CN209963117U - Battery pack and vehicle - Google Patents
Battery pack and vehicle Download PDFInfo
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- CN209963117U CN209963117U CN201920979160.3U CN201920979160U CN209963117U CN 209963117 U CN209963117 U CN 209963117U CN 201920979160 U CN201920979160 U CN 201920979160U CN 209963117 U CN209963117 U CN 209963117U
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- battery pack
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- box body
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/04—Construction or manufacture in general
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/50—Manufacturing or production processes characterised by the final manufactured product
Abstract
The utility model relates to a battery package and vehicle, wherein, the battery package includes box subassembly (1), and box subassembly (1) includes box (11) and fixed beam (12), fixed beam (12) are fixed in box (11); the battery monomer (2) is arranged in the box body (11); and a restricting member (3) that covers the battery cell (2) and closes an open end of the case (11), and the restricting member (3) is fixed to the fixing beam (12). The battery pack is provided with the constraint part and fixed with the fixed beam, when the battery monomer expands, stable and effective pressing force can be provided for the battery monomer, the expansion deformation degree of the battery monomer is reduced, and the sealing performance of the battery pack is improved; in addition, the restricting component can seal the opening end of the box body, so that an outer cover is omitted, the structure of the battery pack can be simplified, the thickness of the battery pack is reduced, and the weight of the battery pack is reduced.
Description
Technical Field
The utility model relates to a battery technology field especially relates to a battery package and vehicle.
Background
In recent years, rechargeable batteries have been widely used to power vehicles. A plurality of rechargeable batteries are connected in series, parallel or series-parallel to achieve a larger capacity or power.
In the actual use process, the area of the outer cover of the battery pack is large, the rigidity is poor, and the battery monomer expands in the charging and discharging process, so that the outer cover of the battery pack deforms greatly. After the outer cover of the battery pack deforms, the sealing performance of the outer cover and the box body can be reduced, so that external water vapor enters the battery pack to cause a short circuit problem; and since the cover of the battery pack may be pushed against other parts of the vehicle after being deformed, it is difficult to remove and replace the battery pack from and to the vehicle when the battery pack needs to be removed from the vehicle for maintenance.
SUMMERY OF THE UTILITY MODEL
An embodiment of the utility model provides a battery package and vehicle can improve the leakproofness of battery package.
According to an aspect of the utility model, a battery pack is provided, include:
the box body assembly comprises a box body and a fixed beam, and the fixed beam is fixed in the box body;
the battery monomer is arranged in the box body; and
and the constraint component covers the battery monomer and closes the opening end of the box body, and is fixed with the fixed beam.
In some embodiments, the fixing beam divides the box body into a plurality of accommodating cavities, the battery pack includes a plurality of battery cells, each battery cell is divided into a plurality of groups in a plane perpendicular to the height direction, and each group of battery cells has at least two battery cells and is respectively arranged in different accommodating cavities.
In some embodiments, the battery pack includes a plurality of fixing beams, and the fixing beams are disposed on both sides of each group of battery cells along the grouping direction.
In some embodiments, the individual battery cells are grouped along a length direction of the battery pack, and the fixing beam extends along a width direction of the battery pack; and/or
The battery cells are grouped in the width direction of the battery pack, and the fixing beam extends in the length direction of the battery pack.
In some embodiments, the battery pack includes a restraining member comprising:
the plurality of limiting parts are respectively covered on the battery monomers of different groups; and
the first installation part is connected to the side part of the limiting part along the grouping direction of the battery cells, and the first installation part is fixed with the fixing beam at the corresponding position.
In some embodiments, a fixing beam is arranged between two adjacent groups of battery cells, and a first mounting portion is arranged between two adjacent limiting portions.
In some embodiments, the battery pack includes a plurality of restraining members, each of which covers a different group of the battery cells, respectively, the restraining members including:
the limiting part is covered on the battery monomer of the corresponding group; and
the first installation part is connected to the side part of the limiting part along the grouping direction of the battery cells, and the first installation part is fixed with the fixing beam at the corresponding position.
In some embodiments, the constraining member further comprises a second mounting portion,
the second mounting part is connected to the side edge, far away from the limiting part, of the first mounting part on the outermost side and is fixed with the box body; and/or
The second installation part is connected to the outer side edge of the limiting part on the outermost side and fixed with the box body.
In some embodiments, the whole of the position limiting part protrudes relative to the first mounting part in a direction away from the battery cell.
In some embodiments, the top surface of the fixing beam is higher than the top surface of the case, and the bottom surface of the first mounting portion is higher than the bottom surface of the second mounting portion.
In some embodiments, the battery pack further comprises:
the first installation part is arranged between the pressing strip and the fixed beam, and the fastener penetrates through the pressing strip and the first installation part and is fixed with the fixed beam so as to fix the first installation part on the fixed beam.
In some embodiments, the battery pack further includes a sealing member provided between the constraining member and the case so as to close the open end of the case.
In some embodiments, an adhesive layer is arranged between the battery cell at the bottommost layer and the inner bottom surface of the box body; and/or the presence of a gas in the gas,
an adhesive layer is arranged between two adjacent battery monomers in each group of battery monomers; and/or the presence of a gas in the gas,
an adhesive layer is arranged between the constraint component and the battery monomer on the topmost layer.
In some embodiments, the battery cell includes:
a housing; and
an electrode assembly disposed within the housing, the electrode assembly including a first pole piece, a second pole piece, and a separator disposed between the first pole piece and the second pole piece;
the electrode assembly is of a winding structure and is flat, the outer surface of the electrode assembly comprises two flat surfaces, and the two flat surfaces are oppositely arranged along the height direction; alternatively, the first and second electrodes may be,
the electrode assembly is of a laminated structure, and the first pole piece and the second pole piece are stacked in the height direction.
According to another aspect of the present invention, there is provided a vehicle, including:
a vehicle main body; and
the battery pack of the above embodiment, the battery pack is provided to the vehicle main body.
Based on the technical scheme, the battery pack of the embodiment of the utility model, through setting the constraint part and fixing with the fixed beam, when the battery monomer expands, can provide stable and effective pressing force for the battery monomer, reduce the expansion deformation degree of the battery monomer, so as to improve the sealing performance of the battery pack; in addition, the restricting component can seal the opening end of the box body, so that an outer cover is omitted, the structure of the battery pack can be simplified, the thickness of the battery pack is reduced, and the weight of the battery pack is reduced.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the invention and together with the description serve to explain the invention without undue limitation to the invention. In the drawings:
fig. 1 is an exploded view of one embodiment of a battery pack of the present invention;
fig. 2 is a schematic structural view of a case assembly of the battery pack shown in fig. 1;
FIG. 3 is a schematic structural view of one embodiment of a restricting member in the battery pack shown in FIG. 1;
FIG. 4 is a schematic view of the battery pack of FIG. 1 with the restraint member disengaged;
FIG. 5 is a schematic view of an end structure of the battery pack of FIG. 1 along the y-direction;
FIG. 6 is a schematic view of the assembled battery pack of FIG. 1;
FIG. 7 is an exploded view of one embodiment of a battery cell in a battery pack;
fig. 8 is a cross-sectional view of a battery cell employing a wound electrode assembly taken along the xz plane of fig. 8;
fig. 9 is a sectional view of a battery cell employing a laminated electrode assembly taken along the xz plane of fig. 8.
Description of the reference numerals
1. A case assembly; 11. a box body; 111. flanging; 112. a first mounting hole; 12. a fixed beam; 121. a second mounting hole; 13. an accommodating cavity;
2. a battery cell; 20A, a first group of battery cells; 20B, a second group of battery cells;
21. a housing; 22. an electrode assembly; 221. a first pole piece; 222. a second pole piece; 223. a diaphragm; 224. flat surface; 23. a patch; 24. a cover plate assembly; 241. a cover plate; 242. a first electrode terminal; 243. a second electrode terminal;
3. a constraining member; 31. a limiting part; 32. a first mounting portion; 321. a third mounting hole; 33. a second mounting portion; 331. a fourth mounting hole;
4. a seal member; 5. a fastener; 6. and (7) pressing strips.
Detailed Description
The present invention will be described in detail below. In the following paragraphs, different aspects of the embodiments are defined in more detail. Aspects so defined may be combined with any other aspect or aspects unless clearly indicated to the contrary. In particular, any feature considered to be preferred or advantageous may be combined with one or more other features considered to be preferred or advantageous.
The terms "first", "second", and the like in the present invention are used for convenience of description only to distinguish different constituent elements having the same name, and do not indicate a sequential or primary-secondary relationship.
In addition, when an element is referred to as being "on" another element, it can be directly on the other element or be indirectly on the other element with one or more intervening elements interposed therebetween. In addition, when an element is referred to as being "connected to" another element, it may be directly connected to the other element or may be indirectly connected to the other element with one or more intervening elements interposed therebetween. Hereinafter, like reference numerals denote like elements.
The term "plurality" as used herein means two or more (including two), and similarly, "plural" means two or more (including two) groups, and "plural" means two or more (including two) groups.
In order to clearly describe the respective orientations in the following embodiments, the coordinate system in fig. 1 defines the respective directions of the battery pack, for example, and the x direction represents the length direction of the battery pack; the y direction represents the width direction of the battery pack; the z direction is perpendicular to a plane formed by the x and y directions, and represents a height direction of the battery pack, which is parallel to a vertical direction when the battery pack is mounted on a vehicle, and the vertical direction mentioned here allows a certain angular deviation from a theoretical vertical direction. Based on this orientation definition, "up", "down", "top" and "bottom" are used, all with respect to the height direction.
In some embodiments, the present disclosure provides a vehicle including a vehicle body and a battery pack disposed in the vehicle body. The vehicle is a new energy vehicle, the vehicle can be a pure electric vehicle, a hybrid electric vehicle or a range extending vehicle, a driving motor is arranged in the vehicle body and electrically connected with a battery pack, the battery pack provides electric energy, and the driving motor is connected with wheels on the vehicle body through a transmission mechanism so as to drive the vehicle to move. Preferably, the battery pack may be horizontally disposed at the bottom of the vehicle body, and may be mounted in a top-hung and/or bottom-supported manner.
Fig. 1 to 9 are schematic structural views of an embodiment of the battery pack of the present invention. The battery pack 100 includes: the battery pack comprises a case assembly 1, a battery cell 2 and a restricting part 3.
The case assembly 1 includes a case 11 and a fixing beam 12, wherein the case 11 has an open end, and the fixing beam 12 is fixed in the case 11, for example, on an inner bottom surface or a side wall of the case 11. The battery monomer 2 is arranged in the box body 11, the restraint component 3 covers the battery monomer 2 and closes the opening end of the box body 11, a preset gap is contacted or reserved between the restraint component 3 and the topmost battery monomer 2, and the restraint component 3 is fixed with the fixing beam 12 and configured to limit the battery monomer 2 from expanding. The sealing means that the restricting component 3 is hermetically connected with the box body 11, so that external liquid and water vapor can be prevented from entering the battery pack, and the safety performance of the battery pack is improved.
Preferably, the constraint component 3 is fixed with the box body 11 and the fixing beam 12, which not only can provide reliable constraint force for the battery monomer 2, but also is beneficial to being connected with the box body 11 in a sealing way, so that liquid and water vapor can be prevented from entering the battery pack, and the safety performance of the battery pack is improved.
The utility model discloses a this embodiment is fixed through setting up restraint part 3 and with fixed beam 12, when battery monomer 2 takes place the inflation, can provide stable effectual packing force to battery monomer 2, reduces battery monomer 2's the dilational strain degree to improve the leakproofness of battery package. In addition, the restraint component 3 can also close the opening end of the box body 11, so that an outer cover is omitted, the structure of the battery pack can be simplified, the thickness of the battery pack is reduced, and the weight of the battery pack is reduced; under the condition that the thickness of the battery pack is constant, a space can be reserved for increasing the energy density of the battery pack.
When the battery pack is used for a vehicle, the battery pack can be still smoothly disassembled and assembled at the original installation position after long-term use, the maintenance difficulty of the battery pack can be reduced, and external force can be prevented from being applied to an installation structural part on the vehicle due to deformation of the battery pack.
As shown in fig. 2, the fixing beam 12 divides the space in the box 11 into a plurality of accommodating cavities 13, the battery pack may include a plurality of battery cells 2, each battery cell 2 is divided into a plurality of groups in a plane perpendicular to the height direction, and each group of battery cells 2 has at least two battery cells 2 and is respectively disposed in different accommodating cavities 13. Preferably, the size of each accommodating cavity 13 is matched with the overall external size of the corresponding battery unit 2.
This embodiment arranges the respective battery cells 2 in groups and fixes them by the restriction member 3 to the respective fixing beams 12 for grouping the battery cells 2, which corresponds to increasing the fixing points between the restriction member 3 and the case 11, thereby reducing the span between the respective fixing points and improving the deformation resistance of the restriction member 3. Compared with the traditional scheme of restraining all the battery monomers integrally through the cover body, the embodiment independently exerts fixed restraint on the periphery of each group of battery monomers 2, when the battery monomers expand, the restraining parts 3 are not easy to deform, stable pressing force can be further provided for the battery monomers 2, the size of the battery pack in the height direction is prevented from being increased, and the service life of the battery pack can be prolonged.
Moreover, each battery monomer 2 is arranged in groups, when a part of the battery monomers 2 generate large heat to generate thermal runaway in working, the diffusion of the heat to the battery monomers 2 of other groups can be delayed, the working safety of the battery pack is improved, and even if the part of the battery monomers 2 cannot be normally used, the power of the battery pack can be reduced for use.
As shown in fig. 1, the battery pack includes a plurality of fixing beams 12, and the fixing beams 12 are provided on both sides of each group of battery cells 2 in the grouping direction. Each fixing beam 12 may be provided on the side of the outermost battery cell 2 close to the inner wall of the case 11, in addition to the channel formed by the adjacent battery cells 2. The fixed beam 12 may be designed as a continuous structure in the extending direction of the fixed beam, or as a segmented structure.
This structure all can fix in the both sides along grouping direction to each group battery monomer 2 to exert more stable constraining force to battery monomer 2, thereby improve the restraint effect to this group battery monomer 2, can further restrict battery monomer and take place the inflation, improve the life of battery package.
For example, in fig. 1, the respective battery cells 2 are stacked in the height direction by one or more layers, for example, in fig. 1 by two layers. Each single battery 2 is divided into a plurality of rows, and each row of single batteries 2 needs to be connected in parallel or in series through a bus bar, so that a gap is formed between two adjacent rows of single batteries 2.
Preferably, the distance between the adjacent fixing beams 12 is configured to accommodate at most two rows of the battery cells 2. Thus, the span between adjacent fixing beams 12 can be reduced as much as possible, the restricting member 3 and the fixing beams 12 have more fixing points, the deformation resistance of the restricting member 3 can be improved, and the reliability of restriction on each group of battery cells 2 can be improved.
As shown in fig. 4, the respective battery cells 2 are divided into two groups in the width direction (y direction) of the battery pack. Three fixing beams 12 extending along the length direction of the battery pack are arranged in the box body 11 and can be fixed on the inner bottom surface of the box body 11, the middle fixing beam 12 is positioned between the two groups of battery monomers 2, the fixing beams 12 on the two sides are arranged close to the inner side wall of the box body 11, the space in the box body 11 is divided into two accommodating cavities 13, one accommodating cavity 13 (positioned on the left side in the figure 2) is used for accommodating a first group of battery monomers 20A, and the first group of battery monomers 20A comprises a row of battery monomers 2; another accommodating cavity 13 (located on the right side in fig. 2) is used for accommodating a second group of battery cells 20B, and the second group of battery cells 20B includes two rows of battery cells 2 arranged side by side at intervals along the width direction. Wherein, every row of battery monomer 2 includes a plurality of battery monomer 2 that set up side by side in proper order along length direction, and two adjacent battery monomer 2's side contact, moreover, each battery monomer 2 sets up two-layerly at the direction of height stack.
The extending direction of each fixing beam 12 is perpendicular to the grouping direction of each battery cell 2, so that the internal structure of the battery pack is more compact. As shown in fig. 1, the plurality of battery cells 2 are grouped in the width direction of the battery pack, and the fixing beams 12 extend in the length direction of the battery pack, which can reduce the number of groups of the respective battery cells 2 and the number of the fixing beams 12, thereby simplifying the structure.
Alternatively, the plurality of battery cells 2 are grouped in the lengthwise direction of the battery pack, and the fixing beam 12 extends in the widthwise direction of the battery pack. The arrangement mode is beneficial to dividing each battery monomer 2 into more groups so as to increase the fixed points of the constraint component 3 and the box body 11, and can reduce the overall length-width ratio of each group of battery monomers 2, so that the constraint rigidity of each group of battery monomers 2 in the length and width directions by the constraint component 3 is balanced, and the constraint reliability is improved.
Alternatively, a plurality of battery cells 2 may be grouped in the length direction and the width direction of the battery pack at the same time, and the respective fixing beams 12 form a grid-like structure.
As for the specific structure of the fixed beam 12, a solid fixed beam or a hollow fixed beam may be used, the cross section of which may be rectangular, trapezoidal, C-shaped, or the like, and the upper surface of which may be set to be a flat surface, so as to fix the restricting member to the upper surface of the fixed beam 12, and optionally, the restricting member 3 may also be fixed to the side surface of the fixed beam 12.
As shown in the exploded schematic view of fig. 7, each battery cell 2 includes: a case 21 and an electrode assembly 22 disposed in the case 21, the case 21 may have a hexahedral shape or other shapes, and have an opening. Electrode assembly 22 is housed in case 21. The opening of the housing 21 is covered with a cover plate assembly 24. The cap plate assembly 24 includes a cap plate 241 and two electrode terminals, a first electrode terminal 242 and a second electrode terminal 243, disposed on the cap plate. The first electrode terminal 242 may be a positive electrode terminal, and the second electrode terminal 243 may be a negative electrode terminal. In other embodiments, the first electrode terminal 242 may also be a negative electrode terminal, and the second electrode terminal 243 may be a positive electrode terminal. An adaptor sheet 23 is provided between the cap plate assembly 24 and the electrode assembly 22, and the tabs of the electrode assembly 22 are electrically connected to the electrode terminals on the cap plate 241 through the adaptor sheet 23. In this embodiment, there are two adaptor pieces 23, namely, a positive adaptor piece and a negative adaptor piece.
As shown in fig. 7, two electrode assemblies 22 are provided in the case 21, and the two electrode assemblies 22 are stacked in the height direction (z direction) of the battery cell 2, wherein the height direction of the battery cell 2 coincides with the height direction of the battery pack. Of course, in other embodiments, one electrode assembly 22 may be provided in case 21, or three or more electrode assemblies 22 may be provided in case 21. A plurality of electrode assemblies 22 are stacked in the height direction (z direction) of the battery cell 2.
As shown in fig. 8 and 9, the electrode assembly 22 includes a first pole piece 221, a second pole piece 222, and a separator 223 disposed between the first pole piece 221 and the second pole piece 222. The first pole piece 221 may be a positive pole piece, and the second pole piece 222 is a negative pole piece. In other embodiments, the first pole piece 221 can also be a negative pole piece, and the second pole piece 222 can be a positive pole piece. Wherein the membrane 223 is an insulator between the first pole piece 221 and the second pole piece 222. The active material of the positive electrode tab may be coated on the coating region of the positive electrode tab, and the active material of the negative electrode tab may be coated on the coating region of the negative electrode tab. The part extending from the coating area of the positive plate is used as a positive pole tab; the part extending from the coating area of the negative plate is used as a negative pole tab. The positive tab is connected to a positive terminal on the cover plate assembly 24 by a positive adapter sheet, and similarly, the negative tab is connected to a negative terminal on the cover plate assembly 24 by a negative adapter sheet.
As shown in fig. 8, the electrode assembly 22 is of a wound structure. The first pole piece 221, the diaphragm 223 and the second pole piece 222 are all in a belt-shaped structure, the first pole piece 221, the diaphragm 223 and the second pole piece 222 are sequentially stacked and wound for more than two turns to form the electrode assembly 22, and the electrode assembly 22 is flat. When electrode assembly 22 is manufactured, electrode assembly 22 may be directly wound flat, or may be wound into a hollow cylindrical structure, and then flattened into a flat shape after winding. Fig. 8 is a schematic outline of the electrode assembly 22, and the outer surface of the electrode assembly 22 includes two flat surfaces 224, and the two flat surfaces 224 are oppositely arranged in the height direction (z direction) of the battery cell 2. The electrode assembly 22 is substantially of a hexahedral structure, and the flat surface 224 is substantially parallel to the winding axis and is the outer surface having the largest area. The flat surface 224 may be a relatively flat surface and is not required to be a pure plane.
As shown in fig. 9, the electrode assembly 22 has a laminated structure, i.e., the electrode assembly 22 includes a plurality of first pole pieces 221 and a plurality of second pole pieces 222 therein, and a separator 223 is disposed between the first pole pieces 221 and the second pole pieces 222. The first pole piece 221 and the second pole piece 222 are stacked along the height direction (z direction) of the battery cell 2.
In some embodiments, as shown in fig. 1 and 3, the battery pack may include a constraining member 3 integrally covering each of the battery cells 2, the constraining member 3 including: the plurality of limiting parts 31 respectively cover the battery single bodies 2 of different groups, and gaps can be contacted or reserved between the limiting parts 31 and the battery single bodies 2 at the topmost layer; and first mounting portions 32 connected to side portions of the respective stopper portions 31 in the grouping direction of the battery cells 2, the first mounting portions 32 being fixed to the fixing beams 12 at corresponding positions. The restricting member 3 may be formed by bending a flat plate.
Specifically, first installation department 32 is equipped with a plurality ofly, and each spacing portion 31 all is equipped with first installation department 32 along the both sides of battery monomer 2 grouping direction, and this kind of structure can increase the fixed point of restraint part 3 and box 11 to for battery monomer 2 provides more reliable and more stable restraint power, restriction battery monomer 2 takes place to expand.
Alternatively, since the restricting member 3 may be fixed to the case 11, the fixing beams 12 may be provided only between the battery cells 2 of adjacent groups, and the fixing beams 12 located at the outermost sides of the respective battery cells 2 may be eliminated, so that the first mounting portion 32 is provided only on one side of the stopper portion 31 for the battery cells 2 of the outermost group, which is not shown in the drawings. This structure can simplify the structure of the restricting member 3, and reduce the space occupied by the fixing beam 12 in the case 11, thereby reducing the volume of the battery pack or increasing the energy density of the battery pack to leave a space.
This embodiment is designed to reduce the number of parts and to facilitate the mounting by designing the restricting member 3 as a unitary structure. Moreover, only one fixing beam 12 needs to be arranged between the adjacent battery unit groups 2, and the first mounting parts 32 can be shared between the adjacent limiting parts 31, so that the structure can be simplified, and the fixing is convenient.
In other embodiments, not shown in the figures, the battery pack may include a plurality of constraining members 3, each constraining member 3 covering a different group of battery cells 2, each constraining member 3 including: a stopper 31 covering the corresponding group of the battery cells 2; and a first mounting portion 32 connected to a side portion of the stopper portion 31 in the grouping direction of the battery cells 2, the first mounting portion 32 being fixed to the fixing beam 12 at a corresponding position.
Specifically, the first mounting portions 32 are provided in plurality and connected to both sides of each of the limiting portions 31 in the grouping direction of the battery cells 2; alternatively, the fixing beam 12 may be provided only between the battery cells 2 of adjacent groups, and the first mounting portion 32 may be provided only on one side of the stopper portion 31 with respect to the battery cell 2 of the outermost group.
In the embodiment, the plurality of restraining parts 3 are adopted to respectively restrain the battery monomers 2 in different groups, so that the fixing restraint can be independently applied to each group of battery monomers 2, the covering surface of the restraining parts 3 is reduced, the rigidity of the restraining parts is improved, the deformation is not easy to occur, and the stable and reliable restraining force is provided. Moreover, if the expansion amount of the specific battery unit 2 is large, only the corresponding constraint component 3 is deformed, and the deformation stress is not transmitted to other constraint components 3, so that the influence on other battery unit 2 can be avoided, and the working reliability and the service life of the battery pack can be improved. In addition, the disassembly and assembly of the constraint parts 3 are not affected, the installation of the constraint parts 3 is not affected when the heights of the battery units 2 are different, and when a specific battery unit 2 breaks down and needs to be uncovered for maintenance and replacement, only the corresponding constraint part 3 needs to be opened without disassembling other constraint parts 3.
For the constraining member 3 in the above embodiment, the top surface of the corresponding battery cell 2 is covered by the limiting part 31, which not only increases the constraining force on the battery cell 2 and improves the deformation resistance of the constraining member, but also improves the sealing performance of the battery pack and prevents external impurities from entering the battery pack.
On this basis, as shown in fig. 3, the restricting member 3 further includes a second mounting portion 33, and the second mounting portion 33 is connected to a side edge of the outermost first mounting portion 32 away from the limiting portion 31 and fixed to the case 11, for example, by using a fastening member 5 or an adhesive fixing method, for performing a sealing connection with the case 11.
The fixing structure can provide reliable constraint force for the battery monomer 2, is favorable for sealing connection with the box body 11, can prevent external liquid and water vapor from entering the battery pack, and improves the safety performance of the battery pack.
Further, the stopper portion 31 protrudes as a whole in a direction away from the battery cell 2 with respect to the first mounting portion 32. This kind of structure not only can reduce the height that sets up of fixed beam 12, guarantees the intensity of fixed beam 12, when adopting fastener 5 to fix first installation department 32 and fixed beam 12 moreover, can avoid fastener 5 to bulge spacing portion 31 top surface, can reduce the height of battery package.
Further, the constraining member 3 may further include a second mounting portion 33, the top surface of the fixing beam 12 is higher than the top surface of the case 11, which is beneficial for the stacking arrangement of the battery cells 2, the battery cell 2 at the topmost layer is higher than the top surface of the fixing beam 12, and the bottom surface of the first mounting portion 32 is higher than the bottom surface of the second mounting portion 33.
For the outermost group of the battery cells 2, the stopper portion 31, the first mounting portion 32, and the second mounting portion 33 sequentially form a stepped structure having a gradually decreasing height. This structure increases the strength of the restricting member 3, and also increases the accommodating space of the battery cell 2 while reducing the height of the case 11.
Alternatively, in the embodiment in which the first mounting portion 32 is provided only on one side of the stopper portion 31, the second mounting portion 33 is directly connected to the outer side edge of the outermost stopper portion 31 and fixed to the case 11, for the battery cell 2 positioned in the outermost group.
As shown in fig. 1, the battery pack of the present invention may further include: and the pressing strip 6 is arranged between the first mounting part 32 and the fixed beam 12, the pressing strip 6 can be in a strip-shaped sheet structure, and a hole is formed in the pressing strip 6 to ensure that the fastener 5 penetrates through the hole. The pressing strips 6 with proper thickness can be selected during assembly to adjust the assembly gap, after the constraint component 3 and the fixed beam 12 are fixed by the fasteners 5, the constraint component 3 and the battery monomer 2 can keep a proper assembly gap, the constraint component 3 is prevented from generating larger pressing force on the battery monomer 2, and the service life of the battery pack is prolonged.
Alternatively, the bead 6 may be provided between the fastener 5 and the top surface of the first mounting portion 32, for example, when the fastener 5 is a screw, the bead 6 is provided between the screw head and the top surface of the first mounting portion 32, so as to increase the reliability of the fixation of the fastener 5.
Still referring to fig. 1, in order to ensure the tightness of the internal space of the battery pack and prevent external liquid or vapor from entering the battery pack to affect the working performance of the battery cells 2, the battery pack of the present invention may further include a sealing member 4 disposed between the constraining member 3 and the case 11. Specifically, the seal member 4 may have a long strip-shaped sheet structure or a rectangular ring structure, and is disposed between the second mounting portion 33 and the case 11. The sealing element 4 is provided with a hole to ensure that the fastening element 5 passes through. The sealing member 4 may be made of silicone rubber or the like. The seal may also absorb vibrations transmitted to the battery pack during operation of the vehicle when the battery pack is used in a vehicle.
Furthermore, in order to improve the fixing reliability of the single batteries 2 and prevent the single batteries 2 from shaking, an adhesive layer is arranged between the single battery 2 at the bottommost layer and the inner bottom surface of the box body 11; and/or an adhesive layer is arranged between two adjacent single batteries 2 in each group of single batteries 2; and/or an adhesive layer is provided between the restricting member 3 and the topmost battery cell 2. For a battery pack with only a single layer of battery cells 2, the battery cells 2 at the bottommost layer and the topmost layer are the same layer of battery cells 2.
Specifically, as shown in fig. 1, a plurality of second mounting holes 121 are formed at intervals along the extending direction of the top of the fixed beam 12, a plurality of third mounting holes 321 are formed at intervals along the extending direction of the fixed beam 12 on the first mounting portion 32, and the first mounting portion 32 is fixed to the fixed beam 12 by the fasteners 5 penetrating through the third mounting holes 321 and the second mounting holes 121. A plurality of fourth mounting holes 331 are formed in the second mounting portion 33 at intervals along the extending direction of the fixed beam 12, a flange 111 is arranged around the opening end of the box body 11, first mounting holes 112 are formed in the flange 111 at intervals, and the second mounting portion 33 is fixed to the flange 111 by penetrating the fourth mounting holes 331 and the first mounting holes 112 through fasteners 5.
Fig. 5 is a structural view of an end portion of the battery pack 100 in the y direction after assembly, and fig. 6 is a structural view of the battery pack 100 after assembly.
On the basis, the temperature can be adjusted according to the working requirement of the battery pack, the box body assembly 1 can further comprise a temperature control part, the temperature control part is arranged at the bottom area of the box body 11 and is used for adjusting the temperature of the battery monomer 2 from the bottom, and for example, the battery monomer 2 can be cooled in order to take away heat generated in the working process of the battery monomer 2; or when the battery pack is used in a low-temperature area, the battery cells can be heated.
The utility model discloses an each this embodiment is through setting up fixed beam 12 and restraint part 3, each group battery monomer 2's lateral part and top have been wrapped, the temperature control part carries out temperature regulation in the box 11 bottom, the temperature can transmit to fixed beam 12 and restraint part 3 in proper order, the conduction path of temperature control part regulation and control battery monomer 2 temperature has been changed, along the temperature distribution of direction of height in can balancing holding chamber 13, regional battery monomer 2's difference in temperature about having reduced, make each battery monomer 2's temperature uniformity degree improve, thereby make the uniformity of depth of discharge improve.
It is right above that the utility model provides a battery package and vehicle have carried out detailed introduction. The principles and embodiments of the present invention have been explained herein using specific examples, which are presented only to aid in understanding the methods and their core concepts. It should be noted that, for those skilled in the art, without departing from the principle of the present invention, the present invention can be further modified and modified, and such modifications and modifications also fall within the protection scope of the appended claims.
Claims (15)
1. A battery pack, comprising:
the box body assembly (1) comprises a box body (11) and a fixed beam (12), wherein the fixed beam (12) is fixed in the box body (11);
the battery monomer (2) is arranged in the box body (11); and
and the constraint component (3) covers the battery cells (2) and closes the open end of the box body (11), and the constraint component (3) is fixed with the fixing beam (12).
2. The battery pack according to claim 1, wherein the fixing beam (12) divides the case (11) into a plurality of accommodating cavities (13), the battery pack includes a plurality of the battery cells (2), and each of the battery cells (2) is divided into a plurality of groups in a plane perpendicular to a height direction, each group of the battery cells (2) has at least two of the battery cells (2) and is respectively disposed in the different accommodating cavities (13).
3. The battery pack according to claim 2, characterized in that the battery pack includes a plurality of the fixing beams (12), and the fixing beams (12) are provided on both sides of each group of the battery cells (2) in the grouping direction.
4. The battery pack according to claim 2,
the battery units (2) are grouped along the length direction of the battery pack, and the fixing beams (12) extend along the width direction of the battery pack; and/or
The battery cells (2) are grouped in the width direction of the battery pack, and the fixing beam (12) extends in the length direction of the battery pack.
5. A battery pack, as claimed in claim 2, characterized by comprising one of said constraining members (3), said constraining member (3) comprising:
a plurality of stopper portions (31) that cover the battery cells (2) of different groups, respectively; and
the first installation part (32) is connected to the side part of the limiting part (31) in the grouping direction of the battery cells (2), and the first installation part (32) is fixed to the fixing beam (12) in the corresponding position.
6. The battery pack according to claim 5, wherein one fixing beam (12) is provided between two adjacent sets of the battery cells (2), and one first mounting portion (32) is provided between two adjacent limiting portions (31).
7. A battery pack according to claim 2, comprising a plurality of said constraining members (3), each of said constraining members (3) covering a different group of battery cells (2), said constraining members (3) comprising:
a stopper portion (31) covering the battery cells (2) of the corresponding group; and
the first installation part (32) is connected to the side part of the limiting part (31) in the grouping direction of the battery cells (2), and the first installation part (32) is fixed to the fixing beam (12) in the corresponding position.
8. The battery pack according to any one of claims 5 to 7, wherein the restriction member (3) further includes a second mounting portion (33),
the second mounting part (33) is connected to the side edge, away from the limiting part (31), of the first mounting part (32) on the outermost side and is fixed with the box body (11); and/or
The second mounting part (33) is connected to the outer side edge of the outermost limiting part (31) and fixed with the box body (11).
9. The battery pack according to claim 8,
the limiting portion (31) integrally protrudes relative to the first mounting portion (32) in a direction away from the single battery (2).
10. The battery pack according to claim 8, wherein the top surface of the fixing beam (12) is higher than the top surface of the case (11), and the bottom surface of the first mounting portion (32) is higher than the bottom surface of the second mounting portion (33).
11. The battery pack according to claim 5 or 7, further comprising:
layering (6) and fastener (5), first installation department (32) are established layering (6) with between fixed beam (12), fastener (5) pass layering (6) with first installation department (32) and with fixed beam (12) are fixed, in order to incite somebody to action first installation department (32) are fixed on fixed beam (12).
12. The battery pack according to claim 1, further comprising a sealing member (7), the sealing member (7) being provided between the constraining member (3) and the case (11) to close an open end of the case (11).
13. The battery pack according to any one of claims 2 to 4, wherein an adhesive layer is arranged between the battery cell (2) at the bottommost layer and the inner bottom surface of the box body (11); and/or the presence of a gas in the gas,
an adhesive layer is arranged between every two adjacent battery single cells (2) in each group of battery single cells (2); and/or the presence of a gas in the gas,
an adhesive layer is arranged between the constraint component (3) and the battery monomer (2) at the topmost layer.
14. The battery pack according to any one of claims 1 to 4, wherein the battery cell (2) comprises:
a housing (21); and
an electrode assembly (22) disposed within the case (21), the electrode assembly (22) including a first pole piece (221), a second pole piece (222), and a separator (223) disposed between the first pole piece (221) and the second pole piece (222);
the electrode assembly (22) is of a winding structure and is flat, the outer surface of the electrode assembly (22) comprises two flat surfaces (224), and the two flat surfaces (224) are oppositely arranged along the height direction; alternatively, the first and second electrodes may be,
the electrode assembly (22) has a laminated structure in which the first pole piece (221) and the second pole piece (222) are stacked in the height direction.
15. A vehicle, characterized by comprising:
a vehicle main body; and
the battery pack according to any one of claims 1 to 14, wherein the battery pack is provided in the vehicle body.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920979160.3U CN209963117U (en) | 2019-06-27 | 2019-06-27 | Battery pack and vehicle |
| PCT/CN2020/091276 WO2020259139A1 (en) | 2019-06-27 | 2020-05-20 | Battery pack, battery pack fabrication method, and vehicle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920979160.3U CN209963117U (en) | 2019-06-27 | 2019-06-27 | Battery pack and vehicle |
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| Publication Number | Publication Date |
|---|---|
| CN209963117U true CN209963117U (en) | 2020-01-17 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920979160.3U Active CN209963117U (en) | 2019-06-27 | 2019-06-27 | Battery pack and vehicle |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN209963117U (en) |
| WO (1) | WO2020259139A1 (en) |
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| CN112151709A (en) * | 2019-06-27 | 2020-12-29 | 宁德时代新能源科技股份有限公司 | Battery pack and vehicle |
| WO2020259434A1 (en) * | 2019-06-27 | 2020-12-30 | 宁德时代新能源科技股份有限公司 | Battery pack and vehicle |
| WO2020259139A1 (en) * | 2019-06-27 | 2020-12-30 | 宁德时代新能源科技股份有限公司 | Battery pack, battery pack fabrication method, and vehicle |
| WO2021196796A1 (en) * | 2020-04-03 | 2021-10-07 | 宁德时代新能源科技股份有限公司 | Battery module, battery pack, and apparatus using secondary battery |
| US11239525B2 (en) | 2019-08-02 | 2022-02-01 | Contemporary Amperex Technology Co., Limited | Battery pack |
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| CN209963117U (en) * | 2019-06-27 | 2020-01-17 | 宁德时代新能源科技股份有限公司 | Battery pack and vehicle |
| CN111106279B (en) * | 2019-08-02 | 2022-11-08 | 宁德时代新能源科技股份有限公司 | Battery pack |
| CN209963118U (en) * | 2019-06-27 | 2020-01-17 | 宁德时代新能源科技股份有限公司 | Battery pack and vehicle |
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2019
- 2019-06-27 CN CN201920979160.3U patent/CN209963117U/en active Active
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2020
- 2020-05-20 WO PCT/CN2020/091276 patent/WO2020259139A1/en active Application Filing
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| WO2020259139A1 (en) * | 2019-06-27 | 2020-12-30 | 宁德时代新能源科技股份有限公司 | Battery pack, battery pack fabrication method, and vehicle |
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