Battery and electric device

Abstract

The utility model belongs to the technical field of battery side collision, and particularly relates to a battery and a power utilization device.The battery comprises a box body and battery monomers, and the box body is provided with a containing cavity; the box body is provided with a first side beam extending in the length direction of the box body. The single battery is located in the accommodating cavity and is provided with a first surface with the largest area, and the first surface faces the first side beam; the box body further comprises an internal beam positioned in the accommodating cavity, and the internal beam is positioned between the battery monomer and the first side beam, so that the internal beam, the first side beam and the first surface can jointly bear a side collision acting force; on one hand, the internal beam can bear part of side collision force, so that the performance of the battery under the working conditions of side collision and side extrusion is improved; and on the other hand, the area of the first surface of the single battery is the largest, the side impact force borne by the first surface is larger than that borne by other surfaces, the risk of short circuit after extrusion is low, and the side impact capacity of the battery can be further improved.

Description

Technical Field

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

[0002] Energy conservation and emission reduction are crucial to the sustainable development of the automotive industry. In this context, electric vehicles have become a core part of the sustainable development of the automotive industry due to their energy-saving and environmentally friendly characteristics. However, for electric vehicles, battery technology is a key factor affecting their development.

[0003] The battery includes a box body and battery cells. The battery cells are located in the box body, and the box body protects the battery cells. However, in the case of a side collision of a vehicle, the side beams of the box body are prone to squeeze the battery cells, causing deformation and short circuits, resulting in poor side collision resistance of the battery.

[0004] The above statements are only used to provide background information related to the present application and do not necessarily constitute prior art. Utility Model Content

[0005] The purpose of the embodiments of the present application is to provide a battery and an electrical device, including but not limited to solving the problem in the related art that under the side collision condition of the vehicle, the side beam of the box body is easily squeezed and deformed to cause short circuit, etc., resulting in poor side collision resistance of the battery.

[0006] The technical solution adopted in the embodiment of the present application is:

[0007] In a first aspect, a battery is provided, which includes a box body and a battery cell, wherein the box body has a receiving cavity; the box body has a first side beam extending along the length direction of the box body; the battery cell is located in the receiving cavity, the battery cell has a first surface with the largest area, and the first surface is arranged facing the first side beam; wherein the box body also includes an internal beam located in the receiving cavity, and the internal beam is located between the battery cell and the first side beam.

[0008] In the battery of the embodiment of the present application, the first surface of the battery cell with the largest area is arranged to face the first side beam, and an internal beam is provided between the battery cell and the first side beam, so that the internal beam, the first side beam and the first surface can jointly withstand the side impact force; on the one hand, the internal beam can withstand part of the side impact force, thereby improving the performance of the battery under side impact and side extrusion conditions; on the other hand, the first surface of the battery cell has the largest area, and the first surface can withstand a side impact force greater than other surfaces, and the risk of short circuit after extrusion is also lower, which can also further improve the side impact capability of the battery.

[0009] In some embodiments, the internal beam is configured to abut against the first surface.

[0010] By adopting the technical solution of this embodiment, the internal beam is used to offset the first surface, thereby limiting the expansion of the first surface, which is beneficial to improving the charging and discharging performance of the battery cell. In addition, the internal beam of the box body can also be directly used to bear the side impact force without adding other structures. The structure of the box body is simple and the production cost is lower.

[0011] In some embodiments, the inner beam is spaced apart from the first side beam.

[0012] By adopting the technical solution of this embodiment, a gap is provided between the inner beam and the first side beam, and the gap can provide deformation space and buffer space for the first side beam, which is beneficial to reducing the side impact force on the battery cell and the inner beam, and is beneficial to improving the side impact capability of the battery.

[0013] In some embodiments, there are two internal beams, which are arranged at intervals along the width direction of the box body, and the battery cell is located between the two internal beams; the box body also includes a middle beam, and both ends of the middle beam are connected between the two internal beams.

[0014] By adopting the technical solution of this embodiment, the middle beam can support the two inner beams, the inner beams can withstand greater side impact forces, and the battery has better side impact resistance.

[0015] In some embodiments, the box body further includes a reinforcing beam connected between the first side beam and the inner beam.

[0016] By adopting the technical solution of this embodiment, the reinforcing beam can support the first side beam, the first side beam can withstand a greater side impact force, and the battery has better side impact resistance.

[0017] In some embodiments, reinforcing beams are connected to corresponding positions of the inner beams and the middle beams.

[0018] By adopting the technical solution of this embodiment, a reinforcing beam is connected to the position corresponding to the inner beam and the middle beam, which can better increase the structural strength of the position where the inner beam and the middle beam are connected, and better improve the side impact capability of the battery.

[0019] In some embodiments, there are multiple reinforcing beams, and the multiple reinforcing beams are arranged along the length direction of the box body.

[0020] By adopting the technical solution of this embodiment, the design of multiple reinforcing beams can better increase the structural strength between the first side beam and the internal beam, and the multiple reinforcing beams are arranged along the length direction of the box body, so that the box body has better side impact capability in the length direction, which is beneficial to improving the side impact capability of the battery.

[0021] In some embodiments, there are multiple battery cells, and the multiple battery cells are divided into multiple battery groups. The multiple battery groups are arranged at intervals along the length direction of the box body, and an intermediate beam is provided between two adjacent battery groups.

[0022] By adopting the technical solution of this embodiment, multiple battery cells are arranged in groups, which facilitates the assembly of the battery cells and the box body; in addition, an intermediate beam is provided between two adjacent battery groups, which can fully utilize the space on both sides of the intermediate beam, which is beneficial to improving the energy density of the battery.

[0023] In some embodiments, each battery pack includes two columns of battery cells, which are arranged along the length direction of the box; in two adjacent columns of battery cells, surfaces of the two battery cells arranged along the length direction of the box that are away from each other are provided with electrode terminals for inputting or outputting electrical energy.

[0024] By adopting the technical solution of this embodiment, the electrode terminals of the two battery cells arranged along the length direction of the box body are relatively separated from each other, which is beneficial to reduce the mutual influence between the electrode terminals of the two battery cells and improve the reliability of battery use; in addition, it is also convenient to connect the surface of the battery cell in the height direction with the heat exchange plate, the upper cover and the bottom plate, so as to improve the heat exchange efficiency and modal performance of the battery.

[0025] In some embodiments, the box body further includes a mounting beam for mounting, and the mounting beam is connected to a side of the first side beam facing away from the battery cell.

[0026] By adopting the technical solution of this embodiment, the mounting beam can also bear a part of the side impact force, which is also beneficial to improving the side impact capability of the battery.

[0027] In some embodiments, the battery cell has a second surface and a third surface that are relatively distributed in the length direction of the box, the second surface is provided with an electrode terminal for inputting or outputting electrical energy, the first surface is perpendicular to the width direction of the box, and the battery cell has a fourth surface in the height direction of the box; the battery also includes a heat exchange plate, which is connected to the box; the fourth surface is used to abut against the heat exchange plate, the fourth surface can exchange heat with the heat exchange plate, and the area of ​​the fourth surface is greater than that of the third surface.

[0028] By adopting the technical solution of this embodiment, the area of ​​the fourth surface is larger than that of the third surface, so that the larger surface of the battery cell is in contact with the heat exchange plate, the heat exchange area between the battery cell and the heat exchange plate is large, and the heat exchange effect between the battery cell and the heat exchange plate is good, which is beneficial to improving the performance of the battery.

[0029] In some embodiments, the fourth surface is bonded to the heat exchange plate.

[0030] By adopting the technical solution of this embodiment, the fourth surface of the battery cell is bonded to the heat exchange plate, so that the battery cell and the heat exchange plate are connected as a whole, which is beneficial to improving the structural strength of the battery and improving the modal performance of the battery.

[0031] In some embodiments, the battery cell has a fifth surface arranged opposite to the fourth surface, the box body has a cover plate, the cover plate is connected to the end of the first side beam away from the heat exchange plate, and the fifth surface is bonded to the cover plate.

[0032] By adopting the technical solution of this embodiment, the fifth surface of the battery cell is bonded to the cover plate, so that the battery cell and the cover plate are connected as a whole, which is conducive to improving the structural strength of the battery and improving the modal performance of the battery. In particular, when the battery includes multiple battery cells, the fifth surfaces of the multiple battery cells are all bonded to the cover plate, and the multiple battery cells can be connected as a whole, which is conducive to improving the structural reliability and modal performance of the battery.

[0033] In some embodiments, the battery cell is a rectangular parallelepiped structure, and the size of the battery cell in the height direction of the box is smaller than the size of the battery cell in the length direction of the box.

[0034] By adopting the technical solution of this embodiment, the heat exchange area between the battery cell and the heat exchange plate is large, the heat exchange effect of the battery cell is good, which is beneficial to improving the performance of the battery.

[0035] In some embodiments, there are two first side beams, and the two first side beams are arranged at intervals along the width direction of the box body. The box body also has a second side beam and a third side beam arranged at intervals along the length direction of the box body. The second side beam, the third side beam and the two first side beams are jointly arranged to form a receiving cavity.

[0036] By adopting the technical solution of this embodiment, the second side beam and the third side beam can also play a good supporting role for the two first side beams, and the structural strength of the box body is good, which is beneficial to improving the side impact capability of the box body; in addition, the second side beam, the third side beam and the two first side beams are surrounded to form a receiving cavity, and the structure of the box body is simple and the manufacturing cost is low.

[0037] In some embodiments, the box body also includes a first partition beam, which is located in the receiving cavity, and both ends of the first partition beam are respectively connected to the two first side beams, and the first partition beam is located between the battery cell and the second side beam. A first sub-cavity is formed between the first partition beam and the second side beam, and the heat exchange plate is provided with pipes for the heat exchange medium to flow in and / or out, and at least part of the pipes are accommodated in the first sub-cavity.

[0038] By adopting the technical solution of this embodiment, on the one hand, the first partition beam can support the two first side beams, the structural strength of the box body is good, and the side impact capability of the battery is improved; on the other hand, the first partition beam can separate the pipes of the heat exchange plate from the battery cells, which can reduce the impact of pipe leakage on the battery cells, and can also achieve electro-liquid separation, which is beneficial to improving the reliability of battery use.

[0039] In some embodiments, the box body also includes a second partition beam, which is located in the receiving cavity. Both ends of the second partition beam are respectively connected to the two first side beams. The second partition beam is located between the battery cell and the third side beam. A second sub-cavity is formed between the second partition beam and the third side beam. The second sub-cavity is used to accommodate the battery management components of the battery.

[0040] By adopting the technical solution of this embodiment, on the one hand, the second partition beam can support the two first side beams, the structural strength of the box body is good, and the side impact capability of the battery is improved; on the other hand, the second partition beam can separate the battery management component from the battery cell, so that the mutual influence between the two is conducive to improving the reliability of battery use.

[0041] In a second aspect, an electrical device is provided, comprising the battery as described in the above embodiment.

[0042] The electrical device of the embodiment of the present application adopts the above-mentioned battery, and the battery has good side impact resistance, which is beneficial to improving the structural strength of the electrical device and improving the reliability of the electrical device.

[0043] In some embodiments, the electrical device is a vehicle, and the length direction of the box is parallel to the travel direction of the vehicle.

[0044] By adopting the technical solution of this embodiment, the length direction of the box body is parallel to the driving direction of the vehicle, so that the first surface and the first side beam of the battery cell are parallel to the driving direction of the vehicle. In the case of a side collision of the vehicle, the internal beam, the first side beam and the first surface can jointly withstand the side collision force; on the one hand, the internal beam can withstand part of the side collision force, thereby improving the performance of the battery and the vehicle under side collision and side extrusion conditions; on the other hand, the first surface of the battery cell has the largest area, and the side collision force that the first surface can withstand is greater than that of other surfaces, and the risk of short circuit after extrusion is also lower, which can also further improve the side collision capability of the battery and the vehicle.

[0045] The above description is only an overview of the technical solution of the present application. In order to more clearly understand the technical means of the present application, it can be implemented in accordance with the contents of the specification. In order to make the above and other purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are listed below. BRIEF DESCRIPTION OF THE DRAWINGS

[0046] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0047] Figure 1 A schematic diagram of the structure of a vehicle provided for some embodiments of the present application.

[0048] Figure 2 A schematic diagram of an exploded view of a battery provided for some embodiments of the present application.

[0049] Figure 3 Schematic diagram of the structure of the battery hidden behind the upper cover provided in other embodiments of the present application.

[0050] Figure 4 for Figure 2 Schematic diagram of the structure of the battery cell shown in .

[0051] Figure 5 This is a schematic diagram of the structure of the battery hidden behind the upper cover provided in some other embodiments of the present application.

[0052] Among them, the reference numerals in the figure are:

[0053] 1000, vehicle; 1100, battery; 1200, controller; 1300, motor; 100, box; 101, receiving chamber; 1011, first sub-chamber; 1012, second sub-chamber; 110, side beam; 111, first side beam; 112, second side beam; 113, third side beam; 120, bottom plate; 130, upper cover; 131, cover plate; 140, inner beam; 150, reinforcing beam; 160, middle Beam; 171, first partition beam; 172, second partition beam; 180, mounting beam; 200, battery cell; 201, battery cell group; 210, first side; 211, fourth surface; 212, fifth surface; 220, second side; 221, first surface; 230, third side; 231, second surface; 232, third surface; 240, electrode terminal; 300, heat exchange plate; 310, pipe fitting. DETAILED DESCRIPTION

[0054] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present application more clearly understood, the present application is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0055] 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.

[0056] In the description of the embodiments of the present application, the technical terms "first", "second", etc. are only used to distinguish different objects, and cannot be understood as indicating or implying relative importance or implicitly indicating the number, specific order or primary and secondary relationship of the indicated technical features. Therefore, the features defined as "first" or "second" may explicitly or implicitly include one or more of the features.

[0057] Reference to "embodiments" herein means that the specific features, structures, or characteristics described in conjunction with the embodiments may be included in at least some embodiments 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. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments in any suitable manner.

[0058] In the description of the embodiments of the present application, the term "and / or" is only a description of the association relationship of the associated objects, indicating that there may 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 article generally indicates that the associated objects before and after are in an "or" relationship.

[0059] In the description of the embodiments of the present application, the term "multiple" refers to more than two (including two), and similarly, "multiple groups" refers to more than two groups (including two groups), and "multiple pieces" refers to more than two pieces (including two pieces). "Several" means one or more than one, unless otherwise clearly and specifically defined.

[0060] In the description of the embodiments of the present application, the orientations or positional relationships indicated by technical terms such as "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", and "circumferential" are based on the orientations or positional relationships shown in the accompanying drawings and are only for the convenience of describing the embodiments of the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the embodiments of the present application.

[0061] 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 ordinary technicians in this field, the specific meanings of the above terms in the embodiments of the present application can be understood according to the specific circumstances.

[0062] In the description of the embodiments of the present application, unless otherwise clearly specified and limited, when an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or indirectly on the other element. When an element is referred to as being "connected to" another element, it may be directly connected to the other element or indirectly connected to the other element.

[0063] At present, judging from the development of the market situation, the application of batteries is becoming more and more extensive. Batteries are not only used in energy storage power systems such as hydropower, thermal power, wind power and solar power stations, but also widely used in electric vehicles such as electric bicycles, electric motorcycles, electric cars, as well as military equipment and aerospace and other fields. With the continuous expansion of the application field of power batteries, the market demand is also constantly expanding.

[0064] A battery is provided in the related technology, the length direction of the battery is usually parallel to the driving direction of the vehicle; the battery includes a box body and a battery cell, the surface of the battery cell with the largest area is perpendicular to the length direction of the battery cell, and the battery cell is separated from the outside of the battery only by a side beam, and only the side beam bears the side impact, resulting in poor side impact resistance of the battery.

[0065] An embodiment of the present application provides a battery, in which the first surface of the battery cell with the largest area faces the first side beam extending along the length direction of the box body, the first surface is arranged to face the first side beam, and an internal beam is arranged between the first side beam and the first surface of the battery cell, so that the first surface can be arranged parallel to the length direction of the box body, so that when the vehicle is subjected to a side collision, the internal beam, the first side beam and the first surface jointly bear the side collision force; on the one hand, the internal beam can withstand part of the side collision force, thereby improving the performance of the battery under side collision and side extrusion conditions; on the other hand, the first surface of the battery cell has the largest area, and the first surface can withstand a side collision force greater than other surfaces, and the risk of short circuit after extrusion is also low, which can also further improve the side collision capability of the battery.

[0066] The technical solution provided in the embodiments of the present application can be applied to batteries and electrical devices using batteries.

[0067] The electric device of the embodiment of the present application may be, but is not limited to, a mobile phone, a tablet, a laptop computer, 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.

[0068] For the convenience of description, the following embodiments are described by taking the electric device as a vehicle as an example.

[0069] Please refer to Figure 1 , Figure 1 A schematic diagram of the structure of a vehicle 1000 provided for some embodiments of the present application. The vehicle 1000 may be a fuel vehicle, a gas vehicle or a new energy vehicle, and the new energy vehicle may be a pure electric vehicle, a hybrid vehicle or an extended-range vehicle, etc. A battery 1100 is provided inside the vehicle 1000, and the battery 1100 may be provided at the bottom, head or tail of the vehicle 1000. The battery 1100 may be used to power the vehicle 1000, for example, the battery 1100 may be used as an operating power source for the vehicle 1000. The vehicle 1000 may also include a controller 1200 and a motor 1300, and the controller 1200 is used to control the battery 1100 to power the motor 1300, for example, for starting, navigating and driving the vehicle 1000.

[0070] In some embodiments of the present application, the battery 1100 can not only serve as the operating power source of the vehicle 1000, but also serve as the driving power source of the vehicle 1000, replacing or partially replacing fuel or natural gas to provide driving power for the vehicle 1000.

[0071] See also Figure 2 and Figure 3 As shown, the battery 1100 has a length direction, a width direction and a height direction. The length direction of the battery 1100 can refer to the X direction, the width direction of the battery 1100 can refer to the Y direction, and the height direction of the battery 1100 can refer to the Z direction. The box 100 defines the shape of the battery 1100. The length direction of the box 100 is parallel to the length direction of the battery 1100, the width direction of the box 100 is parallel to the width direction of the battery 1100, and the height direction of the box 100 can be parallel to the height direction of the battery 1100. In addition, it should be noted that the length of the battery 1100 can be less than the width of the battery 1100, or greater than or equal to the width of the battery 1100. When the battery 1100 is installed in the vehicle 1000, the length direction of the battery 1100 can be parallel to the driving direction of the vehicle 1000.

[0072] The battery 1100 mentioned in the embodiment of the present application refers to a single physical module including one or more battery cells 200 to provide higher voltage and capacity.

[0073] In the battery 1100, when there are multiple battery cells 200, the multiple battery cells 200 can be connected in series, in parallel, or in mixed connection. Mixed connection means that the multiple battery cells 200 are both connected in series and in parallel. The multiple battery cells 200 can be directly connected in series, in parallel, or in mixed connection, and then the whole formed by the multiple battery cells 200 is accommodated in the box 100; of course, the battery 1100 can also be a battery module formed by connecting multiple battery cells 200 in series, in parallel, or in mixed connection, and then the multiple battery modules are connected in series, in parallel, or in mixed connection to form a whole, and accommodated in the box 100. The battery 1100 may also include other structures. For example, the battery 1100 may also include a busbar component for realizing electrical connection between the multiple battery cells 200.

[0074] In the present application, the battery cell 200 may include a lithium ion secondary battery, a lithium ion primary battery, a lithium sulfur battery, a sodium lithium ion battery, a sodium ion battery, a lithium metal battery or a magnesium ion battery, etc., and the present embodiment of the application is not limited thereto. The battery cell 200 may be flat, rectangular or in other shapes.

[0075] The battery cell 200 in the embodiment of the present application includes an electrode assembly and a housing, and the electrode assembly is installed in the housing to protect the electrode assembly.

[0076] The electrode assembly consists of a positive electrode sheet, a negative electrode sheet and a separator. The electrode assembly mainly relies on the movement of metal ions between the positive electrode sheet and the negative electrode sheet to work. The positive electrode sheet includes a positive electrode collector and a positive electrode active material layer. The positive electrode active material layer is coated on the surface of the positive electrode collector. The part of the positive electrode collector that is not coated with the positive electrode active material layer protrudes from the part that is coated with the positive electrode active material layer. The part that is not coated with the positive electrode active material layer serves as the positive electrode tab, or a metal conductor is welded on the positive electrode collector and led out to serve as the positive electrode tab. Taking lithium-ion batteries as an example, the material of the positive electrode collector can be aluminum, and the positive electrode active material can be lithium cobalt oxide, lithium iron phosphate, ternary lithium or lithium manganese oxide, etc. The negative electrode sheet includes a negative electrode current collector and a negative electrode active material layer. The negative electrode active material layer is coated on the surface of the negative electrode current collector. The portion of the negative electrode current collector that is not coated with the negative electrode active material layer protrudes from the portion that is coated with the negative electrode active material layer. The portion that is not coated with the negative electrode active material layer serves as a negative electrode tab, or a metal conductor is welded and led out on the negative electrode current collector to serve as a negative electrode tab. The material of the negative electrode current collector may be copper, and the negative electrode active material may be carbon or silicon, etc. In order to ensure that a large current is passed without melting to a certain extent, the number of positive electrode tabs is multiple and stacked together, and the number of negative electrode tabs is multiple and stacked together. It can be understood that in the electrode assembly, the number of positive electrode tabs may be one, and the number of negative electrode tabs may also be one. That is, two groups of tabs are provided on the electrode assembly, each group includes at least one tab, and one group of tabs is a positive electrode tab, and the other group of tabs is a negative electrode tab.

[0077] The electrode assembly can be a wound structure or a laminated structure. The embodiments of the present application are not limited to this. The wound structure is mostly to weld the pole ear to the current collector, and then arrange it in the order of positive electrode sheet-diaphragm-negative electrode sheet-diaphragm; and then wind it to form a cylindrical or square battery cell. The laminated structure is mostly to lead the pole ear on the current collector, arrange the positive electrode sheet, negative electrode sheet and diaphragm in the order of positive electrode sheet-diaphragm-negative electrode sheet-diaphragm, and stack them layer by layer to form a laminated battery cell; wherein, the diaphragm can be cut and directly laminated with the diaphragm sheet, or the diaphragm is not cut, but laminated in a Z-shaped fold. The material of the diaphragm can be PP (Polypropylene, polypropylene) or PE (Polyethylene, polyethylene), etc. The diaphragm is an insulating film arranged between the positive electrode sheet and the negative electrode sheet. Its main function is to isolate the positive and negative electrodes and prevent the electrons in the battery from passing freely, to prevent short circuits to a certain extent, and to allow the ions in the electrolyte to pass freely between the positive and negative electrodes to form a loop between the positive and negative electrodes. The positive electrode sheet and the negative electrode sheet are collectively referred to as the electrode sheet. The positive electrode tab and the negative electrode tab are collectively referred to as the tab.

[0078] The shell refers to a shell structure with a space inside to accommodate and protect the electrode assembly. The shell can be made of a material with a certain hardness and strength, so that the shell is not easily deformed when squeezed or collided, so that the battery cell 200 can have a higher structural strength and the reliability performance can also be improved. The shell can be made of a variety of materials, including but not limited to copper, iron, aluminum, stainless steel, aluminum alloy, plastic, etc.

[0079] The battery cell 200 is provided with an electrode terminal 240. The electrode terminal 240 refers to a conductive part provided on the outer shell. The electrode terminal 240 is connected to the electrode tab of the electrode assembly to output the electric energy of the battery cell 200 or charge the battery cell 200. The battery cell 200 generally has two electrode terminals 240, which are respectively connected to the positive and negative electrode tabs of the electrode assembly. The electrode terminal 240 connected to the positive electrode tab is the positive electrode terminal 240, and the electrode terminal 240 connected to the negative electrode tab is the negative electrode terminal 240. The electrode assembly is connected to the electrode terminal 240 to form the battery cell 200.

[0080] For ease of understanding and description, the embodiments provided in this application are described using only a rectangular parallelepiped battery cell 200 .

[0081] Reference Figures 2 to 4 As shown, in some embodiments of the present application, a battery 1100 is provided, which includes a box body 100 and a battery cell 200, the box body 100 has a receiving cavity 101; the box body 100 has a first side beam 111 extending along the length direction of the box body 100; the battery cell 200 is located in the receiving cavity 101, and the battery cell 200 has a first surface 221 with the largest area, and the first surface 221 is arranged facing the first side beam 111; wherein the box body 100 also includes an internal beam 140 located in the receiving cavity 101, and the internal beam 140 is located between the battery cell 200 and the first side beam 111.

[0082] The box 100 may be a hollow component, and the space inside the box 100 is the receiving chamber 101, which is used to provide an installation space for the battery cell 200, so that the box 100 can protect the battery cell 200 and improve the reliability of the battery 1100. The box 100 may have various structures.

[0083] For example, the box body 100 includes a plurality of side beams 110, which are connected end to end to form an annular frame. The internal space formed by the annular frame is a receiving cavity 101. The openings on opposite sides of the annular frame may be covered with a bottom plate 120 and an upper cover 130, respectively. The bottom plate 120 and the upper cover 130 respectively close the openings on opposite sides of the receiving cavity 101, thereby achieving the closure of the box body 100 to improve the protection of the battery cell 200.

[0084] The box body 100 has a first side beam 111 extending along the length direction of the box body 100. It can be understood that the side beam 110 in the box body 100 parallel to the length direction of the box body 100 is the first side beam 111, that is, the first side beam 111 is parallel to the length direction of the box body 100, so that the first side beam 111 can be parallel to the driving direction of the vehicle 1000. Among them, the length direction of the box body 100 is parallel to the driving direction of the vehicle 1000, and the driving direction of the vehicle 1000 can refer to the forward direction or the backward direction of the vehicle 1000. For example, the driving direction of the vehicle 1000 can refer to the length direction of the vehicle 1000. For details, please refer to Figure 1 The X direction is shown.

[0085] The battery cell 200 has a first surface 221 with the largest area, and the first surface 221 is arranged facing the first side beam 111; it can be understood that the battery cell 200 has multiple surfaces, among which the surface with the largest area is the first surface 221, and the first surface 221 is arranged toward the first side beam 111, so that the first surface 221 is arranged parallel to or nearly parallel to the first side beam 111.

[0086] See also Figure 4 As shown, the battery cell 200 also has a height direction, a length direction and a width direction. The height direction of the battery cell 200 is parallel to the height direction of the box 100, the width direction of the battery cell 200 is parallel to the width direction of the box 100, and the length direction of the battery cell 200 is parallel to the length direction of the box 100. The battery cell 200 includes two first side surfaces 210 distributed along its height direction, and the height of the battery cell 200 is defined between the two first side surfaces 210. The battery cell 200 includes two second side surfaces 220 distributed along its width direction and two third side surfaces 230 distributed along its length direction, and the width of the battery cell 200 is defined between the two second side surfaces 220, and the length of the battery cell 200 is defined between the two third side surfaces 230. The area of ​​the two first side surfaces 210 is defined by the length and width of the battery cell 200, the area of ​​the second side surface 220 is defined by the height and length of the battery cell 200, and the area of ​​the third side surface 230 is defined by the height and width of the battery cell 200. For the rectangular battery cell 200, its length is the largest and the width is the smallest. Therefore, the area of ​​the second side surface 220 is larger than the area of ​​the first side surface 210, and the area of ​​the first side surface 210 is larger than the area of ​​the third side surface 230. The second side surface 220 is the surface with the largest area of ​​the battery cell 200, that is, the first surface 221, also called the large surface.

[0087] The shell defines the shape of the battery cell 200 , the side of the shell is the side of the battery cell 200 , the height of the shell is parallel to the height of the battery cell 200 , the width of the shell is parallel to the width of the battery cell 200 , and the length of the shell is parallel to the length of the battery cell 200 .

[0088] The battery cell 200 has a first surface 221 with the largest area, and the first surface 221 is arranged facing the first side beam 111; it can be understood that the first surface 221 is arranged face to face with the first side beam 111, and the first surface 221 can be parallel or nearly parallel to the length direction of the first side beam 111.

[0089] The box body 100 also includes an internal beam 140 located in the accommodating cavity 101, and the internal beam 140 is located between the battery cell 200 and the first side beam 111; it can be understood that the internal beam 140 is located in the box body 100, and the internal beam 140 is located between the battery cell 200 and the first side beam 111, and the internal beam 140 can separate the first side beam 111 of the battery cell 200; when the first side beam 111 is subjected to a side impact force, the internal beam 140 can bear part of the side impact force, thereby reducing the side impact force received by the battery cell 200, which is beneficial to improving the side impact capability of the battery 1100.

[0090] In the battery 1100 of the embodiment of the present application, the first surface 221 of the battery cell 200 with the largest area is arranged to face the first side beam 111, and an internal beam 140 is provided between the battery cell 200 and the first side beam 111, so that the internal beam 140, the first side beam 111 and the first surface 221 can jointly withstand the side impact force; on the one hand, the internal beam 140 can withstand part of the side impact force, thereby improving the performance of the battery 1100 under side impact and side extrusion conditions; on the other hand, the first surface 221 of the battery cell 200 has the largest area, and the first surface 221 can withstand a larger side impact force than other surfaces, and the risk of short circuit after extrusion is also lower, which can also further improve the side impact capability of the battery 1100.

[0091] In other embodiments of the present application, see Figures 2 to 4 As shown, the inner beam 140 is configured to abut against the first surface 221 .

[0092] The first surface 221 is disposed facing the internal beam 140, and the first surface 221 may be parallel or nearly parallel to the surface of the internal beam 140, so that the first surface 221 may directly abut against the surface of the internal beam 140, or may abut against the internal beam 140 through components such as an insulating pad. During the charge and discharge process of the battery cell 200, the expansion of the first surface 221 is most obvious, and the internal beam 140 abuts against the first surface 221, and the internal beam 140 may limit the expansion of the battery cell 200, and the internal beam 140 may also be called an expansion beam.

[0093] By adopting the technical solution of this embodiment, the internal beam 140 is used to offset the first surface 221, thereby limiting the expansion of the first surface 221, which is beneficial to improving the charging and discharging performance of the battery cell 200. In addition, the internal beam 140 (for example, an expansion beam) of the box body 100 can also be directly used to bear the side impact force without adding other structures. The structure of the box body 100 is simple and the manufacturing cost is lower.

[0094] In some other embodiments of the present application, the inner beam 140 is spaced apart from the first side beam 111 .

[0095] It is understandable that there is a gap between the inner beam 140 and the first side beam 111. For example, the inner beam 140 may be arranged parallel to the first side beam 111 and spaced apart.

[0096] By adopting the technical solution of this embodiment, a gap exists between the internal beam 140 and the first side beam 111. The gap can provide deformation space and buffer space for the first side beam 111, which is beneficial to reducing the side collision force on the battery cell 200 and the internal beam 140, and is beneficial to improving the side collision capability of the battery 1100.

[0097] In other embodiments of the present application, see Figure 2 and Figure 3 As shown, there are two internal beams 140 , which are arranged at intervals along the width direction of the box body 100 , and the battery cell 200 is located between the two internal beams 140 ; ​​the box body 100 also includes a middle beam 160 , and both ends of the middle beam 160 are connected between the two internal beams 140 .

[0098] The middle beam 160 may refer to a beam structure connected to the two inner beams 140 .

[0099] The two second side surfaces 220 of the battery cell 200 that are relatively distributed in the width direction of the box body 100 are both first surfaces 221. The internal beam 140 is parallel to the length direction of the box body 100. The two internal beams 140 are arranged in parallel and spaced apart along the width direction of the box body 100. The battery cell 200 is located between the two internal beams 140. In this way, the two internal beams 140 can protect the two first surfaces 221 of the battery cell 200 from both sides in the width direction of the box body 100. In addition, the two first surfaces 221 of the battery cell 200 are respectively offset against the two internal beams 140, which can limit the expansion of the two first surfaces 221 of the battery cell 200. The battery cell 200 has a good expansion restriction effect and a better charge and discharge performance. The middle parts of the two internal beams 140 are respectively connected to the two ends of the middle beam 160. The middle beam 160 and the two internal beams 140 form an I-shaped structure. Of course, in other embodiments, the middle beam 160 can also be arranged obliquely relative to the internal beams 140.

[0100] By adopting the technical solution of this embodiment, the middle beam 160 can support the two internal beams 140, the internal beams 140 can withstand greater side impact forces, and the battery 1100 has better side impact resistance.

[0101] In other embodiments of the present application, see Figure 5 As shown, the box body 100 further includes a reinforcing beam 150 , which is connected between the first side beam 111 and the inner beam 140 .

[0102] The reinforcing beam 150 may refer to a beam structure located between the first side beam 111 and the inner beam 140 . The reinforcing beam 150 is located in the gap between the first side beam 111 and the inner beam 140 , and both ends of the reinforcing beam 150 are respectively connected to the first side beam 111 and the inner beam 140 .

[0103] By adopting the technical solution of this embodiment, the reinforcing beam 150 can support the first side beam 111, the first side beam 111 can withstand a greater side impact force, and the battery 1100 has better side impact resistance.

[0104] In other embodiments of the present application, see Figure 2 and Figure 5 As shown, the inner beam 140 and the middle beam 160 are connected to corresponding positions with the reinforcing beam 150 .

[0105] The middle beam 160 and the reinforcing beam 150 are respectively located on opposite sides of the inner beam 140, and the position where the inner beam 140 is connected to the middle beam 160 is also connected to the reinforcing beam 150. For example, the middle beam 160 and the corresponding reinforcing beam 150 are located on the same straight line.

[0106] By adopting the technical solution of this embodiment, the reinforcing beam 150 is connected to the corresponding position of the inner beam 140 and the middle beam 160, which can better increase the structural strength of the connection position between the inner beam 140 and the middle beam 160 and better improve the side impact capability of the battery 1100.

[0107] In other embodiments of the present application, see Figure 5 As shown, there are multiple reinforcing beams 150 , and the multiple reinforcing beams 150 are arranged at intervals along the length direction of the box body 100 .

[0108] A plurality of reinforcing beams 150 are disposed in the gap between the inner beam 140 and the first side beam 111 , and the plurality of reinforcing beams 150 are arranged along the length direction of the box body 100 .

[0109] By adopting the technical solution of this embodiment, the design of multiple reinforcing beams 150 can better increase the structural strength between the first side beam 111 and the internal beam 140, and the multiple reinforcing beams 150 are arranged along the length direction of the box body 100, so that the box body 100 has better side impact capability in the length direction, which is beneficial to improving the side impact capability of the battery 1100.

[0110] In other embodiments of the present application, see Figure 2 and Figure 3 As shown, there are multiple battery cells 200 , which are divided into multiple battery cell groups 201 . The multiple battery cell groups 201 are arranged at intervals along the length direction of the box body 100 , and a middle beam 160 is provided between two adjacent battery cell groups 201 .

[0111] The battery 1100 contains a plurality of battery cells 200, which are divided into a plurality of battery cell groups 201, so that the battery cells 200 can be grouped and then placed in the box 100, which is convenient for assembling the battery cells 200 and the box 100; each battery cell group 201 can include one or more battery cells 200, which can be set according to actual needs. The number of battery cell groups 201 can be two, three or more than four.

[0112] The plurality of battery cell groups 201 are arranged at intervals along the length direction of the box body 100 . The battery cell groups 201 are arranged in an orderly manner, which is beneficial to improving the assembly of the box body 100 and the battery cell groups 201 .

[0113] An intermediate beam 160 is disposed between two adjacent battery cell groups 201 , and battery cells 200 are disposed on opposite sides of the intermediate beam 160 , so that the space in the box body 100 can be fully utilized.

[0114] By adopting the technical solution of this embodiment, multiple battery cells 200 are arranged in groups, which facilitates the assembly of the battery cells 200 and the box body 100; in addition, an intermediate beam 160 is provided between two adjacent battery cell groups 201, which can fully utilize the space on the opposite sides of the intermediate beam 160, which is beneficial to improving the energy density of the battery 1100.

[0115] In other embodiments of the present application, see Figure 2 As shown, each battery cell group 201 includes two columns of battery cells 200, and the two columns of battery cells 200 are arranged along the length direction of the box body 100; in two adjacent columns of battery cells 200, the surfaces of the two battery cells 200 arranged along the length direction of the box body 100 that are away from each other are provided with electrode terminals 240 for inputting or outputting electrical energy.

[0116] The battery cell group 201 includes two columns of battery cells 200, and the two columns of battery cells 200 are arranged along the length direction of the box 100. Each column of battery cells 200 may include one or more battery cells 200. When the same column of battery cells 200 includes multiple battery cells 200, the multiple battery cells 200 can be arranged along the width direction of the box 100. In this way, the battery cells 200 are arranged in a matrix, and the battery cells 200 are arranged regularly, which can facilitate the electrical connection between the battery cells 200 and the assembly of the battery cells 200 and the box 100.

[0117] In two adjacent columns of battery cells 200 , the surfaces of the two battery cells 200 arranged along the length direction of the box body 100 facing each other are understood to have electrode terminals 240 on their third side surfaces 230 , and the electrode terminals 240 of the two battery cells 200 are arranged back to back.

[0118] For example, the battery 1100 includes four columns of battery cells 200, the first two columns of battery cells 200 are located on one side of the middle beam 160, and the last two columns of battery cells 200 are located on the other side of the middle beam 160, the electrode terminals 240 of the first two columns of battery cells 200 are arranged back to back, and the electrode terminals 240 of the last two columns of battery cells 200 are arranged back to back.

[0119] By adopting the technical solution of this embodiment, the electrode terminals 240 of the two battery cells 200 arranged along the length direction of the box body 100 are relatively separated from each other, which is beneficial to reduce the mutual influence between the electrode terminals 240 of the two battery cells 200 and improve the reliability of the battery 1100; in addition, it is also convenient to connect the surface of the battery cell 200 in the height direction with the heat exchange plate 300, the upper cover 130 and the bottom plate 120, so as to improve the heat exchange efficiency and modal performance of the battery 1100.

[0120] In other embodiments of the present application, see Figure 2 As shown, the box body 100 further includes a mounting beam 180 for mounting, and the mounting beam 180 is connected to the side of the first side beam 111 facing away from the battery cell 200 .

[0121] The mounting beam 180 may refer to a beam component used to fix the battery 1100 in the electrical device. For example, the mounting beam 180 may be fixed in the electrical device by bolts, screws, bonding, etc.

[0122] The mounting beam 180 and the internal beam 140 are respectively located on opposite sides of the first side beam 111, wherein the internal beam 140 is located inside the box body 100, and the mounting beam 180 is located outside the box body 100 to facilitate mounting connection; the mounting beam 180 is connected to the first side beam 111, and the mounting beam 180 and the first side beam 111 can be connected by welding, bonding, bolts, screws, etc.

[0123] By adopting the technical solution of this embodiment, the mounting beam 180 can also bear a part of the side impact force, which is also beneficial to improving the side impact resistance of the battery 1100.

[0124] In other embodiments of the present application, see Figure 2 As shown, the battery cell 200 has a second surface 231 and a third surface 232 that are relatively distributed in the length direction of the box body 100, the second surface 231 is provided with an electrode terminal 240 for inputting or outputting electric energy, the first surface 221 is perpendicular to the width direction of the box body 100, and the battery cell 200 has a fourth surface 211 in the height direction of the box body 100;

[0125] The battery 1100 also includes a heat exchange plate 300 , which is connected to the box body 100 ; the fourth surface 211 is used to abut against the heat exchange plate 300 , and the fourth surface 211 can exchange heat with the heat exchange plate 300 , and the area of ​​the fourth surface 211 is greater than the area of ​​the third surface 232 .

[0126] Of the two surfaces of the battery cell 200 that are relatively distributed in the length direction of the box body 100, the surface on which the electrode terminal 240 is disposed is the second surface 231, and the other surface on which the electrode terminal 240 is not disposed is the third surface 232. By way of example, of the two third side surfaces 230, the third side surface 230 on which the electrode terminal 240 is disposed is the second surface 231, and the other third side surface 230 is the third surface 232.

[0127] Of the two surfaces of the battery cell 200 that are relatively distributed in the width direction of the box 100 , the surface with the largest area is the first surface 221 . If the two surfaces have the same area, both surfaces can be referred to as the first surface 221 , that is, the two second side surfaces 220 mentioned above are both the first surface 221 .

[0128] Among the two surfaces of the battery cell 200 that are relatively distributed in the height direction of the box body 100, the surface that abuts against the heat exchange plate 300 for heat exchange is the fourth surface 211, and the other surface is the fifth surface 212; by way of example, among the above-mentioned two first side surfaces 210, the first side surface 210 abutting against the heat exchange plate 300 is the fourth surface 211, and the other first side surface 210 is the fifth surface 212.

[0129] The heat exchange plate 300 may refer to a component that can exchange heat with the battery cell 200; for example, a flow channel may be provided inside the heat exchange plate 300, and a flowing heat exchange medium is provided in the flow channel to take away the heat of the battery cell 200 or bring heat to the battery cell 200, so as to achieve heating or cooling of the battery cell 200, thereby achieving temperature control of the battery cell 200. The heat exchange medium may be, but is not limited to, air, water, coolant, etc. The heat exchange plate 300 may be used as the bottom plate 120 or the upper cover 130 of the box 100 to close the opening of the box 100; the heat exchange plate 300 may also be a component inside the box 100, that is, the heat exchange plate 300 is located on the inner side of the upper cover 130 or the bottom plate 120 to protect the heat exchange plate 300. Of course, the heat exchange plate 300 may also be an electric heating plate or an electric cooling plate.

[0130] By adopting the technical solution of this embodiment, the area of ​​the fourth surface 211 is larger than the area of ​​the third surface 232, so that the larger surface of the battery cell 200 is in contact with the heat exchange plate 300, the heat exchange area between the battery cell 200 and the heat exchange plate 300 is large, and the heat exchange effect between the battery cell 200 and the heat exchange plate 300 is good, which is beneficial to improving the performance of the battery 1100.

[0131] In other embodiments of the present application, see Figure 2 As shown, the fourth surface 211 is bonded to the heat exchange plate 300 .

[0132] The fourth surface 211 is bonded to the heat exchange plate 300 by an adhesive, and the adhesive has a certain thermal conductivity to enable heat exchange between the heat exchange plate 300 and the battery cell 200. The adhesive may refer to but is not limited to polyurethane structural adhesive, polyimide structural adhesive, etc.

[0133] By adopting the technical solution of this embodiment, the fourth surface 211 of the battery cell 200 is bonded to the heat exchange plate 300, so that the battery cell 200 and the heat exchange plate 300 are connected as a whole, which is conducive to improving the structural strength of the battery 1100 and improving the modal performance of the battery 1100. In particular, when the battery 1100 includes multiple battery cells 200, the fourth surfaces 211 of the multiple battery cells 200 are all bonded to the heat exchange plate 300, and the multiple battery cells 200 can be connected as a whole, which is conducive to improving the structural reliability and modal performance of the battery 1100.

[0134] In other embodiments of the present application, see Figure 2 As shown, the battery cell 200 has a fifth surface 212 arranged opposite to the fourth surface 211 , the box body 100 has a cover plate 131 , the cover plate 131 is connected to the end of the first side beam 111 away from the heat exchange plate 300 , and the fifth surface 212 is bonded to the cover plate 131 .

[0135] The cover plate 131 may refer to a component used to cover the opening of the box body 100 facing away from the heat exchange plate 300. When the heat exchange plate 300 is located below the battery cell 200, the cover plate 131 is the upper cover 130; when the heat exchange plate 300 is located above the battery cell 200, the cover plate 131 is the bottom plate 120. The cover plate 131 and the first side beam 111 may be connected by bolts, bonding, or the like.

[0136] The fifth surface 212 is bonded to the cover plate 131 by an adhesive. The adhesive may be, but is not limited to, polyurethane structural adhesive, polyimide structural adhesive, and the like.

[0137] By adopting the technical solution of this embodiment, the fifth surface 212 of the battery cell 200 is bonded to the cover plate 131, so that the battery cell 200 and the cover plate 131 are connected as a whole, which is conducive to improving the structural strength of the battery 1100 and improving the modal performance of the battery 1100. In particular, when the battery 1100 includes multiple battery cells 200, the fifth surfaces 212 of the multiple battery cells 200 are all bonded to the cover plate 131, and the multiple battery cells 200 can be connected as a whole, which is conducive to improving the structural reliability and modal performance of the battery 1100.

[0138] In other embodiments of the present application, see Figure 4 As shown, the battery cell 200 is a rectangular parallelepiped structure, and the size of the battery cell 200 in the height direction of the box body 100 is smaller than the size of the battery cell 200 in the length direction of the box body 100 .

[0139] The battery cell 200 is in the shape of a rectangular parallelepiped, and the battery cell 200 may be a square shell battery 1100, a soft-pack battery 1100, etc.; the size of the battery cell 200 in the height direction of the box body 100 may refer to the height of the battery cell 200, and the size of the battery cell 200 in the length direction of the box body 100 may refer to the length of the battery cell 200. The length of the battery cell 200 is greater than the height of the battery cell 200, so that the area of ​​the first side 210 is greater than the area of ​​the second side 220, that is, the area of ​​the fourth surface 211 is greater than the area of ​​the third surface 232.

[0140] By adopting the technical solution of this embodiment, the heat exchange area between the battery cell 200 and the heat exchange plate 300 is large, and the heat exchange effect of the battery cell 200 is good, which is beneficial to improving the performance of the battery 1100.

[0141] In other embodiments of the present application, see Figure 2 and Figure 3As shown, there are two first side beams 111, and the two first side beams 111 are arranged at intervals along the width direction of the box body 100. The box body 100 also has a second side beam 112 and a third side beam 113 arranged at intervals along the length direction of the box body 100. The second side beam 112, the third side beam 113 and the two first side beams 111 are jointly arranged to form the accommodating cavity 101.

[0142] The two first side beams 111 are two side beams 110 that are relatively distributed in the width direction of the box body 100, the second side beam 112 and the third side beam 113 are two side beams 110 that are relatively distributed in the length direction of the box body 100, the second side beam 112, the third side beam 113 and the two first side beams 111 are connected end to end in sequence to form the above-mentioned annular frame, and the internal space surrounded by the annular frame is the receiving cavity 101. The two first side beams 111 define the width dimension of the box body 100, the second side beam 112 and the third side beam 113 define the length dimension of the box body 100, the second side beam 112 and the third side beam 113 can be straight or curved, and their specific shapes can be set according to actual needs.

[0143] By adopting the technical solution of this embodiment, the second side beam 112 and the third side beam 113 can also play a good supporting role for the two first side beams 111, and the structural strength of the box body 100 is good, which is beneficial to improving the side collision capability of the box body 100; in addition, the second side beam 112, the third side beam 113 and the two first side beams 111 are surrounded to form the accommodating cavity 101, and the structure of the box body 100 is simple and the manufacturing cost is low.

[0144] In other embodiments of the present application, see Figure 2 and Figure 3 As shown, the box body 100 also includes a first partition beam 171, which is located in the receiving cavity 101, and both ends of the first partition beam 171 are respectively connected to the two first side beams 111, and the first partition beam 171 is located between the battery cell 200 and the second side beam 112. A first sub-cavity 1011 is formed between the first partition beam 171 and the second side beam 112, and the heat exchange plate 300 is provided with a pipe fitting 310 for the heat exchange medium to flow in and / or out, and at least a portion of the pipe fitting 310 is accommodated in the first sub-cavity 1011.

[0145] The first partition beam 171 may refer to a beam component located between the battery cell 200 and the second side beam 112. Both ends of the first partition beam 171 are respectively connected to the ends of the two first side beams 111 close to the second side beam 112. The battery cell 200 is located on the side of the first partition beam 171 facing away from the second side beam 112. The first partition beam 171 may support the two first side beams 111. The box body 100 has good structural strength, which improves the side collision resistance of the battery 1100.

[0146] The first partition beam 171 and the second side beam 112 are arranged to form a first sub-cavity 1011. The first partition beam 171 can be spaced apart from the second side beam 112 so that the gap between the first partition beam 171 and the second side beam 112 forms the first sub-cavity 1011. Alternatively, the second side beam 112 is recessed away from the first partition beam 171, and the recessed space of the second side beam 112 forms the first sub-cavity 1011. Of course, the first sub-cavity 1011 can also be formed by other structures.

[0147] The pipe fitting 310 may refer to a pipe fitting 310 connected to the flow channel inside the heat exchange plate 300; the pipe fitting 310 may include a pipe, which is used to guide the heat exchange medium to flow out of the flow channel of the heat exchange plate 300 or to supply the heat exchange medium to flow out of the flow channel of the heat exchange plate 300; the pipe fitting 310 may also include two pipes, one of which is used to guide the heat exchange medium to flow out of the flow channel of the heat exchange plate 300, and the other is used to supply the heat exchange medium to flow out of the flow channel of the heat exchange plate 300, that is, the heat exchange medium flows into the flow channel of the heat exchange plate 300 from one pipe, and then, after the heat exchange medium exchanges heat with the battery cell 200, it flows out from another pipe, so that the heat exchange of the battery cell 200 can be achieved.

[0148] The pipe fitting 310 may refer to a portion located in the first sub-cavity 1011, or the pipe fitting 310 may be entirely located in the first sub-cavity 1011. For example, a portion of the pipe fitting 310 is located in the first sub-cavity 1011, and another portion of the pipe fitting 310 passes through the second side beam 112, so as to facilitate the connection of the pipe with the external pipeline of the box body 100 to realize the circulation flow of the heat exchange medium.

[0149] By adopting the technical solution of this embodiment, on the one hand, the first partition beam 171 can support the two first side beams 111, and the structural strength of the box body 100 is good, thereby improving the side impact resistance of the battery 1100; on the other hand, the first partition beam 171 can separate the pipe 310 of the heat exchange plate 300 from the battery cell 200, thereby reducing the impact of leakage of the pipe 310 on the battery cell 200, and realizing electro-liquid separation, which is beneficial to improving the reliability of the battery 1100.

[0150] In other embodiments of the present application, see Figure 2 and Figure 3 As shown, the box body 100 also includes a second partition beam 172, which is located in the receiving cavity 101, and the two ends of the second partition beam 172 are respectively connected to the two first side beams 111, and the second partition beam 172 is located between the battery cell 200 and the third side beam 113. A second sub-cavity 1012 is formed between the second partition beam 172 and the third side beam 113, and the second sub-cavity 1012 is used to accommodate the battery management components of the battery 1100.

[0151] The second partition beam 172 may refer to a beam component located between the battery cell 200 and the third side beam 113. Both ends of the second partition beam 172 are respectively connected to the ends of the two first side beams 111 close to the third side beam 113. The second partition beam 172 may support the two first side beams 111. The box body 100 has good structural strength, which improves the side impact resistance of the battery 1100.

[0152] The battery cell 200 is located on the side of the second partition beam 172 facing away from the third side beam 113, and the second partition beam 172 and the third side beam 113 are arranged to form a second sub-cavity 1012. The second partition beam 172 can be spaced apart from the third side beam 113, so that the gap between the second partition beam 172 and the third side beam 113 forms the second sub-cavity 1012, or the third side beam 113 is recessed away from the second partition beam 172, and the recessed space of the third side beam 113 forms the second sub-cavity 1012. Of course, other structures can also be used to form the second sub-cavity 1012.

[0153] The battery management component may refer to a component used to monitor, control and protect the battery 1100. Under the control of the battery management component, the battery 1100 can operate in a safe and efficient working state, thereby improving the reliability of the battery 1100. The battery management component may include but is not limited to a battery 1100 management system (Battery Management System, referred to as BMS), a distribution box and other components.

[0154] By adopting the technical solution of this embodiment, on the one hand, the second partition beam 172 can support the two first side beams 111, the structural strength of the box body 100 is good, and the side impact capability of the battery 1100 is improved; on the other hand, the second partition beam 172 can separate the battery management component from the battery cell 200, so that the mutual influence between the two is conducive to improving the reliability of the battery 1100.

[0155] In some embodiments, the box body 100 also includes a first partition beam 171 and a second partition beam 172, the first partition beam 171 and the second partition beam 172 are located in the receiving cavity 101, the two ends of the first partition beam 171 are respectively connected to one end of the two first side beams 111, and the two ends of the second partition beam 172 are respectively connected to the other end of the two first side beams 111, the battery cell 200 is located between the first partition beam 171 and the second partition beam 172, and a first sub-cavity 1011 is formed between the first partition beam 171 and the second side beam 112, the heat exchange plate 300 is provided with a pipe 310 for the heat exchange medium to flow in and / or out, at least a portion of the pipe 310 is accommodated in the first sub-cavity 1011, and a second sub-cavity 1012 is formed between the second partition beam 172 and the third side beam 113, and the second sub-cavity 1012 is used to accommodate the battery management components of the battery 1100. The first partition beam 171 and the second partition beam 172 divide the receiving chamber 101 into three sub-cavities. The sub-cavity close to the second side beam 112 is the first sub-cavity 1011, and the sub-cavity close to the third side beam 113 is the second sub-cavity 1012. The battery cell 200 is received in the sub-cavity between the first partition beam 171 and the second partition beam 172, so that the electro-hydraulic separation can be achieved, and the separation of the battery cell 200 and the battery management components can be achieved, which is beneficial to improving the reliability of the battery 1100. In addition, both ends of the first side beam 111 are supported, the structural reliability of the box body 100 is better, and the side collision resistance of the battery 1100 is better.

[0156] The present application is described below in conjunction with some specific embodiments.

[0157] Embodiment 1

[0158] In this embodiment, see Figures 2 to 4 As shown, the battery 1100 includes a box body 100 and a battery cell 200, the box body 100 has a receiving cavity 101; the box body 100 has a first side beam 111 extending along the length direction of the box body 100; the battery cell 200 is located in the receiving cavity 101, and the battery cell 200 has a first surface 221 with the largest area, and the first surface 221 is arranged facing the first side beam 111; wherein the box body 100 also includes an internal beam 140 located in the receiving cavity 101, and the internal beam 140 is located between the battery cell 200 and the first side beam 111.

[0159] In this embodiment, the inner beam 140 is used to abut against the first surface 221 .

[0160] In this embodiment, the inner beam 140 is spaced apart from the first side beam 111 .

[0161] In this embodiment, there are two internal beams 140 , which are arranged at intervals along the width direction of the box body 100 , and the battery cell 200 is located between the two internal beams 140 ; ​​the box body 100 also includes a middle beam 160 , and both ends of the middle beam 160 are connected between the two internal beams 140 .

[0162] In this embodiment, there are multiple battery cells 200 , which are divided into multiple battery cell groups 201 . The multiple battery cell groups 201 are arranged at intervals along the length direction of the box 100 , and a middle beam 160 is provided between two adjacent battery cell groups 201 .

[0163] In this embodiment, each battery cell group 201 includes two columns of battery cells 200, and the two columns of battery cells 200 are arranged along the length direction of the box body 100; in two adjacent columns of battery cells 200, surfaces of the two battery cells 200 arranged along the length direction of the box body 100 away from each other are provided with electrode terminals 240 for inputting or outputting electrical energy.

[0164] In this embodiment, the box body 100 further includes a mounting beam 180 for mounting, and the mounting beam 180 is connected to the side of the first side beam 111 facing away from the battery cell 200 .

[0165] In this embodiment, the battery cell 200 has a second surface 231 and a third surface 232 that are relatively distributed in the length direction of the box body 100, the second surface 231 is provided with an electrode terminal 240 for inputting or outputting electric energy, the first surface 221 is perpendicular to the width direction of the box body 100, and the battery cell 200 has a fourth surface 211 in the height direction of the box body 100;

[0166] The battery 1100 also includes a heat exchange plate 300 , which is connected to the box body 100 ; the fourth surface 211 is used to abut against the heat exchange plate 300 , and the fourth surface 211 can exchange heat with the heat exchange plate 300 , and the area of ​​the fourth surface 211 is greater than the area of ​​the third surface 232 .

[0167] In this embodiment, the fourth surface 211 is bonded to the heat exchange plate 300 .

[0168] In this embodiment, the battery cell 200 has a fifth surface 212 arranged opposite to the fourth surface 211 , the box body 100 has a cover plate 131 , the cover plate 131 is connected to the end of the first side beam 111 away from the heat exchange plate 300 , and the fifth surface 212 is bonded to the cover plate 131 .

[0169] In the present embodiment, the battery cell 200 is a rectangular parallelepiped structure, and the size of the battery cell 200 in the height direction of the housing 100 is smaller than the size of the battery cell 200 in the length direction of the housing 100 .

[0170] In this embodiment, there are two first side beams 111, and the two first side beams 111 are arranged at intervals along the width direction of the box body 100. The box body 100 also has a second side beam 112 and a third side beam 113 arranged at intervals along the length direction of the box body 100. The second side beam 112, the third side beam 113 and the two first side beams 111 are jointly arranged to form the accommodating cavity 101.

[0171] In this embodiment, the box body 100 also includes a first partition beam 171, which is located in the receiving cavity 101. The two ends of the first partition beam 171 are respectively connected to the two first side beams 111. The first partition beam 171 is located between the battery cell 200 and the second side beam 112. A first sub-cavity 1011 is formed between the first partition beam 171 and the second side beam 112. The heat exchange plate 300 is provided with a pipe fitting 310 for the heat exchange medium to flow in and / or out, and at least a portion of the pipe fitting 310 is accommodated in the first sub-cavity 1011.

[0172] In this embodiment, the box body 100 also includes a second partition beam 172, which is located in the receiving cavity 101. The two ends of the second partition beam 172 are respectively connected to the two first side beams 111. The second partition beam 172 is located between the battery cell 200 and the third side beam 113. A second sub-cavity 1012 is formed between the second partition beam 172 and the third side beam 113. The second sub-cavity 1012 is used to accommodate the battery management components of the battery 1100.

[0173] Embodiment 2

[0174] The difference between this embodiment and the first embodiment is that: Figure 5 As shown, the box body 100 further includes a reinforcing beam 150 , which is connected between the first side beam 111 and the inner beam 140 .

[0175] In this embodiment, the inner beam 140 and the middle beam 160 are connected to corresponding positions with the reinforcement beam 150 .

[0176] In this embodiment, there are multiple reinforcing beams 150 , and the multiple reinforcing beams 150 are arranged along the length direction of the box body 100 .

[0177] In other embodiments of the present application, an electrical device is provided, comprising the battery 1100 as described in the above embodiments.

[0178] The electric device of the embodiment of the present application adopts the above-mentioned battery 1100. The battery 1100 has good side impact resistance, which is beneficial to improving the structural strength of the electric device and improving the reliability of the electric device.

[0179] In other embodiments of the present application, the electrical device is a vehicle 1000 , and the length direction of the box 100 is parallel to the driving direction of the vehicle 1000 .

[0180] By adopting the technical solution of this embodiment, the length direction of the box body 100 is parallel to the driving direction of the vehicle 1000, so that the first surface 221 and the first side beam 111 of the battery cell 200 are parallel to the driving direction of the vehicle 1000. In the case of a side collision of the vehicle 1000, the internal beam 140, the first side beam 111 and the first surface 221 can jointly withstand the side collision force; on the one hand, the internal beam 140 can withstand part of the side collision force, thereby improving the performance of the battery 1100 and the vehicle 1000 under side collision and side extrusion conditions; on the other hand, the first surface 221 of the battery cell 200 has the largest area, and the first surface 221 can withstand a larger side collision force than other surfaces, and the risk of short circuit after extrusion is also lower, which can also further improve the side collision capability of the battery 1100 and the vehicle 1000.

[0181] The above description of various embodiments tends to emphasize the differences between the various embodiments. The same or similar aspects can be referenced to each other, and for the sake of brevity, they will not be repeated herein.

[0182] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them; although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein by equivalents; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application, and they should all be included in the scope of the claims and specification of the present application. In particular, as long as there is no structural conflict, the various technical features mentioned in the various embodiments can be combined in any way. The present application is not limited to the specific embodiments disclosed herein, but includes all technical solutions that fall within the scope of the claims.

Claims

1. A battery, characterized in that: include, The box body has a receiving cavity; the box body has a first side beam extending along the length direction of the box body; A battery cell is located in the receiving cavity, the battery cell has a first surface with the largest area, and the first surface is arranged facing the first side beam; Wherein, the box body further includes an internal beam located in the receiving cavity, and the internal beam is located between the battery cell and the first side beam.

2. The battery according to claim 1, characterized in that: The inner beam is configured to abut against the first surface.

3. The battery according to claim 1, characterized in that: The inner beam is spaced apart from the first side beam.

4. The battery according to any one of claims 1 to 3, characterized in that: There are two internal beams, which are arranged at intervals along the width direction of the box body, and the battery cell is located between the two internal beams; the box body also includes a middle beam, and both ends of the middle beam are connected between the two internal beams.

5. The battery according to claim 4, characterized in that: The box body further includes a reinforcing beam connected between the first side beam and the inner beam.

6. The battery according to claim 5, characterized in that: The reinforcing beam is connected to corresponding positions of the inner beam and the middle beam.

7. The battery according to claim 5 or 6, characterized in that: There are multiple reinforcing beams, and the multiple reinforcing beams are arranged along the length direction of the box body.

8. The battery according to claim 4, characterized in that: There are multiple battery cells, and the multiple battery cells are divided into multiple battery groups. The multiple battery groups are arranged at intervals along the length direction of the box body, and the middle beam is provided between two adjacent battery groups.

9. The battery according to claim 8, characterized in that: Each battery pack includes two columns of battery cells, which are arranged along the length direction of the box; in two adjacent columns of battery cells, surfaces of two battery cells arranged along the length direction of the box that are away from each other are provided with electrode terminals for inputting or outputting electrical energy.

10. The battery according to any one of claims 1 to 3, characterized in that: The box body further includes a mounting beam for mounting, and the mounting beam is connected to a side of the first side beam facing away from the battery cell.

11. The battery according to any one of claims 1 to 3, characterized in that: The battery cell has a second surface and a third surface that are relatively distributed in the length direction of the box, the second surface is provided with an electrode terminal for inputting or outputting electric energy, the first surface is perpendicular to the width direction of the box, and the battery cell has a fourth surface in the height direction of the box; The battery further includes a heat exchange plate connected to the box body; the fourth surface is used to abut against the heat exchange plate, the fourth surface can exchange heat with the heat exchange plate, and the area of ​​the fourth surface is greater than that of the third surface.

12. The battery according to claim 11, characterized in that: The fourth surface is bonded to the heat exchange plate.

13. The battery according to claim 11, characterized in that: The battery cell has a fifth surface arranged opposite to the fourth surface, the box body has a cover plate, the cover plate is connected to the end of the first side beam away from the heat exchange plate, and the fifth surface is bonded to the cover plate.

14. The battery according to claim 11, characterized in that: The battery cell is a rectangular parallelepiped structure, and a dimension of the battery cell in a height direction of the box body is smaller than a dimension of the battery cell in a length direction of the box body.

15. The battery according to claim 11, characterized in that: The number of the first side beams is two, and the two first side beams are arranged at intervals along the width direction of the box body. The box body also has a second side beam and a third side beam arranged at intervals along the length direction of the box body. The second side beam, the third side beam and the two first side beams are jointly arranged to form a receiving cavity.

16. The battery according to claim 15, characterized in that: The box body also includes a first partition beam, which is located in the receiving cavity, and the two ends of the first partition beam are respectively connected to the two first side beams, and the first partition beam is located between the battery cell and the second side beam. A first sub-cavity is formed between the first partition beam and the second side beam, and the heat exchange plate is provided with a pipe for allowing the heat exchange medium to flow in and / or out, and at least a portion of the pipe is accommodated in the first sub-cavity.

17. The battery according to claim 15, characterized in that: The box body also includes a second partition beam, which is located in the receiving cavity. Both ends of the second partition beam are respectively connected to the two first side beams. The second partition beam is located between the battery cell and the third side beam. A second sub-cavity is formed between the second partition beam and the third side beam. The second sub-cavity is used to accommodate the battery management components of the battery.

18. An electrical device, characterized in that: A battery comprising the battery according to any one of claims 1 to 17.

19. The electrical device according to claim 18, characterized in that: The electrical device is a vehicle, and the length direction of the box is parallel to the driving direction of the vehicle.

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