Battery device, energy storage device and power utilization device

Abstract

The utility model discloses a battery device, an energy storage device and a power utilization device. The battery device comprises a box body, single batteries and a heat exchange piece, the heat exchange piece is provided with a heat exchange flow channel and a flow dividing flow channel, the heat exchange flow channel is provided with a flow dividing port and a flow converging port, and the flow dividing port is located on the upstream side of the flow converging port in the flowing direction of a heat exchange medium; the shunting flow channel is communicated with the shunting port and the converging port, the shunting flow channel comprises a bending section and a straight section which are connected, the bending section is connected to the shunting port, and the straight section is connected to the converging port; the multiple flow dividing flow channels are arranged on one side, in the first direction, of the heat exchange flow channel, and / or the multiple flow dividing flow channels are arranged on the other side, in the first direction, of the heat exchange flow channel, and the first direction is perpendicular to the flowing direction of the heat exchange medium. According to the battery device, the heat exchange capacity of the heat exchange piece can be improved, the single batteries are in a proper working temperature environment, and the reliability of the battery device is improved.

Description

TECHNICAL FIELD

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

[0002] New energy batteries are increasingly widely used in life and industry. For example, new energy vehicles equipped with batteries have been widely used. In addition, batteries are also increasingly used in the field of energy storage and the like.

[0003] In new energy vehicles equipped with batteries, a battery device can be used to provide power in whole or in part. In the field of energy storage, a battery device can be installed in an energy storage box or directly installed at a user side. In the use process of the battery device, the battery monomers in the battery device generate heat. In the application scenario, the battery device has the adverse situation of poor heat exchange capacity. Therefore, how to improve the heat exchange capacity of the battery device is one of the research and development topics in the industry. UTILITY MODEL CONTENT

[0004] To solve the above technical problems, the present application provides a battery device, an energy storage device and an electric device.

[0005] The present application is implemented through the following technical solutions.

[0006] A first aspect of the embodiment of the present application discloses a battery device, comprising a box body, the box body having a containing space, a battery monomer arranged in the containing space, a heat exchange member for heat exchange with the battery monomer, the heat exchange member being provided with a heat exchange flow channel, the heat exchange flow channel being used for the flow of a heat exchange medium, the heat exchange flow channel having a shunt port and a confluence port, along the flow direction of the heat exchange medium, the shunt port being located on the upstream side of the confluence port, a shunt flow channel, the shunt flow channel being in communication with the shunt port and the confluence port of the heat exchange flow channel, the shunt flow channel comprising a bending segment and a straight segment connected in series, the bending segment being connected to the shunt port, and the straight segment being connected to the confluence port, a plurality of shunt flow channels are arranged on one side of the heat exchange flow channel along a first direction, and / or a plurality of shunt flow channels are arranged on the other side of the heat exchange flow channel along the first direction, the first direction being perpendicular to the flow direction of the heat exchange medium.

[0007] Since the heat exchange flow channel is connected with multiple branch flow channels, the contact area of the heat exchange medium and the battery cell can be further increased based on the heat exchange flow channel by arranging the branch flow channel, the heat exchange capacity of the heat exchange element is improved, which is beneficial to make the battery cell in a suitable working temperature environment and improve the reliability of the battery device. In addition, since the heat exchange flow channel has the confluence port and the branch flow channel is connected with the confluence port, the heat exchange medium entering the branch flow channel can flow into the heat exchange flow channel through the confluence port, and the flow rate of the local position of the confluence port is improved. The branch flow channel arranged at multiple positions of the heat exchange flow channel can reduce the resistance loss of the heat exchange medium along the way to a certain extent, reduce the medium inlet pressure of the heat exchange flow channel, and further reduce the risk of liquid explosion of the medium inlet.

[0008] In some embodiments, the bending section is an arc structure, and a curvature center of the bending section is located at a side of the bending section close to the straight section, and the straight section is at an acute angle with the connected heat exchange flow channel.

[0009] Therefore, the branch flow channel structure can further improve the flow rate of the heat exchange medium in the heat exchange flow channel and improve the heat exchange capacity.

[0010] In some embodiments, the farther away from the medium inlet of the heat exchange flow channel, the smaller the interval between adjacent branch flow channels is along the flow direction of the heat exchange medium.

[0011] Since the farther away from the medium inlet of the heat exchange flow channel, the smaller the interval between adjacent branch flow channels is, the resistance loss of the heat exchange flow channel is reduced, the flow speed of the heat exchange medium in the heat exchange flow channel is increased, and the heat exchange capacity is improved, and the temperature consistency of the battery cell and the reliability of the battery device are further improved.

[0012] In some embodiments, multiple branch flow channels are arranged on the same side of the heat exchange flow channel along the first direction.

[0013] Since multiple branch flow channels can be arranged on the same side of the heat exchange flow channel, the heat exchange element is adapted to the placement direction and position of the battery cell, and the layout flexibility is improved.

[0014] In some embodiments, the branch flow channel includes a first branch flow channel and a second branch flow channel arranged on both sides of the heat exchange flow channel along the first direction, the first branch flow channel is connected with the first branch port and the first confluence port of the heat exchange flow channel, and the second branch flow channel is connected with the second branch port and the second confluence port of the heat exchange flow channel; the first branch port and the second branch port are located at the same position, and the first confluence port and the second confluence port are located at the same position along the flow direction of the heat exchange medium.

[0015] Therefore, the heat exchange element is adapted to the placement direction and position of the battery monomer, and the layout flexibility is improved. For example, the arrangement of the shunt flow channel can be flexibly selected according to the flow requirement, the size of the space around the flow channel, the shape of the heat exchange flow channel, and the like.

[0016] In some embodiments, the shunt flow channel includes a first shunt flow channel and a second shunt flow channel arranged on both sides of the heat exchange flow channel along the first direction. The first shunt flow channel is connected with the first shunt port and the first confluence port of the heat exchange flow channel, and the second shunt flow channel is connected with the second shunt port and the second confluence port of the heat exchange flow channel. Along the flow direction of the heat exchange medium, the first confluence port is located on the upstream side of the second shunt port, and the first confluence port is located between the second shunt port and the second confluence port.

[0017] Therefore, the heat exchange element is adapted to the placement direction and position of the battery monomer, and the layout flexibility is improved. For example, the arrangement of the shunt flow channel can be flexibly selected according to the flow requirement, the size of the space around the flow channel, the shape of the heat exchange flow channel, and the like.

[0018] In some embodiments, the shunt flow channel includes a first shunt flow channel and a second shunt flow channel arranged on both sides of the heat exchange flow channel along the first direction. The first shunt flow channel is connected with the first shunt port and the first confluence port of the heat exchange flow channel, and the second shunt flow channel is connected with the second shunt port and the second confluence port of the heat exchange flow channel. Along the flow direction of the heat exchange medium, the first confluence port is located on the upstream side of the second shunt port.

[0019] Therefore, the heat exchange element is adapted to the placement direction and position of the battery monomer, and the layout flexibility is improved. For example, the arrangement of the shunt flow channel can be flexibly selected according to the flow requirement, the size of the space around the flow channel, the shape of the heat exchange flow channel, and the like.

[0020] In some embodiments, the included angle between the straight section and the first direction is not greater than 30° and not less than 10°.

[0021] Therefore, the included angle between the straight section and the first direction is in a suitable range, which can reduce the impact of the heat exchange medium flowing from the shunt flow channel into the heat exchange flow channel, reduce the local loss of the heat exchange medium when the fluid flow direction changes, and balance the acceleration effect of the heat exchange medium and the coverage range of the shunt flow channel, thereby further improving the heat exchange capacity of the heat exchange element.

[0022] In some embodiments, the ratio of the inner diameter of the shunt flow channel to the inner diameter of the heat exchange flow channel is not less than 1 and not greater than 2.

[0023] Therefore, the ratio of the inner diameter of the flow distribution channel to the inner diameter of the heat exchange channel is in a proper range, the flow of the flow distribution channel and the local resistance loss can be considered, and the heat exchange capacity of the heat exchange member is further improved.

[0024] In some embodiments, the heat exchange member is a water-cooled plate, the heat exchange channels include edge pipe sections, the flow distribution channels arranged on the edge pipe sections are arranged on a side away from the edge of the water-cooled plate along the first direction; and the edge pipe section is the heat exchange channel closest to the edge of the water-cooled plate.

[0025] Therefore, the flow distribution channels can be reasonably arranged according to the space limitation of the edge pipe section, the strength of the water-cooled plate is considered, and the space utilization of the water-cooled plate is further improved.

[0026] In some embodiments, the length of the water-cooled plate is more than 1500 mm, and / or the width of the water-cooled plate is more than 500 mm, and / or the length of the heat exchange channel is greater than 3000 mm.

[0027] Therefore, the heat exchange capacity of the large battery device and the long channel water-cooled plate can be improved, the flow resistance, heat dissipation and temperature uniformity of the heat exchange channel are met, the temperature uniformity of the water-cooled plate in the battery pack is further improved, and the consistency of the battery cell temperature is further improved.

[0028] The second aspect of the embodiments of the present application discloses an energy storage device, which includes a plurality of the battery device of the first aspect of the embodiments of the present application, and the battery device is used for storing or providing electric energy.

[0029] Since the energy storage device includes the battery device provided by the first aspect of the embodiments of the present application, the heat exchange capacity of the energy storage device can be improved to a certain extent, which is beneficial to the battery cell in a suitable working temperature environment.

[0030] The third aspect of the embodiments of the present application provides a power consumption device, which includes the battery device of the first aspect of the embodiments of the present application or the energy storage device of the second aspect of the embodiments of the present application, and the battery device is used for storing or providing electric energy.

[0031] Since the power consumption device includes the battery device provided by the first aspect of the embodiments of the present application or the energy storage device provided by the second aspect of the embodiments of the present application, the heat exchange capacity of the power consumption device can be improved to a certain extent, which is beneficial to the battery cell in a suitable working temperature environment.

[0032] The beneficial effects of the embodiments of the present application include: through the present application, the heat exchange capacity of the heat exchange member can be improved, the battery cell is in a suitable working temperature environment, and the reliability of the battery device is improved. BRIEF DESCRIPTION OF DRAWINGS

[0033] Various other advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiments with reference made to the accompanying drawings. The drawings are for purposes of illustration only and are not intended to limit the scope of the present application. Like reference numerals designate corresponding parts throughout the several views, and are not intended to limit the scope of the present application. In the drawings:

[0034] Figure 1 A structural schematic view of a vehicle provided for some embodiments of the present application;

[0035] Figure 2 A perspective exploded schematic view of a battery provided for some embodiments of the present application;

[0036] Figure 3 A structural schematic view of a heat exchange member provided for some embodiments of the present application;

[0037] Figure 4 A structural schematic view of a battery provided for some embodiments of the present application; Figure 3 A structural schematic view of a battery provided for some embodiments of the present application;

[0038] Figure 5 A structural schematic view of a battery provided for some embodiments of the present application; Figure 4 A structural schematic view of a battery provided for some embodiments of the present application;

[0039] Figure 6 A structural schematic view of a shunt flow channel provided for some embodiments of the present application;

[0040] Figure 7 A structural schematic view of a shunt flow channel provided for some embodiments of the present application;

[0041] Figure 8 A structural schematic view of a shunt flow channel provided for some embodiments of the present application;

[0042] Figure 9 A structural schematic view of an energy storage device provided for some embodiments of the present application.

[0043] BRIEF DESCRIPTION OF DRAWINGS

[0044] 100 - battery device, 101 - box body, 102 - cover plate, 103 - bottom plate, 10 - battery cell, 20 - heat exchange member, 21 - heat exchange flow channel, 22 - shunt port, 22A - first shunt port, 22B - second shunt port, 23 - shunt port, 23A - first shunt port, 23B - second shunt port, 24 - water cooling plate, 25 - edge tube segment, 30 - shunt flow channel, 30A - bent segment, 30B - straight segment, 31 - first shunt flow channel, 32 - second shunt flow channel, 200 - controller, 300 - motor, 1000 - vehicle, 2000 - energy storage device. DETAILED DESCRIPTION

[0045] The embodiments of the present application will be described in detail below with reference to the drawings. The following examples are only used to more clearly illustrate the technical scheme of the present application, and therefore only serve as examples, but cannot be used to limit the protection scope of the present application.

[0046] 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 the present application; the present specification and claims and the aforementioned description of the drawings herein, the terms "comprising", "comprises" and "having" and any variations thereof, are intended to cover a non-exclusive inclusion.

[0047] In the description of the embodiments of the present application, the technical terms "first", "second", "third" and the like 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 technical features indicated. 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.

[0048] In this paper, the phrase "embodiment" means that the specific features, structures or properties described in conjunction with the embodiment can be included in at least one embodiment of the present application. The appearance of this phrase in various places in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment to other embodiments. The skilled person in the art explicitly and implicitly understands that the embodiments described herein can be combined with other embodiments.

[0049] In the description of the embodiments of the present application, the term "and / or" is only a description of the association relationship between the associated objects, which means that there can be three relationships, for example, A and / or B, which means that there are three cases of A alone, A and B together, and B alone. In addition, the character " / " in this paper generally represents the "or" relationship between the front and rear associated objects.

[0050] In the description of the embodiments of the present application, the technical terms "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "circumferential" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, which is only for the convenience of describing the embodiments of the present application and simplifying the description, and is not intended to indicate or imply that the indicated device or element must have a particular orientation, be constructed in a particular orientation, be operated or used, and therefore cannot be understood as limiting the embodiments of the present application.

[0051] In the description of the embodiments of the present application, unless explicitly defined and limited otherwise, the technical terms "mounting", "connecting", "connecting", "fixing" and the like should be understood in a broad sense, for example, can be fixedly connected, or can be detachably connected, or can be integrated; can be mechanically connected, or can be electrically connected; can be directly connected, or can be indirectly connected through an intermediate medium, or can be the internal communication of two elements or the interaction relationship between two elements. For those skilled in the art, the specific meanings of the above terms in the embodiments of the present application can be understood according to the specific circumstances.

[0052] In the description of the embodiments of the present application, unless explicitly defined and limited otherwise, the technical term "contacting" should be understood in a broad sense, which can be direct contact or contact through an intermediate medium layer, and can be contact between two contacting objects without interaction force, or can be contact between two contacting objects with interaction force.

[0053] The present application will be described in detail below.

[0054] At present, new energy batteries are more and more widely used in life and industry. New energy batteries are not only applied to energy storage power supply systems such as hydroelectric, thermal, wind and solar power stations, but also widely used in electric bicycles, electric motorcycles, electric vehicles and other electric vehicles, and aerospace and other fields. With the continuous expansion of the application field of power batteries, the market demand is also increasing.

[0055] During use, the battery cells in the battery device generate heat. In application scenarios, the battery device has the problem of poor heat exchange capacity, so how to improve the heat exchange capacity of the battery device is one of the research and development topics in the industry.

[0056] After research and design, the heat exchange element of the battery cell has a heat exchange flow channel. By providing a shunt flow channel in communication with the heat exchange flow channel, the coverage area of the flow channel on the heat exchange element can be increased, the flow speed of the heat exchange medium can be increased, and the heat exchange capacity of the battery device can be further improved, which is beneficial to keep the battery cell at a suitable working temperature.

[0057] Based on this design concept, this application provides a battery device, including a housing with a receiving space, a battery cell disposed within the receiving space, a heat exchanger for exchanging heat with the battery cell, the heat exchanger having a heat exchange channel for the flow of heat exchange medium, the heat exchange channel having a branch port and a confluence port, the branch port being located upstream of the confluence port along the flow direction of the heat exchange medium; a branch channel, the branch port of the branch channel and the heat exchange channel being connected to the confluence port, the branch channel including a connected bent section and a straight section, the bent section being connected to the branch port, and the straight section being connected to the confluence port; the bent section having an arc-shaped structure, the center of curvature of the bent section being located on the side of the bent section closer to the straight section, and the straight section forming an acute angle with the heat exchange channel to which it is connected.

[0058] Because the heat exchange channel connects to multiple branch channels, the contact area between the heat exchange medium and the battery cells can be further increased by setting up branch channels on top of the heat exchange channel. This enhances the heat exchange capacity of the heat exchange components, helps to keep the battery cells in a suitable operating temperature environment, and improves the reliability of the battery device. Furthermore, since the heat exchange channel has a confluence port, and the branch channels connect to the confluence port, the heat exchange medium entering the branch channels can flow back into the heat exchange channel through the confluence port, increasing the flow velocity at the local location of the confluence port. Setting up branch channels at multiple points in the heat exchange channel can, to some extent, reduce the friction loss of the heat exchange medium, reduce the medium inlet pressure of the heat exchange channel, and further reduce the risk of liquid bursting at the medium inlet.

[0059] In the following embodiments, for ease of explanation, a vehicle 1000 is used as an example of an electrical device according to an embodiment of this application. The description is as follows with reference to the accompanying drawings.

[0060] Figure 1 The diagram illustrates the structure of a vehicle 1000 as provided in some embodiments of this application. The vehicle 1000 can be a gasoline-powered vehicle, a natural gas-powered vehicle, or a new energy vehicle. New energy vehicles can be pure electric vehicles, hybrid electric vehicles, or range-extended electric vehicles, etc. Figure 1 As shown, a battery device 100 is installed inside the vehicle 1000. The battery device 100 can be located at the bottom, front, or rear of the vehicle 1000. The battery device 100 can be used to power the vehicle 1000; for example, the battery device 100 can serve as the operating power source for the vehicle 1000. The vehicle 1000 may also include a controller 200 and a motor 300. The controller 200 is used to control the battery device 100 to supply power to the motor 300, for example, to meet the power needs of the vehicle 1000 during starting, navigation, and driving.

[0061] In some embodiments of the present application, the battery device 100 can not only serve as the operating power source of the vehicle 1000, but also serve as the driving power source of the vehicle 1000, replacing or partially replacing the fuel or natural gas to provide driving power for the vehicle 1000.

[0062] Figure 2 A perspective exploded schematic view of the battery device 100 is provided in some embodiments of the present application. As shown in FIGS. 1A and 1B, the battery device 100 includes a bottom plate 103, a cover plate 102, and at least one battery cell 10. The cover plate 102 is arranged above the bottom plate 103, thereby forming a space for accommodating the battery cell 10. Figure 2 Figure 3 As shown in FIGS. 1A and 1B, the battery device 100 includes a bottom plate 103, a cover plate 102, and at least one battery cell 10. The cover plate 102 is arranged above the bottom plate 103, thereby forming a space for accommodating the battery cell 10.

[0063] In some embodiments of the present application, the battery cell can be a secondary battery, which refers to a battery cell that can be activated by charging after discharging.

[0064] The battery cell can be a lithium ion battery, a sodium ion battery, a sodium lithium ion battery, a lithium metal battery, a sodium metal battery, a lithium sulfur battery, a magnesium ion battery, a nickel hydrogen battery, a nickel cadmium battery, a lead-acid battery, etc. The present application is not limited thereto.

[0065] Although not shown, the battery cell generally includes an electrode assembly. The electrode assembly includes a positive electrode, a negative electrode, and a separator. During the charging and discharging process of the battery cell, active ions (such as lithium ions) are inserted and extracted between the positive electrode and the negative electrode. The separator is arranged between the positive electrode and the negative electrode, which can prevent the positive and negative electrodes from short-circuiting, and at the same time allow the active ions to pass through.

[0066] In some embodiments, the electrode assembly is provided with a tab, which can guide the current out of the electrode assembly. The tab includes a positive tab and a negative tab.

[0067] In some embodiments, the electrode assembly can be in a wound structure, a stacked structure, or a hybrid structure of winding and stacking.

[0068] In some embodiments, the battery cell can include a housing. The housing is used to encapsulate the electrode assembly and other components such as electrolyte. The housing can be a steel shell, an aluminum shell, a plastic shell (such as polypropylene), a composite metal shell (such as a copper-aluminum composite shell), or an aluminum-plastic film, etc.

[0069] As an example, the battery cell can be a cylindrical battery cell, a prismatic battery cell, a soft-pack battery cell, or other shapes of battery cells. The prismatic battery cell includes a square battery cell, a blade-shaped battery cell, a multi-prismatic battery cell, such as a hexagonal prismatic battery cell, etc. The present application is not particularly limited.

[0070] ​In some embodiments, the housing includes a shell and an end cap, the shell is provided with an opening, and the end cap closes the opening to form a sealed space for containing the electrode assembly and electrolyte and the like. The shell can be provided with one or more openings. The end cap can also be provided with one or more openings.

[0071] In some embodiments, the housing can be a sealed structure or a non-sealed structure. As an example, when the housing is a non-sealed structure, the housing serves to protect the electrode assembly, and a sealing bag is further included between the housing and the electrode assembly, which is used to package the electrode assembly and electrolyte. Specifically, the sealing bag can be a bag-shaped insulating member or an aluminum plastic film. When the housing is a sealed structure, it is used to package the electrode assembly and electrolyte and the like.

[0072] In some embodiments, at least one electrode terminal is provided on the housing, and the electrode terminal is electrically connected with the tab. The electrode terminal can be directly connected with the tab or indirectly connected with the tab through a current collecting member. The electrode terminal can be provided on the end cap or on the shell.

[0073] The emissions from the battery cell mentioned in the present application include, but are not limited to, electrolyte, dissolved or split positive and negative electrode sheets, fragments of separator film, high-temperature and high-pressure gas generated by reaction, flame, and the like.

[0074] The battery apparatus mentioned in the embodiments of the present application can include one or more battery cell assemblies for providing voltage and capacity. The battery cell assembly can include a plurality of battery cells connected in series, in parallel, or in a mixed connection through a current collecting member.

[0075] In some embodiments, the battery cell assembly is usually formed by arranging a plurality of battery cells; as an example, the battery cell assembly can be a battery module, which is formed by arranging and fixing a plurality of battery cells into an independent module. As an example, the battery module can be formed by bundling a plurality of battery cells with a cable tie.

[0076] In some embodiments, the battery apparatus can be a battery pack, which includes a box body and one or more battery cell assemblies contained in the box body.

[0077] As an example, the battery cell assembly can be a battery module, which can be contained in the box body by fixing the battery module in the box body.

[0078] As an example, the battery cell assembly can also be contained in the box body by directly fixing a plurality of battery cells in the box body.

[0079] As an example, the box can include a first box and a second box. The first box and the second box are buckled so that the inside of the box forms a closed space to accommodate the battery monomer assembly. The closed here means covered or closed, which can be sealed or unsealed. The first box can be a top cover or a bottom plate.

[0080] As an example, the box can include a top cover, a frame and a bottom plate. The top cover and the bottom plate are connected with the frame respectively, so that the inside of the box forms a closed space to accommodate the battery monomer assembly.

[0081] As an example, the box can be part of the chassis structure of the vehicle. For example, the top cover of the box can be at least part of the floor of the vehicle, or the frame of the box can be at least part of the cross beam and the longitudinal beam of the vehicle.

[0082] In some embodiments, the battery device refers to an energy storage device, and the energy storage device includes a box, at least one side of which is provided with a door. The energy storage device includes an energy storage container, an energy storage cabinet and the like.

[0083] The technical solutions described in the embodiments of the present application are applicable to various electric devices using battery monomers and battery devices, such as mobile phones, portable devices, notebook computers, electric vehicles, electric toys, electric tools, vehicles, ships and spacecraft, such as spacecraft including airplanes, rockets, space shuttles and spaceships.

[0084] In the following, with reference to Figures 3 to 9 Some embodiments of the present application are described in detail.

[0085] Figure 3 The structural schematic diagram of the heat exchange member provided in some embodiments of the present application is shown in the following figure: Figure 4 The structural schematic diagram of the heat exchange member provided in some embodiments of the present application is shown in the following figure: Figure 3 The structural schematic diagram of the heat exchange member provided in some embodiments of the present application is shown in the following figure: Figure 5 The structural schematic diagram of the heat exchange member provided in some embodiments of the present application is shown in the following figure: Figure 4 The structural schematic diagram of the heat exchange member provided in some embodiments of the present application is shown in the following figure: Figure 6 The structural schematic diagram of the shunt flow channel provided in some embodiments of the present application is shown in the following figure: Figure 7 The structural schematic diagram of the shunt flow channel provided in some embodiments of the present application is shown in the following figure: Figure 8 The structural schematic diagram of the shunt flow channel provided in some embodiments of the present application is shown in the following figure: Figure 9 The structural schematic diagram of the energy storage device provided in some embodiments of the present application is shown in the following figure:

[0086] In some embodiments of the present application, the first direction (Y) and the flow direction (X) of the heat exchange medium are set for convenience of description, and the first direction (Y) and the flow direction (X) of the heat exchange medium are directions intersecting with each other, which includes perpendicular intersection with each other. In addition, for convenience of description, as Figures 3 to 8As shown, the X direction (i.e. the flow direction of the heat exchange medium (X)) and the Y direction (i.e. the first direction (Y)) are set in the figure, and the two directions are perpendicular to each other.

[0087] A first aspect of the embodiments of the present application discloses a battery device 100, comprising a box body 101 having an accommodation space, a battery cell 10 arranged in the accommodation space, and a heat exchange member 20 for heat exchange with the battery cell 10. The heat exchange member 20 is provided with a heat exchange flow channel 21 for the flow of a heat exchange medium. The heat exchange flow channel 21 has a branch port 22 and a convergence port 23. Along the flow direction of the heat exchange medium (X), the branch port 22 is located on the upstream side of the convergence port 23. A branch flow channel 30 is in communication with the branch port 22 and the convergence port 23 of the heat exchange flow channel 21. The branch flow channel 30 comprises a bending section 30A and a straight section 30B connected in series. The bending section 30A is connected to the branch port 22, and the straight section 30B is connected to the convergence port 23. A plurality of branch flow channels 30 are arranged on one side of the heat exchange flow channel 21 along a first direction (Y), and / or a plurality of branch flow channels 30 are arranged on the other side of the heat exchange flow channel 21 along the first direction (Y). The first direction (Y) is perpendicular to the flow direction of the heat exchange medium (X).

[0088] In the embodiments of the present application, the material of the box body 101 can be an alloy material such as aluminum alloy, iron alloy, etc., a high polymer material such as polycarbonate, polyisocyanurate foam plastic, etc., or a composite material such as glass fiber and epoxy resin, etc.

[0089] The box body 101 can adopt various structures. Alternatively, the box body 101 can be a hollow structure with one side open. A cover plate 102 is covered on the open side to form the box body 101 with a placing space. Alternatively, the box body 101 can also be configured as a closed box body 101.

[0090] Alternatively, the box body 101 can comprise a first box body 101 and a second box body 101.

[0091] In specific embodiments, as shown in Figure 2 The first box body 101 can be the cover plate 102, and the second box body 101 can be the bottom plate 103. The cover plate 102 is covered above the bottom plate 103, and at least one battery cell 10 is arranged between the cover plate 102 and the bottom plate 103.

[0092] In the embodiments of the present application, the heat exchange member 20 can be arranged between the battery cell 10 and the cover plate 102, or the heat exchange member 20 can be arranged between the battery cell 10 and the bottom plate 103.

[0093] Exemplarily, as shown in Figure 2As shown, the heat exchange member 20 is arranged between the battery cell 10 and the bottom plate 103. It can be understood that the bottom plate 103 can be formed with a groove by stamping or the like, and the heat exchange member 20 is embedded in the groove, that is, the heat exchange member 20 and the bottom plate 103 jointly serve as the bottom structure of the battery device 100, further improving the strength of the bottom plate 103 and bearing the battery cell 10.

[0094] It can be understood that the heat exchange member 20 can exchange heat with the battery cell 10 to heat or cool the battery cell 10.

[0095] For example, the battery cell 10 can be heated by the heat exchange member 20 when it works in cold conditions, and the battery cell 10 can be cooled by the heat exchange member 20 during work to prevent the battery cell 10 from further temperature rise, which is beneficial to ensure the reliability of the battery cell 10.

[0096] In the embodiment of the present application, the heat exchange member 20 is provided with a heat exchange flow channel 21 for the heat exchange medium to flow through. It can be understood that the heat exchange flow channel 21 has a medium inlet and a medium outlet, which can be connected with external pipelines to facilitate the heat exchange medium to enter and exit the heat exchange pipeline.

[0097] Optionally, the heat exchange medium can be a variety of low-viscosity fluids, such as water, ethylene glycol, propylene glycol, air, etc. The present application does not limit this.

[0098] Optionally, when the heat exchange member 20 is provided with a plurality of heat exchange flow channels 21, the arrangement of the plurality of heat exchange flow channels 21 is not limited by the present application.

[0099] For example, the heat exchange member 20 can be defined as a plurality of regions, and at least one heat exchange flow channel 21 is arranged in each region. The plurality of heat exchange flow channels 21 can share the same medium inlet and medium outlet, or each heat exchange flow channel 21 can be separately provided with a medium outlet.

[0100] Optionally, the plurality of heat exchange flow channels 21 can be arranged in sequence along the first direction (Y). Of course, the plurality of heat exchange flow channels 21 can also be arranged around each other.

[0101] In the embodiment of the present application, the shape of the heat exchange flow channel 21 is not limited. Optionally, the heat exchange flow channel 21 can have a portion extending along a straight line, or can have an arc-shaped portion extending along a curved direction.

[0102] For example, the heat exchange flow channel 21 can directly bear the heat exchange medium, and the heat exchange flow channel 21 can be configured as a groove to directly contact the heat exchange medium.

[0103] Exemplarily, the heat exchange flow channel 21 can indirectly carry the heat exchange medium. For example, the heat exchange flow channel 21 can be configured as a groove, and a heat exchange pipe for flowing the heat exchange medium is arranged in the groove. It can be understood that the heat exchange pipe is in the shape of a bent pipe and is hollow inside. The heat exchange pipe can be a round pipe, a flat pipe, a harmonica pipe or the like, which is not limited in the present application.

[0104] It can be understood that when the heat exchange pipe is a flat pipe, the heat exchange flow channel 21 can be a square groove matched with the shape of the flat pipe, so that the heat exchange pipe can better fit the wall surface of the heat exchange flow channel 21; when the heat exchange pipe is a hollow round pipe, the heat exchange flow channel 21 can be a circular groove matched with the shape of the round pipe, so that the heat exchange pipe can better fit the wall surface of the heat exchange flow channel 21.

[0105] In the embodiment of the present application, the heat exchange flow channel 21 has a branch port 22 and a converging port 23, and the branch port 22 is located on the upstream side of the converging port 23 along the flow direction (X) of the heat exchange medium. A branch flow channel 30 is in communication with the branch port 22 and the converging port 23 of the heat exchange flow channel 21.

[0106] It can be understood that the heat exchange medium can only flow in the heat exchange flow channel 21, which is easy to cause the part of the heat exchange member 20 in contact with the battery monomer 10 to not pass through the heat exchange medium, so that the heat exchange member 20 only has a good heat exchange effect on part of the battery monomer 10 when heat exchange is performed.

[0107] The heat exchange member 20 is provided with a branch flow channel 30 connected with the heat exchange flow channel 21, so that the heat exchange medium is branched when flowing through the branch port 22, and then flows through the branch flow channel 30 and converges into the heat exchange flow channel 21 at the converging port 23.

[0108] Thus, the heat exchange medium in the heat exchange flow channel 21 is branched, so that the heat exchange medium can flow through more areas of the heat exchange member 20, so that the heat exchange member 20 has a larger heat exchange area when heat exchanging with the battery monomer 10, thereby making the heat exchange member 20 have a better heat exchange effect, improving the heat exchange capacity of the heat exchange member 20, and being beneficial to making the battery monomer 10 in a suitable working temperature environment and improving the reliability of the battery device 100.

[0109] In the embodiment of the present application, the branch flow channel 30 includes a bending section 30A and a straight section 30B connected with each other, the bending section 30A is connected with the branch port 22, and the straight section 30B is connected with the converging port 23; the bending section 30A is in the shape of an arc, the center of curvature of the bending section 30A is located on the side of the bending section 30A close to the straight section 30B, and the straight section 30B is at an acute angle with the heat exchange flow channel 21 connected therewith.

[0110] Optionally, the bending section 30A can be in the shape of a circular arc, and the center of curvature of the bending section 30A is the center of the circular arc.

[0111] Optionally, the inner diameters of the straight section 30B and the bent section 30A in the diversion channel 30 can be the same or different.

[0112] In the embodiments of this application, the bent section 30A has an arc-shaped structure, and the curvature center of the bent section 30A is located on the side of the bent section 30A close to the straight section 30B. The straight section 30B forms an acute angle with the heat exchange channel 21 to which it is connected.

[0113] In a specific embodiment, the shape of the flow divider 30 can be a structural unit of a Tesla valve, which accelerates the fluid to a certain extent when the fluid flows in the forward direction. For example... Figure 4 As shown, the flow direction (X) of the heat exchange medium flowing through the diversion channel 30 is the forward flow direction of the Tesla valve. Specifically, it flows from the diversion port 22 through the bend section 30A and the straight section 30B, and then flows into the heat exchange channel 21 through the confluence port 23. When the heat exchange medium flows forward in the Tesla valve, the local resistance is relatively small. In this embodiment, since the heat exchange channel 21 is connected to the structural unit of the Tesla valve, the flow velocity of the heat exchange medium is increased. Therefore, in this embodiment, the diversion channel structure can further increase the flow velocity of the heat exchange medium and improve the heat exchange capacity.

[0114] Setting up multiple branch channels 30 in the heat exchange channel 21 can reduce the friction loss of the heat exchange medium to a certain extent, reduce the medium inlet pressure of the heat exchange channel 21, and further reduce the risk of liquid bursting at the medium inlet.

[0115] Optionally, multiple branch channels 30 are disposed on the same side of the heat exchange channel 21 along the first direction (Y). The shapes and sizes of the multiple branch channels 30 can be the same or different. In this embodiment, the upstream and downstream positions of the multiple branch channels 30 located on the same side along the first direction (Y) are not limited.

[0116] Alternatively, multiple branch channels 30 are disposed on both sides of the heat exchange channel 21 along the first direction (Y). The shapes and sizes of the multiple branch channels 30 can be the same or different. In this embodiment, the upstream and downstream positions of the multiple branch channels 30 located on both sides along the first direction (Y) are not limited.

[0117] In the embodiments of this application, along the flow direction (X) of the heat exchange medium, the further away from the medium inlet of the heat exchange channel 21, the smaller the interval between adjacent branch channels 30.

[0118] It is understandable that the heat exchange medium experiences greater pressure and faster flow rate near the medium inlet than far from the medium inlet, meaning that the heat exchange effect is better near the medium inlet, which to some extent leads to an imbalance in heat exchange among the different areas of the heat exchanger 20.

[0119] In the embodiments of the present application, the area far away from the medium inlet is provided with more shunt flow channels 30, which can accelerate the flow of the heat exchange medium in this area to a certain extent, and is beneficial to reduce the resistance loss along the heat exchange flow channel 21, increase the flow speed of the heat exchange medium when returning, and improve the heat exchange capacity, further improve the temperature consistency of the battery monomer 10 and the reliability of the battery device 100.

[0120] In specific embodiments, along the first direction (Y), the plurality of shunt flow channels 30 are arranged on the same side of the heat exchange flow channel 21.

[0121] Exemplarily, as shown in Figure 7 , the plurality of shunt flow channels 30 are arranged on the same side of the heat exchange flow channel 21.

[0122] Although not shown, the plurality of shunt flow channels 30 can also be arranged on the other side of the heat exchange flow channel 21 in Figure 7 .

[0123] Optionally, all shunt flow channels 30 in the heat exchange member 20 can be arranged on the same side of the heat exchange flow channel 21.

[0124] Alternatively, the heat exchange member 20 can be divided into multiple regions, and all shunt flow channels 30 in each region can be arranged on the same side of the heat exchange flow channel 21.

[0125] Since the plurality of shunt flow channels 30 can be arranged on the same side of the heat exchange flow channel 21, it is beneficial for the heat exchange member 20 to adapt to the placement direction and position of the battery monomer 10, and improve the layout flexibility.

[0126] In the embodiments of the present application, the heat exchange member 20 is a water cooling plate 24, and the heat exchange flow channel 21 includes an edge pipe section 25. The shunt flow channels 30 arranged on the edge pipe section 25 are arranged on the side away from the edge of the water cooling plate 24 along the first direction (Y); and the edge pipe section 25 is the heat exchange flow channel 21 closest to the edge of the water cooling plate 24.

[0127] Exemplarily, the water cooling plate 24 includes two stacked plate bodies, one of which is formed with a groove, and the two plate bodies are fixedly attached after being closed to define the heat exchange flow channel 21, or a heat exchange pipe is arranged in the groove to contain the heat exchange medium.

[0128] Exemplarily, as shown in Figure 3 , the edge pipe section 25 is the heat exchange flow channel 21 closest to the edge of the water cooling plate 24, and the distance between the edge pipe section 25 and the edge of the water cooling plate 24 is short, and the shunt flow channels 30 can be arranged in the shape as shown in Figure 7 . No shunt flow channels 30 are arranged near the edge of the water cooling plate 24, which can reduce the influence of the structure of the shunt flow channels 30 on the strength of the water cooling plate 24.

[0129] Therefore, the shunt flow channel 30 can be reasonably arranged according to the space limitation of the edge pipe section 25, the space utilization of the water-cooled plate 24 is further improved while the strength of the water-cooled plate 24 is considered.

[0130] In the embodiments of the present application, the length of the water-cooled plate 24 is greater than 1500 mm, and / or the width of the water-cooled plate 24 is greater than 500 mm, and / or the length of the heat exchange flow channel 21 is greater than 3000 mm.

[0131] Alternatively, the length of the water-cooled plate 24 can be 1501 mm, 1550 mm, 1600 mm, 1650 mm, 1700 mm, 1750 mm, 1800 mm, 1850 mm, 1900 mm, 1950 mm, 2000 mm, etc. Other lengths are not listed.

[0132] Alternatively, the width of the water-cooled plate 24 can be 501 mm, 550 mm, 600 mm, 650 mm, 700 mm, 750 mm, 800 mm, etc. Other widths are not listed.

[0133] Alternatively, the length of the heat exchange flow channel 21 can be 3100 mm, 3200 mm, 3300 mm, 3400 mm, 3500 mm, 3600 mm, 3700 mm, 3800 mm, 3900 mm, 4000 mm, etc. Other lengths are not listed.

[0134] Therefore, the heat exchange capacity of the large battery device 100 and the long flow channel water-cooled plate 24 can be improved, the flow resistance, heat dissipation and temperature uniformity requirements of the heat exchange flow channel 21 are met, the temperature uniformity of the water-cooled plate 24 in the battery pack is further improved, and the consistency of the battery monomer 10 temperature is further improved.

[0135] In the embodiments of the present application, as shown in Figure 8 The shunt flow channel 30 includes a first shunt flow channel 31 and a second shunt flow channel 32 arranged on both sides of the heat exchange flow channel 21 along the first direction (Y), the first shunt flow channel 31 is connected with the first shunt port 22A and the first flow port 23A of the heat exchange flow channel 21, and the second shunt flow channel 32 is connected with the second shunt port 22B and the second flow port 23B of the heat exchange flow channel 21; along the flow direction (X) of the heat exchange medium, the first shunt port 22A and the second shunt port 22B are located at the same position, and the first flow port 23A and the second flow port 23B are located at the same position.

[0136] It can be understood that the above-mentioned same position refers to the same position of the first shunt port 22A and the second shunt port 22B along the flow direction (X) of the heat exchange medium. Similarly, the second flow port 23B and the second flow port 23B are located at the same position along the flow direction (X) of the heat exchange medium.

[0137] Optionally, the first shunt flow channel 31 can be symmetrical with the second shunt flow channel 32 about a symmetry axis along the flow direction (X) of the heat exchange medium, or can be asymmetrical.

[0138] It can be understood that the first shunt flow channel 31 and the second shunt flow channel 32 are not limited to Figure 8 the positions shown, and in other embodiments not shown, the first shunt flow channel 31 and the second shunt flow channel 32 can be exchanged.

[0139] Thus, it is beneficial for the heat exchange member 20 to adapt to the placement direction and position of the battery monomer 10, and to improve the layout flexibility, for example, the arrangement of the shunt flow channel 30 can be flexibly selected according to the requirements for flow, the size of the space around the flow channel, the shape of the heat exchange flow channel 21, etc.

[0140] In embodiments of the present application, as Figure 6 shown, the shunt flow channel 30 includes a first shunt flow channel 31 and a second shunt flow channel 32 disposed on both sides of the heat exchange flow channel 21 along the first direction (Y), the first shunt flow channel 31 is connected with the first shunt port 22A and the first flow port 23A of the heat exchange flow channel 21, and the second shunt flow channel 32 is connected with the second shunt port 22B and the second flow port 23B of the heat exchange flow channel 21; along the flow direction (X) of the heat exchange medium, the first shunt port 22A is located on the upstream side of the second shunt port 22B, and the first flow port 23A is located between the second shunt port 22B and the second flow port 23B.

[0141] It can be understood that in other embodiments not shown, the first shunt flow channel 31 and the second shunt flow channel 32 can be exchanged.

[0142] Optionally, the size of the first shunt flow channel 31 and the second shunt flow channel 32 along the first direction can be the same or different, which is not limited in the present application.

[0143] Optionally, in other embodiments not shown, the first shunt flow channel 31 can be located Figure 6 on the opposite side of the first direction (Y) in Figure 6 , and the second shunt flow channel 32 can also be located on the opposite side of the first direction (Y) in

[0144] .

[0145] Thus, it is beneficial for the heat exchange member 20 to adapt to the placement direction and position of the battery monomer 10, and to improve the layout flexibility, for example, the arrangement of the shunt flow channel 30 can be flexibly selected according to the requirements for flow, the size of the space around the flow channel, the shape of the heat exchange flow channel 21, etc. Figure 5As shown, the shunt flow channel 30 includes a first shunt flow channel 31 and a second shunt flow channel 32 arranged on both sides of the heat exchange flow channel 21 along the first direction (Y), the first shunt flow channel 31 is connected with the first shunt port 22A and the first flow port 23A of the heat exchange flow channel 21, and the second shunt flow channel 32 is connected with the second shunt port 22B and the second flow port 23B of the heat exchange flow channel 21; along the flow direction (X) of the heat exchange medium, the first flow port 23A is located on the upstream side of the second shunt port 22B.

[0146] Optionally, in other embodiments not shown, the first shunt flow channel 31 can be located Figure 5 on the opposite side of the first direction (Y) in the heat exchange member 20, and the second shunt flow channel 32 can also be located Figure 5 on the opposite side of the first direction (Y) in the heat exchange member 20.

[0147] Optionally, the size of the first shunt flow channel 31 and the second shunt flow channel 32 along the first direction can be the same or different, which is not limited in the present application.

[0148] Therefore, it is beneficial to adapt the heat exchange member 20 to the placement direction and position of the battery monomer 10, and improve the layout flexibility, for example, the arrangement of the shunt flow channel 30 can be flexibly selected according to the flow requirement, the size of the space around the flow channel, the shape of the heat exchange flow channel 21, etc.

[0149] In the embodiments of the present application, as shown in Figure 8 , the angle α between the straight section 30B and the first direction (Y) is not greater than 30° and not less than 10°.

[0150] Exemplarily, the angle α between the straight section 30B and the first direction (Y) is in a suitable range, which can be 10°, 15°, 20°, 25°, 30°, etc., and other values are not listed.

[0151] Therefore, the angle between the straight section 30B and the first direction (Y) is in a suitable range, which can reduce the impact of the heat exchange medium flowing into the heat exchange flow channel 21 from the shunt flow channel 30, reduce the local loss of the heat exchange medium when the flow direction changes at the fluid intersection, and balance the acceleration effect of the heat exchange medium and the coverage range of the shunt flow channel 30, thereby further improving the heat exchange capacity of the heat exchange member 20.

[0152] In the embodiments of the present application, the ratio of the inner diameter d1 of the shunt flow channel 30 to the inner diameter d2 of the heat exchange flow channel 21 is not less than 1 and not greater than 2.

[0153] It can be understood that the cross-sectional shape of the shunt flow channel 30 and the heat exchange flow channel 21 can be the same, which can be a circular groove or a square groove.

[0154] Exemplarily, as shown in Figure 7As shown, the inner diameter of the straight section 30B and the inner diameter of the bent section 30A in the shunt flow channel 30 can be the same, and the ratio of the inner diameter d1 of the shunt flow channel 30 to the inner diameter d2 of the heat exchange flow channel 21 is in a suitable range.

[0155] For example, the ratio of the inner diameter d1 to the inner diameter d2 can be 1, 1.1, 1.2, 1.3, 1.4, 1.5, 1.6, 1.7, 1.8, 1.9, 2.0, and the like, and other values are not listed. The inner diameter d1 of the shunt flow channel 30 is not less than the inner diameter d2 of the heat exchange flow channel 21, which can increase the flow of the shunt flow channel 30 to a certain extent and improve the heat exchange capacity of this part.

[0156] Therefore, the ratio of the inner diameter of the shunt flow channel 30 to the inner diameter of the heat exchange flow channel 21 is in a suitable range, which can balance the flow of the shunt flow channel 30 and the local resistance loss, and further improve the heat exchange capacity of the heat exchange member 20.

[0157] The second aspect of the embodiment of the application discloses an energy storage device 2000, which comprises a plurality of battery devices 100 according to the first aspect of the embodiment of the application, and the battery devices 100 are used for storing or providing electric energy.

[0158] For example, as shown in the figure, Figure 9 The energy storage device 2000 comprises a plurality of battery devices 100, and the battery devices 100 are used for storing or providing electric energy.

[0159] Since the energy storage device 2000 comprises the battery device 100 provided by the first aspect of the embodiment of the application, the heat exchange capacity of the energy storage device 2000 can be improved to a certain extent, which is beneficial to make the battery monomer 10 in a suitable working temperature environment.

[0160] The third aspect of the embodiment of the application is a power utilization device, which comprises the battery device 100 according to the first aspect of the embodiment of the application or the energy storage device 2000 according to the second aspect of the embodiment of the application, and the battery device 100 is used for storing or providing electric energy.

[0161] For example, as shown in the figure, Figure 1 The power utilization device can be a vehicle 1000, and the battery device 100 is arranged inside the vehicle 1000, which can be used for power supply of the vehicle 1000 to meet the working power demand of the vehicle 1000 during starting, navigation and driving.

[0162] Since the power utilization device comprises the battery device 100 provided by the first aspect of the embodiment of the application or the energy storage device 2000 provided by the second aspect of the embodiment of the application, the heat exchange capacity of the power utilization device can be improved to a certain extent, which is beneficial to make the battery monomer 10 in a suitable working temperature environment.

[0163] The application will be described in the following with specific embodiments.

[0164] The embodiment is directed to a heat exchange piece 20 (specifically, a water cooling plate 24) with a length of more than 3000 mm for a heat exchange channel 21 with a length-width ratio of more than 1500 mm*500 mm. The water cooling plate 24 is further provided with a shunt channel 30 in communication with the heat exchange channel 21. The shunt channel 30 can have the same structure as a Tesla valve structure unit. The heat exchange channel 21 is defined as from the medium inlet to the medium outlet, and the shunt channel 30 is in reference to the forward distribution of the Tesla valve. The shunt channel 30 includes a bending section 30A and a straight section 30B connected to each other. The bending section 30A is connected to the shunt port 22, and the straight section 30B is connected to the shunt port 23. A plurality of shunt channels 30 are arranged on one side and / or the other side of the heat exchange channel 21 along the first direction (Y).

[0165] In specific embodiments, the water cooling plate 24 is pressure cast according to the designed structure to form a specific concave topography of the water cooling channel during pressure casting.

[0166] In specific embodiments, as shown in Figure 8 , the shunt angle (i.e., the angle a between the straight section 30B and the heat exchange channel 21) is between 10° and 30°.

[0167] In specific embodiments, as shown in Figure 7 , the ratio of the inner diameter d1 of the shunt channel 30 to the inner diameter d2 of the heat exchange channel 21 is between 1 and 2.

[0168] In specific embodiments, along the flow direction (X) of the heat exchange medium, the farther away from the medium inlet of the heat exchange channel 21, the smaller the interval of the adjacent shunt channels 30. This can ensure that the heat exchange medium can flow quickly when returning to the channel, further improving the temperature consistency of the water cooling plate 24.

[0169] In specific embodiments, as shown in Figure 7 , the shunt channel 30 close to the outer side of the water cooling plate 24 is arranged as a single-sided structure along the first direction (Y), and the shunt channel 30 is away from the edge of the water cooling plate 24. The single-sided structure can improve the strength of the water cooling plate 24 while further improving the space utilization of the water cooling plate 24.

[0170] By changing the structure of the water cooling plate 24 channel, the channel area is expanded, and the acceleration effect of the Tesla valve is used to promote the directional flow of the heat exchange medium in the channel, reduce the flow resistance of the heat exchange medium, and thus reduce the pressure at the medium inlet, effectively improve the risk of liquid explosion at the medium inlet, and improve the water cooling effect.

[0171] If not specifically stated, all embodiments and optional embodiments of the application can be combined to form new technical solutions.

[0172] If there is no special description, all the technical features and optional technical features of the present application can be combined to form new technical solutions.

[0173] The above embodiments are only used to illustrate the technical solutions of the present application, but not limit them. Although the present application has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that the technical solutions recorded in the foregoing embodiments can still be modified, or some or all of the technical features can be replaced by equivalents. 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. In particular, 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 application relates to a battery pack, comprising a box body having a containing space, a battery cell arranged in the containing space; a heat exchange member for heat exchange with the battery cell, the heat exchange member being provided with a heat exchange flow channel for the flow of a heat exchange medium, the heat exchange flow channel having a branch flow port and a converging flow port, the branch flow port being located on the upstream side of the converging flow port along the flow direction of the heat exchange medium; a branch flow channel in communication with the branch flow port and the converging flow port of the heat exchange flow channel, the branch flow channel comprising a connected bending section and a straight section, the bending section being connected to the branch flow port, and the straight section being connected to the converging flow port; a plurality of branch flow channels are arranged on one side of the heat exchange flow channel along a first direction, and / or a plurality of branch flow channels are arranged on the other side of the heat exchange flow channel along the first direction, the first direction being perpendicular to the flow direction of the heat exchange medium.

2. The battery device according to claim 1, characterized by The bending section is of an arc structure, and the center of curvature of the bending section is located on the side of the bending section close to the straight section, and the straight section forms an acute angle with the connected heat exchange flow channel.

3. The battery device of claim 2, wherein Along the flow direction of the heat exchange medium, the closer to the medium inlet of the heat exchange flow channel, the smaller the interval between adjacent branch flow channels.

4. The battery device according to any one of claims 1 to 3, characterized by, Along the first direction, a plurality of branch flow channels are arranged on the same side of the heat exchange flow channel.

5. The battery device according to any one of claims 1 to 3, characterized by, The branch flow channel comprises a first branch flow channel and a second branch flow channel arranged on both sides of the heat exchange flow channel along the first direction, the first branch flow channel being connected to a first branch flow port and a first converging flow port of the heat exchange flow channel, and the second branch flow channel being connected to a second branch flow port and a second converging flow port of the heat exchange flow channel; along the flow direction of the heat exchange medium, the first branch flow port and the second branch flow port are located at the same position, and the first converging flow port and the second converging flow port are located at the same position.

6. The battery device according to any one of claims 1 to 3, wherein The branch flow channel comprises a first branch flow channel and a second branch flow channel arranged on both sides of the heat exchange flow channel along the first direction, the first branch flow channel being connected to a first branch flow port and a first converging flow port of the heat exchange flow channel, and the second branch flow channel being connected to a second branch flow port and a second converging flow port of the heat exchange flow channel; along the flow direction of the heat exchange medium, the first branch flow port is located on the upstream side of the second branch flow port, and the first converging flow port is located between the second branch flow port and the second converging flow port.

7. The battery device according to any one of claims 1 to 3, characterized by, The branch flow channel comprises a first branch flow channel and a second branch flow channel arranged on both sides of the heat exchange flow channel along the first direction, the first branch flow channel being connected to a first branch flow port and a first converging flow port of the heat exchange flow channel, and the second branch flow channel being connected to a second branch flow port and a second converging flow port of the heat exchange flow channel; along the flow direction of the heat exchange medium, the first converging flow port is located on the upstream side of the second branch flow port.

8. The battery device according to any one of claims 1 to 3, characterized by, The included angle between the straight section and the first direction is not greater than 30 degrees and not less than 10 degrees.

9. The battery device according to any one of claims 1 to 3, characterized by, The ratio of the inner diameter of the branch flow channel to the inner diameter of the heat exchange flow channel is not less than 1 and not greater than 2.

10. The battery device according to any one of claims 1 to 9, characterized by, The heat exchange member is a water-cooled plate, and the heat exchange flow channels include edge pipe sections, and the branch flow channels provided on the edge pipe sections are provided on the side away from the edge of the water-cooled plate along the first direction; the edge pipe section is the heat exchange flow channel closest to the edge of the water-cooled plate.

11. The battery device of claim 10, wherein, The length of the water-cooled plate is more than 1500 mm, and / or the width of the water-cooled plate is more than 500 mm, and / or the length of the heat exchange flow channel is greater than 3000 mm.

12. An energy storage device, characterized by The battery device of any one of claims 1 to 11 is used for storing or providing electric energy.

13. An electrical device, characterized by The battery device of any one of claims 1 to 11 or the energy storage device of claim 12 is used for storing or providing electric energy.

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