CN220544034U - Battery cluster and energy storage device - Google Patents

Abstract

The application relates to a battery cluster and an energy storage device. The battery cluster comprises a cluster frame, a temperature equalizing plate, a module unit and a heat dissipation structure. The top of the cluster frame is provided with an air supply duct which is used for inputting cooling air flow. At least one module unit is arranged on the cluster frame, each module unit comprises at least two parallel electric core modules, a temperature equalizing plate is connected between two adjacent electric core modules, and the temperature equalizing plates are arranged at intervals and form a heat dissipation air channel. The heat dissipation structure is connected with the temperature equalization plate, the heat dissipation structure is provided with a plurality of heat dissipation fins, at least part of the plurality of heat dissipation fins are exposed in the air supply duct, and the air supply duct and the heat dissipation duct are communicated through a spacing space formed among the plurality of heat dissipation fins. Compared with the traditional air cooling, the energy storage device with the battery cluster has higher heat dissipation performance, overcomes the problem of overlarge temperature difference of the system, and improves the safety of the system and the whole service life.

Description

Battery clusters and energy storage devices

Technical field

This application relates to the field of energy storage technology, and in particular to a battery cluster and energy storage equipment.

Background technique

Traditional air-cooled container-type energy storage equipment relies on air conditioning and internal air ducts to deliver cold air to each battery cluster inside the container, and then the fan module on each battery cluster draws air for heat dissipation. Because the container is too large, the cold air distribution will be insufficient. average, which in turn leads to an excessive temperature difference across the entire system, affecting system safety and overall lifespan.

Contents of the invention

Based on this, it is necessary to provide a battery cluster and energy storage device to solve the problem of excessive temperature difference in the entire system due to uneven distribution of cold air.

A battery cluster including:

A cluster frame, the top of the cluster frame is provided with an air supply duct, and the air supply duct is used to input cooling air flow;

vapor chamber;

Module unit, at least one of the module units is provided on the cluster frame, each of the module units includes at least two battery core modules arranged in parallel, and one of the two adjacent battery core modules The temperature equalizing plates are connected in between, and the temperature equalizing plates are arranged at intervals and form cooling air ducts; and

A heat dissipation structure, the heat dissipation structure is connected to the vapor chamber, the heat dissipation structure is provided with a plurality of heat dissipation fins, at least part of the plurality of heat dissipation fins are exposed in the air supply duct, and the plurality of heat dissipation fins are The space formed between the heat dissipation fins is connected with the heat dissipation air duct.

By configuring a vapor chamber to connect to the battery core module, and setting a heat dissipation structure to connect to the vapor chamber plate, the heat generated by the individual cells of the battery module is transmitted to the heat dissipation structure through the vapor chamber plate, and the heat dissipation structure is provided with multiple heat dissipation fins. At least part of the heat dissipation fins are located in the air supply duct. When used in energy storage equipment, the vapor vapor plate greatly improves the temperature uniformity of the system. The heat dissipation fins increase the heat dissipation area, improve the heat dissipation efficiency, and avoid the problem of cold air distribution. Unevenness causes the temperature difference of the entire system to be too large; therefore, compared with traditional air cooling, energy storage equipment with the above-mentioned battery clusters has higher heat dissipation performance, overcomes the problem of excessive system temperature differences, and improves system safety. and overall longevity. Moreover, since the cooling air duct is connected to the air supply duct through the heat dissipation structure, the cooling air flow can form a circulation and take away the heat in time. Compared with the traditional technology where the fan module on each battery pack exhausts air for heat dissipation, energy storage equipment There is no need to install fan components, which avoids setting too many fan components and increasing the unreliability and maintenance costs of the entire system. It also discards components such as battery pack casings, which greatly reduces costs and improves energy density.

In one embodiment, the top of the temperature equalizing plate protrudes from the top of the battery module; the heat dissipation structure includes a connection part and a plurality of the heat dissipation fins, and the connection part is provided on two On the top of the temperature equalizing plate, a plurality of heat dissipation fins are provided on the top of the connection part and located in the air supply duct. The connection part is provided with a communication hole, and the communication hole is used to connect all The air supply duct and the cooling air duct. The heat dissipation structure further increases the heat dissipation area, improves heat dissipation efficiency, and makes the temperature uniformity of the entire system better. In one embodiment, the spacing direction of the plurality of heat dissipation fins is perpendicular to the extension direction of the air supply duct, thereby reducing wind resistance and cooling airflow flowing through the space formed between the heat dissipation fins. , and take away the heat on it in time.

In one embodiment, the plurality of heat dissipation fins are spaced in the same direction as the extension direction of the air supply duct, and the plurality of heat dissipation fins are provided with a plurality of spaced guide grooves, each of which is The air guide groove penetrates all the heat dissipation fins along the extending direction of the air supply duct. The guide grooves can reduce wind resistance and allow the cooling air flow to pass smoothly through the heat sink fins along the guide grooves.

In one embodiment, the heat dissipation structure includes a plurality of connectors and a plurality of heat sinks, a plurality of the connectors are connected between the two vapor chambers, and the plurality of heat sinks are spaced apart from each other. On each of the connectors and spaced apart from the two vapor chambers, a plurality of heat dissipation fins are formed on the tops of the plurality of heat dissipation fins. Connectors can enhance heat transfer and serve as installations for multiple heat sinks.

In one embodiment, the battery cluster further includes: a plurality of thermal conductive members, a plurality of the thermal conductive members are provided on the vaporizing plate, and each thermal conductive member is located adjacent to the battery core module. between the sides of the two battery cells. The setting of thermal conductive parts can enhance the heat dissipation and temperature uniformity of the battery cells.

In one embodiment, the sides of two adjacent battery core modules are connected to the sides of the temperature equalizing plate through thermally conductive structural glue. The thermally conductive structural adhesive can improve the heat conduction effect and improve the temperature uniformity of the temperature equalizing plate. Effect.

An energy storage device including:

box;

A battery cluster, the battery cluster is arranged in the box, and the battery cluster is the battery cluster as described above; and

Refrigeration equipment, the refrigeration equipment is arranged on the box, and the air supply port of the refrigeration equipment is connected with the air supply air duct. The energy storage device has the same technical effect as the battery cluster as mentioned above, which will not be described again here.

In one embodiment, one end of the air supply duct away from the air supply opening is closed; an air outlet duct is provided between the bottom of the battery cluster and the bottom of the box. The duct connects the cooling air duct of the battery cluster and the air outlet of the refrigeration equipment. After the cold air flow enters the cooling space, it enters the cooling air duct through the heat dissipation structure, flows through the cooling air duct and then enters the outlet air duct, and finally flows into the air exhaust port to complete the air flow circulation, which is beneficial to improving heat dissipation efficiency.

An energy storage device including:

box;

A battery cluster, the battery cluster is arranged in the box, and the battery cluster is the battery cluster as described above; and

Refrigeration equipment, the refrigeration equipment is arranged on the box, and the air supply port of the refrigeration equipment is connected with the air supply duct;

Wherein, the top surface of the heat dissipation fins, the top surface of the temperature equalizing plate and the inner surface of the bottom wall of the air supply duct are arranged flush with each other. The energy storage device has the same technical effect as the battery cluster as mentioned above, which will not be described again here.

Description of drawings

Figure 1 is a schematic structural diagram of an energy storage device in an embodiment of the present application.

Figure 2 is a cross-sectional view of the energy storage device in Figure 1.

Figure 3 is a schematic structural diagram of the battery cluster of the energy storage device in Figure 2.

Figure 4 is another structural schematic diagram of the battery cluster of the energy storage device in Figure 2.

FIG. 5 is a partial enlarged view of area A of the battery cluster in FIG. 4 .

FIG. 6 is a schematic structural diagram of two vapor chambers and multiple connectors of the battery cluster in FIG. 3 .

Figure 7 is a front view of the energy storage device with its box hidden in another embodiment of the present application.

FIG. 8 is a front view of the battery cluster of the energy storage device in FIG. 7 .

Figure 9 is a top view of the battery cluster in Figure 8.

Figure 10 is a top view of a battery cluster of an energy storage device in yet another embodiment of the present application.

Explanation of reference symbols:

100. Energy storage equipment; 110. Box; 112. Air supply duct; 114. Air outlet; 116. Air outlet duct; 120. Refrigeration equipment; 122. Air supply outlet; 124. Air exhaust outlet;

200. Battery cluster; 210. Cluster frame; 220. Uniform temperature plate; 222. Cooling air duct; 230. Module unit; 232. Battery cell module; 234. Battery cell single body; 240. Heat dissipation structure; 241. Heat dissipation Fins; 242, connecting piece; 243, heat sink; 244, connecting part; 245, communication hole; 246, flow guide groove; 250, side plate; 260, heat conductive piece.

Detailed ways

In order to make the above objects, features and advantages of the present application more obvious and easy to understand, the specific implementation modes of the present application will be described in detail below with reference to the accompanying drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present application. However, the present application can be implemented in many other ways different from those described here. Those skilled in the art can make similar improvements without violating the connotation of the present application. Therefore, the present application is not limited by the specific embodiments disclosed below.

In the description of this application, it should be understood that if the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", " "Front", "Back", "Left", "Right", "Vertical", "Horizontal", "Top", "Bottom", "Inside", "Outside", "Clockwise", "Counterclockwise", "Axis", "radial", "circumferential", etc., the orientation or positional relationship indicated by these terms is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present application and simplifying the description, rather than indicating Or it is implied that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore cannot be construed as a limitation on the present application.

In addition, if the terms "first" and "second" appear, these terms are used for descriptive purposes only and cannot be understood as indicating or implying the relative importance or implicitly indicating the quantity of the indicated technical features. Therefore, features defined as "first" and "second" may explicitly or implicitly include at least one of these features. In the description of this application, if the term "plurality" appears, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise expressly and specifically limited.

In this application, unless otherwise expressly stated and limited, if the terms "installation", "connection", "connection", "fixing", etc. appear, these terms should be understood in a broad sense. For example, it can be a fixed connection or a detachable connection, or it can be integrated; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be an internal connection between two components. or the interaction between two elements, unless otherwise expressly limited. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to specific circumstances.

In this application, unless otherwise explicitly stated and limited, if a first feature is "on" or "below" a second feature or similar descriptions, the meaning may be that the first and second features are in direct contact, or The first and second characteristics are in indirect contact through an intermediary. Furthermore, the terms "above", "above" and "above" the first feature is above the second feature may mean that the first feature is directly above or diagonally above the second feature, or simply means that the first feature is higher in level than the second feature. "Below", "below" and "beneath" the first feature to the second feature may mean that the first feature is directly below or diagonally below the second feature, or simply means that the first feature has a smaller horizontal height than the second feature.

It should be noted that if an element is referred to as being "fixed to" or "disposed on" another element, it can be directly on the other element or intervening elements may also be present. If an element is said to be "connected" to another element, it can be directly connected to the other element or there may also be intervening elements present. If present, the terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used in this application are for illustrative purposes only and are not meant to be exclusive. implementation.

Please refer to Figures 1 to 3. Figure 1 shows a schematic structural diagram of the energy storage device in an embodiment of the present application. Figure 2 shows a cross-sectional view of the energy storage device in Figure 1. Figure 3 shows a schematic diagram of the energy storage device in Figure 2. A schematic structural diagram of a battery cluster of the device. An energy storage device 100 provided by an embodiment of the present application includes a box 110, a refrigeration device 120 and a battery cluster 200. The refrigeration equipment 120 is installed on the box 110 , and has an air supply port 122 and an air exhaust port 124 . The battery cluster 200 is disposed in the box 110 and includes a cluster frame 210. An air supply duct 112 is provided on the top of the cluster frame 210. The air supply duct 112 is connected to the air supply outlet 112 of the refrigeration equipment 120. The bottom of the air supply channel 112 is A plurality of air outlets 114 are provided on the wall. The air supply duct 112 is used to transport the cooling air flow output from the air supply port 122 of the refrigeration device 120 and to dissipate heat from the battery cluster 200 through the air outlet 114 .

In this embodiment, three battery clusters 200 are arranged side by side and spaced apart along the extension direction of the air supply duct 112 , and two air outlets 114 are arranged corresponding to one battery cluster 200 . It should be noted that the number of battery clusters 200 is not limited to three. In other embodiments, the number of battery clusters 200 may be one, two, four or more, and the air outlet 114 above a battery cluster 200 It is not limited to two. The more the number of air outlets 114, the better the heat dissipation effect of the battery cluster 200.

In this embodiment, the battery cluster 200 also includes a vapor chamber 220, a module unit 230, and a heat dissipation structure 240. At least one module unit 230 is provided on the cluster frame 210 , and each module unit 230 includes at least two battery core modules 232 arranged in parallel. A uniform temperature plate 220 is connected between two adjacent battery core modules 232 . The two uniform temperature plates 220 are spaced apart and form a cooling air duct 222 . The cooling air duct 222 connects the top space and the bottom space of the module unit 230 . The heat dissipation structure 240 is connected to the vapor chamber 220 . The heat dissipation structure 240 is provided with a plurality of heat dissipation fins 241 . At least part of the plurality of heat dissipation fins 241 is exposed in the air supply duct 112 and is arranged corresponding to the air outlet 114 . The space formed between the plurality of heat dissipation fins 241 communicates with the air supply air duct 112 and the heat dissipation air duct 222 .

By arranging the temperature equalizing plate 220 to connect with the battery cell module 232 and setting the heat dissipation structure 240 to connect with the temperature equalizing plate 220, the heat generated by the cell cells 234 of the battery core module 232 is conducted to the heat dissipation structure 240 through the temperature equalizing plate 220. The heat dissipation structure 240 is provided with a plurality of heat dissipation fins 241. At least part of the heat dissipation fins 241 is located in the air supply duct 112. The vapor chamber 220 greatly improves the temperature uniformity of the system. The heat dissipation fins 241 increase the heat dissipation area and improve the The heat dissipation efficiency avoids excessive temperature differences in the entire system due to uneven distribution of cold air; therefore, compared with traditional air cooling, the energy storage device 100 in this embodiment has higher heat dissipation performance and overcomes the problem of excessive temperature differences in the system. problem, improving system safety and overall lifespan; moreover, because the cooling air duct 222 is connected to the air supply air duct 112 through the heat dissipation structure 240, the cooling air flow can form a circulation and take away the heat in time. Compared with the traditional technology, each The fan module on each battery pack exhausts air for heat dissipation. In this embodiment, the energy storage device 100 does not need to be equipped with a fan assembly, so as to avoid installing too many fan assemblies and increasing the unreliability and maintenance cost of the entire system, and the battery pack casing is discarded. and other components, greatly reducing costs and increasing energy density.

In this embodiment, each cluster frame 210 is provided with two module units 230 , and the two module units 230 are arranged side by side and spaced apart along the extension direction of the air supply duct 112 . Each module unit 230 includes at least two battery cell modules 232 arranged in parallel. The cluster frame 210 has multiple interlayer structures, and each layer of cell cells 234 in each cell module 232 is disposed on an interlayer structure of the cluster frame 210 . It can be understood that in other embodiments, more than three module units 230 can be provided on each cluster frame 210, and a heat dissipation structure 240 can be provided between two adjacent module units 230 to improve the heat dissipation effect; Each module unit 230 may include three or more battery core modules 232, and a heat dissipation structure 240 is provided between any two adjacent battery core modules 232. Each air outlet 114 of the air supply duct 112 is provided corresponding to a heat dissipation structure 240 .

In this embodiment, one end of the air supply duct 112 away from the air supply opening 122 is closed to form a cooling space. An air outlet duct 116 is provided between the bottom of the battery cluster 200 and the bottom of the box 110 . The air outlet duct 116 communicates with the cooling air duct 222 and the air exhaust port 124 of the refrigeration equipment 120 . After the cold air flow enters the cooling space, it enters the cooling air duct 222 through the heat dissipation structure 240, flows through the cooling air duct 222, enters the outlet air duct 116, and finally flows into the air exhaust port 124, thereby completing the air flow circulation, which is beneficial to improving the heat dissipation efficiency. .

In this embodiment, the battery cluster 200 further includes two side plates 250. The two side plates 250 are connected between the two temperature equalizing plates 220. The two temperature equalizing plates 220 and the two side surfaces are enclosed to form a cooling air duct 222.

Referring to FIGS. 4 to 6 , the heat dissipation structure 240 includes a plurality of connectors 242 and a plurality of heat sinks 243 . The plurality of connectors 242 are connected between the two vapor chambers 220 . The plurality of heat sinks 243 are spaced between a plurality of heat sinks 243 . On the connecting piece 242 and spaced apart from the two vapor chambers 220 , a plurality of heat dissipation fins 241 are formed on the tops of the plurality of heat dissipation fins 243 . The connector 242 can enhance heat exchange and also serve to install multiple heat sinks 243. The heat sinks 243 can be connected to the connector 242 through low-temperature solder paste reflow soldering.

Referring to FIG. 2 , in this embodiment, the top surface of the heat dissipation fins 241 and the top surface of the temperature equalizing plate 220 are flush with the inner surface of the bottom wall of the air supply duct 112 , thereby reducing the wind resistance of the cooling air flow and improving the heat dissipation effect. . It should be noted that in other embodiments, the tops of the heat dissipation fins 241 and the tops of the temperature equalizing plates 220 may be located in the air supply duct 112 , and at the same time, in order to reduce wind resistance, the tops of the heat dissipating fins 241 and the temperature equalizing plates 220 may be A drainage groove is provided along the extending direction of the air supply duct 112 to allow the cooling air flow to pass through.

The sides of two adjacent battery modules 232 are connected to the sides of the vapor chamber 220 through a thermally conductive structural adhesive (not shown). The thermally conductive structural adhesive can improve the heat conduction effect and improve the temperature equalization effect of the vapor chamber 220 .

The battery cluster 200 also includes a plurality of thermal conductive members 260 disposed on the vapor chamber 220 , and each thermal conductive member 260 is located between the side surfaces of two adjacent battery cell units of the battery module 232 . The arrangement of the thermal conductive member 260 can enhance the heat dissipation and temperature uniformity of the battery core unit 234 .

In this embodiment, three thermal conductive members 260 are disposed between each two battery cells 234 , and the three thermal conductive members 260 are arranged upper, middle, and lower. It should be noted that the number and arrangement of the heat conductive members 260 are not limited to the above situations and can be set according to actual needs.

Further, the connecting member 242 is in a tubular shape, and its number can be increased or decreased according to the heat dissipation requirements. The connecting piece 242 can be disposed in communication with the internal space of the temperature equalizing plate 220 .

Please refer to Figures 7 to 9. Figure 7 shows a schematic structural diagram of the energy storage device behind a hidden box in another embodiment of the present application. Figure 8 shows a front view of the battery cluster of the energy storage device in Figure 7. Figure 9 shows a top view of the battery cluster in FIG. 8 . Compared with the energy storage device 100 in the above embodiment, the energy storage device 100 in this embodiment adopts a different heat dissipation structure 240 . The top of the vapor chamber 220 protrudes from the top of the battery module 232 . The heat dissipation structure 240 includes a connection part 244 and a plurality of heat dissipation fins 241. The connection part 244 is provided on the top of the two vapor chambers 220. The plurality of heat dissipation fins 241 is provided on the top of the connection part 244 and is located in the air supply duct 112. . The connecting portion 244 is provided with a communication hole 245 for connecting the air supply duct 112 and the cooling air duct 222 . Among them, the entire heat dissipation structure 240 is located in the air supply duct 112, which further increases the heat dissipation area, improves the heat dissipation efficiency, and makes the temperature uniformity of the entire system better.

In this embodiment, the top of the temperature equalizing plate 220 is also located in the air supply duct 112. The connecting portion 244 is welded to the top of the two equalizing plates 220. The heat dissipation fins 241 are located on the top of the air supply duct 112 so that cold air can flow. Through the vapor chamber 220, the heat is exchanged more directly with the heat dissipation fins 241.

In this embodiment, the spacing direction D1 of the plurality of heat dissipation fins 241 is perpendicular to the extension direction of the air supply duct 112 , that is, the extension direction of the space formed between adjacent heat dissipation fins 241 is in line with the extension direction of the air supply air duct 112 . The extension directions of the channels 112 are the same, which reduces wind resistance. The cooling airflow flows through the space formed between the heat dissipation fins 241 and takes away the heat in time. It should be noted that "set vertically" can be understood as substantially vertical, and is not limited to a completely vertical situation.

As for other aspects of the energy storage device 100 in this embodiment, they are basically the same as other aspects of the energy storage device 100 in the above embodiment. For details, please refer to the description of the above embodiment and will not be described again here.

Please refer to FIG. 10 , which shows a top view of a battery cluster of an energy storage device in yet another embodiment of the present application. Compared with the spacing arrangement direction D1 of the multiple heat dissipation fins 241 of the battery cluster 200 of the energy storage device 100 in the above embodiment, the multiple heat dissipation fins 241 of the battery cluster 200 in this embodiment adopt a different spacing arrangement direction D2. . Specifically, the spacing direction D2 of the plurality of heat dissipation fins 241 is the same as the extension direction of the air supply duct 112 , and a plurality of spaced guide grooves 246 are formed on the plurality of heat dissipation fins 241 . Each guide groove is 246 penetrates all the heat dissipation fins 241 along the extension direction of the air supply duct 112. The guide grooves 246 can reduce wind resistance and allow the cooling air flow to pass through the heat dissipation fins 241 smoothly along the guide grooves 246.

As for other aspects of the energy storage device 100 in this embodiment, they are basically the same as other aspects of the energy storage device 100 in the above embodiment. For details, please refer to the description of the above embodiment and will not be described again here.

The technical features of the above-described embodiments can be combined in any way. To simplify the description, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, All should be considered to be within the scope of this manual.

The above-described embodiments only express several implementation modes of the present application, and their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of the patent application. It should be noted that, for those of ordinary skill in the art, several modifications and improvements can be made without departing from the concept of the present application, and these all fall within the protection scope of the present application. Therefore, the protection scope of this patent application should be determined by the appended claims.

Claims (10)

1. A battery cluster, comprising:

the top of the cluster frame is provided with an air supply duct which is used for inputting cooling air flow;

a temperature equalizing plate;

the module units are arranged on the cluster frame, each module unit comprises at least two parallel battery core modules, the temperature equalizing plates are connected between two adjacent battery core modules, and the temperature equalizing plates are arranged at intervals and form a heat dissipation air duct; and

the heat dissipation structure is connected with the temperature equalization plate, the heat dissipation structure is provided with a plurality of heat dissipation fins, at least part of the heat dissipation fins are exposed in the air supply duct, and the air supply duct and the heat dissipation duct are communicated through a spacing space formed among the heat dissipation fins.

2. The battery cluster of claim 1 wherein the battery cells are connected in series,

the top of the temperature equalizing plate protrudes out of the top of the battery cell module;

the heat radiation structure comprises a connecting part and a plurality of heat radiation fins, wherein the connecting part is arranged at the top of the two temperature equalization plates, the plurality of heat radiation fins are arranged at the top of the connecting part and are positioned in the air supply duct, the connecting part is provided with a communication hole, and the communication hole is used for communicating the air supply duct and the heat radiation duct.

3. The battery pack according to claim 2, wherein the plurality of heat radiation fins are arranged at intervals in a direction perpendicular to the extending direction of the air supply duct.

4. The battery pack according to claim 2, wherein a plurality of the heat radiation fins are arranged at intervals in the same direction as the extending direction of the air supply duct, a plurality of the spaced diversion trenches are formed in the plurality of the heat radiation fins, and each diversion trench penetrates through all the heat radiation fins along the extending direction of the air supply duct.

5. The battery pack according to claim 1, wherein the heat dissipation structure comprises a plurality of connecting members and a plurality of heat dissipation fins, the plurality of connecting members are connected between the two temperature equalizing plates, the plurality of heat dissipation fins are arranged on the plurality of connecting members at intervals and are arranged at intervals with the two temperature equalizing plates, and the plurality of heat dissipation fins are formed at the tops of the plurality of heat dissipation fins.

6. The battery cluster of any one of claims 1 to 5, further comprising:

the heat conducting pieces are arranged on the temperature equalizing plate, and each heat conducting piece is located between the side faces of two adjacent battery core units of the battery core module.

7. The battery pack according to any one of claims 1 to 5, wherein the side surfaces of two adjacent cell modules are connected to the side surfaces of the temperature equalizing plate through a heat conductive structural adhesive.

8. An energy storage device, comprising:

a case;

a battery cluster, wherein the battery cluster is arranged in the box body, and the battery cluster is the battery cluster according to any one of claims 1 to 7; and

the refrigerating equipment is arranged on the box body, and an air supply port of the refrigerating equipment is communicated with the air supply duct of the battery cluster.

9. The energy storage device of claim 8, wherein the energy storage device comprises a housing,

one end of the air supply duct, which is far away from the air supply port, is closed;

an air outlet channel is arranged between the bottom of the battery cluster and the bottom of the box body, and the air outlet channel is communicated with the heat dissipation channel of the battery cluster and the air outlet of the refrigeration equipment.

10. An energy storage device, comprising:

a case;

a battery cluster, wherein the battery cluster is arranged in the box body, and the battery cluster is the battery cluster according to claim 5; and

the refrigerating equipment is arranged on the box body, and an air supply port of the refrigerating equipment is communicated with the air supply duct;

the top surfaces of the radiating fins and the temperature equalizing plate are flush with the inner surface of the bottom wall of the air supply duct.