Battery module, battery pack and electric device

Abstract

The application provides a battery module, a battery pack and a power utilization device, and relates to the technical field of batteries. The battery module comprises a plurality of batteries, at least part of the batteries being arranged along a first direction; the batteries are provided with electric connecting members, the electric connecting members comprising first electric connecting members; the first electric connecting members of at least part of the batteries have a bending structure, the bending structure comprising a connecting portion and a bending portion, the bending portion connecting the battery and the connecting portion, and the extension direction of the connecting portion and the first direction having an included angle; in the two adjacent batteries, the connecting portion of the first electric connecting member of one battery is connected with the electric connecting member of the other battery. The battery module provided by the application can directly connect the electric connecting members of the two adjacent batteries, eliminates the dependence on external connecting components, can simplify the connecting process of the batteries, reduces the production cost, saves the internal space of the battery module, and improves the overall performance and efficiency.

Description

Technical Field

[0001] This application relates to the field of battery technology, and in particular to a battery module, battery pack and electrical equipment. Background Technology

[0002] Connecting batteries in series and parallel can change the operating voltage and capacitance of the battery pack, meeting the needs of high-voltage, high-energy applications such as electric vehicles and energy storage systems, improving energy efficiency, and flexibly adapting to electronic devices with different power and voltage requirements.

[0003] In related technologies, due to the limitations of battery pack terminal size, batteries can typically only be stacked along their length or width. Battery tabs usually extend from a single end face of the battery to facilitate current input and output. Series or parallel connections between batteries require external connecting components, such as connectors or circuit boards.

[0004] However, external connection components occupy battery pack space and have complex connection processes. They also increase current density and loop resistance, affecting the overall performance and efficiency of the battery pack. Utility Model Content

[0005] To address at least one problem existing in the prior art, embodiments of this application provide a battery module, a battery pack, and an electrical device.

[0006] In a first aspect, this application provides a battery module, including a plurality of batteries, at least some of which are arranged along a first direction; the batteries are provided with electrical connectors, the electrical connectors including a first electrical connector;

[0007] At least a portion of the first electrical connectors of the batteries have a bending structure, the bending structure including a connecting portion and a bending portion, the bending portion connecting the battery and the connecting portion, the extending direction of the connecting portion having a first angle with the first direction, the first angle being in the range of [0°, 70°];

[0008] In two adjacent batteries, the connection portion of the first electrical connector of one battery is connected to the electrical connector of the other battery.

[0009] As an optional implementation, the bending portion includes a first bending portion and a first crease portion, a first end of the first bending portion is connected to the battery, a second end of the first bending portion is connected to the first end of the first crease portion, and a second end of the first crease portion is connected to the connecting portion.

[0010] Along the thickness direction of the first bend, the first bend and the connecting portion are partially stacked.

[0011] As an optional implementation, the first bending portion includes a first sub-bending portion, a second crease portion, and a second sub-bending portion connected in sequence.

[0012] The end of the first sub-bent portion that is away from the second crease portion is connected to the battery, and the second sub-bent portion is connected to the connecting portion through the first crease portion;

[0013] Along the thickness direction of the first sub-bend, the orthographic projections of the first sub-bend, the second sub-bend, and the connecting portion at least partially overlap.

[0014] As an optional implementation, along the thickness direction of the first sub-bend, a portion of the connecting portion is stacked between the first sub-bend and the second sub-bend; or

[0015] The connecting portion is located on the side of the second sub-bend that is away from the first sub-bend.

[0016] As an optional implementation, the connecting part and the battery are spaced apart.

[0017] As an optional implementation, the minimum distance between the connecting part and the battery is in the range of [0.1mm, 10mm].

[0018] As an optional implementation, it further includes an insulating member, the insulating member comprising a first insulating member having a first insulating portion located between the first sub-bend and the second sub-bend along the thickness direction of the first bend; and / or

[0019] The first insulating member includes a second insulating portion, which is located on the side of one of the connecting portion and the second sub-bend portion away from the other along the thickness direction of the first bend portion.

[0020] As an optional implementation, the electrical connector includes a second electrical connector;

[0021] In two adjacent batteries, the connection portion of the first electrical connector of one battery is connected to the second electrical connector of the other battery.

[0022] As an optional implementation, the first electrical connector and the second electrical connector of the battery have opposite polarities.

[0023] As an optional implementation, at least a portion of the second electrical connectors of the batteries have a folded structure;

[0024] In two adjacent batteries, the connecting portion of the first electrical connector of one battery is connected to the folded structure of the second electrical connector of the other battery.

[0025] As an optional implementation, the second electrical connector having the folded structure includes at least two connecting segments connected in sequence;

[0026] Along the thickness direction of the connecting segment, at least two connecting segments are stacked to form the folded structure;

[0027] In two adjacent batteries, the connection portion of one battery is connected to at least one connection segment of the other battery.

[0028] As an optional implementation, the first bent portion and the connecting portion are partially stacked, and the stacking direction of the first bent portion and the connecting portion is the same as the stacking direction of the at least two connecting segments.

[0029] As an optional implementation, the second electrical connector includes a first connecting segment, a second connecting segment, and a third connecting segment connected in sequence;

[0030] The first end of the first connecting segment is connected to the battery, the second end of the first connecting segment extends away from the battery and is connected to the first end of the second connecting segment, the second end of the second connecting segment extends towards the battery and is connected to the first end of the third connecting segment, and the second end of the third connecting segment extends away from the battery.

[0031] As an optional implementation, the connecting portion is disposed between the first connecting segment and the second connecting segment along the thickness direction of the first connecting segment, and / or, the connecting portion is disposed between the second connecting segment and the third connecting segment.

[0032] As an optional implementation, an insulating element is also included, said insulating element comprising a second insulating element, the second insulating element comprising:

[0033] A third insulating portion, along the thickness direction of the connecting segment, is located between the first connecting segment and the second connecting segment; and / or

[0034] The fourth insulating part is located on the side of the third connecting segment away from the second connecting segment, along the thickness direction of the connecting segment.

[0035] As an optional implementation, the battery has a first sealing edge and a second sealing edge at its end, the second sealing edge protruding from the first sealing edge, and the first sealing edge and the second sealing edge forming a receiving groove;

[0036] The battery module is provided with a protective component, at least a portion of which is located within the receiving slot.

[0037] As an optional implementation, the protection component includes a protector;

[0038] The protector is connected to the battery and is disposed within the receiving slot.

[0039] As an optional implementation, the protector is provided with a first connector and a second connector;

[0040] In two adjacent batteries, the first connector is connected to the bent structure of the first electrical connector of one battery; the second connector is connected to the second electrical connector of the other battery.

[0041] As an optional implementation, the protection component includes a first protective element;

[0042] The first protective member is disposed in the receiving groove, with the first surface of the first protective member along the thickness direction facing the inner wall of the receiving groove, and the second surface of the first protective member along the thickness direction facing the protector.

[0043] As an optional implementation, the protection component includes a second protective member, which has a protective cavity.

[0044] At least a portion of the protector is disposed within the protective cavity;

[0045] And / or, at least a portion of at least one of the first electrical connector and the second electrical connector is disposed within the protective cavity.

[0046] Secondly, this application provides a battery pack, including any of the above-mentioned battery modules.

[0047] Thirdly, this application provides an electrical device including any of the above-mentioned battery modules or battery packs.

[0048] The battery module, battery pack, and electrical device provided in this application embodiment include a battery module comprising multiple batteries, at least some of which are arranged along a first direction. Each battery is provided with an electrical connector, including a first electrical connector. At least a portion of the first electrical connectors of the batteries have a bent structure, comprising a connecting portion and a bent portion. The bent portion connects the battery and the connecting portion, and the extension direction of the connecting portion forms an angle with the first direction, the angle ranging from [0° to 70°]. In two adjacent batteries, the connecting portion of the first electrical connector of one battery is connected to the electrical connector of the other battery. By providing a bent portion and a connecting portion in the first electrical connector of the battery, the original extension direction of the first electrical connector is changed, allowing the connecting portion of the first electrical connector to directly connect to the electrical connector of the adjacent battery. This connection method eliminates the need to weld the electrical connector to additional connecting components; simply bending the first electrical connector and connecting it to the electrical connector of the adjacent battery facilitates series and parallel connection between batteries, simplifying the battery series and parallel manufacturing process and improving battery production efficiency. Attached Figure Description

[0049] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with this application and, together with the description, serve to explain the principles of this application.

[0050] Figure 1 A schematic diagram of the connection structure between the first battery and the second battery in the battery module provided in the embodiments of this application;

[0051] Figure 2 for Figure 1 A schematic diagram of the structure of the first and second batteries from another perspective;

[0052] Figure 3 for Figure 1 A schematic diagram of the bending structure of the first electrical connector of the first battery and the connection structure of the second electrical connector of the second battery;

[0053] Figure 4 for Figure 1 A schematic diagram of the bending structure of the first electrical connector of the first battery and another connection structure of the second electrical connector of the second battery;

[0054] Figure 5 for Figure 2 Enlarged section A Figure 1 ;

[0055] Figure 6 for Figure 2 Enlarged section A Figure 2 ;

[0056] Figure 7 This is a schematic diagram of the battery structure in the battery module provided in the embodiments of this application;

[0057] Figure 8 A schematic diagram of the connection structure of the first and second batteries with insulating components;

[0058] Figure 9 for Figure 8 A schematic diagram of the connection structure between the first and second batteries from another perspective;

[0059] Figure 10 for Figure 2 A schematic diagram of the structure of the battery with a protector and a first protective component;

[0060] Figure 11 for Figure 10 A schematic diagram of the battery structure from another perspective;

[0061] Figure 12 for Figure 2 A schematic diagram of the structure of the battery with a second protective component.

[0062] Explanation of reference numerals in the attached figures:

[0063] 10-Battery; 101-First sealing edge; 102-Second sealing edge; 103-Third sealing edge; 104-Receiving groove; 105-Electrical tab film;

[0064] 11-First Battery;

[0065] 12 - Second battery;

[0066] 100 - First electrical connection;

[0067] 110 - Bending structure; 111 - Connecting part; 112 - Bending part; 1121 - First bending part; 1121a - First sub-bending part; 1121b - Second crease part; 1121c - Second sub-bending part; 1122 - First crease part;

[0068] 200 - Second electrical connection;

[0069] 210 - Folded structure; 211 - First connecting segment; 212 - Second connecting segment; 213 - Third connecting segment;

[0070] 300 - Insulating parts;

[0071] 310 - First insulating element; 311 - First insulating part; 312 - Second insulating part;

[0072] 320 - Second insulating component; 321 - Third insulating part; 322 - Fourth insulating part;

[0073] 400-protector;

[0074] 410 - First connector; 411 - Electrical connection; 412 - Sampling unit;

[0075] 420 - Second connector;

[0076] 500 - First protective component;

[0077] 600 - Second protective component;

[0078] 610 - Protective cavity.

[0079] The accompanying drawings illustrate specific embodiments of this application, which will be described in more detail below. These drawings and descriptions are not intended to limit the scope of the concept in any way, but rather to illustrate the concept of this application to those skilled in the art through reference to particular embodiments. Detailed Implementation

[0080] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the embodiments of this application.

[0081] In the embodiments of this application, the terms "upper," "lower," "inner," "middle," "outer," "front," and "rear," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. These terms are mainly for better describing the embodiments of this application and their implementations, and are not intended to limit the indicated device, element, or component to having a specific orientation, or to be constructed and operated in a specific orientation. Furthermore, some of the above terms may be used to indicate other meanings besides orientation or positional relationship; for example, the term "upper" may also be used in some cases to indicate a certain dependency or connection relationship. For those skilled in the art, the specific meaning of these terms in the embodiments of this application can be understood according to the specific circumstances.

[0082] Furthermore, the terms "set up," "connect," and "fix" should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral structure; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, or it can be an internal connection between two devices, components, or parts. Those skilled in the art can understand the specific meaning of the above terms in the embodiments of this disclosure according to the specific circumstances.

[0083] The terms "first," "second," "third," "fourth," etc. (if present) in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that embodiments of the present application described herein can be implemented, for example, in orders other than those illustrated or described herein.

[0084] In this application, the terms "exemplarily" or "for example" are used to indicate examples, illustrations, or descriptions. Any embodiment or design described as "exemplarily" or "for example" in this application should not be construed as being more preferred or advantageous than other embodiments or designs. Specifically, the use of terms such as "exemplarily" or "for example" is intended to present the relevant concepts in a specific manner.

[0085] As is known from the background technology, the current transmission between batteries in a battery pack needs to be accomplished by connecting components, such as connecting plates or circuit boards.

[0086] However, when circuit boards are used as connecting components between batteries, they not only occupy the limited space of the battery module, but also increase the current density on the circuit board, making the thermal management of the battery pack more difficult and affecting the performance and efficiency of the battery pack.

[0087] When using connectors as the connecting components between batteries, the connectors are first soldered to the battery tabs, and then soldered to the circuit board. This allows for series and parallel connection of batteries, which can, to some extent, solve the space occupation and thermal management problems caused by directly connecting batteries to the circuit board. However, connectors are expensive, and the connection process between the connectors and the battery tabs is complex, which is not conducive to the mass production and cost control of battery packs.

[0088] In view of the above, this application provides a battery module, a battery pack, and an electrical device, wherein the battery module includes a plurality of batteries, at least some of which are arranged along a first direction; the batteries are provided with electrical connectors, the electrical connectors including first electrical connectors; the first electrical connectors of at least a portion of the batteries have a bending structure, the bending structure including a connecting portion and a bending portion, the bending portion connecting the battery and the connecting portion, the extension direction of the connecting portion having an angle with the first direction, the angle being in the range of [0°, 70°]; in two adjacent batteries, the connecting portion of the first electrical connector of one battery is connected to the electrical connector of the other battery.

[0089] By incorporating a bending portion and a connecting portion on the first electrical connector, the original extension direction of the first electrical connector is altered, allowing the connecting portion of the first electrical connector to directly connect with the electrical connectors of adjacent batteries. This connection method eliminates the need to weld the battery's electrical connectors to additional circuit boards or connecting pieces; simply bending the first electrical connector facilitates series and parallel connections between batteries, simplifying the manufacturing process for series and parallel battery connections. It also eliminates reliance on connecting components, saving on their usage and thus reducing production costs. Batteries no longer need to be welded to circuit boards for series and parallel connections, which helps reduce current density and loop resistance, improves the thermal management performance of the battery pack, and enhances overall performance and efficiency. Furthermore, it reduces the use of circuit boards in the battery module, saving space occupied by circuit boards and contributing to a more compact battery module.

[0090] The technical solution of this application will be described in detail below with reference to the accompanying drawings and specific embodiments. The following specific embodiments can be combined with each other, and the same or similar concepts or processes may not be described again in some embodiments.

[0091] Understandably, by connecting multiple batteries in series and parallel within a battery module, voltage or capacity can be increased to meet different power demands. Battery 10 comes in various shapes, including square, cylindrical, and plate-like. Taking a square battery as an example, it is further divided into square stacked batteries and square wound batteries. Square batteries are packaged in two types: hard-pack and soft-pack. Hard-pack batteries typically use steel or aluminum casings, while soft-pack batteries usually use aluminum-plastic film casings.

[0092] Taking a pouch-shaped square battery as an example, when packaging the battery 10, the battery 10 can be placed in the center of the aluminum-plastic film first, and then the aluminum-plastic film can be heat-sealed using a heat-sealing device.

[0093] The heat sealing process forms a first sealing edge 101 at one or both ends of the battery 10 along its length. The first sealing edge 101 is provided with a second sealing edge 102 protruding from the first sealing edge 101. The second sealing edge 102 helps to enhance the sealing performance of the seal and prevent electrolyte leakage and external moisture and oxygen from entering the battery 10.

[0094] The heat sealing process also forms a third sealing edge 103 on both sides of the battery 10 in the width direction. The third sealing edge 103 can increase the rigidity and strength of the edge of the battery 10 and prevent deformation or damage due to external force during assembly or use.

[0095] The third sealing edge portion 103 located on both sides of the battery 10 can be configured in a bent form, which reduces the overall volume of the battery 10 and improves the strength of the side of the battery 10. Furthermore, in order to maintain the consistency and stability of the process and reduce the internal stress or deformation caused by structural asymmetry, the bending direction of the third sealing edge portion 103 on both sides of the battery 10 can be consistent, that is, bending towards one of the larger surfaces of the battery 10.

[0096] Battery 10 typically includes a positive and a negative electrode. Taking a pouch battery as an example, a pouch battery usually has a positive tab and a negative tab as the positive and negative electrodes of battery 10. Of course, battery 10 can also have multiple positive and / or multiple negative electrodes to improve the energy extraction efficiency of battery 10. Taking this application as an example, the first electrical connector and the second electrical connector can serve as the positive and negative electrodes of battery 10, respectively, acting as the energy extraction interface between battery 10 and external circuitry, thus enabling the charging and discharging function of battery 10.

[0097] Taking a pouch battery as an example, the electrical connector is usually located at one or both ends of the battery 10 along its length and extends from the second sealing edge 102 at the end of the battery 10. The position of the electrical connector needs to match the second sealing edge 102 so that the electrical connector will not be damaged or the sealing performance at the sealing edge will be affected during the packaging process.

[0098] When the battery 10 is a pouch battery, the end of the electrical connector located outside the casing that is connected to the battery 10 can be covered with a tab film 105. The tab film 105 is mainly made of insulating material, which can provide insulation protection for the electrical connector to prevent chemical reaction between the electrical connector and the metal layer of the aluminum-plastic film at the sealing edge, thereby avoiding potential safety hazards to the battery.

[0099] Combination Figure 1 and Figure 2 As shown, a first aspect of this application provides a battery module including a plurality of batteries 10, at least some of which are arranged along a first direction X; each battery 10 is provided with an electrical connector, the electrical connector including a first electrical connector 100; at least a portion of the first electrical connectors 100 of the batteries 10 have a bending structure 110, the bending structure 110 including a connecting portion 111 and a bending portion 112, the bending portion 112 connecting the battery 10 and the connecting portion 111, the extending direction of the connecting portion 111 having an angle α with the first direction X; in two adjacent batteries 10, the connecting portion 111 of the first electrical connector 100 of one battery 10 is connected to the electrical connector of the other battery 10.

[0100] Specifically, the included angle α ranges from [0° to 70°]. In two adjacent batteries 10, the first electrical connector 100 of one battery 10 can be bent to form a connecting portion 111 that can extend along the first direction X to the electrical connector of the other battery 10. Thus, when two adjacent batteries 10 are arranged along the first direction X, the electrical connectors of the two batteries 10 can be directly connected, which can solve the problem of complex connections between batteries 10 when they are arranged along the first direction X.

[0101] Compared to traditional designs where the connection between batteries 10 requires a connecting structure, this embodiment of the application, by providing a bending portion 112 and a connecting portion 111 on the first electrical connector 100 of the battery, changes the original extension direction of the first electrical connector 100. This allows the connecting portion 111 of the first electrical connector 100 to be directly connected to the electrical connectors of adjacent batteries 10 without welding the electrical connector to additional connecting components. Simply bending the first electrical connector 100 facilitates the series and parallel connection between batteries 10, simplifying the manufacturing process of series and parallel connection of batteries 10. It also reduces reliance on connecting components, saves on the use of connecting components, and reduces production costs. Since the batteries 10 no longer need to be welded to the circuit board to achieve series and parallel connection, it helps to reduce current density and loop resistance, improve the thermal management performance of the battery module, and enhance overall performance and efficiency. It also reduces the use of circuit boards in the battery module, saving the space occupied by the circuit board in the battery module and helping to improve the compactness of the battery module.

[0102] Taking a square battery 10 as an example, the battery 10 has a length direction, a width direction, and a thickness direction.

[0103] For example, in combination Figure 1 As shown, the width direction of the battery 10 is the first direction X; the length direction of the battery 10 is the second direction Y, and the electrical connector can be set at one end of the battery 10 along the second direction Y; the thickness direction of the battery is the third direction Z.

[0104] Of course, the arrangement direction of the battery 10 and the location of the electrical connectors can be flexibly set according to actual needs. For example, the arrangement direction of the battery 10 can also be Y-axis, Z-axis, XY-axis, XZ-axis or YZ-axis; the electrical connectors can also be set on one or both sides of the battery 10 along the first direction X, or on one or both sides of the battery 10 along the third direction Z.

[0105] In the battery module, refer to Figure 3Two adjacent batteries 10 arranged along the first direction X can be a first battery 11 and a second battery 12. The first electrical connector 100 of the first battery 11 has a bending structure 110. The bending structure 110 includes a connecting part 111 and a bending part 112. The bending part 112 connects the battery 10 and the connecting part 111.

[0106] Specifically, Figure 3 The connecting portion 111, shown by the solid line, is parallel to the first direction X, meaning the angle α between the extending direction of the connecting portion 111 and the first direction X is 0°. In this state, the connecting portion 111 of the first battery 11 can be connected to the electrical connector of the second battery 12 via the shortest path, facilitating a direct connection between the first battery 11 and the second battery 12 while also saving the total length of the first electrical connector 100.

[0107] Figure 3 The connecting portion 111 shown by the dashed line represents another state of the connecting portion 111, in which the angle α between the connecting portion 111 and the first direction X can be 70°. In this state, the extension direction of the connecting portion 111 can better accommodate the situation where the lengths of the first battery 11 and the second battery 12 are inconsistent along the second direction Y, so that the connecting portion 111 of the first battery 11 can extend accurately to the electrical connector of the second battery 12, thereby realizing a direct connection between the first battery 11 and the second battery 12.

[0108] Specifically, the first electrical connector 100 of the first battery 11 is provided with a bending portion 112 and a connecting portion 111, so that the connecting portion 111 can extend directly to the electrical connector of the second battery 12 and can be directly connected to the electrical connector of the second battery 12.

[0109] Combination Figure 3 As shown, in some embodiments, the bending portion 112 includes a first bending portion 1121 and a first crease portion 1122. The first end of the first bending portion 1121 is connected to the battery 10, the second end of the first bending portion 1121 is connected to the first end of the first crease portion 1122, and the second end of the first crease portion 1122 is connected to the connecting portion 111. Along the thickness direction of the first bending portion 1121, the first bending portion 1121 and the connecting portion 111 are partially stacked.

[0110] By providing a first bending portion 1121 and a first crease portion 1122 at the bending portion 112, with the first crease portion 1122 connecting the first bending portion 1121 and the connecting portion 111, the original extension direction of the first electrical connector 100 is changed. This allows the first electrical connector 100 to extend from the end face of the battery 10 to the side of the battery 10, extending to the electrical connector of the second battery 12 away from the edge of the first battery 11. By welding the connecting portion 111 and the electrical connector of the second battery 12, the connection between the first electrical connector 100 of the first battery 11 and the electrical connector of the second battery 12 can be achieved, thus realizing a direct connection between the first battery 11 and the second battery 12. This connection method improves the convenience of connecting the first battery 11 and the second battery 12. The first electrical connector 100 can be a one-piece structure.

[0111] In a specific implementation, the first electrical connector 100 of the battery 10 can be folded to form a first bending portion 1121 and a connecting portion 111, and a first crease portion 1122 can be formed between the first bending portion 1121 and the connecting portion 111.

[0112] The first bent portion 1121 and the connecting portion 111 formed after folding are partially stacked, and the two can be in close contact, partially in close contact, or not in contact at all.

[0113] It should be noted that the first electrical connector may also include only the bent portion 112 and the connecting portion 111, with the connecting portion 111 connected to one side of the bent portion 112. In this case, the first electrical connector 100 may be an integral part or a separate part. The first electrical connector 100 does not need to be folded, and the beneficial effects of this application can still be achieved. Therefore, the formation of the connecting portion 111 and the bent portion 112 is not specifically limited in this application.

[0114] This method, which involves folding the first electrical connector 100 of one battery 10 to change its extension direction and connect it to the electrical connector of another battery 10, can conveniently realize the series and parallel connection between batteries 10, improve the flexibility of the connection between batteries 10, and can adapt to different arrangement and space constraints of batteries 10 in the battery module.

[0115] It should be noted that when the third sealing portion 103 is provided on the side of the first battery 11 near the second battery 12 and / or on the side of the second battery 12 near the first battery 11, the third sealing portion 103 can be bent in the Z direction towards the third party.

[0116] When the first electrical connector 100 of the first battery 11 is folded, the folding direction is preferably away from the third direction Z, so as to prevent the third sealing edge 103 of the first battery 11 and / or the second battery 12 from interfering with the connection part 111 when the folded connection part 111 crosses the junction of the first battery 11 and the second battery 12.

[0117] Combination Figure 4 As shown, in some embodiments, the first bending portion 1121 includes a first sub-bending portion 1121a, a second crease portion 1121b, and a second sub-bending portion 1121c connected in sequence; one end of the first sub-bending portion 1121a away from the second crease portion 1121b is connected to the battery 10, and one end of the second sub-bending portion 1121c away from the second crease portion 1121b is connected to the first crease portion 1122; along the thickness direction of the first sub-bending portion 1121a, the orthographic projections of the first sub-bending portion 1121a, the second sub-bending portion 1121c, and the connecting portion 111 at least partially overlap.

[0118] By providing a first sub-bending portion 1121a, a second crease portion 1121b, and a second sub-bending portion 1121c connected in sequence in the first bending portion 1121, and ensuring that the orthographic projections of the first sub-bending portion 1121a, the second sub-bending portion 1121c, and the connecting portion 111 at least partially overlap, the first electrical connector 100 can be further folded, reducing the length of the first bending portion 1121 extending out of the battery 10, thus not occupying too much installation space and facilitating a compact design of the battery module.

[0119] In a specific implementation, the first bending portion 1121 can be folded toward the battery 10, so that the first bending portion 1121 forms a first sub-bending portion 1121a, a second crease portion 1121b, and a second sub-bending portion 1121c.

[0120] The second sub-bending portion 1121c is triangular in shape. The first end of the second sub-bending portion 1121c is straight and connected to the second crease portion 1121b. The second end of the second sub-bending portion 1121c is a point, which is located close to the battery 10 relative to the first end of the second sub-bending portion 1121c.

[0121] The first crease portion 1122 serves as a transition portion between the second sub-bend portion 1121c and the connecting portion 111. The first crease portion 1122 is straight and is inclined relative to the first direction X.

[0122] Understandably, the third sealing edge 103 is bent toward the third direction Z. When folding the first bend 1121 to form the first sub-bend 1121a, the second crease 1121b, and the second sub-bend 1121c, the folding direction can be away from the third direction Z to prevent the third sealing edge 103 of the first battery 11 and / or the second battery 12 from interfering with the connecting part 111 when the connecting part 111 crosses the junction of the first battery 11 and the second battery 12.

[0123] It should be noted that the bending portion may also include only the first bending portion 1121 and the first crease portion 1122. The first crease portion 1122 is connected between the first bending portion 1121 and the connecting portion 111. By controlling the length of the first bending portion 1121, the connecting portion 111 can be positioned as close as possible to the battery 10. In this case, it is not necessary to fold the first bending portion 1121 again, and the beneficial effects of this application can still be achieved. Therefore, the specific structure of the first bending portion 1121 is not specifically limited in this application.

[0124] Combination Figure 4 As shown, in some embodiments, along the thickness direction of the first sub-bending portion 1121a, a portion of the connecting portion 111 is stacked between the first sub-bending portion 1121a and the second sub-bending portion 1121c.

[0125] By arranging the first sub-bending portion 1121a, the connecting portion 111, and the second sub-bending portion 1121c to be stacked sequentially along the thickness direction of the first sub-bending portion 1121a, the compactness of the first electrical connector 100 can be improved and the space occupied can be reduced. Furthermore, this stacking arrangement also helps to increase the mechanical strength of the first electrical connector 100 and reduce the risk of damage to the first electrical connector 100 due to vibration or other mechanical stress during use.

[0126] In a specific implementation, when the first electrical connector 100 is folded to form the connecting portion 111 and the bending portion 112, the first electrical connector 100 can be folded away from the third direction Z; when the first bending portion 1121 is folded to form the first sub-bending portion 1121a and the second sub-bending portion 1121c, the first bending portion 1121 is also folded away from the third direction Z, so that the connecting portion 111 is located between the first sub-bending portion 1121a and the second sub-bending portion 1121c.

[0127] Understandably, during the two folding processes of the first electrical connector 100, the folding direction is opposite to the third direction Z, which can effectively avoid interference between the third sealing edge 103 of the battery 10 and the connector 111.

[0128] In other embodiments, along the thickness direction of the first sub-bending portion 1121a, a portion of the connecting portion 111 is stacked on the side of the second sub-bending portion 1121c opposite to the first sub-bending portion 1121a.

[0129] By arranging the first sub-bending portion 1121a, the second sub-bending portion 1121c, and the connecting portion 111 to be stacked sequentially along the thickness direction of the first sub-bending portion 1121a, the compactness of the first electrical connector 100 can be improved and the space occupied can be reduced; and this stacking arrangement also helps to increase the mechanical strength of the first electrical connector 100 and reduce the risk of damage caused by vibration or other mechanical stress during use.

[0130] In a specific implementation, when the first electrical connector 100 is folded to form the connecting portion 111 and the bending portion 112, the folding direction of the first electrical connector 100 can be oriented towards the third direction Z; when the first bending portion 1121 is folded to form the first sub-bending portion 1121a and the second sub-bending portion 1121c, the folding direction of the first bending portion 1121 can be folded away from the third direction Z, so that the connecting portion 111 is located on the side of the second sub-bending portion 1121c away from the first sub-bending portion 1121a.

[0131] It should be noted that the connecting part 111 can be directly disposed on one side of the second sub-bending part 1121c. The connecting part 111 and the second sub-bending part 1121c can be an integral part or separate parts. In this case, the first electrical connector 100 only needs to be folded once, which can also achieve the technical effect of reducing space occupation. Therefore, the number of times the first electrical connector 100 is folded is not specifically limited in this application.

[0132] Understandably, during the two folding processes of the first electrical connector 100, as long as the folding direction of the first bending portion 1121 is opposite to the third direction Z, interference between the third sealing portion 103 of the battery 10 and the connector 111 can be avoided.

[0133] Combination Figure 3 As shown, in some embodiments, the extension direction of the first bending portion 1121 and the extension direction of the connecting portion 111 have an angle β, the angle β can be greater than or equal to 20° and less than or equal to 160°.

[0134] Understandably, given a fixed lead-out position and extension direction of the first electrical connector 100 of the first battery 11, if the arrangement directions of the first battery 11 and the second battery 12 are different, then the angle β between the extension direction of the connecting portion 111 and the extension direction of the first bent portion 1121 formed after folding the first electrical connector 100 will also be different. By setting the angle β between the extension direction of the first bent portion 1121 and the extension direction of the connecting portion 111 to be greater than or equal to 20° and less than or equal to 160°, various arrangements of the battery 10 can be adapted, enabling convenient connection between the electrical connectors of the battery 10 under different arrangements.

[0135] Taking a square battery 10 as an example, the first battery 11 and the second battery 12 are arranged along the first direction X, and the first electrical connector 100 of the first battery 11 and the electrical connector of the second battery 12 are both led out from the same end of the battery 10 along the second direction Y. The angle between the extension direction of the first bending portion 1121 and the extension direction of the connecting portion 111 can be 90°. At this time, the connecting portion 111 of the first battery 11 can be connected to the electrical connector of the second battery 12 with the shortest path. While realizing the direct connection between the first battery 11 and the second battery 12, the total length of the first electrical connector 100 can also be saved.

[0136] First battery 11 and second battery 12 along Figure 1 When the XY direction is arranged, the angle β between the extension direction of the first bending part 1121 and the extension direction of the connecting part 111 can be adaptively changed so that the connecting part 111 of the first battery 11 can extend accurately to the electrical connector of the second battery 12, so as to realize the direct connection between the first battery 11 and the second battery 12.

[0137] When the first battery 11 and the second battery 12 are arranged along the first direction X, but the lengths of the first battery 11 and the second battery 12 along the second direction Y are not the same, the angle β between the extension direction of the first bending portion 1121 and the extension direction of the connecting portion 111 can also be adaptively changed so that the connecting portion 111 of the first battery 11 can extend accurately to the electrical connector of the second battery 12, so as to realize the direct connection between the first battery 11 and the second battery 12.

[0138] In some embodiments, the connector 111 and the battery 10 are spaced apart.

[0139] By spacing the connector 111 and the battery 10 apart, direct contact between the connector 111 and the aluminum-plastic film on the surface of the battery 10 can be avoided, thus preventing scratches on the aluminum-plastic film. Furthermore, the gap between the connector 111 and the battery 10 helps reduce heat conduction from the connector 111 to the battery 10, thereby helping to control the temperature of the battery 10 and improve the overall thermal stability of the battery module.

[0140] Specifically, the connecting part 111 and the first sealing edge part 101 of the battery 10 are spaced apart to avoid scratches on the aluminum-plastic film caused by contact between the connecting part 111 and the first sealing edge part 101.

[0141] For example, the minimum distance between the connector 111 and the battery 10 ranges from [0.1 mm to 10 mm].

[0142] By controlling the minimum distance between the connector 111 and the battery 10, the connector 111 can be made as close to the battery 10 as possible to avoid occupying too much space, but without making the connector 111 contact the battery 10. That is, the connector 111 is prevented from directly contacting the surface of the battery 10, especially the aluminum-plastic film at the first sealing edge 101, so as not to cause scratches on the aluminum-plastic film.

[0143] It should be noted that the connecting part 111 and the battery 10 can also be in contact, as long as the connecting part 111 does not scratch the aluminum-plastic film on the surface of the battery 10. For example, the beneficial effects of this application can be achieved by setting an insulating part 300 between the connecting part 111 and the battery 10.

[0144] Combination Figure 8 and Figure 9 As shown, in some embodiments, an insulating member 300 is also included. The insulating member 300 includes a first insulating member 310, which includes: a first insulating portion 311 located between a first sub-bent portion 1121a and a second sub-bent portion 1121c along the thickness direction of the first bent portion 1121; and / or a second insulating portion 312 located on the side of one of the connecting portion 111 and the second sub-bent portion 1121c away from the other along the thickness direction of the first bent portion 1121.

[0145] By providing a first insulating portion 311 between the first sub-bend portion 1121a and the second sub-bend portion 1121c, the first insulating portion 311 can provide effective electrical isolation, preventing other conductive structures in the battery module from accidentally contacting the second sub-bend portion 1121c and causing a short circuit or electrical failure due to environmental factors; in addition, the first insulating portion 311 can also isolate the second sub-bend portion 1121c from the first sealing edge portion 101 of the battery 10, avoiding direct contact between the second sub-bend portion 1121c and the aluminum-plastic film at the first sealing edge portion 101 and scratching the aluminum-plastic film.

[0146] Specifically, when the connecting portion 111 is located on the side of the second sub-bending portion 1121c away from the first sub-bending portion 1121a, the second insulating portion 312 is located on the side of the connecting portion 111 away from the second sub-bending portion 1121c; when the connecting portion 111 is located between the first sub-bending portion 1121a and the second sub-bending portion 1121c, the second insulating portion 312 is located on the side of the second sub-bending portion 1121c away from the connecting portion 111.

[0147] The second insulating part 312 can provide effective electrical isolation to prevent other conductive structures in the battery module from accidentally contacting the connection part 111 and causing a short circuit or electrical failure due to environmental factors; in addition, the second insulating part 312 can also isolate the connection part 111 and the first sealing edge 101 of the battery 10, so as to prevent the connection part 111 from directly contacting the aluminum-plastic film at the first sealing edge 101 and scratching the aluminum-plastic film.

[0148] The first insulating part 311 and the second insulating part 312 are connected to each other.

[0149] Specifically, the end of the first insulating part 311 near the battery 10 and the end of the second insulating part 312 near the battery 10 are connected to each other. The insulating member 300 can cover the connection between the second sub-bent part 1121c and the connecting part 111, which helps to prevent the second sub-bent part 1121c and the connecting part 111 from directly contacting the surface of the battery 10 and causing scratches or damage to the aluminum-plastic film.

[0150] For example, the insulating element 300 can be insulating paper, which is an electrical insulating paper with excellent insulation properties and mechanical strength.

[0151] It should be noted that an insulating cover can be provided on the outside of the second sub-bend 1121c and the connecting portion 111. Regardless of the relative positions of the second sub-bend 1121c and the connecting portion 111, the insulating cover can provide electrical isolation between the two and prevent them from directly contacting the surface of the battery 10. Therefore, the form of the insulating member 300 is not limited in this application.

[0152] Combination Figure 5 and Figure 6 As shown, in some embodiments, the electrical connector includes a second electrical connector 200; in two adjacent batteries 10, the connection portion 111 of the first electrical connector 100 of one battery 10 is connected to the second electrical connector 200 of the other battery 10.

[0153] Specifically, the first electrical connector 100 of the first battery 11 can be directly connected to the second electrical connector 200 of the second battery 12 through its connecting portion 111, which facilitates current transmission between the first battery 11 and the second battery 12. This connection method reduces the need for additional connecting components and simplifies the design and manufacturing process of the battery module.

[0154] In some embodiments, the first electrical connector 100 and the second electrical connector 200 on the same battery 10 have opposite polarities.

[0155] By simultaneously providing a first electrical connector 100 and a second electrical connector 200 on the same battery 10, with opposite polarities, a bipolar connection of the battery 10 can be achieved, ensuring that the positive and negative terminals of the battery 10 can be effectively connected to adjacent batteries 10 or external circuits.

[0156] For example, the first electrical connector 100 can be connected to the positive terminal of the battery 10 to connect with other components as the positive terminal of the battery 10; correspondingly, the second electrical connector 200 is connected to the negative terminal of the battery 10 to connect with other components as the negative terminal of the battery 10.

[0157] The first electrical connector 100 can also be connected to the negative terminal of the battery 10, and correspondingly, the second electrical connector 200 can also be connected to the positive terminal of the battery 10.

[0158] In the adjacent first battery 11 and second battery 12, the first electrical connector 100 of the first battery 11 is connected to the second electrical connector 200 of the second battery 12.

[0159] Wherein, when the polarities of the first electrical connector 100 of the first battery 11 and the second electrical connector 200 of the second battery 12 are opposite, the first battery 11 and the second battery 12 are connected in series; when the polarities of the first electrical connector 100 of the first battery 11 and the second electrical connector 200 of the second battery 12 are the same, the first battery 11 and the second battery 12 are connected in parallel.

[0160] For example, in the same battery 10, the first electrical connector 100 and the second electrical connector 200 can be disposed on one side of the battery 10 along the second direction Y, and the first electrical connector 100 and the second electrical connector 200 can be distributed at intervals along the first direction X.

[0161] Combination Figure 5 and Figure 6 As shown, in some embodiments, at least a portion of the second electrical connectors 200 of the batteries 10 have a folded structure 210; in two adjacent batteries 10, the connecting portion 111 of the first electrical connector 100 of one battery 10 is connected to the folded structure 210 of the second electrical connector 200 of the other battery 10.

[0162] Some portions of the second electrical connector 200 are folded to form a folded structure 210. The folded structure 210 can increase the mechanical strength of the second electrical connector 200, making the connection 111 of the first electrical connector 100 of one battery 10 and the second electrical connector 200 of the other battery 10 stable and reliable, which helps to reduce the risk of damage caused by vibration or other mechanical stress.

[0163] Specifically, the second electrical connector 200 having the folded structure 210 includes at least two connecting segments connected in sequence; the at least two connecting segments are stacked along the thickness direction of the connecting segments to form the folded structure 210; in two adjacent batteries 10, the connecting portion 111 of one battery 10 is connected to at least one connecting segment of the other battery 10.

[0164] When connected to the connecting part 111, the stacked connecting segments can provide a larger connecting surface to connect with the connecting part 111, ensuring an effective welding area, thereby ensuring the stability and conductivity of the connection between the first electrical connector 100 of the first battery 11 and the second electrical connector 200 of the second battery 12.

[0165] Furthermore, the stacked arrangement of the connecting segments helps to reduce the length of the second electrical connector 200 extending out of the battery 10, reduces the space occupied by the second electrical connector 200, and helps to improve the compactness of the battery module layout.

[0166] In addition, the multi-layered connection segment stacking can provide better mechanical strength, enhance the mechanical stability between the first electrical connector 100 of the first battery 11 and the second electrical connector 200 of the second battery 12, better resist mechanical stress and vibration, and improve the durability of the battery module.

[0167] It should be noted that the second electrical connector 200 with the folding structure 210 may only have one connecting segment. In two adjacent batteries 10, the connecting part 111 of the first battery 11 is connected to the connecting segment of the second battery 12. By controlling the length of the connecting segment, the space occupied by the second electrical connector 200 can be reduced, and the layout compactness of the battery module can be improved. Therefore, the number of connecting segments of the second electrical connector 200 is not specifically limited in this application.

[0168] In some embodiments, the first bending portion 1121 and the connecting portion 111 are partially stacked, and the stacking direction of the first bending portion 1121 and the connecting portion 111 is the same as the stacking direction of at least two connecting segments.

[0169] It is understandable that the stacking direction of the bending structure 110 is the same as that of the folding structure 210. When the connecting part 111 of the bending structure 110 of the first battery 11 is connected to the connecting section of the second battery 12, the connecting part 111 can better achieve the fit between the connecting part 111 and the connecting section, which can provide better electrical contact, reduce contact resistance, and thus improve current transmission efficiency.

[0170] It should be noted that the stacking direction of the first bent portion 1121 and the connecting portion 111 may be different from the stacking direction of the at least two connecting segments. When the connecting portion 111 contacts the connecting segment, the connecting portion 111 is bent so that the connecting portion 111 and the connecting segment are attached together and welded. Therefore, the stacking direction of the bent structure 110 and the stacking direction of the folded structure 210 are not limited in this application.

[0171] Specifically, the second electrical connector 200 includes a first connecting segment 211, a second connecting segment 212, and a third connecting segment 213 connected in sequence; the first end of the first connecting segment 211 is connected to the battery 10, the second end of the first connecting segment 211 extends away from the battery 10 and is connected to the first end of the second connecting segment 212, the second end of the second connecting segment 212 extends towards the battery 10 and is connected to the first end of the third connecting segment 213, and the second end of the third connecting segment 213 extends away from the battery 10.

[0172] By providing a first connecting segment 211, a second connecting segment 212, and a third connecting segment 213 that are sequentially connected and stacked in the second electrical connector 200, the third connecting segment 213 can extend in a direction away from the battery 10, making it easier to connect with other conductive structures in the battery module; and, by extending the third connecting segment 213 in a direction away from the battery 10, it can be avoided that the third connecting segment 213 is laid on the surface of the battery 10 and comes into contact with the aluminum-plastic film on the surface of the battery 10, causing scratches.

[0173] The first connecting segment 211 allows current to be efficiently transferred from the battery 10 to the connecting segment, enabling the current to smoothly enter the folded structure 210. The second connecting segment 212 allows current to continue to be transferred from the first connecting segment 211, allowing the current to flow between different connecting segments. The third connecting segment 213 further extends the current path, allowing the current to continue to flow in the folded structure 210.

[0174] Specifically, along the thickness direction of the first connecting segment 211, the projection of the second connecting segment 212 can be located within the projection range of the first connecting segment 211, and at least part of the projection of the third connecting segment 213 can be within the projection range of the first connecting segment 211.

[0175] The second connecting segment 212 is located above the first connecting segment 211 and does not exceed the projection range of the first connecting segment 211, which can prevent the first connecting segment 211 from contacting the aluminum-plastic film on the surface of the battery 10 and scratching the aluminum-plastic film.

[0176] The third connecting segment 213 extends beyond the projection range of the first connecting segment 211 and extends away from the battery 10, which can also prevent the third connecting segment 213 from contacting the aluminum-plastic film on the surface of the battery 10 and scratching the aluminum-plastic film.

[0177] It should be noted that the second electrical connector 200 may only include the first connecting segment 211 and the second connecting segment 212 connected in sequence. In this case, the second electrical connector 200 may be an integral part or a separate part. As long as the length of the second electrical connector 200 is not greater than the length of the first connecting segment 211, the effect of avoiding scratching the aluminum-plastic film can also be achieved. Therefore, no specific restrictions are placed on the number of connecting segments and the formation method in this application.

[0178] Combination Figure 6 As shown, in some embodiments, the connecting portion 111 is disposed between the first connecting segment 211 and the second connecting segment 212 along the thickness direction of the first connecting segment 211.

[0179] The connecting part 111 is disposed between the first connecting segment 211 and the second connecting segment 212, so that the connecting part 111 can fit against the side of the second connecting segment 212 facing the first connecting segment 211. The good contact between the connecting part 111 and the side of the second connecting segment 212 facing the first connecting segment 211 helps to ensure an effective welding area, so as to effectively weld the connecting part 111 to the second connecting segment 212.

[0180] In a specific implementation, the connecting portion 111 of the first electrical connector 100 of the first battery 11 can be directly mounted on the surface of the second electrical connector 200 of the second battery 12. The second electrical connector 200 can be folded toward the battery 10 to form a first connecting segment 211 and a second connecting segment 212. The connecting portion 111 is located between the first connecting segment 211 and the second connecting segment 212. The connecting portion 111 and the second connecting segment 212 can be welded together.

[0181] The second end of the second connecting section 212 extends toward the second battery 12. When the length of the second connecting section 212 is long, it will overlap the surface of the second battery 12, which may scratch the surface of the second battery 12, especially the aluminum-plastic film at the first sealing edge 101.

[0182] The second connecting segment 212 can be folded away from the second battery 12 again to form the third connecting segment 213. The second end of the third connecting segment 213 extends away from the second battery 12, which can solve the problem that the second connecting segment 212 may scratch the aluminum-plastic film on the surface of the battery 10.

[0183] Furthermore, the end of the connecting portion 111 can be folded away from the first direction X to be disposed on the side of the second connecting segment 212 away from the first connecting segment 211, so that part of the connecting portion 111 is located between the first connecting segment 211 and the second connecting segment 212, and part of the connecting portion 111 is located between the second connecting segment 212 and the third connecting segment 213, thereby making the connection between the connecting portion 111 and the second electrical connector 200 more secure.

[0184] Combination Figure 5 As shown, along the thickness direction of the first connecting segment 211, the connecting part 111 may also be provided between the second connecting segment 212 and the third connecting segment 213.

[0185] The connecting part 111 is disposed between the second connecting segment 212 and the third connecting segment 213. The connecting part 111 can be attached to the side of the second connecting segment 212 that is away from the first connecting segment 211, or it can be attached to the side of the third connecting segment 213 that is facing the second connecting segment 212. This helps to ensure an effective welding area so that the connecting part 111 can be effectively welded to the second connecting segment 212 or the third connecting segment 213.

[0186] In practice, the second electrical connector 200 can be folded toward the second battery 12 to form the first connecting segment 211 and the second connecting segment 212. Then, the connecting part 111 of the first electrical connector 100 of the first battery 11 can be placed on the side of the second connecting segment 212 away from the first connecting segment 211, and the connecting part 111 can be welded to the second connecting segment 212.

[0187] The second end of the second connecting segment 212 extends toward the second battery 12. In order to avoid the second polar segment scratching the aluminum-plastic film on the surface of the battery 10, the second connecting segment 212 can be folded away from the second battery 12 again to form the third connecting segment 213. At this time, the third connecting segment 213 can be placed on the surface of the connecting part 111 away from the second connecting segment 212.

[0188] When the second connecting segment 212 is folded to form the second connecting segment 212 and the third connecting segment 213, the second connecting segment 212 and the third connecting segment 213 do not contact the battery 10 to avoid scratching the aluminum-plastic film on the surface of the battery 10; when the second connecting segment 212 and the third connecting segment 213 contact the battery 10, the surface of the second connecting segment 212 and the third connecting segment 213 needs to be provided with an insulating part 300 to isolate the second connecting segment 212 and the third connecting segment 213 from contact with the battery 10.

[0189] It should be noted that, along the thickness direction of the first connecting segment 211, the connecting part 111 can also be provided on the side of the third connecting segment 213 away from the second connecting segment 212. In this case, the connecting part 111 can be directly welded to the third connecting segment 213, which can also ensure an effective welding area. Therefore, the specific location of the connecting part 111 in the folding structure 210 is not specifically limited in this application.

[0190] In some embodiments, two adjacent batteries 10 include a first battery 11 and a second battery 12; a first electrical connector 100 of the first battery 11 has a bent structure 110 connected to a first end of the first battery 11 along the second direction Y; a second electrical connector 200 of the second battery 12 has a folded structure 210 connected to a first end of the second battery 12 along the second direction Y; in the second direction Y, the first end of the first battery 11 and the first end of the second battery 12 are located on the same side of the battery module.

[0191] With this configuration, when the first battery 11 and the second battery 12 are arranged along the first direction X, the electrical connectors of the first battery 11 and the second battery 12 are located on the same side of the battery module. Then, the connecting part 111 of the bending structure 110 of the first battery 11 can extend to the electrical connector of the second battery 12. The end of the connecting part 111 away from the bending part 112 can be directly attached to the folding structure 210 of the second battery 12, which facilitates the direct connection between the bending structure 110 and the folding structure 210.

[0192] It should be noted that, since the connecting part 111 of the first electrical connector 100 of the first battery 11 needs to be connected to the folding structure 210 of the second battery 12, the length of the first electrical connector 100 of the first battery 11 needs to be designed to be long enough.

[0193] Taking the example that both the first electrical connector 100 and the second electrical connector 200 are disposed at one end of the battery 10 along the second direction Y, in the first direction X, the distance between the first electrical connector 100 and the third sealing edge portion 103 located on one side of the battery 10 and the distance between the second electrical connector 200 and the third sealing edge portion 103 located on the other side of the battery 10 are equal; and in the first direction X, the width of the tab film 105 disposed on the surface of the first electrical connector 100 and the width of the tab film 105 disposed on the surface of the second electrical connector 200 are also equal.

[0194] Combination Figure 7 As shown, taking a 10-position square wound battery as an example, the length L of the first polarity element 110 can be: L≥a×2+b×2+c×2+d-e+m+n+f×2+k.

[0195] Where a is the radius of the rounded corner of the wound battery 10;

[0196] b is the distance between the side of the first electrical connector 100 near the second battery 12 and the side of the tab film 105 near the second battery 12 in the first direction X.

[0197] c is the width of the first electrical connector 100 in the first direction X;

[0198] d is the width of the second electrical connector 200 in the first direction X;

[0199] e represents the height at which the second sealing portion 102 protrudes from the first sealing portion 101 in the second direction Y.

[0200] m is the positional tolerance of the first electrical connector 100 in the first direction X;

[0201] n is the positional tolerance of the second electrical connector 200 in the first direction X;

[0202] f represents the thickness and gap of the third sealing portion 103 in the first direction X;

[0203] k is the distance between the first battery 11 and the second battery 12 in the first direction X.

[0204] When the battery is a 10-position square stacked battery, the tab film 105 disposed on the surface of the electrical connector in the first direction X can extend to the edge of the battery 10.

[0205] Therefore, the length L of the first electrical connector 100 of the square stacked battery can be: L≥b×2+c×2+d-e+m+n+f×2+k.

[0206] Where b is the distance between the side of the first electrical connector 100 near the second battery 12 and the side of the tab film 105 near the second battery 12 in the first direction X.

[0207] c is the width of the first electrical connector 100 in the first direction X;

[0208] d is the width of the second electrical connector 200 in the first direction X;

[0209] e represents the height at which the second sealing portion 102 protrudes from the first sealing portion 101 in the second direction Y.

[0210] m is the positional tolerance of the first electrical connector 100 in the first direction X;

[0211] n is the positional tolerance of the second electrical connector 200 in the first direction X;

[0212] f represents the thickness and gap of the third sealing portion 103 in the first direction X.

[0213] By controlling the length of the first electrical connector 100, it can be ensured that after the first electrical connector 100 is folded, it can extend to the edge of the second electrical connector 200 of the second battery 12 away from the first battery 11, ensuring the effective contact area between the connecting part 111 and the folding structure 210, thereby ensuring the welding effectiveness and realizing the stable connection between the first electrical connector 100 and the second electrical connector 200, thereby realizing the direct connection between the first battery 11 and the second battery 12.

[0214] This setup avoids the need for circuit boards or connectors to connect batteries 10 in series or parallel, saving on the number of circuit boards used in the battery module, thus reducing the space occupied by the circuit boards in the battery module, and also avoiding the high cost of using connectors.

[0215] The tab film 105 is made of a soft material. During the folding process of the first electrical connector 100, the tab film 105 can be folded together with the first electrical connector 100 to always cover the surface of the first electrical connector 100 and play a protective role for the first electrical connector 100.

[0216] In some embodiments, to improve the safety of the first electrical connector 100 after connection, the length of the tab film 105 corresponding to the first electrical connector 100 can be extended.

[0217] In the length direction of the battery 10, the length L1 of the tab film 105 can be set to L1≤Ld.

[0218] Where L is the length of the first electrical connector 100 in the second direction Y; and d is the width of the second electrical connector 200 in the first direction X.

[0219] It can be seen that the length of the first electrical connector 100 of the first battery 11 that is not covered by the tab film 105 corresponds to the width of the second electrical connector 200 of the second battery 12, which facilitates direct contact between the first electrical connector 100 of the first battery 11 and the second electrical connector 200 of the second battery 12, and makes it easier to effectively weld the first electrical connector 100 and the second electrical connector 200.

[0220] The portion of the first electrical connector 100 located within the tab film 105 can be protected by the insulation of the tab film 105, preventing the first electrical connector 100 from directly contacting the surface of the battery 10.

[0221] Combination Figure 8 and Figure 9 As shown, in some embodiments, the insulating member 300 includes a second insulating member 320, which includes: a third insulating portion 321 located between the first connecting segment 211 and the second connecting segment 212 along the thickness direction of the connecting segment; and / or a fourth insulating portion 322 located on the side of the third connecting segment 213 opposite to the second connecting segment 212 along the thickness direction of the connecting segment.

[0222] By providing a third insulating portion 321 between the first connecting section 211 and the second connecting section 212, the third insulating portion 321 can provide effective electrical isolation, preventing short circuits caused by accidental contact between the conductive structure in the battery module and the second connecting section 212, or electrical faults caused by environmental factors; in addition, the third insulating portion 321 can also isolate the second connecting section 212 and the battery 10, avoiding direct contact between the second connecting section 212 and the surface of the battery 10, especially the aluminum-plastic film at the first sealing edge 101, which would scratch the aluminum-plastic film.

[0223] By providing a fourth insulating portion 322 on the side of the third connecting segment 213 away from the second connecting segment 212, the fourth insulating portion 322 can isolate the third connecting segment 213 from other conductive structures in the battery module, preventing accidental contact from causing a short circuit or electrical failure due to environmental factors; in addition, the fourth insulating portion 322 can also isolate the contact between the third connecting segment 213 and the battery 10, avoiding direct contact between the third connecting segment 213 and the surface of the battery 10, especially the aluminum-plastic film at the first sealing edge 101, which would scratch the aluminum-plastic film.

[0224] The third insulating part 321 and the fourth insulating part 322 are interconnected.

[0225] Specifically, the end of the third insulating portion 321 near the battery 10 and the end of the fourth insulating portion 322 near the battery 10 are connected to each other. The interconnected third insulating portion 321 and fourth insulating portion 322 can cover the bend between the second connecting segment 212 and the third connecting segment 213, effectively preventing direct contact between the second connecting segment 212 and the third connecting segment 213 and the surface of the battery 10, especially the aluminum-plastic film at the first sealing edge portion 101, thus effectively preventing scratches on the aluminum-plastic film.

[0226] In practice, the second insulating part 320 can be pasted at the starting point of the first fold of the second electrical connector 200, and the second insulating part 320 and the second electrical connector 200 can be folded together again to cover the second connecting segment 212 and the third connecting segment 213 with the second insulating part 320. This can prevent the second electrical connector 200 from directly contacting the aluminum-plastic film at the first sealing edge 101 of the battery 10 during the folding process, and prevent the aluminum-plastic film from being scratched.

[0227] For example, the insulating element 300 can be insulating paper, which is an electrical insulating paper with excellent insulation properties and mechanical strength.

[0228] It should be noted that insulating covers can be provided on the outside of the second connecting section 212 and the third connecting section 213. The insulating covers can provide electrical isolation between the two and prevent them from directly contacting the surface of the battery 10. Therefore, the form of the insulating element 300 is not limited in this application.

[0229] The first insulating component 310 and the second insulating component 320 can be an integral structure that can cover the part where the bending structure 110 of the first battery 11 and the folding structure 210 of the second battery 12 are connected, thus preventing these connection parts from being exposed and coming into contact with other conductive structures in the battery module, which could lead to a short circuit.

[0230] When the battery 10 has a third sealing edge 103 on both sides in the first direction X, and the third sealing edge 103 is bent toward the third direction Z, if the folding direction of the first electrical connector 100 is toward the third direction Z, the insulating member 300 is disposed on the side of the battery 10 facing the third direction Z. The third sealing edge 103 of the battery 10 may interfere with the insulating member 300. Therefore, an avoidance opening can be provided at the position corresponding to the junction of the insulating member 300 with the first battery 11 and the second battery 12 to avoid the third sealing edge 103 of the first battery 11 and the second battery 12.

[0231] Combination Figures 10 to 12 As shown, in some embodiments, a first sealing portion 101 and a second sealing portion 102 located at the end of the battery 10 form a receiving groove 104; the battery 10 is provided with a protective component, at least a portion of which is located within the receiving groove 104.

[0232] By placing some of the protective components in the receiving slot 104, the unused space at the edge of the battery 10 can be fully utilized, which helps to achieve a rational arrangement within the battery module.

[0233] Combination Figure 10 As shown, in some embodiments, the protection component includes a protector 400; the protector 400 is connected to the battery 10 and is disposed within a receiving slot 104.

[0234] By placing the protector 400 within the receiving slot 104, and directly placing the protector 400 at the end of the battery 10 in the second direction Y, the use of cables or connectors can be reduced, the internal complexity of the battery module can be decreased, and the integration of the battery module can be improved.

[0235] For example, the protector 400 is a battery protection board. The protector 400 can protect the battery 10 by monitoring the voltage and current state of the battery 10 and cutting off the circuit when necessary.

[0236] Combination Figure 10 and Figure 11 As shown, in some embodiments, the protector 400 is provided with a first connector 410 and a second connector 420; in two adjacent batteries 10, the first connector 410 is connected to the bent structure 110 of the first electrical connector 100 of one battery 10; the second connector 420 is connected to the second electrical connector 200 of the other battery 10.

[0237] With this configuration, for a battery 10 with a protector 400, the first electrical connector 100 of the protector 400 can be used as the second electrical connector 200 of the battery 10 to connect with the bent structure 110 of another adjacent battery 10. This allows for convenient connection between batteries 10 without the need to cut or extend the connector of the protector 400, which helps reduce production steps and material waste and improves the connection efficiency of the battery 10.

[0238] In a specific implementation, in two adjacent batteries 10, the second connector 420 of the protector 400 can be connected to the second electrical connector 200 of the second battery 12. The first electrical connector 100 of the protector 400 is provided with a folding structure 210. The connecting part 111 of the first electrical connector 100 of the first battery 11 extends toward and connects with the folding structure 210 of the first electrical connector 100 of the protector 400.

[0239] The first connector 410 of the protector 400 may include an integral electrical connection part 411 and a sampling part 412. The electrical connection part 411 is used to connect with the first electrical connector 100 of the first battery 11 to realize the direct electrical connection between the second battery 12 and the first battery 11. The sampling part 412 can be used to sample the voltage of the battery 10.

[0240] For example, the protector 400 may be a temperature switch. The temperature switch is typically located near the positive electrical connection of the battery 10 to meet requirements such as short-circuit protection, thermal conductivity, fault response speed, electrical safety redundancy, and space optimization.

[0241] It should be noted that the protector 400 can also be connected as the first electrical connector 100 of the first battery 11 to the second battery 12, and the connector of the protector can extend to and connect to the second electrical connector 200 of the second battery 12. Therefore, this application does not limit the specific connection method between the protector 400 and the first battery 11 and the second battery 12.

[0242] Combination Figure 10 As shown, in some embodiments, the protective component includes a first protective member 500; the first protective member 500 is disposed in the receiving groove 104, the first surface of the first protective member 500 along the thickness direction faces the inner wall of the receiving groove 104, and the second surface of the first protective member 500 along the thickness direction faces the protector 400.

[0243] Specifically, the first protective element 500 is placed between the protector 400 and the inner wall of the receiving groove 104. The first protective element 500 can prevent the protector 400 from direct contact with the aluminum-plastic film at the first sealing edge 101, thus avoiding damage to the aluminum-plastic film.

[0244] For example, the first protective element 500 may be insulating paper.

[0245] Combination Figure 12 As shown, in some embodiments, the protection component includes a second protection member 600, the second protection member 600 being provided with a protection cavity 610; at least a portion of the protector 400 is disposed within the protection cavity 610; and / or, at least one of the first electrical connector 100 and the second electrical connector 200 is disposed within the protection cavity 610.

[0246] Specifically, the protector 400 is disposed within the protective cavity 610 of the second protector 600. The second protector 600 can provide electrical isolation for the protector 400 and the electrical connection structure between the protector 400 and the battery 10, preventing accidental electrical contact and short circuits, and improving the durability and reliability of the battery module.

[0247] The first electrical connector 100 is disposed within the protective cavity 610 of the second protective member 600. The second protective member 600 can provide protection for the first electrical connector 100 to prevent accidental electrical contact and short circuit.

[0248] The second electrical connector 200 is disposed within the protective cavity 610 of the second protective member 600. The second protective member 600 can provide protection for the second electrical connector 200 to prevent accidental electrical contact and short circuit.

[0249] The first electrical connector 100 of the first battery 11 and the second electrical connector 200 of the second battery 12 are disposed within the protective cavity 610 of the second protective member 600. The second protective member 600 can provide electrical isolation for the electrical connection structure of the first battery 11 and the second battery 12, prevent accidental electrical contact and short circuit, and improve the durability and reliability of the battery module.

[0250] For example, the second protective element 600 may be insulating paper, and the second protective element 600 may be pasted on the surface of the battery 10 or the protector 400.

[0251] This application provides a battery pack in a second embodiment, including the battery module provided in any of the above embodiments.

[0252] The battery module has been described in detail in the above embodiments and will not be repeated here.

[0253] This application provides an electrical device in three aspects, including a battery module or a battery pack provided in any of the above embodiments.

[0254] The battery module and battery pack have been described in detail in the above embodiments and will not be repeated here.

[0255] For example, electrical equipment can be a new energy vehicle.

[0256] In summary, the battery module, battery pack, and electrical equipment provided in this application embodiment achieve a direct connection between the first electrical connector 100 of the first battery 11 and the second electrical connector 200 of the second battery 12 by directly connecting the connecting part 111 of the first battery 11 and the connecting section of the second battery 12. This simplifies the manufacturing process and eliminates the dependence on connecting components, reducing their usage and lowering production costs. Furthermore, since the batteries 10 no longer need to be soldered to the circuit board for series and parallel connection, current density and loop resistance are effectively reduced, improving the thermal management performance of the battery pack and enhancing overall performance and efficiency. This also reduces the use of circuit boards in the battery module, saving space and contributing to a more compact design. In addition, the stacked connecting sections in the folded structure 210 provide a larger connection surface. When the connecting part 111 is positioned between two adjacent connecting sections, it ensures an effective welding area with the connecting section 111, guaranteeing connection stability and conductivity.

[0257] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application.

Claims

1. A battery module, characterized in that, The device includes multiple batteries, at least some of which are arranged along a first direction; each battery is provided with an electrical connector, the electrical connector including a first electrical connector. At least a portion of the first electrical connectors of the batteries have a bending structure, the bending structure including a connecting portion and a bending portion, the bending portion connecting the battery and the connecting portion, the extending direction of the connecting portion having an angle with the first direction, the angle being in the range of [0°, 70°]; In two adjacent batteries, the connection portion of the first electrical connector of one battery is connected to the electrical connector of the other battery.

2. The battery module according to claim 1, characterized in that, The bending portion includes a first bending portion and a first crease portion. A first end of the first bending portion is connected to the battery, a second end of the first bending portion is connected to the first end of the first crease portion, and a second end of the first crease portion is connected to the connecting portion. Along the thickness direction of the first bend, the first bend and the connecting portion are partially stacked.

3. The battery module according to claim 2, characterized in that, The first bending portion includes a first sub-bending portion, a second crease portion, and a second sub-bending portion connected in sequence; The end of the first sub-bent portion that is away from the second crease portion is connected to the battery, and the second sub-bent portion is connected to the connecting portion through the first crease portion; Along the thickness direction of the first sub-bend, the orthographic projections of the first sub-bend, the second sub-bend, and the connecting portion at least partially overlap.

4. The battery module according to claim 3, characterized in that, Along the thickness direction of the first sub-bend, a portion of the connecting portion is stacked between the first sub-bend and the second sub-bend; or The connecting portion is located on the side of the second sub-bend that is away from the first sub-bend.

5. The battery module according to any one of claims 1-4, characterized in that, The connecting part and the battery are spaced apart.

6. The battery module according to claim 5, characterized in that, The minimum distance between the connecting part and the battery is in the range of [0.1mm, 10mm].

7. The battery module according to claim 3 or 4, characterized in that, It also includes an insulating element, the insulating element comprising a first insulating element, the first insulating element including a first insulating portion located between the first sub-bend and the second sub-bend along the thickness direction of the first bend; and / or The first insulating member includes a second insulating portion, which is located on the side of one of the connecting portion and the second sub-bend portion away from the other along the thickness direction of the first bend portion.

8. The battery module according to claim 2, characterized in that, The electrical connector includes a second electrical connector; In two adjacent batteries, the connection portion of the first electrical connector of one battery is connected to the second electrical connector of the other battery.

9. The battery module according to claim 8, characterized in that, The first and second electrical connectors of the battery have opposite polarities.

10. The battery module according to claim 8, characterized in that, At least a portion of the second electrical connectors of the batteries have a folded structure; In two adjacent batteries, the connecting portion of the first electrical connector of one battery is connected to the folded structure of the second electrical connector of the other battery.

11. The battery module according to claim 10, characterized in that, The second electrical connector having the folded structure includes at least two connecting segments connected in sequence; Along the thickness direction of the connecting segment, at least two connecting segments are stacked to form the folded structure; In two adjacent batteries, the connection portion of one battery is connected to at least one connection segment of the other battery.

12. The battery module according to claim 11, characterized in that, The first bent portion and the connecting portion are partially stacked, and the stacking direction of the first bent portion and the connecting portion is the same as the stacking direction of the at least two connecting segments.

13. The battery module according to claim 8, characterized in that, The second electrical connector includes a first connecting segment, a second connecting segment, and a third connecting segment connected in sequence; The first end of the first connecting segment is connected to the battery, the second end of the first connecting segment extends away from the battery and is connected to the first end of the second connecting segment, the second end of the second connecting segment extends towards the battery and is connected to the first end of the third connecting segment, and the second end of the third connecting segment extends away from the battery.

14. The battery module according to claim 13, characterized in that, Along the thickness direction of the first connecting segment, the connecting portion is disposed between the first connecting segment and the second connecting segment, and / or, the connecting portion is disposed between the second connecting segment and the third connecting segment.

15. The battery module according to claim 13, characterized in that, It also includes an insulating element, the insulating element comprising a second insulating element, the second insulating element comprising: A third insulating portion, along the thickness direction of the connecting segment, is located between the first connecting segment and the second connecting segment; and / or The fourth insulating part is located on the side of the third connecting segment away from the second connecting segment, along the thickness direction of the connecting segment.

16. The battery module according to any one of claims 8-15, characterized in that, The battery has a first sealing edge and a second sealing edge at its end, the second sealing edge protruding from the first sealing edge, and the first sealing edge and the second sealing edge forming a receiving groove. The battery module is provided with a protective component, at least a portion of which is located within the receiving slot.

17. The battery module according to claim 16, characterized in that, The protection component includes a protector; The protector is connected to the battery and is disposed within the receiving slot.

18. The battery module according to claim 17, characterized in that, The protector is provided with a first connector and a second connector; In two adjacent batteries, the first connector is connected to the bent structure of the first electrical connector of one battery; the second connector is connected to the second electrical connector of the other battery.

19. The battery module according to claim 17, characterized in that, The protection component also includes a first protective element; The first protective member is disposed in the receiving groove, with the first surface of the first protective member along the thickness direction facing the inner wall of the receiving groove, and the second surface of the first protective member along the thickness direction facing the protector.

20. The battery module according to claim 17, characterized in that, The protective component further includes a second protective element, which has a protective cavity. At least a portion of the protector is disposed within the protective cavity; And / or, at least a portion of at least one of the first electrical connector and the second electrical connector is disposed within the protective cavity.

21. A battery pack, characterized in that, Includes the battery module as described in any one of claims 1-20.

22. An electrical appliance, characterized in that, This includes the battery module as described in any one of claims 1-20, or the battery pack as described in claim 21.

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