Output series constant-current voltage-sharing control device and method

Abstract

The invention provides an output series-connection constant-current voltage-sharing control device which comprises a plurality of power supply modules, each power supply module comprises a positive output end and a negative output end, and the power supply modules are sequentially connected in series through the positive output ends and the negative output ends and then connected to the two ends of a load. The voltage-sharing control of the output series constant-current voltage-sharing control device comprises the following steps: taking any one of the plurality of power supply modules as a main power supply module, and taking the rest of the power supply modules as slave power supply modules respectively; and main power supply output voltage of the main power supply module is collected and sent to the slave power supply modules, so that each slave power supply module carries out voltage regulation on the slave power supply module based on the main power supply output voltage and the output voltage of the slave power supply module, and voltage sharing of the output series voltage is realized. According to the output series-connection constant-current voltage-sharing control device and method provided by the invention, a plurality of same power supply modules are connected in parallel, an additional main power supply or host control is not needed, and the device is simpler, more stable and convenient to expand while output constant-current voltage sharing is realized.

Description

Technical Field

[0001] The present invention relates to the technical field of power supply, and in particular to an output series constant current voltage control device and method. Background Art

[0002] The output terminal of the power module is connected in series, which means connecting the output terminals of two or more power modules together. In the actual application of power supply, it is often encountered that the required voltage value is relatively special or the output power of a single power supply cannot meet the application requirements. When similar standard products cannot meet special applications, you can consider using multiple power supplies of the same model in series to deal with it.

[0003] When applying in series, it is necessary to consider the output voltage distribution of each module and the stability problem. At present, the technology of connecting power modules in series can be achieved by building external control components or by setting up a single host to control all slaves. However, external control makes the system complex and unstable, and there will be problems such as complex system lines, multiple connections, and susceptibility to interference; setting the host mode separately requires setting up a special host when networking, which makes the system complex and not flexible enough to expand. Summary of the invention

[0004] The present invention aims to provide an output series constant current voltage balancing control device and method to solve the above technical problems, realize output series constant current voltage balancing and make the circuit simpler.

[0005] In order to solve the above technical problems, the present invention provides an output series constant current voltage control device, including several power modules, wherein:

[0006] The power module comprises a positive output terminal and a negative output terminal, and a plurality of the power modules are connected in series to both ends of the load through the positive output terminal and the negative output terminal;

[0007] The output series constant current voltage-sharing control device performs voltage-sharing control including:

[0008] Any one of the power modules is used as a master power module, and the other power modules are used as slave power modules;

[0009] The main power output voltage of the main power module is collected and sent to the slave power modules, so that each slave power module can adjust the voltage of the slave power module based on the main power output voltage and its own output voltage to achieve voltage balancing of the output series voltage.

[0010] The above scheme adopts several identical power modules to form an output series power supply, and automatically identifies any one of them as the main power module to collect the output voltage of the main power supply and send it to other power modules for voltage adjustment, thereby achieving voltage balancing of the output series voltage. There is no need to set up a main power module separately or an additional host. While achieving output constant current voltage balancing, it makes the device circuit simpler, more stable and easy to expand.

[0011] Furthermore, the power supply module includes a voltage acquisition submodule and a voltage regulation submodule; wherein: the voltage acquisition submodule of the main power supply module is used to acquire the main power supply output voltage of the main power supply module and send it to the slave power supply module; the voltage acquisition submodule of the slave power supply module is used to acquire its own output voltage; the voltage regulation submodule of the slave power supply module is used to regulate the voltage of the slave power supply module based on the main power supply output voltage and its own output voltage, so as to achieve voltage equalization of the output series voltage.

[0012] In the above scheme, when the power module is identified as the main power supply, it is necessary to collect and send the main voltage output voltage to the slave power module so that it can adjust the voltage based on the main power supply output voltage, and the output series voltage equalization is achieved through simple device settings.

[0013] Furthermore, the power module also includes a control submodule; wherein: the control submodule of the main power module is used to control the voltage collection submodule to collect the main power output voltage at a preset time interval and send it to the slave power module.

[0014] The above scheme sets time control so that the power module transmits the output voltage value at a preset time interval to adjust the voltage, thereby achieving real-time control of voltage regulation and maintaining a continuous and stable voltage equalization effect.

[0015] Furthermore, the power supply module contains a preset communication address, and the master power supply module sends the master power supply output voltage to the slave power supply module based on the communication address.

[0016] The above scheme realizes communication transmission between power modules by setting corresponding communication addresses for the power modules, thereby providing a data basis for the voltage regulation process.

[0017] Furthermore, the present invention provides an output series constant current equalizing voltage control device including: pre-setting a number of constant current values ​​of the power modules, the constant current values ​​including default values ​​and adjustment values, and the default values ​​and adjustment values ​​meet preset setting conditions; the constant current value of the main power module adopts the default value, and the constant current value of the slave power module adopts the adjustment value; the constant current output by the slave power module after voltage regulation is the constant current value of the main power module, thereby realizing the constant current of the output series voltage.

[0018] The above scheme pre-sets the constant current value of the power module in two different states of the main power module or the slave power module based on the preset setting conditions, and realizes the control of the output constant current during the voltage equalization regulation process.

[0019] The device proposed in the above scheme has a simple structure and is easy to implement. It adopts several identical power modules to form an output series power supply, and automatically identifies any one of them as the main power module. The modules cooperate with each other to collect the output voltage of the main power supply and send it to other power modules for voltage adjustment, thereby achieving voltage balancing of the output series voltage. By pre-setting the constant current values ​​of the power module in two different states, output constant current control is achieved. There is no need to set up a main power module separately or an additional host. While achieving output constant current voltage balancing, the device circuit is simpler, more stable and easy to expand.

[0020] The present invention also provides an output series constant current voltage control method, which is implemented by an output series constant current voltage control device, and includes the following steps:

[0021] Any one of the power modules is used as a master power module, and the other power modules are used as slave power modules;

[0022] The main power output voltage of the main power module is collected and sent to the slave power modules, so that each slave power module can adjust the voltage of the slave power module based on the main power output voltage and its own output voltage to achieve voltage balancing of the output series voltage.

[0023] The above solution adopts several identical power modules to form an output series power supply, and automatically identifies any one of them as the main power module to collect the output voltage of the main power supply and send it to other slave power modules for voltage regulation, thereby realizing voltage equalization control of the output series power supply.

[0024] Furthermore, the main power supply output voltage is collected at preset time intervals and sent to the slave power supply modules, so that each slave power supply module collects its own output voltage and performs voltage regulation based on the main power supply output voltage and its own output voltage to achieve voltage balancing of the output series voltage.

[0025] The above scheme sets time control so that the output voltage value is transmitted at preset time intervals to adjust the voltage, thereby achieving real-time control of voltage regulation and maintaining continuous stability of the voltage equalization effect.

[0026] Furthermore, the main power output voltage of the main power module is collected and sent to the slave power module, so that each slave power module can adjust the voltage of the slave power module based on the main power output voltage and its own output voltage, thereby realizing voltage equalization of the output series voltage, including: collecting the main power output voltage of the main power module and sending it to the slave power module; so that each slave power module obtains the main power output voltage and its own output voltage, and calculates the voltage adjustment amount based on the main power output voltage and its own output voltage; thereby linearly adjusting the output voltage of the slave power module based on the voltage adjustment amount, thereby realizing voltage equalization of the output series voltage.

[0027] The above scheme calculates the voltage regulation amount by receiving the output voltage of the main power supply and its own output voltage, thereby linearly adjusting the output voltage according to the actual parameters, thereby achieving voltage balancing of the output series voltage.

[0028] Furthermore, the power supply module contains a preset communication address, and the master power supply module sends the master power supply output voltage to the slave power supply module based on the communication address.

[0029] The above scheme realizes communication transmission between power modules by setting corresponding communication addresses for the power modules, thereby providing a data basis for the voltage regulation process.

[0030] Furthermore, constant current values ​​of several of the power modules are pre-set, and the constant current values ​​include default values ​​and adjustment values, and the default values ​​and adjustment values ​​meet preset setting conditions; the constant current value of the main power module adopts the default value, and the constant current value of the slave power module adopts the adjustment value; the constant current output by the slave power module after voltage regulation is the constant current value of the main power module, thereby realizing the constant current of the output series voltage.

[0031] The above scheme pre-sets the constant current value of the power module in two different states of the main power module or the slave power module based on the preset setting conditions, and realizes the control of the output constant current in the voltage equalization regulation process. The control method proposed in the above scheme is simple and easy to implement. By automatically identifying any one of several identical power modules as the main power module, the output voltage of the main power supply is collected and sent to other power modules for voltage regulation, and the output series voltage is equalized. By pre-setting the constant current value of the power module in two different states, the output constant current control is realized, and finally the constant current equalization control of the output series power supply is realized. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 A schematic diagram of an output series constant current voltage-sharing control device provided by an embodiment of the present invention;

[0033] Figure 2 A schematic diagram of an output series constant current and voltage equalization control process provided by an embodiment of the present invention. DETAILED DESCRIPTION

[0034] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions 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 are within the scope of protection of the present invention.

[0035] Embodiment 1:

[0036] This embodiment provides an output series constant current voltage control device, including several power modules, wherein:

[0037] The power module comprises a positive output terminal and a negative output terminal, and a plurality of the power modules are connected in series to both ends of the load through the positive output terminal and the negative output terminal;

[0038] The output series constant current voltage-sharing control device performs voltage-sharing control including:

[0039] Any one of the power modules is used as a master power module, and the other power modules are used as slave power modules;

[0040] The main power output voltage of the main power module is collected and sent to the slave power modules, so that each slave power module can adjust the voltage of the slave power module based on the main power output voltage and its own output voltage to achieve voltage balancing of the output series voltage.

[0041] The above scheme adopts several identical power modules to form an output series power supply, and automatically identifies any one of them as the main power module to collect the output voltage of the main power supply and send it to other power modules for voltage adjustment, thereby achieving voltage balancing of the output series voltage. There is no need to set up a main power module separately or an additional host. While achieving output constant current voltage balancing, it makes the device circuit simpler, more stable and easy to expand.

[0042] Optionally, the power supply module includes a voltage acquisition submodule and a voltage regulation submodule; wherein: the voltage acquisition submodule of the main power supply module is used to acquire the main power supply output voltage of the main power supply module and send it to the slave power supply module; the voltage acquisition submodule of the slave power supply module is used to acquire its own output voltage; the voltage regulation submodule of the slave power supply module is used to regulate the voltage of the slave power supply module based on the main power supply output voltage and its own output voltage, so as to achieve voltage equalization of the output series voltage.

[0043] In the specific implementation process, the internal control part of each power module includes an output voltage submodule and a communication submodule in addition to a voltage acquisition submodule and a voltage regulation submodule. The communication submodules are connected through a communication bus. The communication addresses of the power modules are different. One of the power modules is automatically identified as the master power module through the communication bus, and the rest are slave power modules. When the power module is identified as the master power supply, the master voltage output voltage needs to be collected and sent to the slave power module so that it can adjust the voltage based on the master power output voltage. The output series voltage is equalized through a simple device setting.

[0044] In the specific implementation process, the communication bus can be selected as the CAN bus, and other buses such as IIC can also be used as needed.

[0045] Optionally, the power module further includes a control submodule; wherein: the control submodule of the main power module is used to control the voltage collection submodule to collect the main power output voltage at a preset time interval and send it to the slave power module.

[0046] During the specific implementation process, after the main power module is identified, the main power module broadcasts the current main module output voltage information to the slave power module at regular intervals. By setting time control, the power module transmits the output voltage value at a preset time interval to perform voltage regulation, thereby achieving real-time control of voltage regulation and maintaining the continuous stability of the voltage equalization effect.

[0047] Optionally, the power module contains a preset communication address, and the master power module sends the master power output voltage to the slave power module based on the communication address.

[0048] In the specific implementation process, by setting corresponding communication addresses for the power modules, communication transmission between the power modules is realized, providing a data basis for the voltage regulation process; at the same time, as a priority solution, the communication bus can automatically identify one of the power modules as the main power module based on the communication address, and the rest are slave power modules.

[0049] Optionally, the present invention provides an output series constant current equalizing voltage control device including: pre-setting a number of constant current values ​​of the power modules, the constant current values ​​including default values ​​and adjustment values, and the default values ​​and adjustment values ​​meet preset setting conditions; the constant current value of the main power module adopts the default value, and the constant current value of the slave power module adopts the adjustment value; the constant current output by the slave power module after voltage regulation is the constant current value of the main power module, so as to realize the constant current of the output series voltage.

[0050] During the specific implementation process, the constant current value of the power module in two different states, the main power module or the slave power module, is pre-set based on the preset setting conditions, and the output constant current control is realized in the voltage equalization regulation process; the preset setting conditions can select an adjustment value much larger than the default value. When the constant current value is identified as the main power module through the communication bus, the default value is used, and when it is identified as a slave power module, the constant current value is adjusted to the adjustment value. When working in series, the output current of each power module is consistent. Since the constant current setting value of the main module is smaller than that of the slave module, the output constant current is determined by the main module.

[0051] The device proposed in this embodiment has a simple structure and is easy to implement. It adopts several identical power modules to form an output series power supply, and automatically identifies any one of them as the main power module. The modules cooperate with each other to collect the output voltage of the main power supply and send it to other power modules for voltage regulation, thereby achieving voltage balancing of the output series voltage. By pre-setting the constant current values ​​of the power module in two different states, output constant current control is achieved. There is no need to set up a main power module separately or an additional host. While achieving output constant current voltage balancing, the device circuit is simpler, more stable and easier to expand.

[0052] Embodiment 2:

[0053] This embodiment provides an output series constant current voltage control method, which is implemented by an output series constant current voltage control device, and includes the following steps:

[0054] Any one of the power modules is used as a master power module, and the other power modules are used as slave power modules;

[0055] The main power output voltage of the main power module is collected and sent to the slave power modules, so that each slave power module can adjust the voltage of the slave power module based on the main power output voltage and its own output voltage to achieve voltage balancing of the output series voltage.

[0056] In the specific implementation process, several identical power modules are used to form an output series power supply, and any one of them is automatically identified as the main power module to collect the output voltage of the main power supply and send it to other slave power modules for voltage regulation, thereby realizing voltage equalization control of the output series power supply.

[0057] Optionally, the main power supply output voltage is collected at preset time intervals and sent to the slave power supply modules, so that each slave power supply module collects its own output voltage and performs voltage regulation based on the main power supply output voltage and its own output voltage to achieve voltage balancing of the output series voltage.

[0058] In the specific implementation process, by setting time control, the output voltage value is transmitted according to the preset time interval to perform voltage regulation, thereby achieving real-time control of voltage regulation and maintaining the continuous stability of the voltage equalization effect.

[0059] Optionally, the main power output voltage of the main power module is collected and sent to the slave power module, so that each slave power module adjusts the voltage of the slave power module based on the main power output voltage and its own output voltage, thereby achieving voltage equalization of the output series voltage, including: collecting the main power output voltage of the main power module and sending it to the slave power module; so that each slave power module obtains the main power output voltage and its own output voltage, and calculates the voltage adjustment amount based on the main power output voltage and its own output voltage; thereby linearly adjusting the output voltage of the slave power module based on the voltage adjustment amount, thereby achieving voltage equalization of the output series voltage.

[0060] During the specific implementation process, the voltage information received from the slave power module and sent by the main power module is used as the benchmark for the output regulation amount, and is compared and calculated with the output voltage of the slave power module itself to generate the amount of output voltage adjustment required. The voltage regulation submodule performs linear adjustment of the output voltage through the power regulation amount. After adjustment, the output voltage of the slave power module is infinitely close to the output voltage of the main power module, thereby achieving voltage equalization of the output series voltage.

[0061] Optionally, the power module contains a preset communication address, and the master power module sends the master power output voltage to the slave power module based on the communication address.

[0062] In the specific implementation process, by setting corresponding communication addresses for the power modules, communication transmission between the power modules is realized, providing a data basis for the voltage regulation process; at the same time, as a priority solution, the communication bus can automatically identify one of the power modules as the main power module based on the communication address, and the rest are slave power modules.

[0063] Optionally, several constant current values ​​of the power modules are pre-set, and the constant current values ​​include default values ​​and adjustment values, and the default values ​​and adjustment values ​​meet preset setting conditions; the constant current value of the main power module adopts the default value, and the constant current value of the slave power module adopts the adjusted value; the constant current output by the slave power module after voltage regulation is the constant current value of the main power module, so as to realize the constant current of the output series voltage.

[0064] During the specific implementation process, the constant current value of the power module in two different states, the main power module or the slave power module, is pre-set based on the preset setting conditions, and the output constant current control is realized in the voltage equalization regulation process; the preset setting conditions can select an adjustment value much larger than the default value. When the constant current value is identified as the main power module through the communication bus, the default value is used, and when it is identified as a slave power module, the constant current value is adjusted to the adjustment value. When working in series, the output current of each power module is consistent. Since the constant current setting value of the main module is smaller than that of the slave module, the output constant current is determined by the main module.

[0065] The control method proposed in this embodiment is simple and easy to implement. It automatically identifies any one of several identical power modules as the main power module, thereby collecting the output voltage of the main power module and sending it to other power modules for voltage regulation, thereby achieving voltage equalization of the output series voltage. It also pre-sets the constant current values ​​of the power module in two different states to achieve output constant current control, thereby ultimately achieving constant current voltage equalization control of the output series power supply.

[0066] Embodiment three:

[0067] This embodiment provides an output series constant current voltage control device using a CAN bus. Figure 1 As shown, it includes: a plurality of power modules and a CAN bus, the plurality of power modules include power module 1, power module 2, and finally power module N; wherein: the power module contains a positive output terminal (VO+), a negative output terminal (VO-) and a communication interface, the plurality of power modules are connected in series at both ends of the load through the positive output terminal and the negative output terminal, and the plurality of power modules are electrically connected to the CAN bus through the communication interface; the power module includes a communication unit, a voltage regulating unit and a voltage sampling unit.

[0068] In the specific implementation process, the output series constant current voltage equalizing control device using the CAN bus performs voltage equalizing control including: automatically using the CAN bus to select any one of the power modules as the main power module, and the remaining power modules as slave power modules; collecting the main power output voltage of the main power module through the voltage acquisition unit, and sending it to the slave power module through the communication unit, so that the voltage adjustment unit of each slave power module adjusts the voltage of the slave power module based on the main power output voltage and its own output voltage, thereby realizing the voltage equalization of the output series voltage.

[0069] In the specific implementation process, the main power module broadcasts the current main power output voltage information to the slave power module at regular intervals. The slave power module receives the voltage information sent by the main power module as the benchmark of the output adjustment amount and compares and calculates the current output voltage of the slave power module to generate the amount of output voltage adjustment. The voltage adjustment unit adjusts the output voltage linearly through the adjustment amount. After adjustment, the output voltage of the slave power module is infinitely close to the output voltage of the main power module, thereby achieving voltage balancing of the output series voltage. The process of this step is as follows: Figure 2 As shown:

[0070] S1: The main power module samples the main power output voltage cycle by cycle, and each slave power module samples its own output voltage cycle by cycle;

[0071] S2: The main power module broadcasts the main power output voltage cycle by cycle through the CAN bus;

[0072] S3: Each slave power module receives the main power output voltage, and calculates a voltage regulation amount based on the main power output voltage and its own output voltage, so that the voltage regulation unit regulates the output voltage based on the voltage regulation amount to achieve voltage balancing of the output series voltage.

[0073] The above is a preferred embodiment of the present invention. It should be pointed out that a person skilled in the art can make several improvements and modifications without departing from the principle of the present invention. These improvements and modifications are also considered to be within the scope of protection of the present invention.

Claims

1. An output series constant current voltage control device, characterized in that: It includes several power modules; among which: The power module comprises a positive output terminal and a negative output terminal, and a plurality of the power modules are connected in series to both ends of the load through the positive output terminal and the negative output terminal; The output series constant current voltage-sharing control device performs voltage-sharing control including: Any one of the power modules is used as a master power module, and the other power modules are used as slave power modules; The main power output voltage of the main power module is collected and sent to the slave power modules, so that each slave power module can adjust the voltage of the slave power module based on the main power output voltage and its own output voltage to achieve voltage balancing of the output series voltage.

2. The output series constant current voltage control device according to claim 1, characterized in that: The power supply module includes a voltage acquisition submodule and a voltage regulation submodule; wherein: The voltage acquisition submodule of the main power module is used to collect the main power output voltage of the main power module and send it to the slave power module; The voltage collection submodule of the slave power module is used to collect its own output voltage; The voltage regulating submodule of the slave power module is used to regulate the voltage of the slave power module based on the main power output voltage and its own output voltage, so as to achieve voltage balancing of the output series voltage.

3. The output series constant current voltage control device according to claim 2, characterized in that: The power module further includes a control submodule; wherein: The control submodule of the main power module is used to control the voltage collection submodule to collect the output voltage of the main power supply and send it to the slave power module according to a preset time interval.

4. The output series constant current voltage control device according to claim 1, characterized in that: Also includes: The power supply module contains a preset communication address, and the master power supply module sends the master power output voltage to the slave power supply module based on the communication address.

5. The output series constant current voltage control device according to claim 1, characterized in that: include: Presetting a number of constant current values ​​of the power modules, wherein the constant current values ​​include a default value and an adjustment value, and the default value and the adjustment value meet a preset setting condition; The constant current value of the master power module adopts a default value, and the constant current value of the slave power module adopts an adjusted value; The constant current output from the power module after voltage regulation is the constant current value of the main power module, thereby realizing the constant current of the output series voltage.

6. An output series constant current voltage control method, characterized in that: The method is implemented by using an output series constant current voltage-sharing control device as claimed in any one of claims 1 to 5, comprising the following steps: Any one of the power modules is used as a master power module, and the other power modules are used as slave power modules; The main power output voltage of the main power module is collected and sent to the slave power modules, so that each slave power module can adjust the voltage of the slave power module based on the main power output voltage and its own output voltage to achieve voltage balancing of the output series voltage.

7. The output series constant current voltage control method according to claim 6, characterized in that: Also includes: The output voltage of the main power supply is collected at preset time intervals and sent to the slave power supply modules, so that each slave power supply module collects its own output voltage and adjusts the voltage based on the output voltage of the main power supply and its own output voltage to achieve voltage balancing of the output series voltage.

8. The output series constant current voltage control method according to claim 6, characterized in that: The main power supply output voltage of the main power supply module is collected and sent to the slave power supply module, so that each slave power supply module performs voltage regulation of the slave power supply module based on the main power supply output voltage and its own output voltage to achieve voltage balancing of the output series voltage, including: Collect the main power output voltage of the main power module and send it to the slave power module; So that each slave power module obtains the main power output voltage and its own output voltage, and calculates the voltage regulation amount based on the main power output voltage and its own output voltage; Therefore, the output voltage of the slave power module is linearly adjusted based on the voltage regulation amount, thereby achieving voltage balancing of the output series voltage.

9. The output series constant current voltage control method according to claim 8, characterized in that: Also includes: The power supply module contains a preset communication address, and the master power supply module sends the master power output voltage to the slave power supply module based on the communication address.

10. The output series constant current voltage control method according to claim 7, characterized in that: include: Presetting a number of constant current values ​​of the power modules, wherein the constant current values ​​include a default value and an adjustment value, and the default value and the adjustment value meet a preset setting condition; The constant current value of the master power module adopts a default value, and the constant current value of the slave power module adopts an adjusted value; The constant current output from the power module after voltage regulation is the constant current value of the main power module, thereby realizing the constant current of the output series voltage.

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