Wiring-free battery pack main positive and negative electrode rapid plugging and unplugging safety connection device

Abstract

The invention belongs to the technical field of battery packs, and discloses a harness-free battery pack main positive and negative electrode rapid plugging safe connecting device which comprises a battery pack shell, a battery cell assembly is arranged in the battery pack shell, a plugging conductive device is arranged at the rear end of the battery pack shell, and the plugging conductive device comprises a PCB mounting plate. The PCB mounting plate is mounted at the rear end of the battery pack shell, a positive electrode plugging terminal and a negative electrode plugging terminal are arranged on the PCB mounting plate, the positive electrode plugging terminal and the negative electrode plugging terminal are used for being connected with a battery rack copper bar plug-in unit, and the PCB mounting plate is connected with a battery cell assembly in the battery pack shell through a wire. According to the scheme, the main positive and negative plugging terminals of the plugging conductive device are connected with the copper bar connector of the battery rack in a conductive manner to replace a traditional wiring harness, so that the potential safety hazard caused by the wiring harness problem is reduced, and as the wiring harness and the connector are reduced, the assembly and disassembly of the battery pack are simpler, and the safety risk caused by improper operation in the maintenance process is reduced.

Description

Technical Field

[0001] The present invention relates to the field of battery packs, and more specifically, to a fast plug - and - unplug safety connection device for the main positive and negative electrodes of a battery pack without wires. Background Art

[0002] In the existing battery pack installation solutions, the electrical conduction between the battery and the battery rack is usually achieved by using the traditional wire harness connection method. However, this connection method has the following technical defects: 1. The traditional wire harness is prone to problems such as aging, wear, or poor contact during long - term use, which may lead to safety accidents such as short - circuit, overheating, or even fire; 2. The fixing and wiring of the wire harness are complex, increasing the difficulty of installation and maintenance. Especially in the scenario of frequent battery replacement, the repeated bending of the wire harness will accelerate its damage. Summary of the Invention

[0003] The purpose of the present invention is to solve the disadvantages existing in the prior art, and to propose a fast plug - and - unplug safety connection device for the main positive and negative electrodes of a battery pack without wires.

[0004] To achieve the above purpose, the present invention adopts the following technical solutions: A fast plug - and - unplug safety connection device for the main positive and negative electrodes of a battery pack without wires, including a battery pack housing. An electric core assembly is arranged inside the battery pack housing. A plug - and - unplug conductive device is arranged at the rear end of the battery pack housing. The plug - and - unplug conductive device includes a PCB mounting board. The PCB mounting board is installed at the rear end of the battery pack housing. A positive - electrode plug - and - unplug terminal and a negative - electrode plug - and - unplug terminal are arranged on the PCB mounting board. The positive - electrode plug - and - unplug terminal and the negative - electrode plug - and - unplug terminal are used to connect with the copper - row plug - in of the battery rack. The PCB mounting board is connected to the electric core assembly inside the battery pack housing through a wire; A roller device is arranged on the outer side of the bottom of the battery pack housing. The roller device is used for the battery pack to slide smoothly on the battery rack.

[0005] As a further scheme of the present invention: A liquid - cooling plate is arranged at the bottom of the battery pack housing.

[0006] As a further scheme of the present invention: A handle is arranged at the front end of the battery pack housing.

[0007] As a further scheme of the present invention: The roller device includes a roller frame. The roller frame is fixedly installed on the side of the battery pack housing. A plurality of rollers are rotatably connected to the roller frame.

[0008] As a further scheme of the present invention: A plurality of auxiliary wheels are rotatably installed on the outer side of the roller frame.

[0009] As a further solution of the present invention: a receiving groove adapted to the PCB mounting board is provided on the battery pack housing corresponding to the PCB mounting board, and a telescopic driving mechanism for driving the PCB mounting board and the plug-in terminals in and out of the receiving groove is provided in the receiving groove.

[0010] As a further solution of the present invention: the telescopic driving mechanism includes an electric telescopic rod fixedly installed in the receiving groove, the telescopic end of the electric telescopic rod is fixedly connected to the PCB mounting board, and a controller for controlling the opening and closing of the electric telescopic rod is provided at the front end of the battery pack housing.

[0011] As a further solution of the present invention: limit blocks are fixedly connected to the surfaces of the PCB mounting boards, limit grooves corresponding to the limit blocks are provided on the inner walls of the receiving grooves, and the limit blocks are slidably connected to the limit grooves.

[0012] As a further solution of the present invention: positioning pins are provided on the battery pack housing and on the outer sides of the positive plug-in terminal and the negative plug-in terminal.

[0013] Compared with the prior art, the advantages of the present invention are as follows: 1. In this solution, the main positive and negative plug-in terminals of the plug-in conductive device are conductively connected to the battery rack copper row connector to replace the traditional wire harness, reducing the potential safety hazards caused by wire harness problems. Since the wire harness and connectors are reduced, the assembly and disassembly of the battery pack are simpler, reducing the safety risks caused by improper operation during maintenance.

[0014] 2. In this solution, there is a pulley device at the bottom of the battery pack, enabling it to slide smoothly on the battery rack. The combination of the quick plug-in and unplug design and the pulley device makes the battery pack more stable during installation and replacement, reducing the risk of collision or damage caused by improper operation.

[0015] 3. In this solution, the receiving groove provides a storage space for the PCB mounting board and the plug-in terminals. When the battery pack is not installed, the plug-in terminals can be retracted into the receiving groove to avoid the impact during transportation and handling, extending the life of the terminals. The telescopic driving mechanism drives the plug-in terminals to expand and contract, realizing automatic plugging and unplugging, and reducing the risk of mechanical damage caused by direct manual operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 is one of the structural schematic diagrams of the present invention; Figure 2 is the second structural schematic diagram of the present invention; Figure 3 is of the present invention Figure 1 the enlarged view at A in; Figure 4 is of the present invention Figure 2 the enlarged view at B in; Figure 5This is a schematic structural diagram of the telescopic drive mechanism of the present invention.

[0017] Explanation of reference numerals in the figure: 1. Battery pack housing; 2. Plug-and-play conductive device; 21. PCB mounting board; 22. Positive plug terminal; 23. Negative plug terminal; 24. Positioning pin; 3. Roller device; 31. Roller frame; 32. Roller; 33. Auxiliary wheel; 4. Liquid cooling plate; 5. Handle; 6. Battery cell assembly; 7. Accommodating groove; 8. Telescopic drive mechanism; 81. Electric telescopic rod; 82. Controller; 83. Limit block; 84. Limit groove. Specific embodiments

[0018] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention; obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention. Embodiment

[0019] Please refer to Figures 1-4 , a wireless harness battery pack main positive and negative quick plug-and-play safety connection device, including a battery pack housing 1, and a battery cell assembly 6 is arranged inside the battery pack housing 1. As Figure 3 shown, a plug-and-play conductive device 2 is arranged at the rear end of the battery pack housing 1. The plug-and-play conductive device 2 includes a PCB mounting board 21. The PCB mounting board 21 is mounted at the rear end of the battery pack housing 1, and a positive plug terminal 22 and a negative plug terminal 23 are arranged on the PCB mounting board 21. The PCB mounting board 21 integrates the positive plug terminal 22 and the negative plug terminal 23. Among them, a PCB (printed circuit board) structure is adopted, so that the positive and negative plug terminals are compactly arranged, reducing the complex wiring of traditional wire harnesses, improving the reliability of electrical connections, and at the same time reducing the short-circuit risk caused by wire harness loosening or aging.

[0020] The positive plug terminal 22 and the negative plug terminal 23 are used to connect with the battery rack copper row plug-in. The design of directly connecting the plug-in type terminal with the battery rack copper row plug-in eliminates the traditional wire harness and connector, making the installation and disassembly of the battery pack faster and more convenient. At the same time, the contact resistance is reduced and the energy transmission efficiency is improved.

[0021] In addition, the PCB mounting board 21 is connected to the battery cell assembly 6 inside the battery pack housing 1 through a wire. There is no exposed wire harness outside, avoiding insulation damage caused by external pulling or friction, and improving safety.

[0022] Further, positioning pins 24 are provided on the battery pack housing 1 and outside the positive plug-in terminal 22 and the negative plug-in terminal 23, which can ensure that the battery pack slides accurately on the battery rack to align with the copper bus connectors of the battery rack and make them conduct.

[0023] As Figure 4 shown, a roller device 3 is provided on the outer side of the bottom of the battery pack housing 1. The roller device 3 is used for the battery pack to slide smoothly on the battery rack. Among them, the roller device 3 includes a roller frame 31. The roller frame 31 is fixedly installed on the side of the battery pack housing 1, and a plurality of rollers 32 are rotatably connected to the roller frame 31.

[0024] The roller device 3 enables the battery pack to be easily pushed into or pulled out on the battery rack, reducing the burden of manual handling. At the same time, it avoids collisions or misalignments caused by improper operations and improves operation safety. During the plugging and unplugging process, the rollers 32 can guide the battery pack to move along a fixed track to ensure accurate docking of the plug-in terminals with the copper bus connectors of the battery rack and avoid the risks of poor contact or arcing caused by misalignment. In addition, a plurality of auxiliary wheels 33 are rotatably installed on the outer side of the roller frame 31, and the outer peripheral surface of the auxiliary wheels 33 is used for rolling cooperation with the side wall of the battery rack.

[0025] As Figure 2 shown, a liquid cooling plate 4 is provided at the bottom of the battery pack housing 1, which can efficiently take away the heat generated during the charging and discharging of the battery, prevent the battery from overheating, and extend the service life of the battery cells. A handle 5 is provided at the front end of the battery pack housing 1, which is convenient for the operator to quickly grasp and apply force, and cooperate with the roller device 3 to achieve easy pushing and pulling, improving the battery replacement efficiency. Embodiment

[0026] Please refer to Figures 1-2 FIG. 5. This embodiment is a further improvement based on Embodiment 1. Compared with Embodiment 1, a receiving groove 7 adapted to the PCB mounting board 21 is provided on the battery pack housing 1 corresponding to the PCB mounting board 21, and a telescopic driving mechanism 8 for driving the PCB mounting board 21 and the plug-in terminals to enter and exit the receiving groove 7 is provided in the receiving groove 7. The telescopic driving mechanism 8 includes an electric telescopic rod 81 fixedly installed in the receiving groove 7. The telescopic end of the electric telescopic rod 81 is fixedly connected to the PCB mounting board 21, and a controller 82 for controlling the opening and closing of the electric telescopic rod 81 is provided at the front end of the battery pack housing 1.

[0027] In this embodiment, the accommodation groove 7 provides a storage space for the PCB mounting board 21 and the plug-in terminals. When the battery pack is not installed, the plug-in terminals can be retracted into the accommodation groove 7 to avoid the impact of collisions during transportation and handling, and extend the service life of the terminals. The telescopic driving mechanism 8 drives the plug-in terminals to expand and contract, realizing automatic plugging and unplugging, and reducing the risk of mechanical damage caused by direct manual operation. By controlling the extension and retraction of the electric telescopic rod 81 through the controller 82, it can ensure that the plug-in terminals are docked with the copper busbar plug-in of the battery rack at a constant speed and force, avoiding poor contact or terminal deformation caused by uneven manual operation.

[0028] Among them, limiting blocks 83 are fixedly connected to the surfaces of the PCB mounting board 21, limiting grooves 84 are provided on the inner wall of the accommodation groove 7 corresponding to the limiting blocks 83, and the limiting blocks 83 are slidably connected to the limiting grooves 84. The limiting blocks 83 and the limiting grooves 84 form a sliding pair constraint to ensure that the PCB mounting board 21 only moves linearly during the telescopic process, avoiding deflection or shaking, and ensuring the precise alignment of the plug-in terminals with the copper busbar plug-in of the battery rack.

[0029] The above is only a preferred specific embodiment of the present invention; however, the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention, according to the technical solution of the present invention and its improved concept, makes equivalent substitutions or changes, and should be covered by the protection scope of the present invention.

Claims

1. A quick plug-and-play safety connection device for the main positive and negative electrodes of a battery pack without a wire harness, including a battery pack housing (1), and an electric core assembly (6) is arranged inside the battery pack housing (1). It is characterized in that: A plug-and-play conductive device (2) is arranged at the rear end of the battery pack housing (1). The plug-and-play conductive device (2) includes a PCB mounting board (21). The PCB mounting board (21) is mounted at the rear end of the battery pack housing (1). A positive plug terminal (22) and a negative plug terminal (23) are arranged on the PCB mounting board (21). The positive plug terminal (22) and the negative plug terminal (23) are used to connect with the copper row plug-in of the battery rack. The PCB mounting board (21) is connected to the electric core assembly (6) inside the battery pack housing (1) through a wire; A roller device (3) is arranged on the outer side of the bottom of the battery pack housing (1). The roller device (3) is used for the battery pack to slide smoothly on the battery rack.

2. The quick plugging and unplugging safety connection device for the main positive and negative electrodes of a battery pack without a wire harness according to claim 1, characterized in that: A liquid cooling plate (4) is arranged at the bottom of the battery pack housing (1).

3. A quick plug-and-play safety connection device for the main positive and negative electrodes of a battery pack without a wire harness, characterized in that: A handle (5) is arranged at the front end of the battery pack housing (1).

4. A quick plug - and - unplug safety connection device for the main positive and negative electrodes of a battery pack without a wire harness according to claim 1, characterized in that: The roller device (3) includes a roller frame (31). The roller frame (31) is fixedly installed on the side of the battery pack housing (1). A plurality of rollers (32) are rotatably connected to the roller frame (31).

5. The quick plugging and unplugging safety connection device for the main positive and negative electrodes of a battery pack without a wire harness according to claim 4, characterized in that: A plurality of auxiliary wheels (33) are rotatably installed on the outer side of the roller frame (31).

6. The quick plugging and unplugging safety connection device for the main positive and negative electrodes of a battery pack without a wire harness according to claim 1, characterized in that: A receiving groove (7) adapted to the PCB mounting board (21) is opened on the battery pack housing (1) corresponding to the PCB mounting board (21). A telescopic driving mechanism (8) for driving the PCB mounting board (21) and the plug terminals to enter and exit the receiving groove (7) is arranged in the receiving groove (7).

7. A quick plug-and-play safety connection device for the main positive and negative electrodes of a battery pack without a wire harness, characterized in that: The telescopic driving mechanism (8) includes an electric telescopic rod (81) fixedly installed in the receiving groove (7). The telescopic end of the electric telescopic rod (81) is fixedly connected to the PCB mounting board (21). A controller (82) for controlling the opening and closing of the electric telescopic rod (81) is arranged at the front end of the battery pack housing (1).

8. A quick plug-and-play safety connection device for the main positive and negative electrodes of a battery pack without a wire harness, characterized in that: Limiting blocks (83) are fixedly connected to the surface of the PCB mounting board (21). Limiting grooves (84) corresponding to the limiting blocks (83) are opened on the inner wall of the receiving groove (7). The limiting blocks (83) are slidably connected to the limiting grooves (84).

9. A quick plug-and-play safety connection device for the main positive and negative electrodes of a battery pack without a wire harness, characterized in that: Positioning pins (24) are arranged on the battery pack housing (1) and on the outer sides of the positive plug terminal (22) and the negative plug terminal (23).

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