Battery type identification circuit and charger

Abstract

The utility model relates to a battery type identification circuit and a charger. The circuit comprises a voltage regulating module, a charging module and a control module, the voltage regulating module is used for supplying power to the battery module when being conducted and connected to the battery module so as to activate the battery module; the charging module is used for providing a pre-charging signal for the battery module when being conducted and connected to the battery module; under the condition that the battery module is activated, the control module controls the voltage regulating module to be disconnected with the battery module, controls the charging module to be connected with the battery module, and reads a first voltage corresponding to the battery module after the charging module provides a pre-charging signal for the battery module; when the control module reads the first voltage, the control module controls the voltage regulating module and the charging module to disconnect with the battery module, reads the second voltage corresponding to the battery module, and determines the battery type corresponding to the battery module according to the first voltage and the second voltage, thereby achieving the accurate recognition of different battery types.

Description

Technical Field

[0001] The present application relates to the technical field of battery type identification, and in particular to a battery type identification circuit and a charger. Background Art

[0002] At present, rechargeable batteries are increasingly used in daily life, for example, in various electronic devices. Moreover, as people's demands for electronic devices become increasingly diversified, different types of batteries are also increasing. For example, 1.5V constant voltage lithium batteries have been increasingly widely used.

[0003] As there are more and more battery types and different battery characteristics corresponding to different battery types, different types of batteries also require different charging methods. Based on the increasingly diverse battery types and people's demand for portability, people usually hope that only one charger can be compatible with multiple types of batteries. Therefore, if the same charger cannot accurately identify different battery types, it will obviously bring about power safety issues that cannot be ignored. Utility Model Content

[0004] Based on this, it is necessary to provide a battery type identification circuit and a charger that can accurately identify different battery types.

[0005] In a first aspect, the present application provides a battery type identification circuit. The circuit comprises:

[0006] The voltage regulating module is connected to the power module and is used to regulate the voltage of the power supply signal provided by the power module and supply power to the battery module to activate the battery module when connected to the battery module;

[0007] A charging module, used for providing a pre-charging signal to the battery module when being connected to the battery module;

[0008] The control module is connected to the voltage regulating module, the charging module and the battery module respectively;

[0009] Among them, the control module, when the battery module is activated, controls the voltage regulating module to disconnect from the battery module, controls the charging module to conduct the connection with the battery module, and reads the first voltage corresponding to the battery module after the charging module provides a pre-charging signal to the battery module; when the first voltage is read, the control module controls the voltage regulating module and the charging module to disconnect from the battery module, reads the second voltage corresponding to the battery module, and determines the battery type corresponding to the battery module according to the first voltage and the second voltage.

[0010] In a second aspect, the present application provides a charger, which includes a charger body and a rechargeable battery, wherein the charger body is provided with any circuit of the first aspect of the embodiment of the present application, and the charger body is connected to the rechargeable battery to charge the rechargeable battery.

[0011] The battery type identification circuit and charger described above include a voltage regulating module, a charging module and a control module; the voltage regulating module is used to regulate the power supply signal provided by the power supply module, and when connected to the battery module, supplies power to the battery module to activate the battery module; the charging module is used to provide a pre-charge signal to the battery module when connected to the battery module; the control module controls the voltage regulating module to disconnect from the battery module, controls the charging module to connect to the battery module, and reads the first voltage corresponding to the battery module after the charging module provides the pre-charge signal to the battery module when the battery module is activated; the control module controls the voltage regulating module and the charging module to disconnect from the battery module, reads the second voltage corresponding to the battery module, and determines the battery type corresponding to the battery module according to the first voltage and the second voltage. The battery type identification circuit disclosed in the present application is used to determine the battery type corresponding to the battery module according to the first voltage corresponding to the battery module after obtaining the pre-charge signal provided by the charging module, and the second voltage corresponding to the battery module after disconnecting from the voltage regulating module and the charging module, thereby realizing that batteries of different battery types can be accurately identified by only one circuit. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the conventional technology, the drawings required for use in the embodiments or the conventional technology descriptions are briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0013] Figure 1 A schematic diagram of the structure of a battery type identification circuit provided in an embodiment of the present application;

[0014] Figure 2 A schematic diagram of the structure of another battery type identification circuit provided in an embodiment of the present application;

[0015] Figure 3 A schematic diagram of the structure of another battery type identification circuit provided in an embodiment of the present application;

[0016] Figure 4 A schematic diagram of the structure of a second voltage regulating unit provided in an embodiment of the present application;

[0017] Figure 5A schematic diagram of the structure of another battery type identification circuit provided in an embodiment of the present application;

[0018] Figure 6 A schematic diagram of a process for determining the battery type corresponding to a battery module provided for the implementation of the present application. DETAILED DESCRIPTION

[0019] In order to facilitate understanding of the present application, the present application will be described more fully below with reference to the relevant drawings. Embodiments of the present application are provided in the drawings. However, the present application can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of the present application more thorough and comprehensive.

[0020] 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 in the specification of this application are only for the purpose of describing specific embodiments and are not intended to limit this application.

[0021] It is understood that the terms "first", "second", etc. used in this application may be used herein to describe various elements, but these elements are not limited by these terms. These terms are only used to distinguish a first element from another element. For example, without departing from the scope of this application, a first resistor may be referred to as a second resistor, and similarly, a second resistor may be referred to as a first resistor. Both the first resistor and the second resistor are resistors, but they are not the same resistor.

[0022] It can be understood that the “connection” in the following embodiments should be understood as “electrical connection”, “communication connection”, etc. if the connected circuits, modules, units, etc. have electrical signals or data transmission between each other.

[0023] It can be understood that “at least one” means one or more, “plurality” means two or more, and “at least a portion of an element” means a part or all of an element.

[0024] When used herein, the singular forms "a", "an", and "said / the" may also include plural forms, unless the context clearly indicates otherwise. It should also be understood that the terms "include / comprise" or "have" and the like specify the presence of stated features, wholes, steps, operations, components, parts, or combinations thereof, but do not exclude the possibility of the presence or addition of one or more other features, wholes, steps, operations, components, parts, or combinations thereof. At the same time, the term "and / or" used in this specification includes any and all combinations of the relevant listed items.

[0025] like Figure 1As shown, an embodiment of the present application provides a battery type identification circuit, the circuit comprising:

[0026] The voltage regulating module 100 is connected to the power module 400 , and is used for regulating the voltage of the power supply signal provided by the power module 400 , and when being connected to the battery module 500 , supplies power to the battery module 500 to activate the battery module 500 .

[0027] The charging module 200 is used to provide a pre-charging signal to the battery module 500 when being conductively connected to the battery module 500 .

[0028] The control module 300 is connected to the voltage regulating module 100 , the charging module 200 , and the battery module 500 , respectively.

[0029] Among them, the control module, when the battery module is activated, controls the voltage regulating module to disconnect from the battery module, controls the charging module to conduct the connection with the battery module, and reads the first voltage corresponding to the battery module after the charging module provides a pre-charging signal to the battery module; when the first voltage is read, the control module controls the voltage regulating module and the charging module to disconnect from the battery module, reads the second voltage corresponding to the battery module, and determines the battery type corresponding to the battery module according to the first voltage and the second voltage.

[0030] Optionally, the voltage regulation processing performed by the voltage regulation module 100 on the power supply signal provided by the power module 400 may include voltage boost processing and / or voltage drop processing.

[0031] Optionally, the power supply module 400 is a DC power supply.

[0032] Specifically, the purpose of activating the battery module 500 is to enable the parameters corresponding to the battery module 500 to be read; further, the purpose of activating the battery module 500 is to enable the current and / or voltage corresponding to the battery module 500 to be read. Optionally, the parameters corresponding to the battery module 500 may be read by the charging module 200, or the control module 300 may read the parameters corresponding to the battery module 500.

[0033] Optionally, the pre-charge signal provided by the charging module 200 to the battery module 500 may be a pre-charge current, a pre-charge voltage, or a pre-charge power; when the pre-charge signal is a pre-charge current, the pre-charge current may be less than or equal to a preset current; when the pre-charge signal is a pre-charge voltage, the pre-charge voltage may be less than or equal to a preset voltage; when the pre-charge signal is a pre-charge power, the pre-charge power may be less than or equal to a preset power.

[0034] Optionally, the pre-charging signal provided by the charging module 200 to the battery module 500 can be maintained for a preset time, and after the preset time ends, the first voltage corresponding to the battery module 500 is read; exemplarily, if the preset time is 30 seconds, the charging module 200 provides a 30-second pre-charging signal to the battery module 500.

[0035] Optionally, the control module 300 may be an MCU control module; another option is that the control module 300 is a single chip microcomputer, and the single chip microcomputer has central processing unit functions, such as computing, memory, USB and A / D conversion functions, and can perform combined control of different functions according to different application scenarios. The control module 300 can be used to identify the voltage range and battery type of the battery module 500, and based on the determined battery type corresponding to the battery module 500, control the charging module 200 to charge the battery module 500 based on the battery type.

[0036] The first voltage corresponding to the battery module 500 refers to the voltage of the battery module 500 after the pre-charging signal is provided; the second voltage corresponding to the battery module 500 refers to the no-load voltage of the battery module 500.

[0037] Optionally, the battery type corresponding to the battery module 500 may include a 3.7V lithium battery, a 1.5V lithium battery, a disposable dry cell, a nickel-metal hydride battery, or other battery types.

[0038] Optionally, the battery module 500 may also be connected to a ground terminal.

[0039] In this embodiment, the battery type identification circuit includes a voltage regulating module, a charging module and a control module; the voltage regulating module is used to regulate the power supply signal provided by the power supply module, and when connected to the battery module, supply power to the battery module to activate the battery module; the charging module is used to provide a pre-charge signal to the battery module when connected to the battery module; when the battery module is activated, the control module controls the voltage regulating module to disconnect from the battery module, controls the charging module to connect to the battery module, and reads the first voltage corresponding to the battery module after the charging module provides the pre-charge signal to the battery module; when the control module reads the first voltage, the control module controls the voltage regulating module and the charging module to disconnect from the battery module, reads the second voltage corresponding to the battery module, and determines the battery type corresponding to the battery module according to the first voltage and the second voltage. The battery type identification circuit disclosed in the present application is used to determine the battery type corresponding to the battery module according to the first voltage corresponding to the battery module after obtaining the pre-charge signal provided by the charging module, and the second voltage corresponding to the battery module after disconnecting from the voltage regulating module and the charging module, thereby realizing that batteries of different battery types can be accurately identified by only one circuit.

[0040] In one embodiment, when the above-mentioned second voltage does not meet the first preset voltage condition, the charging module 200 is turned on to provide a pre-charging signal to the battery module 500 again to read the third voltage corresponding to the battery module 500, and determine the battery type corresponding to the battery module 500 based on the third voltage and the second voltage.

[0041] Optionally, the first preset voltage condition should be set to a voltage condition sufficient to accurately distinguish the first type of battery; the first preset voltage condition may be a first preset voltage range, and thus, the second voltage does not satisfy the first preset voltage condition, which may mean that the second voltage is outside the first preset voltage range; the first preset voltage condition may also be that the second voltage is greater than or equal to the first preset voltage, and thus, the second voltage does not satisfy the first preset voltage condition, which may mean that the second voltage is less than the first preset voltage.

[0042] For example, if the first type of battery is a 3.7V lithium battery, and due to the battery characteristics of the 3.7V lithium battery, its no-load voltage may usually be between 2.4-4.35V. Therefore, the first preset voltage condition in this case may be a first preset voltage range corresponding to 2.4-4.35V, that is, the first preset voltage range corresponding to the first preset voltage condition is the no-load voltage range of the first type of battery; or the second voltage may be greater than or equal to the first preset voltage, and the first preset voltage is 2.4V, that is, the first preset voltage corresponding to the first preset voltage condition is the minimum no-load voltage of the first type of battery.

[0043] The third voltage corresponding to the battery module 500 refers to the voltage after the battery module 500 is provided with a pre-charge signal; the third voltage may be the same as the first voltage, or may be different from the first voltage. Optionally, if the type of battery corresponding to the battery module 500 cannot be determined based on the third voltage and the second voltage, the charging module 200 may be disconnected and then turned on again to provide the pre-charge signal to the battery module 500 again, so as to read the new third voltage corresponding to the battery module 500 again, until the type of battery corresponding to the battery module 500 is determined based on the new third voltage and the second voltage.

[0044] It should be noted that the first preset voltage condition in this exemplary embodiment is merely an example of a voltage range value of a first preset voltage condition. In a specific implementation, the first preset voltage condition may also be other voltage range values. As long as it can cooperate with the second preset voltage condition to identify different battery types corresponding to the battery module 500, there is no limitation here.

[0045] In this embodiment, when the second voltage does not meet the first preset voltage condition, the charging module is turned on to provide a pre-charging signal to the battery module again, so as to read the third voltage corresponding to the battery module, and determine the battery type corresponding to the battery module according to the third voltage and the second voltage. By turning on the charging module to provide the pre-charging signal to the battery module again, it is achieved that batteries of different battery types can be accurately identified by only one circuit.

[0046] In one embodiment, in determining the battery type corresponding to the battery module 500 according to the first voltage and the second voltage, the control module 300 is specifically configured to:

[0047] When the second voltage satisfies the first preset voltage condition, it is determined that the battery module 500 is a first type battery.

[0048] like Figure 2 As shown, in one embodiment, the voltage regulating module 100 includes a voltage regulating unit 1002 and a first switch unit 1004 .

[0049] The voltage regulating unit 1002 is connected to the power module 400 , the control module 300 , and the first switch unit 1004 , respectively, and is used to adjust the voltage of the activated battery module 500 .

[0050] The first switch unit 1004 is connected to the control module 300 and the battery module 500 respectively, and is used to open or close the path connecting the voltage regulating unit 1002 to the battery module 500 .

[0051] Optionally, the voltage regulating unit 100 may be used to increase and / or decrease the voltage of the activated battery module 500 .

[0052] Optionally, the voltage regulating unit 100 may include a buck device and / or a boost device. Further, the buck device may be a low dropout regulator (LDO) buck device, and the boost device may be a boost-type DC-DC converter device.

[0053] Exemplarily, when the voltage regulating unit 100 includes a buck device and a boost device, the buck device may be located between the power module 400 and the boost device, and the boost device may be located between the buck device and the battery module 400, so that the buck device steps down the power supply signal provided by the power module 400 to obtain a stepped-down power supply signal, the buck device provides the stepped-down power supply signal to the boost device, the boost device then steps up the stepped-down power supply signal to obtain a stepped-up power supply signal, and the boost device provides the stepped-down power supply signal to the battery module 500 to activate the battery module 500.

[0054] Optionally, the first switch unit 1004 may be a circuit unit including a field effect transistor, a triode or other switch devices, or may be a field effect transistor, a triode or other switch devices.

[0055] Specifically, the first switch unit 1004 enables the passage between the voltage regulating module 100 and the battery module 500 to be selectively turned on or off, so that when the voltage regulating module 100 is not required to supply power to the battery module 500, or when only the charging module 200 needs to provide a pre-charging signal to the battery module 500, the passage between the voltage regulating module 100 and the battery module 500 can be disconnected by disconnecting the first switch unit 1004, so as to avoid the battery module 500 still receiving power from the voltage regulating module 100 when the voltage regulating module 100 is not required to supply power, which makes it difficult to identify different battery types according to the electrical parameters of the battery module 500. Obviously, the presence of the first switch unit 1004 ensures that the circuit can accurately identify different battery types.

[0056] In this embodiment, the voltage regulating module includes a voltage regulating unit and a first switch unit, wherein the voltage regulating unit is used to adjust the voltage of the activated battery module, and the first switch unit is used to open or close the path connecting the voltage regulating unit to the battery module. Thus, the voltage regulating module can connect to the voltage module through the closed first switch unit to supply power to the battery module to activate the battery module.

[0057] like Figure 3 As shown, in one embodiment, the voltage regulating module 100 includes a first voltage regulating unit 1006 , a second voltage regulating unit 1008 and a first switch unit 1004 .

[0058] The first voltage regulating unit 1006 is connected to the power module 400 , the control module 300 , and the first switch unit 1004 , respectively, and is used to reduce the voltage of the power supply signal provided by the power module 400 under the control of the control module 300 .

[0059] The first switch unit 1004 is connected to the control module 300 and the second voltage regulating unit 1008 respectively, and is used to open or close the path connecting the first voltage regulating unit 1006 to the second voltage regulating unit 1008 .

[0060] The second voltage regulating unit 1008 is connected to the control module 300 and the battery module 500 respectively, and is used to perform voltage boost processing on the power supply signal provided by the power module 400 after voltage boost processing.

[0061] Optionally, the first voltage regulating unit 1006 includes a buck device, which may be an LDO buck device; the second voltage regulating unit 1008 includes a boost device, which may be a boost-type DC-DC converter device.

[0062] Exemplarily, the first voltage regulating unit 1006 steps down the power supply signal provided by the power module 400 to obtain a stepped-down power supply signal. When the first switch unit 1004 is turned on, the first voltage regulating unit 1006 provides the stepped-down power supply signal to the second voltage regulating unit 1008. The second voltage regulating unit 1008 then steps up the stepped-down power supply signal to obtain a stepped-up power supply signal. The second voltage regulating unit 1008 provides the stepped-up power supply signal to the battery module 500 to activate the battery module 500.

[0063] In this embodiment, the voltage regulating module includes a first voltage regulating unit, a second voltage regulating unit and a first switch unit, wherein the first voltage regulating unit is used to step down the power supply signal provided by the power module under the control of the control module, the first switch unit is used to step down the power supply signal provided by the power module under the control of the control module, and the second voltage regulating unit is used to step up the power supply signal provided by the power module after the step-up process, so that the voltage obtained by first stepping down the power supply signal provided by the power module and then stepping up the power supply signal can be used to correctly and safely activate the battery module.

[0064] In one embodiment, the voltage regulating module 100 includes a first voltage regulating unit 1006 , a second voltage regulating unit 1008 and a first switch unit 1004 .

[0065] The second voltage regulating unit 1008 is connected to the power module 400 , the control module 300 , and the first switch unit 1004 , respectively, and is used to perform voltage boosting on the power supply signal provided by the power module 400 after voltage boosting.

[0066] The first switch unit 1004 is connected to the control module 300 and the first voltage regulating unit 1006 respectively, and is used to open or close the path connecting the first voltage regulating unit 1006 to the second voltage regulating unit 1008 .

[0067] The first voltage regulating unit 1006 is connected to the control module 300 and the battery module 500 respectively, and is used to reduce the voltage of the power supply signal provided by the power module 400 under the control of the control module 300 .

[0068] Exemplarily, the second voltage regulating unit 1008 boosts the power supply signal provided by the power module 400 to obtain a boosted power supply signal. When the first switch unit 1004 is turned on, the second voltage regulating unit 1008 provides the boosted power supply signal to the first voltage regulating unit 1006. The first voltage regulating unit 1006 then steps down the boosted power supply signal to obtain a stepped-down power supply signal. The first voltage regulating unit 1006 provides the stepped-down power supply signal to the battery module 500 to activate the battery module 500.

[0069] In this embodiment, the voltage obtained by first performing a voltage-boosting process on the power supply signal provided by the power module and then performing a voltage-down process can be used to correctly and safely activate the battery module.

[0070] like Figure 4 As shown, in one embodiment, the second voltage regulating unit 1008 includes a first capacitor C1, a second capacitor C2, a first inductor L1, a first chip U1, a first diode D1, a first resistor R1 and a second resistor R2.

[0071] The first end of the first capacitor C1 is connected to the first end of the first inductor L1 , the power signal port VCC of the first chip U1 , and the enable port EN.

[0072] The second end of the first inductor L1 is connected to the anode of the first diode D1 and the switch signal port LX of the first chip U1 .

[0073] A cathode of the first diode D1 is connected to a first end of the first resistor R1 and a first end of the second capacitor C2.

[0074] The second end of the first resistor R1 is connected to the feedback port FB of the first chip U1 and the first end of the second resistor R2 .

[0075] The second end of the first capacitor C1 is connected to the ground port GND of the first chip U1 , the second end of the second resistor R2 , and the second end of the second capacitor C2 .

[0076] Optionally, the first chip U1 may be a DC-DC boost circuit chip.

[0077] Optionally, the first inductor L1 may be an inductor with an iron core.

[0078] Specifically, the first end of the first capacitor C1 is an end of the second voltage regulating unit 1008 away from the battery module 500 , and the first end of the second capacitor C2 is an end of the second voltage regulating unit 1008 close to the battery module 500 .

[0079] It should be noted that if Figure 4 The figure only shows one implementable circuit structure of the second voltage regulating unit 1008. In a specific implementation, the second voltage regulating unit 1008 may also exist in the form of other circuit structures, as long as the function of the second voltage regulating unit 1008 can be realized, and there is no limitation here.

[0080] like Figure 5 As shown, in one embodiment, the charging module 200 includes a driving unit 2002 and a second switch unit 2004 .

[0081] The driving unit 2002 is connected to the power module 400 , the control module 300 , and the second switch unit 2004 , respectively, and is used to switch on or off the second switch unit 2004 under the action of a switch control signal of the control module 300 .

[0082] The second switch unit 2004 is connected to the battery module 500 and is used to open or close the path connecting the driving unit 2002 to the battery module 500 .

[0083] Optionally, the driving unit 2002 may include a PWM signal generating circuit. When the driving unit 2002 includes a PWM signal generating circuit, the control module 300 is further used to control the PWM signal generating circuit to send a PWM signal to the second switch unit 2004 to drive the second switch unit 2004 to turn on or off.

[0084] Optionally, the second switch unit 2004 may be a circuit unit including a field effect transistor, a triode or other switch devices, or may be a field effect transistor, a triode or other switch devices.

[0085] Optionally, the charging module 200 may further include a voltage detection unit and a current detection unit, wherein the voltage detection unit is used to detect a voltage value of the battery module 500 , and the current detection unit is used to detect a current value corresponding to the battery module 500 .

[0086] Specifically, the second switch unit 2004 enables the passage between the charging module 200 and the battery module 500 to be selectively turned on or off, so that when the charging module 200 is not required to provide a pre-charging signal to the battery module 500, or when only the voltage regulating module 100 needs to supply power to the battery module 500, the passage between the charging module 200 and the battery module 500 can be disconnected by disconnecting the second switch unit 2004, so as to avoid the battery module 500 receiving the pre-charging signal provided by the charging module 200 when the charging module 200 is not required to provide a pre-charging signal, which makes it difficult to identify different battery types according to the electrical parameters of the battery module 500. Obviously, the existence of the second switch unit 2004 ensures that the circuit can accurately identify different battery types. Further, under the cooperation of the first switch unit 1004 and the second switch unit 2004, the accuracy and flexibility of the circuit in identifying the battery type of the battery module 500 can be further significantly improved.

[0087] In this embodiment, the charging module includes a driving unit and a second switch unit, wherein the driving unit is used to turn on or off the second switch unit under the action of the switch control signal of the control module, and the second switch unit is used to turn on or off the path connecting the driving unit to the battery module. Therefore, by building the driving unit and the second switch unit into the charging module, the pre-charging signal provided by the charging module to the battery module can meet the voltage requirement of the battery module, thereby realizing stable, safe and convenient power supply to the battery module.

[0088] In one embodiment, the control module 300 is also used to control the charging module 200 to disconnect from the battery module 500, and to control the voltage regulating module 100 to be in a non-constant disconnected state, so that when the voltage regulating module 100 is connected to the battery module 500, it supplies power to the battery module 500 to activate the battery module 500.

[0089] Among them, non-constant disconnection includes conduction, and alternation of conduction and disconnection; therefore, the control voltage regulating module 100 is in a non-constant disconnection state, which means that the control voltage regulating module 100 is not in a constant disconnection state, that is, the control voltage regulating module 100 is in a conduction state, or the control voltage regulating module 100 is in a state of alternating between conduction and disconnection.

[0090] In this embodiment, the control module is also used to control the charging module to disconnect from the battery module, and to control the voltage regulating module to be in an on state, or to control the voltage regulating module to be in an alternating state of on and off working states, so that when the voltage regulating module is connected to the battery module, it can supply power to the battery module to activate the battery module, thereby enabling the corresponding parameters of the battery module to be read, ensuring that the circuit provided in this embodiment can determine the battery type corresponding to the battery module based on the first voltage and the second voltage subsequently read.

[0091] In one embodiment, in determining the battery type corresponding to the battery module according to the first voltage and the second voltage, the control module 300 is specifically configured to:

[0092] When the first voltage satisfies the second preset voltage condition and the second voltage satisfies the first preset voltage condition, it is determined that the battery module 500 is a first type battery.

[0093] In terms of determining the battery type corresponding to the battery module according to the third voltage and the second voltage, the control module 300 is specifically used for:

[0094] When the third voltage satisfies the second preset voltage condition and the second voltage does not satisfy the first preset voltage condition, it is determined that the battery module 500 is a second type battery.

[0095] When the third voltage does not satisfy the second preset voltage condition and the second voltage does not satisfy the first preset voltage condition, it is determined that the battery module 500 is a third type battery.

[0096] Optionally, the second preset voltage condition should be set to a voltage condition sufficient to accurately distinguish the first type of battery, the second type of battery from the third battery type; the second preset voltage condition can be a second preset voltage range, so that the first voltage does not satisfy the second preset voltage condition, which can mean that the first voltage is outside the second preset voltage range; the second preset voltage condition can also be that the first voltage is greater than or equal to the second preset voltage, so that the first voltage does not satisfy the second preset voltage condition, which can mean that the first voltage is less than the second preset voltage.

[0097] Exemplarily, if the first type battery and the second type battery are both lithium batteries, and the third type battery is another type of battery, the second preset voltage condition should be set to a voltage condition sufficient to accurately distinguish the lithium battery from the other type of battery.

[0098] Exemplarily, if the first type of battery is a 3.7V lithium battery and the second type of battery is a 1.5V lithium battery, and due to the battery characteristics of the 3.7V lithium battery and the 1.5V lithium battery, the voltage after being provided with a pre-charge signal may generally be between 2.4-4.35V. Therefore, the second preset voltage condition in this case may be a corresponding second preset voltage range of 2.4-4.35V, that is, the second preset voltage range corresponding to the second preset voltage condition is the voltage range after the first type of battery and the second type of battery are provided with a pre-charge signal; or the first voltage may be greater than or equal to the second preset voltage, and the second preset voltage is 2.4V, that is, the second preset voltage corresponding to the second preset voltage condition is the lowest voltage after the first type of battery and the second type of battery are provided with a pre-charge signal.

[0099] It should be noted that the second preset voltage condition in this exemplary embodiment is merely an example of a voltage range value of a second preset voltage condition. In a specific implementation, the second preset voltage condition may also be other voltage range values. As long as it can be combined with the first preset voltage condition to identify different battery types corresponding to the battery module 500, there is no limitation here.

[0100] In this embodiment, when the first voltage satisfies the second preset voltage condition and the second voltage satisfies the first preset voltage condition, the battery module is determined to be a first type battery; when the third voltage satisfies the second preset voltage condition and the second voltage does not satisfy the first preset voltage condition, the battery module is determined to be a second type battery; and when the third voltage does not satisfy the second preset voltage condition and the second voltage does not satisfy the first preset voltage condition, the battery module is determined to be a third type battery. Thus, by comparing the voltage of the battery module after the pre-charge signal is provided and the no-load voltage, it is achieved that batteries of different battery types can be accurately identified by only one circuit.

[0101] In one embodiment, the control module 300 is further used to control the charging module 200 to charge the battery module 500 based on the battery type.

[0102] Specifically, the control module 300 is further used to control the charging module 200 to charge the battery module 500 based on the battery type, including: the control module 300 is further used to control the charging module 200 to charge the battery module 500 based on the charging method corresponding to the battery type.

[0103] Exemplarily, when the battery type is a 3.7V lithium battery, the control module 300 controls the charging module 200 to charge the battery module 500 based on the charging method of a 3.7V lithium battery; when the battery type is a 1.5V lithium battery, the control module 300 controls the charging module 200 to charge the battery module 500 based on the charging method of a 1.5V lithium battery; the same applies when the battery type is other types, which will not be repeated here.

[0104] In this embodiment, the control module is also used to control the charging module to charge the battery module based on the battery type. Thus, after determining the battery type corresponding to the battery module according to the first voltage and the second voltage, the battery module can be charged based on the charging method corresponding to the battery type, thereby achieving accurate identification of batteries of different battery types while accurately charging the battery module based on the charging method corresponding to the battery type, thereby ensuring the charging safety of the battery module.

[0105] In one embodiment, the power supply voltage corresponding to the power supply signal of the power module 400 is 4.4V-16V.

[0106] In one embodiment, the power supply voltage corresponding to the power supply signal of the power module 400 is one of 5V, 9V and 12V.

[0107] In one embodiment, the output voltage of the first voltage regulating unit 1006 is 2V-4V.

[0108] In one embodiment, the output voltage of the second voltage regulating unit 1008 is 4.5V-10V.

[0109] like Figure 6 As shown, in one embodiment, after reading the first voltage and the second voltage corresponding to the battery module 500, the control module 300 detects whether the second voltage meets the first preset voltage condition. If so, that is, when it is detected that the second voltage meets the first preset voltage condition, the battery module 500 is determined to be a first type battery according to the second voltage, and the control module 300 controls the charging module 200 to charge the battery module 500 based on the charging method corresponding to the first type battery; if not, that is, when it is detected that the second voltage does not meet the first preset voltage condition, the control module 300 detects the third voltage after reading the third voltage of the battery module 500. Whether the third voltage satisfies the second preset voltage condition; if so, that is, when it is detected that the third voltage satisfies the second preset voltage condition, the battery module 500 is determined to be a second type battery according to the third voltage and the second voltage, and the control module 300 controls the charging module 200 to charge the battery module 500 based on the charging method corresponding to the second type battery; if not, that is, when it is detected that the third voltage does not satisfy the second preset voltage condition, the battery module 500 is determined to be a third type battery according to the third voltage and the second voltage, and the control module 300 controls the charging module 200 to charge the battery module 500 based on the charging method corresponding to the third type battery.

[0110] The application process of the above-mentioned battery type identification circuit is described below in conjunction with a detailed embodiment, which is as follows: Assume that the first preset voltage condition is greater than or equal to 2.4V, and the second preset voltage condition is 2.4-4.35V, the first type of battery is a 3.7V lithium battery, the second type of battery is a 1.5V lithium battery, and the third type of battery is a nickel-hydrogen battery;

[0111] First, the control module 300 controls the voltage regulating module 100 to be turned on, so that the voltage regulating module 100 is turned on and connected to the battery module 500 to activate the battery module 500. When the battery module 500 is activated, the control module 300 controls the voltage regulating module 100 to disconnect from the battery module 500, so as to control the charging module 200 to be turned on and connected to the battery module 500, so that the charging module 200 provides a pre-charging signal to the battery module 500, so that the control module 300 reads the first voltage corresponding to the battery module 500. At this time, if the first voltage is between 2.4-4.35V, the control module 300 cannot identify whether the battery module 500 is a 3.7V lithium battery or a 1.5V lithium battery.

[0112] Next, in order to accurately identify the battery type corresponding to the battery module 500, the control module 300 controls the voltage regulating module 100 and the charging module 200 to disconnect from the battery module 500 respectively, so as to read the second voltage corresponding to the battery module 500. When the first voltage corresponding to the battery module 500 is between 2.4-4.35V and the second voltage is greater than or equal to 2.4V, it is determined that the battery module 500 is a 3.7V lithium battery; however, when the second voltage corresponding to the battery module 500 is less than 2.4V, the battery module 500 may be a 1.5V lithium battery or a nickel-metal hydride battery. Therefore, in order to avoid safety problems caused by charging the battery module 500 in the wrong charging method, when the second voltage is less than 2.4V, it is necessary to determine the voltage corresponding to the battery module 500 to which the pre-charging signal is provided again, so as to further distinguish between 1.5V lithium batteries and nickel-metal hydride batteries;

[0113] Then, the control module 300 turns on the charging module 200 to provide a pre-charging signal to the battery module 500 again, so as to read the third voltage corresponding to the battery module 500, and determine the battery type corresponding to the battery module 500 again according to the third voltage and the second voltage. Specifically, if the third voltage is between 2.4-4.35V and the second voltage is less than 2.4V, the battery module 500 is determined to be a 1.5V lithium battery; if the third voltage is outside the range of 2.4-4.35V, for example, the third voltage is less than 2.4V and the second voltage is less than 2.4V, the battery module 500 is determined to be a nickel-hydrogen battery.

[0114] So far, the circuit provided in the embodiment of the present application realizes the identification of 3.7V lithium battery, 1.5V lithium battery and nickel-metal hydride battery. It should be noted that the first preset voltage condition and the second preset voltage condition in this exemplary embodiment are only examples of voltage range values ​​of a first preset voltage condition and a second preset voltage condition, respectively. In a specific implementation, the first preset voltage condition and / or the second preset voltage condition can also be other voltage range values, as long as the different battery types corresponding to the battery module 500 can be identified, and there is no limitation here.

[0115] It can be understood that the above-mentioned battery type identification circuit can also adopt other forms, and is not limited to the forms mentioned in the above-mentioned embodiments, as long as it can achieve the function of accurately identifying different battery types.

[0116] The present application also provides a charger, which includes a charger body and a rechargeable battery. Any circuit in the above-mentioned battery type identification circuit embodiments is arranged in the charger body, and the charger body is connected to the rechargeable battery to charge the rechargeable battery.

[0117] In the description of this specification, the description with reference to the terms "some embodiments", "other embodiments", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic description of the above terms does not necessarily refer to the same embodiment or example.

[0118] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0119] The above-described embodiments only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the present application. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the protection scope of the present application shall be subject to the attached claims.

Claims

1. A battery type identification circuit, characterized in that: The circuit comprises: a voltage regulating module connected to the power module, for regulating the voltage of the power supply signal provided by the power module, and supplying power to the battery module to activate the battery module when connected to the battery module; a charging module, configured to provide a pre-charging signal to the battery module when being conductively connected to the battery module; A control module, connected to the voltage regulating module, the charging module, and the battery module respectively; Among them, when the battery module is activated, the control module controls the voltage regulating module to disconnect from the battery module, controls the charging module to conduct the connection with the battery module, and reads the first voltage corresponding to the battery module after the charging module provides a pre-charging signal to the battery module; when the first voltage is read, the control module controls the voltage regulating module and the charging module to disconnect from the battery module, reads the second voltage corresponding to the battery module, and determines the battery type corresponding to the battery module according to the first voltage and the second voltage.

2. The circuit according to claim 1, characterized in that When the second voltage does not meet the first preset voltage condition, the charging module is turned on to provide a pre-charging signal to the battery module again, so as to read the third voltage corresponding to the battery module, and determine the battery type corresponding to the battery module based on the third voltage and the second voltage.

3. The circuit according to claim 1, characterized in that The voltage regulating module includes a voltage regulating unit and a first switch unit; The voltage regulating unit is connected to the power module, the control module and the first switch unit respectively, and is used to adjust the voltage for activating the battery module; The first switch unit is connected to the control module and the battery module respectively, and is used to open or close the path connecting the voltage regulating unit to the battery module.

4. The circuit according to claim 1, characterized in that The voltage regulating module includes a first voltage regulating unit, a second voltage regulating unit and a first switch unit; The first voltage regulating unit is connected to the power module, the control module and the first switch unit respectively, and is used to reduce the voltage of the power supply signal provided by the power module under the control of the control module; The first switch unit is connected to the control module and the second voltage regulating unit respectively, and is used to open or close the path connecting the first voltage regulating unit to the second voltage regulating unit; The second voltage regulating unit is connected to the control module and the battery module respectively, and is used to perform voltage boost processing on the power supply signal provided by the power module after voltage boost processing.

5. The circuit according to claim 4, characterized in that The output voltage of the first voltage regulating unit is 2V-4V.

6. The circuit according to claim 4, characterized in that The output voltage of the second voltage regulating unit is 4.5V-10V.

7. The circuit according to claim 1, characterized in that The charging module includes a driving unit and a second switch unit; The driving unit is connected to the power module, the control module, and the second switch unit respectively, and is used to turn on or off the second switch unit under the action of the switch control signal of the control module; The second switch unit is connected to the battery module and is used to open or close a path connecting the drive unit to the battery module.

8. The circuit according to claim 1, characterized in that The control module is also used to control the charging module to disconnect from the battery module, and control the voltage regulating module to be in a non-constant disconnection state, so that when the voltage regulating module is connected to the battery module, it supplies power to the battery module to activate the battery module.

9. The circuit according to any one of claims 1 to 8, characterized in that: The control module is further configured to control the charging module to charge the battery module based on the battery type.

10. A charger, characterized in that: The invention comprises a charger body and a rechargeable battery, wherein the charger body is provided with a circuit as described in any one of claims 1 to 9, and the charger body is connected with the rechargeable battery to charge the rechargeable battery.

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