A multi-signal acquisition system based on FPC

Abstract

The utility model relates to the field of flexible circuit board especially relates to a kind of multi-signal acquisition system based on FPC, the multi-signal acquisition system based on FPC includes: FPC mainboard, pressure sampling unit, voltage sampling unit, temperature sampling unit, the pressure sampling unit includes N piezoelectric element, the N piezoelectric element is placed in the required sampling battery's electric core position.Affirmative effect:the multi-signal acquisition system based on FPC designed in the utility model, integrated pressure, temperature, voltage, current and so on multi-signal acquisition FPC, just can be collected including the multiple signals of pressure to the external docking one plug-in;The multi-signal acquisition system of the FPC, without separate signal collector and additional plug-in structure, reduce space occupancy and management cost.

Description

Technical Field

[0001] This utility model relates to the field of flexible circuit boards, and in particular to a multi-signal acquisition system based on FPC. Background Technology

[0002] As the market for new energy grows, the requirements for signal acquisition, detection, and processing in power energy and energy storage systems are becoming increasingly stringent. Conventional battery systems use FPCs (Flexible Printed Circuits), such as the one described in Chinese utility model patent CN222927741U (a battery pack FPC acquisition and connection structure), primarily for acquiring temperature and voltage signals. If pressure signals need to be acquired, a separate pressure sensor is required.

[0003] In existing technical solutions, NTC is integrated into the pressure sensor. However, the resistance signal and voltage signal need to be processed separately and are connected to different connectors, which are then inserted into the battery management system. This requires additional pressure acquisition components and additional connector structures. Furthermore, production, management, and assembly all need to be managed separately, which takes up more space and increases management costs. Utility Model Content

[0004] Purpose of the utility model: The purpose of this utility model is to solve the problems in the prior art and provide a multi-signal acquisition system based on FPC.

[0005] Technical solution: A multi-signal acquisition system based on FPC, comprising:

[0006] The FPC motherboard includes a pressure sampling unit, a voltage sampling unit, a temperature sampling unit, and a circuit connector. The pressure sampling unit, voltage sampling unit, and temperature sampling unit are electrically connected to the FPC motherboard via the circuit connector.

[0007] The pressure sampling unit includes N pressure-sensitive elements, which are placed at the cell location of the battery to be sampled.

[0008] Optionally, the pressure sampling unit further includes a first internal circuit, through which the pressure-sensitive element is electrically connected to a circuit connector.

[0009] Optionally, the FPC motherboard includes an upper film, a lower film, and an intermediate circuit, and the FPC motherboard is electrically connected to a circuit connector through the intermediate circuit.

[0010] Optionally, the intermediate circuit includes positive and negative terminals, and the material of the intermediate circuit is a metal conductor.

[0011] Optionally, the upper and lower films are PET films.

[0012] Optionally, the voltage sampling unit includes a nickel plate and a second internal circuit. The nickel plate is soldered to the cell tab of the battery to be sampled, and the nickel plate is electrically connected to a circuit connector through the second internal circuit.

[0013] Optionally, the temperature sampling unit includes an NTC and a third internal circuit. The NTC is attached to the outside of the battery cell where the battery temperature needs to be collected, and the NTC is electrically connected to a circuit connector through the third internal circuit.

[0014] Optionally, the circuit connector includes pins and a connector housing.

[0015] Optionally, the FPC-based multi-signal acquisition system further includes a current sampling unit.

[0016] Beneficial effects:

[0017] 1. The multi-signal acquisition system based on FPC designed in this utility model integrates FPC for acquiring multiple signals such as pressure, temperature, voltage, and current. It can acquire multiple signals, including pressure, by connecting to only one plug-in.

[0018] 2. The multi-signal acquisition system based on FPC designed in this utility model does not require a separate signal acquisition unit and additional connector structure, thus reducing space occupation and management costs;

[0019] 3. The FPC described in this utility model simultaneously collects information such as voltage, temperature and pressure on the battery system, and analyzes the state of the entire battery system based on different signals of the battery system, which facilitates risk and life assessment. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the circuit structure of the FPC-based multi-signal acquisition system described in this utility model;

[0021] Figure 2 This is a schematic diagram of the structure of the FPC motherboard described in this utility model.

[0022] Figure label:

[0023] 1. FPC main board; 11. Upper film; 12. Lower film; 13. Intermediate circuit; 2. Voltage sampling unit; 11. Nickel sheet; 12. Second internal circuit; 3. Temperature sampling unit; 31. NTC; 32. Third internal circuit; 4. Pressure sampling unit; 41. Pressure-sensitive element; 42. First internal circuit; 5. Circuit connector; 51. Pin; 52. Connector housing. Detailed Implementation

[0024] To make the technical solution of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0025] The technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model. Unless otherwise defined, the technical or scientific terms used herein should have the ordinary meaning understood by those skilled in the art to which this utility model pertains. The terms "comprising" and similar expressions used herein mean that the element or object preceding the word covers the element or object listed following the word and its equivalents, but does not exclude other elements or objects.

[0026] Example 1

[0027] A multi-signal acquisition system based on FPC, such as Figure 1 As shown, it includes:

[0028] The FPC motherboard 1, pressure sampling unit 4, voltage sampling unit 2, temperature sampling unit 3, and circuit connector 5 are electrically connected to the FPC motherboard 1 through the circuit connector 5.

[0029] The pressure sampling unit 4 includes N pressure-sensitive elements 41 and a first internal circuit 42. The pressure-sensitive elements 41 are placed at the cell position (where the swelling is most obvious) between adjacent battery cells of the battery to be sampled. The pressure-sensitive elements 41 are electrically connected to the circuit connector 5 through the first internal circuit 42. The pressure sampling unit 4 collects the pressure changes caused by the swelling of the battery during the use of the battery system, thereby assessing the state of the battery system.

[0030] The voltage sampling unit 2 includes a nickel plate 11 and a second internal circuit 12. The nickel plate 11 is soldered to the cell tab of the battery to be sampled, and the nickel plate 11 is electrically connected to the circuit connector 5 through the second internal circuit 12. The voltage sampling unit 2 is used to detect the voltage of a single battery cell.

[0031] The temperature sampling unit 3 includes an NTC (Negative Temperature Coefficient Thermistor) 31 and a third internal circuit 32. The NTC 31 is attached to the outside of the battery cell whose temperature needs to be collected, typically placed on either side of the battery or close to the copper busbar, depending on simulation or design requirements. The NTC 31 is electrically connected to the circuit connector 5 via the third internal circuit 32. The temperature sampling unit 3 is used to detect the temperature of a single battery cell.

[0032] The FPC-based multi-signal acquisition system may also include a current sampling unit.

[0033] The circuit connector 5 includes pins 51 and a connector housing 52. The pins 51 can be designed in different sizes according to different currents or resistance values, and the corresponding connector housing 52 can be adjusted to accommodate these changes. Furthermore, the connector plugs of the circuit connector 5 are for the output of all electrical signals and are evenly arranged; however, they can be designed separately if there are special requirements.

[0034] This invention designs a multi-signal acquisition system based on an FPC, which integrates multiple signals such as pressure, temperature, voltage, and current. Only one external plug-in is needed to acquire multiple signals, including pressure. The FPC-based multi-signal acquisition system eliminates the need for separate signal acquisition units and additional connectors, reducing space requirements and management costs. The FPC simultaneously acquires information such as voltage, temperature, and pressure from the battery system, analyzing the overall battery system status based on different signals, facilitating risk and lifespan assessment.

[0035] Example 2

[0036] A type of FPC motherboard, such as Figure 2 As shown, it includes:

[0037] The upper film 11, the lower film 12, and the intermediate circuit 13 are electrically connected to the FPC motherboard 1 through the intermediate circuit and the circuit connector 5.

[0038] The intermediate circuit 13 includes positive and negative terminals, and the material of the intermediate circuit 13 is a metal conductor.

[0039] The upper film 11 and the lower film 12 are PET films.

[0040] The embodiments described above are merely illustrative of several implementations of this utility model, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of this utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model patent should be determined by the appended claims.

Claims

1. A multi-signal acquisition system based on FPC, characterized in that, include: The system comprises an FPC motherboard, a pressure sampling unit, a voltage sampling unit, and a temperature sampling unit, wherein the pressure sampling unit, voltage sampling unit, and temperature sampling unit are electrically connected to the FPC motherboard via circuit connectors. The pressure sampling unit includes N pressure-sensitive elements, which are placed at the cell location of the battery to be sampled.

2. The multi-signal acquisition system based on FPC according to claim 1, characterized in that, The pressure sampling unit also includes a first internal circuit, and the pressure-sensitive element is electrically connected to a circuit connector through the first internal circuit.

3. The multi-signal acquisition system based on FPC according to claim 1, characterized in that, The FPC motherboard includes an upper film, a lower film, and an intermediate circuit. The FPC motherboard is electrically connected to a circuit connector through the intermediate circuit.

4. The FPC-based multi-signal acquisition system according to claim 3, characterized in that, The intermediate circuit includes positive and negative terminals, and the material of the intermediate circuit is a metallic conductor.

5. The FPC-based multi-signal acquisition system according to claim 3, characterized in that, The upper and lower films are PET films.

6. The multi-signal acquisition system based on FPC according to claim 1, characterized in that, The voltage sampling unit includes a nickel plate and a second internal circuit. The nickel plate is soldered onto the cell tab of the battery to be sampled, and the nickel plate is electrically connected to a circuit connector through the second internal circuit.

7. The FPC-based multi-signal acquisition system according to claim 1, characterized in that, The temperature sampling unit includes an NTC and a third internal circuit. The NTC is attached to the outside of the battery cell where the battery temperature needs to be collected, and the NTC is electrically connected to a circuit connector through the third internal circuit.

8. The multi-signal acquisition system based on FPC according to claim 1, characterized in that, The circuit connector includes pins and a connector housing.

9. The FPC-based multi-signal acquisition system according to claim 1, characterized in that, The FPC-based multi-signal acquisition system also includes a current sampling unit.

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