention without departing from the content of the technical solution of the present invention are still within the protection scope of the technical solution of the present invention.

Claims

1. A cooling assembly, characterized in that: The invention comprises two cooling plates (1) arranged opposite to each other, the two cooling plates (1) being respectively a first cold plate (11) and a second cold plate (12); the first cold plate (11) and the second cold plate (12) being arranged at an interval to form a space for accommodating a module; a partition structure (13) is provided on the cooling plate (1); the partition structure (13) partitions the first cold plate (11) to form a first flow channel (111); the partition structure (13) partitions the second cold plate (12) to form a second flow channel (121); and the flow directions of the coolants in the first flow channel (111) and the second flow channel (121) are different.

2. The cooling assembly according to claim 1, characterized in that The flow directions of the coolant in the first flow channel (111) and the second flow channel (121) are opposite.

3. The cooling assembly according to claim 1, characterized in that The first cold plate (11) comprises a first inlet (112) and a first outlet (113) connected to the first flow channel (111), and the second cold plate (12) comprises a second inlet (122) and a second outlet (123) connected to the second flow channel (121), the first inlet (112) and the second inlet (122) are arranged on different sides, and the first outlet (113) and the second outlet (123) are arranged on different sides.

4. The cooling assembly according to claim 3, characterized in that A branch port (114) is provided on the first cold plate (11) near the first inlet (112), and the branch port (114) is connected to the second inlet (122) via a first infusion tube (14).

5. The cooling assembly according to claim 3, characterized in that A reflux port (115) is provided on the first cold plate (11) near the first outlet (113), and the reflux port (115) is connected to the second outlet (123) via a second infusion tube (15).

6. The cooling assembly according to claim 1, characterized in that The cooling plate (1) has a first direction (X) and a second direction (Y) that are perpendicular to each other, and the partition structures (13) are arranged at intervals along the second direction (Y) and extend along the first direction (X).

7. The cooling assembly according to claim 6, characterized in that The separation structure (13) is a separation bar (13B) or a separation groove (13A).

8. The cooling assembly according to claim 7, characterized in that When the partition structure (13) is a partition bar (13B), the partition bar (13B) includes a first partition bar (131), the first partition bar (131) is arranged inside the cooling plate (1), one end of the first partition bar (131) is connected to the inner wall of the cooling plate (1), and the other end of the first partition bar (131) is arranged away from the inner wall of the cooling plate (1) to form a connecting flow channel (16) for the circulation of cooling liquid.

9. The cooling assembly according to claim 8, characterized in that The partition strip (13B) further includes a second partition strip (132), wherein the second partition strip (132) is alternately spaced with the first partition strip (131) in the cooling plate (1), and the connecting flow channel (16) is formed between at least one end of the second partition strip (132) and the inner wall of the cooling plate (1).

10. The cooling assembly according to claim 7, characterized in that When the separation structure is a separation groove (13A), the surface of the cooling plate (1) is provided with the separation groove (13A), and the separation groove (13A) has one and only one end that is open along the first direction (X).

11. A battery pack, characterized in that: It comprises a module and a cooling assembly according to any one of claims 1 to 10, wherein the module is sandwiched between the first cold plate (11) and the second cold plate (12).

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