CN207705767U - A kind of lithium battery group protection circuit - Google Patents
A kind of lithium battery group protection circuit Download PDFInfo
- Publication number
- CN207705767U CN207705767U CN201721762677.4U CN201721762677U CN207705767U CN 207705767 U CN207705767 U CN 207705767U CN 201721762677 U CN201721762677 U CN 201721762677U CN 207705767 U CN207705767 U CN 207705767U
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- oxide
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- Charge And Discharge Circuits For Batteries Or The Like (AREA)
Abstract
The utility model discloses a kind of lithium battery groups to protect circuit; the lithium battery includes several battery cores; the battery core is both provided with protection circuit; the output end of the battery core is by protecting circuit in parallel; each battery core is equipped with independent protection circuit in the utility model; so that during battery set charge/discharge; each battery core separate unit circuit is shunted; enable battery pack to carry more high current and reduces temperature; the utility model protects circuit as a kind of lithium battery group, is widely used in power technique fields.
Description
Technical field
The utility model is related to power technique fields more particularly to a kind of lithium battery group to protect circuit.
Background technology
Battery pack high magnification workplace has tended to increase length.The usual more cell parallel assemblings of lithium ion, by multiple batteries
B+ between, between B- respectively by welding manner parallel connection, pass through PCB protect circuit formed completed cell group (as shown in Figure 1).
Limited in size and space, it is limited that above-mentioned battery combination scheme can carry electric current, has limitation.
Utility model content
In order to solve the above-mentioned technical problem, the purpose of this utility model, which is to provide one kind, can make battery pack carrying bigger electricity
The lithium battery group of stream protects circuit.
Technical solution used by the utility model is：A kind of lithium battery group protection circuit, which includes several electricity
Core, the battery core are both provided with protection circuit, and the output end of the battery core is by protecting circuit in parallel.
Further, the protection circuit includes battery protection chip, the first metal-oxide-semiconductor, the second metal-oxide-semiconductor, third metal-oxide-semiconductor,
Four metal-oxide-semiconductors, first resistor, second resistance and the first capacitance, the model DW01 of the battery protection chip, described first
The drain electrode interconnection of metal-oxide-semiconductor, the second metal-oxide-semiconductor, third metal-oxide-semiconductor and the 4th metal-oxide-semiconductor, 2 feet point of the battery protection chip
Do not connect with the grid of first metal-oxide-semiconductor and third metal-oxide-semiconductor, 3 feet of the battery protection chip respectively with the 2nd MOS
Pipe is connected with the grid of the 4th metal-oxide-semiconductor, and the cathode of the battery core connects with the source electrode of second metal-oxide-semiconductor and the 4th metal-oxide-semiconductor respectively
It connecing, 5 feet of the battery protection chip are connect by first resistor with the anode of the battery core, and the 6 of the battery protection chip
Foot is connect by second resistance with the source electrode of first metal-oxide-semiconductor and third metal-oxide-semiconductor, the cathode of the battery core also with the battery
The 4 feet connection of chip is protected, the first capacitance, first metal-oxide-semiconductor and third are connected between the positive electrode and negative electrode of the battery core
Negative output terminal of the source electrode of metal-oxide-semiconductor as battery, the positive output end of the anode of the battery core as battery.
Further, first metal-oxide-semiconductor, the second metal-oxide-semiconductor, third metal-oxide-semiconductor and the 4th metal-oxide-semiconductor are N-type metal-oxide-semiconductor.
The utility model has the beneficial effects that：Each battery core is equipped with independent protection circuit in the utility model so that
During battery set charge/discharge, each battery core separate unit circuit is shunted so that battery pack can carry more high current and
Reduce temperature.
Description of the drawings
Specific embodiment of the present utility model is described further below in conjunction with the accompanying drawings：
Fig. 1 is the protection circuit connection diagram of the battery pack of the prior art；
Fig. 2 is the protection circuit connection diagram of the battery pack in one specific embodiment of the utility model；
Fig. 3 is the circuit diagram of one specific embodiment of the utility model.
Specific implementation mode
It should be noted that in the absence of conflict, the features in the embodiments and the embodiments of the present application can phase
Mutually combination.
As shown in Fig. 2, a kind of lithium battery group protects circuit, which includes several battery cores, and the battery core is respectively provided with
There is protection circuit, the output end of the battery core is by protecting circuit in parallel.
The utility model adds independent protection circuit to be combined into single battery group by each battery core, then passes through electricity among PCB
Active layer is in parallel respectively by P+, P-, at and to form more battery packs in parallel.During battery set charge/discharge, multiple batteries group has solely
Vertical element circuit is shunted, and carrying more high current and cooling function are reached.Under identical PCB dimensional spaces, the utility model phase
Current capacity, which can be carried, than conventional combination increases by 1 times.The utility model can increase MOSFET element number and apart from increase,
When high current works, opposite heat dissipation area increases by 1 times, is conducive to heat and distributes, and reduces heat and rises, reduce heat to MOSFET,
The power of battery and the influence in service life improve battery pack quality.
Embodiment 1
As a kind of specific embodiment, 2 battery cores of battery pack protection, 2 battery cores are equipped with protection circuit (similarly battery pack
May include multiple battery cores, protection circuit), wherein the schematic diagram of a protection circuit is as shown in figure 3, the protection circuit includes battery
Protect chip U1, the first metal-oxide-semiconductor Q1, the second metal-oxide-semiconductor Q2, third metal-oxide-semiconductor Q3, the 4th metal-oxide-semiconductor Q4, first resistor R1, the second electricity
Hinder R2 and the first capacitance C1, the model DW01 of the battery protection chip U1, which has and prevent from overcharging, excessively
Electric discharge, prevents large current charge, prevents the functions such as heavy-current discharge positive and negative anodes short circuit.The first metal-oxide-semiconductor Q1, the second metal-oxide-semiconductor
The drain electrode of Q2, third metal-oxide-semiconductor Q3 and the 4th metal-oxide-semiconductor Q4 interconnects, 2 feet of the battery protection chip U1 respectively with it is described
First metal-oxide-semiconductor Q1 is connected with the grid of third metal-oxide-semiconductor Q3,3 feet of the battery protection chip U1 respectively with second metal-oxide-semiconductor
The grid of Q2 and the 4th metal-oxide-semiconductor Q4 connect, the cathode B1- of the battery core respectively with the second metal-oxide-semiconductor Q2 and the 4th metal-oxide-semiconductor Q4
Source electrode connection, 5 feet of the battery protection chip U1 are connect by first resistor R1 with the positive B1+ of the battery core, described
6 feet of battery protection chip U1 are connect by second resistance R2 with the source electrode of the first metal-oxide-semiconductor Q1 and third metal-oxide-semiconductor Q3.Institute
The cathode B1- for stating battery core is also connect with 4 feet of the battery protection chip U1, between the positive B1+ and cathode B1- of the battery core
It is connected with the first capacitance C1.Negative output terminal P- of the source electrode of the first metal-oxide-semiconductor Q1 and third metal-oxide-semiconductor Q3 as battery, it is described
Positive output end P+s of the positive B1+ of battery core as battery.The first metal-oxide-semiconductor Q1, the second metal-oxide-semiconductor Q2, in the present embodiment
Three metal-oxide-semiconductor Q3 and the 4th metal-oxide-semiconductor Q4 are N-type metal-oxide-semiconductor
Circuit uses monocell independent protective, then more battery packs are connected in parallel, and PCB uses multilayer wiring mode,
Middle layer connects more battery packs without passing through the outer processing of welding as bus plane is connected in parallel.
It is to be illustrated to the preferable implementation of the utility model, but the invention is not limited to the reality above
Example is applied, those skilled in the art can also make various equivalent changes without departing from the spirit of the present invention
Shape or replacement, these equivalent deformations or replacement are all contained in the application claim limited range.
Claims (2)
1. a kind of lithium battery group protects circuit, it is characterised in that：The lithium battery includes several battery cores, and the battery core is both provided with
Circuit is protected, for the output end of the battery core by protecting circuit in parallel, the protection circuit includes battery protection chip, first
Metal-oxide-semiconductor, the second metal-oxide-semiconductor, third metal-oxide-semiconductor, the 4th metal-oxide-semiconductor, first resistor, second resistance and the first capacitance, the battery are protected
The model DW01 of chip is protected,
The drain electrode interconnection of first metal-oxide-semiconductor, the second metal-oxide-semiconductor, third metal-oxide-semiconductor and the 4th metal-oxide-semiconductor, the battery protection
2 feet of chip are connect with the grid of first metal-oxide-semiconductor and third metal-oxide-semiconductor respectively, 3 feet of the battery protection chip respectively with
The grid of second metal-oxide-semiconductor and the 4th metal-oxide-semiconductor connects, the cathode of the battery core respectively with second metal-oxide-semiconductor and the 4th MOS
The source electrode of pipe connects, and 5 feet of the battery protection chip are connect by first resistor with the anode of the battery core, and the battery is protected
6 feet of shield chip are connect by second resistance with the source electrode of first metal-oxide-semiconductor and third metal-oxide-semiconductor, and the cathode of the battery core is also
It is connect with 4 feet of the battery protection chip, is connected with the first capacitance between the positive electrode and negative electrode of the battery core, described first
Negative output terminal of the source electrode of metal-oxide-semiconductor and third metal-oxide-semiconductor as battery pack, the positive output of the anode of the battery core as battery pack
End.
2. lithium battery group according to claim 1 protects circuit, it is characterised in that：First metal-oxide-semiconductor, the second metal-oxide-semiconductor,
Third metal-oxide-semiconductor and the 4th metal-oxide-semiconductor are N-type metal-oxide-semiconductor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721762677.4U CN207705767U (en) | 2017-12-15 | 2017-12-15 | A kind of lithium battery group protection circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721762677.4U CN207705767U (en) | 2017-12-15 | 2017-12-15 | A kind of lithium battery group protection circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207705767U true CN207705767U (en) | 2018-08-07 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721762677.4U Active CN207705767U (en) | 2017-12-15 | 2017-12-15 | A kind of lithium battery group protection circuit |
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| CN (1) | CN207705767U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114696123A (en) * | 2020-12-28 | 2022-07-01 | 北京小米移动软件有限公司 | Battery protection plate and manufacturing method thereof, battery and terminal |
-
2017
- 2017-12-15 CN CN201721762677.4U patent/CN207705767U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114696123A (en) * | 2020-12-28 | 2022-07-01 | 北京小米移动软件有限公司 | Battery protection plate and manufacturing method thereof, battery and terminal |
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