An energy storage device

Abstract

The application discloses an energy storage device, which comprises a top plate, a first heat exchange module, a plurality of battery cells, a second heat exchange module and a third heat exchange module. The top plate has a first seat surface and a second seat surface arranged oppositely in the thickness direction of the top plate. The first heat exchange module is arranged on the side of the first seat surface away from the second seat surface and sequentially provided with a plurality of accommodating cavities in the thickness direction of the top plate. The plurality of battery cells in each accommodating cavity are arranged at intervals in the length direction and the width direction of the top plate. The second heat exchange module is connected with the first heat exchange module, and part of the structure of the second heat exchange module is located in the gap of each battery cell in the length direction of the top plate. The third heat exchange module is connected with the first heat exchange module, and part of the structure of the third heat exchange module is located in the gap of each battery cell in the width direction of the top plate. Compared with the conventional scheme, the contact area of the battery cell and the heat dissipation structure is greatly improved, and the heat dissipation effect is better.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of energy storage, in particular to an energy storage device. BACKGROUND

[0002] A plurality of battery cells are arranged in the battery box, and a large amount of heat is generated by the battery cells during charging and discharging. If the heat generated by the battery cells cannot be dissipated in time, the service life of the battery cells will be affected, and even thermal runaway will occur, which will cause safety problems. In order to cool the battery cells, a heat exchange plate is arranged in the traditional battery box to dissipate heat from the battery cells.

[0003] However, the contact area between the heat exchange plate and the battery cells in the traditional battery box is small, which limits the heat dissipation of the heat exchange plate for the battery box and results in poor heat dissipation effect. SUMMARY

[0004] The main purpose of the present application is to provide an energy storage device, which aims to solve the problem that the contact area between the heat exchange plate and the battery cells in the traditional battery box is small, which limits the heat dissipation of the heat exchange plate for the battery box and results in poor heat dissipation effect.

[0005] To achieve the above-mentioned purpose, the present application provides an energy storage device, which comprises a top plate, a first heat exchange module, a plurality of battery cells, a second heat exchange module and a third heat exchange module. The top plate has a first seat surface and a second seat surface arranged opposite in the thickness direction of the top plate. The first heat exchange module is arranged on the side of the first seat surface away from the second seat surface and has a plurality of accommodating cavities arranged in sequence in the thickness direction of the top plate. The plurality of battery cells are arranged on the inner wall of each accommodating cavity away from the top plate, wherein the plurality of battery cells in each accommodating cavity are arranged in the length direction and the width direction of the top plate. The second heat exchange module is connected with the first heat exchange module and has the freedom to move in the width direction of the top plate, and part of the structure of the second heat exchange module is located in the gap of each battery cell in the length direction of the top plate. The third heat exchange module is connected with the first heat exchange module and has the freedom to move in the length direction of the top plate, and part of the structure of the third heat exchange module is located in the gap of each battery cell in the width direction of the top plate.

[0006] Optionally, the positive and negative tabs of each battery cell are located on the side of the corresponding battery cell facing the top plate. The plurality of battery cells arranged in the width direction of the top plate form a battery cell strip, and the plurality of battery cell strips arranged in the thickness direction of the top plate form a battery cell group. The energy storage device further comprises a first connecting piece, a second connecting piece and a third connecting piece. The first connecting piece is electrically connected to adjacent battery cells in the same battery cell strip. The second connecting piece is electrically connected to adjacent battery cell strips in the same battery cell group. The third connecting piece is electrically connected to adjacent battery cell groups.

[0007] Optionally, the first heat exchange module comprises a first side plate, a second side plate and a plurality of first heat exchange plates, the first side plate is fixed to the top plate and parallel to the width direction of the top plate; the second side plate is fixed to the top plate and perpendicular to the first side plate, the second side plate and the first side plate are both located at the edge of the top plate; a plurality of first heat exchange plates are arranged in the thickness direction of the top plate on the side of the first seat surface away from the second seat surface and are fixed to the first side plate; wherein each first heat exchange plate and the adjacent first heat exchange plate or the top plate enclose the accommodation cavity.

[0008] Optionally, the first heat exchange plate farthest from the top plate is fixed to the second side plate, and the remaining first heat exchange plates have gaps between the second side plate to connect the cell strips in the same cell group by the second connecting piece.

[0009] Optionally, the second heat exchange module comprises a third side plate and a plurality of second heat exchange plates, wherein the third side plate is arranged on the side of the first heat exchange plate away from the second side plate; a plurality of second heat exchange plates are all fixed to the side of the third side plate facing the second side plate; wherein in the length direction of the top plate, each second heat exchange plate is located in the gap between adjacent cell strips, and a plurality of second heat exchange plates are arranged in the thickness direction and the length direction of the top plate.

[0010] Optionally, when each second heat exchange plate is located in the gap between adjacent cell strips, the side of the third side plate facing the second side plate is in contact with the first side plate and is connected to the first side plate by a bolt; wherein the second heat exchange plate has a gap with the second side plate to connect adjacent cell groups by the third connecting piece; the first heat exchange plate has a gap with the third side plate to connect the cell strips in the same cell group by the second connecting piece.

[0011] Optionally, a plurality of through grooves are arranged on each second heat exchange plate; the third heat exchange module comprises a fourth side plate and a plurality of third heat exchange plates, the fourth side plate is arranged on the side of the first heat exchange plate away from the first side plate; a plurality of third heat exchange plates are all fixed to the side of the fourth side plate facing the first side plate and correspond to the plurality of through grooves on each second heat exchange plate, and the third heat exchange plate is arranged in the through groove; wherein in the width direction of the top plate, each third heat exchange plate is located in the gap between adjacent cells, and a plurality of third heat exchange plates are arranged in the thickness direction and the width direction of the top plate.

[0012] Optionally, when each third heat exchange plate is located in the gap between adjacent cells, the side of the fourth side plate facing the first side plate is in contact with the second side plate and is connected to the second side plate by a bolt.

[0013] Optionally, in each of the accommodating cavities, the third heat exchange plate is located between the first connecting plate and the first heat exchange plate.

[0014] Optionally, the first side plate is provided with a first liquid inlet flow channel and a first liquid outlet flow channel, each of the first heat exchange plates is provided with a first heat exchange flow channel in communication with the first liquid inlet flow channel and the first liquid outlet flow channel; the third side plate is provided with a second liquid inlet flow channel and a second liquid outlet flow channel, each of the second heat exchange plates is provided with a second heat exchange flow channel in communication with the second liquid inlet flow channel and the second liquid outlet flow channel; the fourth side plate is provided with a third liquid inlet flow channel and a third liquid outlet flow channel, each of the third heat exchange plates is provided with a third heat exchange flow channel in communication with the third liquid inlet flow channel and the third liquid outlet flow channel; wherein the first liquid inlet flow channel, the first liquid outlet flow channel, the second liquid inlet flow channel, the second liquid outlet flow channel, the third liquid inlet flow channel, the third liquid outlet flow channel and the external pipeline are in communication to form a circulation loop.

[0015] The energy storage device provided by the embodiment of the present application is characterized in that the first heat exchange module contacts the side of each battery cell away from the top plate for heat dissipation, part of the structure of the second heat exchange module is located in the gap of the battery cell in the length direction of the top plate to dissipate heat for the battery cell, part of the structure of the third heat exchange module is located in the gap of the battery cell in the width direction of the top plate to dissipate heat for the battery cell, and the side of most of the battery cells away from the top plate and the periphery thereof are in contact with the heat exchange structure for heat dissipation. Compared with the traditional scheme, the contact area of the battery cell and the heat dissipation structure is greatly improved, and the heat dissipation effect is better. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 The overall structure schematic diagram of the energy storage device provided by the embodiment of the present application is shown in FIG. 1.

[0017] Figure 2 The structure of the energy storage device provided by the embodiment of the present application is shown in FIG. 2. Figure 1 The structure of the energy storage device provided by the embodiment of the present application is shown in FIG. 2. Figure 1 ;

[0018] Figure 3 The structure of the energy storage device provided by the embodiment of the present application is shown in FIG. 2. Figure 1 The structure of the energy storage device provided by the embodiment of the present application is shown in FIG. 2. Figure 2 ;

[0019] Figure 4 The structure of the energy storage device provided by the embodiment of the present application is shown in FIG. 2. Figure 1 The structure of the energy storage device provided by the embodiment of the present application is shown in FIG. 2. Figure 3 ;

[0020] Figure 5 The structure schematic diagram of the battery cell of the energy storage device provided by the embodiment of the present application is shown in FIG. 3.

[0021] Figure 6 The structure schematic diagram of the battery cell of the energy storage device provided by the embodiment of the present application is shown in FIG. 3. Figure 1 The structure schematic diagram of the battery cell of the energy storage device provided by the embodiment of the present application is shown in FIG. 3.

[0022] Figure 7 A first heat exchange module structure diagram of an energy storage device provided by an embodiment of the present application is provided.

[0023] Figure 8 A second heat exchange module structure diagram of an energy storage device provided by an embodiment of the present application is provided.

[0024] In the figure: 1, top plate; 2, battery cell; 31, first connecting plate; 32, second connecting plate; 33, third connecting plate; 41, first side plate; 42, second side plate; 43, first heat exchange plate; 51, third side plate; 52, second heat exchange plate; 521, through groove; 61, fourth side plate; 62, third heat exchange plate.

[0025] The implementation, functional features and advantages of the present application will be further described with reference to the embodiments and the accompanying drawings. DETAILED DESCRIPTION

[0026] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work fall within the scope of protection of the present application.

[0027] It should be noted that all directionality indications (such as up, down, left, right, front, back, etc.) in the embodiments of the present application are only used to explain the relative positional relationship, movement condition, etc. between components in a certain specific posture (as shown in the drawings), and if the specific posture changes, the directionality indications also change accordingly.

[0028] In the present application, unless otherwise explicitly specified and limited, the terms "connection", "fixation", etc. should be understood in a broad sense, for example, "fixation" can be fixed connection, or detachable connection, or integral; can be mechanical connection, or electrical connection; can be direct connection, or indirect connection through an intermediate medium; can be internal connection of two elements or interaction relationship between two elements, unless otherwise explicitly limited. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0029] In addition, if the description of "first", "second" and the like is involved in the embodiments of the present application, the description of "first", "second" and the like is only for the purpose of description, and cannot be understood as indicating or implying the relative importance of the indicated technical features or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first", "second" can be explicitly or implicitly included at least one of the features. In addition, the meaning of "and / or" appearing throughout the text includes three parallel schemes, for example, "A and / or B" includes A scheme, or B scheme, or A and B scheme. In addition, the technical solutions of each embodiment can be combined with each other, but it must be based on the realization of the technical personnel in the art, when the combination of technical solutions appears contradictory or unachievable, it should be considered that the combination of technical solutions does not exist, nor within the scope of protection required by the present application.

[0030] Reference Figures 1-8 It should be understood that Figures 2-4 The connection of each component in the Figure 1 The connection of each component in the Figures 2-4 The connection of each component in the The energy storage device provided by the embodiments of the present application can include a top plate 1, a first heat exchange module, a plurality of battery cells 2, a second heat exchange module and a third heat exchange module. The top plate 1 has a first seat surface and a second seat surface oppositely arranged in the thickness direction of the top plate 1. The first heat exchange module is arranged on the side of the first seat surface away from the second seat surface and has a plurality of accommodating cavities arranged in the thickness direction of the top plate 1. The plurality of battery cells 2 are arranged on the inner wall of each accommodating cavity away from the top plate 1, wherein the plurality of battery cells 2 in each accommodating cavity are arranged at intervals in the length direction and the width direction of the top plate 1. The second heat exchange module is connected with the first heat exchange module and has the freedom to move along the width direction of the top plate 1, and part of the structure of the second heat exchange module is located in the gap of each battery cell 2 in the length direction of the top plate 1. The third heat exchange module is connected with the first heat exchange module and has the freedom to move along the length direction of the top plate 1, and part of the structure of the third heat exchange module is located in the gap of each battery cell 2 in the width direction of the top plate 1.

[0031] The energy storage device provided by the embodiments of the present application can include a top plate 1, a first heat exchange module, a plurality of battery cells 2, a second heat exchange module and a third heat exchange module. The top plate 1 has a first seat surface and a second seat surface oppositely arranged in the thickness direction of the top plate 1. The first heat exchange module is arranged on the side of the first seat surface away from the second seat surface and has a plurality of accommodating cavities arranged in the thickness direction of the top plate 1. The plurality of battery cells 2 are arranged on the inner wall of each accommodating cavity away from the top plate 1, wherein the plurality of battery cells 2 in each accommodating cavity are arranged at intervals in the length direction and the width direction of the top plate 1. The second heat exchange module is connected with the first heat exchange module and has the freedom to move along the width direction of the top plate 1, and part of the structure of the second heat exchange module is located in the gap of each battery cell 2 in the length direction of the top plate 1. The third heat exchange module is connected with the first heat exchange module and has the freedom to move along the length direction of the top plate 1, and part of the structure of the third heat exchange module is located in the gap of each battery cell 2 in the width direction of the top plate 1.

[0032] The top plate 1 can be a rectangular plate, and the top plate 1 has a length, a width and a thickness.

[0033] Specifically, as shown in Figure 1 , the second seat surface away from the first seat surface is provided with positive and negative electrode tabs connected with external electrical equipment, and the positive and negative electrode tabs on the top plate 1 are connected in series with each other.

[0034] Referring to Figure 5 , in the exemplary embodiment, the positive and negative electrode tabs of each battery cell 2 are located on the side of the corresponding battery cell 2 facing the top plate 1; the plurality of battery cells 2 arranged in the width direction of the top plate 1 form a battery cell strip, and the plurality of battery cell strips arranged in the thickness direction of the top plate 1 form a battery cell group; the energy storage device can further include a first connecting piece 31, a second connecting piece 32, and a third connecting piece 33, the first connecting piece 31 electrically connecting adjacent battery cells 2 within the same battery cell strip; the second connecting piece 32 electrically connecting adjacent battery cell strips within the same battery cell group; and the third connecting piece 33 electrically connecting adjacent battery cell groups.

[0035] Specifically, as shown in Figure 5 , the first connecting piece 31, the second connecting piece 32, and the third connecting piece 33 are all connected with the positive or negative electrode tab of the corresponding battery cell.

[0036] It should be understood that each accommodating cavity is provided with a plurality of battery cell strips arranged in the length direction of the top plate 1, and the battery cell strips within the same battery cell group are located in different accommodating cavities, and adjacent battery cell strips within the same battery cell group are connected by the second connecting piece 32, so that there must be a region through which the second connecting piece 32 passes between the two adjacent accommodating cavities.

[0037] As shown in Figure 5 , after the battery cells 2 are connected in series by the first connecting piece 31, the second connecting piece 32, and the third connecting piece 33, one positive electrode tab and one negative electrode tab will be left over, the remaining positive electrode tab can be electrically connected with the positive electrode tab on the top plate 1, and the remaining negative electrode tab can be electrically connected with the negative electrode tab on the top plate 1.

[0038] Referring to Figure 3 and Figure 4 , in the exemplary embodiment, the first heat exchange module can include a first side plate 41, a second side plate 42, and a plurality of first heat exchange plates 43, the first side plate 41 is fixed with the top plate 1 and parallel to the width direction of the top plate 1; the second side plate 42 is fixed with the top plate 1 and perpendicular to the first side plate 41, and the second side plate 42 and the first side plate 41 are both located at the edge of the top plate 1; the plurality of first heat exchange plates 43 are arranged in the thickness direction of the top plate 1 on the side of the first seat surface away from the second seat surface and are fixed with the first side plate 41; wherein each first heat exchange plate 43 and the adjacent first heat exchange plate 43 or the top plate 1 enclose an accommodating cavity; the first heat exchange plate 43 farthest from the top plate 1 is fixed with the second side plate 42, and the remaining first heat exchange plates 43 have gaps between them and the second side plate 42 to connect the battery cell strips within the same battery cell group by the second connecting piece 32.

[0039] Specifically, as shown in Figure 3 , the first heat exchange plates 43 can be four, and the receiving cavities are four, and each electric core 2 is in contact with each first heat exchange plate 43 on the side away from the top plate 1 to dissipate heat.

[0040] Among them, the first side plate 41 is arranged at the wide edge of the top plate 1, and the second side plate 42 is arranged at the long edge of the top plate 1. The top plate 1 and the first side plate 41 can be connected by bolts, so as to facilitate disassembly of the top plate 1 for maintenance of the electric core 2. At the same time, the second side plate 42 can also be connected with the first side plate 41 by bolts, so that the second side plate 42 can be disassembled from the first side plate 41 and placed below. It is more convenient to arrange the electric core 2 on each first heat exchange plate 43, and it is more convenient to electrically connect each electric core 2 through the first connecting piece 31, the second connecting piece 32 and the third connecting piece 33. After the electric core 2 is connected, the second side plate 42 and the first side plate 41 are connected.

[0041] It should be noted that, as shown in Figure 3 , the first heat exchange plate 43 farthest from the top plate 1 can be understood as a bottom plate, which is oppositely arranged with the top plate 1 in the thickness direction of the top plate 1, and is fixedly connected with the first side plate 41 and the second side plate 42. The remaining first heat exchange plates 43 are only fixedly connected with the first side plate 41. In the width direction of the top plate 1, the first heat exchange plates 43 except the bottom plate have gaps between them and the second side plate 42, so that the second connecting pieces 32 can pass through the adjacent receiving cavities. Figure 3 It can be seen from the above structure that the second connecting piece 32 far from the second side plate 42 is wrapped outside the corresponding first heat exchange plate 43 to pass through the adjacent receiving cavities, and the position relationship between the second connecting piece 32 close to the second side plate 42 and the first heat exchange plate 43 is similar to the above structure, that is, the second connecting piece 32 passes through the gap between the corresponding first heat exchange plate 43 and the second side plate 42 to electrically connect the corresponding two electric core strips.

[0042] Referring to Figure 3 , in an exemplary embodiment, the second heat exchange module can include a third side plate 51 and a plurality of second heat exchange plates 52, wherein the third side plate 51 is arranged on the side of the first heat exchange plate 43 away from the second side plate 42; the plurality of second heat exchange plates 52 are fixed on the side of the third side plate 51 facing the second side plate 42; wherein in the length direction of the top plate 1, each second heat exchange plate 52 is located in the gap between the adjacent electric core strips, and the plurality of second heat exchange plates 52 are arranged in the thickness direction and the length direction of the top plate 1.

[0043] Specifically, when the battery cell 2 is connected to the first heat exchange module, the third side plate 51 can be moved along the width direction of the top plate 1, and the third side plate 51 drives the plurality of second heat exchange plates 52 to move synchronously, and each second heat exchange plate 52 is inserted into the gap between the battery cell strips in the length direction of the top plate 1, so that the second heat exchange plate 52 can dissipate heat for the adjacent battery cell 2, and the contact area between the battery cell 2 and the heat exchange structure is increased, and the heat dissipation efficiency is higher.

[0044] It should be understood that in each accommodating cavity, the number of second heat exchange plates 52 is less than the number of battery cell strips by one, and each second heat exchange plate 52 is arranged in the gap between the battery cell strips in the length direction of the top plate 1.

[0045] Reference Figure 6 In the example embodiment, when each second heat exchange plate 52 is located in the gap between the adjacent battery cell strips, the side of the third side plate 51 facing the second side plate 42 is in contact with the first side plate 41 and is connected to the first side plate 41 by bolts; wherein the second heat exchange plate 52 and the second side plate 42 have a gap for the third connecting piece 33 to connect adjacent battery cell groups; the first heat exchange plate 43 and the third side plate 51 have a gap for the second connecting piece 32 to connect the battery cell strips in the same battery cell group.

[0046] Specifically, when each second heat exchange plate 52 is located in the gap between the adjacent battery cell strips, the side of the third side plate 51 facing the second side plate 42 is in contact with the first side plate 41 and is connected to the first side plate 41 by bolts, so that the position of the third side plate 51 and the second heat exchange plate 52 can be fixed, that is, the position of the second heat exchange module is fixed, and the third side plate 51 is prevented from moving when the energy storage device is used; at the same time, when the third side plate 51 is moved to the position where the third side plate 51 is in contact with the first side plate 41, the second heat exchange plate 52 and the third connecting piece 33 are not in contact, and the third side plate 51 is more convenient to move, without considering the size of the moving distance, and the first side plate 41 is in contact.

[0047] It should be understood that, as Figure 6 shown, when each second heat exchange plate 52 is located in the gap between the adjacent battery cell strips, in the width direction of the top plate 1, the second heat exchange plate 52 and the second side plate 42 have a gap, the third connecting piece 33 is a U-shaped structure and is arranged on the side of the battery cell group close to the second side plate 42, at this time the third connecting piece 33 bypasses the second heat exchange plate 52 to connect the corresponding two battery cell groups.

[0048] It should be noted that, as Figure 6 shown, when each second heat exchange plate 52 is located in the gap between the adjacent battery cell strips, the first heat exchange plate 43 and the third side plate 51 have a gap for the second connecting piece 32 to connect the battery cell strips in the same battery cell group.

[0049] Reference Figure 4 andFigure 6 In the example embodiment, each second heat exchange plate 52 is provided with a plurality of through grooves 521; the third heat exchange module can include a fourth side plate 61 and a plurality of third heat exchange plates 62, the fourth side plate 61 is arranged on the side of the first heat exchange plate 43 away from the first side plate 41; the plurality of third heat exchange plates 62 are fixed to the side of the fourth side plate 61 facing the first side plate 41 and correspond to the plurality of through grooves 521 on each second heat exchange plate 52, and the third heat exchange plate 62 is arranged in the through groove 521; wherein, in the width direction of the top plate 1, each third heat exchange plate 62 is located in the gap between adjacent battery cells 2, and the plurality of third heat exchange plates 62 are arranged in the thickness direction and the width direction of the top plate 1.

[0050] Specifically, after the second heat exchange module is connected with the first heat exchange module, the fourth side plate 61 can be moved along the length direction of the top plate 1, and the plurality of third heat exchange plates 62 are moved synchronously by the fourth side plate 61, each third heat exchange plate 62 is inserted into the gap between the battery cells 2 in the width direction of the top plate 1, so that the third heat exchange plate 62 can dissipate heat for the adjacent battery cells 2, further improve the contact area between the battery cells 2 and the heat exchange structure, and the heat dissipation efficiency is higher.

[0051] It should be understood that, as shown in Figure 6 , the third heat exchange plate 62 will be sequentially inserted into the corresponding through groove 521 during the movement process, so that the movement process of the third heat exchange plate 62 will not be affected by the second heat exchange plate 52.

[0052] Referring to Figure 2 and Figure 3 , in the example embodiment, when each third heat exchange plate 62 is located in the gap between adjacent battery cells 2, the side of the fourth side plate 61 facing the first side plate 41 is in contact with the second side plate 42 and is connected with the second side plate 42 by bolts.

[0053] Specifically, when each third heat exchange plate 62 is located in the gap between adjacent battery cells 2, the side of the fourth side plate 61 facing the first side plate 41 is in contact with the second side plate 42 and is connected with the second side plate 42 by bolts, so that the position of the fourth side plate 61 and the third heat exchange plate 62 can be fixed, that is, the position of the third heat exchange module is fixed, preventing the fourth side plate 61 from moving when the energy storage device is used; at the same time, when the fourth side plate 61 is moved to the position where the fourth side plate 61 is in contact with the second side plate 42, the third heat exchange plate 62 is in contact with the first side plate 41, and the fourth side plate 61 is in contact with the battery cell 2, so that it is more convenient to move the fourth side plate 61, and it is not necessary to consider the size of the moving distance, and the fourth side plate 61 can be in contact with the second side plate 42.

[0054] In the example embodiment, in each accommodating cavity, the third heat exchange plate 62 is located between the first connecting piece 31 and the first heat exchange plate 43, so that the third heat exchange plate 62 will not collide with the first connecting piece 31 during movement, and the use is safer.

[0055] Reference Figure 7 and Figure 8 In the example embodiment, the first side plate 41 is provided with a first liquid inlet channel and a first liquid outlet channel, each first heat exchange plate 43 is provided with a first heat exchange channel communicated with the first liquid inlet channel and the first liquid outlet channel; the third side plate 51 is provided with a second liquid inlet channel and a second liquid outlet channel, each second heat exchange plate 52 is provided with a second heat exchange channel communicated with the second liquid inlet channel and the second liquid outlet channel; the fourth side plate 61 is provided with a third liquid inlet channel and a third liquid outlet channel, each third heat exchange plate 62 is provided with a third heat exchange channel communicated with the third liquid inlet channel and the third liquid outlet channel; wherein the first liquid inlet channel, the first liquid outlet channel, the second liquid inlet channel, the second liquid outlet channel, the third liquid inlet channel, the third liquid outlet channel and the external pipeline form a circulation loop.

[0056] Specifically, as shown in Figure 7 each first heat exchange plate 43 is provided with a first heat exchange loop, the first heat exchange loop has a first liquid inlet and a first liquid outlet, the first liquid inlet is communicated with the first liquid inlet channel, and the first liquid outlet is communicated with the first liquid outlet channel, Figure 7 only one first heat exchange loop of one first heat exchange plate 43 is drawn, and the first heat exchange loops of the remaining first heat exchange plates 43 are similar to it; as shown in Figure 8 each second heat exchange plate 52 is provided with a second heat exchange loop, the second heat exchange loop has a second liquid inlet and a second liquid outlet, the second liquid inlet is communicated with the second liquid inlet channel, and the second liquid outlet is communicated with the second liquid outlet channel, Figure 8 only one second heat exchange loop of one second heat exchange plate 52 is drawn, and the second heat exchange loops of the remaining second heat exchange plates 52 are similar to it, wherein the second liquid inlet channel and the second liquid outlet channel are curvedly arranged; the third liquid inlet channel, the third liquid outlet channel and the like are arranged on the third heat exchange module in a similar manner, Figure 8 and will not be described in detail here; in this way, when the first liquid inlet channel, the first liquid outlet channel, the second liquid inlet channel, the second liquid outlet channel, the third liquid inlet channel, the third liquid outlet channel and the external pipeline form a circulation loop, cooling liquid can be introduced into the circulation loop to dissipate heat of the battery cell 2 inside the energy storage device.

[0057] It should be noted that heating liquid can also be introduced into the circulation loop to heat the battery cell 2, so as to adjust the working temperature of the energy storage device and make the energy storage device work in the best temperature range. For example, when the energy storage device is applied to a vehicle, if the external temperature is low, the heating liquid is introduced into the circulation loop to preheat the battery cell 2, which is beneficial to the starting of the vehicle.

[0058] The above merely preferred embodiments of the present application and are not intended to limit the patent scope of the present application, any equivalent structure or equivalent process transformation using the content of the present application specification and drawings, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present application.

Claims

1. An energy storage device, characterized in that, include: The top plate (1) has a first seat surface and a second seat surface disposed opposite to each other in the thickness direction of the top plate (1); The first heat exchange module is located on the side of the first seat surface away from the second seat surface and has a plurality of receiving cavities arranged sequentially in the thickness direction of the top plate (1); Multiple battery cells (2) are disposed on the inner wall of each of the accommodating cavities away from the top plate (1), wherein the multiple battery cells (2) in each of the accommodating cavities are spaced apart in the length and width directions of the top plate (1); The second heat exchange module is connected to the first heat exchange module and has the freedom to move along the width direction of the top plate (1). A portion of the structure of the second heat exchange module is located within the gap between each of the battery cells (2) in the length direction of the top plate (1). The third heat exchange module is connected to the first heat exchange module and has the degree of freedom to move along the length direction of the top plate (1). A portion of the structure of the third heat exchange module is located within the gap between each of the battery cells (2) in the width direction of the top plate (1). Multiple battery cells (2) spaced apart in the width direction of the top plate (1) constitute a battery cell strip, and multiple battery cell strips spaced apart in the thickness direction of the top plate (1) constitute a battery cell group; The first heat exchange module includes: The first side plate (41) is fixed to the top plate (1) and parallel to the width direction of the top plate (1); The second side plate (42) is fixed to the top plate (1) and perpendicular to the first side plate (41). Both the second side plate (42) and the first side plate (41) are located at the edge of the top plate (1). Multiple first heat exchange plates (43) are spaced apart on the side of the first seat surface away from the second seat surface in the thickness direction of the top plate (1) and fixed to the first side plate (41); Each of the first heat exchange plates (43) and the adjacent first heat exchange plate (43) or the top plate (1) form the receiving cavity; The second heat exchange module includes: The third side plate (51) is disposed on the side of the first heat exchange plate (43) away from the second side plate (42); Multiple second heat exchange plates (52) are fixed to the side of the third side plate (51) facing the second side plate (42); In the length direction of the top plate (1), each of the second heat exchange plates (52) is located in the gap between adjacent battery cells, and multiple second heat exchange plates (52) are spaced apart in the thickness direction and length direction of the top plate (1). Each of the second heat exchange plates (52) is provided with multiple through slots (521); the third heat exchange module includes: The fourth side plate (61) is disposed on the side of the first heat exchange plate (43) away from the first side plate (41); Multiple third heat exchange plates (62) are fixed to the side of the fourth side plate (61) facing the first side plate (41) and correspond one-to-one with multiple through slots (521) on each of the second heat exchange plates (52). The third heat exchange plates (62) are inserted into the through slots (521). In the width direction of the top plate (1), each of the third heat exchange plates (62) is located in the gap between adjacent cells (2), and multiple third heat exchange plates (62) are spaced apart in the thickness direction and width direction of the top plate (1). When each of the third heat exchange plates (62) is located in the gap between adjacent cells (2), the side of the fourth side plate (61) facing the first side plate (41) abuts against the second side plate (42) and is bolted to the second side plate (42).

2. The energy storage device as described in claim 1, characterized in that, The positive and negative tabs of each of the battery cells (2) are located on the side of the battery cell (2) facing the top plate (1); The energy storage device also includes: The first connecting piece (31) is electrically connected to adjacent cells (2) within the same cell bar. The second connecting piece (32) is electrically connected to adjacent cell bars within the same cell group; The third connecting piece (33) is electrically connected to the adjacent battery cell group.

3. The energy storage device as described in claim 2, characterized in that, The first heat exchange plate (43) furthest from the top plate (1) is fixed to the second side plate (42), and the remaining first heat exchange plates (43) and the second side plates (42) have gaps to allow the second connecting piece (32) to connect the cell strips in the same cell group.

4. The energy storage device as described in claim 2, characterized in that, When each of the second heat exchange plates (52) is located in the gap between adjacent battery cells, the side of the third side plate (51) facing the second side plate (42) abuts against the first side plate (41) and is connected to the first side plate (41) by bolts. The second heat exchange plate (52) and the second side plate (42) have a gap for the third connecting piece (33) to connect adjacent battery cell groups; There is a gap between the first heat exchange plate (43) and the third side plate (51) to allow the second connecting piece (32) to connect the cell bar in the same cell group.

5. The energy storage device as described in claim 2, characterized in that, Within each of the accommodating cavities, the third heat exchange plate (62) is located between the first connecting piece (31) and the first heat exchange plate (43).

6. The energy storage device as described in claim 1, characterized in that, The first side plate (41) is provided with a first liquid inlet channel and a first liquid outlet channel, and each of the first heat exchange plates (43) is provided with a first heat exchange channel that communicates with the first liquid inlet channel and the first liquid outlet channel. The third side plate (51) is provided with a second liquid inlet channel and a second liquid outlet channel, and each of the second heat exchange plates (52) is provided with a second heat exchange channel that communicates with the second liquid inlet channel and the second liquid outlet channel; The fourth side plate (61) is provided with a third liquid inlet channel and a third liquid outlet channel, and each of the third heat exchange plates (62) is provided with a third heat exchange channel that communicates with the third liquid inlet channel and the third liquid outlet channel; The first liquid inlet channel, the first liquid outlet channel, the second liquid inlet channel, the second liquid outlet channel, the third liquid inlet channel, the third liquid outlet channel, and the external pipeline are connected to form a circulation loop.

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