CN-224218111-U - Discharge structure applied to piezoresistor and uninterrupted power supply

CN224218111UCN 224218111 UCN224218111 UCN 224218111UCN-224218111-U

Abstract

The utility model provides a discharge structure applied to a piezoresistor and an uninterruptible power supply, and relates to the technical field of overvoltage protection, wherein the discharge structure is arranged between a first electric circuit and a ground wire; the first voltage dependent resistor is connected to the first voltage dependent resistor, a first discharge end is arranged on the first voltage dependent resistor in an extending mode from the first voltage dependent resistor to the ground wire, a first ground wire discharge end is arranged on the ground wire corresponding to the position where the first discharge end is located, a first gap is reserved between the first discharge end and the first ground wire discharge end, and a discharge structure of the first voltage dependent resistor is formed in a matched mode. According to the technical scheme, the metal oxide piezoresistor is combined with the copper foil discharge end discharge, the characteristics of high response speed and controllable discharge threshold value of the copper foil discharge end discharge are utilized, and the nonlinear volt-ampere characteristics of the MOV are combined to work cooperatively, so that surge current is discharged more rapidly, voltage is clamped in a safety range, and the overvoltage protection performance of the piezoresistor is effectively improved.

Inventors

XIE JUNLONG
YANG KAIHUA

Assignees

东莞市硕擎能源科技有限公司

Dates

Publication Date: 20260508
Application Date: 20250430

Claims (10)

1. The discharge structure is characterized in that the discharge structure is arranged between a first electric circuit and a ground wire, the first electric circuit is used for being connected with the first piezoresistor, a first discharge end is arranged on the first piezoresistor in an extending mode from the first electric circuit to the ground wire, a first ground wire discharge end is arranged on the ground wire at a position corresponding to the first discharge end, and a first gap is reserved between the first discharge end and the first ground wire discharge end and is matched with the first piezoresistor to form the discharge structure of the first piezoresistor.
2. The discharge structure of claim 1, wherein the ground wire is located between the first electrical circuit and the second electrical circuit, the second electrical circuit is connected to a second varistor, the second varistor extends from the second electrical circuit to the ground wire and is provided with a second discharge end, the ground wire is provided with a second ground wire discharge end corresponding to the position where the second discharge end is located, and a second gap is formed between the second discharge end and the second ground wire discharge end and is matched to form the discharge structure of the second varistor.
3. The discharge structure of claim 2, wherein the first discharge end, the second discharge end, the first ground discharge end, and the second ground discharge end are each made of copper foil, and the copper foil has a size of 0.1-0.5mm.
4. The discharge structure of claim 2 wherein the shape of the first discharge end and the first ground discharge end, and the shape of the second discharge end and the second ground discharge end are each pointed, the pointed shape being one of a triangular pointed shape and a tapered pointed shape.
5. The discharge structure of claim 4 wherein the tip-like curvature is less than 0.1mm in size.
6. The discharge structure of claim 2 wherein the magnitude of the first gap is determined based on a preset operating voltage and a preset discharge threshold of the first varistor and the magnitude of the second gap is determined based on a preset operating voltage and a preset discharge threshold of the second varistor.
7. The discharge structure of claim 2 wherein the first discharge end, the second discharge end, the first ground discharge end, and the second ground discharge end are co-axial.
8. The discharge structure of claim 2 wherein said ground wire is provided with a discharge ground, said first ground wire discharge end and said second ground wire discharge end being respectively connected to said discharge ground.
9. The discharge structure of claim 2 wherein the first varistor and the second varistor are metal oxide varistors, respectively.
10. An uninterruptible power supply, the uninterruptible power supply comprising: the electric circuit at least comprises a first electric circuit, and the first electric circuit is used for connecting a first piezoresistor; ground wire and A discharge structure for a varistor as claimed in any one of claims 1-9 disposed between said first electrical line and ground.

Description

Discharge structure applied to piezoresistor and uninterrupted power supply Technical Field The utility model relates to the technical field of overvoltage protection, in particular to a discharge structure applied to a piezoresistor and an uninterruptible power supply. Background Currently, uninterruptible power supplies are often provided with overvoltage protection elements, such as metal oxide varistors (Metal Oxide Varistor, MOVs), to suppress transient surge voltages and protect the uninterruptible power supply itself and back-end load equipment from voltage spikes, lightning strikes, or grid fluctuations. However, conventional MOVs have limited response speed and energy bleeding capability under high energy impact or high frequency overvoltage conditions, resulting in undesirable protective effects. The point discharge is a phenomenon that discharge is initiated at the tip of a conductor by utilizing the electric field concentration effect, and has the advantages of high response speed and controllable discharge threshold value. However, the conventional MOV has not been designed to further enhance the overvoltage protection performance in combination with the tip discharge of the copper foil. Disclosure of utility model In view of the above, it is necessary to provide a discharge structure applied to a varistor and an uninterruptible power supply, which can achieve improvement of overvoltage protection performance by combining the varistor with a discharge end. In a first aspect, an embodiment of the utility model provides a discharge structure applied to a piezoresistor, the discharge structure is arranged between a first electric circuit and a ground wire, the first electric circuit is used for connecting the first piezoresistor, a first discharge end is arranged on the first piezoresistor in an extending mode from the first electric circuit to the ground wire, a first ground wire discharge end is arranged on the ground wire at a position corresponding to the first discharge end, and a first gap is reserved between the first discharge end and the first ground wire discharge end and is matched with the first piezoresistor to form the discharge structure of the first piezoresistor. Further, the ground wire is located between the first electric circuit and the second electric circuit, the second electric circuit is used for connecting a second piezoresistor, a second discharge end is arranged on the second piezoresistor in an extending mode from the second electric circuit to the ground wire, a second ground wire discharge end is arranged on the ground wire at a position corresponding to the second discharge end, a second gap is reserved between the second discharge end and the second ground wire discharge end, and a discharge structure of the second piezoresistor is formed in a matched mode. Further, the first discharge end, the second discharge end, the first ground wire discharge end and the second ground wire discharge end are all made of copper foil, and the size of the copper foil is 0.1-0.5mm. Further, the shapes of the first discharge end and the first ground discharge end, and the shapes of the second discharge end and the second ground discharge end are tip shapes, respectively, which are one of a triangular tip and a conical tip. Further, the tip-like curvature is less than 0.1mm in size. Further, the value of the first gap is determined according to the preset working voltage and the preset discharge threshold of the first piezoresistor, and the value of the second gap is determined according to the preset working voltage and the preset discharge threshold of the second piezoresistor. Further, the first discharge end, the second discharge end, the first ground wire discharge end and the second ground wire discharge end are located on the same axis. Further, the ground wire is provided with a discharge grounding end, and the first ground wire discharge end and the second ground wire discharge end are respectively connected to the discharge grounding end. Further, the first piezoresistor and the second piezoresistor are respectively metal oxide piezoresistors. In a second aspect, an embodiment of the present utility model provides an uninterruptible power supply, where the uninterruptible power supply includes an electrical circuit, a ground wire, and the above-mentioned discharge structure applied to a varistor, the electrical circuit includes at least a first electrical circuit, the first electrical circuit is used for accessing the first varistor, and the discharge structure applied to the varistor is disposed between the first electrical circuit and the ground wire. The discharge structure and uninterrupted power supply applied to the piezoresistor combine the metal oxide piezoresistor with the copper foil discharge end discharge, and utilize the characteristics of high discharge response speed and controllable discharge threshold of the copper foil discharge end discharge to combine th