Battery piece welding temperature detection device and series welding system

Abstract

The utility model discloses a battery piece welding temperature detecting device and a series welding system. The battery piece welding temperature detecting device comprises a supporting frame and a temperature measuring assembly. At least one hollow area is arranged in the supporting frame, and the hollow area corresponds to the battery piece; the temperature measuring assembly is installed on the supporting frame and used for making contact with the battery piece so as to detect the welding temperature of the battery piece. According to the battery piece welding temperature detection device, the welding temperature of the battery piece can be rapidly measured, the structure is simple, operation is convenient, the accuracy of the detection result can be guaranteed, and the detection cost can be reduced.

Description

Technical Field

[0001] The present application belongs to the field of photovoltaic technology, and specifically relates to a battery cell welding temperature detection device and a series welding system. Background Art

[0002] In the photovoltaic module manufacturing process, the welding of battery cells is an important process link. Usually, a string welding machine is used to weld the battery cells and welding ribbons. In the battery cell welding process, temperature is an important process parameter that affects the process quality. In order to ensure the stability of welding quality, the welding temperature of the battery cells needs to be monitored.

[0003] In the related technology, there are mainly two detection methods. One is to manually paste the temperature sensor, evenly paste multiple temperature sensors on the preset battery cell, and send the preset battery cell and the press together into the welding light box of the stringer for temperature detection. However, this method requires manual pasting of the temperature sensor every time it is detected, which is complicated to operate and has large errors. The other is to set a single-point laser temperature measuring device in the welding light box of the stringer for temperature measurement, but this method is more expensive, and the pressure needle and mesh of the auxiliary welding will block the light spot, affecting the accuracy of the temperature measurement result. Utility Model Content

[0004] The present application aims to provide a battery cell welding temperature detection device and a series welding system, which can partially or completely solve the problems of detecting the welding temperature of battery cells in the related art by manually pasting temperature measuring sensors, which is complicated to operate and has large errors, and by using a single-point laser temperature measuring device, which is expensive and may be affected by the pressure needle and pressure mesh.

[0005] In order to solve the above technical problems, this application is implemented as follows:

[0006] In the first aspect, the present application proposes a battery cell welding temperature detection device, comprising: a support frame and a temperature measuring component; at least one hollow area is provided in the support frame, and the hollow area corresponds to the battery cell; the temperature measuring component is installed on the support frame; the temperature measuring component is used to contact the battery cell to detect the welding temperature of the battery cell.

[0007] Optionally, the support frame comprises a frame body, the frame body is provided with the hollow area, the frame body is used to be placed around the battery cell, and there is a gap between the frame body and the battery cell.

[0008] Optionally, a press is provided on the surface of the battery cell, and the press has two oppositely arranged ends; the frame body is provided with a positioning groove at a position corresponding to the end, the positioning groove is connected to the hollow area, and the positioning groove is suitable for positioning and cooperating with the end.

[0009] Optionally, the temperature measuring component at least partially extends to the hollow area, and the temperature measuring component includes a temperature measuring element, a pressing piece and a fastener; the pressing piece is connected to the frame body through the fastener, the temperature measuring element is connected to the frame body or the pressing piece, and the pressing piece is used to press the temperature measuring element so that the temperature measuring element contacts the battery cell.

[0010] Optionally, the temperature measuring component further includes a heat insulating layer, the temperature measuring element has a temperature measuring part, the heat insulating layer is arranged between the temperature measuring part and the pressing member, and the pressing member is used to press the temperature measuring part so that the temperature measuring part contacts the battery cell.

[0011] Optionally, a hollow structure is provided in the pressing member, and the hollow structure is staggered with the temperature measuring element.

[0012] Optionally, a reinforcement portion is provided in the frame body, and the reinforcement portion protrudes and extends from the frame body in a direction away from the battery cell.

[0013] Optionally, the battery cell welding temperature detection device further includes a press; the support frame includes a frame body, and the battery cell and the press are mounted on the frame body.

[0014] Optionally, the battery cell welding temperature detection device further comprises a heat conductive layer, the heat conductive layer covers a side of the battery cell away from the frame body, and the edges around the heat conductive layer are at least partially connected to the frame body.

[0015] Optionally, the temperature measuring component includes a temperature measuring element, and the temperature measuring element is at least partially disposed in the hollow area and is bonded and fixed to the battery cell.

[0016] Optionally, the support frame further includes reinforcing ribs formed at opposite ends of the frame body.

[0017] Optionally, two opposite ends of the frame body are bent in a direction away from the battery sheet to form the reinforcing ribs.

[0018] Optionally, the battery cell welding temperature detection device further includes: a multi-channel thermometer; the temperature measuring components are provided in plurality, and the multi-channel thermometer is connected to the plurality of temperature measuring components.

[0019] In the second aspect, the present application proposes a string welding system, comprising: a string welding device, and a battery cell welding temperature detection device as described in any of the above items, wherein the string welding device is used for welding the battery cell and the welding strip, and the battery cell welding temperature detection device is used to detect the welding temperature of the string welding device used for welding the battery cell and the welding strip.

[0020] In the embodiment of the present application, a support frame and a temperature measuring component are provided, a hollow area is provided in the support frame, and the hollow area corresponds to the battery cell during detection, and then the temperature measuring component is used to contact the surface of the battery cell located in the hollow area to detect the welding temperature of the battery cell. The battery cell welding temperature detection device in the present application can realize the quick measurement of the welding temperature of the battery cell and the welding strip, with a simple structure and convenient operation, which can not only ensure the accuracy of the detection result, but also reduce the detection cost.

[0021] Additional aspects and advantages of the present application will be given in part in the description below, and in part will become apparent from the description below, or will be learned through the practice of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The above and / or additional aspects and advantages of the present application will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0023] Figure 1 is a schematic diagram of a battery cell welding temperature detection device according to an embodiment of the present application;

[0024] Figure 2 is a schematic diagram of the assembly structure of the support frame and the temperature measurement component according to an embodiment of the present application;

[0025] Figure 3 is a schematic diagram of a temperature measurement component according to an embodiment of the present application;

[0026] Figure 4 is an exploded view of a temperature measurement component according to an embodiment of the present application;

[0027] Figure 5 is a top view of a support frame according to an embodiment of the present application;

[0028] Figure 6 is a bottom view of a support frame according to an embodiment of the present application;

[0029] Figure 7 is a schematic diagram of another battery cell welding temperature detection device according to an embodiment of the present application;

[0030] Figure 8 is an exploded diagram of another battery cell welding temperature detection device according to an embodiment of the present application;

[0031] Fig. 9 It is a schematic diagram of a photovoltaic module string welding system according to an embodiment of the present application.

[0032] Reference numerals:

[0033] 100: support frame; 101: hollow area; 102: positioning groove; 110: frame body; 120: reinforcement part; 130: reinforcement rib; 200: temperature measuring assembly; 210: temperature measuring element; 211: temperature measuring part; 212: connection part; 220: pressing piece; 221: hollow structure; 230: fastener; 240: thermal insulation layer; 300: battery cell; 301: welding strip; 400: presser; 401: end; 500: thermal conductive layer; 600: string welding equipment; 601: preheating platform; 602: heating platform; 603: cooling platform; 604: welding light box. DETAILED DESCRIPTION

[0034] The embodiments of the present application will be described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present application, and should not be construed as limitations on the present application. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in the field without making creative work are within the scope of protection of the present application.

[0035] The term "first" or "second" in the specification and claims of this application may include one or more of the features explicitly or implicitly. In the description of this application, unless otherwise specified, "plurality" means two or more. In addition, "and / or" in the specification and claims means at least one of the connected objects, and the character " / " generally means that the objects connected before and after are in an "or" relationship.

[0036] In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0037] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0038] The following is a detailed description of the battery cell welding temperature detection device and the string welding system provided in the embodiments of the present application through specific embodiments and their application scenarios in conjunction with the accompanying drawings.

[0039] like Figure 1 As shown, a battery cell welding temperature detection device according to some embodiments of the present application includes a support frame 100 and a temperature measuring component 200; at least one hollow area 101 is provided in the support frame 100, and the hollow area 101 corresponds to the battery cell 300; the temperature measuring component 200 is installed on the support frame 100, and the temperature measuring component 200 is used to contact the battery cell 300 to detect the welding temperature of the battery cell 300.

[0040] In the embodiment of the present application, a support frame 100 and a temperature measuring component 200 are provided, and a hollow area 101 is provided in the support frame 100. During detection, the hollow area 101 corresponds to the battery cell 300, and then the temperature measuring component 200 is used to contact the surface of the battery cell 300 located in the hollow area 101 to detect the welding temperature of the battery cell 300. The welding temperature of the battery cell 300 can at least be understood as the temperature of the battery cell 300 being welded to the welding strip. The battery cell welding temperature detection device in the present application can realize the quick measurement of the welding temperature of the battery cell 300, has a simple structure and is easy to operate, which can not only ensure the accuracy of the detection result, but also reduce the detection cost.

[0041] It can be understood that the battery cell welding temperature detection device in the embodiment of the present application can be used in the welding process of the battery cell 300 to detect the welding temperature of the battery cell 300, so as to perform process control and equipment debugging based on the measured welding temperature.

[0042] In practical applications, such as Fig. 9 As shown, a string welding device 600 can be used to perform welding operations on the battery cell 300. The string welding device 600 may include a preheating platform 601, a heating platform 602, a cooling platform 603 and a transmission mechanism. The transmission mechanism is used to transmit the battery cell 300 through the preheating platform 601, the heating platform 602 and the cooling platform 603 in sequence. A welding light box 604 is provided above the heating platform 602.

[0043] Specifically, when performing the welding process of the battery cell 300, a soldering tape is usually laid on the surface of the battery cell 300 to be welded, and a press 400 is set to press the soldering tape and the battery cell 300, and then the battery cell 300, the soldering tape and the press 400 are sent to the heating platform 602 together, so that the battery cell 300 can be welded using a welding light box 604.

[0044] In the embodiment of the present application, when it is necessary to detect the welding temperature of the battery cell 300, the battery cell welding temperature detection device is placed on the battery cell 300 in the heating platform 602, and the welding light box 604 is used to irradiate light to the surface of the battery cell 300 to perform a heating welding operation. In this way, while performing the welding operation, the temperature measuring component 200 can be used to detect the welding temperature of the surface of the battery cell 300.

[0045] Specifically, the battery cell welding temperature detection device is provided with a support frame 100 and a temperature measuring component 200. The support frame 100 can be used to install and position the temperature measuring component 200, so as to ensure that the position of the temperature measuring component 200 is relatively fixed during each detection operation. A hollow area 101 is provided in the support frame 100, and the battery cell 300 is located in the hollow area 101 during the test, so that the battery cell 300 can be irradiated, heated and welded by the welding light box 604.

[0046] It is understandable that the cell 300 in the cell welding temperature detection device can be selected from the cell to be welded in the production line, or a separate cell for testing can be set. In order to obtain more accurate test results, the structure of the cell 300 used in the cell welding temperature detection device should be consistent with the structure of the cell to be welded in the photovoltaic module welding process.

[0047] In some embodiments, one or more temperature measuring components 200 may be disposed in the hollow area 101 of the support frame 100, and each temperature measuring component 200 is in contact with the surface of the battery cell 300 to detect the welding temperature on the surface of the battery cell 300. In addition, the present application uses a contact-type temperature measuring component 200, which is in contact with the battery cell 300 to sense the temperature, which can reduce the influence of other factors on the temperature measuring component 200 and improve the accuracy of the temperature measurement result.

[0048] It should be noted that the press 400 in the battery cell welding temperature detection device can select the press structure used in the battery cell welding process to better simulate the actual welding scenario of the battery cell 300. The specific structure of the press 400 can be flexibly set according to actual needs, and the embodiment of the present application does not limit this.

[0049] Alternatively, if Figure 1 and Figure 2As shown, the support frame 100 includes a frame body 110 , a hollow area 101 is provided in the frame body 110 , and the frame body 110 is used to be placed around the battery cell 300 , with a gap between the frame body 110 and the battery cell 300 .

[0050] In the embodiment of the present application, the temperature measuring component 200 is installed on the frame body 110 to form an integrated structure. When testing, the frame body 110 can be directly placed around the battery cell 300. The temperature measuring component 200 is installed on the frame body 110 and at least partially extends to the hollow area 101, and the temperature measuring component 200 is in contact with the battery cell 300, so that the temperature measurement operation can be achieved. In practical applications, the welding temperature detection operation can be directly performed based on the battery cell 300 to be welded in the production line, which is convenient and quick to operate and does not affect the welding production of the battery cell 300.

[0051] It is understandable that the battery cell 300 in the embodiment of the present application does not need to be set up separately, and can be directly used with the battery cell 300 to be welded in the production line. A hollow area 101 is provided in the frame body 110. When performing the detection operation, the frame body 110 is placed on the battery cell 300 in the production line so that the battery cell 300 is located in the hollow area 101, and the temperature measurement component 200 installed on the frame body 110 can contact the battery cell 300.

[0052] Furthermore, when the support frame 100 is placed on the battery cell 300, a gap is left between the frame body 110 and the battery cell 300, so as to avoid the influence of the support frame 100 on the welding process of the battery cell 300. Figure 6 As shown, on the side of the frame body 110 facing the battery cell 300, the frame body 110 is provided with a groove structure at the portion corresponding to the four edges of the battery cell 300 so that during the detection process, the frame body 110 and the battery cell 300 are not in contact, thereby avoiding heat conduction between the support frame 100 and the battery cell 300.

[0053] Alternatively, if Figure 1 and Figure 2 As shown, a press 400 is provided on the surface of the battery cell 300, and the press 400 includes two oppositely arranged ends 401. The frame body 110 is provided with a positioning groove 102 at a position corresponding to the end 401. The positioning groove 102 is connected to the hollow area 101, and the positioning groove 102 is suitable for positioning and cooperating with the end 401.

[0054] In the embodiment of the present application, a positioning groove 102 is provided in the frame body 110 so that the positioning groove 102 is structurally matched with the end 401 of the press 400 so that the end 401 of the press 400 can be placed in the positioning groove 102 of the support frame 100 during detection. In this way, the support frame 100 and the press 400 can be quickly positioned and assembled, which not only facilitates the actual detection operation, but also ensures the consistency of the setting position of the temperature measuring component 200 during each measurement, thereby improving the accuracy of the detection result.

[0055] It is understandable that in the welding process of the battery cell 300, a press 400 is provided on the battery cell 300, and the press 400 is placed on the battery cell 300 along the length direction of the battery cell 300, so as to press the welding ribbon 301 and the battery cell 300. The battery cell 300 has a width direction and a length direction, and the size of the battery cell 300 along the length direction is greater than its size along the width direction.

[0056] Among them, Figure 1 As shown, along the length direction of the battery cell 300, the pressing tool 400 includes two oppositely disposed end portions 401. Figure 2 As shown, the frame body 110 is provided with positioning grooves 102 at positions corresponding to the end 401 of the press 400, so that the structure of the positioning grooves 102 is adapted to the structure of the end 401 of the press 400, so that the battery cell welding temperature detection device and the battery cell 300 can be quickly positioned and assembled by the positioning cooperation between the end 401 of the press 400 and the positioning grooves 102.

[0057] In specific applications, the battery cell welding temperature detection device in the embodiment of the present application can be used to perform detection operations based on the battery cells 300 to be welded in the production line. During the detection, the support frame 100 can be directly placed on the battery cell 300, and the positioning groove 102 in the frame body 110 is used to position and cooperate with the end 401 of the press 400, which is convenient and quick to operate.

[0058] In some embodiments, Fig. 9 As shown, the steps of performing the welding temperature detection operation of the battery cell 300 using the battery cell welding temperature detection device of the embodiment of the present application are as follows:

[0059] A plurality of cells 300 to be welded are placed in the machine of the string welding device 600. The cells 300 are covered with welding strips 301. Each cell 300 is provided with a press 400 to press the welding strips 301 and the cells 300. Then, one or more cells 300 to be welded are selected in the machine as test cells, and the machine is paused; the support frame 100 equipped with the temperature measuring component 200 is aligned with the press 400 and placed above the cells 300 to be welded in the machine to form a cell temperature measuring structure; the machine is started, and the cell temperature measuring structure is sent as a whole into the welding light box 604; the welding light box 604 is used to perform heating and welding operations on the cells 300, and at the same time, the temperature measuring component 200 is used to measure and record the welding temperature of the cells; after the welding operation is completed, the cell temperature measuring structure is moved out of the welding light box 604 as a whole, and the support frame 100 is removed.

[0060] Then, the machine is started to continue the welding operation of the battery cell 300. In this way, the welding temperature of the battery cell 300 can be detected without affecting the welding production of the battery cell 300. The operation is convenient and fast, and the detection result is highly accurate.

[0061] Alternatively, if Figure 3 and Figure 4 As shown, the temperature measuring component 200 at least partially extends to the hollow area 101, and the temperature measuring component 200 includes a temperature measuring element 210, a pressing piece 220 and a fastener 230; the pressing piece 220 is connected to the support frame 100 through the fastener 230, and the temperature measuring element 210 is connected to the support frame 100 or the pressing piece 220, and the pressing piece 220 is used to press the temperature measuring element 210 to make the temperature measuring element 210 contact with the battery cell 300.

[0062] In the embodiment of the present application, the temperature measuring assembly 200 is integrally mounted on the support frame 100, and at least a portion of the temperature measuring assembly 200 is disposed in the hollow area 101. More specifically, at least a portion of the temperature measuring element 210 in the temperature measuring assembly 200 extends toward the hollow area 101. During detection, the temperature measuring element 210 is pressed by the pressing member 220 to make the temperature measuring element 210 contact the battery cell 300. In this way, during the detection process, the pressing action of the pressing member 220 can ensure good contact between the temperature measuring element 210 and the battery cell 300.

[0063] Specifically, the fastener 230 can be a structural member such as a screw, a bolt, or a rivet. The fastener 230 can be used to install and fix the pressing member 220 at a predetermined position on the support frame 100. The temperature measuring element 210 is connected to the pressing member 220 or the support frame 100, thereby ensuring that the position of the temperature measuring element 210 is relatively fixed during each measurement.

[0064] In some embodiments, the pressing member 220 can be made of a rigid material with a certain elastic deformation ability, such as a steel sheet, a copper sheet, etc. For example, the pressing member 220 can be set as a spring pressing sheet. In this way, it can ensure that the pressing member 220 can provide a pressing force to the temperature measuring element 210 so that the temperature measuring element 210 and the battery cell 300 maintain good contact; at the same time, the pressing member 220 can produce a certain elastic deformation to play a buffering role and avoid damage to the battery cell 300.

[0065] In specific applications, the temperature measuring element 210 can be a contact temperature measuring element, for example, a thermocouple, a temperature sensor, a thermistor, or other temperature measuring element 210. Of course, other types of temperature measuring elements can also be selected and can be flexibly selected according to actual needs. The embodiment of the present application does not limit this.

[0066] Alternatively, if Figure 4 As shown, the temperature measuring component 200 also includes a heat insulating layer 240 , the temperature measuring element 210 has a temperature measuring portion 211 , the heat insulating layer 240 is disposed between the temperature measuring portion 211 and the pressing member 220 , and the pressing member 220 is used to press the temperature measuring portion 211 to make the temperature measuring portion 211 contact with the battery cell 300 .

[0067] In the embodiment of the present application, a heat insulating layer 240 is provided between the temperature measuring portion 211 of the temperature measuring element 210 and the pressing piece 220 to achieve a heat insulating effect, thereby reducing heat conduction between the battery cell 300 and the pressing piece 220 during the temperature measurement process, and reducing the influence of the temperature measuring component 200 on the temperature of the battery cell 300, thereby improving the accuracy of the measurement result.

[0068] Specifically, the insulation layer 240 can be made of insulation materials, for example, it can be made of insulation materials such as asbestos, ceramic wool, glass wool, polystyrene board, polyurethane foam, etc., or it can be made of other types of insulation materials, which is not limited to the embodiments of the present application.

[0069] In some embodiments, the temperature measuring element 210 may include a connecting portion 212 and a temperature measuring portion 211, one end of the connecting portion 212 is connected to the temperature measuring portion 211, and the other end of the connecting portion 212 is used to connect to a control system or a recording system, so as to use the control system or the recording system to record or display the temperature sensed by the temperature measuring portion 211. Then, the connecting portion 212 is bonded and fixed to the supporting frame 100 and / or the pressing member 220 to fix the temperature measuring element 210.

[0070] Alternatively, if Figure 3 As shown, a hollow structure 221 is provided in the pressing member 220 , and the hollow structure 221 is staggered with the temperature measuring element 210 .

[0071] In the embodiment of the present application, a hollow structure 221 is provided on the pressing member 220, and the hollow structure 221 is staggered with the temperature measuring element 210 so that the light emitted by the welding light box 604 can pass through the hollow structure 221 and illuminate the surface of the battery cell 300, thereby reducing the influence of the pressing member 220 on the welding process and improving the accuracy of the temperature measurement result.

[0072] Among them, the specific structural setting of the hollow structure 221 in the pressing member 220 can be determined according to the matching structure of the pressing member 220 and the temperature measuring element 210, and the embodiment of the present application does not limit this.

[0073] Alternatively, if Figure 2 and Figure 5 As shown, a reinforcing portion 120 is disposed in the frame body 110 , and the reinforcing portion 120 protrudes and extends from the frame body 110 toward a direction away from the battery cell 300 .

[0074] In the embodiment of the present application, by providing a reinforcing portion 120 in the frame body 110, the thickness of the reinforcing portion 120 can be greater than the thickness of the portion of the frame body 110 other than the reinforcing portion 120, so as to reinforce the frame body 110 and improve the overall strength of the support frame 100. At the same time, by providing the reinforcing portion 120 to protrude from the frame body 110 in a direction away from the battery cell 300, interference between the reinforcing portion 120 and the battery cell 300 can be avoided.

[0075] It should be noted that, in actual use, the position of the reinforcement part 120 on the frame body 110 is staggered with the welding light box 604 in the string welding device 600 to avoid interference between the support frame 100 and the welding light box 604 during the welding operation. The specific setting position of the reinforcement part 120 on the frame body 110 can be flexibly set, and the embodiment of the present application does not limit this.

[0076] In some embodiments, the reinforcing portion 120 and the frame body 110 may adopt an integrated structure or a split structure, and may be flexibly configured according to actual needs, without limitation.

[0077] Alternatively, if Figure 7 and Figure 8 As shown, the battery cell welding temperature detection device further includes a press 400 ; the support frame 100 includes a frame body 110 , and the battery cell 300 and the press 400 are mounted on the frame body 110 .

[0078] In the embodiment of the present application, the battery cell 300 and the press 400 are mounted on the frame body 110; the frame body 110 is provided with a hollow area 101, the battery cell 300 is correspondingly arranged in the hollow area 101, and the temperature measuring component 200 is in contact with the battery cell 300. In this way, the frame body 110, the press 400, the battery cell 300 and the temperature measuring component 200 can be assembled in advance to form an integrated battery cell welding temperature detection device, and then when the welding temperature detection operation is required, the battery cell welding temperature detection device can be directly placed in the string welding device 600 as a whole to perform the temperature measurement operation. The battery cell welding temperature detection device using the embodiment of the present application can be reused, is easy and quick to operate, and will not affect the battery cell welding quality in the production line.

[0079] It can be understood that the battery cell 300 and the press 400 used in the battery cell welding temperature detection device of the embodiment of the present application are the same or similar in structure to the battery cell and the press to be welded in the production line, so as to simulate the actual working conditions of the battery cell welding process.

[0080] Specifically, the battery cell 300 is placed in the hollow area 101 of the frame body 110, and the temperature measuring component 200 is arranged in contact with the battery cell 300. At least one hollow area 101 is provided in the frame body 110 so that light can pass through the hollow area 101 and irradiate the surface of the battery cell 300 to simulate the actual welding process.

[0081] In this way, the frame body 110, the press 400, the battery cell 300 and the temperature measuring assembly 200 can be assembled to form an integrated battery cell welding temperature detection device. When performing the welding temperature detection operation, the integrated battery cell welding temperature detection device can be directly sent to the string welding device 600 for temperature detection. After the detection, the battery cell welding temperature detection device is taken out for continued use next time. The battery cell welding temperature detection device in the embodiment of the present application can be used without the battery cells to be welded in the production line, thereby avoiding the influence of the detection operation on the quality of the battery cells in the production line.

[0082] One or more temperature measuring components 200 may be arranged in the hollow area 101, and each temperature measuring component 200 is in contact with the battery cell 300 to measure the surface temperature of the battery cell 300. The temperature measuring component 200 may be mounted and fixed on the support frame 100, or may be directly pasted and fixed on the battery cell 300, which may mean that the temperature measuring component 200 is mounted on the support frame 100.

[0083] In some embodiments, the detection steps of the battery cell welding temperature detection device in the embodiment of the present application are as follows:

[0084] A plurality of battery cells to be welded are placed in the machine of the string welding equipment 600. One or more battery cells to be welded are selected in the machine as battery cells to be replaced, and the machine is paused; the positions of the battery cells to be replaced in the machine are marked; according to the position marks, the battery cells to be welded in the machine are replaced with battery cell welding temperature detection devices; the machine is started, and the battery cell welding temperature detection device is sent to the welding light box 604; the welding operation is performed according to the welding process, and the temperature measuring component 200 is used to detect and record the welding temperature of the battery cells; after the welding operation is completed, the battery cell welding temperature detection device is moved out of the welding light box 604, and the battery cell welding temperature detection device is removed.

[0085] Then, the battery cell to be welded is put into the machine again, and the machine is started to continue the welding operation of the battery cell. In this way, the welding temperature detection operation can be realized without affecting the quality of the battery cell to be welded in the machine, and the battery cell welding temperature detection device can be reused, reducing the detection cost.

[0086] Alternatively, if Figure 8 As shown, the battery cell welding temperature detection device further includes a heat conductive layer 500 , which covers the side of the battery cell 300 away from the frame body 110 , and the edges around the heat conductive layer 500 are at least partially connected to the frame body 110 .

[0087] In the embodiment of the present application, the heat-conducting layer 500 is provided to mount the battery cell 300 on the frame body 110 by using the heat-conducting layer 500, so as to facilitate the use of each detection operation. At the same time, the heat-conducting layer 500 covers the side of the battery cell 300 away from the frame body 110, and during the temperature measurement operation, the heat-conducting layer 500 contacts the machine in the string welding device 600, which can not only meet the heat conduction effect between the battery cell 300 and the machine, but also protect the battery cell 300, thereby improving the service life of the battery cell 300.

[0088] The heat-conducting layer 500 may be made of a high-temperature resistant heat-conducting material, such as polytetrafluoroethylene or the like. The specific material of the heat-conducting layer 500 may be flexibly selected according to actual needs, and the embodiment of the present application does not impose any limitation on this.

[0089] Alternatively, if Figure 8 As shown, the temperature measuring component 200 includes a temperature measuring element. The temperature measuring component 200 is at least partially disposed in the hollow area 101 and is bonded and fixed to the battery cell 300 .

[0090] In the embodiment of the present application, the temperature measuring element 210 is directly adhered and fixed on the battery cell 300 to ensure good contact between the temperature measuring element and the battery cell 300, and also to ensure that the position of each test remains fixed, thereby improving the accuracy of the test results.

[0091] In specific applications, the temperature measuring element may be a contact temperature measuring device, for example, a thermocouple, a temperature sensor, a thermistor or the like. Of course, other types of temperature measuring devices may also be used, and the embodiments of the present application do not limit this.

[0092] Alternatively, if Figure 8 As shown, the support frame 100 further includes reinforcing ribs 130 formed at opposite ends of the frame body 110 .

[0093] In the embodiment of the present application, reinforcing ribs 130 are provided at opposite ends of the frame body 110 to reinforce the support frame 100 , thereby improving the overall strength of the support frame 100 and reducing deformation of the support frame 100 during use.

[0094] It can be understood that the frame body 110 includes a length direction and a width direction, and the press 400 is connected to the frame body 110 along the length direction, and the press 400 can be used to reinforce the frame body 110 along the length direction. By providing reinforcing ribs 130 at both ends of the frame body 110 along the length direction, the frame body 110 can be reinforced along the width direction, thereby improving the overall structural strength of the support frame 100 and improving the service life of the support frame 100.

[0095] In a specific application, the reinforcing rib 130 and the frame body 110 may adopt an integrated structure or a split structure. Those skilled in the art may flexibly configure the structure according to actual needs, and this application does not impose any restrictions on this.

[0096] Alternatively, if Figure 8 As shown, two opposite ends of the frame body 110 are bent in a direction away from the battery cell 300 to form a reinforcing rib 130 .

[0097] In the embodiment of the present application, the two opposite ends of the frame body 110 are bent to form the reinforcing ribs 130 , thereby facilitating the processing and forming of the frame body 110 and the reinforcing ribs 130 , thereby facilitating actual processing and manufacturing.

[0098] Optionally, the battery cell welding temperature detection device further includes a multi-channel thermometer (not shown in the figure); the number of temperature measuring components 200 is multiple, and the multi-channel thermometer is connected to multiple temperature measuring components 200.

[0099] In an embodiment of the present application, a plurality of temperature measuring components 200 are arranged at intervals in the hollow area 101, and the plurality of temperature measuring components 200 are respectively in contact with the battery cell 300. By setting up a plurality of temperature measuring components 200, the temperature of different positions on the surface of the battery cell 300 can be detected. At the same time, a plurality of temperature measuring components 200 can be connected using a multi-channel thermometer to accurately detect the welding temperature at different positions on the surface of the battery cell 300.

[0100] Among them, different temperature measurement points in the battery cell 300 can be predetermined, and then the temperature measurement component 200 is contacted with the corresponding temperature measurement points to detect the temperature of different temperature measurement points. The positions of the temperature measurement points in the battery cell 300 can be set as needed, and this application does not limit this.

[0101] Alternatively, if Fig. 9 As shown, an embodiment of the present application also provides a string welding system, including a string welding device 600, and a battery cell welding temperature detection device as described in any of the above embodiments, wherein the string welding device 600 is used for welding battery cells and welding strips, and the battery cell welding temperature detection device is used to detect the welding temperature of the string welding device 600 used for welding battery cells and welding strips.

[0102] In the embodiment of the present application, a support frame 100 and a temperature measuring component 200 are provided, and a hollow area 101 is provided in the support frame 100. During detection, the hollow area 101 corresponds to the battery cell 300, and then the temperature measuring component 200 is used to contact the surface of the battery cell 300 located in the hollow area 101 to detect the welding temperature of the battery cell 300. The battery cell welding temperature detection device in the present application can realize the quick measurement of the welding temperature of the battery cell 300 and the welding strip. It has a simple structure and is easy to operate, which can not only ensure the accuracy of the detection result, but also reduce the detection cost.

[0103] It should be noted that the battery cell welding temperature detection device in the present application can be used to detect the welding temperature of the battery cell and the welding ribbon on the string welding equipment 600, so as to accurately debug and control the welding process of the string welding equipment 600. The specific structure of the battery cell welding temperature detection device can be found in the above content, and this application will not repeat it here.

[0104] The specific structure of the string welding equipment 600 according to the embodiment of the present application, for example: a preheating platform 601, a heating platform 602, a cooling platform 603, a transmission mechanism, a welding light box 604, etc., is known to ordinary technicians in the field and will not be described in detail here.

[0105] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials, or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

[0106] Although the embodiments of the present application have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present application, and that the scope of the present application is defined by the claims and their equivalents.

Claims

1. A battery cell welding temperature detection device, characterized in that: include: A support frame and a temperature measurement component; the support frame is provided with at least one hollow area, and the hollow area corresponds to the battery cell; The temperature measuring component is installed on the supporting frame, and the temperature measuring component is used to contact the battery cell to detect the welding temperature of the battery cell.

2. The battery cell welding temperature detection device according to claim 1, characterized in that: The support frame comprises a frame body, the frame body is provided with the hollow area, the frame body is used to be placed around the battery sheet, and there is a gap between the frame body and the battery sheet.

3. The battery cell welding temperature detection device according to claim 2, characterized in that: A pressing tool is provided on the surface of the battery cell, and the pressing tool has two oppositely arranged ends; the frame body is provided with a positioning groove at a position corresponding to the end, the positioning groove is connected to the hollow area, and the positioning groove is suitable for positioning and matching with the end.

4. The battery cell welding temperature detection device according to claim 2, characterized in that: The temperature measuring component at least partially extends to the hollow area, and the temperature measuring component includes a temperature measuring element, a pressing piece and a fastener; The pressing piece is connected to the frame body through the fastener, the temperature measuring element is connected to the frame body or the pressing piece, and the pressing piece is used to press the temperature measuring element so that the temperature measuring element contacts the battery cell.

5. The battery cell welding temperature detection device according to claim 4, characterized in that: The temperature measuring component further includes a heat insulating layer. The temperature measuring element includes a temperature measuring portion. The heat insulating layer is disposed between the temperature measuring portion and the pressing member. The pressing member is used to press the temperature measuring portion so that the temperature measuring portion contacts the battery cell.

6. The battery cell welding temperature detection device according to claim 4, characterized in that: The pressing member is provided with a hollow structure, and the hollow structure is staggered with the temperature measuring element.

7. The battery cell welding temperature detection device according to claim 2, characterized in that: A reinforcing portion is disposed in the frame body, and the reinforcing portion protrudes and extends from the frame body toward a direction away from the battery sheet.

8. The battery cell welding temperature detection device according to claim 1, characterized in that: The battery cell welding temperature detection device further comprises a press; the support frame comprises a frame body; the battery cell and the press are mounted on the frame body.

9. The battery cell welding temperature detection device according to claim 8, characterized in that: The battery cell welding temperature detection device further comprises a heat-conducting layer, which covers a side of the battery cell away from the frame body, and the edges around the heat-conducting layer are at least partially connected to the frame body.

10. The battery cell welding temperature detection device according to claim 8, characterized in that: The temperature measuring component includes a temperature measuring element, and the temperature measuring element is at least partially arranged in the hollow area and is bonded and fixed to the battery cell.

11. The battery cell welding temperature detection device according to claim 8, characterized in that: The support frame further includes reinforcing ribs formed at opposite ends of the frame body.

12. The battery cell welding temperature detection device according to claim 11, characterized in that: The opposite ends of the frame body are bent in a direction away from the battery sheet to form the reinforcing ribs.

13. The battery cell welding temperature detection device according to any one of claims 1 to 12, characterized in that: The battery cell welding temperature detection device further includes: a multi-channel temperature measuring instrument, wherein the temperature measuring components are provided in plurality, and the multi-channel temperature measuring instrument is connected to the plurality of temperature measuring components.

14. A string welding system, comprising: A serial welding device, and a battery cell welding temperature detection device according to any one of claims 1 to 13, wherein the serial welding device is used for welding battery cells and welding strips, and the battery cell welding temperature detection device is used for detecting the welding temperature of the serial welding device used for welding battery cells and welding strips.

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