CN205790286U - A kind of circuit improving low temperature performance of lithium iron phosphate batteries - Google Patents
A kind of circuit improving low temperature performance of lithium iron phosphate batteries Download PDFInfo
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- CN205790286U CN205790286U CN201520804334.4U CN201520804334U CN205790286U CN 205790286 U CN205790286 U CN 205790286U CN 201520804334 U CN201520804334 U CN 201520804334U CN 205790286 U CN205790286 U CN 205790286U
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- battery bag
- control switch
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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
- 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
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Abstract
A kind of circuit improving low temperature performance of lithium iron phosphate batteries, including battery bag and the LC oscillating circuit being connected to described battery bag two ends, described LC oscillating circuit is used for heating described battery bag.It is that one utilizes the internal self-resistance i.e. internal resistance of ferric phosphate lithium cell to produce certain heat by the work of LC oscillating circuit, to reach to improve battery own temperature to the problem improving battery poor performance at low temperatures in this is novel.Accomplish not against external heat source to provide heat, and guarantee that the intensification of battery is uniform, process safety is reliable.
Description
Technical field
Basis is the most novel belongs to technical field of lithium batteries, particularly relates to one and improves ferric phosphate lithium cell low temperature
The circuit of performance.
Background technology
Ferric phosphate lithium cell belongs to lithium rechargeable battery, as the newcomer of lithium ion battery family,
It has multiple advantage: solve the safety issue of battery, life-span length, high-temperature behavior is good, hold
Measure big, lightweight, environmental protection, memory-less effect etc., be the domestic new forms of energy being widely used at present electricity
Pond material.But it has an extremely significantly shortcoming poor performance at low temperatures so that battery is at low temperature
In the case of exist discharge and recharge difficulty problem.The charging temperature of ferric phosphate lithium cell can be only in 0
DEG C～45 DEG C within the temperature range of, the discharge temp of battery can be only in-20 DEG C～the model of 60 DEG C simultaneously
Within enclosing, exceeding this temperature range can produce expendable injury to battery.When temperature is less than
When-20 DEG C, ferric phosphate lithium cell there will be substantially to deteriorate and can not maintain the performance under normal temperature condition, i.e.
Poor performance at low temperatures, affects reliability and the working life of battery to a certain extent.In order to effectively carry
The cryogenic property of high ferric phosphate lithium cell, many-side had put into substantial amounts of manpower and materials in the last few years,
Cryogenic property is done substantial amounts of research, has mainly been started with by both direction: one has been from battery itself
Set out, be substantially from make battery time add other positive electrodes, exploitation low-temperature electrolyte, open
Send out four aspects such as the negative material of high-lithium ion diffusion coefficient, positive electrode nanorize to change
Enter, in the cryogenic property improve battery, up to the present there is no obvious effect；Another kind is logical
Crossing cell outer end cladding low-temperature heat film and LiFePO4 battery core is carried out external heat, this is also present
The technological means of conventional steady temperature, this method to some extent solves battery core low temperature properties
The problem of energy difference.But owing to heating film belongs to external heat source, himself there is programming rate same slowly
Time power-off after heat dissipation speed fast, and easily produce that heating is uneven, safety is unstable
Problem.Thus ferric phosphate lithium cell can be caused to be difficult to meet some low temperature bar during business-like
Use requirement under part.
Summary of the invention
The purpose of this utility model is to solve to improve original use external heat source to bring heating not
The problems such as uniformly, safety is unstable.
For solving above-mentioned technical problem, this novel offer one improves low temperature performance of lithium iron phosphate batteries
Circuit, including battery bag and the LC oscillating circuit being connected to described battery bag two ends, described LC
Oscillating circuit is used for heating described battery bag.
Further, battery bag is made up of multiple cell connection in series-parallel；Described LC oscillating circuit
Switch is controlled including an inductance, an electric capacity and one；First electrode of battery bag successively with electric capacity, electricity
Sense and control switch be connected in series, control switch have the first control end and second control end, first
Controlling end and be connected to the second electrode of battery bag, second controls end is connected to described electric capacity in the first electricity
Between pole；When described control switch controls end Guan Bi with first, described battery bag, electric capacity, inductance
And control switch formation series loop；When described control switch controls end Guan Bi with second, described control
Electric capacity processed, inductance and control switch form series loop.
Further, a switch controller being connected to control switch, described on-off control are also included
Device is for controlling end to control described in certain FREQUENCY CONTROL to switch with the first control end and second
Guan Bi and disconnection.
Further, the described switch that controls controls end Guan Bi with the frequency disconnected equal to described with first
Control switch and the second Guan Bi controlling end and frequency disconnected.
Further, described first electrode is the negative or positive electrode of battery bag, corresponding, the second electricity
The extremely negative pole of battery bag or positive pole.
Basis is the most novel to be provided the benefit that: be that one utilizes ferric phosphate lithium cell internal certainly in this is the most novel
Body resistance i.e. internal resistance produces certain heat by the work of LC oscillating circuit, to reach to improve battery certainly
The problem that body temperature improves battery poor performance at low temperatures.Accomplish to provide heat not against external heat source
Amount, and guarantee that the intensification of battery is uniform, process safety is reliable.
Accompanying drawing explanation
Fig. 1 is a kind of circuit theory improving low temperature performance of lithium iron phosphate batteries of this novel offer
Figure.
Detailed description of the invention
As it is shown in figure 1, the one for this novel preferred implementation offer improves ferric phosphate lithium cell
The circuit 100 of cryogenic property, 1. and is connected to the LC at described battery bag 1. two ends including battery bag
2., 2. described LC oscillating circuit is used for heating described battery bag 1. oscillating circuit.
Concrete, battery bag 1. can be by the multiple cell connection in series-parallel groups being arranged in electric motor car
Become, it is also possible at least one cell being arranged on other devices.Described LC oscillating circuit
2. include that an inductance L, an electric capacity C and one control switch S.1. battery bag includes being positioned at two ends
First electrode 11 and the second electrode 12.Battery bag the first electrode 11 1. successively with electric capacity C, electricity
Sense L and control switch are connected in series, and control switch S and have the first control end S1And second control end
S2, first controls end is connected to the second electrode 1 of battery bag2, second controls end S2It is connected to described
Electric capacity C is between the first electrode 11.The described switch S and first that controls controls end S1During Guan Bi,
Described battery bag 1., electric capacity C, inductance L and control switch S formed series loop；Described control
Switch S and second controls end S2During Guan Bi, described control electric capacity C, inductance L and control switch S
Form series loop.Described first electrode 11 is battery bag negative or positive electrode 1., corresponding,
Second electrode 12 is battery bag negative pole 1. or positive pole.
Operation principle is as follows: when 1. battery bag is under low temperature state, first make control switch with
First controls end S1Guan Bi, 2. 1. battery bag turn on LC oscillating circuit, and 1. battery bag gives LC
2. oscillating circuit conducting provides certain energy, produces electric current I1；It is then turned off S1It is closed at S2,
LC oscillating circuit Guan Bi produces electric current I2。
Then by controlling the first control end S of switch S in certain frequency regulation1End is controlled with second
S2Constantly open Guan Bi, battery bag 1. in have stable alternating current to pass through, work a period of time after,
Rely on the 1. internal resistance of battery bag to produce certain heat, thus improve battery bag property the most at low ambient temperatures
The inferior position of energy difference.
Further, the circuit 100 improving low temperature performance of lithium iron phosphate batteries also includes that one is connected to
Controlling the switch controller of switch, described switch controller is for control described in certain FREQUENCY CONTROL
System switch controls end S with first1And second control end S2Guan Bi and disconnection.Concrete, described
Control switch and control end S with first1Guan Bi controls switch and second with the frequency disconnected equal to described
Control end S2Guan Bi with disconnect frequency.
It is that one utilizes the internal self-resistance i.e. internal resistance of ferric phosphate lithium cell to pass through LC in this is novel
Oscillating circuit work produces certain heat, to reach to improve battery own temperature to improve battery low temperature
The problem of poor performance.Accomplish not against external heat source to provide heat, and guarantee the intensification of battery
Uniformly, process safety is reliable.
The foregoing is only this novel embodiment, not thereby limit this novel patent model
Enclosing, every equivalent structure utilizing this novel description and accompanying drawing content to be made or equivalence flow process become
Change, or be directly or indirectly used in other relevant technical fields, be the most in like manner included in this novel
In scope of patent protection.
Claims (5)
1. the circuit improving low temperature performance of lithium iron phosphate batteries, it is characterised in that: including battery bag and be connected to the LC oscillating circuit at described battery bag two ends, described LC oscillating circuit is used for heating described battery bag.
Improve the circuit of low temperature performance of lithium iron phosphate batteries the most as claimed in claim 1, it is characterised in that: battery bag is made up of multiple cell connection in series-parallel；Described LC oscillating circuit includes that an inductance, an electric capacity and one control switch；First electrode of battery bag is connected in series with electric capacity, inductance and control switch successively, controls switch and has the first control end and the second control end, and first controls end is connected to the second electrode of battery bag, and second controls end is connected to described electric capacity between the first electrode；When described control switch controls end Guan Bi with first, described battery bag, electric capacity, inductance and control switch form series loop；When described control switch controls end Guan Bi with second, described electric capacity, inductance and control switch form series loop.
Improve the circuit of low temperature performance of lithium iron phosphate batteries the most as claimed in claim 2, it is characterized in that: also include a switch controller being connected to control switch, described switch controller controls Guan Bi and the disconnection of end for controlling end and second with control switch described in certain FREQUENCY CONTROL with first.
Improve the circuit of low temperature performance of lithium iron phosphate batteries the most as claimed in claim 3, it is characterised in that: described control switch controls end Guan Bi with first and the frequency disconnected controls the Guan Bi of end and the frequency disconnected equal to the described switch and second that controls.
Improve the circuit of low temperature performance of lithium iron phosphate batteries the most as claimed in claim 2, it is characterised in that: described first electrode is the negative or positive electrode of battery bag, corresponding, the second electrode is negative pole or the positive pole of battery bag.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520804334.4U CN205790286U (en) | 2015-10-18 | 2015-10-18 | A kind of circuit improving low temperature performance of lithium iron phosphate batteries |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520804334.4U CN205790286U (en) | 2015-10-18 | 2015-10-18 | A kind of circuit improving low temperature performance of lithium iron phosphate batteries |
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| Publication Number | Publication Date |
|---|---|
| CN205790286U true CN205790286U (en) | 2016-12-07 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520804334.4U Active CN205790286U (en) | 2015-10-18 | 2015-10-18 | A kind of circuit improving low temperature performance of lithium iron phosphate batteries |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108711662A (en) * | 2018-05-22 | 2018-10-26 | 宁德时代新能源科技股份有限公司 | Battery pack heating device and control method |
-
2015
- 2015-10-18 CN CN201520804334.4U patent/CN205790286U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108711662A (en) * | 2018-05-22 | 2018-10-26 | 宁德时代新能源科技股份有限公司 | Battery pack heating device and control method |
| US11001165B2 (en) | 2018-05-22 | 2021-05-11 | Contemporary Amperex Technology Co., Limited | Battery pack heating apparatus and method of battery pack heating control |
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Legal Events
| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| PP01 | Preservation of patent right | ||
| PP01 | Preservation of patent right |
Effective date of registration: 20180428 Granted publication date: 20161207 |
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| PD01 | Discharge of preservation of patent | ||
| PD01 | Discharge of preservation of patent |
Date of cancellation: 20210428 Granted publication date: 20161207 |
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| PP01 | Preservation of patent right | ||
| PP01 | Preservation of patent right |
Effective date of registration: 20210428 Granted publication date: 20161207 |