Battery device and electric device

Abstract

The utility model discloses a battery device and a power utilization device, and relates to the technical field of batteries, the battery device comprises a box body, a plurality of battery monomers, a heat exchange mechanism and a communication structure, the box body defines a containing space, the plurality of battery monomers are arranged in the containing space, and the heat exchange mechanism is arranged in the containing space; the heat exchange mechanism abuts against the multiple battery monomers and is in heat exchange fit with at least one battery monomer, the heat exchange runners are used for being in heat exchange fit with the battery monomers and comprise heat exchange media, exhaust ports are formed in the box body, the exhaust channels are used for communicating the exhaust ports with the containing space, and the communication structure is located in the containing space. The exhaust channel communicates with the exhaust port through the communicating structure. According to the battery device provided by the invention, the effect of directionally discharging the thermal runaway gas can be realized, the risk of burning explosion and fire of the battery device can be reduced, the reliability of the battery device can be improved, and the effect of integrated design of a heat dissipation function and an explosion-proof function of the battery device can be realized; and the space utilization rate of the power utilization device is improved.

Description

Technical Field

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

[0002] In the related art, the existing battery device can realize cooling of the battery cells, but when the battery cells fail thermally, the generated high-temperature flammable gas cannot be discharged from the battery device in time, and the reliability of the battery device is low. Utility Model Content

[0003] The present application aims to solve at least one of the technical problems existing in the prior art. To this end, one purpose of the present application is to propose a battery device that can achieve the effect of directional discharge of thermal runaway gas, can reduce the risk of explosion and fire of the battery device, is conducive to improving the reliability of the battery device, can achieve the effect of integrating the heat dissipation function and explosion-proof function of the battery device, and is conducive to improving the space utilization rate of the power-consuming device.

[0004] The present application also provides an electrical device using the battery device.

[0005] In the first aspect, an embodiment of the present application proposes a battery device, comprising: a box body, a plurality of battery cells, a heat exchange mechanism and a connecting structure, the box body defines a accommodating space, a plurality of battery cells are arranged in the accommodating space, the heat exchange mechanism is arranged in the accommodating space, and the heat exchange mechanism abuts against the plurality of battery cells and cooperates with at least one battery cell for heat exchange, the heat exchange mechanism includes a heat exchange flow channel and an exhaust channel, the heat exchange flow channel is used to cooperate with the battery cell for heat exchange, the heat exchange flow channel includes a heat exchange medium, the box body is formed with an exhaust port, the exhaust channel is used to connect the exhaust port and the accommodating space, the connecting structure is located in the accommodating space, and the exhaust channel is connected to the exhaust port through the connecting structure.

[0006] In the above technical solution, the heat exchange mechanism may include a heat exchange flow channel and an exhaust channel. The heat exchange mechanism can cooperate with the battery cell for heat exchange, and can also discharge the high-temperature combustible gas in the battery device out of the battery device. The connecting structure can play a role of diversion and connection. The gas or particulate matter in the exhaust channel can flow to the exhaust port through the connecting structure and be discharged from the battery device from the exhaust port, which can achieve the effect of directional discharge of thermal runaway gas, thereby reducing the risk of combustion, explosion and fire of the battery device, which is beneficial to improving the reliability of the battery device, and can achieve the effect of integrated design of the heat dissipation function and explosion-proof function of the battery device. The battery device has a high degree of integration and occupies a small space, which is beneficial to improving the space utilization rate of the electrical device.

[0007] In some embodiments, the heat exchange channel and the exhaust channel are not connected.

[0008] The above technical solution is beneficial to improving the reliability of the heat exchange mechanism.

[0009] In some embodiments, the exhaust port is provided with a first explosion-proof structure.

[0010] In the above technical solution, by setting the first explosion-proof structure, the effect of automatically discharging gas when the exhaust channel is filled with high-temperature combustible gas can be achieved, and the pressure of the battery device can be released in time, which is beneficial to improving the reliability of the battery device.

[0011] In some embodiments, the box body has a side frame, and the side frame is formed with an exhaust port.

[0012] In the above technical solution, by arranging the exhaust port on the side frame of the battery device, it is convenient for the substances in the battery device to be discharged from the exhaust channel, so that the exhaust port is reasonably arranged.

[0013] In some embodiments, the communication structure is a communication pipe.

[0014] In the above technical solution, by setting the connecting structure as a connecting pipe, the effect of quickly discharging the gas in the exhaust channel can be achieved, and the connecting pipe has a simple structure, which is conducive to reducing costs.

[0015] In some embodiments, the connecting tube is configured as a bent tube.

[0016] In the above technical solution, by constructing the connecting tube as a bent tube, the probability of conflict between the connecting tube and other structures in the battery device can be reduced, and the connecting tube can be better arranged.

[0017] In some embodiments, the heat exchange mechanism is formed with a connecting portion, and the connecting portion is used to connect the accommodating space and the exhaust channel.

[0018] In the above technical solution, by providing a connecting part, the effect of connecting the storage space and the exhaust channel can be achieved. When high-temperature combustible gas is generated in the storage space, the high-temperature combustible gas can flow from the storage space into the exhaust channel through the connecting part, thereby reducing the risk of high-temperature combustible gas accumulating in the storage space and causing the box to deform or rupture due to excessive pressure, which is beneficial to improving the reliability of the battery device and extending the service life of the battery device.

[0019] In some embodiments, the heat exchange mechanism is formed with an exhaust hole, and the exhaust hole is configured as a connecting portion.

[0020] In the above technical solution, by providing the exhaust holes, the high-temperature combustible gas generated by the battery cells in the accommodation space can enter the exhaust channel through the exhaust holes.

[0021] In some embodiments, the heat exchange mechanism is formed with an explosion-proof portion, which is configured to connect the accommodating space and the exhaust channel when the pressure in the accommodating space reaches a preset pressure value, and the explosion-proof portion is constructed as a connecting portion.

[0022] In the above technical solution, by setting up an explosion-proof part, when the high-temperature combustible gas generated by the battery cell in the accommodation space makes the pressure in the accommodation space reach a preset pressure value, the explosion-proof part can connect the accommodation space and the exhaust channel, and the high-temperature combustible gas can enter the exhaust channel through the explosion-proof part.

[0023] In some embodiments, each battery cell has a second explosion-proof structure, and the connecting portion is disposed opposite to the second explosion-proof structure of at least one battery cell.

[0024] In the above technical solution, by providing each battery cell with a second explosion-proof structure, the battery cell can be selectively opened. When the pressure inside the battery cell increases and gas needs to be released to reduce the pressure, the second explosion-proof structure opens. The gas generated when the battery cell is thermally runaway can be discharged from the battery cell through the second explosion-proof structure, which can facilitate the gas to enter the exhaust channel through the corresponding connecting part.

[0025] In some embodiments, there are multiple connecting parts, and the second explosion-proof structure of each battery cell is arranged opposite to at least one connecting part.

[0026] In the above technical solution, by providing a plurality of connecting parts, the exhaust rate of the battery cell can be further increased, and the reliability of the battery device can be further improved.

[0027] In some embodiments, along the first direction, the heat exchange mechanism is located on the same side of the plurality of battery cells, and the end surface of each battery cell provided with the second explosion-proof structure is arranged opposite to the heat exchange mechanism.

[0028] In the above technical solution, by arranging the end faces of each battery cell provided with the second explosion-proof structure to be arranged opposite to the heat exchange mechanism, it can be achieved that when the second explosion-proof structure is activated due to an abnormal increase in the internal pressure of the battery cell, the exhausted high-temperature combustible gas can directly flow into the exhaust channel of the heat exchange mechanism, and the exhausted heat can be directly absorbed by the heat exchange mechanism, which can not only reduce the temperature of the exhaust gas and reduce the thermal hazard to the surrounding environment, but also reduce the risk of accumulation of high-temperature combustible gas inside the battery cell, further reduce the risk of failure of other battery cells due to thermal runaway of a battery cell, and enhance the reliability of the entire battery device.

[0029] In some embodiments, a plurality of battery cells form at least one column of battery columns, a plurality of battery cells in each column of battery columns are arranged sequentially along a second direction, the first direction and the second direction are perpendicular, the exhaust channel has at least one sub-exhaust channel extending along the second direction, the sub-exhaust channel and the plurality of battery cells in the corresponding battery column are arranged relative to each other, a plurality of connecting parts form at least one column of connecting parts, a plurality of connecting parts in each column of connecting parts are arranged sequentially along the second direction, and along the first direction, each sub-exhaust channel is arranged corresponding to at least one column of connecting parts.

[0030] In the above technical solution, the high-temperature combustible gas generated by each battery cell can be discharged to the sub-exhaust channel through the corresponding connecting part, which can reduce the probability of the sub-exhaust channel being unused and is conducive to improving the utilization rate of the exhaust channel.

[0031] In some embodiments, a plurality of battery cells form a plurality of battery columns, which are arranged sequentially along a third direction, the exhaust channel has a plurality of sub-exhaust channels, which are arranged sequentially along the third direction, the plurality of sub-exhaust channels correspond one-to-one to the plurality of battery columns, a plurality of connecting portions form a plurality of connecting portion columns, the plurality of connecting portion columns correspond one-to-one to the plurality of sub-exhaust channels, and the first direction, the second direction and the third direction are perpendicular to each other.

[0032] In the above technical solution, each battery column, each connecting portion column and each sub-exhaust channel can be arranged correspondingly along the first direction, and the high-temperature combustible gas generated by each battery cell can be discharged to the corresponding sub-exhaust channel through the corresponding connecting portion, so as to achieve directional discharge of gas in each battery cell, reduce the probability of high-temperature combustible gas escaping in the accommodation space, and reduce the probability of failed battery cells affecting other normally operating battery cells, which is beneficial to improving the stability and reliability of the battery device.

[0033] In some embodiments, the exhaust channel further has a confluence channel, the confluence channel extends along a third direction, a plurality of sub-exhaust channels are all connected to the confluence channel, and the confluence channel is used to connect to the exhaust port.

[0034] In the above technical solution, a plurality of sub-exhaust channels can be connected by providing a converging channel, and the converging channel is connected to the exhaust port, so that the gas in the plurality of sub-exhaust channels can be discharged through the exhaust port.

[0035] In some embodiments, along the first direction, the heat exchange mechanism is located on the same side of multiple battery cells, the heat exchange channel includes multiple sub-heat exchange channels, the sub-heat exchange channels extend along the second direction, and the multiple sub-heat exchange channels are arranged in sequence along the third direction. Any two adjacent sub-heat exchange channels are bent and connected and communicated, the exhaust channel has at least one sub-exhaust channel extending along the second direction, and a sub-exhaust channel is provided between at least two adjacent sub-heat exchange channels, and the first direction, the second direction and the third direction are perpendicular to each other.

[0036] In the above technical solution, by providing a heat exchange channel including a plurality of sub-heat exchange channels, the heat exchange coordination effect of the heat exchange mechanism and a plurality of battery cells can be achieved, thereby achieving the effect of the heat exchange mechanism both regulating the temperature and exhausting the battery cells.

[0037] In some embodiments, each battery cell has a second explosion-proof structure. Along the first direction, the heat exchange mechanism is located on the same side of the multiple battery cells. The end face of each battery cell provided with the second explosion-proof structure is arranged opposite to the heat exchange mechanism, and the heat exchange flow channel is arranged corresponding to the shoulder positions of the multiple battery cells.

[0038] In the above technical solution, the heat exchange flow channel is arranged corresponding to the shoulder positions of the multiple battery cells, and the heat exchange flow channel and the shoulder positions of the multiple battery cells are heat exchanged and matched, thereby achieving the effect of cooling or heating the multiple battery cells.

[0039] In some embodiments, along the first direction, the heat exchange mechanism is located on the same side of multiple battery cells, each battery cell is provided with an end face of an electrode column arranged opposite to the heat exchange mechanism, a groove is formed on the side of the heat exchange mechanism facing the battery cell, and the electrode column of each battery cell is at least partially assembled in the groove.

[0040] In the above technical solution, a groove is formed on the side of the heat exchange mechanism facing the battery cell, and the groove can avoid the corresponding electrode column, thereby reducing the probability of conflict between the electrode column and the heat exchange mechanism, reducing the height of the battery device, making the internal structure of the battery device compact, and helping to improve the space utilization of the battery device.

[0041] In a second aspect, an embodiment of the present application further provides an electrical device, comprising the battery device of the above embodiment.

[0042] Additional aspects and advantages of the present application will be given in part in the description below, and in part will become apparent from the description below, or will be learned through the practice of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0043] The above and / or additional aspects and advantages of the present application will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0044] Figure 1 A schematic diagram of the structure of an electric device provided in some embodiments of the present application;

[0045] Figure 2 A schematic diagram of a battery device provided in some embodiments of the present application;

[0046] Figure 3 An exploded schematic diagram of a battery device provided in some embodiments of the present application;

[0047] Figure 4 A schematic diagram of the sequential arrangement of heat exchange mechanisms and multiple battery cells provided in some embodiments of the present application;

[0048] Figure 5 A top view of a battery device provided for some embodiments of the present application;

[0049] Figure 6 for Figure 5 Schematic cross-sectional view at AA in the middle;

[0050] Figure 7 for Figure 6 A partial enlarged schematic diagram of the middle C area;

[0051] Figure 8 for Figure 5 A schematic cross-sectional view of the middle BB;

[0052] Fig. 9 for Figure 8 A partial enlarged schematic diagram of the D area in the middle;

[0053] Fig.10 A schematic diagram of the assembly of a first plate and a plurality of battery cells provided in some embodiments of the present application;

[0054] Fig.11 for Fig.10 A partial enlarged schematic diagram of the middle E area;

[0055] Fig.12 A schematic diagram of a first plate provided in some embodiments of the present application;

[0056] Fig.13 A schematic diagram of a battery array provided for some embodiments of the present application;

[0057] Fig.14 A schematic diagram of a battery cell provided for some embodiments of the present application.

[0058] Reference numerals:

[0059] The electric device 100,

[0060] Battery device 110,

[0061] Box body 10, accommodating space 11, side frame 12, exhaust port 121, first explosion-proof structure 122,

[0062] Battery cell 20, second explosion-proof structure 21, electrode column 22, shoulder position 23,

[0063] Heat exchange mechanism 30, exhaust channel 31, sub-exhaust channel 311, converging channel 312, exhaust hole 32, heat exchange channel 33, sub-heat exchange channel 331, heat exchange medium inlet 332, heat exchange medium outlet 333, first sub-channel 334, first plate body 34, second plate body 35, groove 36,

[0064] The communication structure 40,

[0065] Controller 120 , electric motor 130 . DETAILED DESCRIPTION

[0066] In order to make the purpose, technical solution and advantages of the embodiments of the present application clearer, the technical solution in the embodiments of the present application will be clearly described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0067] Unless otherwise defined, all technical and scientific terms used in this application have the same meanings as those commonly understood by technicians in the technical field to which this application belongs; the terms used in the specification of this application are only for the purpose of describing specific embodiments and are not intended to limit this application; the terms "including" and "having" in the specification and claims of this application and the above-mentioned figure descriptions and any variations thereof are intended to cover non-exclusive inclusions.

[0068] Reference to "embodiment" in this application means that a particular feature, structure, or characteristic described in conjunction with the embodiment may be included in at least one embodiment of the present application. The appearance of the phrase in various places in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments.

[0069] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", and "attached" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be the internal communication of two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0070] In the embodiments of the present application, the same reference numerals represent the same components, and for the sake of brevity, detailed descriptions of the same components are omitted in different embodiments. It should be understood that the thickness, length, width and other dimensions of various components in the embodiments of the present application shown in the drawings, as well as the overall thickness, length, width and other dimensions of the integrated device are only exemplary descriptions and should not constitute any limitation to the present application.

[0071] The term “plurality” used in this application refers to two or more (including two).

[0072] In the present application, battery cells may include lithium-ion secondary batteries, lithium-ion primary batteries, lithium-sulfur batteries, sodium-lithium-ion batteries, sodium-ion batteries or magnesium-ion batteries, etc., and the embodiments of the present application do not limit this. Battery cells may be cylindrical, flat, rectangular or other shapes, etc., and the embodiments of the present application 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 application do not limit this.

[0073] 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. A 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. 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.

[0074] 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 embodiments of the present application are not limited thereto.

[0075] In recent years, with the continuous development of new energy vehicles, in the field of electric vehicles, battery devices play an irreplaceable and important role as the power source of electric vehicles. The battery device can be composed of a box and multiple battery cells contained in the box. Among them, in order to protect the function, life, performance, etc. of the battery cells, the battery device needs to be able to control the temperature of the battery cells, discharge the high-temperature flammable gas generated when the battery cells fail, etc., reduce the risk of thermal runaway of the battery cells causing the battery device to catch fire, improve the reliability of the battery device, and extend the service life of the battery device.

[0076] In the related art, the existing battery device can realize cooling of the battery cells, but when the battery cells fail thermally, the generated high-temperature flammable gas cannot be discharged from the battery device in time, and the reliability of the battery device is low.

[0077] Based on the above considerations, in order to solve the problem of low reliability of the battery device, after in-depth research, a battery device is designed, including a box body, a plurality of battery cells, a heat exchange mechanism and a connecting structure, the box body defines a accommodating space, a plurality of battery cells are arranged in the accommodating space, the heat exchange mechanism is arranged in the accommodating space, and the heat exchange mechanism is abutted against the plurality of battery cells and cooperates with at least one battery cell for heat exchange, the heat exchange mechanism includes a heat exchange flow channel and an exhaust channel, the heat exchange flow channel is used to cooperate with the battery cell for heat exchange, the heat exchange flow channel includes a heat exchange medium, the box body is formed with an exhaust port, the exhaust channel is used to connect the exhaust port and the accommodating space, the connecting structure is located in the accommodating space, and the exhaust channel is connected to the exhaust port through the connecting structure.

[0078] In a battery device of this structure, the heat exchange mechanism may include a heat exchange flow channel and an exhaust channel. The heat exchange mechanism may cooperate with the battery cell for heat exchange and may also discharge the high-temperature combustible gas in the battery device out of the battery device. The connecting structure may play a role in guiding and connecting. The gas or particulate matter in the exhaust channel may flow to the exhaust port through the connecting structure and be discharged from the battery device from the exhaust port, thereby achieving the effect of directional discharge of thermal runaway gas, thereby reducing the risk of combustion, explosion and fire in the battery device, which is beneficial to improving the reliability of the battery device, and achieving the effect of integrating the heat dissipation function and explosion-proof function of the battery device. The battery device has a high degree of integration and occupies a small space, which is beneficial to improving the space utilization rate of electrical devices.

[0079] The battery disclosed in the embodiment of the present application can be used in, but not limited to, electrical devices such as vehicles, ships or aircraft. Electrical devices that can be connected to the battery device disclosed in the present application are all electrical devices that can be used by the battery device disclosed in the embodiment of the present application, which is conducive to improving the application scope of the battery device.

[0080] For the convenience of description, the following embodiments are described by taking a vehicle as an example of an electric device 100 in some embodiments of the present application.

[0081] Please refer to Figure 1 , Figure 1 A schematic diagram of the structure of a vehicle provided for some embodiments of the present application. The vehicle may be a new energy vehicle, which may be a pure electric vehicle, a hybrid electric vehicle, or an extended-range vehicle, etc. A battery device 110 may be provided inside the vehicle, and the battery device 110 may be provided at the bottom, head, or tail of the vehicle. The battery device 110 may be used to power the vehicle, for example, the battery device 110 may be used as an operating power source for the vehicle, and the battery device 110 may be used as a power source for the vehicle. The vehicle may also include a controller 120 and a motor 130, the controller 120 is used to control the battery device 110 to power the motor 130, the battery device 110 is used for the working power demand in the starting, navigation, and driving of the vehicle, and the battery device 110 is connected to the vehicle to realize the application of the battery device 110 in the vehicle.

[0082] Please refer to Figure 2 and Figure 3 , Figure 2 A schematic diagram of a battery device provided in some embodiments of the present application, Figure 3 An exploded schematic diagram of a battery device provided in some embodiments of the present application, the battery device 110 includes a case 10 and a plurality of battery cells 20, the case 10 defines a receiving space 11, the plurality of battery cells 20 are arranged in the receiving space 11, and the case 10 can be in various shapes, such as: cylinder, cuboid, etc.

[0083] In the battery device 110, multiple battery cells 20 can be connected in series, in parallel, or in a mixed connection. A mixed connection means that multiple battery cells 20 are connected in series and in parallel. Multiple battery cells 20 can be directly connected in series, in parallel, or in a mixed connection, and then the whole formed by multiple battery cells 20 is accommodated in the box 10; of course, the battery device 110 can also be a battery device module in which multiple battery cells 20 are first connected in series, in parallel, or in a mixed connection, and multiple battery device modules are then connected in series, in parallel, or in a mixed connection to form a whole, and accommodated in the box 10. The battery device 110 may also include other structures. For example, the battery device 110 may also include a busbar component for realizing electrical connection between multiple battery cells 20.

[0084] Each battery cell 20 may be a secondary battery or a primary battery; it may also be a lithium-sulfur battery, a sodium-ion battery or a magnesium-ion battery, but is not limited thereto. The battery cell 20 may be cylindrical, flat, rectangular or in other shapes. Fig.14 In the figure, the battery cell 20 is in the shape of a rectangular parallelepiped.

[0085] According to some embodiments of the present application, Figure 2-Figure 14As shown, the present application provides a battery device 110, which may include: a case body 10, a plurality of battery cells 20, a heat exchange mechanism 30 and a connecting structure 40. The case body 10 defines a storage space 11, and a plurality of battery cells 20 are arranged in the storage space 11. The heat exchange mechanism 30 abuts against the plurality of battery cells 20 and cooperates with at least one battery cell 20 for heat exchange. The heat exchange mechanism 30 includes a heat exchange channel 33 and an exhaust channel 31. The heat exchange channel 33 is used for heat exchange with the battery cell 20. The heat exchange channel 33 includes a heat exchange medium. The case body 10 is formed with an exhaust port 121. The exhaust channel 31 is used to connect the exhaust port 121 and the storage space 11. The connecting structure 40 is located in the storage space 11, and the exhaust channel 31 is connected with the exhaust port 121 through the connecting structure 40.

[0086] Among them, the box body 10 defines a accommodating space 11, and a plurality of battery cells 20 are arranged in the accommodating space 11. As an example, a plurality of battery cells 20 can be directly fixedly connected to the box body 10. As another example, a plurality of battery cells 20 can be bundled into a battery module by cable ties, and the battery module can be fixedly connected to the box body 10. The heat exchange mechanism 30 is arranged in the accommodating space 11, and the heat exchange mechanism 30 can abut against the plurality of battery cells 20. The heat exchange mechanism 30 can be used for heat exchange cooperation with the battery cells 20, so as to achieve the effect of regulating the temperature of the battery cells 20. The heat exchange mechanism 30 can cooperate with at least one battery cell 20 for heat exchange. The embodiment of the present application is described by taking the heat exchange cooperation between the heat exchange mechanism 30 and a plurality of battery cells 20 as an example.

[0087] The heat exchange mechanism 30 may be formed with a heat exchange channel 33 and an exhaust channel 31. The heat exchange mechanism 30 may be arranged with a plurality of battery cells 20 along the height direction of the battery device 110. The plurality of battery cells 20 may be located on the same side of the heat exchange mechanism 30 along the height direction of the battery device 110. The heat exchange channel 33 may be used for heat exchange with the battery cell 20. The heat exchange channel 33 may contain a heat exchange medium. The heat exchange medium may flow in the heat exchange channel 33. The heat exchange medium may exchange heat with the battery cell 20, thereby cooling or heating the battery cell 20, and then adjusting the temperature of the battery cell 20 to a suitable temperature. The heat exchange mechanism 30 may be used for heat exchange with a plurality of battery cells 20, thereby making the temperature of the battery device 110 uniform, which is beneficial to improving the reliability of the battery device 110. When a battery cell 20 undergoes thermal runaway, high-temperature combustible gas or particulate matter will be generated. This application takes the high-temperature combustible gas generated when a battery cell 20 undergoes thermal runaway as an example for explanation. These gases have a high risk of explosion, and these gases need to be quickly discharged from the battery device 110. An exhaust channel 31 may be formed in the heat exchange mechanism 30, and an exhaust port 121 may be formed in the box body 10. The exhaust channel 31 may be used to connect the exhaust port 121 and the accommodating space 11. High-temperature combustible gas or particulate matter in the accommodating space 11 may flow to the exhaust port 121 through the exhaust channel 31, thereby achieving the effect of discharging the high-temperature combustible gas from the battery device 110, reducing the risk of fire in the battery device 110, and helping to improve the reliability of the battery device 110.

[0088] The connecting structure 40 may be located in the accommodation space 11, and the connecting structure 40 may be provided between the heat exchange mechanism 30 and the side frame 12. The connecting structure 40 may connect the exhaust channel 31 and the exhaust port 121. The high-temperature combustible gas or particulate matter in the exhaust channel 31 may flow to the exhaust port 121 through the connecting structure 40, and the high-temperature combustible gas or particulate matter may be discharged from the battery device 110 through the exhaust port 121. As an example, there may be multiple exhaust ports 121, and there may be multiple connecting structures 40. Multiple connecting structures 40 and multiple exhaust ports 121 may be provided in a one-to-one correspondence. Multiple connecting structures 40 are all connected to the exhaust channel 31. The high-temperature combustible gas or particulate matter in the exhaust channel 31 may flow to the multiple exhaust ports 121 through the multiple connecting structures 40. The high-temperature combustible gas or particulate matter may be discharged from the battery device 110 through the multiple exhaust ports 121, which is beneficial to improving the emission efficiency of the high-temperature combustible gas and improving the reliability of the battery device 110.

[0089] As an example, the heat exchange mechanism 30 can be constructed as a plate structure, and the heat exchange mechanism 30 can be a water-cooled plate, for example, the heat exchange mechanism 30 can be a brazed water-cooled plate. The heat exchange mechanism 30 can include a first plate 34 and a second plate 35, and the heat exchange mechanism 30 can be arranged in sequence along the height direction of the battery device 110 and the battery cells 20. When the battery device 110 is placed in the up-down direction, the heat exchange mechanism 30 can be located above the multiple battery cells 20, and the first plate 34 can be located below the second plate 35. A heat exchange channel 33 and an exhaust channel 31 are formed between the first plate 34 and the second plate 35, and the first plate 34 and the second plate 35 can jointly define the heat exchange channel 33 and the exhaust channel 31.

[0090] In the above technical solution, the heat exchange mechanism 30 may include a heat exchange flow channel 33 and an exhaust channel 31. The heat exchange mechanism 30 can cooperate with the battery cell 20 for heat exchange, and can also discharge the high-temperature combustible gas in the battery device 110 out of the battery device 110. The connecting structure 40 can play a role of diversion and connection. The gas or particulate matter in the exhaust channel 31 can flow to the exhaust port 121 through the connecting structure 40 and be discharged from the battery device 110 from the exhaust port 121, which can achieve the effect of directional discharge of thermal runaway gas, thereby reducing the risk of combustion, explosion and fire of the battery device 110, which is beneficial to improving the reliability of the battery device 110, and can achieve the effect of integrating the heat dissipation function and the explosion-proof function of the battery device 110. The battery device 110 has a high degree of integration and occupies a small space, which is beneficial to improving the space utilization rate of the electrical device 100.

[0091] In some embodiments, the heat exchange channel 33 and the exhaust channel 31 are not connected.

[0092] Among them, the heat exchange flow channel 33 and the exhaust channel 31 are both located in the heat exchange mechanism 30, and the heat exchange flow channel 33 and the exhaust channel 31 are constructed as independent channels. The heat exchange flow channel 33 and the exhaust channel 31 are not connected, which reduces the risk of the heat exchange medium in the heat exchange flow channel 33 flowing into the exhaust channel 31, and reduces the risk of high-temperature combustible gas in the exhaust channel 31 leaking to the exhaust channel 31, which is beneficial to improving the reliability of the heat exchange mechanism 30.

[0093] In the above technical solution, it is beneficial to improve the reliability of the heat exchange mechanism 30.

[0094] In some embodiments, Fig.11 As shown, the exhaust port 121 is provided with a first explosion-proof structure 122 .

[0095] The first explosion-proof structure 122 may be an explosion-proof valve or an explosion-proof sheet. The first explosion-proof structure 122 may selectively open or close the exhaust port 121. When the battery cell 20 is in thermal runaway and the exhaust channel 31 is filled with high-temperature combustible gas or particulate matter, causing the pressure at the exhaust port 121 to increase to a certain value, the first explosion-proof structure 122 will automatically open, thereby releasing the gas accumulated in the exhaust channel 31 and reducing the pressure in the battery device 110. The first explosion-proof structure 122 can release gas when the internal pressure of the battery device 110 is too high, thereby preventing the box 10 from being deformed or ruptured due to excessive pressure, thereby maintaining the structural integrity of the battery device 110 and facilitating the extension of the service life of the battery device 110. When the battery device 110 is operating normally and there is no gas in the exhaust channel 31, the first explosion-proof structure 122 closes the exhaust port 121, so that the battery device 110 is in a closed state.

[0096] In the above technical solution, by setting the first explosion-proof structure 122, the effect of automatically discharging gas when the exhaust channel 31 is filled with high-temperature combustible gas can be achieved, and the pressure of the battery device 110 can be released in time, which is beneficial to improving the reliability of the battery device 110.

[0097] In some embodiments, Figure 3 As shown, the box body 10 has a side frame 12 , and the side frame 12 is formed with an exhaust port 121 .

[0098] The box body 10 may be formed with a side frame 12, which may be a side wall of the accommodation space 11, and the side frame 12 may extend along the circumference of the battery device 110. The side frame 12 may be formed with an exhaust port 121, and the exhaust port 121 may penetrate the side frame 12 along the arrangement direction of the side frame 12 and the accommodation space 11. The gas in the exhaust channel 31 may be discharged from the side of the battery device 110, so that the high-temperature combustible gas can be discharged in a direction away from the cockpit, thereby protecting the safety of the people in the vehicle.

[0099] In the above technical solution, by arranging the exhaust port 121 at the side frame 12 of the battery device 110 , it is convenient for the substances in the battery device 110 to be discharged from the exhaust channel 31 , so that the exhaust port 121 is reasonably arranged.

[0100] In some embodiments, Figure 7 As shown, the communication structure 40 is a communication pipe.

[0101] Among them, one end of the connecting pipe can be connected to the exhaust channel 31, and the other end of the connecting pipe can be connected to the exhaust port 121. The connecting pipe can balance the air pressure between the exhaust channel 31 and the exhaust port 121. When the pressure in the exhaust channel 31 suddenly increases, the connecting pipe can use its own connecting function to make the gas in the exhaust channel 31 flow quickly to the exhaust port 121, thereby reducing the pressure in the exhaust channel 31 and avoiding damage to the battery device 110 due to excessive pressure. The connecting pipe has a simple structure and is easy to disassemble and replace, which can save installation time and labor costs.

[0102] In the above technical solution, by setting the connecting structure 40 as a connecting pipe, the effect of quickly discharging the gas in the exhaust channel 31 can be achieved, and the connecting pipe has a simple structure, which is conducive to reducing costs.

[0103] In some embodiments, Figure 7 As shown, the connecting pipe is constructed as a bent pipe.

[0104] Among them, the bending tube can flexibly change its direction, and the bending tube can be bent and arranged according to the actual space requirements to reduce the space occupied. When the connecting structure 40 is installed between the heat exchange mechanism 30 and the side frame 12, the connecting structure 40 constructed as a bending tube can realize the connection between the exhaust channel 31 and the exhaust port 121 in a limited or complex space, and the bending tube can avoid other structures in the battery device 110. In addition, the special shape of the bending tube can form a certain air sealing effect to prevent external air or other foreign matter from flowing back into the exhaust channel 31.

[0105] In the above technical solution, by constructing the connecting tube as a bent tube, the probability of conflict between the connecting tube and other structures in the battery device 110 can be reduced, and the connecting tube can be better arranged.

[0106] In some embodiments, the heat exchange mechanism 30 is formed with a connecting portion, and the connecting portion is used to connect the accommodating space 11 and the exhaust passage 31 .

[0107] The heat exchange mechanism 30 is formed with a connecting portion, and the accommodation space 11 and the exhaust channel 31 are connected through the connecting portion. The connecting portion can be configured as an exhaust hole 32, an explosion-proof valve, an explosion-proof disk, a thinner weak portion on the heat exchange mechanism 30, etc. As an example, when the connecting portion is configured as an exhaust hole 32, the accommodation space 11 and the exhaust channel 31 are always connected, and when high-temperature combustible gas is generated in the accommodation space 11, the high-temperature combustible gas can enter the exhaust channel 31 through the exhaust hole 32. As another example, when the connecting portion is configured as an explosion-proof valve or an explosion-proof disk, the accommodation space 11 and the exhaust channel 31 are selectively connected. When there is no high-temperature combustible gas in the accommodation space 11, the accommodation space 11 and the exhaust channel 31 are not connected. When there is high-temperature combustible gas in the accommodation space 11, the explosion-proof valve, the explosion-proof disk, etc. can be automatically opened, and the high-temperature combustible gas can enter the exhaust channel 31 through the connecting portion.

[0108] In the above technical solution, by providing a connecting portion, the effect of connecting the accommodating space 11 and the exhaust channel 31 can be achieved. When high-temperature combustible gas is generated in the accommodating space 11, the high-temperature combustible gas can flow from the accommodating space 11 into the exhaust channel 31 through the connecting portion, thereby reducing the risk of high-temperature combustible gas accumulating in the accommodating space 11 and causing the box body 10 to deform or rupture due to excessive pressure, which is beneficial to improving the reliability of the battery device 110 and extending the service life of the battery device 110.

[0109] In some embodiments, Fig.10 and Fig.11 As shown, the heat exchange mechanism 30 is formed with an exhaust hole 32 , and the exhaust hole 32 is configured as a communication portion.

[0110] The heat exchange mechanism 30 may be formed with an exhaust hole 32, which may connect the accommodation space 11 and the exhaust channel 31, and the exhaust hole 32 may be configured as a connecting portion, so that the high-temperature combustible gas generated by the battery cell 20 in the accommodation space 11 may enter the exhaust channel 31 through the exhaust hole 32. As an example, when the heat exchange mechanism 30 is configured as a plate structure, the first plate 34 may be formed with an exhaust hole 32, and the exhaust hole 32 may penetrate the first plate 34 along the thickness direction of the first plate 34. As an example, there may be multiple exhaust holes 32, and the multiple exhaust holes 32 may be arranged in sequence on the heat exchange mechanism 30. By providing multiple exhaust holes 32, the rate at which the high-temperature combustible gas enters the exhaust channel 31 may be increased, and the discharge rate of the high-temperature combustible gas may be increased, which is beneficial to improving the reliability of the battery device 110.

[0111] In the above technical solution, by providing the exhaust hole 32 , the high-temperature combustible gas generated by the battery cell 20 in the accommodation space 11 can enter the exhaust channel 31 through the exhaust hole 32 .

[0112] In some embodiments, the heat exchange mechanism 30 is formed with an explosion-proof portion, which is configured to connect the accommodating space 11 and the exhaust passage 31 when the pressure in the accommodating space 11 reaches a preset pressure value, and the explosion-proof portion is constructed as a connecting portion.

[0113] The heat exchange mechanism 30 may be formed with an explosion-proof part. As an example, the explosion-proof part may be an explosion-proof valve or an explosion-proof sheet. As another example, the explosion-proof part may be a thinner weak part on the heat exchange mechanism 30, and the weak part is configured as an explosion-proof part. When the battery cell 20 undergoes thermal runaway and the storage space 11 is filled with high-temperature combustible gas, causing the pressure in the storage space 11 to increase to a preset pressure value, the explosion-proof part may rupture or be opened under the action of high pressure, and the explosion-proof part may connect the storage space 11 and the exhaust channel 31. The explosion-proof part is configured as a connecting part, so that the high-temperature combustible gas generated by the battery cell 20 in the storage space 11 can enter the exhaust channel 31 through the exhaust hole 32, thereby reducing the pressure in the storage space 11. As an example, when the heat exchange mechanism 30 is configured as a cold water plate, an explosion-proof part may be formed on the first plate body 34, and the explosion-proof part may selectively connect the storage space 11 and the exhaust channel 31.

[0114] As an example, when the explosion-proof part is constructed as an explosion-proof valve, when the battery cell 20 has thermal runaway, the storage space 11 is filled with high-temperature combustible gas, causing the pressure in the storage space 11 to increase to a preset pressure value, the explosion-proof part can be opened under the action of high pressure, so that the storage space 11 and the exhaust channel 31 are connected, so that the high-temperature combustible gas can enter the exhaust channel 31. As another example, when the explosion-proof part is constructed as an explosion-proof plate, a thinner weak part on the heat exchange mechanism 30, etc., when the battery cell 20 has thermal runaway, the storage space 11 is filled with high-temperature combustible gas, causing the pressure in the storage space 11 to increase to a preset pressure value, the explosion-proof part can be broken under the action of high pressure, and the explosion-proof part ruptures, so that the storage space 11 and the exhaust channel 31 are connected, so that the high-temperature combustible gas can enter the exhaust channel 31.

[0115] As an example, there may be multiple explosion-proof parts, and the multiple explosion-proof parts may be arranged in sequence on the heat exchange mechanism 30. By providing multiple explosion-proof parts, the rate at which high-temperature combustible gas enters the exhaust channel 31 can be increased, and the emission rate of high-temperature combustible gas can be increased, which is beneficial to improving the reliability of the battery device 110.

[0116] In the above technical solution, by setting up an explosion-proof part, when the high-temperature combustible gas generated by the battery cell 20 in the accommodating space 11 makes the pressure in the accommodating space 11 reach a preset pressure value, the explosion-proof part can connect the accommodating space 11 and the exhaust channel 31, and the high-temperature combustible gas can enter the exhaust channel 31 through the explosion-proof part.

[0117] In some embodiments, Figure 4and Fig.11 As shown, each battery cell 20 has a second explosion-proof structure 21 , and the connecting portion is arranged opposite to the second explosion-proof structure 21 of at least one battery cell 20 .

[0118] Among them, the second explosion-proof structure 21 can be constructed as an explosion-proof valve, an explosion-proof plate, etc., and the second explosion-proof structure 21 can selectively open the battery cell 20. When the internal pressure of the battery cell 20 rises sharply and exceeds the specified safety pressure, the second explosion-proof structure 21 can be opened to release the gas inside the battery cell 20 and reduce the pressure. When the heat exchange mechanism 30 and the battery cell 20 are arranged in sequence along the height direction of the battery device 110, the connecting part can be arranged relative to the second explosion-proof structure 21 of the battery cell 20 along the height direction of the battery device 110. The connecting part can be arranged relative to the second explosion-proof structure 21 of at least one battery cell 20, and the high-temperature combustible gas generated when the battery cell 20 is thermally runaway can be discharged from the battery cell 20 through the second explosion-proof structure 21, so that the gas can enter the exhaust channel 31 through the corresponding connecting part.

[0119] In the above technical solution, by providing each battery cell 20 with a second explosion-proof structure 21, the battery cell 20 can be selectively opened. When the pressure in the battery cell 20 increases and gas needs to be released to reduce the pressure, the second explosion-proof structure 21 is opened. The gas generated when the battery cell 20 is thermally runaway can be discharged from the battery cell 20 through the second explosion-proof structure 21, which can facilitate the gas to enter the exhaust channel 31 through the corresponding connecting portion.

[0120] In some embodiments, there are multiple connecting parts, and the second explosion-proof structure 21 of each battery cell 20 is arranged opposite to at least one connecting part.

[0121] There may be multiple connecting parts, and the multiple connecting parts may be evenly distributed on the heat exchange mechanism 30, which is beneficial to increase the connecting area between the exhaust channel 31 and the accommodating space 11, and can effectively improve the exhaust speed and efficiency. The second explosion-proof structure 21 of each battery cell 20 may be arranged relative to at least one connecting part, so that the high-temperature combustible gas generated by each battery cell 20 can enter the exhaust channel 31 through at least one connecting part. When one or more battery cells 20 have thermal runaway, the multiple connecting parts can quickly discharge a large amount of gas generated, avoid gas accumulation in the battery cell 20, reduce the risk of affecting the performance and life of the battery device 110 due to excessively high or low local pressure, and enable the battery device 110 to work stably.

[0122] In the above technical solution, by providing a plurality of connecting parts, the exhaust rate of the battery cell 20 can be further increased, and the reliability of the battery device 110 can be further improved.

[0123] In some embodiments, along the first direction, the heat exchange mechanism 30 is located on the same side of the plurality of battery cells 20 , and the end surface of each battery cell 20 provided with the second explosion-proof structure 21 is arranged opposite to the heat exchange mechanism 30 .

[0124] In the first direction (i.e., the height direction of the battery device 110), the heat exchange mechanism 30 can be located on the same side of the multiple battery cells 20, and the multiple battery cells 20 are placed in the same direction in the accommodating space 11, and the second explosion-proof structure 21 of each battery cell 20 is arranged toward the heat exchange mechanism 30. Figure 3 When setting the direction, the first direction can be Figure 3 The second explosion-proof structure 21 may be located on one side of the corresponding battery cell 20 along the first direction. The second explosion-proof structure 21 of the battery cell 20 and the heat exchange mechanism 30 may be located on the same side of the battery cell 20. The end surface of each battery cell 20 provided with the second explosion-proof structure 21 is arranged opposite to the heat exchange mechanism 30. The high-temperature combustible gas generated by the battery cell 20 may enter the heat exchange mechanism 30 through the second explosion-proof structure 21, thereby achieving the effect of simultaneously discharging the gas generated by multiple thermally runaway battery cells 20, which is beneficial to improving the reliability of the battery device 110.

[0125] In the above technical solution, by arranging that the end face of the second explosion-proof structure 21 of each battery cell 20 is arranged opposite to the heat exchange mechanism 30, it can be achieved that when the second explosion-proof structure 21 is activated due to the abnormal increase in the internal pressure of the battery cell 20, the exhausted high-temperature combustible gas can directly flow into the exhaust channel 31 of the heat exchange mechanism 30, and the exhausted heat can be directly absorbed by the heat exchange mechanism 30, which can not only reduce the temperature of the exhaust gas and reduce the thermal hazard to the surrounding environment, but also reduce the risk of high-temperature combustible gas accumulation inside the battery cell 20, further reduce the risk of failure of other battery cells 20 due to thermal runaway of a battery cell 20, and enhance the reliability of the entire battery device 110.

[0126] In some embodiments, the plurality of connecting portions and the second explosion-proof structures 21 of the plurality of battery cells 20 are arranged in a one-to-one correspondence.

[0127] There may be multiple battery cells 20, each of which has a second explosion-proof structure 21, and there may be multiple connecting parts, which may be arranged one-to-one with the second explosion-proof structures 21 of multiple battery cells 20. The second explosion-proof structure 21 of each battery cell 20 has a connecting part arranged corresponding thereto, and the end surface of each battery cell 20 provided with the second explosion-proof structure 21 is arranged opposite to the corresponding connecting part. The high-temperature flammable gas generated by each battery cell 20 can enter the exhaust channel 31 through the corresponding second explosion-proof structure 21 and the corresponding connecting part, so that the gas in the battery cell 20 can be discharged in time, reducing the risk of gas accumulation inside the battery cell 20 to form a flammable or explosive mixed gas environment, and reducing the probability of explosion and fire.

[0128] When a battery cell 20 experiences thermal runaway, the high-temperature combustible gas generated by the battery cell 20 can be quickly discharged to the exhaust channel 31 through the corresponding connecting part, which can reduce heat radiation and heat conduction to adjacent battery cells 20 and surrounding components, reduce the risk of heat diffusion, and reduce the risk of triggering a chain reaction, which is beneficial to improving the reliability of the battery device 110.

[0129] In the above technical solution, by arranging multiple connecting parts and the second explosion-proof structures 21 of multiple battery cells 20 in a one-to-one correspondence, the high-temperature combustible gas generated by each battery cell 20 can enter the exhaust channel 31 through the corresponding second explosion-proof structure 21 and the corresponding connecting part, which can further increase the gas emission rate and reduce the risk of combustion and explosion of the battery device 110, which is conducive to further improving the reliability of the battery device 110.

[0130] In some embodiments, Figure 3 , Figure 4 and Fig.12 As shown, a plurality of battery cells 20 form at least one battery column, a plurality of battery cells 20 in each battery column are sequentially arranged along the second direction, the first direction and the second direction are perpendicular, the exhaust channel 31 has at least one sub-exhaust channel 311 extending along the second direction, the sub-exhaust channel 311 and the plurality of battery cells 20 in the corresponding battery column are arranged relative to each other, a plurality of connecting parts form at least one connecting part column, a plurality of connecting parts in each connecting part column are sequentially arranged along the second direction, and along the first direction, each sub-exhaust channel 311 is arranged corresponding to at least one connecting part column.

[0131] The plurality of battery cells 20 form at least one battery column, and the plurality of battery cells 20 in each battery column can be arranged in sequence along the second direction, and the plurality of battery cells 20 can be connected in sequence. Figure 3 When setting the direction, the second direction can be Figure 3The exhaust channel 31 may have at least one sub-exhaust channel 311, the sub-exhaust channel 311 may extend along the second direction, the sub-exhaust channel 311 may be arranged opposite to at least one battery column along the first direction, and the sub-exhaust channel 311 may be arranged opposite to a plurality of battery cells 20 in the corresponding battery column.

[0132] A plurality of connecting parts form at least one column of connecting parts, and a plurality of connecting parts in each column of connecting parts can be arranged in sequence along the second direction, and a plurality of connecting parts in each column of connecting parts can be arranged one-to-one with the second explosion-proof structures 21 of a plurality of battery cells 20 in a corresponding battery column along the first direction, thereby achieving an effect of a one-to-one corresponding arrangement of a plurality of connecting parts and a plurality of second explosion-proof structures 21 of a plurality of battery cells 20.

[0133] Along the first direction, each sub-exhaust channel 311 is arranged corresponding to at least one column of connecting parts, each sub-exhaust channel 311 can be arranged corresponding to one column of connecting parts, or each sub-exhaust channel 311 can be arranged corresponding to multiple columns of connecting parts, so that each sub-exhaust channel 311 has a corresponding column of connecting parts, so that each sub-exhaust channel 311 can be connected to the accommodating space 11, reducing the probability of some sub-exhaust channels 311 being isolated from the accommodating space 11, so that the high-temperature combustible gas generated by each battery cell 20 can be discharged to the sub-exhaust channel 311 through the corresponding connecting part, which is beneficial to improving the utilization rate of the exhaust channel 31.

[0134] In the above technical solution, the high-temperature combustible gas generated by each battery cell 20 can be discharged to the sub-exhaust channel 311 through the corresponding connecting part, which can reduce the probability of the sub-exhaust channel 311 being unused, which is beneficial to improve the utilization rate of the exhaust channel 31.

[0135] In some embodiments, a plurality of battery cells 20 form a plurality of battery columns, which are arranged in sequence along a third direction, the exhaust channel 31 has a plurality of sub-exhaust channels 311, which are arranged in sequence along the third direction, the plurality of sub-exhaust channels 311 correspond one-to-one to the plurality of battery columns, a plurality of connecting portions form a plurality of connecting portion columns, the plurality of connecting portion columns correspond one-to-one to the plurality of sub-exhaust channels 311, and the first direction, the second direction and the third direction are perpendicular to each other.

[0136] The battery row may be multiple rows, and the multiple battery rows may be arranged along the third direction. Figure 3 When setting the direction, the third direction can be Figure 3In the X direction, the first direction, the second direction and the third direction are perpendicular to each other. The exhaust channel 31 may have a plurality of sub-exhaust channels 311, and the plurality of sub-exhaust channels 311 may be arranged in sequence along the third direction. The plurality of sub-exhaust channels 311 may be arranged in one-to-one correspondence with the plurality of battery columns along the first direction. Each sub-exhaust channel 311 has a battery column arranged corresponding thereto, and each sub-exhaust channel 311 may be arranged relative to the plurality of battery cells 20 in the corresponding battery column. The plurality of connecting parts may form a plurality of connecting part columns, and the plurality of connecting part columns may be arranged in sequence along the third direction. The plurality of connecting part columns and the plurality of sub-exhaust channels 311 may be arranged in one-to-one correspondence along the first direction. Each battery column, each connecting part column and each sub-exhaust channel 311 may be arranged correspondingly along the first direction.

[0137] The plurality of connecting parts and the plurality of battery cells 20 may be arranged in a one-to-one correspondence along the first direction, and the number of the connecting parts may be the same as the number of the battery cells 20. The plurality of connecting parts in each connecting part column are sequentially arranged along the second direction, and the plurality of battery cells 20 in each battery column are sequentially arranged along the second direction, and the number of the plurality of connecting parts in each connecting part column may be the same as the number of the plurality of battery cells 20 in each battery column.

[0138] In the above technical solution, each battery column, each connecting portion column and each sub-exhaust channel 311 can be arranged correspondingly along the first direction, and the high-temperature combustible gas generated by each battery cell 20 can be discharged to the corresponding sub-exhaust channel 311 through the corresponding connecting portion, so as to achieve directional discharge of gas in each battery cell 20, reduce the probability of high-temperature combustible gas escaping in the accommodating space 11, and reduce the probability of failed battery cells 20 affecting other normally operating battery cells 20, which is beneficial to improving the stability and reliability of the battery device 110.

[0139] In some embodiments, Fig.10 and Fig.12 As shown, the exhaust channel 31 further has a converging channel 312 , which extends along the third direction. The plurality of sub-exhaust channels 311 are all connected to the converging channel 312 , and the converging channel 312 is used to connect to the exhaust port 121 .

[0140] Among them, the exhaust channel 31 also has a confluence channel 312, which can extend along the third direction, and the confluence channel 312 can be arranged on one side of the plurality of sub-exhaust channels 311 along the second direction, and the plurality of sub-exhaust channels 311 are all connected to the confluence channel 312, so that the plurality of sub-exhaust channels 311 are connected to each other, and the gas in the plurality of sub-exhaust channels 311 can be gathered in the confluence channel 312. The arrangement of the confluence channel 312 makes the exhaust system of the battery device 110 more compact and reasonable in spatial layout, and simplifies the structure of the heat exchange mechanism 30 for exhaust. The confluence channel 312 can be connected to the exhaust port 121, the confluence channel 312 can be directly connected to the exhaust port 121, the confluence channel 312 can be indirectly connected to the exhaust port 121, and the connecting structure 40 can be arranged between the confluence channel 312 and the exhaust port 121, so that the confluence channel 312 is connected to the exhaust port 121. The confluence channel 312 and the connecting structure 40 can be arranged on the same side of the battery device 110. When the battery cell 20 fails and generates high-temperature combustible gas, the gas can enter the corresponding sub-exhaust channel 311 through the corresponding connecting part, the gas can flow to the confluence channel 312 and enter the connecting structure 40 through the exhaust port 121, and the gas is finally discharged from the battery device 110 through the connecting structure 40.

[0141] As an example, there may be multiple exhaust ports 121, and the multiple exhaust ports 121 may be arranged in sequence along a third direction. There may be multiple connecting structures 40, and the confluence channel 312 may be connected to the multiple connecting structures 40, thereby achieving an effect in which the confluence channel 312 and the multiple exhaust ports 121 are all connected, which is beneficial to improving the efficiency of discharging the gas in the exhaust channel 31.

[0142] In the above technical solution, a plurality of sub-exhaust channels 311 can be connected by providing a confluence channel 312 , and the confluence channel 312 is connected to the exhaust port 121 , so that the gases in the plurality of sub-exhaust channels 311 can be discharged through the exhaust port 121 .

[0143] In some embodiments, Figure 3 and Fig.12 As shown, along the first direction, the heat exchange mechanism 30 is located on the same side of the multiple battery cells 20, the heat exchange channel 33 includes a plurality of sub-heat exchange channels 331, the sub-heat exchange channels 331 extend along the second direction, and the plurality of sub-heat exchange channels 331 are arranged in sequence along the third direction, and any two adjacent sub-heat exchange channels 331 are bent, connected and communicated, the exhaust channel 31 has at least one sub-exhaust channel 311 extending along the second direction, and a sub-exhaust channel 311 is provided between at least two adjacent sub-heat exchange channels 331, and the first direction, the second direction and the third direction are perpendicular to each other.

[0144] In the first direction, the heat exchange mechanism 30 is located on the same side of the multiple battery cells 20. When the battery device 110 is placed in the up-down direction, the heat exchange mechanism 30 can be located above the multiple battery cells 20. The heat exchange channel 33 can include multiple sub-heat exchange channels 331, and the sub-heat exchange channels 331 can extend along the second direction. The multiple sub-heat exchange channels 331 can be arranged in sequence along the third direction. The multiple sub-heat exchange channels 331 can be relatively arranged and spaced apart along the third direction. The first direction, the second direction and the third direction are perpendicular to each other. Any two adjacent sub-heat exchange channels 331 are connected, any two adjacent sub-heat exchange channels 331 are connected by bending, and two adjacent sub-heat exchange channels 331 can be connected by bending through the first sub-channel 334, that is, the two adjacent sub-heat exchange channels 331 are connected to the first sub-channel 334, the first sub-channel 334 is connected between the two adjacent sub-heat exchange channels 331, and an angle is formed between the two adjacent sub-heat exchange channels 331 and the first sub-channel 334, and the angle is a right angle. Alternatively, the two adjacent sub-heat exchange channels 331 can be directly connected by bending.

[0145] The two ends of at least one sub-heat exchange channel 331 along the second direction can be respectively connected to the two sub-heat exchange channels 331 located on both sides thereof along the third direction, one end of at least one sub-heat exchange channel 331 is connected to the adjacent sub-heat exchange channel 331 by a bending connection through the first sub-channel 334, and the other end of at least one sub-heat exchange channel 331 is directly connected to the adjacent sub-heat exchange channel 331 by a bending connection.

[0146] As an example, the heat exchange channel 33 can be constructed as a bent structure. Fig.12 Taking the arrangement of the middle heat exchange channel 33 and the exhaust channel 31 as an example, the first sub-heat exchange channel 331 of the multiple sub-heat exchange channels 331 arranged along the third direction can be bent and connected with the adjacent sub-heat exchange channel 331 (i.e., the second sub-heat exchange channel 331 of the multiple sub-heat exchange channels 331 arranged along the third direction) through the first sub-channel 334, the left end of the first sub-heat exchange channel 331 along the second direction can be bent and connected with the first sub-channel 334, and the first sub-heat exchange channel 331 can form an angle with the first sub-channel 334, which can be a right angle. The left end of the second sub-heat exchange channel 331 along the second direction can be bent and connected with the first sub-channel 334, and the first sub-channel 334 can form an angle with the second sub-heat exchange channel 331, which can be a right angle. The second sub-heat exchange channel 331 among the multiple sub-heat exchange channels 331 arranged along the third direction can be directly bent and connected to the third sub-heat exchange channel 331 among the multiple sub-heat exchange channels 331 arranged along the third direction, and the right end of the second sub-heat exchange channel 331 along the second direction can be connected to the third sub-heat exchange channel 331.

[0147] The third sub-heat exchange channel 331 among the multiple sub-heat exchange channels 331 arranged along the third direction and the fourth sub-heat exchange channel 331 among the multiple sub-heat exchange channels 331 arranged along the third direction can be connected by bending through the first sub-channel 334, and so on, the connection mode between two adjacent sub-heat exchange channels 331 is changed in sequence, so as to achieve the effect of connecting multiple sub-heat exchange channels 331 in series in sequence. There can be multiple first sub-channels 334, and the multiple first sub-channels 334 are all connected to the left end of the corresponding sub-heat exchange channel 331. A heat exchange medium inlet 332 can be provided at one end of the heat exchange channel 33, and a heat exchange medium outlet 333 can be provided at the other end of the heat exchange channel 33, so as to realize the flow of the heat exchange medium in the heat exchange channel 33, and the heat exchange medium flows out of the heat exchange channel 33 after heat exchange with the battery cell 20 and takes away the heat.

[0148] The exhaust channel 31 has at least one sub-exhaust channel 311 extending along the second direction. The sub-exhaust channel 311 can be arranged corresponding to the battery column. A sub-exhaust channel 311 is provided between at least two adjacent sub-heat exchange channels 331. Each battery column can be arranged corresponding to at least one sub-heat exchange channel 331. Each battery column can also be arranged corresponding to the sub-exhaust channel 311, thereby achieving the effect of the heat exchange mechanism 30 regulating the temperature and exhausting the battery cells 20.

[0149] As an example, Fig.12 As shown, two adjacent sub-heat exchange channels 331 connected by the first sub-channel 334 are spaced apart, and a sub-exhaust channel 311 may be provided between the two adjacent sub-heat exchange channels 331 connected by the first sub-channel 334. The right ends of the two sub-heat exchange channels 331 connected by the first sub-channel 334 are spaced apart, and the sub-exhaust channel 311 may be inserted between the corresponding two sub-heat exchange channels 331 from the right end gap of the corresponding two sub-heat exchange channels 331. The sub-exhaust channel 311 may cooperate with the adjacent sub-heat exchange channels 331 to achieve the effect of both adjusting the temperature and exhausting the corresponding battery cell 20.

[0150] In the above technical solution, by setting the heat exchange channel 33 to include multiple sub-heat exchange channels 331, the heat exchange coordination effect of the heat exchange mechanism 30 and multiple battery cells 20 can be achieved, so that the heat exchange mechanism 30 can achieve the effect of both regulating the temperature and exhausting the battery cells 20.

[0151] In some embodiments, Fig. 9 and Fig.11 As shown, each battery cell 20 has a second explosion-proof structure 21. Along the first direction, the heat exchange mechanism 30 is located on the same side of the multiple battery cells 20. The end face of each battery cell 20 provided with the second explosion-proof structure 21 is arranged opposite to the heat exchange mechanism 30, and the heat exchange channel 33 is arranged corresponding to the shoulder position 23 of the multiple battery cells 20.

[0152] Among them, along the first direction, the heat exchange mechanism 30 is located on the same side of the plurality of battery cells 20, each battery cell 20 has a second explosion-proof structure 21, and the end surface of each battery cell 20 provided with the second explosion-proof structure 21 can be arranged opposite to the heat exchange mechanism 30, and at least part of the end surface of each battery cell 20 provided with the second explosion-proof structure 21 can abut against the heat exchange mechanism 30, so that the positioning and installation of the heat exchange mechanism 30 can be achieved. The shoulder positions 23 of the plurality of battery cells 20 in each battery column can be arranged in sequence along the second direction, and the plurality of battery cells 20 in each battery column have two shoulder positions 23 opposite to each other along the third direction, and each shoulder position 23 of each battery cell 20 can be arranged corresponding to a sub-heat exchange channel 331, and the heat exchange mechanism 30 can exchange heat with the shoulder position 23 of the battery cell 20. Each battery column can be arranged corresponding to two sub-heat exchange channels 331, and the two sub-heat exchange channels 331 can be arranged corresponding to the two shoulder positions 23 of the battery cell 20 respectively along the first direction.

[0153] As an example, a sub-heat exchange channel 331 can be set corresponding to two columns of battery columns along the first direction, and a sub-heat exchange channel 331 can be set corresponding to the shoulder positions 23 adjacent to two battery cells 20 along the first direction, thereby achieving the effect of heat exchange between a sub-heat exchange channel 331 and the battery cells 20 in the two columns of battery columns.

[0154] In the above technical solution, the heat exchange channel 33 is arranged corresponding to the shoulder positions 23 of the multiple battery cells 20 , and the heat exchange channel 33 cooperates with the shoulder positions 23 of the multiple battery cells 20 to achieve the effect of cooling or heating the multiple battery cells 20 .

[0155] In some embodiments, Fig. 9 and Fig.11 As shown, along the first direction, the heat exchange mechanism 30 is located on the same side of multiple battery cells 20, and each battery cell 20 is provided with an end face of an electrode column 22 arranged opposite to the heat exchange mechanism 30. The heat exchange mechanism 30 is formed with a groove 36 on the side facing the battery cell 20, and the electrode column 22 of each battery cell 20 is at least partially assembled in the groove 36.

[0156] Among them, along the first direction, the heat exchange mechanism 30 is located on the same side of the plurality of battery cells 20, and the end surface of each battery cell 20 provided with the electrode column 22 is arranged opposite to the heat exchange mechanism 30, and the end surface of each battery cell 20 provided with the electrode column 22 and the end surface of each battery cell 20 provided with the second explosion-proof structure 21 are both located on the same side of the corresponding battery cell 20. A groove 36 is formed on the side of the heat exchange mechanism 30 facing the battery cell 20, and the groove 36 can extend along the second direction, and the groove 36 is recessed toward the first plate body 34 along the first direction. Along the third direction, the groove 36 can be located between the adjacent sub-heat exchange flow channel 331 and the sub-exhaust channel 311, and at least part of the electrode column 22 of each battery cell 20 is assembled in the groove 36. The groove 36 can avoid the corresponding electrode column 22, reduce the probability of conflict between the electrode column 22 and the heat exchange mechanism 30, and can reduce the height dimension of the battery device 110, so that the internal structure of the battery device 110 is compact, which is conducive to improving the space utilization of the battery device 110.

[0157] In the above technical solution, a groove 36 is formed on the side of the heat exchange mechanism 30 facing the battery cell 20. The groove 36 can avoid the corresponding electrode column 22, thereby reducing the probability of conflict between the electrode column 22 and the heat exchange mechanism 30. The height dimension of the battery device 110 can be reduced, and the internal structure of the battery device 110 can be compact, which is beneficial to improving the space utilization of the battery device 110.

[0158] According to some embodiments of the present application, the present application further provides an electrical device 100, comprising a battery device 110 of any of the above solutions.

[0159] Among them, the electrical device 100 can be any of the aforementioned devices using the battery device 110. Using the battery device 110 in the above embodiments can reduce the space occupied by the battery device 110, which is beneficial to improving the space utilization rate of the electrical device 100. It can also discharge the high-temperature flammable gas generated by the battery device 110 in time when thermal runaway occurs in the battery cell 20, which is beneficial to improving the reliability of the electrical device 100.

[0160] According to some embodiments of the present application, Figure 1-Figure 14As shown, the present application proposes a battery device 110, which includes a housing 10, a plurality of battery cells 20 and a heat exchange mechanism 30. The housing 10 defines a storage space 11, and a plurality of battery cells 20 are disposed in the storage space 11. The heat exchange mechanism 30 is disposed in the storage space 11 and cooperates with the plurality of battery cells 20 for heat exchange. The heat exchange mechanism 30 is formed with an exhaust channel 31, and the exhaust channel 31 includes a plurality of sub-exhaust channels 311 extending along the second direction, and the plurality of sub-exhaust channels 311 are arranged in sequence along the third direction, and the plurality of sub-exhaust channels 311 are all connected to a confluence channel 312. The housing 10 is formed with an exhaust port 121, and the confluence channel 312 is used to connect the exhaust port 121, and the exhaust channel 31 connects the exhaust port 121 and the storage space 11. The exhaust port 121 is provided with a first explosion-proof structure 122, the box body 10 has a side frame 12, the side frame 12 is formed with an exhaust port 121, the exhaust channel 31 is connected to the exhaust port 121 through a connecting structure 40, and the connecting structure 40 is a bent connecting pipe. The heat exchange mechanism 30 is formed with a plurality of exhaust holes 32, the exhaust holes 32 connect the accommodating space 11 and the exhaust channel 31, and the plurality of exhaust holes 32 form a plurality of connecting portion columns, which are arranged in sequence along the third direction, and the plurality of battery cells 20 form a plurality of battery columns, which are arranged in sequence along the third direction, and the number of connecting portion columns, the number of battery columns and the number of sub-exhaust channels 311 are the same. Each connecting portion column, battery column and sub-exhaust channel 311 are arranged one-to-one along the first direction. The plurality of exhaust holes 32 and the second explosion-proof structures 21 of the plurality of battery cells 20 are arranged one-to-one.

[0161] Each battery cell 20 has a second explosion-proof structure 21, and each exhaust hole 32 is arranged opposite to the second explosion-proof structure 21 of each battery cell 20 along the first direction. The heat exchange mechanism 30 is located on the same side of the multiple battery cells 20, and a heat exchange flow channel 33 is formed in the heat exchange mechanism 30. The end face of each battery cell 20 provided with the second explosion-proof structure 21 is arranged opposite to the heat exchange mechanism 30, and the heat exchange flow channel 33 is arranged corresponding to the shoulder position 23 of the multiple battery cells 20. The end face of each battery cell 20 provided with the electrode column 22 is arranged opposite to the heat exchange mechanism 30, and a groove 36 is formed on the side of the heat exchange mechanism 30 facing the battery cell 20, and the electrode column 22 of each battery cell 20 is at least partially assembled in the groove 36.

[0162] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application may be combined with each other.

[0163] The above are only preferred embodiments of the present application and are not intended to limit the present application. For those skilled in the art, the present application may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A battery device, characterized in that: include: A box body and a plurality of battery cells, wherein the box body defines a storage space, and the plurality of battery cells are arranged in the storage space; A heat exchange mechanism, the heat exchange mechanism is arranged in the accommodation space, and the heat exchange mechanism abuts against the plurality of battery cells and cooperates with at least one of the battery cells for heat exchange, the heat exchange mechanism includes a heat exchange flow channel and an exhaust channel, the heat exchange flow channel is used to cooperate with the battery cells for heat exchange, the heat exchange flow channel includes a heat exchange medium, the box body is formed with an exhaust port, and the exhaust channel is used to connect the exhaust port and the accommodation space; A communication structure is located in the accommodating space, and the exhaust passage is communicated with the exhaust port through the communication structure.

2. The battery device according to claim 1, characterized in that: The heat exchange flow channel is not connected to the exhaust channel.

3. The battery device according to claim 1, characterized in that: The exhaust port is provided with a first explosion-proof structure.

4. The battery device according to claim 1, characterized in that: The box body has a side frame, and the exhaust port is formed on the side frame.

5. The battery device according to claim 1, characterized in that: The communication structure is a communication pipe.

6. The battery device according to claim 5, characterized in that: The connecting pipe is configured as a bent pipe.

7. The battery device according to any one of claims 1 to 6, characterized in that: The heat exchange mechanism is formed with a communication portion, and the communication portion is used to communicate the accommodating space and the exhaust passage.

8. The battery device according to claim 7, characterized in that: The heat exchange mechanism is formed with an exhaust hole, and the exhaust hole is configured as the communication portion.

9. The battery device according to claim 7, characterized in that: The heat exchange mechanism is formed with an explosion-proof portion, and the explosion-proof portion is configured to connect the accommodating space and the exhaust passage when the pressure in the accommodating space reaches a preset pressure value. The explosion-proof portion is configured as the connecting portion.

10. The battery device according to claim 7, characterized in that: Each of the battery cells has a second explosion-proof structure, and the connecting portion is arranged opposite to the second explosion-proof structure of at least one of the battery cells.

11. The battery device according to claim 10, characterized in that: There are a plurality of the connecting parts, and the second explosion-proof structure of each battery cell is arranged opposite to at least one of the connecting parts.

12. The battery device according to claim 11, characterized in that: Along the first direction, the heat exchange mechanism is located on the same side of the plurality of battery cells, and the end surface of each battery cell provided with the second explosion-proof structure is arranged opposite to the heat exchange mechanism.

13. The battery device according to claim 12, characterized in that: A plurality of battery cells form at least one battery column, and a plurality of battery cells in each battery column are arranged in sequence along a second direction, and the first direction is perpendicular to the second direction. The exhaust channel has at least one sub-exhaust channel extending along the second direction, and the sub-exhaust channel and the plurality of battery cells in the corresponding battery column are arranged relative to each other. A plurality of connecting parts form at least one connecting part column, and a plurality of connecting parts in each connecting part column are arranged in sequence along the second direction. Along the first direction, each sub-exhaust channel is arranged corresponding to at least one connecting part column.

14. The battery device according to claim 13, characterized in that: The plurality of battery cells form a plurality of battery columns, which are arranged in sequence along a third direction; the exhaust channel comprises a plurality of sub-exhaust channels, which are arranged in sequence along the third direction, and the plurality of sub-exhaust channels correspond one-to-one to the plurality of battery columns; the plurality of connecting portions form a plurality of connecting portion columns, which correspond one-to-one to the plurality of sub-exhaust channels; and the first direction, the second direction and the third direction are perpendicular to each other.

15. The battery device according to claim 14, characterized in that: The exhaust channel further has a confluence channel, the confluence channel extends along the third direction, a plurality of the sub-exhaust channels are all connected to the confluence channel, and the confluence channel is used to connect to the exhaust port.

16. The battery device according to any one of claims 1 to 6, characterized in that: Along the first direction, the heat exchange mechanism is located on the same side of the multiple battery cells, the heat exchange channel includes multiple sub-heat exchange channels, the sub-heat exchange channels extend along the second direction, and the multiple sub-heat exchange channels are arranged in sequence along the third direction. Any two adjacent sub-heat exchange channels are bent, connected and communicated. The exhaust channel has at least one sub-exhaust channel extending along the second direction, and the sub-exhaust channel is provided between at least two adjacent sub-heat exchange channels. The first direction, the second direction and the third direction are perpendicular to each other.

17. The battery device according to claim 1, characterized in that: Each of the battery cells has a second explosion-proof structure. Along the first direction, the heat exchange mechanism is located on the same side of the multiple battery cells. The end face of each battery cell provided with the second explosion-proof structure is arranged opposite to the heat exchange mechanism, and the heat exchange flow channel is arranged corresponding to the shoulder positions of the multiple battery cells.

18. The battery device according to any one of claims 1 to 6, characterized in that: Along the first direction, the heat exchange mechanism is located on the same side of the multiple battery cells, and each battery cell is provided with an end face of an electrode column arranged opposite to the heat exchange mechanism. The heat exchange mechanism is formed with a groove on the side facing the battery cell, and the electrode column of each battery cell is at least partially assembled in the groove.

19. An electrical device, characterized in that: Comprising a battery device according to any one of claims 1-18.

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