Box body of battery, battery and electric device

Abstract

A battery box, a battery and an electric device, the box comprises: a box body, the box body defines an accommodating cavity and a heat dissipation channel, the accommodating cavity is used for accommodating a battery monomer of the battery, and the cavity wall of the accommodating cavity is provided with a heat dissipation inlet of the heat dissipation channel; a first guide channel is defined by the first guide piece, and the two ends of the first guide piece are used for being in sealing fit with the single battery and the cavity wall of the containing cavity respectively, so that the first guide channel is communicated with the first pressure relief part of the single battery and the heat dissipation inlet. According to the technical scheme, the heat dissipation channel is arranged, and the first guide channel of the first guide piece is communicated with the first pressure relief part of the battery monomer and the heat dissipation inlet of the heat dissipation channel, so that high-temperature emissions discharged when the battery monomer is subjected to thermal runaway can be timely separated from the battery monomer and a high-voltage loop, and the temperature of the emissions is reduced; and the risk of thermal runaway caused by temperature rise of surrounding battery units and high-voltage loops is reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of batteries, and in particular to a battery box, a battery and an electrical device. Background Art

[0002] When the battery is in thermal runaway, it will release a large amount of eruption. In the related art, the eruption is likely to cause high-voltage short circuit ignition, the temperature inside the battery rises, and a chain reaction of thermal runaway is triggered. Summary of the invention

[0003] The embodiment of the present invention provides a battery box, which can reduce the impact of the eruption of a battery cell on other surrounding battery cells and reduce the risk of thermal runaway.

[0004] In a first aspect, an embodiment of the present invention provides a battery box, comprising: a box body, the box body defining a accommodating cavity and a heat dissipation channel, the accommodating cavity is used to accommodate a battery cell of the battery, and the cavity wall of the accommodating cavity is 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 the first pressure relief portion of the battery cell and the heat dissipation inlet.

[0005] 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 time, and the temperature of the emissions can be reduced, thereby reducing the risk of thermal runaway caused by increased temperatures of surrounding battery units and high-voltage circuits.

[0006] In some embodiments, the first guide member is an elastic member and is stopped between the battery cell and the cavity wall of the accommodating cavity.

[0007] 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.

[0008] In some embodiments, 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.

[0009] 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.

[0010] 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.

[0011] 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 time by the partition plate, reducing the impact of the high temperature of the emissions on the battery cells.

[0012] 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 connecting opening connecting the second channel and the first channel.

[0013] 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.

[0014] In some embodiments, 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 the two ends of the second guide member are respectively sealed with the partition plate and the side frame to enable the second guide channel to connect the connecting port and the first channel.

[0015] 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 from between the partition plate and the side frame, thereby reducing interference with the battery cells and high-voltage circuits in the accommodating cavity.

[0016] 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.

[0017] In the above technical solution, multiple sub-channels are respectively connected to the second channel, so that the emissions discharged from the second channel can enter the multiple sub-channels respectively, which can increase the flow path of the emissions, and use the partition structure between the two layers of sub-channels to separate the high-temperature emissions of the remaining sub-channels from the accommodating cavity to further reduce the impact on the battery cells and high-voltage circuits in the accommodating cavity. Alternatively, the emissions discharged from the second channel first enter the sub-channel closest to the accommodating cavity, and then flow into the remaining sub-channels, thereby making the flow path of the emissions in the first channel longer, which is conducive to reducing the temperature of the emissions discharged from the heat dissipation channel.

[0018] In some embodiments, two adjacent sub-channels 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.

[0019] In the above technical solution, two adjacent sub-channels are connected by a plurality of first through holes, which can, on the one hand, reduce the opening area on the partition structure between the two layers of sub-channels and improve the structural strength; on the other hand, it can enable the emissions in one sub-channel to 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.

[0020] In some embodiments, the same sub-channel includes a plurality of sub-chambers stacked in a direction away from the partition plate, and two adjacent sub-chambers are connected by a plurality of second through holes, and the plurality of second through holes are spaced apart in a surrounding direction of the side frame.

[0021] 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, and 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.

[0022] In some embodiments, a plurality of guide members are provided in the second channel, the plurality of guide members are arranged at intervals along the first direction, and the guide members 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.

[0023] 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 beneficial to improving the heat dissipation efficiency.

[0024] In some embodiments, the plurality of 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.

[0025] In the above technical solution, the exhaust entering the second channel from the heat dissipation inlet can enter between two adjacent first guides, and the first guides abut against the partition plate to limit the flow direction of the exhaust, so that the exhaust can flow along the first guide along the second direction, thereby flowing to the first channel more quickly to improve the heat dissipation efficiency. At the same time, the first guides abut against the partition plate, which can support the partition plate, improve the stability of the partition plate, and further improve the support stability of the partition plate for the battery cell.

[0026] 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.

[0027] 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 to the battery cell.

[0028] In some embodiments, the guide member further includes a third guide portion, and the third guide portion and the second guide portion in the same guide member are arranged along the second direction and connected, and the protruding height of the third guide portion is smaller than that of the second guide portion.

[0029] 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 members, 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 members, so as to improve the discharge efficiency and heat dissipation efficiency.

[0030] In some embodiments, the plurality of guides include a second guide opposite to the electrical connection structure of the battery, and the second guide is spaced apart from the partition plate.

[0031] 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 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.

[0032] In some embodiments, the partition plate is a heat insulation plate, and the first cover plate is a heat dissipation plate.

[0033] In the above technical solution, the heat insulation plate can reduce the heat transfer of the high-temperature exhaust in the second channel to the accommodating chamber, thereby reducing the impact on the battery cells and high-voltage circuit in the accommodating chamber. The heat dissipation plate 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.

[0034] In some embodiments, at least a portion of the heat dissipation channel is provided with an adsorption material layer.

[0035] In the above technical solution, by setting 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.

[0036] 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.

[0037] 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.

[0038] In some embodiments, a second pressure relief portion is provided at the outlet of the heat dissipation channel.

[0039] In the above technical solution, the second pressure relief portion is provided to facilitate the smooth discharge of the exhaust in the heat dissipation channel, and the heat dissipation outlet of the heat dissipation channel is closed when there is no thermal runaway.

[0040] 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 door sill beams, and the first direction intersects with the second direction.

[0041] 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.

[0042] 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.

[0043] In the above technical solution, the front floor is used as the second cover plate, 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, which is beneficial to the improvement of the energy of the entire vehicle.

[0044] In a second aspect, an embodiment of the present invention 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 invention, wherein the battery cell is disposed in the box body.

[0045] In a third aspect, an embodiment of the present invention 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

[0046] Figure 1 A bottom view of a battery provided for some embodiments of the present invention;

[0047] Figure 2 for Figure 1 A partial structural schematic diagram of , wherein the first cover plate and the partition plate are not shown;

[0048] Figure 3 for Figure 1 Exploded diagram of some structures;

[0049] Figure 4 for Figure 3 The middle circle shows the enlarged structural schematic diagram of B;

[0050] Figure 5 for Figure 1 A cross-sectional view along the direction indicated by line AA;

[0051] Figure 6 for Figure 5 The middle circle shows the enlarged structural schematic diagram of C;

[0052] Figure 7 A left side view of a battery provided for some embodiments of the present invention;

[0053] Figure 8 for Figure 7 A cross-sectional view along the direction indicated by line DD;

[0054] Fig. 9 for Figure 8 A cross-sectional view along the direction indicated by line EE;

[0055] Fig.10 for Fig. 9The middle circle shows the enlarged structural schematic diagram of H;

[0056] Fig.11 for Figure 8 A cross-sectional view along the direction indicated by line FF;

[0057] Fig.12 for Fig.11 The middle circle shows the enlarged structural schematic diagram of J;

[0058] Fig.13 for Figure 8 A cross-sectional view along the direction indicated by line GG;

[0059] Fig.14 A top view of a first cover plate provided for some embodiments of the present invention;

[0060] Fig.15 A schematic structural diagram of a first cover plate provided in some embodiments of the present invention;

[0061] Fig.16 for Fig.15 The middle circle shows the enlarged structural schematic diagram of K;

[0062] Fig.17 A schematic diagram of the structure of a side frame provided in some embodiments of the present invention;

[0063] Fig.18 A schematic diagram of the structure of an electrical device provided in some embodiments of the present invention.

[0064] Reference numerals:

[0065] 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;

[0066] Box body 10; accommodating cavity 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;

[0067] First guide member 21; first guide channel 211; second guide member 22; second guide channel 221;

[0068] The guide member 30; the first guide member 31; the first guide portion 311; the second guide portion 312; the third guide portion 313; the second guide member 32;

[0069] One-way valve 40; second pressure relief portion 50;

[0070] The first direction F1; the second direction F2; the third direction F3. DETAILED DESCRIPTION

[0071] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution in the embodiments of the present invention will be clearly described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0072] Unless otherwise defined, all technical and scientific terms used in the present invention have the same meanings as those commonly understood by technicians in the technical field of the present invention; the terms used in the present invention and the specification of the invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention; the terms "including" and "having" and any variations thereof in the specification and claims of the present invention and the above-mentioned drawings are intended to cover non-exclusive inclusions. The terms "first", "second", etc. in the specification and claims of the present invention or the above-mentioned drawings are used to distinguish different objects, rather than to describe a specific order or a primary and secondary relationship.

[0073] Reference to "embodiments" in the present invention means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present invention. The appearance of the phrase in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments.

[0074] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", and "attached" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be the internal communication of two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0075] The term "and / or" in the present invention is only a description of the association relationship of the associated objects, indicating that there can be three relationships. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in the present invention generally indicates that the associated objects before and after are in an "or" relationship.

[0076] In the embodiments of the present invention, the same reference numerals represent the same components, and for the sake of brevity, detailed descriptions of the same components are omitted in different embodiments. It should be understood that the thickness, length, width and other dimensions of various components in the embodiments of the present invention shown in the drawings, as well as the overall thickness, length, width and other dimensions of the integrated device are only exemplary and should not constitute any limitation to the present invention.

[0077] The term "plurality" used in the present invention refers to two or more (including two).

[0078] In the present invention, 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 mentioned in the present invention may include a battery module or a battery pack. Some batteries may include a housing for encapsulating one or more battery cells or multiple battery modules. The housing can prevent liquid or other foreign matter from affecting the charging or discharging of the battery cells. Of course, the housing of some batteries refers to the battery installation compartment of an electrical device.

[0079] In the present invention, the battery cell may include a lithium-ion secondary battery, a lithium-ion primary battery, a lithium-sulfur battery, a sodium-lithium-ion battery, a sodium-ion battery or a magnesium-ion battery, etc., and the embodiments of the present invention do not limit this. The battery cell may be cylindrical, flat, rectangular or other shapes, etc., and the embodiments of the present invention do not limit this. Battery cells are generally divided into three types according to the packaging method: cylindrical battery cells, square battery cells and soft-pack battery cells, and the embodiments of the present invention do not limit this.

[0080] 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, wherein the positive electrode active material layer is coated on the surface of the positive electrode collector, and 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 a positive electrode ear. Taking a lithium-ion battery as an example, the material of the positive electrode collector may be aluminum, and the positive electrode active material may be lithium cobalt oxide, lithium iron phosphate, ternary lithium or lithium manganese oxide, etc.

[0081] The negative electrode sheet includes a negative electrode current collector and a negative electrode active material layer. The negative electrode active material layer is coated on the surface of the negative electrode current collector. The negative electrode current collector not coated with the negative electrode active material layer protrudes from the negative electrode current collector coated with the negative electrode active material layer. The negative electrode current collector not coated with the negative electrode active material layer serves as a negative electrode tab. The material of the negative electrode current collector can be copper, and the negative electrode active material can be carbon or silicon, etc. In order to ensure that a large current passes without melting, the number of positive electrode tabs is multiple and stacked together, and the number of negative electrode tabs is multiple and stacked together.

[0082] The material of the isolation film may be PP (polypropylene) or PE (polyethylene), etc. In addition, the electrode assembly may be a winding structure or a stacked structure, but the embodiment of the present invention is not limited thereto.

[0083] The battery cell may be provided with a pole or the like connected to the pole lug as the electrical connection part of the battery cell. In addition, the battery cell may have a first pressure relief part. When the internal pressure of the battery cell is too high (for example, thermal runaway), the first pressure relief part is used to release the internal substances of the battery cell (for example, gas, liquid, particulate matter, etc.) to reduce the internal pressure of the battery cell and avoid the internal pressure of the battery cell being too quickly pressurized, which may lead to dangerous accidents such as explosion of the battery cell. For example, the first pressure relief part may be an explosion-proof valve, an explosion-proof plate, etc.

[0084] For example, when a battery experiences thermal runaway, it will release a large amount of high-temperature flammable solid eruptions and smoke. Some related technologies do not have sufficient thermal insulation protection, exhaust space and external exhaust devices. The solid eruptions may cause high-voltage short circuit ignition, and the temperature inside the battery will rise rapidly. A large amount of heat will be transferred to the surrounding battery cells. When the temperature exceeds the threshold, it will cause thermal runaway of the surrounding battery cells, causing a chain reaction and leading to the battery cell fire.

[0085] In some related technologies, the direction of solid ejecta and smoke ejection 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, and 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.

[0086] Based on this, the present application proposes a box body 100 of a battery 1000, which includes a box body 10 and a first guide member 21. The box body 10 defines a receiving cavity 101 and a heat dissipation channel 102, the receiving cavity 101 is used to receive a battery cell 200 of the battery 1000, and the cavity wall of the receiving cavity 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, and 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 receiving 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.

[0087] In the box body 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 separated from the battery cell 200 and the high-voltage circuit in time, and the temperature of the emissions can be reduced, thereby reducing the risk of thermal runaway caused by increased temperatures of the surrounding battery 1000 units and the high-voltage circuit.

[0088] The battery 1000 disclosed in the embodiment of the present invention can be used in, but not limited to, an electrical device 2000 such as a vehicle, a ship or an aircraft. The power system of the electrical device 2000 composed of the battery 1000 disclosed in the present invention can be used to reduce the risk of thermal runaway of the electrical device 2000.

[0089] For example, the power-consuming device 2000 disclosed in the embodiment of the present invention 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. The vehicle may be a fuel vehicle, a gas vehicle, a new energy vehicle, or a rail vehicle, and the new energy vehicle may be a pure electric vehicle, a hybrid vehicle, or an extended-range vehicle, etc.; the spacecraft includes an airplane, a rocket, a space shuttle, and a spacecraft, etc.; the 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.; the 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.

[0090] Hereinafter, with reference to the accompanying drawings, a case 100 of a battery 1000 according to an embodiment of the present invention will be described.

[0091] Please refer to Figure 1-Figure 6 As shown, Figure 1 A bottom view of a battery 1000 provided for some embodiments of the present invention; Figure 2 for Figure 1 A partial structural diagram of FIG. 1 , wherein the first cover plate 13 and the partition plate 12 are not shown; Figure 3 for Figure 1 Exploded diagram of some structures; Figure 4 for Figure 3 The middle circle shows the enlarged structural schematic diagram of B; Figure 5 for Figure 1 A cross-sectional view along the direction indicated by line AA; Figure 6 for Figure 5 The middle circle shows an enlarged structural diagram of C. The box body 100 of the battery 1000 includes a box body 10 and a first guide member 21 .

[0092] Specifically, the box body 10 defines a receiving cavity 101 and a heat dissipation channel 102. The receiving cavity 101 is used to receive the battery cell 200 of the battery 1000. The cavity wall of the receiving cavity 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 receiving 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.

[0093] The box body 10 is used to provide a storage space for the battery cell 200, and the box body 10 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, the cover plate is a plate-shaped structure or the cover plate is also a hollow structure with an opening on one side, and the hollow structure can be an integrally formed one-piece, or it can be a spliced ​​piece formed by splicing at least one of the structures such as a plate body, a beam, etc. The box body 10 can be in a variety of shapes, such as a cylinder, a cuboid, etc.

[0094] The accommodating cavity 101 may be an integrated complete cavity, or may include a plurality of sub-cavities separated by partitions.

[0095] 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. It only needs to enable solid ejecta and emissions such as smoke 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.

[0096] There may be one or more battery cells 200, wherein the multiple battery cells 200 may be connected in series, in parallel or in a hybrid connection. A hybrid connection means that the multiple battery cells 200 are both connected in series and in parallel. The multiple battery cells 200 may be directly connected in series, in parallel or in a hybrid connection, and then the whole formed by the multiple battery cells 200 is accommodated in the accommodation cavity 101; of course, the multiple battery cells 200 may be connected in series, in parallel or in a hybrid connection to form a module, and then the multiple modules are connected in series, in parallel or in a hybrid connection to form a whole, and accommodated in the accommodation cavity 101. Other structures may also be provided in the accommodation cavity 101, such as an electrical connection structure formed by a busbar assembly, etc., for realizing electrical connection between the multiple battery cells 200.

[0097] 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 .

[0098] 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, a broken line, etc.

[0099] It should be noted that in the 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, and 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 of these multiple first pressure relief portions 210 can all be guided through the same first guide channel 211, or a part of the first pressure relief portions 210 cooperate with the first guide channel 211 and another part of the first pressure relief portions 210 is connected to the accommodating chamber 101 to discharge the emissions into the accommodating chamber 101, and then discharged from the accommodating chamber 101 to the heat dissipation channel 102 or other areas.

[0100] 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 form includes but is not limited to adhesive sealing, abutment sealing, etc.

[0101] In other words, the emissions discharged when the battery cell 200 corresponding to the first guide member 21 has thermal runaway can only enter the first guide channel 211 of the first guide member 21, and 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, so as to facilitate the emission to be directed to a specific area through the heat dissipation channel 102. The specific area can refer to the outside of the box body 100 or the area inside the box body 100, thereby achieving the isolation of the emissions and the restriction of their flow direction, and being able to discharge the emissions more timely and efficiently. Due to the sealing cooperation between the first guide member 21 and the battery cell 200, it is not easy for the emissions to enter the accommodating cavity 101 through the gap between the first guide member 21 and the battery cell 200, and then the high temperature of the emissions is not easy to act on other battery cells 200, so that the emissions are isolated from other battery cells 200, and it is not easy to cause secondary damage to the battery cell 200, thereby reducing the risk of thermal runaway of 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, so as to reduce the temperature of the exhaust gas discharged to a specific area.

[0102] According to the case 100 of the battery 1000 of the embodiment of the present invention, 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 time, and the temperature of the emissions can be reduced, thereby reducing the risk of thermal runaway caused by increased temperatures of the surrounding battery 1000 units and the high-voltage circuit.

[0103] In some embodiments, please refer to Figure 3-Figure 6 The first guide member 21 is an elastic member, and the elastic member stops between the battery cell 200 and the cavity wall of the accommodating cavity 101.

[0104] An elastic part refers to a part made of a material that can be deformed 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.

[0105] The above characteristics of the elastic member enable it to stop between the battery cell 200 and the cavity wall of the accommodating cavity 101, and one end surface of the elastic member (for example Figure 6 The upper end surface shown in the figure) can be closely matched with the battery cell 200 to improve the sealing effect, and the discharge discharged by the first pressure relief portion 210 is not easy to leak between the elastic member and the battery cell 200; and the other end surface of the elastic member (for example Figure 6 The lower end surface shown in the figure can be closely matched with the cavity wall of the accommodating cavity 101 to improve the sealing effect, and the discharge in the first guide channel 211 is not easy to leak between the elastic member and the cavity wall of the accommodating cavity 101.

[0106] In some embodiments of the present invention, please refer to Figure 3-Figure 6 There are multiple first guide channels 211 and multiple heat dissipation inlets 103, and the multiple first guide channels 211 are connected to the first pressure relief parts 210 and the heat dissipation inlets 103 one by one. In other words, each first pressure relief part 210 is connected to a heat dissipation inlet 103 through a first guide channel 211.

[0107] 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.

[0108] 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 .

[0109] The specific structure of the box body 10 according to some embodiments of the present invention will be described below with reference to the accompanying drawings.

[0110] Please refer to Figure 3-Figure 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.

[0111] The side frame 11 is provided with a first channel 104, the periphery of the partition plate 12 is connected to the side frame 11 to cooperate with the side frame 11 to define a receiving cavity 101, and the partition plate 12 is provided with a heat dissipation inlet 103. A second channel 105 is defined between the first cover plate 13 and the partition plate 12, and the second channel 105 and the receiving cavity 101 are respectively located on both sides of the partition plate 12.

[0112] The side frame 11 is a closed frame structure with both ends open along the centerline direction, and can be, for example, a circular frame, a square frame, a polygonal frame, etc. The side frame 11 can be an integral piece and can be formed by connecting a plurality of 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 structures such as plates and beams.

[0113] 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.).

[0114] 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.).

[0115] The periphery of the partition plate 12 is connected to the side enclosure frame 11 to cooperate with the side enclosure frame 11 to define a receiving cavity 101, that is, the partition plate 12 covers an open end of the space enclosed by the side enclosure frame 11, so that the space enclosed by the side enclosure frame 11 forms an receiving cavity 101 for receiving the battery cell 200. The partition plate 12 is provided with a heat dissipation inlet 103, so that the battery cell 200 can be opposite to the heat dissipation inlet 103 when installed in the receiving cavity 101, so as to reduce the path of the first guide channel 211, and discharge the exhaust to the heat dissipation channel 102 in time when thermal runaway occurs.

[0116] 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 chamber 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 chamber 101 in time by the partition plate 12, thereby reducing the impact of the high temperature of the emissions on the battery cells 200.

[0117] It should be noted that the first cover plate 13 can be connected to the partition plate 12 to achieve installation, the first cover plate 13 can also be connected to the side frame 11 to achieve installation, and the first cover plate 13 can also be connected to the side frame 11 to achieve installation. Figure 6 The fasteners shown are sequentially passed through the first cover plate 13, the partition plate 12 and the side frame 11 to achieve the connection between the three, which is within the protection scope of the present invention.

[0118] In some specific embodiments, please refer to Figure 5 and Figure 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 arranged along the third direction F3 (such as Figure 5 The first cover plate 13 and the side frame 11 can be used to install and position the partition plate 12, and the partition plate 12 can improve the partition effect of the accommodating cavity 101 and the second channel 105.

[0119] In addition, a connecting port 121 is provided on the periphery of the partition plate 12 to connect the second channel 105 and the first channel 104. The connecting port 121 is an opening that penetrates the partition plate 12 along the third direction F3, so that the exhaust in the second channel 105 located on one side of the partition plate 12 can flow through the connecting port 121 into the first channel 104, and the partition plate 12 is not likely to interfere with the flow of the exhaust in the heat dissipation channel 102.

[0120] The communication opening 121 may be one or more. The communication opening 121 may be a circular hole, an elliptical hole, a round hole, a long strip hole, etc. The multiple communication openings 121 may be arranged at intervals along the periphery of the partition plate 12, which not only increases the communication area between the first channel 104 and the second channel 105, but also allows the communication openings 121 in other areas to be used for discharge when the communication opening 121 in one area cannot discharge the emissions in time, thereby improving the discharge efficiency of the emissions, and facilitating the emissions from different areas in the second channel 105 to flow into the first channel 104 in time.

[0121] In some embodiments, please refer to Figure 4-Figure 6 A second guide member 22 is provided between the periphery of the partition plate 12 and the side frame 11. The second guide member 22 defines a second guide channel 221, and both ends of the second guide member 22 are respectively sealed with the partition plate 12 and the side frame 11, so that the second guide channel 221 is connected to the communication port 121 and the first channel 104.

[0122] The second guide channel 221 of the second guide member 22 can limit the flow path of the exhaust, so that the exhaust flowing out of the connecting port 121 is not easy to leak into the accommodating cavity 101 from between the partition plate 12 and the side frame 11, thereby reducing the interference with the battery cell 200 and the high-voltage circuit in the accommodating cavity 101.

[0123] 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 member 22 may be provided with a second guide channel 221, or may be provided with a plurality of second guide channels 221. Each second guide channel 221 may correspond to one communication port 121, or may correspond to a plurality of communication ports 121.

[0124] According to some embodiments of the present invention, please refer to Figure 6 A one-way valve 40 may be provided at the heat dissipation inlet 103, and the one-way valve 40 is one-way in the direction from the accommodating chamber 101 to the heat dissipation channel 102. By providing the one-way valve 40, the emissions discharged from the first pressure relief portion 210 can only flow into the heat dissipation channel 102 from the heat dissipation inlet 103, while the emissions in the heat dissipation channel 102 cannot flow back to the battery cell 200 from the heat dissipation inlet 103, which can further improve the heat dissipation effect and reduce the impact of high-temperature emissions on the battery cell 200 and the high-voltage circuit.

[0125] The specific structure of the one-way valve 40 is not limited, for example Figure 6As shown, the one-way valve 40 is a blocking piece, and the blocking piece is located on the side of the partition plate 12 facing away from the first guide member 21. In a state where thermal runaway does not occur, the periphery of the blocking piece fits with the periphery of the heat dissipation inlet 103 to block the heat dissipation inlet 103; in a state where thermal runaway occurs, the first pressure relief portion 210 discharges the emissions, and the high pressure of the emissions pushes the blocking piece open, so that at least part of the periphery of the blocking piece is separated from the partition plate 12 to form a gap to open the heat dissipation inlet 103, and the emissions 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 piece 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 unidirectionally guide the heat dissipation inlet 103.

[0126] The specific structure of the first channel 104 according to some embodiments of the present invention is described below with reference to the accompanying drawings.

[0127] Please refer to Figure 5-Figure 10 , Figure 7 A left side view of a battery 1000 provided in some embodiments of the present invention, Figure 8 for Figure 7 The cross-sectional view along the DD line is as follows: Fig. 9 for Figure 8 The cross-sectional view along the EE line is as follows: Fig.10 for Fig. 9 The middle circle shows an enlarged structural schematic diagram of H. In some embodiments of the present invention, 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 is connected to the second channel 105, and the remaining sub-channels 106 are connected to the second channel 105 or through the sub-channel 106 closest to the accommodating cavity 101.

[0128] The direction away from the accommodation cavity 101 can be Figure 5 and Figure 6 The second direction F2 shown is, for example, the left-right direction. The multi-layer sub-channels 106 are stacked along the second direction F2, and the multi-layer may be two or more layers. The sub-channel 106 closest to the accommodating cavity 101 refers to the sub-channel 106 with the smallest distance from the accommodating cavity 101 among the stacked multi-layer sub-channels 106, for example, among the multi-layer sub-channels 106 of the first channel 104 located on the left side of the accommodating cavity 101, the sub-channel 106 located on the far right is the sub-channel 106 closest to the accommodating cavity 101.

[0129] At least part 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 is connected to the second channel 105, and the remaining sub-channels 106 are connected to the second channel 105. In other words, multiple sub-channels 106 are respectively connected to the second channel 105, so that the exhaust discharged from the second channel 105 can enter the multiple sub-channels 106 respectively, which can increase the flow path of the exhaust. The partition structure between the two layers of sub-channels 106 is used to separate the high-temperature exhaust of the remaining sub-channels 106 from the accommodating cavity 101, so as to further reduce the impact on the battery cells 200 and the high-voltage circuit in the accommodating cavity 101.

[0130] 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, thereby, the flow path of the exhaust in the first channel 104 is longer, which is conducive to reducing the temperature of the exhaust discharged from the heat dissipation channel 102.

[0131] In some embodiments including multiple layers of subchannels 106, see Figure 6 and Fig.10 Two adjacent sub-channels 106 are connected through 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 11 .

[0132] For example, the side frame 11 may include two first side beams 111 opposite to each other along a first direction F1 (such as a front-to-rear direction) and two second side beams 112 opposite to each other along a second direction F2 (such as a left-to-right direction), the length direction of the first side beam 111 extends along the second direction F2, the length direction of the second side beam 112 extends along the first direction F1, and the first direction F1 intersects with the second direction F2 (including but not limited to being perpendicular). The multiple first through holes provided in the first side beam 111 may be arranged at intervals along the second direction F2, and the multiple first through holes provided in the second side beam 112 may be arranged at intervals along the first direction F1.

[0133] By connecting two adjacent sub-channels 106 through a plurality of 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 to improve 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 another 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.

[0134] In some embodiments including multiple layers of subchannels 106, see Figure 6and Fig.10 The same sub-channel 106 may include a plurality of sub-chambers 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 .

[0135] The direction away from the partition plate 12 can be Figure 5 and Figure 6 The third direction F3 shown. At least part of the area between two adjacent layers of sub-chambers 108 is separated by a partition structure and connected through a plurality of second through holes 109. On the one hand, the partition structure can be used to improve the structural strength of the side frame 11, and on the other hand, the exhaust in one sub-chamber 108 can flow more evenly along the length direction of the sub-chamber 108 and flow from multiple locations to another sub-chamber 108, thereby improving the flow efficiency of the exhaust between the two sub-chambers 108, and at the same time increasing the flow path of the exhaust in the sub-channel 106, thereby improving the cooling effect.

[0136] 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 in the length direction of the first channel 104 , or may be arranged in a staggered manner.

[0137] In some embodiments of the present invention, 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 exhaust efficiency.

[0138] Please refer to Figure 8-Figure 16 ,in, Fig.11 for Figure 8 The cross-sectional view along the direction indicated by line FF, Fig.12 for Fig.11 The middle circle shows the enlarged structural diagram of J. Fig.13 for Figure 8 The cross-sectional view along the GG line is shown in the following figure. Fig.14 A top view of the first cover plate 13 provided in some embodiments of the present invention, Fig.15 A schematic diagram of the structure of the first cover plate 13 provided in some embodiments of the present invention, Fig.16 for Fig.15 The enlarged structural diagram of the circle K is shown in the middle. In some embodiments, a plurality of flow guides 30 are disposed in the second channel 105, and the plurality of flow guides 30 are arranged at intervals along the first direction F1, and the flow guides 30 extend along the second direction F2. The inlet of the first channel 104 is disposed at the end of the first channel 104 along the second direction F2, and the outlet of the first channel 104 is disposed at the end of the first channel 104 along the second direction F2 or the end of the first channel 104 along the first direction F1, and the first direction F1 intersects with the second direction F2.

[0139] The guide member 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 guide member 30. For example, the guide member 30 can be a sheet (such as a fin), a strip block, or the like.

[0140] A plurality of guide members 30 are arranged at intervals along the first direction F1, and the guide members 30 extend along the second direction F2, so that a portion of the second channel 105 located between two adjacent guide members 30 can form a guide channel. The inlet of the first channel 104 is provided at the end (one end or both ends) of the first channel 104 along the second direction F2, and the exhaust can flow along the guide channel along the second direction F2 to flow to the inlet of the first channel 104 as quickly as possible and enter the first channel 104 more quickly, which is conducive to improving the heat dissipation efficiency.

[0141] The material of the guide member 30 can be flexibly set. For example, it can be a heat-insulating material to reduce the heat transfer between adjacent guide channels; for another example, the guide member 30 can be a heat-dissipating material to form a larger heat transfer area with the first cover plate 13, thereby improving the efficiency of heat transfer to the first cover plate 13 and improving the heat dissipation effect. For example, the heat-conducting member can be a metal sheet.

[0142] In addition, the outlet of the first channel 104 is arranged 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, so as to reduce the length of the first channel 104, so that the exhaust in the first channel 104 can be quickly discharged to the outside of the box 100, thereby reducing the impact on the battery cells 200 and the high-voltage circuit in the box 100. Alternatively, the outlet of the first channel 104 can be arranged 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 the adjacent sides of the second channel 105, so as to increase the length of the first channel 104, so that the exhaust can be fully cooled in the first channel 104, thereby reducing the temperature of the exhaust discharged from the heat dissipation channel 102, and reducing the harm to the surrounding personnel.

[0143] In some embodiments, please refer to Figure 9-10 and Figure 15-16 The plurality of guide members 30 include a first guide member 31 opposite to the battery cell 200. At least one first guide member 31 includes a first guide portion 311. Two first guide portions 311 adjacent to each other along the first direction F1 correspond to the same battery cell 200 and are respectively located on both sides of the heat dissipation inlet 103. The first guide portion 311 abuts against the partition plate 12.

[0144] 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 .

[0145] Among all the first flow guide members 31, each of the first flow guide members 31 may include the first flow guide portion 311, or some of the first flow guide members 31 may include the first flow guide portion 311. Fig.15 and Fig.16 In the illustrated example, the first air guide members 31 including the first air guide portion 311 and the first air guide members 31 not including the first air guide portion 311 are alternately arranged along the first direction F1 .

[0146] The two adjacent first guides 311 along the first direction F1 correspond to the same battery cell 200 and are respectively located on both sides of the heat dissipation inlet 103. The first guide 311 abuts against the partition plate 12, so that the emissions entering the second channel 105 from the heat dissipation inlet 103 can enter between the two adjacent first guides 311. The first guide 311 abuts against the partition plate 12 to limit the flow direction of the emissions, so that the emissions can flow along the first guide 311 along the second direction F2, so as to flow to the first channel 104 more quickly to improve the heat dissipation efficiency. At the same time, the first guide 311 abuts against the partition plate 12, which can support the partition plate 12, improve the stability of the partition plate 12, and further improve the support stability of the partition plate 12 for the battery cell 200.

[0147] In some embodiments, please refer to Figure 11-Figure 12 and Figure 15-16 At least one guide member 30 includes a second guide portion 312 . The second guide portions 312 adjacent to the first guide portions 311 along the second direction F2 are located on both sides of the heat dissipation inlet 103 and correspond to the battery cells 200 . The second guide portions 312 abut against the partition plate 12 .

[0148] The second guide portion 312 can support the partition plate 12 from both sides of the heat dissipation inlet 103 along the second direction F2, thereby further improving the stability of the partition plate 12, and further improving the supporting stability of the partition plate 12 for the battery cell 200. Fig.16 As shown, the projection of each second guide portion 312 along the third direction F3 can coincide with the projection of two battery cells 200, that is, the second guide portion 312 is opposite to the shoulders of the two battery cells 200 and provides support; the same battery cell 200 is correspondingly arranged with six second guide portions 312, and the three second guide portions 312 located on the same side of the heat dissipation inlet 103 are arranged along the first direction F1.

[0149] In some specific embodiments, please continue to refer to Figure 9-12 and Figure 15-16 The guide member 30 further includes a third guide portion 313. The third guide portion 313 and the second guide portion 312 in the same guide member 30 are arranged along the second direction F2 and connected, and the protruding height of the third guide portion 313 is smaller than that of the second guide portion 312.

[0150] Thus, a certain gap can be formed between the third guide part 313 and the partition plate 12. When there is too much discharge between two adjacent first guide members 31, the discharge can not only Fig.16 As shown by the arrow a, the exhaust gas flows along the guide channel in the second direction F2, and can also flow along the second direction F2 by passing through the third guide portion 313 and using the adjacent guide channel as shown by the arrow B, so as to improve the exhaust efficiency and heat dissipation efficiency. The third guide portion 313 is provided to extend the exhaust gas flow path, which can effectively reduce the temperature.

[0151] In some specific embodiments, Fig.15 and Fig.16 As shown, among the multiple first guide members 31, the first guide part 311, the second guide part 312 and the third guide part 313 are arranged at the same position along the second direction F2, so that the multiple first guide parts 311 are arranged in a row along the first direction F1, the multiple second guide parts 312 are arranged in a row along the first direction F1, and the multiple third guide parts 313 are arranged in a row along the first direction F1. Among them, each battery cell 200 corresponds to three first guide members 31, and the first guide member 31 located in the middle of the three first guide members 31 does not include the first guide part 311, so that the space of the area opposite to the heat dissipation inlet 103 is large enough to improve the efficiency of the exhaust entering the second channel 105; the first guide members 31 located at both ends include the first guide part 311, the second guide part 312 and the third guide part 313, so as to improve the guiding effect.

[0152] According to some embodiments of the present invention, please refer to Figure 14-16 The plurality of flow guides 30 further include a second flow guide 32, which is opposite to the electrical connection structure of the battery 1000. In other words, a projection of the second flow guide 32 along the third direction F3 at least partially overlaps with a projection of the electrical connection structure.

[0153] 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.

[0154] In some embodiments of the present invention, the materials of the partition plate 12 and the first cover plate 13 can be flexibly set according to actual needs.

[0155] For example, the partition plate 12 may be a heat insulating plate, which is a plate made of heat insulating material. Heat insulating material is also called thermal insulation material, which refers to a material that can reduce or block heat flow transfer, such as but not limited to glass fiber, asbestos, mica, etc. The heat insulating plate can reduce the heat transfer of high-temperature exhaust in the second channel 105 to the accommodating cavity 101, thereby reducing the impact on the battery cell 200 and the high-voltage circuit in the accommodating cavity 101.

[0156] For example, the first cover plate 13 may be a heat sink, which is a plate made of a heat conductive material, wherein the heat conductive material refers to a material with low thermal resistance, such as 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 the high-temperature exhaust in the second channel 105 to the outside of the box 100, thereby reducing the heat dissipation efficiency.

[0157] In some embodiments of the present invention, at least a portion of the heat dissipation channel 102 is provided with an adsorption material layer. For example, in some embodiments where the heat dissipation channel 102 includes a first channel 104 and a second channel 105, only at least a portion of the first channel 104 may be provided with an adsorption material layer, only at least a portion of the second channel 105 may be provided with an adsorption material layer, or at least a portion of the first channel 104 and at least a portion of the second channel 105 may be provided with an adsorption material layer.

[0158] The adsorption material layer refers to a material layer attached to the channel surface of the heat dissipation channel 102, which can adsorb the 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, molecular sieves, etc. The adsorption material usually has a large specific surface area, a suitable pore structure and surface structure, has a strong adsorption capacity for the adsorbate, and generally does not produce a chemical reaction with the adsorbate and the medium.

[0159] By providing an adsorption material layer, harmful substances such as smoke in the emission 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 smoke-free emission effect.

[0160] According to some embodiments of the present invention, please refer to Figure 3 and Figure 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 the material inside the heat dissipation channel 102 when the pressure inside the heat dissipation channel 102 is too high. The second pressure relief portion 50 may be an explosion-proof valve or an explosion-proof disk. By providing the second pressure relief portion 50, the discharge material inside the heat dissipation channel 102 can be discharged smoothly, and the heat dissipation outlet of the heat dissipation channel 102 can be closed when there is no thermal runaway.

[0161] In some embodiments of the present invention, the box body 10 can be a component installed separately 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.

[0162] For example, according to some embodiments of the present invention, please refer to Figure 1-Figure 3 and Fig.17 , Fig.17 The schematic diagram of the structure of the side frame 11 provided in some embodiments of the present invention. The box body 10 includes two first side beams 111 opposite to each other along a first direction F1 and two second side beams 112 opposite to each other along a second direction F2, the first side beam 111 is a rear cross beam of the front frame 300 or a front cross beam of the rear frame 400, the second side beam 112 is a door sill beam, and the first direction F1 intersects with the second direction F2.

[0163] The door sill beam is one of the important protective parts of the vehicle. It can effectively resist external impact in the side collision of the vehicle, thereby protecting the integrity of the passenger compartment and reducing the degree of injury to the vehicle occupants.

[0164] In other words, the traditional mounting beam is 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 beam, increases the available space of the accommodating cavity 101 for installing the battery cell 200 and the heat dissipation channel 102 for heat dissipation in the box body 100, improves the space utilization rate, and further can increase the battery 1000 The installed power and heat dissipation effect are beneficial to the improvement of the energy of the entire vehicle.

[0165] In some embodiments of the present invention, please refer to Figure 5 The box body 100 further includes a second cover plate 14, the periphery of which is connected to the box body 10 to cover the top opening of the accommodating cavity 101. This is conducive to forming the accommodating cavity 101 into a closed cavity, thereby improving the stability of the battery 1000 in operation.

[0166] The second cover plate 14 may be an independent plate disposed 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.

[0167] Alternatively, the second cover plate 14 may be a front floor. The front floor refers to a component on a vehicle that is used to bear loads such as stepping on and seat bearing. Using the front floor as the second cover plate 14 can not only achieve sealing of the battery 1000, but also reduce the number of components, thereby improving the space utilization in the height direction, thereby increasing the amount of electricity that can be installed in the battery 1000, and is conducive to improving the energy of the entire vehicle.

[0168] Please refer to Figure 1-Figure 3 The battery 1000 according to the second embodiment of the present invention comprises a battery cell 200 and a case 100 of the battery 1000 according to the first embodiment of the present invention, wherein the battery cell 200 is disposed in the case 100. Thus, by adopting the above-mentioned case 100, the high-temperature emissions emitted when the battery cell 200 has thermal runaway can be separated from the battery cell 200 and the high-voltage circuit in time, and the temperature of the emissions can be reduced, thereby reducing the risk of thermal runaway caused by the increase in temperature of the surrounding battery 1000 units and the high-voltage circuit.

[0169] Please refer to Fig.18 , the electric device 2000 according to the third embodiment of the present invention comprises the battery 1000 according to the second embodiment of the present invention, and the battery 1000 is used to provide electric energy for the electric device 2000. Therefore, by adopting the above-mentioned battery 1000, the high-temperature emissions emitted when the battery cell 200 has thermal runaway can be separated from the battery cell 200 and the high-voltage circuit in time, and the temperature of the emissions is reduced, thereby reducing the risk of thermal runaway caused by the increase in temperature of the surrounding battery 1000 units and the high-voltage circuit.

[0170] Alternatively, if Fig.18 The figure shows a schematic diagram of the structure of the power device 2000 provided in some embodiments of the present invention. When the power device 2000 is a vehicle, the battery 1000 can be arranged at the bottom, head, or tail of the vehicle. The battery 1000 can be used to power the vehicle, for example, the battery 1000 can be used as an operating power source for the vehicle. The vehicle can also include a controller and a motor, and the controller is used to control the battery 1000 to power the motor, for example, for starting, navigating, and driving the vehicle.

[0171] In some embodiments in which the battery 1000 is disposed at the bottom of the vehicle, the box 100 of the battery 1000 may be connected to the frame of the vehicle, or the box 100 includes components such as the vehicle's door sill 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 components and increase the space of the battery 1000 for installing the battery cells 200.

[0172] A battery 1000 and a vehicle having the same according to a specific embodiment of the present invention will be described below with reference to the accompanying drawings.

[0173] Please refer to Figure 1-Figure 18The battery 1000 includes a box body 100 and a plurality of battery cells 200. The box body 100 includes a box body 10, a first guide 21, a second guide 22, a flow guide 30, a one-way valve 40 and a second pressure relief portion 50. The box body 10 includes a side frame 11, a partition plate 12, a first cover plate 13 and a second cover plate 14. The rear cross beam of the front frame 300 of the vehicle, the front cross beam of the rear frame 400 and two door sill beams are connected end to end to form the side frame 11. The front floor of the vehicle serves as the second cover plate 14 to cover the top opening of the side frame 11. The partition plate 12 covers the bottom opening of the side frame 11. The first cover plate 13 is arranged on the lower side of the partition plate 12, and a plurality of flow guides 30 are arranged on the side of the first cover plate 13 facing the partition plate 12.

[0174] 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.

[0175] The plurality of battery cells 200 are arranged in a plurality of rows along the first direction F1, and each row includes a plurality of battery cells 200 arranged along the second direction F2. The lower end surface of each battery cell 200 is provided with two electrical connection parts 220 and a first pressure relief part 210 located between the two electrical connection parts 220. The heat dissipation inlet 103 on the partition plate 12 is arranged opposite to the first pressure relief part 210, and the first guide member 21 is connected to the first pressure relief part 210 and the heat dissipation inlet 103 in a one-to-one correspondence.

[0176] The fins extend in the left-right direction, and a plurality of fins are arranged at intervals in the front-back direction. The sill beams on the left and right sides are provided with inlets of the first channel 104, and a connecting port 121 is provided on the partition plate 12 at a position opposite to the inlet of the first channel 104. The front cross beam and the rear cross beam on the front and back sides are provided with outlets of the first channel 104, and a second pressure relief portion 50 is provided at the outlets.

[0177] The plurality of fins include a first guide member 31 and a second guide member 32, wherein one type of the first guide member 31 includes a first guide portion 311, a second guide portion 312 and a third guide portion 313, and another type of the first guide member 31 includes a second guide portion 312 and a third guide portion 313. The two first guide portions 311 adjacent to each other in the front-to-back direction are respectively located on both sides 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, which can improve the structural strength; the height of the third guide portion 313 is relatively small. When the exhaust enters the second channel 105, most of it is blocked and intercepted by the first guide portion 311. The rest is effectively intercepted by the second guide portion 312 and the third guide portion 313, and the flue gas can fully exchange heat with the external environment of the battery 1000 through the first cover plate 13 and the plurality of 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.

[0178] When thermal runaway occurs in the battery cell 200, the first pressure relief portion 210 is opened, and the ejected material and smoke of 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 ejected material 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.

[0179] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features in the embodiments may be combined with each other.

[0180] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A battery box, characterized in that: 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 box according to claim 1, characterized in that: 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, characterized in that: 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 box according to any one of claims 1 to 3, characterized in that: 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, characterized in that: 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, characterized in that: 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 box according to any one of claims 4 to 6, characterized in that: 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, characterized in that: 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 box according to any one of claims 4 to 8, characterized in that: 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, characterized in that: 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, characterized in that: 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, characterized in that: 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, characterized in that: 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, characterized in that: 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, characterized in that: 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, characterized in that: 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, characterized in that: 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, characterized in that: 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, characterized in that: 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, characterized in that: 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, characterized in that: 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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