Battery devices, energy storage systems and electrical equipment

Abstract

The present application relates to the field of energy storage technology, and discloses a battery device, an energy storage system, and an electrical equipment. The battery device includes a cell assembly, a CCS assembly, and an isolation structure. The cell assembly includes a plurality of cells arranged in sequence along a first direction, a first positioning member and a second positioning member that clamp the plurality of cells in the middle, and a binding member that binds the plurality of cells, the first positioning member, and the second positioning member together. Each cell includes a top surface and a bottom surface that are relatively arranged along a second direction, the top surface of the cell having a pole and an explosion-proof valve, and the second direction is perpendicular to the first direction. The CCS assembly is arranged on the top surfaces of the plurality of cells, and the CCS assembly is electrically connected to the pole of each cell and exposes the explosion-proof valve of each cell. The isolation structure includes an isolation portion that covers the top surfaces of the plurality of cells, and an installation portion that is connected to the cells. The battery device, energy storage system, and electrical equipment provided by the present application can help ensure the working performance of the battery device.

Description

Technical Field

[0001] The present application relates to the field of energy storage technology, and in particular to a battery device, an energy storage system, and an electrical device. Background Art

[0002] With the continuous development of new energy technologies, energy storage systems are becoming increasingly widely used. Energy storage systems use battery devices composed of single cells to store electrical energy and output it when needed. Single cells have charge-discharge cycle characteristics, capable of switching between charged and discharged states. As a critical component of energy storage systems, the performance of battery devices impacts their performance.

[0003] In addition to individual cells, battery devices also include other components that work with them. When assembling these cells into a battery device, it's crucial to ensure the coordination of these components to maintain overall device performance. Therefore, designing the battery device structure to ensure optimal performance is a crucial issue. Summary of the Invention

[0004] The purpose of the embodiments of the present application is to provide a battery device, an energy storage system, and an electrical device that can help ensure the working performance of the battery device.

[0005] In order to solve the above technical problems, an embodiment of the present application provides a battery device. The battery device includes a battery cell assembly, a CCS assembly and an isolation structure. The battery cell assembly includes a plurality of battery cells arranged in sequence along a first direction, a first positioning member and a second positioning member clamping the plurality of battery cells in the middle, and a binding member binding the plurality of battery cells, the first positioning member and the second positioning member together. Each battery cell includes a top surface and a bottom surface arranged opposite to each other along a second direction, the top surface of the battery cell has a pole and an explosion-proof valve, and the second direction is perpendicular to the first direction. The CCS assembly is arranged on the top surfaces of the plurality of battery cells, the CCS assembly is electrically connected to the pole of each battery cell, and the explosion-proof valve of each battery cell is exposed. The isolation structure includes an isolation part covering the top surfaces of the plurality of battery cells, and a mounting part connected to the battery cells. The isolation part is supported on the top surfaces of the plurality of battery cells via the mounting part, and forms a gap with the top surfaces of the plurality of battery cells to accommodate the CCS assembly.

[0006] Embodiments of the present application also provide an energy storage system. The energy storage system includes a housing and the aforementioned battery device. The housing is provided with a receiving cavity. The battery device is disposed within the receiving cavity.

[0007] An embodiment of the present application further provides an electrical device, which includes the above-mentioned battery device.

[0008] The battery device, energy storage system and electrical equipment provided by the embodiments of the present application respectively arrange CCS components and isolation structures on the top surfaces of multiple battery cells in the battery cell assembly. The isolation structure includes a connected isolation part and an installation part, the isolation part is covered on the top surfaces of the multiple battery cells to play an isolation role, and the installation part is connected to the battery cells. At the same time, the isolation part is supported by the installation part. The stability of the isolation part can be ensured by the connection between the installation part and the battery cell, and then the connection relationship formed between the isolation structure and the battery cell can be utilized to enable the isolation structure to bypass the CCS component and be assembled on the battery cell assembly, and the structural stability of the battery cell can be utilized to improve the reliability of the isolation structure. At the same time, it can avoid adverse effects on the CCS component. Thereby ensuring the safety of the battery device during use and improving the performance of the battery device.

[0009] In some embodiments, the mounting portion includes a main body portion and a connecting portion, wherein at least a portion of the main body portion is inserted between two adjacent battery cells, and the connecting portion and the isolating portion are integrally formed or snap-connected with each other. In this way, the main body portion can be used to connect the mounting portion to the battery cells, while the connecting portion can be used to connect the mounting portion to the isolating portion.

[0010] In some embodiments, the CCS assembly includes a wiring harness isolation plate positioned over the top surface of multiple battery cells. The isolation plate is provided with holes for bypassing explosion-proof valves. The main body is located on the side of the isolation plate closest to the battery cells, and the connector extends through the isolation plate and engages with the isolation portion. This allows the main body to be positioned closer to the battery cells, making it easier to insert the main body between two adjacent battery cells, and the clamping force between the two adjacent battery cells secures the mounting portion.

[0011] In some embodiments, the connection portion and the explosion-proof valves of two adjacent battery cells are located in a straight line, and the vias on the harness isolation plate located on both sides of the connection portion are connected together, isolating the connection portion between the explosion-proof valves of the two adjacent battery cells. In this way, the connection portion can serve as an isolation between the explosion-proof valves of the two adjacent battery cells, isolating objects discharged by the explosion-proof valves.

[0012] In some embodiments, an extension portion is provided protruding from at least one side of the main body, extending in a direction parallel to the first direction and contacting the top surface of the battery cell. This allows the extension portion to form contact with the top surface of the battery cell, increasing the contact area between the mounting portion and the battery cell and ensuring stability during connection between the mounting portion and the battery cell.

[0013] In some embodiments, the mounting portion further includes a first portion and a second portion, the first portion and the second portion being disposed oppositely at opposite ends of the main body, each of the first portion and the second portion abutting against at least one of two adjacent battery cells. In this manner, the first portion and the second portion at opposite ends of the main body can form a locking engagement with the battery cell, thereby restricting the connection position of the mounting portion.

[0014] In some embodiments, a clip is provided on one end of the connecting portion away from the main body, and the isolating portion is provided with a mounting hole. The clip passes through the mounting hole and abuts against the side of the isolating portion away from the plurality of battery cells. This facilitates mounting the isolating portion on the mounting portion through the engagement between the clip and the mounting hole, thereby forming a single unit with the battery cells.

[0015] In some embodiments, the connecting portion is provided with a channel extending through the first direction, so that a path for guiding the flow of discharged material can be formed through the channel on the connecting portion, thereby improving the stability of the battery cell during use.

[0016] In some embodiments, there are multiple connecting parts, and the multiple connecting parts are arranged on the main body at intervals. In this way, the number of matching positions can be increased through the multiple connecting parts, ensuring the tightness when the connecting parts are connected to the isolation part.

[0017] In some embodiments, the battery device further includes a cell thermal insulation pad positioned between two adjacent battery cells, with at least a portion of the cell thermal insulation pad spaced apart from the top surface of the battery cell. This allows the cell thermal insulation pad to cooperate with the cell thermal insulation pad to create a reserved gap between adjacent battery cells, facilitating assembly of the main body.

[0018] In some embodiments, the maximum distance between the edge of at least a portion of the battery cell thermal insulation pad and the top surface of the battery cell is 5 mm to 7 mm. Thus, by controlling the maximum distance between the edge of the battery cell thermal insulation pad and the top surface of the battery cell to 5 mm to 7 mm, sufficient contact area can be ensured between the mounting portion and the battery cell, ensuring that the battery cell exerts sufficient clamping force on the mounting portion.

[0019] In some embodiments, the distance between the main body and the battery cell thermal insulation pad is 0.2 mm to 1 mm. In this way, by controlling the distance between the main body and the battery cell thermal insulation pad, interference between the main body and the battery cell thermal insulation pad can be avoided, and the assembly gap between two adjacent battery cells can be effectively utilized.

[0020] In some embodiments, there are multiple mounting portions, and the multiple mounting portions are spaced apart from each other in the first direction. In this way, the stability of the connection structure formed between the isolation portion and the battery cell can be ensured by providing multiple mounting portions. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] One or more embodiments are exemplarily illustrated by pictures in the corresponding drawings. These exemplifications do not constitute limitations on the embodiments. Elements with the same reference numerals in the drawings are represented as similar elements. Unless otherwise stated, the figures in the drawings do not constitute proportional limitations.

[0022] Figure 1 is a schematic diagram of the three-dimensional structure of a battery device provided in some embodiments of the present application;

[0023] Figure 2 yes Figure 1 Schematic diagram of the enlarged structure at A in the middle;

[0024] Figure 3 is a schematic structural diagram of a battery device provided in some embodiments of the present application without an isolation portion installed;

[0025] Figure 4 1 is a schematic structural diagram of a wiring harness isolation plate of a CCS assembly in a battery device provided in some embodiments of the present application;

[0026] Figure 5 is a schematic structural diagram of a cell of a cell assembly in a battery device provided in some embodiments of the present application;

[0027] Figure 6 is a schematic diagram of the matching structure of the battery cell and the mounting portion of the isolation structure in the battery device provided in some embodiments of the present application;

[0028] Figure 7 This is a schematic diagram of the matching structure of the battery cell thermal insulation pad and the mounting portion of the isolation structure in the battery device provided in some embodiments of the present application;

[0029] Figure 8 is a structural schematic diagram of the installation portion of the isolation structure in the battery device provided in some embodiments of the present application;

[0030] Figure 9 yes Figure 8 Schematic diagram of the enlarged structure at B in the middle;

[0031] Figure 10 is a structural schematic diagram of the installation portion of the isolation structure in the battery device provided in other embodiments of the present application;

[0032] Figure 11 yes Figure 10 Schematic diagram of the enlarged structure at C in the middle;

[0033] Figure 12 is a structural schematic diagram of the installation portion of the isolation structure in the battery device provided in some other embodiments of the present application;

[0034] Figure 13 yes Figure 12 Schematic diagram of the enlarged structure at D in the middle;

[0035] Figure 14 Schematic diagram of the spacing of the top surface of the battery cell of the battery cell thermal insulation pad in the battery device provided in some embodiments of the present application;

[0036] Figure 15 Schematic diagram of the structure of a battery cell thermal insulation pad in a battery device provided in other embodiments of the present application;

[0037] Figure 16 This is a schematic structural diagram of a battery cell thermal insulation pad in a battery device provided in some other embodiments of the present application. DETAILED DESCRIPTION

[0038] In order to make the purpose, technical solutions and advantages of the embodiments of the present application clearer, each embodiment of the present application will be described in detail below with reference to the accompanying drawings. However, it will be understood by those skilled in the art that in each embodiment of the present application, many technical details are proposed in order to enable the reader to better understand the present application. However, even without these technical details and various changes and modifications based on the following embodiments, the technical solutions claimed in the present application can be implemented. The division of the following embodiments is for convenience of description and should not constitute any limitation on the specific implementation of the present application. The various embodiments can be combined with each other and referenced to each other under the premise of no contradiction.

[0039] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the art to which this application belongs; the terms used herein are for the purpose of describing specific embodiments only and are not intended to limit this application; the terms "including" and "having" and any variations thereof in the specification and claims of this application and the above-mentioned figure descriptions are intended to cover non-exclusive inclusions.

[0040] In the description of the embodiments of the present application, unless otherwise expressly specified or limited, technical terms such as "installed," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integration; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; and they can refer to internal connectivity between two components or interaction between two components. Those skilled in the art can understand the specific meanings of the above terms in the embodiments of the present application based on specific circumstances.

[0041] As energy storage becomes increasingly important, the performance of energy storage systems is receiving increasing attention. Energy storage systems utilize battery cells, or single cells, assembled into modules, which are then packaged to form electrochemical energy storage systems. Multiple battery cells can be connected in series or parallel, resulting in a battery assembly that incorporates multiple cells using a specific packaging format. An energy storage system can utilize one or more battery units, with a specific number of battery units forming a battery cluster for unified management and control. Multiple battery units can be packaged in a box of a certain size to form a battery pack, or they can be packaged in a larger container to form a containerized energy storage system. Multiple battery units can be managed and controlled collaboratively using a battery management system and a thermal management system.

[0042] When assembling multiple battery cells, an isolation structure is often designed for protection. For example, in a battery pack, the thermal insulation sheet located above the CCS (Cell Connection System) assembly is a crucial isolation component. The thermal insulation sheet is typically made of mica and features a thinned or semi-hollowed portion corresponding to the explosion-proof holes on the top surface of the battery cell. If high-temperature electrolyte is ejected from a battery cell experiencing thermal runaway, the electrolyte can be ejected through the thinned or semi-hollowed portion of the thermal insulation sheet. The thermal insulation sheet isolates the ejected electrolyte, preventing thermal runaway from spreading and affecting other battery cells.

[0043] The design of the isolation component impacts the performance and safety of the battery assembly. In the prior art, a thermal insulation sheet is placed on top of the battery cell, overlying the CCS assembly. The insulation sheet is provided with rivet holes, through which the rivets secure the insulation sheet to the CCS assembly. However, using rivets to secure the insulation sheet requires a certain amount of pressure and force to force the rivets through the isolation plate (i.e., the insulation sheet) and secure it in place. Improper operation, excessive force, or inaccurate rivet placement can easily cause mechanical damage to the underlying CCS assembly, such as crushing and scratching, impacting its performance and service life. Furthermore, battery packs may experience various vibrations during use. Under these conditions, the rivets may gradually loosen, compromising the insulation sheet's securement. This ultimately results in the insulation sheet failing to effectively isolate the battery and may even cause the isolation plate to fall off, posing a threat to the safety of the CCS assembly and the entire battery pack. At the same time, using clips to fix requires one by one, and ensuring that each clip is installed in place and fixed firmly requires a certain amount of operating space and skills. Compared with some other simple fixing methods, the installation process is more cumbersome and will reduce the assembly efficiency of the battery pack.

[0044] In order to improve the safety of the battery device during use and ensure the performance of the battery device, some embodiments of the present application provide a battery device. The isolation structure in the battery device is assembled through a mounting portion that cooperates with the battery cell. When the isolation structure is installed, the isolation portion of the isolation structure can be supported above the CCS component by the mounting portion. This can simplify the installation form of the isolation structure and avoid adverse effects on the CCS component when installing the isolation structure. At the same time, coordinating the isolation structure with the battery cell can improve the stability of the isolation structure during installation.

[0045] The following combination Figures 1 to 16 The structure of the battery device provided by some embodiments of the present application is described.

[0046] like Figures 1 to 16 As shown, the battery device provided by some embodiments of the present application includes a cell assembly 11, a CCS assembly 12 and an isolation structure 13. The cell assembly 11 includes a first direction ( Figure 1 A plurality of battery cells 111 are sequentially arranged in the direction indicated by the arrow X in the middle), a first positioning member 112 and a second positioning member 113 for clamping the plurality of battery cells 111 in the middle, and a binding member 114 for binding the plurality of battery cells 111, the first positioning member 112 and the second positioning member 113 together. Each battery cell 111 includes a plurality of battery cells 111 arranged in the direction indicated by the arrow X in the middle, a first positioning member 112 and a second positioning member 113 for clamping the plurality of battery cells 111 in the middle, and a binding member 114 for binding the plurality of battery cells 111, the first positioning member 112 and the second positioning member 113 together. Figure 1 The top surface 101 and bottom surface 102 are arranged relative to each other (in the direction indicated by the arrow Y in the middle). The top surface 101 of the battery cell 111 has a pole 103 and an explosion-proof valve 104. The second direction is perpendicular to the first direction. The CCS assembly 12 is arranged on the top surface 101 of the multiple battery cells 111. The CCS assembly 12 is electrically connected to the pole 103 of each battery cell 111 and exposes the explosion-proof valve 104 of each battery cell 111. The isolation structure 13 includes an isolation portion 131 covering the top surface 101 of the multiple battery cells 111, and a mounting portion 132 connected to the battery cells 111. The isolation portion 131 is supported on the top surface 101 of the multiple battery cells 111 via the mounting portion 132 and forms a gap with the top surface 101 of the multiple battery cells 111 to accommodate the CCS assembly 12.

[0047] The battery cell assembly 11 is a key part of the battery device that plays the role of energy storage. The battery cell assembly 11 is formed by assembling multiple battery cells 111. Multiple battery cells 111 can be arranged along the same direction to ensure the structural stability after assembly. The number of battery cell assemblies 11 in the same battery device can be one or more. Figure 1The battery device shown has two rows of battery cells 111. The battery cells 111 can be square-cased secondary batteries to effectively utilize space and increase the capacity of the battery device. A thermal insulation pad can be placed between two adjacent battery cells 111 arranged in the same direction. This pad blocks heat transfer across the thickness of the battery cells 111, preventing thermal runaway in some battery cells 111 from spreading to other adjacent battery cells 111. A thermal insulation pad can also be placed between two adjacent rows of battery cells 111 to block heat transfer across the width of the battery cells 111.

[0048] The first positioning member 112 and the second positioning member 113 are parts for limiting the multiple battery cells 111. The first positioning member 112 and the second positioning member 113 can be in the form of end plates. Different positioning members cooperate with the binding member 114 to fix the multiple battery cells 111. The binding member 114 surrounds the multiple battery cells 111 for a week, binding the multiple battery cells 111 and different positioning members together to form a whole. The binding member 114 can be a strap, a cable tie or a packing tape, and the number of the binding members 114 can be set to multiple. In actual situations, the binding member 114 can be a steel belt with higher strength.

[0049] The top surface 101 and bottom surface 102 of the battery cell 111 are the two surfaces in the height direction of the battery cell 111. The top surface 101 of the battery cell 111 has a positive and negative electrode structure 103, as well as an explosion-proof valve 104 structure. The positive and negative electrode structures 103 correspond to the positive and negative poles of the battery cell 111, respectively. The battery cell 111 can be connected to the energy storage system via a connecting cable or connecting piece. The explosion-proof valve 104 structure corresponds to the pressure relief portion of the battery cell 111. In special circumstances, it can form a pressure relief channel to prevent safety hazards during the use of the battery cell 111.

[0050] The CCS assembly 12 can connect multiple battery cells 111 in series or in parallel to transmit current. It can also collect operating data. For example, the CCS assembly 12 can use a thermistor to collect the temperature of the battery cell 111, or it can collect data such as the voltage of the battery cell 111, thereby facilitating monitoring of the status of the battery cell 111. The collection assembly can use an aluminum bar to connect to the pole 103 on the top surface 101 of the battery cell 111. The aluminum bar can be welded to the pole 103 of the battery cell 111 to collect operating data from each battery cell 111. The collection assembly also transmits the collected data of each battery cell 111 to the outside through a line formed by a cable, and can be provided with a connection interface to connect different battery devices to the overall circuit.

[0051] The isolation structure 13 is arranged around the battery cells 111 to protect them. It provides thermal insulation on the outside of the battery cell assembly 11. Furthermore, the isolation structure 13 can be equipped with a pressure relief structure at a location corresponding to the explosion-proof valve 104 on the top surface 101 of the battery cells 111. This allows high-pressure gas or liquid to be released through the pressure relief structure if thermal runaway occurs in some of the battery cells 111, thereby preventing it from affecting other battery cells 111.

[0052] The isolation structure 13 includes an isolation portion 131 and a mounting portion 132. The isolation portion 131 is covered on the top surface 101 of the multiple battery cells 111 to play an isolation role. The projection of the isolation portion 131 in the second direction can exceed the outer contour edge of the multiple battery cells 111 to completely cover the area where the multiple battery cells 111 are located. The mounting portion 132 can be connected to at least part of the battery cells 111 in the battery cell assembly 11 by adopting the form of bonding, snapping or wrapping, and can support the isolation portion 131 in a certain area on the top of the multiple battery cells 111. At the same time, the isolation portion 131 is spaced apart from the top surface 101 of the battery cell 111 to avoid the assembly area of ​​the CCS assembly 12.

[0053] In actual situations, the isolation part 131 and the installation part 132 can adopt an integrally formed structure, or they can be connected to form a whole with a split structure. The isolation part 131 is formed by a heat insulation board, and the material can be a mica sheet. When thermal runaway occurs in some battery cells 111, the high-temperature electrolyte inside the battery cell 111 will be released through the explosion-proof valve 104 position, and the released electrolyte will break through the isolation part 131 and fall on the side surface of the isolation part 131 away from the battery cell 111. Therefore, the isolation part 131 can play an isolation role, reducing the phenomenon that the high-temperature electrolyte falls on other battery cells 111 and causes thermal runaway to spread to other battery cells 111. The isolation part 131 can be provided with a thinned area or a semi-hollow pressure relief groove at the position of the explosion-proof valve 104 of the corresponding battery cell 111, so that the discharged material can break through the isolation part 131.

[0054] In some embodiments of the present application, a battery device is provided in which a CCS assembly 12 and an isolation structure 13 are arranged on the top surface 101 of multiple battery cells 111 in a battery cell assembly 11. The isolation structure 13 includes a connected isolation portion 131 and a mounting portion 132. The isolation portion 131 covers the top surface 101 of the multiple battery cells 111 to provide isolation, while the mounting portion 132 is connected to the battery cells 111. Simultaneously, the isolation portion 131 is supported by the mounting portion 132. The connection between the mounting portion 132 and the battery cells 111 ensures the stability of the isolation portion 131. Furthermore, the connection between the isolation structure 13 and the battery cells 111 allows the isolation structure 13 to be assembled on the battery cell assembly 11, bypassing the CCS assembly 12. This improves the reliability of the isolation structure 13 by leveraging the structural stability of the battery cells 111. At the same time, it prevents any adverse effects on the CCS assembly 12. This ensures the safety of the battery device during use and improves its performance.

[0055] In some embodiments, the mounting portion 132 includes a connected main body portion 1321 and a connecting portion 1322 , at least a portion of the main body portion 1321 is inserted between two adjacent battery cells 111 , the connecting portion 1322 is integrally formed with the isolation portion 131 , or the connecting portion 1322 is snap-connected with the isolation portion 131 .

[0056] In other words, the reserved assembly gap between two adjacent battery cells 111 can be utilized to connect the mounting portion 132 to the battery cells 111 using the assembly gap and the main body 1321 located within the gap. The main body 1321 is the portion where the mounting portion 132 mates with the battery cells 111, while the connecting portion 1322 is the portion where the mounting portion 132 mates with the isolation portion 131. The main body 1321 can be partially or fully inserted between two adjacent battery cells 111, and the squeezing effect of the two adjacent battery cells 111 on the main body 1321 effectively secures the mounting portion 132 to the battery cell assembly 11.

[0057] The connecting portion 1322 is a protruding structure formed on the main body 1321. The connecting portion 1322 can be integrally formed with the isolation portion 131 or snap-fitted. To ensure a strong connection between the connecting portion 1322 and the isolation portion 131, the mounting portion 132 and the isolation portion 131 can be integrally formed. To enhance ease of installation of the isolation structure 13, the isolation portion 131 can be assembled to the mounting portion 132 using a snap-fit ​​mechanism.

[0058] like Figure 2 and Figure 3As shown, the CCS assembly 12 may include a wiring harness isolation plate 121 covering the top surface 101 of the plurality of battery cells 111. The wiring harness isolation plate 121 is provided with a through hole 1211 for bypassing the explosion-proof valve 104. The main body 1321 is located on the side of the wiring harness isolation plate 121 close to the battery cells 111. The connecting portion 1322 passes through the wiring harness isolation plate 121 and engages with the isolation portion 131.

[0059] The wiring harness isolation plate 121 can play an insulating role on the top surface 101 of multiple battery cells 111 and can provide a basis for the layout of the wiring harness. The wiring harness isolation plate 121 is provided with a through hole 1211 at the position of the explosion-proof valve 104 of the battery cell 111 to form an avoidance space. The main body 1321 in the installation part 132 that cooperates with the battery cell 111 is located on the side of the wiring harness isolation plate 121 close to the battery cell 111, and the connecting part 1322 passes through the wiring harness isolation plate 121 and is connected to the isolation part 131. By placing the main body 1321 on the side of the wiring harness isolation plate 121 close to the battery cell 111, the connection between the main body 1321 and the battery cell 111 can be easily achieved. At the same time, the main body 1321 can also be limited by the wiring harness isolation plate 121 so that the main body 1321 is effectively fixed on the side of the wiring harness isolation plate 121 close to the multiple battery cells 111.

[0060] In actual situations, the snap connection can take a variety of forms, such as the form of shaft-hole matching, the form of protrusion and groove matching, or the form of buckle and slot matching. The harness isolation plate 121 can be connected and fixed to the positioning piece on the outside of the battery cell 111. At the same time, a bar 122 can be provided on the harness isolation plate 121 to connect two adjacent battery cells 111, and a connecting cable or a connecting plate 123 can be provided to connect to the bar 122 connecting each battery cell 111. A connector 124 can be provided at the end of the connecting plate 123 to connect the battery device to the overall circuit of the energy storage system. The bar 122 can be limited by a guide column provided on the harness isolation plate 121.

[0061] In some embodiments, guide posts can be provided on the wiring harness isolation plate 121, and guide holes can be provided on the isolation portion 131. The guide posts on the wiring harness isolation plate 121 can pass through the guide holes in the isolation portion 131, so that when the isolation structure 13 is installed, the guide posts and the guide holes cooperate to guide the isolation portion 131. Furthermore, a buckle can be provided on the top of the guide post to limit the isolation portion 131.

[0062] In addition, the connection portion 1322 of the installation portion 132 can be located in a straight line with the explosion-proof valves 104 of two adjacent battery cells 111, and the vias on both sides of the connection portion 1322 on the wiring harness isolation plate 121 are connected together, and the connection portion 1322 is isolated between the explosion-proof valves 104 of the two adjacent battery cells 111.

[0063] In other words, the connection portion 1322 can also isolate the battery cell assembly 11. The connection portion 1322 can separate the area between the explosion-proof valves 104 of two adjacent battery cells 111 on the wiring harness isolation plate 121. Thus, the connection portion 1322 can prevent the two adjacent battery cells 111 from interfering with each other.

[0064] like Figure 4 As shown, the wiring harness isolation plate 121 is provided with corresponding vias 1211 in the explosion-proof valve 104 area of ​​each battery cell 111. At the location of the mounting portion 132 corresponding to some battery cells 111, two adjacent vias 1211 on the wiring harness isolation plate 121 are connected together to form a large, runway-shaped hollow area 1212. Hollow area 1212 can avoid the connection portion 1322 of the mounting portion 132, making the connection portion 1322 of the wiring harness isolation plate 121 and the mounting portion 132 more convenient. The connection portion 1322 can also serve to isolate the explosion-proof valves 104 of two adjacent battery cells 111. Figure 4 The harness isolation plate 121 has six connecting portions 1322 for each of the three mounting portions 132, forming six hollow areas 1212. Each connecting portion 1322 abuts against two opposing longer edges of the hollow area 1212 of the harness isolation plate 121. When two adjacent vias 1211 are connected, the connecting portion 1322 stands between the explosion-proof valves 104 of two adjacent battery cells 111, providing isolation.

[0065] In some embodiments, an extension portion 1323 may be protruded from at least one side of the main body 1321 . The extension direction of the extension portion 1323 is parallel to the first direction, and the extension portion 1323 abuts against the top surface 101 of the battery cell 111 .

[0066] The extension portion 1323 can be formed on one side of the main body 1321 near one battery cell 111 or on both sides near different battery cells 111, with the extension portion 1323 and the main body 1321 arranged perpendicularly. When the main body 1321 is inserted between two adjacent battery cells 111 and contacts the side surfaces of the battery cells 111 in the thickness direction, the extension portion 1323 can contact the top surface 101 of the battery cell 111. This increases the mating area between the mounting portion 132 and the battery cell 111, improving the stability of the connection between the mounting portion 132 and the battery cell 111.

[0067] like Figure 6 and Figure 7As shown, the mounting portion 132 may further include a first portion 1324 and a second portion 1325, which are relatively arranged at both ends of the main body 1321, and the first portion 1324 and the second portion 1325 are both in contact with at least one of the two battery cells 111 adjacent to each other in the first direction.

[0068] First portion 1324 and second portion 1325 are formed at the two ends of main body 1321. These portions restrict the mating position of mounting portion 132 on battery cell 111. These portions contact exposed surface 105 along the width of battery cell 111, thereby restricting the free movement of mounting portion 132 along the width of battery cell 111. This ensures a stable connection between mounting portion 132 and battery cell 111.

[0069] When the main body 1321 of the mounting portion 132 is inserted between two adjacent battery cells 111 and abuts the larger side surface of the battery cell 111, the extension 1323, which is arranged perpendicular to the main body 1321, abuts the top surface 101 of the battery cell 111. The first portion 1324 and the second portion 1325, which are arranged at opposite ends of the main body 1321, abut the smaller side surface of the battery cell 111. This allows the mounting portion 132 to form contact with the battery cell 111 in three different directions, ensuring a tight connection between the mounting portion 132 and the battery cell 111.

[0070] In some embodiments, a buckle 1326 is provided at one end of the connection portion 1322 away from the main body portion 1321 , and the isolation portion 131 is provided with a mounting hole 1311 . The buckle 1326 passes through the mounting hole 1311 and abuts against the side of the isolation portion 131 away from the multiple battery cells 111 .

[0071] The buckle 1326 has a variable cross-sectional shape and can form an abutment with the isolation part 131 by cooperating with the mounting hole 1311. The isolation part 131 is thereby firmly assembled on the top of the plurality of battery cells 111. The connecting part 1322 as a whole can be in the form of a base, or be configured in the shape of a flat plate, with a platform structure or a platform-like structure formed on the side away from the main body 1321. After the main body 1321 and the battery cell 111 are matched, the connecting part 1322 is exposed in the top area of ​​the battery cell 111. The isolation part 131 can be directly snapped into the buckle 1326 on the connecting part 1322, and then form an abutment with the platform structure on the connecting part 1322. At the same time, the buckle 1326 limits the side of the isolation part 131 away from the battery cell 111, firmly fixing the isolation part 131 in the top area of ​​the battery cell 111. In actual situations, the buckle 1326 can be passed through the mounting hole 1311 through a slight plastic deformation during fastening, or through elastic deformation.

[0072] On the basis of connecting the mounting portion 132 and the isolation portion 131 through a snap-fit ​​structure, a steel belt, i.e., a binding member 114, can be added to the periphery of the battery device. The steel belt is made to surround the arrangement direction of the multiple battery cells 111 to bind the battery cells 111 and the isolation structure 13. This enhances the matching stability between the isolation structure 13 and the battery cells 111. In addition, on the basis of arranging the isolation portion 131 in the top area of ​​the multiple battery cells 111, the isolation portion 131 can also be set in the bottom area and both side areas of the multiple battery cells 111. That is, four isolation portions 131 can be arranged to surround the arrangement direction of the multiple battery cells 111, and different isolation portions 131 can be snap-connected or fixedly connected. This plays an isolation role in different directions of the multiple battery cells 111.

[0073] In addition, the connection portion 1322 may be provided with a channel 1327 , and the channel 1327 is provided to penetrate along the first direction.

[0074] Channel 1327 can form a path for gas to pass through. Channel 1327 can connect the two sides of the connecting portion 1322 close to different battery cells 111, thereby guiding gas through and forming a pressure relief channel 1327. In actual situations, a through-hole structure can also be provided in the connecting portion 1322 to connect to the side of the isolation portion 131 away from the battery cells 111, so as to guide the discharged gas to the side of the isolation structure 13 away from the battery cells 111. Alternatively, the area formed by channel 1327 can extend beyond the plane of the isolation portion 131 to the side of the isolation portion 131 away from the multiple battery cells 111.

[0075] It should be noted that, in order to effectively prevent the mutual influence between two adjacent battery cells 111, the channel 1327 may not be provided on the connecting portion 1322. Thus, a retaining wall structure is formed between two adjacent battery cells 111 through the connecting portion 1322, effectively isolating the space on both sides.

[0076] In some embodiments, there are multiple connecting portions 1322 , and the multiple connecting portions 1322 are arranged on the main body 1321 at intervals.

[0077] By forming a plurality of connection portions 1322 on the main body 1321 , the mounting portion 132 and the isolation portion 131 can be matched from a plurality of different positions, thereby ensuring stability when the isolation portion 131 and the mounting portion 132 are connected.

[0078] like Figure 8 and Figure 9 As shown, two connecting parts 1322 can be provided on the same main body 1321, and the two connecting parts 1322 can connect the isolation part 131 from their respective corresponding positions. This improves the connection tightness between the isolation part 131 and the mounting part 132. Each connecting part 1322 of the mounting part 132 can be designed with a buckle 1326, and a mounting hole 1311 can be provided on the isolation part 131 corresponding to the heat insulation sheet, and the isolation part 131 can be clamped and limited by the buckle 1326. The structure of the buckle 1326 can be set in an umbrella shape. The head shape of the buckle 1326 can be Figure 8 and Figure 9 The straight type shown, Figure 10 and Figure 11 The circle shown or Figure 12 and Figure 13 The doji shape shown.

[0079] like Figure 7 As shown, the battery device may further include a cell thermal insulation pad 115 . The cell thermal insulation pad 115 is located between two adjacent battery cells 111 in the first direction, and at least a portion of the cell thermal insulation pad 115 is spaced from the top surface 101 of the battery cell 111 .

[0080] The cell thermal insulation pads 115 are placed on the sides of the cell 111 in the thickness direction, i.e., on the sides with larger areas, to block heat transfer on one or both sides of the cell 111. Furthermore, a gap is left between the cell thermal insulation pads 115 and the top surfaces 101 of the cell 111, allowing the main body 1321 of the mounting portion 132 to be inserted between two adjacent cells 111, thereby achieving connection between the mounting portion 132 and the cells 111.

[0081] In actual situations, if Figure 14As shown, the maximum distance M between the edge of at least part of the battery cell thermal insulation pad 115 and the top surface 101 of the battery cell 111 can be 5 mm to 7 mm.

[0082] That is to say, the edge of the battery cell thermal insulation pad 115 has a certain length from the top surface 101 of the battery cell 111, and the length can be controlled within the range of 5 mm to 7 mm. For example, the maximum distance M between the edge of the battery cell thermal insulation pad 115 corresponding to the mounting portion 132 and the top surface 101 of the battery cell 111 can be 5 mm, 5.5 mm, 6 mm, 6.5 mm or 7 mm. In actual circumstances, the battery cell thermal insulation pad 115 can only reduce the material in some areas to control the distance between it and the top surface 101 of the battery cell 111. For example, an inwardly recessed groove 1151 can be provided at the edge of the battery cell thermal insulation pad 115, such as Figure 15 and Figure 16 As shown, the number of the grooves 1151 can be one or more. The battery cell thermal insulation pad 115 can also be reduced in the entire width direction of the battery cell 111, that is, the top of the battery cell thermal insulation pad 115 is completely removed.

[0083] In addition, the distance between the main body 1321 and the battery cell thermal insulation pad 115 is 0.2 mm to 1 mm.

[0084] By controlling the distance between the main body 1321 and the battery cell thermal insulation pad 115 to form a certain distance, interference between the main body 1321 and the battery cell thermal insulation pad 115 can be avoided. In actual situations, the distance between the main body 1321 and the battery cell thermal insulation pad 115 can be 0.2 mm, 0.3 mm, 0.4 mm, 0.5 mm, 0.6 mm, 0.7 mm, 0.8 mm, 0.9 mm, or 1 mm.

[0085] In some embodiments, there may be a plurality of mounting portions 132 , and the plurality of mounting portions 132 are spaced apart from each other in the first direction.

[0086] Multiple mounting portions 132 are sequentially arranged along the arrangement direction of the multiple battery cells 111. Each mounting portion 132 can form a connection relationship with some of the battery cells 111, providing a basis for the connection between the isolation portion 131 and the battery cells 111. In actual situations, the number of mounting portions 132 can be two, three, four, or more. By increasing the number of mounting portions 132, the connection stability between the isolation portion 131 and the battery cells 111 can be ensured, so that the isolation portion 131 can better play an isolation role.

[0087] In addition, the isolation part 131 can also be set to multiple, and the multiple isolation parts 131 are arranged along the same arrangement direction as the multiple battery cells 111. The multiple isolation parts 131 are arranged in a one-to-one correspondence with the multiple installation parts 132. Each isolation part 131 can be matched with the corresponding installation part 132. For example, when there are three installation parts 132, the isolation parts 131 can also be set to three. The multiple isolation parts 131 are spliced ​​with each other in the top area of ​​the multiple battery cells 111 to form a complete isolation plate structure. In addition, the two adjacent isolation parts 131 can be snapped together at the splicing position, or form an upper and lower stacked structure. In order to enhance the tightness of the connection between the multiple isolation parts 131, and thereby ensure the stability of the overall isolation structure 13.

[0088] The mounting portion 132, forming the mounting structure, is connected to the thermal insulation sheet forming the isolation portion 131. This can be an integrally formed structure, such as injection molding, or a separate, connected structure. The mounting portion 132 fits into the assembly gap and engages with the battery cell 111. It also engages with the isolation portion 131 through an opening in the wiring harness isolation plate 121 of the CCS assembly 12.

[0089] The mounting portion 132 can be provided separately, and the mounting portion 132 can be provided as an injection molded part, and the mounting portion 132 is installed at the assembly gap between two adjacent battery cells 111. In the battery cell assembly 11, the battery cell thermal insulation pad 115 between two adjacent battery cells 111 can be used to form an assembly gap. By utilizing the assembly gap reserved by the battery cell 111, it is possible to facilitate the installation of the mounting portion 132 corresponding to the isolation structure 13, thereby realizing the installation of the isolation structure 13, and can be installed without nails, saving the drilling operation of the installation nails. When the assembly gap is formed between two adjacent battery cells 111, the corresponding mounting structure can be fixed by the clamping force between the battery cells 111, so that the reliability of the thermal insulation sheet is effectively improved.

[0090] By providing an injection-molded mounting structure within the assembly gap, the rigidity can be improved, thereby ensuring the reliability of the fixation of the thermal insulation sheet. By forming the required assembly gap in conjunction with the battery cell thermal insulation pad 115, the overall space can be made more compact. When the opening on the CCS assembly 12 exposes two explosion-proof valves 104, the mounting structure for installing the thermal insulation sheet can be used to block the two explosion-proof valves 104. When the connection portion 1322 of the mounting portion 132 is unevenly arranged, it can also play a positioning role when the isolation portion 131 is installed, making it difficult to install the isolation portion 131 incorrectly. The positive and negative pole markings on the isolation portion 131 can strictly correspond to the positive and negative pole lead-out structure of the battery device, making installation and positioning more convenient.

[0091] Some embodiments of the present application further provide an energy storage system, comprising a housing and the aforementioned battery device. The housing is provided with a receiving cavity, and the battery device is disposed within the receiving cavity.

[0092] Energy storage systems can utilize cabin-level, cluster-level, or pack-level energy storage, depending on the application scenario. Cells 111, or individual batteries, can be connected in series or parallel to form modules. An energy storage system can utilize one or more battery devices, and a certain number of battery devices can be centrally managed and controlled. Multiple battery devices can be packaged in a box of a certain volume to form a battery pack, or they can be packaged in a larger container to form a containerized energy storage system. Multiple battery devices can be jointly managed and controlled using a battery management system and a thermal management system.

[0093] By designing the isolation structure 13 in the battery device, the assembly of the isolation structure 13 can be simplified and the connection stability of the isolation structure 13 after assembly can be improved. At the same time, it can also avoid affecting the CCS assembly 12 in the battery device, thereby ensuring the operating performance of the battery device.

[0094] Some embodiments of the present application further provide an electrical device, which includes the above-mentioned battery storage device.

[0095] The electrical equipment may be daily consumer goods, industrial products, or other equipment equipped with a battery device in the form of electrochemical energy storage as an energy supply source.

[0096] Those skilled in the art will appreciate that the above-mentioned embodiments are specific examples for implementing the present application, and that in actual applications, various changes may be made thereto in form and detail without departing from the spirit and scope of the present application.

Claims

1. A battery device, characterized in that: include: A battery cell assembly comprising a plurality of battery cells arranged sequentially along a first direction, a first positioning member and a second positioning member sandwiching the plurality of battery cells therebetween, and a binding member binding the plurality of battery cells, the first positioning member, and the second positioning member together, each of the battery cells comprising a top surface and a bottom surface arranged opposite to each other along a second direction, the top surface of the battery cell having a pole and an explosion-proof valve, the second direction being perpendicular to the first direction; A CCS assembly is provided on the top surface of the plurality of battery cells, the CCS assembly is electrically connected to the pole of each battery cell, and exposes the explosion-proof valve of each battery cell; an isolation structure comprising an isolation portion covering the top surfaces of the plurality of battery cells, and a mounting portion connected to the battery cells, the isolation portion being supported on the top surfaces of the plurality of battery cells via the mounting portion and forming a gap with the top surfaces of the plurality of battery cells for accommodating the CCS assembly; The mounting portion includes a main body portion and a connecting portion connected to each other, wherein at least a portion of the main body portion is inserted between two adjacent battery cells; The CCS assembly includes a wiring harness isolation plate covering the top surface of multiple battery cells. The wiring harness isolation plate is provided with a through hole for avoiding the explosion-proof valve. The main body is located on the side of the wiring harness isolation plate close to the battery cells. The connecting portion passes through the wiring harness isolation plate and is engaged with the isolation portion. The connecting portion and the explosion-proof valves of two adjacent battery cells are located in a straight line, the vias on both sides of the connecting portion on the harness isolation plate are connected together, and the connecting portion is isolated between the explosion-proof valves of the two adjacent battery cells.

2. The battery device according to claim 1, wherein: An extension portion is protruding from at least one side of the main body portion, an extension direction of the extension portion is parallel to the first direction, and the extension portion abuts against the top surface of the battery core.

3. The battery device according to claim 2, characterized in that The mounting portion further includes a first portion and a second portion. The first portion and the second portion are arranged opposite to each other at two ends of the main body. Both the first portion and the second portion abut against at least one of the two adjacent battery cells.

4. The battery device according to claim 1, wherein: A buckle is provided at one end of the connecting portion away from the main body portion, and a mounting hole is provided at the isolation portion. The buckle passes through the mounting hole and abuts against a side of the isolation portion away from the plurality of battery cells.

5. The battery device according to claim 1, wherein: The connecting portion is provided with a channel, and the channel is penetrated along the first direction.

6. The battery device according to claim 1, wherein: There are a plurality of connecting parts, and the plurality of connecting parts are arranged on the main body at intervals.

7. The battery device according to claim 1, wherein: It also includes a battery cell thermal insulation pad, which is located between two adjacent battery cells, and there is a gap between at least part of the battery cell thermal insulation pad and the top surface of the battery cell.

8. The battery device according to claim 7, characterized in that The maximum distance between the edge of at least part of the battery cell thermal insulation pad and the top surface of the battery cell is 5 mm to 7 mm.

9. The battery device according to claim 8, characterized in that The distance between the main body and the battery core thermal insulation pad is 0.2 mm to 1 mm.

10. The battery device according to claim 1, wherein: There are a plurality of the mounting portions, and the plurality of the mounting portions are spaced apart from each other in the first direction.

11. An energy storage system, characterized in that: include: The box body is provided with a receiving cavity; The battery device according to any one of claims 1 to 10, wherein the battery device is arranged in the accommodating cavity.

12. An electrical device, characterized in that: A battery device comprising any one of claims 1 to 10.

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