A multi-channel low-pass filtering device for battery products

Abstract

The utility model discloses a kind of battery product multichannel low pass filter devices, including signal distribution box, low pass filter module, insulated integrated box, fan and stabilized power supply, signal distribution box and stabilized power supply are located at the outside of insulated integrated box, low pass filter module is located in insulated integrated box inside;Parallel two side walls of insulated integrated box are equipped with air vent;Fan is located in the air vent of one, and another air vent is equipped with detachable air filter screen;Signal distribution box has 2-2 or more channels, its inside is equipped with the metal shielding baffle of separating each channel, and the metal shielding baffle is equipped with grounding component;Low pass filter module is formed by the low pass filter of two or more low pass filter parallel connection, and input port and output port of distribution box are connected by signal line respectively;Insulated integrated box inside is equipped with the flow guide plate extending along air vent direction.The utility model not only greatly improves test efficiency, also improves test precision simultaneously.

Description

Technical Field

[0001] This utility model relates to the technical field of low-pass filter devices for battery products. Background Technology

[0002] As is well known, there are many types of battery products, and performance testing requires testing each one individually, which is time-consuming. Furthermore, the number of test items for battery samples is constantly increasing, and the requirements for each data point are also constantly rising, further extending the testing cycle. In addition, according to testing standards, a low-pass filter needs to be added at the front end of the tested battery, requiring a frequency of 5kHz±500Hz. This generates a significant amount of heat during long-term testing, leading to inaccurate test results.

[0003] Using multi-channel testing can easily lead to signal crosstalk, affecting data accuracy. Furthermore, uneven heat distribution can cause localized overheating; signal line transmission losses are also significant. Therefore, existing testing equipment employs independent test designs.

[0004] Therefore, it is necessary to study a battery low-pass filter device that can both ensure testing accuracy and improve testing efficiency.

[0005] Patent CN113162221A discloses a power signal splitter that uses a combination of low-pass and high-pass filters for the acquisition and separation of acoustic emission signals. However, its filtering parameters are not compatible with battery testing requirements, and it cannot provide directional heat dissipation. Patent CN213662266U discloses a signal filter with good heat dissipation, which uses a fan for single-channel heat dissipation, but it does not solve the problems of multi-channel integration and signal anti-interference. Utility Model Content

[0006] The purpose of this invention is to address the aforementioned deficiencies in the prior art by providing a multi-channel low-pass filter device for battery products, which significantly shortens the testing cycle and reduces testing costs while ensuring accurate and stable test data.

[0007] To achieve the above objectives, the technical solution adopted by this utility model is as follows: A multi-channel low-pass filter device for battery products includes a signal junction box, a low-pass filter module, an insulating integrated box, a fan, and a regulated power supply. The signal junction box and the regulated power supply are located outside the insulating integrated box, while the low-pass filter module is located inside the insulating integrated box. Ventilation openings are provided on the parallel side walls of the insulating integrated box. The fan is located in one of the ventilation openings, and a removable air filter is provided at the other ventilation opening. The regulated power supply powers the low-pass filter module and the fan. The signal junction box has 2-2 or more channels, and its interior is divided into sections separating the channels. The circuit has a metal shielding partition, and the metal shielding partition is equipped with a grounding component; the low-pass filter module is a low-pass filter module formed by two or more low-pass filters connected in parallel, the input terminal of each low-pass filter is connected to the input port of the junction box through a signal line, and the output terminal of each low-pass filter is connected to the output port of the junction box through a signal line; the low-pass filter is 5k±500Hz; the signal line is a radio frequency signal line; the insulating integrated box is equipped with a guide plate extending along the direction of the ventilation opening, and the guide plate and the low-pass filter module form a directional heat dissipation channel.

[0008] Furthermore, the signal distribution box has 10-10 channels. The metal shielding partition is made of copper and has a thickness of 0.8-1.2mm.

[0009] Furthermore, the low-pass filter module is a module formed by connecting 10 low-pass filters in parallel.

[0010] Furthermore, the signal line is a radio frequency (RF) signal line; even further, the signal line uses gold-plated copper wire for the inner conductor and connector, and an outer insulation layer resistant to 200°C, and is wrapped with a copper wire braided shielding layer. This reduces surface oxidation and corrosion, while providing good contact conductivity and achieving better transmission performance.

[0011] Furthermore, the guide plate has an inclined air guide surface at the end facing the fan, and the guide plate is made of aluminum alloy with heat dissipation fins on its surface.

[0012] Furthermore, the aforementioned integrated insulation box is a rigid, transparent insulating box; even further, an air filter, such as a HEPA high-efficiency air filter, is installed in the ventilation opening where no fan is installed, and is detachably connected to the ventilation opening via a snap-fit ​​structure.

[0013] Furthermore, the regulated power supply is a rechargeable independent power supply located on top of the insulated integrated box.

[0014] The beneficial effects of this utility model are: This utility model provides a multi-channel low-pass filter device for battery products, which is creatively assembled using existing simple and inexpensive components. It can not only be used for multi-channel testing of the same project, but also significantly shortens the testing time and cycle, greatly reducing testing costs compared to previously used equipment. This integrated device is small in size, has good insulation, and is suitable for any testing environment. Test engineers in this field can easily carry it with them when traveling, making it convenient to use.

[0015] Meanwhile, the multi-channel low-pass filter device for battery products of this utility model uses a grounded metal shielding partition inside the junction box to block channel crosstalk, and the double-layer shielding structure of the signal lines reduces transmission loss, resulting in better test data accuracy than existing independent testing equipment. The guide plate and fan work together to form directional airflow, resulting in significant overall heat dissipation and good conductivity. This allows the device to maintain good conductivity for extended testing without affecting the test results, further improving the stability and accuracy of the test data. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the main structure of the multi-channel low-pass filter device for battery products provided in this embodiment of the utility model.

[0017] Explanation of reference numerals in the attached figures: 1. Signal junction box, 2. Low-pass filter module, 3. Insulation integration box, 4. Fan 5. Regulated power supply; 6. Air filter Detailed Implementation

[0018] The specific embodiments described herein are merely illustrative of the technical solutions of this patent and are not intended to limit the scope of the disclosed technical solutions. It should also be noted that, for ease of description, the accompanying drawings show only the parts relevant to the technical solutions of this disclosure, and not the entire structure.

[0019] Before discussing the exemplary embodiments in more detail, it should be mentioned that the structure of the device components and / or modules mentioned in the embodiments, unless otherwise described in detail, is something that can be understood by those skilled in the art based on existing public technologies or is a commercially available product.

[0020] This embodiment provides a multi-channel low-pass filter device for battery products, including a signal junction box 1, a low-pass filter module 2, an insulating integrated box 3, a fan 4, and a regulated power supply 5. The signal junction box 1 and the regulated power supply 5 are located outside the insulating integrated box 3, while the low-pass filter module 2 is located inside the insulating integrated box 3. Ventilation openings are provided on the parallel side walls of the insulating integrated box 3. The fan 4 is located in one of the ventilation openings, and a removable air filter 6 is provided at the other ventilation opening. The regulated power supply 5 supplies power to the low-pass filter module 2 and the fan 4. The signal junction box 1 has 2 or more channels. The unit has internal metal shielding partitions that separate the channels, and these metal shielding partitions are equipped with grounding components. The low-pass filter module 2 is a low-pass filter module formed by two or more low-pass filters connected in parallel. The input terminal of each low-pass filter is connected to the input port of the junction box 1 via a signal line, and the output terminal of each low-pass filter is connected to the output port of the junction box 1 via a signal line. The low-pass filter is 5k±500Hz. The signal line is a radio frequency signal line. The insulating integrated box 3 has a guide plate extending along the direction of the ventilation opening, and the guide plate and the low-pass filter module 2 form a directional heat dissipation channel.

[0021] refer to Figure 1 The signal distribution box adopts a 10-channel design and has an internal copper metal shield with a thickness of 1mm. The bottom of the shield is grounded through a wire to ensure that the signal of each channel is transmitted independently.

[0022] The low-pass filter module consists of 10 low-pass filters connected in parallel at 5k±500Hz.

[0023] The insulated integrated box is made of transparent polycarbonate, making it easy to observe the internal working status. The aluminum alloy guide plate inside the box can be equipped with 3 sets of heat dissipation fins. The inclined air guide surface is at a 30° angle to the horizontal direction, guiding the airflow generated by the fan to flow evenly along the surface of the filter module, and then being discharged from the box through the HEPA air filter on the other side.

[0024] The signal line uses gold-plated copper wire for the inner conductor and connector, and a 200°C resistant polytetrafluoroethylene insulation layer on the outside. It is wrapped with a copper wire braided shielding layer to reduce surface oxidation, corrosion and electromagnetic interference, while providing good contact conductivity and better transmission performance.

[0025] The regulated power supply is a 12V rechargeable lithium battery, and three power indicator lights can be further installed on its top to indicate the full charge, half charge, and low charge status, respectively, for convenient real-time monitoring.

[0026] During testing, simply connect the testing instrument and 10 battery test samples to the input port on the signal junction box using wires. A regulated power supply powers the low-pass filter module and the fan. Once the fan is running, the airflow is guided by a baffle plate and flows evenly through each filter. Heat is conducted to the enclosure and expelled with the airflow, while the air filter prevents dust from entering. The combined effect of the metal shielding partition and the signal line shielding layer prevents signal crosstalk between channels, ensuring stable test data.

[0027] Figure 1 The example battery product multi-channel low-pass filter can simultaneously test 10 battery samples and meet standard testing requirements. While meeting these requirements, the simultaneous testing of 10-10 test channels significantly reduces costs compared to existing equipment.

[0028] It should be noted that while exemplary embodiments of this patent have been described above, these descriptions should not be construed as limiting. Rather, those skilled in the art can make various changes and modifications without departing from the scope of protection claimed by this patent as defined in the appended claims.

Claims

1. A multi-channel low-pass filter device for battery products, characterized in that: The system includes a signal junction box (1), a low-pass filter module (2), an insulating integrated box (3), a fan (4), and a regulated power supply (5). The signal junction box (1) and the regulated power supply (5) are located outside the insulating integrated box (3), while the low-pass filter module (2) is located inside the insulating integrated box (3). Ventilation openings are provided on the parallel side walls of the insulating integrated box (3). The fan (4) is located in one of the ventilation openings, and a removable air filter (6) is provided at the other ventilation opening. The regulated power supply (5) is used to power the low-pass filter module (2) and the fan (4). The signal junction box (1) has 2-2 or more channels. The internal structure is equipped with a metal shielding partition that separates each channel, and the metal shielding partition is equipped with a grounding component; the low-pass filter module (2) is a low-pass filter module formed by two or more low-pass filters connected in parallel, the input end of each low-pass filter is connected to the input port of the junction box (1) through a signal line, and the output end of each low-pass filter is connected to the output port of the junction box (1) through a signal line; the low-pass filter is 5k±500Hz; the signal line is a radio frequency signal line; the internal structure of the insulating integrated box (3) is equipped with a guide plate extending along the direction of the ventilation opening, and the guide plate and the low-pass filter module (2) form a directional heat dissipation channel.

2. The multi-channel low-pass filter device for battery products as described in claim 1, characterized in that: The signal junction box (1) has 10-10 channels; the metal shielding plate is a copper plate with a thickness of 0.8-1.2mm.

3. The multi-channel low-pass filter device for battery products as described in claim 1, characterized in that: The low-pass filter module (2) is a module formed by connecting 10 low-pass filters in parallel.

4. The multi-channel low-pass filter device for battery products as described in claim 1, characterized in that: The signal line uses gold-plated copper wire for the inner conductor and connector, and an outer insulating layer that can withstand temperatures up to 200°C. The signal line is also wrapped with a copper wire braided shielding layer.

5. The multi-channel low-pass filter device for battery products as described in claim 1, characterized in that: The aforementioned integrated insulation box (3) is a rigid transparent insulation box.

6. The multi-channel low-pass filter device for battery products as described in claim 1, characterized in that: The guide plate has an inclined air guide surface at one end facing the fan (4).

7. The multi-channel low-pass filter device for battery products as described in claim 1, characterized in that: The air guide plate is made of aluminum alloy and has heat dissipation fins on its surface.

8. The multi-channel low-pass filter device for battery products as described in claim 1, characterized in that: The regulated power supply (5) is a rechargeable independent power supply located on top of the insulating integrated box (3).

9. The multi-channel low-pass filter device for battery products as described in any one of claims 1-8, characterized in that: A HEPA high-efficiency air filter (6) is installed in the vent where no fan (4) is installed, and is detachably connected to the vent via a snap-fit ​​structure.

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