CN114851902B

CN114851902B - Battery changing control system and method

Info

Publication number: CN114851902B
Application number: CN202210509415.6A
Authority: CN
Inventors: 陆文成
Original assignee: Aulton New Energy Automotive Technology Co Ltd
Current assignee: Aulton New Energy Automotive Technology Co Ltd
Priority date: 2018-07-20
Filing date: 2018-07-20
Publication date: 2023-07-14
Anticipated expiration: 2038-07-20
Also published as: CN110745108B; CN114851901A; CN110745108A; CN114851901B; CN114715081B; CN114715081A; CN114851902A

Abstract

The invention discloses a power conversion control system and a power conversion control method. Wherein the system comprises: the control unit and at least two power conversion devices; the control unit is used for selecting a first battery rack from at least one battery rack and selecting a second battery rack from the at least one battery rack; the control unit is further configured to configure at least one of the at least two battery change devices as a battery-charging battery change device, and configure at least one of the at least two battery change devices as a battery-discharging battery change device. The invention uses two power conversion devices in the whole process of vehicle power conversion through the control of the control unit: the two power conversion devices respectively have different responsibilities, and the power conversion tasks are completed together, so that the whole power conversion time is at least half of the time shortened compared with the time for realizing power conversion by only adopting one power conversion device, and the power conversion speed and efficiency are improved.

Description

Battery changing control system and method

The invention is a divisional application of patent application of the invention with the application date of 2018, 07, 20, the application number of 201810805316.6 and the name of 'power conversion control system and method'.

Technical Field

The invention belongs to the field of power conversion control, and particularly relates to a power conversion control system and method.

Background

The existing electric automobile mainly has two power exchanging modes, namely a direct charging mode and a quick-changing mode of a replaceable battery.

The quick-change type vehicle battery charging system is characterized in that the quick-change type vehicle battery charging system is usually carried out in a power change station, a battery with insufficient or no electricity on a vehicle is taken down by the power change equipment of the power change station, the battery is placed on a unified charging frame for charging, and then the power change equipment takes down a new or full-electricity battery from the charging frame and loads the new or full-electricity battery into the vehicle. In the mode, the battery is required to be taken down and charged, the battery is required to be repeatedly moved between the vehicle and the charging frame, the power consumption is long, and the efficiency is low.

Disclosure of Invention

The invention aims to overcome the defects of long power exchange consumption and low efficiency caused by the fact that the battery is taken down and put in by the same power exchange equipment in the prior art.

The invention solves the technical problems through the following technical scheme:

the invention provides a power conversion control system, comprising: the control unit and at least two power conversion devices;

the control unit is used for selecting a battery placing rack meeting a first condition from at least one battery placing rack as a first battery placing rack, selecting a battery placing rack meeting a second condition from the at least one battery placing rack as a second battery placing rack, wherein the battery placing rack is provided with a plurality of battery placing bins for placing batteries, the first condition is set to be used for placing batteries suitable for electric vehicles, and the second condition is set to be provided with an empty battery placing bin;

The control unit is further configured to configure at least one of the at least two battery changing devices as a battery charging device, and configure at least one of the at least two battery changing devices as a battery discharging device;

the battery loading and replacing equipment is used for transporting a battery to be loaded, wherein the battery to be loaded is taken down from the first battery placing frame, is suitable for the electric vehicle and is to be mounted on the electric vehicle;

the battery unloading and replacing device is used for transporting a battery lack, wherein the battery lack is taken off from the electric vehicle and is to be placed in the empty battery placing bin.

Preferably, the control unit is further configured to monitor an electric quantity of a battery placed on the battery placement frame;

the first condition is set to place a battery suitable for the electric vehicle and full of electricity;

or, the first condition is preferably set to be that a battery which is suitable for the electric vehicle and is full of electricity is placed, and if the battery placing frame which accords with the first condition is not arranged in the at least one battery placing frame, the first condition is modified to be that a battery which is suitable for the electric vehicle and has the highest electric quantity is placed.

Preferably, the control unit is further configured to, when more than one battery rack meets the first condition, randomly select one battery rack from the battery racks meeting the first condition as the first battery rack, or select one battery rack closest to the electric vehicle or a vehicle carrying platform for parking the electric vehicle as the first battery rack;

and/or the control unit is further configured to, when more than one battery rack meets the second condition, randomly select one battery rack from the battery racks meeting the second condition as the second battery rack, or select one battery rack closest to the electric vehicle or a vehicle carrying platform for parking the electric vehicle as the second battery rack.

Preferably, the battery placing racks are arranged on two sides of the vehicle carrying platform along the direction of the electric vehicle entering the vehicle carrying platform.

Preferably, if there is a multifunctional battery rack in the at least one battery rack, the multifunctional battery rack is a battery rack in which the first condition and the second condition are both met, the control unit is further configured to:

The multifunctional battery placing frame is used as the first battery placing frame and the second battery placing frame at the same time;

or, taking the multifunctional battery placing frame as any one of the first battery placing frame and the second battery placing frame;

or, any one of the following conditions is taken as a necessary condition for taking the multifunctional battery rack as the first battery rack:

all the rest of the battery placing racks do not meet the first condition;

the number of the battery racks meeting the first condition is smaller than the number of the battery racks meeting the second condition;

the number of the battery racks meeting the first condition is smaller than that of the battery racks meeting the second condition, and the absolute value of the difference value of the battery racks meeting the first condition is smaller than a first difference value threshold;

the number of the rest battery racks meeting the first condition is less than a first number threshold;

or, any one condition is taken as a necessary condition for taking the multifunctional battery placing frame as a second battery placing frame:

the rest of the battery placing racks do not meet the second condition;

The number of the battery racks meeting the second condition is smaller than that of the battery racks meeting the first condition;

the number of the battery racks meeting the second condition is smaller than that of the battery racks meeting the first condition, and the absolute value of the difference value of the battery racks meeting the second condition is smaller than a second difference value threshold;

and the number of the rest battery racks meeting the second condition is less than a second number threshold.

Preferably, the battery placing bin is further used for charging the battery.

Preferably, the at least two power conversion devices are all single-function power conversion devices;

or, the power supply is multifunctional power conversion equipment;

or the single-function power conversion equipment and the multifunctional power conversion equipment are adopted;

the single-function battery-powered device has a first structure and can only be configured as a battery-powered device, or has a second structure and can only be configured as a battery-powered device;

the multifunctional battery changing device has a first structure and a second structure and can be configured as any one of battery unloading battery changing device and battery loading battery changing device.

Preferably, the battery replacing device configured as the battery charging and replacing device is the nearest battery replacing device to the first battery placing frame;

Or, the battery changing device configured as the battery unloading battery changing device is the closest battery changing device to the electric vehicle or a vehicle carrying platform for parking the electric vehicle;

or each battery placing rack and at least one battery replacing device have a preset binding relation; the battery replacing equipment configured as the battery-mounted battery replacing equipment is the battery replacing equipment which has a binding relation with the first battery placing frame or the battery replacing equipment which has a binding relation with the first battery placing frame and is nearest to the first battery placing frame; the battery changing device configured as the battery unloading battery changing device is a battery changing device having a binding relation with the second battery placing frame or a battery changing device having a binding relation with the second battery placing frame and closest to the electric vehicle or a vehicle carrying platform for parking the electric vehicle.

Preferably, if the battery model for which the electric vehicle is suitable is predictable before the electric vehicle is parked on the vehicle loading platform:

the control unit is further configured to select, before the electric vehicle is parked on the vehicle carrying platform, a battery rack meeting a first condition from the at least one battery rack as a first battery rack, and send a battery taking instruction to the battery charging and replacing device, where the battery taking instruction is used to instruct the battery charging and replacing device to take off the battery to be charged from the first battery rack;

The battery charging and replacing equipment is also used for executing the battery taking instruction;

the control unit is further configured to send a first movement instruction to the battery charging and replacing device after the battery charging and replacing device finishes executing the battery taking instruction, where the first movement instruction is used to instruct the battery charging and replacing device to park in a first preset waiting position in advance, and the first preset waiting position is a position that is not more than a first distance threshold from the vehicle carrying platform;

the battery charging and replacing device is further used for executing the first moving instruction.

Preferably, the battery model to which the electric vehicle is applicable is predicted by: the vehicle-mounted platform is limited to parking an electric vehicle to which the model of battery is applicable.

Preferably, the control unit is further configured to send a second movement instruction to the battery unloading and power exchanging device before the electric vehicle is parked on the vehicle loading platform, where the second movement instruction is used to instruct the battery unloading and power exchanging device to park in a second preset waiting position in advance; the battery unloading and replacing device is further used for executing the second movement instruction.

Preferably, when the preset power change position is in a parking state, the second preset waiting position and the preset power change position are in the same position, and the preset power change position is a position suitable for taking a battery from an electric vehicle parked on the vehicle carrying platform.

Preferably, when the preset power change position is in a non-berthable state, the second preset waiting position is a position which is not more than a second distance threshold from the preset power change position, and the preset power change position is a position suitable for taking a battery from an electric vehicle berthed on the vehicle carrying platform;

the control unit is further configured to send a fine tuning instruction to the battery unloading and power exchanging device after the electric vehicle is parked on the vehicle carrying platform, where the fine tuning instruction is configured to instruct the battery unloading and power exchanging device to move from the second preset waiting position to the preset power exchanging position.

Preferably, the preset power change position is in a moored state when the following conditions are satisfied at the same time, otherwise, the preset power change position is in a non-moored state:

the preset power change position is a vacancy;

a passage for the battery unloading and replacing equipment to move to the preset power replacing position exists;

when the battery unloading and battery replacing equipment is predicted to be parked at the preset power replacing position, the battery unloading and battery replacing equipment cannot block an electric vehicle entering the vehicle carrying platform.

Preferably, the preset power change position is determined to be located below or above the vehicle carrying platform according to the structure of the vehicle carrying platform.

Preferably, the control unit is further configured to send a third movement instruction to the battery unloading and changing device after the electric vehicle is parked on the vehicle loading platform, where the third movement instruction is used to instruct the battery unloading and changing device to move and park at a preset power changing position, where the preset power changing position is a position suitable for taking a battery from the electric vehicle parked on the vehicle loading platform; the battery unloading and replacing device is further used for executing the third movement instruction.

Preferably, the control unit is further configured to send a battery unloading instruction to the battery unloading and changing device after the electric vehicle is parked on the vehicle loading platform and the battery unloading and changing device is parked on the preset voltage changing device, where the battery unloading instruction is used for instructing the battery unloading and changing device to take off the battery with low power from the electric vehicle;

the battery unloading and replacing equipment is also used for executing the battery unloading instruction;

the control unit is further configured to send a fourth movement instruction to the battery unloading and changing device after the battery unloading and changing device executes the battery unloading instruction, where the fourth movement instruction is used to instruct the battery unloading and changing device to move to the second battery placing frame and place the battery with the electric shortage in the empty battery placing bin;

The battery unloading and replacing device is further used for executing the fourth moving instruction.

Preferably, the control unit is further configured to send a fifth movement instruction to the battery charging and power changing device after the battery discharging and power changing device leaves the preset power changing position or leaves the preset power changing position by more than a third distance threshold, where the fifth movement instruction is used to instruct the battery charging and power changing device to move to the preset power changing position;

the battery charging and replacing equipment is also used for executing the fifth moving instruction;

the control unit is further configured to send a battery charging instruction to the battery charging and replacing device after the battery charging and replacing device executes the fifth movement instruction, where the battery charging instruction is used to instruct the battery charging and replacing device to charge the battery to be charged into the electric vehicle;

the battery charging and replacing device is also used for executing the battery charging instruction.

The invention also provides a power conversion control method, which comprises the following steps:

selecting a battery placing rack meeting a first condition from at least one battery placing rack as a first battery placing rack, wherein the battery placing rack is provided with a plurality of battery placing bins for placing batteries, and the first condition is that the batteries suitable for electric vehicles are placed;

Selecting a battery rack meeting a second condition from the at least one battery rack as a second battery rack, wherein the second condition is set to have an empty battery placing bin;

at least one battery replacing device of the at least two battery replacing devices is configured to be a battery replacing device, the battery replacing device is used for transporting a battery to be assembled, and the battery to be assembled is taken off from the first battery placing frame, is suitable for the electric vehicle and is to be installed on the electric vehicle;

at least one of the at least two battery changing devices is configured as a battery unloading battery changing device, and the battery unloading battery changing device is used for transporting a battery which is taken off from the electric vehicle and is to be placed in the empty battery placing bin.

Preferably, the power conversion control method further includes: monitoring the electric quantity of a battery placed on the battery placing frame;

Preferably, the power conversion control method further includes:

when more than one battery rack meets the first condition, randomly selecting one battery rack from the battery racks meeting the first condition as the first battery rack, or selecting one battery rack closest to the electric vehicle or a vehicle carrying platform for parking the electric vehicle as the first battery rack;

and/or when more than one battery rack meets the second condition, randomly selecting one battery rack from the battery racks meeting the second condition as the second battery rack, or selecting one battery rack closest to the electric vehicle or the vehicle carrying platform as the second battery rack.

Preferably, the power conversion control method further includes:

judging whether a multifunctional battery placing rack exists in the at least one battery placing rack, wherein the multifunctional battery placing rack is a battery placing rack in which the first condition and the second condition are met;

if present, then:

all the rest of the battery placing racks do not meet the first condition;

the rest of the battery placing racks do not meet the second condition;

or, the power supply is multifunctional power conversion equipment;

Preferably, if the battery model to which the electric vehicle is applicable is predictable before the electric vehicle is parked on the vehicle loading platform;

the power conversion control method further comprises the following steps:

before the electric vehicle is parked on the vehicle carrying platform, selecting a battery placing rack meeting a first condition from the at least one battery placing rack as a first battery placing rack, and commanding the battery charging and replacing equipment to take off the battery to be charged from the first battery placing rack;

After the battery loading and replacing equipment takes down the battery to be loaded from the first battery placing frame, commanding the battery loading and replacing equipment to be parked in a first preset waiting position in advance, wherein the first preset waiting position is a position which is not more than a first distance threshold from the vehicle loading platform.

Preferably, the power conversion control method further includes:

and before the electric vehicle is parked on the vehicle carrying platform, commanding the battery unloading and power changing device to be parked in a second preset waiting position in advance.

The power conversion control method further comprises the following steps: after the electric vehicle is parked on the vehicle carrying platform, the battery unloading and power exchanging device is commanded to move from the second preset waiting position to the preset power exchanging position.

the preset power change position is a vacancy;

Preferably, the power conversion control method further includes:

after the electric vehicle is parked on the vehicle carrying platform, the battery unloading and power exchanging device is commanded to move and park at a preset power exchanging position, wherein the preset power exchanging position is a position suitable for taking a battery from the electric vehicle parked on the vehicle carrying platform.

Preferably, the power conversion control method further includes:

After the electric vehicle is parked on the vehicle carrying platform and the battery unloading and power exchanging device is parked on the preset power exchanging position, the battery unloading and power exchanging device is instructed to take off the power-shortage battery from the electric vehicle;

after the battery unloading and replacing equipment removes the battery lack from the electric vehicle, the battery unloading and replacing equipment is commanded to move to the second battery placing rack and place the battery lack in the empty battery placing bin.

Preferably, the power conversion control method further includes:

after the battery unloading and replacing equipment leaves the preset power replacing position or leaves the preset power replacing position to exceed a third distance threshold value, the battery loading and replacing equipment is commanded to move to the preset power replacing position;

and after the battery charging and replacing equipment moves to the preset power replacing position, commanding the battery charging and replacing equipment to charge the battery to be charged into the electric vehicle.

On the basis of conforming to the common knowledge in the field, the above preferred conditions can be arbitrarily combined to obtain the preferred examples of the invention.

The invention has the positive progress effects that: the invention uses two power conversion devices in the whole process of vehicle power conversion through the control of the control unit:

The battery charging equipment is provided with a moving track between the first battery placing rack and the electric vehicle, so that the transportation of the battery to be charged is realized;

and the battery unloading and replacing equipment has a moving track between the electric vehicle and the second battery placing frame, so that the transportation of the battery with the shortage of electricity is realized.

The two power conversion devices respectively have different responsibilities, and the power conversion tasks are completed together, so that the whole power conversion time is at least half of the time shortened compared with the time for realizing power conversion by only adopting one power conversion device, and the power conversion speed and efficiency are improved.

Drawings

FIG. 1 is a schematic block diagram of a power conversion control system according to embodiment 1 of the present invention;

fig. 2 is a schematic plan view of a battery replacement control system according to embodiment 5 of the present invention, in which battery replacement equipment is configured and battery removal equipment is configured;

FIG. 3 is a schematic side view of a first embodiment of the vehicle platform according to the present invention;

FIG. 4 is a schematic side view of a second embodiment of the vehicle platform according to the present invention;

FIG. 5 is a flowchart of a power conversion control method according to embodiment 8 of the present invention;

FIG. 6 is a flowchart of a power conversion control method according to embodiment 13 of the present invention;

fig. 7 is a flowchart of a power-change control method according to embodiment 14 of the present invention.

Detailed Description

The invention is further illustrated by means of the following examples, which are not intended to limit the scope of the invention.

Example 1

Fig. 1 shows a power conversion control system of the present embodiment. The battery replacement control system 10 includes: a control unit 11 and at least two battery change devices 12. The communication connection between the control unit 11 and each of the battery-replacing devices 12 is preferably a wireless communication connection, and may be specifically implemented by communication means such as 2G, 3G, 4G, bluetooth, etc., which is not limited by the fact that the communication connection may be a wired communication connection under certain special conditions (e.g., the control unit 11 is very close to the battery-replacing device 12 and the movable range of the battery-replacing device 12 is very small).

The control unit 11 is configured to select, from at least one battery rack 13, a battery rack that meets a first condition, as a first battery rack 13A, the battery rack having a plurality of battery storage bins for storing batteries, the first condition being set to store batteries suitable for use in an electric vehicle. The battery suitable for the electric vehicle is generally the same as the battery used for the electric vehicle.

The control unit 11 is further configured to select, from the at least one battery rack 13, a battery rack that meets a second condition, which is set to have an empty battery compartment, as a second battery rack 13B.

The control unit 11 is further configured to configure at least one of the at least two battery change devices 12 to be a battery-powered battery change device 12A. The battery charging and replacing device 12A is used for transporting a battery to be charged, which is a battery that is removed from the first battery holder 13A, is suitable for the electric vehicle, and is to be mounted on the electric vehicle.

The control unit 11 is further configured to configure at least one of the at least two battery change devices 12 as a battery-discharge battery change device 12B. The battery-unloading and battery-changing device 12B is used for transporting a battery that is to be placed in the empty battery placement compartment and is to be removed from the electric vehicle.

In this embodiment, in the whole process of changing the power of the vehicle, two power changing devices 12 are used, namely, a battery charging power changing device 12A and a battery discharging power changing device 12B, the moving track of the battery charging power changing device 12A is between the first battery placing frame 13A and the electric vehicle, the transportation of the battery to be charged is realized, the moving track of the battery discharging power changing device 12B is between the electric vehicle and the second battery placing frame 13B, the transportation of the battery lack is realized, the two power changing devices respectively have different responsibilities, and the power changing tasks are completed together, so that the whole power changing time is at least half of the time compared with the time of realizing the power changing by only adopting one power changing device, and the power changing speed and the efficiency are improved.

Example 2

The power conversion control system of the present embodiment is a further improvement on the basis of embodiment 1, and is mainly embodied in the setting of the first condition. The first condition is used as a basis for selecting the first battery holder 13A, and other preferable matching conditions may be further set in addition to the necessary placement of the battery suitable for the electric vehicle. In this embodiment, the matching condition is mainly related to the electric quantity of the battery, and the control unit 11 is further configured to monitor the electric quantity of the battery placed on each of the battery holders.

In particular, the first condition may be set to place a battery suitable for the electric vehicle and full-charged. Accordingly, the control unit 11 is configured to determine whether a battery rack that meets the first condition exists in the at least one battery rack, and if so, select one of the battery racks as the first battery rack 13A. If there is no battery rack meeting the first condition, the control unit 11 may send an alarm signal to indicate that the electric vehicle cannot be powered up.

Alternatively, in order to increase the probability of being able to change the electric power for the electric vehicle, the first condition may be preferentially set to place a battery suitable for the electric vehicle and full-charged, and if the at least one battery rack does not have a battery rack that meets the first condition, the first condition is modified to place a battery suitable for the electric vehicle and having the highest electric power. Accordingly, the first condition is set as default to be that a battery suitable for the electric vehicle and full-charged is placed, and the control unit 11 is configured to determine whether a battery rack meeting the default first condition exists in the at least one battery rack, if yes, select one of the battery racks as the first battery rack 13A, and if no:

And setting the first condition modification to place a battery which is suitable for the electric vehicle and has the highest electric quantity, judging whether a battery placing frame which meets the current first condition exists in the at least one battery placing frame again, and if so, selecting one battery placing frame as a first battery placing frame 13A. If there is no battery rack meeting the first condition, the control unit 11 may send an alarm signal to indicate that the electric vehicle cannot be powered up.

In addition, in this embodiment, the battery placement bin may further have a battery charging circuit for charging the batteries, and the control unit 11 monitors the electric quantity of each battery in real time, so as to facilitate the selection of the first battery placement frame 13A.

Of course, in other embodiments, the first condition may be set to other conditions as desired.

Example 3

The battery replacement control system of the present embodiment is a further improvement based on embodiment 1 or 2, and is mainly characterized in that the control unit 11 selects the first battery placing frame 13A and the second battery placing frame 13B. When the number of battery racks is two or more, it is likely that two or more battery racks match the first condition or the second condition at the same time. The control unit 11 may further set selection requirements of the first battery rack 13A and the second battery rack 13B according to requirements.

In this embodiment, in order to cope with a case where two or more battery racks meet the first condition at the same time, the control unit 11 may be configured to determine whether or not there is more than one battery rack meeting the first condition, and if so:

randomly selecting one battery rack from the battery racks meeting the first condition as the first battery rack 13A;

alternatively, in order to shorten the moving path and moving time of the battery exchanging device 12A and to increase the exchanging efficiency, one of the battery racks closest to the electric vehicle (if the battery vehicle is not parked yet, one closest to the loading platform rack for parking the electric vehicle) is selected as the first battery rack 13A.

Of course, if there is only one battery rack satisfying the first condition, it is generally only possible to use it as the first battery rack 13A.

Likewise, in order to cope with a case where two or more battery racks meet the second condition at the same time, the control unit 11 may be configured to determine that more than one battery rack meets the second condition, if so:

Randomly selecting one battery rack from the battery racks meeting the second condition as the second battery rack 13B;

alternatively, in order to shorten the moving path and moving time of the battery-unloading and battery-changing device 12B and to increase the battery-changing efficiency, one of the battery racks closest to the electric vehicle (if the battery vehicle is not parked yet, one closest to the loading platform rack for parking the electric vehicle) is selected as the second battery rack 13B.

Of course, if there is only one battery rack satisfying the second condition, it can be generally used only as the second battery rack 13B.

In order to further facilitate positioning of the battery placing frames, selecting the first battery placing frame 13A/the second battery placing frame 13B and shortening the moving path of the battery loading and unloading device 12A/the battery unloading and replacing device 12B, the battery placing frames can be arranged on two sides of the vehicle carrying platform along the direction of the electric vehicle driving into the vehicle carrying platform. The vehicle-carrying platform can be a special platform for vehicle power exchange or other common platforms which can be used for parking vehicles and are convenient for power exchange.

In this embodiment, the selection of the first battery rack 13A and the second battery rack 13B is relatively independent, that is, the selection requirements of the first battery rack 13A and the second battery rack 13B may be set according to different requirements.

Example 4

The battery replacement control system of the present embodiment is a further improvement based on embodiment 1 or 2, and is mainly characterized in that the control unit 11 selects the first battery placing frame 13A and the second battery placing frame 13B. Unlike embodiment 3, in this embodiment, the association between the first battery holder 13A and the second battery holder 13B is considered to some extent when selecting them.

Specifically, the control unit 11 may be configured to determine whether a multifunctional battery rack exists in the at least one battery rack, where the multifunctional battery rack is a battery rack that meets both the first condition and the second condition.

If the multifunctional battery rack is not present, the first battery rack 13A may be selected from the battery racks conforming to the first condition and the second battery rack 13B may be selected from the battery racks conforming to the second condition, respectively, according to the scheme of embodiment 3.

If the multifunctional battery holder is present, the control unit 11 may also preferably use the multifunctional battery holder to configure an identity for it in any one of four ways:

first, the multifunctional battery rack is used as the first battery rack 13A and the second battery rack 13B at the same time.

And a second step of setting the multifunctional battery holder as one of the first battery holder 13A and the second battery holder 13B.

Third, in order to maintain the balance in number between the battery rack conforming to the first condition and the battery rack conforming to the second condition, any one of the following conditions is taken as a necessary condition for taking the multifunctional battery rack as the first battery rack 13A:

condition (1): all the rest of the battery placing racks do not meet the first condition;

condition (2): the number of the battery racks meeting the first condition is smaller than the number of the battery racks meeting the second condition;

condition (3): the number of the battery racks meeting the first condition is smaller than that of the battery racks meeting the second condition, and the absolute value of the difference value of the battery racks meeting the first condition is smaller than a first difference value threshold;

Condition (4): and the number of the rest battery racks meeting the first condition is less than a first number threshold.

For the third, for example: taking the condition (1) as a necessary condition for taking the multifunctional battery rack as the first battery rack 13A, that is, correspondingly, the control unit 11 needs to determine whether all the other battery racks do not meet the first condition except for the multifunctional battery rack in the at least one battery rack, and if yes, taking the multifunctional battery rack as the first battery rack 13A;

as another example, the condition (2) is taken as a necessary condition for taking the multifunctional battery rack as the first battery rack 13A, that is, the control unit 11 needs to determine whether the number of battery racks meeting the first condition is smaller than the number of battery racks meeting the second condition in the at least one battery rack except for the multifunctional battery rack, if so, the multifunctional battery rack is taken as the first battery rack 13A (for example, 2 battery racks meeting the first condition and 3 battery racks meeting the second condition are taken as the first battery rack 13A);

As another example, the condition (3) is taken as a necessary condition for taking the multifunctional battery rack as the first battery rack 13A, that is, the control unit 11 needs to determine whether the number of battery racks meeting the first condition is smaller than the number of battery racks meeting the second condition and the absolute value of the difference value of the two is smaller than the first difference threshold, if yes, the multifunctional battery rack is taken as the first battery rack 13A (for example, the number of battery racks meeting the first condition is 2, the number of battery racks meeting the second condition is 6, the first difference threshold is 3, and the multifunctional battery rack is taken as the first battery rack 13A);

for another example, the condition (4) is taken as a necessary condition for taking the multifunctional battery rack as the first battery rack 13A, that is, the control unit 11 needs to determine whether the number of battery racks meeting the first condition among the at least one battery rack is less than a first number threshold, if yes, the multifunctional battery rack is taken as the first battery rack 13A (for example, 1 battery rack meeting the first condition, and if the first number threshold is 2, the multifunctional battery rack is taken as the first battery rack 13A).

Fourth, in order to maintain the balance in number between the battery rack conforming to the first condition and the battery rack conforming to the second condition, any one of the conditions is taken as a necessary condition for taking the multifunctional battery rack as the second battery rack 13B:

condition (1): the rest of the battery placing racks do not meet the second condition;

condition (2): the number of the battery racks meeting the second condition is smaller than that of the battery racks meeting the first condition;

condition (3): the number of the battery racks meeting the second condition is smaller than that of the battery racks meeting the first condition, and the absolute value of the difference value of the battery racks meeting the second condition is smaller than a second difference value threshold;

condition (4): and the number of the rest battery racks meeting the second condition is less than a second number threshold.

For the fourth, reference is made to the third, and this is not repeated here.

Example 5

The battery-changing control system of the present embodiment is a further improvement on the basis of embodiment 1, and is mainly represented by the configuration of the control unit 11 for the battery-charging and discharging battery-changing

devices

12A and 12B. The power conversion apparatus 12 can be broadly divided into two types:

The single-function battery-changing device is relatively single in structure, and can be configured to only mount the battery-changing device 12A or configured to only dismount the battery-changing device 12B;

the multifunctional battery-changing device has a relatively complex structure, has the first structure and the second structure, and can be configured as any one of the battery-unloading battery-changing device 12B and the battery-loading battery-changing device 12A.

The first structure includes a structure required for removing the battery to be mounted from the first battery holder 13A and attaching the battery to the electric vehicle, for example, a gripping mechanism for removing the battery to be mounted from the first battery holder 13A, a lifting mechanism for attaching the battery to be mounted to the electric vehicle, and the like.

The second structure includes a structure necessary for realizing the removal of the power-shortage battery from the electric vehicle and placement in the second battery placement frame 13B, for example, an unlocking mechanism for unlocking the power-shortage battery from the electric vehicle, a placement mechanism for placing the power-shortage battery in the second battery placement frame 13B, and the like.

In the power conversion control system of the present embodiment, the at least two power conversion devices 12 may be single-function power conversion devices (but the single-function power conversion device having the first structure and the single-function power conversion device having the second structure need to be all; or, the power supply is multifunctional power conversion equipment; or the single-function power conversion equipment and the multifunctional power conversion equipment are adopted.

In order to shorten the moving path and moving time of the battery-mounted battery-powered exchanging device 12A and to increase the power exchanging efficiency, the control unit 11 preferably uses the battery-mounted battery-powered exchanging device 12A closest to the first battery holder 13A. Specifically, as shown in fig. 2, after the first battery rack 13A is selected, the control unit 11 may determine the position of the first battery rack 13A, screen the single-function power conversion device and the multi-function power conversion device (indicated in the drawing) with the first structure, respectively calculate the distances from each of the single-function power conversion device and the multi-function power conversion device with the first structure to the first battery rack 13A, and select the power conversion device closest to the first power conversion device to be configured as the battery-charging power conversion device 12A, where an arrow at 12A indicates a moving direction of the battery-charging power conversion device 12A.

In order to shorten the moving path and moving time of the battery-unloading battery-changing device 12B and to increase the battery-changing efficiency, the control unit 11 is preferably located at a distance from the battery-changing device of the electric vehicle (preferably at a distance from the closest battery-changing device to the loading platform for parking the electric vehicle if the electric vehicle is not already parked) when the battery-unloading battery-changing device 12B is arranged. Specifically, the control unit 11 may screen the single-function power conversion device and the multi-function power conversion device (represented by ≡in the figure) having the second structure, calculate the distance between each of the single-function power conversion device and the multi-function power conversion device having the second structure and the electric vehicle 14 (calculate the distance between the screened power conversion device and the vehicle platform 15 if the electric vehicle 14 is not parked), select the power conversion device closest to the screened power conversion device to be configured as the battery-unloading power conversion device 12B, and the arrow at 12B in the figure indicates the moving direction of the battery-loading power conversion device 12B.

In other embodiments, in order to facilitate management and allocation of the battery replacement device, each battery rack and at least one battery replacement device have a preset binding relationship, that is, each battery rack can only take and place the battery by the battery replacement device having the binding relationship.

When the battery-mounted battery-powered device 12A is configured, the control unit 11 preferably has a binding relationship with the first battery holder 13A or has a binding relationship with the first battery holder 13A and is closest to the first battery holder 13A. Specifically, after the first battery rack 13A is selected, the control unit 11 may screen the single-function battery-replacing device and the multi-function battery-replacing device which have the binding relation with the first battery rack 13A and have the first structure, randomly select one battery-replacing device 12A from the single-function battery-replacing devices and the multi-function battery-replacing devices, or further determine the position of the first battery rack 13A, respectively calculate the distance between the screened battery-replacing device and the first battery rack 13A, and select the battery-replacing device with the closest distance as the battery-replacing device 12A.

When the battery-unloading battery-powered device 12B is configured, the control unit 11 preferably has a binding relationship with the second battery rack 13B or has a binding relationship with the second battery rack 13B and is closest to the electric vehicle (if the battery vehicle is not parked yet, preferably has a binding relationship with the second battery rack 13B and is closest to a vehicle-mounted platform frame for parking the electric vehicle). Specifically, after selecting the second battery rack 13B, the control unit 11 may screen the single-function battery-exchanging device and the multi-function battery-exchanging device having the binding relation with the second battery rack 13B and the second structure, randomly select one battery-unloading battery-exchanging device 12B from the single-function battery-exchanging devices or further respectively calculate the distance between the screened battery-exchanging device and the electric vehicle (if the battery vehicle is not parked, calculate the distance between the screened battery-exchanging device and the vehicle-carrying platform), and select the battery-unloading battery-exchanging device 12B as the closest battery-unloading battery-exchanging device.

Example 6

The power conversion control system of the embodiment is a further improvement based on embodiment 1, and is mainly embodied in the power conversion control process of the power conversion control system. The power change control process in this embodiment is divided into a power change preparation process before the electric vehicle is parked on the vehicle carrying platform and a power change operation process after the electric vehicle is parked on the vehicle carrying platform.

During the preparation for battery replacement, the control unit 11 is configured to pre-select the second battery rack 13B before the electric vehicle is parked on the loading platform, and then configure the battery unloading and replacing device 12B. The process of selecting the second battery holder 13B may be referred to in embodiments 2-4, and the process of configuring the battery unloading and replacing device 12B may be referred to in embodiment 5.

During a power change operation, the control unit 11 is further configured to send a third movement instruction to the battery unloading power changing device 12B after the electric vehicle is parked on the vehicle loading platform, where the third movement instruction is configured to instruct the battery unloading power changing device 12B to move and park in a preset power change position. The battery-discharging and battery-changing device 12B is also configured to execute the third movement instruction.

The control unit 11 is further configured to send a battery unloading instruction to the battery unloading and changing device 12B after the electric vehicle is parked on the vehicle loading platform and the battery unloading and changing device 12B is parked on the preset battery changing position, where the battery unloading instruction is used to instruct the battery unloading and changing device 12B to take off the battery with low power from the electric vehicle. The battery-discharging battery-changing device 12B is also configured to execute the battery-discharging instruction.

In this embodiment, the preset power exchange position is a position suitable for taking the battery from the electric vehicle parked on the vehicle loading platform, and it is understood that when the battery unloading power exchange device 12B is located at the preset power exchange position, the battery unloading power exchange device 12B can take the battery from the electric vehicle parked on the vehicle loading platform through a minimum action. The preset power change position can be specifically determined to be located below or above the vehicle carrying platform according to the structure of the vehicle carrying platform.

Taking the vehicle carrying platform with the first structure as an example, as shown in fig. 3, the vehicle carrying platform 15 is higher than the ground plane and has a hollow area in the middle, when the electric vehicle 14 needs to be parked on the vehicle carrying platform 15 and the battery box of the electric vehicle 14 is located above the hollow area, for the vehicle carrying platform 15 with the first structure, the preset power exchanging position P1 is usually located below the vehicle carrying platform, especially below the hollow area and aligned to the battery outer box of the electric vehicle 14. For the electric vehicle 14 parked on the vehicle-carrying platform 15 for power exchange, the battery-unloading power-exchange device 12B only needs to vertically lift an unlocking mechanism for unlocking the power-failure battery from the electric vehicle at the preset power-exchange position P1, penetrate through the hollowed-out area, insert the unlocking mechanism into a gap between a battery outer box and a battery of the electric vehicle 14, and touch a shifting block of a battery locking box, so that the power-failure battery can be unlocked, and the power-failure battery can be taken down.

Taking the second structure of the vehicle-carrying platform as an example, as shown in fig. 4, a lifting platform 151 is provided in the middle of the vehicle-carrying platform 15, a hollow area is provided in the middle of the lifting platform 151, when the electric vehicle 14 needs to drive into the vehicle-carrying platform 15 and park on the lifting platform 151, and the battery box of the electric vehicle 14 is located above the hollow area, for the vehicle-carrying platform 15 with this structure, the preset power-changing position P2 is usually located above the vehicle-carrying platform 15, especially below the hollow area after the lifting platform 151 is lifted. For the electric vehicle 14 parked on the lifting platform 151 for power conversion, the battery unloading and power conversion device 12B only needs to vertically lift an unlocking mechanism for unlocking the power-saving battery from the electric vehicle 14 at the preset power conversion position P2, penetrate through the hollowed-out area, insert the unlocking mechanism into a gap between a battery outer box and a battery of the electric vehicle 14, and touch a shifting block of a battery locking box, so that the power-saving battery can be unlocked, and the power-saving battery can be taken down.

Of course, the vehicle carrying platform is not limited to the above structure, and may have other structures, and the preset power change position may be further set according to the structure of the vehicle carrying platform, in combination with the second structure of the battery unloading power change device 12B, and a moving path of the second structure when the battery is in a shortage state.

The control unit 11 is further configured to send a fourth movement instruction to the battery unloading and changing device 12B after the battery unloading and changing device 12B has executed the battery unloading instruction, where the fourth movement instruction is used to instruct the battery unloading and changing device 12B to move to the second battery placement frame 13B and place the battery with the power shortage in the empty battery placement bin. The battery-discharging and battery-changing device 12B is also configured to execute the fourth movement instruction.

The control unit 11 is further configured to select the first battery rack 13A after the electric vehicle is parked on the vehicle-carrying platform, and then configure the battery charging and replacing device 12A, and send a battery taking instruction to the battery charging and replacing device 12A, where the battery taking instruction is used to instruct the battery charging and replacing device 12A to take off the battery to be charged from the first battery rack 13A. The battery-powered battery-changing device 12A is also configured to execute the battery-removal instruction. The process of selecting the first battery holder 13A may be referred to in embodiments 2-4, and the process of configuring the battery replacing device 12A may be referred to in embodiment 5.

The control unit 11 is further configured to send a fifth movement instruction to the battery charging and replacing device after the battery discharging and replacing device 12B leaves the preset power replacing position or leaves the preset power replacing position by more than a third distance threshold, where the fifth movement instruction is used to instruct the battery charging and replacing device 12A to move to the preset power replacing position. The battery-powered device 12A is also configured to execute the fifth movement instruction.

The control unit 11 is further configured to send a battery charging instruction to the battery charging and replacing device 12A after the battery charging and replacing device 12A executes the fifth movement instruction, where the battery charging instruction is used to instruct the battery charging and replacing device 12A to charge the battery to be charged into the electric vehicle. The battery-charging and battery-changing device 12A is also configured to execute the battery-charging instruction. So far, the electric vehicle is completely powered, and the battery-mounted power exchanging device 12A is driven away from the preset power exchanging position.

Example 7

The power conversion control system of the embodiment is a further improvement based on embodiment 1, and is mainly embodied in the power conversion control process of the power conversion control system. The power change control process in this embodiment is divided into a power change preparation process before the electric vehicle is parked on the vehicle carrying platform and a power change operation process after the electric vehicle is parked on the vehicle carrying platform. The control instruction of the control unit is different from that of embodiment 6 in the power-change preparation process and the power-change operation process.

In the process of preparing for battery replacement, the control unit 11 may pre-select the second battery placing frame 13B, complete the configuration of the battery unloading and replacing device 12B, and control the battery unloading and replacing device 12B to complete a part of instructions, so as to save the battery unloading time. The process of selecting the second battery holder 13B may be referred to in embodiments 2-4, and the process of configuring the battery unloading and replacing device 12B may be referred to in embodiment 5.

Wherein the control unit 11 controls the battery unloading and replacing device 12B to complete a part of instructions, including: the control unit 11 determines whether the preset battery changing position is in a berthable state, so as to set a second preset waiting position, and sends a second movement instruction to the battery unloading and changing device 12B, where the second movement instruction is used to instruct the battery unloading and changing device 12B to berth in the second preset waiting position in advance. The battery-discharging and battery-changing device 12B is also configured to execute the second movement instruction. Wherein the second preset waiting position is related to the preset swap position, and may be the same position as the preset swap position or a position near the preset swap position (for a description of the preset swap position, see embodiment 6).

The judging whether the preset potential change is in a berthable state or not specifically may include:

when the following conditions are met at the same time, the preset power change position is in a mooring state, otherwise, the preset power change position is in a non-mooring state:

condition (1): the preset power change position is a vacancy;

condition (2): there is a path for the battery-unloading battery-powered device 12B to move to the preset power-changing position;

Condition (3): when the battery unloading and power exchanging device 12B is predicted to be parked at the preset power exchanging position, the battery unloading and power exchanging device 12B does not block the electric vehicle entering the vehicle loading platform.

Whether the condition (3) can be satisfied is generally related to the structure of the vehicle-mounted platform.

Taking the vehicle-mounted platform with the first structure in embodiment 6 as an example, since the electric vehicle is parked on the vehicle-mounted platform when changing electricity, and the preset change-over position is generally located below the vehicle-mounted platform, in general, even if the battery-unloading and change-over device 12B is parked at the preset change-over position before the electric vehicle is driven into the vehicle-mounted platform, the battery-unloading and change-over device 12B will not block the electric vehicle driven into the vehicle-mounted platform, and the condition (3) can be satisfied.

Taking the vehicle carrying platform with the second structure in embodiment 6 as an example, since the electric vehicle is parked on the lifting platform when changing electricity, and the preset changing electric position is also located above the vehicle carrying platform, if the battery unloading and changing device 12B is parked at the preset changing electric position before the electric vehicle is driven into the vehicle carrying platform, the battery unloading and changing device 12B is likely to block the driven electric vehicle when the electric vehicle is driven into the vehicle carrying platform. Therefore, for the second structure of the vehicle-carrying platform, the preset change position cannot generally meet the condition (3), and is in a non-berthable state.

When the preset power change position is in a mooring state, the second preset waiting position and the preset power change position are in the same position. When the preset power change position is in a non-berthable state, the second preset waiting position is a position which is not more than a second distance threshold from the preset power change position, namely a position near the preset power change position.

In this embodiment, if the battery model applicable to the electric vehicle is predictable before the electric vehicle is parked on the vehicle loading platform, the control unit 11 may also pre-select the first battery rack 13A, configure the battery charging and replacing device 12A, and control the battery charging and replacing device 12A to complete a part of instructions during the preparation for battery charging, so as to save battery charging time. The process of selecting the second battery holder 13B may be referred to in embodiments 2-4, and the process of configuring the battery unloading and replacing device 12B may be referred to in embodiment 5. In addition, the battery model to which the electric vehicle is applicable can be predicted by: the vehicle-mounted platform is limited to parking an electric vehicle to which the model of battery is applicable. For example, if a certain vehicle platform is preset to be parked only for an electric vehicle of a certain model of battery, then whether or not the electric vehicle is already parked on the vehicle platform can be determined that the model of battery to which the electric vehicle is applicable must be the certain model.

Wherein the control unit 11 controls the battery charging and replacing device 12A to complete a part of instructions, including: the control unit 11 sends a battery taking instruction to the battery charging and replacing device 12A, where the battery taking instruction is used to instruct the battery charging and replacing device 12A to take off the battery to be charged from the first battery placing frame 13A. The battery-powered battery-changing device 12A is also configured to execute the battery-removal instruction.

The control unit 11 is further configured to send a first movement instruction to the battery charging and replacing device 12A after the battery charging and replacing device 12A finishes executing the battery taking instruction, where the first movement instruction is used to instruct the battery charging and replacing device 12A to park in a first preset waiting position in advance, and the first preset waiting position is near the vehicle carrying platform and is a position not exceeding a first distance threshold from the vehicle carrying platform. The battery-powered device 12A is also configured to execute the first movement instruction.

The power change preparation process is completed, and the power change control system waits for the electric vehicle to drive into and park on the vehicle carrying platform so as to enter the power change operation process.

During the power-changing operation, the control unit 11 determines whether the second preset waiting position where the battery-unloading power-changing device 12B is located is the same as the preset power-changing position:

If yes, sending a battery unloading instruction to the battery unloading and replacing device 12B, wherein the battery unloading instruction is used for instructing the battery unloading and replacing device 12B to take off the battery with the lack of electricity from the electric vehicle; the battery-discharging and battery-changing device 12B is further configured to execute the battery-discharging instruction;

if not, a fine tuning instruction is sent to the battery unloading and replacing device 12B, wherein the fine tuning instruction is used for commanding the battery unloading and replacing device 12B to move from the second preset waiting position to the preset replacing position; the battery-unloading and battery-changing device 12B is configured to execute the fine adjustment instruction; then, the control unit 11 sends the battery unloading instruction to the battery unloading and replacing device 12B; the battery-discharging battery-changing device 12B is also configured to execute the battery-discharging instruction.

The control unit 11 is further configured to send a battery charging instruction to the battery charging and replacing device 12A after the battery charging and replacing device 12A executes the fifth movement instruction, where the battery charging instruction is used to instruct the battery charging and replacing device 12A to charge the battery to be charged into the electric vehicle. The battery-charging and battery-changing device 12A is also configured to execute the battery-charging instruction. So far, the electric vehicle is completely powered up, and the control unit 11 commands the battery-charging power-exchanging device 12A to leave the preset power-exchanging position.

The power change control system of the embodiment completes partial control in the power change preparation process, greatly shortens the power change time after the electric vehicle is driven into the vehicle carrying platform, and improves the power change efficiency.

Example 8

Fig. 5 shows a power conversion control method of the present embodiment. The power conversion control method comprises the following steps:

and step 21, selecting a battery rack meeting the first condition from at least one battery rack as a first battery rack. Wherein the battery placing rack is provided with a plurality of battery placing bins for placing batteries, and the first condition is that the batteries suitable for the electric vehicle are placed, and the batteries suitable for the electric vehicle are generally the same as the types of the batteries used for the electric vehicle.

And step 22, selecting a battery rack meeting the second condition from the at least one battery rack as a second battery rack. Wherein the second condition is configured to have an empty battery placement bin.

Step 23, configuring at least one of the at least two battery changing devices as a battery charging device. The battery charging and replacing equipment is used for transporting a battery to be charged, wherein the battery to be charged is taken down from the first battery placing frame, is suitable for the electric vehicle and is to be mounted on the electric vehicle.

And step 24, configuring at least one of the at least two battery changing devices as a battery unloading battery changing device. The battery unloading and replacing equipment is used for transporting a battery lack, wherein the battery lack is taken off from the electric vehicle and is to be placed in the empty battery placing bin.

The above-described sequence of steps is only one possible order of the steps, and in other embodiments, the steps may be performed in other sequences, such as performing step 22 first, then performing step 24, step 21, and step 23 sequentially, or performing step 21 first, then performing step 23, step 22, and step 24 sequentially.

In this embodiment, in the whole process of changing electricity for the vehicle, two electricity changing devices are used, namely a battery charging and changing device and a battery discharging and changing device, the moving track of the battery charging and changing device is between the first battery placing frame and the electric vehicle, the transportation of the battery to be charged is realized, the moving track of the battery discharging and changing device is between the electric vehicle and the second battery placing frame, the transportation of the battery lack is realized, the two electricity changing devices respectively have different responsibilities, the electricity changing task is completed jointly, the whole electricity changing time is at least half of the time compared with the time of changing electricity by only adopting one electricity changing device, and the electricity changing speed and the efficiency are improved.

Example 9

The power conversion control method of the present embodiment is a further improvement on the basis of embodiment 8, and is mainly embodied in the setting of the first condition. The first condition is used as a basis for selecting the first battery placing frame, and other preferable matching conditions can be further set besides the necessary placement of the battery suitable for the electric vehicle. In this embodiment, the matching condition is mainly related to the electric quantity of the battery, and the power conversion control method further includes: and monitoring the electric quantity of the battery placed on the battery placing frame.

In particular, the first condition may be set to place a battery suitable for the electric vehicle and full-charged. Correspondingly, the step 21 specifically includes: judging whether a battery placing rack meeting the first condition exists in the at least one battery placing rack, and if so, selecting one of the battery placing racks as the first battery placing rack. If the battery placing rack meeting the first condition does not exist, an alarm signal can be sent out to prompt that the electric vehicle cannot be replaced.

Alternatively, in order to increase the probability of being able to change the electric power for the electric vehicle, the first condition may be preferentially set to place a battery suitable for the electric vehicle and full-charged, and if the at least one battery rack does not have a battery rack that meets the first condition, the first condition is modified to place a battery suitable for the electric vehicle and having the highest electric power. Correspondingly, the step 21 specifically includes: the first condition is set as default that a battery suitable for the electric vehicle and full-charged is placed, whether a battery placing rack meeting the default first condition exists in the at least one battery placing rack is judged, if yes, one battery placing rack is selected from the battery placing racks to serve as the first battery placing rack, and if no, the battery placing rack is selected to serve as the first battery placing rack:

And setting the first condition modification as that a battery which is suitable for the electric vehicle and has the highest electric quantity is placed, judging whether a battery placing rack which accords with the current first condition exists in the at least one battery placing rack again, and if so, selecting one of the battery placing racks as the first battery placing rack. If the battery placing rack meeting the first condition still does not exist, an alarm signal can be sent out to prompt that the electric vehicle cannot be electrified.

In addition, in this embodiment, the battery placement bin may further have a battery charging circuit, so as to charge the batteries, and the battery replacement control method monitors the electric quantity of each battery in real time, so that the selection of the first battery placement frame is facilitated.

Example 10

The battery replacement control method of the present embodiment is a further improvement based on embodiment 8 or 9, and is mainly represented by selection of the first battery holder and the second battery holder. When the number of battery racks is two or more, it is likely that two or more battery racks match the first condition or the second condition at the same time. The battery replacement control method can further set selection requirements of the first battery placing frame and the second battery placing frame according to requirements.

In this embodiment, in order to cope with a case where two or more battery racks simultaneously meet the first condition, step 21 may specifically include:

judging whether more than one battery placing rack accords with the first condition, if so, then:

randomly selecting one battery rack from the battery racks meeting the first condition as the first battery rack;

or, in order to shorten the moving path and moving time of the battery charging device and to increase the charging efficiency, selecting, from the battery racks conforming to the first condition, a battery rack closest to the electric vehicle (if the electric vehicle is not parked yet, a battery rack closest to a loading platform rack for parking the electric vehicle) as the first battery rack.

Of course, if there is only one battery rack meeting the first condition, it is generally only possible to use it as the first battery rack.

Likewise, in order to cope with the case where two or more battery racks simultaneously meet the second condition, step 22 may specifically include:

judging that more than one battery placing rack accords with the second condition, if yes, then:

Randomly selecting one battery rack from the battery racks meeting the second condition as the second battery rack;

or, in order to shorten the moving path and moving time of the battery unloading and changing device and to increase the changing efficiency, selecting, as the second battery rack, a battery rack closest to the electric vehicle from among the battery racks conforming to the second condition (if the electric vehicle is not parked yet, selecting a battery rack closest to a loading platform rack for parking the electric vehicle).

Of course, if there is only one battery rack meeting the second condition, it can be generally used only as the second battery rack.

In order to further facilitate positioning of the positions of the battery placing frames, selection of the first battery placing frame/the second battery placing frame and shortening of the moving path of the battery loading and unloading and changing equipment, the battery placing frames can be arranged on two sides of the vehicle carrying platform along the direction of the electric vehicle driving into the vehicle carrying platform. The vehicle-carrying platform can be a special platform for vehicle power exchange or other common platforms which can be used for parking vehicles and are convenient for power exchange.

In this embodiment, the selection of the first battery rack and the second battery rack is relatively independent, that is, the selection requirements of the first battery rack and the second battery rack may be set according to different requirements.

Example 11

The battery replacement control method of the present embodiment is a further improvement based on embodiment 8 or 9, and is mainly represented by selection of the first battery holder and the second battery holder. Unlike embodiment 10, the correlation between the first battery holder and the second battery holder is considered to some extent in the present embodiment.

The power conversion control method further comprises the following steps:

if not, selecting a first battery rack from the battery racks meeting the first condition and selecting a second battery rack from the battery racks meeting the second condition according to the scheme of embodiment 10;

if so, the multifunctional battery rack is preferably utilized to configure the identity of the multifunctional battery rack in any one of the following four ways:

First, will multi-functional battery rack is simultaneously as first battery rack with the second battery rack.

And secondly, taking the multifunctional battery placing frame as any one of the first battery placing frame and the second battery placing frame.

Thirdly, in order to maintain the balance of the number of the battery placing frames meeting the first condition and the number of the battery placing frames meeting the second condition, any one of the following conditions is taken as a necessary condition for taking the multifunctional battery placing frame as the first battery placing frame:

Fourth, in order to maintain the balance in number between the battery rack conforming to the first condition and the battery rack conforming to the second condition, any one of the conditions is taken as a necessary condition for taking the multifunctional battery rack as the second battery rack:

Example 12

The battery replacement control method of this embodiment is a further improvement based on embodiment 8, and is mainly characterized in that the battery replacement device is assembled in step 23 and the battery replacement device is disassembled in step 24. The power conversion apparatus can be broadly divided into two types:

the single-function battery-changing device is single in structure, can have a first structure and can only be configured as a battery-charging device, or can have a second structure and can only be configured as a battery-discharging device;

The multifunctional battery replacing device is complex in structure, has the first structure and the second structure, and can be configured as any one of battery unloading and battery loading.

The first structure includes a structure required for removing the battery to be mounted from the first battery rack and mounting the battery to the electric vehicle, for example, a grabbing mechanism for removing the battery to be mounted from the first battery rack, a lifting mechanism for mounting the battery to be mounted to the electric vehicle, and the like.

The second structure includes a structure necessary for realizing that the power-shortage battery is taken down from the electric vehicle and placed in the second battery placing frame, for example, an unlocking mechanism for unlocking the power-shortage battery from the electric vehicle, a placing mechanism for placing the power-shortage battery in the second battery placing frame, and the like.

In the power conversion control method of the embodiment, the at least two power conversion devices may be single-function power conversion devices (but the single-function power conversion device with the first structure and the single-function power conversion device with the second structure are required to be both; or, the power supply is multifunctional power conversion equipment; or the single-function power conversion equipment and the multifunctional power conversion equipment are adopted.

In order to shorten the moving path and moving time of the battery-mounted battery-powered device and to increase the power exchanging efficiency, the battery-mounted battery-powered device configured in step 23 is preferably the battery-powered device closest to the first battery holder. Specifically, step 23, performed after the first battery rack is selected in step 21, may include: and determining the position of the first battery placing frame, screening the single-function battery changing equipment and the multi-function battery changing equipment with the first structure, respectively calculating the distance between each single-function battery changing equipment and the multi-function battery changing equipment with the first structure and the first battery placing frame, and selecting one battery changing equipment with the nearest distance to be configured as battery charging battery changing equipment.

In order to shorten the movement path and movement time of the battery-unloading battery-changing device and to increase the battery-changing efficiency, the battery-changing device configured as the battery-unloading battery-changing device in step 24 is preferably the closest battery-changing device to the electric vehicle (if the electric vehicle is not already parked, it is preferably the closest battery-changing device to the loading platform for parking the electric vehicle). Specifically, step 24 may include: screening the single-function power conversion equipment and the multi-function power conversion equipment with the second structures, respectively calculating the distance between each single-function power conversion equipment and the multi-function power conversion equipment with the second structures and the electric vehicle (if the electric vehicle is not parked, respectively calculating the distance between the screened power conversion equipment and the vehicle carrying platform), and selecting the power conversion equipment closest to the screened power conversion equipment to be configured as the battery unloading power conversion equipment.

In step 23, when the battery exchange device is configured, it is preferable that the battery exchange device has a binding relationship with the first battery rack, or the battery exchange device has a binding relationship with the first battery rack and is closest to the first battery rack. Specifically, step 23 may include: after the first battery placing frame is selected, single-function battery replacing equipment and multi-function battery replacing equipment which have binding relation with the first battery placing frame and have a first structure are selected, one battery replacing equipment is selected randomly from the single-function battery replacing equipment and the multi-function battery replacing equipment, or the position of the first battery placing frame is further determined, the distance between the selected battery replacing equipment and the first battery placing frame is calculated respectively, and the battery replacing equipment with the nearest distance is selected and configured as the battery replacing equipment.

Step 24, when configuring the battery-unloading battery-powered device, is preferably a battery-powered device having a binding relationship with the second battery rack, or a battery-powered device having a binding relationship with the second battery rack and closest to the electric vehicle (preferably a battery-powered device having a binding relationship with the second battery rack and closest to a vehicle-carrying platform rack for parking the electric vehicle if the electric vehicle is not yet parked). Specifically, step 24 may include: after the second battery placing frame is selected, screening single-function battery replacing equipment and multifunctional battery replacing equipment which have binding relation with the second battery placing frame and have a second structure, randomly selecting one battery unloading battery replacing equipment from the single-function battery replacing equipment or further respectively calculating the distance between the screened battery replacing equipment and the electric vehicle (the distance between the screened battery replacing equipment and the vehicle carrying platform is calculated if the battery vehicle is not parked), and selecting the battery unloading battery replacing equipment as the nearest battery replacing equipment.

Example 13

The power conversion control method of the present embodiment is a further improvement based on embodiment 8, and is mainly embodied in the power conversion control flow of the power conversion control method. As shown in fig. 6, the power change control flow in this embodiment is divided into a power change preparation flow before the electric vehicle is parked on the carrier platform and a power change operation flow after the electric vehicle is parked on the carrier platform.

In a power conversion preparation flow, the power conversion control method comprises the following steps: and pre-selecting the second battery placing rack, and then configuring battery unloading and replacing equipment. The method for selecting the second battery holder may be referred to in embodiments 9-11, and the method for configuring the battery-unloading battery-replacing device may be referred to in embodiment 12.

In a power conversion operation flow, the power conversion control method comprises the following steps: and commanding the battery unloading and power changing equipment to move and park at a preset power changing position.

After the electric vehicle is parked on the vehicle loading platform and the battery unloading and power exchanging device is parked on the preset power exchanging position, the battery unloading and power exchanging device is instructed to take off the power shortage battery from the electric vehicle.

In this embodiment, the preset power exchange position is a position suitable for taking the battery from the electric vehicle parked on the vehicle loading platform, and it can be understood that when the battery unloading power exchange device is located at the preset power exchange position, the battery unloading power exchange device can take the battery from the electric vehicle parked on the vehicle loading platform through a minimum action. The preset power change position may specifically be determined to be located below or above the vehicle platform according to the structure of the vehicle platform (for a specific description of the preset power change position, refer to embodiment 6).

The preset battery replacement position can be further set according to the structure of the vehicle carrying platform and the conditions of a second structure of the battery unloading and replacing equipment, a moving path of the second structure when the battery is in a shortage state, and the like.

After the battery-unloading battery-changing device removes the battery-out from the electric vehicle, the battery-unloading battery-changing device is commanded to move to the second battery-placing rack and place the battery-out in the empty battery-placing bin.

In the power conversion operation flow, the power conversion control method further comprises the following steps: and selecting the first battery placing frame, then configuring battery charging equipment, and commanding the battery charging equipment to take off the battery to be charged from the first battery placing frame. The method for selecting the first battery holder may be referred to in embodiments 9-11, and the method for configuring the battery exchange device may be referred to in embodiment 12.

And after the battery unloading and replacing equipment leaves the preset power replacing position or leaves the preset power replacing position to exceed a third distance threshold value, commanding the battery loading and replacing equipment to move to the preset power replacing position.

And after the battery charging and replacing equipment moves to the preset voltage changing position, commanding the battery charging and replacing equipment to charge the battery to be charged into the electric vehicle. So far, the electric vehicle is completely electrified.

And finally, commanding the battery-charging power-changing equipment to leave the preset power-changing position.

Example 14

The power conversion control method of the present embodiment is a further improvement based on embodiment 8, and is mainly embodied in the power conversion control flow of the power conversion control method. In this embodiment, the power change control process is divided into a power change preparation process before the electric vehicle is parked on the vehicle platform and a power change operation process after the electric vehicle is parked on the vehicle platform. As shown in fig. 7, in the power change preparation flow and the power change operation flow, the power change control method includes steps different from those of embodiment 13.

In a power conversion preparation flow, the power conversion control method comprises the following steps: and pre-selecting the second battery placing frame, configuring the battery unloading and battery changing equipment and commanding the battery unloading and battery changing equipment to complete a part of operations so as to save the battery unloading time. The method for selecting the second battery holder may be referred to in embodiments 9-11, and the method for configuring the battery-unloading battery-replacing device may be referred to in embodiment 12.

Wherein commanding the battery discharging and battery changing device to complete a portion of operations includes: judging whether the preset battery replacement position is in a parking state or not, thereby setting a second preset waiting position, and commanding the battery unloading battery replacement device to park in the second preset waiting position in advance. Wherein the second preset waiting position is related to the preset power change position, and may be the same position as the preset power change position or a position near the preset power change position (for a specific description of the preset power change position, see embodiment 6).

condition (1): the preset power change position is a vacancy;

condition (2): a passage for the battery unloading and replacing equipment to move to the preset power replacing position exists;

condition (3): when the battery unloading and battery replacing equipment is predicted to be parked at the preset power replacing position, the battery unloading and battery replacing equipment cannot block an electric vehicle entering the vehicle carrying platform.

In this embodiment, if the battery model to which the electric vehicle is applicable is predictable before the electric vehicle is parked on the vehicle-mounted platform, in the power-change preparation process, the power-change control method further includes: and pre-selecting the first battery placing frame, configuring the battery charging and replacing equipment and commanding the battery charging and replacing equipment to complete a part of operations so as to save battery charging time. The method for selecting the second battery holder may be referred to in embodiments 9-11, and the method for configuring the battery-unloading battery-replacing device may be referred to in embodiment 12. In addition, the battery model to which the electric vehicle is applicable can be predicted by: the vehicle-mounted platform is limited to parking an electric vehicle to which the model of battery is applicable. For example, if a certain vehicle platform is preset to be parked only for an electric vehicle of a certain model of battery, then whether or not the electric vehicle is already parked on the vehicle platform can be determined that the model of battery to which the electric vehicle is applicable must be the certain model.

Wherein commanding the battery-powered battery-changing device to complete a portion of operations includes: and commanding the battery charging and replacing equipment to take off the battery to be charged from the first battery placing frame.

After the battery charging and replacing equipment takes down the battery to be charged from the first battery placing frame, commanding the battery charging and replacing equipment to be parked in a first preset waiting position in advance, wherein the first preset waiting position is the vicinity of the vehicle carrying platform and is a position which is not more than a first distance threshold from the vehicle carrying platform.

And the power exchange preparation process is finished, and the electric vehicle is waited to drive in and park on the vehicle carrying platform so as to enter the power exchange operation process.

In a power conversion operation flow, the power conversion control method comprises the following steps: judging whether a second preset waiting position where the battery unloading and power changing equipment is located is the same as the preset power changing position or not:

if yes, the battery unloading and replacing equipment is instructed to take down the battery lack from the electric vehicle;

if not, the battery unloading and power changing equipment is instructed to move from the second preset waiting position to the preset power changing position; then, the battery-discharging and battery-changing device is instructed to remove the battery-lacking battery from the electric vehicle.

After the battery unloading and replacing equipment executes the battery unloading instruction, the battery unloading and replacing equipment is instructed to move to the second battery placing rack, and the battery without electricity is placed in the empty battery placing bin.

And after the battery charging and replacing equipment moves to the preset power replacing position, commanding the battery charging and replacing equipment to charge the battery to be charged into the electric vehicle. So far, the electric vehicle is completely electrified.

And commanding the battery-charging power-changing equipment to drive away from the preset power-changing position.

The power change control method of the embodiment completes partial control in the power change preparation process, greatly shortens the power change time after the electric vehicle is driven into the vehicle carrying platform, and improves the power change efficiency.

While specific embodiments of the invention have been described above, it will be appreciated by those skilled in the art that these are by way of example only, and the scope of the invention is defined by the appended claims. Various changes and modifications to these embodiments may be made by those skilled in the art without departing from the principles and spirit of the invention, but such changes and modifications fall within the scope of the invention.

Claims

1. A power conversion control system, comprising: the control unit and at least two power conversion devices;

the control unit is used for selecting a battery placing rack meeting a first condition from at least one battery placing rack as a first battery placing rack, selecting a battery placing rack meeting a second condition from the at least one battery placing rack as a second battery placing rack, wherein the first battery placing rack and/or the second battery placing rack is provided with a plurality of battery placing bins for placing batteries, the first condition is set to be used for placing batteries suitable for electric vehicles, and the second condition is set to be provided with empty battery placing bins;

the battery unloading and replacing equipment is used for transporting a battery which is taken off from the electric vehicle and is to be placed in the empty battery placing bin;

The first battery placing rack and/or the second battery placing rack are/is arranged on two sides of the vehicle carrying platform along the direction of the electric vehicle driving into the vehicle carrying platform of the electric vehicle;

if there is a multifunctional battery rack in the at least one battery rack, the multifunctional battery rack is a battery rack in which the first condition and the second condition are both met, the control unit is further configured to:

all the rest of the battery placing racks do not meet the first condition;

the rest of the battery placing racks do not meet the second condition;

2. The power conversion control system according to claim 1, wherein the control unit is further configured to monitor an amount of power of a battery placed on the battery rack;

or, the first condition is set to be that a battery which is suitable for the electric vehicle and is full of electricity is placed, and if the battery placing frame which accords with the first condition is not arranged in the at least one battery placing frame, the first condition is modified to be that a battery which is suitable for the electric vehicle and has the highest electric quantity is placed.

3. The battery changing control system according to claim 1 or 2, wherein the control unit is further configured to, when more than one battery rack meets the first condition, randomly select one battery rack from among the battery racks meeting the first condition as the first battery rack, or select one battery rack closest to the electric vehicle or a loading platform for parking the electric vehicle as the first battery rack;

4. The battery change control system of claim 1, wherein the battery placement compartment is further configured to charge a battery.

5. The power conversion control system of claim 1, wherein the at least two power conversion devices are each a single-function power conversion device;

Or, the power supply is multifunctional power conversion equipment;

6. The battery change control system of claim 1, wherein the battery change device configured as the battery-charged battery change device is the closest battery change device to the first battery rack;

7. The battery change control system of claim 1, wherein the battery model for which the electric vehicle is adapted is predictable if prior to the electric vehicle being parked on the vehicle platform:

8. The battery change control system according to claim 7, wherein the battery model to which the electric vehicle is applicable is predicted by: the vehicle-mounted platform is limited to parking an electric vehicle to which the model of battery is applicable.

9. The battery change control system of claim 1, wherein the control unit is further configured to send a second movement instruction to the battery-unloading battery-changing device before the electric vehicle is parked on the vehicle-carrying platform, the second movement instruction being configured to instruct the battery-unloading battery-changing device to be parked in a second preset waiting position in advance; the battery unloading and replacing device is further used for executing the second movement instruction.

10. The power change control system according to claim 9, wherein when a preset power change position is a moored state, the second preset waiting position and the preset power change position are the same position, and the preset power change position is a position suitable for taking a battery from an electric vehicle moored to the vehicle loading platform.

11. The power change control system according to claim 9, wherein when a preset power change position is an undetachable state, the second preset standby position is a position that is not more than a second distance threshold from the preset power change position, the preset power change position being a position suitable for taking a battery from an electric vehicle parked on the vehicle mount platform;

12. The power conversion control system according to claim 10 or 11, characterized in that the preset power conversion position is a moored state when the following conditions are simultaneously satisfied, otherwise the preset power conversion position is a non-moored state:

the preset power change position is a vacancy;

13. The power change control system according to claim 10 or 11, wherein the preset power change position is determined to be located below or above the vehicle-mounted platform according to a structure of the vehicle-mounted platform.

14. The battery change control system of claim 1, wherein the control unit is further configured to send a third movement instruction to the battery unloading and changing device after the electric vehicle is parked on the vehicle loading platform, the third movement instruction being configured to instruct the battery unloading and changing device to move and park in a preset power change position, the preset power change position being a position suitable for taking a battery from the electric vehicle parked on the vehicle loading platform; the battery unloading and replacing device is further used for executing the third movement instruction.

15. The battery change control system according to any one of claims 10, 11, 14, wherein the control unit is further configured to send a battery removal instruction to the battery removal battery changing device for instructing the battery removal battery changing device to remove the battery out of the electric vehicle after the electric vehicle is parked at the vehicle loading platform and the battery removal battery changing device is parked at the preset battery change position;

16. The battery change control system according to any one of claims 10, 11, 14, wherein the control unit is further configured to send a fifth movement instruction to the battery-filled battery change device after the battery-discharged battery change device leaves the preset battery change position or leaves the preset battery change position beyond a third distance threshold, the fifth movement instruction being configured to instruct the battery-filled battery change device to move to the preset battery change position;

17. A power conversion control method, characterized by comprising:

at least one battery replacing device of the at least two battery replacing devices is configured as a battery charging and replacing device, and the battery charging and replacing device is used for transporting a battery to be charged, wherein the battery to be charged is taken off from the first battery placing frame, is suitable for the electric vehicle and is to be mounted on the electric vehicle;

At least one of the at least two battery changing devices is configured as a battery unloading battery changing device, and the battery unloading battery changing device is used for transporting a battery which is taken off from the electric vehicle and is to be placed in the empty battery placing bin;

the power conversion control method further comprises the following steps:

if present, then:

all the rest of the battery placing racks do not meet the first condition;

the rest of the battery placing racks do not meet the second condition;

18. The power conversion control method according to claim 17, characterized in that the power conversion control method further comprises: monitoring the electric quantity of a battery placed on the battery placing frame;

19. The power conversion control method according to claim 17 or 18, characterized in that the power conversion control method further comprises:

20. The power conversion control method according to claim 17, wherein the at least two power conversion devices are each a single-function power conversion device;

or, the power supply is multifunctional power conversion equipment;

21. The battery change control method of claim 17, wherein the battery change device configured as the battery-equipped battery change device is a battery change device nearest to the first battery rack;

22. The power conversion control method according to claim 17, wherein if the battery model to which the electric vehicle is applicable is predictable before the electric vehicle is parked on a vehicle loading platform;

the power conversion control method further comprises the following steps:

23. The battery change control method according to claim 22, characterized in that the battery model to which the electric vehicle is applicable is predicted by: the vehicle-mounted platform is limited to parking an electric vehicle to which the model of battery is applicable.

24. The power conversion control method according to claim 17, characterized in that the power conversion control method further comprises:

25. The power change control method according to claim 24, wherein when a preset power change position is a moored state, the second preset waiting position and the preset power change position are the same position, and the preset power change position is a position suitable for taking a battery from an electric vehicle moored to the vehicle loading platform.

26. The power change control method according to claim 24, wherein when a preset power change position is an undetachable state, the second preset waiting position is a position that is not more than a second distance threshold from the preset power change position, the preset power change position being a position suitable for taking a battery from an electric vehicle parked on the vehicle mount platform;

27. The power conversion control method according to claim 25 or 26, characterized in that the preset power conversion position is a moored state when the following conditions are simultaneously satisfied, otherwise the preset power conversion position is a non-moored state:

The preset power change position is a vacancy;

28. The power conversion control method according to claim 25 or 26, wherein the preset power conversion position is determined to be located below or above the vehicle-mounted platform according to a structure of the vehicle-mounted platform.

29. The power conversion control method according to claim 17, characterized in that the power conversion control method further comprises:

30. The power conversion control method according to any one of claims 25, 26, 29, characterized in that the power conversion control method further comprises:

31. The power conversion control method according to any one of claims 25, 26, 29, characterized in that the power conversion control method further comprises: