CN209312827U - A kind of battery modules improving expansion - Google Patents
A kind of battery modules improving expansion Download PDFInfo
- Publication number
- CN209312827U CN209312827U CN201821931679.6U CN201821931679U CN209312827U CN 209312827 U CN209312827 U CN 209312827U CN 201821931679 U CN201821931679 U CN 201821931679U CN 209312827 U CN209312827 U CN 209312827U
- Authority
- CN
- China
- Prior art keywords
- protrusion
- battery modules
- lower case
- cavity
- upper cover
- 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.)
- Active
Links
Classifications
-
- 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
Landscapes
- Secondary Cells (AREA)
Abstract
The utility model provides a kind of battery modules for improving expansion, it mainly include upper cover, naked battery core and lower case, wherein, lower case is open at one end and has multiple hollow cavities, naked battery core is placed in the cavity, upper cover and lower case are tightly connected, and each cavity of lower case is made to respectively become independent seal cavity；Wherein, the partition between two neighboring cavity is arranged to: being in the direction of the width equidistantly the protrusion of rectangle with section.The battery modules of the utility model have the partition of appropriate bulge-structure by setting, just the naked battery core to be bonded therewith provides sufficient expansion space, caused risk of leakage and capacity attenuation are excessively expanded to reduce, guarantees entire battery modules cycle life and using safe.Meanwhile protrusion setting is very small relative to the entire space change of shell, material is unified, also fixes its relative position due to being integrally formed, reliability and durability are superior to elastic material in the prior art.
Description
Technical field
The utility model relates to automobile power cell technical fields, and in particular to a kind of battery modules for improving expansion.
Background technique
Electric car is the important development direction in new-energy automobile field, in order to guarantee enough course continuation mileages, electronic vapour
Vehicle needs to install a large amount of battery modules, and what battery modules were made of several single battery cores, this multiple battery cores compositions
There are shortcomings for the burst mode of mould group, as structural member is more, structure is complicated, rate is low in groups, energy density is low, maintainable difference
Etc..
It is public in a kind of document of the Chinese Patent Application No. for 201610164344.5 entitled " battery modules "
Opened a kind of battery modules, including lower case, upper cover and multiple naked battery cores, lower case it is open at one end and it is internal be equipped with it is multiple mutually not
The grid come round, grid is interior to place naked battery core, sets conduction connector in upper cover and is electrically connected with naked battery core, is sealed down by upper cover
Shell.
Although battery modules energy density can be improved in the program to a certain extent, in actual application, according to
So there is some shortcomingss.
In lithium battery use process, certain variation, especially graphite cathode can occur for electrode plates thickness.According to existing
Data, lithium battery pass through high temperature storage and circulation, are easy to happen bulging, thickness growth rate about 6%~20%, wherein positive swollen
Swollen rate is 4%, and cathode expansion rate is 20% or more.The reason of lithium battery pole slice thickness bulging is the substantial influence by graphite, is born
Pole graphite forms LiC in embedding lithiumx(LiC24、LiC12And LiC6Deng), spacing of lattice variation results in microcosmic internal stress, makes
Cathode generates expansion, and this expansion is expendable.Cathode expands so that core deformation, influences the embedding lithium degree of cathode and Li+Diffusion rate, if do not taken the necessary measures to this expansion, it will battery capacity decaying is caused to accelerate and cycle life drop
It is low.
In addition, there are impurity, such as moisture and metal impurities in inside battery electrolyte, the electrochemical window of electrolyte compared with
It is low, it easily decomposes generate gas during the charging process；After lithium battery is completed, the process being melted into advance can also generate a small amount of gas,
And the generation of these gases is inevitable.The gas that inside battery generates will lead to battery bulging.If without enough
Space for discharge expansion, easily cause at sealing leak or burst battery core, bring security risk.By large number of naked electricity
When core forms mould group, dual-pressure battery core, even more external to battery core with the matched cavity of battery core size is placed, inside and outside
It is leaked under the action of dual power or the odds that rises brokenly increases, further, may cause the internal short-circuit of entire mould group, in turn
Thermal runaway occurs, this is very dangerous the vehicle in being currently running.
In the prior art, it for this inevitable expansion, is typically employed between battery core and battery core, battery core and fixation
The reserved space that foam elastomeric material is expanded as battery core is placed between part, but this mode is extremely difficult to preferably require,
Because the decrement of foam is difficult to control, if the pre compressed magnitude of foam is too small, cause the fixation of battery core is unstable easy to pacify
Full problem；If the pre compressed magnitude of foam is excessive, cause the reserved expansion space of battery core insufficient, the decline of battery core electrical property.In addition,
The problems such as reliability and durability of foam elastomeric material need further to verify, material aging, denaturation in a disguised form reduces
The service life of battery itself.
Utility model content
In view of the deficiencies of the prior art, the utility model provides a kind of battery modules for improving expansion, is especially applied to
The battery modules of lithium ion battery improve the structure of battery modules for the expansion issues of battery, to pass through minimum
Improvement realize the effect that safety and energy efficiency are laid equal stress on.
Specifically, the technical solution that the battery modules of the utility model are taken is as follows:
A kind of battery modules mainly include upper cover, naked battery core and lower case, and the lower case is open at one end and has more
A hollow cavity, naked battery core arrangement in groups, are sequentially placed in the cavity, and upper cover and lower case are tightly connected, and make the chamber of lower case
Body becomes seal cavity independent；Wherein, the partition between two neighboring cavity is arranged to vertical concave-convex undulated: in width
Equidistantly there is protrusion on direction.When sending out expansion in the naked battery core course of work, the gap of naked battery core and partition room is used for battery core
Release expansion.
Wherein, consider that the section of the protrusion is most preferably rectangle from manufacture efficiency angle；The section can also be semicircle
The different shapes such as (space efficiency is most preferably), trapezoidal (preferably isosceles trapezoid), triangle (preferably, isosceles obtuse triangle).
Preferably, partition preferred thickness is 0.8-1mm；Long side/width (side on spacer width direction) etc. of protrusion
Spacing between adjacent two protrusion is for 10-20mm；Depth/short side of protrusion is 0.3-0.5mm.Naked battery core is installed to
In cavity, closed respectively with the face paste of the partition with the protrusion of two sides.
The number of cavities of lower case is greater than one, can be uniline arrangement, is also possible to the hollow only mutually of multirow arrangement
Vertical cavity, the cross sectional shape of cavity can be rectangle, diamond shape, triangle, circle, regular polygon, Length discrepancy polygon etc. and appoint
What form.Lower case and partition can be integrated molding part, are also possible to the splice of multiple component compositions, can be metal
Part is also possible to nonmetal parts, and matcoveredn is arranged in the surfaces externally and internally of lower case, prevents surface from occurring chemically or physically to react.
Upper cover is provided with busbar connector, safety valve, always bears pole and always just goes out pole, and busbar connector always bears pole and always just goes out pole
It is electrically connected respectively with the tab of naked battery core.Upper cover and lower case are tightly connected, and connection type can be splicing, ultrasonic welding, heat
Fusion welding etc..Upper cover is provided with liquid injection hole, after the completion of upper cover is connect with lower case, through liquid injection hole in each seal chamber
Electrolyte is injected, after the completion of fluid injection, safety valve, the quantity of safety valve and the number of cavities one of lower case are installed in fluid injection hole site
It causes.The surface of upper cover is provided with protective layer used in preventing chemically or physically to react, and upper cover is integrated with for detecting voltage, temperature
The structure of degree.
Multiple naked battery cores arrangements in groups, are placed sequentially in the cavity of lower case, and the positive and negative tab of battery core is respectively and always just
Pole, total negative pole out, busbar connector electrical connection out.
The advantage of battery modules provided by the utility model is: having appropriate bulge-structure by setting in lower case
Partition, just the naked battery core to be bonded therewith provides sufficient expansion space, leaks wind caused by excessively expansion to reduce
Danger and capacity attenuation guarantee entire battery modules cycle life and using safe.Meanwhile protrusion setting is entirely empty relative to shell
Between change very small, material is unified, also fixes its relative position due to being integrally formed, and reliability and durability are superior to existing
Elastic material in technology.
Detailed description of the invention
Fig. 1: the battery modules explosive view in background technique；Wherein, 20 be upper cover；40 be naked battery core；50 be lower case；
Fig. 2: the battery modules explosive view of the utility model embodiment；
Fig. 3: the naked battery core of the battery modules of the utility model embodiment and partition mounting structure partial view；
Fig. 4: the battery modules upper cover top view of the utility model embodiment；
Fig. 5: the battery modules lower case of the utility model embodiment surveys views such as just.
In figure: 1 upper cover；1-1 busbar connector；1-2 safety valve；1-3 always bears pole；1-4 always just goes out pole；2 naked battery cores；
3 lower cases；3-1 partition
Specific embodiment
It is clear in order to be more clear the purpose of this utility model, technical scheme and beneficial effects, with reference to embodiments
And attached drawing, the present invention will be further described in detail.It should be understood that specific embodiment party described in this specification
Formula is not intended to limit the utility model just for the sake of explaining the utility model.
The present embodiment provides a kind of battery modules, as shown in Fig. 2, mainly including upper cover 1, naked battery core 2 and lower case 3, it is naked
2 quantity of battery core is 12, and lower case 3 is the cavity with multiple (12) same end openings, and 12 naked battery cores 2 are respectively placed in chamber
In vivo, upper cover 1 and lower case 3 are connected and fixed (sweat soldering).
For lower case 3 using the carbon fibre materials of injection molding, there are the hollow cavity of 12 opening upwards, hollow cavity in inside
Total length, overall width, total height and naked 2 shape of battery core coordinate, be consistent, naked battery core 2 is placed in cavity, and it is fixed to pass through upper cover 1
Sealing, inside form 12 confined spaces being each independently of the others, as shown in Figure 5.
Partition 3-1 in lower case 3 between two neighboring cavity is arranged to vertical concave-convex undulated: the partition 3-1 is under
Shell 3 is an integral piece, and it is 15mm that the width of crowning is identical as the spacing between protrusion, and raised depth is 0.4mm,
Block board thickness is 0.8mm.Naked battery core 2 is installed in cavity, is closed respectively with the face paste with protrusion of partition 3-1, as shown in Figure 3.
When expanding in naked 2 course of work of battery core, gap (raised space) between naked battery core 2 and partition 3-1 is released for battery core
Put the space of expansion.
Upper cover 1 be integrally formed part, as shown in figure 4, upper cover 1 be arranged busbar connector 1-1, it is total negative go out pole 1-3 and it is total just
Pole 1-4 out.Total negative pole 1-3 out, total just pole 1-4 is electrically connected with the tab of battery core 2 naked in lower case 3 out, it is preferred that busbar connector 1-
1, using laser welding, the mode that is connected and fixed with upper cover 1 is screw for always negative pole 1-3 out, total connection for just going out pole 1-4 and tab
Connection.Liquid injection hole is arranged in the intermediate position of upper cover 1, and after the completion of fluid injection, mounting hole of this liquid injection hole as safety valve 1-5 realizes one
Hole is multi-purpose, and the quantity of safety valve 1-5 is 12.It is also integrated with inside upper cover 1 for collection voltages, the structure of temperature, in upper cover 1
Just go out the position pole 1-4 with total in total negative pole 1-3 out, corresponding identifier is set.
Above said content is only the basic explanation under the utility model design, and according to the technical solution of the utility model
Any equivalent transformation, all should belong to the protection range of the utility model.The foregoing is merely the preferable implementations of the utility model
Example, be not intended to limit the utility model, it is made within the spirit and principle of the present invention it is any modification, etc.
With replacement and improvement etc., should be included within the scope of protection of this utility model.
Claims (8)
1. a kind of battery modules for improving expansion mainly include upper cover, naked battery core and lower case, wherein described lower case one end
It is open and there are multiple hollow cavities, the naked battery core is placed in the cavity, the upper cover and lower case sealing company
It connects, each cavity of the lower case is made to respectively become independent seal cavity；It is characterized in that, between two neighboring cavity every
Plate is arranged to: equidistantly having protrusion in the direction of the width.
2. battery modules according to claim 1, which is characterized in that the block board thickness is 0.8-1mm, the protrusion
Depth is 0.3-0.5mm, and it is 10-20mm that the spacing between the width of the protrusion and each protrusion is equal.
3. battery modules according to claim 1 or 2, which is characterized in that the section of the protrusion is rectangle, the length of rectangle
Side is the width of the protrusion, and the spacing between each protrusion is equal；The short side of rectangle is the width of the protrusion.
4. battery modules according to claim 1 or 2, which is characterized in that the section of the protrusion can also be trapezoidal, semicircle
The shapes such as shape, triangle.
5. battery modules according to claim 1 or 2, which is characterized in that the naked battery core is placed in the cavity simultaneously
It is closed respectively with two sides, partition with protrusion face paste.
6. battery modules according to claim 1 or 2, which is characterized in that the partition and the lower case be one at
The splice of type part or multiple components composition.
7. battery modules according to claim 1 or 2, which is characterized in that the upper cover is provided with total negative pole out, confluence
Row, it is total just go out pole and safety valve, the busbar connector described total negative goes out pole and described total just going out the pole pole with the naked battery core respectively
Ear is electrically connected.
8. battery modules according to claim 1 or 2, which is characterized in that the upper cover further includes liquid injection hole, which is infusing
After the completion of liquid, for installing safety valve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821931679.6U CN209312827U (en) | 2018-11-22 | 2018-11-22 | A kind of battery modules improving expansion |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821931679.6U CN209312827U (en) | 2018-11-22 | 2018-11-22 | A kind of battery modules improving expansion |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209312827U true CN209312827U (en) | 2019-08-27 |
Family
ID=67674035
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201821931679.6U Active CN209312827U (en) | 2018-11-22 | 2018-11-22 | A kind of battery modules improving expansion |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN209312827U (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110571387A (en) * | 2019-10-12 | 2019-12-13 | 荣盛盟固利新能源科技有限公司 | Integrated battery module |
| CN112290132A (en) * | 2020-09-22 | 2021-01-29 | 合肥国轩高科动力能源有限公司 | Square lamination lithium battery module of integrated into one piece |
| WO2021098455A1 (en) * | 2019-11-22 | 2021-05-27 | 比亚迪股份有限公司 | Battery, battery module, battery pack and electric vehicle |
| CN113571826A (en) * | 2020-04-10 | 2021-10-29 | 北京昆兰新能源技术有限公司 | Battery module of alloy plastic shell |
| CN113594610A (en) * | 2020-04-30 | 2021-11-02 | 蜂巢能源科技有限公司 | Battery module for vehicle and vehicle |
-
2018
- 2018-11-22 CN CN201821931679.6U patent/CN209312827U/en active Active
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110571387A (en) * | 2019-10-12 | 2019-12-13 | 荣盛盟固利新能源科技有限公司 | Integrated battery module |
| WO2021098455A1 (en) * | 2019-11-22 | 2021-05-27 | 比亚迪股份有限公司 | Battery, battery module, battery pack and electric vehicle |
| CN113571826A (en) * | 2020-04-10 | 2021-10-29 | 北京昆兰新能源技术有限公司 | Battery module of alloy plastic shell |
| CN113571826B (en) * | 2020-04-10 | 2023-05-30 | 北京昆兰新能源技术有限公司 | Battery module of alloy plastic shell |
| CN113594610A (en) * | 2020-04-30 | 2021-11-02 | 蜂巢能源科技有限公司 | Battery module for vehicle and vehicle |
| CN113594610B (en) * | 2020-04-30 | 2024-02-23 | 蜂巢能源科技有限公司 | Battery module for vehicle and vehicle |
| CN112290132A (en) * | 2020-09-22 | 2021-01-29 | 合肥国轩高科动力能源有限公司 | Square lamination lithium battery module of integrated into one piece |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN209312827U (en) | A kind of battery modules improving expansion | |
| WO2021143514A1 (en) | Battery, battery pack and electric vehicle | |
| WO2018157557A1 (en) | Battery module | |
| CN103208633B (en) | Horizon battery and manufacturing method thereof | |
| CN103137343B (en) | A kind of cylinder battery capacitor | |
| CN215578776U (en) | Cylindrical lithium ion battery with novel structure | |
| CN206490142U (en) | A kind of horizon battery of multi-cell | |
| CN110061158A (en) | A kind of power battery sealing buffering heat insulating mattress | |
| CN214753961U (en) | Battery module | |
| CN215418343U (en) | Battery top cap | |
| CN111211253A (en) | Battery module | |
| CN111211263A (en) | Improve expanded battery module | |
| CN209312805U (en) | A kind of battery modules | |
| CN209526137U (en) | Battery system and electric vehicle with the battery system | |
| CN209344184U (en) | Battery system and electric vehicle with the battery system | |
| CN209592167U (en) | Battery modules and battery system and electric vehicle with the battery modules | |
| CN114156530A (en) | Lithium ion battery assembly and casting method | |
| CN209374517U (en) | Battery system and electric vehicle with the battery system | |
| CN209104193U (en) | A kind of soft pack cell aluminium sheet | |
| CN203787534U (en) | Embedded lithium ion battery shell | |
| CN201270262Y (en) | Pole column sealing structure for large capacity lithium ionic power cell | |
| CN219350362U (en) | Layered heat dissipation structure of lithium battery pack | |
| CN211980790U (en) | Battery, battery module, battery pack and automobile | |
| CN217768448U (en) | Electric pile shell and fuel cell electric pile | |
| CN217641461U (en) | Novel electricity core structure |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |