Cooling box of energy storage device, energy storage device and electric equipment

Abstract

The utility model provides a cooling box of an energy storage device, the energy storage device and electric equipment. The cooling box comprises a box body and a cooling plate. The box body is provided with an accommodating cavity. The cooling plate is arranged in the accommodating cavity, and the cooling plate is provided with a flow channel, an inlet, an outlet and a fuse mounting position. The inlet and the outlet both communicate with the flow channel, and the inlet is used for allowing a refrigerant to enter the flow channel from the outside. And the outlet is used for allowing the refrigerant in the flow channel to flow out of the cooling plate. The fuse mounting position is used for mounting a fuse and is adjacent to the inlet.

Description

Technical Field

[0001] The present application relates to the field of battery technology, and in particular to a cooling box for an energy storage device, an energy storage device and electrical equipment. Background Art

[0002] In recent years, the new energy industry has accelerated its development, and electrochemical energy storage technology has continued to improve and demand has increased significantly. Among them, the safety and reliability of the use of energy storage devices are becoming more and more important. In order to ensure the efficient and reliable operation of energy storage devices, a reasonable thermal management system must be designed. As a widely used thermal management system, the liquid cooling system has the characteristics of high heat exchange efficiency and easy temperature control and regulation. However, as the number of battery cells in the battery module of the energy storage device increases, the energy storage capacity doubles, resulting in the current through the electrical device also doubling. The heat generated by the electrical device will radiate or conduct to the battery cells, resulting in the temperature of individual battery cells being too high, and the temperature difference and temperature rise between battery cells being too large, which does not meet the thermal management design requirements. Utility Model Content

[0003] In view of the above problems, the present application provides a cooling box for an energy storage device, an energy storage device and electrical equipment, which can solve the problem that the temperature difference and temperature rise between battery cells are too large and do not meet the thermal management design requirements.

[0004] In a first aspect, the present application provides a cooling box for an energy storage device, the cooling box comprising a box body and a cooling plate. The box body is provided with a containing cavity. The cooling plate is arranged in the containing cavity, and the cooling plate is provided with a flow channel, an inlet, an outlet and a fuse installation position. The inlet and the outlet are both connected to the flow channel, and the inlet is used for supplying refrigerant to enter the flow channel from the outside. The outlet is used for supplying refrigerant in the flow channel to flow out of the cooling plate. The fuse installation position is used for installing a fuse, and the fuse installation position is adjacent to the inlet.

[0005] In the cooling box of the above technical solution, the fuse installation position is adjacent to the inlet, that is, compared with the outlet, the fuse installation position is closer to the inlet. Since the temperature of the refrigerant at the inlet is usually a low-temperature refrigerant, the heat dissipation effect at the inlet position is better, and the heat generated by the fuse can be dissipated in time without being radiated and conducted to the battery cell at the fuse installation position, so that the temperature difference between the battery cell at the fuse installation position and the battery cell at other positions is greatly reduced, which can meet the design requirements of the thermal management temperature difference of the battery module.

[0006] As an optional technical solution of the present application, the inlet, the outlet and the fuse installation position are located at the same end of the cooling plate, and in the width direction of the cooling plate, the inlet is located between the outlet and the fuse installation position.

[0007] In the above technical solution, the inlet, outlet and fuse installation positions are located at the same end of the cooling plate. Correspondingly, the refrigerant inlet pipe, refrigerant outlet pipe and fuse are all located at the same end of the cooling plate. On the one hand, the installation of the refrigerant inlet pipe, refrigerant outlet pipe and fuse is simple and can be installed at the same end of the cooling plate at one time; on the other hand, the cooling plate can free up more space for the battery module to dissipate heat.

[0008] As an optional technical solution of the present application, a projection of the fuse mounting position on the cooling plate at least partially overlaps with a projection of the flow channel on the cooling plate.

[0009] In the above technical solution, the refrigerant in the flow channel can flow through the area where the fuse is located once or multiple times, and the heat generated by the fuse can be quickly taken away by the refrigerant in the flow channel, so the heat dissipation efficiency of the fuse is high.

[0010] As an optional technical solution of the present application, the flow channel includes multiple media inlet flow channels and at least one media outlet flow channel, the inlet ends of the multiple media inlet flow channels converge and connect at one point, the inlet is connected to the convergence and connection point of the multiple media inlet flow channels, the outlet ends of the multiple media inlet flow channels are all connected to the inlet end of the media outlet flow channel, the outlet end of the media outlet flow channel is connected to the outlet, and the flow rate of each media outlet flow channel is greater than the flow rate of each media inlet flow channel.

[0011] In the above technical solution, the flow rate of each outlet flow channel is greater than the flow rate of each inlet flow channel. The flow channel layout at this time can make the overall heat dissipation of the flow channel more balanced, further ensuring that the temperature difference between multiple battery cells will not be large, and meeting the design requirements of the thermal management temperature difference of the battery module.

[0012] As an optional technical solution of the present application, a partition beam is provided in the accommodating cavity, and the partition beam divides the accommodating cavity into at least two sub-cavities. The cooling plate is provided with at least two heat dissipation zones and a transition zone. At least two heat dissipation zones are arranged in sequence along the length direction of the cooling plate, and each heat dissipation zone corresponds to one sub-cavity. The transition zone connects two adjacent heat dissipation zones, and the transition zone corresponds to the partition beam. On the cooling plate, a spoiler structure is provided on at least one of the medium inlet flow channels that does not overlap with the projection of the fuse installation position. The spoiler structure is located in the transition zone and is used to accelerate the flow of the refrigerant.

[0013] In the above technical solution, a spoiler structure is provided on at least one medium inlet flow channel that does not overlap with the projection of the fuse installation position. The spoiler structure is located in the transition zone. When the refrigerant flows through the spoiler structure, the flow rate becomes smaller and the flow velocity becomes faster. The heat that can be taken away is much smaller than the heat that the refrigerant in the flow channel in the heat dissipation zone can take away. This can avoid the temperature drop of the battery cells near the transition zone being smaller than the temperature drop of the battery cells in the heat dissipation zone, and can ensure that the temperature difference between the battery cells in various locations after heat dissipation will not be large, thereby meeting the design requirements of the thermal management temperature difference of the battery module.

[0014] As an optional technical solution of the present application, the fuse installation position is provided with a heat-conducting structure, and the heat-conducting structure is used to transfer the heat on the fuse to the flow channel.

[0015] In the above technical solution, when a heat-conducting structure is set at the fuse installation position, the heat of the fuse can be quickly transferred to the flow channel through the heat-conducting structure, and then carried away by the refrigerant in the flow channel. The heat carried by the refrigerant is dissipated as the refrigerant flows out to the outside of the cooling plate. Therefore, the setting of the heat-conducting structure improves the heat dissipation efficiency of the fuse.

[0016] As an optional technical solution of the present application, the fuse installation position is provided with a heat insulation structure, and the heat insulation structure is used to prevent the heat on the fuse from being transferred to the outside of the heat insulation structure.

[0017] In the above technical solution, the heat insulation structure can prevent the heat generated by the fuse from being transferred to the outside of the heat insulation structure, that is, to the battery module, thereby reducing the impact of the heat generated by the fuse on the battery module.

[0018] As an optional technical solution of the present application, the cooling plate is provided with a dummy flow channel near the inlet, and the dummy flow channel is separated from and not connected to the flow channel.

[0019] In the above technical solution, the provision of the false flow channel can increase the structural strength of the cooling plate and ensure the service life of the cooling plate.

[0020] In a second aspect, the present application provides an energy storage device, the energy storage device comprising a cooling box, a battery module and a fuse according to any one of the above technical solutions. The battery module is installed in the box body of the cooling box, and the cooling plate is located at one end of the battery module. The fuse is installed in the fuse installation position and is electrically connected to the battery module.

[0021] In the energy storage device of the above technical solution, the fuse installation position of the cooling box is adjacent to the inlet, that is, compared with the outlet, the fuse installation position is closer to the inlet. Since the temperature of the refrigerant at the inlet is usually a low-temperature refrigerant, the heat dissipation effect at the inlet position is better. The heat generated by the fuse set at the fuse installation position can be dissipated in time without being radiated and conducted to the battery cell at the fuse installation position, so that the temperature difference between the battery cell at the fuse installation position and the battery cell at other positions is greatly reduced, which can meet the design requirements of the thermal management temperature difference of the battery module.

[0022] In a third aspect, the present application provides an electrical device, which includes an energy storage device according to any one of the above technical solutions, and the energy storage device is used to provide electrical energy.

[0023] In the electrical equipment of the above technical solution, the fuse installation position of the cooling box is adjacent to the inlet, that is, compared with the outlet, the fuse installation position is closer to the inlet. Since the temperature of the refrigerant at the inlet is usually a low-temperature refrigerant, the heat dissipation effect at the inlet position is better, and the heat generated by the fuse set at the fuse installation position can be dissipated in time without being radiated and conducted to the battery cell at the fuse installation position, so that the temperature difference between the battery cell at the fuse installation position and the battery cell at other positions is greatly reduced, which can meet the design requirements of the thermal management temperature difference of the battery module.

[0024] The above description is only an overview of the technical solution of the present application. In order to more clearly understand the technical means of the present application, it can be implemented in accordance with the contents of the specification. In order to make the above and other purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are listed below. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Various other advantages and benefits will become apparent to those of ordinary skill in the art by reading the detailed description of the preferred embodiments below. The accompanying drawings are only for the purpose of illustrating the preferred embodiments and are not to be considered as limiting the present application. Moreover, the same reference numerals are used throughout the drawings to represent the same components. In the drawings:

[0026] Figure 1 A three-dimensional assembly diagram of an energy storage device according to some embodiments of the present application;

[0027] Figure 2 for Figure 1 A three-dimensional exploded schematic diagram of the energy storage device shown;

[0028] Figure 3 for Figure 2 A schematic diagram of the three-dimensional assembly of the cooling plate of the energy storage device;

[0029] Figure 4 for Figure 2A three-dimensional exploded schematic diagram of a cooling plate of a central energy storage device;

[0030] Figure 5 for Figure 2 A schematic diagram of the planar structure of the cooling plate of the energy storage device;

[0031] Figure 6 This is a schematic diagram of the planar structure of electrical equipment in some implementation modes of the present application.

[0032] The reference numerals in the specific implementation manner are as follows:

[0033] Vehicles: 10,000;

[0034] Energy storage device 1000; controller 2000; motor 3000;

[0035] Cooling box 100, box body 10, first part 11, second part 13, accommodating chamber 101, cooling plate 30, first plate 301, second plate 303, width direction W, length direction L, flow channel 31, medium inlet flow channel 311, inlet end 3111 of medium inlet flow channel, outlet end 3113 of medium inlet flow channel, first medium inlet flow channel 3115, second medium inlet flow channel 3117, third medium inlet flow channel 3119, medium outlet flow channel 313, inlet end 3131 of medium outlet flow channel, outlet end 3133 of medium outlet flow channel, heat dissipation area 315, transition area 317, inlet 33, outlet 35, fuse installation position 36, heat conduction structure 37, spoiler structure 38, dummy flow channel 39;

[0036] Battery module 200;

[0037] Fuse 300. DETAILED DESCRIPTION

[0038] The following detailed description of the implementation of the technical solution of the present application is provided in conjunction with the accompanying drawings. The following implementation is only used to more clearly illustrate the technical solution of the present application, and is therefore only used as an example, and cannot be used to limit the scope of protection of the present application.

[0039] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by technicians in the technical field to which this application belongs; the terms used herein are only for the purpose of describing specific implementation methods and are not intended to limit this application; the terms "including" and "having" in the specification and claims of this application and the above-mentioned figure descriptions and any variations thereof are intended to cover non-exclusive inclusions.

[0040] In the description of the implementation methods of this application, the technical terms "first", "second", etc. are only used to distinguish different objects, and cannot be understood as indicating or implying relative importance or implicitly indicating the number, specific order or primary and secondary relationship of the indicated technical features. In the description of the implementation methods of this application, the meaning of "multiple" is more than two, unless otherwise clearly and specifically defined.

[0041] Reference to "embodiment" herein means that a particular feature, structure, or characteristic described in conjunction with the embodiment may be included in at least one embodiment of the present application. The appearance of the phrase in various locations 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. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0042] In the description of the embodiments of the present application, the term "and / or" is only a description of the association relationship of associated objects, indicating that three relationships may exist. 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 this article generally indicates that the associated objects before and after are in an "or" relationship.

[0043] In the description of the embodiments of the present application, the term "multiple" refers to more than two (including two). Similarly, "multiple groups" refers to more than two groups (including two groups), and "multiple pieces" refers to more than two pieces (including two pieces).

[0044] In the description of the embodiments of the present application, the technical terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "liquid level", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the embodiments of the present application 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 embodiments of the present application.

[0045] In the description of the implementation methods of the present application, unless otherwise clearly stipulated and limited, technical terms such as "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integrated connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be the internal connection of two elements or the interaction relationship between two elements.

[0046] See also Figure 1, this application provides an energy storage device 1000. Please refer to Figure 2 The energy storage device 1000 includes a cooling box 100, a battery module 200 and a fuse 300. The battery module 200 and the fuse 300 are both installed in the cooling box 100, and the fuse 300 is electrically connected to the battery module 200.

[0047] The energy storage device 1000 is a device composed of one or more energy storage battery modules 200. The energy storage device 1000 can store and release energy by connecting and controlling the battery cells 201 in the battery modules 200. The functions of the energy storage device 1000 include but are not limited to power source, energy storage, energy dispatch and energy storage power station. Specifically, in some applications, the energy storage device 1000 can be used as a power source for electrical equipment and can drive the electrical equipment to work when releasing electrical energy, such as driving a vehicle 10000 ( Figure 6 In some other applications, the energy storage device 1000 can convert electrical energy into chemical energy for storage to meet the electricity demand during peak energy demand periods, thereby playing the role of energy storage. In some other applications, the energy storage device 1000 can flexibly adjust the supply and demand of electrical energy, achieve energy balance and scheduling, and improve energy utilization, thereby playing the role of energy scheduling. In some other applications, the energy storage device 1000 can form an energy storage power station to store and schedule energy on a large scale, provide a reliable energy supply, and thus play the role of an energy storage power station.

[0048] The cooling box 100 is a box structure or cabinet structure for placing components. In the present application, the cooling box 100 is a box structure for placing a battery module 200 and a fuse 300. The cross-section of the cooling box 100 may be, but is not limited to, circular, oval, square or other polygonal. The material of the cooling box 100 includes, but is not limited to, metal or non-metal, wherein the metal includes aluminum, iron, steel, aluminum alloy or iron alloy, etc., and the non-metal includes, but is not limited to, plastic, etc. In the present application, the cross-section of the cooling box 100 is square, so that it can be easily integrated into the energy storage device 1000. The material of the cooling box 100 is aluminum alloy, so that while ensuring the rigidity, the energy storage device 1000 can also be made lighter and easier to transport, and will not increase the weight when applied to electrical equipment.

[0049] The battery module 200 is a module composed of one or more battery cells 201, and the battery cell 201 is the smallest unit for storing and releasing electric energy. Generally, a battery module 200 includes multiple battery cells 201, and the multiple battery cells 201 can be connected in series, in parallel, or in mixed connection. Mixed connection means that multiple battery cells 201 are both connected in series and in parallel. Multiple battery cells 201 can be directly connected in series, in parallel, or in mixed connection, and then the whole formed by the multiple battery cells 201 is accommodated in the cooling box 100; of course, the energy storage device 1000 can also be a form in which multiple battery cells 201 are first connected in series, in parallel, or in mixed connection to form a battery module 200, and multiple battery modules 200 are then connected in series, in parallel, or in mixed connection to form a whole, and are accommodated in the cooling box 100. The battery module 200 may also include other structures. For example, the battery module 200 may also include a converging component for realizing electrical connection between multiple battery cells 201.

[0050] The fuse 300 is a current protector that disconnects the circuit by melting the fuse with the heat generated by itself when the current exceeds the specified value. In the present application, the fuse 300 is electrically connected to the battery module 200. When a short circuit or overcharge problem occurs in the battery cell 201 in the battery module 200, causing the instantaneous current of the charge and discharge circuit of the battery module 200 to be too large, the fuse 300 melts, which can prevent the battery cell 201 from catching fire or exploding due to short circuit, overcharge and other problems, thereby improving the safety of the energy storage device 1000.

[0051] For details, please refer to Figures 2 to 5 In some embodiments, the cooling box 100 includes a box body 10 and a cooling plate 30. The box body 10 is provided with a receiving chamber 101. The cooling plate 30 is arranged in the receiving chamber 101, and the cooling plate 30 is provided with a flow channel 31, an inlet 33, an outlet 35 and a fuse installation position 36. The inlet 33 and the outlet 35 are both connected to the flow channel 31, and the inlet 33 is used to supply the refrigerant to enter the flow channel 31 from the outside. The outlet 35 is used to supply the refrigerant in the flow channel 31 to flow out of the cooling plate 30. The fuse installation position 36 is used to install the fuse 300, and the fuse installation position 36 is adjacent to the inlet 33, that is, compared with the outlet 35, the fuse installation position 36 is closer to the inlet 33. The cooling plate 30 is located at one end of the battery module 200. The fuse 300 is installed at the fuse installation position 36.

[0052] See also Figure 2The box 10 is a structure for providing a housing cavity 101 for the battery module 200, and the box 10 can adopt a variety of structures. In some embodiments, the box 10 may include a first part 11 and a second part 13, the first part 11 and the second part 13 cover each other, and the first part 11 and the second part 13 jointly define a housing cavity 101 for accommodating the battery cell 201. The second part 13 may be a hollow structure with one end open, and the first part 11 may be a plate-like structure, and the first part 11 covers the open side of the second part 13, so that the first part 11 and the second part 13 jointly define the housing cavity 101; the first part 11 and the second part 13 may also be hollow structures with one side open, and the open side of the first part 11 covers the open side of the second part 13. Of course, the box 10 formed by the first part 11 and the second part 13 may be in a variety of shapes, such as a cylinder, a cube, or a cuboid.

[0053] The cooling plate 30 is a component used to cool and dissipate heat for a specific component. The cooling plate 30 is arranged in the accommodating cavity 101, including but not limited to: the cooling plate 30 is non-detachably installed in the accommodating cavity 101 by at least one of welding connection and gluing connection, so that the cooling plate 30 can be firmly installed in the box body 10 and is not easy to fall off. The cooling plate 30 is detachably installed in the accommodating cavity 101 by at least one of snap connection and screw connection, so that the cooling plate 30 is convenient to be removed from the box body 10 for maintenance or replacement.

[0054] The cooling plate 30 is disposed at one end of the battery module 200. Since the battery module 200 is prone to generate heat during the charging and discharging process, if the heat is not dissipated in time, it is easy to cause the risk of fire and explosion. The cooling plate 30 is disposed at one end of the battery module 200, which can effectively dissipate the heat generated by the battery module 200, thereby ensuring the safety of the battery module 200. In addition, the battery module 200 includes a plurality of electrically connected battery cells 201. Since the voltage of the entire energy storage device 1000 remains unchanged, the capacity of the energy storage device 1000 doubles, resulting in a doubling of the current passing through the fuse 300. If no measures are taken, according to Joule's law, it can be known that the heat generated by the fuse 300 will increase to 4 times the original, and the heat generated by the fuse 300 will be radiated or conducted to the battery cell 201, resulting in the temperature of individual battery cells 201 being too high, and the temperature difference and temperature rise between the battery cells 201 being too large. Therefore, in the present application, the fuse 300 is installed on the fuse installation position 36 on the cooling plate 30, and the cooling plate 30 can effectively dissipate the heat generated by the fuse 300, thereby preventing the heat generated by the fuse 300 from being radiated or conducted to the battery cells 201, thereby causing excessive temperature difference and temperature rise between the battery cells 201.

[0055] Specifically, see Figure 3 and Figure 4The liquid cooling plate 30 may include a first plate 301 and a second plate 302, and the first plate 301 and the second plate 302 are combined to form a flow channel 31. In the cooling plate 30, the flow channel 31 is a passage for the refrigerant to flow in the cooling plate 30, and the refrigerant includes but is not limited to water, helium, nitrogen or hydrocarbons. The inlet 33 is a port for the refrigerant to flow into the flow channel 31. The inlet 33 is used to connect to the external refrigerant input pipe. The refrigerant in the refrigerant input pipe can enter the flow channel 31 through the inlet 33. Please refer to Figure 2 When the refrigerant flows in the flow channel 31, it will take away the heat generated by the battery module 200 and the fuse 300. When the refrigerant flows to the outlet 35, the temperature of the refrigerant will be higher than when it flows through the inlet 33. The outlet 35 is a port for the refrigerant to flow out of the flow channel 31. The outlet 35 is used to connect with the external refrigerant output pipe. The refrigerant with increased temperature in the flow channel 31 is output from the refrigerant output pipe to the outside of the energy storage device 1000 through the outlet 35. The refrigerant reaching the outside of the energy storage device 1000 can dissipate heat and cool down by heat exchange or radiation. The cooled refrigerant can enter the refrigerant input pipe again, and then re-enter the flow channel 31 through the inlet 33 to form a cooling cycle system.

[0056] Please also read Figure 2 and Figure 5In the present application, the fuse installation position 36 is closer to the inlet 33 than the outlet 35. That is, the fuse 300 is arranged closer to the inlet 33. The temperature of the refrigerant at the inlet 33 is usually a low-temperature refrigerant. As the refrigerant flows in the flow channel 31, the refrigerant will take away the heat generated by the battery module 200 and the fuse 300, and the temperature of the refrigerant will gradually increase. At present, conventionally, when the fuse is arranged at the outlet position of the cooling plate, the temperature of the refrigerant at the outlet is 2.5°C higher than the temperature of the refrigerant at the inlet, resulting in a poor heat dissipation effect at the outlet position. The heat generated by the fuse cannot be dissipated in time and will be radiated and conducted to the battery cell at the fuse installation position, resulting in the temperature of the battery cell at the fuse installation position being much higher than that of the battery cell at other positions, that is, the temperature difference between the battery cells is too large, and the maximum temperature difference can be as high as 3.4°C, which does not meet the design requirement that the thermal management temperature difference of the battery module needs to be less than or equal to 3°C. In the present application, the fuse 300 is installed on the cooling plate 30 at a position closer to the inlet 33 than the outlet 35. Since the temperature of the refrigerant at the inlet 33 is usually a low-temperature refrigerant, the heat dissipation effect at the inlet 33 is better, and the heat generated by the fuse 300 can be dissipated in time without being radiated and conducted to the battery cell 201 at the fuse installation position 36, so that the temperature difference between the battery cell 201 at the fuse installation position 36 and the battery cell 201 at other positions is greatly reduced, which can be reduced to 2.2°C, meeting the design requirement that the thermal management temperature difference of the battery module 200 is less than or equal to 3°C. At the same time, since the fuse 300 is arranged outside each battery cell 201 of the battery module 200, it will not affect the electrolyte inside the battery cell 201 and ignite the electrolyte when it is melted, which can further ensure the safety of the battery module 200.

[0057] Please also read Figure 2 and Figure 5 As an optional technical solution of the present application, the inlet 33, the outlet 35 and the fuse installation position 36 are located at the same end of the cooling plate 30, and in the width direction W of the cooling plate 30, the inlet 33 is located between the outlet 35 and the fuse installation position 36.

[0058] The inlet 33, outlet 35 and fuse installation position 36 are located at the same end of the cooling plate 30. Correspondingly, the refrigerant input pipe, refrigerant output pipe and fuse 300 are all located at the same end of the cooling plate 30. On the one hand, the installation of the refrigerant input pipe, refrigerant output pipe and fuse 300 is simple and can be installed at the same end of the cooling plate 30 at one time; on the other hand, the cooling plate 30 can free up more space for the battery module 200 to dissipate heat. In addition, in the width direction W of the cooling plate 30, the inlet 33 is located between the outlet 35 and the fuse installation position 36, which can ensure that the fuse 300 is closer to the inlet 33 than the outlet 35, so that the heat dissipation effect at the inlet is better, and the heat generated by the fuse 300 can be dissipated in time without being radiated and conducted to the battery cell 201 at the fuse installation position 36. Therefore, the temperature difference between the battery cell 201 at the fuse installation position 36 and the battery cell 201 at other positions is greatly reduced, which can meet the design requirements of the thermal management temperature difference of the battery module 200.

[0059] Please also read Figure 2 and Figure 5 As an optional technical solution of the present application, the projection of the fuse installation position 36 on the cooling plate 30 at least partially overlaps with the projection of the flow channel 31 on the cooling plate 30. Correspondingly, the projection of the fuse 300 on the cooling plate 30 at least partially overlaps with the projection of the flow channel 31 on the cooling plate 30. In some embodiments, the projection of the fuse 300 on the cooling plate 30 is completely covered by the projection of the flow channel 31 on the cooling plate 30. Specifically, in the width direction W of the cooling plate 30, the flow channel 31 can be bent back and forth in a serpentine shape. At this time, the refrigerant in the flow channel 31 can flow through the area where the fuse 300 is located for many times, and the heat generated by the fuse 300 can be quickly taken away by the refrigerant in the flow channel 31, and the heat dissipation efficiency of the fuse 300 is high. In other embodiments, the projection of the fuse 300 on the cooling plate 30 is partially covered by the projection of the flow channel 31 on the cooling plate 30, and partially not covered. Specifically, in the width direction W of the cooling plate 30, the flow channel 31 still bends back and forth in a serpentine shape, but a part of the fuse 300 is located outside the serpentine area. At this time, the refrigerant in the flow channel 31 can flow through the area where the fuse 300 is located at least once, and the heat generated by the fuse 300 can also be taken away by the refrigerant in the flow channel 31, and the heat dissipation efficiency of the fuse 300 is also relatively high.

[0060] Of course, in other technical solutions, the projection of the fuse installation position 36 on the cooling plate 30 and the projection of the flow channel 31 on the cooling plate 30 may not overlap at all. That is, the projection of the fuse 300 on the cooling plate 30 and the projection of the flow channel 31 on the cooling plate 30 may not overlap at all. In this case, the fuse installation position 36 only needs to be closer to the inlet 33 than the outlet 35, that is, the fuse 300 is arranged closer to the inlet 33 to achieve effective heat dissipation of the fuse 300.

[0061] See also Figure 5 In some embodiments, the flow channel 31 includes multiple media inlet flow channels 311 and at least one media outlet flow channel 313. The inlet ends 3111 of the multiple media inlet flow channels 311 converge and connect at one point. The inlet 33 is connected to the convergence connection point of the multiple media inlet flow channels 311. The outlet ends 3113 of the multiple media inlet flow channels 311 are all connected to the inlet end 3131 of the media outlet flow channel 313. The outlet end 3133 of the media outlet flow channel 313 is connected to the outlet 35. The flow rate of each media outlet flow channel 313 is greater than the flow rate of each media inlet flow channel 311.

[0062] As mentioned above, the refrigerant includes but is not limited to water, helium, nitrogen or hydrocarbons. When the refrigerant is liquid, the flow channel 31 includes a plurality of liquid inlet flow channels 31 and a liquid outlet flow channel 31, the inlet 33 is the liquid inlet, and the outlet 35 is the liquid outlet; when the refrigerant is helium, nitrogen or hydrocarbons, the flow channel 31 includes a plurality of inlet flow channels 31 and a outlet flow channel 31, the inlet 33 is the air inlet, and the outlet 35 is the air outlet.

[0063] The number of the medium inlet flow channels 311 is 2, 3, 4 or more, and the number of the coal outlet flow channels 31 is 1, 2, 3, 4 or more. In some embodiments, the number of the medium inlet flow channels 311 is greater than the number of the coal outlet flow channels 31, such as Figure 5 The flow channel 31 shown includes three medium inlet flow channels 311 and one medium outlet flow channel 313, and the flow rate of each medium outlet flow channel 313 is greater than the flow rate of each medium inlet flow channel 311. At this time, the flow rates of the three medium inlet flow channels 311 are all I, and they can take away Q heat respectively, and the total heat that can be taken away is 3IQ; the refrigerants in the three medium inlet flow channels 311 are heated and converged into the coal outlet flow channel 31, so that the flow rate in the coal outlet flow channel 31 is 3I. Since the temperature of the refrigerant flowing through the coal outlet flow channel 31 has increased, the heat that can be taken away by each I becomes Q, and the total heat that can be taken away by the coal outlet flow channel 31 is also 3IQ. Therefore, the layout of the flow channel 31 of the three medium inlet flow channels 311 and the one medium outlet flow channel 313 can make the overall heat dissipation of the flow channel 31 more balanced, further ensuring that the temperature difference between the multiple battery cells 201 will not be large, and meeting the design requirements of the thermal management temperature difference of the battery module 200.

[0064] Please also read Figure 4 and Figure 5 Further, in some embodiments, a partition beam (not shown) is provided in the accommodating chamber 101, and the length direction of the partition beam is consistent with the width direction W of the cooling plate, and the partition beam divides the accommodating chamber 101 into at least two sub-cavities. The cooling plate 30 is provided with at least two heat dissipation zones 315 and a transition zone 317, and at least two heat dissipation zones 315 are arranged in sequence along the length direction L of the cooling plate 30, and each heat dissipation zone 315 corresponds to a sub-cavity, and the transition zone 317 connects two adjacent heat dissipation zones 315. The transition zone 317 corresponds to the partition beam, and on the cooling plate 30, at least one medium inlet flow channel 311 that does not overlap with the projection of the fuse installation position 36 is provided with a spoiler structure 38, and the spoiler structure 38 is located in the transition zone 317 and is used to accelerate the flow of the refrigerant.

[0065] Specifically, the energy storage device 1000 may include at least two battery modules 200, at least two battery modules 200 correspond to at least two sub-cavities one by one, each sub-cavity contains a battery module 200, and two battery modules 200 are separated by a partition beam. Among them, all battery modules 200 may be exactly the same, that is, the number and type of battery cells 201 of all battery modules 200 are the same; or, the battery modules 200 may be partially the same or partially different. For example, if there are three battery modules 200, namely the first battery module, the second battery module and the third battery module, the number and type of battery cells 201 in the first battery module are the same as the number and type of battery cells 201 in the second battery module, but are different from the number and type of battery cells 201 in the third battery module. Regardless of the number of battery modules 200 in the energy storage device 1000 , the cooling plate 30 corresponds to all the battery modules 200 , that is, the cooling plate 30 spans over all the battery modules 200 in the length direction L so as to cool all the battery modules 200 .

[0066] The heat dissipation zone 315 is the area on the cooling plate 30 corresponding to the sub-cavity, that is, the area on the cooling plate 30 corresponding to the battery module 200. The heat dissipation zone 315 needs to effectively dissipate heat for the corresponding battery module 200. Therefore, the flow channel 31 corresponding to the heat dissipation zone 315 needs to be designed to allow a large flow of refrigerant to flow through. The transition zone 317 is the area on the cooling plate 30 corresponding to the partition beam, that is, the transition zone 317 does not correspond to the battery module 200. Since the partition beam does not generate a large amount of heat like the battery module 200, the temperature of the battery cell 201 near the transition zone 317 is lower than the temperature of the battery cell 201 in the heat dissipation zone 315. The transition zone 317 does not have a large heat dissipation burden, so the flow channel 31 corresponding to the transition zone 317 does not need to be designed to allow a large flow of refrigerant to flow through. However, in order to balance the heat of the battery cells 201 at various locations, the flow channel 31 of the transition zone 317 needs to be designed as a structure with lower heat dissipation efficiency. Therefore, at least one medium inlet flow channel 311 that does not overlap with the projection of the fuse installation position 36 is provided with a spoiler structure 38, and the spoiler structure 38 is located in the transition zone 317, wherein the spoiler structure 38 can be as follows: Figure 5 At the confluence node shown in the figure, the flow rate of the refrigerant at the confluence node becomes smaller and the flow rate becomes faster, and the heat that can be taken away is much smaller than the heat that the refrigerant in the flow channel 31 of the heat dissipation zone 315 can take away. This can avoid the temperature drop of the battery cells 201 near the transition zone 317 being smaller than the temperature drop of the battery cells 201 in the heat dissipation zone 315, and can ensure that the temperature difference between the battery cells 201 at various locations after heat dissipation will not be large, thereby meeting the design requirements of the thermal management temperature difference of the battery module 200.

[0067] In the embodiment of the present application, the flow channel 31 includes three media inlet channels 311 and one media outlet channel 313. In the width direction W of the cooling plate 30, the first media inlet channel 3115, the second media inlet channel 3117, the third media inlet channel 3119 and the media outlet channel 313 are arranged in sequence. The projection of the first media inlet channel 3115 on the cooling plate 30 completely covers the projection of the fuse mounting position 36 on the cooling plate 30. The projections of the second media inlet channel 3117 and the third media inlet channel 3119 on the cooling plate 30 are completely separated from the projection of the fuse mounting position 36 on the cooling plate 30. The spoiler structure 38 may be provided on at least one of the medium inlet flow channels 311 that does not overlap with the projection of the fuse installation position 36. The spoiler structure 38 may be provided on the second medium inlet flow channel 3117, while the spoiler structure 38 is not provided on the third medium inlet flow channel 3119; or, the spoiler structure 38 is provided on the third medium inlet flow channel 3119, while the spoiler structure 38 is not provided on the second medium inlet flow channel 3117; or, the spoiler structure 38 is provided on the second medium inlet flow channel 3117, and the spoiler structure 38 is also provided on the third medium inlet flow channel 3119, such as Figure 5As shown. The number of the spoiler structures 38 on each medium inlet flow channel 311 may be one or more. When a spoiler structure 38 is provided on the second medium inlet flow channel 3117 and a spoiler structure 38 is also provided on the third medium inlet flow channel 3119, the structure and number of the spoiler structures 38 on the second medium inlet flow channel 3117 may be the same as the structure and number of the spoiler structures 38 on the third medium inlet flow channel 3119. Alternatively, the structure of the spoiler structure 38 on the second medium inlet flow channel 3117 is different from the structure of the spoiler structure 38 on the third medium inlet flow channel 3119, and the number of the spoiler structures 38 on the second medium inlet flow channel 3117 is also different from the number of the spoiler structures 38 on the third medium inlet flow channel 3119, as long as the throttling amount of the spoiler structure 38 on the second medium inlet flow channel 3117 is basically the same as the throttling amount of the spoiler structure 38 on the third medium inlet flow channel 3119.

[0068] See also Figure 2 and Figure 4 Furthermore, in some embodiments, the fuse mounting position 36 may be provided with a heat-conducting structure 37 , and the heat-conducting structure 37 is used to transfer the heat on the fuse 300 to the flow channel 31 .

[0069] Specifically, the heat-conducting structure 37 can be thermal grease or thermally conductive silica gel. Among them, thermal grease is also called heat dissipation paste and thermal conductive paste, which is a high thermal conductivity and electrically insulating organic silicon material. Thermal grease is a thermally conductive organic silicon grease-like composite made of organic silicone as the main raw material and adding materials with excellent heat resistance and thermal conductivity. Thermal grease has the characteristics of low oil separation, high and low temperature resistance, water resistance, ozone resistance, weather aging resistance, etc., and has a long service life. Thermally conductive silica gel is also called thermal conductive glue. It is a silicone gel made of organic silicone as the main body, with fillers, thermal conductive materials and other polymer materials added, and has good thermal conductivity and electrical insulation properties.

[0070] When a heat-conducting structure 37 is provided at the fuse mounting position 36, the heat of the fuse 300 can be quickly transferred to the flow channel 31 through the heat-conducting structure 37, and then carried away by the refrigerant in the flow channel 31. The heat carried by the refrigerant is dissipated as the refrigerant flows out to the outside of the cooling plate 30. Therefore, the setting of the heat-conducting structure 37 improves the heat dissipation efficiency of the fuse 300.

[0071] Furthermore, in some embodiments, the fuse installation position 36 may be provided with a heat insulation structure (not shown), and the heat insulation structure is used to prevent the heat on the fuse 300 from being transferred to the outside of the heat insulation structure.

[0072] Specifically, the thermal insulation structure may be wrapped around the side wall of the fuse 300. In some embodiments, the thermal insulation structure may be aerogel. Since aerogel is generally more than 80% air, it has a very good thermal insulation effect. The aerogel can prevent the heat generated by the fuse 300 from being transferred to the outside of the aerogel, such as toward the battery module 200, thereby reducing the effect of the heat generated by the fuse 300 on the battery module 200.

[0073] See also Figure 5 Furthermore, in some embodiments, the cooling plate 30 is provided with a dummy flow channel 39 near the inlet 33 , and the dummy flow channel 39 is spaced apart from and not connected to the flow channel 31 .

[0074] In some embodiments, the false flow channel 39 is a protruding structure, and the protruding structure forms a cavity, which is similar to the cavity of the flow channel 31, but no refrigerant enters the cavity of the protruding structure, so the protruding structure is called the false flow channel 39. The provision of the false flow channel 39 can increase the structural strength of the cooling plate 30 and ensure the service life of the cooling plate 30.

[0075] See also Figure 6 This application provides an electrical device, please combine Figure 2 The electrical equipment includes the energy storage device 1000 of any one of the above technical solutions, and the energy storage device 1000 is used to provide electrical energy.

[0076] The energy storage device 1000 disclosed in the present application can be used in various energy storage systems that use the energy storage device 1000 as a power source or use the energy storage device 1000 as an energy storage element. The electrical equipment can be, but is not limited to, a mobile phone, a tablet, a laptop, an electric toy, an electric tool, a battery car, an electric car, a ship or a spacecraft, etc. Among them, the electric toy can include a fixed or mobile electric toy, for example, a game console, an electric car toy, an electric ship toy, and an electric airplane toy, etc., and the spacecraft can include an airplane (including a drone), a rocket, a space shuttle, and a spacecraft, etc.

[0077] This application is only explained by taking the electric equipment as vehicle 10000 as an example. Figure 6 , Figure 6A schematic diagram of the structure of a vehicle 10000 provided for some embodiments of the present application. The vehicle 10000 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. An energy storage device 1000 is provided inside the vehicle 10000, and the energy storage device 1000 may be provided at the bottom, head or tail of the vehicle 10000. The energy storage device 1000 may be used to supply power to the vehicle 10000, for example, the energy storage device 1000 may be used as an operating power source for the vehicle 10000. The vehicle 10000 may also include a controller 2000 and a motor 3000, and the controller 2000 is used to control the energy storage device 1000 to supply power to the motor 3000, for example, for the starting, navigation and working power requirements of the vehicle 10000 during driving.

[0078] In some embodiments of the present application, the energy storage device 1000 can not only serve as an operating power source for the vehicle 10000, but also serve as a driving power source for the vehicle 10000, replacing or partially replacing fuel or natural gas to provide driving power for the vehicle 10000.

[0079] In the electrical equipment of the above technical solution, the fuse installation position 36 is adjacent to the inlet 33, that is, compared with the outlet 35, the fuse installation position 36 is closer to the inlet 33. Since the temperature of the refrigerant at the inlet 33 is usually a low-temperature refrigerant, the heat dissipation effect at the inlet 33 is better, and the heat generated by the fuse 300 can be dissipated in time without being radiated and conducted to the battery cell 201 at the fuse installation position 36, so that the temperature difference between the battery cell 201 at the fuse installation position 36 and the battery cell 201 at other positions is greatly reduced, which can meet the design requirements of the thermal management temperature difference of the battery module 200.

[0080] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them; although the present application has been described in detail with reference to the above embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the above embodiments, or replace some or all of the technical features therein by equivalents; 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 various embodiments of the present application, and they should all be included in the scope of the claims and specification of the present application. In particular, as long as there is no structural conflict, the various technical features mentioned in each embodiment can be combined in any way. The present application is not limited to the specific embodiments disclosed herein, but includes all technical solutions that fall within the scope of the claims.

Claims

1. A cooling box for an energy storage device, characterized in that: The cooling box comprises: A box body, wherein the box body is provided with a containing cavity; and A cooling plate, wherein the cooling plate is arranged in the accommodating cavity, and the cooling plate is provided with a flow channel, an inlet, an outlet and a fuse installation position, wherein the inlet and the outlet are both connected to the flow channel, the inlet is used for supplying refrigerant to enter the flow channel from the outside, the outlet is used for supplying refrigerant in the flow channel to flow out of the cooling plate, the fuse installation position is used for installing a fuse, and the fuse installation position is adjacent to the inlet.

2. The cooling box according to claim 1, characterized in that: The inlet, the outlet and the fuse installation position are located at the same end of the cooling plate, and in the width direction of the cooling plate, the inlet is located between the outlet and the fuse installation position.

3. The cooling box according to claim 1, characterized in that: The projection of the fuse mounting position on the cooling plate at least partially overlaps with the projection of the flow channel on the cooling plate.

4. The cooling box according to claim 1, characterized in that: The flow channel includes a plurality of media inlet flow channels and at least one media outlet flow channel, the inlet ends of the plurality of media inlet flow channels converge and communicate at one point, the inlet is communicated with the convergence and communication point of the plurality of media inlet flow channels, the outlet ends of the plurality of media inlet flow channels are all communicated with the inlet end of the media outlet flow channel, the outlet end of the media outlet flow channel is communicated with the outlet, and the flow rate of each of the media outlet flow channels is greater than the flow rate of each of the media inlet flow channels.

5. The cooling box according to claim 4, characterized in that: A partition beam is provided in the accommodating cavity, and the partition beam divides the accommodating cavity into at least two sub-cavities. The cooling plate is provided with at least two heat dissipation zones and a transition zone. At least two heat dissipation zones are arranged in sequence along the length direction of the cooling plate. Each heat dissipation zone corresponds to one sub-cavity. The transition zone connects two adjacent heat dissipation zones. The transition zone corresponds to the partition beam. On the cooling plate, a spoiler structure is provided on at least one of the medium inlet flow channels that does not overlap with the projection of the fuse installation position. The spoiler structure is located in the transition zone and is used to accelerate the flow of the refrigerant.

6. The cooling box according to claim 1, characterized in that: The fuse installation position is provided with a heat-conducting structure, and the heat-conducting structure is used to transfer the heat on the fuse to the flow channel.

7. The cooling box according to claim 1, characterized in that: The fuse installation position is provided with a heat insulation structure, and the heat insulation structure is used to prevent the heat on the fuse from being transferred to the outside of the heat insulation structure.

8. The cooling box according to claim 1, characterized in that The cooling plate is provided with a dummy flow channel near the inlet, and the dummy flow channel is spaced from and not connected to the flow channel.

9. An energy storage device, characterized in that: include: The cooling box according to any one of claims 1 to 8; A battery module, wherein the battery module is installed in the box body of the cooling box, and the cooling plate is located at one end of the battery module; and A fuse is installed at the fuse installation position and is electrically connected to the battery module.

10. An electrical device, characterized in that: The energy storage device comprises the energy storage device as claimed in claim 9, wherein the energy storage device is used to provide electrical energy.

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