Thin film capacitor for direct current filtering of charging pile

Abstract

The utility model relates to the technical field of capacitors, in particular to a thin film capacitor for direct current filtering of a charging pile, which comprises a shell, a sealing cover packaged on the shell, a battery cell arranged in the shell, an electrode column led out from the battery cell, a central fillet and two positioning fillets integrally formed in the shell, the two positioning fillets are symmetrically arranged, and a positioning channel is formed between the two positioning fillets; the sealing cover is provided with a through hole for the pole to penetrate through, a positioning guide column is fixedly arranged at the bottom of the sealing cover, a positioning convex block is fixedly arranged on the outer wall, close to the bottom, of the battery cell, and the positioning guide column and the positioning convex block are inserted into the positioning channel; according to the thin film capacitor for charging pile direct current filtering, the positioning guide columns and the positioning protruding blocks can be inserted into the positioning channels formed between the positioning fillets, so that the installation of the battery cell and the sealing cover has a positioning function, the precision of equipment for installing the battery cell and the sealing cover is reduced, and then the production cost can be reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of capacitors, in particular to a film capacitor for DC filtering of a charging pile. Background Technique

[0002] The DC charging pile rectifies the alternating current of the power grid to convert it into direct current, and then directly sends the direct current into the electric vehicle battery. The current pulsation and voltage fluctuation generated in this process may have a negative impact on the charging efficiency and safety of the battery. Therefore, in the design of the charging pile, effective filtering measures are crucial. The film capacitor is widely used in DC filtering of the charging pile due to its excellent electrical performance and good stability. However, during mass production of the existing film capacitors, due to the lack of positioning of the battery core, the battery core is prone to skew after being installed in the shell, which affects the installation of the subsequent cover. Also, there is a lack of positioning for the installation of the cover, resulting in the need for high-precision equipment for cover installation and increasing the production cost. Content of the Utility Model

[0003] Aiming at the deficiencies of the prior art, the utility model provides a film capacitor for DC filtering of a charging pile, which solves the technical problem of the lack of positioning in the installation of the battery core and the cover.

[0004] To solve the above technical problems, the utility model provides the following technical solution: A film capacitor for DC filtering of a charging pile includes a shell, a cover is encapsulated on the shell, a battery core is placed in the shell, and an electrode post is led out from the battery core. A central rib and positioning ribs are integrally formed in the shell. The number of the positioning ribs is two, and the two positioning ribs are symmetrically arranged. A positioning channel is formed between the two positioning ribs;

[0005] A perforation for the electrode post to pass through is provided on the cover. A positioning guide post is fixedly provided at the bottom of the cover. A positioning convex block is fixedly provided on the outer wall of the battery core near the bottom. The positioning guide post and the positioning convex block are both inserted into the positioning channel.

[0006] Preferably, a strip groove for increasing the outer surface area is provided on the outer wall of the shell.

[0007] Preferably, the number of the central ribs is at least three.

[0008] Preferably, a gap is left between the central rib and the inner bottom wall of the shell.

[0009] Preferably, an inclined surface is provided at the top of the central rib.

[0010] Preferably, the tops of the two positioning ribs are in a flared shape.

[0011] Preferably, a color-changing piece is attached to the bottom of the shell.

[0012] Preferably, the electrode post is in the shape of a circular thin strip or a sheet.

[0013] By means of the above technical solution, the present utility model provides a film capacitor for DC filtering of a charging pile, which has at least the following beneficial effects:

[0014] 1. For the film capacitor for DC filtering of a charging pile, by providing a central rib, a positioning rib, a positioning guide post and a positioning bump, the central rib can ensure that the battery core will not be skewed after installation, without affecting the installation of the subsequent cover. Moreover, under the action of the positioning guide post and the positioning bump, both the positioning guide post and the positioning bump can be inserted into the positioning channel formed between the positioning ribs, enabling the installation of the battery core and the cover to have a positioning function, reducing the equipment precision for installing the battery core and the cover, and thus reducing the production cost.

[0015] 2. For the film capacitor for DC filtering of a charging pile, by providing a color-changing sheet, after the working temperature of the film capacitor is exceeded, the color-changing sheet changes color, which can provide a clear visual signal for the maintenance staff, reducing the probability of misjudgment during the maintenance process, and ensuring that the staff does not need to rely on personal judgment in case of overheating. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The drawings described herein are used to provide a further understanding of the present utility model and form a part of this application:

[0017] Figure 1 It is a three-dimensional structural schematic diagram of the whole of the present utility model;

[0018] Figure 2 It is a structural schematic diagram of the bottom of the housing of the present utility model;

[0019] Figure 3 It is a structural schematic diagram of the inside of the housing of the present utility model;

[0020] Figure 4 It is a structural schematic diagram of the internal cross-section of the housing of the present utility model;

[0021] Figure 5 It is a structural schematic diagram of the whole of the present utility model after being disassembled;

[0022] Figure 6 It is a structural schematic diagram of the electrode post of the present utility model being in the shape of a sheet.

[0023] REFERENCE MARKS:

[0024] 1. Housing; 11. Central rib; 12. Positioning rib; 2. Cover; 21. Positioning guide post; 3. Battery core; 31. Positioning bump; 4. Electrode post; 5. Color-changing sheet. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0025] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts shall fall within the protection scope of the present utility model.

[0026] With the increasing global attention to sustainable transportation, electric vehicles (EVs) have rapidly gained popularity. As a key infrastructure for EV charging, the technological development and performance optimization of charging piles are crucial factors driving the growth of the EV market. DC charging piles have received extensive attention due to their fast charging speed and high efficiency. The application of thin film capacitors in DC filtering of charging piles not only solves the problems of high-frequency noise and pulsed current but also promotes the progress of EV charging technology. With the continuous development of technology, the performance and reliability of thin film capacitors will be further improved, contributing to the popularization of EVs and the development of sustainable transportation.

[0027] Embodiment 1:

[0028] Based on the technical defect of the lack of positioning in the installation of the battery cell 3 and the cover 2 in the existing technology, please refer to Figures 1-6 A thin film capacitor for DC filtering of a charging pile provided by the present utility model. Under the action of the positioning guide posts 21 and the positioning bumps 31, both the positioning guide posts 21 and the positioning bumps 31 can be inserted into the positioning channels formed between the positioning ribs 12, enabling the installation of the battery cell 3 and the cover 2 to have a positioning function, reducing the equipment accuracy for installing the battery cell 3 and the cover 2, and thus reducing the production cost. The thin film capacitor includes a housing 1, a cover 2 is encapsulated on the housing 1, a battery cell 3 is placed inside the housing 1, electrode posts 4 are led out from the battery cell 3, a central rib 11 and positioning ribs 12 are integrally formed inside the housing 1, the number of the positioning ribs 12 is two, and the two positioning ribs 12 are symmetrically arranged, and a positioning channel is formed between the two positioning ribs 12; the use of the central rib 11 can ensure that the battery cell 3 will not be skewed after installation, without affecting the subsequent installation of the cover 2, and by setting the positioning ribs 12, a positioning effect can be provided for the subsequent installation of the battery cell 3 and the cover 2.

[0029] To achieve the installation positioning of the battery cell 3 and the cover 2, a through hole for the electrode post 4 to penetrate is provided on the cover 2, a positioning guide post 21 is fixedly provided at the bottom of the cover 2, and a positioning bump 31 is fixedly provided on the outer wall of the battery cell 3 near the bottom. Both the positioning guide post 21 and the positioning bump 31 are inserted into the positioning channel; under the action of the positioning guide post 21 and the positioning bump 31, both the positioning guide post 21 and the positioning bump 31 can be inserted into the positioning channels formed between the positioning ribs 12, enabling the installation of the battery cell 3 and the cover 2 to have a positioning function.

[0030] To ensure the stable operation of the thin-film capacitor, strip grooves for increasing the outer surface area are provided on the outer wall of the housing 1; the strip grooves are used to increase the outer surface area of the housing 1, thereby facilitating rapid heat dissipation.

[0031] To prevent the core 3 from being installed obliquely, the number of the central ribs 11 is at least three; the central ribs 11 can be used to ensure that the core 3 will not be installed obliquely after installation.

[0032] To ensure more complete resin filling, a gap is left between the central rib 11 and the inner bottom wall of the housing 1; when filling the resin, the resin solution can flow through the gap to ensure that the resin can fill the entire interior of the housing 1.

[0033] To reduce the installation difficulty of the core 3, an inclined surface is provided at the top of the central rib 11; under the action of the inclined surface, the core 3 can automatically slide to the center position of the housing 1 during installation, achieving accurate installation position of the core 3.

[0034] To facilitate the insertion of the positioning posts 21 and the positioning bumps 31, the tops of the two positioning ribs 12 are in a flared shape; in this way, the positioning posts 21 and the positioning bumps 31 can automatically slide along the tops of the positioning ribs 12 into the positioning channels, achieving accurate installation positions of the core 3 and the cover 2.

[0035] To facilitate subsequent maintenance, a color-changing sheet 5 is attached to the bottom of the housing 1; the color-changing sheet 5 can provide clear visual signals for the staff during maintenance, reducing the probability of misjudgment during the maintenance process, and ensuring that the staff does not need to rely on personal judgment in case of overheating.

[0036] The electrode post 4 is in the shape of a circular thin strip or a sheet.

[0037] As can be seen from the above embodiments: when producing the thin-film capacitor, first under the action of the central rib 11, the core 3 is vertically installed in the housing 1. At the same time, under the action of the positioning bump 31, the positioning bump 31 can be inserted into the positioning channel formed between the positioning ribs 12 to achieve the positioning installation of the core 3. Then when installing the cover 2, the positioning posts 21 at the bottom of the cover 2 can be inserted into the positioning channel formed between the positioning ribs 12 to achieve the positioning installation of the cover 2.

[0038] It should be noted that the term "comprising", "including" or any other variant thereof is intended to cover non-exclusive inclusion, so that a process, method, article or device comprising a series of elements not only includes those elements, but also includes other elements not expressly listed, or elements inherent to such process, method, article or device.

[0039] Although embodiments of the present utility model have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principle and spirit of the present utility model. The scope of the present utility model is defined by the appended claims and their equivalents.

Claims

1. A film capacitor for DC filtering of a charging pile, comprising a housing (1), a cover (2) encapsulated on the housing (1), a battery core (3) placed in the housing (1), an electrode column (4) extending from the battery core (3), characterized in that: The housing (1) is integrally formed with a centering rib (11) and a positioning rib (12), the number of the positioning ribs (12) being two, and the two positioning ribs (12) being symmetrically arranged, and a positioning channel being formed between the two positioning ribs (12); The cover (2) is provided with a through hole for the electrode column (4) to pass through, a positioning guide column (21) is fixedly provided at the bottom of the cover (2), and a positioning protrusion (31) is fixedly provided on the outer wall of the battery cell (3) close to the bottom, and both the positioning guide column (21) and the positioning protrusion (31) are inserted into the positioning channel.

2. The film capacitor for DC filtering of a charging pile according to claim 1 is characterized in that: The outer wall of the shell (1) is provided with a strip groove for increasing the outer surface area.

3. The film capacitor for DC filtering of a charging pile according to claim 1 is characterized in that: The number of the central ribs (11) is at least three.

4. The film capacitor for DC filtering of a charging pile according to claim 1 is characterized in that: A gap is left between the central rib (11) and the inner bottom wall of the shell (1).

5. The film capacitor for DC filtering of a charging pile according to claim 1, characterized in that: The top of the central strip (11) is provided with an inclined surface.

6. The film capacitor for DC filtering of a charging pile according to claim 1, characterized in that: The tops of the two positioning ribs (12) are in a trumpet shape.

7. The film capacitor for DC filtering of a charging pile according to claim 1, characterized in that: The bottom of the housing (1) is covered with a color-changing sheet (5).

8. The film capacitor for DC filtering of a charging pile according to claim 1, characterized in that: The electrode column (4) is in the shape of a circular thin strip or a sheet.

Images