Battery module and electrical device

Abstract

The present application relates to the technical field of energy storage, and in particular to a battery module and an electrical device. The battery module comprises a battery cell and a first circuit board. The battery cell comprises a housing, an electrode assembly, and a tab. The housing comprises a main body portion and a packaging portion. The electrode assembly is accommodated in the main body portion. The main body portion comprises a top wall. The packaging portion comprises a top sealing portion connected to the top wall. An accommodating space is formed between the top wall and the top sealing portion. The tab comprises a connection portion and an extension portion connected to each other. The connection portion is connected to the electrode assembly, and the extension portion extends out from the top sealing portion. The first circuit board is accommodated in the accommodating space. The first circuit board comprises a substrate, and the substrate is connected to the extension portion. A thickness direction of the main body portion serves as a first direction, and a thickness direction of the substrate intersects with the first direction, such that the thickness direction of the substrate can substantially face the main body portion, thereby reducing the space occupied by the substrate in a length direction of the battery module and increasing the energy density of the battery module.

Description

Battery modules and electrical equipment

[0001] This application claims priority to Chinese patent application 202411962541.2, filed on December 27, 2024. Technical Field

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

[0003] Currently, charging speed and temperature rise are two major factors affecting consumers' user experience in electronic products such as mobile phones, laptops, and tablets. With the continuous improvement of mobile phone performance and the widespread application of AI in recent years, the power consumption of the main unit is getting higher and higher, and mobile phone manufacturers are also constantly increasing their requirements for battery capacity. However, the space for batteries is constantly decreasing due to the compression of key components such as cameras and motherboards. Therefore, the demand for improving the energy density of battery modules is extremely strong. Summary of the Invention

[0004] In view of this, this application provides a battery module and an electrical device that can improve the energy density of the battery module.

[0005] In a first aspect, embodiments of this application provide a battery module, including a battery cell and a first circuit board. The battery cell includes a housing, an electrode assembly, and tabs. The housing includes a main body and a packaging portion. The electrode assembly is housed in the main body. The main body includes a top wall. The packaging portion includes a top seal connected to the top wall, forming an accommodating space between the top wall and the top seal. The tabs include a connecting portion and a protruding portion connected together. The connecting portion connects to the electrode assembly, and the protruding portion extends from the top seal. The first circuit board is housed in the accommodating space. The first circuit board includes a substrate, which is connected to the protruding portion. The thickness direction of the main body is a first direction, and the thickness direction of the substrate intersects with the first direction.

[0006] The first circuit board is housed in the accommodating space formed between the top wall and the top seal. Typically, the thickness dimension of the substrate is smaller than its width dimension, so that the thickness direction of the substrate of the first circuit board intersects with the thickness direction of the main body, thereby reducing the space occupied by the substrate in the extension direction of the top seal, which is beneficial to improving the energy density of the battery module.

[0007] In the above embodiments, the first circuit board further includes electronic components, the substrate has a mounting surface, 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, and the second direction is perpendicular to the first direction.

[0008] The mounting surface of the substrate and the top wall are positioned opposite each other along the second direction, so that the thickness direction of the substrate is parallel to the length direction of the main body, thereby reducing the space occupied by the substrate in the length direction of the battery module and increasing the energy density of the battery module.

[0009] In one or more of the above embodiments, the protrusion 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 bending section. The first sub-segment is connected to the connecting portion, the second sub-segment is connected to the second extension section, and the bending section is connected to 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 a first direction. The second extension section is connected to the first circuit board and is arranged opposite to the first circuit board along a second direction. The second direction is perpendicular to the first direction.

[0010] The bending section connects the first sub-segment and the second sub-segment, which are arranged opposite to each other along the first direction. The second extension section connects to the first circuit board and is arranged opposite to the first circuit board along the second direction, thereby shaping the protrusion and reducing the impact of the protrusion rebounding due to stress on the installation of the first circuit board, which is beneficial to controlling the position of the first circuit board in the receiving space.

[0011] In one or more of the above embodiments, a recess is provided between the second sub-segment and the second extension segment, and the recess extends toward the top wall in a second direction.

[0012] By shaping the protruding part of the electrode tab with the concave part, the impact of the protruding part rebounding due to stress on the mounting of the first circuit board is reduced.

[0013] In one or more of the above embodiments, along the second direction, the distance between the bent section and the top wall is D1, and the distance between the second extension section and the top wall is D2, where 0.1mm≤D1-D2≤2.5mm.

[0014] By controlling the difference between the distance D1 between the bent section and the top wall and the distance D2 between the second extension section and the top wall to between 0.1mm and 2.5mm, it is easier to place the first circuit board. When the difference between the distance D1 between the bent section and the top wall and the distance D2 between the second extension section and the top wall is greater than 2.5mm, there is insufficient space to accommodate the first circuit board, and the first circuit board may be easily damaged by pressure. When the difference between the distance D1 between the bent section and the top wall and the distance D2 between the second extension section 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 may exceed the product size range.

[0015] In one or more of the above embodiments, the battery module further 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, and a second extension segment is located between the first segment and the third segment and connected to the first segment. The first segment, the second extension segment, the third segment and the first circuit board are stacked along a second direction.

[0016] The first circuit board is connected to the third section of the adapter, while the second extension section is located between the first and third sections and connected to the first section, thereby allowing the protruding part of the electrode and the adapter to have a more flexible connection position, improving the convenience of connecting the electrode and the first circuit board.

[0017] In one or more of the above embodiments, the first circuit board further includes a protective adhesive, which is disposed on the mounting surface and covers the electronic components.

[0018] By applying protective adhesive to the mounting surface and covering the electronic components with it, the safety of the electronic components can be improved when assembling the first circuit board.

[0019] In one or more of the above embodiments, the first circuit board further includes a protective bracket having a protective cavity in which electronic components are located.

[0020] By placing electronic components within the protective cavity of a protective bracket, and protecting the electronic components through the protective bracket, the safety of the electronic components can be improved during the assembly of the first circuit board.

[0021] In one or more of the above embodiments, the battery module further includes a cover and a second circuit board. The second circuit board includes an embedded portion, a lead-out portion, and an external portion connected together. The embedded portion is connected to the first circuit board and is disposed opposite to the first circuit board along a second direction. The lead-out portion extends out from the cover and the external portion is configured to connect to an external circuit. The cover covers the top cover, the protruding portion, the first circuit board, the embedded portion, and part of the lead-out portion. The second direction is perpendicular to the first direction.

[0022] The sheathing component covers the top seal, the protrusion, the first circuit board, and the embedded portion, which helps to fix the relative positions of the top seal, the protrusion, the first circuit board, and the embedded portion. It also protects the electronic components and conducts heat to them, thereby reducing the temperature rise at the head of the battery module. The sheathing component also covers part of the lead-out portion, which improves the convenience of connecting the battery module to external circuits.

[0023] In one or more of the above embodiments, 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, and 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°.

[0024] By tilting the first lead-out portion, the length of the lead-out portion embedded in the cover is reduced, while the length of the second lead-out portion is increased, thereby improving the mobility and flexibility of the second circuit board. Controlling the angle between the first lead-out portion and the second direction between 20° and 60° helps improve the flexibility of the second circuit board extending from the cover. Forming the cover at the head of the battery module requires placing the battery module in a mold for low-pressure injection molding. When the angle between the first lead-out portion and the second direction is less than 20°, the risk of the mold having difficulty clamping the second circuit board increases. When the angle between the first lead-out portion and the second direction is greater than 60°, the first lead-out portion is embedded too much in the cover, and the portion of the lead-out portion extending out of the cover is too short, leading to increased risks of inconvenient connection between the second circuit board and external circuits and wasted material on the second circuit board.

[0025] In one or more of the above embodiments, the main body includes a sidewall, 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 each other along a third direction, the sealing edge connecting part is connected to the side sealing part and the top sealing part, and the first direction, the second direction and the third direction are perpendicular to each other;

[0026] The cover includes a first cover portion and a second cover portion arranged along a third direction. The first cover portion covers the protruding portion and the first circuit board. The second cover portion covers the edge sealing connection portion. The embedded portion is located inside the first cover portion. The lead-out portion extends from the first cover portion to the second cover portion and extends out of the cover from the second cover portion.

[0027] Along the second direction, the distance between the end face of the first covering part away from the top wall and the top wall is L1, and the distance between the end face of the second covering part away from the top wall and the top wall is L2, 0.1mm≤L1-L2≤0.8mm.

[0028] When the difference between the distance L2 between the end face of the second covering part away from the top wall and the top wall and the distance L1 between the end face of the first covering part away from the top wall and the top wall is less than 0.1 mm, the first lead-out sub-part is embedded too much in the covering part, and the part of the lead-out sub-part extending out of the covering part is too short, resulting in insufficient mobility of the second circuit board. When the difference between the distance L2 between the end face of the second covering part away from the top wall and the top wall and the distance L1 between the end face of the first covering part away from the top wall and the top wall is greater than 0.8 mm, it is not conducive to reducing the risk of the top sealing side and sealing edge connection part being exposed to the second covering part.

[0029] In one or more of the above embodiments, the battery cell further includes a tab seal, which is located between the tab and the top seal, and the protrusion extends out from the tab seal;

[0030] Along the third direction, the first covering part has a first end face close to the second covering part. 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 electrode seal is L3, 0.1mm≤L3≤0.6mm.

[0031] By controlling the distance between the first end face and the tab seal to between 0.1 mm and 0.6 mm, it is beneficial to reduce the influence of the first end face on the tab seal, so that the tab seal has sufficient connection strength.

[0032] In one or more of the above embodiments, the battery cell further includes a tab seal, which is located between the tab and the top seal, and the protrusion extends out from the tab seal;

[0033] Along the first direction, the first circuit board has a first side facing the top seal, and the first side is provided with a first clearance groove, with the electrode sealing part located in the first clearance groove.

[0034] A first clearance groove is provided on the first side of the first circuit board, and the tab sealing part is located in the first clearance groove. Along the first direction, the space occupied by the tab sealing part and the first circuit board is reduced, which is beneficial to improving the energy density of the battery assembly.

[0035] In one or more of the above embodiments, along the first direction, the first circuit board has a second side facing away from the top cover, and the second side is at least partially exposed in the cover.

[0036] The second side is at least partially exposed in the cladding, which helps to reduce the space occupied by the cladding in the first direction and improves the energy density of the battery module. At the same time, it can maximize the area of ​​the first circuit board in the first direction and improve the current carrying capacity of the first circuit board.

[0037] In one or more of the above embodiments, 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.

[0038] The exposed area on the second side is visible to the cover, which helps to reduce the space occupied by the cover in the first direction and improves the energy density of the battery module.

[0039] In one or more of the above embodiments, 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.

[0040] Along the first direction, the tab seal occupies an additional space. By exposing the area of ​​the top seal with the tab seal to the cover, it is beneficial to reduce the additional space occupied by the cover along the first direction and improve the energy density of the battery module.

[0041] In one or more of the above embodiments, the battery module further includes an insulating element that covers the exposed area.

[0042] The insulation part covers the exposed area, which helps to protect the exposed area through the insulation.

[0043] In one or more of the above embodiments, the battery module includes two cells, which are arranged side by side along a third direction;

[0044] The main body of each cell includes a first sidewall, and the encapsulation part of each cell includes a first side seal. The first side seal of the same cell is connected to the first sidewall and is disposed opposite to the first sidewall in a third direction. The first side seals of two cells are disposed opposite to each other in a third direction.

[0045] Each cell's encapsulation portion also 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 two 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 a first direction, and the second sub-part is arranged opposite to the top wall along a second direction. The first direction, the second direction, and the third direction are perpendicular to each other.

[0046] The first circuit board includes a first region, a second region, and a third region distributed along a third direction. The first region is located in the accommodating space of a battery cell and is disposed opposite to the top wall of the battery cell along a 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 a second direction. The second region is disposed opposite to the first sub-parts of the two battery cells along a first direction. The second region is also disposed opposite to the second sub-parts of the two battery cells along a second direction.

[0047] The first circuit board can connect two battery cells simultaneously. Furthermore, by setting the first sub-part opposite to the top sealing part along the first direction, setting the second sub-part opposite to the top wall along the second direction, setting the second region of the first circuit board opposite to the first sub-parts of the two battery cells along the first direction, and setting the second region opposite to the second sub-parts of the two battery cells along the second direction, the risk of interference between the first sealing edge connection part and the second region can be reduced, and the width of the second region can be increased along the first direction, thereby improving the onboard capacity of the first circuit board.

[0048] In one or more of the above embodiments, the main body of each cell further includes a second sidewall distributed along a third direction, and the encapsulation portion of each cell includes a second side seal portion. The second side seal portion of the same cell is connected to the second sidewall and is disposed opposite to the second sidewall along a third direction.

[0049] Each cell's encapsulation portion also includes a second edge sealing connection portion, which connects the second side seal portion and the top seal portion at one end away from the first edge sealing connection portion along a 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 seal portion along a first direction, and the fourth sub-part is disposed opposite to the top wall along a second direction. The first direction, the second direction, and the third direction are perpendicular to each other.

[0050] The battery module also includes a cover, which covers the top cover, the protrusion, the third sub-section, and the fourth sub-section.

[0051] The covering part covers the top sealing part, the protruding part, the third sub-part and the fourth sub-part, thereby protecting the second sealing edge connection part.

[0052] In one or more of the above embodiments, 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.

[0053] The first sub-section is located within the second recess, thereby improving the problem of the first sub-section occupying extra space and helping to increase the energy density of the battery module.

[0054] Secondly, embodiments of this application provide an electrical device including the battery module described in one or more of the above embodiments. Attached Figure Description

[0055] Figure 1 is a schematic diagram of the overall structure of a battery module in one embodiment of this application, showing the structure of a single cell.

[0056] Figure 2 is a schematic diagram showing the positional relationship between the main body and the first circuit board and the second circuit board in one embodiment of this application.

[0057] Figure 3 is a cross-sectional view of a battery module in one embodiment of this application.

[0058] Figure 4 is a cross-sectional view of the battery module in another embodiment of this application.

[0059] Figure 5 is a cross-sectional view of the battery module in another embodiment of this application.

[0060] Figure 6 is a cross-sectional view of the battery module in another embodiment of this application.

[0061] Figure 7 is a cross-sectional view of the battery module in another embodiment of this application.

[0062] Figure 8 is a cross-sectional view of the battery module in another embodiment of this application.

[0063] Figure 9 is a cross-sectional view of the battery module in another embodiment of this application.

[0064] Figure 10 is a cross-sectional view of the battery module in another embodiment of this application.

[0065] Figure 11 is a cross-sectional view of the battery module in another embodiment of this application.

[0066] Figure 12 is a cross-sectional view of the battery module in another embodiment of this application.

[0067] Figure 13 is a schematic diagram of the lead-out method of the second circuit board in one embodiment of this application.

[0068] Figure 14 is a schematic diagram of the lead-out method of the second circuit board in another embodiment of this application.

[0069] Figure 15 is a schematic diagram showing the positional relationship between the first circuit board and the top seal in one embodiment of this application.

[0070] Figure 16 is a schematic diagram of the positional relationship between the first circuit board and the top seal from another perspective in one embodiment of this application.

[0071] Figure 17 is a schematic diagram of the overall structure of the battery module in one embodiment of this application, showing the structure of a dual-cell battery.

[0072] Figure 18 is a schematic diagram of the assembly relationship between two battery cells and a first circuit board in one embodiment of this application.

[0073] Figure 19 is a schematic diagram of the positional relationship between the shielding component and the battery module in one embodiment of this application.

[0074] Figure 20 is a schematic diagram of the structure of an electrical device in one embodiment of this application.

[0075] Key component symbols: 001, Battery module; 1123b1, Third sub-section; 231, First clearance slot; 100, Battery cell; 1123b2, Fourth sub-section; 232, Second clearance slot; 110, Housing; 113, Accommodation space; 240, Second side surface; 111, Main body; 130, Terminal tab; 250, First region; 1111, Top wall; 131, Connecting part; 260, Second region; 1112, Side wall; 132, Protrusion; 270, Third region; 1112a, First side wall; 1321, First extension section; 300, Adapter; 1112b, Second side wall; 1321a, First sub-segment; 310, First segment; 112, Encapsulation part; 1321b, Bending section; 320. Second segment; 1121. Top seal; 1321c. Second sub-segment; 330. Third segment; 1121a. First sub-side surface; 1321d. Recessed portion; 400. Covering component; 1121b. Second sub-side surface; 1322. Second extension segment; 410. First covering portion; 1121c. Top seal body; 1323. Third extension segment; 411. First end face; 1121c1. Top seal end face; 1324. Fourth extension segment; 420. Second covering portion; 1121d. Top seal side; 140. Electrode seal; 500. Second circuit board; S1. Exposed area; 200. First circuit board; 510. Embedded portion; S2. Covered area; 210. Substrate; 520. Lead-out portion; 1122. Side seal; 211. Mounting surface; 521. First lead-out sub-part; 1122a. First side seal; 212. Connecting surface; 522. Second lead-out sub-part; 1122b. Second side seal; 213. Adapter surface; 530. External part; 1123. Edge sealing connection part; 220. Electronic component; 600. Insulating component; 1123a. First edge sealing connection part; 221. Protective adhesive; 610. Shielding component; 1123a1. First sub-part; 222. Protective bracket; 002. Electrical equipment; 1123a2. Second sub-part; 2221. Protective cavity; Z. First direction; 1123b. Second edge sealing connection part; 230. First side surface;X, second direction; Y, third direction. Detailed Implementation

[0076] The technical solutions of the embodiments of this application will be described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments.

[0077] It should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection. When a component is considered to be "connected" to another component, it can be directly connected to the other component or there may be an intervening component present. When a component is considered to be "located" to another component, it can be directly mounted on the other component or there may be an intervening component present.

[0078] Unless otherwise stated, the term "multiple" as used herein refers to two or more.

[0079] The terms “first”, “second”, etc., are used only to distinguish different objects and should not be construed as indicating or implying relative importance or implying the quantity, specific order, or primary and secondary relationship of the indicated technical features.

[0080] The term "perpendicular" is used to describe an ideal state between two components. In actual production or use, two components can exist in a state that is approximately perpendicular. For example, in numerical terms, perpendicularity can refer to the angle between two straight lines within the range of 90° ± 10°, the dihedral angle between two planes within the range of 90° ± 10°, or the angle between a straight line and a plane within the range of 90° ± 10°.

[0081] The term "parallel" is used to describe an ideal state between two components. In actual production or use, two components can exist in a state that is approximately parallel. For example, in numerical terms, parallel can refer to the angle between two straight lines within the range of 180° ± 10°, the dihedral angle between two planes within the range of 180° ± 10°, or the angle between a straight line and a plane within the range of 180° ± 10°.

[0082] It should be noted that when a parameter is greater than, equal to or less than a certain endpoint value, it should be understood that the endpoint value is allowed to have a tolerance of ±5%.

[0083] It should be understood that the dimensions of the structures shown in the accompanying drawings are provided for better understanding and easier description, and this application is not limited to the dimensions shown in the drawings. For the sake of clarity, elements unrelated to the description have been omitted from the details of this specification.

[0084] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application.

[0085] The following detailed description of some embodiments of this application is provided in conjunction with the accompanying drawings. Unless otherwise specified, the embodiments and features described below can be combined with each other.

[0086] Please refer to Figures 1 to 3. An embodiment of this application provides a battery module 001, including a battery cell 100 and a first circuit board 200, wherein the first circuit board 200 is disposed at the head of the battery cell 100. Specifically, the battery cell 100 includes a housing 110, an electrode assembly (not shown), and tabs 130. The housing 110 includes a main body portion 111 and an encapsulation portion 112, and the electrode assembly is housed in the main body portion 111.

[0087] The main body 111 includes a top wall 1111, the encapsulation part 112 includes a top sealing part 1121 connected to the top wall 1111, and the electrode tab 130 includes a connecting part 131 and a protrusion 132 connected to each other. The connecting part 131 is connected to the electrode assembly, and the protrusion 132 extends out from the top sealing part 1121.

[0088] A receiving space 113 is formed between the top wall 1111 and the top sealing part 1121, and the first circuit board 200 is housed in the receiving space 113.

[0089] In some embodiments, the first circuit board 200 includes a substrate 210 connected to the protrusion 132. The thickness direction of the main body 111 is defined as the first direction Z, and the thickness direction of the substrate 210 intersects with the first direction Z. Since the first circuit board 200 is housed within the accommodating space 113 formed between the top wall 1111 and the top sealing portion 1121, the thickness dimension of the substrate 210 is typically smaller than its width dimension. This allows the thickness direction of the substrate 210 of the first circuit board 200 to intersect with the thickness direction of the main body 111, thereby reducing the space occupied by the substrate 210 in the extending direction of the top sealing portion 1121, which is beneficial for improving the energy density of the battery module 001.

[0090] In some embodiments, the first circuit board 200 further includes an electronic component 220, and the substrate 210 has a mounting surface 211, on which the electronic component 220 is disposed. The mounting surface 211 and the top wall 1111 are disposed opposite each other along the second direction X, so that the thickness direction of the substrate 210 is parallel to the length direction of the main body 111, thereby reducing the space occupied by the substrate 210 in the length direction of the battery module 001 and improving the energy density of the battery module 001.

[0091] Wherein, the second direction X is perpendicular to the first direction Z, and the second direction X is the length direction of the main body 111.

[0092] In some embodiments, the battery cell 100 further includes a tab seal 140, which is located between the tab 130 and the top seal 1121. The protrusion 132 extends out from the tab seal 140, and the tab seal 140 seals the gap between the tab 130 and the top seal 1121, thereby improving the sealing performance of the housing 110.

[0093] In some embodiments, the protrusion 132 includes a first extension 1321 and a second extension 1322. The first extension 1321 is connected to the connecting portion 131, and the second extension 1322 is connected to the first circuit board 200 and is disposed opposite to the first circuit board 200 along a second direction X. In some embodiments, a recess 1321d is provided between the first extension 1321 and the second extension 1322. The recess 1321d extends toward the top wall 1111 along the second direction X. The recess 1321d shapes the protrusion 132 of the tab 130, reducing the impact of the protrusion 132 rebounding due to stress on the installation of the first circuit board 200.

[0094] In some embodiments, the first extension 1321 includes a first sub-segment 1321a, a second sub-segment 1321c, and a bent segment 1321b connected together. The first sub-segment 1321a connects to the connecting portion 131, the second sub-segment 1321c connects to the second extension 1322, and the bent segment 1321b connects the first sub-segment 1321a and the second sub-segment 1321c. The first sub-segment 1321a and the second sub-segment 1321c are disposed opposite each other along a first direction Z. A recessed portion 1321d is disposed between the second sub-segment 1321c and the second extension 1322.

[0095] Firstly, the bent segment 1321b connects the first sub-segment 1321a and the second sub-segment 1321c, which are positioned opposite each other along the first direction Z. The second extension segment 1322 connects to the first circuit board 200 and is positioned opposite to the first circuit board 200 along the second direction X. The recessed portion 1321d connects the second sub-segment 1321c and the first extension segment 2321, thereby shaping the protruding portion 132 and reducing the impact of the protruding portion 132 rebounding due to stress on the installation of the first circuit board 200, which is beneficial for controlling the position of the first circuit board 200 in the receiving space 113. Secondly, by setting the first sub-segment 1321a, the second sub-segment 1321c, and the bent segment 1321b, the first extension segment 1321 can act as a buffer to accommodate the protruding portion 132 that is too long due to tolerance settings, so as to facilitate the connection between the second extension segment 1322 and the first circuit board 200.

[0096] In some embodiments, along the second direction X, the distance between the bent segment 1321b and the top wall 1111 is D1, and the distance between the second extension segment 1322 and the top wall 1111 is D2, where 0.1mm ≤ D1 - D2 ≤ 2.5mm. By controlling the difference between the distance D1 between the bent segment 1321b and the top wall 1111 and the distance D2 between the second extension segment 1322 and the top wall 1111, which is 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 bent segment 1321b and the top wall 1111 and the distance D2 between the second extension segment 1322 and the top wall 1111 is greater than 2.5mm, there is insufficient accommodating space 113, insufficient space to place the first circuit board 200, and the first circuit board 200 is prone to damaging the main body 111. When the difference between the distance D1 between the bent 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, the tab 130 itself has thickness and assembly tolerance, which may lead to the risk that the tab 130 exceeds the product size range.

[0097] In some embodiments, the battery module 001 further includes an adapter 300, which includes 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, and a second extension segment 1322 is 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 a second direction X. By connecting the third segment 330 of the adapter 300 to the first circuit board 200, and by having the second extension segment 1322 located between the first segment 310 and the third segment 330 and connected to the first segment 310, the extension portion 132 of the tab 130 and the adapter 300 have a more flexible connection position, improving the connection convenience between the tab 130 and the first circuit board 200.

[0098] In some embodiments, the adapter 300 is a nickel sheet.

[0099] In some embodiments, the adapter 300 is block-shaped, disposed between the first circuit board 200 and the second extension 1322, and electrically connected to the first circuit board 200 and the second extension 1322.

[0100] Please refer to Figure 4. In some embodiments, the adapter 300 is a nickel brick and has a single-layer structure.

[0101] Please refer to Figure 5. In some embodiments, the second extension 1322 is directly connected to the first circuit board 200.

[0102] Referring to Figure 6, in some embodiments, the battery module 001 further includes an adapter 300, which includes a first segment 310, a second segment 320, and a third segment 330 connected together. The third segment 330 is connected to the first circuit board 200. The second segment 320 is located on the side of the first segment 310 and the third segment 330 near the top seal 1121.

[0103] The protrusion 132 includes a first extension 1321, a second extension 1322, and a third extension 1323. The third extension 1323 connects to the end of the second extension 1322 away from the first extension 1321. The second extension 1322 and the third extension 1323 are arranged opposite to each other along the second direction X. The third extension 1323 extends from the side of the first segment 310 away from the second segment 320 into the space between the first segment 310 and the third segment 330, and connects to the surface of the first segment 310 facing the third segment 330. The second extension 1322, the first segment 310, the third extension 1323, the third segment 330, and the first circuit board 200 are stacked sequentially along the second direction X. Compared to the second extension 1322 being connected to the first extension 310, by adding a third extension 1323 at the end of the second extension 1322 away from the first extension 1321, the overall length of the protrusion 132 is increased, thereby increasing the welding area available for the protrusion 132 and reducing the risk of increasing the process due to the need to cut the tab seal 140 to increase the welding area.

[0104] Referring to Figure 7, in some embodiments, the substrate 210 also has a transition surface 213, which is disposed opposite to the top wall 1111 along the second direction X.

[0105] The battery module 001 also includes an adapter 300, which is disposed on the adapter surface 213. The adapter 300 includes a first segment 310, a second segment 320, and a third segment 330 connected together. The second segment 320 is located on the side of the first segment 310 and the third segment 330 away from the top seal portion 1121. The third segment 330 is disposed opposite to the first segment 310 along the second direction X, and the third segment 330 is connected to the adapter surface 213. The first segment 310 is connected to the protrusion portion 132.

[0106] The protrusion 132 includes a first extension 1321, a second extension 1322, and a third extension 1323 connected together. The third extension 1323 connects to the end of the second extension 1322 away from the first extension 1321. The third extension 1323 is located between the transition surface 213 and the top wall 1111. The second extension 1322 is disposed opposite to the substrate 210 and the top sealing portion 1121 along the first direction Z.

[0107] The third extension segment 1323 extends from the side of the first segment 310 away from the second segment 320 into the space between the first segment 310 and the third segment 330, and connects to the surface of the first segment 310 facing the third segment 330.

[0108] In some embodiments, the transition surface 213 and the mounting surface 211 are located on the same plane.

[0109] In other embodiments, the transition surface 213 and the mounting surface 211 are located on different planes.

[0110] Referring to Figure 8, in some embodiments, the substrate 210 also has a transition surface 213, which is disposed opposite to the top wall 1111 along the second direction X.

[0111] The battery module 001 also includes an adapter 300, which is disposed on the adapter surface 213. The adapter 300 includes a first segment 310, a second segment 320, and a third segment 330 connected together. The second segment 320 is located on the side of the first segment 310 and the third segment 330 near the top seal 1121. The third segment 330 is disposed opposite to the first segment 310 along the second direction X, and the third segment 330 is connected to the adapter surface 213. The first segment 310 is connected to the protrusion 132.

[0112] The protrusion 132 includes a first extension 1321, a second extension 1322, a third extension 1323, and a fourth extension 1324. The second extension 1322 connects the first extension 1321 and the fourth extension 1324, and the fourth extension 1324 connects the second extension 1322 and the third extension 1323. The third extension 1323, the first circuit board 200, and the second extension 1322 are stacked sequentially along a second direction X, while the fourth extension 1324, the first circuit board 200, and the top sealing portion 1121 are stacked sequentially along a first direction Z.

[0113] The third extension 1323 connects to the end of the fourth extension 1324 away from the second extension 1322. The third extension 1323 extends from the side of the first segment 310 away from the second segment 320 into the space between the first segment 310 and the third segment 330, and connects to the surface of the first segment 310 facing the third segment 330.

[0114] Referring to Figure 9, in some embodiments, the first circuit board 200 includes a substrate 210 and electronic components 220. The substrate 210 has a mounting surface 211, which is disposed toward the top wall 1111. The electronic components 220 are disposed on the mounting surface 211.

[0115] The protrusion 132 includes a first extension 1321, a second extension 1322, and a third extension 1323, with the third extension 1323 connecting to the end of the second extension 1322 away from the first extension 1321. The substrate 210 has a connection surface 212 facing the top seal 1121, and the third extension 1323 is connected to the connection surface 212. The substrate 210, the third extension 1323, and the top seal 1121 are arranged along a first direction Z, thereby reducing the space occupied by the connection structure between the first circuit board 200 and the protrusion 132 in the second direction X, and increasing the energy density of the secondary battery 001.

[0116] In some embodiments, the battery module 001 further includes an adapter (not shown), which is disposed between the connecting surface 212 and the third extension 1323 and connects the third extension 1323 and the connecting surface 212. The substrate 210, the adapter, the third extension 1323, and the top seal 1121 are arranged along the first direction Z, which helps to reduce the space occupied by the adapter in the second direction X and improve the energy density of the secondary battery 001.

[0117] Referring to Figure 10, in some embodiments, the first circuit board 200 includes a substrate 210 and electronic components 220. The substrate 210 has a mounting surface 211 disposed toward the top wall 1111, and the electronic components 220 are disposed on the mounting surface 211.

[0118] The protrusion 132 includes a first extension 1321, a second extension 1322, a fourth extension 1324, and a third extension 1323 connected together. The second extension 1322 connects the first extension 1321 and the fourth extension 1324, and the fourth extension 1324 connects the second extension 1322 and the third extension 1323. The third extension 1323, the substrate 210, and the top sealing portion 1121 are stacked sequentially along the first direction Z, while the top wall 1111, the first circuit board 200, and the fourth extension 1324 are stacked sequentially along the second direction X.

[0119] The substrate 210 has a connection surface 212 on the side away from the top seal 1121, and the third extension 1323 is connected to the connection surface 212, thereby reducing the space occupied by the connection structure between the first circuit board 200 and the extension 132 in the second direction X and increasing the energy density of the secondary battery 001.

[0120] In some embodiments, the battery module 001 further includes an adapter (not shown), which is disposed between the connecting surface 212 and the third extension 1323 and connects the third extension 1323 and the connecting surface 212. The third extension 1323, the adapter, the substrate 210, and the top seal 1121 are arranged along the first direction Z, which helps to reduce the space occupied by the adapter in the second direction X and improve the energy density of the secondary battery 001.

[0121] Referring to Figure 11, in some embodiments, the first circuit board 200 further includes a protective adhesive 221, which is disposed on the mounting surface 211 and covers the electronic component 220. By providing the protective adhesive 221 on the mounting surface 211 and covering the electronic component 220 with the protective adhesive 221, it is beneficial to improve the safety of the electronic component 220 when assembling the first circuit board 200.

[0122] In some embodiments, the battery module 001 further includes a cover 400, which covers the top seal 1121, the protrusion 132, the substrate 210, and the protective adhesive 221.

[0123] Referring to Figure 12, in some embodiments, the first circuit board 200 further includes a protective bracket 222. The protective bracket 222 has a protective cavity 2221, the opening of which faces the top seal 1121. The first circuit board 200 can at least partially enter the protective cavity 2221 through the opening, and the electronic component 220 is located within the protective cavity 2221. By placing the electronic component 220 within the protective cavity 2221 of the protective bracket 222, and protecting the electronic component 220 by the protective bracket 222, the safety of the electronic component 220 is improved during the assembly of the first circuit board 200.

[0124] In some embodiments, the protective bracket 222 is a one-piece molded plastic part.

[0125] Please refer to Figures 2 and 13. In some embodiments, the battery module 001 further includes a cover 400 that covers the top seal 1121, the protrusion 132, and the first circuit board 200.

[0126] In some embodiments, a portion of the cover 400 is located in the gap between the top seal 1121, the protrusion 132, and the first circuit board 200.

[0127] In some embodiments, the covering 400 is made of resin material. The molten covering 400 fills the gap between the top seal 1121, the protrusion 132 and the first circuit board 200. After cooling and solidification, the covering 400 covers the top seal 1121, the protrusion 132 and the first circuit board 200, and fixes the relative positions of the top seal 1121, the protrusion 132 and the first circuit board 200. At the same time, it protects the electronic component 220 and conducts heat to the electronic component 220, thereby reducing the temperature rise of the battery module 001 head.

[0128] In some embodiments, the battery module 001 further includes a second circuit board 500. The second circuit board 500 includes an embedded portion 510, a lead-out portion 520 and an external portion 530 connected to each other. The embedded portion 510 is connected to the first circuit board 200 and is disposed opposite to the first circuit board 200 along a second direction X.

[0129] The lead-out portion 520 extends from the cover 400, and the external connection portion 530 is configured to connect to an external circuit. The cover 400 covers the top cover portion 1121, the protrusion portion 132, the first circuit board 200, the embedded portion 510, and a portion of the lead-out portion 520, with the second direction X perpendicular to the first direction Z.

[0130] Referring to Figures 2 and 14, in some embodiments, the lead-out portion 520 includes a first lead-out sub-port 521 and a second lead-out sub-port 522 connected together. The first lead-out sub-port 521 is connected to the embedded portion 510 and located within the cover member 400, while the second lead-out sub-port 522 is connected to the external portion 530 and located outside the cover member 400. The first lead-out sub-port 521 forms an angle ∠a with the second direction X, where 20° ≤ ∠a ≤ 60°. By tilting the first lead-out sub-port 521, the length of the lead-out portion 520 embedded in the cover member 400 is reduced, and the length of the second lead-out sub-port 522 is increased, thereby improving the mobility and flexibility of the second circuit board 500. Forming the cover 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-port 521 and the second direction X is less than 20°, the risk of the mold having difficulty clamping the second circuit board 500 increases. When the angle between the first lead-out sub-part 521 and the second direction X is greater than 60°, the first lead-out sub-part 521 is embedded too much in the cover member 400, and the part of the lead-out part 520 extending out of the cover member 400 is too short, which increases the risk of inconvenience in connecting the second circuit board 500 to the external circuit and waste of the material of the second circuit board 500.

[0131] In some embodiments, the second circuit board 500 is a flexible circuit board.

[0132] In some embodiments, the first circuit board 200 is a rigid circuit board.

[0133] Please refer to Figures 2 and 13. In some embodiments, the main body 111 includes sidewalls 1112 distributed along a third direction Y, where the third direction Y is the width direction of the main body 111.

[0134] The encapsulation part 112 also includes a side sealing part 1122 and a sealing edge connecting part 1123. The side sealing part 1122 is connected to the side wall 1112 and is arranged opposite to each other along the third direction Y. The sealing edge connecting part 1123 is connected to the side sealing part 1122 and the top sealing part 1121. The first direction Z, the second direction X and the third direction Y are perpendicular to each other.

[0135] In some embodiments, the top sealing portion 1121 includes a top sealing body 1121c and a top sealing side 1121d arranged along a third direction Y, with the connecting portion 1123 and the tab seal 140 both located in the top sealing body 1121c. Along the third direction Y, the top sealing body 1121c has a top sealing end face 1121c1 near the top sealing side 1121d, and the top sealing end face 1121c1 extends along a second direction X. In some embodiments, the covering member 400 includes a first covering portion 410 and a second covering portion 420 arranged along a third direction Y. The first covering portion 410 covers the protrusion 132 and the first circuit board 200, and the second covering portion 420 covers the top sealing side 1121d and the sealing edge connecting portion 1123.

[0136] The first covering part 410 covers the top seal body 1121c, and the second covering part 420 covers the top seal side 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.

[0137] The embedded portion 510 is located within the first covering portion 410, and the lead-out portion 520 extends from the first covering portion 410 to the second covering portion 420 and extends out of the covering member 400 from the second covering portion 420. Along the second direction X, the distance between the end face of the first covering 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 covering portion 420 away from the top wall 1111 and the top wall 1111 is L2, where 0.1mm≤L1-L2≤0.8mm. When the difference between the distance L2 between the end face of the second covering portion 420 away from the top wall 1111 and the distance L1 between the end face of the first covering portion 410 away from the top wall 1111 and the top wall 1111 is less than 0.1 mm, the first lead-out portion 521 is embedded too much in the covering member 400, and the portion of the lead-out portion 520 extending out of the covering member 400 is too short, resulting in insufficient mobility of the second circuit board 500. When the difference between the distance L2 between the end face of the second covering portion 420 away from the top wall 1111 and the distance L1 between the end face of the first covering 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 sealing side 1121d and the sealing edge connection portion 1123 being exposed to the second covering portion 420.

[0138] In some embodiments, along the third direction Y, the first covering portion 410 has a first end face 411 near the second covering portion 420. The first end face 411 extends along the second direction X, and the first end face 411 and the top sealing end face 1121c1 are disposed opposite each other 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, where 0.1mm≤L3≤0.6mm.

[0139] In some embodiments, along the second direction X, the height of the first end face 411 is H, where H = L1 - L2.

[0140] Referring to Figures 2 and 15, in some embodiments, along the first direction Z, the first circuit board 200 has a first side surface 230 facing the top seal portion 1121. The first side surface 230 is provided with a first clearance groove 231. The tab seal 140 is partially located in the first clearance groove 231. Along the first direction Z, the space occupied by the tab seal 140 and the first circuit board 200 is reduced, which is beneficial to improving the energy density of the battery assembly.

[0141] In some embodiments, along the first direction Z, the first circuit board 200 has a second side 240 facing away from the top cover portion 1121. The second side 240 is at least partially exposed to the cover portion 400, which helps to reduce the space occupied by the cover portion 400 in the first direction Z and helps to improve the energy density of the battery module 001.

[0142] Referring to Figures 15 and 16 and in conjunction with Figure 3, in some embodiments, along the first direction Z, the top cover 1121 includes a first sub-side surface 1121a and a second sub-side surface 1121b. The first sub-side surface 1121a faces the first circuit board 200, and the second sub-side surface 1121b faces away from the first circuit board 200. The second sub-side surface 1121b includes an exposed area S1, which is exposed to the cover 400. This helps to reduce the space occupied by the cover 400 in the first direction Z and helps to improve the energy density of the battery module 001.

[0143] In some embodiments, the second sub-side 1121b further includes a covering region S2 located within the covering member 400. Along the first direction Z, the exposed region S1 overlaps with the tab seal 140. Along the first direction Z, the projection of the tab seal 140 lies within the projection of the exposed region S1. The tab seal 140 occupies additional space; by exposing the area of ​​the top seal 1121 with the tab seal 140 within the covering member 400, it is beneficial to reduce the additional space occupied by the covering member 400 along the first direction Z, thereby increasing the energy density of the battery module 001.

[0144] Please refer to Figures 1, 13 and 16. In some embodiments, the battery module 001 also includes an insulating member 600, which covers the exposed area S1, thereby facilitating the protection of the exposed area S1 by the insulating member 600.

[0145] In some embodiments, the insulating member 600 covers the sides of the covering member 400 along the first direction Z and the third direction Y, thereby protecting the components exposed on the covering member 400.

[0146] In some embodiments, the insulating element 600 is insulating tape. When the encapsulation element 400 is formed by low-pressure injection molding, a certain gap needs to be left between the part to be injection molded (such as the top seal 1121) and the mold to allow liquid adhesive to enter the gap and encapsulate the part. Typically, the encapsulation element 400, which is cured between the part to be injection molded and the mold, is thicker than the insulating tape. Using insulating tape to further cover the exposed area S1 is more beneficial for thinning the head of the battery module 001 compared to completely covering the second sub-side 1121b with the encapsulation element 400.

[0147] Please refer to Figures 17 and 18. In some embodiments, the battery module 001 includes two cells 100, which are arranged side by side along a third direction Y.

[0148] Each cell 100 has a main body 111 including a first sidewall 1112a distributed along a third direction Y, and a packaging portion 112 of each cell 100 including a first side seal portion 1122a. The first side seal portion 1122a of the same cell 100 is connected to the first sidewall 1112a and is disposed opposite to the first sidewall 1112a along a third direction Y. The first side seal portions 1122a of two cells 100 are disposed opposite to each other along a third direction Y.

[0149] Each battery cell 100 has an edge sealing connection portion 1123 including a first edge sealing connection portion 1123a, which connects the first side sealing portion 1122a and the top sealing portion 1121. The first edge sealing connection portions 1123a of two battery cells 100 are arranged adjacent to each other.

[0150] In some embodiments, the first edge sealing connection portion 1123a includes a first sub-portion 1123a1 and a second sub-portion 1123a2. The first sub-portion 1123a1 is disposed opposite to the top sealing portion 1121 along the first direction Z, and the second sub-portion 1123a2 is disposed opposite to the top wall 1111 along the second direction X.

[0151] 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.

[0152] Referring to Figures 18 and 19, in some embodiments, the second sub-sections 1123a2 of the two cells 100 are covered by a shielding member 610, which covers the first gap between the second sub-sections 1123a2 of the two cells 100. The shielding member 610 also covers the second gap between the first sub-sections 1123a1 of the two cells 100, in order to improve the problem of molten adhesive entering between the two cells 100 when the overlay 400 is formed by low-pressure injection molding.

[0153] Please refer to Figures 17 and 18. In some embodiments, there is a third gap between the adjacent body portions 111 of the two cells 100. 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 cells 100 when the cover 400 is formed by low-pressure injection molding.

[0154] Please refer to Figures 2, 17 and 18. In some embodiments, the main body 111 of each cell 100 further includes a second sidewall 1112b distributed along a third direction Y. The encapsulation portion 112 of each cell 100 includes a second side seal portion 1122b. The second side seal portion 1122b of the same cell 100 is connected to the second sidewall 1112b and is disposed opposite to the second sidewall 1112b along a third direction Y.

[0155] Each cell 100 also includes a second sealing connection portion 1123b, which connects the second side sealing portion 1122b and the top sealing portion 1121 at one end away from the first sealing connection portion 1123a along the third direction Y. The second sealing connection portion 1123b includes a third sub-part 1123b1 and a fourth sub-part 1123b2. The third sub-part 1123b1 is disposed opposite to the top sealing portion 1121 along the first direction Z, and the fourth sub-part 1123b2 is disposed opposite to the top wall 1111 along the second direction X.

[0156] Referring to Figures 17 and 18, in some embodiments, the covering 400 further covers a third sub-part 1123b1 and a fourth sub-part 1123b2. The third sub-part 1123b1 is disposed opposite to the top sealing part 1121 along the first direction Z, and the fourth sub-part 1123b2 is disposed opposite to the top wall 1111 along the second direction X. This facilitates the covering 400 covering the second sealing edge connection part 1123b, thereby protecting the second sealing edge connection part 1123b. Simultaneously, the third sub-part 1123b1 being disposed opposite to the top sealing part 1121 along the first direction Z, and the fourth sub-part 1123b2 being disposed opposite to the top wall 1111 along the second direction X, facilitates the flow of the molten covering 400 into the receiving space 113, improving the uniformity of the forming of the covering 400.

[0157] In some embodiments, the cover 400 simultaneously covers the top seal 1121, the protrusion 132, the first circuit board 200, the embedded portion 510, and a portion of the lead-out portion 520 of both battery cells 100. The shield 610 covers the sides of the cover 400 along the first direction Z and the third direction Y, thereby protecting components that may be exposed to the cover 400.

[0158] In some embodiments, a second clearance groove 232 is provided on the first side surface 230 along the first direction Z, and the first sub-part 1123a1 is located within the second clearance groove 232. By providing the second clearance groove 232 on the first side surface 230, it is beneficial to improve the problem of interference between the first sub-part 1123a1 and the first circuit board 200.

[0159] Please refer to Figure 20. An embodiment of this application also provides an electrical device 002, which includes the battery module 001 in one or more of the above embodiments.

[0160] Furthermore, those skilled in the art should recognize that the above embodiments are merely illustrative of this application and are not intended to limit this application. Any appropriate changes and variations made to the above embodiments within the essential spirit and scope of this application fall within the scope of this application's disclosure.

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, which is connected to the protrusion. The thickness direction of the main body is a first direction, and the thickness direction of the substrate intersects with the first direction.

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 along the first direction, the exposed area overlaps with the tab seal.

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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