CN114256954A - Control circuit and battery - Google Patents
Control circuit and battery Download PDFInfo
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- CN114256954A CN114256954A CN202011002930.2A CN202011002930A CN114256954A CN 114256954 A CN114256954 A CN 114256954A CN 202011002930 A CN202011002930 A CN 202011002930A CN 114256954 A CN114256954 A CN 114256954A
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- 238000004891 communication Methods 0.000 claims description 39
- 239000003990 capacitor Substances 0.000 description 40
- 238000010586 diagram Methods 0.000 description 20
- 238000004519 manufacturing process Methods 0.000 description 11
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- 238000000034 method Methods 0.000 description 6
- 238000013459 approach Methods 0.000 description 2
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J9/00—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting
- H02J9/005—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting using a power saving mode
- H02J9/007—Detection of the absence of a load
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/0063—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with circuits adapted for supplying loads from the battery
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
- H01M10/425—Structural combination with electronic components, e.g. electronic circuits integrated to the outside of the casing
- H01M2010/4271—Battery management systems including electronic circuits, e.g. control of current or voltage to keep battery in healthy state, cell balancing
Abstract
The application provides a control circuit and a battery. The control circuit is applied to a battery, and the battery comprises a battery core, a positive output end and a negative output end; the control circuit comprises a first switch, a second switch, a power-on control unit and a battery protection unit; the first switch is connected between the negative electrode of the battery cell and the negative output end, and the power-on control unit is connected with the second switch; a power supply end of the battery protection unit is connected to the positive electrode of the battery cell through a second switch, and a first control end of the battery protection unit is connected to the first switch; when the battery is not connected with the load, the first switch is disconnected; when the battery is connected with a load, the power-on control unit works to switch on the second switch, and then a path between the power supply end of the battery protection unit and the positive electrode of the battery core is switched on, so that the battery protection unit works to switch on the first switch, and a path between the negative electrode of the battery core and the negative output end is switched on. The control circuit can effectively avoid the problem of self power consumption of the battery, does not increase the volume of the battery and can save the cost.
Description
Technical Field
The invention relates to the technical field of batteries, in particular to a control circuit and a battery.
Background
In order to ensure the use safety of the rechargeable battery, a control circuit is often designed in the rechargeable battery, but the control circuit needs to consume electric energy when working, so that the self-consuming problem of the battery can also occur when the battery is idle.
At present, in order to reduce the self-consumption electric quantity of the battery when the battery is idle, the power supply of the control circuit is generally turned off when the battery is idle, and the control circuit is powered on when the battery is charged or needs to be powered on corresponding loads.
However, since the above solution needs to add a corresponding control port, not only the production cost is increased, but also the volume of the battery is increased, which is not favorable for the miniaturization production of the product.
Disclosure of Invention
The application provides a control circuit and a battery, wherein the control circuit not only can enable the battery to supply power for a load, but also can effectively avoid the problem of self-power consumption of the battery when the battery is idle; meanwhile, the volume of the battery is not increased, and the production cost can be saved.
In order to solve the above technical problem, the first technical solution adopted by the present application is: the control circuit is applied to a battery, the battery comprises a battery core, a positive output end and a negative output end, and the positive output end and the negative output end are respectively connected with a power supply end of a load to supply power to the load; the positive input end of the control circuit is connected with the positive electrode of the battery core, and the control circuit comprises a first switch, a second switch, an electrifying control unit and a battery protection unit; when the battery is not connected with a load, the first switch controls a path between the negative electrode of the battery cell and the negative output end to be disconnected, and the voltage on the negative electrode of the battery cell is used as a ground voltage; the power-on control unit is connected with the second switch, wherein when the battery is connected with the load, the power-on control unit works to conduct the second switch; the battery protection unit comprises a power supply end, a grounding end and a first control end, wherein the grounding end of the battery protection unit is connected with the ground voltage, the power supply end of the battery protection unit is connected to the positive electrode of the battery cell through a second switch, and the first control end of the battery protection unit is connected to the first switch; when the second switch is switched on, a path between the power supply end of the battery protection unit and the positive electrode of the battery core is switched on, so that the battery protection unit works, the first control end of the battery protection unit sends a first control signal to switch on the first switch, and a path between the negative electrode of the battery core and the negative output end is switched on.
The power-on control unit comprises a first power-on control module and a second power-on control module; the first power-on control module is connected with the negative output end and the second switch, receives voltage on the negative output end, and is connected with the positive electrode of the battery cell through the load when the battery is connected with the load, so that the first power-on control module works to conduct the second switch; after the first switch is conducted, the first power-on control module stops working; and the second power-on control module is connected with the second switch, wherein when the second switch is switched on, the second power-on control module works, so that after the first power-on control module stops working, the second power-on control module controls the second switch to be continuously switched on.
Wherein the first power-up control module comprises a third switch; the control end of the third switch is connected to the negative output end, the first path end of the third switch is connected to the control end of the second switch, and the second path end of the third switch is connected to the ground voltage.
The second power-on control module comprises a fourth switch, wherein a control end of the fourth switch is connected to a first node between the second switch and a power supply end of the battery protection unit, a first path end of the fourth switch is connected to a control end of the second switch, and a second path end of the fourth switch is connected to the ground voltage; when the second switch is turned on, the control terminal of the fourth switch receives the voltage on the positive electrode of the battery cell through the turned-on second switch, so that the fourth switch is turned on, and the second power-on control module works to enable the second switch to be turned on continuously.
Wherein the second power-on control module further comprises a resistor, and the control terminal of the fourth switch is connected to the first node between the second switch and the power supply terminal of the battery protection unit through the resistor.
The battery protection unit further comprises a data port and a second control port, wherein the data port is used for being connected with the data port of the load to carry out data communication when the battery is connected with the load; when the real-time duration of the data communication between the data port and the load is interrupted exceeds the preset duration, or when the data received by the data port indicates that the real-time duration that the working current of the battery cell is lower than the preset current value exceeds the preset duration, the battery protection unit sends a second control signal at the second control port so as to enable the second power-on control module to stop working.
Wherein, the power-on control unit further comprises a power-off control module; the power-off control module is connected with a second control end of the battery protection unit and the second power-on control module, and when the second control end sends a second control signal, the power-off control module works to enable the second power-on control module to stop working.
Wherein the power-down control module comprises a fifth switch; the control end of the fifth switch is connected with the second control end of the battery protection unit, the first path end of the fifth switch is connected with the second power-on control module, and the second path end of the fifth switch is connected with the ground voltage.
The first switch, the third switch, the fourth switch and the fifth switch are respectively N-type MOS tubes, and the second switch is a P-type MOS tube.
In order to solve the above technical problem, the second technical solution adopted by the present application is: there is provided a battery including the control circuit as described above.
According to the control circuit and the battery, the first switch and the second switch are arranged, the first switch is connected between the negative electrode of the battery cell and the negative output end of the battery, and meanwhile, when the battery is not connected with a load, the first switch is disconnected to disconnect a path between the negative electrode of the battery cell and the negative output end, so that the problem of self power consumption of the battery when the battery is idle is effectively avoided; in addition, the power-on control unit is arranged and is connected with the second switch, so that when the battery is connected with the load, the power-on control unit works to conduct the second switch; in addition, the battery protection unit is arranged, the grounding end of the battery protection unit is connected with the ground voltage, the power supply end of the battery protection unit is connected to the positive electrode of the battery core through the second switch, the first control end of the battery protection unit is connected to the first switch, so that when the second switch is switched on, a path between the power supply end of the battery protection unit and the positive electrode of the battery core is switched on, the battery protection unit works, meanwhile, the first control end of the battery protection unit sends a first control signal to switch on the first switch, and further a path between the negative electrode of the battery core and the negative output end is switched on, so that power is supplied to the load; compared with the scheme that a corresponding control port needs to be additionally arranged in the prior art, the scheme does not increase the volume of the battery, and can save the production cost.
Drawings
Fig. 1 is a schematic structural diagram of a control circuit and a battery cell according to a first embodiment of the present disclosure;
fig. 2 is a schematic structural diagram of a control circuit and a battery cell according to a second embodiment of the present disclosure;
fig. 3 is a schematic structural diagram of a control circuit and a battery cell according to a third embodiment of the present application;
fig. 4 is a schematic structural diagram of a control circuit and a battery cell according to a fourth embodiment of the present disclosure;
fig. 5 is a schematic structural diagram of a control circuit according to a fifth embodiment of the present application;
fig. 6 is a schematic structural diagram of a control circuit according to an embodiment of the present application;
fig. 7 is a schematic structural diagram of a control circuit according to a sixth embodiment of the present application;
fig. 8 is a schematic structural diagram of a control circuit according to another embodiment of the present application;
FIG. 9 is a waveform diagram of various time phases of a control circuit according to an embodiment of the present application;
fig. 10 is a schematic structural diagram of a battery according to an embodiment of the present application.
Detailed Description
The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, 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 application.
The terms "first", "second" and "third" in this application are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implying any indication of the number of technical features indicated. Thus, a feature defined as "first," "second," or "third" may explicitly or implicitly include at least one of the feature. In the description of the present application, "plurality" means at least two, e.g., two, three, etc., unless explicitly specifically limited otherwise. All directional indications (such as up, down, left, right, front, and rear … …) in the embodiments of the present application are only used to explain the relative positional relationship between the components, the movement, and the like in a specific posture (as shown in the drawings), and if the specific posture is changed, the directional indication is changed accordingly. Furthermore, the terms "include" and "have," as well as any variations thereof, are intended to cover non-exclusive inclusions. For example, a process, method, system, article, or apparatus that comprises a list of steps or elements is not limited to only those steps or elements listed, but may alternatively include other steps or elements not listed, or inherent to such process, method, article, or apparatus.
Reference herein to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment can be included in at least one embodiment of the application. The appearances of the phrase in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments. It is explicitly and implicitly understood by one skilled in the art that the embodiments described herein can be combined with other embodiments.
The present application will be described in detail with reference to the accompanying drawings and examples.
Referring to fig. 1, fig. 1 is a schematic structural diagram of a control circuit and a battery cell according to a first embodiment of the present disclosure; in the present embodiment, a control circuit is provided, which is applied to a battery; the battery specifically comprises a battery cell, a positive output end P + and a negative output end P-, wherein the positive output end P + and the negative output end P-are used for being respectively connected with a power supply end of a load so as to supply power to the load when the battery is connected with the load; specifically, the positive output end P + of the battery is connected to the positive electrode of the battery cell.
In one embodiment, the control circuit includes a first switch M1, a second switch M2, a power-on control unit 11, and a battery protection unit 12; the battery protection unit 12 includes a power terminal VCC, a ground terminal GND, and a first control terminal DO.
The first switch M1 is connected between the negative electrode of the battery cell and the negative output end P-of the battery, and when the battery is not connected with a load, the first switch M1 controls the disconnection of a path between the negative electrode of the battery cell and the negative output end P-; in a specific embodiment, when the battery is not connected to a load, the first switch M1 may be in an open state to disconnect the path between the negative electrode of the battery cell and the negative output terminal P; the first switch M1 may be in an open state, specifically, the first switch is in an open state when in the first position, and is in a closed state when in the second position, which is not limited in this embodiment as long as the path between the negative electrode of the battery cell and the negative output end P "can be controlled to be open; it can be understood that after the first switch M1 controls the disconnection of the path between the negative electrode of the battery cell and the negative output terminal P-, the battery cell stops supplying power to the control circuit, thereby avoiding the self-power consumption problem of the control circuit when the battery is idle; specifically, referring to fig. 1, at this time, the voltage on the negative electrode of the cell is used as the ground voltage GND.
Wherein, the power-on control unit 11 is connected to the second switch M2, and when the battery is connected to the load, i.e. the positive output terminal P + and the negative output terminal P-of the battery are connected to the load, the power-on control unit 11 operates to control the second switch M2 to be turned on.
In one embodiment, referring to FIG. 1, the power-on control unit 11 connects the negative output terminal P-and the second switch M2, and when the battery is connected to the load, i.e., the positive output terminal P + and the negative output terminal P-of the battery are connected to the load, the power-on control unit 11 operates to turn on the second switch M2.
Specifically, referring to fig. 2, fig. 2 is a schematic structural diagram of a control circuit and a battery cell provided in a second embodiment of the present application; the power-on control unit 11 specifically includes a first power-on control module 111 and a second power-on control module 112.
Wherein, the first power-on control module 111 is connected with the negative output end P-of the battery and the second switch M2; specifically, the first power-on control module 111 receives the voltage at the negative output end P ", so as to receive a voltage control signal from the load and start to operate when the battery is connected to the load, so as to turn on the second switch M2, so as to connect to the positive electrode of the battery core; after the first switch M1 is turned on, the first power-on control module 111 stops operating, and the second power-on control module 112 starts operating.
It will be appreciated that when the battery is connected to the load, the first power-up control module 111 receives voltage from the negative output P-of the battery and operates to control the second switch M2 to conduct.
In a particular embodiment, the first power-up control module 111 comprises a third switch M3; specifically, the third switch M3 includes a control terminal, a first path terminal and a second path terminal; wherein a control terminal of the third switch M3 is connected to the negative output terminal P of the battery, a first path terminal of the third switch M3 is connected to a control terminal of the second switch M2, and a second path terminal of the third switch M3 is connected to the ground voltage GND.
Wherein, the second power-on control module 112 is connected with the second switch M2; in a specific implementation process, when the second switch M2 is turned on, the second power-on control module 112 starts to operate, so that after the first power-on control module 111 stops operating, the second power-on control module 112 controls the second switch M2 to be continuously turned on, and further the first switch M1 is continuously turned on to continuously supply power to the load.
In a specific embodiment, the second power-on control module 112 specifically includes a fourth switch M4, the fourth switch M4 including a control terminal, a first path terminal and a second path terminal; wherein a control terminal of the fourth switch M4 is connected to the first node between the second switch M2 and the power supply terminal VCC of the battery protection unit 12, a first path terminal of the fourth switch M4 is connected to the control terminal of the second switch M2, and a second path terminal of the fourth switch M4 is connected to the ground voltage GND. Specifically, when the second switch M2 is turned on, the control terminal of the fourth switch M4 receives the voltage at the positive electrode of the battery cell through the turned-on second switch M2, so that the fourth switch M4 is turned on, and at this time, the second power-on control module 112 operates and controls the second switch M2 to continue to be turned on.
Further, in an embodiment, referring to fig. 3, fig. 3 is a schematic structural diagram of a control circuit and a battery cell provided in a third embodiment of the present application; specifically, the second power-on control module 112 further includes a resistor; specifically, the control terminal of the fourth switch M4 is connected to the first node between the second switch M2 and the power supply terminal VCC of the battery protection unit 12 through a resistor.
The battery protection unit 12 may be a unit circuit having one or more functions of battery overvoltage or undervoltage protection, overcurrent protection, electric quantity detection, battery management, and the like; specifically, the ground terminal GND of the battery protection unit 12 is connected to the ground voltage GND, the power terminal VCC of the battery protection unit 12 is connected to the positive electrode of the battery cell through the second switch M2, and the first control terminal DO of the battery protection unit 12 is connected to the first switch M1; specifically, when the second switch M2 is turned on, a path between the power supply terminal VCC of the battery protection unit 12 and the positive electrode of the battery cell is turned on, so that the battery protection unit 12 operates; and after the battery protection unit 12 is powered on, the first control end DO of the battery protection unit 12 sends a first control signal to control the first switch M1 to be turned on, so as to turn on a path between the negative electrode of the battery cell and the negative output end P-, so as to supply power to the load.
In a specific embodiment, referring to fig. 4, fig. 4 is a schematic structural diagram of a control circuit and a battery cell provided in a fourth embodiment of the present application; the battery protection unit 12 further includes a data port DA for connecting with a data port of a load to perform data communication therebetween when the battery is connected with the load, and a second control port OFF.
In a specific embodiment, when the real-time duration of the data port DA of the battery protection unit 12 interrupting the data communication with the load exceeds the preset duration, that is, the real-time duration of the data port DA of the battery protection unit 12 interrupting the data communication with the data port of the load exceeds the preset duration, or when the data received by the data port DA indicates that the real-time duration of the working current of the battery core being lower than the preset current value exceeds the preset duration, the battery protection unit 12 sends a second control signal at the second control port OFF to stop the second power-on control module 112 from working, so that the second switch M2 is turned OFF, and the first switch M1 is controlled to be turned OFF, so that the battery stops supplying power to the load, thereby saving the electrical resources, reducing the power consumption of the battery protection unit 12, and enabling the battery to enter a power saving state; simultaneously, compare in prior art and need add the scheme of corresponding control port in addition, above-mentioned scheme of this application not only can make the battery supply power for the load, and can effectively avoid the battery to appear the battery consumable problem when idle, can not increase the volume of battery simultaneously, can practice thrift the cost.
Specifically, referring to fig. 4, the power-on control unit 11 further includes a power-off control module 113, and the battery protection unit 12 controls the second power-on control module 112 to stop working through the power-off control module 113; specifically, the power-OFF control module 113 is connected to the second control port OFF of the battery protection unit 12 and the second power-on control module 112, and when the second control port OFF sends a second control signal, the power-OFF control module 113 contacts the second control signal and starts to operate, so that the second power-on control module 112 stops operating.
Specifically, in a specific embodiment, the power-down control module 113 includes a fifth switch M5, the fifth switch M5 includes a control terminal, a first path terminal and a second path terminal; wherein a control terminal of the fifth switch M5 is connected to the second control port OFF of the battery protection unit 12, a first path terminal of the fifth switch M5 is connected to the second power-on control module 112, and a second path terminal of the fifth switch M5 is connected to the ground voltage GND.
Specifically, the first switch M1, the third switch M3, the fourth switch M4 and the fifth switch M5 are N-type MOS transistors, respectively, and the second switch M2 is a P-type MOS transistor. Of course, in other embodiments, the first switch M1, the second switch M2, the third switch M3, the fourth switch M4, and the fifth switch M5 may also be transistors or relays.
In the control circuit provided by this embodiment, the first switch M1 and the second switch M2 are provided, the first switch M1 is connected between the negative electrode of the battery cell and the negative output end P-, and the first switch M1 is turned off to disconnect the path between the negative electrode of the battery cell and the negative output end P-when the battery is not connected with a load, so that the problem of self-power consumption of the battery when the battery is idle is effectively avoided; in addition, by providing the power-on control unit 11 and connecting the power-on control unit 11 to the negative output terminal P-and the second switch M2, when the battery is connected to the load, the power-on control unit 11 operates to turn on the second switch M2; in addition, by providing the battery protection unit 12, and connecting the ground terminal GND of the battery protection unit 12 to the ground voltage GND, the power terminal VCC of the battery protection unit 12 is connected to the positive electrode of the battery cell through the second switch M2, and the first control terminal DO of the battery protection unit 12 is connected to the first switch M1, so that when the second switch M2 is turned on, the path between the power terminal VCC of the battery protection unit 12 and the positive electrode of the battery cell is turned on, so that the battery protection unit 12 operates, and at the same time, the first control terminal DO of the battery protection unit 12 sends a first control signal to turn on the first switch M1, so as to turn on the path between the negative electrode of the battery cell and the negative output terminal P —, so as to supply power to the load; compared with the scheme that a corresponding control port needs to be additionally arranged in the prior art, the scheme does not increase the volume of the battery, and can save the production cost.
In this embodiment, a battery is provided, which includes a battery cell, a positive output terminal, a negative output terminal, and a control circuit.
The control circuit is the control circuit according to any of the embodiments, and the connection relationship between the control circuit and the electric core, the positive output end and the negative output end, and other structures and functions are the same as or similar to the connection relationship between the control circuit provided in the embodiments and the electric core, the positive output end P +, and the negative output end P-, and other structures and functions, and the same or similar technical effects can be achieved.
According to the battery provided by the embodiment, when the battery is not connected with a load, the first switch is disconnected to disconnect the path between the negative electrode of the battery core and the negative output end, so that the problem of self-power consumption of the battery when the battery is idle is effectively avoided; meanwhile, when the battery is connected with a load, the first switch is controlled to be closed so that the battery supplies power to the load, and the control circuit can be disconnected with the battery cell in time when the real-time duration of the idle battery or the data communication interruption with the load reaches a preset duration or when the real-time duration of the working current of the battery cell lower than a preset current value exceeds the preset duration, so that the battery enters a power-saving state, the power resource is saved, and the problem of self power consumption of the battery is avoided; in addition, the battery does not need to be additionally provided with a corresponding control port, so that the volume of the battery is not increased, and the production cost can be saved.
In another embodiment, referring to fig. 5, fig. 5 is a schematic structural diagram of a control circuit provided in a fifth embodiment of the present application; in the present embodiment, a control circuit is provided; the difference from the above embodiment is that the control circuit further comprises a communication data port DA 'connected to the data port DA on the battery protection unit 12 for data communication with the load through the communication data port DA' when the load is connected; further, in this embodiment, unlike the first embodiment described above, the power-on control unit 11 specifically includes an auxiliary circuit, a first control circuit, and a second control circuit.
The power-on control unit 11 is connected to the negative output terminal P-and the communication data port DA ', and is configured to sequentially receive a first control signal from the negative output terminal P-or the communication data port DA' and communicate the positive output terminal P + with the second switch M2 under driving of the first control signal when the positive output terminal P + and the negative output terminal P-are connected to the load, so that the second switch M2 can receive a second control signal from the positive output terminal P + and is switched on under driving of the second control signal, so as to connect the battery protection unit 12 with the positive output terminal P + through the second switch M2.
Specifically, after the positive output end P + and the negative output end P-are connected to the corresponding ends of the load, and the negative electrode of the battery cell is not connected to the negative output end P-, the power-on control unit 11 receives a first control signal from the negative output end P-and is connected to the positive output end P + under the driving of the first control signal, so that the negative electrode of the battery cell is connected to the negative output end P-, and the battery cell supplies power to the load; after the load is powered on, the power-on control unit 11 receives the first control signal from the communication data port DA' and keeps continuously communicating with the positive output end P + under the driving of the first control signal, so as to drive the negative electrode of the battery cell to continuously communicate with the negative output end P-, so that the battery cell continuously supplies power to the load.
The battery protection unit 12 is connected with the power-on control unit 11 through a second switch M2, and is connected with the negative output end P-through a first switch M1; when the positive output end P + and the negative output end P-are connected to a load, the second switch M2 receives the second control signal from the power-on control unit 11 and connects the battery protection circuit 12 with the positive electrode of the battery core under the driving of the second control signal, after the battery protection circuit 12 is connected with the positive electrode of the battery core, the battery protection circuit 12 is powered on and sends a third control signal to the first switch M1, and the first switch M1 receives the third control signal from the battery protection unit 12 and connects the negative electrode of the battery core with the negative output end P-under the driving of the third control signal, so that the battery core supplies power to the load.
In the control circuit provided in this embodiment, the power-on control unit 11 is connected to the negative output terminal P-and the communication data port DA ', so that the power-on control unit 11 can sequentially receive the first control signals from the negative output terminal P-and the communication data port DA' after the positive output terminal P + and the negative output terminal P-are connected to the load, and the positive output terminal P + is connected to the second switch M2 under the driving of the first control signal, so that the second switch M2 can receive the second control signal from the positive output terminal P + and is turned on; in addition, by providing the battery protection unit 12, and connecting the battery protection unit 12 with the positive electrode of the battery cell through the second switch M2, and connecting the battery protection unit 12 with the negative output end P-through the first switch M1, the battery protection unit 12 is communicated with the positive electrode of the battery cell after the second switch M2 receives the second control signal from the power-on control unit 11, and the negative electrode of the battery cell is connected with the negative output end P-after the first switch M1 receives the third control signal from the battery protection unit 12, so that the battery cell supplies power to the load; after the negative electrode of the battery cell is communicated with the negative output end P-, the power-on control unit 11 can continuously receive a first control signal from the communication data port DA', so as to continuously control the communication between the negative electrode of the battery cell and the negative output end P-, and further enable the battery cell to continuously supply power to the load; compared with the scheme that a corresponding control port is additionally arranged on a control circuit in the prior art, the power supply device not only can enable the battery cell to supply power for a load, but also can effectively avoid the problem of self power consumption of the control circuit when the battery cell is idle, meanwhile, the size of a battery with the control circuit cannot be increased, and the production cost can be saved.
Referring to fig. 6, fig. 6 is a schematic structural diagram of a control circuit according to an embodiment of the present application; specifically, the power-on control unit 11 includes an auxiliary circuit, a first control circuit, and a second control circuit.
The auxiliary circuit is connected with the positive output end P + and the second switch M2 and is used for outputting a second control signal to the second switch M2 when the auxiliary circuit is conducted; the first control circuit is connected with the negative output end P-and the auxiliary circuit, and is used for receiving a first sub-control signal from the negative output end P-and conducting under the control of the first sub-control signal when the positive output end P + and the negative output end P-are connected with a load, and outputting a corresponding control signal to the auxiliary circuit to control the conduction of the auxiliary circuit after the first control circuit is conducted; the second control circuit is connected with the communication data port DA 'and the auxiliary circuit, receives a second sub-control signal from the communication data port DA' after the negative electrode of the battery cell is communicated with the negative output end P-, and is switched on under the control of the second sub-control signal, and sends a corresponding control signal to the auxiliary circuit to continuously control the auxiliary circuit to be switched on after the second control circuit is switched on, so that the positive output end P + is communicated with the second switch M2 through the auxiliary circuit.
In particular, the auxiliary circuit may comprise a sixth switch M6; the first control circuit may specifically comprise a seventh switch M7; the second control circuit may specifically comprise an eighth switch M8.
Specifically, the sixth switch M6 includes a first path end, a second path end, and a control end, the first path end of the sixth switch M6 is connected to the control end of the second switch M2, and the second path end of the sixth switch M6 is connected to the positive output end P +, so as to output a second control signal to the second switch M2 when the sixth switch M6 is turned on; the seventh switch M7 comprises a first path end, a second path end and a control end, the first path end of the seventh switch M7 is grounded, the second path end of the seventh switch M7 is connected with the control end of the sixth switch M6, and the control end of the seventh switch M7 is connected with the negative output end P-to receive the first sub-control signal from the negative output end P-and control the sixth switch M6 to be turned on; the eighth switch M8 includes a first pass terminal, a second pass terminal and a control terminal, the first pass terminal of the eighth switch M8 is grounded, the second pass terminal of the eighth switch M8 is connected to the control terminal of the sixth switch M6, and the control terminal of the eighth switch M8 is connected to the communication data port DA to receive the second sub-control signal from the communication data port DA, so as to continuously control the sixth switch M6 to be turned on.
Referring to fig. 7, fig. 7 is a schematic structural diagram of a control circuit according to a sixth embodiment of the present application. In an embodiment, the control circuit further comprises a delay unit 14.
Referring to fig. 8, fig. 8 is a schematic structural diagram of a control circuit according to another embodiment of the present disclosure; the delay unit 14 is respectively connected with the power-on control unit 11 and the battery protection unit 12; specifically, the delay unit 14 includes a storage capacitor CT and an integration delay unit 141.
Specifically, one end of the storage capacitor CT is connected to the power-on control unit 11, and the other end is grounded to the voltage GND; when the positive output end P + and the negative output end P-are connected to the load, the storage capacitor CT is configured to store charges, so as to maintain the driving of the integration delay unit 141 during a period from when the first switch M1 turns on the negative electrode of the battery cell and the negative output end P-to when the load and the battery start to send out data communication, and simultaneously maintain the driving of the integration delay unit 141 during a period when the communication data port DA pulse signal is at a low level, that is, to drive the ninth switch M9 to be continuously turned on.
Specifically, the charging resistance of the storage capacitor CT should be as small as possible, so as to increase the charging speed of the storage capacitor CT, and the discharging resistance should be as large as possible, so as to facilitate ensuring that the holding voltage of the storage capacitor CT has a sufficiently long-time drive to the integration delay unit 141, so as to avoid the problem of discharge interruption occurring in the normal power supply time of the battery cell.
Specifically, one end of the integration delay unit 141 is connected to the storage capacitor CT, and the other end is connected to the battery protection unit 12 through the second switch M2.
In an embodiment, the integration delay unit 141 can delay the conduction of the second switch M2, so that the battery protection unit 12 is conducted with the positive output terminal P + when the charging voltage of the storage capacitor CT approaches the voltage of the positive output terminal P +, thereby avoiding the problem of frequent circuit interruption.
Specifically, referring to fig. 8, the integration delay unit 141 includes a resistor RD, a capacitor CD, and a ninth switch M9; one end of the resistor RD is connected to the storage capacitor CT, the other end of the resistor RD is connected to the control end of the ninth switch M9, one end of the capacitor CD is connected to the resistor RD, the other end of the capacitor CD is grounded, the first path end of the ninth switch M9 is connected to the battery protection unit 12 through the second switch M2, and the second path end of the ninth switch M9 is grounded. The resistor RD and the capacitor CD are used to delay the conduction of the ninth switch M9, so that the charging voltage on the storage capacitor CT approaches the voltage of the positive output terminal P +, and then the ninth switch M9 is turned on, thereby avoiding the problem of frequent circuit interruption.
In an embodiment, the storage capacitor CT is configured to maintain driving of the ninth switch M9 after the first switch M1 turns on the negative electrode of the battery cell and the negative output terminal P-after the positive output terminal P + and the negative output terminal P-are connected to the load, until the load and the battery start to send out data communication, so that the power-on control unit 11 is connected to the control terminal of the second switch M2 through the ninth switch M9; therefore, the second switch M2 can receive the second control signal from the power-on control unit 11, and the battery protection unit 12 is connected to the positive electrode of the battery cell under the driving of the second control signal, so that the negative electrode of the battery cell is connected to the negative output end P-, and the battery cell supplies power to the load; meanwhile, the driving of the ninth switch M9 during the low level of the communication data port DA pulse signal is maintained.
Specifically, the sixth switch M6, the seventh switch M7, the eighth switch M8, and the ninth switch M9 may be MOS transistors, or relays.
Specifically, the seventh switch M7, the eighth switch M8, and the ninth switch M9 may be N-type transistors, and the sixth switch M6 may be P-type transistors.
In the control circuit provided by this embodiment, by further providing the delay unit 14 and connecting the delay unit 14 to the power-on control unit 11 and the battery protection unit 12, the battery cell can supply power to the load, and the problem of self-power consumption of the control circuit when the battery cell is idle is effectively avoided; the volume of the battery with the control circuit cannot be increased, and the production cost can be saved; meanwhile, by arranging the storage capacitor CT, the problem of frequent charging interruption can be avoided in the process of charging the load by the battery cell, and meanwhile, the charging time of the battery cell to the load can be prolonged.
The control signal may be a level signal.
The operation of the control circuit will be explained in detail below.
Specifically, when the battery cell is in an idle state, the negative output end P-and the communication data port DA are both free of voltage, the sixth switch M6, the seventh switch M7, the eighth switch M8 and the ninth switch M9 are disconnected due to no voltage driving, at this time, the battery protection unit 12 is not powered, the positive output end P + and the negative output end P-of the battery cell are not discharged, and the whole circuit is in a power saving state, so that the problem of self power consumption of the control circuit when the battery cell is idle can be effectively avoided.
When the battery is connected with the load, that is, the positive output end P + and the negative output end P-of the battery are respectively connected with the corresponding ends of the load, the high voltage of the battery is output from the positive electrode of the battery core through the positive output end P +, the high voltage is added to the negative output end P-of the battery through the load leakage current, the seventh switch M7 receives the first sub-control signal from the negative output end P-and is switched on under the driving of the first sub-control signal, so as to drive the sixth switch M6 to be switched on, then the storage capacitor CT is charged, the voltage on the storage capacitor CT drives the ninth switch M9 to be switched on after the integral delay of the resistor RD and the capacitor CD, the second switch M2 receives the second control signal from the power-on control unit 11 to be switched on, so that the battery protection unit 12 is connected with the positive electrode of the battery core, and the battery protection unit 12 can supply power; after the power supply of the battery protection unit 12, the third control signal is output to the first switch M1, the first switch M1 receives the third control signal and is driven by the third control signal to be turned on, so as to connect the negative electrode of the battery cell with the negative output end P-, and the battery cell starts to supply power to the load. When the first switch M1 is turned on, that is, after the negative electrode of the battery cell is connected to the negative output terminal P "by the first switch M1, the negative output terminal P" is grounded at the voltage GND, the seventh switch M7 is turned off due to the loss of the first sub-control signal, and during the turn-off period of the seventh switch M7, the ninth switch M9 and the second switch M2 are continuously driven to be turned on by the voltage retained on the storage capacitor CT, so that the battery protection unit 12 can continue to operate, and the battery cell is driven to supply power to the load; after the load is powered on and started, the load and the battery carry out data communication through the communication data port DA, at the moment, the communication data port DA can be used for receiving a second sub-control signal, and the eighth switch M8 is driven to be conducted under the driving of the second sub-control signal, so that the sixth switch M6 is continuously driven to be conducted, and the second switch M2 is controlled to be continuously conducted, so that the battery cell continuously supplies power to the load; therefore, the battery core can supply power for the load, the size of the battery with the control circuit cannot be increased, and the production cost can be saved.
Referring to fig. 9, fig. 9 is a waveform diagram of each time phase of a control circuit according to an embodiment of the present application; specifically, the control circuit includes a first time period t1, a second time period t2, a third time period t3, a fourth time period t4 and a fifth time period t5 when operating; the first time period t1 is the time required for the storage capacitor CT to be fully charged after the negative output terminal P-is powered on, that is, the time required for the voltage of the storage capacitor CT to reach the same voltage as the voltage of the positive output terminal P + after the negative output terminal P-is powered on; the second time period t2 is the time required for the ninth switch M9 to turn on after the negative output terminal P-is powered on; the third time period t3 is the time required for the first switch M1 to be turned on until the load and the battery start to communicate data; the fourth time period t4 is the longest low level time of the communication data port DA; the fifth time period t5 is the time required for the battery to disengage from the load (i.e. the positive output terminal P + and the negative output terminal P-disengage from the load) until the ninth switch M9 is opened.
Specifically, in a first time period t1, a positive output end P + and a negative output end P-are respectively connected with corresponding ends of a load, a high voltage of the battery is output from a positive electrode of the battery cell through the positive output end P +, and is added to a negative output end P-of the battery through a load leakage current, at this time, the negative output end P-is at a high level, the seventh switch M7 and the sixth switch M6 are driven to be turned on, and the storage capacitor CT starts to be charged until the voltage at two ends of the storage capacitor CT is the same as the voltage at the positive output end P +; meanwhile, the storage capacitor CT slowly discharges to the capacitor CD; at this stage, the first switch M1 and the second switch M2 are turned off, and no data communication is performed between the communication data port DA of the battery and the load.
During the second time period t2, the storage capacitor CT continues to discharge to the capacitor CD while charging until the voltage across the capacitor CD can drive the ninth switch M9 to conduct, i.e., the control terminal of the second switch M2 can be connected to the power-on control unit 11 through the ninth switch M9. Specifically, in this time period, the two ends of the negative output terminal P-and the storage capacitor CT are both at high level, the second switch M2 and the first switch M1 are still in the off state, and no data communication is performed between the communication data port DA of the battery and the load.
At a third time period t3, the storage capacitor CT is at a high level, and the capacitor CD is continuously charged until the voltage of the ninth switch M9, which is the same as the voltage of the storage capacitor CT, is reached, and the ninth switch M9 is driven to be turned on by a high level signal, so that the second switch M2 and the first switch M1 are driven to be turned on, and the load starts to perform initialization processing; at this time, the negative output terminal P-is grounded voltage GND, and the seventh switch M7 is turned off because the control signal cannot be received from the negative output terminal P; no data communication is performed between the communication data port DA of the battery and the load.
During the fourth time period t4, the negative output terminal P-is at a low level, the communication data port DA is at a low level, and the storage capacitor CT and the capacitor CD are at a high level, during which the storage capacitor CT is continuously discharged to drive the ninth switch M9, the second switch M2 and the first switch M1 to be turned on.
At the fifth time period t5, the load is disconnected from the positive output terminal P + and the negative output terminal P-of the battery, the negative output terminal P-is at low level, the storage capacitor CT starts to discharge to drive the second switch M2 and the first switch M1 to be continuously conducted until the voltage across the storage capacitor CT is lower than the driving voltage required for the ninth switch M9 to be conducted.
The control circuit provided by the embodiment disconnects the negative electrode of the battery cell from the negative output end P-when the battery cell is idle, so as to prevent the self-power consumption problem of the control circuit; when the battery is connected to the load, the seventh switch M7 in the power-on control unit 11 is driven to be turned on by receiving the first sub control signal from the negative output terminal P-and simultaneously drives the sixth switch M6 to be turned on to charge the storage capacitor CT; the storage capacitor CT discharges to the integral delay unit 141, and drives the ninth switch M9 to be turned on, and further drives the second switch M2 to be turned on, so that the problem of frequent circuit interruption can be avoided, and the power supply time of the battery for the load can be prolonged; after the battery protection unit 12 is powered on, a third control signal is sent to the first switch M1, and the first switch M1 is driven by the third control signal to conduct the negative electrode of the battery cell with the negative output end P-, so that the battery cell supplies power to the load; after the load is powered on and started, the power-on control unit 11 may receive the second sub-control signal through the communication data port DA, and continuously drive the ninth switch M9, the second switch M2, and the first switch M1 to be turned on under the driving of the second sub-control signal, so that the battery cell continuously supplies power to the load. Therefore, the power supply of the battery cell for the load can be realized on the basis of avoiding adding a new control port, and the self-power consumption problem of the control circuit when the battery cell is idle can be avoided; meanwhile, the size of the battery with the control circuit cannot be increased, and the production cost can be saved.
Referring to fig. 10, fig. 10 is a schematic structural diagram of a battery according to an embodiment of the present disclosure; in this embodiment, a battery 1 is provided, the battery 1 has a control circuit 10, and the control circuit 10 may be the control circuit according to the above embodiments, and the specific structure, connection relationship and operation principle of the control circuit may be described in any of the above embodiments with reference to the related text of the control circuit, which is not described herein again.
In one embodiment, such as an explosion-proof battery, the explosion-proof battery has the control circuit according to the above embodiment; assuming that the capacity of the explosion-proof battery is 2400mAh, and charging the battery for 30 percent when the battery leaves a factory, namely 720 mAh; under normal operating conditions, the total current consumed by the explosion-proof battery is about 196.5 uA. When the first switch M1 is turned off, the total current consumption of the explosion-proof battery is about 3.5uA after the explosion-proof battery enters the power saving state. Therefore, the control circuit 10 can greatly reduce the self-consumption electric quantity of the battery 1 and prolong the service life of the battery 1.
The battery 1 provided by the embodiment is provided with the control circuit provided by the embodiment, so that power can be supplied to a load when the load is connected, and the problem of self power consumption of the control circuit 10 when the battery 1 is idle can be effectively avoided; meanwhile, the volume of the battery 1 is not increased, and the production cost can be saved.
The above embodiments are merely examples and are not intended to limit the scope of the present disclosure, and all equivalent structures or flow transformations that may be embodied in the present disclosure and drawings, or be directly or indirectly applied to other related arts, are also within the scope of the present disclosure.
Claims (10)
1. A control circuit is applied to a battery, wherein the battery comprises a battery core, a positive output end and a negative output end, and the positive output end and the negative output end are respectively connected with a power supply end of a load to supply power to the load; the positive input end is connected with the positive pole of the battery cell, wherein the control circuit comprises:
a first switch connected between the negative electrode of the cell and the negative output terminal, wherein when the battery is not connected to the load, the first switch controls a path between the negative electrode of the cell and the negative output terminal to be disconnected, and a voltage on the negative electrode of the cell is used as a ground voltage;
a second switch;
a power-on control unit connected to the second switch, wherein the power-on control unit operates to turn on the second switch when the battery is connected to the load;
the ground voltage is connected to the ground terminal of the battery protection unit, the power supply terminal of the battery protection unit is connected to the positive electrode of the battery cell through the second switch, and the first control terminal of the battery protection unit is connected to the first switch; when the second switch is turned on, a path between a power supply end of the battery protection unit and the positive electrode of the battery core is turned on, so that the battery protection unit works, and the first control end of the battery protection unit sends a first control signal to turn on the first switch, so that the path between the negative electrode of the battery core and the negative output end is turned on.
2. The control circuit of claim 1, wherein the power-up control unit comprises:
a first power-on control module connected to the negative output terminal and the second switch, wherein the first power-on control module receives a voltage at the negative output terminal to connect a positive electrode of the battery cell through the load when the battery is connected to the load, thereby operating to turn on the second switch; after the first switch is conducted, the first power-on control module stops working;
and the second power-on control module is connected with the second switch, and when the second switch is switched on, the second power-on control module works so as to control the second switch to be continuously switched on after the first power-on control module stops working.
3. The control circuit of claim 2, wherein the first power-up control module comprises:
a third switch, wherein a control terminal of the third switch is connected to the negative output terminal, a first path terminal of the third switch is connected to a control terminal of the second switch, and a second path terminal of the third switch is connected to the ground voltage.
4. The control circuit of claim 3, wherein the second power-up control module comprises:
a fourth switch, wherein a control terminal of the fourth switch is connected to a first node between the second switch and the power terminal of the battery protection unit, a first path terminal of the fourth switch is connected to the control terminal of the second switch, and a second path terminal of the fourth switch is connected to the ground voltage;
when the second switch is turned on, the control terminal of the fourth switch receives the voltage on the positive electrode of the battery cell through the turned-on second switch, so that the fourth switch is turned on, and the second power-on control module works to enable the second switch to be turned on continuously.
5. The control circuit of claim 4, wherein the second power-on control module further comprises a resistor through which a control terminal of the fourth switch is connected to the first node between the second switch and the power terminal of the battery protection unit.
6. The control circuit of claim 4, wherein the battery protection unit further comprises a data port and a second control port, wherein the data port is configured to connect to a data port of the load for data communication when the battery is connected to the load;
when the real-time duration of the data communication between the data port and the load is interrupted exceeds a preset duration, or when the data received by the data port indicates that the real-time duration that the working current of the battery core is lower than a preset current value exceeds the preset duration, the battery protection unit sends a second control signal at the second control port so as to enable the second power-on control module to stop working.
7. The control circuit of claim 6, wherein the power-up control unit further comprises:
and the power-off control module is connected with the second control end of the battery protection unit and the second power-on control module, and works when the second control end sends the second control signal, so that the second power-on control module stops working.
8. The control circuit of claim 7, wherein the power down control module comprises:
a fifth switch, wherein a control terminal of the fifth switch is connected to the second control terminal of the battery protection unit, a first path terminal of the fifth switch is connected to the second power-on control module, and a second path terminal of the fifth switch is connected to the ground voltage.
9. The control circuit of claim 8, wherein the first switch, the third switch, the fourth switch, and the fifth switch are each N-type MOS transistors, and the second switch is a P-type MOS transistor.
10. A battery comprising a control circuit according to any one of claims 1 to 9.
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| CN202011002930.2A CN114256954A (en) | 2020-09-22 | 2020-09-22 | Control circuit and battery |
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| CN202011002930.2A CN114256954A (en) | 2020-09-22 | 2020-09-22 | Control circuit and battery |
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