Electric bicycle battery pack with bidirectional voltage stabilizing circuit

Abstract

The utility model provides an electric bicycle battery pack with a bidirectional voltage stabilizing circuit, which belongs to the technical field of battery packs and comprises a shell provided with a single battery, a locking port, a wireless module, a handle, a discharging interface, a charging interface and the bidirectional voltage stabilizing circuit. The shell body and the handle form the shell body; the single battery, the wireless module, the charging interface and the bidirectional voltage stabilizing circuit are installed in the shell, an electrode of the single battery is connected with a low-voltage side of the bidirectional voltage stabilizing circuit, a high-voltage side of the bidirectional voltage stabilizing circuit is connected with the discharging interface and the charging interface, an auxiliary interface of the bidirectional voltage stabilizing circuit is connected with the wireless module, and the wireless module is connected with the charging interface. The wireless module is used for supplying power to the wireless module and carrying out data interaction, an antenna interface of the wireless module is connected with an antenna interface of the handle, and the disadvantage that a traditional battery pack is prone to loosening in the using process is overcome.

Description

Technical Field

[0001] The utility model belongs to the technical field of battery packs, and specifically relates to an electric bicycle replacement battery pack with a bidirectional voltage stabilizing circuit. Background Art

[0002] With the increasing awareness of environmental protection and the development of technology, electric bicycles, as a clean and convenient means of transportation, are favored by more and more people. However, the performance and endurance of electric bicycles largely depend on the design and performance of their battery packs. Traditional electric bicycle battery packs have a series of problems, which not only affect the overall performance of electric bicycles but also pose potential threats to the safety of users. The battery pack is the energy storage system of an electric bicycle, which is composed of multiple single cells connected in series or parallel and is managed and monitored by a battery management system (BMS) to ensure the safety of the battery and extend its service life. The battery pack not only provides power for the electric bicycle but also determines the endurance mileage, power output characteristics, and charging characteristics of the electric bicycle.

[0003] The following is an overview of some key problems: The output voltage of traditional electric bicycle battery packs fluctuates with the change of the remaining battery power. This voltage fluctuation is a burden on the motor of the electric bicycle because it will cause the performance of the motor to be unstable and even accelerate the aging of the motor. In addition, for the charger, the voltage fluctuation will also reduce the charging efficiency and may even cause the charger to be overloaded or damaged. To meet the requirements of the electric bicycle motor and charger, the voltage level of the traditional battery pack must be strictly matched with them. This usually means that the required voltage level needs to be achieved by changing the number of single cells. This method not only increases the complexity of the battery pack but also limits the flexibility of the battery pack design. In addition, poor consistency of single cells will also lead to a decline in the overall performance of the battery pack. Due to the lack of effective protection measures, traditional battery packs are prone to problems such as battery short circuit and reverse battery connection. These problems will not only damage the battery itself but also pose safety hazards to users. In addition, when multiple battery packs are used in parallel, there may also be a problem of battery circulating current, that is, uneven current flow occurs between the battery packs, which will further exacerbate the consistency problem of the batteries and reduce the overall performance of the battery pack. In addition, the locking port design of traditional battery packs is simple and usually uses a buckle or screw fixation method. This method is prone to loosening during use, especially on bumpy roads. The lack of an effective automatic locking mechanism makes the installation and disassembly of the battery pack not convenient and fast enough, affecting the user experience. Summary of the Utility Model

[0004] In view of this, the present utility model provides an electric bicycle replacement battery pack with a bidirectional voltage stabilizing circuit, which solves the drawback that traditional battery packs are prone to looseness during use and improves the safety of the locking port.

[0005] The present utility model is implemented as follows:

[0006] The present utility model provides an electric bicycle replacement battery pack with a bidirectional voltage stabilizing circuit, which includes a housing. The housing is provided with single cells, a locking port, a wireless module, a handle, a discharge interface, a charging interface, and a bidirectional voltage stabilizing circuit. The housing and the handle form the housing.

[0007] The single cells, the wireless module, the charging interface, and the bidirectional voltage stabilizing circuit are installed in the housing. The electrodes of the single cells are connected to the low-voltage side of the bidirectional voltage stabilizing circuit. The high-voltage side of the bidirectional voltage stabilizing circuit is connected to the discharge interface and the charging interface. The auxiliary interface of the bidirectional voltage stabilizing circuit is connected to the wireless module for supplying power to the wireless module and performing data interaction. The antenna interface of the wireless module is connected to the antenna interface of the handle. The charging interface is arranged on the housing, and the locking port and the discharge interface are on the handle.

[0008] The wireless module consists of an A7680C and a ZSN603, and exchanges data with the Internet of Things platform, the charger, and the vehicle controller through the integrated antenna handle.

[0009] The single cells of the battery pack can use single cells with a lithium iron phosphate material system and a capacity of 230 Ah, and the equivalent power battery specification is 48V15Ah. Or it can also use single cells with a lithium iron phosphate material system and a capacity of 304 Ah, and the equivalent power battery specification is 48V20Ah. Both are suitable for use as electric bicycle power batteries.

[0010] Based on the above technical solution, an electric bicycle replacement battery pack with a bidirectional voltage stabilizing circuit of the present utility model can also be improved as follows:

[0011] Among them, the handle is provided with a locking tongue, a locking port, and a handgrip. The locking port is specifically a groove provided at the top of the handle. The locking port is connected to the locking tongue by insertion. The handgrip is arranged below the locking port for the user to hold.

[0012] Further, the locking port is provided with a groove for fixing the battery pack.

[0013] The beneficial effect of adopting the above improvement scheme is that the groove design of the locking port matching the shape of the battery pack facilitates the quick positioning and installation of the battery pack, improving the convenience for users.

[0014] Furthermore, a spring-loading mechanism and a triggering device are provided at the locking port. The spring-loading mechanism includes at least one spring, a spring seat, and a spring hook. The spring is located on one or both sides of the locking port. The spring seat is fixed on the inner wall of the locking port. The spring hook is connected to one end of the spring and is used to guide the moving direction of the spring.

[0015] The beneficial effects of adopting the above improvement scheme are as follows: The locking port including the spring-loading mechanism and the anti-slip structure improves the safety and stability of the battery pack on the electric bicycle. The spring-loading mechanism can automatically close when the battery pack is inserted, ensuring a tight and safe connection between the battery pack and the electric bicycle.

[0016] Furthermore, the triggering device includes a trigger rod, a trigger button, and a limit block. One end of the trigger rod is connected to the spring-loading mechanism, and the other end is connected to the triggering device. The limit block is installed on the trigger rod and is used to limit the maximum stroke of the trigger rod.

[0017] The beneficial effects of adopting the above improvement scheme are as follows: The triggering device can activate the spring-loading mechanism in response to the insertion of the battery pack, simplifying the installation process of the battery pack and enhancing the user experience. The triggering device includes a trigger rod, a trigger button, and a limit block, ensuring that the spring-loading mechanism can be accurately activated when the battery pack is inserted, improving the reliability and safety of the locking port.

[0018] Furthermore, the trigger rod is connected to the spring-loading mechanism through the spring hook, and the other end of the spring hook is connected to the spring.

[0019] Furthermore, the handle is specifically an integrated antenna handle.

[0020] Furthermore, the wireless module is composed of an A7680C chip and a ZSN603 chip.

[0021] Furthermore, a guiding groove is provided on the inner wall of the locking port, and the guiding groove is used to guide the moving direction of the spring.

[0022] Furthermore, the locking port further includes an unlocking device. The unlocking device includes an unlocking rod, an unlocking button, and a return spring. One end of the unlocking rod is connected to the spring-loading mechanism, and the other end is connected to the unlocking button. The return spring is installed on the unlocking rod.

[0023] The beneficial effects of adopting the above improvement scheme are as follows: The unlocking button includes an unlocking rod, an unlocking button, and a return spring, enabling the user to easily unlock the spring-loading mechanism and facilitating the removal of the battery pack. Through the connection of the spring hook between the unlocking rod and the spring-loading mechanism, the smooth progress of the unlocking process is ensured, improving the convenience of removing the battery pack.

[0024] Compared with the prior art, the beneficial effects of an electric bicycle battery pack with a bidirectional voltage stabilizing circuit provided by the present utility model are as follows:

[0025] Improve the safety of the locking port: By designing a spring-loaded locking port, when the battery pack is inserted, the locking port can automatically close to form a tighter connection, thereby improving the safety between the battery pack and the electric bicycle;

[0026] Enhance the stability of the locking port: Add anti-slip patterns or materials inside the locking port to enhance the friction between the battery pack and the interface, preventing the battery pack from loosening due to bumps or vibrations during the operation of the electric bicycle;

[0027] Stable voltage output: Through the built-in bidirectional voltage stabilizing circuit of the present utility model, the output voltage of the battery pack can be stabilized at a preset value, regardless of the charge state of the battery module. This means that no matter how the remaining battery power changes, the output voltage will remain consistent, greatly improving the service life and efficiency of the motor and charger;

[0028] Flexible voltage regulation: Compared with traditional battery packs, the output voltage of the battery pack provided by the present utility model can be adjusted and is no longer limited by the number of series-connected single cells. In this way, not only can a high-voltage system be achieved with fewer single cells, thereby reducing costs, but also the problem of performance degradation of the battery pack caused by poor consistency of single cells can be avoided;

[0029] Enhanced safety: Since a power circuit is built in and the single cells are not directly connected to the motor and charger, the present utility model effectively avoids adverse situations such as battery short circuits, reverse battery connections, and charger voltage fluctuations to the single cells, ensuring the safe operation of the single cells;

[0030] Avoid battery circulation problems: Since the single cells do not directly output externally, the present utility model avoids battery circulation problems that may occur when multiple battery packs are connected in parallel, further improving the overall performance and reliability of the battery pack;

[0031] Improve maintenance convenience: The battery pack of the present utility model is designed to be more compact and easy to maintain, reducing the maintenance cost and difficulty, and providing a more convenient service experience for users;

[0032] Optimized system design: By using fewer single cells to achieve a high-voltage system, the present utility model not only reduces costs but also reduces the weight of the battery pack, improving the overall performance and maneuverability of the electric bicycle;

[0033] Enhanced Compatibility: Since the output voltage of the battery pack can be adjusted, the present utility model improves the compatibility of the battery pack with other electric bicycle accessories, enabling the battery pack to adapt to a wider range of usage scenarios;

[0034] Extended Battery Life: By stabilizing the voltage output and avoiding battery circulation problems, the present utility model significantly extends the service life of the battery and reduces the frequency of battery replacement. Brief Description of the Drawings

[0035] To more clearly illustrate the technical solutions of the embodiments of the present utility model, the following will briefly introduce the drawings required for use in the description of the embodiments of the present utility model. Obviously, the following-described drawings are only some embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0036] Figure 1 It is an example diagram of an electric bicycle battery pack with a bidirectional voltage stabilizing circuit;

[0037] Figure 2 It is an example diagram of the handle of an electric bicycle battery pack with a bidirectional voltage stabilizing circuit;

[0038] Figure 3 For Figure 2 The enlarged view of part A in

[0039] In the drawings, the list of components represented by each reference numeral is as follows:

[0040] 10. Housing; 11. Single cell; 12. Locking port; 121. Spring loading mechanism; 122. Trigger device; 123. Guide groove; 13. Wireless module; 14. Handle; 141. Lock tongue; 15. Discharge interface; 16. Charging interface. Detailed Embodiments

[0041] To make the objectives, technical solutions, and advantages of the embodiments of the present utility model clearer, the following will clearly and completely describe the technical solutions in the embodiments of the present utility model in conjunction with the drawings in the embodiments of the present utility model.

[0042] As Figures 1 - 3 shown, it is the first embodiment of an electric bicycle battery pack with a bidirectional voltage stabilizing circuit provided by the present utility model. In this embodiment, it includes a housing 10, and the housing 10 is provided with a single cell 11, a locking port 12, a wireless module 13, a handle 14, a discharge interface 15, a charging interface 16, and a bidirectional voltage stabilizing circuit. The housing 10 and the handle 14 form the housing 10;

[0043] The single cell 11, wireless module 13, charging interface 16, and bidirectional voltage stabilizing circuit are installed inside the housing 10. The electrodes of the single cell 11 are connected to the low-voltage side of the bidirectional voltage stabilizing circuit. The high-voltage side of the bidirectional voltage stabilizing circuit is connected to the discharge interface 15 and the charging interface 16. The auxiliary interface of the bidirectional voltage stabilizing circuit is connected to the wireless module 13, which is used to supply power to the wireless module 13 and conduct data interaction. The antenna interface of the wireless module 13 is connected to the antenna interface of the handle 14. The charging interface 16 is provided on the housing 10, and the locking port 12 and the discharge interface 15 are on the handle 14.

[0044] During the energy exchange process, the bidirectional voltage stabilizing circuit collects the temperature, voltage, and current data of various parts of the battery pack and communicates with the vehicle controller or charger to adjust the voltage and current of the bidirectional voltage stabilizing circuit. The specific strategy is as follows:

[0045] (1) When the temperature of the single cell or the bidirectional voltage stabilizing circuit is higher than the first temperature threshold, the bidirectional voltage stabilizing circuit starts to reduce the current. When it reaches the second temperature threshold, the current of the bidirectional voltage stabilizing circuit is reduced to 0.

[0046] (2) When the voltage of the single cell is lower than the first voltage threshold or higher than the second voltage threshold, the current of the bidirectional voltage stabilizing circuit is reduced to 0.

[0047] (3) The magnitude of the voltage threshold changes with the change of the temperature threshold.

[0048] (4) When multiple battery packs are discharging in parallel, the first started battery pack operates in a constant voltage state. After the remaining battery packs detect the existing voltage output, they will operate in a constant current state.

[0049] Among them, in the above technical solution, the handle 14 is provided with a locking tongue 141, a locking port, and a handgrip. The locking port is specifically a groove provided at the top of the handle 14. The locking port is connected to the locking tongue 141 by plugging. The handgrip is provided below the locking port and is used for the user to hold.

[0050] Further, in the above technical solution, the locking port 12 is provided with a groove for fixing the battery pack.

[0051] Further, in the above technical solution, the locking port 12 is provided with a spring-loading mechanism 121 and a triggering device 122. The spring-loading mechanism 121 includes at least one spring, a spring seat, and a spring hook. The spring is located on one or both sides of the locking port 12. The spring seat is fixed on the inner wall of the locking port 12. The spring hook is connected to one end of the spring and is used to guide the moving direction of the spring.

[0052] Further, in the above technical solution, the triggering device 122 includes a triggering rod, a triggering button, and a limiting block. One end of the triggering rod is connected to the spring loading mechanism 121, and the other end is connected to the triggering device 122. The limiting block is installed on the triggering rod and is used to limit the maximum stroke of the triggering rod.

[0053] The triggering device can refer to an emergency stop button triggering mechanism with the application number: CN201821915572.2 (publication (announcement) number: CN209418385U): It includes a mushroom head button, a sleeve, a triggering push rod, a triggering spring, and a reset spring; the mushroom head button is sleeved on the outer side wall of the top of the sleeve, and the mushroom head button is internally provided with an annular fixing platform. The triggering push rod is arranged above the inside of the sleeve, and the top of the triggering push rod is placed inside the annular fixing platform and is provided with an inclined surface guiding platform and a limiting window; on the inner wall of the annular fixing platform, there are inclined surface guiding tooth columns, and at the bottom of the annular fixing platform, there is a limiting boss; on the inner side of the sleeve, there is a guiding boss. The bottom of the triggering push rod is provided with upper, middle, and lower annular clamping platforms and first and second annular guiding grooves; the middle annular clamping platform is provided with a guiding notch; the lower annular clamping platform is provided with an assembly notch; the triggering spring is sleeved on the outer side of the top of the sleeve. At the bottom of the limiting window of the sleeve, there is a vertical groove, and at the bottom of the annular fixing platform, there is a fixing hole; on the inner side of the mushroom head button and the outer side of the sleeve, there are reset card slots, and at the bottom of the sleeve, there is a circuit connection device and a lighting module.

[0054] Further, in the above technical solution, the triggering rod and the spring loading mechanism 121 are connected by a spring hook, and the other end of the spring hook is connected to the spring.

[0055] Further, in the above technical solution, the handle 14 is specifically an antenna integrated handle.

[0056] Further, in the above technical solution, the wireless module 13 is composed of an A7680C chip and a ZSN603 chip.

[0057] Further, in the above technical solution, a guiding groove 123 is provided on the inner wall of the locking port 12, and the guiding groove 123 is used to guide the moving direction of the spring.

[0058] Further, in the above technical solution, the locking port 12 further includes an unlocking device. The unlocking device includes an unlocking rod, an unlocking button, and a reset spring. One end of the unlocking rod is connected to the spring loading mechanism 121, the other end is connected to the unlocking button, and the reset spring is installed on the unlocking rod.

[0059] The unlocking device refers to the side unlocking mechanism of the armrest cover with application number CN202020106697.1 (publication (announcement) number: CN211543330U): the armrest cover is covered on the armrest body and is locked with the armrest body by setting a flip claw, wherein the flip claw is provided with a lock hook portion for locking the armrest body and an unlocking portion provided with an inclined surface, and the side unlocking mechanism includes an unlocking button located on the side of the armrest cover and an unlocking transmission rod whose first end is connected to the unlocking button, and when the unlocking button is pressed, the second end of the unlocking transmission rod pushes the inclined surface of the unlocking portion to move in the direction of rotating and unlocking the lock hook portion relative to the second end of the unlocking transmission rod, thereby unlocking the armrest cover.

[0060] Specifically, the principle of the utility model is:

[0061] Improvements to the locking port:

[0062] Shape Improvement: Design a locking mouth with a spring-loaded mechanism, which can automatically close when the battery pack is inserted, forming a tighter connection and improving safety;

[0063] Spring loading mechanism: It includes a spring and a trigger device connected to it. The spring loading mechanism is activated when the battery pack is inserted, causing the locking port to automatically close and secure the battery pack;

[0064] Trigger device: includes a trigger rod, a trigger button and a limit block. One end of the trigger rod is connected to the spring loading mechanism, and the other end is connected to the trigger button. The limit block is installed on the trigger rod to limit the maximum travel of the trigger rod;

[0065] Working principle of the locking port:

[0066] Automatic closing of the locking port: When the battery pack is inserted into the locking port, the trigger button is pressed, the trigger rod moves and activates the spring loading mechanism. The spring in the spring loading mechanism is compressed, generating a restoring force, causing the locking port to close and form a tight connection;

[0067] Function of anti-slip structure: The anti-slip texture or material inside the locking port contacts the surface of the battery pack, increasing friction and preventing the battery pack from accidentally loosening during use;

[0068] Unlocking mechanism: The unlocking button includes an unlocking rod, an unlocking button and a return spring. When unlocking is required, the unlocking button is pressed, the unlocking rod moves and connects with the spring loading mechanism, releasing the locking state of the spring loading mechanism, so that the locking port can be opened, making it easy to remove the battery pack.

Claims

1. An electric bicycle battery pack with a bidirectional voltage stabilizing circuit, characterized in that: The invention comprises a housing (10), wherein the housing (10) is provided with a single battery (11), a locking port (12), a wireless module (13), a handle (14), a discharge interface (15), a charging interface (16) and a bidirectional voltage stabilizing circuit, and the housing (10) and the handle (14) constitute the housing (10); The single battery (11), the wireless module (13), the charging interface (16) and the bidirectional voltage stabilizing circuit are installed in the housing (10); the electrode of the single battery (11) is connected to the low voltage side of the bidirectional voltage stabilizing circuit; the high voltage side of the bidirectional voltage stabilizing circuit is connected to the discharge interface (15) and the charging interface (16); the auxiliary interface of the bidirectional voltage stabilizing circuit is connected to the wireless module (13) for supplying power to the wireless module (13) and performing data exchange; the antenna interface of the wireless module (13) is connected to the antenna interface of the handle (14); the charging interface (16) is arranged on the housing (10); the locking port (12) and the discharge interface (15) are on the handle (14).

2. The electric bicycle battery pack with a bidirectional voltage stabilizing circuit according to claim 1, characterized in that: The handle (14) is provided with a locking tongue (141), a locking opening (12) and a hand grip; the locking opening (12) is specifically a groove arranged at the top of the handle (14); the locking opening (12) and the locking tongue (141) are connected by plugging; the hand grip is arranged below the locking opening (12) for a user to hold.

3. The electric bicycle battery pack with a bidirectional voltage stabilizing circuit according to claim 2, characterized in that: The locking opening (12) is provided with a groove, and the groove is used to fix the battery pack.

4. The electric bicycle battery pack with a bidirectional voltage stabilizing circuit according to claim 3, characterized in that: The locking opening (12) is provided with a spring loading mechanism (121) and a trigger device (122); the spring loading mechanism (121) comprises at least one spring, a spring seat and a spring hook; the spring is located on one side or both sides of the locking opening (12); the spring seat is fixed on the inner wall of the locking opening (12); and the spring hook is connected to one end of the spring and is used to guide the moving direction of the spring.

5. The electric bicycle battery pack with a bidirectional voltage stabilizing circuit according to claim 4, characterized in that: The trigger device (122) comprises a trigger rod, a trigger button and a limit block, one end of the trigger rod is connected to the spring loading mechanism (121), and the other end is connected to the trigger device (122), and the limit block is installed on the trigger rod and is used to limit the maximum travel of the trigger rod.

6. The electric bicycle battery pack with a bidirectional voltage stabilizing circuit according to claim 5, characterized in that: The trigger rod is connected to the spring loading mechanism (121) via the spring hook, and the other end of the spring hook is connected to the spring.

7. The electric bicycle battery pack with a bidirectional voltage stabilizing circuit according to claim 6, characterized in that: The handle (14) is specifically an antenna-integrated handle.

8. The electric bicycle battery pack with a bidirectional voltage stabilizing circuit according to claim 7, characterized in that: The wireless module (13) is composed of an A7680C chip and a ZSN603 chip.

9. The electric bicycle battery pack with a bidirectional voltage stabilizing circuit according to claim 8, characterized in that: A guide groove (123) is provided on the inner wall of the locking opening (12), and the guide groove (123) is used to guide the moving direction of the spring.

10. The electric bicycle battery pack with a bidirectional voltage stabilizing circuit according to claim 9, characterized in that: The locking port (12) also includes an unlocking device, which includes an unlocking rod, an unlocking button and a reset spring, one end of the unlocking rod is connected to the spring loading mechanism (121), and the other end is connected to the unlocking button, and the reset spring is installed on the unlocking rod.

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