A battery pack and an electric device

Abstract

The embodiment of the application provides a battery pack and a power utilization device, which comprise a shell, a battery module and a sealing structure; the shell is provided with a connector; the battery module is arranged in the shell; the battery module comprises an encapsulation structure, a battery assembly and a wire harness connected with the battery assembly; the battery assembly is arranged in the encapsulation structure; at least part of the wire harness extends to outside of the encapsulation structure and is connected with the connector; the sealing structure is arranged between the shell and the encapsulation structure; the sealing structure is arranged in extension along the circumference of the connector and the wire harness, so that the connection position of the connector and the wire harness is located in a closed space. By arranging the sealing structure, the failure risk of the connector can be reduced, the wire harness and the connector can be waterproofed, and therefore the use reliability of the battery pack can be improved.

Description

Technical Field

[0001] This application belongs to the field of battery technology, specifically relating to a battery pack and an electrical device. Background Technology

[0002] The battery pack is a core component of new energy vehicles, typically consisting of a housing and battery modules housed within it. The housing contains connectors, and the battery modules include battery components and wiring harnesses that connect to them. The connection between the wiring harnesses and connectors enables the battery components to output electrical energy.

[0003] In related technologies, adhesive is typically injected into the gap between the casing and the battery module to achieve waterproofing of the battery pack. However, during the adhesive injection process, the adhesive can easily seep into the connector through the connection points between the wiring harness and the connector, causing connector failure and affecting the reliability of the battery pack. Utility Model Content

[0004] This application aims to provide a battery pack and electrical equipment to solve the problem that connectors fail due to glue seepage during the battery pack injection process, thereby affecting the reliability of the battery pack.

[0005] To solve the above-mentioned technical problems, this application is implemented as follows:

[0006] In a first aspect, this application discloses a battery pack, including: a housing, a battery module, and a sealing structure;

[0007] A connector is provided on the housing;

[0008] The battery module is disposed within the housing. The battery module includes an encapsulation structure, a battery assembly, and a wiring harness connected to the battery assembly. The battery assembly is disposed within the encapsulation structure, and at least a portion of the wiring harness extends outside the encapsulation structure and is connected to the connector.

[0009] The sealing structure is disposed between the housing and the encapsulation structure, and the sealing structure extends circumferentially along the connector and the wire harness so that the connection position of the connector and the wire harness is located within the enclosed space.

[0010] Optionally, the sealing structure includes: a sealing recess and a sealing protrusion;

[0011] The sealing recess is provided in one of the housing or the encapsulation structure;

[0012] The sealing protrusion is disposed in the other of the housing or the encapsulation structure, and the sealing protrusion corresponds to the sealing recess and is at least partially embedded in the sealing recess.

[0013] Optionally, the sealing structure further includes a first sealing element disposed between the sealing protrusion and the sealing recess.

[0014] Optionally, the encapsulation structure has a wire outlet on the inner side of the sealing structure, and the wire outlet is used to pass through the wire harness;

[0015] The battery pack also includes a second seal, which is disposed between the outlet and the wiring harness.

[0016] Optionally, the packaging structure includes: a packaging shell and a support;

[0017] The encapsulation shell is provided with an opening receiving cavity;

[0018] The battery assembly is fixedly connected to the bracket, and the bracket is disposed within the receiving cavity;

[0019] The battery pack also includes a third seal disposed between the opening and the bracket.

[0020] Optionally, the bracket has a protrusion at one end near the opening, and the protrusion and the encapsulation shell form an annular groove;

[0021] The third sealing element is embedded in the annular groove.

[0022] Optionally, the housing includes: a barrel body and two end caps, the two end caps being respectively disposed at both ends of the barrel body in the extending direction;

[0023] The battery pack also includes two fourth seals, one of which is disposed between the barrel and one of the end caps.

[0024] Optionally, the end cap is provided with a connecting portion at one end near the barrel body, and at least a portion of the connecting portion extends into the barrel body;

[0025] The fourth sealing element is fitted onto the connecting part and abuts against the inner wall of the barrel.

[0026] Optionally, a gap exists between the housing and the encapsulation structure;

[0027] The housing has an injection hole located away from the sealing structure, and the injection hole is used to inject adhesive into the gap to fill the gap.

[0028] Secondly, this application also discloses an electrical device, including the aforementioned battery pack.

[0029] In this embodiment, a sealing structure is provided between the housing and the encapsulation structure, and this sealing structure extends circumferentially along the connector and wiring harness. This allows the connection point between the connector and wiring harness to be located within the enclosed space formed by the sealing structure, the housing, and the encapsulation structure. Thus, during battery pack assembly, when adhesive is injected into areas outside the enclosed space, the sealing structure can, to some extent, block the path of adhesive to the wiring harness and connector, effectively reducing the risk of connector failure due to adhesive entering the connector's interior, thereby improving the reliability of the battery pack. Furthermore, during battery pack use, moisture can be prevented from entering the enclosed space from the outside or other locations within the housing, thus providing waterproofing for the wiring harness and connector, improving the battery pack's waterproofing effect, and further enhancing its reliability.

[0030] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0031] The above and / or additional aspects and advantages of this utility model will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:

[0032] Figure 1 This is a schematic diagram of the structure of a battery pack provided in an embodiment of this application;

[0033] Figure 2 This is an exploded view of a battery pack provided in an embodiment of this application;

[0034] Figure 3 This is one of the cross-sectional views of a battery pack provided in an embodiment of this application;

[0035] Figure 4 yes Figure 3 A magnified view of a section at point A in the middle;

[0036] Figure 5 yes Figure 3 A magnified view of a section at point B in the middle;

[0037] Figure 6 This is a second cross-sectional view of a battery pack provided in an embodiment of this application;

[0038] Figure 7 This is an exploded view of the bracket and battery assembly provided in the embodiments of this application;

[0039] Figure 8 This is a schematic diagram of the structure of the lower end cap provided in an embodiment of this application;

[0040] Figure 9 This is a schematic diagram of the structure of the upper cover provided in the embodiment of this application.

[0041] Figure label:

[0042] 100. Battery pack,

[0043] 1. Shell, 11. Barrel body, 12. End cap, 121. Lower end cap, 122. Upper end cap, 123. Mounting hole, 124. Connecting part, 125. Injection hole, 126. Sealing plate, 127. Handle

[0044] 2. Battery module, 21. Packaging structure, 211. Packaging shell, 2111. Receiving cavity, 212. Support, 2121. End plate, 21211. Cable outlet, 21212. Protrusion, 21213. Annular groove, 2122. Support plate, 21221. First mounting slot, 21222. Second mounting slot, 22. Battery assembly, 221. Cell, 222. Busbar, 223. Circuit board, 23. Wiring harness

[0045] 3. Sealing structure, 31. Sealing protrusion, 32. Sealing recess, 33. First sealing element,

[0046] 4. Connector

[0047] 5. Second seal,

[0048] 6. Third seal,

[0049] 7. Fourth seal,

[0050] X. First direction. Detailed Implementation

[0051] The embodiments of this utility model will now be described in detail. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model. All other embodiments obtained by those skilled in the art based on the embodiments in this application without inventive effort are within the scope of protection of this application.

[0052] The terms "first" and "second" in the specification and claims of this application may explicitly or implicitly include one or more of the features. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more. Furthermore, in the specification and claims, "and / or" indicates at least one of the connected objects, and the character " / " generally indicates that the preceding and following objects are in an "or" relationship.

[0053] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0054] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0055] This application provides a battery pack, which will be described in detail below with reference to the accompanying drawings.

[0056] Reference Figure 1 This document shows a schematic diagram of the structure of a battery pack according to an embodiment of this application. (Refer to...) Figure 2 An exploded view of a battery pack according to an embodiment of this application is shown, with reference to... Figure 3 This shows one of the cross-sectional views of a battery pack provided in an embodiment of this application, with reference to... Figures 4 to 5 They respectively showed Figure 3 Enlarged views of points A and B in the middle, refer to Figure 6 This shows a second cross-sectional view of a battery pack provided in an embodiment of this application, with reference to... Figure 7 An exploded view of the bracket and battery assembly provided in an embodiment of this application is shown, with reference to... Figures 8 to 9 The diagrams show the structural schematics of the lower end cover and the upper end cover provided in the embodiments of this application.

[0057] like Figures 1 to 3As shown, this application provides a battery pack 100, including: a housing 1, a battery module 2, and a sealing structure 3; a connector 4 is disposed on the housing 1; the battery module 2 is disposed inside the housing 1, and the battery module 2 includes an encapsulation structure 21, a battery assembly 22, and a wiring harness 23 connected to the battery assembly 22. The battery assembly 22 is disposed inside the encapsulation structure 21, and at least a portion of the wiring harness 23 extends outside the encapsulation structure 21 and is connected to the connector 4; the sealing structure 3 is disposed between the housing 1 and the encapsulation structure 21, and the sealing structure 3 extends circumferentially along the connector 4 and the wiring harness 23 so that the connection position of the connector 4 and the wiring harness 23 is located within a closed space.

[0058] In this embodiment, a sealing structure 3 is provided between the housing 1 and the encapsulation structure 21, and the sealing structure 3 extends circumferentially along the connector 4 and the wiring harness 23. This allows the connection point between the connector 4 and the wiring harness 23 to be located within the enclosed space formed by the sealing structure 3, the housing 1, and the encapsulation structure 21. Thus, during the assembly of the battery pack 100, when adhesive is injected into areas outside the enclosed space, the sealing structure 3 can, to a certain extent, block the path of adhesive to the wiring harness 23 and the connector 4, effectively reducing the risk of connector 4 failure due to adhesive entering the connector 4, and improving the reliability of the battery pack 100. Furthermore, during the use of the battery pack 100, moisture can be prevented from entering the enclosed space from the outside or other locations inside the housing 1, thereby providing waterproofing for the wiring harness 23 and the connector 4, improving the waterproofing effect of the battery pack 100, and further enhancing the reliability of the battery pack 100.

[0059] In a specific application, the housing 1 includes a barrel 11 and two end caps 12, which are located at both ends of the barrel 11 in the extending direction. The connector 4 is disposed on one of the end caps 12. The two end caps 12 include an upper end cap 122 and a lower end cap 121 (the upper end cap 122 refers to the end cap 12 located at the bottom during normal use of the battery pack 100, and the lower end cap 121 refers to the end cap 12 located at the top during normal use of the battery pack 100). Taking the connector 4 disposed on the lower end cap 121 as an example, the lower end cap 121 is provided with a mounting hole 123, and the connector 4 is fixedly connected to the side of the lower end cap 121 away from the barrel 11 by bolts and extends at least partially into the mounting hole 123. Generally, the finished connector 4 has a built-in waterproof structure (such as a sealing ring). When the connector 4 is installed on the lower end cover 121, the waterproof structure can fill the assembly gap between the connector 4 and the lower end cover 121, thereby achieving a reliable seal between the connector 4 and the lower end cover 121. This prevents external moisture from entering the battery pack 100 from the connection between the connector 4 and the lower end cover 121, thus improving the waterproof performance of the battery pack 100. Furthermore, the upper end cover 122 is also provided with a handle 127 for transferring the battery pack 100.

[0060] In some alternative embodiments of this application, such as Figure 4 As shown, the sealing structure 3 includes a sealing recess 32 and a sealing protrusion 31; the sealing recess 32 is disposed in one of the housing 1 or the encapsulation structure 21; the sealing protrusion 31 is disposed in the other of the housing 1 or the encapsulation structure 21, and the sealing protrusion 31 corresponds to the sealing recess 32 in position and is at least partially embedded in the sealing recess 32. It can be understood that both the sealing protrusion 31 and the sealing recess 32 are annular structures extending circumferentially along the connector 4 and the wire harness 23.

[0061] In this embodiment, the sealing recess 32 and the sealing protrusion 31 are provided. Through the interlocking connection of the sealing recess 32 and the sealing protrusion 31, the path of adhesive flowing to the wire harness 23 and the connector 4 can be blocked to a certain extent, effectively reducing the risk of connector 4 failure due to adhesive entering the interior of connector 4, which is beneficial to further improving the reliability of battery pack 100. On the other hand, it can achieve rapid and accurate alignment between housing 1 and encapsulation structure 21, thereby improving the assembly efficiency and assembly accuracy of battery pack 100.

[0062] Furthermore, such as Figure 2 As shown, the encapsulation structure 21 includes a support 212 and an encapsulation shell 211. The encapsulation shell 211 has a receiving cavity 2111 with an opening near the lower end cover 121. The support 212 is disposed within the receiving cavity 2111 and is used to fix the battery assembly 22. In one embodiment, a sealing protrusion 31 is disposed on the lower end cover 121. Specifically, at least a portion of the lower end cover 121 located around the mounting hole 123 protrudes towards the support 212 to form an annular sealing protrusion 31. A sealing recess 32 is disposed on the support 212. Specifically, at least a portion of the support 212 is recessed away from the lower end cover 121 to form an annular sealing recess 32. By having at least a portion of the sealing protrusion 31 embedded in the sealing recess 32, a seal between the shell 1 and the support 212 can be achieved.

[0063] It should be noted that the drawings of the present application only show the situation where the sealing protrusion 31 is disposed on the housing 1 and the sealing recess 32 is disposed on the bracket 212 of the packaging structure 21. In practical applications, those skilled in the art can also arrange the sealing recess 32 on the housing 1, and correspondingly arrange the sealing protrusion 31 on the bracket 212 of the packaging structure 21, which is not limited herein, and those skilled in the art can make adjustments according to actual needs. In addition, the embodiments of the present application do not limit the shape of the orthographic projection of the sealing protrusion 31 and the sealing groove along the extension direction of the housing 1. Taking the sealing protrusion 31 as an example, the shape of the orthographic projection of the sealing protrusion 31 along the extension direction of the housing 1 includes, but is not limited to, rectangle, circle, triangle, polygon or irregular shape, such as the "convex" shape in the drawings, and those skilled in the art can make adjustments according to actual needs. It can be understood that the shapes of the orthographic projections of the sealing recess 32 and the sealing protrusion 31 along the extension direction of the housing 1 should be consistent, so as to enable better adaptation between the two. The embodiments of the present application will not repeat the description of the shape of the orthographic projection of the sealing protrusion 31 along the extension direction of the housing 1.

[0064] In some optional embodiments of the present application, the sealing structure 3 further comprises: a first sealing member 33, which is disposed between the sealing protrusion 31 and the sealing recess 32. Wherein, the first sealing member 33 may be a sealing ring.

[0065] In the embodiments of the present application, by arranging the first sealing member 33 between the sealing protrusion 31 and the sealing recess 32, on one hand, the sealing effect between the housing 1 and the packaging structure 21 can be improved, which not only reduces the possibility of glue entering the closed space during the glue injection process, but also reduces the possibility of moisture entering the closed space during the use of the battery pack 100, so that the connector 4 and the wiring harness 23 can always maintain a reliable connection state. On the other hand, the first sealing member 33 is usually made of flexible material, which can absorb the vibration energy generated during the operation of the battery pack 100, and effectively avoid the problem of damage to the sealing protrusion 31 and the sealing recess 32 caused by vibration.

[0066] In some optional embodiments of the present application, the packaging structure 21 is provided with a wire outlet 21211 on the inner side of the sealing structure 3, and the wire outlet 21211 is used for passing through the wiring harness 23; the battery pack 100 further comprises a second sealing member 5, which is disposed between the wire outlet 21211 and the wiring harness 23. Specifically, the wire outlet 21211 is disposed on the bracket 212 of the packaging structure 21.

[0067] Further, the packaging structure 21 comprises: a packaging shell 211 and a bracket 212; the packaging shell 211 is provided with a containing cavity 2111 having an opening; the battery assembly 22 is fixedly connected to the bracket 212, and the bracket 212 is disposed in the containing cavity 2111; the battery pack 100 further comprises a third sealing member 6, which is disposed between the opening and the bracket 212.

[0068] In this embodiment, by providing a second sealing element 5 between the outlet 21211 and the wiring harness 23, a seal can be achieved between the outlet 21211 and the wiring harness 23, that is, a seal can be achieved between the bracket 212 and the wiring harness 23. By providing a third sealing element 6 between the opening of the encapsulation shell 211 and the bracket 212, a seal can be achieved between the bracket 212 and the encapsulation shell 211. In summary, by providing the second sealing element 5 and the third sealing element 6, the encapsulation structure 21 can be sealed, effectively preventing external moisture from entering the encapsulation structure 21. This provides waterproofing for the battery assembly 22 located within the encapsulation structure 21, thereby improving the waterproof performance of the battery pack 100 and further enhancing the reliability of the battery pack 100.

[0069] It should be noted that the second seal 5 can be a sealant. Specifically, sealant is applied to the gap between the cable outlet 21211 of the bracket 212 and the wire harness 23. After the sealant cures, it reliably seals the cable outlet 21211 of the bracket 212 and the wire harness 23. The third seal 6 can be a sealant or a sealing ring. Specifically, sealant is applied to the gap between the opening of the encapsulation shell 211 and the bracket 212. After the sealant cures, it reliably seals the opening of the encapsulation shell 211 and the bracket 212; or a sealing ring is embedded in the gap between the opening of the encapsulation shell 211 and the bracket 212 to achieve a seal between the opening of the encapsulation shell 211 and the bracket 212. In addition, the encapsulation shell 211 includes, but is not limited to, blow-molded shells, plastic shells, heat-shrink tubing, or other shells. Among them, blow-molded shells and plastic shells have better texture, better wear resistance, and are not easily scratched. Heat-shrink tubing can reduce material costs. Those skilled in the art can choose according to actual needs. The bracket 212 can be a one-piece injection molded plastic bracket 212. The plastic bracket 212 has a good texture and can provide good support for the battery assembly 22.

[0070] In some alternative embodiments of this application, such as Figure 6 As shown, a protrusion 21212 is provided at one end of the bracket 212 near the opening, and the protrusion 21212 and the encapsulation shell 211 surround to form an annular groove 21213; the third seal 6 is embedded in the annular groove 21213. Specifically, the protrusion 21212 may be formed by at least a portion of the lower end cover 121 protruding toward the side away from the center of the bracket 212.

[0071] In this embodiment, since a protrusion 21212 is provided, and the protrusion 21212 and the encapsulation shell 211 surround to form an annular groove 21213, the third sealing member 6 can be embedded in the annular groove 21213 to achieve a seal between the opening of the encapsulation shell 211 and the support 212. This effectively prevents external moisture from entering the encapsulation structure 21 from the gap between the opening of the encapsulation shell 211 and the support 212, thereby waterproofing the battery assembly 22 inside the encapsulation structure 21. This can improve the waterproof performance of the battery pack 100 and further improve the reliability of the battery pack 100.

[0072] In specific applications, such as Figure 7 As shown, the extension direction of the housing 1 is the first direction X. The bracket 212 includes two end plates 2121 and a support plate 2122. The two end plates 2121 are spaced apart along the first direction X. The support plate 2122 extends along the first direction X and connects to the two end plates 2121. The support plate 2122 is provided with a plurality of first mounting grooves 21221. At least a portion of the support plate 2122 and the two end plates 2121 enclose a second mounting groove 21222. The outlet 21211 is opened in one of the end plates 2121 (as shown in the lower end plate 2121). The battery assembly 22 includes a plurality of battery cells 221. By installing one battery cell 221 in one of the first mounting grooves 21221 and applying adhesive between the first mounting groove 21221 and the battery cell 221 bracket 212, the battery cell 221 and the bracket 212 can be reliably fixed. The battery assembly 22 also includes a busbar 222 and a circuit board 223. The busbar 222 is electrically connected to the circuit board 223 and multiple battery cells 221. The circuit board 223 is electrically connected to the wiring harness 23, thereby enabling the collection and output of electrical energy. The circuit board 223 is disposed within the second mounting slot 21222 and is fixedly connected to the end plate 2121 or the support plate 2122. The wiring harness 23 connected to the circuit board 223 extends to the outside of the bracket 212 through the outlet 21211. It should be noted that the circuit board 223 can be a battery management system (BMS), a module used to manage the operation of the battery cells 221. The circuit board 223 typically integrates multiple electronic components to support corresponding functions.

[0073] In some alternative embodiments of this application, such as Figure 2 As shown, the housing 1 includes a barrel 11 and two end caps 12, which are respectively disposed at both ends of the barrel 11 in the extending direction; the battery pack 100 also includes two fourth seals 7, one of which is disposed between the barrel 11 and one end cap 12.

[0074] In this embodiment of the application, by providing a fourth sealing element 7 between the barrel 11 and the end cap 12, the barrel 11 and the end cap 12 can be sealed, effectively preventing external moisture from entering the battery pack 100 from the connection between the barrel 11 and the end cap 12, thereby further improving the waterproof effect of the battery pack 100.

[0075] In practical applications, the end cap 12 and the barrel 11 can be connected by bolts. Specifically, multiple bolts are provided, and the multiple bolts are distributed circumferentially along the end cap 12 and are all located on the outside of the fourth sealing element 7. This can prevent water from entering the battery pack 100 from the bolt connection, which is beneficial to further improve the waterproof effect of the battery pack 100.

[0076] In some alternative embodiments of this application, such as Figure 4 , Figure 5 , Figure 8 as well as Figure 9 As shown, the end cap 12 near the barrel 11 has a connecting portion 124, at least a portion of which extends into the barrel 11; the fourth sealing member 7 is fitted onto the connecting portion 124 and abuts against the inner wall of the barrel 11. Thus, during the assembly of the end cap 12 and the barrel 11, by fitting the fourth sealing member 7 onto the connecting portion 124 and then inserting at least a portion of the connecting portion 124 into the barrel 11, the fourth sealing member 7 is deformed by compression and fills the gap between the connecting portion 124 and the inner wall of the barrel 11, thereby achieving a sealed connection between the end cap 12 and the barrel 11. This effectively prevents moisture from entering the battery pack 100 through the gap between the connecting portion 124 and the inner wall of the barrel 11, thereby further improving the waterproof effect of the battery pack 100.

[0077] It should be noted that the connecting portion 124 and the fourth sealing element 7 in this embodiment can be either a separate molding structure or a one-piece molding structure, which is not limited here, and those skilled in the art can adjust them according to actual needs. In one embodiment, the connecting portion 124 and the fourth sealing element 7 can be a separate molding structure, wherein the fourth sealing element 7 includes a body and a plurality of sealing ribs, the body is sleeved on the connecting portion 124, the sealing ribs extend circumferentially along the body and the plurality of sealing ribs are spaced apart in the first direction X, thereby forming a multi-seal structure, further improving the sealing effect of the end cap 12 and the barrel 11. In another embodiment, the connecting portion 124 and the fourth sealing element 7 can be a one-piece molding structure, wherein the fourth sealing element 7 includes a plurality of sealing ribs spaced apart along the first direction X, and the plurality of sealing ribs are formed on the surface of the connecting portion 124 by injection molding. In this way, not only can assembly steps be saved, which is beneficial to improving the assembly efficiency of the battery pack 100; but also the sealing performance can be improved, which is beneficial to improving the waterproof effect of the battery pack 100.

[0078] In some alternative embodiments of this application, such as Figure 4 As shown, there is a gap between the housing 1 and the encapsulation structure 21; the housing 1 has a glue injection hole 125 at a position avoiding the sealing structure 3, which is used to inject glue into the gap to fill it. Further, the glue injection hole 125 can be provided on the upper end cap 122 and / or the lower end cap 121 of the housing 1. After glue injection, a sealing piece 126 can be provided at the glue injection hole 125 to seal it. The sealing piece 126 can be a PC sheet (i.e., polycarbonate sheet).

[0079] In this embodiment, by providing an injection hole 125, after the housing 1 and the encapsulation structure 21 are assembled, adhesive can be injected into the gap between the housing 1 and the encapsulation structure 21 through the injection hole 125 to fill the gap. The sealant has good adhesion to the housing 1 or the encapsulation structure 21, effectively preventing moisture from entering the gap between the housing 1 and the battery module 2, thereby further improving the waterproof effect of the battery pack 100 and enhancing its reliability. Furthermore, since the injection hole 125 avoids the location of the sealing structure 3, the adhesive is blocked outside the sealing structure 3 during the injection process, effectively reducing the risk of connector 4 failure and further improving the reliability of the battery pack 100.

[0080] Based on the assembly steps of the battery pack 100, the second sealing member 5 and the third sealing member 6 in this embodiment can serve as the first-level waterproof structure of the battery pack 100, the fourth sealing member 7 can serve as the second-level waterproof structure of the battery pack 100, the sealing structure 3 can serve as the third-level waterproof structure of the battery pack 100, and injecting glue into the gap between the shell 1 and the encapsulation structure 21 through the glue injection hole 125 can serve as the fourth-level waterproof structure of the battery pack 100. In this way, multi-level waterproofing of the battery pack 100 can be achieved, with the four-level waterproof structure progressively advancing. Through the sealing cooperation between each level of waterproof structure and other components (such as the bracket 212, encapsulation shell 211, barrel 11, end cap 12, etc.), on the one hand, the waterproof effect of the battery pack 100 can be improved, reducing the risk of waterproof failure of the battery pack 100 during drops and vibrations, thereby better protecting the battery assembly 22 and improving the reliability of the battery pack 100. On the other hand, it can make the battery pack 100 structure more compact and have a higher degree of integration, which is beneficial to improving the overall integrity of the battery pack 100.

[0081] In summary, the battery pack provided in this application embodiment has at least the following advantages:

[0082] In this embodiment, a sealing structure is provided between the housing and the encapsulation structure, and this sealing structure extends circumferentially along the connector and wiring harness. This allows the connection point between the connector and wiring harness to be located within the enclosed space formed by the sealing structure, the housing, and the encapsulation structure. Thus, during battery pack assembly, when adhesive is injected into areas outside the enclosed space, the sealing structure can, to some extent, block the path of adhesive to the wiring harness and connector, effectively reducing the risk of connector failure due to adhesive entering the connector's interior, thereby improving the reliability of the battery pack. Furthermore, during battery pack use, moisture can be prevented from entering the enclosed space from the outside or other locations within the housing, thus providing waterproofing for the wiring harness and connector, improving the battery pack's waterproofing effect, and further enhancing its reliability.

[0083] This application also provides an electrical device including a battery pack 100 from any of the above embodiments. By providing the sealing structure 3, not only can the failure risk of the connector 4 be reduced, but the wiring harness 23 and the connector 4 can also be waterproofed, thereby improving the reliability of the battery pack 100 and enhancing the operational reliability of the electrical device.

[0084] It should be noted that in this embodiment, the structure of the battery pack 100 is the same as that of the battery pack 100 in any of the above embodiments, and its beneficial effects are similar, so it will not be described in detail here. The electrical equipment in this embodiment includes, but is not limited to, vehicles (such as electric cars, electric bicycles, electric scooters, etc.), ferries, aircraft, energy storage devices, or other equipment, and is not limited thereto. Those skilled in the art can make adjustments according to actual needs.

[0085] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0086] Although embodiments of the present invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A battery pack, characterized by, include: Casing, battery module, and sealing structure; A connector is provided on the housing; The battery module is disposed within the housing. The battery module includes an encapsulation structure, a battery assembly, and a wiring harness connected to the battery assembly. The battery assembly is disposed within the encapsulation structure, and at least a portion of the wiring harness extends outside the encapsulation structure and is connected to the connector. The sealing structure is disposed between the housing and the encapsulation structure, and the sealing structure extends circumferentially along the connector and the wire harness so that the connection position of the connector and the wire harness is located within the enclosed space.

2. The battery pack of claim 1, wherein, The sealing structure includes: a sealing recess and a sealing protrusion; The sealing recess is provided in one of the housing or the encapsulation structure; The sealing protrusion is disposed in the other of the housing or the encapsulation structure, and the sealing protrusion corresponds to the sealing recess and is at least partially embedded in the sealing recess.

3. The battery pack of claim 2, wherein, The sealing structure further includes a first sealing element, which is disposed between the sealing protrusion and the sealing recess.

4. The battery pack of any one of claims 1-3, wherein, The encapsulation structure has a wire outlet on the inner side of the sealing structure, and the wire outlet is used to pass through the wire harness. The battery pack also includes a second seal, which is disposed between the outlet and the wiring harness.

5. The battery pack of any one of claims 1-3, wherein, The packaging structure includes: a packaging shell and a support; The encapsulation shell is provided with an opening receiving cavity; The battery assembly is fixedly connected to the bracket, and the bracket is disposed within the receiving cavity; The battery pack also includes a third seal disposed between the opening and the bracket.

6. The battery pack of claim 5, wherein, The bracket has a protrusion at one end near the opening, and the protrusion and the encapsulation shell form an annular groove. The third sealing element is embedded in the annular groove.

7. The battery pack of any one of claims 1-3, wherein, The shell includes: a barrel body and two end caps, the two end caps being respectively disposed at both ends of the barrel body in the extending direction; The battery pack also includes two fourth seals, one of which is disposed between the barrel and one of the end caps.

8. The battery pack of claim 7, wherein, The end cap is provided with a connecting portion at one end near the barrel body, and at least a portion of the connecting portion extends into the barrel body; The fourth sealing element is fitted onto the connecting part and abuts against the inner wall of the barrel.

9. The battery pack of any one of claims 1-3, wherein, There is a gap between the housing and the encapsulation structure; The housing has an injection hole located away from the sealing structure, and the injection hole is used to inject adhesive into the gap to fill the gap.

10. An electric device, characterized by Includes the battery pack as described in any one of claims 1-9.

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