Battery edge voltage detection device and detection equipment

Abstract

This application provides a battery edge voltage detection device and detection equipment. The aforementioned battery edge voltage detection device includes a conductive holding member and a conductive brush member. The conductive holding member is used to contact the positive electrode of the battery cell to be processed; the conductive brush member is used to abut against the side folded sealing edge of the aluminum-plastic film shell of the battery cell to be processed, so that the conductive brush member is electrically connected to the aluminum-plastic film shell. The aforementioned battery edge voltage detection device, by having the conductive brush member abut against the side folded sealing edge of the aluminum-plastic film shell of the battery cell to be processed, ensures that the conductive brush member contacts the aluminum layer in the aluminum-plastic film shell of the battery cell to be processed. This avoids the situation where traditional detection probes puncture the aluminum-plastic film to contact the aluminum layer, easily causing damage to the battery cell. Furthermore, it provides a larger contact surface between the conductive holding member and the aluminum layer in the aluminum-plastic film shell of the battery cell to be processed, thereby ensuring effective contact between the conductive holding member and the aluminum layer inside the aluminum-plastic film shell, improving the accuracy of battery edge voltage detection, and thus improving the reliability of the detection results.

Description

Technical Field

[0001] This invention relates to the field of battery manufacturing technology, and in particular to a battery side voltage detection device and equipment. Background Technology

[0002] The outermost packaging material for square lithium-ion batteries is an aluminum-plastic film. This film has a three-layer structure: an outermost nylon layer, a middle aluminum layer, and an innermost polypropylene layer. Adhesive is used to bond adjacent layers. After the aluminum-plastic film is perforated, the battery cell is packaged inside. The two layers are then hot-pressed together to form two hot-melt aluminum-plastic films. The structure, from the outside in, consists of a nylon layer, an aluminum layer, a polypropylene layer, another polypropylene layer, an aluminum layer, and another nylon layer. Adhesive is used to bond adjacent layers. During the processing of the aluminum-plastic film, it is necessary to test the voltage between the battery's positive electrode and the film to check for damage.

[0003] Traditionally, the voltage between the positive electrode and the aluminum-plastic film is tested by contacting and pressing a test probe or other conductive material against the cell tabs, then connecting it to a voltage resistance meter via a wire. The other end of the probe pierces the outermost nylon layer of the aluminum-plastic film to reach the aluminum layer in the middle, and is then connected to the voltage resistance meter via another wire. This allows the voltage between the battery's positive electrode and the aluminum-plastic film to be detected. After detecting the edge voltage, the excess material on the side is removed, i.e., the pierced area is cut off. The next step is folding the edge. However, the test probe is prone to piercing and scratching the cell when contacting the aluminum layer in the aluminum-plastic film, making the operation difficult and making it hard to ensure effective contact with the aluminum layer, resulting in unreliable test results. Summary of the Invention

[0004] The purpose of this invention is to overcome the shortcomings of the prior art and provide a battery edge voltage detection device and equipment that can detect the voltage of folded battery, reduce battery production costs, and improve detection accuracy.

[0005] The objective of this invention is achieved through the following technical solution:

[0006] A battery edge voltage detection device includes a voltage-conducting holding member and a conductive brush member. The voltage-conducting holding member is used to contact the positive electrode of the battery cell to be processed. The conductive brush member is used to abut against the side folded sealing edge of the aluminum-plastic film shell of the battery cell to be processed, so that the conductive brush member is electrically connected to the aluminum-plastic film shell.

[0007] In one embodiment, the conductive brush component includes a brush fixing body and a plurality of conductive brush lines. The brush fixing body is fixed around the plurality of conductive brush lines, and at least one of the conductive brush lines is used to abut against the side folded sealing edge of the aluminum-plastic film shell.

[0008] In one embodiment, the brush fixing body is configured in a bent shape.

[0009] In one embodiment, the conductive brush component further includes a shaping and retaining member that abuts against a plurality of the conductive brush lines, and the brush fixing body is respectively fixed around the shaping and retaining member and the plurality of conductive brush lines.

[0010] In one embodiment, the shaping retainer is located above the plurality of conductive brush lines.

[0011] In one embodiment, the voltage-conducting holder includes a voltage-conducting holder body and a detection probe.

[0012] In one embodiment, the conductive holding element body and the detection probe are integrally formed.

[0013] In one embodiment, the voltage-conducting support further includes a sleeve that is fitted onto the voltage-conducting support body.

[0014] In one embodiment, the conductive holding member is used to elastically abut against the positive electrode of the battery cell to be processed.

[0015] A battery side voltage detection device includes the battery side voltage detection apparatus described in any of the above embodiments. The battery side voltage detection apparatus further includes a voltage resistance detector and two conductive wires. The positive terminal of the voltage resistance detector is electrically connected to the conductive brush component through one of the conductive wires, and the negative terminal of the voltage resistance detector is electrically connected to the conductive brush component through the other conductive wire.

[0016] Compared with the prior art, the present invention has at least the following advantages:

[0017] (1) The battery side voltage detection device described above, by having the conductive brush abut against the side folded sealing edge of the aluminum-plastic film shell of the battery cell to be processed, makes the conductive brush contact the aluminum layer in the aluminum-plastic film shell of the battery cell to be processed. This avoids the situation where the traditional detection probe can easily puncture and scratch the battery cell by piercing the aluminum-plastic film to contact the aluminum layer. It also makes the contact surface between the conductive brush and the aluminum layer of the aluminum-plastic film of the battery cell to be processed larger, thereby making the contact between the conductive brush and the aluminum layer of the aluminum-plastic film of the battery cell to be processed effective, improving the accuracy of battery side voltage detection, and thus improving the reliability of the detection results.

[0018] (2) In addition, the conductive brush component makes contact with the aluminum layer in the aluminum-plastic film by abutting the side folded sealing edge of the aluminum-plastic film shell of the battery cell to be processed. This solves the limitation that voltage detection must be performed before cutting and folding the edge in traditional battery production. Battery edge detection is not restricted by the process and improves the detection convenience of the battery edge voltage detection device. Attached Figure Description

[0019] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present invention and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1 This is a schematic diagram of the battery side voltage detection device in one embodiment;

[0021] Figure 2 for Figure 1 A partial schematic diagram of the conductive brush component of the battery side voltage detection device shown.

[0022] Figure 3 for Figure 2 A cross-sectional view of the conductive brush component of the battery side voltage detection device shown. Detailed Implementation

[0023] To facilitate understanding of the present invention, a more complete description will be given below with reference to the accompanying drawings. Preferred embodiments of the invention are shown in the drawings. However, the invention can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided to provide a thorough and complete understanding of the disclosure of the invention.

[0024] It should be noted that when an element is referred to as being "fixed to" another element, it can be directly attached to the other element or there may be an intervening element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "vertical," "horizontal," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementation.

[0025] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0026] This application provides a battery edge voltage detection device, including a voltage-conducting holder and a conductive brush. The voltage-conducting holder is used to contact the positive electrode of the battery cell to be processed; the conductive brush is used to abut against the side folded sealing edge of the aluminum-plastic film shell of the battery cell to be processed, so that the conductive brush is electrically connected to the aluminum-plastic film shell. The above-described battery edge voltage detection device, by having the conductive brush abut against the side folded sealing edge of the aluminum-plastic film shell of the battery cell to be processed, ensures that the conductive brush contacts the aluminum layer in the aluminum-plastic film shell of the battery cell to be processed. This avoids the situation where traditional detection probes puncture the aluminum-plastic film to contact the aluminum layer, which can easily puncture and scratch the battery cell. Furthermore, it provides a larger contact area between the voltage-conducting holder and the aluminum layer of the aluminum-plastic film of the battery cell to be processed, thus ensuring effective contact and improving the accuracy of battery edge voltage detection, thereby improving the reliability of the detection results. In addition, the conductive brush component achieves contact with the aluminum layer in the aluminum-plastic film by abutting against the side folded sealing edge of the aluminum-plastic film shell of the battery cell to be processed. This solves the limitation that voltage testing must be performed before cutting and folding the edge in traditional battery production. Battery edge testing is not restricted by the process and improves the convenience of battery edge voltage testing device.

[0027] Please see Figure 1 This is a schematic diagram of the battery side voltage detection device of the present invention;

[0028] One embodiment of the battery side voltage detection device 10 includes a voltage-conducting holding member 100 and a conductive brush member 200, wherein the voltage-conducting holding member 100 is used to contact the positive electrode of the battery cell to be processed. Please refer to the following: Figure 2 and Figure 3 The conductive brush 200 is used to abut against the side folded sealing edge of the aluminum-plastic film shell of the battery cell to be processed, so that the conductive brush 200 is electrically connected to the aluminum-plastic film shell. In this embodiment, by abutting against the side folded sealing edge of the aluminum-plastic film shell of the battery cell to be processed, the conductive brush 200 contacts the aluminum layer in the aluminum-plastic film shell of the battery cell to be processed. This avoids the situation where traditional detection probes easily puncture the aluminum-plastic film and scratch the battery cell by piercing the aluminum layer with a detection probe. It also makes the contact surface between the conductive voltage holder 100 and the aluminum layer of the aluminum-plastic film of the battery cell to be processed larger, thereby making the contact between the conductive voltage holder 100 and the aluminum layer of the aluminum-plastic film of the battery cell to be processed effective, improving the accuracy of battery edge voltage detection, and thus improving the reliability of the detection results. In addition, the conductive brush 200 achieves contact with the aluminum layer in the aluminum-plastic film by abutting against the side folded sealing edge of the aluminum-plastic film shell of the battery cell to be processed. This solves the limitation that voltage testing must be performed before cutting and folding the edge in traditional battery production. Battery edge testing is not restricted by the process and improves the convenience of testing of the battery edge voltage testing device 10.

[0029] Please see Figure 2 In one embodiment, the conductive brush component 200 includes a brush fixing body 210 and a plurality of conductive brush lines 220. The brush fixing body 210 is fixedly surrounding the plurality of conductive brush lines 220, and at least one of the conductive brush lines 220 is used to abut against the side folded sealing edge of the aluminum-plastic film shell. In this embodiment, the conductive voltage holder 100 abuts against the positive electrode of the battery cell to be processed, and the conductive brush component 200 is used to abut against the side folded sealing edge of the aluminum-plastic film shell of the battery cell to be processed, so that the conductive brush component 200 is electrically connected to the aluminum-plastic film shell, thereby realizing the detection of the side folded sealing edge voltage of the aluminum-plastic film shell, that is, realizing the detection of the battery side voltage. Furthermore, by using the conductive brush 200 to abut against the side folded edge of the aluminum-plastic film shell of the battery cell to be processed, the problem of traditional detection probes easily puncturing and scratching the battery cell by piercing the aluminum-plastic film to contact the aluminum layer is avoided. This also allows the conductive voltage holder 100 to better abut against the side folded edge of the aluminum-plastic film shell of the battery cell to be processed, thereby effectively contacting the aluminum layer in the aluminum-plastic film shell of the battery cell to be processed, thus improving the reliability of the detection results. Even further, the conductive brush 200 is used to abut against the side folded edge of the aluminum-plastic film shell of the battery cell to be processed, so that the conductive brush 200 is electrically connected to the aluminum-plastic film shell. This solves the limitation of traditional battery edge voltage detection, which requires voltage detection before edge cutting and folding operations, making the battery edge voltage detection process more flexible and improving the convenience of the battery edge voltage detection device 10.

[0030] Please see Figure 2 In one embodiment, the brush fixing body 210 is bent. In this embodiment, the brush fixing body 210 is bent, which allows it to better surround and fix the multiple conductive brush lines 220, thus enabling better contact between adjacent conductive brush lines 220. This results in a more compact overall structure formed by the multiple conductive brush lines 220, reducing the reliability of the conductive brush component 200 when pressed against the side folded sealing edge of the aluminum-plastic film shell, thereby improving the accuracy of edge voltage detection.

[0031] To improve the conductivity of the conductive brush wires and enhance the reliability of the battery side voltage detection device, a conductive reinforcing layer is further provided on the surface of each conductive brush wire. This reinforcing layer can be a metal layer, such as a gold layer, silver layer, or foam alloy layer. In other embodiments, the conductive reinforcing layer is not limited to a metal layer; it can also be other non-metallic conductive layers, such as conductive rubber layers or nano-conductive material layers. This reduces the contact area between each conductive brush wire and oxygen in the air, thereby reducing damage caused by oxidation and corrosion, and minimizing maintenance and replacement. Furthermore, by covering each conductive brush wire with a conductive reinforcing layer, the cross-sectional area of ​​each conductive brush wire is increased, resulting in a lower overall resistance between the conductive brush wire and the reinforcing layer. This reduces the overall resistance of the conductive brush wire and the reinforcing layer to current, thereby improving the conductivity of the conductive brush wires, making the detection of the battery side voltage more sensitive, and enhancing the reliability of the detection results of the battery side voltage detection device.

[0032] To better avoid damage to the aluminum-plastic film shell of the battery cell during battery edge voltage testing, each of the conductive brush wires has a circular cross-section with a radius of 0.1-0.2 mm. In this embodiment, the radius of the cross-section of each conductive brush wire is 0.1-0.2 mm, ensuring good conductivity while maintaining good flexibility and ductility. This high flexibility and ductility prevents scratches on the cut surface of the aluminum-plastic film of the battery cell during edge voltage testing, thus avoiding damage to the battery cell. It also allows for better elastic contact between the conductive brush wire and the cut surface of the aluminum-plastic film, resolving the issue of scratches caused by the conductive brush wire during testing. At the same time, this also allows each of the conductive brush lines to make better contact with the cut surface of the aluminum-plastic film, ensuring effective contact between each conductive brush line and the cut surface of the aluminum-plastic film, that is, effective contact with the aluminum layer inside the aluminum-plastic film, thereby ensuring the effectiveness of the battery side voltage detection device and further improving the reliability of the detection results of the battery side voltage detection device.

[0033] Furthermore, the length of the conductive brush wire is greater than the thickness of the side fold seal of the aluminum-plastic film shell of the battery cell to be processed. In this embodiment, the length of the conductive brush wire is greater than the thickness of the aluminum-plastic film shell, so that the contact area between each conductive brush wire and the aluminum layer of the aluminum-plastic film shell of the battery cell to be processed is maximized, ensuring effective contact of the conductive brush wire, thereby ensuring the reliability of the battery side voltage detection structure. This further improves the reliability of the detection results of the battery side voltage detection device. At the same time, the aluminum-plastic film can be a three-layer structure including a nylon layer, an aluminum layer, and a polypropylene layer from the outside to the inside, with adjacent layers bonded together by an adhesive to form an adhesive layer. Specifically, in one embodiment, the aluminum-plastic film can also be a six-layer structure consisting of a nylon layer, an aluminum layer, a polypropylene layer, a polypropylene layer, an aluminum layer, and a nylon layer, with adjacent layers bonded together by an adhesive to form an adhesive layer, so that each conductive brush wire can be used for the detection of aluminum-plastic films with various layer structures, thereby improving the applicability of battery side voltage detection.

[0034] It is understood that the conductive brush abuts against the edge of the side folded sealing edge of the aluminum-plastic film shell of the battery cell to be processed, so that the conductive brush exerts a downward force on the side folded sealing edge of the aluminum-plastic film shell of the battery cell to be processed, while the sealing edge of the side folded sealing edge of the aluminum-plastic film shell of the battery cell to be processed exerts an upward force on the conductive brush. When the conductive brush is used multiple times, that is, the conductive brush repeatedly presses against the sealing edge of the side folded sealing edge of the aluminum-plastic film shell of the battery cell to be processed, the conductive brush is prone to lifting, making it unable to abut well against the side folded sealing edge of the aluminum-plastic film shell of the battery cell to be processed. This results in a small contact area or even ineffective contact between the conductive brush and the side folded sealing edge of the aluminum-plastic film shell of the battery cell to be processed, making the detection result of the battery side voltage detection device 10 unreliable, thereby reducing the detection accuracy of the battery side voltage detection device, and further reducing the effectiveness of the detection result of the battery side voltage detection device, thus shortening the service life of the battery side voltage detection device. To avoid warping of the conductive brush component after repeated use, thus extending the service life of the battery side voltage detection device, and to prevent damage to the aluminum-plastic film shell caused by the conductive brush component during side voltage detection, the conductive brush component 200 further includes a shaping and retaining member 230. The shaping and retaining member 230 abuts against a plurality of conductive brush lines 220, and the brush fixing body 210 is respectively fixed around the shaping and retaining member 230 and the plurality of conductive brush lines 220. In this embodiment, the shaping and retaining member abuts against a plurality of conductive brush lines, meaning that each conductive brush line is subject to the fixing and limiting force of the shaping and retaining member, making it less likely for each conductive brush line to warp when pressed against the side folded sealing edge of the aluminum-plastic film shell of the battery cell to be processed. Furthermore, the brush fixing body is respectively fixed around the shaping and holding member and the multiple conductive brush lines. Since the shaping and holding member and the multiple conductive brush lines are fixed side by side to the brush fixing body, and the shaping and holding member abuts and supports the multiple conductive brush lines, the fixing effect of each conductive brush line is further enhanced, avoiding the problem of each conductive brush line lifting after repeated use. This ensures that the side voltage detection has better accuracy, thus extending the service life of the battery side voltage detection device, and avoiding the problem of the conductive brush members damaging the aluminum-plastic film shell when detecting side voltage.

[0035] Further, please refer to Figure 3The shaping and holding component includes a shaping body 232 and a plurality of shaping conductive wires 234. The shaping body 232 covers and is fixed to one end of the plurality of shaping conductive wires 234, and the shaping body 232 abuts against the plurality of conductive brush wires. Each shaping conductive wire 234 is arranged parallel to each conductive brush wire. In this embodiment, the shaping body 232 covers and is fixed to one end of the plurality of shaping conductive wires 234, that is, one end of each shaping conductive wire 234 is fixed to the shaping body 232, and the other end of each shaping conductive wire 234 is adjacent to the side folded sealing edge of the aluminum-plastic film shell of the battery cell to be processed, so that each shaping conductive wire 234 abuts against the plurality of conductive brush wires, and the plurality of conductive brush wires also abut against the shaping body 232. Further, each shaping conductive wire 234 is arranged parallel to each conductive brush wire. Each shaped conductive wire 234 is located above each conductive brush wire, allowing each shaped conductive wire 234 to support and fix each conductive brush wire. This achieves parallel arrangement between each shaped conductive wire 234 and each conductive brush wire, further preventing the conductive brush from warping after repeated use and ensuring better accuracy in battery-side voltage detection. In one embodiment, the cross-sectional diameter of each shaped conductive wire 234 is larger than that of each conductive brush wire, resulting in greater bending strength for each shaped conductive wire 234 than for each conductive brush wire. This allows the shaping body 232 and the multiple shaped conductive wires 234 to support and position the conductive brush wire, while avoiding the problem of the shaping retainer easily damaging the side fold seal of the aluminum-plastic film shell, and improving the detection accuracy of the battery-side voltage detection device. Furthermore, the shaping body 232 can be a metal part, giving the shaping body good support strength and conductivity. In this embodiment, the shaping body 232 is a metal part, so that the shaping body 232 abuts against the plurality of conductive brush lines and is electrically connected to the plurality of conductive brush lines.

[0036] Further, please refer to Figure 3 The surface of the shaping body 232 is formed with a positioning and holding groove 238, and portions of the multiple conductive brush lines are pressed and fixed in the positioning and holding groove. In this embodiment, each portion of the conductive brush line is located in the positioning and holding groove, and the portion of each conductive brush line located in the positioning and holding groove is used to abut against the side folded sealing edge of the aluminum-plastic film shell of the battery cell to be processed. The positioning and fixing groove further realizes the shaping and fixing effect of each conductive brush line, so that each conductive brush line will not be warped or bent, thereby making the conductive brush part less prone to deformation. In this way, each conductive brush line is reliably held against the side folded sealing edge of the aluminum-plastic film shell, further ensuring that the battery-side voltage detection has good detection accuracy.

[0037] Further, please refer to Figure 3 The shaping and retaining component further includes a locking block (not shown in the figure). One end of the locking block is rotatably connected to the shaping body 232, and the other end is snap-fitted to the shaping body 232. The locking block is used to press and fix multiple conductive brush wires to the inner wall of the positioning and holding groove. In this embodiment, the locking block allows each conductive brush wire to be better pressed against the inner wall of the positioning and holding groove, making it less likely for each conductive brush wire to warp or deform. This further strengthens the shaping and fixing force of the shaping and retaining component on each conductive brush wire, preventing the conductive brush from warping or deforming, thereby ensuring better accuracy in battery-side voltage detection.

[0038] To ensure better contact between the conductive brush and the side folded sealing edge of the aluminum-plastic film shell of the battery cell to be processed, and to better prevent damage to the aluminum-plastic film shell caused by the conductive brush during voltage detection, please refer to [further details needed]. Figure 3 The shaping and holding component also includes an adhesive block 236, which covers the end of each of the shaping conductive wires 234 adjacent to the shaping body 232. A portion of the adhesive block 236 also covers the outer surface of the shaping body 232, preventing the multiple shaping conductive wires 234 from spreading out and ensuring they are more neatly fixed to the shaping body 232. This allows the conductive brush to better elastically contact the side folded sealing edge of the aluminum-plastic film shell of the battery cell under processing when pressed down, reducing scratches and damage to the aluminum-plastic film shell of the battery cell under processing during the pressing and testing process. It also better avoids damage to the aluminum-plastic film shell caused by the conductive brush during the testing edge voltage.

[0039] Further, please refer to Figure 3 The surface of the overmolded block 236 forms a hollow annular groove, and the shaping body 232 is exposed in the hollow annular groove. The shaping retainer also includes a conductive ring, which is sleeved on and connected to the shaping body 232. The outer peripheral wall of the conductive ring abuts against the multiple conductive brush lines, giving the shaping retainer good elasticity and enabling it to shape the multiple conductive brush lines, preventing them from warping easily during use, thereby improving the testing accuracy of the edge voltage detection.

[0040] Furthermore, before performing battery edge voltage testing on the cell to be processed, the cell to be processed is folded. After folding the cell to be processed, it is folded again to form a side-folded sealing edge of the aluminum-plastic film shell. In this embodiment, the cell to be processed is first trimmed and then folded, and finally the battery edge voltage is tested. Traditional testing methods require first detecting the battery edge voltage before proceeding to the next step of trimming, removing excess material from the side edges (i.e., removing the punctured areas of the aluminum-plastic film), and then folding the edge again. This traditional testing method is only suitable for cases where the sides of the cell to be processed are wide and have not been trimmed or folded. Compared to traditional battery edge voltage testing methods, the battery edge voltage testing device of this application is not limited by the production process of the cell to be processed and can detect the voltage at any time as needed, thus improving the detection sensitivity of the battery edge voltage testing device. Furthermore, by setting the aluminum layer in the aluminum-plastic film to contact the aluminum layer through the cut surface of the aluminum-plastic film, the situation of having to cut off the punctured part of the aluminum-plastic film when making contact with the aluminum layer is avoided, thus saving aluminum-plastic film material and reducing the manufacturing cost of the battery processing and production process.

[0041] In one embodiment, please refer to Figure 2 Furthermore, since the conductive brush wire 220 is prone to warping, causing the conductive brush component 200 to deform, the conductive brush component 200 cannot effectively contact the side folded sealing edge of the aluminum-plastic film shell. The positioning and retaining component prevents the conductive brush component 200 from deforming, thereby ensuring that the conductive brush component 200 can effectively contact the side folded sealing edge of the aluminum-plastic film shell, and thus improving the reliability of the detection results of the battery side voltage detection device 10.

[0042] In one embodiment, please refer to Figure 2The shaping and holding members 230 are respectively located above the plurality of conductive brush lines 220. In this embodiment, it can be understood that when the battery side voltage is detected, the conductive brush members 200 abut against the side folded sealing edge of the aluminum-plastic film shell by pressing down, that is, by the plurality of conductive brush lines 220 pressing down against the side folded sealing edge of the aluminum-plastic film shell, to avoid the problem that the plurality of conductive brush lines 220 are prone to curling upwards due to the opposite force of the side folded sealing edge of the aluminum-plastic film shell along the downward pressing direction of the conductive brush members 200. The positioning retainers are located above the plurality of conductive brush members 200, so that the shaping retainer 230 can better fix and limit each conductive brush line 220, avoiding the occurrence of warping and deformation of the conductive brush member 200, thereby improving the service life of the conductive brush member 200 and thus improving the service life of the battery side voltage detection device. At the same time, it allows the conductive brush member 200 to make better effective contact and abutment with the side folded sealing edge of the aluminum-plastic film shell, improving the contact performance between the conductive brush member 200 and the side folded sealing edge of the aluminum-plastic film shell, and further improving the reliability of the detection results of the battery side voltage detection device 10.

[0043] Please see Figure 1 In one embodiment, the voltage-conducting holder 100 includes a voltage-conducting holder body and a detection probe, with the voltage-conducting holder body connected to the detection probe. In this embodiment, the voltage-conducting holder body and the detection probe are integrally formed, eliminating the need for slots or holes or other connecting structures between them, and simplifying the components of the voltage-conducting holder. This reduces the manufacturing cost of the battery side voltage detection device 10 and makes the overall structure of the voltage-conducting holder body more stable, thereby improving the reliability of the side voltage detection.

[0044] Please see Figure 1 In one embodiment, the voltage-conducting holder 100 further includes a sleeve fitted over the voltage-conducting holder body. In this embodiment, the sleeve is an insulating protective sleeve. The sleeve fitted over the voltage-conducting holder body prevents direct human contact with the voltage-conducting holder body from causing electric shock, and also prevents external dust from adhering to the voltage-conducting holder body, making the surface of the voltage-conducting holder body less prone to dust accumulation. This facilitates cleaning and maintenance of the voltage-conducting holder body surface, and reduces the contact between the voltage-conducting holder body and oxygen in the air, making the voltage-conducting holder body less susceptible to oxidation damage, thus improving the service life of the voltage-conducting holder 100 and further reducing the battery manufacturing cost.

[0045] Please see Figure 1In one embodiment, the voltage-conducting holder 100 is used to elastically abut against the positive electrode of the cell to be processed. In this embodiment, the voltage-conducting holder 100 elastically abuts against the surface of the positive electrode tab of the cell to be processed, so that during the process of the voltage-conducting holder 100 pressing against the surface of the positive electrode tab of the cell to be processed, the voltage-conducting holder 100 will not cause rigid scratches to the cell to be processed, thereby making the cell to be processed less prone to damage and further reducing the battery manufacturing cost. In addition, the elastic abutment between the voltage-conducting holder 100 and the surface of the positive electrode tab of the cell to be processed also allows the voltage-conducting holder 100 to better flexibly fit against the surface of the positive electrode tab of the cell to be processed, that is, to increase the elastic contact area between the voltage-conducting holder 100 and the surface of the positive electrode tab of the cell to be processed, thereby improving the detection accuracy of the battery side voltage detection device 10.

[0046] In one embodiment, the battery side voltage detection device 10 further includes a voltage resistance detector (not shown) and two conductive wires (not shown). The positive terminal of the voltage resistance detector is electrically connected to the conductive holding member 100 through one of the conductive wires, and the negative terminal of the voltage resistance detector is electrically connected to the conductive brush member 200 through the other conductive wire. In this embodiment, the voltage resistance detector is also used to process and display the voltage data between the positive terminal of the battery cell to be processed and the side folded sealing edge of the aluminum-plastic film shell, so that the tester can determine whether the aluminum-plastic film shell of the battery cell to be processed is damaged based on the voltage data output by the voltage resistance detector, and thus detect whether the quality of the battery cell to be processed is qualified.

[0047] This application also provides a battery manufacturing apparatus, including the battery edge voltage detection device described in any of the above embodiments. Further, the battery edge voltage detection device includes a voltage-conducting holding member and a conductive brush member. The voltage-conducting holding member is used to contact the positive electrode of the battery cell to be processed; the conductive brush member is used to abut against the side folded sealing edge of the aluminum-plastic film shell of the battery cell to be processed, so that the conductive brush member is electrically connected to the aluminum-plastic film shell. In the above-described battery manufacturing apparatus, by having the conductive brush member abut against the side folded sealing edge of the aluminum-plastic film shell of the battery cell to be processed, the conductive brush member contacts the aluminum layer in the aluminum-plastic film shell of the battery cell to be processed. This avoids the situation where traditional detection probes easily puncture and scratch the battery cell by piercing the aluminum-plastic film to contact the aluminum layer, and also provides a larger contact surface between the voltage-conducting holding member and the aluminum layer of the aluminum-plastic film of the battery cell to be processed. This ensures effective contact between the voltage-conducting holding member and the aluminum layer of the aluminum-plastic film of the battery cell to be processed, improving the accuracy of battery edge voltage detection and thus improving the reliability of the detection results. In addition, the conductive brush component achieves contact with the aluminum layer in the aluminum-plastic film by abutting against the side folded sealing edge of the aluminum-plastic film shell of the battery cell to be processed. This solves the limitation that voltage testing must be performed before cutting and folding the edge in traditional battery production. Battery edge testing is not restricted by the process and improves the convenience of battery edge voltage testing device.

[0048] Furthermore, the battery side voltage detection device employs the following battery side voltage detection method to detect the side voltage, the detection method including some or all of the following steps:

[0049] The battery cell to be processed is first trimmed and then folded to form an aluminum-plastic film shell with side-folded sealing edges.

[0050] Press the conductive brush component down to abut against the side folded edge of the aluminum-plastic film shell;

[0051] Press the conductive holding member down to abut against the front ear surface of the battery cell to be processed;

[0052] The voltage resistance detector is electrically connected to the voltage holding device and the second detection device via the two conductive wires respectively.

[0053] Obtain the voltage and resistance data from the voltage and resistance detector, and determine whether the aluminum layer in the aluminum-plastic film is damaged based on the obtained voltage and resistance data results.

[0054] In this embodiment, the conductive brush is pressed down to abut against the side folded edge of the aluminum-plastic film shell to achieve effective contact between the voltage-conducting holder and the aluminum layer in the side folded edge of the aluminum-plastic film shell. This reduces the risk of scratching the battery cell to be processed caused by the voltage-conducting holder piercing the aluminum-plastic film to contact the aluminum layer in traditional battery edge voltage detection methods. Simultaneously, the voltage-conducting holder contacts the aluminum layer in the aluminum-plastic film through the cut surface of the battery cell to be processed. This overcomes the limitation of traditional battery production where voltage detection must be performed before edge cutting and folding. Traditional detection methods require detecting the battery edge voltage before proceeding to the next step of edge cutting, removing excess material from the side edges (i.e., removing the punctured area of ​​the aluminum-plastic film), and then folding the edge in the next step. In other words, traditional detection methods are only suitable when the side folded edges of the aluminum-plastic film shell of the battery cell to be processed are wide and have not been cut or folded. Furthermore, traditional methods involve puncturing the side folded edge of the aluminum-plastic film shell using a test probe. Therefore, during the edge trimming process, excess material on the side needs to be removed—that is, the punctured portion of the aluminum-plastic film shell needs to be cut off—before the next step of folding. However, the battery edge voltage detection device of this application achieves effective contact between the conductive brush and the aluminum layer in the side folded edge of the aluminum-plastic film shell by pressing down on it. This avoids the need for puncturing the aluminum-plastic film shell to contact the aluminum layer, which necessitates cutting off the punctured portion of the aluminum-plastic film during edge trimming. This reduces waste of the aluminum-plastic film shell and consequently reduces battery production costs.

[0055] Compared with the prior art, the present invention has at least the following advantages:

[0056] (1) The battery side voltage detection device of this application abuts against the side folded sealing edge of the aluminum-plastic film shell of the battery cell to be processed by the conductive brush, so that the conductive brush contacts the aluminum layer in the aluminum-plastic film shell of the battery cell to be processed. This avoids the situation where the traditional detection probe can easily puncture and scratch the battery cell by piercing the aluminum-plastic film to contact the aluminum layer. It also makes the contact surface between the conductive brush and the aluminum layer of the aluminum-plastic film of the battery cell to be processed larger, so that the contact between the conductive brush and the aluminum layer of the aluminum-plastic film of the battery cell to be processed is effective, thereby improving the accuracy of battery side voltage detection and thus improving the reliability of the detection results.

[0057] (2) In addition, the conductive brush component makes contact with the aluminum layer in the aluminum-plastic film by abutting the side folded sealing edge of the aluminum-plastic film shell of the battery cell to be processed. This solves the limitation that voltage detection must be performed before cutting and folding the edge in traditional battery production. Battery edge detection is not restricted by the process and improves the detection convenience of the battery edge voltage detection device.

[0058] The embodiments described above are merely illustrative of several implementations of the present invention, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the invention patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these all fall within the protection scope of the present invention. Therefore, the protection scope of this invention patent should be determined by the appended claims.

Claims

1. A battery side voltage detection device, characterized in that, include: A voltage-conducting retainer, the voltage-conducting retainer being used to contact the positive electrode of the battery cell to be processed; A conductive brush component is configured to abut against the side folded edge of the aluminum-plastic film shell of the battery cell to be processed after the battery cell to be processed is folded, so that the conductive brush component abuts against the cut surface of the aluminum-plastic film and is electrically connected to the aluminum-plastic film shell. The conductive brush component exerts a downward force on the side folded edge of the aluminum-plastic film shell of the battery cell to be processed, and the cut surface of the side folded edge of the aluminum-plastic film shell of the battery cell to be processed exerts an upward force on the conductive brush component. The conductive brush component includes a brush fixing body and a plurality of conductive brush lines. The brush fixing body is fixed around the plurality of conductive brush lines, and at least one of the conductive brush lines is used to abut against the side folded edge of the aluminum-plastic film shell. The conductive brush component further includes a shaping and retaining component, which abuts against a plurality of the conductive brush lines, and the brush fixing body is respectively fixed around the shaping and retaining component and the plurality of the conductive brush lines; The shaping and holding component includes a shaping body and a plurality of shaping conductive wires. The shaping body covers and is fixed to one end of the plurality of shaping conductive wires, and the shaping body abuts against the plurality of conductive brush wires. Each shaping conductive wire is arranged parallel to each conductive brush wire. The other end of each of the shaped conductive wires is adjacent to the side folded sealing edge of the aluminum-plastic film shell of the battery cell to be processed, so that each of the shaped conductive wires abuts against a plurality of conductive brush wires, and the plurality of conductive brush wires also abut against the shaping body. Each of the shaped conductive wires is arranged parallel to each of the conductive brush wires, and each of the shaped conductive wires is located above each of the conductive brush wires, so that each of the shaped conductive wires can support and fix each of the conductive brush wires, so that each of the shaped conductive wires is arranged parallel to each of the conductive brush wires. The surface of the shaping body is formed with positioning and holding grooves, and portions of the multiple conductive brush wires are pressed and fixed in the positioning and holding grooves. Each of the conductive brush lines is located within the positioning and holding groove. The portion of each conductive brush line located in the positioning and holding groove is used to abut against the side folded sealing edge of the aluminum-plastic film shell of the battery cell to be processed, so as to press and fix each of the conductive brush lines through the positioning and fixing groove, and to shape and fix each of the conductive brush lines. The shaping and retaining component also includes a locking block, one end of which is rotatably connected to the shaping body, and the other end of which is snap-fitted to the shaping body. The locking block is used to press and fix multiple conductive brush wires to the inner wall of the positioning and holding groove. The shaping and retaining component also includes an adhesive block, which covers the end of each of the shaping conductive wires adjacent to the shaping body, and a portion of the adhesive block also covers the outer surface of the shaping body, so that the multiple shaping conductive wires are more neatly fixed on the shaping body. A hollowed-out annular groove is formed on the surface of the rubber-coated block, and the shaping body is exposed in the hollowed-out annular groove. The shaping retainer also includes a conductive ring, which is sleeved on the shaping body and connected to the shaping body. The outer peripheral wall of the conductive ring abuts against a plurality of conductive brush lines.

2. The battery-side voltage detection device according to claim 1, characterized in that, The brush fixing body is configured in a bent shape.

3. The battery-side voltage detection device according to claim 1, characterized in that, The shaping and retaining elements are respectively located above the plurality of conductive brush lines.

4. The battery-side voltage detection device according to claim 1, characterized in that, The voltage-conducting support includes a voltage-conducting support body and a detection probe, wherein the voltage-conducting support body and the detection probe are integrally formed.

5. The battery-side voltage detection device according to claim 4, characterized in that, The voltage-conducting support also includes a sleeve, which is sleeved onto the voltage-conducting support body.

6. The battery side voltage detection device according to claim 5, characterized in that, The conductive holding element is used to elastically abut against the positive electrode of the battery cell to be processed.

7. The battery-side voltage detection device according to claim 6, characterized in that, The battery side voltage detection device also includes a voltage resistance detector and two conductive wires. The positive terminal of the voltage resistance detector is electrically connected to the conductive holding element through one of the conductive wires, and the negative terminal of the voltage resistance detector is electrically connected to the conductive brush element through the other conductive wire.

8. A battery side voltage detection device, characterized in that, Includes the battery side voltage detection device according to any one of claims 1-7.

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