CN111497641A - Operation control method for double-battery system of electric motorcycle - Google Patents
Operation control method for double-battery system of electric motorcycle Download PDFInfo
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- CN111497641A CN111497641A CN202010386200.0A CN202010386200A CN111497641A CN 111497641 A CN111497641 A CN 111497641A CN 202010386200 A CN202010386200 A CN 202010386200A CN 111497641 A CN111497641 A CN 111497641A
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- pack
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- lithium battery
- electric motorcycle
- discharging
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- 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
- B60L50/00—Electric propulsion with power supplied within the vehicle
- B60L50/50—Electric propulsion with power supplied within the vehicle using propulsion power supplied by batteries or fuel cells
- B60L50/60—Electric propulsion with power supplied within the vehicle using propulsion power supplied by batteries or fuel cells using power supplied by batteries
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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
- H02J7/0013—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries acting upon several batteries simultaneously or sequentially
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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
- H02J7/0013—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries acting upon several batteries simultaneously or sequentially
- H02J7/0025—Sequential battery discharge in systems with a plurality of batteries
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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
- H02J7/0063—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with circuits adapted for supplying loads from the battery
-
- 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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- 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
- Y02T90/00—Enabling technologies or technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02T90/10—Technologies relating to charging of electric vehicles
- Y02T90/16—Information or communication technologies improving the operation of electric vehicles
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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)
- Secondary Cells (AREA)
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
- Electric Propulsion And Braking For Vehicles (AREA)
Abstract
The invention discloses an operation control method of a double-battery system of an electric motorcycle, which relates to the technical field of power supply design of the electric motorcycle.
Description
Technical Field
The invention relates to the technical field of power supply design of electric motorcycles, in particular to an operation control method of a double-battery system of an electric motorcycle.
Background
As is known, in order to meet the requirements of power performance indexes (maximum speed, acceleration performance, climbing capability, driving range) and to meet the driving requirements and purchasing capabilities of different target customers, an electric motorcycle is gradually changed from a conventional single battery power supply system to a conventional dual battery power supply system. The two groups of lithium battery packs have the same voltage grade and the same or different rated capacities, and can be used independently or in parallel.
Due to the fact that the two groups of lithium batteries are different in capacity and voltage, when the two groups of lithium batteries are connected in parallel for use, the phenomenon of large-current mutual charging and discharging can occur, and if a corresponding control strategy is not adopted, the risk of personal injury of a vehicle and a driver can be caused.
Therefore, how to provide an operation control method for a dual-battery system of an electric motorcycle becomes a long-term technical demand of the technical personnel in the field.
Disclosure of Invention
In order to overcome the defects in the background art, the invention provides the operation control method of the double battery system of the electric motorcycle, and the invention effectively solves the problem that accidental fire or personnel and property damage is not generated when the double battery system discharges independently and the parallel operation discharges.
In order to achieve the above purpose, the invention adopts the following technical scheme:
a plug A of an electric motorcycle wiring harness end is connected with a lithium battery pack to realize single-pack operation, or the plug A and the plug B of the electric motorcycle wiring harness end are respectively connected with two lithium battery packs to execute double-pack operation according to a control strategy, and the method specifically comprises the following steps:
firstly, respectively arranging a plug A and a plug B at the cable harness end of the electric motorcycle, wherein the plug A and the plug B are respectively connected with a lithium battery pack, the ID0 terminal of the plug A is connected with the anode P + of a power supply in the cable harness, and the ID0 terminal of the plug B is suspended;
secondly, identifying the lithium battery pack connected with the plug A as an A pack according to the ID0 status bit, identifying the lithium battery pack connected with the plug B as a B pack according to the ID0 status bit, carrying out CAN communication on external parts by the A pack at the moment, determining the discharging sequence of the two lithium battery packs, and discharging and outputting the A pack when the VA-VB | > a set value and the VA > VB; when VA-VB > the set value and VB > VA, the B packet is discharged and output; when VA-VB |, the A packet and the B packet are in parallel discharge output, and the two lithium battery packets are subjected to voltage comparison at any time during the whole discharge operation period and execute the discharge strategy.
According to the operation control method of the double-battery system of the electric motorcycle, in the first step, the two lithium battery packs are two identical lithium battery packs.
In the operation control method of the electric motorcycle dual-battery system, the set value in the second step is 2V.
In the operation control method of the double-battery system of the electric motorcycle, the specific steps of connecting and disconnecting the two lithium battery packs in the second step are as follows:
firstly, a lithium battery pack is connected with a plug A, the ID0 detects P + high level through a whole vehicle wire harness, the battery pack is identified as a pack A, and at the moment, the following two conditions exist:
①, the plug B is already connected with another lithium battery pack, namely the pack B exists, the pack-in-pack discharging scheme is executed at the moment, then when the plug A keeps connected and the plug B keeps disconnected, the pack A continues to discharge, when the plug A is disconnected and the plug B keeps connected, the pack A and the pack B finish discharging at the same time, the pack B is in a standby state, and when the plug A and the plug B are disconnected at the same time, the pack A and the pack B finish discharging at the same time;
②, the plug B is not connected with the lithium battery pack, at the moment, the single-pack operation is performed, the A-pack discharging scheme is executed until the plug A is disconnected, and discharging is finished;
the second step, plug B connect the lithium cell package, and ID0 does not detect P + high level through whole car pencil, and this lithium cell package discernment is the B package, has following two kinds of condition this moment:
①, when the plug A is connected with the lithium battery pack, namely the pack A exists, the pack-in-pack discharging scheme is executed, and then when the plug A keeps connected and the plug B keeps disconnected, the pack A continues to discharge;
②, the plug A is not connected with the lithium battery pack, at this time, the pack B is not discharged, the whole vehicle has no power supply output, and the pack B is in a standby state until the plug B is disconnected.
By adopting the technical scheme, the invention has the following advantages:
the method and the device confirm the discharge strategy according to the connection state of the lithium battery pack, and cannot cause large-current mutual charging among the lithium battery packs due to too large pressure difference and capacity difference during the pack, so that the whole vehicle line and the lithium battery pack are damaged, and the like.
Drawings
FIG. 1 is a discharge flow diagram provided by an embodiment of the present invention;
fig. 2 is a connection diagram of a lithium battery pack.
Detailed Description
The present invention will be explained in more detail by the following examples, which are not intended to limit the invention;
the operation control method of the electric motorcycle dual-battery system is described with reference to the accompanying drawings 1-2, wherein a plug A of a wire harness end of an electric motorcycle is connected with a lithium battery pack to realize single-pack operation, or the plug A and the plug B of the wire harness end of the electric motorcycle are respectively connected with two lithium battery packs to execute dual-pack operation according to a control strategy, and specifically comprises the following steps:
firstly, respectively arranging a plug A and a plug B at the cable harness end of an electric motorcycle, wherein the plug A and the plug B are respectively connected with a same lithium battery pack, the ID0 terminal of the plug A is connected with the anode P + of a power supply in the cable harness, and the ID0 terminal of the plug B is suspended;
secondly, identifying the lithium battery pack connected with the plug A as an A pack according to the ID0 status bit, identifying the lithium battery pack connected with the plug B as a B pack according to the ID0 status bit, carrying out CAN communication on external parts by the A pack at the moment, determining the discharging sequence of the two lithium battery packs, and discharging and outputting the A pack when the VA-VB | > a set value and the VA > VB; when VA-VB > the set value and VB > VA, the B packet is discharged and output; when VA-VB ≦ the set value, the A packet and the B packet are in parallel discharge output, the voltage of the two lithium battery packets is compared at any time during the whole discharge operation period, the discharge strategy is executed, and the set value is preferably 2V in specific implementation.
Further, the specific steps of connecting and disconnecting the two lithium battery packs are as follows:
first step, a lithium battery package is connected to plug A, and ID0 detects P + high level through whole car pencil, and this lithium battery package discernment is A package, has following two kinds of condition this moment:
①, the plug B is already connected with another lithium battery pack, namely the pack B exists, the pack-in-pack discharging scheme is executed at the moment, then when the plug A keeps connected and the plug B keeps disconnected, the pack A continues to discharge, when the plug A is disconnected and the plug B keeps connected, the pack A and the pack B finish discharging at the same time, the pack B is in a standby state, and when the plug A and the plug B are disconnected at the same time, the pack A and the pack B finish discharging at the same time;
②, the plug B is not connected with the lithium battery pack, at the moment, the single-pack operation is performed, the A-pack discharging scheme is executed until the plug A is disconnected, and discharging is finished;
secondly, a plug B is connected with a battery pack, the ID0 does not detect P + high level through the whole vehicle wiring harness, the battery pack is identified as a B pack, and the following two conditions are present:
①, when the plug A is connected with the lithium battery pack, namely the pack A exists, the pack-in-pack discharging scheme is executed, and then when the plug A keeps connected and the plug B keeps disconnected, the pack A continues to discharge;
②, the plug A is not connected with the lithium battery pack, at this time, the pack B is not discharged, the whole vehicle has no power supply output, and the pack B is in a standby state until the plug B is disconnected.
Furthermore, during specific implementation, one lithium battery pack can be arranged, at the moment, the plug A on the wiring harness needs to be connected, and if the plug B is connected, the lithium battery pack is in a standby state and cannot discharge and output.
The present invention includes two control strategies, one of which is: the monocell packages the vehicle and operates in a discharging way, the monocell is required to operate and be connected with the A plug on the whole vehicle wiring harness, the battery is identified as the A packet and establishes data interaction with the whole vehicle through CAN communication at the moment, and power required by the operation of the whole vehicle is output; the second step is as follows: the double cell package car and the operation of discharging, when connecting the B plug on whole car pencil earlier, this package discernment is the B package, close the output and wait for A package and insert, connect whole car pencil A plug this moment, discern as the A package, BMS compares voltage and capacity according to the CAN information between two battery packages, when pressure differential is greater than 2V, open the higher battery package of voltage and supply power output, when waiting for two battery package voltage differences to be less than 2V, two battery packages open output simultaneously and get into and the package output stage that discharges. The invention adopts a pack combination control strategy according to the pressure difference, thereby not only ensuring the requirements of large-current discharge and high-power output required by the whole vehicle, but also avoiding the battery damage, the vehicle hidden danger and the like caused by the mutual charging of large current under the condition of larger pressure difference of double battery packs.
When the invention is implemented specifically, the whole vehicle is provided with two detachable lithium battery packs with the same specification, and the plug for connecting the whole vehicle wiring harness and the lithium battery packs is divided into a plug A and a plug B;
the lithium battery pack is in a turn-off state when the output socket is not connected with an external circuit (not connected with a plug of the whole vehicle), and no voltage exists between the measuring terminals;
identifying the battery pack inserted by the plug A on the whole vehicle as a pack A through the ID bit state identification; the battery pack inserted by the plug B is identified as a pack B through the ID bit state identification;
a Battery Management System (BMS) controls whether discharge output of a battery pack is started or not by detecting the connection state and voltage difference of two lithium battery packs, and the BMS is divided into three conditions that ① only has an A plug connected with the battery pack, the battery pack is identified as an A pack and is discharged outwards, ② only has a B plug connected with the battery pack, the battery pack is identified as a B pack and is forbidden to be discharged outwards, ③ A, B plugs are connected with the battery pack, the A, B packs are prepared for discharge at the moment, the A pack is used for conducting CAN communication with devices such as a vehicle power controller, a charger and an instrument, when the voltage difference of A, B packs is larger than 2V, the battery pack with high voltage supplies power outwards and outputs, the other battery pack is turned off, and when the voltage difference of A, B packs is smaller than or equal to 2V.
The present invention is not described in detail in the prior art.
The embodiments selected for the purpose of disclosing the invention, are presently considered to be suitable, it being understood, however, that the invention is intended to cover all variations and modifications of the embodiments which fall within the spirit and scope of the invention.
Claims (4)
1. An operation control method of a double-battery system of an electric motorcycle is characterized in that: the plug A of electric motorcycle pencil end connects a lithium cell package, realizes single package operation, perhaps two lithium cell packages are connected respectively to plug A and plug B of electric motorcycle pencil end, according to the control strategy, carries out two package operations, specifically includes following step:
firstly, respectively arranging a plug A and a plug B at the cable harness end of the electric motorcycle, wherein the plug A and the plug B are respectively connected with a lithium battery pack, the ID0 terminal of the plug A is connected with the anode P + of a power supply in the cable harness, and the ID0 terminal of the plug B is suspended;
secondly, identifying the lithium battery pack connected with the plug A as an A pack according to the ID0 status bit, identifying the lithium battery pack connected with the plug B as a B pack according to the ID0 status bit, carrying out CAN communication on external parts by the A pack at the moment, determining the discharging sequence of the two lithium battery packs, and discharging and outputting the A pack when the VA-VB | > a set value and the VA > VB; when VA-VB > the set value and VB > VA, the B packet is discharged and output; when VA-VB |, the A packet and the B packet are in parallel discharge output, and the two lithium battery packets are subjected to voltage comparison at any time during the whole discharge operation period and execute the discharge strategy.
2. The operation control method of the electric motorcycle dual-battery system as set forth in claim 1, wherein: in the first step, the two lithium battery packs are two identical lithium battery packs.
3. The operation control method of the electric motorcycle dual-battery system as set forth in claim 1, wherein: the set value in the second step is 2V.
4. The operation control method of the electric motorcycle dual-battery system as set forth in claim 1, wherein: the specific steps of connecting and disconnecting the two lithium battery packs in the second step are as follows:
firstly, a lithium battery pack is connected with a plug A, the ID0 detects P + high level through a whole vehicle wire harness, the battery pack is identified as a pack A, and at the moment, the following two conditions exist:
①, the plug B is already connected with another lithium battery pack, namely the pack B exists, the pack-in-pack discharging scheme is executed at the moment, then when the plug A keeps connected and the plug B keeps disconnected, the pack A continues to discharge, when the plug A is disconnected and the plug B keeps connected, the pack A and the pack B finish discharging at the same time, the pack B is in a standby state, and when the plug A and the plug B are disconnected at the same time, the pack A and the pack B finish discharging at the same time;
②, the plug B is not connected with the lithium battery pack, at the moment, the single-pack operation is performed, the A-pack discharging scheme is executed until the plug A is disconnected, and discharging is finished;
the second step, plug B connect the lithium cell package, and ID0 does not detect P + high level through whole car pencil, and this lithium cell package discernment is the B package, has following two kinds of condition this moment:
①, when the plug A is connected with the lithium battery pack, namely the pack A exists, the pack-in-pack discharging scheme is executed, and then when the plug A keeps connected and the plug B keeps disconnected, the pack A continues to discharge;
②, the plug A is not connected with the lithium battery pack, at this time, the pack B is not discharged, the whole vehicle has no power supply output, and the pack B is in a standby state until the plug B is disconnected.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010386200.0A CN111497641A (en) | 2020-05-09 | 2020-05-09 | Operation control method for double-battery system of electric motorcycle |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010386200.0A CN111497641A (en) | 2020-05-09 | 2020-05-09 | Operation control method for double-battery system of electric motorcycle |
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| CN111497641A true CN111497641A (en) | 2020-08-07 |
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| CN202010386200.0A Pending CN111497641A (en) | 2020-05-09 | 2020-05-09 | Operation control method for double-battery system of electric motorcycle |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114454775A (en) * | 2022-03-11 | 2022-05-10 | 国网浙江省电力有限公司金华供电公司 | Working method of vehicle-mounted battery pack, vehicle-mounted battery and electric vehicle |
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| CN106786964A (en) * | 2017-01-16 | 2017-05-31 | 祁国俊 | Battery bag charge-discharge control circuit and power battery system of electric vehicle |
| CN107599857A (en) * | 2017-08-24 | 2018-01-19 | 华南理工大学 | A kind of pure electric automobile charging system and charging method based on lithium battery |
| CN108583327A (en) * | 2018-04-25 | 2018-09-28 | 南京越博动力系统股份有限公司 | A kind of power management system of Double battery electric vehicle |
| CN110949178A (en) * | 2019-12-13 | 2020-04-03 | 重庆美顺电子科技有限公司 | Intelligent lithium battery parallel management control system and method |
-
2020
- 2020-05-09 CN CN202010386200.0A patent/CN111497641A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104167770A (en) * | 2013-07-19 | 2014-11-26 | 郑州宇通客车股份有限公司 | Battery group discharging control method and battery group charging control method |
| CN106786964A (en) * | 2017-01-16 | 2017-05-31 | 祁国俊 | Battery bag charge-discharge control circuit and power battery system of electric vehicle |
| CN107599857A (en) * | 2017-08-24 | 2018-01-19 | 华南理工大学 | A kind of pure electric automobile charging system and charging method based on lithium battery |
| CN108583327A (en) * | 2018-04-25 | 2018-09-28 | 南京越博动力系统股份有限公司 | A kind of power management system of Double battery electric vehicle |
| CN110949178A (en) * | 2019-12-13 | 2020-04-03 | 重庆美顺电子科技有限公司 | Intelligent lithium battery parallel management control system and method |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114454775A (en) * | 2022-03-11 | 2022-05-10 | 国网浙江省电力有限公司金华供电公司 | Working method of vehicle-mounted battery pack, vehicle-mounted battery and electric vehicle |
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Application publication date: 20200807 |