Method and system for judging plate group conformity before cast welding of lead-acid storage battery

Abstract

The invention relates to the technical field of lead-acid storage batteries, in particular to a lead-acid storage battery plate group conformity judgment method and system before cast welding, and the method comprises the following steps: laminating a single encapsulated negative plate and a single unencapsulated positive plate, and forming a single plate group after lamination for preset times; the plate group is conveyed to a specified detection station through the track; at a specified detection station, applying an electric signal to the plate lug position of each polar plate in the polar group, downwards contacting the plate lug through a pressure sensor, and synchronously transmitting a pressure sensor signal and the electric signal to a control system; the control system carries out conformity judgment according to the pressure sensor signals and the electric signals at the specified positions in the same plate group; and if the conformity of a certain plate group is judged to be qualified, entering a cast welding process, otherwise, directly rejecting the plate group. According to the invention, the defects of the polar group can be automatically detected, the labor cost is reduced, and the detection efficiency and reliability are improved.

Description

Technical Field

[0001] The present invention relates to the technical field of lead-acid batteries, and more specifically to a method and system for determining the conformity of a lead-acid battery pole group before cast welding. Background Art

[0002] The pole groups for lead-acid battery casting and welding are manufactured in the assembly process. This process uses a partition to separate the positive and negative plates and stack them in a predetermined order. After assembly, the positive and negative plates of the pole group are completely isolated by the partition. Due to equipment failure, plate adhesion, plate paper falling, etc., some pole groups may have problems such as fewer pieces, more pieces, not stacked in the specified order, and uneven packaging causing short circuits of positive and negative plates. At present, most manufacturers usually add personnel to conduct special inspections after packaging and assembly to ensure that the pole groups do not have the above problems. This not only increases labor costs, but also often leads to missed inspections, posing serious quality risks. Summary of the invention

[0003] In view of this, the present invention provides a method and system for determining the conformity of a pole group before cast welding of a lead-acid battery, which can realize automatic detection of pole group defects, reduce labor costs, and improve detection efficiency and reliability.

[0004] In order to achieve the above object, the present invention adopts the following technical solution:

[0005] In a first aspect, the present invention provides a method for determining the conformity of a lead-acid battery electrode group before cast welding, comprising the following steps:

[0006] The negative electrode plate is encapsulated with a separator, and a single encapsulated negative electrode plate and a single unencapsulated positive electrode plate are taken as a plate group and enter a laminating device for lamination together. After a preset number of laminations, a single plate group is formed;

[0007] The pole groups are transported to the designated inspection stations via tracks;

[0008] At the designated inspection station, an electrical signal is applied to the plate ear position of each plate in the electrode group, and the plate ear is touched downward through a pressure sensor, and the pressure sensor signal and the electrical signal are synchronously transmitted to the control system;

[0009] The control system makes compliance determination based on the pressure sensor signals and electrical signals at each designated position in the same pole group;

[0010] If the conformity of a certain pole group is judged to be qualified, it will enter the casting welding process, otherwise, the pole group will be directly eliminated.

[0011] Furthermore, when an electrical signal is applied to the plate ear position of the electrode group, for the positive electrode side, the electrical signal is transmitted to the control system through the top plate ear, the bottom frame and the conductive base;

[0012] For the negative plate side, if the encapsulation is normal, the negative plate is insulated from the positive plates on both sides and cannot transmit electrical signals to the control system; if there is a defect in the encapsulation, the negative plate is short-circuited with the positive plates on both sides, forming an electrical signal, which is transmitted to the control system.

[0013] Furthermore, the control system performs conformity determination in the following manner: the positive plates and negative plates in the pole group are numbered in sequence to form a plurality of designated positions that require conformity determination, and normal information satisfying conformity determination conditions at each designated position is pre-stored; if the detection signals at each designated position in the pole group match the pre-stored normal information, the conformity determination of the pole group is considered qualified; if the detection signals at one or more designated positions in the pole group do not match the pre-stored normal information, the pole group is considered to have defects, and the defect categories of the pole group include: fewer pieces, more pieces, not stacked in the specified order, and encapsulation defects.

[0014] Furthermore, if for any specified position of the positive plate, there are pressure signals and electrical signals applied on the positive plate side, but there are no pressure signals and electrical signals applied on the negative plate side; for any specified position of the negative plate, there are pressure signals applied on the negative plate side, but there are no pressure signals and electrical signals applied on the positive plate side and no electrical signals applied on the negative plate side, then the conformity judgment of the electrode group is considered to be qualified.

[0015] Furthermore, if at one or more designated positions of the electrode group, there is neither a pressure signal and an electrical signal applied by the negative electrode plate side nor a pressure signal and an electrical signal applied by the positive electrode plate side, it is considered that the electrode group has a few defects.

[0016] Furthermore, if there are pressure signals or electrical signals at positions other than the designated positions in the electrode group, it is considered that there are multiple defects in the electrode group.

[0017] Furthermore, if for any specified position of the positive plate, there is a pressure signal applied on the negative plate side, but there is no pressure signal and electrical signal applied on the positive plate side and no electrical signal applied on the negative plate side; or, for any specified position of the negative plate, there is a pressure signal and electrical signal applied on the positive plate side, and there is no pressure signal and electrical signal applied on the negative plate side, then it is considered that the electrode group has a defect of not being stacked in the specified order.

[0018] Furthermore, if there are both a pressure signal and an electrical signal applied on the negative plate side at one or more designated positions of the negative plate, it is considered that there is an encapsulation defect in the electrode group.

[0019] In a second aspect, the present invention provides a lead-acid battery cast welding pre-pole group conformity determination system, which is applicable to the lead-acid battery cast welding pre-pole group conformity determination method as described above, comprising:

[0020] The grouping device is used to encapsulate the negative electrode plate with a separator. The single encapsulated negative electrode plate and the single unencapsulated positive electrode plate are regarded as a plate group and enter the lamination device for lamination together. After the preset number of laminations, a single plate group is formed;

[0021] Track device, used to transport the pole group to the designated inspection station;

[0022] A detection device is used to apply an electrical signal to the plate ear position of each plate in the electrode group at a designated detection station, and contact the plate ear downward through a pressure sensor, and the pressure sensor signal and the electrical signal are synchronously transmitted to the control system;

[0023] The control system is used to make conformity determination based on the pressure sensor signals and electrical signals at each designated position in the same pole group; if the conformity determination of a pole group is qualified, the casting welding process is entered; otherwise, the pole group is directly rejected.

[0024] It can be seen from the above technical solutions that, compared with the prior art, the present invention has the following beneficial effects:

[0025] The present invention conducts a comprehensive evaluation of the pressure and electrical signals of each electrode plate in the electrode group, and can determine the compliance of the electrode group before cast welding, such as insufficient or excessive plates, plates not stacked in a specified order, and positive and negative plates short-circuited due to sealing defects, thereby reducing labor costs, improving detection efficiency and reliability, and improving the overall performance and service life of the battery. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying creative work.

[0027] Figure 1 A flow chart of a method for determining compliance of a lead-acid battery electrode group before cast welding provided by the present invention;

[0028] Figure 2 A schematic diagram of the structure of a group of intact electrodes provided by the present invention;

[0029] Figure 3 A schematic diagram of a pole group structure with a few defects provided by the present invention;

[0030] Figure 4 A schematic diagram of a pole group structure with multiple defects provided by the present invention;

[0031] Figure 5A schematic diagram of a structure of pole groups provided by the present invention that are not stacked in a specified order;

[0032] Figure 6 A schematic diagram of the electrode group structure with encapsulation defects provided by the present invention.

[0033] In the figure, 1 is a positive electrode plate, 2 is a negative electrode plate, and 3 is a separator. DETAILED DESCRIPTION

[0034] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0035] like Figure 1 As shown, the embodiment of the present invention discloses a method for determining the conformity of a lead-acid battery electrode group before cast welding, comprising the following steps:

[0036] S1. Encapsulating the negative electrode plate with a separator. The single encapsulated negative electrode plate and the single unencapsulated positive electrode plate are regarded as a plate group and enter a laminating device for lamination. After laminating for a preset number of times, a single plate group is formed.

[0037] S2, transport the pole group to the designated inspection station through the track;

[0038] S3, at the designated inspection station, applying an electrical signal to the plate ear position of each plate in the electrode group, and contacting the plate ear downward through a pressure sensor, and the pressure sensor signal and the electrical signal are synchronously transmitted to the control system;

[0039] S4, the control system makes a compliance determination based on the pressure sensor signals and electrical signals at each designated position in the same pole group;

[0040] S5. If the conformity of a certain pole group is judged to be qualified, the casting welding process is entered; otherwise, the pole group is directly eliminated.

[0041] The above steps are further explained below.

[0042] S1. In the assembly process, the negative plate is encapsulated with a separator. The single encapsulated negative plate and the single unencapsulated positive plate are regarded as a plate group and enter the lamination device for lamination. After the preset number of laminations, a single plate group is formed. The number of laminations varies according to the battery model. Taking the 6-QW-50 battery as an example, the final plate group is as follows: Figure 2As shown, the negative electrode plate 2 is encapsulated by a separator 3, and the positive electrode plate 1 is not encapsulated. The electrode group includes 5 positive electrode plates 1 and 4 negative electrode plates 2.

[0043] S2. Transport the pole group to the designated inspection station via the track.

[0044] S3, Extreme Group Conformity Testing:

[0045] An electrical signal is applied to the upper plate ear position of the electrode group, and the plate ear is contacted downward through the pressure sensor; for the positive plate side, since there is no partition encapsulation, the electrical signal is transmitted to the control system through the top plate ear, the bottom frame and the conductive base;

[0046] For the negative plate side, if the encapsulation is normal, the negative plate is insulated from the positive plates on both sides and cannot transmit electrical signals to the control system; if there is a defect in the encapsulation, the negative plate and the positive plates on both sides are short-circuited to form an electrical signal, which is transmitted to the control system.

[0047] In the position without the electrode, the electrical signal cannot be transmitted, and no pressure signal is synchronously transmitted to the control system.

[0048] S4. Compliance determination: The control system makes a compliance determination based on the pressure sensor signal and electrical signal received at the specified position. The determination principle is shown in Table 1:

[0049] Table 1

[0050]

[0051]

[0052] The control system performs conformity determination on the pole group in the following manner: the positive plates and negative plates in the pole group are numbered in order to form a plurality of designated positions that need to be determined for conformity, and normal information satisfying the conformity determination conditions of each designated position is pre-stored; if the detection signals of each designated position in the pole group match the pre-stored normal information, the conformity determination of the pole group is considered qualified; if the detection signals of one or more designated positions in the pole group do not match the pre-stored normal information, the pole group is considered to have defects, and the defect categories of the pole group include: fewer pieces, more pieces, not stacked in the specified order, and encapsulation defects.

[0053] Specifically, the compliance determination process has the following situations:

[0054] (1) Determined as a good electrode group:

[0055] If, for any designated position of the positive plate in the pole group, there is a pressure signal and an electrical signal applied on the positive plate side, but no pressure signal and an electrical signal applied on the negative plate side; for any designated position of the negative plate, there is a pressure signal applied on the negative plate side, but no pressure signal and an electrical signal applied on the positive plate side and no electrical signal applied on the negative plate side, then the pole group is considered qualified. The structure of a good pole group is as follows: Figure 2 The signal status of each specified position is shown in Table 2:

[0056] Table 2

[0057]

[0058] (2) Pole groups determined to have a few defects:

[0059] If there is neither a pressure signal and an electrical signal applied on the negative plate side nor a pressure signal and an electrical signal applied on the positive plate side at one or more designated positions of the electrode group, it is considered that the electrode group has a few defects. The electrode group structure with such defects is as follows: Figure 3 The signal status of each specified position is shown in Table 3.

[0060] Table 3

[0061]

[0062] There may be other situations where there are fewer pieces, and the present invention only shows one example.

[0063] (3) Pole groups determined to have multiple defects:

[0064] If there are pressure signals or electrical signals at other positions in the electrode group except for the designated positions, it is considered that the electrode group has multiple defects. The electrode group structure with such defects is as follows: Figure 4 The signal status of each specified position is shown in Table 4.

[0065] Table 4

[0066]

[0067]

[0068] There may be other multi-chip situations, and the present invention only shows one example.

[0069] (4) Pole groups that are judged to have defects of not being stacked in the specified order:

[0070] If, for any specified position of the positive plate, there is a pressure signal applied on the negative plate side, but there is no pressure signal and electrical signal applied on the positive plate side and no electrical signal applied on the negative plate side; or, for any specified position of the negative plate, there is a pressure signal and electrical signal applied on the positive plate side, but there is no pressure signal and electrical signal applied on the negative plate side, then it is considered that the electrode group has a defect of not being stacked in the specified order. The electrode group structure with this defect is as follows: Figure 5 The signal status of each specified position is shown in Table 5.

[0071] Table 5

[0072]

[0073] There may be other situations where the items are not stacked in the specified order, this is just an example.

[0074] (5) Electrode groups determined to have encapsulation defects:

[0075] Encapsulation defects may occur on both sides of the negative plate, causing the positive and negative plates to short-circuit. At this time, the electrode group structure is Figure 6 The signal status of each specified position is shown in Table 6.

[0076] Table 6

[0077]

[0078]

[0079] There may be other situations where the positive and negative plates are short-circuited at other designated locations, and the present invention only shows one example.

[0080] S5. The pole groups that have passed the conformity assessment enter the casting and welding process, and the unqualified pole groups are directly discarded.

[0081] Through the above steps, automatic detection of whether the electrode group has defects is achieved, which greatly saves labor costs and improves work efficiency.

[0082] In other embodiments, the present invention further provides a lead-acid battery cast welding pre-pole group conformity determination system, which is applicable to the lead-acid battery cast welding pre-pole group conformity determination method as described above, comprising:

[0083] The grouping device is used to encapsulate the negative electrode plate with a separator. The single encapsulated negative electrode plate and the single unencapsulated positive electrode plate are regarded as a plate group and enter the lamination device for lamination together. After the preset number of laminations, a single plate group is formed;

[0084] Track device, used to transport the pole group to the designated inspection station;

[0085] A detection device is used to apply an electrical signal to the plate ear position of the electrode plate in the electrode group at a designated detection station, and contact the plate ear downward through a pressure sensor, and the pressure sensor signal and the electrical signal are synchronously transmitted to the control system;

[0086] The control system is used to make conformity determination based on the pressure sensor signals and electrical signals at each designated position in the same pole group; if the conformity determination of a pole group is qualified, the casting welding process is entered; otherwise, the pole group is directly rejected.

[0087] In this specification, each embodiment is described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the embodiments can be referred to each other. For the device disclosed in the embodiment, since it corresponds to the method disclosed in the embodiment, the description is relatively simple, and the relevant parts can be referred to the method part.

[0088] The above description of the disclosed embodiments enables one skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to one skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but rather to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A method for determining the conformity of a lead-acid battery before casting and welding, characterized in that: The following steps are involved: The negative electrode plate is encapsulated with a separator, and a single encapsulated negative electrode plate and a single unencapsulated positive electrode plate are taken as a plate group and enter a laminating device for lamination together. After a preset number of laminations, a single plate group is formed; The pole groups are transported to the designated inspection stations via tracks; At the designated inspection station, an electrical signal is applied to the plate ear position of each plate in the electrode group, and the plate ear is touched downward through a pressure sensor, and the pressure sensor signal and the electrical signal are synchronously transmitted to the control system; The control system makes compliance determination based on the pressure sensor signals and electrical signals at each designated position in the same pole group; If the conformity of a certain pole group is judged to be qualified, it will enter the casting welding process, otherwise, the pole group will be directly eliminated.

2. The method for determining the conformity of the lead-acid battery before casting welding according to claim 1, characterized in that: When an electrical signal is applied to the plate ear position of the electrode group, for the positive electrode side, the electrical signal is transmitted to the control system through the top plate ear, the bottom frame and the conductive base; For the negative plate side, if the encapsulation is normal, the negative plate is insulated from the positive plate and cannot transmit electrical signals to the control system; if there is a defect in the encapsulation, the negative plate is short-circuited with the positive plates on both sides, forming an electrical signal, which is transmitted to the control system.

3. The method for determining the conformity of the lead-acid battery before casting welding according to claim 1, characterized in that: The control system performs conformity determination in the following manner: the positive plates and negative plates in the pole group are numbered in sequence to form a plurality of designated positions that require conformity determination, and normal information satisfying the conformity determination conditions of each designated position is pre-stored; if the detection signals of each designated position in the pole group match the pre-stored normal information, the conformity determination of the pole group is considered qualified; if the detection signals of one or more designated positions in the pole group do not match the pre-stored normal information, the pole group is considered to have defects, and the defect categories of the pole group include: fewer pieces, more pieces, not stacked in the specified order, and encapsulation defects.

4. The method for determining the conformity of the lead-acid battery pole group before cast welding according to claim 3, characterized in that: If, for any designated position of the positive plate in the pole group, there are pressure signals and electrical signals applied on the positive plate side, but no pressure signals and electrical signals applied on the negative plate side; and for any designated position of the negative plate, there are pressure signals applied on the negative plate side, but no pressure signals and electrical signals applied on the positive plate side and no electrical signals applied on the negative plate side, then the conformity judgment of the pole group is considered to be qualified.

5. The method for determining the conformity of the lead-acid battery pole group before cast welding according to claim 3, characterized in that: If there is neither a pressure signal and an electrical signal applied by the negative plate side nor a pressure signal and an electrical signal applied by the positive plate side at one or more designated positions of the electrode group, it is considered that there are a few defects in the electrode group.

6. The method for determining the conformity of the lead-acid battery pole group before cast welding according to claim 3, characterized in that: If there are pressure signals or electrical signals at other positions in the pole group except for the designated positions, it is considered that there are multiple defects in the pole group.

7. The method for determining the conformity of the lead-acid battery pole group before cast welding according to claim 3, characterized in that: If, for any specified position of the positive plate, there is a pressure signal applied on the negative plate side, but there is no pressure signal and electrical signal applied on the positive plate side, and no electrical signal applied on the negative plate side; or, for any specified position of the negative plate, there is a pressure signal and electrical signal applied on the positive plate side, and there is no pressure signal and electrical signal applied on the negative plate side, then it is considered that the electrode group has the defect of not being stacked in the specified order.

8. The method for determining the conformity of the lead-acid battery pole group before cast welding according to claim 3, characterized in that: If there are both pressure signals and electrical signals applied on the negative plate side at one or more designated positions of the negative plate, it is considered that there is an encapsulation defect in the electrode group.

9. A lead-acid battery pre-cast welding pole group conformity determination system, characterized in that: It is applicable to the method for determining the conformity of the lead-acid battery before cast welding according to any one of claims 1 to 8, comprising: The grouping device is used to encapsulate the negative electrode plate with a separator. The single encapsulated negative electrode plate and the single unencapsulated positive electrode plate are regarded as a plate group and enter the lamination device for lamination together. After the preset number of laminations, a single plate group is formed; Track device, used to transport the pole group to the designated inspection station; A detection device is used to apply an electrical signal to the plate ear position of each plate in the electrode group at a designated detection station, and contact the plate ear downward through a pressure sensor, and the pressure sensor signal and the electrical signal are synchronously transmitted to the control system; The control system is used to make conformity determination based on the pressure sensor signals and electrical signals at each designated position in the same pole group; if the conformity determination of a pole group is qualified, the casting welding process is entered; otherwise, the pole group is directly rejected.

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