Battery protection board

Abstract

The utility model relates to a battery protection board which is arranged on a battery and comprises an equipment end interface, an MCU (Microprogrammed Control Unit), a battery cell interface and a memory for storing battery authentication information, the equipment end interface is connected with the cell interface and the MCU; the MCU receives and identifies the authentication instruction through the device end interface, reads the battery authentication information in the memory, and transmits the battery authentication information to the electronic device from the device end interface; and the electricity meter module is respectively connected with the equipment end interface, the electric core interface and the MCU, and is used for metering the electric quantity transmitted between the equipment end interface and the electric core interface under the control of the MCU. According to the utility model, on the protection board of the battery, the voltameter module is adopted to accumulate the charging and discharging of the battery, so that the residual electric quantity can be accurately known.

Description

Technical Field

[0001] The utility model relates to the field of battery protection, in particular to a battery protection plate. Background Art

[0002] Portable electronic devices such as smartphones, laptops, and portable game consoles operate by drawing power from battery packs and other battery devices installed in these devices. In these electronic devices, counterfeit battery devices sometimes circulate alongside genuine battery devices. While inexpensive, counterfeit battery devices are less safe and reliable than genuine products, and therefore their use in electronic devices should be avoided. Battery authentication systems are implemented in electronic devices that incorporate batteries to prevent the use of counterfeit batteries and prevent accidents caused by counterfeit batteries.

[0003] Currently, the battery authentication method mainly consists of the following two steps:

[0004] When the electronic device is turned on, an authentication instruction is sent to the battery;

[0005] The battery replies with authentication information;

[0006] The electronic device determines whether the authentication information is correct. If it is correct, it continues to be used; otherwise, it is immediately shut down or the function usage is restricted.

[0007] Currently, a battery authentication system for electronic devices generally includes an information transmission unit disposed at the battery terminal and an information authentication unit installed on the electronic device, thereby enabling information to be transmitted and identified between the battery and the electronic device to perform a battery authentication process.

[0008] Electronic devices using the above authentication method and authentication system can avoid the use of non-standard batteries and prevent the risk of accidents caused by non-standard batteries.

[0009] In order to complete battery authentication, a battery protection board is provided on the battery. The battery protection board has a microprocessor and a battery authentication module. When the electronic device equipped with the battery is started, a battery authentication instruction is sent to the battery protection board in the battery. On the battery protection board, the microprocessor reads the battery authentication information in the battery authentication module and sends it to the electronic device. The electronic device completes the battery information comparison to realize battery information authentication.

[0010] At present, when electronic devices use the batteries they carry, they also need to have a fear of understanding the remaining capacity of the batteries to avoid being forced to shut down when the batteries are exhausted, causing losses. In fact, if the battery is exhausted and not recharged immediately, it will also affect the battery life. Therefore, it is necessary to have an understanding of the remaining capacity of the battery. At present, the remaining capacity is generally estimated by detecting the battery output voltage. This method does not estimate the remaining capacity of the battery with high accuracy. Utility Model Content

[0011] The utility model aims to provide a battery protection board, in which a fuel meter module is arranged to measure the charge and discharge amount of the battery and accumulate the accurate remaining capacity of the battery.

[0012] The technical solution of the utility model is: a battery protection board, which is arranged on the battery, includes a device-side interface, an MCU, a battery cell interface, and a memory storing battery authentication information; the device-side interface is connected to the battery cell interface and the MCU; the MCU receives and identifies the authentication instruction through the device-side interface, reads the battery authentication information in the memory, and transmits it from the device-side interface to the electronic device; and also includes a power meter module, which is respectively connected to the device-side interface, the battery cell interface and the MCU, and measures the power transmitted between the device-side interface and the battery cell interface under the control of the MCU.

[0013] Furthermore, in the above-mentioned battery protection board: the fuel gauge module includes a battery fuel gauge chip U1, a sampling circuit, and a sampling resistor R11. The sampling resistor R11 is arranged on the negative electrode connection line between the battery cell interface and the device-end interface battery cell.

[0014] Furthermore, in the above-mentioned battery protection board: the sampling circuit includes a resistor R12 and a resistor R13, and the two sides of the sampling resistor R11 are connected to the two metering signal input terminals of the battery fuel meter chip U1 through the resistor R12 and the resistor R13 respectively. A capacitor C5 is connected across the two metering signal input terminals of the battery fuel meter chip U1 and is grounded through capacitors C6 and C7 respectively.

[0015] Furthermore, the above-mentioned battery protection board also includes a wireless communication module, which communicates with an external authentication device through the wireless communication module under the control of the MCU to obtain correct battery authentication information.

[0016] Furthermore, in the above-mentioned battery protection board: the wireless communication module adopts Bluetooth communication mode, adopts RFSoC radio frequency signal transceiver chip U1, and also includes inductor L1, inductor L3, and capacitor C3 between the radio frequency port (RF) of RFSoC radio frequency signal transceiver chip U1 and the antenna (ANT1); one end of inductor L1 and inductor L3 is connected to the radio frequency port (RF) of RFSoC radio frequency signal transceiver chip U1, and the other end is connected to the antenna (ANT1) and the ground respectively; capacitor C3 is connected between the antenna (ANT1) and the ground.

[0017] In the utility model, a power meter module is used on the protection board of the battery to accumulate the charge and discharge of the battery, so that the remaining power can be accurately known.

[0018] The present invention will be described in detail below with reference to the accompanying drawings and specific embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is the principle block diagram of the battery protection board of this utility model;

[0020] Figure 2 This is a circuit diagram of an electric meter module according to an embodiment of the present utility model;

[0021] Figure 3 This is a connection diagram of the RFSoC radio frequency signal transceiver chip in an embodiment of the present utility model. DETAILED DESCRIPTION

[0022] This embodiment is a protection board on a lithium battery. Of course, the battery can also be other secondary batteries. For safety reasons, electronic devices equipped with such secondary batteries need to authenticate the battery when starting the device. Only batteries that meet their own safety requirements can continue to be used. In order to cooperate with the electronic device to authenticate the battery information, a battery protection board is set in the battery shell. The battery protection is installed in the battery shell together with the battery cell. In this embodiment, the battery protection board includes a device end interface 5, a battery cell interface 6, an MCU1, and a memory 7 for storing battery authentication information. Figure 1 As shown, the device-side interface 5 includes a power interface and a communication interface between the battery and the electronic device; the cell interface 6 is the interface between the protection board and the cell. By connecting the cell interface and the device-side interface 5, the battery can be used to supply power to the electronic device equipped with the battery. The MCU1 receives and identifies the authentication instruction through the device-side interface 5, reads the battery authentication information in the memory 7, and transmits it from the device-side interface 5 to the electronic device. Under normal circumstances, when the battery is installed in the electronic device, when the electronic device is started, the device-side interface 5 connects the cell output end to the electronic device to power the electronic device. At the same time, when the electronic device is just started, the electronic device will authenticate the battery, that is, send an authentication instruction to the battery through the device-side interface 5. The MCU1 receives the authentication instruction from the device-side interface 5 and reads the battery authentication information recorded in the memory 7. After that, it is transmitted from the device-side interface 5 to the electronic device equipped with the battery of this embodiment. The electronic device compares the signal received from the device-side interface 5 with the battery authentication information stored in the electronic device to determine whether it can be used. However, for some batteries, they are inherently safe and meet the requirements of powering electronic devices. In this embodiment, a wireless communication module 3 is further included, which communicates with an external authentication device through the wireless communication module 3 under the control of the MCU1 to obtain correct battery authentication information.

[0023] In this embodiment, the wireless communication module 3 adopts Bluetooth communication mode and adopts RFSoC radio frequency signal transceiver chip U1. Inductor L1, inductor L3 and capacitor C3 are also included between the radio frequency port RF of RFSoC radio frequency signal transceiver chip U1 and antenna ANT1. One end of inductor L1 and inductor L3 are connected to the radio frequency port RF of RFSoC radio frequency signal transceiver chip U1, and the other end is connected to antenna ANT1 and ground respectively. Capacitor C3 is connected between antenna ANT1 and ground. It also includes an anti-static circuit, which is set between antenna ANT1 and ground in practice. Figure 3 As shown, a bidirectional regulator ESD9 is used to ground the transient high voltage. In practice, the antenna ANT1 can be a Bluetooth antenna, or a ZIGBEE or other wireless communication module.

[0024] In this embodiment, a device-side interface 5, a battery cell interface 6, an MCU1, a memory 7 and a wireless communication module 3 are provided on the protection board. The circuit board of the protection board is provided in the battery shell. The battery cell interface 6 on the protection board is connected to the device-side interface 5 to realize the power transmission between the battery cell and the electronic device. When the battery authentication information stored in the memory 7 is inconsistent with the battery authentication information stored in the electronic device, the electronic device is shut down. At this time, if wireless communication is used to ask for help from other devices. In this embodiment, the wireless communication method adopted by the wireless communication module 3 includes Bluetooth wireless communication or ZIGBEE wireless communication, WIFI, NFC. When it is Bluetooth wireless communication, such as Figure 3 As shown, Bluetooth wireless communication can be used to communicate with smart terminals such as mobile phones. After a battery inspection, it is determined that the battery itself is safe and can power electronic devices. Therefore, authentication information for comparison with the electronic device is stored in the mobile phone in advance. Upon receiving the authentication request, the battery authentication information is immediately sent to the battery authentication device in this embodiment. In this embodiment, antenna 4 is used to receive this electronic information. After receiving the authentication information, the battery authentication device forwards the battery authentication information to the electronic device via device-side interface 5. In other embodiments, under the control of MCU1, the battery authentication information received via the Bluetooth antenna is written to the memory. When it is used again in the future, the battery authentication can be performed according to the previous requirements.

[0025] In this embodiment, the circuit board also includes an electricity meter module 2, which is connected to the device-side interface 5, the battery cell interface 6 and the MCU1 respectively, and measures the electricity transmitted between the device-side interface 5 and the battery cell interface 6 under the control of the MCU1.

[0026] The circuit diagram of the fuel gauge module 3 is as follows Figure 2As shown, the fuel gauge module 3 includes a battery fuel gauge chip U1, a sampling circuit, and a sampling resistor R11. The sampling resistor R11 is arranged on the negative electrode connection line between the battery cell interface (6) and the device end interface (5). The sampling circuit includes a resistor R12 and a resistor R13. The two sides of the sampling resistor R11 are connected to the two metering signal input terminals of the battery fuel gauge chip U1 through the resistors R12 and R13, respectively. A capacitor C5 is connected across the two metering signal input terminals of the battery fuel gauge chip U1, and is grounded through capacitors C6 and C7, respectively.

[0027] In some other embodiments, the communication method used by the wireless communication module may be NFC, which uses an NFC antenna to communicate with an NFC terminal. The NFC terminal communicates with the battery protection board in the battery through an NFC wireless communication device, thereby enabling battery information to be upgraded and updated.

Claims

1. A battery protection board, arranged on a battery, comprising a device-side interface (5), an MCU (1), a battery cell interface (6), and a memory (7) storing battery authentication information; the device-side interface (5) is connected to the battery cell interface (6) and the MCU (1); the MCU (1) receives and identifies an authentication instruction through the device-side interface (5), reads the battery authentication information in the memory (7), and transmits it from the device-side interface (5) to the electronic device; characterized in that: The device further comprises an electric quantity meter module (2), wherein the electric quantity meter module (2) is connected to the device-side interface (5), the battery cell interface (6) and the MCU (1) respectively, and measures the electric quantity transmitted between the device-side interface (5) and the battery cell interface (6) under the control of the MCU (1).

2. The battery protection board according to claim 1, characterized in that: The power meter module (2) includes a battery power monitoring chip U1, a sampling circuit, and a sampling resistor R11. The sampling resistor R11 is arranged on the negative electrode connection line between the battery cell interface (6) and the device end interface (5).

3. The battery protection board according to claim 2, characterized in that: The sampling circuit includes resistors R12 and R13. The two sides of the sampling resistor R11 are connected to the two metering signal input terminals of the battery fuel gauge chip U1 through resistors R12 and R13 respectively. A capacitor C5 is connected across the two metering signal input terminals of the battery fuel gauge chip U1 and is grounded through capacitors C6 and C7 respectively.

4. The battery protection board according to claim 1, characterized in that: It also includes a wireless communication module (3) which communicates with an external authentication device through the wireless communication module (3) under the control of the MCU (1) to obtain correct battery authentication information.

5. The battery protection board according to claim 4, characterized in that: The wireless communication module (3) adopts a Bluetooth communication mode and adopts an RFSoC radio frequency signal transceiver chip U1. An inductor L1, an inductor L3, and a capacitor C3 are also provided between the radio frequency port (RF) of the RFSoC radio frequency signal transceiver chip U1 and the antenna (ANT1); one end of the inductor L1 and the inductor L3 are connected to the radio frequency port (RF) of the RFSoC radio frequency signal transceiver chip U1, and the other end are connected to the antenna (ANT1) and the ground respectively; the capacitor C3 is connected between the antenna (ANT1) and the ground.

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