A multi-threaded energy distribution system and method

Abstract

The present invention belongs to the field of electronic equipment, and discloses a multi-threaded energy distribution system and method, including an AC / DC power module, a DC bus and several groups of battery loads, wherein the DC bus includes a DC positive bus and a DC negative bus; one end of the DC positive bus is connected to the AC / DC power module, and the other end is connected to the positive electrodes of several groups of battery loads; one end of the DC negative bus is connected to the AC / DC power module, and the other end is connected to the negative electrodes of several groups of battery loads; a switch component is arranged between the battery load and the DC positive bus or the DC negative bus, and the switch component is connected to the AC / DC power module. The total power of the system is configured according to the maximum battery load power, and there is no need to consider the sum of all load powers. Only one AC / DC power module is needed, which can reduce the size of the equipment or increase the load capacity, thereby reducing the installation space, saving costs, improving resource utilization, simple wiring, clear structure, increasing the flexibility of system charging and discharging, and balancing the power distribution of the AC / DC power module.

Description

Technical Field

[0001] The invention belongs to the field of electronic equipment and relates to a multi-thread-based energy distribution system and method. Background Art

[0002] With the development of power technology, many electronic devices have been powered by batteries or battery packs, which free them from the constraints of wired power supplies and expand the scope of use of electronic devices. At present, due to the limitation of battery capacity, it is necessary to charge and discharge the battery frequently.

[0003] See also Figure 1 , the high-power charging and discharging equipment under the existing battery charging and discharging structure needs to be equipped with multiple sets of AC / DC power modules to complete the charging and discharging of the battery respectively, which leads to large size, high cost, long charging and discharging time and low efficiency of the high-power charging and discharging equipment. Moreover, under the existing battery charging and discharging structure, see Figure 2 At the same time, multiple groups of low-power batteries need to be charged and discharged at the same time, resulting in the following deficiencies: 1. The power configuration needs to be configured according to the maximum power of the load, resulting in too much total system power; 2. The power modules are configured according to the channel, resulting in too much space being occupied and increasing the difficulty of installation; 3. Too many modules, too large total power and too much installation space result in high costs; 4. In actual use, not all channels are running at the same time, resulting in the total system power not being effectively utilized, low efficiency, and long charging and discharging completion time; 5. In single-phase power supply, since not all battery loads are running at the same time, not all battery loads have the same power, resulting in unbalanced power distribution. In summary, the existing battery charging and discharging structure can no longer meet current needs. Summary of the invention

[0004] The purpose of the present invention is to overcome the shortcomings of the above-mentioned prior art that the high-power charging and discharging equipment itself is too large and the energy utilization efficiency is low during the charging and discharging process, and to provide a multi-threaded energy distribution system and method.

[0005] In order to achieve the above object, the present invention adopts the following technical solutions:

[0006] A multi-threaded energy distribution system includes an AC / DC power module, a DC bus and a plurality of battery load groups, wherein the DC bus includes a DC positive bus and a DC negative bus;

[0007] One end of the DC positive bus is connected to the AC / DC power module, and the other end is connected to the positive electrodes of several groups of battery loads; one end of the DC negative bus is connected to the AC / DC power module, and the other end is connected to the negative electrodes of several groups of battery loads; a switch component is set between the battery load and the DC positive bus or the DC negative bus, and the switch component is connected to the AC / DC power module.

[0008] The present invention further improves the multi-threaded energy distribution system in that:

[0009] It also includes a system cabinet, in which an AC / DC power module, a DC bus and a plurality of battery load groups are arranged.

[0010] It also includes a host computer, which is connected to the AC / DC power module. The host computer is used to set the address of each group of battery loads, the charging and discharging priority of each group of battery loads, and the charging and discharging time of each group of battery loads and send them to the AC / DC power module.

[0011] The AC / DC power module has the same power as the battery load having the highest power among all the battery loads.

[0012] The switch component is a high-voltage relay, which is integrated inside the battery load.

[0013] It also includes a power distributor, one end of which is connected to the AC / DC power module, and the other end of which is connected to the battery management systems of all battery loads.

[0014] The power distributor is integrated inside the AC / DC power module.

[0015] In another aspect of the present invention, a multi-threaded energy allocation method comprises the following steps:

[0016] Step 1: Assign addresses to each battery load group and set the total charge and discharge time;

[0017] Step 2: Set the charge and discharge time of each battery load group and the charge and discharge sequence of all battery loads;

[0018] Step 3: Connect the switch component of the current battery load for a time equal to the charge and discharge time corresponding to the current battery load address, and disconnect the switch components of the other battery loads;

[0019] Step 4: Perform step 3 on each battery load group in the charging and discharging order of step 2;

[0020] Step 5: Repeat steps 3 and 4 until the total charge and discharge time is reached.

[0021] The present invention further improves the multi-threaded energy allocation method in that:

[0022] The specific method in step 2 is:

[0023] The priority of battery load charging and discharging is set according to the battery load charging and discharging requirements, and the charging and discharging time of each group of battery loads and the charging and discharging sequence of all battery loads are set according to the battery load charging and discharging priority.

[0024] The step 4 also includes:

[0025] When the current battery load is charged and discharged, the switch component of the current battery load is continuously disconnected, and the next group of battery loads is selected to proceed to step 3; otherwise, proceed to step 3.

[0026] Compared with the prior art, the present invention has the following beneficial effects:

[0027] The energy distribution system of the present invention connects several groups of battery loads in parallel to one end of an AC / DC power module through a DC bus, and sets a switch assembly between the battery load and a DC positive bus or a DC negative bus, and the switch assembly is connected to the AC / DC power module, and the connection and disconnection of the switch assembly are controlled by the AC / DC power module. Only one AC / DC power module is needed in the entire energy distribution system to reduce the installation space; the volume of the entire energy distribution system can be reduced, or the capacity of the battery load can be increased under the same volume. Compared with the existing charging and discharging scheme, the number of modules required is small, and the overall volume is small, so that the required installation space is small, thereby saving costs and improving resource utilization; only the DC positive bus and the DC negative bus are used to connect several groups of battery loads in parallel to the AC / DC power module, and the wiring is simple and the structure is clear; through the connection and disconnection of the switch assembly, the switching in and out of the battery load charging and discharging can be realized, thereby increasing the flexibility of the energy distribution system charging and discharging, and only one battery load can be charged and discharged at the same time, and the battery load power can be balanced.

[0028] Furthermore, the power of the AC / DC power module is the same as the battery load with the largest power among all battery loads. The total power of the energy distribution system is configured according to the power of the maximum battery load. There is no need to consider the sum of the powers of all battery loads. At the same time point, only one group of battery loads is charged and discharged. At this time, the AC / DC power module works at full power and can be effectively utilized.

[0029] Furthermore, a power distributor is provided to control the AC / DC power module to configure appropriate power for each group of battery loads, which can adapt to battery loads of various power sizes and flexibly configure the battery load power.

[0030] The energy distribution method of the present invention achieves precise control of switching on and off of each group of battery loads by assigning an address to each group of battery loads, and achieves charging and discharging of only one battery load at the same time by connecting the switch component of the current battery load for a connection time corresponding to a charge and discharge time corresponding to the current battery load address and disconnecting the switch components of the other battery loads, thereby balancing the charge and discharge power of the battery loads; at the same time, the charge and discharge time of each group of battery loads is set according to the battery load address, and charging and discharging are performed in time periods, which can prevent the battery load temperature from being too high due to continuous charging and discharging of the same battery load, and the charging and discharging has to be stopped to wait for the temperature to drop, thereby causing the extension of the charge and discharge time, thereby improving the charging efficiency and effectively shortening the total charge and discharge time.

[0031] Furthermore, by setting the priority of charging and discharging of the battery load according to the battery load address, and performing charging and discharging in descending order according to the priority of charging and discharging of the battery load, fast charging and discharging can be completed for a specific battery load. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 It is a topological diagram of energy distribution circuit in the prior art;

[0033] Figure 2 It is a timing diagram of energy distribution in the prior art;

[0034] Figure 3 A topological diagram of an energy distribution circuit in an example of the present invention;

[0035] Figure 4 This is a timing diagram of energy distribution in an example of the present invention. DETAILED DESCRIPTION

[0036] In order to enable those skilled in the art to better understand the scheme of the present invention, the technical scheme in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present invention.

[0037] It should be noted that the terms "including" and "having" and any variations thereof in the specification and claims of the present invention and the above-mentioned drawings are intended to cover non-exclusive inclusions. For example, a process, method, system, product or apparatus comprising a series of steps or units is not necessarily limited to those steps or units clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or apparatus.

[0038] The present invention is further described in detail below in conjunction with the accompanying drawings:

[0039] See also Figure 3 The present invention is based on a multi-threaded energy distribution system, including a system cabinet, an AC / DC power module, a DC bus, a power distributor, a host computer and several groups of battery loads, and the DC bus includes a DC positive bus and a DC negative bus.

[0040] One end of the DC positive bus is connected to the AC / DC power module, and the other end is connected to the positive poles of several groups of battery loads; one end of the DC negative bus is connected to the AC / DC power module, and the other end is connected to the negative poles of several groups of battery loads; a switch component is set between the battery load and the DC positive bus or the DC negative bus, and the switch component is connected to the AC / DC power module; the switch component selects a high-voltage relay, one end of the high-voltage relay is connected to the battery, and the other end is connected to the DC positive bus or the DC negative bus, which is used to disconnect or connect the DC positive bus or the DC negative bus with the battery load, and the high-voltage relay can be directly integrated inside the battery load. The AC / DC power module, the DC bus, and several groups of battery loads are all set inside the system cabinet, and the AC / DC power module, the DC bus, and several groups of battery loads are stored and protected by the system cabinet.

[0041] The connection and disconnection of the high-voltage relay is controlled by the AC / DC power module, and the connection and disconnection of the battery load is realized by the connection and disconnection of the high-voltage relay. The upper computer assigns addresses to different battery loads, and the battery load and the connected high-voltage relay share an address. The charge and discharge priority is set by the address, and the charge and discharge priority can be set manually or automatically. By setting the disconnection and connection time of the high-voltage relay, the battery load can achieve a single charge and discharge time or a total charge and discharge time. After completing the system wiring, the charge and discharge time can be set manually or automatically through the upper computer. After the system is working, charging and discharging are carried out in a high-frequency cycle in several battery loads, and multiple threads run simultaneously to meet the charging and discharging requirements.

[0042] The power distributor is connected to the battery management system BMS of the battery load to determine the charge and discharge power of the battery load. The power distributor controls the AC / DC power module to distribute the appropriate power to the battery load. It can adapt to battery loads of various power sizes and can be flexibly configured. The power distributor can be directly integrated into the AC / DC power module.

[0043] Among them, the power size of the AC / DC power module is the same as the power of the battery load with the largest power. That is, the AC / DC power module is configured according to the energy demand; the AC / DC power module is configured according to the highest power of several load batteries. At the same time point, only one group of batteries is charged and discharged. At this time, the AC / DC power module works at full power and can be effectively utilized. According to the DC bus structure, only one group of AC / DC power modules is needed to complete the wiring. There is no need to match additional power modules. Several groups of battery loads do not need to be installed in different channels. They can be installed completely in parallel, which reduces the installation space, reduces the volume of the energy distribution system, or increases the battery load capacity.

[0044] If a battery load is fully charged or discharged during the charging and discharging process, the fully charged or discharged battery load can be automatically cut out and the segmentation time can be automatically adjusted. The power distributor takes into account the battery information provided by the battery management system BMS and the charging and discharging priority set by the host computer, calculates the length of time required for each group of battery loads to be charged and discharged once, and then issues control instructions according to the calculated duration to complete the charging and discharging of the remaining battery loads and improve charging efficiency. If a specific battery load needs to be charged and discharged quickly, the segmentation duration of the corresponding battery load can be adjusted to complete the priority setting to meet the needs.

[0045] The present invention also discloses a multi-threaded energy allocation method, comprising the following steps:

[0046] Step 1: Assign addresses to each battery load group and set the total charge and discharge time.

[0047] Step 2: Set the charge and discharge time of each group of battery loads according to the battery load address; if a specific load needs to be charged and discharged quickly, the segmented time of the corresponding load can be adjusted to complete the priority setting to meet the needs.

[0048] Step 3: Connect the switch component of the current battery load for a time equal to the charge and discharge time corresponding to the current battery load address, and disconnect the switch components of the other battery loads.

[0049] Step 4: Perform step 3 for each group of battery loads in turn; if a load has reached a full or empty state during the charge and discharge process, the full or empty load can be automatically cut out, and the segmentation time can be automatically adjusted to complete the charge and discharge of the remaining loads, thereby improving the charging efficiency. That is, when the current battery load is charged and discharged, the switch component of the current battery load is continuously disconnected.

[0050] Step 5: Repeat steps 3 and 4 until the total charge and discharge time is reached.

[0051] Example

[0052] In this embodiment, four groups of battery loads are selected. The selection of battery loads is generally based on demand analysis to obtain system demand definition and complete the selection. At this time, the designer does not need to face the design difficulty and complexity of the demand, calculate the total power required by the battery load, and select a suitable AC / DC power module. The power size of the AC / DC power module is the same as the power of the maximum battery load. There is no need to calculate the power for each group of battery loads separately, and there is no need to consider how to balance each group of battery loads. It is no longer limited to the hardware installation size.

[0053] according to Figure 3 The wiring shown in the figure provides an AC / DC power module that can meet the power requirements; 4 groups of battery loads are connected in parallel to the output bus of the AC / DC power module to complete the wiring. The battery management system BMS of each group of battery loads is connected to the AC / DC power module to complete the communication with the battery load. The AC / DC power module communicates with the battery management system BMS through a protocol. The battery management system BMS provides information about the battery pack and battery cells to the AC / DC power module, including SOC, voltage, required voltage and current during charging, the maximum allowable voltage, current and rated capacity of the battery, etc. The AC / DC power module issues control instructions to control the on and off of the high-voltage relay of the battery load.

[0054] By controlling the disconnection and connection of the high-voltage relay, the battery load is dynamically switched into the system. Figure 4 , from 0 to t0, the system setting is completed and started; from t0 to t1, the high-voltage relay connected to the battery load BAT1 is connected, and the other high-voltage relays are disconnected, so as to realize the charging and discharging operation of the battery load BAT1; from t1 to t2, the high-voltage relay connected to the battery load BAT2 is connected, and the other high-voltage relays are disconnected, so as to realize the charging and discharging operation of the battery load BAT2; from t2 to t3, the high-voltage relay connected to the battery load BAT3 is connected, and the other high-voltage relays are disconnected, so as to realize the charging and discharging operation of the battery load BAT3; from t3 to t4, the high-voltage relay connected to the battery load BAT4 is connected, and the other high-voltage relays are disconnected, so as to realize the charging and discharging operation of the battery load BAT4; that is, a charging and discharging cycle is completed from t0 to t4, so as to realize the charging and discharging of all battery loads once, and the charging and discharging cycle from t0 to t4 is repeated to complete the charging and discharging function designed by the whole system, and it is obviously obtained that if the number of connected battery loads is inconsistent with the number shown in the example, the time-sharing period can be adjusted to complete the operation of all battery loads.

[0055] The energy distribution system and method based on multi-threading of the present invention has the following advantages compared with the existing battery charging and discharging structure: 1. The total power of the system is configured according to the maximum battery load power, without considering the sum of all battery load powers. 2. Only one AC / DC power module is needed in the system to reduce the installation space; the system volume can be reduced or the battery load capacity can be increased; 3. The wiring is simple and the structure is clear; 4. Compared with the existing charging and discharging structure, the system volume is small, the power can be reasonably applied and the installation space requirement is small, thereby saving costs and improving resource utilization; 5. It can adapt to battery loads of various power sizes and be flexibly configured; 6. Increase the flexibility of charging and discharging, and balance the battery load charging and discharging power.

[0056] The above contents are only for explaining the technical idea of ​​the present invention and cannot be used to limit the protection scope of the present invention. Any changes made on the basis of the technical solution in accordance with the technical idea proposed by the present invention shall fall within the protection scope of the claims of the present invention.

Claims

1. A multi-threaded energy allocation method, characterized in that: It is realized by a multi-threaded energy distribution system, which includes an AC / DC power module, a DC bus and several groups of battery loads, the DC bus includes a DC positive bus and a DC negative bus; one end of the DC positive bus is connected to the AC / DC power module, and the other end is connected to the positive electrodes of several groups of battery loads; one end of the DC negative bus is connected to the AC / DC power module, and the other end is connected to the negative electrodes of several groups of battery loads; a switch component is set between the battery load and the DC positive bus or the DC negative bus, and the switch component is connected to the AC / DC power module; The multi-threaded energy allocation method comprises the following steps: Step 1: Assign addresses to each battery load group and set the total charge and discharge time; Step 2: Set the charge and discharge time of each battery load group and the charge and discharge sequence of all battery loads; Step 3: Connect the switch component of the current battery load for a time equal to the charge and discharge time corresponding to the current battery load address, and disconnect the switch components of the other battery loads; Step 4: Perform step 3 on each battery load group in the charging and discharging order of step 2; Step 5: Repeat steps 3 and 4 until the total charge and discharge time is reached; The specific method in step 2 is: Set the priority of battery load charging and discharging according to the battery load charging and discharging requirements, and set the charging and discharging time of each group of battery loads and the charging and discharging order of all battery loads according to the battery load charging and discharging priority; The AC / DC power module has the same power as the battery load having the highest power among all the battery loads.

2. The multi-threaded energy allocation method according to claim 1, characterized in that: The step 4 also includes: When the current battery load is charged and discharged, the switch component of the current battery load is continuously disconnected, and the next group of battery loads is selected to proceed to step 3; otherwise, proceed to step 3.

3. The multi-threaded energy allocation method according to claim 1, characterized in that: The multi-thread-based energy distribution system also includes a system cabinet, and an AC / DC power module, a DC bus, and a plurality of battery load groups are all arranged inside the system cabinet.

4. The multi-threaded energy allocation method according to claim 1, characterized in that: The multi-threaded energy distribution system also includes a host computer, which is connected to the AC / DC power module. The host computer is used to set the address of each group of battery loads, the charging and discharging priority of each group of battery loads, and the charging and discharging time of each group of battery loads and send them to the AC / DC power module.

5. The multi-threaded energy allocation method according to claim 1, characterized in that: The switch component is a high-voltage relay, which is integrated inside the battery load.

6. The multi-threaded energy allocation method according to claim 1, characterized in that: The multi-threaded energy distribution system also includes a power distributor, one end of which is connected to the AC / DC power module, and the other end of which is connected to the battery management systems of all battery loads.

7. The multi-threaded energy allocation method according to claim 6, characterized in that: The power distributor is integrated inside the AC / DC power module.

Images