Battery thermal runaway detection device for electric bicycle

Abstract

The utility model relates to a battery thermal runaway detection device for an electric bicycle, and belongs to the technical field of electric bicycle battery detection. The battery thermal runaway detection device comprises a mounting frame, a controller is arranged on the mounting frame, the controller is connected with a temperature sensor, a positioning component and a binding belt are further arranged on the mounting frame, and one end of the binding belt is wound on a speed regulating handle of the electric bicycle. In the thermal runaway detection process, the detection end of the temperature sensor is tightly attached to the battery, the speed regulating handle is rotated to discharge the battery, the angle of the speed regulating handle is fixed through the positioning component in cooperation with the bridle in the battery discharging process, and the temperature of the loaded battery is measured through the temperature sensor in cooperation with the controller. The working state of the battery in the actual use process can be simulated, and safe travel guarantee is provided for people driving the electric bicycle.

Description

Technical Field

[0001] The utility model belongs to the technical field of electric bicycle battery detection, and in particular relates to a battery thermal runaway detection device for an electric bicycle. Background Art

[0002] Electric bicycles are an important choice for urban travel. They are also called battery vehicles or two-wheeled electric vehicles. As an environmentally friendly and convenient means of transportation, electric bicycles are gradually favored by more consumers. In the design and manufacturing process of electric bicycles, battery processing and production is a crucial component. The quality and stability of the battery are directly related to the performance and safety of the vehicle.

[0003] At present, the quality inspection of electric bicycle batteries mainly relies on the internal quality control system of the manufacturer and the quality inspection agency of the third party. The existing inspection methods usually use BMS technology to evaluate the working status of the battery by collecting data of the battery cells inside the battery, such as voltage, current and temperature. Among them, BMS is the abbreviation of Battery Management System. Although this solution can help determine the overall performance of the battery to a certain extent, it cannot accurately detect the actual working status of the battery after the battery is installed on the vehicle, especially in simulating the thermal runaway situation that may occur in the actual use of the battery. Utility Model Content

[0004] The purpose of the utility model is to provide a battery thermal runaway detection device for an electric bicycle in order to solve the above-mentioned problem.

[0005] The utility model achieves the above-mentioned purpose through the following technical solutions:

[0006] A battery thermal runaway detection device for an electric bicycle includes a mounting frame, a controller is provided on the mounting frame, the controller is connected to a temperature sensor, and the detection end of the temperature sensor is arranged on the battery of the electric bicycle, and a positioning component and a strap are also provided on the mounting frame, one end of the strap is wrapped around the speed regulating handle of the electric bicycle, and the positioning component is used to lock the other end of the strap to fix the rotation angle of the speed regulating handle. During the thermal runaway detection process, the driving wheel of the electric bicycle is first supported upward by the legs of the electric bicycle, and the sealing structure above the battery of the electric bicycle is opened, and then the mounting frame is moved to make the controller and the temperature sensor close to the battery, and then the detection end of the temperature sensor is closely attached to the battery, and the speed regulating handle is rotated to discharge the battery, and the driving wheel of the electric bicycle rotates accordingly. During the battery discharge process, the temperature of the mounted battery is measured by the temperature sensor in cooperation with the controller.

[0007] As a further optimization scheme of the utility model, the positioning component includes an articulated frame and an inclined plate fixed to the top of the mounting frame, and a positioning structure arranged on the inclined plate. A guide roller is hinged on the top of the articulated frame, and the guide roller is against the belt.

[0008] As a further optimization scheme of the utility model, the strap includes a traction strap and a hoop provided at one end of the traction strap, the hoop is tightly attached to the outer periphery of the speed control handle, and the other end of the traction strap is passed around the guide roller and connected to the positioning structure. In the process of rotating the speed control handle, the hoop at one end of the strap is firstly tightly clamped on the speed control handle of the electric bicycle, and the strap is wound around the hoop, then the speed control handle is rotated, and the other end of the strap is passed around the upper surface of the guide roller, and then the other end of the strap is fixed to the inclined plate through the positioning structure, so that the rotation angle of the speed control handle is fixed.

[0009] As a further optimization solution of the utility model, the positioning structure is a Velcro used to connect the other end of the traction belt.

[0010] As a further optimization scheme of the utility model, the hoop includes an annular belt fixed to one end of the traction belt, a locking belt fixed to the outside of the annular belt, and a first locking ring and a second locking ring passing through the annular belt. The locking belt is used to pass through the first locking ring and the second locking ring and tighten the speed control handle.

[0011] As a further optimization solution of the utility model, the mounting frame includes a support frame and a movable plate slidably arranged on the top of the support frame, and a mounting plate fixedly arranged below the movable plate, and the controller is arranged on the mounting plate.

[0012] As a further optimization solution of the utility model, an alarm connected to the controller is provided on the top of the movable plate.

[0013] As a further optimization solution of the utility model, a first caster and a second caster are provided at the bottom of the support frame.

[0014] As a further optimization solution of the utility model, a limiting component is provided on one side of the mounting frame, and a limiting groove corresponding to the front wheel of the electric bicycle is opened on the limiting component.

[0015] As a further optimization solution of the present utility model, the temperature sensor is a thin film temperature sensor.

[0016] The beneficial effects of the utility model are:

[0017] 1) In the process of thermal runaway detection, the utility model first supports the driving wheel of the electric bicycle, adjusts the mounting frame so that the temperature sensor is close to the battery, places the detection end of the temperature sensor close to the battery, rotates the speed regulating handle to discharge the battery, and fixes the speed regulating handle with the positioning component and the strap. The temperature of the battery is measured by the temperature sensor and the controller. The device can detect the thermal runaway condition of the battery after it is installed on the vehicle, and can simulate the working state of the battery during actual use, so as to provide safe travel protection for people driving electric bicycles;

[0018] 2) When the utility model rotates the speed regulating handlebar, the hoop is firstly fastened on the speed regulating handlebar of the electric bicycle, and the strap is wound around the hoop, and then the speed regulating handlebar is rotated, and the other end of the strap is passed around the guide roller, and the other end of the strap is fixed on the inclined plate through the positioning structure to fix the rotation angle of the speed regulating handlebar. During the detection process, it is not necessary to hold the speed regulating handlebar all the time, thereby improving the convenience of thermal runaway detection;

[0019] 3) In the process of moving the mounting frame to bring it close to the battery, the movable plate can be moved to one side of the support frame to prevent the mounting plate below the movable plate from interfering with the moving operation. After the mounting frame is in place, the movable plate is moved horizontally to bring the mounting plate and the controller and temperature sensor on the mounting plate close to the battery, which is convenient for fixing the detection end of the temperature sensor and further improving the convenience of operation;

[0020] 4) When the temperature measured by the temperature sensor reaches the threshold value, the controller of the utility model sends out an alarm through the alarm to prompt the inspection personnel, reminding them to remove the battery or reset the speed control handle to avoid safety hazards caused by thermal runaway of the battery during the inspection process. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 This is a schematic diagram of the working state of the utility model during thermal runaway testing;

[0022] Figure 2 yes Figure 1 The enlarged view of point A in the middle;

[0023] Figure 3 It is a schematic diagram of the structure of the mounting frame of the utility model;

[0024] Figure 4 It is a schematic diagram of the strap structure of the utility model.

[0025] In the figure: 1. mounting frame; 2. controller; 3. temperature sensor; 4. positioning component; 5. strap; 6. alarm; 7. limiting component; 11. supporting frame; 12. movable plate; 13. mounting plate; 14. first caster; 15. second caster; 41. articulated frame; 42. guide roller; 43. inclined plate; 44. positioning structure; 51. traction belt; 52. annular belt; 53. locking belt; 54. first locking ring; 55. second locking ring; C. battery; H. speed control handle. DETAILED DESCRIPTION

[0026] The present application is further described in detail below in conjunction with the accompanying drawings. It is necessary to point out here that the following specific implementation methods are only used to further illustrate the present application and cannot be understood as limiting the scope of protection of the present application. Technical personnel in this field can make some non-essential improvements and adjustments to the present application based on the above application content.

[0027] Example

[0028] like Figure 1-3 As shown, a battery thermal runaway detection device for an electric bicycle comprises a mounting frame 1, a controller 2 is provided on the mounting frame 1, a temperature sensor 3 is connected to the controller 2, and the detection end of the temperature sensor 3 is arranged on the battery C of the electric bicycle, and a positioning component 4 and a strap 5 are also provided on the mounting frame 1, one end of the strap 5 is wrapped around the speed regulating handle H of the electric bicycle, and the positioning component 4 is used to lock the other end of the strap 5 to fix the rotation angle of the speed regulating handle H. The temperature sensor 3 is preferably a thin film temperature sensor, and at least one thin film temperature sensor is correspondingly arranged on each battery C in the electric bicycle, and the detection end of the sensor is fixed to the outer surface of the battery C by a thermal conductive adhesive. Specifically, the positioning component 4 comprises an articulated frame 41 and an inclined plate 43 fixedly arranged on the top of the mounting frame 1, and a positioning structure 44 arranged on the inclined plate 43, and a guide roller 42 is hinged on the top of the articulated frame 41, and the guide roller 42 is against the strap 5. The strap 5 includes a traction belt 51 and a hoop provided at one end of the traction belt 51 . The hoop is tightly attached to the outer periphery of the speed regulating handle H. The other end of the traction belt 51 passes over the guide roller 42 and is connected to the positioning structure 44 .

[0029] During the thermal runaway detection process, the driving wheel of the electric bicycle is first supported upward by the legs of the electric bicycle, and the sealing structure above the battery C of the electric bicycle is opened. It should be noted that for an electric bicycle in which the battery C is installed under the seat, the seat is the sealing structure, and this embodiment is also mainly applicable to such electric bicycles. After the battery C is exposed, the mounting frame 1 is moved again to bring the controller 2 and the temperature sensor 3 close to the battery C, and then the detection end of the temperature sensor 3 is closely attached to the battery C, and the speed control handle H is rotated to discharge the battery C, and the driving wheel of the electric bicycle rotates accordingly. During the discharge of the battery C, the temperature of the battery C is measured by the temperature sensor 3 in cooperation with the controller 2, and the controller 2 displays the temperature change of the battery C on the display to show whether the battery has thermal runaway. When the temperature of the battery C rises rapidly, it indicates that the thermal runaway phenomenon has occurred, and at this time, the battery C is removed or the speed control handle H is reset. The device can detect the thermal runaway condition of the battery C after it is installed on the vehicle, and can simulate the working state of the battery C during actual use, providing safe travel protection for people driving electric bicycles.

[0030] Specifically, see Figure 4 The hoop includes an annular belt 52 fixed to one end of the traction belt 51, a locking belt 53 fixed to the outside of the annular belt 52, and a first locking ring 54 and a second locking ring 55 that pass through the annular belt 52. The locking belt 53 is used to pass through the first locking ring 54 and the second locking ring 55 and tightly clamp the speed control handle H. The positioning structure 44 is preferably Velcro. The surface of the annular belt 52 has a fluff layer that cooperates with the hook structure on the Velcro. When tightening the speed control handle H, the locking belt 53 first passes through the first locking ring 54 and the second locking ring 55 in sequence, and then passes through the first locking ring 54 again from the outside of the second locking ring 55.

[0031] During the process of rotating the speed control handlebar H, first tighten the hoop at one end of the strap 5 on the speed control handlebar H of the electric bicycle, and wrap the strap 5 around the hoop, then rotate the speed control handlebar H, and pass the other end of the strap 5 around the upper surface of the guide roller 42, and then fix the other end of the strap 5 on the inclined plate 43 through the positioning structure 44, so that the rotation angle of the speed control handlebar H is fixed, and the speed control handlebar H does not need to be held by hand during the detection process, thereby improving the convenience of thermal runaway detection. In addition, the above-mentioned positioning structure 44 can also be a positioning pin set on the inclined plate 43, and accordingly, a plurality of pin holes can be opened on the traction belt 51 of the strap 5, and a hard annular structure for the positioning pin to pass through can be set on the edge of the pin hole. In addition, the hoop can also be an annular elastic structure, and the hoop can be set on the outside of the speed control handlebar H by interference fit, and the hoop can also be other belt-like structures that can be locked together end to end.

[0032] Furthermore, if Figure 3As shown, the mounting frame 1 includes a support frame 11 and a movable plate 12 slidably arranged on the top of the support frame 11, and a mounting plate 13 fixedly arranged below the movable plate 12, and the controller 2 is arranged on the mounting plate 13. In the process of moving the mounting frame 1 to make it close to the battery C, the movable plate 12 can be moved to one side of the support frame 11 to prevent the mounting plate 13 below the movable plate 12 from interfering with the above-mentioned moving operation. After the mounting frame 1 is in place, the movable plate 12 is moved horizontally to make the mounting plate 13 and the controller 2 and the temperature sensor 3 on the mounting plate 13 close to the battery C, so as to facilitate fixing the detection end of the temperature sensor 3, further improve the convenience of operation, and also facilitate adaptation to different electric bicycle models.

[0033] Further, see Figure 3 , an alarm 6 connected to the controller 2 is provided at the top of the movable plate 12. A first caster 14 and a second caster 15 are provided at the bottom of the support frame 11. Two first casters 14 and two second casters 15 are provided. The first caster 14 is preferably a universal wheel, and the second caster 15 is preferably an electric wheel. The electric wheel has a built-in hub motor, and the hub motor is electrically connected to the controller 2. When the temperature measured by the temperature sensor 3 reaches the threshold, the controller 2 sends an alarm through the alarm 6 to prompt the inspection personnel, reminding the inspection personnel to remove the battery C or reset the speed control handle H to avoid safety hazards caused by thermal runaway of the battery during the inspection process.

[0034] At the same time, when the temperature measured by the temperature sensor 3 reaches the threshold, the controller 2 controls the hub motor of the electric wheel to work, so that the electric wheel drives the mounting frame 1 to approach the speed regulating handle H, and the contact belt 5 limits the angle of the speed regulating handle H, so that the speed regulating handle H is reset and the battery C stops discharging, further improving the safety of thermal runaway detection. In addition, a limiting component 7 is provided on one side of the mounting frame 1, and a limiting groove corresponding to the front wheel of the electric bicycle is opened on the limiting component 7. The limiting component 7 can be fixed on the ground at the detection site, or it can be connected to the mounting frame 1 through two sets of connecting rods to limit the swing of the front wheel of the electric bicycle, so that the detection personnel can fix the angle of the speed regulating handle H conveniently.

[0035] The above-mentioned embodiments only express several implementation methods of the utility model, and the description is relatively specific and detailed, but it cannot be understood as limiting the scope of the patent of the utility model. It should be pointed out that for ordinary technicians in this field, several modifications and improvements can be made without departing from the concept of the utility model, which all belong to the protection scope of the utility model.

Claims

1. A battery thermal runaway detection device for an electric bicycle, comprising a mounting frame (1), characterized in that: The mounting frame (1) is provided with a controller (2), the controller (2) is connected to a temperature sensor (3), and the detection end of the temperature sensor (3) is arranged on the battery of the electric bicycle. The mounting frame (1) is also provided with a positioning component (4) and a strap (5), one end of the strap (5) is wound around the speed regulating handlebar of the electric bicycle, and the positioning component (4) is used to lock the other end of the strap (5) to fix the rotation angle of the speed regulating handlebar.

2. The battery thermal runaway detection device according to claim 1, characterized in that: The positioning component (4) comprises an articulated frame (41) and an inclined plate (43) fixed to the top of the mounting frame (1), and a positioning structure (44) arranged on the inclined plate (43); a guide roller (42) is hinged on the top of the articulated frame (41), and the guide roller (42) abuts against the belt (5).

3. The battery thermal runaway detection device according to claim 2, characterized in that: The strap (5) comprises a traction belt (51) and a hoop provided at one end of the traction belt (51), wherein the hoop is tightly attached to the outer circumference of the speed regulating handle, and the other end of the traction belt (51) passes around a guide roller (42) and is connected to a positioning structure (44).

4. The battery thermal runaway detection device according to claim 3, characterized in that: The positioning structure (44) is a Velcro used to connect the other end of the traction belt (51).

5. The battery thermal runaway detection device according to claim 3, characterized in that: The hoop comprises an annular belt (52) fixed to one end of the traction belt (51), a locking belt (53) fixed to the outside of the annular belt (52), and a first locking ring (54) and a second locking ring (55) passing through the annular belt (52); the locking belt (53) is used to pass through the first locking ring (54) and the second locking ring (55) and to tightly clamp the speed control handle.

6. The battery thermal runaway detection device according to claim 1, characterized in that: The mounting frame (1) comprises a support frame (11), a movable plate (12) slidably arranged on the top of the support frame (11), and a mounting plate (13) fixedly arranged below the movable plate (12); the controller (2) is arranged on the mounting plate (13).

7. The battery thermal runaway detection device according to claim 6, characterized in that: An alarm (6) connected to the controller (2) is provided on the top of the movable plate (12).

8. The battery thermal runaway detection device according to claim 6, characterized in that: The bottom of the support frame (11) is provided with a first caster (14) and a second caster (15).

9. The battery thermal runaway detection device according to claim 1, characterized in that: A limiting component (7) is provided on one side of the mounting frame (1), and a limiting groove corresponding to the front wheel of the electric bicycle is provided on the limiting component (7).

10. The battery thermal runaway detection device according to claim 1, characterized in that: The temperature sensor (3) is a thin film temperature sensor.

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