Battery pack

Abstract

The embodiment of the invention provides a battery pack. The battery pack comprises a first shell, a battery module and a second shell, the first housing has a first opening. The battery module is accommodated in the first shell. The second shell is connected to the first shell, the second shell comprises a first sub-shell and a second sub-shell, the first sub-shell is connected to the first shell and covers at least part of the first opening, and the second sub-shell is connected to the first shell. The first sub-housing and / or the second sub-housing are / is configured to be openable.

Description

battery pack Technical Field

[0001] The present application relates to the field of batteries, and in particular to a battery pack. Background Art

[0002] Rechargeable batteries are batteries that can be recharged after discharge to reactivate the active materials and continue to be used. Rechargeable batteries are widely used in electronic devices such as mobile phones and laptops.

[0003] Battery modules typically consist of multiple cells to meet the voltage requirements of electronic devices. Batteries release heat during operation, and improving heat dissipation and charge / discharge performance within battery modules has long been a research priority in the industry.

[0004] Summary of the Invention

[0005] The present application provides a battery pack that can enhance the heat dissipation efficiency of the battery module and improve the cycle performance of the battery module.

[0006] In a first aspect, embodiments of the present application provide a battery pack comprising a first housing, a battery module, and a second housing. The first housing has a first opening. The battery module is housed within the first housing. The second housing is connected to the first housing, and the second housing comprises a first sub-housing and a second sub-housing. The first sub-housing is connected to the first housing and covers at least a portion of the first opening. The second sub-housing is connected to the first housing, and the first sub-housing and / or the second sub-housing are configured to be openable.

[0007] At least one of the first and second sub-housings can be opened, allowing the interior of the first housing to communicate with the exterior of the battery pack through the first opening. Heat generated by the battery module can be dissipated to the exterior of the battery pack through the first opening, thereby improving the heat dissipation efficiency and cycle performance of the battery module. During use, if a battery module malfunctions, at least one of the first and second sub-housings can be opened to access the battery module through the first opening for maintenance. This saves maintenance time, simplifies the battery pack assembly and disassembly process, and improves efficiency.

[0008] In some embodiments, the battery module and the first sub-housing are arranged opposite each other along a first direction. When the first sub-housing is opened, heat generated by the battery module can be dissipated to the outside of the battery pack through the first opening, thereby improving the heat dissipation efficiency of the battery module and the cycle performance of the battery module.

[0009] In some embodiments, the battery pack further includes a control assembly housed in the first housing, the control assembly and the battery module being spaced apart along a second direction perpendicular to the first direction, and the control assembly and the second sub-housing being arranged opposite to each other along the first direction.

[0010] Setting the control component and the battery module apart can reduce heat transfer between the battery module and the control component, reduce the thermal impact between the battery module and the control component, and improve the cycle performance of the battery module and the performance of the control component.

[0011] In some embodiments, the first opening includes a first area and a second area, the first sub-housing covers at least a portion of the first area, and the second sub-housing covers at least a portion of the second area.

[0012] The second sub-housing can be opened, allowing heat generated by the control component to dissipate outside the battery pack through the second area, thereby improving the control component's heat dissipation efficiency and performance. During battery pack operation, if a control component malfunctions, the second sub-housing can be opened to access the control component through the second area, saving maintenance time, simplifying battery pack assembly and disassembly, and improving efficiency.

[0013] In some embodiments, the first housing includes a partition that separates the first opening into a first region and a second region. The partition can support the portion of the first housing surrounding the first opening, reduce deformation of the first opening, and improve the stability and safety of the battery pack.

[0014] In some embodiments, the control assembly includes a circuit board, a control component, and a heat conducting plate. The circuit board includes a first surface and a second surface disposed opposite each other along a third direction perpendicular to the first and second directions. The second surface is connected to the first housing, and the control component and the heat conducting plate are disposed on the first surface.

[0015] During the operation of the battery pack, the heat conducting plate can conduct the heat generated by the circuit board and the control components to dissipate the heat outward, thereby lowering the temperature of the circuit board and the control components and reducing the risk of failure of the circuit board and the control components.

[0016] In some embodiments, the control component includes a control chip. Along the first direction, the control chip is located between the battery module and the heat conducting plate, which is beneficial for improving heat dissipation of the battery pack.

[0017] In some embodiments, the heat conducting plate is higher than the control component in the third direction when viewed from the first direction. The heat conducting plate is higher than the control component in the third direction, which can increase the heat dissipation area of ​​the heat conducting plate and improve the heat dissipation efficiency of the heat conducting plate.

[0018] In some embodiments, the battery pack further includes a heat dissipation component disposed within the first housing, the heat dissipation component being opposed to at least a portion of the heat conducting plate along a first direction. The heat dissipation component can be used to dissipate heat from the heat conducting plate to the exterior of the battery pack. Aligning the heat dissipation component with at least a portion of the heat conducting plate can improve heat dissipation efficiency.

[0019] In some embodiments, the control component includes a capacitor, and the heat dissipation component is opposed to at least a portion of the capacitor along a first direction. The heat dissipation component can be used to dissipate heat from the capacitor to the exterior of the battery pack. Placing the heat dissipation component opposed to at least a portion of the capacitor can improve heat dissipation efficiency.

[0020] In some embodiments, the heat conducting plate includes a first heat conducting plate and a second heat conducting plate spaced apart along the second direction. When viewed from the third direction, the capacitor is located between the first heat conducting plate and the second heat conducting plate in the second direction.

[0021] The first and second heat conducting plates can block the capacitor from both sides to reduce heat dissipation from the capacitor and minimize the thermal impact of the capacitor on other components. Airflow passing between the first and second heat conducting plates can remove heat generated by the capacitor, lowering the capacitor's temperature and improving its performance.

[0022] In some embodiments, the control component includes a control chip. When viewed from a third direction, the second heat conducting plate is located between the control chip and the capacitor in the second direction. The second heat conducting plate can separate the control chip and the capacitor, reducing heat conducted from the capacitor to the control chip, lowering the temperature of the control chip and improving the performance and lifespan of the control chip.

[0023] In some embodiments, the second sub-housing is disposed opposite the heat dissipation component along a first direction. The second sub-housing is provided with a plurality of through-holes, at least some of which are opposite the heat dissipation component along the first direction. The heat dissipation component dissipates heat from the battery pack to the exterior of the battery pack through the plurality of through-holes, thereby improving heat dissipation efficiency.

[0024] In some embodiments, when viewed from the first direction, the battery module is higher than the heat conducting plate in the third direction.

[0025] In some embodiments, the battery pack further includes a convex wall disposed between the battery module and the control assembly. The convex wall can isolate heat generated by the control assembly, reduce the thermal impact on the battery module, lower the risk of thermal runaway of the battery module, and improve safety.

[0026] In some embodiments, the battery pack further includes a first component disposed in the first housing; the control assembly is connected to the first component via a cable. The control assembly can transmit a signal to the first component via the cable to enable the first component to perform a predetermined function.

[0027] In some embodiments, the second housing further includes a third sub-housing connected to the first sub-housing and the second sub-housing. In the first direction, the third sub-housing covers at least a portion of the first component. The third sub-housing can protect the first component, reducing the risk of damage to the first component when the battery pack is subjected to external impact.

[0028] In some embodiments, the first sub-shell is provided with a first mating portion, and the second sub-shell is provided with a second mating portion. The first mating portion is configured to be able to move from a first position of the second mating portion to a second position. The first mating portion is clamped to the second sub-shell in the first position, and the first mating portion is rotatably connected to the second sub-shell in the second position.

[0029] In some embodiments, the first position and the second position are arranged along the second direction. The first sub-housing includes a first portion, the second sub-housing includes a second portion, the first portion and the second portion are arranged along the second direction, and the first mating portion and the second mating portion are located between the first portion and the second portion in the second direction.

[0030] In some embodiments, the second housing further includes a third sub-housing, at least a portion of the third sub-housing is located between the first portion and the second portion and abuts against the first portion and the second portion.

[0031] In some embodiments, in the second direction, a first recess is provided on a surface of the first portion facing the second portion, and a second recess is provided on a surface of the second portion facing the first portion. A first buckle and a second buckle are respectively provided at both ends of the third sub-housing along the second direction, the first buckle being inserted into the first recess, and the second buckle being inserted into the second recess.

[0032] In some embodiments, the battery pack further includes a first plate, the first plate being located on a side of the first portion facing the first shell and connected to the first shell, the first plate covering at least a portion of the first opening. The first plate is provided with a second opening, and the first sub-shell includes a third latch, the third latch being provided on an end surface of the first portion facing the first shell and extending through the second opening. The third latch is engaged with the first plate when the first mating portion is in a first position, and is released from engagement with the first plate when the first mating portion is in a second position.

[0033] In some embodiments, the first plate has a third opening; the battery pack further includes a second component that passes through the third opening and is electrically connected to the battery module; and a third recess is defined on a side of the first portion facing the first plate, with at least a portion of the second component being received in the third recess.

[0034] In some embodiments, the first sub-housing includes a third portion connected to the first portion, the third portion being located between the first portion and the second portion in the second direction. The first matching portion is provided on the third portion.

[0035] In some embodiments, a first hole is defined on a side of the third portion facing the first housing, and a first protrusion is defined on the first plate for insertion into the first hole. The first hole includes a first hole portion and a second hole portion that are interconnected, and the second hole portion has a larger diameter than the first hole portion. The first protrusion is inserted into the first hole portion when the first mating portion is in the first position, and is inserted into the second hole portion when the first mating portion is in the second position.

[0036] In some embodiments, the third portion is provided with a second hole. The battery pack further includes a first component, the second housing includes a third sub-housing, the first component is at least partially accommodated in the second hole, and at least a portion of the third sub-housing is located between the first portion and the second portion and covers at least a portion of the first component.

[0037] In some embodiments, the first component includes a display screen.

[0038] In some embodiments, the second sub-housing includes a second protrusion that protrudes from a surface of the second portion facing the first portion along the second direction, and the second mating portion is disposed on the second protrusion. The first sub-housing also includes a fourth portion that is connected to the first portion and disposed opposite the second protrusion along a third direction that is perpendicular to the second direction. The first mating portion protrudes from a surface of the fourth portion facing the second protrusion along the third direction and is inserted into the second mating portion.

[0039] In some embodiments, the second mating portion includes a third hole; a dimension of the third hole along a third direction at the second position is greater than a dimension of the third hole along the third direction at the first position, and the third direction is perpendicular to the second direction and the third direction.

[0040] In some embodiments, there are two second protrusions and two fourth portions, the two second protrusions are spaced apart along the third direction, and the two fourth portions are located between the two second protrusions.

[0041] In some embodiments, the second portion covers at least a portion of the first opening.

[0042] In some embodiments, the battery pack further comprises a second plate, the second plate being located on a side of the second portion facing the first shell and connected to the first shell, the second plate covering at least a portion of the first opening. The second plate and the second portion are arranged along a third direction. The second plate is provided with a fourth opening, and the second sub-shell comprises a fourth latch, the fourth latch being located on an end surface of the second portion facing the first shell, the fourth latch passing through the fourth opening. The fourth latch is engaged with the second plate when the first mating portion is in the first position, and is released from engagement with the second plate when the first mating portion is in the second position.

[0043] In some embodiments, the battery pack further includes a heat dissipation component, at least a portion of which is accommodated in the first housing. The second plate is provided with a fifth opening, the heat dissipation component is opposite to the fifth opening along the third direction, and the second portion covers the fifth opening. BRIEF DESCRIPTION OF THE DRAWINGS

[0044] The features, advantages and technical effects of exemplary embodiments of the present application will be described below with reference to the accompanying drawings.

[0045] FIG1 is a schematic structural diagram of a battery pack provided in one embodiment of the present application;

[0046] FIG2 is another schematic diagram of the structure of the battery pack shown in FIG1 , wherein the cover plate is omitted;

[0047] FIG3 is a schematic top view of the battery pack shown in FIG2 ;

[0048] FIG4 is a schematic diagram of an explosion of the battery pack shown in FIG2 ;

[0049] FIG5 is an enlarged schematic diagram of FIG2 at block A;

[0050] FIG6 is a schematic cross-sectional view of a battery pack provided in one embodiment of the present application;

[0051] FIG7 is a schematic structural diagram of the battery pack shown in FIG2 when the first sub-housing is opened;

[0052] FIG8 is a schematic structural diagram of the battery pack shown in FIG2 with the second sub-housing opened;

[0053] FIG9 is a schematic structural diagram of the second housing shown in FIG2 ;

[0054] FIG10 is an exploded schematic diagram of the second housing shown in FIG9 ;

[0055] FIG11 is a schematic diagram of the first sub-housing and the second sub-housing shown in FIG10 at another angle;

[0056] FIG12 is an enlarged schematic diagram of FIG11 at the circle B;

[0057] FIG13 is a schematic structural diagram of a first plate of a battery pack provided in one embodiment of the present application;

[0058] FIG14 is an enlarged schematic diagram of FIG11 at the circle C;

[0059] FIG15 is a schematic structural diagram of the first sub-housing shown in FIG11 ;

[0060] FIG16 is a schematic structural diagram of the second sub-housing shown in FIG11 ;

[0061] FIG17 is a schematic structural diagram of a second plate of a battery pack provided in one embodiment of the present application;

[0062] FIG18 is another schematic diagram of the first sub-housing and the second sub-housing shown in FIG11 ;

[0063] FIG19 is an exploded schematic diagram of a battery pack provided in another embodiment of the present application.

[0064] In the drawings, the drawings are not drawn to scale.

[0065] 1. First housing; 11. First opening; 111. First region; 112. Second region; 12. First wall; 13. Housing opening; 14. Partition; 15. Second wall; 16. Third wall; 17. Fourth wall; 18. Fifth wall; 2. Battery module; 3. Second housing;

[0066] 31. First sub-housing; 311. First mating portion; 312. First portion; 312a. First recess; 312b. Third recess; 313. Third buckle; 314. Third portion; 3141. First hole; 3141a. First hole portion; 3141b. Second hole portion; 3142. Second hole; 315. Fourth portion; 32. Second sub-housing; 321. Second mating portion; 321a. Third hole; 322. Second portion; 322a. Second recess; 323. Second protrusion; 324. Fourth buckle; 325. Through hole;

[0067] 33. Third sub-housing; 331. First buckle; 332. Second buckle;

[0068] 4. First plate; 41. Second opening; 42. Third opening; 43. First protrusion;

[0069] 5. Second component; 6. First component; 7. Second plate; 71. Fourth opening; 72. Fifth opening; 8. Heat dissipation component; 9. Control assembly; 91. Convex wall; 92. Circuit board; 921. First surface; 922. Second surface; 93. Control component; 931. Capacitor; 932. Inductor; 933. Control chip; 94. Heat conduction plate; 94a. First heat conduction plate; 94b. Second heat conduction plate; 94c. Third heat conduction plate; 95. Thermal adhesive;

[0070] Z, first direction; X, second direction; Y, third direction. DETAILED DESCRIPTION

[0071] In order to make the purpose, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly described below in combination with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments.

[0072] The terms "first," "second," and the like in the specification and claims of this application or the accompanying drawings are used to distinguish between different objects, rather than to describe a specific order or a primary-secondary relationship. In the embodiments of this application, the same reference numerals represent the same components, and for the sake of brevity, detailed descriptions of the same components in different embodiments are omitted.

[0073] References to "embodiments" in this application mean that a particular feature, structure, or characteristic described in connection with the embodiment may be included in at least one embodiment of the application. The appearance of this phrase in various places in the specification does not necessarily refer to the same embodiment, nor does it constitute an independent or alternative embodiment that is mutually exclusive of other embodiments.

[0074] In the description of this application, it should be noted that, unless otherwise specified or limited, the terms "mounted" and "connected" should be understood broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to direct connections, indirect connections through an intermediate medium, or internal connections between two components. Those skilled in the art will understand the specific meanings of the above terms in this application based on specific circumstances.

[0075] In the embodiments of this application, "parallel" includes not only absolute parallelism but also approximately parallelism as commonly understood in engineering practice. Similarly, "perpendicular" also includes not only absolute perpendicularity but also approximately perpendicularity as commonly understood in engineering practice. For example, if the angle between two directions is 80°-90°, they are considered perpendicular; if the angle between two directions is 0°-10°, they are considered parallel.

[0076] The battery module of the present application is described below with reference to the accompanying drawings.

[0077] As shown in Figures 1 to 8, the battery pack of an embodiment of the present application includes a first housing 1, a battery module 2, and a second housing 3. The first housing 1 has a first opening 11. The battery module 2 is accommodated in the first housing 1. The second housing 3 is connected to the first housing 1 and includes a first sub-housing 31 and a second sub-housing 32. The first sub-housing 31 is connected to the first housing 1 and covers at least a portion of the first opening 11. The second sub-housing 32 is connected to the first housing 1. The first sub-housing 31 and / or the second sub-housing 32 are configured to be openable.

[0078] In some embodiments, at least one of the first sub-housing 31 and the second sub-housing 32 can be opened, allowing the interior space of the first housing 1 to communicate with the space outside the battery pack via the first opening 11. Heat generated by the battery module 2 can be dissipated to the outside of the battery pack through the first opening 11, thereby improving the heat dissipation efficiency of the battery module 2 and the cycle performance of the battery module 2. During use of the battery pack, if a battery module 2 malfunctions, at least one of the first sub-housing 31 and the second sub-housing 32 can be opened to perform maintenance on the battery module 2 through the first opening 11. This can save maintenance time, simplify the battery pack assembly and disassembly process, and improve efficiency.

[0079] In some embodiments, the first sub-housing 31 is configured to be openable.

[0080] In some embodiments, the second sub-housing 32 covers at least a portion of the first opening 11 , and the second sub-housing 32 is configured to be openable.

[0081] In some embodiments, there may be one or more battery modules 2. Alternatively, there may be multiple battery modules 2.

[0082] The battery module 2 includes a plurality of battery cells, which can be connected in series, in parallel or in mixed connection. Mixed connection means that the plurality of battery cells are connected in both series and in parallel.

[0083] The battery cell may be a lithium-ion battery cell, a sodium-lithium-ion battery cell, a sodium-ion battery cell, a magnesium-ion battery cell or other types of battery cells, which are not limited in the present embodiment. Optionally, the battery cell is a soft-pack battery cell.

[0084] In some embodiments, the first housing 1 includes a first wall 12, a second wall 15, a third wall 16, a fourth wall 17, and a fifth wall 18. The first wall 12, the second wall 15, the third wall 16, and the fourth wall 17 enclose a first opening 11. The fifth wall 18 is opposite the first opening 11 in a first direction Z. The third wall 16 and the fourth wall 17 are arranged opposite each other along a second direction X, and the first wall 12 and the second wall 15 are arranged opposite each other along a third direction Y. Exemplarily, the first direction Z, the second direction X, and the third direction Y are perpendicular to each other.

[0085] In some embodiments, the second wall 15 , the third wall 16 , and the fourth wall 17 are connected to form a U-shaped frame structure. The frame structure defines a housing opening 13 opposite the second wall 15 in the third direction Y. The first wall 12 covers the housing opening 13 .

[0086] In some embodiments, the battery pack further includes a first plate 4 and a second plate 7. The first plate 4 is connected to the first wall 12, the second wall 15, and the third wall 16, and covers a portion of the first opening 11. The second plate 7 is connected to the first wall 12, the second wall 15, and the fourth wall 17, and is spaced apart from the first plate 4 and covers a portion of the first opening 11.

[0087] In some embodiments, the first wall 12 may be connected to the frame structure by bonding, clamping, welding or other methods to cover the housing opening 13 .

[0088] In some embodiments, the battery module 2 is disposed on the second wall 15. For example, the battery module 2 is bonded to the surface of the second wall 15 opposite to the housing opening 13 by glue.

[0089] In some embodiments, the first sub-housing 31 is connected to the first plate 4 .

[0090] In some embodiments, the first sub-housing 31 covers a portion of the first opening 11 .

[0091] In some embodiments, the battery module 2 and the first sub-housing 31 are arranged opposite to each other along the first direction Z. When the first sub-housing 31 is opened, the heat generated by the battery module 2 can be dissipated to the outside of the battery pack through the first opening 11, thereby improving the heat dissipation efficiency of the battery module 2 and the cycle performance of the battery module 2.

[0092] In some embodiments, the battery pack further includes a control assembly 9 housed in the first housing 1 , the control assembly 9 and the battery module 2 are spaced apart along a second direction X perpendicular to the first direction Z. The control assembly 9 and the second sub-housing 32 are disposed opposite each other along the first direction Z.

[0093] In some embodiments, the control assembly 9 is disposed on the second wall 15 , for example, fixed to the second wall 15 by screws or other fixing members.

[0094] When viewed along the first direction Z, the battery module 2 overlaps with the first sub-housing 31 , and the control assembly 9 overlaps with the second sub-housing 32 .

[0095] Setting the control component 9 and the battery module 2 apart can reduce heat transfer between the battery module 2 and the control component 9, reduce the thermal impact between the battery module 2 and the control component 9, and improve the cycle performance of the battery module 2 and the performance of the control component 9.

[0096] In some embodiments, the first opening 11 includes a first area 111 and a second area 112. The first sub-housing 31 covers at least a portion of the first area 111, and the second sub-housing 32 covers at least a portion of the second area 112. Exemplarily, the second sub-housing 32 is configured to be openable.

[0097] The first area 111 and the second area 112 may be connected or separated.

[0098] The second sub-housing 32 can be opened, allowing heat generated by the control assembly 9 to dissipate to the exterior of the battery pack through the second region 112, thereby improving the heat dissipation efficiency of the control assembly 9 and enhancing its performance. During use of the battery pack, if the control assembly 9 malfunctions, the second sub-housing 32 can be opened to allow maintenance of the control assembly 9 through the second region 112, saving maintenance time, simplifying the battery pack assembly and disassembly process, and improving efficiency.

[0099] In some embodiments, the battery module 2 and the control assembly 9 overlap when viewed from the second direction X. This embodiment can utilize space to reduce the distance between the battery module 2 and the control assembly 9, facilitating wiring harness connection.

[0100] In some embodiments, the battery module 2 is closer to the fifth wall 18 than the control assembly 9 in the first direction Z. The space between the fifth wall 18 and the control assembly 9 helps improve heat dissipation, facilitates wiring harness layout, reduces interference between wiring harnesses, and reduces the probability of wiring harness failure.

[0101] In some embodiments, the control assembly 9 is electrically connected to the battery module 2 to control the charging and discharging of the battery module 2. The control assembly is fixed to the first housing 1. For example, the control assembly 9 is bonded to the second wall 15 of the first housing 1.

[0102] In some embodiments, the control assembly 9 includes a circuit board 92, a control component 93, and a heat conducting plate 94. The circuit board 92 includes a first surface 921 and a second surface 922 that are arranged opposite each other along a third direction Y. The third direction Y is perpendicular to the first direction Z and the second direction X. The second surface 922 is connected to the first housing 1, and the control component 93 and the heat conducting plate 94 are arranged on the first surface 921. The first surface 921 faces the first wall 12, and the second surface 922 faces away from the first wall 12.

[0103] During the operation of the battery pack, the heat conducting plate 94 can conduct the heat generated by the circuit board 92 and the heat generated by the control component 93 to dissipate heat outward, thereby lowering the temperature of the circuit board 92 and the control component 93 and reducing the risk of failure of the circuit board 92 and the control component 93.

[0104] In some embodiments, the heat conducting plate 94 comprises a material with good heat conductivity, such as a metal material, wherein the metal material may be copper, aluminum, steel or other materials. Optionally, the surface of the heat conducting plate 94 may be covered with an insulating material.

[0105] In some embodiments, the heat conductive plate 94 may be an aluminum plate.

[0106] In some embodiments, the control component 93 includes a control chip 933. The control chip 933 can be used to control the operating state of the battery module 2. For example, the control chip 933 can be used to control the charging and discharging of the battery module 2. In some embodiments, along the first direction Z, the control chip 933 is located between the battery module 2 and the heat conducting plate 94, which facilitates heat dissipation from the battery pack.

[0107] Exemplarily, the circuit board 92 is a plate-shaped structure, and the first surface 921 and the second surface 922 are planes.

[0108] In some embodiments, the circuit board 92 includes a printed circuit board (PCB).

[0109] In some embodiments, the heat conducting plate 94 is higher than the control component 93 in the third direction Y when viewed from the first direction Z. The heat conducting plate 94 is higher than the control component 93 in the third direction Y, which can increase the heat dissipation area of ​​the heat conducting plate 94 and improve the heat dissipation efficiency of the heat conducting plate 94.

[0110] In some embodiments, the battery pack further includes a heat dissipation component 8 disposed on the first housing 1. The heat dissipation component 8 is opposed to at least a portion of the heat conducting plate 94 along the first direction Z. The heat dissipation component 8 is disposed on the fifth wall 18 and is fixed to the fifth wall 18, for example, by screws or other fasteners. Along the first direction Z, the projections of the heat dissipation component 8 and the second sub-housing 32 overlap, which helps improve heat dissipation of the battery pack. The heat dissipation component 8 can be used to dissipate heat from the heat conducting plate 94 to the outside of the battery pack. Placing the heat dissipation component 8 opposite to at least a portion of the heat conducting plate 94 can improve heat dissipation efficiency.

[0111] In some embodiments, the control chip 933 can be used to control the start and stop of the heat dissipation component 8.

[0112] In some embodiments, the heat dissipation component 8 may be mounted on the second plate 7 .

[0113] In some embodiments, the heat dissipation component 8 includes but is not limited to a fan or an air conditioner, and the heat dissipation component 8 has a heat dissipation function.

[0114] In some embodiments, the heat dissipation component 8 includes two fans, which are mounted on the first housing 1 and located on either side of the control assembly 9 along the first direction Z. During use of the battery pack, one fan draws air into the first housing 1 and the other fan exhausts air out of the first housing 1. The two fans direct airflow through the heat conducting plate 94 of the control assembly 9 to dissipate heat from the heat conducting plate 94 to the outside of the first housing 1.

[0115] In some embodiments, the control component 93 includes a capacitor 931, and the heat dissipation component 8 is opposite to at least a portion of the capacitor 931 along the first direction Z. The capacitor 931 may be one or more. For example, the capacitor 931 can store energy and provide output energy. Optionally, the capacitor 931 can also filter out interference and reduce loop current ripple.

[0116] The heat dissipation component 8 can be used to dissipate the heat on the capacitor 931 to the outside of the battery pack. The heat dissipation component 8 is opposite to at least part of the capacitor 931 to improve the heat dissipation efficiency.

[0117] In some embodiments, the heat conducting plate 94 includes a first heat conducting plate 94 a and a second heat conducting plate 94 b spaced apart along the second direction X. When viewed from the third direction Y, the capacitor 931 is located between the first heat conducting plate 94 a and the second heat conducting plate 94 b in the second direction X.

[0118] The first and second heat conducting plates 94a, 94b can block capacitor 931 from both sides to reduce the diffusion of heat from capacitor 931 and reduce the thermal impact of capacitor 931 on other components. The airflow passing between the first and second heat conducting plates 94a, 94b can remove heat generated by capacitor 931, thereby reducing the temperature of capacitor 931 and improving its operating performance.

[0119] In some embodiments, the first heat conducting plate 94a is connected to the first wall 12 via thermal adhesive 95, and the second heat conducting plate 94b is connected to the first wall 12 via thermal adhesive 95. Heat from the first heat conducting plate 94a and the second heat conducting plate 94b can be dissipated outward through the first wall 12.

[0120] In some embodiments, the second sub-housing 32 is disposed opposite to the heat dissipation component 8 along the first direction Z. The second sub-housing 32 defines a plurality of through holes 325 , at least some of which are opposite to the heat dissipation component 8 along the first direction Z.

[0121] The heat dissipation component 8 dissipates the heat inside the battery pack to the outside of the battery pack through the multiple through holes 325 to improve the heat dissipation efficiency.

[0122] In some embodiments, the control component 93 further includes an inductor 932. Optionally, the inductor 932 is a power inductor.

[0123] In some embodiments, the heat dissipation component 8 is opposite to at least a portion of the inductor 932 along the first direction Z.

[0124] In some embodiments, the heat conducting plate 94 includes a third heat conducting plate 94c. The third heat conducting plate 94c is connected to the inductor 932. The third heat conducting plate 94c can absorb heat generated by the inductor 932 and dissipate the heat to the outside, thereby reducing the temperature of the inductor 932 and improving the performance of the inductor 932.

[0125] In some embodiments, the third heat conducting plate 94 c is connected to the first wall 12 via a heat conducting adhesive 95 .

[0126] In some embodiments, when viewed from the first direction Z, the battery module 2 is higher than the heat conducting plate 94 in the third direction Y.

[0127] In some embodiments, when viewed from the third direction Y, the second heat conducting plate 94 b is located between the control chip 933 and the capacitor 931 in the second direction X.

[0128] The second heat conducting plate 94 b can separate the control chip 933 and the capacitor 931 , thereby reducing the heat transferred from the capacitor 931 to the control chip 933 , lowering the temperature of the control chip 933 , and improving the performance and life of the control chip 933 .

[0129] In some embodiments, the battery pack further includes a convex wall 91 disposed between the battery module 2 and the control assembly 9. The convex wall 91 can isolate the heat generated by the control assembly 9, reduce the thermal impact on the battery module 2, lower the risk of thermal runaway of the battery module, and improve safety.

[0130] In some embodiments, the protruding wall 91 protrudes from the second wall 15 and is fixed to the second wall 15 .

[0131] In some embodiments, in the third direction Y, the height of the convex wall 91 is less than or equal to the height of the third wall 16 , and the height of the convex wall 91 is less than or equal to the height of the fourth wall 17 .

[0132] In some embodiments, the convex wall 91 and the second wall 15 are integrally formed, which helps to improve the structural strength of the first housing 1. In some embodiments, the convex wall 91 can be fixed to the second wall 15 by screws or other fixing members.

[0133] In some embodiments, multiple cables 96 are provided within the battery pack. A routing channel is provided between the control assembly 9 and the battery module 2 in the second direction X, and at least a portion of the cables 96 are disposed within the routing channel. Providing a routing channel between the control assembly 9 and the battery module 2 facilitates the unified installation and fixation of multiple cables 96 and increases the thermal insulation gap between the control assembly 9 and the battery module 2. Some cables 96 may be located between the control assembly 9 and the battery module 2 in the second direction X.

[0134] In some embodiments, the control assembly 9 and the battery module 2 may be electrically connected via at least one cable 96 .

[0135] In some embodiments, the battery pack further includes a first component 6 disposed in the first housing 1 ; the control assembly 9 is connected to the first component 6 via a cable 96 .

[0136] The first component 6 is a component of the battery pack used to implement a specific function. Exemplarily, the first component 6 includes a display screen.

[0137] The control component 9 can transmit a signal to the first component 6 through the cable 96 so that the first component 6 can perform a predetermined function.

[0138] In some embodiments, the second housing further includes a third sub-housing 33, which is connected to the first sub-housing 31 and the second sub-housing 32. In the first direction Z, the third sub-housing 33 covers at least a portion of the first component 6. The third sub-housing 33 can protect the first component 6, thereby reducing the risk of damage to the first component 6 when the battery pack is subjected to external impact.

[0139] As shown in Figures 3, 4 and 9-18, the first sub-shell 31 is provided with a first matching portion 311, and the second sub-shell 32 is provided with a second matching portion 321. The first matching portion 311 is configured to be able to move from the first position of the second matching portion 321 to the second position. The first matching portion 311 is clamped to the second sub-shell 32 in the first position, and the first matching portion 311 is rotatably connected to the second sub-shell 32 in the second position.

[0140] When the first sub-housing 31 needs to be opened, the first sub-housing 31 is moved so that the first engaging portion 311 of the first sub-housing 31 moves to the second position, and then the first sub-housing 31 is rotated to open the first sub-housing 31. When the first sub-housing 31 needs to be closed, the first sub-housing 31 is rotated to a predetermined angle and then moved from the second position to the first position so that the first engaging portion 311 engages with the second sub-housing 32.

[0141] When the second sub-housing 32 needs to be opened, the second sub-housing 32 can be moved and rotated accordingly, so that the first matching portion 311 moves from the first position of the second matching portion 321 to the second position.

[0142] In some embodiments, the first position and the second position are arranged along the second direction X. The first sub-housing 31 includes a first portion 312 , the second sub-housing 32 includes a second portion 322 , the first portion 312 and the second portion 322 are arranged along the second direction X, and the first mating portion 311 and the second mating portion 321 are located between the first portion 312 and the second portion 322 in the second direction X.

[0143] In some embodiments, the second housing 3 further includes a third sub-housing 33 , at least a portion of which is located between the first portion 312 and the second portion 322 and abuts against the first portion 312 and the second portion 322 .

[0144] The third sub-housing 33 can limit the relative movement of the first portion 312 and the second portion 322 in the second direction X, so that the first matching portion 311 remains in the first position of the second matching portion 321 , thereby achieving fixation between the first sub-housing 31 and the second sub-housing 32 .

[0145] In some embodiments, in the second direction X, a first recess 312a is defined on the surface of the first portion 312 facing the second portion 322, and a second recess 322a is defined on the surface of the second portion 322 facing the first portion 312. A first latch 331 and a second latch 332 are respectively defined at both ends of the third sub-housing 33 along the second direction X. The first latch 331 is inserted into the first recess 312a, and the second latch 332 is inserted into the second recess 322a.

[0146] The third sub-housing 33 is respectively engaged with the first portion 312 and the second portion 322 via the first buckle 331 and the second buckle 332 , so as to fix the first sub-housing 31 , the second sub-housing 32 and the third sub-housing 33 .

[0147] In some embodiments, the battery pack further includes a first plate 4, which is located on the side of the first portion 312 facing the first housing 1 and is connected to the first housing 1. The first plate 4 covers at least a portion of the first opening 11. The first plate 4 has a second opening 41. The first sub-housing 31 includes a third latch 313, which is located on the end surface of the first portion 312 facing the first housing 1 and passes through the second opening 41. The third latch 313 is engaged with the first plate 4 when the first mating portion 311 is in the first position. The third latch 313 is released from the first plate 4 when the first mating portion 311 is in the second position.

[0148] The first plate 4 is fixed to the first housing 1. For example, the first plate 4 can be fixed to the first housing 1 by fasteners, such as screws.

[0149] The first sub-housing 31 is engaged with the first plate 4 by the third buckle 313 and the second opening 41 , so as to reduce the risk of the first sub-housing 31 rotating when the first engaging portion 311 is in the first position.

[0150] In some embodiments, the first plate 4 is provided with a third opening 42. The battery pack further includes a second component 5, which passes through the third opening 42 and is electrically connected to the battery module 2. A third recess 312b is provided on the side of the first portion 312 facing the first plate 4, and at least a portion of the second component 5 is accommodated in the third recess 312b. By providing the third opening 42, the risk of the first plate 4 interfering with the second component 5 can be reduced. The third recess 312b can provide an accommodating space for the second component 5 and can provide protection for the second component 5 from the outside. For example, the second component 5 may include a power harness connected to the battery module 2.

[0151] When the second component 5 fails, the first sub-housing 31 can be opened to perform maintenance on the second component 5 .

[0152] In some embodiments, two third openings 42 are provided, and the two third openings 42 are respectively opposite to the two battery modules 2 in the first direction Z. The second component 5 can pass through the two third openings 42 to electrically connect the two battery modules 2 .

[0153] In some embodiments, the first sub-housing 31 includes a third portion 314 connected to the first portion 312 , and the third portion 314 is located between the first portion 312 and the second portion 322 in the second direction X. The first matching portion 311 is provided on the third portion 314 .

[0154] In some embodiments, a first hole 3141 is provided on a side of the third portion 314 facing the first housing 1 , and a first protrusion 43 is provided on the first plate 4 to be inserted into the first hole 3141 . The first protrusion 43 is inserted into the first hole 3141 to limit movement of the first sub-housing 31 along the second direction X.

[0155] In some embodiments, the first hole 3141 includes a first hole portion 3141a and a second hole portion 3141b that are interconnected, and the diameter of the second hole portion 3141b is larger than the diameter of the first hole portion 3141a. The first protrusion 43 is inserted into the first hole portion 3141a when the first mating portion 311 is in the first position, and is inserted into the second hole portion 3141b when the first mating portion 311 is in the second position.

[0156] When the first mating portion 311 is in the first position, the first protrusion 43 engages with the first hole portion 3141a with a smaller aperture, so that the first protrusion 43 is engaged with the first sub-housing 31. When the first mating portion 311 is in the second position, the first protrusion 43 is inserted into the second hole portion 3141b. When the first sub-housing 31 is rotated toward the opening direction, the second hole portion 3141b with a larger aperture provides space for the rotation of the first protrusion 43 and is less likely to interfere with the rotation of the first protrusion 43. When the first sub-housing 31 is rotated toward the closing direction, the first protrusion 43 is more easily inserted into the second hole portion 3141b with a larger aperture.

[0157] In some embodiments, the third portion 314 is provided with a second hole 3142. The battery pack further includes a first component 6, and the second housing includes a third sub-housing 33. The first component 6 is at least partially accommodated in the second hole 3142. At least a portion of the third sub-housing 33 is located between the first portion 312 and the second portion 322 and covers at least a portion of the first component 6.

[0158] The second hole 3142 provides space for the first component 6, reducing the risk of interference between the first component 6 and the first sub-housing 31. The third sub-housing 33 covers at least a portion of the first component 6 to provide protection and reduce the risk of damage to the first component 6 when the battery pack is subjected to external impact.

[0159] In some embodiments, the first component 6 includes a display screen, and the third sub-housing 33 exposes a portion of the display screen to facilitate staff to observe the working status of the battery pack.

[0160] In some embodiments, the second sub-housing 32 includes a second protrusion 323 that protrudes from a surface of the second portion 322 facing the first portion 312 along the second direction X, and the second mating portion 321 is disposed on the second protrusion 323. The first sub-housing 31 also includes a fourth portion 315 that is connected to the first portion 312 and disposed opposite the second protrusion 323 along a third direction Y that is perpendicular to the second direction X. The first mating portion 311 protrudes from a surface of the fourth portion 315 that faces the second protrusion 323 along the third direction Y and is inserted into the second mating portion 321.

[0161] The second matching portion 321 can be a hole, a slot, a notch or other structures.

[0162] In some embodiments, the second matching portion 321 includes a third hole 321a. The third hole 321a has a larger dimension in the first direction Z at the second position than in the first position. The first direction Z is perpendicular to the second direction X and the third direction Y.

[0163] The third hole 321a has a smaller size along the first direction Z in the first position, and the first matching portion 311 can be engaged with the hole wall of the third hole 321a in the first position of the third hole 321a; the third hole 321a has a larger size along the first direction Z in the second position, and the first matching portion 311 can rotate in the second position of the third hole 321a.

[0164] In some embodiments, there are two second protrusions 323 and two fourth portions 315 , the two second protrusions 323 are spaced apart along the third direction Y, and the two fourth portions 315 are located between the two second protrusions 323 .

[0165] The second protrusion 323 is provided with a third hole 321a, and the two fourth portions 315 are provided with a first matching portion 311. The two first matching portions 311 cooperate with the two third holes 321a to improve the stability of the connection between the first sub-housing 31 and the second sub-housing 32.

[0166] In some embodiments, the second portion 322 covers at least a portion of the first opening 11. In some embodiments, in the first direction Z, the second portion 322 is opposite to at least a portion of the heat dissipation component 8.

[0167] In some embodiments, the battery pack further includes a second plate 7, which is located on a side of the second portion 322 facing the first shell 1 and is connected to the first shell 1. The second plate 7 covers at least a portion of the first opening 11. The second plate 7 and the second portion 322 are arranged along the first direction Z. The second plate 7 has a fourth opening 71, and the second sub-shell 32 includes a fourth latch 324. The fourth latch 324 is located on the end surface of the second portion 322 facing the first shell 1 and passes through the fourth opening 71. The fourth latch 324 is engaged with the second plate 7 when the first mating portion 311 is in the first position. The fourth latch 324 is released from the second plate 7 when the first mating portion 311 is in the second position.

[0168] The second plate 7 is fixed to the first housing 1. For example, the second plate 7 can be fixed to the first housing 1 by fasteners.

[0169] The second sub-housing 32 is engaged with the second plate 7 by the fourth buckle 324 and the fourth opening 71 , so as to reduce the risk of the second sub-housing 32 rotating when the first engaging portion 311 is in the first position.

[0170] In some embodiments, at least a portion of the heat dissipation component 8 is housed within the first housing 1. The second plate 7 defines a fifth opening 72. The heat dissipation component 8 opposes the fifth opening 72 along the first direction Z, and the second portion 322 covers the fifth opening 72. Driven by the heat dissipation component 8, gas outside the battery pack can enter the battery pack through the fifth opening 72, or gas inside the battery pack can be discharged to the outside of the battery pack through the fifth opening 72.

[0171] As shown in FIG. 19 , in some embodiments, the first housing includes a partition 14 , which separates the first opening 11 into a first area 111 and a second area 112 .

[0172] The partition 14 can support the portion of the first shell 1 surrounding the first opening 11 , reduce deformation of the first opening 11 , and improve the stability and safety of the battery pack.

Claims

1. A battery pack comprising: A first housing having a first opening; a battery module housed in the first housing; The second shell is connected to the first shell, and the second shell includes a first sub-shell and a second sub-shell, the first sub-shell is connected to the first shell and covers at least part of the first opening, the second sub-shell is connected to the first shell, and the first sub-shell and / or the second sub-shell are configured to be openable.

2. The battery pack according to claim 1, wherein: The battery module and the first sub-housing are arranged opposite to each other along a first direction; The battery pack further includes a control component housed in the first housing, the control component and the battery module being spaced apart along a second direction perpendicular to the first direction; The control assembly and the second sub-housing are arranged opposite to each other along the first direction.

3. The battery pack according to claim 1 or 2, wherein: The first opening includes a first area and a second area. The first sub-housing covers at least a portion of the first area, and the second sub-housing covers at least a portion of the second area.

4. The battery pack according to claim 3, wherein: The first housing includes a partition that separates the first opening into the first area and the second area.

5. The battery pack according to claim 2, wherein: The control assembly includes a circuit board, a control component, and a heat conducting plate, wherein the circuit board includes a first surface and a second surface arranged opposite to each other along a third direction, wherein the third direction is perpendicular to the first direction and the second direction; The second surface is connected to the first shell, and the control component and the heat conducting plate are arranged on the first surface.

6. The battery pack according to claim 5, wherein: The control component includes a control chip. Along the first direction, the control chip is located between the battery module and the heat conducting plate.

7. The battery pack according to claim 5, wherein: When viewed from the first direction, the heat conducting plate is higher than the control component in the third direction. 8 . The battery pack according to claim 5 , further comprising a heat dissipation component disposed on the first housing, wherein the heat dissipation component is opposite to at least a portion of the heat conducting plate along the first direction. 9 . The battery pack according to claim 8 , wherein the control component comprises a capacitor, and the heat dissipation component is opposite to at least a portion of the capacitor along the first direction.

10. The battery pack according to claim 9, wherein: The heat conducting plate comprises a first heat conducting plate and a second heat conducting plate spaced apart along the second direction; When viewed from the third direction, the capacitor is located between the first heat conducting plate and the second heat conducting plate in the second direction.

11. The battery pack according to claim 10, wherein: The control component includes a control chip; when viewed from the third direction, the second heat conducting plate is located between the control chip and the capacitor in the second direction.

12. The battery pack according to claim 8, wherein: The second sub-housing and the heat dissipation component are arranged opposite to each other along the first direction; The second sub-housing is provided with a plurality of through holes, and at least a portion of the plurality of through holes is opposite to the heat dissipation component along the first direction.

13. The battery pack according to claim 5, wherein: When viewed from the first direction, the battery module is higher than the heat conducting plate in the third direction. 14 . The battery pack according to claim 2 , further comprising a convex wall disposed between the battery module and the control assembly.

15. The battery pack according to claim 2, wherein: The battery pack further includes a first component disposed on the first shell; the control assembly is connected to the first component via a cable.

16. The battery pack according to claim 15, wherein: The second housing further includes a third sub-housing connected to the first sub-housing and the second sub-housing; In the first direction, the third sub-housing covers at least a portion of the first component.

17. The battery pack according to claim 1, wherein: The first sub-shell is provided with a first mating portion, and the second sub-shell is provided with a second mating portion. The first mating portion is configured to be able to move from a first position of the second mating portion to a second position. The first mating portion is clamped to the second sub-shell in the first position, and the first mating portion is rotatably connected to the second sub-shell in the second position.

18. The battery pack according to claim 17, wherein: The first position and the second position are arranged along a second direction; The first sub-housing includes a first portion, the second sub-housing includes a second portion, the first portion and the second portion are arranged along the second direction, and the first matching portion and the second matching portion are located between the first portion and the second portion in the second direction.

19. The battery pack according to claim 18, wherein: The second housing further includes a third sub-housing, at least a portion of which is located between the first portion and the second portion and abuts against the first portion and the second portion.

20. The battery pack according to claim 19, wherein: In the second direction, a first concave portion is provided on a surface of the first part facing the second part, and a second concave portion is provided on a surface of the second part facing the first part; The third sub-housing is provided with a first buckle and a second buckle at two ends along the second direction, respectively. The first buckle is inserted into the first recess, and the second buckle is inserted into the second recess.

21. The battery pack according to claim 18, further comprising a first plate, the first plate being located on a side of the first portion facing the first housing and connected to the first housing, the first plate covering at least a portion of the first opening; The first plate is provided with a second opening, the first sub-housing includes a third buckle, the third buckle is provided on the end surface of the first portion facing the first housing, and the third buckle passes through the second opening; The third buckle is engaged with the first plate when the first matching portion is located at the first position, and the third buckle is released from the first plate when the first matching portion is located at the second position.

22. The battery pack according to claim 21, wherein: The first plate is provided with a third opening; the battery pack further comprises a second component, the second component passing through the third opening and electrically connected to the battery module; A third recess is provided on a side of the first portion facing the first plate, and at least a portion of the second component is accommodated in the third recess.

23. The battery pack according to claim 21, wherein: The first sub-housing includes a third portion connected to the first portion, and the third portion is located between the first portion and the second portion in the second direction; The first matching portion is provided on the third portion.

24. The battery pack according to claim 23, wherein: A first hole is provided on a side of the third portion facing the first shell, and a first protrusion is provided on the first plate to be inserted into the first hole; The first hole includes a first hole portion and a second hole portion that are interconnected, and the aperture of the second hole portion is larger than the aperture of the first hole portion; The first protrusion is inserted into the first hole when the first fitting portion is located at the first position, and the first protrusion is inserted into the second hole when the first fitting portion is located at the second position.

25. The battery pack according to claim 23, wherein: The third portion is provided with a second hole; The battery pack further includes a first component, the second housing includes a third sub-housing, the first component is at least partially accommodated in the second hole, and at least a portion of the third sub-housing is located between the first portion and the second portion and covers at least a portion of the first component.

26. The battery pack according to claim 25, wherein: The first component includes a display screen.

27. The battery pack according to claim 18, wherein: The second sub-housing includes a second protrusion, the second protrusion protrudes from a surface of the second part facing the first part along the second direction, and the second matching portion is provided on the second protrusion; The first sub-housing further includes a fourth portion, the fourth portion being connected to the first portion and arranged opposite to the second protrusion along a third direction, the third direction being perpendicular to the second direction; The first matching portion protrudes from a surface of the fourth portion facing the second protrusion along the third direction and is inserted into the second matching portion.

28. The battery pack according to claim 27, wherein: The second matching portion includes a third hole; a size of the third hole in the second position along a third direction is larger than a size of the third hole in the first position along the third direction, and the third direction is perpendicular to the second direction and the third direction.

29. The battery pack according to claim 27, wherein: There are two of the second convex portions and two of the fourth portions. The two second convex portions are spaced apart along the third direction, and the two fourth portions are located between the two second convex portions.

30. The battery pack according to claim 18, wherein: The second portion covers at least a portion of the first opening.

31. The battery pack according to claim 30, further comprising a second plate, the second plate being located on a side of the second portion facing the first housing and connected to the first housing, the second plate covering at least a portion of the first opening; The second plate and the second portion are arranged along a third direction; The second plate is provided with a fourth opening, and the second sub-housing includes a fourth buckle, the fourth buckle is provided on the end surface of the second portion facing the first housing, and the fourth buckle passes through the fourth opening; The fourth buckle is engaged with the second plate when the first matching portion is located at the first position, and the fourth buckle is released from the second plate when the first matching portion is located at the second position.

32. The battery pack according to claim 31, further comprising a heat dissipation component, at least a portion of which is accommodated in the first housing; The second plate is provided with a fifth opening, the heat dissipation component is opposite to the fifth opening along the third direction, and the second portion covers the fifth opening.

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