Cooling system, battery assembly and electric equipment

Abstract

The utility model discloses a cooling system, a battery assembly and electric equipment, the cooling system comprises: a baffle plate, which is arranged opposite to a battery explosion-proof valve; the connecting part is connected with the baffle, so that an exhaust channel is defined by the connecting part, the baffle and the battery together, and the exhaust channel is used for being opposite to a battery anti-explosion valve; at least one of the baffle and the connecting part is provided with a flow channel groove for circulation of cooling liquid. Therefore, the exhaust channel can cool the gas while the gas passes through the exhaust channel.

Description

Technical Field

[0001] The utility model relates to the technical field of thermal management, in particular to a cooling system, a battery assembly and an electrical device. Background Art

[0002] With the development of new energy, batteries are used more and more widely and are the heart of electrical equipment. Since batteries generate a lot of heat and the battery pack is in a relatively closed environment, the temperature of the battery will rise, which poses a huge safety hazard to the operation of electrical equipment. Therefore, the requirements for battery pack safety and rapid heat dissipation are getting higher and higher. The heat generated during battery use needs to be quickly exported to the outside of the battery pack, especially when the battery pack has thermal runaway, the high-temperature harmful gas needs to be quickly exported to the outside of the battery pack.

[0003] In the related art, the battery pack has the problem of emitting harmful high-temperature gas at a very high temperature during exhaust, which may cause accidental damage to people and property outside the electrical equipment. Utility Model Content

[0004] The utility model aims to solve at least one of the technical problems existing in the prior art. To this end, a cooling system designed according to the utility model can cool down the high-temperature gas during the process of the battery discharging harmful high-temperature gas.

[0005] The second objective of the present invention is to provide a battery assembly using the above cooling system.

[0006] The third object of the present utility model is to provide an electrical device, comprising the battery assembly as described above, wherein the battery assembly is used to supply power to the electrical device.

[0007] According to the first aspect of the utility model, the cooling system includes a baffle, which is used to be arranged opposite to the battery explosion-proof valve; a connecting part, which is connected to the baffle so that the connecting part, the baffle and the battery jointly enclose an exhaust channel, and the exhaust channel is used to be opposite to the battery explosion-proof valve; at least one of the baffle and the connecting part has a flow channel groove for the circulation of coolant.

[0008] According to the cooling system of the utility model, an exhaust channel is jointly enclosed by the baffle, the connecting part and the battery, and the battery explosion-proof valve is opposite to the exhaust channel, so that harmful high-temperature gases discharged through the explosion-proof valve when the battery is thermally runaway can enter the exhaust channel and be discharged. At the same time, the baffle and the battery explosion-proof valve are arranged relative to each other, so that the harmful high-temperature gases ejected from the battery explosion-proof valve can be blocked by the baffle when discharged, and will not run around in the battery pack to affect other devices. At the same time, at least one of the baffle and the connecting part that enclose the exhaust channel has a flow channel groove for the circulation of coolant, so that the exhaust channel also has a cooling function. When the harmful high-temperature gases discharged from the battery explosion-proof valve enter the exhaust channel, since the exhaust channel has a cooling flow channel with coolant flowing therein, the harmful high-temperature gases can be cooled synchronously during the discharge of the harmful high-temperature gases, so that the temperature of the gases is reduced when they are discharged, thereby reducing the impact on other devices in the battery pack and electrical equipment outside the battery pack.

[0009] In combination with the first aspect, in a first possible implementation manner of the first aspect of the utility model, optionally, the connecting portion is a flow channel plate, the flow channel plate is recessed away from the baffle to form a flow channel groove, the flow channel plate is fitted with the baffle, and the opening of the flow channel groove faces the baffle to form a cooling flow channel between the flow channel plate and the baffle.

[0010] In combination with the first aspect, in a second possible implementation manner of the first aspect of the utility model, optionally, the connecting portion is a cold pipe, and a cooling flow channel is formed inside the cold pipe.

[0011] In combination with the first aspect, in a third possible implementation manner of the first aspect of the utility model, optionally, a surface of at least one of the baffle and the connecting portion that forms the exhaust passage is provided with a heat insulation layer.

[0012] In combination with the first aspect, in a fourth possible implementation manner of the first aspect of the utility model, optionally, at least one cooling unit has a flow channel for cooling the battery cell.

[0013] In combination with the first aspect, in a fifth possible implementation manner of the first aspect of the utility model, optionally, the cooling system includes a water inlet pipe and a water outlet pipe, and the water inlet pipe and the water outlet pipe are connected to at least one of the baffle and the connecting part.

[0014] In combination with the fifth possible implementation manner of the first aspect, in the sixth possible implementation manner of the first aspect of the utility model, optionally, one end of at least one of the baffle and the connecting part is connected to the water inlet pipe, and the other end is connected to the collecting pipe; at least one cooling part, the cooling part has a flow channel for cooling the battery, one end of the cooling part is connected to the collecting pipe, and the other end is connected to the water outlet pipe.

[0015] In combination with the first aspect, in a first possible implementation manner of the second aspect of the utility model, optionally, the connecting portion includes a first connecting portion and a second connecting portion, and along a direction parallel to the first end face, the first connecting portion is used to be arranged on one side of the battery explosion-proof valve, and the second connecting portion is used to be arranged on the other side of the battery explosion-proof valve.

[0016] A second aspect of the present invention provides a battery assembly, including a battery cell, the battery cell including a first end face, and an explosion-proof valve is arranged on the first end face; as in any cooling system of the first aspect to the fifth possible implementation manner of the first aspect of the present invention, the baffle and the explosion-proof valve are arranged opposite to each other, and the connecting part is connected to the baffle and the battery cell, and jointly encloses an exhaust channel.

[0017] In combination with the second aspect, in a first possible implementation manner of the second aspect of the utility model, optionally, the battery cell includes a second end face provided with an electrical lead-out terminal, and the first end face and the second end face are different end faces of the battery cell.

[0018] In combination with the second aspect, in a second possible implementation manner of the second aspect of the utility model, optionally, the minimum distance between the baffle and the battery cell is in the range of 1 mm to 3 mm.

[0019] In combination with the second aspect, in a third possible implementation manner of the second aspect of the utility model, optionally, thermal conductive adhesive is used, and the first connecting portion and / or the second connecting portion is connected to the battery core through the thermal conductive adhesive.

[0020] In combination with the second aspect, in a fourth possible implementation manner of the second aspect of the utility model, optionally, a box body has an accommodating space, the accommodating space is used to accommodate the battery cell group and the cooling system, and the box body is provided with a pressure relief device for connecting the inside and outside of the box body when the air pressure in the box body reaches a threshold value.

[0021] In combination with the fourth possible implementation of the second aspect, in the fifth possible implementation of the second aspect of the utility model, optionally, the battery cell has a first end face and a second end face, the first end face is located at both ends of the battery cell along the second direction and is provided with an electrical lead-out terminal, the second end face is perpendicular to the first end face and is provided with an explosion-proof valve, and the second end faces of the multiple battery cells are extended and arranged along the first direction; the exhaust channel extends along the first direction, and the pressure relief device is located on one side of the exhaust channel along the first direction.

[0022] In combination with the fifth possible implementation manner of the second aspect, in a sixth possible implementation manner of the second aspect of the utility model, optionally, the pressure relief device is directly opposite to the exhaust passage.

[0023] In combination with the second aspect, in a seventh possible implementation manner of the second aspect of the utility model, optionally, an end plate is provided on at least one side of the multiple battery cells along the first direction, and the orthographic projection of the exhaust channel in the first direction at least partially exceeds the orthographic projection of the end plate in the first direction.

[0024] In combination with the seventh possible implementation manner of the second aspect, in an eighth possible implementation manner of the second aspect of the utility model, optionally, along the height direction of the battery cell, the height of the end plate is less than or equal to the height of the battery cell.

[0025] The third aspect of the present invention provides an electrical device, comprising the battery assembly provided by the second aspect of the present invention, wherein the battery assembly is used to supply power to the electrical device. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, 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 utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0027] Figure 1 It is a structural schematic diagram of an electrical device provided in an embodiment of the utility model;

[0028] Figure 2 It is a structural schematic diagram of a cooling system provided by an embodiment of the utility model;

[0029] Figure 3 It is a partial enlarged diagram of the structural schematic diagram of a cooling system provided by an embodiment of the utility model;

[0030] Figure 4 It is a structural schematic diagram of a cooling system provided by an embodiment of the utility model;

[0031] Figure 5 It is a structural schematic diagram of a battery provided in an embodiment of the utility model;

[0032] Figure 6 This is a schematic diagram of the battery assembly structure provided by an embodiment of the utility model;

[0033] Figure 7 It is a schematic diagram of the battery assembly structure provided by an embodiment of the utility model.

[0034] Reference numerals:

[0035] 1000-electrical equipment; 100-power system;

[0036] 200-battery assembly; 210-thermal conductive adhesive; 220-box; 221-pressure relief device; 230-end plate;

[0037] 300-battery; 310-first end surface; 311-explosion-proof valve; 320-second end surface; 321-electrical lead-out terminal;

[0038] 400-cooling system; 410-baffle; 420-connecting part; 421-flow channel; 422-first connecting part; 423-second connecting part; 430-cooling part; 440-water inlet pipe; 450-water outlet pipe; 460-collecting pipe; 470-exhaust channel. Implementation

[0039] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0040] Unless otherwise specifically stated, the relative arrangement, numerical expressions and numerical values ​​of the parts and steps described in these embodiments do not limit the scope of the utility model. At the same time, it should be understood that, for ease of description, the sizes of the various parts shown in the accompanying drawings are not drawn according to the actual proportional relationship. The technology, methods and equipment known to ordinary technicians in the relevant field may not be discussed in detail, but in appropriate cases, the technology, methods and equipment should be regarded as a part of the authorization specification. In all examples shown and discussed here, any specific value should be interpreted as merely exemplary, rather than as a limitation. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters represent similar items in the following drawings, so once a certain item is defined in one drawing, it does not need to be further discussed in subsequent drawings.

[0041] In the description of the present invention, it should be understood that the use of terms such as "first" and "second" to limit components is only for the convenience of distinguishing the corresponding components. Unless otherwise stated, the above terms have no special meaning and therefore cannot be understood as limiting the scope of protection of the present invention.

[0042] It should be noted that when a component is said to be "fixed to" another component, it can be directly on the other component or there can be a central component. When a component is said to be "connected to" another component, it can be directly connected to the other component or there can be a central component at the same time.

[0043] Unless otherwise defined, all technical and scientific terms used in the present invention have the same meaning as those generally understood by technicians in the technical field to which the present invention belongs. The terms used in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "and / or" used in the present invention includes any and all combinations of one or more related listed items. The "multiple" appearing in the present invention refers to more than two (including two), and 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 conjunction with the accompanying drawings, some embodiments of the present invention are described in detail below. In the absence of conflict, the following embodiments and features in the embodiments can be combined with each other.

[0045] See also Figure 1 , Figure 1 1 is a schematic diagram of the structure of a vehicle 1000 provided in an embodiment of the utility model. The vehicle 1000 includes a power system 100 and a battery assembly 200. The power system 100 and the battery assembly 200 are electrically connected. The battery assembly 200 provides a power source for the power system 100.

[0046] The embodiment of the utility model provides an electric device 1000, which can be a vehicle, a computer, a ship, a spacecraft, an electric two-wheeled vehicle, an electric multi-wheeled vehicle, an energy storage cabinet, an unmanned aerial vehicle, a notebook computer, an electric toy, etc. The electric device 1000 includes a battery assembly 200, and the battery assembly 200 is used to supply power to the electric device 1000.

[0047] The electric device 1000 of the embodiment of the utility model is illustrated by taking a vehicle as an example. Specifically, the electric device 1000 also includes a vehicle body, and the battery pack is installed on the vehicle body. In this embodiment, the vehicle body includes a chassis. The battery 300 is installed on the chassis.

[0048] See also Figure 1 , Figure 1 1 is a schematic diagram of the structure of a vehicle 1000 provided in an embodiment of the utility model. The vehicle 1000 includes a power system 100 and a battery assembly 200. The power system 100 and the battery assembly 200 are electrically connected. The battery assembly 200 provides a power source for the power system 100.

[0049] Vehicle 1000 includes, but is not limited to, a pure electric vehicle (Pure Electric Vehicle / Battery Electric Vehicle, PEV / BEV), a hybrid electric vehicle (HEV), a range extended electric vehicle (REEV), a plug-in hybrid electric vehicle (PHEV) or a new energy vehicle (New Energy Vehicle).

[0050] The battery assembly 200 may include a plurality of secondary batteries, such as nickel-metal hydride batteries, nickel-cadmium batteries, lead-acid (or lead storage) batteries, lithium-ion batteries, polymer lithium-ion batteries, etc. In other embodiments, the battery assembly 200 may also include a plurality of lithium-ion primary batteries, lithium-sulfur batteries, sodium-lithium-ion batteries or sodium-ion batteries or magnesium-ion batteries, etc.

[0051] It should be noted that the vehicle 1000 is only one usage scenario of the battery assembly 200 provided by the present invention. In other scenarios, the battery assembly 200 can also be used in other electronic devices or mechanical equipment, etc. The present invention does not specifically limit the usage scenario of the battery assembly 200.

[0052] See also Figure 2 and Figure 3 , Figure 2 This is a schematic diagram of the structure of a cooling system 400 provided in an embodiment of the present utility model. Figure 3 for Figure 2 A partial enlarged view of the structural schematic diagram of the cooling system 400 is shown.

[0053] An embodiment of the utility model provides a cooling system 400 for cooling a battery assembly 200. The cooling system 400 includes a baffle 410, which is used to be arranged opposite to the explosion-proof valve 311 of the battery 300; a connecting portion 420, which is connected to the baffle 410, so that the connecting portion 420, the baffle 410 and the battery 300 jointly enclose an exhaust channel 470, and the exhaust channel 470 is used to be opposite to the explosion-proof valve 311 of the battery 300; at least one of the baffle 410 and the connecting portion 420 has a flow channel 421 for the circulation of coolant.

[0054] According to the cooling system 400 of the utility model, the exhaust channel 470 is enclosed by the baffle 410, the connecting part 420 and the battery 300, and the explosion-proof valve 311 of the battery 300 is opposite to the exhaust channel 470, so that the harmful high-temperature gas discharged through the explosion-proof valve 311 when the battery 300 is thermally runaway can enter the exhaust channel 470 for discharge, and the baffle 410 and the explosion-proof valve 311 of the battery 300 are arranged opposite to each other, so that the harmful high-temperature gas ejected from the explosion-proof valve 311 of the battery 300 can be blocked by the baffle 410 when discharged, and will not run around in the battery 300 package to affect other devices. At the same time, at least one of the baffle 410 and the connecting part 420 that surround and form the exhaust channel 470 has a flow channel groove 421 for the coolant to flow, so that the exhaust channel 470 also has a cooling function. When the harmful high-temperature gas discharged from the explosion-proof valve 311 of the battery 300 enters the exhaust channel 470, since the exhaust channel 470 has a cooling flow channel with coolant flowing, the harmful high-temperature gas can be cooled simultaneously during the exhaust process of the harmful high-temperature gas, so that the temperature of the gas is reduced when it is discharged, reducing the impact on other devices in the battery 300 package and the electrical equipment 1000 outside the battery 300 package. In some embodiments of the utility model, the baffle 410 is provided with a flow channel groove 421, and the explosion-proof valve 311 of the battery 300 is directly opposite to the baffle 410, and the ejected high-temperature gas is directly blocked by the baffle 410. Since the baffle 410 is provided with a cooling flow channel, the cooling liquid in the flow channel can cool the high-temperature gas. In other embodiments of the present invention, a flow channel groove 421 is provided in the connection part 420. Since the baffle 410 is directly opposite to the explosion-proof valve 311, the baffle 410, the connection part 420, and the battery 300 are surrounded to form an exhaust channel 470. Therefore, in some embodiments, the connection part 420 is formed as the side wall of the exhaust channel 470, and the flow channel groove 421 is provided in the connection part 420, that is, the side wall of the exhaust channel 470 has a cooling function, which can make the high-temperature gas ejected from the explosion-proof valve 311 of the battery 300 gradually cooled by the side wall of the exhaust channel 470 during the discharge along the exhaust channel 470, so as to achieve the purpose of reducing the temperature of the gas when it is discharged. It can be understood that in other embodiments of the present invention, the flow channel groove 421 can be provided in both the baffle 410 and the connection part 420, so as to further improve the cooling capacity of the cooling system 400 for the high-temperature gas discharged from the explosion-proof valve 311 of the battery 300.

[0055] It can be understood that in some embodiments of the present invention, the connection part 420 can be a flow channel plate, the flow channel plate is recessed away from the baffle 410 to form a flow channel groove 421, the flow channel plate is attached to the baffle 410, and the opening of the flow channel groove 421 faces the baffle 410, so as to form a cooling flow channel between the flow channel plate and the baffle 410. Specifically, the baffle 410 can be a flat plate, and the connection part 420 is a single-layer flat plate recessed away from the baffle 410 to form a flow channel groove 421. After the connection part 420 and the baffle 410 are connected, the flow channel groove 421 formed by the recess on the connection part 420 opens toward the baffle 410, and the flow channel for the cooling liquid to flow is formed between the flow channel groove 421 and the baffle 410. The height of the flow channel groove 421 formed by the recess on the connection part 420 in the thickness direction of the connection part 420 is the height of the exhaust channel 470, and the flow channel groove 421 becomes the side wall of the exhaust channel 470, which simplifies the structure of the cooling system 400.

[0056] It can be understood that in some embodiments of the present invention, Figure 3 As shown, the connection part 420 may also be a cold pipe, and a cooling channel is formed inside the cold pipe. The cold pipe may be a hollow pipe, inside which the cooling liquid flows, or it may be a harmonica tube, which is light in weight and has a relatively high surface flatness. As a result, it can better fit with the top of the battery 300, thereby having the advantage of further improving the heat exchange efficiency. Specifically, the harmonica tube can be processed by extrusion molding, and the multiple reinforcing ribs inside the harmonica tube can not only divide the interior of the connection part 420 into multiple heat exchange channels, but also improve the structural strength of the cooling system 400, and prevent the cooling system 400 from being deformed when squeezed.

[0057] It can be understood that in some embodiments of the present invention, at least one of the baffle 410 and the connecting portion 420 forms a surface of the exhaust channel 470 and is provided with a heat insulation layer, that is, a heat insulation layer is provided on the side wall of the exhaust channel 470. In some embodiments, the baffle 410 forms the top wall of the exhaust channel 470, and the surface of the baffle 410 facing the explosion-proof valve 311 is the top wall surface of the exhaust channel 470. The connecting portion 420 has a first connecting portion 422 and a second connecting portion 423. The first connecting portion 422 is arranged on one side of the battery explosion-proof valve, and the second connecting portion 423 is arranged on the other side of the battery explosion-proof valve. The first connecting portion 422 and the second connecting portion 423 form the side wall of the exhaust channel 470, and the two opposite surfaces of the first connecting portion 422 and the second connecting portion 424 are the side wall surfaces of the exhaust channel 470. In some embodiments, at least one of the surface of the baffle 410 facing the explosion-proof valve 311 and the two opposite surfaces of the first connecting portion 422 and the second connecting portion 423 is provided with a heat insulation layer. The heat-insulating layer is made of high-temperature resistant material. Since the temperature of the gas ejected from the explosion-proof valve 311 of the battery 300 is relatively high, the heat-insulating layer is made of high-temperature resistant insulating material. It is understandable that the high-temperature resistant material can be ceramic and its composite material, mica and its composite material, glass fiber and its composite material, polyphenylene sulfide and its composite material, liquid crystal polymer and its composite material or fusible polytetrafluoroethylene and its composite material. It is understandable that in addition to the materials listed above, other materials with high temperature resistance can also be used. Although the present utility model does not list them one by one, it should be understood that they all belong to the protection scope of this application. By setting a heat-insulating layer on the surface of at least one of the baffle 410 and the connecting part 420 that forms the exhaust channel 470, it is prevented that the high-temperature gas ejected from the explosion-proof valve 311 affects other components and causes further damage.

[0058] Further, in some embodiments, a heat-insulating layer is provided on the surface of at least one of the baffle 410 and the connecting portion 420 that forms the exhaust channel 470, such as ceramic and its composite materials, phenolic resin and its composite materials, polyimide and its composite materials, polytetrafluoroethylene and its composite materials, polyoxymethylene and its composite materials, polyetheretherketone and its composite materials, mica and its composite materials, etc. The specific materials used can be adjusted according to the use occasion of the battery 300. An insulating layer is provided on the surface of at least one of the baffle 410 and the connecting portion 420 that faces the explosion-proof valve 311 of the battery 300, that is, an insulating layer is provided on at least one side wall of the exhaust channel 470 that faces the explosion-proof valve 311 of the battery 300, which can prevent the temperature of the high-temperature gas ejected from the battery 300 from affecting other components, and avoid arcing, which affects the safety of the battery 300. It can be understood that in some embodiments, an insulating and heat-insulating layer is provided on the baffle 410 to avoid the high temperature and arcing caused by direct gas injection. In other embodiments, an insulating and heat-insulating layer is provided on the surface of the connecting portion 420 facing the explosion-proof valve 311 of the battery 300 to avoid the high temperature and arcing caused by gas diffusion to the side. In some other embodiments, insulating and heat-insulating layers are provided on the surfaces of the baffle 410 and the connecting portion 420 facing the explosion-proof valve 311 of the battery 300 to further improve the insulating and heat-insulating effects.

[0059] Please continue to refer to Figure 2 It is understandable that in some embodiments of the present invention, the cooling system 400 is further provided with at least one cooling part 430, and the cooling part 430 has a flow channel for cooling the battery 300. The cooling system 400 is further provided with at least one cooling part 430 in addition to the baffle 410 and the connecting part 420. The cooling part 430 can be arranged on one side of the connecting part 420, or on both sides of the connecting part 420. When applied to the battery assembly 200, the cooling part 430 can be used to fit with the battery 300 to cool the battery 300. It is understandable that the cooling part 430 can be a flat flow channel plate formed by stamping and brazing, or a harmonica pipe, etc., as long as it has a cooling flow channel, and the present invention does not limit this.

[0060] Please refer to Figure 4It can be understood that in some embodiments of the present invention, the cooling system 400 includes a water inlet pipe 440 and a water outlet pipe 450, and the water inlet pipe 440 and the water outlet pipe 450 are connected to at least one of the baffle 410 and the connecting portion 420. The cooling system 400 is fed with water through the water inlet pipe 440, flows through at least one of the baffle 410 and the connecting portion 420, and then flows out of the cooling system 400 through the water outlet pipe 450. The water inlet pipe 440 and the water outlet pipe 450 are connected to at least one of the baffle 410 and the connecting portion 420 to ensure that the coolant can flow in the cooling system 400. It can be understood that according to different flow directions of the coolant in different embodiments, the "water inlet pipe 440" and "water outlet pipe 450" used in the text of the present invention are only used for distinction, and are not used as a limitation on the inflow and outflow direction of the coolant. The coolant can also flow in from the water outlet pipe 450 and flow out from the water inlet pipe 440, and the present invention does not limit this.

[0061] Further, it can be understood that in some embodiments of the present invention, please continue to refer to FIG. 4, the cooling system 400 also includes a header 460, one end of at least one of the baffle 410 and the connecting part 420 is connected to the water inlet pipe 440, and the other end is connected to the header 460; one end of the cooling part 430 is connected to the header 460, and the other end is connected to the water outlet pipe 450. That is, one end of the header 460 is connected to at least one of the baffle 410 and the connecting part 420, and is used to collect the coolant flowing into at least one of the baffle 410 and the connecting part 420, and the other end is connected to the cooling part 430 to inject the coolant into the cooling part 430. It can be understood that in different embodiments, according to different flow directions of the coolant, the cooling system 400 can also be set so that the coolant flows from the cooling part 430 into the header 460, and then flows from the header 460 into at least one of the baffle 410 and the connecting part 420, and the present invention does not limit this. In some embodiments, the coolant enters the cooling system 400 from the water inlet pipe 440, flows into the manifold 460 through at least one of the baffle 410 and the connecting portion 420, flows into the cooling portion 430 through the manifold 460, flows to the water outlet pipe 450 through the cooling portion 430, and then flows out of the cooling system 400, wherein the flow direction of the coolant in at least one of the baffle 410 and the connecting portion 420 is opposite to the flow direction in the cooling portion 430, and the flow channel is in a tortuous bend shape, which is conducive to saving space in the cooling system 400. It can be understood that in some embodiments, the cooling system 400 can have a plurality of cooling portions 430, which are respectively located on both sides of the baffle 410 and the connecting portion 420, and the manifold 460 has a diversion flow channel, and the coolant flows out of the baffle 410 and / or the connecting portion 420 and flows to the cooling portions 430 on both sides through the diversion flow channels that are angled with each other. In some embodiments, the cooling system 400 has two cooling parts 430, which are respectively located on both sides of the baffle 410 and the connecting part 420, and the manifold 460 has two branch flow channels in opposite directions, which are respectively connected to the cooling parts 430 on both sides of the baffle 410 and the connecting part 420.

[0062] In some embodiments, please refer to Figure 3The connection part 420 includes a first connection part 422 and a second connection part 423. In a direction parallel to the first end face 310, the first connection part 422 is located on one side of the explosion-proof valve 311, and the second connection part 423 is located on the other side of the explosion-proof valve 311. The explosion-proof valve 311 is arranged on the first end face 310, and the first connection part 422 and the second connection part 423 are arranged on both sides of the explosion-proof valve 311, and the first connection part 422 and the second connection part 423 are connected to the baffle 410. Since the first connection part 422 and the second connection part 423 have a certain height, the three of them enclose an exhaust channel 470 above the explosion-proof valve 311, and the height of the first connection part 422 and the second connection part 423 in a direction perpendicular to the first end face 310 is the height of the exhaust channel 470. It can be understood that the first connection portion 422 and the second connection portion 423 can be directly connected to the first end surface 310 of the battery 300, or can be indirectly connected to the first end surface 310 through other structural members. In some embodiments, the first connection portion 422 and the second connection portion 423 have the same height in a direction perpendicular to the first end surface 310. In other embodiments, the heights of the first connection portion 422 and the second connection portion 423 may also be different. The higher one of the first connection portion 422 and the second connection portion 423 can be directly connected to the battery 300, and the lower one can be connected to the battery 300 through other structural members. The heights of the two can also be different. The baffle 410 is not parallel to the first end surface 310 of the battery 300. The utility model does not impose any restrictions on this. It only requires that the first connection portion 422 and the second connection portion 423 are located on both sides of the explosion-proof valve 311, and together with the baffle 410 and the battery 300, an exhaust channel 470 is enclosed.

[0063] The utility model also provides a battery assembly 200, see Figure 5-Figure 7 The battery assembly 200 may be a battery 300 module or a battery 300 pack, including a battery 300, wherein the battery 300 includes a first end surface 310, and an explosion-proof valve 311 is disposed on the first end surface 310; as in the cooling system 400 in any of the aforementioned embodiments, the baffle 410 of the cooling system 400 is disposed opposite to the explosion-proof valve 311 of the battery 300, and the connecting portion 420 is connected to the battery 300, and an exhaust passage 470 is enclosed together. By providing a cooling system 400 in the battery assembly 200, the harm of the high-temperature gas released when the battery assembly 200 is in thermal runaway to the battery assembly 200 and the electrical equipment 1000 using the battery assembly 200 can be reduced, and the released high-temperature gas can be cooled. At the same time, the connecting part 420 is connected to the battery 300. In some embodiments, a flow channel groove 421 is provided in the connecting part 420, and the connecting part 420 and the battery 300 are directly connected. By connecting the connecting part 420 and the battery 300, the battery 300 can be cooled, thereby enhancing the temperature management of the battery assembly 200.

[0064] In some embodiments, see Figure 5-Figure 7 The battery 300 includes a second end face 320 provided with an electrical lead-out terminal 321. The first end face 310 and the second end face 320 are different end faces of the battery 300, that is, the electrical lead-out terminal 321 of the battery 300 and the explosion-proof valve 311 are not on the same end face. The electrical lead-out terminal 321 of the battery 300 is the position where the current of the battery 300 is led out. It can be led out through a conductive member such as a pole, or it can be directly led out by the battery 300 shell. By arranging the electrical lead-out terminal 321 and the explosion-proof valve 311 on different end faces of the battery 300, it is not easy to affect the electrical lead-out terminal 321 when the explosion-proof valve 311 sprays high-temperature gas, causing safety problems such as arcing. In some embodiments, the explosion-proof valve 311 is isolated from other end faces of the battery 300 through the first connection part 422 and the second connection part 423 on both sides of the explosion-proof valve 311, which further prevents the high-temperature gas from affecting the electrical lead-out terminal 321.

[0065] In some embodiments, the minimum distance between the baffle 410 and the battery 300 ranges from 1mm to 3mm. The baffle 410 is opposite to the explosion-proof valve 311. As a component that directly bears the high-temperature gas injection from the explosion-proof valve 311, it is necessary to maintain a certain distance from the first end face 310 on which the explosion-proof valve 311 is provided to avoid damage to the battery assembly 200 caused by blockage of high-temperature gas or excessive pressure. The appropriate distance is 1mm-3mm. If it is too far, the risk of high-temperature gas spilling in other directions will increase, which is not conducive to improving the energy density of the battery assembly 200.

[0066] In some embodiments, the battery assembly 200 also includes a thermally conductive adhesive 210, and the first connection part 422 and / or the second connection part 423 are connected to the battery 300 via the thermally conductive adhesive 210, so that heat can be quickly transferred from the battery 300 to the first connection part 422 and / or the second connection part 423, thereby achieving rapid cooling of the battery 300 and reducing the impact of thermal runaway.

[0067] In some embodiments, see Figure 5-Figure 7 The battery assembly 200 further includes a box 220, which has a storage space for accommodating the battery 300 group and the cooling system 400. The box 220 is provided with a pressure relief device 221, which is used to connect the inside and outside of the box 220 when the air pressure in the box 220 reaches a threshold. Therefore, the gas ejected from the explosion-proof valve 311 of the battery 300 can eventually be discharged to the outside of the battery assembly 200 through the pressure relief device 221, avoiding affecting other batteries 300 and devices in the battery assembly 200 that are not in thermal runaway.

[0068] In some embodiments, the battery 300 has a first end face 310 and a second end face 320. The second end face 320 is located at both ends of the battery 300 along the second direction and is provided with an electrical lead-out terminal 321. The first end face 310 is perpendicular to the second end face 320 and is provided with the explosion-proof valve 311. The first end faces 310 of multiple batteries 300 are arranged and extended along the first direction; the exhaust channel 470 extends along the first direction, and the pressure relief device 221 is located on one side of the exhaust channel 470 along the first direction. The first direction can be the width direction of the battery assembly 200 or the length direction of the battery assembly 200. The second direction is perpendicular to the first direction. When the first direction is the width direction of the battery assembly 200, the second direction is the length direction of the battery assembly 200. When the first direction is the length direction of the battery assembly 200, the first direction is the width direction of the battery assembly 200. Please refer to Figure 6 By extending and arranging the first end face 310 and the exhaust channel 470 in the first direction, the explosion-proof valves 311 of the multiple batteries 300 can be opposite to the baffle 410, and the gases released by the explosion-proof valves 311 of the multiple batteries 300 can be discharged along the first direction through the exhaust channel 470. At the same time, by placing the pressure relief device 221 on one side of the exhaust channel 470 along the first direction, the gas discharged from the explosion-proof valve 311 can quickly reach the pressure relief device 221 when being discharged along the first direction through the exhaust channel 470, thereby shortening the discharge path of the high-temperature gas, reducing the influence of the high-temperature gas on other batteries 300 and devices in the battery assembly 200, increasing the speed of discharging the high-temperature gas, and further improving the safety factor of the battery assembly 200.

[0069] Further, in some embodiments, please refer to Figure 7 The pressure relief device 221 is directly opposite to the exhaust channel 470, that is, the positive projections of the pressure relief device 221 and the exhaust channel 470 in the first direction at least partially overlap, which further shortens the exhaust path of the high-temperature gas, increases the exhaust speed, and increases the safety of the battery assembly 200.

[0070] In some embodiments, the battery assembly 200 may also be provided with an end plate 230 for fixing the plurality of batteries 300. Along the first direction, at least one side of the plurality of batteries 300 is provided with an end plate 230, and the orthographic projection of the exhaust channel 470 in the first direction at least partially exceeds the orthographic projection of the end plate 230 in the first direction, that is, the end plate 230 cannot completely block the exhaust channel 470 in the first direction, so as to avoid blocking the discharge of gas due to the provision of the end plate 230. It can be understood that in some embodiments, along the height direction of the battery 300, the height of the end plate 230 is less than or equal to the height of the battery 300. Since the exhaust channel 470 is formed by the baffle 410, the connecting portion 420 and the battery 300, the first end face 310 of the battery 300 is the bottom wall of the exhaust channel 470. When the height of the end plate 230 is less than or equal to the height of the battery 300, the end plate 230 does not block the exhaust channel 470 at all, so that the gas can be discharged smoothly along the first direction. When the battery assembly 200 is provided with multiple batteries 300, the battery 300 can be fixed by the end plate 230 without affecting the discharge of high-temperature gas due to the end plate 230.

[0071] The utility model further provides an electric device 1000, comprising the battery assembly 200 described in any one of the above embodiments, and the battery assembly 200 is used to supply power to the electric device 1000.

[0072] Other structures and operations of the cooling system 400, the battery assembly 200, and the electrical device 1000 according to the embodiment of the utility model are known to those skilled in the art and will not be described in detail here.

[0073] The above disclosure is only a preferred embodiment of the present invention, and certainly cannot be used to limit the scope of rights of the present invention. Ordinary technicians in this field can understand that all or part of the processes of the above embodiments and equivalent changes made according to the claims of the present invention still fall within the scope covered by the present invention.

Claims

1. A cooling system, characterized in that: include: a baffle, the baffle being arranged opposite to the battery explosion-proof valve; A connecting portion, the connecting portion being connected to the baffle plate, so that the connecting portion, the baffle plate and the battery together enclose an exhaust passage, and the exhaust passage is used to be opposite to the battery explosion-proof valve; At least one of the baffle and the connecting portion has a flow channel groove for cooling liquid to flow.

2. The cooling system according to claim 1, characterized in that: The connecting part is a flow channel plate, the flow channel plate is recessed away from the baffle to form a flow channel groove, the flow channel plate is fitted with the baffle, and the opening of the flow channel groove faces the baffle to form a cooling flow channel between the flow channel plate and the baffle.

3. The cooling system according to claim 1, characterized in that: The connecting part is a cold pipe, and a flow channel groove is formed inside the cold pipe.

4. The cooling system according to claim 1, characterized in that: A heat insulating layer is formed on a surface of at least one of the baffle plate and the connection portion that forms the exhaust passage.

5. The cooling system according to claim 1, characterized in that: Also includes: At least one cooling unit has a flow channel for cooling the battery.

6. The cooling system according to claim 1, characterized in that: The cooling system includes a water inlet pipe and a water outlet pipe, and the water inlet pipe and the water outlet pipe are in communication with at least one of the baffle and the connecting portion.

7. The cooling system according to claim 6, characterized in that: The cooling system further comprises a header, One end of at least one of the baffle and the connecting portion is connected to the water inlet pipe, and the other end is connected to the collecting pipe; At least one cooling part, the cooling part has a flow channel for cooling the battery, one end of the cooling part is connected to the collecting pipe, and the other end is connected to the water outlet pipe.

8. A battery assembly, characterized in that: include: A battery, the battery comprising a first end surface, the first end surface being provided with an explosion-proof valve; According to the cooling system as described in any one of claims 1 to 7, the baffle is arranged opposite to the explosion-proof valve, the connecting portion is connected to the battery, and together they enclose the exhaust channel.

9. The battery assembly according to claim 8, characterized in that: The connecting portion includes a first connecting portion and a second connecting portion. Along a direction parallel to the first end surface, the first connecting portion is used to be arranged on one side of the battery explosion-proof valve, and the second connecting portion is used to be arranged on the other side of the battery explosion-proof valve.

10. The battery assembly according to claim 8, characterized in that: The battery comprises a second end face provided with an electrical lead-out terminal, and the first end face and the second end face are different end faces of the battery.

11. The battery assembly according to claim 8, characterized in that: The minimum distance between the baffle and the first end surface ranges from 1 mm to 3 mm.

12. The battery assembly according to claim 9, characterized in that: include: Thermally conductive adhesive, the first connecting portion and / or the second connecting portion is connected to the battery via the thermally conductive adhesive.

13. The battery assembly according to claim 8, characterized in that: include: The box body has a containing space, the containing space is used to contain the battery and the cooling system, and the box body is provided with a pressure relief device for connecting the inside and outside of the box body when the air pressure in the box body reaches a threshold value.

14. The battery assembly according to claim 13, characterized in that: The battery has a first end face and a second end face, the second end faces are located at two ends of the battery along the second direction and are provided with electrical lead-out terminals, the first end face is perpendicular to the second end face and is provided with the explosion-proof valve, and the first end faces of the plurality of batteries are arranged extending along the first direction; The exhaust passage extends along a first direction, and the pressure relief device is located at one side of the exhaust passage along the first direction.

15. The battery assembly according to claim 14, characterized in that: The pressure relief device is directly opposite to the exhaust passage.

16. The battery assembly according to claim 14, characterized in that: Along the first direction, at least one side of the plurality of batteries is provided with an end plate, and an orthographic projection of the exhaust channel in the first direction at least partially exceeds an orthographic projection of the end plate in the first direction.

17. The battery assembly according to claim 16, characterized in that: Along the height direction of the battery, the height of the end plate is less than or equal to the height of the battery.

18. An electrical equipment, characterized in that: It comprises a battery assembly as described in any one of claims 8 to 17, wherein the battery assembly is used to supply power to the electrical device.

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