Integrated busbar welding tool

Abstract

The utility model provides an integrated busbar welding tool, which is used for keeping the welding of relative positions between a busbar and an FPC (Flexible Printed Circuit) board, and comprises a carrier body provided with a first supporting surface and a second supporting surface which are perpendicular to each other; the first supporting surface bears the busbar and supports the busbar when the busbar is pressed by the upper cover pressing plate; the FPC board is attached to the second supporting surface; and the pressing part can be operated to be folded towards the second supporting surface so as to press the FPC board on the second supporting surface. According to the integrated busbar welding tool, fixing can be conducted from the two sides of the L-shaped external structure when the integrated busbar is assembled and welded, so that the integrated busbar is not prone to shaking when assembled and welded, the whole integrated busbar is not prone to deformation, the welding precision of the busbar is higher, and the welding quality of the integrated busbar is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of welding tooling, in particular to an integrated busbar welding tooling. Background Art

[0002] With the rapid development of new energy batteries and the continuous technological iteration, all related industries are pursuing higher energy density and lighter batteries. The integrated busbar (CCS, Cells Contact System) has gradually replaced the traditional wiring harness busbar with its good line sealing, high integration, high lightness and small size, and will become the mainstream configuration of batteries.

[0003] The integrated busbar is mainly composed of signal acquisition components, plastic structural parts, busbars, etc., which are connected into a whole through processes such as hot pressing or riveting to realize high-voltage series and parallel connection of battery cells, as well as temperature sampling and battery cell voltage sampling functions. It provides temperature and voltage to BMS (Battery Management System) through FPC (Flexible Printed Circuit) and connector components, and is part of the BMS system. During the production process, the manufacturing process of the integrated busbar is also extremely demanding. Among them, the welding of the FPC acquisition sheet and the busbar is a key link. In order to ensure the accuracy and stability of welding, it is usually used to position the four corners of the FPC, and then use the welding mold of the welding equipment to press it on the busbar for welding.

[0004] For some battery cells, such as blade battery cells, the positive and negative ears of the cells are placed on the side after being assembled into the battery module, and the space reserved for the integrated busbar installation in the battery module is limited. In order to adapt to this situation, the integrated busbar is set to an "L" shape, with an FPC board on one side and the busbar connected on the other side. However, when laser welding the busbar and the collection sheet, this type of integrated busbar is difficult to fix by only pressing the busbar and the collection sheet with the welding mold, which may cause deformation of the integrated busbar during welding, affecting the welding quality. Utility Model Content

[0005] In view of this, the utility model aims to provide an integrated busbar welding tool to improve the welding quality of the integrated busbar.

[0006] In order to achieve the above object, the technical solution of the utility model is implemented as follows:

[0007] An integrated busbar welding tool is used for welding and maintaining the relative position between the busbar and the FPC board, comprising:

[0008] The carrier body is provided with a first supporting surface and a second supporting surface perpendicular to each other; the first supporting surface carries the bus bar, constituting support for the bus bar when it is pressed by the upper cover pressure plate; the FPC board is attached to the second supporting surface;

[0009] The pressing portion can be operated to close toward the second supporting surface to form a pressing force on the FPC board on the second supporting surface.

[0010] Furthermore, at least two second supporting surfaces are provided, and each of the second supporting surfaces is equipped with one of the pressing portions.

[0011] Furthermore, one end of the clamping portion is hinged to the carrier body, and the free end of the clamping portion can rotate with the second supporting surface to clamp or release the FPC board.

[0012] Furthermore, the pressing portion is hingedly connected to the carrier body.

[0013] Furthermore, the FPC board is provided with a positioning hole; and the second supporting surface is provided with a positioning protrusion capable of passing through the positioning hole to constitute a limiting constraint on the FPC board.

[0014] Furthermore, a pad block that follows the shape of at least a portion of the busbar is provided on the first supporting surface to support and position the busbar.

[0015] Furthermore, a support block capable of abutting against the upper cover pressing plate is provided on the first support surface to limit the minimum distance between the upper cover pressing plate and the first support surface.

[0016] Furthermore, a positioning block is provided on the first supporting surface, and the positioning block is inserted into the bus bracket to limit the bus bracket.

[0017] Furthermore, a retaining assembly is provided between the carrier body and the pressing portion, and when the pressing portion presses the FPC board, the retaining assembly enables the pressing portion to hold the FPC board tightly.

[0018] Furthermore, the retaining assembly includes a first component and a second component, and when the pressing portion is closed toward the second supporting surface, the first component gradually approaches the second component to form a magnetic attraction fit.

[0019] Compared with the prior art, the utility model has the following advantages:

[0020] The first supporting surface of the integrated busbar welding tool described in the utility model can support the busbar, and clamp the busbar together with the upper cover pressure plate of the welding equipment to fix one side of the integrated busbar busbar; the clamping part and the second supporting surface jointly clamp the FPC board of the integrated busbar to fix one side of the FPC board of the integrated busbar; by using the welding tool of the utility model, the integrated busbar can be fixed from both sides of its "L"-shaped external structure during assembly and welding, so that the integrated busbar is not easy to shake during assembly and welding, and the integrated busbar as a whole is not easy to deform, the welding accuracy of the busbar is higher, and the welding quality of the integrated busbar is improved.

[0021] Two or more second supporting surfaces are arranged on the carrier body, and a clamping part is arranged in combination, so that multiple sets of integrated busbars can be clamped on the welding tooling at the same time, and these integrated busbars can be welded synchronously using welding equipment, thereby improving welding efficiency; secondly, only one carrier body is required to carry multiple sets of integrated busbars, which also saves the use of materials and reduces production costs.

[0022] The clamping part is hinged to the carrier body, and the FPC board can be clamped or released by rotating the clamping part, which is simple to operate and convenient to use.

[0023] Using hinges to connect the clamping part and the load body can make the clamping part smoother when rotating; secondly, even if the clamping part is rotated frequently, the hinge can still maintain its smooth opening and closing, is not easy to be damaged, and is more durable; thirdly, the manufacturing cost of the hinge is low, and using the hinge as a hinge can reduce the manufacturing cost of the welding tooling.

[0024] A positioning hole is pre-set on the FPC board, and a positioning protrusion is set on the second supporting surface. When clamping the FPC board, first align the positioning hole on the FPC board with the positioning protrusion to install the FPC board, and then use the clamping part to clamp the FPC board to complete the clamping and fixing.

[0025] A pad is arranged on the first supporting surface, and the pad follows the shape of part of the bus, so as to play a role in positioning and limiting the bus; secondly, when the upper cover pressure plate presses the bus, the connection between the bus and the pad is more firm and not easy to loosen or dislocate.

[0026] When the upper cover pressing plate presses the busbar against the first supporting surface, the support block can limit the upper cover pressing plate, so that the upper cover pressing plate is not easy to over-compress the busbar, and can play a certain protective role on the busbar.

[0027] The positioning block can clamp and limit the bus bracket, and play a certain role in positioning the bus position.

[0028] The retaining component can play a retaining role when the pressing part presses the FPC board, so that the pressing part firmly presses the FPC board and is not easy to loosen.

[0029] The first component and the second component are used in conjunction, so that after the pressing part moves close to the second supporting surface, the pressing part can press the FPC board by the magnetic attraction force; when separating the pressing part, it only needs to use force to move the pressing part away from the FPC board, which is easy to use. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] The accompanying drawings constituting a part of the present invention are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation on the present invention. In the accompanying drawings:

[0031] Figure 1 This is a schematic diagram of the overall structure of the welding tooling according to the embodiment of the utility model;

[0032] Figure 2 yes Figure 1 A partial enlarged view of the middle A part;

[0033] Figure 3 This is a schematic diagram of the welding tool and the upper cover pressure plate jointly fixing the integrated busbar in the embodiment of the utility model;

[0034] Figure 4 yes Figure 3 Exploded view of the welding fixture, upper cover plate and integrated busbar;

[0035] Figure 5 yes Figure 4 A partial enlarged view of part B in the middle.

[0036] Description of reference numerals:

[0037] 1. Load specific information;

[0038] 101, first supporting surface; 102, second supporting surface; 103, positioning protrusion; 104, cushion block; 105, supporting block; 106, positioning block;

[0039] 2. Pressing part;

[0040] 201, avoidance hole;

[0041] 3. Hinge;

[0042] 4. Maintain components;

[0043] 401, first component; 402, second component;

[0044] 5. Bus;

[0045] 6. FPC board;

[0046] 601, positioning hole;

[0047] 7. Collect the film;

[0048] 8. Busbar bracket;

[0049] 9. Upper cover pressure plate. DETAILED DESCRIPTION

[0050] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features in the embodiments can be combined with each other.

[0051] In the description of the present invention, it should be noted that if there are terms such as "upper", "lower", "inner", "outer" and the like indicating orientation or positional relationship, they are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, if there are terms such as "first" and "second", they are also used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0052] In addition, in the description of the present invention, unless otherwise clearly defined, the terms "installation", "connection", "connection" and "connector" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood in combination with specific circumstances.

[0053] The present invention will be described in detail below with reference to the accompanying drawings and in combination with embodiments.

[0054] The present embodiment relates to an integrated busbar welding tool for fixing an "L"-shaped structure integrated busbar, which has a better fixing effect when welding the busbar 5 and the collection sheet 7 and improves the welding quality.

[0055] In terms of overall structure, the integrated busbar welding tool of this embodiment is used for welding and maintaining the relative position between the busbar 5 and the FPC board 6, and includes:

[0056] The carrier body 1 is provided with a first supporting surface 101 and a second supporting surface 102 which are perpendicular to each other. The first supporting surface 101 carries the busbar 5 and provides support for the busbar 5 when it is pressed by the upper cover pressing plate 9. The FPC board 6 is against the second supporting surface 102.

[0057] The pressing portion 2 can be operated to close toward the second supporting surface 102 to press the FPC board 6 on the second supporting surface 102 .

[0058] As configured above, the first support surface 101 of the integrated busbar welding fixture described in this embodiment can support the busbar 5, and clamp the busbar 5 together with the upper cover pressure plate 9 of the welding equipment to fix one side of the integrated busbar busbar 5. The clamping portion 2 and the second support surface 102 clamp the FPC board 6 of the integrated busbar together to fix one side of the FPC board 6 of the integrated busbar. By using the welding fixture of this embodiment, the integrated busbar can be fixed from both sides of its "L"-shaped external structure during assembly and welding, so that the integrated busbar is not easy to shake during assembly and welding, and the integrated busbar is not easy to deform as a whole. The welding accuracy of the busbar 5 is higher, the welding quality of the integrated busbar is improved, and the production yield rate of the integrated busbar is improved.

[0059] Based on the above overall introduction, refer to Figure 1-Figure 5 Specifically, the welding tooling of this embodiment is used to clamp the semi-finished integrated busbar, that is, the integrated busbar when the busbar 5 and the collection piece 7 are not welded. In specific implementation, after the busbar 5 is accurately positioned and placed on the first support surface 101, the clamping part 2 and the second support surface 102 jointly clamp the FPC board 6, and the collection piece 7 fixedly connected to the FPC board 6 overlaps the busbar 5. After that, the upper pressure cover plate of the welding equipment is pressed down to press the busbar 5 and the collection piece 7 on the first support surface 101, and the position of the busbar 5 and the collection piece 7 is fixed. Through holes are provided on the upper pressure cover plate corresponding to the connection points of each busbar 5 and the collection piece 7. The welding equipment can perform laser welding on the collection piece 7 and the busbar 5 through the through holes. During the welding process, it is not easy for the collection piece 7 and the busbar 5 to be offset, thereby improving the welding quality.

[0060] There are usually multiple integrated busbars in a battery pack, so there is a large demand for integrated busbars in actual production. In order to improve the welding efficiency of the integrated busbar and speed up the overall production efficiency, at least two second support surfaces 102 are provided on the carrier body 1, and each second support surface 102 is equipped with a clamping portion 2. Two or more second support surfaces 102 are provided on the carrier body 1, and a clamping portion 2 is provided in combination, so that multiple sets of integrated busbars can be clamped on the welding tooling at the same time, and these integrated busbars can be welded synchronously using welding equipment, thereby improving welding efficiency. Secondly, only one carrier body 1 is required to carry multiple sets of integrated busbars, which also saves the use of materials and reduces production costs.

[0061] Specifically, refer to Figure 1 and Figure 3 In this embodiment, two second support surfaces 102 are mirror-imaged on the carrier body 1, and the two second support surfaces 102 are equipped with a pressing portion 2, and the carrier body 1 is in a long strip shape. In specific implementation, two sets of integrated busbars can be placed on one carrier body 1, and then the upper cover pressing plate 9 presses the two sets of busbars 5 at one time, and the welding equipment can also weld two integrated busbars at one time, which improves the welding efficiency.

[0062] It should be noted that more than two second support surfaces 102 may be provided on the carrier body 1. However, the integrated busbars provided on the same carrier body 1 must have their welding sides located on the first support surface 101. In this way, the volume of the carrier body 1 will be larger, resulting in a larger overall size and heavier weight of the welding tool, which is inconvenient for practical use and storage compared to the welding tool in this embodiment.

[0063] In order to simplify the clamping and releasing operation of the clamping part 2, one end of the clamping part 2 is hinged to the carrier body 1, and the free end of the clamping part 2 can rotate with the second supporting surface 102 to clamp or release the FPC board 6. The clamping part 2 is hinged to the carrier body 1, and the FPC board 6 can be clamped or released by rotating the clamping part 2, which is simple to operate and convenient to use.

[0064] Regarding the selection of the hinge structure, further, the clamping part 2 is connected to the carrier body 1 by a hinge 3. The use of the hinge 3 to connect the clamping part 2 and the carrier body 1 can make the clamping part 2 smoother when rotating. Secondly, even if the clamping part 2 is rotated frequently, the hinge 3 can still maintain its smooth opening and closing, is not easily damaged, and is more durable. Furthermore, the manufacturing cost of the hinge 3 is relatively low, and the use of the hinge 3 as a hinged part can reduce the manufacturing cost of the welding tooling. Of course, the hinge structure can also be in the form of a hinge, a pivot, etc.

[0065] Based on the need for the clamping part 2 to continuously clamp the FPC board 6, refer to Figure 1 and Figure 2 A holding component 4 is provided between the carrier body 1 and the pressing part 2. When the pressing part 2 presses the FPC board 6, the holding component 4 forms a pressing and holding function for the pressing part 2 to hold the FPC board 6. The holding component 4 can hold the FPC board 6 when the pressing part 2 presses the FPC board 6, so that the pressing part 2 can firmly press the FPC board 6 and prevent it from loosening.

[0066] Specifically, the holding assembly 4 includes a first component 401 and a second component 402. When the pressing part 2 is closed toward the second supporting surface 102, the first component 401 gradually approaches the second component 402 to form a magnetic attraction. The first component 401 and the second component 402 are used in combination, so that after the pressing part 2 moves close to the second supporting surface 102, the pressing part 2 can press the FPC board 6 by the action of the magnetic attraction. When separating the pressing part 2, it is only necessary to use force to move the pressing part 2 away from the FPC board 6, which is convenient to use.

[0067] It should be noted that, for the specific installation positions of the first component 401 and the second component 402, the first component 401 is embedded in the carrier body 1, and one end is flush with the second support surface 102; the second component 402 is embedded in the clamping part 2, and one end is flush with the side of the clamping part 2 that cooperates with the second support surface 102. When the clamping part 2 rotates until the first component 401 is close to the second component 402, the clamping part 2 can be pressed on the FPC board 6 due to the magnetic attraction effect of the first component 401 and the second component 402. Of course, the positions of the first component 401 and the second component 402 can also be interchanged. For the specific form selection of the first component 401 and the second component 402, in this embodiment, the first component 401 and the second component 402 are both magnets. When the clamping part 2 and the second support surface 102 jointly clamp the FPC board 6, the two opposite magnetic poles of the first component 401 and the second component 402 are opposite to each other, forming a magnetic attraction effect. Of course, the first component 401 and the second component 402 may also be a combination of a magnet and an iron block, which can also play a role of magnetic attraction. In this embodiment, three groups of holding components 4 are arranged between each second supporting surface 102 and the pressing portion 2.

[0068] In order to improve the position accuracy of the FPC board 6 on the second supporting surface 102, refer to Figure 4 and Figure 5 , a positioning hole 601 is provided on the FPC board 6, and a positioning protrusion 103 that can pass through the positioning hole 601 is provided on the second supporting surface 102 to constitute a limit constraint on the FPC board 6. The positioning hole 601 is pre-set on the FPC board 6, and the positioning protrusion 103 is set on the second supporting surface 102. When clamping the FPC board 6, first align the positioning hole 601 on the FPC board 6 with the positioning protrusion 103 to install the FPC board 6, and then use the clamping part 2 to clamp the FPC board 6 to complete the clamping and fixing. Correspondingly, an avoidance hole 201 is provided on the side surface of the clamping part 2 that contacts the FPC board 6. After the clamping part 2 clamps the FPC board 6, the positioning protrusion 103 is passed through the avoidance hole 201, which does not affect the use of the clamping part 2.

[0069] Specifically, the positioning protrusions 103 are cylindrical, and four are provided along the length direction on each second supporting surface 102. A positioning hole 601 is provided on each FPC board 6 corresponding to the positioning protrusions 103, wherein one positioning hole 601 at one end is a circular hole, and the rest are elongated holes. When installing the FPC board 6, the first circular positioning hole 601 is first fitted with the positioning protrusion 103, and then the rest of the positioning protrusions 103 are inserted into the positioning holes 601. The elongated holes can absorb the spacing tolerance of the positioning protrusions 103 in the length direction of the second supporting surface 102.

[0070] Based on the requirement for the placement accuracy of bus 5, refer to Figure 1 and Figure 4, a pad 104 that follows the shape of at least part of the bus 5 is provided on the first support surface 101 to support and position the bus 5. The pad 104 is provided on the first support surface 101, and the pad 104 follows the shape of part of the bus 5, so as to position and limit the bus 5. Secondly, when the upper cover pressing plate 9 presses the bus 5, the connection between the bus 5 and the pad 104 is also more firm and not easy to loosen or misalign.

[0071] Further, see Figure 4 and Figure 5 When the busbar 5 is welded to the collection sheet 7, the busbar 5 has been fixed on the busbar bracket 8. In order to improve the stability of the first busbar 5 on the first support surface 101, a positioning block 106 is provided on the first support surface 101. The positioning block 106 is inserted into the busbar bracket 8 to limit the position of the busbar bracket 8. The positioning block 106 can clamp and limit the busbar bracket 8, and play a certain role in positioning the position of the busbar 5.

[0072] If the upper cover pressing plate 9 applies too much pressure when pressing the busbar 5, the busbar 5 and related parts may be damaged. Figure 1 and Figure 3 , a support block 105 capable of abutting the upper cover pressing plate 9 is provided on the first support surface 101 to limit the minimum distance between the upper cover pressing plate 9 and the first support surface 101. When the upper cover pressing plate 9 presses the bus 5 against the first support surface 101, the support block 105 can limit the upper cover pressing plate 9, so that the upper cover pressing plate 9 is not easy to over-extrude the bus 5, and can play a certain protective role on the bus 5. In this embodiment, two support blocks 105 are provided, which are respectively located at the two ends of the length direction of the first support surface 101 and are bolted to the carrier body 1.

[0073] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. An integrated busbar welding tool, used for welding and maintaining the relative position between the busbar and the FPC board, characterized in that: include: The carrier body is provided with a first supporting surface and a second supporting surface perpendicular to each other; the first supporting surface carries the bus bar, constituting support for the bus bar when it is pressed by the upper cover pressure plate; the FPC board is attached to the second supporting surface; The pressing portion can be operated to close toward the second supporting surface to form a pressing force on the FPC board on the second supporting surface.

2. The integrated busbar welding tool according to claim 1 is characterized in that: At least two second supporting surfaces are provided, and each of the second supporting surfaces is equipped with one of the pressing portions.

3. The integrated busbar welding tool according to claim 1 is characterized in that: One end of the clamping portion is hinged to the carrier body, and the free end of the clamping portion can rotate with the second supporting surface to clamp or release the FPC board.

4. The integrated busbar welding tool according to claim 3 is characterized in that: The pressing part is hingedly connected to the carrier body.

5. The integrated busbar welding tool according to claim 1, characterized in that: The FPC board is provided with a positioning hole; the second supporting surface is provided with a positioning protrusion that can pass through the positioning hole to constitute a limiting constraint on the FPC board.

6. The integrated busbar welding tool according to claim 1, characterized in that: A pad is provided on the first supporting surface, which follows at least a portion of the busbar, so as to support and position the busbar.

7. The integrated busbar welding tool according to claim 1, characterized in that: A support block capable of abutting against the upper cover pressing plate is disposed on the first support surface to limit the minimum distance between the upper cover pressing plate and the first support surface.

8. The integrated busbar welding tool according to claim 1, characterized in that: A positioning block is disposed on the first supporting surface, and the positioning block is inserted into the busbar bracket to limit the position of the busbar bracket.

9. The integrated busbar welding tool according to any one of claims 1 to 8, characterized in that: A retaining assembly is provided between the carrier body and the pressing portion. When the pressing portion presses the FPC board, the retaining assembly enables the pressing portion to hold the FPC board tightly.

10. The integrated busbar welding tool according to claim 9, characterized in that: The retaining assembly includes a first component and a second component. When the pressing portion is closed toward the second supporting surface, the first component gradually approaches the second component to form a magnetic attraction fit.

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