CN115214384A - Battery system for electric vehicle and using method thereof - Google Patents
Battery system for electric vehicle and using method thereof Download PDFInfo
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- CN115214384A CN115214384A CN202110400128.7A CN202110400128A CN115214384A CN 115214384 A CN115214384 A CN 115214384A CN 202110400128 A CN202110400128 A CN 202110400128A CN 115214384 A CN115214384 A CN 115214384A
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- 238000000034 method Methods 0.000 title claims abstract description 19
- GELKBWJHTRAYNV-UHFFFAOYSA-K lithium iron phosphate Chemical compound [Li+].[Fe+2].[O-]P([O-])([O-])=O GELKBWJHTRAYNV-UHFFFAOYSA-K 0.000 description 17
- 238000007599 discharging Methods 0.000 description 7
- 229910052987 metal hydride Inorganic materials 0.000 description 5
- 230000005611 electricity Effects 0.000 description 4
- 230000005540 biological transmission Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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Classifications
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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
- B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
- B60K1/00—Arrangement or mounting of electrical propulsion units
- B60K1/04—Arrangement or mounting of electrical propulsion units of the electric storage means for propulsion
-
- 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
- B60L53/00—Methods of charging batteries, specially adapted for electric vehicles; Charging stations or on-board charging equipment therefor; Exchange of energy storage elements in electric vehicles
- B60L53/80—Exchanging energy storage elements, e.g. removable batteries
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
- B60K1/00—Arrangement or mounting of electrical propulsion units
- B60K1/04—Arrangement or mounting of electrical propulsion units of the electric storage means for propulsion
- B60K2001/0405—Arrangement or mounting of electrical propulsion units of the electric storage means for propulsion characterised by their position
- B60K2001/0438—Arrangement under the floor
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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)
- Transportation (AREA)
- Mechanical Engineering (AREA)
- Power Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- Sustainable Development (AREA)
- Sustainable Energy (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
- Electric Propulsion And Braking For Vehicles (AREA)
- Secondary Cells (AREA)
Abstract
The application relates to a battery system for an electric vehicle and a using method thereof, and belongs to the technical field of new energy vehicles. The battery system for the electric vehicle consists of two sets of battery packs, wherein one set of battery pack is used as a main battery pack, has low electric quantity and a wider working voltage range, and is fixed on the vehicle; the other set of battery pack is used as a slave battery pack, has higher electric quantity and narrower working voltage range, and the slave battery pack is fixed on the electric vehicle or used as a battery replacing battery pack, and the master battery pack and the slave battery pack are connected in parallel. The reliability of the electric automobile application is improved; the problem that the remaining mileage of a set of battery pack is inaccurate is solved, the vehicle is prevented from being anchored, and a driver is reminded to charge or replace the battery in time; the method is suitable for two applications of charging and battery replacement; in the battery replacement application, the slave battery pack is used as the battery pack for battery replacement, the capacity is high, and the battery replacement application has higher energy efficiency; the main battery pack does not need to be specially charged, and the auxiliary battery pack can charge the main battery pack by itself in the running or parking process of the vehicle.
Description
Technical Field
The application relates to a battery system for an electric vehicle and a using method thereof, and belongs to the technical field of new energy vehicles.
Background
Under the conditions of more and more urgent environmental protection and more tense petrochemical resources, "electromotion" has become an undisputable inevitable trend in the global automobile industry. Meanwhile, the method also provides a brand new development opportunity under the background of energy revolution brought to the automobile industry in China. However, today, the domestic new energy automobile industry is still in a continuous optimization and exploration stage.
Generally, a set of battery system is configured on an electric automobile, and during the operation process of the electric automobile, the phenomenon of vehicle anchorage often occurs due to inaccurate judgment of the charge quantity of the battery system (inaccurate residual driving range); and the situations that the electric quantity of the battery system is consumed, the electric appliance on the vehicle cannot work normally and the like often occur.
Disclosure of Invention
In order to solve the problems, the application provides a battery system for an electric automobile, which comprises two sets of battery packs, wherein one set of battery pack is used as a main battery system, has low electric quantity and is fixed on the automobile; the other battery pack is used as a slave battery system, has higher electric quantity, can be used as a battery system for replacing batteries, and can also be fixed on a vehicle for application. The two sets of battery packs have different working voltage ranges, so that the slave battery pack can finish discharging before the master battery pack, a driver is reminded of charging or replacing the battery in time, and the electric automobile can still continue to run after the slave battery pack finishes discharging. Aiming at the defects of the prior art, the battery system for the electric automobile capable of achieving both charging and battery replacement is provided, the battery system consists of two sets of battery packs, one set of battery pack is used as a main battery system, the capacity is low, and the battery system is fixed on the automobile for application; the other set of the battery pack is used as a slave battery system, has higher capacity, can be used as a battery replacing battery pack, and can also be fixed on a vehicle to be charged together with a main battery pack. The two sets of battery packs set different working voltage ranges, so that the main battery pack still has certain capacity after the auxiliary battery packs are discharged, the vehicle can be kept to continuously run for a period of mileage, the problem that the battery charge quantity is inaccurate in the later discharging period is solved, a driver is reminded to charge or replace the battery in time, and the reliability of the electric vehicle is improved by the two sets of battery packs.
The application provides a battery system for electric automobile that can compromise to charge and trade electric usefulness.
1. The battery system is composed of two sets of battery packs, wherein one set is a main battery pack, and the other set is an auxiliary battery pack. The two sets of battery packs are connected in parallel for application in the electric automobile.
2. The main battery pack is fixed on the vehicle for application, and the auxiliary battery pack can be fixed on the vehicle for application and can also be used as a battery replacement pack for application.
3. The master battery pack capacity is not greater than the slave battery pack capacity.
4. The master battery pack and the slave battery packs have different working voltage ranges, the working voltage range of the master battery pack is V1-V2, the working voltage range of the slave battery packs is V3-V2, and V1 is less than V3. The working voltage ranges of the master battery pack and the slave battery packs are within the working voltage range of the electric automobile.
5. At a voltage V3, the main battery still has an amount of electricity not less than S, typically 5-30%.
6. The master battery pack and the slave battery packs may be the same type of battery or different types of batteries.
7. Typically, the master battery pack uses power type batteries, and the slave battery pack uses capacity type batteries.
The application provides a battery system for an electric vehicle, which consists of two sets of battery packs, wherein one set of battery pack is used as a main battery pack, has low electric quantity and is fixed on the vehicle; the other set of battery pack is used as a slave battery pack which has higher electric quantity, the slave battery pack is fixed on the electric vehicle for application or used as a battery replacement pack, and the master battery pack and the slave battery pack are connected in parallel.
Further, in the battery system for electric vehicles, the working voltage range of the master battery pack is V1 to V2, and the working voltage range of the slave battery pack is V3 to V2, and V1 is less than V3; the working voltage ranges of the master battery pack and the slave battery packs are within the working voltage range of the electric vehicle.
Further, in the above battery system for electric vehicles, the main battery pack still has an amount of electricity not less than S at a voltage V3, where S is 5 to 30%.
Further, in the above battery system for an electric vehicle, the master battery pack and the slave battery packs may be of the same type or of different types.
Further, in the battery system for an electric vehicle, the master battery pack is a power type battery, and the slave battery pack is a capacity type battery.
The application also provides a use method of the battery system for the electric vehicle, the main battery pack and the auxiliary battery packs have different working voltage ranges, and the auxiliary battery packs are discharged before the main battery pack in the application.
Further, in the method, the working voltage range of the master battery pack is V1-V2, and the working voltage range of the slave battery pack is V3-V2, then V1 is less than V3; the working voltage ranges of the master battery pack and the slave battery pack are both within the working voltage range of the electric automobile; when the main battery pack is at a voltage V3, after the discharge of the auxiliary battery pack is finished, the main battery pack still has the electric quantity not lower than S, and the S is 5-30%.
Further, in the method, when the method is applied to the electric vehicle, the main battery pack and the auxiliary battery pack are connected in parallel and are discharged simultaneously, when the discharge voltage of the auxiliary battery pack reaches V3, the discharging is finished, at the moment, the main battery pack still has 5-30% of electric quantity, the electric vehicle can still be kept to run for a certain distance, and at the moment, a driver can be reminded to replace or charge the electric vehicle in time.
Further, in the method, when the master battery pack and the slave battery pack are fixed on the electric vehicle for charging application, the two sets of battery packs can be charged simultaneously, the charging voltage reaches V2, the charging voltage range is not exceeded, and the two sets of battery packs can be fully charged.
Further, in the method, the main battery pack and the slave battery pack both adopt lithium iron phosphate batteries, when the slave battery pack is used for replacing the battery, the newly replaced slave battery pack is in a full-charge state after discharging is finished, the lithium iron phosphate batteries are placed after being fully charged, and the voltage of the lithium iron phosphate batteries is quickly reduced from 3.6V to about 3.4V; at the moment, even though the discharging of the main battery pack is finished during the battery replacement, the voltage of the lithium iron phosphate battery can be quickly recovered to about 3.2V from 2.5V after the discharging of the lithium iron phosphate battery is finished, so that the voltage of a single battery of the main battery pack is about 3.2V during the battery replacement, the voltage of a single battery of the auxiliary battery pack is about 3.4V, and the total voltage of the two sets of battery packs has different differences due to different battery strings in the two sets of batteries, so that the auxiliary battery pack can charge the main battery pack slowly, and the use of the electric automobile is not influenced.
The application has the following technical effects and advantages:
1. compared with the traditional charging or battery replacement electric automobile, the reliability of the electric automobile application is improved by two sets of battery systems;
2. the main battery pack and the slave battery pack have different working voltage ranges, and the main battery pack discharges electricity earlier than the slave battery pack in application, so that the problem that the remaining mileage of the electric automobile is inaccurate when the charged quantity of one battery pack is low is solved, the vehicle is prevented from being anchored, and a driver is reminded to charge or replace the battery in time;
3. the battery charging device can be suitable for two applications of charging and battery replacement;
4. in the battery replacement application, the slave battery pack is used as a battery pack for battery replacement, the capacity is high, and the battery replacement application has higher energy efficiency;
5. as the battery replacement application, the main battery pack does not need to be specially charged, and the auxiliary battery pack can automatically charge the main battery pack in the running or parking process of the vehicle.
Drawings
Fig. 1 is a schematic view of a battery system for an electric vehicle according to the present invention.
Detailed Description
The above-described scheme is further illustrated below with reference to specific examples. It should be understood that these examples are for illustrative purposes and are not intended to limit the scope of the present application. The conditions used in the examples may be further adjusted according to the conditions of the particular manufacturer, and the conditions not specified are generally the conditions in routine experiments.
In the drawing, 1 denotes an electric vehicle, 2 denotes a master battery pack (master battery system), and 3 denotes a slave battery pack (slave battery system).
Example 1
The application provides a compromise battery system for electric automobile that charges and trade electric usefulness. The electric vehicle 1 comprises two battery systems applied in parallel, one of which is a master battery pack 2 and the other of which is a slave battery pack 3.
The main battery pack 2 is fixed on the vehicle for application, and the auxiliary battery pack 3 can be fixed on the vehicle for application and can also be used as a battery replacement pack for application. The master battery pack 2 charge is no greater than the slave battery pack charge 3.
The main battery pack 2 and the auxiliary battery pack 3 have different working voltage ranges, the working voltage range of the main battery pack 2 is V1-V2, the working voltage range of the auxiliary battery pack 3 is V3-V2, and V1 is smaller than V3. The working voltage ranges of the master battery pack 2 and the slave battery pack 3 are within the working voltage range of the electric automobile. At the voltage V3 of the master battery pack 2, i.e. after the discharge from the battery pack 3 is finished, the master battery pack 2 still has an amount of electricity not less than S, typically 5-30%.
The master battery pack 2 and the slave battery pack 3 may be the same type of battery or different types of batteries. Typically, the master battery pack 2 is a power type battery, and the slave battery pack 3 is a capacity type battery. In this practical example, the lithium iron phosphate batteries are used as the master battery pack and the slave battery pack.
For example, the working voltage range of the motor of the electric automobile is 230-400V. The lithium iron phosphate battery pack is configured from the battery pack 3 into 100 strings, and the normal operating voltage range of the lithium iron phosphate battery pack is 250V-360V, namely V3=250 and V2=360. The battery is a capacity type battery, the capacity of the battery pack is high, and the requirement of long driving range of the electric automobile can be met.
The main battery pack 2 adopts a power type lithium iron phosphate battery, has low capacity, but can meet the power requirement of the electric automobile. The working voltage of the lithium iron phosphate single battery is 2.5-3.8V, the lithium iron phosphate single battery can be nearly fully charged between 3.5-3.8V during charging, and the conventional charging voltage is 3.6V. The number of the main battery pack strings can be selected as follows: v2/3.8=360/3.8=94.7, 95 strings may be selected. V3=95 × 2.5=237.5V, all within the operating voltage range of the motor.
When the battery pack is applied to an electric vehicle, the main battery pack 2 and the auxiliary battery pack 3 are connected in parallel and discharge at the same time, when the discharge voltage of the auxiliary battery pack 3 reaches 250V, the discharge is finished, at the moment, 5-10% of electric quantity of the main battery pack 2 still exists, the electric vehicle can still be maintained for a certain distance to run, and at the moment, a driver can be reminded of replacing or charging the battery in time.
When the master battery pack and the slave battery pack are fixed on the electric vehicle for charging application, the two sets of battery packs can be charged simultaneously, the charging voltage reaches 360V, the charging voltage range is not exceeded, and the two sets of battery packs can be fully charged.
When the slave battery pack 3 is used for replacing the battery, the newly replaced slave battery pack 3 is in a full-charge state after the discharge is finished, and the voltage of the lithium iron phosphate battery is quickly reduced from 3.6V to about 3.4V when the lithium iron phosphate battery is placed after being fully charged; at this time, even if the discharge of the main battery pack 2 is finished during the battery replacement, the voltage of the lithium iron phosphate battery is usually quickly recovered from 2.5V to about 3.2V after the discharge of the lithium iron phosphate battery is finished. Therefore, the voltage of the main battery pack 2 is about 320V when the batteries are replaced, the voltage of the auxiliary battery pack 3 is about 3.4 × 95=323v, the voltage difference between the two sets of battery packs is not large, the auxiliary battery pack 3 can charge the main battery pack 2 slowly, and the use of the electric automobile is not influenced.
Example 2
Still as described in example 1, the electric vehicle motor operates in the range of 230-400V. The lithium iron phosphate battery pack is configured from the battery pack 3 into a 100-string battery pack, and the normal operating voltage range of the lithium iron phosphate battery pack is 250V-360V, i.e., V3=250 and V2=360. The battery is a capacity type battery, the capacity of the battery pack is high, and the requirement of long driving range of the electric automobile can be met.
The main battery pack 2 adopts a power type nickel-metal hydride battery. The working voltage of the nickel-metal hydride battery is 1.. 0-1.5V. The transmission of the nickel-metal hydride battery adopted by the main battery pack is as follows:
v2/1.5=360/1.5=240, i.e., 240 nickel-metal hydride batteries are connected in series. V1=1.0 × 240=240v, within the motor operating voltage range. When the voltage of the battery pack is V3, the average voltage of the nickel-metal hydride battery is 250/240=1.041V, and the residual capacity of the battery pack is still 5-10%.
Both the master battery pack 2 and the slave battery pack 3 can be charged normally when they are fixed to the electric vehicle 1 for charging. When the slave battery pack 3 is used as a battery replacement pack, the slave battery pack can still charge the main battery pack after battery replacement without influencing the normal use of the electric automobile.
Compared with the traditional charging or battery replacement electric automobile, the two sets of battery systems improve the application reliability of the electric automobile; the problem that the remaining mileage of the electric automobile is inaccurate when the charged quantity of a battery pack is low is solved, the vehicle is prevented from being anchored, and a driver is reminded to charge or replace the battery in time; can be suitable for two applications of charging and battery replacement.
The above description is only for the specific embodiments of the present application, but the scope of the present application is not limited thereto, and any person skilled in the art can easily think of the changes or substitutions within the technical scope of the present application, and shall be covered by the scope of the present application.
Claims (9)
1. A battery system for an electric vehicle is characterized by comprising two sets of battery packs, wherein one set of battery pack is used as a main battery pack, has low electric quantity and is fixed on a vehicle; the other set of battery pack is used as a slave battery pack which has higher electric quantity, the slave battery pack is fixed on the electric vehicle for application or used as a battery replacement pack, and the master battery pack and the slave battery pack are connected in parallel.
2. The battery system for electric vehicles according to claim 1, wherein the operating voltage range of the master battery pack is V1 to V2, and the operating voltage range of the slave battery pack is V3 to V2, then V1< V3; the working voltage ranges of the master battery pack and the slave battery packs are within the working voltage range of the electric vehicle.
3. The battery system for electric vehicles according to claim 2, wherein the main battery pack still has a remaining capacity of not less than S at a voltage of V3, S being 5-30%.
4. A battery system for an electric vehicle as claimed in claim 3, wherein the master battery pack and the slave battery packs are the same type of battery or different types of batteries.
5. The battery system for electric vehicles according to claim 4, wherein the master battery pack is a power type battery, and the slave battery pack is a capacity type battery.
6. A method of using a battery system for electric vehicles as claimed in claim 1, wherein the master battery pack and the slave battery packs have different operating voltage ranges, and wherein the master battery pack is discharged before the slave battery packs.
7. The method of claim 6, wherein the master battery pack has an operating voltage range of V1 to V2, and the slave battery pack has an operating voltage range of V3 to V2, where V1< V3; the working voltage ranges of the master battery pack and the slave battery packs are within the working voltage range of the electric automobile; when the main battery pack is at a voltage V3, after the discharge of the auxiliary battery pack is finished, the main battery pack still has the electric quantity not lower than S, and the S is 5-30%.
8. The method of claim 7, wherein when the master and slave battery packs are both used as batteries fixed on the electric vehicle, the two battery packs can be charged simultaneously, and when the charging voltage reaches V2, the charging voltage does not exceed the charging voltage range and the two battery packs can be fully charged.
9. The method as claimed in claim 7, wherein when the slave battery packs are used for replacing batteries, the newly replaced slave battery packs are in a full-charge state after the discharge is finished, and even if the discharge of the master battery pack is finished, the voltage of the left battery pack drops after the charging of the battery is finished, and the voltage of the left battery pack rises after the discharge is finished, so that the total voltage of the two sets of battery packs has little difference, and the slave battery packs can charge the master battery pack by themselves slowly in the vehicle application without influencing the use of the electric vehicle.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110400128.7A CN115214384A (en) | 2021-04-14 | 2021-04-14 | Battery system for electric vehicle and using method thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110400128.7A CN115214384A (en) | 2021-04-14 | 2021-04-14 | Battery system for electric vehicle and using method thereof |
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| CN115214384A true CN115214384A (en) | 2022-10-21 |
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| CN109703385A (en) * | 2019-01-31 | 2019-05-03 | 深圳创新黑科技有限公司 | The reserved electric car for increasing journey rechargeable battery position |
| CN214523361U (en) * | 2021-04-14 | 2021-10-29 | 上海比耐信息科技有限公司 | Battery system for electric vehicle |
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2021
- 2021-04-14 CN CN202110400128.7A patent/CN115214384A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN204279128U (en) * | 2014-10-17 | 2015-04-22 | 上虞安卡拖车配件有限公司 | A kind of electronlmobil with two cover power supply modules |
| CN106114257A (en) * | 2016-07-06 | 2016-11-16 | 北京新能源汽车股份有限公司 | A kind of battery system and control method |
| US20180154794A1 (en) * | 2016-12-06 | 2018-06-07 | National Chung Shan Institute Of Science And Technology | Range extending apparatus for electric vehicle and control method thereof |
| CN107444176A (en) * | 2017-08-31 | 2017-12-08 | 西安特锐德智能充电科技有限公司 | The electrokinetic cell system of charging and conversion electric one and method of work and its application |
| GB201900007D0 (en) * | 2018-01-04 | 2019-02-13 | Dar Yun Energy Science Tech Co Ltd | Charging method for stably charging battery and extending power supply period for electric vehicle |
| CN108688502A (en) * | 2018-06-11 | 2018-10-23 | 安徽知之信息科技有限公司 | A kind of charging unit of new-energy automobile |
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| CN214523361U (en) * | 2021-04-14 | 2021-10-29 | 上海比耐信息科技有限公司 | Battery system for electric vehicle |
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