A temperature rise testing device

Abstract

This utility model relates to the field of temperature rise testing technology, and more particularly to a temperature rise testing device. The temperature rise testing device is connected to the device under test (DUT) and includes a temperature acquisition module and multiple power supply modules connected in parallel. Each power supply module includes a first switch module and a battery module connected in series. The positive terminal of the power supply module is connected to the positive terminal of the DUT, and the negative terminal of the power supply module is connected to the negative terminal of the DUT. The temperature acquisition module is located within a preset area around or inside the DUT. When performing a temperature rise test on the DUT, the DC current value input to the DUT is determined based on the number of open and / or closed switches. This utility model, employing the above solution, can reduce the cost and size of the temperature rise testing device and improve its ease of use.

Description

Technical Field

[0001] This utility model relates to the field of temperature rise testing technology, and in particular to a temperature rise testing device. Background Technology

[0002] Temperature rise testing is an important evaluation method used to detect the heat generation of equipment or materials under operating conditions and its impact on performance and safety. Related technologies employ transformers or DC power supplies capable of generating KA or higher DC current to provide the large current for temperature rise testing. However, the low-voltage, high-current generated by transformers can only produce alternating current, not direct current, making them unsuitable for DC equipment applications. DC power supplies capable of generating KA or higher DC current require large-sized electrical components and rectifier circuits, resulting in large overall equipment size and high cost. Furthermore, both transformers and DC power supplies have relatively high power requirements, necessitating stringent power distribution requirements for the testing site, and requiring circuit modifications for older factory buildings. Utility Model Content

[0003] This utility model aims to at least partially solve one of the technical problems in the related art.

[0004] Therefore, the purpose of this utility model is to propose a temperature rise testing device to reduce the cost and size of the temperature rise testing device and improve the flexibility of its use.

[0005] To achieve the above objectives, one embodiment of this utility model provides a temperature rise testing device, which is connected to the device under test and includes a temperature acquisition module and multiple power supply modules connected in parallel. Each power supply module includes a first switch module and a battery module connected in series.

[0006] The positive terminal of the power supply module is connected to the positive terminal of the device under test, and the negative terminal of the power supply module is connected to the negative terminal of the device under test. The temperature acquisition module is located in a preset area around or inside the device under test.

[0007] When performing a temperature rise test on the device under test using the temperature rise testing device, the current value of the DC power input to the device under test is determined based on the number of disconnected and / or connected switches in the switch module.

[0008] Optionally, the temperature rise testing device further includes a control module; wherein,

[0009] The first end of the control module is connected to the control end of the first switch module, and the second end of the control module is connected to the temperature acquisition module.

[0010] Optionally, the temperature acquisition module includes a thermistor; wherein,

[0011] The thermistor is disposed in a preset area around or inside the device under test. The first end of the thermistor is connected to the second end of the control module, and the second end of the thermistor is connected to the third end of the control module.

[0012] Optionally, the battery module includes at least one battery, and the energy capacity difference between different battery modules is less than a preset energy capacity difference, and the voltage difference between different battery modules is less than a preset voltage difference.

[0013] Optionally, the power supply module further includes a current-limiting resistor; wherein,

[0014] The current-limiting resistor is connected in series with the switch module and the battery module.

[0015] Optionally, the current-limiting resistor is an adjustable resistor.

[0016] Optionally, the temperature rise testing device further includes a second switching module and / or a third switching module; wherein,

[0017] The second switch module is connected in series between the positive terminal of the power supply module and the positive terminal of the device under test;

[0018] The third switch module is connected in series between the negative terminal of the power supply module and the negative terminal of the device under test.

[0019] Optionally, the second switch module and / or the third switch module include a circuit breaker, an electric operating mechanism, and a shunt trip mechanism; wherein,

[0020] The circuit breaker in the second switching module is connected in series between the positive terminal of the power supply module and the positive terminal of the device under test;

[0021] The circuit breaker in the third switch module is connected in series between the negative terminal of the power supply module and the negative terminal of the device under test.

[0022] The electric operating mechanism and the shunt tripping mechanism are connected to the control terminal of the circuit breaker.

[0023] Optionally, the temperature rise testing device further includes a voltage acquisition module; wherein,

[0024] The first terminal of the voltage acquisition module is connected to the positive terminal of the power supply module and the positive terminal of the device under test, respectively, and the second terminal of the voltage acquisition module is connected to the negative terminal of the power supply module and the negative terminal of the device under test, respectively.

[0025] Optionally, the temperature rise testing device further includes a current acquisition module; wherein,

[0026] The current acquisition module is connected in series between the positive terminal of the power supply module and the positive terminal of the device under test; or,

[0027] The current acquisition module is connected in series between the negative terminal of the power supply module and the negative terminal of the device under test.

[0028] In summary, the temperature rise testing device provided by this utility model utilizes multiple power supply modules connected in parallel to output a large current, and adjusts the DC current input to the device under test by adjusting the number of parallel power supply modules. This results in low cost and small size. Secondly, based on the characteristics of batteries, battery discharge during testing does not require an external test power supply, has no site requirements, and the battery can be charged after testing at a low rate. It also does not have high requirements for the power distribution of the site, thus improving the convenience of using the temperature rise testing device.

[0029] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0030] The above and / or additional aspects and advantages of this utility model will become apparent and readily understood from the following description of the embodiments taken in conjunction with the accompanying drawings, in which:

[0031] Figure 1 This is a schematic diagram of the structure of a temperature rise testing device provided in an embodiment of the present utility model;

[0032] Figure 2 A cross-sectional view of another temperature rise testing device provided in an embodiment of this utility model;

[0033] Figure 3 A flowchart illustrating the operation of a temperature rise testing device provided in an embodiment of this utility model. Detailed Implementation

[0034] The embodiments of this utility model are described in detail below. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain this utility model, and should not be construed as limiting this utility model.

[0035] The present invention will now be described in detail with reference to specific embodiments.

[0036] Figure 1 This is a schematic diagram of a temperature rise testing device provided in an embodiment of the present invention. Figure 1As shown, the temperature rise testing device includes: a temperature acquisition module and multiple power supply modules connected in parallel. Each power supply module includes a first switch module and a battery module connected in series.

[0037] The positive terminal of the power supply module is connected to the positive terminal of the device under test, and the negative terminal of the power supply module is connected to the negative terminal of the device under test. The temperature acquisition module is located in a preset area around or inside the device under test.

[0038] According to some embodiments, when performing a temperature rise test on the device under test using a temperature rise testing device, the current value of the DC power input to the device under test is determined based on the number of disconnected and / or connected switching modules.

[0039] In some embodiments, the temperature acquisition module is used to acquire the temperature of the device under test (DUT) when it is operating at the current current value. When the temperature acquisition module is located in a preset area around or inside the DUT, the preset area does not specifically refer to a fixed area; for example, the preset area can be determined according to the actual application scenario.

[0040] It should be noted that by utilizing multiple power supply modules connected in parallel to output a large current, and adjusting the number of power supply modules connected in parallel to regulate the DC current input to the device under test, the cost is low and the size is small. Secondly, based on the characteristics of the battery, no external test power supply is required for battery discharge during testing, and there are no requirements for the site. The battery can be charged after the test, and it can be charged at a low rate. There are no high requirements for the power distribution of the site, which can improve the convenience of using the temperature rise testing device.

[0041] Optionally, Figure 2 This is a schematic diagram of another temperature rise testing device provided in an embodiment of the present invention. Figure 2 As shown, the temperature rise testing device also includes a control module; wherein,

[0042] The first end of the control module is connected to the control end of the first switch module, and the second end of the control module is connected to the temperature acquisition module.

[0043] According to some embodiments, the control module can be used to control the on / off state of the first switch module and receive the temperature of the device under test collected by the temperature acquisition module.

[0044] Optionally, such as Figure 2 As shown, the temperature acquisition module includes a thermistor NTC; wherein,

[0045] The thermistor NTC is placed in a preset area around or inside the device under test. The first terminal of the thermistor NTC is connected to the second terminal of the control module, and the second terminal of the thermistor NTC is connected to the third terminal of the control module.

[0046] It should be noted that the control module acquires the temperature of the device under test when it is operating at the current current value through a thermistor NTC, and the temperature acquisition accuracy is relatively high.

[0047] Optionally, the battery module includes at least one battery, and the energy capacity difference between different battery modules is less than a preset energy capacity difference, and the voltage difference between different battery modules is less than a preset voltage difference.

[0048] According to some embodiments, by setting the battery type and connection method to be consistent in each battery module, the energy capacity difference between different battery modules can be less than a preset energy capacity difference, and the voltage difference between different battery modules can be less than a preset voltage difference. For example... Figure 2 As shown, each battery module is equipped with a battery BAT.

[0049] In some embodiments, the battery used in the battery module may be, for example, a lithium battery.

[0050] In some embodiments, the preset energy capacity difference and the preset voltage difference are not specifically fixed values, and can be determined according to the actual application scenario. For example, the preset energy capacity difference can be 3Ah, and the preset voltage difference can be 5mV.

[0051] Optionally, the first switch module is used to control the on / off state of the power supply module. The rated current carrying capacity of the first switch module can be greater than 1.25 times the current of the battery module at 1C, so as to improve the safety of the temperature rise test device during use.

[0052] According to some embodiments, such as Figure 2 As shown, the first switch module can be, for example, a contactor KM.

[0053] Optionally, such as Figure 2 As shown, the power supply module also includes a current-limiting resistor R; where,

[0054] The current-limiting resistor R is connected in series with the switching module and the battery module.

[0055] According to some embodiments, the current-limiting resistor R can be used to limit the output current of the battery module to protect the temperature rise test device and the device under test.

[0056] In some embodiments, the current-limiting resistor R can be an adjustable resistor to regulate the output current of the battery module. For example, the adjustment range of the current-limiting resistor R is 1 to 10 times U / I. 1C At this time, the output current of the battery module can be limited to between 0.1C and 1C.

[0057] In some embodiments, the control terminal of the current-limiting resistor R can be connected to a control module to adjust the resistance value of the current-limiting resistor R.

[0058] It should be noted that when the current-limiting resistor R is connected in series with the switching module and the battery module, the specific series connection order is not limited. For example, in one scenario... Figure 2 As shown, the positive terminal of the battery BAT in each power supply module is connected to the first end of the current limiting resistor R, the second end of the current limiting resistor R is connected to the first end of the contactor KM, the negative terminals of the batteries BAT in different power supply modules are directly connected together, and the second ends of the contactors KM in different power supply modules are directly connected together.

[0059] Optionally, the temperature rise testing device further includes a second switching module and / or a third switching module; wherein,

[0060] The second switch module is connected in series between the positive terminal of the power supply module and the positive terminal of the device under test;

[0061] The third switch module is connected in series between the negative terminal of the power supply module and the negative terminal of the device under test.

[0062] According to some embodiments, by setting a switching module between the positive terminal of the power supply module and the positive terminal of the device under test and / or between the negative terminal of the power supply module and the negative terminal of the device under test, the current output of the power supply module to the device under test can be controlled, which can improve the safety of the temperature rise testing device during use.

[0063] In some embodiments, the control terminal of the second switch module and / or the control terminal of the third switch module can be connected to the control module to control the on / off state of the second switch module and / or the on / off state of the third switch module through the control module.

[0064] In some embodiments, the rated current carrying capacity of the second switching module and / or the rated current carrying capacity of the third switching module needs to be greater than 1.25*n times the current of the power supply module IC to improve the safety of the temperature rise test device during use, where n is the number of power supply modules.

[0065] According to some embodiments, the second and / or third switching modules include a circuit breaker QF, an electrically operated mechanism, and a shunt trip mechanism; wherein...

[0066] The circuit breaker QF in the second switching module is connected in series between the positive terminal of the power supply module and the positive terminal of the device under test.

[0067] The circuit breaker QF in the third switch module is connected in series between the negative terminal of the power supply module and the negative terminal of the device under test.

[0068] The electric operating mechanism and the shunt tripping mechanism are connected to the control terminal of the circuit breaker.

[0069] In some embodiments, the electric operating mechanism is used for opening and closing the circuit breaker QF contacts, and the shunt trip mechanism is used for quickly disconnecting the circuit breaker QF contacts in case of a fault. The electric operating mechanism and the shunt trip mechanism can be connected to a control module so that the control module can control the on / off state of the circuit breaker QF through the electric operating mechanism and the shunt trip mechanism.

[0070] Optionally, the temperature rise testing device also includes a voltage acquisition module; wherein,

[0071] The first terminal of the voltage acquisition module is connected to the positive terminal of the power supply module and the positive terminal of the device under test, respectively, and the second terminal of the voltage acquisition module is connected to the negative terminal of the power supply module and the negative terminal of the device under test, respectively.

[0072] According to some embodiments, the third terminal of the voltage acquisition module can also be connected to the control module to acquire the voltage of the device under test in real time and transmit it to the control module for display.

[0073] In some embodiments, the rated range of the voltage acquisition module may be, for example, 1500VDC.

[0074] In some embodiments, the voltage acquisition module may, for example, employ a voltage sensor VT, such as... Figure 2 As shown.

[0075] Optionally, the temperature rise testing device also includes a current acquisition module; wherein,

[0076] The current acquisition module is connected in series between the positive terminal of the power supply module and the positive terminal of the device under test; or,

[0077] The current acquisition module is connected in series between the negative terminal of the power supply module and the negative terminal of the device under test.

[0078] According to some embodiments, the current acquisition module can also be connected to the control module to acquire the current of the device under test in real time and transmit it to the control module for display.

[0079] In some embodiments, the rated range of the current acquisition module can be, for example, 1.5*n times the current of the power supply module IC.

[0080] In some embodiments, the current acquisition module may be, for example, a current sensor CT, such as... Figure 2 As shown.

[0081] Optionally, Figure 3 This is a flowchart illustrating the operation of a temperature rise testing device provided in an embodiment of the present invention. Figure 3 As shown, the test plan adopts Figure 2The temperature rise testing device shown performs an overcurrent temperature rise test on the device under test for Xh (assuming 2h) using a constant current I (assumed to be 1kA), including the following steps:

[0082] S1, Initial state check.

[0083] The control module checks the status of n batteries to confirm the voltage differences between them.

[0084] S2. Execute different action processes based on the voltage difference ΔU between different batteries.

[0085] If ΔU > 100mV, the alarm battery needs to be manually balanced.

[0086] If 20 < ΔU ≤ 100mV, then the contactor KM of each power supply module is closed to perform self-balancing between batteries until ΔU ≤ 20mV. If the balancing time is too long and exceeds 5 minutes, an alarm will be triggered indicating that the battery self-balancing has failed.

[0087] If ΔU≤20mV, then the contactor KM of each power supply module is closed directly to proceed to the next step;

[0088] S3. Measure the resistance value of the device under test.

[0089] In this system, only the contactor KM in one power supply module is controlled to close. For example, all contactors KM2 to KMn except for contactor KM1 in the first power supply module can be disconnected, and then the circuit breaker QF can be closed and closed after 1 minute. The control module measures the data collected from the current sensor CT and voltage sensor VT during this time to obtain the resistance value R of the device under test. b =U1 / I1-R1, where U1 is the voltage value output by the current sensor CT, I1 is the current value output by the voltage sensor VT, and R1 is the resistance value of the current limiting resistor R.

[0090] S4. Adjust the test current.

[0091] Among them, the required test current I = U can be used as a reference. bat / (R1 / n+R b The number of power supply modules that need to be connected in parallel is calculated as m = I*R1 / (U bat -I*R b ), where U bat This is the voltage value of battery BAT.

[0092] S5, Start high current test.

[0093] In this process, the contactors KM of m power supply modules are closed, for example, KM1 to KMm can be closed, and then the circuit breaker QF is closed. The m batteries BAT are connected in parallel to output a large DC current to the device under test. The current, voltage and temperature of the device under test are recorded in real time through the thermistor NTC, current sensor CT and voltage sensor VT.

[0094] The collection, storage, use, processing, transmission, provision, and disclosure of user personal information involved in this utility model all comply with the provisions of relevant laws and regulations and do not violate public order and good morals.

[0095] It should be noted that personal information collected from users should be used for legitimate and reasonable purposes and should not be shared or sold outside of these legitimate uses. Furthermore, such collection / sharing should only be conducted after receiving the user's informed consent, including but not limited to notifying the user to read the user agreement / user notice and sign an agreement / authorization that includes authorization of relevant user information before the user uses the function. In addition, any necessary steps must be taken to protect and safeguard access to such personal information data and ensure that others with access to personal information data comply with their privacy policies and procedures.

[0096] This invention is intended to provide an implementation scheme for users to selectively prevent the use or access to their personal information data. Specifically, this invention is intended to provide hardware and / or software to prevent or block access to such personal information data. Once personal information data is no longer needed, risks can be minimized by restricting data collection and deleting data. Furthermore, where applicable, such personal information can be de-identified to protect user privacy.

[0097] The acquisition, transmission, storage, use, and processing of data in this utility model's technical solution all comply with the relevant provisions of national laws and regulations.

[0098] It should be noted that in the embodiments of this utility model, certain software, components, models and other existing solutions in the industry may be mentioned. These should be regarded as exemplary and are only intended to illustrate the feasibility of implementing the technical solution of this application. However, it does not mean that the applicant has used or necessarily used the solution.

[0099] In the foregoing descriptions of the embodiments, the terms "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0100] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this utility model, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0101] Any process or method described in the flowchart or otherwise herein can be understood as representing a module, segment, or portion of code comprising one or more executable instructions for implementing custom logic functions or processes, and the scope of the preferred embodiments of the present invention includes additional implementations in which functions may be performed not in the order shown or discussed, including substantially simultaneously or in reverse order according to the functions involved, as should be understood by those skilled in the art to which embodiments of the present invention pertain.

[0102] The logic and / or steps represented in the flowchart or otherwise described herein, for example, can be considered as a sequenced list of executable instructions for implementing logical functions, and can be embodied in any computer-readable medium for use by, or in conjunction with, an instruction execution system, apparatus, or device (such as a computer-based system, a processor-included system, or other system that can fetch and execute instructions from, an instruction execution system, apparatus, or device). For the purposes of this specification, "computer-readable medium" can be any means that can contain, store, communicate, propagate, or transmit programs for use by, or in conjunction with, an instruction execution system, apparatus, or device. More specific examples (a non-exhaustive list) of computer-readable media include: an electrical connection having one or more wires (electronic device), a portable computer disk drive (magnetic device), random access memory (RAM), read-only memory (ROM), erasable and editable read-only memory (EPROM or flash memory), fiber optic devices, and portable optical disc read-only memory (CDROM). Furthermore, computer-readable media can even be paper or other suitable media on which programs can be printed, because programs can be obtained electronically, for example, by optically scanning the paper or other media, followed by editing, interpreting, or otherwise processing as necessary, and then stored in computer memory.

[0103] It should be understood that the various parts of this utility model can be implemented using hardware, software, firmware, or a combination thereof. In the above embodiments, multiple steps or methods can be implemented using software or firmware stored in memory and executed by a suitable instruction execution system. For example, if implemented in hardware as in another embodiment, it can be implemented using any one or a combination of the following techniques known in the art: discrete logic circuits having logic gates for implementing logical functions on data signals, application-specific integrated circuits (ASICs) having suitable combinational logic gates, programmable gate arrays (PGAs), field-programmable gate arrays (FPGAs), etc.

[0104] Those skilled in the art will understand that all or part of the steps of the methods described in the above embodiments can be implemented by a program instructing related hardware, and the program can be stored in a computer-readable storage medium. When executed, the program includes one or a combination of the steps of the method embodiments.

[0105] Furthermore, the functional units in the various embodiments of this utility model can be integrated into a processing module, or each unit can exist physically separately, or two or more units can be integrated into a module. The integrated module can be implemented in hardware or as a software functional module. If the integrated module is implemented as a software functional module and sold or used as an independent product, it can also be stored in a computer-readable storage medium.

[0106] The storage medium mentioned above can be a read-only memory, a disk, or an optical disk, etc. Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions, and variations to the above embodiments within the scope of the present invention.

Claims

1. A temperature rise testing device, characterized in that, The temperature rise testing device is connected to the device under test and includes a temperature acquisition module and multiple power supply modules connected in parallel. Each power supply module includes a first switch module and a battery module connected in series. The positive terminal of the power supply module is connected to the positive terminal of the device under test, and the negative terminal of the power supply module is connected to the negative terminal of the device under test. The temperature acquisition module is located in a preset area around or inside the device under test. When performing a temperature rise test on the device under test using the temperature rise testing device, the current value of the DC power input to the device under test is determined based on the number of disconnected and / or connected switches in the switch module.

2. The apparatus according to claim 1, characterized in that, The temperature rise testing device also includes a control module; wherein... The first end of the control module is connected to the control end of the first switch module, and the second end of the control module is connected to the temperature acquisition module.

3. The apparatus according to claim 2, characterized in that, The temperature acquisition module includes a thermistor; wherein... The thermistor is disposed in a preset area around or inside the device under test. The first end of the thermistor is connected to the second end of the control module, and the second end of the thermistor is connected to the third end of the control module.

4. The apparatus according to claim 1, characterized in that, The battery module includes at least one battery, and the energy capacity difference between different battery modules is less than a preset energy capacity difference, and the voltage difference between different battery modules is less than a preset voltage difference.

5. The apparatus according to claim 1, characterized in that, The power supply module also includes a current-limiting resistor; wherein... The current-limiting resistor is connected in series with the switch module and the battery module.

6. The apparatus according to claim 5, characterized in that, The current-limiting resistor is an adjustable resistor.

7. The apparatus according to claim 1, characterized in that, The temperature rise testing device further includes a second switch module and / or a third switch module; wherein... The second switch module is connected in series between the positive terminal of the power supply module and the positive terminal of the device under test; The third switch module is connected in series between the negative terminal of the power supply module and the negative terminal of the device under test.

8. The apparatus according to claim 7, characterized in that, The second switch module and / or the third switch module include a circuit breaker, an electric operating mechanism, and a shunt trip mechanism; wherein, The circuit breaker in the second switching module is connected in series between the positive terminal of the power supply module and the positive terminal of the device under test; The circuit breaker in the third switch module is connected in series between the negative terminal of the power supply module and the negative terminal of the device under test. The electric operating mechanism and the shunt tripping mechanism are connected to the control terminal of the circuit breaker.

9. The apparatus according to claim 1, characterized in that, The temperature rise testing device also includes a voltage acquisition module; wherein... The first terminal of the voltage acquisition module is connected to the positive terminal of the power supply module and the positive terminal of the device under test, respectively, and the second terminal of the voltage acquisition module is connected to the negative terminal of the power supply module and the negative terminal of the device under test, respectively.

10. The apparatus according to claim 1, characterized in that, The temperature rise testing device also includes a current acquisition module; wherein... The current acquisition module is connected in series between the positive terminal of the power supply module and the positive terminal of the device under test; or, The current acquisition module is connected in series between the negative terminal of the power supply module and the negative terminal of the device under test.

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