A battery pack, energy storage system, power plant and charging network

Abstract

This application provides a battery pack, energy storage system, power station, and charging network, relating to the field of energy technology, to solve the technical problems of poor heat dissipation and poor temperature uniformity. The battery pack provided by this application may include a cell assembly, a first heat exchange plate, and a second heat exchange plate. The cell assembly has a first heat-conducting surface and a second heat-conducting surface that are opposite to each other, and the electrodes of the cell assembly are all located on the first heat-conducting surface. The first heat exchange plate has a first plate surface with a first groove, the first plate surface being in thermal contact with the first heat-conducting surface, and the electrodes being located within the first groove. The second heat exchange plate has a second plate surface, the second plate surface being in thermal contact with the bottom surface. The battery pack provided by this application helps to reduce the temperature difference between different areas of the cell, thereby improving the temperature uniformity of the cell. Each cell in the cell assembly can dissipate heat through the first and second heat exchange plates, effectively improving the cooling effect and reducing the operating cost of the battery pack.

Description

Technical Field

[0001] This application relates to the field of energy technology, and more particularly to a battery pack, energy storage system, power station and charging network. Background Technology

[0002] With the continuous development and widespread application of clean energy, battery cells are increasingly being used in various types of energy storage devices. During the charging and discharging process of a battery cell, a certain amount of heat is generated. Furthermore, as the charging or discharging power increases, the heat generated by the battery cell also rises significantly. Therefore, the heat dissipation performance of the battery cell has a significant impact on the charging and discharging power.

[0003] Current solutions typically employ single-sided cooling to lower the temperature of the battery cell. For example, the bottom or side of the cell can be made into thermal contact with a cold plate. However, this method has poor heat dissipation, resulting in significant temperature differences between different areas of the cell and reducing its temperature uniformity. Summary of the Invention

[0004] This application provides a battery pack, energy storage system, power station, and charging network with better heat dissipation and improved temperature uniformity.

[0005] In a first aspect, this application provides a battery pack, which may include a cell assembly, a first heat exchange plate, and a second heat exchange plate. The cell assembly has a first heat-conducting surface and a second heat-conducting surface that are opposite to each other, and the electrodes of the cell assembly are all located on the first heat-conducting surface. The first heat exchange plate has a first plate surface with a first groove, the first plate surface being in thermal contact with the first heat-conducting surface, and the electrodes being located within the first groove. The second heat exchange plate has a second plate surface, which is in thermal contact with the second heat-conducting surface. Heat exchange can occur between the cell assembly and the first heat exchange plate through the thermal contact between the first heat-conducting surface and the first plate surface, allowing the first heat exchange plate to cool or heat the cell assembly. The first groove provides sufficient space for the electrodes, thereby preventing the electrodes from obstructing the thermal contact between the first heat-conducting surface and the second plate surface. In addition, the first heat exchange plate also provides effective protection for the electrodes and related components connected to the electrodes, which helps to improve the safety of the battery pack. The second heat exchange plate has a second plate surface, which is in thermal contact with the second heat-conducting surface. The battery cell assembly and the second heat exchange plate can exchange heat through the thermal contact between the second heat-conducting surface and the second plate surface, so that the second heat exchange plate can cool or heat the battery cell assembly.

[0006] In the battery pack provided in this application, the cell assembly, the first heat exchange plate, and the second heat exchange plate can form a sandwich structure. This helps reduce the temperature difference between different areas of the cell, thereby improving the temperature uniformity of the cell and ensuring the service life of the battery pack. Furthermore, each cell in the cell assembly can dissipate heat through the first and second heat exchange plates, effectively improving the cooling effect. Therefore, the battery pack has lower cooling requirements, reducing operating costs and making it suitable for high-rate applications.

[0007] In one example, the battery cell assembly includes multiple battery cells arranged sequentially along a first direction. Each battery cell has a first electrode and a second electrode. The first electrodes of all the battery cells are located near a first straight line, and the second electrodes of all the battery cells are located near a second straight line. The first straight line, the second straight line, and the first direction are parallel. A first plate surface has multiple first grooves, some of which are located near the first straight line, and others are located near the second straight line. The position and shape of the first grooves can be reasonably set according to the position of the electrodes in the battery cell and the connection requirements between different electrodes, thus providing good flexibility.

[0008] For example, the battery pack may also include a plate connected between the electrodes of two adjacent cells, and the plate is located in a first groove.

[0009] In one example, the first plate may also have a second groove and a connecting groove. One end of the connecting groove communicates with the first groove, and the other end communicates with the second groove. The second groove and the connecting groove can provide effective space for the wiring harness connected to the first groove, which helps to ensure the actual use requirements of the battery pack.

[0010] In a specific configuration, the second groove can be elongated and can be located within the third straight line. The first, second, and third straight lines are parallel, and the third straight line is located between the first and second straight lines.

[0011] The explosion-proof valve of the battery cell can be located between the first and second electrodes of the cell, and the second groove is located between the two rows of first grooves. Therefore, the second groove can be directly aligned with the explosion-proof valve of the cell, thus enabling communication between the second groove and the explosion-proof valve. When the explosion-proof valve is opened, the gas inside the battery cell can be discharged to the outside through the second groove, which helps to ensure the safety of the battery pack.

[0012] In a specific configuration, the distance between the electrode and the inner wall of the first groove can be greater than or equal to 1 mm. This ensures sufficient clearance between the electrode and the inner wall of the first groove, and also does not significantly affect the compactness of the different components of the battery pack.

[0013] The distance between the battery pack plate and the inner wall of the first groove can be greater than or equal to 1 mm. This ensures sufficient clearance between the battery pack plate and the inner wall of the first groove, and also does not significantly affect the compactness of the different components of the battery pack.

[0014] In one example, thermally conductive adhesive can be present between the electrode and the inner wall of the first groove. This adhesive can fill the gap between the electrode and the inner wall of the first groove to ensure structural stability and thermal conductivity between the electrode and the first heat exchange plate. Heat from the electrode and the heat from the electrode pad can be effectively transferred to the first heat exchange plate through the thermally conductive adhesive, thus preventing overheating and other adverse conditions from occurring on the electrode and electrode pad.

[0015] In one example, the first heat exchange plate includes a first plate body and a second plate body bonded together along the thickness direction, with the first plate surface located on the first plate body and the flow channel of the first heat exchange plate located within the second plate body. During manufacturing, the first plate body and the second plate body can be formed separately, allowing for the separate fabrication of the flow channel, the first groove, the second groove, and the connecting groove using appropriate processes. This effectively improves manufacturing convenience and helps reduce manufacturing costs and process complexity.

[0016] In one example, the second heat exchange plate has a frame located on the second plate surface and surrounding the battery cell assembly. The frame improves the positional accuracy between the battery cell assembly and the second heat exchange plate; additionally, when thermally conductive adhesive is filled between the second plate surface and the second heat exchange surface, the frame effectively prevents the adhesive from overflowing, ensuring the quality of the battery pack.

[0017] Secondly, this application also provides an energy storage system, including an inverter and any of the aforementioned battery packs. The inverter is electrically connected to the battery pack and is used to convert alternating current (AC) into direct current (DC) to supply the battery pack, or to convert DC from the battery pack into AC. By using the aforementioned battery pack, the heat dissipation performance and temperature uniformity of the energy storage system can be effectively improved, which is beneficial to ensuring the reliability and safety of the energy storage system.

[0018] Thirdly, this application also provides a power station, including a power generation device and any of the aforementioned battery packs. The power generation device is electrically connected to the battery pack, and the power generation device is used to store the generated electrical energy in the battery pack. By applying the aforementioned battery pack, the heat dissipation performance and temperature uniformity of the energy storage system can be effectively improved, which is beneficial to ensuring the reliability and safety of the energy storage system.

[0019] Fourthly, this application also provides a charging network, including a charging pile and any of the aforementioned battery packs. The charging pile is electrically connected to the battery pack, which supplies electrical energy to the charging pile, thereby replenishing the energy of the receiving equipment. By applying the aforementioned battery pack, the heat dissipation performance and temperature uniformity of the energy storage system can be effectively improved, which is beneficial to ensuring the reliability and safety of the energy storage system. Attached Figure Description

[0020] Figure 1 A schematic diagram of the side structure of a conventional battery pack provided in this application;

[0021] Figure 2 A three-dimensional structural diagram of a battery pack provided in an embodiment of this application;

[0022] Figure 3 This is an exploded view of a battery pack provided in an embodiment of this application;

[0023] Figure 4 This is another exploded structural diagram of a battery pack provided in an embodiment of this application;

[0024] Figure 5 A three-dimensional structural diagram of a battery cell provided in an embodiment of this application;

[0025] Figure 6 This is a schematic diagram of a partial cross-sectional structure of a battery pack provided in an embodiment of this application;

[0026] Figure 7 A three-dimensional structural schematic diagram of a first heat exchange plate provided in an embodiment of this application;

[0027] Figure 8 A schematic diagram of the planar structure of a first heat exchange plate provided in an embodiment of this application;

[0028] Figure 9 A three-dimensional structural schematic diagram of another first heat exchange plate provided in an embodiment of this application;

[0029] Figure 10 A three-dimensional structural schematic diagram of a second heat exchange plate provided in an embodiment of this application;

[0030] Figure 11 A structural block diagram of an energy storage system provided in an embodiment of this application;

[0031] Figure 12 A structural block diagram of a power plant provided in an embodiment of this application;

[0032] Figure 13 This is a simplified structural diagram of a charging network provided in an embodiment of this application. Detailed Implementation

[0033] To make the objectives, technical solutions, and advantages of this application clearer, the application will now be described in further detail with reference to the accompanying drawings.

[0034] To facilitate understanding of the battery pack provided in the embodiments of this application, its application scenarios will be introduced first below.

[0035] The battery pack provided in this application embodiment can be applied in scenarios such as home energy storage, industrial energy storage, data centers, and vehicles to store and release electrical energy.

[0036] In practical applications, to ensure that the battery pack can store sufficient electrical energy, it typically includes multiple battery cells. To reduce the size of the battery pack, the cells are arranged compactly. During the charging and discharging process, heat is generated. To prevent overheating, a heat dissipation structure can be incorporated into the battery pack.

[0037] Current heat dissipation structures are generally divided into two types: air cooling and liquid cooling. Air cooling primarily relies on airflow to remove heat from the battery cell surface. Liquid cooling, on the other hand, relies on the flow of a medium (such as water or oil) to remove heat from the battery cell surface. Because liquid cooling is more efficient and occupies less space, it is increasingly being adopted in the industry.

[0038] However, current liquid cooling systems still have many shortcomings in their heat dissipation structure.

[0039] For example, such as Figure 1 As shown, in the current liquid-cooled battery pack 01, it generally includes a heat exchange plate 011 and multiple battery cells 012. The multiple battery cells 012 are arranged sequentially, and the bottom surface of each battery cell 012 is in thermal contact with the heat exchange plate 011, so that the heat exchange plate 011 can cool the battery cell 012. However, the vertical dimension of the battery cell 012 is relatively large, and the heat at the top of the battery cell 012 cannot be efficiently transferred to the bottom, resulting in a large temperature difference between the top and bottom of the battery cell 012. This is not conducive to ensuring the temperature uniformity of the battery cell 012 itself, which will affect the working reliability and service life of the battery pack 01.

[0040] Therefore, this application provides a battery pack with better heat dissipation and better temperature uniformity.

[0041] To make the objectives, technical solutions, and advantages of this application clearer, the application will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0042] The terminology used in the following embodiments is for the purpose of describing particular embodiments only and is not intended to be limiting of this application. As used in the specification and appended claims of this application, the singular expressions “a,” “an,” and “the” are intended to also include expressions such as “one or more,” unless the context clearly indicates otherwise. It should also be understood that in the following embodiments of this application, “at least one” means one, two, or more.

[0043] References to "one embodiment" and similar terms used in this specification mean that one or more embodiments of this application include a particular feature, structure, or characteristic described in connection with that embodiment. Therefore, phrases such as "in one embodiment," "in some embodiments," and "in other embodiments" appearing in different parts of this specification do not necessarily refer to the same embodiment, but rather mean "one or more, but not all, embodiments," unless otherwise specifically emphasized. The terms "comprising," "having," and variations thereof mean "including, but not limited to," unless otherwise specifically emphasized.

[0044] like Figure 2 As shown, in one example provided in this application, the battery pack 10 may include a cell assembly 11, a first heat exchange plate 12, and a second heat exchange plate 13. The cell assembly 11 is located between the first heat exchange plate 12 and the second heat exchange plate 13, so that the entire battery pack 10 can form a sandwich structure. Figure 3 and Figure 4 As shown, the battery cell assembly 11 has a first heat-conducting surface 111 and a second heat-conducting surface 112 that are opposite to each other, and the electrodes of the battery cell assembly 11 are all located on the first heat-conducting surface 111; the first heat exchange plate 12 has a first plate surface 121, the first plate surface 121 has a first groove 122, the first plate surface 121 is in thermal contact with the first heat-conducting surface 111, and the electrodes are located in the first groove 122. Heat exchange can occur between the battery cell assembly 11 and the first heat exchange plate 12 through the thermal contact between the first heat-conducting surface 111 and the first plate surface 121, so that the first heat exchange plate 12 can cool or heat the battery cell assembly 11. The first groove 122 can provide sufficient space for the electrodes, thereby preventing the electrodes from obstructing the thermal contact between the first heat-conducting surface 111 and the first plate surface 121. In addition, the first heat exchange plate 12 can also provide effective protection for the electrodes and related components connected to the electrodes, which is beneficial to improving the safety of the battery pack 10. The second heat exchange plate 13 has a second plate surface 131, which is in thermal contact with the second heat-conducting surface 112. The battery cell assembly 11 and the second heat exchange plate 13 can exchange heat through the thermal contact between the second heat-conducting surface 112 and the second plate surface 131, so that the second heat exchange plate 13 can cool or heat the battery cell assembly 11.

[0045] In the battery pack 10 provided in this application, the cell assembly 11, the first heat exchange plate 12, and the second heat exchange plate 13 can form a sandwich structure. The first heat exchange plate 12 can exchange heat with the first heat-conducting surface 111 of the cell assembly 11, and the second heat exchange plate 13 can exchange heat with the second heat-conducting surface 112 of the cell assembly 11. This helps to reduce the temperature difference between different areas of the cell 110, thereby improving the temperature uniformity of the cell 110 and ensuring the service life of the battery pack 10. In addition, each cell 110 in the cell assembly 11 can dissipate heat through the first heat exchange plate 12 and the second heat exchange plate 13, which can effectively improve the cooling effect. Therefore, the battery pack 10 has a lower demand for cooling, which can reduce the operating cost of the battery pack 10 and is suitable for high-rate scenarios.

[0046] like Figure 4 As shown, it should be noted that in the example provided in this application, the battery cell assembly 11 includes multiple battery cells 110, and the multiple battery cells 110 are arranged sequentially along a first direction. Each battery cell 110 has electrodes including a first electrode 113 and a second electrode 114. The first electrodes 113 of the multiple battery cells 110 are all located within a first straight line L1, and the second electrodes 114 of the multiple battery cells 110 are all located within a second straight line L2. The first straight line L1, the second straight line L2, and the first direction are parallel, where the first direction is the thickness direction of the battery cell 110. The first straight line L1 and the second straight line L2 are both approximately straight lines. In practical applications, the positions of the multiple first electrodes 113 are all located on approximately the same straight line; correspondingly, the positions of the multiple second electrodes 114 are all located on approximately the same straight line.

[0047] It should be noted that in practical applications, the first electrode 113 and the second electrode 114 defined above are for the convenience of distinguishing the polarity of the battery cell 110. The first electrode 113 can be either a positive or negative electrode, and the second electrode 114 can also be either a positive or negative electrode. That is to say, all positive electrodes of the battery cells 110 can be located within the first straight line L1, and all negative electrodes of the battery cells 110 can be located within the second straight line L2. Alternatively, some negative electrodes of the battery cells 110 can be located within the first straight line L1, and some positive electrodes of the battery cells 110 can be located within the first straight line L1, while some negative electrodes of the battery cells 110 can be located within the second straight line L2, and some positive electrodes of the battery cells 110 can be located within the second straight line L2.

[0048] In practical applications, the positions of the positive and negative electrodes of different cells 110 can be reasonably adjusted according to the series and parallel connection requirements between cells 110 in the cell assembly 11. This application does not impose any restrictions on this.

[0049] Additionally, it should be noted that the thickness direction of the aforementioned cell 110 refers to the direction perpendicular to one of the sides of the cell 110. In practical applications, the thickness direction of the cell 110 can be reasonably set according to the shape and size of the battery.

[0050] For example, such as Figure 5 As shown, in a battery cell 110 provided in this application, the battery cell 110 has a rectangular block structure with a top surface 1101, a bottom surface 1102, and side surfaces 1103, 1104, 1105, and 1106. The top surface 1101 has a first electrode 113, a second electrode 114, and an explosion-proof valve 115. Side surfaces 1103 and 1104 have smaller areas, while side surfaces 1105 and 1106 have larger areas. The top surface 1101 of the battery cell 110 collectively forms the first heat-conducting surface 111 of the battery cell assembly 11, and the bottom surface 1102 of the battery cell 110 collectively forms the second heat-conducting surface 112 of the battery cell assembly 11.

[0051] In the example provided in this application, the direction perpendicular to side 1105 (or side 1106) is defined as the thickness direction of the cell 110. The larger side surfaces (such as side 1105 or side 1106) of two adjacent cells 110 are in contact with each other, resulting in a large contact area between them. When there is a compressive force between two adjacent cells 110, it effectively prevents deformation of the two adjacent cells 110, which helps ensure the structural strength and safety of the cell assembly 11. The top surface 1101 of the cell 110 is in contact with the first heat exchange plate 12, and the bottom surface 1102 of the cell 110 is in contact with the second heat exchange plate 13, thereby forming a heat dissipation path perpendicular to the cell assembly 11, which helps ensure the temperature uniformity of each cell 110. In addition, when the battery cell 110 expands and deforms, the areas of the side surfaces 1105 and 1106 are larger, while the areas of the top surface 1101 and bottom surface 1102 are smaller. Therefore, the expansion force generated by the top surface 1101 and bottom surface 1102 is less than that generated by the side surfaces 1105 and 1106, which reduces the pressure of the battery cell 110 on the first heat exchange plate 12 and the second heat exchange plate 13, and helps to ensure the structural stability and reliability of the first heat exchange plate 12 and the second heat exchange plate 13.

[0052] Of course, in other examples, the direction perpendicular to side 1103 (or side 1104) can also be defined as the thickness direction of cell 110, which will not be elaborated here.

[0053] In addition, such as Figure 4As shown, in order to better provide corresponding space for the electrodes of the battery cell assembly 11 in the first groove 122, in the example provided in this application, the first plate surface 121 has multiple first grooves 122. After the first heat exchange plate 12 and the battery cell assembly 11 are assembled in place, a portion of the first grooves 122 in the first heat exchange plate 12 are located within the first straight line L1, so that the first electrodes 113 located within the first straight line L1 can all be located within the first grooves 122. Another portion of the first grooves 122 are located within the second straight line L2, so that the second electrodes 114 located within the second straight line L2 can all be located within the first grooves 122.

[0054] In practical applications, different cells 110 need to be connected in series or in parallel. Therefore, in the example provided in this application, the electrodes of two adjacent cells 110 can be set in the same first groove 122 to facilitate the connection between the electrodes of the two cells 110.

[0055] Specifically, such as Figure 6 As shown in the example provided in this application, adjacent battery cells 110a and 110b are used as examples. The first electrode 113a of battery cell 110a and the first electrode 113b of battery cell 110b are both located within the same first groove 122. In addition, a tab 14 is also provided within the first groove 122. One end of the tab 14 is connected to the first electrode 113a, and the other end is connected to the first electrode 113b, thereby realizing the electrical connection between the first electrode 113a and the first electrode 113b.

[0056] Furthermore, in practical applications, sufficient gaps can be maintained between the first electrode 113a of cell 110a, the first electrode 113b of cell 110b, and the inner wall of the first groove 122 to prevent interference between the first heat exchange plate 12 and the first electrodes 113a and 113b, effectively ensuring the safety of the battery pack 10. Additionally, sufficient gaps can also be maintained between the plate 14 and the inner wall of the first groove 122 to prevent interference between the first heat exchange plate 12 and the plate 14.

[0057] During long-term use of the battery pack, some cells 110 may expand, deform, or shift. Sufficient gaps between the electrodes (such as the first electrode 113 or the second electrode 114) or the tab 14 of the cell 110 and the inner wall of the first groove 122 ensure the reliability of the battery pack 10 during long-term use. Alternatively, in some examples, thermally conductive adhesive can be filled into the first groove 122. This adhesive fills the gap between the electrodes of the cell 110 and the inner wall of the first groove 122, ensuring structural stability and thermal conductivity between the electrodes and the first heat exchange plate 12. Heat from the electrodes can be effectively transferred to the first heat exchange plate 12 through the thermally conductive adhesive, thus preventing adverse conditions such as high electrode temperatures. Similarly, thermally conductive adhesive fills the gap between the tab 14 and the inner wall of the first groove 122, ensuring structural stability and thermal conductivity between the tab 14 and the first heat exchange plate 12. The heat in the heat exchanger 14 can be effectively transferred to the first heat exchange plate 12 through the thermally conductive adhesive, thus preventing the heat exchanger 14 from overheating or other adverse conditions. In addition, in specific implementations, the thermally conductive adhesive can be made of a material with good bonding strength, which can achieve a fixed connection between the first heat exchange plate 12 and the battery cell assembly 11, thereby avoiding the need to use other connection structures to achieve a fixed connection between the first heat exchange plate 12 and the battery cell assembly 11.

[0058] In a specific configuration, the distance between the electrode (such as the first electrode 113 or the second electrode 114) and the inner wall of the first groove 122 is greater than or equal to 1 mm. This ensures sufficient clearance between the electrode and the inner wall of the first groove 122, and also does not significantly affect the compactness of the different components of the battery pack 10. Correspondingly, the distance between the tab 14 and the inner wall of the first groove 122 is greater than or equal to 1 mm. This ensures sufficient clearance between the tab 14 and the inner wall of the first groove 122, and also does not significantly affect the compactness of the different components of the battery pack 10.

[0059] In a specific configuration, the bar sheet 14 can be a sheet-like structure made of copper, aluminum, or their alloys. This application does not impose any restrictions on the specific material or shape of the bar sheet 14.

[0060] In addition, such as Figure 7 and Figure 8 As shown, in one example provided in this application, the first plate surface 121 also has a second groove 123 and a connecting groove 124, one end of the connecting groove 124 is connected to the first groove 122, and the other end is connected to the second groove 123.

[0061] In practical applications, the battery pack 10 can be equipped with voltage or temperature detection devices to effectively detect parameters such as voltage or temperature of each cell 110. The voltage or temperature detection devices can be located on the top surface 1101 of the cell 110 and connected to an external battery management system (BMS) via wiring harnesses, thereby transmitting the collected voltage or temperature signals to the BMS. The second groove 123 and the connecting groove 124 provide effective space for the wiring harness to pass through.

[0062] like Figure 8 As shown, in a specific configuration, the second groove 123 can be located within the third straight line L3 between the two rows of first grooves 122. The first straight line L1, the second straight line L2, and the third straight line L3 are all parallel to each other. Furthermore, the second groove 123 can also be connected to the explosion-proof valve 115 of the battery cell 110, allowing gas leaking from the explosion-proof valve 115 to be discharged to the outside through the second groove 123. In a specific implementation, the explosion-proof valve 115 of the battery cell 110 can be located between the first electrode 113 and the second electrode 114 of the battery cell 110, and the second groove 123 is located between the two rows of first grooves 122. Therefore, the second groove 123 can be directly opposite the explosion-proof valve 115 of the battery cell 110, thus enabling communication between the second groove 123 and the explosion-proof valve 115.

[0063] like Figure 8 As shown, one end of the second groove 123 may have a vent 125, which may extend to the side of the first heat exchange plate 12. When some cells 110 in the battery pack 10 experience thermal runaway or other adverse conditions, the generated high-temperature gas can break through the explosion-proof valve 115. The gas leaking through the explosion-proof valve 115 can be discharged into the second groove 123 and then discharged to the outside through the vent 125 of the second groove 123. This can effectively avoid or reduce secondary damage caused by the cell 110.

[0064] In practical applications, the shape and size of the second groove 123 can be flexibly set according to actual needs, which will not be elaborated here.

[0065] In addition, in specific settings, the liquid inlet 126 and liquid outlet 127 of the first heat exchange plate 12 can be located on the same side of the first heat exchange plate 12 or on different sides of the first heat exchange plate 12.

[0066] For example, such as Figure 8 As shown, in one example provided in this application, the liquid inlet 126 and liquid outlet 127 of the first heat exchange plate 12 can be located on the same side of the first heat exchange plate 12 (e.g., Figure 8(Left side of the image). The medium can flow into the flow channel in the first heat exchange plate 12 through the inlet 126 and flow out through the outlet 127. When the medium flows in the flow channel in the first heat exchange plate 12, it will exchange heat with the first heat exchange plate 12, thereby cooling or heating the first heat exchange plate 12, and thus effectively controlling the heat of the battery cell assembly 11.

[0067] In specific configurations, the first heat exchange plate 12 can be a single-piece structure or assembled from multiple component structures.

[0068] For example, such as Figure 9 As shown, in one example provided in this application, the heat exchange plate 12 is composed of two components. Specifically, the first heat exchange plate 12 includes a first plate body 12a and a second plate body 12b bonded together along its thickness direction. The first plate surface 121 is located in the first plate body 12a, and the flow channels of the first heat exchange plate 12 are located within the second plate body 12b. Specifically, the aforementioned flow channel structure can be located within the second plate body 12b, and the aforementioned first groove 122, second groove 123, and connecting groove 124 can all be located in the first plate body 12a. During manufacturing, the first plate body 12a and the second plate body 12b can be formed separately, allowing for the separate fabrication of the flow channels, first groove 122, second groove 123, and connecting groove 124 using appropriate processes. This effectively improves the convenience of manufacturing and helps reduce manufacturing costs and process difficulty. After the first plate body 12a and the second plate body 12b are formed, they can be assembled using processes such as welding or bonding to finally complete the fabrication of the first heat exchange plate 12.

[0069] In addition, the structure of the second heat exchange plate 13 can be varied in specific applications.

[0070] For example, such as Figure 10 As shown, in one example provided in this application, the second heat exchange plate 13 is a rectangular plate structure with internal flow channels. The liquid inlet of the second heat exchange plate 13 ( Figure 10 (not shown in the image) and the outlet ( Figure 10 (Not shown) can be located on the same side of the second heat exchange plate 13. The medium can flow into the flow channel in the second heat exchange plate 13 through the inlet and flow out through the outlet. When the medium flows in the flow channel in the second heat exchange plate 13, it will exchange heat with the second heat exchange plate 13, thereby cooling or heating the second heat exchange plate 13, and thus effectively controlling the heat of the battery cell assembly 11.

[0071] Please refer to the following: Figure 3 and Figure 10The second heat exchange plate 13 has a frame 132 located on the second plate surface 131 and surrounding the battery cell assembly 11. Specifically, the frame 132 has a certain height dimension and surrounds the four sides of the battery cell assembly 11.

[0072] When assembling the battery cell assembly 11 and the second heat exchange plate 13, the battery cell assembly 11 can be aligned with the area enclosed by the frame 132, which helps to ensure the positional accuracy between the battery cell assembly 11 and the second heat exchange plate 13. There may be a certain gap between the frame 132 and the side of the battery cell assembly 11. Alternatively, the inner wall of the frame 132 may also be fitted to the side of the battery cell assembly 11.

[0073] The battery cell assembly 11 and the second heat exchange plate 13 can be thermally conductive and fixedly connected by thermally conductive adhesive. The thermally conductive adhesive can be applied to the second plate surface 131, and then the second thermally conductive surface 112 of the battery cell assembly 11 is attached to the second plate surface 131, so that the thermally conductive adhesive is fully distributed in the gap between the second plate surface 131 and the second thermally conductive surface 112.

[0074] In addition, the frame 132 can effectively block the overflow of thermally conductive adhesive, preventing the overflow of thermally conductive adhesive from contaminating the outer surface of the second heat exchange plate 13.

[0075] In practical applications, the battery pack 10 may also include more cell assemblies 11, a first heat exchange plate 12, and a second heat exchange plate 13. Specifically, Figure 2 The battery pack 10 shown is a battery pack unit consisting of a cell assembly 11, a first heat exchange plate 12, and a second heat exchange plate 13. In other examples, it may include two, three, or more battery pack units, which may be arranged sequentially along a first direction or along a second direction.

[0076] The number and layout of the battery pack units contained in the battery pack 10 can be flexibly selected and adjusted according to actual needs. In addition, the number of battery cells 110 contained in each cell assembly 11 can also be reasonably set according to actual needs, and this application does not impose any restrictions on this.

[0077] In practical applications, the battery pack 10 can be used in scenarios such as home energy storage, industrial energy storage, data centers, and vehicles to store and release electrical energy.

[0078] For example, such as Figure 11 As shown in the illustration, this application embodiment also provides an energy storage system, which may include an inverter and a battery pack 10. The inverter is electrically connected to the battery pack 10 and is used to convert alternating current (AC) into direct current (DC) and supply it to the battery pack 10, or to convert DC power from the battery pack 10 into AC power.

[0079] In addition, the energy storage system may also include a battery management system. The battery management system can effectively detect parameters such as the temperature, state of charge, and health status of the battery pack, and can also effectively regulate the charging and discharging functions of the battery pack, thereby ensuring the normal operation of the energy storage device.

[0080] Or, such as Figure 12 As shown in the illustration, this application also provides a power station, which may include a power generation device and a battery pack. The power generation device is electrically connected to the battery pack, and the power generation device is used to store the generated electrical energy in the battery pack. By applying the above-described battery pack, the safety of the power station and the difficulty of deployment can be effectively improved.

[0081] In practical applications, the power generation equipment can be photovoltaic power generation equipment, wind power generation equipment, etc., and this application does not limit the specific type of power generation equipment. Furthermore, in practical applications, the power generation equipment and the battery pack can also be connected via a distribution cabinet. The distribution cabinet may include DC-AC conversion devices, or it may include devices such as transformers, to facilitate the efficient transmission of electrical energy generated by the power generation equipment to the battery pack for storage. In specific setups, the number and type of devices in the distribution cabinet can be reasonably configured according to actual needs, and this application does not impose any restrictions on this.

[0082] Or, such as Figure 13 As shown in the illustration, this application embodiment also provides a charging network, including a charging pile 20 and a battery pack. The charging pile 20 and the battery pack are electrically connected via a cable, and the battery pack can provide its stored electrical energy to the charging pile 20. The charging pile 20 has a connector 21, which can be connected to a powered device (such as a vehicle) to replenish the power of the powered device. By applying the above-described battery pack, the security of the charging network can be effectively improved, and the flexibility of the charging network during deployment can also be enhanced.

[0083] In a specific setup, the charging network can include multiple battery packs and multiple charging piles 20. Each battery pack can provide power to multiple charging piles, thereby effectively improving the flexibility of deployment.

[0084] The above are merely specific embodiments of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A battery pack, characterized by, Includes battery cell assembly, first heat exchange plate and second heat exchange plate; The battery cell assembly has a first heat-conducting surface and a second heat-conducting surface that are opposite to each other, and the electrodes of the battery cell assembly are all located on the first heat-conducting surface. The first heat exchange plate has a first plate surface, the first plate surface has a first groove, the first plate surface is in thermal contact with the first heat-conducting surface, and the electrode is located in the first groove; The second heat exchange plate has a second plate surface, which is in thermal contact with the second heat-conducting surface; The first plate surface also has a second groove, and the battery cell assembly includes a battery cell, the battery cell including an explosion-proof valve; The second groove is directly opposite the explosion-proof valve, and the second groove is in communication with the explosion-proof valve.

2. The battery pack of claim 1, wherein, The battery cell assembly includes multiple battery cells, and the multiple battery cells are arranged sequentially along a first direction; Each of the battery cells includes a first electrode and a second electrode. The first electrodes of the plurality of battery cells are all located within a first straight line, and the second electrodes of the plurality of battery cells are all located within a second straight line. The first straight line, the second straight line, and the first direction are parallel. The first plate surface has a plurality of the first grooves, a portion of which are located within the first straight line, and another portion of which are located within the second straight line.

3. The battery pack of claim 1 or 2, wherein, The distance between the electrode and the inner wall of the first groove is greater than or equal to 1 mm.

4. The battery pack of claim 3, wherein, Thermally conductive adhesive is present between the electrode and the inner wall of the first groove.

5. The battery pack of claim 1 or 2, wherein, It also includes a tab, which is connected between the electrodes of two adjacent cells and is located within the first groove.

6. The battery pack of claim 5, wherein, The distance between the plate and the inner wall of the first groove is greater than or equal to 1 mm.

7. The battery pack of claim 2, wherein, The first plate surface also has a connecting groove; One end of the connecting groove is connected to the first groove, and the other end is connected to the second groove.

8. The battery pack of claim 7, wherein, The second groove is located within the third straight line, the first straight line, the second straight line and the third straight line are parallel, and the third straight line is located between the first straight line and the second straight line.

9. The battery pack of claim 1 or 2, wherein, The first heat exchange plate includes a first plate body and a second plate body that are bonded together along the thickness direction; The first plate surface is located within the first plate body, and the flow channel of the first heat exchange plate is located within the second plate body.

10. The battery pack of claim 1 or 2, wherein, The second heat exchange plate has a frame located on the second plate surface and surrounding the cell assembly.

11. An energy storage system, characterized in that, Includes an inverter and a battery pack as described in any one of claims 1 to 10, wherein the inverter is electrically connected to the battery pack and is used to convert alternating current into direct current and supply it to the battery pack, or to convert direct current from the battery pack into alternating current.

12. A power station, characterized in that, It includes a power generation device and a battery pack as claimed in any one of claims 1 to 10, wherein the power generation device is electrically connected to the battery pack and the power generation device is used to store the generated electrical energy into the battery pack.

13. A charging network, characterized in that, It includes a charging pile and a battery pack as described in any one of claims 1 to 10, wherein the charging pile is electrically connected to the battery pack, and the battery pack is used to provide electrical energy to the charging pile.

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