CN208873842U - A kind of lithium iron phosphate battery protection device based on car start - Google Patents
A kind of lithium iron phosphate battery protection device based on car start Download PDFInfo
- Publication number
- CN208873842U CN208873842U CN201821714620.1U CN201821714620U CN208873842U CN 208873842 U CN208873842 U CN 208873842U CN 201821714620 U CN201821714620 U CN 201821714620U CN 208873842 U CN208873842 U CN 208873842U
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- CN
- China
- Prior art keywords
- battery
- iron phosphate
- switch
- lithium iron
- discharge
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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- GELKBWJHTRAYNV-UHFFFAOYSA-K lithium iron phosphate Chemical compound [Li+].[Fe+2].[O-]P([O-])([O-])=O GELKBWJHTRAYNV-UHFFFAOYSA-K 0.000 title claims abstract 16
- 238000007599 discharging Methods 0.000 claims abstract description 6
- 229910001416 lithium ion Inorganic materials 0.000 claims description 29
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 claims description 27
- 229910052744 lithium Inorganic materials 0.000 claims description 21
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 claims description 8
- 150000002500 ions Chemical class 0.000 claims description 2
- 238000000034 method Methods 0.000 abstract description 9
- 239000005955 Ferric phosphate Substances 0.000 description 36
- 229940032958 ferric phosphate Drugs 0.000 description 36
- WBJZTOZJJYAKHQ-UHFFFAOYSA-K iron(3+) phosphate Chemical compound [Fe+3].[O-]P([O-])([O-])=O WBJZTOZJJYAKHQ-UHFFFAOYSA-K 0.000 description 36
- 229910000399 iron(III) phosphate Inorganic materials 0.000 description 36
- 230000005611 electricity Effects 0.000 description 6
- 230000001681 protective effect Effects 0.000 description 5
- 229910052493 LiFePO4 Inorganic materials 0.000 description 3
- 239000002253 acid Substances 0.000 description 3
- 238000004880 explosion Methods 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- NBIIXXVUZAFLBC-UHFFFAOYSA-N Phosphoric acid Chemical compound OP(O)(O)=O NBIIXXVUZAFLBC-UHFFFAOYSA-N 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 1
- QSNQXZYQEIKDPU-UHFFFAOYSA-N [Li].[Fe] Chemical compound [Li].[Fe] QSNQXZYQEIKDPU-UHFFFAOYSA-N 0.000 description 1
- 229910000147 aluminium phosphate Inorganic materials 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 229910052698 phosphorus Inorganic materials 0.000 description 1
- 239000011574 phosphorus Substances 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 230000001052 transient effect Effects 0.000 description 1
- 238000012795 verification Methods 0.000 description 1
Classifications
-
- 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
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
Landscapes
- Secondary Cells (AREA)
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
Abstract
本实用新型涉及汽车用电池保护技术领域，公开了一种基于汽车启动型磷酸铁锂电池保护装置，包括带有正极充电接口、负极充电接口、电池组的主电路；主电路上设置有启动模块，启动模块包括电磁继电器、电磁式电源总开关和继电器控制板；电磁继电器包括电磁线圈和常开式触动开关，继电器控制板、启动开关、电磁线圈串联于电池组的正、负极两端，常开式触动开关与电磁式电源总开关串联于正极充电接口和负极充电接口之间；继电器控制板的输出端与负极充电接口连接。本实用新型可在对磷酸铁锂电池在充放电过程中实现整组电池均衡充、放电，同时在电池组为发动机的启动提供瞬时大电流的过程中，不会产生整车断电。
The utility model relates to the technical field of battery protection for automobiles, and discloses an automobile start-up type lithium iron phosphate battery protection device, which comprises a main circuit with a positive electrode charging interface, a negative electrode charging interface and a battery pack; , the starting module includes an electromagnetic relay, an electromagnetic power main switch and a relay control board; the electromagnetic relay includes an electromagnetic coil and a normally open touch switch, the relay control board, the starting switch, and the electromagnetic coil are connected in series with the positive and negative ends of the battery pack. The open touch switch and the electromagnetic power main switch are connected in series between the positive charging interface and the negative charging interface; the output end of the relay control board is connected with the negative charging interface. The utility model can realize the balanced charging and discharging of the whole battery group during the charging and discharging process of the lithium iron phosphate battery, and at the same time, during the process that the battery pack provides instantaneous high current for starting the engine, the whole vehicle is not powered off.
Description
Technical field
The utility model relates to automotive battery protection technique fields, in particular to one kind to be based on automobile starting type ferric phosphate
Lithium cell protecting device.
Background technique
The useful lithium ion battery of automobile starting battery replaces the trend of lead-acid accumulator.Common lithium-ion electricity is used through practice
All there is accidental safety problem, such as high temperature when replacing lead-acid accumulator including poly-lithium battery, ternary lithium battery in pond
Performance, cutting resistance etc., poly-lithium battery, the maximum safety problem of ternary lithium battery group are exactly to be easy in extreme circumstances
Explosion on fire.According to the characteristic research of various lithium batteries, it is found that the puncture resistance of one of ferric phosphate lithium cell is fine, even if
Flatten, it is damaged will not be on fire from explosion, will not occur the case where leakage explosion, while LiFePO4 electricity in the case of a high temperature
Pond will double with respect to lead-acid accumulator energy density, self-discharge rate is lower, have as automobile starting type battery very big
Advantage.
Ferric phosphate lithium cell is generally required in charge and discharge is arranged suitable electric discharge according to the charge-discharge characteristic of itself in advance
Voltage range and charging voltage section.To prevent the improper charge and discharge of ferric phosphate lithium cell from generating damage, LiFePO4 to battery
The protection circuit that battery needs profession at work is controlled, and the charging current of single of main control or whole group battery is put
The parameters such as electric current, voltage.
Due to the inherent characteristic of rotating speed of automobile engine variation, ferric phosphate lithium cell is used in automobile current generator and controls charging cable
It when road, is charged after cold-starting automobile with high current, about 15-20A, the included protection of such 12V ferric phosphate lithium cell
Route will start protection, and automobile is caused to occur the case where of short duration vehicle vehicle power-off after a cold start, though it is unlikely to cause to stop working,
Also the equipment such as headlight, sound equipment can be made to power off, is possible to that automobile engine apparatus such as computer can be damaged under extreme case；Separately
All very big for huge discharge automobile starting electric current outside, more than 200A or more, common 12V ferric phosphate lithium cell carries protection circuit
Plate will start battery self-protection and automobile can not be started.
Utility model content
Based on problem above, the utility model provides one kind and is based on automobile starting type ferric phosphate lithium cell protective device,
The battery balanced charge and discharge of whole group can be being realized in charge and discharge process to ferric phosphate lithium cell, while be engine in battery pack
Starting provide transient high-current during, will not generate vehicle power-off.
In order to solve the above technical problems, the utility model is achieved through the following technical solutions:
One kind being based on automobile starting type ferric phosphate lithium cell protective device, including with positive charging interface and cathode charging
The main circuit of interface is in series with charging control switch, discharge control switch and battery module, battery module packet on main circuit
Multiple single group ferric phosphate lithium ion batteries are included, each single group ferric phosphate lithium ion battery is provided with charge and discharge protecting module；It is main
Starting module is provided on circuit, starting module includes electromagnetic relay, electromagnetic power-supply general switch and driven by the starting of automobile
Close the relay control panel of control；Electromagnetic relay includes electromagnetic coil and the touch open in usual by solenoid controlled folding
Switch, relay control panel, start switch, electromagnetic coil is series at the positive and negative electrode both ends of battery pack, touch switch open in usual with
Electromagnetic power-supply general switch is series between positive charging interface and cathode charging interface；The output end of relay control panel and negative
The connection of pole charging interface.
Further, battery module is mainly connected in series by four single group ferric phosphate lithium ion batteries.
Further, it is connected with charge control mos gate pole on charging control switch, is connected with electric discharge on discharge control switch
Control mos gate pole.
Further, charge and discharge protecting module includes single group Li battery protection IC, the setting of single group Li battery protection IC
There are charge control pin CO, control of discharge pin DO, over-discharge current legs VM, battery positive pin VDD and battery negative terminal pin
VSS；Charge control pin CO and charge control mos gate pole are electrically connected, and control of discharge pin DO and control of discharge mos gate are extremely electric
Property connection；Battery positive pin VDD is connect with single group ferric phosphate lithium ion battery anode, battery negative terminal pin VSS and single group phosphorus
Sour iron negative electrode of lithium ion battery connection.
Further, the over-discharge current legs VM of single group Li battery protection IC and single group ferric phosphate lithium ion battery is negative
Overcurrent protection resistance is provided between pole.
Further, the positive and negative electrode both ends of single group ferric phosphate lithium ion battery are connected with shunting discharge paths, shunt electric discharge
Branch includes being series at the diverting switch and shunt resistance shunted in discharge paths.
Compared with prior art, the utility model has the beneficial effects that using single group Li battery protection IC respectively to four
Every single group ferric phosphate lithium ion battery of serial number carry out charging overvoltage, electric discharge under-voltage, overcurrent, short circuit protection；Automobile
Generator reaches the function of equalizaing charge to realization each group battery in ferric phosphate lithium ion battery charging process；LiFePO4 ion
When battery High-current output starts automobile, have the function of for charge and discharge protecting module being shorted, the charge and discharge protecting module short time
It does not work, guarantees the other circuit normal power supplies of vehicle.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of the utility model；
Fig. 2 is the structural schematic diagram of electromagnetic relay；
Wherein, 1, positive charging interface；2, cathode charging interface；3, charging control switch；4, discharge control switch；5, single
Group ferric phosphate lithium ion battery；6, relay control panel；7, electromagnetic power-supply general switch；8, electromagnetic relay；9, electromagnetic coil；
10, touch switch open in usual；11, charge control mos gate pole；12, control of discharge mos gate pole；13, single group li-ion cell protection core
Piece；14, overcurrent protection resistance；15, diverting switch；16, shunt resistance.
Specific embodiment
The utility model is further described with reference to the accompanying drawings and embodiments, but not as to the utility model
It limits.
Embodiment:
One kind being based on automobile starting type ferric phosphate lithium cell protective device, including fills with positive charging interface 1 and cathode
The main circuit of electrical interface 2 is in series with charging control switch 3, discharge control switch 4 and battery module, battery pack on main circuit
Module includes multiple single group ferric phosphate lithium ion batteries 5, and each single group ferric phosphate lithium ion battery 5 is provided with charge and discharge protecting
Module；It is provided with starting module on main circuit, starting module includes electromagnetic relay 8, electromagnetic power-supply general switch 7 and by automobile
The relay control panel 6 for starting switch control；Electromagnetic relay 8 includes electromagnetic coil 9 and is opened and closed by the control of electromagnetic coil 9
Touch switch open in usual 10, relay control panel 6, start switch, electromagnetic coil 9 is series at the positive and negative electrode both ends of battery pack,
Touch switch 10 and electromagnetic power-supply general switch 7 open in usual are series between positive charging interface 1 and cathode charging interface 2；After
The output end of appliance controling plate 6 is connect with cathode charging interface 2.
Battery module is mainly connected in series by four single group ferric phosphate lithium ion batteries 5.
It is connected with charge control mos gate pole 11 on charging control switch 3, is connected with control of discharge on discharge control switch 4
Mos gate pole 12.
Charge and discharge protecting module includes single group Li battery protection IC 13, and single group Li battery protection IC 13 is provided with charging
Control pin CO, control of discharge pin DO, over-discharge current legs VM, battery positive pin VDD and battery negative terminal pin VSS；It fills
Electric control pin CO and charge control mos gate pole 11 are electrically connected, and control of discharge pin DO and control of discharge mos gate pole 12 are electrically
Connection；Battery positive pin VDD is connect with 5 anode of single group ferric phosphate lithium ion battery, battery negative terminal pin VSS and single group phosphoric acid
The connection of 5 cathode of iron lithium ion battery.
Between the over-discharge current legs VM of single group Li battery protection IC 13 and the cathode of single group ferric phosphate lithium ion battery 5
It is provided with overcurrent protection resistance 14.
The positive and negative electrode both ends of single group ferric phosphate lithium ion battery 5 are connected with shunting discharge paths, shunt discharge paths and include
It is series at the diverting switch 15 and shunt resistance 16 shunted in discharge paths.
In the present embodiment, automobile is started switch including STA terminal and electromagnetic relay 8, when engine is in starting, is opened
Dynamic signal is sent to STA terminal and electromagnetic relay 8 simultaneously, and allows the coil motion of electromagnetic relay 8, operates petrol pump.Electricity
When single group 5 serial connection charge of ferric phosphate lithium ion battery in the group module of pond, corresponding overvoltage protection signal control shunts electric discharge
The diverting switch 15 of branch is closed.According to the PNGV equivalent-circuit model of battery, shunt resistance 16, which is equivalent to, at this time is first full of
The load of single group ferric phosphate lithium ion battery 5 makes 5 both ends of single group ferric phosphate lithium ion battery by discharging to shunt resistance 16
Voltage maintains near full state in a very small range.Assuming that wherein one group of ferric phosphate lithium ion battery 5 has first charged
At into overvoltage protection state, then electric current is no longer flow towards this group of ferric phosphate lithium ion battery in main circuit, but charging current
Another three groups of concatenated batteries are passed through by shunt resistance 16 to continue to charge.When all single group ferric phosphate lithium ion batteries 5 fill
When electricity enters overvoltage protection state, four 5 voltage swings of single group ferric phosphate lithium ion battery are essentially equal in error range,
The charge protection control signal of each single group Li battery protection IC 13 is lower, and can not be the charge control MOS in main circuit
Grid 11 provides grid bias, turns it off, and major loop disconnects, i.e. realization equalizaing charge, charging process is completed.
When battery module electric discharge, external world's load passes through positive charging interface 1, cathode charging interface 2 and battery respectively
The positive and negative anodes connection of group, the flow direction of discharge current are as follows: 3 → discharge control switch of cathode 2 → charging control switch of charging interface 4 →
Battery module → anode charging interface 1.The electric discharge low-voltage protection of charge and discharge protective chip 13, overcurrent and short circuit are protected in system
Shield control signal is connected output after light-coupled isolation, and the conducting for discharge control switch 4 in main circuit provides grid voltage: once
Four single group ferric phosphate lithium ion batteries 5 encounter the special circumstances such as under-voltage or overcurrent and short circuit during discharge, corresponding
Discharge prevention control signal be lower, grid bias can not be provided for the control of discharge mos gate pole 12 in main circuit, make its pass
Disconnected, major loop disconnects, that is, terminates use process of discharging.
When starting automobile, battery module out-put supply is pressed by ignition switch offer 3~12V positive electricity and is started switch
STA terminal, STA Terminal control relay control panel 6 are powered, and the electromagnetic coil 9 of electromagnetic relay 8, which is powered, generates magnetic force, thus
Electromagnetic power-supply general switch 7 is connected.High-rate battery discharge circuit when automobile starting: cathode charging interface 2 → electromagnetic type electricity
Source 7 → ferric phosphate lithium cell of master switch → anode charging interface 1；Charge and discharge protecting module is shorted at this time, charge and discharge protecting module
Short time does not work, and guarantees the other circuit normal power supplies of vehicle.
It as above is the embodiments of the present invention.Design parameter in above-described embodiment and embodiment is merely to clear
Utility model verification process is stated by Chu, not to limit the scope of patent protection of the utility model, the patent of the utility model
Protection scope is still subject to the claims, equivalent made by all specifications and accompanying drawing content with the utility model
Structure change similarly should be included in the protection scope of the utility model.
Claims (6)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821714620.1U CN208873842U (en) | 2018-10-22 | 2018-10-22 | A kind of lithium iron phosphate battery protection device based on car start |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821714620.1U CN208873842U (en) | 2018-10-22 | 2018-10-22 | A kind of lithium iron phosphate battery protection device based on car start |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208873842U true CN208873842U (en) | 2019-05-17 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201821714620.1U Expired - Fee Related CN208873842U (en) | 2018-10-22 | 2018-10-22 | A kind of lithium iron phosphate battery protection device based on car start |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110460133A (en) * | 2019-09-03 | 2019-11-15 | 四川四美科技有限公司 | A kind of balanced charging method of battery |
| CN111952660A (en) * | 2020-09-23 | 2020-11-17 | 山西石伟达机电科技股份有限公司 | Lithium ion storage battery device for mine trackless rubber-tyred vehicle |
-
2018
- 2018-10-22 CN CN201821714620.1U patent/CN208873842U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110460133A (en) * | 2019-09-03 | 2019-11-15 | 四川四美科技有限公司 | A kind of balanced charging method of battery |
| CN111952660A (en) * | 2020-09-23 | 2020-11-17 | 山西石伟达机电科技股份有限公司 | Lithium ion storage battery device for mine trackless rubber-tyred vehicle |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20190517 Termination date: 20201022 |
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| CF01 | Termination of patent right due to non-payment of annual fee |