A charging pile DC meter with built-in shunt

Abstract

A charging pile DC meter with a built-in shunt uses a single-layer board structure, consisting of a manganese bronze plate and copper plates welded to both sides. L-shaped voltage sampling points are set at the junctions of the copper and manganese bronze plates on both sides, with a first flat pin extending from the top of the vertical portion for voltage sampling. Another sampling point is also an L-shaped plate, with two spaced-ahead extension plates extending from the top of its vertical portion. One extension plate has a second flat pin at its top, symmetrical to the first pin, while the other extension plate has a third flat pin at its top to power the DC meter. The width of all three flat pins is smaller than the width of their respective base plates, forming a stepped structure. The height of the extension plates is consistent with the height of the vertical portion of the sampling point on the right, ensuring accurate insertion and positioning. This design, through a single-layer board structure and flat pins directly connecting to the DC meter PCB, eliminates external wire connections, effectively eliminates electromagnetic interference, and improves sampling accuracy. Simultaneously, the highly integrated design significantly reduces the size and optimizes the space utilization of the charging pile.

Description

Technical Field

[0001] This utility model relates to a built-in shunt in a DC meter for a charging pile. Background Technology

[0002] Existing new energy vehicle charging stations all have DC meters installed. These DC meters typically work in conjunction with a shunt converter. However, existing shunt converters are quite large, as shown in Chinese patent CN202211332085.4, and are generally located outside the DC meter, connected to it via wires. This method has low space utilization and low integration. Furthermore, because of the wire connection between the DC meter and the shunt converter, electromagnetic interference is easily generated at the shunt converter's sampling end, affecting sampling accuracy. Utility Model Content

[0003] The technical problem to be solved by this utility model is to provide a built-in shunt for the DC meter of a charging pile. It adopts a single-layer board structure, is small in size, and can be directly plugged into the PCB of the DC meter and directly integrated into the inside of the DC meter, thereby improving the integration of the DC meter and the overall space utilization of the charging pile.

[0004] To solve the above-mentioned technical problems, this utility model provides a built-in shunt for a charging pile DC meter, including a horizontally arranged manganese copper plate with a left-right longitudinal direction. Two horizontally arranged copper plates with a left-right longitudinal direction are respectively provided on the left and right sides of the manganese copper plate. The manganese copper plate and the two copper plates together constitute the shunt body. Each copper plate has a load wiring hole on the side furthest from the manganese copper plate along the left-right direction. A first voltage sampling point is provided at the junction of one of the copper plates and the manganese copper plate. The first voltage sampling point is an L-shaped plate, including a horizontally arranged first horizontal plate and a first vertical plate located on the left-right side of the first horizontal plate. The lower side of the first horizontal plate is welded to the upper side of the shunt body. A first flat pin extending vertically upwards is provided on the upper side of the first vertical plate. The width of the first flat pin along the front-back direction is small. Along the width of the first vertical plate in the front-to-back direction, a second voltage sampling point is provided at the junction of another copper plate and a manganese copper plate. The second voltage sampling point is also an L-shaped plate, which includes a horizontally arranged second horizontal plate and a second vertical plate located on one side of the second horizontal plate in the left-to-right direction. The lower side of the second horizontal plate is welded to the upper side of the shunt body. The upper side of the second vertical plate is provided with two vertically upward extending extension plates arranged at intervals in the front-to-back direction. The height of the two extension plates is the same as the height of the first vertical plate. The upper side of one extension plate is provided with a vertically upward extending second flat pin. The second flat pin and the first flat pin are symmetrically positioned. The other extension plate is provided with a vertically upward extending third flat pin. The width of the second flat pin and the third flat pin in the front-to-back direction is smaller than the width of the corresponding extension plate in the front-to-back direction.

[0005] For the sake of simplicity, the built-in shunt of the DC meter in the charging pile described in this utility model will be referred to as "this shunt" in the following description.

[0006] The installation method and advantages of this shunt are as follows: It adopts a single-layer board structure, which is small in size. The three flat pins can be directly plugged into the DC meter PCB and integrated directly inside the DC meter. The first and second flat pins are two voltage sampling points, and the third flat pin supplies power to the DC meter. Since the width of the first flat pin along the front-back direction is smaller than the width of the first vertical plate along the front-back direction, and the widths of the second and third flat pins along the front-back direction are also smaller than the widths of the corresponding extension plates along the front-back direction, a step is formed at the connection between the first flat pin and the first vertical plate. A step is also formed at the connection between the second and third flat pins and the corresponding extension plates. Since the height of the two extension plates is the same as the height of the first vertical plate, the step height is the same, which plays a positioning role. Overall, it improves the integration of the DC meter and the overall space utilization of the charging pile.

[0007] To achieve better performance from this shunt, the preferred solution is as follows:

[0008] Preferably, each copper plate has a vertically penetrating limiting groove on both its front and rear sides near the manganese copper plate, with the bottom of the limiting groove and the junction between the limiting groove and the edge of the copper plate being rounded.

[0009] The limiting groove can fix the shunt body and position it inside the DC meter. Attached Figure Description

[0010] Figure 1 This is a schematic diagram of the structure of this utility model. Detailed Implementation

[0011] See Figure 1A shunt converter built into a DC meter for a charging pile includes a horizontally arranged manganese bronze plate 1 with a length direction of left and right. Two horizontally arranged copper plates 2 with a length direction of left and right are respectively provided on the left and right sides of the manganese bronze plate 1. The manganese bronze plate 1 and the two copper plates 2 together constitute the shunt converter body. Each copper plate 2 has a load wiring hole 21 on the side furthest from the manganese bronze plate 1 in the left and right direction. A first voltage sampling point 3 is provided at the junction of the right copper plate 2 and the manganese bronze plate 1. The first voltage sampling point is an L-shaped plate, including a horizontally arranged first horizontal plate 31 and a first vertical plate 32 located on the left and right sides of the first horizontal plate 31. The lower side of the first horizontal plate 31 is welded to the upper side of the shunt converter body. A first flat pin 33 extending vertically upwards is provided on the upper side of the first vertical plate 32. The width of the first flat pin 33 in the front-back direction is smaller than the width of the first vertical plate 32 in the front-back direction. A second voltage sampling point 4 is provided at the junction of the left copper plate 2 and the manganese copper plate 1. The second voltage sampling point 4 is also an L-shaped plate, which includes a horizontally arranged second horizontal plate 41 and a second vertical plate 42 located on one side of the second horizontal plate 41. The lower side of the second horizontal plate 41 is welded to the upper side of the shunt body. The upper side of the second vertical plate 42 is provided with two vertically upward extending extension plates 43 arranged at intervals. The height of the two extension plates 43 is the same as the height of the first vertical plate 32. One of the extension plates 43 is provided with a vertically upward extending second flat pin 44. The second flat pin 44 and the first flat pin 33 are symmetrically positioned. The other extension plate 43 is provided with a vertically upward extending third flat pin 45. The width of the second flat pin 44 and the third flat pin 45 in the front-back direction is smaller than the width of the corresponding extension plate 43 in the front-back direction.

[0012] Each copper plate 2 has a vertically penetrating limiting groove 5 on both its front and rear sides near the manganese copper plate 1. The bottom of the limiting groove 5 and the connection between the limiting groove 5 and the edge of the copper plate 2 are both rounded.

[0013] The installation method and advantages of this shunt are as follows: It adopts a single-layer board structure, which is small in size. The three flat pins can be directly plugged into the DC meter PCB and integrated directly inside the DC meter. The first flat pin 33 and the second flat pin 44 are two voltage sampling points, and the third flat pin 45 supplies power to the DC meter. Since the width of the first flat pin 33 in the front-back direction is smaller than the width of the first vertical plate in the front-back direction, and the widths of the second flat pin 44 and the third flat pin 45 in the front-back direction are both smaller than the widths of the corresponding extension plates 43 in the front-back direction, a step is formed at the connection between the first flat pin 33 and the first vertical plate. A step is also formed at the connection between the second flat pin 44 and the third flat pin 45 and the corresponding extension plates 43. Since the height of the two extension plates 43 is the same as the height of the first vertical plate, the step height is the same, which plays a positioning role. Overall, it improves the integration of the DC meter and the overall space utilization of the charging pile.

[0014] The limiting groove 5 can fix the shunt body and position it inside the DC meter.

Claims

1. A shunt converter built into a DC meter of a charging pile, comprising a horizontally arranged manganese bronze plate oriented left-right along its length, and two horizontally arranged copper plates oriented left-right along their length on either side of the manganese bronze plate, the manganese bronze plate and the two copper plates together forming the shunt converter body, each copper plate having a load wiring hole on the side furthest from the manganese bronze plate along its left-right direction, characterized in that: A first voltage sampling point is provided at the junction of one of the copper plates and the manganese copper plate. The first voltage sampling point is an L-shaped plate comprising a horizontally arranged first horizontal plate and a first vertical plate located to the left or right of the first horizontal plate. The lower side of the first horizontal plate is welded to the upper side of the shunt body. A first flat pin extending vertically upwards is provided on the upper side of the first vertical plate. The width of the first flat pin in the front-to-back direction is smaller than the width of the first vertical plate in the front-to-back direction. A second voltage sampling point is provided at the junction of the other copper plate and the manganese copper plate. The second voltage sampling point is also an L-shaped plate, comprising a horizontally arranged... The second horizontal plate and the second vertical plate located on one side of the second horizontal plate are provided. The lower side of the second horizontal plate is welded to the upper side of the splitter body. The upper side of the second vertical plate is provided with two vertically extending extension plates that are spaced apart from each other. The height of the two extension plates is the same as the height of the first vertical plate. The upper side of one of the extension plates is provided with a vertically extending second flat pin. The second flat pin and the first flat pin are symmetrically positioned. The other extension plate is provided with a vertically extending third flat pin. The width of the second flat pin and the third flat pin in the front-back direction is smaller than the width of the corresponding extension plate in the front-back direction.

2. The DC table built-in shunt of claim 1, wherein: Each copper plate has a vertically penetrating limiting groove on both its front and rear sides near the manganese copper plate. The bottom of the limiting groove and the junction between the limiting groove and the edge of the copper plate are rounded.

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