Battery device and electric device

Abstract

The utility model discloses a battery device and a power utilization device, the battery device comprises a box body, a battery assembly and a heat management part, the heat management part is provided with a plurality of heat exchange runners, the plurality of heat exchange runners are arranged in sequence from outside to inside, and the internal heat exchange runner is located in the area range of the external heat exchange runner; at least two heat exchange flow channels in the multiple heat exchange flow channels are configured to be arranged in an independent water inlet and outlet mode. According to the technical scheme, the plurality of heat exchange runners are sequentially arranged from outside to inside, and at least two heat exchange runners in the plurality of heat exchange runners are configured to realize independent water inlet and outlet, so that the heat exchange runners for independent water inlet and outlet can be independently controlled, and independent heat management of the battery assembly in different regions from outside to inside is realized; the temperature difference generated by the peripheral area and the internal area of the battery assembly due to environmental heat dissipation is balanced, the temperature uniformity of the battery assembly is improved, the service life of the battery device is prolonged, the thermal management efficiency of the battery assembly can be improved, and the energy consumption is reduced.

Description

Technical Field

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

[0002] In the related art, the thermal insulation of the battery pack is poor, resulting in a large temperature difference inside the battery pack, which affects the working performance of the battery pack. Utility Model Content

[0003] The present application aims to solve at least one of the technical problems existing in the prior art. To this end, the present application proposes a battery device and an electrical device including the battery device, which can improve the temperature uniformity of the battery assembly and extend the service life of the battery device.

[0004] In the first aspect, an embodiment of the present application provides a battery device, which includes: a box body; a battery assembly, which is arranged in the box body; a thermal management component, which is used for heat exchange with the battery assembly, and the thermal management component has a plurality of heat exchange channels, which are arranged in sequence from the outside to the inside, and the internal heat exchange channels are located within the area of ​​the external heat exchange channels; wherein, at least two of the multiple heat exchange channels are configured as independent water inlet and outlet settings.

[0005] In the above technical solution, since multiple heat exchange channels are arranged in sequence from the outside to the inside, and at least two of the multiple heat exchange channels are configured to have independent water inlet and outlet, the heat exchange channels with independent water inlet and outlet can be independently controlled to achieve independent temperature control of the battery assembly from the outside to the inside. This can not only improve the thermal management efficiency of the battery assembly and reduce energy consumption, but also balance the temperature difference between the peripheral area and the internal area of ​​the battery assembly due to environmental heat dissipation, thereby improving the temperature uniformity of the battery assembly and increasing the service life of the battery device.

[0006] According to some embodiments of the present application, the multiple heat exchange channels include a first heat exchange channel and a second heat exchange channel. The first heat exchange channel extends and bends along the circumference of the battery assembly and encloses an arrangement area. The second heat exchange channel is arranged in the arrangement area enclosed by the first heat exchange channel.

[0007] In the above technical solution, a first heat exchange channel extending along the periphery of the battery assembly is provided for heat exchange with the periphery of the battery assembly, while a second heat exchange channel arranged inside the first heat exchange channel is provided for heat exchange with the interior of the battery assembly. By independently allowing water to flow in and out of the first and second heat exchange channels, the temperature difference between the periphery and interior of the battery assembly due to ambient heat dissipation can be balanced, thereby improving the temperature uniformity of the battery assembly and extending the service life of the battery device. Furthermore, the thermal management efficiency of the battery assembly can be improved, reducing energy consumption.

[0008] According to some embodiments of the present application, the first heat exchange channel bends and extends along the circumference of the battery assembly to form a U-shape with one side open in the first direction.

[0009] In the above technical solution, the first heat exchange channel is extended into a U shape, and the first heat exchange channel can extend at least along three sides of the battery assembly, so that the first heat exchange channel can exchange heat with more peripheral areas of the battery assembly, thereby improving the thermal management effect of the peripheral areas of the battery assembly, and also improving the temperature uniformity performance of the peripheral areas of the battery assembly.

[0010] According to some embodiments of the present application, both ends of the U-shaped opening of the first heat exchange channel extend beyond the periphery of the battery assembly in the first direction.

[0011] In the above technical solution, since both ends of the U-shaped opening of the first heat exchange channel extend beyond the battery assembly, the two ends of the first heat exchange channel extending beyond the battery assembly can be used to perform thermal management for the electrical components in the electrical cavity, so that the electrical components in the electrical cavity operate within a suitable temperature range. At the same time, it can also be used to heat the beam structure provided between the electrical cavity and the battery cavity, such as an expansion beam, so that heat can be exchanged with the battery assembly located at the opening position of the first heat exchange channel through the beam structure, thereby realizing direct or indirect heat exchange between the first heat exchange channel and the entire peripheral area of ​​the battery assembly, thereby improving the temperature uniformity of the entire peripheral area of ​​the battery assembly.

[0012] According to some embodiments of the present application, the first heat exchange channel includes multiple first flow channel sections, which extend along the circumference of the battery assembly into a U-shape with one side open in the first direction. The openings of the multiple first flow channel sections have the same direction, and the multiple first flow channel sections are connected in sequence and arranged inside and outside.

[0013] In the above technical solution, the first heat exchange channel includes multiple U-shaped first channel sections that are connected in sequence and arranged inside and outside, which can increase the heat exchange area between the first heat exchange channel and the peripheral area of ​​the battery assembly and improve the heat exchange efficiency. At the same time, multiple first channel sections can improve the temperature uniformity of the peripheral area of ​​the battery assembly.

[0014] According to some embodiments of the present application, the first flow channel segment arranged near the peripheral side of the battery assembly is connected to the upstream of the first flow channel segment arranged near the second heat exchange flow channel in the fluid flow direction; or, when the thermal management component heats the battery assembly, the first flow channel segment arranged near the peripheral side of the battery assembly is connected to the upstream of the first flow channel segment arranged near the second heat exchange flow channel in the fluid flow direction; when the thermal management component cools the battery assembly, the first flow channel segment arranged near the peripheral side of the battery assembly is connected to the downstream of the first flow channel segment arranged near the second heat exchange flow channel in the fluid flow direction.

[0015] In the above technical solution, because the first flow channel section arranged near the periphery of the battery assembly is located upstream of the first flow channel section arranged near the second heat exchange flow channel section, the first flow channel section arranged near the periphery of the battery assembly can preferentially exchange heat with the outermost area of ​​the periphery of the battery assembly, thereby further improving the temperature difference between the inside and outside of the periphery of the battery assembly and enhancing temperature uniformity. In addition, the temperature distribution uniformity of the periphery of the battery assembly can be improved under both heating and cooling conditions, thereby extending the service life of the battery device.

[0016] According to some embodiments of the present application, the second heat exchange channel bends and extends within the arrangement area.

[0017] In the above technical solution, since the second heat exchange channel bends and extends within the layout area, not only can the length of the second heat exchange channel be extended, the heat exchange area of ​​the second heat exchange channel be increased, and the heat exchange efficiency be improved, but the second heat exchange channel can also be distributed more evenly in the internal area of ​​the battery assembly, thereby improving the temperature uniformity of the internal area of ​​the battery assembly.

[0018] According to some embodiments of the present application, the second heat exchange channel includes multiple straight segments and at least one bent segment, the multiple straight segments extend along the first direction and are arranged at intervals in the second direction, and the multiple straight segments are connected in sequence through the bent segments.

[0019] In the above technical solution, since the second heat exchange channel includes multiple straight segments and bent segments connecting adjacent straight segments, the structure of the second heat exchange channel can be simplified while increasing the length of the second heat exchange channel, increasing the heat exchange area, and improving the heat exchange efficiency. The second heat exchange channel can be evenly extended in the internal area of ​​the battery assembly, thereby improving the temperature uniformity of the internal area of ​​the battery assembly.

[0020] According to some embodiments of the present application, the heat management component includes a plurality of bent and extended heat exchange tubes, and a heat exchange channel is defined on the inner side of each heat exchange tube.

[0021] In the above technical solution, the heat management component includes a plurality of bent and extended heat exchange tubes. Compared with the plate-like structure, the heat exchange tubes have a simple structure, are easy to process, and have low cost.

[0022] According to some embodiments of the present application, a separation rib is provided in the heat exchange tube, and the separation rib extends along the extension direction of the heat exchange tube and divides the heat exchange flow channel in the heat exchange tube into multiple sub-flow channels.

[0023] In the above technical solution, the provision of separator ribs within the heat exchange tubes increases the heat transfer area of ​​the heat exchange tubes, improving the heat transfer efficiency of the heat exchange tubes and enhancing the thermal management of the battery device. Furthermore, the provision of separator ribs also enhances the structural strength of the heat exchange tubes, extending the service life of the thermal management components.

[0024] According to some embodiments of the present application, the thermal management component includes a plurality of control valves, the plurality of control valves correspond one-to-one to the plurality of heat exchange channels, and the control valves are connected in series with the corresponding heat exchange channels.

[0025] In the above technical solution, since the control valve corresponds to the heat exchange channel one by one and is connected in series with the corresponding heat exchange channel, the water inlet and outlet of the corresponding heat exchange channel can be easily controlled independently, the structure is simplified, and the control is simple and convenient.

[0026] According to some embodiments of the present application, the control valve is connected in series to the upstream side of the inlet of the corresponding heat exchange channel.

[0027] In the above technical solution, since the control valve is connected in series on the upstream side of the inlet of the heat exchange channel, there is enough space to arrange the control valve, and the control valve can also be used to control the heat exchange fluid flowing into the heat exchange channel from the external pipeline, and it is more convenient to maintain and manage the control valve.

[0028] According to some embodiments of the present application, the control valve is a normally open valve.

[0029] In the above technical solution, the normally open control valve ensures that the heat exchange fluid can flow freely without the need for additional control, thereby maintaining basic thermal management efficiency for the battery assembly and reducing unnecessary control system complexity. Furthermore, if an abnormality occurs in the battery assembly, the normally open control valve ensures that the fluid can flow smoothly into the heat exchange channel to exchange heat for the battery assembly, reducing the probability of thermal runaway.

[0030] According to some embodiments of the present application, the thermal management component further includes a current collector, which defines a plurality of liquid inlet cavities, and the plurality of liquid inlet cavities correspond one-to-one to and are connected with the inlets of the plurality of heat exchange channels.

[0031] In the above technical solution, since the collector has multiple liquid inlet cavities corresponding to and connected to multiple heat exchange channels, the heat exchange fluid can easily enter the heat exchange channels through the corresponding liquid inlet cavities, thereby improving the control efficiency of the heat exchange fluid.

[0032] According to some embodiments of the present application, the thermal management component further includes a plurality of liquid inlet pipes, which are all connected to the current collector and correspond one-to-one to and communicate with the plurality of liquid inlet cavities, and the control valve is serially connected to the liquid inlet pipes.

[0033] In the above technical solution, since multiple liquid inlet pipes correspond to and are connected to multiple liquid inlet cavities one by one, the control valve is connected in series to the corresponding liquid inlet pipe. In this way, the flow rate at the inlet of the heat exchange channel can be conveniently controlled, and the control valve can also be conveniently connected and arranged, making it convenient to maintain the control valve.

[0034] According to some embodiments of the present application, the current collector is further formed with a liquid outlet cavity, wherein the number of the liquid outlet cavity is one, and the outlets of multiple heat exchange channels are all connected to the liquid outlet cavity; or, the number of the liquid outlet cavity is multiple, and the multiple liquid outlet cavities correspond one-to-one to and are connected to the outlets of multiple heat exchange channels.

[0035] In the above technical solution, by providing a single liquid outlet cavity, the outlets of multiple heat exchange channels are all connected to the liquid outlet cavity, which simplifies the collector structure and reduces costs. By providing multiple liquid outlet cavities and ensuring that the outlets of multiple heat exchange channels correspond to and connect with the multiple liquid outlet cavities one by one, the mutual influence between the outlets of the multiple heat exchange channels can be reduced.

[0036] According to some embodiments of the present application, the battery device further includes: a plurality of temperature sensors, the temperature sensors being arranged at intervals on the battery assembly, and the temperature sensors being electrically connected to the control valve.

[0037] In the above technical solution, since multiple temperature sensors are electrically connected to multiple control valves, the flow rate of the heat exchange fluid in the heat exchange channel corresponding to the control valve can be adjusted according to the temperature value detected by each temperature sensor, thereby achieving precise temperature control of each area of ​​the battery assembly corresponding to each heat exchange channel, improving thermal management efficiency, and enhancing the temperature uniformity of the battery assembly.

[0038] According to some embodiments of the present application, the battery assembly includes multiple battery cell assemblies, which are arranged along the first direction and / or the second direction, each battery cell assembly includes at least one battery cell, and each battery cell assembly is provided with at least one temperature sensor.

[0039] In the above technical solution, since at least one temperature sensor is provided in each battery cell assembly, the temperature of each battery cell assembly can be detected in real time, which facilitates thermal management of each battery cell assembly and ensures that the battery cell assembly operates within a suitable temperature range.

[0040] According to some embodiments of the present application, the thermal management component is disposed in the box and is located between the battery assembly and the bottom wall and / or top wall of the box.

[0041] In the above technical solution, because the thermal management component is positioned between the battery assembly and the top and / or bottom walls of the housing, the thermal management component's multiple heat exchange channels can exchange heat with all the battery cells in the battery assembly, improving thermal management efficiency, increasing space utilization within the battery device, and achieving a compact structure. Furthermore, the thermal management component can directly exchange heat with the battery assembly, further improving heat exchange efficiency and reducing heat loss.

[0042] In a second aspect, an embodiment of the present application provides an electrical device comprising a battery device according to the first aspect of the present application.

[0043] In the above embodiment, by arranging the battery device of the first aspect, since the battery device is arranged in the electrical device, and since each heat exchange channel of the thermal management member of the battery device is connected in series with a corresponding control valve, the first heat exchange channel extends along the circumference of the battery assembly and encloses a layout area, and the second heat exchange channel is arranged in the layout area, so that the first heat exchange channel and the second heat exchange channel can be independently controlled by the control valves, and independent temperature control of the circumferential area and the internal area of the battery assembly can be realized, so that not only the thermal management efficiency of the battery assembly can be improved, and the energy consumption can be reduced, but also the temperature difference between the circumferential area and the internal area of the battery assembly due to environmental heat dissipation can be balanced, the temperature uniformity of the battery assembly can be improved, and the service life of the battery device can be improved, so that the overall performance of the electrical device is improved.

[0044] Additional aspects and advantages of the application will be set forth in part in the description which follows, and in part will become apparent to those skilled in the art upon examination of the following and / or can be learned by practice of the application. BRIEF DESCRIPTION OF DRAWINGS

[0045] Figure 1 is a schematic view of a vehicle according to an embodiment of the application;

[0046] Figure 2 is an exploded view of a battery device according to an embodiment of the application;

[0047] Figure 3 is a schematic view of a battery assembly and a thermal management member according to an embodiment of the application;

[0048] Figure 4 is a schematic view of a thermal management member of a battery device according to an embodiment of the application from one angle;

[0049] Figure 5 is a schematic view of a thermal management member of a battery device according to an embodiment of the application from another angle;

[0050] Figure 6 is an exploded view of a thermal management member of a battery device according to an embodiment of the application.

[0051] LIST OF REFERENCE SIGNS

[0052] 1. an electrical device;

[0053] 1000. a battery device; 2000. a controller; 3000. a motor;

[0054] 100. a box body; 110. a box main body; 120. a cover plate; 101. a containing cavity;

[0055] 200. a battery assembly; 210. a battery monomer assembly;

[0056] 300. a thermal management member;

[0057] 30a, heat exchange flow channel;

[0058] 301, first heat exchange channel; 3010, layout area; 3011, first channel section;

[0059] 30111, first paragraph; 30112, second paragraph; 30113, third paragraph;

[0060] 30114, first bending portion; 30115, second bending portion; 30116, third bending portion;

[0061] 3012, first entrance and exit section; 3013, fourth bending portion;

[0062] 30121, first extension portion; 30122, second extension portion; 30123, fifth bending portion;

[0063] 302, second heat exchange channel; 3021, straight section; 3022, curved section;

[0064] 3023, second entry and exit section; 3024, third entry and exit section;

[0065] 31. Heat exchange tube; 32. Control valve; 33. Collector; 331. Collector body; 332. End cover; 333. Partition;

[0066] 34. Liquid inlet pipe; 35. Liquid outlet pipe. DETAILED DESCRIPTION

[0067] The following embodiments of the technical solution of the present application will be described in detail with reference to the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present application and are therefore only examples and are not intended to limit the scope of protection of the present application.

[0068] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the art to which this application belongs; the terms used herein are only for the purpose of describing specific embodiments and are not intended to limit this application; the terms "including" and "having" and any variations thereof in the specification and claims of this application and the above-mentioned figure descriptions are intended to cover non-exclusive inclusions.

[0069] In the description of the embodiments of this application, the technical terms "first" and "second" are used only to distinguish different objects and should not be understood to indicate or imply relative importance or implicitly specify the quantity, specific order, or primary and secondary relationship of the indicated technical features. In the description of the embodiments of this application, the meaning of "plurality" is more than two, unless otherwise clearly and specifically defined.

[0070] Reference to "an embodiment" or "the 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 appearances of the phrase "in one embodiment" or "in an embodiment" in various places in the specification are not necessarily all referring to the same embodiment, nor are they necessarily all referring to a common embodiment, or an embodiment that is independent of all other embodiments. One of ordinary skill in the art will recognize that the embodiments described herein can be combined with other embodiments in various ways.

[0071] In the description of the embodiments of the present application, the term "and / or" is merely used to describe associated objects, and can represent the three conditions of A and / or B, that is, A exists alone, both A and B exist, and B exists alone. In addition, the character " / " in the present application generally indicates that the associated objects before and after the " / " have an "or" relationship.

[0072] In the description of the embodiments of the present application, the term "plurality" refers to two or more (including two).

[0073] 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", "axial", "radial", "circumferential", and the like indicate the orientation or positional relationship shown in the drawings, and are only used for the convenience of describing the embodiments of the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the embodiments of the present application.

[0074] In the description of the embodiments of the present application, unless otherwise explicitly specified and limited, the technical terms "mounting", "connection", "connecting", "fixing", and the like should be understood in a broad sense, for example, can be fixed connection, or detachable connection, or integral; can be mechanical connection, or electrical connection; can be direct connection, or indirect connection through an intermediate medium; can be internal connection of two elements or 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.

[0075] 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 one or more battery cells, and when there are multiple battery cells, the multiple battery cells are connected in series, in parallel, or in a hybrid connection through a busbar component.

[0076] In some embodiments, a battery cell assembly is typically formed by arranging multiple battery cells. For example, the battery cell assembly may be a battery module, which is a battery module formed by arranging and securing multiple battery cells to form a single module. For example, a battery module may be formed by bundling multiple battery cells using cable ties.

[0077] In some embodiments, the battery device may be a battery pack, which includes a case and one or more battery cell assemblies, wherein the battery cell assemblies are housed in the case.

[0078] As an example, the battery cell assembly may be a battery module, and the battery cell assembly may be accommodated in the box by fixing the battery module in the box.

[0079] As an example, the battery cell assembly may also be housed in the box by directly fixing the plurality of battery cells to the box.

[0080] As an example, the housing may include a first housing and a second housing. The first housing and the second housing engage to form an enclosed space within the housing to house the battery cell assembly. Enclosed here means covered or closed, and can be either sealed or unsealed. The first housing may be a top cover or a bottom plate.

[0081] As an example, the box may include a top cover, a frame, and a bottom plate, wherein the top cover and the bottom plate are respectively connected to the frame to form a closed space inside the box to accommodate the battery cell assembly.

[0082] As an example, the box body can be used as a part of the chassis structure of the vehicle. For example, the top cover of the box body can become at least a part of the floor of the vehicle, or the frame of the box body can become at least a part of the crossbeam and longitudinal beam of the vehicle.

[0083] In some embodiments, the battery device refers to an energy storage device, which includes a box with a door on at least one side. The energy storage device includes an energy storage container, an energy storage cabinet, etc.

[0084] The battery cells mentioned in the embodiments of this application may include lithium-ion secondary batteries, lithium-ion primary batteries, lithium-sulfur batteries, sodium-lithium-ion batteries, sodium-ion batteries, or magnesium-ion batteries, etc., and the embodiments of this application do not limit this. The battery cells may be cylindrical, flat, rectangular, or other shapes, etc., and the embodiments of this application do not limit this. Battery cells are generally divided into three types according to the packaging method: cylindrical battery cells, square battery cells, and soft-pack battery cells, and the embodiments of this application do not limit this.

[0085] For example, a battery cell typically includes a housing, a cell assembly, and an electrolyte. The housing is used to house the cell assembly and electrolyte, and is provided with at least one positive electrode post and at least one negative electrode post. The cell assembly includes one or more electrode assemblies, which are formed by stacking or winding positive and negative electrode sheets and separators.

[0086] The technical solutions described in the embodiments of the present application are applicable to various electrical devices that use battery cells and battery devices, such as mobile phones, portable devices, laptops, electric vehicles, electric toys, electric tools, vehicles, ships and spacecraft, etc. For example, spacecraft include airplanes, rockets, space shuttles and spacecraft, etc.

[0087] In recent years, new energy vehicles have experienced rapid development. In this field, batteries, as the power source of electric vehicles, play an irreplaceable and important role. As core components of new energy vehicles, batteries have high requirements in terms of both energy density and reliability.

[0088] The temperature environment within a battery device is affected by external weather conditions. The battery cells within the device must operate within a certain temperature range. If the temperature within the device exceeds or falls below this range, the stability and performance of the device will be significantly affected. For example, in hot weather, the battery cells within the device must be cooled and dissipated to maintain the desired temperature range. In cold weather, the battery cells must be heated to maintain the desired temperature range.

[0089] In the battery device in the related art, the casing is generally a metal part, and the passive thermal insulation performance of the metal casing is poor. After the heat exchange flow channel design of the thermal management component of the battery device is completed, the temperature zone within the battery assembly of the battery device is fixed. However, due to the different environmental working conditions of the battery device, the heat dissipation at various positions of the battery assembly of the battery device is inconsistent, which leads to large temperature differences within the battery assembly.

[0090] Based on the above considerations, in order to improve the temperature uniformity within the battery device, the present application designs a battery device in which the thermal management component of the battery device is formed with multiple heat exchange channels, which are arranged in sequence from the outside to the inside, and the internal heat exchange channels are located within the area of ​​the external heat exchange channels. At least two of the multiple heat exchange channels are configured with independent water inlet and outlet settings. In this way, the independent water inlet and outlet heat exchange channels can be independently controlled to achieve independent thermal management of the battery assembly from the outside to the inside, improve the thermal management efficiency of the battery assembly, reduce energy consumption, and balance the temperature difference between the peripheral area and the internal area of ​​the battery assembly due to environmental heat dissipation, thereby improving the temperature uniformity of the battery assembly and extending the service life of the battery device.

[0091] The present application provides an electrical device that uses the battery device of the present disclosure as a power source. The electrical device may be, but is not limited to, a mobile phone, a tablet, a laptop computer, an electric toy, an electric tool, a battery-powered vehicle, an electric car, a ship, a spacecraft, and the like. The electric toy may include a fixed or mobile electric toy, such as a game console, an electric car toy, an electric ship toy, and an electric airplane toy, and the like. The spacecraft may include an airplane, a rocket, a space shuttle, and a spacecraft, and the like.

[0092] For the convenience of description, the following embodiments take the electric device 1 as a vehicle as an example to introduce the structures of the electric device 1, the battery device 1000 and the battery cells of the present application in detail.

[0093] Please refer to Figure 1 , Figure 1 The power-consuming device 1 provided for some embodiments of the present application is a structural diagram of a vehicle. The vehicle can be a fuel vehicle, a gas vehicle or a new energy vehicle, and the new energy vehicle can be a pure electric vehicle, a hybrid vehicle or an extended-range vehicle, etc. The vehicle is provided with a battery device 1000, and the battery device 1000 can be arranged at the bottom, head or tail of the vehicle. The battery device 1000 can be used to power the vehicle, for example, the battery device 1000 can be used as an operating power source for the vehicle. The vehicle may also include a controller 2000 and a motor 3000, and the controller 2000 is used to control the battery device 1000 to power the motor 3000, for example, for the starting, navigation and working power requirements of the vehicle during driving. In some embodiments of the present application, the battery device 1000 can not only serve as the operating power source of the vehicle, but also as the driving power source of the vehicle, replacing or partially replacing fuel or natural gas to provide driving power for the vehicle.

[0094] Reference below Figures 2-6 A battery device 1000 according to an embodiment of the first aspect of the present application is described.

[0095] Please refer to Figure 2 , Figure 2 This is an exploded view of the structure of a battery device 1000 provided in some embodiments of the present application. The battery device 1000 includes a housing 100 and a plurality of battery cell assemblies 210. The housing 100 is used to provide assembly space for the battery cell assemblies 210. The battery cell assemblies 210 are accommodated within the housing 100 and include one or more battery cells.

[0096] For ease of description, the length direction of the battery device 1000 is defined as a first direction X, the width direction of the battery device 1000 is defined as a second direction Y, and the height direction of the battery device 1000 is defined as a third direction Z. The first direction X, the second direction Y, and the third direction Z intersect with each other. In a specific example, the first direction X is the front-to-back direction, the second direction Y is the left-to-right direction, and the third direction Z is the up-down direction.

[0097] Figure 3 is a schematic diagram of a battery assembly 200 and a thermal management component 300 according to an embodiment of the present application; Figure 4 is a schematic diagram of a thermal management component 300 of a battery device 1000 according to an embodiment of the present application from one angle; Figure 5 is a schematic diagram of the thermal management component 300 of the battery device 1000 according to an embodiment of the present application from another angle; Figure 6 FIG. 1 is an exploded view of the thermal management component 300 of the battery device 1000 according to an embodiment of the present application from another angle.

[0098] The embodiment of the present application proposes a battery device 1000, such as Figure 2 As shown, the battery device 1000 includes: a box body 100, a battery assembly 200 and a thermal management component 300, the battery assembly 200 is arranged in the box body 100, and the thermal management component 300 is used for heat exchange with the battery assembly 200, wherein the thermal management component 300 has a plurality of heat exchange channels 30a, and the plurality of heat exchange channels 30a are arranged in sequence from the outside to the inside, and the internal heat exchange channels 30a are located within the area of ​​the external heat exchange channels 30a; wherein, at least two of the plurality of heat exchange channels 30a are configured as independent water inlet and outlet settings.

[0099] In one example, the box body 100 includes a box body 110 and a cover 120. The box body 110 is formed with a accommodating cavity 101 with an open top. The cover 120 is arranged on the top of the box body 110 and covers the accommodating cavity 101. Furthermore, the accommodating cavity 101 can be divided into a battery cavity and an electrical cavity arranged at intervals. The battery assembly 200 is disposed in the battery cavity, and the electrical cavity can be used to accommodate other electrical components of the battery device 1000. The battery cavity and the electrical cavity can be arranged at intervals along the first direction X.

[0100] In one example, the box body 110 and the cover 120 of the box body 100 are both made of metal to improve the structural strength of the box body 100 .

[0101] In one example, the battery assembly 200 includes a plurality of battery cells, which may be arranged sequentially along a first direction X and / or a second direction Y. The thermal management component 300 may be disposed within the housing 100 or may be arranged outside the housing 100. When the thermal management component 300 is disposed within the housing 100, the thermal management component 300 may directly exchange heat with the battery assembly 200. The thermal management component 300 may be disposed at the top and / or bottom of the battery assembly 200, or may be disposed around the battery assembly 200, or may be disposed between adjacent battery cells of the battery assembly 200.

[0102] In one example, the thermal management component 300 may include a cold plate with a plurality of heat exchange channels 30 a directly formed therein. The thermal management component 300 may also include a heat exchange tube 31 with the heat exchange channels 30 a defined therein.

[0103] The heat management component 300 has a plurality of heat exchange channels 30 a . For example, the heat management component 300 may have two, three, four, five, six or more heat exchange channels 30 a .

[0104] The phrase "the plurality of heat exchange channels 30a are arranged sequentially from the outside to the inside" means that the plurality of heat exchange channels 30a are arranged sequentially from the edge to the center of the thermal management component 300. Furthermore, of the two adjacent heat exchange channels 30a arranged inside and outside, the heat exchange channel 30a near the center of the thermal management component 300 is arranged within the region of the heat exchange channels 30a near the edge of the thermal management component 300. In other words, the heat exchange channels 30a near the edge of the thermal management component 300 enclose a certain region (such as the arrangement region 3010 described below), and the heat exchange channels 30a near the center of the thermal management component 300 is arranged within this region.

[0105] Only a portion of the multiple heat exchange channels 30a may be configured with independent water inlet and outlet, or each of the multiple heat exchange channels 30a may be configured with independent water inlet and outlet. For example, two, three, four, five, or more heat exchange channels 30a may be configured with independent water inlet and outlet.

[0106] Here, “the heat exchange channel 30a is configured with independent water inlet and outlet” means that the water inlet and water outlet of the heat exchange channel 30a are completely independent and have no relation with and do not interfere with the water inlet and water outlet of other heat exchange channels 30a.

[0107] Since at least two heat exchange channels 30a are configured to have independent water inlet and outlet, the flow rate of the heat exchange fluid in the heat exchange channel 30a can be independently controlled, thereby controlling the heat exchange amount between the heat exchange channel 30a and the corresponding area, thereby achieving zoning control of multiple areas of the battery assembly 200, improving the thermal management efficiency of the battery assembly 200, and reducing energy consumption.

[0108] For example, the outer peripheral side of the battery assembly 200 is in direct contact with the housing 100, and the housing 100 directly exchanges heat with the external environment, resulting in inconsistent heat dissipation between the peripheral area and the internal area of ​​the battery assembly 200, so that the temperature of the battery assembly 200 gradually increases in the direction from the periphery of the battery assembly 200 toward the center, resulting in a large temperature difference between the peripheral area and the internal area of ​​the battery assembly 200.

[0109] Therefore, in response to the temperature changes from the outside to the inside of the battery assembly 200, the present application arranges multiple heat exchange channels 30a in sequence from the outside to the inside, especially the heat exchange channels 30a on the outermost side of the battery assembly 200, which can be configured to have independent water inlet and outlet. In this way, the peripheral area of ​​the battery assembly 200 can be thermally managed separately, and the heat loss caused by the environmental heat dissipation in the peripheral area of ​​the battery assembly 200 is balanced, thereby improving the temperature uniformity of the battery assembly 200 and improving the service life of the battery device 1000.

[0110] In the above technical solution, since multiple heat exchange channels 30a are arranged in sequence from the outside to the inside, and at least two heat exchange channels 30a among the multiple heat exchange channels 30a are configured to have independent water inlet and outlet, the heat exchange channels 30a with independent water inlet and outlet can be independently controlled to achieve independent temperature control of the battery assembly 200 from the outside to the inside. This can not only improve the thermal management efficiency of the battery assembly 200 and reduce energy consumption, but also balance the temperature difference between the peripheral area and the internal area of ​​the battery assembly 200 caused by environmental heat dissipation, thereby improving the temperature uniformity of the battery assembly 200 and improving the service life of the battery device 1000.

[0111] In some embodiments of the present application, the plurality of heat exchange channels 30a include a first heat exchange channel 301 and a second heat exchange channel 302. The first heat exchange channel 301 extends and bends along the circumference of the battery assembly 200 and encloses an arrangement area 3010. The second heat exchange channel 302 is arranged in the arrangement area 3010 enclosed by the first heat exchange channel 301.

[0112] At least one of the multiple heat exchange channels 30a is formed as a first heat exchange channel 301. When the number of first heat exchange channels 301 is one, one first heat exchange channel 301 bends and extends along the circumference of the battery assembly 200 and encloses an arrangement area 3010. When the number of first heat exchange channels 301 is multiple, multiple first heat exchange channels 301 all bend and extend along the circumference of the battery assembly 200 and cooperate with each other to enclose an arrangement area 3010.

[0113] For example, the first heat exchange channel 301 can be bent and extended along the circumference of the battery assembly 200 into a ring shape, for example, bent and extended into a rectangular ring shape, a polygonal ring shape or a circular ring shape. The first heat exchange channel 301 can also be bent and extended along the circumference of the battery assembly 200 into a U shape. The first heat exchange channel 301 can also be bent and extended along the circumference of the battery assembly 200 into an L shape or a V shape.

[0114] Because the first heat exchange channel 301 extends along the circumference of the battery assembly 200, it can exchange heat with the surrounding areas of the battery assembly 200, maintaining the surrounding areas or surrounding areas of the battery assembly 200 within a suitable temperature range. When the first heat exchange channel 301 is configured with independent water inlet and outlet, independent thermal management of the surrounding areas of the battery assembly 200 can be achieved, balancing the temperature difference between the surrounding areas and the internal areas of the battery assembly 200 caused by environmental heat dissipation, thereby improving the temperature uniformity of the battery assembly 200.

[0115] At least one of the multiple heat exchange channels 30a is formed as a second heat exchange channel 302, wherein the number of second heat exchange channels 302 can be one, two, three, four, or more. The second heat exchange channel 302 is arranged within the arrangement area 3010 enclosed by the first heat exchange channel 301. Since the second heat exchange channel 302 is arranged inside the first heat exchange channel 301, the second heat exchange channel 302 can exchange heat with the interior area of ​​the battery assembly 200, thereby maintaining the interior area of ​​the battery assembly 200 within a suitable temperature range.

[0116] When there are multiple second heat exchange channels 302, the multiple second heat exchange channels 302 can be arranged sequentially along the first direction X, or along the second direction Y, or along both the first direction X and the second direction Y. In another example, the multiple second heat exchange channels 302 can be arranged around each other, for example, at least a portion of one second heat exchange channel 302 is arranged within the arrangement space enclosed by another second heat exchange channel 302.

[0117] For example, when in low temperature conditions, if the temperature of only the peripheral area of ​​the battery assembly 200 is lower than the preset temperature, water can be allowed to enter only the first heat exchange channel 301 to actively insulate the peripheral area of ​​the battery assembly 200, thereby reducing energy consumption.

[0118] When in a high-temperature heat dissipation condition, if the temperature of only part of the internal area of ​​the battery assembly 200 is higher than the preset temperature, water can be allowed to flow into the second heat exchange channel 302 of the corresponding area to actively cool the corresponding area of ​​the battery assembly 200 to reduce energy consumption.

[0119] In the above technical solution, a first heat exchange channel 301 extending along the periphery of the battery assembly 200 is provided for heat exchange with the periphery of the battery assembly 200. A second heat exchange channel 302 arranged inside the first heat exchange channel 301 is provided for heat exchange with the interior of the battery assembly 200. This allows independent water inflow and outflow from the first heat exchange channel 301 and the second heat exchange channel 302, thereby balancing the temperature difference between the periphery and the interior of the battery assembly 200 due to ambient heat dissipation. This improves the temperature uniformity of the battery assembly 200 and extends the service life of the battery device 1000. Furthermore, the thermal management efficiency of the battery assembly 200 can be improved, reducing energy consumption.

[0120] In some embodiments of the present application, the first heat exchange channel 301 bends and extends along the circumference of the battery assembly 200 to form a U-shape with one side open in the first direction X.

[0121] For example, a battery cavity and an electrical cavity are formed in the box body 100 and are arranged at intervals in the first direction X. The first heat exchange channel 301 is formed as a U-shaped structure that opens toward the electrical cavity in the first direction X. In this way, the inlet and outlet of the first heat exchange channel 301 can be conveniently connected to the external pipeline on the side where the electrical cavity is located.

[0122] In the above technical solution, the first heat exchange channel 301 is extended into a U shape, and the first heat exchange channel 301 can extend at least along three sides of the battery assembly 200, so that the first heat exchange channel 301 can exchange heat with more peripheral areas of the battery assembly 200, thereby improving the thermal management effect of the peripheral areas of the battery assembly 200, and also improving the temperature uniformity performance of the peripheral areas of the battery assembly 200.

[0123] In some embodiments of the present application, both ends of the U-shaped opening of the first heat exchange channel 301 extend beyond the periphery of the battery assembly 200 in the first direction X.

[0124] For example, the U-shaped opening of the first heat exchange channel 301 is arranged toward the electrical cavity, and both ends of the first heat exchange channel 301 can extend into the electrical cavity.

[0125] In the above technical solution, since both ends of the U-shaped opening of the first heat exchange channel 301 extend beyond the battery assembly 200, the two ends of the first heat exchange channel 301 extending beyond the battery assembly 200 can be used to perform thermal management for the electrical components in the electrical cavity, so that the electrical components in the electrical cavity operate within a suitable temperature range. At the same time, it can also be used to heat the beam structure provided between the electrical cavity and the battery cavity, such as an expansion beam, so that heat can be exchanged with the battery assembly 200 located at the opening position of the first heat exchange channel 301 through the beam structure, thereby realizing direct or indirect heat exchange between the first heat exchange channel 301 and the entire peripheral area of ​​the battery assembly 200, thereby improving the temperature uniformity of the entire peripheral area of ​​the battery assembly 200.

[0126] In some embodiments of the present application, the first heat exchange channel 301 includes multiple first flow channel sections 3011, and the first flow channel sections 3011 extend along the circumference of the battery assembly 200 into a U-shape with an opening on one side in the first direction X. The openings of the multiple first flow channel sections 3011 are oriented in the same direction, and the multiple first flow channel sections 3011 are connected in sequence and arranged inside and outside.

[0127] For example, the first heat exchange channel 301 may include two, three, four, five or more first channel segments 3011 , and any first channel segment 3011 is formed in a U-shape opening toward the electrical cavity.

[0128] As an example, the first flow channel section 3011 includes: a first section 30111, a second section 30112 and a third section 30113 connected in sequence, the first section 30111 and the third section 30113 both extend along the first direction X, and both extend from one end to the other end of the battery assembly 200, the second section 30112 extends along the second direction Y, and its two ends are respectively connected to the ends of the first section 30111 and the third section 30113 facing away from the electrical cavity.

[0129] Furthermore, the first section 30111 is arranged parallel to the third section 30113 , and the second section 30112 is arranged perpendicular to both the first section 30111 and the third section 30113 .

[0130] Furthermore, the first section 30111 is connected to the second section 30112 via a first bending portion 30114, which extends along a quarter-circle arc line; the second section 30112 is connected to the third section 30113 via a second bending portion 30115, which extends along a quarter-circle arc line.

[0131] Multiple first flow channel sections 3011 are arranged inside and outside, that is, multiple first flow channel sections 3011 are arranged in sequence along the peripheral side of the battery assembly 200 toward the center, and among two adjacent first flow channel sections 3011, the first flow channel section 3011 close to the center of the battery assembly 200 is arranged in the U-shaped area enclosed by the first flow section close to the peripheral edge of the battery assembly 200.

[0132] Multiple first flow channel sections 3011 are connected in sequence in the direction from the peripheral side toward the center of the battery assembly 200. Furthermore, two adjacent first flow channel sections 3011 are connected by a third bending portion 30116, wherein the third bending portion 30116 can protrude toward the direction of the electrical cavity and bend 180°.

[0133] In one example, the first heat exchange channel 301 further includes two first inlet and outlet sections 3012 , which are respectively connected to the outermost and innermost two first channel sections 3011 among the plurality of first channel sections 3011 .

[0134] Furthermore, the first entrance and exit section 3012 may include: a first extension portion 30121 and a second extension portion 30122, one end of the first extension portion 30121 is connected to one end of the first flow channel section 3011, and the other end of the first flow channel section 3011 can extend along the second direction Y toward the first center line of the battery assembly 200 parallel to the first direction X, the second extension portion 30122 is connected to the other end of the first extension portion 30121 and extends away from the first flow channel section 3011 along the first direction X, and the other end of the second extension portion 30122 is suitable for extending to be connected to the collector 33 of the thermal management component 300.

[0135] Furthermore, the first extension portion 30121 and the second extension portion 30122 are perpendicular to each other and are L-shaped, and the first extension portion 30121 and the second extension portion 30122 are connected through the fifth bending portion 30123, wherein the fifth bending portion 30123 extends along a quarter-circle arc line.

[0136] The two first access sections 3012 can be arranged on the same side of the first centerline of the battery assembly 200 and arranged in parallel. The two first access sections 3012 can also be arranged on either side of the first centerline of the battery assembly 200, with the second extensions 30122 of the two first access sections 3012 both arranged close to the first centerline of the battery assembly 200.

[0137] In the above technical solution, the first heat exchange channel 301 includes multiple U-shaped first channel sections 3011 connected in sequence and arranged inside and outside, which can increase the heat exchange area between the first heat exchange channel 301 and the peripheral area of ​​the battery assembly 200 and improve the heat exchange efficiency. At the same time, multiple first channel sections 3011 can improve the temperature uniformity of the peripheral area of ​​the battery assembly 200.

[0138] In some embodiments of the present application, the first flow channel section 3011 arranged near the peripheral side of the battery assembly 200 is connected to the upstream of the first flow channel section 3011 arranged near the second heat exchange channel 302 in the fluid flow direction.

[0139] Because the heat dissipation in the peripheral area of ​​the battery assembly 200 is relatively fast, especially under low-temperature heating conditions, when the first heat exchange channel 301 is used to exchange heat with the peripheral area of ​​the battery assembly 200, the heat exchange fluid first enters the first channel section 3011 near the periphery of the battery assembly 200, and then enters the second channel section arranged near the second heat exchange channel 302. In this way, the high-temperature heat exchange fluid can exchange heat with the outermost battery assembly 200 through the first channel section 3011 arranged near the periphery, and then exchange heat with the battery assembly 200 near the second heat exchange channel 302. This can improve the temperature difference between the inside and outside of the peripheral area of ​​the battery assembly 200, further improve the temperature uniformity of the peripheral area of ​​the battery assembly 200, and extend the service life of the battery device 1000.

[0140] In the above technical solution, since the first flow channel section 3011 arranged near the peripheral side of the battery assembly 200 is located upstream of the first flow channel section 3011 arranged near the second heat exchange flow channel section 302, the first flow channel section 3011 near the peripheral side of the battery assembly 200 can give priority to heat exchange with the outermost area of ​​the peripheral area of ​​the battery assembly 200, thereby further improving the internal and external temperature difference of the peripheral area of ​​the battery assembly 200 and improving the temperature uniformity.

[0141] In some embodiments of the present application, when the thermal management component 300 heats the battery assembly 200, the first flow channel section 3011 arranged near the peripheral side of the battery assembly 200 is connected to the upstream of the first flow channel section 3011 arranged near the second heat exchange channel 302 in the fluid flow direction; when the thermal management component 300 cools the battery assembly 200, the first flow channel section 3011 arranged near the peripheral side of the battery assembly 200 is connected to the downstream of the first flow channel section 3011 arranged near the second heat exchange channel 302 in the fluid flow direction.

[0142] Specifically, when heating the battery assembly 200, the temperature of the heat exchange fluid flowing in the heat exchange flow channel 30a is higher than the temperature of the battery assembly 200, and is used to heat and warm up the battery assembly 200. The high-temperature heat exchange fluid first flows into the first flow channel section 3011 close to the periphery of the battery assembly 200, and then flows into the first flow channel section 3011 close to the second heat exchange flow channel 302. The temperature of the heat exchange fluid in the outer first flow channel section 3011 is higher than the temperature of the heat exchange fluid in the inner first flow channel section 3011.

[0143] Since the high-temperature fluid first enters the outer first flow channel section 3011, the outer first flow channel section 3011 can first heat the outermost region of the battery assembly 200, and then the heat exchange fluid enters the inner first flow channel section 3011 to heat the inner part of the peripheral region of the battery assembly 200. Since the outermost region of the battery assembly 200 dissipates the most heat to the external environment, the higher-temperature heat exchange fluid can compensate for the heat loss of the outermost region to the external environment while raising the temperature of the outermost region of the battery assembly 200, meeting the heating needs. The inner part of the peripheral region of the battery assembly 200 has less contact area with the external environment and less heat loss, and the lower-temperature heat exchange fluid flowing in the inner first flow channel section 3011 can directly meet the heating needs, so that the temperature of the multiple parts arranged inside and outside the peripheral region of the battery assembly 200 is relatively consistent after heating and warming up, improving the uniformity of temperature distribution.

[0144] When cooling the battery assembly 200, the temperature of the heat exchange fluid flowing in the heat exchange flow channel 30a is lower than the temperature of the battery assembly 200, and is used to cool the battery assembly 200. The low-temperature heat exchange fluid first flows into the first flow channel section 3011 close to the second heat exchange flow channel 302, and then flows into the first flow channel section 3011 close to the periphery of the battery assembly 200. The temperature of the heat exchange fluid in the outer first flow channel section 3011 is higher than the temperature of the heat exchange fluid in the inner first flow channel section 3011.

[0145] Since the low-temperature fluid first enters the inner first flow channel section 3011, the inner first flow channel section 3011 can first heat the battery assembly 200 near the second heat exchange channel 302, and then the heat exchange fluid enters the outer first flow channel section 3011 to heat the outermost area of ​​the battery assembly 200. Since the portion of the battery assembly 200 near the second heat exchange channel 302 dissipates less heat to the environment, the lower temperature heat exchange fluid can better meet its heat dissipation needs. At the same time, since the outermost area of ​​the battery assembly 200 dissipates the most heat to the external environment, the slightly higher temperature heat exchange fluid can, together with the ambient heat dissipation, dissipate heat for the outermost area of ​​the battery assembly 200 to meet its heating needs. As a result, the temperatures of the multiple parts arranged inside and outside the peripheral area of ​​the battery assembly 200 are relatively consistent after cooling, thereby improving the uniformity of temperature distribution.

[0146] In the above technical solution, the temperature distribution uniformity of the peripheral area of ​​the battery assembly 200 under heating and cooling conditions can be improved, thereby improving the service life of the battery device 1000.

[0147] In some embodiments of the present application, the second heat exchange channel 302 bends and extends within the arrangement area 3010 .

[0148] For example, the second heat exchange channel 302 may extend back and forth in an S-shape or in a U-shape within the arrangement area 3010 .

[0149] In the above technical solution, since the second heat exchange channel 302 bends and extends within the layout area 3010, not only can the length of the second heat exchange channel 302 be extended, the heat exchange area of ​​the second heat exchange channel 302 be increased, and the heat exchange efficiency be improved, the second heat exchange channel 302 can also be distributed more evenly in the internal area of ​​the battery assembly 200, thereby improving the temperature uniformity of the internal area of ​​the battery assembly 200.

[0150] In some embodiments of the present application, the second heat exchange channel 302 includes multiple straight segments 3021 and at least one bent segment 3022, the multiple straight segments 3021 extend along the first direction X and are arranged at intervals in the second direction Y, and the multiple straight segments 3021 are connected in sequence through the bent segments 3022.

[0151] The second heat exchange channel 302 may include two, three, four, five, six, or more straight segments 3021. Furthermore, the plurality of straight segments 3021 may be arranged parallel to each other, and the bent segment 3022 may be convexly bent away from the straight segment 3021 along the first direction X, and the bending angle of the bent segment 3022 may be 180 degrees.

[0152] As an example, the second heat exchange channel 302 may be bent into an S-shape, an X-shape, a V-shape, or the like.

[0153] In one example, the second heat exchange channel 302 further includes a second entrance and exit section 3023 and a third entrance and exit section 3024. The second entrance and exit section 3023 and the third entrance and exit section 3024 are respectively connected to two straight segments 3021 located on opposite sides of the plurality of straight segments 3021 in the second direction Y. The second entrance and exit section 3023 and the third entrance and exit section 3024 are both located on the side of the second heat exchange channel 302 facing the electrical cavity. Furthermore, the second entrance and exit section 3023 and the third entrance and exit section 3024 both extend into the electrical cavity.

[0154] The structure of the second entrance and exit section 3023 is the same as that of the first entrance and exit section 3012 of the first heat exchange channel 301. The structure of the third entrance and exit section 3024 can be the same as that of the second entrance and exit section 3023, or the structure of the third entrance and exit section 3024 can be different from that of the second entrance and exit section 3023. For example, the third entrance and exit section 3024 can extend along a straight line in the first direction X and be collinear with the connected straight line section 3021.

[0155] In the above technical solution, since the second heat exchange channel 302 includes multiple straight segments 3021 and bent segments connecting adjacent straight segments 3021, the structure of the second heat exchange channel 302 can be simplified while increasing the length of the second heat exchange channel 302, increasing the heat exchange area, and improving the heat exchange efficiency. The second heat exchange channel 302 can be evenly extended in the internal area of ​​the battery assembly 200, thereby improving the temperature uniformity of the internal area of ​​the battery assembly 200.

[0156] In some embodiments of the present application, the heat management component 300 includes a plurality of bent and extended heat exchange tubes 31 , and a heat exchange channel 30 a is defined on the inner side of each heat exchange tube 31 .

[0157] As an example, the heat exchange tube 31 may be a circular tube, a flat tube, or the like.

[0158] As an example, the heat exchange tube 31 can be formed by bending a single tube. Furthermore, the heat exchange tube 31 can be bent and extended into a U-shape, S-shape, or U-shape, etc. This can reduce the number of welds in the thermal management component 300 and reduce the risk of leakage in the thermal management component 300. Furthermore, the process of bending a single tube is simpler than the process of manufacturing a plate-like structure, significantly reducing the cost of the thermal management component 300.

[0159] In the above technical solution, the heat management component 300 includes a plurality of bent and extended heat exchange tubes 31. Compared with the plate-like structure, the heat exchange tubes 31 have a simple structure, are easy to process, and have low cost.

[0160] In some embodiments of the present application, a separation rib is provided in the heat exchange tube 31 , and the separation rib extends along the extension direction of the heat exchange tube 31 and divides the heat exchange channel 30a in the heat exchange tube 31 into multiple sub-channels.

[0161] For example, the heat exchange tube 31 is a harmonica tube.

[0162] In the above technical solution, the provision of separator ribs within heat exchange tube 31 increases the heat transfer area of ​​heat exchange tube 31, improves the heat transfer efficiency of heat exchange tube 31, and enhances the thermal management effect of battery device 1000. Furthermore, the provision of separator ribs can also enhance the structural strength of heat exchange tube 31 and extend the service life of thermal management component 300.

[0163] In some embodiments of the present application, the thermal management component 300 includes a plurality of control valves 32 , which correspond one-to-one to the plurality of heat exchange channels 30 a , and the control valves 32 are connected in series with the corresponding heat exchange channels 30 a .

[0164] That is, the thermal management component 300 further includes a control valve 32. There are multiple control valves 32, each corresponding to each of the multiple heat exchange channels 30a. The control valves 32 are used to control the on / off state of the corresponding heat exchange channels 30a. The control valves 32 can be connected in series at the inlet of the corresponding heat exchange channel 30a, upstream of the inlet of the heat exchange channel 30a, at the outlet of the heat exchange channel 30a, downstream of the outlet of the heat exchange channel 30a, or in series with the heat exchange channel 30a to achieve real-time control over the on / off state of the heat exchange channel 30a.

[0165] In addition, the control valve 32 can also be used to control and adjust the flow rate of the heat exchange fluid in the corresponding heat exchange channel 30a.

[0166] Since each heat exchange channel 30a is connected in series with a corresponding control valve 32, the flow rate of the heat exchange fluid in the corresponding heat exchange channel 30a can be controlled by controlling the opening and closing of the control valve 32 and adjusting the opening of the control valve 32, thereby controlling the heat exchange amount between the heat exchange channel 30a and the corresponding area, realizing zoning control of multiple areas of the battery assembly 200, improving the thermal management efficiency of the battery assembly 200, and reducing energy consumption.

[0167] In the above technical solution, since the control valve 32 corresponds to the heat exchange channel 30a and is connected in series with the corresponding heat exchange channel 30a, the water inlet and outlet of the corresponding heat exchange channel 30a can be easily controlled independently, the structure is simplified, and the control is simple and convenient.

[0168] In some embodiments of the present application, the control valve 32 is serially connected to the upstream side of the inlet of the corresponding heat exchange channel 30a.

[0169] When the heat exchange fluid flows, the heat exchange fluid first passes through the control valve 32 and then enters the heat exchange flow channel 30a through the inlet of the heat exchange flow channel 30a.

[0170] In the above technical solution, since the control valve 32 is connected in series to the upstream side of the inlet of the heat exchange channel 30a, there is enough space to arrange the control valve 32. It is also convenient for the control valve 32 to control the heat exchange fluid flowing into the heat exchange channel 30a from the external pipeline, and it is more convenient to maintain and manage the control valve 32.

[0171] In some embodiments of the present application, the control valve 32 is a normally open valve.

[0172] A normally open valve is one that is in the open state when there is no external control signal and will only operate when the flow needs to be adjusted or closed.

[0173] In the above technical solution, since control valve 32 is configured as a normally open valve, it ensures that the heat exchange fluid can flow freely without the need for additional control, thereby maintaining basic thermal management efficiency for battery assembly 200 and reducing unnecessary control system complexity. Furthermore, if an abnormality occurs in battery device 1000, the normally open control valve 32 ensures that the fluid can flow smoothly into heat exchange channel 30a to exchange heat for battery assembly 200, reducing the probability of thermal runaway in battery device 1000.

[0174] In some embodiments of the present application, the thermal management component 300 further includes a current collector 33 . The current collector 33 defines a plurality of liquid inlet cavities. The plurality of liquid inlet cavities correspond to and are connected with the inlets of the plurality of heat exchange channels 30 a one-to-one.

[0175] When the battery device 1000 is in operation, the heat exchange fluid first enters the multiple liquid inlet cavities respectively, and then flows into the corresponding heat exchange flow channel 30a through the liquid inlet cavities.

[0176] In the above technical solution, since the collector 33 has multiple liquid inlet cavities corresponding to and connected to multiple heat exchange channels 30a, the heat exchange fluid can easily enter the heat exchange channel 30a through the corresponding liquid inlet cavities, thereby improving the control efficiency of the heat exchange fluid.

[0177] In some embodiments of the present application, the thermal management component 300 further includes a plurality of liquid inlet pipes 34 , which are all connected to the fluid collector 33 and correspond one-to-one to and communicate with the plurality of liquid inlet cavities. The control valve 32 is connected in series to the liquid inlet pipes 34 .

[0178] The number of the liquid inlet pipes 34 can be two, three, four or more. The multiple liquid inlet pipes 34 correspond one to one with the multiple liquid inlet cavities.

[0179] In one example, the current collecting body 331 has multiple liquid inlet cavities, and multiple liquid inlet interfaces are formed on the current collecting body 331. The multiple liquid inlet interfaces correspond one-to-one to and are connected with the multiple liquid inlet cavities. The multiple liquid inlet interfaces are all used to connect the liquid inlet pipe 34, wherein the liquid inlet pipe 34 and the peripheral edge of the liquid inlet interface can be snap-connected, welded, adhesively connected or connected by fasteners.

[0180] In one example, the liquid inlet pipe 34 includes a pipe section and a joint section, wherein the joint section is a 90° pipe joint, one end of the joint section is inserted into the liquid inlet interface, the pipe section is connected to the other end of the joint section, and the pipe section is a straight pipe.

[0181] In one example, the control valve 32 is connected between the other end of the connector segment and the connecting pipe segment. Furthermore, the control valve 32 has a first valve port and a second valve port that are arranged opposite each other. The control valve 32 is plug-connected to the other end of the connector segment via the first valve port, and is plug-connected to one end of the connecting pipe segment via the second valve port.

[0182] In the above technical solution, since multiple liquid inlet pipes 34 correspond one-to-one to and are connected to multiple liquid inlet cavities, the control valve 32 is connected in series to the corresponding liquid inlet pipe 34. In this way, the flow rate at the inlet of the heat exchange channel 30a can be conveniently controlled, and the control valve 32 can also be conveniently connected and arranged, making it convenient to maintain the control valve 32.

[0183] In some embodiments of the present application, the collector 33 is also formed with a liquid outlet cavity, wherein the number of the liquid outlet cavity is one, and the outlets of multiple heat exchange channels 30a are all connected to the liquid outlet cavity; or, the number of the liquid outlet cavity is multiple, and the multiple liquid outlet cavities correspond one-to-one to and are connected to the outlets of multiple heat exchange channels 30a.

[0184] In one example, there is one liquid outlet cavity, and the outlets of the plurality of heat exchange channels 30 a are all connected to the liquid outlet cavity. In this way, the structure of the current collector 33 is simplified and the cost is reduced.

[0185] In another example, there are multiple liquid outlet cavities, and the multiple liquid outlet cavities, multiple liquid inlet cavities and multiple heat exchange channels 30a correspond to each other and are connected. In this way, each heat exchange channel 30a has a corresponding and uniquely connected liquid inlet cavity and liquid outlet cavity. In this way, the mutual influence between the heat exchange fluids at the outlets of the multiple heat exchange channels 30a can be reduced.

[0186] In the above technical solution, by providing a single liquid outlet cavity, the outlets of the multiple heat exchange channels 30a are all connected to the liquid outlet cavity, which simplifies the structure of the current collector 33 and reduces costs. By providing multiple liquid outlet cavities and ensuring that the outlets of the multiple heat exchange channels 30a correspond to and connect with the multiple liquid outlet cavities one by one, the mutual influence between the outlets of the multiple heat exchange channels 30a can be reduced.

[0187] In some embodiments of the present application, the current collector 33 comprises a current collector body 331, end covers 332, and partitions 333. The current collector body 331 is tubular in the second direction Y, and the cross section of the current collector 33 can be rectangular. The two ends of the current collector body 331 in the second direction Y are open. The end covers 332 are two and cover the two open ends of the current collector body 331 respectively. The partitions 333 are arranged in the current collector body 331. The number of the partitions 333 is multiple. The multiple partitions 333 are arranged in the second direction Y at intervals. The multiple partitions 333 divide the space in the current collector body 331 into multiple liquid inlet chambers and at least one liquid outlet chamber. The multiple liquid inlet chambers correspond to the multiple heat exchange channels 30a one by one and are in communication.

[0188] Further, the current collector body 331 is provided with a bushing penetrating the current collector body 331 in the thickness direction. The partitions 333 can be inserted into the current collector body 331 from the position of the bushing, and the partitions 333 are sealingly connected with the periphery of the bushing, for example, the partitions 333 are connected with the periphery of the bushing by welding.

[0189] In the above technical solution, the current collector 33 has a simple structure and is convenient to process, and can effectively divide multiple liquid inlet chambers and liquid outlet chambers.

[0190] In some embodiments of the present application, the thermal management member 300 further comprises a liquid outlet connecting pipe 35. The liquid outlet connecting pipe 35 is connected with the current collector 33 and corresponds to the liquid outlet chamber one by one and is in communication.

[0191] In one example, the current collector body 331 is provided with a liquid outlet interface. The liquid outlet interface is in communication with the liquid outlet chamber. The liquid outlet connecting pipe 35 is sealingly connected at the position of the liquid outlet interface. The liquid outlet connecting pipe 35 and the periphery of the liquid outlet interface can be connected by clamping, welding, bonding, or through fasteners.

[0192] In one example, the structure of the liquid outlet connecting pipe 35 can be the same as that of the liquid inlet connecting pipe 34.

[0193] In the above technical solution, by providing the liquid outlet connecting pipe 35, the external pipeline can be conveniently connected.

[0194] In some embodiments of the present application, the battery device 1000 further comprises multiple temperature sensors. The temperature sensors are arranged on the battery assembly 200 at intervals. The temperature sensors are electrically connected with the control valve 32.

[0195] The number of the temperature sensors can be four, five, eight, ten, fifteen, twenty, and the like.

[0196] It should be noted that the plurality of temperature sensors are configured to cover and detect temperature values of all the highest temperature regions and all the lowest temperature regions of the battery assembly 200. In addition, the number of temperature sensors can be determined according to the number of battery monomers of the battery assembly 200 and the cost comprehensive consideration.

[0197] The plurality of temperature sensors are arranged on the battery assembly 200, which can improve the uniformity of the arrangement of the temperature sensors on the battery assembly 200, and achieve more comprehensive temperature monitoring of the battery assembly 200.

[0198] The temperature sensors are electrically connected to the control valves 32, for example, the temperature sensors can be directly electrically connected to the control valves 32, and the temperature sensors can also be indirectly electrically connected to the control valves 32, specifically, the temperature sensors and the control valves 32 can be electrically connected to the battery management system. In this way, the control valves 32 can be controlled according to the temperature values detected by the temperature sensors, for adjusting the flow of the heat exchange fluid of the heat exchange flow channel 30a corresponding to the control valve 32, so as to realize accurate temperature control of each region of the battery assembly 200 corresponding to each heat exchange flow channel 30a, improve the thermal management efficiency, and improve the temperature uniformity of the battery assembly 200.

[0199] For example, when the temperature value detected by one or more temperature sensors is lower than the first preset temperature, the control valve 32 corresponding to the heat exchange flow channel 30a at the region position can be opened, and the high-temperature fluid is used to heat the temperature region of the battery assembly 200.

[0200] The first preset temperature is greater than the preset lower limit temperature of the battery assembly 200. In an example, the preset lower limit temperature can be greater than or equal to -10°C and less than or equal to 10°C, further, the preset lower limit temperature can be greater than or equal to -5°C and less than or equal to 5°C. Still further, the preset lower limit temperature can be 0°C.

[0201] In an example, the difference between the first preset temperature and the preset lower limit temperature is greater than or equal to 1°C and less than or equal to 5°C.

[0202] For another example, when the temperature value detected by one or more temperature sensors is higher than the second preset temperature, the control valve 32 corresponding to the heat exchange flow channel 30a at the region position can be opened, and the low-temperature fluid is used to cool the region of the battery assembly 200.

[0203] The second preset temperature is less than the preset upper limit temperature of the battery assembly 200. And the difference between the second preset temperature and the preset upper limit temperature is greater than or equal to 1°C and less than or equal to 5°C. For example, the difference between the second preset temperature and the preset upper limit temperature is 3°C.

[0204] For another example, when the temperature sensors of two different regions of the battery assembly 200 detect that the difference between the temperature values is greater than the preset difference value, if the battery device 1000 is in a low-temperature working condition, the control valve 32 of the heat exchange flow channel 30a corresponding to the region with a lower temperature value is opened, and the high-temperature fluid enters the heat exchange flow channel 30a of the region through the control valve 32, for heating the region of the battery assembly 200. If the battery device 1000 is in a high-temperature working condition, the control valve 32 of the heat exchange flow channel 30a corresponding to the region with a higher temperature value is opened, and the low-temperature fluid enters the heat exchange flow channel 30a of the region through the control valve 32, for cooling the battery assembly 200 of the region.

[0205] The preset difference value can be greater than or equal to 2°C and less than or equal to 10°C, for example, the preset difference value is 5°C.

[0206] In the above technical solution, since the plurality of temperature sensors are electrically connected with the plurality of control valves 32, the flow of the heat exchange fluid of the heat exchange flow channel 30a corresponding to the control valve 32 can be adjusted according to the temperature value detected by each temperature sensor, so that the accurate temperature control of each region of the battery assembly 200 corresponding to each heat exchange flow channel 30a is realized, the thermal management efficiency is improved, and the temperature uniformity of the battery assembly 200 is improved.

[0207] In some embodiments of the present application, the battery assembly 200 includes a plurality of battery monomer assemblies 210, the plurality of battery monomer assemblies 210 are arranged along the first direction X and / or the second direction Y, each battery monomer assembly 210 includes at least one battery monomer, and each battery monomer assembly 210 is provided with at least one temperature sensor.

[0208] The battery assembly 200 can include two, four, six, eight, twelve or more battery monomer assemblies 210, the plurality of battery monomer assemblies 210 can be arranged in sequence along the first direction X and the second direction Y, each battery monomer assembly 210 can include one or more battery monomers, for example, one battery monomer assembly 210 can include one, four, eight, ten or twenty battery monomers, and when the battery monomer assembly 210 includes a plurality of battery monomers, the plurality of battery monomers are arranged in a stacked manner along the thickness direction of the battery monomer.

[0209] One, two, five, eight or ten or more temperature sensors can be arranged on each battery monomer assembly 210. Further, the number of battery monomers in one battery monomer assembly 210 is greater than or equal to the number of temperature sensors.

[0210] In one example, the battery monomer assembly 210 of the present application is a battery module.

[0211] In the technical solution, at least one temperature sensor is arranged in each battery monomer assembly 210, so that the temperature of each battery monomer assembly 210 can be detected in real time, and the thermal management of each battery monomer assembly 210 is facilitated, and the battery monomer assembly 210 is ensured to operate in a suitable temperature range.

[0212] In some embodiments of the present application, the thermal management member 300 is arranged in the box 100 and located between the battery assembly 200 and the bottom wall or the top wall of the box 100.

[0213] For example, the thermal management member 300 can be arranged only between the battery assembly 200 and the bottom wall of the box 100, or only between the top wall of the box 100 and the battery assembly 200, or arranged between the battery assembly 200 and the bottom wall and the top wall of the box 100.

[0214] In the technical solution, the thermal management member 300 is arranged between the battery assembly 200 and the top wall and / or the bottom wall of the box 100, so that the plurality of heat exchange channels 30a of the thermal management member 300 can exchange heat with all the battery monomers of the battery assembly 200, the thermal management efficiency is improved, the space utilization in the battery device 1000 is improved, and the structure is compact. In addition, the thermal management member 300 can directly exchange heat with the battery assembly 200, the heat exchange efficiency is improved, and the heat loss is reduced.

[0215] In a second aspect, the embodiments of the present application also provide a power utilization device 1 comprising the battery device 1000 of any of the above-mentioned embodiments.

[0216] In the technical solution, the power utilization device 1 is provided with the battery device 1000, and each heat exchange channel 30a of the thermal management member 300 of the battery device 1000 is connected in series with a corresponding control valve 32, the first heat exchange channel 301 extends along the circumference of the battery assembly 200 and encloses the arrangement area 3010, and the second heat exchange channel 302 is arranged in the arrangement area 3010. In this way, the first heat exchange channel 301 and the second heat exchange channel 302 can be independently controlled by the control valve 32, and the temperature control of the circumferential area and the internal area of the battery assembly 200 is realized. Therefore, not only the thermal management efficiency of the battery assembly 200 can be improved, and the energy consumption can be reduced, but also the temperature difference between the circumferential area and the internal area of the battery assembly 200 due to environmental heat dissipation can be balanced, the temperature uniformity of the battery assembly 200 is improved, and the service life of the battery device 1000 is improved, so that the overall performance of the power utilization device 1 is improved.

[0217] The battery device 1000 according to one specific embodiment of the present application will be described below with reference to the accompanying drawings. Figures 2-6 The battery device 1000 according to one specific embodiment of the present application will be described below with reference to the accompanying drawings.

[0218] Referring to Figure 2The battery device 1000 includes a box body 100, a battery assembly 200 and a thermal management component 300, wherein the box body 100 includes a box body 110 and a cover plate 120, the box body 110 defines a accommodating cavity 101 with an open top, and the accommodating cavity 101 is divided into a battery cavity and an electrical cavity arranged in a first direction X, the cover plate 120 is sealed on the top of the box body 110, the battery assembly 200 is arranged in the battery cavity, and the thermal management component 300 is arranged in the box body 100 and is located between the battery assembly 200 and the bottom wall of the box body 100.

[0219] like Figure 2 and Figure 3 As shown, the battery assembly 200 includes twelve battery cell assemblies 210. The twelve battery cell assemblies 210 are arranged in three rows along a first direction X, with each row including four battery cell assemblies 210 arranged along a second direction Y. Each battery cell assembly 210 is equipped with at least one temperature sensor. Each temperature sensor is electrically connected to the battery management system.

[0220] like Figures 3-6 As shown, the thermal management component 300 includes two heat exchange tubes 31, a fluid collector 33, two liquid inlet pipes 34, a liquid outlet pipe 35, and two control valves 32. The two heat exchange tubes 31 are bent and extended, and the fluid collector 33 defines two liquid inlet cavities and one liquid outlet cavity. The inlet and outlet ends of the two heat exchange tubes 31, the two liquid inlet pipes 34, and the liquid outlet pipe 35 are all connected to the fluid collector 33. The two liquid inlet pipes 34 are connected to the inlet ends of the two heat exchange tubes 31 through the two liquid inlet cavities, respectively, and the outlet ends of the two heat exchange tubes 31 are connected to the liquid outlet pipe 35 through the liquid outlet cavity.

[0221] The two control valves 32 are connected in series to the two liquid inlet pipes 34, and both control valves 32 are normally open valves. Both control valves 32 are electrically connected to the battery management system.

[0222] The two heat exchange tubes 31 are respectively a first heat exchange tube 31 and a second heat exchange tube 31 . The first heat exchange tube 31 defines a first heat exchange channel 301 , and the second heat exchange tube 31 defines a second heat exchange channel 302 .

[0223] like Figure 3 As shown, the first heat exchange channel 301 extends along the circumference of the battery assembly 200 and is in a U-shape opening toward the electrical cavity, enclosing an arrangement area 3010 , and the second heat exchange channel 302 is arranged in the arrangement area 3010 enclosed by the first heat exchange channel 301 .

[0224] The first heat exchange channel 301 includes two first channel sections 3011 and two first inlet and outlet sections 3012. Both first channel sections 3011 are U-shaped and open toward the electrical chamber. One first channel section 3011 is arranged within the U-shaped area enclosed by the other first channel section 3011. One end of the two first channel sections 3011 is connected, and the other ends are respectively connected to the two first inlet and outlet sections 3012. The first channel section 3011 includes a first section 30111, a second section 30112, and a third section 30113. The first section 30111 and the third section 30113 extend along the first direction X and are spaced apart in the second direction Y. The second section 30112 is connected to the first section 30111 and the third section 30113 at the end facing away from the electrical chamber. The first section 30111, the second section 30112, and the third section 30113 are all connected by arc-shaped bends. The ends of the two third sections 30113 facing the electrical cavity both extend beyond the edge of the battery assembly 200 facing the electrical cavity and are connected via the third bend 30116 .

[0225] Both first entrance and exit sections 3012 are arranged on the same side of the first centerline of the battery assembly 200, which is parallel to the first direction X. The first entrance and exit section 3012 includes a first extension portion 30121 and a second extension portion 30122. The first extension portion 30121 is connected to the first section 30111 of the first flow channel section 3011 and extends toward the first centerline of the battery assembly 200 along the second direction Y. The second extension portion 30122 is connected to the other end of the first extension portion 30121 and extends away from the battery assembly 200 along the first direction X. The first extension portion 30121 and the second extension portion 30122 are connected by a circular arc-shaped fifth bend portion 30123. The first extension portion 30121 and the first section 30111 are connected by a circular arc-shaped fourth bend portion 3013.

[0226] The second heat exchange channel 302 includes four straight segments 3021, three curved segments 3022, a second entrance and exit segment 3023, and a third entrance and exit segment 3024. The multiple straight segments 3021 extend along the first direction X and are evenly spaced in the second direction Y. The multiple straight segments 3021 are sequentially connected by curved segments in the second direction Y. The second entrance and exit segment 3023 is connected to the end of the straight segment 3021 closest to the first segment 30111 of the first heat exchange channel 301, facing the electrical cavity. The structure of the second entrance and exit segment 3023 is identical to that of the first entrance and exit segment 3012. The third entrance and exit segment 3024 is connected to the end of the straight segment 3021 closest to the third segment 30113 of the first heat exchange channel 301, facing the electrical cavity, and extends straight along the first direction X, away from the straight segment 3021.

[0227] The current collector is arranged in the electrical cavity, and the two first inlet and outlet sections 3012, the second inlet and outlet section 3023 and the third inlet and outlet section 3024 all extend into the electrical cavity and are connected to the current collector 33. Specifically, the ends of the first sections 30111 of the two first flow channel sections 3011 facing the electrical cavity both extend beyond the edge of the battery assembly 200 along the first direction X. The two first inlet and outlet sections 3012 are both arranged on the outside of the battery assembly 200, the first extension portion 30121 of the second inlet and outlet section 3023 is in contact with the surface of the battery assembly 200, and the second extension portion 30122 of the second inlet and outlet section 3023 extends out of the edge of the battery assembly 200 facing the electrical cavity.

[0228] Furthermore, the first section 30111 , the third section 30113 and the straight section 3021 are all longitudinal tube portions of the heat exchange channel 30 a , wherein each battery cell assembly 210 is in contact with at least two longitudinal tube portions for heat exchange.

[0229] When the battery device 1000 is in a low-temperature insulation condition, the temperature of the surrounding area of ​​the battery assembly 200 drops rapidly. At this time, the heating function of the thermal management component 300 can be turned on and the control valve 32 corresponding to the second heat exchange channel 302 can be closed. At this time, the temperature of the battery assembly 200 in the surrounding area will increase.

[0230] Specifically, the preset lower limit temperature of the battery assembly 200 is set to T0. Under low-temperature conditions, when the lowest temperature of the area surrounding the battery assembly 200 is less than or equal to the first preset temperature T1, the control valve 32 corresponding to the first heat exchange channel 301 can be opened to heat the area surrounding the battery assembly 200 through the first heat exchange channel 301, where T0 and T1 satisfy the following conditions: T1 = T0 + a, 1°C ≤ a ≤ 5°C. When the temperature of the area surrounding the battery assembly 200 exceeds T0 + 5°C, the control valve 32 corresponding to the first heat exchange channel 301 is closed.

[0231] Under low-temperature operating conditions, when the lowest temperature of the inner area of ​​the battery assembly 200 is less than or equal to the first preset temperature T1, the control valve 32 corresponding to the second heat exchange channel 302 can be opened to heat the inner area of ​​the battery assembly 200 through the second heat exchange channel 302, where T0 and T1 satisfy the following conditions: T1 = T0 + a, 1°C ≤ a ≤ 5°C. When the temperature of the inner area of ​​the battery assembly 200 exceeds T0 + 5°C, the control valve 32 corresponding to the second heat exchange channel 302 is closed.

[0232] Under low-temperature conditions, when the temperature of the surrounding area of ​​the battery assembly 200 is lower than the temperature of the inner area by at least a preset difference, where the preset difference is 5°C, the control valve 32 corresponding to the first heat exchange channel 301 can be opened to heat the surrounding area of ​​the battery assembly 200 through the first heat exchange channel 301, thereby reducing the temperature difference between the surrounding area and the inner area of ​​the battery assembly 200.

[0233] The preset upper limit temperature of the battery assembly 200 is T2, and in the cooling mode, when the maximum temperature of the circumferential side region of the battery assembly 200 is less than or equal to the second preset temperature T3, the control valve 32 corresponding to the first heat exchange channel 301 can be opened, and the circumferential side region of the battery assembly 200 is cooled through the first heat exchange channel 301, wherein T2 and T3 satisfy: T3 = T2-b, 1℃≤b≤5℃, for example, b = 3℃.

[0234] In the cooling mode, when the maximum temperature of the inner side region of the battery assembly 200 is less than or equal to the second preset temperature T3, the control valve 32 corresponding to the second heat exchange channel 302 can be opened, and the inner side region of the battery assembly 200 is cooled through the second heat exchange channel 302, T2 and T3 satisfy: T3 = T2-b, 1℃≤b≤5℃.

[0235] In the cooling mode, when the temperature of the inner side region of the battery assembly 200 is higher than the temperature of the circumferential side region by not less than a preset difference, wherein the preset difference is equal to 5℃. The control valve 32 corresponding to the second heat exchange channel 302 can be opened, and the inner side region of the battery assembly 200 is cooled through the second heat exchange channel 302, so as to reduce the temperature difference between the circumferential side region and the inner side region of the battery assembly 200.

[0236] In the above embodiments, the battery device 1000 can intelligently adjust the temperature of different regions in the battery device 1000 according to the temperature difference between the inner and outer regions of the battery assembly 200, so as to achieve the highest thermal management efficiency; wherein in the heat preservation mode, the thermal management can be started in the circumferential side region of the battery assembly 200, so as to achieve low-energy-consumption active heat preservation; and the battery life is improved.

[0237] Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present application, and 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: it can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacement to 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 description 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 in the text, but includes all technical solutions falling within the scope of the claims.

Claims

1. A battery device (1000), characterized in that: include: Box (100); A battery assembly (200), the battery assembly (200) being disposed in the box (100); A heat management component (300), the heat management component (300) being used for heat exchange with the battery assembly (200), the heat management component (300) having a plurality of heat exchange channels (30a), the plurality of heat exchange channels (30a) being arranged in sequence from the outside to the inside, and the internal heat exchange channels (30a) being located within the region of the external heat exchange channels (30a); At least two of the plurality of heat exchange channels (30a) are configured as independent water inlet and outlet settings.

2. The battery device (1000) according to claim 1, characterized in that The plurality of heat exchange channels (30a) include a first heat exchange channel (301) and a second heat exchange channel (302), wherein the first heat exchange channel (301) bends and extends along the circumference of the battery assembly (200) and encloses an arrangement area (3010), and the second heat exchange channel (302) is arranged in the arrangement area (3010) enclosed by the first heat exchange channel (301).

3. The battery device (1000) according to claim 2, characterized in that The first heat exchange channel (301) is bent and extended along the circumference of the battery assembly (200) to form a U-shape with one side open in a first direction (X).

4. The battery device (1000) according to claim 3, characterized in that Both ends of the U-shaped opening of the first heat exchange channel (301) extend beyond the periphery of the battery assembly (200) in the first direction (X).

5. The battery device (1000) according to claim 3, characterized in that The first heat exchange channel (301) includes a plurality of first channel sections (3011), each of the first channel sections (3011) extending along the circumference of the battery assembly (200) into a U-shape with an opening on one side in a first direction (X), the openings of the plurality of first channel sections (3011) facing the same direction, and the plurality of first channel sections (3011) being connected in sequence and arranged inside and outside.

6. The battery device (1000) according to claim 5, characterized in that The first flow channel section (3011) arranged near the peripheral side of the battery assembly (200) is connected upstream of the first flow channel section (3011) arranged near the second heat exchange flow channel (302) in the fluid flow direction; or When the thermal management component (300) heats the battery assembly (200), the first flow channel section (3011) arranged near the peripheral side of the battery assembly (200) is connected to the upstream of the first flow channel section (3011) arranged near the second heat exchange channel (302) in the fluid flow direction; when the thermal management component (300) cools the battery assembly (200), the first flow channel section (3011) arranged near the peripheral side of the battery assembly (200) is connected to the downstream of the first flow channel section (3011) arranged near the second heat exchange channel (302) in the fluid flow direction.

7. The battery device (1000) according to claim 2, characterized in that The second heat exchange channel (302) bends and extends within the arrangement area (3010).

8. The battery device (1000) according to claim 7, characterized in that The second heat exchange channel (302) comprises a plurality of straight segments (3021) and at least one bent segment (3022), wherein the plurality of straight segments (3021) extend along a first direction (X) and are arranged at intervals in a second direction (Y), and the plurality of straight segments (3021) are sequentially connected via the bent segments (3022).

9. The battery device (1000) according to claim 1, characterized in that The heat management component (300) comprises a plurality of bent and extended heat exchange tubes (31), and the inner side of each heat exchange tube (31) defines a heat exchange flow channel (30a).

10. The battery device (1000) according to claim 9, characterized in that A separation rib is provided in the heat exchange tube (31), and the separation rib extends along the extension direction of the heat exchange tube (31) and separates the heat exchange flow channel (30a) in the heat exchange tube (31) into a plurality of sub-flow channels.

11. The battery device (1000) according to any one of claims 1 to 10, characterized in that: The thermal management component (300) includes a plurality of control valves (32), the plurality of control valves (32) corresponding one to one with the plurality of heat exchange channels (30a), and the control valves (32) are connected in series with the corresponding heat exchange channels (30a).

12. The battery device (1000) according to claim 11, characterized in that The control valve (32) is connected in series to the upstream side of the inlet of the corresponding heat exchange flow channel (30a).

13. The battery device (1000) according to claim 11, characterized in that The control valve (32) is a normally open valve.

14. The battery device (1000) according to claim 11, characterized in that The thermal management component (300) further comprises a current collector (33), wherein the current collector (33) defines a plurality of liquid inlet cavities, and the plurality of liquid inlet cavities correspond to and are in communication with the inlets of the plurality of heat exchange channels (30a).

15. The battery device (1000) according to claim 14, characterized in that The thermal management component (300) further comprises a plurality of liquid inlet pipes (34), each of the plurality of liquid inlet pipes (34) being connected to the fluid collector (33) and corresponding to and communicating with the plurality of liquid inlet cavities one by one, and the control valve (32) being connected in series to the liquid inlet pipes (34).

16. The battery device (1000) according to claim 15, characterized in that The current collector (33) is also formed with a liquid outlet cavity. There is one liquid outlet cavity, and the outlets of the plurality of heat exchange channels (30a) are all connected to the liquid outlet cavity; or there are multiple liquid outlet cavities, and the plurality of liquid outlet cavities correspond one-to-one to and are connected to the outlets of the plurality of heat exchange channels (30a).

17. The battery device (1000) according to claim 11, characterized in that Also includes: A plurality of temperature sensors are arranged at intervals on the battery assembly (200), and the temperature sensors are electrically connected to the control valve (32).

18. The battery device (1000) according to claim 17, characterized in that The battery assembly (200) comprises a plurality of battery cell assemblies (210), wherein the plurality of battery cell assemblies (210) are arranged along a first direction (X) and / or a second direction (Y), each of the battery cell assemblies (210) comprises at least one battery cell, and each of the battery cell assemblies (210) is provided with at least one temperature sensor.

19. The battery device (1000) according to claim 1, characterized in that The heat management component (300) is disposed in the box (100) and is located between the battery assembly (200) and the bottom wall and / or top wall of the box (100).

20. An electrical device (1), characterized in that: A battery device (1000) comprising any one of claims 1-19.

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