CN210110978U

CN210110978U - Lithium battery device with NFC communication

Info

Publication number: CN210110978U
Application number: CN201921218342.5U
Authority: CN
Inventors: 翁亦红; 戴容勇; 李妹; 张凤敏; 刘斌生
Original assignee: Fujian Scud Power Technology Co Ltd
Current assignee: Fujian Scud Power Technology Co Ltd
Priority date: 2019-07-30
Filing date: 2019-07-30
Publication date: 2020-02-21
Anticipated expiration: 2029-07-30

Abstract

The utility model discloses a lithium battery device with NFC communication, including the battery package and use the main part of this battery package, battery package and main part are connected and provide the electric energy for it, including lithium cell unit, front end AFE unit, battery master control unit, NFC communication unit, current detection unit, I2C and three-terminal insurance unit; the main part includes contact point P + and P-, NFC communication unit and main part the control unit, the utility model discloses can accomplish communication task and OTA function through NFC, effectively solved traditional communication mode device and easily wet, soak and bring bad problem, have that the electromagnetism interference killing feature is strong, convenient to use, high advantage of security.

Description

Lithium battery device with NFC communication

Technical Field

The utility model relates to a lithium cell technical field, concretely relates to take lithium cell device of NFC communication.

Background

With the social development, the demand for lithium batteries is increasing. The lithium cell extensively applies to cell-phone, electric tool, motion body-building electronic product, unmanned aerial vehicle, car etc.. The capacity and the voltage of the lithium battery are also improved from small to large, so that the protection circuit of the lithium battery is abundant. Communication between the battery pack and the main body becomes more complicated and important, and also to meet the severe requirements of the external environment.

When the lithium battery works, various parameters such as temperature, voltage, current value and the like need to be transmitted to the main body of the electric product in time. Meanwhile, the control signal of the product main body is also used for downloading the battery pack. At present, wired connection methods such as 485 communication, I2C and UART communication are mostly adopted, and these communication methods are often affected by external environment and cause short circuit, which results in incapability of working, such as wetting, soaking, and the like. Meanwhile, high-voltage static electricity generated in the process of plugging and unplugging the wired connection damages port communication devices, and great potential safety hazards exist.

SUMMERY OF THE UTILITY MODEL

In order to solve the problem, the utility model provides a take lithium battery device of NFC communication is provided with NFC communication circuit, can accomplish communication task and OTA function through NFC, has effectively solved traditional communication mode device and has easily wet, the problem of bringing harmfully is soaked in water, has that the electromagnetism interference killing feature is strong, convenient to use, high advantage of security.

The utility model discloses a following technical scheme realizes: a lithium battery device with NFC communication comprises a battery pack and a main body applying the battery pack,

the battery pack is connected with the main body and provides electric energy for the main body, and comprises a lithium battery unit, a front end AFE unit, a battery main control unit, an NFC communication unit, a current detection unit, I2C and a three-terminal safety unit, wherein the lithium battery unit is used for supplying power to the whole device, the front end AFE unit is used for collecting the temperature and the voltage of the lithium battery unit and outputting the collected temperature and voltage to the battery main control unit, the current detection unit is used for detecting the output current of the lithium battery unit, the three-terminal safety unit is used for performing overload protection, and the NFC communication unit is used for communicating with the main body;

the main body comprises contact points P + and P-, an NFC communication unit and a main body main control unit, wherein the contact points P + and P-are used for being in contact with the positive electrode and the negative electrode of the battery pack and used as a passage for current circulation, the NFC communication unit is used for being communicated with the NFC communication unit of the battery pack, and the main body main control unit is used for controlling the working state of the main body.

Further, the battery pack is inserted into the body and connected to the contact points P + and P-.

Furthermore, the NFC communication units of the battery pack and the main body comprise antennas, the distance between the two antennas is less than or equal to 5cm during communication, and the surfaces of the two antennas are overlapped with parallel round points.

Further, the NFC communication unit of the main body includes an antenna circuit and a temperature compensation circuit, the antenna circuit includes an antenna designed on a PCB, R300, R301, C305, C307, C302, C309, C304, C308, L300, L301, C310, R300, and R30, and the temperature compensation circuit includes a capacitor C314, C315, C316, C317, C318, C319, C320, C321, a resistor R300, and R301.

Further, the NFC communication of the battery pack includes an antenna disposed in the PCB circuit, connected to

pins

2 and 3 of U40, resonating to a frequency of 13.8 to 14MHz with the U40 internal capacitance, and connected to C40, C43, or C45.

Further, the NFC communication unit of the main body is provided with a low power consumption circuit including a chip U100, a field effect transistor Q100, and a Q101.

Compared with the prior art, the beneficial effects of the utility model are that:

1. the utility model has the advantages of simple structure, convenient use, low cost and convenient maintenance;

2. the utility model is provided with the NFC communication unit, can conveniently and reliably complete the communication task and OTA function through NFC, and has the advantage of convenient use;

3. the utility model is provided with the NFC communication unit, effectively solves the problem that the wire communication port device is affected with damp and soaked to cause bad effect, simultaneously effectively improves the anti-interference ability of electromagnetism, and has the advantages of high safety and strong anti-interference ability;

4. the utility model discloses be provided with low-power consumption circuit, have low-power consumption, long service life's advantage.

Drawings

Fig. 1 is a schematic structural view of the present invention;

fig. 2 is a circuit diagram of an NFC communication unit of the main body portion;

FIG. 3 is an antenna circuit diagram of a battery pack;

fig. 4 is a circuit diagram of a low power consumption circuit.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

Referring to fig. 1 to 4, the present invention provides an embodiment: a lithium battery device with NFC communication comprises a battery pack and a main body applying the battery pack,

The battery pack is inserted into the body and connected to the contact points P + and P-.

The NFC communication unit of battery package and main part includes the antenna, and two antennas apart from being less than or equal to 5cm when communicating to the face is parallel dot coincidence relatively.

The NFC communication unit of the main body comprises an antenna circuit and a temperature compensation circuit, wherein the antenna circuit comprises an antenna, R300, R301, C305, C307, C302, C309, C304, C308, L300, L301, C310, R300 and R301 which are designed on a PCB, and the temperature compensation circuit comprises capacitors C314, C315, C316, C317, C318, C319, C320, C321, resistors R300 and R301.

The NFC communication of the battery pack comprises an antenna, the antenna is arranged in a PCB circuit and is connected with

pins

2 and 3 of U40, the antenna resonates to the frequency of 13.8-14 MHz with an internal capacitor of U40, and the antenna is connected with C40, C43 or C45.

The NFC communication unit of main part is provided with the low-power consumption circuit, including chip U100, field effect transistor Q100, Q101.

The working principle is as follows: as shown in fig. 1, the battery pack is inserted into the main body, and current is transmitted to the main body through the P +/P-connector and is butted with the main body through the P +/P-connector; communication between the battery pack and the main body is realized by NFC wireless communication, and the distance between the two antennas is less than or equal to 5 cm. After the antenna is inserted, the two antenna surfaces are opposite and the parallel round points are overlapped to obtain maximum signal coupling; the P +/P-two wires vertically pass through the middle part of the antenna, so that the signal coupling of the wires and the antenna is minimized, and the interference is reduced.

As shown in fig. 2, the carrier frequency is 13.56 MHz. The antenna of the NFC communication unit of the main body is designed from a PCB-layout, and the Q value of the antenna is adjusted by connecting R300/R301 in series; then, combining the C305/C307 capacitor and then serially connecting the C302/C309 capacitor for antenna impedance matching; then C304/C308 is connected, and then L300/L301 inductance is connected in series to improve EMC capacity; finally, the signal is connected to the transmitting end of the U200; C301/C310 is connected with R300/R301 and is sent to the receiving end of U200; the temperature compensation circuit is connected to the U200 from the R300/R301 from the C314 to the C321, and temperature compensation of antenna impedance matching is achieved.

As shown in fig. 3, the antenna circuit of the battery pack is designed from PCB-layout, and is directly connected to

pins

2 and 3 of U40, and the antenna resonates with the internal capacitance of U40 to a value between 13.8 Mhz and 14 Mhz; to achieve this value, adjustments may be made in conjunction with C40, or C43, or C45.

As shown in fig. 4, in order to reduce power consumption, a low power consumption circuit is designed, when no new data is transmitted in NFC, power supply to the NFC communication unit of the main body part is changed to a discontinuous mode, and U100 outputs 5.0V, V for DC-DC_RFSupplying to the NFC circuit; and a pin 1 of the U102 is connected to the Q101, and the Q100 is controlled to input voltage to the U100, so that the DC-DC converter is turned on and off.

It is obvious to a person skilled in the art that the invention is not restricted to details of the above-described exemplary embodiments, but that it can be implemented in other specific forms without departing from the spirit or essential characteristics of the invention. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.

Claims

1. A lithium battery device with NFC communication comprises a battery pack and a main body applying the battery pack, and is characterized in that,

2. The lithium battery device with NFC communication of claim 1, wherein: the battery pack is inserted into the body and connected to the contact points P + and P-.

3. The lithium battery device with NFC communication of claim 1, wherein: the NFC communication unit of battery package and main part includes the antenna, and two antennas apart from being less than or equal to 5cm when communicating to the face is parallel dot coincidence relatively.

4. The lithium battery device with NFC communication of claim 1, wherein: the NFC communication unit of the main body comprises an antenna circuit and a temperature compensation circuit, wherein the antenna circuit comprises an antenna, R300, R301, C305, C307, C302, C309, C304, C308, L300, L301, C310, R300 and R301 which are designed on a PCB, and the temperature compensation circuit comprises capacitors C314, C315, C316, C317, C318, C319, C320, C321, resistors R300 and R301.

5. The lithium battery device with NFC communication of claim 1, wherein: the NFC communication of the battery pack comprises an antenna, the antenna is arranged in a PCB circuit and is connected with pins 2 and 3 of U40, the antenna resonates to the frequency of 13.8-14 MHz with an internal capacitor of U40, and the antenna is connected with C40, C43 or C45.

6. The lithium battery device with NFC communication of claim 1, wherein: the NFC communication unit of main part is provided with the low-power consumption circuit, including chip U100, field effect transistor Q100, Q101.