American standard UL authentication double-gun direct current charging pile compatible with 480VIT system

Abstract

The utility model relates to the field of charging piles, in particular to an American standard UL certification double-gun direct current charging pile compatible with a 480VIT system, which comprises a 3P incoming line circuit breaker QF with the rated voltage of 480V and an input end electrically connected to a three-phase incoming line end; the rated voltage of the 3P alternating current contactor KM1 is 690V, and the input end of the 3P alternating current contactor KM1 is electrically connected to the output end of the 3P incoming circuit breaker QF; the input voltage range of the rectification modules is 260Vac-485Vac three phases, the number of the rectification modules is multiple, and the input ends of the rectification modules are connected to the output end of the 3P alternating current contactor KM1 in parallel; the input end of the charging gun is connected to the output end of the rectification module in parallel, and the output end is used for external charging; and the input end of the control module is electrically connected to the rectifier module for taking electricity, and the output end of the control module is electrically connected to the charging gun for control. The method has the effect of being compatible with the American standard and the Chinese standard at the same time.

Description

Technical Field

[0001] This application relates to the field of charging piles, and in particular to UL-certified dual-gun DC charging piles compatible with 480VIT systems. Background Technology

[0002] Currently, most charging stations in my country use the TN-S system, a three-phase five-wire power supply system. However, many regions in the world require IT power supply systems, i.e., three-phase three-wire power supply systems, such as the United States. Even in areas using TN-S systems, some areas require IT systems due to power reliability requirements. Traditional three-phase five-wire charging stations are incompatible with this type of power supply system.

[0003] Currently, there are five mainstream power supply systems: IT, TT, TN-C, TN-CS, and TN-S. Industrial power supply in some parts of the United States uses the 480V IT power supply system. To adapt to US requirements, and in accordance with UL certification requirements and the design requirements of the IT power supply system, a DC charging station compatible with the US standard 480V IT power supply system has been manufactured. Utility Model Content

[0004] To address the issue of charging stations being unable to simultaneously support both Chinese and American standards, this application provides a UL-certified dual-gun DC charging station compatible with the 480VIT system.

[0005] The UL-certified dual-gun DC charging pile compatible with the 480VIT system provided in this application adopts the following technical solution:

[0006] Compatible with 480VIT system, UL certified dual-gun DC charging stations, including:

[0007] The 3P incoming circuit breaker QF has a rated voltage of 480V and its input terminal is electrically connected to the three-phase incoming terminal.

[0008] The 3P AC contactor KM1 has a rated voltage of 690V and its input terminal is electrically connected to the output terminal of the 3P incoming circuit breaker QF.

[0009] The rectifier modules have an input voltage range of 260Vac-485Vac three-phase and there are multiple rectifier modules. The input terminals of the multiple rectifier modules are all connected in parallel to the output terminal of the 3P AC contactor KM1.

[0010] The charging gun has its input terminal connected in parallel to the output terminal of the rectifier module, and its output terminal is used for external charging.

[0011] The control module has its input terminal electrically connected to the rectifier module for power supply, and its output terminal electrically connected to the charging gun for control.

[0012] By adopting the above technical solution, it is compatible with three-phase three-wire 480V IT power supply systems, expanding the range of adaptability and the number of countries where it can be sold. This reduces the probability of increased costs due to different designs for different countries and lowers design costs.

[0013] Optionally, a 3P surge protector (SPD) is also included, with a rated voltage of 480V and a maximum continuous voltage of 580V, and the port is electrically connected to the three-phase input terminal.

[0014] By adopting the above technical solutions, surge protection is achieved, current quality is improved, and the stability of power transmission is enhanced, thus playing a protective role.

[0015] Optionally, a switching power supply UP is also included, with a voltage input range of 180-550Vac, which is electrically connected to two of the three-phase input terminals to provide DC power to the secondary side.

[0016] By adopting the above technical solution, power can be drawn adaptively and DC power can be supplied to the secondary side.

[0017] Optionally, the switching power supply UP includes at least switching power supply UP1, switching power supply UP2 and switching power supply UP3. Switching power supply UP1 and switching power supply UP2 are electrically connected to two of the three-phase input terminals, and switching power supply UP3 is connected in parallel to switching power supply UP1 and switching power supply UP2.

[0018] By adopting the above technical solutions, the power supply on the secondary side is more sufficient, allowing for the installation of more secondary side equipment.

[0019] Optionally, a 3P surge arrester circuit breaker QF1 with a rated voltage of 480V is also included, connected in series between the port of the 3P surge protector SPD and the three-phase incoming terminals.

[0020] By adopting the above technical solution, the protection of the 3P surge protector SPD is achieved, reducing the probability of damage to the 3P surge protector SPD caused by the instantaneous voltage of lightning.

[0021] Optionally, a 2P surge arrester circuit breaker QF2 with a rated voltage of 480V is also included, connected in series between the port of the switching power supply UP and the three-phase input terminals.

[0022] By adopting the above technical solution, the protection of the switching power supply UP is achieved, reducing the probability of damage to the switching power supply UP caused by the instantaneous voltage of lightning.

[0023] Optionally, it also includes a PE copper busbar, which is electrically connected to the PE terminal. The L terminal of the single-phase appliance is electrically connected to one phase of the three-phase incoming line, and the PE terminal of the single-phase appliance is electrically connected to the PE copper busbar. The L terminals of the three-phase appliances are respectively electrically connected to the three-phase incoming lines, and the PE terminal of the three-phase appliances is electrically connected to the PE copper busbar.

[0024] By adopting the above technical solution, compatibility with three-phase four-wire TN-S systems is achieved, further expanding the scope of application and sales.

[0025] Optionally, it also includes an N copper busbar, which is electrically connected to the N terminal. The N terminal of a single-phase appliance is electrically connected to the N copper busbar, and the N terminal of a three-phase appliance is electrically connected to the N copper busbar.

[0026] By adopting the above technical solution, compatibility with the three-phase five-wire TN-S system is achieved, further expanding the scope of application and sales.

[0027] In summary, this application includes at least one of the following beneficial technical effects:

[0028] 1. It is compatible with three-phase three-wire 480V IT power supply systems, expanding the range of applications and the countries where it can be sold. This reduces the probability of increased costs due to different designs for different countries, thus lowering design costs.

[0029] 2. It achieves compatibility with three-phase four-wire TN-S systems, further expanding its applicability and sales scope.

[0030] 3. It achieves compatibility with three-phase five-wire TN-S systems, further expanding its applicability and sales scope. Attached Figure Description

[0031] Figure 1 This is a circuit diagram of a UL-certified dual-gun DC charging pile compatible with the 480VIT system in this application embodiment.

[0032] Figure 2 This is a circuit diagram highlighting the N copper busbar and the PE copper busbar.

[0033] Explanation of reference numerals in the attached diagram: 1. Rectifier module; 2. Charging gun; 3. Control module; 4. N copper busbar; 5. PE copper busbar. Detailed Implementation

[0034] The following is in conjunction with the appendix Figure 1-2 This application will be described in further detail.

[0035] This application discloses a UL-certified dual-gun DC charging pile compatible with the 480VIT system. (See also...) Figure 1The UL-certified dual-gun DC charging station, compatible with the 480V IT system, includes a 3P incoming circuit breaker QF, a 3P AC contactor KM1, multiple rectifier modules 1, two charging guns 2, a control module 3, a 3P surge protector SPD, a switching power supply UP, a 3P surge arrester circuit breaker QF1, and a 2P surge arrester circuit breaker QF2. The three-phase incoming terminals are L1, L2, and L3, respectively. In this embodiment, it is a 480V IT PowerSystem, i.e., 480V. The IT AC power supply system includes a 3P incoming circuit breaker QF, a 3P AC contactor KM1, and a 3P surge protector SPD, each with three input terminals and three output terminals. The three input terminals of the 3P incoming circuit breaker QF are connected in series with L1, L2, and L3, respectively. The three input terminals of the 3P AC contactor KM1 are connected in series with the three output terminals of the 3P incoming circuit breaker QF, respectively. The input terminals of multiple rectifier modules 1 are connected in parallel with the three output terminals of the 3P AC contactor KM1, and the output terminals of multiple rectifier modules 1 are also connected in parallel with the output terminals. The charging gun 2 and the control module 3 are both connected in parallel with the output terminals of the rectifier modules 1 to draw power. The control module 3 is also electrically connected to the charging gun 2 to monitor and control the working status of the charging gun 2.

[0036] Reference Figure 1 The control module 3 typically includes a processor, push-button switches, a display screen, fuses, and lighting, and is used to monitor, display, and control the operating status of the charging gun 2. In this embodiment, the 3P incoming circuit breaker QF has a rated voltage of 480V, the 3P AC contactor KM1 has a rated voltage of 690V, the rectifier module 1 has an input voltage range of 260Vac-485Vac (three-phase), the 3P surge protector SPD has a rated voltage of 480V and a maximum continuous voltage of 580V, the switching power supply UP has a voltage input range of 180-550Vac, the 3P surge arrester circuit breaker QF1 has a rated voltage of 480V, and the 2P surge arrester circuit breaker QF2 has a rated voltage of 480V.

[0037] Reference Figure 1 The three input terminals of the 3P surge arrester circuit breaker QF1 are connected in series with L1, L2 and L3 respectively, and the three input terminals of the 3P surge protector SPD are connected in series with the three output terminals of the 3P surge arrester circuit breaker QF1 respectively.

[0038] Reference Figure 1The switching power supply UP includes at least switching power supply UP1, switching power supply UP2, and switching power supply UP3. All three switching power supplies have a voltage input range of 180-550Vac. The two input terminals of the 2P surge arrester circuit breaker QF2 are connected in series with L1 and L2 respectively. The input terminals of switching power supplies UP1 and UP2 are connected in series with the two output terminals of the 2P surge arrester circuit breaker QF2. The input terminal of switching power supply UP3 is connected in parallel between the two output terminals of the 2P surge arrester circuit breaker QF2 and the input terminal of switching power supply UP1. This allows the switching power supply UP to draw power from the three-phase input terminals, convert it into DC power, and then supply DC power to the secondary side appliances.

[0039] Reference Figure 2 If compatibility with the domestic TN-S system is required, it can also include N copper busbar 4 and PE copper busbar 5. The input terminal of N copper busbar 4 is electrically connected to the N terminal, that is, electrically connected to the neutral line. The input terminal of PE copper busbar 5 is electrically connected to the PE terminal, that is, electrically connected to the protective ground line. The L terminal of a single-phase appliance is electrically connected to L1, L2 or L3. The N terminal of a single-phase appliance is electrically connected to the output terminal of N copper busbar 4. The PE terminal of a single-phase appliance is electrically connected to the output terminal of PE copper busbar 5. The L1, L2 and L3 terminals of a three-phase appliance are electrically connected to L1, L2 and L3 respectively. The N terminal of a three-phase appliance is electrically connected to the output terminal of N copper busbar 4. The PE terminal of a three-phase appliance is electrically connected to the output terminal of PE copper busbar 5.

[0040] The implementation principle of the UL-certified dual-gun DC charging pile compatible with the 480VIT system in this application embodiment is as follows: After the three-phase power supply of the 480VIT power supply system enters from L1, L2 and L3, it enters the rectifier module 1 through the 3P incoming circuit breaker QF and the 3P AC contactor KM1 for rectification, and finally outputs charging through the charging gun 2.

[0041] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A UL-certified dual-gun DC charging pile compatible with 480VIT systems, characterized in that... include: The 3P incoming circuit breaker QF has a rated voltage of 480V and its input terminal is electrically connected to the three-phase incoming terminal. The 3P AC contactor KM1 has a rated voltage of 690V and its input terminal is electrically connected to the output terminal of the 3P incoming circuit breaker QF. The rectifier module (1) has an input voltage range of 260Vac-485Vac three-phase and there are multiple rectifier modules (1). The input terminals of multiple rectifier modules (1) are connected in parallel to the output terminal of the 3P AC contactor KM1. The charging gun (2) has its input end connected in parallel to the output end of the rectifier module (1), and its output end is used for external charging. The control module (3) has its input end electrically connected to the rectifier module (1) for power supply and its output end electrically connected to the charging gun (2) for control.

2. The UL-certified dual-gun DC charging pile compatible with the 480VIT system according to claim 1, characterized in that: It also includes a 3P surge protector (SPD) with a rated voltage of 480V and a maximum continuous voltage of 580V, and the port is electrically connected to the three-phase input terminal.

3. The UL-certified dual-gun DC charging pile compatible with the 480VIT system according to claim 1, characterized in that: It also includes a switching power supply UP, with a voltage input range of 180-550Vac, which is electrically connected to two of the three-phase input terminals to provide DC power to the secondary side.

4. The UL-certified dual-gun DC charging pile compatible with the 480VIT system according to claim 3, characterized in that: The switching power supply UP includes at least switching power supply UP1, switching power supply UP2 and switching power supply UP3. Switching power supply UP1 and switching power supply UP2 are electrically connected to two of the three-phase input terminals, and switching power supply UP3 is connected in parallel to switching power supply UP1 and switching power supply UP2.

5. The UL-certified dual-gun DC charging pile compatible with the 480VIT system according to claim 2, characterized in that: It also includes a 3P surge arrester circuit breaker QF1, with a rated voltage of 480V, which is connected in series between the port of the 3P surge protector SPD and the three-phase incoming terminals.

6. The UL-certified dual-gun DC charging pile compatible with the 480VIT system according to claim 3, characterized in that: It also includes a 2P surge arrester circuit breaker QF2, with a rated voltage of 480V, which is connected in series between the port of the switching power supply UP and the three-phase input terminals.

7. The UL-certified dual-gun DC charging pile compatible with the 480VIT system according to claim 1, characterized in that: It also includes a PE copper busbar (5), which is electrically connected to the PE end. The L end of a single-phase appliance is electrically connected to one phase of the three-phase incoming line. The PE end of the single-phase appliance is electrically connected to the PE copper busbar (5). The L ends of the three-phase appliances are respectively electrically connected to the three-phase incoming line. The PE end of the three-phase appliances is electrically connected to the PE copper busbar (5).

8. The UL-certified dual-gun DC charging pile compatible with the 480VIT system according to claim 7, characterized in that: It also includes an N copper busbar (4), which is electrically connected to the N terminal. The N terminal of a single-phase appliance is electrically connected to the N copper busbar (4), and the N terminal of a three-phase appliance is electrically connected to the N copper busbar (4).

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