CN110854328A - Lithium ion battery with current collector cooling flow channel - Google Patents
Lithium ion battery with current collector cooling flow channel Download PDFInfo
- Publication number
- CN110854328A CN110854328A CN201911157427.1A CN201911157427A CN110854328A CN 110854328 A CN110854328 A CN 110854328A CN 201911157427 A CN201911157427 A CN 201911157427A CN 110854328 A CN110854328 A CN 110854328A
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- CN
- China
- Prior art keywords
- battery
- cooling flow
- current collector
- flow channel
- cooling
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/60—Heating or cooling; Temperature control
- H01M10/61—Types of temperature control
- H01M10/613—Cooling or keeping cold
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/60—Heating or cooling; Temperature control
- H01M10/62—Heating or cooling; Temperature control specially adapted for specific applications
- H01M10/625—Vehicles
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/60—Heating or cooling; Temperature control
- H01M10/65—Means for temperature control structurally associated with the cells
- H01M10/655—Solid structures for heat exchange or heat conduction
- H01M10/6551—Surfaces specially adapted for heat dissipation or radiation, e.g. fins or coatings
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/60—Heating or cooling; Temperature control
- H01M10/65—Means for temperature control structurally associated with the cells
- H01M10/655—Solid structures for heat exchange or heat conduction
- H01M10/6554—Rods or plates
- H01M10/6555—Rods or plates arranged between the cells
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/60—Heating or cooling; Temperature control
- H01M10/65—Means for temperature control structurally associated with the cells
- H01M10/656—Means for temperature control structurally associated with the cells characterised by the type of heat-exchange fluid
- H01M10/6567—Liquids
- H01M10/6568—Liquids characterised by flow circuits, e.g. loops, located externally to the cells or cell casings
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/20—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
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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
Abstract
A lithium ion battery with a current collector cooling flow passage relates to a battery with a cooling flow passage, and belongs to the technical field of batteries. The problem of the heat dissipation technique of current battery mainly adopt the outside to arrange the liquid cooling board and carry out the heat dissipation to the battery package, cause the inside and outside difference in temperature of battery too big to lead to the battery decay inconsistent, influence the security of battery is solved. The invention comprises a plurality of battery monomers, wherein the end parts of a positive pole column and a negative pole column of each battery monomer are welded with current collectors, two sides of each current collector are respectively provided with a cooling flow channel, an insulator is arranged between each cooling flow channel and each current collector, the cooling flow channels are arranged between a shell of each battery monomer and a battery roll core, and two ends of each cooling flow channel penetrate through the shell of each battery monomer; the cooling channels of the plurality of battery monomers are communicated to form a closed channel, and a cooling medium is arranged in the cooling channel. The invention is suitable for use as a battery.
Description
Technical Field
The invention relates to a battery with a cooling flow channel, and belongs to the technical field of batteries.
Background
With the rapid development of electric automobile technology, the electric automobiles occupy a larger and larger area in the whole automobile market. However, the safety problem of the electric vehicle is an important problem, wherein the battery aging speed is inconsistent with the increase of the number of times of the large-rate charge-discharge cycle due to the local overcharge and the local overdischarge of the battery caused by different stress conditions of the battery, and the safety problem of the battery caused by the inconsistent aging speed is not negligible. In particular, inconsistency in stress conditions of respective portions of a battery due to temperature unevenness in the stress conditions of the battery is urgently required to be solved.
At present, the mainstream heat dissipation technology of the battery mainly utilizes a heat management technology to dissipate heat of a battery pack by arranging a liquid cooling plate outside the battery. Although the prior art can play a good role in heat dissipation of the battery, the problems of excessive temperature difference inside and outside the battery and serious heating of the battery tab part are not effectively solved, the battery attenuation is inconsistent due to the large temperature difference of the whole battery, meanwhile, the battery thermal runaway is easily caused due to the overhigh temperature of the battery tab part, and the battery safety problem caused by the temperature difference is not ignored.
Disclosure of Invention
The invention provides a lithium ion battery with a current collector cooling flow channel, which aims to solve the problems that the battery attenuation is inconsistent and the safety of the battery is affected due to the fact that the temperature difference between the inside and the outside of the battery is too large because the external liquid cooling plate is mainly adopted to dissipate heat of a battery pack in the existing battery heat dissipation technology.
The invention relates to a lithium ion battery with a current collector cooling flow passage, which comprises a plurality of battery monomers, wherein the end parts of a positive electrode pole and a negative electrode pole of each battery monomer are connected with a current collector 3, the two sides of each current collector 3 are provided with cooling flow passages 5, and the current collector 3 is positioned between a shell 7 of each battery monomer and a battery roll core 6;
an insulator is arranged between the cooling flow channel 5 and the current collector 3, the cooling flow channel 5 is arranged between a shell 7 of the single battery and a battery roll core 6, and two ends of the cooling flow channel 5 penetrate through the shell 7 of the single battery; the cooling channels 5 of the plurality of battery cells are communicated, and a cooling medium is filled in the cooling channels 5.
Further, the current collector 3 is connected to a positive electrode tab 1 or a negative electrode tab 2.
Further, the surface of the cooling flow channel 5 is coated with a layer of thermally conductive insulating material.
Further, the cooling medium in the cooling flow passage 5 is a cooling liquid, air, or a refrigerant.
Aiming at the problem that the positive electrode lug and the negative electrode lug, the positive current collector and the negative current collector generate heat seriously in the process of charging and discharging the battery with large multiplying power, the invention fully utilizes the gap between the battery current collector and the battery shell to arrange a cooling flow channel, takes away the heat generated by the lug part in the process of charging and discharging the battery, and inhibits the heat from being transferred to the inner part of the battery roll core so as to achieve the purposes of effectively radiating the battery and keeping the temperature distribution of the battery uniform, thereby avoiding the problems of battery safety and inconsistent battery attenuation speed caused by thermal runaway of the battery and local hot areas. The safety of the battery in the using process is improved.
Drawings
Fig. 1 is a schematic structural view of a square-can battery with current collector cooling flow channels;
FIG. 2 is a right side view of FIG. 1;
FIG. 3 is a cross-sectional view A-A of FIG. 1;
FIG. 4 is a cross-sectional view B-B of FIG. 1;
FIG. 5 is a top view of FIG. 1;
fig. 6 is a schematic structural diagram of a same-side tab soft package battery with a current collector cooling flow channel;
FIG. 7 is a right side view of FIG. 6;
FIG. 8 is a top view of FIG. 6;
FIG. 9 is a sectional view A-A of FIG. 6;
FIG. 10 is a cross-sectional view B-B of FIG. 6;
fig. 11 is a schematic structural diagram of a double-tab soft package battery with a current collector cooling flow channel;
FIG. 12 is a cross-sectional view C-C of FIG. 11;
fig. 13 is an enlarged view of the positions E and F in fig. 12.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
It should be noted that the embodiments and features of the embodiments may be combined with each other without conflict.
The invention is further described with reference to the following drawings and specific examples, which are not intended to be limiting.
The first embodiment is as follows: in the following, the present embodiment will be described with reference to fig. 1 to 13, wherein the lithium ion battery with current collector cooling flow channels according to the present embodiment,
the battery comprises a plurality of battery monomers, wherein the end parts of a positive pole column and a negative pole column of each battery monomer are connected with a current collector 3, two sides of each current collector 3 are provided with cooling flow channels 5, and the current collectors 3 are positioned between a shell 7 of each battery monomer and a battery roll core 6;
an insulator is arranged between the cooling flow channel 5 and the current collector 3, the cooling flow channel 5 is arranged between a shell 7 of the single battery and a battery roll core 6, and two ends of the cooling flow channel 5 penetrate through the shell 7 of the single battery; the cooling channels 5 of the plurality of battery cells are communicated, and a cooling medium is filled in the cooling channels 5.
Further, the current collector 3 is connected to a positive electrode tab 1 or a negative electrode tab 2.
In this embodiment, the outer end of the current collector whose inner end is connected with the battery anode pole is connected with the anode tab 1, and the outer end of the current collector whose inner end is connected with the battery cathode pole is connected with the cathode tab 2.
Further, the surface of the cooling flow channel 5 is coated with a layer of thermally conductive insulating material.
Further, the cooling medium in the cooling flow passage 5 is a cooling liquid, air, or a refrigerant.
The battery described in this embodiment includes: anodal utmost point ear, negative pole utmost point ear, anodal mass flow body, the negative current body, cooling runner, battery roll up core, battery case includes the top cap, the top cap is in the same place with the welding of casing body, the inspection to battery structure when being convenient for break down.
A square-can battery with current collector cooling flow channels, as shown in fig. 1 to 5;
the square-shell battery with the current collector is a battery with electrode lugs on the same side, and the electrode of the battery can be cooled only by adopting a set of cooling channels.
The structure schematic diagram of the soft package battery with the same side tab of the current collector cooling flow channel is shown; as shown in particular in fig. 6 to 10;
the schematic structural diagram of the soft-package battery with the current collector cooling flow channels and the two tabs at two ends is specifically shown in fig. 11 to 13, and the structure comprises two groups of cooling flow channels which are respectively positioned on the positive and negative current collectors or two sides of the positive and negative tabs.
The battery positive current collector and the battery negative current collector are provided with cooling flow passages on two sides. The size of the cooling channel can be varied within reasonable limits for different battery types. The cooling flow channel is made of a material (such as aluminum or copper) with good heat transfer performance and corrosion resistance.
In the embodiment, the contact part between the cooling flow channel and the positive and negative current collectors or the positive and negative electrode tabs needs to be insulated, and the insulating material has good heat conduction capacity. And heat-conducting insulating materials (such as heat-conducting silicone grease) for ensuring effective thermal contact are coated between the cooling flow channel and the contact surfaces of the positive and negative current collectors or the positive and negative electrode lugs. The cooling medium in the cooling flow channel can be cooling liquid, air or refrigerant.
The good air tightness between the cooling flow channel and the battery aluminum-plastic film shell is ensured, and the complete isolation between the cooling medium and the battery roll core is ensured.
The invention aims at the characteristics that the temperature of a lug part of a lithium ion battery is higher in the process of high-rate charge and discharge and the temperature change is sensitive to the change of external stress, and designs a lithium ion battery structure for solving the problems of inconsistent aging speed of the battery and thermal runaway risk caused by serious heating of the lug in the process of charge and discharge. By the aid of the cooling system, the problem that the ageing speed of the battery is inconsistent due to serious heat generation of the battery tabs can be solved, the quality and the size of the cooling system can be effectively reduced, and the energy density of the battery pack of the electric automobile is improved.
Although the invention herein has been described with reference to particular embodiments, it is to be understood that these embodiments are merely illustrative of the principles and applications of the present invention. It is therefore to be understood that numerous modifications may be made to the illustrative embodiments and that other arrangements may be devised without departing from the spirit and scope of the present invention as defined by the appended claims. It should be understood that features described in different dependent claims and herein may be combined in ways different from those described in the original claims. It is also to be understood that features described in connection with individual embodiments may be used in other described embodiments.
Claims (4)
1. The lithium ion battery with the current collector cooling flow channel is characterized by comprising a plurality of battery monomers, wherein the end parts of a positive electrode pole and a negative electrode pole of each battery monomer are connected with a current collector (3), the two sides of each current collector (3) are provided with the cooling flow channel (5), and the current collectors (3) are positioned between a shell (7) of each battery monomer and a battery roll core (6);
an insulator is arranged between the cooling flow channel (5) and the current collector (3), the cooling flow channel (5) is arranged between the single battery shell (7) and the battery roll core (6), and two ends of the cooling flow channel (5) penetrate through the single battery shell (7); the cooling flow channels (5) of the plurality of battery cells are communicated, and a cooling medium is arranged in the cooling flow channels (5).
2. The lithium ion battery with the current collector cooling flow channel is characterized in that the current collector (3) is also connected with a positive electrode tab (1) or a negative electrode tab (2).
3. The lithium ion battery with the current collector cooling flow channel as claimed in claim 1, wherein the surface of the cooling flow channel (5) is coated with a layer of heat conducting and insulating material.
4. The lithium ion battery with the current collector cooling flow channel as claimed in claim 1, wherein the cooling medium in the cooling flow channel (5) is a cooling liquid, air or a refrigerant.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911157427.1A CN110854328A (en) | 2019-11-22 | 2019-11-22 | Lithium ion battery with current collector cooling flow channel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911157427.1A CN110854328A (en) | 2019-11-22 | 2019-11-22 | Lithium ion battery with current collector cooling flow channel |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110854328A true CN110854328A (en) | 2020-02-28 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201911157427.1A Pending CN110854328A (en) | 2019-11-22 | 2019-11-22 | Lithium ion battery with current collector cooling flow channel |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2021212513A1 (en) * | 2020-04-24 | 2021-10-28 | 东莞新能德科技有限公司 | Battery encapsulation structure |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2018125073A (en) * | 2017-01-30 | 2018-08-09 | トヨタ自動車株式会社 | Secondary battery |
| CN109935926A (en) * | 2017-06-28 | 2019-06-25 | 湖南妙盛汽车电源有限公司 | A kind of cylindrical lithium ion battery |
| CN110474125A (en) * | 2017-06-28 | 2019-11-19 | 湖南妙盛汽车电源有限公司 | A kind of lithium ion soft-package battery |
-
2019
- 2019-11-22 CN CN201911157427.1A patent/CN110854328A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2018125073A (en) * | 2017-01-30 | 2018-08-09 | トヨタ自動車株式会社 | Secondary battery |
| CN109935926A (en) * | 2017-06-28 | 2019-06-25 | 湖南妙盛汽车电源有限公司 | A kind of cylindrical lithium ion battery |
| CN110474125A (en) * | 2017-06-28 | 2019-11-19 | 湖南妙盛汽车电源有限公司 | A kind of lithium ion soft-package battery |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2021212513A1 (en) * | 2020-04-24 | 2021-10-28 | 东莞新能德科技有限公司 | Battery encapsulation structure |
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Application publication date: 20200228 |
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| RJ01 | Rejection of invention patent application after publication |