Battery case, battery, and electric device

Abstract

A battery (1000) case (100), a battery (1000), and an electric device (2000). The case (100) comprises: a case body (10), the case body (10) defining an accommodating cavity (101) and a heat dissipation channel (102), the accommodating cavity (101) being used for accommodating battery cells (200) of the battery (1000), and a cavity wall of the accommodating cavity (101) being provided with a heat dissipation inlet (103) of the heat dissipation channel (102); and a first guide member (21), wherein the first guide member (21) defines a first guide channel (211), and two ends of the first guide member (21) are respectively in sealing fit with the battery cells (200) and the cavity wall of the accommodating cavity (101), such that the first guide channel (211) is communicated with a first pressure relief portion (210) and the heat dissipation inlet (103) of the battery cells (200).

Description

Battery box, battery and electrical device

[0001] CROSS-REFERENCE TO RELATED APPLICATIONS

[0002] This application claims priority to Chinese patent application No. "202310779913.7" filed by Contemporary Amperex Technology Co., Ltd. (Shanghai) and Contemporary Amperex Technology Co., Ltd. on June 28, 2023. The entire contents of the above Chinese patent application are hereby incorporated into this application by reference. Technical Field

[0003] The present application relates to the field of battery technology, and in particular to a battery box, a battery, and an electrical device. Background Art

[0004] When a battery experiences thermal runaway, it releases a large amount of ejecta. In related technologies, this ejecta can easily cause a high-voltage short circuit and ignition, raising the internal temperature of the battery and triggering a chain reaction of thermal runaway.

[0005] Summary of the Invention

[0006] The embodiments of the present application provide a battery casing that can reduce the impact of ejected matter from a battery cell on other surrounding battery cells and reduce the risk of thermal runaway.

[0007] In a first aspect, an embodiment of the present application provides a battery box, comprising: a box body, the box body defining a accommodating cavity and a heat dissipation channel, the accommodating cavity being used to accommodate a battery cell of the battery, the cavity wall of the accommodating cavity being provided with a heat dissipation inlet of the heat dissipation channel; a first guide member, the first guide member defining a first guide channel, the two ends of the first guide member being respectively used to seal with the battery cell and the cavity wall of the accommodating cavity, so that the first guide channel connects to the first pressure relief portion of the battery cell and the heat dissipation inlet.

[0008] In the above technical solution, a heat dissipation channel is provided and the first pressure relief portion of the battery cell and the heat dissipation inlet of the heat dissipation channel are connected through the first guide channel of the first guide member, so that high-temperature emissions emitted when thermal runaway occurs in the battery cell can be separated from the battery cell and the high-voltage circuit in a timely manner, and the temperature of the emissions can be reduced, thereby reducing the risk of thermal runaway caused by increased temperature of the surrounding battery units and the high-voltage circuit.

[0009] In some embodiments, the first guide member is an elastic member and is positioned between the battery cell and the wall of the accommodating cavity.

[0010] In the above technical solution, the elastic member can closely cooperate with the battery cell and the cavity wall of the accommodating cavity to improve the sealing effect.

[0011] In some embodiments, there are multiple first guide channels and multiple heat dissipation inlets, and the multiple first guide channels are connected to the first pressure relief portion and the heat dissipation inlet in a one-to-one correspondence.

[0012] In the above technical solution, when a single battery cell experiences thermal runaway, the high-temperature emissions of the battery cell can be discharged into the heat dissipation channel through the corresponding first guide channel and the heat dissipation inlet, so as to further reduce the impact on the surrounding battery cells and further reduce the risk of thermal runaway of the surrounding battery cells.

[0013] In some embodiments, the heat dissipation channel includes a first channel and a second channel, and the box body includes: a side frame, the side frame is provided with the first channel; a partition plate, the periphery of the partition plate is connected to the side frame to cooperate to define the accommodating cavity, and the partition plate is provided with the heat dissipation inlet; a first cover plate, the second channel is defined between the first cover plate and the partition plate, and the second channel and the accommodating cavity are respectively located on both sides of the partition plate.

[0014] In the above technical solution, the high-temperature emissions discharged from the battery cells can directly enter the second channel through the heat dissipation inlet on the partition plate, so that the emissions can be separated from the battery cells in the accommodating cavity in a timely manner by the partition plate, reducing the impact of the high temperature of the emissions on the battery cells.

[0015] In some embodiments, the periphery of the partition plate is sandwiched between the first cover plate and the side frame, and the periphery of the partition plate is provided with a communication port connecting the second channel and the first channel.

[0016] In the above technical solution, the exhaust in the second channel on one side of the partition plate can flow through the connecting port into the first channel on the other side, and the partition plate is unlikely to interfere with the flow of the exhaust in the heat dissipation channel.

[0017] In some embodiments, a second guide member is provided between the periphery of the partition plate and the side frame, and the second guide member defines a second guide channel. The two ends of the second guide member are respectively sealed with the partition plate and the side frame to connect the second guide channel to the connecting port and the first channel.

[0018] In the above technical solution, the second guide channel of the second guide member can limit the flow path of the emissions, so that the emissions flowing out of the connecting port are not easily leaked into the accommodating cavity between the partition plate and the side frame, thereby reducing interference with the battery cells and high-voltage circuits in the accommodating cavity.

[0019] In some embodiments, the first channel includes multiple layers of sub-channels stacked in a direction away from the accommodating cavity, wherein the sub-channel closest to the accommodating cavity is connected to the second channel, and the remaining sub-channels are connected to the second channel or through the sub-channel closest to the accommodating cavity.

[0020] In the above technical solution, multiple sub-channels are connected to the second channel, allowing exhaust from the second channel to enter each of the multiple sub-channels. This increases the exhaust flow path, and the partition structure between the two layers of sub-channels separates the high-temperature exhaust from the remaining sub-channels from the storage cavity, further reducing the impact on the battery cells and high-voltage circuits within the storage cavity. Alternatively, exhaust from the second channel first enters the sub-channel closest to the storage cavity before flowing into the remaining sub-channels. This results in a longer flow path for exhaust within the first channel, which helps reduce the temperature of exhaust discharged from the heat dissipation channel.

[0021] In some embodiments, two adjacent sub-channels are connected through a plurality of first through holes, and the plurality of first through holes are spaced apart and arranged along the surrounding direction of the side frame.

[0022] In the above technical solution, two adjacent sub-channels are connected by multiple first through holes. On the one hand, the opening area on the partition structure between the two layers of sub-channels can be reduced to improve the structural strength; on the other hand, the emissions in one sub-channel can flow more evenly along the length direction of the sub-channel and flow from multiple locations to another sub-channel, thereby improving the flow efficiency of the emissions between the two sub-channels, increasing the flow path of the emissions, and improving the cooling effect.

[0023] In some embodiments, the same sub-channel includes multiple layers of sub-chambers stacked in a direction away from the partition plate, and two adjacent sub-chambers are connected by multiple second through holes, and the multiple second through holes are spaced apart in the surrounding direction of the side frame.

[0024] In the above technical solution, at least part of the area between two adjacent layers of sub-chambers is separated by a partition structure and connected by multiple second through holes. On the one hand, the partition structure can be used to improve the structural strength of the side frame. On the other hand, the emissions in one sub-chamber can flow more evenly along the length direction of the sub-chamber and flow from multiple locations to another sub-chamber, thereby improving the flow efficiency of the emissions between the two sub-chambers and increasing the flow path of the emissions in the sub-channel to improve the cooling effect.

[0025] In some embodiments, a plurality of flow guides are provided in the second channel, the plurality of flow guides are arranged at intervals along the first direction, and the flow guides extend along the second direction, the inlet of the first channel is provided at the end of the first channel along the second direction, the outlet of the first channel is provided at the end of the first channel along the second direction or the end of the first channel along the first direction, and the first direction intersects with the second direction.

[0026] In the above technical solution, the portion of the second channel located between two adjacent guide members can form a guide channel, and the exhaust can flow along the guide channel in the second direction to flow to the inlet of the first channel as quickly as possible and enter the first channel more quickly, which is conducive to improving heat dissipation efficiency.

[0027] In some embodiments, the plurality of flow guides include a first flow guide opposite to the battery cell, at least one of the first flow guides includes a first flow guide portion, two adjacent first flow guide portions along the first direction correspond to the same battery cell and are respectively located on both sides of the heat dissipation inlet, and the first flow guide portion is against the partition plate.

[0028] In the above technical solution, exhaust entering the second channel from the heat dissipation inlet can enter between two adjacent first guides. The abutment between the first guides and the partition plates can restrict the flow direction of the exhaust, allowing the exhaust to flow along the first guides in the second direction, thereby flowing more quickly to the first channel, thereby improving heat dissipation efficiency. Furthermore, the abutment between the first guides and the partition plates can support the partition plates, improving their stability and, in turn, their support for the battery cells.

[0029] In some embodiments, at least one of the guide members includes a second guide portion, the second guide portion adjacent to the first guide portion along the second direction is located on both sides of the heat dissipation inlet and corresponds to the battery cell, and the second guide portion abuts against the partition plate.

[0030] In the above technical solution, the second guide portion can support the partition plate from both sides of the heat dissipation inlet along the second direction, thereby further improving the stability of the partition plate and further improving the supporting stability of the partition plate on the battery cells.

[0031] In some embodiments, the flow guide member further includes a third flow guide portion, and the third flow guide portion and the second flow guide portion in the same flow guide member are arranged along the second direction and connected, and the protruding height of the third flow guide portion is smaller than that of the second flow guide portion.

[0032] In the above technical solution, a certain gap can be formed between the third guide part and the partition plate. When there is too much discharge between two adjacent first guide parts, the discharge can not only flow directly along the second direction, but also pass through the third guide part and flow along the second direction with the help of adjacent guide parts, so as to improve the discharge efficiency and heat dissipation efficiency.

[0033] In some embodiments, the plurality of flow guides include a second flow guide opposite to the electrical connection structure of the battery, and the second flow guide is spaced apart from the partition plate.

[0034] In the above technical solution, a guide channel can be formed between two adjacent second guide members or between a second guide member and an adjacent first guide member, which can also be used to guide and dissipate heat of emissions, or to dissipate heat generated by the operation of the electrical connection structure, thereby improving the heat dissipation effect.

[0035] In some embodiments, the partition plate is a heat insulation plate, and the first cover plate is a heat dissipation plate.

[0036] In the above technical solution, the heat shield can reduce the heat transfer from the high-temperature exhaust in the second channel to the storage chamber, thereby reducing the impact on the battery cells and high-voltage circuit in the storage chamber. The heat sink can increase the heat dissipation of the high-temperature exhaust in the second channel to the outside of the box, thereby reducing the heat dissipation efficiency.

[0037] In some embodiments, at least a portion of the heat dissipation channel is provided with an adsorption material layer.

[0038] In the above technical solution, by setting up an adsorption material layer, harmful substances such as smoke in the emissions can be adsorbed to reduce or avoid the harmful substances being discharged from the heat dissipation outlet of the heat dissipation channel and affecting the health of surrounding people, thereby improving the smokeless emission effect.

[0039] In some embodiments, a one-way valve is provided at the heat dissipation inlet, and the one-way valve is unidirectionally conducted in a direction from the accommodating cavity to the heat dissipation channel.

[0040] In the above technical solution, by setting a one-way valve, the emissions discharged from the first pressure relief part can only flow into the heat dissipation channel from the heat dissipation inlet, while the emissions in the heat dissipation channel cannot flow back to the battery cell from the heat dissipation inlet, which can further improve the heat dissipation effect and reduce the impact of high-temperature emissions on the battery cell and the high-voltage circuit.

[0041] In some embodiments, a second pressure relief portion is provided at the outlet of the heat dissipation channel.

[0042] In the above technical solution, the second pressure relief portion is provided to facilitate the smooth discharge of emissions from the heat dissipation channel, and the heat dissipation outlet of the heat dissipation channel is closed when there is no thermal runaway.

[0043] In some embodiments, the box body includes two first side beams opposite to each other along a first direction and two second side beams opposite to each other along a second direction, the first side beams are the rear cross beams of the front frame or the front cross beams of the rear frame, the second side beams are the door sill beams, and the first direction intersects with the second direction.

[0044] In the above technical solution, the number of components is reduced, and the available space in the housing for installing battery cells and the heat dissipation channel for heat dissipation is increased, thereby improving space utilization, thereby increasing the battery's capacity and heat dissipation effect, and is beneficial to improving the energy of the entire vehicle.

[0045] In some embodiments, the box body further includes a second cover plate, the periphery of which is connected to the box body to cover the top opening of the accommodating cavity, and the second cover plate is a front floor.

[0046] In the above technical solution, the front floor is used as the second cover, which can not only achieve battery sealing, but also reduce the number of components, thereby improving the space utilization in the height direction, thereby increasing the battery capacity, and is beneficial to the improvement of the energy of the entire vehicle.

[0047] In a second aspect, an embodiment of the present application further provides a battery, comprising a battery cell and a box body of the battery according to an embodiment of the first aspect of the present application, wherein the battery cell is disposed in the box body.

[0048] In a third aspect, an embodiment of the present application further provides an electrical device, comprising the above-mentioned battery, wherein the battery is used to provide electrical energy to the electrical device. BRIEF DESCRIPTION OF THE DRAWINGS

[0049] FIG1 is a bottom view of a battery provided in some embodiments of the present application;

[0050] FIG2 is a partial structural diagram of FIG1 , in which the first cover plate and the partition plate are not shown;

[0051] FIG3 is an exploded view of a portion of the structure of FIG1 ;

[0052] FIG4 is an enlarged structural diagram of the circle B in FIG3 ;

[0053] FIG5 is a cross-sectional view taken along line AA of FIG1;

[0054] FIG6 is an enlarged structural diagram of the circle C in FIG5 ;

[0055] FIG7 is a left side view of a battery provided in some embodiments of the present application;

[0056] FIG8 is a cross-sectional view taken along line DD in FIG7 ;

[0057] FIG9 is a cross-sectional view taken along line EE in FIG8 ;

[0058] FIG10 is a schematic diagram of the enlarged structure of the circle H in FIG9;

[0059] FIG11 is a cross-sectional view taken along line FF in FIG8 ;

[0060] FIG12 is a schematic diagram of the enlarged structure of the circle J in FIG11;

[0061] FIG13 is a cross-sectional view taken along line GG in FIG8;

[0062] FIG14 is a top view of a first cover plate provided in some embodiments of the present application;

[0063] FIG15 is a schematic structural diagram of a first cover plate provided in some embodiments of the present application;

[0064] FIG16 is an enlarged structural diagram of the circle K in FIG15 ;

[0065] FIG17 is a schematic structural diagram of a side frame provided in some embodiments of the present application;

[0066] FIG18 is a schematic diagram of the structure of an electrical device provided in some embodiments of the present application.

[0067] Reference Signs: Electric device 2000; Battery 1000; Box 100; Battery cell 200; First pressure relief portion 210; Electrical connection portion 220; Front frame 300; Rear frame 400; Box body 10; Accommodation chamber 101; Heat dissipation channel 102; Heat dissipation inlet 103; First channel 104; Second channel 105; Sub-channel 106; Sub-chamber 108; Second through-hole 109; Side frame 11; First side beam 111; Second side beam 112; Partition plate 12; Communication port 121; First cover plate 13; Second cover plate 14; First guide member 21; First guide channel 211; Second guide member 22; Second guide channel 221; Flow guide member 30; First flow guide member 31; First flow guide portion 311; Second flow guide portion 312; Third flow guide portion 313; Second flow guide member 32; One-way valve 40; Second pressure relief portion 50; First direction F1; second direction F2; third direction F3. DETAILED DESCRIPTION

[0068] To make the purpose, technical solutions, and advantages of the embodiments of this application more clear, the technical solutions in the embodiments of this application will be clearly described below in conjunction with the drawings in the embodiments of this application. Obviously, the described embodiments are part of the embodiments of this application, not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

[0069] Unless otherwise defined, all technical and scientific terms used in this application have the same meanings as commonly understood by those skilled in the art to which this application belongs. The terms used in the specification of this application are for the purpose of describing specific embodiments only 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 drawings are intended to cover non-exclusive inclusions. The terms "first" and "second" in the specification and claims of this application or the above-mentioned drawings are used to distinguish different objects, rather than to describe a specific order or a primary-secondary relationship.

[0070] References to "embodiments" in this application mean that a particular feature, structure, or characteristic described in connection with the embodiment may be included in at least one embodiment of the 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.

[0071] In the description of this application, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," "connected," and "attached" should be understood in a broad sense. For example, they may refer to fixed connections, detachable connections, or integral connections; they may refer to direct connections, indirect connections through an intermediate medium, or internal connections between two components. Those skilled in the art will understand the specific meanings of the above terms in this application based on specific circumstances.

[0072] The term "and / or" in this application simply describes an association between related objects, indicating that three possible relationships exist. For example, A and / or B can represent: A exists alone, A and B exist simultaneously, and B exists alone. In addition, the character " / " in this application generally indicates that the related objects are in an "or" relationship.

[0073] In the embodiments of this application, the same reference numerals represent the same components, and for the sake of brevity, detailed descriptions of the same components in different embodiments are omitted. It should be understood that the thickness, length, width, and other dimensions of the various components in the embodiments of this application, as well as the overall thickness, length, width, and other dimensions of the integrated device shown in the drawings are merely illustrative and should not constitute any limitation on this application.

[0074] The term "plurality" used in this application refers to two or more (including two).

[0075] In this application, a battery refers to a single physical module that includes one or more battery cells to provide higher voltage and capacity. For example, the battery referred to in this application may include a battery module or battery pack. Some batteries may include a casing for enclosing one or more battery cells or multiple battery modules. The casing prevents liquids or other foreign matter from affecting the charging or discharging of the battery cells. Of course, some battery casings refer to the battery installation compartment of an electrical device.

[0076] 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, 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.

[0077] For example, a battery cell may include a housing, an electrode assembly, and an electrolyte, wherein the housing is used to contain the electrode assembly and the electrolyte. The electrode assembly is composed of a positive electrode sheet, a negative electrode sheet, and a separator. The battery cell 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 positive electrode collector not coated with the positive electrode active material layer protrudes from the positive electrode collector coated with the positive electrode active material layer, and the positive electrode collector not coated with the positive electrode active material layer serves 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.

[0078] The negative electrode sheet consists of a negative current collector and a negative active material layer. The negative active material layer is coated on the surface of the negative current collector. The negative current collector uncoated with the negative active material layer protrudes from the negative current collector coated with the negative active material layer. The negative current collector uncoated with the negative active material layer serves 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.

[0079] The material of the isolation film may be PP (polypropylene) or PE (polyethylene), etc. In addition, the electrode assembly may be a wound structure or a laminated structure, but the embodiments of the present application are not limited thereto.

[0080] The battery cells can be provided with terminals, etc., connected to the tabs, as the electrical connections of the battery cells. Furthermore, the battery cells can have a first pressure relief device. When the internal pressure of the battery cell is excessive (e.g., thermal runaway), the first pressure relief device is used to release substances (e.g., gas, liquid, particulate matter, etc.) inside the battery cell to reduce the internal pressure of the battery cell and prevent the internal pressure of the battery cell from being too rapidly increased, which could lead to dangerous accidents such as battery cell explosion. For example, the first pressure relief device can be an explosion-proof valve, explosion-proof disk, etc.

[0081] For example, when a battery experiences thermal runaway, it will release a large amount of high-temperature flammable solid ejecta and smoke. Some related technologies do not have sufficient thermal insulation protection, exhaust space and external exhaust devices. The solid ejecta may cause a high-voltage short circuit and ignition. The temperature inside the battery will rise rapidly, and a large amount of heat will be transferred to the surrounding battery cells. When the temperature exceeds the threshold, it will trigger thermal runaway of the surrounding battery cells, causing a chain reaction and leading to battery cell fire.

[0082] In some related technologies, the direction of solid ejecta and smoke is not fixed, and there is no separate isolation and sufficient heat dissipation channels. The large amount of heat generated by thermal runaway cannot be discharged in a timely and effective manner. The battery cells cannot be physically separated from the solid ejecta and smoke, which can easily cause secondary damage to the battery cells and affect other battery cells and high-voltage circuits.

[0083] Based on this, the present application proposes a case 100 for a battery 1000, which includes a case body 10 and a first guide member 21. The case body 10 defines a housing 101 and a heat dissipation channel 102. The housing 101 is used to accommodate a battery cell 200 of the battery 1000. The cavity wall of the housing 101 is provided with a heat dissipation inlet 103 of the heat dissipation channel 102. The first guide member 21 defines a first guide channel 211. The two ends of the first guide member 21 are respectively used to seal with the battery cell 200 and the cavity wall of the housing cavity 101, so that the first guide channel 211 connects the first pressure relief portion 210 of the battery cell 200 and the heat dissipation inlet 103.

[0084] In the case 100 of the battery 1000 of the above-mentioned structure, by providing a heat dissipation channel 102 and connecting the first pressure relief portion 210 of the battery cell 200 and the heat dissipation inlet 103 of the heat dissipation channel 102 through the first guide channel 211 of the first guide member 21, high-temperature emissions emitted when thermal runaway occurs in the battery cell 200 can be promptly separated from the battery cell 200 and the high-voltage circuit, and the temperature of the emissions can be reduced, thereby reducing the risk of thermal runaway caused by increased temperature of the surrounding battery 1000 units and the high-voltage circuit.

[0085] The battery 1000 disclosed in the embodiment of the present application can be used for, but not limited to, an electrical device 2000 such as a vehicle, ship or aircraft. The power supply system of the electrical device 2000 composed of the battery 1000 disclosed in the present application can be used to reduce the risk of thermal runaway of the electrical device 2000.

[0086] For example, the power-consuming device 2000 disclosed in the embodiments of the present application may be, but is not limited to, a vehicle, a mobile phone, a tablet, a laptop computer, a ship, a spacecraft, an electric toy, an electric tool, etc. A vehicle may be a fuel vehicle, a gas vehicle, a new energy vehicle, or a rail vehicle, and a new energy vehicle may be a pure electric vehicle, a hybrid vehicle, or an extended-range vehicle, etc.; a spacecraft includes an airplane, a rocket, a space shuttle, and a spacecraft, etc.; an electric toy includes a fixed or mobile electric toy, such as a game console, an electric vehicle toy, an electric ship toy, and an electric airplane toy, etc.; an electric tool includes a metal cutting electric tool, a grinding electric tool, an assembly electric tool, and a railway electric tool, such as an electric drill, an electric grinder, an electric wrench, an electric screwdriver, an electric hammer, an impact drill, a concrete vibrator, and an electric planer, etc.

[0087] Hereinafter, with reference to the accompanying drawings, a case 100 of a battery 1000 according to an embodiment of the present application will be described.

[0088] Please refer to Figures 1-6. Figure 1 is a bottom view of a battery 1000 provided in some embodiments of the present application; Figure 2 is a schematic diagram of a portion of the structure of Figure 1, wherein the first cover plate 13 and the partition plate 12 are not shown; Figure 3 is an exploded view of the portion of Figure 1; Figure 4 is an enlarged schematic diagram of the structure indicated by circle B in Figure 3; Figure 5 is a cross-sectional view of Figure 1 along line AA; and Figure 6 is an enlarged schematic diagram of the structure indicated by circle C in Figure 5. The housing 100 of the battery 1000 includes a housing body 10 and a first guide member 21.

[0089] Specifically, the box body 10 defines a housing chamber 101 and a heat dissipation channel 102. The housing chamber 101 is used to accommodate the battery cells 200 of the battery 1000. The wall of the housing chamber 101 is provided with a heat dissipation inlet 103 of the heat dissipation channel 102. The first guide member 21 defines a first guide channel 211. The two ends of the first guide member 21 are respectively configured to seal with the battery cells 200 and the wall of the housing chamber 101, so that the first guide channel 211 connects the first pressure relief portion 210 of the battery cells 200 and the heat dissipation inlet 103.

[0090] The box body 10 is used to provide a storage space for the battery cells 200 and can adopt a variety of structures. In some embodiments, the box body 10 can be a hollow structure with an opening on one side, or the box body 10 can include a hollow structure with an opening on one side and a cover plate covering the opening, with the cover plate being a plate-shaped structure or also a hollow structure with an opening on one side. The hollow structure can be a single piece formed integrally or a spliced ​​piece composed of at least one of a plate body, a beam, or other structures. The box body 10 can have a variety of shapes, such as a cylinder, a rectangular parallelepiped, etc.

[0091] The accommodating cavity 101 may be an integrated complete cavity, or may include a plurality of sub-cavities separated by partitions.

[0092] The heat dissipation channel 102 can be a channel extending along a straight line, a curve or a broken line; a channel extending in a mesh or tree shape; it can also include a chamber space, etc., as long as it can allow solid ejecta and flue gas and other emissions entering the heat dissipation channel 102 to flow from the heat dissipation inlet 103 of the heat dissipation channel 102 to the heat dissipation outlet.

[0093] There can be one or more battery cells 200, wherein multiple battery cells 200 can be connected in series, in parallel, or in a hybrid connection. A hybrid connection refers to a combination of series and parallel connections among multiple battery cells 200. Multiple battery cells 200 can be directly connected in series, in parallel, or in a hybrid connection, and then the entire battery cell 200 can be accommodated within the accommodating cavity 101. Of course, multiple battery cells 200 can also be connected in series, in parallel, or in a hybrid connection to form a module, and then the modules can be connected in series, in parallel, or in a hybrid connection to form an entire module, which can then be accommodated within the accommodating cavity 101. Other structures can also be provided within the accommodating cavity 101, such as an electrical connection structure formed by a busbar assembly, to achieve electrical connection between the multiple battery cells 200.

[0094] The cavity wall of the accommodating cavity 101 is provided with a heat dissipation inlet 103 of the heat dissipation channel 102 . In other words, the heat dissipation inlet 103 of the heat dissipation channel 102 is in communication with the accommodating cavity 101 .

[0095] The first guide member 21 defines a first guide channel 211. One first guide member 21 can define one first guide channel 211, that is, the first guide member 21 is generally formed into an annular or cylindrical structure; one first guide member 21 can also define multiple first guide channels 211, and the first guide member 21 is generally formed into a honeycomb structure. The cross-sectional shape of the first guide channel 211 perpendicular to the center line includes but is not limited to a circle, an ellipse, a square, a triangle, a polygon, an irregular shape, etc. The center line of the first guide channel 211 extends from the first pressure relief portion 210 to the heat dissipation inlet 103, and can extend along any path such as a straight line, a curve, or a broken line.

[0096] It should be noted that in an embodiment where there are multiple battery cells 200, the number of first guide channels 211 can be equal to the number of first pressure relief portions 210, or can be less than the number of first pressure relief portions 210. Each first guide channel 211 can cooperate with one first pressure relief portion 210, or can cooperate with multiple first pressure relief portions 210 so that the emissions from these multiple first pressure relief portions 210 can all be guided through the same first guide channel 211. Alternatively, a portion of the first pressure relief portions 210 cooperates with the first guide channel 211 and another portion of the first pressure relief portions 210 is connected to the accommodating cavity 101 to discharge the emissions into the accommodating cavity 101, and then discharged from the accommodating cavity 101 to the heat dissipation channel 102 or other areas.

[0097] The two ends of the first guide member 21 are respectively used to seal with the battery cell 200 and the cavity wall of the accommodating cavity 101, so that the first guide channel 211 connects the first pressure relief portion 210 of the battery cell 200 and the heat dissipation inlet 103. The sealing method includes but is not limited to adhesive sealing, abutment sealing, etc.

[0098] In other words, when thermal runaway occurs in the battery cell 200 corresponding to the first guide member 21, the emissions emitted can only enter the first guide channel 211 of the first guide member 21, flow along the first guide channel 211 to the heat dissipation inlet 103, and then enter the heat dissipation channel 102 from the heat dissipation inlet 103. This allows the emissions to be directed through the heat dissipation channel 102 to a specific area, which can be outside or within the housing 100. This effectively blocks the emissions and restricts their flow direction, allowing for more timely and efficient discharge. Due to the sealed fit between the first guide member 21 and the battery cell 200, the emissions are unlikely to enter the accommodating cavity 101 through the gap between the first guide member 21 and the battery cell 200. Consequently, the high temperature of the emissions is unlikely to affect other battery cells 200, isolating the emissions from other battery cells 200, preventing secondary damage to the battery cells 200 and reducing the risk of thermal runaway in other battery cells 200 and the high-voltage circuit. Furthermore, when the high-temperature exhaust gas flows through the heat dissipation channel 102 , the temperature of the exhaust gas can be reduced, thereby reducing the temperature of the exhaust gas discharged to a specific area.

[0099] According to the case 100 of the battery 1000 in the embodiment of the present application, by providing a heat dissipation channel 102 and connecting the first pressure relief portion 210 of the battery cell 200 and the heat dissipation inlet 103 of the heat dissipation channel 102 through the first guide channel 211 of the first guide member 21, high-temperature emissions emitted when thermal runaway occurs in the battery cell 200 can be separated from the battery cell 200 and the high-voltage circuit in a timely manner, and the temperature of the emissions can be reduced, thereby reducing the risk of thermal runaway caused by increased temperature of the surrounding battery 1000 units and the high-voltage circuit.

[0100] In some embodiments, referring to FIG. 3 to FIG. 6 , the first guide member 21 is an elastic member, and the elastic member abuts between the battery cell 200 and the cavity wall of the accommodating cavity 101 .

[0101] An elastic part refers to a part made of a material that can deform when subjected to an external force and can at least partially restore its original shape after the external force is removed, including but not limited to parts made of rubber, latex and other materials.

[0102] The above-mentioned characteristics of the elastic member enable it to stop between the battery cell 200 and the cavity wall of the accommodating chamber 101. Therefore, one end surface of the elastic member (for example, the upper end surface shown in FIG6 ) can fit tightly with the battery cell 200 to improve the sealing effect. The emissions discharged from the first pressure relief portion 210 are not easily leaked from between the elastic member and the battery cell 200. In addition, the other end surface of the elastic member (for example, the lower end surface shown in FIG6 ) can fit tightly with the cavity wall of the accommodating chamber 101 to improve the sealing effect. The emissions in the first guide channel 211 are not easily leaked from between the elastic member and the cavity wall of the accommodating chamber 101.

[0103] In some embodiments of the present application, referring to Figures 3-6 , there are multiple first guide channels 211 and multiple heat dissipation inlets 103 , and the multiple first guide channels 211 connect the first pressure relief portions 210 and the heat dissipation inlets 103 in a one-to-one correspondence. In other words, each first pressure relief portion 210 connects to a heat dissipation inlet 103 via a first guide channel 211 .

[0104] Therefore, when a single battery cell 200 experiences thermal runaway, the high-temperature emissions of the battery cell 200 can be discharged into the heat dissipation channel 102 through the corresponding first guide channel 211 and the heat dissipation inlet 103, so as to further reduce the impact on the surrounding battery cells 200 and further reduce the risk of thermal runaway of the surrounding battery cells 200.

[0105] It should be noted that the multiple heat dissipation inlets 103 may be connected to the same heat dissipation channel 102 , or may be connected to multiple heat dissipation channels 102 .

[0106] The specific structure of the box body 10 according to some embodiments of the present application is described below with reference to the accompanying drawings.

[0107] 3 to 6 , the heat dissipation channel 102 includes a first channel 104 and a second channel 105 . The box body 10 includes a side frame 11 , a partition plate 12 and a first cover plate 13 .

[0108] The side panel 11 is provided with a first channel 104. The periphery of the partition panel 12 is connected to the side panel 11 to define a receiving cavity 101. The partition panel 12 is provided with a heat dissipation inlet 103. A second channel 105 is defined between the first cover panel 13 and the partition panel 12. The second channel 105 and the receiving cavity 101 are located on either side of the partition panel 12.

[0109] The side frame 11 is a closed frame structure with both ends open along the centerline. For example, it can be a circular frame, a square frame, a polygonal frame, etc. The side frame 11 can be a single piece or can be formed by connecting multiple structural members end to end. For example, in embodiments where the side frame 11 is a square frame or a polygonal frame, the structural members can include but are not limited to plates, beams, and other structures.

[0110] The partition plate 12 refers to a plate body that can physically separate the accommodating cavity 101 from the second channel 105. The plate body can be a flat plate or a non-flat plate with concave-convex structures such as grooves and protrusions. It can be a continuously extended plate body or a plate body with openings (such as mounting holes for installing fasteners, through holes serving as heat dissipation inlets 103, etc.).

[0111] The first cover plate 13 may be a flat plate or a non-flat plate with a concave-convex structure, and may be a continuously extending plate or a plate with openings (such as mounting holes for mounting fasteners, etc.).

[0112] The perimeter of the partition plate 12 is connected to the side panel 11, thereby forming a housing cavity 101 with the side panel 11. Specifically, the partition plate 12 covers one open end of the space enclosed by the side panel 11, thereby forming the space enclosed by the side panel 11 into the housing cavity 101 for accommodating the battery cells 200. A heat dissipation inlet 103 is provided on the partition plate 12, so that the battery cells 200 are aligned with the heat dissipation inlet 103 when installed in the housing cavity 101. This reduces the path of the first guide channel 211 and allows emissions to be promptly discharged to the heat dissipation channel 102 in the event of thermal runaway.

[0113] The first cover plate 13 cooperates with the partition plate 12 to define a second channel 105, so that the second channel 105 and the accommodating cavity 101 are respectively located on both sides of the partition plate 12, so that the emissions can directly enter the second channel 105 through the heat dissipation inlet 103 on the partition plate 12, so that the emissions can be separated from the battery cells 200 in the accommodating cavity 101 in time by the partition plate 12, thereby reducing the impact of the high temperature of the emissions on the battery cells 200.

[0114] It should be noted that the first cover plate 13 can be connected to the partition plate 12 for installation, the first cover plate 13 can also be connected to the side frame 11 for installation, and the fasteners can be sequentially passed through the first cover plate 13, the partition plate 12 and the side frame 11 as shown in Figure 6 to achieve the connection between the three, which is all within the scope of protection of this application.

[0115] In some specific embodiments, referring to Figures 5 and 6 , the periphery of the partition plate 12 is sandwiched between the first cover plate 13 and the side frame 11. In other words, the side frame 11, the partition plate 12, and the first cover plate 13 are sequentially arranged along the third direction F3 (the vertical direction as shown in Figure 5 ). The first cover plate 13 and the side frame 11 facilitate the installation and positioning of the partition plate 12, and improve the partition plate 12's ability to separate the accommodating cavity 101 from the second channel 105.

[0116] Furthermore, a communication port 121 is provided along the periphery of the partition plate 12, connecting the second channel 105 and the first channel 104. The communication port 121 extends through the partition plate 12 in the third direction F3. This allows exhaust within the second channel 105 located on one side of the partition plate 12 to flow through the communication port 121 and into the first channel 104. The partition plate 12 is unlikely to interfere with the flow of exhaust within the heat dissipation channel 102.

[0117] There can be one or more communication openings 121. The communication openings 121 can be circular, elliptical, oval, or elongated. Multiple communication openings 121 can be spaced along the perimeter of the partition plate 12. This not only increases the area of ​​communication between the first channel 104 and the second channel 105, but also allows for improved discharge efficiency when a communication opening 121 in one area is unable to promptly discharge waste. Furthermore, it helps ensure that waste from different areas within the second channel 105 can flow promptly into the first channel 104.

[0118] In some embodiments, referring to Figures 4-6 , a second guide member 22 is provided between the periphery of the partition plate 12 and the side panel 11. The second guide member 22 defines a second guide channel 221. The ends of the second guide member 22 are respectively sealed with the partition plate 12 and the side panel 11, so that the second guide channel 221 communicates with the communication port 121 and the first channel 104.

[0119] The second guide channel 221 of the second guide member 22 can limit the flow path of the emissions, so that the emissions flowing out of the connecting port 121 are not easily leaked into the accommodating cavity 101 from between the partition plate 12 and the side frame 11, thereby reducing interference with the battery cells 200 and the high-voltage circuit in the accommodating cavity 101.

[0120] Optionally, the second guide member 22 may be an elastic member to improve the sealing effect. Each second guide member 22 may be provided with a first second guide channel 221, or may be provided with multiple second guide channels 221. Each second guide channel 221 may correspond to one communication port 121, or may correspond to multiple communication ports 121.

[0121] According to some embodiments of the present application, referring to FIG6 , a one-way valve 40 may be provided at the heat dissipation inlet 103. The one-way valve 40 allows one-way flow from the accommodating chamber 101 to the heat dissipation channel 102. By providing the one-way valve 40, the exhaust from the first pressure relief portion 210 can only flow through the heat dissipation inlet 103 into the heat dissipation channel 102, while the exhaust within the heat dissipation channel 102 cannot flow back through the heat dissipation inlet 103 to the battery cell 200. This can further improve the heat dissipation effect and reduce the impact of high-temperature exhaust on the battery cell 200 and the high-voltage circuit.

[0122] The specific structure of the one-way valve 40 is not limited. For example, as shown in FIG6 , the one-way valve 40 is a blocking plate, and the blocking plate is located on the side of the partition plate 12 facing away from the first guide member 21. In a state where thermal runaway has not occurred, the periphery of the blocking plate fits against the periphery of the heat dissipation inlet 103 to block the heat dissipation inlet 103; in a state where thermal runaway has occurred, the first pressure relief portion 210 discharges the exhaust, and the high pressure of the exhaust pushes the blocking plate open, so that at least part of the periphery of the blocking plate is separated from the partition plate 12 to form a gap to open the heat dissipation inlet 103, and the exhaust in the first guide channel 211 can smoothly pass through the heat dissipation inlet 103 into the heat dissipation channel 102. The above-mentioned blocking plate type one-way valve 40 has a simple structure, occupies a small space, can reduce the obstruction of the heat dissipation channel 102, and improve the heat dissipation effect. Of course, the structure of the one-way valve 40 includes but is not limited to this, and it only needs to meet the requirement of being able to guide the heat dissipation inlet 103 in a one-way manner.

[0123] The specific structure of the first channel 104 according to some embodiments of the present application is described below with reference to the accompanying drawings.

[0124] Referring to Figures 5-10, Figure 7 is a left side view of a battery 1000 provided in some embodiments of the present application, Figure 8 is a cross-sectional view taken along line DD in Figure 7, Figure 9 is a cross-sectional view taken along line EE in Figure 8, and Figure 10 is an enlarged structural diagram of the area circled H in Figure 9. In some embodiments of the present application, the first channel 104 includes multiple layers of sub-channels 106 stacked in a direction away from the accommodating cavity 101, wherein the sub-channel 106 closest to the accommodating cavity 101 communicates with the second channel 105, and the remaining sub-channels 106 communicate with the second channel 105 or communicate through the sub-channel 106 closest to the accommodating cavity 101.

[0125] The direction away from the accommodating cavity 101 can be the second direction F2 shown in Figures 5 and 6, such as the left-right direction. The multiple layers of sub-channels 106 are stacked along the second direction F2, and the multiple layers can be two or more layers. The sub-channel 106 closest to the accommodating cavity 101 refers to the sub-channel 106 with the shortest distance from the accommodating cavity 101 among the stacked multiple layers of sub-channels 106. For example, among the multiple layers of sub-channels 106 on the left side of the accommodating cavity 101 of the first channel 104, the sub-channel 106 located on the right side is the sub-channel 106 closest to the accommodating cavity 101.

[0126] At least a portion of the area between two adjacent layers of sub-channels 106 is separated by a partition structure. In some embodiments, the sub-channel 106 closest to the accommodating cavity 101 communicates with the second channel 105, while the remaining sub-channels 106 communicate with the second channel 105. In other words, multiple sub-channels 106 are separately connected to the second channel 105, allowing emissions from the second channel 105 to enter each of the multiple sub-channels 106, thereby increasing the flow path of the emissions. The partition structure between the two layers of sub-channels 106 isolates the high-temperature emissions from the remaining sub-channels 106 from the accommodating cavity 101, further reducing the impact on the battery cells 200 and high-voltage circuit within the accommodating cavity 101.

[0127] In other embodiments, the sub-channel 106 closest to the accommodating chamber 101 is connected to the second channel 105, and the remaining sub-channels 106 are connected through the sub-channel 106 closest to the accommodating chamber 101. In other words, the exhaust discharged from the second channel 105 first enters the sub-channel 106 closest to the accommodating chamber 101, and then flows into the remaining sub-channels 106. As a result, the flow path of the exhaust in the first channel 104 is longer, which helps to reduce the temperature of the exhaust discharged from the heat dissipation channel 102.

[0128] In some embodiments including multiple layers of sub-channels 106 , referring to FIG. 6 and FIG. 10 , two adjacent sub-channels 106 are connected via a plurality of first through holes, and the plurality of first through holes are spaced apart and arranged along the surrounding direction of the side frame 11 .

[0129] For example, the side frame 11 may include two first side beams 111 that are opposed to each other along a first direction F1 (e.g., a front-to-rear direction) and two second side beams 112 that are opposed to each other along a second direction F2 (e.g., a left-to-right direction). The length of the first side beams 111 extends along the second direction F2, and the length of the second side beams 112 extends along the first direction F1. The first direction F1 and the second direction F2 intersect (including but not limited to being perpendicular). The multiple first through holes provided in the first side beams 111 may be spaced apart along the second direction F2, and the multiple first through holes provided in the second side beams 112 may be spaced apart along the first direction F1.

[0130] By connecting two adjacent sub-channels 106 through multiple first through holes, on the one hand, the opening area on the partition structure between the two layers of sub-channels 106 can be reduced, thereby improving the structural strength; on the other hand, the emissions in one sub-channel 106 can flow more evenly along the length direction of the sub-channel 106 and flow from multiple locations to the other sub-channel 106, thereby improving the flow efficiency of the emissions between the two sub-channels 106, increasing the flow path of the emissions, and improving the cooling effect.

[0131] In some embodiments including a multi-layer sub-channel 106, referring to Figures 6 and 10, the same sub-channel 106 may include a multi-layer sub-chamber 108 stacked in a direction away from the partition plate 12, and two adjacent sub-chambers 108 are connected by a plurality of second through holes 109, and the plurality of second through holes 109 are spaced apart and arranged in a surrounding direction of the side frame 11.

[0132] The direction away from the partition plate 12 may be the third direction F3 shown in Figures 5 and 6 . At least portions of adjacent sub-chambers 108 are separated by a partition structure and connected via a plurality of second through-holes 109. This partition structure not only improves the structural strength of the side panel 11 but also allows exhaust from one sub-chamber 108 to flow more evenly along its length and from multiple locations into the next sub-chamber 108. This improves the flow efficiency of the exhaust between the two sub-chambers 108 and increases the exhaust flow path within the sub-channel 106, enhancing the cooling effect.

[0133] In some embodiments where a plurality of first through holes and a plurality of second through holes 109 are provided at the same time, the first through holes and the second through holes 109 may be arranged correspondingly or staggered in the length direction of the first channel 104 .

[0134] In some embodiments of the present application, a guide structure may be further provided in the second channel 105 to guide the flow path of the exhaust in the second channel 105 , which is beneficial to improving the heat dissipation effect and the emission efficiency.

[0135] Please refer to Figures 8-16, wherein Figure 11 is a cross-sectional view of Figure 8 along line FF, Figure 12 is an enlarged schematic diagram of the structure indicated by circle J in Figure 11, Figure 13 is a cross-sectional view of Figure 8 along line GG, Figure 14 is a top view of the first cover plate 13 provided in some embodiments of the present application, Figure 15 is a schematic diagram of the structure of the first cover plate 13 provided in some embodiments of the present application, and Figure 16 is an enlarged schematic diagram of the structure indicated by circle K in Figure 15. In some embodiments, a plurality of flow guides 30 are provided in the second channel 105. The plurality of flow guides 30 are spaced apart along the first direction F1 and extend along the second direction F2. The inlet of the first channel 104 is located at the end of the first channel 104 along the second direction F2, and the outlet of the first channel 104 is located at the end of the first channel 104 along the second direction F2 or at the end of the first channel 104 along the first direction F1, with the first direction F1 intersecting the second direction F2.

[0136] The flow guide 30 is a component that can guide the discharge in the second channel 105 so that at least part of the discharge can flow along the flow guide 30. For example, the flow guide 30 can be a sheet (such as a fin), a strip block, or the like.

[0137] The plurality of flow guides 30 are spaced apart and arranged along the first direction F1, and the flow guides 30 extend along the second direction F2, so that the portion of the second channel 105 located between two adjacent flow guides 30 forms a flow guide channel. The inlet of the first channel 104 is located at an end (one or both ends) of the first channel 104 along the second direction F2. Exhaust can flow along the flow guide channel in the second direction F2, reaching the inlet of the first channel 104 as quickly as possible and entering the first channel 104 more quickly, thereby improving heat dissipation efficiency.

[0138] The material of the flow guide 30 can be flexibly configured. For example, it can be made of a heat-insulating material to reduce heat transfer between adjacent flow guide channels. Alternatively, the flow guide 30 can be made of a heat-dissipating material to form a larger heat transfer area with the first cover plate 13, thereby increasing the efficiency of heat transfer to the first cover plate 13 and improving the heat dissipation effect. For example, the heat conductor can be a metal sheet.

[0139] Furthermore, the outlet of the first channel 104 is located at the end of the first channel 104 along the second direction F2, that is, the inlet and outlet of the first channel 104 are located on the same side of the second channel 105 along the second direction F2. This reduces the length of the first channel 104 and allows the exhaust within the first channel 104 to be quickly discharged outside the housing 100, thereby reducing the impact on the battery cells 200 and the high-voltage circuit within the housing 100. Alternatively, the outlet of the first channel 104 can be located at the end of the first channel 104 along the first direction F1, that is, the inlet and outlet of the first channel 104 are respectively located on adjacent sides of the second channel 105. This increases the length of the first channel 104, allowing the exhaust to be fully cooled within the first channel 104, thereby reducing the temperature of the exhaust discharged from the heat dissipation channel 102 and minimizing harm to nearby personnel.

[0140] In some embodiments, referring to Figures 9-10 and 15-16 , the plurality of guides 30 include a first guide 31 positioned opposite the battery cell 200. At least one first guide 31 includes a first guide portion 311. Two adjacent first guide portions 311 along the first direction F1 correspond to the same battery cell 200 and are located on either side of the heat dissipation inlet 103. The first guide portions 311 abut against the partition plate 12.

[0141] The first air guide 31 is opposite to the battery cell 200 , which means that in the arrangement direction of the side frame 11 , the partition plate 12 and the first cover plate 13 , for example, in the third direction F3 , the projection of the first air guide 31 at least partially overlaps with the projection of the battery cell 200 .

[0142] Among all the first flow guides 31, each first flow guide 31 may include the first flow guide portion 311, or some of the first flow guides 31 may include the first flow guide portion 311. For example, in the examples shown in Figures 15 and 16 , the first flow guides 31 including the first flow guide portion 311 and the first flow guides 31 not including the first flow guide portion 311 are alternately arranged along the first direction F1.

[0143] Two adjacent first guides 311 along the first direction F1 correspond to the same battery cell 200 and are located on either side of the heat dissipation inlet 103. The first guides 311 abut against the partition plate 12, allowing exhaust entering the second channel 105 from the heat dissipation inlet 103 to flow between the two adjacent first guides 311. The abutment between the first guides 311 and the partition plate 12 restricts the flow direction of the exhaust, allowing it to flow along the first guides 311 in the second direction F2, thereby more quickly reaching the first channel 104 and improving heat dissipation efficiency. Furthermore, the abutment between the first guides 311 and the partition plate 12 supports the partition plate 12, improving its stability and, consequently, its support for the battery cell 200.

[0144] In some embodiments, referring to Figures 11-12 and 15-16 , at least one air guide 30 includes a second air guide portion 312 . The second air guide portion 312 is adjacent to the first air guide portion 311 along the second direction F2 and is located on both sides of the heat dissipation inlet 103 and corresponds to the battery cells 200 . The second air guide portion 312 abuts against the partition plate 12 .

[0145] The second air guiding portions 312 can support the partition plate 12 on both sides of the heat dissipation inlet 103 along the second direction F2, thereby further improving the stability of the partition plate 12 and, in turn, the stability of the partition plate 12 in supporting the battery cells 200. For example, as shown in Figure 16 , the projection of each second air guiding portion 312 along the third direction F3 can overlap with the projections of two battery cells 200, meaning that the second air guiding portion 312 faces and supports the shoulders of the two battery cells 200. Six second air guiding portions 312 are provided for each battery cell 200, and the three second air guiding portions 312 located on the same side of the heat dissipation inlet 103 are arranged along the first direction F1.

[0146] In some specific embodiments, referring to Figures 9-12 and 15-16, the flow guide 30 further includes a third flow guide portion 313. The third flow guide portion 313 is arranged and connected to the second flow guide portion 312 in the same flow guide 30 along the second direction F2, and the protrusion height of the third flow guide portion 313 is smaller than that of the second flow guide portion 312.

[0147] As a result, a certain gap is formed between the third guide portion 313 and the partition plate 12. When excessive discharge occurs between two adjacent first guide members 31, the discharge can not only flow along the guide channel in the second direction F2, as indicated by arrow a in Figure 16, but can also flow beyond the third guide portion 313 and through the adjacent guide channel in the second direction F2, as indicated by arrow B, thereby improving discharge and heat dissipation efficiency. The provision of the third guide portion 313 also extends the discharge flow path, effectively reducing temperature.

[0148] In some specific embodiments, as shown in Figures 15 and 16 , the first guide portions 311, second guide portions 312, and third guide portions 313 of the plurality of first guide members 31 are positioned identically along the second direction F2, such that the plurality of first guide portions 311, the plurality of second guide portions 312, and the plurality of third guide portions 313 are arranged in a row along the first direction F1. Each battery cell 200 corresponds to three first guide members 31. The middle first guide member 31 does not include the first guide portion 311, thereby ensuring a sufficient area opposite the heat dissipation inlet 103 and improving the efficiency of exhaust entering the second channel 105. The first guide members 31 at both ends each include the first guide portion 311, the second guide portion 312, and the third guide portion 313, thereby improving the diversion effect.

[0149] According to some embodiments of the present application, please refer to Figures 14 to 16, the multiple flow guides 30 also include a second flow guide 32, and the second flow guide 32 is opposite to the electrical connection structure of the battery 1000. In other words, the projection of the second flow guide 32 along the third direction F3 at least partially overlaps with the projection of the electrical connection structure.

[0150] In addition, the second guide member 32 is arranged to be spaced apart from the partition plate 12 so that a guide channel can be formed between two adjacent second guide members 32 or between a second guide member 32 and an adjacent first guide member 31, which can also be used for guiding and dissipating heat of emissions, or for dissipating heat generated by the operation of the electrical connection structure, thereby improving the heat dissipation effect.

[0151] In some embodiments of the present application, the materials of the partition plate 12 and the first cover plate 13 can be flexibly set according to actual needs.

[0152] For example, the partition plate 12 may be a thermal insulation board, which is a board made of a thermal insulation material. Thermal insulation material, also known as thermal insulation material, refers to a material that can reduce or block heat flow transfer, and includes, but is not limited to, fiberglass, asbestos, and mica. The thermal insulation board can reduce the heat transfer from high-temperature exhaust in the second channel 105 to the accommodating cavity 101, thereby reducing the impact on the battery cells 200 and high-voltage circuit in the accommodating cavity 101.

[0153] For example, the first cover plate 13 may be a heat sink, which is a plate made of a thermally conductive material. A thermally conductive material refers to a material with low thermal resistance, including but not limited to metals such as steel and aluminum, or non-metals such as resin, glass fiber, and carbon fiber, or a mixture of metals and non-metals. The heat sink can increase the heat dissipation of high-temperature exhaust in the second channel 105 to the outside of the housing 100, thereby reducing heat dissipation efficiency.

[0154] In some embodiments of the present application, an adsorption material layer is provided on at least a portion of the heat dissipation channel 102. For example, in some embodiments where the heat dissipation channel 102 includes a first channel 104 and a second channel 105, the adsorption material layer may be provided on at least a portion of only the first channel 104, or on at least a portion of the second channel 105, or on at least a portion of both the first channel 104 and the second channel 105.

[0155] The adsorption material layer refers to a material layer attached to the surface of the heat dissipation channel 102 and capable of adsorbing emissions flowing through the heat dissipation channel 102. Optionally, the adsorption material layer may include, but is not limited to, adsorption materials such as silica gel, activated alumina, activated carbon, and molecular sieves. Adsorption materials typically have a large specific surface area, a suitable pore structure and surface structure, have a strong adsorption capacity for the adsorbate, and generally do not chemically react with the adsorbate or the medium.

[0156] By providing an adsorption material layer, harmful substances such as smoke in the emissions can be adsorbed to reduce or avoid the harmful substances being discharged from the heat dissipation outlet of the heat dissipation channel 102 and affecting the health of surrounding people, thereby improving the smokeless emission effect.

[0157] According to some embodiments of the present application, referring to Figures 3 and 8 , a second pressure relief portion 50 may be provided at the outlet of the heat dissipation channel 102. The second pressure relief portion 50 is used to release substances within the heat dissipation channel 102 when the pressure within the heat dissipation channel 102 is excessive. The second pressure relief portion 50 may be an explosion-proof valve or explosion-proof disk. The provision of the second pressure relief portion 50 facilitates the smooth discharge of the exhaust from the heat dissipation channel 102 and closes the heat dissipation outlet of the heat dissipation channel 102 when thermal runaway is not occurring.

[0158] In some embodiments of the present application, the box body 10 can be a component that is separately installed on the electrical device 2000. For example, in some embodiments where the electrical device 2000 is a vehicle, the box body 10 can be an independent component connected to the frame of the vehicle; or, a part of the electrical device 2000 can be used for the box body 10, for example, a part of the frame can be used for the box body 10.

[0159] For example, according to some embodiments of the present application, please refer to Figures 1-3 and Figure 17. Figure 17 is a schematic structural diagram of a side panel frame 11 provided in some embodiments of the present application. The box body 10 includes two first side beams 111 opposing each other along a first direction F1 and two second side beams 112 opposing each other along a second direction F2. The first side beams 111 are rear cross beams of the front frame 300 or the rear frame 400, and the second side beams 112 are door sill beams. The first direction F1 intersects the second direction F2.

[0160] The door sill beam is one of the important protective components of a vehicle. It can effectively withstand external impacts during a side collision of the vehicle, thereby protecting the integrity of the passenger compartment and reducing the degree of injury to the vehicle occupants.

[0161] In other words, the traditional mounting beams are eliminated, and the rear cross beam of the front frame 300, the front cross beam of the rear frame 400, and the door sill beam are directly used for the box body 10 of the battery 1000, which saves the space occupied by the traditional mounting beams and increases the available space in the box body 100 for installing the battery cells 200 and the heat dissipation channel 102 for heat dissipation, thereby improving space utilization, thereby increasing the amount of electricity that can be installed in the battery 1000 and the heat dissipation effect, which is beneficial to the improvement of the energy of the entire vehicle.

[0162] In some embodiments of the present application, referring to FIG5 , the box body 100 further includes a second cover plate 14, the periphery of which is connected to the box body 10 to seal the top opening of the accommodating cavity 101. This facilitates forming the accommodating cavity 101 into a closed cavity, thereby improving the operational stability of the battery 1000.

[0163] The second cover plate 14 may be an independent plate provided under the front floor of the vehicle, so that the top opening of the accommodating cavity 101 can be sealed by the second cover plate 14 before the battery 1000 is connected to other components of the vehicle, thereby achieving a more reliable seal.

[0164] Alternatively, the second cover plate 14 may be a front floor. The front floor is a component of a vehicle that supports loads such as those caused by foot traffic and seat support. Using the front floor as the second cover plate 14 not only seals the battery 1000 but also reduces the number of components, thereby improving height space utilization and increasing the capacity of the battery 1000, ultimately boosting overall vehicle performance.

[0165] 1-3 , a battery 1000 according to an embodiment of the second aspect of the present application includes a battery cell 200 and a housing 100 of the battery 1000 according to the embodiment of the first aspect of the present application, wherein the battery cell 200 is disposed within the housing 100. Thus, by employing the aforementioned housing 100, high-temperature emissions emitted by the battery cell 200 when thermal runaway occurs can be promptly isolated from the battery cell 200 and the high-voltage circuit, and the temperature of the emissions can be reduced, thereby reducing the risk of thermal runaway caused by elevated temperatures in the surrounding battery cells 1000 and the high-voltage circuit.

[0166] Referring to FIG. 18 , an electrical device 2000 according to an embodiment of the third aspect of the present application includes a battery 1000 according to the embodiment of the second aspect of the present application, and the battery 1000 is used to provide electrical energy to the electrical device 2000. Thus, by employing the aforementioned battery 1000, high-temperature emissions emitted when a battery cell 200 experiences thermal runaway can be promptly isolated from the battery cell 200 and the high-voltage circuit, and the temperature of the emissions can be reduced, thereby reducing the risk of thermal runaway caused by elevated temperatures in the surrounding battery cells 1000 and the high-voltage circuit.

[0167] Alternatively, as shown in FIG18 , a schematic diagram of the structure of an electric device 2000 provided in some embodiments of the present application is provided. When the electric device 2000 is a vehicle, the battery 1000 can be located at the bottom, front, or rear of the vehicle. The battery 1000 can be used to power the vehicle, for example, as an operating power source for the vehicle. The vehicle may also include a controller and a motor, with the controller controlling the battery 1000 to power the motor, for example, to meet the vehicle's power requirements for starting, navigation, and driving.

[0168] In some embodiments, the battery 1000 is arranged at the bottom of the vehicle, and the box 100 of the battery 1000 can be connected to the frame of the vehicle, or the box 100 includes components such as the vehicle's rocker beam, the rear cross beam of the front frame, the front cross beam of the rear frame, and the front floor, so as to reduce the number of parts and increase the space of the battery 1000 for installing the battery cell 200.

[0169] A battery 1000 and a vehicle having the same according to a specific embodiment of the present application will be described below with reference to the accompanying drawings.

[0170] Referring to Figures 1-18, the battery 1000 includes a housing 100 and a plurality of battery cells 200. The housing 100 includes a housing body 10, a first guide member 21, a second guide member 22, a flow guide member 30, a one-way valve 40, and a second pressure relief portion 50. The housing body 10 includes a side panel 11, a partition plate 12, a first cover plate 13, and a second cover plate 14. The rear crossbeam of the vehicle's front frame 300, the front crossbeam of the rear frame 400, and two door sills are connected end to end to form the side panel 11. The vehicle's front floor serves as the second cover plate 14, covering the top opening of the side panel 11. The partition plate 12 covers the bottom opening of the side panel 11. The first cover plate 13 is disposed on the lower side of the partition plate 12, and a plurality of flow guide members 30 are disposed on the side of the first cover plate 13 facing the partition plate 12.

[0171] The first guide member 21 and the second guide member 22 are both compressible elastic members, which are elliptical or annular. The one-way valve 40 is a sealing plate. The first pressure relief part 210 and the second pressure relief part 50 are both explosion-proof valves. The partition plate 12 is a heat insulation plate, which is made of heat insulation material or has heat insulation material attached to the surface. It can not only separate the emissions, but also reduce the heat transfer in the heat dissipation channel 102 to the battery cell 200. The first cover plate 13 is a heat dissipation plate, which is made of a material with low thermal resistance. The guide member 30 is a fin, which can increase the heat dissipation area of ​​the heat dissipation plate and improve the heat dissipation efficiency. Adsorption material is attached to the heat dissipation channel 102 to adsorb flue gas.

[0172] The battery cells 200 are arranged in multiple rows along a first direction F1, with each row comprising multiple battery cells 200 arranged along a second direction F2. The lower end surface of each battery cell 200 is provided with two electrical connectors 220 and a first pressure relief portion 210 located between the two electrical connectors 220. The heat dissipation inlets 103 on the partition plate 12 are arranged opposite the first pressure relief portions 210, and the first guide members 21 connect the first pressure relief portions 210 and the heat dissipation inlets 103 in a one-to-one correspondence.

[0173] The fins extend in the left-right direction, with multiple fins spaced apart in the front-to-back direction. The left and right sills provide inlets for the first channel 104, and the partition plate 12 has a communication port 121 opposite the inlet of the first channel 104. The front and rear crossbeams provide outlets for the first channel 104, each equipped with a second pressure relief portion 50.

[0174] The multiple fins include a first guide member 31 and a second guide member 32. One type of first guide member 31 includes a first guide portion 311, a second guide portion 312, and a third guide portion 313, while another type of first guide member 31 includes a second guide portion 312 and a third guide portion 313. Two adjacent first guide portions 311 in the front-to-back direction are located on either side of the heat dissipation inlet 103 and abut against the partition plate 12. The second guide portion 312 corresponds to the shoulder of the battery cell 200 and abuts against the partition plate 12, thereby enhancing structural strength. The third guide portion 313 is relatively low in height. When emissions enter the second channel 105, most are blocked by the first guide portion 311. The remaining portion is effectively intercepted by the second guide portion 312 and the third guide portion 313. The flue gas can fully exchange heat with the external environment of the battery 1000 through the first cover plate 13 and the multiple guide members 30. The second flow guide 32 has a relatively small height and is spaced apart from the partition plate 12 . The second flow guide 32 corresponds to the electrical connection structure of the battery cell 200 and can be used to achieve heat dissipation at the electrical connection structure.

[0175] When thermal runaway occurs in the battery cell 200, the first pressure relief portion 210 opens, and the ejecta and smoke from the battery cell 200 enter the first guide channel 211. When the pressure reaches a certain level, the sealing plate is pushed open, and the emissions enter the second channel 105. The ejecta can be retained in the second channel 105. The smoke is adsorbed by the adsorption material layer and dissipated by the heat sink, and then enters the first channel 104 through the second guide channel 221. After being further adsorbed by the adsorption material and dissipated by the frame, the smoke enters the external space through the second pressure relief portion 50.

[0176] It should be noted that, unless there is any conflict, the embodiments and features in the embodiments of this application can be combined with each other.

[0177] The above are merely preferred embodiments of the present application and are not intended to limit the present application. Those skilled in the art will readily appreciate that various modifications and variations are possible. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present application shall be included within the scope of protection of the present application.

Claims

1. A battery box, wherein: include: A box body, wherein the box body defines a receiving cavity and a heat dissipation channel, wherein the receiving cavity is used to receive a battery cell of the battery, and a heat dissipation inlet of the heat dissipation channel is disposed on a cavity wall of the receiving cavity; The first guide member defines a first guide channel, and the two ends of the first guide member are respectively used to seal with the battery cell and the cavity wall of the accommodating cavity, so that the first guide channel connects the first pressure relief portion of the battery cell and the heat dissipation inlet.

2. The battery case according to claim 1, wherein: The first guide member is an elastic member and stops between the battery cell and the cavity wall of the accommodating cavity.

3. The battery case according to claim 1 or 2, wherein: There are a plurality of the first guide channels and a plurality of the heat dissipation inlets, and the plurality of the first guide channels are connected to the first pressure relief portion and the heat dissipation inlet in a one-to-one correspondence.

4. The battery case according to any one of claims 1 to 3, wherein: The heat dissipation channel includes a first channel and a second channel, and the box body includes: A side frame, wherein the side frame is provided with the first channel; A partition plate, the periphery of which is connected to the side frame to cooperate with and define the accommodating cavity, and the partition plate is provided with the heat dissipation inlet; A first cover plate, wherein the second channel is defined between the first cover plate and the partition plate, and the second channel and the accommodating cavity are respectively located on two sides of the partition plate.

5. The battery case according to claim 4, wherein: The periphery of the partition plate is sandwiched between the first cover plate and the side frame, and the periphery of the partition plate is provided with a communication port communicating the second channel with the first channel.

6. The battery case according to claim 5, wherein: A second guide member is provided between the periphery of the partition plate and the side frame, the second guide member defines a second guide channel, and both ends of the second guide member are respectively sealed with the partition plate and the side frame so that the second guide channel connects the connecting port and the first channel.

7. The battery case according to any one of claims 4 to 6, wherein: The first channel includes multiple layers of sub-channels stacked in a direction away from the accommodating cavity, wherein the sub-channel closest to the accommodating cavity is connected to the second channel, and the remaining sub-channels are connected to the second channel or through the sub-channel closest to the accommodating cavity.

8. The battery case according to claim 7, wherein: Two adjacent sub-channels are connected via a plurality of first through holes, and the plurality of first through holes are arranged at intervals along the surrounding direction of the side frame; and / or, The same sub-channel includes multiple layers of sub-chambers stacked in a direction away from the partition plate, and two adjacent sub-chambers are connected through a plurality of second through holes, and the plurality of second through holes are spaced apart and arranged in a surrounding direction of the side frame.

9. The battery case according to any one of claims 4 to 8, wherein: A plurality of flow guides are provided in the second channel, the plurality of flow guides are arranged at intervals along the first direction, and the flow guides extend along the second direction, the inlet of the first channel is provided at the end of the first channel along the second direction, the outlet of the first channel is provided at the end of the first channel along the second direction or the end of the first channel along the first direction, and the first direction intersects with the second direction.

10. The battery case according to claim 9, wherein: The multiple guide members include a first guide member opposite to the battery cell, at least one of the first guide members includes a first guide portion, two adjacent first guide portions along the first direction correspond to the same battery cell and are respectively located on both sides of the heat dissipation inlet, and the first guide portion is against the partition plate.

11. The battery case according to claim 10, wherein: At least one of the guide members includes a second guide portion, the second guide portion adjacent to the first guide portion along the second direction is located on both sides of the heat dissipation inlet and corresponds to the battery cell, and the second guide portion abuts against the partition plate.

12. The battery case according to claim 11, wherein: The guide member further includes a third guide portion. The third guide portion and the second guide portion in the same guide member are arranged along the second direction and connected. The protruding height of the third guide portion is smaller than that of the second guide portion.

13. The battery case according to any one of claims 10 to 12, wherein: The plurality of flow guides include a second flow guide opposite to the electrical connection structure of the battery, and the second flow guide is spaced apart from the partition plate.

14. The battery case according to any one of claims 4 to 13, wherein: The partition plate is a heat insulation plate, and the first cover plate is a heat dissipation plate.

15. The battery case according to any one of claims 1 to 14, wherein: At least a portion of the heat dissipation channel is provided with an adsorption material layer.

16. The battery case according to any one of claims 1 to 15, wherein: A one-way valve is provided at the heat dissipation inlet, and the one-way valve is unidirectionally conducted in a direction from the accommodating cavity to the heat dissipation channel.

17. The battery case according to any one of claims 1 to 16, wherein: A second pressure relief portion is provided at the outlet of the heat dissipation channel.

18. The battery case according to any one of claims 1 to 17, wherein: The box body includes two first side beams opposite to each other along a first direction and two second side beams opposite to each other along a second direction, the first side beams are rear cross beams of the front frame or the front cross beams of the rear frame, the second side beams are door sill beams, and the first direction intersects with the second direction.

19. The battery case according to any one of claims 1 to 18, wherein: It also includes a second cover plate, the periphery of which is connected to the box body to cover the top opening of the accommodating cavity, and the second cover plate is a front floor.

20. A battery, wherein: A box body comprising a battery cell and a battery according to any one of claims 1 to 19, wherein the battery cell is arranged in the box body.

21. An electrical device, wherein: The invention comprises a battery as claimed in any one of claims 1 to 20, wherein the battery is used to provide electrical energy to the electrical device.

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