Voltage acquisition board for aging cabinet and aging cabinet

Abstract

The utility model discloses a voltage collection board and aging cabinet for aging cabinet, wherein the voltage collection board for aging cabinet includes: control module, reference voltage module and voltage dividing resistance module, the input of voltage dividing resistance module is connected the voltage detection end of the product to be measured in aging cabinet, and the output of voltage dividing resistance module is connected the ADC sampling end of control module, voltage dividing resistance module is used for converting the voltage value of voltage detection end and outputing to the ADC sampling end, reference voltage module is connected control module, is used for outputing the set reference voltage value to control module, control module is used for sampling the voltage value of voltage dividing resistance module output end, the utility model discloses through reference voltage module provides the stable reference voltage for control module to avoid the unstable ADC sampling accuracy, and through voltage dividing resistance module, the voltage of voltage detection end of the product to be measured is converted to the voltage value close to ADC sampling range, to improve ADC sampling accuracy.

Description

Technical Field

[0001] This utility model relates to the field of aging cabinet technology, and in particular to a voltage acquisition board for an aging cabinet and an aging cabinet. Background Technology

[0002] An aging chamber is a device used to simulate the long-term operation of a product under actual use conditions to test its performance and reliability. By applying certain voltage, current, temperature and other conditions to the product, it is made to work continuously in the aging chamber for a period of time, which accelerates the exposure of potential problems of the product. The performance, reliability and lifespan of the product can be judged by the changes in voltage values ​​of relevant parts.

[0003] Currently, the voltage acquisition board for aging chambers faces the problem of low accuracy in acquiring voltage data. Low accuracy directly affects the accuracy of aging test results, which is particularly problematic for products with high precision requirements. When the voltage is low, there will be a voltage drop compared to the actual voltage, with a significant difference between the two. This makes it impossible to accurately detect the entire aging process of the product, hindering accurate performance evaluation. Utility Model Content

[0004] The main purpose of this invention is to provide a voltage acquisition board for an aging cabinet, which aims to improve the voltage accuracy of the aging cabinet in detecting the product under test.

[0005] To achieve the above objectives, the present invention proposes a voltage acquisition board for an aging cabinet, the voltage acquisition board for the aging cabinet comprising: a control module, a reference voltage module, and a voltage divider resistor module;

[0006] The input terminal of the voltage divider resistor module is connected to the voltage detection terminal of the product under test in the aging chamber, and the output terminal of the voltage divider resistor module is connected to the ADC sampling terminal of the control module; the voltage divider resistor module is used to convert the voltage value of the voltage detection terminal and output it to the ADC sampling terminal.

[0007] The reference voltage module is connected to the control module and is used to output a set reference voltage value to the control module;

[0008] The control module is used to sample the voltage value at the output terminal of the voltage divider resistor module.

[0009] Optionally, the voltage acquisition board for the aging cabinet further includes: a communication module;

[0010] The communication module is connected to the control module; the control module is also used to output the voltage value of the voltage detection terminal of the product under test to the communication module after acquiring the voltage value.

[0011] The communication module is also connected to the main control module of the aging cabinet, and is used to isolate and output the voltage value output by the control module to the main control module after receiving it.

[0012] Optionally, the voltage acquisition board for the aging cabinet further includes: a power supply module;

[0013] The power module is connected to an external voltage at its input terminal and to the control module at its output terminal; the power module is used to convert the first voltage into a preset voltage and then output it to the control module.

[0014] Optionally, the reference voltage module includes a chip with model number ZA431AN-ATRE1.

[0015] Optionally, the voltage divider resistor module includes:

[0016] First resistor, second resistor;

[0017] The two ends of the first resistor are respectively connected to the voltage detection terminal and the first end of the second resistor, and the second end of the second resistor is grounded; wherein, the first end of the second resistor is connected to the ADC sampling terminal of the control module;

[0018] The voltage divider resistor module further includes: at least one resistor;

[0019] The at least one resistor is connected in parallel with the second resistor.

[0020] Optionally, the power module includes: a linear voltage regulator chip, a first diode, a second diode, a third resistor, a first capacitor, a second capacitor, and a third capacitor;

[0021] The cathodes of the first diode and the second diode, the first terminal of the second capacitor, and the input terminal of the linear regulator chip are connected; the anode of the first diode is used to connect to a first voltage, and the anode of the second diode is connected to a second voltage; the third resistor and the first capacitor are connected in parallel and are disposed between the anode of the second diode and ground; the second terminal of the second capacitor is grounded; the third capacitor is disposed between the output terminal of the linear regulator chip and ground.

[0022] Optionally, the communication module includes a chip with the model number CS817X22HS.

[0023] Optionally, the voltage acquisition board for the aging cabinet further includes: a programming interface;

[0024] The programming interface is connected to the control module.

[0025] This utility model also proposes an aging cabinet, which includes the voltage acquisition board for the aging cabinet.

[0026] This invention discloses a voltage acquisition board for an aging chamber and an aging chamber. The voltage acquisition board for the aging chamber includes a control module, a reference voltage module, and a voltage divider resistor module. The input terminal of the voltage divider resistor module is connected to the voltage detection terminal of the product under test in the aging chamber, and the output terminal of the voltage divider resistor module is connected to the ADC sampling terminal of the control module. The voltage divider resistor module is used to convert the voltage value of the voltage detection terminal and output it to the ADC sampling terminal. The reference voltage module is connected to the control module and is used to output a set reference voltage value to the control module. The control module is used to sample the voltage value at the output terminal of the voltage divider resistor module. This invention provides a stable reference voltage to the control module through the reference voltage module to avoid unstable ADC sampling accuracy, and converts the voltage of the voltage detection terminal of the product under test to a voltage value close to the ADC sampling range through the voltage divider resistor module, thereby improving the ADC sampling accuracy. Attached Figure Description

[0027] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0028] Figure 1 This is a schematic diagram of the structure of an embodiment of the voltage acquisition board for an aging cabinet according to the present invention;

[0029] Figure 2 This is a schematic diagram of another embodiment of the voltage acquisition board of the present invention for an aging cabinet;

[0030] Figure 3 This is a schematic diagram of another embodiment of the voltage acquisition board for an aging cabinet according to the present invention.

[0031] Figure 4 This is a schematic diagram of another embodiment of the voltage acquisition board for an aging cabinet according to the present invention.

[0032] Figure 5 This is a schematic diagram of another embodiment of the voltage acquisition board for an aging cabinet according to the present invention;

[0033] Figure 6 This is a schematic diagram of another embodiment of the voltage acquisition board of this utility model used in an aging cabinet.

[0034] Explanation of icon numbers:

[0035]

[0036]

[0037] The realization of the purpose, functional features and advantages of this utility model will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0038] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0039] It should be noted that all directional indicators (such as up, down, left, right, front, back, etc.) in this utility model embodiment are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicator will also change accordingly.

[0040] In this utility model, unless otherwise explicitly specified and limited, the terms "connection," "fixing," etc., should be interpreted broadly. For example, "fixing" can mean a fixed connection, a detachable connection, or an integral part; it can mean a mechanical connection or an electrical connection; it can mean a direct connection or an indirect connection through an intermediate medium; it can mean the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0041] Furthermore, in this utility model, descriptions involving "first," "second," etc., are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of that feature. Additionally, the technical solutions of the various embodiments can be combined with each other, but only on the basis of being achievable by those skilled in the art. When the combination of technical solutions is contradictory or impossible to implement, such a combination of technical solutions should be considered non-existent and not within the scope of protection claimed by this utility model.

[0042] It should be noted that aging chambers can determine the stability of the tested object and detect potential faults by detecting the voltage at relevant locations of the tested object.

[0043] During the aging process, the performance of the tested object (such as electronic components, batteries, etc.) may change. By continuously collecting voltage data, it is possible to observe whether the voltage is stable. For example, for electronic chips, a stable voltage output is an important indicator of their normal operation. If the voltage fluctuates significantly during the aging process, it may indicate a problem with the internal circuit structure of the chip, such as performance degradation of certain transistors or loose solder joints in the circuit.

[0044] Taking power module 50 as an example, when a newly manufactured power module 50 undergoes aging testing in an aging chamber, its rated output voltage should be within a stable range. If the collected voltage exceeds the specified upper and lower limits (for example, for a power module 50 with a rated output of 5V, the voltage fluctuation range during normal aging exceeds 4.8-5.2V), this indicates that the performance of the power module 50 is unstable and may not meet the requirements of actual use.

[0045] Furthermore, abnormal voltage is often an early sign of potential faults. Many internal faults in electronic devices are first reflected in voltage changes. For example, aging capacitors can cause increased leakage current, leading to a drop in voltage in connected circuits. By monitoring voltage, these signs of potential faults can be detected in a timely manner.

[0046] For battery aging tests, when problems such as short circuits or deterioration of electrode material performance occur inside the battery, its output voltage will significantly decrease or exhibit abnormal fluctuations. If the aging chamber does not have the function of collecting voltage data, these potential faults may not be detected in time. If a faulty battery is put into use, it may pose a safety hazard to the equipment, such as sudden power outages or overheating in electronic devices.

[0047] In assessing product aging, high-precision detection can more accurately track voltage changes over time. Taking battery aging as an example, as a battery ages, its voltage gradually decreases. If the voltage detection board is highly accurate, it can more precisely measure each tiny voltage drop, thus more accurately determining the battery's aging stage. For instance, in the aging process of lithium batteries, high-precision voltage detection can distinguish voltage changes of 0.01V or even smaller, helping to more accurately assess the battery's remaining capacity and health status.

[0048] Reference Figure 1 This utility model proposes a voltage acquisition board 1 for an aging cabinet, the voltage acquisition board 1 for the aging cabinet includes: a control module 10, a reference voltage module 20 and a voltage divider resistor module 30.

[0049] The input terminal of the voltage divider resistor module 30 is connected to the voltage detection terminal of the product under test in the aging chamber, and the output terminal of the voltage divider resistor module 30 is connected to the ADC sampling terminal of the control module 10; the voltage divider resistor module 30 is used to convert the voltage value of the voltage detection terminal and output it to the ADC sampling terminal.

[0050] The reference voltage module 20 is connected to the control module 10 and is used to output a set reference voltage value to the control module 10.

[0051] The control module 10 is used to sample the voltage value at the output terminal of the voltage divider resistor module 30.

[0052] It should be noted that one end of the voltage divider resistor module 30 is connected to the voltage detection terminal of the product under test (DUT), and the other end is connected to the ADC sampling terminal of the control module 10. It is easy to understand that the voltage provided by the voltage detection terminal of the DUT is an analog quantity. The control module 10 includes a controller. In the prior art, digital controllers are widely used. When the control module 10 uses a digital controller to process the voltage value from the voltage detection terminal, it needs to perform ADC sampling on the analog voltage to convert it into a digital quantity. If the control module 10 uses an analog controller to process the voltage value from the voltage detection terminal, it can process it directly. Furthermore, considering that the voltage value output from the voltage detection terminal of the DUT may exceed the input range of the ADC sampling terminal, resulting in erroneous sampling results, this solution uses the voltage divider resistor module 30 to convert the voltage value from the voltage detection terminal and output it to the ADC sampling terminal, thus preventing the ADC sampling terminal from receiving voltages exceeding its input range.

[0053] Furthermore, it should be noted that the sampling range with the highest ADC sampling accuracy is usually close to the full-scale range. Since the sampling accuracy of an ADC is related to resolution, it can make fuller use of its resolution when approaching the full-scale range, thus achieving higher accuracy. Based on this, the first embodiment of this utility model is proposed. Compared to a voltage divider circuit with a fixed voltage gain value, in this embodiment, the voltage divider resistor module 30 allows for graded adjustment of the voltage gain, thereby adapting to the voltage values ​​at the voltage detection terminals of different products under test, converting them into voltage values ​​close to the sampling range of the ADC of the control module 10, and thus obtaining higher voltage detection accuracy. (Refer to...) Figure 2 The voltage divider resistor module 30 includes: a first resistor R1 and a second resistor R2; the two ends of the first resistor R1 are respectively connected to the voltage detection terminal and the first end of the second resistor R2, and the second end of the second resistor R2 is grounded; wherein, the first end of the second resistor R2 is connected to the ADC sampling terminal of the control module 10.

[0054] The first resistor R1 and the second resistor R2 form a voltage divider. It's easy to understand that the ratio of the first resistor R1 to the second resistor R2 determines the voltage gain of the voltage divider module 30. Furthermore, it should be noted that the first resistor R1 can be the equivalent resistance of multiple series-parallel resistors, and the second resistor R2 can also be the equivalent resistance of multiple series-parallel resistors. In one example, the first resistor R1 and / or the second resistor R2 are variable resistors. By adjusting the values ​​of the first resistor R1 and / or the second resistor R2, the voltage gain of the voltage divider module 30 can be adjusted, thereby changing the voltage value output to the ADC sampling terminal to obtain a more accurate sampling voltage value.

[0055] In another example of this utility model, the voltage divider resistor module 30 further includes: at least one resistor; the at least one resistor is connected in parallel with the second resistor R2. Multiple resistors are connected in parallel with at least the second resistor R2. Additionally, refer to... Figure 3 Multiple resistors have a switch connected to one end. The switch can be closed or opened by the operator, thereby changing the voltage output from the voltage divider resistor module 30 to the ADC sampling terminal. Specifically, during the aging test, the operator can set the corresponding switch combination to make the voltage output from the voltage divider resistor module 30 close to the sampling range of the ADC.

[0056] Furthermore, it should be noted that the resolution of an ADC refers to the smallest analog voltage change it can resolve. It is closely related to the reference voltage; the digital code output by the ADC represents the ratio of the input analog voltage to the reference voltage. For example, for an n-bit ADC, it can represent 2^n discrete levels. n indivual.

[0057] The voltage V corresponding to the least significant bit (LSB) LSB Formulas can be used To calculate, where V REF This is the reference voltage. If the reference voltage is inaccurate or unstable, it will directly change V. LSB The value of .

[0058] For example, there is a 10-bit ADC with a normal reference voltage V. REF =5V, then If the reference voltage drops to 4.5V, at this time This means that the minimum voltage change that the ADC can distinguish has changed, thus affecting the resolution and ultimately the sampling accuracy.

[0059] The reference voltage module 20 is connected to the control module 10 and is used to output a set reference voltage value to the control module 10. The reference voltage module 20 is also used to output a reference voltage of corresponding amplitude to the control module 10 after receiving a voltage adjustment command from the user.

[0060] In this invention, the reference voltage module 20 is connected to the control module 10 and is used to output a set reference voltage value to the control module 10. It is easy to understand that this solution uses an independent reference voltage module 20 to provide a stable reference voltage value to the control module 10, avoiding changes in ADC sampling accuracy due to reference voltage fluctuations.

[0061] In another example, the reference voltage module 20 is also configured to output a reference voltage of a corresponding amplitude to the control module 10 after receiving a voltage adjustment command from the user. In this example, the operator is allowed to adjust the reference voltage output from the reference voltage module 20 to the control module 10 according to the output voltage range of the product under test. The sampling accuracy of the ADC sampling in the control module 10 can be changed by altering the reference voltage value output to the control module 10.

[0062] like Figure 4 As shown, in one example, the reference voltage module 20 includes a chip of model ZA431AN-ATRE1.

[0063] The control module 10 is used to sample the voltage value at the output terminal of the voltage divider resistor module 30. It is easy to understand that, since this solution includes the voltage divider resistor module 30, the ADC sampling terminal of the control module 10 is connected to the output terminal of the voltage divider resistor module 30 to detect the voltage value output by the voltage divider resistor module 30. The output voltage value of the voltage divider resistor module 30 has a proportional relationship with the voltage value at the voltage detection terminal of the product under test. Therefore, after obtaining the voltage value at the output terminal of the voltage divider resistor module 30, the control module 10 combines it with the voltage gain coefficient of the voltage divider resistor module 30 to obtain the true voltage value at the voltage detection terminal of the product under test.

[0064] The voltage gain coefficient can be determined by the ratio of the first resistor R1 and the second resistor R2 in the voltage divider resistor module 30. The control module 10 may include a controller such as an MCU, SOC, or FPGA.

[0065] This invention discloses a voltage acquisition board 1 for an aging chamber. The voltage acquisition board 1 includes a control module 10, a reference voltage module 20, and a voltage divider resistor module 30. The input terminal of the voltage divider resistor module 30 is connected to the voltage detection terminal of the product under test in the aging chamber, and the output terminal of the voltage divider resistor module 30 is connected to the ADC sampling terminal of the control module 10. The voltage divider resistor module 30 is used to convert the voltage value of the voltage detection terminal and output it to the ADC sampling terminal. The reference voltage module 20 is connected to the control module 10 and is used to output a set reference voltage value to the control module 10. The control module 10 is used to sample the voltage value at the output terminal of the voltage divider resistor module 30. This invention provides a stable reference voltage to the control module 10 through the reference voltage module 20 to avoid unstable ADC sampling accuracy, and converts the voltage of the voltage detection terminal of the product under test to a voltage value close to the ADC sampling range through the voltage divider resistor module 30, thereby improving the ADC sampling accuracy.

[0066] The voltage acquisition board 1 for the aging cabinet also includes: a communication module 40;

[0067] The communication module 40 is connected to the control module 10; the control module 10 is also used to output the voltage value of the voltage detection terminal of the product under test to the communication module 40 after acquiring the voltage value.

[0068] The communication module 40 is also connected to the main control module of the aging cabinet, and is used to isolate and output the voltage value output by the control module 10 to the main control module after receiving it.

[0069] As is readily understood, the voltage acquisition board is used in the aging chamber. After acquiring the voltage of the product under test, the board outputs it to the main control board of the aging chamber for processing. During voltage data transmission, this solution uses a communication module 40 to achieve data transmission and reception isolation, ensuring the stability of communication between the voltage acquisition board and the main control board. The communication module 40 includes a CS817X22HS chip. This chip is a dual-channel digital isolation chip, and its output is connected to the serial communication port of the control module 10 to achieve data transmission.

[0070] The voltage acquisition board 1 for the aging cabinet also includes: a power module 50;

[0071] The power module 50 is connected to an external voltage at its input terminal and to the control module 10 at its output terminal. The power module 50 is used to convert the first voltage into a preset voltage and then output it to the control module 10.

[0072] It should be noted that the power module 50 provides power supply voltage to the control module 10. In one example, such as... Figure 5As shown, the power module 50 includes: a linear voltage regulator chip 510, a first diode D1, a second diode D2, a third resistor R3, a first capacitor C1, a second capacitor C2, and a third capacitor C3;

[0073] The cathodes of the first diode D1 and the second diode D2, the first terminal of the second capacitor C2, and the input terminal of the linear regulator chip 510 are connected; the anode of the first diode D1 is used to connect to a first voltage, and the anode of the second diode D2 is connected to a second voltage; the third resistor R3 and the first capacitor C1 are connected in parallel and are disposed between the anode of the second diode D2 and ground; the second terminal of the second capacitor C2 is grounded; the third capacitor C3 is disposed between the output terminal of the linear regulator chip 510 and ground.

[0074] The linear voltage regulator chip 510 can be an SSP7985P33PI chip. The power module 50 allows the use of a first voltage and a second voltage as external power supplies for power redundancy, wherein the voltage with the highest value is selected to power the control module 10. The first diode D1 and the second diode D2 can prevent current backflow, and the first to third capacitors C3 are voltage stabilizing capacitors.

[0075] like Figure 6 As shown, the voltage acquisition board 1 for the aging cabinet also includes: a programming interface 60;

[0076] The programming interface 60 is connected to the control module 10.

[0077] It is easy to understand that the programming interface 60 is specifically connected to the serial communication terminal of the control module 10, and is used to receive the software program transmitted to the control module 10 by the operator using a computer or programmer, and output it to the control module 10.

[0078] This utility model also proposes an aging cabinet, which includes the voltage acquisition board 1 used for the aging cabinet.

[0079] The specific structure of the voltage acquisition board 1 used in the aging cabinet is as described in the above embodiments. Since this aging cabinet adopts all the technical solutions of all the above embodiments, it has at least all the beneficial effects brought about by the technical solutions of the above embodiments, and will not be repeated here. The above description is only an optional embodiment of this utility model, and does not limit the patent scope of this utility model. All equivalent structural transformations made under the concept of this utility model using the contents of this utility model specification and drawings, or direct / indirect applications in other related technical fields, are included within the patent protection scope of this utility model.

Claims

1. A voltage acquisition board for an aging cabinet, characterized in that, The voltage acquisition board for the aging cabinet includes: a control module, a reference voltage module, and a voltage divider resistor module; The input terminal of the voltage divider resistor module is connected to the voltage detection terminal of the product under test in the aging chamber, and the output terminal of the voltage divider resistor module is connected to the ADC sampling terminal of the control module; the voltage divider resistor module is used to convert the voltage value of the voltage detection terminal and output it to the ADC sampling terminal. The reference voltage module is connected to the control module and is used to output a set reference voltage value to the control module; The control module is used to sample the voltage value at the output terminal of the voltage divider resistor module.

2. The voltage acquisition board for an aging cabinet as described in claim 1, characterized in that, The voltage acquisition board for the aging cabinet also includes: a communication module; The communication module is connected to the control module; the control module is also used to output the voltage value of the voltage detection terminal of the product under test to the communication module after acquiring the voltage value. The communication module is also connected to the main control module of the aging cabinet, and is used to isolate and output the voltage value output by the control module to the main control module after receiving it.

3. The voltage acquisition board for an aging cabinet as described in claim 2, characterized in that, The voltage acquisition board for the aging cabinet also includes: a power module; The power module is connected to an external voltage at its input terminal and to the control module at its output terminal; the power module is used to convert the first voltage into a preset voltage and then output it to the control module.

4. The voltage acquisition board for an aging cabinet as described in claim 3, characterized in that, The reference voltage module includes a chip with model number ZA431AN-ATRE1.

5. The voltage acquisition board for an aging cabinet as described in claim 3, characterized in that, The voltage divider resistor module includes: First resistor, second resistor; The two ends of the first resistor are respectively connected to the voltage detection terminal and the first end of the second resistor, and the second end of the second resistor is grounded; wherein, the first end of the second resistor is connected to the ADC sampling terminal of the control module; The voltage divider resistor module further includes: at least one resistor; The at least one resistor is connected in parallel with the second resistor.

6. The voltage acquisition board for an aging cabinet as described in claim 3, characterized in that, The power module includes: a linear regulator chip, a first diode, a second diode, a third resistor, a first capacitor, a second capacitor, and a third capacitor; The cathodes of the first diode and the second diode, the first terminal of the second capacitor, and the input terminal of the linear regulator chip are connected; the anode of the first diode is used to connect to a first voltage, and the anode of the second diode is connected to a second voltage; the third resistor and the first capacitor are connected in parallel and are disposed between the anode of the second diode and ground; the second terminal of the second capacitor is grounded; the third capacitor is disposed between the output terminal of the linear regulator chip and ground.

7. The voltage acquisition board for an aging cabinet as described in claim 3, characterized in that, The communication module includes a chip with the model number CS817X22HS.

8. The voltage acquisition board for an aging cabinet as described in claim 3, characterized in that, The voltage acquisition board for the aging cabinet also includes: a programming interface; The programming interface is connected to the control module.

9. An aging cabinet, characterized in that, The aging cabinet includes a voltage acquisition board for the aging cabinet as described in any one of claims 1 to 8.

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