CN201311957Y - Battery pack module - Google Patents

Battery pack module Download PDF

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Publication number
CN201311957Y
CN201311957Y CNU2008202125232U CN200820212523U CN201311957Y CN 201311957 Y CN201311957 Y CN 201311957Y CN U2008202125232 U CNU2008202125232 U CN U2008202125232U CN 200820212523 U CN200820212523 U CN 200820212523U CN 201311957 Y CN201311957 Y CN 201311957Y
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CN
China
Prior art keywords
battery module
circulation passage
fluid media
medium
module according
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.)
Expired - Lifetime
Application number
CNU2008202125232U
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Chinese (zh)
Inventor
朱建华
郑卫鑫
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BYD Co Ltd
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BYD Co Ltd
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Publication date
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Priority to CNU2008202125232U priority Critical patent/CN201311957Y/en
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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

A battery pack module comprises a temperature adjusting system and a plurality of single batteries or a plurality of battery packs. The temperature adjusting system comprises a pump, a temperature adjuster, a flow channel and fluid media. The fluid media is filled in the flow channel, and the flow channel is connected with a flow inlet of the pump and further connected with a flow outlet of the pump, thereby forming a circulation loop of the fluid media. The temperature adjuster is used to heat or cool the fluid media in the flow passage and to heat or radiate the single batteries or the battery packs arranged surrounding the circulation loop. The temperature adjusting system of the battery pack can provide constant and high-efficient temperature adjustment for the battery pack.

Description

Battery module
Technical field
The present invention relates to battery pack, relate in particular to the humidity control system of battery pack.
Background technology
Battery can produce a large amount of heats in charge and discharge process, this heat not only can influence the performance of battery, more seriously, when heat accumulation after to a certain degree, cause thermal runaway possibly and explode.For the lithium ion battery group that automobile is used, heat radiation is very important.In the prior art, adopt external circulation mode that battery pack is dispelled the heat usually, for example by blowing the cold air from the battery module outside to battery pack, and the air after the battery pack of will flowing through is discharged into the battery module outside, just forms systemic circulation with the outside.This radiating mode can be brought the moisture in the extraneous air into battery module usually, is unfavorable for the steady operation of battery pack.
In addition, some batteries, especially electrokinetic cell may be worked under low temperature environment as required.When working under low temperature environment, the service behaviour of battery in low temperature environment is relatively poor, and for example, the optimum working temperature of lithium battery is at 15-35 ℃.When battery pack is lower than 0 ℃ of work, because increasing, the viscosity of electrolyte make ion motion be subjected to big resistance, diffusivity also reduces, therefore the charge-discharge performance and the cycle life of battery can be subjected to very big influence, the charging performance of battery particularly can only fill the 50-60% capacity as battery-20 ℃ the time.Therefore, when low temperature is worked down, need carry out low-temperature heat to battery pack.
Summary of the invention
For addressing the above problem, need a kind of humidity control system that when considering the battery pack heat radiation, also need to consider to the battery pack low-temperature heat.
The invention provides a kind of battery module, this module comprises humidity control system and a plurality of cell or a plurality of battery pack, described humidity control system comprises pump, thermoregulator, circulation passage and fluid media (medium), described fluid media (medium) is filled in the described circulation passage, described circulation passage is connected with the inflow entrance of described pump, and be connected with the flow export of described pump, thereby form the circulation circuit of described fluid media (medium), described thermoregulator is used for making the described fluid media (medium) heating or the cooling of described circulation passage, with to being arranged on described cell or battery pack heating or the heat radiation around the described circulation circuit.
Described thermoregulator can be as required and optionally to described fluid media (medium) heating or cooling, with the temperature of regulating cell group.Described fluid media (medium) can adopt liquid or gas, because the present invention is an inner circulation structure, can not bring the moisture of outside into battery, and the assurance battery is worked under constant environment.In addition, the inlet that described pump of the present invention is circulation also is the outlet of circulation, can effectively improve the utilance of heat.
Description of drawings
Fig. 1 is the schematic diagram of a kind of execution mode of battery module of the present invention;
Fig. 2 is the schematic diagram of the another kind of execution mode of battery module of the present invention.
Embodiment
Figure 1 shows that the execution mode of a kind of battery module of the present invention, wherein, battery module of the present invention comprises a plurality of cells 6 and humidity control system, and this humidity control system comprises pump 1, thermoregulator 2, circulation passage 3 and fluid media (medium).Fluid media (medium) is filled in the circulation passage 3, one end and the pump 1 of circulation passage 3 are connected in inflow entrance 4, and extend through thermoregulator 2, the other end of circulation passage 3 and pump 1 are connected in flow export 5, fluid media (medium) flows along direction shown in the arrow in circulation passage 3, thereby form the inner circulation structure of fluid media (medium), fluid media (medium) is extruded by pump 1 pressurization, after carrying out adjustment, passes through by thermoregulator 2 circulation passage 3, thermoregulator 2 is used for making the fluid media (medium) heating or the cooling of circulation passage 3, to heat or heat radiation being arranged on described circulation circuit cell 6 on every side.
As shown in Figure 1, cell 6 is arranged on around the circulation passage 3, preferably is arranged in the circulation circuit institute area surrounded of circulation passage 3 formations, and makes the space between each cell 6 keep electric insulation, to obtain best adjustment effect.The inventor discovers that in large-sized battery such as electrokinetic cell, when charging and discharge, the charging and discharging currents of battery is very big, causes the variations in temperature of entire cell easily.And flowing to the battery two ends in the electric routing battery middle part is the process of a current concentration, and promptly the closer to the direction at battery two ends, current density is high more, and temperature is also just high more.Especially on electrode terminal, because the area of electrode terminal is less relatively, and be the metal material that generates heat easily, so temperature being the highest on the electrode terminal, is the key position of battery heat radiation, also is the important step of battery security.The lug junction of electrode, electrode terminal junction all are physical connections in addition, and the impedance of its impedance ratio electrochemical reaction is bigger, and this also is a very high main cause of electrode terminal temperature.Therefore, near heat-conduction component (the electrode fin of heat or electrode terminal itself as conducting electrode) can be set at the electrode tip of cell 6, and this heat-conduction component drawn and make its at least a portion sealing (as injection moulding) is set in circulation passage 3 inside, make fluid media (medium) to directly cooling or the heating of these parts.
In addition, circulation passage 3 can form a plurality of circulation circuits, in the execution mode as shown in Figure 1, pump 1 comprises an inflow entrance 4 and a plurality of flow export 5, circulation passage 3 comprises a fluid media (medium) inflow direction and a plurality of flow of fluid medium outgoing direction (direction of arrow among Fig. 1), thereby constitutes a plurality of circulation circuits; In the execution mode as shown in Figure 2, pump 1 comprises a plurality of inflow entrances 4 and a plurality of flow export 5, and circulation passage 3 comprises a plurality of fluid media (medium) inflow directions and a plurality of flow of fluid medium outgoing direction, thereby constitutes a plurality of circulation circuits.
In addition, fluid media (medium) can be selected liquid or gas, requires fluid insulation, non-corrosiveness when using the liquid fluid medium, preferably uses fluid liquid media such as silicone oil.Gas can be selected the higher gas of hot memory space or be doped with the air of heat absorption foam beads.
According to different operational environments, make thermoregulator 2 can be used for the heat radiation or the low-temperature heat of battery pack.Thermoregulator 2 can be arranged in the circulation circuit of circulation passage 3 formations, and comprises cooling package and heating component.Preferably, described cooling package and heating component are controllable constant-temperature cooling package and heating component, battery pack is provided constant working temperature.In addition, cooling package and heating component can be arranged in the circulation passage 3, can also be separately positioned on the inside and the outer wall of the pipeline of circulation passage 3, perhaps be separately positioned on the outer wall of pipeline of circulation passage 3, with fluid media (medium) cooling or heating flowing through in the circulation passage 3.In the present embodiment, thermoregulator 2 is arranged near the inflow entrance of pump 1, and cooling package can be condenser 8 (as the condenser of air-conditioning), and heating component can be coil heats part or ceramic heat part 9.
Can be by manually selecting heating component or cooling package work.In addition, described battery module can also comprise temperature sensor and control starter (not shown), temperature sensor (can be arranged on the electrode terminal of cell) records the temperature of battery module and transmits signal to the control starter, the control starter is according to the running of the described humidity control system of signal controlling that receives, select cooling package or heating component work, thereby automatically to battery pack heat radiation or heating.Preferably, temperature sensor can be a thermistor type sensors, and the control starter can be microprocessor or PLC, the control starter can be arranged on the thermoregulator 2.
To introduce the course of work of the humidity control system of battery pack of the present invention in detail below.
Discharging and recharging or working temperature when being higher than predetermined temperature as 55 ℃ of the battery module that records when temperature sensor, the control starter makes described humidity control system starting, and makes condenser 8 work in the thermoregulator 2.Described humidity control system is used for the heat radiation of battery pack.Fluid media (medium) enters inflow entrance 4 through the pressurization of pump 1, and longshore current circulation passage 3 flows in the thermoregulators 2, and the running of condenser 8 reduces the temperature of fluid media (medium).After the cryogen medium flows out from thermoregulator 2, longshore current circulation passage 3 flows, and carry out heat exchange (when the electrode fin of cell 6 is arranged in the circulation passage 3 with the cell 6 that is arranged on around the circulation passage 3, fluid media (medium) can also be directly and the electrode fin carry out heat exchange), take away the heat that battery distributes.The process heat exchange has also absorbed after the unnecessary heat, the circulation in flow export 5 flows back to pump 1 formation of fluid media (medium) longshore current circulation passage 3.Subsequently, fluid media (medium) is pressurizeed once more by pump 1 and flows into thermoregulator 2, and through condenser 8 coolings, longshore current circulation passage 3 flows and continues the heat radiation circulation.
Similarly, when the working temperature of the battery module that records when temperature sensor is lower than predetermined temperature as-10 ℃, the control starter makes described humidity control system starting, and makes ceramic heat part 9 work in the thermoregulator 2, and described humidity control system is used for the low-temperature heat of battery pack.Fluid media (medium) enters inflow entrance 4 through the pressurization of pump 1 and longshore current circulation passage 3 flows in the thermoregulators 2, the running heating fluid medium of ceramic heat part 9.After the fluid media (medium) of heating flowed out from thermoregulator 2, longshore current circulation passage 3 flowed, and carried out heat exchange with the cell 6 that is arranged on around the circulation passage 3, to low temperature down the battery pack of work carry out low-temperature heat.Fluid media (medium) longshore current circulation passage 3 circulation in flow export 5 flows back to pump 1 formation through heat exchange.Subsequently, fluid media (medium) is pressurizeed once more by pump 1 and flows into thermoregulator 2, and through 9 heating of ceramic heat part, longshore current circulation passage 3 flows and continues heat cycles.
Because described humidity control system has formed interior circulation, all parts all are encapsulated in the battery module, when fluid media (medium) is gas, can avoid bringing the moisture of outside into battery module, therefore, can keep battery pack to work under constant environment.In addition, the fluid media (medium) of a circulation is directly used in next circulation, can reduces the heating or the cooling of next circulation time fluid medium, make that the interior circulation pattern efficiency of described humidity control system is higher.
In order further to improve the recycling of energy, can be by the uniform distribution of temperature field of parameters optimization with circulation in guaranteeing as much as possible.Preferably, can be by increasing the flow velocity of fluid media (medium), the heat exchange amount of fluid media (medium) and battery pack during with the minimizing single cycle.During the using gases fluid media (medium), can also preferably improve the hot memory space of gas, thereby guarantee the uniform distribution of temperature field of circulation by the mode of using big gas of hot memory space or doping foam beads.More preferably, the temperature difference at inflow entrance 4 and flow export 5 places can be controlled at 2~3 ℃, so that the heat exchange amount basically identical between fluid media (medium) and each cell 6, thereby reach temperature adjustment the best of battery pack.
Circulation passage 3 can be whole, and the size of this passage can design according to the demand of heat radiation or low-temperature heat.Wherein, the insulated with material that circulation passage 3 is used, in the time of in the electrode fin is arranged on circulation passage 3, heat exchange is mainly carried out in circulation passage 3, therefore can select the non-conductor material as heat such as PPS (polyphenylene sulfide), PPO (polyphenylene oxide), PEEK (polyether-ether-ketone).Preferably, these materials have little foaming structure, thus the cold air unnecessary loss when heat can stop low-temperature heat better time the or heat radiation.
In addition, circulation passage 3 can also be arranged on the circulation passage that forms entire cell bag 10 between a plurality of battery pack as shown in Figure 2.In this embodiment, the connected mode of the humidity control system of the connection of each parts and single battery group likeness in form, difference only is, a plurality of battery pack are arranged on around the circulation passage 3.That is to say that this humidity control system comprises a plurality of battery pack 7.Fluid media (medium) flows out through the pressurization of pump 1 (not shown), carries out adjustment and by circulation passage 3, is arranged on the temperature of circulation passage 3 battery pack 7 on every side with adjusting through thermoregulator 2 (not shown).As shown in Figure 2, circulation passage 3 comprises a plurality of circulation circuits, and the two ends of each circulation circuit are connected with pump 1 respectively, thereby forms the loop structure of fluid media (medium).Each battery pack 7 is arranged in the circulation circuit institute area surrounded of circulation passage 3 formation, and keeps the space electric insulation between each battery pack 7.
Can be by the humidity control system of battery module of the present invention, according to different needs battery module is dispelled the heat or low-temperature heat, and effectively utilize energy, saved the space,, satisfied the requirement of high energy efficiency and space availability ratio simultaneously for electrokinetic cell.

Claims (13)

1. battery module, this module comprises humidity control system and a plurality of cell or a plurality of battery pack, it is characterized in that, described humidity control system comprises pump, thermoregulator, circulation passage and fluid media (medium), described fluid media (medium) is filled in the described circulation passage, described circulation passage is connected with the inflow entrance of described pump, and be connected with the flow export of described pump, thereby form the circulation circuit of described fluid media (medium), described thermoregulator is used for making the described fluid media (medium) heating or the cooling of described circulation passage, with to being arranged on described cell or battery pack heating or the heat radiation around the described circulation circuit.
2. according to the battery module shown in the claim 1, it is characterized in that described pump is provided with at least one inflow entrance and at least one flow export, described circulation passage can form a plurality of circulation circuits.
3. battery module according to claim 2 is characterized in that, described cell or battery pack are arranged on by in the described circulation circuit area surrounded.
4. battery module according to claim 3 is characterized in that the electrode tip of described cell or battery pack is provided with heat-conduction component, and at least a portion of this heat-conduction component is positioned at described circulation passage.
5. battery module according to claim 1 is characterized in that described thermoregulator comprises heating component and cooling package.
6. battery module according to claim 5 is characterized in that, described heating component is the ceramic heat part, and described cooling package is a condenser.
7. battery module according to claim 5 is characterized in that, described heating component and cooling package are separately positioned in the described circulation passage and/or on the described circulation passage outer wall.
8. battery module according to claim 5, it is characterized in that, described battery module also comprises temperature sensor and control starter, and the temperature of the described battery module that described control starter records according to described temperature sensor is controlled the running of described humidity control system.
9. battery module according to claim 1 is characterized in that, described fluid media (medium) is liquid or gas.
10. battery module according to claim 9 is characterized in that, described fluid media (medium) is a silicone oil.
11. battery module according to claim 9 is characterized in that, described fluid media (medium) can or be doped with the air of heat absorption foam beads for the big gas of hot memory space.
12. battery module according to claim 4 is characterized in that, described circulation passage is formed by the non-conductor of the heat of insulation.
13. battery module according to claim 12 is characterized in that, the material of described circulation passage has little foaming structure.
CNU2008202125232U 2008-10-10 2008-10-10 Battery pack module Expired - Lifetime CN201311957Y (en)

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Application Number Priority Date Filing Date Title
CNU2008202125232U CN201311957Y (en) 2008-10-10 2008-10-10 Battery pack module

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Application Number Priority Date Filing Date Title
CNU2008202125232U CN201311957Y (en) 2008-10-10 2008-10-10 Battery pack module

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Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101894969A (en) * 2010-07-26 2010-11-24 湖南科霸汽车动力电池有限责任公司 Power battery pack energy pack
CN102668203A (en) * 2009-11-10 2012-09-12 Sb锂摩托有限公司 Temperature control method and battery system
CN101728595B (en) * 2008-10-10 2012-10-17 比亚迪股份有限公司 Battery pack
CN103219831A (en) * 2013-03-22 2013-07-24 天津市松正电动汽车技术股份有限公司 Air-cooling motor and new energy automobile battery heating device
CN104752788A (en) * 2015-03-16 2015-07-01 金龙联合汽车工业(苏州)有限公司 Temperature adjusting device of electric vehicle battery box

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101728595B (en) * 2008-10-10 2012-10-17 比亚迪股份有限公司 Battery pack
CN102668203A (en) * 2009-11-10 2012-09-12 Sb锂摩托有限公司 Temperature control method and battery system
CN102668203B (en) * 2009-11-10 2015-05-06 罗伯特·博世有限公司 Temperature control method and battery system
US9379392B2 (en) 2009-11-10 2016-06-28 Robert Bosch Gmbh Temperature control method and battery system
CN101894969A (en) * 2010-07-26 2010-11-24 湖南科霸汽车动力电池有限责任公司 Power battery pack energy pack
CN103219831A (en) * 2013-03-22 2013-07-24 天津市松正电动汽车技术股份有限公司 Air-cooling motor and new energy automobile battery heating device
CN104752788A (en) * 2015-03-16 2015-07-01 金龙联合汽车工业(苏州)有限公司 Temperature adjusting device of electric vehicle battery box
CN104752788B (en) * 2015-03-16 2017-04-19 金龙联合汽车工业(苏州)有限公司 Temperature adjusting device of electric vehicle battery box

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Granted publication date: 20090916

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