CN111276750A

CN111276750A - Battery manufacturing apparatus and control method thereof

Info

Publication number: CN111276750A
Application number: CN201811477897.1A
Authority: CN
Inventors: 不公告发明人
Original assignee: Wuxi Lead Intelligent Equipment Co Ltd
Current assignee: Wuxi Lead Intelligent Equipment Co Ltd
Priority date: 2018-12-05
Filing date: 2018-12-05
Publication date: 2020-06-12
Anticipated expiration: 2038-12-05
Also published as: CN111276750B

Abstract

The application provides a battery manufacturing device and a control method thereof, wherein the battery manufacturing device comprises a welding mechanism, a rubberizing mechanism, a first sensor and a second sensor, the welding mechanism is used for welding a tab on a pole piece, and the position corresponding to the welding mechanism is a welding station; the rubberizing mechanism is used for gluing pole piece glue and pole lug glue, and the position corresponding to the rubberizing mechanism is a rubberizing station; the method comprises the steps that a first sensor detects whether a pole piece entering a welding station is a bad pole piece; the second sensor detects whether the pole piece entering the rubberizing station is a bad pole piece; the controller is respectively and electrically connected with the welding mechanism, the rubberizing mechanism, the first sensor and the second sensor, receives detection results of the first sensor and the second sensor, and respectively controls the welding mechanism and the rubberizing mechanism according to the detection results. In this application, through control welding mechanism and rubberizing mechanism not carrying out utmost point ear welding and rubberizing to bad pole piece, avoided the waste of material, be favorable to reducing manufacturing cost.

Description

Battery manufacturing apparatus and control method thereof

Technical Field

The present disclosure relates to a battery manufacturing apparatus and a control method thereof.

Background

In the manufacturing process of the lithium battery, the procedures of welding the pole lug, pasting pole piece glue, pole lug glue, winding and the like are sequentially carried out on the pole piece after the pole piece is formed, if the pole piece is poor, the pole lug is welded and glued in the normal procedure, and the pole lug welded on the poor pole piece and the protective glue pasted on the poor pole piece are discarded as waste together with the poor pole piece. Obviously, this results in a waste of material and energy. If manual intervention is carried out through shutdown, bad pole pieces are removed, the problems that statistics calculation is wrong after belt breakage, materials are different in size due to belt connection and the like are easily caused, and meanwhile, the time cost and the labor cost are increased.

Disclosure of Invention

Provided are a battery manufacturing apparatus and a control method thereof that reduce costs.

The application provides a battery manufacturing device, which is used for manufacturing a battery, wherein the battery comprises a pole piece, the battery manufacturing device comprises a welding mechanism, a gluing mechanism, a first sensor and a second sensor, the welding mechanism is used for welding a pole lug on the pole piece, and the position corresponding to the welding mechanism is a welding station; the rubberizing mechanism is used for gluing pole piece glue and pole lug glue, and the position corresponding to the rubberizing mechanism is a rubberizing station; the method comprises the steps that a first sensor detects whether a pole piece entering a welding station is a bad pole piece; the second sensor detects whether the pole piece entering the rubberizing station is a bad pole piece; the controller is respectively and electrically connected with the welding mechanism, the rubberizing mechanism, the first sensor and the second sensor, receives detection results of the first sensor and the second sensor, and respectively controls the welding mechanism and the rubberizing mechanism according to the detection results.

Further, the first sensor comprises at least one of a CCD sensor, a color sensor and an optical fiber sensor, and is used for detecting whether the pole piece entering the welding station is a bad pole piece; the second sensor comprises at least one of a photoelectric switch sensor, a correlation optical fiber sensor and a proximity switch sensor and is used for detecting whether a pole piece entering the rubberizing station has a pole lug or not.

Further, the bad pole piece is provided with a bad mark, the first sensor confirms that the current pole piece is the bad pole piece after detecting the bad mark, and the distance between the first sensor and the welding station is not less than the distance between the bad mark and the preset position of the pole lug.

Further, rubberizing mechanism is including being used for pasting the gluey pole piece head rubberizing mechanism of pole piece head and being used for pasting the gluey pole piece afterbody rubberizing mechanism of pole piece afterbody, and the position that pole piece head rubberizing mechanism and pole piece afterbody rubberizing mechanism correspond is pole piece head rubberizing station and pole piece afterbody rubberizing station respectively, battery manufacturing equipment includes two at least second sensors, and the front side of pole piece head rubberizing station is located to at least one second sensor, and the rear side of pole piece afterbody rubberizing station is located to at least one second sensor.

Furthermore, the distance between the second sensor arranged on the front side of the pole piece head rubberizing station and the pole piece head rubberizing station is not greater than the length of a single pole piece, and the distance between the second sensor arranged on the rear side of the pole piece tail rubberizing station and the pole piece tail rubberizing station is not greater than the preset distance between the pole lug and the pole piece tail rubberizing station.

Furthermore, rubberizing mechanism includes utmost point ear rubberizing mechanism, battery manufacturing equipment includes at least three second sensor, utmost point ear rubberizing mechanism corresponds the position for utmost point ear rubberizing station, and the front side of utmost point ear rubberizing station is located to at least one second sensor.

Furthermore, the battery manufacturing equipment comprises an auxiliary rubberizing mechanism and a third sensor, the auxiliary rubberizing mechanism carries out auxiliary rubberizing on the pole piece, the position corresponding to the auxiliary rubberizing mechanism is an auxiliary rubberizing station, and the third sensor is electrically connected with the controller and detects whether the pole piece entering the auxiliary rubberizing station is a bad pole piece.

The present application also provides a control method of a battery manufacturing apparatus for the battery manufacturing apparatus as described above, the control method including: controlling a first sensor to detect whether a pole piece entering a welding station is a bad pole piece; when a bad pole piece is detected, the welding mechanism is controlled not to weld the pole lug; controlling a second sensor to detect whether the pole piece entering the rubberizing station is a bad pole piece; and when a bad pole piece is detected, controlling the adhesive sticking mechanism not to stick adhesive.

Further, when detecting bad pole piece, control rubberizing mechanism does not carry out the rubberizing, include: and when the second sensor does not detect the tab, judging that the current pole piece is a bad pole piece, and controlling the rubberizing mechanism not to rubberize after the pole piece advances for a preset distance.

Further, the preset distance is the sum or difference of a first distance and a second distance, wherein the first distance is the preset distance between the tab and the pole piece glue, and the second distance is the distance between the second sensor and the gluing station.

In this application, whether the pole piece that gets into the welding station through first sensor detection is bad pole piece, whether the pole piece that gets into the rubberizing station through second sensor detection is bad pole piece to control welding mechanism and rubberizing mechanism do not carry out utmost point ear welding and rubberizing to bad pole piece, avoided the waste of material, be favorable to reducing manufacturing cost.

Drawings

FIG. 1 is a schematic structural diagram of a positive electrode of a battery, including a pole piece, a pole tab, a pole piece adhesive and a pole tab adhesive;

FIG. 2 is a schematic structural diagram of a pole piece, a pole tab, a pole piece adhesive and a pole tab adhesive of a battery negative electrode;

FIG. 3 is a schematic structural view of a negative electrode plate;

FIG. 4 is a schematic block diagram of one embodiment of the battery manufacturing apparatus of the present application;

FIG. 5 is a schematic view showing the construction of the battery manufacturing apparatus shown in FIG. 4;

FIG. 6 is a schematic flow chart diagram illustrating an embodiment of a method for controlling a battery manufacturing apparatus according to the present application;

FIG. 7 is a schematic view showing a state in which a pole piece is about to enter a pole piece tail rubberizing station;

fig. 8 is a schematic view showing a state that a pole piece is about to enter a pole piece head rubberizing station.

Detailed Description

Reference will now be made in detail to the exemplary embodiments, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, like numbers in different drawings represent the same or similar elements unless otherwise indicated. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present application. Rather, they are merely examples of apparatus consistent with certain aspects of the present application, as detailed in the appended claims.

The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. Unless defined otherwise, technical or scientific terms used herein shall have the ordinary meaning as understood by one of ordinary skill in the art to which this invention belongs. The use of "first," "second," and similar terms in the description and in the claims does not indicate any order, quantity, or importance, but rather is used to distinguish one element from another. Also, the use of the terms "a" or "an" and the like do not denote a limitation of quantity, but rather denote the presence of at least one. "plurality" or "a number" means two or more. The word "comprising" or "comprises", and the like, means that the element or item listed as preceding "comprising" or "includes" covers the element or item listed as following "comprising" or "includes" and its equivalents, and does not exclude other elements or items. The terms "connected" or "coupled" and the like are not restricted to physical or mechanical connections, but may include electrical connections, whether direct or indirect. As used in this specification and the appended claims, the singular forms "a", "an", and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It should also be understood that the term "and/or" as used herein refers to and encompasses any and all possible combinations of one or more of the associated listed items.

As shown in fig. 1, the positive electrode structure of the battery includes a pole piece 11, a tab 12 welded to the pole piece, a pole piece glue 13 adhered to the pole piece, a tab glue 14 adhered to the tab, and a sealant 15, wherein the pole piece glue 13 includes a pole piece head glue 132 and a pole piece tail glue 131, and the pole piece head glue 132 and the pole piece tail glue 131 are adhered to two end regions of the pole piece, respectively. Referring to fig. 2, the negative electrode structure of the battery is similar to the positive electrode structure, and the negative electrode structure includes a pole piece 11A, a tab 12A welded to the pole piece, a pole piece glue 13A adhered to the pole piece, a tab glue 14A adhered to the tab, and a sealant 15A, and is different from the positive electrode structure only in that the pole piece glue 13A is a pole piece head glue, and does not include a pole piece tail glue. A complete pole piece is formed between the two cutting lines L (or the cutting line L1).

Referring to fig. 4, the battery manufacturing apparatus is used for manufacturing a battery, and includes a welding mechanism 2, a gluing mechanism 3, a first sensor 4, a second sensor 5, and a controller 6, where the welding mechanism 2 is used to weld a tab 12 on a pole piece 11, and a position corresponding to the welding mechanism 2 is a welding station a; the rubberizing mechanism 3 is used for pasting a pole piece glue 13 and a pole lug glue 14, and the corresponding position of the rubberizing mechanism 3 is a rubberizing station; the first sensor 4 detects whether the pole piece entering the welding station A is a bad pole piece; the second sensor 5 detects whether the pole piece entering the rubberizing station is a bad pole piece; and the controller 6 is electrically connected with the welding mechanism 2, the adhesive tape sticking mechanism 3, the first sensor 4 and the second sensor 5 respectively, and the controller 6 receives the detection results of the first sensor 4 and the second sensor 5 and controls the welding mechanism 2 and the adhesive tape sticking mechanism 3 respectively according to the detection results. If the first sensor 4 or the second sensor 5 detects that the current pole piece is a bad pole piece, controlling the welding mechanism 2 not to weld or controlling the rubberizing mechanism 3 not to rubberize; and if the bad pole piece is not detected, controlling the welding mechanism 2 to carry out tab welding or controlling the rubberizing mechanism 3 to carry out rubberizing. Of course, when the bad pole pieces are detected, the user can be reminded to adjust the previous process so as to avoid forming a large batch of bad pole pieces.

Of course, the battery manufacturing apparatus further includes a stirring mechanism, a coating mechanism, a rolling mechanism, a slitting mechanism, a baking mechanism, a winding mechanism, and a liquid injection mechanism, which will not be described in this embodiment.

Referring to fig. 5, the first sensor 4, the welding mechanism 2, and the gluing mechanism 3 are arranged along the advancing direction of the pole piece 11, which is indicated by an arrow.

In this embodiment, the number of the first sensors 4 is two, and the first sensors detect the upper and lower surfaces of the pole piece respectively. The first sensor 4 is at least one of a CCD sensor, a color sensor and a fiber sensor, for example, and the bad pole piece 11 has a bad mark 10 thereon for recording that the pole piece is a bad pole piece (as shown in fig. 3). The color of the bad mark is red, for example, and the red bad mark 10 can be detected by the color sensor (i.e. the first sensor 4) to determine whether the pole piece 11 entering the welding station is a bad pole piece, wherein "entering" is understood to include "entering" and "about to enter" and the like.

The distance between the first sensor 4 and the welding station a is not less than the distance between the bad mark 10 and the preset position of the tab 12 (i.e. the position of the tab 12 of the qualified product), in other embodiments, the position of the first sensor 4 may not be limited, as long as the detection of the pole piece 11 is completed before the pole piece enters the welding station. For example, the distance between the detection area of the first sensor 4 and the welding station a is not less than the distance between the bad mark 10 and the preset position of the tab 12, so that the pole piece 11 can complete the bad detection before entering the welding station, and whether the pole piece is a bad pole piece is determined.

The controller 6 receives the detection results of the first sensors 4, and when any one of the first sensors 4 detects that the pole piece is a bad pole piece, the controller 6 controls the welding mechanism 2 not to work, namely, the pole lug of the bad pole piece is not welded; if no defective pole piece is detected, the controller 6 controls the welding mechanism 2 to weld the tab 12. The pole piece 11 is driven by a conveyor belt (not shown) to continue its advance regardless of whether tab welding is performed.

The rubberizing mechanism 3 comprises a pole piece tail rubberizing mechanism 31, a pole piece head rubberizing mechanism 32 and a pole lug rubberizing mechanism 33, the pole piece tail rubberizing mechanism 31 and the pole piece head rubberizing mechanism 32 are respectively used for pasting pole piece tail glue 131 and pole piece head glue 132, and the pole lug rubberizing mechanism 33 is used for pasting pole lug glue 14. The positions corresponding to the pole piece tail rubberizing mechanism 31, the pole piece head rubberizing mechanism 32 and the pole lug rubberizing mechanism 33 are a pole piece tail rubberizing station B, a pole piece head rubberizing station C and a pole lug rubberizing station D, that is, the pole piece tail rubberizing mechanism 31, the pole piece head rubberizing mechanism 32 and the pole lug rubberizing mechanism 33 respectively glue the pole piece tail glue 131, the pole piece head glue 132 and the pole lug glue 14 at the pole piece tail rubberizing station B, the pole piece head rubberizing station C and the pole lug rubberizing station D.

In this embodiment, the tail adhesive 131, the head adhesive 132 and the tab adhesive 14 of the pole piece are sequentially pasted to the pole piece, that is, the tail adhesive pasting station B, the head adhesive pasting station C and the tab adhesive pasting station D of the pole piece are sequentially arranged along the advancing direction of the pole piece 11. The battery manufacturing apparatus includes a plurality of

second sensors

5, 3 in the present embodiment, which are

second sensors

5A, 5B, 5C, respectively. The second sensor may be at least one of an opto-electronic switch sensor, a correlation fiber sensor, and a proximity switch sensor, for example, for detecting whether the pole piece entering the taping station has the tab 12. If the pole lug is not detected, the welding mechanism is indicated to be not welded, and the pole piece is deduced to be a bad pole piece. Of course, the second sensor may also be configured similarly to the first sensor, i.e. to directly detect the presence or absence of a faulty label. Whether or not welding is performed, the pole piece 11 is driven by a conveyor belt (not shown) to advance toward the pole piece tail rubberizing station B.

The second sensor 5A is disposed at the rear side (or downstream) of the pole piece tail rubberizing station B (or the pole piece tail rubberizing mechanism 31) and is configured to detect whether a pole tab is welded to the pole piece entering the pole piece tail rubberizing station B. The distance y1 between the second sensor 5A and the pole piece tail rubberizing station B is not greater than the preset distance x1 (refer to fig. 7) between the tab and the pole piece tail rubberizing station B, and certainly, the distance between the detection area of the second sensor 5A and the pole piece tail rubberizing station B is not greater than the preset distance x1 between the tab and the pole piece tail rubberizing station B, that is, before reaching the pole piece tail rubberizing station B, it is only required to detect whether the tab is welded on the pole piece. If the tab is not detected, the current pole piece is judged to be a bad pole piece, and the controller 6 receives the detection result and controls the gluing mechanism 31 at the tail of the pole piece not to glue; if the tab is detected, the current pole piece is judged to be a qualified pole piece, and the controller controls the pole piece tail rubberizing mechanism 31 to rubberize. Whether the pole piece tail glue 131 is pasted or not, the pole piece 11 is driven by a conveyor belt (not shown) to advance towards the pole piece head gluing station C.

The second sensor 5B is arranged at the front side (or upstream) of the pole piece head rubberizing station C (or the pole piece head rubberizing mechanism 32) and used for detecting whether the pole piece entering the pole piece head rubberizing station C is welded with a tab, wherein the distance between the second sensor 5B and the pole piece head rubberizing station C is not greater than the length of a single pole piece, and certainly, the distance between the detection area of the second sensor 5B and the pole piece tail rubberizing station C can be not greater than the length of a single pole piece, so as to ensure that before reaching the pole piece head rubberizing station C, whether the tab is welded on each pole piece can be detected. If the tab is not detected, the current pole piece is judged to be a bad pole piece, and the controller 6 receives the detection result and controls the pole piece head rubberizing mechanism 32 not to perform rubberizing; if the pole lug is detected, the current pole piece is judged to be a qualified pole piece, and the controller controls the pole piece head rubberizing mechanism 32 to rubberize. Whether or not the pole piece head paste 132 is applied, the pole piece 11 is advanced toward the tab pasting station D by a conveyor (not shown).

The second sensor 5C is arranged at the front side of the tab rubberizing station D (or the tab rubberizing mechanism 33) and used for detecting whether a tab is welded on a pole piece entering the tab rubberizing station D, wherein the distance between the second sensor 5C and the tab rubberizing station D is not greater than the length of a single pole piece, and certainly, the distance between the detection area of the second sensor 5C and the tab rubberizing station D is not greater than the length of a single pole piece, so that before reaching the tab rubberizing station D, whether a tab is welded on each pole piece can be detected. If the tab is not detected, judging that the current pole piece is a bad pole piece, and receiving the detection result and controlling the tab rubberizing mechanism 33 not to perform rubberizing by the controller 6; if the tab is detected, the current pole piece is judged to be a qualified pole piece, and the controller 6 controls the tab rubberizing mechanism 33 to rubberize. The pole piece 11 is advanced by a conveyor belt (not shown) whether or not the tab paste 14 is applied.

Because the poor pole piece is not subjected to pole lug welding and rubberizing, the time (welding time and rubberizing time) is saved while the material waste is avoided, the continuity of the welding process and the rubberizing process is not influenced, and the manufacturing cost is favorably reduced.

Of course, the above-mentioned processes (or the corresponding stations) can be changed or adjusted according to the requirements.

In one embodiment, the battery manufacturing apparatus further includes an auxiliary gluing mechanism 7 and a third sensor 8, the auxiliary gluing mechanism 7 performs auxiliary gluing on the pole piece (for example, auxiliary glue except for the pole lug glue and the head glue of the pole piece and the tail glue of the pole piece), the position corresponding to the auxiliary gluing mechanism 7 is an auxiliary gluing station E, and the auxiliary gluing station E can adjust the installation position as required, and may be located downstream of the pole lug gluing station D, for example. And the third sensor 8 is electrically connected with the controller 6 and detects whether the pole piece entering the auxiliary rubberizing station E is a bad pole piece. Optionally, the third sensor 8 may be disposed on the front side or the rear side of the auxiliary gluing station E, and when the auxiliary glue is close to the head glue of the pole piece, the third sensor is disposed according to the method of the head glue of the pole piece, and when the auxiliary glue is close to the tail glue of the pole piece, the third sensor 8 is disposed on the front side or the rear side of the auxiliary gluing station E, and is respectively configured to detect whether the tab is present.

The above embodiment mainly describes the welding of the tab 12 to the positive electrode tab 11 and the rubberizing of the tab 11 and the tab 12. The welding of the tab 12A of the negative electrode tab 11A and the gluing process of the tab and the tab are similar to those of the positive electrode tab 11, except that the negative electrode tab does not need to be glued with the tail glue of the tab, and other parts that are the same please refer to the above embodiments, which will not be described in detail herein.

Referring to fig. 6, the present application further provides a method for controlling a battery manufacturing apparatus, which is used in the battery manufacturing apparatus in the foregoing embodiments, and includes:

s1, controlling the first sensor 4 to detect whether the pole piece entering the welding station A is a bad pole piece;

optionally, whether the pole piece is a poor pole piece is determined, for example, by detecting whether the pole piece has a poor mark, and the specific determination process is as described above.

S2, when a bad pole piece is detected, controlling the welding mechanism 2 not to weld the pole ear;

s3, controlling the second sensor 5 to detect whether the pole piece entering the rubberizing station is a bad pole piece;

optionally, the rubberizing station includes a pole piece tail rubberizing station B, a pole piece head rubberizing station C, and a tab rubberizing station D, which are respectively used for pasting the pole piece tail glue 131, the pole piece head glue 132, and the tab glue 14. Whether the pole piece is a poor pole piece or not can be judged by detecting whether the pole piece is provided with the pole lug or not, and the specific judgment process is as described above.

Please refer to fig. 7 and 8, in which the pole piece moves from right to left (the moving direction in fig. 4 and 5 is from left to right). It should be noted that, when the pole piece is a poor pole piece, the tab 12, the tab tail glue 131, and the tab head glue 132 in fig. 7 and 8 do not exist, and the tab 12, the tab tail glue 131, and the tab head glue 132 shown in the figures are only intended to show their respective preset positions. When the second sensor 5A at the rear side of the pole piece tail rubberizing station B detects that the preset position of the pole lug (where the pole lug 12 is located in the figure) has no pole lug, the controller 6 controls the pole piece tail rubberizing mechanism 31 (corresponding to the pole piece tail rubberizing station B) to not rubberize after the pole piece advances for a preset distance (or after the pole piece advances for a preset time). The preset distance is the difference between a preset distance x1 between the pole piece tail glue 131 and the tab 12 (the distance between the pole piece tail glue 131 and the tab 12 of a qualified product, the same below) and a distance y1 between the second sensor 5A and the pole piece tail gluing station B, namely the preset distance is x1-y 1; when the second sensor 5B in front of the pole piece head station C detects that there is no pole tab at the preset position of the pole tab position, the controller 6 controls the pole piece head rubberizing mechanism 32 not to rubberize after the pole piece advances for a preset distance (or after the pole piece advances for a preset time), where the preset distance is the sum of a preset distance x2 (the distance between the pole piece head glue and the pole tab of a qualified product) of the pole piece head glue and a distance y2 between the second sensor 5B and the pole piece head rubberizing station C, that is, the preset distance is x2+ y 2. The method for judging that the tab glue 12 is not pasted is similar to the pole piece head glue 132.

And S4, controlling the gluing mechanism 3 not to glue when a bad pole piece is detected.

Of course, the above steps can be changed in sequence or increased or decreased according to the requirement. Optionally, the bad pole pieces can be removed at a subsequent winding station.

In this application, whether the pole piece that will get into the welding station through first sensor detection is bad pole piece, whether the pole piece that detects to get into the rubberizing station through the second sensor is bad pole piece to control welding mechanism and rubberizing mechanism and do not carry out utmost point ear welding and rubberizing to bad pole piece, avoided the waste of material, be favorable to reducing manufacturing cost.

The above description is only exemplary of the present application and should not be taken as limiting the present application, as any modification, equivalent replacement, or improvement made within the spirit and principle of the present application should be included in the scope of protection of the present application.

Claims

1. A battery manufacturing apparatus for manufacturing a battery including a pole piece, the battery manufacturing apparatus comprising:

the welding mechanism is used for welding the lug on the pole piece, and the position corresponding to the welding mechanism is a welding station;

the rubberizing mechanism is used for gluing pole piece glue and pole lug glue, and the position corresponding to the rubberizing mechanism is a rubberizing station;

the first sensor is used for detecting whether the pole piece entering the welding station is a bad pole piece;

the second sensor is used for detecting whether the pole piece entering the rubberizing station is a bad pole piece;

and the controller is electrically connected with the welding mechanism, the adhesive tape sticking mechanism, the first sensor and the second sensor respectively, receives the detection results of the first sensor and the second sensor, and controls the welding mechanism and the adhesive tape sticking mechanism respectively according to the detection results.

2. The battery manufacturing apparatus according to claim 1, wherein: the first sensor comprises at least one of a CCD sensor, a color sensor and an optical fiber sensor and is used for detecting whether a pole piece entering a welding station is a bad pole piece; the second sensor comprises at least one of a photoelectric switch sensor, a correlation optical fiber sensor and a proximity switch sensor and is used for detecting whether a pole piece entering the rubberizing station has a pole lug or not.

3. The battery manufacturing apparatus according to claim 1, wherein: the welding device is characterized in that a bad mark is arranged on the bad pole piece, the first sensor confirms that the current pole piece is the bad pole piece after detecting the bad mark, and the distance between the first sensor and the welding station is not less than the distance between the bad mark and the preset position of the pole lug.

4. The battery manufacturing apparatus according to claim 1, wherein: the battery manufacturing equipment comprises at least two second sensors, wherein the front side of the pole piece head rubberizing station is arranged on at least one second sensor, and the rear side of the pole piece tail rubberizing station is arranged on at least one second sensor.

5. The battery manufacturing apparatus according to claim 4, wherein: the distance between the second sensor arranged on the front side of the pole piece head rubberizing station and the pole piece head rubberizing station is not greater than the length of a single pole piece, and the distance between the second sensor arranged on the rear side of the pole piece tail rubberizing station and the pole piece tail rubberizing station is not greater than the preset distance between the pole lug and the pole piece tail rubberizing station.

6. The battery manufacturing apparatus according to claim 4, wherein: the battery manufacturing equipment comprises at least three second sensors, the position corresponding to the tab rubberizing mechanism is a tab rubberizing station, and the front side of the tab rubberizing station is arranged on at least one second sensor.

7. The battery manufacturing apparatus according to claim 1, wherein: the battery manufacturing equipment comprises an auxiliary rubberizing mechanism and a third sensor, the auxiliary rubberizing mechanism carries out auxiliary rubberizing on the pole piece, the position corresponding to the auxiliary rubberizing mechanism is an auxiliary rubberizing station, and the third sensor is electrically connected with the controller and detects whether the pole piece entering the auxiliary rubberizing station is a bad pole piece.

8. A control method of a battery manufacturing apparatus for the battery manufacturing apparatus according to any one of claims 1 to 7, characterized by comprising:

controlling a first sensor to detect whether a pole piece entering a welding station is a bad pole piece;

when a bad pole piece is detected, the welding mechanism is controlled not to weld the pole lug;

controlling a second sensor to detect whether the pole piece entering the rubberizing station is a bad pole piece;

and when a bad pole piece is detected, controlling the adhesive sticking mechanism not to stick adhesive.

9. The control method of a battery manufacturing apparatus according to claim 8, characterized in that: when detecting bad pole piece, control rubberizing mechanism does not carry out the rubberizing, include:

and when the second sensor does not detect the tab, judging that the current pole piece is a bad pole piece, and controlling the rubberizing mechanism not to rubberize after the pole piece advances for a preset distance.

10. The control method of a battery manufacturing apparatus according to claim 9, characterized in that: the preset distance is the sum or difference of a first distance and a second distance, wherein the first distance is the preset distance between the tab and the pole piece glue, and the second distance is the distance between the second sensor and the gluing station.