Battery pack and electric equipment

Abstract

The embodiment of the utility model provides a battery pack and electric equipment. The battery pack comprises a shell, an isolating layer and a battery module, gaps in the battery modules are filled with first sealing waterproof glue; the isolation layer is provided with a first accommodating cavity, the first accommodating cavity is filled with the first sealing waterproof glue, and the battery module is arranged in the first accommodating cavity and is connected with the isolation layer through the first sealing waterproof glue to form an assembly; the shell is provided with a second containing cavity, the second containing cavity is filled with second sealing waterproof glue, and the assembly is arranged in the second containing cavity and connected with the second containing cavity through the second sealing waterproof glue. The mechanical safety of the whole battery pack is high, safety accidents such as internal short circuit, fire and explosion caused by waterproof failure of the battery pack can be avoided, and the use safety of the battery pack is high.

Description

Technical Field

[0001] The utility model relates to the technical field of batteries, in particular to a battery pack and an electrical device. Background Art

[0002] In the existing battery pack, when it drops, is squeezed or vibrates, the modules of the battery pack are likely to be separated from each other, resulting in a significant reduction in the mechanical safety of the entire battery pack. At the same time, it will also cause the battery pack to fail in waterproofing. Once the battery pack gets water, there is a high possibility of internal short circuit, fire, explosion and other safety accidents, making the use safety of the battery pack relatively low. Summary of the Utility Model

[0003] In view of the above problems, embodiments of the present utility model are proposed to provide a battery pack and an electrical device that overcome the above problems or at least partially solve the above problems.

[0004] To solve the above problems, embodiments of the present utility model disclose a battery pack, including: a housing, an isolation layer and battery modules; wherein,

[0005] A first sealing waterproof glue is filled in the gaps in the battery modules;

[0006] The isolation layer has a first accommodating cavity, the first accommodating cavity is filled with the first sealing waterproof glue, and the battery modules are arranged in the first accommodating cavity and connected to the isolation layer through the first sealing waterproof glue to form a combination;

[0007] The housing has a second accommodating cavity, the second accommodating cavity is filled with a second sealing waterproof glue, and the combination is arranged in the second accommodating cavity and connected to the combination through the second sealing waterproof glue.

[0008] Optionally, the isolation layer includes a heat shrinkable sleeve, a first waterproof sheet and a second waterproof sheet;

[0009] The first waterproof sheet is connected to one end of the heat shrinkable sleeve through a third sealing waterproof glue, the second waterproof sheet is connected to the other end of the heat shrinkable sleeve through the third sealing waterproof glue, and the first waterproof sheet, the second waterproof sheet and the heat shrinkable sleeve enclose the first accommodating cavity.

[0010] Optionally, the battery module includes a battery cell, a bus bar, a battery management and protection board and a support bracket;

[0011] The battery cell, the bus bar and the battery management and protection board are all connected to the support bracket, and a first glue filling port is arranged on the support bracket for filling glue into the battery module.

[0012] Optionally, the battery module further includes a collection wire harness, and wire passing holes are provided on both the first waterproof sheet and the second waterproof sheet;

[0013] The collection wire harness is arranged corresponding to the wire passing holes. One end of the collection wire harness is arranged in the first accommodation cavity, and the other end of the collection wire harness passes through the wire passing hole and is arranged outside the first accommodation cavity;

[0014] The wire passing hole is filled with the third sealing waterproof glue, and the collection wire harness is connected to the first waterproof sheet through the third sealing waterproof glue.

[0015] Optionally, the battery pack further includes an insulating sleeve;

[0016] The insulating sleeve is sleeved outside the battery module and is arranged between the isolation layer and the battery module.

[0017] Optionally, the housing includes a cylinder body, a first end cover and a second end cover;

[0018] The first end cover is connected to one end of the cylinder body through a fourth sealing waterproof glue, the second end cover is connected to the other end of the cylinder body through the fourth sealing waterproof glue, and the first end cover, the second end cover and the cylinder body enclose to form the second accommodation cavity.

[0019] Optionally, a second glue filling port is provided on the first end cover, and the second glue filling port is used for filling glue into the second accommodation cavity.

[0020] Optionally, the battery pack further includes a waterproof bracket corresponding to the first end cover or the second end cover;

[0021] The waterproof bracket is arranged in the cylinder body and encloses with the cylinder body to form a glue filling groove, and the glue filling groove is filled with a fifth sealing waterproof glue;

[0022] At least part of the first end cover or the second end cover is embedded in the glue filling groove and is connected to the waterproof bracket and the cylinder body through the fifth sealing waterproof glue.

[0023] Optionally, the battery pack includes a plurality of limiting convex structures;

[0024] The limiting convex structures are arranged between the outer wall of the assembly and the inner wall of the cylinder body, so that there is a glue filling space between the assembly and the cylinder body;

[0025] The plurality of limiting convex structures are arranged at intervals along the circumferential direction of the cylinder body.

[0026] In a second aspect, the present invention further provides an electrical equipment, including the above battery pack.

[0027] The embodiments of the present utility model have the following advantages:

[0028] In the embodiments of the present utility model, filling the first sealing waterproof glue in the gap in the battery module can improve the overall structural strength of the battery module; filling the first sealing waterproof glue in the first accommodating cavity enables the isolation layer to be connected to the battery module through the first sealing waterproof glue, which can improve the overall structural strength of the assembly; filling the second sealing waterproof glue in the second accommodating cavity enables the outer shell to be connected to the assembly through the second sealing waterproof glue, which can improve the overall structural strength of the battery pack, making the mechanical safety of the entire battery pack relatively high. In this way, when the battery pack experiences conditions such as dropping, squeezing, and vibration, it can avoid the situation of component separation in the battery pack, and further avoid safety accidents such as internal short circuit, fire, and explosion caused by waterproof failure of the battery pack, and the use safety of the battery pack is relatively high. Description of the Drawings

[0029] Figure 1 is an exploded structural schematic diagram of a battery pack of the present utility model;

[0030] Figure 2 is a structural schematic diagram of a battery module of the present utility model;

[0031] Figure 3 is one of the assembly process diagrams of a battery module and an isolation layer of the present utility model;

[0032] Figure 4 is another assembly process diagram of a battery module and an isolation layer of the present utility model;

[0033] Figure 5 is yet another assembly process diagram of a battery module and an isolation layer of the present utility model;

[0034] Figure 6 is a structural schematic diagram of an assembly of the present utility model;

[0035] Figure 7 is a schematic diagram of the connection between a limiting protrusion and the assembly of the present utility model;

[0036] Figure 8 is one of the assembly process diagrams of the assembly and the outer shell of the present utility model;

[0037] Figure 9 is another assembly process diagram of the assembly and the outer shell of the present utility model;

[0038] Figure 10 is yet another assembly process diagram of the assembly and the outer shell of the present utility model.

[0039] Description of reference numerals:

[0040] 1. Shell; 11. Cylinder; 12. First end cover; 121. Second glue filling port; 13. Second end cover; 14. Surface cover; 2. Isolation layer; 21. Heat shrink tubing; 22. First waterproof sheet; 221. Wire hole; 23. Second waterproof sheet; 3. Battery module; 31. Battery cell; 32. Bus bar; 33. Battery management protection board; 34. Support bracket; 341. First glue filling port; 35. Collection harness; 4. Waterproof bracket; 5. Limiting protrusion structure; 6. Insulation sleeve. DETAILED DESCRIPTION

[0041] In order to make the above-mentioned purposes, features and advantages of the present invention more obvious and easy to understand, the present invention is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0042] The term "first" or "second" in the specification and claims of this application may include one or more of the features explicitly or implicitly. In the description of this utility model, unless otherwise specified, "multiple" means two or more. In addition, "and / or" in the specification and claims means at least one of the connected objects, and the character " / " generally means that the objects connected before and after are in an "or" relationship.

[0043] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0044] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" 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 it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0045] One of the core concepts of the embodiments of the present utility model is to disclose a battery pack, such as Figure 1As shown, the battery pack may include: a housing 1, an isolation layer 2, and a battery module 3. Among them, a first sealing and waterproof adhesive is filled in the gap in the battery module 3. The isolation layer 2 has a first accommodation cavity, and the first accommodation cavity is filled with the first sealing and waterproof adhesive. The battery module 3 is disposed in the first accommodation cavity and is connected to the isolation layer 2 through the first sealing and waterproof adhesive to form an assembly. The housing 1 has a second accommodation cavity, and the second accommodation cavity is filled with a second sealing and waterproof adhesive. The assembly is disposed in the second accommodation cavity and is connected to the assembly through the second sealing and waterproof adhesive.

[0046] In the embodiment of the present utility model, filling the first sealing and waterproof adhesive in the gap in the battery module 3 can improve the overall structural strength of the battery module 3. Filling the first sealing and waterproof adhesive in the first accommodation cavity enables the isolation layer 2 to be connected to the battery module 3 through the first sealing and waterproof adhesive, which can improve the overall structural strength of the assembly. Filling the second sealing and waterproof adhesive in the second accommodation cavity enables the housing 1 to be connected to the assembly through the second sealing and waterproof adhesive, which can improve the overall structural strength of the battery pack, making the mechanical safety of the entire battery pack relatively high. In this way, when the battery pack undergoes conditions such as dropping, squeezing, and vibration, it can avoid the situation of component separation in the battery pack, and further avoid safety accidents such as internal short circuit, fire, and explosion caused by waterproof failure of the battery pack, and the use safety of the battery pack is relatively high.

[0047] In the embodiment of the present utility model, the battery module 3 can be assembled from multiple devices, and there are gaps between the devices. Filling the first sealing and waterproof adhesive in the gaps can tightly connect the devices to each other, which can improve the overall structural strength of the battery module 3. In the event of impacts, vibrations, squeezes, etc., it can prevent the separation of the devices in the battery module 3.

[0048] Specifically, the isolation layer 2 may have a first accommodation cavity, and the battery module 3 is accommodated in the first accommodation cavity. Filling the first sealing and waterproof adhesive in the first accommodation cavity enables the isolation layer 2 and the battery module 3 to be bonded through the first sealing and waterproof adhesive to form an assembly. On the one hand, it can form a waterproof guarantee to prevent water from entering and short-circuiting inside the battery module 3. On the other hand, the overall structural strength of the assembly is relatively strong. In the event of impacts, vibrations, squeezes, etc., it can prevent the separation between the battery module 3 and the isolation layer 2.

[0049] Specifically, the first sealing and waterproof adhesive may have strong adhesiveness, waterproofness, and sealing performance, and may specifically be silicone, polyurethane, etc. Optionally, the waterproof grade of the first sealing and waterproof adhesive may be greater than or equal to IPX7 to further improve the waterproof performance.

[0050] Specifically, the outer shell 1 has a second accommodation cavity, and the assembly can be accommodated in the second accommodation cavity. A second sealing waterproof glue is filled in the second accommodation cavity, so that the assembly and the outer shell 1 can be bonded through the second sealing waterproof glue. On the one hand, a waterproof guarantee can be formed to prevent water from entering the battery module 3 and causing a short circuit; on the other hand, the overall structural strength of the battery pack can be improved. In the event of impacts, vibrations, squeezes, etc., separation between the assembly and the outer shell 1 can be avoided.

[0051] Specifically, the second sealing waterproof glue can have strong adhesiveness, waterproofness, and sealing performance, and can specifically be silicone, polyurethane, etc. Optionally, the waterproof grade of the second sealing waterproof glue can be greater than or equal to IPX7 to further improve the waterproof performance.

[0052] In the embodiment of the present utility model, there is primary glue injection in the battery module 3, primary glue injection in the first accommodation cavity, and primary glue injection in the second accommodation cavity. Through three times of glue injection treatment, the structural strength of the battery pack is relatively strong, separation between the components of the battery pack can be avoided, and further, the probability of waterproof failure of the battery pack can be reduced, internal short circuits, fires, and explosion safety accidents of the battery pack can be avoided, and the safety of the battery pack is relatively strong.

[0053] Furthermore, the glue injection in the battery module 3 and the glue injection operation in the first accommodation cavity can be carried out synchronously or separately, and the embodiment of the present utility model does not make specific limitations on this.

[0054] Optionally, the isolation layer 2 can include a heat shrinkable sleeve 21, a first waterproof sheet 22, and a second waterproof sheet 23; the first waterproof sheet 22 is connected to one end of the heat shrinkable sleeve 21 through a third sealing waterproof glue, the second waterproof sheet 23 is connected to the other end of the heat shrinkable sleeve 21 through a third sealing waterproof glue, and the first waterproof sheet 22, the second waterproof sheet 23, and the heat shrinkable sleeve 21 can enclose to form a first accommodation cavity.

[0055] In the embodiment of the present utility model, the first waterproof sheet 22 is connected to one end of the heat shrinkable sleeve 21 through a third sealing waterproof glue, and the second waterproof sheet 23 is connected to the other end of the heat shrinkable sleeve 21 through a third sealing waterproof glue, that is, the heat shrinkable sleeve 21, the first waterproof sheet 22, and the second waterproof sheet 23 are formed by splicing. In this way, the first waterproof sheet 22 can be fixed to one end of the heat shrinkable sleeve 21 through the third sealing waterproof glue first, then the first sealing waterproof glue is injected into the heat shrinkable sleeve 21, and further, the second waterproof sheet 23 is fixed to the other end of the heat shrinkable sleeve 21 through the third sealing waterproof glue, so that the glue injection in the battery module 3 and the glue injection operation in the first accommodation cavity can be carried out synchronously, and the assembly process of the battery pack can be simplified.

[0056] Specifically, the heat-shrinkable sleeve 21, the first waterproof sheet 22, and the second waterproof sheet 23 can all be insulating components. The interior of the heat-shrinkable sleeve 21 is hollow and has openings at both ends. Both the first waterproof sheet 22 and the second waterproof sheet 23 can be in a sheet structure and can be used to block the openings at the ends of the heat-shrinkable sleeve 21. The materials of the first waterproof sheet 22 and the second waterproof sheet 23 can be waterproof foam, polycarbonate (PC plastic), etc.

[0057] Specifically, the heat-shrinkable sleeve 21 and the first waterproof sheet 22 can be connected to form a first component with a receiving space, which is convenient for providing a potting space for potting the battery module 3 and further improving the operation convenience of potting the battery module 3.

[0058] Specifically, the first waterproof sheet 22 is connected to one end of the heat-shrinkable sleeve 21 through a third sealing waterproof glue, and the second waterproof sheet 23 is connected to the other end of the heat-shrinkable sleeve 21 through a third sealing waterproof glue. Moreover, the first waterproof sheet 22, the second waterproof sheet 23, and the heat-shrinkable sleeve 21 can enclose to form a first receiving cavity, which can improve the sealing and waterproof performance of the first receiving cavity and further reduce the probability of internal short circuit of the battery module 3.

[0059] Specifically, the third sealing waterproof glue can have good sealing performance, waterproof performance, and adhesiveness, and can specifically be silicone or polyurethane, etc. Optionally, the waterproof grade of the third sealing waterproof glue is greater than or equal to IPX7 to further improve the waterproof performance.

[0060] Optionally, the battery module 3 can include battery cells 31, busbars 32, a battery management and protection board 33, and a support bracket 34; the battery cells 31, the busbars 32, and the battery management and protection board 33 are all connected to the support bracket 34, and a first potting port 341 is provided on the support bracket 34 for potting the battery module 3.

[0061] In the embodiment of the present utility model, potting the battery module 3 through the first potting port 341 facilitates the first sealing waterproof glue to fully flow into the gaps in the battery module 3, thereby improving the connection strength between the components in the battery module 3 and making the overall structural strength of the battery module 3 relatively strong.

[0062] Specifically, the support bracket 34 can be the main frame of the battery module 3 and can be used to support and arrange the battery cells 31, the busbars 32, the battery management and protection board 33, etc. The battery cells 31, the busbars 32, and the battery management and protection board 33 can be connected to the support bracket 34 directly or indirectly, etc.

[0063] Specifically, the battery cell 31 can be a lithium-ion battery cell 31 or a lithium battery cell 31, etc. The battery pack may include multiple battery cells 31, and the multiple battery cells 31 can be connected in series and parallel. The specific number of battery cells 31 can be set according to requirements, and the embodiments of the present invention do not make specific limitations thereto.

[0064] Specifically, the battery cell 31 can be installed in the support bracket 34, and the bus bar 32 can be welded to the multiple battery cells 31 by spot welding. The tabs of the battery cell 31 can extend from the bus bar 32, and the battery management and protection board 33 can be laser spot welded to the tabs. The battery management and protection board 33 is used for voltage acquisition. Among them, the battery protection board is a BMS (BATTERY MANAGEMENT SYSTEM) board.

[0065] Optionally, the battery module 3 further includes a collection wire harness 35. Through holes 221 are provided on both the first waterproof sheet 22 and the second waterproof sheet 23; the collection wire harness 35 is correspondingly arranged with the through holes 221. One end of the collection wire harness 35 is arranged in the first accommodation cavity, and the other end of the collection wire harness 35 passes through the through hole 221 and is arranged outside the first accommodation cavity; the through hole 221 is filled with a third sealing waterproof glue, and the collection wire harness 35 is connected to the first waterproof sheet 22 through the third sealing waterproof glue.

[0066] In the embodiments of the present invention, one end of the collection wire harness 35 is arranged in the first accommodation cavity, and the other end of the collection wire harness 35 passes through the through hole 221 and is arranged outside the first accommodation cavity, which is convenient for the collection wire harness 35 to output the signal of the battery module 3. Filling the through hole 221 with the third sealing waterproof glue can improve the sealing and waterproof performance of the first waterproof sheet 22 and the second waterproof sheet 23 at the through hole 221, thereby improving the sealing performance of the first accommodation cavity and preventing water from entering the battery module 3 and causing a short circuit phenomenon.

[0067] Specifically, through holes 221 are provided on both the first waterproof sheet 22 and the second waterproof sheet 23. The number of through holes 221 on the first waterproof sheet 22 and the second waterproof sheet 23 can be set according to the number of the collection wire harnesses 35, and the embodiments of the present invention do not make specific limitations thereto.

[0068] Optionally, the battery pack further includes an insulating sleeve 6; the insulating sleeve 6 can be sleeved outside the battery module 3 and is arranged between the isolation layer 2 and the battery module 3.

[0069] In the embodiments of the present invention, the insulating sleeve 6 is sleeved outside the battery module 3, so that the battery module 3 has insulation during transportation, and a short circuit phenomenon can be avoided before the battery module 3 is assembled with the isolation layer 2.

[0070] Specifically, after the battery module 3 is assembled, an insulating sleeve 6 can be disposed outside the battery module 3 to assemble the second component. The outer periphery of the second component is an insulating structure, which can improve the safety of the second component during transportation.

[0071] Specifically, the insulating sleeve 6 can be made of highland barley paper or other insulating materials, which is not specifically limited in the embodiment of the present utility model.

[0072] In some other optional embodiments of the utility model, the outer shell 1 may include a cylinder 11, a first end cover 12 and a second end cover 13; the first end cover 12 may be connected to one end of the cylinder 11 by a fourth sealing waterproof glue, and the second end cover 13 may be connected to the other end of the cylinder 11 by a fourth sealing waterproof glue, and the first end cover 12, the second end cover 13 and the cylinder 11 enclose a second accommodating cavity.

[0073] In the embodiment of the utility model, the first end cap 12 can be connected to one end of the cylinder 11 by the fourth sealing waterproof glue, and the second end cap 13 can be connected to the other end of the cylinder 11 by the fourth sealing waterproof glue, so that the first end cap 12, the second end cap 13 and the cylinder 11 are spliced ​​together, which is convenient for filling glue into the second accommodating cavity. Moreover, the first end cap 12 and the second end cap 13 are both bonded to the cylinder 11 by the fourth sealing waterproof glue, which can also improve the sealing and waterproof properties of the second accommodating cavity, thereby reducing the probability of waterproof short circuits in the internal components of the battery module 3.

[0074] Specifically, the interior of the cylinder 11 is hollow and has openings at both ends. The first cover plate and the second cover plate are used to seal the openings at the ends of the cylinder 11. The first cover plate, the second cover plate and the cylinder 11 can all be metal parts to have strong structural strength to protect the battery module 3.

[0075] Specifically, the cylinder 11 and the second cover plate may be bonded first, then the assembly may be installed, and then the second sealing and waterproof glue may be poured. Alternatively, the cylinder 11 may be sleeved outside the assembly, then the cylinder 11, the first cover plate and the second cover plate may be bonded, and then the second sealing and waterproof glue may be poured into the second accommodating cavity through the glue pouring port provided on the first cover plate.

[0076] Specifically, the fourth sealing waterproof glue has good sealing, waterproof and adhesive properties, and can be silicone or polyurethane, etc. Optionally, the waterproof grade of the fourth sealing waterproof glue can be greater than or equal to IPX7 to further improve the waterproof performance.

[0077] Optionally, a second glue filling port 121 is provided on the first cover plate, and the second glue filling port 121 is used to fill glue into the second accommodating cavity, which can improve the convenience and reliability of filling the second sealing and waterproof glue in the second accommodating cavity.

[0078] Specifically, the second encapsulating waterproof glue is poured into the second accommodating cavity through the second glue pouring port 121, so that the assembly and the housing 1 are fully bonded, and the connection strength is relatively high.

[0079] Optionally, the battery pack further includes a waterproof bracket 4 correspondingly arranged with the first end cover 12 and the second end cover 13; the waterproof bracket 4 is arranged in the cylinder body 11 and encloses a glue pouring groove with the cylinder body 11, and the glue pouring groove is filled with a fifth encapsulating waterproof glue; at least part of the first end cover 12 or the second end cover 13 is embedded in the glue pouring groove and is connected to the waterproof bracket 4 and the cylinder body 11 through the fifth encapsulating waterproof glue.

[0080] In the embodiment of the present utility model, the waterproof bracket 4 encloses a glue pouring groove with the cylinder body 11, which is convenient for filling the fifth encapsulating waterproof glue. Embedding at least part of the first end cover 12 or the second end cover 13 in the glue pouring groove is convenient for bonding and fixing the first end cover 12 or the second end cover 13 to the cylinder body 11, and improving the sealing and waterproof performance of the second accommodating cavity.

[0081] Specifically, the number of the waterproof brackets 4 can be two. One waterproof bracket 4 can cooperate with the first end cover 12 to be bonded and fixed to one end of the cylinder body 11, and the other waterproof bracket 4 can cooperate with the second end cover 13 to be bonded and fixed to the other end of the cylinder body 11.

[0082] Specifically, the waterproof bracket 4 can be arranged in the cylinder body 11 and enclose an annular groove with the end of the cylinder body 11.

[0083] Specifically, the housing 1 can further include a face cover 14, and the face cover 14 can be connected to the side of the first end cover 12 away from the cylinder body 11.

[0084] Optionally, the battery pack further includes a plurality of limiting convex structures 5; the limiting convex structures 5 are arranged between the outer wall of the assembly and the inner wall of the cylinder body 11 so that there is a glue pouring space between the assembly and the cylinder body 11; the plurality of limiting convex structures 5 are arranged at intervals along the circumferential direction of the cylinder body 11.

[0085] In the embodiment of the present utility model, the plurality of limiting convex structures 5 are arranged at intervals along the circumferential direction of the cylinder body 11, so that there is a glue pouring space between the circumferential inner wall of the cylinder body 11 and the assembly, which can improve the sufficiency and reliability of the bonding between the cylinder body 11 and the assembly.

[0086] Specifically, before the assembly is placed into the second accommodating cavity, the limiting convex structure 5 can be connected to the outer wall of the assembly in a splicing manner, or can also be connected to the inner wall of the cylinder body 11 in a splicing manner.

[0087] Specifically, multiple limiting projection structures 5 can be arranged at intervals along the circumferential direction of the cylinder body 11, and multiple limiting projection structures 5 can also be arranged at intervals along the axial direction of the cylinder body 11. The specific number of the limiting projection structures 5 can be set according to actual requirements, and the embodiments of the present utility model do not make specific limitations thereto.

[0088] Specifically, an assembly process of the battery pack may include the following steps:

[0089] As Figure 2 shown, first assemble the battery module 3.

[0090] As Figure 3 shown, sleeved the heat shrinkable tube 21 on the battery module 3.

[0091] As Figure 4 shown, pass the acquisition wire harness 35 of the battery module 3 through the wire passing hole 221, then bond and fix the first waterproof sheet 22 to the heat shrinkable tube 21 by the third sealing waterproof glue to form a first assembly, and then use the third sealing waterproof glue to fill the wire passing hole 221 to realize the sealed connection of the acquisition wire harness 35 and the first waterproof sheet 22.

[0092] As Figure 5 shown, adjust the orientation of the first assembly, the first waterproof sheet 22 is located at the bottom end, the support bracket 34 is located above, and fill the glue through the first glue filling port 341 on the support bracket 34 so that the first sealing waterproof glue flows into the gaps in the battery module 3 and the gaps between the battery module 3 and the first assembly.

[0093] As Figure 6 shown, after the first sealing waterproof glue is potted, bond and fix the second waterproof sheet 23 to the heat shrinkable tube 21 by the third sealing waterproof glue, and at the same time, extend the acquisition wire harness 35 out of the wire passing hole 221 on the second waterproof sheet 23, and apply the third sealing waterproof glue in the wire passing hole 221 to obtain an assembly.

[0094] As Figure 7 shown, bond the limiting projection structure 5 on the outer periphery of the assembly.

[0095] As Figure 8 and 9 shown, install the assembly into the cylinder body 11, and bond and fix the second end cover 13, the waterproof bracket 4 and the cylinder body 11 by the fourth sealing waterproof glue.

[0096] As Figure 10 shown, bond and fix the first end cover 12, the waterproof bracket 4 and the cylinder body 11 by the fourth sealing waterproof glue, and then pour and seal the second sealing waterproof glue into the second accommodating cavity through the second glue filling port 121 on the first end cover 12.

[0097] In the embodiment of the present utility model, the first sealing waterproof glue is filled in the first accommodating cavity, so that the first sealing waterproof glue is filled in the gaps in the battery module 3, and the first-level waterproofing can be achieved; both the first waterproof sheet 22 and the second waterproof sheet 23 are adhesively fixed to the heat shrinkable sleeve 21 through the third waterproof sealing glue, so that the first accommodating cavity is sealed, and the second-level waterproofing can be achieved; the second sealing waterproof glue is filled in the second accommodating cavity, and the third-level waterproofing can be achieved; both the first end cover 12 and the second end cover 13 are adhesively fixed to the cylinder body 11 through the fourth sealing waterproof glue, and the fourth-level waterproofing can be achieved. Among them, in the direction from the inside to the outside of the battery pack, the first-level waterproofing, the second-level waterproofing, the third-level waterproofing, and the fourth-level waterproofing can be sequentially arranged. These four levels of waterproofing act independently. Even if a certain level of waterproofing fails, there are other levels of waterproofing to ensure the waterproofness of the battery module 3, which can greatly reduce the probability of the battery module 3 getting water and short-circuiting, and significantly improve the safety of the battery pack.

[0098] The battery pack described in the embodiment of the present utility model has at least the following advantages:

[0099] In the embodiment of the present utility model, filling the first sealing waterproof glue in the gaps in the battery module can improve the overall structural strength of the battery module; filling the first sealing waterproof glue in the first accommodating cavity enables the isolation layer to be connected to the battery module through the first sealing waterproof glue, which can improve the overall structural strength of the assembly; filling the second sealing waterproof glue in the second accommodating cavity enables the outer shell to be connected to the assembly through the second sealing waterproof glue, which can improve the overall structural strength of the battery pack, making the mechanical safety of the entire battery pack relatively high. In this way, when the battery pack experiences conditions such as dropping, squeezing, and vibration, it can avoid the situation of component separation in the battery pack, and further avoid safety accidents such as internal short-circuiting, ignition, and explosion caused by the failure of the waterproofing of the battery pack, and the use safety of the battery pack is relatively high.

[0100] In a second aspect, the embodiment of the present utility model also discloses an electrical device, which specifically may include the above-mentioned battery pack.

[0101] Specifically, the electrical device may be a vehicle such as an electric motorcycle, an electric bicycle, or an electric scooter, or may also be an electronic device such as a mobile phone or a computer.

[0102] The electrical device described in the embodiment of the present utility model has at least the following advantages:

[0103] In the embodiment of the present utility model, filling a first sealing waterproof glue in the gap in the battery module can improve the overall structural strength of the battery module; filling the first sealing waterproof glue in the first accommodating cavity, so that the isolation layer is connected to the battery module through the first sealing waterproof glue, can improve the overall structural strength of the assembly; filling the second sealing waterproof glue in the second accommodating cavity, so that the outer shell is connected to the assembly through the second sealing waterproof glue, can improve the overall structural strength of the battery pack, making the mechanical safety of the entire battery pack relatively high. In this way, when the battery pack experiences conditions such as dropping, squeezing, and vibration, it can avoid the situation of component separation in the battery pack, and further avoid safety accidents such as internal short circuit, fire, and explosion caused by waterproof failure of the battery pack, and the use safety of the battery pack is relatively high.

[0104] Although the preferred embodiments of the embodiments of the present utility model have been described, those skilled in the art can make additional changes and modifications once they know the basic creative concept. Therefore, the appended claims are intended to be construed to include the preferred embodiments and all changes and modifications falling within the scope of the embodiments of the present utility model.

[0105] Finally, it should also be noted that in this article, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the term "comprising", "including" or any other variant thereof is intended to cover non-exclusive inclusion, so that a process, method, article or terminal device comprising a series of elements not only includes those elements, but also includes other elements not expressly listed, or further includes elements inherent to such process, method, article or terminal device. Without further limitation, an element defined by the statement "comprising a..." does not exclude the presence of additional identical elements in the process, method, article or terminal device comprising the element.

[0106] The above provides a detailed introduction to a battery pack and an electrical device provided by the present utility model. Specific examples are used in this article to elaborate on the principle and implementation manner of the present utility model. The description of the above embodiments is only used to help understand the method and its core idea of the present utility model; at the same time, for those of ordinary skill in the art, according to the idea of the present utility model, there will be changes in the specific implementation manner and application scope. In summary, the content of this specification should not be construed as a limitation to the present utility model.

Claims

1. A battery pack, characterized in that: include: A housing (1), an isolation layer (2) and a battery module (3); wherein: The gap in the battery module (3) is filled with a first sealing waterproof glue; The isolation layer (2) has a first accommodating cavity, the first accommodating cavity is filled with the first sealing waterproof glue, the battery module (3) is arranged in the first accommodating cavity and is connected to the isolation layer (2) through the first sealing waterproof glue to form an assembly; The housing (1) has a second accommodating cavity, the second accommodating cavity is filled with a second sealing waterproof glue, the assembly is arranged in the second accommodating cavity and is connected to the assembly via the second sealing waterproof glue.

2. The battery pack according to claim 1, characterized in that: The isolation layer (2) comprises a heat shrinkable tube (21), a first waterproof sheet (22) and a second waterproof sheet (23); The first waterproof sheet (22) is connected to one end of the heat shrinkable tube (21) via a third sealing waterproof adhesive, and the second waterproof sheet (23) is connected to the other end of the heat shrinkable tube (21) via the third sealing waterproof adhesive; the first waterproof sheet (22), the second waterproof sheet (23) and the heat shrinkable tube (21) enclose the first accommodating cavity.

3. The battery pack according to claim 2, characterized in that: The battery module (3) comprises a battery cell (31), a bus bar (32), a battery management protection board (33) and a support bracket (34); The battery cell (31), the busbar (32) and the battery management protection board (33) are all connected to the support bracket (34); the support bracket (34) is provided with a first glue injection port (341), and the first glue injection port (341) is used to inject glue into the battery module (3).

4. The battery pack according to claim 2, characterized in that: The battery module (3) further comprises a collection harness (35), and both the first waterproof sheet (22) and the second waterproof sheet (23) are provided with a wire hole (221); The collection wire harness (35) is arranged corresponding to the wire hole (221), one end of the collection wire harness (35) is arranged in the first accommodating cavity, and the other end of the collection wire harness (35) passes through the wire hole (221) and is arranged outside the first accommodating cavity; The wire hole (221) is filled with the third sealing waterproof glue, and the collection wire harness (35) is connected to the first waterproof sheet (22) via the third sealing waterproof glue.

5. The battery pack according to claim 1, characterized in that: The battery pack also includes an insulating sleeve (6); The insulating sleeve (6) is sleeved outside the battery module (3) and is arranged between the isolation layer (2) and the battery module (3).

6. The battery pack according to claim 1, characterized in that: The housing (1) comprises a cylinder (11), a first end cover (12) and a second end cover (13); The first end cover (12) is connected to one end of the cylinder (11) via a fourth sealing waterproof adhesive, and the second end cover (13) is connected to the other end of the cylinder (11) via the fourth sealing waterproof adhesive. The first end cover (12), the second end cover (13) and the cylinder (11) together form the second accommodating cavity.

7. The battery pack according to claim 6, characterized in that: The first end cover (12) is provided with a second glue pouring port (121), and the second glue pouring port (121) is used for pouring glue into the second accommodating cavity.

8. The battery pack according to claim 6, characterized in that: The battery pack further comprises a waterproof bracket (4) arranged corresponding to the first end cover (12) or the second end cover (13); The waterproof bracket (4) is arranged in the cylinder (11) and is enclosed with the cylinder (11) to form a glue pouring groove, and the glue pouring groove is filled with a fifth sealing waterproof glue; At least a portion of the first end cover (12) or the second end cover (13) is embedded in the glue pouring groove, and is connected to the waterproof bracket (4) and the cylinder (11) via the fifth sealing waterproof glue.

9. The battery pack according to claim 7, characterized in that: The battery pack comprises a plurality of position limiting protrusion structures (5); The limiting protrusion structure (5) is arranged between the outer wall of the assembly and the inner wall of the cylinder (11), so that there is a glue injection space between the assembly and the cylinder (11); A plurality of the limiting protrusion structures (5) are arranged at intervals along the circumference of the cylinder (11).

10. An electrical device, characterized in that: A battery pack comprising any one of claims 1 to 9.

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