Battery and electric device

Abstract

The application provides a battery (100) and a power consumption device, and belongs to the technical field of batteries. The battery (100) comprises a box body (10), a first battery monomer group (201), a second battery monomer group (202), a partition beam (30), a connecting member (40) and a fixing seat (50); the first battery monomer group (201) and the second battery monomer group (202) are arranged in the box body (10) and are arranged along a first direction; the partition beam (30) is arranged between the first battery monomer group (201) and the second battery monomer group (202); the first battery monomer group (201) and the second battery monomer group (202) are electrically connected through the connecting member (40); the fixing seat (50) is arranged on the partition beam (30); and the connecting member (40) is fixed on the fixing seat (50). The battery (100) has high safety.

Description

Technical Field

[0001] This application relates to the field of battery technology, and more specifically, to a battery and an electrical device. Background Technology

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

[0003] In the development of battery technology, in addition to improving battery energy density, safety is also an issue that cannot be ignored. Therefore, how to improve battery safety is a technical problem that urgently needs to be solved in battery technology. Summary of the Invention

[0004] The purpose of this application is to provide a battery and an electrical device, wherein the battery has high safety.

[0005] This application is achieved through the following technical solution:

[0006] In a first aspect, this application provides a battery, which includes a housing, a first battery cell group, a second battery cell group, a partition beam, a connecting member, and a fixing seat; the first battery cell group and the second battery cell group are disposed in the housing and arranged along a first direction; the partition beam is disposed between the first battery cell group and the second battery cell group; the first battery cell group and the second battery cell group are electrically connected by the connecting member; the fixing seat is disposed on the partition beam; wherein, the connecting member is fixed to the fixing seat.

[0007] According to the battery embodiment of this application, the connecting member is fixed to the fixed seat, and the fixed seat is disposed on the partition beam, so that the movement of the connecting member is constrained by the fixed seat, which improves the connection reliability between the connecting member and the battery cell group, reduces the risk of damage to the connection between the connecting member and the battery cell group due to the movement of the connecting member, and thus makes the battery have higher safety.

[0008] According to some embodiments of this application, the mounting base includes a first mounting groove, and a portion of the connecting member is disposed within the first mounting groove.

[0009] In the above scheme, when a part of the connecting member is disposed in the first mounting groove, the fixed seat can constrain the movement of the connecting member.

[0010] According to some embodiments of this application, the first mounting groove includes a first groove side and a second groove side disposed opposite to each other, and a portion of the connecting member is sandwiched between the first groove side and the second groove side.

[0011] In the above scheme, a portion of the connecting member is clamped by the first groove side and the second groove side, so that the movement of the connecting member is restricted by the first groove side and the second groove side, thereby making the connection between the connecting member and the first battery cell group and the second battery cell group reliable.

[0012] According to some embodiments of this application, at least one of the first groove side and the second groove side is provided with a protrusion, which abuts against the connecting member.

[0013] In the above scheme, the protrusion abuts against the connecting member to increase the difficulty of moving the connecting member relative to the fixed base.

[0014] According to some embodiments of this application, the first mounting groove further includes a first groove bottom surface, the first groove bottom surface is connected to the first groove side surface and the second groove side surface, and the first groove bottom surface supports the connecting member.

[0015] In the above scheme, the bottom surface of the first groove, the side surface of the first groove, and the side surface of the second groove together constrain the connecting member. The connecting member and the fixed base are stably matched, making it difficult for the connecting member to move relative to the fixed base. This makes the connection between the connecting member and the first battery cell group and the second battery cell group more reliable.

[0016] According to some embodiments of this application, along the direction away from the bottom surface of the first groove, the connecting member does not extend beyond the end of the side surface of the first groove that is away from the bottom surface of the first groove, and / or, the connecting member does not extend beyond the end of the side surface of the second groove that is away from the bottom surface of the first groove.

[0017] In the above scheme, when the connecting member does not extend beyond the end of the first groove side away from the bottom surface of the first groove, the first groove side has a good shielding effect on the connecting member, reducing the risk of short circuit due to contact between the connecting member and other components; when the connecting member does not extend beyond the end of the second groove side away from the bottom surface of the first groove, the second groove side has a good shielding effect on the connecting member, reducing the risk of short circuit due to contact between the connecting member and other components; when the connecting member does not extend beyond the end of the first groove side away from the bottom surface of the first groove and the end of the second groove side away from the bottom surface of the first groove, the connecting member is shielded by the first groove side and the second groove side, and the first groove side and the second groove side have a protective effect on the connecting member, reducing the risk of short circuit due to contact between the connecting member and other components.

[0018] According to some embodiments of this application, the first groove side and the second groove side are disposed opposite to each other along a second direction, and the second direction intersects with the first direction.

[0019] In the above scheme, the first groove side and the second groove side limit the movement of the connecting member along the second direction, so that the connection between the connecting member and the first battery cell group and the second battery cell group is stable, reducing the risk of damage to the connection between the connecting member and the first battery cell group and the connection between the connecting member and the second battery cell group.

[0020] According to some embodiments of this application, the fixing seat includes a second mounting groove, the second mounting groove includes a third groove side and a fourth groove side disposed opposite to each other along a first direction, and at least a portion of the partition beam is sandwiched between the third groove side and the fourth groove side.

[0021] In the above scheme, the second mounting groove is used to accommodate the partition beam, and at least a portion of the partition beam is clamped by the side of the third groove and the side of the fourth groove to facilitate the assembly of the fixing seat and the partition beam, so that the connection between the fixing seat and the partition beam is stable.

[0022] According to some embodiments of this application, the inner surface of the second mounting groove is bonded to the outer surface of the partition beam.

[0023] In the above scheme, the inner surface of the second mounting groove is bonded to the outer surface of the partition beam, so that the fixed seat is firmly connected to the partition beam, reducing the risk of the fixed seat moving relative to the partition beam.

[0024] According to some embodiments of this application, the box body includes a bottom wall and a side wall, the side wall surrounds the bottom wall, and a partition beam is disposed on the bottom wall. The partition beam extends along a second direction, and the second direction, the first direction, and the thickness direction of the bottom wall intersect each other.

[0025] In the above scheme, the partition beam is set on the bottom wall of the box to facilitate the connection between the partition beam and the box body. The partition beam extends along the second direction, so that the partition beam has a large shielding area for the first battery cell group and the second battery cell group, so that the partition beam can separate the first battery cell group and the second battery cell group and reduce the risk of short circuit between the first battery cell group and the second battery cell group.

[0026] According to some embodiments of this application, the partition beam includes a top surface away from the bottom wall of the box, and the partition beam is provided with a first recess recessed from the top surface toward the bottom wall of the box, and at least a portion of the fixing seat is disposed in the first recess.

[0027] In the above scheme, the first recess provides space for the fixing seat. At least part of the fixing seat is disposed in the first recess, which can reduce the space occupied in the thickness direction of the bottom wall of the box after the fixing seat and the partition beam are assembled, reduce the impact of the fixing seat on the space utilization rate of the box, and make the battery have a higher energy density.

[0028] According to some embodiments of this application, the battery further includes an insulating member connected to a separator beam to isolate the separator beam from the first battery cell group and from the second battery cell group, and a mounting base connected to the insulating member.

[0029] In the above scheme, the insulating component is connected to the partition beam, and the insulating component and the partition beam have a large connection area, which facilitates the isolation of the first battery cell group and the second battery cell group and reduces the risk of short circuit between the first battery cell group and the second battery cell group.

[0030] According to some embodiments of this application, the insulating element includes a first sidewall and a second sidewall, which are respectively disposed on both sides of the partition beam along a first direction.

[0031] In the above scheme, the first sidewall and the second sidewall are respectively provided on both sides of the partition beam along the first direction, which facilitates the assembly of the insulating component with the partition beam and enables the first battery cell group and the second battery cell group to have a better insulation effect.

[0032] According to some embodiments of this application, the insulating element further includes a connecting wall disposed on the side of the partition beam away from the bottom wall of the box, and the connecting wall connects the first side wall and the second side wall.

[0033] In the above scheme, the connecting wall connects the first side wall and the second side wall to increase the strength of the insulating component, so as to facilitate the connection between the insulating component and the partition beam.

[0034] According to some embodiments of this application, the mounting base and the insulating component are integrally formed.

[0035] In the above solution, the fixing base and the insulating component are integrally formed, which makes the connection between the fixing base and the insulating component firm and facilitates processing and manufacturing.

[0036] According to some embodiments of this application, the fixing base is located at one end of the insulating member along the second direction.

[0037] In the above scheme, the fixing base and the insulating component are arranged along the second direction. The setting direction of the fixing base and the insulating component is parallel to the extension direction of the partition beam. On the one hand, it is convenient for the fixing base and the insulating component to have a large connection area with the partition beam respectively. On the other hand, it makes reasonable use of the space in the extension direction of the partition beam, improves the space utilization rate inside the box, and makes the battery have a high energy density.

[0038] According to some embodiments of this application, both the first battery cell group and the second battery cell group include a plurality of battery cells stacked along a first direction.

[0039] In the above scheme, multiple battery cells in the first battery cell group and the second battery cell group are stacked along the first direction. On the one hand, this facilitates the electrical connection between the first battery cell group and the second battery cell group. On the other hand, the space utilization rate of the housing in the first direction is relatively high.

[0040] According to some embodiments of this application, a battery cell includes a housing and electrode terminals. The housing has a first wall perpendicular to a first direction. The electrode terminals are mounted on the first wall and have a first surface. The plane of the first surface intersects the first wall. One end of a connecting member is connected to the first surface of the electrode terminal of the battery cell closest to the separator beam in the first battery cell group, and the other end of the connecting member is connected to the first surface of the electrode terminal of the battery cell closest to the separator beam in the second battery cell group.

[0041] In the above scheme, the electrode terminals are disposed on the first wall of the housing perpendicular to the first direction, so as to facilitate the connection between multiple battery cells, and the connection between the first battery cell group and the second battery cell group and the connecting member.

[0042] According to some embodiments of this application, the connecting member includes a base wall, two end walls, and two flanges. The two end walls are disposed opposite each other along a first direction. The base wall connects the two end walls. Each flange extends from the end of the corresponding end wall away from the base wall in a direction away from the other end wall. One flange is connected to the first surface of the electrode terminal of the battery cell closest to the separator beam in the first battery cell group, and the other flange is connected to the first surface of the electrode terminal of the battery cell closest to the separator beam in the second battery cell group.

[0043] In the above scheme, the structural form of the connecting member gives it high strength. The flange is connected to the first surface of the electrode terminal, which can reduce the space occupied in the first direction and improve the space utilization of the box in the first direction.

[0044] According to some embodiments of this application, the fixing base includes a first mounting groove, the first mounting groove includes a first groove side and a second groove side disposed opposite to each other, and the base wall is sandwiched between the first groove side and the second groove side.

[0045] In the above scheme, the base wall is sandwiched between the first groove side and the second groove side, so that the movement of the base wall is restricted by the first groove side and the second groove side, thereby making the connection between the connecting member and the first battery cell group and the second battery cell group reliable.

[0046] According to some embodiments of this application, the base wall includes a second surface and a third surface disposed opposite to each other, two end walls protruding from the second surface, a first groove side surface disposed opposite to the second surface, and a second groove side surface disposed opposite to the third surface; the projection of the first groove side surface onto the second surface along the first direction has a dimension L1, and the projection of the second groove side surface onto the third surface along the first direction has a dimension L2, satisfying that L1 < L2.

[0047] In the above scheme, the base wall and the side of the second groove have a large overlapping area, so that the fixing seat can have a better constraint effect on the connecting component; at the same time, the two end walls protrude from the second surface, and the side of the first groove is set opposite to the second surface, reducing the risk of assembly interference between the fixing seat and the connecting component.

[0048] According to some embodiments of this application, the first wall of the battery cells in the first battery cell group is disposed facing the partition beam, and the first wall of the battery cells in the second battery cell group is disposed away from the partition beam.

[0049] In the above scheme, the arrangement of multiple battery cells in the first battery cell group is the same as that in the second battery cell group, which facilitates the cooperation between the first and second battery cell groups and the housing.

[0050] According to some embodiments of this application, the mounting base further includes a third mounting groove in which a portion of the electrode terminals of the battery cell closest to the separator beam in the first battery cell group are located.

[0051] In the above scheme, a portion of the electrode terminal of the battery cell closest to the separator beam in the first battery cell group is located in the third mounting groove, which reduces the space occupied by the structure after the connecting member is connected to the electrode terminal in the first direction, makes reasonable use of the internal space of the box, and enables the battery to have a high energy density.

[0052] According to some embodiments of this application, the outer shell includes a first wall and a second wall disposed opposite to each other along a first direction, a third wall and a fourth wall disposed opposite to each other along a second direction, and a fifth wall and a sixth wall disposed opposite to each other along a third direction. The areas of the third wall and the fourth wall are both smaller than the area of ​​the first wall, the areas of the third wall and the fourth wall are both smaller than the area of ​​the second wall, the areas of the fifth wall and the sixth wall are both smaller than the area of ​​the first wall, and the areas of the fifth wall and the sixth wall are both smaller than the area of ​​the second wall. The first direction, the second direction and the third direction intersect each other.

[0053] In the above scheme, the first wall and the second wall are the walls with larger areas of the outer shell, and multiple battery cells are stacked along a first direction perpendicular to the first wall, so that the first battery cell group and the second battery cell group have a compact structure, and the battery has a high energy density.

[0054] According to some embodiments of this application, the housing also has a second wall disposed opposite to the first wall, and a second recess is formed in a first region of the edge of the second wall, the second recess being used to accommodate the electrode terminals of the battery cell adjacent to the second wall.

[0055] In the above scheme, the second recess can accommodate the electrode terminals of the battery cells adjacent to the second wall, making the battery cell group structure compact and thus enabling the battery to have a high energy density.

[0056] Secondly, this application also provides an electrical device, including the battery provided in any of the above embodiments.

[0057] The above description is only an overview of the technical solution of this application. In order to better understand the technical means of this application and to implement it in accordance with the contents of the specification, and to make the above and other objects, features and advantages of this application more obvious and understandable, the following are specific embodiments of this application. Attached Figure Description

[0058] To more clearly illustrate the technical solutions of the embodiments of this application, the drawings used in the embodiments of this application will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on the drawings without creative effort.

[0059] Figure 1 This application provides structural schematic diagrams of vehicles for some embodiments;

[0060] Figure 2 Exploded views of batteries provided for some embodiments of this application;

[0061] Figure 3 This application provides schematic diagrams of the battery structure for some embodiments.

[0062] Figure 4 A partial schematic diagram of a battery provided for some embodiments of this application;

[0063] Figure 5 This is a partial structural schematic diagram of a battery provided in some embodiments of this application;

[0064] Figure 6 This is a schematic diagram of the structure of the fixing base provided in some embodiments of this application;

[0065] Figure 7 This is a schematic diagram illustrating the fit between the connecting member and the mounting groove provided in some embodiments of this application;

[0066] Figure 8 Cross-sectional views of a portion of the battery structure provided in some embodiments of this application;

[0067] Figure 9 This is a partial structural schematic diagram of a battery provided in some embodiments of this application;

[0068] Figure 10 Schematic diagrams of the fixture, insulating component, and busbar provided in some embodiments of this application;

[0069] Figure 11 for Figure 10 A magnified view of part A;

[0070] Figure 12 This is a partial structural schematic diagram of a battery provided in some embodiments of this application;

[0071] Figure 13 This is a schematic diagram illustrating the fit between the electrode terminals and the first wall according to some embodiments of this application.

[0072] The accompanying drawings are not drawn to scale.

[0073] Marking Explanation: 100-Battery; 10-Box; 11-First Sub-Box; 111-Box Bottom Wall; 112-Box Side Wall; 12-Second Sub-Box; 201-First Battery Cell Group; 202-Second Battery Cell Group; 21-Battery Cell; 211-Outer Shell; 2111-First Wall; 2112-Second Wall; 2113-Second Recess; 212-Electrode Terminal; 2121-First Surface; 30-Separating Beam; 31-Top Surface; 32-First Recess; 40-Connecting Member; 41-Base Wall; 4 11-Second surface; 412-Third surface; 42-End wall; 43-Flanged portion; 50-Fixing seat; 51-First mounting groove; 511-Side side of first groove; 512-Side side of second groove; 513-Protrusion; 514-Bottom surface of first groove; 52-Second mounting groove; 521-Side side of third groove; 522-Side side of fourth groove; 53-Third mounting groove; 60-Insulating component; 61-First side wall; 62-Second side wall; 63-Connecting wall; 200-Controller; 300-Motor; 1000-Vehicle. Detailed Implementation

[0074] The embodiments of this application will be described in further detail below with reference to the accompanying drawings and examples. The detailed description of the following embodiments and the accompanying drawings are used to illustrate the principles of this application by way of example, but should not be used to limit the scope of this application, that is, this application is not limited to the described embodiments.

[0075] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains; the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the application; the terms “comprising” and “having”, and any variations thereof, in the specification, claims, and foregoing description of the drawings are intended to cover non-exclusive inclusion.

[0076] The terms "first," "second," etc., in the specification, claims, or the accompanying drawings of this application are used to distinguish different objects, rather than to describe a specific order or primary / secondary relationship.

[0077] In this application, the reference to "embodiment" means that a specific feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a mutually exclusive, independent, or alternative embodiment. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described in this application can be combined with other embodiments.

[0078] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," and "attachment" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal communication between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0079] In this application, the term "and / or" is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent three possibilities: A exists, A and B exist simultaneously, and B exists. Additionally, in this application, the character " / " generally indicates that the preceding and following related objects have an "or" relationship.

[0080] In this application, "multiple" refers to two or more (including two), and similarly, "multiple groups" refers to two or more (including two), and "multiple pieces" refers to two or more (including two).

[0081] The development of battery technology must take into account multiple design factors, such as energy density, discharge capacity, charge-discharge rate and other performance parameters. In addition, battery assembly efficiency also needs to be considered.

[0082] A battery cell pack consists of multiple battery cells stacked and electrically connected, with a compact structure that occupies less assembly space.

[0083] The battery includes a housing, a partition beam, and battery cell packs. The partition beam and battery cell packs are housed within the housing. The partition beam divides the internal space of the housing into multiple compartments, each containing battery cell packs and other components (such as wiring harnesses). In some embodiments, battery cell packs are located on both sides of the partition beam. These two battery cell packs are electrically connected by a connecting member, which is typically suspended, i.e., located above the partition beam. Both ends of the connecting member are connected to the two battery cell packs respectively. In this case, the connecting member only connects to two battery cell packs, resulting in poor reliability of the connection between the connecting member and the battery cell packs. When the battery is subjected to vibration, the connection between the connecting member and the battery cell packs is easily damaged, potentially leading to safety risks.

[0084] In view of this, in order to solve the problem of poor battery safety caused by poor connection reliability between the connecting component and the battery cell pack, the inventors, after in-depth research, designed a technical solution that improves battery safety by fixing the connecting component to the fixed base, restricting the movement of the connecting component, reducing the risk of damage to the connection between the connecting component and the battery cell pack caused by the movement of the connecting component.

[0085] In this type of battery, the mounting base is set on the partition beam, and the connecting member is fixed to the mounting base. The connecting member and the partition beam are stably assembled. When the battery is subjected to vibration, the connecting member can be constrained by the mounting base, and the connecting member is difficult to move relative to the partition beam. This reduces the risk of damage to the connection between the connecting member and the battery cell, thus giving the battery a high level of safety.

[0086] The batteries disclosed in this application can be used, but are not limited to, in electrical equipment such as vehicles, ships, or aircraft. A power system for such electrical equipment can be constructed using batteries disclosed in this application.

[0087] This application provides an electrical device that uses a battery as a power source. The electrical device can be, but is not limited to, mobile phones, tablets, laptops, electric toys, power tools, electric bicycles, electric motorcycles, electric cars, ships, spacecraft, etc. Electric toys can include stationary or mobile electric toys, such as game consoles, electric car toys, electric ship toys, and electric airplane toys, etc. Spacecraft can include airplanes, rockets, space shuttles, and spacecraft, etc.

[0088] For ease of explanation, the following embodiments will be described using a vehicle 1000 as an example of an electrical device according to an embodiment of this application.

[0089] Please refer to Figure 1 , Figure 1 This is a schematic diagram of the structure of a vehicle provided in some embodiments of this application. The vehicle 1000 can be a gasoline-powered vehicle, a natural gas-powered vehicle, or a new energy vehicle. New energy vehicles can be pure electric vehicles, hybrid electric vehicles, or range-extended electric vehicles, etc. A battery 100 is disposed inside the vehicle 1000, and the battery 100 can be located at the bottom, front, or rear of the vehicle 1000. The battery 100 can be used to power the vehicle 1000; for example, the battery 100 can serve as the operating power source for the vehicle 1000's electrical system, such as meeting the power requirements for starting, navigation, and operation of the vehicle 1000.

[0090] The vehicle 1000 may also include a controller 200 and a motor 300. The controller 200 is used to control the battery 100 to supply power to the motor 300, for example, for the power needs of the vehicle 1000 during startup, navigation and driving.

[0091] In some embodiments of this application, the battery 100 can not only serve as the operating power source for the vehicle 1000, but also as the driving power source for the vehicle 1000, replacing or partially replacing fuel or natural gas to provide driving power for the vehicle 1000.

[0092] Please refer to Figure 2 , Figure 2 This is an exploded view of a battery provided in some embodiments of this application. The battery 100 includes a housing 10 and battery cells 21, with the battery cells 21 housed within the housing 10.

[0093] The housing 10 provides a space for housing the battery cell 21, and the housing 10 can adopt various structures. In some embodiments, the housing 10 may include a first sub-housing 11 and a second sub-housing 12, which overlap each other, and together define a space for housing the battery cell 21. The first sub-housing 11 may be a hollow structure with one end open, and the second sub-housing 12 may be a plate-like structure, with the first sub-housing 11 covering the open side of the second sub-housing 12, so that the first sub-housing 11 and the second sub-housing 12 together define the space; the first sub-housing 11 and the second sub-housing 12 may also be hollow structures with one side open, with the open side of the first sub-housing 11 covering the open side of the second sub-housing 12.

[0094] In battery 100, there can be multiple battery cells 21, which can be connected in series, in parallel, or in a mixed manner. A mixed connection means that multiple battery cells 21 are connected in both series and parallel. Battery 100 may also include other structures, such as a busbar component for realizing the electrical connection between multiple battery cells 21.

[0095] Among them, the battery cell 21 can be a secondary battery or a primary battery; the battery cell 21 can also be a lithium-sulfur battery, a sodium-ion battery or a magnesium-ion battery, but is not limited to these.

[0096] Please see Figure 3 , Figure 4 , Figure 3 These are schematic diagrams of the battery structure provided in some embodiments of this application. They are for ease of description. Figure 3 The second sub-box is not shown in the diagram; Figure 4This is a partial schematic diagram of a battery provided in some embodiments of this application. According to some embodiments of this application, a battery 100 is provided, comprising a housing 10, a first battery cell group 201, a second battery cell group 202, a partition beam 30, a connecting member 40, and a fixing base 50. The first battery cell group 201 and the second battery cell group 202 are disposed within the housing 10 and arranged along a first direction X; the partition beam 30 is disposed between the first battery cell group 201 and the second battery cell group 202; the first battery cell group 201 and the second battery cell group 202 are electrically connected via the connecting member 40; the fixing base 50 is disposed on the partition beam 30, wherein the connecting member 40 is fixed to the fixing base 50.

[0097] The housing 10 provides a storage space, in which the first battery cell group 201 and the second battery cell group 202 are disposed, and the housing 10 serves a protective function.

[0098] The first battery cell group 201 includes a plurality of battery cells 21 stacked together, and the second battery cell group 202 includes a plurality of battery cells 21 stacked together. The number of battery cells 21 in the first battery cell group 201 and the number of battery cells 21 in the second battery cell group 202 may be the same or different. The structural form of the battery cells 21 in the first battery cell group 201 may be the same or different from the structural form of the battery cells 21 in the second battery cell group 202.

[0099] The first battery cell group 201, the partition beam 30, and the second battery cell group 202 are arranged along the first direction X within the accommodating space of the housing 10, with the partition beam 30 separating the first battery cell group 201 and the second battery cell group 202.

[0100] The partition beam 30 is a component installed inside the housing 10. The partition beam 30 is used to divide the interior of the housing 10 into multiple spaces, which can respectively accommodate battery cell packs and other components (such as wiring harnesses). At the same time, the partition beam 30 installed inside the housing 10 can also improve the overall strength of the housing 10.

[0101] The material of the partition beam 30 can be the same as or different from that of the box body 10. The partition beam 30 can be made of aluminum, aluminum alloy, stainless steel, etc., and has high strength.

[0102] The fixing seat 50 is a component used to fix the connecting member 40. The fixing seat 50 can be connected to the partition beam 30 in various ways. For example, the fixing seat 50 can be connected to the partition beam 30 by snap-fitting, gluing, riveting, etc. The fixing seat 50 can also be connected to the partition beam 30 by fasteners (such as bolts).

[0103] The connecting member 40 is a component used to realize the electrical connection between the first battery cell group 201 and the second battery cell group 202. The material of the connecting member 40 can be aluminum, copper, etc.

[0104] The connection member 40 being fixed to the fixed base 50 means that the movement of the connection member 40 is constrained by the fixed base 50. For example, the connection member 40 and the fixed base 50 are in a fixed relative position, and the connection member 40 does not move relative to the fixed base 50; or, there is a large frictional force between the connection member 40 and the fixed base 50, making it difficult for the connection member 40 to move relative to the fixed base 50. Optionally, the connection member 40 is fixed to the fixed base 50 by bolts, or the connection member 40 is snapped into the fixed base 50.

[0105] According to the battery 100 of this application embodiment, the connecting member 40 is fixed to the fixing seat 50, and the fixing seat 50 is disposed on the partition beam 30, so that the movement of the connecting member 40 is constrained by the fixing seat 50, which improves the connection reliability between the connecting member 40 and the battery cell group (the first battery cell group 201 and the second battery cell group 202 are collectively referred to as such, hereinafter the same), reduces the risk of damage to the connection between the connecting member 40 and the battery cell group caused by the movement of the connecting member 40, and thus makes the battery 100 have higher safety.

[0106] Please see Figures 5 to 7 , Figure 5 This is a partial structural diagram of a battery provided in some embodiments of this application. Figure 6 This is a schematic diagram of the structure of the fixing seat provided in some embodiments of this application. Figure 7 This is a schematic diagram illustrating the fit between a connecting member and a mounting groove according to some embodiments of this application. According to some embodiments of this application, the fixing base 50 includes a first mounting groove 51, and a portion of the connecting member 40 is disposed within the first mounting groove 51.

[0107] The first mounting groove 51 is a groove of the fixing seat 50 for accommodating the connecting member 40. The first mounting groove 51 provides accommodating space for the connecting member 40, so that a part of the connecting member 40 can be disposed in the first mounting groove 51.

[0108] In the above scheme, when a part of the connecting member 40 is disposed in the first mounting groove 51, the fixed seat 50 is used to constrain the movement of the connecting member 40.

[0109] Please see Figure 6 and Figure 7 According to some embodiments of this application, the first mounting groove 51 includes a first groove side 511 and a second groove side 512 disposed opposite to each other, and a portion of the connecting member 40 is sandwiched between the first groove side 511 and the second groove side 512.

[0110] The first groove side 511 and the second groove side 512 are two surfaces that form the first mounting groove 51. The first groove side 511 and the second groove side 512 can be parallel to the extension direction of the first mounting groove 51.

[0111] The first groove side 511 and the second groove side 512 can be planes. The first groove side 511 and the second groove side 512 can be arranged parallel to the connecting member 40 so that the first groove side 511 and the second groove side 512 have a large contact area.

[0112] A portion of the connecting member 40 is sandwiched between the first groove side 511 and the second groove side 512. The first groove side 511 and the second groove side 512 apply forces to the connecting member 40, such that the portion of the connecting member 40 located between the first groove side 511 and the second groove side 512 is clamped by the first groove side 511 and the second groove side 512.

[0113] In the above scheme, a portion of the connecting member 40 is clamped by the first groove side 511 and the second groove side 512, which restricts the movement of the connecting member 40 by the first groove side 511 and the second groove side 512, making it difficult for the connecting member 40 to move relative to the fixed base 50, thereby making the connection between the connecting member 40 and the first battery cell group 201 and the second battery cell group 202 reliable.

[0114] During the assembly of battery 100, the position of connecting member 40 can be determined first, and after the connecting member 40 is fixed to the fixing base 50, the connecting member 40 is connected to the first battery cell group 201 and the second battery cell group 202 to ensure the connection accuracy between the connecting member 40 and the first battery cell group 201 and the second battery cell group 202.

[0115] Please see Figure 8 , Figure 8 This is a cross-sectional view of a portion of the battery structure provided in some embodiments of this application. Figure 8 The mating state of the connecting member and the first mounting groove is shown. According to some embodiments of this application, at least one of the first groove side surface 511 and the second groove side surface 512 is provided with a protrusion 513, which abuts against the connecting member 40.

[0116] When the first groove side 511 is provided with a protrusion 513, the protrusion 513 is a protruding part provided on the first groove side 511. The protrusion 513 protrudes toward the second groove side 512 and abuts against the connecting member 40, so that the side of the connecting member 40 away from the first groove side 511 can fit against the second groove side 512.

[0117] like Figure 8As shown, when the second groove side 512 is provided with a protrusion 513, the protrusion 513 is a protruding part provided on the second groove side 512. The protrusion 513 protrudes towards the first groove side 511 and abuts against the connecting member 40, so that the side of the connecting member 40 away from the second groove side 512 can fit against the first groove side 511.

[0118] When both the first groove side 511 and the second groove side 512 are provided with protrusions 513, the protrusions 513 located on the first groove side 511 protrude toward the second groove side 512, and the protrusions 513 located on the second groove side 512 protrude toward the first groove side 511. The protrusions 513 abut against the connecting member 40 on opposite sides of the connecting member 40.

[0119] The protrusion 513 abuts against the connecting member 40, and there is a large friction between the connecting member 40 and the fixed seat 50. The fixed seat 50 has a good clamping effect on the connecting member 40.

[0120] In the above scheme, the protrusion 513 abuts against the connecting member 40 to increase the difficulty of moving the connecting member 40 relative to the fixed seat 50.

[0121] Please see Figure 8 According to some embodiments of this application, the first mounting groove 51 further includes a first groove bottom surface 514, which connects the first groove side surface 511 and the second groove side surface 512, and supports the connecting member 40.

[0122] The bottom surface 514 of the first groove, together with the side surface 511 of the first groove and the side surface 512 of the second groove, together form the first mounting groove 51. The connecting member 40 is placed on the bottom surface 514 of the first groove, and the bottom surface 514 of the first groove supports the connecting member 40.

[0123] In the above scheme, the bottom surface 514 of the first groove, the side surface 511 of the first groove, and the side surface 512 of the second groove together constrain the connecting member 40. The connecting member 40 and the fixed seat 50 are stably matched, making it difficult for the connecting member 40 to move relative to the fixed seat 50. This makes the connection between the connecting member 40 and the first battery cell group 201 and the second battery cell group 202 more reliable.

[0124] Please see Figure 4 According to some embodiments of this application, in the direction away from the bottom surface 514 of the first groove, the connecting member 40 does not extend beyond the end of the side surface 511 of the first groove that is away from the bottom surface 514 of the first groove, and / or, the connecting member 40 does not extend beyond the end of the side surface 512 of the second groove that is away from the bottom surface 514 of the first groove.

[0125] Along the direction away from the bottom surface 514 of the first groove, the connecting member 40 has different assembly methods with the side surface 511 of the first groove and the side surface 512 of the second groove. For example, the connecting member 40 does not extend beyond the end of the side surface 511 of the first groove that is away from the bottom surface 514 of the first groove, or the connecting member 40 does not extend beyond the end of the side surface 512 of the second groove that is away from the bottom surface 514 of the first groove, or the connecting member 40 does not extend beyond the end of the side surface 511 of the first groove that is away from the bottom surface 514 of the first groove and the end of the side surface 512 of the second groove that is away from the bottom surface 514 of the first groove.

[0126] In the above scheme, when the connecting member 40 does not extend beyond the end of the first groove side surface 511 that is away from the bottom surface 514 of the first groove, the first groove side surface 511 has a good shielding effect on the connecting member 40, reducing the risk of short circuit due to contact between the connecting member 40 and other components; when the connecting member 40 does not extend beyond the end of the second groove side surface 512 that is away from the bottom surface 514 of the first groove, the second groove side surface 512 has a good shielding effect on the connecting member 40, reducing the risk of short circuit due to contact between the connecting member 40 and other components; when the connecting member 40 does not extend beyond the end of the first groove side surface 511 that is away from the bottom surface 514 of the first groove and the end of the second groove side surface 512 that is away from the bottom surface 514 of the first groove, the connecting member 40 is shielded by the first groove side surface 511 and the second groove side surface 512, and the first groove side surface 511 and the second groove side surface 512 have a protective effect on the connecting member 40, reducing the risk of short circuit due to contact between the connecting member 40 and other components.

[0127] Please see Figure 7 and Figure 8 According to some embodiments of this application, the first groove side 511 and the second groove side 512 are disposed opposite each other along the second direction Y, and the second direction Y intersects the first direction X.

[0128] In the diagram, the direction indicated by the letter Y can be the second direction.

[0129] The second direction Y intersects the first direction X, and the angle between the second direction Y and the first direction X is adjusted according to different needs.

[0130] Optionally, the second direction Y is perpendicular to the first direction X. In the figure, the direction indicated by the letter Y can be the second direction Y.

[0131] The first groove side 511 and the second groove side 512 can be planes perpendicular to the second direction Y. The first groove side 511 and the second groove side 512 limit the movement of the connecting member 40 along the second direction Y, so that the connecting member 40 is stably connected to the first battery cell group 201 and the second battery cell group 202, reducing the risk of damage to the connection between the connecting member 40 and the first battery cell group 201 and the connection between the connecting member 40 and the second battery cell group 202.

[0132] Please see Figure 4 and Figure 6 According to some embodiments of this application, the fixing seat 50 includes a second mounting groove 52, the second mounting groove 52 includes a third groove side 521 and a fourth groove side 522 disposed opposite to each other along a first direction X, and at least a portion of the partition beam 30 is sandwiched between the third groove side 521 and the fourth groove side 522.

[0133] The second mounting groove 52 is a groove of the fixed seat 50 for accommodating the partition beam 30. A portion of the partition beam 30 may be located in the second mounting groove 52, or the entire partition beam 30 may be located in the second mounting groove 52.

[0134] The third groove side surface 521 and the fourth groove side surface 522 are the two surfaces that constitute the second mounting groove 52. The third groove side surface 521 and the fourth groove side surface 522 are arranged opposite to each other along the first direction X, and the third groove side surface 521 and the fourth groove side surface 522 can be planes perpendicular to the first direction X.

[0135] When the partition beam 30 is accommodated in the second mounting groove 52, the third groove side 521 and the fourth groove side 522 have a large contact area with the partition beam 30, and the third groove side 521 and the fourth groove side 522 apply force to the partition beam 30, so that the part of the partition beam 30 located between the third groove side 521 and the fourth groove side 522 is clamped by the third groove side 521 and the fourth groove side 522.

[0136] In the above scheme, the second mounting groove 52 is used to accommodate the partition beam 30. At least a portion of the partition beam 30 is clamped by the third groove side 521 and the fourth groove side 522 to facilitate the assembly of the fixing seat 50 and the partition beam 30, so that the connection between the fixing seat 50 and the partition beam 30 is stable.

[0137] According to some embodiments of this application, the second mounting groove 52 further includes a second groove bottom surface (not shown in the figure), which is in contact with the partition beam 30.

[0138] According to some embodiments of this application, the inner surface of the second mounting groove 52 is bonded to the outer surface of the partition beam 30.

[0139] The inner surface of the second mounting groove 52 refers to the surface that forms the second mounting groove 52. The side surface of the third groove 521, the side surface of the fourth groove 522, and the bottom surface of the second groove are all the inner surfaces of the second mounting groove 52.

[0140] In the above scheme, the inner surface of the second mounting groove 52 is bonded to the outer surface of the partition beam 30, so that the fixed seat 50 is firmly connected to the partition beam 30, reducing the risk of the fixed seat 50 moving relative to the partition beam 30.

[0141] Please see Figure 3According to some embodiments of this application, the box body 10 includes a bottom wall 111 and a side wall 112. The side wall 112 surrounds the bottom wall 111. A partition beam 30 is disposed on the bottom wall 111. The partition beam 30 extends along a second direction Y. The second direction Y, the first direction X and the thickness direction of the bottom wall 111 intersect each other.

[0142] The intersection of the second direction Y, the first direction X, and the thickness direction of the bottom wall 111 can take various forms. For example, the second direction Y can be perpendicular to the first direction X, and the second direction Y and the first direction X can be non-perpendicular to the thickness direction of the bottom wall 111; or, the second direction Y can be perpendicular to the thickness direction of the bottom wall 111, and the second direction Y and the thickness direction of the bottom wall 111 can be non-perpendicular to the first direction X; or, the first direction X can be perpendicular to the thickness direction of the bottom wall 111, and the first direction X and the thickness direction of the bottom wall 111 can be non-perpendicular to the second direction Y; or, the second direction Y, the first direction X, and the thickness direction of the bottom wall 111 are all perpendicular to each other.

[0143] Optionally, the second direction Y, the first direction X, and the thickness direction of the bottom wall 111 are perpendicular to each other. In the figure, the direction indicated by the letter Y can be the second direction Y, and the direction indicated by the letter Z can be the thickness direction of the bottom wall 111.

[0144] The side wall 112 of the box can be set at the edge of the bottom wall 111 of the box so that the space enclosed by the side wall 112 and the bottom wall 111 of the box has a large capacity.

[0145] The connection between the side wall 112 and the bottom wall 111 of the box can take many forms. For example, the side wall 112 and the bottom wall 111 of the box can be integrally formed, such as by extruding aluminum material; or the side wall 112 and the bottom wall 111 of the box can be separately set and welded together.

[0146] The partition beam 30 is disposed on the bottom wall 111 of the box. The partition beam 30 can be welded to the bottom wall 111 of the box to ensure a stable connection between the partition beam 30 and the bottom wall 111 of the box. When the partition beam 30 is welded to the bottom wall 111 of the box, the material of the partition beam 30 can be the same as that of the bottom wall 111 of the box to facilitate the welding of the partition beam 30 to the bottom wall 111 of the box.

[0147] The partition beam 30 extends along the second direction Y. The dimension of the partition beam 30 in the second direction Y is larger than the dimension of the partition beam 30 in other directions. The length direction of the partition beam 30 can be parallel to the second direction Y. The thickness direction of the partition beam 30 can be parallel to the first direction X.

[0148] The two ends of the partition beam 30, which are opposite each other along the second direction Y, can be connected to the side wall 112 of the box, so that the connection area between the partition beam 30 and the box body 10 is large, and the connection between the partition beam 30 and the box body 10 is stable. The two ends of the partition beam 30 can be welded to the side wall 112 of the box, so that the partition beam 30 and the side wall 112 of the box are firmly connected, and the overall strength of the box body 10 is improved.

[0149] In the above scheme, the partition beam 30 is provided on the bottom wall 111 of the box so as to connect the partition beam 30 with the box body 10. The partition beam 30 extends along the second direction Y so that the partition beam 30 has a large shielding area for the first battery cell group 201 and the second battery cell group 202, so as to separate the first battery cell group 201 and the second battery cell group 202 and reduce the risk of short circuit between the first battery cell group 201 and the second battery cell group 202.

[0150] Please see Figure 3 and Figure 4 According to some embodiments of this application, the partition beam 30 includes a top surface 31 away from the bottom wall 111 of the box, and the partition beam 30 is provided with a first recess 32 recessed from the top surface 31 toward the bottom wall 111 of the box, and at least a portion of the fixing seat 50 is disposed in the first recess 32.

[0151] The partition beam 30 also includes a bottom surface (not shown in the figure) facing the bottom wall 111 of the box, and the bottom surface and the top surface 31 are arranged opposite each other along the thickness direction of the bottom wall 111. The bottom surface can contact the bottom wall 111 of the box so that the bottom wall 111 of the box has a good supporting effect on the partition beam 30.

[0152] The first recess 32 is the area formed by the recess of the partition beam 30 from the top surface 31 toward the bottom wall 111 of the box. The outline of the first recess 32 is similar to the outline of the fixing seat 50 so that at least a portion of the fixing seat 50 can be accommodated in the first recess 32.

[0153] The assembly method of the fixing seat 50 and the first recess 32 can be selected according to the actual situation. For example, a part of the fixing seat 50 can be set in the first recess 32, or the entire fixing seat 50 can be set in the first recess 32.

[0154] When the fixing seat 50 is disposed within the first recess 32, the fixing seat 50 contacts the bottom surface of the first recess 32, so that the fixing seat 50 is supported by the partition beam 30. For example, the bottom surface 514 of the first groove of the fixing seat 50 contacts the bottom surface of the first recess 32.

[0155] In the above scheme, the first recess 32 provides space for the fixing seat 50. At least part of the fixing seat 50 is disposed in the first recess 32, which can reduce the space occupied by the fixing seat 50 and the partition beam 30 in the thickness direction of the bottom wall 111 of the box after assembly, reduce the impact of the fixing seat 50 on the space utilization rate of the box 10, and make the battery 100 have a higher energy density.

[0156] Please see Figures 9 to 11 , Figure 9 This is a partial structural diagram of a battery provided in some embodiments of this application. Figure 10 These are schematic diagrams of the structure of the mounting base, insulating component, and busbar provided in some embodiments of this application. Figure 11 for Figure 10 A partial enlarged view at point A. According to some embodiments of this application, the battery 100 further includes an insulating member 60, which is connected to the partition beam 30 to isolate the partition beam 30 from the first battery cell group 201 and from the second battery cell group 202. The mounting base 50 is connected to the insulating member 60.

[0157] The insulating component 60 is an electrically insulating part used to achieve insulation isolation between the separator beam 30 and the first battery cell group 201 and the second battery cell group 202. The insulating component 60 can be made of plastic.

[0158] The insulating component 60 is connected to the partition beam 30 and can be bonded to the partition beam 30, making the connection between the insulating component 60 and the partition beam 30 secure. The inner surface of the insulating component 60 can be fitted to the outer surface of the partition beam 30.

[0159] The connection between the fixing seat 50 and the insulating part 60 can be in various ways. For example, the fixing seat 50 and the insulating part 60 can be integrally injection molded, or the fixing seat 50 and the insulating part 60 can be connected by snap-fitting, bonding, riveting, etc., or the fixing seat 50 and the insulating part 60 can be fused together.

[0160] In the above scheme, the insulating component 60 is connected to the partition beam 30. The insulating component 60 and the partition beam 30 have a large connection area, which facilitates the isolation of the first battery cell group 201 and the second battery cell group 202 and reduces the risk of short circuit between the first battery cell group 201 and the second battery cell group 202.

[0161] Please see Figures 9 to 11 According to some embodiments of this application, the insulating member 60 includes a first sidewall 61 and a second sidewall 62, which are respectively disposed on both sides of the partition beam 30 along the first direction X.

[0162] The first sidewall 61 and the second sidewall 62 are components of the insulating member 60, and the first sidewall 61 and the second sidewall define a space for accommodating the partition beam 30.

[0163] Optionally, at least a portion of the partition beam 30 is sandwiched between the first sidewall 61 and the second sidewall 62.

[0164] In the above scheme, the first sidewall 61 and the second sidewall 62 are respectively disposed on both sides of the partition beam 30 along the first direction X, which facilitates the assembly of the insulating component 60 with the partition beam 30 and makes the first battery cell group 201 and the second battery cell group 202 have a better insulation effect.

[0165] Please see Figures 9 to 11 According to some embodiments of this application, the insulating member 60 further includes a connecting wall 63, which is disposed on the side of the partition beam 30 away from the bottom wall 111 of the box, and the connecting wall 63 connects the first side wall 61 and the second side wall 62.

[0166] The first sidewall 61, the second sidewall 62, and the connecting wall 63 can be connected to form a U-shaped structure.

[0167] The third wall is located on the side of the partition beam 30 away from the bottom wall 111 of the box, so that the insulating member 60 has an opening facing the bottom wall 111 of the box, through which the partition beam 30 enters the space enclosed by the first wall, the second wall and the third wall.

[0168] In the above scheme, the connecting wall 63 connects the first side wall 61 and the second side wall 62, increasing the strength of the insulating member 60 so that the insulating member 60 can be connected to the partition beam 30.

[0169] According to some embodiments of this application, the fixing base 50 and the insulating member 60 are integrally formed.

[0170] In the above scheme, the fixing base 50 and the insulating part 60 can be integrally injection molded, so that the fixing base 50 and the insulating part 60 are firmly connected and easy to process and manufacture.

[0171] Please see Figure 10 and Figure 11 According to some embodiments of this application, the fixing base 50 is located at one end of the insulating member 60 along the second direction Y.

[0172] In the above scheme, the fixing seat 50 and the insulating component 60 are arranged along the second direction Y. The setting direction of the fixing seat 50 and the insulating component 60 is parallel to the extension direction of the partition beam 30. On the one hand, it is convenient for the fixing seat 50 and the insulating component 60 to have a large connection area with the partition beam 30 respectively. On the other hand, it makes reasonable use of the space in the extension direction of the partition beam 30, improves the space utilization rate inside the box 10, and makes the battery 100 have a high energy density.

[0173] Please see Figure 3 According to some embodiments of this application, both the first battery cell group 201 and the second battery cell group 202 include a plurality of battery cells 21 stacked along the first direction X.

[0174] In the above scheme, multiple battery cells 21 in the first battery cell group 201 and the second battery cell group 202 are stacked along the first direction X. On the one hand, this facilitates the electrical connection between the first battery cell group 201 and the second battery cell group 202. On the other hand, the space utilization rate of the housing 10 in the first direction X is relatively high.

[0175] The structure of the battery cell 21 in the first battery cell group 201 is the same as that of the battery cell 21 in the second battery cell group 202. For ease of description, the battery cell 21 in this application is a collective term for the battery cell 21 in the first battery cell group 201 and the battery cell 21 in the second battery cell group 202.

[0176] Please see Figure 8 See also Figure 12 , Figure 12 This is a partial structural diagram of a battery provided in some embodiments of this application. According to some embodiments of this application, a battery cell 21 includes a housing 211 and electrode terminals 212. The housing 211 has a first wall 2111 perpendicular to a first direction X. The electrode terminals 212 are mounted on the first wall 2111 and have a first surface 2121. The plane containing the first surface 2121 intersects the first wall 2111. One end of a connecting member 40 is connected to the first surface 2121 of the electrode terminal 212 of the battery cell 21 closest to the separator beam 30 in the first battery cell group 201, and the other end of the connecting member 40 is connected to the first surface 2121 of the electrode terminal 212 of the battery cell 21 closest to the separator beam 30 in the second battery cell group 202.

[0177] The housing 211 includes a shell and a cover, the shell having an opening and the cover closing the opening to isolate the internal environment of the battery cell 21 from the external environment.

[0178] The housing is a component used to cooperate with the cover to form the internal environment of the battery cell 21, wherein the formed internal environment can accommodate electrode components, electrolyte, and other components. The housing and the cover can be independent components. The housing can have various shapes and sizes. Specifically, the shape of the housing can be determined according to the specific shape and size of the electrode components. The material of the housing can be various, such as copper, iron, aluminum, stainless steel, aluminum alloy, plastic, etc., and this application embodiment does not impose any special limitations on this. This application embodiment describes a rectangular parallelepiped housing as an example.

[0179] A cover is a component that fits over the opening of the housing to isolate the internal environment of the battery cell 21 from the external environment. The shape of the cover can be adapted to the shape of the housing to fit it. Optionally, the cover can be made of a material with a certain hardness and strength (such as aluminum alloy), so that the cover is less prone to deformation under pressure and impact, giving the battery cell 21 higher structural strength and improved safety performance. Functional components such as electrode terminals 212 can be provided on the cover. The electrode terminals 212 can be used for electrical connection with electrode assemblies to output or input electrical energy to the battery cell 21. The material of the cover can also be various, such as copper, iron, aluminum, stainless steel, aluminum alloy, plastic, etc., and this application embodiment does not impose any special limitations on this. In some embodiments, an insulating structure can also be provided on the inner side of the cover. The insulating structure can be used to isolate the electrical connection components inside the housing from the cover to reduce the risk of short circuits. For example, the insulating structure can be plastic, rubber, etc.

[0180] The battery cell 21 also includes an electrode assembly, which is the component in the battery cell 21 where electrochemical reactions occur. The casing may contain one or more electrode assemblies. The electrode assembly is mainly formed by winding or stacking positive and negative electrode sheets, and typically a separator is provided between the positive and negative electrode sheets to separate them and prevent internal short circuits. The portions of the positive and negative electrode sheets containing active material constitute the main body of the cell assembly, while the portions without active material each constitute a tab. The positive and negative tabs may be located together at one end of the main body or separately at both ends. During the charging and discharging process of the battery 100, the positive and negative active materials react with the electrolyte, and the tabs connect to the electrode terminals 212 to form a current loop.

[0181] The first wall 2111 is a wall of the outer casing 211 perpendicular to the first direction X. The first wall 2111 can be a cover, or it can be a wall of the casing. Optionally, the first wall 2111 is a cover to facilitate the assembly of the electrode terminal 212 with the first wall 2111.

[0182] Electrode terminal 212 is mounted on first wall 2111. Electrode terminal 212 has a first surface 2121 and a first end face. The first end face is the surface of electrode terminal 212 that is away from first wall 2111. The plane of first surface 2121 intersects first wall 2111 and first end face.

[0183] Please see Figure 13 , Figure 13This is a schematic diagram illustrating the interaction between the electrode terminal and the first wall according to some embodiments of this application. The plane containing the first surface 2121 intersects the first wall 2111. The plane containing the first surface 2121 can be parallel to the thickness direction of the first wall 2111, or it can be inclined to the thickness direction of the first wall 2111. For example, the angle θ between the plane containing the first surface 2121 and the first wall 2111 is 60° to 120°; more preferably, the angle θ between the plane containing the first surface 2121 and the first wall 2111 is 85° to 95°; preferably, the plane containing the first surface 2121 can be perpendicular to the first wall 2111, that is, the plane containing the first surface 2121 can be parallel to the thickness direction of the first wall 2111, so that the first surface 2121 can be connected to the connecting member 40.

[0184] The first surface 2121 can be welded to the connecting member 40 so that the connecting member 40 is firmly connected to the electrode terminal 212.

[0185] In the above scheme, the electrode terminal 212 is disposed on the first wall 2111 of the housing 211 perpendicular to the first direction X, so as to realize the connection between multiple battery cells 21, and the connection between the first battery cell group 201 and the second battery cell group 202 and the connecting member 40.

[0186] Please see Figure 8 , Figure 11 and Figure 12 According to some embodiments of this application, the connecting member 40 includes a base wall 41, two end walls 42, and two flanges 43. The two end walls 42 are arranged opposite each other along a first direction X. The base wall 41 connects the two end walls 42. Each flange 43 extends from the end of the corresponding end wall 42 away from the base wall 41 in a direction away from the other end wall 42. One flange 43 is connected to the first surface 2121 of the electrode terminal 212 of the battery cell 21 closest to the separator beam 30 in the first battery cell group 201, and the other flange 43 is connected to the first surface 2121 of the electrode terminal 212 of the battery cell 21 closest to the separator beam 30 in the second battery cell group 202.

[0187] The two ends of the base wall 41 along the first direction X are respectively connected to two end walls 42, and the two end walls 42 and the two flanges 43 are respectively provided.

[0188] Each flange 43 extends from one end of the corresponding end wall 42 away from the base wall 41 in a direction away from the other end, so that the flange 43 can be connected to the first surface 2121 of the electrode terminal 212 of the corresponding battery cell 21.

[0189] The base wall 41, the two end walls 42 and the two flanges 43 can be integrally formed, for example, by stamping.

[0190] The connecting member 40 can be a bent structure, with the end wall 42 bent relative to the base wall 41 and the flange 43 bent relative to the end wall 42.

[0191] In the above scheme, the structural form of the connecting member 40 gives the connecting member 40 high strength. The flange 43 is connected to the first surface 2121 of the electrode terminal 212, which can reduce the space occupation in the first direction X and improve the space utilization rate of the housing 10 in the first direction X.

[0192] Please see Figure 8 , Figure 11 and Figure 12 According to some embodiments of this application, the fixing base 50 includes a first mounting groove 51, the first mounting groove 51 includes a first groove side 511 and a second groove side 512 disposed opposite to each other, and the base wall 41 is sandwiched between the first groove side 511 and the second groove side 512.

[0193] The first mounting groove 51 is a groove of the fixing seat 50 for accommodating the base wall 41, and at least a portion of the base wall 41 is sandwiched between the side surface 511 of the first groove and the side surface 512 of the second groove.

[0194] In the above scheme, the base wall 41 is sandwiched between the first groove side 511 and the second groove side 512, so that the movement of the base wall 41 is restricted by the first groove side 511 and the second groove side 512, thereby making the connection between the connecting member 40 and the first battery cell group 201 and the second battery cell group 202 reliable.

[0195] Please see Figure 8 According to some embodiments of this application, the base wall 41 includes a second surface 411 and a third surface 412 disposed opposite to each other, two end walls 42 protruding from the second surface 411, a first groove side 511 disposed opposite to the second surface 411, and a second groove side 512 disposed opposite to the third surface 412; the projection of the first groove side 511 onto the second surface 411 along the first direction X has a dimension L1, and the projection of the second groove side 512 onto the third surface 412 along the first direction X has a dimension L2, satisfying that L1 < L2.

[0196] The second surface 411 and the third surface 412 are disposed opposite each other along the thickness direction of the base wall 41, and the thickness direction of the base wall 41 intersects the first direction X. Optionally, the thickness direction of the base wall 41 may be perpendicular to the first direction X.

[0197] The first groove side 511 is disposed opposite to the second surface 411, and the first groove side 511 may be parallel to the second surface 411. The second groove side 512 is disposed opposite to the third surface 412, and the second groove side 512 may be parallel to the third surface 412.

[0198] The projection of the first groove side surface 511 onto the second surface 411 refers to the projection of the first groove side surface 511 onto the second surface 411 along the thickness direction of the base wall 41. Similarly, the projection of the second groove side surface 512 onto the third surface 412 refers to the projection of the second groove side surface 512 onto the second surface 411 along the thickness direction of the base wall 41.

[0199] When the first groove side 511 and the second groove side 512 clamp the base wall 41, the first groove side 511 can fit with the second surface 411, and the second groove side 512 can fit with the third surface 412. At this time, the projection of the first groove side 511 on the second surface 411 can be the overlapping area of ​​the first groove side 511 and the second surface 411, and the projection of the second groove side 512 on the third surface 412 can be the overlapping area of ​​the second groove side 512 and the third surface 412.

[0200] In the above scheme, since L1 is smaller than L2, the base wall 41 and the second groove side 512 have a large overlap area, so that the fixing seat 50 can have a better constraint effect on the connecting member 40; at the same time, the two end walls 42 protrude from the second surface 411, and the first groove side 511 and the second surface 411 are arranged opposite to each other, reducing the risk of assembly interference between the fixing seat 50 and the connecting member 40.

[0201] Please see Figure 8 According to some embodiments of this application, the first wall 2111 of the battery cell 21 of the first battery cell group 201 faces the partition beam 30, and the first wall 2111 of the battery cell 21 of the second battery cell group 202 faces away from the partition beam 30.

[0202] In the above scheme, the arrangement of multiple battery cells 21 in the first battery cell group 201 is the same as the arrangement of multiple battery cells 21 in the second battery cell group 202, which facilitates the cooperation between the first battery cell group 201 and the second battery cell group 202 and the housing 10.

[0203] Please see Figure 6 and Figure 8 According to some embodiments of this application, the mounting base 50 further includes a third mounting groove 53, in which a portion of the electrode terminal 212 of the battery cell 21 closest to the separator beam 30 of the first battery cell group 201 is located within the third mounting groove 53.

[0204] The third mounting groove 53 can be formed by recessing the surface of the fixing base 50 facing the first battery cell group 201 toward the second battery cell group 202 in the first direction X. Since the first wall 2111 of the first battery cell group 201 is provided facing the partition beam 30, the electrode terminal 212 of the battery cell 21 of the first battery cell group 201 closest to the partition beam 30 protrudes toward the partition beam 30, and a portion of the protruding portion of the electrode terminal 212 can be accommodated in the third mounting groove 53.

[0205] In the above scheme, a portion of the electrode terminal 212 of the battery cell 21 closest to the separator beam 30 in the first battery cell group 201 is located in the third mounting groove 53, which reduces the space occupied by the structure after the connecting member 40 is connected to the electrode terminal 212 in the first direction X, and makes reasonable use of the internal space of the housing 10, so that the battery 100 has a high energy density.

[0206] According to some embodiments of this application, the outer shell 211 includes a first wall 2111 and a second wall 2112 disposed opposite to each other along a first direction X, a third wall and a fourth wall disposed opposite to each other along a second direction Y, and a fifth wall and a sixth wall disposed opposite to each other along a third direction. The areas of the third wall and the fourth wall are both smaller than the area of ​​the first wall 2111, the area of ​​the third wall and the fourth wall are both smaller than the area of ​​the second wall 2112, the area of ​​the fifth wall and the sixth wall are both smaller than the area of ​​the first wall 2111, and the area of ​​the fifth wall and the sixth wall are both smaller than the area of ​​the second wall 2112. The first direction X, the second direction Y and the third direction intersect each other.

[0207] The third direction, the second direction Y, and the first direction X can intersect each other in various ways. For example, the third direction can be perpendicular to the second direction Y, and the third direction and the second direction Y can be non-perpendicular to the first direction X; or, the third direction can be perpendicular to the first direction X, and the third direction and the first direction X can be non-perpendicular to the second direction Y; or, the second direction Y can be perpendicular to the first direction X, and the second direction Y and the first direction X can be non-perpendicular to the third direction; or, the third direction, the second direction Y, and the first direction X are all perpendicular to each other. Optionally, the third direction, the second direction Y, and the first direction X are all perpendicular to each other.

[0208] The first wall 2111, the second wall 2112, the third wall, the fourth wall, the fifth wall and the sixth wall are the walls that constitute the outer shell 211, and these walls can enclose a space for accommodating the electrode assembly.

[0209] In the above scheme, the first wall 2111 and the second wall 2112 are the walls with larger areas of the outer shell 211. Multiple battery cells 21 are stacked along a first direction X perpendicular to the first wall 2111, making the first battery cell group 201 and the second battery cell group 202 have a compact structure, and making the battery 100 have a high energy density.

[0210] Please see Figure 8 and Figure 12 According to some embodiments of this application, the housing 211 also has a second wall 2112 disposed opposite to the first wall 2111, and a second recess 2113 is formed by recessing a first region at the edge of the second wall 2112. The second recess 2113 is used to accommodate the electrode terminal 212 of the battery cell 21 adjacent to the second wall 2112.

[0211] The second wall 2112 is disposed opposite to the first wall 2111 along the first direction X. The first region is the edge region of the second wall 2112, and along the first direction X, the first region corresponds to the region of the first wall 2111 where the electrode terminals 212 are mounted. The first region is recessed towards the first wall 2111 along the first direction X to form a second recess 2113.

[0212] In some embodiments, the depth of the second recess 2113 is greater than the height of the electrode terminal 212 protruding from the first wall 2111. It is understood that the electrode terminal 212 of the battery cell 21 adjacent to the second wall 2112 may also be partially accommodated within the second recess 2113.

[0213] The surface of the second wall 2112 may be provided with an insulating structure so that when multiple battery cells 21 are stacked, the second wall 2112 is insulated from the electrode terminals 212 of adjacent battery cells 21. The insulating structure may also be provided on the surface of the electrode terminals 212 away from the first wall 2111 so that when multiple battery cells 21 are stacked, the electrode terminals 212 are isolated from the first wall 2111.

[0214] In the above scheme, the second recess 2113 can accommodate the electrode terminal 212 of the battery cell 21 adjacent to the second wall 2112, making the battery cell group structure compact, thereby making the battery 100 have a high energy density.

[0215] According to some embodiments of this application, this application also provides an electrical device, which includes the battery 100 provided in any of the above embodiments, and the battery 100 provides electrical energy to the electrical device.

[0216] The electrical equipment can be any of the above-mentioned devices or systems that use battery 100.

[0217] According to some embodiments of this application, please refer to Figures 3 to 13 This application provides a battery 100, which includes a housing 10, a first battery cell group 201, a second battery cell group 202, a partition beam 30, a connecting member 40, a fixing base 50, and an insulating member 60.

[0218] The housing 10 is rectangular in shape and includes a first sub-housing 11 and a second sub-housing 12. The first sub-housing 11 includes a bottom wall 111 and a side wall 112. The side wall 112 surrounds the bottom wall 111, and the thickness direction of the bottom wall 111 is perpendicular to the first direction X. The second sub-housing 12 is located on the side of the side wall 112 opposite to the bottom wall 111. The first sub-housing 11 and the second sub-housing 12 are fastened together to form a receiving space. The first battery cell group 201, the second battery cell group 202, and the partition beam 30 are all disposed within the receiving space.

[0219] A partition beam 30 is disposed on the bottom wall and extends along the second direction Y. Both ends of the partition beam 30 are respectively connected to the side wall 112 of the box. The partition beam 30 includes a top surface 31 away from the bottom wall 111 of the box, and the partition beam 30 is provided with a first recess 32 that is recessed from the top surface 31 toward the bottom wall.

[0220] The first battery cell group 201 and the second battery cell group 202 are disposed on both sides of the partition beam 30 along the first direction X. Both the first battery cell group 201 and the second battery cell group 202 include multiple battery cells 21 stacked along the first direction X. Each battery cell 21 includes a housing 211 and an electrode terminal 212. The housing 211 has a first wall 2111 perpendicular to the first direction X. The electrode terminal 212 is mounted on the first wall 2111 and has a first surface 2121. The plane containing the first surface 2121 intersects the first wall 2111. The first wall 2111 of the battery cell 21 in the first battery cell group 201 faces the partition beam 30, while the first wall 2111 of the battery cell 21 in the second battery cell group 202 faces away from the partition beam 30.

[0221] The connecting member 40 is used to realize the electrical connection between the first battery cell group 201 and the second battery cell group 202. The connecting member 40 includes a base wall 41, two end walls 42 and two flanges 43. The two end walls 42 are arranged opposite each other along a first direction X. The base wall 41 connects the two end walls 42. Each flange 43 extends from the end of the corresponding end wall 42 away from the base wall 41 in a direction away from the other end wall 42. One flange 43 is connected to the first surface 2121 of the electrode terminal 212 of the battery cell 21 closest to the separator beam 30 in the first battery cell group 201, and the other flange 43 is connected to the first surface 2121 of the electrode terminal 212 of the battery cell 21 closest to the separator beam 30 in the second battery cell group 202.

[0222] The mounting base 50 includes a first mounting groove 51, a second mounting groove 52, and a third mounting groove 53. The first mounting groove 51 includes a first groove side surface 511, a second groove side surface 512, and a first groove bottom surface 514 arranged opposite to each other. The base wall 41 is sandwiched between the first groove side surface 511 and the second groove side surface 512, and the first groove bottom surface 514 supports the base wall 41. The second mounting groove 52 includes a third groove side surface 521 and a fourth groove side surface 522 arranged opposite to each other along the first direction X. At least a portion of the separator beam 30 is sandwiched between the third groove side surface 521 and the fourth groove side surface 522, and the third groove side surface 521 and the fourth groove side surface 522 are bonded to the separator beam 30. A portion of the electrode terminal 212 of the battery cell 21 closest to the separator beam 30 in the first battery cell group 201 is located in the third mounting groove 53.

[0223] The insulating component 60 is integrally formed with the fixing base 50, which is located at one end of the insulating component 60 along the second direction Y. The insulating component 60 includes a first sidewall 61, a second sidewall 62, and a connecting arm. The first sidewall 61 and the second sidewall 62 are respectively disposed on both sides of the partition beam 30 along the first direction X. The connecting wall 63 is disposed on the side of the partition beam 30 away from the bottom wall 111 of the box, and the connecting wall 63 connects the first sidewall 61 and the second sidewall 62. The inner surface of the insulating component 60 is bonded to the outer surface of the partition beam 30.

[0224] According to the embodiment of the present application, a portion of the fixing seat 50 is installed in the first recess 32 of the partition beam 30. The first battery cell group 201 and the second battery cell group 202 located on both sides of the partition beam 30 are electrically connected by the connecting member 40. The connecting member 40 is fixed to the first mounting groove 51 of the fixing seat 50. The first groove side 511 and the second groove side 512 of the first mounting groove 51 clamp the connecting member 40, so that the movement of the connecting member 40 is constrained by the fixing seat 50, which improves the connection reliability between the connecting member 40 and the battery cell group, reduces the risk of damage to the connection between the connecting member 40 and the battery cell group due to the movement of the connecting member 40, and thus makes the battery 100 have higher safety.

[0225] Although this application has been described with reference to preferred embodiments, various modifications can be made thereto and components can be replaced with equivalents without departing from the scope of this application. In particular, the technical features mentioned in the various embodiments can be combined in any manner, provided there is no structural conflict. This application is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. A battery, characterized by, include: Box; The first battery cell group and the second battery cell group are disposed in the box and arranged along the first direction; A separator beam is disposed between the first battery cell group and the second battery cell group; A connecting member is provided, through which the first battery cell group and the second battery cell group are electrically connected; A fixed base is provided on the partition beam; The connecting member is fixed to the fixing base; The connecting member includes an integrally formed base wall, two end walls, and two flanges. The two end walls are arranged opposite to each other along the first direction. The base wall connects the two end walls. Each flange extends from the end of the corresponding end wall away from the base wall in a direction away from the other end wall. One flange is connected to the electrode terminal of the battery cell closest to the separator beam in the first battery cell group, and the other flange is connected to the electrode terminal of the battery cell closest to the separator beam in the second battery cell group. The fixing base includes a first mounting groove, and a portion of the connecting member is disposed in the first mounting groove. The first mounting groove includes a first groove side and a second groove side disposed opposite to each other along a second direction. The second groove side is provided with a protrusion, which protrudes toward the first groove side and abuts against the connecting member, such that the side of the connecting member away from the second groove side is attached to the first groove side. The base wall includes a second surface and a third surface that are arranged opposite to each other along the thickness direction of the base wall. Two end walls protrude from the second surface. The side of the first groove is arranged opposite to the second surface. The side of the second groove is arranged opposite to the third surface. The thickness direction of the base wall is parallel to the second direction. The second direction, the first direction, and the thickness direction of the bottom wall of the box are perpendicular to each other.

2. The battery of claim 1, wherein, The first mounting groove also includes a first groove bottom surface, which connects the first groove side surface and the second groove side surface, and the first groove bottom surface supports the connecting member.

3. The battery according to claim 2, characterized in that, Along the direction away from the bottom surface of the first groove, the connecting member does not extend beyond the end of the side surface of the first groove that is away from the bottom surface of the first groove, and / or, the connecting member does not extend beyond the end of the side surface of the second groove that is away from the bottom surface of the first groove.

4. The battery according to claim 1, characterized in that, The mounting base includes a second mounting groove, which includes a third groove side and a fourth groove side disposed opposite to each other along the first direction, and at least a portion of the partition beam is sandwiched between the third groove side and the fourth groove side.

5. The battery according to claim 4, characterized in that, The inner surface of the second mounting groove is bonded to the outer surface of the partition beam.

6. The battery according to claim 1, characterized in that, The box body includes a bottom wall and a side wall, the side wall surrounding the bottom wall, and a partition beam disposed on the bottom wall, the partition beam extending along a second direction, the second direction intersecting the first direction.

7. The battery according to claim 6, characterized in that, The partition beam includes a top surface away from the bottom wall of the box, and the partition beam is provided with a first recess that is recessed from the top surface toward the bottom wall of the box, and at least a portion of the fixing seat is disposed in the first recess.

8. The battery according to claim 6, characterized in that, The battery also includes an insulating component connected to the partition beam to isolate the partition beam from the first battery cell group and from the second battery cell group. The mounting base is connected to the insulating component.

9. The battery according to claim 8, characterized in that, The insulating component includes a first sidewall and a second sidewall, which are respectively disposed on both sides of the separator beam along the first direction.

10. The battery according to claim 9, characterized in that, The insulating component also includes a connecting wall, which is disposed on the side of the partition beam away from the bottom wall of the box, and the connecting wall connects the first side wall and the second side wall.

11. The battery according to claim 8, characterized in that, The mounting base and the insulating component are integrally formed.

12. The battery according to claim 8, characterized in that, The mounting base is located at one end of the insulating member along the second direction.

13. The battery according to claim 1, characterized in that, Both the first battery cell group and the second battery cell group include multiple battery cells stacked along the first direction.

14. The battery according to claim 13, characterized in that, The battery cell includes a housing and electrode terminals. The housing has a first wall perpendicular to the first direction. The electrode terminals are mounted on the first wall and have a first surface. The plane containing the first surface intersects the first wall. One end of the connecting member is connected to the first surface of the electrode terminal of the battery cell closest to the separator beam in the first battery cell group. The other end of the connecting member is connected to the first surface of the electrode terminal of the battery cell closest to the separator beam in the second battery cell group.

15. The battery according to claim 14, characterized in that, One of the flanged portions is connected to the first surface of the electrode terminal of the battery cell closest to the separator beam in the first battery cell group, and the other flanged portion is connected to the first surface of the electrode terminal of the battery cell closest to the separator beam in the second battery cell group.

16. The battery according to claim 14, characterized in that, The projection of the first groove side surface onto the second surface along the first direction has a dimension of L1, and the projection of the second groove side surface onto the third surface along the first direction has a dimension of L2, satisfying that L1 < L2.

17. The battery according to claim 14, characterized in that, The first wall of the battery cell in the first battery cell group is disposed facing the partition beam, and the first wall of the battery cell in the second battery cell group is disposed away from the partition beam.

18. The battery according to claim 17, characterized in that, The mounting base also includes a third mounting slot, in which a portion of the electrode terminals of the battery cell closest to the separator beam in the first battery cell group are located.

19. The battery according to claim 14, characterized in that, The outer shell includes a first wall and a second wall arranged opposite each other along the first direction, a third wall and a fourth wall arranged opposite each other along the second direction, and a fifth wall and a sixth wall arranged opposite each other along the third direction. The areas of the third wall and the fourth wall are both smaller than the area of ​​the first wall, the areas of the third wall and the fourth wall are both smaller than the area of ​​the second wall, the areas of the fifth wall and the sixth wall are both smaller than the area of ​​the first wall, and the areas of the fifth wall and the sixth wall are both smaller than the area of ​​the second wall. The first direction, the second direction and the third direction intersect each other.

20. The battery according to any one of claims 14-19, characterized in that, The housing also has a second wall disposed opposite to the first wall, and a second recess is formed in a first region of the edge of the second wall, the second recess being used to accommodate the electrode terminal of the battery cell adjacent to the second wall.

21. An electrical appliance, characterized in that, Includes the battery as described in any one of claims 1-20.

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