Current collector, heat management component and battery pack

Abstract

The utility model provides a current collector, a heat management component and a battery pack, and relates to the technical field of batteries. The current collector comprises a current collecting unit, and the current collecting unit comprises a main body, a male end pipe joint, a female end pipe joint and a flexible sleeve; the main body is provided with an inner cavity, and an insertion hole, a first hole and a second hole which are communicated with the inner cavity; the male end pipe joint is connected with the main body and communicated with the first hole; the female end pipe joint is connected with the main body and communicated with the second hole; the flexible sleeve is connected with one of the male end pipe joint and the female end pipe joint. By arranging the flexible sleeve, not only can the sealing performance of the insertion part of the two current collectors be realized, but also the sealing length between the male end pipe joint and the female end pipe joint can be relatively long through the flexible sleeve, so that the assembly tolerance and the material tolerance can be absorbed by utilizing the elastic deformation of the flexible sleeve, the assembly difficulty can be further reduced, and the assembly efficiency can be improved. Therefore, the assembly efficiency is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of thermal management, in particular to a current collector, a thermal management component and a battery pack. BACKGROUND

[0002] In order to maintain the battery working in a suitable temperature range, a thermal management system needs to be configured for the battery to perform heating or cooling treatment on the battery. In the related art, the thermal management system includes pipelines, thermal management components connected to the pipelines, and a temperature adjusting module for adjusting the temperature of the heat exchange medium in the pipelines. Among them, there are multiple thermal management components, and the multiple thermal management components are connected in parallel to the pipelines. The thermal management components are thermally coupled with the battery cells to perform temperature treatment on the battery cells.

[0003] Since multiple thermal management components are connected in parallel, the layout of the thermal management components is compact, and the space for parallel connection between two adjacent thermal management components is small. In the related art, the thermal management components are connected in parallel by nylon connecting pipes. Due to the existence of assembly tolerance and material tolerance, the assembly difficulty of the thermal management system using this parallel connection mode is large, thereby leading to low assembly efficiency. Moreover, due to the existence of assembly tolerance and material tolerance, the reliability of the thermal management system composed of this parallel connection mode is poor. UTILITY MODEL CONTENT

[0004] Embodiments of the present application provide a current collector, a thermal management component and a battery pack, which can improve the assembly efficiency of the thermal management system.

[0005] In a first aspect, embodiments of the present application provide a current collector, which includes a current collecting unit, the current collecting unit including a main body, a male pipe joint, a female pipe joint and a flexible sleeve; the main body has an inner cavity, a plug-in hole, a first hole and a second hole which are in communication with the inner cavity, the plug-in hole being configured to allow a thermal management plate of a thermal management component to be inserted; the male pipe joint is connected with the main body and in communication with the first hole; the female pipe joint is connected with the main body and in communication with the second hole; the flexible sleeve is connected with one of the male pipe joint and the female pipe joint; the flexible sleeve is configured to be located between the inner circumferential surface of the female pipe joint and the outer circumferential surface of the male pipe joint when the male pipe joint of one current collector is plugged into the female pipe joint of another current collector, and to be in a state of elastic compression in the radial direction.

[0006] In an embodiment, the flexible sleeve is sleeved on the male pipe joint.

[0007] In an embodiment, the flexible sleeve has a first end face away from the main body, the first end face being a conical surface, and the radius of the first end face decreases in turn in the direction away from the main body.

[0008] In an embodiment, the outer peripheral surface of the female pipe joint is provided with a first matching structure; the outer peripheral surface of the male pipe joint is provided with a limiting arm, one end of the limiting arm is connected with the male pipe joint, and the other end is provided with a second matching structure; the first matching structure is configured to be stop matched with the second matching structure in the direction of plugging after the male pipe joint of one current collector is plugged with the female pipe joint of another current collector.

[0009] In an embodiment, the first matching structure is a first wedge-shaped block, and the inclined wedge surface of the first wedge-shaped block is arranged away from the main body; the second matching structure is a groove body; the first wedge-shaped block is configured to be clamped into the groove body and gap matched with the groove body after the male pipe joint of one current collector is plugged with the female pipe joint of another current collector.

[0010] In an embodiment, the female pipe joint is sleeved on the flexible sleeve.

[0011] In an embodiment, the flexible sleeve comprises a first constant-diameter section and a first horn section connected with each other, the outer peripheral surface of the first constant-diameter section is connected with the inner peripheral surface of the female pipe joint, the first horn section is located at one end of the first constant-diameter section away from the main body, and the inner diameter of the first horn section increases in turn in the direction away from the main body.

[0012] In an embodiment, the female pipe joint comprises a second constant-diameter section and a second horn section, the outer peripheral surface of the first constant-diameter section is connected with the inner peripheral surface of the second constant-diameter section, and the outer peripheral surface of the first horn section is connected with the inner peripheral surface of the second horn section.

[0013] In an embodiment, the outer peripheral surface of the male pipe joint is provided with a second wedge-shaped block, the inclined wedge surface of the second wedge-shaped block is away from the main body, and the second wedge-shaped block extends in the form of a ring along the circumference of the male pipe joint.

[0014] In an embodiment, the current collector unit has two, the main bodies of the two current collector units are connected, the plugging holes of the two current collector units are located on the same side of the current collector, the male pipe joints of the two current collector units face the same direction, and the female pipe joints of the two current collector units face the same direction.

[0015] In a second aspect, the embodiments of the present application provide a heat management component, which comprises a heat management plate and the aforementioned current collector; the heat management plate has a flow channel; the plugging end of the heat management plate is inserted into the plugging hole and is in sealed connection with the main body; and the port of the flow channel is in communication with the inner cavity.

[0016] In an embodiment, a sealing adhesive layer is arranged between the plugging end and the inner wall of the plugging hole, and the sealing adhesive layer is glued to the plugging end and the inner wall of the plugging hole.

[0017] In an embodiment, the sealing adhesive layer comprises a first section, the first section is located between the outer peripheral surface of the plugging end and the hole wall of the plugging hole, and along the radial direction of the plugging hole, the first section has a thickness dimension D1, which satisfies: 1mm≤D1≤15mm.

[0018] In an embodiment, the sealing adhesive layer further comprises a second section, a part of the hole bottom of the insertion hole is in communication with the inner cavity, the second section is located between the insertion end and the hole bottom of the insertion hole along the axial direction of the insertion hole, and the second section has a length L1 satisfying 2mm≤L1≤50mm.

[0019] In an embodiment, the current collector comprises two current collection units, the main bodies of the two current collection units are connected, a part of the insertion end is located in the insertion hole of one current collection unit, and another part of the insertion end is located in the insertion hole of the other current collection unit; the flow channel is U-shaped, and the two ports of the flow channel are in communication with the inner cavities of the two current collection units, respectively.

[0020] In a third aspect, the embodiments of the present application provide a battery pack, which comprises a plurality of cell columns and the aforementioned heat management components. The plurality of cell columns are arranged in sequence along a first direction, and each cell column comprises a plurality of cells arranged in sequence along a second direction. The plurality of heat management components are provided. The heat management plates of the plurality of heat management components are arranged in sequence along the first direction. In the adjacent two heat management components, the male pipe joint of one heat management component is inserted into the female pipe joint of the other heat management component. The heat management plates of the plurality of heat management components and the plurality of cell columns are arranged in sequence along the first direction. The first direction is parallel to the direction in which the male pipe joint is inserted into the female pipe joint, and the second direction is parallel to the extension direction of the heat management plate.

[0021] The embodiments of the present application have the following beneficial effects:

[0022] In the embodiments of the present application, by arranging the flexible sleeve, not only the sealing performance of the two current collector insertion positions can be achieved, but also the flexible sleeve can make the male pipe joint and the female pipe joint have a longer sealing length, so that the elastic deformation of the flexible sleeve can absorb the assembly tolerance and the material tolerance, thereby reducing the assembly difficulty and improving the assembly efficiency. BRIEF DESCRIPTION OF DRAWINGS

[0023] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following will briefly introduce the drawings needed in the embodiment description. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can also be obtained by those skilled in the art without any creative effort.

[0024] Figure 1 is a structural diagram of a current collector provided by the embodiments of the present application;

[0025] Figure 2 is another structural diagram of a current collector provided by the embodiments of the present application;

[0026] Figure 3 is a structural diagram of a current collector provided by the embodiments of the present application; Figure 1Structure schematic diagram of two current collectors inserted;

[0027] Figure 4 Structure schematic diagram of two current collectors inserted; Figure 2 Structure schematic diagram of two current collectors inserted;

[0028] Figure 5 Structure schematic diagram of two current collectors inserted; Figure 2 Structure schematic diagram of two current collectors inserted;

[0029] Figure 6 Structure schematic diagram of two current collectors inserted; Structure schematic diagram of two current collectors inserted;

[0030] Structure schematic diagram of two current collectors inserted; Figure 7 Structure schematic diagram of two current collectors inserted; Structure schematic diagram of two current collectors inserted;

[0031] Structure schematic diagram of two current collectors inserted; Figure 8 Structure schematic diagram of two current collectors inserted; Structure schematic diagram of two current collectors inserted;

[0032] Structure schematic diagram of two current collectors inserted; Figure 9 Structure schematic diagram of two current collectors inserted; Figure 8 Structure schematic diagram of two current collectors inserted; Structure schematic diagram of two current collectors inserted;

[0033] Structure schematic diagram of two current collectors inserted; Figure 10 Structure schematic diagram of two current collectors inserted; Figure 8 Structure schematic diagram of two current collectors inserted; Structure schematic diagram of two current collectors inserted;

[0034] Structure schematic diagram of two current collectors inserted; Figure 11 Structure schematic diagram of two current collectors inserted; Figure 9 Structure schematic diagram of two current collectors inserted; Structure schematic diagram of two current collectors inserted;

[0035] Structure schematic diagram of two current collectors inserted; Figure 12 Structure schematic diagram of two current collectors inserted; Figure 10 Structure schematic diagram of two current collectors inserted; Structure schematic diagram of two current collectors inserted;

[0036] Structure schematic diagram of two current collectors inserted; Figure 13 Structure schematic diagram of two current collectors inserted; Structure schematic diagram of two current collectors inserted;

[0037] Structure schematic diagram of two current collectors inserted; Figure 14 Structure schematic diagram of two current collectors inserted. Structure schematic diagram of two current collectors inserted.

[0038] Explanation of reference signs: Structure schematic diagram of two current collectors inserted;

[0039] 1-Current collector; 11-Current collecting unit;

[0040] 12-Body; 121-Internal cavity; 122-Insertion hole; 123-First hole; 124-Second hole;

[0041] 13-Male pipe joint; 131-Limiting arm; 132-Second matching structure; 133-Second wedge block;

[0042] 14-Female pipe joint; 141-First matching structure; 142-Second constant diameter section; 143-Second trumpet section;

[0043] 15 - flexible sleeve; 151 - first end face; 152 - first constant diameter section; 153 - first flared section;

[0044] 2 - thermal management component; 21 - thermal management plate; 22 - flow channel; 23 - plug end; 24 - sealant layer; 241 - first section; 242 - second section;

[0045] 4 - battery pack; 41 - battery cell. DETAILED DESCRIPTION

[0046] The technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work fall within the scope of protection of the present application.

[0047] In addition, it should be understood that the specific embodiments described herein are merely for the purpose of illustration and explanation of the present application, and are not intended to limit the present application. In the present application, the terms "first", "second" are only for the purpose of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features limited by "first", "second" can be explicitly or implicitly included one or more of the features. In the description of the present application, the meaning of "a plurality of" is two or more, unless otherwise explicitly specified and limited.

[0048] In the description of the present application, it should be noted that, unless otherwise explicitly specified and limited, the terms "mounting", "connection", "connection" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the internal communication of two elements or the interaction relationship between two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0049] The term "including", "containing" or any other variant thereof is intended to cover non-exclusive inclusion, so that the product including a series of elements not only includes those elements, but also includes other elements not explicitly listed, or includes elements inherent to such product.

[0050] Please refer to Figure 1 Or Figure 2 , Figure 1 The structure of the current collector 1 provided by the embodiments of the present application is intended to Figure 2is a structural schematic diagram of two busbars 1 plugged together as provided by an embodiment of the present application. An embodiment of the present application provides a busbar 1. The busbar 1 comprises a busbar unit 11. The busbar unit 11 comprises a main body 12, a male pipe joint 13, a female pipe joint 14, and a flexible sleeve 15. The main body 12 has an inner cavity 121, and a plug-in hole 122, a first hole 123, and a second hole 124 in communication with the inner cavity 121. The plug-in hole 122 is configured to have a heat management plate of a heat management component inserted therein. The male pipe joint 13 is connected with the main body 12 and in communication with the first hole 123. The female pipe joint 14 is connected with the main body 12 and in communication with the second hole 124. The flexible sleeve 15 is connected with one of the male pipe joint 13 and the female pipe joint 14. The flexible sleeve 15 is configured to be located between an inner peripheral surface of the female pipe joint 14 and an outer peripheral surface of the male pipe joint 13 when the male pipe joint 13 of one busbar 1 is plugged with the female pipe joint 14 of another busbar 1, and to be in a state of elastic compression in the radial direction, as shown in Figure 3 or Figure 4 as shown, Figure 3 is a structural schematic diagram of two busbars 1 plugged together as provided by an embodiment of the present application. Figure 1 as shown, Figure 4 is a structural schematic diagram of two busbars 1 plugged together as provided by an embodiment of the present application. Figure 2 as shown.

[0051] It can be understood that the sealing cooperation between the male pipe joint 13 and the female pipe joint 14 to be plugged therewith is achieved by elastically compressing the flexible sleeve 15.

[0052] wherein the radial compression amount of the flexible sleeve 15 is E, and 2mm≤E≤8mm is satisfied. In this way, the sealing stability can be effectively ensured, and the operability of plugging the male pipe joint 13 of one busbar 1 with the female pipe joint 14 of another busbar 1 can be effectively ensured.

[0053] It can be understood that the flexible sleeve 15 can be sleeved on the male pipe joint 13, as shown in Figure 1 or the female pipe joint 14 can be sleeved on the flexible sleeve 15, as shown in Figure 2 .

[0054] In addition, when the busbar 1 comprises one busbar unit 11, the busbar unit 11 can serve as an inlet end of a flow channel of the heat management plate, or as an outlet end of the flow channel. When the busbar 1 comprises two busbar units 11, the two busbar units 11 serve as an inlet end and an outlet end of the flow channel of the heat management plate, respectively. At this time, optionally, the two busbar units 11 are connected to perform liquid inlet and liquid outlet at the same end of the heat management plate, so that the structural compactness of the heat management system can be improved.

[0055] In the embodiment, by arranging the flexible sleeve 15, not only the sealing of the two busbar 1 joint positions can be realized, but also a longer sealing length between the male pipe joint 13 and the female pipe joint 14 can be realized by the flexible sleeve 15, so that the assembly tolerance and the material tolerance can be absorbed by the elastic deformation of the flexible sleeve 15, and then the assembly difficulty can be reduced, and the assembly efficiency can be improved.

[0056] In addition, by absorbing the assembly tolerance and the material tolerance by the elastic deformation of the flexible sleeve 15, the stress state of the related components can be improved, and then the connection reliability of the related components can be improved, and the reliability of the thermal management system can be improved.

[0057] Please refer to Figure 1 , the flexible sleeve 15 is sleeved on the male pipe joint 13. In this way, the connection of the flexible sleeve 15 and the male pipe joint 13 can be directly observed, so that the user can quickly judge the quality of the busbar 1, and the assembly efficiency can be improved.

[0058] Among them, the outer diameter of the flexible sleeve 15 is greater than the inner diameter of the female pipe joint 14, and the insertion value between them is the radial compression amount E of the flexible sleeve 15.

[0059] Please refer to Figure 1 , in an embodiment, the flexible sleeve 15 has a first end face 151 away from the main body 12. The first end face 151 is a conical surface. In the direction away from the main body 12, the radius of the first end face 151 decreases in turn. In this way, when the male pipe joint 13 and the female pipe joint 14 are inserted, the conical surface can guide the insertion between them, so that the smoothness of the insertion between them can be improved, and then the assembly efficiency can be improved.

[0060] Please refer to Figure 1 , in an embodiment, the outer periphery of the female pipe joint 14 is provided with a first matching structure 141. The outer periphery of the male pipe joint 13 is provided with a limiting arm 131. One end of the limiting arm 131 is connected with the male pipe joint 13, and the other end is provided with a second matching structure 132. The first matching structure 141 is configured to be stop matched with the second matching structure 132 in the insertion direction after the male pipe joint 13 of one busbar 1 is inserted with the female pipe joint 14 of another busbar 1, as shown in Figure 3 .

[0061] It can be understood that when the male pipe joint 13 and the female pipe joint 14 are inserted, the limiting arm 131 abuts against the first matching structure 141, and as the insertion is carried out, the limiting arm 131 is deformed to move away from the male pipe joint 13, thereby facilitating the insertion of the male pipe joint 13 and the female pipe joint 14. After the male pipe joint 13 and the female pipe joint 14 are inserted in place, the first matching structure 141 and the second matching structure 132 are matched to limit in the insertion direction, preventing the male pipe joint 13 and the female pipe joint 14 from being disengaged.

[0062] In the embodiment, the above scheme can improve the insertion strength and reliability between the male pipe joint 13 and the female pipe joint 14, thereby effectively ensuring the reliability of the sealing between the male pipe joint 13 and the female pipe joint 14.

[0063] Please refer to Figure 1 In an embodiment, the first matching structure 141 is a first wedge-shaped block, and the inclined wedge surface of the first wedge-shaped block is arranged away from the main body 12. The second matching structure 132 is a groove body; the first wedge-shaped block is configured to be clamped into the groove body after the male pipe joint 13 of one current collector 1 is inserted into the female pipe joint 14 of another current collector 1, and gap-matched with the groove body.

[0064] Specifically, the groove body is a through groove, and along the insertion direction between the male pipe joint 13 and the female pipe joint 14, the first wedge-shaped block is stop-matched with the two side groove walls of the groove body. And along the insertion direction, there is a gap between the wedge-shaped block and at least one side groove wall of the groove body. In this way, the matching of the first wedge-shaped block and the groove body can be adaptively adjusted according to assembly errors and material errors, thereby improving the assembly efficiency and the reliability of the structure of the thermal management system.

[0065] In the embodiment, by arranging the groove body on the limiting arm 131, the strength of the male pipe joint 13 and the female pipe joint 14 can be ensured, thereby avoiding deformation and damage of the male pipe joint 13 and the female pipe joint 14 during insertion, and thereby improving the reliability of the structure of the thermal management system.

[0066] Optionally, the first wedge-shaped block extends annularly around the circumference of the female pipe joint 14. In this way, after the male pipe joint 13 and the female pipe joint 14 are inserted, the first wedge-shaped block and the groove body can be matched, thereby reducing the manufacturing difficulty and assembly difficulty.

[0067] In addition to the sealing mode of the flexible sleeve 15 sleeved on the male pipe joint 13 mentioned in the above embodiments, the embodiments of the present application also adopt the following sealing mode.

[0068] Please refer to Figure 2In an embodiment, the female pipe joint 14 is sleeved on the flexible sleeve 15. In this way, the strength of the female pipe joint 14 can be improved, facilitating the interference fit of the female pipe joint 14 and the male pipe joint 13, so that the reliability of the overall structure can be improved.

[0069] The inner diameter of the flexible sleeve 15 is smaller than the outer diameter of the male pipe joint 13, and the insertion value therebetween is the radial compression amount E of the flexible sleeve 15.

[0070] Referring to Figure 5 , Figure 5 The flexible sleeve 15 is provided in the embodiment of the present application Figure 2 The cross-sectional view of the current collector 1 is shown. In an embodiment, the flexible sleeve 15 includes a first constant diameter section 152 and a first horn section 153 connected thereto. The outer peripheral surface of the first constant diameter section 152 is connected to the inner peripheral surface of the female pipe joint 14. The first horn section 153 is located at one end of the first constant diameter section 152 away from the main body 12. In the direction away from the main body 12, the inner diameter of the first horn section 153 increases in turn. In this way, when the male pipe joint 13 and the female pipe joint 14 are inserted, the male pipe joint 13 can be guided by the first horn section 153, so that the smoothness of the insertion therebetween can be improved, and the assembly efficiency can be improved.

[0071] Referring to Figure 5 In an embodiment, the female pipe joint 14 includes a second constant diameter section 142 and a second horn section 143. The outer peripheral surface of the first constant diameter section 152 is connected to the inner peripheral surface of the second constant diameter section 142. The outer peripheral surface of the first horn section 153 is connected to the inner peripheral surface of the second horn section 143. In this way, the connecting surface between the female pipe joint 14 and the flexible sleeve 15 can be increased, so that the reliability of the connection therebetween can be improved.

[0072] Referring to Figure 5 In an embodiment, the outer peripheral surface of the male pipe joint 13 is provided with a second wedge block 133. The inclined wedge surface of the second wedge block 133 is away from the main body 12. And the second wedge block 133 extends in the circumferential direction of the male pipe joint 13 to be annular. In this way, not only can the insertion between the male pipe joint 13 and the female pipe joint 14 be guided by the second wedge block 133 to improve the assembly efficiency, but also the interference amount between the flexible sleeve 15 and the male pipe joint 13 can be increased by the second wedge block 133, so that the sealing between the male pipe joint 13 and the female pipe joint 14 can be improved.

[0073] In an embodiment, the hardness of the flexible sleeve 15 is 40-90 shore A. In this way, the flexible sleeve 15 can meet the sealing requirements between the male pipe joint 13 and the female pipe joint 14.

[0074] In an embodiment, the material of the flexible sleeve 15 is one of the following: EPDM (Ethylene Propylene Diene Rubber), TPE (Thermoplastic Elastomer), TPU (Thermoplastic Polyurethane).

[0075] Among them, EPDM has excellent aging resistance, long service life, and good flexibility at low temperature.

[0076] TPE is a thermoplastic material with good fluidity and plasticity, which can be processed by injection molding, extrusion, blow molding and other methods. The processing process is simple and fast, and the production efficiency is high. At the same time, TPE has good softness, which can better adapt to irregular surfaces in sealing applications and ensure sealing effect.

[0077] TPU has high tensile strength, tear strength and wear resistance, and has good elasticity and resilience.

[0078] In an embodiment, the current collector 1 is an injection molded part. In this way, the molding efficiency of the current collector 1 can be improved, and the weight and manufacturing cost of the thermal management system can be controlled.

[0079] Among them, the main body 12, the male pipe joint 13 and the female pipe joint 14 are injection molded together. The flexible sleeve 15 is injection molded on the male pipe joint 13 or the female pipe joint 14 after the molding of the three.

[0080] Optionally, the material of the current collector 1 is one of the following: PA66 / GF25 (polyamide 66 material containing 25% glass fiber), PA66 / GF30 (polyamide 66 material containing 30% glass fiber), PC / ABS (plastic alloy material composed of polycarbonate and acrylonitrile-butadiene-styrene copolymer).

[0081] Please refer to Figure 1 Or Figure 2 In an embodiment, the current collecting unit 11 has two. The main bodies 12 of the two current collecting units 11 are connected. The plug-in holes 122 of the two current collecting units 11 are located on the same side of the current collector 1. The male pipe joints 13 of the two current collecting units 11 face the same direction. The female pipe joints 14 of the two current collecting units 11 face the same direction.

[0082] Optionally, in each current collecting unit 11, the male pipe joint 13 and the female pipe joint 14 are coaxially arranged.

[0083] In this embodiment, the two current collecting units 11 can be used as the liquid inlet end and the liquid outlet end of the flow channel of the thermal management plate respectively, so as to perform liquid inlet and liquid outlet at the same end of the thermal management plate, thereby improving the structural compactness of the thermal management system.

[0084] In an embodiment, the depth dimension of the male pipe joint 13 inserted into the female pipe joint 14 is s1, and the length of the flexible sleeve 15 sleeved at the position of radial compression is s2, which satisfies: 70% s1≤s2≤s1. In this way, a larger sealing surface between the male pipe joint 13 and the female pipe joint 14 can be effectively ensured, so as to improve the reliability of the sealing therebetween.

[0085] Please refer to Figure 6 , Figure 6 is a structural schematic diagram of a heat management component 2 provided by an embodiment of the present application. Accordingly, an embodiment of the present application provides a heat management component 2. The heat management component 2 comprises a heat management plate 21 and the aforementioned current collector 1. The heat management plate 21 has flow channels 22. The plug-in end 23 of the heat management plate 21 is inserted into the plug-in hole 122 and is in sealing connection with the main body 12. The ports of the flow channels 22 are in communication with the inner cavity 121.

[0086] It can be understood that the sealing connection between the heat management plate 21 and the main body 12 can be realized by setting a sealing glue, or can be realized by setting a sealing ring.

[0087] Optionally, the plate body of the heat management plate 21 is in a harmonica tube structure, and a plurality of flow channels 22 are arranged inside the plate body, as shown in Figure 7 , Figure 7 is a structural schematic diagram of the heat management plate 21 provided by an embodiment of the present application.

[0088] In the embodiment, by adopting the current collector 1 provided by some embodiments of the present application, not only the sealing of the two plug-in positions of the current collector 1 can be realized by the flexible sleeve 15, but also the male pipe joint 13 and the female pipe joint 14 have a longer sealing length by the flexible sleeve 15, so that the assembly tolerance and the material tolerance can be absorbed by the elastic deformation of the flexible sleeve 15, and then the assembly difficulty between the heat management components 2 can be reduced to improve the assembly efficiency.

[0089] Please refer to Figure 8 , Figure 9 and Figure 10 , Figure 8 is a top view of the heat management component 2 provided by an embodiment of the present application, Figure 9 is Figure 8 is a sectional view of A-A in Figure 10 is Figure 8 is a sectional view of B-B in. In an embodiment, a sealing glue layer 24 is arranged between the plug-in end 23 and the inner wall of the plug-in hole 122. The sealing glue layer 24 is glued with the plug-in end 23 and the inner wall of the plug-in hole 122. In this way, not only the assembly efficiency between the heat management plate 21 and the current collector 1 can be improved and the manufacturing cost can be reduced, but also the lightweight design of the heat management system can be facilitated.

[0090] The glue forming the sealing glue layer 24 can be made of a silane system, an epoxy system, a polyurethane system, or the like.

[0091] Exemplarily, along the axial direction of the insertion hole 122, the depth of the thermal management plate 21 inserted into the insertion hole 122 is C, and the length of the sealing glue layer 24 is D, which satisfies C+2mm≤D≤C+50mm.

[0092] Please refer to Figure 9 and Figure 11 , Figure 11 is Figure 9 the enlarged view of C in FIG. 4. In an embodiment, the sealing glue layer 24 includes a first section 241. The first section 241 is located between the outer circumferential surface of the insertion end 23 and the hole wall of the insertion hole 122. Along the radial direction of the insertion hole 122, the first section 241 has a thickness D1, which satisfies 1mm≤D1≤15mm.

[0093] The thickness D1 of the first section 241 includes but is not limited to 2mm, 3mm, 4mm, 6mm, 7mm, 8mm, 10mm, 12mm, 13mm, 14mm, and 15mm.

[0094] In the embodiment, the above setting can improve the connection strength and the sealing property between the thermal management plate 21 and the current collector 1, and improve the reliability of the thermal management component 2. In addition, the size of the thermal management component 2 is not too large, which is beneficial to ensure the compactness of the battery design.

[0095] In addition, along the axial direction of the insertion hole 122, the length of the first section 241 is consistent with the depth C of the thermal management plate 21 inserted into the insertion hole 122.

[0096] Please refer to Figure 10 and Figure 12 , Figure 12 is Figure 10 the enlarged view of D in FIG. 4. In an embodiment, the sealing glue layer 24 further includes a second section 242. Part of the hole bottom of the insertion hole 122 is in communication with the inner cavity 121. The second section 242 is located between the insertion end 23 and the hole bottom of the insertion hole 122. Along the axial direction of the insertion hole 122, the second section 242 has a length L1, which satisfies 2mm≤L1≤50mm.

[0097] The length dimension L1 of the second section 242 includes, but is not limited to, 2 mm, 3 mm, 4 mm, 6 mm, 7 mm, 8 mm, 10 mm, 12 mm, 13 mm, 14 mm, 16 mm, 17 mm, 18 mm, 20 mm, 22 mm, 23 mm, 24 mm, 26 mm, 27 mm, 28 mm, 30 mm, 32 mm, 33 mm, 34 mm, 36 mm, 37 mm, 38 mm, 40 mm, 42 mm, 43 mm, 44 mm, 46 mm, 47 mm, 28 mm, or 50 mm.

[0098] In the embodiment, through the above arrangement, the connection strength and the sealing between the thermal management plate 21 and the current collector 1 can be improved, and the reliability of the thermal management component 2 can be improved; meanwhile, the size of the thermal management component 2 is not excessively large, and the compactness of the battery design can be ensured.

[0099] The insertion hole 122 is a tapered hole, and the hole diameter gradually decreases as it approaches the inner cavity 121. When the insertion hole 122 is a tapered hole, the thickness dimension D1 of the first section 241 refers to the thickness dimension between the end peripheral edge of the insertion end 23 and the hole wall of the tapered hole.

[0100] In an embodiment, the material of the thermal management plate 21 is ternary aluminum, and the thermal expansion coefficient of the current collector 1 is 15x10-6 / ℃~30x10-6 / ℃. In this way, the thermal management plate 21 has good thermal conductivity, and the thermal expansion coefficient of the current collector 1 is close to that of the thermal management plate 21, so that the cracks on the joint surface between the current collector 1 and the thermal management plate 21 caused by thermal expansion and contraction can be effectively avoided.

[0101] In an embodiment, the material of the current collector 1 is one of the following materials: PA66 / GF25, PA66 / GF30, and PC / ABS. In this way, the thermal expansion coefficient of the current collector 1 is close to that of the thermal management plate 21, and the application scenario requirements of the current collector 1 can be met.

[0102] Please refer to Figure 6 In an embodiment, the current collector 1 includes two current collecting units 11. The main bodies 12 of the two current collecting units 11 are connected. One part of the insertion end 23 is located in the insertion hole 122 of one current collecting unit 11, and the other part is located in the insertion hole 122 of the other current collecting unit 11. The flow channel 22 is U-shaped, and the two ports thereof are respectively in communication with the inner cavities 121 of the two current collecting units 11.

[0103] In the embodiment, the two current collecting units 11 can respectively serve as the liquid inlet end and the liquid outlet end of the flow channel 22 of the thermal management plate 21, so that the liquid inlet and the liquid outlet are performed at the same end of the thermal management plate 21, and the structural compactness of the thermal management system can be improved.

[0104] Referring to Figure 6 In an embodiment, the heat management plate 21 is a serpentine plate. In this way, when it is applied to a cylindrical battery cell, it can have a larger contact surface with the cylindrical battery cell, thereby improving the heat management efficiency.

[0105] Exemplarily, the plate body of the heat management plate 21 is a harmonica tube structure, and an insulating layer is arranged on the surface of the harmonica tube structure.

[0106] Optionally, the insulating layer can be epoxy resin powder sprayed on the surface of the heat management plate 21, or can be an insulating film attached to the surface of the heat management plate 21. The material of the insulating film includes but is not limited to PET, PI, PVC, and PI+PET composite material.

[0107] Compared with the sprayed epoxy resin powder, the insulating film can make the thickness of the insulating layer more accurate, and the setting cost of the insulating layer is lower. The selection of PET, PI, PVC, and PI+PET composite material can effectively ensure the insulation stability and pressure withstand of the insulating film attached to the serpentine tube.

[0108] Referring to Figure 14 The embodiment of the present application provides a battery pack 4, which comprises a plurality of battery cell columns and the aforementioned heat management component. The plurality of battery cell columns are arranged in sequence along a first direction, and each battery cell column comprises a plurality of battery cells 41 arranged in sequence along a second direction; and the plurality of heat management components 2 are provided. Along the first direction, the heat management plates 21 of the plurality of heat management components 2 are arranged in sequence. In the adjacent two heat management components 2, the male pipe joint 13 of one heat management component 2 is inserted into the female pipe joint 14 of the other heat management component 2, as shown in Figure 13 . Figure 13 is a structural schematic diagram of the connection of the plurality of heat management components provided by the embodiment of the present application. Along the first direction, the heat management plates 21 of the plurality of heat management components 2 are staggered and distributed with the plurality of battery cell columns. The first direction is parallel to the direction in which the male pipe joint 13 is inserted into the female pipe joint 14, and the second direction is parallel to the extension direction of the heat management plate.

[0109] It can be understood that the battery pack 4 further comprises a temperature adjusting module, a working pump, and a pipeline. The pipeline connects the heat management component 2 and the temperature adjusting module. The temperature adjusting module adjusts the temperature of the heat exchange medium in the pipeline. The working pump delivers the heat exchange medium adjusted by the temperature adjusting module into the flow channel 22 of the heat management component 2, and delivers the heat exchange medium exchanged with the battery cell 41 of the heat management component 2 into the temperature adjusting module.

[0110] It can be understood that the battery pack 4 further comprises a battery box, a connection row and other components. The battery cell 41 and the heat management component 2 are arranged in the battery box. The connection row connects the plurality of battery cells 41 in series or in parallel.

[0111] In the embodiment, by adopting the heat management component 2 provided by some embodiments of the present application, the assembly tolerance and the material tolerance can be absorbed by the elastic deformation of the flexible sleeve 15, and the assembly difficulty can be reduced to improve the assembly efficiency.

[0112] The above has carried out the detailed introduction to the embodiment of the application, the principle and implementation mode of the application are described in this paper by applying specific examples, the above embodiment explanation is only for helping understanding the method of the application and its core idea; at the same time, for the skilled in the art, according to the idea of the present application, the specific implementation mode and application range will have changes, and the above-mentioned description should not be understood as the limitation of the present application.

Claims

1. A current collector characterized by comprising: The current application relates to a current collector unit, comprising: a main body having an inner cavity, a plug-in hole, a first hole and a second hole in communication with the inner cavity, the plug-in hole being configured for insertion of a heat management plate of a heat management component; a male pipe joint connected with the main body and in communication with the first hole; a female pipe joint connected with the main body and in communication with the second hole; a flexible sleeve connected with one of the male pipe joint and the female pipe joint; wherein the flexible sleeve is configured to be located between the inner peripheral surface of the female pipe joint and the outer peripheral surface of the male pipe joint when the male pipe joint of one current collector unit is plugged into the female pipe joint of another current collector unit, and to be in a state of elastic compression in the radial direction.

2. The current collector of claim 1, wherein The flexible sleeve is sleeved on the male pipe joint.

3. The current collector of claim 2, wherein The flexible sleeve has a first end surface facing away from the main body, the first end surface being a conical surface, and the radius of the first end surface decreases in sequence in the direction away from the main body.

4. The current collector of claim 2, wherein The outer peripheral surface of the female pipe joint is provided with a first matching structure, and the outer peripheral surface of the male pipe joint is provided with a limiting arm, one end of the limiting arm being connected with the male pipe joint and the other end being provided with a second matching structure; wherein the first matching structure is configured to be stop matched with the second matching structure in the direction of plugging after the male pipe joint of one current collector unit is plugged into the female pipe joint of another current collector unit.

5. The current collector of claim 4, wherein The first matching structure is a first wedge-shaped block, and the inclined wedge surface of the first wedge-shaped block faces away from the main body; the second matching structure is a groove body; wherein the first wedge-shaped block is configured to be clamped into the groove body and to be gap matched with the groove body after the male pipe joint of one current collector unit is plugged into the female pipe joint of another current collector unit.

6. The current collector of claim 1, wherein The female pipe joint is sleeved on the flexible sleeve.

7. The current collector of claim 6, wherein The flexible sleeve comprises a first constant-diameter section and a first horn section connected with each other, the outer peripheral surface of the first constant-diameter section being connected with the inner peripheral surface of the female pipe joint, and the first horn section being located at one end of the first constant-diameter section away from the main body, and the inner diameter of the first horn section increases in sequence in the direction away from the main body.

8. The current collector of claim 7, wherein The female pipe joint comprises a second constant-diameter section and a second horn section, the outer peripheral surface of the first constant-diameter section being connected with the inner peripheral surface of the second constant-diameter section, and the outer peripheral surface of the first horn section being connected with the inner peripheral surface of the second horn section.

9. The current collector of claim 6, wherein The outer peripheral surface of the male pipe joint is provided with a second wedge-shaped block, the inclined wedge surface of the second wedge-shaped block facing away from the main body, and the second wedge-shaped block extending in the form of a ring along the circumferential direction of the male pipe joint.

10. The current collector of any one of claims 1-9, wherein, The current collector unit has two, the main bodies of the two current collector units are connected, the plug-in holes of the two current collector units are located on the same side of the current collector, the male pipe joints of the two current collector units face the same direction, and the female pipe joints of the two current collector units face the same direction.

11. A thermal management component, characterized by, The current application relates to a current collector unit, comprising: a heat management plate having a flow channel; and the current collector unit as claimed in any one of claims 1-10; the plug-in end of the heat management plate is inserted into the plug-in hole and is in sealed connection with the main body; wherein the port of the flow channel is in communication with the inner cavity.

12. The thermal management component of claim 11, wherein, A sealing glue layer is arranged between the plug end and the inner wall of the plug hole, and the sealing glue layer is glued to the plug end and the inner wall of the plug hole.

13. The thermal management component of claim 12, wherein, The sealing glue layer includes a first section, which is located between the outer circumferential surface of the plug end and the hole wall of the plug hole, and has a thickness D1 in the radial direction of the plug hole, satisfying 1mm≤D1≤15mm.

14. The thermal management component of claim 13, wherein, The sealing glue layer further includes a second section, which is located between the plug end and the hole bottom of the plug hole, and has a length L1 in the axial direction of the plug hole, satisfying 2mm≤L1≤50mm.

15. The thermal management component of any of claims 11-14, wherein, The current collector includes two current collection units, the main bodies of which are connected, and a part of the plug end is located in the plug hole of one current collection unit and another part of the plug end is located in the plug hole of the other current collection unit; the flow channel is U-shaped, and two ports of the flow channel are respectively connected to the inner cavities of the two current collection units.

16. A battery pack, characterized by Comprise: a plurality of cell columns arranged in sequence along a first direction, each cell column comprising a plurality of cells arranged in sequence along a second direction; and the thermal management component of any one of claims 11-15, there are a plurality of thermal management components; along the first direction, the thermal management plates of the plurality of thermal management components are arranged in sequence; in adjacent two thermal management components, the male pipe joint of one thermal management component is plugged into the female pipe joint of the other thermal management component; along the first direction, the thermal management plates of the plurality of thermal management components and the plurality of cell columns are staggered in sequence; wherein the first direction is parallel to the direction in which the male pipe joint is plugged into the female pipe joint, and the second direction is parallel to the extension direction of the thermal management plate.

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