CN114256954B - Control circuit and battery - Google Patents

Control circuit and battery Download PDF

Info

Publication number
CN114256954B
CN114256954B CN202011002930.2A CN202011002930A CN114256954B CN 114256954 B CN114256954 B CN 114256954B CN 202011002930 A CN202011002930 A CN 202011002930A CN 114256954 B CN114256954 B CN 114256954B
Authority
CN
China
Prior art keywords
switch
battery
control
power
load
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
CN202011002930.2A
Other languages
Chinese (zh)
Other versions
CN114256954A (en
Inventor
潘启辉
肖想民
谢绍伟
阳林华
韩巧瑜
杨宝锋
刘洋
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Hytera Communications Corp Ltd
Original Assignee
Hytera Communications Corp Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Hytera Communications Corp Ltd filed Critical Hytera Communications Corp Ltd
Priority to CN202011002930.2A priority Critical patent/CN114256954B/en
Publication of CN114256954A publication Critical patent/CN114256954A/en
Application granted granted Critical
Publication of CN114256954B publication Critical patent/CN114256954B/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • 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
    • 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
    • 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
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/10—Energy storage using batteries

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Business, Economics & Management (AREA)
  • Emergency Management (AREA)
  • Secondary Cells (AREA)
  • Charge And Discharge Circuits For Batteries Or The Like (AREA)

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; the power end of the battery protection unit is connected to the positive electrode of the battery core through the second switch, and the first control end of the battery protection unit is connected to the first switch; when the battery is not connected with a load, the first switch is opened; when the battery is connected with a load, the power-on control unit works to conduct the second switch, and then a passage between the power end of the battery protection unit and the positive electrode of the battery core is conducted, so that the battery protection unit works and conducts the first switch, and a passage between the negative electrode of the battery core and the negative output end is conducted. The control circuit can effectively avoid the problem of battery self-power consumption, and can not increase the volume of the battery and save the cost.

Description

Control circuit and battery
Technical Field
The present invention relates to the field of battery technologies, and 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 consumes electric energy when working, so that the problem of self-consumption 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, the control circuit is electrified when the battery is charged or the corresponding load is required to be electrified, and at present, the corresponding control ports are generally designed at the discharging end and the charging end of the battery to control the electrification and the de-electrification of the control circuit.
However, due to the fact that the corresponding control port is additionally arranged, production cost is increased, the size of the battery is increased, and miniaturized production of products is not facilitated.
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 battery self-consumption 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 technical problems, the first technical scheme adopted by the application is as follows: the control circuit is applied to a battery, and the battery comprises a battery core, a positive output end and a negative output end which are used for being respectively connected with a power supply end of a load so as to supply power to the load; the positive input end is connected with the positive electrode of the battery core, wherein 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, wherein when the battery is not connected with a load, the first switch controls a passage 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 the 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 end, a grounding end and a first control end, wherein the grounding end of the battery protection unit is connected with ground voltage, the power end of the battery protection unit is connected to the positive electrode of the battery core 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 conducted, a passage between the power end of the battery protection unit and the positive electrode of the battery core is conducted so that the battery protection unit works, and the first control end of the battery protection unit sends out a first control signal to conduct the first switch, and a passage between the negative electrode of the battery core and the negative output end is conducted.
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, and receives the voltage on the negative output end, so that when the battery is connected with a load, the positive electrode of the battery core is connected with the load, and the second switch is turned on; after the first switch is turned on, the first power-on control module stops working; the second power-on control module is connected with the second switch, wherein when the second switch is turned 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 turned on.
The first power-on control module comprises a third switch; wherein the control terminal of the third switch is connected to the negative output terminal, the first path terminal of the third switch is connected to the control terminal of the second switch, and the second path terminal of the third switch is connected to the ground voltage.
The second power-on control module comprises a fourth switch, wherein the control end of the fourth switch is connected to a first node between the second switch and the power end of the battery protection unit, the first path end of the fourth switch is connected to the control end of the second switch, and the second path end of the fourth switch is connected to the ground voltage; when the second switch is turned on, the control end of the fourth switch receives the voltage on the positive electrode of the battery core 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.
The second power-on control module further comprises a resistor, and the control end of the fourth switch is connected to a first node between the second switch and the power end 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 for data communication when the battery is connected with the load; when the real-time duration of the data port interrupting the data communication with the load exceeds the preset duration, or when the real-time duration of the data port receiving the data indicating that the working current of the battery core is lower than the preset current value exceeds the preset duration, the battery protection unit sends out a second control signal at the second control port so as to stop the second power-on control module.
Wherein, the power-on control unit further comprises a power-off control module; 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 out a second control signal, so that the second power-on control module stops working.
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 passage end of the fifth switch is connected with the second power-on control module, and the second passage 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 technical problems, a second technical scheme adopted by the application is as follows: there is provided a battery comprising the control circuit referred to 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 core 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 passage between the negative electrode of the battery core and the negative output end, so that the problem of battery self-consumption when the battery is idle is effectively avoided; in addition, by arranging the power-on control unit and enabling the power-on control unit to be connected with the second switch, when the battery is connected with a load, the power-on control unit works to conduct the second switch; in addition, by arranging the battery protection unit, connecting the grounding end of the battery protection unit with the ground voltage, connecting the power end of the battery protection unit to the positive electrode of the battery core through the second switch, and connecting the first control end of the battery protection unit to the first switch, when the second switch is conducted, conducting the passage between the power end of the battery protection unit and the positive electrode of the battery core, so that the battery protection unit works, and simultaneously, enabling the first control end of the battery protection unit to send out a first control signal to conduct the first switch, and then conducting the passage between the negative electrode of the battery core and the negative output end, so as to supply power for a load; compared with the prior art, the scheme that the corresponding control port is additionally arranged is not needed, the volume of the battery can not be increased, and the production cost can be saved.
Drawings
Fig. 1 is a schematic structural diagram of a control circuit and a battery cell according to a first embodiment of the present application;
fig. 2 is a schematic structural diagram of a control circuit and a battery cell according to a second embodiment of the present application;
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 application;
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 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 diagram of a control circuit according to another embodiment of the present application;
FIG. 9 is a waveform diagram of each time phase 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 following description of the embodiments of the present application will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are only some, but not all embodiments of the application. All other embodiments, which can be made by those skilled in the art based on the embodiments of the application without making any inventive effort, are intended to be within the scope of the application.
The terms "first," "second," "third," and the like in this disclosure are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first", "a second", and "a third" may explicitly or implicitly include at least one such feature. In the description of the present application, the meaning of "plurality" means at least two, for example, two, three, etc., unless specifically defined otherwise. All directional indications (such as up, down, left, right, front, back … …) in the embodiments of the present application are merely used to explain the relative positional relationship, movement, etc. between the components in a particular gesture (as shown in the drawings), and if the particular gesture changes, the directional indication changes accordingly. Furthermore, the terms "comprise" and "have," as well as any variations thereof, are intended to cover a non-exclusive inclusion. For example, a process, method, system, article, or apparatus that comprises a list of steps or elements is not limited to only those listed steps or elements but may 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 may be included in at least one embodiment of the application. The appearances of such phrases 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. Those of skill in the art will explicitly and implicitly appreciate that the embodiments described herein may 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 application; in this embodiment, a control circuit is provided, which is applied to a battery; the battery specifically comprises a battery core, a positive output end P+ and a negative output end P-, wherein the positive output end P+ and the negative output end P-are 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 with the positive electrode of the battery core.
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 source 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 passage between the negative electrode of the battery cell and the negative output end P-to be disconnected; in a specific embodiment, when the battery is not connected to the load, the first switch M1 may be in an off 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, in an open state when the first switch is in the first position, and in a closed state when the first switch is in the second position, which is not limited in this embodiment, so long as the path between the negative electrode of the battery core and the negative output terminal P-can be controlled to be disconnected; it can be understood that after the first switch M1 controls the negative electrode of the battery cell to be disconnected from the negative output end P-, the battery cell stops supplying power to the control circuit, so as to avoid the problem of self-consumption 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 taken as the ground voltage GND.
The power-on control unit 11 is connected to the second switch M2, and when the battery is connected to the load, that is, when 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 an 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 according to 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 terminal P-, so as to connect to the positive electrode of the battery cell by receiving the voltage control signal from the load and starting to operate to turn on the second switch M2 when the battery is connected to the load; 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 a load, the first power-on control module 111 receives voltage from the negative output terminal P-of the battery and operates to control the second switch M2 to conduct.
In a specific embodiment, the first power-on control module 111 includes a third switch M3; specifically, the third switch M3 includes a control terminal, a first path terminal, and a second path terminal; wherein the control terminal of the third switch M3 is connected to the negative output terminal P-, of the battery, the first path terminal of the third switch M3 is connected to the control terminal of the second switch M2, and the second path terminal of the third switch M3 is connected to the ground voltage GND.
The second power-on control module 112 is connected with the second switch M2; in a specific implementation process, after the second switch M2 is turned on, the second power-on control module 112 starts to work, so that after the first power-on control module 111 stops working, the second switch M2 is controlled to be continuously turned on by the second power-on control module 112, and then 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, where the fourth switch M4 includes a control terminal, a first path terminal and a second path terminal; the control terminal of the fourth switch M4 is connected to a first node between the second switch M2 and the power supply terminal VCC of the battery protection unit 12, the first path terminal of the fourth switch M4 is connected to the control terminal of the second switch M2, and the second path terminal of the fourth switch M4 is connected to the ground voltage GND. Specifically, after the second switch M2 is turned on, the control end of the fourth switch M4 receives the voltage on 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 works 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 according to 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 terminal VCC of the battery protection unit 12 through a resistor.
The battery protection unit 12 may specifically be a unit circuit with one or more functions of over-voltage or under-voltage protection, over-current protection, electric quantity detection or battery management of the battery; 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 works; and when the battery protection unit 12 is powered on, the first control terminal DO of the battery protection unit 12 sends out a first control signal to control the first switch M1 to be turned on, 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.
In a specific embodiment, referring to fig. 4, fig. 4 is a schematic structural diagram of a control circuit and a battery cell according to a fourth embodiment of the present application; the battery protection unit 12 further includes a data port DA and a second control port OFF, wherein the data port DA is configured to be connected to a data port of a load for data communication therebetween when the battery is connected to the load.
In a specific embodiment, when the real-time duration of the data port DA of the battery protection unit 12 for interrupting the data communication with the load exceeds the preset duration, that is, when the real-time duration of the data port DA of the battery protection unit 12 for interrupting the communication with the data port of the load exceeds the preset duration, or when the real-time duration of the data port DA received data indicating that the working current of the battery core is 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, so that the second switch M2 is turned OFF, and then the first switch M1 is turned OFF, so that the battery stops supplying power to the load, further electric resources are saved, the power consumption of the battery protection unit 12 is reduced, and the battery enters a power-saving state; meanwhile, compared with the scheme that a corresponding control port is additionally arranged in the prior art, the scheme of the application can not only enable the battery to supply power for the load, but also effectively avoid the problem of battery power consumption when the battery is idle, and meanwhile, the volume of the battery is not increased, and the cost can be saved.
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 specifically controls the second power-on control module 112 to stop working through the power-off control module 113; specifically, the power-down control module 113 is connected to the second control port OFF of the battery protection unit 12 and the second power-up control module 112, and when the second control port OFF sends out the second control signal, the power-down control module 113 contacts the second control signal and starts to operate, so that the second power-up control module 112 stops operating.
Specifically, in a specific embodiment, the power-down control module 113 includes a fifth switch M5, where the fifth switch M5 includes a control terminal, a first path terminal, and a second path terminal; the control terminal of the fifth switch M5 is connected to the second control port OFF of the battery protection unit 12, the first path terminal of the fifth switch M5 is connected to the second power-on control module 112, and the 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 be transistors or relays.
According to the control circuit provided by the embodiment, the first switch M1 and the second switch M2 are arranged, the first switch M1 is connected between the negative electrode of the battery cell and the negative output end P-, and meanwhile, when the battery is not connected with a load, the first switch M1 is disconnected to disconnect a passage between the negative electrode of the battery cell and the negative output end P-, so that the problem of battery self-consumption when the battery is idle is effectively avoided; in addition, by providing the power-on control unit 11 and making the power-on control unit 11 connect 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 supply terminal VCC of the battery protection unit 12 is connected to the positive electrode of the battery 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 supply terminal VCC of the battery protection unit 12 and the positive electrode of the battery is conducted, so that the battery protection unit 12 works, and at the same time, the first control terminal DO of the battery protection unit 12 sends out a first control signal to conduct the first switch M1, so as to conduct the path between the negative electrode of the battery and the negative output terminal P-, so as to supply power to the load; compared with the prior art, the scheme that the corresponding control port is additionally arranged is not needed, the volume of the battery can not be increased, and the production cost can be saved.
In this embodiment, a battery is provided that includes a cell, a positive output, a negative output, and a control circuit.
The control circuit is a control circuit according to any one of the above embodiments, and the connection relationship and other structures and functions between the control circuit and the battery cell, the positive output end and the negative output end are the same as or similar to those between the control circuit provided by the above embodiment and the battery cell, the connection relationship and other structures and functions between the control circuit and the positive output end p+ and the negative output end P-, and the same or similar technical effects can be achieved, and the detailed description can be seen in the above related text and will not be repeated here.
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 passage between the negative electrode of the battery core and the negative output end, so that the problem of battery power consumption 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 when the battery is idle or the real-time length of interrupting data communication with the load reaches the preset time length or when the working current of the battery core is lower than the real-time length of a preset current value and exceeds the preset time length, the control circuit and the battery core can be disconnected in time, so that the battery enters a power-saving state, electric resources are saved, and the problem of self-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 according to a fifth embodiment of the present application; in this embodiment, a control circuit is provided; unlike the above embodiment, the control circuit further includes a communication data port DA 'connected to the data port DA on the battery protection unit 12 to communicate data 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 end P-and the communication data port DA ', and is configured to sequentially receive a first control signal from the negative output end P-or the communication data port DA' when the positive output end p+ and the negative output end P-are connected to a load, and to communicate the positive output end p+ with the second switch M2 under the driving of the first control signal, so that the second switch M2 can receive a second control signal from the positive output end p+ and conduct under the driving of the second control signal, so as to connect the battery protection unit 12 with the positive output end p+ through the second switch M2.
Specifically, when the positive output end p+ and the negative output end p+ are connected with the corresponding ends of the load and the negative electrode of the battery cell is not communicated with the negative output end P-, the power-on control unit 11 receives the first control signal from the negative output end P-and is communicated with the positive output end p+ under the driving of the first control signal, so that the negative electrode of the battery cell is communicated with 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 continuously maintains communication with the positive output terminal p+ under the driving of the first control signal, so as to continuously communicate the negative electrode of the driving battery with the negative output terminal P-, so that the battery 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 connected with the negative output end P-through a first switch M1; and when the positive output end P+ and the negative output end P-are connected with a load, the second switch M2 receives a second control signal from the power-on control unit 11 and enables the battery protection circuit 12 to be communicated with the positive electrode of the battery core under the drive of the second control signal, after the battery protection circuit 12 is communicated 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 enables the negative electrode of the battery core to be connected with the negative output end P-under the drive of the third control signal so as to enable the battery core to supply power for the load.
According to the control circuit provided by the embodiment, the power-on control unit 11 is connected with the negative output end P-and the communication data port DA ', so that after the power-on control unit 11 is connected with a load at the positive output end P+ and the negative output end P-, the power-on control unit can sequentially receive a first control signal from the negative output end P-and the communication data port DA', and the positive output end P+ is connected with the second switch M2 under the driving of the first control signal, and the second switch M2 can receive a second control signal from the positive output end P+ and is conducted; in addition, by arranging the battery protection unit 12, 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, so that the battery protection unit 12 is communicated with the positive electrode of the battery cell after the second switch M2 receives a 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 a third control signal from the battery protection unit 12, so that the battery cell supplies power for a 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 the first control signal from the communication data port DA', so that the negative electrode of the battery cell is continuously controlled to be communicated with the negative output end P-through the first control signal, and the battery cell can continuously supply power to the load; compared with the prior art, the control circuit needs to be additionally provided with a scheme of corresponding control ports, so that the battery core can supply power for the load, the problem of self-consumption of the control circuit when the battery core is idle can be effectively avoided, meanwhile, the volume 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 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 being 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 after the first control circuit is conducted so as to control the auxiliary circuit to conduct; 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' and is conducted under the control of the second sub-control signal after the negative electrode of the battery cell is communicated with the negative output end P-, and sends a corresponding control signal to the auxiliary circuit to continuously control the auxiliary circuit to be conducted after the second control circuit is conducted, 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 include a seventh switch M7; the second control circuit may specifically include an eighth switch M8.
Specifically, the sixth switch M6 includes a first path end, a second path end and a control end, where 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 passage end, a second passage end and a control end, the first passage end of the seventh switch M7 is grounded, the second passage 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 conducted; the eighth switch M8 includes a first path terminal, a second path terminal, and a control terminal, the first path terminal of the eighth switch M8 is grounded, the second path 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 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 application; 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 at the ground voltage GND; when the positive output terminal p+ and the negative output terminal P-are connected to the load, the storage capacitor CT is used to store electric charges, so as to maintain the driving of the integration delay unit 141 after the first switch M1 turns on the negative electrode of the battery cell and the negative output terminal P-until the load and the battery start sending data communication, and simultaneously maintain the driving of the integration delay unit 141 during the low level of the DA pulse signal of the communication data port, that is, drive the ninth switch M9 to continuously turn 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 drives the integration delay unit 141 for a long time, so as to avoid the problem of discharging interruption 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 a specific 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 is close to the voltage of the positive output terminal p+ to avoid the 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 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 at GND. The resistor RD and the capacitor CD are used for delaying the conduction of the ninth switch M9, so that the charging voltage on the storage capacitor CT is close to the voltage of the positive output terminal p+ and then the ninth switch M9 is turned on, so as to avoid the problem of frequent circuit interruption.
In a specific embodiment, the storage capacitor CT is used to maintain the 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; so that the second switch M2 can receive the second control signal from the power-on control unit 11, and communicate the battery protection unit 12 with the positive electrode of the battery core under the drive of the second control signal, and further connect the negative electrode of the battery core with the negative output end P-, so that the battery core supplies power for the load; at the same time, 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, eighth and ninth switches M7, M8 and M9 may be N-type transistors, and the sixth switch M6 may be a P-type transistor.
According to the control circuit provided by the embodiment, the delay unit 14 is further arranged, and the delay unit 14 is respectively connected with the power-on control unit 11 and the battery protection unit 12, so that a battery cell can supply power for a load, and the problem of self-consumption of the control circuit when the battery cell is idle is effectively avoided; the volume of the battery with the control circuit is not 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 that the battery cell charges the load, 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 principle of the control circuit will be described in detail.
Specifically, when the battery cell is in an idle state, the negative output end P-and the communication data port DA are not provided with voltages, 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 output, and the whole circuit is in a power-saving state, so that the problem of self-consumption of the control circuit when the battery cell is idle can be effectively avoided.
When the battery is connected with a load, namely, a positive output end P+ and a negative output end P-of the battery are respectively connected with corresponding ends of the load, the high voltage of the battery is output by 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 load leakage current, a seventh switch M7 receives a first sub-control signal from the negative output end P-and is conducted under the drive of the first sub-control signal, a sixth switch M6 is further driven to be conducted, then a storage capacitor CT is charged, the voltage on the storage capacitor CT is integrated and delayed through a resistor RD and a capacitor CD and then is conducted to drive a ninth switch M9, a second switch M2 receives a second control signal from an upper electric control unit 11 and is conducted to further enable a battery protection unit 12 to be communicated with the positive electrode of the battery core, and the battery protection unit 12 is powered; after the battery protection unit 12 supplies power, a third control signal is output to the first switch M1, the first switch M1 receives the third control signal and is turned on under the driving of the third control signal, so that the negative electrode of the battery cell is communicated with the negative output end P-, and the battery cell starts to supply power to the load. After 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 to the ground voltage GND, the seventh switch M7 is turned off due to the loss of the first sub-control signal, and during the off period of the seventh switch M7, the ninth switch M9 and the second switch M2 are continuously driven to be continuously turned on by the voltage maintained on the storage capacitor CT, so that the battery protection unit 12 can continuously operate to drive the battery cell to supply power to the load; when the load is electrified and started, the load and the battery are in data communication through the communication data port DA, at the moment, the communication data port DA can be utilized to receive a second sub-control signal, and the eighth switch M8 is driven to be conducted under the drive 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 volume 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 application; specifically, the control circuit comprises 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 in operation; the first time period t1 is the time required for full charge of the storage capacitor CT after the negative output terminal P-is energized, i.e., the time required for the voltage of the storage capacitor CT to reach the same voltage as the positive output terminal p+ after the negative output terminal P-is energized; the second time period t2 is the time required from the time when the negative output end P-is electrified to the time when the ninth switch M9 is turned on; the third time period t3 is the time required for data communication with the battery from the first switch M1 to the start of the load; 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., positive output terminal p+ and negative output terminal P-to disengage from the load) to turn off the ninth switch M9.
Specifically, in the first time period t1, the positive output end p+ and the negative output end P-are respectively connected with corresponding ends of the load, the high voltage of the battery is output by the positive electrode of the battery core through the positive output end p+ and is added to the negative output end P-of the battery through 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 conducted, and charging of the storage capacitor CT is started 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.
At the second time period t2, the storage capacitor CT is continuously discharged to the capacitor CD while being charged until the voltage across the capacitor CD can drive the ninth switch M9 to be turned on, that is, the control terminal of the second switch M2 can be connected to the power-on control unit 11 through the ninth switch M9. Specifically, during this time period, both the negative output terminal P-and the storage capacitor CT are 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.
In a third time period t3, the storage capacitor CT is at a high level, and the capacitor CD is continuously charged until the same voltage as the storage capacitor CT is reached, the ninth switch M9 is turned on under the drive of the high level signal, so as to drive the second switch M2 and the first switch M1 to be turned on, and the load starts to perform initialization processing; at this time, the negative output terminal P-is grounded to the voltage GND, and the seventh switch M7 is turned off because the control signal cannot be received from the negative output terminal P-again; no data communication is performed between the communication data port DA of the battery and the load.
In 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, the storage capacitor CT and the capacitor CD are at a high level, and in this stage, 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.
In the fifth time period t5, the load is separated from the positive output terminal p+ and the negative output terminal P-of the battery, the negative output terminal P-is at a low level, and the storage capacitor CT starts to discharge to drive the second switch M2 and the first switch M1 to be continuously turned on until the voltage across the storage capacitor CT is lower than the driving voltage required for turning on the ninth switch M9.
According to the control circuit provided by the embodiment, the negative electrode of the battery cell is disconnected with the negative output end P-when the battery cell is idle, so that the problem of power consumption of the control circuit is prevented; when the battery is connected with the load, the seventh switch M7 in the power-on control unit 11 receives the first sub-control signal from the negative output end P-to be conducted under the drive of the first sub-control signal, and simultaneously drives the sixth switch M6 to be conducted so as to charge the storage capacitor CT; the storage capacitor CT discharges to the integration delay unit 141 and drives the ninth switch M9 to be conducted, and then drives the second switch M2 to be conducted, 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 electrified, a third control signal is sent to the first switch M1, and the first switch M1 conducts the negative electrode of the battery core with the negative output end P-under the drive of the third control signal so as to enable the battery core to supply power for a load; after the load is powered on and started, the power-on control unit 11 can 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 core for the load can be realized on the basis of avoiding adding a new control port, and the problem of self-power consumption of the control circuit when the battery core is idle can be avoided; meanwhile, the volume of the battery with the control circuit is not 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 application; in this embodiment, a battery 1 is provided, and the battery 1 has a control circuit 10, and the control circuit 10 may be specifically a control circuit according to the above embodiment, and the specific structure, connection relationship and working principle of the control circuit may be referred to the related text description of any of the above embodiments, which is not repeated herein.
In a specific 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, charging 30% when leaving the factory, namely 720mAh; under normal operating conditions, the total current consumption of the explosion-proof battery is about 196.5uA. And when the first switch M1 is turned off, the total consumption current 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.
By arranging the control circuit provided by the embodiment, the battery 1 provided by the embodiment not only can supply power to the load when the load is connected, but also can effectively avoid the problem of power consumption of the control circuit 10 when the battery 1 is idle; at the same time, the volume of the battery 1 is not increased, and the production cost can be saved.
The foregoing is only the embodiments of the present application, and therefore, the patent scope of the application is not limited thereto, and all equivalent structures or flow path changes made by the content of the present specification and drawings, or direct or indirect application in other related technical fields, are included in the scope of the present application.

Claims (9)

1. The control circuit is characterized by being 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 used for being respectively connected with a power supply end of a load so as to supply power to the load; the positive output end is connected with the positive electrode of the battery cell, wherein the control circuit comprises:
The first switch is connected between the negative electrode of the battery cell and the negative output end, wherein when the battery is not connected with the load, the first switch controls a passage 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 the ground voltage;
A second switch;
the power-on control unit is connected with the control end of 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 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 end of the battery protection unit is connected to the positive electrode of the battery core through the second switch, and the first control end of the battery protection unit is connected to the first switch; when the second switch is conducted, a passage between the power end of the battery protection unit and the positive electrode of the battery cell is conducted so that the battery protection unit works, and the first control end of the battery protection unit sends out a first control signal to conduct the first switch, and a passage between the negative electrode of the battery cell and the negative output end is conducted;
the power-on control unit includes:
The first power-on control module is connected with the negative output end and the second switch, and is used for receiving the voltage on the negative output end so as to connect the positive electrode of the battery core through the load when the battery is connected with the load, so that the second switch is turned on; 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 after the second switch is conducted, 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 conducted.
2. The control circuit of claim 1, wherein the first power-on control module comprises:
And a third switch, wherein a control end of the third switch is connected to the negative output end, a first path end of the third switch is connected to a control end of the second switch, and a second path end of the third switch is connected to the ground voltage.
3. The control circuit of claim 2, wherein the second power-on 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 supply 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 end 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.
4. The control circuit of claim 3, 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 supply terminal of the battery protection unit.
5. The control circuit of claim 3, wherein the battery protection unit further comprises a data port and a second control port, wherein the data port is configured to connect with the data port of the load for data communication when the battery is connected with the load;
and when the real-time duration of the data port for interrupting the data communication with the load exceeds the preset duration, or when the data received by the data port indicate that the working current of the battery core is lower than the real-time duration of the preset current value and exceeds the preset duration, the battery protection unit sends out a second control signal at the second control port so as to stop the second power-on control module.
6. The control circuit of claim 5, wherein the power-on 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 out the second control signal, so that the second power-on control module stops working.
7. The control circuit of claim 6, wherein the power down control module comprises:
And the control end of the fifth switch is connected with the second control end of the battery protection unit, the first passage end of the fifth switch is connected with the second power-on control module, and the second passage end of the fifth switch is connected with the ground voltage.
8. The control circuit of claim 7, 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.
9. A battery comprising a control circuit as claimed in any one of claims 1 to 8.
CN202011002930.2A 2020-09-22 2020-09-22 Control circuit and battery Active CN114256954B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202011002930.2A CN114256954B (en) 2020-09-22 2020-09-22 Control circuit and battery

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202011002930.2A CN114256954B (en) 2020-09-22 2020-09-22 Control circuit and battery

Publications (2)

Publication Number Publication Date
CN114256954A CN114256954A (en) 2022-03-29
CN114256954B true CN114256954B (en) 2024-06-25

Family

ID=80789614

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202011002930.2A Active CN114256954B (en) 2020-09-22 2020-09-22 Control circuit and battery

Country Status (1)

Country Link
CN (1) CN114256954B (en)

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102111002A (en) * 2011-02-22 2011-06-29 无锡东海新能源科技有限公司 Device and method for realizing micro power consumption in hibernate state
CN104600676A (en) * 2015-01-29 2015-05-06 天地融科技股份有限公司 Battery protection circuit, electric energy supply device and electronic device
CN110445206A (en) * 2019-07-31 2019-11-12 维沃移动通信有限公司 Battery protection system and mobile terminal

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7598706B2 (en) * 2007-01-26 2009-10-06 General Electric Company Cell balancing battery pack and method of balancing the cells of a battery
JP5706649B2 (en) * 2010-09-08 2015-04-22 セイコーインスツル株式会社 Charge / discharge control circuit and battery device
JP5742593B2 (en) * 2011-08-30 2015-07-01 ミツミ電機株式会社 Semiconductor integrated circuit, protection circuit and battery pack
CN106253769B (en) * 2016-08-08 2018-12-04 珠海格力电器股份有限公司 Direct current fan motor control circuit and control method applying same
CN107231015B (en) * 2016-09-20 2019-07-09 华为技术有限公司 A kind of battery, terminal and charging system
CN208508553U (en) * 2018-02-14 2019-02-15 深圳市道通智能航空技术有限公司 Battery cathode control loop protective device, battery component and unmanned plane
CN109417207A (en) * 2018-03-06 2019-03-01 深圳大力神科技有限公司 A kind of discharge indicating lamp control circuit and its lithium battery source protection plate
CN108233489A (en) * 2018-03-11 2018-06-29 深圳大力神科技有限公司 A kind of charging lock-in circuit and its lithium battery source protection plate
WO2020047693A1 (en) * 2018-09-03 2020-03-12 深圳迈瑞生物医疗电子股份有限公司 Power supply management circuit
CN209119842U (en) * 2018-11-07 2019-07-16 洛阳锂乘新能源科技有限公司 A kind of four-wheel electric motor car lithium battery control circuit

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102111002A (en) * 2011-02-22 2011-06-29 无锡东海新能源科技有限公司 Device and method for realizing micro power consumption in hibernate state
CN104600676A (en) * 2015-01-29 2015-05-06 天地融科技股份有限公司 Battery protection circuit, electric energy supply device and electronic device
CN110445206A (en) * 2019-07-31 2019-11-12 维沃移动通信有限公司 Battery protection system and mobile terminal

Also Published As

Publication number Publication date
CN114256954A (en) 2022-03-29

Similar Documents

Publication Publication Date Title
CN201523320U (en) Slow start device of direct current power supply
CN103928958A (en) Lithium battery charging or discharging management circuit and lithium battery management system
CN110635676A (en) Bootstrap type pre-charging slow-starting charging circuit
CN112467868A (en) Multi-power supply switching circuit and method
CN111313374A (en) Battery system under-voltage protection circuit and method applied to electric bicycle BMS
CN114256954B (en) Control circuit and battery
WO2022061516A1 (en) Control circuit and battery
CN116937740A (en) Battery protection circuit, battery protection method, battery pack and electric tool
CN219659582U (en) Slow start circuit, power supply circuit and electronic equipment
CN204668924U (en) Switching Power Supply and control circuit thereof and open-circuit-protection arrange circuit
CN201893589U (en) Serial battery pack charge balance system
US5825099A (en) Uninterruptible power supply circuit
CN115954980A (en) Battery equalizing discharge control circuit
CN113676166B (en) Battery low-voltage automatic cut-off circuit and working method thereof
CN212162912U (en) Back-up power supply input self-starting control circuit suitable for power distribution terminal power supply
CN103107577B (en) Battery management circuit and terminal
CN210924256U (en) Battery starting circuit
CN214314590U (en) Power-saving control circuit and battery
CN1330072C (en) A telephone set power supply management circuit
CN219740018U (en) Battery protection chip, battery protection circuit and battery
WO2024007983A1 (en) Dual-battery switching apparatus and electronic device
CN117410933B (en) Overvoltage protection circuit and energy storage power supply
CN218514305U (en) Bus capacitor pre-charging circuit
CN216016467U (en) Low-voltage protection circuit, device and electrical equipment
CN217590364U (en) Power output circuit, power output device and intelligent door lock

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination
GR01 Patent grant
GR01 Patent grant