Charging and discharging management system and wearable medical instrument

Abstract

The utility model provides a charge and discharge management system and a wearable medical instrument. The charge and discharge management system comprises a charge and discharge interface, a switch module, a control module and a battery module, the battery module is connected with the charging and discharging interface through the switch module; the switch module comprises a one-way conduction unit and a controlled conduction unit, and the control module is connected with the controlled conduction unit; wherein the one-way conduction unit allows current from the charging and discharging interface to the battery module to be conducted in a one-way manner; and the controlled conduction unit is conducted when receiving the conduction signal from the control module, and is disconnected when not receiving the conduction signal. According to the configuration, based on the arrangement of same-port charging and discharging, the simplification of the circuit is ensured. The switch module is arranged through the control module, so that the discharging state can be effectively controlled, and the safety of the wearable medical instrument can be improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to medical instrument technical field, especially wearable medical instrument of a kind of charge-discharge management system. BACKGROUND

[0002] With the wide application of wearable medical instrument, the requirement of battery management system is higher and higher, especially in charging and discharging control. The traditional charge-discharge wearable medical instrument generally judges charging or discharging automatically by integrated management chip according to state, but this control method is difficult to effectively control the discharging state, and thus cannot actively cut off the discharge, resulting in that the discharging state cannot be controlled.

[0003] At the same time, the battery of wearable medical instrument is usually located in its main body, which makes the main body very heavy and reduces the comfort of the user when wearing. If the battery and the main body are designed separately, the charging port and the discharging port of the battery need to be set separately, and different lines are needed for charging and discharging, and the discharging state cannot be controlled, which brings many inconveniences to the use. SUMMARY

[0004] The utility model aims at providing a kind of charge-discharge management system and wearable medical instrument to solve the problem that the discharging state cannot be controlled in the existing charge-discharge management system.

[0005] To solve the above technical problems, the utility model provides a kind of charge-discharge management system for wearable medical instrument, the charge-discharge management system includes: charge-discharge interface, switch module, control module and battery module;The battery module is connected with the charge-discharge interface by the switch module;The switch module includes unidirectional conduction unit and controlled conduction unit, and the control module is connected with the controlled conduction unit;Wherein, the unidirectional conduction unit allows the unidirectional conduction of current from the charge-discharge interface to the battery module;The controlled conduction unit is turned on when receiving the conduction signal from the control module, and is disconnected when not receiving the conduction signal.

[0006] The unidirectional conduction unit includes Schottky diode;The anode of the Schottky diode is connected with the charge-discharge interface, and the cathode of the Schottky diode is connected with the battery module.

[0007] Optionally, the controlled conduction unit includes PMOS tube, the source of the PMOS tube is connected with the battery module, the drain of the PMOS tube is connected with the charge-discharge interface, and the gate of the PMOS tube is connected with the control module.

[0008] Optionally, the battery module comprises a battery and a battery management unit; the battery management unit is connected with the battery and the switch module respectively, and is used to monitor a health state parameter of the battery and cut off the conduction between the battery and the switch module when the health state parameter exceeds a preset safety range.

[0009] Optionally, the battery management unit comprises a battery management chip, a power supply pin of the battery management chip is connected with the switch module, and a battery pin of the battery management chip is connected with the battery.

[0010] Optionally, the charge and discharge management system further comprises a state feedback module.

[0011] The collection end of the state feedback module is connected between the charge and discharge interface and the switch module, and the feedback end of the state feedback module is connected with the control module to output state information to the control module.

[0012] The control module is configured to determine whether to send the conduction signal to the controlled conduction unit based on the state information.

[0013] Optionally, the state feedback module comprises an NMOS tube, the gate of the NMOS tube is configured as the collection end, the drain of the NMOS tube is configured as the feedback end, and the source of the NMOS tube is grounded.

[0014] Optionally, the state feedback module further comprises a pull-down resistor, one end of the pull-down resistor is connected with the gate of the NMOS tube, and the other end is grounded.

[0015] Optionally, the charge and discharge interface is a TYPE-C interface and is used for charging and discharging.

[0016] To solve the above technical problems, the utility model further provides a wearable medical instrument, which comprises the charge and discharge management system.

[0017] In summary, in the charge and discharge management system and the wearable medical instrument, the charge and discharge management system comprises a charge and discharge interface, a switch module, a control module and a battery module; the battery module is connected with the charge and discharge interface through the switch module; the switch module comprises a unidirectional conduction unit and a controlled conduction unit, and the control module is connected with the controlled conduction unit; wherein the unidirectional conduction unit allows unidirectional conduction of current from the charge and discharge interface to the battery module; and the controlled conduction unit is turned on when receiving a conduction signal from the control module and is turned off when not receiving the conduction signal.

[0018] In this way, on the one hand, through the setting of the switch module and the control module, the charge-discharge interface can be used for charging and discharging. Even in the application scenario of the battery of the wearable medical device being designed separately from the main body, based on the setting of the same-port charge-discharge, the line is simplified. On the other hand, through the setting of the control module to the switch module, the discharging state can be effectively controlled, which helps to improve the safety of the wearable medical device. BRIEF DESCRIPTION OF DRAWINGS

[0019] Those skilled in the art will understand that the provided drawings are for the purpose of better illustrating the present application and do not constitute any limitation on the scope of the present application.

[0020] Figure 1 is a module schematic diagram of the charge-discharge management system of the embodiment of the present application.

[0021] Figure 2 is a circuit schematic diagram of the charge-discharge management system of the embodiment of the present application.

[0022] In the drawings: 1-charging and discharging interface; 2-switch module; 21-one-way conduction unit; 22-controlled conduction unit; 3-control module; 4-battery module; 41-battery; 42-battery management unit; 43-battery management chip; 5-state feedback module; 51-acquisition end; 52-feedback end; 6-external device. DETAILED DESCRIPTION

[0023] In order to make the purpose, advantages and characteristics of the present application clearer, the present application will be further described in detail below in combination with the drawings and specific embodiments. It should be noted that the drawings are very simplified and not drawn to scale, and are only used to facilitate and clearly assist in explaining the purpose of the embodiments of the present application. In addition, the structure shown in the drawings is often a part of the actual structure. In particular, the emphasis of each drawing is different, and sometimes different scales are used.

[0024] As used in the present utility model, the singular forms "a," "an," and "the" include plural referents unless the context clearly dictates otherwise. The term, "or," is generally employed in its sense including "and / or," the term "at least one" is generally employed in its sense including "one or more," the term "at least two" is generally employed in its sense including "two or more," and the terms "first," "second," "third," etc., are merely used for the purpose of description and do not indicate or imply relative importance or an indicated number of technical features. Thus, features defined with "first," "second," "third," etc., can explicitly or implicitly include one or at least two of the features. The terms "one end" and "the other end" and "proximal end" and "distal end" generally refer to two corresponding parts, which include not only the end points. In addition, as used in the present utility model, "mounting," "connection," "connected," one element "provided" in another element should be understood broadly, generally only indicates that there is a connection, coupling, cooperation or transmission relationship between the two elements, and the two elements can be directly or indirectly connected, coupled, cooperated or transmitted through intermediate elements, and cannot be understood as indicating or implying the spatial position relationship between the two elements, that is, one element can be in any direction inside, outside, above, below or one side of another element, unless the content is otherwise explicitly indicated. For those skilled in the art, the specific meaning of the above terms in the present utility model can be understood according to the specific circumstances. In addition, directional terms such as above, below, up, down, upward, downward, left, right, etc. are used with respect to the exemplary embodiments as they are shown in the figures, upward or upward direction is toward the top of the corresponding drawing, and downward or downward direction is toward the bottom of the corresponding drawing.

[0025] The utility model discloses a kind of charge-discharge management system and wearable medical apparatus, to solve the problem that discharge state cannot be controlled in existing charge-discharge management system. Described below with reference to the drawings.

[0026] Please refer to Figure 1 And Figure 2 The utility model embodiment provides a kind of charge-discharge management system, it is used for wearable medical apparatus, for example. The charge-discharge management system includes: charge-discharge interface 1, switch module 2, control module 3 and battery module 4;The battery module 4 is connected with the charge-discharge interface 1 by the switch module 2;The switch module 2 includes unidirectional conduction unit 21 and controlled conduction unit 22, the control module 3 is connected with the controlled conduction unit 22;Wherein, the unidirectional conduction unit 21 allows the current unidirectional conduction from the charge-discharge interface 1 to the battery module 4;The controlled conduction unit 22 is conducted when receiving the conduction signal from the control module 3, and is disconnected when not receiving the conduction signal.

[0027] The charge-discharge interface 1 is used to connect with the external device 6, which can be a charging device, a discharging device, or a device for both charging and discharging. Preferably, the charge-discharge interface 1 is a TYPE-C interface, and it is used for both charging and discharging. In one embodiment, as shown in FIG. 1, the A5 pin of the TYPE-C interface can be grounded (GND) through a resistor CR1, the A5 pin of the TYPE-C interface can be grounded through a resistor CR2, the B4, B9, A4, and A9 pins of the TYPE-C interface are connected to an analog ground (AGND) through a TVS tube TVS1, and the power pin VBUS of the TYPE-C interface is connected to the input end of the switch module 2. As an example, the TYPE-C interface can be a TYPE-C-16PIN interface. The function definition and connection mode of other pins of the TYPE-C interface can refer to the prior art, which will not be described here. Figure 2

[0028] The switch module 2 is a switch component for controlling the current flow direction, which includes a unidirectional conduction unit 21 and a controlled conduction unit 22. The unidirectional conduction unit 21 only allows unidirectional conduction of current from the charge-discharge interface 1 to the battery module 4, i.e., only allows charging current to pass through, but does not allow discharging current to pass through. The controlled conduction unit 22 is turned on or off based on the conduction signal of the control module 3, which is equivalent to selectively opening or closing the discharging channel.

[0029] The unidirectional conduction unit 21 plays the following two key roles in the system with the same charge-discharge interface: one is the unidirectional conduction protection in the charging state, and the other is the reverse blocking isolation in the discharging state. Specifically, when the system is in the charging mode, the current flows from the charge-discharge interface 1 to the battery module 4 through the unidirectional conduction unit 21. The unidirectional conduction of the unidirectional conduction unit 21 can prevent the reverse current from flowing back during charging, ensuring that the charging current flows unidirectionally to the battery module 4. In the discharging state, the discharging current can be blocked, so that the discharging current can only flow through the controlled channel of the controlled conduction unit 22 to achieve precise switching control.

[0030] In an alternative example, the unidirectional conduction unit 21 includes a Schottky diode PD1. The positive electrode of the Schottky diode PD1 is connected to the charge-discharge interface 1, and the negative electrode of the Schottky diode PD1 is connected to the battery module 4. As an example, the model of the Schottky diode PD1 can be B5919. It has a relatively low forward voltage drop, a fast reverse recovery time, and a high surge current bearing capacity. In the case of abnormal reverse connection, the Schottky diode PD1 can provide hardware-level reverse voltage protection, and together with the TVS tube TVS1, it forms an overvoltage protection system at the end of the charge-discharge interface 1.

[0031] ​Of course, it is understood that the Schottky diode is only an example of the unidirectional conduction unit 21, and in other embodiments, the unidirectional conduction unit 21 can also include other types of diodes, triodes, MOS, etc. Those skilled in the art can configure according to the actual situation.

[0032] The controlled conduction unit 22 is provided, which mainly plays a core intelligent control function in the system with the same charging and discharging port. Its role mainly includes the following three aspects:

[0033] The first aspect is to serve as an intelligent switch of the discharging circuit. Whether the controlled conduction unit 22 is turned on or not is controlled based on the conduction signal of the control module 3. The control module 3 can control the discharging in an open loop mode based on the set program, or control the discharging in a closed loop mode based on the detection of the state parameters (such as current, voltage, temperature, etc.) in the circuit.

[0034] The second aspect is to realize dynamic isolation of the charging and discharging path. The unidirectional conduction unit 21 only allows the charging current to conduct, and through the control of the controlled conduction unit 22, the controlled conduction unit 22 can only be turned on during discharging, thereby forming a double isolation barrier to prevent the mutual interconnection of the charging and discharging bidirectional currents.

[0035] The third aspect is to realize multiple safety protection functions. Through the detection of the discharging current, voltage and other parameters, overcurrent protection, reverse connection protection and other safety protection can be realized. Once triggered, the controlled conduction unit 22 can be quickly turned off by the control module 3 to ensure the safety of the circuit.

[0036] In an alternative example, the controlled conduction unit 22 includes a PMOS tube PQ1, the source of the PMOS tube PQ1 is connected with the battery module 4, the drain of the PMOS tube PQ1 is connected with the charging and discharging interface 1, and the gate of the PMOS tube PQ1 is connected with the control module 3. As an example, the model of the PMOS tube PQ1 can be selected as CJ2309. Corresponding to the PMOS tube, the conduction signal of the control module 3 can be low level. When the control module 3 outputs the conduction signal, the VGS of the PMOS tube PQ1 is negative, and the PMOS tube PQ1 can meet the conduction requirement. When the control module 3 does not output the conduction signal, the gate of the PMOS tube PQ1 can be suspended or pulled up by a pull-up resistor, so that VGS does not meet the conduction threshold, and the PMOS tube PQ1 is turned off.

[0037] Of course, it is understood that the PMOS tube is only an example of the controlled conduction unit 22, and in other embodiments, the controlled conduction unit 22 can also include NMOS tubes and other transistors, at which time the corresponding conduction signal can be high level (i.e. higher than the voltage of the battery module 4), so as to realize the conduction requirement of VGS being positive.

[0038] Optionally, the battery module 4 comprises a battery 41 and a battery management unit 42; the battery management unit 42 is connected with the battery 41 and the switch module 2 respectively, and is used to monitor the health state parameters of the battery 41 and to cut off the conduction between the battery 41 and the switch module 2 when the health state parameters exceed the preset safety range. The battery management unit 42 is responsible for monitoring and managing the health state parameters of the battery 41, including the voltage, current, temperature and other parameters of the battery 41. The setting of the battery management unit 42 can ensure that the battery 41 operates within a safe range and provides overcharge and overdischarge protection functions. The battery 41 is preferably a lithium battery.

[0039] Optionally, the battery management unit 42 comprises a battery management chip 43, the power supply pin VOUT of the battery management chip 43 is connected with the switch module 2, and the battery pin BTP of the battery management chip 43 is connected with the battery 41. According to different types of batteries 41, the battery management unit 42 selects the corresponding battery management chip 43. For example, if the battery 41 is a ternary lithium battery, its full charge voltage is about 4.2V, and if the battery 41 is a lithium iron phosphate battery, its full charge voltage is about 3.7V. The charge-discharge curves of different types of lithium batteries are also different. Therefore, the corresponding battery management chip 43 should be selected according to the type of the battery. As an example, the model of the battery management chip 43 can be HM5827.

[0040] Please refer to Figure 1 In one embodiment, the charge-discharge management system further comprises a state feedback module 5; the collection end 51 of the state feedback module 5 is connected between the charge-discharge interface 1 and the switch module 2, the feedback end 52 of the state feedback module 5 is connected with the control module 3 to output state information to the control module 3; the control module 3 is configured to determine whether to send the conduction signal to the controlled conduction unit 22 based on the state information.

[0041] The setting of the state feedback module 5 enables the charge-discharge management system to realize closed-loop management of discharging. Specifically, the state feedback module 5 can obtain the current output state of the charge-discharge interface 1 by monitoring the voltage at the collection end 51, including the direction and size of the current, which reflects the current charge-discharge state in the circuit. Then the state feedback module 5 can feed back the current output state to the control module 3 through the feedback end 52, and the control module 3 can adjust the discharging state in real time according to the feedback current output state, specifically by adjusting and controlling through the conduction signal.

[0042] In one example, the state feedback module 5 comprises an NMOS tube PQ2, the gate of the NMOS tube PQ2 is configured as the collection end 51, the drain of the NMOS tube PQ2 is configured as the feedback end 52, and the source of the NMOS tube PQ2 is grounded. When the charging and discharging interface 1 is connected with a charging device, the collection end 51 is at a high level, because the source of the NMOS tube PQ2 is grounded, VGS is positive, the NMOS tube PQ2 is turned on, and the drain of the NMOS tube PQ2 is grounded through the source. At this time, the state feedback module 5 feeds back a low-level signal to the control module 3 through the feedback end 52 as a current output state, and it can be understood that the low level can be set as charging information reflecting the charging state. Corresponding to the charging state, the control module 3 can control the controlled conduction unit 22 to be turned off. When the charging and discharging interface 1 is connected with a discharging device, the level of the collection end 51 is relatively low, and VGS of the NMOS tube PQ2 makes it in a non-saturated variable resistance state. At this time, the state feedback module 5 feeds back a variable level signal to the control module 3 through the feedback end 52 as a current output state, and it can be understood that the variable level signal can be set as charging information reflecting the discharging state. Corresponding to the discharging state, the control module 3 can control the controlled conduction unit 22 to be turned on or turned off according to actual conditions, so as to realize control of discharging.

[0043] Optionally, the state feedback module 5 further comprises a pull-down resistor PR6, one end of the pull-down resistor PR6 is connected with the gate of the NMOS tube PQ2, and the other end is grounded. When the charging and discharging interface 1 is not connected with a device, the level of the collection end 51 can be pulled down by the pull-down resistor PR6, VGS of the NMOS tube PQ2 is zero, the NMOS tube PQ2 is turned off, and at this time, the state feedback module 5 feeds back a low-level signal to the control module 3 through the feedback end 52 as a current output state. The control module 3 controls the controlled conduction unit 22 to be turned off.

[0044] The embodiment of the utility model further provides a wearable medical instrument, which comprises the charging and discharging management system as described above. The embodiment does not limit the specific type of the wearable medical instrument.

[0045] In summary, in the charging and discharging management system and the wearable medical device, the charging and discharging management system comprises a charging and discharging interface, a switch module, a control module and a battery module; the battery module is connected with the charging and discharging interface through the switch module; the switch module comprises a unidirectional conduction unit and a controlled conduction unit, the control module is connected with the controlled conduction unit; wherein the unidirectional conduction unit allows unidirectional conduction of current from the charging and discharging interface to the battery module; the controlled conduction unit is turned on when receiving a conduction signal from the control module, and is turned off when not receiving the conduction signal. By configuring the switch module and the control module, the charging and discharging interface can be used for charging and discharging. Even in the application scenario that the battery of the wearable medical device is designed in a split type with the main body, based on the same charging and discharging setting, the line is simplified. On the other hand, by setting the control module to the switch module, the discharge state can be effectively controlled, which helps to improve the safety of the wearable medical device.

[0046] It should be noted that the above several embodiments can be combined with each other. The above description is only a description of the preferred embodiments of the utility model, and does not limit the scope of the utility model. Any modification or modification made by a person skilled in the art according to the above disclosure is within the protection scope of the utility model.

Claims

1. A charge-discharge management system for a wearable medical device, comprising: The charging and discharging management system comprises a charging and discharging interface, a switch module, a control module and a battery module. The battery module is connected with the charging and discharging interface through the switch module; the switch module comprises a unidirectional conduction unit and a controlled conduction unit, and the control module is connected with the controlled conduction unit. The unidirectional conduction unit allows unidirectional conduction of current from the charging and discharging interface to the battery module; and the controlled conduction unit is turned on when receiving a conduction signal from the control module, and is turned off when not receiving the conduction signal.

2. The charge-discharge management system according to claim 1, characterized by, The unidirectional conduction unit comprises a Schottky diode; the anode of the Schottky diode is connected with the charging and discharging interface, and the cathode of the Schottky diode is connected with the battery module.

3. The charge-discharge management system according to claim 1, characterized by, The controlled conduction unit comprises a PMOS tube; the source of the PMOS tube is connected with the battery module, the drain of the PMOS tube is connected with the charging and discharging interface, and the gate of the PMOS tube is connected with the control module.

4. The charge-discharge management system according to claim 1, characterized by The battery module comprises a battery and a battery management unit; the battery management unit is connected with the battery and the switch module respectively; the battery management unit is used to monitor a health state parameter of the battery, and is used to cut off the conduction between the battery and the switch module when the health state parameter exceeds a preset safety range.

5. The charge-discharge management system according to claim 4, characterized by The battery management unit comprises a battery management chip; a power supply pin of the battery management chip is connected with the switch module, and a battery pin of the battery management chip is connected with the battery.

6. The charge-discharge management system according to claim 1, characterized by The charging and discharging management system further comprises a state feedback module. The acquisition end of the state feedback module is connected between the charging and discharging interface and the switch module, and the feedback end of the state feedback module is connected with the control module to output state information to the control module. The control module is configured to determine whether to send the conduction signal to the controlled conduction unit based on the state information.

7. The charge-discharge management system according to claim 6, characterized by The state feedback module comprises an NMOS tube; the gate of the NMOS tube is configured as the acquisition end, the drain of the NMOS tube is configured as the feedback end, and the source of the NMOS tube is grounded.

8. The charge-discharge management system according to claim 7, characterized by The state feedback module further comprises a pull-down resistor; one end of the pull-down resistor is connected with the gate of the NMOS tube, and the other end is grounded.

9. The charge-discharge management system according to claim 1, characterized by The charging and discharging interface is a TYPE-C interface, which is used for charging and discharging.

10. A wearable medical device, comprising: The charging and discharging management system comprises the charging and discharging management system according to any one of claims 1-9.

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