Tool for detecting performance of piece to be detected

Abstract

The utility model provides a tool for detecting the performance of a to-be-detected piece, and the tool comprises a sealing cavity which is configured to be of a cavity structure with the interior capable of being sealed; the insulation filling body is filled in the sealing cavity and is used for fixing a to-be-tested piece, and the to-be-tested piece is a battery or a battery cell; the temperature sensor is arranged in the sealing cavity and is used for detecting the temperature of the to-be-detected piece during charging and discharging and transmitting temperature information to external detection equipment; and the pressure sensor is arranged in the sealing cavity, and the pressure sensor is used for detecting the pressure of the to-be-detected piece during charging and discharging and transmitting pressure information to external detection equipment. According to the tool, the temperature sensor and the pressure sensor are arranged to accurately test the temperature and the pressure of the to-be-tested piece, the test accuracy is improved, and the operation is simpler.

Description

Technical Field

[0001] The present disclosure relates to the technical field of battery performance detection, and in particular to a tool for detecting the performance of a test piece. Background Art

[0002] With the continuous development of the new energy industry, the safety of lithium-ion power batteries, as the core energy supply device of new energy vehicles, directly affects the safety performance of new energy vehicles, so safety testing of power batteries is an indispensable part of its production process. When lithium-ion batteries are charging and discharging, the internal working environment is directly related to the safety performance of lithium batteries. Therefore, when testing battery performance, it is necessary to clearly understand the internal environmental state of the battery during charging and discharging, such as internal pressure, temperature, etc., to provide detailed data for improving battery performance.

[0003] At present, the temperature of the battery during charging and discharging is mainly tested by using thermocouples to test the battery shell or poles, which cannot effectively stick to the battery poles and cannot effectively detect the temperature of the poles during charging and discharging, resulting in inaccurate test data. There is no better test method for testing the internal air pressure of the battery during charging and discharging. It is mainly controlled by explosion-proof valves to achieve the effect of early pressure relief. Utility Model Content

[0004] The present disclosure provides a tool for detecting the performance of a test piece, so as to at least solve one of the technical problems existing in the prior art.

[0005] According to a first aspect of the present disclosure, there is provided a tool for detecting the performance of a test piece, comprising:

[0006] The sealed cavity is configured as a cavity structure with a sealable interior;

[0007] An insulating filling body, filled in the sealed cavity, and used to fix the device to be tested, wherein the device to be tested is a battery or a battery cell;

[0008] A temperature sensor is arranged inside the sealed cavity, and is used to detect the temperature of the test piece during charging and discharging and transmit the temperature information to an external detection device;

[0009] The pressure sensor is arranged inside the sealed cavity, and is used to detect the pressure of the test piece during charging and discharging and transmit the pressure information to an external detection device.

[0010] In one possible implementation manner, a groove is formed on the insulating filling body, and the groove is matched with the device to be tested and is used to fix the device to be tested.

[0011] In one embodiment, it also includes a tab pressure plate assembly, which is installed on the insulating filling body, and the tab pressure plate assembly is configured to have a pressing force on the tab of the test piece, and the tab pressure plate assembly is used to connect with the detection equipment to enable the detection equipment to charge and discharge the test piece.

[0012] In one embodiment, the pole tab pressure plate assembly includes a first pole tab pressure plate and a second pole tab pressure plate, the first pole tab pressure plate is fixed on the insulating filling body, the second pole tab pressure plate is stacked on the first pole tab pressure plate and can move relative to the first pole tab pressure plate, and the second pole tab pressure plate has a downward pressing force on the first pole tab pressure plate.

[0013] In one embodiment, the second pole tab pressure plate is provided with an opening along its length direction, the first pole tab pressure plate is provided with a first threaded hole, and a second threaded hole is provided at a corresponding position of the insulating filling body, and the second pole tab pressure plate and the first pole tab pressure plate are fixed to the insulating filling body by a fixing member passing through the opening, the first threaded hole and the second threaded hole in sequence.

[0014] In one embodiment, a pressure relief valve is further included, which is connected to the sealed cavity and is configured to relieve the pressure inside the sealed cavity when opened and maintain the pressure inside the sealed cavity when closed.

[0015] In one possible implementation manner, it further includes an aviation plug, wherein a plurality of aviation plugs are provided, and the plurality of aviation plugs are all sealedly connected to the sealed cavity, and the temperature sensor, the pressure sensor and the test piece are all connected to the detection device via the aviation plug.

[0016] In one possible implementation manner, it further includes a tooling shell, a flange assembly and a base, and the sealed cavity is a cavity structure sealed and enclosed by the tooling shell, the flange assembly and the base.

[0017] In one embodiment, the flange assembly includes an upper flange and a lower flange, the lower flange is fixed to the upper end of the tooling shell, the upper flange is fixedly stacked on the lower flange by a fixing member, and an O-ring is provided between the two to form the sealed cavity.

[0018] In one possible implementation manner, an aviation plug and a pressure relief valve are installed on the upper flange.

[0019] Compared with the prior art, the advantages of the present application are: 1) The tooling of the present application can accurately test the temperature and pressure of the test piece by setting a temperature sensor and a pressure sensor, thereby improving the accuracy of the test data and making the operation simpler; 2) The tooling of the present application can be applied to the performance test of batteries such as square batteries, cylindrical batteries, and soft-pack batteries; 3) The tooling of the present application can directly test the battery cell or battery to improve the test efficiency. It should be understood that the content described in this section is not intended to identify the key or important features of the embodiments of the present disclosure, nor is it intended to limit the scope of the present disclosure. Other features of the present disclosure will become easy to understand through the following description. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The above and other objects, features and advantages of the exemplary embodiments of the present disclosure will become readily understood by reading the detailed description below with reference to the accompanying drawings. In the accompanying drawings, several embodiments of the present disclosure are shown in an exemplary and non-limiting manner, in which:

[0021] In the drawings, the same or corresponding reference numerals represent the same or corresponding parts.

[0022] Figure 1 A schematic diagram of the structure of a tool for detecting the performance of a test piece according to an embodiment of the present disclosure is shown;

[0023] Figure 2 An exploded schematic diagram of a tool for detecting the performance of a test piece according to an embodiment of the present disclosure is shown;

[0024] Figure 3 A schematic diagram showing the disassembly of a tooling for detecting the performance of a piece to be tested after the piece to be tested is installed according to an embodiment of the present disclosure;

[0025] Figure 4 The working process of a tool for detecting the performance of a test piece according to an embodiment of the present disclosure is shown. Figure 1 ;

[0026] Figure 5 A schematic diagram showing the structure of a device under test according to an embodiment of the present disclosure is shown;

[0027] Figure 6 The working process of a tool for detecting the performance of a test piece according to an embodiment of the present disclosure is shown. Figure 2 ;

[0028] Figure 7 The working process of a tool for detecting the performance of a test piece according to an embodiment of the present disclosure is shown. Figure 3 .

[0029] Explanation of the numbers in the figure: sealing cavity 1, tooling housing 11, flange assembly 12, upper flange 121, lower flange 122, fixing part 123, O-ring 124, O-groove 125, base 13, insulating filling body 2, groove 21, mounting groove 22, temperature sensor 3, pressure sensor 4, test piece 5, pole ear 51, pole ear pressure plate assembly 6, first pole ear pressure plate 61, first threaded hole 611, second pole ear pressure plate 62, opening 621, pressure relief valve 7, aviation plug 8. DETAILED DESCRIPTION

[0030] In order to make the purpose, features, and advantages of the present disclosure more obvious and easy to understand, the technical solutions in the embodiments of the present disclosure will be clearly and completely described below in conjunction with the drawings in the embodiments of the present disclosure. Obviously, the described embodiments are only part of the embodiments of the present disclosure, not all of the embodiments. Based on the embodiments in the present disclosure, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present disclosure.

[0031] According to an embodiment of the present disclosure, the utility model provides a tool for detecting the performance of a test piece, such as Figure 1-3 As shown, the tooling for detecting the performance of the test piece includes:

[0032] The sealed cavity 1 is configured as a cavity structure with a sealable interior;

[0033] An insulating filling body 2 is filled in the sealed cavity 1, and is used to fix the device to be tested 5, wherein the device to be tested is a battery or a battery cell;

[0034] The temperature sensor 3 is arranged inside the sealed cavity 1, and is used to detect the temperature of the test piece 5 during charging and discharging and transmit the temperature information to an external detection device;

[0035] The pressure sensor 4 is arranged inside the sealed cavity 1. The pressure sensor 4 is used to detect the pressure of the test piece during charging and discharging and transmit the pressure information to an external detection device.

[0036] The tooling of the present application is provided with a sealed cavity 1, and a temperature sensor 3 and a pressure sensor 4 are provided in the sealed cavity 1. The temperature sensor 3 is provided with at least one, and the test end of the temperature sensor can be fixedly attached to a preset position of the test piece to test the temperature of the test piece during charging and discharging, wherein the test end of the temperature sensor can be closely attached to the pole piece or pole of the test piece, and the test piece can be a cell or a battery. If the test piece is a cell, the pole piece temperature of the cell can be directly tested, or the test piece can be a battery, such as a cylindrical battery, and the temperature sensor tests the pole temperature of the cylindrical battery. Therefore, according to the type of the test piece and the position to be tested, the number of temperature sensors can be increased accordingly and the attachment position of the test end of the temperature sensor can be adjusted.

[0037] The pressure sensor is used to detect the pressure of the test piece during charging and discharging. Therefore, the tooling of the present application can accurately test the temperature and pressure of the test piece by setting the temperature sensor and the pressure sensor, thereby improving the accuracy of the test and making the operation simpler; the tooling of the present application can be applicable to the performance testing of batteries such as square batteries, cylindrical batteries, and soft-pack batteries; the tooling of the present application can directly test the battery cells or batteries, thereby improving the test efficiency.

[0038] For example, the insulating filler 2 is provided with a groove 21, which is arranged along the length direction of the insulating filler 2, and the shape of the groove 21 is adapted to the test piece 5, and is used to fix the test piece 5. The insulating filler 2 can be made of polypropylene (PP), polyethylene (PE) or polyvinyl fluoride (PTFE).

[0039] Alternatively, the tooling of the present application may be configured to be based on the requirements of the test piece to be tested. For example, if the test piece is a battery, electrolyte may be added into the sealed cavity according to the battery requirements.

[0040] In one embodiment, the tooling of the present application also includes a tab pressure plate assembly 6, which is installed on the insulating filling body 2. The tab pressure plate assembly 6 is configured to have a clamping force on the tab 51 of the test piece 5. The tab pressure plate assembly 6 is used to connect with external detection equipment so that the detection equipment can charge and discharge the test piece 5.

[0041] For example, the pole tab pressure plate assembly 6 is installed on the insulating filling body 2 in the following manner: two parallel mounting grooves 22 are provided on the end surface of the insulating filling body 2, and two pole tab pressure plate assemblies 6 are provided, and one pole tab pressure plate assembly 6 is installed in each mounting groove 22. The pole tab pressure plate assembly 6 includes a first pole tab pressure plate 61 and a second pole tab pressure plate 62, the first pole tab pressure plate 61 is provided on the mounting groove 22, and the two are provided with a first threaded hole 611 and a second threaded hole at corresponding positions, respectively, and the second pole tab pressure plate 62 is superimposed on the first pole tab pressure plate 61 and can be moved relative to the first pole tab pressure plate 61. The second pole tab pressure plate 62 is provided with a long strip-shaped opening 621 along its length direction, and the second pole tab pressure plate 62 and the first pole tab pressure plate 61 are fixed to the insulating filling body 2 by screws passing through the opening 621, the first threaded hole 611 and the second threaded hole in sequence, as shown in FIG. Figure 6 shown.

[0042] Because the opening 621 on the second pole ear pressure plate 62 is in the shape of a long strip, the second pole ear pressure plate 62 can be moved relative to the first pole ear pressure plate 61 to adjust the distance from the pole ear 51 of the test piece 5. Therefore, when it is necessary to press and fix the pole ear 51 of the test piece 5, first move the second pole ear pressure plate 62 away from the pole ear 51, then place the pole ear 51 on the surface of the first pole ear pressure plate 61, and then move the second pole ear pressure plate 62 close to the pole ear 51 so that the pole ear 51 is set between the first pole ear pressure plate 61 and the second pole ear pressure plate 62, and screws are passed through the opening 621, the first threaded hole 611 and the second threaded hole in sequence and the screws are tightened to fix the second pole ear pressure plate 62, the first pole ear pressure plate 61 and the pole ear 51 on the mounting groove 22 of the insulating filling body 2, so that the second pole ear pressure plate 62 has a downward pressing force on the first pole ear pressure plate 61 and the pole ear 51.

[0043] In this embodiment, the surfaces of the first tab pressing plate 61 and the second tab pressing plate 62 are nickel-plated or gold-plated to facilitate better charging and discharging of the test piece 5 through the tab pressing plate. For example, when the test piece 5 is being charged and discharged, a wire is pressed and fixed between the first tab pressing plate 61 and the second tab pressing plate 62, and the wire is used to connect to an external detection device through an aviation plug, and the detection device charges and discharges the test piece 5 through the wire, the tab pressing plate assembly 6, and the tab 51.

[0044] In one embodiment, the tooling for detecting the performance of the test piece of the present application also includes a pressure relief valve 7, which is connected to the sealed cavity 1. The pressure relief valve 7 is configured to relieve the pressure inside the sealed cavity 1 when opened and maintain the pressure inside the sealed cavity 1 when closed.

[0045] Before charging and discharging, the pressure inside the sealed cavity 1 is first released by the test piece 5, and then the pressure relief valve is closed to allow the test piece 5 to be charged and discharged. The pressure inside the sealed cavity is detected by the pressure sensor 4 to detect the internal pressure of the test piece, i.e., the battery cell or battery, during charging and discharging.

[0046] For example, the pressure relief valve is a KF16 stainless steel manual flapper valve.

[0047] In one embodiment, a tool for detecting the performance of a test piece of the present application also includes an aviation plug 8, and multiple aviation plugs 8 are provided. The multiple aviation plugs 8 are all sealed and connected to the sealed cavity 1, and the temperature sensor 3, the pressure sensor 4 and the test piece 5 are all connected to external detection equipment through the aviation plug 8.

[0048] For example, in this embodiment, a tool for detecting the performance of a test piece of the present application also includes a tool shell 11, a flange assembly 12 and a base 13. The tool shell 11 is a shell structure with openings at both ends and a hollow interior. The lower end of the tool shell 11 is sealedly connected to the base 13, and the upper end of the tool shell 11 is sealedly connected to the flange assembly 12. Therefore, the sealed cavity 1 is a cavity structure sealed and enclosed by the tool shell 11, the flange assembly 12 and the base 13.

[0049] Among them, the flange assembly 12 includes an upper flange 121 and a lower flange 122, the lower flange 122 is fixed to the upper end of the tooling housing 11, the upper flange 121 is fixedly stacked on the lower flange 122 through a fixing member 123, and an O-ring 124 is provided between the two to form a sealed cavity 1, for example, an O-ring groove 125 is opened on the upper surface of the lower flange 122, and the O-ring 124 is provided in the O-ring groove 125, for example, the fixing member 123 can be a screw.

[0050] For example, in order to better connect and install the aviation plug and the pressure relief valve with the sealed cavity, the aviation plug 8 and the pressure relief valve 7 are sealed and installed on the upper flange 121. The pressure relief valve 7 is connected with the sealed cavity 1.

[0051] Taking the test piece 5 as a battery cell as an example, the working process of the tooling for testing the performance of the test piece in this application is described in detail as follows:

[0052] Manually open the pressure relief valve 7, then use a hexagonal wrench to remove the screws on the flange assembly 12 to expose the internal structure of the sealed cavity 1, put the insulating filler 2 into the sealed cavity 1, and fix the temperature sensor and the pressure sensor on the upper end surface of the insulating filler, as shown in FIG. Figure 4 The test end of the temperature sensor 3 is bonded to the test position of the battery cell to be tested, and then the battery cell to be tested is placed in the groove 21 of the insulating filler 2 to fix the battery cell to be tested. Figure 5As shown, the second tab pressing plate 62 is moved back and the tab 51 of the cell to be tested is placed on the first tab pressing plate 61, as shown in FIG. Figure 6 As shown, the second tab pressing plate 62 is then moved close to the tab so that the tab 51 is disposed between the first and second tab pressing plates. Figure 7 As shown, one end of the wire is fixed between the first / second pole ear pressure plate away from the pole ear, the locking screw fixes the two pole ear pressure plates and the pole ear on the insulating filling body 2, one end of the wire is fixed between the first / second pole ear pressure plate, and the other end of the wire is connected to the external detection equipment through the aviation plug, and the temperature sensor and the pressure sensor are also connected to the external detection equipment through the wire and the aviation plug; finally, the flange assembly 12 is locked with screws, and the pressure relief valve 7 is closed. Start the test, start charging and discharging the battery cell to be tested through the detection equipment, and detect the temperature and pressure of the battery cell to be tested during charging and discharging through the temperature sensor and the pressure sensor. After the test is completed, open the pressure relief valve 7 to release the pressure, and then open the upper flange to take out the battery cell to be tested.

[0053] It should be understood that the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of the features. In the description of the present disclosure, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0054] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present disclosure. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

[0055] Furthermore, those skilled in the art may combine and associate different embodiments or examples and features of different embodiments or examples described in this specification without mutual contradiction.

[0056] The above is only a specific embodiment of the present disclosure, but the protection scope of the present disclosure is not limited thereto. Any person skilled in the art who is familiar with the technical field can easily think of changes or substitutions within the technical scope disclosed in the present disclosure, which should be included in the protection scope of the present disclosure. Therefore, the protection scope of the present disclosure should be based on the protection scope of the claims.

Claims

1. A tool for detecting the performance of a test piece, characterized in that: include, The sealed cavity is configured as a cavity structure with a sealable interior; An insulating filling body, filled in the sealed cavity, and used to fix the device to be tested, wherein the device to be tested is a battery or a battery cell; A temperature sensor is arranged inside the sealed cavity, and is used to detect the temperature of the test piece during charging and discharging and transmit the temperature information to an external detection device; The pressure sensor is arranged inside the sealed cavity, and is used to detect the pressure of the test piece during charging and discharging and transmit the pressure information to an external detection device.

2. A tool for detecting the performance of a test piece according to claim 1, characterized in that: The insulating filling body is provided with a groove, which is matched with the piece to be tested and is used to fix the piece to be tested.

3. A tool for detecting the performance of a test piece according to claim 1, characterized in that: It also includes a tab pressure plate assembly, which is mounted on the insulating filling body, and is configured to have a pressing force on the tab of the test piece. The tab pressure plate assembly is used to connect with the detection equipment so that the detection equipment can charge and discharge the test piece.

4. A tool for detecting the performance of a test piece according to claim 3, characterized in that: The tab pressure plate assembly includes a first tab pressure plate and a second tab pressure plate, wherein the first tab pressure plate is fixed on the insulating filling body, the second tab pressure plate is stacked on the first tab pressure plate and can move relative to the first tab pressure plate, and the second tab pressure plate has a downward pressing force on the first tab pressure plate.

5. A tool for detecting the performance of a test piece according to claim 4, characterized in that: The second pole tab pressure plate is provided with an opening along its length direction, the first pole tab pressure plate is provided with a first threaded hole, and a second threaded hole is provided at a corresponding position of the insulating filling body. The second pole tab pressure plate and the first pole tab pressure plate are fixed to the insulating filling body by a fixing member passing through the opening, the first threaded hole and the second threaded hole in sequence.

6. A tool for detecting the performance of a test piece according to claim 1, characterized in that: It also includes a pressure relief valve, which is connected to the sealed cavity and is configured to relieve the pressure inside the sealed cavity when it is opened and maintain the pressure inside the sealed cavity when it is closed.

7. A tool for detecting the performance of a test piece according to claim 1, characterized in that: It also includes an aviation plug, which is provided in plurality and all of which are sealed and connected to the sealed cavity, and the temperature sensor, the pressure sensor and the test piece are all connected to the detection equipment through the aviation plug.

8. A tool for detecting the performance of a test piece according to any one of claims 1 to 7, characterized in that: It also includes a tooling shell, a flange assembly and a base, and the sealed cavity is a cavity structure formed by sealing and enclosing the tooling shell, the flange assembly and the base.

9. A tool for detecting the performance of a test piece according to claim 8, characterized in that: The flange assembly comprises an upper flange and a lower flange, wherein the lower flange is fixed to the upper end of the tooling housing, the upper flange is fixedly stacked on the lower flange through a fixing member, and an O-ring is arranged between the two to form the sealing cavity.

10. A tool for detecting the performance of a test piece according to claim 9, characterized in that: An aviation plug and a pressure relief valve are installed on the upper flange.

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