Battery reverse connection protection circuit and device

Abstract

The utility model discloses a battery reverse connection protection circuit and device. According to the battery reverse connection protection circuit, the voltage stabilizing element is connected between the positive electrode connecting end and the negative electrode connecting end, so that when the output voltage of the battery is within the reference voltage range corresponding to the voltage stabilizing element, the reverse control module can work normally; when current passes through the voltage stabilizing element, voltage with a stable value can be generated, so that the reverse control module can work under the voltage with the stable value regardless of the value of the output voltage of the battery, the reverse connection protection function for the wide-range battery voltage is realized on the basis of a single element, and the cost of the protection circuit is reduced.

Description

Technical Field

[0001] The embodiments of the present application relate to battery technology, and relate to but are not limited to a battery reverse connection protection circuit and device. Background Art

[0002] In the battery testing process, it is common for the battery testing equipment to be connected to the battery in reverse. Reverse battery connection can damage the battery, and in severe cases can cause major accidents and safety hazards such as fire and injury to testers.

[0003] Conventional protection circuits are divided into different ranges according to the battery voltage, or multiple modules are made to be suitable for various ranges. Since the circuit needs to be divided into multiple different processing units according to different ranges, the circuit is complex and costly. Utility Model Content

[0004] In view of this, the battery reverse connection protection circuit and device provided in the embodiments of the present application can realize the reverse connection protection function of a wide range of battery voltage with a single component, thereby reducing the cost of the protection circuit.

[0005] In a first aspect, an embodiment of the present application provides a battery reverse connection protection circuit, the circuit comprising a positive electrode connection terminal, a negative electrode connection terminal and a reverse control module, the first input terminal of the reverse control module is connected to the negative electrode connection terminal, the second input terminal of the reverse control module is connected to the positive electrode connection terminal, wherein:

[0006] When the positive electrode of the battery is connected to the positive electrode connection terminal, the reverse control module is in a non-working state;

[0007] When the positive electrode of the battery is connected to the negative electrode connection terminal, the reverse control module is in a working state and outputs a reverse connection alarm signal, wherein the reverse connection alarm signal indicates that the battery is in a reverse connection state;

[0008] Wherein, the reverse control module includes a voltage stabilizing element, which is connected between the positive electrode connection terminal and the negative electrode connection terminal to control the reverse control module to be in the working state when the output voltage of the battery is within a reference voltage range, and the reference voltage range corresponds to the voltage stabilizing element.

[0009] In one embodiment, the reverse control module further includes a photoelectric coupling unit, the positive terminal of the photoelectric coupling unit is connected to the negative connection terminal, the negative terminal of the photoelectric coupling unit is connected to the positive connection terminal, and the voltage stabilizing element is connected in parallel with the photoelectric coupling unit, wherein:

[0010] When the positive electrode of the battery is connected to the negative electrode connection terminal, the voltage stabilizing element controls the photoelectric coupling unit to be in a working state when the output voltage of the battery is within the reference voltage range, and the photoelectric coupling unit sends the reverse connection alarm signal to the controller.

[0011] In one of the embodiments, the reverse control module also includes a unidirectional conductive unit, the negative pole of the unidirectional conductive unit is connected to the positive pole connection end, and the positive pole of the unidirectional conductive unit is connected to the negative end of the photoelectric coupling unit, so as to block the current flow between the battery and the photoelectric coupling unit when the positive pole of the battery is connected to the positive pole connection end, so that the photoelectric coupling unit and the voltage stabilizing element are both in a non-working state.

[0012] In one embodiment, the number of the one-way conducting units is at least two, at least two one-way conducting units are connected in series, the positive poles of the one-way conducting units connected in series are connected to the negative end of the photoelectric coupling unit, and the negative poles of the one-way conducting units connected in series are connected to the positive connection end.

[0013] In one embodiment, the reverse control module further includes at least one blocking unit, a first part of the blocking units in the at least one blocking unit are respectively connected to the voltage stabilizing element, the positive terminal of the photoelectric coupling unit and the negative connection terminal, and a second part of the blocking units in the at least one blocking unit are respectively connected to the voltage stabilizing element, the negative terminal of the photoelectric coupling unit and the positive connection terminal to reduce the current input to the voltage stabilizing element and the photoelectric coupling unit.

[0014] In one embodiment, the circuit further includes a controller, and the output end of the reverse control module is connected to the controller to receive and respond to the reverse connection alarm signal to perform a corresponding battery reverse connection operation.

[0015] In one embodiment, the photoelectric coupling unit is a photoelectric coupler, and the voltage stabilizing element is a voltage stabilizing diode.

[0016] In one embodiment, the unidirectional conducting unit is a diode.

[0017] In one embodiment, the reference voltage range includes 15V to 2500V.

[0018] In a second aspect, an embodiment of the present application provides a battery reverse connection protection device, comprising the battery reverse connection protection circuit as described in the first aspect.

[0019] In the above-mentioned battery reverse connection protection circuit, a voltage stabilizing element is provided to be connected between the positive connection terminal and the negative connection terminal, so that when the output voltage of the battery is within the reference voltage range corresponding to the voltage stabilizing element, the reverse control module can work normally. Since a voltage stabilizing element is provided in the reverse control module, a voltage with a stable value will be generated when current passes through the voltage stabilizing element, so that regardless of the value of the output voltage of the battery, the reverse control module can work under the voltage with the stable value. Therefore, the working voltage of the reverse control module of the present application realizes adaptive adjustment, and the reverse connection protection function for a wide range of battery voltages is realized based on a single element, thereby reducing the cost of the protection circuit. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The drawings herein are incorporated into the specification and constitute a part of the specification. These drawings illustrate embodiments consistent with the present application and are used together with the specification to illustrate the technical solution of the present application.

[0021] Figure 1 A structural example diagram of a battery reverse connection protection circuit provided in an embodiment of the present application;

[0022] Figure 2 A structural example diagram of a battery reverse connection protection circuit provided in an embodiment of the present application;

[0023] Figure 3 A structural example diagram of a battery reverse connection protection circuit provided in an embodiment of the present application;

[0024] Figure 4 A structural example diagram of a battery reverse connection protection circuit provided in an embodiment of the present application;

[0025] Figure 5 A structural example diagram of a battery reverse connection protection circuit provided in an embodiment of the present application;

[0026] Figure 6 A structural example diagram of a battery reverse connection protection circuit provided in an embodiment of the present application;

[0027] Figure 7 A schematic diagram of the implementation structure of the battery reverse connection protection circuit provided in an embodiment of the present application. DETAILED DESCRIPTION

[0028] In order to make the purpose, technical solution and advantages of the embodiments of the present application clearer, the specific technical solution of the present application will be further described in detail below in conjunction with the drawings in the embodiments of the present application. The following embodiments are used to illustrate the present application, but are not used to limit the scope of the present application.

[0029] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art to which this application belongs. The terms used herein are only for the purpose of describing the embodiments of this application and are not intended to limit this application.

[0030] In the following description, reference is made to “some embodiments”, which describe a subset of all possible embodiments, but it will be understood that “some embodiments” may be the same subset or different subsets of all possible embodiments and may be combined with each other without conflict.

[0031] It should be pointed out that the terms "first\second\third" involved in the embodiments of the present application are used to distinguish similar or different objects, and do not represent a specific ordering of the objects. It can be understood that "first\second\third" can be interchanged in a specific order or sequence where permitted, so that the embodiments of the present application described here can be implemented in an order other than that illustrated or described here.

[0032] Figure 1 This is a schematic diagram of a battery reverse connection protection circuit provided in an embodiment of the present application. Figure 1 As shown, the circuit may include a positive electrode connection terminal 102, a negative electrode connection terminal 101 and a reverse control module 103, wherein a first input terminal of the reverse control module 103 is connected to the negative electrode connection terminal 101, and a second input terminal of the reverse control module 103 is connected to the positive electrode connection terminal 102, wherein:

[0033] When the positive electrode of the battery is connected to the positive electrode connection terminal 102, the reverse control module 103 is in a non-operating state;

[0034] When the positive electrode of the battery is connected to the negative electrode connection terminal 101, the reverse control module 103 is in working state and outputs a reverse connection alarm signal, which indicates that the battery is in a reverse connection state;

[0035] The reverse control module 103 includes a voltage stabilizing element 1031 connected between the positive connection terminal 102 and the negative connection terminal 101 to control the reverse control module 103 to be in a working state when the output voltage of the battery is within a preset reference voltage range.

[0036] During the implementation process, the technicians connected the battery to the battery reverse connection protection circuit to realize the reverse connection test of the battery. When the positive pole of the battery is connected to the positive connection terminal 102, the reverse control module 103 is in a non-working state because the battery is correctly connected; when the positive pole of the battery is connected to the negative connection terminal 101, the reverse control module 103 is in a working state because the battery is not correctly connected, and outputs a reverse connection alarm signal indicating that the battery is in a reverse connection state to prompt the user that the battery is in a reverse connection state. Among them, because the voltage stabilizing element 1031 is set in the reverse control module 103, the voltage stabilizing element 1031 can generate a voltage with a stable value when current passes through it, so that the reverse control module 103 can work under a wide range of battery voltages.

[0037] Optionally, the reverse control module 103 may include a control unit, which is used to detect whether the positive electrode of the battery is connected to the positive electrode connection terminal 102, and control the reverse control module 103 to be in a working state when it is detected that the positive electrode of the battery is connected to the negative electrode connection terminal 101.

[0038] In some embodiments, the voltage stabilizing element 1031 is a voltage stabilizing diode, the anode of the voltage stabilizing diode is connected to the positive connection terminal 102, and the cathode of the voltage stabilizing diode is connected to the negative connection terminal 101, so that when the battery is reversely connected, if the battery voltage is within the reference voltage range, the voltage stabilizing diode will block the current flowing to the voltage stabilizing diode, so that the reverse control module 103 is in a working state, but when the battery voltage is greater than the reference voltage range, the voltage stabilizing diode is broken down, the reverse control module 103 is short-circuited, and the reverse control module 103 is in a non-working state.

[0039] In some embodiments, the reference voltage range may include 15V to 2500V.

[0040] In the above-mentioned battery reverse connection protection circuit, a voltage stabilizing element 1031 is provided to be connected between the positive connection terminal 102 and the negative connection terminal 101, so that when the output voltage of the battery is within the reference voltage range corresponding to the voltage stabilizing element 1031, the reverse control module 103 can work normally. Since the voltage stabilizing element 1031 is provided in the reverse control module 103, a voltage with a stable value will be generated when current passes through the voltage stabilizing element 1031, so that regardless of the value of the output voltage of the battery, the reverse control module 103 can work under the voltage of the stable value. Therefore, the working voltage of the reverse control module 103 of the present application realizes adaptive adjustment, and the reverse connection protection function for a wide range of battery voltages is realized based on a single element, thereby reducing the cost of the protection circuit.

[0041] In some embodiments, such as Figure 2As shown, the reverse control module 103 may further include a photoelectric coupling unit 1032, the positive terminal of the photoelectric coupling unit 1032 is connected to the negative electrode connection terminal 101, the negative terminal of the photoelectric coupling unit 1032 is connected to the positive electrode connection terminal 102, and the voltage stabilizing element 1031 is connected in parallel with the photoelectric coupling unit 1032, wherein:

[0042] When the positive electrode of the battery is connected to the negative electrode connection terminal 101, the voltage stabilizing element 1031 controls the photoelectric coupling unit 1032 to be in working state when the output voltage of the battery is within the reference voltage range, and the photoelectric coupling unit 1032 outputs a reverse connection alarm signal.

[0043] During the implementation process, since the positive terminal of the photoelectric coupling unit 1032 is connected to the negative electrode connection terminal 101, and the negative terminal of the photoelectric coupling unit 1032 is connected to the positive electrode connection terminal 102, when the positive electrode of the battery is connected to the negative electrode connection terminal 101, the photoelectric coupling unit 1032 can output a reverse connection alarm signal. Since the voltage stabilizing element 1031 is connected in parallel with the photoelectric coupling unit 1032, the voltage stabilizing element 1031 can provide a stable voltage to the photoelectric coupling unit 1032 when the battery voltage is within the reference voltage range, so that the photoelectric coupling unit 1032 operates under a wide range of battery voltages.

[0044] In some embodiments, the photoelectric coupling unit 1032 is a photoelectric coupler.

[0045] It is understandable that, by providing the photoelectric coupling unit 1032, the output of the reverse connection alarm signal can be realized. At the same time, since the cost of the photoelectric coupling device is relatively low, the cost of the battery reverse connection protection circuit is also reduced.

[0046] In some embodiments, such as Figure 3 As shown, the reverse control module 103 may also include a unidirectional conductive unit 1033, the negative electrode of the unidirectional conductive unit 1033 is connected to the positive electrode connection terminal 102, and the positive electrode of the unidirectional conductive unit 1033 is connected to the negative end of the photoelectric coupling unit 1032, so as to block the current flow between the battery and the photoelectric coupling unit 1032 when the positive electrode of the battery is connected to the positive electrode connection terminal 102, so that the photoelectric coupling unit 1032 and the voltage stabilizing element 1031 are both in a non-working state.

[0047] During the implementation process, since the negative pole of the one-way conductive unit 1033 is connected to the positive electrode connection terminal 102, and the positive pole of the one-way conductive unit 1033 is connected to the negative terminal of the photoelectric coupling unit 1032, when the positive pole of the battery is connected to the positive electrode connection terminal 102, the current of the battery cannot pass through the one-way conductive unit 1033, resulting in the photoelectric coupling unit 1032 and the voltage stabilizing element 1031 being in a non-working state; when the positive pole of the battery is connected to the negative electrode connection terminal 101, the current of the battery can pass through the one-way conductive unit 1033, resulting in the photoelectric coupling unit 1032 and the voltage stabilizing element 1031 being in a working state, thereby achieving that when the battery is correctly connected, the circuit does not work, and when the battery is incorrectly connected, the circuit works and outputs a reverse connection alarm signal indicating that the battery is in a reverse connection state.

[0048] In some embodiments, the unidirectional conductive unit 1033 is a diode.

[0049] In some embodiments, Figure 4 As shown, the number of the one-way conducting units 1033 is at least two, at least two one-way conducting units 1033 are connected in series, the positive pole of the one-way conducting units 1033 connected in series is connected to the negative end of the photoelectric coupling unit 1032, and the negative pole of the one-way conducting units 1033 connected in series is connected to the positive electrode connection terminal 102.

[0050] It can be understood that by providing at least two unidirectional conductive units 1033 connected in series, it can be ensured that when any unidirectional conductive unit 1033 is damaged, other unidirectional conductive units 1033 can block the output current when the battery is correctly connected, thereby ensuring the normal operation of the circuit.

[0051] In some embodiments, Figure 5 As shown, the reverse control module 103 also includes at least one blocking unit, a first part of the blocking units 1034a in the at least one blocking unit are respectively connected to the positive terminal and the negative connection terminal 101 of the voltage stabilizing element 1031 and the photoelectric coupling unit 1032, and a second part of the blocking units 1034b in the at least one blocking unit are respectively connected to the negative terminal and the positive connection terminal 102 of the voltage stabilizing element 1031 and the photoelectric coupling unit 1032 to reduce the current input to the voltage stabilizing element 1031 and the photoelectric coupling unit 1032.

[0052] Optionally, the above-mentioned current blocking unit can be a current limiting element such as a resistor, which is specifically configured by those skilled in the art according to actual conditions and is not limited in this application.

[0053] In some embodiments, Figure 6 As shown, the circuit further includes a controller 104, and the output end of the reverse control module 103 is connected to the controller 104 to receive and respond to the reverse connection alarm signal to perform a corresponding battery reverse connection operation.

[0054] Optionally, the battery reverse connection operation may be any corresponding operation when the battery is in a reverse connection state, which is specifically configured by those skilled in the art according to actual conditions and is not limited in this application.

[0055] Figure 7 The following is a schematic diagram of the implementation structure of a battery reverse connection protection circuit provided in an embodiment of the present application. Figure 7 As shown, the battery reverse connection protection circuit may include a positive electrode connection terminal 102BAT+, a negative electrode connection terminal 101BAT-, a voltage stabilizing element 1031, a photoelectric coupling unit 1032, at least one blocking unit and at least two unidirectional conduction units 1033, the voltage stabilizing element 1031 is a voltage stabilizing diode Z1, the photoelectric coupling unit 1032 is a photoelectric coupler TLP127, at least one blocking unit is a resistor R1, a resistor R2 and a resistor R3, at least two unidirectional conduction units 1033 are a diode D1 and a diode D2, and the negative The positive electrode of the diode D1 is connected to the positive electrode connection terminal 102BAT+, the positive electrode of the diode D2 is connected to the anode of the voltage zener diode Z1 and the negative electrode input terminal of the photocoupler TLP127, respectively, the positive electrode input terminal of the photocoupler TLP127 is connected to one end of the resistor R3, the other end of the resistor R3 is connected to the cathode of the voltage zener diode Z1 and one end of the resistor R1, respectively, the other end of the resistor R1 is connected to the negative electrode connection terminal 101BAT-, and the photocoupler TLP127 is connected to the controller 104. Among them, the resistor R1 and the resistor R2 are used to reduce the current to prevent the voltage zener diode Z1 from being overloaded and damaged, the resistor R3 is used to limit the current so that the current does not exceed the rated value of the photocoupler TLP127, the diode D1 and the diode D2 are used to block the current voltage when the battery is correctly connected, so that the circuit is in a non-working state, and the voltage zener diode Z1 is used to stabilize the voltage in the corresponding voltage range when the battery is reversely connected.

[0056] When the battery is reversely connected, the current output by the battery starts from BAT- and flows toward the resistor R1, passing through the resistor R3, the photocoupler TL127, the diode D2, the diode D1, the resistor R2, and returns to BAT+. Because the photocoupler TL127 is turned on, a reverse connection alarm signal can be sent to the controller to indicate that the battery of the controller is in a reverse connection state.

[0057] When the battery is correctly connected, the current output by the battery starts to flow from BAT+ toward the resistor R2, and is blocked at the diode D1 and stops flowing. At this time, since the photocoupler TL127 is not turned on, it will not send a reverse connection alarm signal to the controller, thereby reducing the power consumption at this time and achieving energy saving.

[0058] The present application also provides a battery reverse connection protection device, which may include the battery reverse connection protection circuit described in any of the above embodiments.

[0059] It should be understood that "one embodiment" or "an embodiment" or "some embodiments" mentioned throughout the specification means that specific features, structures or characteristics related to the embodiment are included in at least one embodiment of the present application. Therefore, "in one embodiment" or "in one embodiment" or "in some embodiments" appearing throughout the specification may not necessarily refer to the same embodiment. In addition, these specific features, structures or characteristics can be combined in one or more embodiments in any suitable manner. It should be understood that in various embodiments of the present application, the size of the sequence number of the above-mentioned processes does not mean the order of execution, and the execution order of each process should be determined by its function and internal logic, and should not constitute any limitation on the implementation process of the embodiment of the present application. The above-mentioned sequence numbers of the embodiments of the present application are only for description and do not represent the advantages and disadvantages of the embodiments. The above description of each embodiment tends to emphasize the differences between the various embodiments, and the same or similar aspects can be referenced to each other. For the sake of brevity, this article will not repeat them.

[0060] The term "and / or" in this article is only a description of the association relationship of associated objects, indicating that there may be three relationships. For example, object A and / or object B can represent three situations: object A exists alone, object A and object B exist at the same time, and object B exists alone.

[0061] It should be noted that, in this article, the terms "include", "comprises" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, an element defined by the sentence "comprises a ..." does not exclude the existence of other identical elements in the process, method, article or device including the element.

[0062] The modules described above as separate components may or may not be physically separated, and the components displayed as modules may or may not be physical modules; they may be located in one place or distributed on multiple network units; some or all of the modules may be selected according to actual needs to achieve the purpose of the present embodiment.

[0063] In addition, all functional modules in the embodiments of the present application may be integrated into one processing unit, or each module may be a separate unit, or two or more modules may be integrated into one unit; the above-mentioned integrated modules may be implemented in the form of hardware or in the form of hardware plus software functional units.

[0064] Those skilled in the art can understand that all or part of the steps in the various methods of the above embodiments can be completed by instructing related hardware through a program, and the program can be stored in a computer-readable storage medium, and the storage medium includes a read-only memory (ROM), a random access memory (RAM), a programmable read-only memory (PROM), an erasable programmable read-only memory (EPROM), a one-time programmable read-only memory (OTPROM), an electronically erasable rewritable read-only memory (EEPROM), a compact disc (CD-ROM) or other optical disc storage, magnetic disk storage, magnetic tape storage, or any other computer-readable medium that can be used to carry or store data.

[0065] The features disclosed in several product embodiments provided in this application can be arbitrarily combined without conflict to obtain new product embodiments.

[0066] The above is only an implementation method of the present application, but the protection scope of the present application is not limited thereto. Any person skilled in the art who is familiar with the present technical field can easily think of changes or substitutions within the technical scope disclosed in the present application, which should be included in the protection scope of the present application. Therefore, the protection scope of the present application should be based on the protection scope of the claims.

Claims

1. A battery reverse connection protection circuit, characterized in that: The circuit comprises a positive electrode connection terminal, a negative electrode connection terminal and a reverse control module, wherein a first input terminal of the reverse control module is connected to the negative electrode connection terminal, and a second input terminal of the reverse control module is connected to the positive electrode connection terminal, wherein: When the positive electrode of the battery is connected to the positive electrode connection terminal, the reverse control module is in a non-working state; When the positive electrode of the battery is connected to the negative electrode connection terminal, the reverse control module is in a working state and outputs a reverse connection alarm signal, wherein the reverse connection alarm signal indicates that the battery is in a reverse connection state; Wherein, the reverse control module includes a voltage stabilizing element, which is connected between the positive electrode connection terminal and the negative electrode connection terminal to control the reverse control module to be in the working state when the output voltage of the battery is within a reference voltage range, and the reference voltage range corresponds to the voltage stabilizing element.

2. The circuit according to claim 1, characterized in that The reverse control module further includes a photoelectric coupling unit, the positive terminal of the photoelectric coupling unit is connected to the negative connection terminal, the negative terminal of the photoelectric coupling unit is connected to the positive connection terminal, and the voltage stabilizing element is connected in parallel with the photoelectric coupling unit, wherein: When the positive electrode of the battery is connected to the negative electrode connection terminal, the voltage stabilizing element controls the photoelectric coupling unit to be in a working state when the output voltage of the battery is within the reference voltage range, and the photoelectric coupling unit outputs the reverse connection alarm signal.

3. The circuit according to claim 2, characterized in that The reverse control module also includes a unidirectional conductive unit, the negative electrode of the unidirectional conductive unit is connected to the positive electrode connection end, and the positive electrode of the unidirectional conductive unit is connected to the negative end of the photoelectric coupling unit, so as to block the current flow between the battery and the photoelectric coupling unit when the positive electrode of the battery is connected to the positive electrode connection end, so that the photoelectric coupling unit and the voltage stabilizing element are both in a non-working state.

4. The circuit according to claim 3, characterized in that The number of the one-way conductive units is at least two, at least two of which are connected in series, the positive poles of the one-way conductive units connected in series are connected to the negative end of the photoelectric coupling unit, and the negative poles of the one-way conductive units connected in series are connected to the positive connection end.

5. The circuit according to claim 3, characterized in that The reverse control module also includes at least one blocking unit, a first part of the blocking units in the at least one blocking unit are respectively connected to the voltage stabilizing element, the positive terminal of the photoelectric coupling unit and the negative connection terminal, and a second part of the blocking units in the at least one blocking unit are respectively connected to the voltage stabilizing element, the negative terminal of the photoelectric coupling unit and the positive connection terminal to reduce the current input to the voltage stabilizing element and the photoelectric coupling unit.

6. The circuit according to any one of claims 1 to 5, characterized in that: The circuit also includes a controller, and the output end of the reverse control module is connected to the controller to receive and respond to the reverse connection alarm signal to perform a corresponding battery reverse connection operation.

7. The circuit according to claim 2, characterized in that The photoelectric coupling unit is a photoelectric coupler, and the voltage stabilizing element is a voltage stabilizing diode.

8. The circuit according to claim 3, characterized in that The one-way conducting unit is a diode.

9. The circuit according to claim 1, characterized in that The reference voltage range includes 15V to 2500V.

10. A battery reverse connection protection device, characterized in that: The invention comprises a battery reverse connection protection circuit as described in any one of claims 1 to 9.

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