Heat dissipation devices and electrical equipment

Abstract

The present application is applicable to the technical field of heat dissipation devices, and provides a heat dissipation device and electrical equipment. The heat dissipation device includes a shell, an exhaust passage is arranged in the shell, and the shell has a first air inlet, a second air inlet and a first exhaust port; the first air inlet and the second air inlet are both connected to one end of the exhaust passage, and the first exhaust port is connected to the other end of the exhaust passage. The first air inlet is used for the entry of the gas to be dissipated, the second air inlet is used for the entry of inert gas, and the first exhaust port is used for the discharge of the gas mixture of the gas to be dissipated and the inert gas. The heat dissipation device provided by the present application is applied to electrical equipment, and can cool down the combustible gas generated by the battery in the electrical equipment, thereby reducing the safety hazards caused by the combustible gas.

Description

Technical Field

[0001] The present application relates to the field of battery technology, and more specifically, to a heat dissipation device and an electrical device. Background Art

[0002] As environmental pollution becomes increasingly serious, people's environmental awareness is gradually increasing. At this time, the rapid rise of the new energy industry has provided a broad space for the application and development of power batteries. During the use of the battery, heat will accumulate inside the battery, and the accumulated heat will form flammable gas inside the battery. If the internal temperature and pressure of the battery exceed the safety threshold, the battery needs to discharge the internal flammable gas to reduce the internal temperature of the battery.

[0003] However, since the temperature of the battery is high, if the ambient temperature around the battery is also high, the flammable gas discharged from the battery still has the risk of combustion or explosion, which poses a certain safety hazard. Utility Model Content

[0004] The purpose of the embodiments of the present application is to provide a heat dissipation device and electrical equipment, including but not limited to solving the technical problem in the prior art that combustible gases discharged from batteries pose a risk of combustion or explosion.

[0005] To achieve the above purpose, the technical solution adopted in this application is:

[0006] In a first aspect, a heat dissipation device is provided, comprising a shell, an exhaust passage being arranged in the shell, the shell having a first air inlet, a second air inlet and a first exhaust port; the first air inlet and the second air inlet are both connected to one end of the exhaust passage, the first exhaust port is connected to the other end of the exhaust passage, the first air inlet is used for allowing the gas to be cooled to enter, the second air inlet is used for allowing the inert gas to enter, and the first exhaust port is used for discharging a mixed gas of the gas to be cooled and the inert gas.

[0007] The above-mentioned heat dissipation device can be used to dissipate the heat of the combustible gas generated by the battery. The combustible gas is the gas to be dissipated. The combustible gas enters the exhaust channel through the first air inlet, and the inert gas enters the exhaust channel through the second air inlet. In the exhaust channel, the combustible gas and the inert gas are mixed, which on the one hand reduces the concentration of the combustible gas and reduces the flammability, and reduces the temperature of the combustible gas, achieving a certain cooling effect. The combustible gas is further cooled in the process of flowing along the exhaust channel to the first exhaust port. In summary, the temperature of the gas discharged by the heat dissipation device is lower than the temperature of the combustible gas entering the exhaust channel through the first air inlet, which achieves the cooling of the combustible gas, thereby reducing the safety hazards of the combustible gas.

[0008] In a possible design, the exhaust channel includes a plurality of sub-channels distributed in sequence along a first direction, the extension direction of each sub-channel is arranged at an angle to the first direction, and adjacent sub-channels in the first direction are connected end to end.

[0009] In the embodiment of the present application, since the extension direction of the sub-channel is set at an angle to the first direction and adjacent sub-channels are connected end to end, the gas in the exhaust channel will turn when flowing from one sub-channel to another sub-channel. This arrangement can increase the distance between the first air inlet and the first exhaust hole, so that the combustible gas can flow in the exhaust channel for a longer time, and the heat dissipation effect is better.

[0010] In a possible design, the shell has an inner cavity, and a plurality of first baffles are installed in the inner cavity, and the plurality of first baffles divide the inner cavity into a plurality of sub-channels.

[0011] In the embodiment of the present application, the space of the inner cavity is divided into a plurality of sub-channels by a first baffle plate. The manufacturing process of the sub-channels is simple and is convenient for improving the space utilization of the inner cavity.

[0012] In one possible design, a plurality of second baffles are arranged in the exhaust channel along the gas flow direction, and the plurality of second baffles divide each sub-channel into a plurality of sub-chambers. Along the gas flow direction, two adjacent sub-chambers are connected by a connecting port, and the heights of two adjacent connecting ports are not equal. The connecting port is arranged on the second baffle or between the second baffle and the outer shell.

[0013] In the embodiment of the present application, since the heights of the connecting ports between two adjacent sub-chambers are not equal, in a sub-chamber, the height at which the gas enters and the height at which the gas is discharged are different, so that the flow path of the gas in the sub-chamber is inclined to the extension direction of the sub-channel, thereby allowing the gas to flow in the exhaust channel for a longer time, thereby improving the heat dissipation effect.

[0014] In a possible design, the first air inlet and the second air inlet are in communication with the same sub-chamber.

[0015] In the embodiment of the present application, the combustible gas is mixed with the inert gas upon entering the first sub-chamber, so that the combustible gas is cooled relatively quickly and the concentration of the combustible gas is reduced.

[0016] In one possible design, the outer shell has a top plate and a bottom plate arranged relative to each other in the height direction, the height of the second baffle plate is smaller than the distance between the top plate and the bottom plate, and along the gas flow direction, one of the two adjacent second baffle plates is connected to the top plate and forms a connecting port with the bottom plate, and the other second baffle plate is connected to the bottom plate and forms a connecting port with the top plate.

[0017] In the embodiment of the present application, a relatively low communication port can be formed by installing the second baffle plate on the top plate, and a relatively high communication port can be formed by installing the second baffle plate on the bottom plate, which facilitates the preparation of the communication port.

[0018] In a possible design, at least a partial area within the exhaust passage is provided with a porous structure.

[0019] In the embodiment of the present application, the temperature of the combustible gas can be further reduced by the porous structure, thereby further improving the heat dissipation effect of the heat dissipation device.

[0020] In a possible design, at least a partial area in the exhaust passage is provided with an adsorption structure, and the adsorption structure is capable of adsorbing combustibles.

[0021] In the embodiment of the present application, the adsorption structure can adsorb the combustibles in the combustible gas, thereby reducing the flammability of the combustible gas and improving the safety of the exhausted gas.

[0022] In a possible design, the first exhaust port is equipped with an explosion-proof valve, which is used to close the first exhaust port when the pressure in the exhaust channel is below a set value, and is used to open the first exhaust port when the pressure in the exhaust channel reaches the set value.

[0023] In the embodiment of the present application, since an explosion-proof valve is provided at the first exhaust port, when the combustible gas and the inert gas flow to the first exhaust port, they are not immediately discharged through the first exhaust port, but are discharged only when the pressure in the exhaust passage increases to a set value. This increases the residence time of the combustible gas and the inert gas in the exhaust passage, thereby improving the cooling effect on the combustible gas.

[0024] In a possible design, the bottom of the housing has a liquid reservoir, which is used to store condensed liquid.

[0025] In an embodiment of the present application, the combustible gas may form condensate on the inner wall of the shell during the cooling process. Since there is a liquid storage tank at the bottom of the shell, the condensate will flow and be stored in the liquid storage tank, reducing the possibility of the combustible gas carrying the condensate out of the first exhaust port.

[0026] An electrical device comprises a battery and a heat dissipation device as provided by any one of the above technical solutions, wherein the battery has a second exhaust port which is connected to a first air inlet in the heat dissipation device.

[0027] Since the electrical equipment includes the above-mentioned heat dissipation device, it at least has all the beneficial effects of the above-mentioned heat dissipation device, which will not be described in detail here. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0029] Figure 1 is a schematic structural diagram of a heat dissipation device provided by an embodiment of the present application;

[0030] Figure 2 is an exploded view of parts of a heat dissipation device provided by an embodiment of the present application;

[0031] Figure 3 is a schematic diagram of the arrangement position of a first baffle plate in a heat dissipation device provided in another embodiment of the present application;

[0032] Figure 4 is a schematic diagram of the gas flow direction in a heat dissipation device provided by an embodiment of the present application;

[0033] Figure 5 is a schematic diagram of the gas flow direction when the heat dissipation device provided by an embodiment of the present application is in a top view;

[0034] Figure 6 is a top view of a heat dissipation device provided by an embodiment of the present application;

[0035] Figure 7 yes Figure 6 A cross-sectional view of the heat dissipation device along line AA;

[0036] Figure 8 yes Figure 6 A cross-sectional view of the heat dissipation device along line BB;

[0037] Fig. 9 yes Figure 6 A cross-sectional view of the heat dissipation device along line CC;

[0038] Fig.10 is a schematic diagram of the structure of an electrical device provided by an embodiment of the present application;

[0039] Fig.11 is a structural schematic diagram of an electrical device provided by another embodiment of the present application;

[0040] Fig.12 is a structural schematic diagram of an electric device provided in another embodiment of the present application;

[0041] Fig.13 It is a structural schematic diagram of an electrical equipment provided in yet another embodiment of the present application.

[0042] The reference numerals in the above drawings are as follows:

[0043] 1- Heat dissipation device;

[0044] 2-Battery;

[0045] 3-pipeline; 3a-branch pipeline; 3b-main pipeline;

[0046] 4-Cabinet;

[0047] 10-housing; 11-first air inlet; 12-second air inlet; 13-first air outlet; 14-top plate; 15-bottom plate; 16-side plate;

[0048] 20-exhaust channel; 21-sub-channel; 211-sub-chamber;

[0049] 31-first baffle plate; 32-second baffle plate;

[0050] 40-porous structure;

[0051] 50- Explosion-proof valve. DETAILED DESCRIPTION

[0052] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present application more clearly understood, the present application is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0053] In the description of the embodiments of the present application, the term "plurality" refers to more than two (including two).

[0054] In the description of the embodiments of the present application, unless otherwise clearly specified 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 integral 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, and it can be the internal connection of two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the embodiments of the present application can be understood according to the specific circumstances.

[0055] It should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the heat dissipation device or element referred to 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 application.

[0056] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of this application, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0057] In the drawings of the embodiments of the present application, hollow arrows are used to indicate the direction of gas flow, solid arrows are used to indicate a space, such as a cavity, an opening, a groove, etc., and dotted arrows are used to point to the structure itself.

[0058] In some electrical equipment, such as electrical cabinets, larger batteries are usually used to power the electrical components in the electrical equipment. During use, the battery usually generates a lot of heat, which gradually accumulates inside the battery, causing the temperature inside the battery to gradually increase, and the pressure to gradually increase, forming flammable gas inside the battery. The battery is usually provided with a pressure relief zone. When the temperature inside the battery exceeds the safety threshold of the temperature, or when the pressure inside the battery exceeds the safety threshold of the pressure, the pressure relief zone of the battery will open, thereby discharging the flammable gas inside the battery. The heat of the flammable gas is relatively high. After the flammable gas is discharged, the temperature inside the battery will be relatively lower, and the pressure will be relatively lower. However, the battery is installed in the electrical cabinet, and there are a large number of electrical components in the electrical cabinet. After the flammable gas is discharged to the outside of the battery and close to the electrical components, the temperature of the flammable gas is high and there is still a risk of combustion or explosion, which makes the electrical cabinet have certain safety hazards.

[0059] Based on this, an embodiment of the present application provides a heat dissipation device, which has an exhaust channel, and the exhaust channel is respectively connected to two air inlets and one exhaust port, and the combustible gas enters the exhaust channel through one of the air inlets, and the inert gas enters the exhaust channel through the other air inlet. In the exhaust channel, the combustible gas and the inert gas are mixed to form a mixed gas. Since the temperature of the inert gas is usually lower than that of the combustible gas, the temperature of the mixed gas will be lower than that of the combustible gas, that is, it has a cooling effect on the combustible gas, and after the inert gas is mixed with the combustible gas, the concentration of the combustible gas is reduced, the combustion performance is reduced, and the safety performance is improved. In summary, the heat dissipation device can reduce the temperature of the combustible gas, reduce the combustion performance of the combustible gas, and reduce the safety hazards of electrical equipment using the heat dissipation device.

[0060] The heat dissipation device provided in the embodiment of the present application is explained in detail below.

[0061] like Figures 1 to 5 As shown, a heat dissipation device 1 provided in an embodiment of the present application includes a shell 10, an exhaust channel 20 is formed in the shell 10, the shell 10 has a first air inlet 11, a second air inlet 12 and a first exhaust port 13, the first air inlet 11 and the second air inlet 12 are both connected to one end of the exhaust channel 20, the first exhaust port 13 is connected to the other end of the exhaust channel 20, the first air inlet 11 is used for the introduction of gas to be dissipated, the second air inlet 12 is used for the introduction of inert gas, and the first exhaust port 13 is used for the discharge of a mixed gas of the gas to be dissipated and the inert gas.

[0062] The housing 10 has an inner cavity, and the housing 10 is used to accommodate or form an exhaust passage 20 . The exhaust passage 20 may be formed by the inner cavity of the housing 10 , or may be a pipe installed in the inner cavity of the housing 10 .

[0063] like Figure 2As shown, the housing 10 can be formed by a top plate 14, a side plate 16 and a bottom plate 15, and the bottom plate 15, the top plate 14 and the side plate 16 can be an integral structure, or the bottom plate 15, the side plate 16 and the top plate 14 are connected and surrounded to form an inner cavity. The top plate 14 and the bottom plate 15 are arranged opposite to each other, and the side plate 16 is connected between the top plate 14 and the bottom plate 15, or in other words, the top plate 14 and the bottom plate 15 are connected through the side plate 16. The side plate 16 is a closed annular structure, for example, when the housing 10 is a cylindrical structure, the side plate 16 is a circular annular structure; when the housing 10 is a prismatic structure, the side plate 16 is a polygonal annular structure. Exemplarily, the housing 10 is a cubic structure, the top plate 14 and the bottom plate 15 are both rectangular plate structures, the side plate 16 includes four plate bodies, the four plate bodies are arranged opposite to each other, and the four plate bodies are arranged to form a rectangular ring structure (or a rectangular frame structure), the bottom surfaces of the four plate bodies are connected to the edge of the bottom plate 15, and the top surfaces of the four plate bodies are connected to the edge of the top plate 14. In a specific example, the housing 10 includes a lower shell and a top plate 14, the lower shell includes a bottom plate 15 and a side plate 16, the bottom plate 15 and the side plate 16 are manufactured by an integrated molding process, and the top plate 14 and the lower shell can be connected by welding, clamping, bolting, etc. A sealing structure, such as a sealing ring, can be provided between the top plate 14 and the lower shell.

[0064] The exhaust channel 20 is used for gas to pass through. The exhaust channel 20 has two ends, one end is the head end for gas to enter, and the other end is the tail end for gas to be discharged. The gas flows from the head end to the tail end in the exhaust channel 20. The first air inlet 11 and the second air inlet 12 are both connected to the same end of the exhaust channel 20. The end of the air inlet channel connected to the first air inlet 11 and the second air inlet 12 is the head end, and the first exhaust port 13 is connected to the other end of the air inlet channel. The end of the air inlet channel connected to the first exhaust port 13 is the tail end. The first air inlet 11, the second air inlet 12 and the first exhaust port 13 can be respectively set on any one of the top plate 14, the side plate 16 or the bottom plate 15 of the housing 10.

[0065] The first air inlet 11, the second air inlet 12 and the first exhaust port 13 can be through holes penetrating the side plate 16 of the housing 10, or a cylinder is provided on the housing 10, the inner cavity of the cylinder penetrates the side plate 16 of the housing 10, and the inner cavity of the cylinder can be used to form the first air inlet 11, the second air inlet 12 or the first exhaust port 13. The cylinder can be a quick-connect connector, which is used to quickly connect with the pipeline, so as to facilitate the connection of the first air inlet 11 of the housing 10 with the discharge point of the heat gas to be dissipated.

[0066] The inert gas can be helium, argon, xenon, etc.

[0067] The first air inlet 11 is used for the gas to be cooled. The heat dissipation device 1 can be used to dissipate the combustible gas generated by the battery. The combustible gas is the gas to be cooled. The first air inlet 11 is used for the combustible gas of the battery to enter. The battery has an outlet for combustible gas, which is called the second exhaust port. The first air inlet 11 is connected to the second exhaust port. The first air inlet 11 and the second exhaust port can be connected directly or through a pipeline.

[0068] The second gas inlet 12 is used to introduce an inert gas. For example, the second gas inlet 12 may be connected to an inert gas generating device or an inert gas storage device.

[0069] When the heat dissipation device 1 is used to dissipate the heat of the combustible gas of the battery, the combustible gas of the battery enters the exhaust channel 20 through the first air inlet 11, and the inert gas enters the exhaust channel 20 through the second air inlet 12. In the exhaust channel 20, the combustible gas and the inert gas are mixed, which reduces the concentration of the combustible gas, reduces the flammability, and reduces the temperature of the combustible gas, achieving a certain cooling effect. The combustible gas is further cooled in the process of flowing along the exhaust channel 20 to the first exhaust port 13. In summary, the temperature of the gas discharged by the heat dissipation device 1 is lower than the temperature of the combustible gas entering the exhaust channel 20 through the first air inlet 11, thereby achieving the cooling of the combustible gas.

[0070] In a specific embodiment, the first air inlet 11, the second air inlet 12 and the first air outlet 13 are all arranged on the side plate 16 of the housing 10. In this way, the outer side of the top plate 14 of the housing 10 and the outer side of the bottom plate 15 of the housing 10 can be arranged as a plane, which is convenient for placing the housing 10 and installing the housing 10 into the electrical equipment.

[0071] like Figure 3 and Figure 5 As shown, in some embodiments, the exhaust channel 20 includes a plurality of sub-channels 21 distributed in sequence along a first direction, the extension direction of each sub-channel 21 is arranged at an angle to the first direction, and adjacent sub-channels 21 in the first direction are connected end to end.

[0072] The end where the gas enters the subchannel 21 is the head end, and the end where the gas is discharged from the subchannel 21 is the tail end. The multiple subchannels 21 are arranged in sequence in the first direction, and the extension direction of each subchannel 21 is at an angle to the first direction. Therefore, the flow direction of the gas in the subchannel 21 is different from the direction in which the gas flows from the tail end of one subchannel 21 to the head end of another subchannel 21, that is, the direction of the gas will change during the process of sequentially flowing in the multiple subchannels 21. When the distance between the first air inlet 11 and the first exhaust port 13 remains unchanged, the combustible gas undergoes multiple turns during the process of flowing from the first air inlet 11 to the first exhaust port, thereby increasing the moving path of the combustible gas and increasing the moving time. During the process of the combustible gas moving in the multiple subchannels 21, the contact time between the combustible gas and the inert gas increases, and the mixing is more uniform, which is conducive to better reducing the combustion performance of the combustible gas. In addition, during the process of the combustible gas moving in the multiple subchannels 21, the combustible gas and the side wall of the subchannel 21 undergo heat exchange, thereby further reducing the temperature of the combustible gas.

[0073] In summary, since the extension direction of the sub-channel 21 is set at an angle to the first direction, and adjacent sub-channels 21 are connected end to end, the gas in the exhaust channel 20 will turn when flowing from one sub-channel 21 to another sub-channel 21. This setting method can increase the distance between the first air inlet 11 and the first exhaust hole, so that the combustible gas can flow in the exhaust channel 20 for a longer time, and the heat dissipation effect is better.

[0074] In a specific embodiment, the first direction is perpendicular to the extension direction of the sub-channel 21, and the plurality of sub-channels 21 are arranged in parallel. For example, the first direction is the length direction of the housing 10, and the extension direction of the sub-channel 21 is the width direction of the housing 10. Figure 5 As shown, there are four sub-channels 21, the four sub-channels 21 are arranged parallel to each other, and the extension directions of the four sub-channels 21 are perpendicular to the first direction. Figure 4 and Figure 5 As shown, the height direction of the heat sink 1 is the Z-axis direction, the length direction of the heat sink 1 is the X-axis direction, and the width direction of the heat sink 1 is the Y-axis direction. The first direction can be the length direction of the heat sink 1, and the extension direction of the sub-channel 21 can be the width direction of the heat sink 1.

[0075] like Figure 3 As shown, in some embodiments, the housing 10 has an inner cavity, and a plurality of first baffles 31 are installed in the inner cavity, and the plurality of first baffles 31 divide the inner cavity into a plurality of sub-channels 21 .

[0076] The first baffles 31 are used to divide the inner cavity of the housing 10 into regions. A plurality of first baffles 31 are arranged at intervals in the first direction. Sub-channels 21 are formed between the first baffles 31 and the side surfaces of the housing 10 in the first direction, and between adjacent first baffles 31. The length of the first baffles 31 in the first direction is less than the length of the inner cavity in the first direction. A connection point between adjacent sub-channels 21 is formed between the end of the first baffles 31 in the extension direction of the sub-channels 21 and the housing 10, and two adjacent sub-channels 21 are connected through the gap.

[0077] In a specific example, for ease of description, the extension direction of the subchannel 21 is referred to as the second direction, and adjacent first baffles 31 are arranged in a staggered manner, that is, among two adjacent first baffles 31, one of the first baffles 31 has a gap between one end in the second direction and the housing 10, and the other first baffle 31 has a gap between the other end in the second direction and the housing 10, so that among the three subchannels 21 formed by the two first baffles 31, the connection between two subchannels 21 is located at one end in the second direction, and the connection between the other two subchannels 21 is located at the other end in the second direction. In the exhaust channel 20 formed by the connection of the seed channels 21, the flow path of the gas is a continuous S-shaped path, or a Z-shaped path.

[0078] In the embodiment of the present application, the space of the inner cavity is divided into a plurality of sub-channels 21 by a first baffle plate 31. The forming process of the sub-channels 21 is simple and convenient for improving the space utilization rate of the inner cavity. That is, in the inner cavity of the outer shell 10, except for the installation area of ​​the first baffle plate 31, other spaces are exhaust channels 20. Therefore, a relatively larger proportion of the inner cavity space can be utilized.

[0079] like Figures 5 to 9 As shown, in some embodiments, a plurality of second baffles 32 are arranged in the exhaust channel 20 along the gas flow direction, and the plurality of second baffles 32 divide each sub-channel 21 into a plurality of sub-chambers 211, respectively. Along the gas flow direction, two adjacent sub-chambers 211 are connected by a connecting port, and the heights of two adjacent connecting ports are not equal. The connecting port is arranged on the second baffle plate 32 or between the second baffle plate 32 and the outer shell 10.

[0080] The gas flow direction is the flow direction of the gas in the process of flowing toward the first exhaust port after the gas enters the exhaust channel 20 through the first air inlet 11 or the second air inlet 12 .

[0081] The second baffle plate 32 further divides the space in the sub-channel 21, and a sub-chamber 211 is formed between the second baffle plate 32 and the housing 10, and between adjacent second baffle plates 32. The communication port can be set on the second baffle plate 32, that is, the communication port can be formed by punching a hole in the second baffle plate 32. The communication port can be set between the second baffle plate 32 and the housing 10, that is, a gap is formed between the second baffle plate 32 and the housing 10, and the gap is used as the communication port. For example, Figure 5 In the embodiment, four sub-channels 21 are arranged in the housing 10 , and each sub-channel 21 has three sub-chambers 211 .

[0082] In the embodiment of the present application, since the heights of the connecting ports between two adjacent sub-chambers 211 are not equal, in one sub-chamber 211, the height at which the gas enters the sub-chamber 211 and the height at which the gas exits the sub-chamber 211 are different, so that the flow path of the gas in the sub-chamber 211 is inclined to the extension direction of the sub-channel 21, so that the gas flows in the exhaust channel 20 for a longer time, thereby improving the heat dissipation effect. Due to the arrangement of the first baffle plate 31 and the second baffle plate 32, the gas flow channel forms a three-dimensional S-shaped flow channel, which is a continuous S-shaped bending path in the horizontal direction and an S-shaped bending path with high and low staggered in the vertical direction. Since the moving path of the combustible gas in the sub-channel 21 is staggered in high and low, the moving path length and moving time of the combustible gas in the sub-channel 21 are extended, so that the combustible gas flows in the exhaust channel 20 for a longer time, and the heat dissipation effect is better.

[0083] In some embodiments, the first air inlet 11 and the second air inlet 12 are in communication with the same sub-chamber 211 .

[0084] like Figure 7 As shown, in the embodiment of the present application, the combustible gas is mixed with the inert gas upon entering the first sub-chamber 211 , so that the combustible gas is cooled relatively more quickly and the concentration of the combustible gas is reduced.

[0085] In some embodiments, the outer shell 10 has a top plate 14 and a bottom plate 15 that are relatively arranged in a height direction. The height of the second baffle plate 32 is smaller than the distance between the top plate 14 and the bottom plate 15. Along the gas flow direction, one of the two adjacent second baffle plates 32 is connected to the top plate 14 and forms a connecting port with the bottom plate 15, and the other second baffle plate 32 is connected to the bottom plate 15 and forms a connecting port with the top plate 14.

[0086] In the embodiment of the present application, by installing the second baffle plate 32 on the top plate 14, a relatively low communication port can be formed, and by installing the second baffle plate 32 on the bottom plate 15, a relatively high communication port can be formed, which facilitates the preparation of the communication port. In this arrangement, there is no need to punch holes in the second baffle plate 32, which simplifies the manufacturing process and improves the production efficiency of the heat dissipation device 1.

[0087] like Figure 2 , Figure 7 and Figure 8 As shown, in some embodiments, at least part of the area in the exhaust channel 20 is provided with a porous structure 40. The porous structure 40 may include a porous body made of a porous material, through which gas molecules are adsorbed, so that the gas molecules release heat, thereby achieving a cooling effect. The porous material may be a material with good thermal stability and chemical stability, such as silicon dioxide (SiO2), aluminum oxide (Al2O3), zirconium oxide (ZrO2) and titanium oxide (TiO2), activated carbon, graphite, porous glass, etc. The porous material can be prepared into a porous body that matches the size of the sub-chamber 211, and the porous body is placed in the sub-chamber 211. When the combustible gas passes through the sub-chamber 211, it will pass through the porous body, so that some gas molecules in the combustible gas are adsorbed into the porous body, so as to achieve a cooling effect on the combustible gas. Alternatively, the porous structure 40 may include a plurality of porous particles, and the porous structure 40 may also include a mesh bag, which is a bag-shaped structure with mesh holes, and the mesh bag is filled with porous particles, and the aperture of the mesh holes is smaller than the outer diameter of the porous particles, so that the porous particles will not fall out of the mesh bag. The mesh bag is placed in the sub-chamber 211, and since the mesh bag is filled with porous particles, the porous particles will naturally accumulate into a shape that matches at least a part of the sub-chamber 211, and even if the sizes of different sub-chambers 211 are different, the porous structure 40 can be provided.

[0088] In another specific setting, a mesh plate is provided at the connecting port of the sub-chamber 211 provided with the porous structure 40. The mesh plate is a plate-like structure with mesh holes. The sub-chamber 211 is filled with porous particles, and the aperture of the mesh holes is smaller than the outer diameter of the porous particles.

[0089] When the porous structure 40 includes a plurality of porous particles, there are gaps between adjacent plurality of granular porous materials, and the combustible gas can pass through the gaps, thereby reducing the resistance of the porous structure 40 to the combustible gas, thereby reducing the gas pressure in the previous sub-chamber 211 of the sub-chamber 211.

[0090] The porous structure 40 may be provided in all sub-chambers 211, or in one or several sub-chambers 211. Exemplarily, a porous structure 40 is provided in the sub-chamber 211 in the middle of each sub-channel 21 along the second direction. In this arrangement, the temperature of the combustible gas can be further reduced by the porous structure 40, thereby further improving the heat dissipation effect of the heat dissipation device 1. The gas pressure in the cooling channel can be reduced by the sub-chamber 211 not provided with the porous structure 40. When the heat dissipation structure is used to dissipate heat for batteries, especially lithium batteries, the combustible gas generated by the lithium battery may contain combustibles such as lithium salts and vaporized electrolytes. The porous structure 40 can also be used to adsorb electrolytes and lithium salts, thereby reducing the combustion performance of the combustible gas and improving the safety of the discharged gas.

[0091] In some embodiments, the exhaust passage 20 may be pre-filled with a portion of the inert gas, or the inert gas may be introduced into the exhaust passage 20 through the second air inlet 12 when the combustible gas is introduced through the first air inlet 11 .

[0092] In other embodiments, the second air inlet 12 is provided with a solenoid valve, the first air inlet 11 is installed with a flow sensor, and the second air inlet 12 is installed with a solenoid valve, which is used to open when the airflow detected by the flow sensor reaches a flow threshold, so that the inert gas enters the exhaust channel 20 through the second air inlet 12.

[0093] The flow sensor is used to detect the gas flow at the first air inlet 11. When the flow sensor detects that the gas flow reaches the flow threshold, that is, there is gas passing through the first air inlet 11, the solenoid valve is opened in this case, so that the inert gas enters the exhaust channel 20 through the second air inlet 12. In this way, the second air inlet 12 can be opened automatically, thereby automatically filling the inert gas.

[0094] like Figure 1 As shown, in some embodiments, the first exhaust port 13 is installed with an explosion-proof valve 50, which is used to close the first exhaust port 13 when the pressure in the exhaust channel 20 is below a set value, and is used to open the first exhaust port 13 when the pressure in the exhaust channel 20 reaches a set value.

[0095] The explosion-proof valve 50 can be a disposable explosion-proof valve 50 or a reusable explosion-proof valve 50. The disposable explosion-proof valve 50 is destroyed and cannot be restored when the pressure reaches the set value, and the reusable explosion-proof valve 50 is opened when the pressure reaches the set value or exceeds the set value, and returns to the closed state when the pressure drops below the set value.

[0096] In this arrangement, since an explosion-proof valve 50 is provided at the first exhaust port 13, when the combustible gas and the inert gas flow to the first exhaust port 13, they are not immediately discharged through the first exhaust port 13, but are discharged only when the pressure in the exhaust passage 20 increases to a set value. This increases the residence time of the combustible gas and the inert gas in the exhaust passage 20, thereby improving the cooling effect on the combustible gas.

[0097] In some embodiments, the bottom of the housing 10 has a liquid storage tank, which is used to store condensate. In some feasible implementations, a depression may be provided on the side of the bottom plate 15 of the housing 10 facing the top plate 14, and the depression is used as a liquid storage tank. Alternatively, a liquid storage tank is formed between the housing 10, the first baffle plate 31, and the second baffle plate 32. In a specific embodiment, a liquid storage tank may be formed in the sub-chamber 211 that is not provided with the porous structure 40. The condensate is the liquid formed by the gas after cooling.

[0098] In the embodiment of the present application, the combustible gas may form condensate on the inner wall of the housing 10 during the cooling process. Since the housing 10 has a liquid storage tank at the bottom, the condensate will flow and be stored in the liquid storage tank, reducing the possibility that the combustible gas will bring the condensate out of the first exhaust port 13. Since the condensate includes an electrolyte, the arrangement of the liquid storage tank stores the condensed electrolyte, thereby reducing the possibility that the combustible gas will bring the condensed electrolyte out of the housing 10, reducing the combustion performance of the gas discharged through the first exhaust port 13, and reducing the safety hazards of the electrical equipment to which the heat dissipation device 1 is applied.

[0099] In a specific embodiment, the heat dissipation device 1 includes a housing 10, the housing 10 includes a shell and a top plate 14, the shell includes a bottom plate 15 and a side plate 16 arranged around the edge of the bottom plate 15, the top plate 14 is arranged opposite to the bottom plate 15, the top plate 14 covers the side plate 16, and the top plate 14, the bottom plate 15 and the side plate 16 are jointly arranged to form an inner cavity. The inner cavity is used to form an exhaust channel 20. A plurality of first baffles 31 are arranged in the inner cavity along a first direction at intervals, and the first baffles 31 extend along a second direction, and the first direction and the second direction are parallel to the horizontal plane and perpendicular to each other. The plurality of first baffles 31 divide the inner cavity into a plurality of sub-channels 21. Among two adjacent first baffles 31, one of the first baffles 31 is connected to the side plate 16 at one end in the second direction, and a gap is formed between the other end and the side plate 16, and another first baffle 31 has a gap between the side plate 16 at one end in the second direction, and the other end is connected to the side plate 16. The plurality of first baffles 31 are arranged in parallel. A plurality of second baffles 32 are respectively arranged in each sub-channel 21, and the plurality of second baffles 32 are arranged at intervals in the second direction, and the plurality of second baffles 32 divide the sub-channel 21 into a plurality of sub-chambers 211. Among the second baffles 32 in the adjacent chain, one second baffle 32 is connected to the top plate 14 and forms a communication port with the bottom plate 15, and the other second baffle 32 is connected to the bottom plate 15 and forms a communication port with the top plate 14. A liquid storage tank is formed between the first baffle 31, the second baffle 32, the side plate 16 and the bottom plate 15. The side plate 16 of the housing 10 is provided with a first air inlet 11 and a second air inlet 12, and the first air inlet 11 and the second air inlet 12 are connected to the same sub-chamber 211, and the first air inlet 11 and the second air inlet 12 are arranged at intervals in the height direction. The first air inlet 11 is provided with a flow sensor, and the second air inlet 12 is provided with a solenoid valve. The housing 10 is provided with a first exhaust port 13, the first exhaust port 13 and the first air inlet 11 are located on the same plate body of the side plate 16, the first exhaust port 13 and the first air inlet 11 are connected to different sub-chambers 211, and the first exhaust port 13 is installed with an explosion-proof valve 50. A porous structure 40 is provided in a sub-chamber 211 in the middle area along the second direction in each sub-channel 21 (that is, a sub-chamber 211 not located at the head end or the tail end of the sub-channel 21), and the porous structure 40 includes a mesh bag, and a plurality of porous particles are filled in the mesh bag.

[0100] An embodiment of the present application also provides an electrical device, which includes a battery and a heat dissipation device provided by any of the above embodiments, wherein the battery has a second exhaust port, and the second exhaust port is connected to the first air inlet in the heat dissipation device.

[0101] Batteries are used in electrical equipment, including but not limited to: battery cars, electric vehicles, ships, spacecraft, and power cabinets. For the convenience of description, this example takes the power cabinet as an example of electrical equipment. Figures 10 to 13As shown, the electric cabinet comprises a cabinet body 4, in which a large number of electric components are installed. At least one battery 2 is also installed in the cabinet body 4, and the battery 2 is used to supply power to the electric components.

[0102] In one example, if Fig.10 As shown, a battery 2 may be installed in the cabinet 4, and the battery 2 is electrically connected to one or more electrical devices to supply power to the one or more electrical devices in the cabinet 4. The battery 2 has a second exhaust port, and the second exhaust port is equipped with an explosion-proof valve, and the second exhaust port is connected to the first air inlet of the heat dissipation device 1. The second exhaust port of the battery 2 and the first air inlet of the heat dissipation device 1 may be directly connected, or may be connected through a pipe 3, and the pipe 3 may be a hard pipe or a soft pipe. A sealing structure, such as a sealing ring, may be provided between the second exhaust port of the battery 2 and the first air inlet of the heat dissipation device 1, or the second exhaust port of the battery 2 and the first air inlet of the heat dissipation device 1 may be sealed and connected by welding or the like.

[0103] In another example, Figures 11 to 13 As shown, a plurality of batteries 2 may be installed in the cabinet 4, and the number of the heat dissipation devices 1 is equal to or less than the number of the batteries 2. Fig.11 As shown, when the number of heat sinks 1 is one, the second exhaust ports of the plurality of batteries 2 are all connected to the first air inlet of the heat sink 1. Exemplarily, the second exhaust ports of the batteries 2 are connected to the first air inlet of the heat sink 1 via a pipe 3, the pipe 3 includes a main pipe 3b and a plurality of branch pipes 3a, the plurality of branch pipes 3a are all connected to the main pipe 3b, and the second exhaust ports of the batteries 2 are connected to the branch pipes 3a one by one. Fig.12 As shown, when the number of heat sinks 1 is equal to the number of batteries 2, multiple heat sinks 1 are connected to multiple batteries 2 in a one-to-one correspondence. Fig.13 As shown, when the number of heat dissipation devices 1 is less than the number of batteries 2, the multiple batteries 2 can be divided into several power supply groups, each power supply group includes one or several batteries 2, and each power supply group is correspondingly provided with a heat dissipation device 1. When the power supply group includes one battery 2, the second exhaust hole of the battery 2 is connected to the first air inlet of the heat dissipation device 1; when the power supply group includes several batteries 2, the several batteries 2 and the heat dissipation device 1 are connected through the above-mentioned pipe 3 having the main pipe 3b and the branch pipe 3a.

[0104] The heat dissipation device 1 and the cabinet 4 can be connected, for example, by welding, bonding, or by connecting a connection structure. The connection structure can be a buckle, a locking pin, a bolt, etc. In one example, a mounting plate is provided on the outer side of the shell of the heat dissipation structure, a first assembly hole is provided on the mounting plate, and a second assembly hole is provided on the cabinet 4. One of the first assembly hole and the second assembly hole can be a plain hole and the other can be a threaded hole. The bolt passes through the plain hole and is screwed into and locked in the threaded hole. Alternatively, both the first assembly hole and the second assembly hole are plain holes, and the bolt passes through the first assembly hole and the second assembly hole and is locked in the nut.

[0105] In some embodiments, the heat dissipation device 1 may not be connected to the cabinet 4 , and a baffle may be provided in the cabinet 4 to limit the heat dissipation device 1 .

[0106] After the combustible gas inside the battery 2 is discharged through the second exhaust port due to thermal runaway of the battery 2, the combustible gas enters the heat sink 1 through the first air inlet connected to the second exhaust port, and is discharged after the heat is dissipated by the heat sink 1. Since the heat sink 1 has a heat dissipation effect on the combustible gas, the potential safety hazard of the gas discharged through the first exhaust port can be reduced.

[0107] 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 aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned 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 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 the various embodiments 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 heat dissipation device, characterized in that: It includes a shell, an exhaust channel is arranged in the shell, and the shell has a first air inlet, a second air inlet and a first exhaust port; the first air inlet and the second air inlet are both connected to one end of the exhaust channel, and the first exhaust port is connected to the other end of the exhaust channel; the first air inlet is used for allowing the gas to be cooled to enter, the second air inlet is used for allowing the inert gas to enter, and the first exhaust port is used for discharging a mixed gas of the gas to be cooled and the inert gas.

2. The heat dissipation device according to claim 1, characterized in that: The exhaust channel includes a plurality of sub-channels distributed in sequence along a first direction. The extension direction of each sub-channel is arranged at an angle with the first direction, and adjacent sub-channels in the first direction are connected end to end.

3. The heat dissipation device according to claim 2, characterized in that: The shell has an inner cavity, and a plurality of first baffles are installed in the inner cavity. The plurality of first baffles divide the inner cavity into a plurality of sub-channels.

4. The heat dissipation device according to claim 2, characterized in that: A plurality of second baffles are arranged in the exhaust channel along the gas flow direction, and the plurality of second baffles divide each sub-channel into a plurality of sub-chambers. Along the gas flow direction, two adjacent sub-chambers are connected by a connecting port, and the heights of two adjacent connecting ports are not equal. The connecting port is arranged on the second baffle or between the second baffle and the outer shell.

5. The heat dissipation device according to claim 4, characterized in that: The first air inlet and the second air inlet are in communication with the same sub-chamber.

6. The heat dissipation device according to claim 4, characterized in that: The outer shell has a top plate and a bottom plate arranged opposite to each other in the height direction, the height of the second baffle plate is smaller than the distance between the top plate and the bottom plate, and among two adjacent second baffle plates, one of the second baffle plates is connected to the top plate and forms a connecting opening with the bottom plate, and the other second baffle plate is connected to the bottom plate and forms a connecting opening with the top plate.

7. The heat dissipation device according to any one of claims 1 to 6, characterized in that: At least a partial area in the exhaust channel is provided with a porous structure.

8. The heat dissipation device according to any one of claims 1 to 6, characterized in that: The first air inlet is installed with a flow sensor, and the second air inlet is installed with a solenoid valve, which is used to open when the airflow detected by the flow sensor reaches a flow threshold, so that the inert gas enters the exhaust channel through the second air inlet.

9. The heat dissipation device according to any one of claims 1 to 6, characterized in that: The first exhaust port is equipped with an explosion-proof valve, which is used to close the first exhaust port when the pressure in the exhaust channel is below a set value, and is used to open the first exhaust port when the pressure in the exhaust channel reaches the set value.

10. The heat dissipation device according to any one of claims 1 to 6, characterized in that: The bottom of the housing is provided with a liquid storage tank, and the liquid storage tank is used for storing condensed liquid.

11. An electrical device, characterized in that: The invention comprises a battery and the heat dissipation device according to any one of claims 1 to 10, wherein the battery has a second exhaust port, and the second exhaust port is connected to the first air inlet in the heat dissipation device.

Images