CN217475095U

CN217475095U - Be used for busbar welded to compress tightly detection mechanism and battery busbar welding equipment

Info

Publication number: CN217475095U
Application number: CN202221357764.2U
Authority: CN
Inventors: 李武波
Original assignee: Svolt Energy Technology Co Ltd
Current assignee: Svolt Energy Technology Co Ltd
Priority date: 2022-05-31
Filing date: 2022-05-31
Publication date: 2022-09-23
Anticipated expiration: 2032-05-31

Abstract

The utility model provides a be used for busbar welded to compress tightly detection mechanism and battery busbar welding equipment. The utility model discloses a compress tightly detection mechanism and establish on battery busbar welding equipment, and can be driven and reciprocate in the top of battery module. The pressing detection mechanism comprises a substrate made of an insulating material, and a pressing nozzle and a displacement detection device which are arranged on the substrate; the pressure nozzle is arranged at the bottom of the substrate in a manner of moving up and down, an elastic piece is arranged between the pressure nozzle and the substrate, and the pressure nozzle is pressed against the bus bar of the battery module under the action of the elastic piece; the displacement detection device is used for detecting the displacement of the pressure nozzle relative to the upward movement of the substrate. The utility model discloses a be used for busbar welded to compress tightly detection mechanism through displacement detection device to the detection of the displacement volume that shifts up of the relative base plate of pressure nozzle, can estimate out the packing force that the pressure nozzle applyed on the busbar to detect out the compressing tightly condition of busbar on utmost point post, be favorable to promoting the welding quality of battery busbar.

Description

Be used for busbar welded to compress tightly detection mechanism and battery busbar welding equipment

Technical Field

The utility model relates to a battery manufacturing technical field, in particular to a be used for busbar welded detection mechanism that compresses tightly. Additionally, the utility model discloses still relate to a battery busbar welding equipment.

Background

With the rapid development of the electric automobile industry, the laser welding process is more and more widely used in the manufacturing process of the power battery module for the automobile. In order to obtain good welding results, the need for monitoring during laser welding is becoming more and more stringent. The pole and the aluminum bar (bus bar) need to be well pressed together before welding, and whether the pressed state is good or not is an important factor influencing the welding quality, so that the detection and control of the pressed state of the pole and the aluminum bar are an important ring for welding the bus bar and the pole on the battery module.

In the welding process of the bus bar and the pole, the bus bar and the pole are not fully attached due to insufficient pressure, and quality accidents such as cold welding and the like can be caused, so that the compressing of the bus bar and the pole and the stability and effectiveness of the performance of the detection mechanism are important technical factors in the welding process.

In the prior art, in the production aspect of a new energy power battery module, a compression detection mechanism for welding a bus bar and a pole mainly adopts a pressure sensor for detection; the disadvantages are mainly reflected in the following points:

the structure is complex, the fluctuation range of the reading number of the sensor is large, and the read data is unstable and cannot be used as accurate reference;

two, mechanism space demand is high, and several are usually compressed tightly the position and are integrated and use a pressure sensor to detect, can't carry out independent control to single welding position, appear individual welding position not examining easily and the false-soldering's condition.

Based on the above problems, there is a need for an optimized and improved pressing mechanism for welding battery busbars.

SUMMERY OF THE UTILITY MODEL

In view of this, the utility model aims at providing a compress tightly detection mechanism for busbar welded to in the condition of compressing tightly of detecting the busbar on utmost point post, do benefit to the welding quality who promotes battery busbar.

In order to achieve the above purpose, the technical scheme of the utility model is realized like this:

a pressing detection mechanism for bus bar welding is arranged on battery bus bar welding equipment and can be driven to move up and down above a battery module; the pressing detection mechanism comprises a substrate made of an insulating material, and a pressing nozzle and a displacement detection device which are arranged on the substrate; the pressure nozzle is arranged at the bottom of the substrate in a manner of moving up and down, an elastic piece is arranged between the pressure nozzle and the substrate, the pressure nozzle is pressed against a bus bar of the battery module under the action of the elastic piece, and an inner cavity for providing a welding space is arranged on the pressure nozzle; the displacement detection device is used for detecting the displacement of the pressure nozzle relative to the substrate moving upwards.

Furthermore, a plurality of pressure nozzles are arrayed on the substrate, and each pressure nozzle is provided with one displacement detection device; each pressure nozzle corresponds to the plurality of busbars on the battery module respectively.

Further, the displacement detection device adopts a universal contact displacement sensor, and a detection head of the universal contact displacement sensor is abutted with the pressure nozzle; and/or the substrate is a glass fiber plate.

Furthermore, a first through hole and a mounting bracket positioned above the first through hole are arranged on the substrate; the universal contact type displacement sensor is installed on the installation support, and the detection head penetrates through the first through hole and abuts against the top of the pressure nozzle.

Furthermore, the pressure nozzle comprises an installation plate and a main body arranged on the installation plate, and the installation plate is arranged on the substrate in a vertically guiding and moving mode through a plurality of guide pins.

Furthermore, a guide hole for penetrating the guide pin is formed in the base plate, and the bottom end of the guide pin is fixedly connected with the mounting plate; the elastic piece is a compression spring sleeved on the guide pin, and two ends of the compression spring are respectively abutted against the base plate and the mounting plate.

Furthermore, the top of the inner cavity is open, the bottom of the pressure nozzle is provided with a nozzle opening which enables the bus bar to be exposed in the inner cavity, and the substrate is provided with a second through hole corresponding to the inner cavity.

Furthermore, one side of the second through hole is provided with an inflation inlet for filling protective gas into the inner cavity.

Compared with the prior art, the utility model discloses following advantage has:

the utility model discloses a compress tightly detection mechanism for busbar welding, through set up pressure nozzle and displacement detection device on the base plate to utilize the elastic component to exert a downward elasticity pretightning force for the pressure nozzle, in the base plate descends and compresses tightly the busbar process, the elastic component can overcome the compression stroke deviation that busbar thickness or utmost point post height error caused, so that all busbars can be compressed tightly on utmost point post; the upward displacement of the pressure nozzle relative to the substrate is detected through the displacement detection device, the force applied on the pressure nozzle by the elastic piece can be calculated, and then the pressing force applied on the bus bar by the pressure nozzle is estimated, so that the pressing detection mechanism capable of detecting the pressing condition of the bus bar on the pole is provided, and the welding quality of the battery bus bar is favorably improved.

In addition, the mounting plate is configured for the pressure nozzle, so that the main body can be conveniently arranged on the mounting plate, and the vertical guide movement of the main body on the substrate is realized through a plurality of guide pins connected to the mounting plate. The elastic piece adopts compression spring, overlaps the compression spring cover on the uide pin that can reciprocate to provide an elasticity pretightning force for the mounting panel, the installation configuration of being convenient for, and the wholeness can be reliable and stable.

Another object of the utility model is to provide a battery busbar welding equipment, battery busbar welding equipment adopts and has the utility model for busbar welded compresses tightly detection mechanism.

Further, the substrate is provided with a lifting mechanism for driving the substrate to move up and down, and a translation mechanism for driving the lifting mechanism to move horizontally.

Compared with the prior art, the utility model discloses a battery busbar welding equipment has the above-mentioned technical advantage that is used for busbar welded to compress tightly detection mechanism and possesses.

In addition, set up elevating system and translation mechanism in battery busbar welding equipment's frame, can drive the base plate and go up and down and the translation action, can not only fine realization compress tightly the action to the busbar, can compress tightly and welding operation through the translation to the busbar of different regions on the battery module moreover.

Drawings

The accompanying drawings, which form a part of the present disclosure, are provided to provide a further understanding of the present disclosure, and the exemplary embodiments and descriptions thereof are provided to explain the present disclosure, wherein the related terms in the front, back, up, down, and the like are only used to represent relative positional relationships, and do not constitute an undue limitation of the present disclosure. In the drawings:

fig. 1 is a schematic view of an overall structure of a pressing detection mechanism for bus bar welding disposed on a battery bus bar welding device according to a first embodiment of the present invention;

fig. 2 is a schematic perspective view of a pressing detection mechanism according to a first embodiment of the present invention;

fig. 3 is a schematic perspective view of a pressing detection mechanism at a lower viewing angle according to a first embodiment of the present invention;

fig. 4 is a top view of the pressing detection mechanism according to the first embodiment of the present invention;

fig. 5 is a schematic diagram illustrating a comparison between a natural state and a pressing state of the pressing detection mechanism according to the first embodiment of the present invention;

fig. 6 is a top view of a battery bus bar welding apparatus according to a second embodiment of the present invention;

fig. 7 is a schematic view of a matching structure of the pressing detection mechanism and the battery module according to the second embodiment of the present invention;

description of reference numerals:

1. a frame; 10. welding a platform; 11. a lifting mechanism; 12. a translation mechanism; 100. a servo motor;

2. a substrate; 20. a guide hole; 200. a connecting plate; 21. a first through hole; 22. a second through hole; 220. an inflation inlet;

3. pressing a nozzle; 30. a main body; 300. an inner cavity; 301. mounting a plate; 302. a nozzle; 31. a guide pin; 320. A compression spring; 33. mounting a bracket; 34. a displacement detecting device; 340. a detection head;

4. loading a tray;

5. a battery module; 500. a pole column; 501. a bus bar.

Detailed Description

It should be noted that, in the case of no conflict, the embodiments and features of the embodiments of the present invention may be combined with each other.

In the description of the present invention, it should be noted that if terms indicating directions or positional relationships such as "up", "down", "inside", "back", etc. appear, they are based on the directions or positional relationships shown in the drawings, and are only for convenience of description of the present invention and simplification of description, but do not indicate or imply that the device or element indicated must have a specific direction, be constructed and operated in a specific direction, and thus, should not be construed as limiting the present invention; the appearances of the terms "first," "second," and the like, if any, are also intended to be descriptive only and not for purposes of indicating or implying relative importance.

Furthermore, in the description of the present invention, the terms "mounted," "connected," and "connecting" are to be construed broadly unless expressly limited otherwise. For example, the connection may be a fixed connection, a detachable connection, or an integral connection; can be mechanically or electrically connected; either directly or indirectly through intervening media, or through both elements. To those of ordinary skill in the art, the specific meaning of the above terms in the present invention can be understood in combination with the specific situation.

The present invention will be described in detail below with reference to the accompanying drawings in conjunction with embodiments.

Example one

The utility model relates to a pressing detection mechanism for busbar welding, aiming at providing a pressing detection mechanism which can detect the pressing condition of a busbar 501 on a pole 500 and is beneficial to improving the welding quality of a battery busbar; one exemplary configuration of which is shown in fig. 1 and 2.

In general, the pressing detection mechanism is disposed on the battery bus bar welding equipment and can be driven to move up and down above the battery module 5. The pressing detection mechanism includes a base plate 2 made of an insulating material, and a pressing nozzle 3 and a displacement detection device 34 provided on the base plate 2. Moreover, the pressure nozzle 3 is arranged at the bottom of the base plate 2 in a way of moving up and down, and an elastic part is arranged between the pressure nozzle 3 and the base plate 2; the pressure nozzle 3 is pressed against the bus bar 501 of the battery module 5 under the action of the elastic piece, and an inner cavity 300 for providing a welding space is arranged on the pressure nozzle 3; the displacement detecting device 34 detects the amount of displacement of the pressure nozzle 3 with respect to the upward movement of the substrate 2.

The number of the pressure nozzles 3 on the substrate 2 can be flexibly selected, in the embodiment, a plurality of pressure nozzles 3 are arranged on the substrate 2 in an array manner, and each pressure nozzle 3 is provided with a displacement detection device 34; each of the pressure nozzles 3 corresponds to each of the plurality of bus bars 501 of the battery module 5. Set up multiunit pressure mouth 3 and displacement detection device 34 on base plate 2, can compress tightly a plurality of busbars 501 on the battery module 5 simultaneously, help promoting busbar 501's welding efficiency.

In order to ensure welding safety, the substrate 2 needs to be insulated and can be made of various materials with certain connection strength, and preferably, the substrate 2 is made of a glass fiber board, and the glass fiber board is used as the substrate 2, so that the insulating property is good, and the installation strength requirements of the pressure nozzle 3 and the displacement detection device 34 are met. Meanwhile, the base plate 2 of the present embodiment is attached by the connection plate 200 of the "T" shape and the driving mechanism for the reliability of the strength of the base plate 2 itself and the convenience of the table.

The displacement detecting device 34 can adopt the existing mature displacement detecting product, in this embodiment, the displacement detecting device 34 adopts a general-purpose contact displacement sensor, and the detecting head 340 of the general-purpose contact displacement sensor abuts against the pressure nozzle 3; adopt general type contact displacement sensor, through the displacement volume that shifts up of butt contact mode detection pressure mouth 3, have the installation configuration of being convenient for, and advantages such as detection performance stability. At this moment, the substrate 2 is provided with a first through hole 21 and a mounting bracket 33 positioned above the first through hole 21; the general contact type displacement sensor is installed on the installation bracket 33, and the detection head 340 penetrates through the first through hole 21 and abuts against the top of the pressure nozzle 3. Mounting the general-purpose type contact displacement sensor above the base plate 2 facilitates providing a sufficient arrangement space for the pressure nozzle 3 below the base plate 2.

As for the specific structure of the pressure nozzle 3, it can be designed flexibly, and preferably, as shown in fig. 2 in combination with fig. 3 and 4, the pressure nozzle 3 of the present embodiment includes a mounting plate 301 and a main body 30 provided on the mounting plate 301, and the mounting plate 301 is provided on the base plate 2 so as to be vertically movable by guiding a plurality of guide pins 31. The mounting plate 301 is provided for the pressure nozzle 3 to facilitate the installation of the main body 30 on the mounting plate 301, and the main body 30 is provided to be guided vertically on the base plate 2 by a plurality of guide pins 31 connected to the mounting plate 301.

In addition, the base plate 2 is provided with a guide hole 20 for the guide pin 31 to penetrate through, and the bottom end of the guide pin 31 is fixedly connected with the mounting plate 301; with this arrangement, the elastic member is preferably a compression spring 320, the compression spring 320 is sleeved on the guide pin 31, and both ends of the compression spring 320 abut against the base plate 2 and the mounting plate 301 respectively. The elastic part adopts a compression spring 320, and the compression spring 320 is sleeved on the guide pin 31 capable of moving up and down, so that an elastic pretightening force is provided for the mounting plate 301, the mounting configuration is convenient, and the overall performance is stable and reliable.

Meanwhile, the top of the inner cavity 300 is open, the bottom of the pressure nozzle 3 is provided with a nozzle 302 for exposing the bus bar 501 in the inner cavity 300, and the substrate 2 is provided with a second through hole 22 corresponding to the inner cavity 300. Thus, the welding of the bus bar 501 and the pole 500 is completed by the ray for facilitating the welding tool or the laser welding through the inner cavity 300, providing a good welding space.

In addition, as shown in fig. 4, a gas filling port 220 for filling the protection gas into the inner cavity 300 is provided at one side of the second through hole 22. The arrangement of the inflation inlet 220 facilitates the supplement of inert shielding gas into the inner cavity 300, thereby providing safety protection for welding and facilitating the improvement of the safety of welding operation.

In the process of pressing the bus bar 501, as shown in fig. 5, when the substrate 2 moves downward to perform the pressing operation, as shown in fig. 5 (a), the pressing nozzle 3 is in a natural state, and is pressed by the elastic force of the compression spring 320, the top of the gas filling port 220 falls on the upper surface of the substrate 2, and the detection head 340 is at the lowest position. When the pressing action is performed, the main body 30 contacts with the bus bars 501 and moves upwards relative to the substrate 2, and the compression springs 320 are pressed, so that each bus bar 501 can be tightly pressed on the pole 500 under the elastic force of the compression springs 320; in this process, the main body 30 drives the mounting plate 301 to move upward, and the top pressure detection head 340 moves upward, so that the universal contact type displacement sensor obtains a signal of displacement change. Using the hooke's law equation f-Kx (K: spring coefficient, x: displacement data), the pressing force applied by the main body 30 on the busbar 501, i.e., the pressing force between the busbar 501 and the pole 500, can be calculated. When the pressing force meets the process requirements, the downward movement of the substrate 2 can be stopped, and then the welding operation is performed. If the displacement data are abnormal in the compressing process, the alarm can be given through the control unit or the alarm device so as to stop the machine in time to process the abnormal condition.

In summary, in the pressing detection mechanism for bus bar welding of the present embodiment, the pressing nozzle 3 and the displacement detection device 34 are disposed on the substrate 2, and a downward elastic pre-tightening force is applied to the pressing nozzle 3 by the elastic member, so that during the process of pressing the bus bar 501 downwards by the substrate 2, the elastic member can overcome the pressing stroke deviation caused by the thickness of the bus bar 501 or the height error of the terminal 500, so that all the bus bars 501 can be pressed on the terminal 500; the displacement detecting device 34 is used for detecting the upward displacement of the pressure nozzle 3 relative to the substrate 2, so that the force exerted on the pressure nozzle 3 by the elastic member can be calculated, and the pressing force exerted on the bus bar 501 by the pressure nozzle 3 can be estimated, and therefore the pressing detecting mechanism capable of detecting the pressing condition of the bus bar 501 on the pole 500 is provided, and the welding quality of the battery bus bar can be improved.

Example two

The utility model relates to a battery busbar welding device, which adopts a compression detection mechanism for busbar welding provided by the first embodiment; an exemplary structure of which is shown in fig. 6 and 7. The battery bus bar welding equipment adopting the pressing detection mechanism has the technical advantages of the pressing detection mechanism for bus bar welding in the first embodiment.

Further, as shown in fig. 6 in conjunction with fig. 1, the substrate 2 of the present embodiment has an elevating mechanism 11 for driving the substrate 2 to move up and down, and a translation mechanism 12 for driving the elevating mechanism 11 to move horizontally. The elevating mechanism 11 and the translating mechanism 12 are preferably driven by a servo motor 100. The frame 1 of the battery busbar welding equipment is provided with a welding platform 10, and the lifting mechanism 11 and the translation mechanism 12 are both arranged on the welding platform 10. The loading tray 4 carrying the battery module 5 is also placed on the welding stage 10.

The lifting mechanism 11 and the translation mechanism 12 are arranged on the rack 1 of the battery busbar welding equipment, and can drive the substrate 2 to lift and translate, so that the busbar 501 can be well pressed, and the busbar 501 in different areas on the battery module 5 can be pressed and welded through translation.

According to the battery busbar welding equipment, the pressing detection mechanism for busbar welding is arranged, so that the structure is simple, and the measured data is reliable; the space utilization rate of the pressing detection mechanism is high, and the pressing condition of each pressing nozzle 3 can be monitored

The above description is only a preferred embodiment of the present invention, and should not be taken as limiting the invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A pressing detection mechanism for bus bar welding is arranged on battery bus bar welding equipment and can be driven to move up and down above a battery module (5); the method is characterized in that:

the pressing detection mechanism comprises a substrate (2) made of an insulating material, and a pressure nozzle (3) and a displacement detection device (34) which are arranged on the substrate (2);

the pressing nozzle (3) is arranged at the bottom of the base plate (2) in a vertically movable mode, an elastic piece is arranged between the pressing nozzle (3) and the base plate (2), the pressing nozzle (3) is pressed against a bus bar (501) of the battery module (5) under the action of the elastic piece, and an inner cavity (300) used for providing a welding space is formed in the pressing nozzle (3);

the displacement detection device (34) is used for detecting the displacement of the pressure nozzle (3) relative to the upward movement of the base plate (2).

2. The pressing detection mechanism for bus bar welding according to claim 1, characterized in that:

a plurality of pressure nozzles (3) are arrayed on the substrate (2), and each pressure nozzle (3) is provided with one displacement detection device (34);

each of the pressure nozzles (3) corresponds to each of the plurality of bus bars (501) on the battery module (5).

3. The pressing detection mechanism for bus bar welding according to claim 1, characterized in that:

the displacement detection device (34) adopts a universal contact type displacement sensor, and a detection head (340) of the universal contact type displacement sensor is abutted against the pressure nozzle (3); and/or the presence of a gas in the gas,

the substrate (2) is a glass fiber plate.

4. The pressing detection mechanism for bus bar welding according to claim 3, characterized in that:

the substrate (2) is provided with a first through hole (21) and a mounting bracket (33) positioned above the first through hole (21);

the universal contact type displacement sensor is arranged on the mounting bracket (33), and the detection head (340) penetrates through the first through hole (21) and abuts against the top of the pressure nozzle (3).

5. The pressing detection mechanism for bus bar welding according to any one of claims 1 to 4, characterized in that:

the pressure nozzle (3) comprises a mounting plate (301) and a main body (30) arranged on the mounting plate (301), wherein the mounting plate (301) is arranged on the substrate (2) in a vertically guiding and moving mode through a plurality of guide pins (31).

6. The pressing detection mechanism for bus bar welding according to claim 5, characterized in that:

the base plate (2) is provided with a guide hole (20) for the guide pin (31) to penetrate through, and the bottom end of the guide pin (31) is fixedly connected with the mounting plate (301);

the elastic piece is a compression spring (320) sleeved on the guide pin (31), and two ends of the compression spring (320) are respectively abutted to the base plate (2) and the mounting plate (301).

7. The pressing detection mechanism for bus bar welding according to claim 6, characterized in that:

the top of the inner cavity (300) is open, the bottom of the pressure nozzle (3) is provided with a nozzle (302) which enables the bus bar (501) to be exposed in the inner cavity (300), and the substrate (2) is provided with a second through hole (22) corresponding to the inner cavity (300).

8. The pressing detection mechanism for bus bar welding according to claim 7, characterized in that:

and an inflation inlet (220) for filling protective gas into the inner cavity (300) is formed in one side of the second through hole (22).

9. The utility model provides a battery busbar welding equipment which characterized in that:

the battery bus bar welding apparatus employs the pressing detection mechanism for bus bar welding of any one of claims 1 to 8.

10. The battery bus bar welding apparatus of claim 9, wherein:

the base plate (2) is provided with a lifting mechanism (11) for driving the base plate (2) to move up and down, and a translation mechanism (12) for driving the lifting mechanism (11) to move horizontally.