A signal acquisition device, system and method of using a signal acquisition system

Abstract

The application provides a signal acquisition device, a signal acquisition system and a use method of the signal acquisition system, which comprises two signal leading parts and a connecting part arranged between the two signal leading parts; the signal leading part comprises a current leading end and a voltage leading end made of conductive material; the connecting part comprises a current end cable and a voltage end cable made of conductive material, the current end cable is connected with the current leading end, the voltage end cable is connected with the voltage leading end, and the current end cable and the voltage end cable are arranged exposed on one side of the connecting part and used for being connected with the grid line of a battery piece; the signal acquisition device provided by the application is in surface-to-surface contact with the grid line of the battery piece, and no matter what structure the grid line is designed as, the voltage / current signal can be led out through the cable of the connecting part. Therefore, the application can meet the signal detection requirement of the grid line of the battery piece under different design structures, and the production cost is reduced.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of photovoltaic technology, in particular to a signal acquisition device, a signal acquisition system and a method for using the signal acquisition system. BACKGROUND

[0002] Solar cell is a device for converting light energy into electrical energy by using photovoltaic effect. The grid line of the solar cell can be used to test the current-voltage performance of the solar cell, and the current-voltage performance of the solar cell can promote the research and development of high-efficiency solar cells.

[0003] At present, the grid line design of the solar cell is various, such as two main grid lines, three main grid lines and other multi-main grid line designs, and the main grid line pattern also appears as a hollow pattern. For such a design method, the current-voltage signal acquisition of the solar cell is usually completed by using a probe array. The voltage needle and the current needle of the probe array are regularly arranged on an insulating plate. The arrangement of the probe needle in the probe array corresponds to the grid design of the solar cell. In order to accurately test the current-voltage performance of the solar cell, the current needle and the voltage needle of the probe array need to accurately contact the fixed position of the grid line of the solar cell during testing to obtain the voltage and current signals.

[0004] However, in the current scheme, the probe array cannot meet the diversity requirement of the grid line design of the solar cell. In the case of changes in the grid line structure, the arrangement of the probe needle in the probe array needs to be redesigned, which increases the equipment loss and production time in the redesign process and increases the production cost. SUMMARY

[0005] The present application provides a signal acquisition device, a signal acquisition system and a method for using the signal acquisition system to solve the problem that in the prior art, in the case of changes in the grid line structure, the arrangement of the probe needle in the probe array needs to be redesigned, which increases the equipment loss and production time in the redesign process and increases the production cost.

[0006] In order to solve the above technical problems, the present application provides a signal acquisition device, which comprises:

[0007] two signal leading parts, and a connecting part arranged between the two signal leading parts;

[0008] The signal leading part comprises a current leading end and a voltage leading end made of a conductive material;

[0009] The connecting part comprises a current end cable and a voltage end cable made of the conductive material, the current end cable is connected with the current leading end, the voltage end cable is connected with the voltage leading end, and the current end cable and the voltage end cable are arranged on one side of the connecting part in a bare state for connecting with the grid line of the solar cell;

[0010] The current terminal cable and the voltage terminal cable are mutually isolated by a first insulating layer, and the current lead and the voltage lead are mutually isolated by a second insulating layer.

[0011] Optionally, a current lead-through hole is arranged in the signal lead-out part, and the current lead is connected with a hole wall of the current lead-through hole.

[0012] Optionally, an electrically-conductive layer is arranged on the hole wall surface of the current lead-through hole.

[0013] Optionally, the voltage lead is arranged exposed on the surface of the signal lead-out part.

[0014] Optionally, the current terminal cable comprises a first cable and a second cable, and the first insulating layer comprises a first insulating subpart and a second insulating subpart.

[0015] The first insulating subpart is arranged between one side of the voltage terminal cable and the first cable, and the second insulating subpart is arranged between the other opposite side of the voltage terminal cable and the second cable.

[0016] The present application provides a signal acquisition system, which comprises:

[0017] a signal acquisition device, a first carrier, a second carrier and a lifting device;

[0018] The first carrier and the second carrier are arranged on the lifting device and are movable relative to the lifting device.

[0019] The signal acquisition device is arranged on the first carrier and the second carrier respectively, and a battery piece is arranged between the first carrier and the second carrier, and the signal acquisition device is used for acquiring voltage and current signals of the battery piece in a working state.

[0020] Optionally, an opening corresponding to the light-receiving area position of the battery piece is arranged on the first carrier.

[0021] Optionally, the signal acquisition system further comprises:

[0022] a limiting lever;

[0023] The limiting lever is arranged on two opposite surfaces of the first carrier and the second carrier.

[0024] Optionally, the signal acquisition system further comprises:

[0025] an electrically-conductive spring;

[0026] One end of the conductive spring is arranged on the first carrier, and the end of the signal acquisition device arranged on the first carrier is connected with the other end of the conductive spring.

[0027] One end of the conductive spring is arranged on the second carrier, and the end of the signal acquisition device arranged on the second carrier is connected with the other end of the conductive spring.

[0028] The conductive spring is used for adjusting the tension of the signal acquisition device.

[0029] The application provides a control method of a signal acquisition system, and the method comprises the following steps:

[0030] The battery piece is placed on the limiting lever of the second carrier, and the position of the light receiving area of the battery piece is made to correspond to the position of the opening of the first carrier.

[0031] The position of the battery piece is adjusted, so that the position of the grid line of the battery piece corresponds to the position of the signal acquisition device.

[0032] The battery piece is clamped between the first carrier and the second carrier by controlling the lifting device.

[0033] The signal acquisition device acquires the voltage and current signals of the battery piece in the working state, and outputs the voltage and current signals through the signal lead-out part.

[0034] The application provides a signal acquisition device, a signal acquisition system and a use method of the signal acquisition system, the signal acquisition device comprises two signal lead-out parts and a connecting part arranged between the two signal lead-out parts; the signal lead-out part comprises a current lead-out end and a voltage lead-out end made of a conductive material; the connecting part comprises a current end cable and a voltage end cable made of a conductive material, the current end cable is connected with the current lead-out end, the voltage end cable is connected with the voltage lead-out end, the current end cable and the voltage end cable are arranged on one side of the connecting part in a bare state and are used for being connected with the grid line of the battery piece; the current end cable and the voltage end cable are isolated from each other through a first insulating layer, and the current lead-out end and the voltage lead-out end are isolated from each other through a second insulating layer, the contact between the signal acquisition device and the grid line of the battery piece is face-to-face contact, and no matter what structure the grid line is designed as, the voltage / current signal can be led out through the cable of the connecting part. Therefore, the application can meet the signal detection requirement of the battery piece grid line under different design structures, and the production cost is reduced. BRIEF DESCRIPTION OF DRAWINGS

[0035] Figure 1 It is a structure diagram of the signal acquisition device provided by the embodiment of the application.

[0036] Figure 2is a partial structure diagram of a signal acquisition device provided by an embodiment of the present application;

[0037] Figure 3 is a structure diagram of a battery piece provided by an embodiment of the present application;

[0038] Figure 4 is a structure diagram of another signal acquisition device provided by an embodiment of the present application;

[0039] Figure 5 is a structure diagram of a signal acquisition system provided by an embodiment of the present application;

[0040] Figure 6 is a step flow chart of a control method of a signal acquisition system provided by an embodiment of the present application. DETAILED DESCRIPTION

[0041] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are some but not all of the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the protection scope of the present application.

[0042] The signal acquisition device provided by the present application will be described in detail below by listing several specific embodiments.

[0043] Referring to Figure 1 , a structure diagram of a signal acquisition device provided by an embodiment of the present application is shown. The signal acquisition device comprises two signal leading-out parts 10 and a connecting part 20 arranged between the two signal leading-out parts 10. Further referring to Figure 2 , a partial structure diagram of a signal acquisition device provided by an embodiment of the present application is shown, wherein the signal leading-out part 10 comprises a current leading-out end 101 and a voltage leading-out end 102 made of conductive material; the connecting part 20 comprises a current end cable 201 and a voltage end cable 202 made of conductive material, the current end cable 201 is connected with the current leading-out end 101, the voltage end cable 202 is connected with the voltage leading-out end 102, the current end cable 201 and the voltage end cable 202 are arranged exposed on one side of the connecting part 20 for connecting with the grid line of the battery piece; the current end cable 201 and the voltage end cable 202 are isolated from each other by a first insulating layer 203, and the current leading-out end 101 and the voltage leading-out end 102 are isolated from each other by a second insulating layer 103.

[0044] In the embodiments of the present application, referring to Figure 3, shows a structural diagram of a battery piece provided by the embodiment of the application. The battery piece 30 can generally have a rectangular structure. The battery piece 30 can be a single-sided light-receiving battery piece or a double-sided light-receiving battery piece. The embodiment of the application takes a commonly used single-sided light-receiving battery piece as an example for subsequent description. In addition, the surface of the battery piece 30 can be provided with a plurality of grid lines 301. The grid line 301 is a bus line of the battery piece 30. The power generation principle of the crystalline silicon battery piece is to utilize the photovoltaic effect to form a potential difference at the PN junction and establish a built-in electric field. However, since there is a voltage and no current flow, a wire is needed to lead out the electric current. The grid line 301 is the first level of wire that carries the current. The main material of the grid line 301 includes silver and has good conduction performance, which can lead out the current and voltage signals.

[0045] Further, referring to Figure 4 , shows a structural diagram of another signal acquisition device provided by the embodiment of the application. Compared with Figure 1 , shows a front structural diagram of the signal acquisition device, Figure 4 , shows a back structural diagram of the signal acquisition device. When the voltage and current signals of the battery piece 30 are acquired, the back of the signal acquisition device can be entirely attached to the grid line 301 of the battery piece 30. In the prior art, the measurement by the probe array is a point-to-surface contact mode. In the embodiment of the application, the contact between the signal acquisition device and the grid line 301 is a surface-to-surface contact. Regardless of the structure of the grid line 301, the voltage and current signals can be led out through the current end cable 201 and the voltage end cable 202 of the connecting part 20. Therefore, by using the signal acquisition device provided by the embodiment of the application, the battery piece with different grid line designs does not need to be re-customized and replaced by the probe array, and the signal detection requirement of the grid line 301 structure under different designs can be met.

[0046] Specifically, the resistivity of the current end cable 201 is less than 10e -6 ohm·m. The material of the current end cable 201 can be copper, gold, silver, alloy, etc. The width of the voltage end cable 202 is generally less than one half of the width of the connecting part 20. The resistivity of the voltage end cable 202 is 10e -5 ohm·m to e -8 ohm·m. The material of the voltage end cable 202 can be copper, gold, silver, alloy, etc. The width of the voltage end cable 202 is less than one third of the width of the connecting part 20. The current end cable 201 and the voltage end cable 202 are isolated from each other by the first insulating layer to achieve complete insulation. The current and voltage signals acquired by the signal acquisition device can be led out to other devices through the current leading-out end 101 and the voltage leading-out end 102.

[0047] It should be noted that, in some cases, the grid line 301 of the battery piece 30 has a hollow design, which produces a hollow structure asFigure 3 The structure of the hollow grid line 3011 is different between the dashed line section and the solid line section, so that the conventional probe array is used to detect the current and voltage signals, the arrangement of the spring needle needs to be set according to the hollow structure, and the problem of poor contact is caused, and the signal acquisition device in the embodiment of the application is used for measurement, the contact between the signal acquisition device and the grid line 301 is the contact between surfaces, and the measurement of the hollow grid line 3011 can be met.

[0048] In summary, the signal acquisition device provided by the embodiment of the application comprises two signal leading parts and a connecting part arranged between the two signal leading parts, the signal leading part comprises a current leading end and a voltage leading end made of a conductive material, the connecting part comprises a current end cable and a voltage end cable made of a conductive material, the current end cable is connected with the current leading end, the voltage end cable is connected with the voltage leading end, the current end cable and the voltage end cable are arranged on one side of the connecting part in a bare state and are used for being connected with the grid line of the battery piece, the current end cable and the voltage end cable are isolated from each other by a first insulating layer, and the current leading end and the voltage leading end are isolated from each other by a second insulating layer, the contact between the signal acquisition device and the grid line of the battery piece is the contact between surfaces, the voltage / current signal can be led out through the cable of the connecting part regardless of the structure of the grid line. Therefore, the signal detection requirement of the grid line of the battery piece under different design structures can be met, and the production cost is reduced.

[0049] Optionally, referring to Figure 2 The current leading hole 104 is arranged on the signal leading part 10, and the current leading end 101 is connected with the hole wall of the current leading hole 104.

[0050] Optionally, the conductive layer is arranged on the hole wall surface of the current leading hole 104.

[0051] In the embodiment of the application, the current signal is usually led out by using the current leading spring needle, so that the current leading hole 104 is arranged on the signal leading part 10, the current leading spring needle is inserted into the current leading hole 104 when the current signal needs to be led out, and the current signal is led out by contacting the current leading end 101. In addition, in order to enhance the transmission reliability of the current signal, the conductive layer can also be arranged on the hole wall surface of the current leading hole 104, and the conductive layer can be made of copper, gold, silver, alloy and the like, so that the probability of signal interruption is reduced.

[0052] Optionally, referring to Figure 2The voltage leading-out end 102 is exposed on the surface of the signal leading-out part 10. In the embodiment of the present application, the voltage leading-out end 102 can be exposed on the surface of the signal leading-out part 10, and the voltage signal can be led out by contacting the voltage detecting device with the voltage leading-out end 102.

[0053] Optionally, referring to Figure 4 The current end cable 201 comprises a first cable 2011 and a second cable 2012, and the first insulation layer 203 comprises a first insulation subpart 2031 and a second insulation subpart 2032; the first insulation subpart 2031 is arranged between one side of the voltage end cable 202 and the first cable 2011, and the second insulation subpart 2032 is arranged between the other opposite side of the voltage end cable 202 and the second cable 2012.

[0054] In the embodiment of the present application, the bottom of the connecting part 20 can be designed as a structure that the two first cables 2011 and the second cable 2012 for collecting current signals clamp the voltage end cable 202, and the first cable 2011, the second cable 2012 and the voltage end cable 202 are mutually insulated, so that the bottom of the connecting part 20 can be in good contact with the grid line of the battery piece. The bottom structure of the connecting part 20 can be not only a flat structure, but also an uneven structure, such as a concave-convex strip. The shape of the connecting part 20 is not limited, such as a regular square or an ellipse. The width of the connecting part 20 is less than 0.5-2 mm, and the height is less than 4 mm.

[0055] In summary, the signal collecting device provided by the embodiment of the present application comprises two signal leading-out parts and a connecting part arranged between the two signal leading-out parts; the signal leading-out part comprises a current leading-out end and a voltage leading-out end made of conductive material; the connecting part comprises a current end cable and a voltage end cable made of conductive material, the current end cable is connected with the current leading-out end, the voltage end cable is connected with the voltage leading-out end, the current end cable and the voltage end cable are exposed on one side of the connecting part and used for connecting with the grid line of the battery piece; the current end cable and the voltage end cable are mutually isolated by a first insulation layer, and the current leading-out end and the voltage leading-out end are mutually isolated by a second insulation layer. The signal collecting device provided by the present application is in surface-to-surface contact with the grid line of the battery piece, and can lead out the voltage / current signal through the cable of the connecting part regardless of the structure of the grid line. Therefore, the present application can meet the signal detection requirements of the battery piece grid line under different design structures, and reduce the production cost.

[0056] In addition, the signal leading-out part is punched and the exposed voltage leading-out end is arranged, which facilitates the leading out of the current voltage signal and improves the detection efficiency.

[0057] Optionally, referring toFigure 5 Fig. 1 shows a structural diagram of a signal acquisition system according to an embodiment of the present application. The signal acquisition system comprises a signal acquisition device 40, a first carrier 50, a second carrier 60 and a lifting device 70. The first carrier 50 and the second carrier 60 are arranged on the lifting device 70 and are movable relative to the lifting device 70. The signal acquisition device 40 is arranged on the first carrier 50 and the second carrier 60 respectively, and a battery piece (not shown in the figure) is arranged between the first carrier 50 and the second carrier 60. The signal acquisition device 40 is used to acquire voltage and current signals of the battery piece in a working state. Figure 5

[0058] In the embodiment of the present application, the specific implementation process of signal acquisition is described by taking a battery piece with double-sided electrodes as an example. The first carrier 50 can carry the whole system and is used to place the battery piece. The positions of the signal acquisition devices 40 arranged on the first carrier 50 and the second carrier 60 correspond to the positions of the grid lines in the battery piece.

[0059] After the battery piece is placed on the second carrier 60, the lifting device 70 is further controlled to lift the second carrier 60 to be attached to the first carrier 50, so that the battery piece is clamped between the first carrier 50 and the second carrier 60. Alternatively, the lifting device 70 can be controlled to lower the first carrier 50 to be attached to the second carrier 60, so that the battery piece is clamped between the first carrier 50 and the second carrier 60.

[0060] After the battery piece is exposed to light, it starts to work normally. At this time, the current signal and the voltage signal are transmitted to the connecting part 20 of the signal acquisition device 40 through the grid lines of the battery piece, and the signal is output by the signal leading-out part 10 connected to the connecting part 20. Referring to Figure 5 The current signal can be output to the current detection pile 502 by the signal leading-out part 10, and the current signal can be detected from the current detection pile 502 by an external current detection device.

[0061] It should be noted that the signal acquisition system provided by the embodiment of the present application can be used to acquire signals of a battery piece with double-sided electrodes, and can also be used to acquire signals of a battery piece with double electrodes on the back. For the battery piece with double electrodes on the back, the first carrier in the signal acquisition system can be removed, and a vacuum suction device can be used to press the back of the battery piece tightly against the second carrier to realize signal acquisition. In addition, the lifting device can be a motor lifting device driven by electricity, which is used to realize an automatic measurement process.

[0062] ​The signal acquisition system provided by the embodiment of the present application can fix the battery piece by controlling the lifting device to make the first carrier and the second carrier, and can collect the current signal and the voltage signal of the grid line of the battery piece by the signal acquisition device arranged on the first carrier and the second carrier, the whole process has high automation degree, and the contact between the signal acquisition device and the grid line of the battery piece is the contact between surfaces, no matter what structure the grid line is designed as, the voltage / current signal can be led out through the cable of the connecting part. Therefore, the present application can meet the signal detection requirement of the battery piece grid line under different design structures, and reduces the production cost.

[0063] Optionally, referring to Figure 5 The first carrier 50 is provided with an opening 501 corresponding to the light receiving area position of the battery piece.

[0064] In the embodiment of the present application, the battery piece needs to be in the working state to detect the current voltage signal, therefore, the opening 501 is used to enable the light to enter the light receiving area of the battery piece, so that the battery piece enters the normal working state and generates the corresponding current voltage signal.

[0065] Optionally, referring to Figure 5 The signal acquisition system further comprises a limiting lever 80, and the limiting lever 80 is arranged on the two opposite surfaces of the first carrier 50 and the second carrier 60.

[0066] In the embodiment of the present application, the limiting lever 80 has a fixed height, and the multiple limiting levers 80 on the same carrier maintain the same height, the limiting lever 10 can determine the pressing position of the battery piece, and ensure the firm fixation of the battery piece.

[0067] Optionally, referring to Figure 5 The conductive spring 90 is arranged on the first carrier 50, and the end of the signal acquisition device 40 arranged on the first carrier 60 is connected with the other end of the conductive spring 90; the conductive spring 90 is arranged on the second carrier 60, and the end of the signal acquisition device 40 arranged on the second carrier 60 is connected with the other end of the conductive spring 90; the conductive spring 90 is used to adjust the tension of the signal acquisition device 40.

[0068] In the embodiment of the present application, one end of the conductive spring 90 is connected with the surface of the carrier, and the other end of the conductive spring 90 is connected with the signal leading-out part 10 of the signal acquisition device 40, the tension of the signal acquisition device 40 can be adjusted through the conductive spring 90, so that the signal acquisition device 40 can be in good contact with the grid line of the battery piece. Meanwhile, the conductive spring 90 can also be connected with the current detection stake 502 of the upper carrier, the current signal can be output, and the exposed voltage leading-out end of the signal leading-out part 10 can output the voltage signal.

[0069] The signal acquisition system provided by the embodiment of the present application can fix the battery piece by controlling the lifting device and the first carrier and the second carrier, and can collect the current signal and the voltage signal of the grid line of the battery piece by the signal acquisition device arranged on the first carrier and the second carrier, so that the whole process has high automation degree, the contact between the signal acquisition device and the grid line of the battery piece is the contact between surfaces, and the voltage / current signal can be led out through the cable of the connecting part regardless of the structure of the grid line. Therefore, the signal detection requirement of the battery piece grid line under different design structures can be met, and the production cost is reduced. In addition, the battery piece is fixed firmly by the cooperation of the limiting lever and the conductive spring, and the detection accuracy is improved.

[0070] Reference Figure 6 The step flow chart of the control method of the signal acquisition system provided by the embodiment of the present application is shown. The control method comprises:

[0071] Step 601, placing the battery piece on the limiting lever of the second carrier, and making the position of the light receiving area of the battery piece correspond to the position of the opening of the first carrier.

[0072] In this step, during the signal acquisition of the battery piece, it is necessary to ensure that the detection environment is well illuminated, and in addition, when the battery piece is placed, the position of the light receiving area of the battery piece is made to correspond to the position of the opening of the first carrier, so that the light is irradiated on the light receiving area of the battery piece through the opening, and the battery piece enters the normal working state.

[0073] In addition, before the battery piece is placed, the tension of the signal acquisition device can also be adjusted to be appropriate by the conductive spring.

[0074] Step 602, adjusting the position of the battery piece, so that the position of the grid line of the battery piece corresponds to the position of the signal acquisition device.

[0075] In this step, the position of the battery piece can be finely adjusted, so that the position of the grid line is aligned with the position of the connecting part of the signal acquisition device.

[0076] Step 603, clamping the battery piece between the first carrier and the second carrier by controlling the lifting device.

[0077] In this step, the lifting device can be controlled to lift the second carrier to be attached to the first carrier, so that the battery piece is clamped between the first carrier and the second carrier. In addition, the lifting device can also be controlled to lower the first carrier to be attached to the second carrier, so that the battery piece is clamped between the first carrier and the second carrier. After attachment, the position of the grid line of the battery piece is closely attached to the connecting part of the signal acquisition device.

[0078] In step 604, the signal acquisition device acquires the voltage and current signals of the battery piece in the working state and outputs the voltage and current signals through the signal lead-out part.

[0079] In this step, the contact between the signal acquisition device and the grid line is a surface-to-surface contact, and no matter what structure the grid line is designed to have, the voltage and current signals can be led out through the current end cable and the voltage end cable of the connecting part and further output by the signal lead-out part.

[0080] In summary, the control method of the signal acquisition system provided by the embodiment of the application comprises the following steps: placing the battery piece on the limiting lever of the second carrier and making the position of the light receiving area of the battery piece correspond to the position of the opening of the first carrier; adjusting the position of the battery piece so that the position of the grid line of the battery piece corresponds to the position of the signal acquisition device; clamping the battery piece between the first carrier and the second carrier by controlling the lifting device; and acquiring the voltage and current signals of the battery piece in the working state by the signal acquisition device and outputting the voltage and current signals through the signal lead-out part. In the signal acquisition system provided by the application, the contact between the signal acquisition device and the grid line of the battery piece is a surface-to-surface contact, and no matter what structure the grid line is designed to have, the voltage and current signals can be led out through the cable of the connecting part. Therefore, the application can meet the signal detection requirements of the battery piece grid line under different design structures, reduce the production cost, and improve the automation degree and detection efficiency of signal detection by using the automatic detection system.

[0081] Those skilled in the art can clearly understand that, for the convenience and brevity of description, the specific working process of the system, device and unit described above can refer to the corresponding process in the foregoing method embodiments, which will not be described here.

[0082] The above only describes the preferred embodiments of the application and should not be used to limit the application. Any modification, equivalent replacement and improvement made within the spirit and principle of the application should be included in the protection scope of the application.

[0083] The above only describes the specific embodiments of the application, but the protection scope of the application is not limited thereto. Any modification or replacement within the technical range disclosed by the application can be easily thought of by those skilled in the art and should be included in the protection scope of the application. Therefore, the protection scope of the application should be subject to the protection scope of the claims.

Claims

1. A signal acquisition device, characterized by, The signal acquisition device is in contact with the grid line surface of the battery piece, and comprises: two signal leading parts, and a connecting part arranged between the two signal leading parts; the signal leading part comprises a current leading end and a voltage leading end made of conductive material; the connecting part comprises a current terminal cable and a voltage terminal cable made of the conductive material, the current terminal cable is connected with the current leading end, the voltage terminal cable is connected with the voltage leading end, and the current terminal cable and the voltage terminal cable are arranged on one surface of the connecting part in a bare manner and used for connecting with the grid line of the battery piece; the current terminal cable and the voltage terminal cable are isolated from each other by a first insulating layer, and the current leading end and the voltage leading end are isolated from each other by a second insulating layer; the current terminal cable comprises a first cable and a second cable, the first insulating layer comprises a first insulating part and a second insulating part, and the first cable and the second cable clamp the voltage terminal cable; on the bottom surface of the signal acquisition device, the first insulating part is arranged between one surface of the voltage terminal cable and the first cable, and the second insulating part is arranged between the other opposite surface of the voltage terminal cable and the second cable.

2. The signal acquisition device of claim 1, wherein, a current leading through hole is arranged in the signal leading part, and the current leading end is connected with the hole wall of the current leading through hole.

3. The signal acquisition device of claim 2, wherein, a conductive layer is arranged on the surface of the hole wall of the current leading through hole.

4. The signal acquisition apparatus of claim 1, wherein the voltage leading end is arranged on the surface of the signal leading part in a bare manner.

5. A signal acquisition system characterized by, The signal acquisition system comprises: a signal acquisition device, a first carrier, a second carrier and a lifting device; the first carrier and the second carrier are arranged on the lifting device and movable relative to the lifting device; the signal acquisition device is arranged on the first carrier and the second carrier respectively, and a battery piece is arranged between the first carrier and the second carrier, and the signal acquisition device is used for acquiring voltage and current signals of the battery piece in a working state; the signal acquisition device comprises two signal leading parts and a connecting part arranged between the two signal leading parts; the connecting part comprises a current terminal cable and a voltage terminal cable made of conductive material, the current terminal cable is connected with a current leading end, the voltage terminal cable is connected with a voltage leading end, and the current terminal cable and the voltage terminal cable are arranged on one surface of the connecting part in a bare manner and used for connecting with the grid line of the battery piece; the current terminal cable comprises a first cable and a second cable, a first insulating layer comprises a first insulating part and a second insulating part, and the first cable and the second cable clamp the voltage terminal cable; on the bottom surface of the signal acquisition device, the first insulating part is arranged between one surface of the voltage terminal cable and the first cable, and the second insulating part is arranged between the other opposite surface of the voltage terminal cable and the second cable.

6. The signal acquisition system of claim 5, wherein, an opening corresponding to the light receiving area position of the battery piece is arranged on the first carrier.

7. The signal acquisition system of claim 5, wherein, The signal acquisition system further comprises: a limiting lever; the limiting lever is arranged on two opposite surfaces of the first carrier and the second carrier.

8. The signal acquisition system of claim 5, wherein, The signal acquisition system further comprises: a conductive spring; one end of the conductive spring is arranged on the first carrier, and the end of the signal acquisition device arranged on the first carrier is connected with the other end of the conductive spring; one end of the conductive spring is arranged on the second carrier, and the end of the signal acquisition device arranged on the second carrier is connected with the other end of the conductive spring; the conductive spring is used for adjusting the tension of the signal acquisition device.

9. A control method of a signal acquisition system, applied to the signal acquisition system of any one of claims 5-8, characterized in that, The method comprises: placing a battery piece on the limiting lever of the second carrier, and making the position of the light receiving area of the battery piece correspond to the position of the opening of the first carrier; adjusting the position of the battery piece so that the position of the grid line of the battery piece corresponds to the position of the signal acquisition device; clamping the battery piece between the first carrier and the second carrier by controlling the lifting device; the signal acquisition device acquires the voltage and current signals of the battery piece in the working state, and outputs the voltage and current signals through the signal lead-out part; the signal acquisition device comprises two signal lead-out parts and a connecting part arranged between the two signal lead-out parts; the connecting part comprises a current end cable and a voltage end cable made of conductive material, the current end cable is connected with a current lead-out end, the voltage end cable is connected with a voltage lead-out end, the current end cable and the voltage end cable are arranged on one side of the connecting part, and are used for connecting with the grid line of the battery piece; the current end cable comprises a first cable and a second cable, the first insulating layer comprises a first insulating subpart and a second insulating subpart; wherein the first cable and the second cable hold the voltage end cable; on the bottom surface of the signal acquisition device, the first insulating subpart is arranged between one side of the voltage end cable and the first cable, and the second insulating subpart is arranged between the other opposite side of the voltage end cable and the second cable.

Images