WO2017113524A1

WO2017113524A1 - Battery state supervision system

Info

Publication number: WO2017113524A1
Application number: PCT/CN2016/077872
Authority: WO
Inventors: 顾健
Original assignee: 深圳市个联科技有限公司
Priority date: 2015-12-28
Filing date: 2016-03-30
Publication date: 2017-07-06

Abstract

A battery state supervision system, the battery being connected to an electric device, comprising: a sampling resistor (Rsense), of which a first end is connected to an electrode of the battery (10), and a second end is connected to a charging and discharging interface; a sampling circuit (20) connected to the two ends of the sampling resistor (Rsense) for sampling a current flowing through the sampling resistor (Rsense) and processing same to obtain electrical data; an analysis unit (30) connected to the sampling circuit (20), for receiving the electrical data and comparing and analysing a sudden load change state of a current electric device; and a sending unit (40) connected to the analysis unit (30), for receiving a current sudden load change state and sending same to a user terminal (400) via a network. According to the battery state supervision system, a sampling circuit (20) is used to sample in real time a charging or discharging current of an electrode of a battery (10) and process same into sampling data by means of amplification, currently sampled sampling data is compared with pre-stored sampling data via an analysis unit (30) so as to obtain a comparison result which can determine a load sudden-change state of an electric device, and the comparison result is sent to a user terminal via a network to inform a user. The battery state supervision system is short in sampling time and precise in sampling result, and is capable of realizing real-time supervision and informing and is high in efficiency.

Description

Battery Condition Monitoring System Technical Field

[0001] The present invention relates to battery monitoring technology, and more particularly to a battery state monitoring system.

Background technique

[0002] A conventional battery or battery pack is widely used in electronic devices, and supplies power to electronic devices such as notebook computers, mobile phones, security alarms, and the like. At present, batteries are widely used in daily life and national production due to environmental protection. However, in the application and production process (chemicalization), the battery often needs to monitor its voltage and current for safe use, optimized control, and improved performance.

[0003] Many domestic organizations have begun to study new methods to automatically monitor batteries. In battery monitoring, it mainly detects the battery cell voltage, battery voltage, current and temperature. At present, a great deal of research has been conducted on the measurement of the cell voltage in a series battery pack. There are three main methods: First, use the relay to constantly switch each battery in the battery pack, so that every battery has a battery detected. This method has serious drawbacks, the switching speed is slow, and the accuracy cannot be calculated. The voltage value, and easy to introduce interference, has been eliminated; Second, the analog cell is used to gate the voltage channel of the single cell. This method also has certain disadvantages, the circuit is complicated, in the small signal range. The linearity is poor and the precision is low. Thirdly, the photoelectric isolation device and the large capacitance are used for sampling and holding. However, such a circuit also has the disadvantages of long sampling length and low precision.

technical problem

[0004] The object of the present invention is to provide a battery state monitoring system capable of monitoring the state of a battery, which aims to solve the problem that the current monitoring mode of the battery state is inefficient and the sampling time is long.

Problem solution

Technical solution

[0005] The present invention provides a battery state monitoring system, the battery is connected to the electrical device, including: [0006] a sampling resistor, the first end is connected to the electrode of the battery, and the second end is connected to the charging and discharging interface;

[0007] a sampling circuit is connected to both ends of the sampling resistor, and samples a current flowing through the sampling resistor and processes the sampled data; [0008] an analyzing unit, connected to the sampling circuit, receiving the sampling data and comparing and analyzing a load abrupt state of the current powered device;

[0009] The sending unit is connected to the analyzing unit, and receives the current load abrupt state and sends the status to the user terminal through the network.

Advantageous effects of the invention

Beneficial effect

[0010] The battery state monitoring system uses the sampling circuit to accurately sample the charging or discharging current of the battery electrode and amplify the processing into sampling data, and compare the currently sampled sampling data with the pre-stored sampling data by the analyzing unit to obtain the user. The comparison result of the sudden change of the load of the device, and sending the comparison result to the user terminal through the network to notify the user that the battery state supervision system has short sampling time and accurate sampling result, and can realize real monitoring and notification, and has high efficiency.

Brief description of the drawing

DRAWINGS

1 is a schematic block diagram of a battery state monitoring system in accordance with a preferred embodiment of the present invention;

2 is a schematic diagram of an analysis unit and a transmission unit module of the battery state supervision system shown in FIG. 1;

3 is a schematic diagram of a sampling circuit and an indicating circuit of the battery state monitoring system shown in FIG. 1;

4 is a schematic structural view of an integrated battery device of the battery state monitoring system of FIG. 1 according to an embodiment; [0014] FIG.

5(A) and 5(B) are respectively a front view and a top plan view of a battery state monitoring system shown in FIG. 1 integrated into a battery device in another embodiment; [0015] FIG.

6 is a schematic structural view of a battery state monitoring system of FIG. 1 fixed to a battery device in an embodiment. [0016] FIG.

Embodiments of the invention

[0017] In order to make the technical problems, technical solutions, and advantageous effects to be solved by the present invention more clearly, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

Referring to FIG. 1, in a preferred embodiment of the present invention, a battery state monitoring system is used for monitoring a state of a battery used in powering a powered device and a current state of sudden change of a power device, that is, the battery 10 and the battery are used. Electrical installation In preparation, the battery 10 state monitoring system includes a sampling resistor Rsense sampling circuit 20, an analyzing unit 30, and a transmitting unit 40.

[0019] In this embodiment, referring to FIG. 2, the analyzing unit 30 includes a single-chip MCU, or further includes an analog-to-digital converter AD C, or further includes a memory chip ROM; and the transmitting unit 40 includes an RF antenna RF. The analyzing unit 30 and the transmitting unit 40 are integrated in the radio frequency module 100, and the radio frequency module 100 is integrated with the memory chip ROM. In other embodiments, the analysis unit 30, the transmitting unit 40, and the memory chip ROM respectively use independent settings. In addition, the memory chip ROM can also be integrated in the MCU of the microcontroller. Therefore, the specific implementation of the analysis unit 30, the transmission unit 40, and the memory chip ROM is not limited herein.

In this embodiment, in combination with FIG. 1 and FIG. 2, the first end of the sampling resistor Rsense is connected to the electrode of the battery 10, and the second end of the sampling resistor Rsense is connected to the charging and discharging interface 11. The sampling circuit 20 is connected to both ends of the sampling resistor Rsense, and samples the current flowing through the sampling resistor Rsense and processes the sampled data. The analyzing unit 30 is connected to the sampling circuit 20, the analyzing unit 30 receives the sampling data and analyzes, and the analyzing unit 30 receives the sampling data and compares the load abrupt state of the current powered device. More specifically, the current sampled data is compared with the historical sampled data to analyze the load abrupt state of the current powered device. The sending unit 40 is connected to the analyzing unit 30, receives the current load abrupt state and transmits it to the user terminal through the network. Specifically, the sampled data is voltage data and/or current data. The user terminal may include a cloud server 300, and may also include a mobile terminal 400, such as a mobile phone, a personal computer, or the like, connected to the cloud server 300.

[0021] In one embodiment, the analyzing unit 30 first determines whether the data is used for the first time by the powered device after receiving the sampled data; if yes, stores the current sampled data as historical sample data; otherwise, the current sampled data and the historical sample are collected. Data comparison analysis. That is, the memory chip ROM read by the analyzing unit 30 can determine whether the sample data is saved. If the sample data is not stored in the memory chip ROM, the device is judged to be used for the first time. The analyzing unit 30 can automatically store the current sampling data as historical sampling data.

[0022] In one embodiment, the system further includes a button 200 that is coupled to the analysis unit 30 to store or modify historical sample data via the button 200. That is, the sampled data can be manually stored and stored as historical sample data. When the user first uses the powered device, the user can use the short press button 200 to record the stabilized sampled data (such as the current scale). In addition, when the user needs to reset the current scale, the user can use the long press button 200 to clear the previously recorded sample data, and then re-record the sample data. [0023] In a specific embodiment, the sampling circuit 20 amplifies the voltage data (sampling data) and sends it to the MCU embedded in the radio frequency, and the ADC (analog-to-digital converter ADC) in the MCU of the MCU collects Voltage, analyze the input voltage size. The MCU of the MCU determines whether it is the first use of the user equipment. If the device is used for the first time, the voltage data used for the first time is saved to the ROM of the memory chip; if the device is not used for the first time, the voltage data is compared with the voltage data collected for the first time and then passed through the wireless. The network is transmitted to the cloud server 300, and the personal terminal is sent by the cloud server 300 to remind the user that the device load is in a state of sudden change, and the user and the user are invited to view.

[0024] In addition, it is also possible to determine the sudden change state of the load of the electric device by comparing and analyzing the magnitude of the current. Specifically, the current magnitude can be used stably to judge whether the load state of the load device and the working state of the device are normal. When the power device is used for the first time, the system reads the internal memory chip ROM to determine whether the current data is saved, if the memory chip ROM If there is no current data saved, then the device is judged to be used for the first time. If the device is not used for the first time, the current data is compared with the current data collected for the first time and then transmitted to the cloud server 300 through the wireless network. The cloud server 300 transmits the personal terminal to remind the user that the device load is in a state of abrupt change.

[0025] In a specific embodiment, the sampling circuit 20 collects current data through the sampling resistor Rsense, converts it into voltage data, and sends it to the amplifier for amplification processing, and then performs output and comparison processing. In this embodiment, the sampling circuit 20 includes a first comparator A1, a second comparator A2, a first bypass transistor Q1, and a second bypass transistor Q2.

[0026] The non-inverting input terminal of the first comparator A1 and the inverting input terminal of the second comparator A2 are sequentially connected to the first end of the sampling resistor Rse nse, the inverting input terminal of the first comparator A1 and the second comparator The non-inverting input terminal of A2 is sequentially connected to the second end of the sampling resistor Rsense; the output end of the first comparator is connected to the control end of the first switch Q1, and the output end of the second comparator A2 is connected to the second switch Q2. The control end, the input end of the first switch Q1 is connected to the first end of the sampling resistor Rsense, the input end of the second switch Q2 is connected to the second end of the sampling resistor Rsense, the first switch Q1 and the second switch The output of the tube Q2 is connected to the input of the analysis unit 30.

Further, the sampling circuit 20 further includes a first diode D1 and a second diode D2. The anode of the first diode D1 is connected to the output end of the first comparator A1, the cathode is connected to the control end of the first bypass transistor Q1; the anode of the second diode D2 is connected to the output end of the second comparator A2, and the cathode is connected The second is the control terminal of Q2.

[0028] wherein, when the input current is from the first end of the sampling resistor Rsense to the second end of the sampling resistor Rsense, The first switch Q1 is hiccup, and the first comparator A1 outputs a high level to the ADC input terminal of the analyzing unit 30, and the input current exhibits a voltage mode, and the battery 10 is in the load mode. When the input current is from the second end of the sampling resistor R sense to the first end of the sampling resistor Rsense, the second switch Q2 is hiccup, the second comparator A2 outputs the ADC input of the high level analyzing unit 30, the battery 10 is in charging mode and can be expressed as the charging current.

[0029] The system further includes an indication circuit 50 coupled to the sampling circuit 20 for indicating that the battery 10 is in a charged state or a discharged state. Preferably, the indicating circuit 50 includes a third comparator A3 and an indicator LED, one of the non-inverting input and the inverting input of the third comparator A3 is connected to the output of the first comparator, and the other is compared with the second At the output of the A2, the output of the third comparator A3 is connected to the indicator LED. When the input current is from the first end of the sampling resistor Rsense to the second end of the sampling resistor Rsense, the first comparator A1 outputs a high level, and the third comparator A3 outputs a level high, the 吋 is in the load mode, when the input current From the second end of the sampling resistor Rsense to the first end of the sampling resistor Rsense, the second switching transistor Q2 is hiccup, the second comparator A2 outputs a high level, and the third comparator A3 outputs a low level. Charging mode.

[0030] Preferably, the first bypass transistor Q1 and the second bypass transistor Q2 are NPN transistors, and the input terminal, the output terminal and the control terminal of the bypass transistor are respectively the collector, the emitter and the base of the NPN transistor. .

[0031] More specifically, the system further includes a voltage conversion circuit connected to the battery 10, and the voltage conversion circuit is an analysis unit 30, a transmitting unit 40, that is, a wireless radio frequency module 100, a single-chip MCU, an analog-to-digital converter ADC, and an RF Power supply such as antenna RF. The voltage conversion circuit can be a BUCK circuit or a Boost circuit.

Referring to FIG. 4, in a preferred embodiment, the battery condition monitoring system is built into the battery unit 30 including the battery 10. In this way, the battery state monitoring system is integrated in the battery device 30. When the battery device is used, no additional battery state monitoring device matching the battery 10 is required, which can save the R&D design process and expenses.

[0033] Specifically, in one embodiment, the sampling resistor Rsense. The sampling circuit 10 and the indicating circuit 50 are disposed on the first circuit board 62, and the first circuit board 62 is disposed at one end of the battery device 30, and the radio frequency The module 100 (including the analysis unit 30 and the transmitting unit 40) is disposed at the other end of the battery unit 30 with the battery 10 interposed therebetween. Reducing mutual interference between the circuit composed of discrete components and the radio frequency module also protects the internal battery 10. In other embodiments, the discrete components comprise circuitry and radio frequency Modules can be placed on opposite sides of the battery 10, respectively. In this embodiment, the first circuit board 62 is a PCB board.

[0034] In another embodiment, referring to FIG. 5 (A) and FIG. 5 (B), the sampling resistor Rsense, the sampling circuit 10 and the radio frequency module 100 are disposed on the second circuit board 64, the second The circuit board 64 is inserted into the battery device 30 and located on one side of the battery 10. In this embodiment, the second circuit board 64 is a PCB board.

[0035] In addition, in other embodiments, the battery state monitoring system may also be disposed outside the battery device 30. Referring to FIG. 6, the sampling resistor R _sense , the sampling circuit 10 , and the wireless RF module 64 are disposed on the third circuit. The third circuit board 66 is attached to the outside of the battery device 30 including the battery 10 by a backing. In this embodiment, the third circuit board 66 is a flexible circuit board, and may of course be a normal PCB board.

[0036] The battery 10 state monitoring system described above utilizes the sampling circuit 20 to perform the charging or discharging current of the sampling battery 10 electrode and amplifies the processing into sampling data, and compares the currently sampled sampling data with the pre-stored sampling data by the analyzing unit 30. Obtaining a comparison result that can confirm the sudden change state of the load of the user equipment, and sending the comparison result to the user terminal 400 through the network to notify the user that the battery 10 state supervision system has short sampling time and accurate sampling result, and can realize real monitoring and notification , efficient.

The above are only the preferred embodiments of the present invention, and are not intended to limit the present invention. Any modifications, equivalents, and improvements made within the spirit and scope of the present invention should be included in the present invention. Within the scope of protection.

Claims

Claim

A battery state monitoring system, wherein the battery is connected to the electrical device, and is characterized by:

a sampling resistor, the first end is connected to the electrode of the battery, the second end is connected to the charging and discharging interface; the sampling circuit is connected to both ends of the sampling resistor, and the current flowing through the sampling resistor is sampled and processed to obtain sampling data;

An analyzing unit, connected to the sampling circuit, receiving the sampling data and comparing and analyzing a load abrupt state of the current power device;

The sending unit is connected to the analyzing unit, receives the current load abrupt state and sends the status to the user terminal through the network.

The battery state monitoring system according to claim 1, wherein the analyzing unit receives the sampling data and compares and analyzes a load abrupt state of the current powered device, specifically: comparing current sampling data with historical sampling data to analyze current The sudden change in the load of the electrical equipment.

The battery state monitoring system according to claim 2, wherein the analyzing unit first determines whether the data is used for the first time by the powered device after receiving the sampling data; if yes, storing the current sampling data as a The historical sample data is described; otherwise, the current sample data is compared with the historical sample data for analysis.

A battery condition monitoring system according to claim 2, wherein said system further comprises a button, said button being coupled to said analyzing unit, said menu data being stored or altered by said button.

The battery condition monitoring system according to any one of claims 1 to 4, characterized in that the sampled data comprises voltage data and/or current data.

The battery state monitoring system according to any one of claims 1 to 4, wherein the sampling circuit comprises a first comparator, a second comparator, a first bypass tube and a second bypass tube, wherein:

a non-inverting input end of the first comparator and an inverting input end of the second comparator are sequentially connected to a first end of the sampling resistor, an inverting input end of the first comparator, and the second Than The positive phase input end of the comparator is sequentially connected to the second end of the sampling resistor;

An output end of the first comparator is connected to a control end of the first bypass tube, and an output end of the second comparator is connected to a control end of the second bypass tube, where the first The input end is connected to the first end of the sampling resistor, the input end of the second bypass tube is connected to the second end of the sampling resistor, and the output ends of the first bypass tube and the second bypass tube The peer is connected to the input of the analysis unit. The battery state monitoring system according to claim 6, wherein the sampling circuit further comprises:

a first diode, an anode connected to an output end of the first comparator, and a cathode connected to a control end of the first bypass tube;

a second diode, an anode connected to the output end of the second comparator, and a cathode connected to the control end of the second bypass tube.

A battery condition monitoring system according to claim 6, wherein said system further comprises an indication circuit, said indication circuit being coupled to said sampling circuit for indicating that said battery is in a charged state or a discharged state.

The battery state monitoring system according to claim 8, wherein said indication circuit comprises a third comparator and an indicator light, and one of a positive phase input terminal and an inverting input terminal of said third comparator The output of the first comparator is connected to the output of the second comparator, and the output of the third comparator is connected to the indicator.

The battery condition monitoring system according to claim 1, wherein the analysis unit and the transmitting unit are integrated in a radio frequency module, and the radio frequency module is integrated with a memory chip.

The battery condition monitoring system according to claim 1 or 10, wherein the analysis unit comprises a single chip microcomputer, and the transmitting unit comprises an RF antenna.

A battery condition monitoring system according to claim 10, wherein said battery state monitoring system is built in a battery unit including said battery.

A battery state monitoring system according to claim 12, wherein said sampling resistor And the sampling circuit is disposed on the first circuit board; and the first circuit board is disposed at one end of the battery device, the wireless radio frequency module is disposed at the other end of the battery device, and the battery is Separated.

The battery state monitoring system according to claim 12, wherein the sampling resistor, the sampling circuit and the radio frequency module are disposed on the second circuit board, and the second circuit board is inserted in the Inside the battery device, located on one side of the battery.

[Claim 15] The battery condition monitoring system according to claim 10, wherein the sampling resistor

The sampling circuit and the radio frequency module are disposed on the third circuit board, and the third circuit board is attached to the outside of the battery device including the battery.