Battery management device, battery and unmanned aerial vehicle

Abstract

The utility model discloses a battery management device, a battery and an unmanned aerial vehicle. The battery management mainboard is fixed in the shell; the connector assembly comprises a first connector and a damping part, the first connector is fixed to the damping part, the damping part is fixed to the shell, and damping and energy absorption are conducted on the first connector through the damping part; the first connector is electrically connected with the battery management mainboard; and the first connector can be connected with a second connector on a battery cell module in a plug-in manner, so that the battery cell module is electrically connected with the battery management mainboard. According to the scheme, a plurality of circuits on the battery management main board are gathered to the first connector, a plurality of circuits on the battery cell main board are gathered to the second connector, the first connector and the second connector are directly connected in a plug-in mode during assembly, excessive wire materials do not need to be consumed, the battery management device and the battery connection structure are simplified, and the reliability is improved.

Description

Technical Field

[0001] The present application relates to the technical field of mobile power supplies, and in particular to a battery management device, a battery, and a drone. Background Art

[0002] Many mobile electrical devices are equipped with mobile batteries for power supply, such as drones, agricultural machinery, electric vehicles, etc. In order to realize the intelligent management of battery, the mobile batteries currently on the market will adopt a combination of batteries and BMS (battery management system) to realize battery management. Specifically, the battery contains battery cells and battery cell motherboards. Various sensors for collecting battery cell related information are set inside the battery cells, and the sensors are connected to the battery cell motherboard through wires. The connection between the battery and the BMS is often connected to the battery cell motherboard and the BMS motherboard through wires. Specifically, a set of wires is required for each sensor. With the development of battery technology, more and more sensors are installed inside the battery cells, and the number of wires connecting the battery cell motherboard and the BMS motherboard has also increased, which has brought problems: increased battery costs, increased complexity in battery manufacturing, and reduced reliability. Utility Model Content

[0003] The purpose of the embodiments of the present utility model is to provide a battery management device, a battery, and a drone, which can solve the above-mentioned problems existing in the prior art.

[0004] To achieve the above objectives, this application adopts the following technical solutions:

[0005] In one aspect, a battery management device is provided, comprising:

[0006] shell;

[0007] A battery management mainboard is fixed in the housing;

[0008] The connector assembly includes a first connector and a shock absorber. The first connector is fixed to the shock absorber, and the shock absorber is fixed to the housing. The shock absorber absorbs shock and absorbs energy of the first connector. The first connector is electrically connected to the battery management motherboard. The first connector can be plugged into and connected to the second connector on the battery module to achieve electrical connection between the battery module and the battery management motherboard.

[0009] Optionally, the connector assembly is directly fixed to the housing.

[0010] Optionally, the connector assembly is fixed to the inner wall of the shell; the shell is provided with a through hole corresponding to the first connector, and the first connector can be plugged and connected to the second connector through the avoidance of the through hole.

[0011] Optionally, the connector assembly is fixed to the outer wall of the shell, the shell is provided with a wire hole, the battery management mainboard is connected to a wire, the wire extends out of the shell through the wire hole and is electrically connected to the first connector.

[0012] Optionally, the connector assembly is fixed on the battery management main board and is indirectly fixed to the housing through the battery management main board; a through hole corresponding to the first connector is provided on one side of the housing, and the first connector can be plugged and connected to the second connector through the avoidance of the through hole.

[0013] Optionally, the housing includes a heat dissipation back shell and a bottom cover, and the heat dissipation back shell and the bottom cover enclose a mounting cavity capable of accommodating the battery management mainboard; the battery management mainboard is fixed to the heat dissipation back shell.

[0014] Optionally, heat dissipation fins are provided on the heat dissipation back shell.

[0015] Optionally, the connector assembly further includes a locking bolt, a first through hole is provided on the first connector, a second through hole is provided on the shock absorber, the locking bolt passes through the first through hole and the second through hole and is threadedly locked to the outer shell or the battery management main board; moreover, the first through hole is a light hole; and / or, the part of the locking bolt corresponding to the first through hole is a light rod.

[0016] Optionally, a third through hole is provided on the battery management main board, a threaded hole is provided on the heat dissipation back shell, and the locking bolt passes through the first through hole, the second through hole and the third through hole in sequence and is threadedly locked in the threaded hole.

[0017] Optionally, a waterproof ring is provided on one side of the shell for fitting with the battery module, and the waterproof ring is arranged around the first connector. The waterproof ring can fit tightly against the surface of the battery module to seal the first connector and the second connector after plug-connection.

[0018] Optionally, the first connector includes a flexible flat cable, a circuit board and a plug-in terminal, the plug-in terminal is fixed on the circuit board, the circuit board is fixed on the shock absorber, and the flexible flat cable electrically connects the circuit board and the battery management mainboard.

[0019] On the other hand, a battery is provided, including a battery cell module and the above-mentioned battery management device, the battery cell module including a battery cell, a sensor, a battery cell main board and a second connector, the battery cell main board is electrically connected to the sensor, the battery cell main board is electrically connected to the second connector, and the second connector is plugged into the first connector on the battery management device.

[0020] Optionally, the battery further includes a battery shell, in which the battery cell and the battery cell mainboard are installed; and the outer shell of the battery management device is fastened to the battery shell by mounting bolts.

[0021] On the other hand, a drone is provided, comprising the above-mentioned battery.

[0022] The beneficial effects of the present application are as follows: the utility model provides a battery management device, which is provided with a first connector electrically connected to the battery management mainboard. When connected to the battery cell module, the first connector can be used to directly plug and connect with the second connector on the battery cell module, thereby completing the telecommunications interconnection between the battery cell module and the battery management mainboard. Compared with the traditional method of connecting with multiple sets of wires, this solution brings together multiple lines on the battery management mainboard to the first connector, and brings together multiple lines on the battery cell mainboard to the second connector. During assembly, the first connector and the second connector can be directly plugged and connected without consuming too much wire, thereby simplifying the battery management device and the battery connection structure and improving reliability.

[0023] In addition, this solution fixes a shock-absorbing component for the first connector, which can absorb shock and energy of the first connector. In a vibrating working environment, it can effectively reduce the vibration transmission between the shell and the first connector, improve the stability of the first connector, and effectively ensure the reliability of the docking between the first connector and the second connector. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] The present application is further described in detail below with reference to the accompanying drawings and examples.

[0025] Figure 1 This is one of the structural diagrams of the battery management device described in the embodiment of the present application;

[0026] Figure 2 This is the second structural diagram of the battery management device according to the embodiment of the present application;

[0027] Figure 3 This is one of the exploded diagrams of the battery management device according to an embodiment of the present application;

[0028] Figure 4 This is the second explosion diagram of the battery management device according to the embodiment of the present application;

[0029] Figure 5 This is a schematic diagram of an explosion of a battery according to an embodiment of the present application;

[0030] Figure 6 A cross-sectional view of a battery according to an embodiment of the present application;

[0031] Figure 7 for Figure 6 Magnified view of area A in center.

[0032] In the picture:

[0033] 1. Outer shell; 11. Heat dissipation back shell; 111. Heat dissipation fins; 12. Bottom cover; 121. Through hole; 2. Battery management motherboard; 21. Third through hole; 3. Connector assembly; 31. First connector; 311. Circuit board; 312. Plug terminal; 313. First through hole; 32. Shock absorber; 321. Second through hole; 33. Locking bolt; 4. Waterproof ring; 5. Battery cell module; 51. Battery cell; 52. Battery cell motherboard; 53. Second connector; 54. Battery housing; 6. Mounting bolt. DETAILED DESCRIPTION

[0034] To make the technical problems solved by this application, the technical solutions adopted, and the technical effects achieved more clearly, the technical solutions of the embodiments of this application are further described in detail below. Obviously, the embodiments described are only part of the embodiments of this application, not all of them. Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without making any creative efforts shall fall within the scope of protection of this application.

[0035] In the description of this application, unless otherwise expressly specified or limited, the terms "connected," "connected," and "fixed" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integration; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; and can refer to internal communication between two components or interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on specific circumstances.

[0036] In this application, unless otherwise expressly specified or limited, a first feature being "above" or "below" a second feature may include the first and second features being in direct contact, or may include the first and second features being in contact not directly but through another feature between them. Moreover, a first feature being "above," "above," and "above" a second feature may include the first feature being directly above or obliquely above the second feature, or may simply mean that the first feature is higher in level than the second feature. A first feature being "below," "below," and "below" a second feature may include the first feature being directly below or obliquely below the second feature, or may simply mean that the first feature is lower in level than the second feature.

[0037] Many mobile electrical devices are equipped with mobile batteries for power supply, such as drones, agricultural machinery, electric vehicles, etc. In order to realize the intelligent management of battery, the mobile batteries currently on the market will adopt a combination of batteries and BMS (battery management system) to realize battery management. Specifically, the battery contains battery cells and battery cell motherboards. Various sensors for collecting battery cell related information are set inside the battery cells, and the sensors are connected to the battery cell motherboard through wires. The connection between the battery and the BMS is often connected to the battery cell motherboard and the BMS motherboard through wires. Specifically, a set of wires is required for each sensor. With the development of battery technology, more and more sensors are installed inside the battery cells, and the number of wires connecting the battery cell motherboard and the BMS motherboard has also increased, which has brought problems: increased battery costs, increased complexity in battery manufacturing, and reduced reliability.

[0038] In order to overcome the above technical problems, refer to Figure 1-4 This embodiment provides a battery management device, including a housing 1, a battery management mainboard 2, and a connector assembly 3. The battery management mainboard 2 is fixed within the housing 1. The connector assembly 3 includes a first connector 31 and a shock absorber 32. The first connector 31 is fixed to the shock absorber 32, which is fixed to the housing 1. The shock absorber 32 absorbs vibration and energy for the first connector 31. The first connector 31 is electrically connected to the battery management mainboard 2. The first connector 31 can be plugged into a second connector 53 on a battery module 5 to achieve electrical connection between the battery module 5 and the battery management mainboard 2.

[0039] The battery management motherboard 2 is the core component of the entire battery management device. It can realize functions such as information collection and processing, communication and control, status monitoring and safety protection, balancing management and information management. It is a key component to ensure the safe and efficient operation of the battery module 5 system.

[0040] The core of the solution of this embodiment is to gather multiple connection points on the battery management main board 2 to the first connector 31, and correspondingly, gather multiple connection points on the battery main board 52 in the battery module 5 to the second connector 53. When the battery management device and the battery module 5 are assembled, the first connector 31 can be used to directly plug into the second connector 53 on the battery module 5, without the need to use multiple complicated wires to connect the multiple connection points of the battery management main board 2 and the battery main board 52 one by one.

[0041] The first connector 31 and the second connector 53 must be configured in a corresponding manner. When the first connector 31 is configured as a male socket, the second connector 53 should be configured as a female socket; when the first connector 31 is configured as a female socket, the second connector 53 should be configured as a male socket. The first connector 31 can be fixed to the housing 1 either inside or outside the housing 1. It can be fixed directly to the housing 1 or indirectly to a fixing structure within the housing 1, such as to the battery management motherboard 2.

[0042] The shock absorber 32 can be provided in a spring-type, flexible gasket-type, or other configurations. The shock absorber 32 should be securely fixed to the battery management device to ensure stable support for the first connector 31. During installation, the shock absorber 32 can be connected to the housing 1 using bolts, snaps, adhesive, or other fasteners. An appropriate connection method should also be employed between the shock absorber 32 and the first connector 31 to ensure the first connector 31 is securely mounted on the shock absorber 32. Alternatively, the first connector 31 can be directly secured to press the shock absorber 32 against the battery management device.

[0043] Optionally, the shock absorber 32 may utilize a flexible gasket structure. In this case, it may be made of materials with excellent shock absorption and energy absorption properties, such as rubber, silicone, or polyurethane. These materials can effectively absorb and disperse vibration energy, reducing the impact on the connector. The shock absorber 32, configured with a flexible gasket structure, has the advantages of simple structure, low cost, and ease of installation. During the specific design, the structure of the shock absorber 32 can be customized based on the shape, size, and weight of the connector, as well as the expected vibration environment. For example, a suitable rubber pad can be customized based on the size and shape of the first connector 31. The rubber pad should have a certain thickness and elasticity to ensure that it can effectively absorb vibration energy. The rubber pad is then fixed to the housing 1 of the battery management device. Fasteners such as bolts or clips can be used to tightly connect the rubber pad to the housing 1. The connector is then mounted on the rubber pad. The connector should be firmly placed on the rubber pad, ensuring a certain contact area and tightness between the connector and the rubber pad.

[0044] Based on the battery management device of this embodiment, a first connector 31 electrically connected to the battery management mainboard 2 is provided. When connected to the battery cell module 5, the first connector 31 can be used to directly plug and connect with the second connector 53 on the battery cell module 5, thereby completing the telecommunications interconnection between the battery cell module 5 and the battery management mainboard 2. Compared with the traditional method of connecting with multiple sets of wires, this solution brings together multiple lines on the battery management mainboard 2 to the first connector 31, and brings together multiple lines of the battery cell mainboard 52 to the second connector 53. During assembly, the first connector 31 and the second connector 53 can be directly plugged and connected without consuming too much wire. This simplifies the connection structure between the battery management device and the battery cell module 5, reduces the number of wires and connection points, means that potential failure points are reduced, and reliability performance is improved.

[0045] At the same time, when the battery management mainboard 2 or the battery cell module 5 needs to be replaced or upgraded, it is only necessary to simply plug or unplug the connector without having to remove and connect multiple wires one by one, which greatly improves the convenience of maintenance and upgrades.

[0046] In addition, this solution incorporates a shock absorber 32 for securing the first connector 31. This absorbs vibrations and absorbs energy for the first connector 31. In vibrating operating environments, this effectively reduces vibration transmission between the housing 1 and the first connector 31, improving the stability of the first connector 31 and thereby ensuring the reliable connection between the first connector 31 and the second connector 53. The advantages of this solution's shock absorber 32 are particularly pronounced in high-vibration operating environments, such as drones, agricultural machinery, and electric vehicles, where the power supply system is subject to frequent vibrations for extended periods.

[0047] In one embodiment, the connector assembly 3 is directly fixed to the housing 1 .

[0048] Connector assembly 3, directly fixed to housing 1, simplifies the internal structure of the battery management device. By eliminating intermediate connectors or fixing structures, the assembly process of the entire device becomes more direct and efficient, reducing manufacturing costs and complexity. Secondly, direct fixing ensures the stability of connector assembly 3. As the main supporting structure of the battery management device, housing 1 generally has high rigidity and strength. By directly fixing connector assembly 3 to housing 1, the mechanical properties of housing 1 can be utilized to enhance the stability of the connector, reducing the risk of loosening or damage caused by vibration or external impact.

[0049] In one embodiment, the connector assembly 3 is fixed to the inner wall of the housing 1; the housing 1 is provided with a through hole 121 corresponding to the first connector 31, and the first connector 31 can be plugged and connected to the second connector 53 through the avoidance of the through hole 121.

[0050] By arranging the connector assembly 3 inside the housing 1, the housing 1 can provide reliable protection for it and reduce the risk of damage to the connector by impact. At the same time, no additional fixings or connecting parts are required on the outside of the housing 1 to fix the connector assembly 3, making the overall structure more compact and beautiful.

[0051] The design of the through hole 121 enables the first connector 31 to be easily plugged and connected with the second connector 53 on the battery module 5. In the specific design, the first connector 31 can be completely set in the shell 1, and the second connector 53 needs to be inserted into the through hole 121 to connect with the first connector 31 when plugging in; or the plug-in part of the first connector 31 can extend out of the shell 1 through the through hole 121, so that it can be easily docked with the second connector 53.

[0052] In another embodiment, the connector assembly 3 is fixed to the outer wall of the shell 1, the shell 1 is provided with a wire hole, the battery management mainboard 2 is connected to a wire, the wire extends out of the shell 1 through the wire hole and is electrically connected to the first connector 31.

[0053] The connector assembly 3 is fixed to the outer wall of the housing 1 so that the position of the connector assembly 3 can be more flexibly adjusted according to actual needs. The connector assembly 3 can be fixed using screws, clips, or other fastening devices. The wire hole is used to pass wires to connect the first connector 31 to the battery management motherboard 2. The size of the wire hole should be sufficient to pass the wires, while avoiding excessive size that may reduce the sealing performance. A sealing structure (such as a sealing ring, sealant, etc.) is provided around the wire hole to prevent dust, moisture, etc. from the external environment from penetrating into the interior of the housing 1.

[0054] In another embodiment, the connector assembly 3 is fixed on the battery management main board 2 and is indirectly fixed to the housing 1 through the battery management main board 2; a through hole 121 corresponding to the first connector 31 is provided on one side of the housing 1, and the avoidance of the through hole 121 enables the first connector 31 to be plugged and connected with the second connector 53.

[0055] By disposing the connector assembly 3 on the battery management mainboard 2, the connector assembly 3 and the battery management mainboard 2 are overlapped. Therefore, the shape and size of the inner cavity of the housing 1 only need to be set according to the shape and size of the battery management mainboard 2, and there is no need to provide more space to accommodate the connector separately. Therefore, this structure is conducive to the miniaturization of the outer dimensions of the housing 1 and the compactness of the internal structure. In addition, the connector assembly 3 fixed to the battery management mainboard 2 more conveniently facilitates the electrical interconnection between the first connector 31 and the battery management mainboard 2.

[0056] Similarly, the design of the through hole 121 enables the first connector 31 to be easily plugged and connected with the second connector 53 on the battery module 5. In the specific design, the first connector 31 can be completely set in the shell 1, and the second connector 53 needs to be inserted into the through hole 121 to connect with the first connector 31 when plugging in; or the plug-in part of the first connector 31 can extend out of the shell 1 through the through hole 121, so that it can be easily docked with the second connector 53.

[0057] In one embodiment, the housing 1 includes a heat dissipation back shell 11 and a bottom cover 12 , wherein the heat dissipation back shell 11 and the bottom cover 12 enclose a mounting cavity capable of accommodating the battery management motherboard 2 ; the battery management motherboard 2 is fixed to the heat dissipation back shell 11 .

[0058] The housing 1 is designed to consist of two parts: a heatsink backshell 11 and a bottom cover 12. Together, they form a mounting cavity for the battery management motherboard 2. This cavity not only provides stable support for the battery management motherboard 2 but also enhances the system's heat dissipation performance through the heatsink backshell 11. Heatsink backshell 11 is typically made of a material with good thermal conductivity, such as aluminum alloy, and can quickly transfer heat generated by the battery management motherboard 2 to the external environment, maintaining stable operation of the battery management motherboard 2.

[0059] Optionally, a thermal interface material such as a thermal pad or thermal adhesive is provided between the heat dissipation back shell 11 and the battery management mainboard 2 to ensure that heat can be smoothly conducted to the heat dissipation back shell 11 .

[0060] The battery management motherboard 2 should be firmly fixed on the heat dissipation back shell 11 to ensure its stability and reliability during operation. The motherboard can be fixed on the heat dissipation back shell 11 using screws, buckles or other suitable fixing methods.

[0061] In one embodiment, the heat dissipation back shell 11 is provided with heat dissipation fins 111 .

[0062] The heat dissipation fins 111 can significantly increase the surface area of ​​the heat dissipation back shell 11, thereby more effectively conducting the heat generated by the battery management mainboard 2 to the air, thereby achieving rapid heat dissipation.

[0063] In one embodiment, the connector assembly 3 further includes a locking bolt 33, a first through hole 313 is provided on the first connector 31, and a second through hole 321 is provided on the shock absorber 32, and the locking bolt 33 passes through the first through hole 313 and the second through hole 321 and is threadedly locked to the housing 1 or the battery management main board 2; moreover, the first through hole 313 is a smooth hole; and / or, the part of the locking bolt 33 corresponding to the first through hole 313 is a smooth rod.

[0064] The first connector 31 and the shock absorber 32 are fixed to the housing 1 or the battery management mainboard 2 using locking bolts 33, which has the advantages of good fixing reliability and easy installation. Moreover, it can ensure that the shock absorber 32 is in close contact with the first connector 31, so that the shock absorber 32 can provide repeated shock-absorbing and energy-absorbing effects for the first connector 31.

[0065] The locking bolt 33 is fixed to the housing 1 or the battery management board 2. This means that vibrations from the housing 1 or the battery management board 2 are directly transmitted to the locking bolt 33. In this solution, the first through-hole 313 is configured as a blank hole, and / or the portion of the locking bolt 33 corresponding to the first through-hole 313 is configured as a blank rod. This means that after installation, there is no threaded engagement between the first through-hole 313 and the locking bolt 33. This allows the first connector 31 to move slightly relative to the locking bolt 33, effectively preventing the locking bolt 33 from fully transmitting vibrations to the first connector 31, allowing the shock absorber 32 to effectively absorb shock and energy.

[0066] In one embodiment, a third through hole 21 is provided on the battery management main board 2, and a threaded hole is provided on the heat dissipation back shell 11. The locking bolt 33 passes through the first through hole 313, the second through hole 321 and the third through hole 21 in sequence and is threadedly locked to the threaded hole.

[0067] This method secures the connector assembly 3 to the battery management motherboard 2, achieving an overlapping arrangement of the two and a more compact internal structure of the battery management device. Furthermore, the threaded holes for the threaded locking bolts 33 are provided in the heat dissipation back shell 11, which is made of a more durable and reliable material. This ensures the reliability of the threaded connection of the locking bolts 33, thereby ensuring the reliable fixation of the connector assembly 3.

[0068] In one embodiment, a waterproof ring 4 is provided on one side of the housing 1 for fitting with the battery module 5. The waterproof ring 4 is arranged around the first connector 31. The waterproof ring 4 can fit tightly against the surface of the battery module 5 to seal the first connector 31 and the second connector 53 after plug-connection.

[0069] Specifically, regarding the fixation of the waterproof ring 4, a groove surrounding the first connector 31 can be set on the outer wall of the shell 1, and the waterproof ring 4 can be snapped into the groove for fixation. It can also be fixed by gluing, or it can be fixed by a combination of snapping and gluing.

[0070] After the battery management device of this embodiment is inserted into the cell module 5, the waterproof ring 4 adheres tightly to the surface of the cell module 5, forming an effective sealing barrier. This ensures a tight seal at the interface between the first connector 31 and the second connector 53, preventing the intrusion of moisture and humidity. The presence of the waterproof ring 4 not only improves waterproof performance but also enhances the overall reliability of the connector. It can absorb and disperse vibrations transmitted between the cell module 5 and the battery management device to a certain extent, protecting the electronic components within the battery management device from damage.

[0071] In one embodiment, the first connector 31 includes a flexible flat cable, a circuit board 311 and a plug-in terminal 312, the plug-in terminal 312 is fixed on the circuit board 311, the circuit board 311 is fixed on the shock absorber 32, and the flexible flat cable electrically connects the circuit board 311 and the battery management mainboard 2.

[0072] Flexible flat cables are a highly flexible and reliable circuit connection material, enabling complex circuit connections within limited space. In this embodiment, they electrically connect the circuit board 311 to the battery management motherboard 2. Their flexibility allows them to adapt to various shapes and sizes while minimizing space requirements. Importantly, the flexible flat cables effectively isolate vibrations between the circuit board 311 and the housing 1 or battery management motherboard 2, allowing the shock absorber 32 to fully utilize its shock absorption and energy absorption capabilities.

[0073] The circuit board 311 is the core component of the first connector 31. It integrates various electronic components and circuit wiring to achieve specific electrical functions. The circuit board 311 provides a mounting base for the plug-in terminals 312, allowing the plug-in terminals 312 to be securely fixed to the circuit board 311. The plug-in terminals 312 are key components for achieving electrical connection in the first connector 31 and typically have a specific shape and size to mate with and connect to the corresponding second connector 53.

[0074] On the other hand, this embodiment refers to Figure 5-7 , also provides a battery, including a battery cell module 5 and the above-mentioned battery management device, the battery cell module 5 includes a battery cell 51, a sensor, a battery cell main board 52 and a second connector 53, the battery cell main board 52 is electrically connected to the sensor, the battery cell main board 52 is electrically connected to the second connector 53, and the second connector 53 is plugged into the first connector 31 on the battery management device.

[0075] Sensors are installed within the battery cells 51 to collect various operating information from the cells 51, including but not limited to temperature, pressure, current, and voltage. The battery mainboard 52 serves as the control center within the battery module 5, processing the data collected by the sensors and executing the corresponding control strategies. The sensors connect to the battery mainboard 52 and upload the collected information to it. Once the battery management device is plugged into and secured to the battery module 5, the battery mainboard 52 transmits the collected signals to the battery management mainboard 2 via the second connector 53 and the first connector 31.

[0076] Similarly, based on the battery management device of this embodiment, the battery of this embodiment has the advantages of low cost, good reliability and good durability. The battery module 5 and the battery management device have the advantage of simple docking operation.

[0077] In one embodiment, the battery module 5 further includes a battery housing 54 , and the battery cell 51 and the battery mainboard 52 are both installed in the battery housing 54 ; the housing 1 of the battery management device is fastened to the battery housing 54 by mounting bolts 6 .

[0078] The battery housing 54 can effectively protect the battery cell 51 , the battery motherboard 52 , the sensor and other internal components from external adverse factors such as physical impact, moisture, dust and the like.

[0079] Mounting bolts 6 provide a strong locking force, ensuring a secure connection between the battery management device's housing 1 and the battery housing 54. This connection maintains stability even under vibration or impact, preventing damage to the first connector 31 and the second connector 53 from excessive force. By connecting with mounting bolts 6, the battery management device can be easily installed on the battery housing 54 and easily disassembled and maintained when necessary. Specifically, a connection hole can be provided in the housing 1, and a corresponding threaded mounting hole can be provided in the battery housing 54. Mounting bolts 6 are passed through the connection hole and then locked into the threaded mounting hole.

[0080] On the other hand, a drone is provided, comprising the above-mentioned battery.

[0081] Similarly, based on the battery of this embodiment, the power supply system of the drone of this embodiment has the advantages of low cost, good reliability and good durability. The battery module 5 and the battery management device have the advantage of simple docking operation.

[0082] In the description herein, it should be understood that the terms "upper," "lower," "left," "right," and other positions or relationships are used solely for ease of description and simplified operation, and are not intended to indicate or imply that the devices or components referred to must have, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on this application. Furthermore, the terms "first" and "second" are used solely for descriptive purposes and have no special meaning.

[0083] Throughout this specification, references to terms such as "one embodiment" and "example" indicate that a specific feature, structure, material, or characteristic described in conjunction with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, schematic representations of these terms do not necessarily refer to the same embodiment or example.

[0084] In addition, it should be understood that although this specification is described in terms of implementation methods, not every implementation method contains only one independent technical solution. This narrative method of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other implementation methods that can be understood by those skilled in the art.

[0085] The technical principles of the present application have been described above in conjunction with specific embodiments. These descriptions are intended solely to explain the principles of the present application and are not to be construed in any way as limiting the scope of protection of the present application. Based on the explanations herein, those skilled in the art will be able to devise other specific implementations of the present application without inventive effort, and such implementations will fall within the scope of protection of the present application.

Claims

1. A battery management device, characterized in that: include: Housing (1); A battery management mainboard (2) is fixed in the housing (1); A connector assembly (3) comprises a first connector (31) and a shock absorbing member (32), wherein the first connector (31) is fixed to the shock absorbing member (32), and the shock absorbing member (32) is fixed to the housing (1), and the shock absorbing member (32) absorbs shock and absorbs energy of the first connector (31); the first connector (31) is electrically connected to the battery management mainboard (2); and the first connector (31) can be plugged into and connected to a second connector (53) on a battery module (5), thereby achieving electrical connection between the battery module (5) and the battery management mainboard (2).

2. The battery management device according to claim 1, characterized in that: The connector assembly (3) is fixed to the inner wall of the housing (1); the housing (1) is provided with a through hole (121) corresponding to the first connector (31), and the first connector (31) can be plug-connected with the second connector (53) by avoiding the through hole (121).

3. The battery management device according to claim 1, characterized in that: The connector assembly (3) is fixed to the outer wall of the housing (1); the housing (1) is provided with a wire hole; the battery management mainboard (2) is connected to a wire; the wire extends out of the housing (1) through the wire hole and is electrically connected to the first connector (31).

4. The battery management device according to claim 1, characterized in that: The connector assembly (3) is fixed to the battery management mainboard (2) and fixed to the housing (1) through the battery management mainboard (2); a through hole (121) corresponding to the first connector (31) is provided on one side of the housing (1); the first connector (31) can be plugged and connected to the second connector (53) by avoiding the through hole (121).

5. The battery management device according to claim 1, characterized in that: The housing (1) comprises a heat dissipation back shell (11) and a bottom cover (12); the heat dissipation back shell (11) and the bottom cover (12) enclose a mounting cavity capable of accommodating the battery management mainboard (2); and the battery management mainboard (2) is fixed to the heat dissipation back shell (11).

6. The battery management device according to claim 5, characterized in that: The heat dissipation back shell (11) is provided with heat dissipation fins (111).

7. The battery management device according to claim 5, characterized in that: The connector assembly (3) further includes a locking bolt (33); the first connector (31) is provided with a first through hole (313); the shock absorber (32) is provided with a second through hole (321); the locking bolt (33) passes through the first through hole (313) and the second through hole (321) and is threadedly locked to the housing (1) or the battery management mainboard (2); and the first through hole (313) is a light hole; and / or the portion of the locking bolt (33) corresponding to the first through hole (313) is a light rod.

8. The battery management device according to claim 7, characterized in that: The battery management mainboard (2) is provided with a third through hole (21), the heat dissipation back shell (11) is provided with a threaded hole, and the locking bolt (33) sequentially passes through the first through hole (313), the second through hole (321), and the third through hole (21) and is threadedly locked to the threaded hole.

9. The battery management device according to claim 1, characterized in that: A waterproof ring (4) is provided on one side of the housing (1) for contacting the battery module (5); the waterproof ring (4) is provided around the first connector (31); the waterproof ring (4) can be closely attached to the surface of the battery module (5) to seal the first connector (31) and the second connector (53) after being plugged in and connected.

10. The battery management device according to claim 1, characterized in that: The first connector (31) comprises a flexible flat cable, a circuit board (311) and a plug-in terminal (312); the plug-in terminal (312) is fixed on the circuit board (311); the circuit board (311) is fixed on the shock-absorbing component (32); and the flexible flat cable electrically connects the circuit board (311) and the battery management mainboard (2).

11. A battery, characterized in that: The invention comprises a battery cell module (5) and a battery management device according to any one of claims 1 to 10, wherein the battery cell module (5) comprises a battery cell (51), a sensor, a battery cell mainboard (52) and a second connector (53), wherein the battery cell mainboard (52) is electrically connected to the sensor, the battery cell mainboard (52) is electrically connected to the second connector (53), and the second connector (53) is plug-connected to the first connector (31) on the battery management device.

12. The battery according to claim 11, characterized in that The battery module (5) further comprises a battery housing (54), wherein the battery cell (51) and the battery mainboard (52) are both installed in the battery housing (54); and the housing (1) of the battery management device is fastened to the battery housing (54) via mounting bolts (6).

13. A drone, characterized in that: A battery comprising the battery according to claim 11 or 12.

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