CN112886682A - Battery protection system of electric bicycle - Google Patents
Battery protection system of electric bicycleDownload PDFInfo
- Publication number
- CN112886682A CN112886682ACN202110317841.5ACN202110317841ACN112886682ACN 112886682 ACN112886682 ACN 112886682ACN 202110317841 ACN202110317841 ACN 202110317841ACN 112886682 ACN112886682 ACN 112886682A
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- Prior art keywords
- battery
- battery pack
- charging
- mos
- current
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- 238000007599dischargingMethods0.000claimsabstractdescription24
- 238000005070samplingMethods0.000claimsabstractdescription23
- 238000000034methodMethods0.000claimsabstractdescription19
- 239000000178monomerSubstances0.000claimsabstractdescription8
- 230000005669field effectEffects0.000claimsabstractdescription4
- 230000002159abnormal effectEffects0.000description4
- 238000004891communicationMethods0.000description2
- 238000010586diagramMethods0.000description2
- 238000002844meltingMethods0.000description2
- 230000008018meltingEffects0.000description2
- 238000012544monitoring processMethods0.000description2
- 230000005856abnormalityEffects0.000description1
- 230000009286beneficial effectEffects0.000description1
- 238000013461designMethods0.000description1
- 238000011161developmentMethods0.000description1
- 238000004880explosionMethods0.000description1
- 230000008707rearrangementEffects0.000description1
- 238000004088simulationMethods0.000description1
- 238000006467substitution reactionMethods0.000description1
- 230000001960triggered effectEffects0.000description1
Images
Classifications
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/007—Regulation of charging or discharging current or voltage
- H02J7/007188—Regulation of charging or discharging current or voltage the charge cycle being controlled or terminated in response to non-electric parameters
- H02J7/007192—Regulation of charging or discharging current or voltage the charge cycle being controlled or terminated in response to non-electric parameters in response to temperature
- H02J7/007194—Regulation of charging or discharging current or voltage the charge cycle being controlled or terminated in response to non-electric parameters in response to temperature of the battery
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L58/00—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles
- B60L58/10—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L58/00—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles
- B60L58/10—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries
- B60L58/24—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries for controlling the temperature of batteries
- B60L58/25—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries for controlling the temperature of batteries by controlling the electric load
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/0029—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with safety or protection devices or circuits
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/0029—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with safety or protection devices or circuits
- H02J7/00304—Overcurrent protection
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/007—Regulation of charging or discharging current or voltage
- H02J7/00712—Regulation of charging or discharging current or voltage the cycle being controlled or terminated in response to electric parameters
- H02J7/00714—Regulation of charging or discharging current or voltage the cycle being controlled or terminated in response to electric parameters in response to battery charging or discharging current
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/70—Energy storage systems for electromobility, e.g. batteries
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- Sustainable Development (AREA)
- Sustainable Energy (AREA)
- Transportation (AREA)
- Mechanical Engineering (AREA)
- Protection Of Static Devices (AREA)
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
Abstract
Description
Technical Field
The embodiment of the invention relates to the technical field of battery protection, in particular to a battery protection system of an electric moped.
Background
With the steady development of the electric bicycle industry in China, the quantity of electric bicycles for assisting is steadily increasing, so the safety problem becomes important. The most easily-caused safety accident part of the electric moped is the battery, the accidents such as battery leakage, fire, explosion and the like are frequently seen nowadays, and particularly, the battery is heated, expanded and even exploded due to overcharge, so that the real-time monitoring of the battery state and the effective control and management of the battery charging and discharging are very important.
At present, a battery of an electric bicycle is usually configured with a hardware protection board or a software protection board to monitor a state of the battery, and when it is monitored that the battery fails, a loop is automatically cut off to protect the battery.
However, the protection board only depends on the on-off of the MOS transistor to control the power circuit for the charge and discharge control, or adds a current limiting fuse to protect the battery. The protection mode is single, and no matter the fuse is fast melting or full melting, the possibility of fault jump is high, so that the product cannot be used, and the charging and discharging cannot be effectively controlled.
Disclosure of Invention
The invention provides a battery protection system of an electric moped, which is used for realizing control and multiple protection of the charging and discharging process of a battery of the electric moped and ensuring that the charging and discharging process of the battery is safer.
The technical scheme of the invention is as follows:
the embodiment of the invention provides a battery protection system of an electric moped, which comprises:
the device comprises an analog front-end chip, a current sampling resistor, a battery pack, a discharge field effect transistor (MOS), a charging MOS, a secondary protection chip and a three-terminal fuse;
the current sampling resistor is connected with the battery pack and used for collecting the current of a power loop of the battery pack;
the analog front-end chip is connected with the current sampling resistor and the battery pack and is used for acquiring the power loop current of the battery pack through the current sampling resistor and acquiring the single voltage value and the battery temperature information of the battery in the battery pack;
the analog front-end chip is also connected with the discharging MOS and the charging MOS and is used for controlling the on-off of the discharging MOS and the charging MOS according to the power loop current, the single voltage value of the battery and the battery temperature information;
the secondary protection chip is connected with the battery pack and the three-terminal fuse, and the three-terminal fuse is connected with the battery pack;
the secondary protection chip is used for acquiring the monomer voltage information and the sampling information of the battery pack and controlling the fusing of the three-terminal fuse according to the acquired monomer voltage information and the sampling information of the battery pack.
Optionally, the system further includes:
and the controller is connected with the analog front-end chip and the three-terminal fuse and is used for acquiring the power loop current of the battery pack, the single voltage value of the battery in the battery pack and the battery temperature information from the analog front-end chip and controlling the fusing of the three-terminal fuse. The controller is set to be a layer of protection mechanism in the charging and discharging process of the battery, and the controller can control the fusing of the three-terminal fuse when the secondary protection chip fails, so that the protection strength in the operation process of the battery is further enhanced.
Optionally, the controller is a microcontroller MCU.
Optionally, the controller is in communication connection with the analog front-end chip.
Optionally, the system further includes: and the current-limiting fuse is connected with the charging positive port and is used for fusing when the charging current is greater than the rated charging current threshold of the fuse in the charging process of the battery. The battery is further protected by a current limiting fuse.
The invention has the beneficial effects that:
the invention monitors the monomer voltage, the power loop current and the battery temperature information of the battery by simulating the front-end chip, and can protect the power loop by controlling the on-off of the MOS tube; in addition, the battery protection system provided by the embodiment of the invention further comprises a secondary protection chip and a three-terminal fuse, and when the secondary protection chip detects that the single voltage value of the battery is overvoltage or sampling disconnection, the three-terminal fuse can be triggered to be fused to protect the battery pack. The embodiment of the invention realizes the control and multiple protection of the charging and discharging process of the battery of the electric moped, so that the charging and discharging process of the battery is safer.
Drawings
Fig. 1 is a schematic structural diagram of a battery protection system of an electric bicycle according to an embodiment of the present invention.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting of the invention. It should be further noted that, for the convenience of description, only some of the structures related to the present invention are shown in the drawings, not all of the structures.
Examples
Fig. 1 is a schematic structural diagram of a battery protection system of an electric bicycle according to an embodiment of the present invention. Referring to fig. 1, the system includes: the device comprises an analog front-end chip 1, acurrent sampling resistor 2, abattery pack 3, a discharge fieldeffect transistor MOS 4, a chargingMOS 5, asecondary protection chip 6 and a three-terminal fuse 7;
thecurrent sampling resistor 2 is connected with thebattery pack 3 and used for collecting power loop current of thebattery pack 3;
the analog front-end chip 1 is connected with thecurrent sampling resistor 2 and thebattery pack 3, and is used for acquiring the power loop current of thebattery pack 3 through thecurrent sampling resistor 2 and acquiring the single voltage value and the battery temperature information of the battery in thebattery pack 3;
the analog front-end chip 1 is also connected with thedischarging MOS 4 and the chargingMOS 5 and is used for controlling the on-off of thedischarging MOS 4 and the chargingMOS 5 according to the power loop current, the single voltage value of the battery and the battery temperature information;
thesecondary protection chip 6 is connected with thebattery pack 3 and the three-terminal fuse 7, and the three-terminal fuse 7 is connected with thebattery pack 3; thesecondary protection chip 6 is used for acquiring the monomer voltage information and the sampling information of thebattery pack 3, and controlling the fusing of the three-terminal fuse 7 according to the acquired monomer voltage information and the sampling information of thebattery pack 3.
Specifically, when the analog front-end chip 1 detects the abnormal information of the battery, the dischargingMOS 4 or the chargingMOS 5 is cut off in time to protect the battery during the charging or discharging process. The battery abnormality information may be that the power loop current exceeds a limited current value, the cell voltage of the battery exceeds a rated voltage value, or the temperature of the battery exceeds a temperature threshold, or may be an abnormal condition of other battery operating parameters acquired by the analog front-end chip 1. In this embodiment, a plurality of operation parameters in the battery charging and discharging process can be monitored through the analog front-end chip 1, and when one or more operation parameters are abnormal, the MOS can be controlled to be turned off in time to perform omnibearing protection on the battery. In addition, the analog front-end chip 1 in this embodiment can sample the magnitude of the power loop current, and then can set the charge-discharge protection threshold according to the actual use requirement, so that the protection system can adapt to match more power platforms, and has wide applicability.
Furthermore, the embodiment of the invention is also provided with asecondary protection chip 6 and a three-terminal fuse 7 to realize multiple protection in the charging and discharging process of the battery. Specifically, when thesecondary protection chip 6 detects that the cell voltage value of the battery is overvoltage or sampling disconnection, thesecondary protection chip 6 can actively cut off the three-terminal fuse 7, and the setting mode and the analog front-end chip 1 jointly provide protection for the battery.
Further, the system further comprises: and thecontroller 8 is connected with the analog front-end chip 1 and the three-terminal fuse 7, and is used for acquiring the power loop current of thebattery pack 3, the single voltage value of the battery in thebattery pack 3 and the battery temperature information from the analog front-end chip 1 and controlling the fusing of the three-terminal fuse 7.
Wherein, above-mentionedcontroller 8 can be microcontroller 8(Micro Control Unit), MCU), andcontroller 8 carries out communication connection with simulationfront end chip 1, can realize the intercommunication between the battery operation data. Specifically, thecontroller 8 obtains battery operation data such as power loop current of thebattery pack 3 of the battery, a cell voltage value of the battery in thebattery pack 3, and battery temperature information from the analog front-end chip 1, and when thecontroller 8 monitors that the current operation data is abnormal, the three-terminal fuse 7 can be fused to protect the circuit. The setting mode adds a layer of protection mechanism for the charging and discharging process of the battery, and thecontroller 8 can control the fusing of the three-terminal fuse 7 when thesecondary protection chip 6 breaks down, so that the protection strength in the operation process of the battery is further enhanced.
Further, the system further comprises a current-limitingfuse 9, wherein the current-limitingfuse 9 is connected with the chargingpositive electrode port 10 and is used for fusing when the charging current is larger than the rated charging current threshold of the fuse in the battery charging process. The protection degree in the battery operation process is further strengthened to this setting mode.
Optionally, the system further includes adischarging anode port 11 and a charging/dischargingcathode port 12 connected to the chargingMOS 5.
The battery protection system of electric bicycle that this embodiment provided can realize carrying out comprehensive monitoring to battery operation data, can realize the multiple protection to battery charge-discharge process through different software and hardware setting modes, and the mode of this design protection battery is diversified, and the method is intelligent, and the range of applicability is wide.
It is to be noted that the foregoing is only illustrative of the preferred embodiments of the present invention and the technical principles employed. It will be understood by those skilled in the art that the present invention is not limited to the particular embodiments described herein, but is capable of various obvious changes, rearrangements and substitutions as will now become apparent to those skilled in the art without departing from the scope of the invention. Therefore, although the present invention has been described in greater detail by the above embodiments, the present invention is not limited to the above embodiments, and may include other equivalent embodiments without departing from the spirit of the present invention, and the scope of the present invention is determined by the scope of the appended claims.
Claims (5)
1. A battery protection system for an electric power-assisted vehicle, the system comprising:
the device comprises an analog front-end chip, a current sampling resistor, a battery pack, a discharge field effect transistor (MOS), a charging MOS, a secondary protection chip and a three-terminal fuse;
the current sampling resistor is connected with the battery pack and used for collecting the current of a power loop of the battery pack;
the analog front-end chip is connected with the current sampling resistor and the battery pack and is used for acquiring the power loop current of the battery pack through the current sampling resistor and acquiring the single voltage value and the battery temperature information of the battery in the battery pack;
the analog front-end chip is also connected with the discharging MOS and the charging MOS and is used for controlling the on-off of the discharging MOS and the charging MOS according to the power loop current, the single voltage value of the battery and the battery temperature information;
the secondary protection chip is connected with the battery pack and the three-terminal fuse, and the three-terminal fuse is connected with the battery pack;
the secondary protection chip is used for acquiring the monomer voltage information and the sampling information of the battery pack and controlling the fusing of the three-terminal fuse according to the acquired monomer voltage information and the sampling information of the battery pack.
2. The system of claim 1, further comprising:
and the controller is connected with the analog front-end chip and the three-terminal fuse and is used for acquiring the power loop current of the battery pack, the single voltage value of the battery in the battery pack and the battery temperature information from the analog front-end chip and controlling the fusing of the three-terminal fuse.
3. The system of claim 2, wherein the controller is a microcontroller MCU.
4. The system of claim 2, wherein the controller is communicatively coupled to the analog front end chip.
5. The system of claim 1, further comprising:
and the current-limiting fuse is connected with the charging positive port and is used for fusing when the charging current is greater than the rated charging current threshold of the fuse in the charging process of the battery.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110317841.5ACN112886682A (en) | 2021-03-25 | 2021-03-25 | Battery protection system of electric bicycle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110317841.5ACN112886682A (en) | 2021-03-25 | 2021-03-25 | Battery protection system of electric bicycle |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112886682Atrue CN112886682A (en) | 2021-06-01 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110317841.5APendingCN112886682A (en) | 2021-03-25 | 2021-03-25 | Battery protection system of electric bicycle |
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| Country | Link |
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| CN (1) | CN112886682A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN118100378A (en)* | 2024-04-28 | 2024-05-28 | 深圳市泰科动力系统有限公司 | Charging and discharging management circuit applied to BMS |
| CN119142203A (en)* | 2024-11-19 | 2024-12-17 | 杭州久翼智能科技有限公司 | Battery management system and vehicle |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN210680458U (en)* | 2019-10-17 | 2020-06-05 | 无锡凌博电子技术有限公司 | Battery management system with secondary protection function |
| CN214755603U (en)* | 2021-03-25 | 2021-11-16 | 八方电气(苏州)股份有限公司 | Battery protection system of electric bicycle |
- 2021
- 2021-03-25CNCN202110317841.5Apatent/CN112886682A/enactivePending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN210680458U (en)* | 2019-10-17 | 2020-06-05 | 无锡凌博电子技术有限公司 | Battery management system with secondary protection function |
| CN214755603U (en)* | 2021-03-25 | 2021-11-16 | 八方电气(苏州)股份有限公司 | Battery protection system of electric bicycle |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN118100378A (en)* | 2024-04-28 | 2024-05-28 | 深圳市泰科动力系统有限公司 | Charging and discharging management circuit applied to BMS |
| CN119142203A (en)* | 2024-11-19 | 2024-12-17 | 杭州久翼智能科技有限公司 | Battery management system and vehicle |
| CN119142203B (en)* | 2024-11-19 | 2025-03-18 | 杭州久翼智能科技有限公司 | Battery management system and vehicle |
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