CN209592092U - Battery modules and battery pack - Google Patents
Battery modules and battery pack Download PDFInfo
- Publication number
- CN209592092U CN209592092U CN201920366304.8U CN201920366304U CN209592092U CN 209592092 U CN209592092 U CN 209592092U CN 201920366304 U CN201920366304 U CN 201920366304U CN 209592092 U CN209592092 U CN 209592092U
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- Prior art keywords
- battery
- battery modules
- electrode assembly
- lamina tecti
- shell
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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
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- Battery Mounting, Suspending (AREA)
- Connection Of Batteries Or Terminals (AREA)
Abstract
The utility model provides a kind of battery modules and battery pack.Battery pack includes cabinet and battery modules, and battery modules are multiple and are contained in cabinet.Battery modules include the multiple battery units arranged in the horizontal direction, and battery unit includes at least a battery cell.Battery cell includes electrode assembly, shell and cap assembly, and shell has opening, and electrode assembly is contained in shell.Cap assembly includes lamina tecti, explosion rupture disk and protection component, and lamina tecti is connected to shell and covers the opening of shell.Lamina tecti has through-hole, and explosion rupture disk is connected to lamina tecti and covers the through-hole of lamina tecti, and protection component is set to the surface of the close electrode assembly of explosion rupture disk.
Description
Technical field
The utility model relates to field of batteries more particularly to a kind of battery modules and battery pack.
Background technique
Battery modules are widely used in electric car field, and battery modules generally include multiple secondary cells.In order to mention
High safety performance, secondary cell are usually provided with explosion rupture disk, and when secondary cell acutely produces gas because unexpected, producing gas can break through
Explosion rupture disk and the outside for being discharged into secondary cell, to avoid exploding.In order to realize degassing function, explosion rupture disk usually has smaller
Thickness；And in the use process of secondary cell, explosion rupture disk may be subjected to the corrosion of electrolyte, and cause explosion rupture disk to fail,
Leakage is caused, security risk is caused.
Utility model content
In view of the problems in the background art, the purpose of this utility model is to provide a kind of battery modules and batteries
Packet, is avoided that explosion rupture disk is corroded, and improves security performance.
To achieve the goals above, the utility model provides a kind of battery modules and battery pack.
Battery modules include the multiple battery units arranged in the horizontal direction, and battery unit includes at least a battery list
Body.Battery cell includes electrode assembly, shell and cap assembly, and shell has opening, and electrode assembly is contained in shell.Top cover
Component includes lamina tecti, explosion rupture disk and protection component, and lamina tecti is connected to shell and covers the opening of shell.Lamina tecti has logical
Hole, explosion rupture disk are connected to lamina tecti and cover the through-hole of lamina tecti, and protection component is set to the close electrode assembly of explosion rupture disk
Surface.
The material of component is protected to be gold, silver, copper, platinum, aluminum oxide, iron oxide, zinc oxide, magnesia, calcium oxide, gather
Propylene, poly terephthalic acid class plastics, ethylene oxide, propylene oxide, polyoxyethylene, polyvinyl chloride, polyphosphazene, gathers polyethylene
Ethylene glycol, polymethyl methacrylate, polyacrylonitrile, polyethylene glycol dimethyl ether, Kynoar, butadiene-styrene rubber, carboxymethyl are fine
Dimension element, polystyrene acid.
Protect component with a thickness of 0.01mm-3mm.
The surface of the close electrode assembly of explosion rupture disk is completely covered in protection component.
Protection component also extends on lamina tecti and covers the junction of lamina tecti and explosion rupture disk.
Electrode assembly includes the first pole piece, the second pole piece and the diaphragm being set between the first pole piece and the second pole piece.
Electrode assembly be takeup type structure and be it is flat, the outer surface of electrode assembly includes two flat horizontal surfaces, and two flat horizontal surfaces are along perpendicular
Histogram is to facing each other；Alternatively, electrode assembly is laminated structure, the first pole piece, diaphragm and the second pole piece layer along the vertical direction
It is folded.
Shell includes two first surfaces and two second surfaces, and the area of first surface is greater than the area of second surface.
Two second surfaces in each battery cell face each other in the horizontal direction, described two first surface edges in each battery cell
Vertical direction faces each other.
Each battery unit includes the multiple battery cells arranged along the vertical direction.
Battery cell has multiple electrodes component, and multiple electrodes component is vertically stacked setting.
The battery modules further include end plate and band, and end plate is set to two of the multiple battery unit in the horizontal direction
End, band are looped around the periphery of the multiple battery unit and end plate.
Battery pack includes cabinet and the battery modules, and battery modules are multiple and are contained in cabinet.
The beneficial effects of the utility model are as follows: in this application, protection component can separate explosion rupture disk and electrolyte,
The risk that explosion rupture disk is corroded is reduced, security performance is improved.
Detailed description of the invention
Fig. 1 is the exploded view according to the battery pack of the utility model.
Fig. 2 is the schematic diagram of the battery modules of Fig. 1.
Fig. 3 is the schematic diagram of the battery of Fig. 2.
Fig. 4 is the exploded view of the battery of Fig. 3.
Fig. 5 is the cross-sectional view of the electrode assembly of Fig. 4.
Fig. 6 is a schematic diagram of the cap assembly of Fig. 3, wherein protection component omits.
Fig. 7 is another schematic diagram of the cap assembly of Fig. 3.
Wherein, the reference numerals are as follows:
1 battery unit
11 battery cells
111 electrode assemblies
The first pole piece of 111a
The second pole piece of 111b
111c diaphragm
111d flat horizontal surface
112 shells
112a accommodating chamber
112b first surface
112c second surface
113 cap assemblies
113a lamina tecti
113b explosion rupture disk
113c protects component
113d electrode terminal
113e screening glass
2 end plates
3 bands
4 cabinets
41 upper box lids
42 lower boxes
5 harness plates
X horizontal direction
Y width direction
Z vertical direction
Specific embodiment
It is with reference to the accompanying drawings and embodiments, right in order to which the objects, technical solutions and advantages of the application are more clearly understood
The application is further elaborated.It should be appreciated that specific embodiment described herein is only used to explain the application, and
It is not used in restriction the application.
In the description of the present application unless specifically defined or limited otherwise, term " first ", " second " are only used for describing
Purpose, be not understood to indicate or imply relative importance；Term " multiple " refers to more than two (including two)；；It removes
Non- to state otherwise or illustrate, term " connection ", " fixation " etc. shall be understood in a broad sense, for example, " connection " may be a fixed connection,
It may be a detachable connection, or be integrally connected, or electrical connection or signal connection；" connection " can be directly connected, can also
With indirectly connected through an intermediary.For the ordinary skill in the art, can understand as the case may be above-mentioned
The concrete meaning of term in this application.
In the description of this specification, it is to be understood that the nouns of locality such as "upper", "lower" described in the embodiment of the present application are
With angle shown in the drawings come what is be described, the restriction to the embodiment of the present application should not be construed as.Below by specific reality
It applies example and the application is described in further detail in conjunction with attached drawing.
In the description of the present application, horizontal direction X is the direction for being parallel to horizontal plane；Certainly, horizontal direction X includes absolute
It is parallel to the direction of horizontal plane, also includes the direction for being roughly parallel to horizontal plane of conventional cognitive in engineering.Vertical direction Z is vertical
Directly in the direction of horizontal plane, certainly, vertical direction Z not only includes absolute upright in the direction of horizontal plane, also includes normal in engineering
Advise the direction for being approximately perpendicular to horizontal plane of cognition.Width direction Y is to be parallel to the direction of horizontal plane and generally perpendicular to level
Direction X.
The battery pack of the application can be applied to electric car.Wherein, electric car can be pure electric automobile, can also can mix
Power vehicle.Battery pack provides electric energy for automobile, and drives automobile to advance by motor.It is set to electricity to battery pack preferred levels
The car body of electrical automobile.In electric car, horizontal direction X can be directed toward the direction of the tailstock for headstock.
Referring to Fig.1, battery pack may include battery modules and cabinet 4.Cabinet 4 may include upper box lid 41 and lower box 42, on
Case lid 41 and lower box 42 are tightly connected, and form cavity therebetween.Battery modules can be multiple and be contained in cabinet 4
In cavity.Cabinet 4 can be made of aluminium, aluminium alloy or other metal materials.
In electric car, the chassis height by electric car is limited, and battery pack can utilize on vertical direction Z
Space it is limited.Therefore, multiple battery modules preferably in the horizontal direction X or width direction the Y arrangement in battery pack, to reduce electricity
Chi Bao the space occupied on vertical direction Z.
In this application, the top of battery modules can be adhered to upper box lid 41, and the bottom of battery modules can be adhered to nowel
Body 42.
Referring to Fig. 2, the battery modules of the application may include the battery unit 1 that multiple X in the horizontal direction are arranged successively, and each
Battery unit 1 includes at least a battery cell 11.
Battery cell 11 can be prismatic lithium ion battery.Specifically, referring to Fig. 3 and Fig. 4, each battery cell 11 includes
Electrode assembly 111, shell 112 and cap assembly 113.
Referring to Fig. 5, electrode assembly 111 includes the first pole piece 111a, the second pole piece 111b and diaphragm 111c, diaphragm 111c will
First pole piece 111a and the second pole piece 111b are separated.
The electrode assembly 111 of the application can be takeup type structure, specifically, the first pole piece 111a, the second pole piece 111b and
Diaphragm 111c is banded structure, and the first pole piece 111a, diaphragm 111c and the second pole piece 111b are stacked gradually and wind two circles
Above to form electrode assembly 111, and electrode assembly 111 is in flat.When preparing electrode assembly 111, electrode assembly 111
It can be first wound into hollow column construction, it is flat for flattening again after winding.Fig. 5 is showing for the appearance profile of electrode assembly 111
It is intended to, the outer surface of electrode assembly 111 includes that Z is faced each other along the vertical direction by two flat horizontal surfaces 111d, two flat horizontal surface 111d.
Flat horizontal surface 111d can be opposed flattened surface, it is not required that be pure-surface.
Alternatively, electrode assembly 111 may also comprise multiple first pole piece 111a and multiple second pole piece 111b, and described
Z is alternately stacked along the vertical direction by one pole piece 111a and the multiple second pole piece 111b, and adjacent the first pole piece 111a and
Diaphragm 111c is equipped between two pole piece 111b.
Referring to Fig. 4, it is formed with accommodating chamber 112a inside shell 112, to accommodate electrode assembly 111 and electrolyte.It accommodates
The one end chamber 112a has opening, and electrode assembly 111 can be placed into accommodating chamber 112a via the opening.Shell 112 can
It is made of the material of the conductive metals such as aluminum or aluminum alloy.
Referring to Fig. 4, cap assembly 113 includes lamina tecti 113a, explosion rupture disk 113b, electrode terminal 113d and screening glass
113e.Lamina tecti 113a is connected to shell 112 and covers the opening of shell 112, so that electrode assembly 111 is sealed in shell
In 112.
Lamina tecti 113a has through-hole, and explosion rupture disk 113b is connected to lamina tecti 113a and covers the through-hole of lamina tecti 113a.
Explosion rupture disk 113b may be disposed at the side of the close electrode assembly 111 of lamina tecti 113a, and hermetically solid by modes such as welding
Due to lamina tecti 113a.Explosion rupture disk 113b can be equipped with the structures such as indentation, to form weakness zone.When battery cell 11 is because of short circuit etc.
Reason and when acutely producing gas, explosion rupture disk 113b is broken in weakness zone, so that the through-hole of lamina tecti 113a be opened, is discharged in time
It is internal out to produce gas, it avoids exploding.
Screening glass 113e is securable to the outside of lamina tecti 113a and covers the through-hole of lamina tecti 113a, to avoid outside
Impurity pollute explosion rupture disk 113b.
Electrode terminal 113d is set to lamina tecti 113a.Electrode terminal 113d can be two, one and the first pole piece 111a
Electrical connection, another is electrically connected with the second pole piece 111b.
However, the electrolyte inside battery cell 11 is easy to connect with explosion rupture disk 113b in the use process of battery modules
Touching.And since explosion rupture disk 113b is relatively thin, it is easy to be corroded and run through in weakness zone, electrolyte is caused to leak, cause safety wind
Danger.
It is therefore preferred that the cap assembly 113 of the application further includes protection component 113c, protection component 113c is set to
The surface of the close electrode assembly 111 of explosion rupture disk 113b.In this application, protection component 113c can be by explosion rupture disk 113b and electricity
Solution liquid separates, and reduces the risk that explosion rupture disk 113b is corroded, and improves security performance.
The material for protecting component 113c is electrolyte resistance material.Specifically, protect component 113c material can for gold, silver,
The inert metals such as copper, platinum can also be the inorganic compounds such as aluminum oxide, iron oxide, zinc oxide, magnesia, calcium oxide, can also
For PP (polypropylene), PE (polyethylene), PET (poly terephthalic acid class plastics), ethylene oxide, propylene oxide, polyoxyethylene, gather
Vinyl chloride, PEG (polyethylene glycol), polymethyl methacrylate, polyacrylonitrile, polyethylene glycol dimethyl ether, gathers MEEP (polyphosphazene)
The organic matters such as vinylidene, butadiene-styrene rubber, carboxymethyl cellulose, polystyrene acid.
Protection component 113c can be fixed on the surface of explosion rupture disk 113b by way of spraying or being bonded.
Protect component 113c with a thickness of 0.01mm-3mm.If the thickness of component 113c is protected to be less than 0.01mm,
It protects the protective capability of component 113c limited, protection component 113c and electrolyte can not be adequately isolated.If protecting component
The thickness of 113c is greater than 3mm, then protection component 113c the space occupied is larger, reduces the energy density of battery cell 11；Separately
Outside, blocked up protection component 113c also will increase the intensity of explosion rupture disk 113b, can not be timely when battery cell 11 sharply produces gas
It breaks, causes security risk.
Preferably, the surface of the close electrode assembly 111 of explosion rupture disk 113b is completely covered in protection component 113c, will be explosion-proof
Piece 113b is completely separated with electrolyte, and explosion rupture disk 113b is avoided to be corroded.
When assembling cap assembly 113, first explosion rupture disk 113b can be welded on lamina tecti 113a, then again in explosion rupture disk
The surface sprays insulating material of 113b protects component 113c to be formed.Explosion rupture disk 113b and the junction of lamina tecti 113a are formed
Weldering print, and weld print and be easier to be corroded；It is therefore preferred that protection component 113c is also extended on lamina tecti 113a and is covered top
The junction of cover board 113a and explosion rupture disk 113b.
In the course of work of battery cell 11, pole piece can be expanded along its thickness direction；In coiled electrode assembly 111
In, the expansive force along the direction perpendicular to flat horizontal surface 111d is maximum.In stacked electrode assembly 111, along the first pole piece
Expansive force suffered by 111a and the second pole piece 111b stacking direction is maximum.
In the battery cell in the battery modules of the prior art, maximum swelling that electrode assembly 111 applies shell 112
The direction of power is all directed towards horizontal direction X.Due to size of the size compared to vertical direction Z of battery modules X in the horizontal direction
Much bigger, therefore, the battery modules of the prior art expansive force that X is subject in the horizontal direction is very big, and expansive force squeezes battery, makes
It can not work normally at battery, influence the service life of battery.
Preferably, the application can be by adjusting the arrangement mode of battery cell 11, to reduce battery modules in vertical direction Z
On size.Electrode assembly 111 is directed towards vertical direction Z to the direction for the maximum swelling power that shell 112 applies, and battery modules
Size on vertical direction Z is smaller, and therefore, compared with the prior art, the application can reduce the expansive force of battery modules, from
And battery cell is avoided to be subject to crushing.
Shell 112 includes that two first surface 112b and two second surface 112c, the area of first surface 112b are greater than
The area of second surface 112c；X is faced each other two second surface 112c in each battery cell 11 in the horizontal direction, each battery
Z is faced each other described two first surface 112b in monomer along the vertical direction.
Assembling battery modules and when cabinet 4, can on first surface 112b gluing, battery modules are then adhered to case
Body 4.The adhesive strength of battery Yu cabinet 4 can be improved in biggish first surface 112b.
In this application, the opening of shell 112 is located at one end of the Y in the width direction of shell 112, that is to say, that in each electricity
In pond monomer 11, cap assembly 113 is located at the side of the Y in the width direction of electrode assembly 111.Wherein, width direction Y is generally vertically
In vertical direction Z and horizontal direction X.
At this point, if not protecting component 113c, explosion rupture disk 113b can for a long time and electrolyte contacts, it is easy to be corroded and pass through
It wears, electrolyte is caused to leak, cause security risk.And the application protect component 113c can by explosion rupture disk 113b and electrolyte every
It opens, reduces the risk that explosion rupture disk 113b is corroded, improve security performance.
In battery modules, the electrode terminal 113d of adjacent cell monomer 11 can link together via busbar connector.In addition,
In order to acquire the information, such as voltage, temperature etc. of each battery cell 11 in battery modules, battery pack is equipped with harness plate 5, harness plate
5 are arranged close to the electrode terminal 113d of battery cell 11 and are connected with busbar connector.
In known battery modules, the electrode terminal of battery cell is usually located at battery cell along the vertical direction upper
End；Accordingly, busbar connector and harness the plate also upside in battery cell along the vertical direction need to set, leads to busbar connector and line
Beam plate occupies biggish space in the vertical direction.
And in this application, cap assembly 113 is located at one end of the Y in the width direction of battery cell 11, accordingly, referring to figure
1, the components such as busbar connector and harness plate 5 can be also arranged to the side of battery modules Y in the width direction, without in vertical direction
The upper occupied space of Z, to reduce the whole height of battery pack.
Each battery unit 1 includes multiple battery cells 11 of Z arrangement along the vertical direction.Preferably, the electricity of each battery unit 1
Pond monomer 11 is two or three.In order to improve the capacity of battery cell 11, the electrode assembly 111 of each battery cell 11 is preferably
Multiple and Z arrangement along the vertical direction.
The battery modules further include end plate 2 and band 3, and end plate 2 is set to the multiple battery unit 1 in the horizontal direction
The both ends of X, band 3 are looped around the periphery of the multiple battery unit 1 and end plate 2.
In known technology, the end plate in battery modules needs to bear biggish expansive force, so it needs biggish body
Product, causes the energy density of battery modules relatively low.And the application can reduce end by adjusting the arrangement mode of battery cell 11
The expansive force that plate 2 is born, therefore, the volume of end plate 2 can reduce accordingly, and then improve energy density.
Claims (10)
1. a kind of battery modules, which is characterized in that multiple battery units (1) including (X) in the horizontal direction arrangement, battery unit
(1) battery cell (11) is included at least；
Battery cell (11) includes electrode assembly (111), shell (112) and cap assembly (113), and shell (112) has opening,
Electrode assembly (111) is contained in shell (112)；Cap assembly (113) includes lamina tecti (113a), explosion rupture disk (113b) and protects
It protects component (113c), lamina tecti (113a) is connected to shell (112) and covers the opening of shell (112)；
Lamina tecti (113a) has through-hole, and explosion rupture disk (113b) is connected to lamina tecti (113a) and covers the logical of lamina tecti (113a)
Hole, protection component (113c) are set to the surface of the close electrode assembly (111) of explosion rupture disk (113b).
2. battery modules according to claim 1, which is characterized in that protection component (113c) material be gold, silver, copper,
Platinum, aluminum oxide, iron oxide, zinc oxide, magnesia, calcium oxide, polypropylene, polyethylene, poly terephthalic acid class plastics, ring
Oxidative ethane, propylene oxide, polyoxyethylene, polyvinyl chloride, polyphosphazene, polyethylene glycol, polymethyl methacrylate, polyacrylonitrile,
Polyethylene glycol dimethyl ether, Kynoar, butadiene-styrene rubber, carboxymethyl cellulose or polystyrene acid.
3. battery modules according to claim 1, which is characterized in that protection component (113c) with a thickness of 0.01mm-
3mm。
4. battery modules according to claim 1, which is characterized in that explosion rupture disk is completely covered in protection component (113c)
The surface of the close electrode assembly (111) of (113b).
5. battery modules according to claim 4, which is characterized in that protection component (113c) also extends into lamina tecti
On (113a) and cover the junction of lamina tecti (113a) and explosion rupture disk (113b).
6. battery modules according to any one of claims 1-5, which is characterized in that
Electrode assembly (111) include the first pole piece (111a), the second pole piece (111b) and be set to the first pole piece (111a) and
Diaphragm (111c) between second pole piece (111b)；
Electrode assembly (111) be takeup type structure and be it is flat, the outer surface of electrode assembly (111) includes two flat horizontal surfaces
(111d), two flat horizontal surfaces (111d) face each other along the vertical direction (Z)；Or, electrode assembly (111) is laminated structure, the
One pole piece (111a), diaphragm (111c) and the second pole piece (111b) are laminated along the vertical direction (Z)；
Shell (112) includes two first surfaces (112b) and two second surfaces (112c), the area of first surface (112b)
Greater than the area of second surface (112c)；Two second surfaces (112c) in each battery cell (11) (X) phase in the horizontal direction
It mutually faces, described two first surfaces (112b) in each battery cell face each other along the vertical direction (Z).
7. battery modules according to claim 6, which is characterized in that each battery unit (1) is arranged including (Z) along the vertical direction
Multiple battery cells (11) of column.
8. battery modules according to claim 7, which is characterized in that battery cell (11) has multiple electrodes component
(111), multiple electrodes component (111) is stacked along the vertical direction (Z).
9. battery modules according to claim 6, which is characterized in that
The battery modules further include end plate (2) and band (3), and end plate (2) is set to the multiple battery unit (1) along level
The both ends in direction (X), band (3) are looped around the periphery of the multiple battery unit (1) and end plate (2).
10. a kind of battery pack, which is characterized in that including cabinet (4) and battery modules of any of claims 1-9,
Battery modules are multiple and are contained in cabinet (4).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920366304.8U CN209592092U (en) | 2019-03-21 | 2019-03-21 | Battery modules and battery pack |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920366304.8U CN209592092U (en) | 2019-03-21 | 2019-03-21 | Battery modules and battery pack |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209592092U true CN209592092U (en) | 2019-11-05 |
Family
ID=68374756
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920366304.8U Active CN209592092U (en) | 2019-03-21 | 2019-03-21 | Battery modules and battery pack |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN209592092U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2022205325A1 (en) * | 2021-04-01 | 2022-10-06 | 江苏时代新能源科技有限公司 | Battery cell, battery, power consuming apparatus, and battery cell fabrication method and device |
-
2019
- 2019-03-21 CN CN201920366304.8U patent/CN209592092U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2022205325A1 (en) * | 2021-04-01 | 2022-10-06 | 江苏时代新能源科技有限公司 | Battery cell, battery, power consuming apparatus, and battery cell fabrication method and device |
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