A portable electric bicycle lithium battery

Abstract

The application discloses a portable electric bicycle lithium battery and belongs to the technical field of lithium batteries. The lithium battery comprises a shell, a buffer rubber block fixedly connected in the shell, a lithium battery placed in the buffer rubber block, a support rod with a rectangular distribution hingedly connected to the shell, the support rod being used for stably supporting the shell in a battery compartment of an electric bicycle, a first elastic member fixedly connected between the support rod with a rectangular distribution and the shell, and a driving assembly arranged on the shell and used for driving all the support rods to rotate. After the shell is placed in the battery compartment, the support rods are deflected to contact the battery compartment, so that the shell is fixed, the gap between the shell and the battery compartment is offset, the probability of the shell and the battery compartment being bumped due to bumping in the subsequent driving process of the electric bicycle is greatly reduced, and the service life and safety degree of the lithium battery are improved.

Description

Technical Field

[0001] This invention relates to the field of lithium battery technology, and more particularly to a portable electric bicycle lithium battery. Background Technology

[0002] Lithium-ion batteries have become the mainstream power source in the electric bicycle industry due to their significant advantages such as high energy density, long cycle life, low self-discharge rate, and lightweight design. To fully enhance ease of use, they are usually designed as portable and detachable structures: the battery module is independent of the vehicle body and integrated into a dedicated battery box, equipped with a handle and standardized quick-release interface, which makes it easy for users to quickly remove it and charge it at the nearest charging point after the battery is depleted. At the same time, the modular structure also facilitates battery maintenance, replacement, and secondary use, further enhancing the user experience and market competitiveness of the product.

[0003] In existing technologies, most electric bicycle battery compartments lack effective fixing and support measures. Portable lithium batteries are usually placed directly inside the electric bicycle battery compartment. To facilitate the entry of lithium batteries into the electric bicycle battery compartment, the opening of the battery compartment needs to be larger than the lithium battery for easy insertion. Furthermore, portable lithium batteries are usually used in the battery swapping field. Portable lithium batteries are often used in different electric bicycles, and the battery compartment sizes of different electric bicycles vary. This results in a certain gap between the lithium battery and the battery compartment. When the electric bicycle is driven on bumpy roads, the battery shakes and shifts inside the compartment due to the lack of lateral support, repeatedly bumping against the inner wall of the battery compartment. Long-term vibration and impact not only cause wear on the battery shell, but also transmit to the internal cells, leading to serious problems such as fatigue fracture of the cell tabs, loosening of internal connections, or even short circuits. This significantly shortens the battery life and increases safety. Summary of the Invention

[0004] To overcome the shortcomings mentioned in the background art, the present invention provides a portable lithium battery for electric bicycles.

[0005] The technical implementation of the present invention is as follows: a portable electric bicycle lithium battery includes a shell, a buffer rubber block fixedly connected inside the shell, a lithium battery placed inside the buffer rubber block, the buffer rubber block being used to reduce the vibration force on the lithium battery, a rectangularly distributed support rod hinged to the shell, the support rod being used to stably support the shell in the battery compartment of the electric bicycle, each of the rectangularly distributed support rods being fixedly connected to the shell with a first elastic element, the first elastic element being used to drive the corresponding support rod to reset, and a drive assembly for driving all the support rods to rotate on the shell.

[0006] Furthermore, the buffer block is provided with several evenly distributed heat dissipation channels for heat dissipation of the lithium battery.

[0007] Furthermore, the drive assembly includes a number of fixed blocks equal to the number of support rods. The fixed blocks are fixedly connected to the housing. Each fixed block is rotatably connected to a spur gear. The spur gear is threadedly connected to a push shaft that is splinedly connected to the corresponding fixed block. The push shaft is used to push the corresponding support rod. The housing is provided with a push assembly for driving all the push shafts.

[0008] Furthermore, the contact position between the push shaft and the corresponding support rod is close to the rotatable connection between the corresponding support rod and the outer casing.

[0009] Furthermore, the pushing component includes a sliding frame that is slidably connected between the outer shell and the buffer block. The sliding frame is provided with racks of the same number as the support rods. The racks mesh with the corresponding spur gears. The sliding frame is fixedly connected to a pusher.

[0010] Furthermore, the outer shell is fixedly connected to a first locking block, the pusher is slidably connected to a second locking block, and a second elastic element is fixedly connected between the second locking block and the pusher. The first locking block is used to squeeze and limit the corresponding second locking block.

[0011] Furthermore, the sliding frame and the rack are slidably connected.

[0012] Furthermore, a third elastic element is fixedly connected between the sliding frame and the rack.

[0013] Furthermore, the pusher is fixedly connected to a pressing plate, which is used to press the connector that is connected to the lithium battery.

[0014] Furthermore, the pressing plate is fixedly connected to a silicone ring, which is used to seal the docking port of the lithium battery, and the silicone ring has a notch for the circuit to pass through.

[0015] The present invention has the following advantages: 1. The present invention fixes the outer shell by placing the outer shell into the battery compartment and then deflecting several support rods to contact the battery compartment. This compensates for the gap between the outer shell and the battery compartment, greatly reducing the probability of collision between the outer shell and the battery compartment caused by bumps during the subsequent driving of the electric vehicle, and improving the service life and safety of the lithium battery.

[0016] 2. By placing the outer casing into the battery compartment, several support rods are independently deflected to contact the inner wall of the battery compartment. The compression of the third elastic element compensates for the difference in the stroke of each support rod, achieving adaptive fitting for battery compartments of different shapes and sizes. Reliable fixation can be achieved without precise centering.

[0017] 3. The push-frame linkage pressing plate locks the outer shell while pressing and fixing the power supply line connector, improving the stability of the connector during bumpy rides. At the same time, the silicone ring and notch work together to seal the connection between the power supply line and the lithium battery, reducing the risk of contact oxidation and short circuit caused by moisture intrusion, and improving the reliability of the electrical connection. Attached Figure Description

[0018] Figure 1 This is a three-dimensional structural diagram of the present invention; Figure 2 This is a three-dimensional cross-sectional view of the outer casing of the present invention; Figure 3 This is a three-dimensional cross-sectional view of the buffer block of the present invention; Figure 4 This is a three-dimensional structural diagram of the sliding frame and rack of the present invention; Figure 5 This is a three-dimensional structural diagram of the spur gear and drive shaft of the present invention; Figure 6 For the present invention Figure 2 Enlarged diagram of point A in the middle.

[0019] The meanings of the reference numerals in the figure are as follows: 1: outer shell, 2: buffer rubber block, 3: lithium battery, 4: support rod, 5: first elastic element, 6: heat dissipation channel, 201: fixing block, 202: spur gear, 203: push shaft, 204: sliding frame, 205: rack, 206: push frame, 301: first locking block, 302: second locking block, 303: second elastic element, 401: third elastic element, 402: pressing plate, 403: silicone ring, 404: notch. Detailed Implementation

[0020] References to embodiments herein mean that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of the invention. The appearance of this phrase in various places in the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0021] The existing battery compartments of electric bicycles generally lack an effective fixing structure. Portable lithium batteries have gaps between the compartment opening and the inner wall because the compartment opening needs to be larger than the battery body. When encountering bumps during riding, the battery shakes and collides inside the compartment. Long-term vibration can easily cause wear on the outer shell and may cause the internal cell tabs to break, the connection to become loose, or even short circuit, significantly shortening the battery life and bringing safety hazards.

[0022] Example 1

[0023] This embodiment provides a portable electric bicycle lithium battery for battery protection.

[0024] like Figures 1-3 As shown, the device includes an outer shell 1 with a rectangular cross-sectional profile. A buffer block 2 is fixedly connected inside the outer shell 1. The buffer block 2 consists of a rubber base and four rubber strips. A lithium battery 3 is placed inside the buffer block 2. The power supply port and charging port of the lithium battery 3 are both located on the upper side. The rubber base of the buffer block 2 is used to reduce the vertical vibration force on the lithium battery 3, and the rubber strips of the buffer block 2 are used to reduce the horizontal vibration force on the lithium battery 3. Four rectangularly distributed support rods 4 are hinged to the outer shell 1. The four support rods 4 are located on the four sides of the outer shell 1, and the support rods 4 are used for… The outer shell 1 is securely supported in the battery compartment of the electric bicycle. The four rectangular support rods 4 are fixedly connected to the outer shell 1 with two symmetrically distributed first elastic elements 5. The first elastic elements 5 are torsion springs, which are initially in an untorsed state. The first elastic elements 5 are used to drive the corresponding support rods 4 to reset. The rubber strip of the buffer block 2 is provided with several evenly distributed heat dissipation channels 6 to reduce the contact area between the buffer block 2 and the lithium battery 3, so as to ensure the heat dissipation of the lithium battery 3. The outer shell 1 is provided with a drive assembly for driving all the support rods 4 to rotate.

[0025] like Figures 2-5 As shown, the drive assembly includes the same number of fixed blocks 201 as the support rods 4. The four fixed blocks 201 are respectively fixedly connected to the four sides of the housing 1. The fixed blocks 201 are rotatably connected to spur gears 202. The spur gears 202 are threadedly connected to push shafts 203 that are splinedly connected to the corresponding fixed blocks 201. The push shafts 203 are used to push the corresponding support rods 4. The rotation of the spur gears 202 causes the push shafts 203 to push the corresponding support rods 4 to deflect. The push shafts 203 adopt a threaded connection and have a self-locking structure to prevent the support rods 4 from pushing the push shafts 203 in the opposite direction. The contact position between the push shafts 203 and the corresponding support rods 4 is close to the rotatable connection between the corresponding support rods 4 and the housing 1. This is to form an enlarged mechanism so that the small movement of the push shafts 203 can drive the far end of the support rods 4 to deflect a long distance. The housing 1 is provided with a drive assembly for driving all the push shafts 203.

[0026] like Figures 1-6As shown, the pushing component includes a sliding frame 204, which is slidably connected between the outer shell 1 and the buffer block 2. Four support rods 4 together limit the sliding frame 204, preventing it from moving upwards further. The illustrated state is the upper limit position of the sliding frame 204. The sliding frame 204 is provided with racks 205 in the same number as the support rods 4. In this embodiment, the connection between the sliding frame 204 and the racks 205 is fixed, but this is limited to this embodiment. The racks 205 mesh with the corresponding spur gears 202. The sliding frame 204 is fixedly connected to a pusher 206. The user can drive the sliding frame 204 up and down through the pusher 206, thereby enabling the sliding frame 204 to drive the corresponding spur gears 202 to rotate through the racks 205. The pusher 206 is provided with a phase... The adjacent support rod 4 deflects through the slot. The outer shell 1 is fixedly connected to four rectangularly distributed first locking blocks 301. The four first locking blocks 301 are in pairs, and the two pairs of first locking blocks 301 are symmetrically distributed on two sides of the outer shell 1. The push frame 206 is slidably connected to four second locking blocks 302. Both the first locking blocks 301 and the second locking blocks 302 have two symmetrically distributed inclined surfaces. The second locking blocks 302 and the push frame 206 are fixedly connected to a second elastic element 303. The second elastic element 303 is a spring. The second elastic element 303 is used to drive the corresponding second locking block 302 to reset. The first locking block 301 is used to squeeze and limit the corresponding second locking block 302. The inclined surface of the first locking block 301 squeezes the inclined surface of the corresponding second locking block 302, thereby causing the second locking block 302 to slide along the push frame 206.

[0027] Working principle: When the user needs to place this device in the battery compartment of an electric bicycle, the user holds the pusher 206 and lifts it upwards. At this moment, the pusher 206 drives the outer shell 1 to move upwards synchronously through the sliding frame 204. Then, the user places the outer shell 1 in the center of the electric bicycle's battery compartment using the pusher 206. The user connects the electric bicycle's power supply line to the power port of the lithium battery 3. Then, the user pushes the pusher 206 downwards. The pusher 206 drives the sliding frame 204 to move downwards along the outer shell 1. The sliding frame 204 drives the four rectangularly distributed racks 205 on it to move downwards synchronously, causing the racks 205 to drive the corresponding spur gears 202 to rotate. The rotation of the spur gears 202 drives the corresponding push shaft 203 to slide along the fixed block 201, causing the push shaft 203 to push the corresponding support rod 4 to deflect outwards along the outer shell 1. At the same time, the first elastic element 5 is activated. The device twists and turns, and simultaneously the push frame 206 drives the four rectangularly distributed second locking blocks 302 on it to move downwards in sync. This continues until the second locking block 302 contacts and compresses the corresponding first locking block 301. The second locking block 302 slides along the push frame 206 under the compression of the corresponding first locking block 301, while the second elastic element 303 is compressed. When the second locking block 302 passes the corresponding first locking block 301, the second elastic element 303 releases its elastic force and pushes the corresponding second locking block 302 back to its original position relative to the push frame 206. The first locking block 301 limits the push frame 206 through the corresponding second locking block 302. At this moment, the four rectangularly distributed support rods 4 deflect to contact the battery compartment of the electric bicycle, thereby fixing the outer shell 1 and locking the device inside the battery compartment of the electric bicycle, reducing the probability of collision between the device and the battery compartment of the electric bicycle.

[0028] When the user needs to remove the device, the user pulls the pusher 206, causing the second locking block 302 on the pusher 206 to move upward. The first locking block 301 presses against the corresponding second locking block 302, and the second elastic element 303 is compressed. When the second locking block 302 passes the corresponding first locking block 301, the second elastic element 303 releases its elasticity and pushes the corresponding second locking block 302 back to its original position relative to the pusher 206. At the same time, the pusher 206 drives the rack 205 to move upward synchronously through the sliding frame 204, causing the rack 205 to drive the corresponding spur gear 202 to return to its original position. When the spur gear 202 rotates, it drives the corresponding push shaft 203 to reset, thereby releasing the push on the support rod 4. At the same time, the first elastic element 5 drives the corresponding support rod 4 to reset and deflect, releasing the support state between the support rod 4 and the battery compartment. When the support rod 4 is fully reset, the sliding frame 204 slides along the outer shell 1 to the limit position. Then, the user disconnects the power supply line from the lithium battery 3 and operates the push frame 206 to drive the lithium battery 3 out of the battery compartment through the sliding frame 204 and the outer shell 1. When it is necessary to place this device in the battery compartment of the electric bicycle again, the above steps are repeated.

[0029] Example 2

[0030] This embodiment provides a portable electric bicycle lithium battery, which is a further improvement on Embodiment 1.

[0031] like Figure 1 , Figure 2 and Figure 5 As shown, the sliding frame 204 and the rack 205 are slidably connected. A third elastic element 401 is fixedly connected between the sliding frame 204 and the rack 205. The third elastic element 401 is a spring and is used to connect the sliding frame 204 and the rack 205. The elastic coefficient of the third elastic element 401 is less than that of the second elastic element 303. It is used to keep the first locking block 301 and the second locking block 302 in a stable position. The push frame 206 is fixedly connected to a pressing plate 402. The pressing plate 402 is used to press the connector that is connected to the lithium battery 3 to ensure the stability of the power supply line and the lithium battery 3. A silicone ring 403 is fixedly connected to the lower side of the pressing plate 402. The silicone ring 403 fits against the upper side of the lithium battery 3 and is used to seal the connector of the lithium battery 3. The silicone ring 403 has a notch 404 for the line to pass through to reduce the probability of external moisture entering the connection between the power supply line and the lithium battery 3.

[0032] Working principle: During the downward movement of the sliding frame 204 driven by the pusher 206, the sliding frame 204 drives the four rectangularly distributed racks 205 to move downward through the third elastic element 401. The racks 205 drive the spur gears 202 to rotate, thereby causing the push shaft 203 to push the corresponding support rod 4 to deflect. However, due to the different battery compartment models of different electric bicycles, and the fact that users may not be able to place this device in the center of the electric bicycle battery compartment, the deflection range required for different support rods 4 to achieve a tight fixation between the device and the battery compartment varies. When a certain support rod 4 first contacts the inner wall of the battery compartment, the support rod 4 does not... If the rack 205 continues to deflect, it will be unable to move downwards to drive the corresponding spur gear 202 to rotate. At this moment, the pusher 206 continues to push the sliding frame 204 downwards, causing the corresponding third elastic element 401 to compress. This continues until all four third elastic elements 401 are compressed and stored, and all four support rods 4 are in contact with the inner wall of the battery compartment. Then, the pusher 206 continues to push the sliding frame 204 downwards until the pusher 206 drives the second locking block 302 on it to pass over the corresponding first locking block 301, so that the first locking block 301 limits the pusher 206 through the corresponding second locking block 302. At this moment, the device is fixed to the battery compartment.

[0033] When the device needs to be removed, the user pulls the pusher 206 upwards. The pusher 206 causes the second locking block 302 to pass over the corresponding first locking block 301. Then, the user continues to pull the pusher 206, causing the pusher 206 to drive the sliding frame 204 upwards. At the same time, several third elastic elements 401 gradually reset. This continues until the pusher 206 drives the sliding frame 204 back to its initial position. At this point, several support rods 4 have completed their reset and deflection, releasing the device from the battery compartment. Then, the power supply line is disconnected from the lithium battery 3, and the device is removed. When the device needs to be placed back into the battery compartment, the above steps are repeated.

[0034] As the pusher 206 moves downward, it drives the pressing plate 402 on it to move synchronously. When the pusher 206 slides to its limit position, the pressing plate 402 presses the connector connecting the power supply line and the lithium battery 3 to form a fixed connection, so as to ensure the stable connection of the power supply line. At the same time, the pressing plate 402 drives the silicone ring 403 on it to move synchronously, so that the silicone ring 403 fits against the upper side of the lithium battery 3, and the power supply line is inserted into the notch 404 on the silicone ring 403. This achieves the sealing of the connection between the power supply line and the lithium battery 3 by the silicone ring 403, reducing the probability of external moisture entering the connection between the two.

[0035] The above description is merely an embodiment of the present invention and is not intended to limit the present invention. Any equivalent substitutions made within the principles of the present invention should be included within the protection scope of the present invention. The contents not described in detail in the present invention belong to the prior art known to those skilled in the art.

Claims

1. A portable electric bicycle lithium battery, comprising a casing (1), wherein a buffer block (2) is fixedly connected inside the casing (1), and a lithium battery (3) is placed inside the buffer block (2), wherein the buffer block (2) is used to reduce the vibration force on the lithium battery (3), characterized in that, The outer shell (1) is hinged with rectangularly distributed support rods (4). The support rods (4) are used to firmly support the outer shell (1) in the battery compartment of the electric bicycle. Each of the rectangularly distributed support rods (4) is fixedly connected to the outer shell (1) with a first elastic element (5). The first elastic element (5) is used to drive the corresponding support rod (4) to reset. The outer shell (1) is provided with a drive assembly for driving all the support rods (4) to rotate. The drive assembly includes a number of fixed blocks (201) equal to the number of support rods (4). The fixed blocks (201) are fixedly connected to the housing (1). The fixed blocks (201) are rotatably connected to spur gears (202). The spur gears (202) are threadedly connected to push shafts (203) that are splinedly connected to the corresponding fixed blocks (201). The push shafts (203) are used to push the corresponding support rods (4). The housing (1) is provided with a drive assembly for driving all the push shafts (203) to move.

2. A portable electric bicycle lithium battery according to claim 1, characterized in that, The buffer block (2) is provided with several evenly distributed heat dissipation channels (6) for the heat dissipation of the lithium battery (3).

3. A portable electric bicycle lithium battery according to claim 1, characterized in that, The contact position between the push shaft (203) and the corresponding support rod (4) is close to the rotational connection between the corresponding support rod (4) and the outer shell (1).

4. A portable electric bicycle lithium battery according to claim 3, characterized in that, The pushing component includes a sliding frame (204), which is slidably connected between the outer shell (1) and the buffer block (2). The sliding frame (204) is provided with racks (205) in the same number as the support rod (4). The racks (205) mesh with the corresponding spur gears (202). The sliding frame (204) is fixedly connected to a pusher (206).

5. A portable electric bicycle lithium battery according to claim 4, characterized in that, The outer shell (1) is fixedly connected to a first locking block (301), and the push frame (206) is slidably connected to a second locking block (302). A second elastic element (303) is fixedly connected between the second locking block (302) and the push frame (206). The first locking block (301) is used to squeeze and limit the corresponding second locking block (302).

6. A portable electric bicycle lithium battery according to claim 5, characterized in that, The sliding frame (204) and the rack (205) are slidably connected.

7. A portable electric bicycle lithium battery according to claim 6, characterized in that, A third elastic element (401) is fixedly connected between the sliding frame (204) and the rack (205).

8. A portable electric bicycle lithium battery according to claim 7, characterized in that, The pusher (206) is fixedly connected to a pressing plate (402), which is used to press the connector that is connected to the lithium battery (3).

9. A portable electric bicycle lithium battery according to claim 8, characterized in that, The pressing plate (402) is fixedly connected to a silicone ring (403), which is used to seal the docking port of the lithium battery (3). The silicone ring (403) has a notch (404) for the circuit to pass through.

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