CN2665947Y - Power lithium ion secondary battery - Google Patents
Power lithium ion secondary battery Download PDFInfo
- Publication number
- CN2665947Y CN2665947Y CNU032743122U CN03274312U CN2665947Y CN 2665947 Y CN2665947 Y CN 2665947Y CN U032743122 U CNU032743122 U CN U032743122U CN 03274312 U CN03274312 U CN 03274312U CN 2665947 Y CN2665947 Y CN 2665947Y
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- CN
- China
- Prior art keywords
- battery pack
- cooling system
- power lithium
- rechargeable battery
- control circuit
- 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
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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
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/50—Manufacturing or production processes characterised by the final manufactured product
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- Battery Mounting, Suspending (AREA)
Abstract
A dynamical lithium-ion secondary battery pack comprises a battery pack composed of single batteries and an encapsulating shell, and the utility model is characterized in that: a cooling system is arranged at the periphery of the battery pack, the cooling system comprises a semiconductor refrigerator and a control circuit that is connected with the semiconductor refrigerator, wherein, a face where the semiconductor refrigerator is close to the battery pack is a refrigeration face and the other face is a heat dissipation face, wherein the refrigeration can be provided to the battery pack by controlling the refrigeration face through the control circuit while the heat dissipation can be provided through the heat dissipation face. The temperature of the dynamical battery pack can be rapidly decreased by adopting the mode of semiconductor refrigeration so as to ensure the dynamical battery pack to have the advantages of low energy consumption, high energy, low price, good security, long service life and no pollution, etc.
Description
[technical field]
The utility model relates to a kind of lithium ion secondary batteries, more particularly relates to the power lithium-ion rechargeable battery group of a kind of use at aspects such as motor vehicle, big-and-middle-sized communication apparatus.
[background technology]
In recent years, because environmental protection and requirements of saving energy, people press for and seek high efficiency and clean power source, and electrokinetic cell then is a kind of reasonable selection.
At present, had in the middle of multiple electrokinetic cell developing and developing, for example lead-acid battery, nickel-cadmium cell, Ni-MH battery, sodium-sulphur battery, zinc-air cell, flying wheel battery, fuel cell, lithium ion battery or the like.Wherein, zinc-air cell, flying wheel battery, fuel cell, lithium ion battery all are considered to the optimal selection as the electrokinetic cell development.
Employed positive electrode active materials must be able to provide a large amount of and can freely take off the lithium ion of embedding and embedding in the lithium rechargeable battery, and studying more at present is the transition metal oxide of rich lithium---cobalt acid lithium (LiCoO2), lithium nickelate (LiNiO2), LiMn2O4 (LiMn2O4) etc.Wherein, at present commercial cobalt acid lithium demonstrates more stable discharge voltage and higher specific capacity, but exists a lot of defectives in commercialization is produced: at first be the shortage problem of cobalt resource, can adopt cobalt resource content at present in the world and only be 8,300,000 tons; Next is a price problem, and the costing an arm and a leg of cobalt is 20 times of price of nickel, is 40 times of manganese price; In addition, cobalt acid lithium is more far short of what is expected than LiMn2O4 on security performance, and the decomposition temperature of its charging afterproduct will be lower than the decomposition temperature of LiMn2O4 charging afterproduct, and on this high power battery of electrokinetic cell, its potential safety hazard is more troubling.Also there are many problem demanding prompt solutions in the synthetic quite difficulty of lithium nickelate positive electrode aspect high capacity, and lithium nickelate charging afterproduct decomposition temperature is minimum, can't be applied on the high-power drive pond substantially.As the optimal selection of power lithium-ion rechargeable battery positive electrode active materials, LiMn2O4 has that specific energy is higher, preparation easily, low, the security performance of cost, advantage such as pollution-free.
The shortcoming of manganate cathode material for lithium is that high-temperature behavior is poor, when temperature surpassed 60 ℃, to being the circulation of resetting of the battery of positive electrode with the LiMn2O4, its capacity is decline rapidly, after surpassing 50 charge and discharge cycles, its discharge capacity will drop to below 80% of initial discharge capacity.In order to address this problem, people have adopted several different methods, for example, change the LiMn2O4 synthetic method, LiMn2O4 is carried out cation and/or anion doped and lithium manganate particle carried out processing such as surface coating.These processing methods make moderate progress to the high-temperature behavior of lithium manganate material, but there is not thorough head it off, and these methods or because preparation process is loaded down with trivial details, strict etc. reason can't be applied to suitability for industrialized production, or be cost with the specific discharge capacity that reduces material.
Since manganate cathode material for lithium at high temperature the life-span very poor, can allow with the LiMn2O4 is that the battery of positive electrode active materials breaks away from hot environment, thereby crosses this problem.And the heat that the greatest problem of power lithium-ion rechargeable battery produces in the charge and discharge process just is too much.On electric bicycle, mixed power vehicle and electric automobile, only use blower fan to carry out air-cooled at present to power battery pack.Utilize wind cooling temperature lowering, temperature is reduced to ambient temperature to multipotency near, also enough big power must be arranged.In addition, owing to lack control system, no matter whether too high the power battery pack temperature is, blower fan moves always in the method for using at present, causes energy waste.Therefore, at present the method that power battery pack is carried out wind cooling temperature lowering has not only consumed lot of energy, does not also reach gratifying effect.
[utility model content]
The purpose of this utility model is to provide a kind of power lithium-ion rechargeable battery group, it can effectively stablize the temperature of power battery pack in charge and discharge process, guaranteeing the activity of electrode material, so have that low energy consumption, high-energy, low price, security performance are good, long service life, advantage such as pollution-free.
The purpose of this utility model is achieved through the following technical solutions:
A kind of power lithium-ion rechargeable battery group, comprise the battery pack that constitutes by cell and the shell of encapsulation, it is characterized in that: be equipped with a cooling system in the battery pack outer periphery, described cooling system comprises a semiconductor refrigerator and a coupled control circuit, wherein, the one side that semiconductor cooler relies on battery pack is a chill surface, and another side is a radiating surface.
Cooling system in the above-mentioned design further is improved to:
Described cooling system also comprises a cool guiding block, and the chill surface of described semiconductor cooler is coated to be close to behind the heat conductive silica gel and is connected on the cool guiding block.
Described cooling system also comprises a blower fan, and it is connected with control circuit, and air outlet is towards cool guiding block.
Described cooling system also comprises a radiating block, and the radiating surface of described semiconductor cooler is coated to be close to behind the heat conductive silica gel and is connected on the radiating block.
Described cooling system also comprises a thermistor, and it is installed in the cell surface, and is connected with control circuit.
Described cell, electrokinetic cell assembly housing, blower fan and cool guiding block leave the space each other, the size in space is controlled between 5mm～20mm.
Advantage of the present utility model is:
Reduce the power battery pack temperature rapidly by the mode that adopts semiconductor refrigerating, and temperature can be reduced to below the ambient temperature, in addition, control circuit can be controlled semiconductor cooler and whether blower fan turns round according to the height of power battery pack temperature, effectively stablize the temperature of power battery pack in charge and discharge process, guaranteeing the activity of electrode material, so make that this power battery pack has that low energy consumption, high-energy, low price, security performance are good, long service life, advantage such as pollution-free.
[description of drawings]
Fig. 1 is the utility model power lithium-ion rechargeable battery group schematic diagram.
[embodiment]
Below the utility model is made further instruction.
The reference numeral explanation:
The 1-semiconductor cooler; The 2-cool guiding block; The 3-radiating block; The 4-control circuit;
The 5-blower fan; The 6-thermistor; The 7-cell; The 8-airflow direction.
The cell 7 here is that to adopt with LiMn2O4 (LiMn2O4) be positive electrode active materials, and Delanium is a negative active core-shell material, the lithium rechargeable battery that is prepared from according to method in common, and a plurality of cells 7 are combined into power battery pack.
Certainly, it is positive active material that described cell can also adopt to contain the lithium that can embed and deviate from lithium ion and the composite oxides of transition metal, better choice is the material that contains LiMn2O4 or its growth, with chemical formulation be: LiMn2O4 or LiMn2-xMxO4, LiMnO2 or LiMn1-yMyO2, wherein 0≤x or y≤0.5.
Employing is a negative electrode active material to contain the material with carbon element that can embed and deviate from lithium ion, and better choice is native graphite, Delanium or these graphite product after surface coverage has unsetting carbon modification.
Describe a kind of embodiment of the present utility model below in detail.
See also Fig. 1, the utility model power lithium-ion rechargeable battery group, comprise the battery pack that constitutes by cell and the shell of encapsulation, and its battery pack outer periphery is equipped with a cover cooling system, wherein, this cooling system comprises semiconductor cooler 1, cool guiding block 2, radiating block 3, control circuit 4, blower fan 5 and thermistor 6.
Semiconductor cooler 1 is connected with control circuit 4, and is carried out the control of open and close by the latter.In installation process, its one side that relies on battery pack is a chill surface, and another side is a radiating surface, the chill surface of semiconductor cooler 1 is to cling to after coating heat conductive silica gel on the cool guiding block 2, and cling on the radiating block 3 after hot side coated heat conductive silica gel, thereby being connected and fixed, cool guiding block 2, semiconductor cooler 1 and radiator piece 3 be one.Like this, when its operate as normal, when promptly having the battery pack direct current to pass through, can absorb heat at chill surface, and in the radiating surface heat release.
Cool guiding block 2 can use heat conduction good metal piece, as copper billet, aluminium block or the like, when its role is to increase the cooling area, prevents the appearance of air setting water.
Radiating block 3 can use the thermal conductivity good metal, and increases the contact area of itself and air as far as possible, its role is to the heat that semiconductor cooler 1 produces is distributed, thereby guarantees its normal operation.
Blower fan 5 is connected on the control circuit 4, its role is to cold air is distributed in the whole power battery group, therefore the direction of blower fan 5 air-out will be aimed at cool guiding block 2.In addition, 8 be airflow direction among Fig. 1.
Thermistor 6 is used to measure battery pack temperature.Measure for guaranteeing accuracy, thermistor 6 is placed in the battery cell surface away from blower fan 5, and is connected on the control circuit 4, the battery temperature signal that collects with transmission.
The above-mentioned semiconductor cooler 1 and the operation of blower fan 5 are controlled by control circuit 4.The temperature that records battery pack when thermistor 6 is above behind the design temperature, and control circuit 4 can start semiconductor cooler 1 and blower fans 5; After thermistor 6 recorded temperature and is lower than design temperature, control circuit 4 will at first stop the operation of semiconductor cooler 1, stopped the operation of blower fan 5 after 30～60 seconds.Stop earlier stopping blower fan 5 again behind the semiconductor cooler 1 and can avoid the inner local overcooling of power battery pack, and condensation goes out the generation that airborne water causes phenomenon such as power battery pack short circuit.As long as can realize above-mentioned functions, the control circuit 4 of various models can use in the utility model, does not elaborate at this.
In addition, different according to battery pack model and size can suitably be adjusted the model and the quantity of semiconductor cooler 1 in this cooling system, blower fan 5, to guarantee to have better refrigeration.
And this cooling system can also can be powered by other secondary cell (group) by power battery pack self power supply.Because the reduction of ambient temperature can improve the power battery pack discharge capacity, as long as select suitable semiconductor cooler, blower fan model and quantity, just the energy that is consumed can be controlled at because temperature reduces below the extra discharge energy that brings to power battery pack, that is to say that the increase of cooling system can't reduce the output of power battery pack energy.
Be noted that between the battery cell in addition, between battery cell and the electrokinetic cell assembly housing, all leave the space between blower fan and the cool guiding block, be convenient to circulation of air.The size in space is controlled between 5mm～20mm.The excessive volume that then is unfavorable for controlling power battery pack, the too small circulation that then is unfavorable for air.
Claims (6)
1, a kind of power lithium-ion rechargeable battery group, comprise the battery pack that constitutes by cell and the shell of encapsulation, it is characterized in that: also be provided with a cooling system in the battery pack periphery, described cooling system comprises a semiconductor refrigerator and a coupled control circuit, wherein, the one side that semiconductor cooler relies on battery pack is a chill surface, and another side is a radiating surface.
2, power lithium-ion rechargeable battery group according to claim 1, it is characterized in that: described cooling system also comprises a cool guiding block, the chill surface of described semiconductor cooler is coated to be close to behind the heat conductive silica gel and is connected on the cool guiding block.
3, power lithium-ion rechargeable battery group according to claim 1, it is characterized in that: described cooling system also comprises a blower fan, this blower fan is electrically connected with control circuit, and air outlet is towards cool guiding block.
4, power lithium-ion rechargeable battery group according to claim 1, it is characterized in that: described cooling system also comprises a radiating block, the radiating surface of described semiconductor cooler is coated to be close to behind the heat conductive silica gel and is connected on the radiating block.
5, power lithium-ion rechargeable battery group according to claim 1, it is characterized in that: described cooling system also comprises a thermistor, it is installed in the cell surface, and is connected with control circuit.
6, power lithium-ion rechargeable battery group according to claim 1 is characterized in that: described cell, electrokinetic cell assembly housing, blower fan and cool guiding block leave the space each other, the size in space is controlled between 5mm～20mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU032743122U CN2665947Y (en) | 2003-09-05 | 2003-09-05 | Power lithium ion secondary battery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU032743122U CN2665947Y (en) | 2003-09-05 | 2003-09-05 | Power lithium ion secondary battery |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2665947Y true CN2665947Y (en) | 2004-12-22 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU032743122U Expired - Lifetime CN2665947Y (en) | 2003-09-05 | 2003-09-05 | Power lithium ion secondary battery |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2665947Y (en) |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101409374B (en) * | 2008-11-19 | 2010-06-23 | 南京科迅科技有限公司 | Constant temperature cabinet for accumulator and temperature-controlling method thereof |
| CN102361106A (en) * | 2011-09-07 | 2012-02-22 | 航天科工深圳（集团）有限公司 | Storage battery temperature adjusting system |
| CN105514523A (en) * | 2015-12-31 | 2016-04-20 | 普天新能源车辆技术有限公司 | Heat dissipation battery pack and battery heat dissipation method |
| CN106785197A (en) * | 2016-12-12 | 2017-05-31 | 芜湖市吉安汽车电子销售有限公司 | New-energy automobile assembled battery bag heat management system |
| CN107302120A (en) * | 2017-06-16 | 2017-10-27 | 陆建海 | A kind of lithium ion battery |
| CN107732327A (en) * | 2017-09-29 | 2018-02-23 | 安徽艾克瑞德科技有限公司 | One kind is internalized into colloid storage battery structure |
| CN108574126A (en) * | 2017-03-10 | 2018-09-25 | 何戴勇 | Power battery is quickly cooled down system |
| CN111987386A (en) * | 2020-08-31 | 2020-11-24 | 东方醒狮(福建)储能科技有限公司 | High-temperature fault cooling protection system for lithium power battery and control method thereof |
| US11769871B2 (en) | 2005-10-20 | 2023-09-26 | Mitsubishi Chemical Corporation | Lithium secondary batteries and nonaqueous electrolyte for use in the same |
-
2003
- 2003-09-05 CN CNU032743122U patent/CN2665947Y/en not_active Expired - Lifetime
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US11769871B2 (en) | 2005-10-20 | 2023-09-26 | Mitsubishi Chemical Corporation | Lithium secondary batteries and nonaqueous electrolyte for use in the same |
| CN101409374B (en) * | 2008-11-19 | 2010-06-23 | 南京科迅科技有限公司 | Constant temperature cabinet for accumulator and temperature-controlling method thereof |
| CN102361106A (en) * | 2011-09-07 | 2012-02-22 | 航天科工深圳（集团）有限公司 | Storage battery temperature adjusting system |
| CN105514523A (en) * | 2015-12-31 | 2016-04-20 | 普天新能源车辆技术有限公司 | Heat dissipation battery pack and battery heat dissipation method |
| CN106785197A (en) * | 2016-12-12 | 2017-05-31 | 芜湖市吉安汽车电子销售有限公司 | New-energy automobile assembled battery bag heat management system |
| CN108574126A (en) * | 2017-03-10 | 2018-09-25 | 何戴勇 | Power battery is quickly cooled down system |
| CN107302120A (en) * | 2017-06-16 | 2017-10-27 | 陆建海 | A kind of lithium ion battery |
| CN107732327A (en) * | 2017-09-29 | 2018-02-23 | 安徽艾克瑞德科技有限公司 | One kind is internalized into colloid storage battery structure |
| CN111987386A (en) * | 2020-08-31 | 2020-11-24 | 东方醒狮(福建)储能科技有限公司 | High-temperature fault cooling protection system for lithium power battery and control method thereof |
| CN111987386B (en) * | 2020-08-31 | 2021-11-12 | 东方醒狮(福建)储能科技有限公司 | High-temperature fault cooling protection system for lithium power battery and control method thereof |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CX01 | Expiry of patent term |
Expiration termination date: 20130905 Granted publication date: 20041222 |