A capacitor busbar for a new energy battery and a forming method thereof

Abstract

The present invention provides a capacitor busbar of a new energy battery, including a positive busbar and a negative busbar, and a first installation groove is formed in the middle part of the negative busbar, and multiple capacitor elements can be installed, and multiple first welding parts are formed on the right side of the negative busbar, so that the capacitor element can be fixed in the first installation groove through the first welding part, thereby greatly facilitating the installation of the capacitor element. In addition, the first negative terminal and the first positive terminal are in the same direction, so that the cooperation between the first negative terminal and the first positive terminal is more convenient, and the fourth positive terminal and the fifth positive terminal are separately welded to the second mounting plate and the first mounting plate, respectively, thereby greatly simplifying the forming process of the positive busbar; in addition, by respectively wrapping the positive and negative terminals with insulating glue, the insulation and service life of the positive and negative terminals are greatly improved.

Description

Technical Field

[0001] The present invention relates to the field of new energy batteries, and in particular to a capacitor busbar of a new energy battery and a forming method thereof. Background Art

[0002] Capacitor busbar is also called laminated busbar, composite busbar, laminated busbar, laminated busbar, composite copper busbar, and is called LaminatedBusbar in English. It is a multi-layer composite structure connection bar, which can be regarded as the highway of the distribution system. Compared with the traditional, bulky, time-consuming and troublesome wiring method, the use of composite busbar can provide a modern, easy to design, fast to install and clearly structured distribution system.

[0003] In order to adapt the capacitor structure, the capacitor busbar structure in the prior art is complex and has various shapes, so as to ensure that the arrangement of the capacitor elements in the capacitor is optimal. Figure 1 The capacitor busbar structure shown is for Figure 1 The capacitor busbar structure shown also requires the design of a completely new processing technology to form the capacitor busbar. Summary of the invention

[0004] The purpose of the present invention is to provide a capacitor busbar of a new energy battery and a forming method thereof.

[0005] In order to achieve the above object, the present invention provides the following technical solutions:

[0006] A capacitor busbar of a new energy battery comprises a positive busbar and a negative busbar, wherein the positive busbar is arranged on the left side of the negative busbar, the positive busbar and the negative busbar are fixed together by cold pressing, a plurality of first negative terminals are formed on the left side of the negative busbar, a first mounting groove is formed in the middle part of the negative busbar, the first mounting groove is used to install a capacitor element, a plurality of first welding portions are formed on the right side of the negative busbar, the first welding portions are used to weld the capacitor element, a first negative busbar mounting plate is extended upward from the rear end of the right side of the negative busbar, a second negative terminal and a second welding portion are arranged on the first mounting plate of the negative busbar, a plurality of first positive terminals are formed on the upper side of the positive busbar to the left, and a plurality of third welding portions are provided on the positive busbar, The front end of the positive busbar is bent upward and extended to have a second mounting plate, a second positive terminal is welded on the top of the second mounting plate, a fourth welding portion is provided on the side of the second mounting plate, the rear end of the positive busbar is bent upward and extended to have a third positive terminal, a fifth welding portion is provided on the side of the third positive terminal, a first insulating film and a second insulating film are provided between the positive busbar and the negative busbar for insulation isolation, a fourth positive terminal is welded on the second mounting plate of the positive busbar corresponding to the first negative terminal, the positive busbar is also provided with a first mounting plate for the positive busbar, a fifth positive terminal is welded on the first mounting plate of the positive busbar corresponding to the first negative terminal, and the positive and negative terminals on the left sides of the positive busbar and the negative busbar are respectively wrapped with insulating glue.

[0007] Furthermore, a plurality of electrical performance avoidance holes are provided on the first mounting groove of the negative electrode busbar.

[0008] The processing methods of the capacitor busbar of the new energy battery are as follows:

[0009] Step 1: Laser cut the positive busbar and the negative busbar separately from the sheet;

[0010] Step 2: Polish the positive busbar and the negative busbar respectively;

[0011] Step 3: stack the positive busbar and the first insulating film together in sequence, and then hot-press the first insulating film on the positive busbar, and stack the negative busbar and the second insulating film together in sequence, and then hot-press the second insulating film on the negative busbar;

[0012] Step 4: stamping and bending the positive busbar and the negative busbar respectively, wherein the negative busbar is stamped and bent to form a first mounting groove for mounting the capacitor element; and the positive busbar is stamped and bent to form a third positive terminal, a second positive terminal, a second mounting plate and a first positive terminal;

[0013] Step 5: Assemble the above-formed positive busbar and negative busbar together;

[0014] Step 6: Continue to weld the fourth positive terminal and the fifth positive terminal to the second mounting plate and the first mounting plate of the positive busbar respectively;

[0015] Step 7: Wrap the positive and negative terminals of the positive busbar and the negative busbar on the left with insulating glue respectively;

[0016] Step 8: Weld the second positive terminal to the top of the second mounting plate;

[0017] Step 9: Finally, cold press the positive busbar and the negative busbar together with 3M glue to form a capacitor busbar;

[0018] Step 10: Test the electrical performance of the capacitor busbar;

[0019] Step 11: Conduct a full inspection of the capacitor busbar;

[0020] Step 12: Pack and store qualified capacitor busbars.

[0021] The beneficial effects of the present invention are:

[0022] The present invention includes a positive busbar and a negative busbar, and a first mounting groove is formed in the middle part of the negative busbar, and a plurality of first welding parts are formed on the right side of the negative busbar, so that the capacitor element can be fixed in the first mounting groove through the first welding part, thereby greatly facilitating the installation of the capacitor element. In addition, a plurality of first negative terminals are formed on the left side of the negative busbar, and a plurality of first positive terminals are formed on the upper side of the positive busbar to the left. By arranging the first negative terminal and the first positive terminal in the same direction, the coordination between the first negative terminal and the first positive terminal is more convenient. In addition, the fourth positive terminal and the fifth positive terminal are separately welded to the second mounting plate and the first mounting plate, respectively, thereby greatly simplifying the forming process of the positive busbar; in addition, by respectively wrapping the positive and negative terminals with insulating glue, the insulation and service life of the positive and negative terminals are greatly improved.

[0023] The beneficial effects of the processing method for the capacitor busbar of the new energy battery are as follows: the present invention first processes the corresponding positive busbar and negative busbar sheets according to the shapes that need to be bent of the positive busbar and the negative busbar, and the present invention adopts the laser blanking method to greatly improve the efficiency;

[0024] Then grind and polish the positive busbar and the negative busbar to remove the uneven and rough places at the cut edge, as well as the places with scratches and burrs; this can prevent the cut edge from being uneven during subsequent processing, thereby affecting the performance of the capacitor busbar;

[0025] Next, the prior art is to bend the positive busbar and the negative busbar first. Since the positive busbar and the negative busbar have been bent, they cannot be stacked, resulting in the insulation films having to be attached or hot-pressed one by one on the positive busbar. The present invention adopts a hot-pressing and laminating method to hot-press the first insulation film on the positive busbar. During hot pressing, the first insulation film is hot-pressed on multiple positive busbars at one time. The negative busbar is also operated in the same way. The insulation film is hot-pressed and then bent, thereby greatly improving the processing efficiency.

[0026] Furthermore, the present invention welds the fourth positive terminal and the fifth positive terminal to the second mounting plate and the first mounting plate of the positive busbar, respectively, thereby greatly simplifying the structure of the positive busbar and saving raw materials. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0028] Figure 1 It is a three-dimensional structural diagram of the capacitor busbar of the new energy battery of the present invention;

[0029] Figure 2 It is a three-dimensional structural diagram of the negative electrode busbar of the capacitor busbar of the new energy battery of the present invention;

[0030] Figure 3 It is a three-dimensional structural diagram of the positive electrode busbar of the capacitor busbar of the new energy battery of the present invention;

[0031] Figure 4 It is an exploded structural diagram of the capacitor busbar of the new energy battery of the present invention;

[0032] Figure 5 It is a forming flow chart of the capacitor busbar of the new energy battery of the present invention;

[0033] Figure 6a It is a forming flow chart of the capacitor busbar of the new energy battery of the present invention;

[0034] Figure 6b It is a forming flow chart of the capacitor busbar of the new energy battery of the present invention;

[0035] Description of the accompanying drawings:

[0036] 1. Capacitor busbar; 2. Negative busbar; 3. Positive busbar;

[0037] 21. first negative terminal; 22. first mounting groove; 23. first welding portion; 24. first mounting plate of negative busbar; 25. second negative terminal; 26. second welding portion;

[0038] 31. first positive terminal; 32. third welding portion; 33. second mounting plate; 34. second positive terminal; 36. third positive terminal; 37. fifth welding portion; 38. fourth positive terminal; 39. fifth positive terminal;

[0039] 4. First insulating film; 5. Second insulating film; 6. Insulating glue wrap; DETAILED DESCRIPTION

[0040] In order to enable those skilled in the art to better understand the technical solution of the present invention, the present invention will be described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0041] A plurality of capacitor elements are usually connected in parallel in a capacitor to increase the capacity. The connection medium used by the capacitor element is a plurality of strands of electronic wire or copper foil. Due to the limitation of the internal space and structure, the connection medium and the capacitor element cannot fully contact each other, and the contact area is small, which leads to a weaker current carrying capacity of the capacitor. The capacitor busbar 1 can replace the connection medium, thereby increasing the contact area between the busbar and the capacitor element, thereby improving the current carrying capacity of the capacitor. In addition, due to the existence of the gap, the heat dissipation capacity of the capacitor can also be improved.

[0042] like Figure 1 As shown, a capacitor busbar 1 of a new energy battery includes a positive busbar 3 and a negative busbar 2. The positive busbar 3 is arranged on the left side of the negative busbar 2. The positive busbar 3 and the negative busbar 2 are fixed together by cold pressing with 3M glue. First, adhesive glue is applied on the butt joint surface of the negative busbar 2 and the positive busbar 3, and then bonding is performed. The bonded negative busbar 2 and the positive busbar 3 are pressed together by a cold press machine, thereby ensuring the reliability of the bonding of the negative busbar 2 and the positive busbar 3, and avoiding the appearance of gaps on the bonding surface of the negative busbar 2 and the positive busbar 3.

[0043] The present invention arranges the capacitor busbar 1 in a split type, thereby solving the problem that the capacitor busbar 1 with a complex polygon is inconvenient to process, realizing batch production, and greatly shortening the production cycle of the capacitor busbar 1.

[0044] like Figure 2As shown, a plurality of first negative terminals 21 are formed on the left side of the negative busbar 2, a first mounting groove 22 is formed in the middle portion of the negative busbar 2, the first mounting groove 22 is used to install the capacitor element, a plurality of first welding portions 23 are formed on the right side of the negative busbar 2, the first welding portions 23 are used to weld and fix the capacitor element, a first negative busbar mounting plate 24 is extended upward from the rear end of the right side of the negative busbar 2, and a second negative terminal 25 and a second welding portion 26 are arranged on the first negative busbar mounting plate 24.

[0045] like Figure 3 As shown, a plurality of first positive terminals 31 are formed on the upper side of the positive busbar 3 to the left, a plurality of third welding portions 32 are provided on the positive busbar 3, a second mounting plate 33 is bent upward and extended at the front end of the positive busbar 3, a second positive terminal 34 is welded on the top of the second mounting plate 33, a fourth welding portion is provided on the side of the second mounting plate 33, a third positive terminal 36 is bent upward and extended at the rear end of the positive busbar 3, and a fifth welding portion 37 is provided on the side of the third positive terminal 36.

[0046] like Figure 4 As shown, a first insulating film 4 and a second insulating film 5 are provided between the positive busbar 3 and the negative busbar 2 for insulation isolation. The first insulating film 4 is attached to the positive busbar 3, and the second insulating film 5 is attached to the negative busbar 2. The thickness of the first insulating film 4 and the second insulating film 5 is 0.20 mm to 0.30 mm, and particularly preferably 0.23 mm to 0.27 mm, wherein the optimal thickness is 0.25 mm. If the thickness of the first insulating film 4 and the second insulating film 5 is greater than 0.3 mm, the higher the voltage is borne. Conversely, if the thickness of the first insulating film 4 and the second insulating film 5 is less than 0.2 mm, the lower the voltage is borne. The thickness of the insulating film of the capacitor busbar 1 of the present invention is set at 0.20 mm to 0.30 mm, which can optimize the voltage it withstands.

[0047] The second mounting plate 33 of the positive busbar 3 is welded with a fourth positive terminal 38 corresponding to the first negative terminal 21, and the first mounting plate of the positive busbar is welded with a fifth positive terminal 39 corresponding to the first negative terminal 21. The positive and negative terminals of the positive busbar 3 and the negative busbar 2 on the left are respectively wrapped with insulating glue 6.

[0048] A first insulating film 4 and a second insulating film 5 are further provided between the positive busbar 3 and the negative busbar 2 for insulation isolation, which can reduce the self-inductance effect generated by the self-inductance and make the output current more uniform.

[0049] Specifically, a plurality of electrical performance avoidance holes are provided on the first installation groove 22 of the negative electrode busbar 2 .

[0050] A first mounting groove 22 is formed in the middle portion of the negative busbar 2, and a plurality of electrical performance avoidance holes are opened in the first mounting groove 22. The battery cell components are accommodated in the first mounting groove 22. The electrical performance avoidance holes increase the creepage distance between the two capacitor components, thereby preventing the insulating materials around the battery cell components from being polarized and causing the insulating materials to be charged.

[0051] The present invention includes a positive busbar 3 and a negative busbar 2, and a first mounting groove 22 is formed in the middle part of the negative busbar 2, and a plurality of first welding portions 23 are formed on the right side of the negative busbar 2, so that the capacitor element can be fixed in the first mounting groove 22 through the first welding portion 23, thereby greatly facilitating the installation of the capacitor element. In addition, a plurality of first negative terminals 21 are formed on the left side of the negative busbar 2, and a plurality of first positive terminals 31 are formed to the left of the upper side of the positive busbar 3. By arranging the first negative terminal 21 and the first positive terminal 31 in the same direction, the first negative terminal 21 and the first positive terminal 31 are more convenient to match. In addition, the fourth positive terminal 38 and the fifth positive terminal 39 are separately welded to the second mounting plate 33 and the first mounting plate of the positive busbar, thereby greatly simplifying the molding process of the positive busbar 3; in addition, by respectively wrapping the positive and negative terminals with insulating glue 6, the insulation and service life of the positive and negative terminals are greatly improved.

[0052] like Figure 5 , Figure 6a , Figure 6b As shown, the processing method of the capacitor busbar 1 of the new energy battery is as follows:

[0053] Step 1: Laser cut the positive busbar 3 and the negative busbar 2 separately from the sheet;

[0054] Step 2: polishing the positive busbar 3 and the negative busbar 2 respectively;

[0055] Step 3: The positive busbar 3 and the first insulating film 4 are sequentially stacked together, and then the first insulating film 4 is hot-pressed on the positive busbar 3, while the negative busbar 2 and the second insulating film 5 are sequentially stacked together, and then the second insulating film 5 is hot-pressed on the negative busbar 2;

[0056] Step 4: stamping and bending the positive busbar 3 and the negative busbar 2 respectively, wherein the negative busbar 2 is stamped and bent to form a first mounting groove 22 for mounting the capacitor element; and the positive busbar 3 is stamped and bent to form a third positive terminal 36, a second positive terminal 34, a second mounting plate 33 and a first positive terminal 31;

[0057] Step 5: Assemble the above-formed positive electrode busbar 3 and negative electrode busbar 2 together;

[0058] Step 6: Continue to weld the fourth positive terminal 38 and the fifth positive terminal 39 to the second mounting plate 33 of the positive busbar 3 and the first mounting plate of the positive busbar respectively;

[0059] Step 7: Wrap the positive and negative terminals of the positive busbar 3 and the negative busbar 2 on the left side with insulating glue 6 respectively;

[0060] Step 8: Weld the second positive terminal 34 to the top of the second mounting plate 33;

[0061] Step 9: Finally, cold press the positive busbar 3 and the negative busbar 2 together with 3M glue to form a capacitor busbar 1;

[0062] Step 10: Test the electrical performance of capacitor busbar 1;

[0063] Step 11: Perform a full inspection on capacitor busbar 1;

[0064] Step 12: Pack and store the qualified capacitor busbars 1.

[0065] The beneficial effects of the processing method for the capacitor busbar 1 of the new energy battery are as follows: the present invention first processes the corresponding positive busbar 3 and negative busbar 2 sheets according to the shapes that need to be bent of the positive busbar 3 and the negative busbar 2, and the present invention adopts the laser blanking method to greatly improve the efficiency;

[0066] Then, the positive busbar 3 and the negative busbar 2 are polished to remove uneven and rough areas at the cut ends, as well as areas with scratches and burrs; this can prevent the cut ends from being uneven during subsequent processing, thereby affecting the performance of the capacitor busbar 1;

[0067] Next, the prior art is to bend the positive busbar 3 and the negative busbar 2 first. Since the positive busbar 3 and the negative busbar 2 have been bent, they cannot be stacked, resulting in the insulation films being attached or hot pressed one by one on the positive busbar 3. The present invention adopts a hot pressing and laminating method to hot press the first insulation film 4 on the positive busbar 3. During hot pressing, the first insulation film 4 is hot pressed on multiple positive busbars 3 at one time. The negative busbar 2 is also operated last time, and the insulation film is hot pressed and then bent, thereby greatly improving the processing efficiency;

[0068] Furthermore, the present invention welds the fourth positive terminal 38 and the fifth positive terminal 39 to the second mounting plate 33 and the first mounting plate of the positive busbar 3, respectively, thereby greatly simplifying the structure of the positive busbar 3 and saving raw materials.

[0069] The above description of the disclosed embodiments enables one skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to one skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but rather to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A capacitor busbar for a new energy battery, characterized in that: It includes a positive busbar and a negative busbar, the positive busbar is arranged on the left side of the negative busbar, the positive busbar and the negative busbar are fixed together by cold pressing, a plurality of first negative terminals are formed on the left side of the negative busbar, a first mounting groove is formed in the middle part of the negative busbar, the first mounting groove is used to install a capacitor element, a plurality of first welding portions are formed on the right side of the negative busbar, the first welding portion is used to weld the capacitor element, a first mounting plate of the negative busbar is extended upward from the rear end of the right side of the negative busbar, a second negative terminal and a second welding portion are arranged on the first mounting plate of the negative busbar, a plurality of first positive terminals are formed to the left on the upper side of the positive busbar, a plurality of third welding portions are opened on the positive busbar, a second mounting plate is extended upward from the front end of the positive busbar, and a second mounting plate is welded on the top of the second mounting plate A second positive terminal is connected, a fourth welding portion is provided on the side of the second mounting plate, the rear end of the positive busbar is bent upward to extend a third positive terminal, a fifth welding portion is provided on the side of the third positive terminal, and a first insulating film and a second insulating film are provided between the positive busbar and the negative busbar for insulation isolation, the second mounting plate of the positive busbar is welded with a fourth positive terminal corresponding to the first negative terminal, the positive busbar is also provided with a first mounting plate of the positive busbar, the first mounting plate of the positive busbar includes the third positive terminal and the fifth welding portion, the first mounting plate of the positive busbar is welded with a fifth positive terminal corresponding to the first negative terminal, the positive and negative terminals of the positive busbar and the negative busbar on the left are respectively wrapped with insulating glue, and the thickness of the first insulating film is 0.20mm~0.30mm.

2. The capacitor busbar of a new energy battery according to claim 1, characterized in that: The first mounting groove of the negative busbar is provided with a plurality of electrical performance avoidance holes.

3. The capacitor busbar of the new energy battery according to any one of claims 1 to 2, characterized in that: The corresponding processing methods are as follows: Step 1: Laser cut the positive busbar and the negative busbar separately from the sheet; Step 2: Polish the positive busbar and the negative busbar respectively; Step 3: stack the positive busbar and the first insulating film together in sequence, and then hot-press the first insulating film on the positive busbar, and stack the negative busbar and the second insulating film together in sequence, and then hot-press the second insulating film on the negative busbar; Step 4: stamping and bending the positive busbar and the negative busbar respectively, wherein the negative busbar is stamped and bent to form a first mounting groove for mounting the capacitor element; and the positive busbar is stamped and bent to form a third positive terminal, a second positive terminal, a second mounting plate and a first positive terminal; Step 5: Assemble the above-formed positive busbar and negative busbar together; Step 6: Continue to weld the fourth positive terminal and the fifth positive terminal to the second mounting plate and the first mounting plate of the positive busbar respectively; Step 7: Wrap the positive and negative terminals of the positive busbar and the negative busbar on the left with insulating glue respectively; Step 8: Weld the second positive terminal to the top of the second mounting plate; Step 9: Finally, cold press the positive busbar and the negative busbar together with 3M glue to form a capacitor busbar; Step 10: Test the electrical performance of the capacitor busbar; Step 11: Conduct a full inspection of the capacitor busbar; Step 12: Pack and store qualified capacitor busbars.

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