Battery module and electric device

Abstract

The application discloses a battery module and a power utilization device, which comprise a battery cell and a circuit board. The battery cell comprises a battery cell shell, an electrode assembly and an electrode terminal. The battery cell shell comprises a top wall, a side wall, a first sealing part and a second sealing part. The first sealing part is connected to the top wall. The first sealing part comprises a first section, which is bent towards the top wall and is arranged opposite the top wall along a first direction, which is a direction perpendicular to the top wall. One end of the electrode terminal is connected to the electrode assembly, and the other end of the electrode terminal extends from the first section. The second sealing part is connected to the side wall. The second sealing part is bent towards the side wall and is arranged opposite the side wall along a second direction. The second sealing part is connected to the first sealing part and forms a first protruding part. Along the first direction, the first protruding part protrudes from the top wall. The first protruding part and the first section surround to form a first space. The circuit board is connected to the electrode terminal. Part of the circuit board is arranged in the first space. The thickness direction of the circuit board is perpendicular to the first direction, so that the space utilization rate is improved to increase the energy density.

Description

[0001] Cross-references to related applications This application is a divisional application of application number 202411448796.7, filed on October 16, 2024, entitled "Battery Module and Electrical Equipment". Technical Field

[0002] This application relates to the field of energy storage technology, and in particular to a battery module and electrical equipment. Background Technology

[0003] As battery modules become increasingly prevalent in mobile devices, electronic products, and electric vehicles, the demand for extended battery life is growing stronger, making it a constant goal for the industry to improve the energy density of battery modules. Summary of the Invention

[0004] In view of this, it is necessary to provide a battery module and electrical equipment to improve space utilization and energy density.

[0005] This application provides a battery module including a battery cell and a circuit board. The battery cell includes a cell housing, an electrode assembly, and electrode terminals. The electrode assembly is disposed within the cell housing. The cell housing includes a top wall, a side wall, a first sealing portion, and a second sealing portion. The first sealing portion is connected to the top wall and includes a first section. The first section bends towards the top wall and is disposed opposite to the top wall along a first direction, which is perpendicular to the top wall. One end of the electrode terminal is connected to the electrode assembly, and the other end of the electrode terminal extends from the first section. The second sealing portion is connected to the side wall and bends towards the side wall, which is disposed opposite to the side wall along a second direction. The second sealing portion connects to the first sealing portion and forms a first protrusion. Along the first direction, the first protrusion protrudes from the top wall, and the first protrusion and the first section enclose a first space. The circuit board is connected to the electrode terminals, and a portion of the circuit board is disposed in the first space. The thickness direction of the circuit board is perpendicular to the first direction. By enclosing the first space through the first protrusion and the first section, and by partially disposing of the circuit board in the first space, the space occupied by the circuit board along the first direction is reduced, improving space utilization and the energy density of the battery. The thickness direction of the circuit board is perpendicular to the first direction, which can improve the situation where the circuit board exceeds the cell housing in the thickness direction of the battery module due to the tilted setting of the circuit board, and helps to reduce the risk of the battery head being too thick. Under normal use, drop test, vibration and other working conditions, the thickness direction of the circuit board is perpendicular to the first direction, which helps to increase the contact area between the end face of the circuit board relative to the cell and the first sealing part along the first direction, reducing the risk of the edge of the circuit board being crushed or punctured by the first sealing part. After the battery module is installed in the electrical equipment, the thickness direction of the circuit board is perpendicular to the first direction, which helps to increase the contact area between the end of the circuit board away from the cell and the electrical equipment along the first direction, reducing the risk of the circuit board being impacted by the electrical equipment, deformed by the circuit board, and pulling on the electrode terminals, resulting in the breakage of the electrode terminals.

[0006] Optionally, in some embodiments of this application, the electrode terminal includes a first terminal extending from the first segment. The battery module also includes a protection component, which includes an overheat protection element, a first electrical connector, and a second electrical connector. The overheat protection element includes a body portion and a first connecting portion and a second connecting portion connected to the body portion. The first connecting portion, the body portion, and the second connecting portion are arranged along a second direction. Along the first direction, the body portion abuts against the side of the first segment away from the top wall, which facilitates accurate temperature measurement of the battery cell. The first electrical connector is connected to the first connecting portion and the circuit board, and the second electrical connector is connected to the second connecting portion and the first terminal.

[0007] Optionally, in some embodiments of this application, a first gap H1 is provided between the overheat protection component and the circuit board along the first direction, wherein the first gap H1 is 0.1mm≤H1≤2mm, thereby reducing the risk of the circuit board touching the overheat protection component and causing damage to the overheat protection component.

[0008] Optionally, in some embodiments of this application, the first terminal includes a first sub-part and a second sub-part, the first sub-part extending from a first section, and the second sub-part connected to the first sub-part. The second sub-part, the second connecting part, and the second electrical connector are stacked and connected along a first direction. The first electrical connector includes a first electrical connecting segment and a second electrical connecting segment connected to the first electrical connecting segment, the first connecting part and the first electrical connecting segment are stacked and connected along the first direction, and the second electrical connecting segment is stacked and connected to the circuit board along the thickness direction of the circuit board.

[0009] Optionally, in some embodiments of this application, the battery module further includes a first insulating member, which covers at least the first sub-part, the overheat protection member, the first electrical connection segment, and the first section along a first direction.

[0010] Optionally, in some embodiments of this application, a protection component is further included. The protection component includes an overheat protection element, which comprises a body portion and a first connecting portion and a second connecting portion connected to the body portion. The first connecting portion is laminated and connected to the circuit board along the thickness direction of the circuit board, and the second connecting portion is laminated and connected to the circuit board along the thickness direction of the circuit board. The circuit board includes a first receiving groove with a first opening facing a first section. The body portion is disposed in the first receiving groove, reducing the space occupied by the overheat protection element along the first direction. This allows more of the circuit board to be disposed in the first space, improving space utilization and battery energy density. The thickness direction of the body portion is parallel to the thickness direction of the circuit board, and a portion of the body portion is located in the first space. While improving space utilization, reducing the depth of the first receiving groove along the first direction reduces the impact of the depth of the first receiving groove on the structural strength and performance of the circuit board.

[0011] Optionally, in some embodiments of this application, along the thickness direction of the circuit board, the electrode terminals are connected to one side of the circuit board, and the first connection portion and the second connection portion are connected to the other side of the circuit board, thereby reducing interference between the electrode terminals and the first connection portion and the second connection portion.

[0012] Optionally, in some embodiments of this application, a heat-conducting element is further included, which connects the first section and the body portion, the body portion being configured to collect the temperature of the battery cell. Transferring the temperature of the battery cell to the body portion via the heat-conducting element facilitates the body portion's collection of the battery cell's temperature.

[0013] Optionally, in some embodiments of this application, the thermal conductive component includes thermally conductive adhesive. Along the thickness direction of the circuit board, the thermally conductive adhesive covers the surface of the main body. Along the first direction, the thermally conductive adhesive fills the gap between the first section and the main body, which is beneficial for accurately collecting the temperature of the battery cell.

[0014] Optionally, in some embodiments of this application, the first sealing portion further includes two second sections, which are respectively connected to the two ends of the first section along a second direction, wherein the first direction is perpendicular to the second direction. Each second sealing portion includes a main sealing portion and an extended sealing portion. Along the second direction, the main sealing portion overlaps with the sidewall, and the extended sealing portion connects to the second section and forms a first protrusion. The battery module includes two or more battery cells arranged along the second direction. The circuit board includes a second receiving groove with a second opening facing the first protrusion. Along the second direction, adjacent first protrusions of different battery cells extend into the second receiving groove from the second opening, which helps to reduce the space occupied by the battery module along the first direction and improve space utilization.

[0015] Optionally, in some embodiments of this application, a frame is further included, with the cell housing located within the frame when viewed along the thickness direction of the cell. The frame includes a reinforcing section located between the cell housing and the circuit board along a first direction. The reinforcing section includes a first segment and a second segment spaced apart along a second direction. The first segment includes a first sub-segment and a second sub-segment. Along the first direction, the first sub-segment is located on the side of the first protrusion away from the top wall, and the second sub-segment is located between the first section and the circuit board. The second segment includes a third sub-segment and a fourth sub-segment. Along the first direction, the third sub-segment is located between another first protrusion of the same cell and the circuit board, and the fourth sub-segment is located between the first section and the circuit board. When viewed along the thickness direction of the cell, the main body is located between the first segment and the second segment along the second direction. By spaced apart between the first segment and the second segment, and with the main body located between the first segment and the second segment, the main body, the first segment, and the second segment share a first space, which is beneficial for improving space utilization.

[0016] Optionally, in some embodiments of this application, the battery module includes a plurality of cells arranged along a second direction, and a portion of the circuit board is disposed within a first space of each cell, the first direction being perpendicular to the second direction.

[0017] Optionally, in some embodiments of this application, the battery module includes a first cell group and a second cell group arranged along a first direction. Each of the first and second cell groups includes at least one cell. Along the first direction, one side of a circuit board is disposed in a first space of one of the first cell groups, and the other side is disposed in a first space of the second cell group.

[0018] Embodiments of this application provide an electrical device, including the battery module in any of the above embodiments. Attached Figure Description

[0019] Figure 1 A schematic diagram of the battery module in the first embodiment of this application is shown.

[0020] Figure 2A schematic diagram of the battery module from another perspective in the first embodiment of this application is shown.

[0021] Figure 3 This application shows Figure 1 A schematic diagram of the cross section along AA.

[0022] Figure 4 This application shows Figure 2 A schematic diagram of the cross-section along BB.

[0023] Figure 5 This application shows Figure 4 Enlarged schematic diagram of the middle part of the structure.

[0024] Figure 6 A schematic diagram of another arrangement of battery cells in the first embodiment of this application is shown.

[0025] Figure 7 A schematic diagram of the battery cell structure in the first embodiment of this application is shown.

[0026] Figure 8 A schematic diagram of the structure of a battery cell in another state according to the first embodiment of this application is shown.

[0027] Figure 9 This application shows Figure 8 A schematic diagram of the battery cell from another perspective.

[0028] Figure 10 A schematic diagram of the battery module in the second embodiment of this application is shown.

[0029] Figure 11 A schematic diagram of the battery module from another perspective is shown in the second embodiment of this application.

[0030] Figure 12 This application shows Figure 10 A schematic diagram of the cross-section along CC.

[0031] Figure 13 This application shows Figure 12 Enlarged schematic diagram of the middle part of the structure.

[0032] Figure 14 This application shows Figure 12 Enlarged schematic diagram of the middle part of the structure.

[0033] Figure 15 This application shows Figure 12 Enlarged schematic diagram of the middle part of the structure.

[0034] Figure 16 A schematic diagram of the frame structure in the second embodiment of this application is shown.

[0035] Figure 17 A schematic diagram of the battery cell and protection components in the second embodiment of this application is shown.

[0036] Figure 18 A schematic diagram of the battery cell and protection components from another perspective is shown in the second embodiment of this application.

[0037] Figure 19 An exploded view of the battery cell and protection components in the second embodiment of this application is shown.

[0038] Figure 20 This application shows Figure 18 A schematic diagram of the cross-section along DD.

[0039] Figure 21 This application shows Figure 20 Enlarged schematic diagram of the middle part of the structure.

[0040] Figure 22 A schematic diagram of the thermal protection element in the second embodiment of this application is shown.

[0041] Figure 23 A schematic diagram of the battery module in the third embodiment of this application is shown.

[0042] Figure 24 This application shows Figure 23 A schematic diagram of the cross-section along EE.

[0043] Figure 25 This application shows Figure 24 Enlarged schematic diagram of the middle part of the structure.

[0044] Figure 26 This application shows Figure 23 A cross-sectional schematic diagram.

[0045] Figure 27 This application shows Figure 26 Enlarged schematic diagram of the middle part of the structure.

[0046] Figure 28 A schematic diagram of the circuit board and thermal protection device in the third embodiment of this application is shown.

[0047] Figure 29 A schematic diagram of the circuit board and thermal protection device from another perspective is shown in the third embodiment of this application.

[0048] Figure 30 A simplified schematic diagram of the electrical equipment in some embodiments of this application is shown.

[0049] Explanation of key component symbols: Battery Module 100 Battery Cell 10 First Space 10a First cell pack 110 Second battery pack 120 Cell casing 11 first convex portion 11a Top Wall 111 First sealing part 112 Section 112a Section 2, 112b Side wall 113 Second sealing part 114 Body sealing part 114a Extended sealing part 114b Electrode terminal 12 First terminal 121 First subsection 122a Second Subsection 122b Second terminal 122 Circuit board 20 Second receiving groove 20a Second opening 201 Gap 20b First receiving groove 20c First opening 202 Welding section 21 Frame 30 First connecting segment 31 Second connecting section 32 Strengthening sections 33, 34, and 35 First paragraph, 331, 341, 351 Second section 332, 342, 352 First sub-segment 341a, 351a Second sub-segments 341b, 351b Third sub-segments 342a, 352a Fourth sub-segments 342b and 352b Third connecting section 301 Protection component 40 Overheat protection component 41 Main body part 411 First connecting part 412 Second connecting part 413 First electrical connector 42 First electrical connection section 421 Second electrical connection section 422 Second electrical connector 43 Third electrical connection section 431 First adhesive component 101 Second adhesive component 102 First insulating component 103 Thermal conductive component 104 Thermal conductive adhesive 104a 200 electrical appliances First direction X Second direction Y Third direction Z The following specific embodiments will further illustrate this application in conjunction with the above-described accompanying drawings. Detailed Implementation

[0050] The technical solutions of the embodiments of this application will be described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments.

[0051] When a component is considered to be "located" on another component, it can be directly on the other component or may also be interspersed with other components. When a component is considered to be "connected" to another component, it can be directly connected to the other component or may also be interspersed with other components.

[0052] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein in the specification of this application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. The term "or / and" as used herein includes any and all combinations of one or more of the associated listed items.

[0053] It is understandable that the term "perpendicular" is used to describe an ideal state between two components. In actual production or use, two components can exist in a state that is approximately perpendicular or equal to each other. For example, combined with numerical description, perpendicularity can refer to the angle between two straight lines within the range of 90° ± 10°, the dihedral angle between two planes within the range of 90° ± 10°, or the angle between a straight line and a plane within the range of 90° ± 10°. The two components described as "perpendicular" do not have to be absolutely straight lines or planes; they can be approximately straight lines or planes. From a macroscopic perspective, if the overall direction of extension is a straight line or plane, the component can be considered a "straight line" or "plane".

[0054] The term "parallel" is used to describe an ideal state between two components. In actual production or use, two components can exist in a state that is approximately parallel. For example, in numerical terms, parallel can refer to the angle between two straight lines within the range of 180° ± 10°, the dihedral angle between two planes within the range of 180° ± 10°, or the angle between a straight line and a plane within the range of 180° ± 10°. The two components described as "parallel" do not have to be absolutely straight lines or planes; they can be approximately straight lines or planes. From a macroscopic perspective, if the overall direction of extension is straight or plane, the component can be considered a "straight line" or "plane".

[0055] Unless otherwise defined, the term "multiple" in this document, when used to describe the number of components, specifically means that the component is two or more.

[0056] The following detailed description of some embodiments of this application is provided in conjunction with the accompanying drawings. Unless otherwise specified, the following embodiments and features can be combined with each other.

[0057] Please see Figures 1 to 9 The first embodiment of this application provides a battery module 100, including a battery cell 10. The battery cell 10 includes a battery cell housing 11, an electrode assembly (not shown), and electrode terminals 12. The electrode assembly is disposed within the battery cell housing 11.

[0058] In some embodiments, the battery cell housing 11 includes a top wall 111 and a first sealing portion 112, the first sealing portion 112 being connected to the top wall 111. The first sealing portion 112 includes a first section 112a, which is bent toward the top wall 111 and disposed opposite to the top wall 111 along a first direction X. One end of the electrode terminal 12 is connected to an electrode assembly, and the other end extends from the first section 112a. The first direction X is perpendicular to the top wall 111.

[0059] In some embodiments, the battery cell housing 11 includes a sidewall 113 and a second sealing portion 114, the second sealing portion 114 being bent toward the sidewall 113 and disposed opposite to the sidewall 113 along a second direction Y.

[0060] In some embodiments, the second sealing portion 114 connects to the first sealing portion 112 and forms a first protrusion 11a. Along the first direction X, the first protrusion 11a protrudes from the top wall 111, and the first protrusion 11a and the first section 112a enclose a first space 10a.

[0061] In some embodiments, the battery module 100 includes a circuit board 20, the circuit board 20 is connected to the electrode terminal 12, a portion of the circuit board 20 is disposed in the first space 10a, and the thickness direction of the circuit board 20 is perpendicular to the first direction X.

[0062] Optionally, the circuit board 20 includes a BMS (Battery Management System) component, which includes multiple electronic components that can perform functions such as control, protection, communication, power calculation, signal transmission, and power transmission of the battery cell 10.

[0063] Optionally, circuit board 20 includes a flexible printed circuit board (FPC). Optionally, circuit board 20 includes a printed circuit board (PCB).

[0064] This application forms a first space 10a by enclosing a first protrusion 11a and a first section 112a. A portion of the circuit board 20 is disposed in the first space 10a, reducing the space occupied by the circuit board 20 along the first direction X, thereby improving space utilization and the energy density of the battery module 100. The thickness direction of the circuit board 20 is perpendicular to the first direction X, which can improve the situation where the circuit board 20 extends beyond the cell housing 11 in the thickness direction of the battery module 100 due to the tilted setting of the circuit board 20, and help reduce the risk of the battery head being too thick. Under normal use, drop test, vibration and other working conditions, the thickness direction of the circuit board 20 is perpendicular to the first direction X, which helps to increase the contact area between the end face of the circuit board 20 relative to the cell 10 and the first sealing part 112 along the first direction X, reducing the risk of the edge of the circuit board 20 being crushed or punctured by the first sealing part 112. After the battery module is installed in the electrical equipment, the thickness direction of the circuit board 20 is perpendicular to the first direction X, which helps to increase the contact area between the end of the circuit board 20 away from the cell 10 and the electrical equipment along the first direction X, reducing the risk of the circuit board 20 deforming and pulling the electrode terminal 12 due to impact with the electrical equipment, which could lead to the breakage of the electrode terminal 12.

[0065] Please see Figure 5 In some embodiments, the battery module 100 includes a first adhesive member 101 disposed between the top wall 111 and the first sealing portion 112. The first adhesive member 101 facilitates bending and connecting the first sealing portion 112 to the top wall 111.

[0066] Please see Figure 8 and Figure 9 In some embodiments, the first sealing portion 112 includes two second segments 112b along the second direction Y, and the two second segments 112b connect the two ends of the first segment 112a. Each second sealing portion 114 includes a body sealing portion 114a and an extension sealing portion 114b. The body sealing portion 114a is bent and connected to the sidewall 113. The body sealing portion 114a and the sidewall 113 are disposed opposite to each other along the second direction Y. The extension sealing portion 114b connects to the second segment 112b and forms a first protrusion 11a.

[0067] In some embodiments, the thickness direction of the cell 10 is the third direction Z, and the first direction X, the second direction Y, and the third direction Z are perpendicular to each other.

[0068] Please see Figures 1 to 3 In some embodiments, the battery module 100 includes a frame 30, and when viewed along the third direction Z, the cell housing 11 is located within the frame 30.

[0069] In some embodiments, the frame 30 includes a first connecting segment 31 and two second connecting segments 32 spaced apart along a second direction Y, wherein the first connecting segment 31 connects to the second connecting segments 32. Along the second direction Y, a battery cell 10 is disposed between two adjacent second connecting segments 32.

[0070] It is understandable that when multiple cells 10 are arranged along the second direction Y, adjacent frames 30 share a second connection segment 32.

[0071] In some embodiments, the frame 30 includes a reinforcing segment 33, the reinforcing segment 33 and a first connecting segment 31 are arranged along a first direction X, the reinforcing segment 33 is connected to a second connecting segment 32, and forms the frame 30.

[0072] In some embodiments, along the first direction X, a portion of the reinforcing section 33 is located between the cell housing 11 and the circuit board 20, providing insulation protection for the cell 10 and the circuit board 20, which helps to reduce the risk of edge damage or puncture of the first sealing portion 112 of the circuit board 20.

[0073] In some embodiments, along the third direction Z, the electrode terminals 12 of the battery cell 10 are all welded to the same side of the circuit board 20, so that the reinforcing section 33 can be disposed between the battery cell housing 11 and the circuit board 20 from the other side of the circuit board 20.

[0074] In some embodiments, the reinforcing segment 33 includes a first segment 331, a second segment 332, and a third segment 333 arranged consecutively. The first segment 331 connects to one of the second connecting segments 32, and the third segment 333 connects to an adjacent second connecting segment 32. Along the first direction X, the first segment 331 is located on the side of the first protrusion 11a away from the top wall 111, the second segment 332 is located between the first segment 112a and the circuit board 20, and the third segment 333 is located between another first protrusion 11a of the same battery cell 10 and the circuit board 20.

[0075] In some embodiments, the battery module 100 includes a plurality of battery cells 10, and the circuit board 20 includes a second receiving groove 20a. The second receiving groove 20a has a second opening 201 facing the first protrusion 11a. The first protrusions 11a of two battery cells 10 arranged side by side along the second direction Y extend into the second receiving groove 20a from the second opening 201. This is beneficial to reduce the space occupied by the battery module 100 along the first direction X and improve space utilization.

[0076] Please see Figure 6 In some embodiments, multiple battery cells 10 are arranged along a second direction Y. A portion of a circuit board 20 is disposed within a first space 10a of each battery cell 10. In this embodiment, along the first direction X, the circuit board 20 has a second receiving groove 20a and a second opening 201 on the side facing the multiple battery cells 10, and a first protrusion 11a adjacent to different battery cells 10 extends from the second opening 201 into the second receiving groove 20a.

[0077] In some embodiments, the number of second receiving grooves 20a is M, and the number of battery cells 10 is N, where N is a natural number greater than or equal to 2, and M+1=N.

[0078] When multiple battery cells 10 are arranged along the second direction Y, the frame 30 includes a third connecting section 301. A second connecting section 32, located on the outermost side along the second direction Y, extends a reinforcing section 33 along the first direction X and connects to the third connecting section 301. Along the first direction X, a circuit board is located between the third connecting section 301 and the reinforcing section 33. The reinforcing section 33 is located between the circuit board 20 and the battery cell 10. The battery cell 10 is located between the reinforcing section 33 and the first connecting section 31. The battery cell 10 is located within the space enclosed by the first connecting section 31, the second connecting section 32, and the reinforcing section 33. The circuit board 20 is located within the space enclosed by the second connecting section 32, the third connecting section 301, and the reinforcing section 33.

[0079] Please see Figure 3 In some embodiments, the battery module 100 includes a first cell group 110 and a second cell group 120 arranged along a first direction X. A circuit board 20 is located between the first cell group 110 and the second cell group 120 along the first direction X. Both the first cell group 110 and the second cell group 120 include at least one cell 10. Along the first direction X, one side of the circuit board 20 is disposed in the first space 10a of each cell 10 of the first cell group 110, and the other side is disposed in the first space 10a of each cell 10 of the second cell group 120.

[0080] In some embodiments, the first cell group 110 and the second cell group 120 each include a plurality of cells 10 arranged along the second direction Y. Along the first direction X, the circuit board 20 is provided with a second receiving groove 20a and a second opening 201 on the side facing the first cell group 110. The circuit board 20 is also provided with a second receiving groove 20a and a second opening 201 on the side facing the second cell group 120. The first protrusion 11a of two adjacent cells 10 arranged side by side along the second direction Y in the first cell group 110 extends into the second receiving groove 20a from the second opening 201. The first protrusion 11a of two adjacent cells 10 arranged side by side along the second direction Y in the second cell group 120 extends into the second receiving groove 20a from the second opening 201.

[0081] When the battery module 100 includes a first cell group 110 and a second cell group 120 arranged along a first direction X, the frame 30 includes a third connecting section 301, which connects to a second connecting section 32 located on the outermost side along a second direction Y. The first cell group 110 and the second cell group 120 are located within the space enclosed by the first connecting section 31, the second connecting section 32, and the reinforcing section 33. The circuit board 20 is located within the space enclosed by the third connecting section 301 and the reinforcing section 33.

[0082] Please see Figures 10 to 22 The second embodiment of this application provides a battery module 100, which differs from the first embodiment in that the battery module 100 includes a protection component 40. The protection component 40 is located on the side of the first section 112a opposite to the top wall 111, and connects the electrode terminals 12 and the circuit board 20. The protection component 40 is used to detect the temperature of the battery cell 10. When the ambient temperature reaches a predetermined temperature range or the current exceeds a predetermined range, the protection component 40 can disconnect the backflow of the battery module 100, protecting the safety of the battery module 100.

[0083] Please see Figure 19 In some embodiments, the battery module 100 includes a second adhesive member 102 located between the protective component 40 and the first segment 112a along a first direction X. The protective component 40 is adhesively connected to the first segment 112a via the second adhesive member 102.

[0084] Please see Figure 21 In some embodiments, when viewed along the first direction X, the protective component 40 is located within the top wall 111 along the third direction Z, reducing the space occupied by the protective component 40 in the third direction Z.

[0085] Please see Figures 17 to 22In some embodiments, the protection component 40 includes an overheat protection element 41, which includes a body portion 411 and a first connecting portion 412 and a second connecting portion 413 connected to the body portion 411. The first connecting portion 412, the second connecting portion 413 and the body portion 411 are arranged along a second direction Y.

[0086] In some embodiments, the body portion 411 is configured to collect the temperature of the battery cell 10. Along the first direction X, the body portion 411 abuts against the side of the first section 112a away from the top wall 111, which facilitates accurate collection of the temperature of the battery cell 10.

[0087] In some embodiments, the protection component 40 includes a first electrical connector 42, which connects the first connection portion 412 and the circuit board 20.

[0088] In some embodiments, the first electrical connector 42 includes a first electrical connection segment 421 and a second electrical connection segment 422, with the first electrical connection segment 421 connected to the second electrical connection segment 422. A first connection portion 412 is stacked and connected to the first electrical connection segment 421 along a first direction X. The second electrical connection segment 422 is stacked and connected to the circuit board 20 along the thickness direction of the circuit board 20.

[0089] In some embodiments, the protection component 40 includes a second electrical connector 43, and the electrode terminal 12 includes a first terminal 121 extending from the first segment 112a. The second electrical connector 43 is connected to the second connection portion 413 and the first terminal 121.

[0090] In some embodiments, electrode terminal 12 includes a second terminal 122, which is connected to circuit board 20. Along the third direction Z, second electrical connection segment 422 and second terminal 122 are soldered to the same side of circuit board 20.

[0091] In some embodiments, the first terminal 121 includes a first sub-part 121a and a second sub-part 121b, the first sub-part 121a extending from the first segment 112a, and the second sub-part 121b connected to the first sub-part 121a. Along the first direction X, the second sub-part 121b, the second connecting portion 413, and the second electrical connector 43 are stacked and connected.

[0092] Please see Figure 14 In some embodiments, the second electrical connector 43 includes a third electrical connector segment 431, which is bonded to the first segment 112a. Along the first direction X, the second connector 413 is located between the second sub-part 121b and the third electrical connector segment 431. The second sub-part 121b connects the second connector 413 and the third electrical connector segment 431.

[0093] In some embodiments, the second electrical connector 43 is folded and includes two third electrical connector segments 431, one of which is bonded to the first segment 112a. Along the first direction X, the second connection portion 413 is located between the two third electrical connector segments 431, and the second sub-part 121b connects to the other third electrical connector segment 431 on the side opposite to the second connection portion 413.

[0094] Please see Figure 18 and Figure 19 In some embodiments, the battery module 100 includes a first insulating member 103. Along the first direction X, the first insulating member 103 at least covers the first sub-part 121a, the overheat protection member 41, the first electrical connection section 421, and the first section 112a, which is beneficial for insulation.

[0095] In some embodiments, along the first direction X, the second connection portion 413 is located between the first insulating member 103 and the first electrical connection segment 421.

[0096] Please see Figure 14 In some embodiments, along the first direction X, there is a first gap H1 between the overheat protection component 41 and the circuit board 20, where 0.1mm≤H1≤2mm, to reduce the risk of the circuit board 20 touching the overheat protection component 41 and causing damage to the overheat protection component 41.

[0097] Optionally, H1 can be any one or any combination of two of the following: 0.1mm, 0.2mm, 0.3mm, 0.4mm, 0.5mm, 0.6mm, 0.7mm, 0.8mm, 0.9mm, 1.0mm, 1.1mm, 1.2mm, 1.3mm, 1.4mm, 1.5mm, 1.6mm, 1.7mm, 1.8mm, 1.9mm, and 2.0mm.

[0098] In some embodiments, 0.3mm≤H1≤1.5mm reduces the risk of the circuit board 20 touching the overheat protection component 41 and causing damage to the overheat protection component 41, and reduces the space occupied by the circuit board 20 along the first direction X, thereby improving space utilization.

[0099] In some embodiments, the circuit board 20 includes a notch 20b. When viewed along the third direction Z, the notch 20b and the overheat protection element 41 are spaced apart relative to each other along the first direction X. The notch 20b can accommodate part of the overheat protection element 41, further reducing the risk that the circuit board 20 may come into contact with the overheat protection element 41 and cause damage to the overheat protection element 41.

[0100] Please see Figures 12 to 16In some embodiments, the frame 30 includes a reinforcing section 34 connected to the second connecting section 32. Along the first direction X, a portion of the reinforcing section 33 is located between the cell housing 11 and the circuit board 20, providing insulation protection for the cell 10 and the circuit board 20, which helps reduce the risk of edge damage or puncture of the first seal 112 of the circuit board 20.

[0101] The difference between the frame 30 in this embodiment and the frame 30 in the first embodiment is that the reinforcing segment 34 includes a first segment 341 and a second segment 342 spaced apart along the second direction Y. The first segment 341 connects to one of the second connecting segments 32, and the second segment 342 connects to the other adjacent second connecting segment 32.

[0102] In some embodiments, the first segment 341 includes a first sub-segment 341a along the first direction X. The first sub-segment 341a is located on the side of the first protrusion 11a away from the top wall 111, which helps to reduce the risk of damage to the first protrusion 11a.

[0103] In some embodiments, the first segment 341 includes a second sub-segment 341b, which is connected to the first sub-segment 341a. The second sub-segment 341b is located between the first segment 112a and the circuit board 20 and in the first space 10a, which is beneficial to improving space utilization.

[0104] In some embodiments, the second segment 342 includes a third sub-segment 342a, which is located between another first protrusion 11a of the same battery cell 10 and the circuit board 20, reducing the risk of damage to the first protrusion 11a. In some embodiments, the second segment 342 includes a fourth sub-segment 342b, which connects to the third sub-segment 342a. The fourth sub-segment 342b is located between the first segment 112a and the circuit board 20 and is situated in the first space 10a, which helps to improve space utilization.

[0105] In some embodiments, viewed along a third direction Z, the main body 411 is located between the first segment 341 and the second segment 342 along the second direction Y, i.e., there is a gap between the first segment 341 and the second segment 342, and the main body 411 is located in the gap. By spaced apart by the first segment 341 and the second segment 342, the main body 411 is disposed between the first segment 341 and the second segment 342, so that the main body 411, the first segment 341 and the second segment 342 share the first space 10a, which is beneficial to improving space utilization.

[0106] Optionally, when viewed along the third direction Z, the main body 411 is located between the second sub-segment 341b and the fourth sub-segment 342b along the second direction Y.

[0107] In some embodiments, along the first direction X, the projection of the body portion 411 is separate from the projection of the first segment 341, and the projection of the body portion 411 is separate from the projection of the second segment 342.

[0108] Please see Figure 14 and Figure 15 In some embodiments, along the first direction X, the thickness H2 of the reinforcing section 34 is 0.4mm≤H2≤1.2mm, which achieves insulation of the battery cell 10 and the circuit board 20, and reduces the space occupied by the reinforcing section 34, thereby improving space utilization.

[0109] Optionally, H2 can be any one or any combination of two of the following: 0.4mm, 0.5mm, 0.6mm, 0.7mm, 0.8mm, 0.9mm, 1.0mm, 1.1mm, 1.2mm, 1.3mm, 1.4mm, 1.5mm, 1.6mm, 1.7mm, 1.8mm, 1.9mm, and 2.0mm.

[0110] Please see Figures 23 to 29 The third embodiment of this application provides a battery module 100, which differs from the first embodiment in that the battery module 100 includes a protection component 40. The protection component 40 includes an overheat protection element 41, which includes a body portion 411 and a first connecting portion 412 and a second connecting portion 413 connected to the body portion 411.

[0111] In some embodiments, the first connecting portion 412 is stacked and connected to the circuit board 20 along the thickness direction of the circuit board 20.

[0112] In some embodiments, the second connection portion 413 is stacked and connected to the circuit board 20 along the thickness direction of the circuit board 20.

[0113] Please see Figure 27 In some embodiments, the circuit board 20 includes a first receiving groove 20c having a first opening 202 facing the first segment 112a. The body portion 411 includes a length direction, a width direction, and a thickness direction, with the thickness direction of the body portion 411 being the direction of minimum extension. The thickness direction of the body portion 411 is parallel to the thickness direction of the circuit board 20. The body portion 411 is disposed in the first receiving groove 20c, reducing the space occupied by the overheat protection member 41 along the third direction Z, reducing the risk of the overheat protection member 41 protruding from the circuit board 20 along the third direction Z, and improving space utilization and the energy density of the battery module 100.

[0114] Please see Figure 26In some embodiments, a portion of the first accommodating groove 20c and the body portion 411 are located in the first space 10a. Based on improving space utilization, the depth of the first accommodating groove 20c is reduced along the first direction X, thereby reducing the impact of the depth of the first accommodating groove 20c on the structural strength and performance of the circuit board 20.

[0115] Please see Figure 23 , Figure 28 and Figure 29 In some embodiments, along the thickness direction of the circuit board 20, the electrode terminal 12 is connected to one side of the circuit board 20, and the first connection portion 412 and the second connection portion 413 are connected to the other side of the circuit board 20, thereby reducing interference between the electrode terminal 12 and the first connection portion 412 and the second connection portion 413.

[0116] In some embodiments, electrode terminals 12 are welded to circuit board 20, and first connecting portion 412 and second connecting portion 413 are welded to circuit board 20. Optionally, the welding method includes laser welding, thermoforming welding, reflow welding, and ultrasonic welding.

[0117] Please see Figure 29 In some embodiments, the circuit board 20 is provided with a plurality of soldering portions 21, and the electrode terminals 12 are soldered to the soldering portions 21.

[0118] Please see Figure 24 and Figure 25 In some embodiments, the battery module 100 includes a heat-conducting element 104, which connects the first section 112a and the body portion 411. The heat-conducting element 104 transfers the temperature of the battery cell 10 to the body portion 411, which is beneficial for the body portion 411 to collect the temperature of the battery cell 10.

[0119] In some embodiments, the thermal conductive element 104 includes thermally conductive adhesive 104a. Along the thickness direction of the circuit board 20, the thermally conductive adhesive 104a covers the surface of the body portion 411. Along the first direction X, the thermally conductive adhesive 104a fills the gap between the first section 112a and the body portion 411, which is beneficial for accurately collecting the temperature of the battery cell 10.

[0120] Please see Figure 26 In some embodiments, the frame 30 includes a reinforcing section 35 connected to the second connecting section 32. Along the first direction X, a portion of the reinforcing section 33 is located between the cell housing 11 and the circuit board 20, providing insulation protection for the cell 10 and the circuit board 20, which helps reduce the risk of edge damage or puncture of the first seal 112 of the circuit board 20.

[0121] The difference between the frame 30 in this embodiment and the frame 30 in the first embodiment is that the reinforcing segment 35 includes a first segment 351 and a second segment 352 spaced apart along the second direction Y. The first segment 351 connects to one of the second connecting segments 32, and the second segment 352 connects to the other adjacent second connecting segment 32.

[0122] In some embodiments, the first segment 351 includes a first sub-segment 351a along a first direction X, the first sub-segment 351a being located on the side of the first protrusion 11a away from the top wall 111.

[0123] In some embodiments, the first segment 351 includes a second sub-segment 351b, which is connected to the first sub-segment 351a. The second sub-segment 351b is located between the first segment 112a and the circuit board 20, and is located in the first space 10a.

[0124] In some embodiments, the second segment 352 includes a third sub-segment 352a, which is located between another first protrusion 11a of the same cell 10 and the circuit board 20.

[0125] In some embodiments, the second segment 352 includes a fourth sub-segment 352b, which is connected to the third sub-segment 352a. The fourth sub-segment 352b is located between the first segment 112a and the circuit board 20, and is located in the first space 10a.

[0126] In some embodiments, viewed along the third direction Z, the heat-conducting element 104 is located between the first segment 351 and the second segment 352 along the second direction Y. By spaced apart by the first segment 351 and the second segment 352, the heat-conducting element 104 is disposed between the first segment 351 and the second segment 352, so that the heat-conducting element 104, the first segment 351 and the second segment 352 share the first space 10a, which is beneficial to improving space utilization.

[0127] Optionally, viewed along the third direction Z, along the second direction Y, the heat conductor 104 is located between the second sub-segment 351b and the fourth sub-segment 352b.

[0128] Please see Figure 27 In some embodiments, along the first direction X, the projection of the heat-conducting element 104 is separate from the projection of the first segment 351, and the projection of the heat-conducting element 104 is separate from the projection of the second segment 352.

[0129] In some embodiments, along the first direction X, the thickness H3 of the reinforcing section 35 is 0.4mm≤H3≤1.2mm, which achieves insulation of the battery cell 10 and the circuit board 20, and reduces the space occupied by the reinforcing section 35, thereby improving space utilization.

[0130] Optionally, H3 can be any one or any combination of two of the following: 0.4mm, 0.5mm, 0.6mm, 0.7mm, 0.8mm, 0.9mm, 1.0mm, 1.1mm, 1.2mm, 1.3mm, 1.4mm, 1.5mm, 1.6mm, 1.7mm, 1.8mm, 1.9mm, and 2.0mm.

[0131] Please see Figure 30 This application also provides an electrical device 200 employing the aforementioned battery module 100. In one embodiment, the electrical device 200 of this application may be, but is not limited to, electronic products such as laptops and mobile phones, drones, electric vehicles, electric motorcycles, electric-assisted bicycles, power tools, etc.

[0132] Those skilled in the art should recognize that the above embodiments are merely illustrative of this application and are not intended to limit this application. Any appropriate changes and variations made to the above embodiments within the spirit and essence of this application fall within the scope of this application's disclosure.

Claims

1. A battery module, characterized in that, include: A battery cell includes a battery cell housing, an electrode assembly, and electrode terminals. The electrode assembly is disposed within the battery cell housing. The battery cell housing includes a top wall, a side wall, a first sealing portion, and a second sealing portion. The first sealing part is connected to the top wall. The first sealing part includes a first section. The first section is bent toward the top wall and is disposed opposite to the top wall along a first direction, which is perpendicular to the top wall. One end of the electrode terminal is connected to the electrode assembly, and the other end of the electrode terminal extends out from the first section. The second sealing part is connected to the side wall, and the second sealing part is bent toward the side wall and disposed opposite to the side wall in a second direction; The second sealing part connects to the first sealing part and forms a first protrusion. Along the first direction, the first protrusion protrudes from the top wall, and the first protrusion and the first section enclose a first space. A circuit board connected to the electrode terminals, the circuit board including electronic components, a portion of the circuit board being disposed in the first space, and the thickness direction of the circuit board being perpendicular to the first direction.

2. The battery module as described in claim 1, characterized in that, The electrode terminal includes a first terminal that extends from the first segment; The battery module also includes a protection component, which includes an overheat protection component, a first electrical connector, and a second electrical connector. The overheat protection component includes a body portion and a first connecting portion and a second connecting portion connected to the body portion. The first connecting portion, the body portion, and the second connecting portion are arranged along a second direction. Along the first direction, the body portion abuts against the side of the first section away from the top wall. The first electrical connector is connected to the first connecting portion and the circuit board, and the second electrical connector is connected to the second connecting portion and the first terminal.

3. The battery module as described in claim 2, characterized in that, Along the first direction, there is a first gap between the overheat protection component and the circuit board, wherein the first gap H1 is 0.1mm≤H1≤2mm.

4. The battery module as described in claim 2, characterized in that, The first terminal includes a first sub-part and a second sub-part, the first sub-part extending from the first section, and the second sub-part connected to the first sub-part; The second sub-part, the second connecting part, and the second electrical connector are stacked and connected along the first direction; The first electrical connector includes a first electrical connection segment and a second electrical connection segment connected to the first electrical connection segment. The first connection segment is stacked and connected to the first electrical connection segment along the first direction, and the second electrical connection segment is stacked and connected to the circuit board along the thickness direction of the circuit board.

5. The battery module as described in claim 4, characterized in that, The battery module further includes a first insulating member, which covers at least the first sub-part, the overheat protection member, the first electrical connection segment, and the first section along the first direction.

6. The battery module as described in claim 1, characterized in that, It also includes a protection component, which includes an overheat protection element. The overheat protection element includes a body portion and a first connection portion and a second connection portion connected to the body portion. The first connection portion is stacked and connected to the circuit board along the thickness direction of the circuit board, and the second connection portion is stacked and connected to the circuit board along the thickness direction of the circuit board. The circuit board includes a first receiving groove, the first receiving groove having a first opening facing the first section, and the body portion is disposed in the first receiving groove; The thickness direction of the body portion is parallel to the thickness direction of the circuit board, and a portion of the body portion is located in the first space.

7. The battery module as described in claim 6, characterized in that, Along the thickness direction of the circuit board, the electrode terminal is connected to one side of the circuit board, and the first connection portion and the second connection portion are connected to the other side of the circuit board.

8. The battery module as described in claim 7, characterized in that, It also includes a heat-conducting element that connects the first section and the body portion, the body portion being configured to collect the temperature of the battery cell.

9. The battery module as described in claim 8, characterized in that, The thermally conductive component includes thermally conductive adhesive, which covers the surface of the body portion along the thickness direction of the circuit board, and fills the gap between the first section and the body portion along the first direction.

10. The battery module as described in claim 1, characterized in that, The first sealing portion further includes two second sections, which are respectively connected to the two ends of the first section along a second direction, wherein the first direction is perpendicular to the second direction; Each of the second sealing portions includes a body sealing portion and an extension sealing portion. Along the second direction, the body sealing portion overlaps with the sidewall, and the extension sealing portion connects to the second section and forms the first protrusion. The battery module includes two or more battery cells arranged along the second direction. The circuit board includes a second receiving groove with a second opening facing the first protrusion. Along the second direction, adjacent first protrusions of different battery cells extend into the second receiving groove from the second opening.

11. The battery module as described in claim 2 or 6, characterized in that, It also includes a frame, and when viewed along the thickness direction of the battery cell, the battery cell housing is located within the frame; The frame includes a reinforcing section located between the battery cell housing and the circuit board along the first direction. The reinforcing section includes a first section and a second section spaced apart along the second direction. The first segment includes a first sub-segment and a second sub-segment. Along the first direction, the first sub-segment is located on the side of the first protrusion away from the top wall, and the second sub-segment is located between the first segment and the circuit board. The second segment includes a third sub-segment and a fourth sub-segment. Along the first direction, the third sub-segment is located between another first protrusion of the same cell and the circuit board, and the fourth sub-segment is located between the first segment and the circuit board. Viewed along the thickness direction of the battery cell, the body portion is located between the first segment and the second segment along the second direction.

12. The battery module as described in claim 1, characterized in that, The battery module includes multiple cells arranged along a second direction, and a portion of the circuit board is disposed within a first space of each cell, wherein the first direction is perpendicular to the second direction.

13. The battery module as described in claim 1, characterized in that, The battery module includes a first cell group and a second cell group arranged along the first direction. The first and second battery cell groups each include at least one battery cell. Along the first direction, one side of the circuit board is disposed in a first space of one of the first battery cell groups, and the other side is disposed in a first space of the second battery cell group.

14. An electrical appliance, characterized in that, Includes the battery module as described in any one of claims 1 to 13.

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