CN116053680A - Battery module and electric equipment - Google Patents
Battery module and electric equipment Download PDFInfo
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- CN116053680A CN116053680A CN202310112862.2A CN202310112862A CN116053680A CN 116053680 A CN116053680 A CN 116053680A CN 202310112862 A CN202310112862 A CN 202310112862A CN 116053680 A CN116053680 A CN 116053680A
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- 230000037431 insertion Effects 0.000 claims description 34
- 230000003014 reinforcing effect Effects 0.000 claims description 32
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- 239000004576 sand Substances 0.000 description 6
- 230000002349 favourable effect Effects 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 229910000851 Alloy steel Inorganic materials 0.000 description 2
- 229910000975 Carbon steel Inorganic materials 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 2
- 239000010962 carbon steel Substances 0.000 description 2
- 230000017525 heat dissipation Effects 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
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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
- H01M50/233—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders characterised by physical properties of casings or racks, e.g. dimensions
- H01M50/236—Hardness
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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
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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
- H01M50/258—Modular batteries; Casings provided with means for assembling
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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
- H01M50/262—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders with fastening means, e.g. locks
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- 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 invention discloses a battery module and electric equipment, wherein the battery module comprises a box body, a battery cell group, two supporting bases and two end plates, the battery cell group is arranged in the box body, the battery cell group comprises a plurality of battery cells arranged along a first direction, and the first direction is the length direction of the battery cell group; the two support bases are arranged at intervals along the first direction and are positioned at two sides of the battery cell group; the two end plates are respectively arranged on the two supporting bases. By installing the end plate on the supporting base, the assembly mode of the end plate is simplified, the assembly time of the end plate is shortened, and the assembly efficiency of the battery module is improved.
Description
Technical Field
The invention relates to the technical field of batteries, in particular to a battery module and electric equipment.
Background
In the related art, the battery module includes a plurality of cells connected in series/parallel to form a cell group. The periphery of the battery cell group is provided with a side plate and an end plate, and the end plate is generally connected to the side plate through a fastening bolt.
However, the mounting manner of the end plate is complicated, and a long assembly time is required, resulting in a reduction in the assembly efficiency of the battery module.
Disclosure of Invention
The present invention aims to solve at least one of the technical problems existing in the prior art. Therefore, the invention provides the battery module, when the battery module is assembled, an assembler can directly insert the end plate on the support base, the operation is convenient and simple, the assembling step is not needed to be completed by other tools, and the assembling efficiency of the battery module is improved.
The invention also aims to provide electric equipment with the battery module.
The battery module according to the embodiment of the first aspect of the invention comprises a box body, a battery cell group, two supporting bases and two end plates.
The battery cell group is arranged in the box body and comprises a plurality of battery cells arranged along a first direction, and the first direction is the length direction of the battery cell group; the two support bases are arranged at intervals along the first direction and are positioned at two sides of the battery cell group; the two end plates are respectively arranged on the supporting base.
According to the embodiment of the invention, the end plate is arranged on the supporting base, so that the assembly mode of the end plate is simplified, the assembly time of the end plate is shortened, and the assembly efficiency of the battery module is improved.
According to some embodiments of the invention, at least one insertion portion is protruding on a surface of the support base facing the end plate, at least one insertion hole portion allowing the insertion of the insertion portion is formed on the surface of the end plate facing the support base, and the insertion portion is in insertion fit with the insertion hole portion to achieve fixed connection of the support base and the end plate. So set up, inlay and insert cooperation mode simple structure, it is convenient to make.
According to some embodiments of the invention, the support base comprises a base body integrally formed with the plug portion. The base body and the plug-in part are integrally formed, so that the manufacturing process of the plug-in part can be simplified, the processing time of the support base is shortened, and the processing cost of the support base is reduced.
According to some embodiments of the invention, the support base is provided with two plugging portions, and the two plugging portions are symmetrically distributed about a middle position of the support base in a second direction, wherein the second direction is a width direction of the battery cell group. The middle area that the electric core was kept away from to grafting portion in the Y direction sets up, can avoid grafting portion to receive big effort impact for grafting portion atress is less, guarantees the rigidity (straightness that hangs down) and the stability of grafting portion, is favorable to later stage to battery module maintenance when, and battery module dismantles conveniently.
According to some embodiments of the invention, the plug portion is a cylinder and the receptacle portion is a blind hole matching the cylinder. So set up, grafting portion atress is more even, is favorable to guaranteeing the rigidity and the stability of grafting portion, avoids grafting portion stress concentration.
According to some embodiments of the invention, the height of the plug is H 1 The height of the end plate is H 2 ，1/2H 2 ≤H 1 ≤H 2 . The connection strength of the plug-in connection part and the jack part is ensured, and the connection stability between the end plate and the supporting base is further improved.
According to some embodiments of the invention, the end plate includes a body portion and a plurality of reinforcing portions, the plurality of reinforcing portions being disposed around the body portion in a sequential end-to-end connection, the reinforcing portion having a thickness greater than a thickness of the body portion, the receptacle portion being located on the reinforcing portion. By the arrangement, the influence on the rigidity and stability of the material in the surrounding area of the jack due to the formation of the jack is avoided, and the structural stability of the end plate is improved.
According to some embodiments of the invention, the surface of the end plate facing the supporting base is provided with convex strips in a protruding mode, the surface of the supporting base facing the end plate is recessed to form limit grooves matched with the convex strips, and the convex strips are inserted into the limit grooves to achieve fixed connection between the supporting base and the end plate. So set up, on the one hand, protruding sand grip of establishing can improve the structural strength of end plate, and on the other hand, protruding sand grip of establishing can improve the joint strength between end plate and the support base, and in addition, the cooperation of sand grip and spacing groove can further carry out spacingly to the end plate in the Y direction.
According to some embodiments of the invention, the rib is located at a middle position of the end plate in the second direction.
According to some embodiments of the invention, the thickness of the reinforcement is 1mm-10mm, and the ratio of the length of the ridge to the length of the end plate in the second direction is b, which is 10% or less and 50% or less. The arrangement ensures that the connection strength between the end plate and the support base is improved as much as possible under the action of the reinforcing end plate; the overall weight of the end plate is reduced as much as possible while ensuring the strength of connection between the reinforcing end plate and the support base.
According to some embodiments of the invention, the support base is recessed away from the cell group along the first direction to form the notch-shaped limit groove. The arrangement is like this, when making inlaying the cooperation of inserting between end plate and the support base, avoid leading to the assembly precision improvement between ground end plate and the support base because of spacing groove and reinforcing part are crossed spacingly.
An electric device according to an embodiment of the second aspect of the present invention includes the battery module in the above embodiment.
According to the electric equipment provided by the embodiment of the invention, the battery module is adopted, so that the assembly efficiency of the electric equipment is improved.
Drawings
Fig. 1 is a schematic view of a structure of a battery module according to an embodiment of the present invention;
fig. 2 is an internal structure view of a battery module according to an embodiment of the present invention;
FIG. 3 is an exploded schematic view of an internal structure according to an embodiment of the present invention;
fig. 4 is a front view of the internal structure of a battery module according to an embodiment of the present invention;
fig. 5 is a bottom view of the internal structure of the battery module according to the embodiment of the present invention;
FIG. 6 is a schematic view of the structure of a support base according to an embodiment of the present invention;
fig. 7 is a schematic structural view of an end plate according to an embodiment of the present invention.
Reference numerals:
a box body 10,
A supporting base 30, a plug-in part 31, a limit groove 32, a base body 33,
An insulating base 50, a tie 60, and a connecting base plate 70.
Detailed Description
Embodiments of the present invention are described in detail below, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to like or similar elements or elements having like or similar functions throughout. The embodiments described below by referring to the drawings are illustrative only and are not to be construed as limiting the invention.
The following disclosure provides many different embodiments, or examples, for implementing different structures of the invention. In order to simplify the present disclosure, components and arrangements of specific examples are described below. They are, of course, merely examples and are not intended to limit the invention. Furthermore, the present invention may repeat reference numerals and/or letters in the various examples. This repetition is for the purpose of simplicity and clarity and does not in itself dictate a relationship between the various embodiments and/or configurations discussed. In addition, the present invention provides examples of various specific processes and materials, but one of ordinary skill in the art will recognize the applicability of other processes and/or the use of other materials.
The battery module and the electric device according to the embodiment of the invention are described below with reference to the accompanying drawings.
As shown in fig. 1 to 7, the battery module according to the embodiment of the first aspect of the present invention includes a case 10, a battery cell group 20, two support bases 30, and two end plates 40. The battery cell group 20 is disposed in the case 10, and the battery cell group 20 includes a plurality of battery cells 21 disposed along a first direction, where the first direction is a length direction of the battery cell group 20. The two support bases 30 are spaced apart along the first direction and located at two sides of the battery cell group 20, and the two end plates 40 are respectively mounted to the two support bases 30.
Specifically, in the embodiment of the present invention, the first direction is the X direction in fig. 1-3, that is, the length direction of the battery cell group 20, and the second direction is the Y direction in fig. 1-3, that is, the width direction of the battery cell group 20.
The cell group 20 includes a plurality of cells 21 arranged in the X direction, and 8 cells 21 arranged in the X direction constitute the cell group 20 as shown in fig. 2 or 3. In the X direction, the two support bases 30 are arranged at intervals, the battery cell group 20 is located between the two support bases 30, and the two support bases 30 sandwich the battery cell group 20, so that the battery cell group 20 can be restrained in the X direction, and the two support bases 30 are fixed to the battery cell group 20.
The two end plates 40 are mounted to the two support bases 30, respectively. For example, the end plate 40 and the support base 30 may be in an insert fit, the end plate 40 and the support base 30 may be in a snap fit, or other suitable connection manner between the end plate 40 and the support base 30 may be provided, and the connection manner between the end plate 40 and the support base 30 is not particularly limited in this embodiment.
During battery module assembly, the two support bases 30 clamp the battery cell group 20, and an assembler needs to complete assembly of the end plate 40 and then assemble the box body 10. For the assembly of the end plate 40, an assembler can directly mount (insert) the end plate 40 on the support base 30, which is convenient and simple to operate, and does not need to use other tools to complete the assembly step. In the related art, however, the end plate 40 is fastened to the case 10 by bolts, the assembly of the end plate 40 is required to be completed by means of a wrench, and the assembly of a plurality of bolts takes a longer assembly time, resulting in a reduction in assembly efficiency.
Therefore, according to the embodiment of the present invention, the assembly of the end plate 40 is simplified by mounting the end plate 40 on the support base 30, the assembly time of the end plate 40 is shortened, and the assembly efficiency of the battery module is improved.
In some embodiments of the present invention, the battery cells 21 include electrode ends 211 and bottom ends 212 disposed up and down, the support bases 30 are disposed near the bottom ends 212, the distance between the two support bases 30 is equal to the length of the battery cell group 20, and the support bases 30 are abutted against the battery cells 21 at the outermost side of the battery cell group 20.
Specifically, as shown in fig. 3 and 4, the battery module further includes an insulating base 50 in the form of a sheet, a tie 60, and a connection base plate 70. Two support bases 30 and insulating base 50 are located on same horizontal plane, and one support base 30, insulating base 50, another support base 30 set up along X in proper order, and electric core group 20 is placed on insulating base 50. The distance between the two support bases 30 is equal to the length of the battery cell group 20, and as shown in fig. 4, the left support base 30 abuts against the leftmost battery cell 21 in the battery cell group 20, and the right support base 30 abuts against the rightmost battery cell 21 in the battery cell group 20. So realized, two support bases 30 sandwich the cell group 20.
Two ties 60 tie each cell 21 together, i.e., cell stack 20, with one tie 60 near the electrode end 211 of the cell 21 and the other tie 60 near the bottom end 212 of the cell 21.
The connection base plate 70 connects the two support bases 30 such that the two support bases 30 are connected as a unit, facilitating assembly of the case 10.
In some embodiments of the present invention, at least one insertion portion 31 is protruded on a surface of the support base 30 facing the end plate 40, and at least one insertion hole portion 421 allowing the insertion portion 31 to be inserted is formed on a surface of the end plate 40 facing the support base 30. The plugging portion 31 is in plugging fit with the inserting hole portion 421 to achieve the fixed connection between the support base 30 and the end plate 40. So set up, inlay and insert cooperation mode simple structure, it is convenient to make.
Specifically, as shown in fig. 3, 6 and 7, the surface of the support base 30 facing the end plate 40 is provided with a plug portion 31, the end plate 40 is provided with a jack portion 421 adapted to the plug portion 31, and the plug portion 31 is inserted into the jack portion 421, so that the end plate 40 is connected to the support base 30. The plugging portion 31 may be a protrusion, and correspondingly, the insertion hole portion 421 is a groove; the plug portion 31 may be a first tooth, and correspondingly, the insertion hole portion 421 may be a second tooth engaged with the first tooth; the plug-in portion 31 and the insertion hole portion 421 may have other suitable shapes, and the shape of the plug-in portion 31 and the insertion hole portion 421 is not particularly limited in this embodiment.
It should be noted that, in some embodiments, the end plate 40 may be provided with a jack portion 421, and the support base 30 may be provided with a plug portion 31 adapted to the jack portion 421.
In some embodiments of the present invention, as shown in fig. 3, the supporting base 30 includes a base body 33, where the surface of the base body 33 facing the end plate 40 is protruded with a plug portion 31, and the base body 33 and the plug portion 31 are integrally formed, so that the manufacturing process of the plug portion 31 can be simplified, the processing time of the supporting base 30 can be shortened, and the processing cost of the supporting base 30 can be reduced.
Of course, it is understood that the base body 33 and the plug portion 31 may be separately provided, for example, the plug portion 31 is welded on the base body 33, or the plug portion 31 is screwed with the base body 33, or the plug portion 31 is inserted into the base body 33, and the connection manner between the base body 33 and the plug portion 31 is not particularly limited in the embodiment of the present invention.
In some embodiments of the present invention, two plugging portions 31 are disposed on the support base 30, and the two plugging portions 31 are symmetrically distributed about a middle position of the support base 30 in a second direction, where the second direction is a width direction of the battery cell group 20.
Specifically, as shown in fig. 3, the support base 30 includes a base body 33, and two insertion portions 31 disposed at intervals are protruded on a surface of the base body 33 facing the end plate 40. The area in the middle of the two plug-in parts 31 is opposite to the middle area of the battery cell 21, and the two plug-in parts 31 are symmetrically arranged about the middle area of the battery cell 21.
When the battery module expands, the battery module bulges from the middle of the battery cell 21 to the periphery, the force in the middle of the battery cell 21 is maximum, and the acting force applied to the middle area of the end plate 40 is maximum. Based on this, the middle part region that grafting portion 31 kept away from electric core 21 in the Y direction sets up, can avoid grafting portion 31 to receive the impact of big effort for grafting portion 31 atress is less, guarantees the rigidity (perpendicularity) and the stability of grafting portion 31, is favorable to later stage to battery module maintenance when, and battery module dismantles conveniently.
In some embodiments of the present invention, the ratio of the spacing between the two mating portions 31 to the width of the cell stack 20 in the second direction has a value of a, 2/3.ltoreq.a.ltoreq.1.
Specifically, as shown in fig. 6, the length direction of the end plate 30 is the same as the width direction of the cell group 20. The two plugging portions 31 are located at both ends of the end plate 30, respectively, that is, the distance between the two plugging portions 31 is approximately the same as the width of the cell stack 20. The arrangement is convenient to process.
Alternatively, the distance between the two plug-in portions 31 is approximately 2/3 of the width of the cell group 20. This arrangement is most advantageous in ensuring the rigidity (perpendicularity) and stability of the socket portion 31.
In some embodiments of the present invention, the plugging portion 31 is a cylinder, the insertion hole 421 is a blind hole matching with the cylinder, and the height of the plugging portion 31 is greater than or equal to half of the height of the end plate 40 and less than or equal to the height of the end plate 40.
It should be noted that, as shown in fig. 6, the plugging portion 31 may be a cylinder, a quadrangular prism, a hexagonal prism, or other suitable regular polygonal prism.
Preferably, the plugging portion 31 is a cylinder, so that the stress of the plugging portion 31 is more uniform, which is beneficial to ensuring the rigidity and stability of the plugging portion 31 and avoiding the stress concentration of the plugging portion 31.
In addition, as can be seen from fig. 6 and 7, the height of the insertion portion 31 is H 1 The end plate 40 has a height H 2 ，1/2H 2 ≤H 1 ≤H 2 Thus, the connection strength between the plug portion 31 and the insertion hole portion 421 is ensured, and the connection stability between the end plate 40 and the support base 30 is improved.
It should be noted that, the plugging portion 31 may be a cylinder with an equal diameter, for example, as shown in fig. 6, so as to facilitate processing; alternatively, the insertion portion 31 may be a stepped cylinder.
In some embodiments of the present invention, support base 30 and plug 31 are made of low alloy steel, carbon steel, or other suitable rigid materials. The end plate 40 is made of aluminum alloy or aluminum material, so that the overall weight of the end plate 40 is reduced, and the overall weight of the battery module is further reduced, thereby being beneficial to the lightweight design of the battery module.
Of course, it will be appreciated that the end plate 40, support base 30 and plug portion 31 are all made of low alloy steel, carbon steel, or other suitable rigid material.
In some embodiments of the present invention, the end plate 40 includes a body portion 41 and a plurality of reinforcing portions 42, the plurality of reinforcing portions 42 being disposed around the body portion 41 in turn, the reinforcing portions 42 having a thickness greater than that of the body portion 41, and the insertion hole portion 421 being located on the reinforcing portions 42.
Specifically, as shown in fig. 7, the end plate 40 includes a body portion 41 and a reinforcing portion 42, the body portion 41 is rectangular, the reinforcing portion 42 includes a reinforcing portion 42a, a reinforcing portion 42b, a reinforcing portion 42c, and a reinforcing portion 42d, and the reinforcing portion 42a, the reinforcing portion 42b, the reinforcing portion 42c, and the reinforcing portion 42d are connected end to end in this order and surround the body portion 41. The reinforcing portions 42a and 42c are provided along the height direction of the end plate 40, and the reinforcing portions 42b and 42d are provided along the length direction of the end plate 40. The through hole-shaped insertion hole portions 421 are formed in the reinforcing portions 42a and 42c, and thus the structure stability of the end plate 40 is improved by avoiding the influence of the formation of the insertion hole portions 421 on the rigidity and stability of the material in the surrounding area of the insertion hole portions 421.
Further, a circular ring 43 and a cross 44 are provided in the middle of the surface of the body 41 facing away from the battery cell 21, and the circular ring 43 and the cross 44 are arranged at the same geometric center. Since the battery module bulges from the middle of the battery cell 21 to the periphery when expanding, the force in the middle of the battery cell 21 is maximum, and the arrangement helps to improve the structural strength of the end plate 40.
Further, a plurality of heat dissipation holes 411 penetrating the body part 41 are arranged in an array on the body part 41, contributing to heat dissipation of the battery module.
In some embodiments of the present invention, the surface of the end plate 40 facing the support base 30 is convexly provided with a protruding strip 422, the surface of the support base 30 facing the end plate 40 is recessed to form a limit groove 32 adapted to the protruding strip 422, and the protruding strip 422 is inserted into the limit groove 32 to realize the fixed connection between the support base 30 and the end plate 40.
Specifically, as shown in fig. 7, the surface of the end plate 40 facing the support base 30 is provided with protruding strips 422, and the protruding strips 422 and the insertion hole 421 are located on the reinforcing portion 42 d. The protruding strips 422 are strip-shaped, and the protruding strips 422 face the middle area of the battery cell 21. The surface of the support base 30 facing the end plate 40 is recessed to form a limit groove 32 matched with the raised line 422, as shown in fig. 6, the limit groove 32 is in limit fit with the raised line 422. So set up, on the one hand, protruding the sand grip 422 and can improve the structural strength of end plate 40, on the other hand, protruding the sand grip 422 and can improve the joint strength between end plate 40 and the support base 30, in addition, the cooperation of sand grip 422 and spacing groove 32 can further carry out spacingly to end plate 40 in the Y direction.
Note that, in addition to the protrusion 422 being located at the middle position of the end plate 40 in the second direction, in some embodiments, the protrusion 422 may be located at one end of the end plate 40.
In some embodiments of the present invention, as shown in FIG. 7, the thickness of the raised strips 422 is 1mm to 10mm, and the ratio of the length L1 of the raised strips 422 to the length L2 of the end plate 40 in the second direction is 10% b.ltoreq.b.ltoreq.50%.
It will be appreciated that the thickness of the raised strips 422 may be 1mm, and the thickness of the raised strips 422 may be 10mm, or between the two, so as to improve the connection strength between the end plate 40 and the support base 30 as much as possible under the effect of ensuring the reinforcing end plate 40. The length L1 of the protruding strip 422 may be 10% of the length L2 of the end plate 40, and the length L1 of the protruding strip 422 may be 50% of the length L2 of the end plate 40, so that the length of the protruding strip 422 is set to reduce the overall weight of the end plate 40 as much as possible while ensuring the connection strength between the reinforcing end plate 40 and the support base 30.
In some embodiments of the present invention, the support base 30 is recessed away from the cell stack 20 in a first direction to form a notch-like limiting groove 32. By the arrangement, when the end plate 40 is in embedded fit with the support base 30, improvement of assembly precision between the ground end plate 40 and the support base 30 caused by over-limit of the limit groove 32 and the raised line 422 is avoided.
In some embodiments of the present invention, the battery module includes at least two battery cell groups 20 arranged in parallel along the second direction, one battery cell group 20 corresponds to two support bases 30, and two support bases 30 located on the same side are integrally formed.
Specifically, as shown in fig. 3, the upper cell set 20 corresponds to two support bases 30, and the lower cell set 20 corresponds to two support bases 30. The two support bases 30 on the left side are integrally formed, and the two support bases 30 on the right side are integrally formed. So set up, on the one hand, simplify the processing of supporting base 30, reduce the processing cost of supporting base 30, on the other hand shortens battery module's assembly time, improves battery module's assembly efficiency.
According to a second aspect of the invention, an electric device comprises the battery module in the embodiment.
In the scheme of the application, the structure of the electric equipment is not limited. For example, the electric equipment can be a mobile device such as a vehicle, a ship, a small aircraft and the like, and comprises a power source, wherein the power source comprises the battery module. The electric energy provided by the battery module provides driving force for electric equipment. The mobile device can be pure electric device, namely the driving force of electric equipment is electric energy, and the power source only comprises a battery module. The mobile equipment can also be hybrid power equipment, and the power source comprises a battery module, an engine and other power equipment. In some embodiments, the electric device is a new energy vehicle, and the new energy vehicle may be a pure electric vehicle, a hybrid electric vehicle, an extended range vehicle, an electric tricycle, a two-wheel electric vehicle, or the like.
According to the electric equipment provided by the embodiment of the invention, the battery module is adopted, so that the assembly efficiency of the electric equipment is improved.
In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "axial", "radial", "circumferential", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings are merely for convenience in describing the present invention and to simplify the description, and do not indicate or imply that the device or element being referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the present invention.
In the present invention, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; the device can be mechanically connected, electrically connected and communicated; can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the two elements. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art according to the specific circumstances.
In the present invention, unless expressly stated or limited otherwise, a first feature "up" or "down" a second feature may be the first and second features in direct contact, or the first and second features in indirect contact via an intervening medium. Moreover, a first feature being "above," "over" and "on" a second feature may be a first feature being directly above or obliquely above the second feature, or simply indicating that the first feature is level higher than the second feature. The first feature being "under", "below" and "beneath" the second feature may be the first feature being directly under or obliquely below the second feature, or simply indicating that the first feature is less level than the second feature.
In the description of the present specification, a description referring to terms "one embodiment," "some embodiments," "examples," "specific examples," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present invention. In this specification, schematic representations of the above terms are not necessarily directed to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, the different embodiments or examples described in this specification and the features of the different embodiments or examples may be combined and combined by those skilled in the art without contradiction.
While embodiments of the present invention have been shown and described, it will be understood by those of ordinary skill in the art that: many changes, modifications, substitutions and variations may be made to the embodiments without departing from the spirit and principles of the invention, the scope of which is defined by the claims and their equivalents.
Claims (13)
1. A battery module, comprising:
a case (10);
the battery cell group (20), the battery cell group (20) is arranged in the box body (10), the battery cell group (20) comprises a plurality of battery cells (21) arranged along a first direction, and the first direction is the length direction of the battery cell group (20);
two support bases (30), wherein the two support bases (30) are arranged at intervals along the first direction and are positioned at two sides of the battery cell group (20);
two end plates (40), the two end plates (40) are respectively mounted to the two support bases (30).
2. The battery module according to claim 1, wherein at least one insertion portion (31) is provided on a surface of the support base (30) facing the end plate (40) in a protruding manner, at least one insertion hole portion (421) allowing the insertion portion (31) to be inserted is formed on a surface of the end plate (40) facing the support base (30), and the insertion portion (31) and the insertion hole portion (421) are fitted in an inserted manner to achieve a fixed connection of the support base (30) and the end plate (40).
3. The battery module according to claim 2, wherein the support base (30) includes a base body (33), the base body (33) being integrally formed with the plug portion (31).
4. The battery module according to claim 2, wherein the support base (30) is provided with two plugging portions (31), and the two plugging portions (31) are symmetrically distributed with respect to a middle position of the support base (30) in a second direction, the second direction being a width direction of the battery cell group (20).
5. The battery module according to claim 4, wherein a ratio of a spacing between the two plug-in portions (31) to a width of the cell group (20) in the second direction is a, 2/3.ltoreq.a.ltoreq.1.
6. The battery module according to claim 2, wherein the insertion portion (31) is a cylinder; the insertion hole part (421) is a blind hole matched with the cylinder.
7. The battery module according to claim 2, wherein the height of the insertion portion (31) is H 1 The height of the end plate (40) is H 2 ，1/2H 2 ≤H 1 ≤H 2 。
8. The battery module according to claim 2, wherein the end plate (40) includes a body portion (41) and a plurality of reinforcing portions (42), the plurality of reinforcing portions (42) being disposed around the body portion (41) in turn, the reinforcing portions (42) having a thickness greater than that of the body portion (41), the insertion hole portion (421) being located on the reinforcing portion (42).
9. The battery module according to claim 4, wherein a protruding strip (422) is protruding towards the surface of the end plate (40) facing the support base (30), a limiting groove (32) adapted to the protruding strip (422) is recessed towards the surface of the end plate (40) of the support base (30), and the protruding strip (422) is inserted into the limiting groove (32) to realize the fixed connection of the support base (30) and the end plate (40).
10. The battery module according to claim 9, wherein the protrusion (422) is located at a middle position of the end plate (40) in the second direction.
11. The battery module according to claim 9, wherein the thickness of the protruding strips (422) is 1mm to 10mm;
and the ratio of the length of the raised line (422) to the length of the end plate (40) along the second direction is b, and b is more than or equal to 10% and less than or equal to 50%.
12. The battery module according to claim 9, wherein the support base (30) is recessed away from the cell group (20) in the first direction to form the notch-shaped limit groove (32).
13. A powered device comprising a battery module according to any one of claims 1-12.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310112862.2A CN116053680A (en) | 2023-02-14 | 2023-02-14 | Battery module and electric equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310112862.2A CN116053680A (en) | 2023-02-14 | 2023-02-14 | Battery module and electric equipment |
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| CN116053680A true CN116053680A (en) | 2023-05-02 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202310112862.2A Pending CN116053680A (en) | 2023-02-14 | 2023-02-14 | Battery module and electric equipment |
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