CN204088524U - A kind of lithium ion start and stop power supply - Google Patents

A kind of lithium ion start and stop power supply Download PDF

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Publication number
CN204088524U
CN204088524U CN201420471196.8U CN201420471196U CN204088524U CN 204088524 U CN204088524 U CN 204088524U CN 201420471196 U CN201420471196 U CN 201420471196U CN 204088524 U CN204088524 U CN 204088524U
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CN
China
Prior art keywords
power supply
cell
stop power
lithium ion
heating
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CN201420471196.8U
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Chinese (zh)
Inventor
朱建锦
谢秋
臧思佳
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中航锂电(洛阳)有限公司
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    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02EREDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/10Energy storage using batteries

Abstract

The utility model discloses a kind of lithium ion start and stop power supply, comprise at least one battery modules, each battery modules is connected and composed by multiple cell, each battery modules correspondence is connected with a heater circuit, one group is provided with for the heating branch road for each corresponding cell heating in heater circuit, each heating branch circuit parallel connection connects, and in each heating branch road, all string is provided with one and is attached at heating film on corresponding cell housing and a temperature detect switch (TDS); Each cell is parallel with a voltage stabilizing didoe.Lithium ion start and stop power supply of the present utility model is that each cell arranges heating branch road, and each heating branch circuit parallel connection connects, separate, ensures the working temperature of each cell, solves its low-temperature adaptation sex chromosome mosaicism; Cell and voltage stabilizing didoe are connected in parallel, and utilize its stabilized voltage characteristic, are limited in the reasonable scope by the monomer battery voltage of voltage in Long-Time Service process higher than additives for overcharge protection value.

Description

A kind of lithium ion start and stop power supply

Technical field

The utility model relates to a kind of automobile start and stop power supply, especially relates to a kind of lithium ion that adopts as the automobile start and stop power supply of electrokinetic cell.

Background technology

Due to the development of ISS motion in recent years (the flame-out & of idle running starts again), higher technical requirement is proposed to automobile starting power supply, is mainly higher charge and discharge circulation life, bump electric discharge startup ability, stronger charge acceptance, more actual active volume etc.Start and stop power supply is the upgrading concept of automobile starting battery, along with improving constantly of awareness of saving energy in recent years, requires that automobile is flame-out in (engine idle operation) situations such as wait red light, saves fuel oil, but require Fast starting.Require that lithium ion battery is the most suitable for this kind, its capacity is large, impulsive discharge ability strong, but also there is poor performance at low temperatures, the technical limitations of poor safety performance.

Disclosed in number of patent application CN20100219198.4 " the automobile starting power supply of using lithium iron phosphate electrokinetic cell ", CN20110090859.2 disclosed " a kind of car emergency starting method and emergency starting power supply being applicable to low temperature environment " and CN201110161872.2 disclosed " a kind of starting power for engine " etc., but above-mentioned design all fails effectively to solve lithium-ion-power cell as the large key issue of automobile start and stop power supply two: 1) lithium-ion-power cell discharge and recharge problem at low ambient temperatures: lithium-ion-power cell at low ambient temperatures internal resistance increases, active volume and multiplying power discharging property also obviously reduce, startup ability is very easily caused to decline and normally cannot start vehicle, in addition, more seriously low temperature charging performance, namely the charging of lithium-ion-power cell low temperature easily produces and analyses lithium phenomenon, sets off an explosion.

Therefore, low-temperature adaptation sex chromosome mosaicism must being solved using lithium-ion-power cell as start and stop power supply, to keep lithium battery in the starting capability of the 500A-900A of low temperature-18 DEG C, needing to be incubated it or to heat; 2) lithium-ion-power cell has extended cycle life, can Long-Time Service, but along with the prolongation of time, lithium-ion-power cell index of conformity trend is deteriorated, may cause some cell overcharge in long-term charging process, lithium-ion-power cell is different from lead-acid battery, avoids overcharge by steam vent, lithium-ion-power cell overcharge may cause cell damage, and severe patient causes the serious accident such as thermal runaway or blast.In other lithium-ion-power cell application schemes; the overcharge of monomer lithium-ion-power cell is prevented by battery management system; traditional scheme all adopts baffle (complicated circuit board) or more complicated battery management system to solve and overcharges problem; but for cost and the comparatively strict start and stop power supply of reliability requirement, such scheme is obviously undesirable.Baffle and battery management system all exist that volume is large, poor reliability, cost are high, operating current is little (switch elements in series of baffle and battery management system, in lithium ion start and stop electric power loop, cannot bear the impulse current of 900A).

Utility model content

The purpose of this utility model is to provide a kind of lithium ion start and stop power supply, make it can use safely under cryogenic and prevent charge time to the overcharge of monomer lithium ion, improve the fail safe using lithium ion as automobile start and stop power supply, reliability.

In order to realize above object, the technical scheme that the utility model adopts is: a kind of lithium ion start and stop power supply, comprise at least one battery modules, each battery modules is connected and composed by multiple cell, each battery modules correspondence is connected with a heater circuit, one group is provided with for the heating branch road for each corresponding cell heating in described heater circuit, each heating branch circuit parallel connection connects, and in each heating branch road, all string is provided with one and is attached at heating film on corresponding cell housing and a temperature detect switch (TDS); Each cell is parallel with a voltage stabilizing didoe.

On the main circuit of described heater circuit, string is provided with hand energy-saving switch.

On the main circuit of each battery modules, string is provided with self-recovering type fast acting fuse.

Adopt red copper to arrange conduction between described cell to connect.

This power supply also comprises the shell for placing battery module, is filled with quartz sand between described battery modules and shell.

Described heating film is PTC heating film.

Described temperature detect switch (TDS) is thermostatic bimetal device.

On the main circuit of described heater circuit, string is provided with fuse.

Lithium ion start and stop power supply of the present utility model is that each cell arranges heating branch road, and each heating branch circuit parallel connection connects, separate, ensures the working temperature of each cell, solves its low-temperature adaptation sex chromosome mosaicism; Cell and voltage stabilizing didoe are connected in parallel, and utilize its stabilized voltage characteristic, are limited in the reasonable scope by the monomer battery voltage of voltage in Long-Time Service process higher than additives for overcharge protection value.

Adopt PTC heating film to heat the lithium ion start and stop power supply in low temperature environment, PTC heating film on lithium-ion power battery shell, ensures that the heat conduction produced is inner to battery core by the gluing note of heat conduction to greatest extent.Temperature detect switch (TDS) adopts closed type structure thermostatic bimetal device, and temperature keeps normally off lower than during critical point, the work of heating branch road; Temperature disconnects higher than normally-closed contact during critical point, heating leg open.

The design of renewable type fast acting fuse uses the fail safe, the reliability that improve start and stop power supply.

Arranging hand energy-saving switch avoids start and stop power supply to be in PTC heater circuit long-time heating in low temperature environment for a long time, consumes the energy of start and stop power supply excessively.

Accompanying drawing explanation

Fig. 1 is the circuit theory diagrams of the utility model lithium ion start and stop power supply embodiment.

Embodiment

Below in conjunction with accompanying drawing and specific embodiment, the utility model is described further.

Be illustrated in figure 1 the circuit theory diagrams of the utility model lithium ion start and stop power supply embodiment, this start and stop power supply comprises at least one battery modules, the present embodiment adopts 4 lithium iron phosphate dynamic battery series connection formation battery modules to be described as the energy storage medium of start and stop power supply, is respectively G1, G2, G3, G4.G1-G4 series connection is the battery modules of 12V, and has certain design capacity, and certainly, the battery modules of series connection increases the capacity of start and stop power supply by parallel way, to meet the instructions for use of different automobile types.

The performance index such as lithium iron phosphate dynamic battery energy density, cycle life, self-discharge rate are obviously better than traditional lead-acid battery, and its security performance is better than other lithium-ion-power cells in the right side simultaneously, is a kind of ideal start and stop power supply.

Each battery modules is connected and composed by multiple cell, each battery modules correspondence is connected with a heater circuit, one group is provided with for the heating branch road for each corresponding cell heating in heater circuit, each heating branch circuit parallel connection connects, and in each heating branch road, all string is provided with one and is attached at heating film on corresponding cell housing and a temperature detect switch (TDS); Heater circuit adopts 12V start and stop power supply to power.For Fig. 1, the heating film of the present embodiment is PTC heating film, and temperature detect switch (TDS) adopts thermostatic bimetal device, is controlled the break-make of heating circuit by the temperature of perception surrounding medium.PTC heating film passes through the gluing note of heat conduction on the G1-G4 housing of corresponding lithium iron phosphate dynamic battery; E1-E4 forms 4 heating branch roads in parallel, works alone, is controlled respectively by thermostatic bimetal device S1-S4.PTC heating film is semistor, has good temperature-limiting character, and resistance rises along with temperature and becomes large gradually, automatically reduces heating power and carries out limit temperature, avoid electrolyte decomposition risk, final formation temperature balance.Balance point is designed to the minimum adaptive temperature point of lithium iron phosphate dynamic battery in this example, saves heating electric energy used to greatest extent.Thermostatic bimetal device S1-S4 is closed type structure, and temperature keeps normally off lower than during critical point, the work of heating branch road; Temperature disconnects higher than normally-closed contact during critical point, heating leg open.

On the main circuit of heater circuit, string is provided with and makes start and stop power supply be in the hand energy-saving switch S 5 of dead status in prolonged cold environment.This switch remains closed in normal state always, keep the long term thermal of heater circuit for state, only in vehicle Long-time Shut-down (more than month) and under being in cold environment, electric energy is consumed for avoiding heater circuit long-term work, triggering S5 can disjunction heating circuit, and heater circuit is temporarily opened a way.Before start and stop power supply uses, reset hand energy-saving switch S 5 also keeps a period of time.In addition, also in the main circuit of heater circuit, string establishes a fuse F2, ensures the trouble free service of circuit.

In addition, lithium iron phosphate dynamic battery monomer G1-G4 is shunt regulator diode V1-V4 respectively, and voltage stabilizing didoe has the unilateal conduction characteristic of general-purpose diode, but it is operated in reverse breakdown state.When reverse voltage reaches certain numerical value, reverse current increases suddenly, and voltage stabilizing didoe enters breakdown region, but it does not damage but enters normal operating conditions.After voltage stabilizing didoe enters this operating state, even if when reverse current in very large range changes, the reverse voltage at voltage stabilizing didoe two ends also can keep substantially constant, Here it is voltage stabilizing didoe stabilized voltage characteristic.In this programme, voltage stabilizing didoe model is 1N5335BRLG, burning voltage Vz3.9V, Iz320mA.Along with the Long-Time Service of start and stop power supply, indivedual lithium ion power monomer voltage may be there is more than 3.9V, the potential safety hazard of therefore overcharge.In the case; voltage stabilizing didoe reverse breakdown, overcharge cell batteries forms loop by voltage stabilizing didoe, slowly consumes electric energy; reduce monomer battery voltage, in Long-Time Service process, voltage limits in the reasonable scope higher than the monomer battery voltage of additives for overcharge protection value.In view of overcharge process is a long-term process slowly occurred, use low power voltage stabilizing didoe effectively can limit monomer battery voltage.

Adopt red copper to arrange series conductor between G1-G4 to connect, red copper row conductance is high, internal resistance is little, can significantly improve the cold-starting ability of start and stop power supply and continuous starting capability.Connect in start and stop electric power main circuit renewable type fast acting fuse F1, and when start and stop power supply short-circuited outside or reversal connection, F1 can quick fuse, to protect start and stop power supply.After external short circuit or reversal connection Failure elimination, F1 can recover conducting through suitable cooling.

Start and stop power supply of the present utility model also comprises the ABS shell for placing battery module, is filled with quartz sand in the gap of battery modules and shell.Quartz sand has good thermal insulation, thermal stability, fire extinguishing can form uniform gap.The thermal insulation that quartz sand is good effectively can reduce the thermal loss of start and stop power supply in low temperature environment, provides the heat efficiency of PTC heater circuit.In addition, the even slight gap that quartz sand particle is formed can be that lithium-ion-power cell internal pressure is too high provides pressure release space, keeps the safety valve function of lithium-ion-power cell.Lithium-ion-power cell module is completely enclosed within inside by ABS housing, exports electric energy by Special wiring post.

Above embodiment only understands core concept of the present utility model for helping; the utility model can not be limited with this; for those skilled in the art; every according to thought of the present utility model; the utility model is modified or equivalent replacement; any change done in specific embodiments and applications, all should be included within protection range of the present utility model.

Claims (8)

1. a lithium ion start and stop power supply, comprise at least one battery modules, each battery modules is connected and composed by multiple cell, it is characterized in that: each battery modules correspondence is connected with a heater circuit, one group is provided with for the heating branch road for each corresponding cell heating in described heater circuit, each heating branch circuit parallel connection connects, and in each heating branch road, all string is provided with one and is attached at heating film on corresponding cell housing and a temperature detect switch (TDS); Each cell is parallel with a voltage stabilizing didoe.
2. lithium ion start and stop power supply according to claim 1, is characterized in that: on the main circuit of described heater circuit, string is provided with hand energy-saving switch.
3. lithium ion start and stop power supply according to claim 1, is characterized in that: on the main circuit of each battery modules, string is provided with self-recovering type fast acting fuse.
4. lithium ion start and stop power supply according to claim 1, is characterized in that: adopt red copper to arrange conduction between described cell and connect.
5. lithium ion start and stop power supply according to claim 1, is characterized in that: this power supply also comprises the shell for placing battery module, is filled with quartz sand between described battery modules and shell.
6. lithium ion start and stop power supply according to claim 1, is characterized in that: described heating film is PTC heating film.
7. lithium ion start and stop power supply according to claim 1, is characterized in that: described temperature detect switch (TDS) is thermostatic bimetal device.
8. the lithium ion start and stop power supply according to claim 1 ~ 7 any one, is characterized in that: on the main circuit of described heater circuit, string is provided with fuse.
CN201420471196.8U 2014-08-20 2014-08-20 A kind of lithium ion start and stop power supply CN204088524U (en)

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Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104901393A (en) * 2015-06-22 2015-09-09 罗民雄 Method and circuit for controlling charging voltage of batteries in battery series connection charging circuit
CN104901384A (en) * 2015-06-22 2015-09-09 罗民雄 A method and circuit using a charging IC with a fixed charging voltage scope to charge cascaded cells of a random number
CN105070976A (en) * 2015-07-07 2015-11-18 辽宁凯信新能源技术有限公司 Ultralow temperature lithium battery pack for electric automobile
CN105449298A (en) * 2016-01-13 2016-03-30 深圳先进储能材料国家工程研究中心有限公司 Low-temperature high-power output auxiliary device for portable battery pack
CN107799849A (en) * 2017-09-26 2018-03-13 银隆新能源股份有限公司 Battery bag heating system and electric car

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104901393A (en) * 2015-06-22 2015-09-09 罗民雄 Method and circuit for controlling charging voltage of batteries in battery series connection charging circuit
CN104901384A (en) * 2015-06-22 2015-09-09 罗民雄 A method and circuit using a charging IC with a fixed charging voltage scope to charge cascaded cells of a random number
CN105070976A (en) * 2015-07-07 2015-11-18 辽宁凯信新能源技术有限公司 Ultralow temperature lithium battery pack for electric automobile
CN105449298A (en) * 2016-01-13 2016-03-30 深圳先进储能材料国家工程研究中心有限公司 Low-temperature high-power output auxiliary device for portable battery pack
CN105449298B (en) * 2016-01-13 2018-02-23 深圳先进储能材料国家工程研究中心有限公司 A kind of portable battery pack low temperature high-power output servicing unit
CN107799849A (en) * 2017-09-26 2018-03-13 银隆新能源股份有限公司 Battery bag heating system and electric car

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