CN113085657A - Multi-battery system for electric vehicle - Google Patents
Multi-battery system for electric vehicle Download PDFInfo
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- CN113085657A CN113085657A CN201911335077.3A CN201911335077A CN113085657A CN 113085657 A CN113085657 A CN 113085657A CN 201911335077 A CN201911335077 A CN 201911335077A CN 113085657 A CN113085657 A CN 113085657A
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- battery
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- identification unit
- predetermined value
- battery system
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- 238000001514 detection method Methods 0.000 claims abstract description 21
- 238000010586 diagram Methods 0.000 description 10
- 238000000034 method Methods 0.000 description 4
- 230000005611 electricity Effects 0.000 description 2
- 238000007599 discharging Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
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Classifications
-
- 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
- B60L58/18—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries of two or more battery modules
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- 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
- H02J7/36—Arrangements using end-cell switching
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- 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
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- Sustainable Development (AREA)
- Sustainable Energy (AREA)
- Transportation (AREA)
- Mechanical Engineering (AREA)
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
- Electric Propulsion And Braking For Vehicles (AREA)
Abstract
The invention discloses a multi-battery system for an electric vehicle, which is suitable for the electric vehicle. Comprises a plurality of batteries, a first connector and a second connector. The battery has a battery connector with a detection unit. The first connector and the second connector are used for electrically connecting the battery connector. The first connector has a first identification unit and the second connector has a second identification unit. When the first identification unit is set to the first predetermined value and the detection unit is electrically connected to the first identification unit, the battery is set as the main battery. When the second identification unit is set to a second predetermined value and the detection unit is electrically connected to the second identification unit, the battery is set as a sub-battery. The multi-battery system sets the battery as the main battery or the auxiliary battery through the judgment of the identification unit on the preset value, does not need to set a switch, is more convenient for a user, and can avoid the damage risk of the circuit.
Description
Technical Field
The present invention relates to a multi-battery system, and more particularly, to a multi-battery system for an electric vehicle.
Background
Various electric vehicles on the market use a plurality of batteries in order to increase a travel distance. When multiple batteries are used, one battery is usually used as a master battery to communicate with the motor controller and manage other slave batteries. The conventional art uses a setting switch (setting switch) to set the battery as the main battery or the sub-battery, but this is inconvenient for the user, and the setting switch (setting switch) is exposed to cause moisture intrusion, thereby causing circuit damage. The general category of electric vehicles includes electric assist bicycles, electric motorcycles, electric wheelchair vehicles, golf carts, and the like.
Disclosure of Invention
In view of the problems in the prior art, the present invention provides a multi-battery system for an electric vehicle to solve the above problems.
The object of the present invention is therefore to provide a multi-battery system for an electric vehicle, comprising:
a plurality of batteries respectively comprising a microcontroller and a battery connector, the battery connector having a detection unit;
the first connector is provided with a first identification unit and is used for electrically connecting the battery connector and the motor controller; and
a second connector having a second identification unit, the second connector being used to electrically connect a battery connector of another battery and the motor controller;
when the first identification unit is set to a first preset value and the detection unit is electrically connected with the first identification unit, the microcontroller of the battery sets the battery as a main battery; when the second identification unit is set to a second predetermined value and the detection unit of the other battery is electrically connected to the second identification unit, the microcontroller of the other battery sets the other battery as a sub-battery.
As an optional technical solution, the detecting unit includes a first pin, and the first identifying unit includes a third pin.
As an optional technical solution, the second identification unit includes a fifth pin, and the fifth pin is electrically connected to the second potential.
As an optional technical solution, the detecting unit includes two pins, the first identifying unit includes two pins, and the two pins of the first identifying unit provide the first predetermined value.
As an optional technical solution, the first predetermined value is a first potential value, and the second predetermined value is a second potential value.
As an optional technical solution, the first predetermined value is a first signal, and the second predetermined value is a second signal.
Alternatively, the microcontroller of the master battery may execute a communication protocol with the motor controller via the first connector and wires.
Alternatively, the primary battery detects its temperature and other operational data as well as the secondary battery and communicates with the motor controller using a communication protocol.
As an alternative solution, the microcontroller of the main battery and the microcontroller of the sub-battery are connected via a line, and execute a communication protocol via the line.
Alternatively, the sub-battery receives the command from the main battery to determine whether to continue supplying power.
Compared with the prior art, the invention provides a multi-battery system for an electric vehicle, which comprises a plurality of batteries, a first connector and a second connector. Each battery includes a battery connector having a detection unit. The first connector has a first identification unit. The second connector has a second identification unit. The first connector and the second connector are used for electrically connecting the battery and the motor controller. When the first identification unit is set to a first predetermined value and the detection unit is electrically connected to the first identification unit, the battery is set as a main battery. When the second identification unit is set to a second predetermined value and the detection unit is electrically connected to the second identification unit, the battery is set as a sub-battery. The multi-battery system sets the battery as the main battery or the auxiliary battery through the judgment of the identification unit on the preset value, and does not need to set a switch, so that a user is more convenient, and the damage risk of the circuit can be avoided.
The invention is described in detail below with reference to the drawings and specific examples, but the invention is not limited thereto.
Drawings
Fig. 1 is a schematic diagram of a multi-battery system for an electric vehicle according to an embodiment of the present invention.
Fig. 2 is another schematic diagram of the multiple battery system of fig. 1.
Fig. 3 is a schematic diagram of a battery connector of the multi-battery system of fig. 1.
Fig. 4A is a schematic diagram of a first connector of the multiple battery system of fig. 1.
Fig. 4B is a schematic diagram of a second connector of the multiple battery system of fig. 1.
Fig. 5 is a flow chart for firmware for the multi-battery system of fig. 1 to determine whether a primary battery or a secondary battery.
Fig. 6 is a schematic view of a multi-battery system for an electric vehicle according to another embodiment of the present invention.
Fig. 7 is a flowchart of the firmware of the multi-battery system of fig. 6 for determining the primary battery or the secondary battery.
Detailed Description
In order to further understand the objects, structures, features and functions of the present invention, the following embodiments are described in detail.
Referring to fig. 1, fig. 1 is a schematic view of a multi-battery system for an electric vehicle according to an embodiment of the present invention. The multi-battery system 100 includes a plurality of batteries 10, a first connector 30, and a second connector 40. The battery 10 includes a microcontroller 16, a battery connector 12, a battery cell 18, a positive interface P1+, and a negative interface P1-. The battery connector 12 has a detection unit 14. The positive electrode port P1+ is electrically connected to the positive electrode of the battery cell 18, and the negative electrode port P1-is electrically connected to the negative electrode of the battery cell 18. The first connector 30 has a first identification cell 32, a first positive terminal P3+, a first negative terminal P3-, the first connector 30 being for connection to the battery connector 12. The second connector 40 has a second identification unit 42, a second positive terminal P4+ and a second negative terminal P4-, the second connector 40 is used to connect the battery connector 12. The first connector 30 is electrically connected to the motor controller 50 through the lines 44 and 46. The second connector 40 is electrically connected to the motor controller 50 through the lines 45 and 46. The motor controller 50 is used to provide power and control signals to the motor 19 of the electric vehicle.
Referring to fig. 1 and 2 together, fig. 2 is another schematic diagram of the multi-battery system of fig. 1. The positive pole M + of the motor controller 50 is electrically connected to the first positive terminal P3+ of the first connector 30 and the second positive terminal P4+ of the second connector 40, and the negative pole M-of the motor controller 50 is electrically connected to the first negative terminal P3-of the first connector 30 and the second negative terminal P4-of the second connector 40. The microcontrollers 16 of the two batteries 10 are connected via lines 44 and 45 (as shown in fig. 1) and execute a communication protocol, for example using a Controller Area Network Bus (CANBUS). The battery 10 includes a microcontroller 16 to execute firmware. The first positive terminal P3+ and the first negative terminal P3-are connected to a charger via electric wires (not shown) to charge the battery 10, and the second positive terminal P4+ and the second negative terminal P4-are connected to a charger via electric wires (not shown) to charge the battery 10. When the battery 10 performs the function of the main battery, the microcontroller 16 communicates with the motor controller 50 via the first connector 30, the line 44 and the line 46 by using a Universal Asynchronous Receiver Transmitter (UART).
With continued reference to fig. 3, fig. 3 is a schematic diagram of the battery connector 12 of the multiple battery system 100. The detecting unit 14 of the battery connector 12 may be the first pin a4 in fig. 3, the pins for CANBUS communication may be the pin a8 and the pin a9, and the pins for UART communication may be the pin a2 and the pin a 3.
With continued reference to fig. 4A, fig. 4A is a schematic diagram of a first connector of a multiple battery system. The identification unit 32 of the first connector 30 can be the third pin b4 in fig. 4A. The pins for the CANBUS communication may be pin b8 and pin b 9. The pins for UART communication may be pin b2 and pin b 3. The first positive terminal P3+ of the first connector 30 is connected to the positive interface P1+ of the battery connector 12, and the first negative terminal P3-of the first connector 30 is connected to the negative interface P1-of the battery connector 12.
When the first identification unit 32 is set to a first predetermined value (e.g., a first voltage level) and the detection unit 14 is connected to the first identification unit 32, the battery 10 is set as the main battery, and the microcontroller 16 performs the function of the main battery. When the third pin b4 is not electrically connected to the first negative terminal P3-, the first potential is high.
With continued reference to fig. 4B, fig. 4B is a schematic diagram of a second connector of a multiple battery system. The second identification unit 42 of the second connector 40 may be the fifth pin c4 in fig. 4B. Pins of the area network bus CANBUS can be a pin c8 and a pin c 9. The second positive terminal P4+ of the second connector 40 is connectable to the positive interface P1+ of the battery connector 12, and the second negative terminal P4-of the second connector 40 is connectable to the negative interface P1-of the battery connector 12.
When the second identification unit 42 is set to a second predetermined value (e.g., a second voltage level) and the detection unit 14 is connected to the second identification unit 42, the battery 10 is set as a sub-battery, and the microcontroller 16 performs the function of the sub-battery. When the fifth pin c4 is electrically connected to the second negative terminal P4-, the second potential is low.
For example, when the pin b4 of the first identification element 32 is connected to the first positive terminal P3+, the first predetermined value of the first identification element 32 is set to high, and the firmware of the microcontroller 16 of the battery 10 performs the function of the main battery. When the pin c4 of the second identification unit 42 is connected to the second negative terminal P4-, the second predetermined value of the second identification unit 42 is set to a low level, and the microcontroller 16 of the battery 10 allows the battery 10 to perform the function of a sub-battery.
With continued reference to fig. 5, fig. 5 is a flowchart illustrating the firmware of the multi-battery system for the electric vehicle in fig. 1 determining the battery operating mode. The method 500 includes the following steps.
S502: starting the process;
s504: if the detecting unit 14 detects the first predetermined value, the firmware determines that the battery 10 is the primary battery, otherwise, step S508 is executed;
s508: if the detecting unit 14 detects the second predetermined value, the firmware determines that the battery 10 is the sub-battery, otherwise, step S520 is executed;
s520: and ending the flow.
The firmware of the microcontroller 16 detects the first predetermined value and the second predetermined value of the detecting unit 14 to determine whether the battery is the primary battery or the secondary battery. A first predetermined value, such as a first potential value, and a second predetermined value, such as a second potential value. For example, when the pin a4 is high, the first voltage level is high, and the firmware determines that the battery 10 is the primary battery. When pin a4 is low, the second voltage level is low. The firmware determines that the battery 10 is a sub-battery.
Alternatively, the first predetermined value of the first identification unit 32 may be a first signal sent by the motor controller 50, for example, the pin b4 is provided as a square wave signal by the motor controller 50, and when the detection unit 14 detects the square wave signal, the microprocessor 16 sets the battery 10 as the main battery. Similarly, the motor controller 50 provides a second signal, such as a triangular wave signal, at the pin c4, and when the detecting unit 14 detects the triangular wave signal, the microprocessor 16 sets the battery 10 as the sub-battery.
With continued reference to fig. 6, fig. 6 is a schematic diagram of a multiple battery system for an electric vehicle in accordance with another embodiment of the present invention. In another embodiment, when the multi-battery system 200 includes four batteries 10, the detecting unit 14 detects the first to fourth predetermined values of the first to fourth connectors (30, 40, 60, 80) with two pins (the first pin a4 and the second pin a 1). The first identification cell 32 has a third pin b4 and a fourth pin b 1. The second identification cell 42 has a fifth pin c4 and a sixth pin c 1. The third identification cell 52 has a seventh pin d4 and an eighth pin d 1. The fourth identification cell 62 has a ninth pin e4 and a tenth pin e 1. When the detecting unit 14 detects a first predetermined value, the battery 10 performs a main battery function, and when the detecting unit 14 detects second to fourth predetermined values, the battery 10 performs first to third sub-battery functions. For example, the first predetermined value represents that the two pins (b4, b1) of the first recognition unit 32 are both high, the second predetermined value represents that the two pins (c4, c1) of the second recognition unit 42 are low and high, respectively, the third predetermined value represents that the two pins (d4, d1) of the third recognition unit 52 are high and low, respectively, and the fourth predetermined value represents that the two pins (e4, e1) of the fourth recognition unit 62 are both low.
With continued reference to fig. 7, fig. 7 is a flowchart illustrating the determination of the primary or secondary power by the firmware of the multi-battery system for an electric vehicle of fig. 6. The method 600 includes the following steps.
S602: starting the process;
s604: if the detecting unit 14 detects the first predetermined value, the firmware determines itself to be the main battery, otherwise, step S608 is executed;
s608: if the detecting unit 14 detects the second predetermined value, the firmware determines that the battery is the first sub-battery, otherwise, step S612 is executed;
s612: if the detecting unit 14 detects the third predetermined value, the firmware determines that the firmware is the second sub-battery, otherwise, step S616 is executed;
s616: if the detecting unit 14 detects the fourth predetermined value, the firmware determines that the battery is the third sub-battery, otherwise, step S620 is executed;
s620: and ending the flow.
Generally, the main function of the main battery is to detect the voltage of the main battery and the voltages and the amounts of electricity of the other sub-batteries, and control the charging/discharging of each sub-battery according to the voltages or amounts of electricity. In addition, the primary battery also detects the temperature and other operational data of the primary and secondary batteries and communicates with the motor controller via a communication protocol (e.g., UART). The secondary battery is wired to the primary battery and communicates with the primary battery using a communication protocol (e.g., CANBUS) to determine whether the secondary battery is activated or deactivated. The sub-battery receives the instruction of the main battery to determine whether to continue to supply power, and if an error occurs during operation, an error message is sent to the main battery.
In summary, the present invention provides a multi-battery system for an electric vehicle, which includes a plurality of batteries, a first connector, and a second connector. Each battery includes a battery connector having a detection unit. The first connector has a first identification unit. The second connector has a second identification unit. The first connector and the second connector are used for electrically connecting the battery and the motor controller. When the first identification unit is set to a first predetermined value and the detection unit is electrically connected to the first identification unit, the battery is set as a main battery. When the second identification unit is set to a second predetermined value and the detection unit is electrically connected to the second identification unit, the battery is set as a sub-battery. The multi-battery system sets the battery as the main battery or the auxiliary battery through the judgment of the identification unit on the preset value, does not need to set a switch, is more convenient for a user, and can avoid the damage risk of the circuit.
The present invention is capable of other embodiments, and various changes and modifications may be made by one skilled in the art without departing from the spirit and scope of the invention.
Claims (10)
1. A multiple battery system for an electric vehicle, the multiple battery system comprising:
a plurality of batteries respectively comprising a microcontroller and a battery connector, the battery connector having a detection unit;
the first connector is provided with a first identification unit and is used for electrically connecting the battery connector and the motor controller; and
a second connector having a second identification unit, the second connector being used to electrically connect a battery connector of another battery and the motor controller;
when the first identification unit is set to a first preset value and the detection unit is electrically connected with the first identification unit, the microcontroller of the battery sets the battery as a main battery; when the second identification unit is set to a second predetermined value and the detection unit of the other battery is electrically connected to the second identification unit, the microcontroller of the other battery sets the other battery as a sub-battery.
2. The multiple battery system of claim 1, wherein the detection unit comprises a first pin and the first identification unit comprises a third pin.
3. The battery system of claim 2, wherein the second identification cell comprises a fifth pin, the fifth pin being electrically connected to the second potential.
4. The battery system of claim 1, wherein the detection unit comprises two pins, the first identification unit comprises two pins, and the two pins of the first identification unit provide the first predetermined value.
5. A multi-battery system as in claim 1, wherein the first predetermined value is a first potential value and the second predetermined value is a second potential value.
6. A multi-battery system as in claim 1, wherein the first predetermined value is a first signal and the second predetermined value is a second signal.
7. A multi-battery system as claimed in claim 1, wherein the microcontroller of the master battery implements a protocol with the motor controller via the first connector, wiring.
8. A multi-battery system as claimed in claim 1 wherein the primary battery detects temperature and other operational data of itself and the secondary battery and communicates with the motor controller using a communications protocol.
9. A multi-battery system as claimed in claim 1, wherein the microcontroller of the primary battery and the microcontroller of the secondary battery are connected via a line and execute a protocol via the line.
10. A multi-battery system as claimed in claim 9, wherein the secondary battery receives a command from the primary battery to determine whether to continue to supply power.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911335077.3A CN113085657B (en) | 2019-12-23 | 2019-12-23 | Multiple battery system for electric vehicles |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911335077.3A CN113085657B (en) | 2019-12-23 | 2019-12-23 | Multiple battery system for electric vehicles |
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| CN113085657A true CN113085657A (en) | 2021-07-09 |
| CN113085657B CN113085657B (en) | 2022-10-28 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117234115A (en) * | 2023-11-15 | 2023-12-15 | 深圳安培时代数字能源科技有限公司 | Control method and related device of electric wheelchair |
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| CN105471014A (en) * | 2014-09-25 | 2016-04-06 | 本田技研工业株式会社 | Charging system |
| CN208369251U (en) * | 2018-05-21 | 2019-01-11 | 义乌志星汽车零部件制造有限公司 | A kind of more battery parallel charge-discharge control devices of automobile |
| CN110249475A (en) * | 2017-09-27 | 2019-09-17 | 株式会社Lg化学 | Battery module balancing device and battery pack and vehicle including it |
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2019
- 2019-12-23 CN CN201911335077.3A patent/CN113085657B/en active Active
Patent Citations (5)
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| US20060097697A1 (en) * | 2004-11-10 | 2006-05-11 | Eaglepicher Technologies, Llc | Method and system for cell equalization with switched charging sources |
| CN102842928A (en) * | 2011-06-24 | 2012-12-26 | 皆盈绿动能科技股份有限公司 | Energy management system for multiple batteries |
| CN105471014A (en) * | 2014-09-25 | 2016-04-06 | 本田技研工业株式会社 | Charging system |
| CN110249475A (en) * | 2017-09-27 | 2019-09-17 | 株式会社Lg化学 | Battery module balancing device and battery pack and vehicle including it |
| CN208369251U (en) * | 2018-05-21 | 2019-01-11 | 义乌志星汽车零部件制造有限公司 | A kind of more battery parallel charge-discharge control devices of automobile |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN117234115A (en) * | 2023-11-15 | 2023-12-15 | 深圳安培时代数字能源科技有限公司 | Control method and related device of electric wheelchair |
| CN117234115B (en) * | 2023-11-15 | 2024-02-02 | 深圳安培时代数字能源科技有限公司 | Control method and related device of electric wheelchair |
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| CN113085657B (en) | 2022-10-28 |
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Effective date of registration: 20231226 Address after: 360 Heshan Road, High tech Zone, Suzhou City, Jiangsu Province Patentee after: Suzhou Dayu Electric Energy Technology Co.,Ltd. Patentee after: Dayu Electric Energy Technology Co.,Ltd. Address before: 215011 No. 99 Chuk Yuen Road, hi tech Zone, Jiangsu, Suzhou Patentee before: DARFON ELECTRONICS (SUZHOU) Co.,Ltd. (DFS) Patentee before: DARFON ELECTRONICS Corp. |
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