Multi-channel heavy-load capacitor and installation method thereof

Abstract

The multi-channel heavy-load capacitor comprises an end cover, a wiring assembly is arranged on the end cover, and the multi-channel heavy-load capacitor is characterized in that the wiring assembly comprises a binding post, a first capacitor, a second capacitor and a third capacitor; the binding post penetrates through the top of the electrode plate and is connected with the electrode plate to form a channel I, a bending part is further arranged at the bottom end of the electrode plate, and the bending part is connected with the bottom end of the binding post to form a channel II; the first channel and the second channel are connected in parallel. The bending part is arranged at the bottom end of the electrode plate and welded to the bottom end of the binding post, so that the binding post and the electrode plate form a plurality of parallel channels through which the current passes, and the total current I passing through the binding post and the electrode plate is divided into a plurality of parts by the plurality of channels, so that the current passing through the electrode plate is remarkably reduced; therefore, the phenomenon of serious heating of the electrode plate is obviously improved, and heat generated on the electrode plate is greatly reduced.

Description

Technical Field

[0001] The invention belongs to the technical field of capacitors, and in particular relates to a multi-channel large-load capacitor and a mounting method thereof. Background Art

[0002] In the structure of a capacitor, the connection between the terminal and the electrode sheet is an important part to ensure that the capacitor can work properly. The electrode sheet conducts current to the internal core, while the terminal is responsible for connecting the electrode sheet to the external circuit.

[0003] In the prior art, the connection between the upper terminal and the electrode sheet of the capacitor is as follows: Figure 1 , Figure 2 As shown, the terminal 10 passes through the electrode sheet 20 in the shape of a "7" and is connected to it. At this time, the direction of the current is as follows Figure 3 As shown, it is A1-A2-A3. In this combination, since the terminal 10 is thicker, its cross-sectional area is larger and the resistance is relatively small; while the electrode sheet 20 is thin, has a smaller cross-sectional area and a larger resistance. According to Joule's law, when the same current passes through conductors of different resistances, the part with larger resistance will generate more heat. Therefore, the electrode sheet 20 is more likely to accumulate heat when carrying current, resulting in serious heating. Summary of the invention

[0004] The present invention aims at solving the problems in the prior art and proposes the following technical solutions:

[0005] The present invention provides a multi-channel large load capacitor, comprising an end cap, on which a wiring assembly is arranged, characterized in that the wiring assembly comprises:

[0006] Terminals;

[0007] The electrode sheet, the terminal passes through the top of the electrode sheet and is connected to the electrode sheet to form a channel 1, and the bottom end of the electrode sheet is also provided with a bent portion, and the bent portion is connected to the bottom end of the terminal to form a channel 2;

[0008] The channel one is connected in parallel with the channel two.

[0009] As a preferred embodiment of the above technical solution, the total current of the channel formed by the terminal and the electrode sheet is equal to the sum of the currents of each channel.

[0010] As a preferred embodiment of the above technical solution, it also includes a nut which is detachably mounted on the terminal post, and the nut is located between the electrode sheet and the end cover. After the terminal post passes through the end cover, the nut fixes the terminal post and forms a gap between the electrode sheet and the end cover.

[0011] As a preferred embodiment of the above technical solution, the terminal includes a columnar body and a limiting portion arranged at the upper and lower parts, the limiting portion is located on the inner side of the end cover and cannot pass through the end cover, and the bent portion of the electrode sheet is connected to the bottom end of the limiting portion.

[0012] As a preferred embodiment of the above technical solution, the limiting portion forms a gap between the bending portion and the inner side wall of the end cover.

[0013] As a preferred embodiment of the above technical solution, the nut is threadably matched with the terminal post.

[0014] As a preferred embodiment of the above technical solution, the terminal and the electrode sheet are both inserted into the end cover, the connection between the top of the electrode sheet and the terminal is located on the outside of the end cover, and the connection between the bent portion and the bottom of the terminal is located on the inside of the end cover.

[0015] As a preferred embodiment of the above technical solution, the electrode sheet includes a mating segment 1 and a mating segment 2, the mating segment 1 is provided with a through hole for the column portion to pass through, the mating segment 2 passes through the end cover, and the bending portion is arranged on an end of the mating segment 2 away from the mating segment 1.

[0016] As a preferred embodiment of the above technical solution, a notch is further provided on the matching segment 2 of the electrode sheet, and the bending portion is formed by bending the matching segment 2 along the notch.

[0017] The present invention also provides a method for installing a multi-channel large-load capacitor, using any one of the multi-channel large-load capacitors described above, characterized in that it includes the following steps:

[0018] S1. Install the terminal: Put the inverted terminal onto the end cap from bottom to top;

[0019] S2. Install the nut: Screw the nut onto the terminal until the nut contacts the top end of the end cover and the terminal is fixed.

[0020] S3. Install the electrode sheet: put the top end of the electrode sheet on the terminal post and insert the other end into the inner side of the end cover;

[0021] S4, forming a bent portion: bending the bottom end of the electrode sheet along the notch to form a bent portion;

[0022] S5. Connect the bent portion and the terminal: weld the bent portion to the bottom end of the terminal.

[0023] The beneficial effects of the present invention are:

[0024] (1) The present invention provides a bent portion at the bottom end of the electrode sheet and welds the bent portion to the bottom end of the terminal, so that the terminal and the electrode sheet form multiple parallel channels for current to pass through. The multiple channels reduce the total current I passing through the terminal and the electrode sheet. 总It is divided into multiple parts, which significantly reduces the current passing through the electrode sheet, thereby significantly improving the serious heating of the electrode sheet and greatly reducing the heat generated on the electrode sheet.

[0025] (2) The present invention forms a gap D between the electrode sheet and the end cover by setting a nut, thereby allowing air to flow between the two. The flow of air can take away more heat, thereby improving the heat dissipation effect of the electrode sheet and further reducing the heat generated by the electrode sheet and the pole. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 The figure shows the schematic diagram of the matching between the pole and the electrode sheet in the background technology;

[0027] Figure 2 The figure shows a cross-sectional structure diagram of the electrode column and the electrode sheet in the background art;

[0028] Figure 3 What is shown is a schematic diagram of current flow in the background technology;

[0029] Figure 4 The diagram shows the electrode sheet before bending in the embodiment;

[0030] Figure 5 Shown is an overall schematic diagram of a capacitor in an embodiment;

[0031] Figure 6 The figure shows a cross-sectional structure diagram of the electrode column and the electrode sheet in the embodiment;

[0032] Figure 7 The diagram shows a schematic diagram of an electrode sheet after bending in an embodiment;

[0033] Figure 8 What is shown is a schematic diagram of current flow in an embodiment;

[0034] Figure numerals: 10, terminal; 11, column portion; 12, limiting portion; 20, electrode sheet; 21, matching section 1; 211, through hole; 22, matching section 2; 221, bending portion; 222, notch; 30, nut; 40, end cover. DETAILED DESCRIPTION

[0035] In order to make the purpose, technical solution and advantages of the embodiments of the present invention more clear, the technical solution of the present invention will be clearly and completely described below in conjunction with the embodiments.

[0036] Example

[0037] like Figure 6 , Figure 7 , Figure 8 As shown, Figure 6 The diagram shows a schematic diagram of an electrode sheet after bending in an embodiment; Figure 7 The figure shows a cross-sectional structure diagram of the electrode column and the electrode sheet in the embodiment; Figure 8 What is shown is a schematic diagram of current flow in an embodiment;

[0038] The device includes:

[0039] Terminal 10;

[0040] The electrode sheet 20, the terminal 10 passes through the top of the electrode sheet 20 and is connected to the electrode sheet 20 to form a connection point 1, and the bottom end of the electrode sheet 20 is also provided with a bent portion 221, and the bent portion 221 is connected to the bottom end of the terminal 10 to form a connection point 2;

[0041] The terminal 10 and the electrode sheet 20 form two parallel channels for current to pass through.

[0042] This embodiment improves the electrode sheet 20 in the shape of a letter "7" in the prior art. A bending portion 221 is provided at the bottom end of the electrode sheet 20, and the bending portion 221 is welded to the bottom end of the terminal 10. Figure 8 As shown, in this solution, the terminal 10 and the electrode sheet 20 form two parallel paths for current to pass through, namely B1-B2 and B1-C1-C2-B2.

[0043] This means that the total current I 总 Divided into several parts: I1, I 2… I n , and the total current of the channel formed by the terminal 10 and the electrode sheet 20 is equal to the sum of the currents of each channel, that is, I 总＝ I1+I 2+…+ I n .

[0044] according to When the length L of the terminal 10 and the electrode sheet 20 is constant and the resistivity ρ is constant, the resistance R of the electrode sheet 20 is greater than the resistance R of the terminal 10. Therefore, more current will pass through the path of the terminal 10, that is, B1-B2. Therefore, the current passing through the other path, that is, B1-C1-C2-B2, is smaller, that is, the current passing through the electrode sheet 20 will be significantly reduced. According to Joule's law, Q = I 2 RΔt, the heat is proportional to the square of the current. It can be seen that after the current passing through the electrode sheet 20 is significantly reduced, the heat generated on the electrode sheet 20 will also be significantly reduced, so the phenomenon of severe heating of the electrode sheet 20 can be significantly improved.

[0045] Furthermore, since the total current I is divided into two parts, the current passing through the terminal 10 is also reduced, thereby reducing the heat generated by the terminal 10 and the electrode sheet 20 .

[0046] Furthermore, welding the bent portion 221 of the electrode sheet 20 to the bottom end of the terminal 10 enhances the reliability of the electrical connection, improves the mechanical stability of the entire structure, and reduces the risk of loose connection due to vibration or external force.

[0047] like Figure 5 , Figure 6 As shown, Figure 5 Shown is an overall schematic diagram of a capacitor in an embodiment; Figure 6 The diagram shows a schematic diagram of an electrode sheet after bending in an embodiment;

[0048] It also includes an end cover 40, on which the terminal 10 and the electrode sheet 20 are both inserted, the connection between the top of the electrode sheet 20 and the terminal 10 is located on the outside of the end cover 40, and the connection between the bent portion 221 and the bottom of the terminal 10 is located on the inside of the end cover 40.

[0049] The end cap 40 is arranged on the top of the capacitor, and the terminal 10 and the electrode sheet 20 are arranged on the end cap 40. Specifically, the end cap 40 is provided with mounting holes for mounting each set of terminal 10 and electrode sheet 20 and matching their shapes.

[0050] like Figure 6 As shown, Figure 6 The diagram shows a schematic diagram of an electrode sheet after bending in an embodiment;

[0051] The terminal 10 includes a column portion 11 and a limiting portion 12 which are arranged at the upper and lower parts. The column portion 11 is inserted into the mounting hole opened in the end cover 40. The limiting portion 12 is located on the inner side of the end cover 40 and cannot pass through the mounting hole. The bending portion 221 of the electrode sheet 20 is connected to the bottom end of the limiting portion 12. The limiting portion 12 forms a gap E between the bending portion 221 and the inner wall of the end cover 40.

[0052] It also includes a nut 30 that is detachably mounted on the terminal post 10. The nut 30 is arranged on the outside of the end cover 40, and the nut 30 is located between the electrode sheet 20 and the end cover 40. After the terminal post 10 passes through the end cover 40, the nut 30 fixes it and forms a gap D between the electrode sheet 20 and the end cover 40.

[0053] The outer wall of the column part 11 is provided with a threaded section, and the nut 30 is threadably matched with the column part 11 .

[0054] Specifically, the terminal 10 is a bolt, and its limiting portion 12 is a bolt head. This structure can facilitate the positioning and installation of the terminal 10. During installation, the inverted terminal 10 is passed through the end cover 40 from bottom to top, and then the nut 30 is screwed on the outside of the column body 11 until the nut 30 is abutted against the top end surface of the end cover 40, thereby achieving the installation and fixation of the terminal 10.

[0055] The setting of gap D and gap E allows air to flow between the electrode sheet 20 and the end cover 40 . The flow of air can take away more heat, thereby improving the heat dissipation effect of the electrode sheet 20 and further reducing the heat generated by the electrode sheet 20 and the terminal 10 .

[0056] The electrode sheet 20 includes a first mating section 21 and a second mating section 22 . The first mating section 21 is provided with a through hole 211 for the column portion 11 to pass through. The second mating section 22 passes through the end cover 40 . The bending portion 221 is provided on one end of the second mating section 22 away from the first mating section 21 .

[0057] The through hole 211 provided on the mating section 1 21 facilitates the terminal 10 to pass through and be connected thereto, and also facilitates the assembly between the electrode sheet 20 and the terminal 10. Specifically, after the terminal 10 is fixed to the end cover 40 by the nut 30, one end of the electrode sheet 20 is directly sleeved on the terminal 10, and the other end is inserted into the inner side of the end cover 40.

[0058] like Figure 4 As shown, Figure 4 The diagram shows the electrode sheet before bending in the embodiment;

[0059] A notch 222 is further provided on the second matching section 22 of the electrode sheet 20 , and the bent portion 221 is formed by bending the second matching section 22 along the notch 222 .

[0060] The notch 222 facilitates the formation of the bent portion 221 . Specifically, one end of the electrode sheet 20 is sleeved on the terminal post 10 , and the other end is inserted into the inner side of the end cover 40 . The electrode sheet 20 is then bent along the notch 222 to form the bent portion 221 .

[0061] Example 2

[0062] The method for installing a multi-channel large-load capacitor, using the multi-channel large-load capacitor, comprises the following steps:

[0063] S1, installing the terminal 10: inserting the inverted terminal 10 onto the end cover 40 from bottom to top;

[0064] S2, installing the nut 30: screwing the nut 30 onto the terminal post 10 until the nut 30 abuts against the top end surface of the end cover 40, and the terminal post 10 is fixed;

[0065] S3, installing the electrode sheet 20: the top end of the electrode sheet 20 is sleeved on the terminal post 10, and the other end is inserted into the inner side of the end cover 40;

[0066] S4, forming a bent portion 221: bending the bottom end of the electrode sheet 20 along the notch 222 to form a bent portion 221;

[0067] S5, connecting the bent portion 221 and the terminal 10: welding the bent portion 221 and the bottom end of the terminal 10. The above embodiments are only used to illustrate the technical solution of the present invention, but not to limit it.

Claims

1. A multi-channel large load capacitor, comprising an end cap (40), wherein a wiring assembly is arranged on the end cap (40), characterized in that: Wiring kit includes: Terminal (10); An electrode sheet (20), wherein the terminal (10) passes through the top of the electrode sheet (20) and is connected to the electrode sheet (20) to form a first channel, and a bent portion (221) is further provided at the bottom end of the electrode sheet (20), and the bent portion (221) is connected to the bottom end of the terminal (10) to form a second channel; The channel one is connected in parallel with the channel two.

2. The multi-channel large load capacitor according to claim 1, characterized in that: The total current of the channel formed by the terminal post (10) and the electrode sheet (20) is equal to the sum of the currents of the channels.

3. The multi-channel large load capacitor according to claim 1, characterized in that: The invention also comprises a nut (30) which is detachably sleeved on the terminal post (10), the nut (30) being located between the electrode sheet (20) and the end cover (40), and the nut (30) fixing the terminal post (10) after the terminal post (10) passes through the end cover (40) and forming a gap between the electrode sheet (20) and the end cover (40).

4. The multi-channel large load capacitor according to claim 1, characterized in that: The terminal (10) comprises a column portion (11) and a limiting portion (12) arranged at the upper and lower parts, wherein the limiting portion (12) is located inside the end cover (40) and cannot pass through the end cover (40), and the bent portion (221) of the electrode sheet (20) is connected to the bottom end of the limiting portion (12).

5. The multi-channel large load capacitor according to claim 4, characterized in that: The limiting portion (12) forms a gap between the bent portion (221) and the inner side wall of the end cover (40).

6. The multi-channel large load capacitor according to claim 3, characterized in that: The nut (30) is threadably matched with the terminal post (10).

7. The multi-channel large load capacitor according to claim 1, characterized in that: The terminal (10) and the electrode sheet (20) are both inserted into the end cover (40); the connection between the top of the electrode sheet (20) and the terminal (10) is located on the outside of the end cover (40); and the connection between the bent portion (221) and the bottom of the terminal (10) is located on the inside of the end cover (40).

8. The multi-channel large load capacitor according to claim 1, characterized in that: The electrode sheet (20) comprises a first matching section (21) and a second matching section (22); the first matching section (21) is provided with a through hole (211) for the column portion (11) to pass through; the second matching section (22) passes through the end cover (40); and the bent portion (221) is arranged at an end of the second matching section (22) away from the first matching section (21).

9. The multi-channel large load capacitor according to claim 8, characterized in that: The second matching section (22) of the electrode sheet (20) is also provided with a notch (222), and the bent portion (221) is formed by bending the second matching section (22) along the notch (222).

10. A method for installing a multi-channel large load capacitor, using the multi-channel large load capacitor according to any one of claims 1 to 8, characterized in that: The following steps are involved: S1. Install the terminal post (10): insert the inverted terminal post (10) onto the end cover (40) from bottom to top; S2. Install the nut (30): screw the nut (30) onto the terminal post (10) until the nut (30) abuts against the top end surface of the end cover (40), and the terminal post (10) is fixed; S3, installing the electrode sheet (20): sleeve the top end of the electrode sheet (20) onto the terminal post (10), and insert the other end into the inner side of the end cover (40); S4, forming a bent portion (221): bending the bottom end of the electrode sheet (20) along the notch (222) to form a bent portion (221); S5. Connecting the bent portion (221) and the terminal (10): welding the bent portion (221) and the bottom end of the terminal (10).

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