CN207166173U - A kind of lithium battery for electric vehicle bag - Google Patents
A kind of lithium battery for electric vehicle bag Download PDFInfo
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- CN207166173U CN207166173U CN201721019363.5U CN201721019363U CN207166173U CN 207166173 U CN207166173 U CN 207166173U CN 201721019363 U CN201721019363 U CN 201721019363U CN 207166173 U CN207166173 U CN 207166173U
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- battery
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- resistance
- bag
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/70—Energy storage systems for electromobility, e.g. batteries
Abstract
The utility model provides a kind of lithium battery for electric vehicle bag, includes casing and the case lid being connected with casing, it is characterised in that：The casing top is symmetrically arranged with positive terminal and negative terminal, and the dividing plate laterally set in casing is divided into upper chamber and lower chambers, and battery protection circuit is installed with upper chamber, and bottom chamber is installed with one or more battery packs being concatenated；Total positive pole of one or more battery group is connected with positive terminal, and total negative pole is connected by the battery protecting circuit being arranged on battery protection circuit with negative terminal；The battery protecting circuit includes：Voltage detecting circuit, short-circuit protection circuit, switch driving circuit and power circuit.The utility model is simple in construction, internal structure arrangement is reasonable, can effectively prevent from causing pole, single lithium battery and other each element fallings because electric vehicle shakes, improve the reliability of battery bag.
Description
Technical field
It the utility model is related to new energy vehicle power battery technology field, and in particular to a kind of lithium battery for electric vehicle
Bag.
Background technology
In new-energy automobile field, main energy sources of the electrokinetic cell bag generally as electric car.It is dynamic as one kind
Power battery bag, middle-size and small-size lithium battery pack have bigger more light, capacity, good cycle and service life length due to it
The advantages that, start to be widely used on the electric cars such as battery-operated motor cycle, electro-tricycle in recent years.Electric car is in the process of moving
It can frequently suffer from jolting and producing various vibrations, cause electrode terminal and other each part situations easy to fall off, cause battery bag short
The danger such as road, on fire, produce the problem of lithium battery pack reliability is low.Therefore how to ensure that the arrangement of lithium battery pack internal structure is reasonable
And electrode terminal and other each part stable connections, it is to bite and need to solve the problems, such as in battery pack structure design.
Lithium battery pack in use, easily overcharges, mistake is put and the situation of short circuit.Lithium ion battery overcharges
When, cell voltage increases with polarization and risen rapidly, can cause the irreversible change and electrolyte of positive active material structure
Decompose, produce a large amount of gases, release substantial amounts of heat, sharply increase battery temperature and internal pressure, the hidden danger such as blast, burning be present.
Overdischarge can raise inner pressure of battery, and both positive and negative polarity active material invertibity is destroyed, electrolyte decomposition, negative pole lithium deposition, electricity
Resistance increase, also can only partly recover, capacity also has obvious decay even if charging.And lithium battery pack short circuit can then produce largely
Hot and too strong electric current release can cause battery life to be badly damaged.Therefore when battery bag designs, can consider to design battery
Bag protection circuit to be overcharged to battery bag, cross put, excessively stream and short-circuit protection.
At present, when carrying out battery protecting circuit design for the battery bag that more single lithium batteries are formed, conventional method
Pass through microprocessor（MCU）The battery parameters such as output voltage, the battery bag output total current of single lithium battery are gathered to judge electricity
Whether within normal range (NR), this method is to pass through software to Chi Bao output voltage and total current and cell output voltage
To realize battery bag protection circuit legal person, although simple with regard to required circuit structure, suitable for multiple battery, voltage parameter is matched somebody with somebody
Put flexibly, using the teaching of the invention it is possible to provide the relevant parameter such as voltage, electric current exports, and can complete to overcharge battery bag, put excessively, excessively stream guarantor
Shield, but because its software responses time is longer, the situation of battery bag short-circuit protection not in time can be caused, while cost also be present
Higher, popularization difficulty is big, microprocessor（MCU）The problem of utilization rate is relatively low.Therefore how to design and overcharge in lithium battery pack, mistake
Put, excessively stream, short-circuit protection circuit are needed to face and solved the problems, such as in the design of battery bag protection board.
The content of the invention
The utility model provides a kind of simple in construction, rational lithium battery for electric vehicle bag of internal structure arrangement, can
Effectively prevent from causing pole, single lithium battery and other each element fallings because electric car shakes, improve battery bag can
By property.
The technical solution of the utility model is as follows：
A kind of lithium battery for electric vehicle bag, includes casing and the case lid being connected with casing, and casing top is symmetrically set
Positive terminal and negative terminal are equipped with, the dividing plate laterally set in casing is divided into upper chamber and lower chambers, fixed in upper chamber
Battery protection circuit is installed, bottom chamber is installed with one or more battery packs being concatenated；One or more electricity
Total positive pole of pond group is connected with positive terminal, and total negative pole passes through the battery protecting circuit and negative pole that are arranged on battery protection circuit
Post connects；Battery protecting circuit includes：
Voltage detecting circuit, it is connected between each battery pack both positive and negative polarity, for carrying out voltage detecting and life to battery pack
There is low level or the first control signal of high level into output；
Short-circuit protection circuit, for when battery occurs short-circuit, generation and output to have the second of low level or high level
Control signal；
Switch driving circuit, it is connected respectively with voltage detecting circuit and short-circuit protection circuit, for first according to reception
Control signal or the second control signal generate and export the 3rd control signal with low level or high level；
Power circuit, it is connected with switch driving circuit, for controlling battery pack according to the 3rd control signal circuit of reception
Total turning on and off between negative pole and negative terminal.
Further, battery pack is in series by multiple battery blocks, and each battery block is then in parallel by multiple single lithium batteries
Form.
Further, short-circuit protection circuit includes triode Q1 and triode Q2, and triode Q1 base stage passes sequentially through
Resistance R4, resistance R6 connect with ground and be connecteds the total negative pole of battery pack by resistance R4, triode Q1 base stage also by R3 and
Ground connects, and resistance R4 both ends are also parallel with electric capacity C2, and resistance R3 both ends are also parallel with electric capacity C1, triode Q1 emitter stage and ground
Connect, triode Q1 colelctor electrode connection LEVEL ports；Triode Q2 colelctor electrode is connected with triode Q1 base stage, three poles
Pipe Q2 base stage passes sequentially through resistance R1 and resistance R2 is connected with LEVEL ports, and triode Q2 emitter stage connects with ground, and
It is connected by resistance R5 with base stage, resistance R2 both ends are also parallel with electric capacity C3.
Further, battery bag positive terminal, negative terminal take shape in one with battery bag casing in in-mould injection；Battery bag
Positive terminal or negative terminal include pole body, and the upper surface of pole body is provided with cylindrical boss, cylindrical boss top
The first screwed hole is offered along its axial direction, the second screwed hole is radially offered on the arcwall face on the right side of pole body on face,
The axially bored line of the axially bored line of first screwed hole and the second screwed hole is vertical.
Further, the strip groove of horizontal and vertical arrangement is further opened with the square face on the left of pole body；Its
In, horizontal strip groove is rotation stop groove, by filling up plastic cement inside it, can prevent electrode terminal on battery bag casing
Rotation, ensure the reliability of electrode terminal installation；And the strip groove of longitudinal direction is retaining groove, by filling up plastic cement inside it, energy
Enough prevent electrode terminal from being slid from battery bag casing, ensure the reliability of electrode terminal installation.
Further, case lid is connected to casing front end by snap features, and the snap features, which include, is arranged on case lid side
The first snap fit in edge side wall, the second snap fit positioned at case lid middle inside, be opened in the first hole clipping of wall box front end with
And it is opened in the second hole clipping on the extended surface to stretch out in the middle part of dividing plate；Case lid edge side wall is matched somebody with somebody with wall box front end
Close, the first snap fit is connected in the first hole clipping, and the second snap fit is connected in the second hole clipping.
Further, a plurality of reinforcement is provided with epicoele chamber interior walls.
Further, the foam material of self-contained battery group is also filled between battery pack and case lid.
In the utility model, casing top is symmetrically arranged with the positive terminal and negative terminal of lithium battery pack, is laterally set in casing
The dividing plate put is divided into upper chamber and lower chambers, and battery protection circuit is installed with upper chamber, and bottom chamber is solid
Dingan County rationally, can accommodate substantial amounts of monomer equipped with one or more battery packs being concatenated, simple in construction, internal structure arrangement
Lithium battery；Meanwhile battery bag positive terminal, negative terminal take shape in one with battery bag casing in in-mould injection, pole body is left
The strip groove of horizontal and vertical arrangement is further opened with the square face of side, avoid due to electric car shake and cause pole,
Single lithium battery and other each element fallings, improve the reliability of battery bag.
In the utility model, battery protecting circuit include voltage detecting circuit, short-circuit protection circuit, switch driving circuit and
Power circuit, switch driving circuit include switch driving circuit 1 and switch driving circuit 2；When situation about overcharging occurs in battery bag
When, voltage detecting circuit detects and exports the first control signal with high level and transmit to switch driving circuit 1, switch and drives
Dynamic circuit 1 is converted into having low level 3rd control signal and transmitted to power circuit according to the first control signal of reception,
Power circuit disconnects, so that it is guaranteed that being turned off between the total negative pole of battery pack and charger, realizes charging protection function.
When the situation with excessively stream occurred putting in battery bag, voltage detecting circuit is detected and exported with low level first
Control signal is simultaneously transmitted to switch driving circuit 2, and after switch driving circuit 2 receives low level second control signal, generation is simultaneously
Low level 3rd control signal is exported to power circuit, when power circuit receives low level three control signal, work(
Rate circuit disconnects, so that it is guaranteed that being turned off between the total negative pole of battery pack and load, realized and puts and overcurrent protection function.
In short-circuit protection circuit described in the utility model, when battery bag short-circuit conditions does not occur, triode Q1 is kept
Closed mode, the circuit that its state is mainly made up of triode Q2, resistance R1, resistance R2, resistance R5, electric capacity C3 determine；Specifically
For when initial, LEVEL ends are in high level state, after by resistance R1, resistance R2, resistance R5 partial pressures, lead triode Q2
It is logical, and triode Q1 is then closed；Wherein, electric capacity C3 and resistance R2 combinations, can prevent power surges switch tube
Q2 influence, adjust switching tube Q2 actuation times.
In short-circuit protection circuit described in the utility model, when battery bag occurs short-circuit, there is voltage entrance at P- ends, pass through
After resistance R4 and resistance R6 partial pressures, open triode Q1；After triode Q1 is opened, low level is exported to switch by LEVEL ends
Drive circuit, after switch driving circuit receives low level second control signal, generate and export low level 3rd control letter
Number to power circuit, when power circuit receives low level three control signal, power circuit is closed, so that it is guaranteed that battery
Turned off between the total negative pole of group and load, realize short-circuit protection function.
The beneficial effects of the utility model：
1. lithium battery for electric vehicle bag described in the utility model, it is reasonable that simple in construction, internal structure is arranged, Neng Gourong
Receive substantial amounts of single lithium battery；Meanwhile avoid electric vehicle vibrations and cause pole, single lithium battery and other each parts to take off
Fall, improve the reliability of battery bag.
2. lithium battery for electric vehicle bag described in the utility model, can be overcharged in battery bag, cross put, excessively stream with
And during short-circuit conditions, power circuit is disconnected automatically, so that it is guaranteed that being turned off between the total negative pole of battery pack and charger, load, realize
Protection, Cross prevention, overcurrent protection and short-circuit protection are overcharged, improves the stability and reliability of battery bag.
Brief description of the drawings
The accompanying drawing for forming the part of the application is used for providing further understanding to of the present utility model, of the present utility model
Schematic description and description is used to explain the utility model, does not form to improper restriction of the present utility model.In accompanying drawing
In：
Fig. 1 is the structural representation of casing；
Fig. 2 is the structural representation of case lid；
Fig. 3 is the positive terminal of battery bag and the stereogram one of negative terminal；
Fig. 4 is the positive terminal of battery bag and the stereogram two of negative terminal；
Fig. 5 is the schematic diagram of battery protecting circuit；
Fig. 6 is short-circuit protection circuit structure chart.
Embodiment
Embodiment of the present utility model is described in detail below in conjunction with accompanying drawing, but the utility model can be by right
It is required that the multitude of different ways for limiting and covering is implemented.
Referring to Figures 1 and 2, a kind of lithium battery for electric vehicle bag, casing 1 and the case lid being connected with casing 1 are included
2, the top of casing 1 is symmetrically arranged with positive terminal 3-1 and negative terminal 3-2, positive terminal 3-1, negative terminal 3-2 with the body of battery lodge 1
One is taken shape in in-mould injection；The dividing plate 4 laterally set in casing 1 is divided into upper chamber 5-1 and lower chambers 5-2, on
Battery protection circuit 6 is installed with chamber 5-1, and a plurality of reinforcement 7 is provided with upper chamber's 5-1 inwalls；Lower chambers
One or more battery packs 8 being concatenated are installed with 5-2, battery pack 8 is in series by multiple battery blocks, each battery
Block is then formed in parallel by multiple single lithium batteries；Total positive pole of multiple battery packs 8 is connected with positive pole 3-1 posts, and total negative pole is by setting
The battery protecting circuit 9 put on battery protection circuit 6 is connected with negative terminal 3-2；Also filled up between battery pack 8 and case lid 2
There is the foam material 12 of self-contained battery group.
Case lid 2 is connected to casing front end by snap features, and the snap features, which include, to be arranged in case lid edge side wall
The first snap fit 11-1, the second snap fit 11-2 positioned at case lid middle inside, the first hole clipping 11- for being opened in wall box front end
3 and the second hole clipping 11-4 for being opened on the extended surface 4-1 to stretch out at the middle part of dividing plate 4；The edge side wall of case lid 2 and casing
1 side wall front end coordinates, and the first snap fit 11-1 is connected in the first hole clipping 11-3, and the second snap fit 11-2 is connected to the second hole clipping 11-4
It is interior.
Reference picture 3 and Fig. 4, battery bag positive terminal 3-1 or negative terminal 3-2 include pole body 3-3, pole body 3-3
Upper surface be provided with cylindrical boss 3-4, offer the first screwed hole 3-5 along its axial direction on cylindrical boss 3-4 top surfaces,
Radially offer the second screwed hole 3-6 on arcwall face on the right side of pole body 3-3, the first screwed hole 3-5 axially bored line and
Second screwed hole 3-6 axially bored line is vertical；The length of horizontal and vertical arrangement is further opened with the square face of pole body 3-3 sides
Bar shaped groove 3-7.
Reference picture 5, battery protecting circuit includes：Voltage detecting circuit, it is connected between each battery pack both positive and negative polarity, is used for
Voltage detecting is carried out to battery pack and generates and export the first control signal with low level or high level；Short-circuit protection electricity
Road, for when battery occurs short-circuit, generation and output to have low level or the second control signal of high level；Switch drive electricity
Road, it is connected respectively with voltage detecting circuit and short-circuit protection circuit, for being controlled according to the first control signal of reception or second
Signal generation simultaneously exports the 3rd control signal with low level or high level；Power circuit, it is connected, uses with switch driving circuit
According to turning on and off between the total negative pole of the 3rd control signal circuit of reception control battery pack and negative terminal.
Reference picture 6, short-circuit protection circuit include triode Q1 and triode Q2, and triode Q1 base stage passes sequentially through electricity
Resistance R4, resistance R6 connect with ground and are connected the total negative pole of battery pack by resistance R4, and triode Q1 base stage also passes through R3 and ground
Connect, resistance R4 both ends are also parallel with electric capacity C2, and resistance R3 both ends are also parallel with electric capacity C1, triode Q1 emitter stage and ground phase
Connect, triode Q1 colelctor electrode connection LEVEL ports；Triode Q2 colelctor electrode is connected with triode Q1 base stage, triode
Q2 base stage passes sequentially through resistance R1 and resistance R2 is connected with LEVEL ports, and triode Q2 emitter stage connects with ground, Yi Jitong
Cross resistance R5 to be connected with base stage, resistance R2 both ends are also parallel with electric capacity C3.
Claims (8)
1. a kind of lithium battery for electric vehicle bag, include casing and the case lid being connected with casing, it is characterised in that：The case
Positive terminal and negative terminal are symmetrically arranged with the top of body, the dividing plate laterally set in casing is divided into upper chamber and lower chambers,
Battery protection circuit is installed with upper chamber, bottom chamber is installed with one or more battery packs being concatenated；
Total positive pole of one or more battery group is connected with positive terminal, and total negative pole is protected by the battery being arranged on battery protection circuit
Protection circuit is connected with negative terminal；The battery protecting circuit includes：
Voltage detecting circuit, be connected between each battery pack both positive and negative polarity, for battery pack carry out voltage detecting and generate and
First control signal of the output with low level or high level；
Short-circuit protection circuit, for when battery occurs short-circuit, generation and output to have the second of low level or high level to control
Signal；
Switch driving circuit, it is connected respectively with voltage detecting circuit and short-circuit protection circuit, for according to the first of reception the control
Signal or the second control signal generate and export the 3rd control signal with low level or high level；
Power circuit, it is connected with switch driving circuit, for controlling battery pack always to bear according to the 3rd control signal circuit of reception
Turning on and off between pole and negative terminal.
A kind of 2. lithium battery for electric vehicle bag as claimed in claim 1, it is characterised in that：The battery pack is by multiple battery blocks
It is in series, each battery block is then formed in parallel by multiple single lithium batteries.
A kind of 3. lithium battery for electric vehicle bag as claimed in claim 1, it is characterised in that：The short-circuit protection circuit includes
Triode Q1 and triode Q2, triode Q1 base stage pass sequentially through resistance R4, resistance R6 and connected and by resistance R4 with ground
The total negative pole of battery pack is connected, triode Q1 base stage is also connected by R3 with ground, and the resistance R4 both ends are also parallel with electric capacity C2,
The resistance R3 both ends are also parallel with electric capacity C1, and triode Q1 emitter stage connects with ground, triode Q1 colelctor electrode connection
LEVEL ports；Triode Q2 colelctor electrode is connected with triode Q1 base stage, triode Q2 base stage pass sequentially through resistance R1 and
Resistance R2 is connected with LEVEL ports, and triode Q2 emitter stage connects with ground, and is connected by resistance R5 with base stage, described
Resistance R2 both ends are also parallel with electric capacity C3.
A kind of 4. lithium battery for electric vehicle bag as claimed in claim 1, it is characterised in that：The battery bag positive terminal, negative pole
Post takes shape in one with battery bag casing in in-mould injection；The battery bag positive terminal or negative terminal include pole body,
The upper surface of the pole body is provided with cylindrical boss, and first is offered along its axial direction on the cylindrical boss top surface
Screwed hole, the second screwed hole, the axially bored line of the first screwed hole are radially offered on the arcwall face on the right side of the pole body
It is vertical with the axially bored line of the second screwed hole.
A kind of 5. lithium battery for electric vehicle bag as claimed in claim 4, it is characterised in that：It is square on the left of the pole body
The strip groove of horizontal and vertical arrangement is further opened with face.
A kind of 6. lithium battery for electric vehicle bag as claimed in claim 1, it is characterised in that：The case lid passes through snap features card
Be connected on casing front end, the snap features include be arranged in case lid edge side wall the first snap fit, positioned at case lid middle inside
The second snap fit, be opened in the first hole clipping of wall box front end and be opened on the extended surface to stretch out in the middle part of dividing plate
The second hole clipping；Case lid edge side wall coordinates with wall box front end, and the first snap fit is connected in the first hole clipping, the second snap fit card
It is connected in the second hole clipping.
A kind of 7. lithium battery for electric vehicle bag as claimed in claim 1, it is characterised in that：It is provided with the epicoele chamber interior walls
A plurality of reinforcement.
A kind of 8. lithium battery for electric vehicle bag as claimed in claim 1, it is characterised in that：Between the battery pack and case lid also
Foam material filled with self-contained battery group.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721019363.5U CN207166173U (en) | 2017-08-15 | 2017-08-15 | A kind of lithium battery for electric vehicle bag |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721019363.5U CN207166173U (en) | 2017-08-15 | 2017-08-15 | A kind of lithium battery for electric vehicle bag |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207166173U true CN207166173U (en) | 2018-03-30 |
Family
ID=61717358
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721019363.5U Active CN207166173U (en) | 2017-08-15 | 2017-08-15 | A kind of lithium battery for electric vehicle bag |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207166173U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107492926A (en) * | 2017-08-15 | 2017-12-19 | 湖南小步科技有限公司 | A kind of lithium battery for electric vehicle bag |
-
2017
- 2017-08-15 CN CN201721019363.5U patent/CN207166173U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107492926A (en) * | 2017-08-15 | 2017-12-19 | 湖南小步科技有限公司 | A kind of lithium battery for electric vehicle bag |
| CN107492926B (en) * | 2017-08-15 | 2024-01-19 | 长沙先度科技有限公司 | Lithium battery pack for electric vehicle |
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