Integrated super-energy storage module

Abstract

The utility model relates to an integrated super energy storage module, which is characterized by comprising a shell and a capacitor monomer, wherein the shell is provided with an accommodating cavity; a plurality of capacitor monomers are mounted in the accommodating cavity; a positive collector plate and a negative collector plate which are used for collecting current are arranged on one side close to the pins of the capacitor monomers; positive pins of the capacitor monomers are connected in parallel with the positive collector plate; the negative electrode pins of the capacitor monomers are connected in parallel with the negative electrode collector plate. One end of the positive electrode collector plate is provided with a positive electrode output port, the positive electrode output port penetrates out of the shell and is exposed, one end of the negative electrode collector plate is provided with a negative electrode output port, and the negative electrode output port penetrates out of the shell and is exposed. The energy density and the integration degree of the module are greatly improved, the performance of the module is greatly enhanced, and the capacitor module has wide market requirements in the national strategic emerging industries such as rail transit, electric automobiles, photovoltaic energy storage and intelligent electric appliances.

Description

Technical Field

[0001] This utility model relates to the field of aluminum electrolytic capacitor energy storage technology, and in particular to an integrated super energy storage module. Background Technology

[0002] Aluminum electrolytic capacitors are typically discrete structures, including products with leads, solder tabs, bolts, and other lead-out methods. Users need to combine these products in series and parallel to integrate various performance parameters. They offer advantages such as high capacity, high energy density, fast charging and discharging speed, wide operating temperature range, and long cycle life, making them suitable for high-frequency, high-power, and fast-charging and discharging applications. Therefore, they have broad market demand in national strategic emerging industries such as rail transportation, electric vehicles, photovoltaic energy storage, and smart appliances. However, current aluminum electrolytic capacitor energy storage modules suffer from problems such as temperature imbalance between parallel capacitors, leading to premature aging and failure of some capacitors. Furthermore, uneven capacitance between capacitors in series and parallel connections during use can cause static voltage imbalance, resulting in system instability and frequent faults. Utility Model Content

[0003] Therefore, it is necessary to provide an integrated super-energy storage module to solve the technical problems mentioned in the background.

[0004] The technical problem solved by this utility model is achieved through the following technical solution:

[0005] An aluminum electrolytic capacitor module is characterized by comprising a housing and capacitor cells, wherein the housing has a cavity; a plurality of capacitor cells are installed in the cavity; a positive current collector and a negative current collector are provided on the side near the pins of the capacitor cells for current collection; the positive pins of the capacitor cells are all connected in parallel with the positive current collector; the negative pins of the capacitor cells are all connected in parallel with the negative current collector; a positive output port is provided at one end of the positive current collector, the positive output port extends through the housing and is exposed; a negative output port is provided at one end of the negative current collector, the negative output port extends through the housing and is exposed.

[0006] Preferably, the positive current collector and the negative current collector are stacked one on top of the other, and an insulating partition for isolating the positive and negative electrodes is provided between the positive current collector and the negative current collector.

[0007] Preferably, the positive current collector end face is provided with a plurality of positive pin connection ports at intervals, and the positive pin of the capacitor cell is fixed to the positive pin connection port by threaded connection or welding connection. The negative current collector end face is provided with a plurality of negative pin connection ports at intervals, and the negative pin of the capacitor cell is fixed by threaded connection or welding connection.

[0008] Preferably, the negative current collector end face is further provided with a clearance through hole for the positive pin to pass through, wherein the clearance through hole is insulated from the positive pin.

[0009] Preferably, the cavity of the outer shell is provided with an adsorbent for adsorbing liquid.

[0010] Preferably, the cavity is filled with a filler that covers the capacitor cell for heat conduction.

[0011] Preferably, one end of the positive current collector is further provided with a positive input port, wherein a fuse is provided between the positive current collector and the positive input port.

[0012] Preferably, the negative electrode current collector has a negative electrode extension on one side, and a negative electrode output port is provided on the outer side of the negative electrode extension.

[0013] Preferably, the parallel combination of the individual capacitors is an aluminum electrolytic capacitor or a mixture of aluminum electrolytic capacitors and film capacitors connected in parallel.

[0014] The advantages and positive effects of this utility model are as follows: This utility model, designed for different application environments, can further solve the problems of poor heat dissipation, static voltage imbalance, and low capacity inherent in parallel modules of single-type capacitors by connecting individual capacitors in parallel or mixed parallel connections. Secondly, the modular design further improves the product's space utilization, significantly increases energy density and integration, greatly enhancing its performance. This also makes maintenance and replacement simpler and more convenient in later stages, reducing the overall maintenance cost of the equipment. Furthermore, the manufacturing process is simple, operation is convenient, and cost is low, meeting the needs of the production field. The capacitor modules using this utility model have broad market demand in national strategic emerging industries such as rail transit, electric vehicles, photovoltaic energy storage, and smart appliances. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0016] Figure 1 This is a three-dimensional structural diagram of the present invention.

[0017] Figure 2 This is a three-dimensional structural schematic diagram of the present invention from another perspective.

[0018] Figure 3This is a schematic diagram of the internal structure of this utility model.

[0019] Figure 4 This is the book Figure 3 Enlarged schematic diagrams of several parts of A in the middle.

[0020] Explanation of reference numerals: 1. Outer shell; 101. Cavity; 2. Capacitor cell; 201. Positive pin; 202. Negative pin; 3. Positive current collector; 301. Positive input port; 302. Positive output port; 303. Positive pin connection port; 4. Negative current collector; 401. Negative extension; 402. Negative output port; 403. Negative pin connection port; 404. Clearance hole; 5. Insulating partition; 6. Fuse; 7. Adsorption body; 8. Filler. Detailed Implementation

[0021] The embodiments of this utility model will be further described in detail below with reference to the accompanying drawings: The technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. The following description of at least one exemplary embodiment is merely illustrative and is in no way intended to limit this utility model or its application or use. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model. In the description of this utility model, it should be understood that the terms "upper," "lower," "bottom," "inner," "outer," etc., indicating the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings are industry-specific structural names for leads, and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Example

[0022] An aluminum electrolytic capacitor module is characterized by comprising a housing 1 and capacitor cells 2. The housing 1 has a cavity 101. A plurality of capacitor cells 2 are installed in the cavity 101. A positive current collector 3 and a negative current collector 4 are provided on the side near the pins of the capacitor cells 2 for current collection. The positive pins 201 of the capacitor cells 2 are all connected in parallel with the positive current collector 3. The negative pins 202 of the capacitor cells 2 are all connected in parallel with the negative current collector 4. One end of the positive current collector 3 has a positive output port 302, which protrudes from the housing 1 and is exposed. One end of the negative current collector 4 has a negative output port 402, which protrudes from the housing 1 and is exposed.

[0023] Specifically, the outer casing 1 is preferably made of high-temperature resistant nylon material. Nylon material has good high-temperature resistance properties, which allows it to maintain good structural stability when the capacitor cells release high temperatures or are in high-temperature environments. The outer casing 1 is provided with a cavity 101, which is used to install parallel capacitor cells 2. In this embodiment, the capacitor cells 2 are arranged in the cavity 101, and the number of capacitor cells 2 in each row is set according to actual needs.

[0024] A positive current collector 3 and a negative current collector 4 are provided on the side near the pins of capacitor cell 2 for current collection. In this embodiment, the positive current collector 3 and the negative current collector 4 can be made of copper, which has good mechanical properties and electrical conductivity, and can improve electrical and thermal conductivity. In other embodiments, highly conductive metallic materials or non-metallic conductive materials can also be used.

[0025] The preferred positive current collector 3 and negative current collector 4 are stacked vertically, with an insulating partition 5 between them for positive and negative electrode isolation. Stacking the positive and negative current collectors 3 and 4 reduces the equivalent inductance of the entire module, effectively reducing oscillation effects at switching frequencies. The insulating partition 5 between the positive and negative current collectors 3 and 4 provides insulation. Within a limited space, the energy density is significantly improved through upgrades to the internal capacitor cells 2 and changes to the module structure. Integrating the layout of the internal capacitor cells 2 improves the consistency of each capacitor cell 2 during charging and discharging, reducing the risk of uneven voltage and current distribution.

[0026] Preferably, the end face of the positive current collector 3 is provided with a plurality of positive pin connection ports 303 at intervals, and the positive pin 201 of the capacitor cell 2 is fixed to the positive pin connection port 303 by threaded connection or welding connection. The end face of the negative current collector 4 is provided with a plurality of negative pin connection ports 403 at intervals, and the negative pin 202 of the capacitor cell 2 is fixed by threaded connection or welding connection.

[0027] The positive electrode pin connection ports 303 spaced apart on the end face of the positive electrode current collector 3 correspond to the negative electrode pin connection ports 403 spaced apart on the end face of the negative electrode current collector 4. During installation, the positive electrode pin 201 of the capacitor cell 2 passes through the negative electrode current collector 4 and the insulating partition 5 and then connects with the positive electrode pin connection port 303 in the positive electrode current collector 3. The negative electrode pin 202 of the capacitor cell 2 passes through the negative electrode current collector 4 and connects with the negative electrode pin connection port 403. The positive electrode pin 201 and the negative electrode pin 202 of the capacitor cell 2 can be fixed by threaded connection. In other embodiments, welding or riveting connection methods can also be used. When the capacitor cell 2 is a bolt-type container, a threaded connection can be used. When the capacitor cell 2 is a pin-type capacitor or a horn-type capacitor, a welding connection can be used. Riveting connection can also be used according to actual needs.

[0028] The preferred negative current collector 4 end face is also provided with a clearance through hole 404 for the positive pin 201 to pass through, wherein the clearance through hole 404 is insulated from the positive pin 201.

[0029] After the positive current collector 3 and the negative current collector 4 are stacked, the positive pin 201 passes through the clearance through-hole 404 in the negative current collector 4 and the insulating partition 5 and connects with the positive pin connection port 303 in the positive current collector 3. The clearance through-hole 404 is insulated from the positive pin 201, and the diameter of the clearance through-hole 404 is much larger than the outer diameter of the positive pin 201, which serves to prevent current conduction. In another embodiment, insulating material can be filled into the clearance through-hole 404 or an insulating sleeve can be fitted to improve the insulation effect.

[0030] Preferably, the cavity 101 of the outer shell 1 is provided with an absorbent 7 for absorbing liquid. Specifically, in this embodiment, the absorbent 7 is absorbent cotton. In other embodiments, a flame-retardant liquid-absorbing material can also be used. The absorbent 7 is disposed on the side of the pressure relief valve of the capacitor cell 2, and is used to absorb electrolyte when the explosion-proof valve of the capacitor cell 2 is abnormally cracked, so as to prevent electrolyte from leaking into the positive current collector 3 and the negative current collector 4 and causing short circuit or combustion.

[0031] Preferably, the cavity 101 is filled with a filler 8 that covers the capacitor cell 2 for heat conduction.

[0032] After capacitor cell 2 is installed into the cavity 101, the internal gaps are evenly heated by a heat-conducting block and sealed with thermally conductive adhesive, resulting in a secondary integrated encapsulation. The heat-conducting block is preferably made of aluminum, and the thermally conductive adhesive can be thermally conductive silicone. This module integrates multiple capacitor cells 2 into one unit using heat-conducting blocks and thermally conductive adhesive. The side of the module away from the cavity 101 is exposed and sealed with thermally conductive adhesive, ensuring optimal overall thermal balance and preventing failure due to localized overheating caused by excessive temperature or poor heat dissipation. Furthermore, the module's internal potting process enhances its overall vibration resistance, effectively reducing the risk of breakage of the positive and negative leads of capacitor cell 2 due to vibration. Simultaneously, the potting process at the positive and negative leads of capacitor cell 2 inside the module effectively prevents oxidation and corrosion.

[0033] Preferably, a negative electrode extension 401 is provided on one side of the negative electrode current collector 4, wherein a negative electrode output port 402 is provided on the outer side of the negative electrode extension 401. The negative electrode extension 401 covers the side wall of the capacitor cell 2, and the side of the negative electrode extension 401 away from the capacitor cell 2 is exposed on the surface of the thermally conductive adhesive. The negative electrode extension 401 extends along the surface of the thermally conductive adhesive, increasing the conductive area, improving the transmission efficiency, and at the same time achieving the effect of rapid heat dissipation.

[0034] Preferably, one end of the positive current collector 3 is also provided with a positive input port 301, wherein a fuse 6 is provided between the positive current collector 3 and the positive input port 301. The module integrates the fuse 6, so when a single module fails, such as a short circuit, the fuse can trip, preventing a more serious failure risk to the entire circuit. For example, in a large-scale photovoltaic system, multiple modules can be used as backups; when a single module fails, its fuse trips, without affecting the performance of the entire photovoltaic system.

[0035] Preferably, the parallel combination of capacitor cells 2 is an aluminum electrolytic capacitor or a mixture of aluminum electrolytic capacitors and film capacitors connected in parallel. In relevant application circuits, the switching process of power devices is accompanied by voltage spikes. The film capacitors present in this module can effectively absorb these spikes, thereby reducing the damage of the spikes generated during the switching process of power devices to the aluminum electrolytic capacitors in the module. This effectively filters out voltage spikes, improving stability and applicability.

[0036] It should be emphasized that the embodiments described in this utility model are illustrative rather than limiting. Therefore, this utility model is not limited to the embodiments described in the specific implementation. Any other implementation methods derived by those skilled in the art based on the technical solutions of this utility model are also within the scope of protection of this utility model.

Claims

1. An integrated super-energy storage module, characterized in that: The device includes a housing (1) and capacitor cells (2). The housing (1) has a cavity (101). Several capacitor cells (2) are installed in the cavity (101). A positive current collector (3) and a negative current collector (4) are provided on the side of the lead of the capacitor cell (2) for current collection. The positive lead (201) of the capacitor cell (2) is connected in parallel with the positive current collector (3). The negative lead (202) of the capacitor cell (2) is connected in parallel with the negative current collector (4). One end of the positive current collector (3) is provided with a positive output port (302), which protrudes from the housing (1) and is exposed. One end of the negative current collector (4) is provided with a negative output port (402), which protrudes from the housing (1) and is exposed.

2. The integrated super-energy storage module according to claim 1, characterized in that: The positive current collector (3) and the negative current collector (4) are stacked on top of each other, and an insulating partition (5) for isolating the positive and negative electrodes is provided between the positive current collector (3) and the negative current collector (4).

3. The integrated super-energy storage module according to claim 1, characterized in that: The positive current collector (3) has a plurality of positive pin connection ports (303) spaced apart on its end face. The positive pin (201) of the capacitor cell (2) is fixed to the positive pin connection port (303) by threaded connection or welding. The negative current collector (4) has a plurality of negative pin connection ports (403) spaced apart on its end face. The negative pin (202) of the capacitor cell (2) is fixed by threaded connection or welding.

4. The integrated super-energy storage module according to claim 3, characterized in that: The negative current collector (4) end face is also provided with a clearance through hole (404) for the positive pin (201) to pass through, wherein the clearance through hole (404) is insulated from the positive pin (201).

5. An integrated super-energy storage module according to claim 1, characterized in that: The outer shell (1) has an adsorbent (7) for adsorbing liquid in its cavity (101).

6. The integrated super-energy storage module according to claim 1, characterized in that: The cavity (101) is filled with a filler (8) covering the capacitor cell (2) for heat conduction.

7. An integrated super-energy storage module according to claim 1, characterized in that: One end of the positive current collector (3) is also provided with a positive input port (301), wherein a fuse (6) is provided between the positive current collector (3) and the positive input port (301).

8. An integrated super-energy storage module according to claim 1, characterized in that: The negative electrode current collector (4) is provided with a negative electrode extension (401) on one side, and a negative electrode output port (402) is provided on the outside of the negative electrode extension (401).

9. An integrated super-energy storage module according to claim 1, characterized in that: The parallel combination of the capacitor cells (2) is an aluminum electrolytic capacitor or a mixture of aluminum electrolytic capacitor and film capacitor connected in parallel.

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