Batteries and electrical equipment

Abstract

The present application discloses a battery and an electrical device, wherein the battery comprises a box and at least two layers of battery cells, wherein the at least two layers of battery cells are arranged in the box along the direction of gravity. Thus, under the premise that the internal dimensions of the box are certain, it is ensured that the space of the box in the direction of gravity can be fully utilized, and the dimensions of each layer of battery cells in the direction of gravity will not be too large, so that the electrolyte can fully infiltrate the electrode assembly, which is beneficial to reducing the risk of lithium plating and improving the reliability of the battery cells in the later use process.

Description

Technical Field

[0001] The present application relates to the field of batteries, and more specifically, to a battery and an electrical device. Background Art

[0002] Lithium-ion batteries have outstanding advantages such as high energy density, low environmental pollution, high power density, long service life, wide adaptability, and small self-discharge coefficient. They are one of the most widely used batteries in the world today and an important part of the development of new energy.

[0003] In the development of battery technology, in addition to improving battery performance, the reliability of batteries during use is also an issue that needs to be considered.

[0004] Therefore, how to improve the reliability of batteries during use is an urgent problem to be solved in battery technology. Utility Model Content

[0005] In view of the above problems, the embodiments of the present application provide a battery and an electrical device, which can improve the reliability of battery use.

[0006] In a first aspect, an embodiment of the present application provides a battery, comprising a housing and at least two layers of battery cells, wherein the at least two layers of battery cells are arranged in the housing along a gravity direction.

[0007] At least two layers of battery cells in the technical solution of the embodiment of the present application are arranged in the direction of gravity in the box. Therefore, under the premise that the size of the box in the direction of gravity is certain, it ensures that the space of the box in the direction of gravity can be fully utilized, and the size of each layer of battery cells in the direction of gravity will not be large, so that the electrolyte can fully infiltrate the electrode assembly, reducing the risk of lithium plating and improving the reliability of the battery cells during later use.

[0008] In some embodiments, the battery further includes a separator. The separator is disposed in the box body to separate the internal space of the box body into a first chamber and a second chamber arranged along the gravity direction. The at least two layers of battery cells include a first layer of battery cells and a second layer of battery cells, the first layer of battery cells being located in the first chamber, and the second layer of battery cells being located in the second chamber. By arranging the separator in the box body, the interior of the box body is divided into a first chamber for installing the first layer of battery cells and a second chamber for installing the second layer of battery cells.

[0009] In some embodiments, the separator is a thermal management component, which is used to adjust the temperature of the battery cells. Such a design allows the thermal management component to be connected to both the first layer of battery cells and the second layer of battery cells, so that the thermal management component can simultaneously adjust the temperature of the first layer of battery cells and the second layer of battery cells.

[0010] In some embodiments, the battery cell includes an electrode terminal, and the electrode terminal is disposed at one end of the battery cell in a first direction. The first direction is perpendicular to the direction of gravity. Such a design ensures that the electrode terminal does not increase the size of the battery cell in the direction of gravity.

[0011] In some embodiments, each layer of battery cells includes at least one battery cell group, and each battery cell group includes a plurality of battery cells stacked along the second direction. The surface of the battery cell in the second direction is the surface with the largest area of ​​the battery cell, and the first direction, the second direction and the gravity direction are perpendicular to each other. Each battery cell group is a plurality of battery cells stacked along the second direction. This increases the space utilization of the battery cells inside the box, thereby improving the energy density of the battery.

[0012] In some embodiments, the box includes two first side walls arranged opposite to each other along a first direction. The battery also includes a busbar, which is arranged between the first side wall and the battery cell. The busbar connects the electrode terminals of two adjacent battery cells. Such a design ensures that the busbar does not occupy the space in the gravity direction inside the box, which is conducive to improving the energy density of the battery.

[0013] In some embodiments, the busbar is made of a flexible material. Such a design allows the busbar to deform to adapt to the change in the distance between the electrode terminals of adjacent battery cells in the battery cell group when pressure is applied to the battery cell group to facilitate boxing during production, and when the battery cells expand during use, which is beneficial to improving the stability of the busbar connection.

[0014] In some embodiments, each layer of battery cells includes multiple battery cell groups, and the multiple battery cell groups are arranged along the first direction and / or the second direction. Such a design can increase the utilization rate of the space in the box, thereby improving the energy density of the battery.

[0015] In some embodiments, the battery further includes a partition beam. The partition beam is disposed in the box body and connected to the box body. The partition beam is used to separate two battery cell groups adjacent to each other along the second direction. Such a design is conducive to planning the placement space of the battery cell group, thereby facilitating the operator to insert the battery cell group into the box body during the production process.

[0016] In some embodiments, the box includes two second side walls arranged opposite to each other along the second direction, and the two ends of each battery cell group in the second direction are respectively abutted against the second side wall and the partition beam, and / or the two ends of each battery cell group in the second direction are respectively abutted against two adjacent partition beams. The surface of the battery cell in the second direction is the surface with the largest area of ​​the battery cell, and the abutment of the surface with the largest area of ​​the battery cell with the partition beam and / or the second side wall can enable the partition beam and / or the second side wall to provide support force to the battery cell to limit the expansion of the battery cell.

[0017] In a second aspect, an embodiment of the present application provides an electrical device, which includes the battery in the above embodiment, and the battery is used to provide electrical energy. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without paying creative work.

[0019] Figure 1 A schematic diagram of the structure of a vehicle provided in some embodiments of the present application;

[0020] Figure 2 A schematic diagram of the exploded structure of a battery provided in some embodiments of the present application;

[0021] Figure 3 A schematic diagram of the structure of the first part provided for some embodiments of the present application;

[0022] Figure 4 A schematic diagram of a cross-sectional structure of a battery along a first direction provided in some embodiments of the present application;

[0023] Figure 5 A schematic diagram of the structure of a battery cell provided in some embodiments of the present application;

[0024] Figure 6 A schematic diagram of the structure of a first layer of battery cells provided in some embodiments of the present application;

[0025] Figure 7 A schematic diagram of the structure of a battery provided in some embodiments of the present application;

[0026] Figure 8 A schematic diagram of an exploded structure of another battery provided in some embodiments of the present application;

[0027] Fig. 9 A schematic diagram of the structure of another battery provided for some embodiments of the present application.

[0028] Icon: 1000-Vehicle;

[0029] 100-battery; 200-controller; 300-motor;

[0030] 10-box; 11-first part; 11a-first chamber; 11b-second chamber; 111-first side wall; 112-second side wall; 113-partition beam; 12-second part; 13-partition member;

[0031] 20-battery cell; 20a-electrode terminal; 20b-bus; 20c-flexible member;

[0032] 21 - first layer of battery cells; 22 - second layer of battery cells; 23 - battery cell group. DETAILED DESCRIPTION

[0033] In order to make the purpose, technical solution and advantages of the embodiments of the present application clearer, the technical solution in the embodiments of the present application will be clearly described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0034] Unless otherwise defined, all technical and scientific terms used in this application have the same meanings as those commonly understood by technicians in the technical field of this application; the terms used in the specification of this application 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 drawings and any variations thereof are intended to cover non-exclusive inclusions. The terms "first", "second", etc. in the specification and claims of this application or the above-mentioned drawings are used to distinguish different objects, rather than to describe a specific order or a primary and secondary relationship.

[0035] Reference to "embodiment" in this application means that a particular feature, structure, or characteristic described in conjunction with the embodiment may be included in at least one embodiment of the present application. The appearance of the phrase in various places 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.

[0036] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", and "attached" 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 direct connection, or an indirect connection through an intermediate medium, or it can be the internal communication of two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0037] The term "and / or" in this application is only a description of the association relationship of associated objects, indicating that there can be three relationships. 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 application generally indicates that the associated objects before and after are in an "or" relationship.

[0038] In the embodiments of the present application, the same reference numerals represent the same components, and for the sake of brevity, detailed descriptions of the same components are omitted in different embodiments. It should be understood that the thickness, length, width and other dimensions of various components in the embodiments of the present application shown in the drawings, as well as the overall thickness, length, width and other dimensions of the integrated device are only exemplary descriptions and should not constitute any limitation to the present application.

[0039] The term "plurality" used in the present application refers to two or more (including two).

[0040] 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.

[0041] Battery cells include, but are not limited to, lithium-ion batteries, sodium-ion batteries, sodium-lithium-ion batteries, lithium metal batteries, sodium metal batteries, lithium-sulfur batteries, magnesium-ion batteries, nickel-hydrogen batteries, nickel-cadmium batteries, lead-acid batteries, and the like.

[0042] A battery cell 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 removed between the positive electrode and the negative electrode. The separator is set between the positive electrode and the negative electrode to reduce the risk of short circuit between the positive and negative electrodes, while allowing active ions to pass through.

[0043] In some embodiments, the battery cell further includes an electrolyte, which plays a role in conducting ions between the positive and negative electrodes, wherein the electrolyte includes an electrolyte salt and a solvent.

[0044] In some embodiments, the electrolyte salt may include at least one of lithium hexafluorophosphate, lithium tetrafluoroborate, lithium perchlorate, lithium hexafluoroarsenate, lithium bis(fluorosulfonyl)imide, lithium bis(trifluoromethanesulfonyl)imide, lithium trifluoromethanesulfonate, lithium difluorophosphate, lithium difluorooxalatoborate, lithium dioxalatoborate, lithium difluorodioxalatophosphate, and lithium tetrafluorooxalatophosphate.

[0045] In some embodiments, the solvent may include at least one of ethylene carbonate, propylene carbonate, ethyl methyl carbonate, diethyl carbonate, dimethyl carbonate, dipropyl carbonate, methyl propyl carbonate, ethyl propyl carbonate, butylene carbonate, fluoroethylene carbonate, methyl formate, methyl acetate, ethyl acetate, propyl acetate, methyl propionate, ethyl propionate, propyl propionate, methyl butyrate, ethyl butyrate, 1,4-butyrolactone, cyclopentane, dimethyl sulfone, methyl ethyl sulfone and diethyl sulfone. The solvent may also be an ether solvent. The ether solvent may include one or more of ethylene glycol dimethyl ether, ethylene glycol diethyl ether, diethylene glycol dimethyl ether, triethylene glycol dimethyl ether, tetraethylene glycol dimethyl ether, 1,3-dioxolane, tetrahydrofuran, methyltetrahydrofuran, diphenyl ether and crown ether.

[0046] In some embodiments, the electrode assembly is a wound structure, wherein the positive electrode sheet and the negative electrode sheet are wound into the wound structure.

[0047] In some embodiments, the electrode assembly is a laminate structure.

[0048] In some embodiments, the shape of the electrode assembly can be cylindrical, flat, or polygonal.

[0049] In some embodiments, the electrode assembly is provided with tabs, which can lead current out of the electrode assembly. The tabs include a positive tab and a negative tab.

[0050] 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.

[0051] As an example, the battery cell may 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.

[0052] The battery referred to in the embodiments of the present application refers to a single physical module including a plurality of battery cells to provide higher voltage and capacity.

[0053] In some embodiments, the battery may be a battery pack, which includes a case and battery cells, wherein the battery cells or battery modules are accommodated in the case.

[0054] In some embodiments, the box body can be used as a part of the chassis structure of the vehicle. For example, part of the box body can become at least a part of the floor of the vehicle, or part of the box body can become at least a part of the cross beam and longitudinal beam of the vehicle.

[0055] In some embodiments, the battery may be an energy storage device, which includes an energy storage container, an energy storage cabinet, and the like.

[0056] The development of battery technology must take into account many design factors at the same time, such as energy density, cycle life, discharge capacity, charge and discharge rate and other performance parameters. In addition, the reliability of the battery during use must also be considered.

[0057] When the battery cells are assembled in the box, sometimes the size of the box in the direction of gravity is larger. At this time, in order to increase the space utilization in the box, the size of the battery cells in the direction of gravity will be increased. However, the larger size of the battery cells in the direction of gravity will cause the electrolyte in the battery to not flow well in the direction of gravity, thereby increasing the risk of lithium plating.

[0058] In view of this, an embodiment of the present application provides a battery, which includes a case and at least two layers of battery cells, and the at least two layers of battery cells are arranged in the case along the direction of gravity. Therefore, under the premise that the internal size of the case is certain, it is ensured that the space of the case in the direction of gravity can be fully utilized, and the size of each layer of battery cells in the direction of gravity will not be large, so that the electrolyte can fully infiltrate the electrode assembly, thereby reducing the influence of gravity on the electrolyte, which is beneficial to reducing the risk of lithium plating and improving the reliability of the battery cells during later use.

[0059] The embodiments of the present application provide an electric device using a battery as a power source, 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, such as a game console, an electric car toy, an electric ship toy, and an electric airplane toy, etc., and the spacecraft may include an airplane, a rocket, a space shuttle, and a spacecraft, etc.

[0060] For the convenience of description, the following embodiments are described by taking a vehicle 1000 as an example of an electrical device in an embodiment of the present application.

[0061] Please refer to Figure 1 , Figure 1A schematic diagram of the structure of a vehicle 1000 provided for some embodiments of the present application. The vehicle 1000 may be a fuel vehicle, a gas vehicle or a new energy vehicle, and the new energy vehicle may be a pure electric vehicle, a hybrid vehicle or an extended-range vehicle, etc. A battery 100 is provided inside the vehicle 1000, and the battery 100 may be provided at the bottom, head or tail of the vehicle 1000. The battery 100 may be used to power the vehicle 1000, for example, the battery 100 may be used as an operating power source for the vehicle 1000. The vehicle 1000 may also include a controller 200 and a motor 300, and the controller 200 is used to control the battery 100 to power the motor 300, for example, for starting, navigating and driving the vehicle 1000.

[0062] 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.

[0063] According to some embodiments of the present application, referring to Figure 2 , and further refer to Figure 3 and 4 , Figure 2 Schematic diagram of the exploded structure of a battery 100 provided in some embodiments of the present application, Figure 3 A schematic diagram of the structure of the first part 11 provided in some embodiments of the present application, Figure 4 A schematic diagram of a cross-sectional structure of a battery 100 provided in some embodiments of the present application along a first direction. Some embodiments of the present application provide a battery 100 comprising a housing 10 and at least two layers of battery cells 20, wherein the at least two layers of battery cells 20 are arranged in the housing 10 along the direction of gravity.

[0064] The box body 10 is a housing for providing a stable and sealed working environment for the battery cells 20 .

[0065] Understandable, see Figure 2 The box body 10 may include two parts, which are respectively referred to as the first part 11 and the second part 12, and the first part 11 and the second part 12 are buckled together along the gravity direction. The first part 11 may be a semi-enclosed structure with openings at both ends. In this case, the number of the second parts 12 may be set to two, and the two second parts 12 are respectively set at the two openings of the first part 11, and cooperate with the first part 11 to form a sealed space.

[0066] The sealed space is used to accommodate at least two battery monomer layers (not shown in the figure), and the sealed space may also include a structure for fixing the battery monomer 20.

[0067] Optionally, the first part 11 and the second part 12 can be made of a material with a certain hardness and strength (such as aluminum alloy), so that the box body 10 is not easily deformed when squeezed or collided, so that the battery 100 can have a higher structural strength, which is beneficial to reducing the degree of damage to the battery 100 caused by external force collision.

[0068] The shapes of the first portion 11 and the second portion 12 may be determined according to the shape of the battery cell layer (not shown in the figure).

[0069] Optionally, the dimension h1 of the box 10 in the direction of gravity should satisfy h1>120mm. If the value of h1 is too small, the battery cells 20 in the box 10 are also smaller in the direction of gravity due to the limitation of the box 10, so that the electrolyte can fully infiltrate the electrode assembly. Therefore, there is no need to arrange the battery cells 20 in the direction of gravity. Exemplary h1 can be 130mm, 140mm, 150mm, etc. The embodiments of the present application are not limited to this.

[0070] Optionally, the size h2 of the battery cell 20 in the middle direction should satisfy h2<200mm. If the value of h2 is too large, the electrolyte will not be able to fully infiltrate the electrode assembly. Exemplary h1 can be 190mm, 170mm, 150mm, etc. The embodiments of the present application are not limited to this.

[0071] Taking the box body 10 as a rectangular parallelepiped as an example, the length direction of the box body 10 is the first direction, the width direction of the box body 10 is the second direction, and the thickness direction of the box body 10 is parallel to the gravity direction.

[0072] The gravity direction refers to the direction in which the gravity borne by the box body 10 points after the box body 10 is installed on the electrical equipment.

[0073] At least two layers of battery cells 20 are arranged in the box body 10 along the direction of gravity. Therefore, under the premise that the size of the box body 10 in the direction of gravity is certain, it ensures that the space of the box body 10 in the direction of gravity can be fully utilized, and the size of each layer of battery cells 20 in the direction of gravity will not be too large, so that the electrolyte can fully infiltrate the electrode assembly, which is beneficial to reducing the risk of lithium plating and improving the reliability of the battery cells 20 during later use.

[0074] According to some embodiments of the present application, optionally, referring to Figure 3 , and please refer to Figure 4The battery 100 further includes a separator 13. The separator 13 is disposed in the box body 10 to separate the internal space of the box body 10 into a first chamber 11a and a second chamber 11b arranged along the gravity direction. The at least two layers of battery cells 20 include a first layer of battery cells 21 and a second layer of battery cells 22, wherein the first layer of battery cells 21 is located in the first chamber 11a, and the second layer of battery cells 22 is located in the second chamber 11b.

[0075] The box body 10 has a sealed space inside, and the partition 13 refers to a component that can separate the sealed space into a first chamber 11a and a second chamber 11b. For example, the partition 13 can be a plate-shaped structure, and the edges of the partition 13 are connected to the inner surface of the first part 11. The plate-shaped partition 13 divides the sealed space into the first chamber 11a and the second chamber 11b located on both sides of the partition 13 along the gravity direction.

[0076] Optionally, the partition 13 can be connected to the first part 11 by bolts; or, the partition 13 can be fixed by being integrally formed with the first part 11; or, the partition 13 can be connected to the first part 11 by welding, which is not limited to the embodiments of the present application.

[0077] It can be understood that there may be n partitions 13 (n>1), and the n partitions 13 are sequentially arranged in the first part 11 at intervals along the gravity direction to divide the sealed space into n+1 chambers.

[0078] Optionally, the partition 13 and the first part 11 may be sealed to make the first chamber 11a and the second chamber 11b more independent. The partition 13 and the first part 11 may be sealed by a sealant, a sealing gasket or the like.

[0079] The first chamber 11 a and the second chamber 11 b are used to accommodate the first layer of battery cells 21 and the second layer of battery cells 22 , respectively, so as to provide relatively independent working environments for the first layer of battery cells 21 and the second layer of battery cells 22 , respectively.

[0080] According to some embodiments of the present application, optionally, the separator 13 is a thermal management component, and the thermal management component is used to adjust the temperature of the battery cell 20 .

[0081] The thermal management component is used to adjust the temperature of the battery cell 20. The thermal management component can contain a fluid or a solid-liquid phase change material to adjust the temperature of multiple battery cells 20. Specifically, the fluid can be a liquid or a gas. The original state of the solid-liquid phase change material is solid, and it can become liquid after absorbing heat.

[0082] Adjusting the temperature refers to heating or cooling the first layer of battery cells 21 and the second layer of battery cells 22. In the case of cooling or lowering the temperature of the first layer of battery cells 21 and the second layer of battery cells 22, the thermal management component is used to contain a cooling fluid or a solid-liquid phase change material to lower the temperature of the multiple battery cells 20. At this time, the thermal management component can also be called a cooling component, a cooling system or a cooling plate, etc., and the fluid contained therein can also be called a cooling medium or a cooling fluid, more specifically, a coolant or a cooling gas. In addition, the thermal management component can also be used for heating to increase the temperature of the first layer of battery cells 21 and the second layer of batteries 100, which is not limited in the embodiments of the present application. Optionally, the fluid can be circulating to achieve a better temperature regulation effect. Optionally, the fluid can be water, a mixture of water and ethylene glycol, or air, etc.

[0083] Optionally, the hollow portion of the thermal management component may be directly manufactured using a profile, or may be manufactured using a plate material through a stamping process.

[0084] It can be understood that the side of the first layer of battery cells 21 facing the separator 13 should be connected to the separator 13, and the side of the second layer of battery cells 22 facing the separator 13 should be connected to the separator 13. The above connection can be abutting against the separator 13; or, it can also be fixedly connected to the separator 13 by an adhesive, which is not limited in this embodiment.

[0085] The separator 13 can thereby regulate the temperature of the first layer of battery cells 21 and the second layer of batteries 100 .

[0086] According to some embodiments of the present application, optionally, referring to Figure 5 , Figure 5 The schematic diagram of the structure of the battery cell 20 provided in some embodiments of the present application is as follows. The battery cell 20 includes an electrode terminal 20a, and the electrode terminal 20a is disposed at one end of the battery cell 20 in a first direction.

[0087] The electrode terminal 20a refers to a component in the battery cell 20 that is electrically connected to the electrode assembly to output the electrical energy of the battery cell 20. The electrode terminal 20a may include a positive electrode terminal 20a and a negative electrode terminal 20a, wherein the positive electrode terminal 20a is electrically connected to the tab of the positive electrode and the negative electrode terminal 20a is electrically connected to the tab of the negative electrode.

[0088] It can be understood that the positive electrode terminal 20a and the positive electrode tab can be directly or indirectly connected, and the negative electrode terminal 20a and the negative electrode tab can be directly or indirectly connected, and the embodiments of the present application are not limited thereto.

[0089] Optionally, the surface where the electrode terminal 20 a is located may be the surface with the smallest area of ​​the battery cell 20 , so that the space occupied by the electrode terminal 20 a is minimized, which is beneficial to improving the energy density of the battery 100 .

[0090] Disposing the electrode terminal 20 a on a surface parallel to the direction of gravity can allow the click terminal to be located on a smaller surface, which is beneficial to improving the energy density of the battery 100 .

[0091] According to some embodiments of the present application, optionally, referring to Figure 6 , Figure 6 Schematic diagram of the structure of the first layer of battery cells 21 provided in some embodiments of the present application. Each layer of battery cells 20 includes at least one battery cell group 23, and each battery cell group 23 includes a plurality of battery cells 20 stacked along the second direction. The surface of the battery cell 20 in the second direction is the surface of the battery cell 20 with the largest area.

[0092] Optionally, the battery cells 20 adjacent to each other along the second direction may be connected to each other via an adhesive, or the battery cells 20 adjacent to each other along the second direction may be directly abutted against each other.

[0093] In this way, the plurality of battery cells 20 in the battery group 100 are arranged along the second direction, which facilitates the assembly of the battery cell group 23 and can also improve the space utilization of the plurality of battery cells 20 inside the battery 100 .

[0094] According to some embodiments of the present application, optionally, continue to refer to Figure 6 , and further refer to Figure 7 , Figure 7 Schematic diagram of the structure of the battery 100 provided in some embodiments of the present application. The box body 10 includes two first side walls 111 arranged opposite to each other along a first direction. The battery 100 also includes a busbar 20b, which is arranged between the first side wall 111 and the battery cell 20. The busbar 20b connects the electrode terminals 20a of two adjacent battery cells 20.

[0095] The first side wall 111 is a side wall of the box body 10 that is perpendicular to the first direction. The first side wall 111 is used to enclose with other parts of the box body 10 to form the above-mentioned sealed space.

[0096] Optionally, the first side wall 111 may be located on the first portion 11 .

[0097] The busbar 20 b is a component disposed between the plurality of battery cells 20 to achieve series connection, parallel connection, or mixed connection of the plurality of battery cells 20 .

[0098] Optionally, the busbar 20b may be connected to the electrode terminal 20a by welding; or, the busbar 20b may be connected and fixed to the electrode terminal 20a by integral molding, which is not limited in the embodiments of the present application.

[0099] In this way, the busbar 20b will not occupy the space in the gravity direction inside the box 10, which is beneficial to improving the energy density of the battery 100. At the same time, the busbar 20b is arranged between the battery cell 20 and the first side wall 111, which can better utilize the gap between the first part 11 and the battery cell 20 in the first direction, which is beneficial to improving the energy density of the battery 100.

[0100] According to some embodiments of the present application, optionally, the busbar 20b is made of a flexible material.

[0101] The flexible material can be a flexible conductive material such as copper, iron, aluminum, or aluminum alloy.

[0102] Copper, iron, aluminum, and aluminum alloys are existing materials. Aluminum can be a metal material made of aluminum alone, and aluminum alloys can be alloy materials composed of aluminum as the main material. Iron is a general term for iron-carbon alloys with a certain carbon content, and copper can be a metal material made of copper alone.

[0103] In this way, during the production process, pressure is applied to the battery cell group 23 to reduce the volume of the battery cell group 23 for ease of boxing; and when the battery cell 20 expands during use, the busbar 20b can be deformed to adapt to the change in the distance between the electrode terminals 20a of adjacent battery cells 20 in the battery cell group 23, which is beneficial to improving the stability of the connection of the busbar 20b.

[0104] According to some embodiments of the present application, optionally, referring to Figure 8 , Figure 8 The exploded structural diagram of another battery 100 provided in some embodiments of the present application is as follows: Each layer of battery cells 20 includes a plurality of battery cell groups 23, and the plurality of battery cell groups 23 are arranged along the first direction and / or the second direction.

[0105] It can be understood that each layer of battery cells 20 may include multiple battery cell groups 23 arranged along the first direction; or, each layer of battery cells 20 may also include multiple battery cell groups 23 arranged along the second direction; or, each layer of battery cells 20 may include multiple columns of battery cell groups 23 arranged along the first direction, and each column of battery cell groups 23 includes multiple battery cell groups 23 arranged along the second direction.

[0106] In this way, arranging the plurality of battery cell groups 23 along the first direction and / or the second direction facilitates the assembly of the battery 100 and can also improve the space utilization of the plurality of battery cells 20 inside the battery 100 .

[0107] According to some embodiments of the present application, optionally, continue to refer to Figure 8 , and please refer to Fig. 9 , Fig. 9 This is a schematic diagram of the structure of another battery 100 provided in some embodiments of the present application. The battery 100 further includes a partition beam 113. The partition beam 113 is disposed in the box body 10 and connected to the box body 10. The partition beam 113 is used to separate two battery cell groups 23 adjacent to each other along the second direction.

[0108] The partition beam 113 refers to a component that can divide the sealed space in the box body 10 into different spaces along the second direction. The partition beam 113 can be a strip structure, and the two ends of the partition beam 113 in the first direction are respectively connected to the two first side walls 111 of the box body 10 to divide the box body 10 into two spaces located on both sides of the partition beam 113 along the second direction.

[0109] Optionally, the partition 13 can be connected to the first part 11 by bolts; or, the partition 13 can be fixed by being integrally formed with the first part 11; or, the partition 13 can be connected to the first part 11 by welding, which is not limited to the embodiments of the present application.

[0110] It can be understood that the partition beam 113 can be an integral body passing through the partition 13, that is, a through hole corresponding to the partition beam 113 is opened on the partition 13, and the partition beam 113 passes through the through hole, so that the two parts of the partition beam 113 distributed along the gravity direction are respectively located on both sides of the partition 13 along the gravity direction.

[0111] Optionally, a partition beam 113 may be installed in the first portion 11 .

[0112] It can be understood that there may be n (n>1) partition beams 113 , and the n partition beams 113 are sequentially arranged in the first part 11 along the second direction at intervals to divide the sealed space into n+1 spaces.

[0113] This is helpful to plan the placement space of the battery cell group 23, so that it is convenient for the operator to insert the battery cell group 23 into the box body 10 during the production process.

[0114] According to some embodiments of the present application, optionally, continue to refer to Figure 8 , and please refer to Fig. 9 The box body 10 includes two second side walls 112 arranged opposite to each other along the second direction, and both ends of each battery cell group 23 in the second direction are respectively abutted against the second side wall 112 and the partition beam 113, and / or, both ends of each battery cell group 23 in the second direction are respectively abutted against two adjacent partition beams 113.

[0115] The second side wall 112 is a side wall of the box body 10 that is perpendicular to the second direction. The second side wall 112 is used to enclose the first side wall 111 to form the above-mentioned sealed space.

[0116] Optionally, the second side wall 112 may be located on the first portion 11 .

[0117] When the number of the battery cell groups 23 arranged along the second direction is two, both ends of the battery cell group 23 in the second direction abut against the second side wall 112 and the partition beam 113 respectively.

[0118] When the number of battery cell groups 23 arranged along the second direction is two or more, the battery cell groups 23 located at both ends along the second direction respectively abut against the second side wall 112 and the partition beam 113 at both ends in the second direction, and the remaining battery cell groups 100 respectively abut against two adjacent partition beams 113 at both ends in the second direction.

[0119] Optionally, the battery 100 may further include a flexible member 20 c , and a flexible member 20 c is disposed between two adjacent battery cells 20 along the second direction.

[0120] The flexible member 20 c is used to be compressed when pressure is applied to the battery cell group 23 , so as to relieve the pressure on the battery cell 20 .

[0121] Optionally, the flexible member 20c may be made of foam or insulating rubber.

[0122] Optionally, the flexible member 20c may be connected to the battery cell 20 via an adhesive; or, the flexible member 20c may be clamped and fixed by the battery cell 20 adjacent to the flexible member 20c along the second direction, which is not limited in the embodiments of the present application.

[0123] In this way, when the battery cell 20 expands during use, the flexible member 20 c is compressed to reduce the supporting force provided by the partition beam 113 and the second side wall 112 that the battery cell 20 bears.

[0124] Since the surface with the largest area of ​​the battery cell 20 in the battery cell group 23 is located in the second direction, the surface with the largest area of ​​the battery cell 20 abuts against the second side wall 112 or the partition beam 113. Therefore, when pressure is applied to the battery cell group 23 to reduce the volume of the battery cell group 23 and the battery cell group 23 is placed between the second side wall 112 and the partition beam 113, or after the battery cell group 23 is placed between the partition beam 113 and the partition beam 113, the surface with the largest area of ​​the battery cell 20 abuts against the second side wall 112 or the partition beam 113, so that the partition beam 113 and the second side wall 112 can provide support force to the battery cell group 23 to limit excessive expansion of the battery cell group 23.

[0125] Meanwhile, when the battery cells 20 expand during use, the partition beams 113 and the second side walls 112 can provide a supporting force to the battery cell group 23 to limit excessive expansion of the battery cell group 23 .

[0126] According to some embodiments of the present application, referring to Figure 3-Figure 9 The present application provides a battery 100, wherein a separator 13 is installed in a box 10, and the separator 13 is a plate-like structure. The edges of the separator 13 are connected to the inner surface of the first part 11, and the sealed space is divided into a first chamber 11a and a second chamber 11b located on both sides of the separator 13 along the gravity direction. The separator 13 is a thermal management component. The battery 100 includes a first layer of battery cells 21 and a second layer of battery cells 22. The first layer of battery cells 21 is located in the first chamber 11a, and the second layer of battery cells 22 is located in the second chamber 11b. Each layer of battery cells 20 includes two columns of battery cell groups 20 arranged along the first direction, and each column of battery cell groups 23 is two battery cell groups 23 arranged along the second direction. Each battery cell group 23 includes a plurality of battery cells 20 stacked in the second direction. The surface of the battery cell 20 in the second direction is the surface of the battery cell 20 with the largest area. The battery 100 also includes a separator beam 113. The separator beam 113 is arranged in the box 10 and connected to the box 10. The partition beam 113 is used to separate two battery cell groups 23 adjacent to each other in the second direction. The box body 10 includes two second side walls 112 arranged opposite to each other in the second direction, and both ends of each battery cell group 23 in the second direction are respectively abutted against the second side wall 112 and the partition beam 113. The battery cell 20 includes an electrode terminal 20a, and the electrode terminal 20a is arranged at one end of the battery cell 20 in the first direction. The body includes two first side walls 111 arranged opposite to each other in the first direction. The battery 100 also includes a busbar 20b, which is arranged between the first side wall 111 and the battery cell 20. The busbar 20b connects the electrode terminals 20a of two adjacent battery cells 20.

[0127] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application may be combined with each other.

[0128] The above embodiments are only used to illustrate the technical solution of the present application and are not used to limit the present application. For those skilled in the art, the present application may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A battery, characterized in that: include: Box; At least two layers of battery cells, the at least two layers of battery cells are arranged in the box along the direction of gravity; The battery cell comprises an electrode terminal, wherein the electrode terminal is disposed at one end of the battery cell in a first direction, wherein the first direction is perpendicular to the gravity direction; Each layer of battery cells includes at least one battery cell group, and each of the battery cell groups includes a plurality of battery cells stacked along the second direction; Each layer of battery cells includes at least one battery cell group, each of the battery cell groups includes a plurality of battery cells stacked along a second direction, and the first direction, the second direction and the gravity direction are perpendicular to each other; The box body includes two first side walls arranged opposite to each other along the first direction, and the battery further includes: A busbar is disposed between the first side wall and the battery cell, and the busbar connects the electrode terminals of two adjacent battery cells.

2. The battery according to claim 1, characterized in that The battery also includes: A partition, disposed in the box, the partition divides the inner space of the box into a first chamber and a second chamber arranged along the gravity direction; The at least two layers of battery cells include a first layer of battery cells and a second layer of battery cells, the first layer of battery cells being located in the first cavity, and the second layer of battery cells being located in the second cavity.

3. The battery according to claim 2, characterized in that The separator is a heat management component used to adjust the temperature of the battery cell.

4. The battery according to claim 1, characterized in that The surface of the battery cell in the second direction is the surface with the largest area of ​​the battery cell.

5. The battery according to claim 1, characterized in that The current collector is made of flexible material.

6. The battery according to claim 1, characterized in that Each layer of battery cells includes a plurality of the battery cell groups, and the plurality of the battery cell groups are arranged along the first direction and / or the second direction.

7. The battery according to claim 6, characterized in that The battery also includes: A partition beam is disposed in the box body and connected to the box body, and the partition beam is used to separate two battery cell groups adjacent to each other along the second direction.

8. The battery according to claim 7, characterized in that The box body includes two second side walls arranged opposite to each other along the second direction, and both ends of each battery cell group in the second direction are respectively abutted against the second side wall and the partition beam, and / or both ends of each battery cell group in the second direction are respectively abutted against two adjacent partition beams.

9. An electrical device, characterized in that: The invention comprises a battery as claimed in any one of claims 1 to 8, wherein the battery is used to provide electrical energy.

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