Novel charging circuit of charging pile

Abstract

The utility model relates to the field of charging piles, in particular to a novel charging pile charging circuit which comprises a plurality of charging modules, a switch module, a plurality of charging guns and a plurality of over-current protection modules, and the plurality of charging modules and the plurality of over-current protection modules are arranged in a one-to-one correspondence mode. The charging guns are electrically connected to the switch module, the switch module is used for enabling the charging module to be electrically connected to the charging guns, the overcurrent protection module is located between the charging module and the switch module, and the two ends of the overcurrent protection module are electrically connected to the charging module and the switch module respectively. The charging pile has the effect of relieving the problem of overheating aging of the overcurrent protection module on the premise of ensuring that the operation and maintenance cost of the charging pile is not too high.

Description

Technical Field

[0001] This application relates to the field of charging piles, and in particular to a novel charging circuit for charging piles. Background Technology

[0002] In the field of electric vehicle charging infrastructure, charging piles, as key nodes connecting the power grid and electric vehicles, directly affect the charging efficiency and safety of electric vehicles through their performance and stability. With the rapid expansion of the electric vehicle market, charging piles are facing increasingly higher load demands and more stringent safety standards.

[0003] Currently, when multiple charging modules power a single charging gun, the overcurrent protection module simultaneously loads multiple modules. While this simplifies the circuit, it also introduces significant heat generation issues. Especially under high-load operating conditions, the overcurrent protection module is prone to overheating due to handling the current from multiple modules simultaneously. This not only accelerates the aging of the overcurrent protection module but may also trigger its protection mechanism, leading to charging interruptions and even safety hazards. In existing technologies, to mitigate the overheating and aging of fuses, external auxiliary methods are used to reduce the temperature of the overcurrent protection module, such as adding fans and / or increasing the heatsink area.

[0004] While the aforementioned technologies alleviate the problem of overheating and aging of the overcurrent protection module, they require the addition of fans and / or an increase in the heat sink area. This necessitates frequent fan maintenance and replacement during long-term operation of the charging pile, increasing the charging pile's maintenance costs. Summary of the Invention

[0005] In order to alleviate the problem of overheating and aging of the overcurrent protection module without making the operation and maintenance cost of the charging pile too high, this application provides a new charging circuit for the charging pile.

[0006] The novel charging circuit for a charging pile provided in this application adopts the following technical solution:

[0007] A novel charging circuit for a charging pile includes a charging module, a switching module, a charging gun, and an overcurrent protection module. Several charging modules, charging guns, and overcurrent protection modules are provided, with each charging module and overcurrent protection module corresponding to the others. Each charging gun is electrically connected to the switching module, which enables the charging modules to be electrically connected to the charging guns. The overcurrent protection module is located between the charging module and the switching module, with its two ends electrically connected to both the charging module and the switching module.

[0008] By adopting the above technical solution, the overcurrent protection module provides overcurrent protection for its corresponding charging module. When multiple charging modules supply power to a single charging gun or a charging gun with fewer than the number of charging modules, the current of the charging module flows through its respective overcurrent protection module before flowing to the charging gun. This makes the overcurrent protection module less prone to overheating due to the simultaneous load of multiple charging modules, reducing the need for heat dissipation through external devices. Thus, while ensuring that the operation and maintenance cost of the charging pile is not too high, the problem of overheating and aging of the overcurrent protection module is alleviated.

[0009] Optionally, the overcurrent protection module includes a fuse FS.

[0010] By adopting the above technical solution, the overcurrent protection module has a simple structure, which helps to reduce the operation and maintenance costs of charging piles.

[0011] Optionally, the switch module includes a first switch section and a second switch section. The first switch section is provided with a plurality of first switch sections, and each plurality of first switch sections is respectively configured to correspond one-to-one with each charging gun. The first switch section is used to electrically connect the charging module to the charging gun, and the second switch section is used to electrically connect the plurality of charging modules to the first switch section.

[0012] By adopting the above technical solution, when multiple charging modules are needed to power a single charging gun or a charging gun with fewer than the number of charging modules, the first and second switching parts need to be closed simultaneously, which helps to ensure the safety of the charging pile.

[0013] Optionally, the first switching unit includes a switch S1, the two ends of which are electrically connected to an overcurrent protection module and a charging gun, respectively. The second switching unit includes a switch S2, the two ends of which are electrically connected to the input terminals of a plurality of switches S1.

[0014] By adopting the above technical solution, the switch module has a simple structure, which helps to reduce the operation and maintenance costs of charging piles.

[0015] Optionally, the new charging pile charging circuit further includes an indicator module, the input terminal of which is electrically connected to the input terminal of the overcurrent protection module, and the output terminal of which is electrically connected to the output terminal of the overcurrent protection module.

[0016] By adopting the above technical solution, maintenance personnel can easily identify the specific damaged overcurrent protection module by using the indicator module after the overcurrent protection module is damaged.

[0017] Optionally, the indicating module includes a voltage divider and an indicating part, the voltage divider and the indicating part being connected in series, one end of the voltage divider being electrically connected to one end of the overcurrent protection module, and one end of the indicating part being electrically connected to the other end of the fuse.

[0018] By adopting the above technical solution, the voltage divider reduces the current of the overcurrent protection module, making the overcurrent protection module less susceptible to damage due to the large current of the charging module.

[0019] Optionally, the voltage divider includes a resistor R, and the indicator includes an indicator LED.

[0020] By adopting the above technical solution, the indicator module has a simple structure, which helps to reduce the operation and maintenance costs of charging piles.

[0021] Optionally, the new charging pile charging circuit further includes a circuit protection module, the input terminal of which is electrically connected to the charging module, and the output terminal of which is electrically connected to the overcurrent protection module.

[0022] By adopting the above technical solution, the occurrence of one part of the charging module generating a back electromotive force on another part of the charging module that is in a disconnected state is reduced, which helps to ensure the safety of the charging pile.

[0023] Optionally, the circuit protection module includes a diode D.

[0024] By adopting the above technical solution, the circuit protection module has a simple structure, which helps to reduce the operation and maintenance costs of charging piles.

[0025] In summary, this application includes at least one of the following beneficial technical effects:

[0026] 1. The overcurrent protection module provides overcurrent protection for its corresponding charging module. When multiple charging modules supply power to a single charging gun or a charging gun with fewer than one charging module, the current of the charging module flows through its respective overcurrent protection module before flowing to the charging gun. This makes the overcurrent protection module less likely to overheat due to the simultaneous load of multiple charging modules, reducing the need for heat dissipation through external devices. Thus, while ensuring that the operation and maintenance cost of the charging pile is not too high, the problem of overheating and aging of the overcurrent protection module is alleviated. Attached Figure Description

[0027] Figure 1 This is a schematic diagram of the module structure of Embodiment 1 of this application.

[0028] Figure 2 This is a topology diagram of the charging circuit of the novel charging pile in Embodiment 1 of this application.

[0029] Figure 3 This is a topology diagram of the charging circuit of the novel charging pile in Embodiment 2 of this application.

[0030] Explanation of reference numerals in the attached drawings: 1. Charging module; 2. Switching module; 21. First switching section; 22. Second switching section; 3. Charging gun; 4. Overcurrent protection module; 5. Indicator module; 51. Voltage divider section; 52. Indicator section; 6. Circuit protection module. Detailed Implementation

[0031] The following is in conjunction with the appendix Figure 1-3 This application will be described in further detail.

[0032] Example 1:

[0033] Embodiment 1 of this application discloses a novel charging circuit for a charging pile. (Refer to...) Figure 1 The novel charging pile charging circuit includes a charging module 1, a switch module 2, a charging gun 3, and an overcurrent protection module 4. Multiple charging modules 1, charging guns 3, and overcurrent protection modules 4 are provided, with each set corresponding to a specific number of charging modules 1 and overcurrent protection modules 4. Specifically, in Embodiment 1 of this application, two charging modules 1, two overcurrent protection modules 3, and two charging guns 3 are provided, with each set corresponding to a specific number of charging modules 1 and overcurrent protection modules 4. The overcurrent protection module 4 includes a fuse FS. Both the charging module 1 and the fuse FS are electrically connected to the input terminal of the switch module 2, and the charging gun 3 is electrically connected to the output terminal of the switch module 2. This allows the switch module 2 to electrically connect both the charging module 1 and the fuse FS to a specified number of or a single charging gun 3, thereby fully utilizing the charging module 1 for charging and ensuring the charging efficiency of the electric vehicle.

[0034] Reference Figure 2 The switch module 2 includes a first switch section 21 and a second switch section 22. The first switch section 21 has several units, each corresponding to a charging gun 3. Specifically, in embodiment 1 of this application, two first switch sections 21 are provided corresponding to each charging gun 3. The first switch section 21 includes a switch S1, whose input terminal is electrically connected to a fuse FS, and whose output terminal is electrically connected to the charging gun 3, so that the charging module 1 can be electrically connected to the corresponding charging gun 3 via the first switch section 21. The second switch section 22 includes a switch S2, which is located between the input terminal of switch S1 and the fuse FS, and whose two ends are electrically connected to the input terminals of the two switches S1 respectively; alternatively, the switch S2 is located between the output terminal of switch S1 and the charging gun 3, and whose two ends are electrically connected to the output terminals of the two switches S1 respectively. Both switches S1 and S2 can be selected as mechanical switches or transistor switches, or other components known to those skilled in the art for realizing circuit switching.

[0035] The implementation principle of a novel charging circuit for a charging pile in Embodiment 1 of this application is as follows: When a single charging module 1 supplies power to a single charging gun 3, the switch S1 is closed, and the electrical energy of the charging module 1 supplies power to the charging gun 3 through the fuse FS and the switch S1 in sequence, so that the fuse FS only loads a single charging module 1, thereby making the fuse FS less prone to overheating.

[0036] When two charging modules 1 supply power to a single charging gun 3, the closed switch S2 and the corresponding switch S1 of the charging gun 3 allow the current from the two charging modules 1 to pass through their respective fuses FS, and then supply power to the charging gun 3 through switches S2 and S1 or directly through switch S1. This ensures that the fuse FS only loads a single charging module 1, making the fuse FS less prone to overheating. There is no need to use external heat dissipation equipment to cool the fuse FS, thus mitigating the overheating and aging problem of the overcurrent protection module 4 while ensuring that the operation and maintenance cost of the charging pile is not too high.

[0037] Example 2:

[0038] Embodiment 2 of this application discloses a novel charging circuit for a charging pile, which, in addition to all the technical features of the novel charging circuit for a charging pile in Embodiment 1, also includes the following technical features:

[0039] Reference Figure 3 The new charging pile charging circuit also includes an indicator module 5, of which several indicator modules 5 are provided, each corresponding to one of the overcurrent protection modules 4. Specifically, in embodiment 2 of this application, the number of indicator modules 5 is set to two, each corresponding to one of the fuses FS. The indicator modules 5 and fuses FS are connected in parallel, and the input terminal of the indicator module 5 is electrically connected to the input terminal of the fuse FS, and the output terminal of the indicator module 5 is electrically connected to the output terminal of the fuse FS.

[0040] The indicator module 5 includes a voltage divider 51 and an indicator 52. The voltage divider 51 reduces the voltage of the indicator 52, and the indicator 52 issues a fault signal when the circuit is closed. The voltage divider 51 includes a resistor R, and the indicator 52 includes an indicator LED. The resistor R and the indicator LED are connected in series. One end of the resistor R is electrically connected to the input terminal of the fuse FS, and one end of the indicator LED is electrically connected to the output terminal of the fuse FS, so that the location of the damaged fuse FS can be determined by the lit indicator LED after the fuse FS trips due to overheating.

[0041] The new charging pile charging circuit also includes a circuit protection module 6, which is used to prevent reverse current from being generated in the charging module 1. The circuit protection module 6 includes a diode D, the input terminal of which is electrically connected to the charging module 1, and the output terminal of which is electrically connected to a fuse FS, so that current is difficult to flow backward into the electronic components in the charging module 1 through the diode D.

[0042] The implementation principle of a novel charging circuit for a charging pile in Embodiment 2 of this application is as follows: the current in the circuit after the fuse FS is overheated and disconnected is reduced by the resistor R, and the location of the damaged fuse FS is indicated by the indicator LED.

[0043] 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 novel charging circuit for a charging pile, characterized in that: The device includes a charging module (1), a switch module (2), a charging gun (3), and an overcurrent protection module (4). Each of the charging module (1), the charging gun (3), and the overcurrent protection module (4) is provided in multiples. Each of the multiple charging modules (1) and the multiple overcurrent protection modules (4) is arranged in a one-to-one correspondence. Each of the multiple charging guns (3) is electrically connected to the switch module (2). The switch module (2) is used to electrically connect the charging module (1) to the charging gun (3). The overcurrent protection module (4) is located between the charging module (1) and the switch module (2). The two ends of the overcurrent protection module (4) are electrically connected to the charging module (1) and the switch module (2), respectively.

2. The novel charging circuit for a charging pile according to claim 1, characterized in that: The overcurrent protection module (4) includes a fuse FS.

3. The novel charging circuit for a charging pile according to claim 1, characterized in that: The switch module (2) includes a first switch section (21) and a second switch section (22). The first switch section (21) is provided with a plurality of switches, and each of the plurality of first switch sections (21) is respectively configured to correspond one-to-one with each charging gun (3). The first switch section (21) is used to electrically connect the charging module (1) to the charging gun (3), and the second switch section (22) is used to electrically connect the plurality of charging modules (1) to the first switch section (21).

4. The novel charging circuit for a charging pile according to claim 3, characterized in that: The first switch part (21) includes a switch S1, the two ends of which are electrically connected to the overcurrent protection module (4) and the charging gun (3), respectively. The second switch part (22) includes a switch S2, the two ends of which are electrically connected to the input terminals of a plurality of switches S1.

5. The novel charging circuit for a charging pile according to claim 1, characterized in that: It also includes an indicator module (5), the input terminal of which is electrically connected to the input terminal of the overcurrent protection module (4), and the output terminal of which is electrically connected to the output terminal of the overcurrent protection module (4).

6. The novel charging circuit for a charging pile according to claim 5, characterized in that: The indicator module (5) includes a voltage divider (51) and an indicator (52). The voltage divider (51) and the indicator (52) are connected in series. One end of the voltage divider (51) is electrically connected to one end of the overcurrent protection module (4), and one end of the indicator (52) is electrically connected to the other end of the fuse.

7. The novel charging circuit for a charging pile according to claim 6, characterized in that: The voltage divider (51) includes a resistor R, and the indicator (52) includes an indicator LED.

8. The novel charging circuit for a charging pile according to claim 1, characterized in that: It also includes a circuit protection module (6), the input terminal of which is electrically connected to the charging module (1), and the output terminal of which is electrically connected to the overcurrent protection module (4).

9. A novel charging circuit for a charging pile according to claim 8, characterized in that: The circuit protection module (6) includes a diode D.

Images