Battery cell modules, battery packs and energy storage devices

Abstract

This application relates to the field of battery thermal management technology and provides a cell module, a battery pack, and an energy storage device. The cell module of this application includes a cold plate, a cell assembly and a heat-conducting portion disposed on the cold plate; the heat-conducting portion includes a shell with a cavity, a cooling evaporator filled in the cavity, and a capillary layer disposed inside the shell; the shell has a first portion abutting against the side of the cell assembly, and a second portion abutting against a busbar assembly at the top of the cell assembly, the bottom of the first portion being located near the cold plate, and the inner cavity of the first portion and the inner cavity of the second portion communicating; the cooling evaporator located in the second portion can evaporate and absorb heat at the busbar, and after vaporization, flow to the lower-temperature first portion to release heat and liquefy, and the capillary layer can guide the cooling evaporator in the first portion back to the second portion. This application, through the arrangement of the cell module, can cool the busbar assembly, thereby improving the performance of the battery pack.

Description

Technical Field

[0001] This application relates to the field of battery pack technology, and in particular to a cell module, battery pack and energy storage device. Background Technology

[0002] With the rapid development of the new energy vehicle industry, the number of electric vehicles on the road is gradually increasing. To improve the charging speed of electric vehicles, high-rate charging technology is often used in the industry. However, the increase in charging power exacerbates the problem of cell temperature rise. As the core component for current transmission in the battery module, the busbar assembly experiences a rapid temperature rise during high-rate charging. This rapid temperature rise in the busbar can cause the temperature of adjacent cells to rise as well, posing a risk of thermal runaway and negatively impacting the quality of the battery pack. Utility Model Content

[0003] In view of this, this application aims to propose a cell module to facilitate cooling of the bus assembly and improve the performance of the battery pack.

[0004] To achieve the above objectives, the technical solution of this application is implemented as follows:

[0005] A battery cell module includes a cold plate, and a battery cell assembly and a heat-conducting part disposed on the cold plate;

[0006] The heat-conducting part includes a shell with a cavity, a cooling evaporator filled in the cavity, and a capillary layer disposed on the inner wall of the shell;

[0007] The housing has a first portion that abuts against the side of the battery cell assembly and a second portion that abuts against the busbar assembly at the top of the battery cell assembly. The bottom of the first portion is located near the cold plate, and the inner cavity of the first portion and the inner cavity of the second portion are connected to form the cavity.

[0008] The cooling evaporator located in the second part can evaporate and absorb heat at the manifold assembly, and after vaporization, flow to the first part with a lower temperature to release heat and liquefy, and the capillary layer can guide the cooling evaporator located in the first part to flow back to the second part.

[0009] Furthermore, the battery cell assembly comprises at least two sets arranged side-by-side along the first direction; the heat-conducting portion is provided between the two battery cell assemblies, or the heat-conducting portion is provided on the outer side of each battery cell assembly along the first direction.

[0010] Furthermore, a heat-conducting portion is provided between the two battery cell groups; the first part and the second part of the heat-conducting portion are T-shaped and along the first direction, the first part is attached to the inner side of both battery cell groups, and the second part is attached to each busbar assembly.

[0011] Furthermore, each of the battery cell groups is provided with a heat-conducting portion on its outer side; the first portion and the second portion of each heat-conducting portion are L-shaped, and the first portion is attached to the outer side of the corresponding battery cell group, and the second portion is attached to the corresponding busbar assembly.

[0012] Furthermore, the battery cell assembly comprises at least two sets arranged side-by-side along a first direction; along the first direction, the heat-conducting portion is provided between the two battery cell assemblies and on the outer side of each battery cell assembly.

[0013] Furthermore, each of the battery cell groups includes a plurality of battery cells arranged sequentially along the second direction, and the bus assembly includes a plurality of bus units spaced apart along the first direction. The plurality of battery cells are electrically connected through each of the bus units. In the heat-conducting portion between two battery cell groups, the first portion and the second portion are T-shaped, and along the first direction, the first portion is attached to the inner side of both battery cell groups, and the second portion is attached to the two adjacent bus units. In the heat-conducting portion on the outer side of each battery cell group, the first portion and the second portion are L-shaped, and the first portion is attached to the outer side of the corresponding battery cell group, and the second portion is attached to the corresponding bus unit. The second direction is perpendicular to the first direction.

[0014] Furthermore, the capillary layer is made using a liquid-absorbing core.

[0015] Furthermore, the housing is made of a thermally conductive material; and / or, the housing abuts against the bottom of the first portion.

[0016] Compared with the prior art, this application has the following advantages:

[0017] (1) The battery cell module described in this application can cool the battery cell assembly on the cold plate by setting the cold plate. By setting the first part and the second part of the heat-conducting part, heat can be transferred between the bus assembly and the cold plate, thereby cooling the bus assembly. By setting the cavity of the heat-conducting part, the cooling evaporator and the capillary structure layer set in the cavity, the cooling evaporator can absorb heat and vaporize near the second part of the bus assembly, and under the action of pressure, it flows to the first part near the cold plate and releases heat and liquefies. Through the capillary action of the capillary structure layer, it flows back to the second part through the capillary structure layer and repeats the process of absorbing heat and vaporizing and releasing heat and liquefying, thereby facilitating the cooling of the bus assembly and helping to improve the quality of the battery pack.

[0018] (2) By arranging two sets of battery cells side by side along the first direction, it is easy to improve the energy density of the battery pack. Furthermore, by setting heat-conducting parts between or outside the battery cells, it is beneficial to enhance the cooling effect on the battery cells while improving the cooling effect on the busbar assembly, which is conducive to design and implementation.

[0019] (3) The first and second parts of the heat-conducting part are arranged in a T-shape, which facilitates the arrangement of the heat-conducting part between the two battery cells and improves the cooling effect of the area between the two battery cells, which is beneficial to the design and implementation.

[0020] (4) The first and second parts of the heat-conducting part are arranged in an L-shape, which facilitates the arrangement of the heat-conducting part on the outside of the two battery cells and improves the cooling effect on the outside of the two battery cells, which is conducive to design and implementation.

[0021] (5) By arranging two sets of battery cells side by side along the first direction, it is easy to improve the energy density of the battery pack. By setting heat-conducting parts between the two battery cells and on the outside of each battery cell, it is easy to improve the cooling effect on the busbar assembly and the cooling effect on the two battery cells, which is conducive to design and implementation.

[0022] (6) The first and second parts of the heat-conducting part located between the two battery cells are arranged in a T-shape, which facilitates the arrangement of the heat-conducting part between the two battery cells and improves the cooling effect of the area between the two battery cells. The first and second parts of the heat-conducting part located outside the two battery cells are arranged in an L-shape, which facilitates the arrangement of the heat-conducting part outside the two battery cells and improves the cooling effect of the outside of the two battery cells, which is conducive to design and implementation.

[0023] (7) The capillary structure layer is made of liquid-absorbing core, which is convenient for processing and manufacturing and facilitates design and implementation.

[0024] (8) The housing is made of thermally conductive material, which helps to improve the heat transfer efficiency between the thermally conductive part, the busbar assembly and the battery cell, and makes the cold plate abut against the bottom of the first part, which facilitates the improvement of the heat transfer efficiency between the cold plate and the thermally conductive part, and is conducive to design and implementation.

[0025] This application also proposes a battery pack including the cell module described above.

[0026] This application also proposes an energy storage device, wherein the energy storage device is provided with a battery pack as described above.

[0027] The battery pack and energy storage device described in this application have the same beneficial effects as the battery cell module described above compared to the prior art, so they will not be described again here. Attached Figure Description

[0028] The accompanying drawings, which form part of this application, are used to provide a further understanding of this application. The illustrative embodiments and descriptions of this application are used to explain this application and do not constitute an undue limitation of this application. In the drawings:

[0029] Figure 1 This is a schematic diagram of an exemplary embodiment of the battery cell module described in this application.

[0030] Figure 2 This is a partial structural diagram from a first angle of an exemplary embodiment of the battery cell module described in this application.

[0031] Figure 3 This is a schematic diagram of the structure of the heat-conducting part of an exemplary embodiment of the battery cell module described in this application.

[0032] Figure 4 This is a schematic diagram of the internal structure of an exemplary embodiment of the battery cell module described in this application.

[0033] Figure 5 for Figure 4 Enlarged view of point A;

[0034] Figure 6 This is a schematic diagram of another exemplary embodiment of the battery cell module described in this application.

[0035] Figure 7 This is a schematic diagram of the structure of the heat-conducting part of another exemplary embodiment of the battery cell module described in this application.

[0036] Figure 8 This is a schematic diagram of another exemplary embodiment of the battery cell module described in this application.

[0037] Figure 9 This is a schematic diagram of the structure of the heat-conducting part in another exemplary embodiment of the battery cell module described in this application.

[0038] Explanation of reference numerals in the attached figures:

[0039] 1. Cold-rolled steel plate;

[0040] 2. Battery cell assembly;

[0041] 201. Battery cell;

[0042] 3. Heat-conducting parts;

[0043] 301. Shell; 302. Capillary layer;

[0044] 3011. Part One; 3012. Part Two;

[0045] 4. Busbar assembly;

[0046] 401, Busbar Unit; 4011, Busbar;

[0047] S, cavity. Detailed Implementation

[0048] To make the technical solution and advantages of this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the scope of this application.

[0049] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other.

[0050] Furthermore, it should be noted that in the description of this application, if terms such as "upper," "lower," "inner," or "outer" appear, indicating orientation or positional relationship, these are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on this application. In addition, if terms such as "first" or "second" appear, they are also used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0051] Furthermore, in the description of this application, unless otherwise expressly defined, the terms "installation," "connection," "joining," and "connector" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this application in light of the specific circumstances.

[0052] In this application, the terms "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to a specific feature, structure, material, or characteristic described in connection with that embodiment or example, which is included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0053] The present application will now be described in detail through exemplary embodiments. However, it should be understood that, without further description, elements, structures, and features in one embodiment may be advantageously incorporated into other embodiments.

[0054] The first aspect of this application provides a cell 201 module, which is applied in a battery pack and is mainly used as an energy storage module in the battery pack. The cell 201 module of this embodiment, with its innovative structural design, can cool the bus assembly 4, reduce the probability of thermal runaway of the cell 201, and thus improve the quality of the battery pack.

[0055] In existing technologies, as the number of electric vehicles on the road gradually increases, high-rate charging technology is often used to improve the charging speed of electric vehicles. This technology increases the charging rate by increasing the current and voltage during the charging process. During high-rate charging, the input of high voltage and high current causes the temperature of the busbar assembly 4 inside the battery pack to rise sharply.

[0056] During this process, the busbar assembly 4 is generally far from the cold plate 1, making it difficult to cool under the cooling effect of the cold plate 1. As the temperature of the busbar assembly 4 rises sharply, the temperature of the battery cell 201 connected to the busbar assembly 4 also rises due to heat transfer. When the temperature of the battery cell 201 rises, there is a risk of thermal runaway, which makes the charging process somewhat dangerous. Therefore, it also limits the current and voltage range of high-rate charging, which is not conducive to improving the quality of the battery pack.

[0057] In view of this, in order to overcome the shortcomings of the prior art, in the battery cell 201 module of this embodiment, combined with Figures 1 to 5 As shown, the overall design includes a cold plate 1, a battery cell assembly 2, and a heat-conducting part 3.

[0058] The battery cell assembly 2 and the heat-conducting part 3 are both located on the cold plate 1. The heat-conducting part 3 includes a housing 301, a cooling evaporator, and a capillary structure layer 302. The housing 301 has a cavity S, which is filled with the cooling evaporator. The capillary structure layer 302 is located on the inner wall of the housing 301.

[0059] The housing 301 has a first part 3011 that abuts against the side of the battery cell assembly 2, and a second part 3012 that abuts against the busbar assembly 4 at the top of the battery cell assembly 2. The bottom of the first part 3011 is located near the cold plate 1, and the inner cavity of the first part 3011 and the inner cavity of the second part 3012 are connected to form the cavity S.

[0060] The cooling evaporator located in the second part 3012 can evaporate and absorb heat at the manifold assembly 4, and after vaporization, it flows to the first part 3011 with a lower temperature to release heat and liquefy. The capillary structure layer 302 can guide the cooling evaporator located in the first part 3011 to flow back to the second part 3012.

[0061] Therefore, the cold plate 1 can cool the battery cell assembly 2 mounted on it. The first part 3011 and the second part 3012 of the heat-conducting part 3 can transfer heat between the busbar assembly 4 and the cold plate 1, thereby cooling the busbar assembly 4. The cavity S of the heat-conducting part 3, the cooling evaporator, and the capillary layer 302 disposed in the cavity S allow the cooling evaporator to absorb heat and vaporize near the second part 3012 of the busbar assembly 4, and under pressure, flow to the first part 3011 near the cold plate 1 to release heat and liquefy. Through the capillary action of the capillary layer 302, it flows back to the second part 3012 and repeats the process of absorbing heat and vaporizing and releasing heat and liquefying, thus facilitating the cooling of the busbar assembly 4 and helping to improve the quality of the battery pack.

[0062] Based on the above overall introduction, specifically, as an exemplary structural form, for the battery cell assembly 2 in this embodiment, further combining... Figures 1 to 4 As shown, it generally includes at least two groups arranged side by side along a first direction.

[0063] In specific implementation, the above-mentioned cold plate 1 generally includes a main body and a flow channel located in the main body. The main body is provided with an inlet and an outlet that communicate with the flow channel. The arrangement of the flow channel can refer to the conventional arrangement in the existing cold plate 1 (such as a serpentine coiling form), which will not be described in detail here.

[0064] The above-mentioned cell assembly 2 generally includes several cells 201 stacked sequentially along a second direction. Each cell 201 is electrically connected via a bus assembly 4. The bus assembly 4, acting as a connector for the cells 201, includes multiple bus units 401 arranged along a first direction. Each cell assembly 2 has two bus units 401. Each bus unit 401 typically includes multiple busbars 4011, which are connected to the terminals of adjacent cells 201 to connect the cells 201 into the cell assembly 2. The connection method between the cells 201 and the bus assembly 4 can refer to conventional connection methods in existing cell 201 modules (such as soldering), and will not be elaborated further here.

[0065] It is worth noting that in actual implementation, the aforementioned cell 201 and bus 4011 can also be derived from the relevant structures in existing battery packs, and will not be elaborated further here. Furthermore, the second direction is perpendicular to the first direction.

[0066] Continue to combine Figures 1 to 5As shown, the first part 3011 of the heat-conducting part 3 abuts against the side of the battery cell assembly 2, and its bottom is positioned close to the cold plate 1. The second part 3012 abuts against the busbar assembly 4 at the top of the battery cell assembly 2. During charging or other events that cause the busbar assembly 4 to heat up, the cooling evaporator in the capillary layer 302 located in the second part 3012 near the busbar assembly 4 is heated and vaporized through heat transfer from the housing 301, becoming a gaseous cooling evaporator. This gaseous evaporator then leaves the capillary layer 302 and enters the inner cavity of the second part 3012, causing the inner cavity pressure of the second part 3012 to increase. At this time, compared to the inner cavity of the second part 3012, the inner cavity of the first part 3011 has a lower temperature due to its proximity to the cold plate 1. The gaseous cooling evaporator releases heat and liquefies, resulting in a lower inner cavity pressure in the first part 3011. This creates a pressure difference between the inner cavity of the second part 3012 and the inner cavity of the first part 3011.

[0067] Meanwhile, utilizing the pressure difference formed between the second part 3012 and the first part 3011, the gaseous cooling evaporator located in the inner cavity of the second part 3012 flows to the inner cavity of the first part 3011 under the action of the pressure difference. Through the capillary structure layer 302 on the inner wall of the shell 301, the cooling evaporator that releases heat and liquefies at the bottom of the first part 3011 under capillary action flows back to the second part 3012 through the capillary structure layer 302. It is heated up and vaporized again through the heat transfer of the shell 301. Through the cycle of cooling evaporator absorbing heat and vaporizing and releasing heat and liquefying, the heat of the manifold assembly 4 can be conducted to the cold plate 1, thereby completing the cooling of the manifold 4011.

[0068] It is worth mentioning that the cooling evaporator can also cool the cell group 2 to a certain extent during the cycle of heat absorption vaporization and heat release liquefaction, thereby improving the cooling effect of cell 201 and thus helping to improve the quality of the battery pack.

[0069] In practical implementation, the capillary layer 302 can be made using a wick, for example, for ease of manufacturing. The housing 301 can be made using a thermally conductive material (such as a metal or non-metal material with high thermal conductivity), which helps to improve the heat transfer efficiency between the heat-conducting part 3, the busbar assembly 4, and the battery cell 201. The bottom of the first part 3011 of the housing 301 can, for example, abut against the cold plate 1 to further improve the heat transfer efficiency between the heat-conducting part 3 and the cold plate 1. Of course, besides using a wick to make the capillary layer 302 and using a thermally conductive material to make the housing 301, the capillary layer 302 and the housing 301 can be adapted and adjusted, as long as they can achieve the capillary action of the capillary layer 302 and the thermal conductivity of the housing 301.

[0070] Continue to combine Figures 1 to 5As shown, in some exemplary embodiments, this embodiment may, for example, provide a heat-conducting portion 3 between the two battery cell groups 2 and on the outside of each battery cell group 2 along a first direction, and the first portion 3011 and the second portion 3012 of the heat-conducting portion 3 between the two battery cell groups 2 are T-shaped, while the first portion 3011 and the second portion 3012 of the heat-conducting portion 3 on the outside of each battery cell group 2 are L-shaped.

[0071] Furthermore, along the first direction, the first portion 3011 of the heat-conducting part 3 located between the two battery cell groups 2 is bonded to the inner side of both battery cell groups 2, and the second portion 3012 is bonded to the two adjacent busbar units 401. The first portion 3011 of the conductive part located on the outer side of each battery cell group 2 is bonded to the outer side of the corresponding battery cell group 2, and the second portion 3012 is bonded to the corresponding busbar unit 401.

[0072] At this time, the first part 3011 and the second part 3012 of the heat-conducting part 3 located between the two battery cell groups 2 are arranged in a T-shape, which facilitates the arrangement of the heat-conducting part 3 between the two battery cell groups 2 and improves the cooling effect of the area between the two battery cell groups 2. The first part 3011 and the second part 3012 of the heat-conducting part 3 located on the outside of the two battery cell groups 2 are arranged in an L-shape, which facilitates the arrangement of the heat-conducting part 3 on the outside of the two battery cell groups 2. By providing heat-conducting parts 3 between the two battery cell groups 2 and on the outside of each battery cell group 2, it is convenient to improve the cooling effect of the busbar assembly 4 and the cooling effect of the two battery cell groups 2, which is beneficial to the design and implementation.

[0073] It is worth mentioning that when the heat-conducting part 3 and the battery cell assembly 2 are connected, for example, thermally conductive adhesive can be used for bonding.

[0074] In some of the exemplary implementations, combined with Figure 6 and Figure 7 As shown, in this embodiment, a heat-conducting part 3 can be provided between the two battery cell groups 2, and the first part 3011 and the second part 3012 of the heat-conducting part 3 are T-shaped. Along the first direction, the first part 3011 is attached to the inner side of both battery cell groups 2, and the second part 3012 is attached to each busbar assembly 4. The T-shaped arrangement of the first part 3011 and the second part 3012 of the heat-conducting part 3 facilitates the arrangement of the heat-conducting part 3 between the two battery cell groups 2. By providing the heat-conducting part 3 between the battery cell groups 2, it is beneficial to improve the cooling effect on the busbar assembly 4 while enhancing the cooling effect on the battery cell group 2, which is beneficial for design and implementation.

[0075] In some of the exemplary implementations, combined with Figure 8 and Figure 9As shown, in this embodiment, for example, each cell assembly 2 may have a heat-conducting part 3 on its outer side, and the first part 3011 and the second part 3012 of each heat-conducting part 3 are L-shaped. The first part 3011 is attached to the outer side of the corresponding cell assembly 2, and the second part 3012 is attached to the corresponding busbar assembly 4. The L-shaped arrangement of the first part 3011 and the second part 3012 of the heat-conducting part 3 facilitates the arrangement of the heat-conducting part 3 on the outer side of the two cell assemblies 2. By providing the heat-conducting part 3 on the outer side of each cell assembly 2, it is beneficial to improve the cooling effect on the busbar assembly 4 while enhancing the cooling effect on the cell assembly 2, which is beneficial for design and implementation.

[0076] In addition, it should be noted that the above-mentioned heat-conducting part 3 can provide a certain structural strength to the battery cell 201 in the battery cell 201 module, which is beneficial to protect the terminal and bus 4011.

[0077] In some exemplary embodiments, this embodiment may, for example, provide a plurality of partitions within the heat-conducting part 3, with each partition spaced apart along the second direction within the first portion 3011 of the heat-conducting part 3, thereby dividing the first portion 3011 of the heat-conducting part 3 into a plurality of cooling regions. The partitions are also provided with capillary structure layers 302, thereby increasing the area of ​​the capillary structure layers 302 within the heat-conducting part 3, which is beneficial to better improve the heat conduction efficiency of the heat-conducting part 3.

[0078] Understandably, the number of baffles can be adjusted adaptively according to the cooling effect of cold plate 1, as long as it can ensure the circulation of the cooling evaporator through heat absorption vaporization and heat release liquefaction.

[0079] It is worth noting that, regarding the battery cell 201 module of this embodiment, based on the above exemplary embodiments, in specific implementation, as a preferred embodiment, it is still... Figures 1 to 9 As shown, it may include, for example, a cold plate 1, a battery cell assembly 2, a heat-conducting part 3, and a bus assembly 4.

[0080] Among them, the battery cell group 2 is disposed on the cold plate 1, and the end of the battery cell group 2 away from the cold plate 1 is provided with a busbar assembly 4. The battery cell group 2 consists of two side by side along the first direction, and includes a number of battery cells 201 stacked sequentially along the second direction. Each battery cell 201 is electrically connected through the busbar assembly 4.

[0081] The bus assembly 4 includes four bus units 401 arranged along the first direction. Each group of battery cells 2 is provided with two bus units 401. Each bus unit 401 includes multiple busbars 4011, which are respectively connected to the terminals of two adjacent battery cells 201.

[0082] The heat-conducting part 3 is arranged between the two battery cell groups 2 and along the outer side of each battery cell group 2. The first part 3011 and the second part 3012 of the heat-conducting part 3 located between the two battery cell groups 2 are T-shaped, while the first part 3011 and the second part 3012 of the heat-conducting part 3 located on the outer side of each battery cell group 2 are L-shaped. The first part 3011 of the conductive part abuts against the side wall of the battery cell group 2, and the second part 3012 of the conductive part abuts against the busbar assembly 4. The conductive part is bonded to the battery cell group 2 with conductive adhesive.

[0083] In the preferred embodiment of the above-mentioned cell 201 module, the specific configuration and arrangement of the cold plate 1, bus unit 401, and heat-conducting part 3 can still be referred to the descriptions in the above-mentioned exemplary embodiments. Furthermore, in this preferred embodiment, the beneficial effects brought about by the design of the cold plate 1, bus unit 401, and heat-conducting part 3 can also be referred to the descriptions in the above-mentioned exemplary embodiments.

[0084] In this embodiment, the cell 201 module adopts the above design. Through the setting of the heat-conducting part 3, the heat of the busbar assembly 4 is conducted to the cold plate 1 through the cycle of heat absorption vaporization and heat release liquefaction of the cooling evaporator in the first part 3011 and the second part 3012, thereby cooling the busbar assembly 4. It can also provide a certain structural strength to the cell 201 in the cell 201 module, which is beneficial to protect the terminal and the busbar 4011, and helps to improve the quality of the battery pack.

[0085] An embodiment of the second aspect of this application provides a battery pack in which a cell 201 module as described above is disposed.

[0086] In the battery pack of this embodiment, the above-mentioned cell 201 module serves as an energy storage unit in the battery pack. It is generally connected to the battery management system in the battery pack, and the battery management system controls the charging and power output of the cell 201 module.

[0087] The battery pack of this embodiment, by setting the cell 201 module as described above, can meet a higher charging rate during battery pack charging, thereby improving the charging efficiency of the battery pack and thus improving the quality of battery pack use.

[0088] An embodiment of the third aspect of this application provides an energy storage device in which a battery pack as described above is provided.

[0089] In the energy storage device of this embodiment, the battery pack serves as an energy storage component and is generally connected to the energy management system of the energy storage device. The energy management system controls the power output of the battery pack.

[0090] The energy storage device of this embodiment, by setting the battery pack as described above, can use a higher charging rate, which helps to reduce charging time, thereby improving the efficiency of the energy storage device and enhancing its quality of use.

[0091] The above descriptions are merely some embodiments of this application and are not intended to limit this application. The technical features or structures in the foregoing different embodiments can be arbitrarily combined to form other specific technical solutions as needed. For those skilled in the art, this application can have various modifications and variations. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the scope of protection of the claims of this application.

Claims

1. A battery cell module, characterized in that: Includes a cold plate, and a battery cell assembly and a heat-conducting part disposed on the cold plate; The heat-conducting part includes a shell with a cavity, a cooling evaporator filled in the cavity, and a capillary layer disposed on the inner wall of the shell; The housing has a first portion that abuts against the side of the battery cell assembly and a second portion that abuts against the busbar assembly at the top of the battery cell assembly. The bottom of the first portion is located near the cold plate, and the inner cavity of the first portion and the inner cavity of the second portion are connected to form the cavity. The cooling evaporator located in the second part can evaporate and absorb heat at the manifold assembly, and after vaporization, flow to the first part with a lower temperature to release heat and liquefy, and the capillary layer can guide the cooling evaporator located in the first part to flow back to the second part.

2. The cell module according to claim 1, characterized in that: The battery cell assembly consists of at least two assemblies arranged side-by-side along a first direction; The heat-conducting part is provided between the two battery cell groups, or the heat-conducting part is provided on the outer side of each battery cell group along the first direction.

3. The cell module according to claim 2, characterized in that: The heat-conducting part is provided between the two battery cell groups; The first and second portions of the heat-conducting part are T-shaped and along the first direction, the first portion is attached to the inner side of both of the battery cell groups, and the second portion is attached to each of the busbar assemblies.

4. The cell module according to claim 2, characterized in that: The heat-conducting part is provided on the outer side of each of the aforementioned battery cell assemblies; The first part and the second part of each of the heat-conducting parts are L-shaped, and the first part is attached to the outer side of the corresponding battery cell assembly, and the second part is attached to the corresponding busbar assembly.

5. The cell module according to claim 1, characterized in that: The battery cell assembly consists of at least two assemblies arranged side-by-side along a first direction; Along the first direction, the heat-conducting part is provided between the two battery cell groups and on the outside of each battery cell group.

6. The cell module according to claim 5, characterized in that: Each of the battery cell groups includes a plurality of battery cells arranged sequentially along the second direction, and the bus assembly includes a plurality of bus units arranged at intervals along the first direction, and the plurality of battery cells are electrically connected through each of the bus units; In the heat-conducting portion between the two battery cell groups, the first portion and the second portion are T-shaped and along the first direction, the first portion is attached to the inner side of both battery cell groups, and the second portion is attached to the two adjacent busbar units. In the heat-conducting portion on the outside of each of the battery cell groups, the first portion and the second portion are L-shaped, and the first portion is attached to the outside of the corresponding battery cell group, and the second portion is attached to the corresponding busbar unit. Wherein, the second direction is perpendicular to the first direction.

7. The cell module according to any one of claims 1 to 6, characterized in that: The capillary layer is made of a liquid-absorbing core.

8. The cell module according to any one of claims 1 to 6, characterized in that: The housing is made of a thermally conductive material; and / or, The cold plate abuts against the bottom of the first part.

9. A battery pack, characterized in that: The battery cell module includes any one of claims 1 to 8.

10. An energy storage device, characterized in that: The energy storage device includes the battery pack as described in claim 9.

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