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 field of electricity, and particularly to battery packs.

Background Art

[0002] A rechargeable cell is a battery in which the active material is activated by charging and reused after the cell is discharged. Rechargeable cells are widely applied to electronic devices such as mobile phones, laptop computers, etc.

[0003] In order to meet the requirements for the voltage of an electronic device, a battery module usually includes a plurality of cells. Since heat is released during the operation of the battery, how to improve the heat dissipation of the 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 this 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 this 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 part 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 opened.

[0006] By opening at least one of the first and second subcases, the internal space of the first case can communicate with the external space of the battery pack through the first opening. Heat from the battery module can be released to the outside of the battery pack through the first opening, thereby improving the heat dissipation efficiency of the battery module and improving its cycle performance. If a battery module fails during the use of the battery pack, maintenance can be performed on the battery module by opening at least one of the first and second subcases and accessing it 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 a first subcase along a first direction. When the first subcase is opened, heat from the battery module is released to the outside of the battery pack through a first opening, thereby improving the heat dissipation efficiency of the battery module and improving the cycle performance of the battery module.

[0008] In some embodiments, the battery pack further includes a control assembly housed in a first case, the control assembly spaced apart from the battery module along a second direction perpendicular to the first direction. The control assembly is positioned opposite a second subcase along the first direction.

[0009] By installing the control assembly at a distance from the battery module, heat transfer between the battery module and the control assembly can be reduced, decreasing the thermal impact between the battery module and the control assembly, thereby improving the cycle performance of the battery module and the operating performance of the control assembly.

[0010] In some embodiments, the first opening includes a first region and a second region, the first subcase covers at least a portion of the first region, and the second subcase covers at least a portion of the second region.

[0011] The second subcase can be opened, and heat generated by the control assembly can 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 operational performance. If a failure occurs in the control assembly during the use of the battery pack, the second subcase 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 the portion of the first case surrounding the first opening, reducing deformation of the first opening and improving the stability and safety of the battery pack.

[0013] In some embodiments, the control assembly includes a circuit board, control components, and a thermal conductive plate, the circuit board including a first and second surface facing each other along a third direction, the third direction being perpendicular to the first and second directions. The second surface is connected to a first case, and the control components and thermal conductive plate are mounted on the first surface.

[0014] During the operation of the battery pack, the heat conduction plate conducts heat from the circuit board and the control components, dissipating heat to the outside, lowering the temperature of the circuit board and control components, and reducing the risk of damage to the circuit board and control components.

[0015] 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 thermal conductive plate, which is advantageous for improving heat dissipation to the battery pack.

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

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

[0019] In some embodiments, the thermal conductive plate includes a first thermal conductive plate and a second thermal conductive plate spaced apart along a second direction. Viewed from a third direction, the capacitor is located between the first thermal conductive plate and the second thermal conductive plate in the second direction.

[0020] The first and second heat conduction plates isolate the capacitor from both sides, thereby reducing the diffusion of heat from the capacitor to the surroundings and decreasing the thermal impact of the capacitor on other components. The airflow passing between the first and second heat conduction plates removes heat from the capacitor, lowers the capacitor's temperature, and improves the capacitor's operating performance.

[0021] In some embodiments, the control component includes a control chip. Viewed from a third direction, the second thermal conductive plate is positioned between the control chip and the capacitor in the second direction. The second thermal conductive plate can isolate the control chip from the capacitor. This reduces the heat conducted from the capacitor to the control chip, lowers the temperature of the control chip, and improves the performance and lifespan of the control chip.

[0022] In some embodiments, the second subcase is positioned facing the heat dissipation component along the first direction. The second subcase is provided with multiple through-holes, at least a portion of which face the heat dissipation component along the first direction. The heat dissipation component releases heat from inside the battery pack to the outside through the multiple through-holes, improving heat dissipation efficiency.

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

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

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

[0026] In some embodiments, the second case further includes a third subcase, which is connected to the first and second subcases. In the first direction, the third subcase covers at least a portion of the first component. The third subcase serves to protect the first component, thereby reducing the risk of damage to the first component when the battery pack is subjected to external impact.

[0027] In some embodiments, a first coupling is provided on a first subcase, a second coupling is provided on a second subcase, the first coupling is configured to move from a first position to a second position of the second coupling, the first coupling engages with the second subcase in the first position, and the first coupling is rotatably connected to the second subcase in the second position.

[0028] In some embodiments, the first position and the second position are arranged along the second direction. The first sub-case includes a first part, the second sub-case includes a second part, the first part and the second part are arranged along the second direction, and the first coupling part and the second coupling part are located between the first part and the second part in the second direction.

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

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

[0031] In some embodiments, the battery pack further includes a first plate, the first plate is located on the side of the first part facing the first case, is connected to the first case, and the first plate covers at least a part of the first opening. A second opening is installed on the first plate, the first sub-case includes a third engaging part, the third engaging part is installed on the end surface of the first part facing the first case, and the third engaging part is inserted through the second opening. When the first coupling part is located at the first position, the third engaging part engages with the first plate, and when the first coupling part is located at the second position, the third engaging part releases the engagement with the first plate.

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

[0033] In some embodiments, the first sub-case includes a third part connected to the first part, the third part is located between the first part and the second part in the second direction. The first coupling part is installed on the third part.

[0034] In some embodiments, a first hole is provided on the side of the third portion facing the first case, and a first protrusion is provided on the first plate which is 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 diameter of the second hole portion is larger than the diameter of the first hole portion. When the first joint portion is in a first position, the first protrusion is inserted into the first hole portion, and when the first joint portion is in a second position, the first protrusion is inserted into the second hole portion.

[0035] In some embodiments, a second hole is provided in the third part. The battery pack further includes a first part, the second case includes a third subcase, at least a portion of the first part is housed in the second hole, and at least a portion of the third subcase is located between the first and second parts and covers at least a portion of the first part.

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

[0037] In some embodiments, the second subcase includes a second protrusion, which projects from a surface of the second portion facing the first portion along a second direction, and the second connector is positioned on the second protrusion. The first subcase further includes a fourth portion, which is connected to the first portion and positioned opposite the second protrusion along a third direction, the third direction being perpendicular to the second direction. The first connector projects from a surface of the fourth portion facing the second protrusion along a third direction and is inserted into the second connector.

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

[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 part of the first opening.

[0041] In some embodiments, the battery pack further includes a second plate, which is located on the side of the second part facing the first case and connected to the first case, and the second plate covers at least a portion of the first opening. The second plate and the second part are arranged along a third direction. A fourth opening is provided in the second plate, and the second sub-case includes a fourth engaging portion, which is located on the end face of the second part facing the first case and is inserted through the fourth opening. When the first coupling is in a first position, the fourth engaging portion engages with the second plate, and when the first coupling is in a second position, the fourth engaging 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 a first case. A fifth opening is provided in a second plate, and the heat dissipation component faces the fifth opening along a third direction, with the second portion covering the fifth opening. [Brief explanation of the drawing]

[0043] The features, advantages, and technical effects of exemplary embodiments of the present application will be described below with reference to the drawings. [Figure 1] Figure 1 is a schematic diagram of the configuration of a battery pack provided in one embodiment of the present invention. [Figure 2] Figure 2 is an alternative schematic diagram of the battery pack shown in Figure 1, with the cover omitted. [Figure 3] Figure 3 is a schematic plan view of the battery pack shown in Figure 2. [Figure 4] Figure 4 is a schematic diagram of the battery pack shown in Figure 2. [Figure 5] Figure 5 is an enlarged schematic diagram of block A in Figure 2. [Figure 6] Figure 6 is a schematic cross-sectional view of a battery pack provided in one embodiment of the present invention. [Figure 7] Figure 7 is a schematic diagram of the configuration when the first sub-case of the battery pack shown in Figure 2 is opened. [Figure 8]Figure 8 is a schematic diagram of the configuration when the second sub-case of the battery pack shown in Figure 2 is opened. [Figure 9] Figure 9 is a schematic diagram of the configuration of the second case shown in Figure 2. [Figure 10] Figure 10 is a schematic diagram of the second case shown in Figure 9. [Figure 11] Figure 11 is a schematic diagram showing the first and second subcases shown in Figure 10 from different angles. [Figure 12] Figure 12 is an enlarged schematic diagram of the circular frame B in Figure 11. [Figure 13] Figure 13 is a schematic diagram of the configuration of the first board of a battery pack provided in one embodiment of the present invention. [Figure 14] Figure 14 is an enlarged schematic diagram of the circular frame C in Figure 11. [Figure 15] Figure 15 is a schematic diagram of the configuration of the first subcase shown in Figure 11. [Figure 16] Figure 16 is a schematic diagram of the configuration of the second subcase shown in Figure 11. [Figure 17] Figure 17 is a schematic diagram of the configuration of the second board of a battery pack provided in one embodiment of the present invention. [Figure 18] Figure 18 is another schematic diagram of the first and second subcases shown in Figure 11. [Figure 19] Figure 19 is an exploded schematic diagram of a battery pack provided in another embodiment of the present invention.

[0044] In drawings, the drawings are not drawn to actual 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 subcase, 311: First joint, 312: First part, 312a: First recess, 312b: Third recess, 313: Third engaging part, 314: Third part, 3141: First hole, 3141a: First hole part, 3141b: Second hole part, 3142: Second hole, 315: Fourth part, 32: Second subcase, 321: Second joint, 321a: Third hole, 322: Second part, 322a: Second recess, 323: Second protrusion, 324: Fourth engaging part, 325: Through hole, 33: Third subcase, 331: First engaging part, 332: Second engaging part, 4: First plate, 41: Second opening, 42: Third opening, 43: First protrusion, 5: Second component, 6: First component, 7: Second board, 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: Thermal conductive plate, 94a: First thermal conductive plate, 94b: Second thermal conductive plate, 94c: Third thermal conductive plate, 95: Thermal conductive paste, Z: 1st direction, X: 2nd direction, Y: 3rd direction. [Modes for carrying out the invention]

[0046] To further clarify the purpose, technical proposal, and advantages of the embodiments of this application, the following will provide a clear explanation of the technical proposal in the embodiments of this application, with reference to the drawings. Of course, the embodiments described are only a selection of the embodiments of this application, not all of them.

[0047] The terms "First," "Second," etc., used in the specification and claims of this application or in the drawings above are intended to distinguish different subjects and do not indicate a specific 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 are omitted in different embodiments.

[0048] The meaning of “Examples” as used in this Application is that any particular feature, configuration, or characteristic described with reference to an Example may be included in at least one Example of this Application. The phrase “Examples” as used in this Application does not necessarily refer to the same Example, nor does it refer to an exclusive, sole, or alternative Example.

[0049] In this description, unless otherwise specifically defined or limited, terms such as "attachment," "connection," etc., should be understood in a broad sense. For example, a connection may be fixed, detachable, or integral; a direct connection may be made; an indirect connection may be made via an intermediate medium; or communication may occur within two elements. A person skilled in the art may understand the specific meaning of the above terms in this application depending on the specific circumstances.

[0050] In the embodiments of this application, "parallel" does not only include situations where the directions are perfectly parallel, but also situations where they are nearly parallel, which is generally accepted in engineering. Similarly, "perpendicular" does not only include situations where the directions are perfectly perpendicular, but also situations where they are nearly perpendicular, which is generally accepted in engineering. For example, if the angle between the two directions is between 80° and 90°, the two directions can be considered perpendicular, and if the angle between the two directions is between 0° and 10°, the two directions can be considered parallel.

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

[0052] As shown in Figures 1 to 8, the battery pack of this 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 includes a first subcase 31 and a second subcase 32, the first subcase 31 is connected to the first case 1 and covers at least a portion of the first opening 11, the second subcase 32 is connected to the first case 1 and the first subcase 31 and / or the second subcase 32 are configured to be opened.

[0053] In some embodiments, by opening at least one of the first subcase 31 and the second subcase 32, the internal space of the first case 1 can communicate with the external space of the battery pack through the first opening 11. Heat from 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 improving its cycle performance. If a failure occurs in the battery module 2 during the use of the battery pack, maintenance can be performed on the battery module 2 through the first opening 11 by opening at least one of the first subcase 31 and the second subcase 32. This saves maintenance time, simplifies the battery pack installation and removal process, and improves efficiency.

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

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

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

[0057] Battery module 2 contains multiple cells, which may be connected directly, in parallel, or in series-parallel. Series-parallel connection is understood to mean connecting multiple cells directly while also connecting them in parallel.

[0058] The cell may be a lithium-ion cell, a sodium-lithium-ion cell, a sodium-ion cell, a magnesium-ion cell, or other types of cells, and the embodiments of this application are not limited thereto. Preferably, the cell is a soft-pack cell.

[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 form a first opening 11. The fifth wall 18 faces the first opening 11 in the first direction Z. The third wall 16 and the fourth wall 17 are positioned facing each other X along the second direction, and the first wall 12 and the second wall 15 are positioned facing each other Y along the third direction. Exemplarily, 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 forms a case opening 13 facing the second wall 15 in the third direction Y. The first wall 12 is hooked onto the case opening 13.

[0061] In some embodiments, the battery pack further includes a first plate 4 and a second plate 7, the first plate 4 being connected to a first wall 12, a second wall 15, and a third wall 16, and the first plate 4 covering a portion of the first opening 11. The second plate 7 being connected to a first wall 12, a second wall 15, and a fourth wall 17, the second plate 7 being installed at a distance from the first plate 4, and covering a portion of the first opening 11.

[0062] In some embodiments, the first wall 12 is connected to the frame structure by adhesive, engagement, welding or other means, and covers the case opening 13.

[0063] In some embodiments, the battery module 2 is installed in the second wall 15. Exemplarily, the battery module 2 is bonded to the surface of the second wall 15 facing the case opening 13 by paste.

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

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

[0066] In some embodiments, the battery module 2 is installed facing the first subcase 31 along the first direction Z. When the first subcase 31 is opened, heat from 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 improving the cycle performance of the battery module 2.

[0067] In some embodiments, the battery pack further includes a control assembly 9 housed in a first case 1, which is spaced apart from the battery module 2 along a second direction X perpendicular to a first direction Z. The control assembly 9 is positioned opposite a second subcase 32 along the first direction Z.

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

[0069] Looking along the first direction Z, there is an overlapping portion between the battery module 2 and the first subcase 31, and an overlapping portion between the control assembly 9 and the second subcase 32.

[0070] By installing 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 impact between the battery module 2 and the control assembly 9 can be decreased, and the cycle performance of the battery module 2 and the operating 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, the first subcase 31 covers at least a portion of the first region 111, and the second subcase 32 covers at least a portion of the second region 112. Exemplarily, the second subcase 32 is configured to be opened.

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

[0073] The second subcase 32 can be opened, and the heat generated by the control assembly 9 can be 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 its operational performance. If a failure occurs in the control assembly 9 during the process of using the battery pack, the second subcase 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, when viewed in the second direction X, there is an overlapping portion between the battery module 2 and the control assembly 9. This embodiment utilizes space to reduce the distance between the battery module 2 and the control assembly 9, making connection by harness easier.

[0075] In some embodiments, in the first direction Z, the battery module 2 is closer to the fifth wall 18 than to 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 lowers the probability of harness failure.

[0076] In some embodiments, the control assembly 9 is electrically connected to the battery module 2 to enable control of the charging and discharging of the battery module 2. The control assembly 9 is fixed to the first case 1. Exemplarily, the control assembly 9 is bonded to the second wall 15 of the first case 1.

[0077] In some embodiments, the control assembly 9 includes a circuit board 92, control components 93, and a thermal conductive plate 94, the circuit board 92 including a first surface 921 and a second surface 922 positioned opposite each other along a third direction Y, the third direction Y being 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 components 93 and the thermal conductive plate 94 are mounted 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 heat conduction plate 94 conducts heat from the circuit board 92 and the control components 93, dissipating heat to the outside, thereby lowering the temperature of the circuit board 92 and the control components 93, and reducing the risk of damage to the circuit board 92 and the control components 93.

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

[0080] In some embodiments, the heat conductive 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, along the first direction Z, the control chip 933 is positioned between the battery module 2 and the heat conduction plate 94, which is advantageous for improving heat dissipation to the battery pack.

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

[0083] In some embodiments, the 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 than the control component 93 in the third direction Y. By making the heat conduction plate 94 higher than the control component 93 in the third direction Y, 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, the heat dissipation component 8 facing at least a portion of the heat conduction plate 94 along the first direction Z. The heat dissipation component 8 is installed on the fifth wall 18 and fixed to the fifth wall 18 by fasteners such as screws. The overlapping portion of 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 release heat from the heat conduction plate 94 to the outside of the battery pack. By facing at least a portion of the heat conduction plate 94, the heat dissipation efficiency can be improved.

[0086] In some embodiments, the control chip 933 can control the starting and stopping 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, which are mounted on the first case 1 and are located on either side of the control assembly 9 along the first direction Z. During the process of utilizing 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, and the airflow from the two fans passes through the heat conduction plate 94 of the control assembly 9, thereby releasing the heat from the heat 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. Exemplarily, the capacitor 931 can store energy and supply output energy. Preferably, the capacitor 931 can further remove interference and reduce circuit current ripple.

[0091] The heat dissipation component 8 can release heat from the capacitor 931 to the outside of the battery pack. By positioning the heat dissipation component 8 opposite at least a portion of the capacitor 931, the heat dissipation efficiency can be improved.

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

[0093] The first heat conduction plate 94a and the second heat conduction plate 94b isolate the capacitor 931 from both sides, reducing the diffusion of heat from the capacitor 931 to the surroundings and decreasing 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 heat from the capacitor 931, lowers the temperature of the capacitor 931, and improves the operating performance of the capacitor 931.

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

[0095] In some embodiments, the second subcase 32 is positioned facing the heat dissipation component 8 along the first direction Z. The second subcase 32 is provided with a plurality of through holes 325, at least a portion of which face the heat dissipation component 8 along the first direction Z.

[0096] The heat dissipation component 8 releases heat from inside the battery pack to the outside of the battery pack through multiple 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 heat conduction plate 94 includes a third heat conduction plate 94c. The third heat conduction plate 94c is connected to the inductor 932. The third heat conduction plate 94c absorbs heat from the inductor 932 and dissipates it to the outside, thereby lowering the temperature of the inductor 932 and improving its performance.

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

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

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

[0103] The second heat conduction plate 94b can isolate the control chip 933 and the capacitor 931. This reduces the heat conducted from the capacitor 931 to the control chip 933, lowers the temperature of the control chip 933, and improves the performance and lifespan of the control chip 933.

[0104] In some embodiments, the battery pack further includes a protrusion 91, which is positioned between the battery module 2 and the control assembly 9. The protrusion 91 can block heat from 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.

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

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

[0107] In some embodiments, the protrusion 91 and the second wall 15 are integrally molded, which is advantageous in improving the structural strength of the first case 1. In some embodiments, the protrusion 91 can be fixed to the second wall 15 by fasteners such as screws.

[0108] In some embodiments, multiple cables 96 are installed on the battery pack. In the second direction X, a wiring passage is pre-installed between the control assembly 9 and the battery module 2. At least some of the cables 96 are installed in the wiring passage. Installing a wiring passage between the control assembly 9 and the battery module 2 facilitates the integrated installation and fixing of multiple cables 96, and also increases the thermal insulation gap between the control assembly 9 and the battery module 2. Some of the cables 96 can be located between the control assembly 9 and the battery module 2 in the second direction X.

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

[0110] In some embodiments, the battery pack further includes a first component 6 installed in a 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. Exemplarily, the first component 6 includes a display.

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

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

[0114] As shown in Figures 3, 4 and 9-18, a first coupling part 311 is installed on the first subcase 31, and a second coupling part 321 is installed on the second subcase 32. The first coupling part 311 is configured to move from a first position to a second position of the second coupling part 321. In the first position, the first coupling part 311 engages with the second subcase 32, and in the second position, the first coupling part 311 is rotatably connected to the second subcase 32.

[0115] To open the first subcase 31, move the first subcase 31, move the first coupling portion 311 of the first subcase 31 to the second position, and then rotate the first subcase 31 to open it. To close the first subcase 31, rotate the first subcase 31 to a preset angle and then move it from the second position to the first position to engage the first coupling portion 311 with the second subcase 32.

[0116] To open the second subcase 32, the second subcase 32 is moved and rotated accordingly, thereby moving the first connecting portion 311 from the first position to the second position of the second connecting portion 321.

[0117] In some embodiments, the first and second positions are positioned along a second direction X. The first subcase 31 includes a first portion 312, and the second subcase 32 includes a second portion 322, with the first portion 312 and the second portion 322 positioned along the second direction X, and the first coupling portion 311 and the second coupling portion 321 positioned 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 subcase 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 subcase 33 restricts the relative movement of the first portion 312 and the second portion 322 in the second direction X, thereby maintaining the first coupling portion 311 in the first position of the second coupling portion 321 and achieving fixation between the first subcase 31 and the second subcase 32.

[0120] In some embodiments, in the second direction X, a first recess 312a is provided on the surface of the first portion 312 facing the second portion 322, and a second recess 322a is provided on the surface of the second portion 322 facing the first portion 312. A first engaging portion 331 and a second engaging portion 332 are provided at both ends of the third subcase 33 along the second direction X, with the first engaging portion 331 being inserted into the first recess 312a and the second engaging portion 332 being inserted into the second recess 322a.

[0121] The third subcase 33 engages with the first portion 312 and the second portion 322, respectively, by the first engaging portion 331 and the second engaging portion 332, thereby securing the first subcase 31, the second subcase 32, and the third subcase 33.

[0122] 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 case 1 and connected to the first case 1, and the first plate 4 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 engaging portion 313, which is located on the end face of the first portion 312 facing the first case 1, and the third engaging portion 313 is inserted through the second opening 41. When the first coupling portion 311 is in a first position, the third engaging portion 313 engages with the first plate 4, and when the first coupling portion 311 is in a second position, the third engaging 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 fasteners such as screws.

[0124] The first subcase 31 engages with the first plate 4 through the fitting of the third engaging portion 313 and the second opening 41, reducing the risk of the first subcase 31 rotating when the first connecting 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 component 312 facing the first plate 4, and at least a portion of the second component 5 is housed 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 a housing space for the second component 5 and protect the second component 5 from the outside. Exemplarily, the second component 5 may include a power harness connecting 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, the third opening 42 is provided as two, with each of the two third openings 42 facing two battery modules 2 in the first direction Z. The second component 5 can pass through the two third openings 42 and electrically connect the two battery modules 2.

[0128] In some embodiments, the first subcase 31 includes a third portion 314 connected to a first portion 312, the third portion 314 being located between the first portion 312 and the second portion 322 in a second direction X. The first coupling portion 311 is installed in the third portion 314.

[0129] In some embodiments, a first hole 3141 is provided on the side of the third portion 314 facing the first case 1, and a first protrusion 43 is provided on the first plate 4 which is inserted into the first hole 3141. The first protrusion 43 is inserted into the first hole 3141 and restricts the movement of the first subcase 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 communicate 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 in a first position, the first protrusion 43 is inserted into the first hole portion 3141a, and when the first coupling portion 311 is in a 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 engages with the first subcase 31 by fitting into the first hole portion 3141a, which has a smaller diameter. When the first coupling portion 311 is in the second position, the first protrusion 43 is inserted into the second hole portion 3141b. When the first subcase 31 is rotated in the direction of opening, the second hole portion 3141b, which has a larger diameter, can provide space for the rotation of the first protrusion 43, making it less likely for the rotation of the first protrusion 43 to interfere. When the first subcase 31 is rotated in the direction of closing, the first protrusion 43 is easier to insert into the second hole portion 3141b, which has a larger 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, where 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 subcase 31. The third subcase 33 covers at least a portion of the first component 6, acting as a protective element and 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 component 6 includes a display. The third subcase 33 exposes a portion of the display, making it easier for employees to observe the operating status of the battery pack.

[0135] In some embodiments, the second subcase 32 includes a second protrusion 323, which projects from a surface of the second portion 322 facing the first portion 312 along a second direction Y, and the second connector 321 is fitted onto the second protrusion 323. The first subcase 31 further includes a fourth portion 315, which is connected to the first portion 312 and is positioned opposite the second protrusion 323 along a third direction Y, the third direction Y being perpendicular to the second direction X. The first connector 311 projects from a surface of the fourth portion 315 facing the second protrusion 323 along the third direction Y, and is fitted into the second connector 321.

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

[0137] In some embodiments, the second joint 321 includes a third hole 321a. The size of the third hole 321a along the first direction Z at the second position is greater than the size of the third hole 321a along the first direction Z at the first position, 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 coupling portion 311 can engage with the hole wall of the third hole 321a at the first position of the third hole 321a. At the second position of the third hole 321a, the size along the first direction Z is large, and the first coupling 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] Third holes 321a are provided in each of the second protrusions 323, and first connecting parts 311 are provided in each of the two fourth parts 315. The two first connecting parts 311 fit into the two third holes 321a, thereby improving the stability of the connection between the first subcase 31 and the second subcase 32.

[0141] 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 faces at least a portion of the heat dissipation component 8.

[0142] In some embodiments, the battery pack further includes a second plate 7, which is located on the side of the second portion 322 facing the first case 1 and connected to the first case 1, and 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 a first direction Z. A fourth opening 71 is provided in the second plate 7, and the second sub-case 32 includes a fourth engaging portion 324, which is located on the end face of the second portion 322 facing the first case 1, and the fourth engaging portion 324 is inserted through the fourth opening 71. When the first coupling portion 311 is in a first position, the fourth engaging portion 324 engages with the second plate 7, and when the first coupling portion 311 is in a second position, the fourth engaging 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 fasteners.

[0144] The second subcase 32 engages with the second plate 7 through the fitting of the fourth engaging portion 324 and the fourth opening 71, reducing the risk of the second subcase 32 rotating when the first connecting 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, and the heat dissipation component 8 faces the fifth opening 72 along the first direction Z, with the second portion 322 covering the fifth opening 72. The presence of the heat dissipation component 8 allows gases from outside the battery pack to enter the battery pack through the fifth opening 72, or gases from inside the battery pack to be discharged to the outside of the battery pack through the fifth opening 72.

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

[0147] The partition portion 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, The battery module housed in the first case, A second case connected to the first case, comprising a first subcase and a second subcase, wherein the first subcase is connected to the first case and covers at least a portion of the first opening, and the second subcase is connected to the first case and configured to be openable, A first coupling portion is provided on the first subcase, a second coupling portion is provided on the second subcase, the first coupling portion is configured to move from a first position to a second position of the second coupling portion, the first coupling portion engages with the second subcase at the first position, and the first coupling portion is rotatably connected to the second subcase at the second position. Battery pack.

2. The battery module is installed facing the first subcase along the 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 installed facing the second subcase 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 subcase covers at least a portion of the first region, and the second subcase covers at least a portion of the second region. The first case includes a partition, the partition divides the first opening into a first region and a second region. The battery pack according to claim 2.

4. The control assembly includes a circuit board, control components, and a thermal conductive plate, the circuit board includes a first surface and a second surface positioned opposite each other along a third direction, the third direction being perpendicular to the first and second directions, The second surface is connected to the first case, and the control components 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, and the control assembly is connected to the first component by a cable. The second case further includes a third subcase, the third subcase being connected to the first subcase and the second subcase, In the first direction, the third subcase 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 set along the second direction, The first subcase includes a first portion, the second subcase includes a second portion, the first portion and the second portion are arranged along the second direction, and the first and second coupling portions 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 subcase, at least a portion of which is located between the first and second parts and in contact with the first and second parts. The battery pack according to claim 6.

8. In the second direction, a first recess is provided on the surface of the first portion facing the second portion, and a second recess is provided on the 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 subcase along the second direction, the first engaging portion is inserted into the first recess, and the second engaging portion is inserted into the second recess. The battery pack according to claim 7.

9. Further comprising a first plate, the first plate located on the 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 subcase includes a third engaging portion, the third engaging portion is provided on the end face of the first portion facing the first case, and the third engaging portion is inserted through the second opening. When the first coupling portion is in the first position, the third engaging portion engages with the first plate, and when the first coupling portion is in the second position, the third engaging portion disengages from the first plate. The battery pack according to claim 6.

10. A third opening is provided in the first plate, and the battery pack further includes a second component, the second component being inserted through the third opening and electrically connected to the battery module. A third recess is provided on the side of the first portion facing the first plate, and at least a portion of the second part is housed in the third recess. The battery pack according to claim 9.

11. The first subcase 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 connecting portion is installed in the third portion. The battery pack according to claim 9.

12. A first hole is provided on the side of the third portion facing the first case, and a first protrusion is provided on the first plate that is 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 diameter of the second hole portion is larger than the diameter of the first hole portion. When the first coupling portion is located in the first position, the first protrusion is inserted into the first hole; when the first coupling portion is located in the second position, the first protrusion is inserted into the second hole. 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 subcase, at least a portion of the first component is housed in the second hole, and at least a portion of the third subcase is located between the first and second portions 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 subcase includes a second protrusion, the second protrusion projecting from the surface of the second portion facing the first portion along the second direction, and the second coupling portion is installed on the second protrusion. The first subcase further includes a fourth portion, the fourth portion being connected to the first portion and positioned opposite the second protrusion along a third direction, the third direction being perpendicular to the second direction, The first connecting portion protrudes from the surface of the fourth portion facing the second convex portion along the third direction and is inserted into the second connecting portion. The battery pack according to claim 6.

15. The second portion covers at least a part of the first opening, The battery pack further includes a second plate, the second plate located on the side of the second portion facing the first case and connected to the first case, and the second plate covers at least a portion of the first opening. The second plate and the second portion are arranged along the first direction, A fourth opening is provided in the second plate, the second subcase includes a fourth engaging portion, the fourth engaging portion is provided on the end face 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 in the first position, the fourth engaging portion engages with the second plate, and when the first coupling portion is in the second position, the fourth engaging portion disengages from the second plate. The battery pack according to claim 6.

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