Battery device and electric equipment

Abstract

The utility model relates to the technical field of batteries, in particular to a battery device and electric equipment. In the embodiment of the invention, the bending part is arranged on the second plate body, and the bending part is arranged at the interval between at least two adjacent first plate bodies, so that the strength of the cavity wall of the accommodating cavity adjacent to the bending part can be enhanced, and the strength of the heat management component can be improved; and the heat management component can bear higher external pressure and internal fluid pressure. Meanwhile, when the heat management component is subjected to external force or internally generates stress, and the stress reaches the bending part, the transmission direction can be changed along with the structure of the bending part, and the stress concentration condition is improved. Therefore, the structural stability of the heat management component is improved, and the reliability of the battery device is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of batteries, in particular to a battery device and an electric equipment. BACKGROUND

[0002] Energy saving and emission reduction is the key to the sustainable development of the automobile industry. Electric vehicles have become an important part of the sustainable development of the automobile industry due to their energy saving and environmental protection advantages. For electric vehicles, battery technology is an important factor for their development.

[0003] In the development of battery technology, how to improve the reliability of the battery device is a problem that needs to be solved in battery technology. CONTENT OF THE INVENTION

[0004] Therefore, the present application provides a battery device and an electric equipment to improve the reliability of the battery device.

[0005] In a first aspect, the present application provides a battery monomer. The battery device comprises a battery monomer and a thermal management component for adjusting the temperature of the battery monomer, and the thermal management component comprises at least one thermal management unit. The thermal management unit comprises: a plurality of first plate bodies arranged at intervals along a first direction; and a second plate body provided on the plurality of first plate bodies along a second direction, the second plate body and each first plate body defining a containing cavity for containing a heat exchange medium, and all containing cavities are independent of each other; wherein the second plate body has a bending portion, and the bending portion is arranged at an interval between at least two adjacent first plate bodies along the first direction; and the first direction and the second direction intersect each other.

[0006] In the technical scheme of the present application, by arranging the bending portion on the second plate body and arranging the bending portion at the interval between at least two adjacent first plate bodies, the strength of the cavity wall of the containing cavity adjacent to the bending portion can be enhanced, thereby improving the strength of the thermal management component, so that the thermal management component can withstand greater external pressure and internal fluid pressure. At the same time, when the thermal management component is subjected to external force or internal stress, the stress will change the transmission direction along with the change in the structure of the bending portion when the stress reaches the bending portion, thereby improving the stress concentration. Therefore, the structural stability of the thermal management component is improved, thereby improving the reliability of the battery device.

[0007] In some embodiments, in the case where the bending portion is arranged between two adjacent containing cavities, at least part of the cavity wall opposite to each other of the at least two adjacent containing cavities along the first direction is composed of part of the bending portion located between the at least two adjacent containing cavities.

[0008] In this way, the bending portion can be used to reduce the space occupied by the first plate body, thereby facilitating the obtaining of a larger containing cavity, and further improving the heat management effect of the thermal management component.

[0009] In some embodiments, the bending portion comprises a first side wall and a second side wall oppositely arranged along a first direction, and a connecting portion connecting the first side wall and the second side wall; the first side wall and the second side wall are both arranged in a bending manner relative to the connecting portion; in the case that the bending portion is arranged between two adjacent accommodating cavities, at least part of one of the cavity walls of the two adjacent accommodating cavities opposite to each other along the first direction is formed by at least part of the first side wall, and at least part of the other cavity wall is formed by at least part of the second side wall.

[0010] In this way, by configuring the bending portion to comprise the first side wall, the second side wall and the connecting portion, the stress can be guided to transmit from multiple paths, and the situation of stress concentration is further improved. At the same time, since at least part of the first side wall and at least part of the second side wall respectively form the cavity walls of the corresponding accommodating cavities, the space occupied by the first plate body can be further reduced, thereby further facilitating obtaining larger accommodating cavities, and further improving the heat management effect of the heat management component.

[0011] In some embodiments, along the second direction, the first side wall and the second side wall are located on the same side of the connecting portion.

[0012] In this way, the structure of the formed bending portion not only facilitates enhancing the stability and structural strength of the heat management unit, but also facilitates manufacturing the bending portion.

[0013] In some embodiments, the heat management unit has a first side and a second side oppositely arranged along a third direction, and the bending portion is arranged extending from the first side to the second side; the first direction, the second direction and the third direction intersect with each other.

[0014] In this way, since the bending portion is arranged extending from the first side to the second side, the bending portion has continuity, which can provide a more complete and continuous conduction path for the stress, and is conducive to enhancing the overall stress resistance of the heat management unit and reducing the risk of damage such as cracking and deformation. At the same time, such a continuous bending portion can be realized by a one-time forming process (such as stamping, bending, etc.), thereby simplifying the manufacturing process and improving the manufacturing efficiency.

[0015] In some embodiments, the heat management unit further comprises a reinforcing structure; the reinforcing structure is arranged on a side of the first plate body away from the second plate body along the second direction.

[0016] In this way, by arranging the reinforcing structure, the strength of the heat management unit can be further enhanced, thereby improving the reliability of the heat management unit. At the same time, since the reinforcing structure is located on the side of the first plate body away from the second plate body along the second direction, the space in the accommodating cavity will not be occupied, thereby facilitating improving the heat management effect.

[0017] In some embodiments, the reinforcing structure is integrally formed with the first plate body; and / or the reinforcing structure is provided with a plurality of recesses independent of each other and recessed towards the first plate body along the second direction from a side of the first plate body.

[0018] By integrally forming the reinforcing structure and the first plate body, not only the manufacturing process can be simplified, but also the reinforcing structure and the first plate body form a continuous whole, which can resist deformation to a greater extent and improve the stability and reliability of the whole. By providing the recesses on the reinforcing structure, the weight of the reinforcing structure can be reduced, and the recesses can also absorb and buffer the acting force.

[0019] In some embodiments, the battery cell includes a first wall and a pressure relief mechanism provided on the first wall; the first wall and the second plate body contact each other from a side of the first plate body, each pressure relief mechanism corresponds to at least one bending portion; the first wall and the bending portion corresponding to the pressure relief mechanism on the first wall define a communication channel; the communication channel communicates with the outside space of both the battery cell and the thermal management unit; the normal projection of the pressure relief mechanism on the reference plane and the normal projection of the communication channel on the reference plane have an overlapping part, and the reference plane is a plane perpendicular to the second direction.

[0020] In this way, when the pressure relief mechanism discharges gas, the gas can be discharged through the communication channel, thereby facilitating the discharge of gas and slowing down the spread of thermal runaway.

[0021] In some embodiments, the normal projection of the pressure relief mechanism on the reference plane is located within the range of the normal projection of the communication channel on the reference plane.

[0022] In this way, the communication channel can be substantially arranged opposite to the pressure relief mechanism, so that when the pressure relief mechanism discharges gas, the gas can be discharged more quickly from the communication channel.

[0023] In some embodiments, the second direction and the vertical direction are parallel to each other, and the first wall is located at the bottom side of the battery cell.

[0024] In this way, the thermal management component is located at the bottom of the battery cell, which not only facilitates the formation of a more uniform temperature field at the bottom of the battery cell for thermal management of the battery cell, but also does not occupy the top space of the battery cell, facilitating the arrangement of related electronic components on the top of the battery cell, and realizing more compact integrated design as a whole.

[0025] In some embodiments, the accommodation cavity has an inflow channel and an outflow channel that are in communication with each other; in the same thermal management unit, the inflow channel and the outflow channel of the same accommodation cavity are arranged along the first direction.

[0026] Therefore, the heat exchange medium can form a flow path with a certain direction in the accommodating cavity, and the heat management effect is enhanced, and the space layout is more compact.

[0027] In some embodiments, the plurality of first plate bodies include a first target plate body and a second target plate body, and the first target plate body and the second target plate body are arranged alternately along the first direction; in the same heat management unit, the inflow channel and the outflow channel corresponding to the first target plate body are arranged in sequence along a direction from the first target plate body to the last target plate body, and the outflow channel and the inflow channel corresponding to the second target plate body are arranged in sequence.

[0028] In this way, the temperature of the region adjacent to the two first plate bodies tends to be consistent, thereby facilitating the improvement of the uniformity of the overall heat management effect.

[0029] In some embodiments, in the same heat management unit, the first target plate body is the first target plate body, and the last target plate body is the second target plate body.

[0030] Since the heat exchange medium flows into the inflow channel and flows out of the outflow channel, heat exchange is performed with the battery monomer, so that there is a difference between the temperature of the region corresponding to the inflow channel and the temperature of the region corresponding to the outflow channel. In this way, when the outflow channel is located at the outermost side of the heat management unit, the inflow channel is closer to the outer side of the heat management unit, so that heat exchange can be performed between the inflow channel and the outer side of the heat management unit, thereby reducing the temperature difference between the regions corresponding to the inflow channel and the outflow channel, and facilitating the improvement of the uniformity of the heat management component.

[0031] In some embodiments, the heat management unit further comprises a flow disturbance structure arranged in the outflow channel; and the flow disturbance structure is arranged closer to the outlet of the outflow channel than to the inlet of the outflow channel.

[0032] As the heat exchange is performed between the heat management unit and the corresponding battery monomer, and the heat exchange medium flows in the accommodating cavity with a certain temperature loss, the heat exchange medium close to the outlet of the outflow channel has a certain temperature difference with the heat exchange medium close to the inlet of the inflow channel. Since the flow disturbance structure can disturb the heat exchange medium close to the outlet in the outflow channel, the flow time of the heat exchange medium close to the outlet of the outflow channel can be prolonged, and the laminar flow state of the heat exchange medium can be broken, so as to promote the mixing between heat exchange media with different temperatures, thereby further reducing the temperature difference between the heat exchange medium close to the outlet of the outflow channel and the heat exchange medium close to the inlet of the inflow channel, improving the uniformity of the heat management component, and thereby improving the overall heat management effect.

[0033] In some embodiments, the outflow channel is longitudinally arranged; the outflow channel is provided with an inlet of the outflow channel at one end of the longitudinal direction of the outflow channel and an outlet of the outflow channel at the other end; in the same accommodating cavity, the inlet of the outflow channel is in communication with the outlet of the inflow channel; the outflow channel is provided with a turbulence area close to the outlet of the outflow channel, and the turbulence area is provided with a turbulence structure; along the longitudinal direction of the outflow channel, the ratio of the size of the turbulence area to the size of the outflow channel is 0.25 to 0.5.

[0034] In this way, the flow of the heat exchange medium has a certain stability while improving the uniformity of the heat management component. In addition, the space occupied by the turbulence structure can be reduced, which is beneficial to improve the volume of the accommodating cavity, thereby further improving the heat management effect.

[0035] In some embodiments, in the same accommodating cavity, the turbulence structure and the corresponding first plate body are integrally formed.

[0036] In this way, not only is the turbulence structure easy to manufacture, but the stability and reliability of the turbulence structure can also be improved.

[0037] In some embodiments, in the same accommodating cavity, along the first direction, the size of the inflow channel is smaller than the size of the outflow channel.

[0038] In this way, the flow rate of the heat exchange medium entering the inflow channel can be higher, and after entering the outflow channel, the heat exchange medium can form a velocity difference and shear force with the surrounding fluid, thereby producing a more obvious disturbance effect. This disturbance can break the laminar flow state of the fluid, allowing different temperature fluids to mix more fully with each other, accelerating heat transfer and exchange, and helping to improve the uniformity of the entire heat management component.

[0039] In some embodiments, the heat management unit further comprises: a plurality of partition walls, all of the partition walls and all of the accommodating cavities being arranged in one-to-one correspondence, the partition walls being arranged in the corresponding accommodating cavities and dividing the corresponding accommodating cavities into the inflow channel and the outflow channel in communication; a plurality of connecting walls, all of the connecting walls and all of the accommodating cavities being arranged in one-to-one correspondence, the connecting walls being arranged in the outflow channel of the corresponding accommodating cavities and dividing the outflow channel into a plurality of sub-flow passages in communication with each other; wherein, in the same accommodating cavity, along the first direction, the ratio of the size of the inflow channel to any two of the sizes of all the sub-flow passages is 0.9 to 1.1.

[0040] In this way, by dividing the outflow channel into a plurality of sub-flow passages in communication with each other and controlling the ratio of the size of the inflow channel to any two of the sizes of all the sub-flow passages, the heat exchange medium can have approximately the same flow rate when entering any one of the inflow channel and all the sub-flow passages, which is beneficial to reduce the pressure fluctuation in the accommodating cavity, thereby not only improving the service life of the heat management unit, but also reducing the energy consumption of transporting the heat exchange medium.

[0041] In some embodiments, the partition wall, the connecting wall and the corresponding first plate body are integrally formed in the same accommodating cavity.

[0042] In this way, the partition wall and the connecting wall can be conveniently manufactured, and the stability and reliability of the partition wall and the connecting wall can be improved.

[0043] In some embodiments, a plurality of heat management units are provided, and all the heat management units are arranged at intervals in the first direction.

[0044] In this way, a space can be formed between two adjacent heat management units, thereby reducing the space occupied by the heat management component. The space can be used to avoid other components in the battery device, thereby improving the internal space utilization of the battery device and making the overall structure more compact.

[0045] In some embodiments, the battery device further comprises: a box body including a box main body and a support beam arranged in the box main body, the support beam and the box main body jointly defining an accommodating space for accommodating the battery monomer and the heat management component, the support beam having a first cavity and a second cavity independent of each other; and a liquid inlet connector and a liquid outlet connector, both arranged in the support beam; the interior of the liquid inlet connector is in communication with the first cavity, and the interior of the liquid outlet connector is in communication with the second cavity; wherein the accommodating cavity has an inflow passage and an outflow passage in communication with each other, the inlet of the inflow passage is in communication with the first cavity, and the outlet of the outflow passage is in communication with the second cavity.

[0046] In this way, not only can the structural strength of the box body be enhanced by the support beam, but also the inflow and outflow of the heat exchange medium can be achieved by utilizing the internal space of the support beam, thereby improving the space utilization.

[0047] In some embodiments, the support beam has a first region and a second region other than the first region; the first cavity and the second cavity are located in the first region, and the battery device further comprises a reinforcing portion arranged in the second region.

[0048] In this way, by arranging the reinforcing portion in the region outside the region where the first cavity and the second cavity are located, the structural strength of the support beam can be improved, and the lightweight of the support beam can be realized.

[0049] In some embodiments, the reinforcing portion has a plurality of recessed structures; and / or the reinforcing portion and the support beam are integrally formed; and / or the reinforcing portion is located on the side of the support beam away from the battery monomer.

[0050] By configuring the reinforcing portion to have a plurality of recessed structures, the surface area and structural complexity of the reinforcing portion can be increased, the deformation resistance and load bearing capacity of the support beam can be improved without adding too much weight. When subjected to external forces, the recessed structures can disperse stress, improve stress concentration, and make the reinforcing portion less likely to break or be damaged, thereby enhancing the strength and stability of the overall structure. By configuring the reinforcing portion and the support beam as an integrally formed structure, not only is the manufacturing process facilitated, but the stability and strength of the overall structure are also improved. By arranging the reinforcing portion on the side of the support beam facing away from the battery monomer, the support beam can be directly in contact with the battery monomer, the support beam can be used to resist the expansion force of the battery monomer, and the structure of the reinforcing portion can be designed, thereby facilitating the control of the strength of the overall structure while achieving lightweight structure.

[0051] In some embodiments, the support beam extends along a first direction, the thermal management unit has a connecting end arranged along a third direction, the connecting end is connected to one side of the support beam along a second direction, and the inlet of the inflow channel and the outlet of the outflow channel are arranged on the connecting end; the first direction, the second direction, and the third direction intersect with each other.

[0052] In this way, since the thermal management unit is connected to the support beam, not only is it convenient to connect the inflow channel and the first cavity and to connect the outflow channel and the second cavity, but a more stable overall structure can also be formed, thereby enhancing the overall rigidity and improving the impact resistance.

[0053] In some embodiments, the projection of the inlet of the inflow channel on a reference plane is located within the projection range of the first cavity on the reference plane; the reference plane is a plane perpendicular to the second direction; and / or, the projection of the outlet of the outflow channel on the reference plane is located within the projection range of the second cavity on the reference plane; the reference plane is a plane perpendicular to the second direction.

[0054] In this way, the inlets of all the inflow channels can be located on the same side of the first cavity and / or the inlets of all the outflow channels can be located on the same side of the second cavity, thereby facilitating a more compact layout of the overall structure.

[0055] In some embodiments, the thermal management unit further comprises a flange structure; the flange structure is arranged on the connecting end and located on the side of the support beam facing away from the battery monomer.

[0056] In this way, by arranging the flange structure on the side of the support beam facing away from the battery monomer, the flange structure can provide support to the support beam when the support beam is subjected to the expansion force of the battery monomer or when the side of the support beam facing the battery monomer is subjected to other external forces, thereby facilitating the improvement of the structural strength of the overall structure.

[0057] In some embodiments, the flange structure is connected to the side of the support beam away from the battery monomer; and / or, the flange structure and the second plate body are an integral forming structure.

[0058] In this way, since the flange structure is connected to the support beam, the connection strength of the overall structure can be increased, thereby improving the stability and reliability of the overall structure. By configuring the flange structure and the second plate body as an integral forming structure, not only is the flange structure facilitated in manufacture, but the strength and stability of the overall structure are also improved.

[0059] In some embodiments, the box body further comprises a reinforcing beam; the reinforcing beam is arranged on the side of the support beam away from the battery monomer and is connected to the box body.

[0060] In this way, by arranging the reinforcing beam, the structural strength of the support beam can be further improved, thereby improving the reliability of the box body.

[0061] In some embodiments, the liquid inlet connector is arranged on the side of the support beam away from the battery monomer, and a reinforcing beam is arranged on one side of the liquid inlet connector; and / or, the liquid outlet connector is arranged on the side of the support beam away from the battery monomer, and a reinforcing beam is arranged on one side of the liquid outlet connector; and / or, the reinforcing beam and the support beam are an integral forming structure; and / or, the material of the reinforcing beam comprises plastic.

[0062] In this way, since the liquid inlet connector and the reinforcing beam are arranged on the same side, and a reinforcing beam is arranged on one side of the liquid inlet connector, not only can the space on the side of the support beam away from the battery monomer be further improved, but the overall strength and stability of the liquid inlet connector can also be increased by using the reinforcing beam, thereby reducing the risk of deformation and rupture due to external force, and prolonging the service life of the liquid inlet connector. Since the liquid outlet connector and the reinforcing beam are arranged on the same side, and a reinforcing beam is arranged on one side of the liquid outlet connector, not only can the space on the side of the support beam away from the battery monomer be further improved, but the overall strength and stability of the liquid outlet connector can also be increased by using the reinforcing beam, thereby reducing the risk of deformation and rupture due to external force, and prolonging the service life of the liquid outlet connector. By configuring the reinforcing beam and the support beam as an integral forming structure, not only is the reinforcing beam facilitated in manufacture, but the strength and stability of the overall structure are also improved. By controlling the material of the reinforcing beam, the reinforcing beam not only has certain mechanical properties and mechanical properties, but also has lightweight characteristics, thereby not only increasing the overall structural strength by using the reinforcing beam, but also facilitating the lightweight of the battery device.

[0063] In some embodiments, the liquid inlet connector and the support beam are an integral forming structure; and / or, the liquid outlet connector and the support beam are an integral forming structure; and / or, the material of the liquid inlet connector comprises plastic; and / or, the material of the liquid outlet connector comprises plastic; and / or, the material of the support beam comprises plastic.

[0064] By setting the liquid inlet connector and the support beam as an integral structure, not only is the liquid inlet connector convenient to manufacture, but also the overall structure strength and stability are improved. By setting the liquid outlet connector and the support beam as an integral structure, not only is the liquid outlet connector convenient to manufacture, but also the overall structure strength and stability are improved. By controlling the material of the liquid inlet connector, the liquid inlet connector has lightweight characteristics while having certain mechanical properties and mechanical properties, so that the overall structure strength can be increased through the liquid inlet connector, and the lightweight of the battery device is also facilitated. By controlling the material of the liquid outlet connector, the liquid outlet connector has lightweight characteristics while having certain mechanical properties and mechanical properties, so that the overall structure strength can be increased through the liquid outlet connector, and the lightweight of the battery device is also facilitated. By controlling the material of the support beam, the support beam has lightweight characteristics while having certain mechanical properties and mechanical properties, so that the overall structure strength can be increased through the support beam, and the lightweight of the battery device is also facilitated.

[0065] In some embodiments, the first plate body and the second plate body are welded or glued; and / or, the material of the first plate body comprises plastic; and / or, the material of the second plate body comprises metal.

[0066] By welding or gluing the first plate body and the second plate body, not only is the connection convenient, but also the first plate body and the second plate body have certain connection strength and certain connection reliability. By controlling the material of the first plate body, the first plate body has lightweight characteristics while having certain mechanical properties and mechanical properties, so that the overall structure strength can be increased through the first plate body, and the lightweight of the battery device is also facilitated. By controlling the material of the second plate body, not only is heat exchange facilitated, but also the structural strength of the heat management unit is improved, thereby improving the reliability of the heat management unit.

[0067] In a second aspect, the application provides a power consumption device comprising the battery device in any of the above embodiments.

[0068] The power consumption device also has the advantages of the battery device in any of the above embodiments, which will not be repeated here.

[0069] The above description is only a summary of the technical solutions of the application. In order to more clearly understand the technical means of the application, the application can be implemented according to the content of the specification, and in order to make the above and other purposes, characteristics and advantages of the application more obvious and easy to understand, the following specific embodiments of the application are described. BRIEF DESCRIPTION OF DRAWINGS

[0070] Various other advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the implementation. The accompanying drawings are included to provide a description of the implementation and are not intended to limit the scope of the application. Moreover, in the drawings, like reference numerals denote like parts throughout the several views. In the drawings:

[0071] Figure 1 A schematic diagram of a vehicle structure in some embodiments of the application;

[0072] Figure 2 A schematic diagram of an exploded view of a battery device in some embodiments of the application;

[0073] Figure 3 A schematic diagram of an exploded view of a battery cell in some embodiments of the application;

[0074] Figure 4 A schematic diagram of a perspective view of a partial structure of a battery device in some embodiments of the application;

[0075] Figure 5 A schematic diagram of an exploded view of a partial structure of a battery device in some embodiments of the application;

[0076] Figure 6 A schematic diagram of a perspective view of a thermal management component in some embodiments of the application;

[0077] Figure 7 A schematic diagram of a perspective view of a thermal management unit in some embodiments of the application;

[0078] Figure 8 A schematic diagram of a partial enlarged view in G1; Figure 7

[0079] A schematic diagram of a perspective view of a second plate in some embodiments of the application; Figure 9

[0080] A schematic diagram of a partial enlarged view in G2; Figure 10 Figure 9 A schematic diagram of a perspective view of a first plate of a thermal management component in some embodiments of the application;

[0081] Figure 11 A schematic diagram of a partial enlarged view in G3;

[0082] Figure 12 Figure 11 A schematic diagram of a perspective view of a first plate of a thermal management unit in some embodiments of the application;

[0083] Figure 13 A schematic diagram of a perspective view of a first plate of a thermal management unit in some embodiments of the application;

[0084] ​​Figure 14 FIG. 1 is a schematic diagram of a battery cell in accordance with some embodiments of the present application; Figure 13 FIG. 2 is a schematic diagram of a partial enlarged structure at G4 in FIG. 1 ;

[0085] Figure 15 FIG. 3 is a schematic diagram of a perspective structure of a battery cell in accordance with some embodiments of the present application;

[0086] Figure 16 FIG. 4 is a schematic diagram of a projection of a pressure relief mechanism and a projection of a communication passage in accordance with some embodiments of the present application;

[0087] Figure 17 FIG. 5 is a schematic diagram of a perspective structure of a thermal management component in accordance with some embodiments of the present application;

[0088] Figure 18 FIG. 6 is a schematic diagram of a perspective structure of a support beam and related structures cooperating with each other in accordance with some embodiments of the present application;

[0089] Figure 19 FIG. 7 is a schematic diagram of a perspective structure of a support beam, a thermal management component and related structures cooperating with each other in accordance with some embodiments of the present application;

[0090] Figure 20 FIG. 8 is a schematic diagram of a cross-sectional structure of a support beam in a cross-sectional manner in accordance with some embodiments of the present application;

[0091] Figure 21 FIG. 9 is a schematic diagram of a cross-sectional structure of a support beam in another cross-sectional manner in accordance with some embodiments of the present application; Figure 20 FIG. 10 is a schematic diagram of a partial enlarged structure at G5 in FIG. 9;

[0092] Figure 22 FIG. 11 is a schematic diagram of a cross-sectional structure of a support beam in still another cross-sectional manner in accordance with some embodiments of the present application;

[0093] Figure 23 FIG. 12 is a schematic diagram of a cross-sectional structure of a support beam in yet another cross-sectional manner in accordance with some embodiments of the present application; Figure 22 FIG. 13 is a schematic diagram of a partial enlarged structure at G6 in FIG. 12;

[0094] Figure 24 FIG. 14 is a schematic diagram of a cross-sectional structure of a support beam in yet another cross-sectional manner in accordance with some embodiments of the present application;

[0095] Figure 25 FIG. 15 is a schematic diagram of a cross-sectional structure of a support beam in yet another cross-sectional manner in accordance with some embodiments of the present application;

[0096] Figure 26 FIG. 16 is a schematic diagram of a projection of an inflow passage and a projection of a first cavity in accordance with some embodiments of the present application;

[0097] Figure 27 FIG. 17 is a schematic diagram of a projection of an outflow passage and a projection of a second cavity in accordance with some embodiments of the present application.

[0098] BRIEF DESCRIPTION OF THE DRAWINGS:

[0099] Vehicle 1;

[0100] Battery device 10, controller 20, motor 30;

[0101] Battery cell 100, housing 110, shell 111, end cover 112, electrode terminal et, electrode assembly 120, first wall b1, pressure relief mechanism 130;

[0102] Box 200, first box part 210, second box part 220, box body D, support beam 230, first area Z1, second area Z2, first cavity K1, second cavity K2, containing space Q2, reinforcing beam 240;

[0103] Thermal management component 300, thermal management unit 310, first side t1, second side t2, first plate body 311, first target plate body M1, second target plate body M2, second plate body 312, bending part W, communication channel I, first side wall W1, second side wall W2, connecting part W3, containing cavity Q1, inflow channel P1, third size H3, first inlet j1, first outlet c1, outflow channel P2, fourth size H4, sub-flow channel P21, fifth size H5, second inlet j2, second outlet c2, reinforcing structure 313, recess x, turbulence structure 314, turbulence area RZ, first size H1, second size H2, partition wall 315, connecting wall 316, connecting end L, flange structure 317;

[0104] Liquid inlet connector 400;

[0105] Liquid outlet connector 500;

[0106] Reinforcing part 600, recess structure 610;

[0107] Connecting piece 700;

[0108] Mounting piece 800;

[0109] Reference surface E, first projection y1, second projection y2, third projection y3, fourth projection y4, fifth projection y5, sixth projection y6;

[0110] First direction F1, second direction F2, third direction F3. DETAILED DESCRIPTION

[0111] The embodiments of the technical scheme of the present application will be described in detail below with reference to the drawings. The following embodiments are only used to more clearly illustrate the technical scheme of the present application, and therefore only serve as examples, and cannot limit the protection scope of the present application.

[0112] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs; the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of this application; the use of the terms "including," "comprising," or "having" and variations thereof herein is intended to be broad and encompass the terms "consisting of" and "consisting essentially of" and variations thereof. Unless otherwise noted, the terms "including" and "comprising" are open-ended and do not exclude the presence of unrecited elements or limitations.

[0113] In the description of the embodiments of the present application, the technical terms "first", "second", etc. are only used to distinguish different objects, and cannot be understood as indicating or implying relative importance or implicitly indicating the number, specific order or primary and secondary relationship of the indicated technical features. In the description of the embodiments of the present application, the meaning of "a plurality of" is two or more, unless otherwise explicitly and specifically limited.

[0114] Reference herein to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment can be included in at least one embodiment of the application. The appearance of the phrase in various places in the specification does not necessarily all refer to the same embodiment, nor is it necessarily independent or alternative embodiments to each other. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0115] In the description of the embodiments of the present application, the term "and / or" is only a description of the association relationship of the associated objects, which means that there can be three relationships, for example, A and / or B, which can represent the three cases of A alone, A and B together, and B alone. In addition, the character " / " in this paper generally represents that the front and rear associated objects are a "or" relationship.

[0116] In the description of the embodiments of the present application, the term "a plurality of" refers to two or more (including two), and similarly, "a plurality of groups" refers to two or more groups (including two groups), and "a plurality of pieces" refers to two or more pieces (including two pieces).

[0117] In the description of the embodiments of the present application, the technical terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the embodiments of the present application and simplifying the description, and therefore cannot be understood as limiting the embodiments of the present application. The orientation or position of the device or element indicated, and therefore cannot be understood as limiting the embodiments of the present application.

[0118] In the description of the embodiments of the present application, unless otherwise explicitly specified and limited, the technical terms "mount", "connect", "connect", "fix", and other terms should be understood in a broad sense, for example, can be fixedly connected, or can be detachably connected, or integrated; can be mechanically connected, or electrically connected; can be directly connected, or indirectly connected through an intermediate medium, can be the internal communication of two elements or the interaction relationship of two elements. For those skilled in the art, the specific meaning of the above terms in the embodiments of the present application can be understood according to the specific circumstances.

[0119] At present, from the development of market situation, the application of power battery is more and more widely. Power battery is not only applied to energy storage power supply system of water power, thermal power, wind power and solar power station, but also widely used in electric bicycles, electric motorcycles, electric vehicles and other electric vehicles, military equipment and aerospace and other fields. With the continuous expansion of the application field of power battery, the demand of its market is also increasing.

[0120] Generally, heat management components are arranged inside the battery device to manage the heat of the battery monomer, so that the battery monomer can be charged and discharged in a more suitable temperature range, thereby facilitating the improvement of the cycle life and efficiency of the battery. If the structural strength of the heat management component is insufficient, deformation may occur when subjected to force, affecting the heat management effect of the heat management component, thereby affecting the performance and stability of the battery monomer, and further affecting the reliability of the battery device.

[0121] Therefore, in order to improve the reliability of the battery device, the embodiments of the present application provide a battery device, which improves the reliability of the battery device by configuring a heat management component with higher structural strength. Specifically, the structure of the heat management component is improved to enhance the structural strength of the heat management component, so that the reliability of the battery device with the heat management component is further improved.

[0122] The battery device disclosed in the embodiments of the present application can be used in electric equipment such as vehicles, ships or aircraft, but is not limited to this. The power supply system of the electric equipment can be composed of the battery device disclosed in the present application and other components, so that the reliability of the battery device is improved.

[0123] The embodiments of the present application provide a power consumption equipment using a battery device as a power supply. The power consumption equipment is a device that uses electric energy as energy and realizes corresponding functions by consuming electric energy. Exemplarily, the power consumption equipment can be but is not limited to mobile phones, tablets, notebook computers, electric toys, electric tools, electric cars, electric cars, ships, spacecraft, etc. Among them, the electric toy can include fixed or mobile electric toys, such as game consoles, electric car toys, electric ship toys and electric plane toys, etc. Spacecraft can include airplanes, rockets, space shuttles and spacecraft, etc.

[0124] The power consuming device in the embodiments of the present application can include a device body and a power supply device, the power supply device is used to supply power to the device body, and the power supply device can include a battery cell or a battery pack. The device body refers to the main structure that consumes power to realize corresponding functions. For example, the power consuming device can be a mobile phone, and the device body is the part that can realize communication functions, and the part that can realize communication functions is powered by the battery cell or the battery pack. For example, the power consuming device can be a car, and the device body is the part that can provide a seat for a person and can drive on the road, and the part that can provide a seat for a person and can drive on the road is powered by the battery cell or the battery pack. The power supply device refers to a device that can output power. For example, the battery pack composed of the battery cell can output power.

[0125] The following embodiments are described by taking a vehicle as an example for convenience of description.

[0126] Please refer to Figure 1 , Figure 1 is a schematic structural diagram of a vehicle 1 in some embodiments of the present application. The vehicle 1 can be a fuel car, a gas car or a new energy car, and the new energy car can be a pure electric car, a hybrid car or a range extended car. The vehicle 1 is internally provided with a battery device 10, which can be arranged at the bottom, head or tail of the vehicle 1. The battery device 10 can be used for power supply of the vehicle 1, for example, the battery device 10 can be used as the operating power supply of the vehicle 1. The vehicle 1 can also include a controller 20 and a motor 30, and the controller 20 is used to control the battery device 10 to supply power to the motor 30, for example, to meet the power demand of the vehicle 1 during starting, navigation and driving.

[0127] In some embodiments of the present application, the battery device 10 can not only be used as the operating power supply of the vehicle 1, but also be used as the driving power supply of the vehicle 1, instead of or partially instead of fuel or natural gas to provide driving power for the vehicle 1.

[0128] In order to meet different power consumption requirements, the battery device 10 can include a plurality of battery cells 100, and the battery cell 100 refers to the smallest unit of a battery module or a battery pack. The plurality of battery cells 100 can be connected in series and / or parallel through electrode terminals et for various applications. The battery mentioned in the present application includes a battery module or a battery pack. Among them, the plurality of battery cells 100 can be connected in series or parallel or mixed connection, and the mixed connection refers to the mixture of series connection and parallel connection. The battery device 10 can also be referred to as a battery pack. In the embodiments of the present application, the plurality of battery cells 100 can directly constitute a battery pack, or first constitute a battery module, and then the battery module constitutes a battery pack.

[0129] Please refer to Figure 2 ,Figure 2 Figure 1 is a schematic diagram of an exploded structure of a battery device 10 according to some embodiments of the present application. Figure 2 In some embodiments, the battery device 10 can include a plurality of battery modules and a box 200, and the plurality of battery modules are accommodated inside the box 200. The box 200 is used to accommodate the battery cells 100 to avoid the influence of liquid or other foreign matters on the charging or discharging of the battery cells 100. The box 200 can be a simple cuboid or a cylinder or a sphere or the like, or a complex cuboid or a cylinder or a sphere or the like composed of simple cuboids or cylinders or spheres or the like, and the embodiments of the present application are not limited in this regard. The material of the box 200 can be an alloy material such as an aluminum alloy or an iron alloy, or a polymer material such as polycarbonate or polyisocyanurate foam plastic, or a composite material such as glass fiber and epoxy resin, and the embodiments of the present application are not limited in this regard.

[0130] In some embodiments, the box 200 can include a first box part 210 and a second box part 220, and the first box part 210 and the second box part 220 are mutually covered to jointly define a space for accommodating the battery cells 100. The second box part 220 can be a hollow structure with one end open, and the first box part 210 can be a plate-shaped structure, and the first box part 210 is covered on the open side of the second box part 220 to jointly define the space for accommodating the battery cells 100 with the second box part 220. The first box part 210 and the second box part 220 can also be hollow structures with one side open, and the open side of the first box part 210 is covered on the open side of the second box part 220.

[0131] The battery module can include a plurality of battery cells 100, and the plurality of battery cells 100 can be connected in series or in parallel or in a mixed manner to form the battery module, and the plurality of battery modules can be connected in series or in parallel or in a mixed manner to form the battery. In the present application, the battery cell 100 can include a lithium ion battery, a sodium ion battery or a magnesium ion battery device, and the embodiments of the present application are not limited in this regard. The battery cell 100 can be in the shape of a cylinder, a flat body, a cuboid or other shapes, and the embodiments of the present application are not limited in this regard. The battery cell 100 can be in the shape of a cylinder, a flat body, a cuboid or other shapes, and the embodiments of the present application are not limited in this regard. However, for the sake of simplicity of description, the following embodiments will be described by taking the square battery cell as an example.

[0132] Please refer to Figure 3 , Figure 3 Figure 1 is a schematic diagram of an exploded structure of a battery device 10 according to some embodiments of the present application. The battery device 10 refers to the smallest unit that constitutes the battery device 10. As shown in Figure 3 , the battery cell 100 includes a housing 110, an electrode assembly 120 and other functional components.

[0133] The shell 110 is a component for forming an internal environment of the battery cell 100. The shell 110 can include a casing 111 and an end cover 112. The casing 111 is a component for cooperating with the end cover 112 to form the internal environment of the battery cell 100. The formed internal environment can be used to accommodate the electrode assembly 120, electrolyte (not shown in the figure), and other components. The casing 111 and the end cover 112 can be independent components, and an opening can be provided on the casing 111, and the end cover 112 is made to cover the opening to form the internal environment of the battery cell 100. Without limitation, the end cover 112 and the casing 111 can also be integrated, specifically, the end cover 112 and the casing 111 can be formed into a common connecting surface before other components enter the casing, and when it is necessary to seal the inside of the casing 111, the end cover 112 is made to cover the casing 111. The casing 111 can be of various shapes and sizes, such as a cuboid, a cylinder, a hexagonal prism, etc. Specifically, the shape of the casing 111 can be determined according to the specific shape and size of the electrode assembly 120. The material of the casing 111 can be various, such as copper, iron, aluminum, stainless steel, aluminum alloy, plastic, etc., and the embodiments of the present application do not make special limitations on this. The opening of the casing 111 can be located on the side or bottom of the casing 111, and the embodiments of the present application do not make limitations on this.

[0134] The end cover 112 refers to a component that can be fitted on the opening of the shell 111 to isolate the internal environment of the battery monomer 100 from the external environment. Without limitation, the shape of the end cover 112 can be adapted to the shape of the shell 111 to fit the shell 111. For example, the end cover 112 can be made of a material with certain hardness and strength, such as aluminum alloy, so that the end cover 112 is not easily deformed when subjected to extrusion collision, so that the battery monomer 100 can have higher structural strength, and the safety performance can also be improved. The end cover 112 can be provided with functional components such as electrode terminals et. The electrode terminals et can be used to electrically connect with the electrode assembly 120 for outputting or inputting the electrical energy of the battery monomer 100. In some embodiments, the end cover 112 can also be provided with a pressure relief mechanism for relieving the internal pressure of the battery monomer 100 when the internal pressure or temperature of the battery monomer 100 reaches a threshold value. In some embodiments, the end cover 112 can also be provided with a liquid injection hole for injecting electrolyte into the interior of the battery monomer 100. Of course, the electrode terminals et and the liquid injection hole can also be provided on the shell 111. The material of the end cover 112 can also be various, such as copper, iron, aluminum, stainless steel, aluminum alloy, plastic, etc., and the embodiments of the present application do not make special limitations thereon. In some embodiments, an insulating member can also be provided on the inner side of the end cover 112, which can be used to isolate the electrical connection components in the shell 111 from the end cover 112 to reduce the risk of short circuit. For example, the material of the insulating member can be plastic, rubber, etc. In some embodiments, the shell 111 and / or the end cover 112 can also be provided with a pressure relief mechanism 130. The pressure relief mechanism 130 is used to relieve the internal pressure of the battery monomer 100 when the internal pressure or temperature of the battery monomer 100 reaches a threshold value, so as to improve the safety performance of the battery monomer 100. The threshold value is different according to different design requirements. The threshold value can depend on the material of one or more of the electrode assembly 120 and the separator in the battery monomer 100. The pressure relief mechanism can take the form of a relief valve, a gas valve, a pressure relief valve or a safety valve, and can specifically take the form of a pressure-sensitive or temperature-sensitive element or structure, i.e. when the internal pressure or temperature of the battery monomer 100 reaches a threshold value, the pressure relief mechanism 130 performs an action or a weak structure provided in the pressure relief mechanism 130 is broken, thereby forming an opening or passage for the internal pressure or temperature to be relieved. For example, the pressure relief mechanism 130 is shown as being provided on the end cover 112, but is not limited thereto. Figure 3 For example, the pressure relief mechanism 130 is shown as being provided on the end cover 112, but is not limited thereto.

[0135] The electrode assembly 120 is a component in which electrochemical reactions occur in the battery cell 100. One or more electrode assemblies 120 can be included in the case 110. The electrode assembly 120 is mainly formed by stacking a positive electrode sheet and a negative electrode sheet, and an insulator is generally provided between the positive electrode sheet and the negative electrode sheet. The positive electrode sheet and the negative electrode sheet have portions with active materials that constitute a main body of the electrode assembly 120, and portions without active materials that each constitute a tab. The positive electrode tab and the negative electrode tab can be located together at one end of the main body or at opposite ends of the main body, and can be located at the top of the main body or at the side wall of the main body, without being particularly limited. During charging and discharging of the battery device 10, the positive electrode active material and the negative electrode active material react with the electrolyte, and the tabs are connected to the electrode terminal et to form a current loop. The insulator is used to separate the positive electrode sheet and the negative electrode sheet, and to prevent electrons in the battery cell 100 from freely passing through, allowing ions in the electrolyte to freely flow between the positive electrode sheet and the negative electrode sheet. The insulator can be a thin film made of PE (polyethylene), PP (polypropylene), or the like.

[0136] According to some embodiments of the present application, please refer to Figure 4 to Figure 6 , Figure 4 FIG. 1 is a schematic diagram of a perspective structure of a part of a battery device 10 according to some embodiments of the present application, Figure 5 FIG. 2 is a schematic diagram of an exploded structure of a part of the battery device 10 according to some embodiments of the present application, Figure 6 FIG. 3 is a schematic diagram of a perspective structure of a thermal management component 300 according to some embodiments of the present application. The present application provides a battery device 10, which includes a battery cell 100 and a thermal management component 300 for adjusting the temperature of the battery cell 100, and the thermal management component 300 includes at least one thermal management unit 310. The thermal management unit 310 includes a plurality of first plate bodies 311 and a second plate body 312. The plurality of first plate bodies 311 are arranged at intervals along a first direction F1. The second plate body 312 covers the plurality of first plate bodies 311 along a second direction F2, and the second plate body 312 and each first plate body 311 define a receiving cavity Q1 for receiving a heat exchange medium, and all receiving cavities Q1 are independent of each other. The second plate body 312 has a bending portion W. Along the first direction F1, the bending portion W is provided at an interval between at least two adjacent first plate bodies 311. The first direction F1 and the second direction F2 intersect each other. In the embodiments of the present application, the first direction F1 and the second direction F2 are perpendicular to each other.

[0137] The heat management component 300 is a component for heat management of the battery monomer 100. The heat management component 300 can include one heat management unit 310, or can include multiple heat management units 310. When the heat management component 300 includes multiple heat management units 310, the multiple heat management units 310 can be arranged according to the arrangement of the battery monomer 100. For example, the heat management component 300 includes one heat management unit 310. Figure 6 For example, the heat management component 300 includes multiple heat management units 310.

[0138] The first plate body 311 in the heat management unit 310 can be provided with two, three or other numbers, which are not specifically limited here. For example, the first plate body 311 in the heat management unit 310 is provided with two. Figure 6 and Figure 7 For example, Figure 7 is a perspective structural schematic diagram of the heat management unit 310 in some embodiments of the present application, illustrating the case where the first plate body 311 in the heat management unit 310 is provided with two. The first plate body 311 and the second plate body 312 in the heat management unit 310 are components provided in a substantially plate shape. The first plate body 311 and the second plate body 312 are the main structural parts of the heat management component 300, and are the main carriers for the heat management of the heat management component 300. It can be understood that the accommodation cavity Q1 is the internal structure of the heat management component 300, and is not convenient to understand in Figure 7 , the accommodation cavity Q1 inside the heat management component 300 is indicated by a dashed line. All the accommodation cavities Q1 in the heat management unit 310 are independent of each other, which means that all the accommodation cavities Q1 are isolated from each other and not communicated with each other. Of course, the inlets of all the accommodation cavities Q1 can be communicated with the same heat exchange medium input component, or can be communicated with different heat exchange medium input components, which are not specifically limited here. Similarly, the outlets of all the accommodation cavities Q1 can be communicated with the same heat exchange medium output component, or can be communicated with different heat exchange medium output components, which are not specifically limited here.

[0139] For reference, Figure 8 to Figure 10 , Figure 8 is Figure 7 is a local enlarged structural schematic diagram of G1 in Figure 9 is a perspective structural schematic diagram of the second plate body 312 in some embodiments of the present application, Figure 10 is Figure 9The local enlarged structure diagram at G2 in FIG. 13 shows that the second plate body 312 has a bending portion W. The bending portion W refers to a portion of the second plate body 312 that has a bending or turning feature. The bending portion W changes the flat plate structure of the second plate body 312, which not only enhances the structural strength of the thermal management unit 310, but also enables the thermal management unit 310 to better disperse stress when subjected to external force, reducing the possibility of deformation and damage, and improving the overall vibration resistance and impact resistance of the thermal management unit 310. For example, the bending manner of the bending portion W can include at least one of a right-angle bending, an arc bending, and a multi-segment bending, without specific limitation here. The right-angle bending refers to a bending with an angle of about 90 degrees, the arc bending refers to the bending portion W having an arc surface, and the multi-segment bending refers to a bending with multiple angles and directions.

[0140] The "bending portion W is provided at the interval between at least two adjacent first plate bodies 311 in the first direction F1" means that the bending portion W can be provided at the interval between each two adjacent first plate bodies 311, or the bending portion W can be provided at the interval between part of the two adjacent first plate bodies 311, without specific limitation here.

[0141] Therefore, by providing the bending portion W on the second plate body 312 and the bending portion W at the interval between at least two adjacent first plate bodies 311 in the first direction F1, the strength of the cavity wall of the accommodation cavity Q1 adjacent to the bending portion W can be enhanced, thereby improving the strength of the thermal management component 300, so that the thermal management component 300 can withstand greater external pressure and internal fluid pressure. At the same time, when the thermal management component 300 is subjected to external force or internal stress, the stress will change the transmission direction along with the structure of the bending portion W when the stress reaches the bending portion W, improving the stress concentration situation. Therefore, the structural stability of the thermal management component 300 is improved, thereby improving the reliability of the battery device 10.

[0142] According to some embodiments of the present application, please continue to refer to Figure 7 to Figure 10 , in combination with referring to Figure 11 and Figure 12 , Figure 11 FIG. 14 is a perspective structural schematic diagram of the first plate body 311 of the thermal management component 300 in some embodiments of the present application from one viewing angle, Figure 12 FIG. 15 is a perspective structural schematic diagram of the first plate body 311 of the thermal management component 300 in some embodiments of the present application from another viewing angle, Figure 11 FIG. 16 is a local enlarged structural schematic diagram at G3 in FIG. 15. In the case where the bending portion W is provided between two adjacent accommodation cavities Q1, at least part of the cavity wall of at least two adjacent accommodation cavities Q1 opposite to each other in the first direction F1 is composed of the part of the bending portion W located between the two adjacent accommodation cavities Q1.

[0143] Since at least part of the cavity wall of the corresponding accommodation cavity Q1 is constituted by part of the bending portion W, the part of the first plate body 311 forming the cavity wall of the accommodation cavity Q1 can be less. For example, as shown in Figure 12 , it is illustrated that the part of the two first plate bodies 311 opposite to each other along the first direction F1 is not provided with the structure constituting the cavity wall of the corresponding accommodation cavity Q1.

[0144] In this way, the bending portion W can be used to reduce the space occupied by the first plate body 311, thereby facilitating the obtaining of a larger accommodation cavity Q1, and further improving the heat management effect of the heat management component 300.

[0145] According to some embodiments of the present application, please continue to refer to Figure 10 , the bending portion W includes a first side wall W1 and a second side wall W2 opposite to each other along the first direction F1, and a connecting portion W3 connecting the first side wall W1 and the second side wall W2. The first side wall W1 and the second side wall W2 are both bent relative to the connecting portion W3. In the case where the bending portion W is provided between the two adjacent accommodation cavities Q1, along the first direction F1, at least part of one of the cavity walls opposite to each other of the at least two adjacent accommodation cavities Q1 is constituted by at least part of the first side wall W1, and at least part of the other is constituted by at least part of the second side wall W2.

[0146] For example, as shown in Figure 8 , Figure 10 and Figure 12 , it is illustrated that the part of the two first plate bodies 311 opposite to each other along the first direction F1 is not provided with the structure constituting the cavity wall of the corresponding accommodation cavity Q1. One of the cavity walls opposite to each other of the two adjacent accommodation cavities Q1 is constituted by at least part of the first side wall W1, and the other is constituted by at least part of the second side wall W2.

[0147] In this way, by configuring the bending portion W to include the first side wall W1, the second side wall W2 and the connecting portion W3, the stress can be guided to be transmitted from multiple paths, further improving the situation of stress concentration. At the same time, since at least part of the first side wall W1 and at least part of the second side wall W2 constitute the cavity wall of the corresponding accommodation cavity Q1, the space occupied by the first plate body 311 can be further reduced, thereby further facilitating the obtaining of a larger accommodation cavity Q1, and further improving the heat management effect of the heat management component 300.

[0148] According to some embodiments of the present application, please continue to refer to Figure 8 and Figure 10 , along the second direction F2, the first side wall W1 and the second side wall W2 are located on the same side of the connecting portion W3.

[0149] For example, as shown in Figure 10For example, the first side wall W1, the second side wall W2 and the connecting portion W3 can all be configured as flat plates, the first side wall W1 and the connecting portion W3 are vertically arranged, and the second side wall W2 and the connecting portion W3 are vertically arranged. Of course, the first side wall W1 and the connecting portion W3 can be arranged at other angles, and the second side wall W2 and the connecting portion W3 can also be arranged at other angles. In other embodiments, the first side wall W1, the second side wall W2 and the connecting portion W3 can also be configured as curved plate structures, which are not limited here.

[0150] Since the first side wall W1 and the second side wall W2 are located on the same side of the connecting portion W3, it is convenient to form the bending portion W on the second plate body 312 by processes such as cold bending forming process, hot bending forming process, stamping forming process or bending forming process. The specific manufacturing process is not limited here.

[0151] In this way, the structure of the formed bending portion W not only helps to enhance the stability and structural strength of the heat management unit 310, but also helps to manufacture the bending portion W.

[0152] Of course, in other embodiments, along the second direction F2, the first side wall W1 and the second side wall W2 can also be located on different sides of the connecting portion W3, which is not limited here.

[0153] According to some embodiments of the present application, please continue to refer to Figure 6 , Figure 7 and Figure 9 , the heat management unit 310 has a first side t1 and a second side t2 arranged oppositely along a third direction F3, and the bending portion W is arranged extending from the first side t1 to the second side t2. The first direction F1, the second direction F2 and the third direction F3 intersect with each other.

[0154] For example, the first direction F1, the second direction F2 and the third direction F3 are perpendicular to each other. Of course, in other embodiments, the first direction F1, the second direction F2 and the third direction F3 can also not be perpendicular to each other, which is not limited here.

[0155] In this way, since the bending portion W is arranged extending from the first side t1 to the second side t2, the bending portion W has continuity, which can provide a more complete and continuous conduction path for stress, and help to enhance the overall stress resistance of the heat management unit 310, and reduce the risk of damage such as cracking and deformation. At the same time, since one end of the bending portion W is located at the first side t1 and the other end is located at the second side t2, a structure can be formed which penetrates the first side t1 of the heat management unit 310 and the second side t2 of the heat management unit 310 along the extension direction of the bending portion W. Such a continuous bending portion W can be realized by a one-time forming process (such as stamping, bending, etc.), so as to simplify the manufacturing process and improve the manufacturing efficiency.

[0156] According to some embodiments of the present application, please refer to Figure 13 and Figure 14 , Figure 13 is a schematic view of the first plate body 311 of the thermal management unit 310 in another perspective view, Figure 14 is Figure 13 a local enlarged view of G4 in FIG. 11, the thermal management unit 310 further comprises a reinforcing structure 313, the reinforcing structure 313 is arranged on the side of the first plate body 311 away from the second plate body 312 along the second direction F2.

[0157] It can be understood that the perspective view in Figure 13 is the perspective view of the back of the first plate body 311 in the perspective view shown in Figure 11 .

[0158] The reinforcing structure 313 is a structure that can be used to enhance the structural strength. Since the reinforcing structure 313 is located on the side of the first plate body 311 away from the second plate body 312 along the second direction F2, the reinforcing structure 313 is located outside the accommodation cavity Q1.

[0159] In this way, by arranging the reinforcing structure 313, the strength of the thermal management unit 310 can be further enhanced, thereby improving the reliability of the thermal management unit 310. At the same time, since the reinforcing structure 313 is located on the side of the first plate body 311 away from the second plate body 312 along the second direction F2, it will not occupy the space inside the accommodation cavity Q1, thereby facilitating the improvement of the thermal management effect.

[0160] In addition, when the thermal management component 300 is arranged at the bottom of the battery cell 100, if the electrolyte leaks, the reinforcing structure 313 will contact the electrolyte before the first plate body 311, thereby protecting the first plate body 311.

[0161] According to some embodiments of the present application, please continue to refer to Figure 13 and Figure 14 , the reinforcing structure 313 and the first plate body 311 are an integral structure; and / or the reinforcing structure 313 is arranged on the side of the first plate body 311 away from the second direction F2, and is provided with a plurality of recesses x which are independent of each other, and the recesses x are recessed towards the first plate body 311 along the second direction F2.

[0162] The integral molding refers to that multiple components are made of the same material and are made as a whole. In the integral molding process, the material is usually continuously distributed in the whole structure. Since there is no connecting point, the integral molding structure can better withstand external force and stress distribution, reduce the risk of structural failure caused by loosening or damage of the connecting part W3, and can improve the structural strength and stability. At the same time, the steps of manufacturing and assembling multiple components can be reduced, which not only facilitates the manufacturing, but also shortens the production cycle and improves the production efficiency. The integral molding mode can include injection molding, extrusion molding and the like, which is not specifically limited here.

[0163] The recesses x on the reinforcing part 600 can be made by an integral molding process, or the reinforcing part 600 can be made first and then part of the structure on the reinforcing part 600 is removed to form, which is not specifically limited here. For example, the structure of the plurality of recesses x can be arranged such that the reinforcing part 600 is arranged in a substantially grid or lattice shape. Of course, the reinforcing part 600 can also have other configurations, which is not specifically limited here.

[0164] By integral molding the reinforcing structure 313 and the first plate body 311, not only the manufacturing process can be simplified and the manufacturing is facilitated, but also the reinforcing structure 313 and the first plate body 311 form a continuous whole, which can resist deformation to a greater extent and improve the overall stability and reliability. By providing the recesses x on the reinforcing structure 313, not only the weight of the reinforcing structure 313 can be reduced, but also the recesses x can absorb and buffer the acting force.

[0165] According to some embodiments of the present application, please continue to refer to Figure 7 to Figure 10 , and in combination with referring to Figure 15 and Figure 16 , Figure 15 is a perspective view of the battery monomer 100 in some embodiments of the present application, Figure 16 is a schematic view of the projection of the pressure relief mechanism 130 and the projection of the communication channel I in some embodiments of the present application. The battery monomer 100 includes a first wall b1 and a pressure relief mechanism 130 arranged on the first wall b1. The first wall b1 and the side of the second plate body 312 away from the first plate body 311 are in contact with each other. Each pressure relief mechanism 130 corresponds to at least one bending part W. The first wall b1 and the bending part W corresponding to the pressure relief mechanism 130 on the first wall b1 define a communication channel I. The communication channel I is in communication with the outside space of both the battery monomer 100 and the heat management unit 310. The orthographic projection of the pressure relief mechanism 130 on the reference surface E and the orthographic projection of the communication channel I on the reference surface E have an overlapping part, and the reference surface E is a plane perpendicular to the second direction F2.

[0166] The normal projection of the pressure relief mechanism 130 on the reference surface E is a first projection y1, and the normal projection of the communication channel I on the reference surface E is a second projection y2. The first projection y1 and the second projection y2 have an overlapping portion. For example, the first projection y1 is located within the second projection y2. Of course, part of the first projection y1 can overlap with the second projection y2, which is not specifically limited herein. Figure 16 For example, the first projection y1 is located within the second projection y2. Of course, part of the first projection y1 can overlap with the second projection y2, which is not specifically limited herein.

[0167] The communication channel I is in communication with the outer space of both the battery cell 100 and the thermal management unit 310, that is, when there is fluid in the communication channel I, the fluid can flow out of the communication channel I to the outer space of both the battery cell 100 and the thermal management unit 310, so that the fluid located in the communication channel I can be discharged by using the communication channel I.

[0168] Thus, in the case that the pressure relief mechanism 130 discharges gas, the gas can be discharged through the communication channel I, thereby facilitating the discharge of the gas and slowing down the spread of thermal runaway, so that the safety performance of the battery device 10 can be improved. In addition, since the gas discharged by the pressure relief mechanism 130 usually has a very high temperature, and the communication channel I can block the gas discharged by the pressure relief mechanism 130 from contacting the first plate body 311, thereby improving the damage of the gas discharged by the pressure relief mechanism 130 to the first plate body 311. Of course, if electrolyte leakage occurs, the communication channel I can also block the electrolyte from contacting the first plate body 311, thereby reducing the damage of the electrolyte to the thermal management unit 310.

[0169] According to some embodiments of the present application, please continue to refer to Figure 16 , the normal projection of the pressure relief mechanism 130 on the reference surface E is located within the normal projection range of the communication channel I on the reference surface E. That is, the first projection y1 is located within the range of the second projection y2.

[0170] Thus, the communication channel I can be arranged substantially opposite to the pressure relief mechanism 130, so that in the case that the pressure relief mechanism 130 discharges gas, the gas can be more quickly discharged from the communication channel I.

[0171] According to some embodiments of the present application, please continue to refer to Figure 4 , Figure 5 and Figure 15 , the second direction F2 and the vertical direction are parallel to each other, and the first wall b1 is located at the bottom side of the battery cell 100.

[0172] For example, the aforementioned end cover 112 can be arranged at the top side of the battery cell 100, or can be arranged at the side of the battery cell 100, which is not specifically limited herein. For example, in Figure 15In the illustrated case, the end cover 112 is located at the top side of the battery cell 100, and the first wall b1 is located at the bottom side of the battery cell 100, and the bottom wall of the shell 111 constitutes the first wall b1.

[0173] In this way, the heat management component 300 is located at the bottom of the battery cell 100, which not only facilitates the formation of a more uniform temperature field at the bottom of the battery cell 100 to manage the heat of the battery cell 100, but also does not occupy the top space of the battery cell 100, facilitating the arrangement of relevant electronic components on the top of the battery cell 100, and achieving more compact integrated design as a whole. It can be understood that at this time, the battery cell 100 is carried on the heat management component 300, and since the heat management component 300 provided by the embodiment of the present application has higher structural strength, it is more conducive to carrying the battery cell 100, so that the overall structure is more stable and reliable.

[0174] According to some embodiments of the present application, please continue to refer to Figure 11 and Figure 12 The accommodation cavity Q1 has an inflow channel P1 and an outflow channel P2 that are in communication with each other. In the same heat management unit 310, the inflow channel P1 and the outflow channel P2 of the same accommodation cavity Q1 are arranged along the first direction F1.

[0175] It should be noted that, in order to show the inflow channel P1 and the outflow channel P2, the second plate body 312 is not shown in Figure 11 and Figure 12 It can be understood that the side of the second plate body 312 facing the accommodation cavity Q1 constitutes part of the cavity wall of the accommodation cavity Q1.

[0176] In this way, not only can the heat exchange medium form a flow path with a certain directionality in the accommodation cavity Q1, enhancing the heat management effect, but also makes the spatial layout more compact.

[0177] According to some embodiments of the present application, please continue to refer to Figure 11 and Figure 12 The plurality of first plate bodies 311 includes a first target plate body M1 and a second target plate body M2. Along the first direction F1, the first target plate body M1 and the second target plate body M2 are arranged alternately. In the same heat management unit 310, along the direction from the first first plate body 311 to the last first plate body 311, the inflow channel P1 and the outflow channel P2 corresponding to the first target plate body M1 are arranged in sequence, and the outflow channel P2 and the inflow channel P1 corresponding to the second target plate body M2 are arranged in sequence.

[0178] The phrase "the first target plate body M1 and the second target plate body M2 are arranged alternately along the first direction F1" means that, along the first direction F1, the plate body adjacent to the first target plate body M1 is the second target plate body M2, and the plate body adjacent to the second target plate body M2 is the first target plate body M1. Along the first direction F1, the first target plate body M1 and the second target plate body M2 can be arranged in the order of the first target plate body M1, the second target plate body M2, the first target plate body M1, the second target plate body M2, the first target plate body M1, and so on, or in the order of the second target plate body M2, the first target plate body M1, the second target plate body M2, the first target plate body M1, the second target plate body M2, and so on, and the present application does not make a specific limitation in this regard.

[0179] For example, as shown in Figure 11 and Figure 12 , the first target plate body M1 and the second target plate body M2 are arranged alternately along the first direction F1.

[0180] It can be understood that, for the inflow passage P1 and the outflow passage P2 of the same accommodating cavity Q1, the temperature of the heat exchange medium in the inflow passage P1 and the temperature of the heat exchange medium in the outflow passage P2 are different. By arranging the first target plate body M1 and the second target plate body M2 alternately, the temperature of the regions adjacent to the two first plate bodies 311 is consistent, thereby facilitating the uniformity of the overall thermal management effect.

[0181] According to some embodiments of the present application, please continue to refer to Figure 11 and Figure 12 , in the same thermal management unit 310, the first first plate body 311 is the first target plate body M1, and the last first plate body 311 is the second target plate body M2.

[0182] For example, as shown in Figure 12 , the inflow passage P1, the outflow passage P2, the outflow passage P2, and the inflow passage P1 are arranged in sequence along the first direction F1.

[0183] During the process of the heat exchange medium flowing into the inflow passage P1 and flowing out of the outflow passage P2, the heat exchange medium exchanges heat with the battery monomer 100, so that the temperature of the region corresponding to the inflow passage P1 is different from the temperature of the region corresponding to the outflow passage P2. In this way, when the outmost side of the thermal management unit 310 is the inflow passage P1, the inflow passage P1 is closer to the outer side of the thermal management unit 310, so that the inflow passage P1 and the outer side of the thermal management unit 310 can exchange heat, thereby reducing the temperature difference between the regions corresponding to the inflow passage P1 and the outflow passage P2, and further facilitating the uniformity of the thermal management component 300.

[0184] According to some embodiments of the present application, please continue to refer toFigure 11 and Figure 12 The heat management unit 310 further comprises a turbulence structure 314 arranged in the outflow passage P2. The turbulence structure 314 is arranged closer to the outlet of the outflow passage P2 than to the inlet of the outflow passage P2.

[0185] The turbulence structure 314 is a structure design for interfering and controlling fluid flow, which can achieve the optimization of the kinetic performance of the fluid by changing the flow state of the fluid, such as flow rate, flow direction, pressure distribution, etc. The turbulence structure 314 can be a staggered arrangement of protrusions as shown in Figure 12 , of course, the turbulence structure 314 can also be other structure forms, which are not specifically limited here.

[0186] With the heat exchange between the heat management unit 310 and the corresponding battery monomer 100, and the temperature loss of the heat exchange medium flowing in the containing cavity Q1, the heat exchange medium close to the outlet of the outflow passage P2 has a certain temperature difference with the heat exchange medium close to the inlet of the inflow passage P1. Since the turbulence structure 314 will disturb the heat exchange medium close to the outlet of the outflow passage P2, not only can it prolong the flow time of the heat exchange medium close to the outlet of the outflow passage P2, but also can break the laminar flow state of the heat exchange medium, promote the mixing between heat exchange media of different temperatures, so as to further reduce the temperature difference between the heat exchange medium close to the outlet of the outflow passage P2 and the heat exchange medium close to the inlet of the inflow passage P1, improve the uniformity of the heat management component 300, and thus can improve the heat management effect as a whole.

[0187] According to some embodiments of the present application, please continue to refer to Figure 11 and Figure 12 The outflow passage P2 is arranged along the longitudinal direction. The outflow passage P2 is provided with an inlet of the outflow passage P2 at one end along the longitudinal direction of the outflow passage P2, and is provided with an outlet of the outflow passage P2 at the other end. In the same containing cavity Q1, the inlet of the outflow passage P2 is in communication with the outlet of the inflow passage P1. The outflow passage P2 has a turbulence region RZ arranged close to the outlet of the outflow passage P2, and the turbulence region RZ is provided with the turbulence structure 314. Along the longitudinal direction of the outflow passage P2, the ratio of the size of the turbulence region RZ to the size of the outflow passage P2 is 0.25 to 0.5.

[0188] For example, in combination with reference to Figure 8 , Figure 11 and Figure 12 The inlet of the inflow passage P1 is a first inlet j1, the outlet of the inflow passage P1 is a first outlet c1, the inlet of the outflow passage P2 is a second inlet j2, the outlet of the outflow passage P2 is a second outlet c2, and the first outlet c1 and the second inlet j2 are in communication. The turbulence region RZ is arranged close to the second outlet c2.

[0189] The outflow channel P2 is longitudinally arranged, the longitudinal direction being relative to the outflow channel P2. The turbulence region RZ refers to a region provided with the turbulence structure 314. For example, the longitudinal direction of the outflow channel P2 and the third direction F3 are parallel to each other, the size of the turbulence region RZ along the third direction F3 is a first size H1, the size of the outflow channel P2 along the third direction F3 is a second size H2, and the ratio of the first size H1 to the second size H2 is 0.25 to 0.5. For example, the ratio of the first size H1 to the second size H2 can be 0.25, 0.3, 0.32, 0.35, 0.38, 0.4, 0.45, 0.48, or 0.5. The ratio of the first size H1 to the second size H2 can be any value within the range of 0.25 to 0.5, which is not limited herein. Figure 11 Figure 12

[0190] In this way, the flow of the heat exchange medium has a certain stability while improving the uniformity of the heat management component 300. In addition, the space occupied by the turbulence structure 314 can be reduced, which is beneficial to increasing the volume of the accommodation cavity Q1, thereby further improving the heat management effect.

[0191] According to some embodiments of the present application, please continue to refer to Figure 11 Figure 12 In the same accommodation cavity Q1, the turbulence structure 314 and the corresponding first plate body 311 are an integral structure.

[0192] In this way, not only is the turbulence structure 314 easy to manufacture, but the stability and reliability of the turbulence structure 314 can also be improved.

[0193] According to some embodiments of the present application, please continue to refer to Figure 12 In the same accommodation cavity Q1, along the first direction F1, the size of the inflow channel P1 is smaller than the size of the outflow channel P2.

[0194] The size of the inflow channel P1 along the first direction F1 is a third size H3, and the size of the outflow channel P2 along the first direction F1 is a fourth size H4. The third size H3 is smaller than the fourth size H4, which can also be understood in combination with the subsequent schematic Figure 21

[0195] In this way, the flow rate of the heat exchange medium entering the inflow channel P1 can be higher, and after entering the outflow channel P2, the heat exchange medium can form a velocity difference and shear force with the surrounding fluid, thereby producing a more obvious disturbance effect. This disturbance can break the laminar flow state of the fluid, so that the fluids of different temperatures are more fully mixed with each other, accelerating the transfer and exchange of heat, which is helpful to improve the uniformity of the entire heat management component 300.

[0196] ​​​​According to some embodiments of the present application, please continue to refer to Figure 11 and Figure 12 The heat management unit 310 further comprises a plurality of partition walls 315 and a plurality of connecting walls 316. All the partition walls 315 and all the accommodation cavities Q1 are arranged in a one-to-one correspondence, the partition wall 315 is arranged in the corresponding accommodation cavity Q1, and the corresponding accommodation cavity Q1 is divided into the inflow passage P1 and the outflow passage P2 in communication. All the connecting walls 316 and all the accommodation cavities Q1 are arranged in a one-to-one correspondence, the connecting wall 316 is arranged in the outflow passage P2 of the corresponding accommodation cavity Q1, and the outflow passage P2 is divided into a plurality of sub-flow channels P21 in communication with each other. Among them, in the same accommodation cavity Q1, the ratio of the size of the inflow passage P1 and any two of the sizes of all the sub-flow channels P21 along the first direction F1 is 0.9 to 1.1.

[0197] The size of the sub-passage along the first direction F1 is the fifth size H5, and the fourth size H4 is the sum of all the fifth sizes H5. The ratio of the third size H3 and the fifth size H5 is 0.9 to 1.1, or the ratio of the fifth size H5 and the fourth size H4 is 0.9 to 1.1, and the ratio of the fifth size H5 corresponding to any two sub-paths is 0.9 to 1.1. The ratio can be 0.9, 0.95, 1, 1.05 or 1. For example, the fourth size H4 and the fifth size H5 are equal. It can be understood in combination with the schematic diagram shown later Figure 21 .

[0198] For example, Figure 11 and Figure 12 The connecting wall 316 is arranged in the outflow passage P2 of the corresponding accommodation cavity Q1, and the outflow passage P2 is divided into two sub-flow channels P21 in communication with each other, the inflow passage P1 and the sub-passage are longitudinally arranged along the third direction F3, and the inflow passage P1 and the sub-passage are arranged along the first direction F1. Of course, the inflow passage P1 and the sub-passage can also be arranged without extending in a straight line, and can also be arranged along a curved direction, which is not limited here.

[0199] In this way, by dividing the outflow passage P2 into a plurality of sub-flow channels P21 in communication with each other, and controlling the ratio of the size of the inflow passage P1 and any two of the sizes of all the sub-flow channels P21, the heat exchange medium can have substantially the same flow rate when entering any one of the inflow passage P1 and all the sub-flow channels P21, which is beneficial to reduce the pressure fluctuation in the accommodation cavity Q1, thereby not only improving the service life of the heat management unit 310, but also reducing the energy consumption of the heat exchange medium.

[0200] According to some embodiments of the present application, please continue to refer to Figure 11 and Figure 12The partition wall 315, the connecting wall 316 and the corresponding first plate body 311 are integrally formed in the same accommodating cavity Q1.

[0201] In this way, the partition wall 315 and the connecting wall 316 are not only convenient to manufacture, but also improve the stability and reliability of the partition wall 315 and the connecting wall 316.

[0202] Of course, in other embodiments, the partition wall 315 and the connecting wall 316 can also be integrally formed with the second plate body 312, which is not specifically limited here. It can be understood that when the partition wall 315, the connecting wall 316 and the corresponding first plate body 311 are integrally formed, the partition wall 315 and the connecting wall 316 can be used to increase the contact area between the second plate body 312 and the first plate body 311, thereby facilitating the connection of the first plate body 311 and the second plate body 312.

[0203] According to some embodiments of the present application, please continue to refer to Figure 6 The heat management unit 310 is provided in plurality, and all the heat management units 310 are arranged in the first direction F1.

[0204] In this way, a space can be formed between the two adjacent heat management units 310, thereby reducing the space occupied by the heat management component 300. The space can be used to avoid other components in the battery device 10, thereby improving the utilization rate of the internal space of the battery device 10 and making the overall structure more compact.

[0205] Of course, in other embodiments, please refer to Figure 17 , Figure 17 FIG. 6 is a schematic view of a perspective structure of the heat management component 300 according to some embodiments of the present application. As shown in FIG. 6, the space between the two adjacent heat management units 310 can not be formed, which is not specifically limited here.

[0206] It should be noted that, taking Figure 5 and Figure 6 as examples, when the heat management component 300 as shown in Figure 5 and Figure 6 is used, in combination with the above-mentioned content, please refer to Figure 4 The plurality of battery monomers 100 can be arranged in columns along the first direction F1 and arranged in rows along the third direction F3, wherein the column and the row are relative. All the heat management units 310 are arranged in the first direction, and all the column battery monomers 100 and all the heat management units 310 are arranged one by one. Further, in combination with the content shown in the above-mentioned embodiments, all the battery monomers 100 in each column of battery monomers 100 are connected in communication with the corresponding communication channels I, and form a channel extending along the third direction F3. In this way, a more compact, convenient and heat management structure is formed as a whole.

[0207] Of course, in some other embodiments, each column of battery cells 100 can also be in a non-one-to-one relationship with the heat management units 310. For example, each column of battery cells 100 corresponds to two heat management units 310. For another example, each heat management unit 310 corresponds to two columns of battery cells 100. Moreover, the arrangement of the communication channels I is not limited to the above-mentioned cases. No specific limitation is made herein.

[0208] According to some embodiments of the present application, please continue to refer to Figure 4 and Figure 5 , and refer to Figure 18 , Figure 19 , Figure 18 is a schematic diagram of the three-dimensional structure of the support beam 230 and the related structure cooperating with the support beam 230 in some embodiments of the present application, Figure 19 is a schematic diagram of the three-dimensional structure of the support beam 230, the heat management component 300 and the related structure cooperating with the support beam 230 and the heat management component 300 in some embodiments of the present application, the battery device 10 further comprises a box body 200, a liquid inlet connector 400 and a liquid outlet connector 500. The box body 200 comprises a box body D and a support beam 230 arranged in the box body D, and the support beam 230 and the box body D jointly define an accommodation space Q2 for accommodating the battery cells 100 and the heat management component 300.

[0209] For example, in Figure 4 , the case where the box body D is the second box body 200 part as previously illustrated is illustrated. Among them, the first direction F1, the second direction F2 and the third direction F3 can be the length, width and height directions of the box body 200, but are not limited thereto.

[0210] Please continue to refer to Figure 20 to Figure 23 , Figure 20 is a schematic diagram of the cross-sectional structure of the support beam 230 in a cross-sectional manner in some embodiments of the present application, Figure 21 is a schematic diagram of the enlarged structure of the G5 part in Figure 20 , Figure 22 is a schematic diagram of the cross-sectional structure of the support beam 230 in another cross-sectional manner in some embodiments of the present application, Figure 23 is a schematic diagram of the enlarged structure of the G6 part in Figure 22 . Among them, for example, Figure 20 and Figure 22 , the cross sections in Figure 20 and Figure 22 are parallel to each other and arranged in the third direction F3, that is, Figure 20 and Figure 22 , the cross-sectional structure of the support beam 230 in different cross-sectional depths is illustrated. The support beam 230 has a first cavity K1 and a second cavity K2 which are independent of each other.

[0211] The first cavity K1 and the second cavity K2 are independent of each other, that is, the first cavity K1 and the second cavity K2 are separated from each other in structure, space and function, and each has relatively independent characteristics. For better understanding, refer to Figure 24 and Figure 25 , Figure 24 is a cross-sectional structure schematic diagram of the support beam 230 in another cross-sectional manner in some embodiments of the present application, Figure 25 is a cross-sectional structure schematic diagram of the support beam 230 in another cross-sectional manner in some embodiments of the present application. For example, Figure 24 and Figure 25 The cross sections in Figure 24 and Figure 25 are parallel to each other and arranged along the first direction F1, that is, Figure 24 and Figure 25 schematically show the cross-sectional structure schematic diagram of the support beam 230 at different cross-sectional depths. It can be seen that the first cavity K1 and the second cavity K2 are separated by the internal structure of the support beam 230. For the sake of brevity, Figure 24 and Figure 25 , the cross-sectional lines on the support beam 230 are not shown.

[0212] The liquid inlet connector 400 and the liquid outlet connector 500 are arranged on the support beam 230, the inside of the liquid inlet connector 400 is in communication with the first cavity K1, and the inside of the liquid outlet connector 500 is in communication with the second cavity K2. Among them, the accommodation cavity Q1 has an inflow passage P1 and an outflow passage P2 in communication with each other, the inlet of the inflow passage P1 is in communication with the first cavity K1, and the outlet of the outflow passage P2 is in communication with the second cavity K2. For better understanding, refer to Figure 4 and Figure 5 , the liquid inlet connector 400 and the liquid outlet connector 500 can be used to connect the connecting piece 700, the connecting piece 700 can be arranged to protrude from the box body D, and the connecting piece 700 is used to input and output the heat exchange medium.

[0213] Continue to refer to Figure 21 , Figure 23 to Figure 25 , in Figure 24 and Figure 25In the middle, the arrow shows the flow direction of the heat exchange medium. The heat exchange medium flows out of the liquid inlet joint 400, flows into the first cavity K1, flows into the inlet (i.e., the first inlet j1) of the inflow channel P1 from the first cavity K1, and then flows into the inlet (i.e., the second inlet j2) of the outflow channel P2 from the outlet (i.e., the first outlet c1) of the inflow channel P1, and then flows out of the outlet (i.e., the second outlet c2) of the outflow channel P2 to the second cavity K2, and then flows out of the second cavity K2 to the liquid outlet joint 500. It can be understood that the first cavity K1 has a hole in communication with the inflow channel P1, and the second cavity K2 has a hole in communication with the outflow channel P2. In this way, the first cavity K1 can split the flow of the heat exchange medium, and the second cavity K2 can converge the flow of the heat exchange medium.

[0214] In this way, not only can the structural strength of the box body 200 be enhanced by the support beam 230, but also the inflow and outflow of the heat exchange medium can be achieved by utilizing the internal space of the support beam 230, thereby improving the space utilization.

[0215] According to some embodiments of the present application, please continue to refer to Figure 18 and Figure 19 The support beam 230 has a first region Z1 and a second region Z2 other than the first region Z1. The first cavity K1 and the second cavity K2 are located in the first region Z1, and the battery device 10 further comprises a reinforcing portion 600 arranged in the second region Z2.

[0216] The reinforcing portion 600 is a component that can be used to enhance the structural strength of the support beam 230 as a whole.

[0217] In this way, by arranging the reinforcing portion 600 in the region outside the region where the first cavity K1 and the second cavity K2 are located, not only is it beneficial to enhance the structural strength of the support beam 230, but also it is beneficial to achieve the lightweight of the support beam 230.

[0218] According to some embodiments of the present application, please continue Figure 18 , Figure 20 and Figure 22 The reinforcing portion 600 has a plurality of recessed structures 610; and / or the reinforcing portion 600 and the support beam 230 are integrally formed; and / or the reinforcing portion 600 is located on the side of the support beam 230 away from the battery monomer 100.

[0219] The integrally formed related embodiments can be understood with reference to the processes illustrated in some of the aforementioned embodiments, which will not be described here again.

[0220] By configuring the reinforcing portion 600 to have a plurality of recessed structures 610, not only the surface area and structural complexity of the reinforcing portion 600 can be increased, but also the anti-deformation ability and load-bearing capacity of the support beam 230 can be improved without adding too much weight. When subjected to external force, the recessed structures 610 can disperse stress and improve the situation of stress concentration, so that the reinforcing portion 600 is less likely to be broken or damaged, thereby enhancing the strength and stability of the overall structure. By configuring the reinforcing portion 600 and the support beam 230 as an integrally formed structure, not only the manufacturing is facilitated, but also the stability and strength of the overall structure are improved. By arranging the reinforcing portion 600 on the side of the support beam 230 away from the battery monomer 100, the support beam 230 can be directly in contact with the battery monomer 100, and the support beam 230 can be used to resist the expansion force of the battery monomer 100, which is conducive to increasing the contact area between the support beam 230 and the battery monomer 100, thereby improving the supporting effect of the support beam 230, and facilitating the design of the structure of the reinforcing portion 600, thereby facilitating the control of the light weight of the structure while improving the strength of the overall structure.

[0221] According to some embodiments of the present application, please continue to refer to Figure 19 , the support beam 230 is arranged to extend along the first direction F1, and the heat management unit 310 has a connecting end L arranged along the third direction F3, the connecting end L is connected to one side of the support beam 230 along the second direction F2, and the inlet of the inflow channel P1 and the outlet of the outflow channel P2 are arranged at the connecting end L. The first direction F1, the second direction F2 and the third direction F3 intersect with each other.

[0222] Thus, since the heat management unit 310 is connected to the support beam 230, not only the inflow channel P1 and the first cavity K1 are connected, and the outflow channel P2 and the second cavity K2 are connected, but also a more stable overall structure is formed, the overall rigidity is enhanced, and the impact resistance is improved.

[0223] Of course, in some other embodiments, the connecting end L of the heat management unit 310 can also be connected to one side of the support beam 230 along the third direction F3, which is not specifically limited here. It can be understood that when the connecting end L of the heat management unit 310 is connected to one side of the support beam 230 along the second direction F2, it is more conducive to realizing the connection between the inside of the heat management unit 310 and the first cavity K1 and the second cavity K2 of the support beam 230, and the overall structure can be more compact.

[0224] According to some embodiments of the present application, please continue to refer to Figure 19 to Figure 25 , and refer to Figure 26 and Figure 27 , Figure 26 is a schematic view of the projection of the inflow channel P1 and the projection of the first cavity K1 in some embodiments of the present application, Figure 27For the schematic view of the projection of the outflow channel P2 and the projection of the second cavity K2 in some embodiments of the present application, the orthographic projection of the inlet of the inflow channel P1 on the reference plane E is located within the orthographic projection of the first cavity K1 on the reference plane E; the reference plane E is a plane perpendicular to the second direction F2; and / or, the orthographic projection of the outlet of the outflow channel P2 on the reference plane E is located within the orthographic projection of the second cavity K2 on the reference plane E; the reference plane E is a plane perpendicular to the second direction F2.

[0225] That is, in combination with reference to Figure 26 , the orthographic projection of the inlet of the inflow channel P1 on the reference plane E is a third projection y3, the orthographic projection of the first cavity K1 on the reference plane E is a fourth projection y4, and the third projection y3 is located within the range of the fourth projection y4. In combination with reference to Figure 27 , the orthographic projection of the outlet of the outflow channel P2 on the reference plane E is a fifth projection y5, the orthographic projection of the second cavity K2 on the reference plane E is a sixth projection y6, and the fifth projection y5 is located within the range of the sixth projection y6.

[0226] When the third projection y3 is located within the range of the fourth projection y4 and the fifth projection y5 is located within the range of the sixth projection y6, in combination with reference to Figure 19 , the communication between the corresponding flow channel and the corresponding cavity can be directly achieved by connecting the support beam 230 and the thermal management component 300 in the second direction F2, thereby also facilitating the connection of the support beam 230 and the thermal management component 300.

[0227] In this way, all the inlets of the inflow channels P1 can be located on the same side of the first cavity K1 and / or all the inlets of the outflow channels P2 can be located on the same side of the second cavity K2, thereby facilitating the realization of a more compact layout of the overall structure.

[0228] According to some embodiments of the present application, please continue to refer to 8, Figure 10 and Figure 19 , the thermal management unit 310 further comprises a flange structure 317. The flange structure 317 is arranged at the connection end L and located on the side of the support beam 230 away from the battery monomer 100.

[0229] In this way, by arranging the flange structure 317 on the side of the support beam 230 away from the battery monomer 100, when the support beam 230 is subjected to the expansion force of the battery monomer 100 or is subjected to other acting forces on the side of the support beam 230 facing the battery monomer 100, the flange structure 317 can provide a supporting force acting on the support beam 230, thereby facilitating the improvement of the structural strength of the overall structure.

[0230] According to some embodiments of the present application, please continue to refer to 8, Figure 10 and Figure 19The flange structure 317 is connected to the side of the support beam 230 away from the battery monomer 100; and / or the flange structure 317 and the second plate body 312 are an integrated structure.

[0231] In this way, since the flange structure 317 is connected to the support beam 230, the connection strength of the overall structure can be increased, thereby improving the stability and reliability of the overall structure. By configuring the flange structure 317 and the second plate body 312 as an integrated structure, not only is it beneficial to manufacture the flange structure 317, but it is also beneficial to improve the strength and stability of the overall structure.

[0232] Of course, in other embodiments, the flange structure 317 can also be in abutting relationship with the side of the support beam 230 away from the battery monomer 100, which is not specifically limited here. When the flange structure 317 is connected to the side of the support beam 230 away from the battery monomer 100, it is more beneficial to improve the overall structural strength and reliability.

[0233] According to some embodiments of the present application, please continue to refer to Figure 4 , Figure 5 , Figure 18 and Figure 19 , the box body 200 further comprises a reinforcing beam 240. The reinforcing beam 240 is arranged on the side of the support beam 230 away from the battery monomer 100, and is connected to the box body D.

[0234] In this way, by arranging the reinforcing beam 240, the structural strength of the support beam 230 can be further improved, thereby improving the reliability of the box body 200.

[0235] According to some embodiments of the present application, please continue to refer to Figure 4 , Figure 5 , Figure 18 and Figure 19 , the liquid inlet connector 400 is arranged on the side of the support beam 230 away from the battery monomer 100, and the reinforcing beam 240 is arranged on one side of the liquid inlet connector 400; and / or the liquid outlet connector 500 is arranged on the side of the support beam 230 away from the battery monomer 100, and the reinforcing beam 240 is arranged on one side of the liquid outlet connector 500; and / or the reinforcing beam 240 and the support beam 230 are an integrated structure; and / or the material of the reinforcing beam 240 comprises plastic.

[0236] For example, the liquid inlet connector 400 can be arranged on one side of the reinforcing beam 240 in the second direction F2, specifically, the liquid inlet connector 400 can be arranged on the bottom side of the reinforcing beam 240. The liquid outlet connector 500 can be considered with reference to the liquid inlet connector 400, which will not be described here. In this way, the space on the bottom side of the reinforcing beam 240 can be further utilized.

[0237] For example, the material of the reinforcing beam 240 comprises polyhexamethylene adipamide, polypropylene or polyphenylene sulfide.

[0238] Thus, since the liquid inlet connector 400 and the reinforcing beam 240 are arranged on the same side, and the reinforcing beam 240 is arranged on one side of the liquid inlet connector 400, not only can the space on the side of the support beam 230 away from the battery monomer 100 be further improved, but also the overall strength and stability of the liquid inlet connector 400 can be increased by using the reinforcing beam 240, the risk of deformation and rupture due to external force can be reduced, and the service life of the liquid inlet connector 400 can be prolonged. Since the liquid outlet connector 500 and the reinforcing beam 240 are arranged on the same side, and the reinforcing beam 240 is arranged on one side of the liquid outlet connector 500, not only can the space on the side of the support beam 230 away from the battery monomer 100 be further improved, but also the overall strength and stability of the liquid outlet connector 500 can be increased by using the reinforcing beam 240, the risk of deformation and rupture due to external force can be reduced, and the service life of the liquid outlet connector 500 can be prolonged. By setting the reinforcing beam 240 and the support beam 230 as an integral structure, not only is the reinforcing beam 240 easy to manufacture, but also the strength and stability of the overall structure are improved. By controlling the material of the reinforcing beam 240, the reinforcing beam 240 has certain mechanical properties and mechanical properties while being lightweight, so that the overall structure strength can be increased by the reinforcing beam 240, and the lightweight of the battery device 10 is also facilitated.

[0239] According to some embodiments of the present application, please continue to refer to Figure 4 , Figure 5 , Figure 18 and Figure 19 , the liquid inlet connector 400 and the support beam 230 are an integral structure; and / or, the liquid outlet connector 500 and the support beam 230 are an integral structure; and / or, the material of the liquid inlet connector 400 includes plastic; and / or, the material of the liquid outlet connector 500 includes plastic; and / or, the material of the support beam 230 includes plastic.

[0240] For example, the material of the liquid inlet connector 400 includes polyhexamethylene adipamide, polypropylene or polyphenylene sulfide, the material of the liquid outlet connector 500 includes polyhexamethylene adipamide, polypropylene or polyphenylene sulfide, and the material of the support beam 230 includes polyhexamethylene adipamide, polypropylene or polyphenylene sulfide.

[0241] By setting the liquid inlet connector 400 and the support beam 230 as an integrally formed structure, not only is the liquid inlet connector 400 convenient to manufacture, but also the strength and stability of the overall structure are improved. By setting the liquid outlet connector 500 and the support beam 230 as an integrally formed structure, not only is the liquid outlet connector 500 convenient to manufacture, but also the strength and stability of the overall structure are improved. By controlling the material of the liquid inlet connector 400, the liquid inlet connector 400 has lightweight characteristics while having certain mechanical properties and mechanical properties, so that the overall structure strength can be increased through the liquid inlet connector 400, and the lightweight of the battery device 10 is also facilitated. By controlling the material of the liquid outlet connector 500, the liquid outlet connector 500 has lightweight characteristics while having certain mechanical properties and mechanical properties, so that the overall structure strength can be increased through the liquid outlet connector 500, and the lightweight of the battery device 10 is also facilitated. By controlling the material of the support beam 230, the support beam 230 has lightweight characteristics while having certain mechanical properties and mechanical properties, so that the overall structure strength can be increased through the support beam 230, and the lightweight of the battery device 10 is also facilitated.

[0242] It should be noted that, in combination with reference to Figure 18 The support beam 230, the liquid inlet connector 400, the liquid outlet connector 500, and the reinforcing beam 240 in some embodiments described above can be an integrally formed structure of injection molding, and simultaneously form the first region Z1 and the second region Z2 described above. The first region Z1 can be disposed from the support beam 230 along one side of the second direction F2, and the second region Z2 is disposed around the first region Z1 along both sides of the first direction F1 and one side of the second direction F2. In this way, the support beam 230 and the structure disposed on the support beam 230 are integrated into one structure, which can achieve lightweight while having certain structural strength. Since the integrated structure is an integrally formed structure of injection molding, the low thermal conductivity of plastic can be utilized to improve energy utilization and heat preservation capacity. It can be understood that when the relevant components are integrally formed and integrated on the support beam 230, the risk of connection failure caused by relative displacement between the relevant components and the support beam 230 can be improved, which is beneficial to improve the reliability of the connection, and can reduce the risk of leakage of the heat exchange medium. In addition, a rigid member (such as a metal bracket) can also be embedded in the support beam 230, which can further improve the structural strength of the support beam 230.

[0243] Further, continuing to refer to Figure 18 The mounting member 800 can also be integrally injection molded at both ends of the support beam 230 along the first direction F1, and the support beam 230 can be connected to the box body D through the mounting member 800.

[0244] According to some embodiments of the present application, please continue to refer to 7, Figure 9 and Figure 11The first plate body 311 and the second plate body 312 are connected by welding or gluing; and / or, the material of the first plate body 311 comprises plastic; and / or, the material of the second plate body 312 comprises metal.

[0245] For example, the material of the first plate body 311 comprises polyhexamethylene adipamide, polypropylene, or polyphenylene sulfide, and the material of the second plate body 312 comprises aluminum or stainless steel.

[0246] The first plate body 311 and the second plate body 312 are connected by welding or gluing, which not only facilitates the connection, but also enables the first plate body 311 and the second plate body 312 to have certain connection strength and certain connection reliability. By controlling the material of the first plate body 311, the first plate body 311 can have certain mechanical properties and lightweight characteristics, thereby not only increasing the overall structural strength through the first plate body 311, but also facilitating the lightweight of the battery device 10. By controlling the material of the second plate body 312, it is not only conducive to heat exchange, but also conducive to improving the structural strength of the thermal management unit 310, thereby improving the reliability of the thermal management unit 310.

[0247] It can be understood that when the material of the first plate body 311 comprises plastic and the material of the second plate body 312 comprises metal, by setting the flange structure 317, the spoiler structure 314, the reinforcing structure 313, the bending portion W, the partition wall 315, and the connecting wall 316 illustrated in some of the above embodiments, the thermal management component 300 can have better structural strength, thermal management performance, and lightweight.

[0248] According to some embodiments of the present application, the present application provides a power consumption device comprising the battery device 10 in any of the above embodiments.

[0249] The power consumption device also has the advantages of the battery device 10 in any of the above embodiments, which will not be repeated here.

[0250] Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present application, but not to limit them; although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that they can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacement for part or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application, and they should be covered in the scope of the claims and the specification of the present application. Especially, as long as there is no structural conflict, each technical feature mentioned in each embodiment can be combined in any way. The present application is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. A battery device, characterized by, The battery device comprises a battery cell (100) and a thermal management component (300) for adjusting the temperature of the battery cell (100), the thermal management component (300) comprising at least one thermal management unit (310); the thermal management unit (310) comprises: a plurality of first plate bodies (311) arranged at intervals along a first direction (F1); and a second plate body (312) covering the plurality of first plate bodies (311) along a second direction (F2), the second plate body (312) and each of the first plate bodies (311) defining a containing cavity (Q1) for containing a heat exchange medium, all of the containing cavities (Q1) being independent of each other; wherein the second plate body (312) has a bending portion (W), and the bending portion (W) is arranged at an interval between at least two adjacent first plate bodies (311) along the first direction (F1); the first direction (F1) and the second direction (F2) intersect each other.

2. The battery device according to claim 1, characterized by In the case that the bending portion (W) is arranged between two adjacent containing cavities (Q1), at least part of the cavity wall of at least one of the two adjacent containing cavities (Q1) opposite to each other along the first direction (F1) is composed of part of the bending portion (W) between the two adjacent containing cavities (Q1).

3. The battery device of claim 2, wherein, The bending portion (W) comprises a first side wall (W1) and a second side wall (W2) arranged opposite to each other along the first direction (F1), and a connecting portion (W3) connecting the first side wall (W1) and the second side wall (W2); the first side wall (W1) and the second side wall (W2) are both arranged to be bent relative to the connecting portion (W3); In the case that the bending portion (W) is arranged between two adjacent containing cavities (Q1), at least part of one of the cavity walls of at least two adjacent containing cavities (Q1) opposite to each other along the first direction (F1) is composed of at least part of the first side wall (W1), and at least part of the other is composed of at least part of the second side wall (W2).

4. The battery device of claim 3, wherein Along the second direction (F2), the first side wall (W1) and the second side wall (W2) are located on the same side of the connecting portion (W3).

5. The battery device of claim 3, wherein The thermal management unit (310) has a first side (t1) and a second side (t2) arranged opposite to each other along a third direction (F3), and the bending portion (W) extends from the first side (t1) to the second side (t2); The first direction (F1), the second direction (F2) and the third direction (F3) intersect each other in pairs.

6. The battery device according to any one of claims 1 to 5, wherein The thermal management unit (310) further comprises a reinforcing structure (313); The reinforcing structure (313) is arranged on a side of the first plate body (311) away from the second plate body (312) along the second direction (F2).

7. The battery device of claim 6, wherein The reinforcing structure (313) is integrally formed with the first plate body (311); and / or The reinforcing structure (313) is provided with a plurality of recesses (x) independent of each other on the side away from the first plate body (311) along the second direction (F2), and the recesses (x) are recessed towards the first plate body (311) along the second direction (F2).

8. The battery device according to any one of claims 1 to 5, wherein The battery cell (100) comprises a first wall (b1) and a pressure relief mechanism (130) arranged on the first wall (b1); The first wall (b1) and the second plate body (312) are in contact on the side away from the first plate body (311), each pressure relief mechanism (130) corresponds to at least one bending portion (W), and the first wall (b1) and the bending portion (W) corresponding to the pressure relief mechanism (130) on the first wall (b1) define a communication channel (I); the communication channel (I) is in communication with the outside space of both the battery cell (100) and the thermal management unit (310); The normal projection of the pressure relief mechanism (130) on a reference plane (E) and the normal projection of the communication channel (I) on the reference plane (E) have an overlapping part, and the reference plane (E) is a plane perpendicular to the second direction (F2).

9. The battery device of claim 8, wherein, The normal projection of the pressure relief mechanism (130) on the reference plane (E) is located within the range of the normal projection of the communication channel (I) on the reference plane (E).

10. The battery device of claim 8, wherein, The second direction (F2) and the vertical direction are parallel to each other, and the first wall (b1) is located on the bottom side of the battery cell (100).

11. The battery device according to any one of claims 1 to 5, wherein The accommodation cavity (Q1) has an inflow channel (P1) and an outflow channel (P2) in communication with each other; In the same thermal management unit (310), the inflow channel (P1) and the outflow channel (P2) of the same accommodation cavity (Q1) are arranged along the first direction (F1).

12. The battery device of claim 11, wherein, The plurality of first plate bodies (311) comprises a first target plate body (M1) and a second target plate body (M2), and the first target plate body (M1) and the second target plate body (M2) are arranged alternately along the first direction (F1). In the same thermal management unit (310), along the direction from the first first plate body (311) to the last first plate body (311), the inflow channel (P1) and the outflow channel (P2) corresponding to the first target plate body (M1) are arranged in sequence, and the outflow channel (P2) and the inflow channel (P1) corresponding to the second target plate body (M2) are arranged in sequence.

13. The battery device of claim 12, wherein, In the same thermal management unit (310), the first first plate body (311) is the first target plate body (M1), and the last first plate body (311) is the second target plate body (M2).

14. The battery device of claim 11, wherein, The thermal management unit (310) further comprises a spoiler structure (314) arranged in the outflow channel (P2); Compared with the inlet of the outflow channel (P2), the spoiler structure (314) is arranged close to the outlet of the outflow channel (P2).

15. The battery device of claim 14, wherein, The outflow channel (P2) is longitudinally arranged; the outflow channel (P2) is provided with an inlet of the outflow channel (P2) at one end of the longitudinal direction of the outflow channel (P2) and an outlet of the outflow channel (P2) at the other end; in the same accommodating cavity (Q1), the inlet of the outflow channel (P2) is communicated with the outlet of the inflow channel (P1). The outflow channel (P2) has a turbulence area (RZ) arranged near the outlet of the outflow channel (P2), and the turbulence structure (314) is arranged on the turbulence area (RZ); along the longitudinal direction of the outflow channel (P2), the ratio of the size of the turbulence area (RZ) to the size of the outflow channel (P2) is 0.25 to 0.

5.

16. The battery device of claim 15, wherein, In the same accommodating cavity (Q1), the turbulence structure (314) and the corresponding first plate body (311) are an integral structure.

17. The battery device of claim 11, wherein, In the same accommodating cavity (Q1), along the first direction (F1), the size of the inflow channel (P1) is smaller than the size of the outflow channel (P2).

18. The battery device of claim 17, wherein, The thermal management unit (310) further comprises: A plurality of partition walls (315) are arranged one-to-one with all the accommodating cavities (Q1), the partition walls (315) are arranged in the corresponding accommodating cavities (Q1), and the corresponding accommodating cavities (Q1) are divided into the communicated inflow channel (P1) and the outflow channel (P2); A plurality of connecting walls (316) are arranged one-to-one with all the accommodating cavities (Q1), the connecting walls (316) are arranged in the outflow channel (P2) of the corresponding accommodating cavities (Q1), and the outflow channel (P2) is divided into a plurality of sub-flow passages (P21) which are communicated with each other; Among the same accommodating cavity (Q1), along the first direction (F1), the ratio of the size of the inflow channel (P1) to the size of any two of all the sub-flow passages (P21) is 0.9 to 1.

1.

19. The battery device of claim 18, wherein, In the same accommodating cavity (Q1), the partition wall (315), the connecting wall (316) and the corresponding first plate body (311) are an integral structure.

20. The battery device of any one of claims 1-5, wherein, A plurality of thermal management units (310) are arranged, and all the thermal management units (310) are arranged at intervals along the first direction (F1).

21. The battery device of any one of claims 1-5, wherein, The battery device further comprises: A box body (200) comprising a box body (D) and a support beam (230) arranged in the box body (D), the support beam (230) and the box body (D) jointly defining an accommodating space (Q2) for accommodating the battery monomer (100) and the thermal management component (300), the support beam (230) has a first cavity (K1) and a second cavity (K2) which are independent of each other; and A liquid inlet connector (400) and a liquid outlet connector (500) are arranged in the support beam (230); the inside of the liquid inlet connector (400) is communicated with the first cavity (K1), and the inside of the liquid outlet connector (500) is communicated with the second cavity (K2); The accommodating cavity (Q1) has an inflow channel (P1) and an outflow channel (P2) that are in communication with each other, an inlet of the inflow channel (P1) is in communication with the first cavity (K1), and an outlet of the outflow channel (P2) is in communication with the second cavity (K2).

22. The battery device of claim 21, wherein, The support beam (230) has a first region (Z1) and a second region (Z2) other than the first region (Z1); The first cavity (K1) and the second cavity (K2) are located in the first region (Z1), and the battery device further comprises a reinforcing portion (600) arranged in the second region (Z2).

23. The battery device of claim 22, wherein, The reinforcing portion (600) has a plurality of recessed structures (610); and / or The reinforcing portion (600) and the support beam (230) are integrally formed; and / or The reinforcing portion (600) is located on a side of the support beam (230) away from the battery monomer (100).

24. The battery device of claim 21, wherein, The support beam (230) is arranged to extend along the first direction (F1), the thermal management unit (310) has a connecting end (L) arranged along a third direction (F3), the connecting end (L) is connected to a side of the support beam (230) along the second direction (F2), and the inlet of the inflow channel (P1) and the outlet of the outflow channel (P2) are arranged at the connecting end (L); The first direction (F1), the second direction (F2), and the third direction (F3) intersect with each other.

25. The battery device of claim 24, wherein, The inflow channel (P1) has an inlet, and the outlet of the inflow channel (P1) is located in the projection range of the first cavity (K1) on the reference plane (E); the reference plane (E) is a plane perpendicular to the second direction (F2); and / or The outflow channel (P2) has an outlet, and the outlet of the outflow channel (P2) is located in the projection range of the second cavity (K2) on the reference plane (E); the reference plane (E) is a plane perpendicular to the second direction (F2).

26. The battery device of claim 24, wherein, The thermal management unit (310) further comprises a flange structure (317); The flange structure (317) is arranged at the connecting end (L) and located on a side of the support beam (230) away from the battery monomer (100).

27. The battery device of claim 26, wherein, The flange structure (317) is connected to a side of the support beam (230) away from the battery monomer (100); and / or The flange structure (317) and the second plate body (312) are integrally formed.

28. The battery device of claim 21, wherein, The box body (200) further comprises a reinforcing beam (240); The reinforcing beam (240) is arranged on a side of the support beam (230) away from the battery monomer (100) and connected to the box body (D).

29. The battery device of claim 28, wherein, The liquid inlet connector (400) is arranged on a side of the support beam (230) away from the battery monomer (100), and a side of the liquid inlet connector (400) is provided with the reinforcing beam (240); and / or The liquid outlet connector (500) is arranged on the side of the support beam (230) away from the battery monomer (100), and one side of the liquid outlet connector (500) is provided with the reinforcing beam (240); and / or The reinforcing beam (240) and the support beam (230) are integrally formed; and / or The material of the reinforcing beam (240) comprises plastic.

30. The battery device of claim 21, wherein, The liquid inlet connector (400) and the support beam (230) are integrally formed; and / or The liquid outlet connector (500) and the support beam (230) are integrally formed; and / or The material of the liquid inlet connector (400) comprises plastic; and / or The material of the liquid outlet connector (500) comprises plastic; and / or The material of the support beam (230) comprises plastic.

31. The battery device of any one of claims 1-5, wherein, The first plate body (311) and the second plate body (312) are welded or glued; and / or The material of the first plate body (311) comprises plastic; and / or The material of the second plate body (312) comprises metal.

32. An electrical device, comprising: The battery device comprises the battery device according to any one of claims 1-31.

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