Immersed battery pack

Abstract

The utility model relates to the technical field of energy storage equipment, and particularly discloses an immersed battery pack, the immersed battery pack comprises a box body and a plurality of battery cell modules, the box body comprises a bottom wall, a side wall formed by extending upwards from the peripheral side of the bottom wall, an accommodating cavity defined by the bottom wall and the side wall, and at least two liquid passing ports communicated with the accommodating cavity, the plurality of battery cell modules are arranged in the accommodating cavity, the at least two liquid passing ports are used for enabling heat exchange liquid to flow in and out of the accommodating cavity, each battery cell module comprises a plurality of battery cells and a plurality of conducting strips, each battery cell comprises a cell body and a pole arranged on one side of the cell body, and the plurality of conducting strips are electrically connected with the pole of the corresponding battery cell. The battery cell lies down, so that the side, provided with the pole, of the battery cell faces the side wall, the conducting strips cannot be higher than the battery cell, and after heat exchange liquid is injected into the containing cavity, the conducting strips can be fully immersed in the heat exchange liquid so as to effectively take away heat on the conducting strips.

Description

Technical Field

[0001] The utility model relates to the technical field of energy storage equipment, in particular to an immersion battery pack. Background Art

[0002] The cells in the immersed battery pack will generate a lot of heat during the charging and discharging process, which seriously affects the service life and safety of the cells. In response to this, the immersed battery pack is equipped with a thermal management device to control the temperature of the cells. In the current development trend, immersion thermal management is another major breakthrough after air cooling, liquid cooling and direct cooling.

[0003] During the use of the battery cell, a large amount of heat will be generated on the conductive sheet connected to the electrode column, which also needs to be controlled. At present, traditional thermal management devices that use air cooling and liquid cooling solutions have ignored the control of the temperature on the conductive sheet. In the latest immersion thermal management system, the cooling heat exchange surface and flow turbulence are only set for the core of the battery cell. The side of the battery cell with the electrode column is set upward, and the conductive sheet cannot have a strong turbulent flow like the core body. Therefore, the heat on the conductive sheet cannot be effectively carried away by the heat exchange liquid, and the temperature of the conductive sheet and the core body of the battery cell will be different. Utility Model Content

[0004] The utility model aims to provide an immersion battery pack which can dissipate heat from a conductive sheet on a battery cell.

[0005] To achieve the above-mentioned purpose, the utility model proposes an immersion battery pack, comprising a box body and a plurality of battery cell modules, the box body comprising a bottom wall, a side wall extending upward from the peripheral side of the bottom wall, a accommodating cavity surrounded by the bottom wall and the side wall, and at least two liquid ports connected to the accommodating cavity, a plurality of battery cell modules are arranged in the accommodating cavity, at least two of the liquid ports are used to allow heat exchange liquid to flow into and out of the accommodating cavity, each of the battery cell modules comprises a plurality of battery cells and a plurality of conductive sheets, the battery cell comprises a core body, a pole arranged on one side of the core body, a plurality of the conductive sheets are electrically connected to the poles of the corresponding battery cells, the side of the battery cell provided with the pole is arranged toward the side wall, and the conductive sheet is located on one side of the battery cell in the horizontal direction.

[0006] As a further improvement of the utility model, several of the battery cell modules are arranged at intervals along the first direction, several battery cells in each of the battery cell modules are arranged at intervals along a second direction perpendicular to the first direction, several battery cells in several battery cell modules are arranged at intervals into several rows along the second direction, a first gap is formed between two adjacent battery cell modules, the conductive sheet is located in the first gap, and the immersion battery pack also includes a guide structure connected to the liquid port and used to promote the flow of heat exchange liquid in the first gap.

[0007] As a further improvement of the present invention, a plurality of conductive sheets in two adjacent battery core modules are arranged close to each other so as to be located in the same first gap.

[0008] As a further improvement of the utility model, a second gap that is cross-shaped with the first gap is formed between two adjacent rows of battery cells, the flow guide structure includes a first flow channel, a second flow channel, and a plurality of heat exchange plates arranged in the second gaps, the heat exchange plate has a cavity connecting the first flow channel and the second flow channel, and a plurality of openings connecting the cavity and the accommodating cavity, and the plurality of openings are located in the first gap and / or the second gap, and the liquid opening includes a first liquid opening connected to the first flow channel, a second liquid opening connected to the second flow channel, and a third liquid opening connected to the accommodating cavity.

[0009] As a further improvement of the utility model, in each of the battery cells, the pole includes a first pole and a second pole spaced apart in the up-down direction, the plurality of conductive sheets include a plurality of first conductive sheets and a plurality of second conductive sheets, the plurality of first conductive sheets are located above the heat exchange plate and electrically connected to the first poles of the corresponding battery cells, the plurality of second conductive sheets are located below the heat exchange plate and electrically connected to the second poles of the corresponding battery cells, and at least part of the openings are opened on the upper end surface and / or the lower end surface of the heat exchange plate and are correspondingly located in the first gap.

[0010] As a further improvement of the present invention, at least part of the openings are opened on the upper end surface and / or the lower end surface of the heat exchange plate and are correspondingly located in the second gap.

[0011] As a further improvement of the present invention, the side wall comprises a first side wall and a second side wall respectively located on both sides of the accommodating cavity in a first direction, and the heat exchange plate is connected to the first side wall and the second side wall.

[0012] 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, and 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, 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, and the heat exchange plate is connected to the first flow channel plate and the second flow channel plate.

[0013] As a further improvement of the utility model, the side wall 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 connected to the first flow channel and a fourth flow channel connected to the second flow channel are formed in the first side wall, the first liquid opening and the second liquid opening are opened in the third side wall and respectively connected to the third flow channel and the fourth flow channel, and the third liquid opening is opened in the fourth side wall.

[0014] As a further improvement of the present invention, a side of the bottom wall close to the accommodating cavity is concavely formed with a plurality of grooves extending along the second direction, and the plurality of grooves are arranged at intervals along the second direction.

[0015] Beneficial effects of the utility model:

[0016] The immersion battery pack provided by the utility model changes the conventional design in the prior art that the side of the battery cell with the pole is arranged upward and the conductive sheet is located above the battery cell. Instead, the battery cell is "laid down" so that the side of the battery cell with the pole is arranged toward the side wall, and the conductive sheet is located on one side of the battery cell in the horizontal direction. In this way, a number of conductive sheets will not be higher than the battery cell. After the heat exchange liquid is injected into the accommodating cavity, the heat exchange liquid can fully immerse the several conductive sheets to effectively take away the heat on the conductive sheets. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 A schematic diagram of an exploded structure of an immersed battery pack is provided for one embodiment of the utility model;

[0018] Figure 2 for Figure 1 Another exploded structural diagram of the immersed battery pack after the upper cover is removed, in which the box is cut open to show;

[0019] Figure 3 for Figure 2 A schematic diagram of the structure of several battery modules and several heat exchange plates;

[0020] Figure 4 for Figure 3 The enlarged schematic diagram of point A in the middle;

[0021] Figure 5 for Figure 2 A schematic diagram of the side structure of several battery modules and several heat exchange plates;

[0022] Figure 6 for Figure 2 A schematic diagram of the cross-sectional structure of the middle box;

[0023] Figure 7 for Figure 2 Schematic diagram of the structure of the middle box. DETAILED DESCRIPTION

[0024] 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.

[0025] 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.

[0026] like Figure 1-7 The figure shows an immersed battery pack 100 provided by an embodiment of the present invention, which includes a box 10 and a plurality of battery modules 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 immersion battery pack 100 , the Y-axis represents the second direction of the immersion battery pack 100 , and the Z-axis represents the up-down direction of the immersion battery pack 100 .

[0027] The box body 10 includes a bottom wall 2, a side wall 1 extending upward from the peripheral side of the bottom wall 2, a receiving chamber 3 surrounded by the bottom wall 2 and the side wall 1, and at least two liquid openings 4 communicating with the receiving chamber 3. A plurality of battery modules 20 are arranged in the receiving chamber 3. The at least two liquid openings 4 are used to allow heat exchange liquid to flow into and out of the receiving chamber 3. The heat exchange liquid flowing into the receiving chamber 3 can immerse the battery module 20 to take away the heat on the battery module 20, and then flows out of the receiving chamber 3. It can be imagined that the heat exchange liquid can also heat up the battery module 20.

[0028] Each battery module 20 includes a plurality of battery cells 21 and a plurality of conductive sheets 22. The conductive sheets 22 are made of materials with good conductivity such as copper and aluminum, and therefore can also be called aluminum bars or copper bars. The battery cell 21 includes a core 211 and a pole 212 disposed on one side of the core 211. The plurality of conductive sheets 22 are electrically connected to the poles 212 of the corresponding battery cells 21, so that the plurality of battery cells 21 in the same battery module 20 are connected in series or in parallel. How the plurality of conductive sheets 22 are electrically connected to the poles 212 of the corresponding battery cells 21 can refer to the prior art and will not be described in detail here.

[0029] In this embodiment, the conventional design in the prior art that the side of the battery cell 21 with the pole 212 is arranged upward and the conductive sheet 22 is located above the battery cell 21 is changed. Instead, the battery cell 21 is "laid down" so that the side of the battery cell 21 with the pole 212 is arranged toward the side wall 1, and the conductive sheet 22 is located on one side of the battery cell 21 in the horizontal direction. In this way, a number of conductive sheets 22 will not be higher than the battery cell 21. After the heat exchange liquid is injected into the accommodating cavity 3, the heat exchange liquid can fully immerse a number of conductive sheets 22 to effectively take away the heat on the conductive sheets 22. The above-mentioned horizontal direction should be understood as a direction perpendicular to the up and down direction.

[0030] Specifically, a plurality of battery modules 20 are arranged at intervals along a first direction, and a plurality of battery cells 21 in each battery module 20 are arranged at intervals along a second direction perpendicular to the first direction. As a whole, it can be seen that a plurality of battery cells 21 in a plurality of battery modules 20 are arranged at intervals along the second direction in a plurality of rows, wherein a first gap 23 is formed between two adjacent battery modules 20, and the conductive sheet 22 is located in the first gap 23. The immersion battery pack 100 further includes a flow guide structure 5 connected to the liquid port 4 and used to promote the flow of the heat exchange liquid in the first gap 23. Under the action of the flow guide structure 5, the heat exchange liquid can be guided from the liquid port 4 to the first gap 23 for flow, so as to effectively take away the heat on the plurality of conductive sheets 22.

[0031] As a preferred solution of this embodiment, the conductive sheets 22 in two adjacent battery modules 20 are arranged close to each other so as to be located in the same first gap 23. The conductive sheets 22 in two adjacent battery modules 20 are located in the same first gap 23, so that the heat exchange liquid can centrally take away the heat from the conductive sheets 22. The first gap 23 containing the conductive sheets 22 of two adjacent battery modules 20 has a larger size in the first direction, and can accommodate more heat exchange liquid flowing therein, so as to enhance the cooling effect of the heat exchange liquid on the battery cells 21 and the conductive sheets 22.

[0032] In other embodiments, the sides of the plurality of battery cell modules 20 with the poles 212 may be arranged in the same direction.

[0033] In this embodiment, a second gap 24 is formed between two adjacent rows of battery cells 21, which is cross-shaped with the first gap 23. It can be understood that a plurality of second gaps 24 are formed between a plurality of rows of battery cells 21, and the first gaps 23 and the second gaps 24 are interconnected. The flow guide structure 5 includes a first flow channel 51, a second flow channel 52, and a plurality of heat exchange plates 53 arranged in the plurality of second gaps 24. The heat exchange plate 53 has a cavity 531 connecting the first flow channel 51 and the second flow channel 52, and a plurality of openings 532 connecting the cavity 531 and the accommodating cavity 3, and the plurality of openings 532 are located in the first gap 23 and / or the second gap 24; the liquid port 4 includes a first liquid port 41 connected to the first flow channel 51, a second liquid port 42 connected to the second flow channel 52, and a third liquid port 43 connected to the accommodating cavity 3.

[0034] With the above arrangement, the heat exchange liquid can flow into the first flow channel 51 and the second flow channel 52 from the first liquid through port 41 and the second liquid through port 42 respectively, and then flow into the cavities 531 of the plurality of heat exchange plates 53 from the first flow channel 51 and the second flow channel 52. After the heat exchange liquid flows into the cavities 531 of the plurality of heat exchange plates 53, it can flow into the first gap 23 and / or the second gap 24 from the plurality of openings 532. Because the first gap 23 and the second gap 24 are connected, therefore, whether the flow guide structure 5 directly guides the heat exchange liquid into the first gap 23 or guides the heat exchange liquid into the second gap 24 and then flows into the first gap 23, it can promote the flow of the heat exchange liquid in the first gap 23. It can be imagined that the flow guide structure 5 also promotes the flow of the heat exchange liquid in the second gap 24. In this way, the heat exchange liquid can effectively take away the heat from the core 211 and the conductive sheet 22. After heat exchange with the battery cell 21, the heat exchange liquid flows out of the accommodating cavity 3 through the third liquid through port 43. The heat exchange liquid flows into the accommodating chamber 3 through the first liquid opening 41 and the second liquid opening 42 , and flows out of the accommodating chamber 3 through the third liquid opening 43 . The heat exchange liquid can keep flowing in the accommodating chamber 3 to continuously remove the heat from the battery cell 21 .

[0035] It is conceivable that the heat exchange liquid may flow into the accommodating chamber 3 through the third liquid port 43 and flow out of the accommodating chamber 3 through the first liquid port 41 and the second liquid port 42, or may flow into the accommodating chamber 3 through the first liquid port 41 and flow out of the accommodating chamber 3 through the second liquid port 42.

[0036] Specifically, in each battery cell 21, the pole 212 includes a first pole 2121 and a second pole 2122 spaced apart in the up-down direction, the first pole 2121 and the second pole 2122 have opposite polarities, that is, one is a positive pole and the other is a negative pole, the plurality of conductive sheets 22 include a plurality of first conductive sheets 221 and a plurality of second conductive sheets 222, the plurality of first conductive sheets 221 are located above the heat exchange plate 53 and are electrically connected to the first pole 2121 of the corresponding battery cell 21, the plurality of second conductive sheets 222 are located below the heat exchange plate 53 and are electrically connected to the second pole 2122 of the corresponding battery cell 21, and at least part of the opening 532 is opened on the upper end surface and / or the lower end surface of the heat exchange plate 53 and is correspondingly located in the first gap 23.

[0037] As shown in the figure, when a plurality of conductive sheets 22 are used to connect a plurality of battery cells 21 in series, the conductive sheets 22 are located on the upper side or the lower side of the heat exchange plate 53. Therefore, an opening 532 is provided on the upper end surface or the lower end surface of the heat exchange plate 53 and the opening 532 is located in the second gap 24. After the heat exchange fluid flows out of the cavity 531 from the opening 532 located in the second gap 24, it can directly impact the first conductive sheet 221 or the second conductive sheet 222 in the up and down direction.

[0038] Further, at least part of the openings 532 are opened on the upper end surface and / or the lower end surface of the heat exchange plate 53 and are correspondingly located in the second gap 24, that is, the openings 532 on the heat exchange plate 53 are distributed in the first gap 23 and the second gap 24, and the flow guide structure 5 can directly guide the heat exchange liquid into the first gap 23 and the second gap 24, so that the heat exchange liquid flows in the first gap 23 and the second gap 24. In order to make the heat exchange liquid fully flow in the second gap 24, openings 532 can be opened on both the upper end surface and the lower end surface of the heat exchange plate 53.

[0039] The size of the battery cell 21 in the first direction is larger than its size in the second direction. In this way, the heat exchange plate 53 is arranged between the "large surfaces" of the two battery cells 21, and the heat exchange fluid entering and exiting the cavity 531 of the heat exchange plate 53 from the opening 532 also flows through the "large surface" of the battery cell 21. The heat exchange fluid can fully take away the heat from the battery cell 21.

[0040] In this embodiment, the side wall 1 includes a first side wall 11 and a second side wall 12 respectively located on both sides of the accommodating cavity 3 in the first direction. The heat exchange plate 53 is connected to the first side wall 11 and the second side wall 12, and is fixed relative to the box body 10. For the battery cells 21 arranged in several rows, the heat exchange plate 53 is located between two adjacent rows of battery cells 21, and two adjacent heat exchange plates 53 clamp a row of battery cells 21 from both sides. Therefore, the above-mentioned several heat exchange plates 53 also play a role in limiting the positions of several battery cells 21.

[0041] It should be noted that, if the requirements are met, a heat exchange plate 53 can be provided every two or more rows of battery cells 21, and there is no need to provide a heat exchange plate 53 between every two rows of battery cells 21. The distance between two adjacent rows of battery cells 21 and the distance between two adjacent columns of battery cells 21 can also be set as required, and are not limited here. In this embodiment, the distance between two adjacent rows of battery cells 21 is 5 mm.

[0042] The heat exchange plate 53 is made of metal material to have good thermal conductivity, and the submerged battery pack 100 further includes an insulating film disposed between the heat exchange plate 53 and the battery cell 21, which can prevent a short circuit caused by direct contact between the battery cell 21 and the heat exchange plate 53. Alternatively, a layer of insulating paint can be sprayed on the outer surface of the heat exchange plate 53.

[0043] Specifically, the first flow channel 51 is formed in the first side wall 11, and the first side wall 11 includes a first wall plate 111 and a first flow channel plate 112 connected to the first wall plate 111 near the side of the accommodating cavity 3, the first flow channel plate 112 extends along the second direction, and its cross-section is roughly C-shaped, the first wall plate 111 and the first flow channel plate 112 are arranged to form the first flow channel 51; the second flow channel 52 is formed in the second side wall 12, the second side wall 12 includes a second wall plate 121 and a second flow channel plate 122 connected to the second wall plate 121 near the side of the accommodating cavity 3, the second flow channel plate 122 extends along the second direction, and its cross-section is roughly C-shaped, the second wall plate 121 and the second flow channel plate 122 are arranged to form the second flow channel 52, and the heat exchange plate 53 is connected to the first flow channel plate 112 and the second flow channel plate 122. With the above arrangement, the first flow channel 51 and the second flow channel 52 are integrated with the box body 10 , so that the structure of the immersed battery pack 100 is simpler.

[0044] Furthermore, the side wall 1 further includes a third side wall 13 and a fourth side wall 14 respectively located on both sides of the accommodating cavity 3 in the second direction, a third flow channel 54 communicating with the first flow channel 51 and a fourth flow channel 55 communicating with the second flow channel 52 are formed in the third side wall 13, the first liquid passage 41 and the second liquid passage 42 are opened on the third side wall 13 and respectively communicate with the third flow channel 54 and the fourth flow channel 55, and the third liquid passage 43 is opened on the fourth side wall 14. With the above arrangement, the third flow channel and the fourth flow channel are integrated with the box body 10, and the first liquid passage 41 and the second liquid passage 42 are concentrated on the third side wall 13. It can be imagined that the third liquid passage 43 is also opened on the first side wall 11, the second side wall 12, the fourth side wall 14 and even the bottom wall 2.

[0045] Specifically, the third side wall 13 includes a third wall plate 131, a third flow channel plate 132 and a fourth flow channel plate 133 connected to the third wall plate 131 on the side close to the accommodating chamber 3, the third flow channel plate 132 and the fourth flow channel plate 133 both extend along the first direction, and the cross-sections are both roughly C-shaped, the third wall plate 131 and the third flow channel plate 132 are arranged to form the third flow channel, and the third wall plate 131 and the fourth flow channel plate 133 are arranged to form the fourth flow channel 55.

[0046] In other embodiments, the first flow channel 51 and the second flow channel 52 can also be set separately, that is, the thermal management device includes a first pipe and a second pipe located in the accommodating cavity 3, the first flow channel 51 is formed in the first pipe, and the second flow channel 52 is formed in the second pipe. Similarly, the third flow channel 54 and the fourth flow channel 55 can also be set separately.

[0047] The bottom wall 2 is provided with a plurality of grooves 201 extending along the second direction on one side close to the accommodating cavity 3. The plurality of grooves 201 are arranged at intervals along the first direction. A groove 201 is provided below each column of battery cells 21. The heat exchange fluid can flow in the groove 201 and communicate with the bottom structure of the battery cell 21 to take away the heat at the bottom of the battery cell 21. The specific number and size of the grooves 201 are determined according to the actual cooling requirements and are not limited here. The box body 10 also includes an upper cover 6 for closing the accommodating cavity 3.

[0048] 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.

[0049] 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. An immersion battery pack, comprising a box body and a plurality of battery cell modules, wherein the box body comprises a bottom wall, a side wall extending upward from the peripheral side of the bottom wall, a receiving cavity surrounded by the bottom wall and the side wall, and at least two liquid through ports communicating with the receiving cavity, wherein a plurality of battery cell modules are arranged in the receiving cavity, and at least two of the liquid through ports are used to allow heat exchange liquid to flow into and out of the receiving cavity, wherein each of the battery cell modules comprises a plurality of battery cells and a plurality of conductive sheets, wherein the battery cell comprises a core body and a pole arranged on one side of the core body, and wherein the plurality of conductive sheets are electrically connected to the poles of the corresponding battery cells, It is characterized in that The side of the battery core provided with the pole is arranged toward the side wall, and the conductive sheet is located at one side of the battery core in the horizontal direction.

2. The submerged battery pack according to claim 1, It is characterized in that Several of the battery cell modules are arranged at intervals along a first direction, several battery cells in each of the battery cell modules are arranged at intervals along a second direction perpendicular to the first direction, several battery cells in several battery cell modules are arranged at intervals into several rows along the second direction, a first gap is formed between two adjacent battery cell modules, the conductive sheet is located in the first gap, and the immersion battery pack also includes a guide structure connected to the liquid port and used to promote the flow of heat exchange liquid in the first gap.

3. The submerged battery pack according to claim 2, It is characterized in that The conductive sheets in two adjacent battery core modules are arranged close to each other so as to be located in the same first gap.

4. The submerged battery pack according to claim 2, It is characterized in that A second gap that intersects the first gap is formed between two adjacent rows of battery cells. The flow guide structure includes a first flow channel, a second flow channel, and a plurality of heat exchange plates arranged in the second gaps. The heat exchange plate has a cavity connecting the first flow channel and the second flow channel, and a plurality of openings connecting the cavity and the accommodating cavity. The plurality of openings are located in the first gap and / or the second gap. The liquid through port includes a first liquid through port connected to the first flow channel, a second liquid through port connected to the second flow channel, and a third liquid through port connected to the accommodating cavity.

5. The submerged battery pack according to claim 4, It is characterized in that In each of the battery cells, the poles include a first pole and a second pole spaced apart in the up-down direction, the plurality of conductive sheets include a plurality of first conductive sheets and a plurality of second conductive sheets, the plurality of first conductive sheets are located above the heat exchange plate and electrically connected to the first poles of the corresponding battery cells, the plurality of second conductive sheets are located below the heat exchange plate and electrically connected to the second poles of the corresponding battery cells, and at least part of the openings are opened on the upper end surface and / or the lower end surface of the heat exchange plate and are correspondingly located in the first gap.

6. The submerged battery pack according to claim 5, It is characterized in that At least part of the openings are opened on the upper end surface and / or the lower end surface of the heat exchange plate and are correspondingly located in the second gap.

7. The submerged battery pack according to claim 4, It is characterized in that The side walls include a first side wall and a second side wall respectively located at two sides of the accommodating cavity in a first direction, and the heat exchange plate is connected to the first side wall and the second side wall.

8. The submerged battery pack according to claim 7, It is characterized in that The first flow channel is formed in the first side wall, 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, 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, and the heat exchange plate is connected to the first flow channel plate and the second flow channel plate.

9. The submerged battery pack according to claim 8, It is characterized in that The side wall 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 connected to the first flow channel and a fourth flow channel connected to the second flow channel are formed in the first side wall, the first liquid opening and the second liquid opening are opened in the third side wall and respectively connect the third flow channel and the fourth flow channel, and the third liquid opening is opened in the fourth side wall.

10. The submerged battery pack according to claim 1, It is characterized in that A side of the bottom wall close to the accommodating cavity is concavely formed with a plurality of grooves extending along the second direction, and the plurality of grooves are arranged at intervals along the second direction.

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