A battery pack, power control architecture and electronic equipment

Abstract

The technical solution of the present invention provides a battery pack, a power control architecture and an electronic device, wherein the battery pack includes: a temperature detection resistor, a battery cell and an encryption authentication chip; the first end of the temperature detection resistor is connected to the temperature detection pin of the encryption authentication chip; the encryption authentication chip, the communication pin of the encryption authentication chip is connected to the communication temperature detection contact of the battery pack, and the encryption authentication chip includes: a logic control unit, an encryption authentication unit and a first switch unit; the logic control unit controls the conduction of the first switch unit, connects the communication pin and the temperature detection pin, and outputs the analog voltage on the temperature detection resistor through the communication temperature detection contact; the logic control unit also controls the shutdown of the first switch unit, and according to the input encryption authentication signal, the first electronic tag information and the first encryption calibration signal stored in the encryption authentication unit are also output through the communication temperature detection contact, thereby realizing the multiplexing of the communication temperature detection contact.

Description

Technical Field

[0001] The present invention relates to the field of batteries, and in particular to a battery pack, a power control architecture, and an electronic device. Background Art

[0002] With the progress of society and the development of science and technology, various electronic products have emerged, which has also brought about various environmental problems. For example, in recent years, the European Union has introduced a new battery law requiring manufacturers and importers to recycle them. This has also triggered more electronic products to add circuits or chips with battery label information functions in their battery packs.

[0003] In addition to electronic tag authentication, battery packs also need to output a temperature resistance signal from an internal NTC resistor and detect the battery pack temperature using the analog voltage of the NTC resistor. However, existing battery packs that support both electronic tag and temperature resistance signal outputs require separate single-wire communication contacts and temperature detection contacts, increasing the physical space and packaging costs of the battery pack.

[0004] Therefore, providing a battery pack that can reuse single-line communication contacts and temperature detection contacts has become a technical problem that the industry urgently needs to solve. Summary of the Invention

[0005] The technical problem solved by the present invention is to provide a battery pack, a power control architecture and an electronic device, which solves the problem of too many contacts in the battery pack.

[0006] To solve the above technical problems, an embodiment of the present invention provides a battery pack, comprising: a temperature detection resistor, a battery cell, and an encryption authentication chip;

[0007] The first end of the temperature detection resistor is connected to the temperature detection pin of the encryption authentication chip, the second end of the temperature detection resistor is connected to the negative electrode of the battery cell, and the positive electrode of the battery cell is connected to the positive electrode contact of the battery pack;

[0008] An encryption authentication chip, wherein the communication pin of the encryption authentication chip is connected to the communication temperature detection contact of the battery pack, and the encryption authentication chip includes: a bidirectional single-line communication unit, a unidirectional single-line communication unit, a logic control unit, an encryption authentication unit, and a first switch unit;

[0009] A first end of the first switch unit is connected to the communication pin, and a second end of the first switch unit is connected to the temperature detection pin. The first switch unit is used to control the connection or isolation between the communication pin and the temperature detection pin according to whether the first switch unit is turned on or off;

[0010] The bidirectional single-line communication unit is used to perform bidirectional single-line communication with an external system processor through the communication pin on the chip when the first switch unit is turned off;

[0011] The unidirectional single-line communication unit is used to perform unidirectional single-line communication with an external system processor through the communication pin on the chip when the first switch unit is turned on;

[0012] The logic control unit is used to control the first switch unit to be turned on or off according to an external control signal, and the logic control unit is further used to output a first extraction signal and a second extraction signal according to an external encrypted authentication signal, wherein the encrypted authentication signal is input by an external system processor through the bidirectional single-line communication unit;

[0013] An encryption authentication unit, the encryption authentication unit is used to output a first electronic tag signal based on the first extraction signal, and the encryption authentication unit is also used to output a first encrypted calibration signal based on the second extraction signal. The first electronic tag signal and the first encrypted calibration signal are both output to the outside by the bidirectional single-line communication unit through the communication pin.

[0014] Optionally, the bidirectional single-line communication unit includes: a pull-up resistor, a first interface MOS tube, a second switch unit, and a first buffer;

[0015] A first end of the second switch unit is connected to the power supply pin of the encryption authentication chip, and a second end of the second switch unit is connected to the first end of the pull-up resistor; the second end of the pull-up resistor, the input end of the first buffer, and the drain of the first interface MOS transistor are all connected to the communication pin of the encryption authentication chip, the source of the first interface MOS transistor is connected to the ground pin of the encryption authentication chip, and the gate of the first interface MOS transistor is connected to the output end of the logic control unit; the output end of the first buffer is connected to the first input end of the logic control unit;

[0016] The logic control unit is further configured to control the second switch unit to be turned off when the first switch unit is controlled to be turned on, and the logic control unit is further configured to control the second switch unit to be turned on when the first switch unit is controlled to be turned off;

[0017] The power supply pin of the encryption authentication chip is connected to the positive electrode of the battery cell.

[0018] Optionally, the unidirectional single-line communication unit includes a second buffer, an input end of the second buffer is connected to the second end of the first switch unit, and an output end of the second buffer is connected to the second input end of the logic control unit.

[0019] Optionally, the encryption authentication chip also includes a detection current source unit, which is respectively connected to the temperature detection pin of the encryption authentication chip and the third input terminal of the logic control unit. The detection current source unit is used to output a first current to the temperature detection resistor through the temperature detection pin of the encryption authentication chip when the first switch unit is turned off. The detection current source unit is also used to convert the analog voltage at the temperature detection pin into a first digital signal when the first current flows through the temperature detection resistor. The first digital signal is output to the outside by the bidirectional single-line communication unit through the communication pin.

[0020] Optionally, the detection current source unit includes: a first current source and an analog-to-digital converter, the first current source is used to output the first current, and the analog-to-digital converter is used to convert the analog voltage at the temperature detection pin into a first digital signal.

[0021] Optionally, the logic control unit is further configured to output an interrupt alarm signal when the first digital signal exceeds a first range, and the interrupt alarm signal is output externally by the bidirectional single-line communication unit through the communication pin.

[0022] Optionally, the battery pack further includes: a battery protection unit, wherein the first end of the battery protection unit is connected to the positive electrode of the battery cell, the second end of the battery protection unit is connected to the negative electrode of the battery cell, and the third end of the battery protection unit is connected to the negative electrode contact of the battery pack, and the battery protection unit is used to cut off the connection between the negative electrode of the battery cell and the negative electrode contact of the battery pack when the voltage of the battery cell is lower than a first threshold value.

[0023] Optionally, the battery protection unit includes a battery protection chip, a first protection NMOS tube, a second protection NMOS tube, a first resistor and a second resistor; the power supply pin of the battery protection chip is connected to the second end of the first resistor, the first end of the first resistor serves as the first end of the battery protection unit, the ground pin of the battery protection chip serves as the second end of the battery protection unit, the input pin of the battery protection chip is connected to the second end of the second resistor, the first end of the second resistor serves as the third end of the battery protection unit, the first control pin of the battery protection chip is connected to the gate of the first protection NMOS tube, the second control pin of the battery protection chip is connected to the gate of the second protection NMOS tube, the source of the first protection NMOS tube is connected to the ground pin of the battery protection chip, the drain of the first protection NMOS tube is connected to the drain of the second protection NMOS tube, and the source of the second protection NMOS tube is connected to the first end of the second resistor.

[0024] Correspondingly, the technical solution of the present invention further provides a power control architecture, comprising: a system control mainboard and the battery pack;

[0025] The system control motherboard includes: a system processor and a power management chip. The input and output pins of the system processor are connected to the communication temperature detection contacts of the battery pack. The system processor is used to communicate with the encryption authentication chip in a single line and output the encryption authentication signal; the thermistor pin of the power management chip is connected to the input and output pins of the system processor. The power management chip is used to detect the temperature of the battery pack based on the analog voltage input from the temperature detection resistor; the power pin of the system control motherboard is connected to the positive contact of the battery pack, and the ground pin of the system control motherboard is connected to the negative contact of the battery pack.

[0026] Correspondingly, the technical solution of the present invention also provides an electronic device, including the power control architecture.

[0027] Compared with the prior art, the technical solution of the embodiment of the present invention has the following beneficial effects:

[0028] In the battery pack of the technical solution of the present invention, the first end of the temperature detection resistor is connected to the temperature detection pin of the encryption authentication chip, and the second end of the temperature detection resistor is connected to the negative electrode of the battery cell. When the logic control unit controls the first switch unit to be turned off, the temperature detection pin of the encryption authentication chip and the communication pin of the encryption authentication chip are isolated. The logic control unit can extract the first electronic tag signal and the first encrypted calibration signal stored in the encryption authentication unit based on the external input encryption authentication signal and output them to the outside through the communication pin from the bidirectional single-line communication unit. When the logic control unit controls the first switch unit to be turned on, the temperature detection pin of the encryption authentication chip and the communication pin of the encryption authentication chip are connected, and the analog voltage on the temperature detection resistor can be directly output to the outside through the communication pin. Because the communication pin of the encryption authentication chip is connected to the communication temperature detection contact of the battery pack, the analog voltage on the temperature detection resistor and the first electronic tag signal and the first encrypted calibration signal stored in the encryption authentication unit can all be output to the outside through the communication temperature detection contact of the battery pack. Compared with the existing technology, the reuse of single-line communication contacts and temperature detection contacts is achieved, the number of contacts of the battery pack is reduced, and thus the packaging cost of the battery pack is reduced.

[0029] Furthermore, the pull-up resistor is integrated into the encryption authentication chip, and the second switch unit is set, and the logic control unit controls the second switch unit to be turned off when controlling the first switch unit to be turned on. The unidirectional single-line communication unit includes a second buffer, the input end of the second buffer is connected to the second end of the first switch unit, and the output end of the second buffer is connected to the second input end of the logic control unit to ensure that the communication pin and the temperature detection pin are both in a high-resistance state, thereby ensuring the stability and accuracy of the analog voltage of the temperature detection resistor on the temperature detection pin. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 Schematic diagram of the circuit structure of the battery pack provided by the technical solution of the present invention Figure 1 ;

[0031] Figure 2 This is a schematic diagram of the circuit structure of the battery pack provided by the embodiment of the present invention. Figure 2 ;

[0032] Figure 3 This is a schematic diagram of the circuit structure of the battery pack provided by the embodiment of the present invention. Figure 3 ;

[0033] Figure 4 This is a schematic diagram of the circuit structure of the battery pack provided by the embodiment of the present invention. Figure 4 ;

[0034] Figure 5 This is a circuit diagram of the power control architecture provided by the technical solution of the present invention. DETAILED DESCRIPTION

[0035] As described in the background art, existing battery packs equipped with electronic tag chips have the problem of high packaging costs.

[0036] In view of this, the technical solution of the present invention provides a new battery pack.

[0037] in, Figure 1 Schematic diagram of the circuit structure of the battery pack provided by the technical solution of the present invention Figure 1 .

[0038] Please refer to Figure 1 The battery pack provided by the technical solution of the present invention includes: a temperature detection resistor Rntc, a battery cell B1 and an encryption authentication chip 10;

[0039] A first end of the temperature detection resistor Rntc is connected to the temperature detection pin NTC of the encryption authentication chip 10 , a second end of the temperature detection resistor Rntc is connected to the negative electrode of the battery cell B1 , and the positive electrode of the battery cell B1 is connected to the positive contact Pack+ of the battery pack;

[0040] The encryption authentication chip 10 has a communication pin CMD connected to the communication temperature detection contact CMD of the battery pack. NTC, the encryption authentication chip 10 includes: a bidirectional single-line communication unit 110, a unidirectional single-line communication unit 120, a logic control unit 130, an encryption authentication unit 140 and a first switch unit SW1;

[0041] A first end of the first switch unit SW1 is connected to the communication pin CMD, and a second end of the first switch unit SW1 is connected to the temperature detection pin NTC. The first switch unit SW1 is used to control the connection or isolation between the communication pin CMD and the temperature detection pin NTC according to its own conduction or shutdown;

[0042] The bidirectional single-line communication unit 110 is used to perform bidirectional single-line communication with an external system processor through the communication pin CMD on the chip when the first switch unit SW1 is turned off;

[0043] The unidirectional single-line communication unit 120 is used to perform unidirectional single-line communication with an external system processor through the communication pin CMD on the chip when the first switch unit SW1 is turned on;

[0044] The logic control unit 130 is configured to control the first switch unit SW1 to be turned on or off according to an external control signal. The logic control unit 130 is further configured to output a first extraction signal and a second extraction signal according to an external encryption authentication signal, wherein the encryption authentication signal is input by an external system processor through the bidirectional single-line communication unit 110.

[0045] The encryption authentication unit 140 is used to output a first electronic tag signal based on the first extraction signal. The encryption authentication unit 140 is also used to output a first encryption calibration signal based on the second extraction signal. The first electronic tag signal and the first encryption calibration signal are both output to the outside by the bidirectional single-line communication unit 110 through the communication pin CMD.

[0046] Through the above technical means, the technical solution of the present invention can reduce the number of contacts in the battery pack and reduce the packaging cost of the battery pack. The specific reasons are as follows:

[0047] When the logic control unit 130 controls the first switch unit SW1 to be disconnected, the communication pin CMD and the temperature detection pin NTC are isolated, and the external system processor can perform two-way single-line communication with the two-way unit communication unit in the encryption authentication chip 10 in the battery pack. The external system processor transmits the encrypted authentication signal to the logic control unit 130, so that the logic control unit 130 extracts and outputs the first electronic tag signal and the first encrypted calibration signal stored in the encryption authentication unit 140. Because the communication pin CMD of the encryption authentication chip 10 is connected to the communication temperature detection contact CMD of the battery pack NTC, so the first electronic tag signal and the first encrypted calibration signal are communicated from the battery pack temperature detection contact CMD NTC output enables external system processor to complete electronic tag authentication and encryption authentication of the battery pack.

[0048] When the logic control unit 130 controls the first switch unit SW1 to be turned on, the communication pin CMD and the temperature detection pin NTC are connected. Since the first end of the temperature detection resistor Rntc is connected to the temperature detection pin NTC of the encryption authentication chip 10, the analog voltage on the temperature detection resistor Rntc can pass through the communication pin CMD and the communication temperature detection contact CMD of the battery pack. The NTC is transmitted directly to the external system processor.

[0049] Based on the above technical description, the present invention controls the on or off of the first switch unit SW1 so that the analog voltage on the temperature detection resistor Rntc and the first electronic tag and the first encrypted calibration signal stored in the encryption authentication chip 10 are transmitted through the communication temperature detection contact CMD of the battery pack. NTC output, realizes the communication temperature detection contact CMD The output of the NTC is reused, thereby reducing the number of contacts on the battery pack and lowering the packaging cost of the battery pack.

[0050] In order to make the above-mentioned objects, features and beneficial effects of the present invention more obvious and easy to understand, specific embodiments of the present invention are described in detail below with reference to the accompanying drawings.

[0051] Figure 2 This is a schematic diagram of the circuit structure of the battery pack provided by the embodiment of the present invention. Figure 2 .

[0052] Please refer to Figure 2As a specific implementation, the bidirectional single-line communication unit 110 includes: a pull-up resistor R1, a first interface MOS tube M1, a second switch unit SW2, and a first buffer BUF1;

[0053] A first end of the second switch unit SW2 is connected to the power supply pin of the encryption authentication chip 10, and a second end of the second switch unit SW2 is connected to the first end of the pull-up resistor R1; the second end of the pull-up resistor R1, the input end of the first buffer BUF1, and the drain of the first interface MOS transistor M1 are all connected to the communication pin CMD of the encryption authentication chip 10, the source of the first interface MOS transistor M1 is connected to the ground pin of the encryption authentication chip 10, and the gate of the first interface MOS transistor M1 is connected to the output end of the logic control unit 130; the output end of the first buffer BUF1 is connected to the first input end of the logic control unit 130;

[0054] The logic control unit 130 is further configured to control the second switch unit SW2 to be turned off when the first switch unit SW1 is controlled to be turned on, and the logic control unit 130 is further configured to control the second switch unit SW2 to be turned on when the first switch unit SW1 is controlled to be turned off;

[0055] The power supply pin of the encryption authentication chip 10 is connected to the positive electrode of the battery cell B1.

[0056] The unidirectional single-line communication unit 120 includes a second buffer BUF2 , an input end of the second buffer BUF2 is connected to the second end of the first switch unit SW1 , and an output end of the second buffer BUF2 is connected to the second input end of the logic control unit 130 .

[0057] This embodiment has the beneficial effect of ensuring the stability and accuracy of the analog voltage on the temperature detection resistor Rntc during the transmission process. The specific principle is as follows:

[0058] When the logic control unit 130 controls the first switch unit SW1 to turn on, it simultaneously controls the second switch unit SW2 to turn off. Because the communication pin CMD of the encryption authentication chip 10 is connected to the input of the first buffer BUF1, when the second switch unit SW2 is turned off, the communication pin CMD is in a high-impedance state. Furthermore, because the temperature detection pin NTC of the encryption authentication chip 10 is connected to the input of the second buffer BUF2, the temperature detection pin NTC remains in a high-impedance state. When both the communication pin CMD and the temperature detection pin NTC remain in a high-impedance state, the stability and accuracy of the analog voltage on the temperature detection resistor Rntc are ensured during transmission.

[0059] In addition to the above-mentioned beneficial effects, this embodiment also has the following beneficial effects: since the unidirectional single-line communication unit 120 is provided and the unidirectional single-line communication unit 120 and the bidirectional single-line communication unit 110 have different circuit structures, there is no need to run two sets of commands, bidirectional communication and unidirectional communication, on one physical interface at the same time, thereby simplifying the design of the digital circuit in the encryption authentication chip 10.

[0060] It should be noted that both the first buffer BUF1 and the second buffer BUF2 have high input impedance.

[0061] Figure 3 This is a schematic diagram of the circuit structure of the battery pack provided by the embodiment of the present invention. Figure 3 .

[0062] Please refer to Figure 3 As a specific embodiment, the encryption authentication chip 10 further includes a detection current source unit 150, which is respectively connected to the temperature detection pin NTC of the encryption authentication chip 10 and the third input terminal of the logic control unit 130. The detection current source unit 150 is used to output a first current to the temperature detection resistor Rntc through the temperature detection pin NTC of the encryption authentication chip 10 when the first switch unit SW1 is turned off. The detection current source unit 150 is also used to convert the analog voltage at the temperature detection pin NTC into a first digital signal when the first current flows through the temperature detection resistor Rntc. The first digital signal is output to the outside by the bidirectional single-wire communication unit 110 through the communication pin CMD.

[0063] The detection current source unit 150 includes: a first current source and an analog-to-digital converter, the first current source is used to output the first current, and the analog-to-digital converter is used to convert the analog voltage at the temperature detection pin NTC into a first digital signal.

[0064] The logic control unit 130 is further configured to output an interrupt alarm signal when the first digital signal exceeds a first range. The interrupt alarm signal is output by the bidirectional single-line communication unit 110 through the communication pin CMD.

[0065] This embodiment has the beneficial effect of causing a stable current to flow through the temperature detection resistor Rntc, and converting the voltage across the temperature detection resistor Rntc into the first digital signal through the analog-to-digital converter and outputting it externally. Since digital signals are not easily interfered with, the signal transmission accuracy is improved. At the same time, the logic control unit 130 can also detect the first digital signal. When the first digital signal exceeds a first range, the bidirectional single-wire communication unit 110 outputs an interrupt alarm signal externally through the communication pin CMD.

[0066] It should be noted that the first range specifically represents a reasonable temperature range for the battery pack during normal operation. When the battery pack temperature exceeds the maximum value of the first range, it indicates that the battery pack temperature is too high. When the battery pack temperature is less than the minimum value of the first range, it indicates that the battery pack temperature is too low. The specific data in the first range can be set as needed and is not limited here.

[0067] Figure 4 This is a schematic diagram of the circuit structure of the battery pack provided by the embodiment of the present invention. Figure 4 .

[0068] Please refer to Figure 4 The battery pack also includes: the battery protection unit, the first end of the battery protection unit is connected to the positive electrode of the battery cell B1, the second end of the battery protection unit is connected to the negative electrode of the battery cell B1, and the third end of the battery protection unit is connected to the negative electrode contact of the battery pack, and the battery protection unit is used to cut off the connection between the negative electrode of the battery cell B1 and the negative electrode contact of the battery pack when the voltage of the battery cell B1 is lower than a first threshold value.

[0069] Specifically, the battery protection unit includes a battery protection chip, a first protection MOS transistor M2, a second protection NMOS transistor M3, a first resistor R2, and a second resistor R3; a power supply pin of the battery protection chip is connected to the second end of the first resistor R2, the first end of the first resistor R2 serves as the first end of the battery protection unit, a ground pin of the battery protection chip serves as the second end of the battery protection unit, an input pin of the battery protection chip is connected to the second end of the second resistor R3, the first end of the second resistor R3 serves as the third end of the battery protection unit, a first control pin of the battery protection chip is connected to the gate of the first protection MOS transistor M2, a second control pin of the battery protection chip is connected to the gate of the second protection NMOS transistor M3, a source of the first protection MOS transistor M2 is connected to the ground pin of the battery protection chip, a drain of the first protection MOS transistor M2 is connected to the drain of the second protection NMOS transistor M3, and a source of the second protection NMOS transistor M3 is connected to the first end of the second resistor R3.

[0070] The following Figure 4 Taking the circuit structure shown as an example, the working process of the battery pack provided by the embodiment of the present invention is explained.

[0071] Please refer to Figure 4 When the analog voltage of the temperature detection resistor Rntc needs to be directly transmitted, the external system processor outputs a control signal to the logic control unit 130 via the bidirectional single-wire communication unit 110. Based on the control signal, the logic control unit 130 turns on the first switch unit SW1, turns off the second switch unit SW2, and disables the operation of the bidirectional single-wire communication unit 110. At this time, the encryption authentication chip 10 only receives the control signal input by the external system processor via the unidirectional single-wire communication unit 120.

[0072] When the transmission of the analog voltage on the temperature detection resistor Rntc is completed, the external system processor outputs a control signal to the logic control unit 130 through the unidirectional single-line communication unit 120. The logic control unit 130 controls the first switch unit SW1 to turn off, controls the second switch unit SW2 to turn on, and reactivates the operation of the bidirectional single-line communication unit 110 according to the control signal.

[0073] After the bidirectional single-wire communication unit 110 resumes operation, the external system processor outputs the encrypted authentication signal to the logic control unit 130 through the bidirectional single-wire communication unit 110 when electronic tag authentication and encryption authentication are required. The logic control unit 130 outputs a first extraction signal and a second extraction signal to the encryption authentication unit 140 based on the encrypted authentication signal. The encryption authentication unit 140 outputs a first electronic tag signal based on the first extraction signal and outputs the first encrypted calibration signal based on the second extraction signal. The bidirectional single-wire communication unit 110 outputs the first electronic tag signal and the first encrypted calibration signal to the external system processor through the communication pin CMD. At the same time, the first current source in the detection current source unit 150 outputs a first current to the temperature detection resistor Rntc, and converts the analog voltage on the temperature detection resistor Rntc into the corresponding first digital signal through the analog-to-digital converter. The bidirectional single-wire communication unit 110 outputs the first digital signal to the external system processor through the communication pin CMD. When the first digital signal exceeds a first threshold, the logic control unit 130 will also actively output an interrupt alarm signal to the external system processor through the bidirectional single-line communication unit 110 .

[0074] When the voltage of the battery cell B1 is lower than a first threshold, the battery protection chip turns off the first protection MOS tube M2 and the second protection NMOS tube M3 by controlling the gate voltage of the first protection MOS tube M2 and the gate voltage of the second protection NMOS tube M3, thereby cutting off the external discharge of the battery cell B1.

[0075] In summary, the battery pack provided in an embodiment of the present invention reduces the setting of contacts on the battery pack and reduces the packaging cost of the battery pack by reusing the communication temperature detection contacts of the battery pack to output the analog voltage on the temperature detection resistor, and the first electronic tag and the first encryption calibration signal stored in the encryption authentication chip.

[0076] Furthermore, by integrating the pull-up resistor into the encryption authentication chip, setting the second switch unit, and making the logic control unit control the second switch unit to be turned off when controlling the first switch unit to be turned on, the analog voltages of the communication pin and the temperature detection pin on the temperature detection resistor are maintained in a high-impedance state during the transmission process, thereby ensuring the stability and accuracy of the analog voltage transmission.

[0077] Furthermore, since the unidirectional single-line communication unit is provided and the unidirectional single-line communication unit and the bidirectional single-line communication unit have different circuit structures, there is no need to run two sets of commands, bidirectional communication and unidirectional communication, on one physical interface at the same time, thereby simplifying the design of the digital circuit in the encryption authentication chip.

[0078] Furthermore, by providing the detection current source unit, a stable current flows through the temperature detection resistor, and the voltage across the temperature detection resistor is converted into the first digital signal by an analog-to-digital converter and output externally. Since digital signals are less susceptible to interference, signal transmission accuracy is improved. Simultaneously, the logic control unit can also detect the first digital signal. When the first digital signal exceeds a first range, the bidirectional single-wire communication unit outputs an interrupt alarm signal externally via the communication pin.

[0079] The technical solution of the present invention also provides a new power supply control architecture.

[0080] in, Figure 5 This is a circuit diagram of the power control architecture provided by the technical solution of the present invention.

[0081] Please refer to Figure 5 The power control architecture provided by the technical solution of the present invention includes: a system control mainboard 2 and the battery pack 1 provided by the technical solution of the present invention;

[0082] The system control motherboard 2 includes: a system processor 22 and a power management chip 21, the input and output pins CMD of the system processor 22 are connected to the communication temperature detection contact CMD of the battery pack NTC, the system processor 22 is used to communicate with the encryption authentication chip 10 in a single line and output the encryption authentication signal; the thermistor pin NTC of the power management chip 21 is connected to the input and output pin CMD of the system processor 22, and the power management chip 21 is used to detect the temperature of the battery pack according to the analog voltage of the input temperature detection resistor Rntc; the power pin PACK+ of the system control motherboard 2 is connected to the positive contact Pack+ of the battery pack, and the ground pin PACK- of the system control motherboard 2 is connected to the negative contact Pack- of the battery pack.

[0083] Since the battery pack realizes the functional reuse of the temperature detection contacts, the pin settings of the system control mainboard 2 are correspondingly reduced, thereby reducing the manufacturing cost of the system control mainboard 2.

[0084] The technical solution of the present invention further provides an electronic device, comprising the power control architecture provided by the technical solution of the present invention.

[0085] Although the present invention is disclosed as above, the present invention is not limited thereto. Any person skilled in the art can make various changes and modifications without departing from the spirit and scope of the present invention. Therefore, the scope of protection of the present invention should be based on the scope defined by the claims.

Claims

1. A battery pack, characterized in that: include: Temperature detection resistor, battery cell and encryption authentication chip; The first end of the temperature detection resistor is connected to the temperature detection pin of the encryption authentication chip, the second end of the temperature detection resistor is connected to the negative electrode of the battery cell, and the positive electrode of the battery cell is connected to the positive electrode contact of the battery pack; An encryption authentication chip, wherein the communication pin of the encryption authentication chip is connected to the communication temperature detection contact of the battery pack, and the encryption authentication chip includes: a bidirectional single-line communication unit, a unidirectional single-line communication unit, a logic control unit, an encryption authentication unit, and a first switch unit; A first end of the first switch unit is connected to the communication pin, and a second end of the first switch unit is connected to the temperature detection pin. The first switch unit is used to control the connection or isolation between the communication pin and the temperature detection pin according to whether the first switch unit is turned on or off; The bidirectional single-line communication unit is used to perform bidirectional single-line communication with an external system processor through the communication pin on the chip when the first switch unit is turned off; The unidirectional single-line communication unit is used to perform unidirectional single-line communication with an external system processor through the communication pin on the chip when the first switch unit is turned on; The logic control unit is used to control the first switch unit to be turned on or off according to an external control signal, and the logic control unit is further used to output a first extraction signal and a second extraction signal according to an external encrypted authentication signal, wherein the encrypted authentication signal is input by an external system processor through the bidirectional single-line communication unit; An encryption authentication unit, the encryption authentication unit is used to output a first electronic tag signal based on the first extraction signal, and the encryption authentication unit is also used to output a first encrypted calibration signal based on the second extraction signal. The first electronic tag signal and the first encrypted calibration signal are both output to the outside by the bidirectional single-line communication unit through the communication pin.

2. The battery pack according to claim 1, wherein: The bidirectional single-line communication unit includes: a pull-up resistor, a first interface MOS tube, a second switch unit, and a first buffer; A first end of the second switch unit is connected to the power supply pin of the encryption authentication chip, and a second end of the second switch unit is connected to the first end of the pull-up resistor; the second end of the pull-up resistor, the input end of the first buffer, and the drain of the first interface MOS transistor are all connected to the communication pin of the encryption authentication chip, the source of the first interface MOS transistor is connected to the ground pin of the encryption authentication chip, and the gate of the first interface MOS transistor is connected to the output end of the logic control unit; the output end of the first buffer is connected to the first input end of the logic control unit; The logic control unit is further configured to control the second switch unit to be turned off when the first switch unit is controlled to be turned on, and the logic control unit is further configured to control the second switch unit to be turned on when the first switch unit is controlled to be turned off; The power supply pin of the encryption authentication chip is connected to the positive electrode of the battery cell.

3. The battery pack according to claim 2, wherein: The unidirectional single-line communication unit includes a second buffer, an input end of the second buffer is connected to the second end of the first switch unit, and an output end of the second buffer is connected to the second input end of the logic control unit.

4. The battery pack according to claim 1, wherein: The encryption authentication chip also includes a detection current source unit, which is respectively connected to the temperature detection pin of the encryption authentication chip and the third input end of the logic control unit. The detection current source unit is used to output a first current to the temperature detection resistor through the temperature detection pin of the encryption authentication chip when the first switch unit is turned off. The detection current source unit is also used to convert the analog voltage at the temperature detection pin into a first digital signal when the first current flows through the temperature detection resistor. The first digital signal is output to the outside by the bidirectional single-line communication unit through the communication pin.

5. The battery pack according to claim 4, characterized in that: The detection current source unit includes: a first current source and an analog-to-digital converter, the first current source is used to output the first current, and the analog-to-digital converter is used to convert the analog voltage at the temperature detection pin into a first digital signal.

6. The battery pack according to claim 4, characterized in that: The logic control unit is further configured to output an interrupt alarm signal when the first digital signal exceeds a first range. The interrupt alarm signal is output to the outside by the bidirectional single-line communication unit through the communication pin.

7. The battery pack according to claim 1, wherein: The battery pack also includes: a battery protection unit, a first end of the battery protection unit is connected to the positive electrode of the battery cell, a second end of the battery protection unit is connected to the negative electrode of the battery cell, and a third end of the battery protection unit is connected to the negative electrode contact of the battery pack, and the battery protection unit is used to cut off the connection between the negative electrode of the battery cell and the negative electrode contact of the battery pack when the voltage of the battery cell is lower than a first threshold value.

8. The battery pack according to claim 7, characterized in that: The battery protection unit includes a battery protection chip, a first protection NMOS transistor, a second protection NMOS transistor, a first resistor and a second resistor; the power supply pin of the battery protection chip is connected to the second end of the first resistor, the first end of the first resistor serves as the first end of the battery protection unit, the ground pin of the battery protection chip serves as the second end of the battery protection unit, the input pin of the battery protection chip is connected to the second end of the second resistor, the first end of the second resistor serves as the third end of the battery protection unit, the first control pin of the battery protection chip is connected to the gate of the first protection NMOS transistor, the second control pin of the battery protection chip is connected to the gate of the second protection NMOS transistor, the source of the first protection NMOS transistor is connected to the ground pin of the battery protection chip, the drain of the first protection NMOS transistor is connected to the drain of the second protection NMOS transistor, and the source of the second protection NMOS transistor is connected to the first end of the second resistor.

9. A power control architecture, characterized in that: include: A system control motherboard and a battery pack according to any one of claims 1 to 8; The system control motherboard includes: a system processor and a power management chip. The input and output pins of the system processor are connected to the communication temperature detection contacts of the battery pack. The system processor is used to communicate with the encryption authentication chip in a single line and output the encryption authentication signal; the thermistor pin of the power management chip is connected to the input and output pins of the system processor. The power management chip is used to detect the temperature of the battery pack based on the analog voltage input from the temperature detection resistor; the power pin of the system control motherboard is connected to the positive contact of the battery pack, and the ground pin of the system control motherboard is connected to the negative contact of the battery pack.

10. An electronic device, characterized in that: Including the power control architecture described in claim 9.

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