Cold plate, battery cluster, and energy storage system

Abstract

This application relates to the field of energy storage equipment technology and provides a cold plate, a battery cluster, and an energy storage system. The cold plate of this application is used between two layers of battery cell modules. The cold plate includes a flow channel plate and a first substrate and a second substrate disposed on the flow channel plate. The first substrate and the second substrate are respectively disposed on opposite sides of the flow channel plate in the thickness direction. The first substrate abuts against the upper battery cell module, and the second substrate abuts against the lower battery cell module. A first flow channel is provided between the first substrate and the flow channel plate, and a second flow channel is provided between the second substrate and the flow channel plate. A first liquid inlet / outlet assembly communicating with the first flow channel is provided on the first substrate, and a second liquid inlet / outlet assembly communicating with the second flow channel is provided on the second substrate. The cold plate of this application improves the cooling efficiency of the two-layer battery cell module, thereby enhancing the performance of the energy storage system.

Description

Technical Field

[0001] This application relates to the field of energy storage technology, and in particular to a cold plate, a battery cluster and an energy storage system. Background Technology

[0002] With the development of new energy technologies, energy storage systems are being used more and more. Energy storage systems are new energy devices that integrate a large number of battery cell modules into battery clusters and arrange these clusters in cabinets or containers to perform functions such as peak shaving and valley filling, and frequency regulation.

[0003] In energy storage systems, battery cell modules generate a significant amount of heat during operation, necessitating a cooling system to lower their temperature. Common technologies utilize a cold plate arrangement between two battery cell modules for cooling. However, existing cold plates typically consist of only a single-layer flow channel, resulting in low heat exchange efficiency and poor cooling performance when cooling dual-layer modules, thus hindering the improvement of the energy storage system's performance. Utility Model Content

[0004] In view of this, this application aims to propose a cold plate to improve the quality of use of energy storage systems.

[0005] To achieve the above objectives, the technical solution of this application is implemented as follows: A cold plate is used between two layers of battery cell modules, including a flow channel plate and a first substrate and a second substrate disposed on both sides of the flow channel plate in the thickness direction. A first flow channel is provided between the flow channel plate and the first substrate. A first liquid inlet / outlet assembly communicating with the first flow channel is provided on the first substrate, and the first substrate is used to abut against the upper battery cell module. A second flow channel is provided between the flow channel plate and the second substrate. A second liquid inlet / outlet assembly communicating with the second flow channel is provided on the second substrate, and the second substrate is used to abut against the lower layer of the battery cell module.

[0006] Furthermore, a plurality of first flow channel grooves are recessed on the side of the flow channel plate facing the first substrate, so as to form a protrusion corresponding to each of the first flow channel grooves on the side of the flow channel plate facing the second substrate; the first substrate covers each of the first flow channel grooves to form the first flow channel; a second flow channel groove is formed between two adjacent protrusions, and the second substrate covers the second flow channel groove to form the second flow channel.

[0007] Furthermore, along the length direction of the cold plate, one side of the first substrate, the second substrate, and the flow channel plate is provided with a protrusion; the first liquid inlet / outlet assembly is disposed on the protrusion of the first substrate, and the second liquid inlet / outlet assembly is disposed on the protrusion of the second substrate.

[0008] Furthermore, the first liquid inlet / outlet assembly includes a first liquid inlet connector and a first liquid outlet connector disposed on the first substrate; the second liquid inlet / outlet assembly includes a second liquid inlet connector and a second liquid outlet connector disposed on the second substrate.

[0009] Furthermore, the first flow channel and the second flow channel are configured with the same or opposite flow directions.

[0010] Furthermore, the first flow channel is provided with a flow regulating part, which can shrink in volume when the temperature rises to increase the flow rate in the first flow channel, and increase in volume when the temperature falls to reduce the flow rate in the first flow channel; and / or, the second flow channel is provided with a flow regulating part, which can shrink in volume when the temperature rises to increase the flow rate in the second flow channel, and increase in volume when the temperature falls to reduce the flow rate in the second flow channel.

[0011] Furthermore, the flow regulating part includes an elastomer and an regulating unit disposed in the inner cavity of the elastomer, the regulating unit being made of zirconium tungstate.

[0012] Furthermore, the flow regulating part is glued to both the first flow channel and the second flow channel.

[0013] Compared with related technologies, this application has the following advantages: (1) The cold plate described in this application, through the arrangement of a first substrate, a second substrate and a flow channel plate, has a first flow channel between the first substrate and the flow channel plate, and a second flow channel between the second substrate and the flow channel plate, forming a double-layer flow channel structure. The first substrate is used to abut against the upper battery cell module, and the second substrate is used to abut against the lower battery cell module. Thus, the upper battery cell module and the lower battery cell module can be cooled respectively through the double-layer flow channel structure. Through the arrangement of the first inlet and outlet liquid assembly and the second inlet and outlet liquid assembly, the coolant in the first flow channel and the second flow channel can be adjusted respectively, which is convenient to adjust the heat exchange rate of the first flow channel and the second flow channel, which is beneficial to improve the cooling effect of the cold plate and thus helps to improve the quality of use of the energy storage system.

[0014] (2) By forming a first flow channel groove inward on one side of the flow channel plate facing the first substrate, it is convenient to form a second flow channel groove on the other side of the flow channel plate. The sealing of the corresponding flow channel groove by the first substrate and the second substrate facilitates the setting of the first flow channel and the second flow channel. The structure is simple, easy to process, and helpful for design and implementation.

[0015] (3) The protrusion facilitates the arrangement of the first liquid inlet / outlet assembly and the second liquid inlet / outlet assembly, resulting in a simple structure that is easy to process and manufacture.

[0016] (4) By making the first liquid inlet / outlet assembly and the second liquid inlet / outlet assembly respectively include corresponding liquid inlet connectors and liquid outlet connectors, it is convenient to set up the first liquid inlet / outlet assembly and the second liquid inlet / outlet assembly, and it is convenient to design and implement.

[0017] (5) By setting the flow direction of the first flow channel and the second flow channel to be the same or opposite, it is convenient to set the flow direction of the coolant according to the cooling requirements of the battery cell module, which is conducive to design and implementation.

[0018] (6) By setting flow regulation parts in the first and second flow channels, and the flow regulation parts can expand when cold and contract when hot, it is easy to realize automatic control of coolant flow, improve the utilization rate of coolant, avoid energy waste, and facilitate design and implementation.

[0019] (7) By setting an elastic body with an internal adjustment unit, and the adjustment unit is made of zirconium tungstate, it is convenient to take advantage of the thermal expansion and contraction properties of zirconium tungstate to reduce the volume of the elastic body when the temperature decreases and increase the volume of the elastic body when the temperature increases, thereby facilitating the adjustment of the flow rate of coolant. In addition, the setting of the elastic body is convenient to protect the adjustment unit, so as to ensure the setting effect of the adjustment unit and facilitate the design and implementation.

[0020] (8) By setting the flow regulating part in the first flow channel and the second flow channel in an adhesive form, it is easy to assemble the flow regulating part in the first flow channel and the second flow channel, which facilitates processing and helps design implementation.

[0021] This application also proposes a battery cluster, including multiple cell modules stacked vertically, and a cold plate as described above is provided between two adjacent cell modules.

[0022] This application also proposes an energy storage system, wherein the energy storage system is provided with the battery clusters described above.

[0023] The battery cluster and energy storage system described in this application have the same beneficial effects as the cold plate described above compared to the prior art, so they will not be described again here. Attached Figure Description

[0024] 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: Figure 1 This is a schematic diagram of the structure of the cold plate described in an embodiment of this application; Figure 2 This is a side view of the cold plate described in an embodiment of this application; Figure 3 for Figure 2 Enlarged view of point A in the image; Figure 4This is a schematic diagram of the cold plate assembly between the double-layer battery cell modules as described in the embodiments of this application; Figure 5 This is a cross-sectional view of the cold plate assembly between the double-layer battery cell modules as described in the embodiments of this application; Figure 6 for Figure 5 Enlarged view of point B in the image; Figure 7 This is a schematic diagram of the expansion of the flow regulating unit described in the embodiments of this application; Figure 8 This is a schematic diagram of the scaled-down flow regulation unit described in the embodiments of this application; Explanation of reference numerals in the attached figures: 1. Flow channel plate; 101. First flow channel groove; 102. Protrusion; 103. Second flow channel groove; 2. First substrate; 3. Second substrate; 4. First inlet / outlet liquid assembly; 401. First liquid inlet connector; 402. First liquid outlet connector; 5. Second inlet / outlet liquid assembly; 501, Second liquid inlet connector; 502, Second liquid outlet connector; 6. Protrusion; 7. Flow regulation section; 8. Battery cell module. Detailed Implementation

[0025] 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.

[0026] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other.

[0027] 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.

[0028] 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.

[0029] 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.

[0030] 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.

[0031] An embodiment of the first aspect of this application provides a cold plate for use in the cooling system of an energy storage system, mainly for cooling battery cell modules. The cold plate of this embodiment, with its innovative structural design, can improve the cooling effect of the battery cell modules, thereby improving the quality of use of the energy storage system.

[0032] In related technologies, energy storage systems are new energy devices that integrate a large number of battery cell modules into battery clusters and arrange these clusters in cabinets or containers to perform functions such as peak shaving and valley filling, and frequency regulation. In energy storage systems, the battery cell modules generate a significant amount of heat during operation, necessitating the implementation of cooling systems to reduce their temperature.

[0033] Therefore, the cooling system of an energy storage system typically achieves cooling of the cell module 8 by arranging a cold plate between two cell modules. However, because the cold plate has integrated flow channels, its surface has uneven areas. When assembling the cold plate between the two cell modules, thermally conductive adhesive needs to be filled into these uneven areas to fix the cold plate between the cell modules and ensure its cooling effect. A large amount of thermally conductive adhesive is required during cold plate assembly. In addition, existing cold plates only include a single layer of flow channels, resulting in low heat exchange efficiency and poor cooling effect when cooling batteries in a double-layer module, which is detrimental to improving the performance of the energy storage system.

[0034] In view of this, in order to overcome the shortcomings of related technologies, the cold plate in this embodiment combines... Figures 1 to 6 As shown, in terms of overall design, it is applied between the two-layer battery cell modules 8, including the flow channel plate 1, the first substrate 2 and the second substrate 3.

[0035] The first substrate 2 and the second substrate 3 are disposed on both sides of the flow channel plate 1 in the width direction. A first flow channel is provided between the flow channel plate 1 and the first substrate 2. A first liquid inlet / outlet assembly 4 communicating with the first flow channel is provided on the first substrate 2, and the first substrate 2 is used to abut against the upper battery cell module 8. A second flow channel is provided between the flow channel plate 1 and the second substrate 3. A second liquid inlet / outlet assembly 5 communicating with the second flow channel is provided on the second substrate 3, and the second substrate 3 is used to abut against the lower battery cell module 8.

[0036] Therefore, by setting up the first substrate 2, the second substrate 3, and the flow channel plate 1, a first flow channel is provided between the first substrate 2 and the flow channel plate 1, and a second flow channel is provided between the second substrate 3 and the flow channel plate 1, forming a double-layer flow channel structure. The first substrate 2 is used to abut against the upper battery cell module 8, and the second substrate 3 is used to abut against the lower battery cell module 8. Thus, the upper battery cell module 8 and the lower battery cell module 8 can be cooled respectively through the double-layer flow channel structure. By setting up the first inlet / outlet liquid assembly 4 and the second inlet / outlet liquid assembly 5, the coolant in the first flow channel and the second flow channel can be adjusted respectively, which facilitates the adjustment of the heat exchange rate of the first flow channel and the second flow channel, which is beneficial to improving the cooling effect of the cold plate and thus helps to improve the quality of use of the energy storage system.

[0037] Based on the above overall introduction, specifically, as an exemplary implementation, combined with Figures 1 to 6 As shown, the battery cell module 8 in this embodiment generally includes multiple battery cells stacked together.

[0038] In practical implementation, the individual battery cells are largely in contact with each other. Based on the design requirements of the battery cell module 8, the cells are connected in series or parallel to form the battery cell module 8. The connection methods of the individual cells can be referenced from the existing connection methods in the battery cell module 8 (such as copper busbar connections), and will not be elaborated further here. Similarly, the connection methods between the individual battery cell modules 8 can also be referenced from the existing connection methods between battery cell modules 8, and will not be elaborated further here either.

[0039] Furthermore, in this embodiment, the flow channel plate 1, the first substrate 2, and the second substrate 3 are typically made of metal materials (such as aluminum profiles). The connection method of the flow channel plate 1, the first substrate 2, and the second substrate 3 can also refer to the existing connection methods of cold plates (such as welding methods), and will not be described in detail here.

[0040] Continue to combine Figures 1 to 6As shown, in some exemplary embodiments, for example, in this embodiment, the flow channel plate 1 may be provided with a first flow channel groove 101 and a second flow channel groove 103.

[0041] Among them, on the side of the above-mentioned flow channel plate 1 facing the first substrate 2, a plurality of first flow channel grooves 101 are recessed, and on the side of the flow channel plate 1 facing the second substrate 3, a plurality of protrusions 102 corresponding to the first flow channel grooves 101 are formed. The first substrate 2 covers each first flow channel groove 101 to form a first flow channel, the second flow channel groove 103 is formed between two adjacent protrusions 102, and the second substrate 3 covers the second flow channel groove 103 to form a second flow channel.

[0042] It can be understood that by recessing the first flow channel groove 101 on the side of the flow channel plate 1 facing the first substrate 2, it is convenient to form the second flow channel groove 103 on the other side of the flow channel plate 1, and by the first substrate 2 and the second substrate 3 blocking the corresponding flow channel grooves, it is convenient to set the first flow channel and the second flow channel. The structure is simple, easy to process, and helps the design and implementation.

[0043] Specifically, the above-mentioned flow channel plate 1 may be presented as a plurality of "ji" - shaped structures connected in sequence. At this time, the first flow channel groove 101 and the second flow channel groove 103 may be arranged in a U - shape, and the surfaces of the first substrate 2 and the second substrate 3 facing the flow channel plate 1 are respectively connected to the protruding parts on the corresponding sides of the flow channel plate 1. Of course, the shape of the flow channel plate 1 can also be a wavy shape or a form combining a wavy shape with a "ji" - shaped structure, as long as it can form the first flow channel groove 101 and the second flow channel groove 103 on the flow channel plate 1.

[0044] In addition, during specific implementation, the surfaces of the first substrate 2 and the second substrate 3 in contact with the battery cell module 8 may be set as flat surfaces, so as to facilitate the assembly and fixation of the battery cell module 8 with the first substrate 2 and the second substrate 3 while forming the first flow channel and the second flow channel.

[0045] Continuing to combine Figures 1 to 6 As shown, in some exemplary embodiments, still taking the cold plate provided with a first liquid inlet - outlet component 4 and a second liquid inlet - outlet component 5 as an example, in this embodiment, for example, the cold plate may be provided with a protruding part 6.

[0046] Among them, along the length direction of the cold plate, protruding parts 6 are provided on one side of the first substrate 2, the second substrate 3 and the flow channel plate 1. The above - mentioned first liquid inlet - outlet component 4 is arranged on the protruding part 6 of the first substrate 2, and the second liquid inlet - outlet component 5 is arranged on the protruding part 6 of the second substrate 3.

[0047] It can be understood that through the setting of the protruding part 6, it is convenient to arrange the first liquid inlet - outlet component 4 and the second liquid inlet - outlet component 5. The structure is simple and easy to process and manufacture.

[0048] In a specific implementation, the protrusion 6 may be arranged in a rectangular structure, for example, and a cavity communicating with the first flow channel is formed between the protrusion 6 on the first substrate 2 and the protrusion 6 on the flow channel plate 1. The cavity is connected to the first liquid inlet / outlet assembly 4. A cavity communicating with the second flow channel is formed between the protrusion 6 on the second substrate 3 and the protrusion 6 on the flow channel plate 1. The cavity is connected to the second liquid inlet / outlet assembly 5.

[0049] Continue to combine Figures 1 to 6 As shown, in some exemplary embodiments, the first liquid inlet / outlet assembly 4 and the second liquid inlet / outlet assembly 5 are still provided on the cold plate. In this embodiment, the first liquid inlet / outlet assembly 4 may include a first liquid inlet connector 401 and a first liquid outlet connector 402 provided on the first substrate 2, and the second liquid inlet / outlet assembly 5 may include a second liquid inlet connector 501 and a second liquid outlet connector 502 provided on the second substrate 3.

[0050] It is understandable that by including corresponding inlet and outlet connectors for the first inlet / outlet assembly 4 and the second inlet / outlet assembly 5, respectively, the setup of the first inlet / outlet assembly 4 and the second inlet / outlet assembly 5 is facilitated, and the design and implementation are also facilitated.

[0051] In specific implementation, a partition is provided within the cavity between the first substrate 2 and the flow channel plate 1 to divide the cavity into a chamber communicating with the inlet of the first flow channel and a chamber communicating with the outlet of the first flow channel. The first liquid inlet connector 401 communicates with the chamber communicating with the inlet of the first flow channel, and the first liquid outlet connector 402 communicates with the chamber communicating with the outlet of the first flow channel. Similarly, a partition is provided within the cavity between the second substrate 3 and the flow channel plate 1 to divide the cavity into a chamber communicating with the inlet of the second flow channel and a chamber communicating with the outlet of the second flow channel. The second liquid inlet connector 501 communicates with the chamber communicating with the inlet of the second flow channel, and the second liquid outlet connector 502 communicates with the chamber communicating with the outlet of the second flow channel.

[0052] Continue to combine Figures 1 to 6 As shown, in some exemplary embodiments, the example still uses a first flow channel and a second flow channel on the cold plate. In this embodiment, the flow directions of the first flow channel and the second flow channel may be the same or opposite.

[0053] It is understandable that by setting the flow directions of the first and second flow channels to be the same or opposite, it is convenient to set the flow direction of the coolant according to the cooling requirements of the battery cell module 8, which is beneficial to the design and implementation.

[0054] It is worth mentioning that the flow direction of the flow channel can be adjusted by correspondingly allocating the flow directions of the first inlet / outlet liquid assembly 4 and the second inlet / outlet liquid assembly 5. By setting the coolant flow direction of the first inlet / outlet liquid assembly 4 to be opposite to the flow direction of the second inlet / outlet liquid assembly 5, the flow directions of the first flow channel and the second flow channel can be set to be opposite. Similarly, the reverse is also possible.

[0055] Continue to combine Figures 1 to 8 As shown, in some exemplary embodiments, the example still uses a first flow channel and a second flow channel on a cold plate. In this embodiment, for example, a flow regulating unit 7 may be provided in the first flow channel and the second flow channel.

[0056] The flow regulating unit 7 can reduce its volume when the temperature rises to increase the flow rate in the first and second flow channels, and increase its volume when the temperature falls to reduce the flow rate in the first and second flow channels.

[0057] It is understandable that by setting the flow regulating unit 7 in the first and second flow channels, and the flow regulating unit 7 being able to expand when cold and contract when hot, it is easy to realize automatic control of the coolant flow rate, improve the utilization rate of coolant, avoid energy waste, and facilitate design and implementation.

[0058] In practical implementation, receiving slots can be provided in the first and second flow channels, and the flow regulating unit 7 can be assembled in the receiving slots to facilitate the adjustment of the flow rate in the first and second flow channels. The receiving slots can be provided, for example, on the side wall of the first flow channel 101 and the side wall of the second flow channel 103. The number of flow regulating units 7 can be matched and set according to the adjustment requirements of the flow rate and the adjustment capability of the flow regulating units 7, as long as they can adjust the coolant flow rate in the first and second flow channels.

[0059] It is worth mentioning that, depending on the specific configuration of the flow regulating unit 7, its arrangement is not limited to being arranged through a receiving groove. The flow regulating unit 7 can also be fixed by adhesive bonding or by constraint through a limiting structure, as long as it can be arranged within the flow channel.

[0060] Continue to combine Figures 1 to 6 As shown, in some exemplary embodiments, the flow regulating part 7 is still provided in the first flow channel and the second flow channel as an example. In this embodiment, the flow regulating part 7 may include an elastic body and a regulating unit.

[0061] The above-mentioned elastomer has an inner cavity, and the adjustment unit is located in the inner cavity of the elastomer. The adjustment unit is made of zirconium tungstate.

[0062] It is understandable that by incorporating an elastic body with an internal adjustment unit, and by using the adjustment unit made of zirconium tungstate, the thermal expansion and contraction properties of zirconium tungstate can be utilized to reduce the volume of the elastic body when the temperature decreases and increase the volume of the elastic body when the temperature increases. This facilitates the adjustment of the coolant flow rate. Furthermore, the elastic body helps protect the adjustment unit, ensuring its effectiveness and facilitating design and implementation.

[0063] In practical implementation, the above-mentioned adjustment unit can be configured to match the internal cavity shape of the elastomer, so that the shape of the elastomer can be changed more easily when the adjustment unit deforms. Preferably, the shape of the elastomer can be, for example, spherical, with a similarly spherical internal cavity. The adjustment unit is filled in the internal cavity. In this case, when the adjustment unit expands, it will cause the elastomer to deform and increase. When the adjustment unit shrinks, the empty space inside the elastomer can be compressed by the pressure of the coolant in the flow channel, making the volume of the elastomer smaller, thereby facilitating design and implementation.

[0064] In addition, in practical implementation, the above adjustment unit can be made of other materials that can expand and contract with temperature (such as nickel-titanium shape memory alloys), in addition to zirconium tungstate. It is only necessary to ensure that it can deform within the working temperature range of the coolant.

[0065] Continue to combine Figures 1 to 6 As shown, in some exemplary embodiments, the flow regulating part 7 is still provided in the first flow channel and the second flow channel as an example. In this embodiment, the flow regulating part 7 can be glued to both the first flow channel and the second flow channel.

[0066] It is understandable that by adhesively mounting the flow regulating part 7 in the first and second flow channels, it is easier to assemble the flow regulating part 7 in the first and second flow channels, easier to process, and more conducive to design and implementation.

[0067] In practical implementation, besides using adhesive to attach the flow regulating part 7, a blocking part can also be used to constrain the flow regulating part 7 to a corresponding position within the flow channel. The blocking part can be, for example, a baffle plate with through holes for coolant flow. By placing baffle plates within the flow channel and creating a space between two baffle plates to accommodate the flow regulating part 7, the flow regulating part 7 can be constrained within this space, thus preventing it from being swept away from its preset position by the coolant.

[0068] In addition, the above-mentioned blocking part can also be a baffle net. The baffle net has mesh holes for coolant to flow through. The flow regulating part 7 is constrained in the preset installation position in the flow channel by the baffle net. Similarly, the position of the flow regulating part 7 can be fixed in a certain space to prevent the flow regulating part 7 from being washed away from the preset position.

[0069] It is worth noting that, regarding the cold plate in this embodiment, based on the above exemplary embodiments, in specific implementation, as a preferred embodiment, it is still made of... Figures 1 to 8 As shown, it is applied between the two-layer battery cell modules 8 and generally includes a flow channel plate 1, a first substrate 2 and a second substrate 3.

[0070] The first substrate 2 and the second substrate 3 are respectively arranged on both sides of the flow channel plate 1 in the thickness direction, and a first flow channel is provided between the first substrate 2 and the flow channel plate 1, and a second flow channel is provided between the second substrate 3 and the flow channel plate 1. The first substrate 2 is used to abut against the upper battery cell module 8, and the second substrate 3 is used to abut against the lower battery cell module 8. The first substrate 2 is provided with a first liquid inlet / outlet assembly 4 communicating with the first flow channel, and the second substrate 3 is provided with a second liquid inlet / outlet assembly 5 communicating with the second flow channel.

[0071] In this design, a plurality of first flow channel grooves 101 are recessed on one side of the flow channel plate 1 facing the first substrate 2, and a plurality of protrusions 102 corresponding to the first flow channel grooves 101 are formed on the other side of the flow channel plate 1. A second flow channel groove 103 is formed between two adjacent protrusions 102. The first substrate 2 covers each of the first flow channel grooves 101 to form a first flow channel, and the second substrate 3 covers each of the second flow channel grooves 103 to form a second flow channel. The flow directions of the first flow channel and the second flow channel are opposite.

[0072] The first substrate 2, the second substrate 3, and the flow channel plate 1 each have a protrusion 6 on one side, and the first liquid inlet / outlet assembly 4 and the second liquid inlet / outlet assembly 5 are both disposed on the protrusion 6. The first liquid inlet / outlet assembly 4 includes a first liquid inlet connector 401 and a first liquid outlet connector 402 disposed on the protrusion 6, and the second liquid inlet / outlet assembly 5 includes a second liquid inlet connector 501 and a second liquid outlet connector 502 disposed on the protrusion 6.

[0073] The flow regulating part 7 is glued into both the first and second flow channels. The flow regulating part 7 can shrink in volume when the temperature rises to increase the flow rate in the first and second flow channels, and expand in volume when the temperature drops to reduce the flow rate in the first and second flow channels. The flow regulating part includes an elastomer and an regulating unit disposed in the cavity of the elastomer. The regulating unit is made of zirconium tungstate.

[0074] In the above preferred embodiments, the specific configuration and arrangement of the flow channel plate 1, the first substrate 2, the second substrate 3, the protrusion 6, and the first liquid inlet / outlet assembly 4 can still be referred to the descriptions in the above exemplary embodiments. Furthermore, in this preferred embodiment, the beneficial effects brought about by the design of the flow channel plate 1, the first substrate 2, the second substrate 3, the protrusion 6, and the first liquid inlet / outlet assembly 4 can also be referred to the descriptions in the above exemplary embodiments.

[0075] The cold plate in this embodiment adopts the above design. A first flow channel is provided between the first substrate 2 and the flow channel plate 1, and a second flow channel is provided between the second substrate 3 and the flow channel plate 1, forming a double-layer flow channel structure. The first substrate 2 is used to abut against the upper battery cell module 8, and the second substrate 3 is used to abut against the lower battery cell module 8. Thus, the upper battery cell module 8 and the lower battery cell module 8 can be cooled respectively through the double-layer flow channel structure. With the setting of the first liquid inlet / outlet assembly 4 and the second liquid inlet / outlet assembly 5, the coolant in the first flow channel and the second flow channel can be adjusted respectively, which facilitates the adjustment of the heat exchange rate of the first flow channel and the second flow channel, which helps to improve the cooling effect of the cold plate and thus helps to improve the quality of use of the energy storage system.

[0076] An embodiment of the second aspect of this application provides a battery cluster comprising a plurality of cell modules 8 stacked vertically, wherein a cold plate as described above is provided between two adjacent cell modules 8.

[0077] In this embodiment of the battery cluster, the two sides of the aforementioned cold plate abut against the two sides of the cell module 8, and are generally fixed by adhesive. (See also...) Figure 1 , Figure 4 and Figure 5 As shown, the cold plate is generally arranged between two adjacent cell modules 8 along the stacking direction of the cell module 8.

[0078] In practical implementation, the connection method of each cell module 8 in the above battery cluster can refer to the connection method of the existing cell module 8 in the battery cluster, and will not be described again here.

[0079] The battery cluster in this embodiment has two flow channels through the cold plate setting as described above. The upper and lower layers of cell modules 8 adjacent to the cold plate are cooled by the two flow channels, which can improve the cooling effect of the cell modules 8 and help improve the quality of use of the energy storage system.

[0080] An embodiment of the third aspect of this application provides an energy storage system having a battery cluster as described above.

[0081] In the energy storage system of this embodiment, the aforementioned battery clusters are arranged in a cabinet or container as required by design. In specific implementation, the connection method between the battery clusters can refer to the connection method of battery clusters in existing energy storage systems, and will not be described in detail here.

[0082] The energy storage system of this embodiment, through the battery cluster arrangement as described above, enables the cold plate to have a double-layer flow channel, and cools the upper and lower modules adjacent to the cold plate through the double-layer flow channel, thereby improving the cooling effect of the battery cluster and thus helping to improve the quality of use of the energy storage system.

[0083] 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 cold plate, used between double-layer battery cell modules, characterized in that: It includes a flow channel plate, and a first substrate and a second substrate disposed on both sides of the flow channel plate in the thickness direction. A first flow channel is provided between the flow channel plate and the first substrate. A first liquid inlet / outlet assembly communicating with the first flow channel is provided on the first substrate, and the first substrate is used to abut against the upper battery cell module. A second flow channel is provided between the flow channel plate and the second substrate. A second liquid inlet / outlet assembly communicating with the second flow channel is provided on the second substrate, and the second substrate is used to abut against the lower layer of the battery cell module.

2. The cold-rolled plate according to claim 1, characterized in that: The flow channel plate has a plurality of first flow channel grooves recessed on the side facing the first substrate, so as to form a protrusion corresponding to each of the first flow channel grooves on the side of the flow channel plate facing the second substrate. The first substrate covers each of the first flow channel grooves to form the first flow channel; A second flow channel groove is formed between two adjacent protrusions, and the second substrate covers the second flow channel groove to form the second flow channel.

3. The cold-rolled plate according to claim 1, characterized in that: Along the length of the cold plate, one side of the first substrate, the second substrate, and the flow channel plate is provided with a protrusion; The first liquid inlet / outlet assembly is disposed on the protrusion of the first substrate, and the second liquid inlet / outlet assembly is disposed on the protrusion of the second substrate.

4. The cold-rolled plate according to claim 1, characterized in that: The first liquid inlet / outlet assembly includes a first liquid inlet connector and a first liquid outlet connector disposed on the first substrate. The second liquid inlet / outlet assembly includes a second liquid inlet connector and a second liquid outlet connector disposed on the second substrate.

5. The cold-rolled plate according to claim 1, characterized in that: The first flow channel and the second flow channel are configured with the same or opposite flow directions.

6. The cold-rolled plate according to claim 1, characterized in that: The first flow channel is provided with a flow regulating section, which can reduce its volume when the temperature rises to increase the flow rate in the first flow channel, and increase its volume when the temperature falls to reduce the flow rate in the first flow channel; and / or, The second flow channel is provided with a flow regulating part, which can reduce its volume when the temperature rises to increase the flow rate in the second flow channel, and increase its volume when the temperature drops to reduce the flow rate in the second flow channel.

7. The cold-rolled plate according to claim 6, characterized in that: The flow regulating part includes an elastomer and an regulating unit disposed in the inner cavity of the elastomer, the regulating unit being made of zirconium tungstate.

8. The cold-rolled plate according to claim 6, characterized in that: The flow regulating part is glued to both the first flow channel and the second flow channel.

9. A battery cluster, characterized in that: It includes multiple battery cell modules stacked vertically, and each pair of adjacent battery cell modules is provided with a cold plate as described in any one of claims 1 to 8.

10. An energy storage system, characterized in that: The energy storage system includes the battery cluster described in claim 9.

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