Battery device, energy storage system and electric equipment

Abstract

The invention relates to the technical field of energy storage, and discloses a battery device, an energy storage system and electric equipment. The battery device comprises a battery cell assembly, a CCS assembly and an isolation structure. The battery cell assembly comprises a plurality of battery cells, a first positioning piece, a second positioning piece and a binding piece, wherein the plurality of battery cells are sequentially arranged along a first direction; the first positioning piece and the second positioning piece are used for clamping the plurality of battery cells in the middle; the binding piece is used for binding the plurality of battery cells, the first positioning piece and the second positioning piece together; each battery cell comprises a top surface and a bottom surface which are oppositely arranged along a second direction, the top surface of each battery cell is provided with a pole and an anti-explosion 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 with the pole of each battery cell, and the anti-explosion valve of each battery cell is exposed. The isolation structure comprises an isolation part covering the top surfaces of the plurality of battery cells and a mounting part connected with the battery cells. According to the battery device, the energy storage system and the electric equipment provided by the invention, the working performance of the battery device can be ensured.

Description

Technical Field

[0001] This application relates to the technical field of energy storage, and particularly 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 being applied more and more widely. An energy storage system uses a battery device formed by single cells to store electrical energy and output it when needed externally. Single cells have charge-discharge cycle characteristics and can switch between a charged state and a discharged state. As an important part of the energy storage system, the working performance of the battery device affects the performance of the energy storage system.

[0003] In addition to single cells, the battery device also includes other components that cooperate with the single cells. When assembling single cells to form a battery device, it is necessary to ensure the cooperation effect between the components to ensure the overall performance of the battery device. Therefore, how to design the structure of the battery device to ensure its working performance is an important issue. Summary of the Invention

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

[0005] To solve the above technical problems, an embodiment of this 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 that sandwich the plurality of battery cells in the middle, and a binding member that binds 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 that are oppositely arranged along a second direction, and the top surface of the battery cell has a pole column and an explosion-proof valve, and the second direction is perpendicular to the first direction. The CCS assembly is disposed on the top surfaces of the plurality of battery cells, the CCS assembly is electrically connected to the pole column of each battery cell, and the explosion-proof valve of each battery cell is exposed. The isolation structure includes 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 is supported on the top surfaces of the plurality of battery cells via the mounting portion and forms a space for accommodating the CCS assembly with the top surfaces of the plurality of battery cells.

[0006] An embodiment of this application also provides an energy storage system. The energy storage system includes a box body and the above-mentioned battery device. The box body is provided with a receiving cavity. The battery device is disposed in the receiving cavity.

[0007] An embodiment of this application also 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 a CCS component and an isolation structure on the top surfaces of a plurality of battery cells in a battery cell assembly. The isolation structure includes a connected isolation portion and an installation portion. The isolation portion covers the top surfaces of the plurality of battery cells to play an isolation role, and the installation portion is connected to the battery cells. At the same time, the isolation portion is supported by the installation portion. The stability of the isolation portion can be ensured through the connection between the installation portion and the battery cells. Furthermore, by utilizing the connection relationship formed between the isolation structure and the battery cells, the isolation structure can be assembled on the battery cell assembly bypassing the CCS component, and the reliability of the isolation structure can be improved by using the structural stability of the battery cells. At the same time, it can avoid having an adverse impact on the CCS component. Thereby ensuring the safety during the use of the battery device and improving the performance of the battery device.

[0009] In some embodiments, the installation portion includes a connected main body portion and a connection portion. At least part of the main body portion is inserted between two adjacent battery cells, and the connection portion is integrally formed with the isolation portion or is snap-connected to the isolation portion. In this way, the connection between the installation portion and the battery cells can be achieved through the main body portion, and the connection between the installation portion and the isolation portion can be achieved through the connection portion.

[0010] In some embodiments, the CCS component includes a wire harness isolation plate covering the top surfaces of the plurality of battery cells. The wire harness isolation plate is provided with a through hole for avoiding the explosion-proof valve. The main body portion is located on the side of the wire harness isolation plate close to the battery cells, and the connection portion passes through the wire harness isolation plate and is snap-connected to the isolation portion. In this way, by placing the main body portion on the side close to the battery cells, it is convenient to insert the main body portion between two adjacent battery cells, and the fixation of the installation portion is achieved through the clamping force between the two adjacent battery cells.

[0011] In some embodiments, the connection portion and the explosion-proof valves of two adjacent battery cells are on a straight line, and the through holes on the wire harness isolation plate on both sides of the connection portion are connected together, and the connection portion is isolated between the explosion-proof valves of two adjacent battery cells. In this way, the connection portion can play an isolation role between the explosion-proof valves of two adjacent battery cells to isolate the objects discharged by the explosion-proof valves.

[0012] In some embodiments, at least one side of the main body portion protrudes with an extension portion. The extension direction of the extension portion is parallel to the first direction, and the extension portion abuts against the top surface of the battery cell. In this way, contact can be formed between the extension portion and the top surface of the battery cell to increase the contact area between the installation portion and the battery cell and ensure the stability when the installation portion is connected to the battery cell.

[0013] In some embodiments, the installation part further includes a first part and a second part, which are oppositely arranged at two ends of the main body part, and both the first part and the second part are in contact with at least one of the two adjacent battery cells. In this way, the battery cells can be clamped by the first part and the second part at both ends of the main body part, restricting the connection position of the installation part.

[0014] In some embodiments, a buckle is provided at one end of the connecting part away from the main body part, and an installation hole is provided in the isolation part. The buckle passes through the installation hole and abuts against the side of the isolation part away from the multiple battery cells. In this way, through the cooperation between the buckle and the installation hole, it is convenient to install the isolation part on the installation part, and further form an integral body with the battery cells.

[0015] In some embodiments, a channel is provided in the connecting part, and the channel runs through in the first direction. In this way, a path for guiding the flow of the discharge can be formed through the channel on the connecting part, improving the stability during the use of the battery cells.

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

[0017] In some embodiments, the battery device further includes a battery cell heat insulation pad, which is located between two adjacent battery cells, and there is a gap between at least part of the battery cell heat insulation pad and the top surface of the battery cell. In this way, through the coordinated cooperation of the battery cell heat insulation pads, a reserved gap can be formed between two adjacent battery cells for the assembly of the main body part.

[0018] In some embodiments, the maximum distance between the edge of at least part of the battery cell heat insulation pad and the top surface of the battery cell is 5 millimeters to 7 millimeters. In this way, by controlling the maximum distance between the edge of the battery cell heat insulation pad and the top surface of the battery cell to be 5 millimeters to 7 millimeters, it is ensured that there is sufficient contact area between the installation part and the battery cell, and sufficient clamping force is formed by the battery cell on the installation part.

[0019] In some embodiments, the distance between the main body part and the battery cell heat insulation pad is 0.2 millimeters to 1 millimeter. In this way, by controlling the distance between the main body part and the battery cell heat insulation pad, interference between the main body part and the battery cell heat 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 installation parts, and the multiple installation parts are arranged at intervals in the first direction. In this way, by providing multiple installation parts, the stability of the connection structure formed between the isolation part and the battery cell can be ensured. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] One or more embodiments are exemplarily illustrated by the pictures in the corresponding drawings. These exemplary illustrations do not constitute a limitation on the embodiments. Elements with the same reference numerals in the drawings are represented as similar elements, unless otherwise stated, and the drawings in the figures do not constitute a scale limitation.

[0022] Figure 1 is a schematic perspective view of a battery device provided by some embodiments of the present application; Figure 2 is Figure 1 an enlarged schematic view of part A in Figure 3 is a schematic view of the structure of the battery device provided by some embodiments of the present application when the isolation part is not installed; Figure 4 is a schematic view of the wire harness isolation plate of the CCS component in the battery device provided by some embodiments of the present application; Figure 5 is a schematic view of the battery cell of the battery cell component in the battery device provided by some embodiments of the present application; Figure 6 is a schematic view of the mating structure of the installation part of the battery cell and the isolation structure in the battery device provided by some embodiments of the present application; Figure 7 is a schematic view of the mating structure of the installation part of the battery cell heat insulation pad and the isolation structure in the battery device provided by some embodiments of the present application; Figure 8 is a schematic view of the installation part of the isolation structure in the battery device provided by some embodiments of the present application; Figure 9 is Figure 8 an enlarged schematic view of part B in Figure 10 is a schematic view of the installation part of the isolation structure in the battery device provided by some other embodiments of the present application; Figure 11 is Figure 10 an enlarged schematic view of part C in Figure 12 is a schematic view of the installation part of the isolation structure in the battery device provided by some other embodiments of the present application; Figure 13 is Figure 12 an enlarged schematic view of part D in Figure 14 is a schematic view of the interval of the top surface of the battery cell of the battery cell heat insulation pad in the battery device provided by some embodiments of the present application; Figure 15 is a schematic view of the battery cell heat insulation pad in the battery device provided by some other embodiments of the present application; Figure 16 It is a schematic structural diagram of a battery cell heat insulation pad in a battery device provided by some other embodiments of the present application. Detailed implementation manners

[0023] To make the objectives, technical solutions and advantages of the embodiments of the present application clearer, the following will elaborate on various embodiments of the present application with reference to the accompanying drawings. However, those of ordinary skill in the art can understand that in various embodiments of the present application, many technical details are provided to help readers 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 still be implemented. The division of the following embodiments is for convenience of description and should not constitute any limitation on the specific implementation manners of the present application. Various embodiments can be combined and cross-referenced with each other on the premise of no contradiction.

[0024] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those of ordinary skill in the technical field to which this application belongs; the terms used herein are only for the purpose of describing specific embodiments 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 accompanying drawing descriptions are intended to cover non-exclusive inclusion.

[0025] In the description of the embodiments of the present application, unless otherwise clearly specified and limited, technical terms such as "installation", "connection", and "coupling" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral body; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the internal communication of two components or the interaction relationship between two components. For those of ordinary skill in the art, the specific meanings of the above terms in the embodiments of the present application can be understood according to specific circumstances.

[0026] As the importance of energy storage increases day by day, the performance of energy storage systems has also received more and more attention. Energy storage systems use battery cells, or single cells, to assemble into modules, and then the modules are encapsulated to form an electrochemical energy storage system. Multiple battery cells can be assembled in series or in parallel, and the formed battery device uses a certain packaging form to assemble multiple battery cells. One or more battery devices can be used in an energy storage system, and a certain number of battery devices can form a battery cluster for unified management and control. Multiple battery devices can be encapsulated in a box of a certain volume to form a battery pack, or encapsulated in a container with a larger volume to form a container energy storage system. Multiple battery devices can be jointly managed and controlled through a battery management system and a thermal management system.

[0027] When assembling multiple battery cells, an isolation structure is usually designed to play a protective role. For example, in a battery pack, the heat insulation sheet located above the CCS (Cell Connection System) component is an isolation component with an important function. The heat insulation sheet is generally made of mica material, and a thinning part or a semi-hollowed part is provided on the heat insulation sheet corresponding to the explosion-proof hole on the top surface of the battery cell. When the high-temperature electrolyte inside the battery cell experiencing thermal runaway sprays out, the electrolyte can spray out through the thinning part or the semi-hollowed part of the heat insulation sheet. The heat insulation sheet can be used to isolate the sprayed electrolyte and prevent the spread of thermal runaway from affecting other battery cells.

[0028] The design of the isolation component affects the use performance and safety of the battery device. In the prior art, the heat insulation sheet on the top of the battery cell is covered above the CCS component, and a fastening hole is provided on the heat insulation sheet. The fastening nail fixes the heat insulation sheet above the CCS component by means of the fastening hole. However, when using the fastening nail to fix the heat insulation sheet, a certain pressure and external force need to be applied to make the fastening nail penetrate the isolation plate (i.e., the heat insulation sheet) and fix it in the corresponding position. If the operation is improper, the applied force is too large or the position of the fastening nail is inaccurate, it is very easy to cause mechanical damage such as extrusion and scratching to the underlying CCS component, affecting the performance and service life of the CCS component. Moreover, the battery pack may experience various vibration environments during actual application. Under this vibration effect, the fastening nail may gradually become loose, resulting in a poor fixing effect of the heat insulation sheet. Eventually, the heat insulation sheet cannot effectively play the isolation role, and may even cause the isolation plate to fall off, posing a threat to the safety of the CCS component and the entire battery pack. At the same time, using the fastening nail for fixing requires individual operations, and it is necessary to ensure that each fastening nail is installed in place and fixed firmly, which requires a certain operation space and skills. Compared with some other simple fixing methods, the installation process is more cumbersome, which will reduce the assembly efficiency of the battery pack.

[0029] In order to improve the safety during the use of the battery device and ensure the use 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 the installation part that cooperates with the battery cell. When installing the isolation structure, the isolation part of the isolation structure can be supported above the CCS component through the installation part. Thereby, the installation form of the isolation structure can be simplified, and the adverse impact on the CCS component during the installation of the isolation structure can be avoided. At the same time, by matching the isolation structure with the battery cell, the stability during the installation of the isolation structure can be improved.

[0030] The following combines Figures 1 to 16 to illustrate the structure of the battery device provided by some embodiments of the present application.

[0031] As Figures 1 to 16As shown in the figure, the battery device provided by some embodiments of the present application includes a battery cell assembly 11, a CCS assembly 12, and an isolation structure 13. The battery cell assembly 11 includes a plurality of battery cells 111 arranged in sequence along a first direction ( Figure 1 the direction indicated by the arrow X in Figure 1 ), a first positioning member 112 and a second positioning member 113 that sandwich the plurality of battery cells 111 in the middle, and a binding member 114 that binds the plurality of battery cells 111, the first positioning member 112, and the second positioning member 113 together. Each battery cell 111 includes a top surface 101 and a bottom surface 102 that are oppositely arranged along a second direction ( Figure 1 the direction indicated by the arrow Y in Figure 1 ). The top surface 101 of the battery cell 111 has a terminal 103 and an explosion-proof valve 104. The second direction is perpendicular to the first direction. The CCS assembly 12 is disposed on the top surfaces 101 of the plurality of battery cells 111. The CCS assembly 12 is electrically connected to the terminal 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 surfaces 101 of the plurality of battery cells 111 and a mounting portion 132 connected to the battery cells 111. The isolation portion 131 is supported on the top surfaces 101 of the plurality of battery cells 111 via the mounting portion 132 and forms a space for accommodating the CCS assembly 12 with the top surfaces 101 of the plurality of battery cells 111.

[0032] The battery cell assembly 11 is a key part that plays a role in energy storage in the battery device. The battery cell assembly 11 is formed by assembling a plurality of battery cells 111. The plurality of 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 1 As shown in the figure, two rows of battery cells 111 are arranged in the battery device. The battery cells 111 can adopt square shell secondary batteries to effectively utilize the space and increase the capacity of the battery device. A heat insulation pad can be provided between two adjacent battery cells 111 arranged along the same direction to block the heat transfer process in the thickness direction of the battery cells 111 and prevent the thermal runaway phenomenon occurring in some battery cells 111 from spreading to adjacent other battery cells 111. A heat insulation pad can also be provided between two adjacent rows of battery cells 111 to block the heat transfer process in the width direction of the battery cells 111.

[0033] The first positioning member 112 and the second positioning member 113 are parts that limit the plurality of battery cells 111. The first positioning member 112 and the second positioning member 113 can adopt the form of end plates. Different positioning members cooperate with the binding member 114 to fix the plurality of battery cells 111. The binding member 114 surrounds the plurality of battery cells 111 for one week and binds the plurality of battery cells 111 and different positioning members together to form a whole. The binding member 114 can adopt a binding band, a cable tie, or a packing band, and the number of binding members 114 can be set to multiple. In actual situations, the binding member 114 can adopt a steel band with a relatively high strength.

[0034] The top surface 101 and the bottom surface 102 of the battery cell 111 are 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 terminal post 103 structure and an explosion-proof valve 104 structure. The positive and negative terminal post 103 structures respectively correspond to the positive and negative electrodes of the battery cell 111, and the battery cell 111 can be connected to the energy storage system in the form of connecting cables or connecting pieces, etc. The explosion-proof valve 104 structure corresponds to the pressure relief part of the battery cell 111, and can form a pressure relief channel under special circumstances to prevent potential safety hazards during the use of the battery cell 111.

[0035] The CCS assembly 12 can achieve the series or parallel connection of multiple battery cells 111 for current transmission. It can also achieve the acquisition of working data. For example, the CCS assembly 12 can use a thermistor to collect the temperature of the battery cell 111, and can also collect data such as the voltage of the battery cell 111, so as to facilitate the monitoring of the state of the battery cell 111. The acquisition assembly can use an aluminum bar to connect to the terminal post 103 on the top surface 101 of the battery cell 111, and the aluminum bar can be welded to the terminal post 103 of the battery cell 111 to collect the working data of each battery cell 111. The acquisition assembly also transmits the acquisition data of each battery cell 111 outward through a circuit formed by a cable, and can set a connection interface to connect different battery devices to the overall circuit.

[0036] The isolation structure 13 is arranged on the periphery of multiple battery cells 111 and plays a protective role for the multiple battery cells 111. The isolation structure 13 can insulate heat on the outside of the battery cell assembly 11. At the same time, the isolation structure 13 can be provided with a pressure relief structure at a position corresponding to the explosion-proof valve 104 on the top surface 101 of the battery cell 111, so that after thermal runaway occurs in some battery cells 111, high-pressure gas or liquid can be discharged through the pressure relief structure. Thus, it is avoided from affecting other battery cells 111.

[0037] The isolation structure 13 includes an isolation part 131 and a mounting part 132. The isolation part 131 covers the top surface 101 of multiple battery cells 111 to play an isolation role. The projection of the isolation part 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 part 132 can form a connection relationship with at least some of the battery cells 111 in the battery cell assembly 11 by means of bonding, clamping or wrapping, etc., and can support the isolation part 131 within a certain area on the top of the multiple battery cells 111. At the same time, a gap is formed between the isolation part 131 and the top surface 101 of the battery cell 111 to avoid the assembly area of the CCS assembly 12.

[0038] In an actual situation, the isolation part 131 and the installation part 132 can adopt an integrally formed structure or be connected in a split structure to form a whole. The isolation part 131 is formed by a heat insulation board, and the material can be mica sheet. When thermal runaway occurs in some of the battery cells 111, the high-temperature electrolyte inside the battery cell 111 will be released through the position of the explosion-proof valve 104, and the released electrolyte will break through the isolation part 131 and fall on the surface of the isolation part 131 on the side away from the battery cell 111. Therefore, the isolation part 131 can play an isolation role to reduce the phenomenon that the high-temperature electrolyte falls on other battery cells 111 and causes the thermal runaway to spread to other battery cells 111. The isolation part 131 can be provided with a thinning area or a pressure relief groove in a semi-hollowed-out form at the position corresponding to the explosion-proof valve 104 of the battery cell 111, so that the discharge can break through the isolation part 131.

[0039] For the battery device provided by some embodiments of the present application, the CCS components 12 and the isolation structure 13 are respectively arranged on the top surfaces 101 of multiple battery cells 111 in the battery cell assembly 11. The isolation structure 13 includes a connected isolation part 131 and an installation part 132. The isolation part 131 covers the top surfaces 101 of multiple battery cells 111 to play an isolation role, and the installation part 132 is connected to the battery cell 111. At the same time, the isolation part 131 is supported by the installation part 132. The connection between the installation part 132 and the battery cell 111 can ensure the stability of the isolation part 131. Furthermore, by using the connection relationship formed between the isolation structure 13 and the battery cell 111, the isolation structure 13 can be assembled on the battery cell assembly 11 bypassing the CCS component 12, and the reliability of the isolation structure 13 can be improved by using the structural stability of the battery cell 111. At the same time, it can avoid having an adverse impact on the CCS component 12. Thereby ensuring the safety during the use of the battery device and improving the performance of the battery device.

[0040] In some embodiments, the installation part 132 includes a connected main body part 1321 and a connecting part 1322. At least part of the main body part 1321 is inserted between two adjacent battery cells 111, and the connecting part 1322 is integrally formed with the isolation part 131 or is snap-connected to the isolation part 131.

[0041] That is to say, the reserved assembly gap between two adjacent battery cells 111 can be utilized, and the connection between the mounting portion 132 and the battery cell 111 can be realized by means of the assembly gap and the main body portion 1321 disposed in the assembly gap. The main body portion 1321 is the portion where the mounting portion 132 cooperates with the battery cell 111, and the connecting portion 1322 is the portion where the mounting portion 132 cooperates with the isolating portion 131. The main body portion 1321 can be partially or entirely inserted between two adjacent battery cells 111, and by the extrusion action of the two adjacent battery cells 111 on the main body portion 1321, the mounting portion 132 can be effectively fixed on the battery cell assembly 11.

[0042] The connecting portion 1322 is a protruding structure formed on the main body portion 1321. The connecting portion 1322 can be integrally provided with the isolating portion 131 or be snap-connected in a snap-fit form. When it is necessary to ensure the connection strength between the connecting portion 1322 and the isolating portion 131, the mounting portion 132 and the isolating portion 131 can be made in an integrally formed manner. In the case where the installation convenience of the isolation structure 13 is required to be improved, the isolating portion 131 can be assembled on the mounting portion 132 in a snap-fit form.

[0043] As Figure 2 and Figure 3 shown, the CCS assembly 12 can include a wire harness isolation board 121 covering the top surface 101 of a plurality of battery cells 111. The wire harness isolation board 121 is provided with a through hole 1211 for avoiding the explosion-proof valve 104. The main body portion 1321 is located on the side of the wire harness isolation board 121 close to the battery cell 111, and the connecting portion 1322 passes through the wire harness isolation board 121 and is snap-connected to the isolating portion 131.

[0044] The wire harness isolation board 121 can play an insulating role on the top surface 101 of a plurality of battery cells 111 and can provide a basis for the arrangement of the wire harness. The wire harness isolation board 121 is provided with a through hole 1211 corresponding to the position of the explosion-proof valve 104 of the battery cell 111 so as to form an avoidance space. The main body portion 1321 of the mounting portion 132 that cooperates with the battery cell 111 is located on the side of the wire harness isolation board 121 close to the battery cell 111, and the connecting portion 1322 passes through the wire harness isolation board 121 and is snap-connected to the isolating portion 131. By placing the main body portion 1321 on the side of the wire harness isolation board 121 close to the battery cell 111, it is convenient to realize the connection between the main body portion 1321 and the battery cell 111. At the same time, the wire harness isolation board 121 can also limit the main body portion 1321 so that the main body portion 1321 is effectively fixed on the side of the wire harness isolation board 121 close to a plurality of battery cells 111.

[0045] In actual situations, the snap connection can adopt various forms, such as the shaft-hole mating form, the mating form of a protrusion and a groove, or the mating form of a snap and a slot. The wire harness separator 121 can be connected and fixed to the positioning member on the outer side of the battery cell 111. At the same time, a tab 122 can be provided on the wire harness separator 121 to connect two adjacent battery cells 111, and a connecting cable or a connecting plate 123 can be provided to connect with the tabs 122 connecting the battery cells 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 tab 122 can be limited by the guide posts provided on the wire harness separator 121.

[0046] In some embodiments, guide posts can also be provided on the wire harness separator 121, and guide holes can be provided on the isolation part 131. The guide posts on the wire harness separator 121 can pass through the guide holes on the isolation part 131, so that when installing the isolation structure 13, the isolation part 131 can be guided through the cooperation between the guide posts and the guide holes. Moreover, a snap can be provided at the top of the guide post to apply a limiting effect on the isolation part 131 through the snap at the top of the guide post.

[0047] In addition, the connecting part 1322 of the installation part 132 can be aligned with the explosion-proof valves 104 of two adjacent battery cells 111. The through holes on both sides of the connecting part 1322 on the wire harness separator 121 are communicated with each other, and the connecting part 1322 is isolated between the explosion-proof valves 104 of two adjacent battery cells 111.

[0048] That is to say, the connecting part 1322 can also play an isolation role for the battery cell assembly 11. The connecting part 1322 can form a partition in the area on the wire harness separator 121 corresponding to the explosion-proof valves 104 of two adjacent battery cells 111. Thus, the mutual influence between two adjacent battery cells 111 can be blocked by means of the connecting part 1322.

[0049] As Figure 4 shown, the wire harness separator 121 is provided with corresponding through holes 1211 for the explosion-proof valve 104 areas of each battery cell 111. At the position of the installation part 132 corresponding to some battery cells 111, two adjacent through holes 1211 on the wire harness separator 121 are communicated with each other to form a relatively large runway-shaped hollow area 1212. The hollow area 1212 can avoid the connecting part 1322 of the installation part 132, making the cooperation between the wire harness separator 121 and the connecting part 1322 of the installation part 132 more convenient. And the connecting part 1322 can play an isolation role between the explosion-proof valves 104 of two adjacent battery cells 111. Figure 4The wire harness isolation board 121 therein corresponds to three mounting parts 132 with a total of six connecting parts 1322, forming six hollow areas 1212. Each connecting part 1322 abuts against two relatively long edges of the wire harness isolation board 121 opposite to the hollow area 1212. Thus, when two adjacent vias 1211 are connected together, it stands between the explosion-proof valves 104 of two adjacent battery cells 111 to play an isolation role.

[0050] In some embodiments, at least one side of the main body part 1321 may be convexly provided with an extension part 1323. The extending direction of the extension part 1323 is parallel to the first direction, and the extension part 1323 abuts against the top surface 101 of the battery cell 111.

[0051] The extension part 1323 may be formed on one side of the main body part 1321 close to one battery cell 111 or on both sides close to different battery cells 111. The extension part 1323 and the main body part 1321 are perpendicularly arranged. When the main body part 1321 is inserted between two adjacent battery cells 111 and contacts the side surface of the battery cell 111 in the thickness direction, the extension part 1323 may contact the top surface 101 of the battery cell 111. Thereby increasing the fitting area between the mounting part 132 and the battery cell 111 and improving the stability when the mounting part 132 is connected to the battery cell 111.

[0052] As Figure 6 and Figure 7 shown, the mounting part 132 may further include a first part 1324 and a second part 1325. The first part 1324 and the second part 1325 are oppositely arranged at both ends of the main body part 1321. Both the first part 1324 and the second part 1325 abut against at least one of two adjacent battery cells 111 in the first direction.

[0053] The first part 1324 and the second part 1325 are formed at two ends of the main body part 1321. The fitting position of the mounting part 132 on the battery cell 111 can be restricted by the first part 1324 and the second part 1325. The first part 1324 and the second part 1325 may contact the exposed surface 105 of the battery cell 111 in the width direction, thereby restricting the free movement of the mounting part 132 along the width direction of the battery cell 111. Ensure that the mounting part 132 is in a stable connection state.

[0054] When the main body portion 1321 of the installation portion 132 is inserted between two adjacent battery cells 111 and abuts against the side surface of the battery cell 111 with a larger area, the extension portion 1323 perpendicular to the main body portion 1321 abuts against the top surface 101 of the battery cell 111. The first portion 1324 and the second portion 1325 disposed at both ends of the main body portion 1321 abut against the side surfaces of the battery cell 111 with a smaller area. Thus, the installation portion 132 can form contacts with the surfaces of the battery cell 111 in three different directions, ensuring the connection tightness between the installation portion 132 and the battery cell 111.

[0055] In some embodiments, a buckle 1326 is provided at one end of the connecting 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 plurality of battery cells 111.

[0056] The buckle 1326 has a variable cross-sectional shape and can form an abutment against the isolation portion 131 by cooperating with the mounting hole 1311. Thus, the isolation portion 131 is stably assembled on the tops of the plurality of battery cells 111. The connecting portion 1322 as a whole can be in the form of a base or arranged in a flat plate shape, and a platform structure or a platform-like structure is formed on the side away from the main body portion 1321. After the cooperation between the main body portion 1321 and the battery cell 111 is completed, the connecting portion 1322 is exposed in the top region of the battery cell 111. The isolation portion 131 can be directly snapped into the buckle 1326 on the connecting portion 1322, and then abut against the platform structure on the connecting portion 1322. At the same time, the buckle 1326 limits the isolation portion 131 on the side away from the battery cell 111, firmly fixing the isolation portion 131 in the top region of the battery cell 111. In actual situations, the buckle 1326 can pass through the mounting hole 1311 through minor plastic deformation during buckling, or the buckle 1326 can pass through the mounting hole 1311 through elastic deformation.

[0057] On the basis of connecting the installation portion 132 and the isolation portion 131 through the buckling structure, a steel strip, that is, a binding member 114, can be added to the periphery of the battery device. The steel strip surrounds the arrangement direction of the plurality of battery cells 111 to bind the battery cells 111 and the isolation structure 13. Thus, the cooperation stability between the isolation structure 13 and the battery cells 111 is enhanced. Moreover, on the basis of arranging the isolation portion 131 in the top region of the plurality of battery cells 111, the isolation portion 131 can also be arranged in the bottom region and the two side regions of the plurality of battery cells 111. That is, four isolation portions 131 can be arranged to surround the arrangement direction of the plurality of battery cells 111, and the different isolation portions 131 can be snap-connected or fixedly connected. Thus, the isolation function is respectively achieved in different directions of the plurality of battery cells 111.

[0058] In addition, the connecting portion 1322 may be provided with a channel 1327, which is disposed through along the first direction.

[0059] The channel 1327 may form a path for gas to pass through. The channel 1327 may communicate with both sides of the connecting portion 1322 close to different battery cells 111, so as to guide the gas to pass through and form a pressure relief channel 1327. In an actual situation, a through-hole structure communicating with the side of the isolation portion 131 away from the battery cell 111 may also be provided in the connecting portion 1322, so as to guide the discharge to the side of the isolation structure 13 away from the battery cell 111. Alternatively, the formation area of the channel 1327 extends beyond the plane where the isolation portion 131 is located and extends to the side of the isolation portion 131 away from the plurality of battery cells 111.

[0060] It should be noted that, in order to effectively block 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 spaces on both sides.

[0061] In some embodiments, there are a plurality of connecting portions 1322, and the plurality of connecting portions 1322 are arranged at intervals on the main body portion 1321.

[0062] By forming a plurality of connecting portions 1322 on the main body portion 1321, the cooperation between the mounting portion 132 and the isolation portion 131 can be carried out from a plurality of different positions, thereby ensuring the stability when the isolation portion 131 is connected to the mounting portion 132.

[0063] Such as Figure 8 and Figure 9 As shown, two connecting portions 1322 may be provided on the same main body portion 1321, and the two connecting portions 1322 may play a connecting role on the isolation portion 131 from their respective corresponding positions. Thus, the connection tightness between the isolation portion 131 and the mounting portion 132 is improved. Each connecting portion 1322 of the mounting portion 132 may be designed with a buckle 1326, and a mounting hole 1311 may be correspondingly provided on the isolation portion 131 corresponding to the heat insulation sheet, and the isolation portion 131 is clamped and limited by the buckle 1326. The structure of the buckle 1326 may be arranged in an umbrella shape. The head shape of the buckle 1326 may be Figure 8 and Figure 9 the straight shape shown in Figure 10 and Figure 11 the circular shape shown in Figure 12 and Figure 13 the cross-star shape shown in

[0064] Such as Figure 7As shown, the battery device may further include a cell heat insulation pad 115. The cell heat insulation pad 115 is located between two adjacent cells 111 in the first direction, and there is a gap between at least a part of the cell heat insulation pad 115 and the top surface 101 of the cell 111.

[0065] The cell heat insulation pad 115 is filled on the side of the cell 111 in the thickness direction, that is, the side with a larger area, and can play a role in blocking heat transfer on one or both sides of the cell 111. At the same time, a gap is reserved between a part of the cell heat insulation pad 115 and the top surface 101 of the cell 111, which can allow the main body 1321 of the installation part 132 to be inserted between two adjacent cells 111 to realize the connection between the installation part 132 and the cell 111.

[0066] In actual situations, as Figure 14 shown, the maximum distance M between the edge of at least a part of the cell heat insulation pad 115 and the top surface 101 of the cell 111 can be 5 mm to 7 mm.

[0067] That is to say, there is a certain length between the edge of the cell heat insulation pad 115 and the top surface 101 of the cell 111, and this length can be controlled within the range of 5 mm to 7 mm. For example, the maximum distance M between the edge of the cell heat insulation pad 115 corresponding to the installation part 132 and the top surface 101 of the cell 111 can be 5 mm, 5.5 mm, 6 mm, 6.5 mm or 7 mm. In actual situations, the cell heat insulation pad 115 can control the distance from the top surface 101 of the cell 111 by cutting materials only in some areas. For example, a groove 1151 that is recessed inward can be provided at the edge of the cell heat insulation pad 115, as Figure 15 and Figure 16 shown, the number of the grooves 1151 can be one or more. It is also possible to cut the materials of the cell heat insulation pad 115 in the entire width direction of the cell 111, that is, completely remove the top of the cell heat insulation pad 115.

[0068] In addition, the distance between the main body 1321 and the cell heat insulation pad 115 is 0.2 mm to 1 mm.

[0069] By controlling a certain gap is formed between the main body 1321 and the cell heat insulation pad 115, interference between the main body 1321 and the cell heat insulation pad 115 can be avoided. In actual situations, the distance between the main body 1321 and the cell heat 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.

[0070] In some embodiments, there may be multiple installation parts 132, and the multiple installation parts 132 are arranged at intervals in the first direction.

[0071] A plurality of mounting portions 132 are sequentially arranged along the arrangement direction of the plurality of battery cells 111. Each mounting portion 132 can form a connection relationship with a partial battery cell 111, providing a basis for connecting the isolation portion 131 and the battery cell 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 cell 111 can be ensured, enabling the isolation portion 131 to better play the role of isolation.

[0072] In addition, the isolation portion 131 can also be set as a plurality, and the plurality of isolation portions 131 are arranged along the same arrangement direction as the plurality of battery cells 111. The plurality of isolation portions 131 and the plurality of mounting portions 132 are arranged in one-to-one correspondence. Each isolation portion 131 can cooperate with the corresponding mounting portion 132. For example, when there are three mounting portions 132, the isolation portion 131 can also be set as three. The plurality of isolation portions 131 are spliced with each other to form a complete isolation plate structure in the top region of the plurality of battery cells 111. Moreover, adjacent two isolation portions 131 can be engaged at the splicing position, or form an upper and lower stacked structure. So as to enhance the connection tightness between the plurality of isolation portions 131, and further ensure the use stability of the overall isolation structure 13.

[0073] The mounting portion 132 forming the mounting structure is connected to the heat insulation sheet forming the isolation portion 131, and can be an integrally formed structure, such as injection molding, or a split connection structure. The mounting portion 132 enters the assembly gap to cooperate with the battery cell 111, and cooperates with the isolation portion 131 through the opening on the wire harness isolation plate 121 of the CCS component 12.

[0074] The mounting portion 132 can be set separately. The mounting portion 132 is set 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 heat insulation pad 115 between two adjacent battery cells 111 can be used to form the assembly gap. By using the assembly gap reserved by the battery cell 111, it is convenient to install the corresponding mounting portion 132 of the isolation structure 13, so as to realize the installation of the isolation structure 13, which can avoid the installation of snap fasteners and save the drilling operation of installing snap fasteners. When forming the assembly gap by using two adjacent battery cells 111, the corresponding mounting structure can be fixed by using the clamping force between the battery cells 111, effectively improving the reliability of the heat insulation sheet.

[0075] By providing an injection-molded mounting structure within the assembly gap, rigidity can be enhanced, thereby ensuring the fixing reliability of the heat insulation sheet. By collaborating with the battery cell heat insulation pad 115 to form the required assembly gap, the overall space can be made more compact. When openings on the CCS assembly 12 expose the two explosion-proof valves 104, the mounting structure for installing the heat insulation sheet can be utilized to isolate the two explosion-proof valves 104. When the connecting portions 1322 of the mounting portion 132 are non-uniformly arranged, it can also play a positioning role during the installation of the isolation portion 131, making it difficult to misinstall the isolation portion 131. The positive and negative markings on the isolation portion 131 can strictly correspond to the positive and negative lead-out structures of the battery device, facilitating the installation and positioning.

[0076] Some embodiments of the present application further provide an energy storage system, which includes a box body and the above-mentioned battery device. The box body is provided with a receiving cavity. The battery device is arranged in the receiving cavity.

[0077] The energy storage system can adopt a cabin-level energy storage form, a cluster-level energy storage form, and a pack-level energy storage form according to different application scenarios. The battery cells 111, that is, single cells, can be connected in series or in parallel to form modules. One or more battery devices can be adopted in the energy storage system, and a certain number of battery devices can be uniformly managed and controlled. Multiple battery devices can be encapsulated in a box body with a certain volume to form a battery pack, or can be encapsulated in a relatively large container to form a container energy storage system. Multiple battery devices can be jointly managed and controlled through a battery management system and a thermal management system.

[0078] By designing the form of the isolation structure 13 in the battery device, the assembly of the isolation structure 13 can be simplified, and the connection stability after the assembly of the isolation structure 13 can be improved. At the same time, it can also avoid affecting the CCS assembly 12 in the battery device. Thereby ensuring the working performance of the battery device.

[0079] Some embodiments of the present application further provide an electrical equipment, which includes the above-mentioned battery device.

[0080] The electrical equipment can be daily consumer goods, industrial products, or other equipment equipped with a battery device adopting an electrochemical energy storage form as an energy supply source.

[0081] Those of ordinary skill in the art can understand that the above-described embodiments are specific embodiments for implementing the present application, and in actual applications, various changes can be made in form and details 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 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 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, and the second direction being perpendicular to the first direction; A CCS component is arranged on the top surface of the plurality of battery cells, the CCS component is electrically connected to the pole of each battery cell and exposes the explosion-proof valve of each battery cell; The isolation structure includes an isolation part covering the top surfaces of the multiple battery cells and a mounting part connected to the battery cells. The isolation part is supported on the top surfaces of the multiple battery cells via the mounting part and forms a gap with the top surfaces of the multiple battery cells to accommodate the CCS assembly.

2. The battery device according to claim 1, characterized in that: The mounting portion includes a main body portion and a connecting portion which are connected to each other. At least a portion of the main body portion is inserted between two adjacent battery cells. The connecting portion is integrally formed with the isolation portion, or the connecting portion is snap-connected with the isolation portion.

3. The battery device according to claim 2, characterized in that: The CCS assembly includes a wiring harness isolation plate covering the top surfaces of the plurality of battery cells, the wiring harness isolation plate being provided with a through hole for avoiding the explosion-proof valve, the main body being located on a side of the wiring harness isolation plate close to the battery cells, and the connecting portion passing through the wiring harness isolation plate and being engaged with the isolation portion.

4. The battery device according to claim 3, characterized in that: The connecting portion and the explosion-proof valves of two adjacent battery cells are located in a straight line, the vias on the harness isolation plate located on both sides of the connecting portion are connected together, and the connecting portion is isolated between the explosion-proof valves of two adjacent battery cells.

5. The battery device according to claim 2, characterized in that: An extension portion is protrudingly provided on 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.

6. The battery device according to claim 5, characterized in that: The mounting portion further includes a first portion and a second portion, wherein the first portion and the second portion are arranged opposite to each other at two ends of the main body, and the first portion and the second portion are both in contact with at least one of two adjacent battery cells.

7. The battery device according to claim 2, characterized in that: A buckle is provided at one end of the connection 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.

8. The battery device according to claim 2, characterized in that: The connecting portion is provided with a channel, and the channel is penetrated along the first direction.

9. The battery device according to claim 2, characterized in that: There are a plurality of connecting parts, and the plurality of connecting parts are arranged on the main body at intervals.

10. The battery device according to claim 2, characterized in that: 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.

11. The battery device according to claim 10, 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.

12. The battery device according to claim 11, characterized in that: The distance between the main body and the battery cell thermal insulation pad is 0.2 mm to 1 mm.

13. The battery device according to claim 1, characterized in that: 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.

14. An energy storage system, characterized in that: include: The box body is provided with a containing cavity; The battery device according to any one of claims 1 to 13, wherein the battery device is arranged in the accommodating cavity.

15. An electrical equipment, characterized in that: A battery device comprising any one of claims 1 to 13.

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