A positioning device and an electrical connection method for soft package battery module electrical connection

Abstract

The application discloses a positioning device and an electric connection method for soft package battery module electric connection, which comprises a plurality of square single unit replacement plates and a bottom support. One end of the bottom support is fixed with an operation step, and the other end is provided with a pair of clamping plates. The distance between the clamping plates is just suitable for placing the square single unit replacement plates. The vertical edges of the clamping plates are placed on the operation step. The operation step is provided with a containing space for inserting the tab between the clamping plates. The top of the containing space is provided with a welding bottom plate. The welding bottom plate is provided with a bottom plate groove. A pair of linear bearings and an elbow clamp are vertically arranged on the operation step. A welding pressing plate above the welding bottom plate is installed on the linear bearings and the elbow clamp. The welding pressing plate is provided with a welding long groove. The welding pressing plate is controlled to move up and down along the linear bearings through the elbow clamp, so that the welding pressing plate is pressed on the welding pressing plate. The application simplifies the module electric connection process, improves the yield and assembly efficiency.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of soft package battery module electric connection, and particularly relates to a positioning device for soft package battery module electric connection and an electric connection method. BACKGROUND

[0002] Soft package battery modules are widely used in various electronic devices and energy storage systems due to their high energy density and simple structure. In the assembly of soft package battery modules, each soft package battery cell needs to be connected in series and parallel for electrical performance cycling to form a module. Currently, two methods are used, one is bolt electric connection, which involves punching and bending the positive and negative tabs of the soft package battery cell, using bolts, nuts, flat washers, etc., and then performing corresponding electric connection; the other is laser welding, which uses a copper plate as a base plate, bends the positive and negative tabs of the soft package battery cell, and welds them on the conductive copper plate for electric connection.

[0003] However, the existing technology has defects and deficiencies. First, the positive and negative tabs of the soft package battery cell need to be pretreated, which increases the additional production process, and the pretreatment method is not accurate, which can cause large positioning errors in subsequent electric connection. Second, the positive and negative tabs of the soft package battery cell need to be bent, which causes stress on the tab root and easily damages the battery, which is not conducive to the mechanical environment requirements of the battery. Third, multiple components need to be assembled, which increases the weight of the battery module and increases the cost, which is not conducive to improving the specific energy of the module. SUMMARY

[0004] To solve the problems of the prior art, the present application provides a positioning device for soft package battery module electric connection and an electric connection method, which simplifies the module electric connection process, improves the yield and assembly efficiency.

[0005] The present application is implemented as follows: a positioning device for soft package battery module electric connection, comprising a plurality of square single replacement plates and a bottom support, one end of the bottom support is fixed with an operation step, and the other end is provided with a pair of parallel clamping plates perpendicular to the surface of the bottom support, the vertical edges of the clamping plates are on the operation step, the distance between the clamping plates is just enough to put the square single replacement plate, the operation step between the clamping plates is provided with a receiving space for inserting the tab, the top of the receiving space is provided with a welding base plate, the welding base plate is provided with a base plate groove, a pair of linear bearings and an elbow clamp are vertically arranged on the operation step, a welding pressure plate above the welding base plate is installed on the pair of linear bearings and the elbow clamp, the welding pressure plate is provided with a welding long groove, the welding pressure plate is controlled to move up and down along the pair of linear bearings by the elbow clamp, and the welding pressure plate is pressed on the welding pressure plate.

[0006] The clamping plate is provided with a concave slot with a top opening in the middle, which facilitates the taking and placing of the single replacement plate or soft package battery cell placed between the clamping plates.

[0007] The monomer replacement plate is smooth and flat on the outer surface, has no defects and no sharp edges, and is made of bakelite.

[0008] The bottom support is made of bakelite.

[0009] The welding base plate is made of red copper material, and the size of the groove processed in the middle of the base plate is the welding area; the welding pressing plate is made of red copper material, and the size of the long groove processed in the middle of the welding pressing plate is the welding area.

[0010] The above-mentioned positioning device for the electrical connection of the soft package battery module is used in the electrical connection method, which comprises the following steps in sequence:

[0011] (1) first place the monomer replacement plate between the pair of clamping plates of the welding positioning device bottom support, the number of which is the number of parallel connection design of the module string minus 2;

[0012] (2) prepare two soft package monomer batteries, and insulate the end tab that does not need to be welded;

[0013] (3) place the two soft package monomer batteries that need to be connected in series and in parallel on the monomer replacement plate, and place the tab on the welding base plate, at the same time confirm the tab welding position, place the elbow clamp, and make the welding pressing plate press tightly on the tab;

[0014] (4) place the welding positioning device at the laser welding machine station, adjust the laser beam for welding;

[0015] (5) after welding, take out one monomer replacement plate, flip the two soft package monomer batteries, place the un-welded end tab on the welding base plate, and stack a new soft package monomer battery on it, stretch the tab of the bottom monomer battery to the accommodation space below the welding base plate, confirm the tab welding position of the two upper monomer batteries, place the elbow clamp, and make the welding plate press tightly on the tab;

[0016] (6) repeat step (4) welding, and repeat step (5) to start the cycle until the electrical connection of the battery module in series and in parallel is completed.

[0017] The present application has the advantages and technical effects: simplifying the module electrical connection process, improving the assembly efficiency, improving the electrical connection effectiveness; avoiding the damage caused by the bending of the soft package battery tab, improving the yield, optimizing the battery module structure, and improving the mechanical properties of the module; reducing the number of auxiliary parts, reducing the weight of the module structure, and effectively improving the specific energy of the soft package battery module. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 is the structure diagram of the positioning device for the electrical connection of the soft package battery module.

[0019] Figure 2It is the structure diagram of the single battery replacement plate of the positioning device for the soft package battery module electric connection of the application.

[0020] Figure 3 It is the use state diagram of the positioning device for the soft package battery module electric connection of the application.

[0021] Figure 4 It is the cross-sectional view of step (4) welding of the positioning device for the soft package battery module electric connection of the application.

[0022] Figure 5 It is the cross-sectional view of step (5) welding of the positioning device for the soft package battery module electric connection of the application. DETAILED DESCRIPTION

[0023] In order to make the purpose, technical scheme and advantages of the present application clearer, the present application is further described in detail below with reference to the drawings. It should be understood that the specific embodiments described herein are only used to explain the present application and should not be used to limit the present application.

[0024] In the description of the present application, it should be noted that the terms "upper", "middle", "lower", "inner", "outer", "two sides" and the like indicate the orientation or positional relationship shown in the drawings, and are only a simplified description for the convenience of describing the present application, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application.

[0025] In the description of the present application, it should be noted that unless otherwise explicitly specified and limited, the terms "mounting", "provided with", "connection" and the like should be broadly understood, for example, "connection" can be fixed connection, can also be detachable connection, or integral connection; can be mechanical connection, can also be electrical connection; can be directly connected, can also be indirectly connected through an intermediate medium, can be the communication inside two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0026] As Figure 1 , 2As shown, the positioning device for the electrical connection of the soft package battery module of the present application comprises a plurality of square monomer replacement plates 10 and a bottom support 1. On the surface of the bottom support 1, one end is fixed with an operating step 2, and the other end is provided with a pair of parallel clamping plates 3 perpendicular to the surface of the bottom support 1. The vertical edges of the pair of clamping plates 3 are on the operating step 2, and the distance between the pair of clamping plates 3 is just suitable for placing the square monomer replacement plate 10. The operating step 2 between the pair of clamping plates 3 is provided with a receiving space 4 for inserting the tab. The top of the receiving space 4 is provided with a welding base plate 5, and the welding base plate 5 is provided with a base plate groove 6. A pair of linear bearings 7 and an elbow clamp 11 are vertically arranged on the operating step 2. A welding pressure plate 8 above the welding base plate 5 is installed on the pair of linear bearings 7 and the elbow clamp 11. The welding pressure plate 8 is provided with a welding long groove 9. The welding pressure plate 8 is controlled to move up and down along the pair of linear bearings 7 through the elbow clamp 11, so that the welding pressure plate 8 is pressed on the welding pressure plate 8.

[0027] The middle part of the clamping plate 3 is provided with a concave groove 12 with an open top. The concave groove 12 facilitates the taking and placing of the monomer replacement plate 10 or the soft package monomer battery 13 placed between the pair of clamping plates 3.

[0028] The outer surface of the monomer replacement plate 10 is smooth, flat and defect-free, and has no sharp corners. The monomer replacement plate 10 is made of bakelite material. The bottom support 1 is made of bakelite material. The welding base plate 5 is made of red copper material, and the middle-processed base plate groove 6 has a welding area. The welding pressure plate 8 is made of red copper material, and the middle-processed welding long groove 9 has a welding area.

[0029] The monomer replacement plate is made of non-metallic bakelite material, and the outer shape size should be consistent with the body size of the soft package battery. The outer surface needs to be smooth, flat, defect-free and without sharp corners to prevent the soft package battery surface from being damaged.

[0030] In the welding positioning device, the bottom support part supporting the monomer battery is made of non-metallic bakelite material, and the internal size is the size of the monomer replacement plate. The height can be designed according to the design height of the battery module series and parallel connection.

[0031] In the welding positioning device, the welding base plate is made of red copper material, which effectively supports the pressure of the welding pressure plate during the laser welding of the tab, provides a heat dissipation channel, prevents the battery from being heated, and processes a groove in the middle, which has a welding area to prevent the tab from being welded to the welding base plate during laser welding, causing damage to the battery. The welding pressure plate is also made of red copper material, and a long groove is processed in the middle, which has a welding area to allow the laser beam to pass through. The lower part of the pressure plate needs to be able to press the tab tightly to complete the welding of the tab.

[0032] The linear bearing and the elbow clamp are prior art and are purchased from the market, and are not described.

[0033] The electrical connection method using the above-mentioned positioning device for the electrical connection of the soft package battery module comprises the following steps in sequence:

[0034] (1) First, the monomer replacement plate is placed between a pair of clamping plates of the welding positioning device base, the number is the number of module string parallel design minus 2;

[0035] (2) Prepare two soft package monomer batteries, and insulate the end tab that does not need to be welded;

[0036] (3) Place the two soft package monomer batteries that need to be connected in series and in parallel on the monomer replacement plate, and place the tab on the welding base plate, confirm the tab welding position, place the elbow clamp, and press the welding plate on the tab, see Figure 3 .

[0037] (4) Place the welding positioning device at the laser welding machine station, adjust the laser beam 14 for welding, see Figure 4 ;

[0038] (5) After welding, take out one monomer replacement plate, flip the two soft package monomer batteries, place the end tab that has not been welded on the welding base plate, and stack a new soft package monomer battery on it, extend the tab 15 of the bottom monomer battery to the accommodation space below the welding base plate, confirm the tab welding position of the two monomer batteries on the top, place the elbow clamp, and press the welding plate on the tab, see Figure 5 ;

[0039] (6) Repeat step (4) welding, and repeat step (5) to start the cycle until the battery module series and parallel electrical connection is completed.

[0040] The welding positioning device of the present application connects each soft package monomer battery in series and in parallel by directly laser welding the tab, and completes the electrical connection. The electrical connection process design in the soft package battery module assembly is simplified, the process method is simple and reliable, the soft package battery electrical connection is directly reliable, the yield and assembly efficiency are improved, the weight proportion of the electrical connection structure is reduced, and the specific energy of the soft package battery module is greatly improved.

[0041] The present application directly welds the tab of the soft package battery for electrical connection, simplifies the electrical connection design of the soft package battery module, and improves the assembly efficiency and the effectiveness of the electrical connection. The tab of the soft package battery does not need to be bent, which avoids damage caused by bending stress of the battery tab, improves the yield, optimizes the mechanical properties of the module structure, reduces the components required for the assembly of the soft package battery module, reduces the weight of the module structure, and greatly improves the specific energy of the soft package battery module.

[0042] The present application uses different models and sizes of soft package monomer batteries in series and in parallel electrical connection assembly under the premise of unchanged basic form structure. These all belong to the protection scope of the present application.

[0043] The above merely describes preferred embodiments of the present application, and is not used to limit the present application, any modification, equivalent replacement and improvement within the spirit and principle of the present application should be included in the protection scope of the present application.

Claims

1. A positioning device for soft package battery module electrical connection, characterized in that, The utility model relates to a kind of soft package battery welding positioning device, including multiple square monomer replacement board (10) and bottom support (1), one end is fixed with operating step (2) on the surface of bottom support (1), the other end is provided with a pair of parallelly arranged and perpendicular to the surface of bottom support (1) clamping plate (3), a pair of clamping plate (3) vertical edge top on operating step (2), the distance between a pair of clamping plate (3) is just placed into square monomer replacement board (10), operating step (2) is opened in the clamping plate (3) between and is used for inserting tab accommodating space (4), the top of accommodating space (4) is provided with welding base plate (5), welding base plate (5) is opened with base plate groove (6), operating step (2) is vertically provided with a pair of linear bearing (7) and an elbow clamp (11), welding pressure plate (8) above welding base plate (5) is installed on a pair of linear bearing (7) and elbow clamp (11), welding pressure plate (8) is opened with welding long slot (9), welding pressure plate (8) is pressed on welding pressure plate (8) by controlling welding pressure plate (8) to move up and down along a pair of linear bearing (7) through elbow clamp (11); The middle of the clamping plate (3) is opened with a concave groove (12) with an open top, which facilitates the placement and removal of the monomer replacement board (10) or soft package monomer battery (13) placed between the pair of clamping plates (3); The outer surface of the monomer replacement board (10) is smooth, flat, defect-free, and free of sharp edges, and is made of bakelite material. The outer dimensions are consistent with the body dimensions of the soft package battery. The bottom support (1) is made of bakelite material, and the internal dimensions of the bottom support are the same as the dimensions of the monomer replacement board. The welding base plate (5) is made of red copper material, and the base plate groove (6) processed in the middle has a welding area size. The welding pressure plate (8) is made of red copper material, and the welding long slot (9) processed in the middle has a welding area size.

2. The method of electrically connecting using the positioning device for electrically connecting a soft-pack battery module of claim 1, characterized in that, The steps are as follows: (1) Place the monomer replacement board between the pair of clamping plates of the welding positioning device bottom support first, with a quantity of module string parallel design quantity minus 2; (2) Prepare two soft package monomer batteries, and insulate the tab at one end that does not need to be welded; (3) Place the two soft package monomer batteries that need to be connected in series and parallel on the monomer replacement board, with the tabs placed on the welding base plate. Confirm the tab welding position, place the elbow clamp, and press the welding pressure plate tightly on the tabs; (4) Place the welding positioning device at the laser welding machine station, adjust the laser beam, and weld; (5) After welding, remove one monomer replacement board, flip the two soft package monomer batteries, place the un-welded tab at one end on the welding base plate, and stack a new soft package monomer battery on top. Extend the tab of the bottom monomer battery to the accommodating space below the welding base plate, confirm the tab welding position of the two upper monomer batteries, place the elbow clamp, and press the welding plate tightly on the tabs; (6) Repeat step (4) to weld, and repeat step (5) to start the cycle until the battery module string parallel electrical connection is completed.

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