CN211061663U - Lithium battery monitoring system - Google Patents

Abstract

The utility model discloses a lithium battery monitoring system, including the group battery, the voltage acquisition module of being connected with the group battery, host system, the current acquisition module of being connected with host system, the temperature acquisition module of being connected with host system, communication module and the display module of being connected with host system, voltage acquisition module is used for acquireing the voltage of group battery and sends to host system, current acquisition module is used for acquireing the electric current of group battery and sends to host system, temperature acquisition module is used for acquireing the temperature of group battery and sends to host system, host system is connected with communication module. The utility model discloses, temperature, electric current, the voltage to the lithium cell acquire to show more data of lithium cell through display module, reach the technological effect of comprehensive control and the technological effect of the control of being convenient for.

Description

Lithium battery monitoring system

technical field

The utility model belongs to the technical field of lithium batteries, in particular to a lithium battery monitoring system.

Background technique

At present, although lithium batteries are widely used, there are risks in specific use. For example, when the battery reaches a certain temperature due to a short circuit and other reasons and catches fire, and the battery space is sealed, it is easy to cause an explosion. The existing monitoring of batteries, such as patent applications No. CN201810405356, the application name is a battery temperature monitoring system, which can obtain the temperature of the battery, but in fact the battery temperature is too high is only the result, the monitoring system does not obtain the real-time status before the battery temperature is too high, and it is not comprehensive. Monitor the battery, the monitoring data is too single.

Therefore, the existing technology needs to be improved.

Utility model content

The main purpose of the present invention is to propose a lithium battery monitoring system, which aims to solve the technical problems mentioned in the background art, so as to obtain the temperature, current and voltage of the lithium battery, so as to update the lithium battery through the display module. Multiple data are displayed to achieve the technical effect of comprehensive monitoring and the technical effect of easy monitoring.

A lithium battery monitoring system of the utility model comprises a battery pack, a voltage acquisition module connected with the battery pack, a main control module, a current acquisition module connected with the main control module, a temperature acquisition module connected with the main control module, and a main control module. module, communication module and display module connected to the main control module, the voltage acquisition module is used to acquire the voltage of the battery pack and send it to the main control module, the current acquisition module is used to acquire the current of the battery pack and send it to the main control module, the temperature acquisition module The module is used to obtain the temperature of the battery pack and send it to the main control module, which is connected to the communication module.

Preferably, it also includes a monitoring terminal connected to the communication module, and the main control module sends the temperature, voltage and current to the monitoring terminal through the communication module.

Preferably, a total positive relay module and a total negative relay module are also included, and both the total positive relay module and the total negative relay module are connected to the main control module.

Preferably, the voltage acquisition module includes a seventeenth chip and an eighth chip, the second pin of the seventeenth chip is connected to the battery pack, the sixth pin of the seventeenth chip is connected to one end of the eighty-first resistor, and the eighty-first The other end of the resistor is connected to one end of the fifty-third capacitor, one end of the eighty-third resistor and the second pin of the eighth chip, the seventh pin of the seventeenth chip is connected to one end of the eighty resistor, and the other end of the eighty resistor It is connected to the third pin of the eighth chip, and the other end of the fifty-third capacitor is simultaneously connected to the other end of the eighty-third resistor, the first pin of the eighth chip and the main control module.

Preferably, the current acquisition module includes a twentieth chip, a twenty-second capacitor and a one-hundred-third resistor, the first pin and the second pin of the twentieth chip are both connected to the total positive relay module, and the twentieth chip has a Both the third pin and the fourth pin are connected to the second pin of the twentieth socket, and the first pin of the twentieth socket is simultaneously connected to one end of the first PTC heat recovery fuse and one end of the second PTC heat recovery fuse. The twentieth chip The seventh pin of the 20th resistor is connected to one end of the 103rd resistor, and the other end of the 103rd resistor is connected to the main control module.

Preferably, the temperature acquisition module includes a thirtieth chip and a forty-eighth resistor connected to the main control chip, the first pin of the thirtieth chip is grounded, and the second pin of the thirtieth chip is connected to one end of the forty-eighth resistor , the other end of the forty-eighth resistor is simultaneously connected to the third pin of the thirtieth chip and one end of the nineteenth capacitor, and the other end of the nineteenth capacitor is grounded.

Preferably, the total positive relay module includes a fourth switch assembly, a forty-fifth resistor, a sixty-third resistor and a second triode, the fourth switch assembly is connected to the collector of the second triode, and the second triode The base of the tube is connected to one end of the forty-fifth resistor and one end of the sixty-third resistor at the same time, the other end of the forty-fifth resistor is connected to the main control module, and the emitter of the second transistor is connected to the other end of the sixty-third resistor at the same time. One end is connected to ground.

Preferably, the battery pack includes lithium-ion batteries.

The lithium battery monitoring system of the utility model has the following beneficial effects: acquiring the temperature, current and voltage of the lithium battery, and displaying the above-mentioned relevant data of the lithium battery through the display module, so as to achieve the technical effect of comprehensive monitoring and the technology that facilitates monitoring. Effect.

Description of drawings

Fig. 1 is the principle block diagram of the utility model lithium battery monitoring system;

Fig. 2 is the circuit connection schematic diagram of the main control module in the lithium battery monitoring system of the present invention;

3 is a schematic diagram of the circuit connection of the voltage acquisition module in the lithium battery monitoring system of the present invention;

4 is a schematic diagram of the circuit connection of the current acquisition module in the lithium battery monitoring system of the present invention;

5 is a schematic diagram of the circuit connection of the temperature acquisition module in the lithium battery monitoring system of the present invention;

6 is a schematic diagram of the circuit connection of the display connection circuit in the lithium battery monitoring system of the present invention;

7 is a schematic diagram of circuit connection of a key module in the lithium battery monitoring system of the present invention;

8 is a schematic diagram of the circuit connection of the CAN bus module in the lithium battery monitoring system of the present invention;

Fig. 9 is the circuit connection schematic diagram of the communication module in the lithium battery monitoring system of the present invention;

10 is a schematic diagram of the circuit connection of the total positive relay module in the lithium battery monitoring system of the present invention;

11 is a schematic diagram of the circuit connection of the total negative relay module in the lithium battery monitoring system of the present invention;

12 is a schematic diagram of the circuit connection of the battery pack in the lithium battery monitoring system of the present invention;

13 is a schematic diagram of circuit connection of an alarm module in the lithium battery monitoring system of the present invention;

14 is a schematic diagram of the circuit connection of the heating module in the lithium battery monitoring system of the present invention;

15 is a schematic diagram of the circuit connection of the heat dissipation module in the lithium battery monitoring system of the present invention;

16 is a schematic diagram of the circuit connection of the fan module in the lithium battery monitoring system of the present invention.

The realization, functional characteristics and advantages of the purpose of the present utility model will be further described with reference to the accompanying drawings in conjunction with the embodiments.

Detailed ways

It should be understood that the specific embodiments described herein are only used to explain the present invention, and are not intended to limit the present invention. It should be noted that related terms such as "first", "second", etc. may be used to describe various components, but these terms do not limit the component. These terms are only used to distinguish one component from another. For example, a first component could be termed a second component, and a second component could similarly be termed a first component, without departing from the scope of the present invention. The term "and/or" refers to a combination of any one or more of the associated and described items.

Referring to FIG. 1 , FIG. 1 is a schematic block diagram of the lithium battery monitoring system of the present invention.

A lithium battery monitoring system of the present invention includes a battery pack 20, a voltage acquisition module 21 connected to the battery pack 20, a main control module 10, a current acquisition module 23 connected to the main control module 10, and a voltage acquisition module 23 connected to the main control module 10. The temperature acquisition module 22, the communication module 25 and the display module 24 connected to the main control module, the voltage acquisition module is used to acquire the voltage of the battery pack and send it to the main control module, and the current acquisition module is used to acquire the current of the battery pack and send it to the main control module. The temperature acquisition module is used to obtain the temperature of the battery pack and send it to the main control module, which is connected to the communication module. The lithium battery monitoring system of the utility model has the following beneficial effects: acquiring the temperature, current and voltage of the lithium battery, and displaying the above-mentioned relevant data of the lithium battery through the display module, so as to achieve the technical effect of comprehensive monitoring and the technology that facilitates monitoring. Effect. More specifically, it also includes a monitoring terminal connected to the communication module, the main control module sends the temperature, voltage and current to the monitoring terminal through the communication module, and the monitoring terminal includes a mobile phone, an IPAD or a computer.

The circuit connection diagram of the battery pack is shown in Figure 12; the circuit connection diagram of the main control module 10 is shown in Figure 2; the main control module includes the first main control chip P9, the specific model is MC9S12DG128BMPV. As shown in Figure 3, the voltage acquisition module includes a seventeenth chip P17 and an eighth chip U8, the second pin VIN of the seventeenth chip is connected to the battery pack, and the sixth pin VOUT- of the seventeenth chip is connected to the eighty-first One end of the resistor R81 is connected, the other end of the eighty-first resistor is connected to one end of the fifty-third capacitor C53, one end of the eighty-third resistor R83 and the second pin -INA of the eighth chip, and the seventh pin of the seventeenth chip VOUT+ It is connected to one end of the 80th resistor R80, the other end of the 80th resistor R80 is connected to one end of the 52nd capacitor C52, one end of the 82nd resistor R82 is connected to the third pin +INA of the eighth chip, and the other end of the 53rd capacitor is connected. One end is connected to the other end of the eighty-third resistor, the first pin OUTA of the eighth chip and the main control module at the same time; the specific model of the seventeenth chip is ACPL-C87; the specific model of the eighth chip U8 is OPA2379. In this preferred real-time example, the specific structure of the voltage acquisition module is limited, so as to realize the function of acquiring the voltage of the battery pack. That is, a sampling resistor with a low PPM value is selected for voltage division sampling. The acquisition voltage is more accurate, the circuit is simple, and the cost is lower. After processing by the photoelectric isolation chip and the op amp chip, the single-chip microcomputer that is not in the same power system can collect and process the signal, so as to achieve power isolation and detection of the power supply voltage that does not belong to the same system.

In the above embodiment, as shown in FIG. 3 , the voltage acquisition module further includes an eighteenth chip P18, a ninth chip U9, an eleventh chip P11, an eighty-fifth resistor R85 and an eighty-sixth resistor R86, and the tenth The second pin VIN of the eighth chip P18 is connected to the battery pack, the seventh pin VOUT+ of the eighteenth chip P18 is connected to one end of the eighty-fifth resistor R85, and the other end of the eighty-fifth resistor R85 is connected to the fifth pin of the eighth chip U8 +INB connection; the sixth pin VOUT- of the eighteenth chip P18 is connected to one end of the eighty-sixth resistor R86, and the other end of the eighty-sixth resistor R86 is connected to the sixth pin -INB of the eighth chip; the eleventh chip P11 The seventh pin VOUT+ is connected to one end of the ninety-sixth resistor R96, the other end of the ninety-sixth resistor R96 is connected to the third pin +INA of the ninth chip U9, and the sixth pin VOUT- of the eleventh chip P11 is connected to the ninth One end of the seventeenth resistor R97 is connected, and the other end of the nineteenth resistor R97 is connected to the second pin -INA of the ninth chip U9. This preferred embodiment further defines the circuit structure of the voltage acquisition module, so as to be able to collect the voltage of the battery pack when the battery pack has three cells, instead of being limited to one cell.

As shown in FIG. 4, preferably, the current acquisition module includes the twentieth chip ACS1, the twenty-second capacitor C22 and the one-hundred and third resistor R103, and the first pin IP+ and the second pin IP+ of the twentieth chip are both connected to The total positive relay module is connected, the third pin IP- and the fourth pin IP- of the twentieth chip are connected to the second pin of the twentieth socket U21, and the first pin of the twentieth socket is thermally restored with the first PTC at the same time One end of the fuse FUSE_1 is connected to one end of the second PTC thermal recovery fuse PTC2, the seventh pin OUT of the twentieth chip is connected to one end of the one hundred and third resistor R103 through the twentieth resistor R20, and the other end of the one hundred and third resistor R103 is connected to Main control module connection. In this preferred embodiment, a specific circuit is defined for the current acquisition module, so as to realize the current acquisition of the battery pack. The chip ACS1 (ACS712ELCTR-20A-T) is a current Hall sensor. The chip is connected in series in the battery pack. The chip linearly follows the current size and voltage, and outputs it to the main control module through pin 7. Main advantages: wide measurement range, high bandwidth, low noise, safe isolation voltage of 2100V from wire pins to signal pins, low power consumption, low error, low internal resistance of the power conduction channel (1.2 milliohms).

As shown in FIG. 5 , the temperature acquisition module includes a thirtieth chip P1 and a forty-eighth resistor R48 connected to the main control chip, the first pin of the thirtieth chip is grounded, and the second pin of the thirtieth chip is connected to the fourth One end of the eighteenth resistor is connected, the other end of the forty-eighth resistor is connected to the third pin of the thirtieth chip and one end of the nineteenth capacitor at the same time, and the other end of the nineteenth capacitor C19 is grounded; this preferred embodiment is specific for the temperature acquisition module. It is limited to realize the temperature acquisition function for the battery pack. It can be seen from Figure 5 that the temperature acquisition module includes four temperature acquisition units, and the above circuit is described as one of the temperature acquisition units; the specific model of the thirtieth chip P1 is DS18B20; the four acquisition units constitute the 18650 battery pack temperature detection the complete module. A single DS18650U temperature sensor sits between two 18650 batteries. Therefore, six temperature sensors do not need to be used. Beneficial effects: while reducing the cost, it can also take into account the detection temperature of all single-cell batteries, and at the same time, it is hidden under the battery in the form of a patch, which can reduce the deviation of temperature collection - heat attenuation.

As shown in FIG. 6, FIG. 6 is a schematic diagram of the circuit connection of the display connection circuit in the lithium battery monitoring system of the present invention; preferably, it also includes a display connection circuit, and the display connection circuit includes a socket P12; in order to realize the connection between the display module and the socket P12, Then the display module can display the voltage, current and temperature obtained from the main control module. As shown in FIG. 7 , FIG. 7 is a schematic diagram of circuit connection of a button module in the lithium battery monitoring system of the present invention; it also includes a button module to provide user input functions and realize human-computer interaction experience. As shown in Figure 8, a CAN module is also included. As shown in Figure 9, Figure 9 is a schematic diagram of the circuit connection of the communication module in the lithium battery monitoring system of the present invention. The communication module is a MAX232 communication serial port, which can transmit the voltage, current and temperature monitored by the lithium battery to the upper position through the bus. machine or other system.

As shown in Figure 10 and Figure 11, Figure 10 is a schematic diagram of the circuit connection of the total positive relay module in the lithium battery monitoring system of the present invention; Figure 11 is a schematic diagram of the circuit connection of the total negative relay module in the lithium battery monitoring system of the present invention; The ground also includes a total positive relay module and a total negative relay module, both of which are connected to the main control module. Preferably, the total positive relay module includes a fourth switch assembly, a forty-fifth resistor R45, a sixty-third resistor R63 and a second triode Q2, the fourth switch assembly is connected to the collector of the second triode, and the first The base of the second triode is connected to one end of the forty-fifth resistor and one end of the sixty-third resistor at the same time, the other end of the forty-fifth resistor is connected to the main control module, and the emitter of the second triode is simultaneously connected to the sixty-third resistor. The other end of the three resistors is connected to ground; the fourth switch assembly includes a fourth switch K4 and a second diode D2; the specific circuit of the total negative relay module is shown in Figure 11; in this preferred embodiment, based on the total positive relay module and Total Negative Relay Module,

As shown in Figure 13, Figure 14, Figure 15, Figure 16, Figure 13 is a schematic diagram of the circuit connection of the alarm module in the lithium battery monitoring system of the present invention; Figure 14 is a schematic diagram of the circuit connection of the heating module in the lithium battery monitoring system of the present invention. 15 is a schematic diagram of the circuit connection of the cooling module in the lithium battery monitoring system of the present invention; FIG. 16 is a schematic diagram of the circuit connection of the fan module in the lithium battery monitoring system of the present invention. Also includes alarm modules, heating modules, cooling modules, and fan modules. In order to enable the user to control the heating module, cooling module and fan module to heat or dissipate the battery through the button module, based on the setting of the alarm module, when the battery temperature exceeds a certain threshold, the alarm function is activated and then the heat dissipation is performed to cancel the alarm module buzzer; especially Battery management simulation for the laboratory.

The above are only the preferred embodiments of the present utility model, and are not intended to limit the scope of the present utility model patent. Any equivalent structure or equivalent process transformation made by using the contents of the present utility model description and accompanying drawings, or directly or indirectly applied to other related The technical field of the present invention is similarly included in the scope of patent protection of the present invention.

Claims (8)

1. a lithium battery monitoring system, is characterized in that, comprises battery pack, voltage acquisition module connected with battery pack, main control module, current acquisition module connected with main control module, temperature acquisition module connected with main control module, The main control module, the communication module and the display module connected with the main control module, the voltage acquisition module is used to acquire the voltage of the battery pack and send it to the main control module, the current acquisition module is used to acquire the current of the battery pack and send it to the main control module, The temperature acquisition module is used to acquire the temperature of the battery pack and send it to the main control module, which is connected to the communication module. 2 . The lithium battery monitoring system according to claim 1 , further comprising a monitoring terminal connected with the communication module, and the main control module sends the temperature, voltage and current to the monitoring terminal through the communication module. 3 . 3 . The lithium battery monitoring system according to claim 1 , further comprising a total positive relay module and a total negative relay module, both of which are connected to the main control module. 4 . 4. The lithium battery monitoring system according to claim 1, wherein the voltage acquisition module comprises a seventeenth chip and an eighth chip, the second pin of the seventeenth chip is connected to the battery pack, and the sixth pin of the seventeenth chip is connected to the battery pack. The pin is connected to one end of the eighty-first resistor, the other end of the eighty-first resistor is connected to one end of the fifty-third capacitor, one end of the eighty-third resistor and the second pin of the eighth chip, and the seventh pin of the seventeenth chip. It is connected to one end of the 80th resistor, the other end of the 80th resistor is connected to the third pin of the eighth chip, and the other end of the fifty-third capacitor is connected to the other end of the 83rd resistor, the first pin of the eighth chip and the main control module connection. 5. The lithium battery monitoring system according to claim 3, wherein the current acquisition module comprises a twentieth chip, a twenty-second capacitor and a one-hundred-third resistor, and the first pin of the twentieth chip and the second The pins are all connected to the total positive relay module, the third and fourth pins of the twentieth chip are both connected to the second pin of the twentieth socket, and the first pin of the twentieth socket is simultaneously connected to one end of the first PTC thermal recovery fuse One end of the second PTC thermal recovery fuse is connected, the seventh pin of the twentieth chip is connected to one end of the one hundred and third resistor through the twentieth resistor, and the other end of the one hundred and third resistor is connected to the main control module. 6. The lithium battery monitoring system according to claim 1, wherein the temperature acquisition module comprises a thirtieth chip and a forty-eighth resistor connected to the main control chip, the first pin of the thirtieth chip is grounded, and the third The second pin of the tenth chip is connected to one end of the forty-eighth resistor, the other end of the forty-eighth resistor is simultaneously connected to the third pin of the thirtieth chip and one end of the nineteenth capacitor, and the other end of the nineteenth capacitor is grounded. 7. The lithium battery monitoring system according to claim 3, wherein the total positive relay module comprises a fourth switch assembly, a forty-fifth resistor, a sixty-third resistor and a second transistor, and the fourth switch assembly is connected to The collector of the second triode is connected, the base of the second triode is connected to one end of the forty-fifth resistor and one end of the sixty-third resistor at the same time, the other end of the forty-fifth resistor is connected to the main control module, and the second The emitter of the triode is connected to the other end of the sixty-third resistor and the ground at the same time. 8. The lithium battery monitoring system of claim 1, wherein the battery pack comprises a lithium ion battery.

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