Liquid cooling pipeline, battery pack and vehicle

Abstract

The utility model relates to the technical field of new energy automobiles, and discloses a liquid cooling pipeline, a battery pack and a vehicle. The liquid cooling pipeline is provided with a cooling liquid flow channel and an emergency spraying opening which are communicated with each other, cooling liquid is arranged in the cooling liquid flow channel, the emergency spraying opening is blocked by a hot melting structure, and the melting point of the hot melting structure is higher than the temperature of the cooling liquid and lower than the temperature of eruption objects sprayed out of the anti-explosion valve. When the battery cell works normally, the liquid cooling pipeline plays a role in cooling the battery cell, and when the battery cell is out of control, an eruption substance of the anti-explosion valve melts the hot melting structure, so that the cooling liquid in the cooling liquid flow channel enters the out-of-control battery cell through the emergency spraying opening and the anti-explosion valve, rapid fire extinguishing and cooling are carried out, the loss of thermal runaway is reduced, the diffusion of thermal runaway is effectively prevented, and the service life of the battery cell is prolonged. And the safety of the battery pack and the vehicle is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to new energy automobile technical field especially, relates to a liquid cooling pipeline, battery pack and vehicle. BACKGROUND

[0002] New energy automobile has gradually walked into the public vision, and application range also gradually promotes, and the battery pack as the power source of new energy automobile, plays the important role without doubt. The safety of battery pack is paid more and more attention in recent years. The battery pack technology develops unceasingly, and the battery pack safety is paid more and more attention. The battery cell as the basic component unit of battery pack, when some battery cells in the battery pack heat runaway, a large amount of high-temperature and high-pressure gas even flame will be produced in the battery cell, and when the high-temperature and high-pressure gas and flame spread to other battery cells, will cause other battery cells heat runaway.

[0003] In order to realize more efficient cooling, and reduce the risk of heat runaway, the common measure at present is to increase the cooling pipeline on the top of battery cell on the basis of the liquid cooling pipeline at the bottom of battery cell. However, the existing top cooling pipeline only cools and lowers the temperature of battery cell, and when heat runaway occurs, the cooling and lowering temperature effect of top cooling pipeline is very small, and cannot effectively prevent the spread of heat runaway. SUMMARY

[0004] Based on the above problems, the purpose of the utility model is to provide a liquid cooling pipeline, battery pack and vehicle, which can effectively prevent the spread of heat runaway and improve the safety of battery pack and vehicle.

[0005] To achieve the above purpose, the following technical scheme is provided:

[0006] In a first aspect, the utility model provides a liquid cooling pipeline, which is provided with a cooling liquid flow channel and an emergency spray port in communication, a cooling liquid is arranged in the cooling liquid flow channel, the emergency spray port is blocked with a hot melting structure, the melting point of the hot melting structure is higher than the temperature of the cooling liquid, and lower than the temperature of the spray material sprayed by the explosion-proof valve.

[0007] As an optional scheme of the liquid cooling pipeline provided by the utility model, the emergency spray port is a hole structure and is distributed in a dot matrix in the liquid cooling pipeline, and / or the emergency spray port is a linear slot structure and extends along the length direction of the liquid cooling pipeline.

[0008] As an optional scheme of the liquid cooling pipeline provided by the utility model, the hot melting structure is a plastic structure or a metal structure.

[0009] As an optional scheme of the liquid cooling pipeline provided by the utility model, the spacing range between the hot melting structure and the explosion-proof valve is 3mm to 30mm.

[0010] The utility model provides a battery pack, including battery module and above -mentioned liquid cooling pipeline.

[0011] As an optional scheme of the battery pack provided by the utility model, the width of the hot melting structure is greater than the width of the explosion-proof valve, the distance by which the boundary of the hot melting structure exceeds the boundary of the explosion-proof valve is a first distance, and the value range of the first distance is 0 to 30 mm.

[0012] As an optional scheme of the battery pack provided by the utility model, the value range of the first distance is 3 mm to 5 mm.

[0013] As an optional scheme of the battery pack provided by the utility model, the width of the hot melting structure is less than the width of the explosion-proof valve, the distance by which the boundary of the explosion-proof valve exceeds the boundary of the hot melting structure is a second distance, and the value range of the second distance is 0 to 30 mm.

[0014] As an optional scheme of the battery pack provided by the utility model, a plurality of reinforcing ribs are arranged in the liquid cooling pipeline, the reinforcing ribs separate the inner cavity of the liquid cooling pipeline to form the cooling liquid flow channel, the inclination angle of the reinforcing ribs ranges from 10 to 90 degrees, the thickness of the reinforcing ribs ranges from 0.1 to 5 mm, and the distance between two adjacent reinforcing ribs ranges from 2 to 20 mm.

[0015] The utility model provides a battery pack, including battery module and above -mentioned liquid cooling pipeline.

[0016] The utility model has the advantages of:

[0017] The liquid cooling pipeline, the battery pack and the vehicle provided by the utility model have the emergency spraying opening communicated with the cooling liquid flow channel on the liquid cooling pipeline, and the hot melting structure is pre-sealed in the emergency spraying opening. Since the melting point of the hot melting structure is higher than the temperature of the cooling liquid, the liquid cooling pipeline cools the battery cell when the battery cell works normally. Since the melting point of the hot melting structure is lower than the temperature of the spray material sprayed by the explosion-proof valve, when the battery cell loses control, the spray material of the explosion-proof valve melts the hot melting structure, so that the cooling liquid in the cooling liquid flow channel enters the inside of the battery cell losing control through the emergency spraying opening and the explosion-proof valve, and rapid fire extinguishing and cooling are performed, the loss of thermal runaway is reduced, the spread of thermal runaway is effectively prevented, and the safety of the battery pack and the vehicle is improved. BRIEF DESCRIPTION OF DRAWINGS

[0018] In order to more clearly illustrate the technical scheme in the embodiments of the present utility model, the drawings needed to be used in the following description of the embodiments of the present utility model will be briefly introduced, obviously, the drawings in the following description are only some embodiments of the present utility model, and other drawings can also be obtained according to the contents of the embodiments of the present utility model and these drawings for the ordinary skilled in the art without any creative effort.

[0019] Figure 1 It is the explosion schematic view of the battery pack provided by the embodiment of the present utility model and comprising the liquid cooling pipeline;

[0020] Figure 2 It is the structural schematic view of the liquid cooling pipeline provided by the embodiment of the present utility model;

[0021] Figure 3 It is the cross-sectional schematic view of the liquid cooling pipeline and the battery cell provided by the embodiment of the present utility model;

[0022] Figure 4 It is the local structural schematic view of the harmonica tube provided by the embodiment of the present utility model, wherein the emergency spray mouth is the wire slot structure and extends along the length direction of the liquid cooling pipeline;

[0023] Figure 5 It is the local structural schematic view of the harmonica tube provided by the embodiment of the present utility model, wherein the emergency spray mouth is the hole structure and is distributed in the liquid cooling pipeline in the dot matrix;

[0024] Figure 6 It is the cross-sectional schematic view of the harmonica tube and the battery cell provided by the embodiment of the present utility model;

[0025] Figure 7 It is the top view schematic view of the harmonica tube and the battery cell provided by the embodiment of the present utility model, wherein the emergency spray mouth is the hole structure and is distributed in the liquid cooling pipeline in the dot matrix;

[0026] Figure 8 It is the top view schematic view of the harmonica tube and the battery cell provided by the embodiment of the present utility model, wherein the emergency spray mouth is the wire slot structure and extends along the length direction of the liquid cooling pipeline;

[0027] Figure 9 It is the cross-sectional schematic view of the local structure of the harmonica tube provided by the embodiment of the present utility model, wherein the hot melting structure is arranged in the emergency spray mouth by the integral extrusion mode;

[0028] Figure 10 It is the cross-sectional schematic view of the local structure of the harmonica tube provided by the embodiment of the present utility model, wherein the hot melting structure is arranged in the emergency spray mouth by the local potting mode;

[0029] Figure 11 is a sectional view schematic diagram of the partial structure of the harmonica tube provided by the embodiment of the utility model, wherein, the hot melting structure is arranged in the emergency spray mouth in a clamping mode.

[0030] In the figure:

[0031] 1, liquid cooling pipeline; 2, battery connection system; 3, battery module; 4, bottom liquid cooling assembly;

[0032] 11, harmonica tube; 12, current collector; 13, water pipe; 14, hot melting structure;

[0033] 111, reinforcing rib; 112, structural adhesive; 113, emergency spray mouth; 114, cooling liquid flow channel;

[0034] 121, inlet; 122, outlet;

[0035] 31, cell; 32, large surface heat insulation material; 33, side surface heat insulation material; 34, end insulation plate;

[0036] 311, explosion-proof valve. DETAILED DESCRIPTION

[0037] In order to make the technical problems solved by the utility model, the technical scheme adopted and the technical effects reached more clear, the technical scheme of the embodiment of the utility model will be further described in detail below in combination with the drawings. Obviously, the described embodiment is only a part of the embodiments of the utility model, not all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by the person skilled in the art without creative labor belong to the scope of protection of the utility model.

[0038] In the description of the utility model, it should be pointed out that the orientation or position relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" and the like is the orientation or position relationship shown based on the drawings, and is only for the convenience of describing the utility model and simplifying the description, and does not indicate or imply that the indicated device or element must have a particular orientation, be constructed and operated in a particular orientation, therefore, it cannot be understood as a limitation on the utility model. In addition, the terms "first", "second" are only for the purpose of description, and cannot be understood as indicating or implying relative importance. Among them, the terms "first position" and "second position" are two different positions.

[0039] In the description of the utility model, it is necessary to explain that, unless there is definite stipulation and limitation, the term "installation", "connection" should be broad sense understanding, for example, can be fixed connection, also can be detachable connection, can be mechanical connection, also can be electrical connection, can be direct connection, also can be indirectly connected through intermediate medium, can be two element internal communication. For ordinary skilled in the art, the above-mentioned term can be understood in the utility model with specific meaning.

[0040] As Figures 1 to 11 The utility model provides a kind of liquid cooling pipeline 1, which is provided with cooling liquid flow channel 114 and emergency sprinkling port 113, cooling liquid flow channel 114 is provided with cooling liquid, emergency sprinkling port 113 is blocked with hot melt structure 14, the melting point of hot melt structure 14 is higher than the temperature of cooling liquid, and lower than the temperature of the eruption of explosion-proof valve 311. It can be understood that the eruption of explosion-proof valve 311 includes gas eruption, liquid eruption, solid eruption and the mixture of the above two or three eruptions. For example, the eruption of explosion-proof valve 311 can be only high-temperature gas, or a mixture of high-temperature gas and high-temperature liquid.

[0041] Emergency sprinkling port 113 is provided on liquid cooling pipeline 1 and communicated with cooling liquid flow channel 114, and hot melt structure 14 is pre-blocked in emergency sprinkling port 113. Since the melting point of hot melt structure 14 is higher than the temperature of cooling liquid, liquid cooling pipeline 1 plays a role in cooling the battery cell 31 when the battery cell 31 is working normally. Since the melting point of hot melt structure 14 is lower than the temperature of the eruption of explosion-proof valve 311, when the battery cell 31 loses control, the eruption of explosion-proof valve 311 melts the hot melt structure 14, so that the cooling liquid in the cooling liquid flow channel 114 enters the inside of the out-of-control battery cell 31 through the emergency sprinkling port 113 and the explosion-proof valve 311, performs rapid fire extinguishing and cooling, reduces the loss of thermal runaway, effectively prevents the spread of thermal runaway, and improves the safety of the battery pack and the vehicle.

[0042] Emergency sprinkling port 113 can be located above the explosion-proof valve 311 of the battery cell 31. After the hot melt structure 14 melts, the cooling liquid in the cooling liquid flow channel 114 enters the inside of the out-of-control battery cell 31 through the emergency sprinkling port 113 and the explosion-proof valve 311 under the action of gravity, performs rapid fire extinguishing and cooling, and has low requirements for the flow rate and pressure of the cooling liquid.

[0043] Optionally, the emergency spray port 113 is a hole structure and is distributed in a lattice on the liquid cooling pipe 1; and / or, the emergency spray port 113 is a linear slot structure and extends along the length direction of the liquid cooling pipe 1. When the emergency spray port 113 is distributed in a lattice, more accurate cooling can be achieved by directly opening the hole to face the battery cell 31. When the emergency spray port 113 is a linear slot structure, two materials can be added in the extrusion channel to achieve the scheme by one-time extrusion. The process of this scheme is more convenient, and the production efficiency is higher.

[0044] Optionally, the heat melting structure 14 is a plastic structure or a metal structure. The heat melting structure 14 can be made of common plastic (such as PU), plastic (such as PE, PP, PVC, PS, ABS, PMMA, POM, PC, PA, etc.), or glue (such as ethylene acetate, ethylene polymer, etc.), or other components can be used to assist the sealing and bonding of the liquid cooling pipe 1 body, such as a glue plug fixed hard base, a metal baffle (strength) separated from the liquid cooling pipe 1 body, etc. The common connection methods of the heat melting structure 14 and the emergency spray port 113 include integral extrusion, local potting, clamping, etc. The heat melting structure 14 can be made of a metal with a relatively low melting point, such as aluminum, tin, or tin alloy. Tin is a low-melting-point metal (melting point of 232°C) with a silver-white luster and strong ductility at room temperature. Tin alloy is an alloy formed by adding other elements to tin. Common alloy elements include lead, antimony, copper, etc. Tin alloy has the characteristics of low melting point, low strength and hardness, high thermal conductivity, and low thermal expansion coefficient, etc.

[0045] To improve the structural strength of the liquid cooling pipe 1, a plurality of reinforcing ribs 111 are arranged in the liquid cooling pipe 1, and the reinforcing ribs 111 separate the inner cavity of the liquid cooling pipe 1 to form cooling liquid flow channels 114. The cooling liquid flow channel 114 can be a serpentine flow channel, which only needs one liquid inlet and one liquid outlet, thereby reducing the structural complexity.

[0046] In some embodiments, the reinforcing ribs 111 are arranged to be inclined relative to the horizontal plane, the inclination angle of the reinforcing ribs 111 ranges from 10° to 90°; and / or, the thickness of the reinforcing ribs 111 ranges from 0.1 mm to 5 mm; and / or, the spacing between two adjacent reinforcing ribs 111 ranges from 2 mm to 20 mm. The inclination angle of the reinforcing ribs 111 can be 10°, and the structural strength of the liquid cooling pipeline 1 is greater. The inclination angle of the reinforcing ribs 111 can be 90°, and the forming process is simpler. The inclination angle of the reinforcing ribs 111 can be 45°, and the structural strength and the difficulty of the forming process are balanced. The thickness of the reinforcing ribs 111 can be 0.1 mm, and the weight is lighter. The thickness of the reinforcing ribs 111 can be 5 mm, and the cracking risk is smaller. The thickness of the reinforcing ribs 111 can be 2.5 mm, and the weight and the cracking risk are balanced. The spacing between two adjacent reinforcing ribs 111 can be 2 mm, and the structural strength of the liquid cooling pipeline 1 is greater. The spacing between two adjacent reinforcing ribs 111 can be 20 mm, and the flow resistance of the cooling liquid flow channel 114 is smaller. The spacing between two adjacent reinforcing ribs 111 can be 10 mm, and the structural strength of the liquid cooling pipeline 1 and the flow resistance of the cooling liquid flow channel 114 are balanced. The inclination angle of the reinforcing ribs 111 can be 45°, the thickness of the reinforcing ribs 111 can be 0.5 mm, and the spacing between two adjacent reinforcing ribs 111 can be 7 mm. The above inclination angle, thickness, and spacing will affect the body strength, the difficulty of the forming process (yield), the product profile, the cracking risk degree under extrusion, the weight, the flow resistance, and the like of the liquid cooling pipeline 1. For example, the above inclination angle and thickness have a positive correlation effect on the body strength of the liquid cooling pipeline 1, and the above spacing has a negative correlation effect on the body strength of the liquid cooling pipeline 1. The above inclination angle, thickness, and spacing all have a negative correlation effect on the difficulty of the forming process (yield) of the liquid cooling pipeline 1. The above inclination angle has no obvious effect on the product profile of the liquid cooling pipeline 1, the above thickness has a positive correlation effect on the product profile of the liquid cooling pipeline 1, and the above spacing has a negative correlation effect on the product profile of the liquid cooling pipeline 1. The above inclination angle and spacing have no obvious effect on the cracking risk degree of the liquid cooling pipeline 1, and the above thickness has a negative correlation effect on the cracking risk degree of the liquid cooling pipeline 1. The above inclination angle and spacing have a negative correlation effect on the weight of the liquid cooling pipeline 1, and the above thickness has a positive correlation effect on the weight of the liquid cooling pipeline 1. The above inclination angle and spacing have no obvious effect on the cracking risk degree of the liquid cooling pipeline 1, and the above thickness has a negative correlation effect on the cracking risk degree of the liquid cooling pipeline 1. The above inclination angle and spacing have a negative correlation effect on the flow resistance of the liquid cooling pipeline 1, and the above thickness has a positive correlation effect on the flow resistance of the liquid cooling pipeline 1.

[0047] It can be understood that the liquid cooling pipeline 1 can include a harmonica tube 11, a current collector 12, and a water pipe 13, the hot melt structure 14 is arranged on the harmonica tube 11, the current collector 12 is communicated with the cooling liquid supply device through the water pipe 13, the cooling liquid is distributed into each cooling liquid flow channel 114 inside the harmonica tube 11 through the current collector 12, the current collector 12 is provided with an inlet 121 and an outlet 122 for inflow and outflow of the cooling liquid. The reinforcing rib 111 is arranged in the harmonica tube 11, and the hot melt structure 14 can be connected with the emergency spray port 113 at the bottom of the harmonica tube 11 in a mode of integrated extrusion, local potting, or clamping, etc.

[0048] The embodiment also provides a battery pack, which includes the battery module 3 and the liquid cooling pipeline 1 described above, the battery module 3 includes a plurality of battery cells 31, and the liquid cooling pipeline 1 is used for cooling the pole of the battery cell 31. The battery pack also includes the battery connection system 2 and the bottom liquid cooling assembly 4, the battery connection system 2 is located between the liquid cooling pipeline 1 and the battery module 3, and the bottom liquid cooling assembly 4 is located below the battery module 3. The bottom of the harmonica tube 11 is provided with a structural adhesive 112, and the structural adhesive 112 is connected with the battery connection system 2. The battery module 3 also includes a large-face thermal insulation material 32, a side-face thermal insulation material 33, and an end insulation plate 34, the large-face thermal insulation material 32 is arranged between two adjacent battery cells 31, the side-face thermal insulation material 33 is arranged on the side of the battery cell 31, and the end insulation plate 34 is arranged on the outer side of the battery cell 31 at both ends.

[0049] The emergency spray port 113 communicated with the cooling liquid flow channel 114 is arranged on the liquid cooling pipeline 1, and the hot melt structure 14 is pre-sealed at the emergency spray port 113. Since the melting point of the hot melt structure 14 is higher than the temperature of the cooling liquid, when the battery cell 31 normally works, the liquid cooling pipeline 1 plays a role of cooling the battery cell 31. Since the melting point of the hot melt structure 14 is lower than the temperature of the spray material of the explosion-proof valve 311, when the battery cell 31 loses control, the spray material of the explosion-proof valve 311 melts the hot melt structure 14, so that the cooling liquid in the cooling liquid flow channel 114 enters the inside of the out-of-control battery cell 31 through the emergency spray port 113 and the explosion-proof valve 311, and performs rapid fire extinguishing and cooling, reduces the loss of thermal runaway, effectively prevents the spread of thermal runaway, and improves the safety of the battery pack and the vehicle.

[0050] Optionally, the distance H between the hot melt structure 14 and the explosion-proof valve 311 ranges from 3 mm to 30 mm. The distance H between the hot melt structure 14 and the explosion-proof valve 311 is determined according to the required opening space and exhaust space of the explosion-proof valve 311, and the smaller the distance H is, the more intense the melting effect of the hot melt structure 14 is. The distance H can be 3 mm, and the melting effect of the hot melt structure 14 is relatively intense. The distance H can be 30 mm, and the space is relatively large, so it is not easy to explode. The distance H can be 15 mm, and the melting effect of the hot melt structure 14 and the space requirement are balanced.

[0051] In the top view, the pressure relief port of the explosion-proof valve 311 can be seen as an oblong circle. When the hot melting structure 14 is a circular structure, the diameter of the hot melting structure 14 needs to be greater than the minimum diameter of the oblong circle to improve the fire extinguishing and cooling efficiency. To consider the influence of the emergency spray port 113 on the structural strength of the liquid cooling pipeline 1, the diameter of the hot melting structure 14 cannot be too large. Alternatively, the width of the hot melting structure 14 is greater than the width of the explosion-proof valve 311, and the distance between the boundary of the hot melting structure 14 and the boundary of the explosion-proof valve 311 is a first distance L, and the value range of the first distance L is 0-30 mm. The first distance L can be 30 mm, and the fire extinguishing and cooling efficiency of the emergency spray port 113 is higher. The first distance L can be 0, at this time the horizontal projection of the hot melting structure 14 can completely cover the pressure relief port of the explosion-proof valve 311, and the emergency spray port 113 opened on the liquid cooling pipeline 1 has little influence on the structural strength of the liquid cooling pipeline 1. The first distance L can be 10 mm, 15 mm or 20 mm, balancing the contradiction between the high fire extinguishing and cooling efficiency of the emergency spray port 113 and the structural strength of the liquid cooling pipeline 1. In some embodiments, the value range of the first distance L is 3-5 mm. The first distance L can be 3 mm, which has little influence on the structural strength of the liquid cooling pipeline 1 on the premise of ensuring the sufficient fire extinguishing and cooling efficiency of the emergency spray port 113. The first distance L can be 4 mm, and the fire extinguishing and cooling efficiency of the emergency spray port 113 and the sufficient structural strength of the liquid cooling pipeline 1 are well balanced. The first distance L can be 5 mm, which has high fire extinguishing and cooling efficiency of the emergency spray port 113 on the premise of ensuring the sufficient structural strength of the liquid cooling pipeline 1. Considering the process feasibility and interference with other parts, the hot melting structure 14 is slightly larger than the explosion-proof valve 311, which can avoid the situation that the melting effect is poor when the explosion-proof valve 311 is opened on one side. Alternatively, the width of the hot melting structure 14 is less than the width of the explosion-proof valve 311, and the distance between the boundary of the explosion-proof valve 311 and the boundary of the hot melting structure 14 is a second distance L', and the value range of the second distance L' is 0-30 mm. The second distance L' can be 0, and the boundary of the explosion-proof valve 311 coincides with the boundary of the hot melting structure 14 in the horizontal projection at this time, and the horizontal projection of the hot melting structure 14 can completely cover the pressure relief port of the explosion-proof valve 311, and the pressure relief effect is good. The second distance L' can be 30 mm, and the emergency spray port 113 opened on the liquid cooling pipeline 1 has little influence on the structural strength of the liquid cooling pipeline 1. The second distance L' can be 10 mm, 15 mm or 20 mm, balancing the contradiction between the pressure relief effect of the emergency spray port 113 and the structural strength of the liquid cooling pipeline 1. In this way, the hot melting structure 14 can cover most of the pressure relief port of the explosion-proof valve 311 in the horizontal projection, and the emergency spray port 113 opened on the liquid cooling pipeline 1 has little influence on the structural strength of the liquid cooling pipeline 1.

[0052] The embodiment also provides a vehicle comprising the battery pack, wherein the emergency spray opening 113 is arranged on the liquid cooling pipeline 1 and communicates with the cooling liquid flow channel 114, and the hot melt structure 14 is pre-sealed in the emergency spray opening 113; since the melting point of the hot melt structure 14 is higher than the temperature of the cooling liquid, when the battery cell 31 normally works, the liquid cooling pipeline 1 plays a role of cooling the battery cell 31; since the melting point of the hot melt structure 14 is lower than the temperature of the spray material sprayed by the explosion-proof valve 311, when the battery cell 31 loses control, the spray material of the explosion-proof valve 311 melts the hot melt structure 14, so that the cooling liquid in the cooling liquid flow channel 114 enters the inside of the battery cell 31 losing control through the emergency spray opening 113 and the explosion-proof valve 311, and rapid fire extinguishing and cooling are performed, loss of thermal runaway is reduced, spread of the thermal runaway is effectively prevented, and the safety of the battery pack and the vehicle is improved.

[0053] It should be noted that the above only describes the preferred embodiments of the present application and the technical principles applied. Those skilled in the art will understand that the present application is not limited to the specific embodiments herein, and those skilled in the art can make various obvious changes, re-adjustments and substitutions without departing from the protection scope of the present application. Therefore, although the present application has been described in detail through the above embodiments, the present application is not limited to the above embodiments, and more other equivalent embodiments can be included without departing from the concept of the present application, and the scope of the present application is determined by the appended claims.

Claims

1. Liquid-cooled tubing, characterized in that, The liquid cooling pipeline is provided with a cooling liquid flow channel (114) and an emergency spray port (113) in communication, the cooling liquid flow channel (114) is provided with cooling liquid, the emergency spray port (113) is blocked with a hot melting structure (14), the melting point of the hot melting structure (14) is higher than the temperature of the cooling liquid and lower than the temperature of the eruption material sprayed by the explosion-proof valve (311).

2. The liquid-cooled tubing of claim 1, wherein, The emergency spray port (113) is a hole structure and is distributed in a lattice along the liquid cooling pipeline; and / or the emergency spray port (113) is a linear slot structure and extends along the length direction of the liquid cooling pipeline.

3. The liquid-cooled tubing of claim 1 or 2, wherein, The hot melting structure (14) is a plastic structure or a metal structure.

4. The liquid-cooled tubing of claim 1 or 2, wherein, The liquid cooling pipeline is provided with a plurality of reinforcing ribs (111), and the reinforcing ribs (111) separate the inner cavity of the liquid cooling pipeline to form the cooling liquid flow channel (114).

5. The liquid-cooled tubing of claim 4, wherein, The reinforcing rib (111) is arranged inclined to the horizontal plane, and the inclination angle of the reinforcing rib (111) ranges from 10° to 90°; and / or the thickness of the reinforcing rib (111) ranges from 0.1 mm to 5 mm; and / or the spacing between two adjacent reinforcing ribs (111) ranges from 2 mm to 20 mm.

6. A battery pack characterized by, The battery module (3) and the liquid cooling pipeline according to any one of claims 1-5 are included.

7. The battery pack of claim 6, wherein, The spacing between the hot melting structure (14) and the explosion-proof valve (311) ranges from 3 mm to 30 mm.

8. The battery pack of claim 6, wherein, The width of the hot melting structure (14) is greater than the width of the explosion-proof valve (311), the distance between the boundary of the hot melting structure (14) and the boundary of the explosion-proof valve (311) is a first distance, and the first distance ranges from 0 to 30 mm.

9. The battery pack of claim 8, wherein, The first distance ranges from 3 mm to 5 mm.

10. The battery pack of any one of claims 6-9, wherein, The width of the hot melting structure (14) is less than the width of the explosion-proof valve (311), the distance between the boundary of the explosion-proof valve (311) and the boundary of the hot melting structure (14) is a second distance, and the second distance ranges from 0 to 30 mm.

11. Vehicle, characterized in that The battery pack according to any one of claims 6-10 is included. The battery pack according to any one of claims 6-10 is included.

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