Electric signal collector

Abstract

The utility model provides an electric signal collector, which relates to the technical field of battery management, and adopts the main technical scheme that the input end of a voltage collection module is respectively connected with a TV1BATEN of a BMS (Battery Management System), a first input power supply and the positive electrode of a battery; the output end of the voltage acquisition module is connected with the common reference ground; the input end of the current acquisition module is connected with the common reference ground and the negative electrode of the battery; the input end of the monitoring module is respectively connected with the current acquisition module, the voltage acquisition module and the second input power supply; the input end of the communication isolation module is connected with the output end of the monitoring module; the input end of the communication isolation module is respectively connected with a first input power supply and a second input power supply; the output end of the communication isolation module is connected with the BMS. The monitoring module is used for simultaneously controlling the voltage acquisition module and the current acquisition module to correspondingly acquire voltage and current, so that the synchronism of measured voltage and current parameters is improved, and the influence of the battery management system on the SOC and SOH measurement precision and the safety state evaluation time is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of battery management, and more specifically, to an electric signal collector. Background Art

[0002] The battery management system can immediately obtain an assessment of the battery SOC, SOH and safety status by measuring the voltage, current and other parameters of the high-voltage battery pack.

[0003] In the prior art, voltage measurement is often performed through an external ADC, and current measurement is performed using a current Hall sensor. This method of measuring parameters such as voltage and current separately has the problem of poor measurement synchronization, which affects the battery management system's SOC and SOH measurement accuracy and safety status assessment time. Utility Model Content

[0004] The purpose of the utility model is to provide an electrical signal collector, which can use the monitoring module to simultaneously control the voltage acquisition module and the current acquisition module to correspondingly collect voltage and current, so as to improve the synchronization of measuring voltage and current parameters, and further reduce the influence of the battery management system on the SOC, SOH measurement accuracy and safety status assessment time.

[0005] The utility model is realized by the following technical solutions:

[0006] An electrical signal collector comprises a voltage acquisition module, a current acquisition module, a monitoring module and a communication isolation module, wherein the input end of the voltage acquisition module is used to be connected to TV1_BAT_EN of a BMS, a first input power supply and a positive electrode of a battery respectively; the output end of the voltage acquisition module is used to be connected to a common reference ground; the input end of the current acquisition module is used to be connected to a common reference ground and a negative electrode of a battery respectively; the input end of the monitoring module is used to be connected to the current acquisition module, the voltage acquisition module and a second input power supply respectively; the input end of the communication isolation module is connected to the output end of the monitoring module; and the input end of the communication isolation module is also used to be connected to the first input power supply and the second input power supply respectively; the output end of the communication isolation module is used to be connected to a BMS.

[0007] Optionally, the electrical signal collector also includes a connector J3; the B6 pin of the connector J3 is used to connect to the common reference ground; the B5 pin of the connector J3 is used to connect to the negative pole of the battery; the A6 pin and the A5 pin of the connector J3 are used to connect to the input end of the current acquisition module respectively.

[0008] Optionally, the current acquisition module includes a common mode filter T5, a resistor R208, a resistor R209, capacitors C113, C114, C115, C116, C117, C118, C119 and C120, and ferrite beads FB17, FB18, FB19 and FB20; pin 3 of the common mode filter T5, one end of the capacitor C118, and one end of the ferrite bead FB18 are all used to connect to pin A5 of the connector J3; pin 1 of the common mode filter T5, the other end of the ferrite bead FB18, and one end of the capacitor C117 are all connected to one end of the ferrite bead FB17; the other end of the ferrite bead FB17, one end of the capacitor C116, and one end of the capacitor C114 are all connected to one end of the resistor R208; the other end of the resistor R208, one end of the capacitor C113, and one end of the capacitor C115 They are all connected to the input end of the monitoring module; pin 4 of the common mode filter T5, the other end of the capacitor C118, and one end of the ferrite bead FB20 are all used to connect to pin A6 of the connector J3; pin 2 of the common mode filter T5, the other end of the ferrite bead FB20, and the other end of the capacitor C117 are all connected to one end of the ferrite bead FB19; the other end of the ferrite bead FB19, the other end of the capacitor C116, and one end of the capacitor C120 are all connected to one end of the resistor R209; the other end of the capacitor C114 and the other end of the capacitor C120 are both used to connect to TV1_GND; the other end of the resistor R209, one end of the capacitor C119, and the other end of the capacitor C115 are all used to connect to the input end of the monitoring module; the other end of the capacitor C113 and the other end of the capacitor C119 are both used to connect to TV1_GND.

[0009] Optionally, the electrical signal collector also includes a resistor R205 and a ferrite bead FB22; one end of the resistor R205 is used to connect to the second input power supply; the other end of the resistor R205 is used to connect to the A5 pin of the connector J3; one end of the ferrite bead FB22 is used to connect to the A6 pin of the connector J3; the other end of the ferrite bead FB22 is used to connect to TV1_GND.

[0010] Optionally, the monitoring module includes a chip U33, a resistor R206, a ferrite bead FB16, a capacitor C109 and a capacitor C110; pins 1 and 2 of the chip U33 are both used to connect to TV1_GND; pin 3 of the chip U33 is connected to one end of the resistor R206; the other end of the resistor R206 is used to connect to the second input power supply; pins 4 and 5 of the chip U33 are both connected to the input end of the communication isolation module; pin 6 of the chip U33 is connected to one end of the capacitor C109, one end of the capacitor C110, and one end of the ferrite bead FB16 The other end of the ferrite bead FB16 is used to be connected to the second input power supply; the other end of the capacitor C109 and the other end of the capacitor C110 are both used to be connected to TV1_GND; pin 7 of the chip U33 is used to be connected to TV1_GND; pin 8 of the chip U33 is connected to the voltage acquisition module; pin 9 of the chip U33 is connected to the other end of the resistor R208, one end of the capacitor C113, and one end of the capacitor C115; pin 10 of the chip U33 is connected to the other end of the resistor R209, one end of the capacitor C119, and the other end of the capacitor C115.

[0011] Optionally, the communication isolation module includes a chip U34, a resistor R210, a resistor R211, a resistor R212, a resistor R213, a capacitor C121, a capacitor C122, a capacitor C123, a capacitor C124, a capacitor C125 and a capacitor C126; pin 1 of the chip U34, one end of the capacitor C121, one end of the resistor R210, and one end of the resistor R213 are all used to connect to the first input power supply; the other end of the capacitor C121 is connected to the battery ground BGND; the other end of the resistor R210 and one end of the capacitor C124 are both used to connect to CUR_SDA of the BMS; the other end of the resistor R213 and one end of the capacitor C123 are both used to connect to CUR_SCL of the BMS; the other end of the capacitor C123 and the other end of the capacitor C124 are both used to connect to the battery ground BGND; pin 2 of the chip U34 is used to connect to the BMS CUR_SDA is connected; pin 3 of chip U34 is used to connect to CUR_SCL of BMS; pin 4 of chip U34 is used to connect to battery ground BGND; pin 5 of chip U34 and one end of capacitor C122 are both used to connect to battery ground BGND; pin 6 of chip U34 is connected to pin 5 of chip U33; pin 7 of chip U34 is connected to pin 4 of chip U33; pin 8 of chip U34, the other end of capacitor C122, one end of resistor R211, and one end of resistor R212 are all used to connect to the second input power supply; the other end of resistor R211 and one end of capacitor C125 are both connected to pin 4 of chip U33; the other end of resistor R212 and one end of capacitor C126 are both connected to pin 5 of chip U33; the other end of capacitor C125 and the other end of capacitor C126 are both used to connect to TV1_GND.

[0012] Optionally, the voltage acquisition module includes a chip U45, a transistor Q24, a first resistance unit, a second resistance unit, a resistor R202, a resistor R281, a resistor R293, a resistor R304, a ferrite bead FB44, a ferrite bead FB45, a capacitor C183 and a capacitor C184; one end of the resistor R304 is used to connect to TV1_BAT_EN of the BMS; the other end of the resistor R304 and one end of the resistor R293 are both connected to the base of the transistor Q24; the other end of the resistor R293 and the emitter of the transistor Q24 are both used to connect to the battery ground BGND; pin 5 of the chip U45 is connected to the collector of the transistor Q24; pin 4 of the chip U45 is connected to one end of the resistor R202; the other end of the resistor R202 is used It is connected to the first input power supply; pins 15 and 16 of chip U45 are used to connect to one end of the first resistance unit; the other end of the first resistance unit is used to connect to the positive electrode of the battery; pins 9 and 10 of chip U45 are connected to one end of the second resistance unit; the other end of the second resistance unit is connected to one end of resistor R281, one end of capacitor C183, and one end of ferrite bead FB44; the other end of ferrite bead FB44 and one end of capacitor C184 are connected to pin 8 of chip U33; one end of ferrite bead FB45 and the other end of capacitor C184 are used to connect to TV1_GND; the other end of ferrite bead FB45, the other end of resistor R281, and the other end of capacitor C183 are used to connect to the common reference ground.

[0013] Optionally, the first resistance unit includes resistor R280, resistor R295, resistor R303 and resistor R335; one end of resistor R280 is connected to pins 15 and 16 of chip U45; the other end of resistor R280 is connected to one end of resistor R303; the other end of resistor R303 is connected to one end of resistor R295; the other end of resistor R295 is connected to one end of resistor R335; the other end of resistor R335 is used to be connected to the positive pole of the battery.

[0014] Optionally, the second resistance unit includes resistor R279, resistor R282, resistor R290 and resistor R305; one end of resistor R279 is connected to pins 9 and 10 of chip U45; the other end of resistor R279 is connected to one end of resistor R282; the other end of resistor R282 is connected to one end of resistor R290; the other end of resistor R290 is connected to one end of resistor R305; the other end of resistor R305 is connected to one end of resistor R281, one end of capacitor C183, and one end of ferrite bead FB44.

[0015] Optionally, the electrical signal collector also includes a ground isolation module; the ground isolation module includes capacitor C132, capacitor C133 and capacitor C194; one end of capacitor C132 is used to connect to TV1_GND; the other end of capacitor C132 is connected to one end of capacitor C133; the other end of capacitor C133 is connected to one end of capacitor C194; the other end of capacitor C194 is used to connect to the ground wire PE1.

[0016] Compared with the prior art, the utility model has the following advantages and beneficial effects:

[0017] The input end of the voltage acquisition module is used to connect to TV1_BAT_EN of BMS, the first input power supply, and the positive electrode of the battery respectively; the output end of the voltage acquisition module is used to connect to the common reference ground; the input end of the current acquisition module is used to connect to the common reference ground and the negative electrode of the battery; the input end of the monitoring module is used to connect to the current acquisition module, the voltage acquisition module, and the second input power supply respectively; the input end of the communication isolation module is connected to the output end of the monitoring module; and the input end of the communication isolation module is also used to connect to the first input power supply and the second input power supply respectively; the output end of the communication isolation module is used to connect to the BMS. The purpose of using the monitoring module to simultaneously control the voltage acquisition module and the current acquisition module to collect voltage and current accordingly is achieved, so as to improve the synchronization of measuring voltage and current parameters, thereby reducing the impact of the battery management system on the SOC and SOH measurement accuracy and safety status assessment time. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions of the exemplary embodiments of the present utility model, the following is a brief introduction to the drawings required for use in the embodiments. It should be understood that the following drawings only illustrate certain embodiments of the present utility model, and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without creative work. In the drawings:

[0019] Figure 1 This is a schematic diagram of an electrical block diagram of an electrical signal collector in an embodiment;

[0020] Figure 2 A schematic diagram of the circuit structure topology of a voltage acquisition module for an electrical signal collector in an embodiment;

[0021] Figure 3 A schematic diagram of the circuit structure topology of a current acquisition module for an electrical signal collector in an embodiment;

[0022] Figure 4 A schematic diagram of the circuit structure topology of a monitoring module for an electrical signal collector in an embodiment;

[0023] Figure 5 A schematic diagram of the circuit structure topology of a communication isolation module for an electrical signal collector in an embodiment;

[0024] Figure 6 A schematic diagram of the circuit structure topology of a ground isolation module for an electrical signal collector in an embodiment;

[0025] Figure 7 The figure is a schematic diagram of the circuit structure topology of a connector for an electrical signal collector in an embodiment.

[0026] Marks and corresponding parts names in the attached drawings:

[0027] 100-voltage acquisition module; 200-current acquisition module; 300-monitoring module; 400-communication isolation module. DETAILED DESCRIPTION

[0028] In order to make the purpose, technical solutions and advantages of the utility model more clearly understood, the utility model is further described in detail below in conjunction with embodiments and drawings. The schematic implementation manner of the utility model and its description are only used to explain the utility model and are not intended to limit the utility model.

[0029] Example:

[0030] An electrical signal collector, such as Figure 1-Figure 7 As shown, it includes a voltage acquisition module 100, a current acquisition module 200, a monitoring module 300 and a communication isolation module 400, wherein the input end of the voltage acquisition module 100 is used to be connected to TV1_BAT_EN of the BMS, the first input power supply (E5V), and the positive electrode of the battery respectively; the output end of the voltage acquisition module 100 is used to be connected to the common reference ground (COM_TV); the input end of the current acquisition module 200 is used to be connected to the common reference ground and the negative electrode of the battery respectively; the input end of the monitoring module 300 is used to be connected to the current acquisition module 200, the voltage acquisition module 100, and the second input power supply (TV1_5V) respectively; the input end of the communication isolation module 400 is connected to the output end of the monitoring module 300; and the input end of the communication isolation module 400 is also used to be connected to the first input power supply and the second input power supply respectively; the output end of the communication isolation module 400 is used to be connected to the BMS (battery management system).

[0031] In this embodiment, the electrical signal collector also includes a connector J3; Figure 7 As shown, the B6 pin of the connector J3 is used to connect to the common reference ground; the B5 pin of the connector J3 is used to connect to the negative pole of the battery; the A6 pin and the A5 pin of the connector J3 are used to connect to the input end of the current acquisition module 200 respectively.

[0032] In this embodiment, if Figure 3 As shown, the current acquisition module 200 includes a common mode filter T5, a resistor R208, a resistor R209, capacitors C113, C114, C115, C116, C117, C118, C119 and C120, and ferrite beads FB17, FB18, FB19 and FB20; pin 3 of the common mode filter T5, one end of the capacitor C118, and one end of the ferrite bead FB18 are all used to connect to pin A5 of the connector J3; pin 1 of the common mode filter T5, the other end of the ferrite bead FB18, and one end of the capacitor C117 are all connected to one end of the ferrite bead FB17; the other end of the ferrite bead FB17, one end of the capacitor C116, and one end of the capacitor C114 are all connected to one end of the resistor R208; the other end of the resistor R208, one end of the capacitor C113, and one end of the capacitor C115 are all connected to The input end of the monitoring module 300 is connected; pin 4 of the common mode filter T5, the other end of the capacitor C118, and one end of the ferrite bead FB20 are all used to connect to pin A6 of the connector J3; pin 2 of the common mode filter T5, the other end of the ferrite bead FB20, and the other end of the capacitor C117 are all connected to one end of the ferrite bead FB19; the other end of the ferrite bead FB19, the other end of the capacitor C116, and one end of the capacitor C120 are all connected to one end of the resistor R209; the other end of the capacitor C114 and the other end of the capacitor C120 are both used to connect to TV1_GND; the other end of the resistor R209, one end of the capacitor C119, and the other end of the capacitor C115 are all used to connect to the input end of the monitoring module 300; the other end of the capacitor C113 and the other end of the capacitor C119 are both used to connect to TV1_GND.

[0033] In this embodiment, the electrical signal collector further includes a resistor R205 and a ferrite bead FB22; Figure 3 As shown, one end of the resistor R205 is used to connect to the second input power supply; the other end of the resistor R205 is used to connect to the A5 pin of the connector J3; one end of the ferrite bead FB22 is used to connect to the A6 pin of the connector J3; the other end of the ferrite bead FB22 is used to connect to TV1_GND.

[0034] In this embodiment, if Figure 4As shown, the monitoring module 300 includes a chip U33, a resistor R206, a ferrite bead FB16, a capacitor C109 and a capacitor C110; pins 1 and 2 of the chip U33 are both used to connect to TV1_GND; pin 3 of the chip U33 is connected to one end of the resistor R206; the other end of the resistor R206 is used to connect to the second input power supply; pins 4 and 5 of the chip U33 are both connected to the input end of the communication isolation module 400; pin 6 of the chip U33 is connected to one end of the capacitor C109, one end of the capacitor C110, and one end of the ferrite bead FB16 connection; the other end of the ferrite bead FB16 is used to connect to the second input power supply; the other end of the capacitor C109 and the other end of the capacitor C110 are both used to connect to TV1_GND; pin 7 of the chip U33 is used to connect to TV1_GND; pin 8 of the chip U33 is connected to the voltage acquisition module 100; pin 9 of the chip U33 is connected to the other end of the resistor R208, one end of the capacitor C113, and one end of the capacitor C115; pin 10 of the chip U33 is connected to the other end of the resistor R209, one end of the capacitor C119, and the other end of the capacitor C115.

[0035] In this embodiment, if Figure 5As shown, the communication isolation module 400 includes a chip U34, a resistor R210, a resistor R211, a resistor R212, a resistor R213, a capacitor C121, a capacitor C122, a capacitor C123, a capacitor C124, a capacitor C125 and a capacitor C126; pin 1 of the chip U34, one end of the capacitor C121, one end of the resistor R210, and one end of the resistor R213 are all used to connect to the first input power supply; the other end of the capacitor C121 is connected to the battery ground BGND; the other end of the resistor R210 and one end of the capacitor C124 are both used to connect to CUR_SDA of the BMS; the other end of the resistor R213 and one end of the capacitor C123 are both used to connect to CUR_SCL of the BMS; the other end of the capacitor C123 and the other end of the capacitor C124 are both used to connect to the battery ground BGND; pin 2 of the chip U34 is used to connect to the BMS CUR_SDA of chip U34 is connected; pin 3 of chip U34 is used to connect to CUR_SCL of BMS; pin 4 of chip U34 is used to connect to battery ground BGND; pin 5 of chip U34 and one end of capacitor C122 are both used to connect to battery ground BGND; pin 6 of chip U34 is connected to pin 5 of chip U33; pin 7 of chip U34 is connected to pin 4 of chip U33; pin 8 of chip U34, the other end of capacitor C122, one end of resistor R211, and one end of resistor R212 are all used to connect to the second input power supply; the other end of resistor R211 and one end of capacitor C125 are both connected to pin 4 of chip U33; the other end of resistor R212 and one end of capacitor C126 are both connected to pin 5 of chip U33; the other end of capacitor C125 and the other end of capacitor C126 are both used to connect to TV1_GND.

[0036] In this embodiment, if Figure 2As shown, the voltage acquisition module 100 includes a chip U45, a transistor Q24, a first resistance unit, a second resistance unit, a resistor R202, a resistor R281, a resistor R293, a resistor R304, a ferrite bead FB44, a ferrite bead FB45, a capacitor C183 and a capacitor C184; one end of the resistor R304 is used to connect to TV1_BAT_EN of the BMS; the other end of the resistor R304 and one end of the resistor R293 are both connected to the base of the transistor Q24; the other end of the resistor R293 and the emitter of the transistor Q24 are both used to connect to the battery ground BGND; the No. 5 pin of the chip U45 is connected to the collector of the transistor Q24; the No. 4 pin of the chip U45 is connected to one end of the resistor R202; the other end of the resistor R202 Used to connect to the first input power supply; pins 15 and 16 of chip U45 are used to connect to one end of the first resistance unit; the other end of the first resistance unit is used to connect to the positive electrode of the battery; pins 9 and 10 of chip U45 are connected to one end of the second resistance unit; the other end of the second resistance unit is connected to one end of resistor R281, one end of capacitor C183, and one end of ferrite bead FB44; the other end of ferrite bead FB44 and one end of capacitor C184 are connected to pin 8 of chip U33; one end of ferrite bead FB45 and the other end of capacitor C184 are used to connect to TV1_GND; the other end of ferrite bead FB45, the other end of resistor R281, and the other end of capacitor C183 are used to connect to the common reference ground.

[0037] In this embodiment, if Figure 2 As shown, the first resistor unit includes resistor R280, resistor R295, resistor R303 and resistor R335; one end of resistor R280 is connected to pins 15 and 16 of chip U45; the other end of resistor R280 is connected to one end of resistor R303; the other end of resistor R303 is connected to one end of resistor R295; the other end of resistor R295 is connected to one end of resistor R335; the other end of resistor R335 is used to connect to the positive electrode of the battery.

[0038] In this embodiment, if Figure 2 As shown, the second resistor unit includes resistor R279, resistor R282, resistor R290 and resistor R305; one end of resistor R279 is connected to pin 9 and pin 10 of chip U45; the other end of resistor R279 is connected to one end of resistor R282; the other end of resistor R282 is connected to one end of resistor R290; the other end of resistor R290 is connected to one end of resistor R305; the other end of resistor R305 is connected to one end of resistor R281, one end of capacitor C183, and one end of ferrite bead FB44.

[0039] In this embodiment, the electrical signal collector further includes a ground isolation module; Figure 6 As shown, the ground isolation module includes capacitor C132, capacitor C133 and capacitor C194; one end of capacitor C132 is used to connect to TV1_GND; the other end of capacitor C132 is connected to one end of capacitor C133; the other end of capacitor C133 is connected to one end of capacitor C194; the other end of capacitor C194 is used to connect to ground line PE1.

[0040] This embodiment provides an electrical signal collector, the working principle of which is as follows:

[0041] When the internal total pressure needs to be collected, the signal TV1_BAT_EN is generated to close the internal total pressure collection switch U45. At this time, the collection chip U33 collects the internal total pressure value through the VBUS pin, and then the chip sends the collected voltage value to the MCU after isolation through the IIC communication method (SDA, SCL), and the MCU calculates the corresponding voltage value.

[0042] When the shunt current value needs to be collected, the voltage values ​​corresponding to different currents flowing through the shunt are filtered, and the corresponding voltage values ​​are collected through the current collection channel (IN+, IN-) of the collection chip U33. Then the chip sends the collected voltage values ​​to the MCU after isolation through the IIC communication method (SDA, SCL), and the MCU calculates the corresponding current value.

[0043] The specific implementation methods described above further illustrate the purpose, technical solutions and beneficial effects of the utility model in detail. It should be understood that the above description is only the specific implementation method of the utility model and is not used to limit the protection scope of the utility model. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the utility model should be included in the protection scope of the utility model.

Claims

1. An electrical signal collector, characterized in that: include: A voltage acquisition module (100), wherein the input end of the voltage acquisition module (100) is used to be connected to TV1_BAT_EN of the BMS, the first input power source, and the positive electrode of the battery respectively; and the output end of the voltage acquisition module (100) is used to be connected to a common reference ground; A current acquisition module (200), wherein an input end of the current acquisition module (200) is used to be connected to a common reference ground and a negative electrode of a battery respectively; A monitoring module (300), the input end of the monitoring module (300) being used to be connected to the current acquisition module (200), the voltage acquisition module (100), and a second input power source respectively; A communication isolation module (400), wherein the input end of the communication isolation module (400) is connected to the output end of the monitoring module (300); and the input end of the communication isolation module (400) is also used to be connected to a first input power source and a second input power source respectively; and the output end of the communication isolation module (400) is used to be connected to a BMS.

2. The electrical signal collector according to claim 1, characterized in that: Also includes connector J3; The B6 pin of the connector J3 is used to connect to the common reference ground; The B5 pin of the connector J3 is used to connect to the negative pole of the battery; The A6 pin and the A5 pin of the connector J3 are used to be connected to the input end of the current acquisition module (200) respectively.

3. The electrical signal collector according to claim 2, characterized in that: The current acquisition module (200) comprises a common mode filter T5, a resistor R208, a resistor R209, capacitors C113, C114, C115, C116, C117, C118, C119 and C120, and ferrite beads FB17, FB18, FB19 and FB20; Pin 3 of the common mode filter T5, one end of the capacitor C118, and one end of the ferrite bead FB18 are all used to connect to pin A5 of the connector J3; Pin 1 of the common mode filter T5, the other end of the ferrite bead FB18, and one end of the capacitor C117 are all connected to one end of the ferrite bead FB17; The other end of the ferrite bead FB17, one end of the capacitor C116, and one end of the capacitor C114 are all connected to one end of the resistor R208; The other end of the resistor R208, one end of the capacitor C113, and one end of the capacitor C115 are all connected to the input end of the monitoring module (300); Pin 4 of the common mode filter T5, the other end of the capacitor C118, and one end of the ferrite bead FB20 are all used to connect to pin A6 of the connector J3; Pin 2 of the common mode filter T5, the other end of the ferrite bead FB20, and the other end of the capacitor C117 are all connected to one end of the ferrite bead FB19; The other end of the ferrite bead FB19, the other end of the capacitor C116, and one end of the capacitor C120 are all connected to one end of the resistor R209; The other end of the capacitor C114 and the other end of the capacitor C120 are both used to connect to TV1_GND; The other end of the resistor R209, one end of the capacitor C119, and the other end of the capacitor C115 are all used to be connected to the input end of the monitoring module (300); The other end of the capacitor C113 and the other end of the capacitor C119 are both connected to TV1_GND.

4. The electrical signal collector according to claim 2, characterized in that: Also included is a resistor R205 and a ferrite bead FB22; One end of the resistor R205 is used for connecting to a second input power source; The other end of the resistor R205 is used to connect to the A5 pin of the connector J3; One end of the ferrite bead FB22 is used to connect to the A6 pin of the connector J3; The other end of the ferrite bead FB22 is used to connect to TV1_GND.

5. The electrical signal collector according to claim 3, characterized in that: The monitoring module (300) comprises a chip U33, a resistor R206, a ferrite bead FB16, a capacitor C109 and a capacitor C110; Pins 1 and 2 of chip U33 are used to connect to TV1_GND; Pin 3 of chip U33 is connected to one end of resistor R206; The other end of the resistor R206 is used to connect to the second input power supply; Pins 4 and 5 of the chip U33 are both connected to the input end of the communication isolation module (400); Pin 6 of chip U33 is connected to one end of capacitor C109, one end of capacitor C110, and one end of ferrite bead FB16; The other end of the ferrite bead FB16 is used to connect to the second input power supply; The other end of the capacitor C109 and the other end of the capacitor C110 are both used to connect to TV1_GND; Pin 7 of chip U33 is used to connect to TV1_GND; Pin 8 of the chip U33 is connected to the voltage acquisition module (100); Pin 9 of chip U33 is connected to the other end of resistor R208, one end of capacitor C113, and one end of capacitor C115; Pin 10 of chip U33 is connected to the other end of resistor R209, one end of capacitor C119, and the other end of capacitor C115.

6. The electrical signal collector according to claim 5, characterized in that: The communication isolation module (400) comprises a chip U34, a resistor R210, a resistor R211, a resistor R212, a resistor R213, a capacitor C121, a capacitor C122, a capacitor C123, a capacitor C124, a capacitor C125 and a capacitor C126; Pin 1 of the chip U34, one end of the capacitor C121, one end of the resistor R210, and one end of the resistor R213 are all used to connect to the first input power supply; The other end of the capacitor C121 is connected to the battery ground BGND; The other end of the resistor R210 and one end of the capacitor C124 are both used to connect to CUR_SDA of the BMS; The other end of the resistor R213 and one end of the capacitor C123 are both used to connect to CUR_SCL of the BMS; The other end of the capacitor C123 and the other end of the capacitor C124 are both used to connect to the battery ground BGND; Pin 2 of chip U34 is used to connect to CUR_SDA of BMS; Pin 3 of chip U34 is used to connect to CUR_SCL of BMS; Pin 4 of chip U34 is used to connect to the battery ground BGND; Pin 5 of chip U34 and one end of capacitor C122 are used to connect to the battery ground BGND; Pin 6 of chip U34 is connected to pin 5 of chip U33; Pin 7 of chip U34 is connected to pin 4 of chip U33; Pin 8 of chip U34, the other end of capacitor C122, one end of resistor R211, and one end of resistor R212 are all used to connect to the second input power supply; The other end of the resistor R211 and one end of the capacitor C125 are connected to pin 4 of the chip U33; The other end of the resistor R212 and one end of the capacitor C126 are connected to pin 5 of the chip U33; The other end of the capacitor C125 and the other end of the capacitor C126 are both connected to TV1_GND.

7. The electrical signal collector according to claim 5, characterized in that: The voltage acquisition module (100) comprises a chip U45, a transistor Q24, a first resistance unit, a second resistance unit, a resistor R202, a resistor R281, a resistor R293, a resistor R304, a ferrite bead FB44, a ferrite bead FB45, a capacitor C183 and a capacitor C184; One end of the resistor R304 is used to connect to TV1_BAT_EN of the BMS; The other end of the resistor R304 and one end of the resistor R293 are both connected to the base of the transistor Q24; The other end of the resistor R293 and the emitter of the transistor Q24 are both used to connect to the battery ground BGND; Pin 5 of chip U45 is connected to the collector of transistor Q24; Pin 4 of chip U45 is connected to one end of resistor R202; The other end of the resistor R202 is used to be connected to the first input power source; Pins 15 and 16 of chip U45 are both used to connect to one end of the first resistor unit; The other end of the first resistor unit is used to be connected to the positive electrode of the battery; Pins 9 and 10 of chip U45 are connected to one end of the second resistor unit; The other end of the second resistance unit is connected to one end of the resistor R281, one end of the capacitor C183, and one end of the ferrite bead FB44; The other end of the ferrite bead FB44 and one end of the capacitor C184 are connected to pin 8 of the chip U33; One end of the ferrite bead FB45 and the other end of the capacitor C184 are used to connect to TV1_GND; The other end of the ferrite bead FB45, the other end of the resistor R281, and the other end of the capacitor C183 are all used to be connected to a common reference ground.

8. The electrical signal collector according to claim 7, characterized in that: The first resistance unit includes a resistor R280, a resistor R295, a resistor R303 and a resistor R335; One end of resistor R280 is connected to both pin 15 and pin 16 of chip U45; The other end of the resistor R280 is connected to one end of the resistor R303; The other end of the resistor R303 is connected to one end of the resistor R295; The other end of the resistor R295 is connected to one end of the resistor R335; The other end of the resistor R335 is used to be connected to the positive electrode of the battery.

9. The electrical signal collector according to claim 8, characterized in that: The second resistance unit includes a resistor R279, a resistor R282, a resistor R290 and a resistor R305; One end of resistor R279 is connected to both pin 9 and pin 10 of chip U45; The other end of the resistor R279 is connected to one end of the resistor R282; The other end of the resistor R282 is connected to one end of the resistor R290; The other end of the resistor R290 is connected to one end of the resistor R305; The other end of the resistor R305 is connected to one end of the resistor R281, one end of the capacitor C183, and one end of the ferrite bead FB44.

10. The electrical signal collector according to claim 1, characterized in that: Also includes ground isolation module; The ground isolation module includes capacitor C132, capacitor C133 and capacitor C194; One end of capacitor C132 is used to connect to TV1_GND; The other end of capacitor C132 is connected to one end of capacitor C133; The other end of capacitor C133 is connected to one end of capacitor C194; The other end of the capacitor C194 is used to be connected to the ground line PE1.

Images