Battery device and battery pack

Abstract

Battery device, characterized in that it comprises the following: a main wiring harness (1) in which several wires are provided, the wires being electrically connected to a battery; an output terminal (2) located at at least one end of the main wiring harness (1), wherein the output terminal (2) is directly electrically connected to a battery management assembly; An adapter circuit board arranged between the main wiring harness (1) and the output terminal (2), wherein a signal input port of the adapter circuit board is electrically connected to the main wiring harness (1) and a signal output port is electrically connected to the output terminal (2), wherein an output branch (3) is arranged between the adapter circuit board and the output terminal (2), the ratio of the thickness of the adapter circuit board to the length of the output branch (3) along its extension direction is in the range of 0.003 to 0.06, and the output terminal (2) is provided at at least one end of the main wiring harness (1); wherein the output terminal (2) has multiple pins and the number of pins of the output terminal (2) should be greater than or equal to the number of wires of the main wiring harness (1).

Description

Technical area

[0001] The present utility model relates to the technical field of batteries for new energy and discloses a battery device and a battery pack. Background technology

[0002] With the continuous development of new energy technologies, batteries for new energy are finding widespread application as environmentally friendly energy storage and delivery devices in energy storage systems such as hydropower, thermal, wind and solar power plants, as well as in numerous technical fields such as power tools, electric bicycles, electric motorcycles, electric vehicles, military equipment and aerospace.

[0003] Flexible printed circuits (FPCs) are a key component of new energy batteries. Compared to traditional wiring harnesses, FPCs offer significant advantages in terms of safety, process flexibility, and automated production. The output terminal of an FPC typically needs to be connected to a battery management assembly (e.g., a connector). However, due to a mismatch between the pin sequence of the FPC output termination and the battery management assembly port, connecting the FPC circuit can be challenging. Contents of the invention

[0004] In light of this, the present utility model provides a battery device and a battery pack to address the problem of connection difficulties of the FPC in the prior art.

[0005] In a first aspect, the present utility model provides a battery device comprising the following: a main wiring harness in which several wires are provided, the cables are electrically connected to a battery; an output terminal located at at least one end of the main wiring harness, wherein the output terminal is directly electrically connected to a battery management assembly; an adapter circuit board arranged between the main wiring harness and the output terminal, wherein a signal input port of the adapter circuit board is electrically connected to the main wiring harness and a signal output port is electrically connected to the output terminal, wherein an output branch is arranged between the adapter circuit board and the output terminal and the ratio of the thickness of the adapter circuit board to the length of the output branch along its extension direction is in the range of 0.003 to 0.06.

[0006] Advantageous effects: In the battery device of the present utility model, the adapter circuit board is arranged between the main wiring harness and the output terminal, the signal input port of the adapter circuit board is electrically connected to the main wiring harness, and a signal output port is electrically connected to the output terminal, i.e.The main wiring harness is connected to the output terminal via the adapter board. The adapter board acts as a jumper adapter, integrating the jumper adapter of the main wiring harness. Following the jumper adapter, the pin sequence of the output terminal matches the pin sequence of the battery management system (BMS) port. This simplifies the circuit connection between the battery device's output terminal and the BMS port, reduces the overall connection structure, and minimizes the complexity of the connection between these components. Furthermore, the adapter board enhances the structural rigidity of the output terminal, facilitating a subsequent snap-fit ​​connection between the output terminal and the BMS port.The ratio of the thickness of the adapter circuit board to the length of the output branch along its extension direction is in the range of 0.003 to 0.06, and this ratio ensures better structural strength of the output terminal for connection to the battery management assembly port, which facilitates the connection process as well as the installation and arrangement of the electrical components.

[0007] In a second aspect, the present utility model provides a battery pack comprising a box body and the battery device described above, wherein the box body comprises a base plate, a frame and a box support, wherein the frame is provided around the edge of the base plate and forms a receiving chamber, wherein the box support is provided perpendicular to the base plate and is placed in the receiving chamber and the adapter circuit board of the battery device is provided on the box support.

[0008] Since the battery pack of the present utility model comprises the battery device of the present utility model and has the same advantageous effects as the battery device, details are not repeated here. Figures

[0009] To more clearly illustrate the specific embodiments of the present utility model and the prior art technical solutions, the figures necessary for use in these specific embodiments and the prior art description are briefly presented below. The figures described below obviously represent some embodiments of the present utility model. General technical personnel in this field can easily create further figures based on these figures without any creative effort. Fig. Figure 1 is a front view of the battery device (partial structure) of the present utility model; Fig. Figure 2 is a perspective schematic representation of the battery device (partial structure) of the present utility model; Fig. Figure 3 is an enlarged view of section A in Fig. 2. Reference symbols in the figures: 1 Main wiring harness; 2 output ports; 3. Exit branch; 4 upper cover plate; 5 lower cover plate; 6 box girders. Specific embodiments

[0010] To clarify the purpose, technical solution, and advantages of the embodiments of this utility model, the technical solutions in these embodiments are described clearly and completely below in conjunction with the accompanying drawings. It is evident that the described embodiments represent some of the embodiments of this utility model, not all of them. Based on the embodiments of this utility model, all further embodiments that a person skilled in the art would obtain without inventive activity fall within the scope of protection of this utility model.

[0011] The following are exemplary embodiments of the battery device and the battery pack of the present utility model with reference to the Fig. 1 to 3 described.

[0012] According to the embodiments of the present utility model, in one aspect a battery device is provided comprising: a main wiring harness 1, an output terminal 2 and an adapter circuit board, wherein the main wiring harness 1 provides several conductors, the conductors being electrically connected to a battery; wherein the output terminal 2 is arranged at at least one end of the main wiring harness 1, the output terminal 2 being directly electrically connected to a battery management assembly;wherein the adapter circuit board is arranged between the main cable harness 1 and the output terminal 2, wherein a signal input port of the adapter circuit board is electrically connected to the main cable harness 1 and a signal output port is electrically connected to the output terminal 2, wherein an output branch 3 is arranged between the adapter circuit board and the output terminal 2 and the ratio of the thickness of the adapter circuit board to the length of the output branch 3 along its extension direction is in the range of 0.003 to 0.06.

[0013] In this battery device, an adapter circuit board is arranged between the main wiring harness 1 and the output terminal 2; the signal input port of the adapter circuit board is electrically connected to the main wiring harness 1, and a signal output port is electrically connected to the output terminal 2.The main wiring harness 1 is connected to the output terminal 2 via the adapter circuit board. The adapter circuit board is designed as a jumper adapter board capable of implementing the jumper adapter of the main wiring harness 1. Following the jumper adapter of the adapter circuit board, the pin sequence of the output terminal 2 can match the pin sequence of the battery management module port. This simplifies the circuit connection between the output terminal 2 of the battery device and the battery management module port, simplifies the connection structure, and reduces the connection effort between the output terminal 2 of the battery device and the battery management module port. Furthermore, the adapter circuit board increases the structural rigidity of the output terminal 2, thus facilitating the subsequent snap-fit ​​connection of the output terminal 2 to the battery management module port.The ratio of the thickness of the adapter circuit board to the length of the output branch 3 along its extension direction is in the range of 0.003 to 0.06, and this ratio ensures better structural strength of the output terminal 2 for connection to the battery management assembly port, which facilitates the connection process as well as the installation and arrangement of the electrical components.

[0014] The battery device includes several batteries and FPCs, where FPCs are flexible printed circuit boards.

[0015] Main wiring harness 1 is the primary output wiring harness of the battery device, and it contains several wires that are electrically connected to the batteries and designed to acquire battery information. The wiring sequence of the wires in main wiring harness 1 is a prescribed or preset sequence. In this embodiment, main wiring harness 1 is a cable routing structure.

[0016] Output terminal 2 is the output port for the FPC's electrical signal, and output terminal 2 is located at at least one end of main harness 1, for example, at both ends or at one end. Output terminal 2 has multiple pins, and the number of pins at output terminal 2 should be greater than or equal to the number of wires in main harness 1. To achieve a compact design, in this embodiment, the number of pins at output terminal 2 corresponds to the number of wires in main harness 1. If main harness 1 were directly connected to output terminal 2, the pin sequence at output terminal 2 would be the same as that of the wires in main harness 1. However, in this embodiment, main harness 1 and output terminal 2 are not directly connected. Instead, main harness 1 is connected to output terminal 2 via an adapter board.

[0017] The adapter circuit board is located between the main cable harness 1 and the output terminal 2. The signal input port of the adapter circuit board is electrically connected to the main cable harness 1, and the signal output port is connected to the output terminal 2. The adapter circuit board has a specific thickness and hardness; its shape and dimensions can be freely selected and adjusted, and this example does not impose any restrictions in this regard.The signal input port of the adapter board is connected to the main wiring harness 1, so the pin sequence of the signal input port of the adapter board corresponds to that of the main wiring harness 1, and the adapter board is able to implement the jumper adapter of the main wiring harness 1, thereby changing the pin sequence. The signal output port of the adapter board is connected to the output terminal 2, and if the pin sequence of the signal output port of the adapter board is changed, the pin sequence of the output terminal 2 also changes.This means that the adapter circuit board is designed as a jumper adapter circuit board, which is able to implement the jumper adapter of the main wiring harness 1 and convert the pin sequence of the output terminal 2 into the pin sequence of the subsequent battery management assembly port, so that after the jumper adapter of the adapter circuit board the pin sequence of the output terminal 2 can match the pin sequence of the battery management assembly port, thereby facilitating the circuit connection between the output terminal 2 of the battery device and the battery management assembly port, simplifying the connection structure and reducing the connection effort between the output terminal 2 of the battery device and the battery management assembly port.

[0018] The adapter board is a printed circuit board, abbreviated PCB. In this embodiment, the adapter board is a rectangular board structure.

[0019] An output branch 3 is arranged between the adapter circuit board and the output terminal 2, wherein the output branch 3 is designed to connect the signal output port of the adapter circuit board to the output terminal 2 and ensures that the pin sequence of the output terminal 2 matches the pin sequence of the output terminal of the adapter circuit board.

[0020] In this embodiment, output branch 3 utilizes a flexible cable harness structure to facilitate the connection between the adapter circuit board and the output connector 2. Output branch 3 has a specific length. However, if output branch 3 is too long, it compromises the structural integrity of the output connector 2, making it difficult to secure output branch 3 and subsequently insert the output connector 2 into the connector. If output branch 3 is too short, the connection between the adapter circuit board and the output connector 2 is not facilitated, increasing operational complexity and negating the purpose of output branch 3.

[0021] When the output branch 3 is arranged, the output branch 3 is bent, and in the present application the length of the output branch 3 refers to the length of the output branch 3 along its extension direction, i.e. the total length of the output branch 3 after flattening.

[0022] The ratio of the adapter board thickness to the length of the output branch 3 along its direction of extension is in the range of 0.003 to 0.06. If the ratio of the adapter board thickness to the length of the output branch 3 along its direction of extension is too high, the adapter board is either too thick or the length of the output branch 3 along its direction of extension is too short. If the adapter board is too thick, it takes up too much space. If the length of the output branch 3 along its direction of extension is too short, this is detrimental to the conductor connection and complicates the connection process. If the ratio between the thickness of the adapter board and the length of the output branch 3 along its direction of extension is too low, the adapter board is either too thin or the output branch 3 is too long. If the adapter board is too thin, the structural strength is insufficient.If output branch 3 is too long, this is also detrimental to wiring and leads to rejects. If the thickness of the adapter board and the length of output branch 3 along its direction of extension satisfy the above relationship, the structural strength of the adapter board is better suited, which has a positive effect on wiring and saves space. At the same time, the structural strength of output end 2 is also relatively adequate, making it better suited for insertion into the battery management component connector, thus facilitating the insertion process and simplifying the installation and arrangement of the electrical components.

[0023] The length of output branch 3 along its extension direction is in the range of 50 mm to 150 mm, for example: 50 mm, 75 mm, 110 mm, 150 mm, etc. The thickness of the adapter circuit board is in the range of 0.5 mm to 3 mm, for example: 0.5 mm, 0.8 mm, 1 mm, 2.2 mm, 3 mm, etc.

[0024] Furthermore, the length of output branch 3 along its direction of extension is shorter than the length of main cable harness 1 along its direction of extension, and the width of output branch 3 is greater than the width of main cable harness 1.

[0025] In this embodiment, the length of the output branch 3 along its direction of extension is smaller than the length of the main cable harness 1 along its direction of extension, and the width of the output branch 3 is larger than the width of the main cable harness 1, so that the dimensions of the main cable harness 1 and the output branch 3 can meet the requirements of battery information acquisition, information transmission, etc., while saving space and manufacturing costs.

[0026] Furthermore, the direction of extension of the main cable harness 1 and the direction of extension of the output branch 3 are arranged at an angle, and the angle is in the range of 10° to 179°.

[0027] The signal input port of the adapter board is connected to the main cable harness 1, while the signal output port of the adapter board is connected to the output branch 3.

[0028] The adapter circuit board not only handles the jumper routing on the main cable harness 1, but also changes the wiring direction through the cable connection, thus rerouting the cable. This means that the direction of travel of the main cable harness 1 and the direction of travel of the output branch 3 are oriented at an angle to each other, eliminating the need for bending or additional mounting structures during wiring. This optimizes and simplifies wiring planning, saves installation space, and enables a compact design.

[0029] In this embodiment, the orientation of the main cable harness 1 and the orientation of the output branch 3 are coplanar, and the angle between them is in the range of 10° to 179°. For example, the angle between the orientation of the main cable harness 1 and the orientation of the output branch 3 can be 10°, 60°, 90°, 120°, 179°, etc. The specific angle can be determined according to spatial requirements, and this embodiment does not impose any restrictions in this regard.

[0030] In other embodiments, the direction of extension of the main cable harness 1 and the direction of extension of the output branch 3 lie in different planes. In this case, arranging the main cable harness 1 and the output branch 3 in different planes allows for a more flexible spatial arrangement of the main cable harness 1 and the output branch 3, which facilitates a compact arrangement of the overall structure and saves installation space. For example, the output branch 3 is arranged in a folded structure and comprises a first sub-branch and a second sub-branch that are connected sequentially. The first sub-branch of the output branch 3 is connected to the main cable harness 1 and runs perpendicular to the main cable harness 1, and the second sub-branch of the output branch 3 runs parallel to the main cable harness 1.

[0031] In other embodiments, the direction of extension of the main cable harness 1 runs parallel to the direction of extension of the output branch 3. Depending on the requirements of different wiring layouts, the direction of extension of the main cable harness 1 can also run parallel to the direction of extension of the output branch 3 to increase the flexibility of the wiring layout.

[0032] Furthermore, the hardness of the adapter circuit board is in the range of 80 HRM to 100 HRM.

[0033] The adapter board is a plate-shaped structure with electrical components mounted on it. In this embodiment, the adapter board is square and possesses a certain degree of structural hardness, which increases the structural strength of the output terminal 2. Insufficient hardness of the adapter board does not effectively increase the structural strength of the output terminal 2, while excessive hardness increases manufacturing costs and complexity. In this embodiment, the hardness of the adapter board is between 80 HRM and 100 HRM. Within this range, the hardness of the adapter board is moderate, effectively increasing the structural strength of the output terminal 2 without significantly increasing complexity or manufacturing costs.

[0034] In this embodiment, the hardness of the adapter circuit board can be between 80 HRM, 95 HRM and 100 HRM, etc.

[0035] Furthermore, the battery device also includes a protective assembly, wherein the protective assembly comprises an upper cover plate 4 and the upper cover plate 4 covers the adapter circuit board.

[0036] The protective assembly protects the adapter circuit board from damage caused by external influences or during operation. The protective assembly includes a top cover plate 4, which covers the adapter circuit board and protects its upper surface. This means that the top cover plate 4 covers the upper surface of the adapter circuit board, on which electrical components are typically arranged. The top cover plate 4 is able to protect these electrical components on the adapter circuit board from dust and water (condensation), thus ensuring the functionality of the adapter circuit board and, in turn, the proper operation of the entire circuit. Additionally, the top cover plate 4 increases the rigidity of the adapter circuit board, further improving the structural strength of the output branch 3 and the output terminal 2.

[0037] The shape and dimensions of the upper cover plate 4 should correspond to those of the adapter circuit board. In this embodiment, the adapter circuit board has a square plate structure; therefore, the upper cover plate 4 also has a square cover structure.

[0038] Furthermore, the protective assembly also includes a lower cover plate 5, wherein the lower cover plate 5 interacts with the upper cover plate 4 to form a receiving space in which the adapter circuit board is arranged.

[0039] To further protect the adapter circuit board, the protective assembly also includes a lower cover plate 5, which interacts with the upper cover plate 4 to form a receiving space in which the adapter circuit board is located. The lower cover plate 5 is able to cover the lower surface of the adapter circuit board, thus effectively protecting the lower surface as well. Furthermore, the lower cover plate 5 can interact with the upper cover plate 4 to form a receiving space for the adapter circuit board, so that the adapter circuit board is not entirely exposed and thus provides all-around protection for the adapter circuit board.

[0040] The shape and dimensions of the lower cover plate 3 should correspond to those of the adapter circuit board and the upper cover plate 4. In this embodiment, the adapter circuit board and the upper cover plate 4 both have a square plate structure; therefore, the lower cover plate 5 also has a square cover structure.

[0041] Optionally, the lower cover plate 5 and the upper cover plate 4 are detachably connected, for example, via a snap mechanism with a latch and slot. The latch is located on one side of the lower cover plate 5 or the upper cover plate 4, and the slot on the other side. The interlocking of the latch and slot creates a detachable connection between the lower and upper cover plates 5 and 4.

[0042] To simplify the structure and reduce manufacturing costs, the lower and upper cover plates 5 and 4 can of course also be detachably connected using fasteners such as screws.

[0043] To reduce the volume of the protective assembly and minimize the space requirement, the box structure formed by the connection of the lower and upper cover plates 5 and 4 is flat and completely encloses the adapter circuit board.

[0044] Furthermore, a safety element is provided on the adapter circuit board.

[0045] A fuse element is provided to protect the circuit connections and electrical components of the adapter circuit board, whereby the fuse element is able to effectively protect the adapter circuit board from damage or fire hazard due to excessive current and thus ensure the normal operation of the entire circuit.

[0046] Optionally, the fuse element is located near output terminal 2, meaning the distance between the fuse element on the adapter circuit board and output terminal 2 is relatively small. Positioning the fuse element in this way can reduce its response time, improve the protective effect on the adapter circuit board, and make the fuse element's protective function more reliable.

[0047] The safety element can be a conventional fuse, for example a fuse or a protective resistor, and this example does not impose any restrictions in this regard.

[0048] Furthermore, the length of the output branch 3 along its direction of extension is in the range of 50 mm to 150 mm.

[0049] An output branch 3 that is too long compromises the structural integrity of the output connector 2, makes its mounting and subsequent insertion into the connector more difficult, while an output branch 3 that is too short obstructs the connection between the adapter board and the output connector 2, increases the operating effort, and renders the installation of the output branch 3 pointless. In this embodiment, the length of the output branch 3 is between 50 mm and 150 mm. Within this length range, the output branch 3 is neither too long nor too short. The relatively appropriate length of the output branch 3 does not compromise the structural length of the output connector 2, facilitates its mounting and subsequent insertion into the connector, and also simplifies the connection between the adapter board and the output connector 2, thus simplifying operation.

[0050] The length of the output branch 3 can be 50 mm, 75 mm, 110 mm, 150 mm, etc.

[0051] As in Fig. Figure 3 further illustrates an embodiment comprising a box body and the battery device described above, wherein the box body comprises a base plate, a frame and a box support 6, wherein the frame is provided around the edge of the base plate and forms a receiving chamber, wherein the box support 6 is provided perpendicular to the base plate and is placed in the receiving chamber and the adapter circuit board of the battery device is provided on the box support 6.

[0052] This battery incorporates the battery device of this embodiment, and the adapter circuit board is capable of implementing the jumper adapter of the main wiring harness 1. Following the jumper adapter of the adapter circuit board, the pin sequence of the output terminal 2 can match the pin sequence of the battery management module port, thereby facilitating the circuit connection between the output terminal 2 and the battery management module port, simplifying the connection structure, and reducing the connection effort between the output terminal 2 of the battery device and the battery management module port. Furthermore, the adapter circuit board increases the structural rigidity of the output terminal 2, thus facilitating the subsequent snap-fit ​​connection of the output terminal 2 to the battery management module port.The ratio of the thickness of the adapter circuit board to the length of the output branch 3 along its extension direction is in the range of 0.003 to 0.06, and this ratio ensures better structural strength of the output terminal 2 for connection to the battery management assembly port, which facilitates the connection process as well as the installation and arrangement of the electrical components.

[0053] The box body serves as a support structure for the battery pack and possesses a certain degree of structural rigidity. The box body comprises a base plate, a frame, and a box support 6, the frame being designed around the edge of the base plate and forming a receiving chamber. The battery device is suitable for placement within this receiving chamber. Naturally, the battery in this embodiment also includes the electrical components and structures typical of existing batteries, which will not be discussed in detail here.

[0054] The box support 6 is positioned perpendicular to the base plate and placed in the receiving chamber. The box support 6 can be integrally formed with the base plate or installed detachably on the base plate. The adapter circuit board of the battery device is located within the box support 6 to facilitate the installation and securing of the battery device and to ensure a stable installation.

[0055] Since a section of the wiring harness near the output terminal 2 of the battery device's output branch 3 is not easily secured due to its high flexibility, and typically requires adhesive bonding, this can easily lead to the entire pack vibrating and oscillating during use, and the adhesive bond is prone to failure. This embodiment utilizes the greater thickness and strength of the adapter circuit board to secure it to the box support 6 (e.g., by gluing the adapter circuit board to the box support 6), thereby securing the battery device's output branch 3 near the output terminal 2 and ensuring a secure and reliable structure that is less susceptible to vibration and slippage.

[0056] Of course, the box girder 6 in the box body can also be equipped with further structural elements, which will not be discussed in detail here.

[0057] Furthermore, the protective assembly of the battery device is arranged on the upper end face of the box support 6 facing away from the base plate, such that the thickness of the adapter circuit board is in the range of 0.5 mm to 2 mm and the length of the output branch 3 along its extension direction is in the range of 50 mm to 120 mm.

[0058] The adapter circuit board is protected by a protective assembly located at the top of the box support 6, away from the base plate. This placement of the adapter circuit board and the protective assembly does not interfere with the installation of other electrical components, thus making efficient use of the available space.

[0059] In this case, the thickness of the adapter circuit board is in the range of 0.5 mm to 2 mm, e.g., 0.5 mm, 0.9 mm, 1.3 mm, and 2 mm. If the adapter circuit board is too thick, it occupies too much space in the housing in the longitudinal direction (vertically, in the Z-direction). If the adapter circuit board is too thin, its structural strength may be insufficient. Any adapter circuit board within this thickness range will not take up too much space in the housing in the longitudinal direction while still ensuring sufficient structural strength.

[0060] Furthermore, the length of output branch 3 along its direction of extension lies within the range of 50 mm to 120 mm, e.g., 50 mm, 70 mm, 105 mm, and 120 mm. If output branch 3 is too long, this impairs its structural strength and leads to rejects. If it is too short, this hinders the cable connection and increases the operating effort. The length of output branch 3 along its direction of extension lies within the aforementioned length range, which has a positive effect on wiring routing and also ensures structural strength.

[0061] Furthermore, the box support 6 divides the receiving chamber into a first chamber and a second chamber, wherein the electrical components are arranged in the first chamber and the batteries are arranged in the second chamber, and wherein the adapter circuit board is arranged on the side surface of the box support 6 and points towards the inside of the first chamber; and wherein the thickness of the adapter circuit board is in the range of 1 mm to 3 mm and the length of the output branch 3 along its extension direction is in the range of 50 mm to 150 mm.

[0062] In the box body, the box support 6 divides the interior of the box body into a first chamber and a second chamber, i.e., the box support 6 divides the receiving chamber into a first chamber and a second chamber, with the electrical components, such as battery management assemblies like BDU and BMS, being arranged in the first chamber, and the first chamber therefore also being referred to as the electrical chamber, while the individual batteries of the battery device are arranged in the second chamber, and the second chamber therefore also being referred to as the battery chamber.

[0063] As in Fig.As shown in Figure 3, the adapter circuit board is arranged on the side surface of the box girder 6 facing the first chamber. In particular, the larger surface of the adapter circuit board runs parallel to the side surface of the box girder 6, and the adapter circuit board is firmly connected to the side surface of the box girder 6, with the adapter circuit board facing the interior of the first chamber. The attachment of the adapter circuit board to the side surface of the box girder 6 does not excessively occupy the interior space of the first chamber.Since the side surface of the box support 6 offers more space than the upper end surface of the box support 6, adapter circuit boards of different models and sizes can be flexibly accommodated, which increases the flexibility of the structural design, and furthermore, the orientation of the adapter circuit board towards the first chamber prevents the adapter circuit board from taking up space in the battery chamber or disturbing it, which improves the stability of the battery operation.

[0064] In this case, the adapter board thickness is between 1 mm and 3 mm, e.g., 1 mm, 2 mm, and 3 mm. If the adapter board is too thick, it occupies too much space lengthwise within the housing. If the adapter board is too thin, its structural strength may be insufficient. Any adapter board within this thickness range will not take up excessive space lengthwise within the housing while still ensuring sufficient structural strength.

[0065] Furthermore, the length of output branch 3 along its direction of extension lies within the range of 50 mm to 150 mm, e.g., 50 mm, 90 mm, 130 mm, and 150 mm. If output branch 3 is too long, this impairs its structural strength and leads to rejects. If it is too short, this hinders the cable connection and increases the operating effort. The length of output branch 3 along its direction of extension lies within the aforementioned length range, which has a positive effect on wiring routing and also ensures structural strength.

[0066] In particular, the adapter circuit board and the side surface of the box support 6 can be connected by a snap mechanism, wherein the snap mechanism comprises a projection and a recess, the projection being arranged on one side of the adapter circuit board and one of the side surfaces of the box support 6 facing the box support 6, and the recess being arranged on the other side, such that the projection and the recess are able to snap together. This snap mechanism makes the connection between the adapter circuit board and the side surface of the box support 6 more stable.

[0067] Although the embodiments of the present utility model are described in conjunction with the figures, the person skilled in the art may make various modifications and variations without departing from the spirit and scope of the present utility model, and such modifications and variations are all within the scope defined by the attached claims.

Claims

[1] Battery device, characterized by that it includes the following: a main wiring harness (1) in which several wires are provided, the wires being electrically connected to a battery; an output terminal (2) located at at least one end of the main wiring harness (1), wherein the output terminal (2) is directly electrically connected to a battery management assembly; An adapter circuit board arranged between the main wiring harness (1) and the output terminal (2), wherein a signal input port of the adapter circuit board is electrically connected to the main wiring harness (1) and a signal output port is electrically connected to the output terminal (2), wherein an output branch (3) is arranged between the adapter circuit board and the output terminal (2), the ratio of the thickness of the adapter circuit board to the length of the output branch (3) along its extension direction is in the range of 0.003 to 0.06, and the output terminal (2) is provided at at least one end of the main wiring harness (1); wherein the output terminal (2) has multiple pins and the number of pins of the output terminal (2) should be greater than or equal to the number of wires of the main wiring harness (1). [2] Battery device according to claim 1, characterized by, that the length of the output branch (3) along its direction of extension is shorter than the length of the main cable harness (1) along its direction of extension and that the width of the output branch (3) is greater than the width of the main cable harness (1). [3] Battery device according to claim 1, characterized by , that the direction of extension of the main cable harness (1) and the direction of extension of the output branch (3) are arranged at an angle and the angle is in the range of 10° to 179°. [4] Battery device according to claim 1, characterized by , that the extension direction of the main cable harness (1) runs parallel to the extension direction of the output branch (3). [5] Battery device according to claim 1, characterized by , furthermore comprising a protective assembly, wherein the protective assembly comprises an upper cover plate (4) and the upper cover plate (4) covers the adapter circuit board. [6] Battery device according to claim 5, characterized by , that the protective assembly further comprises a lower cover plate (5), wherein the lower cover plate (5) interacts with the upper cover plate (4) to form a receiving space in which the adapter circuit board is arranged; and that a locking element is provided on the adapter circuit board. [7] Battery device according to any one of claims 1 to 6, characterized by , that the length of the output branch (3) along its direction of extension is in the range of 50 mm to 150 mm. [8] Battery device according to claim 1, characterized by that the battery device includes multiple batteries and a flexible circuit board. [9] Battery device according to claim 8, characterized by , that the output terminal (2) is an output port for the electrical signal of the flexible printed circuit board. [10] Battery device according to claim 1, characterized by, that the pin sequence of the output terminal (2) matches the pin sequence of the terminal of the battery management assembly. [11] Battery device according to claim 1, characterized by , that the output branch (3) has a flexible cable harness structure. [12] Battery device according to claim 7, characterized by , that the output branch (3) is bent when the output branch (3) is arranged. [13] Battery device according to claim 1, characterized by , that a segment of the cable harness of the output branch (3) adjacent to the output end (2) is fixed by gluing. [14] Battery device according to claim 1, characterized by , that the extension direction of the main cable harness (1) and the extension direction of the output branch (3) lie in the same plane. [15] Battery device according to claim 1, characterized by, that the direction of extension of the main cable harness (1) and the direction of extension of the output branch (3) lie in different planes. [16] Battery device according to claim 15, characterized by , that the output branch (3) is arranged in a folded structure and the output branch (3) comprises a first sub-branch and a second sub-branch which are successively connected to each other; wherein the first sub-branch of the output branch (3) is connected to the main wiring harness (1) and runs perpendicular to the main wiring harness (1); and the second sub-branch of the output branch (3) runs parallel to the main wiring harness (1). [17] Battery device according to claim 1, characterized by that the adapter circuit board is a printed circuit board. [18] Battery device according to claim 1, characterized by that the hardness of the adapter circuit board is in the range of 80 HRM to 100 HRM. [19] Battery device according to claim 5, characterized by , that the adapter circuit board has a square board structure and the upper cover plate (4) also has a square cover plate structure. [20] Battery device according to claim 6, characterized by , that the lower cover plate (5) is detachably connected to the upper cover plate (4). [21] Battery device according to claim 20, characterized by , that the lower cover plate (5) and the upper cover plate (4) are connected to each other by a snap mechanism. [22] Battery device according to claim 21, characterized by , that the snap mechanism comprises a detent projection and a detent groove, wherein the detent projection is arranged on one of the two cover plates - the lower cover plate (5) or the upper cover plate (4) - and the detent groove is arranged on the respective other cover plate. [23] Battery device according to claim 20, characterized by, that the lower cover plate (5) and the upper cover plate (4) can also be connected to each other by means of fastening elements. [24] Battery device according to claim 20, characterized by , that the box structure formed after connecting the lower cover plate (5) or the upper cover plate (4) is a flat box structure. [25] Battery pack, characterized by , that it comprises a box body and the battery device according to one of claims 1 to 24, wherein the box body comprises a base plate, a frame and a box support (6), wherein the frame is provided around the edge of the base plate and forms a receiving chamber, wherein the box support (6) is provided perpendicular to the base plate and is placed in the receiving chamber and the adapter circuit board of the battery device is provided on the box support (6). [26] Battery pack according to claim 25, characterized by, that the protective assembly of the battery device is arranged on the upper end face of the box support (6) facing away from the base plate, that the thickness of the adapter circuit board is in the range of 0.5 mm to 2 mm and the length of the output branch (3) along its extension direction is in the range of 50 mm to 120 mm. [27] Battery pack according to claim 25, characterized by , that the box support (6) divides the receiving chamber into a first chamber and a second chamber, wherein the electrical components are arranged in the first chamber and the batteries are arranged in the second chamber, and wherein the adapter circuit board is arranged on the side of the box support (6) and points towards the inside of the first chamber; and wherein the thickness of the adapter circuit board is in the range of 1 mm to 3 mm and the length of the output branch (3) along its extension direction is in the range of 50 mm to 150 mm. [28] Battery pack according to claim 25, characterized by , that the box girder (6) is formed in one piece with the base plate or that the box girder (6) is detachably mounted on the base plate. [29] Battery pack according to claim 25, characterized by , that the adapter circuit board is bonded to the box carrier (6) by means of an adhesive film. [30] Battery pack according to claim 25, characterized by , that the adapter circuit board and the side of the box support (6) can be connected by a snap mechanism, wherein the snap mechanism comprises a projection and a recess, the projection being arranged on the side of the adapter circuit board facing the box support (6) and the recess being arranged on the other side of the box support (6), such that the projection and the recess are able to snap together.

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