CN113533968A - Electric quantity metering system of lithium battery electric moped - Google Patents
Electric quantity metering system of lithium battery electric moped Download PDFInfo
- Publication number
- CN113533968A CN113533968A CN202010293364.9A CN202010293364A CN113533968A CN 113533968 A CN113533968 A CN 113533968A CN 202010293364 A CN202010293364 A CN 202010293364A CN 113533968 A CN113533968 A CN 113533968A
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- China
- Prior art keywords
- unit
- lithium battery
- battery pack
- charging
- electric
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Links
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 title claims abstract description 56
- 229910052744 lithium Inorganic materials 0.000 title claims abstract description 56
- 238000004891 communication Methods 0.000 claims abstract description 37
- 238000007599 discharging Methods 0.000 claims abstract description 31
- 238000001514 detection method Methods 0.000 claims abstract description 17
- 230000005611 electricity Effects 0.000 claims abstract description 11
- 238000000034 method Methods 0.000 claims description 4
- 238000005070 sampling Methods 0.000 description 8
- 238000006243 chemical reaction Methods 0.000 description 3
- 238000005259 measurement Methods 0.000 description 3
- QVFWZNCVPCJQOP-UHFFFAOYSA-N chloralodol Chemical compound CC(O)(C)CC(C)OC(O)C(Cl)(Cl)Cl QVFWZNCVPCJQOP-UHFFFAOYSA-N 0.000 description 2
- 239000000446 fuel Substances 0.000 description 2
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- HPDFFVBPXCTEDN-UHFFFAOYSA-N copper manganese Chemical compound [Mn].[Cu] HPDFFVBPXCTEDN-UHFFFAOYSA-N 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- 229910001416 lithium ion Inorganic materials 0.000 description 1
Images
Classifications
-
- 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
- G01R31/36—Arrangements for testing, measuring or monitoring the electrical condition of accumulators or electric batteries, e.g. capacity or state of charge [SoC]
- G01R31/378—Arrangements for testing, measuring or monitoring the electrical condition of accumulators or electric batteries, e.g. capacity or state of charge [SoC] specially adapted for the type of battery or accumulator
-
- 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
- G01R31/36—Arrangements for testing, measuring or monitoring the electrical condition of accumulators or electric batteries, e.g. capacity or state of charge [SoC]
- G01R31/371—Arrangements for testing, measuring or monitoring the electrical condition of accumulators or electric batteries, e.g. capacity or state of charge [SoC] with remote indication, e.g. on external chargers
-
- 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
- G01R31/36—Arrangements for testing, measuring or monitoring the electrical condition of accumulators or electric batteries, e.g. capacity or state of charge [SoC]
- G01R31/382—Arrangements for monitoring battery or accumulator variables, e.g. SoC
- G01R31/3842—Arrangements for monitoring battery or accumulator variables, e.g. SoC combining voltage and current measurements
-
- 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
- G01R31/36—Arrangements for testing, measuring or monitoring the electrical condition of accumulators or electric batteries, e.g. capacity or state of charge [SoC]
- G01R31/396—Acquisition or processing of data for testing or for monitoring individual cells or groups of cells within a battery
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
- Secondary Cells (AREA)
Abstract
The invention discloses an electric quantity metering system of a lithium battery electric moped, which comprises an electric quantity meter respectively connected between a lithium battery pack and charging and discharging equipment, wherein the electric quantity meter comprises: a communication unit; a power supply and voltage detection unit; a current collection unit; a controller unit; a storage unit; a display unit; a key unit. The invention collects the current data between the lithium battery pack and the charging and discharging device through the power supply and voltage detection unit and the current collection unit, obtains the net charge number by continuously integrating the total current flowing in and out through the controller unit, is more accurate to measure as the residual capacity of the lithium battery pack through the net charge number compared with the existing measuring system, and self-learns the electric quantity and the corresponding voltage data through charging and discharging, thereby ensuring the reliability and the accuracy of the capacity of the electricity meter.
Description
Technical Field
The invention relates to the technical field of lithium battery metering, in particular to an electric quantity metering system of a lithium battery electric moped.
Background
Under the current environment of energy saving and environmental protection, the industry of the electric moped is developed vigorously, the electric moped uses a large number of lithium ion battery packs, the driving mileage of the electric moped is determined by the electric quantity of the battery packs, and the condition of feeding halfway can be reduced by accurately measuring the electric quantity of the battery packs.
At present, the main method of the electric moped is to obtain the residual capacity by detecting the voltage at two ends of a battery pack and estimate the residual driving mileage through the residual capacity, which cannot achieve enough precision in practical application, only provides a rough reference value, possibly remains 50% of electric quantity, and is dead after driving for several kilometers, thus causing great inconvenience to users.
Disclosure of Invention
The invention aims to solve the problem that in the prior art, the reference value of electric mileage is not accurate enough due to low battery pack measurement accuracy, and provides an electric quantity metering system of a lithium battery electric moped.
In order to achieve the purpose, the invention adopts the following technical scheme:
the utility model provides a lithium cell electric bicycle electricity quantity metering system, is including connecting the coulometer between lithium cell group and charging and discharging equipment respectively, the coulometer includes:
the communication unit is used for transmitting the data signals to each data demand point of the moped;
the power supply and voltage detection unit is used for providing power for the electricity meter and detecting the port voltage of the lithium battery pack;
the current acquisition unit is used for detecting the current between the charging and discharging equipment and the lithium battery pack;
the controller unit is used for processing and analyzing the detection data of the power supply and voltage detection unit and the current acquisition unit and transmitting data signals through the communication unit;
the storage unit is used for storing the data processed and analyzed by the controller unit;
the display unit is used for displaying the data processed and analyzed by the controller unit;
the key unit is used for controlling the controller unit to process and analyze data and controlling the display information of the display unit;
the storage unit can adopt EEPROM or ferroelectric storage or internal storage;
the display unit can be one of an LED lamp, an LED screen or an LCD screen;
the key unit can be one of a touch key or a dial switch.
Preferably, the power supply and voltage detection unit is connected in parallel to the lithium battery pack.
Preferably, the lithium battery pack is electrically connected with the charging and discharging equipment, and the current collecting unit is electrically connected in series between the lithium battery pack and the charging and discharging equipment;
the current acquisition unit uses resistance sampling or manganese copper wire sampling or current sensor sampling;
the ammeter carries out the current sampling through the charge-discharge of current acquisition unit between to charge-discharge equipment and the lithium cell group, and the total current that current was advanced, was flowed out the lithium cell group is gathered to the current acquisition unit and is inputed and carry out the integral operation in the controller unit that lasts to the net charge number that obtains the integral is as residual capacity, promptly:
that is, the battery capacity in Ah (ampere-hour) is obtained, I0If positive, the electric quantity Q is increased progressively; during discharge I0And when the electric quantity Q is negative, the controller unit reads the current, obtains real charging and discharging current and electric quantity value through conversion, sends the conversion result to the using equipment through the communication module, and can be used for displaying the actual battery capacity through the display unit to increase the metering precision of the system to the lithium battery pack.
Preferably, the communication unit includes wired communication and wireless communication;
wired communication includes RS232, RS485, ModBus and CAN bus, and wireless communication includes 2.4G wireless communication, infrared wireless communication, bluetooth wireless communication, WIFI wireless communication, 433M wireless communication, NB-IoT wireless communication and Lora wireless communication.
The invention has the following beneficial effects:
gather the voltage between lithium cell group and the charging and discharging equipment through power supply and voltage acquisition unit, gather the electric current between lithium cell group and the charging and discharging equipment through the electric current acquisition unit, carry out the integral calculation and reach the net charge number to electric power data through the controller unit, it is more accurate through port voltage measurement as current measurement system of residual capacity through the net charge number.
In summary, the power supply and voltage detection unit and the current collection unit are used for collecting power data between the lithium battery pack and the charging and discharging device during charging and discharging, the controller unit is used for continuously integrating and calculating total current flowing in and out to obtain the net charge number, and the net charge number is used as the residual capacity of the lithium battery pack, so that the metering is more accurate than that of the existing metering system.
Drawings
Fig. 1 is a system block diagram of an electric quantity metering system of a lithium battery electric bicycle provided by the invention.
In the figure: 1 electricity meter, 11 controller units, 12 power supply and voltage detection units, 13 storage units, 14 display units, 15 key units, 16 communication units, 17 current acquisition units, 2 lithium battery packs and 3 charging and discharging devices.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments.
Referring to fig. 1, an electric quantity metering system of lithium battery electric bicycle includes an electricity meter 1 respectively connected between a lithium battery pack 2 and a charging and discharging device 3, and the electricity meter 1 includes:
the communication unit 16 is used for transmitting the data signals to each data demand point of the moped;
a power supply and voltage detection unit 12 for detecting a port voltage of the lithium battery pack 2;
the current acquisition unit 17 is used for detecting the current between the charging and discharging equipment 3 and the lithium battery pack 2;
the controller unit 11 is used for processing and analyzing the detection data of the power supply and voltage detection unit 12 and the current acquisition unit 17 and transmitting data signals through the communication unit 16;
a storage unit 13 for storing data processed and analyzed by the controller unit 11;
a display unit 14 for displaying the data processed and analyzed by the controller unit 11;
a key unit 15 for controlling the controller unit 11 to process, analyze data, and control display information of the display unit 14;
the memory unit 13 can adopt EEPROM or ferroelectric memory or internal memory;
the display unit 14 may be one of an LED lamp or an LED screen or an LCD screen;
the key unit 15 may be one of a touch key, or a dial switch.
The power supply and voltage detection unit 12 is connected in parallel to the lithium battery pack 2.
The lithium battery pack 2 is electrically connected with the charging and discharging equipment 3, and the current collecting unit 17 is electrically connected in series between the lithium battery pack 2 and the charging and discharging equipment 3;
the current acquisition unit 17 uses resistance sampling or current sensor sampling;
the ammeter 1 carries out current sampling through the charge-discharge of current acquisition unit 17 between to charge-discharge equipment 3 and the lithium cell group 2, and current acquisition unit 17 gathers the total current that flows into, flows out lithium cell group 2 and carries out the integral operation in inputing controller unit 11 continuously to the net charge number that obtains the integral is as residual capacity, promptly:
that is, the battery capacity in Ah (ampere-hour) is obtained, I0If positive, the electric quantity Q is increased progressively; during discharge I0If the battery capacity Q is negative, the controller unit 11 reads the current, converts the current to obtain a real charging and discharging current and a real battery capacity value, and sends the conversion result to the display unit 14 through the communication module 16 to display the actual battery capacity, so as to increase the metering accuracy of the system to the lithium battery pack 2.
The communication unit 16 includes wired communication and wireless communication;
wired communication includes RS232, RS485, ModBus and CAN bus, and wireless communication includes 2.4G wireless communication, infrared wireless communication, bluetooth wireless communication, WIFI wireless communication, 433M wireless communication, NB-IoT wireless communication and Lora wireless communication.
When the lithium battery pack is used, the lithium battery pack has two external interfaces, one is charged and discharged at the same interface, and the two wires P + and P-of the lithium battery pack are connected; the other is charge and discharge split, and the lithium battery pack 2 comprises three lines P +, P-and C-;
charging and discharging the lithium battery pack 2: the power supply and voltage detection unit 12 is connected with the P + and P-ports of the P + and P-ports, the P + ', P- ' on the fuel gauge 1 are connected with the charging and discharging equipment 3, the current sampling unit 17 on the fuel gauge 1 is arranged on the P-line of the lithium battery pack 2, and the P + and P + ' are connected together;
during charging, the P + at the 1 end of the electricity meter is connected with the anode of the charging and discharging equipment 3, the P-at the 1 end of the electricity meter is connected with the cathode of the charging and discharging equipment 3 for charging, current flows from the anode of the charging and discharging equipment 3 to the P + of the lithium battery pack 2 and then flows through the P-of the lithium battery pack 2, then flows through the current acquisition unit 17 to the cathode of the charging and discharging equipment 3 to form a loop, the current acquisition unit 17 samples the current, the obtained value is transmitted to the controller unit 11, the controller unit 11 continuously performs integration processing on the obtained current to obtain increased electric quantity, when the lithium battery pack 2 is fully charged, the charging protection action is protected, and the sum of the charged electric quantity and the residual electric quantity before charging is the new total electric quantity.
When discharging, the P + ', P-' are connected with the charging and discharging equipment 3, electric quantity flows out of the lithium battery pack 2 when the charging and discharging equipment 3 is in use, the current collecting unit 17 samples current, obtained numerical values are transmitted to the controller unit 11, the current flow direction is opposite to the charging current flow direction, the used electric quantity is subtracted from the charged new total electric quantity, residual electric quantity is calculated, and after the discharging protection action of the lithium battery pack 2, the electric quantity of the electricity meter 1 returns to zero.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.
Claims (4)
1. The utility model provides a lithium cell electric bicycle electricity quantity metering system, includes electric connection ammeter (1) between lithium cell group (2) and charge-discharge equipment (3) respectively, its characterized in that, ammeter (1) includes:
the communication unit (16) is used for transmitting data signals such as electric quantity and the like to each data demand point of the moped;
the power supply and voltage detection unit (12) is used for providing power for the whole electricity meter control system and detecting the port voltage of the lithium battery pack (2);
the current acquisition unit (17) is used for detecting the current between the charging and discharging equipment (3) and the lithium battery pack (2);
the controller unit (11) is used for processing and analyzing the detection data of the power supply and voltage detection unit (12) and the current acquisition unit (17), calculating through the control unit, displaying through the display unit (14), and transmitting a data signal through the communication unit (16);
a storage unit (13) for storing data processed and analyzed by the controller unit (11);
a display unit (14) for displaying the data processed and analyzed by the controller unit (11);
a key unit (15) for controlling the controller unit (11) to process, analyze data and control display information of the display unit (14).
2. The electric bicycle electric quantity metering system of lithium battery electric boosted vehicle of claim 1, characterized in that the power supply and voltage detection unit (12) is connected in parallel to the lithium battery pack (2).
3. The electric bicycle electric quantity metering system of lithium battery electric boosted vehicle as claimed in claim 1, characterized in that the lithium battery pack (2) is electrically connected with the charging and discharging device (3), and the current collecting unit (17) is electrically connected in series between the lithium battery pack (2) and the charging and discharging device (3).
4. The electric bicycle electric quantity metering system of lithium battery as claimed in claim 1, characterized in that, the communication unit (16) comprises wired communication and wireless communication.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010293364.9A CN113533968A (en) | 2020-04-15 | 2020-04-15 | Electric quantity metering system of lithium battery electric moped |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010293364.9A CN113533968A (en) | 2020-04-15 | 2020-04-15 | Electric quantity metering system of lithium battery electric moped |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN113533968A true CN113533968A (en) | 2021-10-22 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010293364.9A Pending CN113533968A (en) | 2020-04-15 | 2020-04-15 | Electric quantity metering system of lithium battery electric moped |
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| Country | Link |
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| CN (1) | CN113533968A (en) |
Citations (7)
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|---|---|---|---|---|
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| CN102809729A (en) * | 2012-05-11 | 2012-12-05 | 武汉中原电子集团有限公司 | Electricity metering device for power battery |
| CN204967350U (en) * | 2015-09-11 | 2016-01-13 | 深圳市家信信息科技开发有限公司 | This system's driven bicycle of energy -concerving and environment -protective lithium battery system and adoption |
| CN106696735A (en) * | 2016-12-19 | 2017-05-24 | 重庆汉岳科技发展有限公司 | Intelligent monitoring system based on vehicle-mounted lithium battery pack |
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| CN209675954U (en) * | 2018-09-27 | 2019-11-22 | 广东玛西尔电动科技有限公司 | A kind of lithium battery management system for tour bus |
-
2020
- 2020-04-15 CN CN202010293364.9A patent/CN113533968A/en active Pending
Patent Citations (7)
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|---|---|---|---|---|
| US20060158155A1 (en) * | 2005-01-14 | 2006-07-20 | Shigeto Tamezane | Battery remaining capacity detection method and power supply apparatus |
| CN102809729A (en) * | 2012-05-11 | 2012-12-05 | 武汉中原电子集团有限公司 | Electricity metering device for power battery |
| CN204967350U (en) * | 2015-09-11 | 2016-01-13 | 深圳市家信信息科技开发有限公司 | This system's driven bicycle of energy -concerving and environment -protective lithium battery system and adoption |
| CN106696735A (en) * | 2016-12-19 | 2017-05-24 | 重庆汉岳科技发展有限公司 | Intelligent monitoring system based on vehicle-mounted lithium battery pack |
| CN107856559A (en) * | 2017-10-24 | 2018-03-30 | 西北工业大学 | A kind of power battery management system of electric automobile |
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