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 problem of poor heat dissipation structure in battery packs. The battery pack provided in this application includes a duct assembly and a first cell assembly; the duct assembly includes a connecting component and multiple duct plates, which are spaced apart and laid flat, with adjacent duct plates fixedly connected by the connecting component, which is insulated; each duct plate has a first surface, and the first surface of each duct plate is located on the same side of the duct assembly; each cell in the first cell assembly has a first contact surface, and the first surface of the duct plate corresponds to and is contacted with the first contact surface of the cell. In the battery pack provided in this application, the contact area between the cell assembly and the duct assembly can be effectively increased, and electrical isolation can be achieved between adjacent duct plates, effectively improving the safety 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] In practical applications, to achieve a sufficiently large capacity, energy storage devices typically incorporate multiple battery cells. Furthermore, to reduce the size of the device, these cells are often arranged in a close-knit configuration. This, in turn, hinders heat dissipation from the cells. Summary of the Invention

[0004] This application provides a battery pack, energy storage system, power station, and charging network with good heat dissipation and high safety.

[0005] Firstly, this application provides a battery pack, which may include a duct assembly and a first cell assembly. The duct assembly includes a connecting component and multiple duct plates, which are arranged in a spaced-apart manner. Adjacent duct plates are fixedly connected by the connecting component, which is insulated. Each duct plate has a first surface, and the first surface of each duct plate is located on the same side of the duct assembly. The first cell assembly includes multiple cells, each cell having a first contact surface. The number of cells is the same as the number of duct plates, and the first surface of each duct plate corresponds to the first contact surface of each cell. In the battery pack provided by this application, the duct plates in the duct assembly can provide a large contact surface, thus effectively increasing the contact area between the cell assembly and the duct assembly, avoiding uneven stress on the cells in the cell assembly, and ensuring the safety of the battery pack. Furthermore, since the connecting component is insulated, electrical isolation between adjacent duct plates can be achieved, effectively improving the safety of the battery pack.

[0006] In one example, the battery cell assembly can be placed on one side of the air duct assembly or on the other side.

[0007] For example, each air duct plate may have a second surface, which is opposite to the first surface. The battery pack may also include a second cell assembly, which includes multiple cells, each with a second bonding surface. The number of cells in the second cell assembly is the same as the number of air duct plates, and the second surfaces of the multiple air duct plates correspond one-to-one with the second bonding surfaces of the multiple cells. Each air duct assembly can simultaneously dissipate heat from the first and second cell assemblies located on its two sides, making the battery pack structure more compact and reducing its size.

[0008] In one example, the battery pack may include multiple air duct assemblies and battery cell assemblies, which can be arranged alternately along the thickness direction of the air duct plate. Each battery cell assembly includes a first battery cell assembly. This stacked arrangement effectively increases the power density of the battery pack and helps reduce its footprint, facilitating its deployment.

[0009] In one example, the first bonding surface can be the largest surface or one of the largest surfaces on the outer surface of the battery cell. For example, when the outer surface of the battery cell includes only one largest surface, that largest surface can be used as the first bonding surface. Alternatively, when the outer surface of the battery cell includes multiple largest surfaces, any one of the largest surfaces can be used as the first bonding surface.

[0010] In one example, each cell may also have a second bonding surface, with the first bonding surface facing away from the second bonding surface, to facilitate the stacking of the cell assembly and the air duct assembly.

[0011] In one example, each air duct plate may have its own air duct, and the air ducts of multiple air duct plates arranged in a first direction are interconnected. The first direction refers to the extending direction of the air duct within the air duct plate. Since air circulates within the air duct assembly and does not come into contact with the surface of the battery cell, the safety of the battery cell is improved. When impurities such as dust and moisture are present in the air, they will not corrode the outer surface of the battery cell, thus contributing to its safety.

[0012] In a specific configuration, the connection component may include a first connector, which is connected between two adjacent air duct plates to achieve a fixed connection between the two adjacent air duct plates.

[0013] In one example, the connecting component may further include a second connector having a connecting channel. The second connector can connect between two adjacent air duct panels arranged along a first direction, and the air ducts of both adjacent air duct panels are connected to the connecting channel. The first direction is the extending direction of the air duct within the air duct panel. That is, the second connector can not only fix two adjacent air duct panels together but also connect two air ducts, thus facilitating flexible deployment of the air duct component.

[0014] In one example, the connecting component may also include auxiliary connectors. These auxiliary connectors may be located between two adjacent first connectors and between two adjacent second connectors, for securing the two adjacent first connectors and the two adjacent second connectors together.

[0015] In practical implementation, the air duct plate can be a single-piece structure. Alternatively, it can be composed of multiple components. For example, the air duct plate may include a first plate and a second plate that interlock with each other. The first plate surface may be located on the first plate, and a second plate surface opposite to the first plate surface may be located on the second plate. During manufacturing, the first and second plate surfaces can be fabricated separately first, and then the first plate surface and the second plate surface can be fixedly connected, effectively reducing the manufacturing difficulty and improving manufacturing efficiency.

[0016] In one example, the battery pack may further include a housing and a fan, with the air duct assembly and battery cells housed within the housing. The fan may be located in a first direction to accelerate the airflow within the air duct, thereby improving the heat dissipation efficiency of the battery pack. The first direction refers to the extension direction of the air duct within the air duct plate.

[0017] In one example, the duct plate may further include at least two duct sub-plates stacked along the thickness direction of the duct plate and an insulating interlayer. The insulating interlayer may be located between two adjacent duct sub-plates to achieve electrical isolation between the two duct sub-plates, thereby improving the safety of the battery pack.

[0018] In one example, the duct panel may also include multiple splice panels and connectors. Multiple splice panels can be laid out in a spaced-apart configuration, and adjacent splice panels can be fixedly connected by connectors. In practical applications, the number and arrangement of splice panels can be flexibly configured according to the required size or shape of the duct panel, thereby improving the applicability and scalability of the duct panel.

[0019] 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 applying the aforementioned battery pack, the power density of the energy storage system can be effectively improved, and it has the advantages of easy deployment and high security.

[0020] 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 safety of the power station and the difficulty of deployment can be effectively improved.

[0021] 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 provides electrical energy to the charging pile, thereby replenishing the power of the receiving equipment. By applying the aforementioned 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. Attached Figure Description

[0022] Figure 1 This is an exploded structural diagram of a portion of a conventional battery pack.

[0023] Figure 2 This is an exploded view of a battery pack provided in an embodiment of this application;

[0024] Figure 3 A three-dimensional structural diagram of a battery cell provided in an embodiment of this application;

[0025] Figure 4 An exploded view of another battery pack provided in an embodiment of this application;

[0026] Figure 5 A three-dimensional structural schematic diagram of an air duct plate provided in an embodiment of this application;

[0027] Figure 6 An exploded view of another air duct plate provided in an embodiment of this application;

[0028] Figure 7 A three-dimensional structural schematic diagram of another air duct plate provided in an embodiment of this application;

[0029] Figure 8 An exploded view of a duct assembly provided in an embodiment of this application;

[0030] Figure 9 for Figure 8 A magnified view of a portion of the image;

[0031] Figure 10 A three-dimensional structural schematic diagram of another air duct plate provided in an embodiment of this application;

[0032] Figure 11 A three-dimensional structural schematic diagram of another battery pack provided in an embodiment of this application;

[0033] Figure 12 An exploded structural diagram of a partial structure of another air duct component provided in an embodiment of this application;

[0034] Figure 13 An exploded structural diagram of a partial structure of another air duct component provided in an embodiment of this application;

[0035] Figure 14 A three-dimensional structural schematic diagram of another battery pack provided in an embodiment of this application;

[0036] Figure 15 for Figure 14 A schematic diagram of the decomposed structure;

[0037] Figure 16 A structural block diagram of an energy storage system provided in an embodiment of this application;

[0038] Figure 17 A structural block diagram of a power plant provided in an embodiment of this application;

[0039] Figure 18 This is a structural block diagram of a charging network provided in an embodiment of this application. Detailed Implementation

[0040] 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.

[0041] To facilitate understanding of the battery pack provided in the embodiments of this application, its application scenarios will be introduced first below.

[0042] 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.

[0043] 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.

[0044] like Figure 1As shown, in some current battery packs 01, a plastic support 012 can be provided between two adjacent battery cells 011, thereby forming an airflow channel (not shown in the figure) between the two battery cells 011. Specifically, the plastic support 012 may include multiple ribs 0121, which are arranged in multiple layers, for example, see [reference needed]. Figure 1 In the Z direction, multiple ribs 0121 are arranged in two layers. Ribs in one layer extend along the length of the cell 011 (Y direction in the figure), while ribs in the other layer extend along the width of the cell 011 (X direction in the figure), creating an interlaced grid structure. Placing the plastic bracket 012 between adjacent cells 011 forms an airflow channel. Ribs 0121 can be used to support the surface of the cell 011, creating a perforated airflow channel between adjacent ribs 0121. Air flowing within the airflow channel can carry away heat from the surface of the cell 011, improving its heat dissipation performance. However, the small contact area between the ribs 0121 and the cell 011 can lead to uneven stress on the cell 011 surface, reducing its cycle life and reliability. For example, in lithium-ion cell 011, problems such as insufficient electrolyte, lithium-ion deintercalation, and deposition are prone to occur in areas subjected to greater stress, affecting the working stability and safety of cell 011.

[0045] In addition, since the plastic bracket 012 is prone to deformation, melting and other defects after being heated, if one of the cells 011 experiences heat dissipation runaway, it will have an adverse effect on the adjacent cells 011, thereby causing heat dissipation runaway of the entire battery pack 01, resulting in a low safety factor.

[0046] Therefore, this application provides a battery pack with good heat dissipation and high safety.

[0047] 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.

[0048] 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.

[0049] 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.

[0050] like Figure 2 As shown, this application embodiment provides a battery pack, including a duct assembly 10 and a cell assembly 20. The duct assembly 10 includes a connecting assembly 12 and a plurality of duct plates 11 ( Figure 2 (Six are shown in the image). Multiple air duct panels 11 are laid out in a spaced-out manner. Adjacent air duct panels 11 are fixedly connected by connecting components 12, thereby connecting multiple air duct panels 11 into a single unit. Each air duct panel 11 has a first panel surface 111, and the first panel surface 111 of each air duct panel 11 is located on the same side of the air duct assembly 10 (e.g., ...). Figure 2 (The upper side of the middle). The cell assembly 20 includes multiple cells 21 ( Figure 2 (Six are shown in the diagram), each cell 21 has a first bonding surface 211. The first plate surface 111 is bonded to the first bonding surface 211 one-to-one, and the heat of the cell 21 can be transferred to the air duct plate 11. That is, the air duct assembly 10 can dissipate heat from the cell 21 through heat transfer. In addition, after the first plate surface 111 is bonded to the first bonding surface 211 of the cell 21, a large contact area can be ensured between the air duct plate 11 and the cell 21, avoiding uneven stress on the cell 21, thereby ensuring the safety of the battery pack. The connecting component 12 can be insulated, thus achieving electrical isolation between two adjacent air duct plates 11, which can effectively improve the safety of the battery pack. It should be noted that the multiple air duct plates 11 are arranged in a spaced-apart manner, meaning that the multiple air duct plates 11 are spaced apart along the extension direction of the length and / or width of the air duct plate 11, and the multiple air duct plates 11 are approximately in the same plane, with good flatness.

[0051] In specific configurations, each air duct plate 11 can have an air duct ( Figure 2 (Not shown in the image) The air flowing through the air duct can carry away the heat from the air duct plate 11, thereby cooling the air duct plate 11. In addition, since the air circulates in the air duct of the air duct assembly 10, it can avoid contact between the air and the surface of the battery cell 21. When there are impurities such as dust and moisture in the air, they will not cause corrosion to the outer surface of the battery cell 21, which helps to ensure the safety of the battery cell 21.

[0052] In addition, in the example provided in this application, the air duct component 10 has a modular structure, which facilitates flexible expansion.

[0053] For example, in actual use, the number of air duct plates 11 can be increased or decreased according to usage needs, which provides good flexibility.

[0054] Specifically, the battery cell 21 can be a lithium-ion battery, a sodium-ion battery, or other types. This application does not limit the specific type of the battery cell 21.

[0055] In addition, the shape and structure of the battery cell 21 can also be varied.

[0056] For example, such as Figure 3 As shown in one example provided in this application, the battery cell 21 has a rectangular block structure with a top surface 21a, a bottom surface 21b, and side surfaces 21c, 21d, 21e, and 21f. The top surface 21a has a positive electrode 213, a negative electrode 214, and an explosion-proof valve 215. Side surfaces 21e and 21f have larger areas, providing a larger contact area. Therefore, in practical applications, side surface 21e or 21f can be attached to the first plate surface 111. Having a larger contact area between the battery cell 21 and the air duct plate 11 is beneficial for improving the heat exchange performance and stress resistance between the battery cell 21 and the air duct plate 11.

[0057] Alternatively, it can be understood that the first bonding surface 211 can be the largest surface among the outer surfaces of the cell 21. This largest surface refers to the surface with the largest area among the outer surfaces of the cell 21. Of course, in practical applications, the cell 21 can have one, two, or more largest surfaces. When the cell 21 includes two or more largest surfaces, the first bonding surface 211 can be any one of them. For example, in... Figure 3 In the example provided, the areas of side surface 21e and side surface 21f are basically the same. Moreover, the areas of side surface 21e and side surface 21f are the largest relative to the top surface 21a, bottom surface 21b, side surface 21c and side surface 21d. In practical applications, side surface 21e can be used as the first bonding surface 211.

[0058] Furthermore, since the first bonding surface 211 is a plane, in the example provided in this application, the first plate surface 111 of the air duct plate 11 is also a plane, thereby ensuring the adhesion between the battery cell 21 and the air duct plate 11. Of course, in other examples, the first bonding surface 211 and the first plate surface 111 may also be approximately planes, or they may be curved surfaces, etc., which will not be elaborated here.

[0059] Of course, in other examples, the battery cell 21 can also be a sheet-like structure, and this application does not limit the specific type and shape of the battery cell 21. In practical applications, the first plate surface 111 in the air duct plate 11 can be reasonably set according to the shape of the first bonding surface 211 of the battery cell 21, which will not be elaborated here.

[0060] To facilitate understanding of the technical solution of this application, the following will be used as an example. Figure 3 Taking the battery cell 21 shown in the figure as an example, the specific structure of the battery pack will be explained in detail.

[0061] In specific configurations, the structure of the air duct plate 11 can be varied.

[0062] For example, such as Figure 5 As shown in the example provided in this application, the air duct plate 11 has a flat plate structure with a first plate surface 111 and a second plate surface 112 that are opposite to each other, and both the first plate surface 111 and the second plate surface 112 are planar. In practical applications, the first plate surface 111 can be used as a contact surface for contacting the battery cell 21, or the second plate surface 112 can also be used as a contact surface for contacting the battery cell 21. Alternatively, the first plate surface 111 and the second plate surface 112 can each serve as different contact surfaces.

[0063] Specifically, such as Figure 4 As shown, in another example provided in this application, battery cell assemblies are provided on both sides of the air duct assembly 10. For ease of distinguishing description, one of the battery cell assemblies is defined as the first battery cell assembly 20a, and the other battery cell assembly is defined as the second battery cell assembly 20b.

[0064] Additionally, please refer to the following: Figure 3 and Figure 4 Each cell 21 also has a second bonding surface 212, which is opposite to the first bonding surface 211, and the areas of the first bonding surface 211 and the second bonding surface 212 are substantially the same. It is understood that the first bonding surface 211 and the second bonding surface 212 are used for ease of description; in practical applications, the first bonding surface 211 and the second bonding surface 212 can be used interchangeably.

[0065] In the specific configuration, each air duct plate 11 is correspondingly arranged with two battery cells 21, and the two battery cells 21 are located on both sides of the air duct plate 11. The first plate surface 111 can be bonded to the first contact surface 211 of the battery cell 21 in the first battery cell assembly 20a. The second plate surface 112 can be bonded to the second contact surface 212 of the battery cell 21 in the second battery cell assembly 20b. A single air duct assembly 10 can simultaneously dissipate heat from the first battery cell assembly 20a and the second battery cell assembly 20b located on its two sides, making the battery pack structure more compact and reducing the battery pack volume.

[0066] In specific configurations, the shape of the air duct 110 can be varied.

[0067] For example, such as Figure 5 As shown, in one example provided in this application, the air duct 110 is straight and extends through the first side 113 and the second side 114 of the air duct plate 11. Specifically, the air duct plate 11 has a plurality of parallel air ducts 110, each air duct 110 having a first port ( Figure 5 (not shown in the image) and the second port ( Figure 5 (Not shown in the diagram). The first port of each air duct 110 is located on the first side 113, and the second port of each air duct 110 is located on the second side 114. When air flows within the straight air duct 110, there is less flow resistance, thus ensuring efficient airflow. Furthermore, the straight air duct has the advantage of simple structure, which helps reduce manufacturing difficulty.

[0068] In the actual production process, extrusion molding and other processes can be used to extrude molten or semi-molten metal materials from the mold opening. The extruded metal materials can be solidified after pre-cooling, which has the advantages of simple preparation process, fast preparation speed and low cost.

[0069] Of course, in other examples, the shape of the air duct can also be U-shaped or S-shaped, etc., and this application does not limit this. In addition, the number of air ducts contained in each air duct plate 11 can be one, two or more, and this application does not limit this.

[0070] In addition, in specific implementation, the air duct plate 11 can be a one-piece structure, or the air duct plate 11 can be composed of multiple parts.

[0071] For example, such as Figure 6 and Figure 7 As shown, in one example provided in this application, the air duct plate 11 is composed of a first plate body 115 and a second plate body 116. Specifically, the first plate body 115 has a plate body 1151 and a slot 1152 disposed on the plate body 1151. The second plate body 116 has a plate body 1161 and a protrusion 1162 disposed on the plate body. After the protrusion 1162 is inserted into the slot 1152, the first plate body 115 and the second plate body 116 can be fixedly connected by the tight insertion between the protrusion 1162 and the slot 1152. Alternatively, an air duct 110 can also be formed together.

[0072] Furthermore, in the example provided in this application, the first plate 115 not only has a slot 1152 but also a protrusion 1153. The second plate 116 also has a slot 1163 that engages with the protrusion 1153. It is understood that in other examples, only the slot structure may be provided in the first plate 115, and the protrusion structure may be provided in the second plate 116. Alternatively, only the protrusion structure may be provided in the first plate 115, and the slot structure may be provided in the second plate 116; this application does not limit this. The number of protrusion structures and slot structures can be reasonably adjusted according to actual needs, and this application does not limit this.

[0073] In addition, such as Figure 6 As shown, a partition 1154 is provided in the first plate 115, and a partition 1164 is also provided in the second plate 116. After the first plate 115 and the second plate 116 are fastened and fixed, the surfaces of the partition 1154 and the partition 1164 are tightly fitted together, thereby forming the required air duct 110.

[0074] It is understood that in other examples, the first plate 115 and the second plate 116 can also be fixedly connected by welding, or by fasteners such as screws or rivets. This application does not specifically limit the connection method between the first plate 115 and the second plate 116.

[0075] In addition, in specific applications, the structure of the connecting component 12 can be reasonably set according to the structure of the air duct plate 11.

[0076] For example, such as Figure 8 As shown in the example provided in this application, the connecting component 12 includes a first connector, a second connector, and an auxiliary connector 123.

[0077] Specifically Figure 8 The air duct assembly 10 shown includes four identical air duct plates 11, which are designated as air duct plate 11a, air duct plate 11b, air duct plate 11c, and air duct plate 11d for easy distinction. The connecting assembly 12 includes two identical first connectors 121, which are designated as first connector 121a and first connector 121b for easy distinction. It also includes two identical second connectors 122, which are designated as second connector 122a and second connector 122b for easy distinction.

[0078] Duct plate 11a and duct plate 11b can be fixedly connected by a first connector 121a, and duct plate 11a and duct plate 11d can be fixedly connected by a second connector 122a. Duct plate 11c and duct plate 11b can be fixedly connected by a second connector 122b, and duct plate 11c and duct plate 11d can be fixedly connected by a first connector 121b.

[0079] Specifically, such as Figure 9 As shown, the two opposite sides of the air duct plate 11 have slots 117 and 118 respectively. The two opposite sides of the first connector 121 have protrusions 1211 and 1212 respectively. During connection, slots 117 (118) can be inserted into protrusions 1211 (1212), thereby achieving a fixed connection between the first connector 121 and the air duct plate 11.

[0080] The second connector 122 has protrusions 1221 and 1222. During connection, the protrusions can be inserted into the port. The second connector 122 and the duct plate 11 can be fixedly connected by the tight fit between the protrusions 1221 (1222) and the port of the air duct 110.

[0081] In addition, such as Figure 9 As shown in the example provided in this application, the second connector 122 also has a connecting channel 1220. One end of the connecting channel 1220 extends through to the top surface of the protrusion 1221, and the other end extends through to the top surface of the protrusion 1222. When the second connector 122 is fixedly connected to the air duct plate 11, the air duct 110 in the air duct plate 11 and the connecting channel 1220 in the second connector 122 can communicate with each other. That is, the air duct 110 between the two air duct plates 11 can be connected through the connecting channel 1220 in the second connector 122.

[0082] In summary, the second connector 122 can not only achieve a fixed connection between two adjacent air duct plates 11, but also connect the air ducts 110 in the two adjacent air duct plates 11, which is beneficial to improving the expansion performance of the air duct assembly 10.

[0083] In addition, such as Figure 9 As shown in the example provided in this application, the connecting component 12 further includes an auxiliary connector 123, which can be used to fix two adjacent first connectors 121 and two adjacent second connectors 122.

[0084] Specifically, in the example provided in this application, the auxiliary connector 123 has protrusions 1231 and 1232. The first connector 121 has a slot 1213 and another slot opposite to slot 1213. Figure 9 (Not shown in the image). When making the connection, the protrusion 1231 (1232) can be inserted into the slot 1213. The fixed connection between the auxiliary connector 123 and the first connector 121 can be achieved by the tight insertion between the protrusion 1231 (1232) and the slot 1213.

[0085] Additionally, the auxiliary connector 123 has protrusions 1233 and 1234 on its two opposite sides. The second connector 122 has a slot 1223 and another slot opposite to slot 1223. Figure 9 (Not shown in the image). When making the connection, the protrusion can be inserted into the slot 1223. The fixed connection between the auxiliary connector 123 and the second connector 122 can be achieved by the tight insertion between the protrusion 1233 (1234) and the slot 1223.

[0086] In the example provided in this application, by using the auxiliary connector 123, the connection stability between two adjacent first connectors 121 can be improved, as can the connection stability between two adjacent second connectors 122, thereby improving the structural strength of the entire air duct assembly 10.

[0087] Furthermore, in practical applications, when the duct assembly 10 includes only the duct plate 11 arranged along the X direction, the connecting assembly 12 may include only the first connector 121. When the duct assembly 10 includes only the duct plate 11 arranged along the Y direction, the connecting assembly 12 may include only the second connector 122.

[0088] In specific configurations, one, two, or more air duct plates 11 can be installed along the X direction. Correspondingly, one, two, or more air duct plates 11 can be installed along the Y direction. The number and location of the air duct plates 11 can be reasonably configured according to actual needs, and this application does not impose any restrictions on this.

[0089] For example, such as Figure 2 As shown, in one example provided in this application, the battery pack may include six battery cells 21. The air duct assembly 10 may include six air duct plates 11.

[0090] Specifically, six air duct plates 11 are spaced apart, and adjacent air duct plates 11 are fixedly connected by connecting components 12. Six battery cells 21 are spaced apart, and each of the six battery cells 21 corresponds to one of the six air duct plates 11.

[0091] In its specific design, the air duct plate 11 can be made of metals such as aluminum, copper, and alloys to give the heat-conducting plate good thermal conductivity and stress resistance. Furthermore, the air duct plate 11 is not easily deformed when subjected to high temperatures, thus ensuring the safety of the battery pack.

[0092] In addition, the connecting component 12 can be made of insulating materials such as polyethylene and polypropylene to give it better insulation performance.

[0093] In the example provided in this application, since adjacent air duct plates 11 are connected by connecting components 12, the connecting components 12 can effectively isolate adjacent air duct plates 11. When a cell 21 in the battery pack experiences current leakage due to high temperature or impact, the current may leak into the air duct plate 11 it is in contact with. In the example provided in this application, since adjacent air duct plates 11 are isolated by insulated connecting components 12, the current will not propagate between two adjacent air duct plates 11, thus preventing current diffusion and improving the safety of the battery pack.

[0094] In practical applications, a single cell 21 in the battery pack may malfunction, leading to current leakage. Therefore, in the example provided in this application, the cells 21 in the battery pack are spaced apart, resulting in gaps between adjacent cells 21. When current exists on the outer surface of one cell 21, it is not easily conducted to adjacent cells 21. Furthermore, since adjacent air duct plates 11 are connected by an insulated connecting assembly 12, when a cell 21 experiences current leakage, the current will not be conducted through the air duct plate 11 to other air duct plates 11 or cells 21, thus preventing adverse effects on other cells 21.

[0095] In addition, in the example provided in this application, the battery cell 21 and the air duct plate 11 are arranged in a one-to-one correspondence. Therefore, in order to ensure the relative position between the battery cell 21 and the air duct plate 11, a partition is also provided in the connecting assembly 12.

[0096] like Figure 9 As shown, specifically, the first connector 121 has a partition 1214, and the auxiliary connector 123 has a partition 1235. In practical applications, the partition 1214 can be located in the gap between two adjacent battery cells 21. The partition 1235 can be located in the gap between two adjacent battery cells 21, thereby enabling the battery cells 21 to be positioned.

[0097] Of course, in practical applications, a partition can also be set in the second connector 122, which will not be elaborated here.

[0098] In other examples, each air duct plate 11 may also be composed of multiple components.

[0099] For example, such as Figure 10 As shown, in another example provided in this application, the duct plate 11 may also include multiple splicing plates 1111 and splicing components 1112. The multiple splicing plates 1111 can be laid out in a spaced-apart manner, and adjacent splicing plates 1111 can be fixedly connected by splicing components 1112. In practical applications, the number and arrangement of the splicing plates 1111 can be flexibly set according to the required area or shape of the duct plate 11, which can improve the applicability and scalability of the duct plate 11.

[0100] In specific configurations, the structure of each splicing panel 1111 can be consistent with... Figure 9 The structure of the air duct plate 11 shown is basically the same. The structure of the splicing component 1112 can be the same as that of the air duct plate 11. Figure 9 The connecting components shown (not shown in the figure) have basically the same structure, and will not be described in detail here.

[0101] Of course, in other examples, the splicing panel 1111 and the splicing component 1112 may also have other shapes and structures, and this application does not limit them.

[0102] Understandably, in other examples, the number of battery cells 21 included in the battery pack may be one, two, or more. Additionally, the number of air duct plates 11 included in the air duct assembly 10 may be two, three, or more; this application does not limit this.

[0103] In addition, in practical applications, the battery pack may also include stacked battery cells 21 and air duct assembly 10 to make reasonable use of the Z-axis space.

[0104] For example, such as Figure 11 As shown, in one example provided in this application, the battery pack has three layers of stacked cell assemblies 20 and four layers of stacked air duct assemblies 10. The air duct assembly 10 and the cell assembly 20 are stacked sequentially along the Z-direction.

[0105] Stacking can effectively increase the energy density of battery packs, reduce their footprint, and facilitate flexible deployment.

[0106] It is understood that, in the example provided in this application, since adjacent air duct plates 11 can be insulated from each other by the first connector 121 and the second connector 122, in the XY plane, when a certain cell 21 causes leakage or liquid leakage, it can be effectively isolated by the connecting component 12.

[0107] In the Z-direction, the air duct assembly 10 can also effectively insulate and isolate two adjacent cells 21.

[0108] For example, such as Figure 12 As shown, in another example provided in this application, the air duct plate 11 has a double-layer structure. Specifically, the air duct plate 11 includes two air duct sub-plates stacked along the thickness direction of the air duct plate 11, namely air duct sub-plate 1113 and air duct sub-plate 1114, and an insulating interlayer 13 is disposed between air duct sub-plate 1113 and air duct sub-plate 1114.

[0109] In practical applications, the insulating interlayer 13 can effectively isolate the air duct sub-plates 1113 and 1114 to prevent mutual interference between them. For example, when current flows through one of the air duct sub-plates 1113, the insulating interlayer can effectively block the current, preventing it from flowing into the air duct sub-plate 1114.

[0110] The insulating interlayer 13 can be made of mica. Mica has high insulation and heat insulation properties, good chemical stability, and resistance to strong acids, strong alkalis, and pressure. Therefore, it can be well applied in battery packs. When there are adverse conditions such as current leakage or electrolyte precipitation in the battery pack, the insulating interlayer 13 can effectively prevent the spread of these adverse conditions, thus helping to improve the safety of the battery pack.

[0111] Of course, in other examples, the insulating interlayer 13 can also be fireproof felt, etc. This application does not limit the specific material of the insulating interlayer 13.

[0112] In addition, such as Figure 13 As shown, in another connection component 12 provided in this application, it is also capable of […]. Figure 12 The two stacked air duct plates 11 shown are connected.

[0113] Specifically, the first connector 121 has a double-layer structure. Two opposing sides of the first connector 121 have two layers of protrusions 1211 and two layers of protrusions 1212, respectively. During connection, the slots 117 (118) of the two stacked duct plates 11 can simultaneously engage with the two layers of protrusions 1211 (1212), thereby achieving a fixed connection between the first connector 121 and the duct plate 11.

[0114] The second connector 122 is still a single-layer structure.

[0115] The auxiliary connector 123 has a double-layer structure, with two opposing sides each having two layers of protrusions 1231 and two layers of protrusions 1232. The first connector 121 has two layers of slots 1213. During connection, the protrusions 1231 (1232) can be inserted into the slots 1213. The tight connection between the protrusions 1231 (1232) and the slots 1213 achieves a fixed connection between the auxiliary connector 123 and the first connector 121.

[0116] In addition, the two opposite sides of the auxiliary connector 123 have two layers of protrusions 1233 and two layers of protrusions 1234 respectively. During connection, the auxiliary connector 123 can be connected to the slots 1223 of the two second connectors 122 simultaneously.

[0117] In the example provided in this application, both the first connector 121 and the auxiliary connector 123 adopt a double-layer structure, which can reduce the number of parts used and improve assembly efficiency when assembling the connecting assembly 12.

[0118] Understandably, in other examples, a duct assembly 10 can also be provided between two adjacent cells 21 in the X direction. Alternatively, a duct assembly 10 can also be provided between two adjacent cells 21 in the Y direction.

[0119] In addition, such as Figure 14 As shown in the example provided in this application, the battery pack also includes a housing, an air duct assembly, and a battery cell 21 disposed within the housing, so that the housing can effectively protect the battery cell 21 and the air duct assembly.

[0120] like Figure 14 and Figure 15 As shown, in the example provided in this application, the housing is formed by four side plates 14, a bottom plate 15, and a fan assembly 16. The air ducts in each air duct plate 11 extend in the direction of a first direction (e.g., ...). Figure 15 The air ducts in the air duct plate 11 are parallel to each other in the X direction, and in this first direction, the air ducts are connected.

[0121] The base plate 15 has a slit 151, which communicates with the air duct (not shown) in the air duct assembly 10. The fan assembly 16 has a fan 161 located in the first direction. The fan 161 can make the outside air flow quickly through the air duct, thereby quickly removing the heat in the air duct assembly 10, so as to improve the heat dissipation performance of the battery pack.

[0122] In practical applications, battery packs can be used in scenarios such as home energy storage, industrial energy storage, data centers, and vehicles to store and release electrical energy.

[0123] For example, such as Figure 16 As shown in the illustration, this application also provides an energy storage system, which may include an inverter and a battery pack. 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.

[0124] 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.

[0125] Or, such as Figure 17 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.

[0126] 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.

[0127] Or, such as Figure 18 As shown in the illustration, this application embodiment also provides a charging network, including a charging pile 30 and a battery pack. The charging pile 30 and the battery pack are electrically connected via a cable, and the battery pack can provide its stored electrical energy to the charging pile 30. The charging pile 30 has a connector 31, 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.

[0128] In a specific setup, the charging network can include multiple battery packs and multiple charging piles 30. Each battery pack can provide power to multiple charging piles 30, thereby effectively improving the flexibility of deployment.

[0129] 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 in that, Includes air duct assembly (10) and first cell assembly (20a); The air duct assembly (10) includes a connecting component (12) and a plurality of air duct plates (11). The plurality of air duct plates (11) are laid out in a spaced-out manner. Two adjacent air duct plates (11) laid out in a spaced-out manner are fixedly connected by the connecting component (12), and the connecting component (12) is insulated. Each of the air duct plates (11) has a first plate surface (111), and the first plate surface (111) of each of the air duct plates (11) is located on the same side of the air duct assembly (10); The first cell assembly (20a) includes a plurality of cells (21), each of the cells (21) having a first bonding surface (211); The number of battery cells (21) is the same as the number of air duct plates (11), and the first plate surface (111) of the plurality of air duct plates (11) is bonded to the first bonding surface (211) of the plurality of battery cells (21) in a one-to-one correspondence. Each of the aforementioned air duct plates (11) has an air duct (110), and the air ducts (110) of the plurality of said air duct plates (11) arranged along the first direction are connected; Wherein, the first direction is the extension direction of the air duct (110) inside the air duct plate (11).

2. The battery pack according to claim 1, characterized in that, Each of the aforementioned air duct plates (11) has a second plate surface (112), and the second plate surface (112) is opposite to the first plate surface (111); The battery pack also includes a second cell assembly (20b), which includes a plurality of cells (21), each of the cells (21) having a second bonding surface (212). In this assembly, the number of cells (21) in the second cell assembly (20b) is the same as the number of air duct plates (11), and the second plate surface (112) of the plurality of air duct plates (11) is bonded to the second bonding surface (212) of the plurality of cells (21) in a one-to-one correspondence.

3. The battery pack according to claim 1 or 2, characterized in that, The battery pack includes a plurality of air duct components (10) and a plurality of battery cell components (20), and the plurality of air duct components (10) and the plurality of battery cell components (20) are arranged alternately in sequence along the thickness direction of the air duct plate (11), and the plurality of battery cell components (20) includes the first battery cell component (20a).

4. The battery pack according to claim 1 or 2, characterized in that, The first bonding surface (211) is the largest surface or one of the largest surfaces on the outer surface of the battery cell.

5. The battery pack according to claim 2, characterized in that, Each of the battery cells (21) has a first bonding surface (211) and a second bonding surface (212), and the first bonding surface (211) and the second bonding surface (212) are opposite to each other.

6. The battery pack according to claim 1 or 2, characterized in that, The connecting assembly (12) includes a first connector (121) which is connected between two adjacent air duct plates (11).

7. The battery pack according to claim 6, characterized in that, The connection component (12) includes a second connector (122) having a connection channel (1220); The second connector (122) is connected between two adjacent air duct plates (11) arranged along the first direction, and the air ducts (110) of the two adjacent air duct plates (11) are connected to the connecting channel (1220).

8. The battery pack according to claim 7, characterized in that, The connecting component (12) also includes an auxiliary connector (123); The auxiliary connector (123) is located between two adjacent first connectors (121) and between two adjacent second connectors (122), and is used to fix the two adjacent first connectors (121) and the two adjacent second connectors (122).

9. The battery pack according to claim 1 or 2, characterized in that, The air duct plate (11) includes a first plate (115) and a second plate (116) that are interlocked with each other. The first plate surface (111) is located in the first plate body (115), and the second plate surface (112) which is opposite to the first plate surface (111) is located in the second plate body (116).

10. The battery pack according to claim 1 or 2, characterized in that, Includes a housing and a fan (161), with the air duct assembly (10) and the battery cell (21) disposed within the housing; The fan (161) is located in a first direction and is used to accelerate the airflow speed in the air duct (110); wherein, the first direction is the extension direction of the air duct (110) in the air duct plate (11).

11. The battery pack according to claim 1 or 2, characterized in that, The air duct plate (11) further includes at least two air duct sub-plates (1113, 1114) stacked along the thickness direction of the air duct plate (11) and an insulating interlayer (13), the insulating interlayer (13) being located between two adjacent air duct sub-plates (1113, 1114).

12. The battery pack according to claim 1 or 2, characterized in that, The air duct plate (11) includes multiple splicing plates (1111) and splicing components (1112); Multiple splicing panels (1111) are laid out in a flat manner with intervals, and two adjacent splicing panels (1111) are fixedly connected by splicing components (1112).

13. An energy storage system, characterized in that, Includes an inverter and a battery pack as described in any one of claims 1 to 11, 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.

14. A power station, characterized in that, It includes a power generation device and a battery pack as described in any one of claims 1 to 11, 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.

15. A charging network, characterized in that, It includes a charging pile and a battery pack as described in any one of claims 1 to 11, 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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