CN110445206A - Battery protection system and mobile terminal - Google Patents
Battery protection system and mobile terminal Download PDFInfo
- Publication number
- CN110445206A CN110445206A CN201910703074.4A CN201910703074A CN110445206A CN 110445206 A CN110445206 A CN 110445206A CN 201910703074 A CN201910703074 A CN 201910703074A CN 110445206 A CN110445206 A CN 110445206A
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- China
- Prior art keywords
- battery
- unit
- load
- voltage
- mould group
- 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.)
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Classifications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H7/00—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
- H02H7/18—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for batteries; for accumulators
-
- 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
- H02J7/0029—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with safety or protection devices or circuits
- H02J7/0031—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with safety or protection devices or circuits using battery or load disconnect circuits
-
- 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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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Secondary Cells (AREA)
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
Abstract
The invention discloses a kind of battery protection system and mobile terminal, the battery protection system includes that system includes: battery modules and load detecting unit, wherein the battery modules include: battery unit and battery protection unit；The first end of the load detecting unit is connect with the battery protection unit, and the second end of the load detecting unit is connect with the cell voltage end of the load mould group of the battery modules；The load detecting unit, for determining that target voltage, the target voltage are the voltage of the connecting pin of the battery protection unit and the load detecting unit according to the cell voltage of the load mould group；The battery protection unit, for determining the load connection status of the battery modules according to the target voltage, and according to the supplying power for outside state for loading connection status and controlling the battery unit.The system can be eliminated because battery unit is constantly in supplying power for outside state bring security risk, and safety is promoted.
Description
Technical field
The present invention relates to field of terminal more particularly to a kind of battery protection systems and mobile terminal.
Background technique
The mode that mobile terminal is all made of internal battery (such as lithium ion battery) at present provides electric energy to itself.And in order to
The safety and stability for guaranteeing internal battery, can be arranged special protection circuit, inside battery modules also to prevent battery
The risks such as appearance overcharges, over-discharge, short circuit, overcurrent and excess temperature.
Existing a kind of battery protection system as shown in Figure 1, including battery modules 1 and load mould group 2, wherein battery mould
Group 1 includes battery unit 11, battery protection unit 12, current detecting unit 13 and switch unit 14, wherein battery unit 11
Anode indicates that the cathode of battery unit is indicated with P- with P+.When current detecting unit 13 detects the output of battery unit 11/defeated
When entering controller, battery protection unit 12 will start overcurrent protection mechanism and send signal to switch unit 14, make to switch
Unit 14 controls battery unit 11 and stops input/output electric current.
In battery protection system shown in Fig. 1, battery unit 11 is often stored with certain electricity, battery list when leaving the factory
Member 11 is also constantly in supplying power for outside state.During the production of mobile terminal and after-sales service, battery modules 1 and movement
Before load circuit 21 in the load mould group (mainboard) 2 of terminal is unassembled, due to battery unit 11 anode and cathode always
In supplying power for outside state, it is thus possible to can have many security risks.For example, in assembling process battery unit 11 anode
With other metallic conductors of cathode contact, leads to anode and the cathode short circuit of battery unit 11, make battery unit 11 because short circuit occurs
It protects and closes electric current output；Or such as, the anode of battery unit 11 and cathode contact by mistake in the load mould group 2 of mobile terminal
Circuit causes the device in mobile terminal load mould group 2 to be damaged, etc..
Summary of the invention
The embodiment of the present invention provides a kind of battery protection system and mobile terminal, to eliminate because of the battery list in battery modules
Member is constantly in supplying power for outside state bring security risk.
In order to solve the above-mentioned technical problem, the present invention is implemented as follows:
In a first aspect, providing a kind of battery protection system, comprising: battery modules and load detecting unit, wherein described
Battery modules include: battery unit and battery protection unit；
The first end of the load detecting unit is connect with the battery protection unit, and the second of the load detecting unit
End is connect with the cell voltage end of the load mould group of the battery modules；
The load detecting unit, for determining target voltage, the target according to the cell voltage of the load mould group
Voltage is the voltage of the connecting pin of the battery protection unit and the load detecting unit；
The battery protection unit, for determining the load connection status of the battery modules according to the target voltage,
And the supplying power for outside state of the battery unit is controlled according to the load connection status.
Second aspect provides a kind of mobile terminal, which includes: battery protection system as described in relation to the first aspect
System.
Battery protection system provided in an embodiment of the present invention further includes load detecting unit in addition to including battery modules,
Middle battery modules include battery unit and battery protection unit；Load detecting unit can be according to the battery electricity of the load mould group
It presses and determines target voltage, the target voltage is the electricity of the connecting pin of the battery protection unit and the load detecting unit
Pressure；Battery protection unit can determine the load connection status of the battery modules according to the target voltage, and according to described
Load connection status controls the supplying power for outside state of the battery unit.Rather than the battery unit in battery modules is allowed to locate always
In supplying power for outside state, therefore can not only eliminate because battery unit is constantly in supplying power for outside state bring security risk,
Promote safety, it can also be ensured that normal power demand.
Detailed description of the invention
The drawings described herein are used to provide a further understanding of the present invention, constitutes a part of the invention, this hair
Bright illustrative embodiments and their description are used to explain the present invention, and are not constituted improper limitations of the present invention.In the accompanying drawings:
Fig. 1 is a kind of structural schematic diagram of battery protection system in the prior art.
Fig. 2 is a kind of structural schematic diagram of battery protection system provided in an embodiment of the present invention.
Fig. 3 is a kind of one of detailed construction schematic diagram of battery protection system provided in an embodiment of the present invention.
Fig. 4 is the two of a kind of detailed construction schematic diagram of battery protection system provided in an embodiment of the present invention.
Fig. 5 is the three of a kind of detailed construction schematic diagram of battery protection system provided in an embodiment of the present invention.
Fig. 6 is the four of a kind of detailed construction schematic diagram of battery protection system provided in an embodiment of the present invention.
Fig. 7 is the five of a kind of detailed construction schematic diagram of battery protection system provided in an embodiment of the present invention.
Specific embodiment
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation description, it is clear that described embodiments are some of the embodiments of the present invention, instead of all the embodiments.Based on this hair
Embodiment in bright, every other implementation obtained by those of ordinary skill in the art without making creative efforts
Example, shall fall within the protection scope of the present invention.
To solve in the prior art because the battery unit in battery modules is constantly in supplying power for outside state bring safety
Hidden danger, the embodiment of the present invention provide a kind of battery protection system and mobile terminal, the mobile terminal include but is not limited to mobile phone,
The terminal device of the transmitting/receiving wireless signal of communication such as IPAD, tablet computer, wearable device.
A kind of battery protection system provided in an embodiment of the present invention can also include load inspection in addition to including battery modules
Survey unit, wherein battery modules include battery unit and battery protection unit.
The first end of the load detecting unit is connect with the battery protection unit, and the second of the load detecting unit
End is connect with the cell voltage end of the load mould group of the battery modules；
The load detecting unit, for determining target voltage, the target according to the cell voltage of the load mould group
Voltage is the voltage of the connecting pin of the battery protection unit and the load detecting unit；
The battery protection unit, for determining the load connection status of the battery modules according to the target voltage,
And the supplying power for outside state of the battery unit is controlled according to the load connection status.
Specifically, battery protection unit, for determining the not connected load of the battery modules according to the target voltage
In the case where, the battery unit not supplying power for outside is controlled, alternatively, controlling the battery unit stops output electric current outward；In
In the case where determining the battery modules connection load according to the target voltage, the battery unit supplying power for outside is controlled, or
Person controls the battery unit and exports electric current outward.
Optionally, the battery modules can also include: switch unit, and the switch unit is connected on the battery unit
Anode and cathode between, and the switch unit is connect with the battery protection unit, and the switch unit is connect
Receive the control signal from the battery protection unit.
On this basis, the battery protection unit is particularly used according to the load connection status to the switch
Unit sends control signal, so that the switch unit controls the supplying power for outside shape of the battery unit according to the control signal
State.
In embodiments of the present invention, switch unit can be made of two metal-oxide-semiconductors, and one of metal-oxide-semiconductor is for controlling electricity
Pool unit externally exports electric current (supplying power for outside), another metal-oxide-semiconductor can be used for controlling battery unit and stop externally output electric current
(not supplying power for outside).Metal-oxide-semiconductor used both can be NMOS tube, or PMOS tube, the embodiment of the present invention do not limit this
It is fixed.
Battery protection system provided in an embodiment of the present invention, due to further including load detecting list in addition to including battery modules
Member, wherein battery modules include battery unit and battery protection unit；And load detecting unit can be according to the load mould group
Cell voltage determine that target voltage, the target voltage are the connections of the battery protection unit Yu the load detecting unit
The voltage at end；This allows battery protection unit to determine that the load of the battery modules connects shape according to the target voltage
State, and according to the supplying power for outside state for loading connection status and controlling the battery unit.Rather than it allows in battery modules
Battery unit is constantly in supplying power for outside state, therefore can not only eliminate because battery unit is constantly in supplying power for outside state band
The security risk come promotes safety, it can also be ensured that normal power demand.
Battery protection system provided in an embodiment of the present invention is described in detail with reference to the accompanying drawing.
Referring first to Fig. 2, Fig. 2 shows a kind of structural representations of battery protection system provided in an embodiment of the present invention
Figure.As shown in Fig. 2, the battery protection system is in addition to including battery modules 1, it further include load detecting unit 3.Wherein, battery mould
Group 1 may include: battery unit 11 and battery protection unit 12.
In embodiments of the present invention, battery unit 11 may include at least one serial or parallel connection battery, battery unit 11
Both it can externally discharge, can also be charged by outside to it.Battery protection unit 12 can be by IC chip and peripheral components
Composition, for cooperating the mistake for realizing battery unit 11 with other circuit units (such as current detecting unit 13, switch unit 14)
It puts, overcharge, short circuit, overcurrent, the protection mechanisms such as excess temperature, and cooperating the load for realizing battery unit to connect with load detecting unit 3
Connect state-detection etc..For example, when charging to battery unit 11, if detecting charging current mistake by current detecting unit 13
Greatly, then it can control the disconnection of switch unit 14, realize overcurrent protection；For another example, when charging to battery unit 11, if detected
11 overtension of battery unit also can control the disconnection of switch unit 14, realize overvoltage protection.
In Fig. 2, the first end 34 of load detecting unit 3 is connect with battery protection unit 12, and the of load detecting unit 3
The cell voltage (V Battery, VBAT) of two ends 35 and the load mould group 2 of battery modules 1, which is held, to be connected.
In Fig. 2, load detecting unit 3, for determining target voltage according to the cell voltage (VBAT) of load mould group 2
(being shown with VID table), target voltage are the voltage of the connecting pin of battery protection unit 12 and load detecting unit 3.
In Fig. 2, battery protection unit 12, for determining that the load of battery modules 1 connects shape according to target voltage (VID)
State, and according to the supplying power for outside state of the load connection status control battery unit 11.
Specifically, battery protection unit 12, can be used for determining the battery modules not connected the case where loading according to VID
Under, the battery unit not supplying power for outside is controlled, alternatively, controlling the battery unit stops output electric current outward；According to VID
In the case where determining the battery modules connection load, the battery unit supplying power for outside is controlled, alternatively, controlling the battery list
First output electric current outward.
The battery protection system that embodiment shown in Fig. 2 provides, due to further including load detecting in addition to including battery modules 1
Unit 3, and load detecting unit 3 can determine that target voltage, target voltage are that battery is protected according to the cell voltage of load mould group 2
Protect the voltage of the connecting pin of unit 12 and load detecting unit 3；Battery protection unit 12 can determine battery according to target voltage
The load connection status of mould group 1, and according to the supplying power for outside state of load connection status control battery unit 11.Rather than allow electricity
Pool unit 11 is constantly in supplying power for outside state, therefore can not only eliminate because battery unit 11 is constantly in supplying power for outside state
Bring security risk promotes safety, it can also be ensured that normal power demand.
Secondly referring to FIG. 3, Fig. 3 is a kind of a kind of detailed construction schematic diagram of battery protection system shown in Fig. 2.Such as figure
Shown in 3, which, in addition to including battery modules 1, further includes load detecting unit 3.Wherein, battery modules 1 can be with
It include: battery unit 11 and battery protection unit 12.
In Fig. 3, the first end 34 of load detecting unit 3 is connect with battery protection unit 12, and the of load detecting unit 3
Two ends 35 are equipped with the first pin (LID pin) 32, load and are equipped with second pin (and LID pin) 22 in mould group 2, and second draws
Foot 22 and the cell voltage (VBAT) of load mould group 2 are held and are connected.Wherein, the second end 35 of load detecting unit 3 passes through
The connection at cell voltage (VBAT) end of one pin 32 and second pin 22 and load mould group 2.Specifically, the first pin 32 and
After two pins 22 are connected by conducting wire, the second end 35 of load detecting unit 3 and the battery electricity of load mould group 2 can be realized
Press the connection at the end (VBAT).
In Fig. 3, load detecting unit 3, for determining target voltage according to the cell voltage (VBAT) of load mould group 2
(being shown with VID table), target voltage are the voltage of the connecting pin of battery protection unit 12 and load detecting unit 3.
In Fig. 3, battery protection unit 12, for determining that the load of battery modules 1 connects shape according to target voltage (VID)
State, and according to the supplying power for outside state of the load connection status control battery unit 11.
Specifically, battery protection unit 12, can be used for determining the battery modules not connected the case where loading according to VID
Under, the battery unit not supplying power for outside is controlled, alternatively, controlling the battery unit stops output electric current outward；According to VID
In the case where determining the battery modules connection load, the battery unit supplying power for outside is controlled, alternatively, controlling the battery list
First output electric current outward.
It is appreciated that battery protection system shown in Fig. 3, can obtain identical with battery protection system shown in Fig. 2
Technical effect is not repeated to describe herein.
Then referring to FIG. 4, Fig. 4 is a kind of a kind of more detailed structural representation of battery protection system shown in Fig. 3
Figure.As shown in figure 4, the battery protection system is in addition to including battery modules 1, it further include load detecting unit 3.Battery modules 1 can
To include: battery unit 11 and battery protection unit 12.
In Fig. 4, load detecting unit 3 may include first resistor R1 and second resistance R2.The electricity of first resistor R1 and second
One end of resistance R2 is connect respectively with battery protection unit 12 namely the first end 34 and battery protection unit of load detecting unit 3
12 connections.The other end of first resistor R1 is connect with the cathode (P-) of battery unit 11, specifically through excessive current detection unit 13
It is connect with after switch unit 14 with the cathode (P-) of battery unit 11.The other end of second resistance R2 and the electricity of load mould group 2
The connection of cell voltage end.Namely the second end 35 and the feelings that connect of cell voltage end of load mould group 2 in load detecting unit 3
Under condition, first resistor R1 is connected between voltage protection unit 12 and the cathode (P-) of battery unit 11, second resistance R2 series connection
Between voltage protection unit 12 and the cell voltage end of load mould group 2.
Further, the second end 35 of load detecting unit 3 is equipped with the first pin (LID pin) 32, loads and sets in mould group 2
There is second pin (and LID pin) 22, and the cell voltage (VBAT) of second pin 22 and load mould group 2 is held and connected.Wherein,
The other end of second resistance R2 passes through the connection at the cell voltage end of the first pin 32 and second pin 22 and load mould group 2；And
And in the case where the other end of second resistance R2 is connect with the cell voltage end of load mould group 2, second resistance R2 is connected on electricity
Between pond protection location 12 and the first pin 32.
From fig. 4, it can be seen that entire load detecting unit 3 is arranged in battery modules 1 namely first resistor R1 and second
Resistance R2 is arranged in battery modules 1.
In battery protection system shown in Fig. 4, load detecting unit 3, for the battery electricity according to the load mould group
Pressure, the resistance value of the resistance value of the first resistor and the second resistance, determine the target voltage.Battery protection unit 12 is used
Whether fallen in predetermined voltage range according to the target voltage, determines the load connection status of the battery modules, and root
The supplying power for outside state of the battery unit is controlled according to the load connection status.
Specifically, in one example, when battery modules 1 are not connect with load mould group 2, namely when battery unit 11
When positive and negative anodes are not held with the cell voltage (VBAT) in load mould group 2 and ground connection (GND) end is correspondingly connected with, target voltage
(VID) it can be dragged down by first resistor R1, the VID that load detecting unit 3 is determined is lower.
Correspondingly, battery protection unit 12 according to the VID for being in reduced levels, can determine that battery modules 1 are not connected negative
It carries, therefore can control the not supplying power for outside of battery unit 11, namely can control battery unit 11 and stop externally exporting electric current.More
For specifically, as shown in figure 4, battery protection unit 12 can be to switch unit when being equipped with switch unit 14 in battery modules 1
14 send the control signal that control switch units 14 disconnect, to realize the purpose of control battery unit 11 not supplying power for outside.
Specifically, in another example, when battery modules 1 are connect with load mould group 2, namely when battery unit 11
When positive and negative anodes are correspondingly connected with the end VBAT and the end GND loaded in mould group 2, VBAT is arrived by second resistance R2 and first resistor R1
The cathode (P-) of battery unit 11, then
VID=VBAT*R1/ (R1+R2).
For example, if VBAT is 2.8~4.4V, R1=R2=100K Ω, then VID=14.~2.2V.Correspondingly,
If VID falls in 14.~2.2V within the scope of this, then it represents that battery modules 1 are connected to load, therefore can control battery unit
11 supplying power for outside, namely can control battery unit 11 and open externally output electric current.More specifically, as shown in figure 4, working as battery
When being equipped with switch unit 14 in mould group 1, battery protection unit 12 can send control switch unit 14 to switch unit 14 and be closed
Control signal, with realize control 11 supplying power for outside of battery unit purpose.
It can be seen that battery protection system shown in Fig. 4, can control therein in the case where battery modules 1 are connected and loaded
11 supplying power for outside of battery unit controls battery unit 11 therein and stops externally in the case where the not connected load of battery modules 1
Power supply, rather than battery unit 11 is made to be constantly in supplying power for outside state, this can not only be eliminated because battery unit 11 is located always
In supplying power for outside state bring security risk, safety is promoted, it can also be ensured that normal power demand.
Then referring to FIG. 5, the more detailed structure of another kind that Fig. 5 is a kind of battery protection system shown in Fig. 3 is shown
It is intended to.As shown in figure 5, the battery protection system is in addition to including battery modules 1, it further include load detecting unit 3.Battery modules 1
It may include: battery unit 11 and battery protection unit 12.
In Fig. 5, load detecting unit 3 may include first resistor R1 and voltage-stablizer 31.First resistor R1 and voltage-stablizer 31
One end connect respectively with battery protection unit 12 namely the first end 34 of load detecting unit 3 and battery protection unit 12 connect
It connects.The other end of first resistor R1 is connect with the cathode (P-) of battery unit 11, specifically excessive current detection unit 13 and is opened
Unit 14 is closed to connect with the cathode (P-) of battery unit 11 later.The other end of voltage-stablizer 31 and the cell voltage of load mould group 2
End connection.Namely in the case where the second end 35 of load detecting unit 3 is connect with the cell voltage end of load mould group 2,
First resistor R1 is connected between voltage protection unit 12 and the cathode (P-) of battery unit 11, and voltage-stablizer 31 is connected on voltage guarantor
It protects between unit 12 and the cell voltage end for loading mould group 2.
Further, the second end of load detecting unit 3 is equipped with the first pin (LID pin) 32, loads and is equipped in mould group 2
Second pin (and LID pin) 22, and the cell voltage (VBAT) of second pin 22 and load mould group 2 is held and is connected.Wherein, surely
The other end of depressor 31 passes through the connection at the cell voltage end of the first pin 32 and second pin 22 and load mould group 2；Also,
In the case where the other end of voltage-stablizer 31 is connect with the cell voltage end of load mould group 2, voltage-stablizer 31 is connected on battery protection
Between unit 12 and the first pin 32.
From fig. 5, it can be seen that entire load detecting unit 3 is arranged in battery modules 1 namely first resistor R1 and pressure stabilizing
Device 31 is arranged in battery modules 1.
In battery protection system shown in Fig. 4, load detecting unit 3 is true for the output voltage according to voltage-stablizer 31
Set the goal voltage (VID), wherein the input voltage of voltage-stablizer 31 is the cell voltage (VBAT) for loading mould group 2.Battery protection list
Member 12 determines the load connection status of the battery modules for whether being given voltage according to the target voltage, and according to
The load connection status controls the supplying power for outside state of the battery unit.
Specifically, in one example, when battery modules 1 are not connect with load mould group 2, namely when battery unit 11
When positive and negative anodes are not held with the cell voltage (VBAT) in load mould group 2 and ground connection (GND) end is correspondingly connected with, target voltage
(VID) it can be dragged down by first resistor R1, the VID that load detecting unit 3 is determined is lower.
Correspondingly, battery protection unit 12 according to the VID for being in reduced levels, can determine that battery modules 1 are not connected negative
It carries, therefore can control the not supplying power for outside of battery unit 11, namely can control battery unit 11 and stop externally exporting electric current.More
For specifically, as shown in figure 5, battery protection unit 12 can be to switch unit when being equipped with switch unit 14 in battery modules 1
14 send the control signal that control switch units 14 disconnect, to realize the purpose of control battery unit 11 not supplying power for outside.
Specifically, in another example, in the case that battery modules 1 are connect with load mould group 2, namely working as battery list
In the case that the positive and negative anodes of member 11 and the end VBAT in load mould group 2 and the end GND are correspondingly connected with, VBAT is converted by voltage-stablizer 31
It exports given voltage (such as 1.8V).Correspondingly, if battery protection unit 12 detects that VID is equal to 1.8V, then it represents that battery mould
Group 1 is connected to load, therefore can control 11 supplying power for outside of battery unit, namely can control battery unit 11 open it is external defeated
Electric current out.More specifically, as shown in figure 5, when being equipped with switch unit 14 in battery modules 1, battery protection unit 12 can be with
The control signal that control switch unit 14 is closed is sent to switch unit 14, to realize the mesh of control 11 supplying power for outside of battery unit
's.
It can be seen that battery protection system shown in fig. 5, can control therein in the case where battery modules 1 are connected and loaded
11 supplying power for outside of battery unit controls battery unit 11 therein and stops externally in the case where the not connected load of battery modules 1
Power supply, rather than so that battery unit 11 is constantly in supplying power for outside state, therefore can not only eliminate because of battery unit 11 always
In supplying power for outside state bring security risk, safety is promoted, it can also be ensured that normal power demand.
It should be noted that in embodiments of the present invention, voltage-stablizer 31 can include but is not limited to low pressure difference linearity pressure stabilizing
Device (low dropout regulator, LDO).
Fig. 4 and battery protection system shown in fig. 5 are corresponded respectively to, Fig. 6 and Fig. 7 also show offer of the embodiment of the present invention
Battery protection system other two kinds of more detailed structural schematic diagrams.
Battery protection system shown in fig. 6 and battery protection system shown in Fig. 4 the difference is that, second resistance R2
Setting position, in battery protection system shown in Fig. 4, second resistance R2 is arranged in battery modules 1；And it is shown in Fig. 6
Battery protection system in, second resistance R2 setting load mould group 2 in, second resistance R2 is specifically connected on second pin 22
Between cell voltage end.
Battery protection system shown in Fig. 7 and battery protection system shown in fig. 5 the difference is that, voltage-stablizer 31
Position is set, and in battery protection system shown in Fig. 5, voltage-stablizer 31 is arranged in battery modules 1；And electricity shown in Fig. 6
In pond protection system, the setting of voltage-stablizer 31 is in load mould group 1.
In battery protection system shown in Fig. 7, by the part detection circuit setting in load detecting unit 3 in load mould
Meaning in group 2 is, can set voltage-stablizer 31 in load mould group 2 and export given voltage (such as 1.8V), to cooperate battery mould
Battery protection unit 12 judges whether the VID detected is the given voltage in group 1, so that it is determined that the load of battery modules 1 connects
State is connect, guarantees only have VID to be equal to the given voltage, load has just been judged and has been connected to battery modules 1, and is equal to it in VID
When his given voltage (such as 2.0V), will not be judged as has load to be connected to battery modules 1.It can guarantee only specifically to bear in this way
When carrying mould group (load equipment in other words) 2 and accessing battery modules 1, the battery unit ability supplying power for outside in battery modules 1, thus anti-
Only battery modules 1 are diverted by other loads (or equipment).
Similarly, in battery protection system shown in Fig. 6, the part detection circuit setting in load detecting unit 3 is existed
Meaning in load mould group 2 is, can set the size of second resistance R2 in load mould group 2, electric to cooperate in battery modules 1
Pond protection location 12 judges whether the VID detected falls in predetermined voltage range, so that it is determined that the load of battery modules 1 connects
State, guarantee only have VID fall in the predetermined voltage range (rather than other predetermined voltage ranges) it is interior when, just judged load connect
Battery modules 1 are connected to, and when VID falls into other predetermined voltage ranges, will not be judged as has load to be connected to battery modules 1.
When can guarantee that only specifically loading mould group (load equipment in other words) 2 accesses battery modules 1 in this way, in battery modules 1
Battery unit ability supplying power for outside, to prevent battery modules 1 from being diverted by other loads (or equipment).
Optionally, as shown in Figures 2 to 7, the battery protection system that any embodiment of the present invention provides can also include:
Current detecting unit 13.
Current detecting unit 13 can be used for detecting the electric current for inputting or exporting battery unit 11, and will test
Electric current be sent to battery protection unit 12 so that battery protection unit 12 input or export battery unit 11 electric current be more than
When predetermined current, start overcurrent protection mechanism, realizes the overcurrent protection to battery unit 11.
On the basis of above-mentioned battery protection system provided in an embodiment of the present invention, the embodiment of the invention also provides one kind
Mobile terminal, the mobile terminal may include: the battery protection system that any embodiment of the present invention provides.
Since mobile terminal provided in an embodiment of the present invention includes battery protection system provided in an embodiment of the present invention, because
This, mobile terminal provided in an embodiment of the present invention can also be eliminated because the battery unit in battery modules is constantly in supplying power for outside shape
State bring security risk promotes safety, and guarantees normal power demand.
It should be noted that, in this document, the terms "include", "comprise" or its any other variant are intended to non-row
His property includes, so that the process, method, article or the device that include a series of elements not only include those elements, and
And further include other elements that are not explicitly listed, or further include for this process, method, article or device institute it is intrinsic
Element.In the absence of more restrictions, the element limited by sentence "including a ...", it is not excluded that including being somebody's turn to do
There is also other identical elements in the process, method of element, article or device.
Through the above description of the embodiments, those skilled in the art can be understood that above-described embodiment side
Method can be realized by means of software and necessary general hardware platform, naturally it is also possible to by hardware, but in many cases
The former is more preferably embodiment.Based on this understanding, technical solution of the present invention substantially in other words does the prior art
The part contributed out can be embodied in the form of software products, which is stored in a storage medium
In (such as ROM/RAM, magnetic disk, CD), including some instructions are used so that a terminal (can be mobile phone, computer, service
Device, air conditioner or network equipment etc.) execute method described in each embodiment of the present invention.
The embodiment of the present invention is described with above attached drawing, but the invention is not limited to above-mentioned specific
Embodiment, the above mentioned embodiment is only schematical, rather than restrictive, those skilled in the art
Under the inspiration of the present invention, without breaking away from the scope protected by the purposes and claims of the present invention, it can also make very much
Form belongs within protection of the invention.
Claims (10)
1. a kind of battery protection system, which is characterized in that the system comprises: battery modules and load detecting unit, wherein institute
Stating battery modules includes: battery unit and battery protection unit；
The first end of the load detecting unit is connect with the battery protection unit, the second end of the load detecting unit with
The cell voltage end connection of the load mould group of the battery modules；
The load detecting unit, for determining target voltage, the target voltage according to the cell voltage of the load mould group
It is the voltage of the connecting pin of the battery protection unit and the load detecting unit；
The battery protection unit, for determining the load connection status of the battery modules, and root according to the target voltage
The supplying power for outside state of the battery unit is controlled according to the load connection status.
2. system according to claim 1, which is characterized in that
The load detecting unit includes first resistor and second resistance；
It is described in the case where the second end of the load detecting unit is connect with the cell voltage end of the load mould group
First resistor is connected between the voltage protection unit and the cathode of the battery unit, and the second resistance is connected on described
Between voltage protection unit and the cell voltage end of the load mould group.
3. system according to claim 2, which is characterized in that
The second end of the load detecting unit is equipped with the first pin, and second pin, and institute are equipped in the load mould group
Second pin is stated to connect with the cell voltage end of the load mould group；
Wherein, the second end of the load detecting unit is born by first pin and the second pin with described
Carry the cell voltage end connection of mould group；
It is described in the case where the second end of the load detecting unit is connect with the cell voltage end of the load mould group
Second resistance is connected between the battery protection unit and first pin, alternatively, the second resistance be connected on it is described
Between second pin and the cell voltage end of the load mould group.
4. system according to claim 2 or 3, which is characterized in that
The load detecting unit, for according to the resistance value of the load cell voltage of mould group, the first resistor and described
The resistance value of second resistance determines the target voltage；
The battery protection unit determines the battery for whether falling in predetermined voltage range according to the target voltage
The load connection status of mould group, and according to the supplying power for outside state for loading connection status and controlling the battery unit.
5. system according to claim 1, which is characterized in that
The load detecting unit includes first resistor and voltage-stablizer；
It is described in the case where the second end of the load detecting unit is connect with the cell voltage end of the load mould group
First resistor is connected between the voltage protection unit and the cathode of the battery unit, and the voltage-stablizer is connected on the electricity
It presses between protection location and the cell voltage end of the load mould group.
6. system according to claim 5, which is characterized in that
The second end of the load detecting unit is equipped with the first pin, and second pin, and institute are equipped in the load mould group
Second pin is stated to connect with the cell voltage end of the load mould group；
Wherein, the second end of the load detecting unit is born by first pin and the second pin with described
Carry the cell voltage end connection of mould group；
It is described in the case where the second end of the load detecting unit is connect with the cell voltage end of the load mould group
Voltage-stablizer is connected between the battery protection unit and first pin, alternatively, the voltage-stablizer is connected on described second
Between pin and the cell voltage end of the load mould group.
7. system according to claim 5 or 6, which is characterized in that
The load detecting unit, for determining the target voltage, the voltage-stablizer according to the output voltage of the voltage-stablizer
Output voltage be to it is described load mould group cell voltage be converted to；
The battery protection unit determines the negative of the battery modules for whether being given voltage according to the target voltage
Connection status is carried, and controls the supplying power for outside state of the battery unit according to the load connection status.
8. system according to claim 5 or 6, which is characterized in that
The voltage-stablizer is low pressure difference linear voltage regulator.
9. system according to claim 1, which is characterized in that the battery modules further include: switch unit；
The battery protection unit, for sending control signal to the switch unit according to the load connection status, so that
The switch unit controls the supplying power for outside state of the battery unit according to the control signal.
10. a kind of mobile terminal characterized by comprising battery protection system as described in any one of claim 1 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910703074.4A CN110445206A (en) | 2019-07-31 | 2019-07-31 | Battery protection system and mobile terminal |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910703074.4A CN110445206A (en) | 2019-07-31 | 2019-07-31 | Battery protection system and mobile terminal |
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| CN110445206A true CN110445206A (en) | 2019-11-12 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201910703074.4A Pending CN110445206A (en) | 2019-07-31 | 2019-07-31 | Battery protection system and mobile terminal |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114256954A (en) * | 2020-09-22 | 2022-03-29 | 海能达通信股份有限公司 | Control circuit and battery |
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| CN114256954B (en) * | 2020-09-22 | 2024-06-25 | 海能达通信股份有限公司 | Control circuit and battery |
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Application publication date: 20191112 |