Battery pack and vehicle

Abstract

The application provides a battery pack and a vehicle. The battery pack comprises a plurality of battery groups, the plurality of battery groups comprising a fixed battery group and a movable battery group, the fixed battery group being electrically connected with the movable battery group; and a driving mechanism connected with the movable battery group, the driving mechanism being configured to drive the movable battery group to move relative to the fixed battery group to change the center of gravity of the battery pack. By adjusting the positional relationship between the fixed battery group and the movable battery group by using the driving mechanism, the center of gravity of the battery pack is changed, and the center of gravity of the vehicle equipped with the battery pack is also adjusted synchronously, thereby improving the running stability of the vehicle. By reusing the battery pack as a counterweight in the vehicle, the center of gravity of the vehicle is adjusted by using the battery pack, so that the difficulty of adjusting the center of gravity of the vehicle is reduced, and the operation convenience is improved.

Description

[0001] This application claims priority to Chinese Patent Application No. 202521430572.3, filed on July 8, 2025, the entire contents of which are incorporated herein by reference. Technical Field

[0002] This application relates to the field of battery technology, specifically to a battery pack and a vehicle. Background Technology

[0003] Existing battery packs are typically integrated units with a fixed center of gravity. However, in equipment requiring high-precision balance control (such as aircraft), a fixed battery pack center of gravity can lead to instability or operational inconvenience during operation. Utility Model Content

[0004] Embodiments of this application provide a battery pack and a vehicle, wherein the battery pack can be flexibly adjusted in the position of its center of gravity according to actual needs, so as to improve at least some of the above-mentioned technical problems.

[0005] In a first aspect, embodiments of this application provide a battery pack, comprising: Multiple battery packs, including a fixed battery pack and a mobile battery pack, wherein the fixed battery pack is electrically connected to the mobile battery pack; and A drive mechanism, connected to the movable battery pack, is configured to drive the movable battery pack to move relative to the fixed battery pack to change the center of gravity of the battery pack.

[0006] In the battery pack provided in this application embodiment, the fixed battery pack can provide a continuous and stable energy input to the vehicle, ensuring energy supply. The movable battery pack can also provide energy to the vehicle. Since the movable battery pack can be positioned relative to the fixed battery pack, the positional relationship between the fixed and movable battery packs can be adjusted using a drive mechanism, thereby changing the center of gravity of the battery pack. The center of gravity of the vehicle equipped with the battery pack is also adjusted synchronously, improving the stability of the vehicle's operation. By reusing the battery pack as a counterweight in the vehicle and using the battery pack to adjust the center of gravity of the vehicle, the difficulty of adjusting the center of gravity of the vehicle is reduced, and the ease of operation is improved.

[0007] In one embodiment, the battery pack includes at least one independent battery module with independent power supply capability.

[0008] Each independent battery module has the ability to output power independently. The battery pack includes independent battery modules, thereby realizing a modular design and reducing the design and manufacturing difficulty of the battery pack.

[0009] In one embodiment, the independent battery module includes two clamping plates arranged opposite each other and a plurality of battery cells clamped between the two clamping plates; the independent battery module also includes a busbar connected to the battery cells.

[0010] Through the above technical solution, there are multiple battery cells, which improves the energy of the independent battery module. All battery cells are clamped between two plates for fixation. At the same time, by using a busbar to connect with each battery cell, electrical connection between the battery cells is achieved, thereby enabling the independent battery module to have the ability to supply power independently.

[0011] In one embodiment, in the fixed battery pack, the busbar is a first busbar, which includes a first body, a first connecting piece, and a first welding piece connected in sequence. The first body has a first through hole, the first connecting piece and the first welding piece are located in the first through hole, and the first welding piece is welded to the battery cell.

[0012] Through the above technical solution, the first body can serve as a support structure. By fixing the first body, the entire first busbar can be fixed. The first connecting piece and the first welding piece are located in the first through hole of the first body. The first body can protect the first connecting piece and the first welding piece. The first welding piece is welded to the battery cell to realize the conduction of the circuit between the first busbar and the battery cell. The first welding piece is connected to the first body through the first connecting piece, that is, the first welding piece is suspended in the first through hole through the first connecting piece. The first connecting piece has a certain elastic deformation capacity, which allows the first welding piece to adapt well to the installation tolerance of the battery cell in the extension direction of the battery cell, thereby improving the welding effect between the first welding piece and the battery cell.

[0013] In one embodiment, in the mobile battery pack, the busbar is a second busbar, which includes a second body, a second connecting piece, and a second welding piece connected in sequence. The second welding piece is located on one side of the second body, the second connecting piece extends away from the second body and connects the second body and the second welding piece, and the second welding piece is welded to the battery cell.

[0014] By designating the busbar in the mobile battery pack as a second busbar, the second body of the second busbar can serve as a supporting structure. The second body can be fixed in place, while the second welding piece is welded to the battery cell, enabling circuitry between the second busbar and the cell. The second welding piece and the second body are not on the same plane; the second welding piece is connected to the second body via a second connecting piece. The second connecting piece has a certain elastic deformation capability, allowing it to swing and bend relative to the second body, thus reducing the risk of separation between the welding piece and the cell, improving connection reliability, and lowering the risk of failure.

[0015] In one embodiment, the battery cell is a secondary battery cell.

[0016] If the battery cell is a rechargeable cell, then the battery pack is a rechargeable battery. Rechargeable batteries can be repeatedly charged and discharged, enabling multiple uses and reducing costs.

[0017] In one embodiment, the busbar is disposed on the side of the busbar facing away from the battery cell, and a clearance hole is provided on the clamping plate, through which the battery cell is connected to the busbar.

[0018] By placing the busbar on the side of the clamp away from the battery cell, the clamp is positioned between the battery cell and the busbar. The battery cell and the busbar can not only be separated by the clamp, but the clamp can also support the busbar and position it. A clearance hole is provided on the clamp, through which the battery cell connects to the busbar, thereby enabling current transmission.

[0019] In one embodiment, the independent battery module further includes an insulating sheet fixed to the clamp and covering the busbar, the busbar being located between the insulating sheet and the clamp.

[0020] The busbar is sandwiched between the insulating sheet and the clamp, which not only protects the busbar but also reduces the risk of short circuits.

[0021] In one embodiment, the independent battery module further includes a first pull rod that passes through the two clamping plates and the insulating sheet and is fixedly connected to the two clamping plates and the insulating sheet.

[0022] The two clamping plates and the insulating sheet are fixed by using the first pull rod, and the two clamping plates clamp and fix the battery cell.

[0023] In one embodiment, the independent battery module further includes a pull bar located around the two clamping plates and fixedly connected to the two clamping plates.

[0024] By setting pull bars to fix the two clamping plates together from the periphery, the two clamping plates can also be used to clamp and fix the battery cell.

[0025] In one embodiment, the battery pack includes a plurality of individually connected battery modules and a second pull rod that passes through all the individually connected battery modules and secures all the individually connected battery modules together.

[0026] A battery pack is obtained by using a second tie rod to fix multiple independent battery modules together.

[0027] In one embodiment, the battery pack further includes a connector, through which the fixed battery pack and the mobile battery pack are electrically connected. The connector includes a flexible wire and a charging interface, a discharging interface, a shorting interface, and a communication interface connected to the flexible wire.

[0028] The stationary battery pack and the mobile battery pack are connected by a connector with flexible wires, which facilitates the movement of the mobile battery pack compared to the stationary battery pack.

[0029] In one embodiment, the battery pack further includes a battery management system module, which is disposed on the fixed battery pack, and both the fixed battery pack and the mobile battery pack are connected to the battery management system module.

[0030] The battery management system (BMS) module adopts an integrated modular design, connecting both fixed and mobile battery packs to it for easy installation and replacement. Furthermore, the BMS module can monitor the temperature of each battery pack in real time; during operation, it can also monitor the total voltage, total current, capacity, and status information of the battery packs in real time.

[0031] In one embodiment, the battery management system module includes an electrically connected BMS control board and a BMS acquisition board, both of which are electrically connected to the fixed battery pack and the mobile battery pack.

[0032] Based on different functions, the battery management system module is divided into two parts, control and data acquisition, and designed separately to reduce the design difficulty of the battery management system module.

[0033] In one embodiment, the battery pack further includes a carrier, the fixed battery pack is fixedly disposed on the carrier, the movable battery pack is movably disposed on the carrier, and the driving mechanism includes a driving member connected to the movable battery pack and used to drive the movable battery pack to move on the carrier.

[0034] By setting up a carrier to support the fixed battery pack and the mobile battery pack, and using a drive mechanism to move the mobile battery pack on the carrier to shorten or increase the distance between the fixed battery pack and the mobile battery pack, the center of gravity of the battery pack can be effectively controlled.

[0035] In one embodiment, the carrier is a guide rod, the mobile battery pack has a through hole, the guide rod passes through the through hole, and the driving member is used to drive the mobile battery pack to slide on the guide rod.

[0036] The sliding mechanism allows for rapid changes in the distance between the fixed and moving battery packs, enabling quick adjustment of the battery pack's center of gravity and improving response speed.

[0037] In one embodiment, the drive mechanism further includes a screw arranged parallel to the guide rod at a distance, the screw being threadedly connected to the movable battery pack, and the drive member being connected to the screw and used to drive the screw to rotate.

[0038] Because the screw has a self-locking function, the mobile battery pack can be locked in a fixed position, thereby enabling precise adjustment of the battery pack's center of gravity.

[0039] Secondly, embodiments of this application provide a vehicle including the aforementioned battery pack.

[0040] The aircraft includes the aforementioned battery pack, and therefore possesses all the beneficial effects of the aforementioned battery pack, which will not be elaborated upon here. Attached Figure Description

[0041] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0042] Figure 1 This is a three-dimensional structural diagram of the battery pack provided in an embodiment of this application; Figure 2 This is a front view schematic diagram of the fixed battery pack structure provided in an embodiment of this application; Figure 3 This is a front view schematic diagram of the movable battery pack in the battery pack provided in an embodiment of this application; Figure 4 This is a three-dimensional structural diagram of an independent battery module in a battery pack provided in an embodiment of this application; Figure 5 This is an exploded structural diagram of an independent battery module in a battery pack provided in an embodiment of this application; Figure 6 yes Figure 5 Enlarged view of section A; Figure 7 This is a three-dimensional structural schematic diagram of a second busbar in a battery pack provided in an embodiment of this application; Figure 8 This is a three-dimensional structural schematic diagram of another second busbar in a battery pack provided in an embodiment of this application; Figure 9 This is a schematic diagram of the structure of the aircraft provided in the embodiments of this application.

[0043] Explanation of reference numerals in the attached figures: 100. Battery pack; 10. Battery assembly; 101. Fixed battery assembly; 102. Movable battery assembly; 1021. Mounting through hole; 1. Independent battery module; 11. Clamping plate; 111. Clearance hole; 12. Battery cell; 13. Busbar; 131. First busbar; 1311. First body; 1312. First through hole; 1313. First connecting piece; 1314. First welding piece; 132. Second busbar; 1321. Second body Body; 1322, Second connecting piece; 1323, Second welding piece; 14, Insulating piece; 15, First pull rod; 16, Pull bar; 2, Second pull rod; 30, Carrier; 40, Connector; 401, Charging interface; 402, Discharging interface; 403, Shorting interface; 404, Communication interface; 405, Flexible wire; 50, Battery Management System Module; 501, BMS Control Board; 502, BMS Acquisition Board; 200, Vehicle. Detailed Implementation

[0044] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0045] Furthermore, it should be understood that the specific embodiments described herein are for illustrative and explanatory purposes only and are not intended to limit the scope of this application. In this application, unless otherwise stated, directional terms such as "upper" and "lower" generally refer to the upper and lower positions of the device in its actual use or operation, specifically the directions shown in the accompanying drawings; while "inner" and "outer" refer to the outline of the device.

[0046] The terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the stated features. In the description of this application, "a plurality of" means two or more, unless otherwise explicitly specified.

[0047] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection, an electrical connection, or a connection that allows communication between them; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication between two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0048] The terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0049] In the description of the embodiments of this application, the words "example" or "for example" are used to indicate exemplification, illustration, or description. Any embodiment or design described as "example" or "for example" in the embodiments of this application is not to be construed as being more preferred or having more advantages than another embodiment or design. The use of the words "example" or "for example" is intended to present relative concepts in a clear manner.

[0050] To facilitate understanding of the present application, the spline curves and arrows used in the reference numerals in the accompanying drawings are explained below: spline curves without arrows indicate solid parts, that is, parts with solid structures; spline curves with arrows indicate virtual parts, that is, parts without solid structures.

[0051] Please see Figure 9Some embodiments of this application provide a vehicle 200 that uses a battery as its power source. The vehicle 200 is a vehicle capable of autonomous or controlled movement in a specific medium. Generally, a vehicle 200 moving in water is an underwater vehicle, a vehicle 200 moving in the air is an airborne vehicle, and a vehicle 200 moving in space is a space vehicle. Taking underwater vehicles as an example, they include, but are not limited to, autonomous underwater vehicles (AUVs), remotely operated underwater vehicles (ROVs), unmanned underwater vehicles, and underwater gliders.

[0052] In the aircraft 200, the battery can serve as both an operating power source and a driving power source. A battery is a device that converts chemical energy into electrical energy. Specifically, the battery is a battery pack 100. The battery pack 100 typically includes multiple battery cells (i.e., battery cells) connected in series or parallel, thus increasing the capacity of the battery pack 100. Optionally, the battery pack 100 includes multiple battery modules connected in series or parallel, and each battery module includes multiple battery cells connected in series or parallel.

[0053] During its movement, the vehicle 200 can achieve attitude control in different motion states, such as surfacing, diving, and hovering, by adjusting its center of gravity. The core of center of gravity adjustment lies in changing the internal mass distribution of the vehicle 200 or the position of the external ballast, thereby affecting the balance between buoyancy and gravity and achieving attitude control.

[0054] When the aircraft 200 uses the battery pack 100 as its power source, the battery pack 100 is usually quite heavy. Due to inertia, this makes it more difficult to adjust the center of gravity of the aircraft 200. Therefore, in this embodiment of the application, the battery pack 100 is reused as a counterweight to adjust the center of gravity of the aircraft 200.

[0055] Please see Figure 1 Some embodiments of this application also provide a battery pack 100, and an electrical device includes the battery pack 100.

[0056] The battery pack 100 includes multiple battery packs 10 and a drive mechanism. The multiple battery packs 10 include a fixed battery pack 101 and a movable battery pack 102, the fixed battery pack 101 and the movable battery pack 102 being electrically connected. The drive mechanism is connected to the movable battery pack 102 and is configured to drive the movable battery pack 102 to move relative to the fixed battery pack 101, thereby changing the center of gravity of the battery pack 100.

[0057] Battery pack 10 typically includes multiple electrically connected battery cells 12. There are multiple battery packs 10, specifically at least two. These multiple battery packs 10 include fixed battery packs 101 and movable battery packs 102; in other words, at least one battery pack 10 is a fixed battery pack 101, and at least one battery pack 10 is a movable battery pack 102. However, the number of fixed battery packs 101 and movable battery packs 102 in the battery pack 100 can be one or more. A fixed battery pack 101 refers to a battery pack 101 whose position on the vehicle 200 is fixed when the battery pack 100 is used on the vehicle 200; a movable battery pack 102 refers to a battery pack 102 whose position on the vehicle 200 can change, and the movable battery pack 102 can move relative to the fixed battery pack 101. The fixed battery pack 101 and the mobile battery pack 102 are electrically connected, either in parallel or in series.

[0058] The drive mechanism is connected to the movable battery pack 102. The drive mechanism can drive the movable battery pack 102 to move relative to the fixed battery pack 101. By adjusting the positional relationship between the fixed battery pack 101 and the movable battery pack 102, the center of gravity of the battery pack 100 is changed. It should be noted that the drive mechanism can drive the movable battery pack 102 to slide relative to the fixed battery pack 101, or it can drive the movable battery pack 102 to rotate relative to the fixed battery pack 101.

[0059] In summary, in the battery pack 100 provided in this application embodiment, the fixed battery pack 101 can be used to provide a continuous and stable energy input to the vehicle 200, ensuring energy supply. The movable battery pack 102 can also provide energy to the vehicle 200. Since the movable battery pack 102 can be relative to the fixed battery pack 101, the positional relationship between the fixed battery pack 101 and the movable battery pack 102 can be adjusted using a drive mechanism, thereby changing the center of gravity of the battery pack 100. The center of gravity of the vehicle 200, on which the battery pack 100 is installed, is also adjusted synchronously, improving the operational stability of the vehicle 200. By reusing the battery pack 100 as a counterweight in the vehicle 200 and using the battery pack 100 to adjust the center of gravity of the vehicle 200, the difficulty of adjusting the center of gravity of the vehicle 200 is reduced, and the ease of operation is improved.

[0060] It should be noted that the battery pack 100 can be used to replace the counterweight in the aircraft 200, or it can be used in conjunction with the counterweight in the aircraft 200 to adjust the center of gravity of the aircraft 200.

[0061] Please refer to some embodiments of this application. Figures 1 to 3The battery pack 10 includes at least one independent battery module 1 with independent power supply capability.

[0062] The battery pack 10 includes one or more independent battery modules 1. Here, the battery pack 10 can be a mobile battery pack 102 or a fixed battery pack 101. When there are multiple independent battery modules 1, they are electrically connected in parallel or series. Each independent battery module 1 typically includes multiple electrically connected battery cells 12. That is, multiple battery cells 12 are first assembled into an independent battery module 1, and then the independent battery modules 1 are assembled into the battery pack 10.

[0063] The independent battery module 1 has the ability to independently output electrical energy. The battery pack 10 includes the independent battery module 1, thereby realizing a modular design and reducing the design and manufacturing difficulty of the battery pack 10.

[0064] Please refer to some embodiments of this application. Figure 3 and Figure 4 The independent battery module 1 includes two clamping plates 11 arranged opposite each other and a plurality of battery cells 12 clamped between the two clamping plates 11; the independent battery module 1 also includes a busbar 13, which is connected to the battery cells 12.

[0065] The two clamping plates 11 are arranged opposite each other, meaning they are positioned face-to-face with a gap between them. A space is reserved between the two clamping plates 11 for accommodating the battery cells 12. There can be multiple battery cells 12, the specific number depending on the capacity requirements. Typically, both ends of the battery cell 12 abut against the two clamping plates 11. Optionally, the battery cells 12 are vertically arranged between the two clamping plates 11, and different battery cells 12 can be in contact or spaced apart. To limit the movement of the battery cells 12, a recessed groove is formed on the surface of the clamping plate 11 facing the battery cell 12, and one end of the battery cell 12 extends into the groove and is fitted into it. The busbar 13 is a conductive sheet, such as a metal sheet. The busbar 13 is connected to all the battery cells 12, and can collect the charge of all the battery cells 12, thus outputting energy externally. Of course, externally supplied current can also flow to the battery cells 12 through the busbar 13. There can be one or more busbars 13. Typically, the busbar 13 is mounted on the clamping plate 11, which supports and secures it. Alternatively, the busbar 13 can be directly supported on the battery cell 12. Therefore, the busbar 13 can be positioned between the clamping plate 11 and the battery cell 12, or the clamping plate 11 can be positioned between the busbar 13 and the battery cell 12. Optionally, the two opposite ends of the battery cell 12 are the positive and negative terminals, and different busbars 13 are provided at the opposite ends of the battery cell 12 to connect to the positive and negative terminals, respectively.

[0066] Through the above technical solution, there are multiple battery cells 12, which improves the energy of the independent battery module 1. All battery cells 12 are clamped between two clamping plates 11 for fixation. At the same time, by using the busbar 13 to connect with each battery cell 12, the electrical connection between the battery cells 12 is realized, thereby enabling the independent battery module 1 to have the ability to supply power independently.

[0067] Please refer to some embodiments of this application. Figure 4 The busbar 13 is located on the side of the clamping plate 11 away from the battery cell 12. The clamping plate 11 has a clearance hole 111, and the battery cell 12 is connected to the busbar 13 through the clearance hole 111.

[0068] The number of clearance holes 111 can be one or more. Optionally, the number of clearance holes 111 is equal to the number of battery cells 12, and the clearance holes 111 and battery cells 12 are set in a one-to-one correspondence.

[0069] By placing the busbar 13 on the side of the clamping plate 11 away from the battery cell 12, the clamping plate 11 is positioned between the battery cell 12 and the busbar 13. The battery cell 12 and the busbar 13 can not only be separated by the clamping plate 11, but the clamping plate 11 can also be used to support the busbar 13 and position it. The clamping plate 11 has a clearance hole 111, through which the battery cell 12 connects to the busbar 13, thereby realizing the transmission of current. In some embodiments of this application, cell 12 is a secondary cell. A secondary cell refers to a cell that can convert electrical energy into chemical energy. That is, a secondary cell can discharge to output electrical energy, and it can also be charged to convert electrical energy into chemical energy for storage. Since cell 12 is a secondary cell, the battery pack 100 is a secondary battery. The secondary battery can be repeatedly charged and discharged, enabling multiple uses and reducing costs.

[0070] Please refer to some embodiments of this application. Figure 6 In the fixed battery pack 101, the busbar 13 is the first busbar 131. The first busbar 131 includes a first body 1311, a first connecting piece 1313 and a first welding piece 1314 connected in sequence. The first body 1311 has a first through hole 1312. The first connecting piece 1313 and the first welding piece 1314 are located in the first through hole 1312. The first welding piece 1314 is welded to the battery cell 12.

[0071] Through the above technical solution, the first body 1311 can serve as a support structure. By fixing the first body 1311, the entire first busbar 131 can be fixed. The first connecting piece 1313 and the first welding piece 1314 are located within the first through hole 1312 of the first body 1311. The first body 1311 can protect the first connecting piece 1313 and the first welding piece 1314. The first welding piece 1314 is welded to the battery cell 12, realizing the circuit conduction between the first busbar 131 and the battery cell 12. The first welding piece 1314 is connected to the first body 1311 through the first connecting piece 1313. That is, the first welding piece 1314 is suspended in the first through hole 1312 through the first connecting piece 1313. The first connecting piece 1313 has a certain elastic deformation capability, which allows the first welding piece 1314 to adapt well to the installation tolerance of the battery cell 12 in the extension direction of the battery cell 12 (i.e., the direction from one end of the battery cell 12 to the other end), thereby improving the welding effect between the first welding piece 1314 and the battery cell 12.

[0072] Please refer to some embodiments of this application. Figure 6 The first connecting piece 1313 is a long strip that bends and extends within the first through hole 1312.

[0073] Please refer to some embodiments of this application. Figure 5 and Figure 6 The first body 1311, the first connecting piece 1313, and the first welding piece 1314 are located on the same plane. The number of first through holes 1312 on the first body 1311 is equal to the number of battery cells 12, and there are multiple first through holes 1312. There are also multiple first connecting pieces 1313 and first welding pieces 1314. The first through holes 1312, first connecting pieces 1313, and first welding pieces 1314 are arranged one-to-one, and the first welding pieces 1314 are welded to the battery cells 12 one-to-one. The clamping plate 11 is located between the battery cells 12 and the busbar 13. The clamping plate 11 has clearance holes 111. The first body 1311 is placed on the clamping plate 11, and the first through holes 1312 correspond one-to-one with the clearance holes 111. Please refer to some embodiments of this application. Figure 7 and Figure 8 In the mobile battery pack 102, the busbar 13 is the second busbar 132. The second busbar 132 includes a second body 1321, a second connecting piece 1322 and a second welding piece 1323 connected in sequence. The second welding piece 1323 is located on one side of the second body 1321. The second connecting piece 1322 extends away from the second body 1321 and connects the second body 1321 and the second welding piece 1323. The second welding piece 1323 is welded to the battery cell 12.

[0074] Because the mobile battery pack 102 moves within the battery pack 100, and this movement causes vibrations, the connection between the battery cell 12 and the busbar 13 is prone to failure. By designating the busbar 13 in the mobile battery pack 102 as a second busbar 132, the second body 1321 within the second busbar 132 can serve as a support structure. Fixing the second body 1321 secures the entire second busbar 132. The second welding piece 1323 is welded to the battery cell 12, thus establishing circuit continuity between the second busbar 132 and the battery cell 12. The second welding piece 1323 is not on the same plane as the second body 1321. The second welding piece 1323 is connected to the second body 1321 through the second connecting piece 1322. The second connecting piece 1322 has a certain elastic deformation capability. In particular, the second connecting piece 1322 can swing relative to the second body 1321 and bend and stretch relative to the second body 1321. In this way, when the moving battery pack 102 moves, the second busbar 132 can adapt to the shaking of the cell 12, reducing the risk of the second welding piece 1323 separating from the cell 12, thereby improving the connection reliability and reducing the risk of failure.

[0075] In some embodiments of this application, the clamping plate 11 is located between the battery cell 12 and the busbar 13. The clamping plate 11 has a clearance hole 111. The second body 1321 is disposed on the clamping plate 11, and the second connecting piece 1322 and the second welding piece 1323 extend into the clearance hole 111. Optionally, the second welding piece 1323 and the second body 1321 are parallel to each other, and the second connecting piece 1322 extends obliquely relative to the second body 1321.

[0076] In some embodiments of this application, the number of second busbars 132 located on the same side of the same clamping plate 11 can be one or more. When the number of second busbars 132 is multiple, the shapes of each second busbar 132 can be the same or different. As an example, the clamping plate 11 is provided with such... Figure 7 As shown and as Figure 8 The two different designs of the second busbar 132 are shown.

[0077] Please refer to some embodiments of this application. Figure 5 The independent battery module 1 also includes an insulating sheet 14, which is fixed to the clamping plate 11 and covers the busbar 13. The busbar 13 is located between the insulating sheet 14 and the clamping plate 11. The busbar 13 is clamped between the insulating sheet 14 and the clamping plate 11, which not only protects the busbar 13 but also reduces the risk of short circuits. As an example, the insulating sheet 14 is a plastic sheet, and the clamping plate 11 is a plastic plate.

[0078] In some embodiments of this application, the insulating sheet 14 has an opening, and when there are multiple independent battery modules 1 in the battery pack 10, two adjacent independent battery modules 1 can be electrically connected through the opening.

[0079] Please refer to some embodiments of this application. Figure 5 The independent battery module 1 also includes a first pull rod 15, which passes through two clamping plates 11 and an insulating sheet 14 and is fixedly connected to the two clamping plates 11 and the insulating sheet 14. The first pull rod 15 is used to fix the two clamping plates 11 and the insulating sheet 14, and the two clamping plates 11 clamp and fix the battery cell 12. There can be one or more first pull rods 15. Optionally, there can be multiple first pull rods 15, which are spaced apart. As an example, the first pull rod 15 includes a rod body and threaded ends at both ends of the rod body. The threaded ends at both ends pass through the two clamping plates 11 and are threadedly connected to nuts located on the side of the clamping plates 11 away from the battery cell 12.

[0080] Please refer to some embodiments of this application. Figure 5 The independent battery module 1 also includes a pull bar 16, which is located around the two clamping plates 11 and fixedly connected to them. By setting the pull bar 16 to fix the two clamping plates 11 together from their periphery, the two clamping plates 11 can also clamp and fix the battery cell 12. Optionally, there can be multiple pull bars 16, which are distributed at intervals along the circumference of the two clamping plates 11. As an example, the pull bar 16 is flat and is fixedly connected to the periphery of the clamping plates 11 by screws.

[0081] Please refer to some embodiments of this application. Figure 5 The independent battery module 1 includes both a first pull rod 15 and a pull bar 16, which makes the structure of the independent battery module 1 more stable and reliable.

[0082] Please refer to some embodiments of this application. Figures 1 to 3 The battery pack 10 includes multiple independently connected battery modules 1 and a second tie rod 2. The second tie rod 2 passes through all the independently connected battery modules 1 and secures them together. The battery pack 10 is obtained by using the second tie rod 2 to secure the assembled multiple independently connected battery modules 1 together. The number of independently connected battery modules 1 in the battery pack 10 can be set according to requirements. For example, please refer to... Figure 2 The battery pack 10 is a fixed battery pack 101, which includes seven independent battery modules 1 arranged in sequence. The second pull rod 2 passes through the seven independent battery modules 1 along the direction of their arrangement and fixes them together to form the fixed battery pack 101. For example, please refer to [link to example]. Figure 3The battery pack 10 is a movable battery pack 102, which includes six independent battery modules 1 arranged in sequence. A second pull rod 2 passes through the six independent battery modules 1 along the direction of their arrangement and fixes them together to form the movable battery pack 102. Optionally, the second pull rod 2 is a screw, with nuts connected to both ends, and all the independent battery modules 1 are constrained between the nuts at both ends.

[0083] Please refer to some embodiments of this application. Figure 1 The battery pack 100 also includes a connector 40, through which the fixed battery pack 101 and the mobile battery pack 102 are electrically connected. The connector 40 includes a flexible wire 405 and a charging interface 401, a discharging interface 402, a shorting interface 403, and a communication interface 404 connected to the flexible wire 405. The fixed battery pack 101 and the mobile battery pack 102 are connected via the connector 40 with the flexible wire 405, which facilitates the movement of the mobile battery pack 102 relative to the fixed battery pack 101. The flexible wire 405 is connected to the charging interface 401, the discharging interface 402, the shorting interface 403, and the communication interface 404. As an example, there are four flexible wires 405, which are connected to the charging interface 401, the discharging interface 402, the shorting interface 403, and the communication interface 404, respectively. Typically, the function of the shorting interface 403 is to control whether the battery pack 10 is discharging; when the shorting wire is inserted into the shorting interface 403, the battery pack 10 has an output. The charging interface 401 and the communication interface 404 serve as interfaces for charging and communication of the battery pack 10, allowing for both charging and communication; the discharging interface 402 serves as the output interface of the battery pack 10.

[0084] Please refer to some embodiments of this application. Figure 1 and Figure 2 The battery pack 100 also includes a battery management system module 50, which is mounted on the fixed battery pack 101. Both the fixed battery pack 101 and the mobile battery pack 102 are connected to the battery management system module 50. The battery management system module 50 adopts an integrated modular design, connecting both the fixed battery pack 101 and the mobile battery pack 102 to it, facilitating quick installation and replacement of the battery management system module 50. Furthermore, the battery management system module 50 can perform real-time temperature monitoring of each battery pack 10; and during operation, it can monitor the total voltage, total current, capacity, and status information of the battery pack 10 in real time.

[0085] Please refer to some embodiments of this application. Figure 1 and Figure 2The battery management system module 50 includes a BMS control board 501 and a BMS acquisition board 502 electrically connected to each other. Both the BMS control board 501 and the BMS acquisition board 502 are electrically connected to the fixed battery pack 101 and the mobile battery pack 102. The BMS control board 501 and the BMS acquisition board 502 have different functions. The BMS control board 501 is used to manage the operation of the fixed battery pack 101 and the mobile battery pack 102, while the BMS acquisition board 502 is used to acquire information such as temperature, voltage, and current of the fixed battery pack 101 and the mobile battery pack 102. Based on their different functions, the battery management system module 50 is divided into control and acquisition parts for separate board design, which reduces the design difficulty of the battery management system module 50.

[0086] Please refer to some embodiments of this application. Figure 1 The battery pack 100 also includes a carrier 30. A fixed battery pack 101 is fixedly mounted on the carrier 30, and a movable battery pack 102 is movably mounted on the carrier 30. The drive mechanism includes a drive member connected to the movable battery pack 102 and used to drive the movable battery pack 102 to move on the carrier 30. By using the carrier 30 to support the fixed battery pack 101 and the movable battery pack 102, and by using the drive mechanism to drive the movable battery pack 102 to move on the carrier 30, the distance between the fixed battery pack 101 and the movable battery pack 102 can be shortened or lengthened, thus achieving effective control of the center of gravity of the battery pack 100. As an example, the drive mechanism is an electric drive structure, and the drive member is a motor.

[0087] Please refer to some embodiments of this application. Figure 1 The carrier 30 serves as a guide rod, and a mounting through hole 1021 is provided through the movable battery pack 102. The guide rod passes through the mounting through hole 1021, and a driving component is used to drive the movable battery pack 102 to slide on the guide rod. This sliding method allows for rapid changes in the distance between the fixed battery pack 101 and the movable battery pack 102, enabling the center of gravity of the battery pack 100 to be quickly adjusted and improving response speed. In other embodiments, the carrier 30 can also be a guide cylinder, within which the movable battery pack 102 can slide.

[0088] In some embodiments of this application, the mounting through hole 1021 is a non-circular hole, such as a square hole, and the guide rod is adapted to the mounting through hole 1021. This can reduce the rotation of the mobile battery pack 102 relative to the guide rod, which helps to improve the reliability of the electrical connection between the battery cell 12 and the busbar 13 in the mobile battery pack 102.

[0089] In some embodiments of this application, the drive mechanism further includes a screw arranged parallel to the guide rod at intervals. The screw is threadedly connected to the movable battery pack 102, and the drive member is connected to the screw and used to drive the screw to rotate. In this case, the guide rod synchronously acts as a limiting member, restricting the movable battery pack 102 from rotating with the screw. Thus, the movable battery pack 102 can only move along the direction of the screw's extension to approach or move away from the fixed battery pack 101. Since the screw has a self-locking function, the movable battery pack 102 can be locked in a fixed position, thereby achieving precise adjustment of the center of gravity of the battery pack 100.

[0090] The embodiments of this application have been described in detail above. Specific examples have been used to illustrate the principles and implementation methods of this application. The description of the above embodiments is only for the purpose of helping to understand the method and core ideas of this application. At the same time, for those skilled in the art, there will be changes in the specific implementation methods and application scope based on the ideas of this application. Therefore, the content of this specification should not be construed as a limitation of this application.

Claims

1. A battery pack (100), characterized in that, include: Multiple battery packs (10), including a fixed battery pack (101) and a mobile battery pack (102), wherein the fixed battery pack (101) is electrically connected to the mobile battery pack (102); and A drive mechanism, connected to the movable battery pack (102), is configured to drive the movable battery pack (102) to move relative to the fixed battery pack (101) to change the center of gravity of the battery pack (100).

2. The battery pack (100) according to claim 1, characterized in that, The battery pack (10) includes at least one independent battery module (1) with independent power supply capability.

3. The battery pack (100) according to claim 2, characterized in that, The independent battery module (1) includes two clamping plates (11) arranged opposite to each other and a plurality of battery cells (12) sandwiched between the two clamping plates (11); the independent battery module (1) also includes a busbar (13) connected to the battery cells (12).

4. The battery pack (100) according to claim 3, characterized in that, In the fixed battery pack (101), the busbar (13) is a first busbar (131), which includes a first body (1311), a first connecting piece (1313), and a first welding piece (1314) connected in sequence. The first body (1311) has a first through hole (1312), and the first connecting piece (1313) and the first welding piece (1314) are located within the first through hole (1312). The first welding piece (1314) is welded to the battery cell (12); and / or, In the mobile battery pack (102), the busbar (13) is a second busbar (132), which includes a second body (1321), a second connecting piece (1322), and a second welding piece (1323) connected in sequence. The second welding piece (1323) is located on one side of the second body (1321), and the second connecting piece (1322) extends away from the second body (1321) and connects the second body (1321) and the second welding piece (1323). The second welding piece (1323) is welded to the battery cell (12); and / or, The battery cell (12) is a secondary battery cell.

5. The battery pack (100) according to claim 3, characterized in that, The busbar (13) is disposed on the side of the clamping plate (11) away from the battery cell (12). The clamping plate (11) has a clearance hole (111), and the battery cell (12) is connected to the busbar (13) through the clearance hole (111).

6. The battery pack (100) according to claim 5, characterized in that, The independent battery module (1) also includes an insulating sheet (14), which is fixed on the clamp (11) and covers the busbar (13). The busbar (13) is located between the insulating sheet (14) and the clamp (11).

7. The battery pack (100) according to claim 6, characterized in that, The independent battery module (1) further includes a first pull rod (15), which passes through the two clamping plates (11) and the insulating sheet (14) and is fixedly connected to the two clamping plates (11) and the insulating sheet (14); and / or, the independent battery module (1) further includes a pull bar (16), which is located on the periphery of the two clamping plates (11) and is fixedly connected to the two clamping plates (11).

8. The battery pack (100) according to claim 3, characterized in that, The battery pack (10) includes a plurality of the independent battery modules (1) electrically connected and a second pull rod (2) that passes through all the independent battery modules (1) and secures all the independent battery modules (1) together.

9. The battery pack (100) according to any one of claims 1 to 8, characterized in that, The battery pack (100) also includes a connector (40), through which the fixed battery pack (101) and the mobile battery pack (102) are electrically connected. The connector (40) includes a flexible wire (405) and a charging interface (401), a discharging interface (402), a shorting interface (403), and a communication interface (404) connected to the flexible wire (405).

10. The battery pack (100) according to any one of claims 1 to 8, characterized in that, The battery pack (100) also includes a battery management system module (50), which is disposed on the fixed battery pack (101). Both the fixed battery pack (101) and the mobile battery pack (102) are connected to the battery management system module (50).

11. The battery pack (100) according to claim 10, characterized in that, The battery management system module (50) includes an electrically connected BMS control board (501) and a BMS acquisition board (502), both of which are electrically connected to the fixed battery pack (101) and the mobile battery pack (102).

12. The battery pack (100) according to any one of claims 1 to 8, characterized in that, The battery pack (100) also includes a carrier (30), the fixed battery pack (101) is fixedly disposed on the carrier (30), the movable battery pack (102) is movably disposed on the carrier (30), and the driving mechanism includes a driving member, which is connected to the movable battery pack (102) and used to drive the movable battery pack (102) to move on the carrier (30).

13. The battery pack (100) according to claim 12, characterized in that, The carrier (30) is a guide rod, and the mobile battery pack (102) has a through hole (1021) through it. The guide rod passes through the through hole (1021), and the driving member is used to drive the mobile battery pack (102) to slide on the guide rod.

14. The battery pack (100) according to claim 13, characterized in that, The drive mechanism also includes a screw that is spaced parallel to the guide rod, the screw being threadedly connected to the movable battery pack (102), and the drive member being connected to the screw and used to drive the screw to rotate.

15. A vehicle (200), characterized in that, Includes the battery pack (100) as described in any one of claims 1 to 14.

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