Battery and electric device

Abstract

The utility model discloses a battery and an electric device. The battery comprises a box body; the battery monomer row comprises a plurality of battery monomers arranged along a first direction, and the plurality of battery monomer rows are stacked along a second direction to form a battery monomer array and are placed in the box body; and the heat management component is arranged on one side of the plurality of battery monomers along the third direction and is used for exchanging heat with the battery monomers, and the first direction is vertical to the second direction and the third direction. Therefore, the situation that the thermal management component occupies the arrangement space of the battery monomers can be relieved, and the volume utilization rate of the battery monomers in the battery can be improved.

Description

Technical Field

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

[0002] New energy batteries are being used more and more widely in life and industry. For example, new energy vehicles equipped with batteries have been widely used. In addition, batteries are also being increasingly used in areas such as energy storage.

[0003] In application scenarios such as installing batteries in new energy vehicles, how to improve the volume utilization of battery cells in the battery is a technical direction that the industry continues to develop. Utility Model Content

[0004] In order to solve the above technical problems, the present application provides a battery capable of improving the overall volume utilization of the battery while taking into account the overall structural strength of the battery, and an electrical device using the battery to provide electrical energy.

[0005] This application is implemented through the following technical solutions.

[0006] One aspect of the present application provides a battery, comprising: a casing; a battery cell row, comprising a plurality of battery cells arranged along a first direction, wherein the plurality of battery cell rows are stacked along a second direction to form a battery cell array and placed in the casing; and a thermal management component, disposed on one side of the plurality of battery cells along a third direction for heat exchange with the battery cells, wherein the first direction is perpendicular to the second direction and the third direction.

[0007] Since the thermal management component is located on one side of the battery cell along the third direction, the situation where the thermal management component occupies the arrangement space of the battery cell can be alleviated, and the space in the battery case can be utilized as much as possible in the arrangement direction of the battery cells (first direction, second direction), which helps to improve the space utilization rate of the battery case space.

[0008] In some embodiments, at least one strip-shaped member is provided on a surface of the battery cell row that is away from the thermal management component along the third direction. The strip-shaped member extends along the first direction and is connected to at least one of the battery cells in the battery cell row.

[0009] Since a strip-shaped component extending along the arrangement direction of the battery cells is provided on the top surface of the battery cell row, the ability of the battery to withstand vibration and impact can be improved through the strip-shaped component, thereby reducing the number of beams in the battery box while taking into account the overall structural strength of the battery, further helping to improve the volume utilization of the battery cells in the battery, and also helping to reduce the overall weight and cost of the battery.

[0010] In some embodiments, the battery cell includes a first shoulder and a second shoulder, wherein the first shoulder and the second shoulder are respectively located on the surface of the battery cell having the electrode terminal side and on both sides of the electrode terminal, and the strip-shaped member is connected to the battery cell at the first shoulder and / or the second shoulder of the battery cell.

[0011] Since the strip-shaped member is located on the surface of the battery cell with the electrode terminal side and on both sides of the electrode terminal, the space around the electrode terminals in the battery cell row can be effectively utilized, which helps to improve the mechanical strength of the battery in withstanding vibration, impact, expansion, etc. without occupying the height space of the battery cell.

[0012] In some embodiments, in each of the battery cell rows, each of the first shoulders is connected in sequence, and each of the second shoulders is connected in sequence, and the battery includes: the strip-shaped member connected to the first shoulder of each of the battery cells in the battery cell row, and / or, the strip-shaped member connected to the second shoulder of each of the battery cells in the battery cell row.

[0013] The strip member may be arranged on the side where the first shoulder is located or the side where the second shoulder is located in the battery cell row, or on both the side where the first shoulder is located and the side where the second shoulder is located in the battery cell, so the strip member can be flexibly arranged according to the requirements for battery weight, mechanical strength, etc. Moreover, since the strip member is connected to the shoulder (first shoulder and / or second shoulder) of each battery cell in the battery cell row, the ability to withstand vibration, impact, expansion, etc. can be improved for each battery cell in the battery cell row, and then the entire battery cell row.

[0014] In some embodiments, the plurality of battery cell rows include a first battery cell row and a second battery cell row adjacent to each other along the second direction, the first battery cell row and the second battery cell row are close to or in contact with each other along the second direction, the first battery cell row and the second battery cell row jointly form a third shoulder, the third shoulder includes the first shoulders of the first battery cell row connected in sequence and the second shoulders of the second battery cell row adjacent to the first battery cell row connected in sequence, and the strip member is connected to both the first shoulder and the second shoulder in the third shoulder.

[0015] Since multiple rows of battery cells are arranged close to or in contact with each other, it helps to improve the volume utilization of the battery cells in the battery; since the strip-shaped member is connected to the third shoulder formed by two adjacent rows of battery cells along the second direction (i.e., the first shoulders connected in sequence and the second shoulders connected in sequence included in the third shoulder), the ability of the battery cell row and then the entire battery to withstand vibration, shock, expansion, etc. can be further improved.

[0016] In some embodiments, the connecting comprises bonding.

[0017] The strip-shaped component can be easily connected to the battery cell row by bonding. The operation is simple and time-saving, and it is not easy to damage the surface of the battery cell. It can reduce the risks of leakage, leakage of electricity, etc. caused by damage to the battery cell, and can also reduce the space occupied by the mechanical connection component.

[0018] In each of the battery cells, a side wall erected along the third direction is formed at the end edges of the first shoulder portion and the second shoulder portion on the sides close to each other, and the side wall is used to define a boundary of each of the first shoulder portion and the second shoulder portion.

[0019] Since the end edges of the first shoulder and the second shoulder that are close to each other form side walls erected along the third direction, the strip component can be easily aligned with the first shoulder and the second shoulder and installed in a suitable position even without additional positioning measures, which can reduce adverse conditions caused by misalignment of the strip component.

[0020] In some embodiments, along the third direction, heights of the first shoulder and the second shoulder of the battery cell are smaller than a height of the electrode terminal of the battery cell.

[0021] Since the height of the battery cell at the first shoulder and the second shoulder is smaller than the height at the electrode terminal, the height space between the first shoulder, the second shoulder and the top surface of the electrode terminal can be effectively utilized, which can suppress the additional increase in the height of the battery box or the additional increase in the amount caused by the strip-shaped component, which is conducive to miniaturization of the battery volume.

[0022] In some embodiments, the box body includes a frame, and beams extending in the same direction are provided in the space surrounded by the frame, and each of the battery cell rows is accommodated in the battery cell accommodating space surrounded by the frame and the beams.

[0023] Since the surface of the battery cell row is connected with a strip-shaped component that can increase the mechanical strength, it is possible to retain only a small number of cross beams and appropriately reduce the longitudinal beams while taking into account the overall mechanical strength of the battery, which helps to improve the volume utilization of the battery cell and reduce the overall weight and cost of the battery.

[0024] In some embodiments, the beam includes a first beam and a second beam, the first beam and the second beam are arranged in parallel, and the strip-shaped member includes a first strip-shaped member, and both ends of the first strip-shaped member are respectively connected to the first beam and the second beam.

[0025] Since the two ends of the first strip-shaped member are respectively connected to two parallel beams in the frame, the battery's ability to withstand vibration, impact, expansion, etc. can be improved, especially the expansion force of the battery cell in the extending direction of the first strip-shaped member.

[0026] In some embodiments, the first strip-shaped member includes a strip main body and a strip connecting portion provided at at least one end of the strip main body, the strip connecting portion includes a lap portion and a connecting head portion, the strip connecting portion is connected to one end of the strip main body at the lap portion and is connected to the first beam and / or the second beam at the connecting head portion.

[0027] Since the first strip-shaped member is connected to the first beam and the second beam via the connecting head, the connection strength can be improved, and the risk of the first strip-shaped member being torn due to stress concentration or the like can be reduced.

[0028] In some embodiments, the strip-shaped member further includes a second strip-shaped member different from the first strip-shaped member, and the first strip-shaped member and the second strip-shaped member extend along the same direction.

[0029] The second strip-shaped member is also connected to the surface of the battery cell row, so it also has the function of improving the rigidity of the battery cell row and improving the vibration and impact strength of the battery. In addition, since the strip-shaped member can include the first strip-shaped member and the second strip-shaped member, the two strip-shaped members can be arranged in different forms and flexibly combined to meet the mechanical strength requirements, the overall weight requirements of the battery, the cost requirements, etc., which is conducive to taking into account some or all of the above three requirements in a simple way.

[0030] In some embodiments, the first strip-shaped member and the second strip-shaped member are made of different materials and / or have different sizes.

[0031] By configuring the first strip member and the second strip member to be made of different materials and / or different sizes, the overall weight of the strip member can be reduced while taking into account the mechanical strength, thereby reducing the overall weight of the battery and helping to reduce the cost of the strip member.

[0032] In some embodiments, the first strip-shaped members and the second strip-shaped members are alternately arranged in the second direction, or the first strip-shaped members and the second strip-shaped members are symmetrically arranged about a symmetry axis along the first direction.

[0033] By alternately arranging the first strip member and the second strip member along the second direction (the direction in which the battery cells are stacked in sequence), it is helpful to strengthen the overall mechanical strength of the battery. By arranging the first strip member and the second strip member symmetrically along the first direction (the direction in which the battery cells are arranged into battery cell rows), it is helpful to evenly strengthen the overall mechanical strength of the battery.

[0034] In some embodiments, the first strip-shaped member comprises a strip-shaped member made of a steel strip.

[0035] Since the strip-shaped components made of steel strips have high impact strength, tensile strength and other strengths, they help to improve the mechanical strength of the battery to withstand vibration shock, expansion, etc.

[0036] In some embodiments, a surface of the first strip-shaped member has an insulating film or an insulating coating.

[0037] Since the first strip-shaped member has an insulating film or an insulating coating on its surface, it can be insulated from the first shoulder portion, the second shoulder portion, etc. of the battery cell.

[0038] In some embodiments, the second strip-shaped member comprises a strip-shaped member made of a fiber-reinforced resin composite material.

[0039] Since the strip-shaped member made of fiber-reinforced resin composite material has the advantage of being light in weight, it helps to reduce the overall weight of the battery while taking into account the overall mechanical strength of the battery. In addition, since the strip-shaped member made of fiber-reinforced resin composite material has good tensile strength, it helps to improve the mechanical strength of the battery to withstand expansion force.

[0040] The second aspect of the present application provides an electrical device, characterized in that the electrical device comprises the battery provided by the first aspect of the present application for providing electrical energy.

[0041] Since the overall volume utilization of the battery can be improved while taking into account the overall structural strength of the battery, for the electrical device, it helps to reduce the space used for arranging the battery and reduce the overall weight of the electrical device, or it can increase the total energy of the battery used in the electrical device to extend the charging interval of the electrical device.

[0042] Utility Model Effect

[0043] Through the present application, it is possible to provide a battery that improves the overall volume utilization of the battery while taking into account the overall structural strength of the battery, and an electrical device that uses the battery to provide electrical energy. BRIEF DESCRIPTION OF THE DRAWINGS

[0044] 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:

[0045] Figure 1 A schematic diagram of a vehicle using a battery as a power source provided in some embodiments of the present application;

[0046] Figure 2 A schematic diagram of a three-dimensional exploded structure of a battery provided in some embodiments of the present application;

[0047] Figure 3 A three-dimensional schematic diagram of a battery cell provided for some embodiments of the present application;

[0048] Figure 4 A schematic plan view of a battery provided in some embodiments of the present application with a cover removed;

[0049] Figure 5 A three-dimensional schematic diagram of a frame of a battery provided in some embodiments of the present application;

[0050] Figure 6 A three-dimensional schematic diagram of a battery frame provided for other embodiments of the present application;

[0051] Figure 7 A three-dimensional schematic diagram of a press strip provided in some embodiments of the present application;

[0052] Figure 8 A three-dimensional partial schematic diagram of a press strip provided in some embodiments of the present application;

[0053] Fig. 9 A three-dimensional partial schematic diagram of a pull rod provided in some embodiments of the present application;

[0054] Fig.10 A three-dimensional partial schematic diagram of a pull rod provided for other embodiments of the present application.

[0055] Description of Reference Numerals

[0056] 1000-Vehicle; 100-Battery; 100A-Battery Pack; 200-Controller; 300-Motor;

[0057] 101- bottom plate; 102- heat exchange plate;

[0058] 103-frame; 1031-first beam; 1032-second beam; 1033-frame; 1034-edge; 1035-mounting hole; 1036-third beam; 1037-longitudinal beam; 1038-mounting flange;

[0059] 104-battery cell; 1041-large surface of battery cell; 1042-side surface of battery cell; 1043-bottom surface of battery cell; 1044-top cover; 1045-electrode terminal; 1046-exhaust valve; 1047-first shoulder; 1048-second shoulder;

[0060] 105-connecting pipe; 1051-connecting pipe opening;

[0061] 106- busbar component;

[0062] 107-pressing strip; 1071-pressing strip main body; 1072-pressing strip connecting portion; 1072a-lapping portion; 1072b-connecting head; 1072c-long hole portion; 1072d-welding portion;

[0063] 108-bracket; 1081-bracket end face;

[0064] 109-BMS assembly; 110-high voltage box assembly; 111-electrical plug-in part; 112-cover body; 1121-mounting bolts; h1-height at shoulder; h2-height at electrode terminal; S-battery cell accommodating space. DETAILED DESCRIPTION

[0065] 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.

[0066] 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.

[0067] In the description of the embodiments of the present application, the technical terms "first", "second", "third", 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.

[0068] 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.

[0069] 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, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in this article generally indicates that the associated objects before and after are in an "or" relationship.

[0070] In the description of the embodiments of the present application, the orientation or position relationship indicated by technical terms such as "length", "width", "height", "up", "down", "left", "right", "vertical", "horizontal", "top", "bottom", "inside" and "outside" are based on the orientation or position relationship shown in the accompanying drawings. They 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, operated or used in a specific orientation. Therefore, they should not be understood as limitations on the embodiments of the present application.

[0071] 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.

[0072] In the description of the embodiments of the present application, unless otherwise clearly specified and limited, the technical term "contact" should be understood in a broad sense, and may be direct contact or contact through an intermediate medium layer. It may be contact with essentially no interaction force between the two contacting parties, or it may be contact with interaction force between the two contacting parties.

[0073] Below, this application is described in detail.

[0074] At present, new energy batteries are increasingly used in life and industry. New energy batteries are not only used in energy storage power systems such as hydropower, thermal power, wind power and solar power stations, but are also widely used in electric vehicles such as electric bicycles, electric motorcycles, electric cars, as well as in aerospace and other fields.

[0075] In many application scenarios, including the use of batteries in new energy vehicles, the volume utilization rate of battery cells in batteries has always attracted much attention. The industry generally believes that the higher the volume utilization rate of a battery, the more battery cells can be accommodated per unit volume. Therefore, improving the volume utilization rate of batteries is a technical direction that the industry continues to develop.

[0076] In existing batteries, there is a structure in which a heat exchange plate is arranged at the bottom of a battery cell to exchange heat with the battery cell. In such a structure, in order to meet the strength requirements of the battery to withstand vibration and impact, cross beams and longitudinal beams connected horizontally and vertically are arranged in the battery box, and the battery cells are arranged in the space separated by these cross beams and longitudinal beams. However, such a structure has the problem that the cross beams and longitudinal beams occupy a large amount of space in the battery box, thereby squeezing out the space for arranging the battery cells.

[0077] In addition, in existing batteries, there is also a structure that reduces the longitudinal beams in the battery box and uses a heat exchange plate that contacts the large surface of the battery cell. In such a structure, since the large surface heat exchange plate has the function of improving the overall strength of the box, even if the longitudinal beams are reduced, the strength requirements of the battery to withstand vibration and impact can be met. However, such a structure has the problem that the large surface heat exchange plate occupies a large amount of space in the battery box, thereby squeezing the space for arranging the battery cells.

[0078] In view of the above situation, how to further improve the volume utilization of battery cells while taking into account the overall strength of the battery is one of the technical issues to be solved in this application. Specifically, how to remove or reduce the longitudinal beams and large-surface heat exchange plates inside the box to further improve the volume utilization of the battery while taking into account the requirements for the mechanical strength of the battery such as bearing vibration and impact is one of the technical issues to be solved in this application.

[0079] In view of the problems existing in the above-mentioned prior art, the present application proposes a design concept: reducing the longitudinal beams in the battery and arranging the thermal management components such as the heat exchange plate at the bottom of the battery cell to provide as much space as possible for arranging the battery cells.

[0080] In addition, one or more strip-shaped members may be further fixed on the surface of the battery cell to enhance the mechanical strength of the battery cell row to withstand vibration, impact, expansion and deformation.

[0081] Based on such a design concept, the present application proposes a battery, which includes a case, a battery cell row and a thermal management component. The battery cell row includes a plurality of battery cells arranged along a first direction. The plurality of battery cell rows are stacked along a second direction to form a battery cell array and placed in the case. The thermal management component is arranged on one side of the plurality of battery cells along a third direction for heat exchange with the battery cells. The first direction is perpendicular to the second direction and the third direction.

[0082] Since the thermal management component is located on one side of the battery cell along the third direction, the situation where the thermal management component occupies the arrangement space of the battery cell can be alleviated, and the space in the battery case can be utilized as much as possible in the arrangement direction of the battery cells (first direction, second direction), which helps to improve the space utilization rate of the battery case space.

[0083] The battery provided in the embodiment of the present application can be used, but not limited to, in power storage systems, vehicles, ships, aircraft and other electrical devices. Since the battery can improve the overall volume utilization of the battery while taking into account the overall structural strength of the battery, it is helpful to reduce the space used to arrange the battery for the electrical device, reduce the overall weight of the electrical device, or increase the total energy of the battery used in the electrical device to extend the charging interval of the electrical device.

[0084] The embodiment of the present application also provides an electric device including the above-mentioned battery for providing electric energy, and the electric device may be, but is not limited to, a mobile phone, a tablet, a laptop, an electric toy, an electric tool, a battery car, an electric car, a ship, a spacecraft, etc. Among them, the electric toy may include a fixed or mobile electric toy, for example, a game console, an electric car toy, an electric ship toy, an electric airplane toy, etc., and the spacecraft may include an airplane, a rocket, a space shuttle, a spacecraft, etc.

[0085] In the following embodiments, for the convenience of description, the electric device of one embodiment of the present application is taken as a vehicle 1000 as an example for description. The following is a description with reference to the accompanying drawings.

[0086] Figure 1 The schematic diagram of the structure of a vehicle 1000 provided in 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. Figure 1As shown, a battery 100 is disposed inside the vehicle 1000, and the battery 100 can be disposed at the bottom, head, or tail of the vehicle 1000. The battery 100 can be used to power the vehicle 1000, for example, the battery 100 can 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 operating power requirements of the vehicle 1000 during driving.

[0087] 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.

[0088] The battery mentioned in the embodiments of the present application is a single physical module that can include multiple battery cells to provide higher voltage and capacity. Multiple battery cells can be connected in series, in parallel, or in mixed connection. Mixed connection means that multiple battery cells are connected in both series and in parallel.

[0089] In some embodiments, the battery may be a battery module, wherein a plurality of battery cells are arranged and fixed to form a battery module.

[0090] In some embodiments, the battery may be a battery pack. Multiple battery cells may be directly connected in series, parallel or mixed, and then the whole formed by the multiple battery cells may be accommodated in a storage space and used as a battery pack; in addition, the battery pack may also be a battery module formed by connecting multiple battery cells in series, parallel or mixed, and then the multiple battery modules may be connected in series, parallel or mixed to form a whole and used as a battery pack; of course, the battery pack also includes a case where there is only one battery module. In some of the following embodiments, such as Figure 1 and Figure 2 As shown, an example in which the battery 100 is a battery pack 100A will be described.

[0091] The battery pack 100A may further include other structures, for example, a busbar 106 for realizing electrical connection between the plurality of battery cells 104. In addition, the battery pack 100A may further include a heat exchange plate 102 for performing heat exchange with each battery cell 104.

[0092] In the embodiment of the present application, the battery cell may be a secondary battery. A secondary battery refers to a battery cell that can be continuously used by activating active materials by charging after the battery cell is discharged.

[0093] The battery cell can be a lithium ion battery, a sodium ion battery, a sodium lithium ion battery, a lithium metal battery, a sodium metal battery, a lithium sulfur battery, a magnesium ion battery, a nickel hydrogen battery, a nickel cadmium battery, a lead storage battery, etc., which is not limited in the embodiments of the present application.

[0094] Although not shown, the battery cell 104 generally includes an electrode assembly. The electrode assembly includes a positive electrode, a negative electrode, and a separator. During the charge and discharge process of the battery cell, active ions (such as lithium ions) are embedded and released back and forth between the positive electrode and the negative electrode. The separator is arranged between the positive electrode and the negative electrode to prevent the positive and negative electrodes from short-circuiting, while allowing active ions to pass through.

[0095] In some embodiments, the electrode assembly is provided with tabs (not shown), which can lead current out of the electrode assembly. The tabs include a positive tab and a negative tab.

[0096] In some embodiments, the battery cell may include a housing. The housing is used to encapsulate components such as the electrode assembly and the electrolyte. The housing may be a steel housing, an aluminum housing, a plastic housing (such as polypropylene), a composite metal housing (such as a copper-aluminum composite housing), or an aluminum-plastic film.

[0097] In some embodiments, at least one electrode terminal is disposed on the housing, and the electrode terminal is electrically connected to the tab. The electrode terminal may be directly connected to the tab, or indirectly connected to the tab via a transition component. The electrode terminal may be disposed on the end cap, or on the housing.

[0098] As an example, the battery cell can be a cylindrical battery cell, a prismatic battery cell, a soft-pack battery cell or a battery cell of other shapes. The prismatic battery cell includes a square shell battery cell, a blade-shaped battery cell, a polygonal battery, such as a hexagonal battery, etc. There is no special limitation in this application.

[0099] In some embodiments, the box of the battery pack can be used as part of the chassis structure of the vehicle. For example, part of the box can become at least a part of the floor of the vehicle, or part of the box can become at least a part of the crossbeam and longitudinal beam of the vehicle.

[0100] Below, refer to Figures 2 to 10 Some embodiments of the present application are described in detail.

[0101] Figure 2 A schematic diagram of a three-dimensional exploded structure of a battery provided in some embodiments of the present application; Figure 3 A three-dimensional schematic diagram of a battery cell provided for some embodiments of the present application; Figure 4 A schematic plan view of a battery provided in some embodiments of the present application with a cover removed; Figure 5 A three-dimensional schematic diagram of a frame of a battery provided in some embodiments of the present application; Figure 6 A three-dimensional schematic diagram of a battery frame provided for other embodiments of the present application; Figure 7 A three-dimensional schematic diagram of a press strip provided in some embodiments of the present application; Figure 8 A three-dimensional partial schematic diagram of a press strip provided in some embodiments of the present application; Fig. 9 A three-dimensional partial schematic diagram of a pull rod provided in some embodiments of the present application; Fig.10 A three-dimensional partial schematic diagram of a pull rod provided for other embodiments of the present application.

[0102] like Figure 2 and Figure 3 As shown, the battery pack 100A includes a box, a battery cell row and a thermal management component. The battery cell row includes a plurality of battery cells 104 arranged along a first direction, and a plurality of battery cell rows are stacked along a second direction to form a battery cell array and placed in the box. The thermal management component is disposed on one side of the plurality of battery cells 104 along a third direction for heat exchange with the battery cells 104. Here, the first direction is perpendicular to the second direction and the third direction.

[0103] The box body is used to at least accommodate a battery cell array formed by arranging a plurality of battery cells along a first direction and a second direction, and generally includes a receiving space, which can be closed by a bottom plate, a cover body, etc. In some embodiments, Figure 2 As shown, the box body includes a frame 103, and the space surrounded by the frame 103 is a battery cell accommodating space S.

[0104] The thermal management component is usually used to cool or heat the battery cell. The specific structure of the thermal management component is diverse, for example, it can be a plate-type structure, it can be a structure with a heat exchange medium flow channel inside, it can be an integrated structure, or it can be a split structure. In a specific embodiment, the thermal management component includes: Figure 2 The heat exchange plate 102 is shown. Hereinafter, the heat exchange plate 102 is taken as an example for description, but the thermal management component should be understood to include but not limited to the heat exchange plate 102.

[0105] Specifically, the battery pack 100A includes a frame 103 as a box body, a plurality of battery cell rows in a space surrounded by the frame 103, and a heat exchange plate 102 between the battery cells and the bottom plate 101. The heat exchange plate 102 is located at the bottom of the frame 103 as a box body (one side of the frame 103 in the third direction Z) and is fixed to the frame 103.

[0106] In some embodiments of the present application, for the convenience of description, a first direction, a second direction, and a third direction are set, and the first direction, the second direction, and the third direction are directions that intersect each other. Figures 2 to 6 In the illustrated embodiment, the first direction, the second direction, and the third direction are perpendicular to each other. However, those skilled in the art should understand that the embodiments of the present application are not limited to the case where the three directions are perpendicular to each other. Figure 2 , Figure 3As shown by the arrows in , the direction of arrow X is the first direction X, the direction of arrow Y is the second direction Y, and the direction of arrow Z is the third direction Z.

[0107] In addition, Figures 2 to 6 In the illustrated embodiment, as a specific example, the direction indicated by the arrow Z is the top direction (also the direction away from the base plate 101), sometimes also referred to as "above", and the direction along the second direction Z in the opposite direction of the top direction is the bottom direction, sometimes also referred to as "below".

[0108] Since the thermal management components such as the heat exchange plate 102 are located on one side of the battery cell 104 along the third direction, the situation where the thermal management components occupy the arrangement space of the battery cell 104 can be alleviated, and the space in the battery case can be utilized as much as possible in the arrangement direction of the battery cell 104 (first direction X, second direction Y), which helps to improve the space utilization rate of the battery case space.

[0109] In some embodiments, Figure 2 and Figure 3 As shown, at least one strip member is provided on a surface of the battery cell row away from the thermal management component along the third direction Z. The strip member extends along the first direction X and is connected to at least one battery cell 104 in the battery cell row.

[0110] Specifically, at least one strip-shaped member is provided on the surface of the battery cell row away from the heat exchange plate 102 along the third direction Z. The strip-shaped member extends along the first direction X and is connected to at least one battery cell 104 in the battery cell row.

[0111] like Figure 2 As shown, the bottom plate 101 is located at the bottom of the battery pack 100A, and plays the role of sealing or supporting the frame 103 (described later) of the battery pack 100A from the bottom; it can also play the role of protecting the heat exchange plate 102. Although not clearly shown in the figure, the bottom plate 101 is installed on the edge portion 1034 of the frame 103 by screw fastening, etc. The material of the bottom plate 101 can be, for example, metal, resin, or other suitable materials.

[0112] like Figure 2 As shown, a heat exchange plate 102 is provided above the bottom plate (in the direction indicated by arrow Z). The heat exchange plate 102 is used to perform heat exchange with each battery cell above it (in the direction indicated by arrow Z). In some embodiments, a heat exchange medium flow path for heat exchange medium to flow is formed inside the heat exchange plate 102. The heat exchange medium flow path can be, for example, Figure 2 and Figure 3 The connection pipe port 1051 of the connection pipe 105 as shown is connected to a heat exchange medium supply source or other heat exchange medium flow path.

[0113] The heat exchange medium mentioned in the embodiments of the present application is a fluid used for heat exchange with battery cells in pipelines. The so-called heat exchange refers to the use of the temperature difference between the heat exchange medium and the surroundings of each battery cell to achieve heat transfer so as to reduce the temperature difference between the heat exchange medium and the battery cell. It can be used to heat up the battery cell or to cool down the battery cell. In some embodiments of the present application, the case of adjusting the temperature of the battery cell by using the temperature difference between the liquid heat exchange medium and the surroundings of each battery cell is used as an example. In some embodiments, the heat exchange medium is called a coolant or refrigerant, which is mainly used to cool the battery cell. As a coolant, a suitable coolant can be selected according to the specific situation. As specific examples, ethylene glycol solutions, water, etc. can be cited.

[0114] The heat exchange plate 102 and the bottom plate 101 are fixed by bonding with a heat conductive structural adhesive or the like. This can fix the relative position of the heat exchange plate 102 with respect to the bottom plate 101 and facilitate heat transfer between the heat exchange plate 102 and the bottom plate 101. Here, as the heat conductive structural adhesive, for example, commercially available polyurethane heat conductive structural adhesive, heat conductive silica gel, etc. can be used.

[0115] The heat exchange plate 102 can be fastened or welded to the frame 103 (described later) from below, for example, it can be fastened to the mounting flange 1038 of the frame 103 by bolts or the like. In addition, although not explicitly shown in the figure, the heat exchange plate 102 can also be fastened or welded to the cross beams (for example, the first beam 1031 and the second beam 1032 described later) in the frame.

[0116] A plurality of battery cells 104 are arranged above the heat exchange plate 102. The battery cells 104 are arranged into one or more battery cell rows. Figure 2 and Figure 4 An example of 6 battery cell rows is shown in FIG. 1 , however, the number of battery cell rows is not limited to 6, and may be less than 6, such as 2, 3, 4, or more than 6.

[0117] In addition, Figure 2 and Figure 4 In the illustrated embodiment, a plurality of battery cells 104 are arranged with their major surfaces facing the first direction X and their side surfaces facing the second direction Y. However, the battery cells 104 may also be arranged in other orientations. For example, the major surfaces of the battery cells 104 may be facing the second direction Y and their side surfaces facing the first direction X. The battery cells 104 may also be arranged with their major surfaces (e.g., the major surfaces of cylindrical batteries) facing the second direction Z.

[0118] All battery cells 104 are bonded to the heat exchange plate 102 by, for example, a heat conductive structural adhesive. In this way, each battery cell can be fixed.

[0119] Combination Figure 3 , taking a square box battery as an example, the battery cell 104 is described in detail. Figure 3 As shown, each battery cell 104 includes a battery cell large surface 1041, a battery cell side surface 1042, a battery cell bottom surface 1043 and a top cover 1044. On the top cover 1044, two electrode terminals 1045 are exposed to the outside. On the top cover 1044, an exhaust valve 1046 is provided between the two electrode terminals 1045. On the top surface side of the battery cell 104, two shoulders 1047 and 1048 (described later) are provided at positions avoiding the electrode terminals 1045. In addition, as shown in FIG. Figure 2 and Figure 4 As shown, a busbar component 106 for electrically connecting the electrode terminals 1045 of adjacent battery cells 104 is also provided on the top surface of the battery cell 104. Here, the short strip-shaped busbar component 106 is only an example, and the busbar component can also adopt other forms.

[0120] The shape of the battery cell 104 is not limited to the above-mentioned square box shape, and other shapes of batteries, such as cylindrical batteries, prismatic batteries, etc., are also applicable to the present application.

[0121] In addition, if Figure 2 and Figure 4 As shown, in the box formed by the frame 103, in addition to the above-mentioned multiple battery cells 104, there is also a BMS (Battery Management System) component 109 for monitoring the battery status and exchanging information with the electrical device, a high-voltage box component 110 for connecting the voltage provided by the multiple battery cells 104 to the electrical device and / or charging the multiple battery cells 104 from a charging device, and an electrical plug part 111 including a high-voltage connection port and a low-voltage connection port.

[0122] In addition, if Figure 2 As shown, the battery further includes a cover 112, which is used to close the box formed by the frame 103 from above, so that the cover 112, the frame 103 and the bottom plate 101 can form an outer shell of the battery pack 100A.

[0123] like Figure 2 , Figure 4 As shown, the battery pack 100A further includes a strip-shaped member, which extends along the first direction X (which is also the direction in which the battery cells 104 are arranged into a battery cell row). The strip-shaped member can be configured as a long strip with a certain cross section, where the cross section can be a triangle, a rectangle, a square or other quadrilateral, or a polygon (e.g. Fig. 9 The shape with a raised portion in the middle, or Fig.10The overall shape shown is "concave" (shaped like a Chinese character "concave"), which can be designed according to specific circumstances.

[0124] Here, the strip component can be one strip component or several strip components. When there are several strip components, the strip components can be the same one or two or more slightly different ones. In some embodiments of the present application, the strip component can be divided into two strip components with different shapes, and the details are described later.

[0125] like Figure 2 and Figure 4 As shown, the strip-shaped member overlaps with at least one battery cell in the battery cell row in the third direction Z. In the overlapping area, the strip-shaped member is connected to at least one battery cell. Here, the area of ​​the battery cell that overlaps with the strip-shaped member can be as follows: Figure 2 , Figure 4 As shown in the figure, the strip-shaped member is located on the same side as the electrode terminal 1045, or on the side without the electrode terminal 1045. For example, when the battery cells 104 are arranged with the large surface of the battery cells 104 facing the third direction Z, the strip-shaped member can overlap with the side surface 1042 of the battery cell. Figures 2 to 4 As shown, the area where the strip-shaped member overlaps with each battery cell 104 is located at a position avoiding the electrode terminal 1045 and the exhaust valve 1046 .

[0126] In addition, although the strip-shaped member has an overlapping area with each battery cell 104 in the battery cell row, it may be connected to only some of the battery cells 104 in the battery cell row. For example, it may be connected to several battery cells 104 with several battery cells 104 in between. However, from the perspective of improving the mechanical strength of the battery cell row to withstand vibration and impact, it is better for the strip-shaped member to be connected to each battery cell 104 it overlaps with.

[0127] Since the heat exchange plate 102 is located on one side of the battery cell row along the third direction, for example, between the battery cell row and the bottom plate 101, the situation in which the heat exchange plate 102 occupies the arrangement space of the battery cells 104 can be alleviated, and as much space as possible for arranging the battery cells 104 can be provided in the arrangement direction of the battery cells 104; and, since a strip component extending along the arrangement direction of the battery cells is provided on the surface of the battery cell row, the ability of the battery cell row to withstand vibration impact and expansion deformation can be improved through the strip component, thereby reducing the number of beams in the battery box while taking into account the overall structural strength of the battery, further contributing to improving the volume utilization rate of the battery cells in the battery, and also helping to suppress the overall weight and cost of the battery.

[0128] In some embodiments, Figures 2 to 4As shown, the battery cell 104 includes a first shoulder 1047 and a second shoulder 1048, and the first shoulder 1047 and the second shoulder 1048 are respectively located on the surface of the battery cell 104 having the electrode terminal 1045 side and on both sides of the electrode terminal 1045, and at the first shoulder 1047 and / or the second shoulder 1048 of the battery cell 104, the strip-shaped member is connected to the battery cell 104.

[0129] Here, the first shoulder 1047 and the second shoulder 1048 are two areas on the top surface of the battery cell 104. The two areas can be symmetrically arranged about the central axis of the battery cell 104 along the third direction Z, or can be offset relative to the central axis. In addition, the two areas can also be different in shape and / or size.

[0130] like Figure 3 As shown, the first shoulder 1047 and the second shoulder 1048 may be formed by setting the top cover 1044. Specifically, the top cover 1044 is set so that its length along the second direction Y is shorter than the distance between the two battery cell side surfaces 1042 of the battery cell 104 along the second direction Y. When such a top cover 1044 is assembled on the top surface of the battery cell 104, the top surface of the battery cell 104 is exposed on both sides of the top cover 1044, and the top surfaces of the battery cell 104 exposed at these two places may serve as the first shoulder 1047 and the second shoulder 1048.

[0131] The lengths of the first shoulder 1047 and the second shoulder 1048 along the second direction Y are configured to match the configured strip member so that the strip member can indeed contact the surface of the first shoulder 1047 and the second shoulder 1048. As a specific example, for example, the lengths of the first shoulder 1047 and the second shoulder 1048 along the second direction Y are both greater than or substantially the same as the width of the strip member along the second direction Y; or, the lengths of the first shoulder 1047 and the second shoulder 1048 along the second direction Y are both greater than or substantially the same as approximately half of the width of the strip member along the second direction Y. Of course, the lengths of the first shoulder 1047 and the second shoulder 1048 along the second direction Y can also be less than approximately half of the width of the strip member along the second direction Y. In this case, the strip member can be configured with a slight gap between the battery cell rows, so that the strip member can also contact the surface of the first shoulder 1047 and the second shoulder 1048.

[0132] In addition, since the first shoulder 1047 and the second shoulder 1048 are located on both sides of the electrode terminal 1045, the strip-shaped component can be placed in the space formed by the height difference between the first shoulder 1047, the second shoulder 1048 and the top surface of the electrode terminal 1045 (the surface away from the bottom plate 101 along the third direction Z). This can reduce the possibility of an increase in the height dimension of the battery pack 100A due to the strip-shaped component, or the height dimension of the battery pack 100A can be basically not increased.

[0133] Since the strip-shaped member is located on the surface of the battery cell 104 having the electrode terminal side and on both sides of the electrode terminal 1045, the space around the electrode terminal 1045 in the battery cell row can be effectively utilized, which helps to improve the mechanical strength of the battery in withstanding vibration, impact, expansion, etc. without occupying the height space of the battery cell.

[0134] In addition, it should be noted that the “first” and “second” in the first shoulder 1047 and the second shoulder 1048 are only used to distinguish the shoulders on both sides. Figure 4 For each battery cell 104, the shoulder on the upper side along the second direction Y is called the first shoulder, and the shoulder on the other side is called the second shoulder; of course, the reverse is also possible.

[0135] In some embodiments, Figure 2 and Figure 4 As shown, in each battery cell row, each first shoulder 1047 is connected in sequence, and each second shoulder 1048 is connected in sequence, and the battery 100 (battery pack 100A) includes: a strip member connected to the first shoulder 1047 of each battery cell 104 in the battery cell row, and / or, a strip member connected to the second shoulder 1048 of each battery cell 104 in the battery cell row.

[0136] like Figure 2 and Figure 4 As shown, for a column of battery cells, a first shoulder region formed by a plurality of first shoulders 1047 connected in sequence is formed on one side, and a second shoulder region formed by a plurality of second shoulders 1048 connected in sequence is formed on the other side. Figure 2 and Figure 4 Multiple rows of battery cells are shown, so there are multiple first shoulder areas and multiple second shoulder areas. Strip members can be set for some or all of the multiple first shoulder areas, and can also be set for some or all of the multiple second shoulder areas, or can also be set for both the first shoulder area and the second shoulder area. The area where the strip members are set, the number of strip members set, etc. are appropriately determined according to the specific situation (such as the desired weight of the battery pack 100A, the required strength requirements, the use environment of the battery pack 100A, etc.).

[0137] In addition, for the first shoulder region and / or the second shoulder region where the strip-shaped member is provided, the strip-shaped member is in surface contact with and connected to all shoulders in the shoulder region.

[0138] Since the strip-shaped member can be arranged on the side where the first shoulder 1047 or the side where the second shoulder 1048 is located in the battery cell row, or can be arranged on both the side where the first shoulder 1047 and the side where the second shoulder 1048 are located in the battery cell, the strip-shaped member can be flexibly arranged according to the requirements for battery weight, mechanical strength, etc. Moreover, since the strip-shaped member is connected to the shoulder (first shoulder 1047 and / or second shoulder 1048) of each battery cell 104 in the battery cell row, the ability to withstand vibration, impact, expansion, etc. can be improved for each battery cell 104 in the battery cell row, and then the entire battery cell row.

[0139] In some embodiments, Figure 2 and Figure 4 As shown, the battery 100 (battery pack 100A) includes a plurality of battery cell rows stacked along the second direction Y. The plurality of battery cell rows include a first battery cell row and a second battery cell row adjacent to each other along the second direction Y, and the first battery cell row and the second battery cell row are close to or in contact with each other along the second direction Y. The first battery cell row and the second battery cell row together form a third shoulder, and the third shoulder includes a first shoulder 1047 of the first battery cell row connected in sequence and a second shoulder 1048 of the second battery cell row adjacent to the first battery cell row connected in sequence. The strip member is connected to both the first shoulder 1047 and the second shoulder 1048 in the third shoulder.

[0140] Specifically, in Figure 2 and Figure 4 In the battery pack 100A shown, a plurality of battery cells 104 are arranged into battery cell rows along a first direction X, and a plurality of battery cell rows are stacked along a second direction Y. In order to improve the volume utilization of the battery cells, the adjacent battery cells 104 in each battery cell row are in close contact with each other. Figure 2 and Figure 4 In the specific example shown, the large surfaces 1041 of adjacent battery cells are in surface contact with each other; moreover, the adjacent rows of battery cells are also in close contact with each other. Figure 2 and Figure 4In the specific example shown, the side surfaces 1042 of adjacent battery cells are in surface contact with each other. This allows full use of the space in the battery pack 100A for arranging batteries, thereby improving the active utilization rate. It should be noted that the contact between adjacent battery cells 104 and the contact between adjacent rows of battery cells can be direct contact or contact via spacers. In addition, adjacent battery cells 104 can also be bonded to each other by adhesives, double-sided tapes, etc. For example, in Figure 2 and Figure 4 In the example shown, the large surfaces 1041 of the battery cells in each battery cell row may be bonded to each other, and every two adjacent battery cell rows along the second direction Y may be bonded to each other (the side surfaces 1042 of the battery cells may be bonded to each other).

[0141] A third shoulder is formed between the adjacent rows of battery cells arranged in close contact, formed by the first shoulder 1047 (or the first shoulder area) and the second shoulder 1048 (or the second shoulder area). The third shoulder forms a sunken space relative to the top cover 1044 adjacent to it on both sides, and the strip-shaped member can be arranged in the sunken space and contact and connect with the bottom plane surface in the sunken space.

[0142] In addition, adjacent rows of battery cells may not be in close contact, but may leave a small gap between them. In this case, a third shoulder having a wider dimension along the second direction Y may be provided to accommodate a wider strip-shaped member. The strip-shaped member is in surface contact and connection with the first shoulder 1047 (or the first shoulder region) and the second shoulder 1048 (or the second shoulder region) in the third shoulder, which are opposite to each other with a gap therebetween.

[0143] Since multiple battery cell rows are arranged close to or in contact with each other, it helps to improve the volume utilization of the battery cells in the battery; since the strip-shaped member is connected to the first shoulders 1047 and the second shoulders 1048 connected in sequence between two adjacent battery cell rows, the ability of the battery cell row and then the entire battery to withstand vibration, shock, expansion, etc. can be further improved.

[0144] In some embodiments, the connection between the strip-shaped member and the battery cell comprises bonding.

[0145] The strip-shaped member can be bonded to the first shoulder 1047 and / or the second shoulder 1048 by, for example, an adhesive. As for the adhesive, for example, commercially available structural adhesives such as polyurethane structural adhesives, acrylic structural adhesives, epoxy structural adhesives, etc. can be used, and other suitable adhesives can also be used. In addition, the strip-shaped member can also be bonded by double-sided tape.

[0146] The strip-shaped component can be easily connected to the battery cell row by bonding. The operation is simple and time-saving, and it is not easy to damage the surface of the battery cell. It can reduce the risks of leakage, leakage of electricity, etc. caused by damage to the battery cell, and can also reduce the space occupied by the mechanical connection component.

[0147] In some embodiments, Figures 2 to 4 As shown, in each battery cell 104 , a side wall erected along the third direction is formed at the end edges of the first shoulder 1047 and the second shoulder 1048 close to each other, and the side wall is used to define a boundary of each of the first shoulder 1047 and the second shoulder 1048 .

[0148] Specific as Figure 3 As shown, since the first shoulder 1047 and the second shoulder 1048 are located on both sides of the top cover 1044, a side wall formed by the end edge of the top cover 1044 and erected along the third direction Z is formed at the boundary between the first shoulder 1047, the second shoulder 1048 and the top cover 1044. The boundary between the first shoulder 1047 and the second shoulder 1048 can be easily determined by the side wall, so that the strip-shaped member can be easily aligned and installed with the first shoulder 1047, the second shoulder 1048, and the third shoulder formed by combining the first shoulder 1047 and the second shoulder 1048. Of course, it is also possible not to provide such a top cover 1044 that forms a clear boundary structure (such as a side wall standing along the third direction) with the first shoulder 1047 and the second shoulder 1048 on the top surface of the battery cell 104, but to use the electrode terminals 1045 on the surface of the battery cell 104, other marks provided on the surface of the battery cell 104, etc. to determine the positions of the first shoulder 1047 and the second shoulder 1048.

[0149] Since the end edges of the first shoulder 1047 and the second shoulder 1048 on the sides close to each other are formed with side walls erected along the third direction, the strip component can be easily aligned with the first shoulder 1047 and the second shoulder 1048 and installed in a suitable position even without additional positioning measures, which can reduce the adverse conditions caused by the misalignment of the strip component.

[0150] In some embodiments, Figure 3 As shown, along the third direction Z, a height h1 of the first shoulder 1047 and the second shoulder 1048 of the battery cell 104 is smaller than a height h2 of the electrode terminal 1045 of the battery cell 104 .

[0151] Figure 3 The height h1 at the second shoulder 1048 and the height h2 at the electrode terminal 1045 are shown. Here, since the battery cell 104 has the same height along the third direction Z at the first shoulder 1047 and the second shoulder 1048, the height at the first shoulder 1047 is omitted. Figure 3 The height h1 and the height h2 shown can be measured using a vernier caliper at a temperature of 25°C.

[0152] The thickness (dimension along the third direction Z) of the strip-shaped member can be designed according to the difference between the height h1 and the height h2. For example, the thickness of the strip-shaped member can be less than or equal to the difference between the height h1 and the height h2, or can be slightly greater than the difference between the height h1 and the height h2. The thickness of the strip-shaped member can be determined according to specific circumstances as long as it can achieve the function of strengthening the mechanical strength and does not cause a significant increase in the height dimension of the battery pack 100A.

[0153] Since the height h1 of the battery cell 104 at the first shoulder 1047 and the second shoulder 1048 is smaller than the height h2 at the electrode terminal 1045, the height space between the first shoulder 1047, the second shoulder 1048 and the top surface of the electrode terminal 1045 can be effectively utilized, and the additional increase in the height of the battery case caused by the strip-shaped components or the additional increase in the amount can be suppressed, which is conducive to miniaturization of the battery volume.

[0154] In some embodiments, Figure 2 , Figure 4 and Figure 5 As shown, the box body of the battery 100 (battery pack 100A) includes a frame 103. In the space surrounded by the frame 103, beams extending in the same direction are provided. Each battery cell row is accommodated in the battery cell accommodating space S surrounded by the frame 103 and the beams.

[0155] exist Figure 2 , Figure 4 and Figure 5 In the space surrounded by the frame 103, beams are provided that all extend along the second direction Y. These beams (specifically the first beam 1031 and the second beam 1032, sometimes also referred to as "cross beams") and the frame 1033 of the frame 103 form a battery cell accommodation space S. Figure 2 , Figure 4 and Figure 5 In the illustrated embodiment, two beams are shown to enclose a battery cell accommodating space S, and all battery cells 104 are arranged in the battery cell accommodating space S and bonded to the heat exchange plate 102 or the bottom plate 101. However, the number of beams is not limited to two, and can be one, or three or more. The battery cell accommodating space S enclosed by the beam and the frame 103 can also be not one, but two or more, and all battery cells 104 are arranged in each battery cell accommodating space S in a region. The battery cells 104 arranged in one battery cell accommodating space S can be connected to form a battery module, and the battery modules located in different battery cell accommodating spaces S constitute the battery pack 100A.

[0156] In addition, according to the volume, weight, etc. of the battery pack 100A, Figure 6 As shown, it is also possible to consider adding beams (such as third beams 1036 and longitudinal beams 1037) in the frame 103 that are parallel to and / or cross the beams (such as first beams 1031 and second beams 1032 as transverse beams) extending in the same direction. Figure 6 As shown, with the first beam 1031 , the second beam 1032 , the third beam 1036 , and the longitudinal beam 1037 , four battery cell accommodating spaces S are divided, and battery cell rows formed by the battery cells 104 can be arranged in these spaces respectively.

[0157] In addition, for example, when a mounting point is provided between two horizontal beams (for example, a position for mounting the battery pack 100A on an electrical device), additional beams (for example, longitudinal beams) that intersect the beams (for example, horizontal beams) extending in the same direction may be provided as needed.

[0158] Since the surface of the battery cell row is connected with a strip-shaped component that can increase the mechanical strength, the beams (such as longitudinal beams) can be appropriately reduced while taking into account the overall mechanical strength of the battery, which helps to improve the volume utilization of the battery cell and reduce the overall weight and cost of the battery.

[0159] In some embodiments, the beam includes a first beam 1031 and a second beam 1032 , the first beam 1031 and the second beam 1032 are arranged in parallel, and the strip-shaped member includes a first strip-shaped member, and both ends of the first strip-shaped member are respectively connected to the first beam 1031 and the second beam 1032 .

[0160] In addition to the first beam 1031 and the second beam 1032, the beam may also include a third beam 1036 parallel to the first beam 1031 and the second beam 1032. In this case, both ends of the first strip-shaped member may be connected to any two of the first beam 1031, the second beam 1032 and the third beam 1036 as needed.

[0161] like Figure 2 , Figure 4 As shown, the battery pack 100A includes a plurality of strip-shaped components, which can be of the same type. Figure 2 , Figure 4 In the example shown, the pressure strip 107 is used as the first strip-shaped member. The pressure strip 107 is used as an example for description. The two ends of the pressure strip 107 are respectively connected to the first beam 1031 and the second beam 1032. As a connection method with the beam, it can be connected by bolts or rivet nuts.

[0162] The battery pack 100A may include one or more beading strips 107. From the perspective of improving the mechanical strength of the battery as a whole to withstand vibration, impact, expansion, etc., beading strips 107 may be provided for all third shoulders between adjacent rows of battery cells; from the perspective of appropriately suppressing the overall weight of the battery, beading strips 107 may be provided for some of the third shoulders instead of all of the third shoulders.

[0163] Since the two ends of the pressure strip 107 are respectively connected to the two parallel first beams 1031 and second beams 1032 in the frame 103 , the battery's ability to withstand vibration, impact, expansion, etc. can be improved, especially the expansion force of the battery cell 104 in the extension direction of the pressure strip 107 .

[0164] In some embodiments, Figure 2 , Figure 4 , Figure 7 and Figure 8 As shown, the bead 107 includes a bead body 1071 and a bead connection portion 1072 provided at at least one end of the bead body 1071. The bead connection portion 1072 includes a lap portion 1072a and a connection head 1072b, and the bead connection portion 1072 is connected to one end of the bead body 1071 at the lap portion 1072a and is connected to the first beam 1031 and / or the second beam 1032 at the connection head 1072b.

[0165] Combination Figure 7 and Figure 8 The detailed structure of the pressure strip 107 is further described.

[0166] As a specific example, the layering strip body 1071 is configured to be long and strip-shaped along the first direction X, and has substantially the same width (dimension along the second direction Y) over the entire length. Here, the cross-sectional shape of the layering strip body 1071 can be a triangle, a quadrilateral such as a rectangle or a square, or a polygon, and can be designed according to specific circumstances. However, from the perspective of increasing the contact area with the first shoulder 1047 and the second shoulder 1048, facilitating the transmission of stress and reducing stress concentration, a flat rectangular cross-sectional shape can be adopted.

[0167] A bead connection part 1072 is provided at at least one end of the bead main body 1071. In the case where the bead connection part 1072 is provided at only one end, the end of the bead main body 1071 that is not provided with the bead connection part 1072 can be directly connected to the first beam 1031 or the second beam 1032. In the case where the bead connection parts 1072 are provided at both ends, the two bead connection parts 1072 are respectively connected to the first beam 1031 and the second beam 1032. In the case where the bead 107 is connected to the first beam 1031 and the second beam 1032, the bead main body 1071 in the bead 107 is in surface contact with the surface of the third shoulder (i.e., the first shoulder 1047 and the second shoulder 1048) and is adhesively fixed to the surface of the third shoulder.

[0168] The pressure strip connecting portion 1072 includes a lap portion 1072a and a connecting head portion 1072b. The lap portion 1072a is connected to the pressure strip main body 1071 as a whole in a state where the lap portion 1072a overlaps with the end of the pressure strip main body 1071 within a certain length range and the surface is in contact with the end of the pressure strip main body 1071. As an example of a connection method, Figure 8 As shown in the welding portion 1072d in FIG. 1 , the connection is performed by welding at multiple positions (e.g., multiple positions that are substantially evenly distributed) in the overlapping area. Such a connection method helps to firmly connect the layer strip connection portion 1072 to the layer strip main body portion 1071, and helps to evenly transfer the stress generated when the layer strip 107 is subjected to the expansion force to the first beam 1031 and the second beam 1032 along the length direction of the layer strip 107.

[0169] In addition, the connecting head 1072b is formed integrally with the lap portion 1072a, but the width of the connecting head 1072b (the dimension along the second direction Y) is larger than the width of the lap portion 1072a (the dimension along the second direction Y), thereby being firmly connected to the first beam 1031 and the second beam 1032, and not prone to unfavorable conditions such as breakage and tearing. Moreover, the connecting head 1072b is provided with, for example, two long holes 1072c. The long holes 1072c are fixedly connected to the first beam 1031 and the second beam 1032 by bolts or rivet nuts. By providing the long holes 1072c, the dimensional deviation between the spacing between the first beam 1031 and the second beam 1032 (for example, the distance along the first direction X) and the length of the pressure strip 107 can be allowed, and a small deformation along the length direction (the distance along the first direction X) of the pressure strip 107 can also be allowed, thereby reducing the situation of breakage, tearing, etc. caused by excessive stretching of the pressure strip 107.

[0170] Since the first strip-shaped member such as the pressure strip 107 is connected to the first beam 1031 and the second beam 1032 via the connecting head 1072b, the connection strength can be improved and the risk of tearing of the first strip-shaped member due to stress concentration can be reduced.

[0171] In addition, in some embodiments, the first strip-shaped member includes a strip-shaped member made of a steel strip. Of course, the first strip-shaped member can also be formed of other suitable materials.

[0172] Since the strip-shaped components made of steel strips have high impact strength, tensile strength and other strengths, they help to improve the mechanical strength of the battery to withstand vibration shock, expansion, etc.

[0173] In some embodiments, the surface of the first strip-shaped member has an insulating film or an insulating coating.

[0174] Since the first strip-shaped member has an insulating film or an insulating coating on its surface, it can be insulated from the first shoulder portion, the second shoulder portion, etc. of the battery cell.

[0175] In some embodiments, Figure 2 and Figure 4 As shown, the strip-shaped member further includes a second strip-shaped member different from the first strip-shaped member, and the first strip-shaped member and the second strip-shaped member extend along the same direction.

[0176] exist Figure 2 , Figure 4 In the example shown, the brace 108 is used as the second strip-shaped member. Fig. 9 and Fig.10 The detailed structure of the pull rod 108 is further described.

[0177] As a specific example, the pull rod 108 is configured as a long strip, and its cross-sectional shape can be a triangle, a rectangle, a square or other quadrilateral, a polygon or other shapes, which can be designed according to specific circumstances. Fig. 9 In the example shown, the brace 108 is configured such that the brace end surface 1081 is shaped with a convex portion in the middle, which is beneficial for improving the ability to withstand tensile forces along the length direction or improving the tensile strength. Fig.10 The overall shape shown is "concave".

[0178] The battery pack 100A may include one or more tie bars 108. The tie bars 108 are, for example, bonded to the surfaces of the first shoulder 1047, the second shoulder 1048, or both of the first shoulder 1047 and the second shoulder 1048 in the third shoulder. The pressure strips 107 and the tie bars 108 may be alternately arranged in the plurality of third shoulders, and the alternate arrangement here includes the case where one pressure strip 107 and one tie bar 108 are repeatedly arranged as a unit, and also includes the case where several pressure strips 107 and several tie bars 108 are repeatedly arranged as a unit.

[0179] In addition, of course, a third strip-shaped member different from the first strip-shaped member and the second strip-shaped member may also be included.

[0180] Since the second strip-shaped member is also connected to the surface of the battery cell row, it also has the function of improving the rigidity of the battery cell row and improving the vibration and impact strength of the battery. In addition, since the strip-shaped member can include the first strip-shaped member and the second strip-shaped member, the two strip-shaped members can be arranged in different forms and flexibly combined to meet the mechanical strength requirements, the overall weight requirements of the battery, the cost requirements, etc., which is conducive to taking into account the above three requirements in a simple way.

[0181] In some embodiments, the first strip-shaped member and the second strip-shaped member are made of different materials and / or have different sizes.

[0182] By setting the first strip member (such as the layer 107) and the second strip member (such as the pull bar 108) to be made of different materials, the advantages of the two materials can be comprehensively utilized. For example, the first strip member (such as the layer 107) can be made of a material that has a high tolerance for both tensile force and shear force, and the second strip member can be made of a material that has a high tolerance for tensile force but has other advantages such as light weight and / or low cost.

[0183] In some embodiments, the second strip-shaped member comprises a strip-shaped member made of a fiber-reinforced resin composite material.

[0184] As the fiber-reinforced resin composite material, a commercially available product can be used, and for example, a fiber-reinforced resin composite material in which the fibers are carbon fibers, glass fibers, or the like can be used.

[0185] Since the second strip-shaped member (stretching strip 108) made of fiber-reinforced resin composite material has good tensile strength, it helps to improve the ability of the battery box and even the entire battery to withstand the battery expansion force. Figure 2 and Figure 4 As shown, the two ends of the tie rod 108 are close to the first beam 1031 and the second beam 1032 respectively with a gap therebetween, which is conducive to the tie rod 108 exerting its tensile strength.

[0186] Since the strip-shaped components made of fiber-reinforced resin composite materials have the advantage of being light in weight, they help reduce the overall weight of the battery while taking into account the overall mechanical strength of the battery. In addition, since the strip-shaped components made of fiber-reinforced resin composite materials have good tensile strength, they help improve the mechanical strength of the battery to withstand expansion forces.

[0187] As a specific example, when the first strip member (pressing strip 107) is made of steel strip, for example, and the second strip member (pull strip 108) is made of fiber-reinforced resin composite material, the ability of the two strip members to withstand vibration impact and expansion force can be comprehensively utilized, and the light weight of the member made of composite material can also be utilized, thereby helping to reduce the weight of the battery as a whole. Of course, the materials of the first strip member and the second strip member can also be other combinations.

[0188] In addition, the first strip member (such as the pressure strip 107) and the second strip member (such as the pull strip 108) may be made of the same material but different in size. The size here includes at least one of the length size (such as the size along the first direction X), the width size (such as the size along the second direction Y) and the thickness size (such as the size along the third direction Z). Figure 2 and Figure 4 In the specific example shown, the pressure strip 107 and the pull strip 108 have different length dimensions and width dimensions.

[0189] Of course, this is just a specific example, and the settings of the size, material, etc. of the first strip member and the second strip member are not limited to this specific example and can be set according to specific circumstances.

[0190] Therefore, by setting the first strip member and the second strip member to have different materials and / or different lengths, the overall weight of the strip member can be reduced while taking into account the mechanical strength, thereby reducing the overall weight of the battery and helping to reduce the cost of the strip member.

[0191] In some embodiments, Figure 2 and Figure 4 As shown, the first strip-shaped members and the second strip-shaped members are alternately arranged in the third direction Z, or the first strip-shaped members and the second strip-shaped members are symmetrically arranged about the symmetry axis along the first direction X.

[0192] exist Figure 2 and Figure 4 In the example shown, three groups are provided along the second direction Y, with each two rows of battery cells forming a group. The third shoulders (first shoulders 1047 and second shoulders 1048) between adjacent groups are provided with a pressure strip 107 as a first strip-shaped member; the third shoulders (first shoulders 1047 and second shoulders 1048) between two rows of battery cells in each group are provided with a pull strip 108 as a second strip-shaped member. Such a configuration helps to improve the mechanical strength of the battery as a whole and can suppress the weight.

[0193] certainly, Figure 2 and Figure 4The configuration shown is only a specific example, and the first strip-shaped member and the second strip-shaped member may also be arranged in other configurations.

[0194] By alternately arranging the first strip member and the second strip member along the second direction Y (the direction in which the battery cells are stacked in sequence), it is helpful to strengthen the overall mechanical strength of the battery. By arranging the first strip member and the second strip member symmetrically along the first direction X (the direction in which the battery cells are arranged into battery cell rows), it is helpful to evenly strengthen the overall mechanical strength of the battery.

[0195] Some specific examples of the present application are described below.

[0196] like Figure 2 and Figure 4 As shown, the overall structure of the battery pack 100A mainly includes a bottom plate 101, a water-cooled plate as a heat exchange plate 102, a box (frame 103), a battery pack, a connecting pipe 105 for water cooling, an electrical connection copper-aluminum bar as a converging component 106, a pressure bar 107 as a first strip-shaped component, a pull bar 108 as a second strip-shaped component, a BMS component 109, a high-voltage box component 110, an electrical plug-in part 111 and a cover body 112 as an upper cover component. The battery pack is composed of a plurality of battery cells 104 connected in series.

[0197] like Figure 2 , Figure 4 and Figure 5 As shown, the box (frame 103) is mainly composed of a frame 1033 as an outer frame, a first beam 1031 and a second beam 1032 as inner beams. There is no longitudinal beam connecting the two inner beams, and the internal space (battery cell accommodating space S) is used to place batteries to maximize space utilization. The water cooling plate is placed at the bottom of the box and fixed to the frame and inner beam of the box by welding or bolts.

[0198] like Figure 3 As shown, the battery cell 104 has a battery cell large surface 1041 , a battery cell side surface 1042 , a battery cell bottom surface 1043 , and battery cell shoulders (a first shoulder 1047 and a second shoulder 1048 ).

[0199] Combination Figures 1 to 4 It can be seen that the battery pack 100A is tightly connected into a battery group through the large surface 1041 of the battery cell and the side surface 1042 of the battery cell, and then placed in the box (frame 103). The bottom surface 1043 of the battery cell is bonded and fixed to the water cooling plate through a thermal conductive structural adhesive, and heat is transferred to achieve cooling of the bottom surface of the battery cell.

[0200] like Figure 4As shown, a pressure strip 107 and a pull bar 108 are placed above the battery pack. The bottom of the pressure strip 107 and the pull bar 108 are bonded to the shoulders of the battery cell (the first shoulder 1047 and the second shoulder 1048) by structural adhesive, so as to play the role of fixing the battery cell 104, which can improve the rigidity of the battery pack and improve the vibration and impact strength of the battery pack. The two ends of the pressure strip 107 are connected to the first beam 1031 and the second beam 1032 as the cross beams in the box body by bolts or rivet nuts, so as to withstand the expansion force of the battery cell. The pressure strip 107 is made of high-strength steel strip material, and the surface is insulated from the shoulders of the battery cell by hot-pressed insulating film or insulating spray coating. The pull bar 108 is made of high-strength composite material. Considering the force, comprehensive cost and weight of the box body, the pressure strip 107 is preferably placed at 1 / 3 and 2 / 3 of the length of the first beam 1031 and the second beam 1032 as the cross beams in the box body, and the pressure strip 108 is placed at other positions. According to the different strength requirements of each battery pack, the positions and quantities of the pressure strips 107 and the pull strips 108 can be adjusted so that the battery pack can achieve the lowest weight and cost while meeting the strength requirements.

[0201] In addition, if Figure 6 As shown, when the battery pack is large in size or heavy and there is a concern that the pressure strip 107 and the pull strip 108 are insufficient to meet the strength requirements of the battery pack, or when there is a requirement for a mounting point between the two inner beams, further cross beams or longitudinal beams can be added between the inner beams of the box (the first beam 1031 and the second beam 1032).

[0202] A second aspect of the present application provides an electrical device, which includes the battery provided by the first aspect of the present application for providing electrical energy.

[0203] Since the overall volume utilization of the battery can be improved while taking into account the overall structural strength of the battery, for the electrical device, it helps to reduce the space used for arranging the battery and reduce the overall weight of the electrical device, or it can increase the total energy of the battery used in the electrical device to extend the charging interval of the electrical device.

[0204] The above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them; although the present application is 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: Box; A battery cell row, comprising a plurality of battery cells arranged along a first direction, wherein a plurality of the battery cell rows are stacked along a second direction to form a battery cell array and placed in the box; and The heat management component is disposed on one side of the plurality of battery cells along a third direction for heat exchange with the battery cells, wherein the first direction is perpendicular to the second direction and the third direction.

2. The battery according to claim 1, characterized in that At least one strip-shaped member is provided on a surface of the battery cell row that is away from the heat management component along the third direction. The strip-shaped member extends along the first direction and is connected to at least one of the battery cells in the battery cell row.

3. The battery according to claim 2, characterized in that The battery cell includes a first shoulder and a second shoulder, wherein the first shoulder and the second shoulder are respectively located on a surface of the battery cell having an electrode terminal side and on both sides of the electrode terminal, and the strip-shaped member is connected to the battery cell at the first shoulder and / or the second shoulder of the battery cell.

4. The battery according to claim 3, characterized in that In each of the battery cell rows, each of the first shoulders is connected in sequence, and each of the second shoulders is connected in sequence, The battery includes: the strip-shaped member connected to the first shoulder of each of the battery cells in the battery cell row, and / or the strip-shaped member connected to the second shoulder of each of the battery cells in the battery cell row.

5. The battery according to claim 4, characterized in that The plurality of battery cell rows include a first battery cell row and a second battery cell row adjacent to each other along the second direction, the first battery cell row and the second battery cell row being close to or in contact with each other along the second direction, The first battery cell row and the second battery cell row jointly form a third shoulder, and the third shoulder includes the first shoulders of the first battery cell row that are connected in sequence and the second shoulders of the second battery cell row that are adjacent to the first battery cell row that are connected in sequence. The strip-shaped member is connected to both the first shoulder and the second shoulder of the third shoulder.

6. The battery according to any one of claims 3 to 5, characterized in that The connecting comprises bonding.

7. The battery according to any one of claims 3 to 5, characterized in that In each of the battery cells, a side wall erected along the third direction is formed at the end edges of the first shoulder portion and the second shoulder portion on the sides close to each other, and the side wall is used to define a boundary of each of the first shoulder portion and the second shoulder portion.

8. The battery according to claim 6, characterized in that In each of the battery cells, a side wall erected along the third direction is formed at the end edges of the first shoulder portion and the second shoulder portion on the sides close to each other, and the side wall is used to define a boundary of each of the first shoulder portion and the second shoulder portion.

9. The battery according to any one of claims 3 to 5, characterized in that Along the third direction, heights of the battery cell at the first shoulder and the second shoulder are smaller than a height of the electrode terminal of the battery cell.

10. The battery according to claim 6, characterized in that Along the third direction, heights of the battery cell at the first shoulder and the second shoulder are smaller than a height of the electrode terminal of the battery cell.

11. The battery according to claim 8, characterized in that Along the third direction, heights of the battery cell at the first shoulder and the second shoulder are smaller than a height of the electrode terminal of the battery cell.

12. The battery according to any one of claims 2 to 5, characterized in that The box body comprises a frame, A beam extending in the same direction is provided in the space surrounded by the frame, and each of the battery cell rows is accommodated in the battery cell accommodating space surrounded by the frame and the beam.

13. The battery according to claim 12, characterized in that The beam comprises a first beam and a second beam, wherein the first beam is arranged parallel to the second beam, The strip-shaped member comprises a first strip-shaped member, Two ends of the first strip-shaped member are respectively connected to the first beam and the second beam.

14. The battery according to claim 13, characterized in that The first strip-shaped component includes a beading main body and a beading connection portion provided at at least one end of the beading main body, the beading connection portion includes a lap portion and a connection head portion, the beading connection portion is connected to one end of the beading main body at the lap portion and is connected to the first beam and / or the second beam at the connection head portion.

15. The battery according to claim 13 or 14, characterized in that: The strip-shaped member further comprises a second strip-shaped member different from the first strip-shaped member, The first strip-shaped member and the second strip-shaped member extend in the same direction.

16. The battery according to claim 15, characterized in that The first strip-shaped component and the second strip-shaped component are made of different materials and / or have different sizes.

17. The battery according to claim 15, characterized in that The first strip-shaped members and the second strip-shaped members are alternately arranged in the second direction, or the first strip-shaped members and the second strip-shaped members are symmetrically arranged about a symmetry axis along the first direction.

18. The battery according to claim 16, characterized in that The first strip-shaped members and the second strip-shaped members are alternately arranged in the second direction, or the first strip-shaped members and the second strip-shaped members are symmetrically arranged about a symmetry axis along the first direction.

19. The battery according to claim 13, characterized in that The first strip-shaped member comprises a strip-shaped member made of a steel strip.

20. The battery according to claim 19, characterized in that The surface of the first strip-shaped member has an insulating film or an insulating coating.

21. The battery according to claim 15, characterized in that The second strip-shaped member comprises a strip-shaped member made of a fiber-reinforced resin composite material.

22. The battery according to claim 21, characterized in that The first strip-shaped member comprises a strip-shaped member made of a steel strip.

23. An electrical device, characterized in that: The electrical device comprises the battery according to any one of claims 1 to 22 for providing electrical energy.

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