Battery module and electric equipment

Abstract

The utility model relates to the technical field of energy storage, in particular to a battery module and electric equipment. The battery module comprises a battery cell and a first circuit board. The battery cell comprises a shell, an electrode assembly and a tab, the shell comprises a main body part and a packaging part, the electrode assembly is accommodated in the main body part, the main body part comprises a top wall, the packaging part comprises a top sealing part connected with the top wall, an accommodating space is formed between the top wall and the top sealing part, the tab comprises a connecting part and an extending part which are connected, the connecting part is connected with the electrode assembly, and the extending part extends out of the top sealing part. The first circuit board is contained in the containing space and comprises a substrate, the substrate is connected with the extending part, the thickness direction of the main body part is a first direction, the thickness direction of the substrate intersects with the first direction, and the substrate is located in the main body part when observed in the first direction, so that the thickness direction of the substrate can basically face the main body part; therefore, the space occupation of the substrate in the length direction of the battery module is reduced, and the energy density of the battery module is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of energy storage, in particular to a battery module and a power consumption device. BACKGROUND

[0002] At present, in electronic products such as mobile phones, notebook computers and tablet computers, charging speed and temperature rise are two main aspects affecting the use experience of consumers on electronic products. With the continuous improvement of mobile phone performance in recent years and the wide application of AI, the host energy consumption is getting higher and higher, and the requirements of mobile phone manufacturers on battery capacity are also increasing, but the accommodation space of the battery is continuously reduced under the compression of key devices such as cameras and mainboards, so the demand for the improvement of the energy density of the battery module is extremely strong. CONTENT OF THE UTILITY MODEL

[0003] Therefore, the present application provides a battery module and a power consumption device, which can improve the energy density of the battery module.

[0004] In a first aspect, an embodiment of the present application provides a battery module, comprising a battery cell and a first circuit board. The battery cell comprises a shell, an electrode assembly and a tab. The shell comprises a main body part and a packaging part, the electrode assembly is accommodated in the main body part, the main body part comprises a top wall, the packaging part comprises a top sealing part connected with the top wall, a containing space is formed between the top wall and the top sealing part, the tab comprises a connecting part and a protruding part connected with each other, the connecting part is connected with the electrode assembly, and the protruding part protrudes from the top sealing part. The first circuit board is accommodated in the containing space, the first circuit board comprises a substrate, the substrate is connected with the protruding part, the thickness direction of the main body part is a first direction, the thickness direction of the substrate intersects the first direction, and the substrate is located in the main body part when viewed along the first direction.

[0005] The first circuit board is accommodated in the containing space formed between the top wall and the top sealing part, and usually the size of the thickness direction of the substrate is smaller than the size of the width direction of the substrate, so that the thickness direction of the substrate of the first circuit board intersects the thickness direction of the main body part, thereby reducing the space occupation of the substrate in the extension direction of the top sealing part, and facilitating the improvement of the energy density of the battery module.

[0006] In the above embodiment, the first circuit board further comprises an electronic element, the substrate has a mounting surface, the electronic element is arranged on the mounting surface, and the mounting surface is arranged opposite to the top wall along a second direction perpendicular to the first direction.

[0007] The mounting surface of the substrate is arranged opposite to the top wall along the second direction, so that the thickness direction of the substrate is parallel to the length direction of the main body part, thereby reducing the space occupation of the substrate in the length direction of the battery module and improving the energy density of the battery module.

[0008] In one or more of the embodiments above, the protruding portion includes a first extension segment and a second extension segment, the first extension segment includes a first sub-segment, a second sub-segment, and a bending segment, the first sub-segment is connected to the connecting portion, the second sub-segment is connected to the second extension segment, the bending segment connects the first sub-segment and the second sub-segment, the first sub-segment and the second sub-segment are oppositely arranged along a first direction, the second extension segment is connected to the first circuit board and oppositely arranged with the first circuit board along a second direction, the second direction is perpendicular to the first direction.

[0009] The bending segment connects the first sub-segment and the second sub-segment, the first sub-segment and the second sub-segment are oppositely arranged along a first direction, the second extension segment is connected to the first circuit board and oppositely arranged with the first circuit board along a second direction, thereby shaping the protruding portion, and further reducing the influence of the protruding portion rebounding due to stress on the installation of the first circuit board, and facilitating the control of the position of the first circuit board in the accommodation space.

[0010] In one or more of the embodiments above, an inner recess is provided between the second sub-segment and the second extension segment, and the inner recess extends towards the top wall along the second direction.

[0011] The inner recess shapes the protruding portion of the tab, reducing the influence of the protruding portion rebounding due to stress on the installation of the first circuit board.

[0012] In one or more of the embodiments above, along the second direction, the distance between the bending segment and the top wall is D1, the distance between the second extension segment and the top wall is D2, and 0.1mm≤D1-D2≤2.5mm.

[0013] By controlling the difference between the distance D1 between the bending segment and the top wall and the distance D2 between the second extension segment and the top wall to be between 0.1mm and 2.5mm, it is convenient to place the first circuit board. When the difference between the distance D1 between the bending segment and the top wall and the distance D2 between the second extension segment and the top wall is greater than 2.5mm, there is not enough accommodation space, the space for placing the first circuit board is not enough, and the first circuit board is prone to be pressed against the main body portion. When the difference between the distance D1 between the bending segment and the top wall and the distance D2 between the second extension segment and the top wall is less than 0.1mm, due to the thickness and assembly tolerance of the tab itself, there is a risk that the tab exceeds the product size range.

[0014] In one or more of the embodiments above, the battery module further includes an adapter, the adapter includes a first segment, a second segment, and a third segment connected in sequence, the third segment is connected to the first circuit board, the second extension segment is partially located between the first segment and the third segment and connected to the first segment, and the first segment, the second extension segment, the third segment, and the first circuit board are stacked along the second direction.

[0015] The first circuit board is connected through the third section of the adapter, and the second extension section is located between the first section and the third section and connected with the first section, so that the protruding part of the tab has a more flexible connection position with the adapter, and the connection convenience of the tab and the first circuit board is improved.

[0016] In one or more of the embodiments above, the first circuit board further comprises a protective glue, and the protective glue is arranged on the mounting surface and covers the electronic component.

[0017] By arranging the protective glue on the mounting surface and covering the electronic component with the protective glue, the safety of the electronic component during assembly of the first circuit board is improved.

[0018] In one or more of the embodiments above, the first circuit board further comprises a protective support, and the protective support has a protective cavity, and the electronic component is located in the protective cavity.

[0019] By placing the electronic component in the protective cavity of the protective support and protecting the electronic component with the protective support, the safety of the electronic component during assembly of the first circuit board is improved.

[0020] In one or more of the embodiments above, the battery module further comprises a covering member and a second circuit board, the second circuit board comprises an embedded part, a lead-out part and an external connection part connected with each other, the embedded part is connected with the first circuit board and arranged opposite to the first circuit board along a second direction, the lead-out part is protruded by the covering member, the external connection part is configured to be connected with an external circuit, the covering member covers the top sealing part, the protruding part, the first circuit board, the embedded part and part of the lead-out part, and the second direction is perpendicular to the first direction.

[0021] The covering member covers the top sealing part, the protruding part, the first circuit board and the embedded part, which is conducive to fixing the relative positions of the top sealing part, the protruding part, the first circuit board and the embedded part, and plays a role in protecting the electronic component and conducting heat for the electronic component, thereby reducing the temperature rise of the head of the battery module. The covering member also covers part of the lead-out part, which is conducive to improving the connection convenience of the battery module and the external circuit.

[0022] In one or more of the embodiments above, the lead-out part comprises a first lead-out subpart and a second lead-out subpart connected with each other, the first lead-out subpart is connected with the embedded part and located in the covering member, the second lead-out subpart is connected with the external connection part and located outside the covering member, the first lead-out subpart forms an included angle ∠a with the second direction, and 20°≤∠a≤60°.

[0023] By tilting the first lead-out sub-portion, the length of the lead-out portion embedded in the overmold is reduced, and the length of the second lead-out sub-portion is increased, thereby improving the flexibility of the second circuit board. Controlling the included angle between the first lead-out sub-portion and the second direction to be between 20° and 60° is conducive to improving the flexibility of the second circuit board extending out of the overmold. Forming the overmold at the head of the battery module requires placing the battery module in a mold for low-pressure injection molding. When the included angle between the first lead-out sub-portion and the second direction is less than 20°, the risk of the mold being difficult to hold the second circuit board is increased. When the included angle between the first lead-out sub-portion and the second direction is greater than 60°, the first lead-out sub-portion is embedded in the overmold too much, and the portion of the lead-out portion extending out of the overmold is too short, resulting in an increased risk of the second circuit board being inconvenient to connect to external circuits and waste of second circuit board material.

[0024] In one or more of the above embodiments, the main body portion includes a side wall, the encapsulation portion further includes a side encapsulation portion and an edge connection portion, the side encapsulation portion is connected with the side wall and oppositely arranged along a third direction, and the edge connection portion is connected with the side encapsulation portion and the top encapsulation portion, the first direction, the second direction, and the third direction are perpendicular to each other;

[0025] The overmold includes a first overmold portion and a second overmold portion arranged along a third direction, the first overmold portion encapsulates the extending portion and the first circuit board, the second overmold portion encapsulates the edge connection portion, the inlay portion is located in the first overmold portion, and the lead-out portion extends from the first overmold portion to the second overmold portion and extends out of the overmold from the second overmold portion;

[0026] Along the second direction, the distance between the end surface of the first overmold portion away from the top wall and the top wall is L1, the distance between the end surface of the second overmold portion away from the top wall and the top wall is L2, and 0.1mm≤L1-L2≤0.8mm.

[0027] When the difference between the distance L2 between the end surface of the second overmold portion away from the top wall and the top wall and the distance L1 between the end surface of the first overmold portion away from the top wall and the top wall is less than 0.1mm, the first lead-out sub-portion is embedded in the overmold too much, and the portion of the lead-out portion extending out of the overmold is too short, resulting in insufficient flexibility of the second circuit board. When the difference between the distance L2 between the end surface of the second overmold portion away from the top wall and the top wall and the distance L1 between the end surface of the first overmold portion away from the top wall and the top wall is greater than 0.8mm, it is not conducive to reducing the risk of the top encapsulation side edge and the edge connection portion being exposed from the second overmold portion.

[0028] In one or more of the above embodiments, the cell further includes a tab seal, the tab seal is located between the tab and the top encapsulation portion, and the extending portion extends out of the tab seal;

[0029] The first covering portion has a first end face close to the second covering portion along the third direction, the first end face extends along the second direction, the first end face is opposite to the top sealing end face along the third direction, and a distance between the first end face and the tab sealing piece along the third direction is L3, 0.1mm≤L3≤0.6mm.

[0030] By controlling the distance between the first end face and the tab sealing piece to be between 0.1mm and 0.6mm, the influence of the first end face on the tab sealing piece is reduced, and the tab sealing piece has sufficient connection strength.

[0031] In one or more of the embodiments above, the battery cell further includes a tab sealing piece, the tab sealing piece is located between the tab and the top sealing portion, and the extending portion is extended by the tab sealing piece;

[0032] The first circuit board has a first side face facing the top sealing portion along the first direction, the first side face is provided with a first avoiding slot, and the tab sealing piece is partially located in the first avoiding slot.

[0033] The first side face of the first circuit board is provided with the first avoiding slot, the tab sealing piece is partially located in the first avoiding slot, and the space occupied by the tab sealing piece and the first circuit board along the first direction is reduced, which is beneficial to improve the energy density of the battery assembly.

[0034] In one or more of the embodiments above, the first circuit board has a second side face away from the top sealing portion along the first direction, and the second side face is at least partially exposed to the covering piece.

[0035] The second side face is at least partially exposed to the covering piece, which is beneficial to reduce the space occupied by the covering piece along the first direction, and is beneficial to improve the energy density of the battery module. At the same time, the area of the first circuit board along the first direction can be increased as much as possible, and the current carrying capacity of the first circuit board is improved.

[0036] In one or more of the embodiments above, the top sealing portion includes a first sub-side face facing the first circuit board and a second sub-side face away from the first circuit board along the first direction, and the second sub-side face includes an exposed area exposed to the covering piece.

[0037] The exposed area of the second sub-side face is exposed to the covering piece, which is beneficial to reduce the space occupied by the covering piece along the first direction, and is beneficial to improve the energy density of the battery module.

[0038] In one or more of the embodiments above, the second sub-side face further includes a covering area located in the covering piece, and the exposed area overlaps with the tab sealing piece along the first direction.

[0039] In the first direction, the tab seal additionally occupies a certain space. By exposing the area of the top seal part with the tab seal to the overmold, the overmold can be improved to additionally occupy the space in the first direction, and the energy density of the battery module can be improved.

[0040] In one or more of the above embodiments, the battery module further includes an insulating piece, the insulating piece covering the exposed area.

[0041] The insulating piece partially covers the exposed area, which is conducive to protecting the exposed area by the insulating piece.

[0042] In one or more of the above embodiments, the battery module includes two battery cells, the two battery cells being arranged side by side in the third direction;

[0043] The body part of each battery cell includes a first side wall, and the packaging part of each battery cell includes a first side seal part, the first side seal part of the same battery cell being connected to the first side wall and arranged opposite the first side wall in the third direction, and the first side seal parts of the two battery cells being arranged opposite each other in the third direction.

[0044] The packaging part of each battery cell further includes a first edge connecting part, the first edge connecting part connecting the first side seal part and the top seal part, the first edge connecting parts of the two battery cells being arranged adjacent to each other, the first edge connecting part including a first subpart and a second subpart, the first subpart being arranged opposite the top seal part in the first direction, and the second subpart being arranged opposite the top wall in the second direction, the first direction, the second direction, and the third direction being perpendicular to each other in pairs.

[0045] The first circuit board includes a first region, a second region, and a third region distributed in the third direction, the first region being located in the accommodation space of one battery cell and arranged opposite the top wall of the battery cell in the second direction, the third region being located in the accommodation space of the other battery cell and arranged opposite the top wall of the battery cell in the second direction, the second region being arranged opposite the first subparts of the two battery cells in the first direction, and the second region being further arranged opposite the second subparts of the two battery cells in the second direction.

[0046] The first circuit board can simultaneously connect the two battery cells. By arranging the first subpart opposite the top seal part in the first direction, arranging the second subpart opposite the top wall in the second direction, and arranging the second region of the first circuit board opposite the first subparts of the two battery cells in the first direction and opposite the second subparts of the two battery cells in the second direction, the risk of interference between the first edge connecting part and the second region can be reduced, the width of the second region in the first direction can be increased, and the on-board capacity of the first circuit board can be improved.

[0047] In one or more of the above embodiments, the body part of each battery cell further includes a second side wall distributed in the third direction, and the packaging part of each battery cell includes a second side seal part, the second side seal part of the same battery cell being connected to the second side wall and arranged opposite the second side wall in the third direction.

[0048] The packaging part of each battery cell further comprises a second edge connecting part connecting the second side packaging part and one end of the top packaging part away from the first edge connecting part in the third direction, the second edge connecting part comprises a third sub-part and a fourth sub-part, the third sub-part is arranged opposite to the top packaging part in the first direction, and the fourth sub-part is arranged opposite to the top wall in the second direction, the first direction, the second direction and the third direction are perpendicular to each other;

[0049] The battery module further comprises a cladding part cladding the top packaging part, the protruding part, the third sub-part and the fourth sub-part.

[0050] The cladding part clads the top packaging part, the protruding part, the third sub-part and the fourth sub-part, thereby playing a role of protecting the second edge connecting part.

[0051] In one or more of the above embodiments, in the first direction, the first circuit board has a first side surface facing the top packaging part, the first side surface is provided with a second air-avoiding groove, and the first sub-part is located in the second air-avoiding groove.

[0052] The first sub-part is located in the second air-avoiding groove, thereby improving the problem of additional space occupied by the first sub-part, and being conducive to improving the energy density of the battery module.

[0053] In a second aspect, the embodiments of the present application provide a power consumption device comprising the battery module in one or more of the above embodiments. BRIEF DESCRIPTION OF DRAWINGS

[0054] Figure 1 is the overall structure schematic diagram of the battery module in an embodiment of the present application, which shows the structure of a single battery cell.

[0055] Figure 2 is the position relationship schematic diagram of the main body part and the first circuit board and the second circuit board in an embodiment of the present application.

[0056] Figure 3 is the sectional view of the battery module in an embodiment of the present application.

[0057] Figure 4 is the sectional view of the battery module in another embodiment of the present application.

[0058] Figure 5 is the sectional view of the battery module in another embodiment of the present application.

[0059] Figure 6 is the sectional view of the battery module in another embodiment of the present application.

[0060] Figure 7 is the sectional view of the battery module in another embodiment of the present application.

[0061] Figure 8 is a sectional view of a battery module in another embodiment of the present application.

[0062] Figure 9 is a sectional view of a battery module in another embodiment of the present application.

[0063] Figure 10 is a sectional view of a battery module in another embodiment of the present application.

[0064] Figure 11 is a sectional view of a battery module in another embodiment of the present application.

[0065] Figure 12 is a sectional view of a battery module in another embodiment of the present application.

[0066] Figure 13 is a schematic diagram of the lead-out mode of the second circuit board in one embodiment of the present application.

[0067] Figure 14 is a schematic diagram of the lead-out mode of the second circuit board in another embodiment of the present application.

[0068] Figure 15 is a schematic diagram of the positional relationship between the first circuit board and the top sealing part in one embodiment of the present application.

[0069] Figure 16 is a schematic diagram of the positional relationship between the first circuit board and the top sealing part in another embodiment of the present application.

[0070] Figure 17 is a schematic diagram of the overall structure of a battery module in one embodiment of the present application, which shows a structure of two electric cores.

[0071] Figure 18 is a schematic diagram of the assembly relationship between two electric cores and the first circuit board in one embodiment of the present application.

[0072] Figure 19 is a schematic diagram of the positional relationship between the shielding member and the battery module in one embodiment of the present application.

[0073] Figure 20 is a schematic diagram of the structure of an electric device in one embodiment of the present application.

[0074] Main element symbol explanation

[0075] 001、battery module; 1123b1、third sub-part; 231、first avoidance slot;

[0076] 100、electric core; 1123b2、fourth sub-part; 232、second avoidance slot;

[0077] 110, housing; 113, accommodating space; 240, second side surface;

[0078] 111, main body part; 130, tab; 250, first region;

[0079] 1111, top wall; 131, connecting part; 260, second region;

[0080] 1112, side wall; 132, protruding part; 270, third region;

[0081] 1112a, first side wall; 1321, first extension section; 300, adapter;

[0082] 1112b, second side wall; 1321a, first sub-section; 310, first section;

[0083] 112, encapsulating part; 1321b, bent section; 320, second section;

[0084] 1121, top encapsulating part; 1321c, second sub-section; 330, third section;

[0085] 1121a, first sub-side surface; 1321d, recessed part; 400, covering member;

[0086] 1121b, second sub-side surface; 1322, second extension section; 410, first covering part;

[0087] 1121c, top encapsulating main body; 1323, third extension section; 411, first end surface;

[0088] 1121c1, top encapsulating end surface; 1324, fourth extension section; 420, second covering part;

[0089] 1121d, top encapsulating side edge; 140, tab sealing member; 500, second circuit board;

[0090] S1, exposed region; 200, first circuit board; 510, inlaid part;

[0091] S2, covering region; 210, substrate; 520, lead-out part;

[0092] 1122, side encapsulating part; 211, mounting surface; 521, first lead-out sub-part;

[0093] 1122a, first side encapsulating part; 212, connecting surface; 522, second lead-out sub-part;

[0094] 1122b, second side encapsulating part; 213, adapter surface; 530, external connection part;

[0095] 1123, edge connecting part; 220, electronic component; 600, insulating piece;

[0096] 1123a, first edge connecting part; 221, protective glue; 610, shielding piece;

[0097] 1123a1, first sub-part; 222, protective bracket; 002, electrical equipment;

[0098] 1123a2, second sub-part; 2221, protective cavity; Z, first direction;

[0099] 1123b, second edge connecting part; 230, first side; X, second direction;

[0100] Y, third direction. DETAILED DESCRIPTION

[0101] The technical solutions in the embodiments of the present application will be described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only some of the embodiments of the present application, but not all of the embodiments of the present application.

[0102] It should be noted that, unless otherwise explicitly specified and limited, the terms "mounting", "connecting", "connecting", "fixing" and the like should be understood in a broad sense, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrally connected; it can be mechanically connected, or it can be electrically connected. When a component is considered to be "connected" to another component, it can be directly connected to another component or there can be a middle component. When a component is considered to be "provided" on another component, it can be directly provided on another component or there can be a middle component.

[0103] Unless otherwise specified, the term "a plurality of" as used herein refers to two or more.

[0104] The terms "first", "second", and the like are only used to distinguish different objects, and cannot be understood as indicating or implying relative importance or implying the number, specific order or primary and secondary relationship of the indicated technical features.

[0105] The term "vertical" is used to describe the ideal state between two components. In the actual production or use state, there can be an approximate vertical state between the two components. For example, in combination with numerical description, vertical can refer to the included angle between two straight lines in the range of 90°±10°, vertical can also refer to the dihedral angle between two planes in the range of 90°±10°, and vertical can also refer to the included angle between a straight line and a plane in the range of 90°±10°.

[0106] The term "parallel" is used to describe an ideal state between two components. In a state of actual production or use, there can be a state that approximates parallel between the two components. For example, in connection with numerical descriptions, parallel can refer to an included angle between two straight lines in a range of 180°±10°, parallel can also refer to a dihedral angle between two planes in a range of 180°±10°, and parallel can also refer to an included angle between a straight line and a plane in a range of 180°±10°.

[0107] It should be noted that when a certain parameter is greater than, equal to, or less than a certain endpoint value, it is understood that there is a tolerance of ±5% for the endpoint value.

[0108] It should be noted that the dimensions of the structures shown in the drawings are given for better understanding and more convenient description, and the application is not limited to the dimensions shown in the drawings. In order to make the application clear, the elements irrelevant to the description are omitted from the details of the specification.

[0109] 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 in the specification of the present application is only for the purpose of describing specific embodiments and is not intended to limit the present application.

[0110] Some embodiments of the present application will be described in detail below with reference to the accompanying drawings. The features of the following embodiments and examples can be combined with each other as long as they do not conflict.

[0111] Please refer to Figures 1 to 3 The embodiments of the present application provide a battery module 001, which comprises a battery cell 100 and a first circuit board 200, and the first circuit board 200 is arranged at the head of the battery cell 100. Specifically, the battery cell 100 comprises a shell 110, an electrode assembly (not shown in the figure) and a tab 130, the shell 110 comprises a main body part 111 and an encapsulation part 112, and the electrode assembly is accommodated in the main body part 111.

[0112] The main body part 111 comprises a top wall 1111, the encapsulation part 112 comprises a top sealing part 1121 connected with the top wall 1111, and the tab 130 comprises a connecting part 131 and a protruding part 132 connected with each other, the connecting part 131 is connected with the electrode assembly, and the protruding part 132 protrudes from the top sealing part 1121.

[0113] A containing space 113 is formed between the top wall 1111 and the top sealing part 1121, and the first circuit board 200 is accommodated in the containing space 113.

[0114] In some embodiments, the first circuit board 200 comprises a substrate 210 connected with the protruding portion 132. The thickness direction of the main body portion 111 is defined as the first direction Z, and the thickness direction of the substrate 210 intersects the first direction Z, and the substrate 210 is located in the main body portion 111 when viewed along the first direction Z. Since the first circuit board 200 is accommodated in the accommodation space 113 formed between the top wall 1111 and the top sealing portion 1121, the size of the thickness direction of the substrate 210 is usually smaller than the size of the width direction thereof, so that the thickness direction of the substrate 210 of the first circuit board 200 intersects the thickness direction of the main body portion 111, thereby reducing the space occupation of the substrate 210 in the extension direction of the top sealing portion 1121, and facilitating to improve the energy density of the battery module 001.

[0115] In some embodiments, the first circuit board 200 further comprises an electronic element 220, and the substrate 210 has a mounting surface 211, and the electronic element 220 is arranged on the mounting surface 211. The mounting surface 211 is arranged opposite to the top wall 1111 along the second direction X, so that the thickness direction of the substrate 210 is parallel to the length direction of the main body portion 111, thereby reducing the space occupation of the substrate 210 in the length direction of the battery module 001, and improving the energy density of the battery module 001.

[0116] In some embodiments, the second direction X is perpendicular to the first direction Z, and the second direction X is the length direction of the main body portion 111.

[0117] In some embodiments, the battery cell 100 further comprises a tab sealing member 140 located between the tab 130 and the top sealing portion 1121, and the protruding portion 132 is protruded by the tab sealing member 140, and the gap between the tab 130 and the top sealing portion 1121 is sealed by the tab sealing member 140, thereby improving the sealing performance of the shell 110.

[0118] In some embodiments, the protruding portion 132 comprises a first extension segment 1321 and a second extension segment 1322, the first extension segment 1321 is connected with the connecting portion 131, and the second extension segment 1322 is connected with the first circuit board 200 and arranged opposite to the first circuit board 200 along the second direction X. In some embodiments, an inner recess portion 1321d is arranged between the first extension segment 1321 and the second extension segment 1322, and the inner recess portion 1321d extends towards the top wall 1111 along the second direction X, and the protruding portion 132 of the tab 130 is shaped by the inner recess portion 1321d, thereby reducing the influence of the rebound of the protruding portion 132 due to stress on the installation of the first circuit board 200.

[0119] In some embodiments, the first extension section 1321 comprises a first sub-section 1321a, a second sub-section 1321c and a bending section 1321b connected in sequence. The first sub-section 1321a is connected to the connecting portion 131, the second sub-section 1321c is connected to the second extension section 1322, and the bending section 1321b is connected to the first sub-section 1321a and the second sub-section 1321c. The first sub-section 1321a and the second sub-section 1321c are oppositely arranged along the first direction Z. The inner recess 1321d is arranged between the second sub-section 1321c and the second extension section 1322.

[0120] In the first aspect, the bending section 1321b connects the first sub-section 1321a and the second sub-section 1321c, the first sub-section 1321a and the second sub-section 1321c are oppositely arranged along the first direction Z, the second extension section 1322 is connected to the first circuit board 200 and oppositely arranged with the first circuit board 200 along the second direction X, and the inner recess 1321d connects the second sub-section 1321c and the first extension section 2321, thereby shaping the protruding portion 132 and reducing the influence of the protruding portion 132 rebounding due to stress on the installation of the first circuit board 200, which is conducive to controlling the position of the first circuit board 200 in the accommodation space 113. In the second aspect, by arranging the first sub-section 1321a, the second sub-section 1321c and the bending section 1321b, the first extension section 1321 can serve as a buffer zone for accommodating the protruding portion 132 that is too long due to tolerance settings, so as to facilitate the connection of the second extension section 1322 and the first circuit board 200.

[0121] In some embodiments, along the second direction X, the distance between the bending section 1321b and the top wall 1111 is D1, the distance between the second extension section 1322 and the top wall 1111 is D2, and 0.1mm≤D1-D2≤2.5mm. By controlling the difference between the distance D1 between the bending section 1321b and the top wall 1111 and the distance D2 between the second extension section 1322 and the top wall 1111 to be between 0.1mm and 2.5mm, it is convenient to place the first circuit board 200. When the difference between the distance D1 between the bending section 1321b and the top wall 1111 and the distance D2 between the second extension section 1322 and the top wall 1111 is greater than 2.5mm, there is not enough accommodation space 113, and there is not enough space to place the first circuit board 200, and the first circuit board 200 is prone to be damaged. When the difference between the distance D1 between the bending section 1321b and the top wall 1111 and the distance D2 between the second extension section 1322 and the top wall 1111 is less than 0.1mm, due to the thickness and assembly tolerance of the tab 130 itself, there is a risk that the tab 130 exceeds the product size range.

[0122] In some embodiments, the battery module 001 further comprises a adapter 300, the adapter 300 comprises a first segment 310, a second segment 320 and a third segment 330 connected in sequence, the third segment 330 is connected to the first circuit board 200, the second extension segment 1322 is partially located between the first segment 310 and the third segment 330 and connected to the first segment 310, the first segment 310, the second extension segment 1322, the third segment 330 and the first circuit board 200 are stacked along the second direction X. By connecting the first circuit board 200 through the third segment 330 of the adapter 300, and the second extension segment 1322 is partially located between the first segment 310 and the third segment 330 and connected to the first segment 310, so that the protruding part 132 of the tab 130 has a more flexible connection position with the adapter 300, and the connection convenience of the tab 130 and the first circuit board 200 is improved.

[0123] In some embodiments, the adapter 300 is a nickel sheet.

[0124] In some embodiments, the adapter 300 is a block, the adapter 300 is arranged between the first circuit board 200 and the second extension segment 1322, and electrically connected to the first circuit board 200 and the second extension segment 1322.

[0125] Please refer to Figure 4 In some embodiments, the adapter 300 is a nickel brick, and the adapter 300 is a single-layer structure.

[0126] Please refer to Figure 5 In some embodiments, the second extension segment 1322 is directly connected to the first circuit board 200.

[0127] Please refer to Figure 6 In some embodiments, the battery module 001 further comprises a adapter 300, the adapter 300 comprises a first segment 310, a second segment 320 and a third segment 330 connected in sequence, the third segment 330 is connected to the first circuit board 200. Wherein, the second segment 320 is located on the side of the first segment 310 and the third segment 330 close to the top sealing part 1121.

[0128] The extension part 132 comprises a first extension section 1321, a second extension section 1322, and a third extension section 1323. The third extension section 1323 is connected to one end of the second extension section 1322 away from the first extension section 1321. The second extension section 1322 and the third extension section 1323 are oppositely arranged along the second direction X. The third extension section 1323 extends into the first section 310 and the third section 330 from the side of the first section 310 away from the second section 320, and is connected to the surface of the first section 310 facing the third section 330. The second extension section 1322, the first section 310, the third extension section 1323, the third section 330, and the first circuit board 200 are sequentially stacked along the second direction X. Compared with the connection of the second extension section 1322 and the first section 310, the third extension section 1323 is additionally arranged at one end of the second extension section 1322 away from the first extension section 1321, so as to increase the overall length of the extension part 132, and further increase the solderable area of the extension part 132, and reduce the risk of increasing the process due to the need to increase the solderable area by cutting the tab seal 140.

[0129] Please refer to Figure 7 In some embodiments, the substrate 210 further has an adapter surface 213 oppositely arranged with the top wall 1111 along the second direction X.

[0130] The battery module 001 further comprises an adapter 300 arranged on the adapter surface 213. The adapter 300 comprises a first section 310, a second section 320, and a third section 330 connected in sequence. The second section 320 is located on the side of the first section 310 and the third section 330 away from the top seal part 1121. The third section 330 is oppositely arranged with the first section 310 along the second direction X. The third section 330 is connected to the adapter surface 213, and the first section 310 is connected to the extension part 132.

[0131] The extension part 132 comprises a first extension section 1321, a second extension section 1322, and a third extension section 1323. The third extension section 1323 is connected to one end of the second extension section 1322 away from the first extension section 1321. The second extension section 1322 and the third extension section 1323 are oppositely arranged along the second direction X. The third extension section 1323 extends into the first section 310 and the third section 330 from the side of the first section 310 away from the second section 320, and is connected to the surface of the first section 310 facing the third section 330. The second extension section 1322, the first section 310, the third extension section 1323, the third section 330, and the first circuit board 200 are sequentially stacked along the second direction X. Compared with the connection of the second extension section 1322 and the first section 310, the third extension section 1323 is additionally arranged at one end of the second extension section 1322 away from the first extension section 1321, so as to increase the overall length of the extension part 132, and further increase the solderable area of the extension part 132, and reduce the risk of increasing the process due to the need to increase the solderable area by cutting the tab seal 140.

[0132] The third extension section 1323 extends into the first section 310 and the third section 330 from the side of the first section 310 away from the second section 320, and is connected to the surface of the first section 310 facing the third section 330.

[0133] In some embodiments, the adapter surface 213 and the mounting surface 211 are located in the same plane.

[0134] In other embodiments, the adapter surface 213 and the mounting surface 211 are located in different planes.

[0135] Referring to Figure 8 In some embodiments, the substrate 210 further has an adapter surface 213 opposite the top wall 1111 along the second direction X.

[0136] The battery module 001 further includes an adapter 300 disposed on the adapter surface 213. The adapter 300 includes a first segment 310, a second segment 320, and a third segment 330 connected in sequence. The second segment 320 is located on the side of the first segment 310 and the third segment 330 close to the top seal portion 1121. The third segment 330 is opposite the first segment 310 along the second direction X, the third segment 330 is connected to the adapter surface 213, and the first segment 310 is connected to the protruding portion 132.

[0137] The protruding portion 132 includes a first extension segment 1321, a second extension segment 1322, a third extension segment 1323, and a fourth extension segment 1324. The second extension segment 1322 is connected to the first extension segment 1321 and the fourth extension segment 1324, and the fourth extension segment 1324 is connected to the second extension segment 1322 and the third extension segment 1323. The third extension segment 1323, the first circuit board 200, and the second extension segment 1322 are sequentially stacked along the second direction X, and the fourth extension segment 1324, the first circuit board 200, and the top seal portion 1121 are sequentially stacked along the first direction Z.

[0138] The third extension segment 1323 is connected to an end of the fourth extension segment 1324 away from the second extension segment 1322. The third extension segment 1323 extends into the first segment 310 and the third segment 330 from the side of the first segment 310 away from the second segment 320, and is connected to the surface of the first segment 310 facing the third segment 330.

[0139] Referring to Figure 9 In some embodiments, the first circuit board 200 includes a substrate 210 and an electronic component 220. The substrate 210 has a mounting surface 211 disposed toward the top wall 1111, and the electronic component 220 is disposed on the mounting surface 211.

[0140] The protruding portion 132 includes a first extension segment 1321, a second extension segment 1322, and a third extension segment 1323. The third extension segment 1323 is connected to an end of the second extension segment 1322 away from the first extension segment 1321. The substrate 210 has a connecting surface 212 facing the top seal portion 1121, and the third extension segment 1323 is connected to the connecting surface 212. The substrate 210, the third extension segment 1323, and the top seal portion 1121 are arranged along the first direction Z, thereby reducing the occupied space of the connection structure of the first circuit board 200 and the protruding portion 132 in the second direction X, and improving the energy density of the secondary battery 001.

[0141] In some embodiments, the battery module 001 further comprises an adapter (not shown in the figure), which is arranged between the connecting surface 212 and the third extension segment 1323 and connects the third extension segment 1323 and the connecting surface 212. The substrate 210, the adapter, the third extension segment 1323, and the top sealing portion 1121 are arranged along the first direction Z, which is conducive to reducing the space occupation of the adapter in the second direction X and improving the energy density of the secondary battery 001.

[0142] Referring to Figure 10 In some embodiments, the first circuit board 200 comprises a substrate 210 and electronic components 220, the substrate 210 has a mounting surface 211 arranged towards the top wall 1111, and the electronic components 220 are arranged on the mounting surface 211.

[0143] The extension portion 132 comprises a first extension segment 1321, a second extension segment 1322, a fourth extension segment 1324, and a third extension segment 1323 connected in sequence, the second extension segment 1322 connects the first extension segment 1321 and the fourth extension segment 1324, and the fourth extension segment 1324 connects the second extension segment 1322 and the third extension segment 1323. The third extension segment 1323, the substrate 210, and the top sealing portion 1121 are sequentially stacked along the first direction Z, and the top wall 1111, the first circuit board 200, and the fourth extension segment 1324 are sequentially stacked along the second direction X.

[0144] The substrate 210 has a connecting surface 212 on the side away from the top sealing portion 1121, and the third extension segment 1323 is connected to the connecting surface 212, thereby reducing the space occupation of the first circuit board 200 and the connecting structure of the extension portion 132 in the second direction X and improving the energy density of the secondary battery 001.

[0145] In some embodiments, the battery module 001 further comprises an adapter (not shown in the figure), which is arranged between the connecting surface 212 and the third extension segment 1323 and connects the third extension segment 1323 and the connecting surface 212. The third extension segment 1323, the adapter, the substrate 210, and the top sealing portion 1121 are arranged along the first direction Z, which is conducive to reducing the space occupation of the adapter in the second direction X and improving the energy density of the secondary battery 001.

[0146] Referring to Figure 11 In some embodiments, the first circuit board 200 further comprises a protective glue 221 arranged on the mounting surface 211 and covering the electronic components 220. By arranging the protective glue 221 on the mounting surface 211 and covering the electronic components 220 with the protective glue 221, the safety of the electronic components 220 can be improved during the assembly of the first circuit board 200.

[0147] In some embodiments, the battery module 001 further comprises a cladding 400, the cladding 400 cladding the top seal portion 1121, the protruding portion 132, the substrate 210 and the protective glue 221.

[0148] Referring to Figure 12 In some embodiments, the first circuit board 200 further comprises a protective bracket 222, the protective bracket 222 has a protective cavity 2221, an opening of the protective cavity 2221 is arranged towards the top seal portion 1121, the first circuit board 200 can at least partially enter the protective cavity 2221 from the opening of the protective cavity 2221, and the electronic component 220 is located in the protective cavity 2221. By placing the electronic component 220 in the protective cavity 2221 of the protective bracket 222, the electronic component 220 is protected by the protective bracket 222, which is conducive to improving the safety of the electronic component 220 during assembly of the first circuit board 200.

[0149] In some embodiments, the protective bracket 222 is an integrally formed plastic part.

[0150] Referring to Figure 2 and Figure 13 In some embodiments, the battery module 001 further comprises a cladding 400, the cladding 400 cladding the top seal portion 1121, the protruding portion 132 and the first circuit board 200.

[0151] In some embodiments, part of the cladding 400 is located in the gap between the top seal portion 1121, the protruding portion 132 and the first circuit board 200.

[0152] In some embodiments, the cladding 400 is a resin material. The molten cladding 400 fills the gap between the top seal portion 1121, the protruding portion 132 and the first circuit board 200, and after cooling and solidification, the cladding 400 clads the top seal portion 1121, the protruding portion 132 and the first circuit board 200, and fixes the relative positions of the top seal portion 1121, the protruding portion 132 and the first circuit board 200, while also protecting the electronic component 220 and conducting heat to the electronic component 220, thereby reducing the temperature rise of the head of the battery module 001.

[0153] In some embodiments, the battery module 001 further comprises a second circuit board 500. The second circuit board 500 comprises an embedded portion 510, a lead-out portion 520 and an external portion 530 connected in series, the embedded portion 510 is connected to the first circuit board 200 and is arranged opposite to the first circuit board 200 along a second direction X.

[0154] The lead-out portion 520 is protruded by the cladding 400, and the external portion 530 is configured to be connected with an external circuit. The cladding 400 clads the top seal portion 1121, the protruding portion 132, the first circuit board 200, the embedded portion 510 and part of the lead-out portion 520, and the second direction X is perpendicular to the first direction Z.

[0155] In some embodiments, the first and second lead-out sub-sections 521 and 522 are connected to each other. Figure 2 and Figure 14 In some embodiments, the lead-out section 520 includes a first lead-out sub-section 521 and a second lead-out sub-section 522 connected to each other, the first lead-out sub-section 521 is connected to the embedded section 510 and located inside the covering member 400, the second lead-out sub-section 522 is connected to the external section 530 and located outside the covering member 400, the first lead-out sub-section 521 forms an angle ∠a with the second direction X, 20°≤∠a≤60°. By tilting the first lead-out sub-section 521, the length of the lead-out section 520 embedded in the covering member 400 is reduced, and the length of the second lead-out sub-section 522 is increased, thereby improving the flexibility of the second circuit board 500. Forming the covering member 400 at the head of the battery module 001 requires placing the battery module 001 in a mold for low-pressure injection molding. When the angle formed by the first lead-out sub-section 521 and the second direction X is less than 20°, the risk of the mold being difficult to hold the second circuit board 500 is increased. When the angle formed by the first lead-out sub-section 521 and the second direction X is greater than 60°, the first lead-out sub-section 521 is embedded in the covering member 400 too much, and the part of the lead-out section 520 protruding from the covering member 400 is too short, which increases the risk of the second circuit board 500 being inconvenient to connect with external circuits and waste of the material of the second circuit board 500.

[0156] In some embodiments, the second circuit board 500 is a flexible circuit board.

[0157] In some embodiments, the first circuit board 200 is a rigid circuit board.

[0158] In some embodiments, the main body section 111 includes a side wall 1112 distributed along a third direction Y, the third direction Y is the width direction of the main body section 111. Figure 2 Figure 13 In some embodiments, the main body section 111 includes a side wall 1112 distributed along a third direction Y, the third direction Y is the width direction of the main body section 111.

[0159] The packaging section 112 further includes a side sealing section 1122 and a sealing edge connecting section 1123, the side sealing section 1122 is connected to the side wall 1112 and oppositely arranged along the third direction Y, the sealing edge connecting section 1123 is connected to the side sealing section 1122 and the top sealing section 1121, the first direction Z, the second direction X and the third direction Y are perpendicular to each other.

[0160] ​In some embodiments, the top seal portion 1121 includes a top seal body 1121c and a top seal side edge 1121d arranged along the third direction Y, the connecting portion 1123 and the tab seal 140 are located in the top seal body 1121c. Along the third direction Y, the top seal body 1121c has a top seal end face 1121c1 close to the top seal side edge 1121d, and the top seal end face 1121c1 extends along the second direction X. In some embodiments, the overmold 400 includes a first overmold portion 410 and a second overmold portion 420 arranged along the third direction Y, the first overmold portion 410 overmolds the protruding portion 132 and the first circuit board 200, and the second overmold portion 420 overmolds the top seal side edge 1121d and the edge connecting portion 1123.

[0161] The first overmold portion 410 overmolds the top seal body 1121c, and the second overmold portion 420 overmolds the top seal side edge 1121d. Along the second direction X, the length of the top seal end face 1121c1 is greater than or equal to 0.1 mm and less than or equal to 0.6 mm.

[0162] The embedded portion 510 is located in the first overmold portion 410, and the lead-out portion 520 extends from the first overmold portion 410 to the second overmold portion 420 and protrudes out of the overmold 400 from the second overmold portion 420. Along the second direction X, the distance between the end face of the first overmold portion 410 away from the top wall 1111 and the top wall 1111 is L1, and the distance between the end face of the second overmold portion 420 away from the top wall 1111 and the top wall 1111 is L2, 0.1 mm≤L1-L2≤0.8 mm. When the difference between the distance L2 between the end face of the second overmold portion 420 away from the top wall 1111 and the top wall 1111 and the distance L1 between the end face of the first overmold portion 410 away from the top wall 1111 and the top wall 1111 is less than 0.1 mm, the first lead-out sub-portion 521 is embedded in the overmold 400 too much, the lead-out portion 520 protrudes out of the overmold 400 too short, and the activity of the second circuit board 500 is insufficient. When the difference between the distance L2 between the end face of the second overmold portion 420 away from the top wall 1111 and the top wall 1111 and the distance L1 between the end face of the first overmold portion 410 away from the top wall 1111 and the top wall 1111 is greater than 0.8 mm, it is not conducive to reducing the risk of the top seal side edge 1121d and the edge connecting portion 1123 exposed from the second overmold portion 420.

[0163] In some embodiments, along the third direction Y, the first overmold portion 410 has a first end face 411 close to the second overmold portion 420, the first end face 411 extends along the second direction X, and the first end face 411 is oppositely arranged with the top seal end face 1121c1 along the third direction Y. Along the third direction Y, the distance between the first end face 411 and the tab seal 140 is L3, 0.1 mm≤L3≤0.6 mm.

[0164] In some embodiments, along the second direction X, the height of the first end face 411 is H, and H=L1-L2.

[0165] In some embodiments, referring to Figure 2 and Figure 15 , along the first direction Z, the first circuit board 200 has a first side 230 facing the top seal portion 1121, the first side 230 is provided with a first avoiding slot 231, the tab seal 140 is partially located in the first avoiding slot 231, which reduces the space occupied by the tab seal 140 and the first circuit board 200 along the first direction Z, and is conducive to improving the energy density of the battery assembly.

[0166] In some embodiments, referring to and

[0167] , along the first direction Z, the first circuit board 200 has a second side 240 facing away from the top seal portion 1121, the second side 240 is at least partially exposed to the cladding 400, which is conducive to reducing the space occupied by the cladding 400 along the first direction Z and improving the energy density of the battery module 001. Figure 15 Figure 16 In some embodiments, referring to Figure 3 and , along the first direction Z, the top seal portion 1121 includes a first sub-side 1121a and a second sub-side 1121b, the first sub-side 1121a faces the first circuit board 200, and the second sub-side 1121b faces away from the first circuit board 200. The second sub-side 1121b includes an exposed area S1, which is exposed to the cladding 400, which is conducive to reducing the space occupied by the cladding 400 along the first direction Z and improving the energy density of the battery module 001.

[0168] In some embodiments, the second sub-side 1121b further includes a cladding area S2, which is located in the cladding 400. Wherein, along the first direction Z, the exposed area S1 overlaps the tab seal 140. Along the first direction Z, the projection of the tab seal 140 is located in the projection of the exposed area S1. The tab seal 140 occupies additional space, and by exposing the area of the top seal portion 1121 with the tab seal 140 to the cladding 400, it is conducive to improving the additional space occupied by the cladding 400 along the first direction Z and improving the energy density of the battery module 001.

[0169] Figure 1 In some embodiments, referring to Figure 13 , and Figure 16 , the battery module 001 further includes an insulating member 600, which covers the exposed area S1, which is conducive to protecting the exposed area S1 by the insulating member 600.

[0170] In some embodiments, the insulating member 600 covers the side of the cladding 400 along the first direction Z and the third direction Y, thereby protecting the components exposed to the cladding 400.

[0171] In some embodiments, the insulation piece 600 is an insulation tape. The overmold piece 400 formed by low pressure injection molding needs to reserve a gap between the to-be-injected part (such as the top sealing part 1121) and the mold when injection molding so that the liquid material enters the gap to overmold the part. Generally, the overmold piece 400 formed by solidification between the to-be-injected part and the mold is thicker than the insulation tape. Further covering the exposed area S1 with the insulation tape is more conducive to thinning the head of the battery module 001 than completely overmolding the second sub-side surface 1121b with the overmold piece 400.

[0172] Please refer to Figure 17 and Figure 18 In some embodiments, the battery module 001 includes two battery cells 100, and the two battery cells 100 are arranged side by side along the third direction Y.

[0173] The main body part 111 of each battery cell 100 includes a first side wall 1112a distributed along the third direction Y, and the packaging part 112 of each battery cell 100 includes a first side sealing part 1122a. The first side sealing part 1122a of the same battery cell 100 is connected to the first side wall 1112a and arranged opposite to the first side wall 1112a along the third direction Y. The first side sealing parts 1122a of the two battery cells 100 are arranged opposite to each other along the third direction Y.

[0174] The edge connecting part 1123 of each battery cell 100 includes a first edge connecting part 1123a. The first edge connecting part 1123a connects the first side sealing part 1122a and the top sealing part 1121. The first edge connecting parts 1123a of the two battery cells 100 are arranged adjacent to each other.

[0175] In some embodiments, the first edge connecting part 1123a includes a first sub-part 1123a1 and a second sub-part 1123a2. The first sub-part 1123a1 is arranged opposite to the top sealing part 1121 along the first direction Z. The second sub-part 1123a2 is arranged opposite to the top wall 1111 along the second direction X.

[0176] In some embodiments, the first circuit board 200 includes a first region 250, a second region 260, and a third region 270 distributed along a third direction Y. The first region 250 is located in the accommodating space 113 of a battery cell 100 and is disposed opposite to the top wall 1111 of the battery cell 100 along the second direction X. The third region 270 is located in the accommodating space 113 of another battery cell 100 and is disposed opposite to the top wall 1111 of the battery cell 100 along the second direction X. The second region 260 is disposed opposite to the first sub-parts 1123a1 of the two battery cells 100 along the first direction Z. The second region 260 is also disposed opposite to the second sub-parts 1123a2 of the two battery cells 100 along the second direction X. Two battery cells 100 are connected simultaneously by the first circuit board 200. The first sub-part 1123a1 is positioned opposite the top sealing part 1121 along the first direction Z, and the second sub-part 1123a2 is positioned opposite the top wall 1111 along the second direction X. The second region 260 of the first circuit board 200 is positioned opposite the first sub-part 1123a1 of the two battery cells 100 along the first direction Z. The second region 260 is also positioned opposite the second sub-part 1123a2 of the two battery cells 100 along the second direction X. This reduces the risk of interference between the first sealing edge connection part 1123a and the second region 260, facilitates increasing the width of the second region 260 along the first direction Z, and improves the onboard capacity of the first circuit board 200.

[0177] Please see Figure 18 and Figure 19 In some embodiments, the second sub-sections 1123a2 of the two battery cells 100 are covered by a shielding member 610, which covers a first gap between the second sub-sections 1123a2 of the two battery cells 100 and a second gap between the first sub-sections 1123a1 of the two battery cells 100, in order to improve the problem of molten adhesive entering between the two battery cells 100 when the overlay 400 is formed by low-pressure injection molding.

[0178] Please see Figure 17 and Figure 18 In some embodiments, a third gap is provided between the adjacent body portions 111 of the two battery cells 100, and the shielding member 610 also covers the portion of the third gap near the first sealing edge connection portion 1123a to improve the problem of molten adhesive entering between the two battery cells 100 when the cover 400 is formed by low-pressure injection molding.

[0179] Please see Figure 2 , Figure 17 and Figure 18In some embodiments, the main body part 111 of each battery cell 100 further comprises a second side wall 1112b distributed along the third direction Y, and the packaging part 112 of each battery cell 100 comprises a second side packaging part 1122b, the second side packaging part 1122b of the same battery cell 100 is connected to the second side wall 1112b and is arranged opposite to the second side wall 1112b along the third direction Y.

[0180] The edge connecting part 1123 of each battery cell 100 further comprises a second edge connecting part 1123b, the second edge connecting part 1123b is connected to the second side packaging part 1122b and the top packaging part 1121 away from the first edge connecting part 1123a along the third direction Y, the second edge connecting part 1123b comprises a third sub-part 1123b1 and a fourth sub-part 1123b2, the third sub-part 1123b1 is arranged opposite to the top packaging part 1121 along the first direction Z, and the fourth sub-part 1123b2 is arranged opposite to the top wall 1111 along the second direction X.

[0181] Please refer to Figure 17 and Figure 18 In some embodiments, the cladding member 400 further clads the third sub-part 1123b1 and the fourth sub-part 1123b2, the third sub-part 1123b1 is arranged opposite to the top packaging part 1121 along the first direction Z, and the fourth sub-part 1123b2 is arranged opposite to the top wall 1111 along the second direction X, which is conducive to the molten cladding member 400 flowing into the containing space 113, thereby improving the uniformity of the molding of the cladding member 400. At the same time, the third sub-part 1123b1 is arranged opposite to the top packaging part 1121 along the first direction Z, and the fourth sub-part 1123b2 is arranged opposite to the top wall 1111 along the second direction X, which is conducive to the molten cladding member 400 flowing into the containing space 113, thereby improving the uniformity of the molding of the cladding member 400.

[0182] In some embodiments, the cladding member 400 clads the top packaging part 1121, the protruding part 132, the first circuit board 200, the embedded part 510 and part of the lead-out part 520 of the two battery cells 100. The shielding member 610 covers the side surface of the cladding member 400 along the first direction Z and the third direction Y, thereby protecting the components that may be exposed on the cladding member 400.

[0183] In some embodiments, along the first direction Z, the first side surface 230 is provided with a second air-avoiding groove 232, and the first sub-part 1123a1 is located in the second air-avoiding groove 232. By providing the second air-avoiding groove 232 on the first side surface 230, the problem of interference between the first sub-part 1123a1 and the first circuit board 200 is improved.

[0184] Please refer to Figure 20 The embodiments of the present application also provide a power utilization device 002 comprising the battery module 001 in one or more of the above embodiments.

[0185] In addition, those skilled in the art will recognize that the above-described embodiments may readily be utilized as a basis for modifying or designing other structures for carrying out the same purposes of the present application. Therefore, it is meant to be encompassed by the present application that various changes and modifications of the above-described embodiments could be effected by those skilled in the art.

Claims

1. A battery module, characterized in that, include: A battery cell, the battery cell comprising a housing, an electrode assembly, and tabs; The housing includes a main body and a packaging part. The electrode assembly is housed in the main body. The main body includes a top wall. The packaging part includes a top sealing part connected to the top wall. An accommodating space is formed between the top wall and the top sealing part. The electrode tab includes a connecting part and a protruding part connected together. The connecting part is connected to the electrode assembly. The protruding part extends from the top sealing part. A first circuit board is housed in the accommodating space. The first circuit board includes a substrate connected to the protrusion. The thickness direction of the main body is a first direction. The thickness direction of the substrate intersects with the first direction. When viewed along the first direction, the substrate is located within the main body.

2. The battery module as described in claim 1, characterized in that, The first circuit board further includes electronic components. The substrate has a mounting surface, and the electronic components are disposed on the mounting surface. The mounting surface and the top wall are disposed opposite each other along a second direction, which is perpendicular to the first direction.

3. The battery module as described in claim 1, characterized in that, The protruding portion includes a first extension section and a second extension section. The first extension section includes a first sub-segment, a second sub-segment, and a bent section. The first sub-segment is connected to the connecting portion, the second sub-segment is connected to the second extension section, and the bent section connects the first sub-segment and the second sub-segment. The first sub-segment and the second sub-segment are arranged opposite to each other along the first direction. The second extension section is connected to the first circuit board and is arranged opposite to the first circuit board along the second direction, which is perpendicular to the first direction.

4. The battery module as described in claim 3, characterized in that, A recessed portion is provided between the second sub-segment and the second extension segment, and the recessed portion extends toward the top wall along the second direction.

5. The battery module as described in claim 3, characterized in that, Along the second direction, the distance between the bent section and the top wall is D1, the distance between the second extended section and the top wall is D2, and 0.1mm≤D1-D2≤2.5mm.

6. The battery module as described in claim 3, characterized in that, The battery module also includes an adapter, which includes a first segment, a second segment, and a third segment connected in sequence. The third segment is connected to the first circuit board. The second extension segment is located between the first segment and the third segment and is connected to the first segment. The first segment, the second extension segment, the third segment, and the first circuit board are stacked along the second direction.

7. The battery module as described in claim 2, characterized in that, The first circuit board also includes a protective adhesive, which is disposed on the mounting surface and covers the electronic components.

8. The battery module as described in claim 2, characterized in that, The first circuit board also includes a protective bracket having a protective cavity, within which the electronic components are located.

9. The battery module as described in claim 1, 7, or 8, characterized in that, The battery module further includes a cover and a second circuit board. The second circuit board includes an embedded part, a lead-out part, and an external part connected together. The embedded part is connected to the first circuit board and is disposed opposite to the first circuit board along a second direction. The lead-out part extends out from the cover and the external part is configured to connect to an external circuit. The cover covers the top seal, the lead-out part, the first circuit board, the embedded part, and part of the lead-out part. The second direction is perpendicular to the first direction.

10. The battery module as described in claim 9, characterized in that, The lead-out portion includes a first lead-out sub-port and a second lead-out sub-port connected together. The first lead-out sub-port is connected to the embedded portion and located inside the cover. The second lead-out sub-port is connected to the external portion and located outside the cover. The first lead-out sub-port forms an angle ∠a with the second direction, where 20°≤∠a≤60°.

11. The battery module as described in claim 9, characterized in that, The main body includes a sidewall, and the encapsulation part further includes a side sealing part and a sealing edge connecting part. The side sealing part is connected to the sidewall and is disposed opposite to it along a third direction. The sealing edge connecting part is connected to the side sealing part and the top sealing part. The first direction, the second direction and the third direction are perpendicular to each other. The covering includes a first covering portion and a second covering portion arranged along the third direction. The first covering portion covers the protruding portion and the first circuit board. The second covering portion covers the edge sealing connection portion. The embedded portion is located inside the first covering portion. The lead-out portion extends from the first covering portion to the second covering portion and extends out of the covering portion from the second covering portion. Along the second direction, the distance between the end face of the first covering portion away from the top wall and the top wall is L1, and the distance between the end face of the second covering portion away from the top wall and the top wall is L2, where 0.1mm≤L1-L2≤0.8mm.

12. The battery module as described in claim 11, characterized in that, The battery cell also includes a tab seal, which is located between the tab and the top seal, and the protrusion extends out from the tab seal. Along the third direction, the first covering portion has a first end face close to the second covering portion. The first end face extends along the second direction. The first end face and the top sealing end face are disposed opposite each other along the third direction. Along the third direction, the distance between the first end face and the tab seal is L3, 0.1mm≤L3≤0.6mm.

13. The battery module as described in claim 1, characterized in that, The battery cell also includes a tab seal, which is located between the tab and the top seal, and the protrusion extends out from the tab seal. Along the first direction, the first circuit board has a first side facing the top seal, the first side being provided with a first clearance groove, and the tab seal portion being located within the first clearance groove.

14. The battery module as described in claim 9, characterized in that, Along the first direction, the first circuit board has a second side facing away from the top seal, the second side being at least partially exposed in the cover.

15. The battery module as described in claim 12, characterized in that, Along the first direction, the top cover includes a first sub-side facing the first circuit board and a second sub-side facing away from the first circuit board, the second sub-side including an exposed area exposed to the cover.

16. The battery module as described in claim 15, characterized in that, The second sub-side also includes a covering area located within the covering member, and the exposed area overlaps with the tab seal along the first direction.

17. The battery module as described in claim 15, characterized in that, The battery module also includes an insulating component that covers the exposed area.

18. The battery module as described in claim 1, characterized in that, The battery module includes two battery cells, which are arranged side by side along a third direction. The main body portion of each of the battery cells includes a first sidewall, and the encapsulation portion of each of the battery cells includes a first side seal portion. The first side seal portion of the same battery cell is connected to the first sidewall and is disposed opposite to the first sidewall along the third direction. The first side seal portions of the two battery cells are disposed opposite to each other along the third direction. The encapsulation portion of each of the battery cells further includes a first edge sealing connection portion, which connects the first side sealing portion and the top sealing portion. The first edge sealing connection portions of the two battery cells are arranged adjacent to each other. The first edge sealing connection portion includes a first sub-part and a second sub-part. The first sub-part is arranged opposite to the top sealing portion along the first direction, and the second sub-part is arranged opposite to the top wall along the second direction. The first direction, the second direction and the third direction are perpendicular to each other. The first circuit board includes a first region, a second region, and a third region distributed along the third direction. The first region is located in the accommodating space of one of the battery cells and is disposed opposite to the top wall of the battery cell along the second direction. The third region is located in the accommodating space of another battery cell and is disposed opposite to the top wall of the battery cell along the second direction. The second region is disposed opposite to the first sub-parts of the two battery cells along the first direction. The second region is also disposed opposite to the second sub-parts of the two battery cells along the second direction.

19. The battery module as described in claim 18, characterized in that, The main body portion of each of the battery cells further includes a second sidewall distributed along a third direction, and the encapsulation portion of each of the battery cells includes a second side seal portion. The second side seal portion of the same battery cell is connected to the second sidewall and is disposed opposite to the second sidewall along the third direction. Each of the battery cells further includes a second edge sealing connection portion, which connects the second side sealing portion and the top sealing portion at one end away from the first edge sealing connection portion along the third direction. The second edge sealing connection portion includes a third sub-part and a fourth sub-part. The third sub-part is disposed opposite to the top sealing portion along the first direction, and the fourth sub-part is disposed opposite to the top wall along the second direction. The first direction, the second direction, and the third direction are perpendicular to each other. The battery module also includes a cover that covers the top seal, the protrusion, the third sub-section, and the fourth sub-section.

20. The battery module as described in claim 19, characterized in that, Along the first direction, the first circuit board has a first side facing the top seal portion, the first side is provided with a second clearance groove, and the first sub-part is located in the second clearance groove.

21. An electrical appliance, characterized in that, Includes the battery module as described in any one of claims 1 to 20.

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