Battery device, energy storage device, energy storage system, and charging network

Abstract

The application discloses a battery device, an energy storage device, an energy storage system and a charging network. The battery device comprises a battery cell assembly, the battery cell assembly comprising a plurality of battery cells arranged along a first direction, a first wall of each battery cell being provided with an electrode terminal; a first end plate and a second end plate arranged at two ends of the plurality of battery cells along the first direction to clamp the plurality of battery cells; a fixing member, two ends of the fixing member being connected to the first end plate and the second end plate respectively; and a connecting assembly, the connecting assembly comprising a sampling component and a busbar component, the busbar component being used for electrically connecting the electrode terminals of the plurality of battery cells, and the sampling component being used for monitoring and managing the states of the plurality of battery cells; wherein the connecting assembly is arranged between the fixing member and the battery cells. The battery device, the energy storage device, the energy storage system and the charging network can improve the structural stability and reliability of the battery device.

Description

Technical Field

[0001] This application relates to the field of batteries, and more specifically, to a battery device, an energy storage device, an energy storage system, and a charging network. Background Technology

[0002] In the development of battery technology, to improve the energy density of battery devices, a large number of individual battery cells are typically incorporated. However, increasing the number of individual cells can affect the structural stability of the battery device. For example, during transportation, increasing the number of individual cells increases the weight of the battery device, thus increasing the difficulty of moving and transporting it. Furthermore, during charging and discharging, increasing the number of individual cells increases the overall deformation, thereby affecting the reliability of the battery device. Summary of the Invention

[0003] This application provides a battery device, an energy storage device, an energy storage system, and a charging network, which can improve the structural stability and reliability of the battery device.

[0004] In a first aspect, a battery device is provided, comprising: a battery cell assembly including a plurality of battery cells arranged along a first direction, each battery cell having an electrode terminal disposed on a first wall; a first end plate and a second end plate disposed along the first direction at both ends of the plurality of battery cells to clamp the plurality of battery cells; a fixing member having its two ends respectively connected to the first end plate and the second end plate; and a connection assembly including a sampling component and a busbar component, the busbar component being used to electrically connect the electrode terminals of the plurality of battery cells, and the sampling component being used to monitor and manage the state of the plurality of battery cells; wherein the connection assembly is disposed between the fixing member and the battery cells.

[0005] In this embodiment, the connecting component is located between the fixing member and the battery cell. This eliminates the need for the connecting component to have an area that avoids the fixing member compared to placing the fixing member between the connecting component and the battery cell, thus reducing the processing and installation difficulty of the connecting component. Furthermore, if the battery cell within the battery cell assembly expands, causing deformation of the fixing member, the impact of the fixing member on the connecting component is minimal. This reduces the likelihood of the connecting component being damaged by deformation, stretching, or compression of the fixing member, thereby improving the structural stability of the connecting component.

[0006] In some embodiments, the first wall is provided with a pressure relief mechanism, and the connecting assembly is provided with a first hole corresponding to the pressure relief mechanism; wherein, the first hole corresponds to the pressure relief mechanism of a plurality of battery cells; or, the connecting assembly is provided with a plurality of first holes arranged along the first direction, and the plurality of first holes correspond one-to-one with the pressure relief mechanism of a plurality of battery cells. By providing the first hole, the obstruction of the connecting assembly to the emission can be reduced, the emission efficiency of the emission can be improved, thereby reducing the risk of thermal diffusion between multiple battery cells and improving the reliability of the battery device.

[0007] In some embodiments, the fixing member is provided with a second hole corresponding to the pressure relief mechanism; wherein the second hole corresponds to the pressure relief mechanism of a plurality of battery cells; or, the fixing member is provided with a plurality of the second holes arranged along the first direction, each of the plurality of second holes corresponding one-to-one with the pressure relief mechanism of a plurality of battery cells. The second hole is used to avoid the pressure relief mechanism, so that when the pressure relief mechanism is actuated, the emissions discharged from the pressure relief mechanism can be quickly discharged through the second hole, reducing the obstruction of the fixing member to the emissions, improving the emission efficiency of the emissions, thereby reducing the risk of thermal diffusion between the plurality of battery cells and improving the reliability of the battery device.

[0008] In some embodiments, the first wall is provided with two electrode terminals arranged along a second direction perpendicular to the first direction. The connection assembly includes two rows of busbars arranged along the second direction, each row of busbars including multiple busbars arranged along the first direction. Each busbar is used to electrically connect the electrode terminals of two adjacent battery cells. The connection assembly can integrate multiple busbars, facilitating the positioning and installation of the multiple busbars with the electrode terminals of the multiple battery cells, thereby improving the processing and assembly efficiency of the battery device.

[0009] In some embodiments, the sampling component includes a wiring harness located between the two busbars for monitoring and managing the voltage and / or temperature of the battery cell assembly. A pressure relief mechanism is provided on the first wall between the two electrode terminals, and the wiring harness is disposed in the area between the pressure relief mechanism and the electrode terminals. A fixing member is disposed opposite to the wiring harness and located on the side of the wiring harness away from the battery cell. The wiring harness is positioned in the area between the pressure relief mechanism and the electrode terminals to reduce obstruction of the pressure relief mechanism and to reduce obstruction of emissions discharged through the pressure relief mechanism, thus reducing the impact of emissions on the wiring harness. For example, it can reduce the risk of short circuits caused by conductive particles in the emissions.

[0010] In some embodiments, a gap is provided between the wiring harness and the fastener to reduce the mutual interference between the wiring harness and the fastener.

[0011] In some embodiments, a buffer is provided within the gap to protect the fastener and the wiring harness. For example, during the transportation and use of the battery device, the fastener and the wiring harness may deform or move. The buffer, clamped between the wiring harness and the fastener, reduces direct contact between them, thereby reducing their interaction and impact, and improving structural stability and reliability.

[0012] In some embodiments, the connection assembly includes a plurality of busbar components, a sampling component, and a fixing membrane, wherein the plurality of busbar components and the sampling component are located on the side of the fixing membrane away from the battery cell, and the fixing membrane fixes the positions of the plurality of busbar components and the monitoring unit.

[0013] In some embodiments, the plurality of the busbar components and the sampling components are fixed to the fixed membrane by hot pressing, which is easy to implement and provides structural stability.

[0014] In some embodiments, the distance between the fastener and the first wall along the thickness direction of the first wall ranges from 3.52 mm to 7.5 mm. By setting the distance between the fastener and the first wall of the battery cell to be greater than or equal to 3.52 mm, a connecting component can be accommodated between them, reducing the mutual influence between the fastener, the connecting component, and the underlying battery cell, thus improving structural stability. By setting the distance between the fastener and the first wall of the battery cell to be less than or equal to 7.5 mm, space in the thickness direction of the first wall can be saved, increasing the energy density of the battery device.

[0015] In a second aspect, an energy storage device is provided, comprising: a plurality of battery devices as described in the first aspect or any one of the embodiments of the first aspect, the battery device being used to store or provide electrical energy.

[0016] Thirdly, an energy storage system is provided, comprising: a power conversion device; and the energy storage device described in the second aspect, wherein the power conversion device is used to electrically connect a power generation device and the energy storage device.

[0017] Fourthly, a charging network is provided, comprising: a charging pile; an energy storage device as described in the second aspect or an energy storage system as described in the third aspect, the energy storage device being used to provide electrical energy to the charging pile. Attached Figure Description

[0018] Figure 1 This is an exploded view of a battery device according to an embodiment of this application;

[0019] Figure 2 This is a partial structural diagram of a battery device according to an embodiment of this application;

[0020] Figure 3This is another partial structural schematic diagram of a battery device according to an embodiment of this application;

[0021] Figure 4 This is an exploded view of a partial structure of a battery device according to an embodiment of this application;

[0022] Figure 5 This is a schematic diagram of the structure of a battery cell according to an embodiment of this application;

[0023] Figure 6 This is a top view schematic diagram of a partial structure of a connection component according to an embodiment of this application;

[0024] Figure 7 This is a side view of a partial structure of a battery device according to an embodiment of this application;

[0025] Figure 8 This is a structural block diagram of an energy storage system according to an embodiment of this application;

[0026] Figure 9 This is a structural block diagram of a charging network according to an embodiment of this application.

[0027] The accompanying drawings are not drawn to scale. Detailed Implementation

[0028] The technical solutions in the embodiments of this application will now be described with reference to the accompanying drawings.

[0029] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0030] Unless otherwise defined, all technical and scientific terms used in this application have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains; the terminology used in the description of this application is for the purpose of describing particular embodiments only and is not intended to limit the application; the terms "comprising" and "having," and any variations thereof, in the description, claims, and accompanying drawings of this application are intended to cover non-exclusive inclusion. The terms "first," "second," etc., in the description, claims, or accompanying drawings of this application are used to distinguish different objects, not to describe a specific order or hierarchy.

[0031] In this application, the reference to "embodiment" means that a specific feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a mutually exclusive, independent, or alternative embodiment. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described in this application can be combined with other embodiments.

[0032] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," and "attachment" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal communication between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0033] In this application, the term "and / or" is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, or B existing alone. Additionally, in this application, the character " / " generally indicates that the preceding and following related objects have an "or" relationship.

[0034] In the embodiments of this application, the same reference numerals denote the same components, and for the sake of brevity, detailed descriptions of the same components are omitted in different embodiments. It should be understood that the thickness, length, width, and other dimensions of various components in the embodiments of this application shown in the accompanying drawings, as well as the overall thickness, length, width, and other dimensions of the integrated device, are merely illustrative and should not constitute any limitation on this application.

[0035] In this application, "multiple" refers to two or more (including two), and similarly, "multiple groups" refers to two or more (including two), and "multiple pieces" refers to two or more (including two).

[0036] In the development of battery technology, to improve the energy density of battery devices, a large number of individual battery cells are typically incorporated. However, increasing the number of individual cells can affect the structural stability of the battery device. For example, during transportation, increasing the number of individual cells increases the weight and volume of the battery device, making movement and transportation more difficult. When moving the battery device, the anchor points are usually located at the edges, causing the central area to bend due to gravity, thus affecting the structural stability of the device. Furthermore, during charging and discharging, increasing the number of individual cells increases the overall deformation, thereby affecting the reliability of the battery device.

[0037] Therefore, embodiments of this application provide a battery device, an energy storage device, an energy storage system, and a charging network, which can solve the above-mentioned problems. The battery device of this application includes a battery cell assembly, a first end plate, a second end plate, a connecting assembly, and a fixing member. The battery cell assembly includes multiple battery cells arranged along a first direction, and each battery cell has an electrode terminal on its first wall. The first end plate and the second end plate are disposed at both ends of the multiple battery cells along the first direction to clamp the multiple battery cells. The two ends of the fixing member are respectively connected to the first end plate and the second end plate to fix the multiple battery cells. The connecting assembly includes a sampling component and a busbar component. The busbar component is used to electrically connect the electrode terminals of the multiple battery cells, thereby realizing the electrical connection between the multiple battery cells; the sampling component is used to detect and manage the state of the multiple battery cells. The connecting assembly is disposed between the fixing member and the battery cells. Therefore, compared to disposing of the fixing member between the connecting assembly and the battery cells, the connecting assembly does not need to have an area to avoid the fixing member, reducing the processing and installation difficulty of the connecting assembly. Furthermore, when multiple battery cells expand within the battery cell assembly, causing deformation of the fixing components, the impact of the fixing components on the connecting components is relatively small. This reduces the likelihood of the connecting components being damaged by deformation, stretching, or compression of the fixing components, thereby improving the structural stability of the connecting components.

[0038] Figure 1 An exploded view of the battery device 10 according to an embodiment of this application is shown. Figure 1 As shown, the battery device 10 of this embodiment includes a housing 11, which can be used to accommodate at least one battery cell 20. The housing 11 of this embodiment has a hollow internal structure, and at least one battery cell 20 is accommodated within the housing 11. Specifically, the housing 11 includes a first housing portion 111 and a second housing portion 112, which are sealed together. For example, the first housing portion 111 and the second housing portion 112 can be snapped together to form a hollow structure. The shape of the first housing portion 111 and the second housing portion 112 can be determined according to the shape of the components accommodated internally, for example, it can be determined according to the shape of a combination of multiple battery cells 20 accommodated internally.

[0039] In the embodiments of this application, at least one of the first housing portion 111 and the second housing portion 112 has an opening. For example, as Figure 1 As shown, the first box portion 111 and the second box portion 112 can both be hollow cuboids with one face as an opening. The openings of the first box portion 111 and the second box portion 112 are arranged opposite to each other, and the first box portion 111 and the second box portion 112 are interlocked to form a box 11 with a closed chamber, which can be used to accommodate at least one battery cell 20.

[0040] For example, unlike Figure 1 As shown, only one of the first housing portion 111 and the second housing portion 112 may be a hollow cuboid with an opening, while the other may be plate-shaped to cover the opening. Taking the first housing portion 111 as a hollow cuboid with one opening and the second housing portion 112 as a plate-shaped example, the second housing portion 112 is used to cover the opening of the first housing portion 111 to form a housing 11 with a closed chamber, which can be used to accommodate at least one battery cell 20.

[0041] like Figure 1 As shown, for ease of explanation, this application embodiment defines three directions: the length direction X of the battery device 10, the width direction Y of the battery device 10, and the height direction Z of the battery device 10. The length direction X, the width direction Y, and the height direction Z are perpendicular to each other, and the size of the battery device 10 in the length direction X is greater than the size in the width direction Y.

[0042] Figure 2 A partial structural schematic diagram of the battery device 10 according to an embodiment of this application is shown, for example, Figure 2 It can be Figure 1 A partial structural schematic diagram of the battery device 10 shown; Figure 3 Another partial structural schematic diagram of the battery device 10 according to an embodiment of this application is shown, for example, Figure 3 It can be Figure 2 Enlarged schematic diagram of region A in the middle; Figure 4 An exploded view of a partial structure of the battery device 10 according to an embodiment of this application is shown, for example, Figure 4 It can be Figure 3 An exploded view of a partial structure of the battery device 10 shown.

[0043] like Figures 2 to 4 As shown, the battery device 10 of this embodiment includes a battery cell assembly 200, a connecting assembly 12, and a fixing member 13. Specifically, the battery cell assembly 200 includes a plurality of battery cells 20 arranged along a first direction, and each battery cell 20 has an electrode terminal 202 disposed on its first wall 201; a first end plate 151 and a second end plate 152 are disposed at both ends of the plurality of battery cells 20 along the first direction to clamp the plurality of battery cells 20; the fixing member 13 has its two ends connected to the first end plate 151 and the second end plate 152 respectively; the connecting assembly 12 includes a sampling component 123 and a busbar component 122, the busbar component 122 is used to electrically connect the electrode terminals 202 of the plurality of battery cells 20, and the sampling component 123 is used to monitor and manage the status of the plurality of battery cells 20; wherein, the connecting assembly 12 is disposed between the fixing member 13 and the battery cells 20.

[0044] The battery device 10 mentioned in the embodiments of this application may include one or more battery cell assemblies 200 for providing voltage and capacity. For example, the battery device 10 may include a plurality of battery cell assemblies 200 arranged along its width direction Y. Each battery cell assembly 200 in the embodiments of this application may include a plurality of battery cells 20 arranged along a first direction, wherein the plurality of battery cells 20 may be connected in series, parallel, or mixed. For example, the first direction may be the length direction of the battery device 10, then the battery device 10 may include a plurality of battery cells 20 arranged along its length direction X.

[0045] In some embodiments, the battery cell assembly 200 of this application can be a battery module, which is formed by arranging and fixing multiple battery cells 20 to form an independent module. As an example, the battery module can be formed by binding multiple battery cells 20 together with one or more cable ties 14.

[0046] In some embodiments, the battery device 10 may be a battery pack, which includes a housing 11 and one or more battery cell assemblies 200, the battery cell assemblies 200 being housed within the housing 11. As an example, the battery cell assembly 200 may be a battery module, which can be housed within the housing 11 by fixing the battery module to the housing 11. As an example, the battery cell assembly 200 may also be housed within the housing 11 by directly fixing multiple battery cells 20 to the housing 11.

[0047] The battery cell 20 in this application embodiment can be a cylindrical battery cell, a prismatic battery cell, a pouch battery cell, or a battery cell 20 of other shapes. Prismatic battery cells include prismatic battery cells, blade-shaped battery cells, and multi-prismatic batteries, such as hexagonal prismatic batteries. This application has no particular limitations.

[0048] Figure 5 A schematic diagram of the structure of a battery cell 20 according to an embodiment of this application is shown. For example, the battery cell 20 is shown. Figure 5 The battery cell 20 shown can be any one of the battery cells 20 within the battery device 10. For example... Figures 2 to 5 As shown, the first wall 201 of the battery cell 20 in this embodiment of the application is provided with electrode terminals 202.

[0049] It should be understood that the electrode terminals 202 in this embodiment are used for electrical connection with the electrode assembly inside the battery cell 20 to output the electrical energy of the battery cell 20. Furthermore, the battery cell 20 may include at least two electrode terminals 202, each including at least one positive electrode terminal 2021 and at least one negative electrode terminal 2022. The positive electrode terminal 2021 is used for electrical connection with the positive electrode tab of the electrode assembly, and the negative electrode terminal 2022 is used for electrical connection with the negative electrode tab of the electrode assembly. The positive electrode terminal 2021 and the positive electrode tab can be directly connected or indirectly connected, and the negative electrode terminal 2022 and the negative electrode tab can be directly connected or indirectly connected. For example, the positive electrode terminal 2021 can be electrically connected to the positive electrode tab through a current collector, and the negative electrode terminal 2022 can be electrically connected to the negative electrode tab through a current collector.

[0050] In some embodiments, electrode terminals 202 can be located on any one or more walls of the battery cell 20, and multiple electrode terminals 202 can be located on the same or different walls. For example, the battery cell 20 can include a housing 204. The housing 204 can be a steel housing, an aluminum housing, a plastic housing (such as polypropylene), a composite metal housing (such as a copper-aluminum composite housing), or an aluminum-plastic film, etc. In some embodiments, the housing 204 can be a sealed structure or a non-sealed structure. As an example, when the housing 204 is a non-sealed structure, the housing 204 serves to protect the electrode assembly, and a sealing bag is also included between the housing 204 and the electrode assembly. The sealing bag is used to encapsulate the electrode assembly and electrolyte. Specifically, the sealing bag can be a bag-shaped insulating component or an aluminum-plastic film. When the housing 204 is a sealed structure, it is used to encapsulate components such as the electrode assembly and electrolyte.

[0051] In some embodiments, the housing 204 includes an end cap and a housing, the housing having an opening, and the end cap covering the opening. The housing may have one or more openings. The end cap may also be provided one or more.

[0052] The electrode terminals 202 in this embodiment can be located on any one or more walls of the housing 204. For example, as Figures 2 to 5 As shown, the embodiments of this application mainly take the battery cell 20 including two electrode terminals 202 as an example, and the electrode terminals 202 are located on the same wall of the housing 204. Here, it is taken that both electrode terminals 202 are located on the first wall 201 of the housing 204 as an example, but the embodiments of this application are not limited to this.

[0053] In some embodiments, the battery device 10 may further include a first end plate 151 and a second end plate 152, the two end plates being disposed along a first direction at both ends of a plurality of battery cells 20 of the battery cell assembly 200 to clamp the plurality of battery cells 20. For example, as Figures 2 to 5As shown, taking the length direction X of the battery device 10 as an example, the first end plate 151 and the second end plate 152 are arranged along the length direction X of the battery device 10, and the multiple battery cells 20 included in the battery cell assembly 200 are clamped between the two end plates to further improve the structural stability of the battery cell assembly 200.

[0054] In some embodiments, the battery device 10 may further include a fixing member 13 extending along a first direction, with its two ends connected to a first end plate 151 and a second end plate 152, respectively. The fixing member 13 is used to further fix multiple battery cells 20 of the battery cell assembly 200. Specifically, the fixing member 13 includes at least a portion extending along the first direction to pass through and restrict the fixing of multiple battery cells 20 along the first direction. This improves the structural strength and stability of the battery cell assembly 200, reduces displacement between multiple battery cells 20 in the battery cell assembly 200, and restricts deformation of the multiple battery cells 20, thereby reducing deformation of the connecting assembly 12 caused by the deformation of the multiple battery cells 20, thus improving the stability of the connecting assembly 12 and enhancing the structural stability and reliability of the battery device 10. For example, the fixing member 13 in this embodiment may be a steel strip to meet structural strength requirements, but this embodiment is not limited to this.

[0055] The connection component 12 in this application embodiment may include a busbar component 122 and a sampling component 123. For example, the connection component 12 may be a cell connection system (CCS).

[0056] The connection assembly 12 includes a busbar 122 that enables electrical connection of multiple battery cells 20. The connection assembly 12 is positioned towards the first wall 201 of the multiple battery cells 20, allowing the busbar 122 to electrically connect to the electrode terminals 202 of the multiple battery cells 20, thereby achieving electrical connection between the multiple battery cells 20. Connecting multiple battery cells 20 through the multiple busbars 122 of the connection assembly 12 results in a simple structure, ease of implementation, and high integration, saving space within the battery device 10 and thus improving the energy density of the battery device 10.

[0057] The connection component 12 in this embodiment further includes a sampling component 123, which is used to monitor and manage the status of multiple battery cells 20. For example, the sampling component 123 can be used to collect data from multiple battery cells 20, such as the voltage and / or temperature of the multiple battery cells 20, to promptly detect abnormalities in the battery cells 20 and to handle abnormalities in a timely manner, thereby improving the reliability of the battery device 10.

[0058] In this embodiment, the connecting component 12 is located between the fixing member 13 and the battery cell 20. Therefore, compared to placing the fixing member 13 between the connecting component 12 and the battery cell 20, the connecting component 12 does not need to have an area to avoid the fixing member 13. For example, it does not need to have a local protrusion on the connecting component 12 to avoid and install the fixing member 13, thus reducing the processing and installation difficulty of the connecting component 12. Furthermore, if the battery cell 20 within the battery cell assembly 200 expands, causing the fixing member 13 to deform, the impact of the fixing member 13 on the connecting component 12 is minimal. This reduces the likelihood of the connecting component 12 being damaged by the deformation, stretching, or compression of the fixing member 13, thereby improving the structural stability of the connecting component 12.

[0059] The structure of the connecting component 12 and the fastener 13 of the present application embodiment will now be described with reference to the accompanying drawings.

[0060] In some embodiments, a pressure relief mechanism 203 is provided on the casing 204 of the battery cell 20 of this application. The pressure relief mechanism 203 is used to release internal gas from the battery cell 20. As an example, the pressure relief mechanism 203 can be actuated to release internal pressure or temperature when the internal pressure or temperature of the battery cell 20 reaches a predetermined threshold. When the internal pressure or temperature of the battery cell 20 reaches the predetermined threshold, the pressure relief mechanism 203 performs an action or a weak structure provided in the pressure relief mechanism 203 is destroyed, thereby forming an opening or channel for internal pressure or temperature to be released. The threshold design varies depending on design requirements. The threshold may depend on the materials of one or more of the positive electrode, negative electrode, electrolyte, and separator in the battery cell 20.

[0061] The term "actuation" as used in this application refers to the pressure relief mechanism 203 being activated or undergoing a certain state, thereby releasing the internal pressure and temperature of the battery cell 20. The actions of the pressure relief mechanism 203 may include, but are not limited to: movement of components within the pressure relief mechanism 203 to form an exhaust channel, rupture, breakage, tearing, or opening of at least a portion of the pressure relief mechanism 203, etc. When the pressure relief mechanism 203 is actuated, the high-temperature, high-pressure substances inside the battery cell 20 are discharged outwards from the actuated portion as waste. This method enables pressure and temperature relief of the battery cell 20 under controllable pressure or temperature conditions, thereby preventing potentially more serious accidents.

[0062] As an example, the pressure relief mechanism 203 can be integrally formed with the housing 204. As an example, the pressure relief mechanism 203 can also be separately disposed from and connected to the housing 204. Furthermore, the pressure relief mechanism 203 can be located on any wall of the housing 204. For example, as... Figures 2 to 5 As shown, this application embodiment takes the first wall 201 as an example with a pressure relief mechanism 203, but this application embodiment is not limited to this.

[0063] In some embodiments, such as Figures 2 to 5 As shown, the first wall 201 is provided with two electrode terminals 202, and the pressure relief mechanism 203 is located between the two electrode terminals 202. Placing the electrode terminals 202 and the pressure relief mechanism 203 on the same wall of the housing 204 improves the integration of the battery cells 20 and facilitates processing. For example, the first wall 201 can be an end cap included in the housing 204, with both the electrode terminals 202 and the pressure relief mechanism 203 provided on the end cap, facilitating processing and assembly. Furthermore, placing the pressure relief mechanism 203 between the two electrode terminals 202 makes the first wall 201 relatively symmetrical, facilitating the electrical connection of the connecting assembly 12 to the electrode terminals 202 of multiple battery cells 20, thereby improving the processing and assembly efficiency of the battery device 10.

[0064] In some embodiments, when the housing 204 is a non-sealed structure, the pressure relief mechanism 203 can be configured as a through hole for discharging gas inside the battery cell 20.

[0065] The emissions from the battery cell 20 mentioned in this application include, but are not limited to: electrolyte, dissolved or split positive and negative electrode plates, fragments of separators, high-temperature and high-pressure gases generated by the reaction, flames, etc.

[0066] Figure 6 This diagram shows a top view of a partial structure of the connection component 12 according to an embodiment of this application. For example, the connection component 12 can be as follows: Figures 2 to 4 The diagram shows a top view of the connection assembly 12 included in the battery device 10, wherein... Figure 6 Only a top view schematic diagram of the partial structure of the two ends of the connecting component 12 along the length direction X of the battery device 10 is shown.

[0067] In some embodiments, the first wall 201 is provided with a pressure relief mechanism 203, and the connecting component 12 is provided with a first hole 121 corresponding to the pressure relief mechanism 203. The first hole 121 is used to avoid the pressure relief mechanism 203 so that when the pressure relief mechanism 203 is actuated, the emissions discharged from the pressure relief mechanism 203 can be quickly discharged through the first hole 121, reducing the obstruction of the connecting component 12 to the emissions, improving the emission efficiency of the emissions, thereby reducing the risk of thermal diffusion between multiple battery cells 20 and improving the reliability of the battery device 10.

[0068] It should be understood that the structure, size, and number of parameters of the first hole 121 of the connecting assembly 12 can be set according to the actual application. For example, the range of the orthographic projection of the first hole 121 toward the first wall 201 is usually greater than or equal to the pressure relief mechanism 203, so that the first hole 121 can fully expose the pressure relief mechanism 203 and reduce the obstruction effect of the connecting assembly 12 on the discharge.

[0069] In some embodiments, the shape of the first hole 121 of the connecting assembly 12 can be configured according to the shape of the pressure relief mechanism 203. For example, the shape of the first hole 121 projected onto the first wall 201 can be the same as or approximately the same as the shape of the pressure relief mechanism 203 on the surface of the first wall 201, to facilitate processing. For example, as Figures 2 to 6 As shown, on the surface of the first wall 201, the shape of the pressure relief mechanism 203 can be oval, and similarly, the shape of the orthographic projection of the first hole 121 toward the first wall 201 can also be oval.

[0070] It should be understood that the number of first holes 121 included in the connection component 12 of this application embodiment can be set according to actual application.

[0071] In some embodiments, the connecting component 12 is provided with a plurality of first holes 121 arranged along a first direction, and the plurality of first holes 121 correspond one-to-one with the pressure relief mechanisms 203 of a plurality of battery cells 20. For example... Figures 2 to 6 As shown, each first hole 121 corresponds to a pressure relief mechanism 203, so that the discharge from the corresponding pressure relief mechanism 203 is discharged through the first hole 121. In this way, the area occupied by all the first holes 121 of the connecting assembly 12 is smaller, which can improve the structural strength and stability of the connecting assembly 12 and reduce the risk of local damage to the connecting assembly 12.

[0072] Or, different from Figures 2 to 6 In the embodiment shown, the first hole 121 corresponds to the pressure relief mechanism 203 of a plurality of battery cells 20 arranged along the first direction. That is, by setting the same first hole 121, it can be used to avoid the pressure relief mechanism 203 of a plurality of battery cells 20, thereby reducing the number of first holes 121 provided on the connecting assembly 12 for easier processing.

[0073] In some embodiments, considering that the fastener 13 is also positioned towards the first wall 201 of the battery cell 20, in order to reduce the impact of the fastener 13 on the pressure relief mechanism 203, the fastener 13 can be positioned to avoid the pressure relief mechanism 203. For example, the fastener 13 can be positioned to correspond to an area where the pressure relief mechanism 203 is not located. For instance, if the pressure relief mechanism 203 is located in the central region of the first wall 201, the fastener 13 can be positioned towards the edge region of the first wall 201 to reduce obstruction of emissions discharged through the pressure relief mechanism 203. Alternatively, a second hole 131 can be provided in the fastener 13 to avoid the pressure relief mechanism 203.

[0074] In some embodiments, the fixing member 13 is provided with a second hole 131 corresponding to the pressure relief mechanism 203. The second hole 131 is used to avoid the pressure relief mechanism 203 so that when the pressure relief mechanism 203 is actuated, the emissions discharged from the pressure relief mechanism 203 can be quickly discharged through the second hole 131, reducing the obstruction of the fixing member 13 to the emissions, improving the emission efficiency of the emissions, thereby reducing the risk of thermal diffusion between multiple battery cells 20 and improving the reliability of the battery device 10.

[0075] It should be understood that the structure, size, and number of the second hole 131 of the fastener 13 can be set according to the actual application. For example, the range of the orthographic projection of the second hole 131 toward the first wall 201 is usually greater than or equal to the pressure relief mechanism 203, so that the second hole 131 can fully expose the pressure relief mechanism 203 and reduce the obstruction effect of the connecting assembly 12 on the discharge.

[0076] Furthermore, the range of the orthographic projection of the second hole 131 toward the first wall 201 is usually greater than or equal to the range of the orthographic projection of the first hole 121 of the connecting assembly 12 toward the first wall 201, so that the exhaust material discharged through the pressure relief mechanism 203 can pass smoothly through the first hole 121 and the second hole 131, reducing the obstruction effect of the connecting assembly 12 and the fastener 13 on the exhaust material, and also reducing the risk of exhaust material accumulating around the first hole 121 of the connecting assembly 12 and around the second hole 131 of the fastener 13.

[0077] In some embodiments, the shape of the second hole 131 of the fastener 13 can be configured according to the shape of the pressure relief mechanism 203 and / or the shape of the first hole 121 of the connecting assembly 12. For example, the shape of the second hole 131 as a projection toward the first wall 201 can be the same as or approximately the same as the shape of the pressure relief mechanism 203 on the surface of the first wall 201, to facilitate processing. As another example, the shape of the second hole 131 as a projection toward the first wall 201 can also be different from the shape of the pressure relief mechanism 203 on the surface of the first wall 201. For example, as... Figures 2 to 6 As shown, on the surface of the first wall 201, the shape of the pressure relief mechanism 203 can be oval, and the shape of the second hole 131 projected toward the first wall 201 can be rectangular. The embodiments of this application are not limited to this.

[0078] It should be understood that the number of second holes 131 included in the fastener 13 of this application embodiment can be set according to actual application.

[0079] In some embodiments, the second hole 131 corresponds to a pressure relief mechanism 203 of a plurality of battery cells 20 arranged along a first direction. For example... Figures 2 to 6As shown, by setting the same second hole 131, it can be used to avoid the pressure relief mechanism 203 of multiple battery cells 20, reducing the number of second holes 131 set on the fixing member 13, so as to facilitate processing.

[0080] Or, different from Figures 2 to 6 In the illustrated embodiment, the fastener 13 is provided with a plurality of second holes 131 arranged along a first direction, each second hole 131 corresponding one-to-one with a pressure relief mechanism 203 of a plurality of battery cells 20. Each second hole 131 corresponds to one pressure relief mechanism 203, so that the emissions discharged by the corresponding pressure relief mechanism 203 are discharged through the second hole 131. In this way, the area occupied by all the second holes 131 on the fastener 13 is smaller, which can improve the structural strength and stability of the second holes 131 and reduce the risk of local damage to the fastener 13.

[0081] It should be understood that the connection component 12 in this embodiment can be used to realize electrical connection between multiple battery cells 20. For example, the connection component 12 includes at least a busbar component 122 for electrically connecting the electrode terminals 202. The busbar component 12 included in the connection component 12 can be arranged according to the position of the electrode terminals 202 of the battery cells 20.

[0082] In some embodiments, the first wall 201 is provided with two electrode terminals 202 arranged along a second direction, which is perpendicular to the first direction. The connection assembly 12 includes two rows of busbars 122 arranged along the second direction. Each row of busbars 122 includes a plurality of busbars 122 arranged along the first direction. Each busbar 122 is used to electrically connect the electrode terminals 202 of two adjacent battery cells 20. Specifically, as shown... Figures 2 to 6 As shown, taking the width direction Y of the battery device 10 as an example, this second direction is also the length direction of the battery cell 20. Correspondingly, the first direction can be the length direction X of the battery device 10, which is also the thickness direction of the battery cell 20. The first wall 201 of the battery cell 20 is provided with two electrode terminals 202 arranged along the width direction Y of the battery device 10. Then, the battery cell assembly 200 includes a plurality of battery cells 20 having two rows of electrode terminals 202 arranged along the width direction Y of the battery device 10. Each row of electrode terminals 202 includes a plurality of electrode terminals 202 arranged along the length direction X of the battery device 10.

[0083] Correspondingly, the electrode terminals 202 of multiple battery cells 20 can be electrically connected through two rows of busbars 122 arranged along the width direction Y of the battery device 10 via the connecting assembly 12, thereby realizing the electrical connection of multiple battery cells 20 in the battery cell assembly 200. Each row of busbars 122 includes multiple busbars 122 arranged along the length direction X of the battery device 10, and each busbar 122 can be used to electrically connect the electrode terminals 202 of two adjacent battery cells 20 arranged along the length direction X of the battery device 10.

[0084] The connecting component 12 can integrate multiple busbar components 122, which facilitates the positioning and installation of the multiple busbar components 122 with the electrode terminals 202 of the multiple battery cells 20, thereby improving the processing and assembly efficiency of the battery device 10.

[0085] In some embodiments, the sampling component 123 includes a wiring harness 1231 located between two rows of busbars 122, the wiring harness 1231 being used to monitor and manage the voltage and / or temperature of the battery cell assembly 200. Figures 2 to 6 As shown, the wiring harness 1231 of the sampling component 123 can monitor and manage the status information of the multiple battery cells 20 included in the battery cell assembly 200. This status information can include the voltage and / or temperature of the multiple battery cells 20 included in the battery cell assembly 200, thereby monitoring the battery cell assembly 200 and promptly detecting any abnormal status of the battery cells 20 at any location within the battery cell assembly 200, and then taking timely action to improve the reliability of the battery device 10.

[0086] It should be understood that one end of the wiring harness 1231 in this embodiment may include a data acquisition terminal, which is disposed at different locations of the battery cell assembly 200 to acquire state information of the battery cell assembly 200. For example, the wiring harness 1231 in this embodiment may include at least one voltage acquisition data line and at least one temperature acquisition data line. Specifically, one end of each voltage acquisition data line may be a data acquisition end for acquiring the voltage of the battery cell 20 of the battery cell assembly 200; one end of each voltage acquisition data line may be a data acquisition end for acquiring the temperature of the battery cell 20 of the battery cell assembly 200. For example, the sampling end of each voltage acquisition data line may be connected to the busbar 122 to acquire the voltage of the busbar 122, which can be used to determine the voltage of the battery cell 20 connected to the busbar 122. Similarly, the sampling end of each temperature acquisition data line may be connected to the busbar 122 to acquire the temperature of the busbar 122, which can be used to determine the temperature of the battery cell 20 connected to the busbar 122.

[0087] Furthermore, the sampling component 123 in this embodiment may further include a first connector 1232, the other end of which can be connected to a port of the first connector 1232. The first connector 1232 may include multiple ports to connect the wire harness 1231 having multiple data lines. Specifically, the connection end of the voltage acquisition data line and the connection end of each temperature acquisition data line can be connected to a port of the first connector 1232.

[0088] In some embodiments, the first connector 1232 can be used to connect to the control unit of the battery device 10. For example, the control unit may include a second connector. By connecting the first connector 1232 to the second connector, the control unit can receive and process the status information of the battery cell assembly 200 collected by the acquisition terminals of the wiring harness 1231. For example, the control unit of the battery device 10 may be located in a Battery Management System (BMS), and the BMS collects and processes the status information of the battery cell assembly 200. As another example, the control unit can receive the voltage of the busbar 122 measured by the sampling terminal of the voltage acquisition data line and the temperature of the busbar 122 measured by the sampling terminal of the temperature acquisition data line through the connected first connector 1232 and second connector. Based on the voltage and temperature of the busbar 122, the control unit can determine the voltage and temperature of the battery cell 20 connected to the busbar 122, thereby realizing the monitoring of the battery cell 20.

[0089] In addition, the wiring harness 1231 is placed between the two rows of bus components 122 to facilitate the setting and connection of the acquisition terminals of the wiring harness 1231, thereby saving space.

[0090] In some embodiments, the location of the acquisition terminal of the wiring harness 1231 can be set according to the actual application. For example, the acquisition terminal can be located in the area where the electrode terminal 202 of the battery cell 20 is located, or in the area close to the electrode terminal 202. By acquiring the voltage and / or temperature of the electrode terminals 202 of multiple battery cells 20 in the battery cell assembly 200, the state of the battery cell 20 with the electrode terminal 202 is determined. As another example, the acquisition terminal can also be located in the area where the busbar component 122 is located, or in the area close to the busbar component 122. By acquiring the voltage and / or temperature of the busbar component 122, the state of the battery cell 20 connected to the busbar component 122 is determined. This application embodiment uses the acquisition terminal being located in the busbar component 122 as an example, but this application embodiment is not limited to this.

[0091] It should be understood that the specific configuration of the wiring harness 1231 in this application embodiment can be configured according to actual application. For example, a set of wiring harnesses 1231 can be used to collect the status information of all battery cell components 200, or a set of wiring harnesses 1231 can be used to collect the information of all busbar components 122, so as to facilitate the configuration and connection of the wiring harnesses 1231.

[0092] For example, the sampling component 123 may include two sets of wiring harnesses 1231, each corresponding to one of the two rows of busbars 122. Each set of wiring harnesses 1231 is used to monitor and manage the status information of the battery cells 20 connected to the corresponding row of busbars 122. For example, the status information may include the voltage and / or temperature of the battery cells 20. Figures 2 to 6 As shown, when the battery cell assembly 200 includes a large number of battery cells 20, two sets of wiring harnesses 1231 can be set up to correspond to two columns of busbars 122 respectively. For example, each wiring harness 1231 can be used to collect the voltage and / or temperature of a corresponding column of busbars 122 to monitor and manage the voltage and / or temperature of the battery cells 20 connected to that column of busbars 122. This reduces the difficulty of connecting the wiring harnesses 1231 and facilitates the collection of information from the wiring harnesses 1231. Furthermore, each set of wiring harnesses collects the status information of a corresponding column of busbars 122, making it easier to monitor the two columns of busbars 122 separately and facilitating the management of the two columns of busbars 122.

[0093] It should be understood that the specific location of the wire harness 1231 in this embodiment can be set according to actual application. For example, the first wall 201 is provided with a pressure relief mechanism 203, which is located between two electrode terminals 202. The wire harness 1231 corresponds to the area between the pressure relief mechanism 203 and the electrode terminals 202, so as to reduce the obstruction of the wire harness 1231 to the pressure relief mechanism 203. It can also reduce the obstruction of the wire harness 1231 to the exhaust discharged through the pressure relief mechanism 203, and reduce the impact of the exhaust on the wire harness 1231. For example, it can reduce the risk of short circuit of the wire harness 1231 caused by conductive particles in the exhaust.

[0094] In some embodiments, such as Figures 2 to 6 As shown, if the connecting assembly 12 includes two sets of wire harnesses, each set of wire harnesses 1231 can be correspondingly disposed in the area between the pressure relief mechanism 203 and a corresponding row of electrode terminals 202, that is, each set of wire harnesses 1231 can be disposed between a corresponding row of busbars 122 and the first hole 121. Alternatively, unlike... Figures 2 to 6 As shown, if the connecting component 12 includes a set of wire harnesses 1231, the set of wire harnesses 1231 can be correspondingly disposed in the area between the pressure relief mechanism 203 and any column of electrode terminals 202, that is, the wire harnesses 1231 can be located between any column of busbar components 122 and the first hole 121.

[0095] In some embodiments, the fastener 13 is disposed corresponding to the wiring harness 1231 and is located on the side of the wiring harness 1231 away from the battery cell 20. For example... Figures 2 to 6 As shown, the wiring harness 1231 can correspond to the area between the pressure relief mechanism 203 and the electrode terminal 202. For example, each set of wiring harnesses 1231 can be located between a corresponding row of busbar components 122 and the first hole 121. The fastener 13 is provided corresponding to the wiring harness 1231. For example, the second hole 131 of the fastener 13 is provided corresponding to the first hole 121, and other areas of the fastener 13 can be provided corresponding to the wiring harnesses 1231 located around the first hole 121, so as to facilitate the installation of the fastener 13 and the connecting assembly 12 and reduce the impact of the fastener 13 on the busbar component 122.

[0096] In some embodiments, there is a gap between the wire harness 1231 and the fixing member 13, that is, along the thickness direction of the connecting assembly 12, there is a certain gap between the wire harness 1231 and the fixing member 13, so as to reduce the mutual influence between the wire harness 1231 and the fixing member 13.

[0097] In some embodiments, a buffer is provided within the gap to protect the fastener 13 and the wiring harness 1231. For example, during the transportation and use of the battery device 10, the fastener 13 and the wiring harness 1231 may deform or move. The buffer, held between the wiring harness 1231 and the fastener 13, reduces direct contact between them, thereby reducing their interaction and impact and improving structural stability and reliability.

[0098] In some embodiments, the cushioning element may be foam for ease of implementation.

[0099] In some embodiments, multiple buffers may be spaced apart within the gap. For example, considering that both the fastener 13 and the wire harness 1231 have portions extending along the first direction, multiple buffers may be spaced apart along the first direction within the gap between them to protect the fastener 13 and the wire harness 1231 in different areas, and also to save on buffers.

[0100] Figure 7 A side view schematic diagram of a partial structure of the battery device 10 according to an embodiment of this application is shown, for example, Figure 7 It can be Figure 2 and Figure 3 A side view of a partial structure of the battery device 10 shown.

[0101] In some embodiments, the distance L between the fixing member 13 and the first wall 201 along the thickness direction of the first wall 201 ranges from [3.52mm, 7.5mm]. Figure 7As shown, taking the thickness direction of the first wall 201 as the height direction Z of the battery device 10 as an example, by setting the distance L between the fixing member 13 and the first wall 201 of the battery cell 20 to be greater than or equal to 3.52 mm, the connecting component 12 can be accommodated between them, reducing the mutual influence between the fixing member 13, the connecting component 12, and the battery cell 20 below, and improving structural stability. By setting the distance L between the fixing member 13 and the first wall 201 of the battery cell 20 to be less than or equal to 7.5 mm, space in the thickness direction of the first wall 201 can be saved, for example, space along the height direction Z of the battery device 10 can be saved, thereby increasing the energy density of the battery device 10.

[0102] In some embodiments, the distance L between the fastener 13 and the first wall 201 along the thickness direction of the first wall 201 can also be set to a range of [5.15mm, 6.7mm], which can improve structural stability and save space.

[0103] In some embodiments, along the thickness direction of the first wall 201, the distance L between the fixing member 13 and the first wall 201 can be any one of the following values ​​or between any two of the following values: 3.52mm, 3.8mm, 4mm, 4.3mm, 4.5mm, 4.8mm, 5mm, 5.15mm, 5.3mm, 5.5mm, 5.8mm, 6mm, 6.2mm, 6.5mm, 6.7mm, 7mm, 7.3mm, or 7.5mm.

[0104] In some embodiments, the connection assembly 12 includes a plurality of busbar components 122, a sampling component 123, and a fixing membrane 124. The plurality of busbar components 122 and the sampling component 123 are located on the side of the fixing membrane 124 away from the battery cell 20. On the one hand, the fixing membrane 124 facilitates fixing the positions of the plurality of busbar components 122 and the sampling component 123. On the other hand, the fixing membrane 124 also has an insulating function to isolate the first wall 201 of the battery cell 20 from other components. For example, it can be used to isolate the electrode terminals 202 of the first wall 201 from other metal components to reduce the risk of short circuit and improve insulation performance.

[0105] In some embodiments, the fixing membrane 124 of this application embodiment can be fixed to multiple busbar components 122 and sampling components 123 in various ways. For example, multiple busbar components 122 and sampling components 123 can be fixed to the fixing membrane 124 by hot pressing, that is, the fixing membrane 124 can be a hot-pressed membrane, the fixing method is easy to implement and the structure is stable.

[0106] According to some embodiments of this application, this application also provides an electrical device, including the battery device 10 described in any of the above embodiments, and the battery device 10 is used to provide electrical energy to the electrical device.

[0107] The technical solutions described in the embodiments of this application are applicable to various electrical devices that use battery device 10, such as mobile phones, portable devices, laptops, electric vehicles, electric toys, power tools, vehicles, ships, and spacecraft, etc. For example, spacecraft include airplanes, rockets, space shuttles, and spacecraft. The electrical device can be any of the aforementioned devices or systems that use battery devices.

[0108] This application provides an energy storage device 1, which may include one or more battery clusters to increase the voltage and capacity of the energy storage device 1. The battery cluster may include multiple battery devices 10 as described in any of the above embodiments. The multiple battery devices 10 are connected in series and / or in parallel via busbars to increase the voltage of the energy storage device 1. When the energy storage device 1 includes multiple battery clusters, the multiple battery clusters are connected in parallel to increase the capacity of the energy storage device 1.

[0109] The energy storage device 1 can be used in energy storage power stations, wind power generation systems, solar power generation systems, mobile power systems, or temporary power supply systems, etc. The energy storage device 1 can store electrical energy as needed and output it when appropriate. For example, the energy storage device 1 can store electrical energy during off-peak hours and provide power to relevant users or electrical devices during peak hours. The energy storage system provided in this application embodiment can be any power system that requires the use of the energy storage device 1.

[0110] In some embodiments, the energy storage device 1 is an energy storage container or an energy storage cabinet.

[0111] In some embodiments, the energy storage device 1 may include a cabinet and one or more battery clusters, with the battery clusters housed in the cabinet.

[0112] In some embodiments, the energy storage device 1 may further include modules such as a thermal management module, a main control module, a central control module, a power distribution module, and a fire protection module. Exemplarily, at least some of the above modules may be housed within the storage chamber of the energy storage device 1.

[0113] As an example, the thermal management module may include a liquid cooling unit that supplies coolant to each battery device 10 via piping for regulating the temperature of the individual battery cells.

[0114] As an example, the main control module can serve as the battery management unit for the battery cluster, used to monitor and manage the battery cluster. The main control module can monitor information such as the current, voltage, power, or temperature of the battery cluster. For instance, it can control the charging and discharging current and voltage of the battery cluster. The main control module includes modules such as an auxiliary battery management unit (SBMU) and a fusion switch.

[0115] As an example, the central control module can serve as the battery management unit for energy storage device 1, used to monitor and manage it. The central control module can monitor information such as current, voltage, power, state of charge, and temperature of energy storage device 1. For example, it can control the charging and discharging current and voltage of energy storage device 1. As an example, the central control module includes modules such as an insulation monitoring module (IMM), a master battery management unit (MBMU), an Ethernet (ETH) module, and a fiber optic conversion module.

[0116] As an example, a fire protection system includes control panels, detectors, alarm devices, etc., used to detect, alarm, or extinguish fires in energy storage systems.

[0117] As an example, the power distribution device can be used to distribute power to the power modules of the energy storage device 1.

[0118] According to some embodiments of this application, this application also provides an energy storage system, including the energy storage device 1 described in any of the above embodiments. Figure 8 A structural block diagram of an energy storage system according to an embodiment of this application is shown. In some embodiments, such as... Figure 8 As shown, the energy storage system may include one or more energy storage devices 1 and a power converter system (PCS) 2, wherein the power converter 2 is used to connect between the power generation device 3 and the energy storage device 1. The power generation device 3 is used to generate electrical energy, and the electrical energy generated by the power generation device 3 can be stored in the energy storage device 1 through the power converter 2. As an example, the power generation device 3 may specifically be a solar panel, a hydroelectric power generation device, a thermal power generation device, a wind power generation device, etc. The specific type of the power generation device 3 is not limited in this application.

[0119] According to some embodiments of this application, this application provides a charging network. Figure 9 A structural block diagram of a charging network according to an embodiment of this application is shown. Figure 9 As shown, the charging network includes a charging pile 4 and an energy storage device 1. The charging pile 4 is electrically connected to the energy storage device 1, which provides power to the charging pile 4. The charging pile 4 is electrically connected to a battery device in the energy storage device 1 via a cable, allowing the battery device to supply its stored energy to the charging pile 4. The charging pile 4 has one or more connectors 5 for connecting to electrical devices (such as vehicles) to replenish their power.

[0120] The energy storage device 1 can be located inside the charging pile (e.g., an integrated energy storage and charging unit) or outside the charging pile.

[0121] According to some embodiments of this application, see Figures 2 to 7 This application provides a battery device 10, which includes: a battery cell assembly 200, the battery cell assembly 200 including a plurality of battery cells 20 arranged along a first direction, each battery cell 20 having an electrode terminal 202 disposed on a first wall 201; a first end plate 151 and a second end plate 152 disposed along the first direction at both ends of the plurality of battery cells 20 to clamp the plurality of battery cells 20; a fixing member 13, the two ends of the fixing member 13 being respectively connected to the first end plate 151 and the second end plate 152; and a connection assembly 12, the connection assembly 12 including a sampling component 123 and a busbar component 122, the busbar component 122 being used to electrically connect the electrode terminals 202 of the plurality of battery cells 20, and the sampling component 123 being used to monitor and manage the status of the plurality of battery cells 20; wherein, the connection assembly 12 is disposed between the fixing member 13 and the battery cells 20.

[0122] The first wall 201 is provided with a pressure relief mechanism 203, and the connecting component 12 is provided with a first hole 121 corresponding to the pressure relief mechanism 203; wherein, the first hole 121 corresponds to the pressure relief mechanism 203 of a plurality of battery cells 20; or, the connecting component 12 is provided with a plurality of first holes 121 arranged along a first direction, and the plurality of first holes 121 correspond one-to-one with the pressure relief mechanism 203 of a plurality of battery cells 20.

[0123] The fixing member 13 is provided with a second hole 131 corresponding to the pressure relief mechanism 203; wherein the second hole 131 corresponds to the pressure relief mechanism 203 of the multiple battery cells 20; or, the fixing member 13 is provided with a plurality of second holes 131 arranged along the first direction, and the plurality of second holes 131 correspond one-to-one with the pressure relief mechanism 203 of the multiple battery cells 20.

[0124] The first wall 201 is provided with two electrode terminals 202 arranged along a second direction, which is perpendicular to the first direction. The connection assembly 12 includes two rows of busbars 122 arranged along the second direction. Each row of busbars 122 includes multiple busbars 122 arranged along the first direction. Each busbar 122 is used to electrically connect the electrode terminals 202 of two adjacent battery cells 20.

[0125] The sampling component 123 includes a wiring harness 1231 located between two rows of busbars 122. The wiring harness 1231 is used to monitor and manage the voltage and / or temperature of the battery cell assembly 200. A pressure relief mechanism 203 is provided on the first wall 201, located between two electrode terminals 202. The wiring harness 1231 is located in the area between the pressure relief mechanism 203 and the electrode terminals 202. A fixing member 13 is provided corresponding to the wiring harness 1231 and is located on the side of the wiring harness 1231 away from the battery cell 20.

[0126] The connection assembly 12 includes multiple busbars 122, sampling components 123, and a fixing membrane 124. The multiple busbars 122 and sampling components 123 are located on the side of the fixing membrane 124 away from the battery cell 20. The multiple busbars 122 and sampling components 123 are fixed to the fixing membrane 124 by heat pressing.

[0127] Along the thickness direction of the first wall 201, the distance between the fastener 13 and the first wall 201 ranges from [3.52mm, 7.5mm].

[0128] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and not to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. These modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application, and they should all be covered within the scope of the claims and specification of this application. In particular, as long as there is no structural conflict, the various technical features mentioned in the embodiments can be combined in any way. This application is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. A battery device, characterized in that, include: A battery cell assembly (200) includes a plurality of battery cells (20) arranged along a first direction, and each battery cell (20) has an electrode terminal (202) disposed on its first wall (201). A first end plate (151) and a second end plate (152) are disposed at both ends of the plurality of battery cells (20) along the first direction to clamp the plurality of battery cells (20); A fastener (13), the two ends of which are respectively connected to the first end plate (151) and the second end plate (152); and A connection component (12) includes a sampling component (123) and a busbar component (122). The busbar component (122) is used to electrically connect the electrode terminals (202) of a plurality of battery cells (20). The sampling component (123) is used to monitor and manage the status of the plurality of battery cells (20). The connecting component (12) is disposed between the fixing member (13) and the battery cell (20).

2. The battery device according to claim 1, characterized in that, The first wall (201) is provided with a pressure relief mechanism (203), and the connecting component (12) is provided with a first hole (121) corresponding to the pressure relief mechanism (203); Wherein, the first hole (121) corresponds to the pressure relief mechanism (203) of the plurality of battery cells (20); or, The connecting component (12) is provided with a plurality of first holes (121) arranged along the first direction, and the plurality of first holes (121) correspond one-to-one with the pressure relief mechanism (203) of the plurality of battery cells (20).

3. The battery device according to claim 2, characterized in that, The fixing member (13) is provided with a second hole (131) corresponding to the pressure relief mechanism (203); Wherein, the second hole (131) corresponds to the pressure relief mechanism (203) of the plurality of battery cells (20); or, The fixing member (13) is provided with a plurality of second holes (131) arranged along the first direction, and the plurality of second holes (131) correspond one-to-one with the pressure relief mechanism (203) of the plurality of battery cells (20).

4. The battery device according to any one of claims 1 to 3, characterized in that, The first wall (201) is provided with two electrode terminals (202) arranged along a second direction, which is perpendicular to the first direction. The connection assembly (12) includes two rows of busbars (122) arranged along the second direction. Each of the two rows of busbars (122) includes a plurality of busbars (122) arranged along the first direction. Each busbar (122) is used to electrically connect the electrode terminals (202) of two adjacent battery cells (20).

5. The battery device according to claim 4, characterized in that, The sampling component (123) includes a wiring harness (1231) located between the two rows of busbars (122), and the wiring harness (1231) is used to monitor and manage the voltage and / or temperature of the battery cell assembly (200); The first wall (201) is provided with a pressure relief mechanism (203), which is located between the two electrode terminals (202), and the wire harness (1231) is disposed in the area between the pressure relief mechanism (203) and the electrode terminals (202); The fastener (13) is provided corresponding to the wiring harness (1231) and is located on the side of the wiring harness (1231) away from the battery cell (20).

6. The battery device according to claim 5, characterized in that, There is a gap between the wire harness (1231) and the fastener (13).

7. The battery device according to claim 6, characterized in that, A buffer element is provided within the gap.

8. The battery device according to any one of claims 1 to 7, characterized in that, The connection assembly (12) includes a plurality of busbar components (122), a sampling component (123), and a fixing membrane (124), wherein the plurality of busbar components (122) and the sampling component (123) are located on the side of the fixing membrane (124) away from the battery cell (20).

9. The battery device according to claim 8, characterized in that, The multiple busbar components (122) and the sampling components (123) are fixed to the fixed membrane (124) by hot pressing.

10. The battery device according to any one of claims 1 to 9, characterized in that, Along the thickness direction of the first wall (201), the distance between the fastener (13) and the first wall (201) ranges from [3.52mm, 7.5mm].

11. An energy storage device, characterized in that, include: Multiple battery devices according to any one of claims 1 to 10, the battery devices being used to store or provide electrical energy.

12. An energy storage system, characterized in that, include: Power conversion device; The energy storage device as claimed in claim 11, wherein the power conversion device is used to electrically connect the power generation device and the energy storage device.

13. A charging network, characterized in that, include: Charging stations; The energy storage device as described in claim 11 or the energy storage system as described in claim 12, wherein the energy storage device is used to provide electrical energy to the charging pile.

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