Battery device and battery pack

Abstract

The present invention relates to the technical field of new energy batteries, and discloses a battery device and a battery pack. The battery device makes the pin sequence of the output end consistent with the pin sequence of the battery management component port, which is convenient for the circuit connection between the output end of the battery device and the battery management component port, and can also enhance the structural strength of the output end, and facilitate the plug-in operation between the output end and the battery management component port. The battery device of the present invention includes a main line harness, an output end, and a switching circuit board, wherein a plurality of wires are arranged in the main line harness, the output end is arranged at at least one end of the main line harness, the output end is directly electrically connected to the battery management component, the switching circuit board is arranged between the main line harness and the output end, the signal input port of the switching circuit board is electrically connected to the main line harness, the signal output port is electrically connected to the output end, an output branch is arranged between the switching circuit board and the output end, and the ratio of the thickness of the switching circuit board to the length of the output branch along its extension direction is in the range of [0.003, 0.06].

Description

Technical Field

[0001] The present invention relates to the technical field of new energy batteries, and in particular to a battery device and a battery pack. Background Art

[0002] With the continuous development of new energy technology, new energy batteries, as an environmentally friendly energy storage and release device, have been widely used in energy storage power systems such as hydropower, thermal, wind and solar power stations, as well as power tools, electric bicycles, electric motorcycles, electric vehicles, military equipment, aerospace and many other technical fields.

[0003] FPC (Flexible Printed Circuit, FPC for short) is one of the important accessories of new energy batteries. Compared with traditional wiring harnesses, FPC has obvious advantages in safety, process flexibility, and automated production. Usually, the output end of FPC needs to be connected to the battery management component (such as a connector), but the pin sequence of the FPC output end does not match the pin sequence of the battery management component port, which makes it difficult to connect the FPC circuit. Summary of the invention

[0004] In view of this, the present invention provides a battery device and a battery pack to solve the connection difficulty problem of the existing FPC.

[0005] In a first aspect, the present invention provides a battery device, comprising:

[0006] A main wiring harness, wherein a plurality of wires are arranged inside the main wiring harness, and the wires are electrically connected to the battery;

[0007] An output end, disposed at at least one end of the main wiring harness, the output end being directly electrically connected to a battery management component;

[0008] An adapter circuit board is arranged between the main line bundle and the output end, a signal input port of the adapter circuit board is electrically connected to the main line bundle, a signal output port is electrically connected to the output end, an output branch is arranged between the adapter circuit board and the output end, and a ratio range of a thickness of the adapter circuit board to a length of the output branch along its extension direction is [0.003, 0.06].

[0009] Beneficial effect: In the battery device of the present invention, the adapter circuit board is arranged between the main line harness and the output end, the signal input port of the adapter circuit board is electrically connected to the main line harness, and the signal output port is electrically connected to the output end, that is, the main line harness is connected to the output end through the adapter circuit board, and the adapter circuit board is used as a jumper adapter board, which can realize the jumper transfer of the main line harness. After the jumper transfer of the adapter circuit board, the pin sequence of the output end can be consistent with the pin sequence of the battery management component port, so as to facilitate the circuit connection between the output end of the battery device and the battery management component port, simplify the connection structure, and reduce the difficulty of connecting the output end of the battery device and the battery management component port. Moreover, the adapter circuit board can also enhance the structural strength of the output end, which is conducive to the subsequent plug-in matching of the output end with the battery management component port. In addition, 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, 0.06]. Under the above relationship, the structural strength of the output end can be more suitable for plugging with the battery management component port, which is convenient for plugging operation and is conducive to the installation and layout of electrical components.

[0010] In a second aspect, the present invention provides a battery pack, comprising a box body and a battery device as described above, wherein the box body comprises a bottom plate, a frame and a box beam, wherein the frame is arranged around the edge of the bottom plate and forms a accommodating compartment, the box beam is arranged perpendicular to the bottom plate and placed in the accommodating compartment, and the adapter circuit board of the battery device is arranged on the box beam.

[0011] Since the battery pack of the present invention includes the battery device of the present invention, it has the same beneficial effects as the battery device, which will not be described in detail here. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] In order to more clearly illustrate the specific implementation methods of the present invention or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0013] Figure 1 It is a front view of the battery device (partial structure) of the present invention;

[0014] Figure 2 is a three-dimensional schematic diagram of a battery device (partial structure) of the present invention;

[0015] Figure 3 for Figure 2 Enlarged schematic diagram of part A.

[0016] Description of reference numerals:

[0017] 1. Main route harness;

[0018] 2. Output terminal;

[0019] 3. Output branch;

[0020] 4. Upper cover;

[0021] 5. Lower cover;

[0022] 6. Box beam. DETAILED DESCRIPTION

[0023] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present invention.

[0024] Combine the following Figure 1-Figure 3 , describing embodiments of the battery device and battery pack of the present invention.

[0025] According to an embodiment of the present invention, on the one hand, a battery device is provided, including: a main wiring harness 1, an output terminal 2 and an adapter circuit board, wherein a plurality of wires are arranged inside the main wiring harness 1, and the wires are electrically connected to the battery, the output terminal 2 is arranged at at least one end of the main wiring harness 1, and the output terminal 2 is directly electrically connected to the battery management component, the 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 the signal output port is electrically connected to the output terminal 2, an output branch 3 is arranged between the adapter circuit board and the output terminal 2, and the ratio range of the thickness of the adapter circuit board to the length of the output branch 3 along its extension direction is [0.003, 0.06].

[0026] In this battery device, the 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 the signal output port is electrically connected to the output terminal 2, that is, the main wiring harness 1 is connected to the output terminal 2 through the adapter circuit board, and the adapter circuit board is used as a jumper adapter board, which can realize the jumper transfer of the main wiring harness 1. After the jumper transfer of the adapter circuit board, the pin sequence of the output terminal 2 can be consistent with the pin sequence of the battery management component port, so as to facilitate the circuit connection between the output terminal 2 of the battery device and the battery management component port, simplify the connection structure, and reduce the difficulty of connecting the output terminal 2 of the battery device and the battery management component port. In addition, the adapter circuit board can also enhance the structural strength of the output terminal 2, which is conducive to the subsequent plug-in matching of the output terminal 2 with the battery management component port. In addition, 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, 0.06]. Under the above relationship, the structural strength of the output terminal 2 can be more suitable for plugging into the battery management component port, facilitating the plugging operation and facilitating the installation and layout of electrical components.

[0027] The battery device includes a plurality of batteries and an FPC, wherein the FPC refers to a flexible printed circuit, or FPC for short.

[0028] The main wiring harness 1 is the main output wiring harness of the battery device, and a plurality of wires are arranged inside it. The wires are electrically connected to the battery and used to collect battery information. The wiring harness order of the wires inside the main wiring harness 1 is a prescribed or preset order. In this embodiment, the main wiring harness 1 is specifically a wiring arrangement structure.

[0029] The output terminal 2 is the output port of the FPC electrical signal, and the output terminal 2 is arranged at at least one end of the main wiring harness 1, such as the output terminal 2 is arranged at both ends or one end of the main wiring harness 1. There are multiple pins on the output terminal 2, and the number of pins of the output terminal 2 should be greater than or equal to the number of wiring harnesses of the main wiring harness 1. For compact structural design, in this embodiment, the number of pins of the output terminal 2 is equal to the number of wiring harnesses of the main wiring harness 1. If the main wiring harness 1 is directly connected to the output terminal 2, then the pin order of the output terminal 2 should be the same as the wiring harness order of the main wiring harness 1, but in the present invention, the main wiring harness 1 is not directly connected to the output terminal 2, but the main wiring harness 1 is connected to the output terminal 2 through a switching circuit board.

[0030] The adapter circuit board is arranged between the main line harness 1 and the output terminal 2, the signal input port of the adapter circuit board is electrically connected to the main line harness 1, and the signal output port of the adapter circuit board is electrically connected to the output terminal 2. The adapter circuit board has a certain thickness and hardness, and the shape and size of the adapter circuit board can be selected and set according to needs, and this embodiment does not limit this. The signal input port of the adapter circuit board is connected to the main line harness 1, so the pin order of the signal input port of the adapter circuit board is the same as the harness order of the main line harness 1, the adapter circuit board can jumper the main line harness 1 to change the pin order, the signal output port of the adapter circuit board is connected to the output terminal 2, and the pin order of the signal output port of the adapter circuit board is the changed pin order, then the pin order of the output terminal 2 is also the changed pin order. That is to say, the adapter circuit board serves as a jumper adapter board, which can realize the jumper adapter of the main wiring harness 1, and can convert the pin order of the output terminal 2 into the pin order of the subsequent battery management component port, so that the pin order of the output terminal 2 is consistent with the pin order of the battery management component port, thereby facilitating the direct circuit connection between the output terminal 2 and the battery management component port, simplifying the connection structure, and reducing the difficulty of connecting the battery device output terminal 2 and the battery management component port.

[0031] The transfer circuit board refers to a printed circuit board, abbreviated as PCB. In this embodiment, the transfer circuit board is a rectangular plate structure.

[0032] An output branch 3 is provided between the adapter circuit board and the output terminal 2, and the output branch 3 is used to connect the signal output port of the adapter circuit board and the output terminal 2, and ensure that the pin sequence of the output terminal 2 is the same as the pin sequence of the output port of the adapter circuit board.

[0033] In this embodiment, the output branch 3 adopts a flexible wire harness structure to facilitate the connection between the transfer circuit board and the output terminal 2. The output branch 3 has a certain length, but if the output branch 3 is too long, it will affect the structural strength of the output terminal 2, and it is not convenient to fix the output branch 3 later, and it is not conducive to the subsequent plugging of the output terminal 2 and the connector. If the output branch 3 is too short, it is not convenient to transfer the connection between the circuit board and the output terminal 2, which increases the difficulty of operation and loses the purpose of setting the output branch 3.

[0034] When the output branch 3 is set, the output branch 3 will be bent. In the present application, the length of the output branch 3 refers to the length of the output branch 3 along its extension direction, that is, the total length of the output branch 3 after being flattened.

[0035] 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, 0.06]. If the ratio of the thickness of the adapter circuit board to the length of the output branch 3 along its extension direction is too large, the thickness of the adapter circuit board is too thick or the length of the output branch 3 along its extension direction is too short. If the thickness of the adapter circuit board is too thick, it will occupy too much setting space. If the length of the output branch 3 along its extension direction is too short, it is not convenient for line connection and makes the connection operation difficult. If the ratio of the thickness of the adapter circuit board to the length of the output branch 3 along its extension direction is too small, the thickness of the adapter circuit board is too thin or the length of the output branch 3 along its extension direction is too long. If the thickness of the adapter circuit board is too thin, the structural strength is insufficient. If the length of the output branch 3 along its extension direction is too long, it is also not conducive to line layout and causes waste. When the thickness of the adapter circuit board and the length of the output branch 3 along its extension direction satisfy the above relationship, the structural strength of the adapter circuit board is more suitable, which is beneficial to line layout and can save setting space. At this time, the structural strength of the output terminal 2 is also relatively appropriate, making the structural strength of the output terminal 2 more suitable for plugging in with the battery management component port, facilitating the plug-in operation, and facilitating the installation and layout of electrical components.

[0036] The length range of the output branch 3 along its extension direction is [50mm, 150mm], for example: 50mm, 75mm, 110mm, 150mm, etc. The thickness range of the adapter circuit board is [0.5mm, 3mm], for example: 0.5mm, 0.8mm, 1mm, 2.2mm, 3mm, etc.

[0037] Furthermore, the length of the output branch 3 along its extending direction is shorter than the length of the main line bundle 1 along its extending direction, and the width of the output branch 3 is larger than the width of the main line bundle 1 .

[0038] In this embodiment, the length of the output branch 3 along its extension direction is smaller than the length of the main route bundle 1 along its extension direction, and the width of the output branch 3 is larger than the width of the main route bundle 1, so that the sizes of the main route bundle 1 and the output branch 3 can meet the needs of battery information collection, information transmission, etc., while saving setting space and manufacturing costs.

[0039] Furthermore, the extension direction of the main line bundle 1 and the extension direction of the output branch 3 are arranged at an angle, and the range of the angle is [10°, 179°].

[0040] The signal input port of the adapter circuit board is connected to the main line harness 1 , and the signal output port of the adapter circuit board is connected to the output branch 3 .

[0041] The adapter circuit board can not only perform jumper connection on the main line bundle 1, but also change the line direction through line connection to achieve the purpose of line steering, that is, the extension direction of the main line bundle 1 is set at an angle with the extension direction of the output branch 3, so that the line does not need to be bent during layout and no additional fixed structure needs to be set, so that the line design is optimized and simplified, the setting space is saved, and the structure is compactly set.

[0042] In this embodiment, the extension direction of the main route bundle 1 and the extension direction of the output branch 3 are in the same plane, and the extension direction of the main route bundle 1 and the extension direction of the output branch 3 are set at an angle, and the range of the angle is [10°, 179°]. For example, the extension direction of the main route bundle 1 can be 10°, 60°, 90°, 120°, 179°, etc. with the extension direction of the output branch 3. The specific angle value of the angle can be set according to the needs of spatial layout, etc., and this embodiment does not limit this.

[0043] In other embodiments, the extension direction of the main route bundle 1 and the extension direction of the output branch 3 are located in different planes. In this case, the main route bundle 1 and the output branch 3 are arranged in different planes, so that the spatial layout of the main route bundle 1 and the output branch 3 is more flexible, which is conducive to the compact arrangement of the overall structure and saves the setting space. For example: the output branch 3 is arranged in a folded structure, and the output branch 3 includes a first partial branch and a second partial branch connected in sequence. The first partial branch of the output branch 3 is connected to the main route bundle 1 and is perpendicular to the main route bundle 1, and the second partial branch of the output branch 3 is parallel to the main route bundle 1.

[0044] In other embodiments, the extension direction of the main line bundle 1 is parallel to the extension direction of the output branch 3. According to different line layout requirements, the extension direction of the main line bundle 1 can also be parallel to the extension direction of the output branch 3 to improve the flexibility of line layout.

[0045] Furthermore, the hardness range of the adapter circuit board is [80 HRM, 100 HRM].

[0046] The adapter circuit board is a plate-like structure as a whole, and electrical components are arranged on it. In this embodiment, the adapter circuit board is a square plate-like structure, and the adapter circuit board has a certain structural hardness, so that the adapter circuit board can enhance the structural strength of the output terminal 2. If the hardness of the adapter circuit board is too small, the structural strength of the output terminal 2 cannot be effectively enhanced, and if the hardness of the adapter circuit board is too large, the manufacturing cost and manufacturing difficulty will be increased. In this embodiment, the hardness range of the adapter circuit board is [80 HRM, 100 HRM]. Within the above hardness range, the hardness of the adapter circuit board is moderate, which can effectively enhance the structural strength of the output terminal 2 without excessively increasing the manufacturing difficulty and manufacturing cost.

[0047] In this embodiment, the hardness of the adapter circuit board may be 80HRM, 95HRM, 100HRM, etc.

[0048] Furthermore, the battery device also includes a protection component, which includes an upper cover plate 4, and the upper cover plate 4 covers the adapter circuit board.

[0049] The protective component is used to protect the adapter circuit board and prevent the external structure or operation process from damaging the adapter circuit board. Specifically, the protective component includes an upper cover plate 4, which covers the adapter circuit board to protect the upper surface of the adapter circuit board. That is to say, the upper cover plate 4 covers the upper surface of the adapter circuit board, and the upper surface of the adapter circuit board is usually provided with electrical components. The upper cover plate 4 can protect the electrical components on the adapter circuit board to achieve the purpose of dustproof and waterproof (anti-condensation water), so that the adapter circuit board can maintain its function, thereby ensuring the normal operation of the overall circuit. In addition, the upper cover plate 4 can further enhance the strength of the adapter circuit board, thereby further enhancing the structural strength of the output branch 3 and the output end 2.

[0050] The shape and size of the upper cover plate 4 should match those of the adapter circuit board. In this embodiment, the adapter circuit board is a square plate structure, so the upper cover plate 4 is also a square cover structure.

[0051] Furthermore, the protection component also includes a lower cover plate 5, which cooperates with the upper cover plate 4 to form a receiving space, and the adapter circuit board is placed in the receiving space.

[0052] In order to further protect the adapter circuit board, the protection component also includes a lower cover plate 5, which cooperates with the upper cover plate 4 to form a receiving space, and the adapter circuit board is placed in the receiving space. The lower cover plate 5 can cover the lower surface of the adapter circuit board, so that the lower surface of the adapter circuit board can also be effectively protected, and the lower cover plate 5 can also cooperate with the upper cover plate 4 to form a receiving space, which is suitable for accommodating the adapter circuit board, so that the adapter circuit board is not exposed as a whole, thereby protecting the adapter circuit board in all directions.

[0053] The shape and size of the lower cover plate 5 should match 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 are both square plate structures, so the lower cover plate 5 is also a square cover structure.

[0054] Optionally, the lower cover plate 5 is detachably connected to the upper cover plate 4, for example, the lower cover plate 5 and the upper cover plate 4 are connected by a snap-fit ​​mechanism, the snap-fit ​​mechanism includes a buckle and a slot, the buckle is arranged on one of the lower cover plate 5 and the upper cover plate 4, and the slot is arranged on the other one, the buckle and the slot can be snap-fitted to realize the detachable connection between the lower cover plate 5 and the upper cover plate 4.

[0055] Of course, in order to simplify the structure and reduce the manufacturing cost, the lower cover plate 5 and the upper cover plate 4 can also be detachably connected by fasteners such as bolts.

[0056] In addition, in order to reduce the size of the protective component and not occupy too much space, the box structure formed by connecting the lower cover plate 5 and the upper cover plate 4 is a flat box structure, as long as it can fully cover the adapter circuit board.

[0057] Furthermore, a safety component is provided on the adapter circuit board.

[0058] In order to protect the circuit connections and electrical components of the adapter circuit board, a fuse is provided on the adapter circuit board. The fuse can effectively protect the adapter circuit board from damage or fire hazards caused by excessive current, thereby ensuring the normal operation of the overall circuit.

[0059] Optionally, the setting position of the safety element is close to the output terminal 2, that is, the safety element set on the adapter circuit board is relatively close to the output terminal 2. The setting of the safety element at this position can speed up the reaction speed of the safety element, improve the protection effect of the adapter circuit board, and make the protection effect of the safety element more reliable.

[0060] The insurance component may be a common insurance component such as a fuse, a protective resistor, etc., and this embodiment does not impose any limitation on this.

[0061] Furthermore, the length range of the output branch 3 along its extending direction is [50 mm, 150 mm].

[0062] If the output branch 3 is too long, it will affect the structural strength of the output terminal 2, and it is not convenient for the subsequent fixation of the output branch 3, and it is not conducive to the subsequent plugging of the output terminal 2 and the connector. If the output branch 3 is too short, it is not convenient to connect the adapter circuit board with the output terminal 2, which increases the difficulty of operation and loses the purpose of setting the output branch 3. In this embodiment, the length range of the output branch 3 is [50mm, 150mm]. Within the above length range, the output branch 3 is neither too long nor too short. The length of the output branch 3 is relatively appropriate, does not affect the structural length of the output terminal 2, is conducive to the fixation of the output branch 3, and allows the subsequent output terminal 2 to be conveniently plugged and matched with the connector, and can facilitate the connection of the adapter circuit board with the output terminal 2, simplifying the operation.

[0063] The length of the output branch 3 can be 50 mm, 75 mm, 110 mm, 150 mm, etc.

[0064] like Figure 3 As shown, this embodiment also provides a battery pack, including a box body and a battery device as described above, the box body includes a bottom plate, a frame and a box beam 6, the frame is arranged around the edge of the bottom plate and forms a accommodating chamber, the box beam 6 is arranged perpendicular to the bottom plate and placed in the accommodating chamber, and the adapter circuit board of the battery device is arranged on the box beam 6.

[0065] This battery has the battery device of this embodiment, and the adapter circuit board can jumper the main line harness 1. After the jumper switching of the adapter circuit board, the pin order of the output terminal 2 is consistent with the pin order of the battery management component port, so as to facilitate the circuit connection between the output terminal 2 and the battery management component port, simplify the connection structure, and reduce the difficulty of connecting the output terminal 2 of the battery device with the battery management component port. Moreover, the adapter circuit board can also enhance the structural strength of the output terminal 2, which is beneficial to the subsequent plug-in matching of the output terminal 2 with the battery management component port. In addition, 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, 0.06]. Under the above relationship, the structural strength of the output terminal 2 can be more suitable for plugging with the battery management component port, which is convenient for plugging operation and is beneficial to the installation and layout of electrical components.

[0066] The box body is the load-bearing structure of the battery pack and has a certain structural strength. The box body includes a bottom plate, a frame and a box beam 6. The frame is arranged at the edge of the bottom plate to form a storage compartment, and the battery device is suitable for being arranged in the storage compartment. Of course, the battery of this embodiment also has electrical components and structures that existing batteries have, which will not be repeated here.

[0067] The box beam 6 is arranged perpendicular to the bottom plate and placed in the storage compartment. The box beam 6 can be integrally formed with the bottom plate, or the box beam 6 can be detachably mounted on the bottom plate. The switching circuit board of the battery device is arranged on the box beam 6 to facilitate the installation and fixation of the battery device and ensure the installation strength.

[0068] Since a section of the wiring harness near the output terminal 2 of the output branch 3 of the battery device is not convenient to fix due to its large flexibility, it can usually only be fixed by bonding. However, the entire package is prone to shaking back and forth due to vibration during use, and the bonding is also prone to failure. This embodiment uses the characteristics of the adapter circuit board with large thickness and high strength to fix the adapter circuit board on the box beam 6 (for example, the adapter circuit board is bonded to the box beam 6 by adhesive), thereby fixing a section of the output branch 3 of the battery device near the output terminal 2, making the structure firm and reliable, and not easy to fall off and shake due to vibration.

[0069] Of course, the box beam 6 in the box body may also be provided with other structural devices, which will not be described in detail here.

[0070] Furthermore, the protective component of the battery device is arranged on the upper end surface of the box beam 6 away from the bottom plate, the thickness range of the adapter circuit board is [0.5mm, 2mm], and the length range of the output branch 3 along its extension direction is [50mm, 120mm].

[0071] The adapter circuit board is protected by a protective component, and the protective component is arranged on the upper end surface of the box beam 6 away from the bottom plate. The adapter circuit board and the protective component are arranged at this position without affecting the arrangement of other electrical structures, and the arrangement space is fully utilized.

[0072] At this time, the thickness range of the adapter circuit board is [0.5mm, 2mm], such as 0.5mm, 0.9mm, 1.3mm, 2mm. If the adapter circuit board is too thick, it will occupy too much of the longitudinal (vertical, z-direction) setting space of the box. If the adapter circuit board is too thin, the structural strength of the adapter circuit board will be insufficient. If the thickness of the adapter circuit board is within the above thickness range, it will not occupy too much of the longitudinal setting space of the box, and its structural strength can also be guaranteed.

[0073] Moreover, the length range of the output branch 3 along its extension direction is [50mm, 120mm], such as 50mm, 70mm, 105mm, 120mm. If the length of the output branch 3 is too long, it will affect the structural strength and cause waste. If the length of the output branch 3 is too short, it will be unfavorable for line connection and increase the difficulty of operation. The length of the output branch 3 along its extension direction is within the above-mentioned length range, which is conducive to line layout and can also ensure structural strength.

[0074] Furthermore, the box beam 6 divides the accommodating chamber into a first chamber and a second chamber, electrical components are arranged in the first chamber, batteries are arranged in the second chamber, and the adapter circuit board is arranged on the side of the box beam 6 and faces the inside of the first chamber; the thickness range of the adapter circuit board is [1mm, 3mm], and the length range of the output branch 3 along its extension direction is [50mm, 150mm].

[0075] In the box body, the box beam 6 divides the inner part of the box body into a first chamber and a second chamber, that is, the box beam 6 divides the containing chamber into a first chamber and a second chamber, and the first chamber is provided with electrical components, such as battery management components such as BDU\BMS, so the first chamber can also be called an electrical chamber, and the second chamber is provided with individual batteries of the battery device, so the second chamber can also be called a battery chamber.

[0076] like Figure 3As shown, the adapter circuit board is arranged on the side of the box beam 6 and faces the inside of the first compartment. Specifically, the larger plane of the adapter circuit board is arranged parallel to the side of the box beam 6, and then the adapter circuit board is fixedly connected to the side of the box beam 6, and the adapter circuit board faces the inside of the first compartment. The adapter circuit board is fixed to the side of the box beam 6, which will not occupy too much internal space of the first compartment. Moreover, since the side of the box beam 6 has a larger space than the upper end surface of the box beam 6, adapter circuit boards of various models and sizes can be flexibly adapted, thereby improving the flexibility of the structural setting. Moreover, by facing the adapter circuit board into the first compartment, it is possible to avoid the adapter circuit board from occupying and interfering with the battery compartment, thereby improving the stability of the battery operation.

[0077] At this time, the thickness range of the adapter circuit board is [1mm, 3mm], such as 1mm, 2mm, 3mm. If the thickness of the adapter circuit board is too thick, it will occupy too much longitudinal setting space of the box. If the thickness of the adapter circuit board is too thin, it will lead to insufficient structural strength of the adapter circuit board. If the thickness of the adapter circuit board is within the above thickness range, it will not occupy too much longitudinal setting space of the box, and its structural strength can also be guaranteed.

[0078] Moreover, the length range of the output branch 3 along its extension direction is [50mm, 150mm], such as 50mm, 90mm, 130mm, 150mm. If the length of the output branch 3 is too long, it will affect the structural strength and cause waste. If the length of the output branch 3 is too short, it will be unfavorable for line connection and increase the difficulty of operation. The length of the output branch 3 along its extension direction is within the above-mentioned length range, which is conducive to line layout and can also ensure structural strength.

[0079] Specifically, the adapter circuit board can be connected to the side of the box beam 6 through a clamping mechanism, which includes a protrusion and a groove, and one of the side of the adapter circuit board facing the box beam 6 and the side of the box beam 6 is provided with a protrusion, and the other is provided with a groove, and the protrusion and the groove can be clamped and matched to achieve the connection between the adapter circuit board and the side of the box beam 6. This clamping mechanism can make the connection between the adapter circuit board and the side of the box beam 6 more secure.

[0080] Although the embodiments of the present invention have been described in conjunction with the accompanying drawings, those skilled in the art may make various modifications and variations without departing from the spirit and scope of the present invention, and such modifications and variations are all within the scope defined by the appended claims.

Claims

1. A battery device, characterized in that: include: A main wiring harness (1), wherein a plurality of wires are arranged inside the main wiring harness, and the wires are electrically connected to a battery; An output end (2) is arranged at at least one end of the main wiring harness (1), and the output end (2) is directly electrically connected to a battery management component; A switching circuit board is arranged between the main wiring harness (1) and the output end (2), a signal input port of the switching circuit board is electrically connected to the main wiring harness (1), and a signal output port is electrically connected to the output end (2), an output branch (3) is arranged between the switching circuit board and the output end (2), and a ratio of a thickness of the switching circuit board to a length of the output branch (3) along its extension direction is in the range of [0.003, 0.06].

2. The battery device according to claim 1, characterized in that: The length of the output branch (3) along its extension direction is shorter than the length of the main line bundle (1) along its extension direction, and the width of the output branch (3) is larger than the width of the main line bundle (1).

3. The battery device according to claim 1, characterized in that: The extension direction of the main line bundle (1) and the extension direction of the output branch (3) are arranged at an angle, and the range of the angle is [10°, 179°].

4. The battery device according to claim 1, characterized in that: The extension direction of the main line bundle (1) is parallel to the extension direction of the output branch (3).

5. The battery device according to claim 1, characterized in that: It also comprises a protection component, the protection component comprising an upper cover plate (4), the upper cover plate (4) covering the adapter circuit board.

6. The battery device according to claim 5, characterized in that: The protection assembly further comprises a lower cover plate (5), wherein the lower cover plate (5) cooperates with the upper cover plate (4) to form a receiving space, and the adapter circuit board is placed in the receiving space; a safety element is provided on the adapter circuit board.

7. The battery device according to any one of claims 1 to 6, characterized in that: The length of the output branch (3) along its extension direction ranges from [50 mm to 150 mm].

8. A battery pack, characterized in that: The invention comprises a box body and a battery device as claimed in any one of claims 1 to 7, wherein the box body comprises a bottom plate, a frame and a box beam (6), wherein the frame is arranged around the edge of the bottom plate and forms a storage compartment, the box beam (6) is arranged perpendicular to the bottom plate and is placed in the storage compartment, and the adapter circuit board of the battery device is arranged on the box beam (6).

9. The battery pack according to claim 8, characterized in that: The protective component of the battery device is arranged on the upper end surface of the box beam (6) away from the bottom plate, the thickness range of the adapter circuit board is [0.5mm, 2mm], and the length range of the output branch (3) along its extension direction is [50mm, 120mm].

10. The battery pack according to claim 8, characterized in that: The box beam (6) divides the accommodating chamber into a first chamber and a second chamber, the first chamber is provided with electrical components, the second chamber is provided with batteries, the adapter circuit board is provided on the side of the box beam (6) and faces the inside of the first chamber; the thickness of the adapter circuit board is in the range of [1 mm, 3 mm], and the length of the output branch (3) along its extension direction is in the range of [50 mm, 150 mm].

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