CN211605207U - Lithium ion battery pack - Google Patents
Lithium ion battery pack Download PDFInfo
- Publication number
- CN211605207U CN211605207U CN202020503648.1U CN202020503648U CN211605207U CN 211605207 U CN211605207 U CN 211605207U CN 202020503648 U CN202020503648 U CN 202020503648U CN 211605207 U CN211605207 U CN 211605207U
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- cover plate
- edge
- lithium ion
- ion battery
- battery pack
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- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 title claims abstract description 52
- 229910001416 lithium ion Inorganic materials 0.000 title claims abstract description 52
- 239000004020 conductor Substances 0.000 claims abstract description 94
- 238000009413 insulation Methods 0.000 claims abstract description 25
- 239000006260 foam Substances 0.000 claims description 13
- RNFJDJUURJAICM-UHFFFAOYSA-N 2,2,4,4,6,6-hexaphenoxy-1,3,5-triaza-2$l^{5},4$l^{5},6$l^{5}-triphosphacyclohexa-1,3,5-triene Chemical compound N=1P(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP=1(OC=1C=CC=CC=1)OC1=CC=CC=C1 RNFJDJUURJAICM-UHFFFAOYSA-N 0.000 claims description 10
- 239000003063 flame retardant Substances 0.000 claims description 10
- 229920000742 Cotton Polymers 0.000 claims description 6
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 6
- 230000000149 penetrating effect Effects 0.000 claims description 6
- 239000002390 adhesive tape Substances 0.000 claims description 4
- 239000000741 silica gel Substances 0.000 claims description 4
- 229910002027 silica gel Inorganic materials 0.000 claims description 4
- 229910000831 Steel Inorganic materials 0.000 claims description 3
- 229910052782 aluminium Inorganic materials 0.000 claims description 3
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 3
- 229910052751 metal Inorganic materials 0.000 claims description 3
- 239000002184 metal Substances 0.000 claims description 3
- 239000010959 steel Substances 0.000 claims description 3
- 230000009286 beneficial effect Effects 0.000 abstract description 3
- 238000005452 bending Methods 0.000 description 15
- 238000000034 method Methods 0.000 description 9
- 230000008569 process Effects 0.000 description 8
- 238000009434 installation Methods 0.000 description 4
- 239000000463 material Substances 0.000 description 4
- 239000000853 adhesive Substances 0.000 description 3
- 230000001070 adhesive effect Effects 0.000 description 3
- 238000007599 discharging Methods 0.000 description 3
- 238000001125 extrusion Methods 0.000 description 3
- 230000002349 favourable effect Effects 0.000 description 3
- 230000017525 heat dissipation Effects 0.000 description 3
- 238000009825 accumulation Methods 0.000 description 2
- 239000008119 colloidal silica Substances 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- 230000005484 gravity Effects 0.000 description 2
- 230000001737 promoting effect Effects 0.000 description 2
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 1
- 229920000297 Rayon Polymers 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000003139 buffering effect Effects 0.000 description 1
- 238000005253 cladding Methods 0.000 description 1
- 239000012141 concentrate Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 229910052744 lithium Inorganic materials 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 238000012536 packaging technology Methods 0.000 description 1
- 238000002791 soaking Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
Images
Classifications
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
-
- 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
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- Battery Mounting, Suspending (AREA)
Abstract
The utility model relates to a lithium ion battery field discloses a lithium ion battery group, include: the battery cores are sequentially attached to each other face to face along the thickness direction, the two end plates respectively cover the left end face and the right end face of the battery core group in the thickness direction, and the battery core group is clamped between the two end plates; the upper cover plate and the lower cover plate are respectively covered on the top surface and the bottom surface of the electric core group, the left edge and the right edge of the upper cover plate and the right edge of the lower cover plate are respectively bent edges bent downwards, and the bent edges of the upper cover plate and the lower cover plate are respectively covered and fastened on the outer surfaces of the left end plate and the right end plate; the two bus conductor insulation supports are respectively covered on the front end face and the rear end face of the electric core group, which are vertical to the width direction, the bus conductors are arranged on the outer surfaces of the bus conductor insulation supports, and the pole lugs also respectively extend out of the second through holes and are welded on the bus conductors. The application of the technical scheme is beneficial to reducing the cost of the lithium ion battery pack and improving the energy density of the lithium ion battery pack.
Description
Technical Field
The utility model relates to a lithium ion battery prepares the field, discloses a lithium ion battery group.
Background
Along with the popularization of the global environmental protection idea, the new energy electric vehicle gradually enters the mass market, and how to improve the endurance mileage of the new energy vehicle becomes an industrial technical problem, wherein the new energy vehicle of the lithium battery is used as a power source, the lithium ion battery packaging technology is concerned with the safety performance of the subsequent PACK and the battery cell using process, and the function played in the new energy vehicle is very key.
Disclosure of Invention
An object of the embodiment of the utility model is to provide a lithium ion battery group uses this technical scheme to be favorable to reducing the cost of lithium ion battery group to improve the energy density of lithium ion battery group.
In a first aspect, an embodiment of the present invention provides a lithium ion battery pack, including:
the battery core group comprises a plurality of lithium ion battery cells, wherein the battery cells are sequentially attached to each other face to face along the thickness direction of the battery cells, the thickness direction of the battery cells is the horizontal left and right direction, and two electrode lugs of each battery cell respectively extend out of two width end faces of each battery cell;
the left end plate and the right end plate respectively cover the opposite left end surface and the right end surface of the electric core group in the thickness direction, and the electric core group is clamped between the two end plates;
the upper cover plate and the lower cover plate are respectively covered on the top surface and the bottom surface of the electric core pack, bent edges bent downwards are respectively arranged at the left edge and the right edge of the upper cover plate and the lower cover plate, and the bent edges of the upper cover plate and the lower cover plate are respectively covered and fastened on the outer surfaces of the left end plate and the right end plate;
the two bus conductor insulating supports respectively cover the front end face and the rear end face of the electric core assembly perpendicular to the width direction, the upper edge and the lower edge of each bus conductor insulating support are respectively and fixedly connected with the front edge and the rear edge of the upper cover plate and the lower cover plate, a plurality of first through holes are respectively formed in each bus conductor insulating support, and each lug respectively extends out of each first through hole opposite to the lug;
and the bus conductors are used for connecting the lugs in series and parallel, are arranged on the outer surfaces of the bus conductor insulating supports, are respectively provided with a plurality of second through holes, are respectively opposite to the first through holes, and also respectively extend out of the second through holes and are welded on the bus conductors.
Optionally, a double-sided adhesive tape is further adhered between the opposite surfaces of the battery cells.
Optionally, at least one flame-retardant foam sheet is arranged in the electric core group at intervals, and two surfaces of the flame-retardant foam sheet are respectively adhered to the electric cores on two surfaces of the flame-retardant foam sheet.
Optionally, flame-retardant foam sheets are further respectively arranged between the left end plate and the right end plate and between the electric core assembly and adhered to the left end plate and the right end plate.
Optionally, a flame-retardant foam sheet is further adhered between the upper cover plate and the electric core assembly.
Optionally, a heat conducting silica gel is further filled between the lower cover plate and the electric core group.
Optionally, the heat-conducting silica gel located at the bottom of the battery core group is fully distributed on the bottom end surfaces of the battery cores, and fills gaps between the battery cores on the bottom end surfaces.
Optionally, a plurality of protrusions are further disposed on the inner surface of the bus conductor insulating support facing the electric core group, and at least one protrusion is spaced between any two adjacent first through holes.
Optionally, at least two protrusions between any two adjacent first through holes are arranged in a straight line.
Optionally, each protrusion extends from an inner surface of the bus conductor insulating holder to a tip end direction of the protrusion:
the width of the protrusion is gradually narrowed down,
and the distance between the protrusions on two sides of any one first through hole is gradually widened from the tail end of the protrusion to the inner surface direction of the bus conductor insulating bracket.
Optionally, each of the bus conductor insulating supports includes: an upper edge, a lower edge, and a bracket body located between the upper edge and the lower edge,
the upper edge and the lower edge are respectively provided with a screw hole in the vertical direction, each bus conductor insulating bracket is fastened between the upper cover plate and the lower cover plate through the screw hole in a vertical penetrating way,
each first through hole and each bulge are respectively arranged on the support main body.
Optionally, the thickness of the upper and lower edges is thicker than the thickness of the stent body.
Optionally, the outer surface of the bracket body is a recessed platform recessed relative to the upper and lower edges, and the bus conductors are mounted on the recessed platform.
Optionally, the outer surface of the bus conductor is level with or lower than the upper and lower edges.
Optionally, each bus conductor insulation support is respectively composed of a plurality of splicing pieces spliced left and right,
each of the splices includes the upper edge, the lower edge, and the bracket body, respectively.
Optionally, the front and rear end surfaces of the electric core group are respectively covered with an insulating protection plate,
the bus conductor insulating support and the bus conductor are covered on the inner side of the protection plate.
Optionally, the front and rear edges of the lower cover plate are respectively a U-shaped bent edge, and when the lower cover plate is padded at the bottom of the electric core assembly, the electric core assembly is limited between the U-shaped bent edges of the front and rear edges of the lower cover plate;
the front edge and the rear edge of the upper cover plate are respectively an inverted U-shaped bent edge, and when the upper cover plate covers the top of the electric core group, the electric core group is limited between the inverted U-shaped bent edges at the front edge and the rear edge of the upper cover plate;
the bus conductor insulating support is respectively fastened between the U-shaped bent edge and the inverted U-shaped bent edge which are opposite up and down.
Optionally, screw holes with axial direction vertical direction are respectively arranged on the upper edge and the lower edge of the bus conductor insulating bracket,
the upper edge and the lower edge of the bus conductor insulating support are respectively fastened between the upper cover plate and the lower cover plate through screws penetrating through screw holes in the U-shaped groove body on the U-shaped bent edge of the upper cover plate and the inverted U-shaped groove body on the inverted U-shaped bent edge of the lower cover plate.
Optionally, the upper and lower edges of each of the insulating protection plates are respectively bent inwards, the bent ends are vertical edges,
the vertical edge at the upper edge of the insulation protection plate is limited in the U-shaped groove body of the upper cover plate, and the vertical edge at the lower edge is limited in the inverted U-shaped groove body of the lower cover plate.
Optionally, the left end plate and the right end plate are respectively rigid plastic end plates.
Optionally, the left end plate and the right end plate are respectively provided with a plurality of non-through hole portions.
Alternatively, the open end of each of the hole portions is provided on the outer surface of the left and right end plates.
Optionally, the axial direction of each hole part is the same as the thickness direction of the electric core group.
Optionally, the front and rear edges of the left end plate and the right end plate are respectively provided with a screw hole with an axial direction being a vertical direction.
Optionally, the left end plate and the right end plate are respectively provided with a hole portion at the front edge and the rear edge, and a hexagonal nut is embedded in the hole portion.
Optionally, the left end plate and the right end plate are respectively of an integrally molded structure.
Optionally, the upper cover plate and the lower cover plate are respectively a heat conducting metal plate.
Optionally, the upper cover plate and the lower cover plate are respectively a steel plate and an aluminum plate.
Optionally, the upper cover plate and the lower cover plate are respectively of an integrally molded structure.
It is from top to bottom visible, adopt this embodiment's group battery structure, each electric core inclines respectively to stand on the apron, the gravity of each electric core acts on respectively on being located the lower apron of its bottom, and can not act on other electric cores, adopt this technical scheme to break through the limited problem of the electric core quantity of prior art, and then, as long as the space of putting the group battery is enough to allow, can follow the group battery in the range upon range of more electric cores of thickness direction range upon range of more electric cores of electric core and then constitute the electric core group of constituteing by more electric cores, this technical scheme's implementation is favorable to promoting high multiplying power large capacity power battery's application, be particularly suitable for.
And, in this embodiment, upper and lower apron is respectively through buckling the end plate of the limit of buckling and the electric core group thickness both sides of end plate surface, the main middle part at each electric core that concentrates on of the bulging force of electric core group working process, the main thickness direction transmission of electric core of edge is followed to the end plate that lies in about tip to its bulging force direction, and then transmit to through buckling the upper and lower apron of limit fastening cladding on the terminal surface of two end plates, bear the bulging force of electric core charging and discharging in-process through upper and lower apron, adopt the technical scheme of tie for prior art, the intensity of bearing the bulging force of this embodiment structure is bigger, the structure is more firm.
Moreover, heat generated in the working process of each battery cell of the embodiment can be respectively transferred to both the upper cover plate and the lower cover plate or at least one of the upper cover plate and the lower cover plate to be dissipated to the outside, so that heat accumulation is avoided, and compared with a battery pack structure in the prior art, the battery pack of the embodiment has higher heat dissipation efficiency.
To sum up, use this embodiment structure in lithium ion battery, on the basis of reducing the supporting part save material of group battery and reducing material cost, the energy density of group battery has been improved, and, still promoted the heat dispersion of battery, break through the electric core quantity restriction of the thickness direction of the inherent electric core group of group battery, as long as the space of putting the group battery is enough to allow, can follow the range upon range of more electric cores of the thickness direction of electric core in the group battery and then constitute the electric core group of constituteing by more electric cores, the implementation of this technical scheme is favorable to promoting the application of high multiplying power large capacity power battery, especially, is fit for being applied to car power battery.
Drawings
Fig. 1 is a schematic perspective view of a lithium ion battery pack (without a protection plate) provided in embodiment 1 of the present invention;
FIG. 2 is a schematic diagram of the right side view of the structure of FIG. 1;
FIG. 3 is a schematic front view of the structure of FIG. 1;
FIG. 4 is a schematic view of the cross-sectional structure A-A of FIG. 3;
fig. 5 is a schematic perspective view of the left end plate and the right end plate according to the embodiment of the present invention;
FIG. 6 is a schematic front view of the structure of FIG. 5;
FIG. 7 is a rear view of the structure of FIG. 5;
FIG. 8 is a schematic top view of the structure of FIG. 5;
FIG. 9 is a left side view of the structure of FIG. 5;
fig. 10 is a schematic bottom view of an upper cover plate according to an embodiment of the present invention;
FIG. 11 is a schematic view of the left and right side structures of FIG. 10;
FIG. 12 is a front and rear side view of the FIG. 10;
fig. 13 is a schematic bottom view of the upper cover plate according to the embodiment of the present invention;
FIG. 14 is a schematic view of the left and right side structures of FIG. 13;
FIG. 15 is a front and rear side view of the FIG. 13;
fig. 16 is a schematic perspective view of a bus bar support according to an embodiment of the present invention;
FIG. 17 is a schematic view of the outer surface configuration of a bus bar support;
FIG. 18 is a schematic view of the inner surface configuration of the bus bar support;
FIG. 19 is a schematic view of the upper and lower end faces of the bus bar support;
FIG. 20 is a schematic view of the structure of the left and right end faces of the bus bar support;
FIG. 21 is a schematic view of a splice assembly of the bus bar support;
FIG. 22 is a schematic view showing the assembling structure of the bus bar support and the bus bar conductors on the front and rear end faces of the electric core pack;
FIG. 23 is a schematic view of the cross-sectional structure A-A of FIG. 22;
fig. 24 is a schematic view of the installation structure of the insulation protection plate at the left and right ends of the electric core assembly according to the embodiment of the present invention.
Reference numerals:
11: a left end plate; 12: a right end plate; 13: a first hole part; 14: a first screw hole; 15: screw hole II
21: an upper cover plate; 22: a lower cover plate; 23: bending the edges; 24: a third screw hole; 25: a hole part II; 26: a U-shaped groove; 27: an inverted U-shaped groove;
3: a hexagon bolt;
31: an upper edge; 32: a lower edge; 33: a first through hole; 34: splicing pieces; 35: splicing the interfaces;
36: a boss portion; 37: a protrusion; 38: a screw hole IV; 39: a stent body; 40: a fastening part;
4: an insulating protection plate; 41: bending the edge; 42: a vertical edge;
51: soaking cotton sheets; 52: an electric core; 53: a tab;
61: a bus conductor.
Detailed Description
The invention will be described in detail with reference to the drawings and specific embodiments, wherein the exemplary embodiments and descriptions are provided to explain the invention, but not to limit the invention.
Example 1:
referring to fig. 1 to 24, the present embodiment provides a lithium ion battery pack, which mainly includes: the group of electric cores, the end plates 11, 12, the cover plates 21, 22, the bus conductor insulating holders, and the bus conductors 61.
The battery core group is formed by combining a plurality of lithium ion battery cells 52 (hereinafter referred to as cells 52). The tab 53 of each cell 52 extends from the end face of the width of each cell 52. Each battery cell 52 is arranged face to face in sequence along the thickness direction of the battery cell 52, and the thickness direction of the battery cell group is consistent with the thickness direction of each battery cell 52, that is, the thickness of the battery cell group is formed by the thicknesses of all the battery cells 52 arranged together. In the present embodiment, the positive and negative electrode tabs 53 of the battery cell 52 respectively protrude from the two width end surfaces of the battery cell 52, but the present invention is not limited thereto.
As a schematic illustration of the present embodiment, each of the cells 52 is erected laterally, the thickness direction of the cell 52 is set on the X axis in the horizontal direction, the Y axis in the horizontal direction is the length direction of the cell 52, and the Z axis in the vertical direction is the width direction of the cell 52, the surfaces of the cell 52 with the length and the thickness as the side length are respectively attached to the bottom surface and the top surface of the core pack, and the surfaces of the cell 52 with the length and the width as the side length are attached to each other in a manner of being opposed to each other perpendicularly to the X axis surface, so that the cells 52 are sequentially closely arranged from left to right or from right to left in the X axis direction, thereby forming the core pack.
The tab 53 of each cell 52 extends from the end face of the width of the cell 52 (i.e., the end face with the thickness and width of the cell as the side length), i.e., from the front and rear end faces in the Y-axis direction. So that the subsequent process realizes the series-parallel connection of the electric core groups by connecting the protruded tabs 53 according to a predetermined series-parallel scheme, thereby constituting a battery pack. The structure of the battery pack will be described below by using the arrayed electric core pack as an illustration, but the present invention is not limited thereto.
As an illustration of the present embodiment, during assembly, it is further preferable, but not limited to, to stick adhesive on the opposite surfaces between the battery cells 52, so that the opposite surfaces of every two adjacent battery cells 52 are respectively stuck together by the adhesive to form a compact battery cell assembly, wherein a double-sided tape can be, but not limited to, used as the adhesive, and the double-sided tape has the advantages of low cost and convenient operation.
As an illustration of the present embodiment, two or more than two battery cells 52 may be used as a group, each battery cell 52 in each group is pasted together face to face through a double-sided adhesive tape, the buffer foam sheets 51 are respectively spaced between each group, for example, but not limited to, the double-sided adhesive tapes are also pasted on both sides of the buffer foam sheets 51, and both sides of the buffer foam sheets 51 are respectively combined with two groups of battery cells on both sides thereof, so as to combine each group of battery cells to form an integral battery cell group. By adopting the technical scheme, the modular design of the battery cell group is facilitated, the battery cell group is particularly suitable for a super-capacity battery pack, and the slow brewing cotton sheets 51 among the groups can reserve space for expansion possibly generated in the charging and discharging process of the battery cells. In practical application, the expansion space required to be reserved can be calculated according to the number of the electric cores in the battery pack system, so that the thickness and the number of the slow-brewing cotton sheets 51 are set, and the extrusion force between the electric cores in the whole life cycle of the battery pack is buffered.
After the electric core group is arranged to form the electric core group in groups, the two end plates are respectively fixed outside the opposite left end surface and right end surface in the thickness direction of the electric core group, namely, the left end plate 11 and the right end plate 12 are respectively covered on the left end surface of the electric core 52 positioned on the outermost side of the left side of the electric core group and the right end surface of the electric core 52 positioned on the outermost side of the right side, and the left end plate 11 and the right end plate 12 clamp and fasten each electric core 52 between the left end plate 11 and the right end plate 12 from the thickness direction of the electric core group. Referring to the drawings, the left and right end plates 11 and 12 of the present embodiment are perpendicular to the X-axis, and are disposed on the left and right sides of the electric core pack.
By way of illustration of this embodiment, this embodiment is preferably, but not limited to, employing rigid plastic endplates. In order to increase the rigidity of the end plate in the thickness direction of the battery cell 52, it is preferable that the present embodiment employs a thick end plate, and a plurality of hole portions 13 are provided in the left end plate 11 and the right end plate 12 in the axial direction in the thickness direction of the battery cell 52, and each hole portion 13 has a non-through structure. Preferably, but not limited to, the opening of each hole portion one 13 is located on the outer surface of the left end plate 11 and the right end plate 12, respectively, so that the left end plate 11 and the right end plate 12 are solid at the portion facing the electric core group. By adopting the structure, on the basis of reducing the weight of the end plate and improving the energy density of the lithium ion battery pack, the left end plate 11 and the right end plate 12 are ensured to have enough rigidity in the thickness direction of the battery cell pack, and the bearing strength of the extrusion force of the end plate which vertically acts on the end plate when the end plate expands in the charge and discharge processes of the battery cell 52 is ensured.
As an illustration of the present embodiment, screw holes 14 are preferably respectively disposed at the front and rear edges of the left and right end plates 11, 12 for connecting external devices, and the axial direction of the screw holes 14 is along the Z-axis, so as to mount the four corners of the battery pack structure onto external power devices, such as but not limited to, under the chassis of a power car. As an illustration of the present embodiment, but not limited to, the front and rear edges of the left end plate 11 and the right end plate 12 are respectively provided with a hole portion, a hexagon nut is embedded in the hole portion, and the internal thread of the hexagon nut is used as the first screw hole 14 for screw or bolt connection, so that the probability of wire sliding is reduced, and the stability and reliability of connection are improved.
As an indication of this embodiment, a slow brewing cotton sheet 51 may be further pasted between the left end plate 11, the right end plate 12 and the electric core assembly, and the left end plate 11 and the right end plate 12 are positioned and pasted on the left and right end surfaces of the electric core assembly by the viscose on the surface of the slow brewing cotton sheet 51, so as to facilitate the positioning of the end plates before the upper cover plate 21 and the lower cover plate 22 are fastened.
After the left end plate 11 and the right end plate 12 are positioned, the cover plates are respectively covered outside the upper end surface and the lower end surface of the electric core group, the upper cover plate 21 and the lower cover plate 22 are respectively vertical to the Z axis, the cover plate covered on the top of the electric core group is marked as the upper cover plate 21, and the cover plate padded at the bottom of the electric core group is marked as the lower cover plate 22. The length of one side of the upper cover plate 21 and the lower cover plate 22 corresponds to the thickness of the cell group (including the sum of the thicknesses of all the cells 52) and is slightly larger than the thickness, and the length of the other side of the upper cover plate 21 and the lower cover plate 22 corresponds to the width of the cells 52 and is slightly larger than the width, so that the upper cover plate 21 and the lower cover plate 22 respectively cover all the cells 52 in the cell group and are tightly attached to all the cells, and the heat conduction between all the cells and the cover plate is convenient.
Bent edges 23 bent in the direction of the end plate are formed at the left and right edges of the upper cover plate 21 and the lower cover plate 22, respectively, until the bent edges are bent in the Z-axis direction. During the concrete assembly, with lower cover plate 22 pad in the bottom of electric core group, two bent edges 23 of lower cover plate 22 outside the both ends of the thickness direction of electric core group respectively, make its upwards perpendicular bending's of bending edge 23 cover and fasten at the surface of left end board 11, right end board 12, realized the fastening connection of left end board 11, right end board 12.
Similarly, the upper cover plate 21 is completely covered on the top surface of the cell pack, the two bent folding edges 23 of the upper cover plate 21, which are vertically bent downwards, are covered on the outer surfaces of the left end plate 11 and the right end plate 12, and the two bent folding edges 23 are fastened on the left end plate 11 and the right end plate 12 through screws in the screw holes III 24, so that the fastening connection of the upper cover plate 21 to the left end plate 11 and the right end plate 12 is realized.
It can be seen from above that, the bending edges 23 at the left and right ends of the upper cover plate 21 and the lower cover plate 22 tightly fasten the left end plate 11 and the right end plate 12 at the two ends of the thickness direction of the battery cell group from the outer surfaces of the left end plate 11 and the right end plate 12 respectively, and the upper cover plate 21 and the lower cover plate 22 bear the extrusion force of the battery cells received by the left end plate 11 and the right end plate 12.
As an illustration of the present embodiment, at least four second screw holes 15 may be provided on the upper and lower portions of the left and right end plates 11, 12, respectively (the second screw holes 15 may also be formed by embedding nuts in the hole portions, the nuts are preferably but not limited to hexagonal nuts, so as to improve the positioning and fastening degree of the nuts in the hole portions and avoid thread slipping), at least two portions of the bent edges 23 of the upper and lower cover plates 21, 22 are connected to the end plate on the side thereof by screws, so as to fully lock the bent edges 23 and the end plate, and secure the fastening of the upper and lower cover plates 21, 22 to the left and right end plates 11, 12. The bolt is preferably but not limited to be a hexagon bolt 3, so that the assembly and disassembly of the pack structure are facilitated, and the convenience of maintenance is improved.
As an illustration of the present embodiment, the present embodiment preferably, but not limited to, uses a metal plate with good rigidity and good thermal conductivity as the upper cover plate 21 and the lower cover plate 22, such as, but not limited to, a steel plate, an aluminum plate, or other alloy plate, wherein the cover plates may be implemented with thin cover plates.
So far, the assembly of the main atress bearing structure of electric core group is accomplished, and left end plate 11, right end plate 12 will be in the same place electric core 52 fastening side by side on the thickness direction of electric core group, and upper cover plate 21, lower apron 22 wrap up the electric core group from the top and the bottom of electric core group to fastening left end plate 11, right end plate 12 provide the pack structure for the electric core group.
As an indication of this embodiment, the bending edge 23 on the upper cover plate 21 and the lower cover plate 22 of this embodiment and the cover plate are integrated, which is beneficial to improving the tightness of the upper cover plate 21 and the lower cover plate 22 to the left end plate 11 and the right end plate 12, improving the bearing strength of the upper cover plate 21 and the lower cover plate 22 to the expansive force along the thickness direction of the battery pack, and ensuring the tightness of the pack structure of the lithium ion battery pack.
After the left end plate 11, the right end plate 12, the upper cover plate 21 and the lower cover plate 22 are fastened and installed, the bus conductor insulation support is installed on two width end faces of the electric core group, wherein the two width end faces are extended from the lugs 53, so that the lugs 53 extended from the width end faces are insulated, isolated and positioned, and the bus conductors 61 installed on the bus conductor insulation support are used for connecting the electric cores 52 in series and parallel.
The bus conductor insulating supports are perpendicular to the Y axis and are positioned on the front end face and the rear end face of the electric core group. The upper edge 31 and the lower edge 32 of the bus conductor insulating bracket are respectively connected with the front edge and the rear edge of the upper cover plate 21 and the lower cover plate 22. The upper edge 31 and the lower edge 32 of the bus conductor insulating bracket may be provided with four screw holes 38 along the Z-axis direction, respectively, the front and rear edges of the upper cover plate 21 and the lower cover plate 22 are provided with two corresponding hole portions 25, respectively, and the bus conductor insulating bracket may be fixedly connected to the upper cover plate 21 and the lower cover plate 22 by screws. So far, the four sides of the electric core group are all encapsulated.
The bus conductor insulating support on each width end face is provided with a plurality of through holes (marked as first through holes 33), the shape of each first through hole 33 is matched with the shape of the lug 53, the first through holes are long and consistent with the quantity of the lugs 53 extending out of the width end face by the electric core group, each lug 53 at the end extends out of each first through hole 33 of the bus conductor insulating support, the bus conductor insulating support positions and insulates the lug 53 at the end face, and short circuit caused by bending of the lug 53 is avoided.
As an illustration of the present embodiment, in order to improve the application flexibility of the components, the bus conductor insulation bracket of the present embodiment is preferably, but not limited to, formed by splicing a plurality of small pieces of the splice 34. For example, but not limited to, the splicing openings 35 and the protrusions 36 are respectively disposed on the opposite edges of each splicing member 34, and the splicing openings 35 and the protrusions 36 on the opposite edges of two adjacent splicing members 34 can be spliced to form an integral bus conductor insulation bracket.
As an illustration of the present embodiment, a plurality of protrusions 37 are further provided on the inner surface (the surface facing the battery cell group) of the bus conductor insulating holder, the protrusions 37 are spaced between the first through holes 33 for penetrating the tabs 53, when the battery pack is mounted, the tabs 53 respectively penetrate through the first through holes 33 between the protrusions 37 and extend outward, and the protrusions 37 isolate the tabs 53 extending from the battery cells 52 from the inside of the battery pack, thereby ensuring electrical safety and stability.
As an illustration of the present embodiment, at least two protrusions 37 are separately provided on each side of the first through holes 33 on the inner surface of the bus bar conductor insulating holder, and the protrusions 37 are arranged in a row on the side of the first through holes 33 to improve the safety of the space between the tabs 53.
As an illustration of the present embodiment, the protrusion 37 located at the side of the first through hole 33 may also be, but is not limited to, a rib.
As a schematic of this embodiment, the shape of the protrusion 37 located on the side of each first through hole 33 is respectively from the inner surface of the bus conductor insulating support to the top end direction of the protrusion 37, the width of each protrusion 37 is gradually narrower, the distance between the protrusions 37 on both sides of any first through hole 33 is gradually wider, and this arrangement is adopted to facilitate the insertion of each tab 53 on the edge into each first through hole 33.
As an illustration of the present embodiment, the bus conductor insulating brackets on the width end portion respectively include an upper edge 31, a lower edge 32 and a bracket main body 39 therebetween, screw holes four 38 along the Z-axis direction are respectively provided on the upper edge 31 and the lower edge 32 and respectively connected with the front and rear edges of the upper cover plate 21 and the lower cover plate 22, so that two bus conductor insulating brackets are screwed from the cover plate along the Z-axis direction and fastened between the upper cover plate 21 and the lower cover plate 22, respectively, to realize fastening of the bus conductor insulating brackets, and the first through hole 33 and the protrusion 37 are provided on the bracket main body 39.
As an illustration of the present embodiment, it is preferable but not selected to design the thicknesses of the upper edge 31 and the lower edge 32 of the bus conductor insulating bracket to be thicker than the thickness of the bracket main body 39.
As an illustration of the present embodiment, on the outer surface of the bus conductor insulating mount, the mount main body 39 is recessed inwardly with respect to the upper and lower edges 31, 32, and the outer surface of the mount main body 39 is a recessed platform recessed relatively to mount the bus conductor 61 thereon. Wherein the depth of the recess is preferably, but not limited to, such that when the bus conductor 61 is mounted on the recessed platform, the bus conductor 61 is just or almost flush with the upper edge 31 and the lower edge 32 of the bus conductor insulation support, so that the bus conductor 61 and the bus conductor insulation support are in an integrated structure.
When the bus conductor insulating bracket of the embodiment adopts a splicing structure, the bus conductor insulating bracket can be but is not limited to a structure that the splices 34 are spliced left and right along the horizontal direction, so that an upper edge 31, a lower edge 32 and a bracket main body 39 positioned between the upper edge and the lower edge are respectively arranged on each splice 34, and four screw holes 38 along the Z axis are respectively arranged on the upper edge 31 and the lower edge 32 of each splice 34 to fasten each splice 34 between the upper cover plate 21 and the lower cover plate 22, thereby ensuring the connection tightness.
The bus conductors 61 are mounted on the outer surface of the holder body 39, and the bus conductors 61 are snap-fitted at their upper and lower edges to the snap-fit portions 40 on the upper and lower edges 31 and 32, respectively, of the bus conductor insulating holder, as shown in the drawing.
And a bus conductor 61 made of a conductive material for connecting the tabs 53 connected thereto in series or in parallel or in series and parallel. The bus conductors 61 are respectively fixed on the outer surfaces of the bus conductor insulating supports, and the tabs 53 extending through the bus conductor insulating supports extend from through holes (referred to as second through holes) of the bus conductors 61 and are welded to the bus conductors 61, so that series-parallel connection of the cells 52 in the cell group is realized.
As an illustration of the present embodiment, the bus conductor 61 of the present embodiment may be a plurality of independent bodies, each body is independently mounted on the bus conductor insulating support, and each body is connected to the tab 53 of the body, so that the separated bodies are connected by the bus conductor 61 of other shapes to form the battery pack in a predetermined series-parallel relationship. The adoption of the separate independent individual structure is beneficial to improving the flexibility of installation and the application flexibility of parts.
It can be seen from the above that, by adopting the battery pack structure of the technical scheme of the present embodiment, each battery cell 52 is respectively and laterally erected on the cover plate, the gravity of each battery cell 52 is respectively acted on the lower cover plate 22 located at the bottom thereof, and is not acted on other battery cells 52, and the problem that the number of the battery cells 52 in the prior art is limited is broken through by adopting the technical scheme.
In addition, in this embodiment, the upper cover plate 21 and the lower cover plate 22 are respectively bent to the bending edge 23 on the surface of the end plate and the left end plate 11 and the right end plate 12 on both sides of the thickness of the electric core pack, the expansion force of the working process of the electric core pack is mainly concentrated on the middle part of each electric core 52, the expansion force direction is transmitted to the left end plate 11 and the right end plate 12 which are located at the left and right end parts along the thickness direction of the electric core 52, and further transmitted to the upper cover plate 21 and the lower cover plate 22 which are coated on the end surface of the left end plate 11 and the right end plate 12 through the bending edge 23, and the expansion force in the charging and discharging process of the electric core 52 is borne by the upper cover plate 21 and the lower cover plate 22.
Moreover, the heat generated during the operation of each battery cell 52 of the present embodiment can be directly transferred to both or at least one of the upper cover plate 21 and the lower cover plate 22 respectively at the two side surfaces of the two end portions in the width direction, so as to be dissipated to the outside, thereby avoiding the accumulation of heat. Compared with the battery pack structure in the prior art, the battery pack has higher heat dissipation efficiency.
In conclusion, by applying the structure of the embodiment in the lithium ion battery, on the basis of reducing the material cost and saving the material of the supporting parts of the battery pack, the energy density of the battery pack is improved, the heat dissipation performance of the battery is also improved, the limitation of the number of the battery cells 52 in the battery pack is greatly broken through, and the realization of the high-rate and high-capacity battery pack is facilitated.
As an illustration of the embodiment, a flame-retardant foam sheet 51 or a PC insulation sheet can be adhered between the upper cover and the electric core assembly to achieve good heat insulation and impact buffering functions. Squeeze into the heat conduction colloidal silica through the machine between lower cover and electric core group, the colloidal silica condenses between the front cover position of electric core 52 and between each electric core 52 and lower cover, has consolidated the connection between electric core 52 on the one hand, and on the other hand makes things convenient for the heat of each electric core 52 to conduct fast to apron 22 down, gives out through apron 22 down. In addition, at low temperature, external heat may be conducted to each of the battery cells 52 through the lower cover plate 22, thereby improving the environmental adaptability of the battery pack.
As the schematic of this embodiment, the utility model also provides a structure of apron, see the figure:
the upper cover plate 21 comprises a flat plate for covering the top of the electric core pack, two bent and downward folded edges 23 for tightly connecting the left end plate 11 and the right end plate 12 are respectively arranged at the left edge and the right edge of the flat plate, a U-shaped groove 26 which is concave downwards is formed at the front edge and the rear edge of the platform in a downward bending way, the opening of the U-shaped groove 26 is upward, when the installation, make the flat board of upper cover plate 21 cover at the top of electric core group, control two bent hem 23 fastening left end plate 11 on the thickness direction of electric core group, the right-hand member board 12 outside, the U-shaped recess 26 of preceding back edge is located outside the front and back edge of electric core group, make the U-shaped recess 26 of this upper cover plate 21 just form a screens with the front and back edge of electric core group, make the electric core group be located under the flat board of lower cover plate 22, it is spacing between the inside edge of the bent hem 23 of upper cover plate 21 and U-shaped recess 26 respectively all around, the location of upper cover plate 21 has been realized.
The lower cover plate 22 and the upper cover plate 21 form a mirror image relationship, specifically, the lower cover plate 22 comprises a flat plate for being padded at the bottom of the electric core group, two bent edges 23 which are bent upwards and are used for being tightly connected with the left end plate 11 and the right end plate 12 are respectively arranged at the left edge and the right edge of the flat plate, the front edge and the rear edge of the flat plate are bent upwards to form an inverted U-shaped groove 27 which is recessed downwards, the opening of the inverted U-shaped groove 27 faces downwards, when the flat plate of the lower cover plate 22 is padded at the bottom of the electric core group, the left bent edge and the right bent edge 23 are tightly fixed at the outer sides of the left end plate 11 and the right end plate 12 in the thickness direction of the electric core group, the inverted U-shaped grooves 27 at the front edge and the rear edge are positioned outside the front edge and the rear edge of the electric core group, the inverted U-shaped groove 27 of the lower cover plate 22 just forms a clamping group with the front edge and the rear edge of the electric core group, the electric core group is positioned on the flat plate of, the front, the back, the left and the right are respectively limited in the bending edge 23 and the inverted U-shaped groove 27 structure,
after the upper cover plate 21 and the lower cover plate 22 are installed, the U-shaped groove 26 of the upper cover plate 21 and the inverted U-shaped groove 27 of the lower cover plate 22 are respectively positioned outside the front edge and the rear edge of the electric core group to form symmetrical opposite structures, the bus conductor insulating bracket is installed between the opposite structures, the U-shaped groove 26 and the inverted U-shaped groove 27 are respectively provided with a hole part two 25 along the Z axis, and the flow conductor insulating bracket is fastened between the opposite U-shaped groove 26 and the inverted U-shaped groove 27 through the screw penetrating hole part two 25 and the screw holes four 38 on the upper edge 31 and the lower edge 32 of the bus conductor insulating bracket.
As an illustration of the present embodiment, an insulating protection plate 4 is further disposed on the front and rear end surfaces of the lithium ion battery of the present embodiment, and the insulating protection plate 4 covers the front and rear sections of the electric core assembly, covers the bus conductor insulating support, and covers the bus conductor 61, and provides an insulating protection for the circuit structure of the battery pack, so as to prevent moisture and dust from falling.
As an illustration of the present embodiment, the present embodiment further provides a structure of the insulation protection plate 4, wherein the upper edge 31 and the lower edge 32 of the insulation protection plate 4 are respectively formed with a bending edge 41 hooked up and down oppositely, the bending degree is such that the outermost edge of the bending edge 41 forms at least one vertical edge 42 on the Z-axis, the vertical edge 42 on the upper edge 31 of the insulation protection plate 4 is opposite to the groove body of the U-shaped groove 26 of the upper cover, the vertical edge 42 on the lower edge 32 of the insulation protection plate 4 is opposite to the groove body of the inverted U-shaped groove 27 of the lower cover, the insulation protection plate 4 is pushed, the vertical edge 42 on the upper edge 31 of the insulation protection plate 4 is made to slide into the groove body of the U-shaped groove 26 of the upper cover and slide along the groove body, meanwhile, the vertical edge 42 on the lower edge 32 is made to slide into the groove body of the inverted U-shaped groove 27 of the lower cover and slide along the groove body until the insulation protection plate 4 is pushed to a, the current conductor insulating holder and the bus conductor 61 are covered. Adopt the 4 structures of insulating protection shield of this embodiment, need not to adopt the lock that can realize insulating protection shield 4 and upper and lower lid such as screw to be connected, and as long as the installation, the dismantlement that can realize insulating protection shield 4 of roll-off slide in slide, need not any instrument, the dismouting is maintained convenient very much.
As an illustration of the present embodiment, the inner surfaces facing the core pack at the bent edges 41 of the upper edge 31 and the lower edge 32 of the insulation protection plate 4 are formed with a slope, and the slopes are respectively located at the inner surfaces of the bent corners of the insulation protection plate 4. Specifically, at the upper edge 31 of the insulating protection plate 4, the inclined plane intersects with the vertical plane of the insulating protection plate 4 and the horizontal plane of the upper edge 31 of the insulating protection plate 4 respectively to form an obtuse angle, so that the upward-bent groove body edge of the U-shaped groove 26 of the upper cover plate 21 is limited between the inclined plane and the vertical edge 42 of the insulating protection plate 4, so as to limit the connection relationship between the insulating protection plate 4 and the upper cover plate 21 and avoid sliding off due to vibration; similarly, at the lower edge 32 of the insulating protection plate 4, the inclined plane intersects with the vertical plane of the insulating protection plate 4 and the horizontal plane of the lower edge 32 of the insulating protection plate 4 respectively to form an obtuse angle, so that the downward-bending groove body edge of the inverted U-shaped groove 27 of the lower cover plate 22 is limited between the inclined plane and the vertical edge 42 of the insulating protection plate 4, so as to limit the connection relationship between the insulating protection plate 4 and the lower cover and avoid sliding due to vibration.
The above-described embodiments do not limit the scope of the present invention. Any modification, equivalent replacement, and improvement made within the spirit and principle of the above-described embodiments should be included in the protection scope of the technical solution.
Claims (29)
1. A lithium ion battery pack, comprising:
the battery core group comprises a plurality of lithium ion battery cells, wherein the battery cells are sequentially attached to each other face to face along the thickness direction of the battery cells, the thickness direction of the battery cells is the horizontal left and right direction, and two electrode lugs of each battery cell respectively extend out of two width end faces of each battery cell;
the left end plate and the right end plate respectively cover the opposite left end surface and the right end surface of the electric core group in the thickness direction, and the electric core group is clamped between the two end plates;
the upper cover plate and the lower cover plate are respectively covered on the top surface and the bottom surface of the electric core pack, bent edges bent downwards are respectively arranged at the left edge and the right edge of the upper cover plate and the lower cover plate, and the bent edges of the upper cover plate and the lower cover plate are respectively covered and fastened on the outer surfaces of the left end plate and the right end plate;
the two bus conductor insulating supports respectively cover the front end face and the rear end face of the electric core assembly perpendicular to the width direction, the upper edge and the lower edge of each bus conductor insulating support are respectively and fixedly connected with the front edge and the rear edge of the upper cover plate and the lower cover plate, a plurality of first through holes are respectively formed in each bus conductor insulating support, and each lug respectively extends out of each first through hole opposite to the lug;
and the bus conductors are used for connecting the lugs in series and parallel, are arranged on the outer surfaces of the bus conductor insulating supports, are respectively provided with a plurality of second through holes, are respectively opposite to the first through holes, and also respectively extend out of the second through holes and are welded on the bus conductors.
2. The lithium ion battery pack of claim 1,
and double-sided adhesive tapes are also adhered between the opposite surfaces of the battery cores.
3. The lithium ion battery pack of claim 1,
at least one flame-retardant foam sheet is arranged in the electric core group at intervals, and two surfaces of the flame-retardant foam sheet are respectively adhered to the electric cores on the two surfaces.
4. The lithium ion battery pack of claim 1,
and flame-retardant foam cotton sheets are respectively arranged among the left end plate, the right end plate and the electric core group.
5. The lithium ion battery pack of claim 1,
and a flame-retardant foam piece is also adhered between the upper cover plate and the electric core group.
6. The lithium ion battery pack of claim 1,
and heat-conducting silica gel is filled between the lower cover plate and the electric core group.
7. The lithium ion battery pack of claim 6,
the heat-conducting silica gel positioned at the bottom of the electric core group is fully distributed on the bottom end surfaces of the electric cores and is filled in gaps among the electric cores on the bottom end surfaces.
8. The lithium ion battery pack of claim 1,
the inner surface of the bus conductor insulating bracket facing the electric core group is also provided with a plurality of bulges, and at least one bulge is respectively arranged between any two adjacent first through holes at intervals.
9. The lithium ion battery pack of claim 8,
at least two bulges between any two adjacent first through holes are arranged in a straight line.
10. The lithium ion battery according to claim 8 or 9,
each protrusion is arranged from the inner surface of the bus conductor insulating support to the tail end direction of the protrusion:
the width of the protrusion is gradually narrowed down,
and the distance between the protrusions on two sides of any one first through hole is gradually widened from the tail end of the protrusion to the inner surface direction of the bus conductor insulating bracket.
11. The lithium ion battery pack of claim 1,
each of the bus conductor insulating supports includes: an upper edge, a lower edge, and a bracket body located between the upper edge and the lower edge,
the upper edge and the lower edge are respectively provided with a screw hole in the vertical direction, each bus conductor insulating bracket is fastened between the upper cover plate and the lower cover plate through the screw hole in a vertical penetrating way,
each first through hole and each bulge are respectively arranged on the support main body.
12. The lithium ion battery pack of claim 11,
the thickness of the upper edge and the lower edge is thicker than that of the bracket main body.
13. The lithium ion battery pack of claim 11,
the outer surface of the bracket main body is a concave platform which is concave relative to the upper edge and the lower edge, and the bus conductor is arranged on the concave platform.
14. The lithium ion battery pack of claim 13,
the outer surface of the bus conductor is flush with or lower than the upper edge and the lower edge.
15. The lithium ion battery pack of claim 11,
each bus conductor insulation bracket is respectively composed of a plurality of splicing pieces spliced left and right,
each of the splices includes the upper edge, the lower edge, and the bracket body, respectively.
16. The lithium ion battery pack of claim 1,
the front end surface and the rear end surface of the electric core group are respectively covered with an insulating protection plate,
the bus conductor insulating support and the bus conductor are covered on the inner side of the protection plate.
17. The lithium ion battery pack of claim 16,
the front edge and the rear edge of the lower cover plate are respectively provided with a U-shaped bent edge, and when the lower cover plate is padded at the bottom of the electric core group, the electric core group is limited between the U-shaped bent edges at the front edge and the rear edge of the lower cover plate;
the front edge and the rear edge of the upper cover plate are respectively an inverted U-shaped bent edge, and when the upper cover plate covers the top of the electric core group, the electric core group is limited between the inverted U-shaped bent edges at the front edge and the rear edge of the upper cover plate;
the bus conductor insulating support is respectively fastened between the U-shaped bent edge and the inverted U-shaped bent edge which are opposite up and down.
18. The lithium ion battery pack of claim 17,
screw holes with the axial direction being vertical direction are respectively arranged on the upper edge and the lower edge of the bus conductor insulating bracket,
the upper edge and the lower edge of the bus conductor insulating support are respectively fastened between the upper cover plate and the lower cover plate through screws penetrating through screw holes in the U-shaped groove body on the U-shaped bent edge of the upper cover plate and the inverted U-shaped groove body on the inverted U-shaped bent edge of the lower cover plate.
19. The lithium ion battery pack of claim 17,
the upper and lower edges of each insulation protection plate are respectively bent inwards, the bent tail ends are vertical edges,
the vertical edge at the upper edge of the insulation protection plate is limited in the U-shaped groove body of the upper cover plate, and the vertical edge at the lower edge is limited in the inverted U-shaped groove body of the lower cover plate.
20. The lithium ion battery pack of claim 1,
the left end plate and the right end plate are respectively rigid plastic end plates.
21. The lithium ion battery pack of claim 20,
the left end plate and the right end plate are respectively provided with a plurality of non-through hole parts.
22. The lithium ion battery pack of claim 21,
the opening end of each hole part is arranged on the outer surface of the left end plate and the outer surface of the right end plate.
23. The lithium ion battery pack of claim 21,
the axial direction of each hole part is respectively in the same direction as the thickness direction of the electric core group.
24. The lithium ion battery pack of claim 21,
and screw holes with the axial direction being the vertical direction are respectively arranged at the front edge and the rear edge of the left end plate and the right end plate.
25. The lithium ion battery pack of claim 21,
hole parts are respectively arranged at the front edge and the rear edge of the left end plate and the right end plate, and hexagonal nuts are embedded in the hole parts.
26. The lithium ion battery pack of claim 1,
the left end plate and the right end plate are respectively of an integrated forming structure.
27. The lithium ion battery pack of claim 1,
the upper cover plate and the lower cover plate are respectively heat-conducting metal plates.
28. The lithium ion battery pack of claim 27,
the upper cover plate and the lower cover plate are respectively a steel plate and an aluminum plate.
29. The lithium ion battery pack of claim 1,
the upper cover plate and the lower cover plate are respectively of an integrated forming structure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020503648.1U CN211605207U (en) | 2020-04-09 | 2020-04-09 | Lithium ion battery pack |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020503648.1U CN211605207U (en) | 2020-04-09 | 2020-04-09 | Lithium ion battery pack |
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| Publication Number | Publication Date |
|---|---|
| CN211605207U true CN211605207U (en) | 2020-09-29 |
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|---|---|---|---|
| CN202020503648.1U Expired - Fee Related CN211605207U (en) | 2020-04-09 | 2020-04-09 | Lithium ion battery pack |
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|---|---|
| CN (1) | CN211605207U (en) |
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2020
- 2020-04-09 CN CN202020503648.1U patent/CN211605207U/en not_active Expired - Fee Related
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