Transformation power switcher of charging and discharging device

Abstract

The electric power switching device is designed for an unequal-voltage charging and discharging switching system of a charging and discharging device, has three gears of charging, disconnecting and discharging, forms a direct-current charging and discharging system with at least two groups of equal-voltage energy storage modules, a charging power supply and a power receiving body, and can control low-voltage charging and high-voltage discharging of a multi-stage energy storage body.

Description

TECHNICAL FIELD

[0001] The utility model discloses a switching switch for the charging and discharging device of the power storage system. The power storage system realizes the cycle operation of "energy storage - disconnection - discharging - disconnection - energy storage" according to a certain period. A switching control device is needed. The power switcher can combine the equal-pressure energy storage modules of the multi-stage energy storage body into different series and parallel systems to realize the charging and discharging operation of different voltage levels. The utility model belongs to the automatic switching operation switch of power. BACKGROUND

[0002] With the vigorous development of new energy power generation, the defects of unstable new energy power are increasingly prominent. Therefore, the importance of power storage gradually appears. According to the characteristics of the power charging and discharging system, the lower the voltage of the energy storage module itself during charging, the higher the operation efficiency, and vice versa. The voltage of the energy storage module itself of the traditional charging and discharging system is generally the same during charging and discharging, so it is difficult to achieve high efficiency during charging and discharging. The voltage power switching system of the charging and discharging device is designed by setting multi-stage energy storage bodies, so that the multi-stage energy storage bodies are connected in parallel during charging and connected in series during discharging, thereby realizing the purpose of low voltage during charging and high voltage during discharging. This system ensures high efficiency during charging and discharging. The key equipment to protect this system is the voltage power switcher of the charging and discharging device. This equipment has not entered the market yet, and the corresponding control system has not been developed. SUMMARY

[0003] The inventor designs a new voltage power switcher of the charging and discharging device for the voltage power switching system of the charging and discharging device, and the characteristics are as follows:

[0004] The condition controller is arranged outside the case, the switching execution mechanism and the insulation line plate are arranged inside the case, the wiring terminal is arranged at the edge of the case, and the insulation box cover is attached. The positive and negative poles of the charging wiring terminal can be connected with the positive and negative poles of the charging power supply; the positive and negative poles of the discharging wiring terminal can be connected with the positive and negative poles of the power receiver; and the positive and negative poles of the energy storage body wiring terminal can be connected with the positive and negative poles of the energy storage body.

[0005] When the condition control switch is turned to charging, the switching execution mechanism is switched to the parallel state of the equal-pressure energy storage module, the working voltage of the multi-stage energy storage body is low, and the low-voltage charging body is formed. When the condition control switch is turned to discharging, the switching execution mechanism is switched to the series state of the equal-pressure energy storage module, the working voltage of the multi-stage energy storage body is high, and the high-voltage discharging body is formed. When the switching control switch is turned to disconnection, the charging operation and the discharging operation are all terminated.

[0006] The technical scheme of the utility model is as follows:

[0007] A kind of variable voltage power switch of charge and discharge device, by condition controller, switching execution mechanism, insulated line board, terminal, cabinet is formed, it is characterized in that: condition controller is arranged outside the cabinet, switching execution mechanism and insulated line board are arranged in the cabinet, terminal is arranged at the edge of the cabinet, with insulated box cover;When the cabinet is open door type, terminal is in the cabinet, and insulated box cover is not arranged, cable entrance is opened on one side or both sides of the cabinet, and condition controller is allowed to be arranged in the cabinet.

[0008] The utility model discloses the feature still at: the detection condition parameter of condition controller is: 1-7 in 8 kinds of indexes such as time, temperature, illumination, wind speed, voltage, current, power, energy storage.

[0009] The utility model discloses the feature still at: insulated line board conductor allows for strip copper plate, strip aluminum plate, single-core copper wire, multi-core copper wire, other conductive body.

[0010] The utility model discloses the feature still at: terminal contains at least 2 pairs of energy storage body positive and negative terminal;At least 1 pair of charging positive and negative terminal;At least 1 pair of discharging positive and negative terminal.

[0011] The utility model discloses the feature still at: switching execution mechanism is formed by initiative contact fixed part and passive contact fixed ware.

[0012] The utility model discloses the feature still at: initiative contact fixed part sets up at least two pairs of energy storage body positive and negative clutch contact and is connected with corresponding energy storage body positive and negative terminal through insulated line board;Passive contact fixed ware sets up charging positive and negative clutch contact and discharging positive and negative clutch contact and is connected with corresponding charging positive and negative terminal, discharging positive and negative terminal through insulated line board.

[0013] The utility model discloses the feature still at: initiative contact fixed part contact setting and passive contact fixed part contact setting position interchanges also in the range of claims.

[0014] The utility model discloses the feature still at: switching execution mechanism sets up charging, disconnecting, discharging three gears, and corresponding condition controller has three control targets.

[0015] The utility model discloses the feature still at: initiative contact fixed part and passive contact fixed part allow for different model's translation synchronous clutch, rotary synchronous clutch, synchronous electromagnetic attracter and other contact clutch.

[0016] The utility model discloses the feature still at: allow condition controller to set up one of three control modes such as manual, automatic and manual coexistence, intelligent switching and manual coexistence.

[0017] The utility model discloses the beneficial effect:

[0018] (1) The utility model discloses a reliable equipment guarantee for realizing the charging and discharging unequal pressure operation of the energy storage system charging and discharging device.

[0019] (2) The utility model discloses the application greatly improves the operation efficiency of the energy storage system. BRIEF DESCRIPTION OF DRAWINGS

[0020] Figure 1 It is the transformer power switch diagram of two equal pressure energy storage module interface charging and discharging device

[0021] Figure 2 It is the transformer power switch diagram of three equal pressure energy storage module interface charging and discharging device

[0022] Figure 3 It is the transformer power switch diagram of open door type typical charging and discharging device

[0023] In the drawing,

[0024] 1, condition controller 2, mainframe box

[0025] 3, active contact fixed part

[0026] 3.10, ① energy storage negative pole contact 3.11, ① energy storage positive pole contact

[0027] 3.20, ② energy storage negative pole contact 3.21, ② energy storage positive pole contact

[0028] 3.30, ③ energy storage negative pole contact 3.31, ③ energy storage positive pole contact

[0029] 4, passive contact fixed part

[0030] 4.11, ① energy storage charging contact 4.12, ① energy storage discharging contact

[0031] 4.13, ① energy storage parallel contact

[0032] 4.21, ② energy storage charging contact 4.22, ② energy storage discharging contact

[0033] 4.23, ② energy storage parallel contact

[0034] 4.31, ③ energy storage charging contact 4.32, ③ energy storage discharging contact

[0035] 4.33, ③ energy storage parallel contact

[0036] 5, charging wiring terminal insulation box cover

[0037] 5.1, charging wiring terminal positive pole 5.2, charging wiring terminal negative pole

[0038] 6. Discharge terminal insulation box cover

[0039] 6.1. Discharge terminal positive 6.2. Discharge terminal negative

[0040] 7. Accumulator terminal insulation box cover

[0041] 1.1. No. 1 accumulator terminal positive 1.0. No. 1 accumulator terminal negative

[0042] 2.1. No. 2 accumulator terminal positive 2.0. No. 2 accumulator terminal negative

[0043] 3.1. No. 3 accumulator terminal positive 3.0. No. 3 accumulator terminal negative

[0044] 8. Discharge insulation wire plate 9. Positive insulation wire plate 10. Negative insulation wire plate DETAILED DESCRIPTION

[0045] The main components of the voltage switcher of the charging and discharging device are as follows:

[0046] Main box. The main box is a carrier for placing and fixing various electrical components. The main box is divided into a closed box body and an open door type.

[0047] Charging terminal. The charging terminal is divided into positive and negative. The positive charging terminal can be one terminal or multiple terminals. The negative charging terminal can be one terminal or multiple terminals. In the case of a closed box body, the positive charging terminal and the negative charging terminal are arranged on one side of the main box, and an insulation box cover is arranged at the same time. In the case of an open door type, the charging terminal can be arranged in the main box, and the insulation box cover can not be arranged. The charging terminal is fixed on the main box, but is insulated from the main box.

[0048] Discharge and terminal. The discharge terminal is divided into positive and negative. The positive discharge terminal can be one terminal or multiple terminals. The negative discharge terminal can be one terminal or multiple terminals. In the case of a closed box body, the positive discharge terminal and the negative discharge terminal are arranged on one side of the main box, and an insulation box cover is arranged at the same time. In the case of an open door type, the discharge terminal can be arranged in the main box, and the insulation box cover can not be arranged. The discharge terminal is fixed on the main box, but is insulated from the main box.

[0049] Energy storage terminal. The energy storage terminal is provided with a port connected with an energy storage body, and comprises a positive pole of the energy storage terminal and a negative pole of the energy storage terminal, which form a pair. In the device, there are at least two pairs of the energy storage terminals, and the number is not limited. In the case of a closed box body, the energy storage terminal is arranged at one end of the host box outside, and an insulating box cover is arranged. The energy storage terminal is fixed on the host box but is insulated from the host box. In the case of an open door type host box, the charging terminal can be arranged in the box, and the insulating box cover can not be arranged.

[0050] Active contact fixing member and passive contact fixing member. The active contact fixing member and the passive contact fixing member are core components of the switching execution mechanism, and a series of contacts and insulating wire boards connected with the contacts are arranged thereon. Through the action of the active contact fixing member, the parallel relationship of two or more energy storage bodies during charging is realized, the series relationship of two or more energy storage bodies during discharging is realized, and the charging circuit and the discharging circuit are simultaneously disconnected during disconnection. The action mode of the active contact fixing member can be a translation mode, a rotation mode, an electromagnetic attraction mode, or other irregular motion modes. The specific connection relationship of each contact is described in detail in the following specific embodiments.

[0051] Condition controller. The condition controller controls the switching execution mechanism. The condition controller has three gears, namely, charging operation, stop operation, and discharging operation. The control mode of the condition controller includes manual control, combination of manual intervention and automatic control, and combination of manual intervention and intelligent control. The detection condition parameters of the condition controller include one or several of the following eight indexes: time, temperature, illumination, wind speed, voltage, current, power, and energy storage degree. Different control programs are selected according to different types of charging and discharging application systems and specific scene requirements.

[0052] When the device is used in a high-voltage charging and discharging system, a charging circuit breaker is arranged between the positive pole of the charging terminal and the positive pole of the charging power supply, and a power generation circuit breaker is arranged between the positive pole of the discharging terminal and the positive pole of the power receiver, so as to ensure that each switching contact is not damaged by high-voltage arc. Before the charging and discharging switching, the charging circuit breaker and the discharging circuit breaker are required to be disconnected, and after the switching is completed, the charging circuit breaker and the discharging circuit breaker are restored to be closed.

[0053] In the following, the scheme of the utility model is further described with respect to specific embodiments.

[0054] Embodiment 1: A voltage conversion power switch of a two-equal-pressure energy storage module interface charging and discharging device. As shown in the figure, the closed host box, the charging terminal is external, the discharging terminal is external, the energy storage terminal is external, and the condition controller is external. The energy storage terminal is two groups, which can be connected with two equal-pressure energy storage modules. Figure 1 Figure 1 ​In the figure, the arrow dotted line represents the control relationship between the condition controller 1 and the active contact fixing part 3. All the components are arranged on the main box 2. The switching mechanism operates in a translational manner.

[0055] The No. 1 energy storage negative contact 3.10, the No. 1 energy storage positive contact 3.11, the No. 2 energy storage negative contact 3.20 and the No. 2 energy storage positive contact 3.21 are fixed on the active contact fixing part 3. The No. 1 energy storage negative contact 3.10 is connected with the No. 1 energy storage terminal negative 1.0 and the discharge terminal negative 6.2 through the negative insulation wire plate 10, and the No. 1 energy storage positive contact 3.11 is connected with the No. 1 energy storage terminal positive 1.1 through the positive insulation wire plate 9; the No. 2 energy storage negative contact 3.20 is connected with the No. 2 energy storage terminal negative 2.0 through the negative insulation wire plate 10, and the No. 2 energy storage positive contact 3.21 is connected with the No. 2 energy storage terminal positive 2.1 through the positive insulation wire plate 9.

[0056] The No. 1 energy storage charging contact 4.11, the No. 1 energy storage discharge contact 4.12, the No. 1 energy storage parallel contact 4.13, the No. 2 energy storage charging contact 4.21, the No. 2 energy storage discharge contact 4.22 and the No. 2 energy storage parallel contact 4.23 are fixed on the passive contact fixing part 4. The No. 1 energy storage charging contact 4.11 and the No. 2 energy storage charging contact 4.21 are connected with the charging terminal positive 5.1 through the positive insulation wire plate 9, the No. 1 energy storage parallel contact 4.13 and the No. 2 energy storage parallel contact 4.23 are connected with the charging terminal negative 5.2 through the negative insulation wire plate 10, the No. 1 energy storage discharge contact 4.12 is connected with the No. 2 energy storage terminal negative 2.0 through the discharge insulation wire plate 8, and the No. 2 energy storage discharge contact 4.22 is connected with the discharge terminal positive 6.1 through the positive insulation wire plate 9.

[0057] In the figure, when the condition controller 1 issues a charging instruction, the active contact fixing part 3 moves to the left, the No. 1 energy storage negative contact 3.10 is in conduction with the No. 1 energy storage parallel contact 4.13, the No. 1 energy storage positive contact 3.11 is in conduction with the No. 1 energy storage charging contact 4.11, and the No. 1 equal-pressure energy storage module starts to charge; the No. 2 energy storage negative contact 3.20 is in conduction with the No. 2 energy storage parallel contact 4.23, the No. 2 energy storage positive contact 3.21 is in conduction with the No. 2 energy storage charging contact 4.21, and the No. 2 equal-pressure energy storage module starts to charge.

[0058] In the figure, when the condition controller 1 issues a discharge instruction, the active contact fixing part 3 moves to the right, the No. 1 energy storage positive contact 3.11 is in conduction with the No. 1 energy storage discharge contact 4.12, and the No. 2 energy storage positive contact 3.21 is in conduction with the No. 2 energy storage discharge contact 4.22, and the No. 1 equal-pressure energy storage module and the No. 2 equal-pressure energy storage module start to discharge. In this case, the No. 1 equal-pressure energy storage module and the No. 2 equal-pressure energy storage module operate in series, and the discharge voltage is twice that of a single equal-pressure energy storage module.

[0059] In the figure, when the condition controller 1 issues a disconnect command, the active contact holder 3 and the passive contact holder 4 are returned to the home position, the charging is stopped, and the discharging is stopped.

[0060] Embodiment 2: The voltage conversion power switch of the three equal-pressure energy storage module interface charging and discharging device, as shown in the figure. The closed main box, the charging wiring terminal is external, the discharging wiring terminal is external, the energy storage wiring terminal is external, the charging circuit breaker is external, the discharging circuit breaker is internal, and the condition controller is external. The energy storage wiring terminal is three groups, which can be connected with three equal-pressure energy storage modules. Figure 2 In the figure, the arrow dotted line represents the control relationship between the condition controller 1 and the active contact holder 3. All components are arranged on the main box 2. The switching mechanism is a translational type. Figure 2

[0061] Compared with embodiment 1, the switching execution mechanism 2 of the three equal-pressure energy storage module interface voltage conversion power switching system adds a pair of energy storage positive and negative wiring terminals, that is, the ③ energy storage wiring terminal positive 3.1 and the ③ energy storage wiring terminal negative 3.0. The corresponding active contact holder 3 is additionally provided with the ③ energy storage negative contact 3.30 and the ③ energy storage positive contact 3.31. The corresponding passive contact holder 4 is additionally provided with the ③ energy storage charging contact 4.31, the ③ energy storage discharging contact 4.32, and the ③ energy storage parallel contact 4.33. A discharging insulation wire plate 8 is additionally provided.

[0062] The ③ energy storage negative contact 3.30 is connected with the ③ energy storage wiring terminal negative 3.0 through the negative insulation wire plate 10. The ③ energy storage positive contact 3.31 is connected with the ③ energy storage wiring terminal positive 3.1 through the positive insulation wire plate 9. The ③ energy storage charging contact 4.31, the ② energy storage charging contact 4.21, and the ① energy storage charging contact 4.11 are connected with the charging wiring terminal positive 5.1 through the positive insulation wire plate 9. The ③ energy storage discharging contact 4.32 is connected with the discharging wiring terminal positive 6.1 through the positive insulation wire plate 9. The ③ energy storage parallel contact 4.33, the ② energy storage parallel contact 4.23, and the ① energy storage parallel contact 4.13 are connected with the charging wiring terminal negative 5.2 through the negative insulation wire plate 10. In this embodiment, the ② energy storage discharging contact 4.22 is connected with the ③ energy storage negative contact 3.30 and the ③ energy storage wiring terminal negative 3.0 through the discharging insulation wire plate 8.

[0063] ​In the figure, when the condition controller 1 issues a charging instruction, the active contact fixed part 3 moves to the left, the ① energy storage negative contact 3.10 is in conduction with the ① energy storage parallel contact 4.13, and the ① energy storage positive contact 3.11 is in conduction with the ① energy storage charging contact 4.11; the ② energy storage negative contact 3.20 is in conduction with the ② energy storage parallel contact 4.23, and the ② energy storage positive contact 3.21 is in conduction with the ② energy storage charging contact 4.21; the ③ energy storage terminal negative 3.0 is in conduction with the ③ energy storage parallel contact 4.33, and the ③ energy storage positive contact 3.31 is in conduction with the ③ energy storage charging contact 4.31. The ① equal-pressure energy storage module, the ② equal-pressure energy storage module, and the ③ equal-pressure energy storage module start to charge when they are online.

[0064] In the figure, when the condition controller 1 issues a discharging instruction, the active contact fixed part 3 moves to the right, the ① energy storage positive contact 3.11 is in conduction with the ① energy storage discharging contact 4.12; the ② energy storage positive contact 3.21 is in conduction with the ② energy storage discharging contact 4.22; and the ③ energy storage positive contact 3.31 is in conduction with the ③ energy storage discharging contact 4.32. The ① equal-pressure energy storage module, the ② equal-pressure energy storage module, and the ③ equal-pressure energy storage module start to discharge when they are online. In this case, the ① equal-pressure energy storage module, the ② equal-pressure energy storage module, and the ③ equal-pressure energy storage module are connected in series to discharge, and the discharging voltage is 3 times that of a single equal-pressure energy storage module.

[0065] Example 3: The voltage power switch of the open-door type typical charging and discharging device, as shown in Figure 3 The voltage power switch of the open-door type typical charging and discharging device has the same configuration, function, and operation mode as those of Example 1, but the main box structure is different. The open-door main box has built-in charging terminals, built-in discharging terminals, built-in energy storage terminals, and an external condition controller. The energy storage terminals are two groups, which can be connected to two equal-pressure energy storage modules.

[0066] Figure 3 In the figure, the charging terminal insulation box cover 5, the discharging terminal insulation box cover 6, and the energy storage terminal insulation box cover 7 can not be provided.

[0067] The voltage power switch of the charging and discharging device with more equal-pressure energy storage module interfaces is similar to that of Example 1, Example 2, and Example 3, and belongs to the scope of the claims of the present application, which will not be described here.

[0068] Increasing the number of positive and negative poles of the charging terminals will not change the action mechanism and principle of the switching execution mechanism 2, but only increase the charging power, which belongs to the scope of the claims of the present application, which will not be described here.

[0069] Increasing the number of positive and negative poles of the discharging terminals will not change the action mechanism and principle of the switching execution mechanism 2, but only increase the discharging power, which belongs to the scope of the claims of the present application, which will not be described here.

Claims

1. A transformer power switch for a charging and discharging device, comprising a condition controller, a switching actuator, an insulating wire plate, terminals, and a chassis, characterized in that: The condition controller is located on the outside of the chassis, the switching actuator and the insulating wire plate are located inside the chassis, the wiring terminals are located on the edge of the chassis, and an insulating box cover is attached. When the chassis is a door-type design, the wiring terminals are located inside the chassis without an insulating cover. Cable entry and exit points are located on one or both sides of the chassis. The condition controller may be installed inside the chassis.

2. The transformer power switch of the charging and discharging device according to claim 1, characterized in that: The detection parameters of the condition controller are 1 to 7 of the following 8 indicators: time, temperature, illuminance, wind speed, voltage, current, power, and energy storage.

3. The transformer power switch of the charging and discharging device according to claim 1, characterized in that: The conductor of the insulated wire board may be a strip of copper plate, a strip of aluminum plate, a single-core copper wire, or a multi-core copper wire.

4. The transformer power switch of the charging and discharging device according to claim 1, characterized in that: The terminal block includes at least two pairs of positive and negative terminals for the energy storage body; at least one pair of positive and negative terminals for charging; and at least one pair of positive and negative terminals for discharging.

5. The transformer power switch of the charging and discharging device according to claim 1, characterized in that: The switching actuator consists of an active contact retainer and a passive contact retainer.

6. The transformer power switch of the charging and discharging device according to claim 5, characterized in that: The active contact fixing component is provided with at least two pairs of positive and negative clutch contacts for the energy storage body, which are connected to the corresponding positive and negative terminals of the energy storage body through an insulating wire plate; the passive contact fixing component is provided with positive and negative clutch contacts for charging and discharging, which are connected to the corresponding positive and negative terminals for charging and discharging through an insulating wire plate.

7. The transformer power switch of the charging and discharging device according to claim 1, characterized in that: The positions of the active contact fixing element and the passive contact fixing element can be interchanged.

8. The transformer power switch of the charging and discharging device according to claim 1, characterized in that: The actuator can be switched to three positions: charging, disconnecting, and discharging. The corresponding condition controller has three control objectives.

9. The transformer power switch of the charging and discharging device according to claim 5, characterized in that: The active contact fixing parts and passive contact fixing parts can be translational synchronous clutches, rotary synchronous clutches, and synchronous electromagnetic actuators with different shapes.

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