CN210273534U - Battery power supply device, battery state detection device and audio playing equipment - Google Patents
Battery power supply device, battery state detection device and audio playing equipment Download PDFInfo
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- CN210273534U CN210273534U CN201921275826.3U CN201921275826U CN210273534U CN 210273534 U CN210273534 U CN 210273534U CN 201921275826 U CN201921275826 U CN 201921275826U CN 210273534 U CN210273534 U CN 210273534U
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Abstract
The application is suitable for the technical field of battery power supply, and provides a battery power supply device, a battery state detection device and audio playing equipment, wherein the battery power supply device comprises a battery, an electronic switch module, a short-circuit conductive piece and a power supply interface. The short circuit conductive piece is arranged at an interval with the positive pole of the battery, the distance between the short circuit conductive piece and the positive pole of the battery is smaller than a set close-range threshold value, the short circuit conductive piece is connected with the control end of the electronic switch module, the positive pole of the battery is connected with the input end of the electronic switch module, and the output end of the electronic switch module is connected with the power supply interface. Whether the short circuit conductive piece has a positive voltage signal means whether the battery has liquid leakage or the positive electrode of the battery has water inlet, and whether the power supply interface has voltage is realized by controlling the on-off state of the electronic switch module. Therefore, the power supply is normally carried out when the battery is normal, the power supply is cut off when the battery leaks or the anode of the battery enters water, the power supply control is actively carried out according to the situation whether the battery leaks or enters the water, and the use safety of the battery is improved.
Description
Technical Field
The application belongs to the technical field of battery power supply, and particularly relates to a battery power supply device, a battery state detection device and an audio playing device.
Background
Currently, many devices have batteries installed therein for powering the device. The different functions of the devices cause different battery use frequencies, some devices have higher battery use frequencies, and some devices have lower battery use frequencies. The battery of the equipment that battery frequency of use is lower generally deposits the time overlength, forgets the words of closing after some equipment uses, and the battery will be in discharge state always, and the battery is crossed to put and can be caused the battery weeping, and moreover, the battery is intake or the words casing of battery time overlength can rust in humid environment, and then leads to the battery shell fragment to rust, corrodes the circuit board at last, causes the damage of equipment. The existing solution is to wrap the battery with plastic or metal to form a battery compartment to increase the sealing performance of the battery compartment, but this method is not only high in cost and inconvenient to disassemble, but also can only passively reduce the influence of the battery on the outside, and can not actively control the power supply according to leakage or water inflow, thereby reducing the use safety of the battery.
SUMMERY OF THE UTILITY MODEL
In view of this, the present application provides a battery power supply device, a battery state detection device, and an audio playback device, so as to solve the problem that in the prior art, power supply control cannot be actively performed according to whether liquid leakage or water inflow occurs, and the use safety of a battery is reduced.
A first aspect of an embodiment of the present application provides a battery-powered device, including:
a battery;
the electronic switch module comprises an input end, a control end and an output end;
short-circuiting the conductive member; and
a power supply interface;
the short circuit conductive piece is arranged at an interval with the positive pole of the battery, the distance between the short circuit conductive piece and the positive pole of the battery is smaller than a set close-range threshold value, the short circuit conductive piece is connected with the control end of the electronic switch module, the positive pole of the battery is connected with the input end of the electronic switch module, and the output end of the electronic switch module is connected with the power supply interface.
Further, the short circuit conductive member is a U-shaped sheet structure surrounding the outside of the positive electrode of the battery.
Further, the electronic switch module is a P-type switch tube.
A second aspect of an embodiment of the present application provides a battery state detection apparatus, including:
a battery;
the electronic switch module comprises an input end, a control end and an output end;
short-circuiting the conductive member; and
a battery state detection module;
the short circuit conductive piece is arranged at an interval with the positive pole of the battery, the distance between the short circuit conductive piece and the positive pole of the battery is smaller than a set close-range threshold value, the short circuit conductive piece is connected with the control end of the electronic switch module, the positive pole of the battery is connected with the input end of the electronic switch module, the output end of the electronic switch module is connected with the battery state detection module, and the battery state detection module is used for judging the battery state according to an electric signal output by the output end of the electronic switch module.
Further, the short circuit conductive member is a U-shaped sheet structure surrounding the outside of the positive electrode of the battery.
Further, the electronic switch module is a P-type switch tube.
A third aspect of an embodiment of the present application provides a battery state detection apparatus, including:
a battery;
the electronic switch module comprises an input end, a control end and an output end;
short-circuiting the conductive member; and
a battery state detection module;
the short circuit conductive piece is arranged at an interval with the positive pole of the battery, the distance between the short circuit conductive piece and the positive pole of the battery is smaller than a set close-range threshold value, the positive pole of the battery is connected with the control end of the electronic switch module, the short circuit conductive piece is connected with the input end of the electronic switch module, the output end of the electronic switch module is connected with the battery state detection module, and the battery state detection module is used for judging the battery state according to an electric signal output by the output end of the electronic switch module.
Further, the short circuit conductive member is a U-shaped sheet structure surrounding the outside of the positive electrode of the battery.
Further, the electronic switch module is an N-type switch tube.
A fourth aspect of an embodiment of the present application provides an audio playback device, including:
an audio playing device body; and
the battery power supply device is arranged on the audio playing equipment body and provided as the first aspect of the embodiment of the application.
Compared with the prior art, the embodiment of the application has the advantages that: when the battery is normal, the positive electrode of the battery and the short-circuit conductive piece are arranged at intervals, and the short-circuit conductive piece has no positive electrode voltage signal of the battery; when the battery leaks or the anode of the battery enters water, the leakage and the water are both conductors, so that the anode of the battery and the short-circuit conductive piece are connected due to the leakage or the water, namely, a short circuit occurs, and then the short-circuit conductive piece has an anode voltage signal of the battery. Therefore, whether the short-circuit conductive piece has the voltage signal of the positive electrode of the battery or not means whether the battery leaks or the positive electrode of the battery enters water or not, and whether the voltage signal exists in the power supply interface or not can be achieved by controlling the on-off state of the electronic switch module. Therefore, the battery power supply device can normally supply power when the battery is normal, and the power supply is cut off when the battery leaks or the anode of the battery enters water under the condition that the current is not increased, so that the active power supply control is realized according to the situation whether the battery leaks or enters water, and the use safety of the battery is improved.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required to be used in the description of the embodiments or the prior art will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without inventive labor.
Fig. 1 is a schematic circuit diagram of a first circuit structure of a battery power supply device according to an embodiment of the present disclosure;
fig. 2 is a schematic circuit diagram of a second circuit structure of a battery-powered device according to an embodiment of the present disclosure;
fig. 3 is a schematic diagram of a first circuit structure of a battery status detection apparatus according to a second embodiment of the present application;
fig. 4 is a schematic diagram of a second circuit structure of the battery status detection apparatus according to the second embodiment of the present application;
fig. 5 is a schematic diagram of a first circuit structure of a battery status detection apparatus according to a third embodiment of the present application;
fig. 6 is a schematic circuit diagram of a second circuit structure of a battery status detection apparatus according to a third embodiment of the present application.
Detailed Description
In the following description, for purposes of explanation and not limitation, specific details are set forth, such as particular system structures, techniques, etc. in order to provide a thorough understanding of the embodiments of the present application. It will be apparent, however, to one skilled in the art that the present application may be practiced in other embodiments that depart from these specific details. In other instances, detailed descriptions of well-known systems, devices, circuits, and methods are omitted so as not to obscure the description of the present application with unnecessary detail.
It will be understood that the terms "comprises" and/or "comprising," when used in this specification and the appended claims, specify the presence of stated features, integers, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and/or groups thereof.
It is also to be understood that the terminology used in the description of the present application herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. As used in the specification of the present application and the appended claims, the singular forms "a," "an," and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise.
In order to explain the technical means described in the present application, the following description will be given by way of specific embodiments.
Fig. 1 is a schematic diagram of a first circuit structure of a battery power supply device according to an embodiment of the present application. For convenience of explanation, only portions related to the embodiments of the present application are shown. The battery power supply includes a battery 101, an electronic switch module 102, a short circuit conductor 103, and a power supply interface 104. The battery 101 may be a conventional dry battery or a storage battery such as a lithium battery, and the battery 101 may be a single battery or a battery assembly composed of single batteries, and when the battery 101 is a battery assembly composed of single batteries, the positive electrode of the battery 101 in the following description is the positive electrode of any one single battery in the battery assembly or the positive electrode of the battery assembly as a whole. The electronic switch module 102 includes an input terminal, a control terminal, and an output terminal, and the electronic switch module 102 may be a switch (such as a fet or other types of switch), or a combination of a switch and other devices, such as a combination of a switch and a resistor, where the switch is specifically a P-type switch. The power interface 104 is the power output of the battery powered device.
The short-circuit conductive member 103 is a conductive structure made of a conductive material, such as metal: iron, copper, and the like. The short circuit conductive member 103 is spaced apart from the positive electrode of the battery 101, and the distance between the short circuit conductive member 103 and the positive electrode of the battery 101 is smaller than a set short distance threshold. That is, the short-circuit conductive device 103 is disposed on the positive electrode side of the battery 101, and disposed beside the positive electrode of the battery 101, either on both sides or on the upper side, and the setting of the short-distance threshold is intended to illustrate that the distance between the short-circuit conductive device 103 and the positive electrode of the battery 101 is small, and the close arrangement facilitates power supply control. And the specific value of the short distance threshold is set according to actual needs, that is, the distance between the short circuit conductive member 103 and the positive electrode of the battery 101 is set according to actual needs. Further, the structure of the short-circuiting conductive member 103 is not exclusive and may be a conductive sheet or a conductive block. The short-circuiting conductive member 103 may be fixed to the positive electrode of the battery 101 without a support structure, such as: the short circuit conductive member 103 is directly fixed to the battery 101, and the short circuit conductive member 103 may be fixed to the positive electrode of the battery 101 through a support structure. Of course, whether a support structure is required depends on the specific structure of the shorted conductors 103.
The short-circuit conductive piece 103 is connected with the control end of the electronic switch module 102, the positive electrode of the battery 101 is connected with the input end of the electronic switch module 102, and the output end of the electronic switch module 102 is connected with the power supply interface 104.
When the battery 101 is normal, the short-circuit conductive device 103 does not have a positive voltage signal of the battery 101 due to the distance between the positive electrode of the battery 101 and the short-circuit conductive device 103. When the battery 101 leaks or the positive electrode is filled with water, since both the leakage and the water are conductors, a short circuit occurs between the positive electrode of the battery 101 and the short-circuit conductive piece 103 due to the leakage or the water, that is, the positive electrode of the battery 101 and the short-circuit conductive piece 103 are connected, and then the short-circuit conductive piece 103 has a voltage signal of the positive electrode of the battery. When the short-circuit conductive piece 103 has no positive voltage signal of the battery 101, the electronic switch module 102 is controlled to be switched on, and the positive voltage signal of the battery 101 is supplied to the power supply interface 104 through the electronic switch module 102, so that power supply is realized. When the short-circuit conductive piece 103 has the positive voltage signal of the battery 101, the electronic switch module 102 is controlled to be switched off, and the positive voltage signal of the battery 101 is not supplied to the power supply interface 104 through the electronic switch module 102, so that power failure is realized.
Therefore, the battery power supply device can normally supply power when the battery 101 is normal, and the power supply is cut off when the battery 101 leaks or the anode enters water, so that the active power supply control is realized according to the leakage or the water inlet, and the use safety of the battery 101 is improved.
Fig. 2 is a schematic diagram of a second circuit structure of the battery power supply device according to an embodiment of the present application. For convenience of explanation, only portions related to the embodiments of the present application are shown.
The battery powered device includes a battery, an electronic switching module 202, a short circuit conductor 203, and a power interface 204. The battery may be a conventional dry battery, or a storage battery such as a lithium battery, and the battery may be a single battery, or a battery assembly including single batteries, and when the battery is an assembly including single batteries, the positive electrode of the battery in the following description is the positive electrode of any one single battery in the battery assembly, or the positive electrode of the battery assembly as a whole. Generally, the positive electrode of the battery is provided with a positive electrode contact spring, which is referred to as a positive electrode spring for short, so that the positive electrode spring 201 in fig. 2 is equivalent to the positive electrode of the battery, and the positive electrode spring 201 has a conventional structure, and thus the description of this embodiment is omitted.
The electronic switch module 202 includes an input terminal, a control terminal, and an output terminal, and in one embodiment, the electronic switch module 202 is a P-type switch transistor, and further is a P-type field effect transistor, so that the input terminal of the electronic switch module 202 is a source electrode of the P-type field effect transistor, the control terminal of the electronic switch module 202 is a gate electrode of the P-type field effect transistor, and the output terminal of the electronic switch module 202 is a drain electrode of the P-type field effect transistor.
Since the positive electrode of the battery is identical to the positive electrode spring sheet 201, the structural relationship between the short-circuit conductive member 203 and the positive electrode spring sheet 201 is the structural relationship between the short-circuit conductive member 203 and the positive electrode of the battery. The short-circuit conductive member 203 is a conductive structure made of a conductive material, such as metal: iron, copper, and the like. The short-circuit conductive piece 203 and the positive spring piece 201 are arranged at intervals, and the distance between the short-circuit conductive piece 203 and the positive spring piece 201 is smaller than a set close-distance threshold value. That is, the short-circuit conductive device 203 is disposed on the positive side of the battery, and disposed beside the positive electrode of the battery, either on both sides or on the upper side, and the setting of the short-distance threshold is to illustrate that the distance between the short-circuit conductive device 203 and the positive elastic sheet 201 is small, and the close arrangement is convenient for power supply control. The specific value of the short-distance threshold is set according to actual needs, that is, the distance between the short-circuit conductive piece 203 and the positive spring piece 201 is set according to actual needs. Moreover, as shown in fig. 2, a specific structural form of the short-circuit conductive piece 203 is a U-shaped sheet structure surrounding the outer side of the positive electrode elastic piece 201, and it can be seen from this structure that three sides of the outer side of the positive electrode elastic piece 201 are arranged at intervals corresponding to the short-circuit conductive piece 203, so that the reliability and accuracy of power supply control can be improved.
The short-circuit conductive member 203 may not be fixed beside the positive electrode spring sheet 201 through a support structure, such as: the short-circuit conductive piece 203 is directly fixed on the battery, so that the short-circuit conductive piece 203 is fixed beside the positive elastic piece 201; the short-circuit conductive piece 203 can also be fixed beside the positive elastic piece 201 through a supporting structure.
The power supply interface 204 is a power output terminal of the battery power supply device. The power supply interface 204 is provided with a ground terminal for power supply safety, but the ground terminal may not be provided.
The short-circuit conductive piece 203 is connected with the control end of the electronic switch module 202, the positive elastic piece 201 is connected with the input end of the electronic switch module 202, and the output end of the electronic switch module 202 is connected with the power supply interface 204. And, the control terminal of the electronic switch module 202 is grounded through the pull-down resistor 205. That is, the gate of the pfet is grounded through the pull-down resistor 205, the source is connected to the positive spring 201, and the drain is connected to the power supply interface 204. Then, when the source of the P-type fet has the voltage of the positive electrode of the battery and the voltage of the gate of the P-type fet is 0, the voltage difference between the gate and the source exceeds the turn-on voltage (generally 0.4V) of the P-type fet, and the P-type fet is turned on; when the source electrode of the P-type field effect transistor has the voltage of the positive electrode of the battery and the grid electrode of the P-type field effect transistor also has the voltage of the positive electrode of the battery, the voltage difference between the grid electrode and the source electrode is smaller than the conduction voltage of the P-type field effect transistor, and the P-type field effect transistor is cut off, so that the purpose of cutting off the output is achieved. In addition, the control sensitivity may be set by adjusting the resistance value of the pull-down resistor 205, and of course, the pull-down resistor 205 may not be set.
When the battery is normal, the distance exists between the positive electrode spring sheet 201 and the short-circuit conductive piece 203, and the short-circuit conductive piece 203 does not have a positive electrode voltage signal of the battery. When the battery leaks or the anode enters water, the leakage and the water are both conductors, so that a short circuit occurs between the anode elastic sheet 201 and the short-circuit conductive piece 203 due to the leakage or the water, the anode elastic sheet 201 and the short-circuit conductive piece 203 are connected, namely the anode of the battery and the short-circuit conductive piece 203 are connected, and then the short-circuit conductive piece 203 has an anode voltage signal of the battery. When the short-circuit conductive piece 203 has no positive voltage signal of the battery, the electronic switch module 202 is controlled to be switched on, and the positive voltage signal of the battery is supplied to the power supply interface 204 through the electronic switch module 202, so that power supply is realized. When the short-circuit conductive piece 203 has the positive voltage signal of the battery, the electronic switch module 202 is controlled to be switched off, and the positive voltage signal of the battery cannot be supplied to the power supply interface 204 through the electronic switch module 202, so that the power failure is realized.
Therefore, the battery power supply device can normally supply power when the battery is normal, and the power supply is cut off when the battery leaks or the anode enters water, so that the active power supply control is realized according to the situation whether the battery leaks or enters the water, and the use safety of the battery is improved.
Fig. 3 is a schematic diagram of a first circuit structure of the battery state detection apparatus according to the second embodiment of the present application. For convenience of explanation, only portions related to the embodiments of the present application are shown. The battery state detection device includes a battery 301, an electronic switching module 302, a short circuit conductor 303, and a battery state detection module 304. The battery 301 may be a conventional dry battery or a storage battery such as a lithium battery, and the battery 301 may be a single battery or a battery assembly composed of single batteries, and when the battery 301 is a battery assembly composed of single batteries, the positive electrode of the battery 301 in the following description is the positive electrode of any one single battery in the battery assembly or the positive electrode of the battery assembly as a whole. The electronic switch module 302 includes an input terminal, a control terminal, and an output terminal, and the electronic switch module 302 may be a switch (such as a fet or other types of switch), or a combination of a switch and other devices, such as a combination of a switch and a resistor, where the switch is specifically a P-type switch. The battery state detection module 304 is configured to determine the state of the battery 301 according to the received signal, where the battery state detection module 304 may be a hardware circuit or a device, such as a device (e.g., a voltmeter) for displaying the received electrical signal or a device (e.g., an audible and visual alarm) for outputting the received electrical signal in a certain manner, and of course, the battery state detection module 304 may also be a processing chip such as a single chip, and determine the state of the battery 301 through an internal software program, and output the state to an external related device.
The short circuit conductive member 303 is a conductive structure made of a conductive material, such as metal: iron, copper, and the like. Short-circuit conductive piece 303 is spaced from the positive electrode of battery 301, and the distance between short-circuit conductive piece 303 and the positive electrode of battery 301 is smaller than the set close distance threshold. That is, the short-circuit conductive member 303 is disposed on the positive electrode side of the battery 301, and disposed beside the positive electrode of the battery 301, either on both sides or on the upper side, and the setting of the short-distance threshold is intended to illustrate that the distance between the short-circuit conductive member 303 and the positive electrode of the battery 301 is small, and the close arrangement is convenient for control. The specific value of the short-distance threshold is set according to actual needs, that is, the distance between the short-circuit conductive member 303 and the positive electrode of the battery 301 is set according to actual needs. Furthermore, the structure of the short-circuit conductive member 303 is not exclusive, and may be a conductive sheet or a conductive block. The short circuit conductor 303 may not be secured to the positive electrode of the battery 301 by a support structure, such as: the short circuit conductive member 303 is directly fixed to the battery 301, and the short circuit conductive member 303 may be fixed to the positive electrode of the battery 301 through a support structure. Of course, whether support structures are required depends on the particular configuration of the shorted conductive elements 303.
The short circuit conductor 303 is connected to the control terminal of the electronic switch module 302, the positive terminal of the battery 301 is connected to the input terminal of the electronic switch module 302, and the output terminal of the electronic switch module 302 is connected to the battery state detection module 304.
When the battery 301 is normal, the short-circuit conductive member 303 does not have a positive voltage signal of the battery 301 due to a distance between the positive electrode of the battery 301 and the short-circuit conductive member 303. When the battery 301 leaks or the positive electrode is filled with water, since both the leakage and the water are conductors, a short circuit occurs between the positive electrode of the battery 301 and the short-circuit conductive member 303 due to the leakage or the water, that is, the positive electrode of the battery 301 and the short-circuit conductive member 303 are connected, and then the short-circuit conductive member 303 has a positive electrode voltage signal of the battery. When the short-circuit conductive piece 303 has no positive voltage signal of the battery 301, the electronic switch module 302 is controlled to be switched on, the positive voltage signal of the battery 301 is sent to the battery state detection module 304 through the electronic switch module 302, and the battery state detection module 304 judges that the battery 301 is normal. When the short-circuit conductive piece 303 has a voltage signal of the positive electrode of the battery 301, the electronic switch module 302 is controlled to be turned off, the voltage signal of the positive electrode of the battery 301 is not sent to the battery state detection module 304 through the electronic switch module 302, and the battery state detection module 304 determines that the battery 301 is abnormal, namely, leakage or water inflow of the positive electrode.
Therefore, the battery state detection device can detect the state of the battery 301, realize active detection on leakage or water inflow, and improve the use safety of the battery 301.
Fig. 4 is a schematic diagram of a second circuit structure of the battery state detection apparatus according to the second embodiment of the present application. For convenience of explanation, only portions related to the embodiments of the present application are shown.
The battery condition detection means includes a battery, an electronic switching module 402, a short circuit conductor 403, and a battery condition detection module 404. The battery may be a conventional dry battery, or a storage battery such as a lithium battery, and the battery may be a single battery, or a battery assembly including single batteries, and when the battery is an assembly including single batteries, the positive electrode of the battery in the following description is the positive electrode of any one single battery in the battery assembly, or the positive electrode of the battery assembly as a whole. Generally, the positive electrode of the battery is provided with a positive electrode contact spring, which is referred to as a positive electrode spring for short, so the positive electrode spring 401 in fig. 4 is equivalent to the positive electrode of the battery, and the positive electrode spring 401 has a conventional structure, and thus the description of this embodiment is omitted.
The electronic switch module 402 includes an input terminal, a control terminal, and an output terminal, and in one embodiment, the electronic switch module 402 is a P-type switch transistor, and further is a P-type field effect transistor, so that the input terminal of the electronic switch module 402 is a source electrode of the P-type field effect transistor, the control terminal of the electronic switch module 402 is a gate electrode of the P-type field effect transistor, and the output terminal of the electronic switch module 402 is a drain electrode of the P-type field effect transistor.
Since the positive electrode of the battery is identical to the positive electrode spring 401, the structural relationship between the short circuit conductive member 403 and the positive electrode spring 401 is the structural relationship between the short circuit conductive member 403 and the positive electrode of the battery. Short-circuit conductive member 403 is a conductive structure made of conductive material, such as metal: iron, copper, and the like. The short-circuit conductive member 403 and the positive spring plate 401 are disposed at an interval, and a distance between the short-circuit conductive member 403 and the positive spring plate 401 is smaller than a set close-range threshold. That is, short-circuit conductive device 403 is disposed on the positive side of the battery, and disposed beside the positive electrode of the battery, either on both sides or on the upper side, and the short-distance threshold is set to indicate that the distance between short-circuit conductive device 403 and positive electrode spring 401 is small, and the close arrangement is convenient for control. The specific value of the short-distance threshold is set according to actual needs, that is, the distance between the short-circuit conductive piece 403 and the positive electrode elastic piece 401 is set according to actual needs. Moreover, as shown in fig. 4, a specific structural form of the short-circuit conductive member 403 is a U-shaped sheet structure surrounding the outer side of the positive electrode elastic sheet 401, and it can be seen from this structure that three sides of the outer side of the positive electrode elastic sheet 401 are spaced from the short-circuit conductive member 403, so that the reliability and accuracy of power supply control can be improved.
The short-circuit conductive member 403 may not be fixed beside the positive electrode spring 401 through a support structure, such as: the short circuit conductive piece 403 is directly fixed on the battery, so that the short circuit conductive piece 403 is fixed beside the positive elastic piece 401; the short-circuit conductive member 403 may also be fixed beside the positive electrode spring plate 401 through a support structure.
The battery state detection module 404 is configured to determine a state of the battery according to the received signal, where the battery state detection module 404 may be a hardware circuit or a device, such as a device (e.g., a voltmeter) for displaying the received electrical signal or a device (e.g., an audible and visual alarm) for outputting the received electrical signal in a certain manner, and of course, the battery state detection module 404 may also be a processing chip such as a single chip, and determines the state of the battery through an internal software program and outputs the state to an external related device.
The short-circuit conductive piece 403 is connected to the control end of the electronic switch module 402, the positive elastic piece 401 is connected to the input end of the electronic switch module 402, and the output end of the electronic switch module 402 is connected to the battery state detection module 404. And, the control terminal of the electronic switch module 402 is grounded through a pull-down resistor 405. That is, the gate of the pfet is grounded through the pull-down resistor 405, the source is connected to the positive spring 401, and the drain is connected to the battery status detection module 404. Then, when the source of the P-type fet has the voltage of the positive electrode of the battery and the voltage of the gate of the P-type fet is 0, the voltage difference between the gate and the source exceeds the turn-on voltage (generally 0.4V) of the P-type fet, and the P-type fet is turned on; when the source electrode of the P-type field effect transistor has the voltage of the positive electrode of the battery and the grid electrode of the P-type field effect transistor also has the voltage of the positive electrode of the battery, the voltage difference between the grid electrode and the source electrode is smaller than the conduction voltage of the P-type field effect transistor, and the P-type field effect transistor is cut off, so that the purpose of cutting off the output is achieved. In addition, the control sensitivity may be set by adjusting the resistance value of the pull-down resistor 405, and of course, the pull-down resistor 405 may not be set.
When the battery is normal, the short-circuit conductive device 403 has no positive voltage signal of the battery due to the distance between the positive spring plate 401 and the short-circuit conductive device 403. When the battery leaks or the anode enters water, since the leakage and the water are both conductors, a short circuit occurs between the anode elastic sheet 401 and the short circuit conductive piece 403 due to the leakage or the water, the anode elastic sheet 401 and the short circuit conductive piece 403 are connected, that is, the anode of the battery and the short circuit conductive piece 403 are connected, and then the short circuit conductive piece 403 has an anode voltage signal of the battery. When the short-circuit conductive piece 403 has no positive voltage signal of the battery, the electronic switch module 402 is controlled to be turned on, the positive voltage signal of the battery is sent to the battery state detection module 404 through the electronic switch module 402, and the battery state detection module 404 determines that the battery is normal. When the short-circuit conductive piece 403 has a voltage signal of the positive electrode of the battery, the electronic switch module 402 is controlled to be turned off, the voltage signal of the positive electrode of the battery is not sent to the battery state detection module 404 through the electronic switch module 402, and the battery state detection module 404 determines that the battery is abnormal, namely, leakage or water inflow of the positive electrode.
Therefore, the battery state detection device can detect the state of the battery, realize whether the active detection leaks or intakes, and improve the use safety of the battery.
Fig. 5 is a schematic diagram of a first circuit structure of a battery state detection device according to a third embodiment of the present application. For convenience of explanation, only portions related to the embodiments of the present application are shown. The battery state detection device includes a battery 501, an electronic switching module 502, a short-circuit conductive member 503, and a battery state detection module 504. The battery 501 may be a conventional dry battery or a storage battery such as a lithium battery, and the battery 501 may be a single battery or a battery assembly composed of single batteries, and when the battery 501 is a battery assembly composed of single batteries, the positive electrode of the battery 501 in the following description is the positive electrode of any one single battery in the battery assembly or the positive electrode of the battery assembly as a whole. The electronic switch module 502 includes an input terminal, a control terminal, and an output terminal, and the electronic switch module 502 may be a switch (e.g. a fet or other type of switch), or a combination of a switch and other devices, such as a combination of a switch and a resistor, where the switch is specifically an N-type switch. The battery state detection module 504 is configured to determine the state of the battery 501 according to the received signal, where the battery state detection module 504 may be a hardware circuit or a device, such as a device (e.g., a voltmeter) for displaying the received electrical signal or a device (e.g., an audible and visual alarm) for outputting the received electrical signal in a certain manner, and of course, the battery state detection module 504 may also be a processing chip such as a single chip, and determines the state of the battery 501 through an internal software program and outputs the state to an external related device.
The short-circuit conductive member 503 is a conductive structure made of a conductive material, such as metal: iron, copper, and the like. The short-circuit conductive piece 503 is spaced from the positive electrode of the battery 501, and the distance between the short-circuit conductive piece 503 and the positive electrode of the battery 501 is smaller than a set close distance threshold value. That is, the short-circuit conductive member 503 is disposed on the positive electrode side of the battery 501, and disposed beside the positive electrode of the battery 501, either on both sides or on the upper side, and the setting of the short-distance threshold is to illustrate that the distance between the short-circuit conductive member 503 and the positive electrode of the battery 501 is small, and the close arrangement is convenient for control. The specific value of the close distance threshold is set according to actual needs, that is, the distance between the short circuit conductive member 503 and the positive electrode of the battery 501 is set according to actual needs. Moreover, the structure of the short-circuit conductive member 503 is not exclusive and may be a conductive sheet or a conductive block. The short-circuiting conductive member 503 may not be fixed to the positive electrode of the battery 501 by a support structure, such as: the short-circuit conductive member 503 is directly fixed on the battery 501, and the short-circuit conductive member 503 may also be fixed near the positive electrode of the battery 501 through a supporting structure. Of course, whether a support structure is required depends on the specific structure of the shorting conductor 503.
The positive electrode of the battery 501 is connected to the control terminal of the electronic switch module 502, the short-circuit conductive member 503 is connected to the input terminal of the electronic switch module 502, and the output terminal of the electronic switch module 502 is connected to the battery state detection module 504.
The battery 501 provides a positive voltage signal to the control terminal of the electronic switch module 502, and the control terminal of the electronic switch module 502 is in a conducting state. When the battery 501 is normal, the short-circuit conductive member 503 has no voltage signal of the positive electrode of the battery 501 because there is a distance between the positive electrode of the battery 501 and the short-circuit conductive member 503. When the battery 501 leaks or the positive electrode is filled with water, the leakage and the water are both conductors, and thus, a short circuit occurs between the positive electrode of the battery 501 and the short-circuit conductive member 503 due to the leakage or the water, that is, the positive electrode of the battery 501 is connected with the short-circuit conductive member 503, and then the short-circuit conductive member 503 has a positive electrode voltage signal of the battery. When the short-circuit conductive member 503 has no voltage signal of the positive electrode of the battery 501, the voltage signal of the positive electrode of the battery 501 is not provided to the battery state detection module 504 through the electronic switch module 502, and the battery state detection module 504 determines that the battery 501 is normal. When the short-circuit conductive member 503 has a positive voltage signal of the battery 501, the positive voltage signal of the battery 501 is sent to the battery state detection module 504 through the electronic switch module 502, and the battery state detection module 504 determines that the battery 501 is abnormal, i.e. leakage or positive water inflow.
Therefore, the battery state detection device can detect the state of the battery 501, realize active detection on leakage or water inflow, and improve the use safety of the battery 501.
Fig. 6 is a schematic diagram of a second circuit structure of the battery state detection apparatus according to the third embodiment of the present application. For convenience of explanation, only portions related to the embodiments of the present application are shown.
The battery condition detection means includes a battery, an electronic switch module 602, a short circuit conductor 603, and a battery condition detection module 604. The battery may be a conventional dry battery, or a storage battery such as a lithium battery, and the battery may be a single battery, or a battery assembly including single batteries, and when the battery is an assembly including single batteries, the positive electrode of the battery in the following description is the positive electrode of any one single battery in the battery assembly, or the positive electrode of the battery assembly as a whole. Generally, the positive electrode of the battery is provided with a positive electrode contact spring, which is referred to as a positive electrode spring for short, so the positive electrode spring 601 in fig. 6 is equivalent to the positive electrode of the battery, and the description of the embodiment is omitted because the positive electrode spring 601 has a conventional structure.
The electronic switch module 602 includes an input terminal, a control terminal, and an output terminal, and in one embodiment, the electronic switch module 602 is an N-type switch transistor, further an N-type field effect transistor.
Since the positive electrode of the battery is identical to the positive electrode elastic sheet 601, the structural relationship between the short-circuit conductive member 603 and the positive electrode elastic sheet 601 is the structural relationship between the short-circuit conductive member 603 and the positive electrode of the battery. The short-circuit conductive member 603 is a conductive structure made of conductive material, such as metal: iron, copper, and the like. The short circuit conductive member 603 and the positive spring 601 are disposed at an interval, and a distance between the short circuit conductive member 603 and the positive spring 601 is smaller than a set close threshold. That is, the short-circuit conductive element 603 is disposed on the positive side of the battery, and disposed beside the positive electrode of the battery, either on both sides or on the upper side, and the setting of the short-distance threshold is to illustrate that the distance between the short-circuit conductive element 603 and the positive electrode elastic sheet 601 is small, and the close arrangement is convenient for control. The specific value of the short-distance threshold is set according to actual needs, that is, the distance between the short-circuit conductive piece 603 and the positive electrode elastic piece 601 is set according to actual needs. Moreover, as shown in fig. 6, a specific structural form of the short-circuit conductive member 603 is a U-shaped sheet structure surrounding the outer side of the positive electrode elastic sheet 601, and it can be seen from this structure that three sides of the outer side of the positive electrode elastic sheet 601 are spaced from the short-circuit conductive member 603, so that the reliability and accuracy of power supply control can be improved.
The short-circuit conductive member 603 may not be fixed beside the positive electrode elastic sheet 601 through a support structure, such as: the short circuit conductive piece 603 is directly fixed on the battery, so that the short circuit conductive piece 603 is fixed beside the positive elastic piece 601; the short circuit conductive member 603 may also be fixed beside the positive electrode spring 601 through a supporting structure.
The battery status detecting module 604 is configured to determine a status of the battery according to the received signal, where the battery status detecting module 604 may be a hardware circuit or a device, such as a device (e.g., a voltmeter) for displaying the received electrical signal or a device (e.g., an audible and visual alarm) for outputting the received electrical signal in a certain manner, and of course, the battery status detecting module 604 may also be a processing chip such as a single chip, and determine the status of the battery through an internal software program, and output the status to an external related device.
The positive elastic sheet 601 is connected with the control end of the electronic switch module 602, the short circuit conductive piece 603 is connected with the input end of the electronic switch module 602, and the output end of the electronic switch module 602 is connected with the battery state detection module 604. The control terminal of the electronic switch module 602 is grounded through the pull-down resistor 605, but the pull-down resistor 605 may not be provided.
The battery sends a positive voltage signal to the control terminal of the electronic switch module 602 through the positive spring plate 601, and the control terminal of the electronic switch module 602 is in a conducting state. When the battery is normal, the distance exists between the positive electrode elastic sheet 601 and the short-circuit conductive piece 603, and the short-circuit conductive piece 603 does not have a positive electrode voltage signal of the battery. When the battery leaks or the anode enters water, the leakage and the water are both conductors, so that a short circuit occurs between the anode elastic sheet 601 and the short circuit conductive piece 603 due to the leakage or the water, the anode of the battery is connected with the short circuit conductive piece 603, that is, the anode elastic sheet 601 is connected with the short circuit conductive piece 603, and then the short circuit conductive piece 603 has an anode voltage signal of the battery. When the short-circuit conductive element 603 has no voltage signal of the positive electrode of the battery, the voltage signal of the positive electrode of the battery is not sent to the battery state detection module 604 through the electronic switch module 602, and the battery state detection module 604 determines that the battery is normal. When the short-circuit conductive member 603 has a voltage signal of the positive electrode of the battery, the voltage signal of the positive electrode of the battery 601 is sent to the battery state detection module 604 through the electronic switch module 602, and the battery state detection module 604 determines that the battery is abnormal, i.e. leakage or water inflow of the positive electrode.
Therefore, the battery state detection device can detect the state of the battery, realize whether the active detection leaks or intakes, and improve the use safety of the battery.
The fourth embodiment of the present application provides an audio playback device, for example: a sound or a loudspeaker. The audio playing device comprises an audio playing device body and a battery power supply device arranged on the audio playing device body. The audio playing device body belongs to the conventional technology, and details are not repeated in this embodiment. Fig. 1 is a schematic diagram of a circuit structure of the battery-powered device. The battery power supply includes a battery 101, an electronic switch module 102, a short circuit conductor 103, and a power supply interface 104. The battery 101 may be a conventional dry battery or a storage battery such as a lithium battery, and the battery 101 may be a single battery or a battery assembly composed of single batteries, and when the battery 101 is a battery assembly composed of single batteries, the positive electrode of the battery 101 in the following description is the positive electrode of any one single battery in the battery assembly or the positive electrode of the battery assembly as a whole. The electronic switch module 102 includes an input terminal, a control terminal, and an output terminal, and the electronic switch module 102 may be a switch (such as a fet or other types of switch), or a combination of a switch and other devices, such as a combination of a switch and a resistor, where the switch is specifically a P-type switch. The power supply interface 104 is an electric energy output end of the battery power supply device and supplies power to relevant components in the audio playing device.
The short-circuit conductive member 103 is a conductive structure made of a conductive material, such as metal: iron, copper, and the like. The short circuit conductive member 103 is spaced apart from the positive electrode of the battery 101, and the distance between the short circuit conductive member 103 and the positive electrode of the battery 101 is smaller than a set short distance threshold. That is, the short-circuit conductive device 103 is disposed on the positive electrode side of the battery 101, and disposed beside the positive electrode of the battery 101, either on both sides or on the upper side, and the setting of the short-distance threshold is intended to illustrate that the distance between the short-circuit conductive device 103 and the positive electrode of the battery 101 is small, and the close arrangement facilitates power supply control. And the specific value of the short distance threshold is set according to actual needs, that is, the distance between the short circuit conductive member 103 and the positive electrode of the battery 101 is set according to actual needs. Further, the structure of the short-circuiting conductive member 103 is not exclusive and may be a conductive sheet or a conductive block. The short-circuiting conductive member 103 may be fixed to the positive electrode of the battery 101 without a support structure, such as: the short circuit conductive member 103 is directly fixed to the battery 101, and the short circuit conductive member 103 may be fixed to the positive electrode of the battery 101 through a support structure. Of course, whether a support structure is required depends on the specific structure of the shorted conductors 103.
The short-circuit conductive piece 103 is connected with the control end of the electronic switch module 102, the positive electrode of the battery 101 is connected with the input end of the electronic switch module 102, and the output end of the electronic switch module 102 is connected with the power supply interface 104.
When the battery 101 is normal, the short-circuit conductive device 103 does not have a positive voltage signal of the battery 101 due to the distance between the positive electrode of the battery 101 and the short-circuit conductive device 103. When the battery 101 leaks or the positive electrode is filled with water, since both the leakage and the water are conductors, a short circuit occurs between the positive electrode of the battery 101 and the short-circuit conductive piece 103 due to the leakage or the water, that is, the positive electrode of the battery 101 and the short-circuit conductive piece 103 are connected, and then the short-circuit conductive piece 103 has a voltage signal of the positive electrode of the battery. When the short-circuit conductive piece 103 has no positive voltage signal of the battery 101, the electronic switch module 102 is controlled to be switched on, and the positive voltage signal of the battery 101 is supplied to the power supply interface 104 through the electronic switch module 102, so that power supply is realized. When the short-circuit conductive piece 103 has the positive voltage signal of the battery 101, the electronic switch module 102 is controlled to be switched off, and the positive voltage signal of the battery 101 is not supplied to the power supply interface 104 through the electronic switch module 102, so that power failure is realized.
Therefore, the battery power supply device can normally supply power when the battery 101 is normal, and the power supply is cut off when the battery 101 leaks or the anode enters water, so that the active power supply control is realized according to the leakage or the water inlet, and the use safety of the battery 101 is improved.
The fourth embodiment of the present application provides another audio playing device, for example: a sound or a loudspeaker. The audio playing device comprises an audio playing device body and a battery power supply device arranged on the audio playing device body. The audio playing device body belongs to the conventional technology, and details are not repeated in this embodiment. Referring to fig. 2, a battery powered device includes a battery, an electronic switching module 202, a short circuit conductor 203, and a power interface 204. The battery may be a conventional dry battery, or a storage battery such as a lithium battery, and the battery may be a single battery, or a battery assembly including single batteries, and when the battery is an assembly including single batteries, the positive electrode of the battery in the following description is the positive electrode of any one single battery in the battery assembly, or the positive electrode of the battery assembly as a whole. Generally, the positive electrode of the battery is provided with a positive electrode contact spring, which is referred to as a positive electrode spring for short, so that the positive electrode spring 201 in fig. 2 is equivalent to the positive electrode of the battery, and the positive electrode spring 201 has a conventional structure, and thus the description of this embodiment is omitted.
The electronic switch module 202 includes an input terminal, a control terminal, and an output terminal, and in one embodiment, the electronic switch module 202 is a P-type switch transistor, and further is a P-type field effect transistor, so that the input terminal of the electronic switch module 202 is a source electrode of the P-type field effect transistor, the control terminal of the electronic switch module 202 is a gate electrode of the P-type field effect transistor, and the output terminal of the electronic switch module 202 is a drain electrode of the P-type field effect transistor.
Since the positive electrode of the battery is identical to the positive electrode spring sheet 201, the structural relationship between the short-circuit conductive member 203 and the positive electrode spring sheet 201 is the structural relationship between the short-circuit conductive member 203 and the positive electrode of the battery. The short-circuit conductive member 203 is a conductive structure made of a conductive material, such as metal: iron, copper, and the like. The short-circuit conductive piece 203 and the positive spring piece 201 are arranged at intervals, and the distance between the short-circuit conductive piece 203 and the positive spring piece 201 is smaller than a set close-distance threshold value. That is, the short-circuit conductive device 203 is disposed on the positive side of the battery, and disposed beside the positive electrode of the battery, either on both sides or on the upper side, and the setting of the short-distance threshold is to illustrate that the distance between the short-circuit conductive device 203 and the positive elastic sheet 201 is small, and the close arrangement is convenient for power supply control. The specific value of the short-distance threshold is set according to actual needs, that is, the distance between the short-circuit conductive piece 203 and the positive spring piece 201 is set according to actual needs. Moreover, as shown in fig. 2, a specific structural form of the short-circuit conductive piece 203 is a U-shaped sheet structure surrounding the outer side of the positive electrode elastic piece 201, and it can be seen from this structure that three sides of the outer side of the positive electrode elastic piece 201 are arranged at intervals corresponding to the short-circuit conductive piece 203, so that the reliability and accuracy of power supply control can be improved.
The short-circuit conductive member 203 may not be fixed beside the positive electrode spring sheet 201 through a support structure, such as: the short-circuit conductive piece 203 is directly fixed on the battery, so that the short-circuit conductive piece 203 is fixed beside the positive elastic piece 201; the short-circuit conductive piece 203 can also be fixed beside the positive elastic piece 201 through a supporting structure.
The power supply interface 204 is an electric energy output end of the battery power supply device, and is used for supplying power to relevant components in the audio playing device. The power supply interface 204 is provided with a ground terminal for power supply safety, but the ground terminal may not be provided.
The short-circuit conductive piece 203 is connected with the control end of the electronic switch module 202, the positive elastic piece 201 is connected with the input end of the electronic switch module 202, and the output end of the electronic switch module 202 is connected with the power supply interface 204. And, the control terminal of the electronic switch module 202 is grounded through the pull-down resistor 205. That is, the gate of the pfet is grounded through the pull-down resistor 205, the source is connected to the positive spring 201, and the drain is connected to the power supply interface 204. Then, when the source of the P-type fet has the voltage of the positive electrode of the battery and the voltage of the gate of the P-type fet is 0, the voltage difference between the gate and the source exceeds the turn-on voltage (generally 0.4V) of the P-type fet, and the P-type fet is turned on; when the source electrode of the P-type field effect transistor has the voltage of the positive electrode of the battery and the grid electrode of the P-type field effect transistor also has the voltage of the positive electrode of the battery, the voltage difference between the grid electrode and the source electrode is smaller than the conduction voltage of the P-type field effect transistor, and the P-type field effect transistor is cut off, so that the purpose of cutting off the output is achieved. In addition, the control sensitivity may be set by adjusting the resistance value of the pull-down resistor 205, and of course, the pull-down resistor 205 may not be set.
When the battery is normal, the distance exists between the positive electrode spring sheet 201 and the short-circuit conductive piece 203, and the short-circuit conductive piece 203 does not have a positive electrode voltage signal of the battery. When the battery leaks or the anode enters water, the leakage and the water are both conductors, so that a short circuit occurs between the anode elastic sheet 201 and the short-circuit conductive piece 203 due to the leakage or the water, the anode elastic sheet 201 and the short-circuit conductive piece 203 are connected, namely the anode of the battery and the short-circuit conductive piece 203 are connected, and then the short-circuit conductive piece 203 has an anode voltage signal of the battery. When the short-circuit conductive piece 203 has no positive voltage signal of the battery, the electronic switch module 202 is controlled to be switched on, and the positive voltage signal of the battery is supplied to the power supply interface 204 through the electronic switch module 202, so that power supply is realized. When the short-circuit conductive piece 203 has the positive voltage signal of the battery, the electronic switch module 202 is controlled to be switched off, and the positive voltage signal of the battery cannot be supplied to the power supply interface 204 through the electronic switch module 202, so that the power failure is realized.
Therefore, the battery power supply device can normally supply power when the battery is normal, and the power supply is cut off when the battery leaks or the anode enters water, so that the active power supply control is realized according to the situation whether the battery leaks or enters the water, and the use safety of the battery is improved.
The above embodiments are only used for illustrating the technical solutions of the present application, and not for limiting the same; although the present application has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may be modified or some technical features may be equivalently replaced; such modifications and substitutions do not substantially depart from the spirit and scope of the embodiments of the present application and are intended to be included within the scope of the present application.
Claims (10)
1. A battery powered device, comprising:
a battery;
the electronic switch module comprises an input end, a control end and an output end;
short-circuiting the conductive member; and
a power supply interface;
the short circuit conductive piece is arranged at an interval with the positive pole of the battery, the distance between the short circuit conductive piece and the positive pole of the battery is smaller than a set close-range threshold value, the short circuit conductive piece is connected with the control end of the electronic switch module, the positive pole of the battery is connected with the input end of the electronic switch module, and the output end of the electronic switch module is connected with the power supply interface.
2. The battery-powered device of claim 1, wherein the shorting conductive member is a U-shaped sheet structure that surrounds the outside of the positive electrode of the battery.
3. The battery-powered device of claim 1 or 2, wherein the electronic switching module is a P-type switching tube.
4. A battery state detection device, comprising:
a battery;
the electronic switch module comprises an input end, a control end and an output end;
short-circuiting the conductive member; and
a battery state detection module;
the short circuit conductive piece is arranged at an interval with the positive pole of the battery, the distance between the short circuit conductive piece and the positive pole of the battery is smaller than a set close-range threshold value, the short circuit conductive piece is connected with the control end of the electronic switch module, the positive pole of the battery is connected with the input end of the electronic switch module, the output end of the electronic switch module is connected with the battery state detection module, and the battery state detection module is used for judging the battery state according to an electric signal output by the output end of the electronic switch module.
5. The battery state detection device of claim 4, wherein the short circuit conductive member is a U-shaped sheet structure surrounding the outside of the positive electrode of the battery.
6. The battery state detection device according to claim 4 or 5, wherein the electronic switch module is a P-type switch tube.
7. A battery state detection device, comprising:
a battery;
the electronic switch module comprises an input end, a control end and an output end;
short-circuiting the conductive member; and
a battery state detection module;
the short circuit conductive piece is arranged at an interval with the positive pole of the battery, the distance between the short circuit conductive piece and the positive pole of the battery is smaller than a set close-range threshold value, the positive pole of the battery is connected with the control end of the electronic switch module, the short circuit conductive piece is connected with the input end of the electronic switch module, the output end of the electronic switch module is connected with the battery state detection module, and the battery state detection module is used for judging the battery state according to an electric signal output by the output end of the electronic switch module.
8. The battery state detection device of claim 7, wherein the short circuit conductive member is a U-shaped sheet structure surrounding the outside of the positive electrode of the battery.
9. The battery state detection device according to claim 7 or 8, wherein the electronic switch module is an N-type switch tube.
10. An audio playback device, comprising:
an audio playing device body; and
the battery power supply device of any one of claims 1 to 3, disposed on an audio playing device body.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921275826.3U CN210273534U (en) | 2019-08-06 | 2019-08-06 | Battery power supply device, battery state detection device and audio playing equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921275826.3U CN210273534U (en) | 2019-08-06 | 2019-08-06 | Battery power supply device, battery state detection device and audio playing equipment |
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| Publication Number | Publication Date |
|---|---|
| CN210273534U true CN210273534U (en) | 2020-04-07 |
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|---|---|---|---|
| CN201921275826.3U Active CN210273534U (en) | 2019-08-06 | 2019-08-06 | Battery power supply device, battery state detection device and audio playing equipment |
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| Country | Link |
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| CN (1) | CN210273534U (en) |
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- 2019-08-06 CN CN201921275826.3U patent/CN210273534U/en active Active
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