Battery pack

Abstract

To provide a battery pack which improves the heat dissipation efficiency of a battery module and improves the cycle performance of the battery module. [Problem Solution] A battery pack includes a first case, a battery module, and a second case, wherein the first case has a first opening, the battery module is housed in the first case, the second case is connected to the first case, the second case includes a first sub-case and a second sub-case, the first sub-case is connected to the first case and covers at least a portion of the first opening, the second sub-case is connected to the first case, and the first sub-case and / or the second sub-case are configured to be openable.

Description

[Technical Field]

[0001] This application relates to the electrical field, and more particularly to battery packs. [Background technology]

[0002] A rechargeable cell is a battery that can be reused by activating the active material after the cell has been discharged and then recharged. Rechargeable cells are widely used in electronic devices such as mobile phones and laptops.

[0003] In order to meet the voltage requirements of electronic devices, a battery module usually includes a plurality of cells. Since a battery dissipates heat during operation, how to improve the heat dissipation of a battery module and improve the charge / discharge performance of the battery module has always been a research direction in the industry. Summary of the Invention

[0004] The battery pack provided in the present application can improve the heat dissipation efficiency of the battery module and improve the cycle performance of the battery module.

[0005] In a first aspect, an embodiment of the present application provides a battery pack including a first case, a battery module, and a second case. The first case has a first opening. The battery module is housed in the first case. The second case is connected to the first case, and the second case includes a first sub-case and a second sub-case, the first sub-case is connected to the first case and covers at least a portion of the first opening, and the second sub-case is connected to the first case, and the first sub-case and / or the second sub-case are configured to be openable.

[0006] At least one of the first sub-case and the second sub-case can be opened, allowing the interior space of the first case to communicate with the space outside the battery pack through the first opening. Heat generated by the battery module can be released to the outside of the battery pack through the first opening, improving the heat dissipation efficiency of the battery module and the cycle performance of the battery module. If a failure occurs in a battery module during use of the battery pack, at least one of the first sub-case and the second sub-case can be opened and maintenance can be performed on the battery module through the first opening. This saves maintenance time, simplifies the battery pack installation and removal process, and improves efficiency.

[0007] In some embodiments, the battery module is installed facing the first sub-case along the first direction, and when the first sub-case is opened, heat generated by the battery module is released 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.

[0008] In some embodiments, the battery pack further includes a control assembly housed in the first case, the control assembly being spaced apart from the battery module along a second direction perpendicular to the first direction, and the control assembly being opposite the second sub-case along the first direction.

[0009] By placing the control assembly at a distance from the battery module, heat transfer between the battery module and the control assembly can be reduced, the thermal influence between the battery module and the control assembly can be reduced, and the cycle performance of the battery module and the usage performance of the control assembly can be improved.

[0010] In some embodiments, the first opening includes a first region and a second region, the first sub-casing covering at least a portion of the first region, and the second sub-casing covering at least a portion of the second region.

[0011] The second sub-case can be opened to allow heat generated by the control assembly to be released to the outside of the battery pack through the second area, thereby improving the heat dissipation efficiency of the control assembly and improving its usability. If a fault occurs in the control assembly during battery pack use, the second sub-case can be opened and maintenance can be performed on the control assembly through the second area. This saves maintenance time, simplifies the battery pack installation and removal process, and improves efficiency.

[0012] In some embodiments, the first case includes a partition that divides the first opening into a first region and a second region. The partition supports a portion of the first case that surrounds the first opening, reduces deformation of the first opening, and improves the stability and safety of the battery pack.

[0013] In some embodiments, the control assembly includes a circuit board, a control component, and a thermally conductive plate, the circuit board having a first surface and a second surface disposed opposite each other along a third direction, the third direction being perpendicular to the first and second directions, the second surface being connected to the first case, and the control component and the thermally conductive plate being disposed on the first surface.

[0014] During the operation of the battery pack, the thermal conduction plate conducts heat generated by the circuit board and the control components, dissipates the heat to the outside, reduces the temperature of the circuit board and the control components, and reduces the risk of damage to the circuit board and the control components.

[0015] In some embodiments, the control component includes a control chip, and the control chip is located between the battery module and the thermally conductive plate along the first direction, which is advantageous for improving heat dissipation for the battery pack.

[0016] In some embodiments, when viewed from the first direction, the thermal conduction plate is higher than the control component in the third direction. By making the thermal conduction plate higher than the control component in the third direction, the heat dissipation area of ​​the thermal conduction plate can be increased, and the heat dissipation efficiency of the thermal conduction plate can be improved.

[0017] In some embodiments, the battery pack further includes a heat dissipation component disposed in the first case, the heat dissipation component facing at least a portion of the thermal conduction plate along the first direction. The heat dissipation component can dissipate heat from the thermal conduction plate to the outside of the battery pack. By facing the heat dissipation component to at least a portion of the thermal conduction plate, heat dissipation efficiency can be improved.

[0018] In some embodiments, the control component includes a capacitor, and the heat dissipation component faces at least a portion of the capacitor along the first direction. The heat dissipation component can dissipate heat in the capacitor to the outside of the battery pack. By facing the heat dissipation component to at least a portion of the capacitor, heat dissipation efficiency can be improved.

[0019] In some embodiments, the thermally conductive plates include a first thermally conductive plate and a second thermally conductive plate spaced apart along the second direction, and when viewed from the third direction, the capacitor is located between the first thermally conductive plate and the second thermally conductive plate in the second direction.

[0020] The first and second thermal conduction plates isolate the capacitor from both sides, reducing the diffusion of heat from the capacitor to the surrounding area and reducing the thermal impact of the capacitor on other components. The airflow passing between the first and second thermal conduction plates removes the heat from the capacitor, reducing the temperature of the capacitor and improving its operating performance.

[0021] In some embodiments, the control component includes a control chip. When viewed from the third direction, the second thermally conductive plate is located between the control chip and the capacitor in the second direction. The second thermally conductive plate can isolate the control chip from the capacitor, thereby reducing heat conduction from the capacitor to the control chip, lowering the temperature of the control chip, and improving the performance and lifespan of the control chip.

[0022] In some embodiments, the second sub-case is disposed facing the heat dissipation component along the first direction, and a plurality of through-holes are disposed in the second sub-case, at least some of which face the heat dissipation component along the first direction. The heat dissipation component dissipates heat from inside the battery pack to the outside of the battery pack through the through-holes, thereby improving heat dissipation efficiency.

[0023] In some embodiments, when viewed in the first direction, the battery module is higher than the thermally conductive plate in the third direction.

[0024] In some embodiments, the battery pack further includes a protrusion disposed between the battery module and the control assembly, which can insulate heat from the control assembly, reduce the thermal impact on the battery module, reduce the risk of thermal runaway of the battery module, and improve safety.

[0025] In some embodiments, the battery pack further includes a first component disposed in the first case, and the control assembly is connected to the first component by a cable, and the control assembly transmits signals to the first component via the cable to enable the first component to perform a desired function.

[0026] In some embodiments, the second case further includes a third sub-case, the third sub-case being connected to the first sub-case and the second sub-case. In the first direction, the third sub-case covers at least a portion of the first component. The third sub-case serves to protect the first component and can reduce the risk of damage to the first component when the battery pack is subjected to external impact.

[0027] In some embodiments, a first coupling portion is provided on the first sub-case and a second coupling portion is provided on the second sub-case, the first coupling portion is configured to be movable from a first position to a second position of the second coupling portion, the first coupling portion engages with the second sub-case in the first position, and the first coupling portion is rotatably connected to the second sub-case in the second position.

[0028] In some embodiments, the first location and the second location are located along the second direction, the first sub-case includes a first portion, the second sub-case includes a second portion, the first portion and the second portion are disposed along the second direction, and the first coupling portion and the second coupling portion are located between the first portion and the second portion in the second direction.

[0029] In some embodiments, the second case further includes a third sub-case, and at least a portion of the third sub-case is located between the first portion and the second portion and abuts the first portion and the second portion.

[0030] In some embodiments, a first recess is provided on a surface of the first part facing the second part in the second direction, and a second recess is provided on a surface of the second part facing the first part. A first engaging portion and a second engaging portion are provided on both ends of the third sub-case along the second direction, respectively, and the first engaging portion is inserted into the first recess, and the second engaging portion is inserted into the second recess.

[0031] In some embodiments, the battery pack further includes a first plate, the first plate being located on a side of the first part facing the first case and connected to the first case, the first plate covering at least a portion of the first opening. A second opening is provided in the first plate, and the first sub-case includes a third engagement portion, the third engagement portion being located on an end surface of the first part facing the first case and inserted into the second opening. When the first coupling portion is located in the first position, the third engagement portion engages with the first plate, and when the first coupling portion is located in the second position, the third engagement portion disengages from the first plate.

[0032] In some embodiments, the first plate has a third opening, the battery pack further includes a second component, the second component is inserted through the third opening and electrically connected to the battery module, and the first part has a third recess on a side facing the first plate, and at least a portion of the second component is housed in the third recess.

[0033] In some embodiments, the first sub-case 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, and the first coupling portion is located on the third portion.

[0034] In some embodiments, a first hole is provided on a side of the third part facing the first case, 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 communicate with each other, and the hole diameter of the second hole portion is larger than the hole diameter of the first hole portion. When the first coupling portion is located at the first position, the first protrusion is inserted into the first hole portion, and when the first coupling portion is located at the second position, the first protrusion is inserted into the second hole portion.

[0035] In some embodiments, the third portion has a second hole, the battery pack further includes a first component, the second case includes a third sub-case, at least a portion of the first component is housed in the second hole, and at least a portion of the third sub-case is located between the first and second components and covers at least a portion of the first component.

[0036] In some embodiments, the first component includes a display.

[0037] In some embodiments, the second subcase includes a second protrusion, the second protrusion protruding from a surface of the second part facing the first part along the second direction, and the second coupling part is mounted on the second protrusion. The first subcase further includes a fourth part, the fourth part connected to the first part and mounted opposite the second protrusion along a third direction, the third direction being perpendicular to the second direction. The first coupling part protruding from a surface of the fourth part facing the second protrusion along the third direction and inserted into the second coupling part.

[0038] In some embodiments, the second coupling portion includes a third hole, the size of the third hole at the second position along the third direction being greater than the size of the third hole at the first position along the third direction, and the third direction being perpendicular to the second direction and the first direction.

[0039] 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.

[0040] In some embodiments, the second portion covers at least a portion of the first opening.

[0041] In some embodiments, the battery pack further includes a second plate, the second plate being located on a side of the second portion facing the first case and connected to the first case, 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. A fourth opening is provided in the second plate, and the second sub-case includes a fourth engagement portion, the fourth engagement portion being located on an end surface of the second portion facing the first case and inserted into the fourth opening. When the first coupling portion is located in the first position, the fourth engagement portion engages with the second plate, and when the first coupling portion is located in the second position, the fourth engagement portion disengages from the second plate.

[0042] In some embodiments, the battery pack further includes a heat dissipation component, at least a portion of which is housed in the first case, and a fifth opening is provided in the second plate, the heat dissipation component faces the fifth opening along the third direction, and the second portion covers the fifth opening. [Brief explanation of the drawings]

[0043] The following describes the features, advantages and technical effects of exemplary embodiments of the present application with reference to the drawings. [Figure 1] FIG. 1 is a schematic diagram of the configuration of a battery pack provided in one embodiment of the present application. [Figure 2] FIG. 2 is another schematic diagram of the battery pack shown in FIG. 1, with the cover omitted. [Figure 3] FIG. 3 is a schematic plan view of the battery pack shown in FIG. [Figure 4] FIG. 4 is an exploded schematic view of the battery pack shown in FIG. [Figure 5] FIG. 5 is an enlarged schematic diagram of block A in FIG. [Figure 6] FIG. 6 is a schematic cross-sectional view of a battery pack provided in one embodiment of the present application. [Figure 7] FIG. 7 is a schematic diagram of the battery pack shown in FIG. 2 when the first sub-case is open. [Figure 8]FIG. 8 is a schematic diagram of the battery pack shown in FIG. 2 when the second sub-case is open. [Figure 9] FIG. 9 is a schematic diagram of the second case shown in FIG. [Figure 10] FIG. 10 is an exploded schematic view of the second case shown in FIG. [Figure 11] FIG. 11 is a schematic diagram of the first sub-case and the second sub-case shown in FIG. 10 viewed from another angle. [Figure 12] FIG. 12 is an enlarged schematic view of the circled frame B in FIG. [Figure 13] FIG. 13 is a schematic diagram of the first plate of a battery pack provided in one embodiment of the present application. [Figure 14] FIG. 14 is an enlarged schematic view of the circled frame C in FIG. [Figure 15] FIG. 15 is a schematic diagram of the configuration of the first sub-case shown in FIG. [Figure 16] FIG. 16 is a schematic diagram of the configuration of the second sub-case shown in FIG. [Figure 17] FIG. 17 is a schematic diagram of the second plate of the battery pack provided in one embodiment of the present application. [Figure 18] FIG. 18 is another schematic diagram of the first sub-case and the second sub-case shown in FIG. [Figure 19] FIG. 19 is an exploded schematic view of a battery pack provided in another embodiment of the present application.

[0044] In the drawings, the drawings are not drawn to scale.

[0045] 1: first case, 11: first opening, 111: first area, 112: second area, 12: first wall, 13: case opening, 14: partition, 15: second wall, 16: third wall, 17: fourth wall, 18: fifth wall, 2: battery module, 3: second case, 31: first sub-case, 311: first connecting portion, 312: first portion, 312a: first recess, 312b: third recess, 313: third engaging portion, 314: third portion, 3141: first hole, 3141a: first hole portion, 3141b: second hole portion, 3142: second hole, 315: fourth portion, 32: second sub-case, 321: second connecting portion, 321a: third hole, 322: second portion, 322a: second recess, 323: second protrusion, 324: fourth engaging portion, 325: through hole, 33: third sub-case, 331: first engagement portion, 332: second engagement portion, 4: first plate, 41: second opening, 42: third opening, 43: first protrusion, 5: second component, 6: first component, 7: second plate, 71: fourth opening, 72: fifth opening, 8: heat dissipation component, 9: control assembly, 91: protrusion, 92: circuit board, 921: first surface, 922: second surface, 93: control component, 931: capacitor, 932: inductor, 933: control chip, 94: thermally conductive plate, 94a: first thermally conductive plate, 94b: second thermally conductive plate, 94c: third thermally conductive plate, 95: thermally conductive paste, Z: 1st direction, X: 2nd direction, Y: 3rd direction. DETAILED DESCRIPTION OF THE INVENTION

[0046] In order to clarify the objectives, technical solutions and advantages of the embodiments of the present application, the following will provide a clear description of the technical solutions in the embodiments of the present application with reference to the drawings in the embodiments of the present application. Of course, the described embodiments are only some of the embodiments of the present application, and do not include all of the embodiments.

[0047] The terms "first," "second," etc. in the specification and claims of this application or in the drawings are used to distinguish between different objects and do not describe a particular order or priority. In the embodiments of this application, the same reference numerals represent the same parts, and for the sake of brevity, detailed descriptions of the same parts in different embodiments will be omitted.

[0048] The term "embodiment" as used herein means that a particular feature, structure, or characteristic described with reference to an embodiment may be included in at least one embodiment of the present application. Appearances of this phrase in various places in the specification do not necessarily refer to the same embodiment or to any other embodiment exclusively, singly, or as an alternative embodiment.

[0049] In the description of this application, unless otherwise clearly specified or limited, the terms "attached," "connected," etc. should be understood in a broad sense, and may refer to, for example, a fixed connection, a detachable connection, an integral connection, a direct connection, an indirect connection via an intermediate medium, or communication within two elements. Those skilled in the art may understand the specific meanings of the above terms in this application according to specific circumstances.

[0050] In the embodiments of the present application, "parallel" does not only include a completely parallel situation, but also includes an almost parallel situation that is generally accepted in engineering, and at the same time, "perpendicular" does not only include a completely perpendicular situation, but also includes an almost perpendicular situation that is generally accepted in engineering. For example, when the angle between two directions is 80° to 90°, the two directions may be considered to be perpendicular, and when the angle between two directions is 0° to 10°, the two directions may be considered to be parallel.

[0051] The battery module of the present invention will be described below with reference to the drawings.

[0052] As shown in FIGS. 1 to 8 , the battery pack of the present embodiment includes a first case 1, a battery module 2, and a second case 3. The first case 1 has a first opening 11. The battery module 2 is housed in the first case 1. The second case 3 is connected to the first case 1, and the second case 3 includes a first sub-case 31 and a second sub-case 32. The first sub-case 31 is connected to the first case 1 and covers at least a portion of the first opening 11. The second sub-case 32 is connected to the first case 1, and the first sub-case 31 and / or the second sub-case 32 are configured to be openable.

[0053] In some embodiments, at least one of the first sub-casing 31 and the second sub-casing 32 can be opened, allowing the interior space of the first case 1 to communicate with the space outside the battery pack through the first opening 11. Heat generated by the battery module 2 can be released 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. If a fault occurs in the battery module 2 during use of the battery pack, at least one of the first sub-casing 31 and the second sub-casing 32 can be opened to perform maintenance on the battery module 2 through the first opening 11. This saves maintenance time, simplifies the battery pack installation and removal process, and improves efficiency.

[0054] In some embodiments, the first sub-case 31 is configured to be openable.

[0055] In some embodiments, the second sub-casing 32 covers at least a portion of the first opening 11, and the second sub-casing 32 is configured to be openable.

[0056] In some embodiments, there may be one or more battery modules 2. Preferably, there are multiple battery modules 2.

[0057] The battery module 2 includes a plurality of cells, and the cells may be connected in series, in parallel, or in series-parallel. A series-parallel connection is understood to mean that the cells are connected in parallel while being connected in series.

[0058] The cells may be lithium ion cells, sodium lithium ion cells, sodium ion cells, magnesium ion cells, or other types of cells, and the present embodiments are not limited thereto. Preferably, the cells are soft pack cells.

[0059] In some embodiments, the first case 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 are surrounded by each other to form a first opening 11. The fifth wall 18 faces the first opening 11 in a first direction Z. The third wall 16 and the fourth wall 17 are disposed opposite each other along a second direction X, and the first wall 12 and the second wall 15 are disposed opposite each other along a third direction Y. Illustratively, the first direction Z, the second direction X, and the third direction Y are perpendicular to each other.

[0060] 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 case opening 13 facing the second wall 15 in the third direction Y. The first wall 12 is hooked to the case opening 13.

[0061] In some embodiments, the battery pack further includes a first plate 4 and a second plate 7, where the first plate 4 is connected to the first wall 12, the second wall 15, and the third wall 16, and the first plate 4 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 the second plate 7 is spaced apart from the first plate 4 and covers a portion of the first opening 11.

[0062] In some embodiments, first wall 12 is glued, mated, welded or otherwise connected to the frame structure and covers case opening 13 .

[0063] In some embodiments, the battery module 2 is installed on the second wall 15. Illustratively, the battery module 2 is adhered to the surface of the second wall 15 facing the case opening 13 with a paste.

[0064] In some embodiments, the first sub-casing 31 is connected to the first plate 4 .

[0065] In some embodiments, the first sub-casing 31 covers a portion of the first opening 11 .

[0066] In some embodiments, the battery module 2 is installed facing the first sub-case 31 along the first direction Z. When the first sub-case 31 is opened, heat generated by the battery module 2 is released 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.

[0067] In some embodiments, the battery pack further includes a control assembly 9 housed in the first case 1, and the control assembly 9 is disposed at a distance from the battery module 2 along a second direction X perpendicular to the first direction Z. The control assembly 9 is disposed opposite the second sub-case 32 along the first direction Z.

[0068] In some embodiments, the control assembly 9 is mounted to the second wall 15 and secured to the second wall 15 by fasteners such as screws.

[0069] When viewed along the first direction Z, there is an overlapping portion between the battery module 2 and the first sub-case 31, and there is an overlapping portion between the control assembly 9 and the second sub-case 32.

[0070] By placing the control assembly 9 at a distance from the battery module 2, heat transfer between the battery module 2 and the control assembly 9 can be reduced, the thermal influence between the battery module 2 and the control assembly 9 can be reduced, and the cycle performance of the battery module 2 and the usage performance of the control assembly 9 can be improved.

[0071] In some embodiments, the first opening 11 includes a first region 111 and a second region 112, with the first sub-casing 31 covering at least a portion of the first region 111 and the second sub-casing 32 covering at least a portion of the second region 112. Illustratively, the second sub-casing 32 is configured to be openable.

[0072] The first region 111 and the second region 112 may be connected to each other or may be separated from each other.

[0073] When the second sub-case 32 is opened, heat generated by the control assembly 9 is released to the outside of the battery pack through the second region 112, thereby improving the heat dissipation efficiency of the control assembly 9 and improving the usability of the control assembly 9. If a problem occurs in the control assembly 9 during use of the battery pack, the second sub-case 32 can be opened and maintenance can be performed on the control assembly 9 through the second region 112. This saves maintenance time, simplifies the battery pack installation and removal process, and improves efficiency.

[0074] In some embodiments, there is an overlap between the battery module 2 and the control assembly 9 when viewed in the second direction X. This embodiment utilizes the space to reduce the distance between the battery module 2 and the control assembly 9, making it easier to connect them using a harness.

[0075] In some embodiments, in the first direction Z, the battery module 2 is closer to the fifth wall 18 than the control assembly 9. The space between the fifth wall 18 and the control assembly 9 contributes to improved heat dissipation, is advantageous for harness placement, reduces interference between harnesses, and reduces the probability of harness failure.

[0076] 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 9 is fixed to the first case 1. Illustratively, the control assembly 9 is adhered to the second wall 15 of the first case 1.

[0077] In some embodiments, the control assembly 9 includes a circuit board 92, a control component 93, and a heat conduction 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, where 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 case 1, and the control component 93 and the heat conduction 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.

[0078] During the operation of the battery pack, the thermal conduction plate 94 conducts the heat generated by the circuit board 92 and the control components 93, dissipates the heat to the outside, reduces the temperature of the circuit board 92 and the control components 93, and reduces the risk of damage to the circuit board 92 and the control components 93.

[0079] In some embodiments, the heat conducting plate 94 includes a material with good thermal conductivity, such as a metal material, which may be copper, aluminum, steel, or other materials. Preferably, the surface of the heat conducting plate 94 may be covered with an insulating material.

[0080] In some embodiments, the heat conducting plate 94 may be an aluminum plate.

[0081] In some embodiments, the control component 93 includes a control chip 933. The control chip 933 can control the operating state of the battery module 2. For example, the control chip 933 can control the charging and discharging of the battery module 2. In some embodiments, the control chip 933 is located between the battery module 2 and the thermally conductive plate 94 along the first direction Z, which is beneficial to improving heat dissipation for the battery pack.

[0082] For example, the circuit board 92 has a plate-like structure, and the first surface 921 and the second surface 922 are flat surfaces.

[0083] In some embodiments, circuit board 92 includes a printed circuit board (PCB).

[0084] In some embodiments, when viewed from the first direction Z, the heat conduction plate 94 is higher in the third direction Y than the control component 93. By making the heat conduction plate 94 higher in the third direction Y than the control component 93, the heat dissipation area of ​​the heat conduction plate 94 can be increased and the heat dissipation efficiency of the heat conduction plate 94 can be improved.

[0085] In some embodiments, the battery pack further includes a heat dissipation component 8 installed in the first case 1, and the heat dissipation component 8 faces at least a portion of the heat conduction plate 94 along the first direction Z. The heat dissipation component 8 is installed in the fifth wall 18 and fixed to the fifth wall 18 with a fastener such as a screw. An overlapping portion between the projections of the heat dissipation component 8 and the second sub-case 32 along the first direction Z is advantageous for improving heat dissipation of the battery pack. The heat dissipation component 8 can dissipate heat from the heat conduction plate 94 to the outside of the battery pack. By facing at least a portion of the heat dissipation component 8 to the heat conduction plate 94, heat dissipation efficiency can be improved.

[0086] In some embodiments, the control chip 933 can control the activation and deactivation of the heat dissipation component 8 .

[0087] In some embodiments, the heat dissipation component 8 may be attached to the second plate 7 .

[0088] 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.

[0089] In some embodiments, the heat dissipation component 8 includes two fans attached to the first case 1, 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 case 1, and the other fan exhausts air to the outside of the first case 1. The two fans cause the airflow to pass through the thermal conduction plate 94 of the control assembly 9, thereby dissipating heat from the thermal conduction plate 94 to the outside of the first case 1.

[0090] In some embodiments, the control component 93 includes a capacitor 931, and the heat dissipation component 8 faces at least a portion of the capacitor 931 along the first direction Z. The capacitor 931 may be one or more. Illustratively, the capacitor 931 can store energy and provide output energy. Preferably, the capacitor 931 can also filter interference and reduce circuit current ripple.

[0091] Heat dissipation component 8 can dissipate heat from capacitor 931 to the outside of the battery pack. By placing heat dissipation component 8 opposite at least a part of capacitor 931, heat dissipation efficiency can be improved.

[0092] In some embodiments, the thermally conductive plate 94 includes a first thermally conductive plate 94a and a second thermally conductive plate 94b spaced apart along the second direction X. When viewed from the third direction Y, the capacitor 931 is located between the first thermally conductive plate 94a and the second thermally conductive plate 94b in the second direction X.

[0093] The first heat conduction plate 94a and the second heat conduction plate 94b insulate the capacitor 931 from both sides, reducing the diffusion of heat from the capacitor 931 to the surroundings and reducing the thermal impact of the capacitor 931 on other components. The airflow passing between the first heat conduction plate 94a and the second heat conduction plate 94b removes the heat from the capacitor 931, reducing the temperature of the capacitor 931 and improving the operating performance of the capacitor 931.

[0094] In some embodiments, the first thermally conductive plate 94a is connected to the first wall 12 by a thermally conductive paste 95, and the second thermally conductive plate 94b is connected to the first wall 12 by a thermally conductive paste 95. The heat in the first thermally conductive plate 94a and the heat in the second thermally conductive plate 94b can be dissipated to the outside through the first wall 12.

[0095] In some embodiments, the second sub-case 32 is disposed opposite the heat dissipation component 8 along the first direction Z. The second sub-case 32 has a plurality of through holes 325, at least some of which face the heat dissipation component 8 along the first direction Z.

[0096] The heat dissipation component 8 dissipates heat inside the battery pack to the outside of the battery pack through a plurality of through holes 325, thereby improving heat dissipation efficiency.

[0097] In some embodiments, the control component 93 further includes an inductor 932. Preferably, the inductor 932 is a power inductor.

[0098] In some embodiments, the heat dissipation component 8 faces at least a portion of the inductor 932 along the first direction Z.

[0099] In some embodiments, the thermally conductive plate 94 includes a third thermally conductive plate 94c. The third thermally conductive plate 94c is connected to the inductor 932. The third thermally conductive plate 94c absorbs heat generated by the inductor 932 and dissipates the heat to the outside, thereby reducing the temperature of the inductor 932 and improving the performance of the inductor 932.

[0100] In some embodiments, the third thermally conductive plate 94 c is connected to the first wall 12 by a thermally conductive paste 95 .

[0101] In some embodiments, when viewed in the first direction Z, the battery module 2 is higher in the third direction Y than the thermally conductive plate 94 .

[0102] In some embodiments, when viewed from the third direction Y, the second thermally conductive plate 94b is located between the control chip 933 and the capacitor 931 in the second direction X.

[0103] The second thermally conductive plate 94b can isolate the control chip 933 from the capacitor 931, thereby reducing the heat conducted from the capacitor 931 to the control chip 933, lowering the temperature of the control chip 933, and improving the performance and lifespan of the control chip 933.

[0104] In some embodiments, the battery pack further includes a protrusion 91, which is disposed between the battery module 2 and the control assembly 9. The protrusion 91 can insulate the heat from the control assembly 9, reduce the thermal impact on the battery module 2, reduce the risk of thermal runaway of the battery module, and improve safety.

[0105] In some embodiments, protrusion 91 protrudes from and is secured to second wall 15 .

[0106] In some embodiments, in the third direction Y, the height of the protrusion 91 is equal to or less than the height of the third wall 16 , and the height of the protrusion 91 is equal to or less than the height of the fourth wall 17 .

[0107] In some embodiments, the protrusion 91 and the second wall 15 are formed as a single piece, which is advantageous for improving the structural strength of the first case 1. In some embodiments, the protrusion 91 can be fixed to the second wall 15 by a fastener such as a screw.

[0108] In some embodiments, a plurality of cables 96 are installed in the battery pack. A wiring passage is pre-installed between the control assembly 9 and the battery modules 2 in the second direction X. At least some of the cables 96 are installed in the running passage. Installing a wiring passage between the control assembly 9 and the battery modules 2 not only facilitates the integrated installation and fixing of the plurality of cables 96, but also increases the insulating gap between the control assembly 9 and the battery modules 2. Some of the cables 96 can be located between the control assembly 9 and the battery modules 2 in the second direction X.

[0109] In some embodiments, the control assembly 9 and the battery module 2 may be electrically connected by a single cable 96 .

[0110] In some embodiments, the battery pack further includes a first component 6 mounted in the first case 1 , and the control assembly 9 is connected to the first component 6 by a cable 96 .

[0111] The first component 6 is a component for realizing a specific function of the battery pack, and illustratively includes a display.

[0112] The control assembly 9 transmits signals via cable 96 to the first component 6, enabling the first component 6 to perform the desired function.

[0113] In some embodiments, the second case further includes a third sub-case 33, which is connected to the first sub-case 31 and the second sub-case 32. In the first direction Z, the third sub-case 33 covers at least a portion of the first component 6. The third sub-case 33 serves to protect the first component 6 and can reduce the risk of damage to the first component when the battery pack 6 is subjected to an external impact.

[0114] As shown in Figures 3, 4 and 9 to 18, a first connecting portion 311 is installed on the first sub-case 31, and a second connecting portion 321 is installed on the second sub-case 32, and the first connecting portion 311 is configured to be movable from a first position of the second connecting portion 321 to a second position, and the first connecting portion 311 engages with the second sub-case 32 at the first position, and the first connecting portion 311 is rotatably connected to the second sub-case 32 at the second position.

[0115] When it is desired to open the first sub-case 31, the first sub-case 31 is moved, the first coupling portion 311 of the first sub-case 31 is moved to the second position, and then the first sub-case 31 is rotated to open the first sub-case 31. When it is desired to close the first sub-case 31, the first sub-case 31 is rotated to a preset angle and then moved from the second position to the first position to engage the first coupling portion 311 with the second sub-case 32.

[0116] When the second sub-case 32 is to be opened, the second sub-case 32 is moved and rotated accordingly, so that the first coupling part 311 moves from the first position of the second coupling part 321 to the second position.

[0117] In some embodiments, the first position and the second position are arranged along the second direction X. The first sub-case 31 includes a first portion 312, and the second sub-case 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 coupling portion 311 and the second coupling portion 321 are located between the first portion 312 and the second portion 322 in the second direction X.

[0118] In some embodiments, the second case 3 further includes a third sub-case 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.

[0119] The third sub-case 33 limits the relative movement of the first part 312 and the second part 322 in the second direction X, so that the first connecting part 311 is maintained in the first position of the second connecting part 321, thereby achieving fixation between the first sub-case 31 and the second sub-case 32.

[0120] In some embodiments, a first recess 312a is provided on a surface of the first part 312 facing the second part 322 in the second direction X, and a second recess 322a is provided on a surface of the second part 322 facing the first part 312. A first engagement part 331 and a second engagement part 332 are provided on both ends of the third sub-case 33 along the second direction X, respectively, and the first engagement part 331 is inserted into the first recess 312a and the second engagement part 332 is inserted into the second recess 322a.

[0121] The third sub-case 33 engages with the first part 312 and the second part 322 by the first engaging part 331 and the second engaging part 332, respectively, thereby realizing the fixing of the first sub-case 31, the second sub-case 32 and the third sub-case 33.

[0122] In some embodiments, the battery pack further includes a first plate 4, which is located on a side of the first portion 312 facing the first case 1 and is connected to the first case 1, and which covers at least a portion of the first opening 11. A second opening 41 is provided in the first plate 4, and the first sub-case 31 further includes a third engagement portion 313, which is provided on an end surface of the first portion 312 facing the first case 1 and which is inserted into the second opening 41. When the first coupling portion 311 is located in the first position, the third engagement portion 313 engages with the first plate 4, and when the first coupling portion 311 is located in the second position, the third engagement portion 313 disengages from the first plate 4.

[0123] The first plate 4 is fixed to the first case 1. For example, the first plate 4 can be fixed to the first case 1 by a fastener such as a screw.

[0124] The first sub-case 31 engages with the first plate 4 by fitting the third engagement portion 313 into the second opening 41, reducing the risk of the first sub-case 31 rotating when the first coupling portion 311 is in the first position.

[0125] In some embodiments, a third opening 42 is provided in the first plate 4. The battery pack further includes a second component 5, which is inserted through the third opening 42 and 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 housed in the third recess 312b. The provision of the third opening 42 can reduce the risk of the first plate 4 interfering with the second component 5. The third recess 312b can provide a storage space for the second component 5 and protect the second component 5 from the outside. For example, the second component 5 may include a power harness that connects the battery module 2.

[0126] If a failure occurs in the second component 5, the first sub-case 31 can be opened to perform maintenance on the second component 5.

[0127] In some embodiments, two third openings 42 are provided, and the two third openings 42 face two battery modules 2 respectively 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.

[0128] In some embodiments, the first sub-casing 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 coupling portion 311 is disposed on the third portion 314.

[0129] In some embodiments, a first hole 3141 is provided on the side of the third part 314 facing the first case 1, and a first protrusion 43 is provided on the first plate 4 and is inserted into the first hole 3141. The first protrusion 43 is inserted into the first hole 3141 and limits the movement of the first sub-case 31 along the second direction X.

[0130] In some embodiments, the first hole 3141 includes a first hole portion 3141a and a second hole portion 3141b that are in communication with each other, and the diameter of the second hole portion 3141b is larger than the diameter of the first hole portion 3141a. When the first coupling portion 311 is located at the first position, the first protrusion 43 is inserted into the first hole portion 3141a, and when the first coupling portion 311 is located at the second position, the first protrusion 43 is inserted into the second hole portion 3141b.

[0131] When the first coupling portion 311 is in the first position, the first protrusion 43 fits into the first hole 3141a, which has a smaller hole diameter, and thereby engages with the first sub-case 31. When the first coupling portion 311 is in the second position, the first protrusion 43 is inserted into the second hole 3141b. When the first sub-case 31 is rotated in the opening direction, the second hole 3141b, which has a larger hole diameter, 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-case 31 is rotated in the closing direction, the first protrusion 43 is more easily inserted into the second hole 3141b, which has a larger hole diameter.

[0132] In some embodiments, a second hole 3142 is provided in the third portion 314. The battery pack further includes a first component 6, and the second case includes a third sub-case 33, at least a portion of the first component 6 is housed in the second hole 3142, and at least a portion of the third sub-case 33 is located between the first portion 312 and the second portion 322 and covers at least a portion of the first component 6.

[0133] The second hole 3142 provides space for the first component 6, thereby reducing the risk of interference between the first component 6 and the first sub-case 31. The third sub-case 33 covers at least a portion of the first component 6 and plays a protective role, reducing the risk of damage to the first component 6 when the battery pack is subjected to external impact.

[0134] In some embodiments, the first part 6 includes a display. The third sub-casing 33 exposes a portion of the display to allow personnel to easily observe the operating status of the battery pack.

[0135] In some embodiments, the second sub-casing 32 includes a second protrusion 323 that protrudes from a surface of the second part 322 facing the first part 312 along the second direction X, and the second coupling part 321 is installed on the second protrusion 323. The first sub-casing 31 further includes a fourth part 315 that is connected to the first part 312 and faces the second protrusion 323 along the third direction Y, which is perpendicular to the second direction X. The first coupling part 311 protrudes from a surface of the fourth part 315 facing the second protrusion 323 along the third direction Y, and is inserted into the second coupling part 321.

[0136] The second coupling portion 321 may be a hole, a groove, a notch or other structure.

[0137] In some embodiments, the second coupling portion 321 includes a third hole 321a. The size of the third hole 321a at the second position along the first direction Z is larger than the size of the third hole 321a at the first position along the first direction Z, and the first direction Z is perpendicular to the second direction X and the third direction Y.

[0138] At the first position of the third hole 321a, the size along the first direction Z is small, and the first connecting portion 311 can engage with the hole wall of the third hole 321a at the first position of the third hole 321a, and at the second position of the third hole 321a, the size along the first direction Z is large, and the first connecting portion 311 can rotate at the second position of the third hole 321a.

[0139] 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.

[0140] A third hole 321a is provided in each of the second protrusions 323, and a first coupling portion 311 is provided in each of the two fourth portions 315. The two first coupling portions 311 are fitted into the two third holes 321a, thereby improving the stability of the connection between the first sub-case 31 and the second sub-case 32.

[0141] In some embodiments, the second portion 322 covers at least a part of the first opening 11. In some embodiments, the second portion 322 faces at least a part of the heat dissipation component 8 in the first direction Z.

[0142] 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 case 1 and is connected to the first case 1, and which 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. A fourth opening 71 is provided in the second plate 7, and the second sub-case 32 includes a fourth engagement portion 324, which is provided on an end surface of the second portion 322 facing the first case 1 and which is inserted into the fourth opening 71. When the first coupling portion 311 is located in the first position, the fourth engagement portion 324 engages with the second plate 7, and when the first coupling portion 311 is located in the second position, the fourth engagement portion 324 disengages from the second plate 7.

[0143] The second plate 7 is fixed to the first case 1. For example, the second plate 7 can be fixed to the first case 1 by a fastener.

[0144] The second sub-case 32 engages with the second plate 7 by fitting the fourth engagement portion 324 into the fourth opening 71, reducing the risk of the second sub-case 32 rotating when the first coupling portion 311 is in the first position.

[0145] In some embodiments, at least a portion of the heat dissipation component 8 is housed in the first case 1. A fifth opening 72 is provided in the second plate 7, the heat dissipation component 8 faces the fifth opening 72 along the first direction Z, and the second portion 322 covers the fifth opening 72. By incorporating the heat dissipation component 8, gas outside the battery pack can enter the inside of the battery pack through the fifth opening 72, or gas inside the battery pack can be exhausted to the outside of the battery pack through the fifth opening 72.

[0146] As shown in FIG. 19, in some embodiments, the first case includes a partition 14 that divides the first opening 11 into a first region 111 and a second region 112.

[0147] The partition 14 supports the portion 11 surrounding the first opening of the first case 1, reducing deformation of the first opening 11 and improving the stability and safety of the battery pack.

Claims

1. a first case having a first opening; a battery module housed in the first case; a second case connected to the first case and including a first sub-case and a second sub-case, the first sub-case being connected to the first case and covering at least a portion of the first opening, and the second sub-case being connected to the first case, the first sub-case and / or the second sub-case being configured to be opened; a first coupling portion is provided on the first sub-case and a second coupling portion is provided on the second sub-case, the first coupling portion is configured to be movable from a first position to a second position of the second coupling portion, the first coupling portion engages with the second sub-case at the first position, and the first coupling portion is rotatably connected to the second sub-case at the second position; Battery pack.

2. the battery module is installed facing the first sub-case along a first direction; the battery pack further includes a control assembly housed in the first case, the control assembly being spaced apart from the battery module along a second direction perpendicular to the first direction; the control assembly is disposed opposite the second sub-case along the first direction; The battery pack according to claim 1 .

3. the first opening includes a first region and a second region, the first sub-case covering at least a portion of the first region, and the second sub-case covering at least a portion of the second region; the first case includes a partition portion, and the partition portion divides the first opening into the first area and the second area; The battery pack according to claim 2 .

4. the control assembly includes a circuit board, a control component, and a thermally conductive plate, the circuit board having a first surface and a second surface disposed opposite each other along a third direction, the third direction being perpendicular to the first direction and the second direction; the second surface is connected to the first case, and the control component and the heat conduction plate are installed on the first surface; The battery pack according to claim 2 .

5. the battery pack further includes a first component installed in the first case, the control assembly being connected to the first component by a cable; the second case further includes a third sub-case, the third sub-case being connected to the first sub-case and the second sub-case; In the first direction, the third sub-case covers at least a portion of the first component. The battery pack according to claim 2 .

6. the first position and the second position are disposed along a second direction; the first sub-case includes a first portion, the second sub-case includes a second portion, the first portion and the second portion are arranged along the second direction, and the first coupling portion and the second coupling portion are located between the first portion and the second portion in the second direction; The battery pack according to claim 1 .

7. The second case further includes a third sub-case, and at least a portion of the third sub-case is located between the first portion and the second portion and abuts against the first portion and the second portion. The battery pack according to claim 6.

8. a first recess is provided on a surface of the first portion facing the second portion in the second direction, and a second recess is provided on a surface of the second portion facing the first portion; a first engaging portion and a second engaging portion are provided at both ends of the third sub-case along the second direction, respectively, the first engaging portion being inserted into the first recess, and the second engaging portion being inserted into the second recess; The battery pack according to claim 7.

9. a first plate located on a side of the first portion facing the first case and connected to the first case, the first plate covering at least a portion of the first opening; a second opening is provided in the first plate, the first sub-case includes a third engaging portion, the third engaging portion is provided on an end surface of the first portion facing the first case, and the third engaging portion is inserted into the second opening; When the first coupling portion is located at the first position, the third engagement portion engages with the first plate, and when the first coupling portion is located at the second position, the third engagement portion disengages from the first plate. The battery pack according to claim 6.

10. a third opening is provided on the first plate, the battery pack further includes a second component, the second component is inserted 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; The battery pack according to claim 9.

11. the first sub-case 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 coupling portion is disposed on the third portion; The battery pack according to claim 9.

12. a first hole is formed on a side of the third portion facing the first case, and a first protrusion to be inserted into the first hole is formed on the first plate; the first hole includes a first hole portion and a second hole portion that are in communication with each other, and the diameter of the second hole portion is larger than the diameter of the first hole portion; When the first coupling portion is located at the first position, the first convex portion is inserted into the first hole portion, and when the first coupling portion is located at the second position, the first convex portion is inserted into the second hole portion. The battery pack according to claim 11.

13. a second hole is provided in the third portion; the battery pack further includes a first component, the second case includes a third sub-case, at least a portion of the first component is housed in the second hole, and at least a portion of the third sub-case is located between the first portion and the second portion and covers at least a portion of the first component; the first component includes a display; The battery pack according to claim 12.

14. the second sub-case includes a second protrusion, the second protrusion protruding from a surface of the second part facing the first part along the second direction, and the second coupling part being installed on the second protrusion; the first sub-case further includes a fourth portion, the fourth portion is connected to the first portion and is disposed facing the second protrusion along a third direction, the third direction being perpendicular to the second direction; the first coupling portion protrudes from a surface of the fourth portion facing the second protrusion along the third direction and is inserted into the second coupling portion; The battery pack according to claim 6.

15. the second portion covers at least a portion of the first opening; the battery pack further includes a second plate, the second plate being located on a side of the second portion facing the first case and connected to the first case, the second plate covering at least a portion of the first opening; the second plate and the second portion are arranged along a first direction; a fourth opening is provided in the second plate, the second sub-case includes a fourth engaging portion, the fourth engaging portion is provided on an end surface of the second portion facing the first case, and the fourth engaging portion is inserted into the fourth opening; When the first coupling portion is located at the first position, the fourth engagement portion engages with the second plate, and when the first coupling portion is located at the second position, the fourth engagement portion disengages from the second plate. The battery pack according to claim 6.

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