CN216086205U - Battery charging and discharging circuit and battery - Google Patents
Battery charging and discharging circuit and battery Download PDFInfo
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- CN216086205U CN216086205U CN202122112782.6U CN202122112782U CN216086205U CN 216086205 U CN216086205 U CN 216086205U CN 202122112782 U CN202122112782 U CN 202122112782U CN 216086205 U CN216086205 U CN 216086205U
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Abstract
The utility model discloses a battery charging and discharging circuit and a battery, belonging to the technical field of batteries, wherein the circuit comprises a battery module, a charging switch module and a protection control module which are respectively connected with the battery module, a first interface module and a charging driving module which are respectively connected with the charging switch module, and a second interface module which is connected with the protection control module, wherein the first interface module and the second interface module are respectively connected with the charging driving module, and the second interface module is connected with the battery module; the first interface module and the second interface module are used for inputting charging voltage; the charging driving module is used for generating a driving signal according to the charging voltage and driving the charging switch module to control the circuit to be switched on or switched off; the protection control module is used for controlling the circuit to be switched on or switched off according to the state of the battery module. The utility model solves the problem that the battery can not be charged and discharged simultaneously in the prior art, achieves the effects of charging while discharging, having practicability and more comprehensive functions.
Description
Technical Field
The utility model relates to the technical field of batteries, in particular to a battery charging and discharging circuit and a battery.
Background
The external battery is also called as a mobile power supply, the internal lithium battery supplies power to various electronic devices after being stored with electricity by the lithium battery, and the external battery has charging and discharging functions. At present, external batteries used for electronic equipment such as digital products, scanning equipment and detection equipment in the market can not discharge to the electronic equipment simultaneously when self carries out lithium battery charging, and the use is limited under some special conditions, so that the battery in the prior art has the problem that the battery can not be charged and discharged simultaneously.
SUMMERY OF THE UTILITY MODEL
The main purposes of the utility model are as follows: the utility model provides a battery charge-discharge circuit and battery, aims at solving the technical problem that the battery can not charge and discharge simultaneously among the prior art.
In order to achieve the purpose, the utility model adopts the following technical scheme:
in a first aspect, the present invention provides a battery charging and discharging circuit, where the circuit includes a battery module, a charging switch module and a protection control module respectively connected to the battery module, a first interface module and a charging driving module respectively connected to the charging switch module, and a second interface module connected to the protection control module, where the first interface module and the second interface module are respectively connected to the charging driving module, and the second interface module is connected to the battery module;
the first interface module is used for inputting the received charging voltage into the battery module and outputting a discharging voltage;
the second interface module is used for inputting the received charging voltage into the battery module;
the charging driving module is used for generating a driving signal according to the charging voltage and sending the driving signal to the charging switch module;
the charging switch module is used for controlling the connection between the first interface module and the battery module to be switched on or off according to the driving signal;
the battery module is used for receiving the charging voltage, releasing the discharging voltage and sending the discharging voltage to the first interface module;
the protection control module is used for controlling the connection between the second interface module and the battery module to be switched on or switched off according to the state of the battery module.
Optionally, in the above battery charging and discharging circuit, the circuit further includes a voltage detection module connected to the charging driving module, and the voltage detection module is connected to the first interface module and the second interface module respectively;
the voltage detection module is used for detecting the charging voltage, generating a charging signal and sending the charging signal to the charging driving module;
the charging driving module is also used for generating a driving signal according to the charging signal and sending the driving signal to the charging switch module.
Optionally, in the above battery charging and discharging circuit, the circuit further includes a temperature detection module connected to the charging driving module, and the temperature detection module is connected to the first interface module and the second interface module respectively;
the temperature detection module is used for detecting the temperatures of the first interface module and the interface module, generating a temperature signal and sending the temperature signal to the charging driving module;
the charging driving module is also used for generating a driving signal according to the temperature signal and sending the driving signal to the charging switch module.
Optionally, in the battery charging and discharging circuit, the circuit further includes an electrostatic protection module connected to the first interface module and the second interface module respectively;
the electrostatic protection module is used for providing electrostatic protection for the circuit.
Optionally, in the above battery charging and discharging circuit, the circuit further includes a fuse module connected between the first interface module and the charging switch module;
the fuse module is used for fusing when the circuit current is overloaded, and circuit protection is provided.
Optionally, in the battery charging and discharging circuit, the protection control module includes a battery protection unit and a protection switch unit that are connected to each other, the battery protection unit is connected to the battery module and the second interface module, and the protection switch unit is connected to the battery module and the second interface module;
the battery protection unit is used for detecting whether the battery module is overcharged, overdischarged or overcurrent, generating a detection signal and sending the detection signal to the protection switch unit;
and the protection switch unit is used for controlling the second interface module and the battery module to be switched on or switched off according to the detection signal.
Optionally, in the above battery charging and discharging circuit, the battery protection unit includes a battery protection chip U1;
the positive power supply input end VDD of the battery protection chip U1 is connected with the battery module through a resistor R1, the negative power supply input end VSS is connected with the battery module, and the positive power supply input end VDD of the battery protection chip U1 is also connected with the negative power supply input end VSS of the battery protection chip U1 through a capacitor C1;
the negative power supply output end V-of the battery protection chip U1 is connected with the second interface module through a resistor R2;
the discharging output terminal DO and the charging output terminal CO of the battery protection chip U1 are both connected to the protection switch unit.
Optionally, in the above battery charging and discharging circuit, the protection switch unit includes a fet U2 and a fet U3;
a first source electrode of the field effect transistor U2 is connected with the battery module, a second source electrode of the field effect transistor U2 is connected with the second interface module, and a grid electrode of the field effect transistor U3 is respectively connected with the battery protection unit;
the grid of the field-effect tube U3 is connected with the grid of the field-effect tube U2, the first source is connected with the second interface module, the second source is connected with the battery module, and the first source of the field-effect tube U3 is also connected with the second source of the field-effect tube U3 through a capacitor C2 and a capacitor C3 which are connected in series.
Optionally, in the battery charging and discharging circuit, the first interface module includes a power positive interface P +, a first power negative interface P1-, a first voltage detection interface V1, and/or a first temperature detection interface T1;
the second interface module comprises a second voltage detection interface V2, a second temperature detection interface T2, a battery anode interface B1+ and/or a second power supply cathode interface P-;
the positive power interface P + passes through charge switch module with battery module's anodal connection, first power negative pole interface P1-with second power negative pole interface P-is connected, first voltage detection interface V1 with second voltage detection interface V2 all is connected with the voltage detection module, first temperature detection interface T1 with second temperature detection interface T2 all is connected with the temperature detection module, battery positive pole interface B1+ with battery module's anodal connection.
In a second aspect, the utility model further provides a battery, which includes a casing, a pad disposed on the casing, and a circuit board disposed in the casing, wherein the circuit board is connected to the pad, and the circuit board is provided with the above battery charging and discharging circuit.
One or more technical solutions provided by the present invention may have the following advantages or at least achieve the following technical effects:
according to the battery charging and discharging circuit and the battery, the first interface module receives the charging voltage of an external power supply, the charging driving module generates a driving signal after detecting the charging voltage, the charging switch module controls the circuit to be connected and conducted according to the driving signal, the first interface module can input the charging voltage into the battery module to charge the battery, and meanwhile, the protection control module controls the connection between the second interface module and the battery module to be cut off, so that the purposes of charging and protecting the battery are achieved; or after the battery module releases the discharge voltage, the first interface module outputs the discharge voltage to the external electronic equipment to discharge the battery, and meanwhile, the second interface module can charge the battery module to achieve the purpose of simultaneously discharging the battery and charging the battery. The utility model divides the circuit into two loops, one of which can be charged and discharged, and the other one is not discharged after being charged, compared with the battery which only has one interface for input or output in the prior art, the battery of the utility model can be charged while being discharged, can meet the use in some special situations, has practicability and more comprehensive functions.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the structures shown in the drawings without creative efforts.
FIG. 1 is a schematic diagram of the connection of a battery charging and discharging circuit according to the present invention;
FIG. 2 is a schematic circuit diagram of a battery charging and discharging circuit according to the present invention;
FIG. 3 is another connection diagram of the battery charging/discharging circuit according to the present invention.
The implementation, functional features and advantages of the objects of the present invention will be further explained with reference to the accompanying drawings.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
It is to be noted that, in the present invention, the terms "comprises", "comprising" or any other variation thereof are intended to cover a non-exclusive inclusion, such that an apparatus or system including a series of elements includes not only those elements but also other elements not explicitly listed or inherent to such apparatus or system. Without further limitation, an element defined by the phrase "comprising … …" does not exclude the presence of other like elements in a device or system that comprises the element. In the present invention, unless expressly stated or limited otherwise, the terms "connected," "secured," and the like are to be construed broadly, and for example, "connected" may be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium; either internally or in interactive relation.
In addition, in the present invention, if there is a description referring to "first", "second", etc., the description of "first", "second", etc. is for descriptive purposes only and is not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the present invention, suffixes such as "module", "part", or "unit" used to represent elements are used only for facilitating the description of the present invention, and have no specific meaning in themselves. Thus, "module", "component" or "unit" may be used mixedly.
The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations. In addition, the technical solutions of the respective embodiments may be combined with each other, but must be realized by those skilled in the art, and when the technical solutions are contradictory or cannot be realized, such a combination of technical solutions should be considered to be absent and not be within the protection scope of the present invention.
The prior art is analyzed and found that many external batteries used for electronic equipment such as digital products, scanning equipment and detection equipment cannot discharge to the electronic equipment when the lithium batteries are charged, so that the use is limited under some special conditions. For example, when the external battery and the mobile phone are not powered, and the input line of the external battery connecting plug is inconsistent with the output line of the mobile phone, that is, the mobile phone cannot be directly connected with the plug for charging the mobile phone, if the external battery can be charged and discharged at the same time, the user can use the mobile phone as soon as possible, so as to solve the dilemma that the payment cannot be performed. However, the currently available external batteries cannot be charged and discharged simultaneously, and therefore, it is necessary to provide an external battery capable of being charged and discharged simultaneously.
In view of the technical problem that the battery in the prior art can not be charged and discharged simultaneously, the utility model provides a battery charging and discharging circuit, which has the following general idea:
the circuit comprises a battery module, a charging switch module and a protection control module which are respectively connected with the battery module, a first interface module and a charging driving module which are respectively connected with the charging switch module, and a second interface module which is connected with the protection control module, wherein the first interface module and the second interface module are respectively connected with the charging driving module, and the second interface module is connected with the battery module; the first interface module is used for inputting the received charging voltage into the battery module and outputting a discharging voltage; the second interface module is used for inputting the received charging voltage into the battery module; the charging driving module is used for generating a driving signal according to the charging voltage and sending the driving signal to the charging switch module; the charging switch module is used for controlling the connection between the first interface module and the battery module to be switched on or off according to the driving signal; the battery module is used for receiving the charging voltage, releasing the discharging voltage and sending the discharging voltage to the first interface module; the protection control module is used for controlling the connection between the second interface module and the battery module to be switched on or switched off according to the state of the battery module.
By the technical scheme, the purposes of battery charging and protection and the purpose of simultaneous battery discharging and battery charging can be realized. The utility model divides the circuit into two loops, one of which can be charged and discharged, and the other one is not discharged after being charged, compared with the battery which only has one interface for input or output in the prior art, the battery of the utility model can be charged while being discharged, can meet the use in some special situations, has practicability and more comprehensive functions.
Example one
Referring to fig. 1 and 2, fig. 1 is a schematic connection diagram of a first embodiment of a battery charging and discharging circuit according to the present invention, and fig. 2 is a schematic circuit diagram of the battery charging and discharging circuit according to the present invention; the present embodiment provides a battery charging and discharging circuit. As shown in fig. 1, the circuit includes:
the battery protection system comprises a battery module, a charging switch module and a protection control module which are respectively connected with the battery module, a first interface module and a charging driving module which are respectively connected with the charging switch module, and a second interface module which is connected with the protection control module, wherein the first interface module and the second interface module are respectively connected with the charging driving module, and the second interface module is connected with the battery module;
the first interface module is used for inputting the received charging voltage into the battery module and outputting a discharging voltage;
the second interface module is used for inputting the received charging voltage into the battery module;
the charging driving module is used for generating a driving signal according to the charging voltage and sending the driving signal to the charging switch module;
the charging switch module is used for controlling the connection between the first interface module and the battery module to be switched on or off according to the driving signal;
the battery module is used for receiving the charging voltage, releasing the discharging voltage and sending the discharging voltage to the first interface module;
the protection control module is used for controlling the connection between the second interface module and the battery module to be switched on or switched off according to the state of the battery module.
The whole circuit has two loops, and the specific working process is as follows:
the first interface module receives charging voltage sent by an external power supply, the charging driving module generates a driving signal after detecting the charging voltage and sends the driving signal to the charging switch module, the charging switch module controls the connection and conduction of the first interface module and the battery module according to the driving signal, and the battery module can receive the charging voltage input by the first interface module to realize the charging of the first loop; at the moment, the protection control module detects that the battery module is in a charging state, controls the connection between the second interface module and the battery module to be cut off, and does not switch on a second loop and does not discharge electricity;
under the connection state of the first loop, the battery module releases discharge voltage, the discharge voltage reaches the first interface module through the loop, and the first interface module outputs the discharge voltage to the external electronic equipment to realize the discharge of the first loop; at the moment, the protection control module detects that the battery module is in a discharging state, and controls the connection and conduction of the second interface module and the battery module under the condition that the battery is not abnormal, the second loop is connected, and the second interface module directly supplies power to the battery module so that the battery module can continuously release discharging voltage to output to the first interface module, and the charging of the second loop is realized; thus, the effect of charging and discharging is realized.
Specifically, as shown in fig. 2, the first interface module includes a power positive interface P +, a first power negative interface P1-, and a first voltage detection interface V1;
the second interface module comprises a second voltage detection interface V2, a battery anode interface B1+ and a second power supply cathode interface P-;
the power supply positive electrode interface P + is connected with the positive electrode of the battery module through the charging switch module, the first power supply negative electrode interface P1-is connected with the second power supply negative electrode interface P-, the first voltage detection interface V1 and the second voltage detection interface V2 are connected with the charging driving module, and the battery positive electrode interface B1+ is connected with the positive electrode of the battery module.
In a specific implementation, the first power negative interface P1-and the second power negative interface P-may be located at different positions of the battery, but both need to form a loop with the power positive interface P +.
In this embodiment, the positive power interface P + is connected to the charging switch module through an inductor L1, and the negative power interface P-is connected to the protection control module through an inductor L2.
Specifically, the charging driving module includes a transistor Q1;
the base electrode of the triode Q1 is connected with a first voltage detection interface V1 in the first interface module and a second voltage detection interface V2 in the second interface module, the emitter electrode is connected with a second power supply negative electrode interface P-in the second interface module, and the collector electrode is connected with the charging switch module.
In this embodiment, the transistor Q1 is a MMBT3904 transistor.
Specifically, the charging switch module comprises a field effect transistor U4;
the source electrode of the field effect transistor U4 is connected with the battery module, the drain electrode is connected with the first interface module, the grid electrode is connected with the charging driving module, and the source electrode of the field effect transistor U4 is also connected with the grid electrode of the field effect transistor U4 through a resistor R3.
In this embodiment, the fet U4 is a fet with a model of TDM 3205.
Specifically, the battery module adopts a lithium battery, and can store electric energy and release electric energy. The positive electrode B + of the lithium battery may be directly connected to the battery positive electrode interface B1+ of the second interface module.
In this embodiment, the circuit further includes a capacitor C4 and a capacitor C5, one end of the capacitor C4 is connected to the positive electrode B + of the lithium battery, the other end of the capacitor C4 is connected to one end of the capacitor C5, and the other end of the capacitor C5 is connected to the second power source negative electrode interface P-in the second interface module.
Specifically, the protection control module comprises a battery protection unit and a protection switch unit which are connected with each other, the battery protection unit is respectively connected with the battery module and the second interface module, and the protection switch unit is respectively connected with the battery module and the second interface module;
the battery protection unit is used for detecting whether the battery module is overcharged, overdischarged or overcurrent, generating a detection signal and sending the detection signal to the protection switch unit;
and the protection switch unit is used for controlling the second interface module and the battery module to be switched on or switched off according to the detection signal.
More specifically, the battery protection unit includes a battery protection chip U1;
the positive power supply input end VDD of the battery protection chip U1 is connected with the battery module through a resistor R1, the negative power supply input end VSS is connected with the battery module, and the positive power supply input end VDD of the battery protection chip U1 is also connected with the negative power supply input end VSS of the battery protection chip U1 through a capacitor C1;
the negative power supply output end V-of the battery protection chip U1 is connected with the second interface module through a resistor R2;
the discharging output terminal DO and the charging output terminal CO of the battery protection chip U1 are both connected to the protection switch unit.
In this embodiment, the battery protection chip U1 is an S-8261DAM series battery protection chip.
More specifically, the protection switch unit comprises a field effect transistor U2 and a field effect transistor U3;
a first source electrode of the field effect transistor U2 is connected with the battery module, a second source electrode of the field effect transistor U2 is connected with the second interface module, and a grid electrode of the field effect transistor U3 is respectively connected with the battery protection unit;
the grid of the field-effect tube U3 is connected with the grid of the field-effect tube U2, the first source is connected with the second interface module, the second source is connected with the battery module, and the first source of the field-effect tube U3 is also connected with the second source of the field-effect tube U3 through a capacitor C2 and a capacitor C3 which are connected in series.
In this embodiment, the fet U2 and fet U3 are low-threshold-voltage fets, specifically, a patch N-MOS transistor with model number CJCD 2004.
In this embodiment, the battery protection chip U1, in cooperation with the fet U2 and fet U3, may implement the overcharge, overdischarge, and battery short-circuit protection functions of a single lithium battery, and the fet U2 and fet U3 may be used as electronic switches.
When the battery protection chip U1 normally works, the discharging output terminal DO and the charging output terminal CO of the battery protection chip U1 are both high level, the U2 and the U3 are conducted, at the moment, the cathode B-of the lithium battery is directly communicated with the cathode of the power supply, and the battery has voltage output. When the lithium battery is overdischarged, the U1 generates a corresponding detection signal, the output of the DO end is 0V, the U2 is cut off, at the moment, the negative electrode B-of the lithium battery is disconnected with the negative electrode of a power supply, and the battery does not output voltage; when the lithium battery is overcharged, the U1 generates a corresponding detection signal, the output of the CO end is 0V, the U3 is cut off, and the lithium battery is stopped being charged; when the lithium battery is in overcurrent, namely short circuit, the U1 is internally cut off, the output is closed, and the battery has no voltage output; thus, the charging and discharging protection of the battery is realized.
In the battery charging and discharging circuit of the embodiment, the first interface module receives the charging voltage of the external power supply, the charging driving module generates a driving signal after detecting the charging voltage, the charging switch module controls the circuit to be connected and conducted according to the driving signal, the first interface module can input the charging voltage into the battery module to charge the battery, and meanwhile, the protection control module controls the second interface module to be disconnected from the battery module, so that the purposes of charging and protecting the battery are achieved; or after the battery module releases the discharge voltage, the first interface module outputs the discharge voltage to the external electronic equipment to discharge the battery, and meanwhile, the second interface module can charge the battery module to achieve the purpose of simultaneously discharging the battery and charging the battery. The utility model divides the circuit into two loops, one of which can be charged and discharged, and the other one is not discharged after being charged, compared with the battery which only has one interface for input or output in the prior art, the battery of the utility model can be charged while being discharged, can meet the use in some special situations, has practicability and more comprehensive functions.
Example two
Referring to fig. 3, fig. 3 is a schematic structural diagram of a battery charging/discharging circuit according to a second embodiment of the present invention; on the basis of the first embodiment, the present embodiment provides a battery charging/discharging circuit.
Furthermore, the circuit further comprises a voltage detection module connected with the charging driving module, and the voltage detection module is respectively connected with the first interface module and the second interface module;
the voltage detection module is used for detecting the charging voltage, generating a charging signal and sending the charging signal to the charging driving module;
the charging driving module is also used for generating a driving signal according to the charging signal and sending the driving signal to the charging switch module.
Specifically, the first interface module comprises a power supply positive electrode interface P +, a first power supply negative electrode interface P1-and a first voltage detection interface V1;
the second interface module comprises a second voltage detection interface V2, a battery anode interface B1+ and a second power supply cathode interface P-;
the power supply positive electrode interface P + is connected with the positive electrode of the battery module through the charging switch module, the first power supply negative electrode interface P1-is connected with the second power supply negative electrode interface P-, the first voltage detection interface V1 and the second voltage detection interface V2 are connected with the voltage detection module, and the battery positive electrode interface B1+ is connected with the positive electrode of the battery module.
Specifically, the voltage detection module comprises a resistor R5 and a resistor R4;
one end of the resistor R5 is respectively connected with the first voltage detection interface V1 of the first interface module and the second voltage detection interface V2 of the second interface module, the other end of the resistor R5 is respectively connected with the base of the triode Q1 and one end of the resistor R4, and the other end of the resistor R4 is connected with the second power supply negative electrode interface P-of the second interface module.
The battery charging and discharging circuit of the embodiment generates the charging signal and sends the charging signal to the charging driving module after the voltage detection module detects that the first interface module or the second interface module has the charging voltage input and the charging voltage is not abnormal, the charging driving module generates the driving signal according to the charging signal and sends the driving signal to the charging switch module to enable the charging switch module to be switched on, and therefore the purpose of inputting the charging voltage to charge the battery module through the first interface module or the second interface module is achieved. The voltage detection module is used for detecting the voltage, so that the damage of the device caused by overhigh voltage can be prevented.
EXAMPLE III
In addition to the first or second embodiment, the present embodiment provides a battery charging/discharging circuit. Furthermore, the circuit further comprises a temperature detection module connected with the charging driving module, and the temperature detection module is respectively connected with the first interface module and the second interface module;
the temperature detection module is used for detecting the temperatures of the first interface module and the interface module, generating a temperature signal and sending the temperature signal to the charging driving module;
the charging driving module is also used for generating a driving signal according to the temperature signal and sending the driving signal to the charging switch module.
Specifically, the first interface module comprises a power supply positive electrode interface P +, a first power supply negative electrode interface P1-, a first voltage detection interface V1 and a first temperature detection interface T1;
the second interface module comprises a second voltage detection interface V2, a second temperature detection interface T2, a battery anode interface B1+ and a second power supply cathode interface P-;
the positive power interface P + passes through the charge switch module with the anodal of battery module is connected, first power negative electrode interface P1-with second power negative electrode interface P-is connected, first voltage detection interface V1 with second voltage detection interface V2 all with voltage detection module connects, first temperature detection interface T1 with second temperature detection interface T2 all with temperature detection module connects, battery positive electrode interface B1+ with battery module's anodal is connected.
Specifically, the temperature detection module comprises a thermistor TR1 and a thermistor RT 2;
one end of the thermistor RT1 is connected with a first temperature detection interface T1 of the first interface module, and the other end of the thermistor RT1 is connected with a second power supply negative electrode interface P-of the second interface module;
one end of the thermistor RT2 is connected with the second temperature detection interface T2 of the second interface module, and the other end is connected with the second power supply negative electrode interface P-of the second interface module.
The battery charging and discharging circuit of this embodiment detects through the temperature detection module and carries out temperature detection to first interface module or second interface module, prevents that the circuit temperature is too high, causes the device to damage.
Example four
On the basis of any of the first to third embodiments, the present embodiment further provides a battery charging/discharging circuit.
Furthermore, the circuit also comprises an electrostatic protection module respectively connected with the first interface module and the second interface module;
the electrostatic protection module is used for providing electrostatic protection for the circuit.
Specifically, the first interface module includes a power positive interface P +, a first power negative interface P1-, a first voltage detection interface V1 and/or a first temperature detection interface T1;
the second interface module comprises a second voltage detection interface V2, a second temperature detection interface T2, a battery anode interface B1+ and/or a second power supply cathode interface P-;
the positive power interface P + passes through the charge switch module with the anodal of battery module is connected, first power negative electrode interface P1-with second power negative electrode interface P-is connected, first voltage detection interface V1 with second voltage detection interface V2 all with voltage detection module connects, first temperature detection interface T1 with second temperature detection interface T2 all with temperature detection module connects, battery positive electrode interface B1+ with battery module's anodal is connected.
Specifically, the electrostatic protection module includes ESD electrostatic diodes, and in this embodiment, the electrostatic protection module includes four ESD electrostatic diodes, the electrostatic diode D1 is connected in parallel to the power source positive electrode interface P +, the electrostatic diode D2 is connected in parallel to the first voltage detection interface V1 and the second voltage detection interface V2, the electrostatic diode D3 is connected in parallel to the first temperature detection interface T1, and the electrostatic diode D4 is connected in parallel to the second temperature detection interface T2.
When the circuit works normally, the static diode is in a cut-off state, namely a high-resistance state, the normal work of the circuit is not influenced, when the circuit has abnormal overvoltage and reaches the breakdown voltage of the circuit, the circuit is rapidly changed from the high-resistance state to a low-resistance state, a low-resistance conduction path is provided for instant current, and meanwhile, the abnormal high voltage is clamped within a safety level, so that the circuit is protected, and when the abnormal overvoltage disappears and then returns to the high-resistance state, the circuit returns to the normal work.
The battery charging and discharging circuit of the embodiment adds the function of absorbing static electricity in the internal circuit, and can prevent the static electricity generated in the battery from flowing back to the electronic equipment when the battery using the circuit is discharged, so that the equipment is interfered or halted and the like.
EXAMPLE five
On the basis of any of the first to fourth embodiments, the present embodiment further provides a battery charging/discharging circuit.
Further, the circuit further comprises a fuse module connected between the first interface module and the charging switch module;
the fuse module is used for fusing when the circuit current is overloaded, and circuit protection is provided.
Specifically, the fuse module comprises a fuse F1;
one end of the fuse F1 is connected with the inductor L1, and the other end is connected with the base electrode of the field effect transistor U4.
The battery charging and discharging circuit of this embodiment provides duplicate protection, and when protection control module did not in time detect circuit anomaly, current overload in the circuit, fuse alright fusing provides further protection.
EXAMPLE six
This embodiment proposes a battery, and this battery includes the casing, sets up pad on the casing, and set up circuit board in the casing, the circuit board with the pad is connected, be provided with battery charge and discharge circuit on the circuit board.
The specific structure of the battery charging and discharging circuit refers to the above embodiments, and since this embodiment adopts all technical solutions of all the above embodiments, at least all the beneficial effects brought by the technical solutions of the above embodiments are achieved, and no further description is given here.
It should be noted that the above-mentioned serial numbers of the embodiments of the present invention are merely for description, and do not represent the merits of the embodiments.
The above description is only an alternative embodiment of the present invention, and not intended to limit the scope of the present invention, and all modifications and equivalents of the present invention, which are made by the contents of the present specification and the accompanying drawings, or directly or indirectly applied to other related technical fields, are included in the scope of the present invention.
Claims (10)
1. A battery charging and discharging circuit is characterized by comprising a battery module, a charging switch module and a protection control module which are respectively connected with the battery module, a first interface module and a charging driving module which are respectively connected with the charging switch module, and a second interface module which is connected with the protection control module, wherein the first interface module and the second interface module are respectively connected with the charging driving module, and the second interface module is connected with the battery module;
the first interface module is used for inputting the received charging voltage into the battery module and outputting a discharging voltage;
the second interface module is used for inputting the received charging voltage into the battery module;
the charging driving module is used for generating a driving signal according to the charging voltage and sending the driving signal to the charging switch module;
the charging switch module is used for controlling the connection between the first interface module and the battery module to be switched on or off according to the driving signal;
the battery module is used for receiving the charging voltage, releasing the discharging voltage and sending the discharging voltage to the first interface module;
the protection control module is used for controlling the connection between the second interface module and the battery module to be switched on or switched off according to the state of the battery module.
2. The battery charging and discharging circuit according to claim 1, further comprising a voltage detection module connected to the charging driving module, wherein the voltage detection module is connected to the first interface module and the second interface module respectively;
the voltage detection module is used for detecting the charging voltage, generating a charging signal and sending the charging signal to the charging driving module;
the charging driving module is also used for generating a driving signal according to the charging signal and sending the driving signal to the charging switch module.
3. The battery charging and discharging circuit according to claim 1, further comprising a temperature detection module connected to the charging driving module, wherein the temperature detection module is connected to the first interface module and the second interface module respectively;
the temperature detection module is used for detecting the temperatures of the first interface module and the interface module, generating a temperature signal and sending the temperature signal to the charging driving module;
the charging driving module is also used for generating a driving signal according to the temperature signal and sending the driving signal to the charging switch module.
4. The battery charging and discharging circuit of claim 1, further comprising an electrostatic protection module connected to the first interface module and the second interface module, respectively;
the electrostatic protection module is used for providing electrostatic protection for the circuit.
5. The battery charging and discharging circuit of claim 1, further comprising a fuse module connected between the first interface module and the charging switch module;
the fuse module is used for fusing when the circuit current is overloaded, and circuit protection is provided.
6. The battery charging and discharging circuit according to claim 1, wherein the protection control module comprises a battery protection unit and a protection switch unit connected with each other, the battery protection unit is connected with the battery module and the second interface module respectively, and the protection switch unit is connected with the battery module and the second interface module respectively;
the battery protection unit is used for detecting whether the battery module is overcharged, overdischarged or overcurrent, generating a detection signal and sending the detection signal to the protection switch unit;
and the protection switch unit is used for controlling the second interface module and the battery module to be switched on or switched off according to the detection signal.
7. The battery charging and discharging circuit according to claim 6, wherein the battery protection unit comprises a battery protection chip U1;
the positive power supply input end VDD of the battery protection chip U1 is connected with the battery module through a resistor R1, the negative power supply input end VSS is connected with the battery module, and the positive power supply input end VDD of the battery protection chip U1 is also connected with the negative power supply input end VSS of the battery protection chip U1 through a capacitor C1;
the negative power supply output end V-of the battery protection chip U1 is connected with the second interface module through a resistor R2;
the discharging output terminal DO and the charging output terminal CO of the battery protection chip U1 are both connected to the protection switch unit.
8. The battery charging and discharging circuit according to claim 6, wherein the protection switching unit comprises a fet U2 and a fet U3;
a first source electrode of the field effect transistor U2 is connected with the battery module, a second source electrode of the field effect transistor U2 is connected with the second interface module, and a grid electrode of the field effect transistor U3 is respectively connected with the battery protection unit;
the grid of the field-effect tube U3 is connected with the grid of the field-effect tube U2, the first source is connected with the second interface module, the second source is connected with the battery module, and the first source of the field-effect tube U3 is also connected with the second source of the field-effect tube U3 through a capacitor C2 and a capacitor C3 which are connected in series.
9. The battery charging and discharging circuit according to any one of claims 1 to 8,
the first interface module comprises a power supply positive electrode interface P +, a first power supply negative electrode interface P1-, a first voltage detection interface V1 and/or a first temperature detection interface T1;
the second interface module comprises a second voltage detection interface V2, a second temperature detection interface T2, a battery anode interface B1+ and/or a second power supply cathode interface P-;
the positive power interface P + passes through charge switch module with battery module's anodal connection, first power negative pole interface P1-with second power negative pole interface P-is connected, first voltage detection interface V1 with second voltage detection interface V2 all is connected with the voltage detection module, first temperature detection interface T1 with second temperature detection interface T2 all is connected with the temperature detection module, battery positive pole interface B1+ with battery module's anodal connection.
10. A battery comprising a case, a land provided on the case, and a circuit board provided in the case, the circuit board being connected to the land, the circuit board being provided with a battery charging and discharging circuit according to any one of claims 1 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122112782.6U CN216086205U (en) | 2021-09-01 | 2021-09-01 | Battery charging and discharging circuit and battery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122112782.6U CN216086205U (en) | 2021-09-01 | 2021-09-01 | Battery charging and discharging circuit and battery |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216086205U true CN216086205U (en) | 2022-03-18 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202122112782.6U Active CN216086205U (en) | 2021-09-01 | 2021-09-01 | Battery charging and discharging circuit and battery |
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| Country | Link |
|---|---|
| CN (1) | CN216086205U (en) |
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2021
- 2021-09-01 CN CN202122112782.6U patent/CN216086205U/en active Active
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