Thermal management device for battery pack and battery pack

Abstract

The utility model relates to the technical field of energy storage equipment, and particularly discloses a heat management device for a battery pack and the battery pack. The heat management device comprises a box body with a containing cavity, a first flow channel, a first liquid passing opening communicated with the first flow channel, a second flow channel, a second liquid passing opening communicated with the second flow channel and a plurality of heat exchange plates which are arranged in the containing cavity and provided with cavities, and the cavities of the heat exchange plates are communicated with the first flow channel and the second flow channel. The box body comprises a first side wall and a second side wall which are located on the two sides of the containing cavity in the first direction respectively, the multiple heat exchange plates are connected to the first side wall and the second side wall and arranged at intervals in the second direction, and openings communicating with cavities of the heat exchange plates and the containing cavity are formed in the heat exchange plates. According to the heat management device for the battery pack and the battery pack provided by the utility model, the heat exchange liquid can quickly and effectively cover the battery cell, and the plurality of heat exchange plates connected with the first side wall and the second side wall in the heat management device can also limit the position of the battery cell and enhance the strength of the box body.

Description

Technical Field

[0001] The utility model relates to the technical field of energy storage equipment, and in particular to a thermal management device for a battery pack and a battery pack. Background Art

[0002] In order to manage the heat of the battery cells in the battery pack, air cooling or liquid cooling is usually used. The battery pack using the air cooling solution has a simple structure, but the thermal management efficiency is limited. The battery pack using the liquid cooling solution needs to be equipped with cold plates and other components. The structure is relatively complex and is greatly restricted in application. At present, there is also an immersion liquid cooling solution, which immerses the battery cell in the heat exchange liquid so that the surface of the battery cell can be in full contact with the heat exchange liquid. It has the advantages of high heat exchange efficiency, good temperature uniformity, fewer components required, high space utilization, low safety risks, and strong environmental adaptability.

[0003] When the existing battery pack adopts the immersion liquid cooling solution, the heat exchange liquid flows from the bottom to the top of the battery cell to immerse the battery cell. The flow resistance of the heat exchange liquid is large, the flow of the heat exchange liquid around each battery cell is difficult to control, and it is impossible to accurately cover all the battery cells. In actual use, the temperature difference between different positions in the battery pack is large. In addition, in the existing battery pack, structures such as brackets and end plates are required to fix the position of the battery cell, which increases the complexity of the battery pack structure. Utility Model Content

[0004] The utility model aims to provide a thermal management device for a battery pack, which can cover the battery core with a heat exchange fluid and limit the electrical properties, and a battery pack comprising the same.

[0005] To achieve the above-mentioned objectives, the utility model proposes a thermal management device for a battery pack, comprising a box body with a accommodating cavity, a first flow channel, a first liquid port connected to the first flow channel, a second flow channel, a second liquid port connected to the second flow channel, and a plurality of heat exchange plates with cavities arranged in the accommodating cavity, the heat exchange plates extending along a first direction and their cavities connecting the first flow channel and the second flow channel, the box body comprising a first side wall and a second side wall respectively located on both sides of the accommodating cavity in the first direction, a plurality of the heat exchange plates are connected to the first side wall and the second side wall, and are arranged at intervals along a second direction perpendicular to the first direction, and a plurality of openings are provided on the heat exchange plates connecting their cavities and the accommodating cavity.

[0006] As a further improvement of the present utility model, the first flow channel is formed in the first side wall, the first side wall includes a first wall plate, a first flow channel plate connected to the first wall plate close to the accommodating cavity, and the first wall plate and the first flow channel plate are arranged to form the first flow channel; the second flow channel is formed in the second side wall, the second side wall includes a second wall plate, a second flow channel plate connected to the second wall plate close to the accommodating cavity, and the second wall plate and the second flow channel plate are arranged to form the second flow channel; the heat exchange plate is connected to the first flow channel plate and the second flow channel plate.

[0007] As a further improvement of the present invention, a plurality of the openings are opened on the upper end surface and / or the lower end surface of the heat exchange plate.

[0008] As a further improvement of the utility model, the plurality of heat exchange plates are arranged into a plurality of layers along an up-and-down direction, wherein the up-and-down direction is perpendicular to the first direction and the second direction, and there is a gap between two adjacent layers of heat exchange plates.

[0009] As a further improvement of the present invention, the number of the first flow channels and the second flow channels is the same as the number of layers of the heat exchange plates, and the cavities of the heat exchange plates in each layer are connected to one first flow channel and one second flow channel respectively.

[0010] As a further improvement of the utility model, the box body also includes a third side wall and a fourth side wall respectively located on both sides of the accommodating cavity in the second direction, and a third flow channel, a plurality of fourth flow channels respectively connected to the third flow channel and a plurality of first flow channels, a fifth flow channel, and a plurality of sixth flow channels respectively connected to the fifth flow channel and a plurality of second flow channels are formed in the third side wall, the first liquid opening and the second liquid opening are opened on the third side wall and are respectively connected to the third flow channel and the fifth flow channel, and a third liquid opening connected to the accommodating cavity is opened on the fourth side wall.

[0011] As a further improvement of the present utility model, the heat exchange plate includes a first plate body and a second plate body respectively arranged on both sides of the first direction, the cavity includes a first cavity formed in the first plate body and a second cavity formed in the second plate body, the heat exchange plate also includes a partition structure for isolating the connection between the first cavity and the second cavity, the opening includes a first opening located in the first plate body and connecting the first cavity and the accommodating cavity, and a second opening located in the second plate body and connecting the second cavity and the accommodating cavity, the first plate body is connected to the first side wall, the first cavity is connected to the first flow channel, the second plate body is connected to the second side wall, and the second cavity is connected to the second flow channel.

[0012] As a further improvement of the utility model, the box body also includes a third side wall and a fourth side wall respectively located on both sides of the accommodating cavity in the second direction, a third flow channel and a plurality of fourth flow channels respectively connected to the third flow channel and a plurality of first flow channels are formed in the third side wall, and the first liquid opening is opened on the third side wall and connected to the third flow channel; a fifth flow channel and a plurality of sixth flow channels respectively connected to the fifth flow channel and a plurality of second flow channels are formed in the fourth side wall, and the second liquid opening is opened on the fourth side wall and connected to the fifth flow channel.

[0013] As a further improvement of the present invention, the box body also includes a bottom wall located below the accommodating cavity, and a plurality of grooves extending along the second direction formed from a side of the bottom wall close to the accommodating cavity, and the plurality of grooves are arranged at intervals along the first direction.

[0014] The utility model also provides a battery including the above-mentioned thermal management device, a plurality of battery cells arranged in the accommodating cavity, the plurality of battery cells are arranged in a plurality of rows along the second direction, and the heat exchange plate is located between two adjacent rows of battery cells.

[0015] Beneficial effects of the utility model:

[0016] The thermal management device for a battery pack and the battery pack provided by the utility model can enable the heat exchange liquid to quickly and effectively cover the battery cells, and the plurality of heat exchange plates connected to the first side wall and the second side wall in the thermal management device can also limit the position of the battery cells and enhance the strength of the box body. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 A schematic diagram of the exploded structure of a battery pack provided in the first embodiment of the utility model;

[0018] Figure 2 for Figure 1 Schematic diagram of the structure of the battery pack after removing the upper cover and some cells, in which the box part is displayed transparently;

[0019] Figure 3 for Figure 2 The enlarged schematic diagram of point A in the middle;

[0020] Figure 4 A schematic diagram of the structure of the thermal management device provided by the first embodiment of the utility model at a certain viewing angle;

[0021] Figure 5 for Figure 4 A schematic diagram of the structure of the thermal management device in another perspective after removing the heat exchange plate;

[0022] Figure 6 A schematic side view of the structure of several battery cells and heat exchange plates in a battery pack provided in the first embodiment of the utility model;

[0023] Figure 7 for Figure 6 The enlarged schematic diagram of point B in the middle;

[0024] Figure 8 A schematic diagram of the structure of a battery pack provided by the second embodiment of the utility model after removing the upper cover and some of the battery cells from one viewing angle, wherein the box body is partially transparent;

[0025] Fig. 9 for Figure 8 The enlarged schematic diagram of point C in the middle;

[0026] Fig.10 This is a schematic structural diagram of the battery pack provided in the second embodiment of the utility model from another perspective after removing the upper cover, wherein the box body is partially displayed transparently. DETAILED DESCRIPTION

[0027] The present invention will be described in detail below in conjunction with the embodiments shown in the accompanying drawings. However, the embodiments do not limit the present invention, and any changes in mechanism, method, or function made by a person skilled in the art based on the embodiments are all within the protection scope of the present invention.

[0028] The terms used herein, such as "upper", "lower", "left", "right", "front", "back", etc., which indicate relative spatial positions, are used for the purpose of convenience to describe the relationship between one feature and another feature as shown in the accompanying drawings. It is understood that, depending on the placement of the product, the terms of relative spatial positions may be intended to include different orientations other than those shown in the drawings, and should not be construed as limitations on the claims. In addition, the descriptor "horizontal" used herein is not completely equivalent to being perpendicular to the direction of gravity, and a certain angle of inclination is allowed.

[0029] Figure 1-7 The battery pack 100 of the first embodiment of the utility model is shown, and the battery pack 100 includes a plurality of battery cells 20 and a thermal management device for thermally managing the plurality of battery cells 20. In this article, a plurality should be understood as greater than or equal to 2. For the convenience of explanation, Figure 1 In the coordinate system in the lower right corner, the X-axis represents the first direction of the battery pack 100 , the Y-axis represents the second direction of the battery pack 100 , and the Z-axis represents the up-down direction of the battery pack 100 .

[0030] The thermal management device includes a housing 1 having a housing cavity 11, a first flow channel 2, a first liquid port 21 connected to the first flow channel 2, a second flow channel 3, a second liquid port 31 connected to the second flow channel 3, and a plurality of heat exchange plates 4 arranged in the housing cavity 11. The heat exchange plate 4 is hollow and has a cavity 41 inside. The heat exchange plate 4 is provided with an opening 42 connecting its cavity 41 and the housing cavity 11. The heat exchange plate 4 extends along a first direction, and its cavity 41 connects the first flow channel 2 and the second flow channel 3. The housing 1 includes a first side wall 12 and a second side wall 13 respectively located on both sides of the housing cavity 11 in the first direction. The plurality of heat exchange plates 4 are connected to the first side wall 12 and the second side wall 13, and are arranged at intervals along a second direction perpendicular to the first direction. The plurality of battery cells 20 are arranged in a plurality of rows along the second direction, and the heat exchange plates 4 are located between two adjacent rows of battery cells 20.

[0031] In this embodiment, when thermal management is performed on the battery cell 20, the heat exchange liquid can flow into the first flow channel 2 and the second flow channel 3 through the first liquid port 21 and the second liquid port 31 respectively, and then flow into the inner cavity of several heat exchange plates 4 from the first flow channel 2 and the second flow channel 3. After that, the heat exchange liquid flows into the accommodating cavity 11 from the opening 42 on the heat exchange plate 4, so that several battery cells 20 are immersed in the heat exchange liquid. Several battery cells 20 are immersed in the heat exchange liquid and exchange heat with the heat exchange liquid. The temperature of the heat exchange liquid can be set according to actual needs. It can be used as a coolant to cool the battery cell 20, or as a heating liquid to heat the battery cell 20. In the following, the heat exchange liquid is used as a coolant for explanation. It can be imagined that the heat exchange liquid in the accommodating cavity 11 can also be pumped out from the first liquid port 21 and the second liquid port 31.

[0032] The heat exchange plate 4 is connected to the first side wall 12 and the second side wall 13, and is fixed relative to the box body 1. For the battery cells 20 arranged in several rows, the heat exchange plate 4 is located between two adjacent rows of battery cells 20, and two adjacent heat exchange plates 4 clamp a row of battery cells 20 from both sides. Therefore, the above-mentioned several heat exchange plates 4 also play a role in limiting the positions of several battery cells 20.

[0033] The first flow channel 2 is formed in the first side wall 12, and the first side wall 12 includes a first wall plate 121, a first flow channel plate 122 connected to the first wall plate 121 near the accommodating chamber 11, the first flow channel plate 122 extends along the second direction, and its cross section is roughly C-shaped, the first wall plate 121 and the first flow channel plate 122 are arranged to form the first flow channel 2; similarly, the second flow channel 3 is formed in the second side wall 13, the second side wall 13 includes a second wall plate 131, a second flow channel plate 132 connected to the second wall plate 131 near the accommodating chamber 11, the first flow channel plate 122 extends along the second direction, and its cross section is roughly C-shaped, the second wall plate 131 and the second flow channel plate 132 are arranged to form the second flow channel 3. In this way, the first flow channel 2 and the second flow channel 3 are integrated with the box body 1, making the structure of the thermal management device simpler.

[0034] In other embodiments, the first flow channel 2 and the second flow channel 3 can also be provided separately, that is, the thermal management device includes a first pipe and a second pipe located in the accommodating cavity 11, the first flow channel 2 is formed in the first pipe, and the second flow channel 3 is formed in the second pipe.

[0035] In this embodiment, a plurality of the openings 42 are provided on the upper end surface and / or the lower end surface of the heat exchange plate 4. A plurality of openings 42 are arranged along the first direction on the upper end surface and / or the lower end surface of the heat exchange plate 4. The heat exchange fluid can flow from the cavity 41 of the heat exchange plate 4 into the gap between two adjacent rows of battery cells 20 in the up-down direction through the openings 42, or flow from the gap between two adjacent rows of battery cells 20 into the cavity 41 of the heat exchange plate 4. The plurality of openings 42 provided on the heat exchange plate 4 can allow the heat exchange fluid to flow evenly into the gap between two adjacent rows of battery cells 20, so that the temperature on different battery cells 20 remains uniform. The size, number and arrangement interval of the openings 42 on the heat exchange plate 4 are set according to the actual cooling requirements so that the heat exchange fluid can evenly and effectively cool down the plurality of battery cells 20, and are not limited here.

[0036] Furthermore, the plurality of heat exchange plates 4 are arranged into a plurality of layers along the up-down direction, wherein the up-down direction is perpendicular to the first direction and the second direction, and there is a gap between two adjacent layers of heat exchange plates 4, so that there is a channel 21 for the flow of heat exchange fluid between the two adjacent layers of heat exchange plates 4, and the heat exchange fluid flows in the channel 21 to take away the heat from the battery cell 20.

[0037] Furthermore, the upper end surfaces of the several heat exchange plates 4 in the uppermost layer are lower than the upper end surfaces of the battery cells 20, and the lower end surfaces of the several heat exchange plates 4 in the lowermost layer are higher than the lower end surfaces of the battery cells 20. In this way, channels 21 for the flow of heat exchange fluid are formed above the several heat exchange plates 4 in the uppermost layer and below the several heat exchange plates 4 in the lowermost layer.

[0038] The size of the battery cell 20 in the first direction is larger than its size in the second direction. In this way, the heat exchange plate 4 is arranged between the "large surfaces" of the two battery cells 20, and the heat exchange fluid entering and exiting the cavity 41 of the heat exchange plate 4 from the opening 42 also flows through the "large surface" of the battery cell 20. The heat exchange fluid can fully take away the heat from the battery cell 20.

[0039] The number of the first flow channels 2 and the second flow channels 3 is the same as the number of layers of the heat exchange plates 4 , so that the cavities 41 of the heat exchange plates 4 in each layer are connected to one first flow channel 2 and one second flow channel 3 .

[0040] The box body 1 also includes a third side wall 14 and a fourth side wall 15 which are respectively located on both sides of the accommodating cavity 11 in the second direction. A third flow channel 5, a plurality of fourth flow channels 6 respectively connecting the third flow channel 5 and a plurality of first flow channels 2, a fifth flow channel 7, and a plurality of sixth flow channels 8 respectively connecting the fifth flow channel 7 and a plurality of second flow channels 3 are formed in the third side wall 14. The first liquid through port 21 and the second liquid through port 31 are opened on the third side wall 14 and are respectively connected to the third flow channel 5 and the fifth flow channel 7. The fourth side wall 15 is provided with a third liquid through port 16 which is connected to the accommodating cavity 11.

[0041] With the above arrangement, the heat exchange liquid can flow into the plurality of first flow channels 2 through the first liquid passage 21, then flow into the cavities 41 of the plurality of heat exchange plates 4 from the plurality of first flow channels 2, and finally flow into the accommodation chamber 11 from the openings 42 of the plurality of heat exchange plates 4; similarly, the heat exchange liquid can flow into the plurality of second flow channels 3 through the second liquid passage 31, then flow into the cavities 41 of the plurality of heat exchange plates 4 from the plurality of first flow channels 2, and finally flow into the accommodation chamber 11 from the openings 42 of the plurality of heat exchange plates 4, and the third liquid passage 16 is used to allow the heat exchange liquid in the accommodation chamber 11 to flow out of the accommodation chamber 11, that is, the heat exchange liquid flows into the accommodation chamber 11 through the first liquid passage 21 and the second liquid passage 31, and flows out of the accommodation chamber 11 through the third liquid passage 16. It is conceivable that the heat exchange liquid can also enter the accommodation chamber 11 from the third liquid passage 16, and flow out of the accommodation chamber 11 from the first liquid passage 21 and the second liquid passage 31. The third liquid passage 16 can also be disposed on the first side wall 12 , the second side wall 13 , the third side wall 14 or even the bottom wall 17 .

[0042] The third side wall 14 includes a third wall plate 141, a third flow channel plate 142 connected to the third wall plate 141 near the accommodating chamber 11, and a plurality of fourth flow channel plates 143. The cross-sections of the third flow channel plate 142 and the plurality of fourth flow channel plates 143 are roughly C-shaped. The third wall plate 141 and the third flow channel plate 142 are arranged to form a third flow channel 5. The plurality of fourth flow channel plates 143 and the third wall plate 141 are arranged to form a plurality of fourth flow channels 6. The third side wall also includes a fifth flow channel plate 152 and a plurality of sixth flow channel plates 153 connected to the third wall plate 143 near the accommodating chamber 11. The cross-sections of the fifth flow channel plate 152 and the plurality of sixth flow channel plates 153 are roughly C-shaped. The third wall plate 141 and the fifth flow channel plate 152 are arranged to form a fifth flow channel 7. The plurality of sixth flow channel plates 153 and the third wall plate 141 are arranged to form a plurality of sixth flow channels 8.

[0043] Of course, in other embodiments, the third flow channel plate 142 , the fourth flow channel plate 143 , the fifth flow channel plate 152 and the sixth flow channel plate 153 may be separate pipes, and are not integrated with the housing 1 .

[0044] In this embodiment, the plurality of heat exchange plates 4 are specifically arranged in two layers along the vertical direction, and the number of the first flow channel 2, the second flow channel 3, the fourth flow channel 6, and the sixth flow channel 8 are also correspondingly provided in two. In other embodiments, the plurality of heat exchange plates 4 can also be arranged in other layers, and the size of the interval between two adjacent layers of heat exchange plates 4 can also be set according to actual cooling requirements, which is not limited here.

[0045] The cells are arranged in multiple rows and columns, 13 rows along the second direction, and 4 columns along the first direction, with a heat exchange plate between two adjacent rows of cells. The size of the heat exchange plate in the second direction (i.e., the distance between two adjacent cells 20 along the second direction) is preferably 5 mm.

[0046] It should be noted that, if the requirements are met, a heat exchange plate can be provided every two or more rows of battery cells 20, and there is no need to provide a heat exchange plate between every two rows of battery cells 20. The distance between two adjacent rows of battery cells and the distance between two adjacent columns of battery cells can also be set as required, and are not limited here.

[0047] The heat exchange plate 4 is made of metal material to have good thermal conductivity, and the battery pack 100 also includes an insulating film disposed between the heat exchange plate 4 and the battery cell 20, which can prevent a short circuit caused by direct contact between the battery cell 20 and the heat exchange plate 4. Alternatively, a layer of insulating paint can be sprayed on the outer surface of the heat exchange plate 4.

[0048] The box body 1 also includes a bottom wall 17 located below the accommodating cavity 11, and a plurality of grooves 171 extending along the second direction formed from a side of the bottom wall 17 close to the accommodating cavity 11. The plurality of grooves 171 are arranged at intervals along the first direction. A groove 171 is provided below each column of battery cells 20. The heat exchange fluid can flow in the groove 171 and with the bottom structure of the battery cell 20 to take away the heat from the bottom of the battery cell 20. The specific number and size of the grooves 171 are determined according to the actual cooling requirements and are not limited here. The box body 1 also includes an upper cover 18 for closing the accommodating cavity 11.

[0049] like Figure 8-10The figure shows a battery pack 100 according to a second embodiment of the present invention. Different from the above-mentioned first embodiment, in the thermal management device of the battery pack 100, the heat exchange plate 4 is arranged in a disconnected state, that is, the heat exchange plate 4 includes a first plate body 43 and a second plate body 44 respectively arranged on both sides of the first direction, the cavity 41 includes a first cavity 411 formed in the first plate body 43 and a second cavity 412 formed in the second plate body 44, the heat exchange plate 4 also includes a partition structure that separates the connection between the first cavity 411 and the second cavity 412, the opening 42 includes a first opening 421 located in the first plate body 43 and connecting the first cavity 411 and the accommodating cavity 11, and a second opening 422 located in the second plate body 44 and connecting the second cavity 412 and the accommodating cavity 11, the first plate body 43 is connected to the first side wall 12, the first cavity 411 is connected to the first flow channel 2, the second plate body 44 is connected to the second side wall 13, and the second cavity 412 is connected to the second flow channel 3.

[0050] Several disconnected heat exchange plates 4 are in a "rib" shape, and the heat exchange fluid in the first flow channel 2 cannot flow to the second flow channel 3 through the cavity 41 of the heat exchange plate 4, but first flows into the first cavity 411, then flows into the gap between the two rows of battery cells 20 from the first opening 421, and then flows into the second cavity 412 through the second opening 422, and then flows into the second flow channel 3 from the second cavity 412. The heat exchange fluid enters the first flow channel 2 from the first liquid port 21 and flows out of the second flow channel 3 from the second liquid port 31. In this way, the heat exchange fluid can flow more in the gap between the two rows of battery cells 20, thereby improving the thermal management efficiency of the thermal management device on the battery cells 20.

[0051] In this embodiment, the first plate body 43 and the second plate body 44 are spaced apart in the first direction, and the partition structure includes a first partition portion located at one end of the first plate body 43 close to the second plate body 44 and closing the first cavity 411, and a second partition portion located at one end of the second plate body 44 close to the first plate body 43 and closing the second cavity 412. The disconnection position of the heat exchange plate 4, that is, the spacing position between the first plate body 43 and the second plate body 44 can be adjusted as needed to minimize the flow of the heat exchange fluid. In this embodiment, the spacing is located between the two middle columns of battery cells 20. In other embodiments, the first plate body 43 and the first plate body 44 can also be connected as one.

[0052] The box body 1 includes a third side wall 14 and a fourth side wall 15 located on both sides of the accommodating cavity 11 in the first direction, and a third flow channel 5 and a plurality of fourth flow channels 6 respectively connecting the third flow channel 5 and a plurality of first flow channels 2 are formed in the third side wall 14, and the first liquid opening 21 is opened on the third side wall 14 and connected with the third flow channel 5; a fifth flow channel 7 and a plurality of sixth flow channels 8 respectively connecting the fifth flow channel 7 and a plurality of second flow channels 3 are formed in the fourth side wall 15, and the second liquid opening 31 is opened on the fourth side wall 15 and connected with the fifth flow channel 7.

[0053] With the above arrangement, the first liquid through port 21 and the second liquid through port 31 are arranged diagonally on the box body 1, and the heat exchange liquid can flow into the plurality of first flow channels 2 through the first liquid through port 21, and the heat exchange liquid in the plurality of second flow channels 3 can flow out of the box body 1 through the second liquid through port 31. The fourth side wall 15 includes a fourth wall plate 151, a fifth flow channel plate 152 connected to the fourth wall plate 151 on the side close to the accommodating chamber 11, and a plurality of sixth flow channel plates 153, the cross-sections of the fifth flow channel plate 152 and the plurality of sixth flow channels 153 are roughly C-shaped, the fourth wall plate 151 and the fifth flow channel plate 152 are arranged to form the fifth flow channel 7, and the fourth wall plate 151 and the sixth flow channel plate 153 are arranged to form the sixth flow channel 8.

[0054] It should be understood that although the present specification is described according to embodiments, not every embodiment contains only one independent technical solution. This narrative method of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

[0055] The above embodiments are only used to illustrate the technical solution of the present application and are not intended to limit it. Although the present application has been described in detail with reference to the preferred embodiments, a person skilled in the art should understand that the technical solution of the present application may be modified or replaced by equivalents without departing from the spirit and scope of the technical solution of the present application.

Claims

1. A thermal management device for a battery pack, characterized in that: The invention comprises a box body having a accommodating cavity, a first flow channel, a first liquid through port connected to the first flow channel, a second flow channel, a second liquid through port connected to the second flow channel, and a plurality of heat exchange plates having cavities arranged in the accommodating cavity, wherein the heat exchange plates extend along a first direction and their cavities connect the first flow channel and the second flow channel, the box body comprises a first side wall and a second side wall respectively located on both sides of the accommodating cavity in the first direction, a plurality of the heat exchange plates are connected to the first side wall and the second side wall, and are arranged at intervals along a second direction perpendicular to the first direction, and a plurality of openings are provided on the heat exchange plates connecting their cavities and the accommodating cavity.

2. The thermal management device according to claim 1, characterized in that: The first flow channel is formed in the first side wall, and the first side wall includes a first wall plate and a first flow channel plate connected to the first wall plate close to the accommodating cavity. The first wall plate and the first flow channel plate are arranged to form the first flow channel; the second flow channel is formed in the second side wall, and the second side wall includes a second wall plate and a second flow channel plate connected to the second wall plate close to the accommodating cavity. The second wall plate and the second flow channel plate are arranged to form the second flow channel; the heat exchange plate is connected to the first flow channel plate and the second flow channel plate.

3. The thermal management device according to claim 1 or 2, characterized in that: A plurality of the openings are opened on the upper end surface and / or the lower end surface of the heat exchange plate.

4. The thermal management device according to claim 3, characterized in that: The plurality of heat exchange plates are further arranged into a plurality of layers along an up-and-down direction, wherein the up-and-down direction is perpendicular to the first direction and the second direction, and there is a gap between two adjacent layers of heat exchange plates.

5. The thermal management device according to claim 4, characterized in that: The number of the first flow channels and the second flow channels is the same as the number of layers of the heat exchange plates, and the cavities of the heat exchange plates in each layer are connected to a first flow channel and a second flow channel respectively.

6. The thermal management device according to claim 5, characterized in that: The box body also includes a third side wall and a fourth side wall respectively located on both sides of the accommodating cavity in the second direction, a third flow channel, a plurality of fourth flow channels respectively connected to the third flow channel and a plurality of first flow channels, a fifth flow channel, and a plurality of sixth flow channels respectively connected to the fifth flow channel and a plurality of second flow channels are formed in the third side wall, the first liquid through port and the second liquid through port are opened on the third side wall and are respectively connected to the third flow channel and the fifth flow channel, and a third liquid through port connected to the accommodating cavity is opened on the fourth side wall.

7. The thermal management device according to claim 1, characterized in that: The box body further comprises a bottom wall located below the accommodating cavity, and a plurality of grooves extending along the second direction and concavely formed from a side of the bottom wall close to the accommodating cavity, wherein the plurality of grooves are arranged at intervals along the first direction.

8. The thermal management device according to claim 5, characterized in that: The heat exchange plate includes a first plate body and a second plate body respectively arranged on both sides of a first direction, the cavity includes a first cavity formed in the first plate body and a second cavity formed in the second plate body, the heat exchange plate also includes a partition structure for isolating the connection between the first cavity and the second cavity, the opening includes a first opening located in the first plate body and connecting the first cavity and the accommodating cavity, and a second opening located in the second plate body and connecting the second cavity and the accommodating cavity, the first plate body is connected to the first side wall, the first cavity is connected to the first flow channel, the second plate body is connected to the second side wall, and the second cavity is connected to the second flow channel.

9. The thermal management device according to claim 8, characterized in that: The box body also includes a third side wall and a fourth side wall respectively located on both sides of the accommodating cavity in the second direction, a third flow channel and a plurality of fourth flow channels respectively connected to the third flow channel and a plurality of first flow channels are formed in the third side wall, the first liquid opening is opened on the third side wall and connected to the third flow channel; a fifth flow channel and a plurality of sixth flow channels respectively connected to the fifth flow channel and a plurality of second flow channels are formed in the fourth side wall, the second liquid opening is opened on the fourth side wall and connected to the fifth flow channel.

10. A battery pack, characterized in that: It comprises a thermal management device for a battery pack as described in any one of claims 1 to 9, and a plurality of battery cells arranged in the accommodating cavity, wherein the plurality of battery cells are arranged in a plurality of rows along a second direction, and the heat exchange plate is located between two adjacent rows of battery cells.

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