Battery pack

Abstract

The utility model discloses a battery pack, and belongs to the technical field of battery packs. Comprising a battery module and a sealing assembly, the sealing assembly comprises a sealing shell and sealant, the battery module comprises a wire harness end, the sealing shell wraps the periphery of the battery module, a wire harness of the battery module extends out of the sealing shell from the wire harness end, the sealant is arranged on the periphery of the wire harness, and the sealant and the sealing shell are bonded in a sealing mode. In the embodiment of the invention, the sealant and the sealing shell are bonded, so that compared with a traditional sealing mode, the bonding property and the sealing effect of the sealant are more excellent, meanwhile, the failure risk of the battery pack is reduced, the battery pack has higher safety and stability, and the reliability of the battery pack is improved.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of battery packs, and particularly relates to a battery pack. BACKGROUND

[0002] In the development of the lithium battery industry, the traditional waterproof foam sealed battery pack has a high production failure rate. The material, back glue and other characteristics of the waterproof foam determine that the adhesion strength of the waterproof foam to the heat shrink sleeve and the bracket cannot always meet the process and product requirements, and the adhesion effect is greatly reduced after long-term aging. The sealing and waterproof effect is greatly reduced, which has great safety hazards. CONTENT OF THE UTILITY MODEL

[0003] The application embodiment aims to provide a battery pack, which can solve the problem of reduced waterproof effect caused by long-term use of the internal structure of the battery pack in the prior art.

[0004] In order to solve the above technical problems, the application is implemented as follows:

[0005] In the first aspect, the application embodiment provides a battery pack, which comprises a battery module and a sealing assembly. The sealing assembly comprises a sealing shell and sealing glue. The battery module comprises a wire harness end. The sealing shell covers the outer periphery of the battery module. The wire harness of the battery module extends out of the sealing shell from the wire harness end. The sealing glue is arranged on the outer periphery of the wire harness, and the sealing glue and the sealing shell are sealingly bonded.

[0006] In the application embodiment, the sealing shell is arranged to protect the battery module placed in the sealing shell. The sealing shell and the sealing glue cooperate to seal the battery module in the sealing shell. Specifically, the battery module comprises a wire harness end and a non-wire harness end. In actual application, the wire harness of the battery module extends out of the wire harness end and connects with the sealing shell and other components. Further, the sealing glue is arranged on the outer periphery of the wire harness, and the sealing glue and the sealing shell are sealingly bonded at the wire harness end. In the application embodiment, the sealing glue and the sealing shell are bonded. Compared with the traditional sealing method, the adhesion and sealing effect of the sealing glue are more superior. At the same time, the risk of failure of the battery pack is reduced, the safety and stability of the battery pack are improved, and the reliability of the battery pack is improved.

[0007] Further, compared with the traditional sealing method, the application embodiment cancels the traditional waterproof foam, and also has the beneficial effect of reducing cost.

[0008] Optionally, in the application embodiment, the battery module comprises a non-wire harness end. The non-wire harness end and the wire harness end are oppositely arranged along a first direction. The sealing shell is completely sealed at the non-wire harness end. The sealing shell is partially sealed at the wire harness end. The sealing glue is arranged at the wire harness end.

[0009] Optionally, in the embodiment of the present application, the sealing shell is a tubular structure having a first joint and a second joint oppositely arranged along the first direction, the sealing shell is sleeved on the battery module, the first joint is arranged at the non-harness end, the second joint is arranged at the harness end, and the sealing glue is bonded to the second joint.

[0010] Optionally, in the embodiment of the present application, the sealing shell comprises a first sealing part and a second sealing part, the first sealing part and the second sealing part are oppositely arranged along the first direction, the first sealing part is sleeved on the non-harness end, the second sealing part is sleeved on the harness end, the first sealing part and the second sealing part are sealingly connected, and the sealing glue is bonded to the second sealing part.

[0011] Optionally, in the embodiment of the present application, the second sealing part is provided with a harness hole, the harness extends out of the second sealing part from the harness hole, and the sealing glue is bonded to the harness and seals the harness hole.

[0012] Optionally, in the embodiment of the present application, the sealing shell comprises a third sealing part and a fourth sealing part, the third sealing part and the fourth sealing part are oppositely arranged along a second direction, the third sealing part is sleeved on part of the harness end and part of the non-harness end, the fourth sealing part is sleeved on part of the harness end and part of the non-harness end, and the third sealing part and the fourth sealing part are sealingly connected; wherein the second direction is perpendicular to the first direction.

[0013] Optionally, in the embodiment of the present application, the third sealing part has a first groove, the fourth sealing part has a second groove, the first groove and the second groove enclose a harness hole, the harness extends out of the third sealing part and the fourth sealing part from the harness hole, and the sealing glue is bonded to the harness and seals the harness hole.

[0014] Optionally, in the embodiment of the present application, the sealing assembly further comprises a barley paper, the battery module has an outer circumferential surface between the harness end and the non-harness end, the barley paper is wrapped on the outer circumferential surface, and the barley paper is clamped between the sealing shell and the battery module.

[0015] Optionally, in the embodiment of the present application, the battery module comprises a cell group, a first support and a second support, the first support and the second support are oppositely arranged, the cell group is arranged between the first support and the second support, and the barley paper is wrapped on the periphery of the first support and the second support.

[0016] Optionally, in the embodiment of the present application, the material of the sealing shell is a heat-shrinkable material. BRIEF DESCRIPTION OF DRAWINGS

[0017] Fig. 1 is a schematic diagram of an explosion structure of a battery pack in the embodiment of the present application;

[0018] Fig. 2 is a schematic diagram of a structure of a battery pack in the embodiment of the present application;

[0019] Fig. 3 is a schematic diagram of a structure of a wire harness end in the embodiment of the present application;

[0020] Fig. 4 is a schematic diagram of a structure of a non-wire harness end in the embodiment of the present application.

[0021] REFERENCE SIGNS:

[0022] 10, battery module; 11, wire harness end; 12, non-wire harness end; 13, cell group; 14, first support; 15, second support; 16, barley paper; 20, sealing assembly; 21, sealing shell; 22, sealing glue; 211, first joint; 212, second joint. DETAILED DESCRIPTION

[0023] 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 some of the embodiments of the present application, but not all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the scope of protection of the present application.

[0024] The terms “first”, “second”, and the like in the specification and claims of the present application are used to distinguish similar objects, and are not used to describe a specific order or sequence. It should be understood that the data used in this way can be interchanged under appropriate circumstances, so that the embodiments of the present application can be implemented in an order other than those illustrated or described herein, and the objects distinguished by “first”, “second”, etc. are usually a category and do not limit the number of objects, for example, the first object can be one or more. In addition, “and / or” in the specification and claims indicates at least one of the connected objects, and the character “ / ” generally indicates that the front and rear associated objects are in an “or” relationship.

[0025] The battery pack provided by the embodiments of the present application will be described in detail below in combination with the drawings and specific embodiments and their application scenarios.

[0026] Reference is made to Figs. 1 to 4The embodiments of the present application provide a battery pack, comprising a battery module 10 and a sealing assembly 20, the sealing assembly 20 comprises a sealing shell 21 and a sealing glue 22, the battery module 10 comprises a wire harness end 11, the sealing shell 21 is wrapped around the outer periphery of the battery module 10, the wire harness of the battery module 10 extends out of the sealing shell 21 from the wire harness end 11, the sealing glue 22 is arranged on the outer periphery of the wire harness, and the sealing glue 22 and the sealing shell 21 are sealingly bonded.

[0027] In the embodiments of the present application, the sealing shell 21 is arranged to protect the battery module 10 placed in the sealing shell 21, wherein the sealing shell 21 and the sealing glue 22 cooperate to seal the battery module 10 in the sealing shell 21. Specifically, the battery module 10 comprises a wire harness end 11 and a non-wire harness end 12. In actual application, the wire harness of the battery module 10 extends out of the sealing shell 21 and other components from the wire harness end 11. Further, the sealing glue 22 is arranged on the outer periphery of the wire harness, and the sealing glue 22 and the sealing shell 21 are sealingly bonded at the wire harness end 11. In the embodiments of the present application, the sealing glue 22 and the sealing shell 21 are bonded, which is superior to the bonding property and sealing effect of the sealing glue 22 compared with the conventional sealing method, and reduces the risk of failure of the battery pack, so that the battery pack is more secure and stable, and the reliability of the battery pack is improved.

[0028] Further, compared with the conventional sealing method, the embodiments of the present application cancel the conventional waterproof foam, and also have the beneficial effect of reducing cost.

[0029] Optionally, in the embodiments of the present application, the battery module 10 comprises a non-wire harness end 12, the non-wire harness end 12 and the wire harness end 11 are oppositely arranged along a first direction, the sealing shell 21 is completely sealed at the non-wire harness end 12, the sealing shell 21 is partially sealed at the non-wire harness end 12, and the sealing glue 22 is arranged on the wire harness end 11.

[0030] In the embodiments of the present application, the wire harness of the battery module 10 extends out of the sealing shell 21 from the wire harness end 11, the sealing shell 21 is completely sealed at the position of the non-wire harness end 12 and is partially sealed at the position of the wire harness end 11, and the part of the wire harness extending out is not sealed, so as to realize the wire harness extending out of the sealing shell 21 from the wire harness end 11. Further, the sealing glue 22 is arranged on the wire harness end 11, and the sealing glue 22 is connected to the sealing shell 21. It can be understood that the sealing glue 22 seals the part of the wire harness end 11 which is not completely sealed, thereby realizing the sealing of the battery module 10.

[0031] Optionally, in the embodiment of the present application, the sealing shell 21 is a tubular structure having a first joint 211 and a second joint 212 oppositely arranged along a first direction, the sealing shell 21 is sleeved on the battery module 10, the first joint 211 is arranged at the non-harness end 12, the second joint 212 is arranged at the harness end 11, and the sealing glue 22 is bonded to the second joint 212.

[0032] In the embodiment of the present application, the sealing shell 21 of the tubular structure can be sleeved on the battery module 10, the tubular structure has the first joint 211 and the second joint 212, the first joint 211 is arranged at the non-harness end 12, it can be understood that the arrangement of the first joint 211 realizes the complete sealing of the sealing shell 21 at the non-harness end 12, the arrangement of the second joint 212 realizes the partial sealing of the sealing shell 21 at the harness end 11, further, the arrangement of the above-mentioned partial sealing is used to provide an extension space for the harness. Still further, the sealing glue 22 is bonded to the second joint 212, and the arrangement of the sealing glue 22 is used to cooperate with the sealing shell 21 to realize the sealing of the battery module 10 and also realize the extension of the harness from the sealing shell.

[0033] In the embodiment of the present application, by arranging the first joint 211 and the second joint 212 at the two ends of the sealing shell 21 and bonding the sealing glue 22 at the harness end 11, the sealing mode of the battery module 10 is simplified, and the beneficial effects of simple structure and easy assembly are achieved.

[0034] Optionally, in the embodiment of the present application, the sealing shell 21 comprises a first sealing part and a second sealing part, the first sealing part and the second sealing part are oppositely arranged along a first direction, the first sealing part is sleeved on the non-harness end 12, the second sealing part is sleeved on the harness end 11, the first sealing part and the second sealing part are sealingly connected, and the sealing glue 22 is bonded to the second sealing part.

[0035] In the embodiment of the present application, the first sealing part and the second sealing part cooperate and are sealingly connected to realize the sealing of the battery module 10, specifically, the first sealing part is sleeved on the non-harness end 12 along a first direction, the second sealing part is sleeved on the harness end 11 along a second direction, and the first sealing part and the second sealing part are sealingly connected to realize the sealing of the battery module 10. Further, the first sealing part and the second sealing part are bonded and connected to realize the sealing of the battery module 10, and the sealing glue 22 is bonded to the second sealing part to realize the sealing of the position where the harness extends.

[0036] In the embodiment of the present application, compared with the traditional sealing mode of pasting waterproof foam, it is difficult to control the paste flatness (to ensure that no wrinkles appear in the production process), the sealing shell 21 in the present application has the beneficial effects of easy sealing and simple implementation mode.

[0037] Optionally, in the embodiment of the present application, the second sealing part is provided with a wire harness hole, and the wire harness extends out of the second sealing part from the wire harness hole, and the sealing glue 22 is bonded to the wire harness and seals the wire harness hole.

[0038] In the embodiment of the present application, the wire harness hole is provided to provide an extension space for the wire harness of the battery module 10. Specifically, the wire harness hole is provided corresponding to the wire harness end 11, and the wire harness extends out of the second sealing part from the wire harness hole to realize subsequent connection with other components. The sealing glue 22 is bonded to the wire harness and seals the wire harness hole. In the embodiment of the present application, the sealing glue 22 and the second sealing part are closely bonded, and the above bonding effect is better than that of the conventional sealing method. After long-term use and possible aging, the bonding force can also be maintained enough to ensure the required waterproof level and improve the reliability of the battery pack.

[0039] Optionally, in the embodiment of the present application, the sealing shell 21 includes a third sealing part and a fourth sealing part, the third sealing part and the fourth sealing part are oppositely arranged along a second direction, the third sealing part is sleeved on part of the wire harness end 11 and part of the non-wire harness end 12, the fourth sealing part is sleeved on part of the wire harness end 11 and part of the non-wire harness end 12, and the third sealing part and the fourth sealing part are sealingly connected; wherein the second direction is perpendicular to the first direction.

[0040] In the embodiment of the present application, the third sealing part and the fourth sealing part cooperate and are sealingly connected to realize sealing of the battery module 10. Specifically, the third sealing part and the fourth sealing part are both sleeved on part of the non-wire harness end 12 and part of the wire harness end 11, and the third sealing part and the fourth sealing part are sealingly connected to realize sealing of the battery module 10. Further, the third sealing part and the fourth sealing part are bonded and connected to realize sealing of the battery module 10, and the sealing glue 22 is bonded to the third sealing part and the fourth sealing part to realize sealing at the position of the extending wire harness.

[0041] In the embodiment of the present application, compared with the conventional sealing method of pasting waterproof foam, it is difficult to control the required paste flatness (to ensure that no wrinkles appear during the production process). The sealing shell 21 in the present application has the beneficial effects of easy sealing and simple implementation.

[0042] Optionally, in the embodiment of the present application, the third sealing part has a first groove, the fourth sealing part has a second groove, the first groove and the second groove enclose to form a wire harness hole, and the wire harness extends out of the third sealing part and the fourth sealing part from the wire harness hole, and the sealing glue 22 is bonded to the wire harness and seals the wire harness hole.

[0043] In the embodiment of the present application, the wire harness hole is arranged to provide an extension space for the wire harness of the battery module 10. Specifically, the first groove and the second groove enclose the wire harness hole, and the wire harness hole is arranged at the wire harness end 11. The wire harness extends from the wire harness hole to the first sealing part to realize the connection between the wire harness and other components. The sealant 22 is bonded to the wire harness and seals the wire harness hole. In the embodiment of the present application, the sealant 22 is tightly bonded to the third sealing part and the fourth sealing part. Compared with the conventional sealing method, the above bonding effect is better. After long-term use and possible aging, the bonding force can still be sufficient to ensure the required waterproof level and improve the reliability of the battery pack.

[0044] Optionally, in the embodiment of the present application, the sealing assembly 20 further comprises the barley paper 16. The battery module 10 has an outer circumferential surface between the wire harness end 11 and the non-wire harness end 12. The barley paper 16 is wrapped around the outer circumferential surface, and the barley paper 16 is clamped between the sealing shell 21 and the battery module 10.

[0045] In the embodiment of the present application, the barley paper 16 is arranged to play an insulating role. The barley paper 16 is arranged between the sealing shell 21 and the battery module 10 to realize the insulation between the battery module 10 and the sealing assembly 20. Specifically, the barley paper 16 is wrapped around the outer circumferential surface of the battery module 10 to protect the battery module 10.

[0046] Optionally, in the embodiment of the present application, the battery module 10 comprises the cell group 13, the first support 14 and the second support 15. The first support 14 and the second support 15 are arranged oppositely. The cell group 13 is arranged between the first support 14 and the second support 15. The barley paper 16 is wrapped around the periphery of the first support 14 and the second support 15.

[0047] In the embodiment of the present application, the first support 14 and the second support 15 are arranged to provide a certain supporting force for the cell group 13. At the same time, the first support 14 and the second support 15 are also arranged to limit the cell group 13 to prevent the battery pack from failing due to the displacement of the cells in the cell group 13 during use. The barley paper 16 is wrapped around the periphery of the first support 14 and the second support 15 to effectively isolate the cell group 13 and the sealing shell 21 and realize the insulation of the cell group 13.

[0048] Optionally, in the embodiment of the present application, the material of the sealing shell 21 is a heat-shrinkable material.

[0049] In the embodiments of the present application, the sealing shell 21 of the heat shrinkable material can be closed and packaged by heat shrinkage, which is simple and convenient in process operation, and the bonding effect between the sealing shell 21 of the heat shrinkable material and the sealing glue 22 is better, which can also maintain sufficient bonding effect after long-term use and aging, further, the traditional sealing method of setting waterproof foam is cancelled, which has the beneficial effects of improving the sealing effect, simplifying the packaging and reducing the cost. It should be noted that in this paper, the terms "include", "contain" or any other variants thereof are intended to cover non-exclusive inclusion, so that the process, method, article or device including a series of elements not only includes those elements, but also includes other elements not explicitly listed or inherent to such process, method, article or device. Without more limitations, the element defined by the statement "including a" does not exclude the presence of other identical elements in the process, method, article or device including the element. In addition, it should be pointed out that the scope of the method and device in the embodiments of the present application is not limited to performing functions in the order shown or discussed, but can also include performing functions in a substantially simultaneous manner or in the opposite order according to the functions involved, for example, the described method can be performed in an order different from that described, and various steps can also be added, omitted or combined. In addition, the features described with reference to certain examples can be combined in other examples.

[0050] The embodiments of the present application are described above in combination with the drawings, but the present application is not limited to the above specific embodiments, and the above specific embodiments are only illustrative and not limiting, and those skilled in the art can make many forms under the inspiration of the present application without departing from the scope of the present application and the scope protected by the claims.

Claims

1. A battery pack, characterized by, The battery module (10) includes a harness end (11), the sealing shell (21) is wrapped around the outer periphery of the battery module (10), the harness of the battery module (10) extends out of the sealing shell (21) from the harness end (11), and the sealing glue (22) is arranged on the outer periphery of the harness and is sealingly bonded with the sealing shell (21).

2. The battery pack of claim 1, wherein, The battery module (10) includes a non-harness end (12) opposite the harness end (11) in a first direction, the sealing shell (21) is completely sealed at the non-harness end (12), the sealing shell (21) is partially sealed at the harness end (11), and the sealing glue (22) is arranged at the harness end (11).

3. The battery pack of claim 2, wherein, The sealing shell (21) is a tubular structure having a first seam (211) and a second seam (212) opposite each other in the first direction, the sealing shell (21) is sleeved on the battery module (10), the first seam (211) is arranged at the non-harness end (12), the second seam (212) is arranged at the harness end (11), and the sealing glue (22) is bonded to the second seam (212).

4. The battery pack of claim 2, wherein, The sealing shell (21) includes a first sealing portion and a second sealing portion opposite each other in the first direction, the first sealing portion is sleeved on the non-harness end (12), the second sealing portion is sleeved on the harness end (11), the first sealing portion and the second sealing portion are sealingly connected, and the sealing glue (22) is bonded to the second sealing portion.

5. The battery pack of claim 4, wherein, The second sealing portion is provided with a harness hole, the harness extends out of the second sealing portion from the harness hole, and the sealing glue (22) is bonded to the harness and seals the harness hole.

6. The battery pack of claim 2, wherein, The sealing shell (21) includes a third sealing portion and a fourth sealing portion opposite each other in a second direction, the third sealing portion is sleeved on part of the harness end (11) and part of the non-harness end (12), the fourth sealing portion is sleeved on part of the harness end (11) and part of the non-harness end (12), and the third sealing portion and the fourth sealing portion are sealingly connected. The second direction is perpendicular to the first direction.

7. The battery pack of claim 6, wherein, The third sealing portion has a first groove, the fourth sealing portion has a second groove, the first groove and the second groove enclose a harness hole, the harness extends out of the third sealing portion and the fourth sealing portion from the harness hole, and the sealing glue (22) is bonded to the harness and seals the harness hole.

8. The battery pack of claim 2, wherein, The sealing assembly (20) further comprises a barley paper (16), the battery module (10) has an outer circumferential surface between the wire harness end (11) and the non-wire harness end (12), the barley paper (16) is wrapped on the outer circumferential surface, and the barley paper (16) is clamped between the sealing shell (21) and the battery module (10).

9. The battery pack of claim 8, wherein, The battery module (10) comprises a cell group (13), a first support (14) and a second support (15), the first support (14) and the second support (15) are oppositely arranged, the cell group (13) is arranged between the first support (14) and the second support (15), and the barley paper (16) is wrapped on the periphery of the first support (14) and the second support (15).

10. The battery pack of any one of claims 1-9, wherein, The material of the sealing shell (21) is a heat shrink material.

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