CN213366662U - Power battery and electric automobile - Google Patents
Power battery and electric automobile Download PDFInfo
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- CN213366662U CN213366662U CN202021884028.3U CN202021884028U CN213366662U CN 213366662 U CN213366662 U CN 213366662U CN 202021884028 U CN202021884028 U CN 202021884028U CN 213366662 U CN213366662 U CN 213366662U
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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
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- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
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- Y02E60/10—Energy storage using batteries
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Abstract
The utility model relates to a battery field provides a power battery and electric automobile. The power battery comprises a heat dissipation structure, an electric core assembly, a first end adapter, a second end adapter and an end support. The heat dissipation structures are arranged in a plurality along a first direction, and each heat dissipation structure extends along a second direction; an electric core assembly is arranged between two adjacent heat dissipation structures, and two opposite side surfaces of the electric core assembly are abutted to the heat dissipation structures; the first end adapter piece is arranged at one end of the electric core assembly and is used for connecting two adjacent electric core assemblies; the second end adapter piece is arranged at the other end of the electric core assembly and is used for connecting two adjacent electric core assemblies; the end part support is used for supporting the first end adapter piece or the second end adapter piece, and each end part support is correspondingly connected with a plurality of heat dissipation structures which are continuously arranged. Based on the structure, the overall layout of the power battery is relatively compact, and the heat dissipation performance, the space utilization rate, the volume grouping rate and the energy density of the power battery are improved.
Description
Technical Field
The utility model belongs to the technical field of the battery, especially, relate to a power battery and electric automobile.
Background
Among the power battery, a plurality of electric core subassemblies of battery module are usually through locating the module bottom plate and the contact of liquid cooling board of its bottom to realize the heat dissipation. Therefore, the heat dissipation effect of the two sides of the electric core assembly with larger area to be dissipated is poor. In addition, power connection is required to be established between the cell components, so that how to improve the heat dissipation performance of the power battery and avoid the great reduction of the space utilization rate and the energy density of the power battery, which becomes a problem to be solved urgently in the industry.
SUMMERY OF THE UTILITY MODEL
An object of the embodiment of the utility model is to provide a power battery to solve how when improving power battery's heat dispersion, avoid power battery's space utilization and the technical problem that energy density reduces by a wide margin.
In order to achieve the above object, the utility model adopts the following technical scheme: a power cell, comprising:
the heat dissipation structures are arranged at intervals along a first direction, each heat dissipation structure extends along a second direction, and the first direction and the second direction form a preset angle;
the electric core assembly is arranged between the two adjacent heat dissipation structures, and two opposite side surfaces of the electric core assembly are abutted to the heat dissipation structures;
the first end adapter is arranged at one end of the electric core assembly and is used for connecting two adjacent electric core assemblies;
the second end adapter is arranged at the other end of the electric core assembly and is used for connecting two adjacent electric core assemblies;
the end part supports are provided with a plurality of end parts and used for supporting the first end adapter piece or the second end adapter piece, and each end part support is correspondingly connected with a plurality of heat dissipation structures which are continuously arranged.
By adopting the scheme, on one hand, heat of the two opposite side surfaces of the electric core assembly can be radiated and conducted through the heat radiation structures, so that the heat radiation effect of the two opposite side surfaces of the electric core assembly with larger area to be radiated can be effectively optimized, and the temperature difference of the two opposite ends of the electric core assembly is reduced to a certain extent, so that the heat radiation performance of the power battery is improved; on one hand, a stable and reliable power connection relationship can be established between two adjacent cell assemblies through the first end adapter or the second end adapter supported and fixed by the end bracket, so that the cell assemblies can be stably and reliably connected in series or in parallel; on the one hand, still correspond through a plurality of heat radiation structure with the tip support and set up in succession and be connected, have left out the curb plate to make the overall arrangement compactness of each heat radiation structure, each electric core subassembly, each tip support, each first end adaptor and each second end adaptor, promptly, make power battery's whole overall arrangement compactification, thereby can effectively ensure and improve power battery's space utilization, volume percentage of uniting, do benefit to the guarantee and improve power battery's energy density.
In one embodiment, an end bracket is connected with a plurality of heat dissipation structures which are arranged in series, and the plurality of heat dissipation structures are respectively matched with the end bracket in an inserting way.
By adopting the scheme, on the basis of ensuring that each heat dissipation structure, each electric core assembly, each end support, each first end adapter and each second end adapter are relatively fixed and compact in layout, the plurality of heat dissipation structures are respectively in plug-in fit with the end supports, so that the disassembly and assembly convenience of the plurality of heat dissipation structures and the end supports are further improved.
In one embodiment, the end bracket is provided with at least one alignment protrusion protruding from each of two sides thereof, and among the plurality of heat dissipation structures, two heat dissipation structures located on two sides are provided with alignment grooves for mating with the alignment protrusions, and one end of each alignment groove is connected to the outside in the extending direction thereof.
By adopting the scheme, when the end support is in splicing fit with the two heat dissipation structures positioned at two sides in the plurality of heat dissipation structures, the alignment bulge of the end support slides into and is inserted into the alignment groove from one end communicated to the outside of the alignment groove, so that the relative positions of the end support and the heat dissipation structures positioned at two sides in the plurality of heat dissipation structures can be fixed through the alignment fit relation between the alignment bulge and the alignment groove, the position and the state of the end support and the first end adapter or the second end adapter supported and fixed by the end support relative to the heat dissipation structures can be stabilized, particularly, the movement of the end support and the first end adapter or the second end adapter supported and fixed by the end support relative to the heat dissipation structures along the second direction can be limited, and the stability and the reliability of the power connection relation established by the two adjacent electric core assemblies through the first end adapter or the second end adapter can be further improved, and the overall layout of the power battery can be further compacted, so that the space utilization rate and the volume grouping rate of the power battery are further improved, and the energy density of the power battery is further improved.
In one embodiment, the alignment protrusions on both sides of the end bracket are spaced apart in the second direction.
Through adopting above-mentioned scheme, can be convenient for same heat radiation structure sets up a plurality of counterpoint grooves in second direction interval to in through each counterpoint groove respectively with the protruding counterpoint cooperation of the both ends support of its both sides, based on this, do benefit to further compactification, regularization power battery's overall arrangement, especially do benefit to the whole length of reduction power battery in the second direction, thereby do benefit to the space utilization who further improves power battery, volume percentage of uniting, do benefit to the energy density that further improves power battery.
In one embodiment, the end bracket has a slot on a side facing the heat dissipation structure, and the end of the heat dissipation structure located in the middle of the plurality of heat dissipation structures is inserted into the slot.
By adopting the scheme, the end part of the heat dissipation structure positioned in the middle of the plurality of heat dissipation structures can be further in inserted fit with the insertion groove, on the basis, on one hand, the alignment precision of the end part support relative to the heat dissipation structure can be correspondingly improved on the basis of the inserted fit relation, and the position and the state of the end part support relative to the heat dissipation structure can be further stabilized, so that the stability and the reliability of the power connection relation established by the first end adapter piece or the second end adapter piece at the end side of the two adjacent electric core assemblies can be further improved; on the other hand, the heat radiation structure in the middle of being located among the multiple heat radiation structure of accessible inserting groove holding to the whole length in the second direction of corresponding compression power battery, thereby can further compactify power battery's overall arrangement, thereby do benefit to the space utilization who further improves power battery, volume group rate, do benefit to the energy density that further improves power battery.
In one embodiment, the insertion groove is disposed through in the extending direction thereof.
By adopting the scheme, the middle heat dissipation structures in the plurality of heat dissipation structures can be conveniently arranged, and the insertion matching is quickly and accurately realized through the two ports of the insertion groove, which are communicated with the outside, and the insertion groove, so that the matching convenience of the middle heat dissipation structures and the end support in the plurality of heat dissipation structures can be correspondingly improved, and the assembling convenience and the assembling efficiency of the power battery can be improved to a certain extent.
In one embodiment, among the plurality of heat dissipation structures, the length of the heat dissipation structure in the middle protruding out of the electric core assembly is smaller than the length of the heat dissipation structures on the two sides protruding out of the electric core assembly.
By adopting the scheme, the heat dissipation structures are arranged in a manner that the heat dissipation structures protrude and extend from the end sides of the electric core assembly, wherein the heat dissipation structures positioned on the two sides are relatively long in length relative to the protruding and extending lengths of the end sides of the electric core assembly, so that the two heat dissipation structures can be conveniently detachably connected with the end support, the position and the state of the end support can be stabilized, and the stability and the reliability of the power connection of the two adjacent electric core assemblies on the end sides can be guaranteed; and the length that the lateral protrusion of heat radiation structure for electric core subassembly that lies in the centre extends is shorter relatively, based on this, can be on the basis of the radiating effect of the side of guarantee this heat radiation structure to electric core subassembly, and on the basis of the stable utility of the position of guarantee this heat radiation structure to the end support and state, this heat radiation structure of corresponding compression length in the second direction, thereby can further compress the whole length in the second direction of power battery, can further compactify power battery's overall arrangement, thereby do benefit to and further improve power battery's space utilization, volume percentage of unitizing, do benefit to and further improve power battery's energy density.
In one embodiment, the first end adapter or the second end adapter is arranged on one side of the end support departing from the electric core assembly, the end support is provided with through holes penetrating through the two sides of the first end adapter or the second end adapter, and the pole lugs penetrating through the holes are electrically connected with the first end adapter or the second end adapter.
Through adopting above-mentioned scheme, the utmost point ear accessible of electricity core subassembly passes through each cross-under hole and establishes power connection relation with first end adaptor or second end adaptor, based on this, can be convenient for realize earlier that tip support is connected with heat radiation structure's correspondence, with the position and the state of stabilizing tip support and first end adaptor or second end adaptor, realize again that first end adaptor or second end adaptor and the power of electricity core subassembly are connected, with the power connection relation that obtains stability and reliability better, and still can further improve power battery's assembly convenience and assembly efficiency.
In one embodiment, the power cell further comprises:
the end plates are arranged at two ends of each heat dissipation structure respectively and cover the end supports, and two ends of the end plates are abutted to the two heat dissipation structures with the largest spacing distance in the first direction respectively.
Through adopting above-mentioned scheme, the accessible is at the biggest two heat radiation structure of interval distance in the first direction, the butt encloses in the end plate of two heat radiation structure one ends and the butt in the end plate of two heat radiation structure other ends and closes and form an annular space, based on this, not only accessible end plate is to the end support, certain protection is realized in the outside of first end adaptor and second end adaptor, still further compactification, regularization power battery's overall arrangement, thereby do benefit to further improvement power battery's space utilization, volume percentage of groups, do benefit to further improvement power battery's energy density.
In one embodiment, the end plate is connected to at least one retaining structure on a side thereof facing the respective end bracket.
Through adopting above-mentioned scheme, each structure of holding is supported to the accessible supports between the body and the tip support of holding in the end plate, so that there is stable interval between the side of end plate and the side of tip support, thereby can do benefit to and form the accommodation space who holds first end adaptor or second end adaptor between the side of end plate and the side of tip support, and can reduce the end plate extrusion, the risk of damage first end adaptor or second end adaptor, thereby can further ensure and improve the end plate to the tip support, the protection effect of first end adaptor and second end adaptor, and do benefit to further compactification, regularize power battery's overall layout, thereby do benefit to further space utilization who improves power battery, volume percentage of groups, do benefit to further improvement power battery's energy density.
In one embodiment, the power cell further comprises:
the liquid cooling assembly comprises a water inlet connector, a water outlet connector and a liquid cooling plate which is integrally connected to the same side of each heat dissipation structure, the liquid cooling plate is abutted to the end face, facing the liquid cooling plate, of each electric core assembly, the liquid cooling plate is provided with a plurality of cooling flow channels which are communicated with the water inlet connector and the water outlet connector, and at least part of each cooling flow channel is aligned with the end face of each electric core assembly.
By adopting the scheme, on one hand, the electric core assemblies are directly contacted with the liquid cooling plate, and the cooling flow channel at least partially flows through the end surfaces of the electric core assemblies, so that the heat conduction path between the electric core assemblies and the liquid cooling plate is effectively shortened, the heat dissipation performance of the power battery can be further improved, the overall weight of the power battery can be effectively reduced, and the overall energy density of the power battery can be improved; on the other hand, accessible heat radiation structure conducts fast the heat that deviates from liquid cooling board one side even with electric core subassembly both sides relatively to the liquid cooling board with heat radiation structure body coupling to realize further heat dissipation, thereby can further optimize power battery's heat dispersion, and can further reduce the electric core subassembly deviate from liquid cooling board one side and to the temperature difference size between liquid cooling board one side, thereby can further improve the temperature homogeneity of electric core subassembly in the operation process, with the performance that further improves power battery.
An object of the embodiment of the utility model is also to provide an electric automobile, including power battery.
By adopting the scheme, the service performance of the electric automobile can be effectively improved and optimized by the power battery with better heat dissipation performance and service performance and higher space utilization rate, volume grouping rate and energy density.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for the embodiments or the prior art descriptions will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without inventive labor.
Fig. 1 is a schematic perspective view of a power battery provided in an embodiment of the present invention;
FIG. 2 is a partial schematic view I of the power battery provided in FIG. 1;
FIG. 3 is an exploded schematic view of the power cell provided in FIG. 2;
FIG. 4 is a second schematic diagram of a portion of the power cell shown in FIG. 1;
fig. 5 is a schematic perspective view of an end bracket according to an embodiment of the present invention;
fig. 6 is a schematic structural view of an end bracket and a first end adaptor according to an embodiment of the present invention;
fig. 7 is a schematic perspective view of a heat dissipation structure and a liquid cooling assembly according to an embodiment of the present invention;
fig. 8 is a front view of the heat dissipation structure and liquid cooling assembly provided in fig. 7.
Wherein, in the figures, the respective reference numerals:
100-a heat dissipation structure, 101-an alignment groove, 200-an electric core assembly, 300-a first end adapter, 400-a second end adapter, 500-an end support, 510-an alignment protrusion, 501-an insertion groove, 502-a through hole, 600-an end plate, 610-a butting structure, 700-a liquid cooling assembly, 710-a water inlet connector, 720-a water outlet connector, 730-a liquid cooling plate and 731-a cooling flow channel.
Detailed Description
In order to make the technical problem, technical solution and advantageous effects to be solved by the present invention more clearly understood, the following description is given in conjunction with the accompanying drawings and embodiments to illustrate the present invention in further detail. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
The following describes the specific implementation of the present invention in more detail with reference to specific embodiments:
referring to fig. 1, 2 and 4, an embodiment of the present invention provides a power battery, which includes a heat dissipation structure 100, a battery assembly 200, at least one first end adapter 300, at least one second end adapter 400 and a plurality of end brackets 500. As used herein, "plurality" refers to two or more integers.
Referring to fig. 3, a plurality of heat dissipation structures 100 are arranged at intervals along a first direction a, each heat dissipation structure 100 extends along a second direction b, the first direction a and the second direction b form a predetermined angle, and the first direction a and the second direction b are preferably perpendicular to each other; an electric core assembly 200 is arranged between two adjacent heat dissipation structures 100, and two opposite side surfaces of the electric core assembly 200 are abutted to the heat dissipation structures 100; the first end adaptor 300 is arranged at one end of the electric core assembly 200 and is used for connecting two adjacent electric core assemblies 200; the second end adaptor 400 is arranged at the other end of the electric core assembly 200 and is used for connecting two adjacent electric core assemblies 200; the plurality of electric core assemblies 200 are arranged in parallel, series or series-parallel through each first end adapter 300 and each second end adapter 400; the end bracket 500 is used for supporting the first end adapter 300 or the second end adapter 400, and each end bracket 500 is correspondingly connected with a plurality of heat dissipation structures 100 which are arranged in series.
It should be noted that, the distance between two adjacent heat dissipation structures 100 is substantially equal to the thickness (the length in the first direction a) of the electric core assembly 200, so that when the electric core assembly 200 is placed between two heat dissipation structures 100, two opposite side surfaces of the electric core assembly 200 can be both in large-area abutting and contacting with the heat dissipation structures 100, and accordingly, heat of two opposite side surfaces of the electric core assembly 200 can be dissipated and conducted through each heat dissipation structure 100, so that the heat dissipation effect of the two opposite side surfaces of the electric core assembly 200 with a larger area to be dissipated can be effectively optimized, the temperature difference between two opposite ends of the electric core assembly 200 can be effectively reduced to a certain extent, the temperature uniformity of the electric core assembly 200 in the operation process is improved, and the heat dissipation performance and the service performance of the power battery are improved.
It should also be noted here that the end sides (tabs) of two adjacent core assemblies 200 are connected to the required power by the first end adapter 300 or the second end adapter 400. Moreover, in order to ensure the stability and reliability of the power connection between two adjacent electric core assemblies 200, the present embodiment is provided with an end bracket 500 for supporting and fixing the first end adaptor 300 or the second end adaptor 400. The present embodiment also detachably connects the end bracket 500 to a plurality of heat dissipation structures 100 that are continuously disposed, so that the end bracket 500 is fixed relative to each of the electrical core assemblies 200 connected by the first end adapter 300 or the second end adapter 400 and the plurality of heat dissipation structures 100 adjacent thereto.
Based on this, on one hand, the first end adapter 300 or the second end adapter 400 supported and fixed by the end bracket 500 can be fixed relative to the plurality of heat dissipation structures 100 near the connected electric core assemblies 200, and then the first end adapter 300 or the second end adapter 400 can be fixed relative to the connected electric core assemblies 200, so that the tabs of the two adjacent electric core assemblies 200 can be welded on the first end adapter 300 or the second end adapter 400 with relatively stable position and state, the power connection of the two adjacent electric core assemblies 200 at the end side can be established quickly and stably, the risk of damage to the tabs of the electric core assemblies 200 can be effectively reduced, and the stability and reliability of the connection relationship between the first end adapter 300 or the second end adapter 400 and the tabs of the two adjacent electric core assemblies 200 can be ensured and improved, the risk of accidental interruption of the power connection of two adjacent electric core assemblies 200 is favorably reduced; on the other hand, the layout of each heat dissipation structure 100, each electric core assembly 200, each end support 500, each first end adapter 300 and each second end adapter 400 can be very compact, that is, the overall layout of the power battery can be relatively compact, so that the space utilization rate and the volume grouping rate of the power battery can be effectively ensured and improved, and the guarantee and the improvement of the energy density of the power battery are facilitated.
In summary, by adopting the above scheme, on one hand, the heat of the two opposite side surfaces of the electric core assembly 200 can be radiated and conducted through the heat radiation structures 100, so that the heat radiation effect of the two opposite side surfaces of the electric core assembly 200 with a larger area to be radiated can be effectively optimized, and the temperature difference between the two opposite ends of the electric core assembly 200 can be reduced to a certain extent, so as to improve the heat radiation performance of the power battery; on one hand, a stable and reliable power connection relationship can be established between two adjacent electric core assemblies 200 through the first end adapter 300 or the second end adapter 400 which is supported and fixed by the end bracket 500, so that the electric core assemblies 200 can be stably and reliably connected in series or in parallel; on the one hand, still through corresponding the detachable connection with a plurality of heat radiation structure 100 that set up in succession with tip support 500, the curb plate has been omitted to make each heat radiation structure 100, each electric core subassembly 200, each tip support 500, each first end adaptor 300 and each second end adaptor 400's overall arrangement compact, promptly, make the whole overall arrangement of power battery compacter, thereby can effectively ensure and improve power battery's space utilization, volume percentage of uniting, do benefit to the guarantee and improve power battery's energy density.
Referring to fig. 2, fig. 3 and fig. 4, in the present embodiment, an end bracket 500 is connected to a plurality of heat dissipation structures 100 that are continuously disposed, and the plurality of heat dissipation structures 100 are respectively inserted into and matched with the end bracket 500.
By adopting the above scheme, on the basis of ensuring that each heat dissipation structure 100, each electric core assembly 200, each end support 500, each first end adapter 300 and each second end adapter 400 are relatively fixed and compact in layout, the plurality of heat dissipation structures 100 are respectively in plug-in fit with the end support 500, so that the convenience in dismounting the plurality of heat dissipation structures 100 and the end support 500 is further improved.
Referring to fig. 2, 3 and 4, in the present embodiment, at least one alignment protrusion 510 is respectively protruded on two sides of the end portion bracket 500, in the plurality of heat dissipation structures 100, the heat dissipation structures 100 on two sides are provided with alignment grooves 101 for aligning, inserting and matching with the alignment protrusions 510, and one end of each alignment groove 101 is communicated with the outside in the extending direction thereof.
By adopting the above-mentioned scheme, when the end bracket 500 is in inserting fit with two heat dissipation structures 100 located at two sides of the plurality of heat dissipation structures 100, the aligning protrusion 510 of the end bracket 500 can be slid into and inserted into the aligning groove 101 from one end of the aligning groove 101 communicating to the outside, based on this, the relative position of the end bracket 500 and the heat dissipation structures 100 located at two sides of the plurality of heat dissipation structures 100 can be fixed by the aligning and fitting relationship of the aligning protrusion 510 and the aligning groove 101, so that the position and state of the end bracket 500 and the first end adapter 300 or the second end adapter 400 supported and fixed by the end bracket 500 relative to the heat dissipation structures 100 can be stabilized, especially the movement of the end bracket 500 and the first end adapter 300 or the second end adapter 400 supported and fixed by the end bracket 500 relative to the heat dissipation structures 100 along the second direction b can be limited, thereby further improving the movable movement of the adjacent two core assemblies 200 at the end side established by the first end adapter 300 or the second end adapter 400 The stability and the reliability of power connection, and can further compactify power battery's overall arrangement to do benefit to further improvement power battery's space utilization, volume group rate, do benefit to further improvement power battery's energy density.
Referring to fig. 2, 4 and 5, in the present embodiment, the alignment protrusions 510 on two sides of the end bracket are disposed at intervals in the second direction b. Correspondingly, the alignment slots 101 of the same heat dissipation structure 100 are spaced apart from each other in the second direction b.
Through adopting above-mentioned scheme, can be convenient for same heat radiation structure 100 sets up a plurality of counterpoint grooves 101 in second direction b interval to in the counterpoint cooperation through counterpoint groove 101 respectively rather than the counterpoint of the protruding 510 of counterpoint of both ends support 500 of both sides, based on this, do benefit to further compactification, regularization power battery's overall layout, especially do benefit to the whole length of reduction power battery on second direction b, thereby do benefit to the space utilization who further improves power battery, volume percentage of uniting, do benefit to the energy density that further improves power battery.
Referring to fig. 5 and 6, in the present embodiment, a plugging groove 501 is formed on one side of the end bracket 500 facing the heat dissipation structure 100, and in the plurality of heat dissipation structures 100, an end of the heat dissipation structure 100 located in the middle is inserted into the plugging groove 501.
By adopting the above scheme, the insertion groove 501 can be further inserted and matched with the end part of the heat dissipation structure 100 located in the middle of the plurality of heat dissipation structures 100, on the basis of this, on one hand, the alignment precision of the end part support 500 relative to the heat dissipation structure 100 can be correspondingly improved based on the insertion and matching relation, and the position and the state of the end part support 500 relative to the heat dissipation structure 100 can be further stabilized, so that the stability and the reliability of the power connection relation established by the two adjacent electric core assemblies 200 at the end side through the first end adapter 300 or the second end adapter 400 can be further improved; on the other hand, the insertion groove 501 can accommodate the heat dissipation structure 100 located in the middle of the plurality of heat dissipation structures 100 to correspondingly compress the length of the whole power battery in the second direction b, so that the whole layout of the power battery can be further compacted, the space utilization rate and the volume grouping rate of the power battery can be further improved, and the energy density of the power battery can be further improved.
Referring to fig. 5 and 6, in the present embodiment, the inserting groove 501 is disposed through in the extending direction.
By adopting the above scheme, the heat dissipation structure 100 located in the middle of the plurality of heat dissipation structures 100 can be conveniently, and the splicing matching can be quickly and accurately realized through the two ports of the splicing groove 501 communicated with the outside and the splicing groove 501, so that the matching convenience of the heat dissipation structure 100 located in the middle of the plurality of heat dissipation structures 100 and the end support 500 can be correspondingly improved, and the assembling convenience and the assembling efficiency of the power battery can be improved to a certain extent.
Referring to fig. 3, in the present embodiment, in the plurality of heat dissipation structures 100, the length of the heat dissipation structure 100 protruding from the electrical core assembly 200 in the middle is smaller than the length of the heat dissipation structures 100 protruding from the electrical core assembly 200 at two sides.
By adopting the scheme, the heat dissipation structures 100 are arranged in a manner that the heat dissipation structures 100 protrude and extend from the end sides of the electric core assembly 200, wherein the lengths of the heat dissipation structures 100 positioned on the two sides relative to the protruding and extending lengths of the end sides of the electric core assembly 200 are relatively long, so that the two heat dissipation structures 100 can be conveniently detachably connected with the end bracket 500, the position and the state of the end bracket 500 can be stabilized, and the stability and the reliability of the power connection of the two adjacent electric core assemblies 200 on the end sides can be guaranteed; and the length that the lateral protrusion of heat radiation structure 100 for electric core subassembly 200 that is located the centre extends is shorter relatively, on the basis of this, can be on the basis of the radiating effect of guarantee this heat radiation structure 100 to electric core subassembly 200's side, and on the basis of the stable utility of the position of this heat radiation structure 100 to end support 500 and state, the length of this heat radiation structure 100 on second direction b of corresponding compression, thereby can further compress the whole length on second direction b of power battery, can further compactify power battery's overall layout, thereby do benefit to further improvement power battery's space utilization, volume percentage of uniting, do benefit to further improvement power battery's energy density.
Referring to fig. 3, 5 and 6, in the present embodiment, the first end adapter 300 or the second end adapter 400 is disposed on a side of the end support 500 away from the electric core assembly 200, the end support 500 is provided with through holes 502 on both sides of the first end adapter 300 or the second end adapter 400, and the through holes 502 are used for allowing the tabs of the electric core assembly 200 to pass through so as to be electrically connected to the first end adapter 300 or the second end adapter 400.
By adopting the above scheme, the power connection relationship between the tab of the power core assembly 200 and the first end adapter 300 or the second end adapter 400 can be established through each through hole 502, based on this, the corresponding connection between the end support 500 and the heat dissipation structure 100 can be conveniently realized, so as to stabilize the position and the state of the end support 500 and the first end adapter 300 or the second end adapter 400, and then the power connection between the first end adapter 300 or the second end adapter 400 and the power core assembly 200 can be realized, so as to obtain the power connection relationship with better stability and reliability, and further improve the assembly convenience and the assembly efficiency of the power battery.
Referring to fig. 2 and 3, in the present embodiment, the power battery further includes two end plates 600, the two end plates 600 are respectively disposed at two ends of the heat dissipation structure 100 and cover the end bracket 500, and two ends of the end plates 600 are respectively abutted to the two heat dissipation structures 100 with the largest distance in the first direction a.
Through adopting above-mentioned scheme, the accessible is at the biggest two heat radiation structure 100 of interval distance in first direction a, the butt encloses in the end plate 600 of two heat radiation structure 100 one ends and the butt in the end plate 600 of two heat radiation structure 100 other ends and closes and form an annular space, based on this, not only accessible end plate 600 is to end support 500, certain protection is realized to the outside of first end adaptor 300 and second end adaptor 400, still can further compactification, regularization power battery's overall arrangement, thereby do benefit to further improvement power battery's space utilization, volume percentage of groups, do benefit to further improvement power battery's energy density.
Referring to fig. 2 and 3, in the present embodiment, at least one abutting structure 610 is connected to the end plate 600 at a side facing each end bracket 500.
By adopting the above scheme, each abutting structure 610 can abut between the body of the end plate 600 and the end support 500, so that a stable distance exists between the side face of the end plate 600 and the side face of the end support 500, and therefore, the accommodating space for accommodating the first end adapter 300 or the second end adapter 400 can be formed between the side face of the end plate 600 and the side face of the end support 500, and the risk that the end plate 600 extrudes and damages the first end adapter 300 or the second end adapter 400 can be reduced, so that the protective effect of the end plate 600 on the end support 500, the first end adapter 300 and the second end adapter 400 can be further ensured and improved, the overall layout of the power battery can be further compacted and normalized, and the space utilization rate and the volume grouping rate of the power battery can be further improved, and the energy density of the power battery can be further improved.
Referring to fig. 3, 7, and 8, in the present embodiment, the power battery further includes a liquid cooling assembly 700, where the liquid cooling assembly 700 includes a water inlet connector 710, a water outlet connector 720, and a liquid cooling plate 730 integrally connected to the same side of each heat dissipation structure 100, the liquid cooling plate 730 abuts against an end surface of each electric core assembly 200 facing the liquid cooling plate 730, the liquid cooling plate 730 is provided with a plurality of cooling channels 731 respectively communicated with the water inlet connector 710 and the water outlet connector 720, and each cooling channel 731 is at least partially aligned with an end surface of each electric core assembly 200.
It should be noted that, through the water inlet connector 710, the cooling liquid may be input into the liquid cooling plate 730, and after entering the liquid cooling plate 730, the cooling liquid may flow into each cooling flow passage 731, and the cooling liquid can gradually take away a certain amount of heat while flowing along each cooling flow passage 731 to the water outlet connector 720. In this embodiment, an end surface of each core assembly 200 directly abuts against the liquid cooling plate 730, and the cooling channel 731 at least partially flows through the end surface. Based on this, when the electric core assembly 200 generates heat, the heat of the end surface directly contacting with the liquid cooling plate 730 can be directly taken away by the cooling liquid in the cooling flow channel 731, thereby realizing the heat dissipation of the electric core assembly 200. Based on this, this embodiment has effectively shortened the heat conduction route between electric core subassembly 200 and liquid cooling board 730 through making electric core subassembly 200 and liquid cooling board 730 direct contact, so not only can ensure and improve electric core subassembly 200's heat dispersion, still can effectively compress power battery's whole weight to improve power battery's holistic energy density.
It should be further noted that, each heat dissipation structure 100 is integrally connected with the liquid cooling plate 730, so that, on one hand, the relative position and the fixed state of each heat dissipation structure 100 can be conveniently stabilized, and a certain guarantee can be formed on the structural strength of each heat dissipation structure 100, thereby guaranteeing the utility reliability and the stability of each heat dissipation structure 100; on the other hand, it is also beneficial to ensure and improve the heat conduction efficiency between each heat dissipation structure 100 and the liquid cooling plate 730.
Therefore, by adopting the above scheme, on one hand, the electric core assemblies 200 and the liquid cooling plate 730 can be in direct contact, and the cooling channels 731 at least partially flow through the end surfaces of the electric core assemblies 200, so as to effectively shorten the heat conduction path between the electric core assemblies 200 and the liquid cooling plate 730, thereby further improving the heat dissipation performance of the power battery, and also effectively compressing the overall weight of the power battery, so as to improve the overall energy density of the power battery; on the other hand, the heat that accessible heat radiation structure 100 deviates from the relative both sides of electric core subassembly 200 even liquid-cooled plate 730 one side conducts fast to liquid-cooled plate 730 with heat radiation structure 100 body coupling to realize further heat dissipation, thereby can further optimize power battery's heat dispersion, and can further reduce electric core subassembly 200 deviate from liquid-cooled plate 730 one side and face the temperature difference size between liquid-cooled plate 730 one side, thereby can further improve the temperature homogeneity of electric core subassembly 200 in the operation process, with the performance that further improves power battery.
Referring to fig. 1, an embodiment of the present invention further provides an electric vehicle, including a power battery.
By adopting the scheme, the service performance of the electric automobile can be effectively improved and optimized by the power battery with better heat dissipation performance and service performance and higher space utilization rate, volume grouping rate and energy density.
The above description is only exemplary of the present invention and should not be taken as limiting the scope of the present invention, as any modification, equivalent replacement or improvement made within the spirit and principle of the present invention should be included in the present invention.
Claims (10)
1. A power cell, comprising:
the heat dissipation structure comprises a plurality of heat dissipation structures which are arranged at intervals along a first direction, each heat dissipation structure extends along a second direction, and the first direction and the second direction form a preset angle;
the electric core assembly is arranged between two adjacent heat dissipation structures, and two opposite side surfaces of the electric core assembly are abutted to the heat dissipation structures;
the first end adapter is arranged at one end of the electric core assembly and used for connecting two adjacent electric core assemblies;
the second end adapter is arranged at the other end of the electric core assembly and used for connecting two adjacent electric core assemblies;
and a plurality of end supports for supporting the first end adapter or the second end adapter, wherein each end support is correspondingly connected with a plurality of heat dissipation structures which are continuously arranged.
2. The power battery as claimed in claim 1, wherein the end bracket has at least one alignment protrusion protruding from each of two sides thereof, and two of the heat dissipation structures located on two sides of the end bracket have alignment grooves for mating with the alignment protrusions, and one end of each alignment groove is connected to the outside in the extending direction thereof.
3. The power cell of claim 2, wherein said alignment tabs on both sides of said end bracket are spaced in said second direction.
4. The power battery as claimed in claim 2, wherein a slot is formed on a side of the end bracket facing the heat dissipation structure, and an end of the heat dissipation structure located in the middle among the plurality of heat dissipation structures is inserted into the slot, and the slot is disposed to extend through the slot.
5. The power cell of claim 4, wherein, of the plurality of heat dissipation structures, the length of the heat dissipation structure protruding from the electric core assembly in the middle is smaller than the length of the heat dissipation structure protruding from the electric core assembly on both sides.
6. The power battery according to claim 1, wherein the first end adapter or the second end adapter is disposed on a side of the end bracket facing away from the electric core assembly, and the end bracket is provided with through holes on both sides of the first end adapter or the second end adapter, and the through holes allow tabs of the electric core assembly to pass through so as to be electrically connected with the first end adapter or the second end adapter.
7. The power cell as defined in claim 1, wherein the power cell further comprises:
and the two end plates are respectively arranged at two ends of each heat dissipation structure and cover the end part support, and two ends of each end plate are respectively abutted to the two heat dissipation structures with the largest spacing distance in the first direction.
8. The power cell of claim 7, wherein at least one retaining structure is attached to the end plate on a side thereof facing each of the end brackets.
9. The power cell of any of claims 1-8, further comprising:
the liquid cooling assembly comprises a water inlet connector, a water outlet connector and liquid cooling plates which are integrally connected to the same side of the heat dissipation structure, the liquid cooling plates are abutted to the end faces of the electric core assemblies facing the liquid cooling plates, the liquid cooling plates are provided with a plurality of cooling flow passages communicated with the water inlet connector and the water outlet connector, and the cooling flow passages are at least partially aligned to the end faces of the electric core assemblies.
10. An electric vehicle characterized by comprising the power battery according to any one of claims 1 to 9.
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|---|---|---|---|
| CN202021884028.3U CN213366662U (en) | 2020-09-01 | 2020-09-01 | Power battery and electric automobile |
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| CN202021884028.3U CN213366662U (en) | 2020-09-01 | 2020-09-01 | Power battery and electric automobile |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112349991A (en) * | 2020-09-14 | 2021-02-09 | 比亚迪股份有限公司 | Battery energy storage device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112349991A (en) * | 2020-09-14 | 2021-02-09 | 比亚迪股份有限公司 | Battery energy storage device |
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