CN110745012A - Novel hybrid battery topology system - Google Patents
Novel hybrid battery topology system Download PDFInfo
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- CN110745012A CN110745012A CN201911043636.3A CN201911043636A CN110745012A CN 110745012 A CN110745012 A CN 110745012A CN 201911043636 A CN201911043636 A CN 201911043636A CN 110745012 A CN110745012 A CN 110745012A
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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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- 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
- B60L50/66—Arrangements of batteries
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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
- 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
- B60L58/12—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries responding to state of charge [SoC]
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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
- 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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- 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)
- Life Sciences & Earth Sciences (AREA)
- Sustainable Development (AREA)
- Sustainable Energy (AREA)
- Power Engineering (AREA)
- Transportation (AREA)
- Mechanical Engineering (AREA)
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
- Secondary Cells (AREA)
Abstract
The invention relates to the technical field of battery control, and discloses a novel hybrid battery topology system, which comprises a high-energy battery system, a high-power battery system and a current controller, wherein the high-energy battery system is connected with the current controller; the high-energy battery system is used for charging or discharging at medium and below-medium power and undertakes the discharging working condition of the medium and below-medium power; the high-power battery system is used for high-power charging or discharging work and bears the high-power discharging working condition; and the current controller is used for balancing the voltage and current flow directions of the high-energy battery system and the high-power battery system under different working conditions. The invention fully utilizes the advantage of high energy density by the high-energy battery cell to ensure high output energy; the high-power battery core bears main output, the high-energy battery core is effectively prevented from entering a high-load low-efficiency interval, the internal energy loss of the high-energy battery core and the severe rise of the internal temperature of the battery are avoided, and the aims of improving the safety performance of the whole system and reducing the energy consumption ratio are fulfilled.
Description
Technical Field
The invention relates to the technical field of battery control, in particular to a novel hybrid battery topology system.
Background
In the new energy vehicle market, the power battery has two key requirements of high energy and high power in the application scene, and respectively corresponds to the high endurance mileage of the electric vehicle, the power characteristic of high torque output and the high-rate charging characteristic, and the lithium battery cell cannot realize the two key characteristics through a single technical condition under the constraint of a matching system of a positive electrode material, a negative electrode material, an electrolyte solution and the like.
At present, because the development cost and the production and manufacturing cost of a new energy electric vehicle are extremely high, the power battery is often required to be compatible with the requirements of most vehicle types so as to ensure that enough output is obtained to balance the development and manufacturing costs. However, different vehicle types do not have completely the same requirements for power and energy, and the requirements for power and energy are respectively reflected in the aspects of acceleration performance and endurance mileage of starting and overtaking, so that the optimization of the performance of the whole vehicle is difficult to realize through a single battery at present.
Disclosure of Invention
Aiming at the defects of single application mode and large performance limitation in the prior art, the invention provides a novel hybrid battery topology system.
In order to solve the above technical problems, the present invention is solved by the following technical solutions.
A novel hybrid battery topology system comprises a high-energy battery system, a high-power battery system and a current controller;
the high-energy battery system is used for charging or discharging at medium and below-medium power and undertakes the discharging working condition of the medium and below-medium power;
the high-power battery system is used for high-power charging or discharging work and bears the high-power discharging working condition;
and the current controller is used for balancing the voltage and current flow directions of the high-energy battery system and the high-power battery system under different working conditions, ensuring that the whole battery system can respond to the power and energy requirements of a load and a charging source, and distributing the power and energy burden between the high-energy battery system and the high-power battery system.
Preferably, the current controller comprises a unidirectional high-voltage high-current module and a unidirectional high-voltage current-limiting module.
Preferably, the load is a discharge part of the battery system, and the current operation condition is matched with the actually required operation condition, including the adjustment of the working current and the working voltage.
Preferably, the charging is a charging component of the battery system, and energy comes from a charging source and is used for adjusting the actually required current to be matched with the current battery system.
Preferably, the operation modes of the current controller include an initialization mode, a standby mode, a current-unlimited discharging mode, a current-limited charging mode, a sleep mode and a fault mode;
the initialization mode is used for starting initialization of the whole system according to an external or internal wake-up command, and carrying out initial power-on, internal configuration and self-check of the system;
the standby mode is used for setting the whole system to wait for the input of external charging and discharging requirements;
in the non-current-limiting discharge mode, when a discharge requirement exists outside, the high-energy battery system preferentially provides discharge energy, and the current controller adjusts the current direction according to the voltage difference between the high-energy battery system and the high-power battery system;
in the current-limiting charging mode, under the condition that the charging requirement exists outside and the system does not discharge outwards, the current controller adjusts the charging current value from the high-energy battery system to the high-power battery system according to the external requirement and the voltages of the high-energy battery system and the high-power battery system;
the system enters a sleep state and then enters an initialization state again after waiting for a wake-up command;
and in the fault mode, after the system enters the fault state, the external charge-discharge loop is cut off, the internal charge-discharge loop is cut off, a flag bit is set, the fault state is reported, and the system waits for an external recovery instruction to enter the initialization state again.
Preferably, the initialization mode includes checking voltage ranges of the high-energy battery system and the high-power battery system, and entering the standby mode when the initialization is completed and no fault exists, wherein the current state of the current controller includes a current direction and a current value; if a fault is identified, a fault mode is entered.
Preferably, in the unlimited current discharging mode, if the voltage of the high-energy battery system is less than or equal to the voltage of the high-power battery system, the current controller sets the current direction from the high-power battery system to the high-energy battery system according to the battery states fed back by the high-energy battery system and the high-power battery system, and sets the unlimited current value.
Preferably, in the current-limiting charging mode, when the voltage of the high-energy battery system is greater than the lowest voltage of the high-energy battery system and the voltage of the high-power battery system is less than the highest voltage of the high-power battery system, the current direction is set from the high-energy battery system to the high-power battery system, the corresponding current value and the upper limit of the cut-off voltage are limited, and when the charging requirement is completed or the charging requirement is suspended, the standby state is returned.
Preferably, in the failure mode, the external recovery instruction includes a hardware reset, software fault clear and re-wake instruction.
Due to the adoption of the technical scheme, the invention has the remarkable technical effects that: the invention is creatively and mixedly used for two battery systems with different characteristics, and realizes the extreme working condition application which cannot be achieved by the existing battery system through a novel current control strategy of a current controller, and the high-energy battery cell fully utilizes the advantage of high energy density in the use working condition requiring high energy, thereby ensuring high output energy; in the use operating mode that needs the high power, the main output is undertaken to the electric core of high power, and high energy type electric core entering high load low efficiency interval is effectively avoided like this, and then has avoided the internal energy loss of high energy type electric core to avoid the battery inside temperature to rise acutely, realize improving whole system security performance and the purpose of reducing the energy consumption ratio.
Drawings
Fig. 1 is a schematic diagram of a hybrid battery topology system according to the present invention;
fig. 2 is a schematic diagram of the operation mode of a novel hybrid battery topology system according to the present invention.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and examples.
Example 1
As shown in fig. 1 to 2, a novel hybrid battery topology system includes a high-energy battery system, a high-power battery system and a current controller;
the high-energy battery system has the characteristic of high energy density, is used for charging or discharging at medium and below-medium power and bears the discharging working condition of the medium and below-medium power;
the high-power battery system has the characteristic of high power density, is used for high-power charging or discharging work and bears the high-power discharging working condition;
the current controller is used for balancing the voltage and current flow directions of the high-energy battery system and the high-power battery system under different working conditions, ensuring that the whole battery system can respond to the power and energy requirements of a load and a charging source, and reasonably distributing the power and energy burden between the high-energy battery system and the high-power battery system.
The current controller comprises a one-way high-voltage large-current module and a one-way high-voltage current limiting module.
The load is a discharging component of the battery system, and the current operation condition is matched with the actually required operation condition, including the adjustment of the working current and the working voltage.
The charging is a charging component of the battery system, the energy comes from a charging source, and the charging source can be a vehicle-mounted charger or a charging pile outside the vehicle and is used for adjusting the actually required current to be matched with the current battery system.
The working modes of the current controller comprise an initialization mode, a standby mode, a non-current-limiting discharging mode, a current-limiting charging mode, a sleep mode and a fault mode;
the initialization mode is used for starting initialization of the whole system according to an external or internal wake-up command, and carrying out initial power-on, internal configuration and self-check of the system;
the standby mode is used for setting the whole system to wait for the input of external charging and discharging requirements;
in the non-current-limiting discharge mode, when a discharge requirement exists outside, the high-energy battery system preferentially provides discharge energy, and the current controller adjusts the current direction according to the voltage difference between the high-energy battery system and the high-power battery system;
in the current-limiting charging mode, under the condition that the charging requirement exists outside and the system does not discharge outwards, the current controller adjusts the charging current value from the high-energy battery system to the high-power battery system according to the external requirement and the voltages of the high-energy battery system and the high-power battery system;
the system enters a sleep state and then enters an initialization state again after waiting for a wake-up command;
and in the fault mode, after the system enters the fault state, the external charge-discharge loop is cut off, the internal charge-discharge loop is cut off, a flag bit is set, the fault state is reported, and the system waits for an external recovery instruction to enter the initialization state again.
In the initialization mode, the voltage ranges of a high-energy battery system and a high-power battery system are checked, the current state of a current controller comprises the current direction and the current value, and when the initialization is completed and no fault exists, the standby mode is entered; if a fault is identified, a fault mode is entered.
In the current-unlimited discharge mode, if the voltage of the high-energy battery system is less than or equal to the voltage of the high-power battery system, the current controller sets the current direction from the high-power battery system to the high-energy battery system according to the battery states fed back by the high-energy battery system and the high-power battery system, and sets an unlimited current value.
In the current-limiting charging mode, when the voltage of the high-energy battery system is greater than the lowest voltage of the high-energy battery system and the voltage of the high-power battery system is less than the highest voltage of the high-power battery system, the current direction is set from the high-energy battery system to the high-power battery system, the corresponding current value and the upper limit of the voltage are limited, and when the charging requirement is completed or the charging requirement is stopped, the high-power battery system returns to the standby state.
In the failure mode, the external recovery instructions include a hardware reset, software fault clear and re-wake instruction.
Regarding the determination of the power level, the discharge rate is considered to be equal to or lower than 1C, and the discharge rate is considered to be medium or lower, and the discharge rate is considered to be high rate above 1C.
The invention is creatively and mixedly used for two battery systems with different characteristics, and realizes the extreme working condition application which cannot be achieved by the existing battery system through a novel current control strategy of a current controller, and the high-energy battery cell fully utilizes the advantage of high energy density in the use working condition requiring high energy, thereby ensuring high output energy; in the use operating mode that needs the high power, the main output is undertaken to the electric core of high power, and high energy type electric core entering high load low efficiency interval is effectively avoided like this, and then has avoided the internal energy loss of high energy type electric core to avoid the battery inside temperature to rise acutely, realize improving whole system security performance and the purpose of reducing the energy consumption ratio.
Example 1
For convenience of description, the high-power battery system is the battery system 1, and the high-power battery system is the battery system 2.
In the initial state, the battery system 1 and the battery system 2 are fully charged, the voltage of the battery system 1 is greater than or equal to that of the battery system 2, no current flows from an external load and a charging power supply, and the hybrid battery system does not receive an external charging demand.
When the load starts to request a high power discharge, i.e. current flows from the hybrid battery system to the load, the discharge is first assumed by the battery system 1, since the current controller defaults to the bidirectional off-state.
Because of the characteristics of the battery, as the electric energy of the battery system 1 decreases, the voltage of the battery system 1 starts to decrease until the current controller is triggered to enter the non-current-limiting discharging mode, so that the non-current-limiting discharging from the battery system 2 to the battery system 1 and the load is realized.
When the load discharge is finished, the voltages of the battery system 1 and the battery system 2 start to rise back because of the characteristics of the battery, if the voltage of the battery system 1 is larger than the voltage of the battery system 2, the current-unlimited discharge mode exits, the standby mode is returned, and at the moment, the current loop between the battery system 1 and the battery system 2 is cut off, and the current value is zero.
Example 2
For convenience of description, the high-power battery system is the battery system 1, and the high-power battery system is the battery system 2.
In the initial state, after the last discharge is finished, the voltage of the battery system 1 is greater than that of the battery system 2, and the hybrid battery system receives an external charging demand.
And entering a current-limiting charging mode, charging the battery system 2 by the battery system 1 through a current controller, and determining the current according to the external charging requirement.
Because of the characteristics of the battery, as the electric energy of the battery system 2 increases, the voltage of the battery system 2 starts to rise, and when the voltage of the battery system 2 reaches a set charge cutoff voltage, the charge is terminated, and the standby mode is returned.
In summary, the above-mentioned embodiments are only preferred embodiments of the present invention, and all equivalent changes and modifications made in the claims of the present invention should be covered by the claims of the present invention.
Claims (9)
1. A novel hybrid battery topology system, characterized by: the system comprises a high-energy battery system, a high-power battery system and a current controller;
the high-energy battery system is used for charging or discharging at medium and below-medium power and undertakes the discharging working condition of the medium and below-medium power;
the high-power battery system is used for high-power charging or discharging work and bears the high-power discharging working condition;
and the current controller is used for balancing the voltage and current flow directions of the high-energy battery system and the high-power battery system under different working conditions, ensuring that the whole battery system can respond to the power and energy requirements of a load and a charging source, and distributing the power and energy burden between the high-energy battery system and the high-power battery system.
2. The novel hybrid battery topology system of claim 1, wherein: the current controller comprises a one-way high-voltage large-current module and a one-way high-voltage current limiting module.
3. The novel hybrid battery topology system of claim 1, wherein: the load is a discharging component of the battery system, and the current operation condition is matched with the actually required operation condition, including the adjustment of the working current and the working voltage.
4. The novel hybrid battery topology system of claim 1, wherein: the charging is a charging component of the battery system, and energy comes from a charging source and is used for adjusting the actually required current to be matched with the current battery system.
5. The novel hybrid battery topology system of claim 1, wherein: the working modes of the current controller comprise an initialization mode, a standby mode, a non-current-limiting discharging mode, a current-limiting charging mode, a sleep mode and a fault mode;
the initialization mode is used for starting initialization of the whole system according to an external or internal wake-up command, and carrying out initial power-on, internal configuration and self-check of the system;
the standby mode is used for setting the whole system to wait for the input of external charging and discharging requirements;
in the non-current-limiting discharge mode, when a discharge requirement exists outside, the high-energy battery system preferentially provides discharge energy, and the current controller adjusts the current direction according to the voltage difference between the high-energy battery system and the high-power battery system;
in the current-limiting charging mode, under the condition that the charging requirement exists outside and the system does not discharge outwards, the current controller adjusts the charging current value from the high-energy battery system to the high-power battery system according to the external requirement and the voltages of the high-energy battery system and the high-power battery system;
the system enters a sleep state and then enters an initialization state again after waiting for a wake-up command;
and in the fault mode, after the system enters the fault state, the external charge-discharge loop is cut off, the internal charge-discharge loop is cut off, a flag bit is set, the fault state is reported, and the system waits for an external recovery instruction to enter the initialization state again.
6. The novel hybrid battery topology system of claim 5, wherein: in the initialization mode, the voltage ranges of a high-energy battery system and a high-power battery system are checked, the current state of a current controller comprises the current direction and the current value, and when the initialization is completed and no fault exists, the standby mode is entered; if a fault is identified, a fault mode is entered.
7. The novel hybrid battery topology system of claim 5, wherein: in the current-unlimited discharge mode, if the voltage of the high-energy battery system is less than or equal to the voltage of the high-power battery system, the current controller sets the current direction from the high-power battery system to the high-energy battery system according to the battery states fed back by the high-energy battery system and the high-power battery system, and sets an unlimited current value.
8. The novel hybrid battery topology system of claim 5, wherein: in the current-limiting charging mode, when the voltage of the high-energy battery system is greater than the lowest voltage of the high-energy battery system, the current-limiting charging mode is adopted
The voltage of the high-power battery system is smaller than the highest voltage of the high-power battery system, the current direction is set from the high-energy battery system to the high-power battery system, the corresponding current value and the upper limit of the voltage are limited, and when the charging requirement is completed or the charging requirement is stopped, the high-power battery system returns to the standby state.
9. The novel hybrid battery topology system of claim 5, wherein: in the failure mode, the external recovery instructions include a hardware reset, software fault clear and re-wake instruction.
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104044482A (en) * | 2013-03-14 | 2014-09-17 | 福特全球技术公司 | Dual Lithium-Ion Battery System for Electric Vehicles |
| CN207683366U (en) * | 2017-11-23 | 2018-08-03 | 谢腾哲 | A kind of hybrid battery system for electric vehicle |
| CN207772912U (en) * | 2017-10-20 | 2018-08-28 | 南京泓凯动力系统科技有限公司 | Battery management system |
| WO2018162021A1 (en) * | 2017-03-06 | 2018-09-13 | Volvo Truck Corporation | A battery cell state of charge estimation method and a battery state monitoring system |
| CN110065416A (en) * | 2018-01-23 | 2019-07-30 | 通用汽车环球科技运作有限责任公司 | For with high-power and Energy Management System and method of high energy battery group vehicle |
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- 2019-10-30 CN CN201911043636.3A patent/CN110745012B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104044482A (en) * | 2013-03-14 | 2014-09-17 | 福特全球技术公司 | Dual Lithium-Ion Battery System for Electric Vehicles |
| WO2018162021A1 (en) * | 2017-03-06 | 2018-09-13 | Volvo Truck Corporation | A battery cell state of charge estimation method and a battery state monitoring system |
| CN207772912U (en) * | 2017-10-20 | 2018-08-28 | 南京泓凯动力系统科技有限公司 | Battery management system |
| CN207683366U (en) * | 2017-11-23 | 2018-08-03 | 谢腾哲 | A kind of hybrid battery system for electric vehicle |
| CN110065416A (en) * | 2018-01-23 | 2019-07-30 | 通用汽车环球科技运作有限责任公司 | For with high-power and Energy Management System and method of high energy battery group vehicle |
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