Metal film high-efficiency energy storage capacitor

Abstract

The utility model relates to the technical field of energy storage capacitors, in particular to a metal film high-efficiency energy storage capacitor, which comprises an insulating packaging shell, a packaging top cover, electrode lugs, a built-in heat dissipation explosion-proof assembly and a wrapped battery cell, a packaging top cover is clamped at the upper end part of the insulating packaging shell; the upper end part of the packaging top cover is fixedly connected with an electrode lug; a built-in heat dissipation explosion-proof assembly is arranged in the insulation packaging shell. A wrapped battery cell is arranged in the insulating packaging shell; the built-in heat dissipation explosion-proof assembly comprises a fixed installation ring, a fixed net pulling sleeve and a first heat conduction sleeve layer. According to the utility model, the second heat-conducting sleeve layer and the first heat-conducting sleeve layer are matched with the heat-conducting fins therebetween, so that the heat generated inside can be conducted outwards, the heat generated by the capacitor can be effectively dissipated in time, and if the heat cannot be dissipated in time due to excessive heat caused by continuous heating, gas can impact the rubber film above the exhaust hole, so that the service life of the capacitor is prolonged. And when the air pressure reaches a threshold value, a pre-cracking opening in the rubber film is broken, and the air is exhausted.

Description

Technical Field

[0001] This utility model relates to the field of energy storage capacitor technology, and in particular to high-efficiency metal thin-film energy storage capacitors. Background Technology

[0002] With the continuous development of electronic technology, the rapid rise of the new energy industry, and the sustained growth of the electric vehicle market, the demand for energy storage capacitors is also constantly increasing. Metal film high-efficiency energy storage capacitors have advantages such as high energy storage density and long life, and are suitable for energy storage and power quality regulation in the new energy field.

[0003] When existing energy storage capacitors are in use, they generate heat. However, the use of high-power equipment can cause this heat to not dissipate in time. After continuous high temperatures, the chemical properties of the internal cells change, which can easily produce gas, causing the casing to expand and explode, posing a huge threat to equipment and personnel.

[0004] Therefore, a high-efficiency metal thin-film energy storage capacitor was proposed, which increases the internal heat dissipation and protection structure, thus solving the problem that the internal heat is not dissipated in time and the shell is prone to expansion and explosion. Utility Model Content

[0005] To overcome the problem that during the use of lead screw energy storage capacitors, the internal components generate heat, and the use of high-power equipment can lead to the inability to dissipate the heat in time. This can cause the internal cells to change chemical properties after continuous high temperature, easily generating gas, which can cause the casing to expand and explode, posing a great threat to equipment and personnel. Therefore, a high-efficiency metal thin film energy storage capacitor is proposed.

[0006] The technical solution of this utility model is as follows: a metal thin film high-efficiency energy storage capacitor, comprising an insulating encapsulation shell, an encapsulation top cover, electrode ears, a built-in heat dissipation and explosion-proof component, and a wrapped battery cell; the upper end of the insulating encapsulation shell is snapped with the encapsulation top cover; the upper end of the encapsulation top cover is fixedly connected with electrode ears; the built-in heat dissipation and explosion-proof component is provided inside the insulating encapsulation shell; the wrapped battery cell is provided inside the insulating encapsulation shell; the built-in heat dissipation and explosion-proof component includes a fixing mounting ring, a fixing mesh sleeve, and a first thermally conductive sleeve layer; two fixing mounting rings are fixedly connected to the inner wall of the insulating encapsulation shell; a fixing mesh sleeve is fixedly connected between the two fixing mounting rings; a first thermally conductive sleeve layer is provided on the inner side of the fixing mesh sleeve.

[0007] Preferably, during the use of the energy storage capacitor, the second and first thermally conductive sleeves in the built-in heat dissipation and explosion-proof components, together with the thermally conductive fins between them, can conduct the heat generated by the internal encapsulated battery cell to the outside, promoting heat dissipation. This effectively dissipates the heat generated by the capacitor during operation, keeping the internal temperature of the capacitor within a relatively stable range. This can greatly reduce capacitance fluctuations caused by temperature changes and improve the stability of the capacitor. If the heat becomes too great due to continuous heating and cannot be dissipated in time, the hot gas will be conducted upward through the hollowed-out grooves in the silicone sleeve. The gas will impact the rubber diaphragm above the exhaust port. After reaching the gas pressure threshold, it will rupture the pre-rupture opening on the rubber diaphragm. This can play a timely role when the internal pressure of the capacitor rises abnormally, quickly releasing some pressure and preventing the capacitor from exploding.

[0008] As a preferred embodiment, the built-in heat dissipation and explosion-proof component also includes heat-conducting fins, a second heat-conducting sleeve, a silicone sleeve, a built-in fixed cross support, a snap-fit ​​block, a hollow through groove, an exhaust hole, a sealing ring, a rubber membrane, and a pre-rupture opening; the inner wall of the first heat-conducting sleeve is fixedly connected to heat-conducting fins.

[0009] Preferably, a second heat-conducting sleeve is fixed to the inner side of the heat-conducting fins; a silicone sleeve is provided on the inner side of the second heat-conducting sleeve; and the encapsulated battery cell is disposed inside the silicone sleeve.

[0010] Preferably, the inner wall of the silicone sleeve is fixed with a built-in fixed cross support; the lower end of the encapsulated battery cell is fixed with a snap-fit ​​block.

[0011] Preferably, the snap-fit ​​block snaps onto the upper end of the built-in fixed cross support; the silicone sleeve has a hollow through groove inside.

[0012] Preferably, the upper end of the package top cover is provided with an exhaust hole; a sealing ring is welded to the upper end of the package top cover.

[0013] Preferably, a rubber membrane is fixed to the inner wall of the sealing ring; a pre-rupture opening is provided at the upper end of the rubber membrane.

[0014] The beneficial effects of this utility model are:

[0015] During the use of the energy storage capacitor, the second and first thermally conductive sleeves, together with the thermally conductive fins between them, can conduct the heat generated by the internal encapsulated battery cell to the outside, promoting heat dissipation. The silicone sleeve not only conducts heat but also supports the internal structure and provides cushioning. The hollowed-out slots increase the deformation resistance of the silicone sleeve, allowing it to disperse impact force when subjected to shock. The built-in fixed cross brace keeps the internal encapsulated battery cell suspended inside the insulating encapsulation shell, improving heat dissipation. If the heat becomes too great due to continuous heating and cannot dissipate in time, the hot air will be conducted upwards through the hollowed-out slots in the silicone sleeve. The gas will impact the rubber diaphragm above the exhaust port. After reaching the gas pressure threshold, it will rupture the pre-rupture opening on the rubber diaphragm, releasing the gas and preventing an explosion. Furthermore, the fixed mesh sleeve on the inner wall of the insulating encapsulation shell not only strengthens the overall structural strength but also prevents debris from flying out of the capacitor's internal components in the event of an explosion if the gas cannot escape, thus preventing damage to surrounding objects or personnel. Attached Figure Description

[0016] Figure 1 The diagram shown is a three-dimensional structural schematic of the energy storage capacitor of this utility model.

[0017] Figure 2 The diagram shown is a three-dimensional structural schematic of the fixing mesh sleeve of the energy storage capacitor of this utility model.

[0018] Figure 3 The diagram shown is a three-dimensional structural schematic of the heat-conducting fins of the energy storage capacitor of this utility model.

[0019] Figure 4 The diagram shown is a three-dimensional structural schematic of the built-in fixed cross support frame of the energy storage capacitor of this utility model.

[0020] Figure 5 This utility model is shown. Figure 3 Enlarged 3D structural diagram at point A;

[0021] Figure 6 This utility model is shown. Figure 3 A magnified three-dimensional structural diagram of point B in the middle.

[0022] Explanation of reference numerals in the attached drawings: 1. Insulating encapsulation shell; 2. Encapsulation top cover; 3. Electrode ear; 4. Wrap-up battery cell; 101. Fixing mounting ring; 102. Fixing mesh sleeve; 103. First thermal conductive sleeve layer; 104. Thermal conductive fins; 105. Second thermal conductive sleeve layer; 106. Silicone sleeve; 107. Internal fixing cross support; 108. Snap-fit ​​block; 109. Hollowed-out through groove; 110. Vent hole; 111. Sealing ring; 112. Rubber membrane; 113. Pre-rupture opening. Detailed Implementation

[0023] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0024] Please see Figures 1-6 This utility model provides an embodiment of a high-efficiency metal thin-film energy storage capacitor, comprising an insulating encapsulation shell 1, an encapsulation top cover 2, electrode ears 3, a built-in heat dissipation and explosion-proof component, and a wrapped battery cell 4; the upper end of the insulating encapsulation shell 1 is snapped with the encapsulation top cover 2; the upper end of the encapsulation top cover 2 is fixedly connected with the electrode ears 3; the insulating encapsulation shell 1 is provided with a built-in heat dissipation and explosion-proof component; the insulating encapsulation shell 1 is provided with a wrapped battery cell 4; the built-in heat dissipation and explosion-proof component includes a fixing mounting ring 101, a fixing mesh sleeve 102, and a first thermally conductive sleeve layer 103; two fixing mounting rings 101 are fixedly connected to the inner wall of the insulating encapsulation shell 1; a fixing mesh sleeve 102 is fixedly connected between the two fixing mounting rings 101; a first thermally conductive sleeve layer 103 is provided on the inner side of the fixing mesh sleeve 102.

[0025] Please see Figures 2-3 In this embodiment, the built-in heat dissipation and explosion-proof component further includes heat-conducting fins 104, a second heat-conducting sleeve 105, a silicone sleeve 106, a built-in fixed cross support 107, a snap-fit ​​block 108, a hollow through groove 109, an exhaust hole 110, a sealing ring 111, a rubber membrane 112, and a pre-rupture opening 113; the inner wall of the first heat-conducting sleeve 103 is fixedly connected to the heat-conducting fins 104, and the inner side of the heat-conducting fins 104 is fixedly connected to the second heat-conducting sleeve 105; the inner side of the second heat-conducting sleeve 105 is provided with a silicone sleeve 106; the encapsulated battery cell 4 is disposed inside the silicone sleeve 106, and the silicone sleeve 106 can both conduct heat and support the internal structure to increase buffering, and the inner wall of the silicone sleeve 106 is fixedly connected to the built-in fixed cross support 107.

[0026] Please see Figures 4-6 In this embodiment, a snap-fit ​​block 108 is fixedly connected to the lower end of the encapsulated battery cell 4, and the snap-fit ​​block 108 is snapped to the upper end of the built-in fixed cross support 107; a hollow through groove 109 is provided inside the silicone sleeve 106, which can increase the deformation resistance of the silicone sleeve 106 and disperse the impact force when it is impacted; an exhaust hole 110 is provided at the upper end of the encapsulation top cover 2; a sealing ring 111 is welded to the upper end of the encapsulation top cover 2, and a rubber membrane 112 is fixedly connected to the inner wall of the sealing ring 111; a pre-rupture opening 113 is provided at the upper end of the rubber membrane 112.

[0027] During operation, the second thermal conductive sleeve 105 and the first thermal conductive sleeve 103 work together with the thermal conductive fins 104 between them to conduct the heat generated by the internal encapsulated battery cell 4 to the outside, promoting heat dissipation. The silicone sleeve 106 can not only conduct heat, but also support the internal structure and increase the buffer. The hollow through groove 109 can increase the deformation resistance of the silicone sleeve 106, so that it can disperse the impact force when it is impacted.

[0028] Next, the built-in fixed cross support 107 can keep the internal encapsulated battery cell 4 suspended inside the insulating encapsulation shell 1, which can improve the heat dissipation effect. If the heat is too great due to continuous heating and cannot be dissipated in time, the hot air will be conducted upward through the hollow through groove 109 in the silicone sleeve 106. The gas will impact the rubber membrane 112 above the exhaust hole 110. After reaching the gas pressure threshold, it will rupture the pre-rupture hole 113 on the rubber membrane 112 to discharge the gas and avoid an explosion.

[0029] Finally, the fixed mesh sleeve 102 can not only strengthen the overall structural strength, but also block the flying debris of the internal components of the capacitor after an explosion when the gas cannot be discharged, thus avoiding damage to other objects or people in the surrounding area.

[0030] Through the above steps, the problem of internal heat not being dissipated in time, which can easily lead to the expansion of the shell and cause an explosion, is solved. The heat-conducting fins 104 between the second heat-conducting sleeve 105 and the first heat-conducting sleeve 103 can conduct the heat generated by the enclosed battery cell 4 during operation to the outside, promoting heat dissipation. This can effectively dissipate the heat generated by the capacitor during operation in a timely manner, keeping the internal temperature of the capacitor within a relatively stable range. This can greatly reduce the fluctuation of capacitance value caused by temperature changes and improve the stability of the capacitor. If the heat is too great due to continuous heating and cannot be dissipated in time, the hot air will be conducted upward through the hollow groove 109 in the silicone sleeve 106. The gas will impact the rubber diaphragm 112 above the exhaust port 110. After reaching the gas pressure threshold, it will rupture the pre-rupture opening 113 on the rubber diaphragm 112. This can play a timely role when the internal pressure of the capacitor rises abnormally, and can quickly release some pressure to prevent the capacitor from exploding.

[0031] The embodiments of the present invention have been described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of the present invention.

Claims

1. A high energy density capacitor of metal thin film, comprising an insulating encapsulation housing (1); characterized in that: The package top cover (2), the electrode lug (3), the built-in heat dissipation explosion-proof assembly and the wrapped battery cell (4) are further included; the upper end portion of the insulating package shell (1) is clamped with the package top cover (2); the upper end portion of the package top cover (2) is fixedly connected with the electrode lug (3); the built-in heat dissipation explosion-proof assembly is arranged in the insulating package shell (1); the wrapped battery cell (4) is arranged in the insulating package shell (1); the built-in heat dissipation explosion-proof assembly includes the fixed mounting ring (101), the fixed pull net sleeve (102) and the first heat conduction sleeve layer (103); the inner wall of the insulating package shell (1) is fixedly connected with two fixed mounting rings (101); the fixed pull net sleeve (102) is fixedly connected between the two fixed mounting rings (101); the first heat conduction sleeve layer (103) is arranged on the inner side of the fixed pull net sleeve (102).

2. The high energy thin film metal capacitor of claim 1, wherein: The built-in heat dissipation explosion-proof assembly further includes the heat conduction fin (104), the second heat conduction sleeve layer (105), the silica gel sleeve (106), the built-in fixed cross support (107), the clamping block (108), the hollow through groove (109), the exhaust hole (110), the sealing ring (111), the rubber film (112) and the pre-broken opening (113); the inner wall of the first heat conduction sleeve layer (103) is fixedly connected with the heat conduction fin (104).

3. The high energy thin film metal capacitor of claim 2, wherein: The inner side of the heat conduction fin (104) is fixedly connected with the second heat conduction sleeve layer (105); the inner side of the second heat conduction sleeve layer (105) is provided with the silica gel sleeve (106); the wrapped battery cell (4) is arranged in the silica gel sleeve (106).

4. The high energy thin film metal capacitor of claim 3, wherein: The inner wall of the silica gel sleeve (106) is fixedly connected with the built-in fixed cross support (107); the lower end portion of the wrapped battery cell (4) is fixedly connected with the clamping block (108).

5. The high energy thin film metal capacitor of claim 4, wherein: The clamping block (108) is clamped to the upper end portion of the built-in fixed cross support (107); the inner portion of the silica gel sleeve (106) is provided with the hollow through groove (109).

6. The high energy thin film metal capacitor of claim 1, wherein: The upper end portion of the package top cover (2) is provided with the exhaust hole (110); the upper end portion of the package top cover (2) is welded with the sealing ring (111).

7. The high energy thin film metal capacitor of claim 6, wherein: The inner wall of the sealing ring (111) is fixedly connected with the rubber film (112); the upper end portion of the rubber film (112) is provided with the pre-broken opening (113).

Images