Battery module, battery pack and electrical apparatus

Abstract

A battery module (10), a battery pack (20) and an electrical apparatus. The battery module (10) comprises a battery cell group (100) and a support (200). The battery cell group (100) comprises a plurality of battery cells (11), a first gap (101) being formed between the plurality of battery cells (11). The support (200) accommodates the battery cell group (100). The support (200) is provided with a first opening (201) on one side in the first direction (X), and is provided with a second opening (202) on one side of the reverse direction of the first direction (X), both the first opening (201) and the second opening (202) being communicated with the outside of the battery module (10), and the first opening (201) and the second opening (202) being communicated by means of the first gap (101).

Description

Battery modules, battery packs and electrical devices

[0001] Cross-references to related applications

[0002] This application claims priority to Chinese patent application CN202311474196.3, filed on November 7, 2023, entitled “Battery Module, Battery Pack and Electrical Device”, the entire contents of which are incorporated herein by reference. Technical Field

[0003] This application relates to the field of battery technology, and more specifically, to a battery module, a battery pack, and an electrical device. Background Technology

[0004] When the battery module is used under continuous charging and discharging conditions, it may cause the battery module temperature to become too high, which may lead to thermal runaway of the battery module and affect the normal use of the electrical device.

[0005] Summary of the Invention

[0006] This application provides a battery module, a battery pack, and an electrical device that can improve the heat dissipation capacity of the battery module.

[0007] In a first aspect, this application provides a battery module, including:

[0008] A battery cell assembly includes multiple battery cells, with a first gap formed between the multiple battery cells;

[0009] The bracket houses the battery cell assembly. The bracket has a first opening on one side in a first direction and a second opening on the opposite side in the first direction. Both the first opening and the second opening communicate with the outside of the battery module and are connected through the first gap.

[0010] In the above technical solution, the battery module includes a cell assembly and a support frame. The cell assembly includes multiple cells, enabling the battery module to have a larger capacity. The support frame houses the cell assembly, providing support and protection, ensuring stability during charging and discharging, and reducing the possibility of damage to the cell assembly due to external forces. The support frame has a first opening on one side in a first direction and a second opening on the opposite side of the first direction. Both the first and second openings are connected to the outside of the battery module, and are connected by a first gap. This forms a heat dissipation channel connecting the first opening, the first gap, and the second opening to the outside of the battery module, allowing heat from the cells to dissipate to the outside of the battery module. Gas can also dissipate heat from the cell assembly through the heat dissipation channel, thereby improving the heat dissipation capacity of the battery module, reducing the possibility of thermal runaway during charging and discharging, and extending the service life of the battery module.

[0011] In one or more embodiments of the first aspect, the support is provided with a first flow guide on one side of the first direction, the first flow guide being configured to guide airflow to the first opening.

[0012] In the above technical solution, by providing a first guide section on one side of the bracket along the first direction and configuring the first guide section to guide the airflow to the first opening, the airflow entering the battery module from the outside of the battery module can enter the first opening through the first guide section, and then flow to the second opening through the first gap. This can guide the airflow into the first opening, increase the airflow rate and speed of the first opening, and thus further improve the heat dissipation capacity of the battery module.

[0013] In one or more embodiments of the first aspect, the first guide portion is arranged in an arc shape.

[0014] In the above technical solution, by making the first guide part arc-shaped, the airflow entering the battery module along the first direction can change direction through the first guide part to flow to the first opening, and the process of the airflow flowing from the outside of the battery module to the first opening is smooth and the airflow speed is faster, thereby further improving the heat dissipation capacity of the battery module.

[0015] In one or more embodiments of the first aspect, the bracket includes a body and a flange, a first opening is provided on one side of the body in the first direction, a second opening is provided on the side of the body in the opposite direction to the first direction, the flange is provided on one side of the body in the first direction and extends along the first direction, the flange forms a first air vent, and the first air vent communicates with the first opening.

[0016] Along the first direction, the projection of the first air guide overlaps with the projection of the first air vent.

[0017] In the above technical solution, the bracket includes a main body and a flange. A first opening is located on one side of the main body in the first direction, and a second opening is located on the opposite side of the main body in the first direction. The flange is located on one side of the main body in the first direction and extends along the first direction. The flange forms a first air vent, and the first air vent communicates with the first opening. Along the first direction, the projection of the first guide section overlaps with the projection of the first air vent, so that the airflow entering the battery module from the first air vent can flow directly through the first guide section to the first opening. The airflow process is smoother, and the airflow speed is faster, thereby further improving the heat dissipation capacity of the battery module.

[0018] In one or more embodiments of the first aspect, the flange includes a peripheral wall having a communication port that connects the first air vent and the first opening.

[0019] In the above technical solution, the flange includes a peripheral wall, and the peripheral wall is provided with a connecting port. The connecting port connects the first air inlet and the first opening, so that the airflow entering the battery module from the first air inlet along the first direction can change direction through the connecting port to flow to the first opening.

[0020] In one or more embodiments of the first aspect, the battery cell assembly includes a first battery cell and a second battery cell disposed adjacent to each other in a second direction, the first gap being located between the first battery cell and the second battery cell;

[0021] The support also includes a second guide portion and a third guide portion, the second guide portion being connected to the first guide portion, and the second and third guide portions being configured to guide airflow to the first gap; the second direction is perpendicular to the first direction.

[0022] In the above technical solution, the battery pack includes a first battery cell and a second battery cell arranged adjacent to each other in a second direction, with a first gap located between the first battery cell and the second battery cell; the bracket also includes a second flow guide and a third flow guide, the second flow guide being connected to the first flow guide, and the second flow guide and the third flow guide being configured to guide airflow to the first gap, so that the airflow has a better heat dissipation effect on the first battery cell and the second battery cell, and can reduce the possibility of the first battery cell and the second battery cell overheating or even thermal runaway during charging and discharging.

[0023] In one or more embodiments of the first aspect, the support further includes a fourth flow guide, at least partially disposed at an end of the support in the opposite direction to the second direction, the fourth flow guide being connected to the first flow guide;

[0024] The fourth flow guide portion forms a flow guide channel, which surrounds at least a portion of the end of the cell assembly in the opposite direction to the second direction, and the flow guide channel is also connected to the outside of the battery module.

[0025] In the above technical solution, the bracket also includes a fourth flow guide, at least a portion of which is located at the end of the bracket in the opposite direction of the second direction. The fourth flow guide is connected to the first flow guide. The fourth flow guide forms a flow channel that surrounds at least a portion of the end of the cell assembly in the opposite direction of the second direction. The flow channel is also connected to the outside of the battery module, allowing airflow to flow within the flow channel to dissipate heat from at least a portion of the cell assembly surrounded by the flow channel. Furthermore, at least a portion of the cell assembly surrounded by the flow channel is not exposed in the first opening. By dissipating heat through the flow channel and the first opening, the overall heat dissipation capacity of the battery module is improved, and the possibility of thermal runaway during charging and discharging of the battery module is lower.

[0026] In one or more embodiments of the first aspect, the first opening extends along a second direction, in which the first opening has a first end near the first guide portion and a second end away from the first guide portion;

[0027] The width of the first opening in the third direction increases along the second direction;

[0028] The third direction, the first direction, and the second direction are perpendicular to each other.

[0029] In the above technical solution, the first opening extends along the second direction, allowing the airflow entering the first opening to dissipate heat from the multiple battery cells exposed within it. This results in a wider heat dissipation range and stronger overall heat dissipation capability of the battery module. Furthermore, the width of the first opening in the third direction increases along the second direction, allowing the airflow to cover a larger area and dissipate heat more effectively as it flows from the first end to the second end of the first opening, thus enhancing the overall heat dissipation capability of the battery module.

[0030] In one or more embodiments of the first aspect, along the third direction, the first opening has a first sidewall and a second sidewall, the first sidewall being parallel to the second direction and the second sidewall being inclined relative to the second direction.

[0031] In the above technical solution, along the third direction, the first opening has a first sidewall and a second sidewall. The first sidewall is parallel to the second direction, and the second sidewall is inclined relative to the second direction, so that the airflow flows along the second direction on the first sidewall and travels a longer distance in the second direction to dissipate heat from more cells. At the same time, the airflow flows along the second sidewall in a direction inclined relative to the second direction, so that the airflow can flow towards the second end of the first opening and also towards the third direction to dissipate heat from the end of the cell in the third direction, making the overall heat dissipation capacity of the battery module stronger.

[0032] In one or more embodiments of the first aspect, the second opening extends along the second direction.

[0033] In the above technical solution, the second opening extends along the second direction, so that the airflow entering the second opening can dissipate heat on the multiple cells exposed in the second opening. The heat dissipation range of the airflow is wider, and the overall heat dissipation capacity of the battery module is stronger.

[0034] In one or more embodiments of the first aspect, the second opening includes a first sub-opening and a second sub-opening, wherein the projection of the first sub-opening overlaps with that of the first opening in the first direction, and the second sub-opening extends in the opposite direction to the second direction;

[0035] Along a third direction, the width of the first sub-opening is greater than the width of the second sub-opening;

[0036] The third direction, the first direction, and the second direction are perpendicular to each other.

[0037] In the above technical solution, the second opening includes a first sub-opening and a second sub-opening. In the first direction, the projection of the first sub-opening overlaps with that of the first opening. The second sub-opening extends in the opposite direction of the second direction, allowing airflow to directly reach the first sub-opening through the first opening and the first gap, thereby dissipating heat from the battery cell whose projection overlaps with that of the first sub-opening and the first opening along the first direction. Since the projection of the first sub-opening overlaps with that of the first opening in the first direction, after the airflow flows from the first opening and the first gap to the side of the bracket where the second opening is located, it is easier for the airflow to flow into the first sub-opening, but it is difficult for it to flow into the second sub-opening. In this application, the width of the first sub-opening is greater than the width of the second sub-opening along the third direction, which allows the airflow reaching the side of the bracket where the second opening is located to flow at a speed greater than that of the first sub-opening. This makes it easier for the airflow to flow into the second sub-opening, thereby dissipating heat from the battery cell exposed in the second sub-opening along the first direction, resulting in a stronger overall heat dissipation capacity of the battery module.

[0038] In one or more embodiments of the first aspect, the bracket includes a first bracket and a second bracket, the second bracket and the first bracket being arranged along a third direction to form the first opening and the second opening;

[0039] The third direction is perpendicular to the first direction.

[0040] In the above technical solution, the bracket includes a first bracket and a second bracket. The second bracket and the first bracket are arranged along a third direction to form a first opening and a second opening, which facilitates the assembly of the battery cell assembly with the bracket.

[0041] In one or more embodiments of the first aspect, the battery cell is a cylindrical battery cell.

[0042] Secondly, this application provides a battery pack, including the battery module as described above, the battery pack further including:

[0043] The outer casing includes a first shell portion and a second shell portion opposite to each other in the first direction. The first shell portion is provided with a first through hole, and the second shell portion is provided with a second through hole. Both the first through hole and the second through hole communicate with the outside of the battery pack.

[0044] The battery module is disposed inside the housing;

[0045] In the first direction, the first opening is disposed opposite to the first shell portion, the second opening is disposed opposite to the second shell portion, the first opening communicates with the first through hole, and the second opening communicates with the second through hole.

[0046] In the above technical solution, the battery pack includes a shell and a battery module. The battery module is disposed inside the shell, so that the shell can support and protect the battery module, keeping the battery module stable during charging and discharging, and reducing the risk of damage to the battery module due to external forces. The shell includes a first shell portion and a second shell portion opposite to each other in a first direction. The first shell portion is provided with a first through hole, and the second shell portion is provided with a second through hole. Both the first through hole and the second through hole are connected to the outside of the battery pack. In the first direction, a first opening is opposite to the first shell portion, and a second opening is opposite to the second shell portion. The first opening is connected to the first through hole, and the second opening is connected to the second through hole. The first through hole, the first opening, the first gap, the second opening, and the second through hole form a heat dissipation channel connected to the outside of the battery pack. Gas can dissipate heat to the battery cell assembly through the heat dissipation channel, thereby improving the heat dissipation capacity of the battery pack, reducing the possibility of thermal runaway during charging and discharging, and extending the service life of the battery pack.

[0047] In one or more embodiments of the second aspect, the second housing portion is further provided with a third through hole, the third through hole communicating with the outside of the battery pack, the third through hole being located at the end of the second housing portion, and the third through hole communicating with the outside of the battery module; the second direction is perpendicular to the first direction.

[0048] In the above technical solution, the second shell is also provided with a third through hole, which is connected to the outside of the battery pack. The third through hole is located at the end of the second shell and is connected to the outside of the battery module, so that the airflow inside the shell can flow out through the third through hole, thereby dissipating heat from the battery cells located at the end of the cell group along the second direction, making the overall heat dissipation capacity of the battery module stronger.

[0049] In one or more embodiments of the second aspect, the bracket further includes a fourth flow guide portion forming a flow guide channel surrounding at least a portion of the end of the cell assembly in the opposite direction to the second direction, and the flow guide channel also communicates with the outside of the battery module; along the first direction, the projection of the third through hole overlaps with the projection of the flow guide channel.

[0050] In the above technical solution, along the first direction, the projection of the third through hole overlaps with the projection of the guide channel, so that the airflow entering the battery pack from the third through hole can flow directly to the guide channel, and the airflow in the guide channel can flow out of the battery pack through the third through hole. The airflow process is smoother and the airflow speed is faster, thereby further improving the heat dissipation capacity of the battery pack.

[0051] In one or more embodiments of the second aspect, the bracket is provided with a first air vent, which is connected to the first opening and the first through hole respectively; along the first direction, the projection of the first air vent overlaps with the projection of the first through hole.

[0052] In the above technical solution, the bracket is provided with a first air vent, which is connected to a first opening and a first through hole respectively; along the first direction, the projection of the first air vent overlaps with the projection of the first through hole, so that the airflow entering the battery pack from the first through hole can flow directly to the inside of the battery module through the first air vent, making the airflow process smoother and the airflow speed faster, thereby further improving the heat dissipation capacity of the battery pack.

[0053] In one or more embodiments of the second aspect, the battery pack further includes a circuit board electrically connected to the battery cell assembly; along the first direction, the circuit board is disposed between the bracket and the first housing portion, the circuit board has a third opening, and along the first direction, the projection of the third opening overlaps with the projection of the first air vent.

[0054] In the above technical solution, the battery pack also includes a circuit board, which is electrically connected to the cell group, so that the circuit board can be used to control the charging and discharging of multiple cells in the cell group; along the first direction, the circuit board is disposed between the bracket and the first shell, and the circuit board is provided with a third opening. Along the first direction, the projection of the third opening overlaps with the projection of the first air vent, so that the airflow entering the battery pack from the first through hole can flow directly to the interior of the battery module through the first air vent, reducing the possibility of the circuit board blocking the airflow.

[0055] In one or more embodiments of the second aspect, the circuit board is spaced apart from the first opening to form a second gap, the second gap communicating with the first air vent.

[0056] In the above technical solution, the circuit board and the first opening are spaced apart to form a second gap. The second gap is connected to the first air vent, so that the airflow flowing into the battery module through the first air vent can also flow in the second gap. This allows more gas to flow into the battery module through the first air vent, improving the heat dissipation effect on the battery cell assembly and also achieving heat dissipation on the circuit board, thereby making the overall heat dissipation capacity of the battery pack stronger.

[0057] In one or more embodiments of the second aspect, the circuit board includes a first conductive terminal and a second conductive terminal; both the first conductive terminal and the second conductive terminal are disposed on the surface of the circuit board opposite to the bracket, and the first conductive terminal and the second conductive terminal are configured to input and output electrical energy of the battery pack; along the first direction, the projection of the first conductive terminal overlaps with the projection of the first opening, and / or, along the first direction, the projection of the second conductive terminal overlaps with the projection of the first opening.

[0058] In the above technical solution, the circuit board includes a first conductive terminal and a second conductive terminal. Both the first and second conductive terminals are disposed on the surface of the circuit board away from the support, which facilitates the connection of the first and second conductive terminals with other mechanisms. The first and second conductive terminals are configured to input and output electrical energy of the battery pack, enabling the battery pack to provide electrical energy to other mechanisms. Along the first direction, the projection of the first conductive terminal overlaps with the projection of the first opening, and / or, along the first direction, the projection of the second conductive terminal overlaps with the projection of the first opening, so that the airflow through the first opening can dissipate heat from at least one of the first and second conductive terminals, reducing the possibility of the circuit board temperature becoming too high or even causing thermal runaway.

[0059] In one or more embodiments of the second aspect, the first opening includes a first region and a second region arranged along a second direction, wherein, along a third direction, the width of the second region is greater than the width of the first region;

[0060] Along the first direction, the projection of the first conductive terminal overlaps with the projection of the second region, and / or, along the first direction, the projection of the second conductive terminal overlaps with the projection of the second region;

[0061] The third direction, the second direction, and the first direction are perpendicular to each other.

[0062] In the above technical solution, the first opening includes a first region and a second region arranged along a second direction. Along the third direction, the width of the second region is greater than the width of the first region. Along the first direction, the projection of the first conductive terminal overlaps with the projection of the second region, and / or, along the first direction, the projection of the second conductive terminal overlaps with the projection of the second region, resulting in a larger airflow in the second region and better heat dissipation for at least one of the first and second conductive terminals, further reducing the possibility of the circuit board temperature becoming too high or even causing thermal runaway.

[0063] In one or more embodiments of the second aspect, the battery pack further includes an electrical connector that connects at least two of the battery cells;

[0064] The electrical connector includes a first part and a second part, and the first part and the second part are connected.

[0065] In the first direction, the first portion is disposed between the bracket and the first housing portion, and the first portion is connected to the circuit board;

[0066] In the third-party direction, the second part is disposed between the bracket and the second housing, and the second part is connected to the battery cell;

[0067] Wherein, the first direction is perpendicular to the third direction.

[0068] In the above technical solution, the battery pack also includes an electrical connector, which connects at least two battery cells to connect multiple battery cells in series or in parallel. The electrical connector includes a first part and a second part, which are connected. In a first direction, the first part is located between the bracket and the first shell and is connected to the circuit board. In a third direction, the second part is located between the bracket and the second shell and is connected to the battery cell, so that the circuit board can be electrically connected to the battery cell through the first part and the second part to obtain parameters such as voltage, current, resistance, and temperature of the battery cell in real time, which is convenient for controlling the charging and discharging of the battery cell.

[0069] Thirdly, this application provides an electrical device including a load and a battery module or battery pack as described above, wherein the battery module or battery pack supplies power to the load. Attached Figure Description

[0070] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings used in the embodiments will be briefly described below. It should be understood that the following drawings only show some embodiments of this application and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained based on these drawings.

[0071] Figure 1 is a three-dimensional structural diagram of a battery module provided in some embodiments of this application;

[0072] Figure 2 is a schematic diagram of the structure of a battery module provided in some embodiments of this application, viewed from the opposite direction to the first direction;

[0073] Figure 3 is a schematic diagram of the structure of a battery module provided in some embodiments of this application, viewed from the opposite direction of the first direction;

[0074] Figure 4 is a schematic diagram of the structure of a battery module provided in some embodiments of this application, viewed along a first direction.

[0075] Figure 5 is a cross-sectional view of the battery module and circuit board provided in some embodiments of this application along line II of Figure 1;

[0076] Figure 6 is a schematic diagram of a portion of the support structure of a battery module provided in some embodiments of this application;

[0077] Figure 7 is a three-dimensional structural schematic diagram of a battery module provided in some embodiments of this application from another perspective;

[0078] Figure 8 is a schematic diagram of the structure of the battery module bracket provided in some embodiments of this application, viewed along the first direction.

[0079] Figure 9 is a three-dimensional structural diagram of a battery pack provided in some embodiments of this application;

[0080] Figure 10 is a schematic diagram of the structure of a battery pack provided in some embodiments of this application, viewed along a first direction.

[0081] Figure 11 is an exploded structural diagram of a battery pack provided in some embodiments of this application from one perspective;

[0082] Figure 12 is a cross-sectional view of the battery pack provided in some embodiments of this application along line II-II of Figure 9;

[0083] Figure 13 is a schematic diagram of a portion of the battery pack structure provided in some embodiments of this application;

[0084] Figure 14 is a schematic diagram of the structure of a battery pack provided in some embodiments of this application, viewed from the opposite direction to the first direction;

[0085] Figure 15 is a cross-sectional view of a portion of the battery pack structure provided in some embodiments of this application, viewed in the opposite direction to the third direction along line II-II of Figure 9.

[0086] Figure 16 is an exploded structural diagram of a battery pack provided in some embodiments of this application from another perspective;

[0087] Figure 17 is a cross-sectional view of a battery pack provided in some embodiments of this application along line II-II of Figure 9;

[0088] Figure 18 is a schematic diagram of the structure of an electrical device provided in some embodiments of this application;

[0089] Figure 19 is a schematic diagram of the structure of an electrical device provided in some other embodiments of this application;

[0090] Figure 20 is a schematic diagram of the structure of an electrical device provided in some other embodiments of this application.

[0091] Icons: 10-Battery module; 101-First gap; 102-Second gap; 100-Cell assembly; 11-Cell; 110-First cell; 120-Second cell; 130-Third cell; 200-Bracket; 201-First opening; 2011-First region; 2012-Second region; 2013-First end; 2014-Second end; 202-Second opening; 2021-First sub-opening; 2022-Second sub-opening; 203-First vent; 204-Connecting port; 205-Guiding channel; 206-Fourth opening; 210-First bracket; 211-First sidewall; 220-Second bracket; 221-Second sidewall; 231-Main body; 232-Flange; 2321-Peripheral wall; 233-First guiding section; 2 34-Second guide section; 235-Third guide section; 236-Fourth guide section; 2361-First guide plate; 2362-Second guide plate; 2363-Third guide plate; 237-Support member; 238-Second limiting protrusion; 300-Outer shell; 301-First through hole; 302-Second through hole; 303-Third through hole; 310-First shell part; 320-Second shell part; 321-First limiting protrusion; 400-Circuit board; 401-Third opening; 410-First conductive terminal; 420-Second conductive terminal; 500-Electrical connector; 510-First part; 20-Battery pack; 30-Load; X-First direction; X'-Opposite direction of the first direction; Y-Second direction; Z-Third direction; Z'-Opposite direction of the third direction.

[0092] Specific implementation methods

[0093] To make the objectives, technical solutions, and advantages of this application clearer, the technical solutions in the embodiments of this application will be clearly described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this application. All other embodiments obtained by those skilled in the art based on the embodiments of this application are within the scope of protection of this application.

[0094] Unless otherwise defined, all technical and scientific terms used in this application have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains; the terminology used in the specification of this application is for the purpose of describing particular embodiments only and is not intended to limit the application; the terms "comprising" and "having" and any variations thereof in the specification, claims and foregoing description of the drawings are intended to cover non-exclusive inclusion.

[0095] The terms "first," "second," etc., in the specification, claims, or the accompanying drawings of this application are used to distinguish different objects, rather than to describe a specific order or primary / secondary relationship.

[0096] In this application, the reference to "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places in the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment that is mutually exclusive with other embodiments.

[0097] In the embodiments of this application, the same reference numerals denote the same components, and for the sake of brevity, detailed descriptions of the same components are omitted in different embodiments. It should be understood that the thickness, length, width, and other dimensions of various components in the embodiments of this application shown in the accompanying drawings, as well as the overall thickness, length, width, and other dimensions of the integrated device, are merely illustrative and should not constitute any limitation on this application.

[0098] With the development of the new energy industry, batteries are gradually moving towards higher energy density and higher power density. However, high-energy-density and high-power-density batteries are more prone to heat generation. Currently, the cells in battery modules mainly dissipate heat to the outside of the bracket through contact, resulting in poor heat dissipation of the battery module. This can lead to overheating and potentially thermal runaway. Therefore, improving the heat dissipation of battery modules has become an urgent problem to be solved.

[0099] To improve the heat dissipation effect of the battery module, this application provides a battery module including a cell assembly and a bracket. The cell assembly includes multiple cells with a first gap between them. The bracket houses the cell assembly. The bracket has a first opening on one side in a first direction and a second opening on the opposite side in the first direction. Both the first opening and the second opening are connected to the outside of the battery module and are connected through the first gap.

[0100] In this type of battery module, the battery module includes a cell assembly and a support frame. The cell assembly contains multiple cells, enabling a larger battery module capacity. The support frame houses the cell assembly, providing support and protection, ensuring stability during charging and discharging, and reducing the possibility of damage to the cell assembly due to external forces. The support frame has a first opening on one side in a first direction and a second opening on the opposite side of the first direction. Both the first and second openings are connected to the outside of the battery module through a first gap, forming a heat dissipation channel that allows gas to dissipate heat from the cell assembly through the heat dissipation channel. This improves the heat dissipation capacity of the battery module, reduces the possibility of thermal runaway during charging and discharging, and extends the service life of the battery module.

[0101] This application provides a battery pack including a battery module. The battery pack may be cylindrical, flat, cuboid, or other shapes, and this application is not limited to these shapes.

[0102] This application provides an electrical device that uses a battery module or battery pack as a power source. The electrical device can be, but is not limited to, mobile phones, tablets, laptops, electric toys, power tools, electric vehicles, electric cars, ships, spacecraft, etc.

[0103] Referring to Figures 1 to 4, this application provides a battery module 10, including a cell assembly 100 and a bracket 200. The cell assembly 100 includes a plurality of cells 11 (e.g., the first cell 110 (11), the second cell 120 (11), and the third cell 130 (11) shown in the figure), and the bracket 200 houses the cell assembly 100.

[0104] In some embodiments, a first gap 101 is formed between the plurality of battery cells 11.

[0105] In some embodiments, forming a first gap 101 between a plurality of battery cells 11 may be forming a first gap 101 between two adjacent battery cells 11.

[0106] In some embodiments, a first gap 101 may be formed between some of the multiple battery cells 11 and other portions of the battery cells 11.

[0107] In some embodiments, a first gap 101 may be formed between a portion of the multiple battery cells 11 and a single battery cell 11.

[0108] In some embodiments, the bracket 200 has a first opening 201 on one side of the first direction X and a second opening 202 on the opposite side of the first direction X. Both the first opening 201 and the second opening 202 are connected to the outside of the battery module 10.

[0109] In some embodiments, the first opening 201 and the second opening 202 are connected through the first gap 101.

[0110] In this embodiment, the first direction X, the second direction Y, and the third direction Z are perpendicular to each other.

[0111] In other embodiments, the first direction X, the second direction Y, and the third direction Z may also intersect each other.

[0112] The battery cell 11 can be a secondary battery or a primary battery, such as a lithium-ion battery, a sodium-ion battery or a magnesium-ion battery, etc., and this application embodiment does not limit it.

[0113] In some embodiments, cell 11 is a cylindrical cell.

[0114] In other embodiments, cell 11 may also be a square cell.

[0115] In other embodiments, cell 11 may also be a pouch cell.

[0116] In some embodiments, the first opening 201 may be generally square.

[0117] In other embodiments, the first opening 201 may also be circular, elliptical, racetrack-shaped, or other similar shapes.

[0118] The battery module 10 includes a cell assembly 100 and a support 200. The cell assembly 100 includes multiple cells 11, which enables the battery module 10 to have a larger capacity. The support 200 houses the cell assembly 100, providing support and protection for the cell assembly 100, ensuring its stability during charging and discharging, and reducing the possibility of damage to the cell assembly 100 due to external forces. The bracket 200 has a first opening 201 on one side of the first direction X and a second opening 202 on the opposite side of the first direction X. Both the first opening 201 and the second opening 202 are connected to the outside of the battery module 10. The first opening 201 and the second opening 202 are connected through a first gap 101, so that the first opening 201, the first gap 101 and the second opening 202 form a heat dissipation channel connected to the outside of the battery module 10. Gas can dissipate heat to the cell assembly 100 through the heat dissipation channel, thereby improving the heat dissipation capacity of the battery module 10, reducing the possibility of thermal runaway during the charging and discharging process of the battery module 10, and extending the service life of the battery module 10.

[0119] Referring also to Figures 5 to 7, in some embodiments, the support 200 is provided with a first guide portion 233 on one side of the first direction X, and the first guide portion 233 is configured to guide the airflow to the first opening 201.

[0120] By providing a first guide section 233 on one side of the bracket 200 along the first direction X, and configuring the first guide section 233 to guide airflow to the first opening 201, the airflow entering the battery module 10 from the outside of the battery module 10 can enter the first opening 201 through the first guide section 233, and then flow to the second opening 202 through the first gap 101. This can increase the speed at which the airflow enters the first opening 201, thereby further improving the heat dissipation capacity of the battery module 10.

[0121] In some embodiments, the first guide portion 233 is arranged in an arc shape.

[0122] By making the first guide section 233 arc-shaped, the airflow entering the battery module 10 along the first direction X can be redirected by the first guide section 233 to flow to the first opening 201. The process of the airflow flowing from the outside of the battery module 10 to the first opening 201 is smooth and the airflow speed is faster, thereby further improving the heat dissipation capacity of the battery module 10.

[0123] In other embodiments, the first guide portion 233 may also be L-shaped, which is not a limitation.

[0124] In some embodiments, the bracket 200 includes a body 231 and a flange 232. A first opening 201 is located on one side of the body 231 in the first direction X, and a second opening 202 is located on the opposite side of the body 231 in the first direction X. The flange 232 is located on one side of the body 231 in the first direction X and extends along the first direction X, forming a first air vent 203, which communicates with the first opening 201. Along the first direction X, the projection of the first air guide 233 overlaps with the projection of the first air vent 203.

[0125] In some embodiments, along the first direction X, the projection of the first air guide 233 overlaps with the projection of the first air vent 203. This overlap could be partial, the projection of the first air vent 203 could be within the projection of the first air guide 223, or the projection of the first air guide 233 could be within the projection of the first air vent 203.

[0126] In some embodiments, the flange 232 may be rectangular in cross-section perpendicular to the first direction X.

[0127] In other embodiments, the flange 232 may also be circular, elliptical or other shapes along a cross section perpendicular to the first direction X.

[0128] In some embodiments, the first air vent 203 may be rectangular.

[0129] In other embodiments, the first air vent 203 may also be arranged in a circular, elliptical or other shapes.

[0130] The bracket 200 includes a main body 231 and a flange 232. A first opening 201 is located on one side of the main body 231 in the first direction X, and a second opening 202 is located on the opposite side of the main body 231 in the first direction X. The flange 232 is located on one side of the main body 231 in the first direction X and extends along the first direction X. The flange 232 forms a first air vent 203, which communicates with the first opening 201. Along the first direction X, the projection of the first guide section 233 overlaps with the projection of the first air vent 203, so that the airflow entering the battery module 10 from the first air vent 203 can flow directly through the first guide section 233 to the first opening 201. The airflow process is smoother and the airflow speed is faster, thereby further improving the heat dissipation capacity of the battery module 10.

[0131] In some embodiments, the flange 232 includes a peripheral wall 2321, the peripheral wall 2321 is provided with a communication port 204, the communication port 204 connects the first air vent 203 and the first opening 201.

[0132] In some embodiments, the connection port 204 may be rectangular.

[0133] In other embodiments, the connection port 204 may also be circular, elliptical, or other shapes.

[0134] In some embodiments, the connecting port 204 is disposed on the side of the flange 232 in the second direction Y near the first opening 201, so that airflow can flow directly into the first opening 201.

[0135] The flange 232 includes a peripheral wall 2321, which has a connecting port 204. The connecting port 204 connects the first air vent 203 and the first opening 201, so that the airflow entering the battery module 10 from the first air vent 203 along the first direction X can change direction through the connecting port 204 to flow to the first opening 201.

[0136] In some embodiments, the battery cell assembly 100 includes a first battery cell 110 and a second battery cell 120 disposed adjacent to each other in a second direction Y, with a first gap 101 located between the first battery cell 110 and the second battery cell 120; the support 200 further includes a second airflow guide 234 and a third airflow guide 235, the second airflow guide 234 being connected to the first airflow guide 233, and the second airflow guide 234 and the third airflow guide 235 being configured to guide airflow to the first gap 101. This improves the heat dissipation effect of the airflow on the first battery cell 110 and the second battery cell 120, reducing the possibility of the first battery cell 110 and the second battery cell 120 overheating or even thermal runaway during charging and discharging.

[0137] In some embodiments, the first cell 110 may be located in the middle of the cell group 100 along the second direction Y. Since the heat of the cell located in the middle of the cell group 100 is difficult to dissipate after heating, the heat accumulation in the middle of the cell group 100 is the most serious. By providing the second guide section 234 and the third guide section 235, the airflow introduced by the first guide section 233 is guided to the first gap 101 between the first cell 110 and the second cell 120, which can enhance the heat dissipation effect of the first cell 110 and reduce the possibility of thermal runaway of the first cell 110.

[0138] In some embodiments, the second flow guide 234 and the third flow guide 235 can both be arranged in an arc shape, with the second flow guide 234 attached to the second battery cell 120 and the third flow guide 235 attached to the first battery cell 110.

[0139] By making both the second guide section 234 and the third guide section 235 arc-shaped, it is easier for the second guide section 234 to fit with the second battery cell 120 and the third guide section 235 to fit with the first battery cell 110. This also allows for a smoother transition of airflow introduced from the first guide section 233 between the second guide section 234 and the third guide section 235. By having the second guide section 234 fit with the second battery cell 120 and the third guide section 235 fit with the first battery cell 110, the distance between the second guide section 234 and the third guide section 235 is larger, allowing more airflow to be guided between the first battery cell 110 and the second battery cell 120, thus improving the heat dissipation effect on both cells.

[0140] In some embodiments, the second guide section 234 has a different bending direction than the first guide section 233, which facilitates the change of flow direction when the airflow flows through the first guide section 233, the second guide section 234 and the third guide section 235, making the flow smoother.

[0141] Referring also to Figure 7, in some embodiments, the support 200 further includes a fourth flow guide 236, at least a portion of which is located at the end of the support 200 opposite to the second direction Y. The fourth flow guide 236 is connected to the first flow guide 233. The fourth flow guide 236 forms a flow channel 205, which surrounds at least a portion of the end of the cell assembly 100 opposite to the second direction Y. The flow channel 205 also communicates with the outside of the battery module 10. In some embodiments, one end of the flow channel 205 has a fourth opening 206, through which airflow can flow into the flow channel 205 from the fourth opening 206, return after reaching the end of the flow channel 205 away from the fourth opening 206, and then flow out from the fourth opening 206 again.

[0142] By providing a fourth flow guide 236, at least a portion of the fourth flow guide 236 is located at the end of the bracket 200 in the opposite direction of the second direction Y. The fourth flow guide 236 is connected to the first flow guide 233. The fourth flow guide 236 forms a flow guide channel 205, which surrounds at least a portion of the end of the cell assembly 100 in the opposite direction of the second direction Y. The flow guide channel 205 is also connected to the outside of the battery module 10, allowing airflow to flow within the flow guide channel 205 to dissipate heat from at least a portion of the cell assembly 100 surrounded by the flow guide channel 205. Furthermore, at least a portion of the cell assembly surrounded by the flow guide channel 205 is not exposed in the first opening 201. By dissipating heat through the flow guide channel 205 and the first opening 201, the overall heat dissipation capacity of the battery module 10 is improved, and the possibility of thermal runaway during the charging and discharging process of the battery module 10 is lower.

[0143] In some embodiments, the battery pack 100 further includes a third battery cell 130 (11), which is disposed on the side of the second battery cell 120 (11) facing away from the first battery cell 110 along the second direction Y. The fourth flow guide 236 includes a first flow guide plate 2361, a second flow guide plate 2362 and a third flow guide plate 2363. The first flow guide plate 2361 is connected to the first flow guide 233 and the second flow guide 234 and is disposed in close contact with the second battery cell 120 (11). The second flow guide plate 2362 is connected to the first flow guide plate 2361 and is disposed in close contact with the third battery cell 130 (11). The third flow guide plate 2363 is connected at the junction of the first flow guide 233 and the flange 232. At least a portion of the third flow guide plate 2363 is spaced apart from the first flow guide plate 2361 and the second flow guide plate 2362 to form a flow guide channel 205. By making the airflow channel 205 disconnected from the first air vent 203, all the airflow entering from the first air vent 203 can flow to the first opening 201, which improves the heat dissipation effect on the first cell 110 (11) located in the middle of the battery module 10.

[0144] Referring to Figure 3, in some embodiments, the first opening 201 extends along the second direction Y, and in the second direction Y, the first opening 201 has a first end 2013 near the first guide portion 233 and a second end 2014 away from the first guide portion 233.

[0145] The first opening 201 extends along the second direction Y, so that the airflow entering the first opening 201 can dissipate heat from the multiple battery cells 11 exposed in the first opening 201. The heat dissipation range of the airflow is wider, and the overall heat dissipation capacity of the battery module 10 is stronger.

[0146] In some embodiments, the width of the first opening 201 in the third direction Z increases along the second direction Y.

[0147] The width of the first opening 201 in the third direction Z increases along the second direction Y, so that when the airflow flows from the first end 2013 to the second end 2014 of the first opening 201, the airflow covers a larger area, the heat dissipation range is wider, and the overall heat dissipation capacity of the battery module 10 is stronger.

[0148] In some embodiments, along the third direction Z, the first opening 201 has a first sidewall 211 and a second sidewall 221, the first sidewall 211 being parallel to the second direction Y, and the second sidewall 221 being inclined relative to the second direction Y.

[0149] Along the third direction Z, the first opening 201 has a first sidewall 211 and a second sidewall 221. By making the first sidewall 211 parallel to the second direction Y and the second sidewall 221 inclined relative to the second direction Y, the airflow flows along the second direction Y on the first sidewall 211 and travels a longer distance in the second direction Y to dissipate heat from more cells. At the same time, the airflow flows along the second sidewall 221 in a direction inclined relative to the second direction Y, so that while the airflow flows to the second end 2014 of the first opening 201, it can also flow to the third direction Z to dissipate heat from the surface of the cells exposed in the third direction Z, making the overall heat dissipation capacity of the battery module 10 stronger.

[0150] Referring to Figure 4, in some embodiments, the second opening 202 extends along the second direction Y.

[0151] The second opening 202 extends along the second direction Y, so that the airflow entering the second opening 202 can dissipate heat on the multiple cells exposed in the second opening 202. The heat dissipation range of the airflow is wider, and the overall heat dissipation capacity of the battery module 10 is stronger.

[0152] Referring also to Figure 8, in some embodiments, the second opening 202 includes a first sub-opening 2021 and a second sub-opening 2022. In the first direction X, the projection of the first sub-opening 2021 overlaps with that of the first opening 201, and the second sub-opening 2022 extends in the opposite direction of the second direction Y. In the third direction Z, the width W3 of the first sub-opening 2021 is greater than the width W4 of the second sub-opening 2022.

[0153] In some embodiments, the first sub-opening 2021 and the second sub-opening 2022 may be arranged in a square shape.

[0154] In other embodiments, the first sub-opening 2021 and the second sub-opening 2022 may also be arranged in the shape of a circle, an ellipse, a racetrack, etc.

[0155] In some embodiments, when the first sub-opening 2021 and the second sub-opening 2022 are arranged in an irregular shape, the first sub-opening 2021 or the second sub-opening 2022 can be divided into 10 segments along the second direction Y. Then, the width of each of the 10 segments along the third direction Z at both ends of the second direction Y is measured, resulting in a total of 11 values. The average of the 11 values ​​is taken as the width of the first sub-opening 2021 or the second sub-opening 2022.

[0156] The second opening 202 includes a first sub-opening 2021 and a second sub-opening 2022. In the first direction X, the projection of the first sub-opening 2021 overlaps with that of the first opening 201. The second sub-opening 2022 extends in the opposite direction of the second direction Y, allowing airflow to directly reach the first sub-opening 2021 through the first opening 201 and the first gap 101, thereby dissipating heat from the battery cell whose projection overlaps with that of the first sub-opening 2021 and the first opening 201 along the first direction X. Since the projection of the first sub-opening 2021 overlaps with that of the first opening 201 in the first direction X, airflow flows from the first opening 201 and the first gap 101 to the support 2. After the side of the bracket 200 with the second opening 202 is provided, it is easier for the air to flow into the first sub-opening 2021, but it is difficult for the air to flow into the second sub-opening 2022. In this application, the width of the first sub-opening 2021 is greater than the width of the second sub-opening 2022 along the third direction Z. This allows the airflow reaching the side of the bracket 200 with the second opening 2022 to flow at a speed greater than that in the first sub-opening 2021. This makes it easier for the airflow to flow into the second sub-opening 2022, thereby enabling heat dissipation of the battery cell exposed in the second sub-opening 2022 along the first direction X, and making the overall heat dissipation capacity of the battery module 10 stronger.

[0157] Referring to Figure 1, in some embodiments, the support 200 includes a first support 210 and a second support 220, the second support 220 and the first support 210 being arranged along a third direction Z to form a first opening 201 and a second opening 202.

[0158] In some embodiments, the first opening 201 and the second opening 202 may be formed by the first bracket 210 being recessed in the third direction Z and the second bracket 220 being recessed in the opposite direction Z.

[0159] In other embodiments, the first opening 201 and the second opening 202 may also be formed by the recess of the first support 210 or the second support 220.

[0160] The bracket 200 includes a first bracket 210 and a second bracket 220. The second bracket 220 and the first bracket 210 are arranged along the third direction Z to form a first opening 201 and a second opening 202, which facilitates the assembly of the battery cell assembly 100 with the bracket 200.

[0161] Referring to Figures 9 to 11, this application embodiment provides a battery pack 20, which includes a battery module 10 and a housing 300 provided in any of the above embodiments. The housing 300 includes a first housing portion 310 and a second housing portion 320 opposite to each other in a first direction X. The first housing portion 310 is provided with a first through hole 301, and the second housing portion 320 is provided with a second through hole 302. Both the first through hole 301 and the second through hole 302 communicate with the outside of the battery pack 20. The battery module 10 is disposed inside the housing 300. In the first direction X, a first opening 201 is opposite to the first housing portion 310, and a second opening 202 is opposite to the second housing portion 320. The first opening 201 communicates with the first through hole 301, and the second opening 202 communicates with the second through hole 302.

[0162] In some embodiments, the first through hole 301 may be square.

[0163] In other embodiments, the first through hole 301 may also be arranged in a circular, elliptical, or racetrack shape.

[0164] In some embodiments, the second through hole 302 may be circular.

[0165] In other embodiments, the second through hole 302 may also be rectangular, elliptical, racetrack-shaped, or other similar shapes.

[0166] In some embodiments, the number of second through holes 302 can be multiple, and the multiple second through holes 302 are respectively arranged at intervals along the second direction Y and the third direction Z, which can facilitate the airflow from the second through holes 302, increase the airflow speed, and thereby improve the heat dissipation capacity of the battery pack 20.

[0167] The battery pack 20 includes a housing 300 and a battery module 10. The battery module 10 is disposed inside the housing 300, so that the housing 300 can provide support and protection for the battery module 10, so that the battery module 10 remains stable during charging and discharging, and reduces the possibility of damage to the battery module 10 due to external forces. The outer casing 300 includes a first casing portion 310 and a second casing portion 320 opposite each other in the first direction X. The first casing portion 310 is provided with a first through hole 301, and the second casing portion 320 is provided with a second through hole 302. Both the first through hole 301 and the second through hole 302 are connected to the outside of the battery pack 20. In the first direction X, a first opening 201 is disposed opposite to the first casing portion 310, and a second opening 202 is disposed opposite to the second casing portion 320. The first opening 201 is connected to the first through hole 301, and the second opening 202 is connected to the second through hole 302. This allows the first through hole 301, the first opening 201, the first gap 101, the second opening 202, and the second through hole 302 to form a heat dissipation channel connected to the outside of the battery pack 20. Gas can dissipate heat to the cell assembly 100 through the heat dissipation channel, thereby improving the heat dissipation capacity of the battery pack 20, reducing the possibility of thermal runaway during the charging and discharging process of the battery pack 20, and extending the service life of the battery pack 20.

[0168] Referring also to Figure 12, in some embodiments, the second housing portion 320 is further provided with a third through hole 303, which communicates with the outside of the battery pack 20. The third through hole 303 is located at the end of the second housing portion 320 and communicates with the outside of the battery module 10; the second direction Y is perpendicular to the first direction X.

[0169] In some embodiments, the third through hole 303 may be circular.

[0170] In other embodiments, the third through hole 303 may also be rectangular, elliptical, racetrack-shaped, or other similar shapes.

[0171] The second housing 320 is also provided with a third through hole 303, which communicates with the outside of the battery pack 20. The third through hole 303 is located at the end of the second housing 320 and communicates with the outside of the battery module 10, so that the airflow inside the housing 300 can flow out through the third through hole 303, thereby dissipating heat from the battery cells located at the end of the cell assembly 100 along the second direction Y, making the overall heat dissipation capacity of the battery module 10 stronger.

[0172] In some embodiments, along the first direction X, the projection of the third through hole 303 overlaps with the projection of the guide channel 205, so that the airflow entering the battery pack 20 from the third through hole 303 can flow directly to the guide channel 205, and the airflow in the guide channel 205 can flow out of the battery pack 20 through the third through hole 303. The airflow process is smoother, and the airflow speed is faster, thereby further improving the heat dissipation capacity of the battery pack 20.

[0173] In some embodiments, along the first direction X, the projection of the third through hole 303 overlaps with the projection of the flow channel 205. This overlap could be partial, the projection of the third through hole 303 could be within the projection of the flow channel 205, or the projection of the flow channel 205 could be within the projection of the third through hole 303.

[0174] In some embodiments, the number of third through holes 303 can be multiple, and the multiple third through holes 303 are respectively arranged at intervals along the third direction Z, which can facilitate the flow of air into and out of the second through hole 302, increase the airflow speed, and thereby improve the heat dissipation capacity of the battery pack 20.

[0175] In some embodiments, the bracket 200 is provided with a first air vent 203, which is connected to a first opening 201 and a first through hole 301 respectively; along the first direction X, the projection of the first air vent 203 overlaps with the projection of the first through hole 301.

[0176] In some embodiments, along the first direction X, the projection of the first air vent 203 overlaps with the projection of the first through hole 301. This overlap could be partial, the projection of the first through hole 301 could be within the projection of the first air vent 203, or the projection of the first air vent 203 could be within the projection of the first through hole 301.

[0177] The bracket 200 is provided with a first air vent 203, which is connected to the first opening 201 and the first through hole 301 respectively. Along the first direction X, the projection of the first air vent 203 overlaps with the projection of the first through hole 301, so that the airflow entering the battery pack 20 from the first through hole 301 can flow directly to the inside of the battery module 10 through the first air vent 203. The airflow process is smoother and the airflow speed is faster, thereby further improving the heat dissipation capacity of the battery pack 20.

[0178] Referring also to Figures 13 and 14, in some embodiments, the battery pack 20 further includes a circuit board 400, which is electrically connected to the cell assembly 100; along the first direction X, the circuit board 400 is disposed between the bracket 200 and the first housing portion 310, and the circuit board 400 is provided with a third opening 401, and along the first direction X, the projection of the third opening 401 overlaps with the projection of the first air vent 203.

[0179] In some embodiments, along the first direction X, the projection of the third opening 401 overlaps with the projection of the first air vent 203. This can be either the projection of the third opening 401 overlaps with the first air vent 203, or the projection of the first air vent 203 is within the projection of the third opening 401.

[0180] In some embodiments, the circuit board may include a printed circuit board (PCB).

[0181] In other embodiments, the circuit board may also include a flexible printed circuit (FPC).

[0182] By setting up a circuit board 400, which is electrically connected to the cell assembly 100, the circuit board 400 can be used to control the charging and discharging of multiple cells in the cell assembly 100. Along the first direction X, the circuit board 400 is disposed between the bracket 200 and the first housing 310. The circuit board 400 is provided with a third opening 401. Along the first direction X, the projection of the third opening 401 overlaps with the projection of the first air vent 203, so that the airflow entering the battery pack 20 from the first through hole 301 can flow directly into the interior of the battery module 10 through the first air vent 203, reducing the possibility of the circuit board 400 obstructing the airflow.

[0183] Referring to Figures 12 and 15, in some embodiments, the circuit board 400 is spaced apart from the first opening 201 to form a second gap 102, which communicates with the first air vent 203.

[0184] By spacing the circuit board 400 from the first opening 201 to form a second gap 102, which is connected to the first air vent 203, the airflow flowing into the battery module 10 through the first air vent 203 can also flow within the second gap 102. This allows more gas to flow into the battery module 10 through the first air vent 203, improving the heat dissipation effect on the cell assembly 100 and also dissipating heat from the circuit board 400, thereby enhancing the overall heat dissipation capacity of the battery pack 20.

[0185] Referring to Figure 14, in some embodiments, the circuit board 400 includes a first conductive terminal 410 and a second conductive terminal 420. Both the first conductive terminal 410 and the second conductive terminal 420 are disposed on the surface of the circuit board 400 opposite to the support 200, and are configured to input and output electrical energy to the battery pack 20. Along the first direction X, the projection of the first conductive terminal 410 overlaps with the projection of the first opening 201, and / or, along the first direction X, the projection of the second conductive terminal 420 overlaps with the projection of the first opening 201.

[0186] In some embodiments, along the first direction X, the projection of the first conductive terminal 410 overlaps with the projection of the first opening 201. This overlap could be partial or within the projection of the first conductive terminal 410.

[0187] In some embodiments, along the first direction X, the projection of the second conductive terminal 420 overlaps with the projection of the first opening 201. This overlap could be partial or within the projection of the first opening 201.

[0188] By providing a first conductive terminal 410 and a second conductive terminal 420, both of which are located on the surface of the circuit board 400 facing away from the support 200, it is convenient for the first conductive terminal 410 and the second conductive terminal 420 to connect with other mechanisms. The first conductive terminal 410 and the second conductive terminal 420 are configured to input and output electrical energy from the battery pack 20, enabling the battery pack 20 to provide electrical energy to other mechanisms. Since the first conductive terminal 410 and the second conductive terminal 420 also generate heat during operation, by ensuring that the projection of the first conductive terminal 410 overlaps with the projection of the first opening 201 along the first direction X, and / or that the projection of the second conductive terminal 420 overlaps with the projection of the first opening 201 along the first direction X, the airflow through the first opening 201 can dissipate heat from at least one of the first conductive terminal 410 and the second conductive terminal 420, reducing the possibility of the circuit board 400 overheating or even thermal runaway.

[0189] Referring to Figures 3 and 14, in some embodiments, the first opening 201 includes a first region 2011 and a second region 2012 arranged along the second direction Y. Along the third direction Z, the width of the second region 2012 is greater than the width of the first region 2011. The dashed line in Figure 14 represents the boundary between the first region 2011 and the second region 2012. Along the first direction X, the projection of the first conductive terminal 410 overlaps with the projection of the second region 2012, and / or, along the first direction X, the projection of the second conductive terminal 420 overlaps with the projection of the second region 2012.

[0190] In some embodiments, along the first direction X, the projection of the first conductive terminal 410 overlaps with the projection of the second region 2012. This overlap could be partial or within the projection of the second region 2012.

[0191] In some embodiments, along the first direction X, the projection of the second conductive terminal 420 overlaps with the projection of the second region 2012. This overlap could be partial or within the projection of the second conductive terminal 420.

[0192] In some embodiments, there is a smooth transition between the first region 2011 and the second region 2012, which facilitates the flow of air along the second direction Y and makes the airflow less likely to be blocked.

[0193] In some other embodiments, a step may also be formed between the first region 2011 and the second region 2012, similar to the structure of the second opening 202, which will not be described in detail here.

[0194] By making the width of the second region 2012 greater than the width of the first region 2011 along the third direction Z, and by making the projection of the first conductive terminal 410 overlap with the projection of the second region 2012 along the first direction X, and / or making the projection of the second conductive terminal 420 overlap with the projection of the second region 2012 along the first direction X, the airflow of the second region 2012 is increased, resulting in better heat dissipation for at least one of the first conductive terminal 410 and the second conductive terminal 420, further reducing the possibility of the circuit board 400 overheating or even thermal runaway.

[0195] Referring to Figures 11, 13, and 16, in some embodiments, the battery pack 20 further includes an electrical connector 500 connecting at least two battery cells. The electrical connector 500 includes a first portion 510 and a second portion 520, which are connected. In the first direction X, the first portion 510 is disposed between the bracket 200 and the first housing portion 310, and the first portion 510 is connected to the circuit board 400. In the third direction Z, the second portion 520 is disposed between the bracket 200 and the second housing portion 320, and the second portion 520 is connected to the battery cell 11.

[0196] In the battery pack 20, multiple cells can be connected in series, parallel, or in a mixed manner. A mixed connection means that multiple cells are connected in both series and parallel. Multiple cells can be directly connected in series, parallel, or in a mixed manner to form a cell group; of course, multiple cells can also be connected in series, parallel, or in a mixed manner to form a cell group.

[0197] In some embodiments, the electrical connector 500 is made of copper.

[0198] In some embodiments, the electrical connector 500 is configured to collect electrical signal information of the battery cell, including but not limited to voltage, current, resistance, and temperature.

[0199] In some embodiments, the first part 510 and the circuit board 400 can be connected by welding, and the second part 520 and the battery cell 11 can be connected by welding, such as laser welding or ultrasonic welding.

[0200] By providing an electrical connector 500, at least two battery cells can be connected to each other, allowing multiple battery cells to be connected in series or parallel. The electrical connector 500 includes a first part 510 and a second part 520, which are connected together. In the first direction X, the first part 510 is located between the bracket 200 and the first housing 310, and is connected to the circuit board 400. In the third direction Z, the second part 520 is located between the bracket 200 and the second housing 320, and is connected to the battery cell 11, so that the circuit board 400 can be electrically connected to multiple battery cells 11 through the first part 510 and the second part 520. Furthermore, the first part 510 also provides support for the circuit board 400, keeping it spaced from the first opening 201. At the same time, the first part 510 also limits the movement of the circuit board 400, making it less likely for the circuit board 400 to shift relative to the bracket 200, thus making the overall structure of the battery pack 20 more stable.

[0201] In some embodiments, the electrical connector 500 includes a third portion 530 connected between the first portion 510 and the second portion 520.

[0202] In some embodiments, the battery pack 20 may further include a support member 237 disposed on the first bracket 210 and / or the second bracket 220, the support member 237 abutting against the circuit board 400 for supporting the circuit board 400 such that the circuit board 400 is spaced from the first opening 201.

[0203] Referring to Figure 17, in some embodiments, a first limiting protrusion 321 is provided on the inner side of the second shell 320, and a second limiting protrusion 238 is provided on the outer side of the bracket 200. The first limiting protrusion 321 and the second limiting protrusion 238 cooperate to limit the battery module 10 in the second direction Y, which makes the battery module 10 less likely to shake inside the shell 300, and the overall structure of the battery pack 20 is more stable.

[0204] Referring to Figure 18, some embodiments of this application provide an electrical device 1, including a load 30 and a battery module 10 provided in any of the above embodiments, wherein the battery module 10 supplies power to the load 30.

[0205] Referring to Figure 19, some other embodiments of this application provide an electrical device 1, including a load 30 and a battery pack 20 provided in any of the above embodiments, wherein the battery pack 20 supplies power to the load 30.

[0206] Referring to Figure 20, some other embodiments of this application provide an electrical device 1, including a load 30 and a battery pack 20 provided in any of the above embodiments. The battery pack 20 includes a battery module 10 provided in any of the above embodiments, and the battery pack 20 supplies power to the load 30.

[0207] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other.

[0208] The above are merely preferred embodiments of this application and are not intended to limit this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A battery module, characterized by, include: A battery cell assembly includes multiple battery cells, with a first gap formed between the multiple battery cells; The bracket houses the battery cell assembly. The bracket has a first opening on one side in a first direction and a second opening on the opposite side in the first direction. Both the first opening and the second opening communicate with the outside of the battery module and are connected through the first gap.

2. The battery module of claim 1, wherein, The bracket has a first flow guide on one side in the first direction, and the first flow guide is configured to guide airflow to the first opening.

3. The battery module of claim 2, wherein, The first guide section is arranged in an arc shape.

4. The battery module according to claim 2 or 3, characterized in that, The bracket includes a main body and a flange. The first opening is located on one side of the main body in the first direction, and the second opening is located on the side of the main body in the opposite direction to the first direction. The flange is located on one side of the main body in the first direction and extends along the first direction. The flange forms a first air vent, and the first air vent communicates with the first opening. Along the first direction, the projection of the first air guide overlaps with the projection of the first air vent.

5. The battery module of claim 4, wherein, The flange includes a peripheral wall, which has a connecting opening that connects the first air vent and the first opening.

6. The battery module of any one of claims 2-5, wherein, The battery cell assembly includes a first battery cell and a second battery cell arranged adjacent to each other in a second direction, and the first gap is located between the first battery cell and the second battery cell; The support also includes a second flow guide and a third flow guide, the second flow guide being connected to the first flow guide, and the second flow guide and the third flow guide being configured to guide airflow to the first gap; The second direction is perpendicular to the first direction.

7. The battery module of claim 6, wherein, The support also includes a fourth flow guide, at least a portion of which is disposed at the end of the support opposite to the second direction, and the fourth flow guide is connected to the first flow guide. The fourth flow guide portion forms a flow guide channel, which surrounds at least a portion of the end of the cell assembly in the opposite direction to the second direction, and the flow guide channel is also connected to the outside of the battery module.

8. The battery module of any one of claims 2-7, wherein, The first opening extends along a second direction, in which the first opening has a first end close to the first guide portion and a second end away from the first guide portion; The width of the first opening in the third direction increases along the second direction; The third direction, the first direction, and the second direction are perpendicular to each other.

9. The battery module of claim 8, wherein, Along the third direction, the first opening has a first sidewall and a second sidewall, the first sidewall being parallel to the second direction and the second sidewall being inclined relative to the second direction.

10. The battery module according to claim 8 or 9, characterized in that, The second opening extends along the second direction.

11. The battery module of claim 10, wherein, The second opening includes a first sub-opening and a second sub-opening. In the first direction, the projection of the first sub-opening overlaps with that of the first opening, and the second sub-opening extends in the opposite direction to the second direction. Along a third direction, the width of the first sub-opening is greater than the width of the second sub-opening; The third direction, the first direction, and the second direction are perpendicular to each other.

12. The battery module of any one of claims 1-11, wherein, The bracket includes a first bracket and a second bracket, the second bracket and the first bracket being arranged along a third direction to form the first opening and the second opening; The third direction is perpendicular to the first direction.

13. The battery module of any one of claims 1-12, wherein, The battery cell is a cylindrical battery cell.

14. A battery pack comprising a battery module as described in any one of claims 1-13, wherein the battery pack further comprises: The outer casing includes a first shell portion and a second shell portion opposite to each other in the first direction. The first shell portion is provided with a first through hole, and the second shell portion is provided with a second through hole. Both the first through hole and the second through hole communicate with the outside of the battery pack. The battery module is disposed inside the housing; In the first direction, the first opening is disposed opposite to the first shell portion, the second opening is disposed opposite to the second shell portion, the first opening communicates with the first through hole, and the second opening communicates with the second through hole.

15. The battery pack of claim 14, wherein, The second housing portion is also provided with a third through hole, which communicates with the outside of the battery pack. The third through hole is located at the end of the second housing portion and communicates with the outside of the battery module. The second direction is perpendicular to the first direction.

16. The battery pack of claim 15, wherein, The bracket further includes a fourth flow guide portion forming a flow guide channel, the flow guide channel surrounding at least a portion of the end of the cell assembly in the opposite direction to the second direction, and the flow guide channel also communicating with the outside of the battery module; Along the first direction, the projection of the third through hole overlaps with the projection of the flow guiding channel.

17. The battery pack of claim 14, wherein, The bracket is provided with a first air vent, which is connected to the first opening and the first through hole respectively. Along the first direction, the projection of the first air vent overlaps with the projection of the first through hole.

18. The battery pack of claim 17, wherein, The battery pack also includes a circuit board, which is electrically connected to the battery cell assembly. Along the first direction, the circuit board is disposed between the bracket and the first housing portion. The circuit board has a third opening, and along the first direction, the projection of the third opening overlaps with the projection of the first air vent.

19. The battery pack of claim 18, wherein, The circuit board is spaced apart from the first opening to form a second gap, which is connected to the first air vent.

20. The battery pack of claim 18, wherein, The circuit board includes a first conductive terminal and a second conductive terminal; The first conductive terminal and the second conductive terminal are both disposed on the surface of the circuit board away from the bracket, and the first conductive terminal and the second conductive terminal are configured to input and output the electrical energy of the battery pack; Along the first direction, the projection of the first conductive terminal overlaps with the projection of the first opening, and / or, along the first direction, the projection of the second conductive terminal overlaps with the projection of the first opening.

21. The battery pack of claim 20, wherein, The first opening includes a first region and a second region arranged along a second direction, wherein the width of the second region is greater than the width of the first region along a third direction; Along the first direction, the projection of the first conductive terminal overlaps with the projection of the second region, and / or, along the first direction, the projection of the second conductive terminal overlaps with the projection of the second region; The third direction, the second direction, and the first direction are perpendicular to each other.

22. The battery pack of claim 18, wherein, The battery pack also includes an electrical connector that connects at least two of the battery cells; The electrical connector includes a first part and a second part, and the first part and the second part are connected. In the first direction, the first portion is disposed between the bracket and the first housing portion, and the first portion is connected to the circuit board; In the third-party direction, the second part is disposed between the bracket and the second housing, and the second part is connected to the battery cell; Wherein, the first direction is perpendicular to the third direction.

23. An electrical device, comprising: The device includes a load and a battery module as described in any one of claims 1 to 13 or a battery pack as described in any one of claims 14 to 22, wherein the battery module or the battery pack supplies power to the load.

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