Battery and electric device

Abstract

The invention discloses a battery and a power utilization device. The battery comprises a box body, a heat exchange assembly and at least one battery monomer, wherein the box body comprises a plurality of first side beams, and the plurality of first side beams are connected and define a first accommodating cavity; the at least one battery monomer is positioned in the first accommodating cavity; the heat exchange assembly is positioned in the first accommodating cavity and comprises at least one heat exchange piece for exchanging heat with the battery monomers; the at least one first side beam is provided with the accommodating groove, and at least part of the at least one heat exchange piece is accommodated in the accommodating groove, so that the internal space of the box body can be saved, the improvement of the space utilization rate of the battery and the improvement of the structural compactness of the battery are facilitated, and the volume energy density of the battery is improved.

Description

Batteries and electrical devices Technical Field

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

[0002] Energy conservation and emission reduction are crucial to the sustainable development of the automotive industry. Against this backdrop, electric vehicles, due to their energy-saving and environmentally friendly characteristics, have become a core component of the industry's sustainable development. However, battery technology is a key factor influencing the development of electric vehicles.

[0003] In related technologies, in order to improve the performance of electric vehicles, electric vehicles impose strict restrictions on the volume of batteries. However, the maximum single-trip mileage of electric vehicles mainly depends on the energy density of the battery, which refers to the energy released per unit volume of the battery. As the requirements for the cruising range of electric vehicles continue to increase, how to improve the volume energy density of batteries remains an unresolved problem.

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

[0005] Application Contents

[0006] The purpose of the embodiments of the present application is to provide a battery and an electrical device that can improve the volume energy density of the battery.

[0007] The technical solution adopted in the embodiment of this application is:

[0008] In a first aspect, a battery is provided, which includes a box body, a heat exchange assembly and at least one battery cell: the box body includes a plurality of first side beams, which are connected and enclosed to form a first receiving cavity; at least one battery cell is located in the first receiving cavity; the heat exchange assembly is located in the first receiving cavity, and the heat exchange assembly includes at least one heat exchange element for exchanging heat with the battery cell; at least one first side beam is provided with a receiving groove, and at least a portion of the at least one heat exchange element is received in the receiving groove.

[0009] In the battery of the embodiment of the present application, the battery cell and the heat exchange assembly are located in a first receiving cavity formed by multiple first side beams of the box body. The heat exchange element of the heat exchange assembly can exchange heat with the battery cell, thereby realizing heat exchange of the battery cell; and at least a portion of at least one heat exchange element is accommodated in the receiving groove of the first side beam, which can save the internal space of the box body, is conducive to improving the space utilization of the battery, improving the structural compactness of the battery, and thus improving the volume energy density of the battery.

[0010] In some embodiments, the surface of the first side beam facing the heat exchange element is recessed in a direction away from the heat exchange element to form a receiving groove.

[0011] By adopting the technical solution of this embodiment, the surface of the first side beam is recessed to form a receiving groove, so that the receiving groove has a groove bottom wall, so that the first side beam has good structural strength, thereby improving the structural strength of the battery; in addition, the receiving groove adopts a recessed manner, which is simple to manufacture and is also conducive to utilizing the internal space of the first side beam, saving the internal space of the battery, and improving the volume energy density of the battery.

[0012] In some embodiments, the receiving groove passes through the first side beam along the height direction of the first side beam; or, one end of the receiving groove along the height direction of the first side beam has a slot for inserting the heat exchange element into the receiving groove, and the other end of the receiving groove along the height direction of the first side beam is constructed with a support surface for supporting the heat exchange element.

[0013] By adopting the technical solution of this embodiment, the heat exchange element can be inserted into the receiving groove from the notch at one end of the receiving groove. The assembly operation of the heat exchange element and the first side beam is simple, which is conducive to improving the production efficiency of the battery.

[0014] In some embodiments, a surface of the first side beam facing the heat exchange element is configured with a reinforcing rib, and at least a portion of the receiving groove is disposed on the reinforcing rib.

[0015] By adopting the technical solution of this embodiment, the reinforcing ribs can increase the structural strength of the first side beam, thereby improving the structural strength of the box body, and further improving the structural strength and reliability of the battery.

[0016] In some embodiments, the depth of the receiving groove is t1, and the thickness of the first side beam is t2, wherein 0<t1 / t2≤2 / 3.

[0017] By adopting the technical solution of this embodiment and the design of 0<t1 / t2≤2 / 3, the depth of the receiving groove is not designed to be too large, so that the first side beam has good structural strength.

[0018] In some embodiments, 0.2≤t1 / t2≤0.5.

[0019] By adopting the technical solution of this embodiment, the design of 0.2≤t1 / t2≤0.5 allows the heat exchanger to be inserted into the first side beam to a certain depth, which is effective in saving the internal space of the battery. In addition, the groove depth of the receiving groove is reasonable, so that the first side beam can better take into account the space utilization inside the battery and the structural strength of the first side beam.

[0020] In some embodiments, the heat exchange component includes a current collector and a heat exchange body for exchanging heat with a battery cell; along a first direction, one end of the heat exchange body is connected to the current collector; a plurality of first heat exchange channels are provided in the heat exchange body, and the current collector is constructed with a connecting channel for connecting the plurality of first heat exchange channels; at least a portion of the current collector is accommodated in the receiving groove.

[0021] By adopting the technical solution of this embodiment, multiple first heat exchange channels are set in the heat exchange main body, which is beneficial to improving the heat exchange effect of the heat exchange component and improving the charging and discharging performance of the battery; in addition, the structure of the current collector is simple, and the receiving tank can also adopt a relatively simple structure, which is beneficial to simplifying the box structure. The operation of inserting the current collector into the receiving tank is simple, which is beneficial to reducing the production cost of the battery.

[0022] In some embodiments, the width of the receiving groove is L, and the thickness of the current collector is t3, wherein 1≤L / t3≤5.

[0023] By adopting the technical solution of this embodiment, the design of 1≤L / t3≤5 allows the current collector to be smoothly placed in the receiving groove, thereby achieving the purpose of saving space. At the same time, the first side beam can have good structural strength, so that the battery can take into account both the volume energy density and the reliability of use of the battery.

[0024] In some embodiments, 1.2≤L / t3≤2.

[0025] By adopting the technical solution of this embodiment, the design of 1.2≤L / t3≤2 allows the current collector to be inserted into the receiving groove more smoothly, thereby achieving the purpose of saving space. At the same time, it can also make the first side beam have better structural strength, so that the battery can better take into account the battery's volume energy density and reliability.

[0026] In some embodiments, the heat exchange assembly includes a connecting pipe and multiple heat exchange elements, and the multiple heat exchange elements are arranged along the second direction; along the first direction, a connecting pipe is connected between the ends of two adjacent heat exchange elements away from the collector, so that the two adjacent first heat exchange channels are connected, wherein the first direction and the second direction intersect.

[0027] By adopting the technical solution of this embodiment, the current collector and the connecting pipe are respectively located on opposite sides of the heat exchange component. The current collector and the connecting pipe are arranged separately, which can facilitate the insertion of the current collector into the receiving groove, and the assembly operation of the heat exchange component and the first side beam is simpler and more convenient.

[0028] In some embodiments, the surface with the largest area of ​​the battery cell is the first surface, and the first surface is used to abut against the heat exchange body.

[0029] By adopting the technical solution of this embodiment, the first surface is the surface with the largest area of ​​the battery cell, the first surface is offset against the heat exchange body, the area of ​​the battery cell and the heat exchange body is large, the heat exchange effect of the battery cell is good, the temperature control effect of the battery cell is good, and the charging and discharging effect of the battery is good. Under high-rate charging and discharging and high-temperature charging conditions, the temperature of the battery cell can be within a suitable operating range, thereby improving the reliability of the battery under high-rate charging and discharging and high-temperature charging conditions.

[0030] In some embodiments, there are multiple battery cells, and the multiple battery cells are divided into at least one column of battery cells. The battery cells in each column of battery cells are arranged along the first direction; at least one column of battery cells is provided between two adjacent heat exchange elements.

[0031] By adopting the technical solution of this embodiment, at least one column of battery cells is provided between two adjacent heat exchange elements, and the battery cells in each column of battery cells are arranged along the first direction. In this way, the battery cells in each column of battery cells can perform better heat exchange with the heat exchange body, and the heat exchange effect of the battery cells is good, which is beneficial to improving the charging and discharging performance of the battery.

[0032] In some embodiments, the surface with the largest area of ​​the battery cell is the first surface, and the first surface of at least one battery cell is disposed facing one of the first side beams.

[0033] By adopting the technical solution of this embodiment, when the first side beam arranged opposite to the first surface of the battery cell is hit, the first surface of the battery cell bears the impact. Compared with other surfaces, the first surface of the battery cell has a larger allowable deformation, and the risk of short circuit after the battery cell is squeezed and deformed will be relatively low, which can improve the reliability of the battery under side collision conditions.

[0034] In some embodiments, the surface of the battery cell with the largest area is the first surface, and the first surface of at least one battery cell adjacent to the first side beam abuts against the corresponding first side beam.

[0035] By adopting the technical solution of this embodiment, during the charging and discharging process, the battery cell expands the most on the first surface, and the first surface is offset against the first side beam. The first side beam can be used to limit the expansion of the first surface, thereby improving the charging and discharging performance of the battery cell, and further improving the charging and discharging performance of the battery.

[0036] In some embodiments, the first side beam abutting against the first surface of the battery cell is provided with a mounting structure for mounting the battery.

[0037] By adopting the technical solution of this embodiment, the first side beam provided with the mounting structure has good structural strength, so that the first side beam provided with the mounting structure can effectively limit the expansion and deformation of the battery cell, thereby eliminating the expansion beam and anti-expansion pull strip in the box body, thereby reducing the production cost of the box body and improving the volume energy density of the battery.

[0038] In some embodiments, the box body also includes a second side beam, and one of the multiple first side beams is a reinforcing beam; the first side beams other than the reinforcing beam are connected end to end with the second side beam and are surrounded to form a receiving space, and the reinforcing beam is located in the receiving space and divides the receiving space into a first receiving cavity and a second receiving cavity.

[0039] By adopting the technical solution of this embodiment, the provision of the reinforcing beam can increase the structural strength of the box body, which is beneficial to improving the reliability of the battery; the first receiving cavity is used to accommodate the battery cell, and the second receiving cavity can accommodate other components of the battery. The battery cell and other components can be separated by the reinforcing beam, which can reduce the risk of damage to the battery cell and short circuit caused by interference between other components and the battery cell, and is more conducive to improving the reliability of the battery; the box body adopts a structural form of a first side beam, a reinforcing beam and a second side beam, which has a simple structure and good structural reliability. The horizontal and vertical beams provided inside the box body can also be eliminated to provide more space for installing the battery cell, which is beneficial to improving the volume energy density of the battery.

[0040] In some embodiments, the reinforcement beam is configured with a receiving groove.

[0041] By adopting the technical solution of this embodiment, the receiving groove is arranged on the reinforcing beam inside the box body, and the first side beam of the box body facing the outside of the battery may not be provided with a receiving groove. The receiving groove is arranged on the reinforcing beam, which has little effect on the structural strength of the box body, so that the box body has good structural strength and the battery has good reliability.

[0042] In some embodiments, the battery further includes a control device for controlling the battery cell, and the control device is located in the second receiving cavity.

[0043] By adopting the technical solution of this embodiment, the control device is the second receiving cavity, and the battery cell and the control device are separated and isolated by the reinforcing beam, which can reduce the mutual influence between the battery cell and the control device and is conducive to improving the reliability of the battery.

[0044] In some embodiments, the box body further includes a sealing plate, which is located on one side of the first side beam and closes the opening on one side of the first receiving cavity.

[0045] By adopting the technical solution of this embodiment, the sealing plate seals the opening on one side of the first receiving cavity, which can reduce the impact of external components on the battery cell, which is beneficial to improving the reliability of the battery cell and the reliability of the battery.

[0046] In some embodiments, the sealing plate is a heat exchange plate for exchanging heat with the battery cells.

[0047] By adopting the technical solution of this embodiment, the sealing plate is a heat exchange plate, and the heat exchange plate can also exchange heat with the battery cell, so that the heat exchange component and the sealing plate can simultaneously exchange heat with the battery cell. The heat exchange area of ​​the battery cell is large, the heat exchange effect of the battery cell is good, and the battery charging and discharging performance is good.

[0048] In some embodiments, the box body further includes a box cover, which is located on the other side of the first side beam and closes the opening on the other side of the first receiving cavity.

[0049] By adopting the technical solution of this embodiment, the box cover and the sealing plate can seal the openings on the opposite sides of the first receiving cavity, thereby improving the sealing performance of the box body and facilitating the improvement of the reliability and service life of the battery.

[0050] In a second aspect, an electrical device is provided, comprising the battery as described in the above embodiment.

[0051] The electrical device of the embodiment of the present application adopts the above-mentioned battery, which has a high volume energy density, and is beneficial to improving the endurance performance and space utilization of the electrical device.

[0052] In some embodiments, the electrical device is a vehicle, the surface with the largest area of ​​the battery cell is the first surface, and the first surface is arranged facing a door of the vehicle.

[0053] By adopting the technical solution of this embodiment, the first surface is the surface with the largest area of ​​the battery cell. The first surface is arranged facing the vehicle door, so that when the vehicle is hit by a side pole or squeezed from the side, the first surface is subjected to deformation. Since the first surface allows much larger intrusion than other surfaces of the battery cell, the risk of short circuit after the battery cell is squeezed and deformed will be relatively low, which can greatly improve the safety of the battery in side pole collision and side squeezing conditions.

[0054] In some embodiments, the electrical device is a vehicle, the heat exchange assembly includes multiple heat exchange components and connecting pipes, the heat exchange components include a current collector and a heat exchange body for exchanging heat with a battery cell; along a first direction, one end of the heat exchange body is connected to the current collector; a plurality of first heat exchange channels are provided in the heat exchange body, and the current collector is constructed with a connecting channel for connecting the plurality of first heat exchange channels; the multiple heat exchange components are arranged along a second direction; along the first direction, a connecting pipe is connected between the ends of two adjacent heat exchange components away from the current collector so that the two adjacent first heat exchange channels are connected, and the first direction is parallel to the length direction of the vehicle; wherein the first direction and the second direction intersect.

[0055] By adopting the technical solution of this embodiment, the current collector and the connecting components are distributed along the length of the vehicle. In the event of a side pole collision or lateral extrusion of the vehicle, the risk of damage to the current collector and the connecting pipe fittings and the risk of leakage are small, thereby effectively reducing the risk of safety accidents and effectively improving the reliability of battery use.

[0056] 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

[0057] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following briefly introduces the drawings required for use in the embodiments or descriptions of the prior art. 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 any creative work.

[0058] FIG1 is a schematic structural diagram of a vehicle provided in some embodiments of the present application.

[0059] FIG2 is a schematic diagram of the exploded structure of a battery provided in some embodiments of the present application.

[0060] FIG3 is a schematic structural diagram of a battery cell provided in some embodiments of the present application.

[0061] FIG4 is a schematic structural diagram of the battery shown in FIG2 with the battery hidden behind the box cover.

[0062] FIG5 is a partial enlarged view of point A in FIG4 .

[0063] FIG6 is a schematic structural diagram of a first side beam provided in some embodiments of the present application.

[0064] FIG7 is a schematic structural diagram of a first side beam provided in some other embodiments of the present application.

[0065] FIG8 is a schematic structural diagram of a first side beam provided in some other embodiments of the present application.

[0066] FIG9 is a schematic structural diagram of a heat exchange assembly provided in some embodiments of the present application.

[0067] FIG10 is a partial enlarged view of point C in FIG9 .

[0068] FIG11 is a cross-sectional view along line BB in FIG4 .

[0069] FIG12 is a partial enlarged view of point D in FIG11 .

[0070] FIG13 is a partial enlarged view of point E in FIG11 .

[0071] FIG14 is a schematic diagram of an exploded view of batteries provided in other embodiments of the present application.

[0072] In the figures, the following reference numerals are used: 1000, vehicle; 1100, battery; 1200, controller; 1300, motor; 10, box; 11, box cover; 12, Lower box body; 121, first side beam; 1211, receiving groove; 1212, reinforcing rib; 1213, mounting structure; 1214, notch; 122, second side beam; 123, reinforcing beam; 124, sealing plate; 125, heat exchange plate; 1251, second heat exchange channel; 101, receiving space; 1011, first receiving cavity; 1012, second receiving cavity; 20, battery cell; 21, first surface; 22, first end face; 23, first side face; 24, second side face; 30, heat exchange assembly; 31, heat exchange part; 311, collector; 312, heat exchange main body; 3121, first heat exchange channel; 32, connecting pipe; 33, inflow pipe; 34, outflow pipe; 40, control device; 50, confluence component. DETAILED DESCRIPTION

[0073] In order to make the technical problems, technical solutions and beneficial effects to be solved by this application more clearly understood, this application is further described in detail below with reference to Figures 1 to 14 and embodiments. It should be understood that the specific embodiments described herein are only used to explain this application and are not intended to limit this application.

[0074] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the art 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" and any variations thereof in the specification and claims of this application and the above-mentioned figure descriptions are intended to cover non-exclusive inclusions.

[0075] In the description of the embodiments of this application, the technical terms "first," "second," etc., are used solely to distinguish between different objects and should not be understood to indicate or imply relative importance, or to implicitly specify the quantity, specific order, or primary-secondary relationship of the technical features indicated. Therefore, a feature designated "first" or "second" may explicitly or implicitly include one or more of such features.

[0076] References herein to "embodiments" mean that a particular feature, structure, or characteristic described in connection with the embodiments may be included in at least one embodiment of the present application. The appearance of this phrase in various places in the specification does not necessarily refer to the same embodiment, nor does it constitute an independent or alternative embodiment that is mutually exclusive of other embodiments. It is understood, both explicitly and implicitly, by those skilled in the art that the embodiments described herein may be combined with other embodiments in any suitable manner.

[0077] In the description of the embodiments of this application, the term "and / or" is simply a description of the association relationship between associated objects, indicating that three relationships can exist. For example, A and / or B can represent the following three situations: A exists alone, A and B exist simultaneously, and B exists alone. In addition, the character " / " in this document generally indicates that the associated objects are in an "or" relationship.

[0078] In the description of the embodiments of this application, the term "plurality" refers to two or more (including two). Similarly, "multiple groups" refers to two or more (including two groups), and "multiple sheets" refers to two or more (including two sheets). "Several" means one or more, unless otherwise specifically defined.

[0079] In the description of the embodiments of the present application, the technical terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the embodiments of the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation. Therefore, they should not be understood as limiting the embodiments of the present application.

[0080] In the description of the embodiments of the present application, unless otherwise expressly specified or limited, technical terms such as "installed," "connected," "connected," and "fixed" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integration; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; and internal connections between two components or interactions between two components. Those skilled in the art can understand the specific meanings of the above terms in the embodiments of the present application based on specific circumstances.

[0081] In the description of the embodiments of the present application, unless otherwise expressly specified or 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.

[0082] In this application, battery cells may include lithium-ion secondary batteries, lithium-ion primary batteries, lithium-sulfur batteries, sodium-lithium-ion batteries, sodium-ion batteries, lithium metal batteries, or magnesium-ion batteries, etc., and the embodiments of this application do not limit this. Battery cells may be cylindrical, flat, rectangular, or other shapes, etc., and the embodiments of this application do not limit this. Battery cells are generally divided into three types based on the packaging method: cylindrical battery cells, prismatic battery cells, and soft-pack battery cells, and the embodiments of this application do not limit this.

[0083] The battery referred to in the embodiments of this application refers to a single physical module that includes one or more battery cells to provide higher voltage and capacity. A battery generally includes a housing that encloses one or more battery cells. The housing can, to a certain extent, prevent liquids or other foreign matter from affecting the charging or discharging of the battery cells.

[0084] In a battery, when there are multiple battery cells, they can be connected in series, in parallel, or in a hybrid connection. A hybrid connection refers to a combination of series and parallel connections. Multiple battery cells can be directly connected in series, in parallel, or in a hybrid connection, and then the entire battery cell structure is housed within a housing. Alternatively, a battery can be constructed by first connecting multiple battery cells in series, in parallel, or in a hybrid connection to form a battery module, which is then connected in series, in parallel, or in a hybrid connection to form a single unit, which is then housed within a housing. The battery may also include other structures, such as a busbar assembly for electrically connecting multiple battery cells.

[0085] The battery cell 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.

[0086] The electrode assembly is also called a battery cell. 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 portion of the positive electrode collector not coated with the positive electrode active material layer protrudes from the portion coated with the positive electrode active material layer. The portion 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 current collector and a negative active material layer. The negative active material layer is applied to the surface of the negative current collector. The portion of the negative current collector not coated with the negative active material layer protrudes from the portion coated with the negative active material layer. This portion serves as the negative electrode tab, or a metal conductor is welded to the negative current collector and extended to serve as the negative electrode tab. The negative current collector can be made of copper, and the negative active material can be carbon, silicon, or other materials. To ensure that high currents can pass without melting, multiple positive electrode tabs are stacked together, and multiple negative electrode tabs are stacked together. It is understood that the electrode assembly can have one positive electrode tab and one negative electrode tab. In other words, the electrode assembly is provided with two sets of tabs, each containing at least one tab, with one set being the positive electrode tab and the other being the negative electrode tab.

[0087] 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 tabs to the collector, and then arrange them in the order of positive electrode sheet - diaphragm - negative electrode sheet - diaphragm; and then form a cylindrical or square battery cell by winding. The laminated structure is mostly to lead out the tabs on the 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 together 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.

[0088] The outer shell refers to the housing structure with a space inside to accommodate and protect the electrode assembly. The outer shell can be made of a material with a certain degree of hardness and strength. This prevents deformation during compression and collision, giving the battery cells greater structural strength and improved reliability. The outer shell can be made of a variety of materials, including but not limited to copper, iron, aluminum, stainless steel, aluminum alloy, and plastic.

[0089] The outer casing of a battery cell is equipped with electrode terminals. Electrode terminals are conductive components attached to the outer casing. They connect to the tabs of the electrode assembly to output power from the battery cell or charge the battery cell. A battery cell generally has two electrode terminals, one connected to the positive and negative tabs of the electrode assembly. The electrode terminal connected to the positive tab is the positive electrode terminal, and the electrode terminal connected to the negative tab is the negative electrode terminal. The electrode assembly and electrode terminals are connected to form a battery cell.

[0090] When a battery cell is charged, the current converts electrical energy into chemical energy through chemical reactions between the electrolyte and electrodes, which is stored in the cell. During discharge, the chemical energy is converted back into electrical energy and released. This energy conversion process is accompanied by energy loss and heat generation. If the heat cannot be effectively dissipated due to poor heat dissipation within the battery cell, the cell can overheat. Battery cells have a certain internal resistance, and when current flows through this resistance, it generates resistance losses, causing internal heat generation. When the current is too high or the internal resistance is too high, the internal heat generation intensifies, leading to overheating. If a battery cell exceeds its maximum design voltage during charging, or if the voltage drops too low during discharge, the cell can overvoltage or overdischarge. Overcharging or overdischarging can trigger runaway chemical reactions within the cell, generating excessive heat and causing overheating. Furthermore, defects in the battery cell design or manufacturing process, such as improper material selection or poor cell assembly, can lead to poor internal heat dissipation or uneven current distribution, increasing the risk of overheating or overvoltage. Therefore, the battery cells may overheat or overvoltage during charging or use.

[0091] Battery cells typically contain a certain amount of gas. When a battery cell is charged or discharged, the electrolyte solution undergoes gas generation or absorption reactions. The generation of these gases causes the gas pressure inside the battery cell to increase, causing the battery cell to swell and deform. During the charging or discharging process, the positive and negative electrode materials undergo chemical reactions to form new compounds. These chemical reactions are accompanied by volume changes, which cause the volume of the materials inside the battery cell to change, causing the battery to swell and deform. When a battery cell is overcharged or over-discharged, the chemical reactions inside the battery cell can become uncontrolled, generating excessive gas or causing structural damage to the electrode materials, which in turn causes the battery cell to swell and deform. Charging or discharging a battery cell in a high-temperature environment accelerates the internal chemical reactions, increasing gas generation and volume changes. High temperatures also cause the materials inside the battery cell to expand, also causing the battery cell to swell and deform.

[0092] To reduce the risk of explosion or fire caused by overheating or overpressure during charging or use, battery cell casings are often equipped with pressure relief mechanisms such as explosion-proof valves and explosion-proof discs. These release internal gas or liquid when the temperature or pressure of the battery cell exceeds a safety threshold, thereby reducing the internal pressure and the risk of explosion. This improves the safety performance of the battery cell and reduces potential safety risks.

[0093] In the related art, to improve the performance of electric vehicles, strict restrictions are placed on the volume of batteries. However, the maximum single-trip mileage of an electric vehicle is primarily determined by the battery's volumetric energy density, which refers to the average amount of energy released per unit volume. As the demand for electric vehicle range continues to increase, improving the battery's volumetric energy density remains an unresolved issue. Batteries typically consist of a single cell, a heat exchange assembly, and a housing. The battery is assembled with the cell and heat exchange assembly within the housing, but the internal structure is not compact, which contributes to the battery's low volumetric energy density.

[0094] Based on this, the battery of the embodiment of the present application has a first side beam of the battery box provided with a receiving groove, and at least a portion of the heat exchange component of the heat exchange assembly is received in the receiving groove, which can save the internal space of the battery, improve the space utilization inside the battery, improve the compactness of the internal structure of the battery, and improve the volume energy density of the battery.

[0095] The technical solutions described in the embodiments of the present application are applicable to batteries and electrical devices using batteries.

[0096] Electrical devices may be vehicles, mobile phones, portable devices, laptop computers, ships, spacecraft, electric toys, electric tools, and the like. Spacecraft include airplanes, rockets, space shuttles, and spacecraft, and the like; electric toys include fixed or mobile electric toys, such as game consoles, electric car toys, electric ship toys, and electric airplane toys, and the like; electric tools include metal cutting electric tools, grinding electric tools, assembly electric tools, and railway electric tools, such as electric drills, electric grinders, electric wrenches, electric screwdrivers, electric hammers, impact drills, concrete vibrators, and electric planers, and the like. The embodiments of the present application do not impose any special restrictions on the above-mentioned electrical devices. Batteries may also be energy storage devices. Energy storage devices include energy storage containers, energy storage cabinets, and the like.

[0097] For the convenience of description, the following embodiments are described by taking a vehicle as an example of an electrical device.

[0098] Please refer to FIG. 1 , which is a schematic structural diagram of a vehicle 1000 provided in some embodiments of the present application.

[0099] The vehicle 1000 may be a fuel vehicle, a gas vehicle or a new energy vehicle. 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. 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 serve as an operating power source for the vehicle 1000. The vehicle 1000 may further include a controller 1200 and a motor 1300. The controller 1200 is used to control the battery 1100 to power the motor 1300, for example, to meet the power requirements for starting, navigating and driving the vehicle 1000.

[0100] In some embodiments of the present application, the battery 1100 can serve not only as an operating power source for the vehicle 1000, but also 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.

[0101] In order to meet different power requirements, the battery 1100 may include a plurality of battery cells 20, wherein the plurality of battery cells 20 may be connected in series, in parallel, or in hybrid connection, where hybrid connection refers to a mixture of series and parallel connection. The battery 1100 may also be referred to as a battery pack. Optionally, the plurality of battery cells 20 may first be connected in series, in parallel, or in hybrid connection to form a battery module, and the plurality of battery modules may then be connected in series, in parallel, or in hybrid connection to form the battery 1100. In other words, the plurality of battery cells 20 may directly form the battery 1100, or they may first form a battery 1100 module, and the battery modules may then form the battery 1100.

[0102] The battery 1100 further includes a case 10 for encapsulating one or more battery cells 20. The case 10 can prevent liquid or other foreign matter from affecting the charging or discharging of the battery cells 20 to a certain extent.

[0103] Refer to Figure 2, which is a schematic diagram of the exploded structure of the battery 1100 provided in some embodiments of the present application. The battery 1100 has a height direction, a length direction, and a width direction. The height direction of the battery 1100 can refer to the Z direction, the width direction of the battery 1100 can refer to the X direction, and the length direction of the battery 1100 can refer to the Y direction. The length of the battery 1100 can be longer or shorter than the width. The box body 10 defines the external structure of the battery 1100. The height direction of the box body 10 is the height direction of the battery 1100, the length direction of the box body 10 is the length direction of the battery 1100, and the width direction of the box body 10 is the width direction of the battery 1100.

[0104] For ease of understanding and description, the embodiments provided in this application are described only with respect to rectangular battery cells. It should be understood that the embodiments provided in this application are also applicable to cylindrical battery cells or soft-pack battery cells, and the embodiments of this application are not limited to this.

[0105] Please refer to FIG. 3 , which is a schematic structural diagram of a battery cell 20 provided in some embodiments of the present application.

[0106] The battery cell 20 also has a height, a length, and a width. The height of the battery cell 20 can be referred to as the Z1 direction, the width of the battery cell 20 can be referred to as the X1 direction, and the length of the battery cell 20 can be referred to as the Y1 direction. The battery cell 20 includes two first end faces 22 along its height. The distance between the two first end faces 22 defines the height of the battery cell 20. The battery cell 20 includes two first side faces 23 along its thickness and two second side faces 24 along its length. The distance between the two first side faces 23 defines the width of the battery cell 20, and the distance between the two second side faces 24 defines the length of the battery cell 20. The area of ​​the two first end faces 22 is determined by the length and width of the battery cell 20, the area of ​​the first side face 23 is determined by the height and length of the battery cell 20, and the area of ​​the second side face 24 is determined by the height and width of the battery cell 20. For a flat battery cell 20, such as a square, its width is smaller than its length and height, and its first side face 23 has the largest area. Therefore, the first side face 23 is also called the large side.

[0107] Please refer to Figures 4 to 6. Figure 4 is a schematic diagram of the structure of the battery 1100 shown in Figure 2 hidden in the box cover 11. Figure 5 is a partial enlarged view of point A in Figure 4. Figure 6 is a schematic diagram of the structure of the first side beam 121 provided in some embodiments of the present application.

[0108] In some embodiments of the present application, a battery 1100 is provided, which includes a box body 10, a heat exchange assembly 30 and at least one battery cell 20, the box body 10 includes multiple first side beams 121, and the multiple first side beams 121 are connected and enclosed to form a first receiving cavity 1011; at least one battery cell 20 is located in the first receiving cavity 1011; the heat exchange assembly 30 is located in the first receiving cavity 1011, and the heat exchange assembly 30 includes at least one heat exchange component 31 for exchanging heat with the battery cell 20; at least one first side beam 121 is provided with a receiving groove 1211, and at least a portion of the at least one heat exchange component 31 is received in the receiving groove 1211.

[0109] The housing 10 may be a shell structure having a first receiving cavity 1011. The battery cells 20 and the heat exchange assembly 30 are received in the first receiving cavity 1011. The housing 10 protects the battery cells 20 and the heat exchange assembly 30. The housing 10 may have various structures.

[0110] As an example, the box body 10 may include a lower box body 12 and a box cover 11. The lower box body 12 and the box cover 11 cover each other, and the lower box body 12 and the box cover 11 jointly define a first receiving chamber 1011. The lower box body 12 may be a hollow structure with one end open, and the box cover 11 may be a plate-like structure. The box cover 11 covers the open side of the lower box body 12, so that the lower box body 12 and the box cover 11 jointly define the first receiving chamber 1011. The lower box body 12 and the box cover 11 may also be hollow structures with one end open, and the open side of the lower box body 12 covers the open side of the box cover 11. Of course, the box body 10 formed by the lower box body 12 and the box cover 11 can have various shapes, such as a cylinder, a rectangular parallelepiped, etc.

[0111] In some examples, the box body 10 includes a first side beam 121. Multiple first side beams 121 are connected and enclose the first receiving cavity 1011. That is, the multiple first side beams 121, when connected, can form the surrounding sidewalls of the first receiving cavity 1011. The first side beam 121 can be a sidewall on one side of the first receiving cavity 1011. When the lower box body 12 is a hollow structure with one end open and the box cover 11 is a plate-like structure, the sidewall on one side of the lower box body 12 forms the first side beam 121. When both the lower box body 12 and the box cover 11 are hollow structures with one end open, the sidewall of the lower box body 12 and the corresponding sidewall of the box cover 11 together form the first side beam 121. The first side beam 121 can be a profile structure, a sheet metal structure, a die-cast structure, etc.

[0112] The heat exchange assembly 30 may refer to a heat exchange component located in the first receiving chamber 1011. The heat exchange assembly 30 includes at least one heat exchange element 31, which may be a component that exchanges heat with the battery cells 20. The heat exchange assembly 30 may include one or more heat exchange elements 31. A first heat exchange channel 3121 may be provided within the heat exchange element 31, through which a heat exchange medium flows, thereby achieving heat exchange with the battery cells 20. When the temperature of the heat exchange medium is higher than that of the battery cells 20, the heat exchange element 31 heats the battery cells 20. When the temperature of the heat exchange medium is lower than that of the battery cells 20, the heat exchange element 31 cools the battery cells 20. This achieves temperature control of the battery cells 20, thereby facilitating better charge and discharge performance of the battery cells 20. The heat exchange element 31 may be a plate-like or tubular structure. The heat exchange medium may be, but is not limited to, water, air, coolant, etc.

[0113] At least one first side beam 121 is provided with a receiving groove 1211, and at least one heat exchange element 31 is at least partially accommodated in the receiving groove 1211; it can be understood that the number of first side beams 121 provided with receiving grooves 1211 can be one or more, and one first side beam 121 can be provided with one or more receiving grooves 1211; the receiving groove 1211 can refer to a groove structure for accommodating the heat exchange element 31, and one receiving groove 1211 can accommodate one or more heat exchange elements 31; the heat exchange element 31 can be partially located in the receiving groove 1211, or can be completely located in the receiving groove 1211.

[0114] As an example, as shown in conjunction with Figures 2 and 4 , there are four first side beams 121 , which are connected and enclose a first receiving cavity 1011 . Two of the first side beams 121 are located on opposite sides of the box body 10 along the width direction of the battery 1100 and extend along the length direction of the battery 1100 . The other two first side beams 121 are located on opposite sides of the box body 10 along the length direction of the battery 1100 and extend along the width direction of the battery 1100 . The first side beams 121 extending along the width direction of the battery 1100 are provided with multiple receiving grooves 1211 , and multiple heat exchange elements 31 can be inserted into each receiving groove 1211 one by one. Of course, in other examples, the first side beams 121 along the length direction of the battery 1100 may also be provided with one or more receiving grooves 1211 .

[0115] In the battery 1100 of the embodiment of the present application, the battery cell 20 and the heat exchange assembly 30 are located in a first receiving cavity 1011 formed by multiple first side beams 121 of the box body 10. The heat exchange element 31 of the heat exchange assembly 30 can exchange heat with the battery cell 20, thereby realizing heat exchange of the battery cell 20; and at least a portion of at least one heat exchange element 31 is accommodated in the receiving groove 1211 of the first side beam 121, which can save the internal space of the box body 10, is conducive to improving the space utilization of the battery 1100, improving the structural compactness of the battery 1100, and thus improving the volume energy density of the battery 1100.

[0116] In some embodiments, the battery 1100 further includes a busbar 50 , through which multiple battery cells 20 are connected in parallel, in series, or in mixed connection. The busbar 50 may be, but is not limited to, a conductive member such as a copper busbar or an aluminum busbar.

[0117] Please refer to Figure 7 or Figure 8 , which is a schematic diagram of the structure of the first side beam 121 provided in some other embodiments of the present application. Figure 8 is a schematic diagram of the structure of the first side beam 121 provided in some other embodiments of the present application.

[0118] The first side beam 121 shown in Figures 6, 7, and 8 has a height, a width, and a length. The height of the first side beam 121 is parallel to the height of the battery 1100, the width of the first side beam 121 is parallel to the length of the battery 1100, and the length of the first side beam 121 is parallel to the width of the battery 1100. The first side beam 121 is provided with a plurality of receiving slots 1211, which are arranged at intervals along the length of the first side beam 121 to facilitate assembly with the plurality of heat exchange elements 31.

[0119] In other embodiments of the present application, the surface of the first side beam 121 facing the heat exchange element 31 is recessed in a direction away from the heat exchange element 31 to form a receiving groove 1211 .

[0120] It is understood that the receiving groove 1211 may refer to a recessed structure on the surface of the first side beam 121 facing the heat exchanger 31. In one example, as shown in conjunction with FIG7 , when the first side beam 121 is a sheet metal structure, the receiving groove 1211 can be formed by extruding the surface of the sheet metal, simplifying the production of the first side beam 121. In another example, as shown in conjunction with FIG8 , when the first side beam 121 is a die-cast structure, a structure corresponding to the receiving groove 1211 can be provided in the die-casting mold. This ensures that the first side beam 121 produced by the die-casting process automatically has the receiving groove 1211, eliminating the need for subsequent processing and facilitating the production of the first side beam 121.

[0121] By adopting the technical solution of this embodiment, the surface of the first side beam 121 is recessed to form a receiving groove 1211, so that the receiving groove 1211 has a groove bottom wall, so that the first side beam 121 has good structural strength, thereby improving the structural strength of the battery 1100; in addition, the receiving groove 1211 adopts a recessed manner, which is simple to manufacture and is also conducive to utilizing the internal space of the first side beam 121, saving the internal space of the battery 1100, and improving the volume energy density of the battery 1100.

[0122] In one example, as shown in FIG. 6 , when the first side beam 121 is a profile structure, the receiving groove 1211 is manufactured by mechanically removing material, which has a simple manufacturing method and low manufacturing cost.

[0123] In other embodiments of the present application, as shown in Figure 6, the receiving groove 1211 penetrates the first side beam 121 along the height direction of the first side beam 121; or, the receiving groove 1211 has a notch 1214 at one end along the height direction of the first side beam 121 for inserting the heat exchange element 31 into the receiving groove 1211, and the other end of the receiving groove 1211 along the height direction of the first side beam 121 is constructed with a supporting surface for supporting the heat exchange element 31.

[0124] In one possible embodiment, the receiving groove 1211 penetrates the first side beam 121 along the height direction of the first side beam 121, and the first side beam 121 forms slots 1214 on both opposite end surfaces in the height direction of the first side beam 121. The two slots 1214 are respectively connected to the two ends of the receiving groove 1211 to facilitate the insertion of the heat exchange component 31 into the receiving groove 1211 from the slots 1214, thereby improving the convenience of assembling the heat exchange component 31 and the first side beam 121.

[0125] In another possible embodiment, the receiving groove 1211 has a slot 1214 at one end along the height direction of the first side beam 121 for inserting the heat exchange element 31 into the receiving groove 1211, and the receiving groove 1211 is constructed with a support surface for supporting the heat exchange element 31 at the other end along the height direction of the first side beam 121. The receiving groove 1211 extends from one end of the first side beam 121 to the other end of the first side beam 121 along the height direction of the first side beam 121, but does not penetrate the first side beam 121. The receiving groove 1211 forms a slot 1214 at one end of the first side beam 121 and forms a support surface at the other end, so that the heat exchange element 31 can be inserted into the receiving groove 1211 from the slot 1214 and supported on the support surface, so as to facilitate the assembly of the heat exchange element 31 and the first side beam 121; the receiving groove 1211 does not penetrate the first side beam 121, and the structural strength of the first side beam 121 is good, which is beneficial to improving the structural strength of the battery 1100.

[0126] By adopting the technical solution of this embodiment, the heat exchange element 31 can be inserted into the receiving groove 1211 from the notch 1214 at one end of the receiving groove 1211. The assembly operation of the heat exchange element 31 and the first side beam 121 is simple, which is conducive to improving the production efficiency of the battery 1100.

[0127] In other embodiments of the present application, as shown in FIG. 8 , a surface of the first side beam 121 facing the heat exchange element 31 is configured with a reinforcing rib 1212 , and at least a portion of the receiving groove 1211 is disposed on the reinforcing rib 1212 .

[0128] The reinforcing rib 1212 may refer to a protruding structure formed on the surface of the first side beam 121. The number of the reinforcing rib 1212 may be one or more, and the reinforcing rib 1212 may extend along the height direction of the first side beam 121 or along the length direction of the first side beam 121. When the reinforcing rib 1212 extends along the length direction of the first side beam 121, the plurality of reinforcing ribs 1212 may be arranged at intervals along the height direction of the first side beam 121; when the reinforcing rib 1212 extends along the height direction of the first side beam 121, the plurality of reinforcing ribs 1212 may be arranged at intervals along the length direction of the first side beam 121.

[0129] At least part of the receiving groove 1211 is arranged on the reinforcing rib 1212. It can be understood that the entire receiving groove 1211 is located on the reinforcing rib 1212, that is, the groove depth of the receiving groove 1211 is less than or equal to the protruding height of the reinforcing rib 1212 protruding from the first side beam 121; or, a part of the receiving groove 1211 is located on the reinforcing rib 1212, that is, the groove depth of the receiving groove 1211 is greater than the protruding height of the reinforcing rib 1212 protruding from the first side beam 121.

[0130] By adopting the technical solution of this embodiment, the reinforcing rib 1212 can increase the structural strength of the first side beam 121, thereby improving the structural strength of the box body 10, and further improving the structural strength and reliability of the battery 1100.

[0131] In other embodiments of the present application, as shown in FIG5 , the depth of the receiving groove 1211 is t1 , and the thickness of the first side beam 121 is t2 , wherein 0<t1 / t2≤2 / 3.

[0132] The depth of the receiving groove 1211 may refer to the distance between the plane where the opening of the receiving groove 1211 is located and the bottom surface of the receiving groove 1211. The thickness of the first side beam 121 may refer to the distance between two opposing surfaces of the first side beam 121 along the thickness direction. The depth direction of the receiving groove 1211 is parallel to the thickness direction of the first side beam 121.

[0133] 0<t1 / t2≤2 / 3. It can be understood that t1 / t2>0, the thickness of the first side beam 121 at the receiving groove 1211 is less than the thickness of the first side beam 121 at other positions, so that the receiving groove 1211 is formed on the first side beam 121; t1 / t2≤2 / 3, the receiving groove 1211 will not penetrate the first side beam 121, so that the first side beam 121 will not be disconnected, that is, the first side beam 121 has a solid structure at the receiving groove 1211, and the solid structure can connect the parts of the first side beam 121 located on opposite sides of the receiving groove 1211.

[0134] By adopting the technical solution of this embodiment and the design of 0<t1 / t2≤2 / 3, the groove depth of the receiving groove 1211 is not designed to be too large, so that the first side beam 121 has good structural strength.

[0135] In other embodiments of the present application, as shown in FIG5 , 0.2≤t1 / t2≤0.5.

[0136] t1 / t2≥0.2, the receiving groove 1211 has a certain depth, so that the receiving groove 1211 can accommodate the heat exchange component 31, thereby saving the internal space of the battery 1100; t1 / t2≤0.5, the depth of the receiving groove 1211 will not be too deep, so that the first side beam 121 has a certain structural strength, and the battery 1100 has good structural reliability.

[0137] By adopting the technical solution of this embodiment, the design of 0.2<t1 / t2≤0.5 allows the heat exchange component 31 to be inserted into the first side beam 121 to a certain depth, which is effective in saving the internal space of the battery 1100. In addition, the groove depth of the receiving groove 1211 is reasonable, so that the first side beam 121 can better take into account the space utilization inside the battery 1100 and the structural strength of the first side beam 121.

[0138] In some embodiments, the value of t1 / t2 may be, but is not limited to, 0.1, 0.15, 0.2, 0.25, 0.3, 0.35, 0.4, 0.45, 0.5, 0.55, 0.6, 0.65, or 2 / 3.

[0139] Please refer to Figures 9 to 14. Figure 9 is a schematic diagram of the structure of the heat exchange assembly 30 provided in some embodiments of the present application. Figure 10 is a partial enlarged view of point C in Figure 9. Figure 11 is a cross-sectional view along line BB in Figure 4. Figure 12 is a partial enlarged view of point D in Figure 11. Figure 13 is a partial enlarged view of point E in Figure 11. Figure 14 is a schematic diagram of an exploded view of a battery 1100 provided in other embodiments of the present application.

[0140] In other embodiments of the present application, as shown in Figures 9 and 10, the heat exchange element 31 includes a current collector 311 and a heat exchange body 312 for exchanging heat with the battery cell 20; along the first direction, one end of the heat exchange body 312 is connected to the current collector 311; a plurality of first heat exchange channels 3121 are provided in the heat exchange body 312, and the current collector 311 is constructed with a connecting channel for connecting the plurality of first heat exchange channels 3121; at least a portion of the current collector 311 is accommodated in the receiving groove 1211.

[0141] The heat exchange body 312 refers to the portion of the heat exchange element 31 that exchanges heat with the battery cells 20. The heat exchange body 312 can offset the battery cells 20 to achieve heat exchange. Multiple first heat exchange channels 3121 are provided within the heat exchange body 312. These first heat exchange channels 3121 are channels for the flow of heat exchange medium. The heat exchange body 312 can be provided with two, three, or more than four first heat exchange channels 3121.

[0142] The current collector 311 may be a component used to connect the multiple first heat exchange channels 3121 within the heat exchange body 312. The current collector 311 is provided with connecting channels, which connect the multiple first heat exchange channels 3121 in series, parallel, or mixed, allowing the heat exchange medium to flow through the multiple first heat exchange channels 3121. The current collector 311 may be a shell-like structure with connecting channels. The number of connecting channels within the current collector 311 may be one, two, or three or more, depending on the number of first heat exchange channels 3121.

[0143] The heat exchange body 312 is connected to the collector 311 at one end along the first direction. The first direction can refer to the length direction of the heat exchange body 312, and the first direction can also refer to the length direction of the battery 1100, that is, the length direction of the heat exchange body 312 is parallel to the length direction of the battery 1100. In this way, the heat exchange body 312 can be set longer, and the heat exchange area of ​​the heat exchange component 31 is large, which can meet the heat exchange needs of more battery cells 20.

[0144] At least part of the current collector 311 is received in the receiving groove 1211 . It is understandable that part of the current collector 311 is located in the receiving groove 1211 and another part is located outside the receiving groove 1211 , or the entire current collector 311 is located in the receiving groove 1211 .

[0145] By adopting the technical solution of this embodiment, multiple first heat exchange channels 3121 are set in the heat exchange main body 312, which is beneficial to improving the heat exchange effect of the heat exchange component 31 and improving the charging and discharging performance of the battery 1100; in addition, the structure of the current collector 311 is simple, and the receiving groove 1211 can also adopt a relatively simple structure, which is beneficial to simplifying the structure of the box body 10, and the operation of inserting the current collector 311 into the receiving groove 1211 is simple, which is beneficial to reducing the production cost of the battery 1100.

[0146] In other embodiments of the present application, as shown in FIG5 , the width of the receiving groove 1211 is L, and the thickness of the current collector 311 is t3, wherein 1≤L / t3≤5.

[0147] The width of the receiving groove 1211 may refer to the distance between two opposing groove walls of the receiving groove 1211, and the thickness of the current collector 311 may refer to the distance between two opposing side surfaces of the current collector 311 along the thickness direction. As shown in FIG5 , the thickness direction of the current collector 311 is parallel to the width direction of the receiving groove 1211, and the width direction and thickness direction of the current collector 311 are parallel to the width direction of the heat exchange body 312.

[0148] 1≤L / t3≤5. It can be understood that the design of L / t3≥1 makes the groove width of the receiving groove 1211 greater than or equal to the thickness of the current collector 311, and the current collector 311 can be placed in the receiving groove 1211, thereby achieving the purpose of saving the internal space of the battery 1100; the design of L / t3≤5 makes the groove width of the receiving groove 1211 not too large, so that the first side beam 121 has good structural strength.

[0149] By adopting the technical solution of this embodiment, the design of 1≤L / t3≤5 allows the current collector 311 to be smoothly placed in the receiving groove 1211, thereby achieving the purpose of saving space. At the same time, the first side beam 121 can have good structural strength, so that the battery 1100 can take into account both the volume energy density and the reliability of use of the battery 1100.

[0150] In other embodiments of the present application, as shown in FIG5 , 1.2≤L / t3≤2.

[0151] 1.2≤L / t3≤2. It can be understood that the design of L / t3≥1.2 makes the groove width of the receiving groove 1211 larger than the thickness of the current collector 311, and the current collector 311 can be more easily placed in the receiving groove 1211, thereby achieving the purpose of saving the internal space of the battery 1100; with the design of L / t3≤2, the groove width of the receiving groove 1211 is reasonably designed, and the first side beam 121 has good structural strength.

[0152] By adopting the technical solution of this embodiment, the design of 1.2≤L / t3≤2 allows the current collector 311 to be more smoothly inserted into the receiving groove 1211, thereby achieving the purpose of saving space. At the same time, the first side beam 121 can have better structural strength, so that the battery 1100 can better take into account the volume energy density and usage reliability of the battery 1100.

[0153] In some embodiments, the value of L / t3 can be, but is not limited to, 1, 1.2, 1.4, 1.6, 1.8, 2, 2.2, 2.4, 2.6, 2.8, 3, 3.2, 3.4, 3.6, 3.8, 4, 4.2, 4.4, 4.6, 4.8, 5.

[0154] In other embodiments of the present application, as shown in Figures 9 and 10, the heat exchange assembly 30 includes a connecting pipe 32 and a plurality of heat exchange elements 31, and the plurality of heat exchange elements 31 are arranged along the second direction; along the first direction, a connecting pipe 32 is connected between the ends of two adjacent heat exchange elements 31 away from the collector 311, so that the first heat exchange channels 3121 of the two adjacent heat exchange elements 31 are connected, wherein the first direction and the second direction intersect.

[0155] The connecting pipe 32 may be a pipe that connects the first heat exchange channels 3121 of two adjacent heat exchange bodies 312. The first heat exchange channels 3121 of two adjacent heat exchange components 31 can be connected in series or in parallel via the connecting pipe 32. Two adjacent heat exchange bodies 312 can be connected via one or more connecting pipes 32. For example, two adjacent heat exchange bodies 312 are provided with two connecting pipes 32. The heat exchange assembly 30 also includes an inlet pipe 33 and an outlet pipe 34. The inlet pipe 33 is used to introduce heat exchange medium from outside the battery 1100 into the first heat exchange channel 3121. After flowing through the first heat exchange channel 3121, the heat exchange medium then flows out of the battery 1100 through the outlet pipe 34, thereby achieving heat exchange within the battery cells 20.

[0156] The connecting pipe 32 and the current collector 311 are respectively connected to opposite ends of the heat exchange body 312 along a first direction. The first direction can refer to the distribution direction of the current collector 311 and the connecting pipe 32, or it can refer to the length direction of the heat exchange body 312. The multiple heat exchange elements 31 are arranged along a second direction, which can refer to the arrangement direction of the multiple heat exchange elements 31. The first direction and the second direction intersect. This arrangement allows the current collector 311 and the connecting pipe 32 to be located on opposite sides of the heat exchange assembly 30 along the first direction.

[0157] As an example, the second direction is perpendicular to the first direction. The second direction may refer to the width direction of the heat exchange body 312 or the width direction of the battery 1100 , that is, the width direction of the heat exchange body 312 is parallel to the width direction of the battery 1100 .

[0158] By adopting the technical solution of this embodiment, the current collector 311 and the connecting pipe 32 are respectively located on opposite sides of the heat exchange component 30. The current collector 311 and the connecting pipe 32 are arranged separately, which can facilitate the insertion of the current collector 311 into the receiving groove 1211. The assembly operation of the heat exchange component 30 and the first side beam 121 is simpler and more convenient.

[0159] In other embodiments of the present application, as shown in Figures 2, 3, 4, 11 and 12, the surface with the largest area of ​​the battery cell 20 is the first surface 21, and the first surface 21 is used to offset the heat exchange body 312.

[0160] The first surface 21 may refer to a surface of the battery cell 20 with the largest area.

[0161] The first surface 21 is used to abut against the heat exchange body 312. It can be understood that the first surface 21 is arranged to face the heat exchange body 312 and can abut against the heat exchange body 312, wherein the first surface 21 can directly abut against the heat exchange body 312, thereby realizing heat exchange between the battery cell 20 and the heat exchange body 312. The first surface 21 can also abut against the heat exchange body 312 through heat-conducting components such as heat-conducting glue and heat-conducting sheets to realize heat exchange between the battery cell 20 and the heat exchange body 312.

[0162] As an example, referring to Figures 2 and 3, the height direction of the battery cell 20 is parallel to the height direction of the battery 1100, the width direction of the battery cell 20 is parallel to the width direction of the battery 1100, and the length direction of the battery cell 20 is parallel to the length direction of the battery 1100. The first surface 21 of the battery cell 20 is the first side surface 23, and the first side surface 23 is offset against the heat exchange body 312 of the heat exchange assembly 30, that is, the large surface of the battery cell 20 is offset against the heat exchange body 312, which can realize large-surface heat exchange of the battery cell 20 and a large heat exchange area, which is beneficial to improving the heat exchange effect of the battery 1100, and thereby improving the charge and discharge performance of the battery 1100.

[0163] By adopting the technical solution of this embodiment, the first surface 21 is the surface with the largest area of ​​the battery cell 20. The first surface 21 offsets the heat exchange body 312. The area of ​​the battery cell 20 and the heat exchange body 312 is large, the heat exchange effect of the battery cell 20 is good, the temperature control effect of the battery cell 20 is good, and the charging and discharging effect of the battery 1100 is good. It can also make the temperature of the battery cell 20 of the battery 1100 be within the appropriate working range under high-rate charging and discharging and high-temperature charging conditions, so as to improve the reliability of the battery 1100 under high-rate charging and discharging and high-temperature charging conditions.

[0164] In other embodiments of the present application, as shown in Figures 2 and 14, there are multiple battery cells 20, and the multiple battery cells 20 are divided into at least one column of battery cells 20. The battery cells 20 in each column of battery cells 20 are arranged along a first direction; at least one column of battery cells 20 is provided between two adjacent heat exchange elements 31.

[0165] It can be understood that multiple heat exchange elements 31 are arranged at intervals along the second direction, and at least one column of battery cells 20 is located in the gap between two adjacent heat exchange elements 31; wherein, one or more columns of battery cells 20 can be set between two adjacent heat exchange elements 31; each column of battery cells 20 may include one or more battery cells 20, and when a column of battery cells 20 includes one battery cell 20, the battery cell 20 is located between two adjacent heat exchange elements 31, and the length direction of the battery cell 20 may be parallel to the first direction, so that the large surface of the battery cell 20 can exchange heat with the heat exchange body 312; when a column of battery cells 20 includes multiple battery cells 20, the multiple battery cells 20 are arranged along the first direction, so that the multiple battery cells 20 can all exchange heat with the heat exchange body 312, so as to improve the heat exchange effect of the battery cells 20.

[0166] As an example, referring to Figure 14, a row of battery cells 20 is provided between two adjacent heat exchange elements 31, and the two adjacent heat exchange elements 31 respectively exchange heat with the opposite sides of the battery cells 20, thereby realizing double-sided heat exchange of the battery cells 20, wherein the two first surfaces 21 of the battery cells 20 are respectively offset against the two heat exchange elements 31, thereby realizing double-large-surface heat exchange of the battery cells 20.

[0167] In another example, referring to Figures 2, 4, and 11, two rows of battery cells 20 are disposed between two adjacent heat exchange elements 31. The oppositely facing sides of the two rows of battery cells 20 exchange heat with the adjacent two heat exchange elements 31, respectively, achieving single-sided heat exchange of the battery cells 20. Specifically, the two oppositely facing large surfaces of the two rows of battery cells 20 exchange heat with the adjacent two heat exchange elements 31, respectively, achieving single-large-surface heat exchange of the battery cells 20. Of course, in other examples, three, four, or five or more rows of battery cells 20 may be disposed between two adjacent heat exchange elements 31.

[0168] By adopting the technical solution of this embodiment, at least one column of battery cells 20 is provided between two adjacent heat exchange components 31, and the battery cells 20 in each column of battery cells 20 are arranged along the first direction. In this way, the battery cells 20 in each column of battery cells 20 can perform better heat exchange with the heat exchange body 312, and the heat exchange effect of the battery cells 20 is good, which is beneficial to improving the charging and discharging performance of the battery 1100.

[0169] In other embodiments of the present application, as shown in FIG. 12 , the surface of the battery cell 20 with the largest area is the first surface 21 , and the first surface 21 of at least one battery cell 20 is disposed facing one of the first side beams 121 .

[0170] The first surface 21 of at least one battery cell 20 is arranged facing one of the first side beams 121. It can be understood that the first surface 21 of at least one battery cell 20 is arranged opposite to one of the first side beams 121; wherein, the first surfaces 21 of multiple battery cells 20 may be arranged facing one of the first side beams 121, or the first surface 21 of one battery cell 20 may be arranged facing one of the first side beams 121, or it may mean that the first surfaces 21 of multiple battery cells 20 are arranged facing different first side beams 121.

[0171] As an example, the first surface 21 of each battery cell 20 in each column of battery cells 20 is disposed facing the first side beam 121 extending along the first direction.

[0172] In some cases, when the battery cell 20 is deformed by impact, the first surface 21 of the battery cell 20 allows a larger deformation than other surfaces, and the risk of short circuit after the battery cell 20 is squeezed and deformed is relatively low.

[0173] By adopting the technical solution of this embodiment, when the first side beam 121 arranged opposite to the first surface 21 of the battery cell 20 is hit, the first surface 21 of the battery cell 20 bears the impact, and the risk of short circuit in the battery cell 20 is low, which is beneficial to improving the reliability of the battery 1100 under side collision conditions.

[0174] In some embodiments, when the battery 1100 is installed in the vehicle 1000, the first surfaces 21 of the battery cells 20 are positioned facing the vehicle door 1000. This can significantly improve the reliability of the battery 1100 in side-pillar collision and side-extrusion conditions. The first surfaces 21 of all or some of the battery cells 20 in a row of battery cells 20 may face the vehicle door 1000.

[0175] In other embodiments of the present application, the surface with the largest area of ​​the battery cell 20 is the first surface 21 , and the first surface 21 of at least one battery cell 20 adjacent to the first side beam 121 abuts against the corresponding first side beam 121 .

[0176] Among the battery cells 20 adjacent to the first side beam 121, the first surface 21 of at least one battery cell 20 is against the corresponding first side beam 121. It can be understood that among the multiple battery cells 20 adjacent to the first side beam 121, one or more battery cells 20 can be against the corresponding first side beam 121, wherein the first surface 21 against the first side beam 121 can mean that the first surface 21 can directly against the first side beam 121, or it can mean that the first surface 21 is against the first side beam 121 through components such as heat exchange components 31, insulating components, and buffer components.

[0177] As an example, the first surface 21 of each battery cell 20 in a column of battery cells 20 adjacent to the first side beam 121 extending along the first direction abuts against the first side beam 121 .

[0178] By adopting the technical solution of this embodiment, during the charging and discharging process of the battery cell 20, the battery cell 20 expands the most on the first surface 21, and the first surface 21 is offset against the first side beam 121. The first side beam 121 can be used to limit the expansion of the first surface 21 to improve the charging and discharging performance of the battery cell 20, and thereby improve the charging and discharging performance of the battery 1100.

[0179] In some other embodiments of the present application, the first side beam 121 abutting against the first surface 21 of the battery cell 20 is provided with a mounting structure 1213 for mounting the battery 1100 .

[0180] It is understood that the mounting structure 1213 may refer to a structure provided on the first side member 121 for securing the battery 1100 to the vehicle 1000. Generally, the first side member 121 provided with the mounting structure 1213 has greater structural strength than the other side members, thereby ensuring stable mounting of the battery 1100. For example, the mounting structure 1213 may be a mounting beam provided on the first side member 121. The mounting beam may be integrally formed with the first side member 121 or a separately formed component, connected to the first side member 121 via a connecting structure. The mounting beam may be provided with connecting holes, through which connecting components, such as bolts or screws, connect to the vehicle body or frame of the vehicle 1000 to secure the battery 1100. The mounting beam may be provided on the first side member 121 extending along the first direction, and the mounting beam may extend along the first direction. This arrangement effectively increases the structural strength of the first side member 121 provided with the mounting beam.

[0181] By adopting the technical solution of this embodiment, the first side beam 121 provided with the mounting structure 1213 has good structural strength, so that the first side beam 121 provided with the mounting structure 1213 can effectively limit the expansion and deformation of the battery cell 20, thereby eliminating the expansion beam and anti-expansion pull strip in the box body 10, thereby reducing the production cost of the box body 10 and improving the volume energy density of the battery 1100.

[0182] In other embodiments of the present application, in combination with Figures 2 and 4, the box body 10 also includes a second side beam 122, and one of the multiple first side beams 121 is a reinforcing beam 123; the first side beams 121 except the reinforcing beam 123 are connected end to end with the second side beam 122 and are surrounded to form a receiving space 101, and the reinforcing beam 123 is located in the receiving space 101 and divides the receiving space 101 into a first receiving cavity 1011 and a second receiving cavity 1012.

[0183] It can be understood that a first side beam 121 located on one side of the first receiving cavity 1011 is a reinforcing beam 123, wherein the two first side beams 121 connected to the reinforcing beam 123 protrude the reinforcing beam 123 away from the first receiving cavity 1011, and the side beam connected between the ends of the two first side beams 121 facing away from the first receiving cavity 1011 is the second side beam 122. The second side beam 122, the reinforcing beam 123 and the two first side beams 121 are jointly arranged to form the second receiving cavity 1012, and the first receiving cavity 1011 and the second receiving cavity 1012 are arranged side by side.

[0184] As an example, there are four first side beams 121 and one second side beam 122. One of the four first side beams 121 is a reinforcing beam 123. The other three first side beams 121 and the second side beams 122 are connected end to end and enclosed to form a rectangular frame structure. Two of the three first side beams 121 extend in a first direction, the other first side beam 121 extends in a second direction, and the second side beam 122 extends along the second side beam 122. The reinforcing beam 123 is located within the receiving space 101 enclosed by the rectangular frame structure. The reinforcing beam 123 extends in the second direction. Both ends of the reinforcing beam 123 are respectively connected to the first side beam 121 along the first direction, so as to divide the receiving space 101 into a first receiving cavity 1011 and a second receiving cavity 1012. Of course, in other examples, the first side beams 121 and the second side beams 122 can also be enclosed to form a frame structure of other shapes, which can be set according to the shape and arrangement of the battery cells 20.

[0185] By adopting the technical solution of this embodiment, the provision of the reinforcing beam 123 can increase the structural strength of the box body 10, which is beneficial to improving the reliability of the battery 1100; the first receiving cavity 1011 is used to accommodate the battery cell 20, and the second receiving cavity 1012 can accommodate other components of the battery 1100. The battery cell 20 and other components can be separated by the reinforcing beam 123, which can reduce the risk of damage to the battery cell 20 and short circuit caused by interference between other components and the battery cell 20, and is more beneficial to improving the reliability of the battery 1100; the box body 10 adopts the structural form of the first side beam 121, the reinforcing beam 123 and the second side beam 122, which has a simple structure and good structural reliability. The horizontal and vertical beams provided inside the first receiving cavity 1011 can also be cancelled to provide more space for installing the battery cell 20, which is beneficial to improving the volume energy density of the battery 1100.

[0186] In other embodiments of the present application, as shown in FIG. 4 and FIG. 5 , the reinforcing beam 123 is configured with a receiving groove 1211 .

[0187] It is understandable that the receiving groove 1211 is provided on the reinforcing beam 123 .

[0188] By adopting the technical solution of this embodiment, the receiving groove 1211 is arranged on the reinforcing beam 123 inside the box body 10, and the first side beam 121 of the box body 10 facing the outside of the battery 1100 may not be provided with the receiving groove 1211. The receiving groove 1211 is arranged on the reinforcing beam 123, which has little effect on the structural strength of the box body 10, so that the box body 10 has good structural strength and the battery 1100 has good reliability.

[0189] In other embodiments of the present application, the battery 1100 further includes a control device 40 for controlling the battery cell 20 , and the control device 40 is located in the second receiving cavity 1012 .

[0190] The control device 40 may refer to a component for controlling the charging and discharging of the battery cells 20 , wherein the control device 40 may be a battery management system (BMS).

[0191] By adopting the technical solution of this embodiment, the control device 40 is the second receiving cavity 1012, and the battery cell 20 and the control device 40 are separated and isolated by the reinforcing beam 123, which can reduce the mutual influence between the battery cell 20 and the control device 40, and is conducive to improving the reliability of the battery 1100.

[0192] In other embodiments of the present application, as shown in FIG. 2 , the box body 10 further includes a sealing plate 124 . The sealing plate 124 is located on one side of the first side beam 121 and closes an opening on one side of the first receiving cavity 1011 .

[0193] The sealing plate 124 may be a plate-shaped member that closes the opening on one side of the first receiving cavity 1011. The sealing plate 124 may close only the opening on one side of the first receiving cavity 1011, or may simultaneously close the openings on the same side of the first receiving cavity 1011 and the second receiving cavity 1012. The sealing plate 124 may be connected to the first side beam 121 by screwing, clamping, or bonding.

[0194] As an example, when the lower box body 12 is a hollow structure with one end open and the box cover 11 is a plate-like structure, the sealing plate 124 may be the box cover 11, or the sealing plate 124 may be a bottom plate in the box cover 11 arranged opposite to the lower box body 12; when the lower box body 12 and the box cover 11 are both hollow structures with one side open, the sealing plate 124 may be a bottom plate in the lower box body 12 arranged opposite to the box cover 11.

[0195] By adopting the technical solution of this embodiment, the sealing plate 124 seals the opening on one side of the first receiving cavity 1011, which can reduce the impact of external components on the battery cell 20, thereby improving the reliability of the battery cell 20 and the reliability of the battery 1100.

[0196] In other embodiments of the present application, as shown in FIG. 13 , the sealing plate 124 is a heat exchange plate 125 for exchanging heat with the battery cell 20 .

[0197] It is understood that the sealing plate 124 may refer to the heat exchange plate 125, which can exchange heat with the battery cells 20. The heat exchange plate 125 is provided with a second heat exchange channel 1251, through which the heat exchange medium flows, thereby achieving heat exchange between the battery cells 20. The heat exchange plate 125 can be a multi-layer plate structure, with the second heat exchange channel 1251 formed between the two layers of plates; the heat exchange plate 125 can also be a tube sheet structure.

[0198] When the temperature of the heat exchange medium in the second heat exchange channel 1251 of the heat exchange plate 125 is higher than that of the battery cell 20, the heat exchange plate 125 heats the battery cell 20. When the temperature of the heat exchange medium in the second heat exchange channel 1251 of the heat exchange plate 125 is lower than that of the battery cell 20, the heat exchange plate 125 cools the battery cell 20, thereby achieving heat exchange within the battery cell 20. In specific applications, the sealing plate 124 can be located at the bottom of the battery cell 20 to achieve bottom heat exchange within the battery cell 20, or at the top of the battery cell 20 to achieve top heat exchange within the battery 1100.

[0199] By adopting the technical solution of this embodiment, the sealing plate 124 is a heat exchange plate 125, and the heat exchange plate 125 can also exchange heat with the battery cell 20, so that the heat exchange component 30 and the sealing plate 124 can simultaneously exchange heat with the battery cell 20. The heat exchange area of ​​the battery cell 20 is large, the heat exchange effect of the battery cell 20 is good, and the charging and discharging performance of the battery 1100 is good.

[0200] In other embodiments of the present application, as shown in FIG. 2 , the box body 10 further includes a box cover 11 . The box cover 11 is located on the other side of the first side beam 121 and closes the opening on the other side of the first receiving cavity 1011 .

[0201] The sealing plate 124 and the box cover 11 are respectively located on opposite sides of the first side beam 121 and respectively seal the openings on opposite sides of the first receiving chamber 1011. The box cover 11 can seal only the opening of the first receiving chamber 1011 facing away from the sealing plate 124, or it can seal both the opening of the first receiving chamber 1011 facing away from the sealing plate 124 and the opening of the second receiving chamber 1012 facing away from the sealing plate 124. The box cover 11 can be a plate-shaped component or a hollow structure with one side open. The box cover 11 can also exchange heat with the battery cells 20. In this way, the box cover 11 and the sealing plate 124 can achieve simultaneous heat exchange between the top and bottom of the battery cells 20, thereby improving the heat exchange effect of the battery cells 20 and enhancing the charge and discharge performance of the battery cells 20.

[0202] By adopting the technical solution of this embodiment, the box cover 11 and the sealing plate 124 can close the openings on opposite sides of the first receiving cavity 1011, thereby improving the sealing performance of the box body 10 and facilitating the improvement of the reliability and service life of the battery 1100.

[0203] The present application is described below with reference to some specific embodiments.

[0204] Example 1

[0205] In this embodiment, in combination with Figures 1 to 6 and Figures 9 to 13, the battery 1100 includes a box body 10, a heat exchange assembly 30 and at least one battery cell 20, the box body 10 includes multiple first side beams 121, and the multiple first side beams 121 are connected and enclosed to form a first receiving cavity 1011; at least one battery cell 20 is located in the first receiving cavity 1011; the heat exchange assembly 30 is located in the first receiving cavity 1011, and the heat exchange assembly 30 includes at least one heat exchange component 31 for exchanging heat with the battery cell 20; at least one first side beam 121 is provided with a receiving groove 1211, and at least a portion of the at least one heat exchange component 31 is received in the receiving groove 1211.

[0206] In this embodiment, the box body 10 also includes a second side beam 122, and one of the multiple first side beams 121 is a reinforcing beam 123; the first side beams 121 other than the reinforcing beam 123 are connected end to end with the second side beam 122 and are surrounded to form a receiving space 101, and the reinforcing beam 123 is located in the receiving space 101 and divides the receiving space 101 into a first receiving cavity 1011 and a second receiving cavity 1012.

[0207] In this embodiment, the reinforcing beam 123 is configured with a receiving groove 1211 .

[0208] In this embodiment, the battery 1100 further includes a control device 40 for controlling the battery cell 20 . The control device 40 is located in the second receiving cavity 1012 .

[0209] In this embodiment, the box body 10 further includes a sealing plate 124, which is located on one side of the first side beam 121 and closes the opening on one side of the first receiving cavity 1011. The sealing plate 124 covers the openings of the first receiving cavity 1011 and the second receiving cavity 1012 on the same side.

[0210] In this embodiment, the sealing plate 124 is a heat exchange plate 125 for exchanging heat with the battery cells 20 .

[0211] In this embodiment, the box body 10 further includes a box cover 11, which is located on the other side of the first side beam 121 and closes the opening on the other side of the first receiving cavity 1011. The box cover 11 closes the opening of the first receiving cavity 1011 on the side facing away from the sealing plate 124 and the opening of the second receiving cavity 1012 on the side facing away from the sealing plate 124.

[0212] In this embodiment, the receiving groove 1211 passes through the first side beam 121 along the height direction of the first side beam 121 .

[0213] In this embodiment, the heat exchange component 31 includes a current collector 311 and a heat exchange body 312 for exchanging heat with the battery cell 20; along the first direction, one end of the heat exchange body 312 is connected to the current collector 311; a plurality of first heat exchange channels 3121 are provided in the heat exchange body 312, and the current collector 311 is constructed with a connecting channel for connecting the plurality of first heat exchange channels 3121; at least a portion of the current collector 311 is accommodated in the receiving groove 1211.

[0214] In this embodiment, the heat exchange assembly 30 includes a connecting pipe 32 and a plurality of heat exchange elements 31, and the plurality of heat exchange elements 31 are arranged along the second direction; along the first direction, a connecting pipe 32 is connected between the ends of two adjacent heat exchange elements 31 away from the collector 311, so that the two adjacent first heat exchange channels 3121 are connected, wherein the first direction and the second direction intersect.

[0215] In this embodiment, a battery cell 20 is disposed between two adjacent heat exchange bodies 312 . The largest surface of the battery cell 20 is the first surface 21 , which is used to abut against the heat exchange body 312 .

[0216] In this embodiment, there are multiple battery cells 20 , which are divided into at least one column of battery cells 20 . The battery cells 20 in each column of battery cells 20 are arranged along a first direction. At least one column of battery cells 20 is provided between two adjacent heat exchange elements 31 .

[0217] In this embodiment, the surface with the largest area of ​​the battery cell 20 is the first surface 21 , and the first surface 21 of at least one battery cell 20 is disposed facing one of the first side beams 121 .

[0218] In this embodiment, the surface with the largest area of ​​the battery cell 20 is the first surface 21 , and the first surface 21 of at least one battery cell 20 adjacent to the first side beam 121 abuts against the corresponding first side beam 121 .

[0219] In this embodiment, the first side beam 121 abutting against the first surface 21 of the battery cell 20 is provided with a mounting structure 1213 for mounting the battery 1100 .

[0220] In this embodiment, the battery 1100 has a height direction, a length direction, and a width direction. The height direction of the battery 1100 can be referred to as the Z direction, the width direction of the battery 1100 can be referred to as the X direction, and the length direction of the battery 1100 can be referred to as the Y direction. The first direction is parallel to the length direction of the battery 1100, and the second direction is parallel to the width direction of the battery 1100.

[0221] In this embodiment, the number of first side beams 121 is four, and the number of second side beams 122 is one. One of the four first side beams 121 is a reinforcing beam 123. The other three first side beams 121 and the second side beams 122 are connected end to end and are arranged to form a rectangular frame structure. Two of the three first side beams 121 extend along the first direction, the other first side beam 121 extends along the second direction, and the second side beam 122 extends along the second direction. The reinforcing beam 123 is located in the receiving space 101 formed by the rectangular frame structure. The reinforcing beam 123 extends along the second direction, and the two ends of the reinforcing beam 123 are respectively connected to the two first side beams 121 along the first direction to divide the receiving space 101 into a first receiving cavity 1011 and a second receiving cavity 1012.

[0222] In this embodiment, the height of the battery cell 20 is parallel to the height of the battery 1100, the width of the battery cell 20 is parallel to the width of the battery 1100, and the length of the battery cell 20 is parallel to the length of the battery 1100. The battery cell 20 includes two end surfaces along its height, and the height of the battery cell 20 is defined by the two first end surfaces 22. The battery cell 20 includes two first side surfaces 23 along its thickness and two second side surfaces 24 along its length. The width of the battery cell 20 is defined by the two first side surfaces 23, and the length of the battery cell 20 is defined by the two second side surfaces 24. The area of ​​the two first end surfaces 22 is defined by the length and width of the battery cell 20, the area of ​​the first side surfaces 23 is defined by the height and length of the battery cell 20, and the area of ​​the second side surfaces 24 is defined by the height and width of the battery cell 20. For a flat battery cell 20, such as a square one, its width is smaller than its length and height, and its first side surface 23 has the largest area. Therefore, the first side surface 23 is also called the large surface, that is, the first surface 21 of the battery cell 20 is the first side surface 23, and the first side surface 23 is offset against the heat exchange body 312 of the heat exchange component 30. In other words, the large surface of the battery cell 20 is offset against the heat exchange body 312, which can realize large-surface heat exchange of the battery cell 20 and a large heat exchange area, which is beneficial to improving the heat exchange effect of the battery 1100, and thereby improving the charge and discharge performance of the battery 1100.

[0223] In this embodiment, two rows of battery cells 20 are disposed between two adjacent heat exchange elements 31 . The sides of the two rows of battery cells 20 facing away from each other exchange heat with the two adjacent heat exchange elements 31 , respectively, thereby achieving single-sided heat exchange of the battery cells 20 .

[0224] In this embodiment, the first surfaces 21 of a row of battery cells 20 adjacent to the first side beams 121 extending along the first direction abut against the corresponding first side beams 121 to limit expansion and deformation of the battery cells 20 .

[0225] In this embodiment, a mounting structure 1213 is provided on the first side member 121 extending along the first direction. Mounting structure 1213 can be a mounting beam mounted on the first side member 121. This mounting beam extends along the first direction, effectively increasing the structural strength of the first side member 121. The mounting beam can be integrally formed with the first side member 121. The mounting beam can be provided with connection holes, through which connecting components, such as bolts and screws, connect to the vehicle body or frame of the vehicle 1000 to mount the battery 1100.

[0226] In this embodiment, the reinforcing beam 123 is a profile structure, and the reinforcing beam 123 is provided with a plurality of receiving grooves 1211 . The plurality of receiving grooves 1211 are provided in a one-to-one correspondence with the current collectors 311 of the plurality of heat exchange elements 31 .

[0227] Example 2

[0228] The difference between this embodiment and the first embodiment is that, as shown in FIG. 7 , the surface of the first side beam 121 facing the heat exchange element 31 is recessed in a direction away from the heat exchange element 31 to form a receiving groove 1211 .

[0229] In this embodiment, the first side beam 121 is a sheet metal structure.

[0230] Example 3

[0231] The difference between this embodiment and the second embodiment is that, as shown in FIG. 8 , a surface of the first side beam 121 facing the heat exchange element 31 is configured with a reinforcing rib 1212 , and at least a portion of the receiving groove 1211 is disposed on the reinforcing rib 1212 .

[0232] In this embodiment, the first side beam 121 is a die-cast structure.

[0233] Example 4

[0234] The difference between this embodiment and the first embodiment is that, as shown in FIG14 , a row of battery cells 20 is provided between two adjacent heat exchange elements 31 , and the two adjacent heat exchange elements 31 respectively exchange heat with the opposite sides of the battery cells 20 , thereby realizing double-sided heat exchange of the battery cells 20 , wherein the two first surfaces 21 of the battery cells 20 respectively abut against the two adjacent heat exchange elements 31 , thereby realizing double-large-surface heat exchange of the battery cells 20 .

[0235] In other embodiments of the present application, referring to FIG. 1 , an electrical device is provided, including the battery 1100 as described in the above embodiment.

[0236] The electrical device of the embodiment of the present application adopts the above-mentioned battery 1100. The battery 1100 has a high volume energy density, which is beneficial to improving the endurance performance and space utilization of the electrical device.

[0237] In other embodiments of the present application, referring to FIG. 1 , FIG. 2 and FIG. 3 , the electrical device is a vehicle 1000 , the surface with the largest area of ​​the battery cell 20 is the first surface 21 , and the first surface 21 is arranged facing the door of the vehicle 1000 .

[0238] Vehicle 1000 has a width direction and a length direction. The length direction of vehicle 1000 may refer to the distribution direction of the front and rear wheels of vehicle 1000, and the length direction of vehicle 1000 may refer to the direction indicated by arrow X2; the width direction of vehicle 1000 may refer to the distribution direction of the left and right wheels of vehicle 1000, and the width direction of vehicle 1000 may refer to the direction indicated by arrow Y2.

[0239] The doors of the vehicle 1000 may refer to doors of the vehicle 1000 used for passenger entry and exit, driving operations, etc. The doors of the vehicle 1000 are generally located at sides of the vehicle 1000 in a width direction.

[0240] By adopting the technical solution of this embodiment, the first surface 21 is the surface with the largest area of ​​the battery cell 20. The first surface 21 is arranged facing the door of the vehicle 1000, so that when the vehicle 1000 is hit by a side pole or squeezed from the side, the first surface 21 is subjected to deformation. Since the first surface 21 allows much larger intrusion than other surfaces of the battery cell 20, the risk of short circuit after the battery cell 20 is squeezed and deformed will be relatively low, which can greatly improve the safety of the battery 1100 in side pole collision and side squeezing conditions.

[0241] In other embodiments of the present application, referring to Figures 1, 2, 9 and 10, the electrical device is a vehicle 1000, the heat exchange assembly 30 includes a plurality of heat exchange components 31 and connecting pipes 32, the heat exchange component 31 includes a current collector 311 and a heat exchange body 312 for exchanging heat with the battery cell 20; along the first direction, one end of the heat exchange body 312 is connected to the current collector 311; a plurality of first heat exchange channels 3121 are provided in the heat exchange body 312, and the current collector 311 is constructed with a connecting channel for connecting the plurality of first heat exchange channels 3121; the plurality of heat exchange components 31 are arranged along the second direction; along the first direction, a connecting pipe 32 is connected between the ends of two adjacent heat exchange components 31 away from the current collector 311, so that the two adjacent first heat exchange channels 3121 are connected, and the first direction is parallel to the length direction of the vehicle 1000; wherein the first direction and the second direction intersect.

[0242] It can be understood that the current collector 311 and the connecting assembly are respectively located on opposite sides of the heat exchange body 312 along the length direction of the vehicle 1000; as an example, the current collector 311 is located near the head of the vehicle 1000, and the connecting pipe 32 is located near the rear of the vehicle 1000; or, the current collector 311 is located near the rear of the vehicle 1000, and the connecting pipe 32 is located near the head of the vehicle 1000.

[0243] By adopting the technical solution of this embodiment, the current collector 311 and the connecting assembly are distributed along the length direction of the vehicle 1000. In the event that the vehicle 1000 is hit by a side pole or squeezed laterally, the risk of damage to the current collector 311 and the connecting pipe 32 and the risk of leakage are small, thereby effectively reducing the risk of safety accidents and effectively improving the reliability of the battery 1100.

[0244] In some embodiments, the first direction is perpendicular to the second direction, the first direction is parallel to the length direction of the vehicle 1000, and the second direction is parallel to the width direction of the vehicle 1000. The multiple battery cells 20 are divided into multiple columns of battery cells 20, and the multiple columns of battery cells 20 are distributed along the second direction. The multiple battery cells 20 in each column of battery cells 20 are arranged along the first direction, that is, the multiple battery cells 20 are arranged in a matrix along the length direction and the width direction of the vehicle 1000; the multiple heat exchange elements 31 in the heat exchange assembly 30 are arranged at intervals along the second direction, and one or two columns of battery cells 20 are provided between two adjacent heat exchange elements 31, and the current collector 311 and the connecting pipe 32 are respectively located on opposite sides of the heat exchange assembly 30 along the first direction; the large surface of the battery cell 20 abuts against the heat exchange body 312 to realize large-surface heat exchange of the battery cell 20, so that the battery cell 20 has a higher heat exchange effect. The current collector 311 is embedded in the receiving groove 1211 of the reinforcing beam 123 of the box body 10 , thereby saving the internal space of the battery 1100 and improving the volume energy density of the battery 1100 .

[0245] The above description of the various embodiments tends to emphasize the differences between the various embodiments. The same or similar aspects can be referenced with each other and will not be repeated herein for the sake of brevity.

[0246] 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 make equivalent replacements for some or all of the technical features therein. These modifications or replacements do not deviate the essence of the corresponding technical solutions 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, Comprising: A box body, including a plurality of first side beams, wherein the plurality of first side beams are connected and enclose to form a first receiving cavity; At least one battery cell, located in the first receiving cavity; And A heat exchange assembly, located in the first receiving cavity, the heat exchange assembly including at least one heat exchange element for exchanging heat with the battery cell; At least one of the first side beams is provided with a receiving groove, and at least a part of at least one of the heat exchange elements is received in the receiving groove.

2. The battery according to claim 1, wherein: The surface of the first side beam facing the heat exchange element is recessed in a direction away from the heat exchange element to form the receiving groove.

3. The battery according to claim 1 or 2, characterized in that: The receiving groove penetrates the first side beam along the height direction of the first side beam; Alternatively, one end of the receiving groove along the height direction of the first side beam has a notch for inserting the heat exchange element into the receiving groove, and the other end of the receiving groove along the height direction of the first side beam is configured with a support surface for supporting the heat exchange element.

4. The battery according to any one of claims 1 to 3, characterized in that: The surface of the first side beam facing the heat exchange element is configured with reinforcing ribs, and at least a part of the receiving groove is disposed on the reinforcing ribs.

5. The battery according to any one of claims 1 to 4, characterized in that: The depth of the receiving groove is t1, and the thickness of the first side beam is t2, wherein 0 < t1 / t2 ≤ 2 / 3.

6. The battery according to claim 5, wherein: 0.2 ≤ t1 / t2 ≤ 0.

5.

7. The battery according to any one of claims 1 to 6, characterized in that: The heat exchange element includes a current collector and a heat exchange main body for exchanging heat with the battery cell; along a first direction, one end of the heat exchange main body is connected to the current collector; a plurality of first heat exchange channels are provided in the heat exchange main body, and the current collector is configured with a communication channel for communicating the plurality of first heat exchange channels; at least a part of the current collector is received in the receiving groove.

8. The battery according to claim 7, wherein: The width of the receiving groove is L, and the thickness of the current collector is t3, wherein 1 ≤ L / t3 ≤ 5.

9. The battery according to claim 8, characterized in that: 1.2 ≤ L / t3 ≤ 2.

10. The battery according to any one of claims 7 to 9, characterized in that: The heat exchange assembly includes connecting pipe fittings and a plurality of the heat exchange elements, and the plurality of heat exchange elements are arranged along a second direction; along the first direction, the connecting pipe fittings are connected between the ends of adjacent two heat exchange elements away from the current collector to enable the adjacent two first heat exchange channels to communicate, wherein the first direction and the second direction intersect.

11. The battery according to claim 10, characterized in that: The number of the battery cells is multiple, and the multiple battery cells are divided into at least one column of battery cells, and the battery cells in each column of battery cells are arranged along the first direction; at least one column of battery cells is provided between adjacent two heat exchange elements.

12. The battery according to any one of claims 7 to 11, characterized in that: The largest surface area of the battery cell is the first surface, and the first surface is used to abut against the heat exchange main body.

13. The battery according to any one of claims 1 to 12, characterized in that: The largest surface area of the battery cell is the first surface, and the first surface of at least one of the battery cells faces one of the first side beams.

14. The battery according to any one of claims 1 to 13, characterized in that: The largest surface area of the battery cell is the first surface, and the first surface of at least one of the battery cells adjacent to the first side beam abuts against the corresponding first side beam.

15. The battery according to claim 14, characterized in that: The first side beam abutting against the first surface of the battery cell is provided with a mounting structure for realizing the mounting of the battery.

16. The battery according to any one of claims 1 to 15, characterized in that: The box body further includes a second side beam, and one of the plurality of first side beams is a strengthening beam; the first side beams other than the strengthening beam are connected end to end with the second side beam and enclose a receiving space, and the strengthening beam is located in the receiving space and divides the receiving space into a first receiving cavity and a second receiving cavity.

17. The battery according to claim 16, characterized in that: The strengthening beam is configured with the receiving groove.

18. The battery according to claim 16 or 17, characterized in that: The battery further includes a control device for controlling the battery cells, and the control device is located in the second receiving cavity.

19. The battery according to any one of claims 1 to 18, characterized in that: The box body further includes a sealing plate, the sealing plate is located on one side of the first side beam and closes an opening on one side of the first receiving cavity.

20. The battery according to claim 19, wherein: The sealing plate is a heat exchange plate for exchanging heat with the battery cells.

21. The battery according to claim 19 or 20, characterized in that: The box body further includes a box cover, the box cover is located on the other side of the first side beam and closes an opening on the other side of the first receiving cavity.

22. An electrical device, characterized in that: Including the battery according to any one of claims 1 to 21.

23. The electrical device according to claim 22, characterized in that: The electrical device is a vehicle, the largest surface area of the battery cell is the first surface, and the first surface faces the vehicle door.

24. The electrical device according to claim 22 or 23, characterized in that: The electrical device is a vehicle, the heat exchange assembly includes a plurality of heat exchange elements and connecting pipe fittings, the heat exchange element includes a current collector and a heat exchange main body for exchanging heat with the battery cell; along a first direction, one end of the heat exchange main body is connected to the current collector; a plurality of first heat exchange channels are provided in the heat exchange main body, and the current collector is configured with a communication channel for communicating the plurality of first heat exchange channels; the plurality of heat exchange elements are arranged along a second direction; along the first direction, the connecting pipe fittings are connected between the ends of two adjacent heat exchange elements away from the current collector, so that two adjacent first heat exchange channels are communicated, and the first direction is parallel to the length direction of the vehicle; wherein, the first direction and the second direction intersect.

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