Power conversion device

Abstract

The invention relates to a power conversion device which comprises a three-phase input module used for providing three-phase power input, three single-phase input modules used for providing single-phase alternating current input, a three-phase output module used for providing three-phase power output and a single-phase output module used for providing single-phase output. The controller is connected with the three-phase input module, the single-phase input module, the three-phase output module and the single-phase output module, and the switching module is connected with the controller, the three-phase input module, the single-phase input module, the three-phase output module and the single-phase output module. Wherein the controller is used for receiving a control instruction so as to set the working mode of the device according to the control instruction, and the device supplies power to one or more of the single-phase output module and / or the three-phase output module through one or more of the single-phase input module and the three-phase input module under different working modes. The method can be applied to more application scenes on the premise of ensuring the cost and volume requirements.

Description

Technical Field

[0001] This invention relates to the field of power control technology, and more specifically, to a power conversion device. Background Technology

[0002] Energy storage systems are widely used in home backup power, emergency power, and outdoor power supplies, converting electrical energy from batteries into AC power required by the loads in these applications. Common energy storage systems include single-phase and three-phase systems. A key performance indicator is the number of appliances a storage system can power. Single-phase energy storage systems are typically small, portable, and inexpensive, but cannot power three-phase appliances. Three-phase energy storage systems can power both single-phase and three-phase devices, but are usually larger, more expensive, and less portable. While single-phase energy storage systems can handle most scenarios when outputting single-phase AC power, they struggle to support three-phase devices. Summary of the Invention

[0003] The technical problem to be solved by the present invention is to provide a power conversion device that addresses the aforementioned technical deficiencies of the prior art.

[0004] The technical solution adopted by this invention to solve its technical problem is as follows: A power conversion device is constructed, comprising: a three-phase input module for providing three-phase electrical input; three single-phase input modules for providing single-phase AC input respectively; a three-phase output module for providing three-phase electrical output; and a single-phase output module for providing single-phase output; a controller connecting the three-phase input module, the single-phase input module, the three-phase output module, and the single-phase output module; and a switching module connecting the controller, the three-phase input module, the single-phase input module, the three-phase output module, and the single-phase output module; wherein... The controller is used to receive control commands to set the operating mode of the device according to the control commands. In different operating modes, the device supplies power to the single-phase output module and / or one or more of the three-phase output modules through the single-phase input module and one or more of the three-phase input modules.

[0005] Preferably, in the power conversion device described herein, when the device is in a first operating mode, the controller controls one or more of the single-phase output modules and the single-phase input modules to be turned on.

[0006] Preferably, in the power conversion device described herein, when the controller receives the first control command, it confirms whether the single-phase output module is connected to the target load and whether at least one of the single-phase input modules has a power supply input. If both are true, the controller controls the device to the first operating mode.

[0007] Preferably, in the power conversion device described herein, when the device is in the second operating mode, the controller controls the positive terminal of the single-phase output module to be connected to the positive terminal of one or more single-phase input modules and one phase of the three-phase input module, and the negative terminal of the single-phase output module to be connected to the negative terminal of one or more single-phase input modules and the neutral wire of the three-phase input module.

[0008] Preferably, in the power conversion device described herein, when the controller receives the second control command, it confirms whether the single-phase output module is connected to the target load and whether the single-phase input module has a power supply input and the three-phase input module has a power supply input. If so, it controls the device to the second operating mode.

[0009] Preferably, in the power conversion device described herein, when the device is in the third operating mode, the controller controls the three phases of the three-phase output module to be connected to the positive terminals of the multiple single-phase input modules one by one, and the neutral line of the three-phase output module is connected to the negative terminals of the multiple single-phase input modules.

[0010] Preferably, in the power conversion device described herein, when the controller receives the third control command, it confirms whether the three-phase output module is connected to the target load and whether the three single-phase input modules have power input. If so, it controls the device to the third operating mode.

[0011] Preferably, in the power conversion device described herein, when the device is in the fourth operating mode, the controller controls one phase of the three-phase output module to be connected to one phase of the three-phase input module, the other two phases of the three-phase output module to be connected to the positive terminals of the two single-phase input modules, and the neutral wire of the three-phase output module to be connected to the neutral wire of the three-phase input module and the negative terminals of the two single-phase input modules.

[0012] Preferably, in the power conversion device described herein, when the controller receives the fourth control command, it confirms whether the three-phase output module is connected to the target load and whether the three-phase input module has a power supply input while two of the single-phase input modules have a power supply input. If so, the controller controls the device to the fourth operating mode.

[0013] Preferably, in the power conversion device described herein, when the device is in the fifth operating mode, the controller controls two phases of the three-phase output module to be connected to two phases of the three-phase input module in a one-to-one correspondence, the remaining phases of the three-phase output module are connected to the positive terminal of a single-phase input module, and the neutral wire of the three-phase output module is connected to both the neutral wire of the three-phase input module and the negative terminal of the single-phase input module.

[0014] Preferably, in the power conversion device described herein, when the controller receives the fifth control command, it confirms whether the three-phase output module is connected to the target load and whether the three-phase input module has a power supply input while one of the single-phase input modules has a power supply input. If so, the controller controls the device to the fifth operating mode.

[0015] The power conversion device of the present invention has the following advantages: it can be applied to more application scenarios while ensuring cost and size requirements. Attached Figure Description

[0016] The present invention will be further described below with reference to the accompanying drawings and embodiments. In the accompanying drawings: Figure 1 This is a schematic diagram of the structure of an embodiment of a power conversion device according to the present invention; Figure 2 This is a schematic diagram of the wiring in the first operating mode of a power conversion device according to the present invention; Figure 3 This is a schematic diagram of the wiring in the second operating mode of a power conversion device according to the present invention; Figure 4 This is a schematic diagram of the wiring in the third operating mode of a power conversion device according to the present invention; Figure 5 This is a schematic diagram of the wiring for the fourth operating mode of a power conversion device according to the present invention; Figure 6 This is a schematic diagram of the wiring for the fifth operating mode of a power conversion device according to the present invention. Detailed Implementation

[0017] To provide a clearer understanding of the technical features, objectives, and effects of the present invention, specific embodiments of the present invention will now be described in detail with reference to the accompanying drawings.

[0018] like Figure 1 The diagram illustrates an embodiment of a power conversion device according to the present invention. Figure 1In one embodiment of the power conversion device of the present invention shown, the device includes: a three-phase input module 110 for providing three-phase power input; three single-phase input modules 120 for providing single-phase AC input respectively; a three-phase output module 150 for providing three-phase power output; and a single-phase output module 160 for providing single-phase output; a controller 130 connecting the three-phase input module 110, the single-phase input module 120, the three-phase output module 150, and the single-phase output module 160; and a switching module 140 connecting the controller 130, the three-phase input module 110, the single-phase input module 120, the three-phase output module 150, and the single-phase output module 160; wherein the controller 130 is used to receive control commands to set the operating mode of the device according to the control commands, wherein the device supplies power to one or more of the single-phase output modules 160 and / or the three-phase output modules 150 through one or more of the single-phase input modules 120 and the three-phase input modules 110 in different operating modes.

[0019] Specifically, the three-phase input module 110 is used to connect to an external three-phase power input to provide three-phase input to the device. The single-phase input module 120 is used to connect to an external single-phase input, such as the AC output provided by an energy storage module. The three-phase output module 150 is used to provide three-phase power to external devices, and the single-phase output module 160 is used to provide single-phase power to external devices. During operation, the device's operating mode is controlled by the controller 130. The controller 130 switches the operating states of the internal single-phase input module 120, three-phase input module 110, and switching module 140 according to received control commands, enabling one or more of the single-phase input module 120 and three-phase input module 110 to supply power to one or more of the single-phase output module 160 and / or three-phase output module 150. During the control process of the controller 130, the operating states of each module (three-phase input module 110, single-phase input module 120, three-phase output module 150, and single-phase output module 160) can also be used to determine their configurable operating modes. In a specific application, the single-phase input module 120 can be used to connect to the output of the energy storage module in the energy storage system, and the three-phase input module 110 is used to connect to the three-phase mains power input in the energy storage system. The operating mode set by the controller 130 enables grid connection operations under different application scenarios in the energy storage system.

[0020] like Figure 2As shown, in one embodiment, when the device is in the first operating mode, the controller 130 controls one or more of the single-phase input modules 120 to be connected to the single-phase output module 160. Specifically, when the device needs to be set to the first operating mode, the controller 130 will set the single-phase output module 160 to be connected to one or more of the three single-phase input modules 120 according to the corresponding control command. This allows power to be supplied to the single-phase output module 160 through the single-phase input modules 120, and power to external devices through the single-phase output module 160. When the device is in the first operating mode, it can select whether one or more of the single-phase input modules 120 are connected to the single-phase output module 160 according to different scenarios and judgment conditions.

[0021] In one embodiment, when the controller 130 receives the first control command, it confirms whether the single-phase output module 160 is connected to the target load and whether at least one single-phase input module 120 has a power supply input. If both are true, the control device is in the first operating mode. Specifically, when the device is working, the controller 130 does not immediately set the first operating mode when it receives the first control command. It performs status checks on each internal module. For example, it needs to determine whether the single-phase output module 160 is connected to the target load and whether a single-phase input module 120 has a power supply input. Only when the single-phase output module 160 is indeed connected to the target load and a single-phase input module 120 has a power supply input will the internal operating circuit of the device be controlled to execute the setting of the first operating mode. For example, when one single-phase input module 120 has a power input, it can be directly set to be connected to the single-phase output module 160. When two single-phase input modules 120 have a power input, any one or all of them can be set to be connected to the single-phase output module 160 as needed. When three single-phase input modules 120 have a power input, they can be arbitrarily combined and selected to be connected to the single-phase output module 160 as needed. This process can be triggered by the controller 130 according to the application scenario or user requirements.

[0022] like Figure 3As shown, in the second operating mode, the controller 130 controls the positive terminal of the single-phase output module 160 to be connected to the positive terminals of one or more single-phase input modules 120 and one phase of the three-phase input module 110, and the negative terminal of the single-phase output module 160 to be connected to the negative terminals of one or more single-phase input modules 120 and the neutral wire of the three-phase input module 110. Specifically, when the device needs to be set to the second operating mode, the controller 130 will set the positive terminal of the single-phase output module 160 to be simultaneously connected to one or more of the three single-phase input modules 120 and one of the three-phase input modules 110 according to the corresponding control command, so as to simultaneously supply power to the single-phase output module 160 through the single-phase input modules 120 and the three-phase input modules 110, so as to supply power to external devices through the single-phase output module 160. In the second operating mode, the device can select one or more of the single-phase input modules 120 to be connected to the single-phase output module 160, or select any one phase of the three-phase input modules 110 to be connected to the single-phase output module 160, depending on different scenarios and judgment conditions. For example, a fixed phase of the three-phase input modules 110 can be set to be connected to the single-phase output module 160.

[0023] In one embodiment, when the controller 130 receives the second control command, it confirms whether the single-phase output module 160 is connected to the target load and whether the single-phase input module 120 has a power input while the three-phase input module 110 has a power input. If so, the control device enters the second operating mode. Specifically, when the device is working, the controller 130 does not immediately set the second operating mode when it receives the second control command. It performs status checks on each internal module. For example, it needs to determine whether the single-phase output module 160 is connected to the target load, whether the three-phase input module 110 has a power input, and whether the single-phase input module 120 has a power input. Only when the single-phase output module 160 is indeed connected to the target load, and both the three-phase input module 110 and the single-phase input module 120 have a power input, will the internal operating circuit of the device be controlled to execute the setting of the second operating mode. For example, when one single-phase input module 120 has a power input, it can be directly set to connect one phase of the single-phase input module 120 and one phase of the three-phase input module 110 to the single-phase output module 160. When two single-phase input modules 120 have a power input, any one or all of the single-phase input modules 120 and one phase of the three-phase input module 110 to the single-phase output module 160 can be set to connect as needed. When three single-phase input modules 120 have a power input, the single-phase input modules 120 and one phase of the three-phase input module 110 to the single-phase output module 160 can be arbitrarily combined and selected as needed. This process can be triggered by the controller 130 according to the application scenario or user requirements.

[0024] like Figure 4As shown, in the third operating mode, the controller 130 controls the three phases of the three-phase output module 150 to be connected one-to-one with the positive terminals of the multiple single-phase input modules 120, and the neutral wire of the three-phase output module 150 to be connected with the negative terminals of the multiple single-phase input modules 120. Specifically, when the device needs to be set to the third operating mode, the controller 130 will set the three phases of the three-phase output module 150 to be connected one-to-one with the positive terminals of the three single-phase input modules 120 according to the corresponding control command, so as to supply power to the three-phase output module 150 through the single-phase input modules 120, and then supply power to external devices through the single-phase output module 160. In the third operating mode, the output phase of the single-phase input module 120 can be selected to correspond one-to-one with the three-phase output of the three-phase output module 150 according to different scenarios and judgment conditions.

[0025] In one embodiment, when the controller 130 receives the third control command, it confirms whether the three-phase output module 150 is connected to the target load and whether the three single-phase input modules 120 have power input. If so, the control device enters the third operating mode. Specifically, when the device is working, the controller 130 does not immediately set the third operating mode when it receives the third control command. It performs status checks on each internal module. For example, it needs to determine whether the three-phase output module 150 is connected to the target load and whether all three single-phase input modules 120 have power input. Only when the three-phase output module 150 is indeed connected to the target load and all three single-phase input modules 120 have power input will the internal working circuit of the device execute the setting of the third operating mode. The three-phase connection relationship between the three single-phase input modules 120 and the three-phase output module 150 can be set as needed. For example, the three phases of the three single-phase input modules 120 and the three-phase output module 150 can be set to a fixed pair or a random pair. This process can be triggered by the controller 130 according to the application scenario or user requirements.

[0026] like Figure 5As shown, in the fourth operating mode, the controller 130 controls one phase of the three-phase output module 150 to be connected to one phase of the three-phase input module 110, and the other two phases of the three-phase output module 150 to be connected to the positive terminals of the two single-phase input modules 120 one by one. The neutral wire of the three-phase output module 150 is connected to the neutral wire of the three-phase input module 110 and the negative terminals of the two single-phase input modules 120. Specifically, when it is necessary to set the device to the fourth operating mode, the controller 130 will set one phase of the three-phase output module 150 to be connected to one phase of the three-phase input module 110 according to the corresponding control command, and set the other two phases of the three-phase output module 150 to be connected to the two single-phase input modules 120 one by one, so that the single-phase input modules 120 and the three-phase input modules 110 can simultaneously supply power to the three-phase output module 150, and then supply power to external devices through the three-phase output module 150. When the device is in the fourth working mode, it can select which phase of the three-phase input module 110 is connected to the three-phase output module 150 according to different scenarios and judgment conditions, and select which two phases of the single-phase input module 120 are connected to the other two phases of the three-phase output module 150 in a one-to-one correspondence.

[0027] In one embodiment, when the controller 130 receives the fourth control command, it confirms whether the three-phase output module 150 is connected to the target load and whether the three-phase input module 110 has a power input while two single-phase input modules 120 have a power input. If so, the control device is in the fourth operating mode. Specifically, when the device is working, the controller 130 does not immediately set the fourth operating mode when it receives the fourth control command. It performs status checks on each internal module. For example, it needs to determine whether the three-phase output module 150 is connected to the target load, whether the three-phase input module 110 has a power input, and whether two single-phase input modules 120 have a power input. Only when the three-phase output module 150 is indeed connected to the target load, and the three-phase input module 110 has a power input while two single-phase input modules 120 have a power input, will the internal working circuit of the device be controlled to execute the fourth operating mode setting. For example, one phase of the three-phase input module 110 can be connected to one phase of the three-phase output module 150. When only two single-phase input modules 120 have power input, the remaining two phases of those two single-phase input modules 120 can be directly connected to the three-phase output module 150. When three single-phase input modules 120 have power input, any two single-phase input modules 120 can be connected to the remaining two phases of the three-phase output module 150 as needed. This process can be triggered by the controller 130 according to the application scenario or user requirements. For ease of setup, a fixed one phase of the three-phase input module 110 can be connected to one phase of the three-phase output module 150, and the remaining two phases can be matched with the two single-phase input modules 120 according to a preset rule.

[0028] like Figure 6 As shown, in the fifth operating mode, the controller 130 controls two phases of the three-phase output module 150 to be connected one-to-one with two phases of the three-phase input module 110. The remaining phase of the three-phase output module 150 is connected to the positive terminal of a single-phase input module 120. The neutral wire of the three-phase output module 150 is connected to both the neutral wire of the three-phase input module 110 and the negative terminal of the single-phase input module 120. Specifically, when the device needs to be set to the fifth operating mode, the controller 130 will set two phases of the three-phase output module 150 to be connected one-to-one with two phases of the three-phase input module 110 according to the corresponding control command, and set the remaining phase of the three-phase output module 150 to be connected to a single-phase input module 120. This allows power to be supplied to the three-phase output module 150 simultaneously through the single-phase input module 120 and the three-phase input module 110, thereby supplying power to external devices through the three-phase output module 150. When the device is in the fifth working mode, it can select which two phases of the three-phase input module 110 are connected to the three-phase output module 150 according to different scenarios and judgment conditions, and select which one of the single-phase input modules 120 is connected to the remaining phase of the three-phase output module 150.

[0029] In one embodiment, when the controller 130 receives the fifth control command, it confirms whether the three-phase output module 150 is connected to the target load and whether the three-phase input module 110 and one single-phase input module 120 have power input. If so, the control device is in the fifth operating mode. Specifically, when the device is working, the controller 130 does not immediately set the fifth operating mode when it receives the fifth control command. It performs status checks on each internal module. For example, it needs to determine whether the three-phase output module 150 is connected to the target load, whether the three-phase input module 110 has power input, and whether one single-phase input module 120 has power input. Only when the three-phase output module 150 is indeed connected to the target load, and the three-phase input module 110 has power input and one single-phase input module 120 has power input, will the internal working circuit of the device execute the fifth operating mode setting. For example, two phases of the three-phase input module 110 can be connected to two phases of the three-phase output module 150. When only one single-phase input module 120 has power input, the remaining phases of that single-phase input module 120 can be directly connected to the remaining phases of the three-phase output module 150. When two single-phase input modules 120 have power input, any single-phase input module 120 can be connected to the remaining phases of the three-phase output module 150 as needed. When three single-phase input modules 120 have power input, any single-phase input module 120 can be connected to the remaining phases of the three-phase output module 150 as needed. This process can be triggered by the controller 130 according to the application scenario or user requirements. For ease of setup, two fixed phases of the three-phase input module 110 can be connected to two corresponding phases of the three-phase output module 150, and the remaining phases can be matched with a single-phase input module 120 according to a preset rule.

[0030] Through the above embodiments, the application scenarios of single-phase energy storage systems can be effectively expanded, increasing the choices available to users in practical applications. Furthermore, the efficiency and utilization rate of the products are significantly improved, achieving cost control and size optimization while accommodating both single-phase and three-phase power supply modes. In addition, due to its enhanced flexibility, distributed application scenarios are further expanded, becoming more diverse and meeting the power needs of more complex environments, thus bringing users a more efficient, economical, and convenient user experience.

[0031] It is understood that the above embodiments only illustrate preferred embodiments of the present invention, and their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of the present invention. It should be noted that those skilled in the art can freely combine the above technical features without departing from the concept of the present invention, and can also make several modifications and improvements, all of which fall within the protection scope of the present invention. Therefore, all equivalent transformations and modifications made with respect to the scope of the claims of the present invention should fall within the scope of the claims of the present invention.

Claims

1. A power conversion device, characterized in that, include: A three-phase input module for providing three-phase electrical input; three single-phase input modules for providing single-phase AC input respectively; a three-phase output module for providing three-phase electrical output; and a single-phase output module for providing single-phase output; a controller connecting the three-phase input module, the single-phase input module, the three-phase output module, and the single-phase output module; and a switching module connecting the controller, the three-phase input module, the single-phase input module, the three-phase output module, and the single-phase output module; wherein... The controller is used to receive control commands to set the operating mode of the device according to the control commands. In different operating modes, the device supplies power to the single-phase output module and / or one or more of the three-phase output modules through the single-phase input module and one or more of the three-phase input modules.

2. The power conversion device according to claim 1, characterized in that, In the first operating mode, the controller controls one or more of the single-phase output modules and the single-phase input modules to be turned on.

3. The power conversion device according to claim 2, characterized in that, When the controller receives the first control command, it confirms whether the single-phase output module is connected to the target load and whether at least one of the single-phase input modules has a power supply input. If both are true, the controller controls the device to the first working mode.

4. The power conversion device according to claim 1, characterized in that, In the second operating mode, the controller controls the positive terminal of the single-phase output module to be connected to the positive terminal of one or more single-phase input modules and one phase of the three-phase input module, and the negative terminal of the single-phase output module to be connected to the negative terminal of one or more single-phase input modules and the neutral wire of the three-phase input module.

5. The power conversion device according to claim 4, characterized in that, When the controller receives the second control command, it confirms whether the single-phase output module is connected to the target load and whether the single-phase input module has a power supply input and the three-phase input module has a power supply input. If so, it controls the device to the second working mode.

6. The power conversion device according to claim 1, characterized in that, In the third working mode, the controller controls the three phases of the three-phase output module to be connected to the positive terminals of the multiple single-phase input modules one by one, and the neutral wire of the three-phase output module is connected to the negative terminals of the multiple single-phase input modules.

7. The power conversion device according to claim 6, When the controller receives the third control command, it confirms whether the three-phase output module is connected to the target load and whether the three single-phase input modules have power input. If so, it controls the device to the third working mode.

8. The power conversion device according to claim 1, characterized in that, In the fourth working mode, the controller controls one phase of the three-phase output module to be connected to one phase of the three-phase input module, and the other two phases of the three-phase output module are connected to the positive terminals of the two single-phase input modules one by one. The neutral wire of the three-phase output module is connected to the neutral wire of the three-phase input module and the negative terminals of the two single-phase input modules.

9. The power conversion device according to claim 8, characterized in that, When the controller receives the fourth control command, it confirms whether the three-phase output module is connected to the target load and whether the three-phase input module has a power supply input while two of the single-phase input modules have a power supply input. If so, it controls the device to the fourth working mode.

10. The power conversion device according to claim 1, characterized in that, In the fifth working mode, the controller controls two phases of the three-phase output module to be connected to two phases of the three-phase input module in a one-to-one correspondence. The remaining phases of the three-phase output module are connected to the positive terminal of a single-phase input module. The neutral wire of the three-phase output module is connected to the neutral wire of the three-phase input module and the negative terminal of the single-phase input module.

11. The power conversion device according to claim 10, characterized in that, When the controller receives the fifth control command, it confirms whether the three-phase output module is connected to the target load and whether the three-phase input module has a power supply input while one of the single-phase input modules has a power supply input. If so, it controls the device to the fifth working mode.

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