CN111152668A - Dual hybrid battery pack suitable for motor driving apparatus - Google Patents
Dual hybrid battery pack suitable for motor driving apparatus Download PDFInfo
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- CN111152668A CN111152668A CN202010018355.9A CN202010018355A CN111152668A CN 111152668 A CN111152668 A CN 111152668A CN 202010018355 A CN202010018355 A CN 202010018355A CN 111152668 A CN111152668 A CN 111152668A
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- battery pack
- hybrid
- battery
- motor
- hybrid battery
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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
-
- 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
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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
Abstract
The invention relates to a dual hybrid battery pack suitable for motor driving equipment, and belongs to the technical field of hybrid batteries. The invention comprises a hybrid battery pack, a secondary battery pack, a battery pack management system PMS and a battery management system BMS, wherein: a hybrid battery pack including two or more hybrid batteries, each of the hybrid batteries including a secondary battery and a storage battery; the secondary battery is an energy storage device consisting of a plurality of battery packs, and each battery pack consists of a plurality of battery cores; a secondary battery pack including two or more secondary batteries; the hybrid battery pack and the secondary battery pack are connected in parallel; a battery management system PMS and a battery management system BMS for controlling so that only the electricity of the hybrid battery pack is used when the motor is started and the electricity of the secondary battery pack is used when driving. The invention can greatly improve the multiplying power performance of the battery to shorten the charging time, and can greatly reduce the battery capacity compared with the capacity required by the motor.
Description
Technical Field
The invention relates to a dual hybrid battery pack suitable for motor driving equipment, and belongs to the technical field of hybrid batteries.
Background
In general, motor-driven apparatuses include electric vehicles that use a high-voltage battery as a power source to supply power for driving and also as an auxiliary battery for internal electrical loads. At this time, under the control of the upper controller, a Low voltage DC Converter (LDC) connected to the auxiliary battery and the electric device lowers the high voltage of the high voltage battery to a charging voltage (down) of the auxiliary battery and charges the auxiliary battery when the voltage of the auxiliary battery does not exceed a reference value. The auxiliary battery functions to supply operating power to electrical devices such as vehicle starting, various lamps, systems, and Electronic Control Units (ECUs).
Up to now, the auxiliary battery of the vehicle has mainly taken a lead-acid storage battery (lead-acid storage battery) since it can be recharged and reused after being completely discharged, but the lead-acid storage battery has a heavy weight and a low charge density, and has been gradually replaced by a 12V lithium ion battery (lithium battery) in terms of environmentally friendly vehicles since lead-acid is an environmentally polluting substance. However, the 12V lithium ion battery has a disadvantage that a recharging efficiency is lowered when it is over-discharged, which is fatal to the battery, and a technology for preventing the 12V lithium ion battery using a relay for preventing over-discharge has been continuously developed in order to remedy the disadvantage.
The conventional charging control method for the auxiliary battery in the electric vehicle is as follows: at the time point (T1) when the charging of the high-voltage battery is started by the external power source (external power source), the charging of the auxiliary battery is also started, and the charging of the auxiliary battery is completed at the time point T2. At this time, the charging of the high-voltage battery cannot be completed until time T3, and therefore, the low-voltage dc converter (LDC) needs to perform high-voltage control from the time when the charging of the auxiliary battery is completed (T2) to the time when the charging of the high-voltage battery is completed (T3). That is, the low-Voltage dc converter controls to maintain the State of charge (SOC) of the auxiliary battery by outputting a Voltage corresponding to 13.6V, which is an Open Circuit Voltage (OCV) at which the State of charge (SOC) of the auxiliary battery is 95%, so as to prevent the auxiliary battery from being charged/discharged, and at this time, the high output Voltage of the low-Voltage dc converter increases a loss due to a resistive load and decreases the charging efficiency.
The existing charging control technology of the auxiliary battery of the electric vehicle has the following problems: in order to maintain the fully charged state of the auxiliary battery until the charging of the high-voltage battery is completed, it is necessary to use a high output voltage of the low-voltage dc converter, which causes a large loss due to a resistive load, and thus lowers the charging efficiency of the high-voltage battery.
Disclosure of Invention
In view of the above-mentioned drawbacks of the prior art, the present invention provides a dual hybrid battery pack suitable for a motor driving device, which can greatly improve the rate capability of a battery to shorten the charging time, and greatly reduce the battery capacity compared to the capacity required by a motor.
The dual hybrid battery pack suitable for a motor driving device according to the present invention includes a hybrid battery pack, a secondary battery pack, a battery management system PMS, and a battery management system BMS, wherein:
the hybrid battery pack is used for supplying power to the motor when the motor is started and consists of more than two hybrid batteries, and each hybrid battery is formed by combining a secondary battery and a storage battery;
the secondary battery is an energy storage device consisting of a plurality of battery packs, and each battery pack consists of a plurality of battery cores;
a storage battery for initial starting of a starting rapid charge/discharge of the large torque motor, which is a means for storing electric capacity as electric potential energy;
a secondary battery pack for supplying power to the motor when the vehicle is driven, the secondary battery pack being composed of two or more secondary batteries;
the hybrid battery pack and the secondary battery pack are connected in parallel;
a battery management system PMS and a battery management system BMS for controlling so that only the electricity of the hybrid battery pack is used when the motor is started and the electricity of the secondary battery pack is used when driving.
Preferably, the double hybrid battery pack is a hybrid battery pack in which secondary batteries and an electric storage device are combined to form a first hybrid, and a hybrid battery pack in which two or more hybrid batteries are combined is combined with a secondary battery pack in which two or more remaining secondary batteries are combined to realize a second hybrid.
Preferably, the dual hybrid battery pack has electrical characteristics of high output, high-rate charge, and high rate performance, and the battery rate performance is a ratio of rapid charge and discharge.
Preferably, the inlet and outlet through which the accumulator charges and discharges electric energy is 30 times or more wider than the secondary battery.
Preferably, the battery cell is a lithium ion battery.
Preferably, the number of hybrid battery packs is selected according to the initial starting torque requirements of the different motors.
Preferably, the distribution ratio between the hybrid battery pack and the secondary battery pack is selected according to the requirements of different vehicle types.
Preferably, the distribution ratio between the hybrid battery pack and the secondary battery pack is 50: 50.
The invention has the beneficial effects that: the dual hybrid battery pack for a motor driving device according to the present invention is a hybrid battery pack in which a secondary battery and a capacitor are first mixed and the hybrid battery pack and the secondary battery pack are second mixed to exhibit high-output and high-rate performance electrical characteristics of high-speed charging and to greatly improve safety and lifespan; the secondary battery pack is used when driving while only using electricity of the hybrid battery pack when starting the motor, so that the number of parts and the production cost can be reduced by eliminating an additional capacitor for starting the motor, and the total capacity of the battery can be reduced by eliminating the additional capacitor for starting the motor.
Drawings
Fig. 1 is a configuration diagram of embodiment 1 of the present invention.
Fig. 2 is a schematic diagram of the charging/discharging system of the present invention.
Fig. 3 is a graph comparing the performance of the present invention with that of a conventional electric vehicle battery pack.
Fig. 4 is a configuration diagram of embodiment 2 of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example 1:
as shown in fig. 1, the hybrid battery of the present invention includes a secondary battery and an electric storage device. That is, the present invention discloses a dual hybrid battery pack suitable for a motor-driven device, which combines a secondary battery with an accumulator to make a hybrid battery and combines the hybrid battery pack including the hybrid battery and the secondary battery pack to realize a second mixing.
The secondary battery is a device that converts external electric energy into chemical energy, stores the chemical energy, and generates electricity when necessary. That is, since charging can be performed a plurality of times, it is also referred to as a "rechargeable battery". One of the characteristics of the secondary battery is that the number of inlets and outlets for charging and discharging electric energy is small and the energy storage container for storing the electric energy is large. Therefore, it takes a long time to charge and discharge, but its purpose is to store electric energy for use. The secondary battery of the present invention may be an energy storage device constituted by a plurality of battery packs. The battery pack may be constructed of a plurality of battery cells (battery cells), including lithium ion batteries.
The accumulator is a device that stores electric capacity as potential energy, and can be charged/discharged quickly although its storage capacity is small. Therefore, it is used for motor starting purposes where the initial starting torque is very large. That is, the inlet and outlet through which the accumulator charges and discharges electric energy is 30 times or more wider than the secondary battery. Therefore, the time required for charging and discharging is short, and the motor is very suitable for temporary use after temporary storage.
In one aspect, a hybrid battery pack, which is one component of the present invention, is a hybrid battery pack that combines advantages of the secondary battery and the capacitor. The hybrid battery pack can exert the following effects: rapid charging/discharging, reduction of additional cost for additional temperature management, capability of air transportation by shipping in a completely discharged state at the initial shipment, increase in life, and the like.
On the other hand, according to the present invention, a hybrid battery Pack (Pack) in which the plurality of hybrid batteries are combined and a secondary battery Pack are combined to realize the second mixing. That is, the present invention discloses a dual hybrid battery pack suitable for a motor-driven device, in which the hybrid battery pack for the first mixing and a general secondary battery pack are combined to realize the second mixing.
A schematic diagram of the charging/discharging system of the dual hybrid battery pack of the present invention for use in a motor-driven device is shown in conjunction with fig. 2. In the present invention, the charging/discharging is controlled by a Battery Management System (PMS) and a Battery Management System (BMS), and the hybrid Battery pack is connected in series with the secondary Battery pack. The hybrid battery pack and the secondary battery pack are connected in series to form a battery pack capable of satisfying a total voltage, and a phase difference problem caused by combination of two battery currents does not occur due to direct current, so that mixing is realized.
In addition, in order to maximize the advantages of both batteries, the charge and discharge circuit is designed such that the secondary battery pack (lithium ion battery) is operated by the battery Pack Management System (PMS) and the Battery Management System (BMS) so as to use only the electricity of the hybrid battery pack when starting the motor and to use the electricity of the hybrid battery pack when driving, thereby reducing the number of parts and the manufacturing cost by eliminating an additional capacitor for starting the motor. Also, an additional capacitor for starting the motor can be eliminated and the total capacity of the battery can be reduced. This is because the effect obtained by the high-rate performance charge/discharge can be achieved.
In particular, the distribution of the two batteries (baowei and secondary battery) may be 50:50, or may be designed to be a desired distribution according to various types of vehicles.
Example 2:
as shown in fig. 3, when the performance of the conventional electric vehicle battery pack and the electric vehicle battery pack of the present invention is compared, and the calculation is performed based on 400km which can be driven after the 60kW lithium ion battery is charged by 80%, the following calculation can be performed:
1. charging for 5 minutes:
i) 2 battery packs for connecting 30kW lithium ion batteries of the existing electric vehicle;
the vehicle can run for 33km by charging at 60kW × 1/12(5 minutes) × 80% ═ 4 kWh.
ii) the 30kW cell of the invention was compared to 15kW baoweli (energy density 1/2; the volume is the same as that of the lithium ion battery, and the capacity is halved) 2 battery packs connected with each other;
141km was allowed to travel with a 30kW × 1/12(5 minutes) × 80% +15kW ═ 17kWh charge.
2. Charging for 10 minutes:
i) 2 battery packs for connecting 30kW lithium ion batteries of the existing electric vehicle;
the vehicle can run for 66km by charging at 60kW × 1/6(10 minutes) × 80% ═ 8 kWh.
ii) the 30kW cell of the invention was compared to 15kW baoweli (energy density 1/2; the volume is the same as that of the lithium ion battery, and the capacity is halved) 2 battery packs connected with each other;
the vehicle can run 158km by charging with 30kW × 1/6(10 minutes) × 80% +15kW ═ 19 kWh.
3. Charging for more than 1 hour:
i) 2 battery packs for connecting 30kW lithium ion batteries of the existing electric vehicle;
the vehicle can run for 400km by charging with 60kW multiplied by 80% and 48 kWh.
ii) the 30kW battery of the invention was compared with 15kW for baoweli (energy density 1/2; the volume is the same as that of the lithium ion battery, and the capacity is halved) 2 battery packs connected with each other;
the vehicle can run for 325km by charging with 30kW multiplied by 80% +15kW which is 39 kWh.
As described above, the conventional electric vehicle battery pack can travel 400km after being charged for 1 hour or more, and the hybrid battery pack of the present invention can travel 325km, thereby reducing the travel distance by 75 km.
But the present invention can travel 158km with only 10 minutes of charging to use the electric vehicle by a rapid charging at a critical time and also exhibits excellent advantages in terms of life span. That is, the dual hybrid battery pack of the present invention, which is applied to a device driven by a motor, can greatly shorten the charging time and improve the battery rate performance.
Example 3:
this embodiment provides a technical solution that can be applied after two batteries are connected in parallel. Fig. 4 is a configuration diagram showing a parallel embodiment of a dual hybrid battery pack suitable for a motor-driven apparatus according to an embodiment of the present invention.
As shown in fig. 4, when different types of battery packs are connected in parallel and used, the battery packs can be used with a capacity of 300V × 150A. In this case, as described above, the rate capability can be greatly improved by the high-speed charging in a short time.
In addition, the present invention may use the hybrid battery pack when the motor is started in a parallel state (at the time of departure) and use only the lithium ion secondary battery pack or use both the lithium ion secondary battery pack and the hybrid battery pack during running. Therefore, the battery life can be increased and the battery capacity can be greatly reduced compared to the required capacity of the motor.
The dual hybrid battery pack for a motor driving device according to the present invention is a hybrid battery pack in which a secondary battery and a capacitor are first mixed and the hybrid battery pack and the secondary battery pack are second mixed to exhibit high-output and high-rate performance electrical characteristics of high-speed charging and to greatly improve safety and lifespan; the secondary battery pack is used when driving while only using electricity of the hybrid battery pack when starting the motor, so that the number of parts and the production cost can be reduced by eliminating an additional capacitor for starting the motor, and the total capacity of the battery can be reduced by eliminating the additional capacitor for starting the motor.
The dual hybrid battery pack according to the present invention, which is applied to a motor-driven device, can be applied not only to electric vehicles such as electric vehicles, electric bicycles, hybrid electric vehicles, plug-in hybrid electric vehicles, and electric locomotives, but also to various devices driven by an electric motor such as unmanned aerial vehicles and industrial machines.
It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (8)
1. A dual hybrid battery pack adapted for a motor driving apparatus, comprising a hybrid battery pack, a secondary battery pack, a battery management system PMS, and a battery management system BMS, wherein:
the hybrid battery pack is used for supplying power to the motor when the motor is started and consists of more than two hybrid batteries, and each hybrid battery is formed by combining a secondary battery and a storage battery;
the secondary battery is an energy storage device consisting of a plurality of battery packs, and each battery pack consists of a plurality of battery cores;
a storage battery for initial starting of a starting rapid charge/discharge of the large torque motor, which is a means for storing electric capacity as electric potential energy;
a secondary battery pack for supplying power to the motor when the vehicle is driven, the secondary battery pack being composed of two or more secondary batteries;
the hybrid battery pack and the secondary battery pack are connected in parallel;
a battery management system PMS and a battery management system BMS for controlling so that only the electricity of the hybrid battery pack is used when the motor is started and the electricity of the secondary battery pack is used when driving.
2. A dual hybrid battery pack suitable for a motor drive apparatus according to claim 1, wherein the dual hybrid battery pack is a hybrid battery pack in which secondary batteries and an accumulator are combined to make a first mixing, and a hybrid battery pack in which two or more hybrid batteries are combined is combined with a secondary battery pack in which two or more remaining secondary batteries are combined to achieve a second mixing.
3. The dual hybrid battery pack for a motor driving device according to claim 2, wherein the dual hybrid battery pack has electrical characteristics of high output, high-speed charge, and high rate performance, and the battery rate performance is a ratio of rapid charge and discharge.
4. The dual hybrid battery pack for a motor driving device according to claim 1, wherein the inlet and outlet through which the accumulator charges and discharges the electric energy is wider than the secondary battery by more than 30 times.
5. The dual hybrid battery pack suitable for a motor driving device according to claim 1, wherein the battery cells are lithium ion batteries.
6. A dual hybrid battery pack suitable for use in a motor drive apparatus according to claim 1, wherein the number of hybrid battery packs is selected in accordance with the initial starting torque requirements of different motors.
7. The dual hybrid battery pack for a motor driving device according to claim 1, wherein the distribution ratio between the hybrid battery pack and the secondary battery pack is selected according to the requirements of different vehicle types.
8. The dual hybrid battery pack suitable for a motor driving device according to claim 7, wherein a distribution ratio between the hybrid battery pack and the secondary battery pack is 50: 50.
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2020
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Patent Citations (6)
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| CN201472180U (en) * | 2009-09-01 | 2010-05-19 | 高钟声 | Electric automobile with intelligent power generation charging device |
| CN102959827A (en) * | 2010-06-28 | 2013-03-06 | 日立车辆能源株式会社 | Power storage unit control circuit and power storage apparatus |
| US20130041538A1 (en) * | 2011-08-12 | 2013-02-14 | Johnson Controls Technology Llc | System and method for energy prediction in battery packs |
| CN103072488A (en) * | 2013-01-31 | 2013-05-01 | 郑州宇通客车股份有限公司 | Composite power source |
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