Battery device, energy storage device and electric equipment

Abstract

The utility model relates to the technical field of battery equipment, and discloses a battery device, an energy storage device and electric equipment. The battery device comprises a box main body which is provided with an assembling space; the plurality of single batteries are arranged in the assembly space, and each single battery comprises an electrode terminal; each pressing strip assembly comprises a pressing strip component and a plurality of bar pieces, the bar pieces are fixedly connected to the pressing strip component in an insulating mode, any two adjacent bar pieces are arranged in an insulating mode, the bar pieces are electrically connected with the electrode terminals, the two ends of each pressing strip component are connected to the box body, and the pressing strip components are connected to the pressing strip component. Each bead member simultaneously abuts against the shoulders of the plurality of battery cells. By applying the technical scheme, the problems that in an existing battery device, the efficiency of assembling the chips is low, and the battery monomers are loosened and shaken relative to the battery box body due to the fact that the pressing strips do not press the battery monomers in place are solved.

Description

Technical Field

[0001] This application belongs to the field of battery equipment technology, and in particular relates to a battery device, energy storage device and electrical equipment. Background Technology

[0002] Current battery devices include a battery housing and multiple battery cells. The battery cells are installed inside the battery housing and are electrically connected by multiple terminals, enabling series, parallel, or mixed connections between the battery cells. Furthermore, the battery device includes multiple pressure bars that press the battery cells firmly against the battery housing.

[0003] In related technologies, when assembling the battery pack and pressure strip, the battery pack is first connected to the electrode terminals of the battery cell, and then the pressure strip is pressed against the shoulder of the battery cell, with both ends of the pressure strip connected to the battery housing. Multiple battery packs need to be connected to the electrode terminals of their respective battery cells one by one, resulting in low assembly efficiency and impacting the overall assembly efficiency of the battery device. Furthermore, the pressure strip has a certain span when pressing against the shoulders of multiple battery cells, and since only both ends of the pressure strip are fixed to the battery housing, it may tilt upwards, causing insufficient pressure on the battery cells and resulting in looseness and wobbling of the battery cells relative to the battery housing. Utility Model Content

[0004] The purpose of this application is to provide a battery device, an energy storage device, and an electrical device, including but not limited to solving the problem of low efficiency in the assembly of battery cells in current battery devices.

[0005] To achieve the above objectives, according to a first aspect of an embodiment of this application, a battery device is provided, comprising:

[0006] The main body of the box forms an assembly space;

[0007] Multiple battery cells are arranged within the assembly space, and each battery cell includes electrode terminals;

[0008] Multiple pressure strip assemblies, each pressure strip assembly includes a pressure strip member and multiple pads, the multiple pads are fixed and insulatedly connected to the pressure strip member, any two adjacent pads are insulated from each other, the pads are electrically connected to the electrode terminals to enable multiple battery cells to be connected in series, in parallel or in combination, the two ends of the pressure strip member are respectively connected to the main body of the box, and each pressure strip member simultaneously abuts against the shoulder of multiple battery cells.

[0009] In the process of assembling this battery device, after assembling multiple battery cells into the assembly space of the main body, the various pressure strip assemblies are assembled as a whole. That is, the pads are electrically connected to the electrode terminals of the corresponding battery cells to enable series, parallel, or mixed connections between multiple battery cells. The two ends of the pressure strip members are respectively connected to the corresponding positions on the opposite main body, and each pressure strip member simultaneously abuts against the shoulders of multiple battery cells. In this way, when placing each pressure strip assembly, one pressure strip member and multiple pads can be placed simultaneously. Then, each pad is connected to the electrode terminals of the corresponding battery cells, and the two ends of the pressure strip member are connected to the corresponding positions on the main body. Compared with the related technology that places and connects pads one by one, and then places the pressure strip and connects it to the battery box, the battery device provided in this application, which uses pressure strip assemblies for overall assembly, can significantly improve the connection and assembly efficiency.

[0010] In some embodiments of this application, the main body of the box includes a base plate and four box beams. The four box beams are connected end-to-end to the base plate to form an assembly space. The box beams enhance the overall mechanical strength of the main body of the box, ensuring that the overall mechanical strength of the main body of the box meets the strength requirements of the battery device in assembly and use. The two ends of the pressure strip member are respectively connected to two opposite and parallel box beams, and the extension direction of the pressure strip member is perpendicular to the extension direction of the box beams.

[0011] In some embodiments of this application, the main body of the enclosure includes a base plate, four box beams, and a structural beam. The four box beams are connected end-to-end to the base plate to form an assembly space. The two ends of the structural beam are respectively connected to two opposite box beams, and the extension direction of the structural beam is parallel to the extension direction of the other two opposite box beams. In addition to improving the mechanical strength of the main body through the box beams, the structural beam further enhances the overall mechanical strength of the main body, ensuring that the overall mechanical strength of the main body meets the strength requirements of the battery device in assembly and use. One end of the pressure strip member is connected to the structural beam, and the other end is connected to the corresponding box beam. The extension direction of the pressure strip member is perpendicular to the extension direction of the structural beam.

[0012] In some embodiments of this application, the main body of the enclosure includes a base plate, four box beams, and multiple structural beams. The four box beams are connected end-to-end to the base plate to form an assembly space. The multiple structural beams are spaced apart and arranged in parallel. The two ends of each structural beam are connected to two opposite box beams, and the extension direction of the structural beams is parallel to the extension direction of the other two opposite box beams. In addition to enhancing the mechanical strength of the main body through the box beams, the multiple structural beams further enhance the overall mechanical strength of the main body, ensuring that the overall mechanical strength of the main body meets the strength requirements of the battery device in assembly and use. Along a direction perpendicular to the extension direction of the structural beams, one end of a portion of the pressure strip members is connected to a box beam, and the other end is connected to a structural beam adjacent to the box beam; the two ends of another portion of the pressure strip members are connected to two adjacent structural beams, wherein the extension direction of the pressure strip members is perpendicular to the extension direction of the structural beams.

[0013] In some embodiments of this application, the pressure strip member is straight. Multiple battery cells are stacked sequentially along the extension direction of the pressure strip member to form a battery cell assembly. These battery cell assemblies are arranged in a rectangular array within the assembly space. Each battery cell assembly has its shoulders abutted by a pressure strip member. Since the pressure strip assembly is an integral structure with multiple tabs fixedly connected to it, the tabs provide a connecting and pulling effect on the pressure strip member, preventing it from warping due to the span distance.

[0014] In some embodiments of this application, a retaining strip is provided between two adjacent battery cell assemblies, and the shoulders of the two adjacent battery cell assemblies simultaneously abut against the retaining strip. In the width direction perpendicular to the extending direction of the retaining strip, multiple pads are symmetrically arranged in two rows relative to the retaining strip. This reduces the number of retaining strips, thereby helping to reduce the overall weight of the battery device and achieve weight reduction.

[0015] In some embodiments of this application, each battery cell assembly corresponds to two pressure strip members, which abut against the shoulders on both sides of the battery cell assembly, and multiple pads are located on the same side of the pressure strip members. Thus, one pressure strip member only needs to be aligned with the shoulder on one side of a battery cell assembly, improving assembly flexibility.

[0016] In some embodiments of this application, the ends of the pressure strip components are welded to the corresponding box beams or structural beams to improve assembly efficiency. Alternatively, the ends of the pressure strip components are locked to the corresponding box beams or structural beams by bolts, which not only ensures the stability of the connection but also provides high connection efficiency.

[0017] In some embodiments of this application, the electrode pads are welded to the corresponding electrode terminals to improve assembly efficiency. Alternatively, the electrode pads and corresponding electrode terminals are locked together by bolts, which not only ensures connection stability but also provides high connection efficiency.

[0018] In some embodiments of this application, the pressure strip component is a part made of insulating material, which can ensure the insulation between the strip and the pressure strip component.

[0019] In some embodiments of this application, the pressure strip component includes a metal rod and an insulating layer, with the insulating layer wrapping around the metal rod. The metal rod ensures the overall mechanical strength of the pressure strip component, improves its resistance to bending, and reduces the possibility of the pressure strip component warping due to the span distance. The insulating layer ensures the insulation between the strip and the pressure strip component.

[0020] In some embodiments of this application, multiple tabs are bonded and fixed to each pressure strip member, thereby simplifying the structure of the pressure strip assembly.

[0021] In some embodiments of this application, at least a portion of each pad is pre-embedded in the pressure strip member, such that the pad is securely and reliably connected to the pressure strip member.

[0022] In some embodiments of this application, multiple tabs are located on the side of the pressure strip member facing the battery cell, thereby improving the space utilization inside the battery device. Alternatively, multiple tabs are located on the side of the pressure strip member away from the battery cell, so that while the pressure strip member presses against the shoulder of the battery cell, it also presses the tabs firmly against the shoulder of the battery cell, thereby making the connection between the tabs and the electrode terminals more stable and reliable.

[0023] In some embodiments of this application, the battery device further includes a cover that covers the main body of the battery, and electrode terminals are located on the top wall of the battery cell facing the cover.

[0024] According to a second aspect of the embodiments of this application, an energy storage device is provided. The energy storage device includes a battery device as described above, the battery device being used to store or provide electrical energy.

[0025] According to a third aspect of the embodiments of this application, an electrical device is provided. The electrical device includes an electrical load; and the electrical device further includes a battery device as described above, with the electrical load electrically connected to the battery device; or, the electrical device further includes an energy storage device as described above, with the electrical load electrically connected to the energy storage device. Attached Figure Description

[0026] To more clearly illustrate the technical solutions in the embodiments of this application, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0027] Figure 1 This is a schematic diagram of the structure of a single battery cell in the battery device of this application embodiment;

[0028] Figure 2 This is an exploded view of a battery device according to an embodiment of this application;

[0029] Figure 3 This is an exploded view of another battery device according to an embodiment of this application;

[0030] Figure 4 for Figure 3 The diagram shows the assembly structure of multiple battery cells, multiple pressure strip assemblies, and two structural beams in the battery device.

[0031] Figure 5 for Figure 4 Enlarged view of point A in the middle;

[0032] Figure 6 for Figure 4 A top-down view;

[0033] Figure 7 for Figure 4 A schematic diagram of the decomposition process;

[0034] Figure 8 This is an exploded view of another battery device according to an embodiment of this application;

[0035] Figure 9 This is a schematic diagram of the structure of a pressure strip assembly used in the battery device according to an embodiment of this application;

[0036] Figure 10 for Figure 9 A cross-sectional view along the BB direction;

[0037] Figure 11 for Figure 9 Rear view diagram;

[0038] Figure 12 for Figure 9 Another sectional view in the BB direction;

[0039] Figure 13 for Figure 9 Another sectional view in the BB direction;

[0040] Figure 14 This is a schematic diagram of another pressure strip assembly used in the battery device according to an embodiment of this application;

[0041] Figure 15 for Figure 14 Rear view diagram;

[0042] Figure 16 for Figure 14 A cross-sectional view along the CC direction;

[0043] Figure 17 This is a schematic diagram of the structure of an energy storage device according to an embodiment of this application;

[0044] Figure 18 This is a schematic diagram of the structure of an electrical device according to an embodiment of this application.

[0045] The figures in the diagram are labeled as follows:

[0046] 100. Battery cell; 110. Battery cell assembly; 101. Electrode terminal; 102. Top wall; 103. Shoulder;

[0047] 10. Pressure strip assembly; 11. Pressure strip component; 111. Metal rod; 112. Insulation layer; 12. Bar plate;

[0048] 200. Battery assembly; 201. Box body; 202. Box cover; 203. Assembly space; 204. Base plate; 205. Box beam; 206. Structural beam;

[0049] 300. Energy storage device; 301. Cabinet;

[0050] 400. Electrical equipment; 410. Electrical load; 420. Control device; 430. Chassis; 440. Wheel. Detailed Implementation

[0051] The embodiments of this application are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain this application, and should not be construed as limiting this application.

[0052] In the description of this application, it should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0053] Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first," "second," etc., may explicitly or implicitly include one or more of that feature. In the description of this application, "a plurality of" means two or more, unless otherwise explicitly specified.

[0054] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction 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.

[0055] Currently, judging from market trends, the application of battery devices is becoming increasingly widespread. Battery devices are not only used in energy storage power systems such as hydropower, thermal power, wind power, and solar power plants (battery devices used in these applications are generally referred to as energy storage batteries), but also widely used in electric vehicles such as electric bicycles, electric motorcycles, and electric cars, as well as in military equipment and aerospace (battery devices used in these applications are generally referred to as power batteries). With the continuous expansion of battery device applications, the market demand is also constantly increasing. Therefore, the continuous increase in market demand requires a corresponding increase in production capacity, and improving production efficiency is one of the quantifiable indicators for increasing production capacity.

[0056] Current battery assembly includes a battery housing, multiple battery cells, multiple contact plates, and multiple pressure strips. When placing the battery cells into the battery housing and assembling the contact plates and pressure strips, the contact plates are first connected to the electrode terminals of the battery cells. Then, the pressure strips are placed on the shoulders of the battery cells, and both ends of the pressure strips are connected to the battery housing, thus pressing the battery cells firmly against the housing. In related technologies, multiple contact plates need to be connected one by one to the electrode terminals of the corresponding battery cells, resulting in low assembly efficiency and affecting the overall assembly efficiency of the battery assembly. Furthermore, the pressure strips have a certain span when pressing against the shoulders of the multiple battery cells, and since only both ends of the pressure strips are connected and fixed to the battery housing, the pressure strips may tilt, causing insufficient pressure on the battery cells and resulting in looseness and wobbling of the battery cells relative to the battery housing.

[0057] Based on the above considerations, embodiments of this application provide a battery device, and provide an energy storage device, energy storage system, charging grid, and electrical equipment assembled using this battery device. The battery device provided in this application includes multiple pressure strip assemblies, each pressure strip assembly including a pressure strip member and multiple electrodes. The multiple electrodes are fixedly connected to the pressure strip member, and the pressure strip member is insulated from the electrodes. Any two adjacent electrodes are insulated from each other. After assembling multiple battery cells into the assembly space of the housing body, the various pressure strip assemblies are assembled as a whole. That is, the electrodes are electrically connected to the electrode terminals to allow the multiple battery cells to be connected in series, parallel, or mixed. The two ends of the pressure strip member are respectively connected to corresponding positions on the housing body, and each pressure strip member simultaneously abuts against the shoulders of multiple battery cells. In this way, when placing each pressure strip assembly, one pressure strip component and multiple battery pads can be placed simultaneously. Then, each battery pad is connected to the electrode terminal of the corresponding battery cell, and both ends of the pressure strip component are connected to the corresponding positions on the battery box body. Compared with the related technology of placing and connecting the battery pads one by one, and then placing the pressure strip and connecting it to the battery box body, the embodiment of this application uses a pressure strip assembly for assembly, which can significantly improve the connection and assembly efficiency.

[0058] Furthermore, since the pressure strip assembly is an integral structure in which multiple pads are fixedly connected to the pressure strip member, when the multiple pads on the pressure strip member are all connected to the electrode terminals of the corresponding battery cells and both ends of the pressure strip member are connected to the corresponding positions of the main body of the box, the multiple pads have a connecting and pulling effect on the pressure strip member, preventing the pressure strip member from tilting due to the span distance. Thus, the pressure strip member can reliably and stably press the corresponding multiple battery cells against the main body of the box, preventing the battery cells from becoming loose or shaking relative to the main body of the box due to insufficient pressing by the pressure strip member.

[0059] To illustrate the technical solutions provided by the embodiments of this application, the following detailed description is provided in conjunction with specific drawings and embodiments.

[0060] According to a first aspect of the embodiments of this application, embodiments of this application provide a battery device 200. For example... Figure 2 , Figure 3 and Figure 8 As shown, the battery device 200 includes a housing body 201, multiple battery cells 100, and multiple retaining strip assemblies 10. The housing body 201 forms an assembly space 203, and the multiple battery cells 100 are disposed within the assembly space 203, as shown. Figure 1 As shown, the battery cell 100 includes electrode terminals 101. Figures 2 to 9 , Figure 11 , Figure 14 and Figure 15 As shown, each pressure strip assembly 10 includes a pressure strip member 11 and a plurality of tabs 12. The plurality of tabs 12 are fixedly connected to the pressure strip member 11, and the pressure strip member 11 and the tabs 12 are insulated from each other. In this battery device 200, any two adjacent tabs 12 are insulated from each other, and the tabs 12 are electrically connected to the electrode terminals 101 to enable the plurality of battery cells 100 to be connected in series, in parallel, or in a mixed configuration. Furthermore, the two ends of the pressure strip member 11 are respectively connected to corresponding positions on the housing body 201, and each pressure strip member 11 simultaneously abuts against the shoulder 103 of the plurality of battery cells 100.

[0061] During the assembly of the battery device 200, after multiple battery cells 100 are assembled into the assembly space 203 of the main body 201, the various pressure strip components 10 are assembled as a whole. That is, the bar plate 12 is electrically connected to the electrode terminal 101 of the corresponding battery cell 100 so that the multiple battery cells 100 are connected in series, in parallel or in combination. The two ends of the pressure strip component 11 are respectively connected to the corresponding positions of the main body 201, and each pressure strip component 11 simultaneously abuts against the shoulder 103 of multiple battery cells 100. Thus, when placing each pressure strip assembly 10, a pressure strip member 11 and multiple battery pads 12 can be placed simultaneously. Then, each battery pad 12 is connected to the electrode terminal 101 of the corresponding battery cell 100, and both ends of the pressure strip member 11 are connected to the corresponding positions of the housing body 201. Compared with the related technology of placing and connecting the battery pads one by one, and then placing the pressure strip and connecting it to the battery housing, the battery device 200 provided in this application can significantly improve the connection and assembly efficiency by using the pressure strip assembly 10 for overall assembly.

[0062] Furthermore, since the pressure strip assembly 10 is an integral structure in which multiple pads 12 are fixedly connected to the pressure strip member 11, when the multiple pads 12 on the pressure strip member 11 are all connected to the electrode terminals 101 of the corresponding battery cells 100 and both ends of the pressure strip member 11 are connected to the corresponding positions of the box body 201, the multiple pads 12 have a connecting and pulling effect on the pressure strip member 11. Combined with the fact that both ends of the pressure strip member 11 are connected to the corresponding positions of the box body 201, the two ends of the pressure strip member 11 are prevented from tilting up or tilting up due to the span distance. Thus, the pressure strip member 11 can reliably and stably press the corresponding multiple battery cells 100 against the bottom plate 204 of the box body 201, preventing the battery cells 100 from becoming loose or shaking relative to the box body 201 due to the pressure strip member 11 not pressing them in place.

[0063] In embodiments of this application, the battery device 200 further includes a cover 202, which covers the main body 201 to seal the assembly space 203. The electrode terminals 101 are located on the top wall 102 of the battery cell 100 facing the cover 202, which is referred to as the positive assembly method of the battery cell 100.

[0064] The battery cell 100 can be a rechargeable battery, meaning a battery cell 100 that can be recharged after discharge to activate its active materials and continue to be used. The battery cell 100 can be a lithium-ion battery, sodium-ion battery, sodium-lithium-ion battery, lithium metal battery, sodium metal battery, lithium-sulfur battery, magnesium-ion battery, nickel-metal hydride battery, nickel-cadmium battery, lead-acid battery, etc., and this application embodiment is not limited to this. Furthermore, as... Figure 1 As shown, the battery cell 100 provided in this embodiment is a square cell, also known as a square battery. The square battery cell 100 has two large sidewalls with larger surface areas, two small sidewalls with smaller surface areas, a bottom wall, and a top wall 102, as shown... Figure 1 As shown. Two large sidewalls and two small sidewalls are alternately connected to form prism-shaped sidewalls, with the bottom wall and top wall 102 located at the upper and lower ends of the prism-shaped sidewalls, respectively. Generally, in a square unit, the top wall 102 is provided with structures such as a pressure relief mechanism and electrode terminals 101, making it relatively easy to identify the top wall 102. The wall opposite to the top wall 102 is the bottom wall. The two large sidewalls and two small sidewalls can be directly distinguished by the size of their surface areas.

[0065] In other embodiments of this application, such as Figures 1 to 3 , Figure 8 As shown, the electrode terminal 101 can also be located on the side of the battery cell 100 away from the cover 202. This side can be the top wall 102 or the bottom wall. This is called the reverse assembly method of the battery cell 100.

[0066] In the embodiments of this application, the sheet 12 includes, but is not limited to, a metal sheet made of copper, copper alloy, aluminum, or aluminum alloy.

[0067] Of course, in some other embodiments of the battery device 200 of this application, the battery cell 100 may also be a cylindrical cell, and the battery cell 100 is a cylindrical cell with an electrode at one end, that is, the positive electrode terminal and the negative electrode terminal of the battery cell 100 are both disposed on the same end of the cylindrical cell.

[0068] The following embodiments of this application use a square battery cell 100 and a forward assembly method as examples for illustration. Cylindrical cells and inverted assembly methods can be implemented with reference to the square battery cell 100 and the forward assembly method. In the forward assembly method, the shoulder 103 is actually a partial location of the top wall 102.

[0069] In some embodiments of this application, the multiple battery cells 100 within the assembly space 203 may be staggered. Specifically, taking one battery cell 100 as a reference, along the width direction of the reference battery cell 100, the reference battery cell 100 corresponds to two other adjacent battery cells 100, and one electrode terminal 101 of the reference battery cell 100 is directly opposite to one electrode terminal 101 of one of the other two battery cells 100, and the other electrode terminal 101 of the reference battery cell 100 is directly opposite to one electrode terminal 101 of the other two battery cells 100. In this case, the pressure relief mechanism and the electrode terminal 101 of the battery cell 100 are respectively disposed on different shell walls. For example, the electrode terminal 101 is disposed on the top wall 102, and the pressure relief mechanism is disposed on the bottom wall. This prevents the pressure strip member 11 from blocking the operation of the pressure relief mechanism when it abuts against the top wall 102.

[0070] In the embodiments of this application, multiple battery cells 100 are stacked sequentially to form a battery cell assembly 110. That is, between two adjacent battery cells 100 in a battery cell assembly 110, a large sidewall of one battery cell 100 is abutted against a large sidewall of another battery cell 100. Multiple battery cells 100 are stacked in this manner to form a battery cell assembly 110. The multiple battery cell assemblies 110 are arranged in a rectangular array within the assembly space 203.

[0071] The battery device 200, assembled from square battery cells 100, also has a corresponding square shape. For example... Figure 2As shown, in some embodiments of this application, the main body 201 includes a base plate 204 and four box beams 205. The box beams 205 can be profile beams with internal cavities and reinforcing ribs, giving the profile beams themselves high mechanical strength. That is, the main body 201 itself has high mechanical strength, which is sufficient to meet the strength requirements of the battery device 200 in assembly and use. Furthermore, the four box beams 205 are connected end-to-end to the base plate 204 to form a rectangular assembly space 203. For smaller battery devices 200, the overall volume of the battery device 200 is not large. In this case, the two ends of the pressure strip member 11 are directly connected to two opposite and parallel box beams 205, thereby locking the two ends of the pressure strip member 11. The extension direction of the pressure strip member 11 is perpendicular to the extension direction of the box beam 205 to which it is connected. Thus, since the mechanical strength of the main body 201 is sufficient, it is possible to save on reinforcing structures or components such as reinforcing ribs, crossbeams or longitudinal beams. This not only simplifies the design structure of the main body 201, but also reduces the materials used in the main body 201 and reduces its weight, which helps to reduce the overall weight of the battery device 200 and achieve lightweighting.

[0072] In some embodiments of the smaller battery device 200 of this application, the box beam 205 can also be a side beam. Since the four wall panels of the box body 201 are all single-layer thin walls (at this time, the four wall panels are connected end to end to the bottom plate 204 to form a rectangular assembly space 203), the mechanical strength of the single-layer thin wall panels is insufficient. Therefore, the four box beams 205 are arranged one-to-one on the inner wall of the four wall panels to enhance the mechanical strength of the single-layer thin wall panels, thereby helping to enhance the overall mechanical strength of the box body 201, so that the overall mechanical strength of the box body 201 can meet the strength requirements of the battery device 200 in assembly, use, etc.

[0073] In the embodiments of this application, the box girder 205 is preferably made of profile beam plate.

[0074] In some embodiments of the smaller battery device 200 of this application, such as Figures 3 to 7As shown, the main body 201 also includes a structural beam 206, with both ends of the structural beam 206 connected to two opposing box beams 205. The structural beam 206 further enhances the overall mechanical strength of the main body 201, ensuring that its overall mechanical strength meets the strength requirements of the battery device 200 in assembly and use. Furthermore, in this battery device 200, the extension direction of the structural beam 206 is parallel to the extension directions of the other two opposing box beams 205 and is located between these two box beams 205. In this case, the structural beam 206 divides the assembly space 203 into two sub-spaces: one for accommodating the battery cell 100 and the other for accommodating the high-voltage box. One end of the pressure strip member 11 is connected to the structural beam 206, and the other end is connected to the corresponding box beam 205. The extension direction of the pressure strip member 11 is perpendicular to the extension direction of the structural beam 206. Since a structural beam 206 is provided between the two opposing box beams 205, it can provide a connection position for the end of the pressure strip member 11. The pressure strip member 11 does not need to use a long dimension, thereby improving the bending resistance of the pressure strip member 11 and improving the abutment capability of the pressure strip member 11 against the shoulder 103 of the battery cell 100.

[0075] In other embodiments of the larger battery device 200 of this application, such as Figure 8As shown, the main body 201 also includes multiple structural beams 206 (two or more structural beams 206). These structural beams 206 are spaced apart and arranged in parallel. The two ends of each structural beam 206 are connected to two opposing box beams 205. These multiple structural beams 206 further enhance the overall mechanical strength of the main body 201, ensuring that its overall mechanical strength meets the strength requirements of the battery device 200 in assembly and use. At this time, one box beam 205 and its adjacent structural beam 206 together define a subspace in the assembly space 203 for accommodating the high-voltage box. The remaining space in the assembly space 203 is used to accommodate the battery cells 100. When the battery cell 100 is placed into the assembly space 203, multiple battery cell assemblies 110 are arranged side-by-side between adjacent structural beams 206. The extending direction of the structural beams 206 is perpendicular to the stacking direction of the multiple battery cells 100 in the battery cell assembly 110. Along a direction perpendicular to the extension direction of the structural beam 206 (i.e., along the stacking arrangement direction of the multiple battery cells 100 in the battery cell assembly 110), one end of a portion of the pressure strip member 11 is connected to the box beam 205, and the other end is connected to the structural beam 206 adjacent to the box beam 205 to which it is connected; the two ends of another portion of the pressure strip member 11 are respectively connected to two adjacent structural beams 206. The extension direction of the pressure strip member 11 is perpendicular to the extension direction of the structural beam 206. In the battery device 200 of this embodiment, although the overall volume of the battery device 200 is larger, because multiple spaced and parallel structural beams 206 are provided to provide connection positions for the ends of the pressure strip member 11, the pressure strip member 11 does not need to use a longer dimension, thereby improving the bending resistance of the pressure strip member 11 and improving the abutment capability of the pressure strip member 11 against the shoulder 103 of the battery cell 100.

[0076] The structural beam 206, also commonly known as the expansion beam, not only enhances the overall mechanical strength of the main body 201 but also positions and secures the battery cell assembly 110. Furthermore, when the battery device 200 is subjected to external impact, the structural beam 206 can absorb and offset this impact to a certain extent, thus preventing further impact on the battery cell 100 and protecting its structural integrity. In the embodiments of this application, the extension direction of the structural beam 206 is parallel to the length direction of the battery cell 100, perpendicular to the width direction of the battery cell 100, and perpendicular to the extension direction of the pressure strip member 11. The direction perpendicular to the top wall 102 of the battery cell 100 is the height direction of the battery cell 100.

[0077] In some embodiments of this application, the end of the pressure strip member 11 is welded to the corresponding box beam 205 or structural beam 206. The welding process includes, but is not limited to, using laser welding, arc welding, or other techniques to weld the end of the pressure strip member 11 to the corresponding box beam 205 or structural beam 206. Comparatively, the embodiments of this application preferentially employ laser welding to weld the end of the pressure strip member 11 to the corresponding box beam 205 or structural beam 206, thereby better achieving automated and intelligent production and improving assembly efficiency.

[0078] In some other embodiments of this application, the end of the pressure strip member 11 is locked to the corresponding box beam 205 or structural beam 206 by bolts. Locking the end of the pressure strip member 11 to the corresponding box beam 205 or structural beam 206 by bolts not only ensures connection stability but also provides high connection efficiency. Furthermore, when maintenance or replacement of a faulty battery cell 100 is required in the battery device 200, the bolts can be removed to facilitate maintenance or replacement of the faulty battery cell 100. After maintenance or replacement of the battery cell 100 is completed, the end of the pressure strip member 11 can be re-locked to the corresponding box beam 205 or structural beam 206 by bolts.

[0079] like Figure 2 , Figure 3 , Figure 4 , Figures 6 to 8 As shown, in the battery device 200 of this application, since multiple battery cell assemblies 110 are arranged in a rectangular array within the assembly space 203, the pressure strip member 11 is straight. Along the extending direction of the pressure strip member 11, one pressure strip member 11 abuts against the shoulder 103 on each side of each battery cell assembly 110. Since each battery cell assembly 110 is simultaneously abutted by two pressure strip members 11, and multiple tabs 12 have a connecting and pulling effect on the pressure strip member 11, the pressure strip member 11 can reliably and stably press the corresponding multiple battery cells 100 against the bottom plate 204 of the box body 201, preventing the battery cells 100 from becoming loose or shaking relative to the box body 201.

[0080] like Figures 4 to 8 As shown, in some embodiments of this application, a pressure strip member 11 is provided between two adjacent battery cell assemblies 110, and the shoulders 103 facing each other between two adjacent battery cell assemblies 110 are simultaneously abutted by the pressure strip member 11, and, as Figures 14 to 16As shown, in the width direction perpendicular to the extension direction of the pressure strip member 11, multiple tabs 12 are symmetrically arranged in two rows relative to the pressure strip member 11. This reduces the number of pressure strip members 11, thereby helping to reduce the overall weight of the battery device 200 and achieve weight reduction. After the pressure strip assembly 10 is assembled, the multiple tabs 12 have a connecting and pulling effect on both sides of the pressure strip member 11, so that the pressure strip member 11 can reliably and stably press the corresponding multiple battery cells 100 against the bottom plate 204 of the box body 201, preventing the battery cells 100 from loosening or shaking relative to the box body 201. In this embodiment, along the extension direction of the pressure strip member 11, the shoulder 103 and electrode terminal 101 of a battery cell assembly 110 adjacent to the box beam 205 are arranged as follows: Figures 9 to 13 The pressure strip assembly 10 shown is adapted for assembly to avoid the presence of invalid pads 12, thereby further reducing the overall weight of the battery device 200 and achieving lightweighting.

[0081] In other embodiments of this application, along the extending direction of the retaining strip member 11, each battery cell assembly 110 corresponds to two retaining strip members 11, and these two retaining strip members 11 respectively abut against the shoulders 103 on both sides of the battery cell assembly 110. In this embodiment, the retaining strip assemblies 10 used in the battery device 200 are all as follows: Figures 9 to 13 The pressure strip assembly 10 shown is adapted for assembly, that is, in each pressure strip assembly 10, multiple pads 12 are located on the same side of the pressure strip member 11. In this way, one pressure strip member 11 only needs to be aligned with the shoulder 103 on one side of one battery cell assembly 110, improving assembly flexibility.

[0082] In some embodiments of this application, the electrode plate 12 is welded to the corresponding electrode terminal 101. The welding process includes, but is not limited to, using laser welding, arc welding, or other methods to weld the electrode plate 12 to the corresponding electrode terminal 101. Comparatively, the embodiments of this application preferentially use laser welding to weld the electrode plate 12 to the corresponding electrode terminal 101, thereby better achieving automated and intelligent production and improving assembly efficiency.

[0083] In some other embodiments of this application, the electrode plate 12 and the corresponding electrode terminal 101 are locked together by bolts. Locking the electrode plate 12 and the corresponding electrode terminal 101 together with bolts not only ensures connection stability but also provides high connection efficiency. Furthermore, when it is necessary to maintain or replace a faulty battery cell 100 in the battery device 200, the bolts can be removed to facilitate maintenance or replacement of the faulty battery cell 100, and after maintenance or replacement of the battery cell 100, the electrode plate 12 and the corresponding electrode terminal 101 can be relocked together with the bolts.

[0084] In the embodiments of this application, the pressure strip member 11 is a component made of insulating material. In this way, when multiple strips 12 are connected and fixed to the pressure strip member 11, the insulation between the strips 12 and the pressure strip member 11 can be guaranteed.

[0085] like Figure 13 As shown, in some embodiments of this application, the pressure strip member 11 includes a metal rod 111 and an insulating layer 112, with the insulating layer 112 wrapping around the metal rod 111. That is, the pressure strip member 11 in this embodiment is a structural component formed by combining the metal rod 111 and the insulating layer 112. The metal rod 111 ensures the overall mechanical strength of the pressure strip member 11, improves its resistance to bending, and reduces the possibility of the pressure strip member 11 warping due to span distance. Figure 13 As shown, the insulating layer 112 that wraps around the metal rod 111 is connected to the bar sheet 12 to ensure the insulation between the bar sheet 12 and the pressure strip member 11.

[0086] In some embodiments of this application, such as Figure 10 , Figure 13 and Figure 16 As shown, multiple tabs 12 are bonded and fixed to each pressure strip member 11. This simplifies the structure of the pressure strip assembly 10, thereby improving the manufacturing efficiency of the pressure strip assembly 10.

[0087] In some embodiments of this application, such as Figure 12 As shown, at least a portion of each tab 12 is pre-embedded in each pressure strip member 11, ensuring a firm and reliable connection between the tab 12 and the pressure strip member 11. In this embodiment, when the pressure strip member 11 is made of insulating material, the tab 12 is first placed into the mold cavity and fixed using a suitable mold. Then, molten insulating material is poured, filling the cavity to form the shape of the pressure strip member 11 and wrapping at least a portion of the tab 12. After the molten insulating material cools and solidifies, it can be demolded to obtain the overall pressure strip assembly 10. When the pressure strip member 11 includes a metal rod 111 and an insulating layer 112, the tab 12 and the metal rod 111 are first placed into the mold cavity and fixed using a suitable mold. Then, molten insulating material is poured, filling the cavity and wrapping the metal rod 111 and at least a portion of the tab 12. After the molten insulating material cools and solidifies, it can be demolded to obtain the overall pressure strip assembly 10.

[0088] Since the electrode terminals 101 of the battery cell 100 protrude from the top wall 102, there is a gap between the tab 12 connected to the top of the electrode terminal 101 and the top wall 102. To fully utilize the gap between the tab 12 and the top wall 102 and improve the internal space utilization of the battery device 200, in some embodiments of this application, such as... Figures 4 to 7 As shown, on each retaining strip member 11, multiple tabs 12 are located on the side of the retaining strip member 11 facing away from the battery cell 100. Thus, the retaining strip member 11 is accommodated in the gap between the tab 12 and the top wall 102, and the retaining strip member 11 directly abuts against the shoulder 103 of the battery cell 100, effectively improving the space utilization rate inside the battery device 200. Furthermore, the retaining strip member 11 directly abuts against the shoulder 103 of the battery cell 100, ensuring that the retaining strip member 11 can reliably and stably press the corresponding multiple battery cells 100 against the bottom plate 204 of the main body 201, preventing the battery cells 100 from loosening or shaking relative to the main body 201.

[0089] In other embodiments of this application, multiple tabs 12 are located on the side of the pressure strip member 11 facing the battery cell 100. Thus, while the pressure strip member 11 presses against the shoulder 103 of the battery cell 100, it also presses the tabs 12 firmly against the shoulder 103 of the battery cell 100, thereby making the connection between the tabs 12 and the electrode terminals 101 more stable and reliable. When the pressure strip assembly 10 is assembled and the cover 202 is closed onto the body 201, there is a gap between the inner wall of the cover 202 and the pressure strip member 11. This gap allows for insulation between the cover 202 and the battery cell 100, or an insulating layer (such as insulating foam) can be provided in this gap to achieve insulation between the cover 202 and the battery cell 100.

[0090] In some embodiments of this application, on each pressure strip member 11, a portion of the plurality of tabs 12 are located on the side of the pressure strip member 11 facing the battery cell 100, and another portion is located on the side of the pressure strip member 11 away from the battery cell 100. In this embodiment, based on the distribution of the battery cells 100 and other components inside the battery device 200, corresponding tabs 12 are arranged on the side of the pressure strip member 11 facing the battery cell 100, so that the pressure strip member 11 presses the tabs 12 against the shoulder 103 of the battery cell 100. On the side of the pressure strip member 11 away from the battery cell 100, corresponding tabs 12 are arranged to avoid interference between the tabs 12 and other components on the top wall 102 of the battery cell 100.

[0091] According to a second aspect of the embodiments of this application, embodiments of this application also provide an energy storage device 300. In some embodiments of this application, the energy storage device 300 includes a battery device 200 as described above, that is, the energy storage device 300 uses one battery device 200 or multiple battery devices 200 connected in series, parallel or mixed, so that these battery devices 200 are used to store electrical energy or provide electrical energy.

[0092] The energy storage device 300 can be a small, portable device, such as a convenient energy storage battery used for outdoor tourism and camping, or a portable energy storage battery used by street vendors. The energy storage device 300 can also be a large, fixed, high-power industrial-grade device, such as a large energy storage power station used in a power plant. The energy storage device 300 can be used in energy storage power stations, wind power generation systems, solar power generation systems, mobile power systems, or temporary power supply systems. The energy storage device 300 can store electrical energy as needed and output it when appropriate. For example, the energy storage device 300 can store electrical energy during off-peak hours and provide power to relevant users or electrical equipment during peak hours. Other examples include independent power supply energy storage cabinets or energy storage containers used on construction sites or in factories, and larger, portable energy storage cabinets or energy storage containers used at large event venues.

[0093] like Figure 17 As shown, the energy storage device 300 provided in the embodiments of this application is preferably an energy storage cabinet, which includes a cabinet 301 and a plurality of battery devices 200, which are stacked and assembled in the cabinet 301.

[0094] In some embodiments of this application, the energy storage device 300 may 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.

[0095] As an example, the thermal management module may include a liquid cooling unit that supplies coolant to each battery device 200 via pipelines for regulating the temperature of the individual battery cells 100.

[0096] As an example, the main control module can serve as a battery management unit for multiple battery devices 200, used to monitor and manage these devices. The main control module can monitor information such as current, voltage, power, or temperature of the multiple battery devices 200. For example, it can control the charging and discharging current and voltage of the multiple battery devices 200. The main control module includes modules such as an auxiliary battery management unit (SBMU) and a fusion switch.

[0097] As an example, the central control module can serve as the battery management unit of the energy storage device 300, used to monitor and manage the energy storage device 300. The central control module can monitor information such as the current, voltage, power, state of charge, or temperature of the energy storage device 300. For example, it can control the charging and discharging current and voltage of the energy storage device 300. 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.

[0098] As an example, the fire protection module includes a control panel, detectors, alarm devices, etc., used to detect, alarm, or extinguish fires in the energy storage system.

[0099] As an example, the power distribution module can be used to distribute power to the modules in the energy storage device 300 that require electricity.

[0100] According to a third aspect of the embodiments of this application, embodiments of this application also provide an energy storage system. The energy storage system includes a power conversion device and an energy storage device 300 as described above. The power conversion device is electrically connected between a power generation device and the energy storage device 300, wherein a battery device 200 in the energy storage device 300 is used to store electrical energy or provide electrical energy.

[0101] Furthermore, the energy storage system may include one or more power conversion systems (PCS). The power generation equipment generates electrical energy, which can be stored in the energy storage device (or battery device 200) through the power conversion device. For example, the power generation equipment may specifically be a solar panel, hydroelectric power generation equipment, thermal power generation equipment, wind power generation equipment, etc. The specific type of power generation equipment is not limited in this application.

[0102] According to a fourth aspect of the embodiments of this application, embodiments of this application also provide a charging grid, including charging piles.

[0103] In some embodiments of this application, the charging grid further includes an energy storage system as described above, and the charging pile is electrically connected to the energy storage system. The battery device 200 of the energy storage device 300 of the energy storage system is used to store electrical energy, or the battery device 200 of the energy storage device 300 is used to provide electrical energy to the charging pile.

[0104] In some other embodiments of this application, the charging grid further includes an energy storage device 300 as described above, and the charging pile is electrically connected to the energy storage device 300, wherein the battery device 200 of the energy storage device 300 is used to store electrical energy, or the battery device 200 of the energy storage device 300 is used to provide electrical energy to the charging pile.

[0105] The charging pile may have one or more connectors, which are used to connect to the charging interface of the device to be charged (such as an electric vehicle), so as to replenish the energy storage unit (such as the battery of the electric vehicle) of the device to be charged.

[0106] According to a fifth aspect of the embodiments of this application, embodiments of this application also provide an electrical appliance 400, which includes an electrical load 410.

[0107] Electrical equipment 400 includes, but is not limited to, electric toys, power tools, electric vehicles, electric cars, ships, and spacecraft. Electric toys may include, but are not limited to, stationary or mobile electric toys, such as game consoles, electric car toys, electric ship toys, and electric airplane toys. Spacecraft may include, but are not limited to, airplanes, rockets, space shuttles, and spacecraft.

[0108] In some embodiments of this application, the electrical device 400 further includes an energy storage system as described above. The electrical load 410 is electrically connected to the energy storage system. The battery device 200 of the energy storage device 300 of the energy storage system is used to store electrical energy, or the battery device 200 of the energy storage device 300 is used to provide electrical energy to the electrical load 410, thereby enabling the electrical load 410 to operate normally.

[0109] Alternatively, in some other embodiments of this application, the electrical device 400 further includes an energy storage device 300 as described above. That is, the electrical device 400 employs one energy storage device 300 or multiple energy storage devices 300 connected in series, parallel, or mixed connection, and the electrical load 410 is electrically connected to the energy storage device 300. The battery device 200 of the energy storage device 300 is used to store electrical energy, or the battery device 200 of the energy storage device 300 is used to provide electrical energy to the electrical load 410, thereby enabling the electrical load 410 to operate normally.

[0110] Alternatively, in some other embodiments of this application, the electrical device 400 further includes a battery device 200 as described above. That is, the electrical device 400 uses one battery device 200 or multiple battery devices 200 connected in series, parallel, or mixed connection, and the electrical load 410 is electrically connected to the battery device 200. The battery device 200 is used to store electrical energy, or the battery device 200 is used to provide electrical energy to the electrical load 410, thereby enabling the electrical load 410 to operate normally.

[0111] Among them, the electrical equipment 400 is an electric vehicle, and it is assembled using a battery device 200, such as Figure 18 As shown, the battery device 200 is mounted on the frame 430 of an electric vehicle. The electric vehicle includes the frame 430, a drive motor, and wheels 440. The battery device 200 and the drive motor are both fixedly mounted on the frame 430, and the wheels 440 are rotatably connected to the frame 430. The battery device 200 is electrically connected to the drive motor, and the drive motor is driven by the wheels 440. Using the battery device 200 provided in this application as the drive motor (the drive motor is one of the electrical loads 410 of the electrical equipment 400), the drive motor drives the wheels 440 to rotate, enabling the electric vehicle to drive normally. Furthermore, the electric vehicle includes a control device 420, which is mounted on the frame 430 and electrically connected to the battery device 200. The control device 420 is used to control and monitor the charging and discharging status of the battery device 200. In some electric vehicles, the battery housing of the battery device 200 can be part of the chassis structure of the electric vehicle. For example, a portion of the battery box can be at least part of the floor of the electric vehicle, or a portion of the battery box can be at least part of the crossbeams and longitudinal beams of the electric vehicle.

[0112] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A battery device, characterized in that, include: The main body of the box forms an assembly space; Multiple battery cells are disposed within the assembly space, and each battery cell includes electrode terminals; Multiple pressure strip assemblies, each pressure strip assembly including a pressure strip member and multiple tabs, the multiple tabs being fixedly and insulatedly connected to the pressure strip member, any two adjacent tabs being insulated from each other, the tabs being electrically connected to the electrode terminals to enable the multiple battery cells to be connected in series, in parallel or in mixed connections, the two ends of the pressure strip member being respectively connected to the main body of the housing, and each pressure strip member simultaneously abutting against the shoulder of the multiple battery cells.

2. The battery device according to claim 1, characterized in that, The main body of the box includes a base plate and four box beams. The four box beams are connected end to end to the base plate to form the assembly space. The two ends of the pressure strip member are respectively connected to two opposite and parallel box beams. The extension direction of the pressure strip member is perpendicular to the extension direction of the box beams.

3. The battery device according to claim 1, characterized in that, The main body of the box includes a base plate, four box beams and a structural beam. The four box beams are connected end to end to the base plate to form the assembly space. The two ends of the structural beam are respectively connected to two opposite box beams, and the extension direction of the structural beam is parallel to the extension direction of the other two opposite box beams. One end of the pressure strip member is connected to the structural beam, and the other end is connected to the corresponding box beam. The extension direction of the pressure strip member is perpendicular to the extension direction of the structural beam.

4. The battery device according to claim 1, characterized in that, The main body of the box includes a bottom plate, four box beams and multiple structural beams. The four box beams are connected end to end to the bottom plate to form the assembly space. The multiple structural beams are spaced apart and arranged in parallel. The two ends of each structural beam are respectively connected to two opposite box beams, and the extension direction of the structural beam is parallel to the extension direction of the other two opposite box beams. Along a direction perpendicular to the extension direction of the structural beam, one end of a portion of the pressure strip member is connected to the box beam, and the other end is connected to the structural beam adjacent to the box beam; the two ends of another portion of the pressure strip member are respectively connected to two adjacent structural beams. The extension direction of the pressure strip member is perpendicular to the extension direction of the structural beam.

5. The battery device according to any one of claims 1-4, characterized in that, The pressure strip member is in the shape of a straight strip. Along the extension direction of the pressure strip member, multiple battery cells are stacked in sequence to form a battery cell assembly. The multiple battery cell assemblies are arranged in a rectangular array in the assembly space. The shoulder portion on both sides of each battery cell assembly is abutted by a pressure strip member.

6. The battery device according to claim 5, characterized in that, A pressure strip member is provided between two adjacent battery cell assemblies, and the shoulders of two adjacent battery cell assemblies facing each other simultaneously abut against the pressure strip member. In the width direction perpendicular to the extension direction of the pressure strip member, a plurality of tabs are symmetrically arranged in two rows relative to the pressure strip member.

7. The battery device according to claim 5, characterized in that, Each battery cell assembly corresponds to two pressure strip members, and the two pressure strip members respectively abut against the shoulders on both sides of the battery cell assembly, and the multiple pads are all located on the same side of the pressure strip members.

8. The battery device according to claim 3 or 4, characterized in that, The end of the pressure strip component is welded to the corresponding box beam or structural beam; Alternatively, the end of the pressure strip member is locked to the corresponding box beam or structural beam by bolts.

9. The battery device according to any one of claims 1-4, characterized in that, The electrode plate is welded to the corresponding electrode terminal; Alternatively, the bar plate and the corresponding electrode terminal are locked together by bolts.

10. The battery device according to any one of claims 1-4, characterized in that, The pressure strip component is a part made of insulating material; Alternatively, the pressure strip component includes a metal rod and an insulating layer, the insulating layer being wrapped around the metal rod.

11. The battery device according to claim 10, characterized in that, On each of the pressure strip components, a plurality of the tabs are bonded and fixed to the pressure strip component; Alternatively, at least a portion of each of the tabs may be pre-embedded in the strip member.

12. The battery device according to any one of claims 1-4, characterized in that, On each of the pressure strip members, a plurality of the tabs are located on the side of the pressure strip member facing the battery cell; Alternatively, on each of the pressure strip members, a plurality of the tabs are located on the side of the pressure strip member opposite to the battery cell.

13. The battery device according to any one of claims 1-4, characterized in that, The battery device also includes a cover that covers the main body of the battery, and the electrode terminals are located on the top wall of the battery cell facing the cover.

14. An energy storage device, characterized in that, The energy storage device includes a battery device as described in any one of claims 1-13, the battery device being used to store or provide electrical energy.

15. An electrical appliance, characterized in that, Including electrical loads; The electrical equipment further includes a battery device as described in any one of claims 1-13, wherein the electrical load is electrically connected to the battery device; Alternatively, the electrical equipment may further include the energy storage device as described in claim 14, wherein the electrical load is electrically connected to the energy storage device.

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