阅读说明：本技术 一种可支持直流充电国标的电动汽车充电宝 (Can support direct current national standard's that charges electric automobile treasured that charges ) 是由 彭建华 潘继雄 周幼华 于 2021-07-05 设计创作，主要内容包括：本发明涉及电动汽车充电技术领域,公开了一种可支持直流充电国标的电动汽车充电宝,解决了目前市面上电动汽车充电宝所存在的对车载动力电池充电电流小,充电时间长,自身补电时间也长,以及和2015版直流充电国标接口不匹配的问题,可作为电动汽车充电桩功能的延伸和扩展,兼容2015版国标充电通信协议,可以直接利用随车携带的直流充电枪及连接电缆对电动汽车进行插枪快充,同时充电宝也支持户外直流充电桩和交流充电桩对其自身进行插枪补电,还可以实现户外直流充电桩对电动汽车和充电宝“一枪两充”的双充模式,做到一次性充满两台设备,彻底解决了电动汽车在行驶途中充电难、充电慢、充电不便的弊端,具备较高的市场推广价值。(The invention relates to the technical field of electric vehicle charging, and discloses an electric vehicle charging bank capable of supporting a direct-current charging national standard, which solves the problems that the charging current of a vehicle-mounted power battery is small, the charging time is long, the self-charging time is also long, and the charging bank is not matched with a 2015-version direct-current charging national standard interface in the existing electric vehicle charging bank in the market Slow, the inconvenient drawback of charging, possess higher market spreading value.)

1. The electric automobile charger capable of supporting the direct-current charging national standard is characterized by comprising a lithium iron phosphate battery pack, a Battery Management System (BMS), a bidirectional DC/DC (direct current/direct current) isolation conversion power supply, a switch switching unit, a rectifying unit, a direct-current charging interface seat, a direct-current power supply interface seat, an alternating-current charging interface seat, a touch screen, an AC (alternating current) inverter power supply, a DC conversion power supply, a 12Vdc direct-current output interface, a Type-C output interface, a USB-A (universal serial bus-analog) output interface and an AC alternating-current output interface, wherein the bidirectional DC/DC isolation conversion power supply, the switch switching unit and the lithium iron phosphate battery pack are sequentially and electrically connected in series, the direct-current charging interface seat and the direct-current power supply interface seat are respectively and electrically connected with the switch switching unit, and the alternating-current charging interface seat, The rectifying unit and the bidirectional DC/DC isolated conversion power supply are sequentially connected in series and electrically, the AC inverter power supply and the DC conversion power supply are respectively connected with the lithium iron phosphate battery pack, the 12Vdc direct current output interface, the Type-C output interface and the USB-A output interface are respectively electrically connected with the DC conversion power supply, the AC alternating current output interface is electrically connected with the AC inverter power supply, the Battery Management System (BMS) is electrically connected with the lithium iron phosphate battery pack, the Battery Management System (BMS) is respectively connected with the bidirectional DC/DC isolation conversion power supply and the switch switching unit in a communication way through a CAN bus, the Battery Management System (BMS) respectively controls the switching action between the voltage boosting and the voltage reducing of the bidirectional DC/DC isolation conversion power supply and the switching action of the switch switching unit, and the touch screen is electrically connected with the Battery Management System (BMS).

2. The national standard electric vehicle charger capable of supporting direct-current charging according to claim 1, wherein the lithium iron phosphate battery pack comprises 16 strings of high-rate monomer cells, the rated capacity of each high-rate monomer cell is 100Ah, and the 16 strings of high-rate monomer cells are all electrically connected in series.

3. The national standard electric vehicle charger capable of supporting direct current charging according to claim 1, wherein the rated voltage of the lithium iron phosphate battery pack is 51.2V, the rated capacity of the lithium iron phosphate battery pack is 100Ah, and the total charge of the lithium iron phosphate battery pack is 5.12 KWh.

4. The national standard electric vehicle treasured that charges that can support direct current charging of claim 1, characterized by, the total power of two-way DC/DC isolation transform power is 5KW, and the output voltage range of stepping up is 200 Vdc-750 Vdc.

5. The national standard electric vehicle charger capable of supporting direct current charging according to claim 1, wherein the output power of the 12Vdc direct current output interface is 13.6 Vdc/10A.

6. The national standard electric vehicle charger capable of supporting direct current charging according to claim 1, wherein the output power of the AC output interface is 500W.

Technical Field

The invention relates to the technical field of electric automobile charging, in particular to a national standard electric automobile charger capable of supporting direct current charging.

Background

Although most of electric vehicles support the fast charging mode of the direct-current charging pile and the slow charging mode of the alternating-current charging pile, the charging places are fixed, and the charging places are generally in a cell parking lot, an office building parking lot and a special charging and replacing station, so that the embarrassing situations are inevitably caused: the electric automobile running in a remote area or a suburb of a rural area is difficult to support the residual electric quantity to run to a charging and replacing station; the residual electric quantity of the electric automobile running on the highway is difficult to support and run to the next service area provided with the charging pile; due to the long charging time, charging stations often need to wait in a queue for charging; and charging piles are not set in the residential area for charging. Once the electric automobile enters an electricity shortage state and cannot be timely supplemented, a 'groveling' occurs due to the exhaustion of electric energy, and the electric automobile is forced to wait for trailer rescue service in situ, so that the use cost of a user is undoubtedly increased, and the driving experience of the user is seriously influenced.

Similar to the mobile phone, the mobile phone charging device is born in order to prolong the standby power time, the electric vehicle has limited cruising mileage, and the electric vehicle charging device can be transported under the background in order to solve the embarrassment problem of the last 1 kilometer. The electric automobile treasured that charges can carry the trip along with the car, and convenient to use belongs to car stand-by power supply, can fill the extension and the extension of stake function as electric automobile, remedies the shortcoming that fills electric pile can not move, is the difficult effective way of automobile charging in solving and traveling.

At present, many domestic research institutes and scholars respectively provide various electric architectures and proposals for automobile charging treasures, for example, the patent CN209298938U divides the automobile charging treasures into an automobile base and a battery energy block, the automobile base is connected to a high-voltage box, and has a bidirectional DC/DC power conversion function, so that low voltage electricity of the battery energy block can be converted into high voltage electricity to charge an automobile-mounted power battery, but the charging current is only 15A; in the patent CN106992585A, alternating current charging and direct current charging of the vehicle-mounted power battery by the vehicle charger are realized by using the bidirectional AC/DC power conversion module and the bidirectional DC/DC power conversion module, and power supplement of the external alternating current mains supply to the vehicle charger is realized; the precious electrical structure of car that patent CN106208249B provided is used comparatively generally, divide into the subassembly that charges, battery pack and output assembly, and the subassembly that charges supports external interchange commercial power and charges battery pack, and battery pack stores energy as stand-by power supply, and output assembly charges to on-vehicle power battery after promoting battery pack voltage. However, the charger proposed by the above patent generally has the problems of small charging current, long charging time for the vehicle-mounted power battery, long self-charging time, and mismatch with the national standard interface for dc charging of the electric vehicle.

Disclosure of Invention

The invention mainly aims to provide an electric vehicle charger capable of supporting a direct-current charging national standard, aiming at enabling the electric vehicle charger to be compatible with a direct-current charging interface on an electric vehicle, supporting 2015 version of the national standard charging communication protocol, performing direct-current quick charging on the electric vehicle, and simultaneously enabling a direct-current charging pile and a direct-current charging gun to perform quick charging on the electric vehicle, so that the defects of difficult charging, slow charging and inconvenient charging of the electric vehicle during driving are thoroughly solved, and the problem of anxiety mileage caused by limited driving mileage is thoroughly eliminated.

In order to achieve the above purpose, the electric vehicle charger capable of supporting the direct current charging national standard provided by the invention comprises a lithium iron phosphate battery pack, a Battery Management System (BMS), a bidirectional DC/DC isolated conversion power supply, a switch switching unit, a rectifying unit, a direct current charging interface seat, a direct current power supply interface seat, an alternating current charging interface seat, a touch screen, an AC inverter power supply, a DC conversion power supply, a 12Vdc direct current output interface, a Type-C output interface, a USB-A output interface and an AC alternating current output interface, wherein the bidirectional DC/DC isolated conversion power supply comprises a direct current boosting circuit and a direct current voltage reducing circuit, the bidirectional DC/DC isolated conversion power supply, the switch switching unit and the lithium iron phosphate battery pack are sequentially and electrically connected in series, the direct current charging interface seat and the direct current power supply interface seat are respectively and electrically connected with the switch switching unit, the alternating current charging interface seat, the rectifying unit and the bidirectional DC/DC isolation conversion power supply are sequentially and electrically connected in series, the AC inverter power supply and the DC conversion power supply are respectively and electrically connected with the lithium iron phosphate battery pack, the 12Vdc direct current output interface, the Type-C output interface and the USB-A output interface are respectively and electrically connected with the DC conversion power supply, the AC alternating current output interface is electrically connected with the AC inverter power supply, the Battery Management System (BMS) is electrically connected with the lithium iron phosphate battery pack, the Battery Management System (BMS) is respectively and communicatively connected with the bidirectional DC/DC isolation conversion power supply and the switch switching unit through a CAN bus, and the Battery Management System (BMS) respectively controls the switching action between the voltage boosting and the voltage reduction of the bidirectional DC/DC isolation conversion power supply and the switching action of the switch switching unit, the touch screen is electrically connected with the Battery Management System (BMS).

Optionally, the lithium iron phosphate battery pack comprises 16 high-rate monomer battery cells, the rated capacities of the high-rate monomer battery cells are all 100Ah, and the 16 high-rate monomer battery cells are all electrically connected in series.

Optionally, the rated voltage of the lithium iron phosphate battery pack is 51.2V, the rated capacity of the lithium iron phosphate battery pack is 100Ah, and the total electric quantity of the lithium iron phosphate battery pack is 5.12 KWh.

Optionally, the total power of the bidirectional DC/DC isolation conversion power supply is 5KW, and the boost output voltage range is 200 Vdc-750 Vdc.

Optionally, the output power of the 12Vdc direct current output interface is 13.6 Vdc/10A.

Optionally, the output power of the AC output interface is 500W.

By adopting the technical scheme of the invention, the invention has the following beneficial effects:

1. the electric vehicle charger is compatible with a direct current charging interface on an electric vehicle, supports a national standard charging communication protocol of 2015 edition, can directly utilize a direct current charging gun and a connecting cable to carry out gun insertion and quick charging on the electric vehicle, and simultaneously supports an outdoor direct current charging pile and an alternating current charging pile to carry out gun insertion and power supplement on the electric vehicle;

2. the electric vehicle charger baby provided by the invention supports a double charging mode that an outdoor direct current charging pile charges an electric vehicle and the charger baby in one gun and two charging modes, the electric vehicle is charged preferentially, and the charger baby is charged after the electric vehicle is charged fully, so that two devices can be charged at one time;

3. the electric automobile charger baby provided by the invention provides a 12Vdc direct current output interface function, and can provide emergency ignition service by using an automobile live wire carried on a vehicle;

4. the electric automobile charger baby provided by the invention provides a 220Vac alternating current output interface function, a Type-C output interface function and a USB-A output interface function, and supports the charging and power supply service for 3C digital equipment, portable audio and video equipment, electric tools and medium and small power alternating current electric equipment.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the structures shown in the drawings without creative efforts.

Fig. 1 is an external connection block diagram of an electric vehicle charger capable of supporting a dc charging national standard according to the present invention;

fig. 2 is an internal electrical architecture and an external connection diagram of an electric vehicle charger capable of supporting a dc charging national standard according to the present invention.

The implementation, functional features and advantages of the objects of the present invention will be further described with reference to the accompanying drawings.

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.

It should be noted that all the directional indicators (such as upper, lower, left, right, front and rear … …) in the embodiment of the present invention are only used to explain the relative position relationship between the components, the motion situation, etc. in a specific posture (as shown in the drawing), and if the specific posture is changed, the directional indicator is changed accordingly.

In addition, the technical solutions in the embodiments may be combined with each other, but must be based on the realization of the technical solutions by those skilled in the art, and when the technical solutions are contradictory or cannot be realized, such a combination should not be considered to exist, and is not within the protection scope of the present invention.

The invention provides an electric automobile charger capable of supporting direct-current charging national standard.

As shown in fig. 1 and 2, in an embodiment of the invention, the national standard electric vehicle charger capable of supporting direct current charging includes a lithium iron phosphate battery pack, a Battery Management System (BMS), a bidirectional DC/DC isolated conversion power supply, a switch switching unit, a rectifying unit, a DC charging interface holder, a DC power supply interface holder, an AC charging interface holder, a touch screen, an AC inverter power supply, a DC conversion power supply, a 12Vdc DC output interface, a Type-C output interface, a USB-a output interface, and an AC output interface, the bidirectional DC/DC isolated conversion power supply includes a DC step-up circuit and a DC step-down circuit, the bidirectional DC/DC isolated conversion power supply, the switch switching unit, and the lithium iron phosphate battery pack are sequentially and electrically connected in series, the DC charging interface holder and the DC power supply holder are respectively and electrically connected with the switch switching unit, the alternating current charging interface seat, the rectifying unit and the bidirectional DC/DC isolation conversion power supply are sequentially and electrically connected in series, the AC inverter power supply and the DC conversion power supply are respectively and electrically connected with the lithium iron phosphate battery pack, the 12Vdc direct current output interface, the Type-C output interface and the USB-A output interface are respectively and electrically connected with the DC conversion power supply, the AC alternating current output interface is electrically connected with the AC inverter power supply, the Battery Management System (BMS) is electrically connected with the lithium iron phosphate battery pack, the Battery Management System (BMS) is respectively and communicatively connected with the bidirectional DC/DC isolation conversion power supply and the switch switching unit through a CAN bus, and the Battery Management System (BMS) respectively controls the switching action between the voltage boosting and the voltage reduction of the bidirectional DC/DC isolation conversion power supply and the switching action of the switch switching unit, the touch screen is electrically connected with the Battery Management System (BMS).

Specifically, lithium iron phosphate group is for charging precious energy storage power for store the electric energy of external power source input, charge to electric automobile after the direct current transform, lithium iron phosphate group has that the temperature is specific good, long cycle life, the advantage that the security performance is high, relatively is fit for as the precious energy storage power that charges, considers weight and electric quantity in the book, lithium iron phosphate group selects 16 high power monomer electric cores that rated capacity is 100Ah to establish ties in groups, constitutes 51.2V/100Ah voltage/capacity specification's stand-by power supply, and total electric quantity 5.12KWh, multiplicable continuation of the journey mileage is about 40 kilometers.

Specifically, the bidirectional DC/DC isolation conversion power supply belongs to a nuclear power electrical component in a main charge-discharge loop of a charger, the total power is designed to be 5KW, the bidirectional DC/DC isolation conversion power supply consists of a direct-current boosting circuit and a direct-current voltage reduction circuit, the direct-current boosting circuit is used for boosting a voltage platform of an energy storage power supply of the charger to a working voltage platform of a power battery of an electric automobile, and the working voltage range of most of electric automobiles is met: 200 Vdc-750 Vdc; the DC voltage reduction circuit is used for reducing the voltage of the high-voltage power output by the outdoor DC charging pile and the AC charging pile into a working voltage platform of the power bank energy storage power supply, so that the power bank can be charged quickly, and the charging current can reach 100A at most.

Specifically, a Battery Management System (BMS) is a control kernel of the charger, and is mainly responsible for protecting driving and protecting navigation during the working process of the ferric phosphate lithium battery and preventing the battery from having harmful faults such as overcharge, overdischarge, over-temperature, overcurrent and short circuit, and the BMS is also responsible for the task of communicating with an electric automobile and an outdoor direct current charging pile, the BMS charging communication protocol is completely compatible with the regulation in GB/T27930-2015 communication protocol between an electric automobile non-vehicle-mounted conductive charger and the battery management system, the direct current quick charging of the charger to the electric automobile and the quick power supplement of the outdoor direct current charging pile to the charger are seamlessly realized, in addition, the BMS and a bidirectional DC/DC isolation conversion power supply and a switch switching unit respectively establish CAN bus communication, and the switching action between the voltage boosting and the voltage reducing of the bidirectional DC/DC isolation conversion power supply is controlled, executing a charging working flow and a discharging working flow of the charger; realize again that outdoor direct current fills electric pile and charges when charging treasured and electric automobile through control switch switching unit to preferentially charge electric automobile, switch over again after electric automobile is full of the electricity and charge treasured.

Specifically, the dc charging interface socket and the dc power supply interface socket provide charging control pilot signals CC1, CC2 and their detection functions, and satisfy the conductive charging national standard GB/T18487.1-2015 electric vehicle conductive charging system-part 1: general requirements "and" GB/T20234.3-2015 connection for conductive charging of electric vehicles — part 3: the specification in the dc charging interface belongs to a physical medium supporting dc protocol charging.

Specifically, the ac charging interface socket provides charging control pilot signals CC and CP and a detection function thereof, and meets the national conductive charging standard GB/T18487.1-2015 electric vehicle conductive charging system-part 1: general requirements "and" GB/T20234.2-2015 connection for conductive charging of electric vehicles — part 2: the specification in the ac charging interface is a physical medium supporting the ac protocol charging. The treasured that charges supports outdoor alternating-current charging stake gun insertion to charge, and alternating current commercial power gets into the rectifier unit behind the alternating-current charging interface seat, and the rectifier unit converts 220Vac alternating current commercial power into 311Vdc direct current high voltage and inserts bidirectional DC/DC and keeps apart transform power input end, charges treasured energy storage battery that charges after step-down transform.

Specifically, the AC output interface is used for 220Vac AC output, the charger energy storage battery can provide 220Vac AC for the outside after being inverted by an AC inverter, the design power is 500W, and the charger energy storage battery can be connected with AC loads such as a notebook computer and an electric tool.

Specifically, the 12Vdc direct current output interface, the Type-C output interface and the USB-a output interface are external additional direct current output ports of the power bank, and are obtained by performing voltage reduction and conversion on the energy of the energy storage battery of the power bank through a DC conversion power supply. The 12Vdc direct current output interface provides 13.6Vdc/10A output power, and an automobile storage battery can be charged through an automobile ignition wire to provide emergency ignition service; the Type-C output interface supports a USB-PD fast charging protocol, the output voltage is adaptive to 5Vdc/9Vdc/12Vdc/15Vdc/20Vdc, the maximum current/power is designed to be 3A/60W, and the Type-C output interface is compatible with APPLE2.4A, DCP1.5A, QC3.0/4-12V, QC 2.0.0/9V/12V, SamsungAFC9V, HuaweiFCP9V and other fast charging protocols; the USB-A output interface provides 5Vdc/2.4A output power, and can provide charging service for mobile phones, small audio and video entertainment equipment, portable electric toys and the like.

Specifically, the touch screen is the man-machine interface of the treasured that charges for externally showing interchange, direct current input and output voltage, electric current and power isoparametric, data such as the operating condition of each part equipment in the treasured that charges and energy storage battery charge-discharge current and SOC, in addition, can also force control the treasured that charges through the touch screen and charge electric automobile and self-make up the electricity operation, and can control the break-make of AC output, 12Vdc direct current output, Type-C output and USB-A output.

The electric vehicle charger provided by the invention can be carried along with a vehicle for traveling, is safe and reliable, is convenient to use, and has the working process and the operation steps as follows:

(1) if the electric quantity of the battery of the electric automobile is too low or the electric automobile enters an electricity shortage state in the running process, the electric automobile is immediately driven to a safety zone, the electric automobile is flamed out and stopped, a trunk is opened, a direct current charging gun and a connecting cable are taken out, one end of the direct current charging gun is inserted into a direct current power supply interface seat on a charging treasure, one end of the direct current charging gun is inserted into a direct current charging interface seat on the electric automobile, then a power switch on the charging treasure is pressed, the charging treasure is started, after all the electric automobiles are ready, the direct current gun is selected to be charged through a touch screen, and the charging treasure starts to execute a direct current charging process on the electric automobile;

(2) the parameters such as the charging state, the charging current and the SOC are known by checking the touch screen, when the SOC of the power battery of the electric automobile is increased enough to enable the automobile to run to an operation site provided with a charging pile, the 'stopping charging' can be selected through the touch screen, the direct-current charging process is finished, the power supply of a charging treasure is turned off, and a charging cable is pulled down;

(3) after a vehicle is driven to an operation site provided with a charging pile, an electric vehicle and a charging treasure can be charged simultaneously through a direct current charging pile, a direct current charging gun and a connecting cable carried along with the vehicle are firstly respectively inserted into a direct current power supply interface seat on the charging treasure and a direct current charging interface seat on the electric vehicle, then the direct current charging gun of the operation site is inserted into the direct current charging interface seat on the charging treasure, after all the direct current charging guns are ready, a 'one gun and two charging' mode is selected through a touch screen, namely, the direct current charging pile is started to charge the electric vehicle and the charging treasure, the 'one gun and two charging' mode is divided into priority levels, the electric vehicle is charged preferentially, and the charging treasure is charged after the electric vehicle is fully charged;

(4) if the parking lot of the residential area of the user is provided with the alternating-current charging pile, the charging treasure can be subjected to alternating-current charging by the alternating-current charging pile during parking at night, the alternating-current charging time is longer than the direct-current charging time, the alternating-current charging gun is directly inserted into the alternating-current charging interface seat on the charging treasure, and then the alternating-current charging process of the charging treasure is started by selecting the alternating-current gun insertion for power supplement through the touch screen;

(5) if the ignition of the key switch fails due to the fact that the automobile lead-acid storage battery is in power shortage, the automobile ignition wire attached to the automobile can be connected to the positive pole and the negative pole of the vehicle-mounted lead-acid storage battery from the 12Vdc direct current output interface of the charger, and then the 'starting of 12Vdc direct current output' is selected through the touch screen to provide emergency ignition service;

(6) if need use AC output function, Type-C output function and USB-A output function that exchange on the treasured that charges, only need to insert corresponding load equipment to corresponding output interface, then select respectively through the touch-sensitive screen "start AC output", "start Type-C output" and "start USB-A output" can supply power to the external.

Specifically, the invention provides an electric vehicle charging bank capable of supporting a direct current charging national standard, aiming at the problems that the charging current of a vehicle-mounted power battery is small, the charging time is long, the self-charging time is also long, and the charging bank is not matched with a 2015 version direct current charging national standard interface in the current electric vehicle charging bank on the market, the charging bank can be used for extending and expanding the functions of an electric vehicle charging pile, is compatible with the 2015 version national standard charging communication protocol, can directly utilize a direct current charging gun and a connecting cable carried along with a vehicle to plug the electric vehicle for quick charging, and simultaneously supports an outdoor direct current charging pile and an alternating current charging pile to plug the gun for charging. In addition, the electric vehicle charging treasure provided by the invention can also realize a double-charging mode that an outdoor direct current charging pile charges the electric vehicle and the charging treasure in one gun and two ways, so that two devices can be charged at one time, the defects of difficult charging, slow charging and inconvenient charging of the electric vehicle in the driving process are thoroughly solved, and the electric vehicle charging treasure has higher market popularization value.

The above description is only a preferred embodiment of the present invention, and not intended to limit the scope of the present invention, and all modifications and equivalents of the present invention, which are made by the contents of the present specification and the accompanying drawings, or directly/indirectly applied to other related technical fields, are included in the scope of the present invention.