Pressing tool

Abstract

The pressing tool comprises a support and a plurality of pressing assemblies installed on the first side of the support, the pressing assemblies are arranged in a matrix mode, and each pressing assembly comprises a pressing piece and at least one set of elastic pieces; each group of elastic pieces is configured to push the pressing piece in the direction far away from the bracket, so that the pressing piece presses a to-be-welded battery string below the pressing piece; the support is provided with a plurality of receding openings corresponding to the pressing pieces in position, and the receding openings are used for a welding heat source located on the second side of the support to transmit heat to the pressing pieces. And the pressing piece is made of a heat conduction material and is configured to conduct the received heat to the battery string in contact with the pressing piece, so that the welding strip in the battery string is welded and fixed with the battery piece. The to-be-welded battery string is pressed through the multiple pressing assemblies, a welding heat source penetrates through the support to irradiate and heat the pressing pieces through the receding openings in the support, heat is transmitted to the battery string assemblies through the pressing pieces made of heat conduction materials to be welded, the heat of the welding heat source can be fully utilized, and the welding efficiency is improved.

Description

Technical Field

[0001] The present application relates to the technical field of battery string equipment, and more specifically, to a pressing tool for pressing a battery string to be welded. Background Art

[0002] A battery string is formed by stacking welding tapes and battery cells in a predetermined order and welding the welding tapes to the main grid lines of the battery cells. A common welding process for series welding of battery cells is to receive a battery cell group and a welding tape group at a loading station through a conveying mechanism, and stack the battery cell group and the welding tape group into a battery string at the loading station; then move the battery string to be welded to a welding station, and fix the battery string by welding through a welding mechanism; then, move the welded battery string to an unloading station.

[0003] In order to ensure that the welding tape group of the battery string formed by stacking at the loading station closely adheres to the surface of the battery cell group, in the prior art, generally a tool is used to press the welding tape group onto the battery cell group. Since the welding mechanism is located above the tool to heat the battery string, the tool will absorb part of the heat released by the welding mechanism, thereby affecting the welding efficiency. Summary of the Utility Model

[0004] In view of the problem that the existing tool affects the welding efficiency, the present application provides a pressing tool that can improve the welding efficiency.

[0005] The technical solution of the present application is as follows: A pressing tool includes a bracket and a plurality of pressing components installed on the first side of the bracket, where:

[0006] The plurality of pressing components are arranged in a matrix, and each pressing component includes a pressing member and at least one set of elastic members;

[0007] Each set of elastic members is configured to push the pressing member away from the bracket, so that the pressing member presses the battery string to be welded below;

[0008] A plurality of relief openings corresponding to the positions of each pressing member are formed on the bracket, and the relief openings allow a welding heat source located on the second side of the bracket to pass through to transfer heat to the pressing member;

[0009] The pressing member is made of a heat-conducting material, and the pressing member is configured to conduct the received heat to the contacted battery string, so that the welding tape and the battery cell in the battery string are welded and fixed.

[0010] Compress the battery string to be welded through a number of pressing components. Make the welding heat source irradiate and heat the pressing member through the relief opening on the bracket. The pressing member made of heat-conducting material transfers the heat to the battery string assembly for welding. This can make full use of the heat of the welding heat source and improve the welding efficiency. The heat provided by the welding heat source is not directly supplied to the battery string assembly, but the heat is transferred by means of the heat-conducting material, avoiding damage to the battery string assembly with a lower heat resistance than the heat-conducting material.

[0011] Optionally, the pressing member is a strip-shaped plate member, and the length direction of the pressing member is the same as the length direction of the bracket.

[0012] Setting the pressing member as a strip-shaped plate member extending along the length direction of the bracket can make the relief opening on the bracket correspondingly longer, allowing more heat of the welding heat source to pass through, and further improving the welding efficiency.

[0013] Optionally, a row of pressing components arranged along the width direction of the bracket is used to jointly press at least two solder tapes.

[0014] Configure the length direction of the pressing member to be perpendicular to the length direction of the solder tape: First, the pressing member is shorter, and each pressing member is floatingly installed on the fixed plate through an elastic member, so the pressing member is not easily stuck. Second, the pressing member is in approximate point-to-point contact with the solder tape, and the pressing member does not heat the entire solder tape, avoiding the situation of warping of the battery chip caused by uneven heating of the battery chip and the solder tape. Third, whether the pressing member presses on the battery chip or directly on the solder tape, it will not cause the solder tape to deflect. When the pressing member directly presses on the solder tape, since the pressing member presses on the upper surfaces of at least two solder tapes at the same time, a plane will be formed on the upper surfaces of at least two solder tapes, and the pressure of the pressing member will be borne at the same time. Therefore, the reaction forces of at least two solder tapes will act on the pressing member evenly and will not cause the pressing member to deflect.

[0015] Optionally, the edge of the lower pressing surface of the pressing member is chamfered.

[0016] Setting the edge of the lower pressing surface of the pressing member as a chamfer can prevent the edge of the lower pressing surface of the pressing member from scratching the battery chip.

[0017] Optionally, the bracket includes a fixed plate and two supports. A number of pressing components and a number of relief openings are both arranged on the fixed plate. The two supports are respectively installed at both ends of the fixed plate along its own length direction. The two supports are used to support the fixed plate, and a receiving space for the lifting of the pressing components is formed below the fixed plate and the two supports on the first side of the fixed plate.

[0018] Support the fixed plate through two supports and form a receiving space under the fixed plate, which can prevent the fixed plate from interfering with the battery chip or the solder tape. The weight of the fixed plate is borne by the two supports, and the weight of the entire pressing tooling will not be all applied to the battery string assembly, avoiding damage to the battery chip by the pressing tooling.

[0019] Optionally, the two supports are made of ferromagnetic materials.

[0020] The supports are made of ferromagnetic materials and can be directly adsorbed by magnetic force, which is convenient for the fixation of the tooling and the handling and movement of the tooling.

[0021] Optionally, the lower ends of the outer sides of the two supports are respectively recessed inward to form support steps, and the support steps have step surfaces.

[0022] Setting the lower ends of the outer sides of the supports as support steps can prevent the pressing tooling from being directly placed on the battery cells, thus avoiding the risk of crushing the battery cells. There is a loading mechanism on both sides of the conveyor line. The loading ends of the loading mechanism cooperate with the step surfaces of the pressing tooling to load the tooling, and through rotation or lateral movement, the tooling is gradually placed on the battery cells, which can avoid crushing the battery cells.

[0023] Optionally, each set of elastic members includes a support rod, a spring and a locking member. The first end of the support rod is fixed on the pressing member, the second end of the support rod is slidably installed on the bracket and limited by the locking member, and the spring is sleeved on the support rod between the pressing member and the bracket.

[0024] Installing the spring between the pressing member and the bracket, and making the pressing member press on the battery string through the elastic force of the spring, can make the pressing member better fit the battery string.

[0025] Optionally, a boss is arranged on the side of the pressing member close to the bracket, and the first end of the support rod is fixed on the boss.

[0026] Arranging a boss on the pressing member can increase the local strength of the pressing member and prevent the support rod from damaging the pressing member under the elastic force of the spring.

[0027] Optionally, each pressing assembly includes two sets of elastic members, and the two sets of elastic members are arranged at intervals along the length direction of the pressing member.

[0028] Each pressing assembly presses the pressing member through two sets of elastic members, making the pressing member fit the battery string very well, preventing the situation that one side of the pressing member is high and the other side is low, and the pressing member is not easy to get stuck.

[0029] Optionally, each relief opening extends along the length direction of the bracket.

[0030] Setting the relief opening to extend along the length direction of the bracket, which is consistent with the length direction of the pressing member, can maximize the transfer of the heat of the welding heat source to the pressing member and improve the utilization rate of the heat.

[0031] Optionally, the pressing member is graphite, graphite copper foil, diamond, diamond aluminum, diamond copper, aluminum alloy, stainless steel, aluminum matrix composite, copper matrix composite, ceramic, alumina ceramic, zirconia ceramic, aluminum nitride ceramic, silicon carbide material or quartz.

[0032] The material of the pressing member can be selected according to the actual situation, which increases the flexibility of material selection.

[0033] Optionally, at least two limiting grooves are formed on the downward pressing surface of the pressing member, and each limiting groove is for partially clamping a welding tape.

[0034] The limiting groove provided on the downward pressing surface of the pressing member can clamp the welding tape therein, preventing the position of the welding tape from moving.

[0035] Optionally, the cross-sectional shape of the limiting groove is triangular, semi-circular, square, U-shaped, trapezoidal or semi-elliptical.

[0036] The cross-sectional shape of the limiting groove can be selected according to the cross-sectional shape of the welding tape, which can better fix the welding tape. Description of the Drawings

[0037] Figure 1 is a schematic three-dimensional structure diagram of an optional embodiment of the present application;

[0038] Figure 2 is Figure 1 the top view of.

[0039] Figure 1 , Figure 2 In, it includes:

[0040] Pressing tooling 10;

[0041] Bracket 11, support 111, fixing plate 112, relief opening 113;

[0042] Pressing assembly 12, pressing member 121, boss 131, elastic member 122, support rod 141, spring 142, locking member 143;

[0043] Battery string 100, battery cell 101, welding tape 102. Detailed Embodiment

[0044] To make the above objects, features and advantages of the present application more obvious and understandable, the present application will be further described in detail below with reference to the drawings and specific embodiments.

[0045] As Figure 1 , Figure 2 shown, the present application is a pressing tooling 10 for pressing the battery string 100 to be welded in a battery cell string welder.

[0046] The pressing tooling 10 includes a bracket 11 and a plurality of pressing assemblies 12 installed on the first side of the bracket 11 ( Figure 1 the lower side in)

[0047] Wherein: A plurality of pressing components 12 are arranged in a matrix, and each pressing component 12 includes a pressing member 121 and at least one set of elastic members 122;

[0048] Each set of elastic members 122 is configured to push the pressing member 121 away from the bracket 11, so that the pressing member 121 presses the battery string 100 to be welded below;

[0049] A plurality of relief openings 113 corresponding to the positions of each pressing member 121 are formed in the bracket 11, and the relief openings 113 allow the welding heat source located on the second side of the bracket 11 ( Figure 1 in this case, the upper side) to pass through and transfer heat to the pressing member 121;

[0050] The pressing member 121 is made of a heat-conducting material, and the pressing member 121 is configured to conduct the received heat to the contacted battery string 100, so that the solder tape 102 in the battery string 100 is welded and fixed to the battery cell 101.

[0051] The battery string 100 to be welded is pressed by a plurality of pressing components 12, the welding heat source passes through the bracket 11 through the relief openings 113 in the bracket 11 to irradiate and heat the pressing member 121, and the pressing member 121 made of a heat-conducting material transfers the heat to the battery string assembly for welding, so that the heat of the welding heat source can be fully utilized to improve the welding efficiency. The heat provided by the welding heat source is not directly provided to the battery string assembly, but the heat is transferred by means of a heat-conducting material, avoiding damage to the battery string assembly with a lower heat resistance than the heat-conducting material.

[0052] In one of the embodiments, optionally, the pressing member 121 is a long strip-shaped plate member, and the length direction of the pressing member 121 is the same as the length direction of the bracket 11.

[0053] Setting the pressing member 121 as a long strip-shaped plate member extending along the length direction of the bracket 11 can make the relief openings 113 on the bracket 11 correspondingly longer, allowing more heat of the welding heat source to pass through, and further improving the welding efficiency. The length direction of the pressing member 121 is perpendicular to the length direction of the solder tape 102 of the battery string 100 below. Therefore, the pressing member 121 only partially contacts or is partially close to the solder tape 102, and the pressing member 121 does not heat the entire solder tape 102. Therefore, the solder tape 102 does not heat the part of the battery cell in contact with itself, avoiding warping of the battery cell due to uneven heating.

[0054] Optionally, a row of pressing components 12 arranged along the width direction of the bracket 11 are used to jointly press at least two solder tapes 102.

[0055] In the prior art, the length direction of the pressing member is the same as the length direction of the solder tape, the length of the pressing member is slightly less than that of the solder tape, and the pressing member presses the solder tape along the length direction of the solder tape. The pressing member with such a structure has the following disadvantages: 1. After long-term operation, if the spring is fatigued and damaged, it is very easy to cause inconsistent elastic forces on both sides, resulting in a situation where one side of the pressing member is high and the other side is low, leading to the situation of virtual pressing of the solder tape and affecting the heat conduction efficiency of the pressing member; 2. Since the pressing member presses the entire solder tape in the same direction, the heat absorbed by the pressing member will be quickly transferred to the whole solder tape, causing the temperature of the whole solder tape to rise. And the pressing member is not in contact with the battery cell. Therefore, the temperature of the part of the battery cell in contact with the solder tape will be higher than other parts. And the solder tape basically spans the width direction of the battery cell. Therefore, there will be multiple linear parts with high temperature on the battery cell, resulting in the situation that the battery cell is prone to warping or curling; 3. The cross-section of the solder tape is a variety of three-dimensional structures such as circular, triangular or flat. And the width of the pressing member is generally much larger than the width of the solder tape itself. In addition, the pressing member is floatingly installed on the fixing plate. Therefore, when the pressing member presses the solder tape downward along the length direction of the solder tape, the pressing member may be deflected under the reaction force of the solder tape. When the deflected pressing member presses the solder tape downward, it may rub the solder tape, resulting in the offset of the solder tape, and the soldered battery string will show a white exposed situation.

[0056] However, in the present application, the length direction of the pressing member 121 is perpendicular to the length direction of the solder tape 102, overcoming the disadvantages of the pressing member in the prior art: First, the pressing member 121 in the present application is short, and each pressing member 121 is floatingly installed on the fixing plate 112 through the elastic member 122. Therefore, the pressing member 121 is not easily stuck; Second, the pressing member 121 is in approximate point-to-point contact with the solder tape 102, and the pressing member 121 will not heat the entire solder tape 102, avoiding the situation of warping of the battery cell caused by uneven heating of the battery cell 101 and the solder tape 102; Third, whether the pressing member 121 presses on the battery cell 101 or directly presses on the solder tape 102, it will not cause the solder tape 102 to be deflected. When the pressing member 121 directly presses on the solder tape 102, since the pressing member 121 presses on the upper surfaces of at least two solder tapes 102 at the same time, a plane will be formed on the upper surfaces of the at least two solder tapes 102 to bear the pressure of the pressing member 121 at the same time. Therefore, the reaction forces of the at least two solder tapes 102 will act on the pressing member 121 evenly and will not cause the pressing member 121 to be deflected.

[0057] In one of the embodiments, optionally, the edge of the lower pressing surface of the pressing member 121 is chamfered.

[0058] The edge of the lower pressing surface of the pressing member 121 is set to be chamfered, which can avoid scratching the battery cell 101 by the edge of the lower pressing surface of the pressing member 121.

[0059] Optionally, the bracket 11 includes a fixing plate 112 and two supports 111. A plurality of pressing components 12 and a plurality of relief openings 113 are disposed on the fixing plate 112. The two supports 111 are respectively installed at two ends of the fixing plate 112 along its length direction. The two supports 111 are used to support the fixing plate 112, and a receiving space for the lifting of the pressing components 12 is formed below the fixing plate 112 and the two supports 111 on the first side of the fixing plate 112.

[0060] The fixing plate 112 is supported by the two supports 111, and a receiving space is formed below the fixing plate 112, which can prevent the fixing plate 112 from interfering with the battery cell 101 or the solder tape 102.

[0061] In one of the embodiments, optionally, the two supports 111 are made of ferromagnetic material.

[0062] The supports 111 are made of ferromagnetic material, which can be directly adsorbed by magnetic force, facilitating the fixing of the tooling. At the same time, the handling components of the equipment for handling the pressing tooling can pick up the pressing tooling by magnetic adsorption, simplifying the structure of the handling components and improving the handling efficiency.

[0063] Optionally, the lower ends of the outer sides of the two supports 111 are respectively recessed inward to form support steps, and the support steps have step surfaces.

[0064] By setting the lower ends of the outer sides of the supports 111 as support steps, it can be avoided that the pressing tooling 10 is directly placed on the battery cell 101, thus reducing the risk of crushing the battery cell 101. There is a carrying mechanism on both sides of the conveyor line. The carrying ends of the carrying mechanism cooperate with the step surfaces of the pressing tooling 10 to carry the tooling, and through rotation or lateral movement, the tooling is gradually placed on the battery cell 101, which can avoid crushing the battery cell 101.

[0065] In one of the embodiments, optionally, each set of elastic members 122 includes a support rod 141, a spring 142 and a locking member 143. The first end of the support rod 141 is fixed on the pressing member 121, the second end of the support rod 141 is slidably installed on the bracket 11 and is limited by the locking member 143, and the spring 142 is sleeved on the support rod 141 between the pressing member 121 and the bracket 11.

[0066] The spring 142 is installed between the pressing member 121 and the bracket 11. By the elastic force of the spring 142, the pressing member 121 is pressed against the battery string 100, which can make the pressing member 121 better fit the battery string 100.

[0067] In one of the embodiments, optionally, a convex platform 131 is configured on the side of the pressing member 121 close to the bracket 11, and the first end of the support rod 141 is fixed on the convex platform 131.

[0068] A boss 131 is arranged on the pressing member 121, which can increase the local strength of the pressing member 121 and prevent the support rod 141 from damaging the pressing member 121 under the elastic force of the spring 142.

[0069] In one of the embodiments, optionally, each pressing assembly 12 includes two groups of elastic members 122, and the two groups of elastic members 122 are arranged at intervals along the length direction of the pressing member 121.

[0070] Each pressing assembly 12 presses against the pressing member 121 through two groups of elastic members 122, so that the pressing member 121 fits well with the battery string 100, and the situation where one side of the pressing member 121 is high and the other side is low will not occur, and the pressing member 121 is not easily stuck.

[0071] In one of the embodiments, optionally, each relief opening 113 extends along the length direction of the bracket 11.

[0072] The relief opening 113 is arranged to extend along the length direction of the bracket 11, which is consistent with the length direction of the pressing member 121, so that the heat of the welding heat source can be transferred to the pressing member 121 to the maximum extent, improving the utilization rate of heat.

[0073] In one of the embodiments, optionally, the pressing member 121 is made of graphite, graphite copper foil, diamond, diamond aluminum, diamond copper, aluminum alloy, stainless steel, aluminum matrix composite, copper matrix composite, ceramic, alumina ceramic, zirconia ceramic, aluminum nitride ceramic, silicon carbide material or quartz.

[0074] The above materials have relatively high thermal conductivity, and the material of the pressing member 121 can be selected according to the actual situation, increasing the flexibility of material selection.

[0075] In one of the embodiments, optionally, at least two limiting grooves are formed on the pressing surface of the pressing member 121, and each limiting groove is for partially engaging a welding tape 102.

[0076] The limiting grooves provided on the pressing surface of the pressing member 121 can engage the welding tape 102 therein, preventing the position of the welding tape 102 from moving.

[0077] In one of the embodiments, optionally, the cross-sectional shape of the limiting groove is triangular, semi-circular, square, U-shaped, trapezoidal or semi-elliptical.

[0078] The cross-sectional shape of the limiting groove can be selected according to the cross-sectional shape of the welding tape 102, which can better fix the welding tape 102.

[0079] The working process of the present application is as follows: The tooling 10 presses the battery string 100 against the conveying surface of the conveying mechanism, and the conveying mechanism conveys the battery string 100 and the tooling 10 to the welding station. The welding mechanism emits heat (such as laser) to heat a battery cell 101 and a solder tape 102 pressed by the tooling 10 respectively.

[0080] The welding heat moves along Figure 2 the path indicated by the arrow in, and sequentially heats the pressing member 121. After the pressing member 121 absorbs the heat, it quickly conducts the heat to the contacted battery cell 101 or solder tape 102 to heat them, so that the battery cell 101 and the solder tape 102 are fixed together.

[0081] The above has described the present application in sufficient detail with a certain degree of particularity. Those of ordinary skill in the art should understand that the description in the embodiments is only exemplary, and all changes made without departing from the true spirit and scope of the present application should fall within the protection scope of the present application. The scope of protection required by the present application is defined by the claims described, rather than by the above description in the embodiments.

Claims

1. A pressing tool, characterized in that: The clamping tool comprises a bracket and a plurality of clamping components installed on a first side of the bracket, wherein: A plurality of pressing components are arranged in a matrix, each of which comprises a pressing member and at least one group of elastic members; Each group of elastic members is configured to push the pressing member in a direction away from the bracket so that the pressing member presses the battery string to be welded below; The bracket is provided with a plurality of clearance openings corresponding to the position of each pressing member, wherein the clearance openings allow the welding heat source located on the second side of the bracket to pass through to transfer heat to the pressing member; The pressing member is made of a heat-conducting material and is configured to conduct the received heat to the contacting battery string so that the welding strips in the battery string are welded and fixed to the battery cells.

2. The pressing tool according to claim 1, characterized in that: The pressing member is a long strip-shaped plate, and the length direction of the pressing member is in the same direction as the length direction of the bracket.

3. The pressing tool according to claim 1 or 2, characterized in that: A row of clamping assemblies arranged along the width direction of the bracket is used to jointly clamp at least two welding strips.

4. The pressing tool according to claim 1, characterized in that: The edge of the pressing surface of the pressing piece is chamfered.

5. The pressing tool according to claim 1, characterized in that: The bracket includes a fixed plate and two supports, a plurality of clamping assemblies and a plurality of clearance openings are arranged on the fixed plate, the two supports are respectively installed at both ends of the fixed plate along its own length direction, the two supports are used to support the fixed plate, and the two supports and the fixed plate form an accommodating space for the clamping assembly to be lifted and lowered below the first side of the fixed plate.

6. The pressing tool according to claim 5, characterized in that: The two supports are made of ferromagnetic material.

7. The pressing tool according to claim 5, characterized in that: The outer lower ends of the two supports are respectively concave to form support steps, and the support steps have step surfaces.

8. The pressing tool according to claim 1, characterized in that: Each group of elastic parts includes a support rod, a spring and a locking part. The first end of the support rod is fixed on the clamping part, the second end of the support rod is slidably installed on the bracket and limited by the locking part, and the spring is sleeved on the support rod between the clamping part and the bracket.

9. The pressing tool according to claim 8, characterized in that: A boss is disposed on one side of the pressing member close to the bracket, and the first end of the support rod is fixed on the boss.

10. The pressing tool according to claim 1, characterized in that: Each pressing assembly includes two groups of elastic members, and the two groups of elastic members are arranged at intervals along the length direction of the pressing member.

11. The pressing tool according to claim 1, characterized in that: Each of the clearance openings extends along the length direction of the bracket.

12. The pressing tool according to claim 1, characterized in that: The pressing member is graphite, graphite copper foil, diamond, diamond aluminum, diamond copper, aluminum alloy, stainless steel, aluminum-based composite material, copper-based composite material, ceramic, alumina ceramic, zirconium oxide ceramic, aluminum nitride ceramic, silicon carbide material or quartz.

13. The pressing tool according to claim 1, characterized in that: The lower pressing surface of the pressing piece is provided with at least two limiting grooves, each of which is used for a welding strip to be partially inserted.

14. The pressing tool according to claim 13, characterized in that: The cross-sectional shape of the limiting groove is triangular, semicircular, square, U-shaped, trapezoidal or semi-elliptical.

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