Harmonica-shaped tube, cooling assembly, battery pack and electric equipment

Abstract

A harmonica-shaped tube, a cooling assembly, a battery pack and an electric device, the harmonica-shaped tube is suitable for being arranged in the battery pack, the battery pack comprises a plurality of battery cells arranged in sequence in a first direction, and the first direction is the same as the thickness direction of the battery cells; the harmonica-shaped tube is plate-shaped and comprises a first surface and a second surface opposite to each other in a first direction, and the first surface and / or the second surface are / is suitable for being tightly attached to the battery cell; the harmonica-shaped tube is provided with a first flow channel, a first liquid inlet and a first liquid outlet, the first liquid inlet and the first liquid outlet communicate with the first flow channel, and the cooling medium is suitable for entering the first flow channel from the first liquid inlet and flowing out from the first liquid outlet. The harmonica-shaped tube has high cooling efficiency on the battery cell.

Description

Technical Field

[0001] The utility model relates to the technical field of batteries, in particular to a harmonica pipe, a cooling component, a battery pack and electrical equipment. Background Art

[0002] When the battery cell is fast charged, the current and voltage are relatively large, so more heat is generated. If the heat is too high, it will damage the battery cell and affect the battery life and safety. Therefore, in order to protect the battery cell and ensure its normal operation, effective heat dissipation measures need to be taken to control the temperature of the battery cell.

[0003] The existing harmonica tube cooling only cools the end surface of the battery cell in the height direction, which has low cooling efficiency for the battery cell and is not conducive to high-rate charging and discharging of the battery cell. Utility Model Content

[0004] The utility model aims to provide a harmonica pipe, a cooling assembly, a battery pack and an electric device, so as to solve the problem that the harmonica pipe has low cooling efficiency on a battery core.

[0005] In order to achieve the purpose of the utility model, the utility model provides the following technical solutions:

[0006] In a first aspect, the utility model provides a harmonica tube, the harmonica tube being suitable for being arranged in a battery pack, the battery pack comprising a plurality of battery cells arranged in sequence in a first direction, the first direction being the same as a thickness direction of the battery cells;

[0007] The harmonica tube is plate-shaped and includes a first surface and a second surface opposite to each other in the first direction, and the first surface and / or the second surface are suitable for being in close contact with the battery core;

[0008] The harmonica tube has a first flow channel, a first liquid inlet and a first liquid outlet. The first liquid inlet and the first liquid outlet are respectively connected to the first flow channel. The cooling medium is suitable for entering the first flow channel from the first liquid inlet and flowing out from the first liquid outlet.

[0009] In one embodiment, the harmonica tube includes a main body portion, the main body portion extends in a curved shape, and the first flow channel is disposed in the main body portion.

[0010] In one embodiment, the main body includes a first liquid inlet pipe, a first pipe, a second pipe, a third pipe and a first liquid outlet pipe which are connected in sequence; the first liquid inlet pipe, the second pipe and the first liquid outlet pipe extend in a second direction, the first pipe and the third pipe extend in a third direction, the first pipe and the third pipe are spaced apart in the second direction, and the first direction, the second direction and the third direction intersect each other.

[0011] In one embodiment, the first liquid inlet pipe is welded to one end of the first pipeline, the other end of the first pipeline is welded to one end of the second pipeline, the other end of the second pipeline is welded to one end of the third pipeline, and the other end of the third pipeline is welded to the first liquid outlet pipe.

[0012] In one embodiment, the first liquid inlet pipe and the first liquid outlet pipe are arranged on the same side of the second pipe, the first liquid inlet pipe protrudes from the first pipe in the second direction, and the first liquid outlet pipe protrudes from the third pipe in the second direction.

[0013] In one embodiment, the harmonica pipe further includes a reinforcing plate, and the reinforcing plate connects the first pipe and the third pipe.

[0014] In one embodiment, the reinforcing plate, the first pipe and the third pipe are an integrated structure.

[0015] In one embodiment, the harmonica pipe further includes a connecting plate, which is connected to the third pipe and is suitable for being connected and fixed to a cold plate of a cooling assembly.

[0016] In a second aspect, the utility model provides a cooling assembly, comprising:

[0017] a cold plate having a second flow channel;

[0018] The harmonica pipe as described in any one of the first aspects, wherein the harmonica pipe is connected to the cold plate, and the first liquid inlet and the first liquid outlet are respectively communicated with the second flow channel.

[0019] In one embodiment, the cold plate includes a flow channel plate and a temperature averaging plate, the temperature averaging plate is stacked on the flow channel plate in a second upward direction, the flow channel plate has the second flow channel, the temperature averaging plate is provided with a connecting channel, the first liquid inlet, the first liquid outlet and the second flow channel are respectively connected to the connecting channel, and the second direction intersects with the first direction.

[0020] In one embodiment, the second flow channel includes a liquid inlet flow channel and a liquid outlet flow channel, the first liquid inlet is communicated with the liquid inlet flow channel, and the first liquid outlet is communicated with the liquid outlet flow channel.

[0021] In one embodiment, the liquid inlet channel includes a liquid inlet section extending in the first direction, the liquid outlet channel includes a liquid outlet section extending in the first direction, the liquid inlet section and the liquid outlet section are spaced apart in a third direction, the first liquid inlet is connected to the liquid inlet section, the first liquid outlet is connected to the liquid outlet section, and the third direction intersects with the first direction.

[0022] In one embodiment, the harmonica tubes are divided into multiple groups, and multiple harmonica tubes in each group are distributed in an array on the flow channel plate along the first direction, and multiple groups of harmonica tubes are arranged at intervals in the third direction, and the flow channel plate is correspondingly provided with multiple liquid inlet sections and liquid outlet sections in the third direction.

[0023] In a third aspect, the utility model provides a battery pack, comprising a plurality of battery cells and a cooling assembly as described in any one of the second aspects, wherein the harmonica tube is arranged between two adjacent battery cells, and / or the harmonica tube is arranged at the outermost sides of the plurality of battery cells in the first direction.

[0024] In one implementation, the number of the battery cells between two adjacent harmonica tubes is n, satisfying: 1≤n≤5, where n is a positive integer.

[0025] In one embodiment, the height of the harmonica tube in the second direction is h1, and the height of the battery cell in the second direction is h2, satisfying: 0.5h2≤h1≤h2, and the first direction intersects the second direction.

[0026] In a fourth aspect, the utility model provides an electrical equipment, comprising an electrical device and a battery pack as described in any one of the third aspects, wherein the battery pack is suitable for supplying power to the electrical device.

[0027] The harmonica tube of the utility model is arranged in a battery pack, is in the shape of a plate with a first flow channel and is in close contact with a large surface of a battery cell of the battery pack in a thickness direction, a cooling medium enters the first flow channel from a first liquid inlet and flows out from a first liquid outlet, so that an area over which the cooling medium cools the battery cell is large, thereby improving the cooling efficiency of the harmonica tube on the battery cell and facilitating high-rate charging and discharging of the battery cell. BRIEF DESCRIPTION OF THE DRAWINGS

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

[0029] Figure 1 is an exploded view of a cooling assembly of one embodiment;

[0030] Figure 2 is a perspective view of a cooling assembly of an embodiment;

[0031] Figure 3 is a top view of a cooling assembly of one embodiment;

[0032] Figure 4 The figure is a top view of a flow channel plate of an embodiment.

[0033] Description of reference numerals:

[0034] 100-cooling assembly, 10-harmonica pipe, 11-first flow channel, 12-first liquid inlet, 13-first liquid outlet, 14-main body, 141-first liquid inlet pipe, 142-first pipeline, 143-second pipeline, 144-third pipeline, 145-first liquid outlet, 15-reinforcement plate, 16-connecting plate, 17-first surface, 18-second surface, 20-cold plate, 21-second flow channel, 212-liquid inlet channel, 2121-liquid inlet section, 2122-first section, 213-liquid outlet channel, 2131-liquid outlet section, 2132-second section, 22-flow channel plate, 23-temperature averaging plate, 30-side plate, 40-accommodating chamber, 50-second liquid inlet pipe, 60-second liquid outlet pipe, 70-mounting member, 80-partition plate;

[0035] X-first direction, Z-second direction, Y-third direction. DETAILED DESCRIPTION

[0036] 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.

[0037] 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.

[0038] Unless otherwise defined, all technical and scientific terms used in this utility model have the same meaning as those commonly understood by technicians in the technical field of this utility model. The terms used in the specification of this utility model are only for the purpose of describing specific embodiments and are not intended to limit this utility model. The term "and / or" used in this utility model includes any and all combinations of one or more related listed items.

[0039] 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.

[0040] The utility model provides a battery pack, which includes a box body, which includes a bottom plate and a top cover arranged relatively to each other, and the box body encloses a receiving space, in which a battery cell is received. Since the battery cell generates heat during the charging and discharging process, the existing battery pack generally has a cooling device arranged on the bottom plate and the top cover to cool down the end face of the battery cell in the height direction. However, the cooling device arranged in the height direction of the battery cell has a poor cooling effect on the entire battery cell, and the temperature of the battery cell is still high during use.

[0041] refer to Figure 1 The utility model provides a harmonica pipe 10, which is suitable for being arranged in a battery pack. The battery pack includes a plurality of battery cells arranged in sequence in a first direction X, and the first direction X is the same as the thickness direction of the battery cells. The harmonica pipe 10 is plate-shaped and includes a first surface 17 and a second surface 18 opposite to each other in the first direction X. The first surface 17 and / or the second surface 18 are suitable for being in close contact with the battery cells. The harmonica pipe 10 has a first flow channel 11 ( Figure 1 The first flow channel 11 shown in the figure is the internal structure of the harmonica tube 10), the first liquid inlet 12 and the first liquid outlet 13, the first liquid inlet 12 and the first liquid outlet 13 are respectively connected to the first flow channel 11, and the cooling medium is suitable for entering the first flow channel 11 from the first liquid inlet 12 and flowing out from the first liquid outlet 13.

[0042] The harmonica pipe 10 is a heat-conducting material with high structural strength, and specifically can be a metal material, high-strength plastic, ceramic, etc. The metal material is, for example, aluminum, aluminum alloy, magnesium alloy, iron, and iron alloy.

[0043] The harmonica pipe 10 can be processed by casting, machining, welding, etc., without limitation.

[0044] The first flow channel 11 is in a curved and extending shape.

[0045] The harmonica tube 10 of the utility model is arranged in the battery pack. The harmonica tube 10 is in the shape of a plate with a first flow channel 11 and is in close contact with the large surface of the battery cell of the battery pack in the thickness direction. The cooling medium enters the first flow channel 11 from the first liquid inlet 12 and flows out from the first liquid outlet 13, so that the cooling medium has a large area to cool the battery cell, thereby improving the cooling efficiency of the harmonica tube 10 on the battery cell, which is beneficial to the high-rate charging and discharging of the battery cell.

[0046] refer to Figure 1 In one embodiment, the harmonica tube 10 includes a main body 14 , the main body 14 extends in a curved shape, and the first flow channel 11 is disposed in the main body 14 .

[0047] The bent and extended main body 14 can increase the cooling effect area of ​​the cooling medium on the battery core, thereby improving the cooling efficiency of the harmonica tube 10 on the battery core, and facilitating high-rate charging and discharging of the battery core.

[0048] refer to Figure 1 In one embodiment, the main body 14 includes a first liquid inlet pipe 141, a first pipe 142, a second pipe 143, a third pipe 144 and a first liquid outlet pipe 145 which are connected in sequence; the first liquid inlet pipe 141, the second pipe 143 and the first liquid outlet pipe 145 extend in the second direction Z, the first pipe 142 and the third pipe 144 extend in the third direction Y, the first pipe 142 and the third pipe 144 are spaced apart in the second direction Z, and the first direction X, the second direction Z and the third direction Y intersect each other.

[0049] The first liquid inlet pipe 141 , the first pipeline 142 , the second pipeline 143 , the third pipeline 144 and the first liquid outlet pipe 145 may be connected by welding, bonding, etc., without limitation.

[0050] Optionally, the first liquid inlet pipe 141 is welded to one end of the first pipe 142, the other end of the first pipe 142 is welded to one end of the second pipe 143, the other end of the second pipe 143 is welded to one end of the third pipe 144, and the other end of the third pipe 144 is welded to the first liquid outlet pipe 145.

[0051] In one embodiment, the first liquid inlet pipe 141 and the first liquid outlet pipe 145 are arranged on the same side of the second pipe 143, the first liquid inlet pipe 141 protrudes from the first pipe 142 in the second direction Z, and the first liquid outlet pipe 145 protrudes from the third pipe 144 in the second direction Z.

[0052] The first liquid inlet pipe 141 and the first liquid outlet pipe 145 are arranged on the same side of the second pipe 143 , which can save the size of the harmonica pipe 10 in the third direction Y, thereby improving the space utilization of the harmonica pipe 10 .

[0053] In one embodiment, the harmonica pipe 10 further includes a reinforcing plate 15 , and the reinforcing plate 15 connects the first pipe 142 and the third pipe 144 .

[0054] The reinforcing plate 15 may be in the shape of a plate or a plurality of rods arranged at intervals, without limitation.

[0055] The reinforcing plate 15 is made of a material with a certain structural strength, and may be specifically made of aluminum, aluminum alloy, copper, copper alloy, steel, etc., without limitation.

[0056] The thickness of the reinforcing plate 15 is smaller than the thickness of the first duct 142 and the third duct 144 .

[0057] The reinforcing plate 15 and the first pipe 142 and the third pipe 144 may be connected by bonding, welding, clamping, etc.

[0058] In one embodiment, the reinforcing plate 15, the first pipe 142 and the third pipe 144 are an integrated structure. The corresponding integrated molding method can be stamping, casting, etc.

[0059] The reinforcing plate 15 is provided between the first pipe 142 and the third pipe 144 to provide support for the main body 14 , so that the main body 14 can maintain strength when the cooling medium flows in the first flow channel 11 , which helps to increase the service life of the harmonica pipe 10 .

[0060] In one embodiment, the harmonica pipe 10 further includes a connecting plate 16 , which is connected to the third pipe 144 and is suitable for being connected and fixed to the cold plate 20 of the cooling assembly 100 .

[0061] The shape of the connecting plate 16 can be a plate or a plurality of rods arranged at intervals, without limitation.

[0062] The connecting plate 16 is made of a material with a certain structural strength, and specifically can be aluminum, aluminum alloy, copper, copper alloy, steel, etc., without limitation.

[0063] The connection method of the connection plate 16, the flow channel plate 22 and the third pipeline 144 can be bonding, welding, clamping, etc.

[0064] A connecting plate 16 is provided between the third pipe 144 and the flow channel plate 22 of the cooling assembly 100 to enhance the structural stability of the cooling assembly 100 , which is beneficial to improving the service life of the harmonica pipe 10 and the cooling assembly 100 .

[0065] refer to Figure 1 , Figure 2 and Figure 4 The utility model provides a cooling assembly 100, comprising a flow channel plate 22 and a harmonica pipe 10 as described in any of the above embodiments. The flow channel plate 22 and the cold plate 20 have a second flow channel 21. The harmonica pipe 10 is connected to the cold plate 20, and the first liquid inlet 12 and the first liquid outlet 13 are respectively connected to the second flow channel 21.

[0066] Figure 4 The second flow channel 21 shown in FIG. 2 is the internal structure of the flow channel plate 22 .

[0067] In one embodiment, the cold plate 20 includes a flow channel plate 22 and a temperature balancing plate 23, the temperature balancing plate 23 is stacked on the flow channel plate 22 in the second direction Z, the flow channel plate 22 has a second flow channel 21, the temperature balancing plate 23 is provided with a connecting channel, the first liquid inlet 12, the first liquid outlet 13 and the second flow channel 21 are respectively connected to the connecting channel.

[0068] The processing method of the flow channel plate 22 can be a cavity type flow channel plate 22, a pressure tube type flow channel plate 22, a friction welding type flow channel plate 22, a vacuum brazing type flow channel plate 22, etc., without limitation.

[0069] The flow channel plate 22 and the temperature uniform plate 23 are made of heat-conducting materials with high structural strength, and specifically can be made of metal materials, ceramics, etc. The metal materials are, for example, aluminum, aluminum alloy, magnesium alloy, iron, and iron alloy.

[0070] refer to Figure 1 , Figure 2 and Figure 3 The cooling assembly 100 further includes a plurality of side panels 30, which together with the flow channel plate 22 enclose a receiving cavity 40, and the harmonica tube 10 is received in the receiving cavity 40. The plurality of side panels 30 and the flow channel plate 22 may be an integral structure made by an integral molding process, and the integral molding process may be stamping, casting, etc., without limitation; the plurality of side panels 30 and the flow channel plate 22 may also be a split structure, and the side panels 30 and the flow channel plate 22 may be connected and fixed by welding, bonding, clamping, screwing, etc.

[0071] refer to Figure 3 The cooling assembly 100 is further provided with a second liquid inlet pipe 50 and a second liquid outlet pipe 60, which can be provided on the same side plate 30 of the cooling assembly 100 or on different side plates 30. The second liquid inlet pipe 50 is used to transport the cooling medium to the second flow channel 21, and the second liquid outlet pipe 60 discharges the cooling medium from the second flow channel 21.

[0072] The cooling assembly 100 of the utility model has a flow channel plate 22 and a harmonica tube 10. The cooling medium enters the harmonica tube 10 from the second flow channel 21 of the flow channel plate 22 and enters the second flow channel 21 from the first liquid outlet 13 of the harmonica tube 10 to complete the circulation flow of the cooling medium. The harmonica tube 10 is in the shape of a plate with a first flow channel 11 and is in close contact with the large surface of the battery cell of the battery pack in the thickness direction. The cooling medium enters the first flow channel 11 from the first liquid inlet 12 and flows out from the first liquid outlet 13, so that the cooling medium has a large area to cool the battery cell, thereby improving the cooling efficiency of the harmonica tube 10 on the battery cell, which is beneficial to the high-rate charging and discharging of the battery cell.

[0073] refer to Figure 4 In one embodiment, the second flow channel 21 includes a liquid inlet flow channel 212 and a liquid outlet flow channel 213 , the first liquid inlet 12 is connected to the liquid inlet flow channel 212 , and the first liquid outlet 13 is connected to the liquid outlet flow channel 213 .

[0074] The liquid inlet channel 212 and the liquid outlet channel 213 are arranged at intervals. The liquid inlet channel 212 is connected to the first liquid inlet 12 of the harmonica tube 10, and the liquid outlet channel 213 is connected to the first liquid outlet 13 of the harmonica tube 10, thereby realizing the circulation of the cooling medium in the harmonica tube 10, which is beneficial to the cooling of the battery cell by the harmonica tube 10 and realizing high-rate charging and discharging of the battery cell.

[0075] refer to Figure 3 and Figure 4In one embodiment, the liquid inlet channel 212 includes a liquid inlet section 2121 extending in a first direction X, and the liquid outlet channel 213 includes a liquid outlet section 2131 extending in the first direction X. The liquid inlet section 2121 and the liquid outlet section 2131 are spaced apart in a third direction Y. The first liquid inlet 12 is connected to the liquid inlet section 2121, and the first liquid outlet 13 is connected to the liquid outlet section 2131. The third direction Y intersects with the first direction X.

[0076] The liquid inlet channel 212 also includes a first section 2122 connected to the liquid inlet section 2121, and the two ends of the first section 2122 are respectively connected to the second liquid inlet pipe 50 and the liquid inlet section 2121; the liquid outlet channel 213 also includes a second section 2132 connected to the liquid outlet section 2131, and the two ends of the second section 2132 are respectively connected to the second liquid outlet pipe 60 and the liquid outlet section 2131; the cooling medium enters the first section 2122 and the liquid inlet section 2121 of the harmonica tube 10 from the second liquid inlet pipe 50 to cool the battery cell, and the cooling medium flows from the liquid outlet section 2131 and the second section 2132 of the harmonica tube 10 to the second liquid outlet pipe 60, thereby realizing the circulation of the cooling medium, so that the harmonica tube 10 can cool the large surface of the battery cell, and realize rapid cooling of the battery cell during high-rate fast charging.

[0077] In one embodiment, the harmonica tubes 10 are divided into multiple groups, and multiple harmonica tubes 10 in each group are distributed in an array on the flow channel plate 22 along a first direction X, and multiple groups of harmonica tubes 10 are arranged at intervals in a third direction Y. The flow channel plate 22 is correspondingly provided with multiple liquid inlet sections 2121 and liquid outlet sections 2131 in the third direction Y.

[0078] Multiple harmonica tubes 10 are distributed in an array in the first direction X, so that the multiple harmonica tubes 10 in each group of harmonica tubes 10 are connected to the same liquid inlet section 2121 and the same liquid outlet section 2131; multiple liquid inlet sections 2121 can be connected to the same first section 2122, and multiple liquid outlet sections 2131 can be connected to the same second section 2132.

[0079] A plurality of groups of harmonica tubes 10 can cool a plurality of battery cells, which is beneficial to improving the energy density and space utilization of the battery pack and saving production costs.

[0080] refer to Figure 2 In one embodiment, two adjacent groups of harmonica pipes 10 are directly provided with a partition 80 , and the partition 80 is used to enhance the structural stability of the cooling assembly 100 .

[0081] The utility model provides a battery pack, comprising a plurality of battery cells and a cooling assembly 100 as described in any of the aforementioned embodiments, wherein the harmonica tube 10 is arranged between two adjacent battery cells, and / or the harmonica tube 10 is arranged at the outermost sides of the plurality of battery cells in a first direction X.

[0082] The battery cell may be a square battery cell, and the cross-sectional shape of the battery cell along the first direction X is a rectangle. Specifically, the battery cell may be a blade battery cell, which can be directly integrated into a battery pack without a module, thereby greatly improving the integration efficiency.

[0083] Blade batteries can use lithium iron phosphate as the positive electrode material and graphite as the negative electrode material. While ensuring the high energy of the battery cell, the battery cell will not catch fire or explode when punctured, thereby improving the safety of the battery pack.

[0084] The harmonica tube 10 of the battery pack of the utility model can cool down multiple battery cells, thereby improving the space utilization and energy density of the battery pack, while ensuring that the battery cells have sufficient heat dissipation area and transferring the internal heat to the outside, which can effectively avoid the problem of thermal runaway of the battery cells, extend the service life of the battery cells, and facilitate high-rate charging and discharging of the battery cells.

[0085] In one implementation, the number of battery cells between two adjacent harmonica tubes 10 is n, satisfying: 1≤n≤5, where n is a positive integer.

[0086] n can be 1, 2, 3, 4, or 5 without limitation.

[0087] When n>5, the harmonica tube 10 has a poor cooling effect on the battery cells that are not in direct contact with the harmonica tube 10; when 1≤n≤5, the harmonica tube 10 has a good cooling effect and can meet the cooling needs of the battery cells that are not in direct contact with the harmonica tube 10. A single harmonica tube 10 can achieve the cooling effect on multiple battery cells, which can reduce the space occupied by the cooling element in the battery pack, improve the space utilization and energy density of the battery pack, and also reduce the production cost of the battery pack.

[0088] In one implementation, the height of the harmonica tube 10 in the second direction Z is h1, and the height of the battery cell in the second direction Z is h2, satisfying: 0.5h2≤h1≤h2, and the first direction X intersects with the second direction Z.

[0089] When h1>h2, the harmonica tube 10 is higher than the battery cell in the second direction Z, and the harmonica tube 10 still has a cooling effect, but the space utilization rate of the harmonica tube 10 is low; when 0.5h2>h1, the battery cell is too higher than the harmonica tube 10 in the second direction Z, and the contact area of ​​the harmonica tube 10 and the battery cell accounts for a small proportion of the battery cell surface, and the cooling effect of the harmonica tube 10 on the battery cell is poor; when 0.5h2≤h1≤h2, the harmonica tube 10 can take into account both the cooling effect and the space utilization rate.

[0090] In one embodiment, an adhesive layer is provided between two adjacent harmonica tubes 10 , and the adhesive layer can tightly bond the battery cells to improve the stability of the battery pack.

[0091] In one embodiment, the battery pack further includes a mounting member 70 . There may be a plurality of mounting members 70 , which are evenly spaced apart on the side panel 30 . Providing the mounting members 70 can facilitate installation and transportation of the battery pack.

[0092] The utility model provides an electrical equipment, including an electrical device and a battery pack as described in any of the aforementioned embodiments, and the battery pack is suitable for supplying power to the electrical device. The electrical device may be a lighting system, a transformer, an ignition system, etc., and the electrical equipment may be a car, a refrigerator, a hull, etc., without limitation. The battery pack of the utility model utilizes the harmonica tube 10 to achieve large-surface cooling of the battery cell, and the harmonica tube 10 can achieve cooling effect on multiple battery cells, and can achieve rapid cooling of the battery cell during high-rate fast charging, which is beneficial to improving the space utilization and energy density of the battery pack, while reducing the production cost of the battery pack.

[0093] In the description of the embodiments of the present invention, it should be noted that the orientation or positional relationship of terms such as "center", "up", "down", "left", "right", "vertical", "horizontal", "inside" and "outside" are based on the orientation or positional relationship described in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0094] 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 embodiment 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 harmonica pipe, characterized in that: The harmonica tube is suitable for being arranged in a battery pack, and the battery pack includes a plurality of battery cells arranged in sequence in a first direction, and the first direction is the same as a thickness direction of the battery cells; The harmonica tube is plate-shaped and includes a first surface and a second surface opposite to each other in the first direction, and the first surface and / or the second surface are suitable for being in close contact with the battery core; The harmonica tube has a first flow channel, a first liquid inlet and a first liquid outlet. The first liquid inlet and the first liquid outlet are respectively connected to the first flow channel. The cooling medium is suitable for entering the first flow channel from the first liquid inlet and flowing out from the first liquid outlet.

2. The harmonica pipe according to claim 1, characterized in that: The harmonica pipe comprises a main body portion, the main body portion extends in a curved manner, and the first flow channel is arranged in the main body portion.

3. The harmonica pipe according to claim 2, characterized in that: The main body includes a first liquid inlet pipe, a first pipe, a second pipe, a third pipe and a first liquid outlet pipe which are connected in sequence; the first liquid inlet pipe, the second pipe and the first liquid outlet pipe extend in a second direction, the first pipe and the third pipe extend in a third direction, the first pipe and the third pipe are spaced apart in the second direction, and the first direction, the second direction and the third direction intersect each other.

4. The harmonica pipe according to claim 3, characterized in that: The first liquid inlet pipe is welded to one end of the first pipeline, the other end of the first pipeline is welded to one end of the second pipeline, the other end of the second pipeline is welded to one end of the third pipeline, and the other end of the third pipeline is welded to the first liquid outlet pipe.

5. The harmonica pipe according to claim 3, characterized in that: The first liquid inlet pipe and the first liquid outlet pipe are arranged on the same side of the second pipe, the first liquid inlet pipe protrudes from the first pipe in the second direction, and the first liquid outlet pipe protrudes from the third pipe in the second direction.

6. The harmonica pipe according to claim 3, characterized in that: The harmonica pipe further includes a reinforcing plate connecting the first pipe and the third pipe.

7. The harmonica pipe according to claim 6, characterized in that: The reinforcing plate, the first pipe and the third pipe are an integrated structure.

8. The harmonica pipe according to claim 3, characterized in that: The harmonica pipe also includes a connecting plate, which is connected to the third pipeline and is suitable for being connected and fixed to a cold plate of a cooling assembly.

9. A cooling assembly, characterized in that: include: a cold plate having a second flow channel; The harmonica pipe according to any one of claims 1 to 8, wherein the harmonica pipe is connected to the cold plate, and the first liquid inlet and the first liquid outlet are respectively connected to the second flow channel.

10. The cooling assembly according to claim 9, characterized in that The cold plate includes a flow channel plate and a temperature averaging plate, the temperature averaging plate is stacked on the flow channel plate in the second direction, the flow channel plate has the second flow channel, the temperature averaging plate is provided with a connecting channel, the first liquid inlet, the first liquid outlet and the second flow channel are respectively connected to the connecting channel, and the second direction intersects with the first direction.

11. The cooling assembly according to claim 10, characterized in that The second flow channel includes a liquid inlet flow channel and a liquid outlet flow channel, the first liquid inlet is communicated with the liquid inlet flow channel, and the first liquid outlet is communicated with the liquid outlet flow channel.

12. The cooling assembly according to claim 11, characterized in that The liquid inlet channel includes a liquid inlet section extending in the first direction, the liquid outlet channel includes a liquid outlet section extending in the first direction, the liquid inlet section and the liquid outlet section are spaced apart in a third direction, the first liquid inlet is connected to the liquid inlet section, the first liquid outlet is connected to the liquid outlet section, and the third direction intersects with the first direction.

13. The cooling assembly according to claim 12, characterized in that There are multiple groups of harmonica tubes, and multiple harmonica tubes in each group are distributed in an array on the flow channel plate along the first direction. Multiple groups of harmonica tubes are arranged at intervals in the third direction, and the flow channel plate is correspondingly provided with multiple liquid inlet sections and liquid outlet sections in the third direction.

14. A battery pack, characterized in that: It comprises a plurality of battery cells and a cooling assembly as claimed in any one of claims 9 to 13, wherein the harmonica tube is arranged between two adjacent battery cells, and / or the harmonica tube is arranged at the outermost sides of the plurality of battery cells in the first direction.

15. The battery pack according to claim 14, characterized in that: The number of the battery cells between two adjacent harmonica tubes is n, satisfying: 1≤n≤5, where n is a positive integer.

16. The battery pack according to claim 15, characterized in that: The height of the harmonica tube in the second direction is h1, and the height of the battery cell in the second direction is h2, which satisfies: 0.5h2≤h1≤h2, and the first direction intersects the second direction.

17. An electrical equipment, characterized in that: The invention comprises an electric device and a battery pack as claimed in any one of claims 14 to 16, wherein the battery pack is suitable for supplying power to the electric device.

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