Heat exchange plate, heat management system, battery pack, energy storage system and power utilization device

Abstract

The utility model discloses a heat exchange plate, heat management system, battery pack, energy storage system and electric device, the heat exchange plate includes: plate body and heating element, plate body includes: first plate body and second plate body that splice in the first direction, first plate body and / or second plate body are provided with the open slot that faces each other and splice into the heat exchange runner, and the first plate body and / or second plate body are provided with the open slot and splice into the heat exchange runner. The heat exchange flow channel is suitable for containing a cooling medium, and in the first direction, the opening size of the opening groove in the direction away from the first plate body is gradually reduced; the heating piece is arranged in the heat exchange runner; wherein the cooling medium is suitable for flowing in the heat exchange flow channel and exchanging heat with the plate body, the heating piece is suitable for heating the plate body in the heat exchange flow channel, and at least one surface of the plate body forms a heat exchange surface. Therefore, the process difficulty of the heat exchange plate can be reduced, the machining cost of the heat exchange plate can be reduced, the installation precision of the heating piece can be improved, the fixing stability of the heating piece can be improved, and the temperature adjusting effect of the heat exchange plate can be kept stable.

Description

Technical Field

[0001] The utility model relates to the technical field of batteries, and in particular to a heat exchange plate, a thermal management system, a battery pack, an energy storage system and an electrical device. Background Art

[0002] In the related art, the heat exchange plate can contact the battery cell and cool the battery cell, and a heating film is set on the side of the battery cell to heat it. That is, the battery cell is cooled and heated by the heat exchange plate and the heating film respectively. However, the heating efficiency of the heating film is low, and it is easy to age and fall off, and the heating film has a safety hazard.

[0003] Furthermore, in the prior art, a technical solution has been proposed to arrange a heating element on a heat exchange plate. Although it can improve the heating efficiency and reduce safety hazards, a certain amount of cavity needs to be reserved on the heat exchange plate itself as a heat exchange flow channel, and further arranging a heating element has high requirements on the position of the cavity, greater process difficulty, higher cost, and the assembly difficulty of the heating element on the heat exchange plate is relatively high. Utility Model Content

[0004] The utility model aims to solve at least one of the technical problems existing in the prior art. To this end, one purpose of the utility model is to provide a heat exchange plate, which can realize cooling and heating functions, has low processing difficulty and low cost, and the assembly of the heating element is simpler and more convenient.

[0005] The utility model also proposes a thermal management system adopting the heat exchange plate.

[0006] The utility model further proposes a battery pack having the above thermal management system.

[0007] The utility model further proposes an energy storage system using the battery pack.

[0008] The utility model further proposes an electric device using the battery pack.

[0009] In a first aspect, the utility model provides a heat exchange plate, comprising: a plate body and a heating element, the plate body comprising: a first plate body and a second plate body spliced ​​together in a first direction, the first plate body and / or the second plate body are provided with open grooves facing each other and spliced ​​together to form a heat exchange channel, the heat exchange channel is suitable for accommodating a cooling medium, and in the first direction, the opening size of the open groove gradually decreases in the direction away from the first plate body; the heating element is arranged in the heat exchange channel; wherein the cooling medium is suitable for flowing in the heat exchange channel and exchanging heat with the plate body, the heating element is suitable for heating the plate body in the heat exchange channel, and at least one surface of the plate body is formed as a heat exchange surface.

[0010] According to the heat exchange plate of the embodiment of the utility model, on the one hand, by arranging a heating element in the heat exchange flow channel, there is no need to separately open a mounting groove structure for mounting the heating element on the plate body, thereby reducing the process difficulty of the heat exchange plate and reducing the processing cost of the heat exchange plate; on the other hand, by arranging an open groove with a tapered groove structure, not only can the assembly guide of the heating element be achieved and the installation accuracy of the heating element be improved, but also the positioning of the heating element can be achieved, the fixing stability of the heating element can be improved, and the movement of the heating element can be reduced, so that the temperature regulation effect of the heat exchange plate can be kept stable.

[0011] According to some embodiments of the present utility model, in the first direction, the cross-sectional profile of the heat exchange channel is trapezoidal.

[0012] In the above technical solution, on the one hand, the cross-sectional profile of the heat exchange channel is trapezoidal, which can reduce the processing difficulty and make the plate structure more stable and reliable after stamping. On the other hand, the plane where the short side is located can be flatter, so that the fixation of the heating element is more stable and reliable.

[0013] According to some embodiments of the present invention, the heating element is disposed on the second plate body, and is located at an end of the opening slot having a smaller opening size.

[0014] In the above technical solution, the difficulty of assembly can be reduced, and the positioning of the heating element can be achieved. At the same time, the plane where the short side of the trapezoid is located is relatively flat, and the fixing stability of the heating element is higher.

[0015] According to some embodiments of the present invention, the plate body has two first surfaces opposite to each other in a first direction, two second surfaces opposite to each other in a second direction, and two third surfaces opposite to each other in a third direction, and at least one of the first surface, the second surface and the third surface is formed as a heat exchange surface, and the first direction, the second direction and the third direction are orthogonal to each other.

[0016] In the above technical solution, at least one of the multiple surfaces can be used as a heat exchange surface to cool the components that need to be cooled according to usage requirements. Alternatively, based on different temperature regulation requirements, components with greater temperature regulation requirements can be set on the first surface, and components with smaller temperature regulation requirements can be set on the second and third surfaces, so as to achieve temperature regulation of more components through one heat exchange plate.

[0017] According to some embodiments of the utility model, the plate body is provided with a cooling medium outlet and a cooling medium inlet connected to the heat exchange flow channel, and the cooling medium inlet and the cooling medium outlet are both formed on the same first surface, or the same second surface, or the same third surface.

[0018] In the above technical solution, by setting a cooling medium inlet and a cooling medium outlet, the cooling medium can be circulated in the heat exchange channel to achieve circulating cooling of the plate body and improve the cooling efficiency and cooling effect. The cooling medium inlet and the cooling medium outlet are arranged on the same surface, which can reduce the difficulty of arranging the cooling medium supply pipeline outside the heat exchange plate, and the internal heat exchange channel can be arranged in a surrounding manner or in parallel so that the cooling medium inlet and the cooling medium outlet are located on the same surface. The number and total area of ​​the heat exchange channel can also be increased, thereby improving the heat exchange efficiency.

[0019] According to some embodiments of the utility model, the board body is further provided with a first via hole and a second via hole for electrically connecting the heating element, and the first via hole and the second via hole are formed on the same first surface, or the same second surface, or the same third surface.

[0020] In the above technical solution, by setting the first via hole and the second via hole, electrical conduction of the heating element can be achieved to ensure that the plate body is heated in time when heating is required, thereby improving the heating efficiency and heating effect. By setting the first via hole and the second via hole on the same surface, the difficulty of arranging the electrical connection harness of the heating element outside the heat exchange plate can be reduced.

[0021] According to some embodiments of the present invention, the cooling medium outlet, the cooling medium inlet, the first via hole, and the second via hole are formed on the same first surface, or the same second surface, or the same third surface.

[0022] In the above technical solution, the external cooling medium supply pipeline of the heat exchange plate and the power supply harness of the heating element can be arranged on the same side of the heat exchange plate, which can improve the space occupation of the heat exchange plate and make the arrangement of related components of the heat exchange plate more compact.

[0023] According to some embodiments of the present invention, a first connector is provided on the first via hole, and a second connector is provided on the second via hole. The first connector is electrically connected to the positive pole of the heating element, and the second connector is electrically connected to the negative pole of the heating element.

[0024] In the above technical solution, the first connector and the second connector can be electrically connected to the external power supply harness by plugging and unplugging, so that the heating element and the external power supply harness can be quickly disconnected by plugging and unplugging, which can reduce the difficulty of electrical connection of the heating element, improve the safety and reliability of the heating element, and make the power on and off control of the heating element simpler and more convenient.

[0025] According to some embodiments of the present utility model, the heat exchange flow channel includes a plurality of sub-flow channels connected in parallel, and the plurality of sub-flow channels are connected to the outside through a converging flow channel.

[0026] In the above technical solution, by providing a plurality of sub-flow channels, the temperature difference between different heat exchange areas of the heat exchange plate can be smaller and the heat exchange uniformity can be better.

[0027] According to some embodiments of the present invention, the heating element is arranged around the plurality of sub-flow channels.

[0028] In the above technical solution, the heating element can be arranged around the sub-channel so that the heating element can fully heat the plate body and the cooling medium, thereby improving the heating effect and heating efficiency. At the same time, the heating element can be symmetrically structured in the second direction or the third direction (based on the arrangement of the heat exchange channel) to make the heating uniformity of the heating element better.

[0029] According to some embodiments of the present invention, the heating element is configured as a positive temperature coefficient thermistor.

[0030] In the above technical solution, the higher the temperature of the heating element, the greater the resistance. When the temperature is too high, the resistance of the heating element rises to a larger value. At this time, the heating element is equivalent to a short circuit, and overheating protection can be achieved to achieve overheating safety protection for the heat exchange plate and improve the safety of the heat exchange plate.

[0031] According to some embodiments of the present invention, an insulating layer is coated on the outer surface of the heating element.

[0032] In the above technical solution, insulation protection of the heating element can be achieved, reducing the probability of leakage and short circuit of the heating element, thereby reducing safety hazards and improving safety.

[0033] According to some embodiments of the present invention, the heating element is configured as a plate-shaped structure.

[0034] In the above technical solution, the heating element is flat, and the bonding area between the heating element with a planar structure and the bottom wall or top wall of the open groove is larger, the fixing stability of the heating element is higher, and the heating element occupies less space in the heat exchange flow channel, and has a smaller impact on the flow resistance. The influence of the heating element on the flow rate of the cooling medium can be reduced to improve the temperature regulation effect of the heat exchange plate.

[0035] According to some embodiments of the present invention, a heat-conducting structural adhesive is provided between the heating element and the plate body.

[0036] In the above technical solution, the thermally conductive structural adhesive is arranged at least corresponding to the first heat exchange part and the second heat exchange part. The thermally conductive structural adhesive is connected to the heating element on one side in the first direction, and is connected to the second plate on the other side in the first direction. This can not only improve the fixing stability and reliability of the heating element, but also fill the gaps on the heating element and the second plate with the thermally conductive structural adhesive, so that the indirect contact between the heating element and the second plate is more sufficient, thereby improving the heating efficiency and the heating uniformity.

[0037] In a second aspect, the utility model provides a thermal management system, including: at least one heat exchange plate as described in the above embodiment.

[0038] In a third aspect, the utility model provides a battery pack, including: the thermal management system described in the above embodiment.

[0039] In a fourth aspect, the utility model provides an energy storage system, including: the battery pack described in the above embodiment.

[0040] In a fifth aspect, the utility model provides an electrical device, comprising: the battery pack described in the above embodiment.

[0041] Additional aspects and advantages of the present invention will be given in part in the following description, and in part will become apparent from the following description, or will be learned through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0042] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0043] Figure 1 is a schematic diagram of an electrical device according to an embodiment of the utility model;

[0044] Figure 2 is a schematic diagram of a battery pack according to an embodiment of the utility model;

[0045] Figure 3 is an exploded schematic diagram of a heat exchange plate according to an embodiment of the utility model;

[0046] Figure 4 is a three-dimensional schematic diagram of a heat exchange plate according to an embodiment of the utility model;

[0047] Figure 5 is a schematic diagram of a first plate body according to an embodiment of the utility model;

[0048] Figure 6 is a schematic diagram of a second plate according to an embodiment of the utility model;

[0049] Figure 7 is a schematic diagram of a heating element, a first connector and a second connector according to an embodiment of the utility model;

[0050] Figure 8 is a cross-sectional schematic diagram of a heat exchange plate according to an embodiment of the utility model;

[0051] Fig. 9 It is a schematic cross-sectional view of a plate body according to an embodiment of the utility model.

[0052] Reference numerals:

[0053] Heat exchange plate 100,

[0054] Plate body 10, first plate body 11, second plate body 12, heat exchange channel 13, sub-channel 131, converging channel 132, cooling medium inlet 14, cooling medium outlet 15, first through hole 16, second through hole 17,

[0055] Heating element 20, first heating portion 21, second heating portion 22, extension portion 23,

[0056] First connector 30, second connector 40, thermal conductive structural adhesive 50,

[0057] Battery cell 200,

[0058] Battery pack 300, power device 400, controller 500, motor 600, box 700,

[0059] First surface a, second surface b, third surface c. DETAILED DESCRIPTION

[0060] In order to make the purpose, technical solution and advantages of the embodiment of the utility model clearer, the technical solution in the embodiment of the utility model will be clearly described below in conjunction with the drawings in the embodiment of the utility model. Obviously, the described embodiment is a part of the embodiment of the utility model, not all of the embodiments. Based on the embodiment of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0061] Unless otherwise defined, all technical and scientific terms used in the present invention have the same meanings as those generally understood by technicians in the technical field of the present invention; the terms used in the present invention and in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention; the terms "including" and "having" and any variations thereof in the specification and claims of the present invention and the above-mentioned drawings are intended to cover non-exclusive inclusions. The terms "first", "second", etc. in the specification and claims of the present invention or the above-mentioned drawings are used to distinguish different objects, rather than to describe a specific order or a primary and secondary relationship.

[0062] The reference to "embodiment" in the present invention means that the specific features, structures or characteristics described in conjunction with the embodiment may be included in at least one embodiment of the present invention. The appearance of the phrase in various places in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments.

[0063] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection", "connection", and "attachment" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be the internal communication of two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0064] The term "and / or" in the present invention is only a description of the association relationship of the associated objects, indicating that there can be three relationships. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in the present invention generally indicates that the associated objects before and after are in an "or" relationship.

[0065] In the embodiments of the present invention, the same reference numerals represent the same components, and for the sake of brevity, detailed descriptions of the same components are omitted in different embodiments. It should be understood that the thickness, length, width and other dimensions of various components in the embodiments of the present invention shown in the drawings, as well as the overall thickness, length, width and other dimensions of the integrated device are only exemplary and should not constitute any limitation on the present invention.

[0066] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0067] In the description of the present invention, a first feature being “above” or “below” a second feature may include that the first and second features are directly in contact with each other, or may include that the first and second features are not in direct contact but are in contact with each other via another feature therebetween.

[0068] In the description of the present invention, a first feature “above”, “over” and “above” a second feature includes the first feature being directly above and obliquely above the second feature, or simply means that the first feature is horizontally higher than the second feature.

[0069] The term "plurality" used in the present invention refers to more than two (including two).

[0070] In the embodiment of the utility model, the heat exchange plate 100 can be used for cooling and heating the battery cell 200. The battery cell 200 will generate a large amount of heat during the charging and discharging process. In some severely cold usage environments, such as the usage scenario in the north in winter, the ambient temperature is low, which will cause the activation energy of the electrolyte inside the battery cell 200 to decrease, and the efficiency of the battery cell 200 to decrease. By providing the heat exchange plate 100, the temperature of the battery cell 200 can be adjusted by the heat exchange plate 100 to avoid excessive heat during the charging and discharging process of the battery cell 200, thereby improving the safety of the battery cell 200. In cold usage scenarios, the heat exchange plate 100 can also heat the battery cell 200 to improve the efficiency of the battery cell 200 in a low temperature environment, reduce the attenuation of the energy storage capacity of the battery cell 200 in a cold environment, and improve the usage experience.

[0071] The battery cell 200 may be a secondary battery. A secondary battery refers to a battery cell 200 that can be continuously used by activating active materials by charging after the battery cell 200 is discharged.

[0072] The battery cell 200 can be a lithium ion battery, a sodium ion battery, a sodium lithium ion battery, a lithium metal battery, a sodium metal battery, a lithium sulfur battery, a magnesium ion battery, a nickel hydrogen battery, a nickel cadmium battery, a lead storage battery, etc., which is not limited in the embodiments of the present invention.

[0073] The battery pack 300 mentioned in the embodiment of the present invention refers to a single physical module including one or more battery cells 200 to provide higher voltage and capacity. When there are multiple battery cells 200, the multiple battery cells 200 are connected in series, in parallel or in mixed connection through a busbar.

[0074] In some embodiments, a plurality of battery cells 200 may be combined into a battery module, that is, when there are a plurality of battery cells 200, the plurality of battery cells 200 are arranged and fixed to form a battery module.

[0075] In some embodiments, the battery pack 300 includes a case 700 and battery cells 200, at least one battery cell 200 or at least one battery module is accommodated in the case 700, and the case 700 has an accommodating space, and at least one battery cell 200 or at least one battery module is accommodated in the accommodating space.

[0076] In some embodiments, the box 700 can be used as a part of the chassis structure of the vehicle. For example, part of the box 700 can become at least a part of the floor of the vehicle, or part of the box 700 can become at least a part of the cross beam and longitudinal beam of the vehicle.

[0077] In some embodiments, the battery pack 300 or the battery module may be part of an energy storage system, which may be an energy storage container, an energy storage cabinet, etc., in which batteries and energy shut-off modules are integrated.

[0078] The development of battery technology must take into account many design factors at the same time, such as energy density, cycle life, discharge capacity, charge and discharge rate and other performance parameters. In addition, the safety performance of the battery must also be considered.

[0079] It is understandable that since the energy people need is highly temporal and spatial, in order to rationally use energy and improve energy utilization, it is necessary to use a medium or device to store one form of energy in the same form or convert it into another form of energy, and then release it in a specific form of energy based on future application needs. As we all know, to achieve the goal of carbon neutrality, green energy is currently mainly used to replace fossil energy to achieve the purpose of generating green electricity.

[0080] The current green energy mainly includes solar energy, wind energy, hydropower, etc. However, solar energy and wind energy generally have problems of strong intermittency and large volatility, which will cause unstable voltage of the green power grid (not enough electricity during peak hours and too much electricity during low hours). Unstable voltage will cause damage to electricity. Therefore, it may cause the problem of "wind and solar power abandonment" due to insufficient electricity demand or insufficient grid acceptance capacity.

[0081] To solve the problem of insufficient electricity demand or insufficient grid acceptance capacity, we must rely on energy storage systems, etc. That is, the energy storage system converts electrical energy into other forms of energy through physical or chemical means and stores it, and then converts the energy stored in the energy storage system into electrical energy when needed. In simple terms, the energy storage system is similar to a large "power bank", which stores electrical energy when there is sufficient light energy and wind energy, and releases the stored electrical energy when needed.

[0082] At present, energy storage (i.e. energy storage) has a wide range of application scenarios, including power generation side energy storage, grid side energy storage, renewable energy grid-connected energy storage and user side energy storage. The corresponding types of energy storage systems include:

[0083] (1) Large energy storage containers used in grid-side energy storage scenarios can serve as high-quality active and reactive power regulation power sources in the grid, achieve load matching of electric energy in time and space, enhance the ability to absorb renewable energy, and are of great significance in grid system backup, relieving peak load power supply pressure, and peak and frequency regulation;

[0084] (2) The main operating mode of small and medium-sized energy storage cabinets used in industrial and commercial energy storage scenarios (banks, shopping malls, etc.) on the user side and small household energy storage boxes used in home energy storage scenarios on the user side is "peak shaving and valley filling". Since there is a large price difference in electricity charges at peak and valley locations according to electricity demand, after users have energy storage equipment, in order to reduce costs, they usually charge the energy storage cabinets / boxes during the low electricity price period; during the peak electricity price period, the electricity in the energy storage equipment is discharged for use to achieve the purpose of saving electricity bills. In addition, in remote areas and areas prone to natural disasters such as earthquakes and hurricanes, the existence of household energy storage systems is equivalent to users providing themselves and the power grid with backup power, eliminating the inconvenience caused by frequent power outages due to disasters or other reasons.

[0085] In combination with the above-mentioned situation of storing energy by physical or electrochemical means, taking electrochemical energy storage as an example, the energy storage system may include at least one of the above-mentioned batteries, using the chemical elements in the battery as energy storage media, so as to realize the charging and discharging process through the chemical reaction or change of the energy storage medium. In simple terms, the electric energy generated by light energy and wind energy is stored in at least one battery through the chemical reaction or change of the energy storage medium, and when the use of external electric energy reaches a peak, the electric energy stored in at least one battery is released for use through the chemical reaction or change of the energy storage medium, or transferred to a place where the electric energy is scarce for use.

[0086] In summary, the battery cell 200 serves as the smallest energy unit of the battery module, battery pack 300, and energy storage system. The battery module or battery pack 300 includes multiple battery cells 200. The battery cell 200 includes a large battery surface defined by the width edge and length edge of the battery cell 200, a small battery surface defined by the width edge and height edge, and a battery end surface defined by the length edge and width edge. The battery cell 200 will generate a lot of heat during the charging and discharging process, and the concentrated heat may lead to thermal runaway. It is necessary to set a heat exchange plate to cool the battery cell 200 in a targeted manner. In order to enable the battery cell 200 to be used in a cold environment, a thermal film can be attached to the surface of the battery cell 200.

[0087] However, the heating film is attached to the small surface of the battery cell, with a small heating area, low heating efficiency, and easy aging and falling off. The heating film is attached to the end face of the battery, which poses a risk of dry burning and tearing, posing a safety hazard.

[0088] In the prior art, a technical solution has been further proposed to integrate the heating element on the heat exchange plate, that is, a mounting groove is provided on the side of the heat exchange plate facing the battery cell, and the heating element is embedded in the mounting groove, so that the heat exchange plate can integrate the heating function. Compared with the technical solution in which the heating film is provided on the small surface of the battery, the heating efficiency is higher. Compared with the technical solution in which the heating film is provided on the large surface of the battery, there is no need to provide a heating film, and safety hazards can also be reduced.

[0089] However, the plate structure of the heat exchanger plate is relatively complex, and more cavities need to be opened inside the heat exchanger plate to accommodate the cooling medium. The number of cavities is large, and it is difficult to open installation grooves at appropriate positions on the heat exchanger plate. In addition, when opening installation grooves on the outer surface of the heat exchanger plate, the installation grooves need to be offset from the cavities, and the position accuracy of the installation grooves is required to be high, resulting in great process difficulty and high processing costs.

[0090] In view of this, an embodiment of the utility model provides a heat exchange plate, which, under the premise of taking into account the heating efficiency of the battery cell, on the one hand, arranges a heating element in the heat exchange flow channel (i.e., the cavity), and there is no need to separately open a mounting groove structure on the outer surface of the heat exchange plate, which can reduce the process alone to reduce the processing cost; on the other hand, the opening groove defining the heat exchange flow channel gradually decreases in size in the direction away from the first plate body, which can not only realize the assembly guidance during the transfer of the heating element, improve the assembly accuracy, and reduce the assembly difficulty, but also the tapered structure can realize the limitation of the heating element, avoid the movement of the heating element, so as to ensure that the temperature regulation effect of the heat exchange plate remains stable.

[0091] The technical solution described in the embodiment of the present utility model is applicable to the battery pack 300 and the electric device 400 using the battery pack 300 .

[0092] The power-consuming device 400 may be a vehicle, a mobile phone, a portable device, a laptop computer, a ship, a spacecraft, an electric toy, an electric tool, etc. The vehicle may be a fuel vehicle, a gas vehicle, or a new energy vehicle, and the new energy vehicle may be a pure electric vehicle, a hybrid vehicle, or an extended-range vehicle, etc.; the spacecraft includes an airplane, a rocket, a space shuttle, and a spacecraft, etc.; the electric toy includes a fixed or mobile electric toy, such as a game console, an electric car toy, an electric ship toy, and an electric airplane toy, etc.; the electric tool includes a metal cutting electric tool, a grinding electric tool, an assembly electric tool, and an electric tool for railways, such as an electric drill, an electric grinder, an electric wrench, an electric screwdriver, an electric hammer, an impact drill, a concrete vibrator, and an electric planer, etc. The embodiment of the utility model does not impose any special restrictions on the above-mentioned power-consuming device 400.

[0093] For the convenience of description, the following embodiments are described by taking the electric device 400 as a vehicle as an example.

[0094] Please refer to the figure, Figure 1The schematic diagram of the structure of the vehicle provided by some embodiments of the utility model. The interior of the vehicle is provided with a battery pack 300, and the battery pack 300 can be arranged at the bottom, head or tail of the vehicle. The battery pack 300 can be used for power supply of the vehicle, for example, the battery pack 300 can be used as the operating power supply of the vehicle.

[0095] The vehicle may further include a controller 500 and a motor 600 . The controller 500 is used to control the battery pack 300 to supply power to the motor 600 . The motor 600 serves as a load, for example, to meet the power requirements for starting, navigating and driving the vehicle.

[0096] In some embodiments of the present invention, the battery pack 300 can be used not only as an operating power source for the vehicle, but also as a driving power source for the vehicle, replacing or partially replacing fuel or natural gas to provide driving power for the vehicle.

[0097] Please refer to the figure, Figure 2 The exploded view of the battery pack 300 provided in some embodiments of the present invention. The battery pack 300 includes a battery module and a box 700, and the box 700 is used to accommodate the battery module.

[0098] Among them, the box 700 is a component for accommodating the battery module, and the box 700 provides a placement space for multiple battery cells 200 in the battery module. The box 700 can adopt a variety of structures. In some embodiments, the box 700 may include a tray and a box 700, and the tray and the box 700 cover each other to define a placement space for accommodating the battery cells 200. The tray and the box 700 can be in various shapes, such as a cuboid, a cylinder, etc. The tray can be a hollow structure with one side open, and the box 700 can also be a hollow structure with one side open. The open side of the box 700 covers the open side of the tray, so as to form a box 700 with a placement space. It can also be that the tray is a hollow structure with one side open, the box 700 is a plate-like structure, and the box 700 covers the open side of the tray, so as to form a box 700 with a placement space. As an example, the battery cell 200 can be a cylindrical battery cell, a prismatic battery cell, a soft-pack battery cell or a battery cell of other shapes, and the utility model has no special restrictions.

[0099] In the battery pack 300, there can be one or more battery cells 200. If there are more than one battery cell 200, the battery cells 200 can be connected in series, in parallel, or in a mixed connection. A mixed connection means that the battery cells 200 are both connected in series and in parallel. A battery module can be formed by connecting a plurality of battery cells 200 in series, in parallel, or in a mixed connection, and then a plurality of battery modules are connected in series, in parallel, or in a mixed connection to form a whole, and accommodated in the box 700. Alternatively, all battery cells 200 can be directly connected in series, in parallel, or in a mixed connection, and then the whole formed by all battery cells 200 is accommodated in the box 700.

[0100] Reference below Figure 1-Figure 9 The heat exchange plate 100, the thermal management system, the battery pack, the energy storage system and the electric device 400 according to the embodiment of the present invention are described.

[0101] First, as Figure 3 and Figure 4 As shown, the utility model provides a heat exchange plate 100, comprising: a plate body 10 and a heating element 20, the plate body 10 comprising: a first plate body 11 and a second plate body 12 assembled in a first direction, the first plate body 11 and / or the second plate body 12 are provided with opening grooves facing each other and assembled to form a heat exchange channel 13, the heat exchange channel 13 is suitable for accommodating a cooling medium, in the first direction, the opening size of the opening groove gradually decreases in the direction away from the first plate body 11, and the heating element 20 is arranged in the heat exchange channel 13.

[0102] It should be pointed out that the first direction of the embodiment of the utility model can be a height direction, a length direction or a width direction in a horizontal plane, etc., and the specific direction in the three-dimensional space is obtained based on the setting position of the heat exchange plate 100. Relatively speaking, the first direction is the thickness direction of the heat exchange plate 100. In the thickness direction, the first plate body 11 and the second plate body 12 are combined to form a heat exchange channel 13, so that the heat exchange channel 13 can extend along the length direction and the width direction of the heat exchange plate 100. The area for heat exchange between the heat exchange channel 13 and the first plate body 11 and the second plate body 12 can be larger, the heat exchange efficiency is higher, and the heat exchange effect is better.

[0103] Specifically, the first plate body 11 and the second plate body 12 are assembled in the first direction to form a heat exchange channel 13, in which a cooling medium can be accommodated, and the heating element 20 is arranged in the heat exchange channel 13, so that the cooling medium is suitable for flowing in the heat exchange channel 13 and exchanging heat with the plate body 10, and the heating element 20 is suitable for heating the plate body 10 in the heat exchange channel 13, so that at least one surface of the plate body 10 is formed as a heat exchange surface.

[0104] It should be pointed out that the heat exchange in the embodiment of the utility model includes cooling and heating. By cooling the plate body 10, indirect cooling and cooling of the parts in contact with the plate body 10 can be achieved, and by heating the plate body 10, indirect heating of the parts in contact with the plate body 10 can be achieved. The heating of the plate body 10 by the heating element 20 can include the heating of the plate body 10 directly by the heating element 20 and the heating of the cooling medium by the heating element 20, and the cooling medium indirectly heats the plate body 10.

[0105] Among them, the opening grooves facing each other on the first plate body 11 and / or the second plate body 12 mean that the first plate body 11 has a first surface facing the second plate body 12, and the second plate body 12 has a second surface facing the first plate body 11. The opening grooves can be set only on the first surface, and the opening grooves and the second surface are combined to form the heat exchange channel 13. The opening grooves can also be set only on the second surface, and the opening grooves and the first surface are combined to form the heat exchange channel 13. The opening grooves can also be set on both the first surface and the second surface, and the two opening grooves are combined to form the heat exchange channel 13.

[0106] In some embodiments, the opening groove can be formed only on the first plate body 11 or only on the second plate body 12, that is, the first surface is a plane or the second surface is a plane. During the processing, only the first plate body 11 or the second plate body 12 needs to be stamped, and the other plate body 10 does not need to be stamped, which can also simplify the processing steps and reduce the processing cost.

[0107] It can be understood that the opening groove is constructed as a tapered groove, and the opening size gradually decreases in the direction away from the first plate body 11. The heating element 20 is arranged in the heat exchange channel 13, that is, located in the opening groove. The installation guidance of the heating element 20 can be achieved through the tapered groove structure with a gradually decreasing opening, thereby reducing the installation difficulty of the heating element 20, improving the assembly efficiency and assembly accuracy, and the assembled heating element 20 can be stably fixed in the heat exchange channel 13 under the limiting effect of the tapered groove. In the process of cooling through the heat exchange plate 100, the turbulence of the heating element 20 can be reduced to keep the cooling effect stable. When heating, the cooling medium can be kept stationary, so as to achieve rapid heating of the plate body 10 by directly heating the plate body 10 and heating the cooling medium in the plate body 10, thereby improving the heating efficiency.

[0108] According to the heat exchange plate 100 of the embodiment of the utility model, on the one hand, by arranging the heating element 20 in the heat exchange flow channel 13, there is no need to separately open a mounting groove structure for mounting the heating element 20 on the plate body 10, so that the process difficulty of the heat exchange plate 100 can be reduced to reduce the processing cost of the heat exchange plate 100; on the other hand, by arranging the open groove of the tapered groove structure, not only the assembly guide of the heating element 20 can be achieved and the installation accuracy of the heating element 20 can be improved, but also the positioning of the heating element 20 can be achieved, the fixing stability of the heating element 20 can be improved, and the movement of the heating element 20 can be reduced, so that the temperature regulation effect of the heat exchange plate 100 can be kept stable.

[0109] like Figure 8 and Fig. 9 As shown, according to some embodiments of the present invention, in the first direction, the cross-sectional profile of the heat exchange channel 13 is a trapezoid, and the long side of the trapezoid is defined by the first plate body 11 , and the short side of the trapezoid is defined by the second plate body 12 .

[0110] Exemplarily, the first direction is the height direction, the first plate body 11 is arranged above the second plate body 12, and the first plate body 11 is arranged opposite to the second plate body 12, the long side (long bottom) of the trapezoid is formed on the top wall of the first surface or the opening groove on the first surface, and the short side (short bottom) of the trapezoid is formed on the bottom wall of the second surface or the opening groove on the second surface.

[0111] Therefore, on the one hand, the cross-sectional profile of the heat exchange channel 13 is a trapezoid, which can reduce the processing difficulty and make the structure of the plate body 10 more stable and reliable after stamping. On the other hand, the plane where the short side is located can be flatter, so that the fixation of the heating element 20 is more stable and reliable.

[0112] like Figure 8 As shown, according to some embodiments of the present invention, the heating element 20 is disposed on the second plate 12 and is located at the end of the opening groove with a smaller opening size, that is, on the short side of the trapezoid.

[0113] Specifically, the short side is formed on the second plate 12, and the second plate 12 can be located at the top or at the bottom, and the heating element 20 is fixed on the short side. At least one inclined surface is formed between the short side and the long side, and the inclined surface is formed as a guide inclined surface, which can reduce the difficulty of assembly and achieve the limitation of the heating element 20. At the same time, the plane where the short side of the trapezoid is located is relatively flat, and the fixing stability of the heating element 20 is higher.

[0114] like Figure 4 As shown, according to some embodiments of the present invention, the plate body 10 has two first surfaces a opposite to each other in a first direction, two second surfaces b opposite to each other in a second direction, and two third surfaces c opposite to each other in a third direction, at least one of the first surface a, the second surface b and the third surface c is formed as a heat exchange surface, and the first direction, the second direction and the third direction are orthogonal to each other.

[0115] That is to say, in a specific embodiment in which the first direction is the height direction, the first surface a is the top and bottom surfaces of the plate body 10, the second surface b is the two opposite side surfaces of the plate body 10, and the third surface c is the other two opposite side surfaces of the plate body 10. The heating element 20 can heat the plate body 10 so that the temperatures of the first surface a, the second surface b and the third surface c are all higher than the ambient temperature, and the cooling medium can make the temperatures of the first surface a, the second surface b and the third surface c lower than the ambient temperature.

[0116] Therefore, according to the use requirements, at least one of the multiple surfaces can be used as a heat exchange surface to cool the components that need to be cooled. Based on different temperature regulation requirements, the components with greater temperature regulation requirements can be set on the first surface a, and the components with smaller temperature regulation requirements can be set on the second surface b and the third surface c, so as to achieve temperature regulation of more components through one heat exchange plate 100.

[0117] like Figure 5 As shown, according to some embodiments of the utility model, a cooling medium outlet 15 and a cooling medium inlet 14 connected to the heat exchange channel 13 are provided on the plate body 10, and the cooling medium inlet 14 and the cooling medium outlet 15 are both formed on the same first surface a, or the same second surface b, or the same third surface c.

[0118] exist Figure 4 and 5 In the illustrated embodiment, the cooling medium inlet 14 and the cooling medium outlet 15 are both located on the first surface a.

[0119] Therefore, by setting the cooling medium inlet 14 and the cooling medium outlet 15, the cooling medium can be circulated in the heat exchange channel 13 to achieve circulation cooling of the plate body 10, thereby improving the cooling efficiency and cooling effect. The cooling medium inlet 14 and the cooling medium outlet 15 are arranged on the same surface, which can reduce the difficulty of arranging the cooling medium supply pipeline outside the heat exchange plate 100, and the internal heat exchange channel 13 can be arranged in a surrounding manner or in parallel so that the cooling medium inlet 14 and the cooling medium outlet 15 are located on the same surface, which can also increase the number and total area of ​​the heat exchange channel 13, thereby improving the heat exchange efficiency.

[0120] See also Figure 5 As shown, according to some embodiments of the present invention, the board body 10 is further provided with a first via 16 and a second via 17 for electrically connecting the heating element 20, and the first via 16 and the second via 17 are both formed on the same first surface a, or the same second surface b, or the same third surface c.

[0121] Therefore, by setting the first via 16 and the second via 17, the electrical conduction of the heating element 20 can be achieved to ensure that the plate body 10 is heated in time when heating is required, thereby improving the heating efficiency and heating effect. By setting the first via 16 and the second via 17 on the same surface, the difficulty of arranging the electrical connection harness of the heating element 20 outside the heat exchange plate 100 can be reduced.

[0122] Combination Figure 3 and Figure 5 As shown, according to some embodiments of the present invention, the cooling medium outlet 15, the cooling medium inlet 14, the first via hole 16, and the second via hole 17 are formed on the same first surface a, or the same second surface b, or the same third surface c.

[0123] In this way, the external cooling medium supply pipeline of the heat exchange plate 100 and the power supply harness of the heating element 20 can be arranged on the same side of the heat exchange plate 100, which can improve the space occupation of the heat exchange plate 100 and make the arrangement of related components of the heat exchange plate 100 more compact.

[0124] According to some embodiments of the present invention, a first connector 30 is provided on the first via hole 16 , and a second connector 40 is provided on the second via hole 17 . The first connector 30 is electrically connected to the positive pole of the heating element 20 , and the second connector 40 is electrically connected to the negative pole of the heating element 20 .

[0125] Specifically, the positive pole of the heating element 20 and the first connector 30 can be fixed by welding, plugging, screwing, etc., and correspondingly, the negative pole of the heating element 20 and the second connector 40 can be fixed by welding, plugging, screwing, etc., and the first connector 30 and the second connector 40 can be electrically connected to the external power supply harness by plugging and unplugging, so that the heating element 20 and the external power supply harness can be quickly disconnected by plugging and unplugging, which can reduce the difficulty of electrical connection of the heating element 20, improve the safety and reliability of the heating element 20, and make the power on and off control of the heating element 20 simpler and more convenient.

[0126] Combination Figure 6 , Figure 8 and Fig. 9 As shown, according to some embodiments of the present invention, the heat exchange channel 13 includes a plurality of sub-channels 131 connected in parallel, and the plurality of sub-channels 131 are connected to the outside through a converging channel 132 .

[0127] It should be pointed out that the parallel connection of the multiple sub-channels 131 means that the fluid pressure of the cooling medium in the multiple sub-channels 131 is consistent, and the cooling medium can enter and be discharged from the multiple sub-channels 131 at the same time.

[0128] Exemplarily, there can be multiple sub-channels 131, and a first converging channel is provided at one end of the same side of the multiple sub-channels 131, and a second converging channel is provided at the other end of the same side of the multiple sub-channels 131. The first converging channel is connected to the cooling medium inlet 14, and the second converging channel is connected to the cooling medium outlet 15, so that the cooling medium can enter the multiple sub-channels 131 from the first converging channel, and after completing sufficient heat exchange in the sub-channels 131, it flows out through the second converging channel.

[0129] In this way, by providing a plurality of sub-flow channels 131, the temperature difference between different heat exchange areas of the heat exchange plate 100 can be smaller, and the heat exchange uniformity can be better.

[0130] Combination Figure 3 , Figure 6 and Figure 7 As shown, according to some embodiments of the present invention, the heating element 20 is disposed around the plurality of sub-channels 131 .

[0131] That is to say, the heating element 20 includes a first heating part 21, a second heating part 22 and an extension part 23, wherein the first heating part 21 is located in the sub-channel 131, the second heating part 22 is located at the end of the first heating part 21, and is used to connect adjacent first heating parts 21, the second heating part 22 is located in the converging channel 132, the extension part 23 is located at one end on the same side of the two outermost first heating parts 21, and one end is connected to the first heating part 21, and the other end is respectively formed as the positive electrode and the negative electrode of the heating element 20, and is respectively used to be electrically connected to the first connector 30 and the second connector 40.

[0132] Therefore, the heating element 20 can be arranged around the sub-channel 131, so that the heating element 20 can fully heat the plate body 10 and the cooling medium, improve the heating effect and heating efficiency, and at the same time, the heating element 20 can be symmetrical in the second direction or the third direction (based on the arrangement of the heat exchange channel 13) to make the heating uniformity of the heating element 20 better.

[0133] According to some embodiments of the present invention, the heating element 20 is configured as a positive temperature coefficient thermistor.

[0134] That is to say, the higher the temperature of the heating element 20, the greater the resistance. When the temperature is too high, the resistance of the heating element 20 rises to a larger value. At this time, the heating element 20 is equivalent to a short circuit, and overheating protection can be achieved to achieve overheating safety protection for the heat exchange plate 100, thereby improving the safety of the heat exchange plate 100.

[0135] According to some embodiments of the present invention, an outer surface of the heating element 20 is coated with an insulating layer.

[0136] In this way, insulation protection of the heating element 20 can be achieved, and the probability of leakage and short circuit of the heating element 20 can be reduced, so as to reduce potential safety hazards and improve safety.

[0137] like Figure 7 As shown, according to some embodiments of the present invention, the heating element 20 is constructed as a plate-shaped structure.

[0138] Specifically, the heating element 20 is flat, and the bonding area between the planar structure of the heating element 20 and the bottom wall or top wall of the open groove is larger, the fixing stability of the heating element 20 is higher, and the heating element 20 occupies less space in the heat exchange channel 13, and has a smaller impact on the flow resistance. The influence of the heating element 20 on the flow rate of the cooling medium can be reduced to improve the temperature regulation effect of the heat exchange plate 100.

[0139] Combination Figure 8 and Fig. 9 As shown, according to some embodiments of the present invention, a heat-conducting structural adhesive 50 is disposed between the heating element 20 and the plate body 10 .

[0140] Specifically, the thermally conductive structural adhesive 50 is arranged at least corresponding to the first heat exchange part and the second heat exchange part. The thermally conductive structural adhesive 50 is connected to the heating element 20 on one side in the first direction, and is connected to the second plate body 12 on the other side in the first direction. This can not only improve the fixing stability and reliability of the heating element 20, but also fill the gaps on the heating element 20 and the second plate body 12 through the thermally conductive structural adhesive 50, so that the indirect contact between the heating element 20 and the second plate body 12 is more sufficient, thereby improving the heating efficiency and improving the heating uniformity.

[0141] In a second aspect, the utility model provides a thermal management system, comprising: at least one heat exchange plate 100 in the above embodiment.

[0142] like Figure 1 and Figure 2 As shown, the utility model provides a battery pack 300, including: the thermal management system in the above embodiment.

[0143] The utility model provides an energy storage system, comprising: the battery pack 300 in the above embodiment.

[0144] like Figure 1 As shown, the utility model provides an electric device 400, including: the battery pack 300 in the above embodiment.

[0145] According to the heat exchange plate 100 of the embodiment of the utility model, the first plate body 11 and the second plate body 12 are stacked in the first direction, and a heat exchange channel 13 is spliced ​​in the first direction. A cooling medium and a heating element 20 can be arranged in the heat exchange channel 13. The positive electrode and the negative electrode of the heating element 20 are respectively connected to the external first connector 30 and the second connector 40 through the first through hole 16 and the second through hole 17. The heat exchange channel 13 is connected to the external cooling medium supply pipeline through the cooling medium inlet 14 and the cooling medium outlet 15, so that the first surface a, the second surface b and the third surface c of the heat exchange plate 100 can all be formed as heat exchange surfaces.

[0146] Furthermore, in an embodiment where the heat exchange plate 100 is applied to a battery pack, the heat exchange plate 100 may be disposed at the bottom, side or top of a plurality of battery cells 200 and adapted to be in contact with the battery cells 200 for heat exchange, thereby achieving temperature regulation of the battery cells 200 .

[0147] Other structures and operations of the heat exchange plate 100, thermal management system, battery pack, energy storage system and electrical device 400 according to the embodiment of the utility model are known to ordinary technicians in the field and will not be described here.

[0148] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0149] Although the embodiments of the present invention have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. A heat exchange plate, characterized in that: include: A plate body (10), the plate body (10) comprising: a first plate body (11) and a second plate body (12) assembled in a first direction, the first plate body (11) and / or the second plate body (12) being provided with opening grooves facing each other and assembled to form a heat exchange flow channel (13), the heat exchange flow channel (13) being suitable for accommodating a cooling medium, and in the first direction, the opening size of the opening groove gradually decreases in a direction away from the first plate body (11); A heating element (20), wherein the heating element (20) is arranged in the heat exchange flow channel (13); wherein The cooling medium is suitable for flowing in the heat exchange channel (13) and exchanging heat with the plate body (10), the heating element (20) is suitable for heating the plate body (10) in the heat exchange channel (13), and at least one surface of the plate body (10) is formed as a heat exchange surface.

2. The heat exchange plate according to claim 1, characterized in that: In the first direction, the cross-sectional profile of the heat exchange channel (13) is trapezoidal.

3. The heat exchange plate according to claim 2, characterized in that: The heating element (20) is arranged on the second plate body (12) and is located at the end of the opening groove having a smaller opening size.

4. The heat exchange plate according to claim 1, characterized in that: The plate body (10) has two first surfaces (a) opposite to each other in a first direction, two second surfaces (b) opposite to each other in a second direction, and two third surfaces (c) opposite to each other in a third direction, and at least one of the first surface (a), the second surface (b) and the third surface (c) is formed as a heat exchange surface, and the first direction, the second direction and the third direction are orthogonal to each other.

5. The heat exchange plate according to claim 4, characterized in that: The plate body (10) is provided with a cooling medium outlet (15) and a cooling medium inlet (14) which are connected to the heat exchange channel (13); the cooling medium inlet (14) and the cooling medium outlet (15) are both formed on the same first surface (a), or the same second surface (b), or the same third surface (c).

6. The heat exchange plate according to claim 5, characterized in that: The plate body (10) is also provided with a first via hole (16) and a second via hole (17) for electrically connecting the heating element (20); the first via hole (16) and the second via hole (17) are both formed on the same first surface (a), or the same second surface (b), or the same third surface (c).

7. The heat exchange plate according to claim 6, characterized in that: The cooling medium outlet (15), the cooling medium inlet (14), the first via hole (16), and the second via hole (17) are formed on the same first surface (a), or the same second surface (b), or the same third surface (c).

8. The heat exchange plate according to claim 6, characterized in that: The first via hole (16) is provided with a first connector (30), and the second via hole (17) is provided with a second connector (40); the first connector (30) is electrically connected to the positive pole of the heating element (20), and the second connector (40) is electrically connected to the negative pole of the heating element (20).

9. The heat exchange plate according to any one of claims 1 to 8, characterized in that: The heat exchange flow channel (13) comprises a plurality of sub-flow channels (131) connected in parallel, and the plurality of sub-flow channels (131) are connected to the outside through a converging flow channel (132).

10. The heat exchange plate according to claim 9, characterized in that: The heating element (20) is arranged around the plurality of sub-flow channels (131).

11. The heat exchange plate according to any one of claims 1 to 8, characterized in that: The heating element (20) is configured as a positive temperature coefficient thermistor.

12. The heat exchange plate according to any one of claims 1 to 8, characterized in that: The outer surface of the heating element (20) is coated with an insulating layer.

13. The heat exchange plate according to any one of claims 1 to 8, characterized in that: The heating element (20) is constructed as a plate-shaped structure.

14. The heat exchange plate according to any one of claims 1 to 8, characterized in that: A heat-conducting structural adhesive (50) is provided between the heating element (20) and the plate body (10).

15. A thermal management system, characterized in that: include: At least one heat exchange plate according to any one of claims 1 to 14.

16. A battery pack, characterized in that: include: The thermal management system of claim 15.

17. An energy storage system, characterized in that: include: The battery pack as claimed in claim 16.

18. An electrical device, characterized in that: include: The battery pack as claimed in claim 16.

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