High-voltage pulse capacitor

Abstract

The utility model belongs to the field of capacitor equipment, and particularly relates to a high-voltage pulse capacitor which comprises a core module composed of a plurality of capacitor elements, the capacitor elements are connected end to end in series to form a cylindrical capacitor unit, and a plurality of cylindrical capacitor units are arranged in the same plane in parallel to form a layered capacitor unit. The core module is formed by stacking a plurality of layered capacitor units, the cylindrical capacitor units of the adjacent layered capacitor units are arranged in a plug-in and staggered manner, every two or three serially connected capacitor elements in the same layered capacitor unit are connected in parallel and converged through a flexible conductor, and the capacitor solves the problem of voltage and current sharing of the elements through the connection characteristic of the capacitor elements. The current and the voltage of each element are kept consistent, premature capacitance failure of the elements is avoided when the capacitor is under high voltage and large current, the service life of the whole capacitor equipment is prolonged, the core size can be reduced through the plug-in dislocation arrangement of the capacitor units, and the energy storage ratio can be improved.

Description

Technical Field

[0001] The utility model belongs to the field of capacitor equipment, and in particular relates to a high-voltage pulse capacitor. Background Art

[0002] High voltage pulse capacitors are widely used in situations where a large amount of energy needs to be released quickly, such as particle accelerators, laser equipment, electromagnetic weapons, etc. They meet the requirements of high voltage, high current, fast charging and discharging, and high energy storage ratio in related situations. Existing high voltage pulse capacitors mainly include three parts: a core module, a shell that fits the core module, and a cover plate that encapsulates the shell. The cover plate is provided with electrodes that are electrically connected to the core module. The core module is composed of multiple capacitor elements connected in series and parallel. The capacitor elements are connected by copper plates for busbar connection. See Figure 2 Existing high-voltage pulse capacitors have the disadvantages of low energy storage ratio and short life. For example, the life of a single capacitor element can reach 30,000 to 40,000 times according to test verification, but after being assembled into a pulse capacitor, the operating life of the entire capacitor is only about 10,000 times, resulting in high maintenance costs. Utility Model Content

[0003] The purpose of the utility model is to provide a voltage pulse capacitor with long service life and high energy storage ratio.

[0004] The technical solution to achieve the above-mentioned purpose includes the following contents.

[0005] A high voltage pulse capacitor comprises a core module composed of a plurality of capacitor elements, wherein the capacitor elements are connected end to end in series to form a columnar capacitor unit, and a plurality of columnar capacitor units are arranged in parallel in the same plane to form a layered capacitor unit. The core module is formed by stacking a plurality of layered capacitor units, and the columnar capacitor units of adjacent layered capacitor units are arranged in a staggered manner with gaps, and every two or three series-connected capacitor elements in the same layered capacitor unit are connected in parallel and converged through a soft conductor, and adjacent layered capacitor units are connected in parallel and converged through a soft conductor arranged outside the core module.

[0006] Furthermore, the conductor is a copper braided tape.

[0007] Furthermore, an insulating layer is provided between adjacent layered capacitor units to improve the insulation of the interlayer capacitor units and optimize the capacitor performance.

[0008] Furthermore, the two capacitor elements connected in series are fixed by heating a heat shrink sleeve.

[0009] The above-mentioned high-voltage pulse capacitor adopts a core module structure different from the prior art. The problem of equal voltage and current of components is solved through the connection characteristics of capacitor components, ensuring that the current and voltage of each component remain consistent, and ensuring that the capacitor will not prematurely decay under high voltage and high current, thereby extending the life of the entire capacitor equipment. The life of the high-voltage pulse capacitor of the utility model is almost the same as that of a single component. The staggered deployment of columnar capacitor units can reduce the core volume, which is beneficial to improving the energy storage ratio. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Figure 1 A schematic diagram of the core module structure of a high voltage pulse capacitor of an embodiment;

[0011] Figure 2 The figure is a schematic diagram of the core module structure of a high voltage pulse capacitor in the prior art.

[0012] In the figure, 1. cylindrical capacitor unit; 2. layered capacitor unit; 3. copper braided belt. DETAILED DESCRIPTION

[0013] The present invention is described in detail below in conjunction with the embodiments and drawings.

[0014] See also Figure 1 A high voltage pulse capacitor comprises a core module composed of a plurality of capacitor elements, wherein the core module is formed by stacking four layered capacitor units 2, an insulating layer is arranged between adjacent layered capacitor units 2, each layered capacitor unit 2 is composed of 8-9 columnar capacitor units 1 arranged in parallel in the same plane, each columnar capacitor unit 1 is composed of 9 capacitor elements connected in series end to end, the columnar capacitor units 1 of adjacent layered capacitor units 2 are arranged in a staggered manner, every two or three capacitor elements connected in series in the same layered capacitor unit 2 are fixed by heat shrink sleeves and heat-baked, and are connected in parallel and converged by copper braided tapes 3, and adjacent layered capacitor units 2 are connected in parallel and converged by copper braided tapes 3 arranged on the outside of the core module.

[0015] High-voltage pulse capacitors generate electric force when working, which can easily loosen the conductor welding points and cause poor contact. Compared with the whole copper plate convergence in the prior art, the high-voltage pulse capacitor of the utility model adopts a soft copper braided belt 3 for parallel convergence, which can adapt to the high-voltage working environment, buffer the vibration caused by the electric force, and is beneficial to improving the working stability of the capacitor equipment; each layered capacitor unit 2 is first connected in parallel for convergence, and then the layered capacitor units 2 are connected in parallel on the outside of the core module, which is beneficial to add an insulating layer between the layered capacitor units 2, improve the insulation of the interlayer capacitor units, and improve the working stability of the capacitor equipment; the use of columnar capacitor units 1 can reduce the volume of the core module, thereby reducing the space of the capacitor equipment. The energy storage ratio of the utility model is higher. The utility model adopts two or three strings and then parallel convergence. The voltage and current borne by each capacitor element are the same, so that the life of the entire capacitor is consistent with the life of a single capacitor element, thereby improving the life of the capacitor equipment.

Claims

1. A high voltage pulse capacitor, comprising a core module composed of a plurality of capacitor elements, wherein the capacitor elements are connected end to end in series to form a cylindrical capacitor unit, wherein a plurality of cylindrical capacitor units are arranged in parallel in the same plane to form a layered capacitor unit, wherein the core module is formed by stacking a plurality of layered capacitor units, and wherein: The columnar capacitor units of adjacent layered capacitor units are arranged in an interstitial and staggered manner. Every two or three capacitor elements connected in series in the same layered capacitor unit are connected in parallel and converged through a soft conductor. Adjacent layered capacitor units are connected in parallel and converged through a soft conductor arranged on the outside of the core module. The conductor is a copper braided belt. An insulating layer is provided between adjacent layered capacitor units. The two or three capacitor elements connected in series are fixed by heating and drying with a heat shrink sleeve.

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