CN205489484U - Protection of secondary battery and power supply module - Google Patents
Protection of secondary battery and power supply module Download PDFInfo
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- CN205489484U CN205489484U CN201620154710.4U CN201620154710U CN205489484U CN 205489484 U CN205489484 U CN 205489484U CN 201620154710 U CN201620154710 U CN 201620154710U CN 205489484 U CN205489484 U CN 205489484U
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Abstract
The utility model discloses a protection of secondary battery and power supply module. This protection of secondary battery is used for the group battery protection including the N economize on electricity pond together of establishing ties, and the device includes: positive output terminal and burden output terminal for insert external equipment, positive output terminal still connects the positive pole of group battery, and burden output terminal still connects the negative pole of group battery, a M fuse is with N festival A series of cells, first switch module, including controlled terminal, the first terminal and second terminal, between the first terminal and the group battery positive pole via the M fuse in at least one fuse be connected, the second terminal is connected with the group battery negative pole, a control module is connected with controlled terminal for connect at least a lesson battery, detect the battery state information of the battery of connection, judge that whether battery state information satisfies battery protection triggering condition, controls first switch module and switches on, so that the group battery short circuit when satisfying. From this, can realize the protection to the high reliability of battery with the low cost.
Description
Technical field
This utility model relates to field of batteries, in particular it relates to a kind of battery protecting apparatus and power supply module.
Background technology
Digital product (such as, notebook computer) generally uses lithium ion battery as power supply, lithium ion
Battery has energy density feature high, lightweight.Due to the product attribute of lithium ion battery, it is right to need
The protections such as battery is charged, electric discharge, to guarantee the safety during using.
Existing in the battery protecting apparatus of notebook computer, three end electric fuses are all used to realize
Lithium ion battery is overcharged protection.But, the structure of three end electric fuses is complex, and product price is high,
This circuit resulting in battery protecting apparatus is complex and relatively costly.
Utility model content
The purpose of this utility model is to provide a kind of battery protecting apparatus and power supply module, comes with low cost real
The protection of the high reliability of the battery in existing logarithmic code product.
To achieve these goals, this utility model provides a kind of battery protecting apparatus, for set of cells
Protecting, described set of cells includes the N batteries being cascaded, wherein, N >=1, described dress
Putting and include: positive output terminal and negative output terminal, be used for accessing external equipment, described positive output terminal is also
For connecting the positive pole of described set of cells, described negative output terminal is additionally operable to connect the negative of described set of cells
Pole；M electric fuse, for connecting with described N batteries, wherein, M >=1；First switch module,
Including controlled terminal, the first terminal and the second terminal, wherein, described the first terminal and described set of cells
Between positive pole via in described M electric fuse at least one electric fuse connect, described second terminal with
The negative pole of described set of cells connects；First control module, with the described controlled end of described first switch module
Son connects, for connecting at least one batteries in described set of cells, and the battery of the battery that detection is connected
Status information, and judge whether described battery status information meets the battery protection trigger condition preset,
Determine when described battery status information meets described battery protection trigger condition, control described first switches set
Part turns on, so that described set of cells short circuit.
Alternatively, described M electric fuse includes M current insurance silk or M Thermal Cutoffs；
Or, described M electric fuse includes M1 current insurance silk and M2 Thermal Cutoffs, wherein,
M1+M2=M.
Alternatively, described M electric fuse includes M3 Thermal Cutoffs, wherein, M3=N, and
Described M3 Thermal Cutoffs is connected with described N batteries alternative expression.
Alternatively, described first control module includes that the first control chip, described first control chip include
First control terminal and with described N batteries the most N number of first input end, wherein, often
Individual described first input end is for connecting the positive pole of corresponding battery, described first control terminal and institute
The described controlled terminal stating the first switch module connects, and described first control chip is for via described N number of
First input end gathers the battery status information of each batteries, and whether judges described battery status information
Meet the battery protection trigger condition preset, determining that described battery status information meets described battery protection
During trigger condition, send the first control letter via described first control terminal to described first switch module
Number, described first control signal is used for controlling described first switch module conducting.
Alternatively, described battery status information includes the voltage of battery；And, described first control module
Including voltage collection circuit and voltage comparator circuit, wherein: described voltage collection circuit includes the first output
Terminal and second input terminal the most N number of with described N batteries, wherein, each described
Two input terminals are for connecting the positive pole of corresponding battery, and described voltage collection circuit is for via described
N number of second input terminal gathers the voltage of each batteries, and by described first lead-out terminal output voltage
Signal；Described voltage comparator circuit includes the 3rd input terminal and the second lead-out terminal, wherein, described
Three input terminals are connected with described first lead-out terminal, described second lead-out terminal and described first switches set
The described controlled terminal of part connects, and described voltage comparator circuit will be for connecing via described 3rd input terminal
The voltage signal received compares with the voltage range preset, and at described voltage signal beyond described electricity
During pressure scope, send the second control signal via described second lead-out terminal to described first switch module,
Described second control signal is used for controlling described first switch module conducting.
Alternatively, described first switch module includes metal-oxide-semiconductor, wherein, and the grid of described metal-oxide-semiconductor
Being connected with described controlled terminal, the source electrode of described metal-oxide-semiconductor is connected with described second terminal, described MOS
The drain electrode of pipe is connected with described the first terminal.
Alternatively, the every batteries in described set of cells is lithium ion battery.
Alternatively, described device also includes: second switch assembly, is connected on described positive output terminal and institute
State between the described the first terminal of the first switch module；3rd switch module, is connected on described positive output end
Between the described the first terminal of sub and described first switch module, and connect with described second switch assembly；
Second control module, is connected with described second switch assembly, and is connected with described 3rd switch module, institute
State the second control module at least one batteries connecting in described set of cells, the battery that detection is connected
Battery status information, and judge that whether described battery status information meets the protection that overcharges preset and trigger bar
Part and Cross prevention trigger condition, determining that described battery status information overcharges protection triggering bar described in meeting
During part, control described second switch assembly and disconnect, so that described set of cells open circuit, and described determining
When battery status information meets described Cross prevention trigger condition, control described 3rd switch module and disconnect,
So that described set of cells open circuit.
Alternatively, described second control module is also with the described controlled terminal of described first switch module even
Connect, for when described battery status information meets described battery protection trigger condition, control described first
Switch module turns on, so that described set of cells short circuit.
Alternatively, described second control module includes that the second control chip, described second control chip include
Second control terminal, the 3rd control terminal and fourth input the most N number of with described N batteries
Terminal, wherein, each described four-input terminal for connecting the positive pole of corresponding battery, described the
Two control terminals are connected with described second switch assembly, described 3rd control terminal and described 3rd switches set
Part connects, and described second control chip is for gathering each batteries via described N number of four-input terminal
Battery status information, and judge described battery status information whether meet preset overcharge protection trigger condition
With Cross prevention trigger condition, determining that described battery status information overcharges protection trigger condition described in meeting
Time, send the 3rd control signal via described second control terminal to described second switch assembly, described the
Three control signals are used for controlling described second switch assembly and disconnect, and are determining described battery status information
When meeting described Cross prevention trigger condition, via described 3rd control terminal to described 3rd switch module
Sending the 4th control signal, described 4th control signal is used for controlling described 3rd switch module and disconnects.
Alternatively, described second control chip also includes the 4th control terminal, the 4th control terminal and institute
The described controlled terminal stating the first switch module connects, and described second control chip is additionally operable at described battery
When status information meets described battery protection trigger condition, via described 4th control terminal to described first
Switch module sends the 5th control signal, and described 5th control signal is used for controlling described first switch module
Conducting, so that described set of cells short circuit.
This utility model also provides for a kind of power supply module, including: set of cells, including the N being cascaded
Batteries, wherein, N >=1；And battery protecting apparatus, according to this battery protecting apparatus, this practicality is new
The described battery protecting apparatus that type provides.
In technique scheme, by the battery status information of the first control module collection battery, and
When battery status information meets default battery protection trigger condition, control the first switch module conducting, the
The conducting of one switch module makes set of cells be shorted.Owing to set of cells is shorted, cause the wink in circuit
Time electric current uprush so that blown fuse, and then make set of cells open circuit, thus realize battery
The protection of group.In the battery protecting apparatus that this utility model provides, use the electric fuse of function singleness i.e.
The protection quickly and efficiently to set of cells can be realized, and without arranging baroque three end electric fuses,
Therefore, while realizing set of cells is carried out omnibearing protection, simplify circuit design, reduce
Cost, simple and reliable, it is easy to implement, it is adaptable to require in the digital product of structure simplification, dependable performance.
Other feature and advantage of the present utility model will give in detailed description of the invention part subsequently in detail
Explanation.
Accompanying drawing explanation
Accompanying drawing is used to offer and is further appreciated by of the present utility model, and constitutes one of description
Point, it is used for explaining this utility model together with detailed description below, but is not intended that this practicality
Novel restriction.In the accompanying drawings:
Fig. 1 shows the circuit diagram of the existing battery protecting apparatus for notebook computer.
Fig. 2 A to Fig. 2 E shows the battery protecting apparatus according to numerous embodiments of the present utility model
Circuit diagram.
Fig. 3 shows the circuit diagram of the battery protecting apparatus according to another embodiment of the present utility model.
Fig. 4 shows the circuit diagram of the battery protecting apparatus according to another embodiment of the present utility model.
Fig. 5 shows the circuit diagram of the battery protecting apparatus according to another embodiment of the present utility model.
Fig. 6 shows the circuit diagram of the battery protecting apparatus according to another embodiment of the present utility model.
Detailed description of the invention
Below in conjunction with accompanying drawing, detailed description of the invention of the present utility model is described in detail.It is to be understood that
It is that detailed description of the invention described herein is merely to illustrate and explains this utility model, is not used to limit
This utility model processed.
Fig. 1 shows the circuit diagram of the existing battery protecting apparatus for notebook computer.Such as Fig. 1 institute
Show, existing battery protecting apparatus 10 can include control module 101, switch module 102 and three ends
Electric fuse 103, control module 101 can gather each batteries (that is, battery B1, the electricity in set of cells
Pond B2 and battery B3) voltage, and when the voltage collected exceedes default voltage threshold (i.e.,
Battery is in the state of overcharging), control switch module 102 and turn on, thus the three end electric fuses 103 that fuse, with
Realization overcharges protection.Owing to the structure of three end electric fuses 103 is complex, product price is high, and this just leads
The circuit causing battery protecting apparatus 10 is complex, relatively costly.
In order to solve this problem, this utility model provides a kind of battery protecting apparatus, wherein, this battery
Protection device can apply in various digital product, such as, and notebook computer, panel computer, intelligence
Mobile phone etc..Fig. 2 A shows the battery protecting apparatus 20 according to a kind of embodiment of the present utility model
Circuit diagram, this battery protecting apparatus 20 is for protecting set of cells, and wherein, this set of cells can
To include the N batteries being cascaded, wherein, N >=1.Illustrate for convenience, show in fig. 2
Show to example three batteries that set of cells includes being cascaded, respectively battery B1, battery B2
With battery B3.It will be understood however, that set of cells can also include lesser amount of or most
The battery of amount.Illustratively, the battery that set of cells includes can be lithium battery.
When the series connection of N batteries forms set of cells, being positioned at the one in the battery at set of cells two ends can expose
The anode of self, another one can expose the battery cathode of self.In this utility model, this exposure
Anode can be as the positive pole of whole set of cells, the battery cathode of this exposure can be as whole electricity
The negative pole of pond group.Such as, as shown in Figure 2 A, the positive pole of battery B1 is exposed, therefore, and battery B1
Positive pole as the positive pole of set of cells.Equally, the negative pole of battery B3 is exposed, therefore, and battery B3
Negative pole as the negative pole of set of cells.
Battery protecting apparatus 20 can include positive output terminal 201 and negative output terminal 202, is used for accessing
External equipment, additionally, positive output terminal 201 is additionally operable to connect the positive pole of set of cells, negative output terminal 202
It is additionally operable to connect the negative pole of set of cells.
In this utility model, external equipment can be, for example the charging being charged for set of cells and sets
Standby, or can e.g. by set of cells to its power supply so that it obtains any electronic equipment of electric work, example
As, the load circuit in notebook computer.When positive output terminal 201 and negative output terminal 202 are accessed
External equipment when being charger, set of cells can be in charge mode；When positive output terminal 201 is with negative
The external equipment that lead-out terminal 202 is accessed be set of cells when the electronic equipment that it is powered, set of cells meeting
It is in discharge mode.
Battery protecting apparatus 20 can include M electric fuse, for connecting with N batteries, wherein,
M≥1.Illustrate for convenience, schematically illustrate battery protecting apparatus 20 in fig. 2 and include one
Individual electric fuse F1, wherein, this electric fuse F1 can for example, current insurance silk.Additionally, such as Fig. 2 A
Shown in, this battery protecting apparatus 20 can also include the first switch module 203, and it can include controlled end
Sub-203a, the first terminal 203b and the second terminal 203c, wherein, the first terminal 203b and set of cells
Positive pole between can via in M electric fuse at least one electric fuse connect, as a example by Fig. 2 A,
It is connected via current insurance silk F1 between the first terminal 203b and the positive pole of set of cells.Additionally, the second end
Sub-203c is connected with the negative pole of set of cells.
Additionally, as shown in Figure 2 A, battery protecting apparatus 20 can also include the first control module 204,
It is connected with the controlled terminal 203a of the first switch module 203, for connecting at least one joint in set of cells
Battery, the battery status information of the battery that detection is connected, and judge whether this battery status information meets
The battery protection trigger condition preset, is determining that this battery status information meets battery protection trigger condition
Time, control the first switch module 203 and turn on.As it has been described above, the first terminal of the first switch module 203
It is connected via at least one electric fuse in M electric fuse between 203b and the positive pole of set of cells, second
Terminal 203c is connected with the negative pole of set of cells.In the case of normally working in set of cells, electric fuse
Resistance value the least, its produce dividing potential drop be negligible.Therefore, lead when the first switch module 203
Time logical, the cathode voltage of set of cells is substantially identical with the cathode voltage of set of cells, thus causes set of cells
It is shorted.Owing to set of cells is shorted, the transient current in circuit is caused to be uprushed, so that electric current is protected
Danger silk F1 fusing, and then make set of cells open circuit, thus realize the protection to set of cells.
In this utility model, battery status information can include but not limited at least in following parameter
Person: the voltage of battery, the electric current of battery, the capacity of battery.Correspondingly, battery protection trigger condition can
To include but not limited at least one in following condition: the battery of the predetermined quantity in the battery connected
Voltage beyond preset first voltage range (by the first voltage threshold preset and the second voltage threshold institute
Limiting, wherein, the first voltage threshold is more than the second voltage threshold)；Predetermined number in the battery connected
The capacity of the battery of amount (is held by the first capacity threshold preset and second beyond the first range of capacity preset
Amount threshold value is limited, and wherein, the first capacity threshold is more than the second capacity threshold)；Between battery unbalanced.
Wherein, this predetermined quantity can be 1, or the total L of the battery by being connected, or is 1 to L
Between any value.
Illustratively, under battery is in charge mode, the battery collected when the first control module 204
When voltage is higher than the upper limit (that is, first voltage threshold) of first voltage range, (or the capacity of battery is high
The upper limit (that is, the first capacity threshold) in the first range of capacity), then the first control module 204 can be true
Fixed now battery is in the state of overcharging, and needs battery is overcharged protection.Subsequently, the first control module
204 carry out short circuit set of cells by controlling the first switch module 203 conducting, so that current insurance silk F1 melts
Disconnected, and then make set of cells open circuit, thus realize set of cells is overcharged protection.
The most such as, under battery is in discharge mode, the battery collected when the first control module 204
When voltage is less than lower limit (that is, second voltage threshold) of first voltage range, (or the capacity of battery is low
Lower limit (that is, the second capacity threshold) in the first range of capacity), then the first control module 204 can be true
Fixed now battery was in the state of putting, and needed battery is carried out Cross prevention.Subsequently, the first control module
204 carry out short circuit set of cells by controlling the first switch module 203 conducting, so that current insurance silk F1 melts
Disconnected, and then make set of cells open circuit, thus realize the Cross prevention to set of cells.
The most such as, differ greatly between the voltage of each batteries collected when the first control module 204 (example
As, the threshold pressure differential more than presetting) time, the first control module 204 may determine that now in set of cells
Between each batteries unbalanced, need battery is carried out balance protection.Subsequently, the first control module 204
Short circuit set of cells is carried out by controlling the first switch module 203 conducting, so that current insurance silk F1 fusing,
And then make set of cells open circuit, thus realize the balance protection to set of cells.
And (that is, detected battery status information is unsatisfactory for battery protection and touches when normal battery operation
During clockwork spring part), the first control module 204 can control the first switch module 203 and remain off,
So, the first switch module 203 does not interferes with the work of set of cells.
In sum, gathered the battery status information of battery by the first control module, and at battery status
When information meets default battery protection trigger condition, control the first switch module conducting, the first switches set
The conducting of part makes set of cells be shorted.Owing to set of cells is shorted, the transient current in circuit is caused to be dashed forward
Increase, so that blown fuse, and then make set of cells open circuit, thus realize the protection to set of cells.
In the battery protecting apparatus that this utility model provides, use the electric fuse of function singleness can realize electricity
The protection quickly and efficiently of pond group, and without arranging baroque three end electric fuses, therefore, in reality
While now set of cells being carried out omnibearing protection, simplify circuit design, reduce cost, simply
Reliably, it is easy to implement, it is adaptable to require in the digital product of structure simplification, dependable performance.
In an embodiment of the present utility model, the electric fuse employed in battery protecting apparatus 20
Can be with all current insurance silks, i.e. M electric fuse can include M current insurance silk.Such as,
Fig. 2 A shows the example that current protective device 20 includes a current insurance silk F1, and Fig. 2 B shows
Go out the example that current protective device 20 includes two current insurance silk F1 and F2.So, electricity is worked as
The fusing of current insurance silk is may result in when electric current in road is excessive, so that set of cells open circuit, it is achieved to battery
The protection of group.Further, the product cost of current insurance silk is low, therefore, it can farthest reduce electricity
The cost of pond protection device 20.
Or, in another embodiment, the electric fuse employed in battery protecting apparatus 20 is permissible
All Thermal Cutoffs, i.e. M electric fuse can include M Thermal Cutoffs.Such as, figure
2C shows the example that current protective device 20 includes a Thermal Cutoffs F3.
In the related, if it is desired to realize the temperature protection to set of cells, it will usually go here and there at battery
Connection temperature switch TCO, when battery temperature raises, the temperature switch TCO being close to battery can sense
Temperature, when this temperature reaches the triggering temperature of temperature switch TCO, temperature switch TCO starts,
By set of cells open circuit, it is achieved temperature protection.But, only cannot be realized electricity by temperature switch TCO
The overcurrent protection of pond group, if it is desired to carry out overcurrent protection, still needs to arrange in circuit respective element, this
Sample one, causes cost to increase, and can increase space hold, causes circuit structure complicated.
But in this embodiment of the present utility model, owing to using Thermal Cutoffs, on the one hand,
Can electric current in circuit excessive time fusing so that set of cells open circuit, it is achieved set of cells to be crossed stream
Protection.On the other hand, Thermal Cutoffs can monitor the temperature of battery in real time, when the temperature of battery is excessive
Time (such as, reach to trigger the temperature threshold of Thermal Cutoffs fusing), this Thermal Cutoffs is same
Can fuse, so that set of cells open circuit, it is achieved the temperature protection to set of cells.That is, Temperature protection is used
Silk can realize the overcurrent protection to set of cells and temperature protection simultaneously, real compared to using different elements
Existing both functions, this kind of embodiment can simplify circuit design, reduces circuit complexity, reduces electricity
Road cost and space hold.
Again or, in further embodiment, the electric fuse employed in battery protecting apparatus 20 can
To include both current insurance silk and Thermal Cutoffs, i.e. described M electric fuse includes M1 electricity
Stream electric fuse and M2 Thermal Cutoffs, wherein, M1+M2=M.Such as, Fig. 2 D shows electricity
Stream protection device 20 includes a current insurance silk F1 and the example of a Thermal Cutoffs F3.?
This embodiment, current insurance silk and Thermal Cutoffs can simultaneously work as the effect of overcurrent protection, temperature
Electric fuse may also operate as the effect of temperature protection.
Under normal circumstances, Thermal Cutoffs is connected with this battery near battery, and alternatively, a joint
Battery can a corresponding Thermal Cutoffs, as such, it is possible to the temperature conditions of the every batteries of overall monitor,
And wherein the temperature of a batteries is excessive may result in the fusing of corresponding Thermal Cutoffs, thus
Make whole set of cells be in off state, thus can improve the promptness of the temperature protection to set of cells
And effectiveness.
It is to say, in this optional embodiment, the M employed in battery protecting apparatus 20
Electric fuse can include M3 Thermal Cutoffs, wherein, M3=N, and M3 Thermal Cutoffs
Connect with N batteries alternative expression.In this utility model, so-called alternative expression series connection refers at the sense of current
On, according to a Thermal Cutoffs, another batteries order successively by M3 Thermal Cutoffs and N
Batteries is together in series.Fig. 2 E shows that current protective device 20 includes three Thermal Cutoffs, point
It not the example of Thermal Cutoffs F3, F4 and F5, and, in the embodiment shown in Fig. 2 E,
Set of cells includes three batteries, is battery B1, B2 and B3 respectively.It can be seen that three from Fig. 2 E
Connect for alternative expression between individual Thermal Cutoffs and three batteries.
By this embodiment, it is possible not only to realize the overall monitor of the temperature conditions to every batteries,
It is also possible that Thermal Cutoffs and battery in close proximity to, such that it is able to improve the accuracy of temperature detection,
And then improve promptness and the reliability of the temperature protection to set of cells.
In an embodiment of the present utility model, battery protecting apparatus can be protection circuit plate (example
Such as, PCBA (Printed Circuit Board Assembly, printed circuit-board assembly) plate) form.
In this case, at least the first switch module 203 and the first control module 204 can be integrated in guarantor
On protection circuit plate.As for M electric fuse, it can all be integrated on protection circuit plate, such as,
As shown in Figure 2 A, current insurance silk F1 is with the first switch module 203 and the first control module 204
It is integrated in together on protection circuit plate 205.Again or, M electric fuse can all be not integrated into
On protection circuit plate, and it is separated with protection circuit plate, such as, as shown in Figure 2 C, Thermal Cutoffs
F3 can connect with battery in the position of adjacent cells, and and is not integrated into protection circuit plate 205
On.Or, the part in M electric fuse is integrated on protection circuit plate, remainder and guarantor
Protection circuit plate is separated, and such as, as shown in Figure 2 B, current insurance silk F1 is with the first switch module 203
And first control module 204 be integrated in together on protection circuit plate 205, and current insurance silk F2
It is not integrated on protection circuit plate 205；The most such as, as shown in Fig. 2 D and Fig. 2 E, current insurance
Silk is integrated in protection circuit plate 205 together with the first switch module 203 and the first control module 204
On, and Thermal Cutoffs is connected with battery in the position of adjacent cells, and it is not integrated into protection circuit
On plate 205.
In preferred implementation of the present utility model, M1 current insurance silk in M electric fuse can
To be integrated on protection circuit plate 205, and M2 Thermal Cutoffs can be with protection circuit plate 205
It is separated, so can take into account the overall simple structure of current protective device and the Gao Zhun of temperature detection
Really property.
As it has been described above, the first control module 204 can detect the battery status information of connected battery,
And judge whether this battery status information meets the battery protection trigger condition preset, determining this battery shape
When state information meets battery protection trigger condition, control the first switch module 203 and turn on, so that set of cells
Short circuit.In an embodiment of the present utility model, as it is shown on figure 3, the first control module 204 can
To include the first control chip 206, wherein, this first control chip 206 can include the first control end
Sub-CO1 and first input end the most N number of with N batteries, such as, shown in Fig. 3
In example, including with three batteries three first input end, respectively first input end one to one
The sub-I12 of sub-I11, first input end and the sub-I13 of first input end, wherein, each first input end is used
In the positive pole connecting corresponding battery.Such as, the sub-I11 of first input end is corresponding with battery B1,
Connect the positive pole of this battery B1.The sub-I12 of first input end is corresponding with battery B2, connects this battery
The positive pole of B2.The sub-I13 of first input end is corresponding with battery B3, connects the positive pole of this battery B3.
Additionally, the controlled terminal 203a of the first control terminal CO1 and the first switch module 203 connects, first
Control chip 206 may be used for gathering the battery status letter of each batteries via N number of first input end
Breath, and judge whether this battery status information meets the battery protection trigger condition preset, determining this electricity
When pond status information meets battery protection trigger condition, via the first control terminal CO1 to the first switch
Assembly 203 sends the first control signal, and this first control signal may be used for controlling the first switch module
203 conductings.
Alternatively, as it is shown on figure 3, each first input end of the first control chip 206 can be via
One resistance is connected with the positive pole of each self-corresponding battery, such as, and resistance R1, the R2 shown in Fig. 3
And R3, and illustratively, R1=R2=R3=1K Ω.Additionally, the sub-I11 of first input end and first defeated
Enter and can be connected by electric capacity C1 between terminal I12, the sub-I12 of first input end and first input end
Can be connected by electric capacity C2 between I13, the sub-I3 of first input end can be via electric capacity C3 and set of cells
Negative pole (or ground) connect, and illustratively, C1=C2=C3=0.1 μ F.Additionally, as it is shown on figure 3,
First control chip 206 can also include the first power supply terminal VDD1, this first power supply terminal VDD1
Can be connected with the positive pole of set of cells, to obtain electric from set of cells and normally to work.Alternatively, the first power supply
Can be connected by resistance R4 between terminal VDD1 and the positive pole of set of cells, and illustratively,
R4=100 Ω.Additionally, can be by electricity between the first power supply terminal VDD1 and the sub-I11 of first input end
Hold C4 to connect, and illustratively, C4=0.1 μ F.Additionally, as it is shown on figure 3, the first control chip 206
The first ground terminal VSS1 can also be included, this first ground terminal VSS1 connect set of cells negative pole (or
Ground).
Use special control chip as the first control module, the most easy to operate, and be readily produced,
Reduce the workload of technical staff.
When actually used, according to different battery requirements, corresponding battery protection trigger condition may
Different.Such as, for overcharging protection, for different batteries, its corresponding voltage threshold can
Can be different, if using special control chip, possibly cannot realize overcharging guarantor for different batteries
The demand of protecting is customized.Once cannot find applicable control chip, then possibly cannot meet the mistake of battery
Fill protection demand.Therefore, in another embodiment of the present utility model, as shown in Figure 4, first
Control module 204 can include voltage collection circuit 207 and voltage comparator circuit 208, wherein, voltage
Acquisition Circuit 207 can include the first lead-out terminal O1 and the most N number of with N batteries second
Input terminal, such as, in the example depicted in fig. 4, the first control module 204 include three second defeated
Enter terminal, respectively second input terminal I21, I22 and I23.Wherein, each second input terminal is used
In connecting the positive pole of corresponding battery, such as, as shown in Figure 4, the second input terminal I21 and battery
B1 is corresponding, connects the positive pole of battery B1, and the second input terminal I22 is corresponding with battery B2, even
Connecing the positive pole of battery B2, the second input terminal I23 is corresponding with battery B3, is just connecting battery B3
Pole.Voltage collection circuit 207 may be used for gathering the voltage of each batteries via N number of second input terminal,
And by the first lead-out terminal O1 output voltage signal；Voltage comparator circuit 208 includes the 3rd input
Sub-I31 and the second lead-out terminal O2, wherein, the 3rd input terminal I31 and the first lead-out terminal O1 is even
Connecing, the controlled terminal 203a of the second lead-out terminal O2 and the first switch module 203 connects, and voltage ratio is relatively
Circuit 208 is for the voltage signal that will receive via the 3rd input terminal I31 and the voltage range preset
Compare, and when voltage signal is beyond voltage range, open to first via the second lead-out terminal O2
Closing assembly 203 and send the second control signal, this second control signal is for controlling the first switch module 203
Conducting.Wherein, voltage comparator circuit 208 can be in the battery that voltage collection circuit 207 is connected
When the voltage of the battery of predetermined quantity is beyond voltage range, via the second lead-out terminal O2 to the first switch
Assembly 203 sends the second control signal, and this predetermined quantity can be 1, or is voltage collection circuit 207
The total L of the battery connected, or be any value between 1 to L.
When set of cells is protected, it is primarily directed to overcharge and cross put both of these case, and for mistake
Fill and cross and put both of these case, this battery status information of voltage of battery can be used to judge.Work as electricity
The voltage of the battery of the predetermined quantity in the battery that pressure Acquisition Circuit 207 is connected is higher than the voltage model preset
During the higher limit enclosed, now battery is in the state of overcharging, and voltage comparator circuit 208 can be to the first switch
Assembly 203 sends the second control signal, turns on controlling the first switch module 203, thus to set of cells
Carry out overcharging protection.Electricity when the battery of the predetermined quantity in the battery that voltage collection circuit 207 is connected
Forcing down when the lower limit of default voltage range, now battery was in the state of putting, voltage comparator circuit
208 can send the second control signal to the first switch module 203, to control the first switch module 203
Conducting, thus set of cells is carried out Cross prevention.(that is, the place when the voltage of battery is in normal level
Time in this voltage range preset), voltage comparator circuit 208 can control the first switch module 203
Remain open.
By the way, technical staff can be according to the protection demand of battery reality, the corresponding electricity of design
Pressure Acquisition Circuit and voltage comparator circuit, thus meet the protection demand of different battery, it is achieved battery protection
Customization and more flexible circuit design.
In this utility model, the first switch module 203 can be formed as the switching device of any form.
Illustratively, as shown in Fig. 2 A to Fig. 4, the first switch module 203 can include metal-oxide-semiconductor, wherein,
The grid of this metal-oxide-semiconductor is connected with controlled terminal 203a, and the source electrode of metal-oxide-semiconductor and the second terminal 203c are even
Connecing, the drain electrode of metal-oxide-semiconductor is connected with the first terminal 203b.So, preset when battery status information meets
Battery protection trigger condition time, the first control module 204 can export high level signal, so that MOS
The state that pipe is on, thus short circuit set of cells, to protect set of cells.And work as battery status
When information is normal (that is, being unsatisfactory for battery protection trigger condition), the first control module 204 can be defeated
Go out low level signal, so that metal-oxide-semiconductor is in the state of disconnection, now, do not affect the work of set of cells.
Optionally, in addition, as shown in Fig. 2 A to Fig. 4, the first switch module 203 can also include two
Pole is managed, and the positive pole of this diode connects the source electrode of metal-oxide-semiconductor, and the negative pole of this diode connects metal-oxide-semiconductor
Drain electrode.
Fig. 5 shows the electricity of the battery protecting apparatus 20 according to another embodiment of the present utility model
Lu Tu.As it is shown in figure 5, this battery protecting apparatus 20 can also include: second switch assembly 209 He
3rd switch module 210, wherein, second switch assembly 209 is connected on positive output terminal 201 and first
Between the first terminal 203b of switch module 203, the 3rd switch module 210 is connected on positive output terminal
201 and first switch module 203 the first terminal 203b between, and connect with second switch assembly 209.
Additionally, this battery protecting apparatus 20 can also include: the second control module 211, with second switch assembly
209 connect, and are connected with the 3rd switch module 210, and this second control module 211 may be used for connecting
At least one batteries in set of cells, the battery status information of the battery that detection is connected, and judge battery
Whether status information meets default overcharging is protected trigger condition and Cross prevention trigger condition, is determining electricity
Pond status information meets when overcharging protection trigger condition, controls second switch assembly 209 and disconnects, so that electric
Pond group open circuit, and when determining that battery status information meets Cross prevention trigger condition, control the 3rd and open
Close assembly 210 to disconnect, so that set of cells open circuit.
In this utility model, overcharge protection trigger condition and can include at least one in following condition:
The voltage of the battery of the predetermined quantity in the battery connected, higher than the tertiary voltage threshold value preset, is connected
Battery in predetermined quantity battery capacity higher than preset the 3rd capacity threshold.Alternatively, the 3rd
Voltage threshold can be less than the first voltage threshold and more than the second voltage threshold, and the 3rd capacity threshold can be little
In the first capacity threshold and more than the second capacity threshold.It addition, Cross prevention trigger condition can include with
At least one in lower condition: the voltage of the battery of the predetermined quantity in the battery connected is less than default
4th voltage threshold, the capacity of the battery of the predetermined quantity in the battery connected is less than the 4th appearance preset
Amount threshold value.Alternatively, the 4th voltage threshold can be more than the second voltage threshold, and less than tertiary voltage threshold
Value, the 4th capacity threshold can be more than the second capacity threshold, and less than the 3rd capacity threshold.
So, by the second control module 211, second switch assembly 209 and the 3rd switch module 210,
Can realize once overcharging of set of cells is protected and a Cross prevention.When circuit occurs extremely causing one
Secondary protection cannot be worked, and (such as, the voltage of battery the most persistently raises or the voltage of battery still continues
Decline) time, by the first control module 204 and the first switch module 203, still can realize battery
Second protection (including that secondary overcharges protection, secondary Cross prevention etc.).Thus, it is possible to realize electricity
The duplicate protection of pond group.
Additionally, as it is shown in figure 5, work as under charge mode, the 3rd switch module 210 is in the conduction state,
If battery status information is in normal level (that is, not met overcharge protection trigger condition), then second
Control module 211 can control second switch assembly 209 and be held on, thus, it is ensured that charges continues
Carry out.Once need to carry out overcharging protection, then the second control module 211 can control second switch assembly
209 disconnect, so that set of cells open circuit, thus realize overcharging protection.Under at discharge mode, second opens
Close assembly 209 in the conduction state, if battery status information is in normal level (that is, not met mistake
Put protection trigger condition), then the second control module 211 can control the 3rd switch module 210 keep lead
It is logical, thus, it is ensured that discharges is persistently carried out.Once need to carry out Cross prevention, then the second control module
211 can control the 3rd switch module 210 disconnects, so that set of cells open circuit, thus realize Cross prevention.
It addition, in another embodiment of the present utility model, as it is shown in figure 5, the second control module 211
Can also be connected with the controlled terminal 203a of the first switch module 203, for full at battery status information
During foot battery protection trigger condition, control the first switch module 203 and turn on, so that set of cells short circuit.Also
That is, when the second control module 211 controls second switch assembly 209 or the 3rd switch module 210 enters
After row once protection, still can judge whether to need to carry out two according to the battery status information real-time monitored
Secondary protection, and if it is determined that need, then control the first switch module 203 and turn on, so that set of cells is short
Connect.Meanwhile, the first control module 204 monitors battery status information, and once this electricity the most in real time
Pond status information meets battery protection trigger condition, then control the first switch module 203 and turn on, so that electric
Pond group short circuit.Turn on as long as one of them control module controls the first switch module 203, this first switch
Assembly 203 is that is switched on, and set of cells is i.e. shorted, thus realizes second protection.
In an example embodiment, as shown in Figure 6, the second control module 211 can include second
Control chip 212, this second control chip 212 can include the second control terminal CO2, the 3rd control
Terminal CO3 and four-input terminal the most N number of with N batteries, such as, shown in Fig. 6
Example in, set of cells includes three batteries, is battery B1, B2 and B3 respectively, so, second control
Coremaking sheet 212 can include three four-input terminal, is four-input terminal I41, I42 and I43 respectively,
Wherein, each four-input terminal is for connecting the positive pole of corresponding battery, such as, four-input terminal
Sub-I41 is corresponding with battery B1, connects the positive pole of this battery B1, the sub-I42 of four-input terminal and battery
B2 is corresponding, connects the positive pole of this battery B2, and the sub-I43 of four-input terminal is corresponding with battery B3,
Connect the positive pole of this battery B3.It addition, the second control terminal CO2 can be with second switch assembly 209
Connecting, the 3rd control terminal CO3 can be connected with the 3rd switch module 210, the second control chip 211
May be used for gathering via N number of four-input terminal the battery status information of each batteries, and judge battery
Whether status information meets default overcharging is protected trigger condition and Cross prevention trigger condition, is determining electricity
Pond status information meet overcharge protection trigger condition time, via the second control terminal CO2 to second switch
Assembly 209 sends the 3rd control signal, disconnects controlling second switch assembly 209, and is determining electricity
When pond status information meets Cross prevention trigger condition, via the 3rd control terminal CO3 to the 3rd switch
Assembly 210 sends the 4th control signal, disconnects controlling the 3rd switch module 210.
Alternatively, as shown in Figure 6, each four-input terminal of the second control chip 212 can be via
One resistance is connected with the positive pole of each self-corresponding battery, such as, and resistance R5, the R6 shown in Fig. 6
And R7, and illustratively, R5=R6=R7=100 Ω.Additionally, the sub-I41 of four-input terminal and the 4th defeated
Enter and can be connected by electric capacity C5 between terminal I42, the sub-I42 of four-input terminal and four-input terminal
Can be connected by electric capacity C6 between I43, the sub-I43 of four-input terminal can be via electric capacity C7 and battery
The negative pole (or ground) of group connects, and illustratively, C5=C6=C7=0.1 μ F.Additionally, such as Fig. 6 institute
Showing, the second control chip 212 can also include second source terminal VDD2, this second source terminal
VDD2 can be connected by I41 with four-input terminal, to obtain electric work from set of cells.Additionally, such as Fig. 6
Shown in, the second control chip 212 can also include the second ground terminal VSS2, this second ground terminal
VSS2 connects the negative pole (or ground) of set of cells.
Alternatively, as shown in Figure 6, the second control chip 212 can also include the 4th control terminal CO4,
4th control terminal CO4 can be connected with the controlled terminal 203a of the first switch module 203, and second
Control chip 212 can be also used for when battery status information meets battery protection trigger condition, via
Four control terminal CO4 send the 5th control signal, the 5th control signal to the first switch module 203
Turn on for controlling the first switch module 203, so that set of cells short circuit.
This utility model also provides for a kind of power supply module, and this power supply module may include that set of cells, including
The N batteries being cascaded, wherein, N >=1；And battery protecting apparatus, this battery protection fills
The battery protecting apparatus provided according to this utility model is provided.
In sum, gathered the battery status information of battery by the first control module, and at battery status
When information meets default battery protection trigger condition, control the first switch module conducting, the first switches set
The conducting of part makes set of cells be shorted.Owing to set of cells is shorted, the transient current in circuit is caused to be dashed forward
Increase, so that blown fuse, and then make set of cells open circuit, thus realize the protection to set of cells.
In the battery protecting apparatus that this utility model provides, use the electric fuse of function singleness can realize electricity
The protection quickly and efficiently of pond group, and without arranging baroque three end electric fuses, therefore, in reality
While now set of cells being carried out omnibearing protection, simplify circuit design, reduce cost, simply
Reliably, it is easy to implement, it is adaptable to require in the digital product of structure simplification, dependable performance.
Preferred implementation of the present utility model is described in detail above in association with accompanying drawing, but, this practicality is new
Type is not limited to the detail in above-mentioned embodiment, in technology concept of the present utility model,
The technical solution of the utility model can be carried out multiple simple variant, these simple variant belong to this reality
With novel protection domain.
It is further to note that each the concrete technology described in above-mentioned detailed description of the invention is special
Levy, in the case of reconcilable, can be combined by any suitable means.In order to avoid need not
The repetition wanted, various possible compound modes are illustrated by this utility model the most separately.
Additionally, combination in any can also be carried out between various different embodiment of the present utility model, only
Wanting it without prejudice to thought of the present utility model, it should be considered as content disclosed in the utility model equally.
Claims (12)
1. a battery protecting apparatus, for protecting set of cells, described set of cells includes series connection
N batteries together, wherein, N >=1, it is characterised in that described device includes:
Positive output terminal and negative output terminal, be used for accessing external equipment, and described positive output terminal is additionally operable to
Connecting the positive pole of described set of cells, described negative output terminal is additionally operable to connect the negative pole of described set of cells；
M electric fuse, for connecting with described N batteries, wherein, M >=1；
First switch module, including controlled terminal, the first terminal and the second terminal, wherein, described first
Between the positive pole of terminal and described set of cells via at least one electric fuse in described M electric fuse even
Connecing, described second terminal is connected with the negative pole of described set of cells；
First control module, is connected with the described controlled terminal of described first switch module, is used for connecting institute
State at least one batteries in set of cells, the battery status information of the battery that detection is connected, and judge institute
State whether battery status information meets the battery protection trigger condition preset, determining that described battery status is believed
When breath meets described battery protection trigger condition, control described first switch module conducting, so that described electricity
Pond group short circuit.
Device the most according to claim 1, it is characterised in that described M electric fuse includes M
Individual current insurance silk or M Thermal Cutoffs；Or
Described M electric fuse includes M1 current insurance silk and M2 Thermal Cutoffs, wherein,
M1+M2=M.
Device the most according to claim 1, it is characterised in that described M electric fuse includes
M3 Thermal Cutoffs, wherein, M3=N, and described M3 Thermal Cutoffs and described N save
Battery alternative expression is connected.
Device the most according to claim 1, it is characterised in that described first control module includes
First control chip, described first control chip includes the first control terminal and with described N batteries one by one
Corresponding N number of first input end, wherein, each described first input end is corresponding for connecting
The positive pole of battery, described first control terminal is connected with the described controlled terminal of described first switch module,
Described first control chip for gathering the battery shape of each batteries via described N number of first input end
State information, and judge whether described battery status information meets the battery protection trigger condition preset, really
When fixed described battery status information meets described battery protection trigger condition, via described first control terminal
Sending the first control signal to described first switch module, described first control signal is used for controlling described
One switch module conducting.
Device the most according to claim 1, it is characterised in that described battery status information includes
The voltage of battery；And, described first control module includes voltage collection circuit and voltage comparator circuit,
Wherein:
Described voltage collection circuit include the first lead-out terminal and with described N batteries N one to one
Individual second input terminal, wherein, each described second input terminal is for just connecting corresponding battery
Pole, described voltage collection circuit for gathering the electricity of each batteries via described N number of second input terminal
Pressure, and by described first lead-out terminal output voltage signal；
Described voltage comparator circuit includes the 3rd input terminal and the second lead-out terminal, wherein, the described 3rd
Input terminal is connected with described first lead-out terminal, described second lead-out terminal and described first switch module
Described controlled terminal connect, described voltage comparator circuit for will via described 3rd input terminal receive
To voltage signal compare with the voltage range preset, and at described voltage signal beyond described voltage
During scope, send the second control signal, institute via described second lead-out terminal to described first switch module
State the second control signal for controlling described first switch module conducting.
Device the most according to claim 1, it is characterised in that described first switch module includes
Metal-oxide-semiconductor, wherein, the grid of described metal-oxide-semiconductor is connected with described controlled terminal, described metal-oxide-semiconductor
Source electrode is connected with described second terminal, and the drain electrode of described metal-oxide-semiconductor is connected with described the first terminal.
Device the most according to claim 1, it is characterised in that the often economize on electricity in described set of cells
Pond is lithium ion battery.
8. according to the device according to any one of claim 1-7, it is characterised in that described device is also
Including:
Second switch assembly, is connected on described the first of described positive output terminal and described first switch module
Between terminal；
3rd switch module, is connected on described the first of described positive output terminal and described first switch module
Between terminal, and connect with described second switch assembly；
Second control module, is connected with described second switch assembly, and is connected with described 3rd switch module,
Described second control module, for connecting at least one batteries in described set of cells, detects the electricity connected
The battery status information in pond, and judge whether described battery status information meets the protection that overcharges preset and trigger
Condition and Cross prevention trigger condition, determining that described battery status information overcharges protection triggering described in meeting
During condition, control described second switch assembly and disconnect, so that described set of cells open circuit, and determining
State battery status information when meeting described Cross prevention trigger condition, control described 3rd switch module and break
Open, so that described set of cells open circuit.
Device the most according to claim 8, it is characterised in that described second control module also with
The described controlled terminal of described first switch module connects, described for meeting at described battery status information
During battery protection trigger condition, control described first switch module conducting, so that described set of cells short circuit.
Device the most according to claim 8, it is characterised in that described second control module includes
Second control chip, described second control chip include the second control terminal, the 3rd control terminal and with institute
State N batteries the most N number of four-input terminal, wherein, each described four-input terminal
For connecting the positive pole of corresponding battery, described second control terminal is with described second switch assembly even
Connecing, described 3rd control terminal is connected with described 3rd switch module, and described second control chip is used for warp
Gathered the battery status information of each batteries by described N number of four-input terminal, and judge described battery shape
Whether state information meets default overcharging is protected trigger condition and Cross prevention trigger condition, described determining
When overcharging protection trigger condition described in battery status information is satisfied, via described second control terminal to described
Second switch assembly sends the 3rd control signal, and described 3rd control signal is used for controlling described second switch
Assembly disconnects, and when determining that described battery status information meets described Cross prevention trigger condition, warp
Being sent the 4th control signal by described 3rd control terminal to described 3rd switch module, the described 4th controls
Signal is used for controlling described 3rd switch module and disconnects.
11. devices according to claim 10, it is characterised in that described second control chip is also
Including the 4th control terminal, the 4th control terminal connects with the described controlled terminal of described first switch module
Connecing, described second control chip is additionally operable to meet described battery protection at described battery status information and triggers bar
During part, send the 5th control signal via described 4th control terminal to described first switch module, described
5th control signal is used for controlling described first switch module conducting, so that described set of cells short circuit.
12. 1 kinds of power supply modules, it is characterised in that including:
Set of cells, including the N batteries being cascaded, wherein, N >=1；And
Battery protecting apparatus, this battery protecting apparatus is according to according to any one of claim 1-11
Battery protecting apparatus.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620154710.4U CN205489484U (en) | 2016-02-29 | 2016-02-29 | Protection of secondary battery and power supply module |
| PCT/CN2016/097966 WO2017148123A1 (en) | 2016-02-29 | 2016-09-02 | Battery protecting device and power assembly |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620154710.4U CN205489484U (en) | 2016-02-29 | 2016-02-29 | Protection of secondary battery and power supply module |
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| Publication Number | Publication Date |
|---|---|
| CN205489484U true CN205489484U (en) | 2016-08-17 |
Family
ID=56658838
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620154710.4U Active CN205489484U (en) | 2016-02-29 | 2016-02-29 | Protection of secondary battery and power supply module |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106532652A (en) * | 2016-12-13 | 2017-03-22 | 珠海格力电器股份有限公司 | Protection device and battery protection circuit |
| CN107134757A (en) * | 2016-02-29 | 2017-09-05 | 比亚迪股份有限公司 | Battery protecting apparatus and power supply module |
| WO2017148124A1 (en) * | 2016-02-29 | 2017-09-08 | 比亚迪股份有限公司 | Battery protecting device and power assembly |
| WO2017148123A1 (en) * | 2016-02-29 | 2017-09-08 | 比亚迪股份有限公司 | Battery protecting device and power assembly |
| WO2020109134A1 (en) * | 2018-11-28 | 2020-06-04 | Robert Bosch Gmbh | Disconnection device for an electrochemical energy storage system |
-
2016
- 2016-02-29 CN CN201620154710.4U patent/CN205489484U/en active Active
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107134757A (en) * | 2016-02-29 | 2017-09-05 | 比亚迪股份有限公司 | Battery protecting apparatus and power supply module |
| WO2017148124A1 (en) * | 2016-02-29 | 2017-09-08 | 比亚迪股份有限公司 | Battery protecting device and power assembly |
| WO2017148123A1 (en) * | 2016-02-29 | 2017-09-08 | 比亚迪股份有限公司 | Battery protecting device and power assembly |
| CN106532652A (en) * | 2016-12-13 | 2017-03-22 | 珠海格力电器股份有限公司 | Protection device and battery protection circuit |
| WO2020109134A1 (en) * | 2018-11-28 | 2020-06-04 | Robert Bosch Gmbh | Disconnection device for an electrochemical energy storage system |
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