CN109994666A - Composite end plate and battery module - Google Patents
Composite end plate and battery module Download PDFInfo
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- CN109994666A CN109994666A CN201711484744.5A CN201711484744A CN109994666A CN 109994666 A CN109994666 A CN 109994666A CN 201711484744 A CN201711484744 A CN 201711484744A CN 109994666 A CN109994666 A CN 109994666A
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- rigid
- pinboard
- composite end
- battery stack
- stack composite
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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
- H01M50/50—Current conducting connections for cells or batteries
-
- 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
- H01M50/204—Racks, modules or packs for multiple batteries or multiple cells
- H01M50/207—Racks, modules or packs for multiple batteries or multiple cells characterised by their shape
- H01M50/209—Racks, modules or packs for multiple batteries or multiple cells characterised by their shape adapted for prismatic or rectangular cells
-
- 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
- H01M50/218—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders characterised by the material
- H01M50/22—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders characterised by the material of the casings or racks
- H01M50/222—Inorganic material
-
- 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
- H01M50/218—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders characterised by the material
- H01M50/22—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders characterised by the material of the casings or racks
- H01M50/222—Inorganic material
- H01M50/224—Metals
-
- 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
- H01M50/218—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders characterised by the material
- H01M50/22—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders characterised by the material of the casings or racks
- H01M50/227—Organic material
-
- 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
- H01M50/218—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders characterised by the material
- H01M50/22—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders characterised by the material of the casings or racks
- H01M50/229—Composite material consisting of a mixture of organic and inorganic materials
-
- 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
- H01M50/262—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders with fastening means, e.g. locks
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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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- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Inorganic Chemistry (AREA)
- Engineering & Computer Science (AREA)
- Composite Materials (AREA)
- Materials Engineering (AREA)
- Battery Mounting, Suspending (AREA)
Abstract
The invention relates to a composite end plate and a battery module. The composite end plate has first and second surfaces opposing each other in a thickness direction thereof, and includes: a rigid substrate and a rigid interposer laminated in a thickness direction; the rigid base plate comprises two opposite end parts in the width direction of the composite end plate and an intermediate fixing part arranged between the two end parts; the rigid adapter plate comprises two adapter parts opposite in the width direction and an accommodating part arranged between the two adapter parts, the rigid substrate and the adapter parts are made of different materials, and the adapter parts are exposed on the second surface and used for being connected and fixed with an external structural part; at least one part of the middle fixing part is accommodated in the accommodating part, and the rigid substrate is connected and fixed with the rigid adapter plate through the middle fixing part. When the composite end plate is applied to a battery module, the composite end plate can be firmly connected with the side plate, so that the expansion deformation acting force of the single battery is effectively counteracted, and the whole size of the battery module is prevented from being enlarged.
Description
Technical field
The present invention relates to battery technology fields, more particularly to a kind of battery stack composite end sheet and battery modules.
Background technique
With the development of technology, power battery will be used wider and wider, and is related to producing or live.Power battery is also referred to as two
Primary cell is rechargeable battery.Power battery is widely used.The power battery of low capacity can be used for small-sized electric car
, the power battery of high capacity can be used for Large Electric vehicle, such as hybrid vehicle or electric car.Power battery is in groups
In use, needing each power battery serial or parallel connection using busbar connector.Usually busbar connector and power battery is positive and negative
Pole is welded to connect.Each power battery includes multiple battery modules.Each battery modules include multiple single batteries and are used for
The end plate and side plate of fixed multiple single batteries.End plate and side plate are arranged around all single batteries.In the prior art, end plate is
One overall structure.End plate and side plate use aluminium.End plate and side plate are fixedly mounted by welding manner.With battery modules
Capacity is constantly promoted, and single battery itself can expand in some cases, so that expansive force can be applied to end plate and side plate,
This results in end plate and side plate to easily deform displacement, and then causes the welding seam failure between side plate and end plate.Therefore, traditional
Battery modules there is a problem of that structural strength is relatively low.
Summary of the invention
The embodiment of the present invention provides a kind of battery stack composite end sheet and battery modules.When battery stack composite end sheet is applied to battery modules, energy
It is enough securely to be connect with side plate, single battery dilatancy active force is effectively offset, battery modules overall dimensions is prevented to become larger, is promoted
Battery modules use process is safe and reliable.
On the one hand, the embodiment of the present invention proposes a kind of battery stack composite end sheet for battery modules, and battery stack composite end sheet has certainly
Opposite first surface and second surface on body thickness direction, first surface can be arranged towards the single battery of battery modules,
Battery stack composite end sheet includes: the rigid substrates that through-thickness is stacked and rigid pinboard；Rigid substrates are included in battery stack composite end sheet
Width direction on two opposite ends and the intermediate fixed part being set between two ends；Rigid pinboard is included in
Two opposite switching parts and the receiving portion being set between two switching parts in width direction, receiving portion have towards first
The material of the opening on surface, rigid substrates and switching part is different, and switching part is exposed to second surface and is used for and outer structural parts
It is connected and fixed；Wherein, at least part of intermediate fixed part is placed in receiving portion, and rigid substrates are by intermediate fixed part and just
Property pinboard is connected and fixed.
According to an aspect of an embodiment of the present invention, rigid substrates and switching part are metal material；Alternatively, rigid substrates
For non-metallic material, switching part is metal material.
According to an aspect of an embodiment of the present invention, receiving portion penetrates through rigid pinboard in the direction of the width, and centre is fixed
Portion matches with receiving portion shape, and being capable of through-thickness insertion receiving portion.
According to an aspect of an embodiment of the present invention, rigid pinboard includes ontology and to be embedded in intrinsic metal in advance pre-
Embedded part, receiving portion are set to ontology, and metal embedded part includes two opposite in the direction of the width free ends, and free end is extended
Main body is to form switching part.
According to an aspect of an embodiment of the present invention, metal embedded part further includes the centre between two free ends
Section, multiple connection reinforcement holes are provided on interlude, a part of ontology is filled in connection reinforcement hole.
According to an aspect of an embodiment of the present invention, first surface side is provided with confined planes, switching part on end
It is upper that second surface side is provided with positioning surface, confined planes and positioning face contact, so that rigid substrates are relative to rigid switching
Plate realizes positioning in a thickness direction.
According to an aspect of an embodiment of the present invention, end includes the supporting plane positioned at second surface side, switching part
On be exposed to second surface and be flush for the surface that is connected with outer structural parts with supporting plane.
According to an aspect of an embodiment of the present invention, surface and rigid pinboard shape of the intermediate fixed part backwards to first surface
Buffer gap is formed between surface at the bottom of receiving portion.
According to an aspect of an embodiment of the present invention, bond, intermediate fixed part and rigidity switching are set in buffer gap
Plate is bonded by bond.
According to an aspect of an embodiment of the present invention, intermediate fixed part includes that multiple short transverses along battery stack composite end sheet extend
Through hole.
According to an aspect of an embodiment of the present invention, rigid pinboard includes opposite in the short transverse of battery stack composite end sheet
Top and bottom, for receiving portion between top and bottom, rigid pinboard further includes the mounting portion for being set to top.
The battery stack composite end sheet of the embodiment of the present invention, including the rigid substrates and rigid pinboard being stacked.Rigid pinboard
It is connected and fixed with rigid substrates.Rigid pinboard includes switching part.Switching part is exposed to the second surface side of battery stack composite end sheet
Surface with side plate for being connected and fixed.Rigid pinboard realizes the switching of rigid substrates and outer structural parts, on the one hand, advantageous
According to the actual application, selecting the lesser material of density to fabricate rigid substrates, to realize the whole light of battery stack composite end sheet
Quantization, and then realize the whole lightweight of battery modules；On the other hand, rigid substrates can be fabricated with the high material of rigidity,
Guarantee that rigid substrates stress is not susceptible to deform.The switching part and side plate of rigid pinboard can use identical material, and
It can connect by welding each other.In this way, the switching part and side plate of rigid pinboard can connect by welding
Connect fixation, and the weld strength that the two is formed is big, tensile capacity is strong, so as to be able to bear bigger single battery swollen for battery stack composite end sheet
Bulging deformation power improves the structural reliability of battery modules entirety.
On the other hand, a kind of battery modules are provided according to embodiments of the present invention comprising: multiple single batteries, it is multiple
Single battery is arranged side by side；Fixed frame, is sheathed on the periphery of all single batteries, and fixed frame includes two and answers as above-mentioned
End plate and two side plates are closed, battery stack composite end sheet and side plate are successively arranged alternately around multiple single batteries, side plate and rigid connection
The switching part material of plate is identical and is connected and fixed with switching part.
Detailed description of the invention
The feature, advantage and technical effect of exemplary embodiment of the present are described below by reference to attached drawing.
Fig. 1 is the battery modules overall structure diagram of one embodiment of the invention；
Fig. 2 is the partial enlarged view in Fig. 1 at A；
Fig. 3 is the decomposition texture schematic diagram of one embodiment of the invention battery stack composite end sheet；
Fig. 4 is the overall structure diagram of the battery stack composite end sheet of one embodiment of the invention；
Fig. 5 is the schematic cross-sectional view of one embodiment of the invention battery stack composite end sheet；
Fig. 6 is the partial enlarged view in Fig. 5 at B；
Fig. 7 is the overlooking structure diagram of one embodiment of the invention battery stack composite end sheet；
Fig. 8 is the partial enlarged view in Fig. 7 at C；
Fig. 9 is the schematic cross-sectional view of one embodiment of the invention rigidity pinboard；
Figure 10 is the overall structure diagram of one embodiment of the invention metal embedded part.
In the accompanying drawings, the attached drawing is not drawn according to the actual ratio.
Description of symbols:
1, battery stack composite end sheet；1a, first surface；1b, second surface；
X, width direction；Y, thickness direction；Z, short transverse；
11, rigid substrates；11a, end；11b, intermediate fixed part；111, mounting hole；112, through hole；113, Zhi Chengping
Face；114, confined planes；
12, rigid pinboard；12a, switching part；12b, receiving portion；12c, positioning surface；120, central axes；121, ontology；
122, metal embedded part；122a, free end；122b, interlude；122c, connection reinforcement hole；123, mounting portion；
2, single battery；3, side plate；98, buffer gap；99, bond.
Specific embodiment
Embodiments of the present invention are described in further detail with reference to the accompanying drawings and examples.Following embodiment it is detailed
Thin description and attached drawing cannot be used to limit the scope of the invention for illustratively illustrating the principle of the present invention, i.e., of the invention
It is not limited to described embodiment.
In the description of the present invention, it should be noted that unless otherwise indicated, the meaning of " plurality " is two or two with
On；The orientation or positional relationship of the instructions such as term " on ", "lower", "left", "right", "inner", "outside" is merely for convenience of description originally
Invention and simplified description, rather than the device or element of indication or suggestion meaning must have a particular orientation, with specific side
Position construction and operation, therefore be not considered as limiting the invention.In addition, term " first ", " second " etc. are only used for describing
Purpose is not understood to indicate or imply relative importance.
In the description of the present invention, it is also necessary to which explanation is unless specifically defined or limited otherwise, term " installation ",
" connected ", " connection " shall be understood in a broad sense, for example, it may be being fixedly connected, may be a detachable connection, or integrally connect
It connects；It can be directly connected, it can also be indirectly connected through an intermediary.For the ordinary skill in the art, may be used
The concrete meaning of above-mentioned term in the present invention is understood depending on concrete condition.
For a better understanding of the present invention, it is carried out below with reference to Fig. 1 to Figure 10 battery stack composite end sheet 1 according to an embodiment of the present invention
Detailed description.
Fig. 1 schematically shows the battery modules overall structure of an embodiment.Fig. 2 is the partial enlargement in Fig. 1 at A
Figure.Fig. 3 schematically shows the decomposition texture of an embodiment battery stack composite end sheet 1.Fig. 4 schematically shows answering for an embodiment
Close the overall structure of end plate 1.Fig. 5 schematically shows the sectional structure of an embodiment battery stack composite end sheet 1.Fig. 6 is in Fig. 5 at B
Partial enlarged view.Fig. 7 schematically shows the plan structure of an embodiment battery stack composite end sheet 1.Fig. 8 is the part in Fig. 7 at C
Enlarged drawing.Fig. 9 schematically shows the sectional structure of an embodiment rigidity pinboard 12.Figure 10 schematically shows that one is real
Apply the overall structure of a metal embedded part 122.
Shown in referring to Figures 1 and 2, the battery stack composite end sheet 1 of the embodiment of the present invention is used for battery modules.The battery mould of the present embodiment
Group includes the battery stack composite end sheet 1 and two side plates 3 along 2, two embodiment of the present invention of multiple single batteries of direction arrangement.It is more
A single battery 2 forms an assembly.Two battery stack composite end sheets 1 are set to assembly along 2 orientation of single battery respectively
Opposite sides.Two side plates 3 are arranged along with the perpendicular direction interval of 2 orientation of single battery respectively, and respectively with two
Battery stack composite end sheet 1 is connected.Two battery stack composite end sheets 1 and two side plates 3 collectively form the fixed frame for fixed Combination body.
Multiple holes can be set on side plate 3, to mitigate own wt, and be conducive to the heat dissipation of auxiliary monomer battery 2.
The battery stack composite end sheet 1 of the present embodiment has scheduled width, thickness and height, can flexible choice according to actual needs
Size.Battery stack composite end sheet 1 has first surface 1a and second surface 1b opposite along the Y of thickness direction.Multiple single batteries 2
It is arranged side by side on the thickness direction Y of battery stack composite end sheet 1.When battery stack composite end sheet 1 is used for battery modules, the first surface of battery stack composite end sheet 1
1a can be arranged towards single battery 2, and usual first surface 1a is plane, with the big plane of the single battery 2 with square structure
Whole fitting avoids the shell for squeezing single battery 2.The second surface 1b of battery stack composite end sheet 1 is backwards to single battery 2 and towards outside
Environment.
Referring to shown in Fig. 3 and Fig. 4, the battery stack composite end sheet 1 of the embodiment of the present invention includes rigid substrates 11.The rigidity of the present embodiment
Substrate 11 includes opposite two end 11a on the width direction X of battery stack composite end sheet 1, and, be set to two end 11a it
Between intermediate fixed part 11b.The screw mounting hole of the short transverse Z extension along battery stack composite end sheet 1 is all had on two end 11a
111, screw easy to use passes through the mounting hole 111 and rigid substrates 11 is connected and fixed on outer structural parts, thus by battery
Mould group is connected to a fixed with outer structural parts.Optionally, the outer structural parts of the present embodiment can be for accommodating battery modules
Battery case.
The through hole that multiple short transverse Z along battery stack composite end sheet 1 extend is provided on the intermediate fixed part 11b of the present embodiment
112.Rigid substrates 11 include opposite top and bottom on short transverse Z.Each through hole 112 penetrates through rigid substrates 11
Top and bottom.On the one hand, 11 own wt of rigid substrates with through hole 112 is light, to advantageously reduce battery stack composite end sheet 1
Whole weight is conducive to the whole lightweight for promoting battery modules；On the other hand, with the rigid substrates 11 of through hole 112
Stiffness by itself is good, enhances itself non-deformability, can carry bigger stress without deforming；In another aspect, rigid base
The through hole 112 of plate 11 can be used as heat dissipation channel, and auxiliary can be carried out to the single battery 2 adjacent with rigid substrates 11 and is dissipated
Heat reduces the temperature of the single battery 2.Optionally, the cross-sectional shape of through hole 112 is round, rectangle or triangle.
The battery stack composite end sheet 1 of the present embodiment further includes rigid pinboard 12.Rigid substrates 11 and rigid pinboard 12 are along thickness
Direction Y is stacked.When battery stack composite end sheet 1 is applied to battery modules, rigid substrates 11 are set to rigid pinboard 12 and monomer electricity
Between pond 2, it is disposed adjacent with single battery 2.
The rigid pinboard 12 of the present embodiment includes two opposite switching part 12a and being set on width direction X
Receiving portion 12b between two switching part 12a.Switching part 12a extends along the short transverse Z of battery stack composite end sheet 1.Receiving portion 12b by
Rigid pinboard 12 is recessed to be formed towards second surface 1b backwards to the surface of second surface 1b.Receiving portion 12b has towards the first table
The opening of face 1a.At least part of the intermediate fixed part 11b of the rigid substrates 11 of the present embodiment is placed in receiving portion 12b,
And centre fixed part 11b is connected and fixed with rigid pinboard 12.The end 11a of rigid substrates 11 can be with rigid pinboard 12
The part of switching part 12a towards first surface 1a are in contact, so that end 11a provides spacing supporting to switching part 12a.
The part that the switching part 12a of the rigid pinboard 12 of the present embodiment is exposed to the side second surface 1b is used for and side plate
3 are connected and fixed.Switching part 12a, which is exposed to be bonded between the part of the side second surface 1b and side plate 3, to be contacted.Battery stack composite end sheet
1 be applied to battery modules when, a side plate 3 with one rigidity pinboard 12 switching part 12a be connected and fixed, another side plate 3
It is connected and fixed with another switching part 12a.In this way, side plate 3 passes through rigid pinboard under the switching effect of rigid pinboard 12
12 are connected and fixed with the realization of entire battery stack composite end sheet 1.
Referring to shown in Fig. 3, two switching part 12a are relative to rigid switching included by the rigid pinboard 12 of the present embodiment
The central axes 120 of plate 12 are symmetrical arranged.The central axes 120 extend on short transverse Z.Two switching part 12a are respectively by side
When the active force of plate 3, battery stack composite end sheet 1 is whole to be at force balance state, avoids battery stack composite end sheet 1 by 3 tensile stress of side plate
When effect, the rotating torque that a side on X generates in the width direction on battery stack composite end sheet 1 is greater than the rotation that another side generates
Torque, so that battery stack composite end sheet 1 rotates entirely around central axes 120, the integral position for improving battery stack composite end sheet 1 is stablized
Property.
The switching part 12a of the rigid pinboard 12 of the present embodiment is different from the material of rigid substrates 11.Optionally, rigid base
Plate 11 and switching part 12a are metal material；Alternatively, rigid substrates 11 are non-metallic material, switching part 12a is metal material.
The switching part 12a of rigid pinboard 12 is identical as 3 material of side plate.The free end of two side plates 3 can be turned down to battery stack composite end sheet 1
The side second surface 1b, and with the switching part 12a of rigid pinboard 12 be exposed to the side second surface 1b part welding connect
It connects.When single battery 2 expands deformation, dilatancy power can tension side plates 3 so that side plate 3 is primarily subjected to tensile stress.Two
After a side plate 3 and two battery stack composite end sheets 1 are connected and fixed, side plate 3 can tense multiple single batteries 2 by battery stack composite end sheet 1 simultaneously,
The dilatancy power generated when single battery 2 expands can be offset.
In one embodiment, the switching part 12a of side plate 3 and rigid pinboard 12 is steel material, so that the two can be with
It is connected and fixed by welding, connection type is simple to operation.When the side plate 3 of battery modules is steel material, due to steel
Itself yield strength is big, therefore when the expansive force of single battery 2 is acted on side plate 3, is less than steel to the stress that side plate 3 generates
Yield strength, to effectively ensure that side plate 3 will not generate biggish stretcher strain.In this way, using the battery of steel side plate 3
Modular structure effectively can prevent battery modules from deforming, to guarantee that the length of battery modules itself meets design requirement.It is preferred that
The switching part 12a of ground, side plate 3 and rigid pinboard 12 is stainless steel, and bonding strength is high, and corrosion resistance is good.
In this implementation, be the side plate 3 of steel material and the switching part 12a of rigid pinboard 12 be welded to each other after form connection
The high weld part of intensity.In this way, the weld joint strength that the switching part 12a of side plate 3 and rigid pinboard 12 is formed is high, weldering is improved
Tension stress ability is stitched, so that battery stack composite end sheet 1 is able to bear bigger 2 dilatancy power of single battery, single battery 2 is avoided to send out
The dilatancy power generated when raw dilatancy easily pulls open the weld part, and the structure for improving battery modules entirety is reliable
Property, effectively the outer dimension of battery modules is prevented to be acted on and change by 2 dilatancy of single battery.It is to be appreciated that
The switching part 12a of side plate 3 and rigid pinboard 12 can also be other same metal materials for meeting bonding strength requirement.
In the embodiment of the present invention, since the switching part 12a that battery stack composite end sheet 1 passes through rigid pinboard 12 is connected with side plate 3,
Therefore the material selection of rigid substrates 11 is more flexible.In turning for the side plate 3 and rigid pinboard 12 for selecting same metal material
Under the premise of coupling stiffness between socket part 12a is met the requirements, the material of rigid substrates 11 can be the lesser material of density.It can
Selection of land, the materials of rigid substrates 11 can be engineering plastics, glass reinforced plastic or carbon fiber etc., whole so as to mitigate battery stack composite end sheet 1
Body weight promotes the lightweight of battery modules.Optionally, the material of rigid substrates 11 may be aluminum or aluminum alloy, thus just
Property substrate 11 stiffness by itself it is high, be also convenient for using extrusion forming and the machining processing and manufacturing for completing rigid substrates 11.
In one example, the material of rigid substrates 11 is aluminium, the material of side plate 3 and the switching part 12a of rigid pinboard 12
Matter is steel, and not only rigid substrates 11 have good rigidity, can carry bigger stress without deforming, and rigidity turns
The switching part 12a and 3 weld strength of side plate of fishplate bar 12 are high, can carry bigger stress without separating, and then ensure that
The bonding strength of battery stack composite end sheet 1 and side plate 3.
The rigid substrates 11 of the present embodiment are to be detachably connected with rigid pinboard 12, and rigid substrates 11 and rigidity is facilitated to turn
Fishplate bar 12 individually fabricates, and is then assembled again, while being also convenient for replacing or safeguarding rigid pinboard 12.
Optionally, the receiving portion 12b interference being arranged on the intermediate fixed part 11b of rigid substrates 11 and rigid pinboard 12 is matched
It closes.The pressure of second surface 1b is directed toward from first surface 1a by applying to rigid substrates 11, by the centre of rigid substrates 11
Fixed part 11b is gradually pushed into the predetermined position in receiving portion 12b, realizes being connected and fixed for the two with this.In rigid substrates 11
Between fixed part 11b can not be moved relative to rigid pinboard 12.In this way, rigid pinboard 12 and rigid substrates 11 assembled
Journey is convenient, and required assembling procedure is few, can be improved assembly working efficiency.In one example, rigid substrates 11 is intermediate fixed
The thickness of portion 11b is identical as the depth of receiving portion 12b, so as to sink to receiving portion 12b completely.
In one example, as shown in figure 3, receiving portion 12b penetrates through rigid pinboard 12 on width direction X, to hold
Portion 12b is received for a through slot on width direction X and forms two on width direction X and is open.The switching part of rigid pinboard 12
12a close to opening setting and switching part 12a relative to opening closer to second surface 1b.The intermediate fixed part of rigid substrates 11
11b matches with receiving portion 12b shape, and can be snapped in receiving portion 12b.On short transverse Z, in rigid substrates 11
Between fixed part 11b size be slightly larger than receiving portion 12b size, so that centre fixed part 11b can match with receiving portion 12b interference
It closes, so that rigid substrates 11 and rigid pinboard 12 are connected and fixed.The intermediate fixed part 11b of rigid substrates 11 can not be in height side
It is moved on Z.
In one example, on the top surface of rigid substrates 11 with region corresponding to intermediate fixed part 11b towards rigid substrates
11 bottom surface is recessed and forms recess portion.The intermediate fixed part 11b of rigid substrates 11 is inserted into the receiving portion 12b of rigid pinboard 12
Afterwards, a part of rigid pinboard 12 is located in recess portion, thus on the width direction X of battery stack composite end sheet 1, the two of rigid substrates 11
A end 11a can be avoided rigid substrates 11 from moving on width direction X by the limit of rigid pinboard 12.In this way,
On the short transverse Z and width direction X of battery stack composite end sheet 1, rigid substrates 11 can not all occur relative to rigid pinboard 12
It is mobile, the connective stability of rigid substrates 11 and rigid pinboard 12 is improved, avoids at least one of the two by external force
When and offset, influence the overall stability of battery stack composite end sheet 1.
Optionally, the intermediate fixed part 11b of rigid substrates 11 and rigid pinboard 12 pass through fastener (not shown)
It is connected and fixed.After in the receiving portion 12b that the intermediate fixed part 11b of rigid substrates 11 is inserted into rigid pinboard 12, pass through fastening
Part connects rigid pinboard 12 and rigid substrates 11, to improve rigid pinboard 12 and 11 bonding strength of rigid substrates.
In one example, intermediate fixed part 11b includes opposite two datum levels on short transverse Z.Fastener packet
Include the buckle and card slot snapped connection.Buckle is set on two datum levels of intermediate fixed part 11b and has elasticity.Card slot
Rigid pinboard 12 is set to be formed on the surface of receiving portion 12b and be connected with receiving portion 12b.Intermediate fixed part 11b grafting
When receiving portion 12b, the buckle on intermediate fixed part 11b can be sprung into card slot, with rigid pinboard 12 and the rigid base of locking
Plate 11.In this way, rigid pinboard 12 and 11 connection procedure of rigid substrates are convenient and efficient, easy to operate, connection status is stablized.
In one example, the screw thread of through-thickness Y extension is provided on the intermediate fixed part 11b of rigid substrates 11
Hole.The through-hole of through-thickness Y extension is provided on rigid pinboard 12.The intermediate fixed part 11b and rigidity of rigid substrates 11
After the receiving portion 12b cooperation of pinboard 12, threaded hole and through-hole alignment.The screw rod of screw passes through the through-hole on rigid pinboard 12
It is threadedly coupled again with the threaded hole of intermediate fixed part 11b, completes locking.Further, through-hole is stepped hole, thus the spiral shell of screw
Cap can sink to rigid pinboard 12, and at least part of nut is avoided to protrude and interfere with other components.
Shown in referring to figure 5 and figure 6, backwards to first surface 1a on the intermediate fixed part 11b of the rigid substrates 11 of the present embodiment
Surface and rigid pinboard 12 on form receiving portion 12b bottom surface between there is preset distance, to be formed between buffering
Gap 98.When single battery 2 expands deformation, dilatancy power can be such that rigid substrates 11 occur centainly towards rigid connection plate 12
Deformation.The buffer gap 98 can absorb the deflection of rigid substrates 11, avoid the deformation due to rigid substrates 11 and cause
The outer dimension of battery modules changes.The surface that the bottom of receiving portion 12b is formed on rigid pinboard 12 is rigidity switching
Backwards to the surface of second surface 1b on plate 12.
In one embodiment, the intermediate fixed part 11b of the rigid substrates 11 of battery stack composite end sheet 1 and rigid pinboard pass through viscous
Fitting 99 is bonded.Bond 99 is set in buffer gap 98.Optionally, bond 99 is bonded adhesives.In rigid substrates 11
It is coated in advance on the outer surface of the intermediate rigid pinboard 12 of fixed part 11b direction and/or the surface for the bottom for forming receiving portion 12b
Then intermediate fixed part 11b is inserted into receiving portion 12b by bonded adhesives again.After ageing treatment, the centre of rigid substrates 11
Fixed part 11b and rigid pinboard 12 being capable of bonding connections securely.Further, the bonded adhesives after solidification is filled up completely buffering
Gap 98 can also be partially filled with buffer gap 98.Further, the bonded adhesives after solidification has elasticity, avoids weakening slow
Rush the cushion performance in gap 98.Optionally, bond 99 is also possible to double-sided adhesive, can equally make the centre of rigid substrates 11 solid
It is Nian Jie with rigid pinboard 12 to determine portion 11b.
In one embodiment, the intermediate fixed part 11b of rigid substrates 11 has sunk area.Sunk area is solid by centre
Determine portion 11b and be located at the surface of the side second surface 1b to be recessed to be formed towards first surface 1a.The intermediate fixed part 11b of rigid substrates 11
After insertion is rigidly connected in the receiving portion 12b of plate 12 and end 11a is in contact with switching part 12a, which constructs to be formed
Buffer gap 98.
Referring to shown in Fig. 5 to Fig. 8, there are confined planes 114 on the end 11a of the rigid substrates 11 of the present embodiment.The limit
Face 114 is formed by end 11a backwards to the surface of the side first surface 1a.There is positioning on the switching part 12a of rigid pinboard 12
Face 12c.Positioning surface 12c is formed by the surface on switching part 12a backwards to the side first surface 1a.The centre of rigid substrates 11 is solid
Determine the confined planes 114 after portion 11b is inserted into the receiving portion 12b of rigid pinboard 12, being arranged on the 11a of end and switching part 12a
Positioning surface 12c is in contact, so that it is fixed that switching part 12a can be formed rigid substrates 11 on the thickness direction of battery stack composite end sheet 1
Rigid substrates 11 and rigid pinboard are improved so that rigid substrates 11 are accurately inserted into the predetermined position in receiving portion 12b in position
12 packaging efficiencies and connective stability.
In one embodiment, the confined planes 114 being arranged on the 11a of end are plane.Confined planes 114 are simultaneously in width direction
Extend on X and thickness direction Y, to form the tapered plane intersected with second surface 1b.The positioning surface 12c being arranged on switching part 12a
It also is plane.Confined planes 114 and positioning surface 12c extend on width direction X and thickness direction Y simultaneously, to be formed and second
The tapered plane of surface 1b intersection.In this way, rigid substrates 11 are relative to rigid pinboard 12 on width direction X and thickness direction Y
Positioning is realized simultaneously.
The end 11a of the present embodiment includes the supporting plane 113 positioned at the side second surface 1b.Switching part 12a is backwards to the
The surface of one surface 1a with outer structural parts for being connected and being flush with supporting plane 113.In this way, side plate 3 and switching part
When 12a is connected and fixed, switching part 12a is avoided to jack up side plate 3, so that one end of side plate 3 is tilted and is influenced welding, to have
It is subjected to conducive to side plate 3 and switching part 12a.In addition, the switching part 12a of one end of side plate 3 and rigid pinboard 12
When being connected and fixed, side plate 3 can be contacted simultaneously with supporting plane 113 and switching part 12a backwards to the surface of first surface 1a, be avoided
Side plate 3 is jacked up and leads between side plate 3 and supporting plane 113 that there are gaps by switching part 12a, to increase side plate 3 and just
Property substrate 11 forced area so that the whole stress of battery stack composite end sheet 1 is more balanced.
In one embodiment, rigid pinboard 12 generally steel material.A part of rigid pinboard 12 forms switching
Portion 12a.Pass through molding or machining mode processing and manufacturing.In this way, switching part 12a's included by rigid pinboard 12 is whole rigid
Degree is strong, and non-deformability is strong.
In one embodiment, shown in referring to figure 5 and figure 6, rigid pinboard 12 is including ontology 121 and is embedded in ontology in advance
Metal embedded part 122 in 121.Receiving portion 12b is set on ontology 121, thus the intermediate fixed part 11b energy of rigid substrates 11
It is enough inserted into receiving portion 12b, and is connected and fixed with ontology 121.Shown in further referring to figure 9, metal embedded part 122 is included in width
Two opposite free end 122a on the X of direction.Free end 122a extends main body to form switching part 12a.Rigid pinboard 12
Ontology 121 material and metal embedded part 122 material it is different.Optionally, the material of the ontology 121 of rigid pinboard 12 is
Plastics.The material of metal embedded part 122 is steel and is plate structure.By the ontology of rigid pinboard 12 by the way of injection molding
121 and metal embedded part 122 be connected and fixed, the two bonding strength is high.Ontology 121 is manufactured using plastic processing simultaneously, is conducive to
The overall weight for mitigating battery stack composite end sheet 1, can be realized the lightweight of battery stack composite end sheet 1.Optionally, the ontology of rigid pinboard 12
121 material is aluminium.The material of metal embedded part 122 is steel and is plate structure.The two has been configured to by way of molding
Whole rigid pinboard 12.
In addition to two free end 122a of metal embedded part 122 are exposed to ontology 121, metal embedded part 122 remaining
Part is embedded into ontology 121.Further, a part of ontology 121 extends to free end 122a backwards to second surface 1b's
Side can be bonded contact in free end 122a and provide bearing on thickness direction Y for free end 122a.
In one embodiment, it on short transverse Z, is provided on the region of the two sides receiving portion 12b on ontology 121
Lightening hole.Lightening hole is recessed towards second surface 1b by the surface for being located at the side first surface 1a on ontology 121 and is formed.
In one embodiment, referring to shown in Fig. 9 and Figure 10, metal embedded part 122 further includes being located at two free ends
Interlude 122b between 122a.Interlude 122b integral built-in is in ontology 121.Multiple connections are provided on interlude 122b
Reinforced hole 122c.Using being molded or when molding process completes the processing and manufacturing of rigid pinboard 12, the ontology 121 after sizing
A part is filled in the connection reinforcement hole 122c being arranged on metal embedded part 122, so that ontology 121 and interlude 122b are mutual
It is connected, improves the bonding strength of ontology 121 and metal embedded part 122.
The rigid pinboard 12 of the embodiment of the present invention includes opposite top and bottom in the short transverse of battery stack composite end sheet.
Receiving portion 12b is set between top and bottom.Rigid pinboard 12 further includes the mounting portion 123 being set on top.The peace
Dress portion 123 is for installing fixed exterior components, so that exterior components are connected with battery stack composite end sheet 1.In one embodiment,
Mounting portion 123 is cavernous structure.Nut can be installed in the mounting portion 123.The output stage of battery modules can pass through screw
It is connected and fixed with the nut.
The battery stack composite end sheet of the embodiment of the present invention, including the rigid substrates 11 and rigid pinboard 12 being stacked.Rigidity turns
Fishplate bar 12 is connected and fixed with rigid substrates 11.Rigid pinboard 12 includes switching part 12a.Switching part 12a is exposed to battery stack composite end sheet 1
The side second surface 1b surface for being connected and fixed with side plate 3.Rigid pinboard 12 realizes rigid substrates 11 and outside
The switching of structural member, on the one hand, be conducive to according to the actual application, the lesser material of density be selected to fabricate rigid substrates
11, to realize the whole lightweight of battery stack composite end sheet 1, and then realize the whole lightweight of battery modules；It on the other hand, can be with rigidity
High material fabricates rigid substrates 11, guarantees that 11 stress of rigid substrates is not susceptible to deform.The switching of rigid pinboard 12
Portion 12a and side plate 3 can use identical material, and can connect by welding each other.In this way, rigid pinboard
12 switching part 12a and side plate 2 can be connected and fixed by welding, and the weld strength that the two is formed is big, tension energy
Power is strong, so that battery stack composite end sheet 1 is able to bear bigger single battery dilatancy power, the structure for improving battery modules entirety is reliable
Property.
The embodiment of the present invention also provides a kind of battery modules comprising multiple single batteries 2 and fixed frame.Multiple lists
Body battery 2 is arranged side by side along a direction.Fixed frame be sheathed on the periphery of all single batteries 2 with by multiple single batteries 2 into
Row is fixed.Fixed frame includes the battery stack composite end sheet 1 of two side plates 3 and two above-described embodiments.Multiple single batteries 2 form one
A assembly.Assembly is each provided with a battery stack composite end sheet 1 along the opposite two sides of the orientation of single battery 2.
The first surface 1a of the battery stack composite end sheet 1 of the present embodiment is arranged towards single battery 2.Battery stack composite end sheet 1 and side plate 3 surround institute
There is single battery 2 to be successively arranged alternately.Assembly is each provided with one along the two sides perpendicular with the orientation of single battery 2
A side plate 3.Battery stack composite end sheet 1 and side plate 3 are successively arranged alternately around all single batteries 2.Turn of side plate 3 and rigid pinboard 12
The material of socket part 12a is identical.Two battery stack composite end sheets 1 for being set to multiple 2 two sides of single battery are connected by two side plates 3.
Optionally, each side plate 3 is in U-shape structure, and both ends are turned down to the side second surface 1b, and the switching part with rigid pinboard 12
12a is connected and fixed.
In this way, the switching part 12a and side plate 3 of rigid pinboard 12 can be connected and fixed by welding, while two
Person welds that the weld strength to be formed is big, and then is able to bear the bigger dilatancy power generated from single battery expansion, has
Effect reduces battery stack composite end sheet 1 towards the amount of movement or deflection in the direction far from single battery, and the structure for improving battery modules entirety can
By property.In one embodiment, the material of the switching part 12a of side plate 3 and rigid pinboard 12 is steel, the material of rigid substrates 11
Matter is aluminium.Preferably, the material of side plate 2 and rigid pinboard 12 is stainless steel.
Although by reference to preferred embodiment, invention has been described, the case where not departing from the scope of the present invention
Under, various improvement can be carried out to it and can replace component therein with equivalent.Especially, as long as there is no structures to rush
Prominent, items technical characteristic mentioned in the various embodiments can be combined in any way.The invention is not limited to texts
Disclosed in specific embodiment, but include all technical solutions falling within the scope of the claims.
Claims (10)
1. a kind of battery stack composite end sheet for battery modules, the battery stack composite end sheet has the first table opposite on thickness direction
Face and second surface, the first surface can be arranged towards the single battery of the battery modules, which is characterized in that described multiple
Closing end plate includes:
The rigid substrates and rigid pinboard being stacked along the thickness direction；
The rigid substrates include opposite two ends in the width direction of the battery stack composite end sheet and are set to two institutes
State the intermediate fixed part between end；
The rigidity pinboard includes two opposite in the width direction switching parts and is set to two switchings
Receiving portion between portion, described accommodation section have the opening towards the first surface, the rigid substrates and the switching part
Material it is different, the switching part is exposed to the second surface and for being connected and fixed with outer structural parts；
Wherein, at least part of the intermediate fixed part is placed in described accommodation section, and the rigid substrates pass through in described
Between fixed part be connected and fixed with the rigid pinboard.
2. battery stack composite end sheet according to claim 1, it is characterised in that:
The rigid substrates and the switching part are metal material；Alternatively,
The rigid substrates are non-metallic material, and the switching part is metal material.
3. battery stack composite end sheet according to claim 1, which is characterized in that described accommodation section penetrates through institute in the width direction
Rigid pinboard is stated, the intermediate fixed part matches with described accommodation section shape, and can be inserted into institute along the thickness direction
State receiving portion.
4. battery stack composite end sheet according to claim 1, which is characterized in that the rigidity pinboard includes ontology and is embedded in advance
The intrinsic metal embedded part, described accommodation section are set to the ontology, and the metal embedded part is included in the width
The main body is extended to form the switching part in two opposite free ends, the free end on direction.
5. battery stack composite end sheet according to claim 4, which is characterized in that the metal embedded part further includes being located at described in two
Interlude between free end is provided with multiple connection reinforcement holes on the interlude, and a part of the ontology is filled in institute
State connection reinforcement hole.
6. battery stack composite end sheet according to any one of claims 1 to 5, which is characterized in that backwards to described first on the end
Surface side is provided with confined planes, and the second surface side is provided with positioning surface, the confined planes on the switching part
With the positioning face contact, determine so that the rigid substrates are realized on the thickness direction relative to the rigid pinboard
Position.
7. battery stack composite end sheet according to any one of claims 1 to 5, which is characterized in that the end includes being located at described the
The supporting plane on two surfaces side is exposed to the second surface on the switching part and for being connected with the outer structural parts
The surface connect is flush with the supporting plane.
8. battery stack composite end sheet according to any one of claims 1 to 5, which is characterized in that the intermediate fixed part is backwards to described
Buffer gap is formed between the surface for the bottom that the surface of first surface and the rigid pinboard form described accommodation section.
9. battery stack composite end sheet according to claim 8, which is characterized in that bond is set in the buffer gap, it is described in
Between fixed part and the rigid pinboard be bonded by the bond.
10. a kind of battery modules characterized by comprising
Multiple single batteries, multiple single batteries are arranged side by side；
Fixed frame, is sheathed on the periphery of all single batteries, and the fixed frame includes two such as claim 1 to 9
Described in any item battery stack composite end sheets and two side plates, the battery stack composite end sheet and the side plate around multiple single batteries according to
Secondary to be arranged alternately, the side plate is identical as the rigid connection switching part material of plate and connect with the switching part solid
It is fixed.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711484744.5A CN109994666B (en) | 2017-12-29 | 2017-12-29 | Composite end plate and battery module |
| PCT/CN2018/119126 WO2019128640A1 (en) | 2017-12-29 | 2018-12-04 | Composite end plate and battery module |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711484744.5A CN109994666B (en) | 2017-12-29 | 2017-12-29 | Composite end plate and battery module |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109994666A true CN109994666A (en) | 2019-07-09 |
| CN109994666B CN109994666B (en) | 2020-11-06 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711484744.5A Active CN109994666B (en) | 2017-12-29 | 2017-12-29 | Composite end plate and battery module |
Country Status (2)
| Country | Link |
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| CN (1) | CN109994666B (en) |
| WO (1) | WO2019128640A1 (en) |
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| WO2021031762A1 (en) * | 2019-08-20 | 2021-02-25 | 宁德时代新能源科技股份有限公司 | Battery module, battery pack, and apparatus using battery cell |
| CN115084770A (en) * | 2022-07-20 | 2022-09-20 | 天津市捷威动力工业有限公司 | Combined battery module middle fixing device and battery module |
| CN115189084A (en) * | 2022-07-21 | 2022-10-14 | 天津市捷威动力工业有限公司 | Battery module end plate, battery module and power battery |
| CN115832554A (en) * | 2021-10-18 | 2023-03-21 | 宁德时代新能源科技股份有限公司 | Battery module end plate, battery module and preparation method of battery module end plate |
| JP7501454B2 (en) | 2021-06-11 | 2024-06-18 | トヨタ自動車株式会社 | Battery case |
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| CN114552110A (en) * | 2020-11-26 | 2022-05-27 | 比亚迪股份有限公司 | Battery pack and vehicle |
| CN115832557A (en) * | 2021-10-26 | 2023-03-21 | 宁德时代新能源科技股份有限公司 | Battery pack support, manufacturing method thereof, battery and power utilization device |
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Also Published As
| Publication number | Publication date |
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| CN109994666B (en) | 2020-11-06 |
| WO2019128640A1 (en) | 2019-07-04 |
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