Battery module and electric equipment

Abstract

The utility model discloses a battery module and electric equipment. The battery module comprises a battery cell assembly, two end plates, a bracket and a first circuit board, the battery cell assembly comprises a plurality of battery cells arranged along a first direction, each battery cell comprises a battery cell main body and an electrode terminal, the electrode terminal extends out from the end part of the battery cell main body along a second direction, and the first direction is perpendicular to the second direction. The two end plates are arranged on the two sides of the battery cell assembly in the first direction respectively. The bracket is arranged on one side, along the second direction, of the battery cell assembly and is connected to the two end plates; the first circuit board is connected with the electrode terminal, at least part of the first circuit board is arranged between the battery cell main body and the bracket, and the first circuit board is fixed on the bracket. The support can support the first circuit board to a certain extent, the deformation or fracture risk of the first circuit board is reduced, and the overall structural strength and stability are improved.

Description

Technical Field

[0001] This application relates to the field of energy storage technology, and in particular to a battery module and an electrical device. Background Technology

[0002] Rechargeable battery cells are those that can be recharged after being discharged, allowing the active materials to be reactivated and reused. Rechargeable battery cells are widely used in electronic devices such as mobile phones, laptops, and drones.

[0003] Battery modules typically consist of multiple battery cells and circuit boards that are electrically connected to these cells. Circuit boards have limited strength, and reducing the risk of deformation or breakage has been a ongoing research focus in the industry. Utility Model Content

[0004] This application provides a battery module and electrical equipment that helps reduce the risk of circuit board deformation or breakage and improves the overall structural strength and stability.

[0005] In a first aspect, this application provides a battery module comprising a cell assembly, two end plates, a bracket, and a first circuit board. The cell assembly includes a plurality of cells arranged along a first direction. Each cell includes a cell body and electrode terminals. The electrode terminals extend from the end of the cell body along a second direction, with the first direction perpendicular to the second direction. The two end plates are respectively disposed on both sides of the cell assembly along the first direction. The bracket is disposed on one side of the cell assembly along the second direction and is connected to the two end plates. The first circuit board is connected to the electrode terminals, and at least a portion of the first circuit board is disposed between the cell body and the bracket, and the first circuit board is fixed to the bracket. The bracket can support the first circuit board to a certain extent, which helps reduce the risk of deformation or breakage of the first circuit board and improves the overall structural strength and stability. The bracket can also support electrical components such as fuses and relays, which helps improve structural compactness and integration. Furthermore, since the bracket is connected to the two end plates, the torque and pressure borne by the first circuit board and / or the bracket can be transmitted to the end plates, which can increase the magnitude of the torque and / or pressure that the bracket and the first circuit board can withstand, further improving structural compactness and integration.

[0006] In one or more of the above optional embodiments, along the third direction, the size of the first circuit board is d1, and the size of the battery cell body is d2, where d1 < 0.5d2, and the first direction, the second direction, and the third direction are perpendicular to each other. The relatively small size of the first circuit board along the third direction is beneficial for reducing the amount of raw materials used in the first circuit board, lowering manufacturing costs, and reducing the weight of the battery module.

[0007] In one or more of the above optional embodiments, the battery module includes a first conductive element and a second conductive element. One of the positive and negative terminals of the battery cell assembly is connected to the first conductive element, and the other is connected to the second conductive element. The first conductive element is connected to a first circuit board and a bracket, and the second conductive element is also connected to the first circuit board and the bracket. The first and second conductive elements can lead out the positive and negative terminals of the battery cell assembly, so that the positive and negative terminals of the battery cell assembly can be connected to an external circuit structure respectively. Both the first and second conductive elements are connected to the bracket, which helps to improve the installation stability of the first and second conductive elements and increase the torque that the first and second conductive elements can withstand.

[0008] In one or more of the above optional embodiments, the electrode terminals include a first electrode terminal and a second electrode terminal with opposite polarities; the first electrode terminal of the battery cell located at one end of the battery cell assembly along the first direction is connected to the first conductive element, and the second electrode terminal of the battery cell located at the other end of the battery cell assembly along the first direction is connected to the second conductive element.

[0009] In one or more of the above optional embodiments, the first conductive element includes a first connecting portion and a second connecting portion. The first connecting portion is connected to the electrode terminal, and at least a portion of the first connecting portion is located between the bracket and the cell body along the second direction. The second connecting portion protrudes from the first connecting portion in the direction opposite to the cell body along the second direction and is connected to the bracket. The bracket can limit the first connecting portion in the second direction, which is beneficial for the first connecting portion to fit tightly against the electrode terminal and improve the connection reliability between the first connecting portion and the electrode terminal. The second connecting portion protruding from the first connecting portion in the direction opposite to the cell body along the second direction facilitates the connection between the second connecting portion and the bracket, which is beneficial for improving connection reliability and stability.

[0010] In one or more of the above optional embodiments, the bracket includes a main body and a first support. The main body is connected to an end plate, and the first support is located on the side of the main body facing away from the battery cell body. The main body has a first clearance structure, and a second connecting part passes through the first clearance structure and extends to the side of the first support part along a third direction. The second connecting part is connected to the first support part, and the first direction, the second direction, and the third direction are perpendicular to each other. The first connecting part of the first circuit board and / or the first conductive element can be attached to the main body, which is beneficial to improving structural stability and compactness. The second connecting part of the first conductive element extends through the first clearance structure to the side of the main body facing away from the battery cell body, which facilitates the connection of the second connecting part to the external circuit structure. The first support can provide support for the second connecting part along a third direction, which is beneficial to improving the stability of the first conductive element and simplifying the connection operation between the first conductive element and the external circuit structure.

[0011] In one or more of the above optional embodiments, the first circuit board includes a first substrate, a first protrusion, and a second protrusion. The first and second protrusions protrude from the first substrate along a third direction, and the first, second, and third directions are perpendicular to each other. Along the first direction, the second protrusion and the first protrusion are spaced apart. The battery module includes a sampling component and an insulating component. The sampling component is disposed on the side of the first protrusion away from the cell body and connected to the electrode terminal. At least a portion of the insulating component is disposed on the side of the first circuit board along the second direction and covers the first circuit board along the second direction. The insulating component is connected to the second protrusion. The insulating component can insulate and isolate the first circuit board and the cell assembly from external structures, which is beneficial for protecting the first circuit board and the cell assembly and reducing the risk of short circuits. The first protrusion can provide a mounting base for the sampling component, and the second protrusion can be used for connection between the first circuit board and the insulating component. The spaced arrangement of the first and second protrusions can minimize the use of raw materials for the first circuit board, reduce costs, and lighten the weight of the battery module.

[0012] In one or more of the above optional embodiments, the battery module includes a second circuit board connected to two end plates; the first circuit board and the second circuit board are respectively disposed on both sides of the cell body along a second direction, and along the first direction, the size of the first circuit board is smaller than the size of the second circuit board. The second circuit board is directly connected to the two end plates, which helps to simplify the structure, save space, and reduce the weight of the battery module.

[0013] In one or more of the above optional embodiments, along the third direction, the size of the second circuit board is d3, and the size of the battery cell body is d2, where d3 < 0.5d2, and the first direction, the second direction, and the third direction are perpendicular to each other. The relatively small size of the second circuit board along the third direction helps to reduce the amount of raw materials used for the second circuit board, lower manufacturing costs, and reduce the weight of the battery module.

[0014] In one or more of the above optional embodiments, the battery module further includes a support plate and an insulating component. The support plate is disposed on one side of the cell assembly along a third direction, with the first direction, the second direction, and the third direction perpendicular to each other. The insulating component is disposed on the other side of the cell assembly along the third direction and on both sides of the cell assembly along the second direction, covering the first circuit board. The thickness of the support plate is greater than the thickness of the insulating component. The support plate and the insulating component can cover the circumference of the cell assembly, which is beneficial for the insulation isolation between the cell assembly and the external structure, and also improves the safety protection effect of the cell assembly. The relatively thick support plate is beneficial for enhancing the support strength and stability. The relatively thin insulating component is beneficial for reducing material usage and weight.

[0015] Secondly, this application provides an electrical device that includes a battery module according to any embodiment of the first aspect. Attached Figure Description

[0016] The features, advantages, and technical effects of exemplary embodiments of this application will now be described with reference to the accompanying drawings.

[0017] Figure 1 This is a schematic diagram of the structure of a battery module provided in some embodiments of this application;

[0018] Figure 2 for Figure 1 The exploded structure diagram of the battery module shown.

[0019] Figure 3 for Figure 1 The diagram shows a partial structural representation of the battery module in one orientation.

[0020] Figure 4 for Figure 1 A schematic diagram of part of the battery module structure from another orientation;

[0021] Figure 5 for Figure 1 A schematic diagram of the structure of the first conductive component of the battery module shown.

[0022] Figure 6 for Figure 1 A schematic diagram of the structure of the first circuit board, first conductive component, second conductive component, and sampling component of the battery module shown;

[0023] Figure 7 for Figure 1 A schematic diagram of the support structure for the battery module shown;

[0024] Figure 8 for Figure 1 A schematic diagram of the second circuit board and sampling component of the battery module shown;

[0025] Figure 9 The diagram shows the structure of electrical equipment provided in some embodiments of this application.

[0026] The reference numerals in the accompanying drawings for the specific embodiments are as follows:

[0027] Battery module 1, electrical equipment 2;

[0028] Battery cell assembly 10, battery cell 11, battery cell body 111, electrode terminal 112, first electrode terminal 112a, second electrode terminal 112b, end plate 20, constraint member 30, bracket 40, main body part 41, first clearance structure 411, second clearance structure 412, first support part 42, second support part 43, first circuit board 50, first substrate 51, first protrusion 52, channel 521, second protrusion 53, first connection port 54, first conductive member 61, first connection part 611, first portion 6111, second portion 6112, second connection part 612, second conductive member 62, sampling member 70, insulating member 81, first insulating part 811, second insulating part 812, third insulating part 813, support plate 82, second circuit board 90, second substrate 91, third protrusion 92, fourth protrusion 93, second connection port 94;

[0029] First direction X, second direction Y, third direction Z. Detailed Implementation

[0030] 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 described below with reference to the accompanying drawings. Obviously, the described embodiments are some embodiments of this application, but not all embodiments.

[0031] The terms "first," "second," "third," etc., used in the specification, claims, or accompanying drawings of this application are used to distinguish different objects, not to describe a specific order or hierarchy. In the embodiments of this application, the same reference numerals denote the same components, and for the sake of brevity, detailed descriptions of the same components are omitted in different embodiments.

[0032] In this application, the reference to "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places in the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment that is mutually exclusive with other embodiments.

[0033] In the description of this application, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0034] In the embodiments of this application, "parallel" includes not only the case of absolute parallelism, but also the case of approximate parallelism as commonly understood in engineering; similarly, "perpendicular" also includes not only the case of absolute perpendicularity, but also the case of approximate perpendicularity as commonly understood in engineering. For example, if the angle between two directions is 85°-95°, the two directions can be considered perpendicular; if the angle between two directions is 0°-10°, the two directions can be considered parallel.

[0035] The battery module and electrical device of this application are described below with reference to the accompanying drawings.

[0036] Reference Figures 1 to 9 This application provides a battery module 1, which includes a cell assembly 10. The cell assembly 10 includes a plurality of cells 11 arranged along a first direction X. Each cell 11 includes a cell body 111 and an electrode terminal 112, which extends from the end of the cell body 111 along a second direction Y, wherein the first direction X is perpendicular to the second direction Y.

[0037] Optionally, the first direction X can be the thickness direction of the battery cell 11, and the second direction Y can be the length direction of the battery cell 11.

[0038] The battery cell body 111 may include a housing and an electrode assembly, with the electrode assembly disposed within the housing.

[0039] In some examples, the housing may consist of a single component folded into two parts that enclose and connect the electrode assembly. In other examples, the housing may also comprise two separate components that enclose and connect the electrode assembly in opposite directions.

[0040] Electrode terminal 112 is connected to the electrode assembly and extends outside the housing. Electrode terminal 112 can bring the polarity of the electrode assembly outside the housing for easy connection with conductive components.

[0041] The electrode assembly may include a positive electrode, a negative electrode, and a separator between the positive electrode and the negative electrode, wherein the positive electrode, the separator, and the negative electrode are stacked in sequence or stacked in sequence and then wound together.

[0042] The electrode terminal 112 may include a positive terminal and a negative terminal, with the positive terminal connected to the positive electrode plate and the negative terminal connected to the negative electrode plate.

[0043] The positive and negative terminals can be led out from the same end of the cell body 111 in the second direction Y, or they can be led out from two separate ends of the cell body 111 in the second direction Y.

[0044] In some embodiments, the battery module 1 further includes two end plates 20, which are respectively disposed on both sides of the cell assembly 10 along the first direction X.

[0045] Two end plates 20 are spaced apart along a first direction X, forming a space between the two end plates 20 for accommodating the battery cell assembly 10. The battery cell assembly 10 is installed between the two end plates 20, and the two end plates 20 provide safety protection for the battery cell assembly 10.

[0046] In some embodiments, the end plate 20 can be a metal component to enhance its structural strength and improve its safety protection effect. In some embodiments, the end plate 20 can be a plastic component to provide safety protection for the cell assembly 10 while reducing the weight of the battery module 1.

[0047] In some embodiments, the battery module 1 further includes a constraint member 30, which connects two end plates 20 and is used to apply opposing pre-tensioning forces to the two end plates 20 so that the multiple cells 11 are arranged more closely, which helps to reduce the shaking of the cells 11.

[0048] Optionally, the constraint member 30 may surround the exterior of the two end plates 20 and the cell assembly 10.

[0049] In some embodiments, the restraint member 30 may be a steel strip covered with a PET (polyethylene terephthalate) protective layer.

[0050] In some embodiments, the battery module 1 further includes a bracket 40, which is disposed on one side of the cell assembly 10 along the second direction Y, and the bracket 40 is connected to two end plates 20.

[0051] The bracket 40 can extend as a whole along the first direction X, and its two ends along the first direction X can be respectively connected to two end plates 20. The connection between the bracket 40 and the end plates 20 includes, but is not limited to, screw connection or snap-fit ​​connection.

[0052] In the first direction X, the two ends of the bracket 40 do not extend beyond the two end plates 20, so as to reduce the space occupied by the bracket 40 in the first direction X.

[0053] The bracket 40 can be made of plastic, which is lightweight and helps to reduce the weight of the battery module 1.

[0054] In some embodiments, the battery module 1 further includes a first circuit board 50, which is connected to the electrode terminal 112. At least a portion of the first circuit board 50 is disposed between the cell body 111 and the bracket 40, and the first circuit board 50 is fixed to the bracket 40.

[0055] The electrode terminals 112 of the battery cell 11 can be directly connected to the first circuit board 50 or indirectly connected to the first circuit board 50.

[0056] Along the first direction X, both ends of the first circuit board 50 do not extend beyond the bracket 40. Along the second direction Y, the first circuit board 50 can be located entirely between the cell body 111 of the plurality of cells 11 and the bracket 40.

[0057] The bracket 40 and the first circuit board 50 may be disposed on the side of the cell assembly 10 having the electrode terminal 112, so that the first circuit board 50 can be connected to the electrode terminal 112 and the first circuit board 50 can be fixed to the bracket 40.

[0058] The first circuit board 50 can be fixed to the bracket 40 by screw connection, snap-fit, adhesive or other suitable means.

[0059] The first circuit board 50 and the end plate 20 can be connected or separated.

[0060] The first circuit board 50 is fixed to the bracket 40. The bracket 40 can support the first circuit board 50 to a certain extent, which helps reduce the risk of deformation or breakage of the first circuit board 50 and improves the overall structural strength and stability. The bracket 40 can also support electrical components such as fuses and relays, which helps improve the structural compactness and integration. Furthermore, the bracket 40 is connected to the two end plates 20, and the torque and pressure borne by the first circuit board 50 and / or the bracket 40 can be transmitted to the end plates 20, which can increase the magnitude of torque and / or pressure that the bracket 40 and the first circuit board 50 can withstand, which helps to further improve the structural compactness and integration.

[0061] In some embodiments, along the third direction Z, the size of the first circuit board 50 is d1, the size of the battery cell body 111 is d2, d1 < 0.5d2, and the first direction X, the second direction Y and the third direction Z are perpendicular to each other.

[0062] The dimensions of the cell body 111 of each cell 11 along the third direction Z can be considered to be the same, and the two ends of the cell body 111 of the multiple cells 11 are respectively flush with each other along the third direction Z.

[0063] Optionally, the third direction Z can be the width direction of the cell 11.

[0064] Optionally, the ratio between d1 and d2 can be 0.1, 0.2, 0.3, 0.4, or any value between any two of them.

[0065] Along the third direction Z, the first circuit board 50 may be located in the middle of the cell body 111 to facilitate connection of the electrode terminals 112.

[0066] The dimension d1 of the first circuit board 50 along the third direction Z is less than half of the dimension d2 of the cell body 111 along the third direction Z. The relatively small dimension of the first circuit board 50 along the third direction Z is beneficial to reduce the amount of raw materials used in the first circuit board 50, reduce manufacturing costs, and reduce the weight of the battery module 1.

[0067] In some embodiments, the battery module 1 includes a first conductive element 61 and a second conductive element 62. One of the positive and negative terminals of the cell assembly 10 is connected to the first conductive element 61, and the other is connected to the second conductive element 62. The first conductive element 61 is connected to the first circuit board 50 and the bracket 40, and the second conductive element 62 is connected to the first circuit board 50 and the bracket 40.

[0068] The battery cell assembly 10 has a total positive terminal and a total negative terminal. A first conductive element 61 is connected to one of the total positive terminal and the total negative terminal, and a second conductive element 62 is connected to the other of the total positive terminal and the total negative terminal.

[0069] The electrode terminal 112 may include a first electrode terminal 112a and a second electrode terminal 112b with opposite polarities. One of the first electrode terminal 112a and the second electrode terminal 112b is a positive terminal and the other is a negative terminal.

[0070] The first electrode terminal 112a of the battery cell 11 located at one end of the battery cell assembly 10 along the first direction X is connected to the first conductive member 61, and the second electrode terminal 112b of the battery cell 11 located at the other end of the battery cell assembly 10 along the first direction X is connected to the second conductive member 62. The first electrode terminal 112a of the battery cell 11 located at one end of the battery cell assembly 10 along the first direction X and the second electrode terminal 112b of the battery cell 11 located at the other end of the battery cell assembly 10 along the first direction X can serve as the overall positive terminal and the overall negative terminal of the battery cell assembly 10.

[0071] The first conductive element 61 can be electrically connected to the first circuit board 50, or it can be fastened to the first circuit board 50 by screws, bolts or other suitable components.

[0072] The second conductive element 62 can be electrically connected to the first circuit board 50, or it can be fastened to the first circuit board 50 by screws, bolts or other suitable components.

[0073] The first conductive element 61 and the second conductive element 62 can be connected to the bracket 40 by screws, snap-fit, adhesive or other suitable means.

[0074] The first conductive element 61 and the second conductive element 62 can lead out the positive and negative terminals of the battery cell assembly 10, so that the positive and negative terminals of the battery cell assembly 10 can be connected to the external circuit structure respectively. The first conductive element 61 and the second conductive element 62 are both connected to the bracket 40, which helps to improve the installation stability of the first conductive element 61 and the second conductive element 62 and increase the torque that the first conductive element 61 and the second conductive element 62 can withstand.

[0075] In some embodiments, the first conductive element 61 includes a first connecting portion 611 and a second connecting portion 612. The first connecting portion 611 is connected to the first electrode terminal 112a, and at least a portion of the first connecting portion 611 is located between the support 40 and the cell body 111 along the second direction Y. The second connecting portion 612 protrudes from the first connecting portion 611 along the second direction Y in a direction opposite to the cell body 111, and the second connecting portion 612 is connected to the support 40.

[0076] The first connecting portion 611 is connected to the first circuit board 50. Optionally, at least a portion of the first connecting portion 611 may be sandwiched between the first circuit board 50 and the bracket 40.

[0077] The first connecting portion 611 may be generally L-shaped, and includes a first part 6111 and a second part 6112. The first part 6111 extends along a third direction Z and is connected to the first electrode terminal 112a, the second part 6112 extends along a first direction X, and the second connecting portion 612 is connected to the second part 6112.

[0078] Both the first connecting portion 611 and the second connecting portion 612 can be sheet-like structures. The thickness direction of the first connecting portion 611 is parallel to the second direction Y, which is beneficial to increasing the connection area between the first connecting portion 611 and the first electrode terminal 112a, improving connection reliability, and reducing the space occupied by the first connecting portion 611 in the second direction Y.

[0079] The bracket 40 can limit the first connecting portion 611 along the second direction Y, which helps the first connecting portion 611 to fit tightly against the first electrode terminal 112a, improving the connection reliability between the first connecting portion 611 and the first electrode terminal 112a. The second connecting portion 612 protrudes from the first connecting portion 611 along the second direction Y in a direction away from the cell body 111, facilitating the connection between the second connecting portion 612 and the bracket 40, which helps improve the connection reliability and stability.

[0080] In some embodiments, the second conductive element 62 may have the same or similar structure as the first conductive element 61, the connection relationship between the second conductive element 62 and the bracket 40 may be the same as the connection relationship between the first conductive element 61 and the bracket 40, and the connection relationship between the second conductive element 62 and the first circuit board 50 may be the same as the connection relationship between the first conductive element 61 and the first circuit board 50, which will not be described in detail here.

[0081] In some embodiments, the bracket 40 includes a main body 41 and a first support 42. The main body 41 is connected to the end plate 20, and the first support 42 is disposed on the side of the main body 41 facing away from the cell body 111. The main body 41 is provided with a first clearance structure 411, and a second connecting portion 612 passes through the first clearance structure 411 and extends to the side of the first support 42 along the third direction Z. The second connecting portion 612 is connected to the first support 42.

[0082] The main body 41 extends along the first direction X, and the two ends of the main body 41 along the first direction X are respectively connected to two end plates 20.

[0083] The first support portion 42 may protrude from at least a portion of the main body portion 41 along the second direction Y, so as to form a support surface on one side of the first support portion 42 along the third direction Z. The second connecting portion 612 may be supported on the support surface.

[0084] The first clearance structure 411 may be provided at the position corresponding to the main body 41 and the first support 42. The first clearance structure 411 and the first support 42 may be provided along the second direction Y, so that the second connecting part 612 can be directly supported on the first support 42 after passing through the first clearance structure 411.

[0085] The first avoidance structure 411 can be an opening, a groove, or other structure that can form an avoidance space.

[0086] The first support part 42 and the second connecting part 612 can be connected by screws, snap-fit, plug-in or other suitable means.

[0087] Optionally, the first support portion 42 may be provided with a first through hole extending in the third direction Z, and the second connecting portion 612 may be provided with a second through hole. The first support portion 42 and the second connecting portion 612 may be connected by a fastener passing through the first through hole and the second through hole.

[0088] The first connecting portion 611 of the first circuit board 50 and / or the first conductive element 61 can be attached to the main body 41, which helps to improve structural stability and compactness. The second connecting portion 612 of the first conductive element 61 extends through the first clearance structure 411 to the side of the main body 41 facing away from the battery cell body 111, which facilitates the connection of the second connecting portion 612 to the external circuit structure. The first support portion 42 can provide support for the second connecting portion 612 in the third direction Z, which helps to improve the stability of the first conductive element 61 and simplifies the connection operation between the first conductive element 61 and the external circuit structure.

[0089] In some embodiments, the bracket 40 includes a second support portion 43, which is disposed on the side of the main body 41 facing away from the cell body 111. The main body 41 is provided with a second clearance structure 412, a portion of the second conductive member 62 passes through the second clearance structure 412 and extends to the side of the second support portion 43 along the third direction Z, and a portion of the second conductive member 62 is connected to the second support portion 43.

[0090] The second support part 43 and the first support part 42 may have the same structure or different structure.

[0091] The second avoidance structure 412 can be an opening, a groove, or other structure that can form an avoidance space.

[0092] The connection method between the second support part 43 and the second conductive element 62 can be the same as the connection method between the first support part 42 and the first conductive element 61, and will not be described again here.

[0093] In some embodiments, the battery module 1 further includes a first connector and a second connector, the first connector being connected to the second connecting portion 612 and the first support portion 42, and the second connector being connected to the second conductive member 62 and the second support portion 43.

[0094] Optionally, the first connector and the second connector can be copper busbars or wire harnesses.

[0095] In some embodiments, the first circuit board 50 includes a first substrate 51, a first protrusion 52 and a second protrusion 53. The first protrusion 52 and the second protrusion 53 protrude from the first substrate 51 along a third direction Z, and the second protrusion 53 and the first protrusion 52 are spaced apart along a first direction X.

[0096] The structures of the first protrusion 52 and the second protrusion 53 may be the same or different.

[0097] There can be multiple first protrusions 52 and second protrusions 53, and the intervals between two adjacent first protrusions 52 and second protrusions 53 are evenly distributed.

[0098] In some embodiments, the battery module 1 includes a sampling component 70 and an insulating component 81. The sampling component 70 is disposed on the side of the first protrusion 52 away from the cell body 111 and connected to the electrode terminal 112. At least a portion of the insulating component 81 is disposed on the side of the first circuit board 50 along the second direction Y and covers the first circuit board 50 along the second direction Y. The insulating component 81 is connected to the second protrusion 53.

[0099] The sampling component 70 can be used to collect parameter information such as voltage, current or temperature of the electrode terminal 112 and send it to the first circuit board 50.

[0100] A portion of the electrode terminal 112 may be disposed on the side of the sampling component 70 opposite to the first protrusion 52 and connected to the sampling component 70.

[0101] The first protrusion 52 may be provided with a channel 521, which extends through the first protrusion 52 along the second direction Y. The sampling component 70 may cover at least a portion of the channel 521 along the second direction Y. The channel 521 can provide a heat dissipation channel for the sampling component 70, which is beneficial for heat dissipation of the sampling component 70.

[0102] Channel 521 can be an opening, a groove, or other structures.

[0103] The insulating component 81 can insulate and isolate the first circuit board 50 and the cell assembly 10 from the external structure, which is beneficial to protect the first circuit board 50 and the cell assembly 10 and reduce the risk of short circuit.

[0104] The first protrusion 52 can provide a mounting base for the sampling component 70, and the second protrusion 53 can be used for the connection between the first circuit board 50 and the insulating component 81. The first protrusion 52 and the second protrusion 53 are spaced apart, which can minimize the amount of material used in the first circuit board 50, reduce costs, and lighten the weight of the battery module 1.

[0105] In some embodiments, the first circuit board 50 is provided with a first connection port 54, which may be disposed on the first substrate 51. The first connection port 54 is disposed facing upward, and the orientation of the first connection port 54 is approximately perpendicular to the thickness direction of the first substrate 51, which facilitates the connection operation between the first connection port 54 and the external circuit structure.

[0106] In some embodiments, the battery module 1 includes a second circuit board 90 connected to two end plates 20. The first circuit board 50 and the second circuit board 90 are respectively disposed on both sides of the cell body 111 along the second direction Y, and along the first direction X, the size of the first circuit board 50 is smaller than the size of the second circuit board 90.

[0107] The second circuit board 90 extends along the first direction X, and its two ends in the first direction X are respectively connected to two end plates 20.

[0108] In the first direction X, the two ends of the second circuit board 90 can extend beyond the first circuit board 50 respectively.

[0109] The second circuit board 90 may include a second substrate 91, a third protrusion 92 and a fourth protrusion 93. The third protrusion 92 and the fourth protrusion 93 protrude from the second substrate 91 along a third direction Z and are spaced apart along a first direction X.

[0110] A sampling component 70 is provided on the side of the third protrusion 92 away from the battery cell body 111. A portion of the insulating component 81 is provided on the side of the second circuit board 90 away from the battery cell body 111 along the second direction Y and is connected to the second circuit board 90. The insulating component 81 covers the second circuit board 90 along the second direction Y.

[0111] The second circuit board 90 is directly connected to the two end plates 20, which helps to simplify the structure, save space, and reduce the weight of the battery module 1.

[0112] In some embodiments, along the third direction Z, the size of the second circuit board 90 is d3, where d3 < 0.5d2.

[0113] Optionally, the ratio between d3 and d2 can be 0.1, 0.2, 0.3, 0.4, or any value between any two of them.

[0114] Along the third direction Z, the size of the second circuit board 90 may be greater than, equal to or less than the size of the first circuit board 50.

[0115] The dimension d3 of the second circuit board 90 along the third direction Z is less than half of the dimension d2 of the cell body 111 along the third direction Z. The relatively small dimension of the second circuit board 90 along the third direction Z is beneficial to reduce the amount of raw materials used in the second circuit board 90, reduce manufacturing costs, and reduce the weight of the battery module 1.

[0116] In some embodiments, the second circuit board 90 is provided with a second connection port 94, which may be disposed on the second substrate 91. The second connection port 94 is disposed facing upward, and the orientation of the second connection port 94 is approximately perpendicular to the thickness direction of the second substrate 91, which facilitates the connection operation between the second connection port 94 and the external circuit structure.

[0117] In some embodiments, the battery module 1 further includes a support plate 82, which is disposed on one side of the cell assembly 10 along the third direction Z. An insulating member 81 is disposed on the other side of the cell assembly 10 along the third direction Z and on both sides of the cell assembly 10 along the second direction Y, and the insulating member 81 covers the first circuit board 50.

[0118] Along the second direction Y, the bracket 40 can be located on the outside of the insulating member 81 facing away from the cell body 111, so as to facilitate the connection of external circuit structure.

[0119] The insulating member 81 may include a first insulating portion 811, a second insulating portion 812, and a third insulating portion 813. At least a portion of the first insulating portion 811 is disposed on the side of the cell assembly 10 facing away from the support plate 82 along the third direction Z. The second insulating portion 812 is disposed on the side of the cell assembly 10 near the bracket 40 along the second direction Y and covers the first circuit board 50. The third insulating portion 813 is disposed on the side of the cell assembly 10 away from the bracket 40 along the second direction Y and covers the second circuit board 90.

[0120] In some examples, the first insulating portion 811, the second insulating portion 812, and the third insulating portion 813 can be independent components, with the first insulating portion 811 and the second insulating portion 812 connected, and the second insulating portion 812 and the third insulating portion 813 connected. A portion of the first insulating portion 811 may be located on the side of the cell assembly 10 along the second direction Y near the bracket 40 and connected to the second protrusion 53 of the first circuit board 50. A portion of the first insulating portion 811 may be located on the side of the cell assembly 10 along the second direction Y away from the bracket 40 and connected to the fourth protrusion 93 of the second circuit board 90.

[0121] In other examples, the first insulating part 811, the second insulating part 812 and the third insulating part 813 may also be an integrally formed structure, with the second insulating part 812 having an opening that exposes the bracket 40 to the outside.

[0122] The support plate 82 can be made of plastic, which can serve as insulation and protection. The support plate 82 and the insulating component 81 can cover the circumference of the battery cell assembly 10, which is beneficial for the insulation and isolation between the battery cell assembly 10 and the external structure, and can also improve the safety protection effect of the battery cell assembly 10.

[0123] In some embodiments, the thickness of the support plate 82 is greater than the thickness of the insulating member 81.

[0124] The third direction Z can be vertical, and the support plate 82 can be located on the lower side of the cell assembly 10 to support the cell assembly 10.

[0125] In some embodiments, the thickness of the support plate 82 can be 1.5mm-3mm, and the thickness of the insulating member 81 can be 0.1mm-0.5mm.

[0126] The support plate 82 is relatively thick, which helps to enhance the support strength and stability. The insulating component 81 is relatively thin, which helps to reduce the amount of material used and the weight.

[0127] This application also provides an electrical device 2, which includes the battery module 1 provided in any of the foregoing embodiments. The battery module 1 can provide electrical energy for the operation of the electrical device 2.

[0128] The electrical device 2 in this application embodiment can be a portable device, a laptop computer, an electric toy, a drone, a power tool, an energy storage system, etc. Power tools include metal cutting power tools, cleaning tools, etc., such as electric drills, electric wrenches, vacuum cleaners, robot vacuum cleaners, etc. This application embodiment does not impose any special limitations on the above-mentioned electrical devices.

[0129] Although this application has been described with reference to preferred embodiments, various modifications can be made thereto and components can be replaced with equivalents without departing from the scope of this application. In particular, the technical features mentioned in the various embodiments can be combined in any manner, provided there is no structural conflict. This application is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. A battery module, characterized in that, include: A battery cell assembly includes a plurality of battery cells arranged along a first direction, each battery cell including a cell body and electrode terminals, the electrode terminals extending from an end of the cell body along a second direction, the first direction being perpendicular to the second direction; Two end plates are respectively disposed on both sides of the battery cell assembly along the first direction; A bracket is disposed on one side of the cell assembly along the second direction, and the bracket is connected to the two end plates; as well as A first circuit board is connected to the electrode terminals, at least a portion of the first circuit board is disposed between the cell body and the bracket, and the first circuit board is fixed to the bracket.

2. The battery module according to claim 1, characterized in that, Along the third direction, the size of the first circuit board is d1, the size of the battery cell body is d2, d1 < 0.5d2, and the first direction, the second direction and the third direction are perpendicular to each other.

3. The battery module according to claim 1 or 2, characterized in that, The battery module includes a first conductive component and a second conductive component. One of the positive and negative terminals of the battery cell assembly is connected to the first conductive component, and the other is connected to the second conductive component. The first conductive element is connected to the first circuit board and the bracket, and the second conductive element is connected to the first circuit board and the bracket.

4. The battery module according to claim 3, characterized in that, The first conductive element includes a first connecting portion and a second connecting portion. The first connecting portion is connected to the electrode terminal. Along the second direction, at least a portion of the first connecting portion is located between the bracket and the cell body. The second connecting portion protrudes from the first connecting portion in the direction away from the main body of the battery cell along the second direction, and the second connecting portion is connected to the bracket.

5. The battery module according to claim 4, characterized in that, The bracket includes a main body and a first support. The main body is connected to the end plate, and the first support is located on the side of the main body facing away from the cell body. The main body is provided with a first clearance structure, the second connecting part passes through the first clearance structure and extends to one side of the first support part along the third direction, the second connecting part is connected to the first support part, and the first direction, the second direction and the third direction are perpendicular to each other.

6. The battery module according to any one of claims 1-5, characterized in that, The first circuit board includes a first substrate, a first protrusion and a second protrusion. The first protrusion and the second protrusion protrude from the first substrate along a third direction. The first direction, the second direction and the third direction are perpendicular to each other. Along the first direction, the second protrusion and the first protrusion are spaced apart. The battery module includes a sampling component and an insulating component. The sampling component is disposed on the side of the first protrusion away from the cell body and connected to the electrode terminal. At least a portion of the insulating component is disposed on the side of the first circuit board along the second direction and covers the first circuit board along the second direction. The insulating component is connected to the second protrusion.

7. The battery module according to any one of claims 2-6, characterized in that, The battery module includes a second circuit board, which is connected to the two end plates; The first circuit board and the second circuit board are respectively disposed on both sides of the battery cell body along the second direction. Along the first direction, the size of the first circuit board is smaller than the size of the second circuit board.

8. The battery module according to claim 7, characterized in that, Along the third direction, the size of the second circuit board is d3, the size of the battery cell body is d2, d3 < 0.5d2, and the first direction, the second direction and the third direction are perpendicular to each other.

9. The battery module according to any one of claims 1-8, characterized in that, The battery module also includes a support plate and an insulating component. The support plate is disposed on one side of the cell assembly along a third direction, and the first direction, the second direction, and the third direction are perpendicular to each other. The insulating element is disposed on the other side of the cell assembly along the third direction and on both sides of the cell assembly along the second direction, and the insulating element covers the first circuit board; The thickness of the support plate is greater than the thickness of the insulating component.

10. An electrical appliance, characterized in that, Includes the battery module according to any one of claims 1-9.

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