Circuit board assembly, wire harness isolation plate assembly, battery and electric device

Abstract

The utility model relates to a circuit board assembly, a wire harness isolation plate assembly, a battery and an electric device, and belongs to the technical field of batteries. The circuit board assembly comprises a conductive wire core layer, a first flexible film layer, a second flexible film layer and a sampling terminal, and the conductive wire core layer comprises a plurality of conductive wire cores; the first flexible film layer and the second flexible film layer are oppositely arranged along the thickness direction of the conductive wire core layer and clamp the conductive wire core layer. At least one conductive wire core comprises a body part and a first bending part connected with the body part, the body part is located between the first flexible film layer and the second flexible film layer and extends in the first direction, the first bending part extends in the second direction, and the end, away from the body part, of the first bending part is connected with a sampling terminal. An included angle is formed between the first direction and the second direction. According to the circuit board assembly, the sampling difficulty can be effectively reduced, the cost of a sampling scheme is reduced, and the volume energy density of a battery can be improved to a certain extent.

Description

Technical Field

[0001] The present application relates to the field of battery technology, and in particular to a circuit board assembly, a wiring harness isolation plate assembly, a battery, and an electrical device. Background Art

[0002] Energy conservation and emission reduction are the key to the sustainable development of the automobile industry. Electric vehicles have become an important part of the sustainable development of the automobile industry due to their advantages in energy conservation and environmental protection. For electric vehicles, battery technology is an important factor in their development.

[0003] In the manufacturing process of batteries, how to balance the simplification of sampling schemes, the manufacturing production costs of circuit board assemblies, and the energy density of batteries is a technical problem that needs to be solved urgently in battery technology. Utility Model Content

[0004] The purpose of the present application is to provide a circuit board assembly, a wiring harness isolation plate assembly, a battery and an electrical device to address the above-mentioned problems, which can effectively reduce the difficulty of sampling, reduce the cost of the sampling scheme, and can improve the volume energy density of the battery to a certain extent.

[0005] In a first aspect, the present application provides a circuit board assembly, including a conductive wire core layer, a first flexible film layer, a second flexible film layer and a sampling terminal, wherein the conductive wire core layer includes a plurality of conductive wire cores; along the thickness direction of the conductive wire core layer, the first flexible film layer and the second flexible film layer are arranged opposite to each other and sandwich the conductive wire core layer. At least one conductive wire core includes a main body and a first bending portion connected to the main body, the main body is located between the first flexible film layer and the second flexible film layer and extends along a first direction, the first bending portion extends along a second direction, one end of the first bending portion away from the main body is connected to the sampling terminal, and an angle is formed between the first direction and the second direction.

[0006] In the technical solution of the embodiment of the present application, the circuit board assembly is mainly used for signal sampling, and the conductive wire core is an electrical conductor to realize the electrical connection between the two components. At least one conductive wire core includes a main body and a first bending part connected in sequence, and the other end of the first bending part is connected to a sampling terminal. After the sampling terminal collects the signal of the battery, the conductive wire core transmits the sampling signal from the first bending part to the main body, and the sampling signal is then transmitted to the outside of the circuit board assembly via the main body, and finally the sampling signal is transmitted to the signal collection and processing device of the battery to complete the signal sampling.

[0007] On the one hand, the bending direction of the first bending portion relative to the main body is the second direction, and the conductive core can be formed as a whole by simple bending. The bending angle, that is, the angle between the main body and the first bending portion, has a large adjustable space. When the conductive core is routed, it does not have to be a straight extension structure, so the arrangement position of the sampling terminal can be more flexible, and it is only necessary to bend the conductive core to the side where the sampling terminal is located according to the needs. The circuit board assembly with the conductive core layer is fully suitable for the sampling needs of batteries at various positions, and has a simple process, low manufacturing and production costs, and low sampling difficulty.

[0008] On the other hand, the first flexible film layer and the second flexible film layer jointly cover and sandwich the conductive wire core layer, playing an insulating role, and at least part of the sampling terminal extends out of the first flexible film layer and the second flexible film layer to facilitate signal collection. At the same time, the first flexible film layer and the second flexible film layer are both flexible structures. Compared with rigid or hard materials, the first flexible film layer and the second flexible film layer have a certain deformation margin, which can better meet the needs of a certain expansion of the battery under use. Each conductive wire core connected to the sampling terminal is formed by bending, and naturally has a certain ability to deform under force. The first flexible film layer, the second flexible film layer and the conductive wire core layer can meet the needs of each part of the circuit board assembly to adaptively adjust the position when the battery is in an expanded state, and also improve the connection stability between the conductive wire core and the sampling terminal.

[0009] In addition, the thickness direction of the conductive wire core layer is consistent with the thickness direction of the first flexible film layer and the thickness direction of the second flexible film layer. The thicknesses of the first flexible film layer and the second flexible film layer are both relatively thin, so that the overall thickness of the circuit board assembly can be effectively controlled, and when applied to battery sampling, the battery energy density can be effectively controlled or even improved.

[0010] In some embodiments, along the thickness direction of the conductive core layer, the first flexible film layer is located on one side of the main body and the first bending portion, and the second flexible film layer is located on the other side of the main body and the first bending portion.

[0011] In the technical solution of the embodiment of the present application, the first flexible film layer and the second flexible film layer are always arranged relatively to each other along the thickness direction of the conductive wire core layer, and the first flexible film layer and the second flexible film layer are each always a complete and integrated structure. Along the first direction, the first flexible film layer and the second flexible film layer have no bending parts and folded parts, and are not cut or folded along with the bending of the conductive wire core. This is a structural design of a circuit board assembly that is different from the related art.

[0012] In the circuit board assembly of the present scheme, multiple conductive cores are arranged, and at least one conductive core is bent to form a first bending portion to form a conductive core layer, and then the conductive core layer is sandwiched between the first flexible film layer and the second flexible film layer, which can improve the production cycle, and the production and manufacturing scheme is simple. After the manufacturing is completed, it can be directly put into the wire harness isolation plate assembly for use. There is no need to trim, cut or even bend and fold the circuit board assembly on site during the assembly of the wire harness isolation plate assembly. The method of use is simple, which significantly simplifies the manufacture and assembly of the sampling scheme, and can effectively improve the assembly efficiency of the wire harness isolation plate assembly.

[0013] In some embodiments, the thickness direction of the conductive core layer, the first direction, and the second direction are perpendicular to each other.

[0014] In the technical solution of the embodiment of the present application, the first direction is the length direction of the main body, and the second direction is the length direction of the first bend. On the one hand, since the main body and the first bend extend toward the first direction and the second direction respectively, the arrangement of the main body and the first bend is facilitated by making the first direction and the second direction perpendicular to each other. On the other hand, by making the thickness direction of the conductive wire core layer perpendicular to both the first direction and the second direction, the dimension of the conductive wire core layer in the thickness direction can be effectively controlled and reduced, and along the thickness direction of the conductive wire core layer, the first flexible film layer, the conductive wire core layer and the second flexible film layer are arranged compactly in sequence, which is beneficial to improving the energy density of the battery.

[0015] In some embodiments, along the first direction, at least one first bending portion has a first groove and a second groove disposed on both sides thereof;

[0016] Along the thickness direction of the conductive wire core layer, the first groove and the second groove both penetrate the first flexible film layer and the second flexible film layer;

[0017] Along the second direction, the opening of the first groove and the opening of the second groove are both oriented toward the side where the sampling terminal connected to the corresponding first bending portion is located.

[0018] In the technical solution of the embodiment of the present application, along the first direction, the first groove and the second groove are respectively arranged on both sides of at least one first bending portion, which means that, when there are multiple first bending portions, only one first bending portion can be respectively arranged on both sides of the first groove and the second groove, or both sides of some first bending portions can be correspondingly arranged with a first groove and a second groove, or both sides of all first bending portions can be correspondingly arranged with a first groove and a second groove.

[0019] It should be noted that when a first groove and a second groove are respectively provided on both sides of a first bending portion, there will be no other first bending portions between the first groove and the first bending portion, and there will be no other first bending portions between the second groove and the first bending portion.

[0020] Along the thickness direction of the conductive wire core layer, the first groove penetrates the first flexible film layer and the second flexible film layer at the same time, and the second groove also penetrates the first flexible film layer and the second flexible film layer at the same time, that is, a part of the first groove is opened on the first flexible film layer, and the remaining part is set on the second flexible film layer, and a part of the first groove and the remaining part of the first groove are directly opposite and connected in the thickness direction of the conductive wire core layer. Similarly, the arrangement relationship between the second groove and the first flexible film layer and the second flexible film layer corresponds to the above description of the first groove, and will not be elaborated here.

[0021] At the same time, along the second direction, the opening of the first groove and the opening of the second groove are both facing the side where the sampling terminal connected to the corresponding first bending portion is located, that is, the first groove and the second groove each have a groove bottom and two groove walls connected to the groove bottom and opposite to each other in the first direction, the two groove walls of the first groove are spaced apart from the end of the groove bottom to form the opening of the first groove, and the two groove walls of the second groove are spaced apart from the end of the groove bottom to form the opening of the second groove.

[0022] The existence of the first groove and the second groove enables the first flexible film layer and the second flexible film layer as a whole to form a movable tongue piece that can make a certain displacement in the first direction between each group of the first groove and the second groove, so that the first bending portion has a certain movable amount in the first direction, reducing the influence of the battery cell expansion on the sampling terminal, and can further meet the battery expansion requirements.

[0023] A plurality of battery cells can be arranged along a first direction to form a battery pack. When a battery cell expands, the first bending portion, the sampling terminal and the movable tongue can all move a certain distance along the first direction to accommodate the displacement of the battery cell.

[0024] In some embodiments, along the thickness direction of the conductive core layer, a projection of the first bending portion of at least one conductive core overlaps with a projection of at least one of the other conductive cores;

[0025] The circuit board assembly also includes a bridging insulating film. Along the thickness direction of the conductive core layer, at least a portion of the bridging insulating film is disposed between the first bending portion corresponding to the overlapped projection and the conductive core.

[0026] In the technical solution of the embodiment of the present application, the conductive core is only used for conducting electricity, and there is no insulating structure outside. Multiple conductive cores are arranged at intervals to achieve insulation. Since the first bending portion needs to extend away from the main body along the second direction, along the thickness direction of the conductive core layer, the projection of the first bending portion of at least one conductive core overlaps with the projection of at least one of the other conductive cores, and it is necessary to perform insulation treatment between the structures with overlapping projections. In order to control the overall thickness of the circuit board assembly, this solution performs insulation treatment between the first bending portion with overlapping projections and the conductive core by setting a bridging insulating film. Specifically: along the thickness direction of the conductive core layer, at least part of the bridging insulating film is arranged between the first bending portion corresponding to the overlapping projection and the conductive core. Under the action of the bridging insulating film, any one conductive core can be bent and led out first. In other words, along the spacing arrangement direction of the multiple conductive cores, the conductive core with the first bending portion can be arranged in the middle of the conductive core layer, and can cross other conductive cores and connect the sampling terminal first.

[0027] It should be noted that, along the thickness direction of the conductive core layer, the projection of the first bending portion of at least one conductive core overlaps with the projection of at least one of the other conductive cores. This may refer to the overlapping projections of the first bending portion and the main body of the other conductive cores, or the overlapping projections of the first bending portion and the first bending portions of the other conductive cores.

[0028] In some embodiments, the conductive wire core includes a first conductive wire core, the sampling terminal includes a voltage sampling terminal, and the first bent portion of the first conductive wire core is connected to the voltage sampling terminal;

[0029] Among them, the voltage sampling terminal includes a first part, a second part and a fuse part connecting the first part and the second part, the first part is connected to the first bending part, the second part is used to connect the busbar, and the overcurrent cross-sectional area of ​​the first part and the overcurrent cross-sectional area of ​​the second part are both larger than the overcurrent cross-sectional area of ​​the fuse part.

[0030] In the technical solution of the embodiment of the present application, the voltage sampling terminal is used to electrically connect the busbar of the battery to collect the voltage information of the battery. The first conductive wire core is correspondingly connected to the voltage sampling terminal, specifically, the first bending portion of the first conductive wire core is connected to the voltage sampling terminal.

[0031] The voltage sampling terminal includes a first part, a second part and a fuse part connecting the first part and the second part, the first part is connected to the first bending part, and the second part is used to connect the wiring harness isolation plate assembly or the battery busbar. The overcurrent cross-sectional area of ​​the first part and the overcurrent cross-sectional area of ​​the second part are both larger than the overcurrent cross-sectional area of ​​the fuse part, and the overcurrent cross-sectional area refers to the area of ​​the cross section perpendicular to the current direction.

[0032] The fuse part is a structural part that plays an overload protection role. The fuse part is configured to respond to the current and melt when the current reaches a preset value. When an abnormal situation such as a short circuit occurs in the voltage sampling, the connection between the first part and the second part is disconnected. Compared with the first part and the second part, the fuse part has a smaller cross-sectional area for overcurrent. When the current abnormally rises to a certain value and the temperature of the fuse part rises to a certain level, the fuse part can melt itself to cut off the current, thus protecting the safe operation of the circuit.

[0033] In some embodiments, along the thickness direction of the conductive wire core layer, a projection area of ​​the first portion is smaller than a projection area of ​​the second portion.

[0034] In the technical solution of the embodiment of the present application, the first part is connected to the first bending part, and the second part is connected to the wiring harness isolation plate assembly or the battery busbar. Along the thickness direction of the conductive wire core layer, the projection area of ​​the first part is smaller than the projection area of ​​the second part. The projection area of ​​the second part is larger, so that the connection area between the second part and the busbar can also be larger. The projection area of ​​the first part is smaller than the projection area of ​​the second part, so that the current cross-sectional area of ​​the first part can also be smaller. When the current is conducted from the first part to the first bending part, the difference in the current cross-sectional area is smaller, and the conducted current and voltage signals can be more stable.

[0035] In some embodiments, the circuit board assembly further includes a first insulating film layer and a second insulating film layer, and along the thickness direction of the conductive core layer, the first portion, the fuse portion and part of the second portion are sandwiched between the first insulating film layer and the second insulating film layer.

[0036] In the technical solution of the embodiment of the present application, the first insulating film layer, the second insulating film layer and the first flexible film layer and the second flexible film layer cooperate with each other to insulate the non-sampling part and the conductive wire core layer of the voltage sampling terminal, and also insulate the connection part between the voltage sampling terminal and the first bending part. The end of the second part away from the fuse part needs to extend outside the first insulating film layer and the second insulating film layer.

[0037] Along the thickness direction of the conductive wire core layer, the first insulating film and the first flexible film layer are located on one side of the conductive wire core layer, and the second insulating film and the second flexible film layer are located on the other side of the conductive wire core layer.

[0038] It should be noted that the first insulating film and the first flexible film layer may be an integral structure, or the first insulating film may be an independent structure. Similarly, the second insulating film and the second flexible film layer may be an integral structure, or the second insulating film may be an independent structure.

[0039] In some embodiments, the sampling terminal further includes a temperature sampling terminal, the conductive wire core further includes a second conductive wire core, and the first bending portion of the second conductive wire core is connected to the temperature sampling terminal.

[0040] In the technical solution of the embodiment of the present application, the temperature sampling terminal can contact the battery to collect the temperature information of the battery. The second conductive wire core is connected to the temperature sampling terminal accordingly, specifically, the first bending portion of the second conductive wire core is connected to the temperature sampling terminal.

[0041] In some embodiments, the second conductive wire core also includes a second bending portion, the second bending portion extends outside the first flexible film layer and the second flexible film layer, one end of the second bending portion is connected to the first bending portion, and the other end of the second bending portion is connected to the temperature sampling terminal; there is an angle between the first bending portion and the second bending portion of the second conductive wire core.

[0042] In the technical solution of the embodiment of the present application, in order to facilitate the position arrangement and adjustment of the temperature sampling terminal and adapt to various arrangement schemes of the battery, the second conductive wire core also includes a second bending portion, the second bending portion extends out of the first flexible film layer and the second flexible film layer, one end of the second bending portion is connected to the first bending portion, and the other end of the second bending portion is connected to the temperature sampling terminal; there is an angle between the first bending portion and the second bending portion of the second conductive wire core to achieve secondary bending of the second conductive wire core, and the position of the temperature sampling terminal can be adjusted in multiple directions. In addition, since the second bending portion is provided, and the temperature sampling terminal is provided at one end of the second bending portion away from the first bending portion, the temperature sampling terminal can have a certain amount of mobility, reducing the influence of the battery cell expansion on the temperature sampling terminal.

[0043] In some embodiments, the circuit board assembly further includes a connector connected to an end of the body portion away from the first bending portion.

[0044] In the technical solution of the embodiment of the present application, the connector is used to transmit the data collected by the multiple conductive cores of the conductive core layer to the outside of the circuit board assembly. For the conductive core with the first bending portion, the connector is connected to the end of the main body away from the first bending portion, and the setting position of the connector is determined. For the conductive core without the first bending portion, the end of the conductive core close to the connector is naturally used for electrical connection with the connector.

[0045] In other words, the connector is connected to the end of the conductive wire core layer corresponding to the main body portion away from the first bending portion.

[0046] In a second aspect, a wire harness isolation plate assembly is provided, comprising the circuit board assembly in the above embodiment.

[0047] In a third aspect, a battery is provided, comprising the circuit board assembly in the above embodiment or the wiring harness isolation plate assembly in the above embodiment.

[0048] In a fourth aspect, an electrical device is provided, comprising the battery in the above embodiment, and the battery is used to provide electrical energy.

[0049] Additional aspects and advantages of the present application will be given in part in the description below, and in part will become apparent from the description below, or will be learned through the practice of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0050] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without paying creative work.

[0051] Figure 1 A schematic diagram of the structure of a vehicle provided for some embodiments of the present application.

[0052] Figure 2 A schematic diagram of the structure of a battery provided for some embodiments of the present application (the wiring harness isolation plate assembly is not shown).

[0053] Figure 3 A schematic diagram of an explosion when the wiring harness isolation plate assembly provided in some embodiments of the present application is used for a battery.

[0054] Figure 4 for Figure 3 Schematic diagram of the wiring harness isolation plate assembly after removing the first flexible film layer and the first insulating film layer.

[0055] Figure 5 A schematic diagram of the structure of a circuit board assembly provided in some embodiments of the present application.

[0056] Figure 6 for Figure 5 A top view of the circuit board assembly in FIG.

[0057] Figure 7 for Figure 5 A top view of a circuit board assembly after removing the first flexible film layer.

[0058] Figure 8 for Figure 7 Schematic diagram of a circuit board assembly after removing the first insulating film layer.

[0059] Fig. 9 for Figure 8 A local enlarged schematic diagram of the .

[0060] Fig.10 for Figure 8 Another partially enlarged schematic diagram in the figure.

[0061] Fig.11 A partially enlarged schematic diagram of a circuit board assembly provided in some embodiments of the present application.

[0062] Icon: 1000-vehicle; 100-battery; 110-box; 120-battery cell; 130-wiring harness isolation plate assembly; 131-wiring harness board; 132-bus; 200-motor; 300-controller;

[0063] 400-circuit board assembly; 10-conductive wire core layer; 11-conductive wire core; 111-main body; 112-first bending portion; 113-first conductive wire core; 114-second conductive wire core; 115-second bending portion; 20-first flexible film layer; 30-second flexible film layer; 40-sampling terminal; 41-voltage sampling terminal; 411-first part; 412-second part; 413-fuse part; 42-temperature sampling terminal; 51-first groove; 52-second groove; 60-bridging insulating film; 71-first insulating film layer; 72-second insulating film layer; 80-connector; 81-support plate; 82-connector body; 821-slot. DETAILED DESCRIPTION

[0064] In order to make the purpose, technical solution and advantages of the embodiments of the present application clearer, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0065] Unless otherwise defined, all technical and scientific terms used in this application have the same meaning as those commonly understood by technicians in the technical field of this application; the terms used in the specification of this application are only for the purpose of describing specific embodiments and are not intended to limit this application; the terms "including" and "having" in the specification and claims of this application and the above-mentioned drawings and any variations thereof are intended to cover non-exclusive inclusions. The terms "first", "second", etc. in the specification and claims of this application or the above-mentioned drawings are used to distinguish different objects, rather than to describe a specific order or a primary and secondary relationship.

[0066] Reference to "embodiments" in this application means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present application. The appearance of the phrase in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described in this application may be combined with other embodiments.

[0067] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", and "attached" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be the internal communication of two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0068] In the description of the embodiments of the present application, the term "and / or" is only a description of the association relationship of associated objects, indicating that three relationships may exist. For example, A and / or B can represent: A exists, A and B exist at the same time, and B exists. In addition, the character " / " in this article generally indicates that the associated objects before and after are in an "or" relationship.

[0069] The term "multiple" as used in the present application refers to more than two (including two). Similarly, "multiple groups" refers to more than two groups (including two groups), and "multiple sheets" refers to more than two sheets (including two sheets).

[0070] In this application, the battery mentioned herein refers to a single physical module including one or more battery cells to provide higher voltage and capacity. For example, the battery mentioned in this application may include a battery module or a battery pack, etc.

[0071] At present, from the perspective of market development, the application of power batteries is becoming more and more extensive. Power batteries are not only used in energy storage power systems such as hydropower, thermal power, wind power and solar power stations, but also widely used in electric vehicles such as electric bicycles, electric motorcycles, electric cars, as well as military equipment and aerospace and other fields. With the continuous expansion of the application field of power batteries, the market demand is also constantly expanding.

[0072] For batteries, the signal sampling of the temperature or voltage inside the battery is particularly important for monitoring the use of the battery. Some solutions require the production of a circuit board first, and then cutting, folding it in half to form a bending structure, and leading it outward for connecting the sampling terminal. The sampling scheme is relatively complicated, the assembly is relatively complicated, and the efficiency is low. In addition, this scheme also has the problem that the folding causes the wire to be stressed and easy to break, and the sampling cable cannot be jumped. Other solutions can meet the requirements of simple manufacturing and simple sampling schemes, but cannot effectively take into account the requirements of battery volume energy density and battery expansion. Therefore, there are technical problems in the related technology that the battery sampling scheme cannot take into account the simplification of the sampling scheme, the manufacturing production cost of the circuit board assembly, and the energy density of the battery.

[0073] Based on the above considerations, in order to take into account the simplification of the sampling scheme, the manufacturing cost of the circuit board assembly and the energy density of the battery, a circuit board assembly is designed, including a conductive wire core layer, a first flexible film layer, a second flexible film layer and a sampling terminal, wherein the conductive wire core layer includes a plurality of conductive wire cores; along the thickness direction of the conductive wire core layer, the first flexible film layer and the second flexible film layer are arranged opposite to each other and sandwich the conductive wire core layer. At least one conductive wire core includes a main body and a first bending portion connected to the main body, the main body is located between the first flexible film layer and the second flexible film layer and extends along the first direction, the first bending portion extends along the second direction, and one end of the first bending portion away from the main body is connected to the sampling terminal, and an angle is formed between the first direction and the second direction.

[0074] The main function of the circuit board assembly is to perform signal sampling. The conductive core is an electrical conductor that realizes the electrical connection between the two components. At least one conductive core includes a main body and a first bending portion that are connected in sequence. The other end of the first bending portion is connected to a sampling terminal. After the sampling terminal collects the signal of the battery, the conductive core transmits the sampling signal from the first bending portion to the main body. The sampling signal is then transmitted to the outside of the circuit board assembly via the main body. Finally, the sampling signal is transmitted to the signal collection and processing device of the battery to complete the signal sampling.

[0075] On the one hand, the bending direction of the first bending portion relative to the main body is the second direction, and the conductive core can be formed as a whole by simple bending. The bending angle, that is, the angle between the main body and the first bending portion, has a large adjustable space. When the conductive core is routed, it does not have to be a straight extension structure, so the arrangement position of the sampling terminal can be more flexible, and it is only necessary to bend the conductive core to the side where the sampling terminal is located according to the needs. The circuit board assembly with the conductive core layer is fully suitable for the sampling needs of batteries at various positions, and has a simple process, low manufacturing and production costs, and low sampling difficulty.

[0076] On the other hand, the first flexible film layer and the second flexible film layer jointly cover and sandwich the conductive wire core layer, playing an insulating role, and at least part of the sampling terminal extends out of the first flexible film layer and the second flexible film layer to facilitate signal collection. At the same time, the first flexible film layer and the second flexible film layer are both flexible structures. Compared with rigid or hard materials, the first flexible film layer and the second flexible film layer have a certain deformation margin, which can better meet the needs of a certain expansion of the battery under use. Each conductive wire core connected to the sampling terminal is formed by bending, and naturally has a certain ability to deform under force. The first flexible film layer, the second flexible film layer and the conductive wire core layer can meet the needs of each part of the circuit board assembly to adaptively adjust the position when the battery is in an expanded state, and also improve the connection stability between the conductive wire core and the sampling terminal.

[0077] In addition, the thickness direction of the conductive wire core layer is consistent with the thickness direction of the first flexible film layer and the thickness direction of the second flexible film layer. The thicknesses of the first flexible film layer and the second flexible film layer are both relatively thin, so that the overall thickness of the circuit board assembly can be effectively controlled, and when applied to battery sampling, the battery energy density can be effectively controlled or even improved.

[0078] The circuit board assembly disclosed in the embodiment of the present application can be used but is not limited to being used in a wiring harness isolation plate assembly and a battery. The circuit board assembly disclosed in the present application, or the wiring harness isolation plate assembly equipped with the circuit board assembly disclosed in the present application can be used for battery assembly and battery signal acquisition.

[0079] The battery disclosed in the embodiment of the present application can be used in, but not limited to, electrical devices such as vehicles, ships or aircraft. The battery with the circuit board assembly disclosed in the present application can be used to form a power supply system of the electrical device, which is conducive to improving the safety of the battery and facilitating the promotion of the battery.

[0080] The embodiment of the present application provides an electric device using a battery as a power source, and the electric device may be, but is not limited to, a mobile phone, a tablet, a laptop, an electric toy, an electric tool, a battery car, an electric car, a ship, a spacecraft, etc. Among them, the electric toy may include a fixed or mobile electric toy, such as a game console, an electric car toy, an electric ship toy, and an electric airplane toy, etc., and the spacecraft may include an airplane, a rocket, a space shuttle, and a spacecraft, etc.

[0081] For the convenience of description, the following embodiments are described by taking a vehicle as an example of an electrical device in an embodiment of the present application.

[0082] Please refer to Figure 1 , Figure 1 A schematic diagram of the structure of a vehicle 1000 provided for some embodiments of the present application. The vehicle 1000 may be a fuel vehicle, a gas vehicle or a new energy vehicle, and the new energy vehicle may be a pure electric vehicle, a hybrid vehicle or an extended-range vehicle, etc. A battery 100 is provided inside the vehicle 1000, and the battery 100 may be provided at the bottom, head or tail of the vehicle 1000. The battery 100 may be used to power the vehicle 1000, for example, the battery 100 may be used as an operating power source for the vehicle 1000. The vehicle 1000 may also include a controller 300 and a motor 200, and the controller 300 is used to control the battery 100 to power the motor 200, for example, for starting, navigating and driving the vehicle 1000.

[0083] In some embodiments of the present application, the battery 100 can not only serve as an operating power source for the vehicle 1000, but also serve as a driving power source for the vehicle 1000, replacing or partially replacing fuel or natural gas to provide driving power for the vehicle 1000.

[0084] Please refer to Figure 2 , Figure 2 An exploded view of a battery 100 provided for some embodiments of the present application. The battery 100 includes a housing 110 and a battery cell 120, and the battery cell 120 is contained in the housing 110. The housing 110 is used to provide a storage space for the battery cell 120, and the housing 110 can adopt a variety of structures. In some embodiments, the housing 110 may include a first part and a second part, the first part and the second part cover each other, and the first part and the second part jointly define a storage space for accommodating the battery cell 120. The second part may be a hollow structure with an opening at one end, and the first part may be a plate-like structure, and the first part covers the opening side of the second part, so that the first part and the second part jointly define a storage space; the first part and the second part may also be hollow structures with an opening on one side, and the opening side of the first part covers the opening side of the second part. Of course, the housing 110 formed by the first part and the second part may be in a variety of shapes, such as a cylinder, a cuboid, etc.

[0085] In the battery 100, there may be multiple battery cells 120, and the multiple battery cells 120 may be connected in series, in parallel, or in a mixed connection. A mixed connection means that the multiple battery cells 120 are both connected in series and in parallel. The multiple battery cells 120 may be directly connected in series, in parallel, or in a mixed connection, and then the whole formed by the multiple battery cells 120 is accommodated in the box 110; of course, the battery 100 may also be a battery 100 module formed by connecting multiple battery cells 120 in series, in parallel, or in a mixed connection, and then the multiple battery 100 modules are connected in series, in parallel, or in a mixed connection to form a whole, and accommodated in the box 110. The battery 100 may also include other structures, for example, the battery 100 may also include a busbar component for realizing electrical connection between the multiple battery cells 120.

[0086] Each battery cell 120 may be a secondary battery or a primary battery, or a lithium-sulfur battery, a sodium-ion battery, or a magnesium-ion battery, but is not limited thereto. The battery cell 120 may be cylindrical, flat, rectangular, or in other shapes.

[0087] The battery cell 120 may include a housing, an electrode assembly, and an electrode terminal. The housing includes a shell and an end cap, the shell has an opening, and the end cap closes the opening to isolate the internal environment of the battery cell 120 from the external environment.

[0088] The housing is a component used to cooperate with the end cap to form an internal environment of the battery cell 120, wherein the formed internal environment can be used to accommodate the electrode assembly, electrolyte and other components. The housing and the end cap can be independent components. The housing can be of various shapes and sizes. Specifically, the shape of the housing can be determined according to the specific shape and size of the electrode assembly. The housing can be made of various materials, such as copper, iron, aluminum, stainless steel, aluminum alloy, plastic, etc.

[0089] The end cap refers to a component that covers the opening of the shell to isolate the internal environment of the battery cell 120 from the external environment. Without limitation, the shape of the end cap can be adapted to the shape of the shell to match the shell. Optionally, the end cap can be made of a material with a certain hardness and strength (such as aluminum alloy), so that the end cap is not easily deformed when squeezed and collided, so that the battery cell 120 can have a higher structural strength and reliability can also be improved. Functional components such as electrode terminals can be provided on the end cap. The electrode terminal can be used to electrically connect to the electrode assembly for outputting or inputting electrical energy of the battery cell 120. The material of the end cap can also be a variety of materials, such as copper, iron, aluminum, stainless steel, aluminum alloy, plastic, etc., and the embodiments of the present application do not impose special restrictions on this. In some embodiments, an insulating structure can also be provided on the inner side of the end cap, and the insulating structure can be used to isolate the electrical connection components in the shell from the end cap to reduce the risk of short circuit. Exemplarily, the insulating structure can be plastic, rubber, etc.

[0090] The electrode assembly is a component in the battery cell 120 where an electrochemical reaction occurs. One or more electrode assemblies may be contained in the housing. The electrode assembly is mainly formed by winding or stacking the positive electrode sheet and the negative electrode sheet, and a separator is usually provided between the positive electrode sheet and the negative electrode sheet, and the separator is used to separate the positive electrode sheet and the negative electrode sheet to avoid short circuits within the positive electrode sheet and the negative electrode sheet. The parts of the positive electrode sheet and the negative electrode sheet with active materials constitute the main body of the electrode assembly, and the parts of the positive electrode sheet and the negative electrode sheet without active materials each constitute a pole ear. The positive pole ear and the negative pole ear may be located together at one end of the main body or respectively at both ends of the main body. During the charge and discharge process of the battery 100, the positive electrode active material and the negative electrode active material react with the electrolyte, and the pole ears connect the electrode terminals to form a current loop.

[0091] In some embodiments, the battery cell 120 may also be provided with a pressure relief mechanism for releasing the internal pressure when the internal pressure or temperature of the battery cell 120 reaches a threshold value.

[0092] According to some embodiments of the present application, Figure 5 to Figure 7 As shown, the present application provides a circuit board assembly 400. When the circuit board assembly 400 is used for the battery 100, its main function is to be connected to the battery 100 for signal sampling.

[0093] The circuit board assembly 400 includes a sampling terminal 40, which is a structural member connecting the circuit board assembly 400 and the battery 100. In some embodiments, the sampling terminal 40 can realize voltage signal collection of the battery 100 by being electrically connected to the battery 100. In some embodiments, the sampling terminal 40 can also realize temperature signal collection of the battery 100 by being in contact with the battery 100.

[0094] The circuit board assembly 400 includes a conductive wire core layer 10, which includes a plurality of conductive wire cores 11. The conductive wire core 11 is an electrically conductive member used to achieve electrical connection between two components. In this embodiment, the conductive wire core 11 is mainly used to connect the sampling terminal 40 and transmit the signal of the sampling terminal 40 to the outside of the circuit board assembly 400. Finally, the sampling signal is transmitted to the signal collection and processing device of the battery 100 to complete the sampling of the battery 100.

[0095] The circuit board assembly 400 further includes a first flexible film layer 20 and a second flexible film layer 30 . Along the thickness direction of the conductive core layer 10 , the first flexible film layer 20 and the second flexible film layer 30 are arranged opposite to each other and sandwich the conductive core layer 10 .

[0096] The first flexible film layer 20 and the second flexible film layer 30 are structural members made of insulating materials.

[0097] According to some embodiments of the present application, at least one conductive core 11 includes a main body 111 and a first bending portion 112 connected to the main body 111, the main body 111 is located between the first flexible film layer 20 and the second flexible film layer 30 and extends along a first direction, the first bending portion 112 extends along a second direction, and one end of the first bending portion 112 away from the main body 111 is connected to the sampling terminal 40, and an angle is formed between the first direction and the second direction.

[0098] The first direction is the length direction of the main body 111. The first bent portion 112 has a bent end connected to the main body 111. The bent end allows one end of the first bent portion 112 connected to the sampling terminal 40 to extend toward the second direction. The second direction is the length direction of the first bent portion 112 except the bent section. The extension direction of the bent end is not a single direction, but can be understood as tending toward the second direction.

[0099] like Figure 5-Figure 6 As shown, the thickness direction of the conductive wire core layer 10 is consistent with the thickness direction of the first flexible film layer 20 , and is also consistent with the thickness direction of the second flexible film layer 30 .

[0100] In the above scheme, the conductive core 11 includes a main body 111 and a first bending portion 112 connected in sequence, and the other end of the first bending portion 112 is connected to the sampling terminal 40. After the sampling terminal 40 collects the signal of the battery 100, the conductive core 11 transmits the sampling signal from the first bending portion 112 to the main body 111, and the sampling signal is then transmitted to the outside of the circuit board assembly 400 via the main body 111, and finally the sampling signal is transmitted to the signal collection and processing device of the battery 100 to complete the signal sampling of the battery 100.

[0101] like Figure 7-Figure 8 As shown, on the one hand, the bending direction of the first bending portion 112 relative to the main body 111 is the second direction, and the conductive core 11 can be formed as a whole by simple bending. The bending angle, that is, the angle between the main body 111 and the first bending portion 112, has a large adjustable space. When the conductive core 11 is routed, it does not have to be a straight extension structure, so the arrangement position of the sampling terminal 40 can be more flexible, and it is only necessary to bend the conductive core 11 to the side where the sampling terminal 40 is located according to the needs. The circuit board assembly 400 with the conductive core layer 10 is fully suitable for meeting the sampling needs of the battery 100 at various positions, and has a simple process, low manufacturing production cost, and low sampling difficulty.

[0102] On the other hand, the first flexible film layer 20 and the second flexible film layer 30 jointly cover and sandwich the conductive wire core layer 10, playing an insulating role, and at least part of the sampling terminal 40 extends out of the first flexible film layer 20 and the second flexible film layer 30 to facilitate signal collection. At the same time, the first flexible film layer 20 and the second flexible film layer 30 are both flexible structures. Compared with rigid or hard materials, the first flexible film layer 20 and the second flexible film layer 30 have a certain deformation margin, which can better meet the needs of a certain expansion of the battery 100 in use. Each conductive wire core 11 connected to the sampling terminal 40 is formed by bending, and naturally has a certain ability to deform under force. The first flexible film layer 20, the second flexible film layer 30 and the conductive wire core layer 10 can meet the needs of each part of the circuit board assembly 400 to adjust the position adaptively when the battery 100 is in an expanded state, and also improve the connection stability between the conductive wire core 11 and the sampling terminal 40.

[0103] In addition, the thickness direction of the conductive wire core layer 10 is consistent with the thickness direction of the first flexible film layer 20 and the thickness direction of the second flexible film layer 30. The thicknesses of the first flexible film layer 20 and the second flexible film layer 30 are both relatively thin, so that the overall thickness of the circuit board assembly 400 can be effectively controlled, and thus when applied to battery 100 sampling, the energy density of the battery 100 can be effectively controlled or even improved.

[0104] According to some embodiments of the present application, along the thickness direction of the conductive core layer 10 , the first flexible film layer 20 is located on one side of the main body 111 and the first bending portion 112 , and the second flexible film layer 30 is located on the other side of the main body 111 and the first bending portion 112 .

[0105] like Figure 5 and Figure 7 As shown, along the thickness direction of the conductive core layer 10, the first flexible film layer 20 is located on the same side of the main body 111 and the first bending portion 112, that is, along the Z direction, the first flexible film layer 20 is always located on the upper side of the conductive core layer 10. Along the thickness direction of the conductive core layer 10, the second flexible film layer 30 is located on the same side of the main body 111 and the first bending portion 112, that is, along the Z direction, the second flexible film layer 30 is always located on the lower side of the conductive core layer 10.

[0106] In the above technical scheme, the first flexible film layer 20 and the second flexible film layer 30 are always arranged relatively to each other along the thickness direction of the conductive core layer 10, and the first flexible film layer 20 and the second flexible film layer 30 are always a complete integrated structure. Along the first direction, the first flexible film layer 20 and the second flexible film layer 30 have no bending part and folded part, and are not cut or folded along with the bending of the conductive core 11. It is a structural design of the circuit board assembly 400 different from the related technology.

[0107] In the circuit board assembly of the present scheme, a plurality of conductive cores 11 are arranged, and at least one conductive core 11 is bent to form a first bending portion 112, so as to form a conductive core layer 10, and then the conductive core layer 10 is sandwiched between the first flexible film layer 20 and the second flexible film layer 30, so that the production cycle can be improved, the production and manufacturing scheme is simple, and after the manufacturing is completed, it can be directly put into the wiring harness isolation plate assembly 130 for use, and there is no need to trim, cut or even bend the circuit board assembly 400 on site during the assembly process of the wiring harness isolation plate assembly 130. The method of use is simple, which significantly simplifies the manufacture and assembly of the sampling scheme, and can effectively improve the assembly efficiency of the wiring harness isolation plate assembly 130.

[0108] According to some embodiments of the present application, Figure 7-Figure 8As shown, along the thickness direction of the conductive core 11, there is no overlapping area between the projection of the first bending portion 112 of a conductive core 11 and the projection of the main body 111, that is, in this embodiment, the bending method of the first bending portion 112 is not achieved by folding the first bending portion 112 and the main body 111 of a conductive core 11, and the bending direction of the first bending portion 112 relative to the main body 111 is the second direction. Compared with the solution of folding in half to change the routing direction of the conductive core 11, the solution of this embodiment can effectively reduce the angle range required for the first bending portion 112 to be bent, greatly reduce the stress on the conductive core 11 in the bending area, and can extend the service life and stability of the conductive core 11 to a certain extent.

[0109] At the same time, after the first bending portion 112 is bent toward the second direction relative to the main body portion 111, in the thickness direction of the conductive wire core layer 10, the thickness of the first bending portion 112 and the thickness of the main body portion 111 are roughly corresponding in value and position, and there will be no situation where the thickness of the first bending portion 112 and the main body portion 111 overlap in some positions, which can further improve space utilization and reduce the overall thickness of the conductive wire core layer 10.

[0110] According to some embodiments of the present application, the structure of each conductive wire core 11 can be a flat cable structure, so that the overall thickness of the conductive wire core layer 10 can be effectively controlled. Along the projection of the thickness direction of the conductive wire core layer 10, the projections of the first flexible film layer 20 and the second flexible film layer 30 are both roughly rectangular, and most of the structure of the conductive wire core layer 10 falls within the projection of the first flexible film layer 20 and the second flexible film layer 30, and only a portion of the first bending portion 112 and / or a portion of the sampling terminal 40 protrude outside the first flexible film layer 20 and the second flexible film layer 30.

[0111] Compared with the existing solution of cutting the flat cable, the cutting here needs to cut the upper film layer and the lower film layer covering the core, and then fold the conductive core 11 and the upper film layer and the lower film layer covering the core at a certain angle before bending and leading out. In this embodiment, the first flexible film layer 20 and the second flexible film layer 30 have no bending part and folded part, and neither bends with the bending of the conductive core 11, which is a structural design of the circuit board assembly 400 different from the related art. The production and manufacturing scheme of the circuit board assembly 400 in this embodiment is simple, and it can be directly put into the wire harness isolation plate assembly 130 for use after manufacturing. There is no need to trim, cut or even bend the circuit board assembly 400 on site during the assembly process of the wire harness isolation plate assembly 130. The method of use is simple, which significantly simplifies the manufacturing and assembly of the sampling scheme, and can effectively improve the assembly efficiency of the wire harness isolation plate assembly 130.

[0112] According to some embodiments of the present application, the thickness direction, the first direction, and the second direction of the conductive wire core layer 10 are perpendicular to each other.

[0113] like Figure 5-Figure 6 As shown, the first direction is the length direction of the main body 111, that is, the X direction, the second direction is the length direction of the first bending portion 112, that is, the Y direction and the Y′ direction, and the thickness direction of the conductive wire core layer 10 is the Z direction.

[0114] In the above technical solution, on the one hand, since the main body 111 and the first bending portion 112 extend toward the first direction and the second direction respectively, the first direction and the second direction are made perpendicular to each other, which facilitates the arrangement of the main body 111 and the first bending portion 112. On the other hand, by making the thickness direction of the conductive wire core layer 10 perpendicular to both the first direction and the second direction, the dimension of the conductive wire core layer 10 in the thickness direction can be effectively controlled and reduced, and along the thickness direction of the conductive wire core layer 10, the first flexible film layer 20, the conductive wire core layer 10 and the second flexible film layer 30 are arranged in sequence and compactly, which is beneficial to improving the energy density of the battery 100.

[0115] According to some embodiments of the present application, along the first direction, at least one first bending portion 112 is provided with a first groove 51 and a second groove 52 on both sides thereof;

[0116] Along the thickness direction of the conductive wire core layer 10 , the first groove 51 and the second groove 52 both penetrate the first flexible film layer 20 and the second flexible film layer 30 ;

[0117] Along the second direction, the opening of the first groove 51 and the opening of the second groove 52 are both oriented toward the side where the sampling terminal 40 connected to the corresponding first bending portion 112 is located.

[0118] like Figure 6 , Figure 8-Figure 9 As shown, along the first direction (i.e., the X direction), at least one first bending portion 112 is provided with a first groove 51 and a second groove 52 on both sides, respectively. This means that when there are multiple first bending portions 112, only one first bending portion 112 may be provided with a first groove 51 and a second groove 52 on both sides, or some of the first bending portions 112 may be provided with a first groove 51 and a second groove 52 on both sides, or all of the first bending portions 112 may be provided with a first groove 51 and a second groove 52 on both sides.

[0119] It should be noted that when a first groove 51 and a second groove 52 are respectively provided on both sides of a first bending portion 112, in the X direction, there will be no other first bending portion 112 between the first groove 51 and the first bending portion 112, and there will be no other first bending portion 112 between the second groove 52 and the first bending portion 112.

[0120] Along the thickness direction of the conductive wire core layer 10 (i.e., the Z direction), the first groove 51 penetrates the first flexible film layer 20 and the second flexible film layer 30 at the same time, and the second groove 52 also penetrates the first flexible film layer 20 and the second flexible film layer 30 at the same time, that is, a part of the first groove 51 is opened on the first flexible film layer 20, and the remaining part is set on the second flexible film layer 30, and a part of the first groove 51 and the remaining part of the first groove 51 are opposite and connected in the thickness direction of the conductive wire core layer 10. Similarly, the arrangement relationship between the second groove 52 and the first flexible film layer 20 and the second flexible film layer 30 corresponds to the above description of the first groove 51, and will not be elaborated here.

[0121] At the same time, along the second direction (i.e., the Y direction and the Y' direction), the opening of the first groove 51 and the opening of the second groove 52 are both oriented toward the side where the sampling terminal 40 connected to the corresponding first bending portion 112 is located, that is, the first groove 51 and the second groove 52 each have a groove bottom and two groove walls connected to the groove bottom and opposite to each other in the first direction, the two groove walls of the first groove 51 are spaced apart from the end of the groove bottom to form the opening of the first groove 51, and the two groove walls of the second groove 52 are spaced apart from the end of the groove bottom to form the opening of the second groove 52.

[0122] The openings of each group of first grooves 51 and second grooves 52 are determined by the positions of the corresponding sampling terminals 40 , that is, when there are two groups of first grooves 51 and second grooves 52 , the opening directions of the two groups of first grooves 51 and second grooves 52 along the second direction may be the same or different.

[0123] In the above scheme, if Figure 6 As shown, the existence of the first groove 51 and the second groove 52 allows the first flexible film layer 20 and the second flexible film layer 30 to form a movable tongue that can be displaced in a first direction between each group of the first groove 51 and the second groove 52, so that the first bent portion 112 has a certain movable amount in the first direction, reducing the influence of the expansion of the battery cell 120 on the sampling terminal 40, and can further meet the expansion requirements of the battery 100.

[0124] In some embodiments, a plurality of battery cells 120 may be arranged along a first direction to form a battery pack. When a battery cell 120 expands, the first bending portion 112 , the sampling terminal 40 and the movable tongue may all move a certain distance along the first direction to accommodate the displacement of the battery cell 120 .

[0125] According to some embodiments of the present application, along the thickness direction of the conductive core layer 10 , the projection of the first bending portion 112 of at least one conductive core 11 overlaps with the projection of at least one of the other conductive cores 11 ;

[0126] The circuit board assembly 400 further includes a bridging insulating film 60 . Along the thickness direction of the conductive core layer 10 , at least a portion of the bridging insulating film 60 is disposed between the first bending portion 112 and the conductive core 11 corresponding to the overlapped projections.

[0127] like Figure 7 and Fig.11 As shown, at least a portion of the bridging insulating film 60 is disposed between the first bending portion 112 and the conductive core 11 corresponding to the overlapping projection, that is, a portion of the bridging insulating film 60 can also insulate the main body 111 connected to the first bending portion 112 and other conductive cores 11 to improve the insulation success rate.

[0128] In the above technical solution, the conductive core 11 is only used for conducting electricity, and there is no insulating structure outside. Multiple conductive cores 11 are arranged at intervals to achieve insulation. Since the first bending portion 112 needs to extend away from the main body 111 along the second direction, along the thickness direction of the conductive core layer 10, the projection of the first bending portion 112 of at least one conductive core 11 overlaps with the projection of at least one of the other conductive cores 11, and it is necessary to perform insulation treatment between the structures with overlapping projections. In order to control the overall thickness of the circuit board assembly 400, this solution performs insulation treatment between the first bending portion 112 with overlapping projections and the conductive core 11 by setting a bridging insulating film 60.

[0129] Specifically: along the thickness direction of the conductive core layer 10, at least part of the bridging insulating film 60 is disposed between the first bending portion 112 corresponding to the overlapped projection and the conductive core 11. Under the action of the bridging insulating film 60, any one of the conductive cores 11 can be bent and led out first. In other words, along the spacing arrangement direction of the plurality of conductive cores 11 (i.e., the Y direction and the Y' direction in the figure), the conductive core 11 having the first bending portion 112 can be disposed in the middle of the conductive core layer 10, and can cross over other conductive cores 11 and be connected to the sampling terminal 40 first.

[0130] It should be noted that, along the thickness direction of the conductive core layer 10, the projection of the first bending portion 112 of at least one conductive core 11 overlaps with the projection of at least one of the other conductive cores 11, which may refer to the first bending portion 112 overlapping with the main body 111 of the other conductive core 11, or the first bending portion 112 overlapping with the first bending portion 112 of the other conductive core 11. Figure 8 and Fig.11 As shown in the conductive core 11 , along the Z direction and the Z′ direction, the projection of the first bending portion 112 of the conductive core 11 overlaps with the projection of the main body of another conductive core 11 .

[0131] On the other hand, no matter how many first bending portions 112 cross-connect with other conductive cores 11 in the path extending to the sampling terminal 40, that is, no matter how many bridging insulating films 60 there are, along the thickness direction of the conductive core layer 10, the thickness of the bridging insulating film 60 and the thickness of the first bending portions 112 distributed on both sides of the bridging insulating film 60 are substantially the same as the thickness of other conductive cores 11, and the positions of the bridging insulating films 60 arranged at different positions along the first direction are also substantially the same. Therefore, when there are multiple bridging insulating films 60, there will be no significant impact on the overall thickness of the circuit board assembly 400, and the overall thickness of the circuit board assembly 400 changes slightly.

[0132] According to some embodiments of the present application, the conductive core 11 includes a first conductive core 113 , the sampling terminal 40 includes a voltage sampling terminal 41 , and the first bent portion 112 of the first conductive core 113 is connected to the voltage sampling terminal 41 ;

[0133] Among them, the voltage sampling terminal 41 includes a first part 411, a second part 412 and a fuse part 413 connecting the first part 411 and the second part 412, the first part 411 is connected to the first bending part 112, the second part 412 is used to connect the bus 132, and the overcurrent cross-sectional area of ​​the first part 411 and the overcurrent cross-sectional area of ​​the second part 412 are both larger than the overcurrent cross-sectional area of ​​the fuse part 413.

[0134] The voltage sampling terminal 41 is a structural component for electrically connecting to the busbar 132 of the battery 100 to collect voltage information of the battery 100 .

[0135] The first conductive core 113 is connected to the voltage sampling terminal 41 correspondingly. Specifically, the first bent portion 112 of the first conductive core 113 is connected to the voltage sampling terminal 41 .

[0136] The fuse part 413 is a structural component for overload protection. The fuse part 413 is configured to respond to the current and fuse when the current reaches a preset value. When an abnormal situation such as a short circuit occurs in the voltage sampling, the connection between the first part 411 and the second part 412 is disconnected.

[0137] The cross-sectional area for current flow refers to the area of ​​the cross section perpendicular to the direction of current flow.

[0138] In the above technical solution, if Figure 9-10 As shown, the voltage sampling terminal 41 includes a first portion 411, a second portion 412, and a fuse portion 413 connecting the first portion 411 and the second portion 412. The first portion 411 is connected to the first bending portion 112, and the second portion 412 is used to connect the wiring harness isolation plate assembly 130 or the busbar 132 of the battery 100. The cross-sectional area of ​​the first portion 411 and the cross-sectional area of ​​the second portion 412 are both greater than the cross-sectional area of ​​the fuse portion 413.

[0139] Compared with the first part 411 and the second part 412, the current cross-sectional area of ​​the fuse part 413 is smaller. When the current abnormally rises to a certain value and the temperature of the fuse part 413 rises to a certain level, the fuse part 413 can melt itself to cut off the current, thereby protecting the safe operation of the circuit.

[0140] According to some embodiments of the present application, the fuse part 413 may be configured to be a long and narrow structure, so as to achieve the technical effect that the fuse part 413 has a small cross-sectional area for current flow and can quickly respond to a sampling short circuit and fuse.

[0141] According to some embodiments of the present application, along the thickness direction of the conductive wire core layer 10 , the projection area of ​​the first portion 411 is smaller than the projection area of ​​the second portion 412 .

[0142] In the above technical solution, the first part 411 is connected to the first bending part 112, and the second part 412 is connected to the wiring harness isolation plate assembly 130 or the busbar 132 of the battery 100. Along the thickness direction of the conductive wire core layer 10, the projection area of ​​the first part 411 is smaller than the projection area of ​​the second part 412. The projection area of ​​the second part 412 is larger, so that the connection area between the second part 412 and the busbar 132 can also be larger. The projection area of ​​the first part 411 is smaller than the projection area of ​​the second part 412, so that the current cross-sectional area of ​​the first part 411 can also be smaller. When the current is conducted from the first part 411 to the first bending part 112, the difference in the current cross-sectional area is smaller, and the conducted current and voltage signals can be more stable.

[0143] According to some embodiments of the present application, the circuit board assembly 400 also includes a first insulating film layer 71 and a second insulating film layer 72. Along the thickness direction of the conductive wire core layer 10, the first part 411, the fuse part 413 and part of the second part 412 are sandwiched between the first insulating film layer 71 and the second insulating film layer 72.

[0144] The first insulating film layer 71 and the second insulating film layer 72 are both insulating material pieces, which are used to insulate and protect the non-sampling part of the voltage sampling terminal 41. In some embodiments, the first insulating film layer 71 and the second insulating film layer 72 can also be used to insulate and protect one end of the first bending portion 112 connected to the sampling terminal 40.

[0145] In the above technical solution, if Figure 5 and Figure 7As shown, the first insulating film layer 71, the second insulating film layer 72 cooperate with the first flexible film layer 20 and the second flexible film layer 30 to provide an insulating coating for the non-sampling portion of the voltage sampling terminal 41 and the conductive wire core layer 10, and also provide an insulating coating for the connection portion between the voltage sampling terminal 41 and the first bending portion 112. The end of the second portion 412 away from the fuse portion 413 needs to extend out of the first insulating film layer 71 and the second insulating film layer 72.

[0146] Along the thickness direction of the conductive core layer 10 , the first insulating film and the first flexible film layer 20 are located on one side of the conductive core layer 10 , and the second insulating film and the second flexible film layer 30 are located on the other side of the conductive core layer 10 .

[0147] It should be noted that the first insulating film and the first flexible film layer 20 may be an integral structure, or the first insulating film may be an independent structure. Similarly, the second insulating film and the second flexible film layer 30 may be an integral structure, or the second insulating film may be an independent structure.

[0148] According to some embodiments of the present application, the sampling terminal 40 further includes a temperature sampling terminal 42 , the conductive core 11 further includes a second conductive core 114 , and the first bending portion 112 of the second conductive core 114 is connected to the temperature sampling terminal 42 .

[0149] The temperature sampling terminal 42 is a structural component that contacts the battery 100 to collect temperature information of the battery 100 .

[0150] The second conductive wire core 114 is connected to the temperature sampling terminal 42 correspondingly. Specifically, the first bending portion 112 of the second conductive wire core 114 is connected to the temperature sampling terminal 42 .

[0151] It should be noted that the conductive core 11 is divided into a first conductive core 113 and a second conductive core 114 in the present application for the purpose of facilitating the understanding of the definition of the conductive core 11 connected to the voltage sampling terminal 41 and the conductive core 11 connected to the temperature sampling terminal 42. In essence, the material and internal structural properties of the first conductive core 113 and the second conductive core 114 are basically the same.

[0152] According to some embodiments of the present application, the second conductive core 114 also includes a second bending portion 115, the second bending portion 115 extends out of the first flexible film layer 20 and the second flexible film layer 30, one end of the second bending portion 115 is connected to the first bending portion 112, and the other end of the second bending portion 115 is connected to the temperature sampling terminal 42; an angle is formed between the first bending portion 112 and the second bending portion 115 of the second conductive core 114.

[0153] like Figure 5 and Figure 7As shown, the first bending portion of the second conductive core 114 allows it to bend in the second direction, and the second bending portion 115 of the second conductive core 114 can make the portion of the second conductive core 114 extending out of the first flexible film layer 20 and the second flexible film layer 30 change the routing direction again, and can also change the posture, position and angle of the temperature sampling terminal 42.

[0154] In the above technical solution, in order to facilitate the position arrangement and adjustment of the temperature sampling terminal 42 and adapt to various arrangement schemes of the battery 100, the second conductive wire core 114 also includes a second bending portion 115, the second bending portion 115 extends out of the first flexible film layer 20 and the second flexible film layer 30, one end of the second bending portion 115 is connected to the first bending portion 112, and the other end of the second bending portion 115 is connected to the temperature sampling terminal 42; there is an angle between the first bending portion 112 and the second bending portion 115 of the second conductive wire core 114, so as to realize the secondary bending of the second conductive wire core 114, and the position of the temperature sampling terminal 42 can be adjusted in multiple directions. In addition, since the second bending portion 115 is provided, and the temperature sampling terminal 42 is provided at one end of the second bending portion 115 away from the first bending portion 112, the temperature sampling terminal 42 can have a certain amount of mobility, thereby reducing the influence of the expansion of the battery cell 120 on the temperature sampling terminal 42.

[0155] According to some embodiments of the present application, the circuit board assembly 400 further includes a connector 80 , which is connected to an end of the body portion 111 away from the first bending portion 112 .

[0156] The connector 80 is a structural component used to transmit the data respectively collected by the plurality of conductive cores 11 of the conductive core layer 10 to the outside of the circuit board assembly 400 .

[0157] In the above technical solution, for the conductive wire core 11 having the first bending portion 112, the connector 80 is connected to the end of the main body 111 away from the first bending portion 112, and the setting position of the connector 80 is determined. For the conductive wire core 11 without the first bending portion 112, the end of the conductive wire core 11 close to the connector 80 is naturally used for electrical connection with the connector 80.

[0158] In other words, the connector 80 is connected to the end of the conductive wire core layer 10 corresponding to the main body portion 111 away from the first bending portion 112 .

[0159] According to some embodiments of the present application, the connector 80 is provided with a support plate 81 and a connector body 82 protruding from the support plate 81, and a plurality of slots 821 are provided on the connector body 82, wherein the second flexible membrane layer 30 is overlapped on the support plate 81, and a plurality of conductive cores 11 are arranged one by one in a slot 821 and electrically connected to the connector body 82, and the connector body 82 is used to transmit the sampling signal to an external acquisition device.

[0160] According to some embodiments of the present application, the circuit board assembly 400 can be formed by hot pressing. Specifically, the first flexible film layer 20, the conductive wire core layer 10 and the second flexible film layer 30 are connected as a whole by hot pressing, and adhesive is provided between each two of the three-layer structure of the first flexible film layer 20, the conductive wire core layer 10 and the second flexible film layer 30.

[0161] According to some embodiments of the present application, Figure 3-Figure 4 As shown, the present application also provides a wiring harness isolation plate assembly 130, including the circuit board assembly 400 in the above embodiment, the circuit board assembly 400 is pre-assembled with other structures of the wiring harness isolation plate assembly 130 to obtain the wiring harness isolation plate assembly 130, and the circuit board assembly 400 realizes the function of sampling signals.

[0162] like Figure 3 As shown, the wire harness isolation plate assembly 130 may also be referred to as a CCS assembly or a sampling assembly in some occasions, and its functions mainly include insulating the side where the electrode output terminal of a battery cell 120 group or a battery 100 including multiple battery cells 120 is located, encapsulating the battery 100 together with the end plate assembly, sampling signals, etc. The wire harness isolation plate assembly 130 is also a functional component for electrically connecting multiple battery cells 120 into one. Multiple battery cells 120 are connected in series, in parallel, or in mixed connection through the wire harness isolation plate assembly 130 to output the electrical energy of the battery cell 120 group.

[0163] According to some embodiments of the present application, the wiring harness isolation plate assembly 130 includes a wiring harness plate 131, such as Figure 3 As shown, the harness plate 131 is an important structure of the harness isolation plate assembly 130 , is a base for arranging other important components such as the busbar 132 , the circuit board assembly 400 , etc., and is also a component that directly contacts the battery cell 120 .

[0164] The wiring harness isolation plate assembly 130 includes a busbar 132, which is electrically connected to the electrode terminals of the battery cells 120, and is used to realize electrical connection between multiple battery cells 120, such as series connection, parallel connection, or hybrid connection, to output the electrical energy of the battery 100. Figure 3 and Figure 4 As shown, the busbar 132 is used to electrically connect two adjacent battery cells 120 in series.

[0165] According to some embodiments of the present application, Figure 2 As shown, the present application also provides a battery 100, including the circuit board assembly 400 in the above embodiment or the wire harness isolation plate assembly 130 in the above embodiment.

[0166] According to some embodiments of the present application, Figure 1 As shown, the present application also provides an electrical device, including the battery 100 in the above embodiment, and the battery 100 is used to provide electrical energy.

[0167] According to some embodiments of the present application, Figure 5-Figure 6 As shown, the present application provides a circuit board assembly 400 , which is a novel flat cable structure, including a conductive wire core layer 10 , a sampling terminal 40 , a first flexible film layer 20 , a second flexible film layer 30 and a connector 80 .

[0168] like Figure 7-Figure 8 As shown, the conductive wire core layer 10 includes a plurality of conductive wire cores 11. As shown in the figure, the conductive wire core layer 10 includes 7 conductive wire cores 11 spaced apart along the second direction. Each conductive wire core 11 is a bent structure, and includes a main body 111 and a first bent portion 112 connected to the main body 111. The main body 111 is located between the first flexible film layer 20 and the second flexible film layer 30 and extends along the first direction. The first bent portion 112 extends along the second direction. One end of the first bent portion 112 away from the main body 111 is connected to the sampling terminal 40. The angle between the first direction and the second direction is 90°.

[0169] The first flexible film layer 20 and the second flexible film layer 30 are both insulating parts, and the bending of the conductive core 11 has nothing to do with the first flexible film layer 20 and the second flexible film layer 30, that is, the first flexible film layer 20 and the second flexible film layer 30 will not bend due to the bending of the conductive core 11. Along the thickness direction of the conductive core layer 10, the first flexible film layer 20 and the second flexible film layer 30 are arranged opposite to each other and sandwich the conductive core layer 10. After the conductive core 11 is bent, the first flexible film layer 20, the conductive core layer 10 and the second flexible film layer 30 are crimped and formed, and the structure obtained by the molding is the structure that is finally put into the assembly of the wire harness isolation plate assembly 130. There is no need to cut the first flexible film layer 20 and the second flexible film layer 30 later, and there is no need to bend the crimped first flexible film layer 20, the conductive core layer 10 and the second flexible film layer 30.

[0170] The conductive core 11 may be a flat copper wire structure. Each conductive core 11 is formed by bending and is used for sampling the battery 100 packages, which simplifies the sampling scheme and can reduce the cost of the scheme.

[0171] The sampling terminal 40 includes a temperature sampling terminal 42 and five voltage sampling terminals 41. The temperature sampling terminal 42 is an NTC (Negative Temperature Coefficient thermistor), that is, a negative temperature coefficient thermistor. The conductive core 11 includes a first conductive core 113 and a second conductive core 114. After the second conductive core 114 is bent, one NTC needs to be pressed and welded with two second conductive cores 114 to form a loop. The NTC contacts the bus 132 or the top cover of the battery 100 to achieve temperature sampling connection. After each first conductive core 113 is bent, it is welded to the corresponding voltage sampling terminal 41, and then the voltage sampling terminal 41 is welded to the bus 132 to achieve voltage sampling.

[0172] like Fig.11 As shown, one end of the main body 111 of each conductive core 11 away from the first bending portion 112 is in contact with the connector 80 (pressed or welded), thereby completing the assembly of the circuit board assembly 400 and realizing the voltage sampling and temperature sampling functions.

[0173] like Figure 8 and Fig. 9 As shown, the present application also makes a design improvement on the structure of the voltage sampling terminal 41. As shown in the figure, the voltage sampling terminal 41 includes a first part 411, a fuse part 413 and a second part 412 connected in sequence. The first part 411 is used to connect the first bending part 112 of the first conductive core 113. The first part 411 and the second part 412 are made of copper. The size of the first part 411 is smaller than that of the second part 412, and the first insulating film layer 71 and the second insulating film layer 72 are covered on both sides of the thickness direction of the voltage sampling terminal 41. Except for the second part 412 used for welding with the busbar 132, the voltage sampling terminal 41 is sandwiched between the first insulating film layer 71 and the second insulating film layer 72 to achieve insulation protection. When the sampling circuit of the battery 100 is short-circuited, the fuse part 413 self-fuse to protect the circuit loop and components.

[0174] like Fig.10 As shown, in order to facilitate the conductive core 11 located in the middle to be bent first and connected to the sampling terminal 40, if one conductive core 11 is bent first compared with the conductive cores 11 on both sides, there will inevitably be a cross-over overlap between the first bent portion and the other main body portions 111. In the present application, a jumper insulating film 60 is provided at the cross-over overlap position of the jumper, the first bent portion and the other main body portions 111 to electrically isolate the conductive cores 11 that are overlapped in the thickness direction of the conductive core layer 10.

[0175] like Figure 9-10As shown, considering that the battery cell 120 inside the battery 100 may expand when the battery 100 is actually working, the battery cell 120 may have a certain size change in all directions. In order to match the expansion of the battery 100, the position of the sampling terminal 40 also needs to meet the requirement of a certain displacement. In this embodiment, since the voltage sampling terminal 41 needs to be fixedly connected to the bus 132, the voltage sampling terminal 41 needs to have a certain displacement corresponding to the bus 132 and the battery 100 to match the expansion of the battery 100. Along the first direction (i.e., the X direction), the first groove 51 and the second groove 52 are respectively provided on both sides of the first bending portion 112 of the first conductive wire core 113. Along the thickness direction of the conductive wire core layer 10, the first groove 51 and the second groove 52 both penetrate the first flexible film layer 20 and the second flexible film layer 30; along the second direction, the opening of the first groove 51 and the opening of the second groove 52 are both facing the side where the sampling terminal 40 connected to the corresponding first bending portion 112 is located. The existence of the first groove 51 and the second groove 52 enables the first flexible film layer 20 and the second flexible film layer 30 as a whole to form a movable tongue piece that can be displaced to a certain extent in each direction between each group of the first groove 51 and the second groove 52, so that the first bent portion 112 of the first conductive core 113 has a certain movable amount in each direction, and then the voltage sampling terminal 41 can also move with the expansion of the battery 100, which can meet the expansion requirements of the battery 100.

[0176] Along the first direction, the first groove 51 and the second groove 52 may be designed on both sides of the first bending portion 112 of the second conductive core 114 , or the first groove 51 and the second groove 52 may not be designed.

[0177] The circuit board assembly 400 of the present application is fully applicable to the sampling of the battery 100, and has a simple process, low manufacturing cost, and low sampling difficulty. The production and manufacturing scheme of the circuit board assembly 400 of the present application is simple, and it can be directly put into the wire harness isolation plate assembly 130 after manufacturing. There is no need to cut, cut or even bend the circuit board assembly 400 on site during the assembly process of the wire harness isolation plate assembly 130. The method of use is simple, which significantly simplifies the manufacturing and assembly of the sampling scheme, and can effectively improve the assembly efficiency of the wire harness isolation plate assembly 130. The circuit board assembly 400 can meet the requirements of the various parts of the circuit board assembly 400 in the expanded state of the battery 100 to adjust the position adaptively, and also improve the connection stability between the conductive wire core 11 and the sampling terminal 40. It can effectively reduce the difficulty of sampling and reduce the cost of the sampling scheme. In addition, the thickness of the first flexible film layer 20 and the second flexible film layer 30 are both thin, so that the overall thickness of the circuit board assembly 400 can be effectively controlled, and when applied to the sampling of the battery 100, it can effectively control or even improve the energy density of the battery 100.

[0178] Although the present application has been described with reference to preferred embodiments, various modifications may be made thereto and parts thereof may be replaced with equivalents without departing from the scope of the present application. In particular, the various technical features mentioned in the various embodiments may be combined in any manner as long as there are no structural conflicts. The present 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 circuit board assembly, characterized in that: include: A conductive wire core layer, comprising a plurality of conductive wire cores; A first flexible film layer and a second flexible film layer, along the thickness direction of the conductive wire core layer, the first flexible film layer and the second flexible film layer are arranged opposite to each other and sandwich the conductive wire core layer; Sampling terminal; Among them, at least one of the conductive cores includes a main body and a first bending portion connected to the main body, the main body is located between the first flexible film layer and the second flexible film layer and extends along a first direction, the first bending portion extends along a second direction, an end of the first bending portion away from the main body is connected to the sampling terminal, and an angle is formed between the first direction and the second direction.

2. The circuit board assembly according to claim 1, characterized in that: Along the thickness direction of the conductive core layer, the first flexible film layer is located on one side of the main body and the first bending portion in the same direction, and the second flexible film layer is located on the other side of the main body and the first bending portion in the same direction.

3. The circuit board assembly according to claim 1 or 2, characterized in that: The thickness direction of the conductive wire core layer, the first direction and the second direction are perpendicular to each other.

4. The circuit board assembly according to claim 1 or 2, characterized in that: Along the first direction, at least one of the first bending portions is provided with a first groove and a second groove on both sides thereof; Along the thickness direction of the conductive wire core layer, the first groove and the second groove both penetrate the first flexible film layer and the second flexible film layer; Along the second direction, the opening of the first groove and the opening of the second groove are both oriented toward the side where the sampling terminal connected to the corresponding first bending portion is located.

5. The circuit board assembly according to claim 1 or 2, characterized in that: Along the thickness direction of the conductive core layer, a projection of the first bending portion of at least one of the conductive cores overlaps with a projection of at least one of the other conductive cores; The circuit board assembly further comprises a bridging insulating film, and along the thickness direction of the conductive core layer, at least a portion of the bridging insulating film is disposed between the first bending portion and the conductive core corresponding to the overlapping projection.

6. The circuit board assembly according to claim 1 or 2, characterized in that: The conductive wire core includes a first conductive wire core, the sampling terminal includes a voltage sampling terminal, and the first bending portion of the first conductive wire core is connected to the voltage sampling terminal; Among them, the voltage sampling terminal includes a first part, a second part and a fuse part connecting the first part and the second part, the first part is connected to the first bending part, the second part is used to connect the bus, and the overcurrent cross-sectional area of ​​the first part and the overcurrent cross-sectional area of ​​the second part are both larger than the overcurrent cross-sectional area of ​​the fuse part.

7. The circuit board assembly according to claim 6, wherein: Along the thickness direction of the conductive wire core layer, a projection area of ​​the first portion is smaller than a projection area of ​​the second portion.

8. The circuit board assembly according to claim 6, wherein: The circuit board assembly further includes a first insulating film layer and a second insulating film layer. Along the thickness direction of the conductive core layer, the first portion, the fuse portion and part of the second portion are sandwiched between the first insulating film layer and the second insulating film layer.

9. The circuit board assembly according to claim 1 or 2, characterized in that: The sampling terminal further includes a temperature sampling terminal, and the conductive wire core further includes a second conductive wire core, and the first bending portion of the second conductive wire core is connected to the temperature sampling terminal.

10. The circuit board assembly according to claim 9, wherein: The second conductive core further includes a second bending portion, and the second bending portion extends out of the first flexible film layer and the second flexible film layer; One end of the second bending portion is connected to the first bending portion, and the other end of the second bending portion is connected to the temperature sampling terminal; an angle is formed between the first bending portion and the second bending portion of the second conductive core.

11. The circuit board assembly according to claim 1 or 2, characterized in that: The circuit board assembly further includes a connector connected to an end of the main body away from the first bending portion.

12. A wiring harness isolation plate assembly, characterized in that: A circuit board assembly comprising any one of claims 1-11.

13. A battery, characterized in that: The invention comprises the circuit board assembly according to any one of claims 1 to 11 or the wire harness isolation plate assembly according to claim 12.

14. An electrical device, characterized in that: The battery according to claim 13 is used to provide electrical energy.

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