CN111665402A - System and method for monitoring line aging of electric bicycle - Google Patents
System and method for monitoring line aging of electric bicycle Download PDFInfo
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- CN111665402A CN111665402A CN201910163270.7A CN201910163270A CN111665402A CN 111665402 A CN111665402 A CN 111665402A CN 201910163270 A CN201910163270 A CN 201910163270A CN 111665402 A CN111665402 A CN 111665402A
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- 238000012544 monitoring process Methods 0.000 title claims abstract description 57
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- 239000000523 sample Substances 0.000 claims abstract description 18
- 238000004891 communication Methods 0.000 claims description 21
- 238000001514 detection method Methods 0.000 description 12
- 238000007726 management method Methods 0.000 description 4
- 230000002265 prevention Effects 0.000 description 3
- 238000007599 discharging Methods 0.000 description 2
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/003—Environmental or reliability tests
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Abstract
The invention discloses a line aging monitoring system of an electric bicycle, wherein the electric bicycle comprises a battery and a power supply main line, and the system comprises: the temperature probe is arranged on the power supply main line and used for acquiring temperature data of the power supply main line; and the line aging monitoring unit is used for acquiring the temperature data of the power supply main line, acquiring the current of the power supply main line when the temperature data of the power supply main line reaches a preset highest temperature, and judging whether the power supply main line is in an overload state, a suspected aging state or an aging state according to the current value of the power supply main line. The invention can realize automatic monitoring of the power supply line of the electric bicycle and judge the use state of the power supply line, thereby reducing the potential safety hazard.
Description
Technical Field
The invention relates to an electric bicycle, in particular to a line aging monitoring system and method for the electric bicycle.
Background
The electric bicycle is simple, light, flexible and low in use cost, is a transportation tool for production and life of people, brings convenience to people, brings social problems of environmental sanitation pollution and the like caused by electric bicycle theft, battery theft, traffic accidents, fire disasters and random scrapping and discarding, and brings great troubles to the influence on the problems of harming property and life of people and social management work of social managers. The hidden danger that current electric bicycle exists includes that battery life and circuit are ageing, wherein because the circuit is hidden inside the vehicle, is difficult for the user to master, so when the power supply line exists unusually, the user is difficult to or some abnormal conditions, leads to the unable monitoring of potential safety hazard and investigation.
Disclosure of Invention
The invention aims to solve the technical problem of providing a system and a method for monitoring the line aging of an electric bicycle, which can realize automatic monitoring of a power supply line of the electric bicycle and judge the service state of the power supply line so as to reduce potential safety hazards.
In order to solve the technical problems, the invention adopts the following technical scheme.
An electric bicycle line aging monitoring system, electric bicycle is including battery and power supply mainline, the system including: the temperature probe is arranged on the power supply main line and used for acquiring temperature data of the power supply main line; and the line aging monitoring unit is used for acquiring the temperature data of the power supply main line, acquiring the current of the power supply main line when the temperature data of the power supply main line reaches a preset highest temperature, and judging whether the power supply main line is in an overload state, a suspected aging state or an aging state according to the current value of the power supply main line.
Preferably, the system comprises a communication unit, and the communication unit is configured to upload the state information of the power supply main line determined by the line aging monitoring unit to a server, so that a user terminal can obtain the state information.
A method for monitoring line aging of an electric bicycle comprises a battery and a power supply main line, and is realized based on a system, wherein the system comprises a temperature probe and a line aging monitoring unit, the temperature probe is installed on the power supply main line, and the method comprises the following steps: and acquiring the temperature data of the power supply main line by using the line aging monitoring unit, acquiring the current of the power supply main line when the temperature data of the power supply main line reaches a preset highest temperature, and judging that the power supply main line is in an overload state, a suspected aging state or an aging state according to the current value of the power supply main line.
Preferably, in the line aging monitoring step, the line aging monitoring unit obtains the current of the power supply main line and judges that the current of the power supply main line is greater than a preset maximum temperature at an interval of 3s delay time until the temperature of the power supply main line is judged to be greater than the preset maximum temperature twice: if the current of the power supply main line is in a preset working current range and is less than half of the rated current, marking the power supply main line as a line aging state; if the current of the power supply main line is not in a preset working current range, marking the power supply main line in an overload state; and if the current of the power supply main line is not less than half of the rated current, marking the power supply main line as a suspected aging state.
Preferably, the system includes a communication unit, and the state information of the power supply main line judged by the line aging monitoring unit is uploaded to the server through the communication unit, so as to be acquired by the user terminal.
The line aging monitoring system of the electric bicycle disclosed by the invention realizes the line aging monitoring function, and can judge whether the power supply main line is in an overload state, a suspected aging state or an aging state according to the current value of the power supply main line when the power supply main line reaches a certain temperature, and a user can timely process the states according to the overload state, the suspected aging state or the aging state, so that potential safety hazards caused by line aging are prevented, and the safety and the reliability of the electric bicycle are better improved.
Drawings
FIG. 1 is a flow chart of the circuit aging monitoring steps of the present invention;
FIG. 2 is a block diagram of the components of a battery management system in accordance with a preferred embodiment of the present invention;
FIG. 3 is a flow chart of the step of over discharge monitoring in a preferred embodiment of the present invention;
FIG. 4 is a flow chart of the steps of the charge overcharge prevention control in the preferred embodiment of the present invention;
FIG. 5 is a flow chart of the charger match detection steps in a preferred embodiment of the present invention;
FIG. 6 is a flow chart of the internal resistance detection steps in the preferred embodiment of the present invention;
fig. 7 is a flowchart of the automatic switching step of the communication mode in the preferred embodiment of the present invention.
Detailed Description
The invention is described in more detail below with reference to the figures and examples.
Example one
The present embodiment provides a line aging monitoring system for an electric bicycle, please refer to fig. 1 and fig. 2, the electric bicycle includes a battery 1 and a power supply main line 2, the system includes:
the temperature probe 4 is installed on the power supply main line 2 and used for acquiring temperature data of the power supply main line 2;
the line aging monitoring unit 10 is configured to acquire temperature data of the power supply main line 2, acquire a current of the power supply main line 2 when the temperature data of the power supply main line 2 reaches a preset maximum temperature, and judge that the power supply main line 2 is in an overload state, a suspected aging state, or an aging state according to a current value of the power supply main line 2.
Above-mentioned electric bicycle circuit aging monitoring system, it has realized the circuit aging monitoring function to can judge according to the current value size of power supply thread 2 when power supply thread 2 reaches the uniform temperature, obtain power supply thread 2 and be in overload state, suspected ageing state or ageing state, the user can in time make according to above-mentioned each state and handle, thereby prevent to produce the potential safety hazard because of the circuit ages, has better improved electric bicycle's security and reliability.
As a preferable mode, the system includes a communication unit 8, and the communication unit 8 is configured to upload the state information of the power supply main line 2, which is obtained by the judgment of the line aging monitoring unit 10, to a server, so that a user terminal can obtain the state information.
In order to better describe the technical scheme of the present invention, the present invention further discloses a line aging monitoring method for an electric bicycle, the electric bicycle comprises a battery 1 and a power supply main line 2, and as shown in fig. 1 and fig. 2, the method is implemented based on a system, the system comprises a temperature probe 4 and a line aging monitoring unit 10, the temperature probe 4 is installed on the power supply main line 2, and the method comprises the line aging monitoring step:
the method comprises the steps of acquiring temperature data of a power supply main line 2 by using a line aging monitoring unit 10, acquiring current of the power supply main line 2 when the temperature data of the power supply main line 2 reaches a preset highest temperature, and judging whether the power supply main line 2 is in an overload state, a suspected aging state or an aging state according to the current value of the power supply main line 2.
Further, in the line aging monitoring step, the line aging monitoring unit 10 obtains the current of the power supply main line 2 and judges that the current is greater than the preset maximum temperature, with 3s delay as an interval, until the temperature of the power supply main line 2 is judged to be greater than the preset maximum temperature twice:
if the current of the power supply main line 2 is in a preset working current range and is less than half of the rated current, marking the power supply main line as a line aging state;
if the current of the power supply main line 2 is not in a preset working current range, marking the current to be in an overload state;
and if the current of the power supply main line 2 is not less than half of the rated current, marking the power supply main line as a suspected aging state.
In the method, one of the functions of delaying for 3 seconds is to remove interference so as to filter out signals possibly having interference in the line, and the other function is to perform temperature average filtering through delaying for 3 seconds so as to obtain more stable and reliable temperature data.
In addition, each vehicle can select a proper cable according to the actual current used during design, for example, a vehicle with the current of 40A can use a 10AWG wire, that is, a wire using 10WAG normally does not generate heat when the current of 40A is passed, if the current of 20A is passed on the 10WAG wire, the wire is required to be replaced in time when the wire is seriously aged, so that the wire generates heat when the current is less than half of the rated current, and the line aging can be judged, and the embodiment comprehensively judges according to the rated current and the heating temperature.
In the method for monitoring the line aging of the electric bicycle, the system comprises a communication unit 8, and the state information of the power supply main line 2 judged by the line aging monitoring unit 10 is uploaded to a server through the communication unit 8 so as to be acquired by a user terminal.
Example two
The present embodiment relates to a battery management system for an electric bicycle, which is shown in fig. 1 to 7, the electric bicycle includes a battery 1 and a power supply main line 2, and the system includes:
the first temperature probe 3 is arranged on the battery 1 and used for acquiring temperature data of the battery 1;
the second temperature probe 4 is installed on the power supply main line 2 and used for acquiring temperature data of the power supply main line 2;
an overdischarge monitoring unit 5, configured to obtain a voltage of the battery 1 when the battery 1 is in a discharge mode, and when the voltage of the battery 1 reaches a preset battery shutdown voltage value, turn off an output of the battery 1, and generate battery voltage low information;
the charging anti-overcharge control unit 6 is used for acquiring the voltage of the battery 1 when the battery 1 is in a charging mode, and stopping charging the battery 1 when the voltage of the battery 1 is greater than a preset battery highest voltage value to generate overcharge information;
the charger matching detection unit 7 is used for acquiring the voltage of the battery 1 after the battery 1 is connected with a charger and generating charger mismatching information when the voltage of the battery 1 exceeds a preset battery charging voltage range;
and the communication unit 8 is used for uploading the temperature data of the battery 1, the temperature data of the power supply main line 2, the battery voltage low information, the overcharge information and the charger mismatch information to a server for a user terminal to obtain.
In the system, the functions of temperature acquisition, over-discharge monitoring, charging over-charge prevention, charger matching detection and the like are realized, and meanwhile, the communication unit 8 is utilized to upload the temperature data of the battery 1, the temperature data of the power supply main line 2, the battery voltage low information, the over-charge information and the charger mismatching information to the server so that a user can master the use state of the electric bicycle in real time.
With regard to the further components of the system, the system comprises:
the internal resistance detection unit 9 is used for acquiring the voltage and the current of the battery 1 when the battery 1 is in a discharge mode, and calculating the internal resistance of the battery according to the voltage and the current of the battery 1;
and the line aging monitoring unit 10, the line aging monitoring unit 10 is configured to acquire temperature data of the power supply main line 2, acquire a current of the power supply main line 2 when the temperature data of the power supply main line 2 reaches a preset maximum temperature, and judge that the power supply main line 2 is in an overload state, a suspected aging state, or an aging state according to a current value of the power supply main line 2.
In order to better describe the technical solution of the present invention, the present invention further discloses a battery management method for an electric bicycle, as shown in fig. 1 to 7, where the electric bicycle includes a battery 1 and a power supply main line 2, the method is implemented based on a system, the system includes a first temperature probe 3, a second temperature probe 4, an overdischarge monitoring unit 5, a charging overcharge prevention control unit 6, a charger matching detection unit 7 and a communication unit 8, the first temperature probe 3 is installed on the battery 1, and the second temperature probe 4 is installed on the power supply main line 2, and the method includes:
a temperature detection step, in which the first temperature probe 3 is used for collecting temperature data of the battery 1, and the second temperature probe 4 is used for collecting temperature data of the power supply main line 2;
an over-discharge monitoring step of acquiring the voltage of the battery 1 by using the over-discharge monitoring unit 5 when the battery 1 is in a discharge mode, and turning off the output of the battery 1 when the voltage of the battery 1 reaches a preset battery turn-off voltage value, so as to generate battery voltage low information;
a charging anti-overcharge control step of acquiring a voltage of the battery 1 by using the charging anti-overcharge control unit 6 when the battery 1 is in a charging mode, and stopping charging the battery 1 when the voltage of the battery 1 is greater than a preset battery maximum voltage value to generate overcharge information;
a charger matching detection step of acquiring the voltage of the battery 1 by using the charger matching detection unit 7 after the battery 1 is connected with a charger, and generating charger mismatching information when the voltage of the battery 1 exceeds a preset battery charging voltage range;
and a data uploading step, wherein the communication unit 8 is utilized to upload the temperature data of the battery 1, the temperature data of the power supply main line 2, the battery voltage low information, the overcharge information and the charger mismatch information to a server for a user terminal to obtain.
As a preferable mode, please refer to fig. 3, in the step of over-discharge monitoring, after the over-discharge monitoring unit 5 obtains the voltage of the battery 1, it is determined whether the voltage of the battery 1 is smaller than a preset battery turn-off voltage value:
if yes, and if the delay time is still less than the battery closing voltage value after 50ms, the output of the battery 1 is cut off, and battery voltage low information is generated;
if not, delaying for 2s, then judging again, and when the voltage of the battery 1 is smaller than the preset battery minimum voltage, turning off the output of the battery 1, and generating battery voltage low information.
In the step of over-discharge monitoring, the time delay of 2s and the time delay of 50mS are used for removing interference and avoiding misjudgment, the time delay of 50mS is used for timely closing output to avoid damaging the battery when the voltage is seriously reduced and is confirmed to be under-voltage, and the time delay of 2s is used for avoiding unnecessary turn-off action as far as possible due to the fact that the voltage of the battery rises back, so that the battery cannot be used.
As a preferable mode, referring to fig. 4, in the charging anti-overcharge control step, after the charging anti-overcharge control unit 6 obtains the voltage of the battery 1, it is determined whether the voltage of the battery 1 is greater than a preset battery maximum voltage value:
if yes, and if the voltage value is still greater than the highest voltage value of the battery after the time delay of 100ms, stopping charging the battery 1, and generating overcharge information;
if not, the interval is 50ms, the battery 1 is stopped to be charged until the charging current is judged to be larger than the preset maximum current twice, and charging overcurrent information is generated, in the judging process, if the charging current does not reach the preset maximum current, the interval is 10 minutes, the battery 1 is stopped to be charged until the charging current is judged to be smaller than 200mA twice and the charging time reaches the preset maximum charging time twice, and charging completion information is generated.
The principle of the charging anti-overcharging control step is as follows: the time delay of 100mS is used for removing interference and avoiding misjudgment, whether the time delay is greater than the highest voltage of the battery is judged between the time delay of 100mS and the turn-off charging, the continuous 100mS is greater than the highest voltage of the battery, the condition that the input charging voltage of the charger is high is considered, the time delay of 50mS is also used for filtering interference and avoiding misoperation, and the time delay of 10 minutes is used for preventing misjudgment, and the other time is used for allowing the charger to charge the battery for a period of time as much as possible. The main purpose is as follows: the charging voltage of the charger is prevented from being larger than the maximum voltage acceptable by the battery, the charging current is prevented from being larger than the maximum charging current of the battery, the charging time is prevented from being overlong, and the phenomenon of overcharging of the battery can be avoided as long as the three conditions are prevented.
Referring to fig. 6, the system includes an internal resistance detection unit 9, and the method includes an internal resistance detection step:
when the battery 1 is in the discharge mode, the internal resistance detection unit 9 acquires the voltage and current of the battery 1 at the time of discharge of 1A and at the time of discharge of 5A, and calculates the internal resistance of the battery based on the acquired voltage and current.
In practical applications, the internal resistance of the battery is calculated by the voltage difference of the device discharge at different currents, for example, the port voltage of the battery is 60V when discharging at 1A, and 58V when discharging at 10A, and the internal resistance is 0.222R when R is (60V-58V)/(10A-1A).
Referring to fig. 7, the present embodiment further includes a communication mode automatic switching step: and connecting the user terminal with the server, judging whether the user terminal equipment is networked, logging in the server through the network if the user terminal equipment is networked, and starting the Bluetooth by the user terminal if the user terminal equipment is not networked, and logging in the server through the Bluetooth mode. The automatic communication mode switching step can realize that the system automatically switches to the Bluetooth communication mode when no 2G network communication exists.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents or improvements made within the technical scope of the present invention should be included in the scope of the present invention.
Claims (5)
1. An electric bicycle line aging monitoring system, electric bicycle is including battery (1) and power supply thread (2), characterized in that, the system including:
the temperature probe (4) is arranged on the power supply main line (2) and is used for acquiring temperature data of the power supply main line (2);
the line aging monitoring unit (10) is used for acquiring temperature data of the power supply main line (2), acquiring current of the power supply main line (2) when the temperature data of the power supply main line (2) reaches a preset highest temperature, and judging whether the power supply main line (2) is in an overload state, a suspected aging state or an aging state according to the current value of the power supply main line (2).
2. The electric bicycle line aging monitoring system according to claim 1, comprising a communication unit (8), wherein the communication unit (8) is configured to upload the state information of the power supply main line (2) judged by the line aging monitoring unit (10) to a server for a user terminal to obtain.
3. A method for monitoring the line aging of an electric bicycle, wherein the electric bicycle comprises a battery (1) and a power supply main line (2), and the method is implemented based on a system, wherein the system comprises a temperature probe (4) and a line aging monitoring unit (10), the temperature probe (4) is installed on the power supply main line (2), and the method comprises the following steps:
the method comprises the steps of acquiring temperature data of a power supply main line (2) by using a line aging monitoring unit (10), acquiring current of the power supply main line (2) when the temperature data of the power supply main line (2) reaches a preset highest temperature, and judging whether the power supply main line (2) is in an overload state, a suspected aging state or an aging state according to the current value of the power supply main line (2).
4. The electric bicycle line aging monitoring method according to claim 3, wherein in the line aging monitoring step, the line aging monitoring unit (10) obtains the current of the power supply main line (2) and judges that the current is greater than a preset maximum temperature at an interval of 3s delay time until the temperature of the power supply main line (2) is judged twice:
if the current of the power supply main line (2) is in a preset working current range and is less than half of the rated current, marking the power supply main line as a line aging state;
if the current of the power supply main line (2) is not in a preset working current range, marking the current to be in an overload state;
and if the current of the power supply main line (2) is not less than half of the rated current, marking the power supply main line as a suspected aging state.
5. The method for monitoring the line aging of the electric bicycle according to claim 4, wherein the system comprises a communication unit (8), and the state information of the power supply main line (2) judged by the line aging monitoring unit (10) is uploaded to a server through the communication unit (8) for a user terminal to obtain.
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| CN201910163270.7A CN111665402A (en) | 2019-03-05 | 2019-03-05 | System and method for monitoring line aging of electric bicycle |
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| CN201910163270.7A CN111665402A (en) | 2019-03-05 | 2019-03-05 | System and method for monitoring line aging of electric bicycle |
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Application publication date: 20200915 |