Battery module and electric equipment

Abstract

The invention discloses a battery module and electric equipment. The battery module comprises a battery cell and a circuit board, the battery cell comprises a battery cell shell, an electrode assembly and an electrode terminal, wherein 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 with the top wall, the first sealing part comprises a first section, the first section is bent towards the top wall and is arranged opposite to the top wall along a first direction, the first direction is a direction perpendicular to the top wall, one end of the electrode terminal is connected with the electrode assembly, and the other end of the electrode terminal extends out of the first section. The second sealing part is connected with the side wall, is bent towards the side wall and is opposite to the side wall in the second direction. The second sealing part is connected with the first sealing part and forms a first protruding part, the first protruding part protrudes out of the top wall in the first direction, and a first space is defined by the first protruding part and the first section. The circuit board is connected with the electrode terminals, part of the circuit board is arranged in the first space, the thickness direction of the circuit board is perpendicular to the first direction, and the space utilization rate and the energy density are improved.

Description

Technical Field

[0001] The present application relates to the field of energy storage technology, and in particular to a battery module and electrical equipment. Background Art

[0002] As battery modules become increasingly popular in mobile device electronics and the electric vehicle market, the demand for battery module endurance is becoming more and more urgent. Improving the energy density of battery modules has become a goal that the industry has always pursued. Summary of the invention

[0003] In view of this, it is necessary to provide a battery module and electrical equipment to improve space utilization and energy density.

[0004] The embodiment of the present application provides a battery module, including a battery cell and a circuit board. The battery cell includes a battery cell shell, an electrode assembly and an electrode terminal. The electrode assembly is arranged in the battery cell shell. The battery cell shell includes 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, and the first sealing part includes a first section. The first section is bent toward the top wall and arranged opposite to the top wall along a first direction. The first direction 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 toward the side wall and arranged opposite to the side wall along a second direction. The second sealing part is connected to the first sealing part and forms a first convex part. Along the first direction, the first convex part protrudes from the top wall. The first convex part and the first section are surrounded to form a first space. The circuit board is connected to the electrode terminal, and part of the circuit board is arranged in the first space. The thickness direction of the circuit board is perpendicular to the first direction. The first space is formed by the first convex part and the first section. Part of the circuit board is arranged in the first space. The space occupied by the circuit board is reduced along the first direction, and the space utilization rate and the energy density of the battery are improved. The thickness direction of the circuit board is perpendicular to the first direction, which can improve the situation where the circuit board exceeds the battery cell shell in the thickness direction of the battery module due to the tilted setting of the circuit board, which is beneficial to reducing the risk of excessive thickness of the battery head; under normal use, drop test, vibration and other working conditions, the thickness direction of the circuit board is perpendicular to the first direction, which is beneficial to increase the contact area between the end face of the circuit board relative to the battery cell and the first sealing part along the first direction, and reduce the risk of the edge of the circuit board crushing or puncturing the first sealing part; after the battery module is installed on the electrical equipment, the thickness direction of the circuit board is perpendicular to the first direction, which is beneficial to increase the contact area between the end of the circuit board away from the battery cell and the electrical equipment along the first direction, and reduce the risk of collision between the circuit board and the electrical equipment, deformation of the circuit board involving the electrode terminal, and causing the electrode terminal to break.

[0005] Optionally, in some embodiments of the present application, the electrode terminal includes a first terminal, and the first terminal extends from the first section. The battery module also includes a protection component, and the protection component includes an overheat protection member, a first electrical connector, and a second electrical connector. The overheat protection member includes a main body and a first connection portion and a second connection portion connected to the main body. The first connection portion, the main body, and the second connection portion are arranged along the second direction. Along the first direction, the main body abuts against the side of the first section away from the top wall, which is conducive to accurately collecting the temperature of the battery cell. The first electrical connector is connected to the first connection portion and the circuit board, and the second electrical connector is connected to the second connection portion and the first terminal.

[0006] Optionally, in some embodiments of the present application, along the first direction, there is a first gap between the overheat protection element and the circuit board, the first gap H1, 0.1mm≤H1≤2mm, reducing the risk of the circuit board touching the overheat protection element and causing damage to the overheat protection element.

[0007] Optionally, in some embodiments of the present application, the first terminal includes a first sub-portion and a second sub-portion, the first sub-portion extends from the first section, and the second sub-portion is connected to the first sub-portion. The second sub-portion, the second connecting portion, and the second electrical connector are connected in a stacked manner along a first direction. The first electrical connector includes a first electrical connection section and a second electrical connection section connected to the first electrical connection section, the first connecting portion is connected in a stacked manner along the first direction, and the second electrical connection section is connected in a stacked manner to the circuit board along a thickness direction of the circuit board.

[0008] Optionally, in some embodiments of the present application, the battery module further includes a first insulating member, and along the first direction, the first insulating member at least covers the first sub-portion, the overheat protection member, the first electrical connection section and the first section.

[0009] Optionally, in some embodiments of the present application, a protection component is further included, the protection component includes an overheating protection member, the overheating protection member includes a main body and a first connection portion and a second connection portion connected to the main body, the first connection portion is connected to the circuit board in a stacked manner along the thickness direction of the circuit board, and the second connection portion is connected to the circuit board in a stacked manner along the thickness direction of the circuit board. The circuit board includes a first accommodating groove, the first accommodating groove has a first opening facing the first section, the main body is arranged in the first accommodating groove, the space occupied by the overheating protection member along the first direction is reduced, it is beneficial for more parts of the circuit board to be arranged in the first space, and the space utilization rate and the energy density of the battery are improved. The thickness direction of the main body is parallel to the thickness direction of the circuit board, and part of the main body is located in the first space. On the basis of improving the space utilization rate, the depth of the first accommodating groove is reduced along the first direction, and the influence of the depth of the first accommodating groove on the structural strength and performance of the circuit board is reduced.

[0010] Optionally, in some embodiments of the present application, along the thickness direction of the circuit board, the electrode terminal is connected to one side of the circuit board, and the first connection part and the second connection part are connected to the other side of the circuit board, thereby reducing interference between the electrode terminal and the first connection part and the second connection part.

[0011] Optionally, in some embodiments of the present application, a heat conductor is further included, the heat conductor connects the first section and the main body, and the main body is configured to collect the temperature of the battery cell. The temperature of the battery cell is transferred to the main body through the heat conductor, which is conducive to the main body collecting the temperature of the battery cell.

[0012] Optionally, in some embodiments of the present application, the heat conductive component includes thermal conductive adhesive, and the thermal conductive adhesive covers the surface of the main body along the thickness direction of the circuit board, and fills the gap between the first section and the main body along the first direction, which is conducive to accurately collecting the temperature of the battery cell.

[0013] Optionally, in some embodiments of the present application, the first sealing portion also includes two second sections, and the two second sections are respectively connected to the two ends of the first section along the second direction, and the first direction is perpendicular to the second direction. Each second sealing portion includes a main body sealing portion and an extended sealing portion. Along the second direction, the main body sealing portion overlaps with the side wall, and the extended sealing portion connects the second section to form a first convex portion. The battery module includes more than two battery cells, and the battery cells are arranged along the second direction. The circuit board includes a second accommodating groove, and the second accommodating groove has a second opening facing the first convex portion. Along the second direction, the adjacent first convex portions of different battery cells extend from the second opening into the second accommodating groove, which is beneficial to reduce the space occupied by the battery module along the first direction and improve space utilization.

[0014] Optionally, in some embodiments of the present application, a frame is further included, and the battery cell housing is located in the frame when viewed along the thickness direction of the battery cell. The frame includes a reinforcement section, and the reinforcement section is located between the battery cell housing and the circuit board along the first direction, and the reinforcement section includes a first section and a second section arranged at intervals along the second direction. The first section includes a first subsection and a second subsection, and along the first direction, the first subsection is located on the side of the first protrusion away from the top wall, and the second subsection is located between the first section and the circuit board. The second section includes a third subsection and a fourth subsection, and along the first direction, the third subsection is located between another first protrusion of the same battery cell and the circuit board, and the fourth subsection is located between the first section and the circuit board. When viewed along the thickness direction of the battery cell, along the second direction, the main body is located between the first section and the second section. The first section and the second section are arranged at intervals, and the main body is arranged between the first section and the second section, so that the main body, the first section and the second section share the first space, which is conducive to improving space utilization.

[0015] Optionally, in some embodiments of the present application, the battery module includes a plurality of battery cells arranged along a second direction, a portion of the circuit board is disposed in a first space of each battery cell, and the first direction is perpendicular to the second direction.

[0016] Optionally, in some embodiments of the present application, the battery module includes a first battery cell group and a second battery cell group arranged along a first direction. The first battery cell group and the second battery cell group each include at least one battery cell, and along the first direction, one side of the circuit board is disposed in the first space of one of the first battery cell groups, and the other side is disposed in the first space of the second battery cell group.

[0017] An embodiment of the present application provides an electrical device, comprising the battery module in any one of the above embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 A schematic diagram of the structure of a battery module in the first embodiment of the present application is shown.

[0019] Figure 2 A schematic structural diagram of the battery module from another perspective in the first embodiment of the present application is shown.

[0020] Figure 3 Shows this application Figure 1 Schematic diagram of the cross section along AA.

[0021] Figure 4 Shows this application Figure 2 Schematic diagram of the cross section along BB.

[0022] Figure 5 Shows this application Figure 4 A magnified schematic diagram of the middle part of the structure.

[0023] Figure 6 A structural schematic diagram showing another arrangement of battery cells in the first embodiment of the present application is shown.

[0024] Figure 7 A schematic diagram of the structure of the battery cell in the first embodiment of the present application is shown.

[0025] Figure 8 A schematic structural diagram of a battery cell in another state in the first embodiment of the present application is shown.

[0026] Fig. 9 Shows this application Figure 8 Schematic diagram of the structure of the battery cell from another perspective.

[0027] Fig.10 A schematic structural diagram of a battery module in a second embodiment of the present application is shown.

[0028] Fig.11 A schematic structural diagram of a battery module from another perspective in the second embodiment of the present application is shown.

[0029] Fig.12 Shows this application Fig.10Schematic diagram of the cross section along CC.

[0030] Fig.13 Shows this application Fig.12 A magnified schematic diagram of the middle part of the structure.

[0031] Fig.14 Shows this application Fig.12 A magnified schematic diagram of the middle part of the structure.

[0032] Fig.15 Shows this application Fig.12 A magnified schematic diagram of the middle part of the structure.

[0033] Fig.16 A schematic structural diagram of a frame body in a second embodiment of the present application is shown.

[0034] Fig.17 A schematic diagram of the structure of the battery cell and the protection assembly in the second embodiment of the present application is shown.

[0035] Fig.18 A schematic diagram of the structure of the battery cell and the protection assembly from another perspective in the second embodiment of the present application is shown.

[0036] Fig.19 A schematic diagram of an exploded view of a battery cell and a protection assembly in a second embodiment of the present application is shown.

[0037] Fig. 20 Shows this application Fig.18 Schematic diagram of the cross section along DD.

[0038] Fig.21 Shows this application Fig. 20 A magnified schematic diagram of the middle part of the structure.

[0039] Fig. 22 A schematic structural diagram of a thermal protection element in a second embodiment of the present application is shown.

[0040] Fig.23 A schematic structural diagram of a battery module in the third embodiment of the present application is shown.

[0041] Fig.24 Shows this application Fig.23 Schematic diagram of the cross section along EE.

[0042] Fig.25 Shows this application Fig.24 A magnified schematic diagram of the middle part of the structure.

[0043] Fig.26 Shows this application Fig.23 Schematic cross-section diagram of .

[0044] Fig. 27 Shows this application Fig.26 A magnified schematic diagram of the middle part of the structure.

[0045] Fig.28 A schematic diagram of the structure of a circuit board and a thermal protection component in the third embodiment of the present application is shown.

[0046] Fig.29 A schematic structural diagram of a circuit board and a thermal protection component from another viewing angle in the third embodiment of the present application is shown.

[0047] Fig.30 A simplified schematic diagram of electrical equipment in some embodiments of the present application is shown.

[0048] Description of main component symbols:

[0049] Battery module 100

[0050] Battery 10

[0051] First space 10a

[0052] The first battery cell group 110

[0053] The second battery cell group 120

[0054] Battery shell 11

[0055] first convex portion 11a

[0056] Top wall 111

[0057] First sealing portion 112

[0058] First section 112a

[0059] Second section 112b

[0060] Side wall 113

[0061] Second sealing portion 114

[0062] Main body sealing portion 114a

[0063] Extended sealing portion 114b

[0064] Electrode terminal 12

[0065] First terminal 121

[0066] The first sub-portion 122a

[0067] The second sub-section 122b

[0068] Second terminal 122

[0069] Circuit board 20

[0070] The second accommodating groove 20a

[0071] Second opening 201

[0072] Gap 20b

[0073] First accommodating groove 20c

[0074] First opening 202

[0075] Welding part 21

[0076] Frame 30

[0077] The first connecting section 31

[0078] The second connecting section 32

[0079] Reinforced sections 33, 34, 35

[0080] Section 1 331, 341, 351

[0081] Second paragraph 332, 342, 352

[0082] First sub-segments 341a, 351a

[0083] Second sub-segments 341b, 351b

[0084] Third sub-segments 342a, 352a

[0085] Fourth sub-segments 342b, 352b

[0086] The third connecting section 301

[0087] Protection component 40

[0088] Overheat protection element 41

[0089] Main body part 411

[0090] First connection portion 412

[0091] Second connection portion 413

[0092] First electrical connection member 42

[0093] The first electrical connection section 421

[0094] The second electrical connection section 422

[0095] Second electrical connection member 43

[0096] The third electrical connection section 431

[0097] First adhesive member 101

[0098] Second adhesive member 102

[0099] First insulating member 103

[0100] Heat conducting element 104

[0101] Thermal conductive adhesive 104a

[0102] Electrical equipment 200

[0103] First direction X

[0104] Second direction Y

[0105] The third direction Z

[0106] The following specific embodiments will further illustrate the present application in conjunction with the above-mentioned drawings. DETAILED DESCRIPTION

[0107] The technical solutions in the embodiments of the present application will be described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all of the embodiments.

[0108] When a component is considered to be “provided on” another component, it can be directly provided on the other component or there may be a component in between. When a component is considered to be “connected to” another component, it can be directly connected to the other component or there may be a component in between.

[0109] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art to which this application belongs. The terms used herein in the specification of this application are only for the purpose of describing specific embodiments and are not intended to limit this application. The term "or / and" used herein includes any and all combinations of one or more related listed items.

[0110] It can be understood that the term "perpendicular" is used to describe an ideal state between two components. In actual production or use, there may be a state that is approximately perpendicular or equal to each other between the two components. For example, in combination with numerical descriptions, perpendicularity can refer to the angle between two straight lines being between 90°±10°, perpendicularity can also refer to the dihedral angle between two planes being between 90°±10°, and perpendicularity can also refer to the angle between a straight line and a plane being between 90°±10°. The two components described as "perpendicular" may not be absolute straight lines or planes, but may be roughly straight lines or planes. From a macroscopic perspective, a component can be considered a "straight line" or a "plane" if the overall extension direction is a straight line or a plane.

[0111] The term "parallel" is used to describe an ideal state between two components. In actual production or use, two components may be approximately parallel. For example, combined with numerical descriptions, parallel can refer to the angle between two straight lines being between 180°±10°, parallel can also refer to the dihedral angle between two planes being between 180°±10°, and parallel can also refer to the angle between a straight line and a plane being between 180°±10°. The two components described as "parallel" may not be absolute straight lines or planes, but may be roughly straight lines or planes. From a macroscopic perspective, a component can be considered a "straight line" or a "plane" if the overall extension direction is a straight line or a plane.

[0112] Unless otherwise defined, when the term "plurality" is used to describe the number of components, it specifically means that the components are two or more.

[0113] Some embodiments of the present application are described in detail below in conjunction with the accompanying drawings. In the absence of conflict, the following embodiments and features in the embodiments can be combined with each other.

[0114] See also Figures 1 to 9 The first embodiment of the present application provides a battery module 100, including a battery cell 10, wherein the battery cell 10 includes a battery cell housing 11, an electrode assembly (not shown) and an electrode terminal 12. The electrode assembly is disposed in the battery cell housing 11.

[0115] In some embodiments, the battery cell housing 11 includes a top wall 111 and a first sealing portion 112, and the first sealing portion 112 is connected to the top wall 111. The first sealing portion 112 includes a first section 112a, and the first section 112a is bent toward the top wall 111 and arranged opposite to the top wall 111 along a first direction X. One end of the electrode terminal 12 is connected to the electrode assembly, and the other end extends from the first section 112a. The first direction X is a direction perpendicular to the top wall 111.

[0116] In some embodiments, the cell housing 11 includes a side wall 113 and a second sealing portion 114 . The second sealing portion 114 is bent toward the side wall 113 and is disposed opposite to the side wall 113 along the second direction Y.

[0117] In some embodiments, the second sealing portion 114 is connected to the first sealing portion 112 to form a first protrusion 11 a. Along the first direction X, the first protrusion 11 a protrudes from the top wall 111. The first protrusion 11 a and the first section 112 a enclose a first space 10 a.

[0118] 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 10 a , and a thickness direction of the circuit board 20 is perpendicular to the first direction X.

[0119] Optionally, the circuit board 20 includes a BMS component (Battery Management System), which includes multiple electronic components. The multiple electronic components can realize functions such as control, protection, communication, power calculation, signal transmission, and power transmission of the battery cell 10.

[0120] Optionally, the circuit board 20 includes a flexible printed circuit (FPC). Optionally, the circuit board 20 includes a printed circuit board (PCB).

[0121] In the present application, the first space 10a is formed by enclosing the first protrusion 11a and the first section 112a. Part of the circuit board 20 is arranged in the first space 10a, which reduces the space occupied by the circuit board 20 along the first direction X, thereby improving the 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 exceeds the battery cell housing 11 in the thickness direction of the battery module 100 due to the inclined setting of the circuit board 20, which is beneficial to reducing the risk of excessive thickness of the battery head; 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 is beneficial to increase the contact area between the end face of the circuit board 20 relative to the battery cell 10 and the first sealing portion 112 along the first direction X, and reduce the risk of the edge of the circuit board 20 crushing or puncturing the first sealing portion 112; after the battery module is installed on the electrical equipment, the thickness direction of the circuit board 20 is perpendicular to the first direction X, which is beneficial to increase the contact area between the end of the circuit board 20 away from the battery cell 10 and the electrical equipment along the first direction X, and reduce the risk of the circuit board 20 colliding with the electrical equipment, the deformation of the circuit board 20 involving the electrode terminal 12, and the breakage of the electrode terminal 12.

[0122] See also Figure 5 In some embodiments, the battery module 100 includes a first adhesive member 101, and the first adhesive member 101 is disposed between the top wall 111 and the first sealing portion 112. The first adhesive member 101 facilitates the bending and connection of the first sealing portion 112 to the top wall 111.

[0123] See also Figure 8 and Fig. 9 In some embodiments, the first sealing portion 112 includes two second sections 112b, and the two second sections 112b connect the two ends of the first section 112a along the second direction Y. 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 side wall 113, the body sealing portion 114a and the side wall 113 are arranged opposite to each other along the second direction Y, and the extension sealing portion 114b connects the second section 112b and forms the first convex portion 11a.

[0124] In some embodiments, the thickness direction of the battery 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.

[0125] See also Figures 1 to 3 In some embodiments, the battery module 100 includes a frame 30 , and when viewed along a third direction Z, the battery cell housing 11 is located inside the frame 30 .

[0126] In some embodiments, the frame 30 includes a first connecting segment 31 and two second connecting segments 32 spaced apart along the second direction Y, wherein the first connecting segment 31 connects the second connecting segments 32. Along the second direction Y, one battery cell 10 is disposed between two adjacent second connecting segments 32.

[0127] It is understandable that when a plurality of battery cells 10 are arranged along the second direction Y, adjacent frames 30 share one second connecting section 32 .

[0128] In some embodiments, the frame 30 includes a reinforcing section 33 . The reinforcing section 33 and the first connecting section 31 are arranged along the first direction X. The reinforcing section 33 is connected to the second connecting section 32 to form the frame 30 .

[0129] In some embodiments, along the first direction X, part of the reinforcement section 33 is located between the battery cell housing 11 and the circuit board 20 , providing insulation protection for the battery cell 10 and the circuit board 20 , which helps to reduce the risk of the edge of the circuit board 20 crushing or puncturing the first sealing portion 112 .

[0130] 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 reinforcement section 33 can be arranged between the battery cell housing 11 and the circuit board 20 from the other side of the circuit board 20 .

[0131] In some embodiments, the reinforcing section 33 includes a first section 331, a second section 332, and a third section 333 that are continuously arranged, the first section 331 is connected to one of the second connecting sections 32, and the third section 333 is connected to another adjacent second connecting section 32. Along the first direction X, the first section 331 is located on a side of the first protrusion 11a away from the top wall 111, the second section 332 is located between the first section 112a and the circuit board 20, and the third section 333 is located between another first protrusion 11a of the same battery cell 10 and the circuit board 20.

[0132] In some embodiments, the battery module 100 includes a plurality of battery cells 10, the circuit board 20 includes a second accommodating groove 20a, the second accommodating groove 20a has a second opening 201 facing the first protrusion 11a, and the adjacent first protrusions 11a of two battery cells 10 arranged side by side along the second direction Y extend from the second opening 201 into the second accommodating groove 20a, which is beneficial to reducing the space occupied by the battery module 100 along the first direction X and improving space utilization.

[0133] See also Figure 6 In some embodiments, the plurality of battery cells 10 are arranged along the second direction Y. Part of the circuit board 20 is disposed in the first space 10a of each battery cell 10. In this embodiment, along the first direction X, the circuit board 20 is provided with a second accommodating groove 20a and a second opening 201 on one side facing the plurality of battery cells 10, and adjacent first protrusions 11a of different battery cells 10 extend from the second opening 201 into the second accommodating groove 20a.

[0134] In some embodiments, the number of the second accommodating grooves 20 a is M, the number of the battery cells 10 is N, N is a natural number greater than or equal to 2, and M+1=N.

[0135] When a plurality of battery cells 10 are arranged along the second direction Y, the frame 30 includes a third connecting segment 301, and the second connecting segment 32 located at the outermost side along the second direction Y extends out the reinforcing segment 33 along the first direction X and connects the third connecting segment 301. Along the first direction X, the circuit board is located between the third connecting segment 301 and the reinforcing segment 33, the reinforcing segment 33 is located between the circuit board 20 and the battery cell 10, and the battery cell 10 is located between the reinforcing segment 33 and the first connecting segment 31. The battery cell 10 is located in a space enclosed by the first connecting segment 31, the second connecting segment 32 and the reinforcing segment 33. The circuit board 20 is located in a space enclosed by the second connecting segment 32, the third connecting segment 301 and the reinforcing segment 33.

[0136] See also Figure 3 In some embodiments, the battery module 100 includes a first battery cell group 110 and a second battery cell group 120 arranged along a first direction X, and the circuit board 20 is located between the first battery cell group 110 and the second battery cell group 120 along the first direction X. The first battery cell group 110 and the second battery cell group 120 each include at least one battery cell 10. Along the first direction X, one side of the circuit board 20 is arranged in the first space 10a of each battery cell 10 of the first battery cell group 110, and the other side is arranged in the first space 10a of each battery cell 10 of the second battery cell group 120.

[0137] In some embodiments, the first battery cell group 110 and the second battery cell group 120 each include a plurality of battery cells 10 arranged along a second direction Y, and along the first direction X, a second accommodating groove 20a and a second opening 201 are provided on the side of the circuit board 20 facing the first battery cell group 110, and a second accommodating groove 20a and a second opening 201 are provided on the side of the circuit board 20 facing the second battery cell group 120, and the first protrusions 11a adjacent to the two battery cells 10 arranged side by side along the second direction Y in the first battery cell group 110 extend from the second opening 201 into the second accommodating groove 20a, and the first protrusions 11a adjacent to the two battery cells 10 arranged side by side along the second direction Y in the second battery cell group 120 extend from the second opening 201 into the second accommodating groove 20a.

[0138] When the battery module 100 includes a first battery cell group 110 and a second battery cell group 120 arranged along a first direction X, the frame 30 includes a third connecting segment 301, and along the first direction X, the third connecting segment 301 is connected to the second connecting segment 32 located at the outermost side along the second direction Y. The first battery cell group 110 and the second battery cell group 120 are located in a space enclosed by the first connecting segment 31, the second connecting segment 32 and the reinforcing segment 33. The circuit board 20 is located in a space enclosed by the third connecting segment 301 and the reinforcing segment 33.

[0139] See also Figures 10 to 22 The second embodiment of the present application provides a battery module 100, which is different from the first embodiment in that the battery module 100 includes a protection component 40. The protection component 40 is disposed on the side of the first section 112a away from the top wall 111, and the protection component 40 connects the electrode terminal 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 reflux of the battery module 100 to protect the safety of the battery module 100.

[0140] See also Fig.19 In some embodiments, the battery module 100 includes a second adhesive member 102 , and the second adhesive member 102 is located between the protection component 40 and the first section 112 a along the first direction X. The protection component 40 is adhesively connected to the first section 112 a through the second adhesive member 102 .

[0141] See also Fig.21 In some embodiments, when viewed along the first direction X, along the third direction Z, the protection component 40 is located inside the top wall 111 , thereby reducing the space occupied by the protection component 40 in the third direction Z.

[0142] See also Figures 17 to 22In some embodiments, the protection component 40 includes an overheating protection member 41, which includes a main body 411 and a first connecting portion 412 and a second connecting portion 413 connected to the main body 411, and the first connecting portion 412, the second connecting portion 413 and the main body 411 are arranged along the second direction Y.

[0143] 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 a side of the first section 112 a away from the top wall 111 , which is conducive to accurately collecting the temperature of the battery cell 10 .

[0144] In some embodiments, the protection assembly 40 includes a first electrical connector 42 , which connects the first connection portion 412 and the circuit board 20 .

[0145] In some embodiments, the first electrical connector 42 includes a first electrical connection segment 421 and a second electrical connection segment 422, wherein the first electrical connection segment 421 is connected to the second electrical connection segment 422. The first connection portion 412 is connected to the first electrical connection segment 421 in a stacked manner along a first direction X. The second electrical connection segment 422 is connected to the circuit board 20 in a stacked manner along a thickness direction of the circuit board 20.

[0146] In some embodiments, the protection assembly 40 includes a second electrical connector 43 , the electrode terminal 12 includes a first terminal 121 , and the first terminal 121 extends from the first section 112 a . The second electrical connector 43 is connected to the second connection portion 413 and the first terminal 121 .

[0147] In some embodiments, the electrode terminal 12 includes a second terminal 122, and the second terminal 122 is connected to the circuit board 20. Along the third direction Z, the second electrical connection section 422 and the second terminal 122 are connected to the same side of the circuit board 20 by welding.

[0148] In some embodiments, the first terminal 121 includes a first sub-portion 121a and a second sub-portion 121b, wherein the first sub-portion 121a extends from the first section 112a and the second sub-portion 121b is connected to the first sub-portion 121a. Along the first direction X, the second sub-portion 121b, the second connecting portion 413 and the second electrical connector 43 are stacked and connected.

[0149] See also Fig.14 In some embodiments, the second electrical connector 43 includes a third electrical connection segment 431, which is bonded to the first segment 112a, and the second connection portion 413 is located between the second sub-portion 121b and the third electrical connection segment 431 along the first direction X. The second sub-portion 121b connects the second connection portion 413 and the third electrical connection segment 431.

[0150] In some embodiments, the second electrical connector 43 is folded and includes two third electrical connection 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 connection segments 431, and the second sub-portion 121b is connected to the side of the other third electrical connection segment 431 that is away from the second connection portion 413.

[0151] See also Fig.18 and Fig.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-portion 121a, the overheat protection member 41, the first electrical connection section 421 and the first section 112a, which is beneficial to insulation.

[0152] 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 section 421 .

[0153] See also Fig.14 In some embodiments, along the first direction X, there is a first gap H1 between the overheat protection member 41 and the circuit board 20, 0.1mm≤H1≤2mm, which reduces the risk of the circuit board 20 touching the overheat protection member 41 and causing damage to the overheat protection member 41.

[0154] Optionally, H1 can be any one of 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, or a range consisting of any two of them.

[0155] In some embodiments, 0.3 mm ≤ H1 ≤ 1.5 mm, which reduces the risk of the circuit board 20 touching the overheat protection element 41 and causing damage to the overheat protection element 41, and reduces the space occupied by the circuit board 20 along the first direction X, thereby improving space utilization.

[0156] In some embodiments, the circuit board 20 includes a notch 20b. When observed along the third direction Z, the notch 20b and the overheating protection component 41 are arranged relatively spaced apart along the first direction X. The notch 20b can accommodate part of the overheating protection component 41, further reducing the risk of the circuit board 20 touching the overheating protection component 41 and causing damage to the overheating protection component 41.

[0157] See also Figures 12 to 16In some embodiments, the frame 30 includes a reinforcing section 34, and the reinforcing section 34 is connected to the second connecting section 32. Along the first direction X, part of the reinforcing section 33 is located between the battery cell housing 11 and the circuit board 20, and the battery cell 10 and the circuit board 20 are insulated and protected, which is conducive to reducing the risk of the edge of the circuit board 20 crushing or puncturing the first sealing portion 112.

[0158] The frame 30 in this embodiment differs from the frame 30 in the first embodiment in that the reinforcing section 34 includes a first section 341 and a second section 342 spaced apart along the second direction Y, the first section 341 connects one of the second connecting sections 32 , and the second section 342 connects another adjacent second connecting section 32 .

[0159] In some embodiments, the first section 341 includes a first sub-section 341 a . Along the first direction X, the first sub-section 341 a is located on a side of the first protrusion 11 a away from the top wall 111 , which helps to reduce the risk of damage to the first protrusion 11 a .

[0160] In some embodiments, the first section 341 includes a second sub-section 341b, which is connected to the first sub-section 341a. The second sub-section 341b is located between the first section 112a and the circuit board 20 and in the first space 10a, which is beneficial to improving space utilization.

[0161] 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 is connected to the third sub-segment 342a, and is located between the first segment 112a and the circuit board 20 and in the first space 10a, which is conducive to improving space utilization.

[0162] In some embodiments, when viewed along the third direction Z, along the second direction Y, the body portion 411 is located between the first section 341 and the second section 342, that is, there is a gap between the first section 341 and the second section 342, and the body portion 411 is located in the gap. The first section 341 and the second section 342 are arranged at intervals, and the body portion 411 is arranged between the first section 341 and the second section 342, so that the body portion 411, the first section 341 and the second section 342 share the first space 10a, which is conducive to improving space utilization.

[0163] Optionally, viewed along the third direction Z, along the second direction Y, the main body portion 411 is located between the second sub-segment 341 b and the fourth sub-segment 342 b.

[0164] In some embodiments, along the first direction X, the projection of the main body 411 is separated from the projection of the first segment 341 , and the projection of the main body 411 is separated from the projection of the second segment 342 .

[0165] See also Fig.14 and Fig.15 In some embodiments, along the first direction X, the thickness H2 of the reinforcement section 34 is 0.4 mm ≤ H2 ≤ 1.2 mm, thereby achieving insulation between the battery cell 10 and the circuit board 20 and reducing the space occupied by the reinforcement section 34 to improve space utilization.

[0166] Optionally, H2 can be any one of 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, or a range consisting of any two of them.

[0167] See also Figure 23 to Figure 29 The third embodiment of the present application provides a battery module 100, which is different from the first embodiment in that the battery module 100 includes a protection component 40. The protection component 40 includes an overheat protection member 41, and the overheat protection member 41 includes a main body 411 and a first connection portion 412 and a second connection portion 413 connected to the main body 411.

[0168] In some embodiments, the first connection portion 412 is connected to the circuit board 20 in a stacked manner along a thickness direction of the circuit board 20 .

[0169] In some embodiments, the second connection portion 413 is connected to the circuit board 20 in a stacked manner along a thickness direction of the circuit board 20 .

[0170] See also Fig. 27 In some embodiments, the circuit board 20 includes a first accommodating groove 20c, the first accommodating groove 20c has a first opening 202 facing the first section 112a, the body portion 411 includes a length direction, a width direction and a thickness direction, and the thickness direction of the body portion 411 is the extension direction of the smallest size of the body portion 411. The thickness direction of the body portion 411 is parallel to the thickness direction of the circuit board 20, and the body portion 411 is arranged in the first accommodating groove 20c, which reduces the space occupied by the overheating protection member 41 along the third direction Z, reduces the risk of the size of the overheating protection member 41 protruding from the circuit board 20 along the third direction Z, and improves the space utilization and the energy density of the battery module 100.

[0171] See also Fig.26In some embodiments, the first accommodating groove 20c and part of the main body 411 are located in the first space 10a. On the basis of improving space utilization, the depth of the first accommodating groove 20c is reduced along the first direction X, thereby reducing the influence of the depth of the first accommodating groove 20c on the structural strength and performance of the circuit board 20.

[0172] See also Fig.23 , Fig.28 and Fig.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 part 412 and the second connection part 413 are connected to the other side of the circuit board 20, thereby reducing the interference between the electrode terminal 12 and the first connection part 412 and the second connection part 413.

[0173] In some embodiments, the electrode terminal 12 is welded to the circuit board 20, and the first connection portion 412 and the second connection portion 413 are welded to the circuit board 20. Optionally, the welding method includes laser welding, hot press welding, reflow welding, and ultrasonic welding.

[0174] See also Fig.29 In some embodiments, the circuit board 20 is provided with a plurality of welding portions 21 , and the electrode terminals 12 are welded and connected to the welding portions 21 .

[0175] See also Fig.24 and Fig.25 In some embodiments, the battery module 100 includes a heat conductor 104, which connects the first section 112a and the body 411. The heat conductor 104 transfers the temperature of the battery cell 10 to the body 411, which helps the body 411 collect the temperature of the battery cell 10.

[0176] In some embodiments, the heat conductive member 104 includes a thermally conductive adhesive 104a. Along the thickness direction of the circuit board 20, the thermally conductive adhesive 104a covers the surface of the main body 411. Along the first direction X, the thermally conductive adhesive 104a fills the gap between the first section 112a and the main body 411, which is conducive to accurately collecting the temperature of the battery cell 10.

[0177] See also Fig.26 In some embodiments, the frame 30 includes a reinforcement section 35, and the reinforcement section 35 is connected to the second connection section 32. Along the first direction X, part of the reinforcement section 33 is located between the battery cell housing 11 and the circuit board 20, and the battery cell 10 and the circuit board 20 are insulated and protected, which is conducive to reducing the risk of the edge of the circuit board 20 crushing or puncturing the first sealing portion 112.

[0178] The frame 30 in this embodiment is different from the frame 30 in the first embodiment in that the reinforcing section 35 includes a first section 351 and a second section 352 spaced apart along the second direction Y, the first section 351 is connected to one of the second connecting sections 32 , and the second section 352 is connected to another adjacent second connecting section 32 .

[0179] In some embodiments, the first segment 351 includes a first sub-segment 351 a . Along the first direction X, the first sub-segment 351 a is located on a side of the first protrusion 11 a away from the top wall 111 .

[0180] In some embodiments, the first segment 351 includes a second sub-segment 351 b , the second sub-segment 351 b is connected to the first sub-segment 351 a , and the second sub-segment 351 b is located between the first section 112 a and the circuit board 20 and in the first space 10 a .

[0181] In some embodiments, the second segment 352 includes a third sub-segment 352 a , and the third sub-segment 352 a is located between another first protrusion 11 a of the same battery cell 10 and the circuit board 20 .

[0182] In some embodiments, the second segment 352 includes a fourth sub-segment 352 b , the fourth sub-segment 352 b is connected to the third sub-segment 352 a , and the fourth sub-segment 352 b is located between the first segment 112 a and the circuit board 20 and in the first space 10 a .

[0183] In some embodiments, when viewed along the third direction Z, the heat conducting member 104 is located between the first section 351 and the second section 352 along the second direction Y. The first section 351 and the second section 352 are arranged at intervals, and the heat conducting member 104 is arranged between the first section 351 and the second section 352, so that the heat conducting member 104, the first section 351 and the second section 352 share the first space 10a, which is conducive to improving space utilization.

[0184] Optionally, viewed along the third direction Z, along the second direction Y, the heat conducting member 104 is located between the second sub-segment 351 b and the fourth sub-segment 352 b .

[0185] See also Fig. 27 In some embodiments, along the first direction X, the projection of the heat conductive member 104 is separated from the projection of the first section 351 , and the projection of the heat conductive member 104 is separated from the projection of the second section 352 .

[0186] In some embodiments, along the first direction X, the thickness H3 of the reinforcement section 35 is 0.4 mm ≤ H3 ≤ 1.2 mm, thereby achieving insulation between the battery cell 10 and the circuit board 20 and reducing the space occupied by the reinforcement section 35 to improve space utilization.

[0187] Optionally, H3 can be any one of 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, or a range consisting of any two of them.

[0188] See also Fig.30 The present application also provides an electric device 200 using the above battery module 100. In one embodiment, the electric device 200 of the present application can be, but is not limited to, electronic products such as laptop computers, mobile phones, drones, electric cars, electric motorcycles, electric power-assisted bicycles, electric tools, etc.

[0189] Those skilled in the art should recognize that the above embodiments are only used to illustrate the present application, and are not used as limitations on the present application. As long as they are within the spirit of the present application, appropriate changes and modifications to the above embodiments are within the scope of the present application.

Claims

1. A battery module, characterized in that: include: A battery cell, comprising a battery cell housing, an electrode assembly and an electrode terminal, wherein the electrode assembly is disposed in the battery cell housing, and the battery cell housing comprises 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, the first sealing portion includes a first section, the first section is bent toward the top wall and arranged opposite to the top wall along a first direction, the first direction 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 portion is connected to the side wall, the second sealing portion is bent toward the side wall and is arranged opposite to the side wall along a second direction; The second sealing portion is connected to the first sealing portion to form a first convex portion, the first convex portion protrudes from the top wall along the first direction, and the first convex portion and the first section are surrounded to form a first space; A circuit board is connected to the electrode terminals, a portion of the circuit board is disposed in the first space, and a thickness direction of the circuit board is perpendicular to the first direction.

2. The battery module according to claim 1, characterized in that: The electrode terminal includes a first terminal extending from the first section; The battery module further 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 main body and a first connecting part and a second connecting part connected to the main body, the first connecting part, the main body and the second connecting part are arranged along a second direction, along the first direction, the main body abuts against a side of the first section away from the top wall, the first electrical connector is connected to the first connecting part and the circuit board, and the second electrical connector is connected to the second connecting part and the first terminal.

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

4. The battery module according to claim 2, characterized in that: The first terminal includes a first sub-portion and a second sub-portion, the first sub-portion extends from the first section, and the second sub-portion is connected to the first sub-portion; The second sub-portion, the second connecting portion and the second electrical connector are connected in a stacked manner along the first direction; The first electrical connector includes a first electrical connection section and a second electrical connection section connected to the first electrical connection section, the first connection portion is stacked and connected to the first electrical connection section along the first direction, and the second electrical connection section is stacked and connected to the circuit board along the thickness direction of the circuit board.

5. The battery module according to claim 4, characterized in that: The battery module further includes a first insulating member, and along the first direction, the first insulating member at least covers the first sub-portion, the overheat protection member, the first electrical connection section, and the first section.

6. The battery module according to claim 1, characterized in that: Also included is a protection component, the protection component includes an overheat protection member, the overheat protection member includes a main body portion and a first connection portion and a second connection portion connected to the main 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 comprises a first accommodating groove, the first accommodating groove has a first opening facing the first section, and the body is disposed in the first accommodating groove; The thickness direction of the main body is parallel to the thickness direction of the circuit board, and part of the main body is located in the first space.

7. The battery module according to claim 6, characterized in that: Along a 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 according to claim 7, characterized in that: It also includes a heat conductor, which connects the first section and the main body, and the main body is configured to collect the temperature of the battery core.

9. The battery module according to claim 8, characterized in that: The heat conducting member includes heat conducting glue. Along the thickness direction of the circuit board, the heat conducting glue covers the surface of the main body. Along the first direction, the heat conducting glue fills the gap between the first section and the main body.

10. The battery module according to claim 1, characterized in that: The first sealing portion further includes two second sections, the two second sections respectively connecting two ends of the first section along a second direction, the first direction being perpendicular to the second direction; Each of the second sealing portions includes a main body sealing portion and an extended sealing portion, wherein along the second direction, the main body sealing portion overlaps with the side wall, and the extended sealing portion connects the second section and forms the first convex portion; The battery module includes more than two battery cells, and the battery cells are arranged along the second direction. The circuit board includes a second accommodating groove, and the second accommodating groove has a second opening facing the first protrusion. Along the second direction, the first protrusions adjacent to different battery cells extend from the second opening into the second accommodating groove.

11. The battery module according to claim 2 or 6, characterized in that: It also includes a frame, wherein the battery cell shell is located in the frame when viewed along the thickness direction of the battery cell; The frame includes a reinforcement section, which is located between the battery cell housing and the circuit board along the first direction, and includes a first section and a second section which are spaced apart along the second direction; The first section includes a first subsection and a second subsection. Along the first direction, the first subsection is located at a side of the first protrusion away from the top wall, and the second subsection is located between the first section and the circuit board. The second section includes a third subsection and a fourth subsection. Along the first direction, the third subsection is located between another first protrusion of the same battery cell and the circuit board, and the fourth subsection is located between the first section and the circuit board. Observed along the thickness direction of the battery core, along the second direction, the main body is located between the first section and the second section.

12. The battery module according to claim 1, characterized in that: The battery module includes a plurality of battery cells arranged along a second direction, a portion of the circuit board is disposed in a first space of each of the battery cells, and the first direction is perpendicular to the second direction.

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

14. An electrical device, characterized in that: Comprising a battery module as described in any one of claims 1 to 13.

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