Low-power-consumption Bluetooth chip control circuit, power battery and electric motorcycle

Abstract

The utility model relates to the technical field of battery management, and discloses a low-power-consumption Bluetooth chip control circuit, a power battery and an electric motorcycle. The Bluetooth chip control circuit is electrically connected between a GND pin of a Bluetooth chip and a signal ground, and comprises a switching tube Q2, a resistor R8 and a resistor R9, the first end of the resistor R8 is used for being electrically connected with the power-on / power-off signal output end of an MCU of a BMS, the second end of the resistor R8 is electrically connected with the first end of the resistor R9 and the control end of the switching tube Q2, the positive wiring end of the switching tube Q2 is electrically connected with the GND pin of the Bluetooth chip, and the second end of the resistor R9 and the negative wiring end of the switching tube Q2 are electrically connected with the signal ground. According to the utility model, when the BMS enters the dormancy state, the Bluetooth chip enters the low-power-consumption mode by disconnecting the GND of the Bluetooth chip, and the self-power-consumption of the Bluetooth is reduced from 2mA to 100uA through test verification, so that the self-power-consumption of the Bluetooth module is effectively reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to battery management technical field especially relates to a low -power consumption's bluetooth chip control circuit, power battery and electric motorcycle. BACKGROUND

[0002] The bluetooth module is the battery application program upgrade module designed to meet the increasingly diversified customer demand of electric motorcycle. For the BMS (battery management system) of the battery, in order to reduce power consumption to increase the endurance of the battery, when not using the bluetooth module, it is best to turn off the bluetooth function, so that the whole bluetooth module remains a relatively low self-consumption.

[0003] In the traditional hardware scheme, the chip power-off is generally to disconnect the working power supply VCC of the chip first. However, for the bluetooth module, after disconnecting the working power supply, the RX / TX pins of the bluetooth serial communication and the RX / TX of the MCU are still connected, which will cause the self-consumption of the bluetooth module to abnormally increase, even 5-10 times larger than the current during normal operation, about 2mA, so the traditional chip power-off scheme is not suitable for the bluetooth module.

[0004] Therefore, there is an urgent need in the art to design a control circuit for controlling the power-on / off of the bluetooth chip, so as to effectively reduce the self-consumption of the bluetooth module when the BMS enters sleep.

[0005] The above information is given as background information only to assist with understanding the present disclosure, and does not determine or acknowledge whether any of the above is available as prior art against the present disclosure. UTILITY MODEL CONTENT

[0006] The utility model aims at providing a low -power consumption's bluetooth chip control circuit, power battery and electric motorcycle, to solve or at least partially solve the technical problems existing in the prior art.

[0007] To achieve this purpose, the utility model adopts the following technical scheme:

[0008] In the first aspect, the utility model provides a low -power consumption's bluetooth chip control circuit, and is electrically connected between the GND pin of the bluetooth chip and the signal ground, and includes a switch tube Q2, a resistor R8 and a resistor R9.

[0009] The first end of the resistor R8 is used for electrically connecting the power-on / off signal output end of the MCU of the BMS, the second end of the resistor R8 is electrically connected with the first end of the resistor R9 and the control end of the switch tube Q2 respectively, the positive connection end of the switch tube Q2 is electrically connected with the GND pin of the bluetooth chip, and the second end of the resistor R9 and the negative connection end of the switch tube Q2 are both electrically connected with the signal ground.

[0010] When the power-on / off signal output terminal outputs a high-level power-on signal, the switch Q2 is turned on; when the power-on / off signal output terminal does not output the power-on signal, the switch Q2 is turned off or not turned on.

[0011] Optionally, the switching transistor Q2 is an NPN transistor; the positive terminal of the switching transistor Q2 is the collector of the NPN transistor, the negative terminal of the switching transistor Q2 is the emitter of the NPN transistor, and the control of the switching transistor Q2 is the base of the NPN transistor.

[0012] Optionally, the switch Q2 is an enhancement-mode NMOS transistor; the positive terminal of the switch Q2 is the drain of the NMOS transistor, the negative terminal of the switch Q2 is the source of the NMOS transistor, and the switch Q2 is controlled by the gate of the NMOS transistor.

[0013] Optionally, the power supply pin of the Bluetooth chip is electrically connected to the VCC operating power supply through resistor R2;

[0014] The Bluetooth chip has a serial interface for establishing a communication connection with the MCU of the BMS, and the serial interface includes a TX pin and an RX pin.

[0015] Secondly, this utility model also provides a power battery, including a BMS, the BMS including an MCU, the MCU being electrically connected to a Bluetooth chip, the Bluetooth chip being electrically connected to a control circuit for controlling the Bluetooth chip to be powered on / off, the control circuit adopting a low-power Bluetooth chip control circuit as described above.

[0016] Optionally, the MCU is a microcontroller of model S9KEAZ128AMLH; the Bluetooth chip is a Bluetooth chip of model F-9788.

[0017] Optionally, the power battery is a lithium-ion battery.

[0018] Thirdly, this utility model also provides an electric motorcycle equipped with a power battery, wherein the power battery adopts the power battery described above.

[0019] Compared with the prior art, the present invention has the following beneficial effects:

[0020] This invention enables the Bluetooth chip to enter a low-power mode by disconnecting the Bluetooth chip's GND when the BMS enters sleep mode. Tests have verified that the Bluetooth self-power consumption is reduced from 2mA to 100uA, effectively reducing the self-power consumption of the Bluetooth module.

[0021] This invention has other features and advantages that will be apparent from or will be set forth in detail in the accompanying drawings and the following detailed description, which together serve to explain the particular principles of this invention. Attached Figure Description

[0022] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0023] Figure 1 This is a schematic diagram of a low-power Bluetooth chip control circuit provided in an embodiment of the present invention.

[0024] Figure 2 This is a circuit connection structure diagram of an internal BMS provided by an embodiment of the present invention. Detailed Implementation

[0025] To illustrate the possible application scenarios, technical principles, implementable specific solutions, and achievable objectives and effects of this application in detail, the following description, in conjunction with the listed specific embodiments and accompanying drawings, provides a detailed explanation. The embodiments described herein are merely illustrative of the technical solutions of this application and are therefore intended to limit the scope of protection of this application.

[0026] In this document, the term "embodiment" means that a specific feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The term "embodiment" appearing in various places throughout the specification does not necessarily refer to the same embodiment, nor does it specifically limit its independence or connection with other embodiments. In principle, in this application, as long as there are no technical contradictions or conflicts, the technical features mentioned in each embodiment can be combined in any way to form corresponding implementable technical solutions.

[0027] Unless otherwise defined, the technical terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains; the use of related terms herein is merely for the purpose of describing particular embodiments and is not intended to limit this application.

[0028] In the description of this application, the term "and / or" is used to describe the logical relationship between objects, indicating that three relationships can exist. For example, A and / or B means: A exists, B exists, and A and B exist simultaneously. Additionally, the character " / " in this document generally indicates that the preceding and following objects have an "or" logical relationship.

[0029] In this application, terms such as “first” and “second” are used only to distinguish one entity or operation from another, and do not necessarily require or imply any actual quantity, hierarchy or order relationship between these entities or operations.

[0030] Unless otherwise specified, the use of terms such as “comprising,” “including,” “having,” or other similar expressions in this application is intended to cover non-exclusive inclusion, which does not exclude the presence of additional elements in a process, method, or product that includes the stated elements, such that a process, method, or product that includes a list of elements may include not only those defined elements but also other elements not expressly listed, or elements inherent to such a process, method, or product.

[0031] Similar to the understanding in the Examination Guidelines, in this application, expressions such as "greater than," "less than," and "exceeding" are understood to exclude the stated number; expressions such as "above," "below," and "within" are understood to include the stated number. Furthermore, in the description of the embodiments in this application, "multiple" means two or more (including two), and similar expressions related to "multiple" are also understood in this way, such as "multiple groups" and "multiple times," unless otherwise explicitly specified.

[0032] In the description of the embodiments of this application, the space-related expressions used, such as "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "vertical," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential," indicate the orientation or positional relationship based on the orientation or positional relationship shown in the specific embodiments or drawings. They are only for the purpose of describing the specific embodiments of this application or for the reader's understanding, and do not indicate or imply that the device or component referred to must have a specific position, a specific orientation, or be constructed or operated in a specific orientation. Therefore, they should not be construed as limitations on the embodiments of this application.

[0033] Unless otherwise expressly specified or limited, the terms "installation," "connection," "linking," "fixing," and "setting," as used in the description of the embodiments of this application, should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral setting; it can be a mechanical connection, an electrical connection, or a communication connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be the internal connection of two components or the interaction between two components. For those skilled in the art to which this application pertains, the specific meaning of the above terms in the embodiments of this application can be understood according to the specific circumstances.

[0034] Example 1:

[0035] Please see Figure 1 , Figure 1 This is a schematic diagram of the structure of a low-power Bluetooth chip control circuit provided in an embodiment of this utility model;

[0036] For ease of explanation, Figure 1 The left or top end of an electronic component is called the first end. Figure 1 The right or lower end of an electronic component is called the second end;

[0037] like Figure 1 As shown, this embodiment provides a low-power Bluetooth chip control circuit, which is electrically connected between the GND pin of the Bluetooth chip and the signal ground, specifically including: a switch Q2, a resistor R8, and a resistor R9;

[0038] The first end of resistor R8 is used to electrically connect to the power-on / off signal output terminal of the MCU of BMS. The second end of resistor R8 is electrically connected to the first end of resistor R9 and the control terminal of switch Q2 respectively. The positive terminal of switch Q2 is electrically connected to the GND pin of Bluetooth chip. The second end of resistor R9 and the negative terminal of switch Q2 are both electrically connected to signal ground.

[0039] When the power-on / off signal output terminal outputs a high-level power-on signal, the switch Q2 is turned on; when the power-on / off signal output terminal does not output a power-on signal, the switch Q2 is turned off or not turned on.

[0040] Furthermore, the power supply pin of the Bluetooth chip is electrically connected to the VCC operating power supply through resistor R2;

[0041] As an optional implementation method, such as Figure 1 As shown, the switching transistor Q2 is an NPN transistor; the positive terminal of the switching transistor Q2 is the collector of the NPN transistor, the negative terminal of the switching transistor Q2 is the emitter of the NPN transistor, and the control of the switching transistor Q2 is the base of the NPN transistor.

[0042] The specific working principle is as follows:

[0043] like Figure 1 As shown, when the Bluetooth chip's VCC pin is connected to the operating power supply VCC, but the Bluetooth chip's GND1 is floating, the Bluetooth chip is in sleep mode or not working. For easier understanding, please refer to [the documentation / reference needed]. Figure 2 , Figure 2 This is a circuit connection structure diagram of an internal BMS provided by an embodiment of the present invention; exemplarily, Figure 2 The MCU used in the system is an S9KEAZ128AMLH microcontroller; the Bluetooth chip is an F-9788 Bluetooth chip, which has a serial interface for establishing a communication connection with the MCU of the BMS. The serial interface includes TX pin and RX pin.

[0044] like Figure 2 As shown, if Bluetooth is required to work, the MCU outputs a high level through the ON_BLE_VCC pin to drive the switch Q2 to turn on. After the switch Q2 turns on, it connects the Bluetooth chip GND1 to GND, and the Bluetooth chip is in working state.

[0045] When the Bluetooth chip needs to go into sleep mode, the MCU can output a low level through the ON_BLE_VCC pin to drive the switch Q2 to turn off, thus disconnecting the Bluetooth chip's GND1 from GND. After the Bluetooth chip's GND connection is disconnected, even if there is an abnormal power supply at the Bluetooth RX / TX connection with the MCU's RX / TX, the Bluetooth chip cannot work because GND1 is floating, so no additional self-consumption current is generated, thereby achieving the purpose of reducing the Bluetooth chip's self-consumption current.

[0046] Understandably, the switching transistor Q2 could also be an enhancement-mode NMOS transistor;

[0047] Specifically, the positive terminal of switch Q2 is the drain of the NMOS transistor, the negative terminal of switch Q2 is the source of the NMOS transistor, and the control of switch Q2 is the gate of the NMOS transistor.

[0048] Example 2:

[0049] This embodiment provides a power battery, including a BMS. The BMS includes an MCU, the MCU is electrically connected to a Bluetooth chip, and the Bluetooth chip is electrically connected to a control circuit for controlling the Bluetooth chip to turn on / off. The control circuit adopts a low-power Bluetooth chip control circuit as described in Embodiment 1.

[0050] Furthermore, this embodiment also provides an electric motorcycle equipped with a power battery, which is one of the power batteries described above.

[0051] Since the Bluetooth chip control circuit has been described in detail in Embodiment 1, it will not be repeated in this embodiment.

[0052] In this embodiment, the power battery is a lithium-ion battery.

[0053] In summary, the Bluetooth chip in this embodiment is used to meet the battery application upgrade requirements of the electric motorcycle. When the BMS enters sleep mode, the Bluetooth function is turned off in a controlled manner, so that the entire Bluetooth module maintains a relatively low self-power consumption, which is equivalent to indirectly increasing the battery's range.

[0054] The above-described embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model.

Claims

1. A low-power Bluetooth chip control circuit, characterized in that, Electrically connected between the GND pin of the Bluetooth chip and the signal ground, including switch Q2, resistor R8 and resistor R9; The first end of resistor R8 is used to electrically connect to the power-on / off signal output terminal of the MCU of BMS. The second end of resistor R8 is electrically connected to the first end of resistor R9 and the control terminal of switch Q2 respectively. The positive terminal of switch Q2 is electrically connected to the GND pin of Bluetooth chip. The second end of resistor R9 and the negative terminal of switch Q2 are both electrically connected to the signal ground. When the power-on / off signal output terminal outputs a high-level power-on signal, the switch Q2 is turned on; when the power-on / off signal output terminal does not output the power-on signal, the switch Q2 is turned off or not turned on.

2. The low-power Bluetooth chip control circuit according to claim 1, characterized in that, The switching transistor Q2 is an NPN transistor; the positive terminal of the switching transistor Q2 is the collector of the NPN transistor, the negative terminal of the switching transistor Q2 is the emitter of the NPN transistor, and the control of the switching transistor Q2 is the base of the NPN transistor.

3. The low-power Bluetooth chip control circuit according to claim 1, characterized in that, The switching transistor Q2 is an enhancement-mode NMOS transistor; the positive terminal of the switching transistor Q2 is the drain of the NMOS transistor, the negative terminal of the switching transistor Q2 is the source of the NMOS transistor, and the control of the switching transistor Q2 is the gate of the NMOS transistor.

4. The low-power Bluetooth chip control circuit according to claim 1, characterized in that, The power supply pin of the Bluetooth chip is electrically connected to the VCC operating power supply through resistor R2. The Bluetooth chip has a serial interface for establishing a communication connection with the MCU of the BMS, and the serial interface includes a TX pin and an RX pin.

5. A power battery, comprising a BMS, wherein the BMS includes an MCU, the MCU being electrically connected to a Bluetooth chip, characterized in that, The Bluetooth chip is electrically connected to a control circuit for controlling the Bluetooth chip to be powered on / off, and the control circuit adopts a low-power Bluetooth chip control circuit as described in any one of claims 1-4.

6. A power battery according to claim 5, characterized in that, The MCU is a microcontroller of model S9KEAZ128AMLH; the Bluetooth chip is a Bluetooth chip of model F-9788.

7. A power battery according to claim 5, characterized in that, The power battery is a lithium-ion battery.

8. An electric motorcycle, wherein a power battery is provided, characterized in that, The power battery is the power battery described in claim 5.

9. An electric motorcycle according to claim 8, characterized in that, The MCU is a microcontroller of model S9KEAZ128AMLH; the Bluetooth chip is a Bluetooth chip of model F-9788.

10. An electric motorcycle according to claim 8, characterized in that, The power battery is a lithium-ion battery.

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