Battery and electric device

Abstract

The utility model relates to a battery and an electric device. The battery includes a case including a first beam; the battery monomer group comprises a first battery monomer group and a second battery monomer group which are adjacently arranged along a first direction, each of the first battery monomer group and the second battery monomer group comprises a plurality of battery monomers stacked along a second direction, the first battery monomer group comprises a first surface, and the second battery monomer group comprises a second surface; the first surface and the second surface are adjacent in the first direction and are perpendicular to the third direction; the crimping part is arranged at the adjacent position of the first surface and the second surface so as to be connected to the first surface and the second surface at the same time; the first beam is located at one end of the first battery monomer group and one end of the second battery monomer group in the second direction, the crimping part extends in the second direction and is arranged at an interval with the first beam, and the first electric connecting part is used for electrically connecting the first battery monomer group and the second battery monomer group; at least a portion of the first electrical connector is located at a gap between the crimp and the first beam.

Description

Technical Field

[0001] The present application relates to the field of battery technology, and in particular to a battery and an electrical device. Background Art

[0002] The statements herein merely provide background information related to the present application and do not necessarily constitute prior art.

[0003] Nowadays, in order to simplify the battery pack structure, a module-free battery pack has emerged. Since the module-free battery pack eliminates the module end plates, side plates and other structures, when the battery cell expands, the battery cell is only supported by the box beam, which can easily cause the box to fail. Utility Model Content

[0004] In view of the problem, the present application provides a battery and an electrical device, which can alleviate the problem that when the battery cell expands, the box body may fail easily due to the battery cell being limited and supported only by the box body beam.

[0005] In a first aspect, the present application provides a battery, comprising:

[0006] A box body, the box body comprising a first beam;

[0007] A battery cell group, comprising a first battery cell group and a second battery cell group adjacently arranged along a first direction, the first battery cell group and the second battery cell group each comprising a plurality of battery cells stacked along a second direction, the first battery cell group comprising a first surface, the second battery cell group comprising a second surface, the first surface and the second surface being adjacently arranged along the first direction and both being perpendicular to a third direction, and the first direction, the second direction and the third direction being perpendicular to each other in pairs; and

[0008] A crimping member, disposed at a location adjacent to the first surface and the second surface to simultaneously connect to the first surface and the second surface;

[0009] Among them, the first beam is located at one end of the first battery cell group and the second battery cell group along the second direction, the crimping piece extends along the second direction and is spaced apart from the first beam, and the battery also includes a first electrical connector, which is used to electrically connect the first battery cell group and the second battery cell group, and at least a portion of the first electrical connector is located at the gap between the crimping piece and the first beam.

[0010] By arranging at least a portion of the first electrical connector to be located at the interval between the crimping piece and the first beam, the crimping piece can avoid the first electrical connector and is not interfered by the position of the first electrical connector; and, by arranging the crimping piece to be simultaneously connected to the first surface of the adjacent first battery cell group and the second surface of the adjacent second battery cell group, it is possible to connect the battery cells of the two adjacent battery cell groups, and each battery cell can be fixed and limited, so that when the battery cell expands and exerts pressure on the box, the deformation of the box is reduced due to the restraint of the crimping piece, thereby reducing the requirements for the structural strength of the box beam and reducing the risk of box failure.

[0011] In some embodiments, the battery cell group also includes a third battery cell group and a fourth battery cell group, the battery also includes a separator, the third battery cell group and the first battery cell group are relatively arranged on both sides of the separator along the second direction, the fourth battery cell group and the second battery cell group are relatively arranged on both sides of the separator along the second direction, the third battery cell group includes a third surface, the fourth battery cell group includes a fourth surface, the third surface and the fourth surface are adjacent to each other along the first direction and are both perpendicular to the third direction, and the crimping piece extends along the second direction and crosses the separator to connect to the third surface and the fourth surface.

[0012] Since the crimping piece can cross the separator, the extension of the crimping piece is not affected by the position of the separator, and the crimping piece can simultaneously press and connect four mutually adjacent battery cell groups, thereby improving the crimping efficiency.

[0013] In some embodiments, the box body also includes a carrier, which is used to support the battery cell group, and the partition includes a first wall away from the carrier along a third direction, and the minimum distance between the third surface and / or the fourth surface and the carrier is greater than or equal to the minimum distance between the first wall and the carrier.

[0014] In this way, the third surface and / or the fourth surface can be higher than or equal to the first wall surface of the partition. When the crimping piece extends along the second direction and crosses over the partition, the crimping piece is bent and can directly cross over the top of the partition in a straight line, thereby simplifying the overall structure of the crimping piece.

[0015] In some embodiments, the partition comprises an avoidance groove opening toward the third direction, and at least a portion of the crimping member is located in the avoidance groove.

[0016] When the crimping piece extends along the second direction and crosses over the partition, since the crimping piece is provided with an escape groove, the crimping piece can be directly partially located in the escape groove in a straight line to cross over, thereby simplifying the overall structure of the crimping piece.

[0017] In some embodiments, the battery cell group also includes a third battery cell group and a fourth battery cell group, the box body also includes a second beam and a third beam, the third battery cell group and the first battery cell group are relatively arranged on both sides of the second beam along the second direction, the fourth battery cell group and the second battery cell group are relatively arranged on both sides of the second beam along the second direction, and the third beam is located on the side of the third battery cell group and the fourth battery cell group away from the second beam along the second direction.

[0018] By arranging the second beam between the third battery cell group and the first battery cell group and between the fourth battery cell group and the second battery cell group, the structural strength of the box can be improved when the number of battery cells is large, thereby improving the anti-expansion effect of the box.

[0019] In some embodiments, the third battery cell group includes a third surface, the fourth battery cell group includes a fourth surface, the third surface and the fourth surface are adjacent along a first direction and are both perpendicular to the third direction, the battery also includes a locking crimping piece, the locking crimping piece is arranged at the junction of the third surface and the fourth surface to be simultaneously connected to the third surface and the fourth surface, and the two ends of the locking crimping piece are respectively connected to the second beam and the third beam.

[0020] Since it is no longer affected by the first electrical connection part, the locking crimping part does not need to be avoided. In this way, the two ends of the locking crimping part can be connected to the second beam and the third beam respectively without forming a spacing space between the third beam. When the battery cells of the third battery cell group and the fourth battery cell group expand and exert pressure on the second beam and the third beam of the box, the deformation of the second beam and the third beam is reduced due to the restraint of the locking crimping part, thereby reducing the requirements for the structural strength of the box beam and reducing the risk of box failure.

[0021] In some embodiments, the locking crimping piece includes a metal connector and an insulating connector, the metal connector is connected to the second beam and the third beam, a portion of the insulating connector is located between the third surface and the metal connector, and a portion of the insulating connector is located between the fourth surface and the metal connector.

[0022] Since the metal connector has better structural strength, by arranging the metal connector to connect the second beam and the third beam, the structural strength of the box can be better improved, thereby improving the anti-expansion effect. In addition, by arranging the insulating connector between the third surface of the third battery cell group and the metal connector, and between the fourth surface of the fourth battery cell group and the metal connector, the metal connector and the battery cell can be insulated, thereby improving the reliability of the battery.

[0023] In some embodiments, the insulating connector is bonded to the third surface and the fourth surface.

[0024] By providing an insulating connector bonded to the third surface and the fourth surface, the locking crimping member can be in closer contact with the third battery cell group and the fourth battery cell group, thereby fixing and limiting each battery cell and improving the pressing reliability.

[0025] In some embodiments, the metal connector is bonded to the insulating connector.

[0026] By bonding, the metal connector and the insulating connector can be more tightly connected, thereby improving insulation reliability.

[0027] In some embodiments, the insulating connector covers at least a portion of the metal connector.

[0028] By providing an insulating connector to cover at least a portion of the metal connector, the position reliability between the insulating connector and the metal connector can be improved, thereby improving the insulation effect between the metal connector and the battery cell.

[0029] In some embodiments, the crimp is bonded to the first surface and the second surface.

[0030] Since the crimping piece is bonded to the first surface and the second surface, the bonding operation is simple and reliable, and is also beneficial to the fixation and positioning of the battery cells.

[0031] In some embodiments, the first battery cell group includes a first battery cell directly connected to the first electrical connector, the second battery cell group includes a second battery cell directly connected to the first electrical connector, and projected along the third direction, the crimping member is completely misaligned with the first battery cell and / or the second battery cell.

[0032] The crimping piece is not located above the first battery cell and / or the second battery cell along the third direction, thereby providing sufficient spacing space between the crimping piece and the first beam for placing the first electrical connector, so that the first battery cell and / or the second battery cell have a larger contact area with the first electrical connector, thereby improving the reliability of the electrical connection.

[0033] In some embodiments, the crimping member is an epoxy fiberglass composite material.

[0034] The crimping parts made of epoxy resin glass fiber composite material have insulating properties and can maintain insulation between battery cells, thereby improving the reliability of the battery. In addition, the crimping parts made of epoxy resin glass fiber composite material have high strength and toughness, thereby improving the crimping effect.

[0035] In a second aspect, an electrical device is provided, comprising a battery in any of the above embodiments, wherein the battery is used to provide electrical energy.

[0036] By arranging at least a portion of the first electrical connector to be located at the interval between the crimping piece and the first beam, the crimping piece can avoid the first electrical connector and is not interfered by the position of the first electrical connector; and, by arranging the crimping piece to be simultaneously connected to the first surface of the adjacent first battery cell group and the second surface of the adjacent second battery cell group, it is possible to connect the battery cells of the two adjacent battery cell groups, and each battery cell can be fixed and limited, so that when the battery cell expands and exerts pressure on the box, the deformation of the box is reduced due to the restraint of the crimping piece, thereby reducing the requirements for the structural strength of the box beam and reducing the risk of box failure.

[0037] The above description is only an overview of the technical solution of the present application. In order to more clearly understand the technical means of the present application, it can be implemented in accordance with the contents of the specification. In order to make the above and other purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are listed below. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] Various other advantages and benefits will become apparent to those of ordinary skill in the art by reading the detailed description of the preferred embodiments below. The accompanying drawings are only for the purpose of illustrating the preferred embodiments and are not to be considered as limiting the present application. Moreover, the same reference numerals are used throughout the drawings to represent the same components. In the drawings:

[0039] Figure 1 is a schematic diagram of the structure of a vehicle according to one or more embodiments.

[0040] Figure 2 is a schematic diagram of an exploded structure of a battery according to one or more embodiments.

[0041] Figure 3 is a schematic diagram of an exploded structure of a battery cell according to one or more embodiments.

[0042] Figure 4 is a schematic diagram of the structure of a battery according to one or more embodiments.

[0043] Figure 5 for Figure 4 Schematic diagram of the battery structure from top view.

[0044] Figure 6 for Figure 5 Schematic diagram of the AA cross-sectional structure of the battery shown.

[0045] Figure 7 for Figure 6 A local enlarged schematic diagram of point A in the battery shown.

[0046] Figure 8 for Figure 6A schematic enlarged view of the part B in the battery shown.

[0047] The reference numerals in the specific implementation manner are as follows:

[0048] Vehicle 1000, battery 100, box 10, first part 11, second part 12, first beam 13, second beam 15, third beam 16, battery cell 20, end cover 21, electrode terminal 211, shell 22, battery cell assembly 23, battery cell group 30, first battery cell group 31, first surface 311, second battery cell group 32, second surface 321, third battery cell group 33, third surface 331, fourth battery cell group 34, fourth surface 341, crimping part 40, first crimping part 41, second crimping part 42, first electrical connection part 50, locking crimping part 60, metal connector 61, insulating connector 62, controller 200, motor 300. DETAILED DESCRIPTION

[0049] The following embodiments of the technical solution of the present application are described in detail in conjunction with the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present application, and are therefore only used as examples, and cannot be used to limit the scope of protection of the present application.

[0050] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by technicians in the technical field to which this application belongs; the terms used herein are only for the purpose of describing specific embodiments and are not intended to limit this application; the terms "including" and "having" in the specification and claims of this application and the above-mentioned figure descriptions and any variations thereof are intended to cover non-exclusive inclusions.

[0051] In the description of the embodiments of the present application, the technical terms "first", "second", etc. are only used to distinguish different objects, and cannot be understood as indicating or implying relative importance or implicitly indicating the number, specific order or primary and secondary relationship of the indicated technical features. In the description of the embodiments of the present application, the meaning of "multiple" is more than two, unless otherwise clearly and specifically defined.

[0052] Reference to "embodiments" herein means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present application. The appearance of the phrase in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0053] In the description of the embodiments of the present application, the term "and / or" is only a description of the association relationship of associated objects, indicating that three relationships may exist. For example, 1 and / or 2 may represent: 1 exists alone, 1 and 2 exist at the same time, and 2 exists alone. In addition, the character " / " in this article generally indicates that the associated objects before and after are in an "or" relationship.

[0054] In the description of the embodiments of the present application, the term "multiple" refers to more than two (including two). Similarly, "multiple groups" refers to more than two groups (including two groups), and "multiple pieces" refers to more than two pieces (including two pieces).

[0055] In the description of the embodiments of the present application, the technical terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, which are only for the convenience of describing the embodiments of the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the embodiments of the present application.

[0056] In the description of the embodiments of the present application, unless otherwise clearly specified and limited, technical terms such as "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, and it can be the internal connection of two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the embodiments of the present application can be understood according to the specific circumstances.

[0057] At present, in order to simplify the battery PACK structure, improve space utilization, simplify its installation process and save production costs, a widely used CTP technology is constantly innovating and developing. CTP, or Cell To PACK, directly integrates the battery into the battery pack, thereby eliminating the intermediate module architecture, simplifying the PACK structure and improving space utilization.

[0058] However, with the removal of the module structure, some limiting structures for the battery cells are also cancelled. When the battery cells expand, the battery cells are only supported by the box beams, which can easily cause the box to fail.

[0059] Normally, multiple battery cells are arranged into groups and then placed side by side in a battery box. In order to improve the structural strength of the box beam and reduce the risk of box failure, a steel strip is installed above the battery cell group. The steel strip can be crimped onto the end cover of the battery cell, and both ends of the steel strip are also locked on the box beam for connection. In this way, when the battery cell expands and exerts pressure on the box beams at both ends, the deformation of the box beam is reduced due to the restraint of the steel strip, thereby reducing the requirements for the structural strength of the box beam and reducing the risk of box failure.

[0060] However, since adjacent battery cell groups need to be connected in series or in parallel, a bar is used to connect one end of the adjacent battery cell groups. At this time, if a steel pressure strip is used to cross the bar and connect to the box beam, the steel pressure strip will be lifted, causing the gap between the steel pressure strip and the battery cell to become larger, and it will not be able to be crimped onto the end cover of the battery cell. If the steel pressure strip does not cross the bar, the two ends of the steel pressure strip cannot be locked on the box beam at the same time for connection.

[0061] Furthermore, in order to alleviate the problem that the steel pressure strip is inconvenient to set due to the connection of the bar piece, thereby being unable to effectively reduce the deformation of the box beam, reduce the requirements for the structural strength of the box beam, and reduce the risk of box failure, the present application designs a battery, including a box, a battery cell group and a crimping piece. The box includes a first beam, the battery cell group includes a first battery cell group and a second battery cell group arranged adjacently along a first direction, the first battery cell group and the second battery cell group both include a plurality of battery cells stacked along a second direction, the first battery cell group includes a first surface, the second battery cell group includes a second surface, the first surface and the second surface are adjacent along the first direction and are both perpendicular to the third direction, and the first direction, the second direction and the third direction are perpendicular to each other. The crimping piece is arranged at the junction of the first surface and the second surface to be connected to the first surface and the second surface at the same time. Among them, the first beam is located at one end of the first battery cell group and the second battery cell group along the second direction, and the crimping piece extends along the second direction and is spaced apart from the first beam. The battery further includes a first electrical connector for electrically connecting the first battery cell group and the second battery cell group, and at least a portion of the first electrical connector is located at a gap between the crimping member and the first beam.

[0062] In this way, by arranging at least a part of the first electrical connector to be located at the interval between the crimping piece and the first beam, the crimping piece can avoid the first electrical connector and is not interfered by the position of the first electrical connector; and, by arranging the crimping piece to be simultaneously connected to the first surface of the adjacent first battery cell group and the second surface of the second battery cell group, it is possible to connect the battery cells of the two adjacent battery cell groups, so that when the battery cells expand and exert pressure on the box, the deformation of the box is reduced due to the restraint of the crimping piece, thereby reducing the requirements for the structural strength of the box beam and reducing the risk of box failure.

[0063] The battery of the present application is applied to electrical devices to alleviate the inconvenience of setting up steel pressure strips due to the connection of the bars, thereby failing to effectively reduce the deformation of the box beam, reduce the requirements for the structural strength of the box beam, and reduce the risk of box failure.

[0064] The battery disclosed in the embodiments of the present application can be used in, but is not limited to, electrical devices such as vehicles, ships, or aircraft.

[0065] For the convenience of description, the following embodiments are described by taking a vehicle 1000 as an example of an electrical device according to an embodiment of the present application.

[0066] Please refer to Figure 1 , Figure 1 A schematic diagram of the structure of a vehicle 1000 provided for some embodiments of the present application. The vehicle 1000 may be a fuel vehicle, a gas vehicle or a new energy vehicle, and the new energy vehicle may be a pure electric vehicle, a hybrid vehicle or an extended-range vehicle, etc. A battery 100 is provided inside the vehicle 1000, and the battery 100 may be provided at the bottom, head or tail of the vehicle 1000. The battery 100 may be used to power the vehicle 1000, for example, the battery 100 may be used as an operating power source for the vehicle 1000. The vehicle 1000 may also include a controller 200 and a motor 300, and the controller 200 is used to control the battery 100 to power the motor 300, for example, for starting, navigating and driving the vehicle 1000.

[0067] In some embodiments of the present application, the battery 100 can not only serve as an operating power source for the vehicle 1000, but also serve as a driving power source for the vehicle 1000, replacing or partially replacing fuel or natural gas to provide driving power for the vehicle 1000.

[0068] Please refer to Figure 2 , Figure 2An exploded view of a battery 100 provided in some embodiments of the present application. The battery 100 includes a box 10 and a battery cell 20, and the battery cell 20 is contained in the box 10. Among them, the box 10 is used to provide a storage space for the battery cell 20, and the box 10 can adopt a variety of structures. In some embodiments, the box 10 may include a first part 11 and a second part 12, the first part 11 and the second part 12 cover each other, and the first part 11 and the second part 12 jointly define a storage space for accommodating the battery cell 20. The second part 12 may be a hollow structure with one end open, the first part 11 may be a plate-like structure, and the first part 11 covers the open side of the second part 12, so that the first part 11 and the second part 12 jointly define a storage space; the first part 11 and the second part 12 may also be hollow structures with one side open, and the open side of the first part 11 covers the open side of the second part 12. Of course, the box 10 formed by the first part 11 and the second part 12 may be in a variety of shapes, such as a cylinder, a cuboid, etc.

[0069] In the battery 100, there can be multiple battery cells 20, and the multiple battery cells 20 can be connected in series, in parallel, or in mixed connection. Mixed connection means that the multiple battery cells 20 are both connected in series and in parallel. The multiple battery cells 20 can be directly connected in series, in parallel, or in mixed connection, and then the whole formed by the multiple battery cells 20 is accommodated in the box 10.

[0070] Each battery cell 20 may be a secondary battery or a primary battery, or a lithium-sulfur battery, a sodium-ion battery, or a magnesium-ion battery, but is not limited thereto. The battery cell 20 may be cylindrical, flat, rectangular, or in other shapes.

[0071] Please refer to Figure 3 , Figure 3 The schematic diagram of the exploded structure of the battery cell 20 provided in some embodiments of the present application. The battery cell 20 refers to the smallest unit that constitutes the battery. Figure 3 The battery cell 20 includes an end cover 21, a shell 22, a battery cell assembly 23 and other functional components.

[0072] The end cap 21 refers to a component that covers the opening of the shell 22 to isolate the internal environment of the battery cell 20 from the external environment. Without limitation, the shape of the end cap 21 can be adapted to the shape of the shell 22 to match the shell 22. Optionally, the end cap 21 can be made of a material with a certain hardness and strength (such as aluminum alloy), so that the end cap 21 is not easy to deform when it is squeezed and collided, so that the battery cell 20 can have a higher structural strength and the safety performance can also be improved. Functional components such as electrode terminals 211 can be provided on the end cap 21. The electrode terminal 211 can be used to electrically connect with the battery cell assembly 23 to output or input the electrical energy of the battery cell 20. In some embodiments, the end cap 21 can also be provided with a pressure relief mechanism for releasing the internal pressure when the internal pressure or temperature of the battery cell 20 reaches a threshold. The material of the end cap 21 can also be a variety of materials, such as copper, iron, aluminum, stainless steel, aluminum alloy, plastic, etc., and the embodiment of the present application does not impose any special restrictions on this. In some embodiments, an insulating member may be provided inside the end cap 21, and the insulating member may be used to isolate the electrical connection components in the housing 22 from the end cap 21 to reduce the risk of short circuit. For example, the insulating member may be plastic, rubber, or the like.

[0073] The shell 22 is a component used to cooperate with the end cover 21 to form the internal environment of the battery cell 20, wherein the formed internal environment can be used to accommodate the battery cell assembly 23, electrolyte and other components. The shell 22 and the end cover 21 can be independent components, and an opening can be set on the shell 22, and the internal environment of the battery cell 20 is formed by covering the opening with the end cover 21 at the opening. Without limitation, the end cover 21 and the shell 22 can also be integrated. Specifically, the end cover 21 and the shell 22 can form a common connection surface before other components are put into the shell, and when the interior of the shell 22 needs to be encapsulated, the end cover 21 covers the shell 22. The shell 22 can be of various shapes and sizes, such as a rectangular parallelepiped, a cylindrical shape, a hexagonal prism, etc. Specifically, the shape of the shell 22 can be determined according to the specific shape and size of the battery cell assembly 23. The material of the shell 22 can be various, such as copper, iron, aluminum, stainless steel, aluminum alloy, plastic, etc., and the embodiment of the present application does not impose any special restrictions on this.

[0074] The cell assembly 23 is a component in the battery cell 20 where electrochemical reactions occur. One or more cell assemblies 23 may be included in the housing 22. The cell assembly 23 is mainly composed of positive and negative electrode materials, a separator, and a current collector 231. Specifically, the positive electrode material is coated on the battery output electrode connector to form a positive electrode sheet, and the negative electrode material is coated on the battery output electrode connector to form a negative electrode sheet. The positive electrode sheet and the negative electrode sheet are wound or stacked, and the separator is arranged between the positive electrode sheet and the negative electrode sheet to form a cell assembly 23. The parts of the positive electrode sheet and the negative electrode sheet with active materials constitute the main body of the cell assembly, and the parts of the positive electrode sheet and the negative electrode sheet without active materials each constitute a pole ear. The positive pole ear and the negative pole ear may be located together at one end of the main body or respectively at both ends of the main body. During the charge and discharge process of the battery, the positive electrode active material and the negative electrode active material react with the electrolyte, and the pole ears connect the electrode terminals to form a current loop.

[0075] Figure 4 is a schematic diagram of the structure of a battery according to one or more embodiments, Figure 5 for Figure 4 See the attached diagram for a top view of the battery structure. Figure 4 and Figure 5 , the embodiment of the present application provides a battery 100, including a box 10, a battery cell group 30 and a crimping member 40. The box 10 includes a first beam 13, the battery cell group 30 includes a first battery cell group 31 and a second battery cell group 32 arranged adjacently along the first direction, the first battery cell group 31 and the second battery cell group 32 both include a plurality of battery cells 20 stacked along the second direction, the first battery cell group 31 includes a first surface 311, the second battery cell group 32 includes a second surface 321, the first surface 311 and the second surface 321 are adjacent to each other along the first direction and are both perpendicular to the third direction, and the first direction, the second direction and the third direction are mutually perpendicular. The crimping member 40 is arranged at the junction of the first surface 311 and the second surface 321 to simultaneously connect to the first surface 311 and the second surface 321. Among them, the first beam 13 is located at one end of the first battery cell group 31 and the second battery cell group 32 along the second direction, and the crimping member 40 extends along the second direction and is spaced apart from the first beam 13. The battery 100 further includes a first electrical connector 50 for electrically connecting the first battery cell group 31 and the second battery cell group 32 . At least a portion of the first electrical connector 50 is located at a gap between the crimping member 40 and the first beam 13 .

[0076] Specifically, the first direction is Figure 4 The Y direction is shown, and the second direction is Figure 4 The X direction is shown, and the third direction is Figure 4 The Z direction is shown.

[0077] The first surface 311 of the first battery cell group 31 may be the upper surface of the first battery cell group 31 along the third direction, and the first surface 311 may be formed by combining the upper surfaces of each battery cell 20 along the third direction of the first battery cell group 31. The upper surface of the battery cell 20 along the third direction may be the top surface of the end cover 21 of the battery cell 20. Similarly, the second surface 321 of the second battery cell group 32 may be the upper surface of the second battery cell group 32 along the third direction, and the second surface 321 may be formed by combining the upper surfaces of each battery cell 20 along the third direction of the second battery cell group 32.

[0078] The crimping member 40 refers to a structure that can provide a clamping force to an object. In the present application, the crimping member 40 is disposed at the junction of the first surface 311 and the second surface 321 to be simultaneously connected to the first surface 311 and the second surface 321, thereby providing a clamping force to the first battery cell group 31 and the second battery cell group 32. The crimping member 40 can be pressed against the first surface 311 and the second surface 321 along a third direction and connected to the first surface 311 and the second surface 321.

[0079] The connection between the crimping piece 40 and the first surface 311 and the second surface 321 can be a connection to the entire surface of the first surface 311 and the second surface 321, or a connection to a partial surface of the first surface 311 and the second surface 321. For example, the crimping piece 40 is only connected to the partial surface at both ends and the partial surface in the middle of the first surface 311 and the second surface 321 along the second direction.

[0080] The first beam 13 is a part of the box body 10 , and can be used as a side wall of the box body 10 , or as a middle beam inside the box body 10 .

[0081] The crimping member 40 is spaced apart from the first beam 13 along the second direction, which means that the crimping member 40 is spaced apart from the first beam 13 along the second direction to form a spacing space.

[0082] The first electrical connector 50 may be a connecting bar, which is used to connect adjacent first battery cell groups 31 and second battery cell groups 32 in series or in parallel. Specifically, the first electrical connector 50 is used to electrically connect a battery cell 20 of the first battery cell group 31 that is closest to the first beam 13 along the second direction, and a battery cell 20 of the second battery cell 32 that is closest to the first beam 13 along the second direction. At least a portion of the first electrical connector 50 is located in the above-mentioned spacing space.

[0083] In this way, by arranging at least a portion of the first electrical connector 50 to be located at the interval between the crimping piece 40 and the first beam 13, the crimping piece 40 can avoid the first electrical connector 50, so that the crimping piece 40 is not interfered by the position of the first electrical connector 50; and, by arranging the crimping piece 40 to be simultaneously connected to the first surface 311 of the adjacent first battery cell group 31 and the second surface 321 of the second battery cell group 32, it is possible to connect the battery cells 20 of the two adjacent battery cell groups 30, and each battery cell 20 can be fixed and limited, so that when the battery cell 20 expands and applies pressure to the box body 10, due to the restraint of the crimping piece 40, the deformation of the box body 10 is reduced, the requirements for the structural strength of the box body beam are reduced, and the risk of failure of the box body 10 is reduced.

[0084] Combination Figure 6 and Figure 7 According to some embodiments of the present application, the crimping member 40 is bonded to the first surface 311 and the second surface 321 .

[0085] The crimping member 40 can be bonded to the first surface 311 and the second surface 321 by means of an adhesive or an adhesive. It should be noted that the materials of the adhesive and the adhesive should be insulating, and the adhesive can be a double-sided adhesive. In this way, the crimping member 40 can be insulated from the battery cell 20 by means of the adhesive, thereby improving the reliability of the battery 100.

[0086] Since the crimping member 40 is bonded to the first surface 311 and the second surface 321 , the bonding operation is simple and reliable, and is also beneficial to the fixation and positioning of the battery cells 20 .

[0087] According to some embodiments of the present application, the first battery cell group 31 includes a first battery cell directly connected to the first electrical connector 50, and the second battery cell group 32 includes a second battery cell directly connected to the first electrical connector 50, and when projected along a third direction, the crimping member 40 is completely misaligned with the first battery cell and / or the second battery cell.

[0088] The projection of the crimping member 40 and the first battery cell and / or the second battery cell along the third direction may refer to the projection toward the box body 10 along the third direction.

[0089] When projected along the third direction, the crimping member 40 is completely misaligned with the first battery cell and / or the second battery cell, which means that the first projection area formed by the crimping member 40 is staggered with the second projection area formed by the first battery cell and / or the third projection area formed by the second battery cell without overlapping.

[0090] That is, the crimping member 40 is not located above the first battery cell and / or the second battery cell along the third direction, thereby providing sufficient spacing space between the crimping member 40 and the first beam 13 for placing the first electrical connector 50, so that the first battery cell and / or the second battery cell have a larger contact area with the first electrical connector 50, thereby improving the reliability of the electrical connection.

[0091] According to some embodiments of the present application, the crimping member 40 is made of epoxy resin and glass fiber composite material.

[0092] The crimping piece 40 made of epoxy resin glass fiber composite material has insulating properties and can maintain insulation between the battery cell 20, thereby improving the reliability of the battery 100. In addition, the crimping piece 40 made of epoxy resin glass fiber composite material has high strength and toughness, thereby improving the crimping effect.

[0093] According to some embodiments of the present application, the battery cell group 30 further includes a third battery cell group 33 and a fourth battery cell group 34, and the battery 100 further includes a separator, the third battery cell group 33 and the first battery cell group 31 are arranged on both sides of the separator relatively along the second direction, and the fourth battery cell group 34 and the second battery cell group 32 are arranged on both sides of the separator relatively along the second direction. The third battery cell group 33 includes a third surface 331, and the fourth battery cell group 34 includes a fourth surface 341, and the third surface 331 and the fourth surface 341 are adjacent to each other along the first direction and are both perpendicular to the third direction. The crimping member 40 extends along the second direction and crosses the separator to connect to the third surface 331 and the fourth surface 341.

[0094] A separator is a component used to separate at least two objects. In the embodiments of the present application, the separator may be a part of the box 10, for example, the separator may be a beam structure inside the box 10 that strengthens the structural strength of the box 10, such as the second beam 15 described in the following embodiment. It may also be a component with other functions, such as electrical separation and heat insulation separation used for the operational reliability of the battery 100.

[0095] The third surface 331 of the third battery cell group 33 may be the upper surface of the third battery cell group 33 along the third direction, and the third surface 331 may be formed by combining the upper surfaces of each battery cell 20 along the third direction of the third battery cell group 33. The upper surface of the battery cell 20 along the third direction may be the top surface of the end cover 21 of the battery cell 20. Similarly, the fourth surface 341 of the fourth battery cell group 34 may be the upper surface of the fourth battery cell group 34 along the third direction, and the fourth surface 341 may be formed by combining the upper surfaces of each battery cell 20 along the third direction of the fourth battery cell group 34.

[0096] The connection method between the crimping part 40 and the third surface 331 and the fourth surface 341 is not limited to bonding, and the connection between the crimping part 40 and the third surface 331 and the fourth surface 341 can be connected to the entire surface of the third surface 331 and the fourth surface 341, or can be connected to a portion of the surface of the third surface 331 and the fourth surface 341. For example, the crimping part 40 is only connected to the partial surface at both ends and the partial surface in the middle of the third surface 331 and the fourth surface 341 along the second direction.

[0097] In this embodiment, since the crimping member 40 can cross the partition, the extension of the crimping member 40 is not affected by the position of the partition. The crimping member 40 can simultaneously press and connect four adjacent battery cell groups 30, thereby improving the crimping efficiency.

[0098] See also Figure 6 Furthermore, the box body 10 also includes a carrier, which is used to support the battery cell group 30, and the partition includes a first wall away from the carrier along a third direction, and the minimum distance D1 between the third surface 331 and / or the fourth surface 341 and the carrier is greater than or equal to the minimum distance D2 between the first wall and the carrier.

[0099] The first wall surface of the partition may be an upper surface of the partition along the third direction.

[0100] In this way, the third surface 331 and / or the fourth surface 341 can be higher than or equal to the first wall of the partition. When the crimping component 40 extends along the second direction and crosses the partition, the crimping component 40 is bent and can directly cross the top of the partition in a straight line, thereby simplifying the overall structure of the crimping component 40.

[0101] In other embodiments, the partition may also include an avoidance groove opening toward the third direction, and at least a portion of the crimping member 40 is located in the avoidance groove.

[0102] Specifically, an avoidance groove may be formed on a surface of the partition that is located on the same side as the third surface 331 and the fourth surface 341 along the third direction.

[0103] When the crimping member 40 extends along the second direction and crosses over the partition, since the crimping member 40 is provided with an escape groove, the crimping member 40 can be directly partially located in the escape groove in a straight line to cross over, thereby simplifying the overall structure of the crimping member 40.

[0104] It should be noted that the avoidance grooves may be provided when the maximum distance between the third surface 331 and / or the fourth surface 341 and the bearing member is smaller than the minimum distance D2 between the first wall and the bearing member.

[0105] See also Figure 5 , Figure 6 and Figure 8 According to some embodiments of the present application, the battery cell group 30 also includes a third battery cell group 33 and a fourth battery cell group 34, the box body 10 also includes a second beam 15 and a third beam 16, the third battery cell group 33 and the first battery cell group 31 are arranged on both sides of the second beam 15 relatively along the second direction, the fourth battery cell group 34 and the second battery cell group 32 are arranged on both sides of the second beam 15 relatively along the second direction, and the third beam 16 is located at one end of the third battery cell group 33 and the fourth battery cell group 34 away from the second beam 15 along the second direction.

[0106] The second beam 15 is located between the first beam 13 and the third beam 16 along the second direction, and can be used as the middle beam of the box body 10, and the third beam 16 and the first beam 13 can be used as the side walls of the box body 10. Of course, in other embodiments, the third beam 16 and the first beam 13 can also be beam structures located in the box body 10.

[0107] By providing the second beam 15 between the third battery cell group 33 and the first battery cell group 31 and between the fourth battery cell group 34 and the second battery cell group 32 , the structural strength of the box body 10 can be improved when the number of battery cells 20 of the battery 100 is large, thereby improving the anti-expansion effect of the box body 10 .

[0108] Further, the third battery cell group 33 includes a third surface 331, and the fourth battery cell group 34 includes a fourth surface 341. The third surface 331 and the fourth surface 341 are adjacent to each other along the first direction and are both perpendicular to the third direction. The battery 100 also includes a locking crimping member 60, which is disposed at the junction of the third surface 331 and the fourth surface 341 to simultaneously connect to the third surface 331 and the fourth surface 341, and the two ends of the locking crimping member 60 are respectively connected to the second beam 15 and the third beam 16.

[0109] The difference between the locking crimping piece 60 and the crimping piece 40 is that the two ends of the locking crimping piece 60 can form a connection relationship with the box body 10 to achieve locking. Specifically, the connection relationship between the two ends of the locking crimping piece 60 and the second beam 15 and the third beam 16 can be bolted or welded.

[0110] Since the third battery cell group 33 and the fourth battery cell group 34 are arranged opposite to the first battery cell group 31 and the second battery cell group 32 along the second direction, that is, the third battery cell group 33 and the first battery cell group 31 are in a row, and the fourth battery cell group 34 and the second battery cell group 32 are in an adjacent row, the first electrical connection portion 50 can be set only at one end between the two rows of battery cell groups 24, that is, the first electrical connection portion 50 is set at one end of the first battery cell group 31 and the second battery cell group 32 away from the third battery cell group 33 and the fourth battery cell group 34 along the second direction, and the first electrical connection portion 50 is not set at one end of the third battery cell group 33 and the fourth battery cell group 34 along the second direction away from the first battery cell group 31 and the second battery cell group 32.

[0111] Since it is no longer affected by the first electrical connection portion 50, the locking crimping piece 60 does not need to be avoided. In this way, the two ends of the locking crimping piece 60 can be connected to the second beam 15 and the third beam 16 respectively without forming a spacing space between the third beam 16. When the battery cells 20 of the third battery cell group 33 and the fourth battery cell group 34 expand and exert pressure on the second beam 15 and the third beam 16 of the box body 10, the deformation of the second beam 15 and the third beam 16 is reduced due to the restraint of the locking crimping piece 60, the requirements for the structural strength of the box body beam are reduced, and the risk of failure of the box body 10 is reduced.

[0112] According to some embodiments of the present application, the locking crimping member 60 includes a metal connector 61 and an insulating connector 62, the metal connector 61 is connected to the second beam 15 and the third beam 16, a portion of the insulating connector 62 is located between the third surface 331 and the metal connector 61, and a portion of the insulating connector 62 is located between the fourth surface 341 and the metal connector 61.

[0113] The metal connector 61 refers to a connector made of metal material, such as steel or aluminum alloy, etc. The insulating connector 62 refers to a connector made of insulating material, such as rubber, polyurethane rubber, plastic, etc.

[0114] Since the metal connector 61 has a better structural strength, the metal connector 61 is connected to the second beam 15 and the third beam 16, so that the structural strength of the box 10 can be better improved, thereby improving the anti-expansion effect. In addition, by arranging the insulating connector 62 between the third surface 331 of the third battery cell group 33 and the metal connector 61, and between the fourth surface 341 of the fourth battery cell group 34 and the metal connector 61, the metal connector 61 and the battery cell 20 can be insulated, thereby improving the reliability of the battery 100.

[0115] Furthermore, the insulating connector 62 is bonded to the third surface 331 and the fourth surface 341 .

[0116] The insulating connector 62 can be bonded to the third surface 331 and the fourth surface 341 by means of an adhesive or an adhesive. It should be noted that the materials of the adhesive and the adhesive should also be insulating, and the adhesive can be a double-sided adhesive.

[0117] By providing the insulating connector 62 bonded to the third surface 331 and the fourth surface 341 , the locking crimping member 60 can be in closer contact with the third battery cell group 30 and the fourth battery cell group 34 , thereby fixing and limiting each battery cell 20 and improving the pressing reliability.

[0118] According to some embodiments of the present application, the metal connector 61 is bonded to the insulating connector 62 .

[0119] By bonding, the metal connector 61 and the insulating connector 62 can be more tightly connected, thereby improving the insulation reliability.

[0120] According to some embodiments of the present application, the insulating connector 62 covers at least a portion of the metal connector 61 .

[0121] The insulating connector 62 covers at least a portion of the metal connector 61 , which means that along the circumference of the metal connector 61 , the insulating connector 62 covers at least a portion of the metal connector 61 .

[0122] Specifically, the insulating connector 62 can be an insulating layer coated on the metal connector 61. For example, it can be coated on the outer periphery of the metal connector 61 through a heat shrink process, or the sheet-shaped insulating connector 62 can be bonded and coated on the outer periphery of the metal connector 61 by bonding.

[0123] By providing the insulating connector 62 to cover at least a portion of the metal connector 61 , the position reliability between the insulating connector 62 and the metal connector 61 can be improved, thereby improving the insulation effect between the metal connector 61 and the battery cell 20 .

[0124] See also Figure 5~Figure 8According to some embodiments of the present application, the battery cell group 30 includes a plurality of first battery cell groups 31, a plurality of second battery cell groups 32, a plurality of third battery cell groups 33, and a plurality of fourth battery cell groups 34, all of which are the same in number. The plurality of first battery cell groups 31 and the plurality of second battery cell groups 32 are arranged alternately along the first direction, and the plurality of third battery cell groups 33 and the plurality of fourth battery cell groups 34 are arranged alternately along the first direction. Each first battery cell group 31 and each third battery cell group 33 are arranged on both sides of the second beam 15 in a manner opposite to each other along the second direction, and each second battery cell group 32 and each fourth battery cell group 34 are arranged on both sides of the second beam 15 in a manner opposite to each other along the second direction. The first beam 13 is located at one end of all the first battery cell groups 31 and all the second battery cell groups 32 away from the second beam 15 in the second direction.

[0125] A first battery cell group 31 and a second battery cell group 32 adjacent to each other along the first direction, a third battery cell group 33 opposite to the first battery cell group 31 along the second direction, and a fourth battery cell group 33 opposite to the second battery cell group 32 along the second direction are combined to form a sub-battery cell group. The battery cell group 30 includes at least two sub-battery cell groups adjacent to each other along the first direction.

[0126] The crimping member 40 includes a first crimping member 41 and a second crimping member 42 . The first crimping member 41 is disposed on one of the sub-battery monomer groups, and the second crimping member 42 and the locking crimping member 60 are disposed on the other sub-battery monomer group.

[0127] The first crimping member 41 is disposed at the junction of the first surface 311 of the first battery cell group 31 and the second surface 321 of a second battery cell group 32 adjacent thereto to simultaneously connect to the first surface 311 and the second surface 321. The first crimping member 41 extends along the second direction and is spaced apart from the first beam 13. The first electrical connector 50 is used to electrically connect the first battery cell group 31 and the second battery cell group 32, and at least a portion of the first electrical connector 50 is located at the space between the crimping member 40 and the first beam 13. The first crimping member 41 extends along the second direction and crosses the second beam 15 to connect to the third surface 331 and the fourth surface 341.

[0128] The second crimping member 42 is disposed at the junction of the first surface 311 of the first battery cell group 31 and the second surface 321 of a second battery cell group 32 adjacent thereto so as to be simultaneously connected to the first surface 311 and the second surface 321. The first crimping member 41 extends along the second direction and is spaced apart from the first beam 13. The first electrical connector 50 is used to electrically connect the first battery cell group 31 and the second battery cell group 32, and at least a portion of the first electrical connector 50 is located at the interval between the crimping member 40 and the first beam 13. The locking crimping member 60 is disposed at the junction of the third surface 331 and the fourth surface 341 so as to be simultaneously connected to the third surface 331 and the fourth surface 341, and the two ends of the locking crimping member 60 are respectively connected to the second beam 15 and the third beam 16.

[0129] In this way, a variety of crimping parts 40 and the modes of cooperation between the crimping parts 40 and the locking crimping parts 60 can be set in the battery 100. In addition to achieving the function of avoiding the first electrical connector 50, on the one hand, the first crimping part 40 can be used to simultaneously press and connect four adjacent battery cell groups 30, thereby improving the crimping efficiency. On the other hand, the cooperation between the second crimping part 40 and the locking crimping part 60 can reduce the deformation of the second beam 15 and the third beam 16, thereby reducing the requirements for the structural strength of the box beam and reducing the risk of failure of the box 10.

[0130] In addition, an embodiment of the present application further provides an electric device, comprising the battery 100 in any of the above embodiments. The battery 100 is used to provide electric energy.

[0131] By arranging at least a portion of the first electrical connector 50 to be located at the interval between the crimping member 40 and the first beam 13, the crimping member 40 can avoid the first electrical connector 50 and is not interfered by the position of the first electrical connector 50; and, by arranging the crimping member 40 to be simultaneously connected to the first surface 311 of the adjacent first battery cell group 31 and the second surface 321 of the second battery cell group 32, it is possible to connect the battery cells 20 of the two adjacent battery cell groups 30, and each battery cell 20 can be fixed and limited, so that when the battery cells 20 expand and exert pressure on the box body 10, due to the restraint of the crimping member 40, the deformation of the box body 10 is reduced, the requirements for the structural strength of the box body beam are reduced, and the risk of failure of the box body 10 is reduced.

[0132] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them; although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein by equivalents; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application, and they should all be included in the scope of the claims and specification of the present application. In particular, as long as there is no structural conflict, the various technical features mentioned in the various embodiments can be combined in any way. The present application is not limited to the specific embodiments disclosed herein, but includes all technical solutions that fall within the scope of the claims.

Claims

1. A battery, characterized in that: include: A box body, including a first beam; A battery cell group, comprising a first battery cell group and a second battery cell group adjacently arranged along a first direction, wherein the first battery cell group and the second battery cell group each comprise a plurality of battery cells stacked along a second direction, the first battery cell group comprises a first surface, the second battery cell group comprises a second surface, the first surface and the second surface are adjacently arranged along the first direction and are both perpendicular to a third direction, and the first direction, the second direction and the third direction are mutually perpendicular in pairs; as well as A crimping member, disposed at a location adjacent to the first surface and the second surface to be connected to the first surface and the second surface simultaneously; Wherein, the first beam is located at one end of the first battery cell group and the second battery cell group along the second direction, the crimping piece extends along the second direction and is spaced apart from the first beam, and the battery further includes a first electrical connector, which is used to electrically connect the first battery cell group and the second battery cell group, and at least a portion of the first electrical connector is located at the interval between the crimping piece and the first beam.

2. The battery according to claim 1, characterized in that The battery cell group also includes a third battery cell group and a fourth battery cell group, and the battery also includes a separator, the third battery cell group and the first battery cell group are relatively arranged on both sides of the separator along the second direction, the fourth battery cell group and the second battery cell group are relatively arranged on both sides of the separator along the second direction, the third battery cell group includes a third surface, the fourth battery cell group includes a fourth surface, the third surface and the fourth surface are adjacent to each other along the first direction and are both perpendicular to the third direction, and the crimping piece extends along the second direction and crosses the separator to be connected to the third surface and the fourth surface.

3. The battery according to claim 2, characterized in that The box body also includes a carrier, which is used to support the battery cell group. The partition includes a first wall away from the carrier along the third direction, and the minimum distance between the third surface and / or the fourth surface and the carrier is greater than or equal to the minimum distance between the first wall and the carrier.

4. The battery according to claim 2, characterized in that The partition comprises an escape groove opening toward the third direction, and at least a portion of the crimping member is located in the escape groove.

5. The battery according to claim 1, characterized in that The battery cell group also includes a third battery cell group and a fourth battery cell group, and the box body also includes a second beam and a third beam, the third battery cell group and the first battery cell group are relatively arranged on both sides of the second beam along the second direction, the fourth battery cell group and the second battery cell group are relatively arranged on both sides of the second beam along the second direction, and the third beam is located on a side of the third battery cell group and the fourth battery cell group away from the second beam along the second direction.

6. The battery according to claim 5, characterized in that The third battery cell group includes a third surface, the fourth battery cell group includes a fourth surface, the third surface and the fourth surface are adjacent to each other along the first direction and are both perpendicular to the third direction, the battery also includes a locking crimping piece, the locking crimping piece is arranged at the junction of the third surface and the fourth surface to be simultaneously connected to the third surface and the fourth surface, and both ends of the locking crimping piece are respectively connected to the second beam and the third beam.

7. The battery according to claim 6, characterized in that The locking crimping piece includes a metal connector and an insulating connector, the metal connector is connected to the second beam and the third beam, a portion of the insulating connector is located between the third surface and the metal connector, and a portion of the insulating connector is located between the fourth surface and the metal connector.

8. The battery according to claim 7, characterized in that The insulating connector is bonded to the third surface and the fourth surface.

9. The battery according to claim 8, characterized in that The metal connecting piece is bonded to the insulating connecting piece.

10. The battery according to claim 8, characterized in that The insulating connector covers at least a portion of the metal connector.

11. The battery according to claim 1, characterized in that The crimping member is bonded to the first surface and the second surface.

12. The battery according to claim 1, characterized in that The first battery cell group includes a first battery cell directly connected to the first electrical connector, the second battery cell group includes a second battery cell directly connected to the first electrical connector, and projected along the third direction, the crimping member is completely misaligned with the first battery cell and / or the second battery cell.

13. The battery according to claim 1, characterized in that The crimping piece is made of epoxy resin glass fiber composite material.

14. An electrical device, characterized in that: The invention comprises a battery as claimed in any one of claims 1 to 13, wherein the battery is used to provide electrical energy.

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