CN111661228A - Electric bicycle storage battery management system and method - Google Patents
Electric bicycle storage battery management system and method Download PDFInfo
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- CN111661228A CN111661228A CN201910163378.6A CN201910163378A CN111661228A CN 111661228 A CN111661228 A CN 111661228A CN 201910163378 A CN201910163378 A CN 201910163378A CN 111661228 A CN111661228 A CN 111661228A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
- B62M—RIDER PROPULSION OF WHEELED VEHICLES OR SLEDGES; POWERED PROPULSION OF SLEDGES OR SINGLE-TRACK CYCLES; TRANSMISSIONS SPECIALLY ADAPTED FOR SUCH VEHICLES
- B62M6/00—Rider propulsion of wheeled vehicles with additional source of power, e.g. combustion engine or electric motor
- B62M6/80—Accessories, e.g. power sources; Arrangements thereof
- B62M6/90—Batteries
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
- B62J—CYCLE SADDLES OR SEATS; AUXILIARY DEVICES OR ACCESSORIES SPECIALLY ADAPTED TO CYCLES AND NOT OTHERWISE PROVIDED FOR, e.g. ARTICLE CARRIERS OR CYCLE PROTECTORS
- B62J99/00—Subject matter not provided for in other groups of this subclass
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Abstract
The invention discloses a storage battery management system of an electric bicycle, which comprises a battery and a power supply main line, wherein the system comprises a first temperature probe, a second temperature probe, an over-discharge monitoring unit, a charging anti-over-charge control unit, a charger matching detection unit and a communication unit, so that the functions of temperature acquisition, over-discharge monitoring, charging anti-over-charge, charger matching detection and the like are realized, and meanwhile, the communication unit is utilized to upload the temperature data of the battery, the temperature data of the power supply main line, the battery voltage low information, the over-charge information and the charger mismatching information to a server for a user to master the use state of the electric bicycle in real time. Better meeting the requirements of users and markets.
Description
Technical Field
The invention relates to a battery charging management system, in particular to a storage battery management system and method for an 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 mainly lies in the battery, and the condition that relates to is like battery overcharge, overdischarge, and someone charges for a long time on purpose in the use, thinks that the battery can charge more like this, and someone often forgets to pull out the charger when charging for the battery and leads to charging for a long time, if the charger is good output voltage on the high side, or the charger components and parts age and lead to output voltage on the high side after leading to the battery to charge for a long time like this again the high voltage can damage the battery. Some cheap vehicle batteries have no protection measures, and the batteries are seriously overdischarged until the batteries are dead in the using process, so that the batteries which are frequently overdischarged are easy to damage.
For example, the charger is not matched, many people can buy cheap chargers at a roadside stall at will, the three-component charger mostly adopts cheap components to reduce the cost, the deviation of device parameters is large, some people also intentionally perform virtual marking parameters, the extreme operation heating of many devices is large, the deviation of the devices can be further increased by heating aging acceleration, the battery is easily damaged by using the charger, and some people think that the charger can be used by a lithium battery, the lead-acid charger is often used by the lithium battery, and the improper use of the charger for the lithium battery for charging the lead-acid also can cause the battery to be damaged.
Disclosure of Invention
The invention aims to solve the technical problem of providing a storage battery management system and a storage battery management method for an electric bicycle, which have the functions of temperature acquisition, over-discharge monitoring, charging over-charging prevention, charger matching detection and data uploading, so that the utilization rate of a battery is improved, the service life of the battery is prolonged, and potential safety hazards are reduced.
In order to solve the technical problems, the invention adopts the following technical scheme.
An electric bicycle battery management system, electric bicycle includes battery and power supply mainline, the system includes: the first temperature probe is arranged on the battery and used for acquiring temperature data of the battery; the second temperature probe is arranged on the power supply main line and used for acquiring temperature data of the power supply main line; the over-discharge monitoring unit is used for acquiring the voltage of the battery when the battery is in a discharge mode, and shutting down the output of the battery when the voltage of the battery reaches a preset battery shutdown voltage value to generate battery voltage low information; the charging anti-overcharging control unit is used for acquiring the voltage of the battery when the battery is in a charging mode, and stopping charging the battery when the voltage of the battery is greater than a preset highest voltage value of the battery to generate overcharging information; the charger matching detection unit is used for acquiring the voltage of the battery after the battery is connected with a charger and generating charger mismatching information when the voltage of the battery exceeds a preset battery charging voltage range; and the communication unit is used for uploading the temperature data of the battery, the temperature data of the power supply main line, the battery voltage low information, the overcharge information and the charger mismatch information to a server for a user terminal to obtain.
Preferably, the system comprises: the internal resistance detection unit is used for acquiring the voltage and the current of the battery when the battery is in a discharging mode, and calculating the internal resistance of the battery according to the voltage and the current of the battery.
Preferably, the power supply system comprises a line aging monitoring unit, wherein the line aging monitoring unit is used for acquiring temperature data of the power supply main line, acquiring current of the power supply main line when the temperature data of the power supply main line reaches a preset maximum 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.
A method for managing a storage battery 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 first temperature probe, a second temperature probe, an over-discharge monitoring unit, a charging anti-over-charging control unit, a charger matching detection unit and a communication unit, the first temperature probe is installed on the battery, the second temperature probe is installed on the power supply main line, and the method comprises the following steps: a temperature detection step, namely acquiring temperature data of the battery by using the first temperature probe and acquiring temperature data of the power supply main line by using the second temperature probe; an over-discharge monitoring step of acquiring the voltage of the battery by using the over-discharge monitoring unit when the battery is in a discharge mode, and shutting off the output of the battery when the voltage of the battery reaches a preset battery shutdown voltage value to generate battery voltage low information; a charging anti-overcharge control step of acquiring the voltage of the battery by using the charging anti-overcharge control unit when the battery is in a charging mode, and stopping charging the battery when the voltage of the battery is greater than a preset highest voltage value of the battery to generate overcharge information; a charger matching detection step of acquiring the voltage of the battery by using the charger matching detection unit after the battery is connected with a charger, and generating charger mismatching information when the voltage of the battery exceeds a preset battery charging voltage range; and a data uploading step, wherein the communication unit is utilized to upload the temperature data of the battery, the temperature data of the power supply main line, the battery voltage low information, the overcharge information and the charger mismatch information to a server for a user terminal to obtain.
Preferably, in the step of monitoring the overdischarge, after the overdischarge monitoring unit obtains the voltage of the battery, it is determined whether the voltage of the battery is smaller than a preset battery turn-off voltage value: if so, and if the delay time is still less than the battery closing voltage value after 50ms, the output of the battery 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 is smaller than the preset lowest voltage of the battery, turning off the output of the battery, and generating battery voltage low information.
Preferably, in the step of controlling the charging anti-overcharge, after the charging anti-overcharge control unit obtains the voltage of the battery, it is determined whether the voltage of the battery is greater than a preset highest voltage value of the battery: if so, and if the voltage value is still greater than the highest voltage value of the battery after delaying for 100ms, stopping charging the battery, and generating overcharge information; if not, the interval is 50ms, the battery 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.
Preferably, the system comprises an internal resistance detection unit, and the method comprises the internal resistance detection step: when the battery is in a discharge mode, the internal resistance detection unit acquires the voltage and current of the battery at the time of 1A discharge and at the time of 5A discharge, and calculates the internal resistance of the battery based on the acquired voltage and current.
Preferably, the method further comprises the following communication mode automatic switching steps: 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.
Preferably, the system comprises a line age monitoring unit, the method comprising the line age monitoring step of: 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.
The storage battery management system of the electric bicycle disclosed by the invention has the advantages that the functions of temperature acquisition, over-discharge monitoring, over-charge prevention, charger matching detection and the like are realized, and meanwhile, the communication unit is utilized to upload the temperature data of the battery, the temperature data of the power supply main line, 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.
Drawings
FIG. 1 is a block diagram of an electric bicycle battery management system according to the present invention;
FIG. 2 is a flow chart of an over-discharge monitoring step;
FIG. 3 is a flow chart of the charge overcharge prevention control steps;
FIG. 4 is a flowchart of the charger match detection procedure;
FIG. 5 is a flow chart of an internal resistance detection step;
FIG. 6 is a flow chart of the communication mode automatic switching step;
fig. 7 is a flowchart of the line degradation monitoring step.
Detailed Description
The invention is described in more detail below with reference to the figures and examples.
The invention discloses a battery management system of an electric bicycle, which is shown in a combined figure 1-7, wherein the electric bicycle comprises a battery 1 and a power supply main line 2, and the system comprises:
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. 2, 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. 3, 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 maximum battery 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. 5, 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. 6, 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.
Preferably, the system includes a line degradation monitoring unit 10, and the method includes 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.
According to the embodiment, the line aging monitoring function is realized, when the power supply main line 2 reaches a certain temperature, whether the power supply main line 2 is in an overload state, a suspected aging state or an aging state is judged according to the current value of the power supply main line 2, 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 well improved.
Further, referring to fig. 7, in the line aging monitoring step, the line aging monitoring unit 10 takes 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, obtains the current of the power supply main line 2 and judges:
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.
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 (10)
1. An electric bicycle battery management system, the electric bicycle includes battery (1) and power supply mainline (2), characterized by that, the system includes:
the first temperature probe (3) is arranged on the battery (1) and is used for acquiring temperature data of the battery (1);
the second 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 over-discharge monitoring unit (5) is used for acquiring the voltage of the battery (1) 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 to generate battery voltage low information;
the charging anti-overcharging 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 larger than a preset battery highest voltage value to generate overcharging information;
a charger matching detection unit (7) 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;
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.
2. The battery management system for electric bicycles of claim 1, wherein 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).
3. The battery management system for electric bicycles of claim 1, comprising a line aging monitoring unit (10), wherein the line aging monitoring unit (10) is configured to obtain temperature data of the power supply main line (2), obtain 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 determine 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).
4. A method for managing a storage battery 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 first temperature probe (3), a second temperature probe (4), an over-discharge monitoring unit (5), a charging anti-over-charging 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), the second temperature probe (4) is installed on the power supply main line (2), and the method comprises the following steps:
a temperature detection step, wherein 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 shutting down the output of the battery (1) when the voltage of the battery (1) reaches a preset battery shutdown voltage value to generate battery voltage low information;
a charging anti-overcharging control step of acquiring the voltage of the battery (1) by using the charging anti-overcharging 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 highest voltage value to generate overcharging 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.
5. The battery management method for electric bicycles of claim 4, wherein 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 less 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) to generate battery voltage low information.
6. The electric bicycle battery management method according to claim 4, wherein in the charging anti-overcharge control step, after the charging anti-overcharge control unit (6) acquires 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 larger than the highest voltage value of the battery after the time delay of 100ms, stopping charging the battery (1) to generate overcharge information;
if not, the charging is stopped at an interval of 50ms until the charging current is judged to be larger than the preset maximum current twice, the battery (1) is stopped to be charged, and charging overcurrent information is generated.
7. The battery management method for electric bicycles of claim 4, wherein the system comprises an internal resistance detection unit (9), the method comprising the internal resistance detection step of:
when the battery (1) is in a discharge mode, the internal resistance detection unit (9) acquires the voltage and current of the battery (1) at the time of 1A discharge and at the time of 5A discharge, and calculates the internal resistance of the battery based on the acquired voltage and current.
8. The battery management method for electric bicycles of claim 4, further comprising the step of automatically switching communication modes: 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.
9. The electric bicycle battery management method according to claim 4, characterized in that the system comprises a line degradation monitoring unit (10), the method comprising the line degradation monitoring step of:
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).
10. The battery management method for electric bicycles of claim 9, wherein in the line degradation monitoring step, the line degradation monitoring unit (10) acquires the current of the power supply main line (2) and determines that the current is greater than the preset maximum temperature at an interval of 3s delay time until the temperature of the power supply main line (2) is determined twice to be greater than the preset maximum temperature:
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.
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| CN113895308A (en) * | 2021-10-14 | 2022-01-07 | 国什能源科技(北京)有限公司 | System solution for safely charging lithium battery of electric bicycle |
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Application publication date: 20200915 |