Electric motorcycle lithium battery with low-voltage switch power connection port

Abstract

The utility model discloses an electric motorcycle lithium battery with a low-voltage switch power connection port. Comprising a lithium battery shell installed on a frame of the electric motorcycle, a lithium battery cell installed from an opening of the lithium battery shell, a power connection socket arranged on the outer side of the lithium battery shell and connected with the lithium battery cell, and a shell cover plate matched with the opening of the lithium battery shell and installed in a sealed mode. A battery cell control PCB is arranged on the lithium battery cell, a power connection piece connected with the power connection socket is arranged on the battery cell control PCB in a protruding mode, and a low-voltage switch connected with the power connection piece is arranged on the battery cell control PCB. The low-voltage switch arranged on the lithium battery of the electric motorcycle can control the on-off of a circuit of a battery system through the low-voltage switch at the moment when the plug is separated from the socket, so that the generated current can be prevented from being too large, electric sparks cannot be generated, the lithium battery is protected, and the service life is prolonged; and an operator is not frightened by electric sparks when pulling out the plug and does not worry about personal installation.

Description

Technical Field

[0001] This utility model relates to the technical field of lithium batteries for electric motorcycles, and more particularly to a lithium battery for electric motorcycles with a low-voltage switch connection port. Background Technology

[0002] At present, electric motorcycles driven by lithium batteries have gradually occupied a certain market share and are increasingly used and popularized by users. When lithium batteries are used in electric motorcycles, they are connected to the electric motorcycle by high-voltage wires, and then the high-voltage wires are connected to the motor to drive the wheels to rotate. Traditional lithium battery wiring is that the high-voltage wires are inserted into the socket on the lithium battery through the connector to form a stable connection. However, there are still some problems when the existing lithium batteries are installed in the electric motorcycle frame and connected to the high-voltage wires, especially the structure of the lithium batteries needs to be improved. The specific problems are as follows: (1) When the lithium battery is plugged into the high-voltage wire, it is a direct high-voltage connection without any voltage conversion. When the plug of the high-voltage wire is directly pulled out of the lithium battery, a large electric spark will be generated at the connection point, which will have a great impact on the service life of the lithium battery. Moreover, the electric spark generated by pulling out the plug will cause a certain amount of fright to the operator, making them worry about the safety of use. (2) The lithium battery of an electric motorcycle is basically composed of a lithium battery cell and a battery casing. The lithium battery cell is directly installed inside the battery casing to form a fixed structure. The lithium battery cell is generally a square structure, and the battery casing is also generally a square structure. However, sometimes the battery casing needs to be modified in shape according to the design of the external structure. For example, the front of the casing may be tilted forward or the overall shape may be similar to a rhombus. In this way, when the lithium battery cell is installed into these battery casings, some surfaces may not be tightly attached or pressed against the inner wall of the battery casing. Even if the square lithium battery cell is installed into the square battery casing, the two are installed by pressing and attaching without any other screws or other connections. During the ride, the lithium battery cell will shake and vibrate due to the bumpy ride. This will cause the lithium battery cell to impact the battery casing, resulting in the lithium battery cell not being installed firmly enough and the battery casing being prone to deformation and breakage. In addition, when a non-square battery casing is used, the lithium battery cell cannot be effectively clamped, which makes it easier for the lithium battery cell to shift during installation, and both the lithium battery cell and the battery casing are at risk of deformation and damage. (3) A lithium battery cell is composed of multiple cell blocks that are pressed together and connected. The cell blocks are securely connected and installed, but the outermost left and right cell blocks are directly exposed outside the lithium battery cell without any fixed brackets or fixing plates installed on the outside. This can easily cause the outermost cell blocks of the lithium battery cell to fall off, and the entire lithium battery cell will have displacement deviation when it is squeezed or impacted. The lithium battery cell has poor protection and the protection effect is not ideal.(4) When installing and plugging the socket and plug of the lithium battery, the traditional socket and plug structure is used. That is, when plugging, the plug is pressed into the socket and when unplugging, the plug is pulled out directly from the socket. This kind of plugging method will cause the plug to be accidentally hit or not plugged in properly and easily fall out of the socket. This greatly increases the risk of power failure when the lithium battery provides power to the motor. In particular, the safety hazards caused by accidental power failure during driving are extremely high.

[0003] Therefore, improvements are needed to the existing lithium battery structure of electric motorcycles to solve the aforementioned problems. Summary of the Invention

[0004] The purpose of this invention is to overcome the shortcomings of the prior art and provide an electric motorcycle lithium battery with a low-voltage switch connection. This electric motorcycle lithium battery with a low-voltage switch connection has a low-voltage switch at the wiring position of the socket. This low-voltage switch controls the circuit switching of the battery system the instant the plug is disconnected from the socket, disconnecting the high-voltage power at that moment. This prevents excessive current and electric sparks, protecting the lithium battery and extending its service life. It also prevents operators from being startled by electric sparks when unplugging the plug, thus improving the safety of lithium battery use. Furthermore, a cell fixing clamp is added inside the lithium battery casing to firmly clamp the lithium battery cells, and screw mounting pieces are added to fix the installation position of the lithium battery cells, increasing the firmness and stability of the installation. A cell protective pressure plate is also added to the outermost side of the lithium battery cells to protect them, improving the tight connection of each cell and ensuring the consistency of the lithium battery cell specifications.

[0005] The technical solution adopted by this utility model to solve its technical problem is: an electric motorcycle lithium battery with a low-voltage switch connection port, including a lithium battery housing that is installed on the electric motorcycle frame and is an integral structure, a lithium battery cell installed into the lithium battery housing through an opening in the lithium battery housing, a power socket connected to the lithium battery cell on the outside of the lithium battery housing, and a housing cover plate that is fitted and sealed with the opening of the lithium battery housing; the lithium battery cell is provided with a cell control PCB board, a power contact piece protruding from the cell control PCB board and connected to the power socket, and a low-voltage switch connected to the power contact piece is provided on the cell control PCB board.

[0006] Furthermore, the lithium battery casing has a left cell fixing clamp and a right cell fixing clamp erected on the two inner sides to clamp and fix the two sides of the lithium battery cell; and the lithium battery cell has a cell protection pressure plate on both sides to press and fix each cell block.

[0007] Furthermore, the power socket is movably connected to a movable connector with a high-voltage wire. The movable connector and the power socket are connected by plugging to form a power connection. The movable connector is provided with a rotating buckle. The power socket is provided with a rotating slot that forms a movable locking installation with the rotating buckle. The outside of the movable connector is provided with a release indicator mark indicating that the movable connector and the power socket are in a loose state.

[0008] Furthermore, the left cell fixing clamp is provided with a notch for the cell fixing clamp, which is provided with a corresponding contact piece and a contact socket, and allows the contact piece to be exposed.

[0009] Furthermore, the current rating of both the power socket and the movable plug is 100A to 150A.

[0010] Furthermore, the lithium battery cell has a protruding left connecting mounting plate with a left mounting hole on the left side of its front end, and a protruding right connecting mounting plate with a right mounting hole on the right side of its front end; the left cell fixing clamp has a left cell mounting hole that matches the left mounting hole, and the right cell fixing clamp has a right cell mounting hole that matches the right mounting hole.

[0011] Furthermore, the mounting surfaces of the lithium battery casing and the casing cover are coated with waterproof adhesive.

[0012] In summary, the electric motorcycle lithium battery with a low-voltage switch connection of this utility model has a low-voltage switch at the wiring position of the socket. This low-voltage switch controls the circuit switching of the battery system the instant the plug is disconnected from the socket, disconnecting the high-voltage power. This prevents excessive current and electrical sparks, protecting the lithium battery and extending its lifespan. Furthermore, it avoids startling operators from electrical sparks when unplugging the battery, thus improving the safety of lithium battery use. In addition, a cell fixing clamp is added inside the lithium battery casing to secure the lithium battery cells, and screw mounting pieces are added to fix the installation position of the lithium battery cells, increasing the firmness and stability of the installation. A cell protective pressure plate is also added to the outermost part of the lithium battery cells to protect them, improving the tight connection of each cell and ensuring the consistency of the lithium battery cell specifications. Attached Figure Description

[0013] Figure 1 This is an exploded view of the structure of a lithium battery for an electric motorcycle with a low-voltage switch interface.

[0014] Figure 2 This is an exploded view of the structure of an electric motorcycle lithium battery with a low-voltage switch interface from another direction.

[0015] The labels in the attached diagram are as follows: 1. Lithium battery casing; 2. Lithium battery cell; 3. Power socket; 4. Casing cover; 5. Cell control PCB board; 6. Connecting plate; 7. Left cell fixing clamp; 8. Right cell fixing clamp; 9. Cell protection pressure plate; 10. Movable connector; 11. Release indicator; 12. Notch in cell fixing clamp; 13. Left mounting hole; 14. Left connecting mounting plate; 15. Right mounting hole; 16. Right connecting mounting plate; 17. Left cell mounting hole; 18. Right cell mounting hole; 19. High-voltage wire. Detailed Implementation

[0016] Example 1

[0017] This embodiment 1 describes an electric motorcycle lithium battery with a low-voltage switch interface, such as... Figure 1 and Figure 2 As shown, the device includes a lithium battery housing 1, which is an integral structure mounted on the frame of an electric motorcycle; a lithium battery cell 2, which is installed inside the lithium battery housing through an opening in the lithium battery housing; a power socket 3, which is connected to the lithium battery cell, located on the outside of the lithium battery housing; and a housing cover 4, which is fitted and sealed to the opening of the lithium battery housing. The lithium battery cell is provided with a cell control PCB board 5, and a power contact piece 6 protrudes from the cell control PCB board and is connected to the power socket. A low-voltage switch (not shown in the figure) is provided on the cell control PCB board and is connected to the power contact piece.

[0018] The lithium battery casing features a unibody structure, ensuring consistent strength and sealing. It is formed by a single stamping process, with seamless welding at the stamping seams, resulting in excellent sealing. Unlike traditional rectangular structures, the casing incorporates angled surfaces, causing a slight forward tilt when mounted on the electric motorcycle frame. This ensures the battery's center of gravity aligns with the existing engine mounting position, allowing for minimal or no modification to the basic frame structure to accommodate the battery installation. During installation, the battery cell is inserted into the casing through the opening. The power connector on the outer side of the casing is then connected to the battery cell's contact point. Finally, the casing cover is sealed to the opening, secured with screws and sealing rings for a tight seal. The cell control PCB board is the control system for the entire lithium battery cell, including the controller for charging, discharging, and related operating states. The connectors and sockets can be connected via either a press-fit method where the socket is pressed against the connector, or a wired connection where the socket is wrapped with wire and connected to the connector. A low-voltage switch on the cell control PCB board disconnects the power supply when the socket becomes detached from the corresponding high-voltage wire. This instantaneous low-voltage switch controls the circuit's continuity, preventing excessive current and electrical sparks. The high voltage within the lithium battery is either disconnected or replaced with a lower voltage, protecting the operator.

[0019] In this embodiment 1, a left cell fixing clamp 7 and a right cell fixing clamp 8 are respectively erected on the two inner sides of the lithium battery casing to clamp and fix the two sides of the lithium battery cell; cell protection pressure plates 9 are provided on both sides of the lithium battery cell to press and fix each cell block. The top and bottom surfaces of the lithium battery casing are flat, while the two sides of the lithium battery casing are inclined to a certain extent. Since the lithium battery cell is square, the vertically installed left and right cell fixing clamps can clamp and fix the two sides of the lithium battery cell. Combined with the positioning and limiting of the four sides of the lithium battery cell by the top and bottom surfaces of the lithium battery casing, the installation position of the lithium battery cell can be limited and fixed, ensuring that the lithium battery cell can be fixed and limited when the electric motorcycle is traveling on bumpy roads, and the lithium battery cell will not be accidentally displaced. The cell protection plate has two functions: firstly, to fix the outermost cell block of the lithium battery cell and prevent it from falling out or shifting; secondly, to ensure that all the cell blocks remain upright and do not shift or tilt. After the entire battery cell is fixed with the left and right cell fixing plates, it ensures the consistency of the entire lithium battery cell installation and the overall structure of the lithium battery cell.

[0020] In this embodiment 1, the power socket is movably connected to a movable connector 10 with a high-voltage wire 19. The movable connector and the power socket are connected by plugging to form a power connection. The movable connector is provided with a rotating buckle (not shown in the figure), and the power socket is provided with a rotating groove (not shown in the figure) that is movably locked in place with the rotating buckle. The outside of the movable connector is provided with a release indicator 11 indicating that the movable connector and the power socket are in a loosened state. The movable connector and power socket feature a flexible, plug-in installation structure. The movable connector can be pulled out of or inserted into the power socket. During installation, after inserting the movable connector into the power socket, slightly rotate it downwards. The rotating clip on the movable connector will then engage with the rotating slot of the power socket, securing it firmly. At this point, the movable connector cannot be directly pulled out of the power socket, as the locking mechanism between the rotating clip and the rotating slot provides a limit, ensuring a secondary locking and securing effect after insertion. This double-layered locking system reduces the risk of accidental dislodgement. To remove the movable connector from the power socket, follow the release indicator and rotate it slightly in the direction indicated by the release indicator. This will disengage the rotating clip from the rotating slot, allowing the movable connector to be easily removed.

[0021] In this embodiment 1, the left cell fixing clamp has a notch 12 with corresponding contact pieces and contact sockets, allowing the contact pieces to protrude. The contact socket is installed protrudingly on the side of the lithium battery casing, with the contact end of the contact socket protruding through the left cell fixing clamp. Therefore, the notch on the left cell fixing clamp allows the contact end of the contact socket to pass through this notch. After passing through this notch, the contact socket can form a pressure-plate-like surface contact with the contact piece, or the contact socket and the contact piece can be connected to each other via wires for power supply.

[0022] In this embodiment 1, the current rating of both the power socket and the movable plug is 100A to 150A. Equipping the lithium battery casing with a power socket and movable plug with a sufficiently high current load capacity ensures safe use. Since the power socket and movable plug are frequently plugged and unplugged connection elements, and their plugging and unplugging capacity is often greater than 5000 times, setting the current rating to 100A to 150A avoids the problem of low current load capacity found in conventional connectors, ensuring effective overcurrent control and safe use.

[0023] In this embodiment 1, the lithium battery cell has a protruding left connecting mounting plate 14 with a left mounting hole 13 on the left side of its front end, and a protruding right connecting mounting plate 16 with a right mounting hole 15 on the right side of its front end. The left battery cell fixing clamp has a left battery cell mounting hole 17 that matches the left mounting hole, and the right battery cell fixing clamp has a right battery cell mounting hole 18 that matches the right mounting hole. When the lithium battery cell is installed into the lithium battery casing, the corresponding mounting holes overlap and are fixed with screws, etc. In this way, after the lithium battery cell is installed into the lithium battery casing, the front end of the lithium battery cell is firmly fixed to the lithium battery casing, while the rear end and the five sides of the top, bottom, left, and right ends of the lithium battery cell are pressed and installed tightly, thus forming the effect of fixing the entire lithium battery cell and fixing the lithium battery cell with corresponding mounting plates.

[0024] In this embodiment 1, the mounting surfaces of the lithium battery casing and the casing cover are filled with waterproof adhesive (not shown in the figure). After the lithium battery casing and the casing cover are installed, the waterproof adhesive layer formed by filling the mounting surfaces provides a secure and waterproof seal, improving the sealing and waterproof performance.

[0025] In this embodiment 1, the electric motorcycle lithium battery with a low-voltage switch connection port has a low-voltage switch at the wiring position of the socket. This low-voltage switch controls the circuit switching of the battery system the instant the plug is disconnected from the socket, disconnecting the high-voltage power. This prevents excessive current and electrical sparks, protecting the lithium battery and extending its lifespan. It also prevents operators from being startled by sparks when unplugging the battery, thus improving the safety of lithium battery use. Furthermore, a cell fixing clamp is added inside the lithium battery casing to secure the lithium battery cells, and screw mounting pieces are added to fix the installation position of the lithium battery cells, increasing the firmness and stability of the installation. A cell protection plate is also added to the outermost side of the lithium battery cells to protect them, improving the tight connection of each cell and ensuring the consistency of the lithium battery cell specifications.

[0026] The above description is merely a preferred embodiment of the present utility model and does not constitute any limitation on the structure of the present utility model. Any simple modifications, equivalent changes, and alterations made to the above embodiments based on the technical essence of the present utility model shall still fall within the scope of the technical solution of the present utility model.

Claims

1. A lithium battery for an electric motorcycle with a low-voltage switch connector, characterized in that, The battery includes a lithium battery housing (1) that is mounted on the frame of an electric motorcycle and is an integral structure; a lithium battery cell (2) that is installed inside the lithium battery housing through an opening in the lithium battery housing; a power socket (3) that is connected to the lithium battery cell on the outside of the lithium battery housing; and a housing cover (4) that is fitted and sealed to the opening of the lithium battery housing. The lithium battery cell is provided with a cell control PCB board (5), and a power contact piece (6) that is connected to the power socket is protruding from the cell control PCB board. A low-voltage switch that is connected to the power contact piece is provided on the cell control PCB board.

2. The lithium battery for an electric motorcycle with a low-voltage switch interface according to claim 1, characterized in that, The lithium battery casing has a left cell fixing clamp (7) and a right cell fixing clamp (8) erected on the two inner sides to clamp and fix the two sides of the lithium battery cell; the lithium battery cell has a cell protection pressure plate (9) on both sides to press and fix each cell block.

3. The lithium battery for an electric motorcycle with a low-voltage switch interface according to claim 2, characterized in that, The power socket is movably connected to a movable connector (10) with a high-voltage wire (19). The movable connector and the power socket are connected by plugging to form a power connection. The movable connector is provided with a rotating buckle. The power socket is provided with a rotating slot that forms a movable locking installation with the rotating buckle. The outside of the movable connector is provided with a release indicator mark (11) indicating that the movable connector and the power socket are detached.

4. The lithium battery for an electric motorcycle with a low-voltage switch interface according to claim 3, characterized in that, The left cell fixing clamp is provided with a notch (12) for the cell fixing clamp, which is provided with a corresponding contact piece and a contact socket and allows the contact piece to be exposed.

5. A lithium battery for an electric motorcycle with a low-voltage switch interface according to claim 4, characterized in that, The current rating of both the power socket and the movable plug is 100A to 150A.

6. A lithium battery for an electric motorcycle with a low-voltage switch interface according to claim 5, characterized in that, The lithium battery cell has a left connecting mounting plate (14) with a protruding left mounting hole (13) on the left side of the front end, and a right connecting mounting plate (16) with a protruding right mounting hole (15) on the right side of the front end; the left battery cell fixing clamp has a left battery cell mounting hole (17) that matches the left mounting hole, and the right battery cell fixing clamp has a right battery cell mounting hole (18) that matches the right mounting hole.

7. A lithium battery for an electric motorcycle with a low-voltage switch interface according to claim 6, characterized in that, The mounting surfaces of the lithium battery casing and the casing cover are coated with waterproof adhesive.

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