Detection device

Abstract

The utility model relates to a detection device which comprises a body and a probe, the body is provided with a cavity and an adsorption hole communicated with the cavity, the body is used for bearing a battery piece so that the adsorption hole can be covered with the battery piece, the body has a first state and a second state, when the body is in the first state, the cavity is a vacuum cavity so as to adsorb the battery piece and enable the battery piece to be attached to the body, and when the body is in the second state, the cavity is a vacuum cavity; in the second state, the adsorption holes are communicated with the outside and the cavity, and a gap is formed between the body and the battery piece; the probe is partially arranged in the cavity, partially penetrates through the adsorption hole and is arranged outside the body, and the probe is used for being in contact with the battery piece in the first state. Compared with an existing detection device, the body and the battery piece can be tightly attached through the adsorption principle, a pressing device does not need to be arranged, the utilization rate of light received by the front face of the battery piece is reduced, and the short-circuit current and the quantum conversion efficiency are improved. And the probe penetrates through the adsorption hole to be in contact with the battery piece, and the empty adsorption hole is close to the probe, so that the torque is reduced, and the adsorption effect is improved.

Description

Technical Field

[0001] The present application relates to the technical field of battery detection, and in particular to a detection device. Background Art

[0002] When testing back-contact solar cells, a clamping device is installed in a certain area on the front of the cell to apply pressure. This pressure retracts the test probes, allowing the cell to contact the probes and detect the short-circuit current. In related technologies, this device blocks light during testing, affecting light utilization. This reduced light utilization also reduces short-circuit current and quantum conversion efficiency. Utility Model Content

[0003] Based on this, it is necessary to provide a detection device to address the problem of battery short-circuit current detection.

[0004] A detection device, comprising:

[0005] A body having a chamber and an adsorption hole connected to the chamber, the body being used to carry a battery cell so that the battery cell cover is placed on the adsorption hole, the body having a first state and a second state. When in the first state, the chamber is a vacuum chamber to adsorb the battery cell and make it adhere to the body. When in the second state, the adsorption hole connects the outside and the chamber, and a gap is formed between the body and the battery cell.

[0006] A probe is partially disposed in the chamber and partially disposed outside the body through the adsorption hole. The probe is used to contact the battery cell in the first state.

[0007] The above-mentioned detection device is provided with an adsorption hole on the main body. When the battery cell is placed on the main body, the battery cell cover is located above the adsorption hole. When the main body is in a first state, the chamber is a vacuum chamber. Under the action of the internal and external pressure difference, the battery cell and the main body are tightly fitted. When the main body is in a second state, the adsorption hole connects the outside and the chamber. At this time, the air pressure in the chamber is the same as the external atmospheric pressure, and there is a gap between the battery cell and the main body. The probe is partially set in the chamber and partially set outside the main body through the adsorption hole. When the main body is in the first state, that is, when the battery cell and the main body are tightly fitted, the probe contacts the battery cell, thereby detecting the short-circuit current of the battery cell. Compared with existing detection devices, the detection device provided by this application can make the main body and the battery cell tightly fit through the adsorption principle, without the need for a clamping device, reducing the utilization rate of the light received by the front of the battery cell, and improving the short-circuit current and quantum conversion efficiency. In addition, the probe contacts the battery cell through the adsorption hole, and the empty adsorption hole is close to the probe, which reduces the torque and improves the adsorption effect.

[0008] In one embodiment, a cooling water channel is provided on a wall surface of the body that contacts the battery cell, and the cooling water channel is used to accommodate cooling water.

[0009] In one embodiment, the body includes a shell and a cover plate connected to each other, and a water inlet and the cooling water channel are provided on the cover plate, and the cooling water can flow into the cooling water channel through the water inlet.

[0010] In one embodiment, a plurality of cooling water channels are provided, and an adsorption hole is sandwiched between two adjacent cooling water channels.

[0011] In one embodiment, the cooling water channel is in a ring shape and extends around the circumference of the adsorption hole.

[0012] In one embodiment, a plurality of probes are provided, and a plurality of probes are provided in each of the adsorption holes.

[0013] In one embodiment, the probes in each of the adsorption holes are arranged at intervals along a first direction, and the first direction is the length direction of the adsorption hole.

[0014] In one embodiment, the probes arranged in each adsorption hole along the first direction are a group of probe assemblies, and multiple groups of probe assemblies are provided. The multiple groups of probe assemblies are arranged at intervals along the second direction, and the second direction is perpendicular to the first direction.

[0015] In one embodiment, the body includes an outer shell and a cover plate, the outer shell is arranged to form the chamber, the cover plate is connected to the outer shell to seal the chamber, the adsorption holes are provided on the cover plate, and the battery cell is provided on the side of the cover plate away from the outer shell.

[0016] In one embodiment, the present invention further includes a probe plate disposed in the chamber, and the probe is installed on the probe plate. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a schematic diagram of the structure of the battery cell provided in an embodiment of the present application when it is not adsorbed onto the detection device.

[0018] Figure 2 This is a schematic diagram of the structure of the battery cell and the detection device provided in an embodiment of the present application when they are adsorbed.

[0019] Figure 3 A schematic diagram of the structure of the detection device provided in an embodiment of the present application.

[0020] Figure 4 This is a schematic diagram of the structure of the cooling water channel provided on the cover plate provided in an embodiment of the present application.

[0021] Figure 5 Schematic diagram of the structure of the probe passing through the adsorption hole provided in the embodiment of the present application.

[0022] In the picture:

[0023] 100, body; 110, housing; 111, chamber; 120, cover; 121, adsorption hole; 122, water inlet;

[0024] 200, probe; 210, probe plate;

[0025] 300. Cooling water channel;

[0026] 400. Battery cells. DETAILED DESCRIPTION

[0027] To make the above-mentioned objects, features, and advantages of the present application more clearly understood, the specific embodiments of the present application are described in detail below with reference to the accompanying drawings. The following description sets forth many specific details to facilitate a full understanding of the present application. However, the present application can be implemented in many other ways than those described herein, and those skilled in the art can make similar improvements without violating the scope of the present application. Therefore, the present application is not limited to the specific embodiments disclosed below.

[0028] In the description of this application, it should be understood that if 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", etc. appear, the orientation or position relationship indicated by these terms is based on the orientation or position relationship shown in the accompanying drawings, which is only for the convenience of describing this application and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on this application.

[0029] In addition, if the terms "first" or "second" appear, these terms are used for descriptive purposes only and should not be understood to indicate or imply relative importance or implicitly specify the number of technical features indicated. Therefore, a feature specified as "first" or "second" may explicitly or implicitly include at least one of such features. In the description of this application, if the term "plurality" appears, "plurality" means at least two, for example, two, three, etc., unless otherwise specifically defined.

[0030] In this application, unless otherwise specified or limited, the terms "mounted," "connected," "connected," "fixed," etc., should be interpreted broadly. For example, these terms may refer to fixed connections, removable connections, or integration; mechanical connections or electrical connections; direct connections or indirect connections through an intermediary; and internal communication between two components or interaction between two components, unless otherwise specified. Those skilled in the art will understand the specific meanings of these terms in this application based on the specific circumstances.

[0031] In this application, unless otherwise expressly specified or limited, if a first feature is described as being "above" or "below" a second feature, or similar descriptions, this may mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediate medium. Furthermore, when a first feature is described as being "above," "above," or "above" a second feature, it may mean that the first feature is directly above or diagonally above the second feature, or simply means that the first feature is at a higher level than the second feature. When a first feature is described as being "below," "below," or "below" a second feature, it may mean that the first feature is directly below or diagonally below the second feature, or simply means that the first feature is at a lower level than the second feature.

[0032] It should be noted that if an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be an intermediate element. If an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be an intermediate element. If any, the terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used in this application are for illustrative purposes only and do not represent the only embodiment.

[0033] When testing back-contact solar cells, a clamping device is installed in a certain area on the front of the cell to apply pressure to the cell. When the force is applied to the cell, the test probe 200 retracts, and the cell contacts the probe 200, allowing the short-circuit current to be detected. In related art, the clamping device on the front of the cell 400 is generally made of highly transparent material to balance the pressure of the back-contact probe 200. However, the clamping device blocks light during testing, affecting light utilization. Reduced light utilization also reduces short-circuit current and quantum conversion efficiency.

[0034] In order to solve the above problems, Figures 1 to 5As shown, the present application provides a detection device, which includes a main body 100 and a probe 200. The main body 100 has a chamber 111 and an adsorption hole 121 connected to the chamber 111. The main body 100 is used to carry the battery cell 400 so that the battery cell 400 is covered on the adsorption hole 121. The main body 100 has a first state and a second state. When in the first state, the chamber 111 is a vacuum chamber to adsorb the battery cell 400 and make it fit to the main body 100. When in the second state, the adsorption hole 121 connects the outside world and the chamber 111, and there is a gap between the main body 100 and the battery cell 400; the probe 200 is partially arranged in the chamber 111 and partially passes through the adsorption hole 121 and is arranged outside the main body 100. The probe 200 is used to contact the battery cell 400 in the first state.

[0035] The above-mentioned detection device has an adsorption hole 121 provided on the main body 100. When the battery cell 400 is placed on the main body 100, the battery cell 400 is covered above the adsorption hole 121. When the main body 100 is in the first state, the chamber 111 is a vacuum chamber. Under the action of the internal and external pressure difference, the battery cell 400 and the main body 100 are tightly fitted. When the main body 100 is in the second state, the adsorption hole 121 connects the outside world and the chamber 111. At this time, the air pressure in the chamber 111 is the same as the external atmospheric pressure, and a gap exists between the battery cell 400 and the main body 100. The probe 200 is partially disposed within the chamber 111 and partially passes through the adsorption hole 121 and is disposed outside the main body 100. When the main body 100 is in the first state, that is, when the battery cell 400 and the main body 100 are tightly fitted, the probe 200 contacts the battery cell 400, thereby detecting the short-circuit current of the battery cell 400. Compared to existing detection devices, the detection device provided by this application uses the principle of adsorption to tightly fit the body 100 and the cell 400, eliminating the need for a clamping device. This reduces the utilization of light received by the front of the cell 400, improving short-circuit current and quantum conversion efficiency. Furthermore, the probe 200 contacts the cell 400 through the adsorption holes 121, and the proximity of the empty adsorption holes 121 to the probe 200 reduces torque and improves the adsorption effect.

[0036] Specifically, if Figures 1 to 5As shown, the body 100 includes a housing 110 and a cover plate 120. The housing 110 encloses a chamber 111. The cover plate 120 is connected to the housing 110 to seal the chamber 111. The cover plate 120 is provided with adsorption holes 121. The battery cell 400 is disposed on the side of the cover plate 120 facing away from the housing 110. The housing 110 encloses the chamber 111, and the cover plate 120 is connected to the housing 110 to seal the chamber 111. The adsorption holes 121 are provided on the cover plate 120 to connect the chamber 111 with the outside world. When it is necessary to detect the battery cell 400, the cell is set on the side of the cover 120 away from the outer shell 110, and the state of the chamber 111 is adjusted so that the main body 100 is in the first state. At this time, under the action of the internal and external pressure difference, the battery cell 400 and the main body 100 are tightly fitted, and as the battery cell 400 and the main body 100 are fitted, the probe 200 contacts the battery cell 400, thereby detecting the short-circuit current of the battery cell 400.

[0037] When adjusting the state of the chamber 111 , the battery cell 400 is placed on the side of the cover 120 away from the housing 110 , and then a vacuum pump is used to pump the gas pressure in the chamber 111 to a state lower than normal pressure, thereby making the chamber 111 a vacuum chamber.

[0038] Specifically, if Figures 1 to 5 As shown, the detection device further includes a probe card disposed in the chamber 111 , on which the probes 200 are mounted. The probe card is mounted in the chamber 111 to facilitate mounting of the probes 200 .

[0039] The battery cell will generate heat during testing. When the test frequency is high, the battery cell 400 and the test device need to be cooled. The existing technology uses semiconductor cooling, but the semiconductor temperature control effect is not good and cannot be kept constant at the temperature required for the test. Therefore, accurate temperature control of the test device is particularly important.

[0040] For this reason, Figures 1 to 5 As shown, the wall surface of the body 100 that contacts the battery cells 400 is provided with a cooling water channel 300 for accommodating cooling water. By providing the cooling water channel 300 on the wall surface that contacts the battery cells 400 and providing cooling water in the cooling water channel 300, when the battery cells 400 generate heat, the heat is transferred to the cooling water channel 300, thereby cooling the battery cells 400.

[0041] Specifically, if Figures 1 to 5As shown, the body 100 includes a connected housing 110 and a cover plate 120. The cover plate 120 is provided with a water inlet 122 and a cooling water channel 300. Cooling water can flow into the cooling water channel 300 through the water inlet 122. Because the battery cells 400 are arranged on the side of the cover plate 120 facing away from the body 100, the cooling water channel 300 is laid on the cover plate 120, and the water inlet 122 is provided on the cover plate 120, so that cooling water can flow into the cooling water channel 300 through the water inlet 122.

[0042] In some embodiments, a water outlet is provided on the cover plate 120 so that cooling water can be discharged in sequence through the water inlet 122 , the cooling water channel 300 , and the water outlet.

[0043] In some embodiments, a water outlet may not be provided. After the inspection is completed, the battery cell 400 and the main body 100 are separated, and then the cover plate 120 and the shell 110 are separated. At this time, the water inlet 122 is opened to allow the cooling water in the cooling water channel 300 to be discharged through the water inlet 122.

[0044] Specifically, if Figures 1 to 5 As shown, a plurality of cooling water channels 300 are provided, and an adsorption hole 121 is sandwiched between two adjacent cooling water channels 300. A plurality of cooling water channels 300 are provided, and an adsorption hole 121 is sandwiched between two adjacent cooling water channels 300, thereby improving cooling efficiency.

[0045] Specifically, if Figures 1 to 5 As shown, the cooling water channel 300 is in a ring shape and extends around the circumference of the adsorption hole 121. The cooling water channel 300 is arranged in a ring shape and around the adsorption hole 121, thereby improving the cooling efficiency.

[0046] Specifically, if Figures 1 to 5 As shown, the adsorption hole 121 is an elongated hole. The size of the adsorption hole 121 is larger than the size of the probe 200 , thereby reducing the possibility of a short circuit caused by the contact between the probe 200 and the cover plate 120 .

[0047] Specifically, if Figures 1 to 5 As shown, a plurality of adsorption holes 121 are provided.

[0048] More specifically, if Figures 1 to 5 As shown, multiple probes 200 are provided, and multiple probes 200 are provided in each adsorption hole 121. Multiple probes 200 are provided in each adsorption hole 121, that is, multiple probes 200 in each adsorption hole 121 can contact the battery cell 400, thereby improving the detection accuracy.

[0049] More specifically, if Figures 1 to 5As shown, the probes 200 in each adsorption hole 121 are arranged at intervals along a first direction, where the first direction is the length direction of the adsorption hole 121. The probes 200 arranged along the first direction in each adsorption hole 121 constitute a probe assembly, and multiple probe assemblies are provided. The multiple probe assemblies are arranged at intervals along a second direction, which is perpendicular to the first direction. The multiple probes 200 in the adsorption hole 121 are arranged along the first direction, and the probes 200 arranged along the first direction in each adsorption hole 121 constitute a probe assembly. Multiple probe assemblies are provided, that is, the probes 200 in each adsorption hole 121 are arranged in an array.

[0050] The technical features of the above-mentioned embodiments can be combined arbitrarily. In order to make the description concise, not all possible combinations of the technical features in the above-mentioned embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0051] The above-described embodiments merely represent several implementation methods of the present application. While the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent application. It should be noted that a person of ordinary skill in the art may make various modifications and improvements without departing from the spirit of the present application, and these modifications and improvements fall within the scope of protection of the present application. Therefore, the scope of protection of the present patent application shall be determined by the appended claims.

Claims

1. A detection device, characterized in that: The detection device comprises: A body (100) having a chamber (111) and an adsorption hole (121) connected to the chamber (111); the body (100) is used to carry a battery cell (400) so that the battery cell (400) is covered on the adsorption hole (121); the body (100) has a first state and a second state; when in the first state, the chamber (111) is a vacuum chamber to adsorb the battery cell (400) and make it adhere to the body (100); when in the second state, the adsorption hole (121) is connected to the outside and the chamber (111); and a gap is provided between the body (100) and the battery cell (400); A probe (200) is partially disposed in the chamber (111) and partially passes through the adsorption hole (121) and is disposed outside the body (100). The probe (200) is used to contact the battery cell (400) in the first state.

2. The detection device according to claim 1, characterized in that A cooling water channel (300) is provided on a wall surface of the body (100) in contact with the battery cell (400), and the cooling water channel (300) is used to accommodate cooling water.

3. The detection device according to claim 2, characterized in that The body (100) comprises a shell (110) and a cover plate (120) connected to each other. A water inlet (122) and the cooling water channel (300) are provided on the cover plate (120). The cooling water can flow into the cooling water channel (300) through the water inlet (122).

4. The detection device according to claim 2, characterized in that A plurality of cooling water channels (300) are provided, and an adsorption hole (121) is sandwiched between two adjacent cooling water channels (300).

5. The detection device according to claim 2, characterized in that The cooling water channel (300) is ring-shaped and extends around the circumference of the adsorption hole (121).

6. The detection device according to claim 1, characterized in that A plurality of the probes (200) are provided, and a plurality of the probes (200) are provided in each of the adsorption holes (121).

7. The detection device according to claim 6, characterized in that The probes (200) in each of the adsorption holes (121) are arranged at intervals along a first direction, and the first direction is the length direction of the adsorption hole (121).

8. The detection device according to claim 7, characterized in that The probes (200) arranged along the first direction in each adsorption hole (121) constitute a group of probe assemblies. The probe assemblies are provided in multiple groups, and the multiple groups of probe assemblies are arranged at intervals along a second direction, and the second direction is perpendicular to the first direction.

9. The detection device according to claim 1, characterized in that The body (100) comprises a shell (110) and a cover plate (120), wherein the shell (110) is arranged to enclose the chamber (111), the cover plate (120) is connected to the shell (110) to seal the chamber (111), the adsorption hole (121) is provided on the cover plate (120), and the battery cell (400) is arranged on a side of the cover plate (120) facing away from the shell (110).

10. The detection device according to claim 1, characterized in that: It also includes a probe board arranged in the chamber (111), and the probe (200) is installed on the probe board.

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