CN114709533A - Battery pack and battery device - Google Patents
Battery pack and battery device Download PDFInfo
- Publication number
- CN114709533A CN114709533A CN202210302091.9A CN202210302091A CN114709533A CN 114709533 A CN114709533 A CN 114709533A CN 202210302091 A CN202210302091 A CN 202210302091A CN 114709533 A CN114709533 A CN 114709533A
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- Prior art keywords
- battery
- battery pack
- end plate
- positioning protrusion
- positioning
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- 239000003292 glue Substances 0.000 claims abstract description 25
- 238000003780 insertion Methods 0.000 claims description 42
- 230000037431 insertion Effects 0.000 claims description 42
- 238000003466 welding Methods 0.000 abstract description 8
- 238000005516 engineering process Methods 0.000 abstract description 2
- 239000010410 layer Substances 0.000 description 12
- 238000000034 method Methods 0.000 description 12
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 6
- 239000000853 adhesive Substances 0.000 description 6
- 230000001070 adhesive effect Effects 0.000 description 6
- 239000000741 silica gel Substances 0.000 description 6
- 229910002027 silica gel Inorganic materials 0.000 description 6
- 238000002955 isolation Methods 0.000 description 5
- 238000005192 partition Methods 0.000 description 4
- 239000012790 adhesive layer Substances 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 230000001154 acute effect Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000001125 extrusion Methods 0.000 description 2
- 230000002349 favourable effect Effects 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 229920000742 Cotton Polymers 0.000 description 1
- 230000004308 accommodation Effects 0.000 description 1
- 230000006978 adaptation Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 239000006260 foam Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000011810 insulating material Substances 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 230000001012 protector Effects 0.000 description 1
- 125000006850 spacer group Chemical group 0.000 description 1
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Classifications
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/20—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
- H01M50/244—Secondary casings; Racks; Suspension devices; Carrying devices; Holders characterised by their mounting method
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/20—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
- H01M50/204—Racks, modules or packs for multiple batteries or multiple cells
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/20—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
- H01M50/289—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders characterised by spacing elements or positioning means within frames, racks or packs
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
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- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Battery Mounting, Suspending (AREA)
Abstract
The utility model relates to the technical field of batteries, and discloses a battery pack and a battery device, wherein the battery pack is inserted into a battery box body in a third direction and comprises a battery component and an end plate; the battery assembly comprises at least two single batteries which are sequentially arranged along a first direction; the end plate is folded along a first direction and is arranged on one side of the battery pack, at least one side face of the end plate is provided with a positioning protruding portion, the positioning protruding portion protrudes out of the end plate along a second direction, the positioning protruding portion can be abutted against the battery box body, and the first direction, the second direction and the third direction are perpendicular to each other. The glue layer between the battery pack and the battery box body is uniform, so that the bonding strength between the battery pack and the battery box body is enhanced; the welding between utmost point post and the electrically conductive row is comparatively easy, reduces the technology degree of difficulty, raises the efficiency.
Description
Technical Field
The present disclosure relates to the field of battery technologies, and in particular, to a battery pack and a battery device including the same.
Background
With the rapid development of modern industry, the problems of environmental pollution, energy shortage, resource exhaustion and the like are more and more prominent. In order to maintain the sustainable development of economy and protect the environment and energy supply of human living, zero discharge of batteries is the first choice as a new energy source.
However, after the battery pack is arranged in the battery box body at present, the glue layer between the battery pack and the battery box body is not uniform; moreover, the dislocation between the pole and the conductive bar on each single battery is large, so that the welding difficulty between the pole and the conductive bar is large.
It is to be noted that the information disclosed in the above background section is only for enhancement of understanding of the background of the present disclosure, and thus may include information that does not constitute prior art known to those of ordinary skill in the art.
Disclosure of Invention
An object of the present disclosure is to overcome the above-mentioned disadvantages of the prior art, and to provide a battery pack and a battery device including the same.
According to an aspect of the present disclosure, there is provided a battery pack, an insertion direction of the battery pack into a battery case being a third direction, the battery pack including:
the battery pack comprises at least two single batteries which are sequentially arranged along a first direction;
the battery pack comprises an end plate, wherein the end plate is arranged on one side of the battery pack in a stacking mode along a first direction, at least one side face of the end plate is provided with a positioning protruding portion, the positioning protruding portion protrudes out of the end plate along a second direction, the positioning protruding portion can be abutted against a battery box body, and the first direction, the second direction and the third direction are perpendicular to each other.
According to the battery pack, after the battery is assembled in the battery box body, the positioning protruding part is abutted against the battery box body, the position of the battery pack in the battery box body is fixed due to the support of the positioning protruding part, and the gap between the battery pack and the battery box body is uniform, so that the glue layer between the battery pack and the battery box body is uniform, and the bonding strength between the battery pack and the battery box body is enhanced; in addition, the position of each single battery in the battery box body is fixed, the dislocation between the pole column on each single battery and the conducting bar is small, the welding between the pole column and the conducting bar is easy, the process difficulty is reduced, and the efficiency is improved; moreover, the process of processing and forming the positioning protruding part on the end plate is simple.
According to another aspect of the present disclosure, there is provided a battery device including:
a battery pack that is any one of the battery packs described above;
and the battery box body is internally provided with the battery pack.
According to the battery device, after the battery is assembled in the battery box body, the positioning protruding part is abutted against the battery box body, and the battery pack is fixed in the position in the battery box body due to the support of the positioning protruding part, so that the safety problem caused by the fact that the battery pack shakes in the battery box body in the use process of the battery device is avoided; the gap between the battery pack and the battery box body is uniform, so that a glue layer between the battery pack and the battery box body is uniform, and the bonding strength between the battery pack and the battery box body is enhanced; in addition, the position of each single battery in the battery box body is fixed, dislocation between the pole column on each single battery and the conductive bar is small, welding between the pole column and the conductive bar is easy, the process difficulty is reduced, and the efficiency is improved.
It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the disclosure.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present disclosure and together with the description, serve to explain the principles of the disclosure. It is to be understood that the drawings in the following description are merely exemplary of the disclosure, and that other drawings may be derived from those drawings by one of ordinary skill in the art without the exercise of inventive faculty.
Fig. 1 is a schematic structural diagram of an exemplary embodiment of a battery pack according to the present disclosure.
Fig. 2 is a schematic view of the end plate of fig. 1.
Fig. 3 is a partially enlarged structural view of the first example embodiment of the end plate.
Fig. 4 is a partially enlarged structural view of a second example embodiment of an end plate.
Fig. 5 is a partially enlarged schematic view of a third exemplary embodiment of an end plate.
Fig. 6 is a partially enlarged structural view of a fourth example embodiment of the end plate.
Fig. 7 is a partially enlarged structural view of a fifth example embodiment of an end plate.
Fig. 8 is a partially enlarged structural view of a sixth example embodiment of an end plate.
Fig. 9 is a schematic structural view of a seventh exemplary embodiment of an end plate.
Fig. 10 is a schematic view of the two end plates in fig. 9 after being engaged.
Fig. 11 is a schematic structural diagram of an exemplary embodiment of a battery device according to the present disclosure.
Fig. 12 is a schematic cross-sectional structural view of an exemplary embodiment of a battery device according to the present disclosure.
Description of reference numerals:
1. a battery assembly; 11. a single battery;
2. an end plate; 21. a bottom surface; 22. a top surface; 23. a butting surface; 24. a side surface; 241. a first side surface; 242. a second side surface; 25. a positioning projection; 251. a first portion; 2511. a rectangular plate; 2512. a right angle sector plate; 252. a second portion; 2521. positioning the abutting surface; 25a, a first positioning projection; 25b, a second positioning projection; 261. a first groove; 262. a second groove;
3. a battery pack; 31. an insertion end face;
4. a battery case; 41. a side plate; 42. an isolation beam; 43. a bottom guard plate;
5. an insulating pad; 6. a gap; 7. a glue layer;
x, a first direction; y, a second direction; z, third direction.
Detailed Description
Example embodiments will now be described more fully with reference to the accompanying drawings. Example embodiments may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein; rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the concept of example embodiments to those skilled in the art. The same reference numerals in the drawings denote the same or similar structures, and thus their detailed description will be omitted. Furthermore, the drawings are merely schematic illustrations of the present disclosure and are not necessarily drawn to scale.
Although relative terms, such as "upper" and "lower," may be used herein to describe one element of an icon relative to another, such terms are used herein for convenience only, e.g., with reference to the orientation of the example illustrated in the drawings. It will be appreciated that if the device of the icon were turned upside down, the element described as "upper" would become the element "lower". When a structure is "on" another structure, it may mean that the structure is integrally formed with the other structure, or that the structure is "directly" disposed on the other structure, or that the structure is "indirectly" disposed on the other structure via another structure.
The terms "a," "an," "the," "said," and "at least one" are used to indicate the presence of one or more elements/components/parts/etc.; the terms "comprising" and "having" are intended to be inclusive and mean that there may be additional elements/components/etc. other than the listed elements/components/etc.; the terms "first," "second," and "third," etc. are used merely as labels, and are not limiting on the number of their objects.
In some exemplary embodiments, glue may be applied to the inner bottom wall and the inner side wall of the battery case 4, a part of the glue may be scraped to the inner bottom wall of the battery case 4 during the process of installing the battery pack 4 into the battery case 4, and after the battery pack 4 is installed in place, the glue on the inner bottom wall may be squeezed and overflow to between the battery pack 3 and the battery case 4 to finally form the glue layer 7; in some exemplary embodiments, only the inner bottom wall of the battery case 4 is coated with glue, and after the battery pack 4 is mounted in place, the glue on the inner bottom wall is squeezed and overflows between the battery pack 3 and the battery case 4 to form the glue layer 7.
Because the width of the accommodating space of the battery box body 4 is larger than the width of the battery pack 3, after the battery pack 3 is arranged in the battery box body 4, a gap 6 is formed between the battery pack 3 and the battery box body 4, and therefore, the position of the battery pack 3 in the battery box body 4 is not fixed, so that the gap 6 between the battery pack 3 and the battery box body 4 is not uniform, and a glue layer between the battery pack 3 and the battery box body 4 is not uniform; moreover, the misalignment between the terminal and the conductive bar on each single battery 11 is large, which results in a large welding difficulty between the terminal and the conductive bar.
The present exemplary embodiment provides a battery pack 3, as shown in fig. 1 to 8, the direction in which the battery pack 3 is inserted into a battery case 4 is a third direction Z, and the battery pack 3 may include a battery assembly 1 and an end plate 2; the battery assembly 1 may include at least two unit batteries 11, and the at least two unit batteries 11 are sequentially arranged along the first direction X; the end plate 2 is stacked on one side of the battery pack 1 along the first direction X, at least one side surface 24 of the end plate 2 is provided with a positioning protruding portion 25, the positioning protruding portion 25 protrudes out of the end plate 2 along the second direction Y, the positioning protruding portion 25 can be abutted against the battery box 4, and the first direction X, the second direction Y and the third direction Z are perpendicular to each other.
According to the battery pack 3, after the battery pack 3 is arranged in the battery box body 4, the positioning protruding part 25 is abutted against the battery box body 4, due to the support of the positioning protruding part 25, the position of the battery pack 3 in the battery box body 4 is fixed, and the gap 6 between the battery pack 3 and the battery box body 4 is uniform, so that a glue layer between the battery pack 3 and the battery box body 4 is uniform, and the bonding strength between the battery pack 3 and the battery box body 4 is enhanced; in addition, the position of each single battery 11 in the battery box body 4 is fixed, the dislocation between the pole column on each single battery 11 and the conductive bar is small, the welding between the pole column and the conductive bar is easy, the process difficulty is reduced, and the efficiency is improved; moreover, the process of forming the positioning protrusion 25 on the end plate 2 is simple.
In the present example embodiment, the battery pack 3 may include the battery assembly 1 and two end plates 2. The battery assembly 1 may include two unit batteries 11, and the unit batteries 11 may be provided as a rectangular parallelepiped. The two single batteries 11 are sequentially arranged in a first direction X, which is consistent with the width direction of the single batteries 11, that is, the two single batteries 11 are sequentially arranged in the width direction. Of course, in other example embodiments of the present disclosure, the number of the unit batteries 11 may be three, four, or more; the shape of the unit cells 11 is also not limited to the above description, and for example, the unit cells 11 may also be provided as a cube, a prism, a cylinder, or the like.
The second direction Y may be the same as the length direction of the single battery 11, and the third direction Z may be the same as the height direction of the single battery 11, so that the first direction X, the second direction Y, and the third direction Z are perpendicular to each other.
Two end plates 2 are stacked on two opposite sides of the battery assembly 1 along the first direction X, that is, the two end plates 2 are disposed on the outermost sides of the two unit cells 11, and the two end plates 2 sandwich the two unit cells 11. The end plate 2 may be provided in a rectangular plate shape, and the end plate 2 may include a bottom surface 21, a top surface 22, two abutment surfaces 23, and two side surfaces 24; the bottom surface 21 may be coplanar with the bottom surface 21 of the cell 11, and the top surface 22 may be coplanar with the top surface 22 of the cell 11; two abutting surfaces 23 are oppositely arranged, one abutting surface 23 is oppositely arranged with the single battery 11 and abuts against the single battery 11, and the two abutting surfaces 23 are vertical to the first direction X; the two side surfaces 24 are oppositely disposed and parallel to the first direction X.
The length of end plate 2 in second direction Y is greater than the length of battery cell 11 in second direction Y for 2 both ends salient in battery pack 1's both ends on second direction Y end plate 2, end plate 2 can protect battery pack 1, packs into the in-process of battery box 4 at group battery 3, avoids colliding with and causes the damage to battery pack 1. The height of the end plate 2 in the third direction Z may be equal to the height of the single battery 11 in the third direction Z, so as to avoid the end plate 2 from affecting the welding of the pole and the conductive bar of the single battery 11. Of course, in other example embodiments of the present disclosure, the end plate 2 may be provided in other shapes, for example, in a circular plate shape, an elliptical plate shape, or the like, according to the shape of the unit battery 11 or the shape of the battery case 4.
A buffer cushion can be arranged between two adjacent single batteries 11, and after one single battery 11 is collided, the buffer cushion can absorb impact force to avoid transmitting the impact force to the adjacent single batteries 11, so that chain reaction caused by collision is avoided; also can set up the blotter between battery cell 11 and end plate 2, receive the collision back at end plate 2, the blotter can absorb the impact force, avoids transmitting the impact force to adjacent battery cell 11 to avoid the chain reaction that the collision caused.
The buffer pad has certain elasticity, and the material of buffer pad can be for steeping cotton, silica gel etc.. In the case that the cushion pad is made of foam, the cushion pad can be bonded to the two unit cells 11 on the two sides by the bonding glue, and the cushion pad can be bonded to the unit cells 11 on the two sides and the end plate 2 by the bonding glue. Under the condition that the blotter is silica gel, can bond two battery cells 11 of both sides together through silica gel, bond battery cells 11 and end plate 2 together through silica gel for the silica gel is multiplexing to be the blotter, and silica gel plays the bonding effect promptly, plays the cushioning effect again.
The material of the end plate 2 may be an insulating material, and in this case, the end plate 2 may improve the insulating property between the battery pack 3 and the battery box. Of course, in other example embodiments of the present disclosure, the battery pack 3 may further include two side baffles, the two side baffles are disposed opposite to each other, and the two side baffles are connected with the two end plates 2 end to form a rectangular accommodating portion for accommodating the battery assembly 1.
In the present exemplary embodiment, the positioning projections 25 are provided on both of the opposite side surfaces 24 of the end plate 2, and the side surfaces 24 are side surfaces 24 parallel to the first direction X. The positioning protrusion 25 protrudes from the end plate 2 in the second direction Y, that is, the positioning protrusion 25 protrudes from the end plate 2 in the length direction of the unit cell 11. After the battery pack 3 is arranged in the battery box body 4, the positioning protruding part 25 is abutted against the battery box body 4, the position of the battery pack 3 in the battery box body 4 is fixed due to the support of the positioning protruding part 25, and the gap 6 between the battery pack 3 and the battery box body 4 is uniform, so that the glue layer between the battery pack 3 and the battery box body 4 is uniform, and the bonding strength between the battery pack 3 and the battery box body 4 is enhanced; in addition, the dislocation between the pole and the conductive bar on each single battery 11 is small, the welding between the pole and the conductive bar is easy, the process difficulty is reduced, and the efficiency is improved; moreover, the process of forming the positioning protrusion 25 on the end plate 2 is simple.
The battery pack 3 has an insertion end face 31, and the insertion end face 31 is one end face that is first inserted into the battery case 4 when the battery pack 3 is mounted in the battery case 4.
In the present exemplary embodiment, as shown with reference to fig. 2, the positioning protrusion 25 may be provided in a flat plate shape, that is, the thickness of the positioning protrusion 25 in the first direction X is substantially uniform, and the thickness of the positioning protrusion 25 in the first direction X is smaller than the thickness of the end plate 2 in the first direction X. Of course, in other example embodiments of the present disclosure, the thickness of the positioning protrusion 25 in the first direction X may also be non-uniform, for example, a structure that is thinner near the insertion end face 31 and thicker far from the insertion end face 31 may be provided; a structure may be provided in which the thickness is thicker near the insertion end face 31 and the thickness is thinner away from the insertion end face 31; the structure with thicker middle and thinner two ends can also be set.
Referring to fig. 2 to 8, the positioning protrusion 25 may include a first portion 251 and a second portion 252, the first portion 251 and the second portion 252 are sequentially arranged in the third direction Z and are connected to each other, a portion of the positioning protrusion 25 close to the insertion end surface 31 is the first portion 251, and a portion of the positioning protrusion 25 far from the insertion end surface 31 is the second portion 252; the second portion 252 may be configured in a rectangular plate 2511 shape, and the height of the first portion 251 in the second direction Y increases with the distance from the insertion end surface 31 in the third direction Z, for example, a chamfer may be provided at an edge of the positioning protrusion 25 close to the insertion end surface 31 and far from the end plate 2, and the chamfer may be a circular chamfer or an oblique chamfer. The round chamfer can be a complete round chamfer or a partial round chamfer; the bevel chamfer may be a full bevel chamfer or a partial bevel chamfer. With the arrangement, when the battery pack 3 is inserted into the battery box, the chamfer can provide guidance for the battery pack 3, so that the battery pack 3 can be conveniently inserted into the battery box body 4; moreover, after the battery pack 3 is inserted into the battery box 4, a larger accommodating space can be formed between the chamfer and the battery box 4, and the accommodating space can accommodate the adhesive glue, so that the adhesive strength between the battery pack 3 and the battery box 4 is enhanced.
In particular, as shown with reference to fig. 3, the first portion 251 may be provided in the form of a plate of right triangle, a right-angled face of which is coplanar with the side face 24 of the end plate 2, another right-angled face of which is coplanar with the side face 24 of the second portion 252, the inclined face of which forms the above-mentioned complete oblique chamfer. Of course, in other example embodiments of the present disclosure, as shown in fig. 4, the second portion 252 may be provided in a plate shape of a right trapezoid, and the inclined surface of the right trapezoid forms the partial oblique chamfer.
It should be noted that the inclination angle α of the oblique chamfer in fig. 3 and 4 is an acute angle smaller than 45 degrees, and in some other exemplary embodiments of the present disclosure, the inclination angle α of the oblique chamfer may be equal to 45 degrees, or may be an acute angle larger than 45 degrees. Of course, the smaller the inclination angle α of the oblique chamfer is, the more gradual the slope of the formed oblique chamfer is, and the more favorable the battery pack 3 is to be put into the box; but also more glue can be accommodated.
As shown in fig. 5, the first portion 251 may be provided in the shape of a right-angle fan, a right-angle surface of which is coplanar with the side surface 24 of the end plate 2, and another right-angle surface of which is coplanar with the side surface 24 of the second portion 252, and a circular arc surface of which forms the above-mentioned complete circular chamfer. Of course, in other example embodiments of the present disclosure, as shown with reference to fig. 6, the first portion 251 may include a rectangular plate 2511 and a right-angle sector plate 2512 connected to each other, the right-angle sector plate 2512 is located on a side of the rectangular plate 2511 away from the end plate 2, and the arc surface of the right-angle sector plate 2512 forms the above-mentioned partial round chamfer.
In addition, it should be noted that, in fig. 5 and fig. 6, the arc surface forming the rounded chamfer is a quarter arc, and as shown in fig. 7, in some other exemplary embodiments of the present disclosure, the arc surface forming the rounded chamfer may be smaller than the quarter arc, and the smaller the included angle β formed by the tangent of the rounded chamfer and the side surface 24 of the end plate 2 is, the more gradual the slope of the formed rounded chamfer is, the more favorable the battery pack 3 is put into the box; but also more glue can be accommodated.
Moreover, the surface of the second portion 252 away from the end plate 2 in fig. 3-7 is a positioning abutting surface 2521, and after the battery pack 3 is installed in the battery case 4, the positioning abutting surface 2521 abuts against the battery case 4, so that the area of the positioning abutting surface 2521 is large, the pressure on the battery case 4 can be reduced, and the damage to the battery case and finally the whole battery device caused by the excessive pressure can be avoided.
Referring to fig. 8, the positioning protrusion 25 may also be arranged in a wedge-shaped structure, that is, the positioning protrusion 25 is arranged in a plate shape of a right triangle, and a right angle face of the right triangle is coplanar with the side face 24 of the end plate 2; so that the height of the positioning projection 25 in the second direction Y increases with increasing distance from the insertion end surface 31 in the third direction Z. Moreover, the edge of the wedge-shaped structure, which is far away from the insertion end face and the end plate, can be provided with a chamfer, the chamfer can be a round chamfer or an oblique chamfer, and the chamfer can be arranged to avoid forming edges and corners, so that the damage to the battery box body 4 caused by the overlarge extrusion force of the edges and the battery box body 4 is avoided. In addition, in still other exemplary embodiments of the present disclosure, the inclined surface of the wedge structure may be provided as a curved surface, which may be a circular arc surface, an elliptical curved surface, a parabolic curved surface, or the like.
Therefore, the height of at least the first portion 251 of the positioning projection 25 in the second direction Y is increased with the distance from the insertion end face 31 in the third direction Z, facilitating the insertion of the battery pack 3 into the battery case 4; moreover, the adhesive at the bottom of the battery pack 3 overflows between the side of the positioning projection 25 close to the insertion end face 31 and the battery case 4, and the adhesive strength between the end plate 2 and the battery case 4 is improved, thereby improving the adhesive strength between the battery pack 3 and the battery case 4.
In the present example embodiment, the positioning protrusion 25 may be provided at the end portion of the end plate 2 close to the insertion end surface 31, that is, the distance between the side of the positioning protrusion 25 remote from the insertion end surface 31 and the insertion end surface 31 is greater than zero and equal to or less than half the height of the end plate 2, that is, the positioning protrusion 25 is provided in the range from zero to half the height of the end plate 2 from the insertion end surface 31; the width of the upper part of the end plate 2 is smaller than that of the insertion end, so that the situation that the friction of the side part is large and the battery pack 3 is not easily inserted into the battery box body 4 in the box entering process is avoided. Of course, in other example embodiments of the present disclosure, the positioning protrusion 25 may be provided in the middle of the end plate 2, or at an end of the end plate 2 remote from the insertion end face 31.
In addition, in other example embodiments of the present disclosure, the positioning protrusion 25 may be provided only at one side surface of the end plate 2.
In the present exemplary embodiment, the two oppositely disposed sides 24 of the end plate 2 are a first side 241 and a second side 242, and the first side 241 and the second side 242 are symmetrically disposed. The positioning protrusion 25 arranged on the first side surface 241 of the end plate 2 is a first positioning protrusion 25a, the positioning protrusion 25 arranged on the second side surface 242 of the end plate 2 is a second positioning protrusion 25b, and the first positioning protrusion 25a and the second positioning protrusion 25b are symmetrically arranged, that is, the first positioning protrusion 25a and the second positioning protrusion 25b have the same structure, so that when the battery pack 3 is put into a box, the battery pack 3 can be prevented from being inclined to cause difficulty in being put into the battery box 4, and the pressing forces of the battery pack 3 on the two sides of the battery box 4 are also the same, thereby preventing the battery box 4 from being damaged due to overlarge pressing force on one side, and finally damaging the whole battery device; on the other hand, the width of the gap between the two sides of the battery pack and the battery box body is the same, the thickness of the glue layer between the two sides of the battery pack and the battery box body is the same, and the bonding firmness is consistent; the specific structure has been described in detail above, and therefore, the detailed description thereof is omitted here.
In still other example embodiments of the present disclosure, referring to fig. 9, the two oppositely disposed sides 24 of the end plate 2 are a first side 241 and a second side 242, and the first side 241 and the second side 242 are symmetrically disposed. The positioning protrusion provided on the first side surface 241 of the end plate 2 is the first positioning protrusion 25a, the positioning protrusion provided on the second side surface 242 of the end plate 2 is the second positioning protrusion 25b, and the first positioning protrusion 25a and the second positioning protrusion 25b are offset from each other, and for example, the first positioning protrusion 25a may be closer to the insertion end surface 31 than the second positioning protrusion 25b, or the first positioning protrusion 25a may be farther from the insertion end surface 31 than the second positioning protrusion 25 b. As shown in fig. 10, when the distance between two adjacent cell stacks 3 is small, the positioning projections 25 on the end plates 2 of the two adjacent cell stacks 3 are displaced and do not interfere with each other.
Further, referring to fig. 9, a first groove 261 may be provided at the first side 241, and a second groove 262 may be provided at the second side 242. The first groove 261 may be offset from the second groove 262, for example, the first groove 261 may be closer to the insertion end surface 31 than the second groove 262, or the first groove 261 may be farther from the insertion end surface 31 than the second groove 262. Of course, the position of the first groove 261 needs to consider the first positioning protrusion 25a, that is, the first groove 261 may be closer to the insertion end surface 31, or the first positioning protrusion 25a may be closer to the insertion end surface 31; the position of the second recess 262 also needs to consider the second positioning protrusion 25b, i.e., the second recess 262 may be closer to the insertion end surface 31, or the second positioning protrusion 25b may be closer to the insertion end surface 31.
Further, referring to fig. 10, the cell stacks are arranged in at least two adjacent groups in the second direction Y, the first recess 261 is for accommodating the second positioning protrusion 25b on the end plate 2 of the adjacent cell stack, and the second recess 262 is for accommodating the first positioning protrusion 25a on the end plate 2 of the adjacent cell stack; therefore, the position of the first groove 261 needs to take into consideration the second positioning protrusion 25b, and the first groove 261 is disposed opposite to the second positioning protrusion 25b so that the second positioning protrusion 25b on the end plate 2 of the adjacent battery pack can be accommodated in the first groove 261; similarly, the position of the second recess 262 also needs to consider the first positioning protrusion 25a, and the second recess 262 is disposed opposite to the first positioning protrusion 25a, so that the first positioning protrusion 25a on the end plate 2 of the adjacent battery pack can be accommodated in the second recess 262.
The depth of the first groove 261 is less than or equal to the height of the second positioning protrusion 25b in the second direction Y, so as to avoid that the second positioning protrusion 25b cannot abut against the groove bottom wall of the first groove 261, which results in that the end plate 2 cannot be positioned in the second direction Y; the depth of the second groove 262 in the second direction Y is less than or equal to the height of the first positioning protrusion 25a, so as to avoid the first positioning protrusion 25a being unable to abut against the bottom wall of the second groove 262, which results in the end plate 2 being unable to be positioned in the second direction Y.
In the first direction X, the width of the first groove 261 is greater than or equal to the thickness of the second positioning protrusion 25b, and the width of the second groove 262 is greater than or equal to the thickness of the first positioning protrusion 25 a.
The structure of the first positioning protrusion 25a and the second positioning protrusion 25b may be any one of those described above, and therefore, the description thereof is omitted. The first positioning protrusion 25a and the second positioning protrusion 25b may have the same or different structures, and may be determined according to actual needs.
Also, the first positioning protrusion 25a may be provided in two or more, and similarly, the second positioning protrusion 25b may be provided in two or more.
In the case where the number of the first positioning protrusions 25a and the number of the second positioning protrusions 25b are the same, the first positioning protrusions 25a may be disposed opposite to the second positioning protrusions 25 b.
In the case where the number of the first positioning protrusions 25a and the number of the second positioning protrusions 25b are not the same, the same number of first positioning protrusions 25a may be disposed opposite to the second positioning protrusions 25b, and the redundant first positioning protrusions 25a or second positioning protrusions 25b may be separately disposed.
Of course, regardless of whether the number of the first positioning protrusions 25a and the number of the second positioning protrusions 25b are the same or different, the first positioning protrusions 25a and the second positioning protrusions 25b may be disposed in a staggered manner, for example, the second positioning protrusions 25b may be disposed between two adjacent first positioning protrusions 25a, or the first positioning protrusions 25a may be disposed between two adjacent second positioning protrusions 25b, such that the first positioning protrusions 25a and the second positioning protrusions 25b are disposed in a staggered manner.
Of course, the first groove 261 and the second groove 262 may be provided in two or more, and the rule of the first groove 261 and the second groove 262 is described in detail above, and therefore, the description thereof is omitted here.
A groove may be provided on one side surface of the end plate 2, and the groove may be a first groove 261 provided on the first side surface 241 or a second groove 262 provided on the second side surface 242, and the groove is provided opposite to the positioning protrusion 25. The battery packs 3 are arranged in at least two adjacent sets in the second direction Y, and the recesses are adapted to receive the positioning projections 25 of the adjacent end plates 2. The number of the grooves may be one or more than two, and may be determined according to the number of the positioning projections 25 to be accommodated.
In addition, in some other example embodiments of the present disclosure, the first positioning protrusion 25a and the second positioning protrusion 25b may not be the same, for example, in the case where the requirements of the gap 6 between the two sides of the battery pack 3 and the battery case 4 in the second direction Y are different, the height of the first positioning protrusion 25a in the second direction Y and the height of the second positioning protrusion 25b in the second direction Y may not be the same.
Based on the same inventive concept, the disclosed example embodiments provide a battery device, which may include a battery pack 3 and a battery case 4, as shown in fig. 11; the battery pack 3 is the battery pack 3 described in any one of the above, and the specific structure of the battery pack 3 has been described in detail above, and therefore, the details are not repeated herein; the battery case 4 has the battery pack 3 disposed therein.
In the present exemplary embodiment, the battery box 4 may include a bottom guard plate 43, a top plate (not shown in the figure) and four side plates 41, the bottom guard plate 43 and the top plate may be configured to be rectangular, the four side plates 41 are disposed around the bottom guard plate 43, the four side plates 41 are connected end to form a rectangular ring, the top plate is disposed on the other side of the four side plates 41, and the top plate is disposed opposite to the bottom guard plate 43. The bottom guard plate 43, the top plate and the four side plates 41 surround to form an accommodating space. An insertion opening is formed at one side of the installation top plate surrounded by the four side plates 41, namely the insertion opening is formed by removing the top plate; when the battery device is assembled, the bottom protector 43 and the four side plates 41 are assembled to form an insertion opening, and the insertion end face 31 of the battery pack 3 is inserted from the insertion opening, and then the top plate is attached.
Of course, in other example embodiments of the present disclosure, the bottom guard plate 43 and the top plate may be provided in a circular shape, an oval shape, a trapezoidal shape, etc., and the side plates 41 may be provided in one or more and form a circular shape, an oval shape, a trapezoidal shape, etc., around them, so that the battery case 4 is formed in a cylindrical shape, an oval cylindrical shape, a prismatic shape, etc. The battery box 4 may also have other shapes, which are not described herein.
In the present exemplary embodiment, the battery box 4 may further include a plurality of isolation beams 42, the plurality of isolation beams 42 may be all cross beams, the plurality of isolation beams 42 may also be all longitudinal beams, and the plurality of isolation beams 42 may further include partial cross beams and partial longitudinal beams. The extension direction of the cross beam and the extension direction of the longitudinal beam may intersect, for example, may be perpendicular. The plurality of partition beams 42 partition the accommodation space into a plurality of partitioned spaces, and the battery pack 3 is mounted in each partitioned space.
In the present exemplary embodiment, referring to fig. 12, the battery device further includes a glue layer 7, the glue layer 7 is disposed between the bottom wall of the battery case 4 and the battery pack 3, specifically, between the bottom protective plate 43 of the battery case 4 and the battery pack 3; due to the extrusion force of the battery pack 3 on the adhesive layer 7, part of the adhesive layer 7 overflows between the side wall of the battery box 4 and the battery pack 3, i.e., part of the adhesive layer 7 overflows between the side plate 41 of the battery box 4 and the battery assembly 1, the end plate 2, the positioning protrusion 25, and the like, so as to ensure the bonding firmness between the battery box 4 and the battery pack 3.
In the present exemplary embodiment, the battery device may further include an insulating pad 5. In the case where no cross member is provided, the insulating pad 5 is provided on the inner side wall of the side plate 41, that is, the insulating pad 5 is provided on the side wall of the side plate 41 near the accommodating space. In the case where the partition beam 42 is provided, the insulating mat 5 may be provided on the inner side wall of the side plate 41 and the side wall of the partition beam 42. And insulating pad 5 is located between battery pack 1 and battery box 4, and the length of insulating pad 5 in first direction X is the same basically with battery pack 1 in first direction X promptly, and the height of insulating pad 5 in third direction Z is the same basically with battery pack 1 in third direction Z's height, and insulating pad 5 can insulate and keep apart battery pack 1 and battery box 4, when avoiding battery cell 11 to leak electricity, the electric current switches on to battery box 4, causes the electric shock accident.
Because the end plate 2 is an insulating end plate 2, the insulating pad 5 is not arranged between the end plate 2 and the battery box body 4, and the gap 6 is arranged between the insulating pad 5 and the positioning protrusion part 25, so that when the battery pack 3 is inserted into the battery box body 4, the insulating pad 5 does not interfere with the positioning protrusion part 25, and the battery pack 3 is conveniently inserted into the battery box body 4; in addition, in the process of inserting the battery pack 3 into the battery box body 4, the insulating pad 5 cannot be scraped off, and the insulating effect between the battery component 1 and the battery box body 4 is ensured; furthermore, the gap 6 between the insulating spacer 5 and the positioning projection 25 can also contain an adhesive, which further improves the adhesion strength between the battery pack 3 and the battery case 4.
Other embodiments of the disclosure will be apparent to those skilled in the art from consideration of the specification and practice of the disclosure disclosed herein. This application is intended to cover any variations, uses, or adaptations of the disclosure following, in general, the principles of the disclosure and including such departures from the present disclosure as come within known or customary practice within the art to which the disclosure pertains. It is intended that the specification and examples be considered as exemplary only, with a true scope and spirit of the disclosure being indicated by the following claims.
Claims (15)
1. A battery pack, the battery pack being inserted into a battery case in a third orientation, the battery pack comprising:
the battery pack comprises at least two single batteries which are sequentially arranged along a first direction;
the battery pack comprises an end plate, wherein the end plate is stacked on one side of the battery pack in the first direction, at least one side face of the end plate is provided with a positioning protruding part, the positioning protruding part protrudes out of the end plate in the second direction, the positioning protruding part can be abutted against a battery box body, and the first direction, the second direction and the third direction are perpendicular to each other.
2. The battery pack according to claim 1, wherein the battery pack has an insertion end surface, a portion of the positioning protrusion near the insertion end surface is a first portion, and a height of at least the first portion in the second direction increases with increasing distance from the insertion end surface in the third direction.
3. The battery pack of claim 2, wherein an edge of the positioning protrusion near the insertion end face and away from the end plate is provided with a chamfer.
4. The battery pack of claim 2, wherein the locating tabs are provided as a wedge-shaped structure.
5. The battery pack according to claim 2, wherein a distance between a side of the positioning protrusion, which is away from the insertion end surface, and the insertion end surface is greater than zero and equal to or less than half of a height of the end plate.
6. The battery pack of claim 1, wherein the length of the end plate in the second direction is greater than the length of the unit cells in the second direction.
7. The battery pack according to claim 1, wherein the positioning protrusion provided at the first side surface of the end plate is a first positioning protrusion, the positioning protrusion provided at the second side surface of the end plate is a second positioning protrusion, the first positioning protrusion is symmetrically provided with the second positioning protrusion, and the first side surface is disposed opposite to the second side surface.
8. The battery pack according to claim 1, wherein a groove is provided on at least one side surface of the end plate, the groove being provided opposite to the positioning projection, the battery pack being provided in at least two groups adjacent in the second direction, the groove being for receiving the positioning projection of the adjacent end plate.
9. The battery pack according to claim 1, wherein the positioning protrusion provided on the first side surface of the end plate is a first positioning protrusion, the positioning protrusion provided on the second side surface of the end plate is a second positioning protrusion, the first side surface is disposed opposite to the second side surface, and the first positioning protrusion and the second positioning protrusion are disposed in a staggered manner.
10. The battery pack according to claim 9, wherein a first groove is provided on the first side surface, a second groove is provided on the second side surface, and the first groove and the second groove are arranged in a staggered manner; the battery pack is arranged into at least two groups which are adjacent in the second direction, the first groove is used for accommodating the second positioning protrusion adjacent to the end plate, and the second groove is used for accommodating the first positioning protrusion adjacent to the end plate.
11. The battery pack of claim 10, wherein the depth of the first recess in the second direction is less than or equal to the height of the second positioning tab and the depth of the second recess in the second direction is less than or equal to the height of the first positioning tab.
12. A battery device, comprising:
a battery pack according to any one of claims 1 to 11;
and the battery box body is internally provided with the battery pack.
13. The battery device according to claim 12, further comprising:
and the insulating pad is arranged on the side wall of the battery box body and is positioned between the battery component and the battery box body.
14. The battery device according to claim 13, wherein a gap is provided between the positioning protrusion and the insulating mat.
15. The battery device of claim 12, further comprising:
the glue film is arranged between the bottom wall of the battery box body and the battery pack, and part of the glue film overflows to the side wall of the battery box body and between the battery packs.
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| CN202210302091.9A CN114709533B (en) | 2022-03-24 | 2022-03-24 | Battery pack and battery device |
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| CN202210302091.9A CN114709533B (en) | 2022-03-24 | 2022-03-24 | Battery pack and battery device |
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Address after: No.1 Jiangdong Avenue, Jintan District, Changzhou City, Jiangsu Province Patentee after: China Innovation Aviation Technology Group Co.,Ltd. Country or region after: China Address before: No.1 Jiangdong Avenue, Jintan District, Changzhou City, Jiangsu Province Patentee before: Zhongchuangxin Aviation Technology Co.,Ltd. Country or region before: China |