A battery pack and an electrical device

Abstract

An embodiment of the present application relates to a battery pack and an electrical device. The battery pack includes a housing, a battery cell assembly, a first insulating member, a first bracket, and an electrical connection assembly. The housing is provided with a housing space; the battery cell assembly is disposed in the housing space; the first insulating member is disposed between the battery cell assembly and the housing; a part of the first bracket is disposed on the first insulating member; the electrical connection assembly includes a first electrical connector, and the first electrical connector is disposed on the first bracket; the first bracket, the housing, and the first insulating member form a first space. When foreign objects enter the battery pack, the first space can accommodate the foreign objects and reduce the influence of the foreign objects on the use of the battery pack.

Description

Technical Field

[0001] The embodiments of the present application relate to the field of battery packs. Background Art

[0002] A battery pack is a device that converts external energy into electrical energy and stores it internally to supply power to external electrical devices (such as portable electronic devices, etc.) when needed. Currently, battery packs are widely used in electrical devices such as unmanned aerial vehicles and two-wheeled electric vehicles. Foreign objects from the outside may enter the interior of the battery pack, affecting the use of the battery pack. Summary of the Invention

[0003] In view of the above problems, the embodiments of the present application provide a battery pack and an electrical device, which reduce the influence of foreign objects from the outside on the use of the battery pack.

[0004] According to one aspect of the embodiments of the present application, a battery pack is provided. The battery pack includes a housing, a battery cell assembly, a first insulating member, a first bracket, and an electrical connection assembly. The housing is provided with a housing space; the battery cell assembly is disposed in the housing space; the first insulating member is disposed between the battery cell assembly and the housing; the first bracket is disposed in the housing space, and a part of the first bracket is disposed on the first insulating member; the electrical connection assembly includes a first electrical connector, and the first electrical connector is disposed on a side of the first bracket away from the first insulating member; wherein, the first bracket, the housing, and the first insulating member form a first space.

[0005] When foreign objects from the outside enter the battery pack, the first space can accommodate the foreign objects, reducing the influence of the foreign objects on the use of the battery pack, such as water.

[0006] When an external force acts on the housing, the first space buffers the external force, reducing damage to the first electrical connector disposed on a side of the first bracket away from the first insulating member.

[0007] In an optional manner, the first insulating member is formed by curing a first insulating material disposed between the periphery of the battery cell assembly and the housing.

[0008] In an optional manner, the first insulating material includes potting glue.

[0009] In an optional manner, in the first space, the distance between the first bracket and the housing is between 0.1 mm and 1 mm.

[0010] In an alternative manner, there is a first gap between the first bracket and the first insulating member. After forming the first insulating member and the first bracket, and forming the first gap between the first insulating member and the first bracket, potting glue can also be poured into the housing, thereby using the potting glue to increase the protection of the battery cell assembly. Additionally, when the battery cell assembly expands, the first gap can serve as the expansion space for the battery cell assembly.

[0011] In an alternative manner, the first bracket includes a first portion and a second portion. The second portion is disposed on a side of the first portion close to the first insulating member, and a part of the second portion is disposed in the first insulating member. There is the first gap between the first portion and the first insulating member.

[0012] In an alternative manner, the battery cell assembly includes a plurality of battery cells stacked in a first direction. Each battery cell includes an electrode assembly, a packaging case, and a tab. The packaging case includes a receiving portion and a sealing portion extending outward from the receiving portion; in a direction opposite to the first direction, the projection of the receiving portion is located within the area formed by the projection of the second portion. When the battery cell assembly expands, the force is evenly distributed.

[0013] In an alternative manner, the electrode assembly is disposed within the receiving portion. One end of the tab is connected to the electrode assembly, and the other end of the tab extends out from the sealing portion. The projection of the receiving portion is located within the area formed by the projection of the second portion. The second portion of the first bracket does not apply force to the electrode assembly within the receiving portion, which can reduce damage to the electrode assembly.

[0014] In an alternative manner, the first portion includes a first bottom wall and four first side walls. The first bottom wall and the four first side walls enclose a first recess, and the first electrical connector is disposed in the first recess. By providing the first recess, the first electrical connector is protected and damage to the first electrical connector is reduced.

[0015] In an alternative manner, the second portion includes four second side walls. The four second side walls extend from the first bottom wall in a direction away from the four first side walls. The first gap is formed between the four second side walls and the first bottom wall. Through the first gap, the amount of potting glue poured into the housing can be increased, thereby using the potting glue to increase the protection of the battery cell assembly. Additionally, when the battery cell assembly expands, the first gap can serve as the expansion space for the battery cell assembly.

[0016] In an alternative embodiment, the battery pack further includes a first conductive member disposed in the housing space. The first bracket includes a through hole, and the battery cell assembly includes a first connecting portion connected to the tab. The first conductive member connects the first connecting portion and the first electrical connector, and the connecting portion of the first conductive member and the first connecting portion is located within the through hole. By providing a through hole in the first bracket, it facilitates the connection between the battery cell assembly and the first electrical connector. The connecting portion of the first conductive member and the first connecting portion being located within the through hole is conducive to the fixation of the first conductive member and the first connecting portion, such as by welding or by using fasteners such as screws.

[0017] In an alternative embodiment, the first bracket includes a partition portion disposed between the through hole and the first electrical connector. By providing the partition portion, when the first insulating material is provided around the battery cell assembly and cured to form the first insulating member, the adhesion between the first insulating member and the first electrical connector is reduced.

[0018] In an alternative embodiment, the electrical connection assembly further includes a second electrical connector, and the battery pack further includes a second bracket connected to the first bracket. The second electrical connector is connected to the battery cell assembly, and the second electrical connector is partially disposed on a side of the second bracket away from the first bracket. By means of the second bracket, which is connected to the first bracket, the first electrical connector is protected, reducing the risk of damage to the first electrical connector. By the second bracket supporting at least a part of the second electrical connector, the second electrical connector is at least partially separately disposed from the first electrical connector, facilitating the repair and replacement of the second electrical connector or the first electrical connector.

[0019] In an alternative embodiment, the second bracket includes an opening, and the second electrical connector is connected to the first electrical connector through the opening. By means of the opening, it is convenient for the second electrical connector to be connected to the first electrical connector.

[0020] In an alternative embodiment, the opening includes a first opening, the second bracket includes a second recess, the first opening is located in the second recess, and the battery pack further includes a third conductive member at least partially disposed in the first opening. The third conductive member connects the first electrical connector and the second electrical connector. By means of the third conductive member, it is convenient for the first electrical connector to be connected to the second electrical connector.

[0021] In an alternative embodiment, the battery pack further includes a second insulating member located in the second recess. The second insulating member is formed by curing the second insulating material around the third conductive member, and the second insulating member protects the third conductive member.

[0022] In an alternative embodiment, the second insulating material includes potting compound.

[0023] In an alternative manner, at least one of the four first side walls is provided with a third recess, and the second bracket includes a first protrusion which is disposed in the third recess. The third recess and the first protrusion facilitate the connection between the second bracket and the first bracket.

[0024] In an alternative manner, the battery pack further includes a third insulating member which is disposed in the third recess, and the third insulating member connects the first protrusion and the third recess. The first protrusion and the third recess are sealed by the third insulating member, thereby sealing the connection between the first bracket and the second bracket.

[0025] In an alternative manner, the third insulating member includes a sealing ring.

[0026] In an alternative manner, the housing includes a first housing and a second housing. The first housing defines a second space, and the second housing defines a third space. The second housing is disposed in the first housing, and the second space and the third space enclose to form the housing space. The first bracket, the first housing and the first insulating member form the first space; the second housing is provided with a second protrusion which extends into the second space; along a direction opposite to the first direction, the projection of the second protrusion at least partially overlaps with the projection of the second bracket. By providing the second protrusion, impurities outside the housing, such as moisture, dust, etc., are reduced from entering the housing space, and damage to the first electrical connector, the second electrical connector, etc. in the housing space caused by impurities such as moisture and dust is reduced. The projection of the second protrusion at least partially overlaps with the projection of the second bracket. When an external force is applied to the second housing, the second housing moves towards the second bracket, and the second bracket abuts against the second protrusion of the second housing, restricting the second bracket.

[0027] In an alternative manner, along a direction opposite to the first direction, the projection of the second protrusion is at least partially located within the projection of the third recess. When the battery cell assembly expands, the first bracket moves along a direction opposite to the first direction, so that the first bracket pushes the second bracket to abut against the second protrusion of the second housing, restricting the first bracket.

[0028] In an alternative manner, the second housing and the first housing are connected along the first direction.

[0029] In an alternative manner, the battery pack further includes a fourth insulating member which is disposed between the first housing and the second housing. The fourth insulating member is used for sealing the first housing and the second housing when the second housing is disposed in the first housing.

[0030] In an alternative manner, the fourth insulating member includes a sealing ring.

[0031] In an alternative embodiment, the second bracket includes a third convex portion located in the second space. There is a third gap between the third convex portion and the first housing, and the third gap communicates with the first space. Foreign objects entering the housing space from the outside of the housing can be received in the first space and then blocked by the first insulating member, thereby reducing the entry of impurities such as water vapor and dust into the first electrical connector or the second electrical connector, and reducing the damage to the first electrical connector or the second electrical connector. Further, the third convex portion can limit the entry of foreign objects into the opening and reduce the influence of foreign objects on structural members such as the third conductive member.

[0032] According to one aspect of the embodiments of the present application, an electrical device is provided, including the battery pack described above.

[0033] The embodiments of the present application provide a battery pack. By providing a first bracket between the first electrical connector and the first insulating member of the battery pack, the first bracket, the housing, and the first insulating member form a first space. When foreign objects enter the battery pack from the outside, the first space can receive the foreign objects and reduce the influence of the foreign objects on the use of the battery pack, such as water. When an external force acts on the housing, the first space buffers the external force and reduces the damage to the first bracket and the first electrical connector. When the battery cell assembly expands, the first space can also serve as an expansion space to reduce the damage to the housing caused by the expansion of the battery cell assembly. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] One or more embodiments are exemplarily illustrated by the pictures in the corresponding drawings. These exemplary illustrations do not constitute limitations on the embodiments. Elements with the same reference numerals in the drawings are represented as similar elements, unless otherwise stated, and the drawings in the drawings do not constitute a scale limitation.

[0035] Figure 1 is a schematic diagram of the battery pack provided by the embodiments of the present application;

[0036] Figure 2 is an exploded schematic diagram of the battery pack provided by the embodiments of the present application;

[0037] Figure 3 is along the Figure 1 P-P line in the cross-sectional view provided by the embodiments of the present application;

[0038] Figure 4 is along the Figure 1 partial cross-sectional view along the Q-Q line provided by the embodiments of the present application;

[0039] Figure 5 is a schematic diagram of the first bracket provided by the embodiments of the present application when viewed in the first direction;

[0040] Figure 6 is a schematic diagram of the first bracket provided by the embodiments of the present application when viewed in the direction opposite to the first direction;

[0041] Figure 7 is a schematic diagram of the battery cell assembly provided by an embodiment of the present application;

[0042] Figure 8 is a schematic diagram of the battery cell provided by an embodiment of the present application;

[0043] Figure 9 is along the Figure 4 cross-sectional view of the R-R line in;

[0044] Figure 10 is a schematic diagram of a second electrical connector provided on the second bracket according to an embodiment of the present application;

[0045] Figure 11 is a perspective schematic diagram of the first bracket provided by an embodiment of the present application;

[0046] Figure 12 is provided by an embodiment of the present application Figure 3 enlarged schematic diagram of part A in;

[0047] Figure 13 is a schematic diagram of the second bracket provided by an embodiment of the present application. Detailed implementation manners

[0048] For ease of understanding the present application, the present application will be described in more detail below with reference to the accompanying drawings and specific embodiments. It should be noted that when an element is expressed as "fixed to" another element, it can be directly on the other element, or there can be one or more intermediate elements therebetween. When an element is expressed as "connected to" another element, it can be directly connected to the other element, or there can be one or more intermediate elements therebetween. The terms "vertical", "horizontal", "left", "right", "inner", "outer" and similar expressions used in this specification are only for the purpose of illustration.

[0049] Unless otherwise defined, all technical and scientific terms used in this specification have the same meaning as commonly understood by those skilled in the technical field to which this application belongs. The terms used in the specification of this application are only for the purpose of describing specific embodiments and are not used to limit this application. The term "and / or" used in this specification includes any and all combinations of one or more of the related listed items.

[0050] Please refer to Figures 1-4, the battery pack 100 includes a housing 10, a battery cell assembly 20, a first insulating member 30, a first bracket 40, and an electrical connection assembly 50. The housing 10 is provided with a housing space 10s. The battery cell assembly 20, the first insulating member 30, the first bracket 40, and the electrical connection assembly 50 are disposed in the housing space 10s. The first insulating member 30 is disposed between the battery cell assembly 20 and the housing 10, and the first bracket 40 is partially disposed on the first insulating member 30. The electrical connection assembly 50 includes a first electrical connector 501, and the first electrical connector 501 is disposed on a side of the first bracket 40 away from the first insulating member 30. The first bracket 40, the housing 10, and the first insulating member 30 form a first space 101s. The first bracket 4 is made of an insulating material. Optionally, the first bracket 4 is formed into an integrally molded structure by an injection molding process.

[0051] When foreign objects enter the battery pack 100, the first space 101s can accommodate the foreign objects and reduce the impact of the foreign objects on the use of the battery pack 100, such as water. In some embodiments, when an external force acts on the housing 10, the first space 101s buffers the external force and reduces the damage to the first electrical connector 501 disposed on a side of the first bracket 40 away from the first insulating member 30.

[0052] In some embodiments, the first insulating member 30 is formed by curing a first insulating material disposed between the periphery of the battery cell assembly 20 and the housing 10. The first insulating member 30 bonds and fixes the battery cell assembly 20 and the housing 10, restricting the movement of the battery cell assembly 20. Further, the first insulating member 30 reduces the contact between foreign objects and the battery cell assembly 20, enhancing the protection of the battery cell assembly 20. Optionally, the first insulating material includes potting glue.

[0053] In some embodiments, by disposing the first bracket 40 between the first electrical connector 501 and the first insulating member 30, the bonding of the first electrical connector 501 during the formation of the first insulating member 30 can be reduced, reducing the impact on the use of the first electrical connector 501. Further, it facilitates the repair or replacement of the first electrical connector 501.

[0054] In some embodiments, there is a first gap 401s between the first bracket 40 and the first insulating member 30. Through the first gap 401s, after forming the first insulating member 30 and the first bracket 40, and the first gap 401s between the first insulating member 30 and the first bracket 40, potting glue can also be poured into the housing 10, thereby using the potting glue to increase the protection of the battery cell assembly 20. Additionally, when the battery cell assembly 20 expands, the first gap 401s can serve as an expansion space for the battery cell assembly 20. Optionally, the battery cell assembly 20 includes a plurality of battery cells 20s stacked along a first direction L1, and along the first direction L1, there is a first gap 401s between the first bracket 40 and the first insulating member 30.

[0055] In some embodiments, the first electrical connector 501 includes a BMS (Battery Management System) circuit board, which is used to manage the charging and discharging of the battery cell assembly 20. For example, manage the charging and discharging power, temperature, time, etc. of the battery cell assembly 20.

[0056] Please refer to Figure 3 , the first bracket 40 includes a first part 401 and a second part 402. The second part 402 is disposed on the side of the first part 401 close to the first insulating member 30. The first insulating member 30 is disposed locally on the side of the second part 402 away from the first part 401. Specifically, a part of the structure of the second part 402 is bonded to the first insulating material during the curing process of the first insulating material, and a part of the structure of the second part 402 is fixed to the first insulating member 30. A first gap 401s is formed between the first part 401 and the first insulating member 30. When the first insulating material cures to form the first insulating member 30, the first gap 401 can further accommodate the flowing first insulating material, strengthening the protection effect on the battery cell assembly 20. When the battery cell assembly 20 expands, the first gap 401s can provide expansion space for the expansion of the battery cell assembly 20.

[0057] In some other embodiments, the second part 402 can be two structural members arranged parallel to each other at intervals, so that the second part 402 provides support for the first part 401 to form the above-mentioned first gap 401s. The specific structure of the second part 402 and its connection with the first part 401 are not specifically limited in this application. Optionally, the second part 402 is disposed around the side of the first part 401 facing the first insulating member 30.

[0058] Please refer to Figure 3 , Figure 5 , Figure 6 and Figure 11 , the first part 401 of the first bracket 40 includes a first bottom wall 4011s and four first side walls 4012s. The first bottom wall 4011s and the four first side walls 4012s enclose a first recess 4011, and the first electrical connector 501 is disposed in the first recess 4011. The first electrical connector 501 is protected by the second bracket 70, reducing damage to the first electrical connector 501.

[0059] Please continue to refer to Figure 3 , Figure 5 and Figure 6The second portion 402 of the first bracket 40 includes four second side walls 4021, and the four second side walls 4021 extend from the first bottom wall 4011s in a direction away from the four first side walls 4012s. The four second side walls 4021 can enhance the bonding force between the first bracket 40 and the first insulating member 30, and the partial structures of the four first side walls 4012s are located in the first insulating member 30, which is conducive to reducing impurities, such as moisture, dust, etc., from entering the first gap 401s.

[0060] The first insulating member 30 can be formed by solidifying the flowing first insulating material. The flowing first insulating material is placed in the housing 10. Before the flowing first insulating material solidifies, the first bracket 40 is placed in the flowing first insulating material. After the flowing first insulating material solidifies, the second portion 402 of the first bracket 40, that is, the portion of the four second side walls 4021, is bonded and fixed in the first insulating member 30.

[0061] See also Figure 4 , Figure 7 and Figure 8 The cell assembly 20 includes a plurality of cells 20s stacked along a first direction L1, each cell 20s includes an electrode assembly (not shown), a packaging shell 202 and a tab 203, the packaging shell 202 includes a receiving portion 2021 and an edge sealing portion 2022 extending outward from the receiving portion 2021, the electrode assembly is disposed in the receiving portion 2021, one end of the tab 203 is connected to the electrode assembly, and the other end of the tab 203 extends out of the packaging shell 202. The tab 203 includes a first tab 2031 and a second tab 2032, and the first tab 2031 and the second tab 2032 have opposite polarities. The tabs 203 of adjacent cells 20s are connected, and the plurality of cells 20s are connected in series or in parallel. The cell assembly 20 also includes a first connection portion 21, a second connection portion 22 and a third connection portion 23. Optionally, the first connection portion 21 is connected to the first pole ear 2031 of one of the battery cells 20s, and the second connection portion 22 is connected to the second pole ear 2032 of another battery cell 20s. The first connection portion 21 and the second connection portion 22 can be used to connect to an external device to supply power to the external device or charge the battery cell 20s from the external device. Optionally, the third connection portion 23 is connected to the pole ear 203, and the voltage, current and other information of the pole ear 203 can be collected through the third connection portion 23.

[0062] Along the direction opposite to the first direction L1 , the projection of the accommodation portion 2021 is located within the area formed by the projection of the second portion 402 , which is beneficial for more uniform force on the battery cell 20 s when the battery cell 20 s expands.

[0063] Along the direction opposite to the first direction L1 , the projection of the packaging shell 202 is located within the projection area formed by the second portion 402 , which is beneficial for connecting the tab 203 of the battery cell 20s with the electrical connection assembly 50 .

[0064] Please refer to Figure 4 , the battery pack 100 further includes a first conductive member 601. The first conductive member 601 is disposed in the housing space 10s, and the first conductive member 601 connects the first connection portion 21 and the first electrical connection member 501.

[0065] In some embodiments, the first conductive member 601 includes a wire, a conductive sheet, etc. Please refer to Figure 3 and Figure 10 , the battery pack 100 further includes a second bracket 70. The second bracket 70 is disposed in the housing space 10s, and the second bracket 70 covers the opening of the first recess 4011. The electrical connection assembly 50 further includes a second electrical connection member 502. At least a part of the second electrical connection member 502 is disposed on a side of the second bracket 70 away from the first bracket 40. The battery pack 100 further includes a second conductive member 602. The second conductive member 602 connects the second connection portion 22 and the second electrical connection member 502. Wherein, the second electrical connection member 502 includes a connector. Wherein, the second conductive member 602 includes a wire or a conductive sheet, etc.

[0066] Please refer to Figure 11 , the first bracket 40 is provided with a through hole 4012. The through hole 4012 includes a first through hole 4012a, a second through hole 4012b, and a third through hole 4012c. The second bracket 70 is provided with an opening 701. The opening 701 includes a first opening 7011 and a second opening 7012.

[0067] One end of the first conductive member 601 is connected to the first connection portion 21, and the other end of the first conductive member 601 is connected to the first electrical connection member 501. Optionally, the connection portion between the first conductive member 601 and the first connection portion 21 is located in the first through hole 4012a, which is beneficial to the fixation of the first conductive member 601 and the first connection portion 21, such as by welding, such as by fixing with fasteners such as screws. The connection portion between the second conductive member 602 and the second connection portion 22 is located in the second through hole 4012b, which is beneficial to the fixation of the second conductive member 602 and the second connection portion 22, such as by welding, such as by fixing with fasteners such as screws. The second conductive member 602 passes through the second opening 7012 and is connected to the second electrical connection member 502. The third connection portion 23 passes through the third through hole 4012c and is then connected to the first electrical connection member 501, and information such as the voltage and current of the battery cell 20s can be transmitted to the first electrical connection member 501. Optionally, the third connection portion 23 is directly welded to the first electrical connection member 501.

[0068] The battery pack 100 further includes a third conductive member 603. One end of the third conductive member 603 is disposed in the first opening 7011, and the third conductive member 603 electrically connects the first electrical connection member 501 and the second electrical connection member 502.

[0069] In some embodiments, the third conductive member 603 includes a connector disposed on the first electrical connector 501. One end of the connector away from the first electrical connector 501 is located in the first opening 7011, and the end of the connector away from the first electrical connector 501 is used to connect to the second electrical connector 502. The second electrical connector 502 includes a connector and can be used for plug-in connection with an external device.

[0070] Along the direction opposite to the first direction L1, the projection of the encapsulation shell 202 is located within the projection formation area of the second part 402, which is beneficial to the connection between the battery cell assembly 20 and the first conductive member 601, the second conductive member 602, or the third conductive member 603.

[0071] Please refer to Figure 11 , the first bracket 40 includes a partition portion 4013. The partition portion 4013 is connected to the first bottom wall 4011s and a part of the first side wall 4012s, and the partition portion 4013 is disposed between the through hole 4012 and the first electrical connector 501. The partition portion 4013 includes a first partition member 4013a, a second partition member 4013b, and a third partition member 4013c. The first partition member 4013a is located between the first through hole 4012a and the first bottom wall 4011s, the second partition member 4013b is located between the second through hole 4012b and the first bottom wall 4011s, and the third partition member 4013c is located between the third through hole 4012c and the first bottom wall 4011s. Through the arrangement of the partition portion 4013, when the first insulating material is provided around the battery cell assembly 20 and cured between the outer shell 10 to form the first insulating member 30, the entry of the first insulating member 30 into the first recess 4011 of the first bracket 40 can be reduced, and the adhesion between the first insulating member 30 and the first electrical connector 501 can be reduced.

[0072] Please refer to Figure 10 and Figure 13 , the second bracket 70 is recessed toward the first bracket 40 to form a second recess 702 facing away from the first bracket 40 and a convex surface 702s facing the first bracket 40. The first opening 7011 penetrates through the second recess 702 and the convex surface 702s. At least a part of the third conductive member 603 is disposed in the first opening 7011. The battery pack 100 further includes a second insulating member 80 disposed in the second recess 702. The second insulating member 80 is formed by curing a second insulating material disposed around the third conductive member 603. The second recess 702 positions the second insulating member 80, reduces the flow of the second insulating member 80, and reduces the adhesion of the second insulating member 80 to the first electrical connector 501 or the second electrical connector 502.

[0073] Optionally, the second insulating material includes sealant.

[0074] In some embodiments, the second insulating member 80 is further disposed in the second opening 7012, around the second conductive member 602, to protect the second conductive member 602.

[0075] Please refer to Figure 3 , Figure 12 and Figure 13 , a first portion 401 of the first bracket 40 further includes a third recess 4014, the third recess 4014 is provided on the first side wall 4012s, the second bracket 70 is provided with a first protrusion 703, the first protrusion 703 is provided in the third recess 4014, so as to realize the connection between the first bracket 40 and the second bracket 70 through the third recess 4014 and the first protrusion 703.

[0076] In some embodiments, please refer to Figure 12 , the battery pack 100 further includes a third insulating member 90, the third insulating member 90 is disposed between the first protrusion 703 and the third recess 4014, the third insulating member 90 is used to seal the first protrusion 703 and the third recess 4014, and the setting of the third insulating member 90 realizes the sealing between the first bracket 40 and the second bracket 70.

[0077] In some embodiments, the third insulating member 90 may include a sealant or a sealing ring.

[0078] Please refer to Figure 3 , the above-mentioned housing 10 includes a first housing 101 and a second housing 102, the first housing 101 is provided with a second space 1011, the second housing 102 is provided with a third space 1021, the second housing 102 is disposed in the first housing 101, the second space 1011 and the third space 1021 enclose to form a housing space 10s, and the first bracket 40, the first housing 101 and the first insulating member 30 form a first space 101s.

[0079] In some embodiments, along the first direction L1, the second space 1011 includes a first region 1011a and a second region 1011b, the first insulating member 30 is disposed in the first region 1011a, and the first portion 401 is disposed in the second region 1011b. A part of the second bracket 70 is located in the second space 1011, and a part of the second bracket 70 is located in the second region 1011b.

[0080] In some embodiments, please refer to Figure 12 , the battery pack 100 further includes a fourth insulating member 110, the fourth insulating member 110 is disposed between the first housing 101 and the second housing 102, and the fourth insulating member 110 is used to seal the first housing 101 and the second housing 102 when the second housing 102 is disposed in the first housing 101. Optionally, the fourth insulating member 110 includes a sealing ring or a sealant.

[0081] Please refer to Figure 2 and Figure 3, the first housing 101 is provided with protrusions 1011s. The protrusions 1011s are located in the second space 1011. The protrusions 1011s are used for the second housing 102 and the first housing 101 to be locked by bolts. The number of the protrusions 1011s is multiple, and the protrusions 1011 are distributed on the opposite two sides of the first housing 101.

[0082] Please refer to Figure 3 and Figure 12 , the second housing 102 is provided with a second convex portion 1022. The second convex portion 1022 extends into the second space 1011. The provision of the second convex portion 1022 can reduce impurities, such as external moisture, dust, etc., from entering the housing space 10s through the connection between the second housing 102 and the first housing 101, thereby reducing the damage to the electrical connection component 50 or the battery cell component 20 caused by impurities, such as moisture, dust, etc. Along the first direction L1, the projection of the second convex portion 1022 at least partially overlaps with the projection of the second bracket 70. When an external force acts on the second housing 102, the second housing 102 moves towards the second bracket 70, and the second bracket 70 abuts against the second convex portion 1022 of the second housing 102, restricting the movement of the second bracket 70.

[0083] In some embodiments, along the first direction L1, the projection of the second convex portion 1022 is at least partially located within the projection of the third concave portion 4014. When the battery cell component 20 expands, the first bracket 40 moves in the direction opposite to the first direction L1, so that the first bracket 40 pushes the second bracket 70 to abut against the second convex portion 1022 of the second housing 102, restricting the movement of the first bracket 40.

[0084] In some embodiments, the second housing 102 and the first housing 101 are connected along the first direction L1.

[0085] In some embodiments, the second housing 102 is made of a rigid material, such as a metal material, such as steel, steel alloy, etc. The first housing 101 is made of a flexible material, such as plastic. When the air pressure in the housing space 10s is greater than the air pressure outside the outer shell 10 of the battery pack 100 due to the expansion of the battery cells 20s, etc., the first housing 101 deforms, forming a pressure relief channel at the connection between the first housing 101 and the second housing 102, reducing the risk of the outer shell 10 bursting due to the expansion of the battery cells 20s, etc.

[0086] The second housing 102 is made of a rigid material. When an external force impacts the second housing 102, the damage to the second bracket 70 provided inside the second housing 102 can be reduced.

[0087] Please refer to Figure 12, the second bracket 70 includes a third convex portion 704 located in the second space 1011. There is a third gap 102s between the third convex portion 704 and the first housing 101, and the third gap 102s communicates with the first space 101s. Foreign objects entering the housing space 10s from the outside of the housing 10 can be received in the first space 101s, and then blocked by the first insulating member 30, thereby reducing the entry of impurities such as water vapor and dust into the first electrical connector 501 or the second electrical connector 502, and reducing the damage to the first electrical connector 501 or the second electrical connector 502. Further, the third convex portion 704 can limit the entry of foreign objects into the opening 701 of the second bracket 70, reducing the influence of foreign objects on structural members such as the third conductive member 603.

[0088] Please refer to Figure 2 and Figure 3 , in some embodiments, the first housing 101 extends a first protrusion 1012 towards the second space 1011. The first bracket 40 is provided with a second protrusion 404. The first protrusion 1012 is provided with a first opening 1012a, and the second protrusion 404 is provided with a second opening 4041. When the first bracket 40 is disposed on the first housing 101, the first protrusion 1012 and the second protrusion 404 are attached, the first opening 1012a and the second opening 4041 are opposite, and the first opening 1012a and the second opening 4041 are for bolts to pass through. The first bracket 40 is fixed in the first housing 101 through the first protrusion 1012 and the second protrusion 404.

[0089] The number of the first protrusions 1012 is multiple, and the multiple first protrusions 1012 are distributed on the first housing 101. The number of the second protrusions 404 is multiple, and the multiple second protrusions 404 are distributed on the first bracket 40. The first protrusions 1012 and the second protrusions 404 correspond one by one. Each first protrusion 1012 is provided with a first opening 1012a. Each second protrusion 404 is provided with a second opening 4041.

[0090] In some embodiments, please refer to Figure 2 , on a surface of the second housing 102 facing away from the first housing 101, a grip member 120 is further provided. The grip member 120 can facilitate the movement of the battery pack 100. The second housing 102 is made of a rigid material, and the grip member 120 is disposed on the second housing 102 to reduce damage to the battery pack 100.

[0091] The embodiments of the present application also provide an embodiment of an electrical device, which includes a battery pack 100. For the specific structure and functions of the battery pack 100, reference may be made to the above embodiments, and details will not be described herein one by one. The electrical device includes a battery. The electrical device further includes a load. The battery pack is used to supply power to the load. The electrical device may be an energy storage product, a mobile phone, a tablet computer, a drone, an electric vehicle with a single wheel or more than two wheels, or an electric cleaning tool, etc. For example, for the above-mentioned drone, the battery pack is carried on the drone, and the battery pack is used to supply power to the load on the drone, including a flight system, a control system, a camera system, etc.

[0092] It should be noted that the description and drawings of the present application provide preferred embodiments of the present application. However, the present application can be implemented in many different forms and is not limited to the embodiments described in this specification. These embodiments are not additional limitations to the content of the present application. The purpose of providing these embodiments is to make the understanding of the disclosed content of the present application more thorough and comprehensive. Moreover, the above technical features continue to be combined with each other to form various embodiments not listed above, which are all regarded as within the scope described in the specification of the present application; further, for those of ordinary skill in the art, improvements or changes can be made according to the above description, and all such improvements and changes should fall within the protection scope of the appended claims of the present application.

Claims

1. A battery pack, characterized in that, Comprising: A housing having a housing space; A battery cell assembly disposed in the housing space; A first insulating member disposed between the battery cell assembly and the housing; A first bracket disposed in the housing space, with a part of the first bracket disposed on the first insulating member; the first bracket includes a first part and a second part, the second part is disposed on a side of the first part close to the first insulating member, and the first insulating member is disposed locally on a side of the second part away from the first part; An electrical connection assembly including a first electrical connector disposed on a side of the first bracket away from the first insulating member; Wherein, the first bracket, the housing and the first insulating member form a first space; The first insulating member is formed by disposing a first insulating material around the battery cell assembly and between it and the housing and then curing.

2. The battery pack according to claim 1, characterized in that, There is a first gap between the first bracket and the first insulating member.

3. The battery pack according to claim 2, characterized in that, The first bracket includes a first part and a second part, the second part is disposed on a side of the first part close to the first insulating member, a part of the second part is disposed in the first insulating member, and there is the first gap between the first part and the first insulating member.

4. The battery pack according to claim 3, characterized in that, The battery cell assembly includes a plurality of battery cells stacked in a first direction, each battery cell includes an electrode assembly, a packaging shell and a tab, the packaging shell includes a receiving portion and a sealing edge portion extending outward from the receiving portion; In a direction opposite to the first direction, the projection of the receiving portion is located within the area formed by the projection of the second part.

5. The battery pack according to claim 4, characterized in that, The first part includes a first bottom wall and four first side walls, the first bottom wall and the four first side walls form a first recess, and the first electrical connector is disposed in the first recess.

6. The battery pack according to claim 5, characterized in that, The second part includes four second side walls, and the four second side walls extend from the first bottom wall in a direction away from the four first side walls.

7. The battery pack according to claim 4, characterized in that, The battery pack further includes a first conductive member disposed in the housing space, the first bracket includes a through hole, the battery cell assembly includes a first connection portion connected to the tab, the first conductive member connects the first connection portion and the first electrical connector, and the connecting portion of the first conductive member and the first connection portion is located within the through hole.

8. The battery pack according to claim 7, characterized in that, The first bracket includes a partition portion disposed between the through hole and the first electrical connector.

9. The battery pack according to claim 5, characterized in that, The electrical connection assembly further includes a second electrical connector and a second bracket, the second electrical connector is connected to the battery cell assembly, the second bracket is connected to the first bracket, and the second electrical connector is partially disposed on a side of the second bracket away from the first bracket.

10. The battery pack according to claim 9, characterized in that, The second bracket includes an opening, and the second electrical connector is connected to the first electrical connector through the opening.

11. The battery pack according to claim 10, characterized in that, The opening includes a first opening, the second bracket includes a second recess, the first opening is located in the second recess, the battery pack further includes a third conductive member, and at least a part of the third conductive member is disposed in the first opening, and the third conductive member connects the first electrical connector and the second electrical connector.

12. The battery pack according to claim 9, characterized in that, At least one of the four first side walls is provided with a third recess, and the second bracket includes a first convex portion, and the first convex portion is disposed in the third recess.

13. The battery pack according to claim 12, characterized in that, The battery pack further includes a third insulating member, the third insulating member is disposed in the third recess, and the third insulating member connects the first convex portion and the third recess.

14. The battery pack according to claim 12, characterized in that, The housing includes a first housing and a second housing, the first housing is provided with a second space, the second housing is provided with a third space, the second housing is disposed in the first housing, and the second space and the third space enclose to form the housing space, and the first bracket, the first housing and the first insulating member form the first space; The second housing is provided with a second convex portion, and the second convex portion extends into the second space; Along the first direction, the projection of the second convex portion and the projection of the second bracket at least partially overlap.

15. The battery pack according to claim 14, wherein, Along the first direction, the projection of the second convex portion is at least partially located within the projection of the third recess.

16. The battery pack according to claim 14, wherein, The battery pack further includes a fourth insulating member, and the fourth insulating member is disposed between the first housing and the second housing.

17. The battery pack according to claim 14, wherein, The second bracket includes a third convex portion located in the second space, and there is a third gap between the third convex portion and the first housing, and the third gap communicates with the first space.

18. An electrical device, wherein, Including the battery pack according to any one of claims 1-17.

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