Electric bicycle battery system compatible with thermal safety protection and vehicle-mounted charger

Abstract

The invention discloses an electric bicycle battery system compatible with thermal safety protection and a vehicle-mounted charger, and particularly relates to the technical field of new energy power batteries and power supply systems, and through an electric bicycle charger circuit structure, the temperature change condition of each hardware in the use process and the degree of influence on the charger safety are tested; the temperature monitoring area of the charger is determined, meanwhile, a battery sensing device is arranged in the charger, the current change situation in the charging process can be monitored in real time, and it is ensured that a battery system is damaged due to the fact that the current is too large; a charger performance evaluation and active protection strategy based on'electricity and heat 'coupling is designed, the problem of safe use of an electric bicycle charger is solved, and an electric bicycle battery system with'charger built-in, an internal battery management system and external safety protection' is built by establishing an'electricity and heat 'electric bicycle charging safety monitoring technology. The characteristics of the battery and the charger can be reflected timely and accurately.

Description

Technical Field

[0001] The present invention relates to the technical field of new energy power batteries and power supply systems, and in particular to an electric motorcycle battery system that is compatible with thermal safety protection and an on-board charger. Background Art

[0002] Motorcycles are the main means of transportation for short-distance, low-speed, and portable travel in my country's cities, and are also an important measure for my country to promote carbon neutrality and achieve carbon peak. Batteries are the main energy source for electric motorcycles. In order to meet the general demand of the public for electric travel, current products mainly focus on "capacity", "structure" and "cost". However, due to the lack of performance prediction and safety protection technology for the power system of electric motorcycles, it is impossible to intuitively present and accurately judge the aging status of the battery pack. Long-term use of batteries exacerbates the aging of the power system. Once the battery loses control, there is no reasonable emergency protection, which leads to frequent fire accidents of electric motorcycles, seriously affecting urban life safety and the development of low-carbon and portable transportation.

[0003] The main reasons are as follows:

[0004] 1. Lack of effective battery safety protection system. In order to facilitate production, the battery pack and charger are usually separated when making the battery system of electric motorcycles. Only the battery protection board is used to ensure that the battery is within the safe voltage range, while the charger is wrapped in a simple plastic shell. The temperature changes inside the battery and the charger cannot be predicted during use, and the safety issues of the battery pack and charger are not considered enough;

[0005] Second, the battery charger aging information monitoring is missing. Considering cost saving, most motorcycle chargers are composed of AC-DC module, heat dissipation module, and basic protection module. They lack the monitoring of their own performance aging. As a result, after long-term use, the dust inside the charger increases, the temperature rises, and the performance declines without self-checking. In serious cases, the charger temperature will be too high or even catch fire, posing a safety hazard.

[0006] 3. The safety protection effect of the battery system structure is low. Compared with the safety and stability of the battery system, many motorcycle battery manufacturers pay more attention to the gorgeous appearance structure and high energy output. The safety isolation and flame retardant design of the battery system thermal failure process needs to be strengthened. Summary of the invention

[0007] In order to overcome the above-mentioned defects of the prior art, an embodiment of the present invention provides an electric motorcycle battery system that is compatible with thermal safety protection and an on-board charger to solve the problems raised in the above-mentioned background technology.

[0008] To achieve the above object, the present invention provides the following technical solution: an electric motorcycle battery system compatible with thermal safety protection and an on-board charger, comprising an electric motorcycle battery body compatible with a charger, comprising the following steps:

[0009] S1. Considering the battery voltage level and battery specification uniformity, an integrated circuit design method is adopted to form a unified connection board for battery pack series connection and information collection, which is convenient for battery pack combination and assembly, and ensures the stability of battery series connection and the convenience of battery information reception;

[0010] S2. Combine the charger with the battery pack and adopt a series of fixed structures to ensure that the battery pack, charger module and battery management system can be fixed in the same equipment. The fixing device is designed with flame-retardant materials to ensure effective isolation of fire in the event of battery failure.

[0011] S3. Considering the safe use of the battery pack, an insulating flame-retardant shell is designed to wrap and protect the battery pack based on the battery pack compatible with the charger; a movable handle is designed on the shell to effectively improve the portability of charging, discharging and assembling the battery pack; at the same time, the battery pack shell is equipped with a 48V socket, a communication socket and a charging socket; the design of the three takes into account traditional battery charging equipment, and also considers the external communication of the battery pack, which is conducive to improving the coverage of the battery pack;

[0012] As a preferred technical solution, a BMS board is installed at the front end of the battery body of the motorcycle compatible with the charger, fixing devices are installed at the outer corners of the battery body of the motorcycle compatible with the charger, a charger 1 is installed at one end of the right side of the battery body of the motorcycle compatible with the charger close to the bottom surface, a mounting base is fitted below the battery body of the motorcycle compatible with the charger, and a charger fixing part 1 and a charger fixing part 2 are installed on the side of the fixing device;

[0013] As a preferred technical solution, a collection connection plate is installed on the upper part of the battery body of the electric motorcycle compatible with the charger, the outer side of the collection connection plate is wrapped with an epoxy resin plate, a battery information input port and a pole connection hole are opened on the upper part of the collection connection plate, a built-in series circuit is installed inside the collection connection plate, and a fixed connection hole is installed on the side of the collection connection plate;

[0014] As a preferred technical solution, an upper cover is installed on the upper part of the battery body of the electric motorcycle compatible with the charger, a movable handle is installed on the inner side of the upper cover, a 48V socket is opened under the upper cover, and a communication socket and a charging socket are opened on the side of the 48V socket.

[0015] Technical effects and advantages of the present invention:

[0016] 1. The present invention uses the circuit structure of the motorcycle charger to test the temperature changes of various hardware during use and the degree of impact on the safety of the charger, and determines the temperature monitoring area of ​​the charger. At the same time, the charger has a built-in battery sensor device, which can monitor the current changes during the charging process in real time to ensure that excessive current does not cause damage to the battery system.

[0017] 2. Through the internal temperature changes of the motorcycle battery charger during use, design a charger performance evaluation and active protection strategy based on "electrical and thermal" coupling to solve the problem of safe use of motorcycle chargers. By establishing "electrical and thermal" motorcycle charging safety monitoring technology, build an electric motorcycle battery system with "built-in charger + internal battery management system + external safety protection", realize timely and accurate reflection of battery and charger characteristics, and ensure safety protection when the battery fails by carrying out battery pack structure design, providing new technical means for the safe application of urban electric motorcycles.

[0018] 3. Based on the motorcycle structure and battery pack specifications, a universal safety isolation and high-stability battery pack shell protection structure is designed to solve the problem of the motorcycle battery being out of control, and the system has safety protection functions such as sealing and flame retardancy. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 A schematic diagram of the overall structure of a charger-compatible battery pack of the present invention;

[0020] Figure 2 It is a schematic diagram of the connection structure of the battery base and the fixing member of the present invention;

[0021] Figure 3 This is a schematic diagram of the design structure of the battery series connection and voltage information collection connection board of the present invention;

[0022] Figure 4 This is a schematic diagram of the design of the electric bicycle battery management system of the present invention;

[0023] Figure 5 A schematic diagram of the battery grouping and series connection design of the present invention;

[0024] Figure 6 It is a schematic diagram of the design of the built-in temperature and current sensor system of the present invention;

[0025] Figure 7 It is a schematic diagram of the charger performance evaluation model formula of the present invention.

[0026] The accompanying drawings are marked as follows: 1. Electric motorcycle battery body compatible with charger; 11. BMS board; 12. Fixing device; 13. Mounting base; 14. Charger 1; 15. Charger fixing part 1; 16. Charger fixing part 2; 2. Collection connection board; 21. Epoxy resin board; 22. Battery information input port; 23. Built-in series circuit; 24. Pole connection hole; 25. Fixed connection hole; 3. Upper cover; 31. Movable handle; 32. 48V socket; 33. Communication socket; 34. Charging socket. DETAILED DESCRIPTION

[0027] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0028] It should be noted that, unless otherwise specified, the technical terms or scientific terms used in this application should have the common meanings understood by those skilled in the art to which the invention belongs.

[0029] according to Figure 1-4 As shown, a motorcycle battery system compatible with thermal safety protection and an on-board charger includes a motorcycle battery body 1 compatible with a charger, and includes the following steps:

[0030] S1. Considering the battery voltage level and battery specification uniformity, an integrated circuit design method is adopted to form a unified connection board for battery pack series connection and information collection, which is convenient for battery pack combination and assembly, and ensures the stability of battery series connection and the convenience of battery information reception;

[0031] S2. Combine the charger with the battery pack and adopt a series of fixed structures to ensure that the battery pack, charger module and battery management system can be fixed in the same equipment. The fixing device is designed with flame-retardant materials to ensure effective isolation of fire in the event of battery failure.

[0032] S3. Considering the safe use of the battery pack, an insulating flame-retardant shell is designed to wrap and protect the battery pack based on the battery pack compatible with the charger; a movable handle is designed on the shell to effectively improve the portability of charging, discharging and assembling the battery pack; at the same time, the battery pack shell is equipped with a 48V socket, a communication socket and a charging socket; the design of the three takes into account traditional battery charging equipment, and also considers the external communication of the battery pack, which is conducive to improving the coverage of the battery pack;

[0033] 3. Specifically, S1 and S2 include: charger performance evaluation and monitoring aims to build a temperature monitoring device and a current information collection device on the basis of the existing motorcycle charger (48V). This technology includes a charger information collection device, a performance evaluation model, and a charger safety real-time monitoring module. The charger information collection device will collect / calculate the internal temperature of the charger in real time, and on this basis, study the temperature change law of the motorcycle charger. The charger performance evaluation model uses the collected charger internal temperature and charger current information and adopts a weight algorithm to build a charger performance evaluation model to solve the problem of predicting the safety of the charger during the charging process.

[0034] The charger performance evaluation model uses the collected charger internal temperature and charger current information, and adopts a weight algorithm to build a charger performance evaluation model to solve the problem of predicting the safety of the charger during the charging process, study the formation mechanism of the hardware circuit and safety characteristics of the motorcycle charger, and build an electric motorcycle charger performance evaluation model based on "electricity and heat". According to the circuit structure of the motorcycle charger, the temperature changes of each hardware during use and the degree of impact on the safety of the charger are tested, and the charger temperature monitoring area is determined. At the same time, the charger has a built-in battery sensor device, which can monitor the current changes during the charging process in real time to ensure that excessive current will cause damage to the battery system. According to the temperature sensor and current sensor set by the system, a charger performance evaluation model is established. Its expression is as follows:

[0035] σ=a1T+a2I(a1+a2=0)

[0036] In the formula, σ is the charger performance evaluation index; T is the charger temperature; I is the instantaneous current during the use of the charger; a1 is the weight of the charger temperature change in the entire performance evaluation index; a2 is the weight of the charger current change in the entire performance evaluation index; a1 and a2 can be dynamically adjusted according to the actual application situation. According to the formula, the information obtained by the charger temperature and current sensors is transmitted to the battery management system main control chip, which analyzes and obtains the information, and on this basis, the charger performance is graded and judged, thereby realizing real-time monitoring of charger safety.

[0037] Specifically, S3 includes: feeding back the charger performance to the main control chip of the battery management system, processing it together with the battery pack information, and transmitting it to external devices via RS485 or CAN. The information processing process analyzes the battery performance. If the battery performance does not meet the safety level, the battery fault information is fed back to prevent the battery from being used again in time.

[0038] See also Figure 1-2As shown, as another embodiment of the present analysis method, a BMS board 11 is installed at the front end of the battery body 1 of a motorcycle compatible with a charger, fixing devices 12 are installed at the outer corners of the battery body 1 of the motorcycle compatible with a charger, a charger 14 is installed at the right end of the battery body 1 of the motorcycle compatible with a charger close to the bottom surface, a mounting base 13 is fitted at the bottom of the battery body 1 of the motorcycle compatible with a charger, and a charger fixing part 15 and a charger fixing part 2 16 are installed on the side of the fixing device 12;

[0039] By setting a battery mounting base 13, a BMS board 11 and a charger fixing part. The battery mounting base 13 is used to fix the position of the square battery, and the BMS board 11 and the charger fixing part are connected to the collection connection board 2 and the battery mounting base 13; the BMS board 11 and the charger 14 are respectively installed in front of and on the side of the battery pack, thereby ensuring the fixed connection of the battery pack and related accessories.

[0040] See also Figure 3 As shown, as another embodiment of the present analysis method, a collection connection plate 2 is installed on the upper side of the battery body 1 of a motorcycle compatible with a charger, and the outer side of the collection connection plate 2 is wrapped with an epoxy resin plate 21, and a battery information input port 22 and a pole connection hole 24 are provided on the upper side of the collection connection plate 2, and a built-in series circuit 23 is installed inside the collection connection plate 2, and a fixed connection hole 25 is installed on the side of the collection connection plate 2;

[0041] Through the battery series connection and voltage information collection connection board, considering the battery pack fixation, series connection and data collection, the collection connection board 2 is made of epoxy resin, and the corresponding pole connection hole 24 is designed according to the battery pole spacing; at the same time, according to the series connection state and voltage collection logic, the corresponding series connection copper wire and data collection connection line are designed on the board; the data collection connection line finally converges at the battery information output port, and the battery management system can be directly connected to the connection port to form information collection. The corresponding fixed connection holes 25 are set around the connection board to meet the fixed connection between the connection board and the battery pack and other connectors.

[0042] See also Figure 4 As shown, as another embodiment of the present analysis method, an upper cover 3 is installed on the upper part of the battery body 1 of the electric motorcycle compatible with the charger, a movable handle 31 is installed on the inner side of the upper cover 3, a 48V socket 32 ​​is opened under the upper cover 3, and a communication socket 33 and a charging socket 34 are opened on the side of the 48V socket 32;

[0043] An insulating fireproof isolation structure for the battery pack is established. According to the size of the battery mounting base 13 and the battery height, the battery pack shell is designed with aluminum alloy. The inside and outside of the shell are coated with insulating flame-retardant materials, and a 48V socket 32, a communication socket 33, and a charging socket 34 are respectively arranged on the side of the shell to meet the needs of the battery pack to power the motor, feedback information to the outside, and supply AC power. In addition, a movable handle 31 is arranged on the upper box cover of the shell to facilitate the replacement and removal of the battery pack and separate charging.

[0044] This analysis method provides a scientific, efficient and intelligent analysis theory for the operation of large-scale enterprise information systems:

[0045] Based on the existing motorcycle charger (48V), a built-in temperature monitoring device and a current information collection device are installed. This technology includes a charger information collection device, a performance evaluation model, and a charger safety real-time monitoring module. The charger information collection device will collect / calculate the internal temperature of the charger in real time. On this basis, the temperature change law of the motorcycle charger is studied. The charger performance evaluation model uses the collected charger internal temperature and charger current information and adopts a weight algorithm to build a charger performance evaluation model to solve the problem of predicting the safety of the charger during the charging process.

[0046] Then, by using the collected internal temperature and current information of the charger, a charger performance evaluation model is constructed using a weight algorithm to solve the problem of predicting the safety of the charger during the charging process, study the formation mechanism of the hardware circuit and safety characteristics of the motorcycle charger, and build an electric motorcycle charger performance evaluation model based on "electricity and heat". According to the circuit structure of the motorcycle charger, the temperature changes of each hardware during use and the degree of impact on the safety of the charger are tested, and the charger temperature monitoring area is determined. At the same time, the charger has a built-in battery sensor device, which can monitor the current changes during the charging process in real time to ensure that excessive current does not cause damage to the battery system. According to the temperature sensing and current sensing set by the system, a charger performance evaluation model is established. According to the formula, the information obtained by the charger temperature and current sensors is transmitted to the main control chip of the battery management system, which is analyzed by the main control chip and the charger performance is graded on this basis, thereby realizing real-time monitoring of the charger safety.

[0047] The charger performance is then fed back to the main control chip of the battery management system, where it is processed together with the battery pack information and can be transmitted to external devices via RS485 or CAN. The information processing process analyzes the battery performance. If the battery performance does not meet the safety level, the battery failure information is fed back to prevent the battery from being used again.

[0048] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein by equivalents. These modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present invention, and they should all be included in the scope of the claims and specification of the present invention.

Claims

1. An electric motorcycle battery system compatible with thermal safety protection and an on-board charger, comprising an electric motorcycle battery body (1) compatible with a charger, characterized in that: The steps include: S1. Considering the battery voltage level and battery specification uniformity, an integrated circuit design method is adopted to form a unified connection board for battery pack series connection and information collection, which is convenient for battery pack combination and assembly, and ensures the stability of battery series connection and the convenience of battery information reception; S2. Combine the charger with the battery pack and adopt a series of fixed structures to ensure that the battery pack, charger module and battery management system can be fixed in the same equipment. The fixing device is designed with flame-retardant materials to ensure effective isolation of fire in the event of battery failure. S3. Considering the safe use of the battery pack, an insulating flame-retardant shell is designed to wrap and protect the battery pack based on the battery pack compatible with the charger; a movable handle is designed on the shell to effectively improve the portability of charging, discharging and assembly of the battery pack; at the same time, the battery pack shell is equipped with a 48V socket, a communication socket and a charging socket; the design of the three takes into account traditional battery charging equipment, while also considering the external communication of the battery pack, which is conducive to improving the coverage of the battery pack.

2. The electric motorcycle battery system compatible with thermal safety protection and on-board charger according to claim 1, characterized in that The S1 and S2 specifically include: the charger performance evaluation and monitoring is aimed at building a temperature monitoring device and a current information collection device on the basis of the existing motorcycle charger (48V). This technology includes a charger information collection device, a performance evaluation model, and a charger safety real-time monitoring module. The charger information collection device will collect / calculate the internal temperature of the charger in real time, and on this basis, study the temperature change law of the motorcycle charger. The charger performance evaluation model uses the collected charger internal temperature and charger current information and adopts a weight algorithm to construct a charger performance evaluation model to solve the problem of predicting the safety of the charger during the charging process. The charger performance evaluation model uses the collected charger internal temperature and charger current information, and adopts a weight algorithm to build a charger performance evaluation model to solve the problem of predicting the safety of the charger during the charging process, study the formation mechanism of the hardware circuit and safety characteristics of the motorcycle charger, and build an electric motorcycle charger performance evaluation model based on "electricity and heat". According to the circuit structure of the motorcycle charger, the temperature changes of each hardware during use and the degree of impact on the safety of the charger are tested, and the charger temperature monitoring area is determined. At the same time, the charger has a built-in battery sensor device, which can monitor the current changes during the charging process in real time to ensure that excessive current will cause damage to the battery system. According to the temperature sensor and current sensor set by the system, a charger performance evaluation model is established. Its expression is as follows: σ=a1T+a2I(a1+a2=0) In the formula, σ is the charger performance evaluation index; T is the charger temperature; I is the instantaneous current during the charger use process; a1 is the weight of the charger temperature change in the entire performance evaluation index; a2 is the weight of the charger current change in the entire performance evaluation index; a1 and a2 can be dynamically adjusted according to the actual application situation. According to the formula, the information obtained by the charger temperature and current sensor is transmitted to the battery management system main control chip, which analyzes and obtains the information, and on this basis, the charger performance is graded and judged, thereby realizing real-time monitoring of charger safety; S3 includes: feeding back the charger performance to the main control chip of the battery management system, processing it together with the battery pack information, and transmitting it to external devices via RS485 or CAN. The information processing process analyzes the battery performance, and if the battery performance does not meet the safety level, the battery fault information is fed back to prevent the battery from being used again in time.

3. The electric motorcycle battery system compatible with thermal safety protection and on-board charger according to claim 1, characterized in that: A BMS board (11) is installed at the front end of the motorcycle battery body (1) of the compatible charger, and fixing devices (12) are installed at the outer corners of the motorcycle battery body (1) of the compatible charger. A charger 1 (14) is installed at the right end of the motorcycle battery body (1) of the compatible charger close to the bottom surface, and a mounting base (13) is installed at the bottom of the motorcycle battery body (1) of the compatible charger, and a charger fixing part 1 (15) and a charger fixing part 2 (16) are installed on the side of the fixing device (12).

4. The electric motorcycle battery system compatible with thermal safety protection and on-board charger according to claim 1, characterized in that: A collection connection plate (2) is docked and installed on the upper side of the battery body (1) of the electric motorcycle compatible with the charger, the outer side of the collection connection plate (2) is wrapped with an epoxy resin plate (21), a battery information input port (22) and a pole connection hole (24) are provided on the upper side of the collection connection plate (2), a built-in series circuit (23) is installed inside the collection connection plate (2), and a fixed connection hole (25) is installed on the side of the collection connection plate (2).

5. The electric motorcycle battery system compatible with thermal safety protection and on-board charger according to claim 1, characterized in that: An upper cover (3) is installed above the battery body (1) of the electric motorcycle compatible with the charger, a movable handle (31) is installed on the inner side of the upper cover (3), a 48V socket (32) is provided below the upper cover (3), and a communication socket (33) and a charging socket (34) are provided on the side of the 48V socket (32).

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