Battery information monitoring circuit and electronic equipment

Abstract

The invention provides a battery information monitoring circuit and electronic equipment. The battery information monitoring circuit comprises a control module and an information monitoring module, the information monitoring module comprises a plurality of information monitoring circuits, the information monitoring circuits are used for monitoring state information of a battery and sending the state information to the control module, and one information monitoring circuit monitors one kind of state information. According to the invention, the battery can be monitored in all directions.

Description

Technical Field

[0001] The present invention relates to the technical field of batteries, and in particular to a battery information monitoring circuit and electronic equipment. Background Art

[0002] Currently, most electronic devices support battery power supply. As users have higher and higher requirements for battery life, the capacity of batteries is also increasing. However, large-capacity lithium batteries also have the hidden danger of flammability and explosion. Especially for large electronic devices such as electric vehicles, monitoring of battery status is particularly important. However, there is currently no good method to monitor the battery in all aspects. Summary of the invention

[0003] The present invention provides a battery information monitoring circuit and electronic equipment, aiming to solve the problem that the battery status information cannot be fully monitored at present.

[0004] In a first aspect, the present invention provides a battery information monitoring circuit, which includes a control module and an information monitoring module; the information monitoring module includes multiple information monitoring circuits, and the information monitoring circuits are used to monitor the status information of the battery and send the status information to the control module, wherein one information monitoring circuit monitors one type of status information.

[0005] Furthermore, the multiple information monitoring circuits include a temperature detection circuit, a pressure detection circuit, a current detection circuit and a voltage detection circuit; the temperature detection circuit is connected to the control module, and is used to collect the temperature information of the battery, and send the temperature information to the control module; the pressure detection circuit is connected to the control module, and is used to collect the pressure information of the battery, and send the pressure information to the control module; the current detection circuit is connected to the control module, and is used to collect the current information of the battery, and send the current information to the control module; the voltage detection circuit is connected to the control module, and is used to collect the voltage information of the battery, and send the voltage information to the control module.

[0006] Furthermore, the temperature detection circuit includes a temperature acquisition element, and the temperature acquisition element is used to acquire temperature information of the battery.

[0007] Furthermore, the temperature detection circuit also includes a temperature acquisition chip, and the temperature acquisition chip is connected to the temperature acquisition element and the control module respectively.

[0008] Furthermore, the pressure detection circuit includes a sensing bridge element, and the sensing bridge element is used to collect pressure information of the battery.

[0009] Furthermore, the pressure detection circuit also includes a pressure acquisition chip, and the pressure acquisition chip is connected to the sensing bridge element and the control module respectively.

[0010] Furthermore, the current detection circuit includes a current detection circuit, and the current detection circuit is used to collect current information of the battery.

[0011] Furthermore, the current detection circuit includes a current acquisition chip, and the current acquisition chip is connected to the current detection circuit and the control module respectively.

[0012] Furthermore, the voltage detection circuit includes a first operational amplifier and a second operational amplifier, the non-inverting input terminal of the first operational amplifier and the inverting input terminal of the second operational amplifier are both connected to the load circuit of the electronic device, the inverting input terminal of the first operational amplifier and the non-inverting input terminal of the second operational amplifier are both connected to the reference circuit, and the output terminals of the first operational amplifier and the second operational amplifier are both connected to the control module.

[0013] In a second aspect, the present invention further provides an electronic device, comprising the battery information monitoring circuit described in any one of the above items.

[0014] The electronic device disclosed in the present invention includes a battery information monitoring circuit, which includes a control module and an information monitoring module. The information monitoring module includes multiple information monitoring circuits, each of which can monitor one type of battery status information, and multiple information monitoring circuits can simultaneously monitor multiple types of battery status information, thereby achieving all-round monitoring of the battery. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other accompanying drawings can be obtained based on these accompanying drawings without paying any creative work.

[0016] Figure 1 is a block diagram of a battery information monitoring circuit provided by an embodiment of the present invention;

[0017] Figure 2 is a circuit diagram of a temperature detection circuit provided by an embodiment of the present invention;

[0018] Figure 3 is a circuit diagram of a pressure detection circuit provided by an embodiment of the present invention;

[0019] Figure 4 is a circuit diagram of a current detection circuit provided by an embodiment of the present invention;

[0020] Figure 5 is a circuit diagram of a voltage detection circuit provided by an embodiment of the present invention. DETAILED DESCRIPTION

[0021] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0022] It should be understood that when used in this specification and the appended claims, the terms "include" and "comprises" indicate the presence of described features, integers, operations, elements and / or components, but do not exclude the presence or addition of one or more other features, integers, operations, elements, components and / or groups thereof.

[0023] It should also be understood that the terms used in this specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. As used in the specification of the present invention and the appended claims, the singular forms of "a", "an" and "the" are intended to include the plural forms unless the context clearly indicates otherwise. It should also be further understood that the term "and / or" used in the specification of the present invention and the appended claims refers to any combination of one or more of the associated listed items and all possible combinations, and includes these combinations.

[0024] In addition, the directional terms mentioned in the present invention, such as "upper", "lower", "front", "back", "left", "right", "inner", "outer", "side", etc., are only for reference to the directions of the attached drawings and the use status of the product. Therefore, the directional terms used are used to illustrate and understand the present invention, but not to limit the present invention. In addition, in the drawings, structures with similar or identical structures are represented by the same reference numerals.

[0025] See also Figures 1 to 5 , Figure 1 is a block diagram of a battery information monitoring circuit provided by an embodiment of the present invention; Figure 2 is a circuit diagram of a temperature detection circuit 21 provided in one embodiment of the present invention; Figure 3 is a circuit diagram of a pressure detection circuit 22 provided in one embodiment of the present invention; Figure 4 is a circuit diagram of a current detection circuit 23 provided in one embodiment of the present invention; Figure 5 FIG. 2 is a circuit diagram of a voltage detection circuit 24 provided in one embodiment of the present invention. Figure 1As shown, the battery information monitoring circuit includes a control module 10 and an information monitoring module 20; the information monitoring module 20 includes multiple information monitoring circuits, and the information monitoring circuits are used to monitor the status information of the battery and send the status information to the control module 10, wherein one information monitoring circuit monitors one type of status information.

[0026] Among them, the battery information monitoring circuit can be configured in any electronic device to monitor the status information of the battery in the electronic device. For example, the battery information monitoring circuit can be configured in an electric vehicle to monitor the status information of the lithium battery in the electric vehicle.

[0027] The battery information monitoring circuit may include a control module 10 and an information monitoring module 20. The control module 10 may include a control chip, which may be a logic control chip for determining whether to trigger a safety mechanism. The information monitoring module 20 may include multiple information monitoring circuits, which may be used to monitor information such as the battery's current, voltage, temperature, and pressure. For example, the information monitoring module 20 may include four information monitoring circuits, one for monitoring the battery's current information, one for monitoring the battery's voltage information, one for monitoring the battery's temperature information, and the last for monitoring the battery's pressure information. It is understandable that the information monitoring module 20 is not limited to monitoring the above four types of status information, and one or more information monitoring circuits may be added according to actual conditions to monitor the corresponding status information.

[0028] In actual use, if an electric vehicle is equipped with a battery information monitoring circuit, and the information monitoring module 20 of the battery information monitoring circuit includes four information monitoring circuits, which are respectively used to monitor temperature information, pressure information, current information and voltage information, then the control module 10 can confirm the state of the battery according to different information, and perform corresponding early warning actions according to the state of the battery. For example, the control module 10 receives temperature information, and confirms whether the temperature of the battery is too high according to the temperature information. When the temperature of the battery exceeds the threshold, the corresponding early warning action can be triggered, for example, the power supply to the load is disconnected to protect the battery. In addition, a gradient early warning can also be performed, that is, when the temperature of the battery is in a certain range, the control module 10 outputs information to remind the user that the battery temperature is high, and when the temperature of the battery is in another range, the control module 10 outputs alarm information to remind the user that the battery temperature is too high.

[0029] Generally speaking, there can be four levels of safety mechanisms, namely safety, reminder, alarm and protective action. Safety means that the current status information of the battery is in a safe condition and can be used normally. Reminder means that the battery status information is higher than the normal status information, which can remind the user to pay attention to the battery status information. Alarm means that the battery status information is in an abnormal state. Protective action means that the control module 10 automatically triggers a protective action, such as disconnecting the power supply to the load to protect the battery.

[0030] As a further embodiment, the multiple information monitoring circuits include a temperature detection circuit 21, a pressure detection circuit 22, a current detection circuit 23 and a voltage detection circuit 24; the temperature detection circuit 21 is connected to the control module 10, for collecting the temperature information of the battery and sending the temperature information to the control module 10; the pressure detection circuit 22 is connected to the control module 10, for collecting the pressure information of the battery and sending the pressure information to the control module 10; the current detection circuit 23 is connected to the control module 10, for collecting the current information of the battery and sending the current information to the control module 10; the voltage detection circuit 24 is connected to the control module 10, for collecting the voltage information of the battery and sending the voltage information to the control module 10.

[0031] Among them, the temperature detection circuit 21 is used to collect temperature information and send the temperature information to the control module 10. The control module 10 confirms whether the temperature of the battery is in a normal state based on the temperature information. An algorithm can be preset in the control module 10, and the control module 10 can analyze the interval in which the temperature of the battery is through the algorithm, so that the control module 10 can perform corresponding actions. For example, four intervals can be set, the first interval corresponds to normal temperature, the second interval corresponds to higher temperature, and the third interval corresponds to high temperature. When the temperature of the battery exceeds the maximum value of the third interval, it is the fourth interval, indicating that the battery is currently in a dangerous state, and the control module 10 can perform corresponding protection actions. It can be understood that multiple temperature detection circuits 21 can be provided, and different temperature detection circuits 21 are used to obtain temperature information of different areas of the battery, so that the control module 10 can accurately determine the temperature of the battery.

[0032] The pressure detection circuit 22 is used to collect the pressure information of the battery and send the pressure information to the control module 10. The control module 10 confirms the bulging pressure of the battery based on the pressure information, that is, confirms whether the current bulging of the battery is serious. Similarly, the control module 10 can be provided with an algorithm to analyze the pressure information to confirm the severity of the current bulging pressure of the battery. Preferably, the severity of the bulging pressure can be divided into normal, slight bulging, moderate bulging and severe bulging. Normal means that there is no bulging in the battery, slight bulging means that there is slight bulging in the battery, moderate bulging means that the bulging of the battery is more serious, and severe bulging means that the bulging of the battery is serious and needs to be dealt with immediately. The control module 10 outputs corresponding alarm information according to the bulging condition of the battery. It can be understood that the number of pressure detection circuits 22 can be multiple, which are used to monitor the bulging pressure in different areas of the battery.

[0033] The current detection circuit 23 is used to obtain the current information of the battery, which can be connected to the load and send the obtained current information to the control module 10. The control module 10 determines whether the battery needs to be protected from overcurrent based on the current information. The voltage detection circuit 24 is used to obtain the pressure information of the battery and send the obtained pressure information to the control module 10. The control module 10 determines whether the battery needs to be protected from overvoltage based on the pressure information.

[0034] See also Figure 2 As a further embodiment, the temperature detection circuit 21 includes a temperature acquisition element Q1, and the temperature acquisition element Q1 is used to collect temperature information of the battery. Further, the temperature detection circuit 21 also includes a temperature acquisition chip U1, and the temperature acquisition chip U1 is connected to the temperature acquisition element Q1 and the control module 10 respectively.

[0035] The temperature detection circuit 21 may include a temperature acquisition element Q1 and a temperature acquisition chip U1. The temperature acquisition element Q1 is connected to the temperature acquisition chip U1. The temperature acquisition chip U1 is connected to the control module 10. The temperature acquisition element Q1 is used to collect the temperature of the area and send it to the temperature acquisition chip U1. The temperature acquisition chip U1 converts the temperature information collected by the temperature acquisition element Q1 into temperature data and sends it to the control module 10. The temperature acquisition element Q1 may be a temperature sensor, a transistor, or other element capable of collecting temperature, such as Figure 2 As shown, the temperature acquisition element Q1 can be a triode, and the temperature is collected through the temperature characteristics of the diode in the triode. It can be understood that multiple temperature detection circuits 21 correspond to multiple temperature acquisition elements Q1, and multiple temperature acquisition elements Q1 can be set in different areas of the battery to facilitate the collection of temperature information in different areas.

[0036] See also Figure 3As a further embodiment, the pressure detection circuit 22 includes a sensing bridge element, and the sensing bridge element is used to collect pressure information of the battery. Further, the pressure detection circuit 22 also includes a pressure acquisition chip U2, and the pressure acquisition chip U2 is connected to the sensing bridge element and the control module 10 respectively.

[0037] The pressure detection circuit 22 may include a sensing bridge element and a pressure acquisition chip U2. The sensing bridge element may send pressure data to the pressure acquisition chip U2, and the pressure acquisition chip U2 may send the pressure data to the control module 10. Figure 3 As shown, the sensing bridge element may include a fifth resistor R5, a sixth resistor R6, a seventh resistor R7 and an eighth resistor R8. It is understandable that there may be multiple pressure detection circuits 22, and multiple pressure detection circuits 22 correspond to multiple sensing bridge elements. Different sensing bridge elements are arranged in different areas of the battery to collect the bulging pressure of the battery in different areas.

[0038] See also Figure 4 As a further embodiment, the current detection circuit 23 includes a current detection circuit, and the current detection circuit is used to collect the current information of the battery. Further, the current detection circuit 23 includes a current collection chip U3, and the current collection chip U3 is respectively connected to the current detection circuit and the control module 10.

[0039] Among them, the current detection circuit 23 may include a current detection circuit and a current acquisition chip U3, the current detection circuit is connected to the load circuit and the control module 10 respectively, the current detection circuit may include a thirteenth resistor R13, the current acquisition chip U3 can collect the voltage difference of the thirteenth resistor R13, and calculate the current size of the load circuit according to the voltage difference and the resistance value of the thirteenth resistor R13, so as to confirm whether overcurrent protection is needed.

[0040] See also Figure 5 As a further embodiment, the voltage detection circuit 24 includes a first operational amplifier U4 and a second operational amplifier U5, the non-inverting input terminal of the first operational amplifier U4 and the inverting input terminal of the second operational amplifier U5 are both connected to the load circuit of the electronic device, the inverting input terminal of the first operational amplifier U4 and the non-inverting input terminal of the second operational amplifier are both connected to the reference circuit, and the output terminals of the first operational amplifier U4 and the second operational amplifier U5 are both connected to the control module 10.

[0041] Among them, the voltage detection circuit 24 may include a fourteenth resistor R14, a fifteenth resistor R15, a sixteenth resistor R16, and a seventeenth resistor R17. The fourteenth resistor R14 and the fifteenth resistor R15 are used to divide the voltage input to the load circuit, and output the divided voltage signal to the first operational amplifier U4. The sixteenth resistor R16 and the seventeenth resistor R17 are used to divide the voltage input to the load circuit, and output the divided voltage signal to the second operational amplifier U5. The output signals of the first operational amplifier U4 and the second operational amplifier U5 are output to the second switch tube Q2 after passing through the bidirectional diode PD, and finally output to the control module 10. The control module 10 confirms whether overvoltage protection is required based on the received signal.

[0042] The present invention also provides an electronic device, comprising the battery information monitoring circuit described in any one of the above embodiments; the battery information monitoring circuit comprises a control module 10 and an information monitoring module 20; the information monitoring module 20 comprises a plurality of information monitoring circuits, the information monitoring circuit being used to monitor the status information of the battery and send the status information to the control module 10, wherein one of the information monitoring circuits monitors one type of the status information.

[0043] Among them, the battery information monitoring circuit can be configured in any electronic device to monitor the status information of the battery in the electronic device. For example, the battery information monitoring circuit can be configured in an electric vehicle to monitor the status information of the lithium battery in the electric vehicle.

[0044] The battery information monitoring circuit may include a control module 10 and an information monitoring module 20. The control module 10 may include a control chip, which may be a logic control chip for determining whether to trigger a safety mechanism. The information monitoring module 20 may include multiple information monitoring circuits, which may be used to monitor information such as the battery's current, voltage, temperature, and pressure. For example, the information monitoring module 20 may include four information monitoring circuits, one for monitoring the battery's current information, one for monitoring the battery's voltage information, one for monitoring the battery's temperature information, and the last for monitoring the battery's pressure information. It is understandable that the information monitoring module 20 is not limited to monitoring the above four types of status information, and one or more information monitoring circuits may be added according to actual conditions to monitor the corresponding status information.

[0045] In actual use, if an electric vehicle is equipped with a battery information monitoring circuit, and the information monitoring module 20 of the battery information monitoring circuit includes four information monitoring circuits, which are respectively used to monitor temperature information, pressure information, current information and voltage information, then the control module 10 can confirm the state of the battery according to different information, and perform corresponding early warning actions according to the state of the battery. For example, the control module 10 receives temperature information, and confirms whether the temperature of the battery is too high according to the temperature information. When the temperature of the battery exceeds the threshold, the corresponding early warning action can be triggered, for example, the power supply to the load is disconnected to protect the battery. In addition, a gradient early warning can also be performed, that is, when the temperature of the battery is in a certain range, the control module 10 outputs information to remind the user that the battery temperature is high, and when the temperature of the battery is in another range, the control module 10 outputs alarm information to remind the user that the battery temperature is too high.

[0046] Generally speaking, there can be four levels of safety mechanisms, namely safety, reminder, alarm and protective action. Safety means that the current status information of the battery is in a safe condition and can be used normally. Reminder means that the battery status information is higher than the normal status information, which can remind the user to pay attention to the battery status information. Alarm means that the battery status information is in an abnormal state. Protective action means that the control module 10 automatically triggers a protective action, such as disconnecting the power supply to the load to protect the battery.

[0047] The battery information monitoring circuit and electronic equipment disclosed in the present invention can monitor different status information of the battery through the information monitoring module, thereby realizing all-round monitoring of the battery.

[0048] The above is only a specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can easily think of various equivalent modifications or replacements within the technical scope disclosed by the present invention, and these modifications or replacements should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention shall be based on the protection scope of the claims.

Claims

1. A battery information monitoring circuit, characterized in that: Applied to electronic equipment, the battery information monitoring circuit comprises: Control module; An information monitoring module, the information monitoring module includes a plurality of information monitoring circuits, the information monitoring circuits are used to monitor the status information of the battery and send the status information to the control module, wherein one information monitoring circuit monitors one type of status information.

2. The battery information monitoring circuit according to claim 1, characterized in that: The plurality of information monitoring circuits include a temperature detection circuit, a pressure detection circuit, a current detection circuit and a voltage detection circuit; The temperature detection circuit is connected to the control module, and is used to collect temperature information of the battery and send the temperature information to the control module; The pressure detection circuit is connected to the control module, and is used to collect pressure information of the battery and send the pressure information to the control module; The current detection circuit is connected to the control module, and is used to collect current information of the battery and send the current information to the control module; The voltage detection circuit is connected to the control module, and is used for collecting voltage information of the battery and sending the voltage information to the control module.

3. The battery information monitoring circuit according to claim 2, characterized in that: The temperature detection circuit includes a temperature acquisition element, and the temperature acquisition element is used to collect temperature information of the battery.

4. The battery information monitoring circuit according to claim 3, characterized in that: The temperature detection circuit also includes a temperature acquisition chip, and the temperature acquisition chip is connected to the temperature acquisition element and the control module respectively.

5. The battery information monitoring circuit as claimed in claim 2, characterized in that: The pressure detection circuit includes a sensing bridge element, and the sensing bridge element is used to collect pressure information of the battery.

6. The battery information monitoring circuit according to claim 5, characterized in that: The pressure detection circuit also includes a pressure acquisition chip, and the pressure acquisition chip is connected to the sensing bridge element and the control module respectively.

7. The battery information monitoring circuit according to claim 2, characterized in that: The current detection circuit includes a current detection circuit, and the current detection circuit is used to collect current information of the battery.

8. The battery information monitoring circuit according to claim 7, characterized in that: The current detection circuit includes a current acquisition chip, and the current acquisition chip is connected to the current detection circuit and the control module respectively.

9. The battery information monitoring circuit according to claim 2, characterized in that: The voltage detection circuit includes a first operational amplifier and a second operational amplifier, the non-inverting input terminal of the first operational amplifier and the inverting input terminal of the second operational amplifier are both connected to the load circuit of the electronic device, the inverting input terminal of the first operational amplifier and the non-inverting input terminal of the second operational amplifier are both connected to the reference circuit, and the output terminals of the first operational amplifier and the second operational amplifier are both connected to the control module.

10. An electronic device, characterized in that: The invention comprises a battery and a battery information monitoring circuit as described in any one of claims 1 to 9.

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