Batteries, power-consuming devices, and methods and devices for manufacturing batteries

Abstract

The embodiments of the present application provide a battery, a power consumption device, and a method and device for manufacturing a battery. The battery includes a battery cell group including a plurality of battery cells arranged along a first direction, a housing including a first beam and a second beam spaced apart along the first direction, the battery cell group being disposed between the first beam and the second beam, where at least one of the first beam and the second beam is a clamping beam, a housing having a wedge-shaped gap between the clamping beam and the battery cell group, and a wedge-shaped member for filling the wedge-shaped gap and clamping the battery cell group to the housing. The above technical solution can improve the performance of the battery by improving the rigidity and strength of the battery.

Description

[Technical Field]

[0001] FIELD OF THE INVENTION This application relates to the field of battery technology, and more particularly to batteries, power consuming devices, and methods and apparatus for manufacturing batteries. [Background technology]

[0002] Energy conservation and emission reduction are key to the sustainable development of the automotive industry. In this context, electric vehicles have become an important component of the sustainable development of the automotive industry due to their energy-saving and environmental advantages. For electric vehicles, battery technology is a key factor in their development.

[0003] Batteries are installed in power-consuming devices, such as vehicles. The movement of the power-consuming device, such as a vehicle, can cause a certain amount of impact on the battery. If the battery has low rigidity and strength, the impact can adversely affect the battery's performance and potentially pose a safety risk. Therefore, how to improve the rigidity and strength of batteries has become a technical issue that needs to be addressed urgently in battery technology. Summary of the Invention

[0004] The present application provides a battery, a power consuming device, and a method and apparatus for manufacturing the battery that can improve the performance of the battery by improving the stiffness and strength of the battery.

[0005] According to a first aspect, there is provided a battery, the battery including: a battery cell group including a plurality of battery cells arranged along a first direction; a housing including a first beam and a second beam spaced apart along the first direction, the battery cell group being disposed between the first beam and the second beam, wherein at least one of the first beam and the second beam is a clamping beam; a housing having a wedge-shaped gap between the clamping beam and the battery cell group; and a wedge-shaped member for filling the wedge-shaped gap and clamping the battery cell group to the housing.

[0006] According to the technical solutions of the embodiments of the present application, the battery cell group can be securely and stably fastened to the housing by utilizing the engagement between the wedge-shaped members and the wedge-shaped gaps, and the extrusion interaction force between the battery cells restrains adjacent battery cells, improving the structural stability of the battery, thereby improving the rigidity and strength of the entire battery, and reducing safety risks caused by vibration and impact during battery use.

[0007] Furthermore, a wedge-shaped gap is provided between the first beam and / or second beam and the battery cell group, which allows the battery cell group to be inserted into the housing more easily and reduces the difficulty of insertion into the housing. The wedge-shaped gap can support a plan in which multiple battery cells are assembled into a module and then inserted into the housing, or a plan in which the battery cells are inserted into the housing and then fixed. After the battery cell group is inserted into the housing, the wedge-shaped gap is filled with a wedge-shaped member to lock the battery cell group, thereby improving assembly efficiency.

[0008] In some possible embodiments, the wedge-shaped member is fixed to the clamping beam.

[0009] In the embodiments of the present application, when the wedge-shaped member is fixed to the clamping beam, no relative movement occurs between the wedge-shaped member and the clamping beam, and the positions of each member in the housing are relatively constant. In this way, the mounting stability of the battery cell group in the housing is improved, thereby improving the rigidity and strength of the entire battery.

[0010] In some possible embodiments, the surface of the fastening beam facing the battery cell group is inclined away from the battery cell group with respect to the first direction.

[0011] In some possible embodiments, the clamping beam is a trapezoidal beam.

[0012] In some possible embodiments, the cross section of the trapezoidal beam is a right trapezoid, an isosceles trapezoid or a regular trapezoid.

[0013] In some possible embodiments, the surface of the battery cell group facing the clamping beam is inclined away from the clamping beam with respect to the first direction.

[0014] In the embodiment of the present application, a wedge-shaped gap is formed between the clamping beam and the battery cell group, and the wedge-shaped member is embedded in the wedge-shaped gap from the end where the gap between the clamping beam and the battery cell group is largest, thereby achieving clamping and positioning relative to the battery cell group.

[0015] In some possible embodiments, the included angle between the surface of the clamping beam facing the battery cell group and the surface of the battery cell group facing the clamping beam is smaller than 0° and smaller than 90°.

[0016] In the embodiments of the present application, by setting the included angle between the surface of the clamping beam facing the battery cell group and the surface of the battery cell group facing the clamping beam to an appropriate value, effective clamping of the battery cell group can be achieved and the difficulty of processing the wedge-shaped member can be reduced.

[0017] In some possible embodiments, the wedge-shaped member includes a first surface and a second surface that are disposed opposite each other, wherein the first surface is opposite and parallel to the surface of the battery cell group that faces the fastening beam, and the second surface is opposite and parallel to the surface of the fastening beam that faces the battery cell group.

[0018] In this way, the contact area between the wedge-shaped member and the battery cell group and the fastening beam can be increased, improving the ability of the wedge-shaped member to fasten the battery cell group.

[0019] In some possible embodiments, the wedge-shaped member further includes a third surface connecting the first surface and the second surface, and a first extension portion extending from the third surface along the first direction away from the battery cell group, wherein the first extension portion is connected to the fastening beam.

[0020] The wedge-shaped member is connected to the clamping beam via the first extension portion, and thus no relative movement is required between the wedge-shaped member and the clamping beam. This improves the ability of the wedge-shaped member to clamp onto the battery cell group, thereby improving the structural stability within the battery.

[0021] In some possible embodiments, the first extension is fastened together with the fastening beam via a bolt.

[0022] In some possible embodiments, the battery further includes an end plate disposed between the clamping beam and the battery cell group and attached to the battery cell group, wherein a step is disposed on the side of the end plate facing the clamping beam, wherein the wedge-shaped member further includes a third surface connecting the first surface and the second surface, and a second extension portion extending from the third surface along the first direction adjacent to the battery cell group, wherein the second extension portion engages with the step to restrict the position of the end plate in the second direction, wherein the second direction is perpendicular to the first direction and perpendicular to the extension direction of the clamping beam, and the extension direction of the clamping beam is perpendicular to the first direction.

[0023] The wedge-shaped member is attached to the step on the end plate via the second extension portion, and by restricting the position of the end plate and the battery cell group, the mounting stability of the battery cell group within the housing can be improved.

[0024] In addition, in the embodiments of the present application, wedge-shaped members are used to fasten the battery cell group to the housing, eliminating the need to provide bolt holes on the end plates whose axes are perpendicular to the first direction. By reducing the thickness of the end plates in the first direction in this manner, the space occupied by the end plates can be reduced, improving the space utilization rate within the battery and also improving the energy density of the battery.

[0025] In some possible embodiments, the battery further includes a busbar member for electrically connecting to the plurality of battery cells, the busbar member being installed at one end of the battery cell group in a third direction, the third direction being parallel to the extension direction of the fastening beam, and the extension direction of the fastening beam being perpendicular to the first direction.

[0026] In some possible embodiments, the first beam and the second beam are side walls of the housing.

[0027] In some possible embodiments, one of the first beam and the second beam is a side wall of the housing, and the other of the first beam and the second beam is a beam located within the housing, wherein the beam is for isolating the group of battery cells from other groups of battery cells.

[0028] In some possible embodiments, the first beam and the second beam are beams located within the housing, and the beams are for isolating the group of battery cells from other groups of battery cells.

[0029] According to a second aspect, there is provided a power consumption device comprising a battery of the first aspect or any possible embodiment of the first aspect above, the battery being for providing electrical energy to the power consumption device.

[0030] According to a third aspect, there is provided a method for manufacturing a battery, the method including: providing a battery cell group including a plurality of battery cells arranged along a first direction; a housing including first and second beams spaced apart along the first direction, the battery cell group being disposed between the first and second beams, wherein at least one of the first and second beams is a clamping beam, and a wedge-shaped gap is formed between the clamping beam and the battery cell group; providing a wedge-shaped member; and filling the wedge-shaped gap with the wedge-shaped member to clamp the battery cell group to the housing.

[0031] According to a fourth aspect, there is provided an apparatus for manufacturing a battery, the apparatus comprising: a battery cell group including a plurality of battery cells arranged along a first direction; a housing including first and second beams spaced apart along the first direction, the battery cell group being disposed between the first and second beams, wherein at least one of the first and second beams is a clamping beam; and a housing having a wedge-shaped gap between the clamping beam and the battery cell group; and the apparatus comprises: a providing module for providing a wedge-shaped member; and an attachment module for filling the wedge-shaped member into the wedge-shaped gap to clamp the battery cell group to the housing. [Brief explanation of the drawings]

[0032] In order to more clearly explain the technical solutions of the embodiments of the present application, the following briefly describes the drawings that need to be used in the embodiments of the present application, but it should be apparent that the drawings described below are only some embodiments of the present application, and those skilled in the art can obtain other drawings based on the drawings without any creative efforts, and the figures in the drawings may not be drawn to actual scale. [Figure 1] 1 is a structural schematic diagram of a vehicle according to an embodiment of the present application; [Figure 2] 1 is a schematic exploded structural view of a battery according to an embodiment of the present application; [Figure 3] 1 is a structural schematic diagram of a battery cell according to an embodiment of the present application; [Figure 4] 1 is a structural schematic diagram of a battery according to an embodiment of the present application; [Figure 5] FIG. 5 is a partial perspective schematic view of the battery in FIG. 4. [Figure 6] 1 is a structural schematic diagram of a battery according to an embodiment of the present application; [Figure 7] 1 is a structural schematic diagram of a battery according to an embodiment of the present application; [Figure 8] 1 is a structural schematic diagram of a battery according to an embodiment of the present application; [Figure 9] 1 is a structural schematic diagram of a battery according to an embodiment of the present application; [Figure 10] 1 is a structural schematic diagram of a battery cell according to an embodiment of the present application; [Figure 11] 1 is a partial structural schematic diagram of a battery according to an embodiment of the present application; [Figure 12] 1 is a partial structural schematic diagram of a battery according to an embodiment of the present application; [Figure 13] 1 is a partial structural schematic diagram of a battery according to an embodiment of the present application; [Figure 14] 1 is a partial structural schematic diagram of a battery according to an embodiment of the present application; [Figure 15] FIG. 15 is a partial perspective schematic view of the battery in FIG. 14. [Figure 16] 1 is a schematic plan view of a battery according to an embodiment of the present application; [Figure 17] 1 is a schematic flow chart of a battery manufacturing method according to an embodiment of the present application. [Figure 18] 1 is a schematic block diagram of a battery manufacturing apparatus according to an embodiment of the present application. DETAILED DESCRIPTION OF THE INVENTION

[0033] The embodiments of the present application will be described in more detail below in conjunction with the drawings and examples. The detailed description of the following examples and the drawings are intended to exemplify the principles of the present application, but are not intended to limit the scope of the present application, i.e., the present application is not limited to the described examples.

[0034] In the description of this application, unless otherwise specified, "multiple" means two or more (including two), and orientations or positional relationships indicated by terms such as "up," "down," "left," "right," "inside," and "outside" do not indicate or imply that the depicted devices or elements must have a particular orientation or be configured and operated in a particular orientation. These terms are merely for ease of explanation and brevity, and should not be understood as limitations of the application. Terms such as "first," "second," and "third" are used for descriptive purposes only and should not be understood as indicating or implying relative importance. "Perpendicular" does not mean perpendicular in the strict sense, but within a tolerance. "Parallel" does not mean parallel in the strict sense, but within a tolerance.

[0035] Any directions appearing in the following description refer to the directions shown in the drawings and are not intended to limit the specific structure of the present application. It should be further explained that in the description of the present application, unless otherwise clearly specified and limited, the terms "attached," "connected," and "connected" should be understood in a broad sense, and may refer to, for example, a non-detachable connection, a detachable connection, or an integral connection, and may be directly connected or indirectly connected via an intermediate medium. Those skilled in the art can understand the specific meanings of the above terms in the present application according to the specific circumstances.

[0036] The term "and / or" in this application merely describes the relationship between related objects and indicates that three relationships may exist, for example, A and / or B may indicate three situations: A exists, A and B simultaneously exist, and B exists. Also, the character " / " in this application generally indicates that the related objects before and after it are in an "or" relationship.

[0037] Unless otherwise defined, all scientific and technical terms used in this application have the same meaning as commonly understood by those skilled in the art. In this application, the terms used in the specification of the application are used only to describe specific embodiments and are not intended to limit the application. The terms "comprises," "has," and any variations thereof in the specification and claims of this application and the above-mentioned drawings are intended to cover a non-exclusive "comprises." The terms "first," "second," etc. in the specification and claims of this application or the above-mentioned drawings are intended to distinguish different objects and are not intended to describe a specific order or a primary-subordinate relationship.

[0038] The term "embodiment" as used herein means that a particular feature, structure, or characteristic described in connection with the embodiment may be included in at least one embodiment of the present application. The appearance of the phrase in various locations in the specification does not necessarily refer to the same embodiment, nor does it refer to an independent or alternative embodiment that is mutually exclusive from other embodiments. Those skilled in the art can explicitly and implicitly understand that the embodiment described in the present application may be combined with other embodiments.

[0039] In this application, a battery refers to a physical module that includes one or more battery cells to provide electrical energy. For example, the battery referred to in this application may include a battery module or a battery pack. A battery generally includes a housing for packaging one or more battery cells. The housing can prevent liquids or other foreign objects from affecting the charging or discharging of the battery cells.

[0040] Optionally, the battery cells may include lithium ion secondary batteries, lithium ion primary batteries, lithium sulfur batteries, sodium lithium ion batteries, sodium ion batteries, magnesium ion batteries, etc., which are not limited to examples of the present application. In some embodiments, the battery cells may be referred to as battery cores.

[0041] A battery cell includes an electrode assembly and an electrolyte, and the electrode assembly is composed of a positive electrode plate, a negative electrode plate, and a separator. The battery cell operates mainly through the movement of metal ions between the positive electrode plate and the negative electrode plate. The positive electrode plate includes a positive electrode current collector and a positive electrode active material layer. The positive electrode active material layer is coated on the surface of the positive electrode current collector. The positive electrode current collector without the positive electrode active material layer protrudes from the positive electrode current collector coated with the positive electrode active material layer, and the positive electrode current collector without the positive electrode active material layer is called a positive electrode tab. Taking a lithium-ion battery as an example, the positive electrode current collector may be made of aluminum, and the positive electrode active material may be lithium cobalt oxide, lithium iron phosphate, ternary lithium, lithium manganese oxide, etc. The negative electrode plate includes a negative electrode current collector and a negative electrode active material layer. The negative electrode active material layer is coated on the surface of the negative electrode current collector. The negative electrode current collector without the negative electrode active material layer protrudes from the negative electrode current collector coated with the negative electrode active material layer. The negative electrode current collector without the negative electrode active material layer is called a negative electrode tab. The material of the negative electrode current collector may be copper, and the negative electrode active material may be carbon or silicon. To prevent melting even when a large current is passed through the positive electrode tab, multiple positive electrode tabs are stacked, and multiple negative electrode tabs are stacked. The material of the separator may be polypropylene (PP) or polyethylene (PE). The electrode assembly may have a wound structure or a stacked structure, but the embodiments of the present application are not limited thereto.

[0042] The battery housing in the embodiments of the present application is for housing a plurality of battery cells, bus bar members, and other components of the battery. In some embodiments, the housing may be provided with a structure, such as a beam, for fixing the battery cells. The shape of the housing may be determined based on the number of battery cells to be housed. In some embodiments, the housing may be a rectangular parallelepiped having six walls.

[0043] The busbar members referred to in this application are intended to realize electrical connections between multiple battery cells, such as parallel connections, series connections, or series-parallel connections. The busbar components can realize the electrical connections between the battery cells by connecting the electrode terminals of the battery cells. In some embodiments, the busbar components can be fixed to the electrode terminals of the battery cells by welding. The busbar components transmit the voltage of the battery cells, and when multiple battery cells are connected in series, a high voltage is obtained. Accordingly, the electrical connection formed by the busbar components may be referred to as a "high voltage connection."

[0044] In some battery packaging techniques, multiple battery cells may first be assembled into a battery module, and the battery module may then be installed in a battery housing to form a battery pack. In other battery packaging techniques, multiple battery cells may be directly installed in a battery housing to form a battery pack; this type of battery packaging technique is sometimes referred to as cell-to-pack (CTP) packaging. By eliminating the intermediate stage of the battery module, CTP packaging reduces the mass of the battery pack and improves the energy density of the battery. That is, during the battery packaging process, multiple battery cells may directly form a battery, or they may first form a battery module, which then forms a battery. The battery is then installed in a power consumer to provide electrical energy for the power consumer.

[0045] The development of battery technology requires simultaneous consideration of a wide range of design factors, including performance parameters such as energy density, cycle life, discharge capacity, charge / discharge rate, etc. Furthermore, to improve the safety of batteries in power-consuming devices, the structural stability of the battery must also be taken into account.

[0046] In some battery packaging technologies, battery cells are interconnected and fixed with structural adhesive, which provides the entire battery with a certain strength and rigidity and prevents external impacts. However, in such cases, the application area of the structural adhesive between the battery cells is limited, and there is no interaction force between the battery cells, which affects the mounting stability of the battery cells within the housing, thereby affecting the structural stability of the battery, limiting the overall strength and rigidity of the packaged battery and posing certain potential safety risks.

[0047] In view of this, the present application provides a technical solution for installing a battery cell group between first and second beams that are spaced apart, wherein at least one of the first and second beams is used as a clamping beam, with a wedge-shaped gap between the clamping beam and the battery cell group, and a wedge-shaped member fills the wedge-shaped gap to clamp the battery cell group to the housing. Therefore, the engagement between the wedge-shaped member and the wedge-shaped gap stably clamps the battery cell group to the housing, and an interaction force is generated between the battery cells to bind them together, thereby improving the structural stability of the battery, improving the rigidity and strength of the entire battery, and reducing safety risks caused by vibration and shock during battery use.

[0048] The technical solutions described in the embodiments of the present application can be applied to various battery-powered devices, such as mobile phones, portable devices, laptops, battery-powered vehicles, electric toys, electric tools, electric vehicles, ships and spacecraft, and spacecraft include airplanes, rockets, space shuttles and spaceships.

[0049] It should be understood that the technical solutions described in the embodiments of the present application are not only applicable to the devices described above, but also to all devices that use batteries. However, for the sake of simplicity, the following embodiments will be described using an electric vehicle as an example.

[0050] For example, FIG. 1 shows a structural schematic diagram of a vehicle 1 according to an embodiment of the present application. The vehicle 1 may be a fuel oil vehicle, a gas vehicle, or a new energy vehicle. The new energy vehicle may be a battery-powered electric vehicle, a hybrid electric vehicle, or an extended-range electric vehicle. A motor 40, a controller 30, and a battery 10 may be installed inside the vehicle 1, and the controller 30 controls the battery 10 to supply power to the motor 40. For example, the battery 10 may be installed at the bottom, front, or rear of the vehicle 1. The battery 10 may be used to supply power to the vehicle 1. For example, the battery 10 may be used as an operating power source for the vehicle 1 and for the electric circuit system of the vehicle 1, for example, for starting, navigating, and operating power needs during driving of the vehicle 1. In another embodiment of the present application, the battery 10 may not only be used as an operating power source for the vehicle 1, but also as a driving power source for the vehicle 1, providing driving power to the vehicle 1 instead of, or in place of, fuel oil or natural gas.

[0051] To meet different power consumption needs, the battery 10 may include multiple battery cells, which may be connected in series, parallel, or series-parallel, with the series-parallel connection referring to a combination of series and parallel connections. The battery 10 may also be called a battery pack. Optionally, multiple battery cells may first be connected in series, parallel, or series-parallel to form a battery module, and then multiple battery modules may be connected in series, parallel, or series-parallel to form a battery. That is, multiple individual batteries may directly form the battery 10, or a battery module may first be formed, and the battery module may then further form the battery 10.

[0052] For example, FIG. 2 is a structural schematic diagram of a battery 10 according to an embodiment of the present application. The battery 10 may include a plurality of battery cells 20. The battery 10 may further include a housing (also called a cover) 11, which has a hollow structure and accommodates the plurality of battery cells 20. Exemplarily, referring to FIG. 2, the housing 11 may include two parts, here referred to as a first part 111 and a second part 112, respectively, which are engaged together to form an accommodation space for accommodating the plurality of battery cells 20. The shapes of the first part 111 and the second part 112 may be determined based on the combined shape of the plurality of battery cells 20, and each of the first part 111 and the second part 112 may have an opening. For example, the first part 111 and the second part 112 may both be hollow rectangular parallelepipeds, each with only one open side, with the opening of the first part 111 and the opening of the second part 112 facing each other, and the first part 111 and the second part 112 engaged with each other to form a housing 11 having a sealed cavity. After assembling a plurality of battery cells 20 in parallel, series, or series-parallel connections, they are placed inside the housing 11 formed by engaging the first part 111 and the second part 112.

[0053] Optionally, in some embodiments, the housing 11 further includes a beam 113, which is attached to at least one battery cell 20 among the plurality of battery cells 20 to fix the plurality of battery cells 20. The beam 113 may be disposed within the housing 11 and fixedly connected to the first portion 111 or the second portion 112.

[0054] The embodiment of the present application does not limit the manner in which the beam 113 is installed within the housing 11. In one example, one side of the beam 113 is attached to a side wall of the housing 11, and the other side of the beam 113 is attached to the battery cell 20. In such a case, the beam 113 may be considered to be part of the side wall of the housing 11. In another example, both sides of the beam 113 are attached to the battery cell 20, respectively. In such a case, the beam 113 may be considered to be an auxiliary structure for improving the mounting stability of the multiple battery cells 20 in the housing 11, and here, the beam 113 may be referred to as a beam.

[0055] The number of beams 113 in the housing 11 can be flexibly set to, for example, one, two, three, or other numbers according to actual usage needs. When there are a plurality of beams 113, the plurality of beams 113 may all be side walls of the housing 11, all may be beams, or some may be side walls of the housing 11 and some may be beams, and this application is not limited thereto.

[0056] In the embodiments of the present application, there are various methods for mounting the plurality of battery cells 20 inside the housing 11, which will be described below as examples.

[0057] Optionally, in one embodiment, a plurality of battery cells 20 may first be assembled into at least one battery module, and then the battery module may be mounted in the housing 11 to form a battery pack. In this embodiment, an auxiliary structure such as a beam may be installed between the battery modules to improve the mounting stability of the battery modules in the housing 11.

[0058] Optionally, in another embodiment, multiple battery cells 20 may be directly connected to each other and mounted and set in the housing 11 to form a battery pack. Because the intermediate state of the battery module is eliminated, auxiliary structures such as beams do not need to be installed in the housing 11, thereby reducing the weight of the battery 10 and improving the energy density of the battery 10. This embodiment may also be referred to as a cell-to-pack (CTP) mounting technique in the related art.

[0059] Optionally, in yet another embodiment, the housing 11 may be integrated into the power consuming device in which the battery 10 is located. In other words, the housing 11 may be integrally formed with a structural component of the power consuming device. After the plurality of battery cells 20 are connected to each other, they may be directly attached and installed in the housing 11 of the power consuming device. As an example, the housing 11 may be integrated and installed in a portion of the chassis of the vehicle 1, and the plurality of battery cells 20 may be directly attached to the chassis of the vehicle 1 after being connected to each other. This embodiment may be referred to as a cell-to-chassis (CTC) installation technique in the related art.

[0060] Optionally, the battery 10 may further include other structures, but the description thereof will be omitted here. For example, the battery 10 may further include busbar members for realizing electrical connection between the plurality of battery cells 20, such as parallel connection, series connection, or series-parallel connection. Specifically, the busbar members can be connected to the electrode terminals of the battery cells 20 to realize electrical connection between the battery cells 20. Furthermore, the busbar members can be fixed to the electrode terminals of the battery cells 20 by welding. Electrical energy from the plurality of battery cells 20 can further be extracted through the housing 11 by a conductive mechanism. Optionally, the conductive mechanism may belong to the busbar members.

[0061] The number of battery cells 20 may be set to any number according to various power demands. By connecting multiple battery cells 20 in series, parallel, or series-parallel, it is possible to achieve large capacity or power.

[0062] 3 is a structural schematic diagram of a battery cell 20 according to an embodiment of the present application. The battery cell 20 may include a battery box 21 and one or more electrode assemblies 22 housed in the battery box 21. In some embodiments, the battery box 21 may be referred to as a housing.

[0063] Referring to FIG. 3 , the battery box 21 may include a case 211, a first cover plate 212a, and a second cover plate 212b. The walls of the case 211 and the first and second cover plates 212a and 212b are collectively referred to as the walls of the battery cell 20. The case 211 is determined based on the shape of one or more electrode assemblies 22 assembled therein. For example, the case 211 shown in FIG. 3 may be a hollow rectangular parallelepiped. At least one surface of the case 211 has an opening through which one or more electrode assemblies 22 can be disposed within the case 211. For example, in the embodiment shown in FIG. 3 , two opposing surfaces of the case 211 each have an opening, and the first and second cover plates 212a and 212b cover the openings on the two surfaces, respectively, and are connected to the case 211 to form a sealed cavity in which the electrode assemblies 22 are disposed. The case 211 is filled with an electrolyte, for example, an electrolyte solution.

[0064] Optionally, in one embodiment, the first cover plate 212a and the second cover plate 212b may be molded independently and then connected to the case 211 to cover the opening, respectively. Alternatively, in another embodiment, one of the first cover plate 212a and the second cover plate 212b is integrally molded with the case 211, and the other is molded independently and then connected to the case 211 to cover the opening.

[0065] The battery cell 20 may further include two electrode terminals 214. Optionally, as shown in Fig. 3, the two electrode terminals 214 may be disposed on the first cover plate 212a and the second cover plate 212b, respectively. Alternatively, in some other embodiments, the two electrode terminals 214 may be disposed on the same cover plate, for example, both disposed on the first cover plate 212a or the second cover plate 212b.

[0066] The first cover plate 212a and the second cover plate 212b are generally flat, and two electrode terminals 214, a positive electrode terminal and a negative electrode terminal, may be fixed on the flat surfaces of the first cover plate 212a and the second cover plate 212b, respectively. Each electrode terminal 214 is provided with a corresponding connecting member (not shown), which may also be called a current collecting member, located between the first cover plate 212a and the electrode assembly 22 and between the second cover plate 212b and the electrode assembly 22, for establishing an electrical connection between the electrode assembly 22 and the electrode terminal 214.

[0067] Optionally, as shown in Fig. 3, the battery cell 20 may further include a first holder 216a and a second holder (not shown), where the first holder 216a is disposed between the electrode assembly 22 and the first cover plate 212a to fix and connect the first cover plate 212a. Correspondingly, the second holder is disposed between the electrode assembly 22 and the second cover plate 212b to fix and connect the second cover plate 212b. Optionally, the connecting members connecting the electrode assembly 22 and the electrode terminal 214 may be located in the first holder 216a and the second holder, respectively.

[0068] Each electrode assembly 22 in the battery cell 20 has a first tab 221 and a second tab (not shown). The first tab 221 and the second tab have opposite polarities. For example, if the first tab 221 is a positive electrode tab, the second tab is a negative electrode tab. The first tab 221 of one or more electrode assemblies 22 is connected to one electrode terminal via one connecting member, and the second tab of one or more electrode assemblies 22 is connected to another electrode terminal via another connecting member. For example, as shown in FIG. 3 , the electrode terminal 214 located on the first cover plate 212a may be connected to the first tab 221 via one connecting member located in the first holder 216a. The other electrode terminal 214 located on the second cover plate 212b may be connected to the second tab via another connecting member located in the second holder.

[0069] In the battery cell 20, the number of electrode assemblies 22 can be flexibly set to, for example, one, two, four, or other numbers according to the actual usage needs.

[0070] For example, a pressure relief mechanism 213 may be further installed on one wall of the battery cell 20. The pressure relief mechanism 213 is operable to release the internal pressure or temperature when the internal pressure or temperature of the battery cell 20 reaches a threshold value.

[0071] Optionally, in another embodiment of the present application, the pressure relief mechanism 213 and the electrode terminal 214 (positive electrode terminal and / or negative electrode terminal) are installed on the same wall of the battery cell 20. Exemplarily, as shown in FIG. 3 , the electrode terminal 214 and the pressure relief mechanism 213 may both be installed on the second cover plate 212b of the battery cell 20.

[0072] By locating the pressure relief mechanism 213 and the electrode terminal 214 on the same wall of the battery cell 20, the pressure relief mechanism 213 and the electrode terminal 214 can be easily processed and attached, which is advantageous for improving the production efficiency of the battery 10.

[0073] Of course, in other embodiments of the present application, the pressure relief mechanism 213 may be installed on different walls of the battery cell 20 from the electrode terminal 214. For example, the two electrode terminals 214 of the battery 10 are respectively installed on the first cover plate 212a and the second cover plate 212b of the battery cell 20, and the pressure relief mechanism 213 is installed on a wall of the battery 10 other than the first cover plate 212a and the second cover plate 212b, for example, on the case 211. Alternatively, the two electrode terminals 214 of the battery 10 are both installed on the first cover plate 212a of the battery cell 20, and the pressure relief mechanism 213 is installed on the second cover plate 212b of the battery cell 20.

[0074] By locating the pressure relief mechanism 213 and the electrode terminal 214 on different walls of the battery cell 20, when the pressure relief mechanism 213 is activated, the discharged matter of the battery cell 20 can be moved further away from the electrode terminal 214, thereby reducing the impact of the discharged matter on the electrode terminal 214 and the busbar components, and thus enhancing the safety of the battery.

[0075] The pressure relief mechanism 213 may be part of the wall on which it is located, or may be a separate structure from the wall on which it is located, for example, by welding. For example, in the embodiment shown in FIG. 3, if the pressure relief mechanism 213 is part of the second cover plate 212b, the pressure relief mechanism 213 may be formed by installing a notch on the second cover plate 212b, and the thickness of the second cover plate 212b corresponding to the notch is smaller than the thickness of the other areas of the pressure relief mechanism 213 other than the notch. The notch is the weakest point of the pressure relief mechanism 213. When too much gas is generated from the battery cell 20, causing the internal pressure of the case 211 to rise and reach a threshold, or when a reaction occurs inside the battery cell 20, generating heat and causing the internal temperature of the battery cell 20 to rise and reach a threshold, the pressure relief mechanism 213 will burst at the notch, connecting the inside and outside of the case 211, and the gas pressure and temperature will be released to the outside by the rupture of the pressure relief mechanism 213, thereby preventing the battery cell 20 from exploding.

[0076] Furthermore, the pressure relief mechanism 213 may be any possible pressure relief mechanism, but is not limited thereto in the embodiments of the present application. For example, the pressure relief mechanism 213 may be a temperature-sensitive pressure relief mechanism configured to melt when the internal temperature of the battery cell 20 provided with the pressure relief mechanism 213 reaches a threshold, and / or the pressure relief mechanism 213 may be a pressure-sensitive pressure relief mechanism configured to burst when the internal air pressure of the battery cell 20 provided with the pressure relief mechanism 213 reaches a threshold.

[0077] Optionally, as shown in FIG. 3 , the battery cell 20 may further include a first protective layer 215a and a second protective layer 215b. The first protective layer 215a and the second protective layer 215b cover the first cover plate 212a and the second cover plate 212b, thereby protecting the components on the two cover plates. Optionally, when the first cover plate 212a and the second cover plate 212b are metal cover plates, the first protective layer 215a and the second protective layer 215b may be insulating layers to insulate the metal cover plates from the outside. Furthermore, as can be seen from FIG. 3, openings suitable for the electrode terminals 214 and the pressure relief mechanism 213 may be formed on the first protective layer 215a and the second protective layer 215b, so that the electrode terminals 214 are connected to the busbar members through the openings, and the pressure relief mechanism 213 releases the internal air pressure of the battery cells 20 through the openings.

[0078] 4 shows a schematic structural diagram of a battery according to an embodiment of the present application, where (a) in FIG. 4 is an assembled schematic diagram of the battery, and (b) in FIG. 4 is a partially exploded schematic diagram of the battery. For ease of understanding, FIG. 5 further shows a schematic partial perspective view of the battery in FIG. 4.

[0079] 4 and 5 , the battery 10 includes a battery cell group 2 and a housing 11, and the housing 11 is configured to house the battery cell group 2. The battery cell group 2 includes a plurality of battery cells 20 arranged along a first direction. The housing 11 includes a first beam 101 and a second beam 102 spaced apart along the first direction, and the battery cell group 2 is disposed between the first beam 101 and the second beam 102, where at least one of the first beam 101 and the second beam 102 is a clamping beam, and a wedge-shaped gap 12 is formed between the clamping beam and the battery cell group 2. The battery 10 further includes a wedge-shaped member 13, which fills the wedge-shaped gap 12 to clamp the battery cell group 2 to the housing 11.

[0080] Optionally, in the embodiment of the present application, for the internal structure of the battery cell 20, please refer to the relevant description of the embodiment shown in Fig. 3 above. In order to facilitate the installation of the battery cell 20 in the housing 11 and improve the installation stability of the battery cell 20, the battery cell 20 may have a polyhedron structure. For example, the battery cell 20 may have a hexahedron structure.

[0081] Optionally, in the embodiment of the present application, the housing 11 may be the housing 11 in the embodiment shown in FIG. 2 above. To facilitate installation of the housing 11 in the power consumption device, the housing 11 may have a hollow hexahedron structure, for example and not by way of limitation. In the embodiment of the present application, the first beam 101 and the second beam 102 are part of the housing 11, and during the actual assembly process, when at least the battery cell group 2 is disposed between the first beam 101 and the second beam 102, the positional relationship between the first beam 101 and the second beam 102 is relatively constant. After the assembly is completed, the position of the first beam 101 in the housing 11 is relatively constant, and the position of the second beam 102 in the housing 11 is relatively constant.

[0082] In the embodiment of the present application, the first beam 101 and / or the second beam 102 is a clamping beam, and a wedge-shaped gap 12 is formed between the clamping beam and the battery cell group 2. Specifically, the wedge-shaped gap 12 is formed by a surface of the clamping beam facing the battery cell group 2 and a surface of the battery cell group 2 facing the clamping beam being inclined relative to each other, or by a surface of the clamping beam facing the battery cell group 2 and a surface of the battery cell group 2 facing the clamping beam gradually converging. Here, the distance between the surface of the clamping beam facing the battery cell group 2 and the surface of the battery cell group 2 facing the clamping beam (i.e., the distance in both first directions) gradually increases in a certain direction (for example, a direction perpendicular to the first direction, such as the Z direction shown in FIG. 4 ). In other words, the plane on which the surface of the fastening beam facing the battery cell group 2 is located and the plane on which the surface of the battery cell group 2 facing the fastening beam are located intersect in a certain direction (for example, a direction perpendicular to a first direction such as the Z direction shown in FIG. 4 ) and then move away from each other. Here, the distance between the surface of the fastening beam facing the battery cell group 2 and the surface of the battery cell group 2 facing the fastening beam may be considered to be the distance between the fastening beam and corresponding points of the battery cell group 2 in the first direction.

[0083] It should be noted that in the embodiments of the present application, the first direction may include a positive direction and a negative direction. For example, the positive direction of the first direction may be the direction X indicated by the arrow in FIG. 4, while the negative direction of the first direction is opposite to the positive direction of the first direction, i.e., the negative direction of the first direction is opposite to the direction X indicated by the arrow in FIG. 4, i.e., the opposite direction of the direction X. The first direction may be, by way of example and not limitation, perpendicular to the direction of gravity.

[0084] It should be further explained that in the embodiments of the present application, the battery cell group 2 may further include other members, such as auxiliary fixing members (e.g., end plates), and thus the above-mentioned "surface of the battery cell group 2 facing the clamping beam" refers to the surface of the entire battery cell group 2 that is closest to the clamping beam and faces the clamping beam. For example, if a battery cell included in the battery cell group 2 is adjacent to the clamping beam, the surface of the battery cell group 2 facing the clamping beam refers to the surface of the battery cell closest to the clamping beam that faces the clamping beam. Furthermore, for example, the battery cell group 2 may further include other members, such as end plates located on both sides of the multiple battery cells 20, and thus the surface of the battery cell group 2 facing the clamping beam refers to the surface of the end plate closest to the clamping beam that faces the clamping beam.

[0085] It should be understood that the "surface of the clamping beam facing the battery cell group 2" referred to above means a part or all of the surface. The "surface of the battery cell group 2 facing the clamping beam" referred to above means a part or all of the surface. For ease of description, in FIG. 4 and in each of the following examples, the surface of the battery cell group 2 facing the clamping beam will be referred to as the first clamping surface 10a, and the surface of the clamping beam facing the battery cell group 2 will be referred to as the second clamping surface 10b.

[0086] In the embodiment of the present application, the wedge-shaped member 13 has one large end and the other small end, or one thick end and the other thin end, and is adapted to the shape of the wedge-shaped gap 12, filling part or all of the wedge-shaped gap 12 to secure the battery cell group 2. Specifically, the surface of the wedge-shaped member 13 facing the battery cell group 2 and the surface of the wedge-shaped member 13 facing the clamping beam gradually converge.

[0087] According to the technical solution of the embodiment of the present application, a battery cell group 2 is installed between a first beam 101 and a second beam 102 that are installed at a distance from each other, wherein at least one of the first beam 101 and the second beam 102 is used as a clamping beam, and a wedge-shaped gap 12 exists between the clamping beam and the battery cell group 2, and a wedge-shaped member 13 can fill the wedge-shaped gap 12 to clamp the battery cell group 2 to the housing 11.

[0088] In the embodiment of the present application, the battery cell group 2 can be securely and stably fastened to the housing 11 by utilizing the engagement between the wedge-shaped member 13 and the wedge-shaped gap 12. Furthermore, since an interaction force occurs between the battery cells due to extrusion, adjacent battery cells are constrained to each other, improving the structural stability of the battery, thereby improving the rigidity and strength of the entire battery and reducing safety risks caused by vibration and shock during battery use.

[0089] Furthermore, there is a wedge-shaped gap 12 between the first beam 101 and / or the second beam 102 and the battery cell group 2, which makes it easier to insert the battery cell group 2 into the housing 11 and reduces the difficulty of inserting the battery cell group 2 into the housing. The wedge-shaped gap 12 can support a plan in which multiple battery cells 20 are assembled into a module and then inserted into the housing, or a plan in which the battery cells 20 are inserted into the housing and then fixed. After the battery cell group 2 is inserted into the housing, the wedge-shaped gap 12 is filled with a wedge-shaped member 13 to lock the battery cell group 2, thereby improving assembly efficiency.

[0090] In the embodiment of the present application, the wedge-shaped members 13 are used to fasten the battery cell group 2 to the housing 11, so there is no need to provide bolt holes whose axes are perpendicular to the first direction on the auxiliary fixing members (e.g., end plates). By reducing the thickness of the auxiliary fixing members (e.g., end plates) in the first direction in this way, the space occupied by the auxiliary fixing members can be reduced, improving the space utilization rate within the battery and further improving the energy density of the battery.

[0091] Optionally, in some embodiments, the wedge-shaped member 13 may be fixed to the clamping beam. That is, the wedge-shaped member 13 may be fixedly connected to the clamping beam. For example, the wedge-shaped member 13 may be connected to the clamping beam by adhesive, welding, caulking, or the like, or may be connected to the clamping beam by a screw connection, a pin connection, or the like, and the embodiments of the present application are not limited thereto.

[0092] 4 , by way of example and not limitation, when the first beam 101 and the second beam 102 are both fastening beams, there is a wedge-shaped gap 12 between the first beam 101 and the battery cell group 2, and there is also a wedge-shaped gap 12 between the second beam 102 and the battery cell group 2. For ease of description, hereinafter, the wedge-shaped gap between the first beam 101 and the battery cell group 2 will be referred to as the first wedge-shaped gap, and the wedge-shaped gap between the second beam 102 and the battery cell group 2 will be referred to as the second wedge-shaped gap. Accordingly, a wedge-shaped member for filling the first wedge-shaped gap may be referred to as the first wedge-shaped member 131, and a wedge-shaped member for filling the second wedge-shaped gap may be referred to as the second wedge-shaped member 132. In the above embodiment, the wedge-shaped members 13 are fixed to the clamping beams, which means that the first wedge-shaped member 131 is fixed to the first beam 101 and the second wedge-shaped member 132 is fixed to the second beam 102. In other words, the wedge-shaped member 13 is fixed to the clamping beam that is closest to or adjacent to it.

[0093] In the embodiment of the present application, when the wedge-shaped member 13 is fixed to the clamping beam, no relative movement occurs between the wedge-shaped member 13 and the clamping beam, and the positions of each member in the housing 11 are relatively constant. In this way, by improving the mounting stability of the battery cell group 2 in the housing 11, the rigidity and strength of the entire battery can be improved.

[0094] Optionally, in some other embodiments, the wedge-shaped member 13 may not be fixedly connected to the clamping beam, and the relative fixation of the wedge-shaped member 13 may be achieved only by engagement with the wedge-shaped gap. For example, by increasing the surface roughness of the wedge-shaped member 13, the frictional force between the wedge-shaped member 13 and the clamping beam and the battery cell group 2 can be increased, thereby preventing relative movement between the wedge-shaped member 13 and the clamping beam and the battery cell group 2, thereby achieving stable clamping to the battery cell group 2. In such a configuration, no additional processing is required for the wedge-shaped member 13, simplifying the assembly steps and improving the assembly efficiency of the battery.

[0095] As mentioned above, the wedge-shaped gap 12 is formed by the gradual convergence of the surface of the clamping beam facing the battery cell group 2 (i.e., the second clamping surface 10b) and the surface of the battery cell group 2 facing the clamping beam (i.e., the first clamping surface 10a). In the embodiments of the present application, various methods for realizing the wedge-shaped gap 12 are available, which will be described in detail below with reference to the drawings.

[0096] As an example, the surface of the clamping beam facing the battery cell group 2 is inclined relative to the first direction away from the battery cell group 2. For example, referring to FIG. 4, the second clamping surface 10b is inclined relative to the first direction away from the battery cell group 2. In this way, the engagement between the clamping beam and the battery cell group 2 can form a wedge-shaped gap 12.

[0097] For ease of understanding, an example will be taken in which the first beam 101 and the second beam 102 are both fastening beams, and as shown in Figure 4, the surface of the first beam 101 facing the battery cell group 2 is inclined to one side of direction X shown in the figure with respect to the first direction, and the surface of the second beam 102 facing the battery cell group 2 is inclined to one side of direction X with respect to the first direction. As can be seen from Figure 4, the angle between the surface of the first beam 101 facing the battery cell group 2 and direction X is an acute angle, and the angle between the surface of the second beam 102 facing the battery cell group 2 and the direction opposite direction X is also an acute angle.

[0098] Optionally, the acute angle between the second clamping surface 10b and the first direction is [30°, 90°], may be, for example, [45°, 85°], or may be, for example, [60°, 75°].

[0099] As another example, the surface of the battery cell group 2 facing the clamping beam is inclined away from the clamping beam with respect to the first direction. For example, referring to Fig. 6, the first clamping surface 10a is inclined away from the clamping beam with respect to the first direction. In this way, the engagement between the battery cell group 2 and the clamping beam can form a wedge-shaped gap 12.

[0100] For ease of understanding, an example will be taken in which the first beam 101 and the second beam 102 are both fastening beams, and as shown in Figure 5, the surface of the battery cell group 2 facing the first beam 101 is inclined to one side of the direction opposite to direction X shown in the figure with respect to the first direction, and the surface of the battery cell group 2 facing the second beam 102 is inclined to one side of direction X with respect to the first direction. As can be seen from Figure 5, the angle between the surface of the battery cell group 2 facing the first beam 101 and the direction opposite to direction X is an acute angle, and the angle between the surface of the battery cell group 2 facing the second beam 102 and direction X is also an acute angle.

[0101] Optionally, the acute angle between the first clamping surface 10a and the first direction is [30°, 90°], may be, for example, [45°, 85°], or may be, for example, [60°, 75°].

[0102] 4 and 6, the surface of the clamping beam facing the battery cell group 2 may be inclined away from the battery cell group 2 with respect to the first direction, and the surface of the battery cell group 2 facing the clamping beam may be inclined away from the clamping beam with respect to the first direction. For example, referring to FIG. 7, the second clamping surface 10b may be inclined away from the battery cell group 2 with respect to the first direction, and the first clamping surface 10a may be inclined away from the clamping beam with respect to the first direction, forming a wedge-shaped gap 12.

[0103] As a further example, the surface of the clamping beam facing the battery cell group 2 is inclined away from the battery cell group 2 with respect to the first direction, and the surface of the battery cell group 2 facing the clamping beam is inclined toward the clamping beam with respect to the first direction, where the inclination of the surface of the clamping beam facing the battery cell group 2 is greater than the inclination of the surface of the battery cell group 2 facing the clamping beam. For example, referring to FIG. 8 , the second clamping surface 10b is inclined away from the battery cell group 2 with respect to the first direction, and the first clamping surface 10a is inclined toward the clamping beam with respect to the first direction, where the inclination of the second clamping surface 10b is greater than the inclination of the first clamping surface 10a. That is, the acute angle formed between the second clamping surface 10b and the first direction is smaller than the acute angle formed between the first clamping surface 10a and the first direction. In this way, the first clamping surface 10a and the second clamping surface 10b tend to converge gradually, forming a wedge-shaped gap 12.

[0104] Of course, in some other embodiments, the first clamping surface 10a may be inclined away from the clamping beam with respect to the first direction, and the second clamping surface 10b may be inclined toward the battery cell group 2 with respect to the first direction, where the inclination of the first clamping surface 10a is greater than the inclination of the second clamping surface 10b. That is, the acute angle between the first clamping surface 10a and the first direction is smaller than the acute angle between the second clamping surface 10b and the first direction, and thus a wedge-shaped gap 12 can be formed between the clamping beam and the battery cell group 2.

[0105] In the embodiment of the present application, a wedge-shaped gap 12 is formed between the clamping beam and the battery cell group 2, and the wedge-shaped member 13 is embedded in the wedge-shaped gap 12 from the end where the gap between the clamping beam and the battery cell group 2 is largest, thereby achieving clamping and positioning relative to the battery cell group 2.

[0106] When the first beam 101 or the second beam 102 is a clamping beam, the battery cell group 2 can be clamped with a single wedge-shaped member 13 (e.g., the first wedge-shaped member 131 or the second wedge-shaped member 132), which simplifies operation and improves battery assembly efficiency.

[0107] When the first beam 101 and the second beam 102 are both clamping beams, the battery cell group 2 can be clamped by engagement between the first wedge-shaped member 131 and the second wedge-shaped member 132, thereby achieving accurate positioning of the battery cell group 2 within the housing 11.

[0108] In the embodiments of the present application, when one of the first beam 101 and the second beam 102 is a clamping beam, the method for forming the wedge-shaped gap 12 may be any one of the above-mentioned methods. When both the first beam 101 and the second beam 102 are clamping beams, the method for forming the wedge-shaped gap 12 between the first beam 101 and the battery cell group 2 (i.e., the first wedge-shaped gap) and the method for forming the wedge-shaped gap 12 between the second beam 102 and the battery cell group 2 (i.e., the second wedge-shaped gap) may be the same (e.g., using any one of the above-mentioned methods) or different (e.g., using any two of the above-mentioned methods), and the embodiments of the present application are not limited thereto, and will be described below as an example only in conjunction with FIGS. 7 and 9.

[0109] For example, referring to FIG. 7 , the first beam 101 and the second beam 102 are both clamping beams. The second clamping surface 10b of the first beam 101 and the second clamping surface 10b of the second beam 102 are both installed so as to be inclined away from the battery cell group 2 with respect to the first direction. The first clamping surface 10a facing the first beam 101 of the battery cell group 2 is installed so as to be inclined away from the first beam 101 with respect to the first direction. The first clamping surface 10a facing the second beam 102 of the battery cell group 2 is installed so as to be inclined away from the second beam 102 with respect to the first direction. In this way, a first wedge-shaped gap 121 is formed between the first beam 101 and the battery cell group 2, and a second wedge-shaped gap 122 is formed between the second beam 102 and the battery cell group 2.

[0110] In this way, the first wedge gap 121 and the second wedge gap 122 each have a larger gap on one side and a smaller gap on the other side in a direction perpendicular to the first direction. During actual assembly, the first wedge member 131 and the second wedge member 132 are driven into the first wedge gap 121 and the second wedge gap 122, respectively, on the same side of the battery cell group 2, for example, from the opposite direction of direction Z shown in FIG. 7, which allows for easy installation and improves battery production efficiency.

[0111] 9, for example, the first beam 101 and the second beam 102 are both clamping beams. The first clamping surface 10a facing the first beam 101 of the battery cell group 2 is inclined toward the side closer to the first beam 101 with respect to the first direction. The first clamping surface 10a facing the second beam 102 of the battery cell group 2 is inclined toward the side away from the second beam 102 with respect to the first direction. The second clamping surface 10b of the first beam 101 and the second clamping surface 10b of the second beam 102 may be parallel to each other. Alternatively, the second clamping surface 10b of the first beam 101 is inclined toward the side closer to the battery cell group 2 with respect to the first direction, and the second clamping surface 10b of the second beam 102 is inclined toward the side away from the battery cell group 2 with respect to the first direction. In this way, a first wedge-shaped gap 121 is formed between the first beam 101 and the battery cell group 2, and a second wedge-shaped gap 122 is formed between the second beam 102 and the battery cell group 2.

[0112] Thus, in a direction perpendicular to the first direction, the larger gap side of the first wedge gap 121 and the smaller gap side of the second wedge gap 122 are located on the same side, and the smaller gap side of the first wedge gap 121 and the larger gap side of the second wedge gap 122 are located on the same side. During actual assembly, the first wedge member 131 and the second wedge member 132 are driven into the first wedge gap 121 and the second wedge gap 122, respectively, from both sides of the battery cell group 2. For example, the first wedge member 131 is driven into the first wedge member 131 along direction Z shown in FIG. 9 and the second wedge member 132 is driven into the second wedge member 132 in the direction opposite to direction Z shown in FIG. 9. In this way, different wedge members may have different arrangement patterns and driving directions, which can be applied to various complex fastening situations.

[0113] Optionally, in each of the above embodiments, the included angle between the first clamping surface 10a and the second clamping surface 10b may be θ (see FIG. 7 ), where the value of θ may be [0°, 120°], for example, [0°, 90°], or for example, [10°, 45°].

[0114] In the embodiment of the present application, by setting the included angle between the first clamping surface 10a and the second clamping surface 10b to an appropriate value, effective clamping of the battery cell group 2 can be achieved and the processing difficulty of the wedge-shaped member 13 can be reduced.

[0115] Optionally, in some embodiments, the direction of convergence of the first clamping surface 10a and the second clamping surface 10b may be perpendicular to the first direction. For example, the first clamping surface 10a and the second clamping surface 10b may converge along direction Z or the opposite direction to direction Z, or along direction Y or the opposite direction to direction Y. The convergence direction involved here may be defined as the extension direction of a central plane located between the first clamping surface 10a and the second clamping surface 10b, or as the extension direction of the first clamping surface 10a or the second clamping surface 10b. The specific definition may be based on actual needs, and the present application does not particularly limit it.

[0116] Optionally, in some other embodiments, the direction of convergence of the first clamping surface 10a and the second clamping surface 10b may be perpendicular to the longitudinal direction of the clamping beam (e.g., direction Y shown in FIG. 5).

[0117] As can be seen, in three-dimensional space, the size of the clamping beam in its longitudinal direction is greater than the size of the clamping beam in other directions; in other words, the direction in which the clamping beam has the largest size is its longitudinal direction.

[0118] Optionally, in some embodiments, the clamping beam may be a trapezoidal beam (see FIGS. 4, 7, 8) or a rectangular beam (see FIGS. 6, 9).

[0119] In the embodiments of the present application, a trapezoidal beam can be understood as a beam whose cross section in a plane perpendicular to the longitudinal direction of the beam (e.g., the XZ plane shown in FIG. 4) is a trapezoid (e.g., a right-angled trapezoid, an isosceles trapezoid, or a regular trapezoid). It should be noted that the trapezoid in the above context refers to the shape of the outer contour of the cross section of the beam. The trapezoid includes a regular trapezoid and an approximate trapezoid, where an approximate trapezoid can be understood to mean that the outer contour of the cross section of the beam is approximately trapezoidal. Corresponding to the beam, that is, the main frame of the beam has a trapezoidal structure, that is, the main frame of the beam has a trapezoidal cross section in a plane perpendicular to the longitudinal direction of the beam, but the beam may further include other auxiliary members extending from the main frame of the beam. In other words, the trapezoidal beam in the embodiments of the present application includes a regular trapezoidal beam and a beam that is an approximately trapezoidal beam obtained by modifying a regular trapezoidal beam.

[0120] Similar to a trapezoidal beam, in the embodiments of the present application, a rectangular beam can be understood as a beam whose cross section in a plane perpendicular to the longitudinal direction of the beam (for example, the XZ plane shown in FIG. 5) is rectangular. It should be noted that the rectangular in the above context refers to the shape of the outer contour of the cross section of the beam. The rectangular beam in the embodiments of the present application includes a regular rectangular beam and a beam obtained by modifying a regular rectangular beam (for example, the main frame of the beam has a rectangular structure, but the beam may further include other auxiliary members extending from the main frame of the beam).

[0121] Optionally, in some embodiments, referring to Figures 4 and 5, the battery cells 20 included in the battery cell group 2 may be rectangular battery cells. For example, the rectangular battery cells may form a rectangular battery cell group 2, and the rectangular battery cell group 2 may engage with a trapezoidal beam to form a wedge-shaped gap 12, where the second clamping surface 10b of the trapezoidal beam is inclined away from the battery cell group 2 with respect to the first direction.

[0122] Optionally, in some other embodiments, referring to FIG. 7 , the battery cells 20 included in the battery cell group 2 have a polyhedron structure, and the battery cells 20 include a first wall 201 and a second wall 202 connected to each other, where the first wall 201 is parallel to a first direction and the second wall 202 is installed at an angle relative to the first wall 201. A plurality of battery cells 20 can be stacked along the first direction to form the battery cell group 2, where two adjacent battery cells 20 can be attached to each other via the second wall 202. For example, as shown in FIGS. 6 to 9 , the second wall 202 of the battery cell 20 adjacent to the fastening beam can engage with a rectangular beam or a trapezoidal beam to form a wedge-shaped gap 12.

[0123] In the embodiment of the present application, the second wall 202 of the battery cell 20 is installed at an incline relative to the first wall 201, and two adjacent battery cells in the first direction are attached to each other via their respective second walls 202. Therefore, an interaction force is formed between the adjacent second walls 202, and at least one inclined second wall 202 of each battery cell is pressed against the inclined second wall 202 of the adjacent battery cell, and an interaction force is formed between the adjacent battery cells, which restrains and constrains each other, improving the rigidity and strength of the entire battery and reducing safety risks caused by vibration and shock during use of the battery.

[0124] FIG. 10 shows a structural schematic diagram of a battery cell according to an embodiment of the present application.

[0125] In one example, as shown in (a) of FIG. 10, the battery cell 20 may include two first walls 201 that are arranged in parallel and two second walls 202 that are arranged non-parallel, and the cross section of the battery cell 20 in a plane perpendicular to the first walls 201 and the second walls 202 is trapezoidal.

[0126] In this way, when a plurality of battery cells 20 are stacked along the first direction, connections between the plurality of battery cells can be more easily realized, and battery production efficiency can be improved.

[0127] In another example, as shown in (b) of FIG. 10, the battery cell 20 may include two first walls 201 arranged in parallel and two second walls 202 arranged in parallel, and the cross section of the battery cell 20 in a plane perpendicular to the first walls 201 and the second walls 202 is a parallelogram.

[0128] Therefore, when multiple battery cells 20 are stacked along the first direction, connections between the multiple battery cells can be more easily achieved, improving battery production efficiency. Furthermore, the structure of the battery cells 20 is regular and symmetrical, making it easy to manufacture and install the battery cells.

[0129] It can be understood that the battery cell 20 may also have other shapes, such as a polyhedral structure, such as a triangular prism, a pentagonal prism, etc., and can be specifically designed according to actual needs, and will not be further detailed here.

[0130] Above, referring to Figures 4 to 10, we have mainly explained the structure of the battery according to the embodiment of the present application, and described in detail the wedge-shaped gap 12 related to the present application. Below, referring to Figures 11 to 14, we will mainly explain in detail the wedge-shaped member 13 related to the present application. For related descriptions of other members, please refer to the above, and for the sake of brevity, the description will be omitted below.

[0131] FIG. 11 shows a schematic diagram of a partial structure of a battery according to an embodiment of the present application.

[0132] 11(a), the wedge-shaped member 13 includes a first surface 1301 and a second surface 1302 that are disposed opposite each other. The first surface 1301 is for attachment to the surface of the battery cell group 2 facing the fastening beam (i.e., the first fastening surface 10a), and the second surface 1302 is for attachment to the surface of the fastening beam facing the battery cell group (i.e., the second fastening surface 10b).

[0133] 11(b), when the wedge-shaped member 13 is filled into the wedge gap 12, the first surface 1301 of the wedge-shaped member 13 is parallel to and faces the surface of the battery cell group 2 facing the clamping beam, and the second surface 1302 of the wedge-shaped member 13 is parallel to and faces the surface of the clamping beam facing the battery cell group 2. After assembly of the wedge-shaped member 13 is complete, the first surface 1301 is attached to the first clamping surface 10a, and the second surface 1302 is attached to the second clamping surface 10b.

[0134] In the embodiment of the present application, the first surface 1301 and the second surface 1302 of the wedge-shaped member 13 are parallel to the first clamping surface 10a and the second clamping surface 10b, respectively, and are attached to them, which increases the contact area between the wedge-shaped member 13 and the battery cell group 2 and the clamping beam, thereby improving the clamping ability of the wedge-shaped member 13 to the battery cell group 2.

[0135] Fig. 12 shows a partial structural schematic diagram of another battery according to an embodiment of the present application. Unlike the battery shown in Fig. 11, as shown in Fig. 12(a), the wedge-shaped member 13 further includes a third surface 1303 connecting the first surface 1301 and the second surface 1302, and a first extension portion 1304 extending from the third surface 1303 along the first direction away from the battery cell group 2. The first extension portion 1304 is for connection with a fastening beam.

[0136] After the assembly of the wedge-shaped member 13 is completed, as shown in (b) of Figure 12, the first surface 1301 is attached to the first clamping surface 10a, the second surface 1302 is attached to the second clamping surface 10b, and the first extension portion 1304 is connected to the clamping beam.

[0137] Optionally, the first extension 1304 may be connected to the clamping beam by adhesive, welding, caulking, bolting, or the like.

[0138] Optionally, in some embodiments, referring to FIG. 12 , the clamping beam may include a third clamping surface 10c connected to the second clamping surface 10b, the third clamping surface 10c for attachment to the first extension portion 1304.

[0139] In the embodiment of the present application, the wedge-shaped member 13 is connected to the clamping beam via the first extension portion 1304, and thus relative movement between the wedge-shaped member 13 and the clamping beam does not need to occur, and by improving the clamping ability of the wedge-shaped member 13 to the battery cell group 2, the structural stability inside the battery can be improved.

[0140] Fig. 13 is a schematic diagram of a partial structure of another battery according to an embodiment of the present application. Unlike the battery shown in Fig. 11, as shown in Fig. 13(a), the wedge-shaped member 13 further includes a third surface 1303 connecting the first surface 1301 and the second surface 1302, and a second extension portion 1305 extending from the third surface 1303 in the first direction close to the battery cell group 2.

[0141] 13(a), the battery 10 further includes an end plate 23 that is disposed between the fastening beam and the battery cell group 2 and is attached to the battery cell group 2. A step 231 is disposed on the side of the end plate 23 facing the fastening beam. The second extension 1305 engages with the step 231 to limit the position of the end plate 23 in the second direction.

[0142] In the embodiment of the present application, the second direction is perpendicular to the first direction and perpendicular to the extension direction of the clamping beam, and the extension direction of the clamping beam is perpendicular to the first direction. In other words, the first direction, the second direction, and the extension direction of the clamping beam are three mutually perpendicular directions, such as direction X, direction Z, and direction Y shown in the drawings.

[0143] For illustrative purposes, the extension direction of the clamping beam may be considered to be the longitudinal direction of the clamping beam. As can be understood, in three-dimensional space, the size of the clamping beam in its longitudinal direction is greater than the size of the clamping beam in other directions, i.e., the direction in which the clamping beam has the largest size is its longitudinal direction, i.e., its extension direction.

[0144] 13(b), after assembly of the wedge-shaped member 13 is completed, the first surface 1301 is attached to the first clamping surface 10a, the second surface 1302 is attached to the second clamping surface 10b, and the second extension 1305 engages with the step 231 to restrict the position of the end plate 23 in the second direction. Because the end plate 23 is attached to the battery cell group 2, the engagement between the second extension 1305 and the step 231 can restrict the position of the battery cell group 2.

[0145] Optionally, in some embodiments, the step 231 may include a first step surface 231a and a second step surface 231b that are connected to each other, and the second step surface 231b and the first step surface 231a are perpendicular to each other. The first step surface 231a and the first clamping surface 10a face the clamping beam, and the second step surface 231b is for connecting the step surface 231a and the first clamping surface 10a.

[0146] That is, the end plate 23 may include a first step surface 231a, a second step surface 231b, and a first clamping surface 10a, where the first step surface 231a and the first clamping surface 10a face the clamping beam and are connected via the second step surface 231b. The first step surface 231a and the second step surface 231b form a step.

[0147] Optionally, a projection of the first step surface 231a in the first direction does not overlap with a projection of the first fastening surface 10a in the first direction, and a projection of the second step surface 231b in the second direction is within the range of a projection of the end plate 23 in the second direction.

[0148] In the embodiment of the present application, the wedge-shaped member 13 is attached to the step 231 on the end plate 23 via the second extension portion 1305, and by restricting the positions of the end plate 23 and the battery cell group 2, the mounting stability of the battery cell group 2 within the housing can be improved.

[0149] It should be noted that, when an end plate is provided, the end plate is typically attached onto a battery cell. If there are multiple battery cells, the end plate is attached to one side of the battery cells. Therefore, in some embodiments, the end plate may be considered to be part of the battery cell group 2.

[0150] 14 shows a partial structural schematic diagram of another battery according to an embodiment of the present application. Unlike the battery shown in FIG. 13, the wedge-shaped member 13 further includes a first extension 1304 extending from the third surface 1303 along a first direction away from the battery cell group 2, and the first extension 1304 is for connecting to the fastening beam. The first extension 1304 shown in FIG. 14 is the same as the first extension 1304 introduced in FIG. 12, and for detailed description, please refer to the relevant description of FIG. 12. For brevity, the description will be omitted here.

[0151] Optionally, in some embodiments, the battery 10 may further include busbar members 24 for electrically connecting to the plurality of battery cells 20. The busbar members 24 are installed at the ends of the battery cell group 2 in the third direction, the third direction being parallel to the extension direction of the fastening beams, and the extension direction of the fastening beams being perpendicular to the first direction.

[0152] For ease of understanding, FIG. 15 is a partial perspective schematic view of the battery in FIG. 14 . As shown in FIG. 15 , the battery 10 includes a first beam 101 and a second beam 102 spaced apart along a first direction, and a battery cell group 2 disposed between the first beam 101 and the second beam 102. The first beam 101 and / or the second beam 102 are fastening beams. The battery cell group 2 includes a plurality of battery cells 20 stacked along the first direction. End plates 23 are attached to both sides of the plurality of battery cells 20, and a step 231, as shown in FIG. 14 , is provided on the side of the end plates 23 facing the fastening beams. The above-mentioned wedge-shaped gap 12 is present between the end plates 23 and the fastening beams. The battery 10 further includes a wedge-shaped member 13 for filling the wedge-shaped gap 12 between the end plates 23 and the fastening beams. The wedge-shaped member 13 has a first extension 1304 and a second extension 1305 as shown in FIG. 14, where the first extension 1304 is for connecting to the clamping beam and the second extension 1305 is for engaging with the step 231 on the end plate 23 to limit the position of the end plate 23.

[0153] Optionally, in one embodiment, the assembly process for the battery shown in FIG. 15 is as follows.

[0154] Step 1) Assembling a plurality of battery cells 20 outside the housing 11 to form a battery cell group 2, in which end plates 23 are attached to both sides of the plurality of battery cells 20, and steps 231 are provided on the outer sides of the end plates 23; Step 2) The battery cell group 2 is placed in the housing 11 and disposed between the first beam 101 and the second beam 102, where the step 231 on the end plate 23 faces the fastening beam (the fastening beam is the first beam 101 and / or the second beam 102); Step 3) The wedge-shaped member 13 is pushed into the wedge-shaped gap 12 between the fastening beam and the battery cell group 2, where the second extension portion 1305 of the wedge-shaped member 13 engages with the step 231; Step 4) The first extension 1304 of the wedge-shaped member 13 is fixed to the clamping beam, and the first extension 1304 and the clamping beam are clamped together, for example, by bolting.

[0155] It should be noted that although FIGS. 11-14 are illustrated with the first beam 101 being a fastening beam as an example, it should be understood that the plans described in FIGS. 11-14 are equally applicable to the case where the second beam 102 is a fastening beam, and for the sake of brevity, the description will be omitted.

[0156] FIG. 16 is a schematic plan view of a battery according to an embodiment of the present application, illustrating the installation positions of the first beam and the second beam.

[0157] Optionally, as shown in FIG. 16(a), in some embodiments, the first beam 101 and the second beam 102 are side walls of the housing 11.

[0158] Optionally, in some other embodiments, the first beam 101 and the second beam 102 are beams within the housing 11, as shown in FIG. 16(b).

[0159] Optionally, in some other embodiments, as shown in (c) of FIG. 16, one of the first beam 101 and the second beam 102 is a side wall of the housing 11, and the other is a beam located within the housing 11.

[0160] Optionally, when the clamping beam (i.e., first beam 101 and / or second beam 102) is a beam, the clamping beam may be for separating and fixing two battery cell groups, for example, separating a first battery cell group from a second battery cell group. Optionally, a surface of the clamping beam facing the first battery cell group may be inclined away from the first battery cell group with respect to the first direction, and / or a surface of the first battery cell group facing the clamping beam may be inclined away from the clamping beam with respect to the first direction. A surface of the clamping beam facing the second battery cell group may be inclined away from the second battery cell group with respect to the first direction, and / or a surface of the second battery cell group facing the clamping beam may be inclined away from the clamping beam with respect to the first direction. Therefore, a wedge-shaped gap can be formed between the first battery cell group and the clamping beam, and a wedge-shaped gap can be formed between the second battery cell group and the clamping beam, so that the first battery cell group and the second battery cell group can be clamped by the same clamping beam.

[0161] In the embodiment of the present application, the structures of the first beam 101 and the first beam 102 may be the same or different, and are not particularly limited here.

[0162] Optionally, in the embodiments of the present application, the first beam 101 and / or the second beam 102 may be a solid beam, a hollow beam, or an openwork beam. If the first beam 101 and / or the second beam 102 are a hollow beam or an openwork beam, the weight of the entire battery can be reduced.

[0163] The above describes the battery cell, battery, and power consuming device according to the embodiments of the present application. The following describes a method and device for manufacturing the battery cell according to the embodiments of the present application. Here, reference can be made to the above embodiments for parts not described in detail.

[0164] 17 shows a schematic flow chart of a method 300 for manufacturing the battery 10 according to one embodiment of the present application. As shown in FIG. 17, the method 300 may include:

[0165] S310, providing a battery cell group 2.

[0166] S320, providing the housing 11.

[0167] Here, the battery cell group 2 includes a plurality of battery cells 20 arranged along a first direction. The housing 11 includes a first beam 101 and a second beam 102 spaced apart along the first direction, and the battery cell group 2 is disposed between the first beam 101 and the second beam 102, where at least one of the first beam 101 and the second beam 102 is a clamping beam, and a wedge-shaped gap 12 is present between the clamping beam and the battery cell group 2.

[0168] S330, providing the wedge-shaped member 13;

[0169] In step S340, the wedge-shaped member 13 is filled into the wedge-shaped gap 12 to fasten the battery cell group 2 to the housing 11.

[0170] 18 is a schematic block diagram of an apparatus 400 for manufacturing a battery 10 according to an embodiment of the present application. As shown in FIG. 18 , the apparatus 400 may include a providing module 410 for providing a battery cell group 2 including a plurality of battery cells 20 arranged along a first direction, a housing 11 including first beams 101 and second beams 102 spaced apart along the first direction, the battery cell group 2 being disposed between the first beams 101 and the second beams 102, where at least one of the first beams 101 and the second beams 102 is a clamping beam, and a wedge-shaped gap 12 is formed between the clamping beam and the battery cell group 2, and the providing module 410 for providing a wedge-shaped member 13, and an attachment module 420 for filling the wedge-shaped member 13 into the wedge-shaped gap 12 to clamp the battery cell group 2 to the housing 11.

[0171] Although the present application has been described with reference to preferred embodiments, various improvements may be made thereto, and elements therein may be replaced with equivalents, without departing from the scope of the present application. In particular, as long as there is no structural contradiction, any of the technical features mentioned in each embodiment may be combined in any manner. The present application is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims. [Explanation of symbols]

[0172] 1 vehicle 10 batteries 11. Housing 111 First Part 112 Second Part 101 First Beam 102 Second Beam 10a First clamping surface 10b Second clamping surface 10c Third clamping surface 12 Wedge-shaped gap 121 First Wedge Gap 122 Second wedge gap 13 Wedge-shaped member 131 First wedge-shaped member 132 Second wedge-shaped member 1301 First page 1302 Second Side 1303 Third Side 1304 First extension 1305 Second extension 2 battery cell group 20 battery cells 201 The First Wall 202 Second Wall 211 cases 212a first cover plate 212b second cover plate 213 Pressure relief mechanism 214 Electrode terminal 215a First protective layer 215b Second protective layer 216a First holder 22 Electrode Assembly 221 First Tab 23 End plate 231 Step 231a First step surface 231b Second step surface 24 Busbar components 30 Controllers 40 Motor

Claims

1. A battery (10), a battery cell group (2) including a plurality of battery cells (20) arranged along a first direction; a housing (11) including a first beam (101) and a second beam (102) spaced apart along the first direction, the battery cell group (2) being installed between the first beam (101) and the second beam (102), wherein at least one of the first beam (101) and the second beam (102) is a clamping beam, and a wedge-shaped gap (12) is present between the clamping beam and the battery cell group (2); a wedge-shaped member (13) for filling the wedge-shaped gap (12) and fastening the battery cell group (2) to the housing (11); The wedge-shaped member (13) includes a first surface (1301) and a second surface (1302) that are disposed opposite to each other, wherein the first surface (1301) is parallel to and faces a surface of the battery cell group (2) that faces the fastening beam, and the second surface (1302) is parallel to and faces a surface of the fastening beam that faces the battery cell group (2); The battery (10) The battery pack further includes an end plate (23) that is installed between the fastening beam and the battery cell group (2) and attached to the battery cell group (2), wherein a step (231) is installed on the side of the end plate (23) facing the fastening beam; Here, the wedge-shaped member (13) is a third surface (1303) connecting the first surface (1301) and the second surface (1302); a second extension portion (1305) extending from the third surface (1303) along the first direction toward the battery cell group (2), wherein the second extension portion (1305) engages with the step (231) to restrict the position of the end plate (23) in the second direction, wherein the second direction is perpendicular to the first direction and perpendicular to the extension direction of the clamping beam, and the extension direction of the clamping beam is perpendicular to the first direction.

2. 2. The battery (10) according to claim 1, characterized in that the wedge-shaped member (13) is fixed to the clamping beam.

3. The battery (10) according to claim 1 or 2, characterized in that the surface of the fastening beam facing the battery cell group (2) is installed at an angle away from the battery cell group (2) with respect to the first direction.

4. 4. The battery (10) of claim 3, wherein the clamping beam is a trapezoidal beam.

5. The battery (10) according to any one of claims 1 to 4, characterized in that a surface of the battery cell group (2) facing the fastening beam is installed at an angle away from the fastening beam with respect to the first direction.

6. The battery (10) according to any one of claims 3 to 5, characterized in that an included angle between a surface of the fastening beam facing the battery cell group (2) and a surface of the battery cell group (2) facing the fastening beam is greater than 0° and less than 90°.

7. The wedge-shaped member (13) is a third surface (1303) connecting the first surface (1301) and the second surface (1302); 2. The battery (10) of claim 1, further comprising a first extension (1304) extending from the third surface (1303) along the first direction away from the battery cell group (2), wherein the first extension (1304) is connected to the fastening beam.

8. The battery (10) The battery (10) according to any one of claims 1 to 7, further comprising a busbar member (24) for electrically connecting to the plurality of battery cells (20), the busbar member (24) being installed at an end of the battery cell group (2) in a third direction, the third direction being parallel to an extension direction of the fastening beam, and the extension direction of the fastening beam being perpendicular to the first direction.

9. The battery (10) according to any one of claims 1 to 7, characterized in that the first beam (101) and the second beam (102) are side walls of the housing (11).

10. 10. An electrical power consuming device comprising a battery (10) according to any one of claims 1 to 9, wherein the battery (10) is for providing electrical energy to the electrical power consuming device.

11. A method of manufacturing a battery (10), comprising: Providing a battery cell group (2) including a plurality of battery cells (20) arranged along a first direction; providing a housing (11) including a first beam (101) and a second beam (102) spaced apart along the first direction, the battery cell group (2) being installed between the first beam (101) and the second beam (102), wherein at least one of the first beam (101) and the second beam (102) is a clamping beam, and a wedge-shaped gap (12) is formed between the clamping beam and the battery cell group (2); Providing a wedge-shaped member (13); and filling the wedge-shaped member (13) into the wedge-shaped gap (12) to fasten the battery cell group (2) to the housing (11). The wedge-shaped member (13) includes a first surface (1301) and a second surface (1302) that are disposed opposite to each other, wherein the first surface (1301) is parallel to and faces a surface of the battery cell group (2) that faces the fastening beam, and the second surface (1302) is parallel to and faces a surface of the fastening beam that faces the battery cell group (2); The battery (10) The battery pack further includes an end plate (23) that is installed between the fastening beam and the battery cell group (2) and attached to the battery cell group (2), wherein a step (231) is installed on the side of the end plate (23) facing the fastening beam; Here, the wedge-shaped member (13) is a third surface (1303) connecting the first surface (1301) and the second surface (1302); and a second extension portion (1305) extending from the third surface (1303) along the first direction toward the battery cell group (2), wherein the second extension portion (1305) engages with the step (231) to restrict the position of the end plate (23) in the second direction, wherein the second direction is perpendicular to the first direction and perpendicular to the extension direction of the clamping beam, and the extension direction of the clamping beam is perpendicular to the first direction.

12. An apparatus for manufacturing a battery (10), comprising: A battery cell group (2) including a plurality of battery cells (20) arranged along a first direction is provided; a housing (11) including a first beam (101) and a second beam (102) spaced apart along the first direction, the battery cell group (2) being disposed between the first beam (101) and the second beam (102), wherein at least one of the first beam (101) and the second beam (102) is a clamping beam, and a wedge-shaped gap (12) is formed between the clamping beam and the battery cell group (2); a providing module for providing a wedge-shaped member (13); and an attachment module for fastening the battery cell group (2) to the housing (11) by filling the wedge-shaped member (13) into the wedge-shaped gap (12), The wedge-shaped member (13) includes a first surface (1301) and a second surface (1302) that are disposed opposite to each other, wherein the first surface (1301) is parallel to and faces a surface of the battery cell group (2) that faces the fastening beam, and the second surface (1302) is parallel to and faces a surface of the fastening beam that faces the battery cell group (2); The battery (10) The battery pack further includes an end plate (23) that is installed between the fastening beam and the battery cell group (2) and attached to the battery cell group (2), wherein a step (231) is installed on the side of the end plate (23) facing the fastening beam; Here, the wedge-shaped member (13) is a third surface (1303) connecting the first surface (1301) and the second surface (1302); and a second extension portion (1305) extending from the third surface (1303) along the first direction toward the battery cell group (2), wherein the second extension portion (1305) engages with the step (231) to restrict the position of the end plate (23) in the second direction, wherein the second direction is perpendicular to the first direction and perpendicular to the extension direction of the fastening beam, and the extension direction of the fastening beam is perpendicular to the first direction.

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