A charger and a power distribution method and power distribution device thereof

Abstract

The application relates to a charger and a power distribution method and a power distribution device thereof, the method comprising the following steps: determining the required power and the required current of a vehicle to be charged; determining the rated power and the maximum current of each charging module in the charger; calculating the number of required charging modules based on the required power and the rated power, or the required current and the maximum current; selecting the required charging modules in the charger based on a preset selection principle, combining the selected charging modules, and obtaining combined charging modules; and calling the combined charging modules to charge the vehicle to be charged. The application determines the number of required charging modules in advance, and then selects the required charging modules in the charger based on the preset selection principle, so that the problem of charging power redundancy caused by unreasonable charging power distribution is reduced.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of electric vehicle chargers, in particular to a charger and a power distribution method and device thereof. BACKGROUND

[0002] With the popularity of electric vehicles, chargers have emerged. The charger can provide charging services for electric vehicles, but different models of vehicles require different power. In order to meet the fast charging needs of users, the chargers on the market currently adopt various power distribution topologies, such as full matrix, ring, etc. In order to reduce the cost of the charger, high-power charging modules are generally used. Under this background, even if the full matrix topology with the current optimal technology in the industry is used, the charging power will be redundant and cannot be effectively used during the charging process. There is no way to distribute this part of the wasted charging power to other vehicles, which not only wastes charging power resources, but also affects the charging experience of other users. SUMMARY

[0003] Therefore, it is necessary to provide a charger and a power distribution method and device thereof to solve the problem of charging power redundancy caused by unreasonable charging power distribution in the prior art.

[0004] In order to solve the above problems, in a first aspect, the present application provides a charger power distribution method, comprising:

[0005] determining the required power and current of a vehicle to be charged;

[0006] determining the rated power and maximum current of each charging module in the charger;

[0007] calculating the number of required charging modules based on the required power and the rated power, or the required current and the maximum current;

[0008] selecting each required charging module in the charger based on a preset selection principle, and merging each selected charging module to obtain a merged charging module;

[0009] calling the merged charging module to charge the vehicle to be charged.

[0010] Further, the first number of required charging modules is calculated based on the required power and the rated power, comprising:

[0011] calculating the first number of required charging modules according to the first ratio of the required power and the rated power;

[0012] The second number of required charging modules is calculated based on the required current and the maximum current, comprising:

[0013] a second number of required charging modules is calculated according to a second ratio of the required current and the maximum current.

[0014] Further, if the first number is greater than the second number, the first number is taken as the number of required charging modules.

[0015] If the second number is greater than the first number, the second number is taken as the number of required charging modules.

[0016] If the first number is equal to the second number, the first number or the second number is taken as the number of required charging modules.

[0017] Further, the selecting required charging modules in the charger based on a preset selection principle comprises:

[0018] selecting required charging modules based on a preset selection order and an operating state of each charging module.

[0019] Further, the merging of the selected charging modules comprises:

[0020] merging the selected charging modules in parallel operation.

[0021] Further, the demand power and the demand current of the vehicle to be charged are determined based on a vehicle nameplate of the vehicle to be charged.

[0022] Further, the current value provided by each charging module in the charger is within a preset range.

[0023] In a second aspect, the present application further provides a charger power distribution device, comprising:

[0024] a first determining module configured to determine the demand power and the demand current of the vehicle to be charged;

[0025] a second determining module configured to determine the rated power and the maximum current of each charging module in the charger;

[0026] a calculating module configured to calculate a number of required charging modules based on the demand power and the rated power, or the demand current and the maximum current;

[0027] a selecting module configured to select required charging modules in the charger based on a preset selection principle, and to merge the selected charging modules to obtain a merged charging module;

[0028] a calling module configured to call the merged charging module to charge the vehicle to be charged.

[0029] In a third aspect, the present application provides a charger, comprising a memory and a processor, wherein the memory is configured to store a program; and the processor is coupled to the memory and configured to execute the program stored in the memory to implement the steps of the power distribution method.

[0030] In a fourth aspect, the present application provides a computer readable storage medium for storing computer readable program or instructions, which, when executed by a processor, can implement the steps of the charger power distribution method.

[0031] The beneficial effects of the above embodiments are as follows:

[0032] The present application determines the required power and current of the vehicle to be charged, the rated power and maximum current of each charging module, so as to calculate the number of charging modules required by the vehicle to be charged from the power angle or current angle, and ensure the use experience of the electric vehicle user; then the combined charging module with any power in the charger is selected according to the preset selection principle, and the required charging module is combined, so as to reduce the charging power redundancy and improve the charging experience of other users. BRIEF DESCRIPTION OF DRAWINGS

[0033] Figure 1 A flowchart of an embodiment of the charger power distribution method provided by the present application is shown in the figure.

[0034] Figure 2 A topology diagram of the charging module in the charger provided by an embodiment of the present application is shown in the figure.

[0035] Figure 3 A structure diagram of an embodiment of the charger power distribution device provided by the present application is shown in the figure.

[0036] Figure 4 A structure diagram of an embodiment of the charger provided by the present application is shown in the figure. DETAILED DESCRIPTION

[0037] The preferred embodiments of the present application will be described in detail below with reference to the accompanying drawings, wherein the drawings constitute a part of the present application and serve to explain the principles of the embodiments of the present application, but are not intended to limit the scope of the present application.

[0038] In the description of the present application, the terms "first", "second", are only for descriptive purpose, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined with "first", "second" can explicitly or implicitly include at least one of the features. In addition, the meaning of "multiple" is two or more, unless otherwise specifically limited. In this paper, the reference to "embodiments" means that the specific features, structures or properties described in conjunction with the embodiments can be included in at least one embodiment of the present application. The appearance of this phrase in various places in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment to other embodiments. Those skilled in the art explicitly and implicitly understand that the embodiments described herein can be combined with other embodiments.

[0039] Before the embodiment is described, the relevant terms are explained:

[0040] The charger is adopted high frequency power supply technology, and uses advanced intelligent dynamic adjustment charging technology. It adopts constant current / constant voltage / small constant current intelligent three stage charging mode, and has the characteristics of high charging efficiency, simple operation, light weight, small size and the like. In practical application, selecting different charger charging modes according to the limitation of battery capacity is an inevitable choice to prolong the service life of the storage battery. There are many charging methods for lithium ion battery charger, the simplest one is constant voltage charger charging method. At present, the most widely used in electric vehicle charging is power frequency charger and high frequency charger. The characteristics of power frequency charger are: large size, heavy weight, high power consumption, but reliable performance, low price.

[0041] The following will be described in detail:

[0042] Please refer to Figure 1 , Figure 1 The flowchart of an embodiment of the charger power distribution method provided by the present application, one specific embodiment of the present application discloses a charger power distribution method, comprising:

[0043] Step S101: determining the demand power and demand current of the vehicle to be charged;

[0044] Step S102: determining the rated power and maximum current of each charging module in the charger;

[0045] Step S103: calculating the number of required charging modules based on the demand power and the rated power, or the demand current and the maximum current;

[0046] Step S104: selecting each required charging module in the charger based on a preset selection principle, and merging the selected each charging module to obtain a merged charging module;

[0047] Step S105: calling the combined charging module to charge the vehicle to be charged.

[0048] It can be understood that, due to different vehicle models of electric vehicles, the required power and the required current of each vehicle to be charged are different. Specifically, the required power and the required current of the vehicle to be charged can be obtained by checking the vehicle nameplate. The charging demand voltage, the charging demand current and the charging demand power can also be obtained by communicating between the charging machine and the electric vehicle when starting charging.

[0049] It should be noted that the charging machine in the embodiment of the application includes a plurality of charging modules, and the number of charging modules can be selected according to the demand of the vehicle to be charged, so as to reasonably utilize the charging resources. Specifically, the rated power and the maximum current of each charging module in the charging machine can be determined, and then the number of required charging modules can be calculated based on the required power and the rated power, or the required current and the maximum current. In addition, the current value that each charging module can provide is within a preset range. Therefore, the actual charging condition of the vehicle to be charged can be dynamically changed during the charging process, so as to achieve the effect of reducing the power redundancy.

[0050] After determining the number of charging modules, the required charging modules can be selected in the charging machine based on a preset selection principle, and the selected charging modules are combined to obtain a combined charging module. It can be understood that, by combining any charging module, the charging power can be increased. Finally, the combined charging module is called to charge the vehicle to be charged.

[0051] The application determines the required power and the required current of the vehicle to be charged, and the rated power and the maximum current of each charging module, so as to calculate the number of required charging modules for the vehicle to be charged from the power angle or the current angle, thereby ensuring the use experience of the electric vehicle user. Then, the combined charging module with any power can be combined in the charging machine based on the characteristics of the combined charging module, the required charging modules are selected in the charging machine according to the preset selection principle, and the charging modules are combined, thereby reducing the charging power redundancy and improving the charging experience of other users.

[0052] In an embodiment of the application, the first number of required charging modules is calculated based on the required power and the rated power, including:

[0053] The first number of required charging modules is calculated according to the first ratio of the required power to the rated power.

[0054] The second number of required charging modules is calculated based on the required current and the maximum current, including:

[0055] The second number of required charging modules is calculated according to the second ratio of the required current to the maximum current.

[0056] If the first number is greater than the second number, the first number is taken as the number of required charging modules;

[0057] If the second number is greater than the first number, the second number is taken as the number of required charging modules;

[0058] If the first number is equal to the second number, the first number or the second number is taken as the number of required charging modules.

[0059] It can be understood that the number of required charging modules is calculated based on the power limitation and current limitation characteristics of the charging modules. Specifically, when the first number of charging modules is estimated based on the power platform, it is assumed that the current demand power is PQ, and the rated power of each charging module is PM, and the first number K1 is estimated as PQ / PM; when the second number of charging modules is estimated based on the current platform, it is assumed that the current demand current is IQ, and the maximum current of each charging module is IM, and the second number K2 is estimated as IQ / IM. Then compare the power platform estimation value and the current platform estimation value. And take the larger value as the charging module demand value K, in order to ensure the user experience of the vehicle owner to be charged.

[0060] In an embodiment of the present application, the required charging module is selected in the charger based on a preset selection principle, comprising:

[0061] The required charging module is selected based on a preset selection order and the working state of each charging module.

[0062] The selected charging modules are combined, comprising:

[0063] The selected charging modules are combined in parallel operation.

[0064] Among them, please refer to Figure 2 , Figure 2 A topology diagram of charging modules in a charger is provided for an embodiment of the present application. Wherein the circle is a charging module, also known as a power unit, and the connection between the circles is a switching unit. Each charging module can be connected to an output. There is one or more charging modules with a front and rear relationship between the charging modules, and multiple series are connected in parallel to form a specific relationship form.

[0065] The charging module can collect the power (less than or equal to the total power) of any unit to one place through the switching unit, increasing the charging power. And compared with other topological structures, the grid topological structure in the present application has fewer switching units, which can improve the parallel operation efficiency.

[0066] For example, please refer to Figure 2 :

[0067] If the charging demand is 1 charging module, after starting the a module, it is judged that the charging machine can output power PM and can output current IM, and according to the comparison of the charging demand, it can be seen that the demand has been met after starting the a module, so other modules do not need to be merged, and the a module can be started to charge the vehicle to be charged.

[0068] If the charging demand is 2 charging modules. After starting the a module, it is judged that the charging machine can output power PM and can output current IM, and according to the comparison of the charging demand, it does not meet the demand, so according to the preset selection order, that is, the selection order of first right and then down, the b module is selected from the right side of the a module, and then the current state of the b module is judged. If the b module is in the working state, no operation is performed, then the e module is selected from the lower side of the a module, and then the e module state is judged. If the e module is in the working state, no operation is performed, and the machine ends.

[0069] Assuming that the b module is in a non-working state, the switching unit between a and b is closed, and the b module is started. At this time, the system can output power is 2PM, and the system can output current is 2IM. According to the comparison of the charging demand, it is met, so other modules do not need to be merged. That is, the a and b modules can be started to charge the vehicle to be charged.

[0070] If the charging demand is 3 charging modules. After starting the a module, it is judged that the charging machine can output power PM and can output current IM, and according to the comparison of the charging demand, it does not meet the demand, so according to the preset selection order, that is, the selection order of first right and then down, the b module is selected from the right side of the a module, and then the current state of the b module is judged. If the b module is in the working state, no operation is performed, then the e module is selected from the lower side of the a module, and then the e module state is judged. If the e module is in the working state, no operation is performed, and the machine ends.

[0071] Assuming that the b module is in a non-working state, the switching unit between a and b is closed, and the b module is started. At this time, the system can output power is 2PM, and the system can output current is 2IM. According to the comparison of the charging demand, it does not meet the demand.

[0072] Assuming that the e module is in a non-working state, the switching unit between a and e is closed, and the e module is started. At this time, the system can output power is 3PM, and the system can output current is 3IM. According to the comparison of the charging demand, it is met, so other modules do not need to be merged. That is, the a, b and e modules can be started to charge the vehicle to be charged.

[0073] Assuming e module is in working state, judge c, f state. If c, f is in working state, and machine end. Assuming c module is in non-working state, f module is in working state. Then close b, c between switching unit, start c module. At this time the system can output power is 3PM, can output current is 3IM, according to the charging demand comparison, meet then need to be integrated into other modules. Namely start a, b, c module to the vehicle to be charged charging.

[0074] Assuming f module is in non-working state, c module is in working state. Then close b, f between switching unit, start f. At this time the system can output power is 3PM, can output current is 3IM, according to the charging demand comparison, meet then need to be integrated into other modules. Namely start a, b, f module to the vehicle to be charged charging.

[0075] If the charging demand is 4 charging module. Start a module after judging the charging machine output power PM, can output current IM, according to the charging demand comparison, not meet the demand, therefore according to the preset selection order, namely first right after the selection order of down selection order from a module right side selection b module, and then judge the current state of b module, if b module is in working state, then do not operate, then from a module below selection e module, and then judge e module state, if e module is in working state, then do not operate, and machine end.

[0076] Assuming b module is in non-working state, then close a, b between switching unit, start b module. At this time the system can output power is 2PM, can output current is 2IM, according to the charging demand comparison and do not meet. Then judge c module state, if c module is in working state, then do not operate.

[0077] Assuming e module is in non-working state, then close a, e between switching unit, start e module. At this time the system can output power is 2PM, can output current is 2IM, according to the charging demand comparison and do not meet. Then judge i module state, if i module is in working state, then do not operate.

[0078] Assuming c module is in non-working state, then close b, c between switching unit, start c module. At this time the system can output power is 3PM, can output current is 3IM, according to the charging demand comparison and do not meet. Then judge d module state, if d module is in working state, then do not operate.

[0079] Assuming i module is in non-working state, then close e, i between switching unit, start i module. At this time the system can output power is 3PM, can output current is 3IM, according to the charging demand comparison and do not meet. Then judge j module state, if j module is in working state, then do not operate.

[0080] Assuming the d module is in a non-working state, the switching unit between c and d is closed, and the d module is started. At this time, the system can output power of 4PM and output current of 4IM. According to the charging demand comparison, if it is satisfied, other modules do not need to be merged. That is, the a, b, c and d modules can be started to charge the vehicle to be charged.

[0081] Assuming the j module is in a non-working state, the switching unit between i and j is closed, and the j module is started. At this time, the system can output power of 4PM and output current of 4IM. According to the charging demand comparison, if it is satisfied, other modules do not need to be merged. That is, the a, e, i and j modules can be started to charge the vehicle to be charged.

[0082] If the charging demand is 5 charging modules, the a module is started, and the charging machine output power PM and output current IM are judged. According to the charging demand comparison, it does not meet the demand, so according to the preset selection order, that is, the selection order of right first and then down, the b module is selected from the right side of the a module, and then the current state of the b module is judged. If the b module is in a working state, no operation is performed, then the e module is selected from the lower side of the a module, and then the state of the e module is judged. If the e module is in a working state, no operation is performed, and the machine ends.

[0083] Assuming the b module is in a non-working state, the switching unit between a and b is closed, and the b module is started. At this time, the system can output power of 2PM and output current of 2IM. According to the charging demand comparison, it does not meet the demand. The state of the c module is judged. If the c module is in a working state, no operation is performed.

[0084] Assuming the e module is in a non-working state, the switching unit between a and e is closed, and the e module is started. At this time, the system can output power of 2PM and output current of 2IM. According to the charging demand comparison, it does not meet the demand. The state of the i module is judged. If the i module is in a working state, no operation is performed.

[0085] Assuming the c module is in a non-working state, the switching unit between b and c is closed, and the c module is started. At this time, the system can output power of 3PM and output current of 3IM. According to the charging demand comparison, it does not meet the demand. The state of the d module is judged. If the d module is in a working state, no operation is performed.

[0086] Assuming the i module is in a non-working state, the switching unit between e and i is closed, and the i module is started. At this time, the system can output power of 3PM and output current of 3IM. According to the charging demand comparison, it does not meet the demand. The state of the j module is judged. If the j module is in a working state, no operation is performed.

[0087] Assuming that the d module is in a non-working state, the switching unit between c and d is closed, and the d module is started. At this time, the system can output power of 4PM, and the output current is 4IM. According to the charging demand comparison, it is not satisfied, and the h module state is judged. If the h module is in a working state, no operation is performed.

[0088] Assuming that the j module is in a non-working state, the switching unit between i and j is closed, and the j module is started. At this time, the system can output power of 4PM, and the output current is 4IM. According to the charging demand comparison, it is not satisfied, and the k module state is judged. If the k module is in a working state, no operation is performed.

[0089] Assuming that the h module is in a non-working state, the switching unit between d and h is closed, and the h module is started. At this time, the system can output power of 5PM, and the output current is 5IM. According to the charging demand comparison, it is satisfied, and no other module needs to be integrated. That is, the a, e, c, d, and h modules can be started to charge the vehicle to be charged.

[0090] Assuming that the k module is in a non-working state, the switching unit between j and k is closed, and the k module is started. At this time, the system can output power of 5PM, and the output current is 5IM. According to the charging demand comparison, it is satisfied, and no other module needs to be integrated. That is, the a, e, i, j, and k modules can be started to charge the vehicle to be charged.

[0091] In order to better implement the charging machine power distribution method in the embodiment of the application, on the basis of the charging machine power distribution method, please refer to Figure 3 , Figure 3 The embodiment of the charging machine power distribution device provided by the application provides a charging machine power distribution device 300, which comprises:

[0092] A first determination module 301 is configured to determine the demand power and the demand current of the vehicle to be charged.

[0093] A second determination module 302 is configured to determine the rated power and the maximum current of each power unit in the charging machine.

[0094] A calculation module 303 is configured to calculate the number of required power units based on the demand power and the rated power, or the demand current and the maximum current.

[0095] A selection module 304 is configured to select each required charging module in the charging machine based on a preset selection principle, and combine the selected charging modules to obtain a combined charging module.

[0096] A calling module 305 is configured to call the combined charging module to charge the vehicle to be charged.

[0097] It should be noted that the apparatus 300 provided in the above embodiments can implement the technical solutions described in the above method embodiments, and the principles of the implementation of the above modules or units can be referred to the corresponding content in the above method embodiments, which will not be described here.

[0098] The application further provides a charger 400, comprising a processor 401 and a memory 402, and a computer program 403 stored in the memory and executable on the processor; when the processor executes the computer program, the steps in the charger power distribution method according to the above embodiments are implemented.

[0099] Based on the charger power distribution method, the application further provides a computer readable storage medium storing one or more programs, which can be executed by one or more processors to implement the steps in the charger power distribution method according to the above embodiments.

[0100] Those skilled in the art can understand that all or part of the processes of the above embodiments can be completed by a computer program instructing relevant hardware, and the program can be stored in a computer readable storage medium. The computer readable storage medium includes a magnetic disk, an optical disk, a read-only memory, a random access memory, etc.

[0101] The above description is only the preferred embodiment of the application, but the protection scope of the application is not limited to this. Any changes or replacements within the technical scope disclosed by the application should be covered within the protection scope of the application.

Claims

1. A charger power distribution method, characterized in that, The method comprises the following steps: determining the required power and the required current of the vehicle to be charged; determining the rated power and the maximum current of each charging module in the charger; calculating the number of required charging modules based on the required power and the rated power, or the required current and the maximum current, comprising: calculating a first number of required charging modules according to a first ratio of the required power to the rated power; calculating a second number of required charging modules according to a second ratio of the required current to the maximum current; if the first number is greater than the second number, taking the first number as the number of required charging modules; if the second number is greater than the first number, taking the second number as the number of required charging modules; if the first number is equal to the second number, taking the first number or the second number as the number of required charging modules, wherein a plurality of charging modules in the charger are connected in a grid topology structure, and the grid topology structure is a grid topology structure with 12 charging modules in three rows and four columns, and each row and each column of adjacent charging modules are connected through a switching unit, so that the power of any charging module can be collected to one place through the switching unit in the selected order of right first and then down. selecting each required charging module in the charger based on a preset selection principle, comprising: selecting each required charging module based on a preset selection order and the working state of each charging module, and merging each selected charging module, comprising: performing parallel operation on each selected charging module to obtain a merged charging module; calling the merged charging module to charge the vehicle to be charged.

2. The charger power distribution method according to claim 1, wherein: the required power and the required current of the vehicle to be charged are determined based on the vehicle nameplate of the vehicle to be charged.

3. The charger power distribution method according to claim 1, wherein: the current value that each charging module in the charger can provide is within a preset range.

4. A charger power distribution apparatus, characterized by, The method comprises the following steps: a first determining module for determining the required power and the required current of the vehicle to be charged; a second determining module for determining the rated power and the maximum current of each charging module in the charger; The computing module is configured to calculate the number of required charging modules based on the demand power and the rated power, or the demand current and the maximum current, including: calculating a first number of the required charging modules according to a first ratio of the demand power to the rated power; calculating a second number of the required charging modules according to a second ratio of the demand current to the maximum current; if the first number is greater than the second number, taking the first number as the number of the required charging modules; if the second number is greater than the first number, taking the second number as the number of the required charging modules; if the first number is equal to the second number, taking the first number or the second number as the number of the required charging modules, wherein a plurality of charging modules in the charger are connected in a grid topology structure, the grid topology structure is 12 charging modules in three rows and four columns, and each row and each column of adjacent charging modules are connected through a switching unit, so that the power of any charging module can be collected to one place through the switching unit in a selection order of right first and then down. The selection module is configured to select the required charging modules in the charger based on a preset selection principle, including: selecting the required charging modules based on a preset selection order and the working state of each charging module, and merging the selected charging modules, including: performing parallel operation on the selected charging modules to obtain a merged charging module; The calling module is configured to call the merged charging module to charge the vehicle to be charged.

5. A charger characterized by comprising: A computer readable program or instructions for storing, which are executed by a processor to realize the steps in the power distribution method of any one of claims 1 to 3.

6. A computer readable storage medium characterized by A computer readable program or instructions for storing, which are executed by a processor to realize the steps in the power distribution method of any one of claims 1 to 3.

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