Cabin penetrating piece and battery pack

Abstract

The utility model relates to the technical field of batteries, in particular to a cabin penetrating piece and a battery pack. A threading hole for a wire harness to penetrate through is formed in the cabin penetrating piece in the axial direction in a penetrating mode, and colloid is filled in the threading hole in a sealed mode. The cabin penetrating piece comprises a plugging part and a plugging part, the plugging part can be arranged in a cabin penetrating hole of a box body of the battery pack in a penetrating manner, the plugging part is convexly arranged at the first axial end of the plugging part, the end surface of the first end is provided with a gluing area which is arranged around the circumferential direction of the plugging part, and the gluing area is coated with glue; the end face of the first end is attached to the wall plate, provided with the cabin penetrating hole, of the box body in a sealed mode. The battery pack comprises the cabin penetrating piece, the plugging part of the cabin penetrating piece is arranged in the cabin penetrating hole of the box body of the battery pack in a penetrating mode, the first end of the plugging part is attached to the wall plate, provided with the cabin penetrating hole, of the box body in a sealed mode through the colloid in the gluing area, and the cabin penetrating piece is installed in the box body in a sealed mode. And meanwhile, the colloid is filled in the threading hole in a sealing manner, so that the sealing installation of the wire harness in the cabin penetrating part is realized, and the sealing performance and the protection grade of the battery pack are improved.

Description

Technical Field

[0001] The utility model relates to the technical field of batteries, in particular to a cabin penetration component and a battery pack. Background Art

[0002] In an immersion battery pack, a cooling medium is provided in the box of the battery pack, and the battery cells are immersed in the cooling medium so as to utilize the cooling medium to exchange heat with the battery cells to achieve cooling of the battery cells.

[0003] During the thermal runaway test of the immersed battery pack, the thermocouple is built into the battery cell inside the box, and the thermocouple wire needs to be led out of the box to transmit the collected battery cell temperature changes to the test platform. In the existing immersed battery pack, it is necessary to punch a hole in the box to meet the needs of the thermocouple wire to penetrate the box. However, there may be a gap between the thermocouple wire and the hole, which reduces the sealing of the box and makes it difficult to achieve the protection level required by the battery pack box. Utility Model Content

[0004] The utility model aims to provide a cabin penetration component and a battery pack to solve the technical problem in the prior art that the sealing performance of the battery pack box is poor when a cabin penetration occurs.

[0005] To achieve this purpose, the technical solution adopted by the utility model is:

[0006] A cabin penetration member, wherein the cabin penetration member is provided with a threading hole for the wiring harness to pass through along the axial direction, and the threading hole is sealed and filled with colloid;

[0007] The penetration part includes a sealing portion and a plug-in portion, the sealing portion can be inserted into the penetration hole of the battery pack box, the sealing portion is protruded from the first axial end of the plug-in portion, and the end face of the first end has a glue-coated area circumferentially arranged around the sealing portion, the glue-coated area is coated with the colloid, so that the end face of the first end is sealed and fits on the wall panel of the box having the penetration hole.

[0008] As a preferred embodiment, a first glue overflow groove is provided at one end of the sealing portion away from the plug-in portion, and the first glue overflow groove is connected to one end of the threading hole; and / or a second glue overflow groove is provided at the second axial end of the plug-in portion, and the second glue overflow groove is connected to the other end of the threading hole.

[0009] As a preferred solution, a third glue overflow groove is circumferentially arranged on the end surface of the first end of the plug-in portion around the blocking portion, and an open end of the third glue overflow groove is communicated with the glue coating area.

[0010] As a preferred solution, the cross-sectional area of ​​the threading hole is 1.3 to 1.5 times the cross-sectional area of ​​the wire harness.

[0011] As a preferred solution, the axial length of the threading hole is 20 mm to 40 mm.

[0012] As a preferred solution, the cabin penetration member is a stepped shaft structure, the diameter of the blocking portion is smaller than the diameter of the plug-in portion, and the glue-coated area is in a circular ring shape.

[0013] As a preferred solution, the threading hole is a circular hole coaxial with the blocking portion, and the diameter of the blocking portion is 3 to 8 times the diameter of the threading hole.

[0014] As a preferred solution, the difference between the diameter of the plugging portion and the diameter of the blocking portion is 30 mm to 80 mm.

[0015] As a preferred solution, the difference between the outer diameter of the glue-coated area and the inner diameter of the glue-coated area is greater than 10 mm.

[0016] A battery pack, including the above-mentioned cabin penetration member.

[0017] The beneficial effects of the utility model are:

[0018] The piercing member proposed in the utility model has a blocking portion that penetrates the piercing hole of the battery pack box, and a glue coating area at the first end of the plug-in portion of the piercing member is coated with a colloid, so that the first end of the plug-in portion can be sealed and fitted to the wall plate of the box with the piercing hole, thereby realizing the sealed installation of the piercing member on the box. At the same time, the wiring harness in the box passes through the threading hole of the piercing member, and the threading hole is sealed and filled with a colloid, so that the wiring harness is fixed by the colloid and the threading hole is sealed and blocked, thereby realizing the sealed installation of the wiring harness on the piercing member, avoiding the occurrence of a gap between the wiring harness and the piercing hole, and improving the sealing performance and protection level of the box.

[0019] The battery pack proposed in the utility model includes the above-mentioned cabin penetration member. By installing the cabin penetration member in the cabin penetration hole of the box body, the wiring harness is sealed and installed with the box body through the cabin penetration member, which meets the cabin penetration requirements of the wiring harness and improves the sealing performance and protection level of the battery pack. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a partial structural schematic diagram of a battery pack provided by an embodiment of the utility model;

[0021] Figure 2 is a longitudinal cross-sectional view of a cabin penetration member provided in an embodiment of the utility model;

[0022] Figure 3 This is a schematic diagram of the structure of the cabin penetration member provided in the embodiment of the utility model. Figure 1 ;

[0023] Figure 4 This is a schematic diagram of the structure of the cabin penetration member provided in the embodiment of the utility model. Figure 2 .

[0024] The names and numbers of the components in the figure are as follows:

[0025] 100, box body; 101, wall panel; 102, through hole; 200, wiring harness;

[0026] 1. Cabin penetration part; 10. Threading hole; 11. Sealing part; 111. First glue overflow groove; 12. Plug-in part; 121. Glue coating area; 122. Second glue overflow groove; 123. Third glue overflow groove. DETAILED DESCRIPTION

[0027] In order to make the technical problems solved by the present invention, the technical solutions adopted and the technical effects achieved clearer, the technical solutions of the present invention are further described below in conjunction with the accompanying drawings and through specific implementation methods. It is understood that the specific embodiments described herein are only used to explain the present invention, rather than to limit the present invention. It should also be noted that, for the convenience of description, only the parts related to the present invention are shown in the accompanying drawings, rather than all of them.

[0028] In the description of the present invention, unless otherwise clearly specified and limited, the terms "connected", "connected", and "fixed" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0029] In the present utility model, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0030] In the description of this embodiment, the terms "upper", "lower", "right", "left" and other directions or positional relationships are based on the directions or positional relationships shown in the drawings, and are only for the convenience of description and simplified operation, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation of the present invention. In addition, the terms "first" and "second" are only used to distinguish in the description and have no special meaning.

[0031] The technical solution of the utility model is further explained below with reference to the accompanying drawings and through specific implementation methods.

[0032] This embodiment proposes a battery pack that can be used in power usage scenarios such as energy storage systems and new energy vehicles. Figure 1 As shown, the battery pack of this embodiment can be an immersed battery pack, which includes a box 100, a battery cell and a thermocouple, etc. A cooling medium is arranged in the box 100, and the battery cell is immersed in the cooling medium, so as to utilize the cooling medium to exchange heat with the battery cell to achieve cooling of the battery cell. Of course, the battery pack of this embodiment can also be a non-immersed battery pack, which is not specifically limited here.

[0033] During the thermal runaway test of the battery pack, the thermocouple is built into the box 100 and is used to measure the temperature change of the battery cell after thermal runaway occurs. The thermocouple wire needs to be led out from the box 100 to transmit the collected battery cell temperature change to the test platform. In the existing immersion battery pack, it is necessary to punch a hole in the box to meet the needs of the thermocouple wire to penetrate the cabin. However, there may be a gap between the thermocouple wire and the hole, which destroys the sealing of the box and makes it difficult to achieve the higher protection level required by the battery pack.

[0034] To solve the above problems, Figure 1 to Figure 3As shown, the present embodiment further proposes a cabin penetration member 1, which is used in the thermal runaway test process of the above-mentioned immersed battery pack. Of course, the cabin penetration member 1 can also be used in other assembly operations that require cabin penetration and wiring. Specifically, the cabin penetration member 1 is axially penetrated with a threading hole 10 for the wiring harness 200 to pass through, and the threading hole 10 is sealed and filled with a colloid. The cabin penetration member 1 includes a sealing portion 11 and a plug-in portion 12. The sealing portion 11 can be inserted into the cabin penetration hole 102 of the battery pack box 100. The plug-in portion 12 is convexly provided with the sealing portion 11 at the first axial end, and the end face of the first end has a glue coating area 121 circumferentially arranged around the sealing portion 11. The glue coating area 121 is coated with a colloid so that the end face of the first end is sealed and fits on the wall panel 101 of the box 100 having the cabin penetration hole 102. By inserting the blocking portion 11 of the cabin penetration member 1 into the cabin penetration hole 102 of the battery pack box 100, the glue coating area 121 of the first end of the plug-in portion 12 of the cabin penetration member 1 is coated with a colloid, so that the first end of the plug-in portion 12 is sealed and attached to the wall plate 101 of the box 100 with the cabin penetration hole 102, and the sealed installation of the cabin penetration member 1 on the box 100 is achieved. At the same time, the wire harness 200 in the box 100 passes through the threading hole 10 of the cabin penetration member 1, and the threading hole 10 is sealed and filled with a colloid, so that the wire harness 200 is fixed by the colloid and the threading hole 10 is sealed and blocked, and the sealed installation of the wire harness 200 on the cabin penetration member 1 is achieved, so as to avoid a gap between the wire harness 200 and the cabin penetration hole 102, thereby improving the sealing performance and protection level of the box 100. The above-mentioned colloid can be a structural adhesive, which has good bonding performance and low cost.

[0035] In the present embodiment, the cabin penetration member 1 is a rubber member, which has good elastic-plastic properties and is easy to be injection molded. The sealing portion 11 and the plug-in portion 12 are integrally molded by injection molding, which is simple to process and has high processing efficiency. In other embodiments, the cabin penetration member 1 can also be made of other materials, which are not specifically limited here. Specifically, the cabin penetration member 1 is a stepped shaft structure, that is, the sealing portion 11 and the plug-in portion 12 are both cylindrical structures, and the diameter of the sealing portion 11 is smaller than the diameter of the plug-in portion 12, so that the end face of the first end of the plug-in portion 12 forms a stepped surface of the cabin penetration member 1, so as to realize the positioning and installation of the cabin penetration member 1, and the first end of the plug-in portion 12 has a rubber coating area 121.

[0036] Since the glue coating area 121 is circumferentially arranged around the sealing part 11, the glue coating area 121 is in a circular ring shape. The threading hole 10 is a circular hole coaxial with the sealing part 11, and the wiring harness 200 is a thermocouple wire but is not limited thereto. The thermocouple wire can be one or more. The cross-sectional area of ​​the threading hole 10 is 1.3 to 1.5 times the cross-sectional area of ​​the wiring harness 200, so that the cross-sectional area of ​​the threading hole 10 is 30% to 50% larger than the cross-sectional area of ​​the wiring harness 200, so as to ensure that the wiring harness 200 can smoothly pass through the threading hole 10, reduce the difficulty of threading, and improve the threading efficiency. Moreover, the threading hole 10 has a suitable diameter to avoid the overall size of the piercing part 1 being too large. It should be noted that when there are multiple wire harnesses 200, the cross-sectional area of ​​the wire harness 200 refers to the sum of the cross-sectional areas of all the wire harnesses 200 passing through the threading hole 10.

[0037] like Figure 2 and Figure 3 As shown, a first glue overflow groove 111 is provided at one end of the sealing portion 11 away from the plug-in portion 12, and the first glue overflow groove 111 is connected to one end of the threading hole 10. The first glue overflow groove 111 is used to store excess glue in the threading hole 10 to prevent excess glue from overflowing to the outside of the cabin penetration member 1 and causing pollution. Figure 2 and Figure 4 As shown, the second axial end of the plug-in portion 12 is provided with a second glue overflow groove 122, and the second glue overflow groove 122 is connected to the other end of the threading hole 10. The second glue overflow groove 122 is also used to store excess colloid in the threading hole 10 to prevent excess colloid from overflowing to the outside of the cabin penetration part 1 and causing pollution. The cabin penetration part 1 of this embodiment has a first glue overflow groove 111 and a second glue overflow groove 122 at both axial ends, respectively, and the first glue overflow groove 111 and the second glue overflow groove 122 are connected through the threading hole 10. In other embodiments, the first glue overflow groove 111 may be provided only at the end of the sealing portion 11 away from the plug-in portion 12, or the second glue overflow groove 122 may be provided only at the second axial end of the plug-in portion 12.

[0038] like Figure 2 and Figure 3 As shown, the end surface of the first end of the plug-in portion 12 is circumferentially provided with a third glue overflow groove 123 around the blocking portion 11, and the open end of the third glue overflow groove 123 is connected to the glue coating area 121. Specifically, the end surface of the first end of the plug-in portion 12 is concave to form the third glue overflow groove 123. When the cabin penetration component 1 is installed in the cabin penetration hole 102 of the box body 100, the end surface of the first end of the plug-in portion 12 is tightly attached to the wall plate 101 of the box body 100 having the cabin penetration hole 102. The glue in the glue coating area 121 can enter the third glue overflow groove 123 after being squeezed, so as to prevent the excess glue from overflowing to the outside of the cabin penetration component 1 and causing pollution.

[0039] In an optional embodiment, the axial length of the threading hole 10 is 20 mm to 40 mm. Figure 2As shown, the axial length L of the threading hole 10 can be 20mm, 25mm, 30mm, 35mm, 40mm, etc., to ensure that the length of the threading hole 10 is moderate. When the axial length L of the threading hole 10 is too small, the colloid in the threading hole 10 is too little, and it is difficult to completely seal the threading hole 10, and the sealing of the cabin penetration part 1 cannot be ensured. When the axial length L of the threading hole 10 is too long, not only the amount of colloid used is increased, but also the overall length of the cabin penetration part 1 is too long, which is not conducive to the miniaturization of the cabin penetration part 1.

[0040] In an optional embodiment, the diameter D2 of the plugging portion 11 is 3 to 8 times the diameter D1 of the threading hole 10, so that the end of the plugging portion 11 away from the plugging portion 12 has a sufficient end surface area, and a space is reserved for the first glue overflow groove 111. The difference between the diameter D3 of the plugging portion 12 and the diameter D2 of the plugging portion 11 is 30 mm to 80 mm, so that the first end of the plugging portion 12 has a sufficient end surface area, and a space is reserved for the glue coating area 121 and the third glue overflow groove 123. The difference between the outer diameter D4 of the glue-coated area 121 and the inner diameter of the glue-coated area 121 (i.e., the diameter D2 of the sealing portion 11) is greater than 10 mm, so that the radial width of the glue-coated area 121 is greater than 5 mm, ensuring that the glue-coated area 121 has sufficient glue coating area, thereby improving the bonding effect between the end face of the first end of the plug-in portion 12 and the wall panel 101 of the box body 100 having the cabin hole 102, thereby improving the sealing performance of the cabin penetration component 1 after being assembled in the box body 100.

[0041] It should be noted that the outer edge of the end of the plugging portion 11 away from the plugging portion 12 is provided with a rounded corner. By providing the rounded corner of the outer edge of the end of the plugging portion 11 away from the plugging portion 12, the outer edge of the end of the plugging portion 11 away from the plugging portion 12 forms a guiding arc surface to guide the plugging portion 11 to be quickly inserted into the cabin penetration hole 102, which is beneficial to improving the installation efficiency of the cabin penetration component 1.

[0042] In this embodiment, the outer edges of the first and second axial ends of the plug-in portion 12 are both provided with chamfers. Specifically, the outer edges of the first and second axial ends of the plug-in portion 12 are both provided with right-angle structures to remove burrs at the edges of the plug-in portion 12 and improve the quality of the cabin penetration member 1. At the same time, a right-angle structure is provided at the first axial end of the plug-in portion 12 to facilitate the pick-up and placement operation when manually plugging and unplugging the cabin penetration member 1, so as to quickly install the cabin penetration member 1 to the box body 100 or quickly pull out the cabin penetration member 1 from the box body 100, thereby reducing the difficulty of disassembling and assembling the cabin penetration member 1 and improving the disassembly and assembly efficiency of the cabin penetration member 1.

[0043] The above embodiments are only to illustrate the basic principles and characteristics of the present invention. The present invention is not limited by the above embodiments. Without departing from the spirit and scope of the present invention, the present invention may be subject to various changes and modifications, which are within the scope of the present invention. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. A cabin penetration member, characterized in that: The cabin penetration member (1) is provided with a threading hole (10) penetrating along the axial direction for the wire harness (200) to pass through, and the threading hole (10) is sealed and filled with colloid; The penetration member (1) comprises a sealing portion (11) and an insertion portion (12); the sealing portion (11) can be inserted into a penetration hole (102) of a battery pack case (100); the sealing portion (11) is protruded from a first axial end of the insertion portion (12); and an end surface of the first end has a glue coating area (121) circumferentially arranged around the sealing portion (11); the glue coating area (121) is coated with the glue, so that the end surface of the first end is sealed and fitted to a wall panel (101) of the case (100) having the penetration hole (102).

2. The cabin penetration member according to claim 1, characterized in that: A first glue overflow groove (111) is provided at one end of the sealing portion (11) away from the plug-in portion (12), and the first glue overflow groove (111) is connected to one end of the threading hole (10); and / or a second glue overflow groove (122) is provided at the second axial end of the plug-in portion (12), and the second glue overflow groove (122) is connected to the other end of the threading hole (10).

3. The cabin penetration member according to claim 1, characterized in that: A third glue overflow groove (123) is circumferentially arranged on the end surface of the first end of the plug-in portion (12) around the blocking portion (11), and the open end of the third glue overflow groove (123) is in communication with the glue coating area (121).

4. The cabin penetration member according to claim 1, characterized in that: The cross-sectional area of ​​the threading hole (10) is 1.3 to 1.5 times the cross-sectional area of ​​the wire harness (200).

5. The cabin penetration member according to claim 1, characterized in that: The axial length of the threading hole (10) is 20 mm to 40 mm.

6. The cabin penetration member according to any one of claims 1 to 5, characterized in that: The cabin penetration member (1) is a stepped shaft structure, the diameter of the blocking portion (11) is smaller than the diameter of the plug-in portion (12), and the glue coating area (121) is in the shape of a circular ring.

7. The cabin penetration member according to claim 6, characterized in that: The threading hole (10) is a circular hole coaxial with the blocking portion (11), and the diameter of the blocking portion (11) is 3 to 8 times the diameter of the threading hole (10).

8. The cabin penetration member according to claim 7, characterized in that: The difference between the diameter of the plug-in portion (12) and the diameter of the blocking portion (11) is 30 mm to 80 mm.

9. The cabin penetration member according to claim 6, characterized in that: The difference between the outer diameter of the glue coating area (121) and the inner diameter of the glue coating area (121) is greater than 10 mm.

10. A battery pack, characterized in that: The invention comprises the cabin penetration member according to any one of claims 1 to 9.

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