CN202059161U - Lithium battery pack protecting device with switch - Google Patents
Lithium battery pack protecting device with switch Download PDFInfo
- Publication number
- CN202059161U CN202059161U CN2011201115381U CN201120111538U CN202059161U CN 202059161 U CN202059161 U CN 202059161U CN 2011201115381 U CN2011201115381 U CN 2011201115381U CN 201120111538 U CN201120111538 U CN 201120111538U CN 202059161 U CN202059161 U CN 202059161U
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- China
- Prior art keywords
- circuit
- switch
- lithium battery
- protective device
- battery group
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- 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.)
- Expired - Lifetime
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Abstract
The utility model provides a lithium battery pack protecting device with a switch, comprising an electrical core pack, a protecting board, a hardware switch; the electrical core pack is in connection with the protecting board; the hardware switch is in connection with the protecting board. The beneficial effects of the utility model are that: the protecting board is provided with the hardware switch in such a way that in case of fault failure of a main control board of an electric car, the hardware switch can directly cut off power supply to the electrical core for emergency power off and parking, which can substantially raise the reliability of the lithium battery pack.
Description
Technical field
The utility model relates to battery protecting apparatus, relates in particular to the lithium battery group protective device of belt switch.
Background technology
The lithium battery group is made up of electric core group and baffle two parts; baffle has pure hardware and two kinds of the software plates of being with the MCU management; because of the pure hardware protection plate of its reliability occupies most markets; the general hardware baffle only provides the management to electric core overvoltage, under-voltage, overcurrent, short circuit and balance, but the existing product dependability is not high.
Lithium battery string baffle does not have the hardware protection switch at lithium cell in the market, not controlled by master control borad at electric bicycle master control borad fault motor current supply circuit, if power supply is straight-through, motor is switched on always, and electric motor car just cannot stop; In pure hardware protection plate circuit, overcurrent or short circuit take place, and switch power supply MOS burns out high-power MOS tube repeatedly.
The hardware protection plate is made up of several sections such as charging input, discharge output, overcurrent/short circuit, equalizing circuits substantially; the protection IC that wherein monitors electric core voltage can be single electric core protection IC; also can be how electric core protection IC; when one or more electric core voltage reaches over-charge protective voltage; corresponding protection IC action; by the charging metal-oxide-semiconductor in the combinational circuit cut-out current supply circuit; put protection during voltage when one or more electric core voltage drops to be, cut off discharge metal-oxide-semiconductor in the current supply circuit by combinational circuit.When overcurrent or short circuit took place, the MOS that discharges in the major loop was cut off in overcurrent protection IC action control, and when one or more road electricity core voltage was raised to protection IC operation voltage, corresponding metal-oxide-semiconductor was opened in its output control, and electric core is by the discharge of balance discharge resistance.
The utility model content
In order to solve the not high problem of lithium battery group dependability in the prior art, the utility model provides a kind of lithium battery group protective device of belt switch.
The utility model provides a kind of lithium battery group protective device of belt switch, comprises electric core group, baffle, hardware switch, and described electric core group links to each other with described baffle, and described hardware switch links to each other with described baffle.
As further improvement of the utility model, this lithium battery group protective device also comprises lock cell, and described lock cell links to each other with described hardware switch with described baffle respectively.
As further improvement of the utility model; this lithium battery group protective device comprises that also step-down adjusts circuit, LDO voltage stabilizing circuit, crosses and put protection with over current protecting self-locking circuit, charge and discharge MOS switch major loop, switch outage and cross and put and cross current circuit; described electric core group is adjusted circuit with described step-down and is linked to each other, described step-down adjust circuit respectively with described LDO voltage stabilizing circuit, described mistake put protection with over current protecting self-locking circuit, described charge and discharge MOS switch major loop, the outage of described switch and cross put with current circuit link to each other.
The beneficial effects of the utility model are: by partly increasing hardware switch at baffle; under the situation of electric motor car master control borad malfunction and failure; directly cut off electric core power supply by hardware switch, be used for emergency power off and parking, make the reliability of this lithium battery group improve greatly.
Description of drawings
Fig. 1 is a theory diagram of the present utility model.
Fig. 2 is the theory diagram of an embodiment of the present utility model.
Fig. 3 is that circuit is adjusted in step-down of the present utility model.
Fig. 4 is a LDO voltage stabilizing circuit of the present utility model.
Fig. 5 is that mistake of the present utility model is put protection and over current protecting self-locking circuit.
Fig. 6 is a charge and discharge MOS switch major loop of the present utility model.
Fig. 7 is switch outage of the present utility model and puts and cross current circuit excessively.
Embodiment
As shown in Figure 1; the utility model discloses a kind of lithium battery group protective device of belt switch; comprise electric core group 100, baffle 200, hardware switch 300, described electric core group 100 links to each other with described baffle 200, and described hardware switch 300 links to each other with described baffle 200.
As an embodiment of the present utility model, this lithium battery group protective device also comprises lock cell 400, and described lock cell 400 links to each other with described hardware switch 300 with described baffle 200 respectively.After the protection action that produces when overcurrent or short circuit takes place, this action is pinned,, power on again and can remove until the load of breaking by lock cell 400.
As shown in Figure 2; as another embodiment of the present utility model; this lithium battery group protective device also comprises step-down adjustment circuit 500; LDO voltage stabilizing circuit 600; cross and put protection and over current protecting self-locking circuit 700; charge and discharge MOS switch major loop 800; switch cuts off the power supply and crosses and puts and cross current circuit 900; described electric core group 100 is adjusted circuit 500 with described step-down and is linked to each other, described step-down adjustment circuit 500 respectively with described LDO voltage stabilizing circuit 600; described mistake is put protection and over current protecting self-locking circuit 700; described charge and discharge MOS switch major loop 800; described switch cuts off the power supply and puts excessively with mistake current circuit 900 and links to each other.
For realize that baffle electricity core power supply turn-offs firmly, overcurrent/short circuit self-locking, electric core no-voltage close charge function, mainly increased NAND gate Digital Logic control circuit; For solving Digital Logical Circuits and current foldback circuit powerup issue, some discrete component combinational circuits of step-down adjustment circuit 500, LDO voltage stabilizing circuit 600 and some cooperation logic realization have been increased.
This reality is novel to be example with the series connection of 10 crosstalk cores; the highest 42V(P+ of 10 crosstalk cores series connection) voltage is through hardware protection circuit; pass through D12 then; ZD5; Q29, Q30, R83; the step-down that R84 forms is adjusted circuit 500 and is obtained the following voltage VCC of 12V, VCC output give respectively LDO voltage stabilizing circuit 600, described mistake put protection and over current protecting self-locking circuit 700, described charge and discharge MOS switch major loop 800, the outage of described switch and put and cross current circuit 900 and power.
As shown in Figure 4, VCC obtains 4.2V left and right sides voltage through the D5 isolated buck again through U2 (LDO) voltage stabilizing output 4.4V, offers current foldback circuit again, flows through protective circuit by C17, C18, R72 and U21 combination.The PIN1 output low level of U21 when circuit overcurrent/short circuit (normally be high), Q31 turn-offs, and network PWR_SW uprises level, and PWR_SW cuts off control usefulness as discharge MOS.
As shown in Figure 5, cross when putting when voltage takes place, the DSG signal level uprises, through triode Q3 oppositely after the step-down level, promptly I4 is a low level, through NAND gate U1 and non-after O2 uprise level.As shown in Figure 7, I2 is a high level, I1 and I2 through NAND gate U1 and non-after the O1 step-down, i.e. CON step-down is turned off discharge metal-oxide-semiconductor Q5 and Q7 drawn high by load resistance because Q5 and Q7 disconnect DS-, as overcurrent/short-circuit protection from lock signal.
As shown in Figure 6, CON signal controlling discharge metal-oxide-semiconductor Q5, the grid of Q7, the Kai Heguan of control discharge; The Kai Heguan of CHG signal controlling charging metal-oxide-semiconductor Q6 and Q8; normally not under the over-charge protective situation; charging metal-oxide-semiconductor Q6 and Q8 conducting; DS-and P-equipotential; in charging metal-oxide-semiconductor Q6 and Q8 conducting, discharge metal-oxide-semiconductor Q5 and Q7 conducting when short circuit (overcurrent /), the DS-signal is drawn high; the DS-signal is forced the I4 signal to drag down through R2, Q9 etc., realizes short circuit/over current protecting self-locking.
As Fig. 7 and shown in Figure 4, PWR_SW is a high level when overcurrent, short circuit, through NAND gate U1 and non-after output O4 be low level, because of diode D6 clamping action, I4 is also for for low level.As shown in Figure 6, the I4 low level is turned off discharge metal-oxide-semiconductor Q5 and Q7.As shown in Figure 6, DS-and P-equipotential when normally not overcharging, electric core crosstalk this moment is pressed and through the internal resistance of cell DS-is drawn high.K switch 1 closure under normal circumstances, fault is in emergency circumstances pressed K1, I3 step-down level, O2 and I1 uprise, I2 also is high level (the VCC power supply is normal), I1 and I2 through NAND gate U1 and non-after, O1 step-down level,
CON signal low level is turned off discharge metal-oxide-semiconductor Q5 and Q7, realizes that K switch 1 cuts off self-lock.C25 and R70 guarantee powered on moment I5 and I6 high level behind NAND gate U1, and the I2 pin gets low level, and U1 NAND gate and non-back CON are high level, and this part prevents that powered on moment CON is locked into low level.
Overcurrent/short circuit in sum/K switch 1 is pressed (or pressing); baffle will be by turning off discharge metal-oxide-semiconductor Q5 and Q7; turn off main current supply circuit; and the realization self-locking, even overcurrent/short circuit is removed at this moment, perhaps switch lifts; current supply circuit is still turned off; do not exist and switch lifts in overcurrent/short circuit condition, disconnecting consumers powers on again, recovers normal.
Electric core group power supply hardware switch is set in the baffle; Increase auto-lock function after interlock circuit is finished overcurrent or short circuit (disconnecting consumers can release).
By partly increasing hardware switch at baffle, under the situation of electric motor car master control borad malfunction and failure, directly cut off electric core power supply, be used for emergency power off and parking; After the protection action that produces when overcurrent or short circuit takes place this action is pinned,, power on again and can remove, reliability is improved greatly until the load of breaking.
Above content be in conjunction with concrete preferred implementation to further describing that the utility model is done, can not assert that concrete enforcement of the present utility model is confined to these explanations.For the utility model person of an ordinary skill in the technical field, under the prerequisite that does not break away from the utility model design, can also make some simple deduction or replace, all should be considered as belonging to protection range of the present utility model.
Claims (3)
1. the lithium battery group protective device of a belt switch, it is characterized in that: comprise electric core group, baffle, hardware switch, described electric core group links to each other with described baffle, and described hardware switch links to each other with described baffle.
2. lithium battery group protective device according to claim 1 is characterized in that: this lithium battery group protective device also comprises lock cell, and described lock cell links to each other with described hardware switch with described baffle respectively.
3. lithium battery group protective device according to claim 2; it is characterized in that: this lithium battery group protective device comprises that also step-down adjusts circuit, LDO voltage stabilizing circuit, crosses and put protection with over current protecting self-locking circuit, charge and discharge MOS switch major loop, switch outage and cross and put and cross current circuit; described electric core group is adjusted circuit with described step-down and is linked to each other, described step-down adjust circuit respectively with described LDO voltage stabilizing circuit, described mistake put protection with over current protecting self-locking circuit, described charge and discharge MOS switch major loop, the outage of described switch and cross put with current circuit link to each other.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011201115381U CN202059161U (en) | 2011-04-15 | 2011-04-15 | Lithium battery pack protecting device with switch |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011201115381U CN202059161U (en) | 2011-04-15 | 2011-04-15 | Lithium battery pack protecting device with switch |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202059161U true CN202059161U (en) | 2011-11-30 |
Family
ID=45019125
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011201115381U Expired - Lifetime CN202059161U (en) | 2011-04-15 | 2011-04-15 | Lithium battery pack protecting device with switch |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202059161U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107656218A (en) * | 2017-11-06 | 2018-02-02 | 湖北汽车工业学院 | Induction heating power failure detects in real time and processing system |
| CN108155703A (en) * | 2018-03-11 | 2018-06-12 | 深圳大力神科技有限公司 | A kind of improvement lithium cell protecting device and its charging MOS protection circuits |
-
2011
- 2011-04-15 CN CN2011201115381U patent/CN202059161U/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107656218A (en) * | 2017-11-06 | 2018-02-02 | 湖北汽车工业学院 | Induction heating power failure detects in real time and processing system |
| CN108155703A (en) * | 2018-03-11 | 2018-06-12 | 深圳大力神科技有限公司 | A kind of improvement lithium cell protecting device and its charging MOS protection circuits |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20111130 |
|
| CX01 | Expiry of patent term |