Energy storage power supply inverter circuit

Abstract

The utility model relates to an energy storage power supply inverter circuit. The energy storage power supply inverter circuit comprises an input module, a boost module and a switch module, the boost module comprises a transformer T1, the transformer T1 is electrically connected with the input module, the transformer T1 is provided with a first connection point and a second connection point, and the number of turns of a winding corresponding to the first connection point is larger than the number of turns of a winding corresponding to the second connection point; the switch module comprises a relay K1, and the relay K1 is electrically connected with at least one of the first connection point and the second connection point. According to the scheme provided by the invention, the conversion efficiency of battery energy can be improved, and the stability of voltage output is ensured.

Description

TECHNICAL FIELD

[0001] The utility model relates to circuit design technical field, in particular to a kind of energy storage power inverter circuit. BACKGROUND

[0002] In related art, energy storage power inverter is mainly used to convert the direct current output by battery pack into alternating current. With the increase of battery discharge duration, the voltage input to the inverter will decrease, and then the voltage value output after inverter processing will also change from high to low, and the voltage output becomes unstable, and the conversion efficiency of battery energy is reduced. SUMMARY

[0003] The utility model discloses a kind of energy storage power inverter circuit, which can improve the conversion efficiency of battery energy and ensure the stability of voltage output, to overcome the deficiencies in the prior art.

[0004] The utility model discloses a kind of energy storage power inverter circuit, which can improve the conversion efficiency of battery energy and ensure the stability of voltage output, to overcome the deficiencies in the prior art.

[0005] The utility model discloses a kind of energy storage power inverter circuit, which can improve the conversion efficiency of battery energy and ensure the stability of voltage output, to overcome the deficiencies in the prior art.

[0006] The input module includes a battery interface, MOS tube Q1 and MOS tube Q6, the MOS tube Q1 and the MOS tube Q6 are electrically connected with the battery interface respectively, and the transformer T1 is electrically connected with the MOS tube Q1 and the MOS tube Q6 respectively.

[0007] The voltage boosting module further includes capacitor C1 and rectifier BD1, the first end of the capacitor C1 is electrically connected with the transformer T1, and the second end of the capacitor C1 is electrically connected with the rectifier BD1.

[0008] The switch module further includes diode D1, and the first end of the diode D1 is electrically connected with the relay K1.

[0009] The switch module further includes triode Q7 and resistor R1, the first end of the triode Q7 is electrically connected with the second end of the diode D1, and the second end of the triode Q7 is electrically connected with the first end of the resistor R1.

[0010] The switch module further comprises a resistor R2 and a triode Q8, a first end of the resistor R2 is electrically connected with a second end of the resistor R1, and a second end of the resistor R2 is electrically connected with the triode Q8.

[0011] The switch module further comprises a resistor R3, a first end of the resistor R3 is electrically connected with the triode Q8, and a second end of the triode is grounded.

[0012] The boost module further comprises a capacitor EC1, a first end of the capacitor EC1 is electrically connected with the rectifier BD1, and a second end of the capacitor EC1 is grounded.

[0013] The first interface is electrically connected with the MOS tube Q1.

[0014] The second interface is electrically connected with the MOS tube Q6.

[0015] Compared with the prior art, the utility model has at least the following advantages:

[0016] By setting the relay K1, the connection points with different turns can be selected for electrical connection according to the high and low of the battery voltage, so that the output voltage is stabilized in a certain range, and the conversion efficiency of the battery can be improved when the battery voltage is low. BRIEF DESCRIPTION OF DRAWINGS

[0017] In order to more clearly illustrate the technical scheme of the embodiment of the utility model, the following will be briefly introduced to the drawing needed to be used in the embodiment.

[0018] Figure 1 It is the function module diagram of the energy storage power supply inverter circuit in an embodiment of the utility model;

[0019] Figure 2 It is the circuit diagram of the energy storage power supply inverter circuit in an embodiment of the utility model. DETAILED DESCRIPTION

[0020] The embodiments of the present application will be described in detail below with reference to the drawings. Although the embodiments of the present application are shown in the drawings, it should be understood that the present application can be implemented in various forms and should not be limited by the embodiments described herein. On the contrary, these embodiments are provided to make the present application more thorough and complete, and to fully convey the scope of the present application to those skilled in the art.

[0021] It should be understood that, although the terms "first", "second", "third", etc. can be used in this application to describe various information, these information should not be limited to these terms. These terms are only used to distinguish the same type of information from each other. For example, the first information can also be referred to as the second information, and similarly, the second information can also be referred to as the first information without departing from the scope of the application. Therefore, the features defined as "first", "second" can explicitly or implicitly include one or more features. In the description of this application, the meaning of "a plurality of" is two or more, unless otherwise explicitly specified and limited.

[0022] Unless otherwise expressly specified and limited, the terms "mounting", "connecting", "connecting", "fixing" and the like should be understood in a broad sense, for example, it can be fixed connection, or detachable connection or integral; it can be mechanical connection, or electrical connection; it can be directly connected, or indirectly connected through intermediate medium, it can be the internal communication of two elements or the interaction relationship between two elements. For those skilled in the art, the specific meaning of the above terms in this application can be understood according to the specific circumstances.

[0023] The energy storage power supply inverter is mainly used to convert the direct current output by the battery pack into alternating current. With the increase of the battery discharge time, the voltage input to the inverter will decrease, and then the voltage value output after the inverter processing will also decrease from high to low, the voltage output becomes unstable, and the conversion efficiency of battery energy is reduced.

[0024] In view of the above problems, the energy storage power supply inverter circuit provided by the embodiments of the application can improve the conversion efficiency of battery energy and ensure the stability of voltage output.

[0025] The technical scheme of the embodiments of the application is described in detail below with reference to the drawings.

[0026] Please refer to Figure 1 and Figure 2 An energy storage power supply inverter circuit, comprising: an input module 100, a boost module 200 and a switch module 300, the boost module 200 comprising a transformer T1, the transformer T1 being electrically connected with the input module, the transformer T1 being provided with a first connection point and a second connection point, the winding turns corresponding to the first connection point being greater than the winding turns corresponding to the second connection point; the switch module 300 comprising a relay K1, the relay K1 being electrically connected with at least one of the first connection point and the second connection point.

[0027] It should be noted that the input module 100 is a battery pack, and the rated output voltage thereof is 14.4V to 16.8V, the boost module is used for boosting, specifically, the first connection point is the 5th node of the transformer T1 in Figure 2 , and the second connection point is the 6th node of the transformer T1 in Figure 2The first connection point corresponds to the main winding, and the second connection point corresponds to the fine-tuning winding. The fine-tuning winding is usually a winding with a relatively small number of turns added on the basis of the main winding. When the battery voltage is low, the relay K1 connects the second connection point of the transformer T1 to increase the output voltage. When the battery voltage is high, the relay K1 connects the first connection point of the transformer T1. In this way, the voltage output can be ensured within a stable range.

[0028] It should be further noted that the energy storage power supply inverter circuit further comprises a first interface and a second interface. The first interface is electrically connected with the MOS tube Q1, and the second interface is electrically connected with the MOS tube Q6. The first interface is Figure 2 the PWM1 in the first interface, and the second interface is Figure 2 the PWM2 in the second interface. The first interface and the second interface are respectively electrically connected with the single-chip microcomputer. The application can detect the voltage of the battery pack by using the single-chip microcomputer control mode.

[0029] Please refer to Figure 2 In an embodiment, the input module 100 comprises a battery interface, a MOS tube Q1 and a MOS tube Q6. The MOS tube Q1 and the MOS tube Q6 are respectively electrically connected with the battery interface. The transformer T1 is electrically connected with the MOS tube Q1 and the MOS tube Q6.

[0030] It should be noted that the MOS tube Q1 and the MOS tube Q6 serve as switches, and the MOS tube Q1 and the MOS tube Q6 are complementary switches, that is, they are not turned on or turned off at the same time. The battery interface is BAT+ and BAT-.

[0031] Please refer to Figure 2 In an embodiment, the voltage boosting module 200 further comprises a capacitor C1 and a rectifier BD1. The first end of the capacitor C1 is electrically connected with the transformer T1, and the second end of the capacitor C1 is electrically connected with the rectifier BD1.

[0032] It should be noted that the capacitor C1 is a filter capacitor, and the rectifier BD1 is used for rectifying the circuit.

[0033] Please refer to Figure 2 In an embodiment, the switch module further comprises a diode D1. The first end of the diode D1 is electrically connected with the relay K1.

[0034] It should be noted that the diode D1 is used for protecting the relay K1.

[0035] Please refer to Figure 2In an embodiment, the switch module 300 further comprises a transistor Q7 and a resistor R1, a first end of the transistor Q7 is electrically connected with the second end of the diode D1, and a second end of the transistor Q7 is electrically connected with a first end of the resistor R1. Specifically, the switch module 300 further comprises a resistor R2 and a transistor Q8, a first end of the resistor R2 is electrically connected with a second end of the resistor R1, and a second end of the resistor R2 is electrically connected with the transistor Q8. Specifically, the switch module 300 further comprises a resistor R3, a first end of the resistor R3 is electrically connected with the transistor Q8, and a second end of the transistor is grounded. Specifically, the boost module 200 further comprises a capacitor EC1, a first end of the capacitor EC1 is electrically connected with the rectifier BD1, and a second end of the capacitor EC1 is grounded.

[0036] It should be noted that the resistor R1, the resistor R2, and the resistor R3 are voltage dividing and current limiting resistors, and the transistor Q7 and the transistor Q8 serve as switches. Moreover, the resistor R3 is electrically connected with the single-chip microcomputer, that is, the relay K1 of the present application is electrically connected with the first connection point or the second connection point through the single-chip microcomputer, so as to achieve the purpose of stable output voltage.

[0037] It should be further noted that the present application is electrically connected with the H-bridge circuit, which is a kind of topological structure and is composed of four MOS transistors, namely, the MOS transistor Q2, the MOS transistor Q3, the MOS transistor Q4, and the MOS transistor Q5. Then, the MOS transistor Q2, the MOS transistor Q3, the MOS transistor Q4, and the MOS transistor Q5 are externally connected with the single-chip microcomputer, so as to boost the voltage.

[0038] The following describes the circuit principle:

[0039] The battery pack inputs the voltage through BAT+ and BAT-, and the voltage is boosted to 380V-400V through the transformer T1, is filtered through the capacitor C1, and is rectified through the rectifier BD1, and is then output from the HVDC pin.

[0040] The scheme of the present application has been described in detail above with reference to the drawings. In the above embodiments, the description of each embodiment has its own focus, and the parts not described in detail in a certain embodiment can be referred to the relevant description of other embodiments. It should also be known by those skilled in the art that the actions and modules involved in the specification are not necessarily required by the present application. In addition, it can be understood that the steps in the method embodiments of the present application can be adjusted, combined, and reduced in sequence according to actual needs, and the modules in the device embodiments of the present application can be combined, divided, and reduced according to actual needs.

[0041] Having described various embodiments of the application, it is to be understood that the above description is meant not to limit and not to encompass all of the possible embodiments. Many modifications and variations of this application can be apparent to those of ordinary skill in the art without departing from the scope and spirit of the described embodiments. It is intended that the scope of the application be defined by the scope of the patent and by the claims as allowed by the patent office, which can include adaptations based on the description, equivalents, and / or substitutions of elements individually or collectively to the entire disclosure.

Claims

1. An energy storage power supply inverter circuit, characterized by, The utility model relates to a kind of power supply device, including: Input module; Boost module, including transformer T1, the transformer T1 is electrically connected with the input module, first connection point and second connection point are provided on the transformer T1, the corresponding winding turns of the first connection point is greater than the corresponding winding turns of the second connection point; Switching module, including relay K1, the relay K1 is electrically connected with at least one of the first connection point and the second connection point.

2. The energy storage power supply inverter circuit of claim 1, wherein, The input module includes battery interface, MOS tube Q1 and MOS tube Q6, the MOS tube Q1 and the MOS tube Q6 are electrically connected with the battery interface respectively, and the transformer T1 is electrically connected with the MOS tube Q1 and the MOS tube Q6 respectively.

3. The energy storage power supply inverter circuit of claim 2, wherein, The boost module further includes capacitor C1 and rectifier BD1, the first end of the capacitor C1 is electrically connected with the transformer T1, and the second end of the capacitor C1 is electrically connected with the rectifier BD1.

4. The energy storage power supply inverter circuit of claim 2, wherein, The switching module further includes diode D1, and the first end of the diode D1 is electrically connected with the relay K1.

5. The energy storage power supply inverter circuit of claim 4, wherein, The switching module further includes triode Q7 and resistance R1, the first end of the triode Q7 is electrically connected with the second end of the diode D1, and the second end of the triode Q7 is electrically connected with the first end of the resistance R1.

6. The energy storage power supply inverter circuit of claim 5, wherein, The switching module further includes resistance R2 and triode Q8, the first end of the resistance R2 is electrically connected with the second end of the resistance R1, and the second end of the resistance R2 is electrically connected with the triode Q8.

7. The energy storage power supply inverter circuit of claim 6, wherein, The switching module further includes resistance R3, the first end of the resistance R3 is electrically connected with the triode Q8, and the second end of the triode is grounded.

8. The energy storage power supply inverter circuit of claim 3, wherein, The boost module further includes capacitor EC1, the first end of the capacitor EC1 is electrically connected with the rectifier BD1, and the second end of the capacitor EC1 is grounded.

9. The energy storage power supply inverter circuit of claim 2, wherein, Further including first interface, the first interface is electrically connected with the MOS tube Q1.

10. The energy storage power supply inverter circuit of claim 2, wherein, Further including second interface, the second interface is electrically connected with the MOS tube Q6.

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