Battery module, battery pack and electric device

Abstract

The invention provides a battery module, a battery pack and a power utilization device, the battery module comprises a battery cell group and a bracket, the battery cell group comprises a plurality of battery cells, and first gaps are formed among the plurality of battery cells; the bracket accommodates the battery cell group, a first opening is formed in one side of the bracket in a first direction, a second opening is formed in one side of the bracket in a direction opposite to the first direction, the first opening and the second opening are communicated with the outside of the battery module, and the first opening and the second opening are communicated through a first gap.

Description

Technical Field

[0001] The present application relates to the field of battery technology, and in particular to a battery module, a battery pack and an electrical device. Background Art

[0002] When the battery module is used under continuous charge and discharge conditions, the battery module temperature may be too high, which may cause thermal runaway of the battery module and affect the normal use of electrical devices. Summary of the invention

[0003] The present application provides a battery module, a battery pack and an electrical device, which can improve the heat dissipation capacity of the battery module.

[0004] In a first aspect, the present application provides a battery module, comprising:

[0005] A battery cell group, comprising a plurality of battery cells, wherein a first gap is formed between the plurality of battery cells;

[0006] A bracket is used to accommodate the battery cell group. The bracket is provided with a first opening on one side of a first direction and a second opening on the side opposite to the first direction. The first opening and the second opening are both connected to the outside of the battery module. The first opening and the second opening are connected through the first gap.

[0007] In the above technical scheme, the battery module includes a cell group and a bracket, the cell group includes multiple cells, which can make the capacity of the battery module larger; the bracket accommodates the cell group, which can support and protect the cell group, so that the cell group remains stable during the charging and discharging process, and reduces the possibility of the cell group being damaged by external force; the bracket is provided with a first opening on one side of the first direction, and a second opening on the side opposite to the first direction, the first opening and the second opening are both connected to the outside of the battery module, the first opening and the second opening are connected through a first gap, so that the first opening, the first gap and the second opening form a heat dissipation channel connected to the outside of the battery module, the heat of the cell can be dissipated to the outside of the battery module, and the gas can dissipate the heat of the cell group through the heat dissipation channel, thereby improving the heat dissipation capacity of the battery module, reducing the possibility of thermal runaway of the battery module during the charging and discharging process, and extending the service life of the battery module.

[0008] In one or more embodiments of the first aspect, the bracket is provided with a first air guide portion on one side of the first direction, and the first air guide portion is configured to guide the airflow to the first opening.

[0009] In the above technical solution, by arranging a first guide portion on one side of the bracket along the first direction, and making the first guide portion configured 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 portion, and then flow to the second opening through the first gap, so as to guide the airflow into the first opening, increase the airflow flow and speed of the first opening, and further improve the heat dissipation capacity of the battery module.

[0010] In one or more embodiments of the first aspect, the first guide portion is arranged in an arc shape.

[0011] In the above technical solution, by making the first guide portion arc-shaped, the airflow entering the battery module along the first direction can be changed direction through the first guide portion 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 flow speed of the airflow is faster, thereby further improving the heat dissipation capacity of the battery module.

[0012] In one or more embodiments of the first aspect, the bracket includes a main body and a flange, the first opening is provided on one side of the main body in the first direction, the second opening is provided on one side of the main body in the opposite direction of the first direction, the flange is provided on one side of the main body in the first direction and extends along the first direction, the flange encloses a first air outlet, and the first air outlet is connected to the first opening;

[0013] Along the first direction, a projection of the first air guide portion overlaps with a projection of the first air outlet.

[0014] In the above technical solution, the bracket includes a main body and a flange, the first opening is arranged on one side of the main body in a first direction, the second opening is arranged on one side of the main body in the opposite direction of the first direction, the flange is arranged on one side of the main body in the first direction and extends along the first direction, the flange surrounds a first air outlet, and the first air outlet is connected to the first opening; along the first direction, the projection of the first guide portion overlaps with the projection of the first air outlet, so that the airflow entering the battery module from the first air outlet can directly flow to the first opening through the first guide portion, the flow process of the airflow is smoother, and the flow speed of the airflow can be made faster, thereby further improving the heat dissipation capacity of the battery module.

[0015] In one or more embodiments of the first aspect, the flange includes a peripheral wall, the peripheral wall is provided with a communication port, and the communication port is connected with the first air port and the first opening.

[0016] In the above technical solution, the flange includes a peripheral wall, which is provided with a connecting port, which connects the first air port and the first opening, so that the airflow entering the battery module from the first air port along the first direction can change direction through the connecting port to flow to the first opening.

[0017] In one or more embodiments of the first aspect, the battery cell group includes a first battery cell and a second battery cell adjacently arranged in a second direction, and the first gap is located between the first battery cell and the second battery cell;

[0018] The bracket also includes a second guide portion and a third guide portion, the second guide portion is connected to the first guide portion, and the second guide portion and the third guide portion are configured to guide the airflow to the first gap; the second direction is perpendicular to the first direction.

[0019] In the above technical solution, the battery cell group 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 bracket also includes a second guide portion and a third guide portion, the second guide portion is connected to the first guide portion, and the second guide portion and the third guide portion are configured to guide the 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, which can reduce the possibility of the first battery cell and the second battery cell being overheated or even causing thermal runaway during the charging and discharging process.

[0020] In one or more embodiments of the first aspect, the bracket further includes a fourth guide portion, at least a portion of the fourth guide portion is disposed at an end of the bracket in a direction opposite to the second direction, and the fourth guide portion is connected to the first guide portion;

[0021] The fourth guide portion forms a guide channel, and the guide channel surrounds at least a portion of an end portion of the battery cell group in a direction opposite to the second direction. The guide channel is also connected to the outside of the battery module.

[0022] In the above technical solution, the bracket also includes a fourth guide portion, at least part of the fourth guide portion is arranged at the end of the bracket in the opposite direction of the second direction, and the fourth guide portion is connected to the first guide portion; the fourth guide portion forms a guide channel, and the guide channel surrounds at least part of the end of the battery cell group in the opposite direction of the second direction. The guide channel is also connected to the outside of the battery module, so that air can flow in the guide channel to dissipate heat for at least part of the battery cell group surrounded by the guide channel, and at least part of the battery cell group surrounded by the guide channel is not exposed in the first opening. Heat is dissipated through the guide channel and the first opening, which is beneficial to improving the overall heat dissipation capacity of the battery module, and the possibility of thermal runaway of the battery module during charging and discharging is lower.

[0023] In one or more embodiments of the first aspect, the first opening extends along a second direction, and in the second direction, the first opening has a first end close to the first flow guide portion and a second end away from the first flow guide portion;

[0024] The width of the first opening in the third direction increases along the second direction;

[0025] The third direction, the first direction, and the second direction are perpendicular to each other.

[0026] In the above technical solution, the first opening extends along the second direction, so that the airflow entering the first opening can dissipate heat for the multiple battery cells exposed to the first opening, the heat dissipation range of the airflow is wider, and the overall heat dissipation capacity of the battery module is stronger. The width of the first opening in the third direction increases along the second direction, so that when the airflow flows from the first end to the second end of the first opening, the airflow covers a larger range, the heat dissipation range is wider, and the overall heat dissipation capacity of the battery module is stronger.

[0027] In one or more embodiments of the first aspect, along the third direction, the first opening has a first side wall and a second side wall, the first side wall is parallel to the second direction, and the second side wall is inclined relative to the second direction.

[0028] In the above technical solution, along the third direction, the first opening has a first side wall and a second side wall, the first side wall is parallel to the second direction, and the second side wall is inclined relative to the second direction, so that the airflow flows along the second direction on the first side wall, and flows a longer distance in the second direction to dissipate heat to more battery cells; at the same time, the airflow flows along the direction inclined relative to the second direction on the second side wall, so that the airflow can flow toward the second end of the first opening while also flowing toward the third direction to dissipate heat to the end of the battery cell in the third direction, so that the overall heat dissipation capacity of the battery module is stronger.

[0029] In one or more embodiments of the first aspect, the second opening extends along the second direction.

[0030] In the above technical solution, the second opening extends along the second direction, so that the airflow entering the second opening can dissipate heat for the multiple battery cells exposed to the second opening. The heat dissipation range of the airflow is wider and the overall heat dissipation capacity of the battery module is stronger.

[0031] In one or more embodiments of the first aspect, the second opening includes a first sub-opening and a second sub-opening, in the first direction, the first sub-opening overlaps with a projection of the first opening, and the second sub-opening extends in a direction opposite to the second direction;

[0032] Along the third direction, the width of the first sub-opening is greater than the width of the second sub-opening;

[0033] The third direction, the first direction, and the second direction are perpendicular to each other.

[0034] 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, and the second sub-opening extends in the opposite direction of the second direction, so that the airflow can directly reach the first sub-opening through the first opening and the first gap, so as to dissipate heat to the battery cell that overlaps with the projection of the first sub-opening and the projection of the first opening in the first direction; and 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 provided, it is easier to flow in the first sub-opening, and difficult to flow to the second sub-opening. In the present application, the width of the first sub-opening is greater than that of the second sub-opening along the third direction, so that the airflow reaching the side of the bracket where the second opening is provided can flow at a faster speed in the second sub-opening than in the first sub-opening, thereby making it easier for the airflow to flow in the second sub-opening, and thus being able to dissipate heat to the battery cell exposed to the second sub-opening along the first direction, so that the overall heat dissipation capacity of the battery module is stronger.

[0035] In one or more embodiments of the first aspect, the bracket includes a first bracket and a second bracket, and the second bracket and the first bracket are arranged along a third direction to form the first opening and the second opening;

[0036] The third direction is perpendicular to the first direction.

[0037] In the above technical solution, the bracket includes a first bracket and a second bracket, and the second bracket and the first bracket are arranged along the third direction to form a first opening and a second opening, which facilitates the assembly of the battery cell group and the bracket.

[0038] In one or more embodiments of the first aspect, the battery cell is a cylindrical battery cell.

[0039] In a second aspect, the present application provides a battery pack, comprising the battery module as described above, and the battery pack further comprises:

[0040] A housing, comprising a first housing portion and a second housing portion opposite to each other in the first direction, the first housing portion being provided with a first through hole, the second housing portion being provided with a second through hole, and both the first through hole and the second through hole being in communication with the outside of the battery pack;

[0041] The battery module is disposed in the housing;

[0042] Wherein, in the first direction, the first opening is arranged opposite to the first shell portion, the second opening is arranged opposite to the second shell portion, the first opening is communicated with the first through hole, and the second opening is communicated with the second through hole.

[0043] In the above technical solution, the battery pack includes a shell and a battery module, and the battery module is arranged in the shell, so that the shell can play a supporting and protective role for the battery module, so that the battery module remains stable during the charging and discharging process, and the risk of the battery module being damaged by external force is reduced; 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, and the first through hole and the second through hole are both connected to the outside of the battery pack. In the first direction, the first opening is arranged opposite to the first shell portion, and the second opening is arranged 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, so that 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, and the gas can dissipate the heat to the battery cell group through the heat dissipation channel, thereby improving the heat dissipation capacity of the battery pack, reducing the possibility of thermal runaway of the battery pack during the charging and discharging process, and extending the service life of the battery pack.

[0044] In one or more embodiments of the second aspect, the second shell portion is further provided with a third through hole, which is connected to the outside of the battery pack, and the third through hole is located at the end of the second shell portion, and the third through hole is connected to the outside of the battery module; the second direction is perpendicular to the first direction.

[0045] In the above technical solution, the second shell portion 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 portion, and is connected to the outside of the battery module, so that the air flow in the outer shell can flow out through the third through hole, thereby dissipating the heat of the battery cell located at the end of the battery cell group along the second direction, so that the overall heat dissipation capacity of the battery module is stronger.

[0046] In one or more embodiments of the second aspect, the bracket also includes a fourth guide portion, which forms a guide channel, and the guide channel surrounds at least a portion of the end of the battery cell group in the opposite direction of the second direction, and the guide channel is also connected to the outside of the battery module; along the first direction, the projection of the third through hole overlaps with the projection of the guide channel.

[0047] 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 flow process of the airflow is smoother, and the flow speed of the airflow can be made faster, thereby further improving the heat dissipation capacity of the battery pack.

[0048] In one or more embodiments of the second aspect, the bracket is provided with a first air outlet, which is respectively connected to the first opening and the first through hole; along the first direction, the projection of the first air outlet overlaps with the projection of the first through hole.

[0049] In the above technical solution, the bracket is provided with a first air outlet, which is respectively connected to the first opening and the first through hole; along the first direction, the projection of the first air outlet overlaps with the projection of the first through hole, so that the airflow entering the battery pack from the first through hole can directly flow to the interior of the battery module through the first air outlet, and the flow process of the airflow is smoother, which can make the flow speed of the airflow faster, thereby further improving the heat dissipation capacity of the battery pack.

[0050] In one or more embodiments of the second aspect, the battery pack also includes a circuit board, which is electrically connected to the battery cell group; along the first direction, the circuit board is arranged between the bracket and the first shell portion, and the circuit board is provided with a third opening, and along the first direction, the projection of the third opening overlaps with the projection of the first air outlet.

[0051] In the above technical solution, the battery pack also includes a circuit board, which is electrically connected to the battery cell group, so that the circuit board can be used to control the charging and discharging of multiple battery cells in the battery cell group; along the first direction, the circuit board is arranged between the bracket and the first shell portion, 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 outlet, so that the airflow entering the battery pack from the first through hole can directly flow to the interior of the battery module through the first air outlet, reducing the possibility of the circuit board blocking the airflow.

[0052] In one or more embodiments of the second aspect, the circuit board is spaced apart from the first opening to form a second gap, and the second gap is communicated with the first air outlet.

[0053] In the above technical solution, the circuit board is spaced apart from the first opening to form a second gap, and the second gap is connected to the first air outlet, so that the air flow flowing into the battery module through the first air outlet can also flow in the second gap, so that more gas can flow into the battery module through the first air outlet, thereby improving the heat dissipation effect of the battery cell group and also realizing the heat dissipation of the circuit board, thereby making the overall heat dissipation capacity of the battery pack stronger.

[0054] In one or more embodiments of the second aspect, the circuit board includes a first conductive terminal and a second conductive terminal; the first conductive terminal and the second conductive terminal are both arranged on a surface of the circuit board facing away from 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.

[0055] In the above technical solution, the circuit board includes a first conductive terminal and a second conductive terminal, and the first conductive terminal and the second conductive terminal are both arranged on the surface of the circuit board away from the bracket, so as to facilitate the connection of the first conductive terminal and the second conductive terminal with other mechanisms; the first conductive terminal and the second conductive terminal are configured to input and output electrical energy of the battery pack, so that the battery pack can 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 for at least one of the first conductive terminal and the second conductive terminal, thereby reducing the possibility of excessive temperature of the circuit board or even thermal runaway.

[0056] In one or more embodiments of the second aspect, the first opening includes a first area and a second area arranged along the second direction, and along the third direction, a width of the second area is greater than a width of the first area;

[0057] Along the first direction, a projection of the first conductive terminal overlaps with a projection of the second region, and / or, along the first direction, a projection of the second conductive terminal overlaps with a projection of the second region;

[0058] The third direction, the second direction, and the first direction are perpendicular to each other.

[0059] In the above technical solution, the first opening includes a first area and a second area arranged along the second direction, and along the third direction, the width of the second area is greater than the width of the first area; along the first direction, the projection of the first conductive terminal overlaps with the projection of the second area, and / or, along the first direction, the projection of the second conductive terminal overlaps with the projection of the second area, so that the air flow rate of the second area is larger, and the heat dissipation effect of at least one of the first conductive terminal and the second conductive terminal is better, further reducing the possibility of excessive temperature of the circuit board or even thermal runaway.

[0060] In one or more embodiments of the second aspect, the battery pack further comprises an electrical connector, wherein the electrical connector connects at least two of the battery cells;

[0061] The electrical connector includes a first portion and a second portion, wherein the first portion and the second portion are connected;

[0062] In the first direction, the first portion is disposed between the bracket and the first shell portion, and the first portion is connected to the circuit board;

[0063] In the third direction, the second portion is disposed between the bracket and the second shell portion, and the second portion is connected to the battery core;

[0064] Wherein, the first direction is perpendicular to the third direction.

[0065] 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, and the first part and the second part are connected; in a first direction, the first part is arranged between the bracket and the first shell, and the first part is connected to the circuit board; in a third direction, the second part is arranged between the bracket and the second shell, and the second part is connected to the battery cells, so that the circuit board can be electrically connected to the battery cells through the first part and the second part, and the voltage, current, resistance, temperature and other parameters of the battery cells can be obtained in real time, so as to facilitate the control of the charging and discharging of the battery cells.

[0066] In a third aspect, the present application provides an electrical device, comprising a load and a battery module as described above or a battery pack as described above, wherein the battery module or the battery pack supplies power to the load. BRIEF DESCRIPTION OF THE DRAWINGS

[0067] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can also be obtained based on these drawings.

[0068] Figure 1 A schematic diagram of the three-dimensional structure of a battery module provided in some embodiments of the present application;

[0069] Figure 2 A schematic structural diagram of a partial structure of a battery module provided in some embodiments of the present application observed along a direction opposite to the first direction;

[0070] Figure 3 A schematic structural diagram of a battery module provided in some embodiments of the present application when viewed in a direction opposite to a first direction;

[0071] Figure 4 A schematic structural diagram of a battery module provided in some embodiments of the present application viewed along a first direction;

[0072] Figure 5 The battery module and circuit board provided in some embodiments of the present application are Figure 1 Schematic diagram of the cross-sectional structure of line II;

[0073] Figure 6 A schematic diagram of a partial structure of a bracket of a battery module provided in some embodiments of the present application;

[0074] Figure 7 A schematic diagram of a three-dimensional structure of a battery module provided in some embodiments of the present application from another perspective;

[0075] Figure 8 A schematic structural diagram of a bracket of a battery module provided in some embodiments of the present application observed along a first direction;

[0076] Fig. 9 A schematic diagram of a three-dimensional structure of a battery pack provided in some embodiments of the present application;

[0077] Fig.10 A schematic structural diagram of a battery pack provided in some embodiments of the present application viewed along a first direction;

[0078] Fig.11 A schematic diagram of an exploded structure of a battery pack provided in some embodiments of the present application from one perspective;

[0079] Fig.12 The battery pack provided in some embodiments of the present application is Fig. 9 A schematic diagram of the cross-sectional structure of line II-II;

[0080] Fig.13 A schematic diagram of a partial structure of a battery pack provided in some embodiments of the present application;

[0081] Fig.14 A schematic structural diagram of a partial structure of a battery pack provided in some embodiments of the present application observed along a direction opposite to the first direction;

[0082] Fig.15 A partial structure of a battery pack provided in some embodiments of the present application viewed along the direction opposite to the third direction Fig. 9 A schematic diagram of the cross-sectional structure of line II-II;

[0083] Fig.16 A schematic diagram of an exploded structure of a battery pack provided in some embodiments of the present application from another perspective;

[0084] Fig.17 The battery pack provided in some embodiments of the present application is Fig. 9 A schematic cross-sectional view of line II-II;

[0085] Fig.18A schematic diagram of the structure of an electric device provided in some embodiments of the present application;

[0086] Fig.19 A schematic diagram of the structure of an electric device provided in some other embodiments of the present application;

[0087] Fig. 20 A schematic diagram of the structure of an electrical device provided in some other embodiments of the present application.

[0088] Icons: 10-battery module; 101-first gap; 102-second gap; 100-cell group; 11-cell; 110-first cell; 120-second cell; 130-third cell; 200-bracket; 201-first opening; 2011-first area; 2012-second area; 2013-first end; 2014-second end; 202-second opening; 2021-first sub-opening; 2022-second sub-opening; 203-first vent; 204-connecting port; 205-flow guide channel; 206-fourth opening; 210-first bracket; 211-first side wall; 220-second bracket; 221-second side wall; 231-main body; 232-flange; 2321-peripheral wall; 233-first flow guide; 2 34-second guide part; 235-third guide part; 236-fourth guide part; 2361-first guide plate; 2362-second guide plate; 2363-third guide plate; 237-support member; 238-second limiting protrusion; 300-housing; 301-first through hole; 302-second through hole; 303-third through hole; 310-first shell; 320-second shell; 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. DETAILED DESCRIPTION

[0089] In order to make the purpose, technical solutions and advantages of the present application clearer, the technical solutions in the embodiments of the present application will be clearly described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field belong to the scope of protection of this application.

[0090] Unless otherwise defined, all technical and scientific terms used in this application have the same meanings as those commonly understood by technicians in the technical field to which this application belongs; the terms used in the specification of this application are only for the purpose of describing specific embodiments and are not intended to limit this application; the terms "including" and "having" in the specification and claims of this application and the above-mentioned figure descriptions and any variations thereof are intended to cover non-exclusive inclusions.

[0091] The terms "first", "second", etc. in the specification and claims of this application or the above-mentioned drawings are used to distinguish different objects, rather than to describe a specific order or a primary and secondary relationship.

[0092] Reference to "embodiment" in this application means that a particular feature, structure, or characteristic described in conjunction with the embodiment may be included in at least one embodiment of the present application. The appearance of the phrase in various places in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments.

[0093] In the embodiments of the present application, the same reference numerals represent 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 the present application shown in the drawings, as well as the overall thickness, length, width and other dimensions of the integrated device are only exemplary descriptions and should not constitute any limitation to the present application.

[0094] With the development of the new energy industry, batteries are gradually developing in the direction of high energy density and high power density. However, batteries with high energy density and high power density are more likely to generate heat. At present, the battery cells in the battery module mainly dissipate heat to the outside of the bracket by contacting with the bracket. The heat dissipation effect of the battery module is poor, which may cause the battery module temperature to be too high, and may further cause thermal runaway of the battery module. Therefore, how to improve the heat dissipation effect of the battery module has become an urgent problem to be solved.

[0095] In order to improve the heat dissipation effect of a battery module, the present application provides a battery module, the battery module includes a battery cell group and a bracket, the battery cell group includes multiple battery cells, and a first gap is formed between the multiple battery cells; the bracket accommodates the battery cell group, and the bracket is provided with a first opening on one side of a first direction, and a second opening on a side in the opposite direction of the first direction, the first opening and the second opening are both connected to the outside of the battery module, and the first opening and the second opening are connected through the first gap.

[0096] In a battery module of this structure, the battery module includes a cell group and a bracket, the cell group includes multiple cells, which can make the capacity of the battery module larger; the bracket accommodates the cell group, and can support and protect the cell group, so that the cell group remains stable during the charging and discharging process, and reduces the possibility of the cell group being damaged by external force; the bracket is provided with a first opening on one side in the first direction, and a second opening on the side opposite to the first direction, the first opening and the second opening are both connected to the outside of the battery module, and the first opening and the second opening are connected through a first gap, so that the first opening, the first gap and the second opening form a heat dissipation channel connected to the outside of the battery module, and the gas can dissipate the heat to the cell group through the heat dissipation channel, thereby improving the heat dissipation capacity of the battery module, reducing the possibility of thermal runaway of the battery module during the charging and discharging process, and extending the service life of the battery module.

[0097] The embodiment of the present application provides a battery pack including a battery module. The battery pack may be cylindrical, flat, rectangular or in other shapes, and the embodiment of the present application is not limited thereto.

[0098] The embodiments of the present application provide an electrical device that uses a battery module or a battery pack as a power source. The electrical device may be, but is not limited to, a mobile phone, a tablet, a laptop computer, an electric toy, an electric tool, an electric vehicle, an electric car, a ship, a spacecraft, and the like.

[0099] See also Figures 1 to 4 An embodiment of the present application provides a battery module 10, including a battery cell group 100 and a bracket 200, wherein the battery cell group 100 includes a plurality of battery cells 11 (for example, the first battery cell 110 (11), the second battery cell 120 (11), and the third battery cell 130 (11) as shown in the figure), and the bracket 200 accommodates the battery cell group 100.

[0100] In some embodiments, a first gap 101 is formed between the plurality of battery cells 11 .

[0101] In some embodiments, the first gap 101 formed between the plurality of battery cells 11 may be formed between two adjacent battery cells 11 of the plurality of battery cells 11 .

[0102] In some embodiments, the first gap 101 may be formed between some of the battery cells 11 and other battery cells 11 in the plurality of battery cells 11 .

[0103] In some embodiments, the first gap 101 may be formed between some of the battery cells 11 and one of the battery cells 11 .

[0104] In some embodiments, the bracket 200 is provided with a first opening 201 on one side of the first direction X, and a second opening 202 on the side opposite to the first direction X, and both the first opening 201 and the second opening 202 are connected to the outside of the battery module 10 .

[0105] In some embodiments, the first opening 201 and the second opening 202 are connected through the first gap 101 .

[0106] In the embodiment of the present application, the first direction X, the second direction Y, and the third direction Z are perpendicular to each other.

[0107] In other embodiments, the first direction X, the second direction Y, and the third direction Z may also intersect with each other.

[0108] The battery cell 11 may be a secondary battery or a primary battery, for example, a lithium ion battery, a sodium ion battery, or a magnesium ion battery, etc., which is not limited in the embodiment of the present application.

[0109] In some embodiments, the battery cell 11 is a cylindrical battery cell.

[0110] In some other embodiments, the battery cell 11 may also be a square battery cell.

[0111] In other embodiments, the battery cell 11 may also be a soft-pack battery cell.

[0112] In some embodiments, the first opening 201 may be substantially square in shape.

[0113] In other embodiments, the first opening 201 may also be arranged in a circular, elliptical, racetrack, or other shape.

[0114] The battery module 10 includes a battery cell group 100 and a bracket 200. The battery cell group 100 includes a plurality of battery cells 11, which can make the capacity of the battery module 10 larger. The bracket 200 accommodates the battery cell group 100, and can play a supporting and protective role for the battery cell group 100, so that the battery cell group 100 remains stable during the charging and discharging process, and reduces the possibility of the battery cell group 100 being damaged by external forces. The bracket 200 is provided with a first opening 201 on one side of the first direction X, and a second opening 202 on the side opposite to the first direction X. The first opening 201 and the second opening 202 are both connected to the outside of the battery module 10. The first opening 201 and the second opening 202 are connected through the 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. The gas can dissipate the heat of the battery cell group 100 through the heat dissipation channel, thereby improving the heat dissipation capacity of the battery module 10, reducing the possibility of thermal runaway of the battery module 10 during charging and discharging, and extending the service life of the battery module 10.

[0115] See also Figures 5 to 7 In some embodiments, the bracket 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 .

[0116] By setting a first guide portion 233 on one side of the bracket 200 along the first direction X, and making the first guide portion 233 configured to guide the 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 portion 233, and then flow to the second opening 202 through the first gap 101, which can increase the speed of the airflow entering the first opening 201, thereby further improving the heat dissipation capacity of the battery module 10.

[0117] In some embodiments, the first guide portion 233 is arranged in an arc shape.

[0118] By making the first guide portion 233 arc-shaped, the airflow entering the battery module 10 along the first direction X can be changed in direction through the first guide portion 233 to flow to the first opening 201, and the process of the airflow flowing from the outside of the battery module 10 to the first opening 201 is smooth, and the flow speed of the airflow is faster, thereby further improving the heat dissipation capacity of the battery module 10.

[0119] In some other embodiments, the first guide portion 233 may also be arranged in an L-shape, which is not limited here.

[0120] In some embodiments, the bracket 200 includes a main body 231 and a flange 232, the first opening 201 is provided on one side of the main body 231 in the first direction X, the second opening 202 is provided on one side of the main body 231 in the opposite direction of the first direction X, the flange 232 is provided on one side of the main body 231 in the first direction X and extends along the first direction X, the flange 232 surrounds a first air outlet 203, and the first air outlet 203 is connected to 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 outlet 203.

[0121] In some embodiments, along the first direction X, the projection of the first air guide portion 233 overlaps with the projection of the first air outlet 203. The projection of the first air guide portion 233 may partially overlap with the first air outlet 203, or the projection of the first air outlet 203 may be within the projection of the first air guide portion 223, or the projection of the first air guide portion 233 may be within the projection of the first air outlet 203.

[0122] In some embodiments, the flange 232 may be arranged in a rectangular shape along a cross section perpendicular to the first direction X.

[0123] In other embodiments, the cross section of the flange 232 along the direction perpendicular to the first direction X may also be in a circular, elliptical or other shape.

[0124] In some embodiments, the first air outlet 203 may be arranged in a rectangular shape.

[0125] In other embodiments, the first air outlet 203 may also be provided in a circular, elliptical or other shape.

[0126] The bracket 200 includes a main body 231 and a flange 232. The first opening 201 is arranged on one side of the main body 231 in the first direction X, and the second opening 202 is arranged on one side of the main body 231 in the opposite direction of the first direction X. The flange 232 is arranged on one side of the main body 231 in the first direction X and extends along the first direction X. The flange 232 surrounds a first air outlet 203, and the first air outlet 203 is connected to the first opening 201. Along the first direction X, the projection of the first guide portion 233 overlaps with the projection of the first air outlet 203, so that the airflow entering the battery module 10 from the first air outlet 203 can directly flow to the first opening 201 through the first guide portion 233, and the flow process of the airflow is smoother, which can make the flow speed of the airflow faster, thereby further improving the heat dissipation capacity of the battery module 10.

[0127] In some embodiments, the flange 232 includes a peripheral wall 2321 , and the peripheral wall 2321 is provided with a communication port 204 , and the communication port 204 is connected with the first air port 203 and the first opening 201 .

[0128] In some embodiments, the communication port 204 may be arranged in a rectangular shape.

[0129] In other embodiments, the communication opening 204 may also be provided in a circular, elliptical or other shape.

[0130] In some embodiments, the communication port 204 is disposed on a side of the flange 232 close to the first opening 201 in the second direction Y, so as to facilitate airflow to flow directly into the first opening 201 .

[0131] The flange 232 includes a peripheral wall 2321 , which is provided with a connecting port 204 , which connects the first air port 203 and the first opening 201 , so that the airflow entering the battery module 10 from the first air port 203 along the first direction X can change direction through the connecting port 204 to flow to the first opening 201 .

[0132] In some embodiments, the battery cell group 100 includes a first battery cell 110 and a second battery cell 120 adjacently arranged in the second direction Y, and the first gap 101 is located between the first battery cell 110 and the second battery cell 120; the bracket 200 also includes a second guide portion 234 and a third guide portion 235, the second guide portion 234 is connected to the first guide portion 233, and the second guide portion 234 and the third guide portion 235 are configured to guide the airflow to the first gap 101. This makes the airflow have a better heat dissipation effect on the first battery cell 110 and the second battery cell 120, and can reduce the possibility of the first battery cell 110 and the second battery cell 120 being overheated or even causing thermal runaway during the charging and discharging process.

[0133] In some embodiments, the first battery cell 110 can be located in the middle of the battery cell group 100 along the second direction Y. In general, it is difficult for the heat of the battery cell located in the middle of the battery cell group 100 to dissipate after it is heated, and the heat is most seriously concentrated in the middle of the battery cell group 100. By providing a second guide portion 234 and a third guide portion 235 to guide the airflow introduced by the first guide portion 233 to the first gap 101 between the first battery cell 110 and the second battery cell 120, the heat dissipation effect on the first battery cell 110 can be enhanced and the possibility of thermal runaway of the first battery cell 110 can be reduced.

[0134] In some embodiments, in some embodiments, the second guide portion 234 and the third guide portion 235 may be arranged in an arc shape, the second guide portion 234 is arranged to fit the second battery cell 120 , and the third guide portion 235 is arranged to fit the first battery cell 110 .

[0135] By setting the second guide portion 234 and the third guide portion 235 to be arc-shaped, the second guide portion 234 can be easily attached to the second battery cell 120, and the third guide portion 235 can be attached to the first battery cell 110, and the airflow introduced from the first guide portion 233 can flow more smoothly between the second guide portion 234 and the third guide portion 235. By making the second guide portion 234 attached to the second battery cell 120 and the third guide portion 235 attached to the first battery cell 110, the spacing between the second guide portion 234 and the third guide portion 235 can be larger, and more airflow can be guided between the first battery cell 110 and the second battery cell 120, thereby improving the heat dissipation effect on the first battery cell 110 and the second battery cell 120.

[0136] In some embodiments, the second guide portion 234 has a different bending direction from the first guide portion 233 , which can facilitate the airflow to change its flow direction when flowing through the first guide portion 233 , the second guide portion 234 and the third guide portion 235 , making the flow smoother.

[0137] See also Figure 7In some embodiments, the bracket 200 further includes a fourth guide portion 236, at least part of which is disposed at the end of the bracket 200 in the opposite direction of the second direction Y, and the fourth guide portion 236 is connected to the first guide portion 233; the fourth guide portion 236 forms a guide channel 205, and the guide channel 205 surrounds at least part of the end of the battery cell group 100 in the opposite direction of the second direction Y, and the guide channel 205 is also connected to the outside of the battery module 10. In some embodiments, one end of the guide channel 205 has a fourth opening 206, and airflow can flow into the guide channel 205 from the fourth opening 206, and return after reaching the end of the guide channel 205 away from the fourth opening 206, and then flow out from the fourth opening 206.

[0138] By setting the fourth guide portion 236, at least part of the fourth guide portion 236 is arranged at the end of the bracket 200 in the opposite direction of the second direction Y, and the fourth guide portion 236 is connected to the first guide portion 233; the fourth guide portion 236 forms a guide channel 205, and the guide channel 205 surrounds at least part of the end of the battery cell group 100 in the opposite direction of the second direction Y. The guide channel 205 is also connected to the outside of the battery module 10, so that air can flow in the guide channel 205 to dissipate heat for at least part of the battery cell group 100 surrounded by the guide channel 205, and at least part of the battery cell group surrounded by the guide channel 205 is not exposed in the first opening 201, and heat is dissipated by the guide channel 205 and the first opening 201, which is conducive to improving the overall heat dissipation capacity of the battery module 10, and the possibility of thermal runaway of the battery module 10 during charging and discharging is lower.

[0139] In some embodiments, the battery cell group 100 further includes a third battery cell 130 (11), and along the second direction Y, the third battery cell 130 (11) is disposed on a side of the second battery cell 120 (11) facing away from the first battery cell 110. The fourth guide portion 236 includes a first guide plate 2361, a second guide plate 2362, and a third guide plate 2363. The first guide plate 2361 is connected to the first guide plate 233 and the second guide plate 234, and is arranged in close contact with the second battery cell 120 (11). The second guide plate 2362 is connected to the first guide plate 2361, and is arranged in close contact with the third battery cell 130 (11). The third guide plate 2363 is connected to the connection between the first guide plate 233 and the flange 232. At least a portion of the third guide plate 2363 is spaced apart from the first guide plate 2361 and the second guide plate 2362 to form a guide channel 205. By disconnecting the air guide channel 205 from the first air outlet 203 , the airflow entering from the first air outlet 203 can all flow to the first opening 201 , thereby achieving a better heat dissipation effect on the first battery cell 110 ( 11 ) located in the middle of the battery module 10 .

[0140] See also Figure 3In some embodiments, the first opening 201 extends along the second direction Y. In the second direction Y, the first opening 201 has a first end 2013 close to the first guide portion 233 and a second end 2014 away from the first guide portion 233 .

[0141] The first opening 201 extends along the second direction Y, so that the airflow entering the first opening 201 can dissipate heat for the multiple battery cells 11 exposed to 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.

[0142] In some embodiments, the width of the first opening 201 in the third direction Z increases along the second direction Y.

[0143] 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.

[0144] In some embodiments, along the third direction Z, the first opening 201 has a first side wall 211 and a second side wall 221 , the first side wall 211 is parallel to the second direction Y, and the second side wall 221 is inclined relative to the second direction Y.

[0145] Along the third direction Z, the first opening 201 has a first side wall 211 and a second side wall 221. By making the first side wall 211 parallel to the second direction Y and the second side wall 221 inclined relative to the second direction Y, the airflow flows along the second direction Y on the first side wall 211 and flows a longer distance in the second direction Y to dissipate heat to more battery cells. At the same time, the airflow flows along the direction inclined relative to the second direction Y on the second side wall 221, so that the airflow can flow toward the second end 2014 of the first opening 201 while also flowing toward the third direction Z to dissipate heat on the surface of the battery cell exposed in the third direction Z, so that the overall heat dissipation capacity of the battery module 10 is stronger.

[0146] See also Figure 4 In some embodiments, the second opening 202 extends along the second direction Y.

[0147] The second opening 202 extends along the second direction Y, so that the airflow entering the second opening 202 can dissipate heat for the multiple battery 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.

[0148] See also Figure 8In some embodiments, the second opening 202 includes a first sub-opening 2021 and a second sub-opening 2022. In the first direction X, the projections of the first sub-opening 2021 and the first opening 201 overlap, and the second sub-opening 2022 extends in the opposite direction of the second direction Y; along 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.

[0149] In some embodiments, the first sub-opening 2021 and the second sub-opening 2022 may be arranged in a square shape.

[0150] In other embodiments, the first sub-opening 2021 and the second sub-opening 2022 may also be arranged in a circular, elliptical, racetrack, or other shape.

[0151] 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 equal sections along the second direction Y, and then the widths of these 10 sections along the third direction Z at both ends of the second direction Y are measured respectively, for a total of 11 values, and the average value of the 11 values ​​is taken, which is the width of the first sub-opening 2021 or the second sub-opening 2022.

[0152] 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, so that the airflow can directly reach the first sub-opening 2021 through the first opening 201 and the first gap 101, so as to dissipate heat for the battery cell that overlaps with the projection of the first sub-opening 2021 and the projection of the first opening 201 along the first direction X; and since the projection of the first sub-opening 2021 overlaps with that of the first opening 201 in the first direction X, the airflow flows from the first opening 201 and the first gap 101 to the bracket 2 After one side of the bracket 200 is provided with the second opening 202, it is easier to flow in the first sub-opening 2021 and difficult to flow to the second sub-opening 2022. In the present application, along the third direction Z, the width of the first sub-opening 2021 is greater than the width of the second sub-opening 2022, so that the airflow reaching the side of the bracket 200 where the second opening 202 is provided can flow in the second sub-opening 2022 at a faster speed than the first sub-opening 2021, thereby making it easier for the airflow to flow in the second sub-opening 2022, and further heat the battery cells exposed to the second sub-opening 2022 along the first direction X, so that the overall heat dissipation capacity of the battery module 10 is stronger.

[0153] See also Figure 1In some embodiments, the bracket 200 includes a first bracket 210 and a second bracket 220 , and the second bracket 220 and the first bracket 210 are arranged along a third direction Z to form a first opening 201 and a second opening 202 .

[0154] 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 of the third direction Z.

[0155] In some other embodiments, the first opening 201 and the second opening 202 may also be formed by depressions in the first bracket 210 or the second bracket 220 .

[0156] 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 group 100 and the bracket 200 .

[0157] See also Figures 9 to 11 The embodiment of the present application provides a battery pack 20, which includes the battery module 10 and the shell 300 provided in any of the above embodiments, the shell 300 includes a first shell portion 310 and a second shell portion 320 opposite to each other in a first direction X, the first shell portion 310 is provided with a first through hole 301, the second shell portion 320 is provided with a second through hole 302, and the first through hole 301 and the second through hole 302 are both connected to the outside of the battery pack 20; the battery module 10 is arranged in the shell 300; wherein, in the first direction X, the first opening 201 is arranged opposite to the first shell portion 310, the second opening 202 is arranged opposite to the second shell 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.

[0158] In some embodiments, the first through hole 301 may be arranged in a square shape.

[0159] In other embodiments, the first through hole 301 may also be arranged in a circular, elliptical, racetrack, or other shape.

[0160] In some embodiments, the second through hole 302 may be arranged in a circular shape.

[0161] In other embodiments, the second through hole 302 may also be arranged in a rectangular, elliptical, racetrack, or other shape.

[0162] In some embodiments, the number of the 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 airflow to flow out from the second through holes 302 and increase the speed of the airflow, thereby improving the heat dissipation capacity of the battery pack 20.

[0163] The battery pack 20 includes a shell 300 and a battery module 10. The battery module 10 is arranged in the shell 300, so that the shell 300 can support and protect the battery module 10, so that the battery module 10 remains stable during the charging and discharging process, and the possibility of the battery module 10 being damaged by external forces is reduced. The shell 300 includes a first shell portion 310 and a second shell portion 320 opposite to each other in a first direction X. The first shell portion 310 is provided with a first through hole 301, and the second shell portion 320 is provided with a second through hole 302. The first through hole 301 and the second through hole 302 are both connected to the outside of the battery pack 20. In the first direction X, the first opening 201 is arranged opposite to the first shell portion 310, and the second opening 202 is arranged opposite to the second shell 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, so that the first through hole 301, the first opening 201, the first gap 101, the second opening 202 and the second through hole 302 form a heat dissipation channel connected to the outside of the battery pack 20. The gas can dissipate the heat to the battery cell group 100 through the heat dissipation channel, thereby improving the heat dissipation capacity of the battery pack 20, reducing the possibility of thermal runaway of the battery pack 20 during charging and discharging, and extending the service life of the battery pack 20.

[0164] See also Fig.12 In some embodiments, the second shell portion 320 is further provided with a third through hole 303, the third through hole 303 is connected to the outside of the battery pack 20, the third through hole 303 is located at the end of the second shell portion 320, and the third through hole 303 is connected to the outside of the battery module 10; the second direction Y is perpendicular to the first direction X.

[0165] In some embodiments, the third through hole 303 may be arranged in a circular shape.

[0166] In other embodiments, the third through hole 303 may also be arranged in a rectangular, elliptical, racetrack, or other shape.

[0167] The second shell portion 320 is also provided with a third through hole 303, and the third through hole 303 is connected to the outside of the battery pack 20. The third through hole 303 is located at the end of the second shell portion 320, and the third through hole 303 is connected to the outside of the battery module 10, so that the air flow in the outer shell 300 can flow out through the third through hole 303, thereby being able to dissipate heat to the battery cell located at the end of the battery cell group 100 along the second direction Y, so that the overall heat dissipation capacity of the battery module 10 is stronger.

[0168] 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 flow process of the airflow is smoother, and the flow speed of the airflow can be made faster, thereby further improving the heat dissipation capacity of the battery pack 20.

[0169] 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. The projection of the third through hole 303 and the guide channel 205 may partially overlap, or the projection of the third through hole 303 may be within the projection of the guide channel 205, or the projection of the guide channel 205 may be within the projection of the third through hole 303.

[0170] In some embodiments, the number of the 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 airflow to flow in and out of the second through holes 302, increase the speed of the airflow, and thus improve the heat dissipation capacity of the battery pack 20.

[0171] In some embodiments, the bracket 200 is provided with a first air outlet 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 outlet 203 overlaps with the projection of the first through hole 301 .

[0172] In some embodiments, along the first direction X, the projection of the first air outlet 203 overlaps with the projection of the first through hole 301. The projection of the first air outlet 203 may partially overlap with the first through hole 301, or the projection of the first through hole 301 may be within the projection of the first air outlet 203, or the projection of the first air outlet 203 may be within the projection of the first through hole 301.

[0173] The bracket 200 is provided with a first air outlet 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 outlet 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 directly flow to the interior of the battery module 10 through the first air outlet 203, and the flow process of the airflow is smoother, which can make the flow speed of the airflow faster, thereby further improving the heat dissipation capacity of the battery pack 20.

[0174] See also Fig.13 and Fig.14In some embodiments, the battery pack 20 further includes a circuit board 400, which is electrically connected to the battery cell group 100; along the first direction X, the circuit board 400 is disposed between the bracket 200 and the first shell 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 outlet 203.

[0175] In some embodiments, along the first direction X, the projection of the third opening 401 overlaps with the projection of the first air outlet 203 . The projection of the third opening 401 may overlap with the first air outlet 203 , or the projection of the first air outlet 203 may be within the projection of the third opening 401 .

[0176] In some embodiments, the circuit board may include a printed circuit board (PCB).

[0177] In some other embodiments, the circuit board may also include a flexible printed circuit (FPC, Flexible Printed Circuit).

[0178] By providing the circuit board 400, the circuit board 400 is electrically connected to the battery cell group 100, so that the circuit board 400 can be used to control the charging and discharging of multiple battery cells of the battery cell group 100. Along the first direction X, the circuit board 400 is arranged between the bracket 200 and the first shell 310, and 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 outlet 203, so that the airflow entering the battery pack 20 from the first through hole 301 can directly flow to the inside of the battery module 10 through the first air outlet 203, reducing the possibility of the circuit board 400 blocking the airflow.

[0179] See also Fig.12 and Fig.15 In some embodiments, the circuit board 400 is spaced apart from the first opening 201 to form a second gap 102 , and the second gap 102 is connected to the first air outlet 203 .

[0180] By spacing the circuit board 400 and the first opening 201 to form a second gap 102, the second gap is connected to the first air port 203, so that the airflow flowing into the battery module 10 through the first air port 203 can also flow in the second gap 102, so that more gas can flow into the battery module 10 through the first air port 203, thereby improving the heat dissipation effect on the battery cell group 100, and also achieving heat dissipation for the circuit board 400, thereby making the overall heat dissipation capability of the battery pack 20 stronger.

[0181] See also Fig.14In some embodiments, the circuit board 400 includes a first conductive terminal 410 and a second conductive terminal 420. The first conductive terminal 410 and the second conductive terminal 420 are both disposed on a surface of the circuit board 400 away from the bracket 200, and the first conductive terminal 410 and the second conductive terminal 420 are configured to input and output electrical energy of 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.

[0182] 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 . The projection of the first conductive terminal 410 may partially overlap with the first opening 201 , or the projection of the first conductive terminal 410 may be within the projection of the first opening 201 .

[0183] 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 . The projection of the second conductive terminal 420 may partially overlap with the first opening 201 , or the projection of the second conductive terminal 420 may be within the projection of the first opening 201 .

[0184] By providing the first conductive terminal 410 and the second conductive terminal 420, the first conductive terminal 410 and the second conductive terminal 420 are both provided on the surface of the circuit board 400 away from the bracket 200, so as to facilitate the connection of the first conductive terminal 410 and the second conductive terminal 420 with other mechanisms. The first conductive terminal 410 and the second conductive terminal 420 are configured to input and output the electric energy of the battery pack 20, so that the battery pack 20 can provide electric energy to other mechanisms. Since the first conductive terminal 410 and the second conductive terminal 420 also generate heat during operation, by making the projection of the first conductive terminal 410 overlap with the projection of the first opening 201 along the first direction X, and / or, 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 for at least one of the first conductive terminal 410 and the second conductive terminal 420, thereby reducing the possibility of the circuit board 400 being overheated or even causing thermal runaway.

[0185] See also Figure 3 and Fig.14 In some embodiments, the first opening 201 includes a first region 2011 and a second region 2012 arranged along the second direction Y, and along the third direction Z, the width of the second region 2012 is greater than the width of the first region 2011. Fig.14The middle dashed line is 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.

[0186] 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 . The projection of the first conductive terminal 410 may partially overlap with the second region 2012 , or the projection of the first conductive terminal 410 may be within the projection of the second region 2012 .

[0187] 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 . The projection of the second conductive terminal 420 may partially overlap with the second region 2012 , or the projection of the second conductive terminal 420 may be within the projection of the second region 2012 .

[0188] In some embodiments, there is a smooth transition between the first area 2011 and the second area 2012, which facilitates the airflow to flow along the second direction Y and is not easily blocked.

[0189] In some other embodiments, a step may be formed between the first region 2011 and the second region 2012 , which is similar to the structure of the second opening 202 and will not be described in detail herein.

[0190] By making the width of the second area 2012 greater than the width of the first area 2011 along the third direction Z, the projection of the first conductive terminal 410 overlaps with the projection of the second area 2012 along the first direction X, and / or the projection of the second conductive terminal 420 overlaps with the projection of the second area 2012 along the first direction X, the air flow rate of the second area 2012 is increased, and the heat dissipation effect of at least one of the first conductive terminal 410 and the second conductive terminal 420 is better, thereby further reducing the possibility of the circuit board 400 overheating or even thermal runaway.

[0191] See also Fig.11 , Fig.13 and Fig.16 In some embodiments, the battery pack 20 further includes an electrical connector 500, the electrical connector 500 connects at least two battery cells, and the electrical connector 500 includes a first portion 510 and a second portion 520, and the first portion 510 and the second portion 520 are connected. In the first direction X, the first portion 510 is disposed between the bracket 200 and the first shell 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 shell 320, and the second portion 520 is connected to the battery cell 11.

[0192] In the battery pack 20, multiple cells can be connected in series, in parallel, or in mixed connection. Mixed connection means that multiple cells are connected in series and in parallel. Multiple cells can be directly connected in series, in parallel, or in mixed connection to form a cell group. Of course, multiple cells can also be connected in series, in parallel, or in mixed connection to form a cell group.

[0193] In some embodiments, electrical connector 500 is made of copper.

[0194] In some embodiments, the electrical connector 500 is configured to collect electrical signal information of the battery cell, and the electrical signal information includes but is not limited to voltage, current, resistance, and temperature.

[0195] In some embodiments, the first portion 510 and the circuit board 400 may be connected by welding, and the second portion 520 and the battery cell 11 may be connected by welding, such as laser welding or ultrasonic welding.

[0196] By setting the electrical connector 500, the electrical connector 500 connects at least two battery cells to connect multiple battery cells in series or in parallel. The electrical connector 500 includes a first part 510 and a second part 520, and the first part 510 and the second part 520 are connected; in the first direction X, the first part 510 is arranged between the bracket 200 and the first shell 310, and the first part 510 is connected to the circuit board 400; in the third direction Z, the second part 520 is arranged between the bracket 200 and the second shell 320, and the second part 520 is connected to the battery cell 11, so that the circuit board 400 can be electrically connected to the multiple battery cells 11 through the first part 510 and the second part 520; and the first part 510 can also play a supporting role for the circuit board 400, so that the circuit board 400 is spaced from the first opening 201; at the same time, the first part 510 can also play a limiting role for the circuit board 400, so that the circuit board 400 is not easy to be displaced relative to the bracket 200, and the overall structure of the battery pack 20 is more stable.

[0197] In some embodiments, the electrical connector 500 includes a third portion 530 connected between the first portion 510 and the second portion 520 .

[0198] 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 abuts against the circuit board 400 to support the circuit board 400 so that the circuit board 400 is spaced apart from the first opening 201 .

[0199] See also Fig.17In some embodiments, a first limiting protrusion 321 is provided on the inner side of the second shell portion 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, so that the battery module 10 is not easy to shake in the outer shell 300, and the overall structure of the battery pack 20 is more stable.

[0200] See also Fig.18 Some embodiments of the present application provide an electrical device 1, including a load 30 and a battery module 10 provided in any of the above embodiments, and the battery module 10 supplies power to the load 30.

[0201] See also Fig.19 Some other embodiments of the present application provide an electrical device 1, including a load 30 and a battery pack 20 provided in any of the above embodiments, and the battery pack 20 supplies power to the load 30.

[0202] See also Fig. 20 Some other embodiments of the present application provide an electrical device 1, including a load 30 and a battery pack 20 provided by any of the above embodiments, the battery pack 20 includes a battery module 10 provided by any of the above embodiments, and the battery pack 20 supplies power to the load 30.

[0203] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application may be combined with each other.

[0204] The above are only preferred embodiments of the present application and are not intended to limit the present application. For those skilled in the art, the present application may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A battery module, characterized in that: include: A battery cell group, comprising a plurality of battery cells, wherein a first gap is formed between the plurality of battery cells; A bracket is used to accommodate the battery cell group. The bracket is provided with a first opening on one side of a first direction and a second opening on the side opposite to the first direction. The first opening and the second opening are both connected to the outside of the battery module. The first opening and the second opening are connected through the first gap.

2. The battery module according to claim 1, characterized in that: The bracket is provided with a first air guide portion on one side of the first direction, and the first air guide portion is configured to guide the airflow to the first opening.

3. The battery module according to claim 2, characterized in that: The first guide portion 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 provided on one side of the main body in the first direction, the second opening is provided on one side of the main body in the opposite direction of the first direction, the flange is provided on one side of the main body in the first direction and extends along the first direction, the flange encloses a first air outlet, and the first air outlet is connected to the first opening; Along the first direction, a projection of the first air guide portion overlaps with a projection of the first air outlet.

5. The battery module according to claim 4, characterized in that: The flange includes a peripheral wall, and the peripheral wall is provided with a communication port, and the communication port is connected with the first air port and the first opening.

6. The battery module according to any one of claims 2 to 5, characterized in that: The battery cell group includes a first battery cell and a second battery cell adjacently arranged in a second direction, and the first gap is located between the first battery cell and the second battery cell; The bracket further includes a second air guide portion and a third air guide portion, the second air guide portion is connected to the first air guide portion, and the second air guide portion and the third air guide portion are configured to guide the airflow to the first gap; The second direction is perpendicular to the first direction.

7. The battery module according to claim 6, characterized in that: The bracket further includes a fourth guide portion, at least a portion of which is disposed at an end of the bracket in a direction opposite to the second direction, and the fourth guide portion is connected to the first guide portion; The fourth guide portion forms a guide channel, and the guide channel surrounds at least a portion of an end portion of the battery cell group in a direction opposite to the second direction. The guide channel is also connected to the outside of the battery module.

8. The battery module according to any one of claims 2 to 7, characterized in that: The first opening extends along a second direction, and in the second direction, the first opening has a first end close to the first flow guide portion and a second end away from the first flow 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 according to claim 8, characterized in that: Along the third direction, the first opening has a first side wall and a second side wall, the first side wall is parallel to the second direction, and the second side wall is 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 according to claim 10, characterized in that: The second opening includes a first sub-opening and a second sub-opening, in the first direction, the first sub-opening overlaps with the projection of the first opening, and the second sub-opening extends in the opposite direction of the second direction; Along the 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 according to any one of claims 1 to 11, characterized in that: The bracket includes a first bracket and a second bracket, and the second bracket and the first bracket are 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 according to any one of claims 1 to 12, characterized in that: The battery cell is a cylindrical battery cell.

14. A battery pack, comprising the battery module according to any one of claims 1 to 13, the battery pack further comprising: A housing, comprising a first housing portion and a second housing portion opposite to each other in the first direction, the first housing portion being provided with a first through hole, the second housing portion being provided with a second through hole, and both the first through hole and the second through hole being in communication with the outside of the battery pack; The battery module is disposed in the housing; Wherein, in the first direction, the first opening is arranged opposite to the first shell portion, the second opening is arranged opposite to the second shell portion, the first opening is communicated with the first through hole, and the second opening is communicated with the second through hole.

15. The battery pack according to claim 14, characterized in that: The second shell portion is further provided with a third through hole, the third through hole being communicated with the outside of the battery pack, the third through hole being located at an end of the second shell portion, and the third through hole being communicated with the outside of the battery module; The second direction is perpendicular to the first direction.

16. The battery pack according to claim 15, characterized in that: The bracket further includes a fourth guide portion, the fourth guide portion forming a guide channel, the guide channel surrounding at least a portion of an end of the battery cell group in a direction opposite to the second direction, and the guide channel is also connected to the outside of the battery module; Along the first direction, a projection of the third through hole overlaps with a projection of the guide channel.

17. The battery pack according to claim 14, characterized in that: The bracket is provided with a first air outlet, and the first air outlet is communicated with the first opening and the first through hole respectively; Along the first direction, a projection of the first air outlet overlaps with a projection of the first through hole.

18. The battery pack according to claim 17, characterized in that: The battery pack further includes a circuit board, the circuit board is electrically connected to the battery cell group, and along the first direction, the circuit board is arranged between the bracket and the first shell; The circuit board is provided with a third opening, and along the first direction, a projection of the third opening overlaps with a projection of the first air outlet.

19. The battery pack according to claim 18, characterized in that: The circuit board is spaced apart from the first opening to form a second gap, and the second gap is communicated with the first air outlet.

20. The battery pack according to claim 18, characterized in that: 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 a 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 electrical energy of the battery pack; Along the first direction, a projection of the first conductive terminal overlaps with a projection of the first opening, and / or, along the first direction, a projection of the second conductive terminal overlaps with a projection of the first opening.

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

22. The battery pack according to claim 18, characterized in that: The battery pack further comprises an electrical connector, wherein the electrical connector connects at least two of the battery cells; The electrical connector includes a first portion and a second portion, wherein the first portion and the second portion are connected; In the first direction, the first portion is disposed between the bracket and the first shell portion, and the first portion is connected to the circuit board; In the third direction, the second portion is disposed between the bracket and the second shell portion, and the second portion is connected to the battery core; Wherein, the first direction is perpendicular to the third direction.

23. An electrical device, characterized in that: It comprises 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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