Flexible contact clamp of solar cell
By designing a flexible contact fixture including a support plate, an elastic buffer block and a flexible conductive leather, the problem of probe discharge damage to the solar cell in the prior art is solved, and safe and reliable electrical signal acquisition and testing efficiency are improved.
Patent Information
- Application Number
- CN202421043225.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-05-14
- Publication Date
- 2025-03-21
- Estimated Expiration
- 2034-05-14
AI Technical Summary
The probes used in solar cell testing are costly, cumbersome to maintain and prone to damage, especially the thin film structure of perovskite solar cells.
A flexible contact clamp is designed, including a support plate, an elastic buffer block and a flexible conductive skin. It contacts the solar cell to be tested through the flexible conductive skin, and uses the elastic buffer block to provide a buffering effect to avoid damage to the solar cell.
The acquisition of electrical signals without damaging the solar cell during solar cell testing is achieved, reducing testing costs, simplifying maintenance, and improving testing efficiency.
Smart Images
Figure CN222653020U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the field of solar cell testing devices, in particular to a flexible contact fixture for solar cells. Background Art
[0002] A solar cell is a thin semiconductor sheet that can generate electricity through the photovoltaic effect when exposed to sunlight. The generated current is collected and conducted out through grid lines.
[0003] During the production and R&D process, the performance of solar cells needs to be tested in an electrical manner. During the test, power needs to be supplied to the two poles of the solar cell, or electrical signals need to be collected at the two poles of the solar cell for related tests. Electrical contact devices are required in all electrical tests to form detachable electrical contact with the solar cell to be tested.
[0004] Conventional crystalline silicon solar cells are thin sheets ranging in size from 156mm to 230mm, with one side as the positive electrode and the other side as the negative electrode. Perovskite solar cells are thin films on a substrate, with one side as the positive electrode and the other side as the negative electrode. Perovskite solar cells and conventional crystalline silicon cells can be stacked together to form a stacked solar cell.
[0005] The existing technology mainly achieves electrical contact with solar cells through probe rows, but the probe rows are expensive, difficult to maintain, and easy to be damaged, especially the thin film structure of perovskite solar cells. Summary of the invention
[0006] The utility model aims to solve the above problem and provides a flexible contact fixture which does not damage solar cells during testing.
[0007] The flexible contact fixture of the solar cell of the utility model comprises a support plate, an elastic buffer block and a flexible conductive skin; the flexible conductive skin is a flexible conductive component with a conductive function, which can be specifically conductive cotton, conductive cloth or any other metal foil with a conductive function;
[0008] The flexible conductive skin is arranged on the elastic buffer block;
[0009] The elastic buffer block is arranged on the support plate;
[0010] The flexible conductive skin is provided with connection terminals for externally connecting testing equipment.
[0011] When testing solar cells, the fixture of the utility model is connected to an external test device through the connection terminals on the flexible conductive skin, and the support plate drives the elastic buffer block and the flexible conductive skin to move toward the solar cell to be tested. The electrical signal measured at the connection point between the flexible conductive skin and the solar cell to be tested is transmitted to the test device; the elastic buffer block provides a buffering effect during the contact process between the flexible conductive skin and the solar cell to be tested, while achieving reliable contact between the flexible conductive skin and the solar cell to be tested, avoiding damage to the solar cell to be tested due to squeezing.
[0012] The flexible contact fixture of the solar cell of the utility model comprises a support plate, an elastic buffer block and a flexible conductive skin;
[0013] The flexible conductive skin is connected to the support plate;
[0014] The elastic buffer block is arranged between the aforementioned support plate and the flexible conductive skin;
[0015] The flexible conductive skin is provided with connection terminals for externally connecting testing equipment.
[0016] When testing solar cells, the fixture of the utility model is connected to an external test device through the connection terminals on the flexible conductive skin, and the support plate drives the elastic buffer block and the flexible conductive skin to move toward the solar cell to be tested. The electrical signal measured at the connection point between the flexible conductive skin and the solar cell to be tested is transmitted to the test device; the elastic buffer block provides a buffering effect during the contact process between the flexible conductive skin and the solar cell to be tested, while achieving reliable contact between the flexible conductive skin and the solar cell to be tested, avoiding damage to the solar cell to be tested due to squeezing.
[0017] Furthermore, the flexible contact fixture for solar cells of the utility model further includes a fixing beam;
[0018] The aforementioned support plate is connected to the fixed beam, or the support plate is connected to the fixed beam via an elastic connector;
[0019] The support plate is connected to the fixed beam through an elastic connector. Since the deformation of the elastic buffer block is small and the tolerance to the installation position error is low, the support plate is connected to the fixed beam through an elastic connector. When testing, the fixed beam drives the fixture of the utility model to move toward the solar cell to be tested, and the flexible conductive skin at the front end contacts the solar cell to be tested to obtain an electrical signal. While the elastic buffer block provides a buffering effect, the elastic connector further provides a buffering effect, thereby further improving the buffering performance of the fixture of the utility model during the test process, and avoiding damage to the solar cell to be tested due to squeezing while ensuring reliable contact.
[0020] Furthermore, the flexible contact fixture for solar cells of the utility model further includes a driving mechanism;
[0021] The aforementioned fixed beam is arranged on the driving mechanism; the fixed beam can reciprocate under the action of the driving mechanism. During the test, the driving mechanism drives the fixed beam and the fixture to move toward the solar cell to be tested to achieve electrical contact; after the test is completed, the driving mechanism is reset to separate the fixture from the solar cell to be tested, thereby significantly improving the test efficiency.
[0022] Furthermore, in the flexible contact fixture of the solar cell of the utility model, a voltage contact piece is arranged on the flexible conductive skin; an insulating piece is arranged between the voltage contact piece and the flexible conductive skin to prevent the voltage contact piece from being connected to the carrier. When testing, the voltage contact piece collects voltage signals, and the flexible conductive skin collects current signals; the voltage contact piece collects voltage signals alone to realize Kelvin four-wire collection.
[0023] The flexible contact fixture of the solar cell of the utility model comprises a conductive support plate, an elastic buffer block and a flexible conductive skin;
[0024] The flexible conductive skin is connected to the conductive support plate, including contacting with each other, in order to achieve electrical connection;
[0025] The elastic buffer block is arranged between the conductive support plate and the flexible conductive skin;
[0026] The conductive support plate is provided with connection terminals for externally connecting test equipment.
[0027] When testing solar cells, the fixture of the utility model is connected to an external test device through the connecting terminals on the conductive support plate. The conductive support plate drives the elastic buffer block and the flexible conductive skin to move toward the solar cell to be tested, so that the flexible conductive skin is in contact with the solar cell to be tested. The measured electrical signal is transmitted to the conductive support plate and then transmitted to the test device through the connecting terminals. The elastic buffer block provides a buffering effect during the contact process between the flexible conductive skin and the solar cell to be tested, and while achieving reliable contact between the flexible conductive skin and the solar cell to be tested, damage to the solar cell to be tested caused by squeezing is avoided.
[0028] The flexible contact fixture of the solar cell of the utility model comprises a conductive support plate, an elastic buffer block and a flexible conductive skin;
[0029] The conductive support plate is configured in a groove shape;
[0030] The elastic buffer block is arranged in the flexible conductive skin;
[0031] The flexible conductive skin is arranged in the groove of the conductive support plate.
[0032] When testing solar cells, the flexible conductive skin corresponding to the opening of the conductive support plate groove contacts the solar cell to be tested and generates upward pressure. The flexible conductive skin and the wrapped elastic buffer block are better embedded in the groove of the conductive support plate under the extrusion to avoid falling off. The solar cell to be tested is connected to the conductive support plate through the flexible conductive skin, and finally connected to the test equipment; the flexible conductive skin and the elastic buffer block have soft surface contact with the solar cell to be tested, which is not easy to scratch the surface of the solar cell. At the same time, due to the friction between the flexible conductive skin and the solar cell to be tested, it will be worn. When replacement is needed, the flexible conductive skin can be replaced as a whole from the conductive support plate.
[0033] Furthermore, the flexible contact fixture for solar cells of the utility model also includes a fixing beam and a driving mechanism;
[0034] The conductive support plate is connected to the fixed beam, or the conductive support plate is connected to the fixed beam via an elastic connector;
[0035] The conductive support plate is insulated from the fixed beam.
[0036] The aforementioned fixed beam is arranged on the driving mechanism; the fixed beam can perform reciprocating motion under the action of the driving mechanism.
[0037] Furthermore, in the flexible contact fixture of the solar cell of the utility model, a voltage contact piece is arranged on the flexible conductive skin; an insulating piece is arranged between the voltage contact piece and the flexible conductive skin to prevent the voltage contact piece from being electrically connected to the carrier on which it is located.
[0038] Furthermore, in the flexible contact fixture of the solar cell of the utility model, the conductive support plate includes several sections, at least one of which is set as a voltage collection section, and the rest are current collection sections; thereby, Kelvin four-wire collection is realized; a connecting block is set between the voltage collection section and the current collection section; the connecting block is made of plastic material to ensure insulation between the voltage collection section and the current collection section.
[0039] The flexible contact fixture for solar cells of the utility model uses a flexible conductive skin to make direct contact with the solar cell to be tested, thereby avoiding bump damage to the solar cell to be tested. At the same time, an elastic buffer block is arranged between the flexible conductive skin and the support plate or the conductive support plate, thereby further improving the buffering between the flexible conductive skin and the solar cell to be tested during the test contact process. The utility model has the beneficial effects of low manufacturing cost, simple structure, and easy maintenance, and is suitable for popularization and application. BRIEF DESCRIPTION OF THE DRAWINGS
[0040] Figure 1 This is a schematic diagram of the structure of the flexible contact fixture of the solar cell according to the first embodiment of the utility model;
[0041] Figure 2This is a schematic diagram of the structure of the flexible contact fixture of the solar cell according to the second embodiment of the utility model;
[0042] Figure 3 This is a schematic diagram of the structure of the flexible contact fixture of the solar cell according to the third embodiment of the utility model;
[0043] Figure 4 This is a schematic diagram of the structure of the flexible contact fixture of the solar cell according to the fourth embodiment of the utility model;
[0044] Figure 5 This is a schematic diagram of the structure of the flexible contact fixture of the solar cell according to the fifth embodiment of the utility model;
[0045] Figure 6 This is a schematic diagram of the structure of the flexible contact fixture of the solar cell according to the sixth embodiment of the utility model;
[0046] Among them, 1-support plate, 2-elastic buffer block, 3-flexible conductive skin, 4-voltage contact piece, 5-insulating tape, 6-fixed beam, 7-connection block, 8-elastic connector, 9-conductive support plate, 10-driving mechanism, 11-solar cell to be tested. DETAILED DESCRIPTION
[0047] The flexible contact fixture for solar cells of the present invention is described in detail below through the accompanying drawings and embodiments.
[0048] Embodiment 1
[0049] This embodiment discloses a flexible contact fixture for solar cells, such as Figure 1 As shown, it includes a support plate 1, an elastic buffer block 2 and a flexible conductive skin 3; the flexible conductive skin 3 is a flexible conductive component with a conductive function, which can be specifically conductive cotton, conductive cloth, FPC flexible printed circuit board, or any other metal foil with a conductive function; the elastic buffer block 2 can be selected from sponge strips, foamed cotton strips, rubber strips, silicone strips, etc.; among them, conductive cotton is a common industrial product, which is formed by sponge wrapped with conductive cloth. For specific usage scenarios, in specific applications, the conductive cotton can simultaneously realize the functions of the flexible conductive skin 3 and the elastic buffer block 2. In this embodiment, the flexible conductive skin 3 adopts conductive cloth; the elastic buffer block 2 adopts foamed cotton strips.
[0050] In the disclosed embodiment, the flexible conductive skin 3 is disposed on the elastic buffer block 2; the elastic buffer block 2 is disposed on the support plate 1; and the flexible conductive skin 3 is provided with connection terminals for external test equipment.
[0051] In the disclosed embodiment, the flexible contact fixture of the solar cell further includes a fixing beam 6 ; the aforementioned support plate 1 is connected to the fixing beam 6 via an elastic connector 8 .
[0052] During the test, the fixed beam 6 drives the fixture described in this embodiment to move toward the solar cell 11 to be tested, and the test equipment is connected to the external test terminal on the flexible conductive skin 3. The support plate 1 drives the elastic buffer block 2 and the flexible conductive skin 3 to move toward the solar cell 11 to be tested. The electrical signal measured at the connection point between the flexible conductive skin 3 and the solar cell 11 to be tested is transmitted to the test equipment; the elastic buffer block 2 provides a buffering effect during the contact between the flexible conductive skin 3 and the solar cell 11 to be tested. While the elastic buffer block 2 provides a buffering effect, the elastic connector 8 further provides a buffering effect, thereby further improving the buffering performance of the fixture described in the utility model during the test process, and avoiding damage to the solar cell 11 to be tested due to squeezing while ensuring reliable contact.
[0053] Embodiment 2
[0054] Based on the above-mentioned first embodiment, this embodiment discloses a flexible contact fixture for solar cells, including a support plate 1 , an elastic buffer block 2 and a flexible conductive skin 3 .
[0055] In the embodiments of the present disclosure, Figure 2 As shown, the flexible conductive skin 3 is connected to the support plate 1; the elastic buffer block 2 is arranged between the support plate 1 and the flexible conductive skin 3; the rest of the structure is arranged the same as the aforementioned embodiment 1, and the flexible conductive skin 3 is provided with a connection terminal for external test equipment. The flexible contact fixture of the solar cell also includes a fixed beam 6; the support plate 1 is connected to the fixed beam 6 through an elastic connector 8.
[0056] The testing process is also the same as that of the first embodiment. When conducting the test, the fixed beam 6 drives the fixture of the utility model to move toward the solar cell 11 to be tested, and the test equipment is externally connected through the connection terminal on the flexible conductive skin 3. The support plate 1 drives the elastic buffer block 2 and the flexible conductive skin 3 to move toward the solar cell 11 to be tested. At the junction of the flexible conductive skin 3 and the solar cell 11 to be tested, the measured electrical signal is transmitted to the test equipment; the elastic buffer block 2 provides a buffering effect during the contact between the flexible conductive skin 3 and the solar cell 11 to be tested. While the elastic buffer block 2 provides a buffering effect, the elastic connector 8 further provides a buffering effect, thereby further improving the buffering performance of the fixture of the utility model during the test process, and avoiding the occurrence of damage to the solar cell 11 to be tested due to squeezing while ensuring reliable contact.
[0057] Based on the above disclosure, a voltage contact piece 4 is provided on the flexible conductive skin 3, and an insulating piece is provided between the voltage contact piece 4 and the flexible conductive skin 3. During the test, the current signal is collected through the flexible conductive skin 3; the voltage signal is collected separately through the voltage contact piece 4, and the Kelvin four-wire collection can be realized.
[0058] In a specific application, the voltage contact piece 4 can also be separately arranged on the support plate 1. When testing, the current signal is collected through the flexible conductive skin 3; the voltage signal is separately collected through the voltage contact piece 4 to realize Kelvin four-wire collection.
[0059] Embodiment 3
[0060] This embodiment discloses a flexible contact fixture for solar cells, including a conductive support plate 9, an elastic buffer block 2 and a flexible conductive skin 3; in this embodiment, as Figure 3 As shown, the flexible conductive skin 3 is connected to the conductive support plate 9; the elastic buffer block 2 is arranged between the conductive support plate 9 and the flexible conductive skin 3; the conductive support plate 9 is provided with a connection terminal for an external test device; and also includes a fixed beam 6; the conductive support plate 9 is connected to the fixed beam 6.
[0061] When testing solar cells, the fixture described in this embodiment is connected to an external test device through the connection terminals on the conductive support plate 9, the fixed beam 6 drives the fixture described in this embodiment to move, and the conductive support plate 9 drives the elastic buffer block 2 and the flexible conductive skin 3 to move toward the solar cell 11 to be tested, so that the flexible conductive skin 3 is in contact with the solar cell 11 to be tested, and the flexible conductive skin 3 collects current signals, and the measured current signals are transmitted to the conductive support plate 9 and then transmitted to the test device through the connection terminals. The elastic buffer block 2 provides a buffering effect during the contact process between the flexible conductive skin 3 and the solar cell 11 to be tested, and while achieving reliable contact between the flexible conductive skin 3 and the solar cell 11 to be tested, it avoids damage to the solar cell 11 to be tested due to squeezing.
[0062] Embodiment 4
[0063] This embodiment discloses a flexible contact fixture for solar cells, including a conductive support plate 9, an elastic buffer block 2 and a flexible conductive skin 3; in this embodiment, as Figure 4 As shown, the conductive support plate 9 is configured to be groove-shaped, and the elastic buffer block 2 is wrapped in the flexible conductive skin 3; the flexible conductive skin 3 is snapped into the groove of the conductive support plate 9, and is in contact and connected with the conductive support plate 9 to achieve electrical connection; the conductive support plate 9 is provided with a connection terminal for an external test device; the flexible conductive skin 3 is provided with a voltage contact piece 4, and an insulating piece is provided between the voltage contact piece 4 and the flexible conductive skin 3, and the insulating piece in this embodiment is an insulating tape 5; it also includes a fixed beam 6; the aforementioned conductive support plate 9 is connected to the fixed beam 6.
[0064] When testing solar cells, the fixture described in this embodiment is connected to an external test device through the connection terminals on the conductive support plate 9, and the fixed beam 6 drives the fixture described in this embodiment to move. The conductive support plate 9 drives the elastic buffer block 2 and the flexible conductive skin 3 to move toward the solar cell 11 to be tested, so that the flexible conductive skin 3 is in contact with the solar cell 11 to be tested. The flexible conductive skin 3 collects current signals, transmits them to the conductive support plate 9, and then transmits them to the test equipment through the connection terminals; the voltage contact piece 4 collects voltage signals separately to achieve Kelvin four-wire collection. The elastic buffer block 2 provides a buffering effect during the contact between the flexible conductive skin 3 and the solar cell 11 to be tested, while achieving reliable contact between the flexible conductive skin 3 and the solar cell 11 to be tested, and avoids damage to the solar cell 11 to be tested due to squeezing. Due to the friction between the flexible conductive skin 3 and the solar cell, it will be worn. When replacement is required, the flexible conductive skin 3 can be replaced as a whole from the groove-shaped conductive support plate 9.
[0065] Embodiment 5
[0066] Based on the above fourth embodiment, this embodiment discloses a flexible contact fixture for solar cells, such as Figure 5 As shown, it includes a conductive support plate 9, an elastic buffer block 2 and a flexible conductive skin 3; in the embodiment of the present disclosure, the flexible conductive skin 3 is in contact with and connected to the conductive support plate 9 to achieve electrical connection; the conductive support plate 9 is configured to be groove-shaped, and the elastic buffer block 2 is wrapped in the flexible conductive skin 3; the conductive support plate 9 is provided with connection terminals for external test equipment.
[0067] The embodiment of the present disclosure further includes a fixed beam 6 ; the conductive support plate 9 is connected to the fixed beam 6 via an elastic connector 8 ; and the conductive support plate 9 and the fixed beam 6 are insulated from each other.
[0068] In the example disclosed in the present disclosure, the conductive support plate 9 includes three sections, one of which is set as a voltage collection section, and the rest are current collection sections; thereby, Kelvin four-wire collection is realized; a connecting block 7 is set between the voltage collection section and the current collection section.
[0069] The test process is based on Example 4. The fixed beam 6 drives the fixture described in this embodiment to move, and the conductive support plate 9 drives the elastic buffer block 2 and the flexible conductive skin 3 to move toward the solar cell 11 to be tested, so that the flexible conductive skin 3 is in contact with the solar cell 11 to be tested. The flexible conductive skin 3 measures the electrical signal and transmits it to the conductive support plate 9, and then transmits it to the test equipment through the connecting terminal; the conductive support plate 9 includes three sections, one of which is set as a voltage collection section, and the rest are current collection sections, realizing Kelvin four-wire collection; the elastic buffer block 2 provides a buffering effect during the contact between the flexible conductive skin 3 and the solar cell 11 to be tested. While the elastic buffer block 2 provides a buffering effect, the elastic connector 8 further provides a buffering effect, thereby further improving the buffering performance of the fixture described in the utility model during the test process, and avoiding the occurrence of damage to the solar cell 11 to be tested due to squeezing while ensuring reliable contact.
[0070] Embodiment 6
[0071] Based on the above fourth embodiment, this embodiment discloses a flexible contact fixture for solar cells, such as Figure 6 As shown, the difference from the fourth embodiment is that it also includes a driving mechanism 10; the aforementioned fixed beam 6 is arranged on the driving mechanism 10; the fixed beam 6 can reciprocate under the action of the driving mechanism 10. At the same time, two sets of flexible contact clamps are provided in this embodiment, which are used in pairs, one set collects positive electrodes and the other set collects negative electrodes, forming a collection closed loop.
[0072] When testing, the same structure test process is the same as that of the fourth embodiment. The driving mechanism 10 drives the fixed beam 6 and the fixture to move toward the solar cell 11 to be tested to achieve electrical contact. In the disclosed embodiment, the voltage contact piece 4 is arranged on the flexible conductive skin 3, and an insulating piece is arranged between the voltage contact piece 4 and the flexible conductive skin 3. The insulating piece in this embodiment is an insulating tape 5. The flexible conductive skin 3 collects the current signal, transmits it to the conductive support plate 9, and then transmits it to the test equipment through the connecting terminal. The voltage contact piece 4 collects the voltage signal alone. After the test is completed, the driving mechanism 10 is reset to separate the fixture from the solar cell 11 to be tested, thereby significantly improving the test efficiency.
Claims
1. A flexible contact fixture for solar cells, characterized in that: It includes a support plate, an elastic buffer block and a flexible conductive skin; The flexible conductive skin is arranged on the elastic buffer block; The elastic buffer block is arranged on the support plate; The flexible conductive skin is provided with connection terminals for externally connecting testing equipment.
2. A flexible contact fixture for solar cells, characterized in that: It includes a support plate, an elastic buffer block and a flexible conductive skin; The flexible conductive skin is connected to the support plate; The elastic buffer block is arranged between the aforementioned support plate and the flexible conductive skin; The flexible conductive skin is provided with connection terminals for externally connecting testing equipment.
3. The flexible contact fixture for solar cells according to claim 1 or 2, characterized in that: Also included is a fixed beam; The aforementioned support plate is connected to the fixed beam, or the support plate is connected to the fixed beam via an elastic connector.
4. The flexible contact fixture for solar cells according to claim 3, characterized in that: Also includes a drive mechanism; The aforementioned fixed beam is arranged on the driving mechanism; the fixed beam can perform reciprocating motion under the action of the driving mechanism.
5. The flexible contact fixture for solar cells according to claim 1 or 2, characterized in that: A voltage contact piece is arranged on the flexible conductive skin; an insulating piece is arranged between the voltage contact piece and the flexible conductive skin.
6. A flexible contact fixture for solar cells, characterized in that: It includes a conductive support plate, an elastic buffer block and a flexible conductive skin; The flexible conductive skin is connected to the conductive support plate; The elastic buffer block is arranged between the conductive support plate and the flexible conductive skin; The conductive support plate is provided with connection terminals for externally connecting test equipment.
7. A flexible contact fixture for solar cells, characterized in that: It includes a conductive support plate, an elastic buffer block and a flexible conductive skin; The conductive support plate is configured in a groove shape; The elastic buffer block is arranged in the flexible conductive skin; The flexible conductive skin is arranged in the groove of the conductive support plate.
8. The flexible contact fixture for solar cells according to claim 6 or 7, characterized in that: Also included are a fixed beam and a drive mechanism; The conductive support plate is connected to the fixed beam, or the conductive support plate is connected to the fixed beam via an elastic connector; The conductive support plate and the fixed beam are insulated from each other; The aforementioned fixed beam is arranged on the driving mechanism; the fixed beam can perform reciprocating motion under the action of the driving mechanism.
9. The flexible contact fixture for solar cells according to claim 8, characterized in that: A voltage contact piece is arranged on the flexible conductive skin; an insulating piece is arranged between the voltage contact piece and the flexible conductive skin.
10. The flexible contact fixture for solar cells according to claim 9, characterized in that: The conductive support plate includes a plurality of sections, at least one of which is set as a voltage collection section, and the rest are current collection sections; a connecting block is set between the voltage collection section and the current collection section.