CN220138385U - Battery side plate and battery - Google Patents
Battery side plate and battery Download PDFInfo
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- CN220138385U CN220138385U CN202321668010.3U CN202321668010U CN220138385U CN 220138385 U CN220138385 U CN 220138385U CN 202321668010 U CN202321668010 U CN 202321668010U CN 220138385 U CN220138385 U CN 220138385U
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- plate body
- proof valve
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- 230000008093 supporting effect Effects 0.000 claims description 29
- 238000007599 discharging Methods 0.000 claims description 4
- 238000005474 detonation Methods 0.000 claims description 3
- 239000011324 bead Substances 0.000 claims 2
- 238000009423 ventilation Methods 0.000 description 24
- 230000009286 beneficial effect Effects 0.000 description 13
- 238000009826 distribution Methods 0.000 description 7
- 238000004880 explosion Methods 0.000 description 6
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 description 5
- 238000005520 cutting process Methods 0.000 description 5
- 230000000694 effects Effects 0.000 description 5
- 229910001416 lithium ion Inorganic materials 0.000 description 5
- 238000012545 processing Methods 0.000 description 5
- 238000001746 injection moulding Methods 0.000 description 4
- UQMRAFJOBWOFNS-UHFFFAOYSA-N butyl 2-(2,4-dichlorophenoxy)acetate Chemical compound CCCCOC(=O)COC1=CC=C(Cl)C=C1Cl UQMRAFJOBWOFNS-UHFFFAOYSA-N 0.000 description 3
- 238000013461 design Methods 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 239000000243 solution Substances 0.000 description 3
- 238000009825 accumulation Methods 0.000 description 2
- 238000004891 communication Methods 0.000 description 2
- 239000000306 component Substances 0.000 description 2
- 230000002349 favourable effect Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- FKNQFGJONOIPTF-UHFFFAOYSA-N Sodium cation Chemical compound [Na+] FKNQFGJONOIPTF-UHFFFAOYSA-N 0.000 description 1
- 230000002159 abnormal effect Effects 0.000 description 1
- 239000002390 adhesive tape Substances 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- 230000002146 bilateral effect Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000008358 core component Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000004146 energy storage Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000012943 hotmelt Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 210000001503 joint Anatomy 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
- 229910001415 sodium ion Inorganic materials 0.000 description 1
- 238000005728 strengthening Methods 0.000 description 1
Classifications
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
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- Gas Exhaust Devices For Batteries (AREA)
Abstract
The utility model relates to the technical field of batteries, and discloses a battery side plate and a battery, wherein the battery side plate is arranged between a pole group and an explosion-proof valve and comprises a side plate body and a vent hole, and the area of the side plate body is S; the vent hole is arranged on the side plate body, and the opening area of the vent hole is S 1 Wherein 5% < S 1 S is less than 50%. The battery comprises a pole group, a shell, an explosion-proof valve and a battery side plate, wherein the pole group is arranged in a containing cavity of the shell; the explosion-proof valve is arranged on the side part of the shell; the battery side plate is arranged on the pole groupAnd the explosion-proof valve. According to the utility model, the vent holes formed in the battery side plates are used as the electrode group air passages, so that the rapid discharge of gas in the electrode group is facilitated, and the phenomenon of thermal runaway of the electrode group caused by air passage blockage is avoided. In addition, the ratio of the open area of the vent hole to the area of the side plate body is less than 50%, so that the problems of low structural strength and easy damage of the battery side plate caused by overlarge open area of the vent hole can be effectively avoided.
Description
Technical Field
The utility model relates to the technical field of batteries, in particular to a battery side plate and a battery.
Background
With the increasing maturity of lithium ion battery technology, the lithium ion battery is widely applied to the electric automobile and the energy storage field as a power battery, and the requirements on the usability and the safety of the lithium ion battery are increasing. When abnormal conditions such as short circuit, overcharge and overdischarge occur in the use process of the lithium ion battery, chemical reaction occurs among various materials in the battery, a large amount of heat is generated, thermal runaway of the battery is caused, a large amount of high-temperature gas is generated in the battery, the pressure in the battery is increased sharply, and the battery is deformed or even explodes.
In order to prevent the explosion of the battery caused by the accumulation of gas in the battery, a person skilled in the art will usually set an explosion-proof valve on the housing of the battery, and when the internal pressure of the battery is too high, the explosion-proof valve is opened to burst, so that the gas in the electrode group is discharged to release the pressure, thereby preventing the explosion of the battery and ensuring the personal and property safety. For some longer batteries, the explosion-proof valve is arranged at the side part of the shell of the battery, and a battery side plate is arranged between the electrode group and the explosion-proof valve to protect the electrode group, wherein the battery side plate is a core component for ensuring thermal runaway.
However, the existing battery side plate has a single structure, can only play a role in supporting and protecting, has little effect on improving the thermal runaway in the electrode group, is unfavorable for rapidly discharging gas in the electrode group, and is easy to cause the problem of the thermal runaway in the electrode group caused by air passage blockage.
Disclosure of Invention
In view of the above, the utility model provides a battery side plate and a battery, which are used for solving the problems that the battery side plate in the prior art has a single structure, can only play a supporting and protecting role, hardly plays a role in improving the thermal runaway in the electrode group, is unfavorable for rapidly discharging gas in the electrode group and is easy to cause the thermal runaway of the electrode group caused by air passage blockage.
In a first aspect, the present utility model provides a battery side plate, which is disposed between a pole group and an explosion-proof valve, the battery side plate including a side plate body and a vent hole, the side plate body having an area S; the vent hole is formed in the side plate body, and the opening area of the vent hole is S 1 Wherein 5% < S 1 /S＜50％。
The beneficial effects are that: the vent holes formed in the battery side plates are used as the air passages of the pole groups, so that the gas in the pole groups can be discharged rapidly, and the phenomenon that the heat of the pole groups is out of control due to the blockage of the air passages is avoided. In addition, the open area of the vent hole in the embodiment is limited in the above size range, so that the problems of low structural strength and easy damage of the battery side plate caused by overlarge open area of the vent hole can be effectively avoided. Meanwhile, the problem that the thermal runaway of the electrode group is easy to occur due to insufficient exhaust channels in the battery because the small open area of the vent holes cannot play a substantial role in improving the thermal runaway of the electrode group can be avoided.
In an alternative embodiment, a plurality of the vent holes are formed in the side plate body at intervals along the length direction of the side plate body.
The beneficial effects are that: through a plurality of air vents of seting up on the curb plate body along the length direction of curb plate body interval, can improve curb plate air current flow distribution for the inside air flue of whole battery distributes more evenly, thereby can be further prevented taking place the phenomenon of utmost point group thermal runaway because of the air flue jam.
In an alternative embodiment, the side plate body includes two strip edges which are oppositely arranged, and a plurality of concave parts are respectively arranged on the edges of the strip edges at intervals.
The beneficial effects are that: the concave part arranged can reduce the cross-sectional area S of the battery side plate while not affecting the normal supporting and protecting functions of the battery side plate, thereby improving the ratio of the vent hole, namely the opening of the vent holeArea S 1 And the area S of the side plate body, thereby providing sufficient air passage space and structural safety protection for the battery.
In an alternative embodiment, the concave parts of the two strip edges of the side plate body are arranged oppositely, and the side plate body comprises a narrowing region between the two opposite concave parts and an invariable region with invariable width at two sides of the narrowing region.
The beneficial effects are that: through the interior concave part that sets up at curb plate body bilateral symmetry, improve the regular aesthetic property of battery curb plate greatly, also make things convenient for the arrangement of the different air vent of size simultaneously, through the alternative arrangement of narrowing district and invariable district in addition, interior concave part can also increase the area of exhaust passage, provides sufficient air flue space and structure safety protection for the battery.
In an alternative embodiment, the vent comprises a first vent disposed in the narrowed region and a second vent disposed in the constant region, the first vent being smaller than the second vent.
The beneficial effects are that: through the first air vent of the less size that sets up in the zone of narrowing, the great second air vent of size that sets up in the invariable district, realize with the first air vent of different sizes and second air vent set up alternately on the curb plate body, not only can avoid setting up the not good problem of structural strength of a plurality of great air vents of size messenger battery curb plate in succession, but also can avoid setting up the less air vent of a plurality of sizes in succession and make trompil quantity many, intensive, processing is difficult, the difficult quick exhaust problem of gas.
In an alternative embodiment, a side of the side plate body facing away from the pole group is provided with a supporting projection; the support protrusions comprise a plurality of support protrusions which are arranged on two sides of the side plate body at intervals along the length direction of the side plate body.
The beneficial effects are that: the supporting protrusions can be abutted on the inner wall of the shell after the battery is assembled, so that the supporting effect is achieved, an exhaust channel is formed in a gap between the two supporting protrusions, the rapid exhaust of gas inside the battery is facilitated, and the problems that the side plate of the battery is tightly attached to the inner wall of the shell and the airflow circulation is not smooth are solved.
In an alternative embodiment, the supporting protrusions are bar-shaped ribs, and the top surfaces of the bar-shaped ribs are arc-shaped abutting surfaces protruding in a direction away from the pole group.
The beneficial effects are that: the bump structure is formed through the arc-shaped butt joint surface, so that the battery side plate is in point contact with the shell, the joint area is reduced, the clearance space between the two supporting protrusions is larger, and gas circulation is facilitated.
In an alternative embodiment, the supporting protrusions are disposed on two long edges of the side plate body located at two sides of the second ventilation hole.
The beneficial effects are that: through setting up the supporting bulge in the both sides of the bigger second vent of trompil size, play the effect of strengthening rib, can improve the structural strength of second vent department.
In an alternative embodiment, the first vent hole and the second vent hole are each bar-shaped holes.
In an alternative embodiment, the vent hole includes an explosion-proof valve escape hole provided corresponding to the explosion-proof valve; setting the area of the detonation zone of the explosion-proof valve as S 2 The area of the avoidance hole of the explosion-proof valve is S 3 0.8S 2 ＜S 3 ＜1.2S 2 。
The beneficial effects are that: the explosion-proof valve dodges the hole through adopting above-mentioned size design, can effectively guarantee that explosion-proof valve can normally explode, avoids simultaneously that explosion-proof valve dodges the hole and offers the too big structural strength who influences the battery curb plate of area.
In a second aspect, the present utility model further provides a battery, including a pole group, a housing, an explosion-proof valve, and a battery side plate according to any of the foregoing embodiments, where the housing has a receiving cavity therein, and the pole group is disposed in the receiving cavity; an explosion-proof valve is installed at the side of the housing, and is adapted to be opened at a preset pressure to allow the gas in the accommodating chamber to be discharged; a battery side plate is disposed between the pole group and the explosion-proof valve.
In an alternative embodiment, the battery side plate includes oppositely disposed first and second sides, wherein: the first side surface is adhered and fixed on the side wall of the pole group, and a plurality of supporting protrusions are arranged on two strip edges of the second side surface at intervals; the support protrusions are adapted to be supported against the inner wall of the housing to form an exhaust channel between two adjacent support protrusions through which an air flow can circulate.
The beneficial effects are that: the exhaust channel formed by the clearance between the two supporting bulges can rapidly exhaust the gas in the power supply, so that the problems that the side plate of the battery is clung to the inner wall of the shell and the air flow is not smooth are prevented.
Drawings
In order to more clearly illustrate the embodiments of the present utility model or the technical solutions in the prior art, the drawings that are needed in the description of the embodiments or the prior art will be briefly described, and it is obvious that the drawings in the description below are some embodiments of the present utility model, and other drawings can be obtained according to the drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic view of an explosion-proof valve, a pole set and a battery side plate according to an embodiment of the present utility model;
FIG. 2 is an enlarged view at A of FIG. 1;
FIG. 3 is a schematic view of a battery side plate according to an embodiment of the present utility model;
FIG. 4 is a top view of the battery side plate of FIG. 3;
FIG. 5 is a side view of the battery side plate of FIG. 3;
fig. 6 is a schematic view of a battery side plate according to another embodiment of the present utility model;
FIG. 7 is a top view of the battery side plate of FIG. 6;
FIG. 8 is a cross-sectional view of the battery side plate of FIG. 7 in the B-B direction;
FIG. 9 is a top view of a battery in an embodiment of the utility model;
FIG. 10 is a cross-sectional view taken along the direction C-C in FIG. 9;
fig. 11 is a schematic diagram showing the assembly of a housing of a battery and an explosion-proof valve according to an embodiment of the present utility model.
Reference numerals illustrate:
100. a battery;
10. a pole group;
20. an explosion-proof valve;
30. a battery side plate; 301. a vent hole; 3011. a first vent hole; 3012. a second vent hole; 3013. an explosion-proof valve avoiding hole; 302. an inner concave portion; 303. a supporting protrusion;
40. a housing;
50. a first cover plate;
60. and a second cover plate.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the embodiments of the present utility model more apparent, the technical solutions of the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model, and it is apparent that the described embodiments are some embodiments of the present utility model, but not all embodiments of the present utility model. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.
In the description of the present utility model, it should be noted that the positional or positional relationship indicated by the terms such as "inner", "upper", "outer", "lower", etc. are based on the positional or positional relationship shown in the drawings, are merely for convenience of describing the present utility model and simplifying the description, and do not indicate or imply that the apparatus or element in question must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the present utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present utility model, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; may be in mechanical communication or in electrical communication; the two components can be directly connected or indirectly connected through an intermediate medium, or can be communicated inside the two components, or can be communicated wirelessly or by wires. The specific meaning of the above terms in the present utility model will be understood in specific cases by those of ordinary skill in the art.
In order to prevent the explosion of the battery caused by the accumulation of gas in the battery, a person skilled in the art will usually set an explosion-proof valve on the housing of the battery, and when the internal pressure of the battery is too high, the explosion-proof valve is opened to burst, so that the gas in the electrode group is discharged to release the pressure, thereby preventing the explosion of the battery and ensuring the personal and property safety.
For some longer batteries, the explosion-proof valve is arranged at the side part of the shell of the battery, and a battery side plate is arranged between the electrode group and the explosion-proof valve to protect the electrode group. However, the existing battery side plate has a single structure, can only play a role in supporting and protecting, has little effect on improving the thermal runaway in the electrode group, is unfavorable for rapidly discharging gas in the electrode group, and is easy to cause the problem of the thermal runaway in the electrode group caused by air passage blockage.
In the related art, the vent holes are formed in the battery side plate to solve the problems, however, because the battery side plate is thinner, if the vent holes are formed in an excessively large area, the structural strength of the battery side plate is poor, and the battery side plate is easy to damage; if the opening area of the vent hole is too small, the vent hole does not have enough vent passages, so that the vent hole hardly plays a role in improving the thermal runaway in the electrode group, and the vent hole hardly plays a role in preventing the thermal runaway in the electrode group. In addition, most of the battery side plates in the related art adopt PP material die-cutting pieces, however, because the die-cutting pieces can only be used for processing the battery side plates with consistent overall thickness, and the die-cutting pieces with 0.2-0.3 mm can only be used for processing the battery side plates with low requirements on battery air passages, the die-cutting pieces are not suitable for processing and manufacturing some batteries with high requirements on the thickness, shape and structure of the battery side plates.
An embodiment of the present utility model is described below with reference to fig. 1 to 11.
According to the implementation of the utility modelFor example, in one aspect, the present utility model provides a battery side plate 30, the battery side plate 30 is disposed between a pole group 10 and an explosion-proof valve 20, the battery side plate 30 includes a side plate body and a vent 301, and the area of the side plate body is S; the vent 301 is provided on the side plate body, and the opening area of the vent 301 is S 1 Wherein 5% < S 1 /S＜50％。
In the above embodiment, the vent holes 301 formed in the battery side plate 30 serve as the electrode group air passages, which is more beneficial for rapid gas discharge inside the electrode group, so as to avoid thermal runaway of the electrode group 10 due to air passage blockage. In addition, the open area of the vent 301 in this embodiment is limited to the above size range, so that the problems of low structural strength and easy damage of the battery side plate 30 caused by the overlarge open area of the vent 301 can be effectively avoided. Meanwhile, the small open area of the vent 301 can be avoided, which plays no substantial role in improving the thermal runaway in the electrode assembly 10, so that there is not enough vent passage in the battery, and the thermal runaway problem of the electrode assembly 10 is easy to occur.
The open area S of the vent 301 1 The area S of the side plate body is the total area of all the ventilation holes 301 contained in the outer contour line of the side plate body, that is, the area of the ventilation holes 301 is a part of the area of the side plate body.
Preferably, in this embodiment, 30% < S 1 S is less than 50%. Through adopting above-mentioned size design, when taking into account battery curb plate 30 structural strength, furthest increases the open area of air vent 301, and the open area of air vent 301 is great relatively, and this is favorable to reducing the exhaust resistance, more makes things convenient for the discharge of the inside gas of utmost point group to the effectual phenomenon of taking place utmost point group 10 thermal runaway because of the air flue jam is avoided.
In addition, in the present embodiment, the ratio of the opening area of the vent 301 to the area of the side plate body is limited to be less than 50%, which can improve the thermal runaway inside the pole group 10 and the structural strength of the battery side plate 30, and can reduce the processing difficulty of the battery side plate 30.
In some embodiments, a plurality of vent holes 301 are provided on the side plate body at intervals along the length direction of the side plate body.
In the above embodiment, by providing the plurality of ventilation holes 301 on the side plate body at intervals along the length direction of the side plate body, the flow distribution of the side plate air flow can be improved, so that the distribution of the air passages inside the whole battery is more uniform, and the occurrence of the thermal runaway phenomenon of the electrode group 10 due to the air passage blockage can be further prevented.
In some embodiments, the plurality of vent holes 301 are different in size. Through the vent holes 301 with different sizes, not only can good exhaust effect be considered, but also the structural strength of the whole battery side plate 30 can be ensured.
It should be noted that, in this embodiment, the plurality of ventilation holes 301 may be arranged in any shape and arrangement according to the requirement of the electrode group air passage, which is not limited in this embodiment. And the distribution of the ventilation holes 301 is not limited to the arrangement and shape change.
Preferably, in the present embodiment, the large-aperture ventilation holes 301 and the small-aperture ventilation holes 301 are alternately arranged. Through the design of establishing, when guaranteeing vent 301 open area is sufficient, more be favorable to improving the structural strength of battery curb plate 30.
In some embodiments, the side plate body includes two opposite long edges, and a plurality of concave portions 302 are respectively disposed on edges of the long edges at intervals.
In the above embodiment, the concave portion 302 is provided to reduce the cross-sectional area S of the battery side plate 30 while not affecting the normal supporting and protecting functions of the battery side plate 30, so that the ratio of the vent holes 301, that is, the opening area S of the vent holes 301, can be increased 1 The recess 302 also increases the area of the exhaust channel to provide more plentiful air passage space for the battery, as compared to the area S of the side plate body.
In the above embodiment, the concave portion 302 is a groove structure formed by recessing a part of the edge of the strip. A larger vent passage is formed inside the battery by the provision of the recess 302.
In some embodiments, the recesses 302 of the two elongated sides of the side panel body are disposed opposite each other, and the side panel body includes a narrowed region between the opposite recesses 302 and an invariable region of constant width on either side of the narrowed region.
In the above embodiment, through the concave portions 302 symmetrically arranged at two sides of the side plate body, the regular aesthetic property of the battery side plate 30 is greatly improved, meanwhile, the arrangement of the vent holes 301 with different sizes is also facilitated, and the uniform stability of the overall structural strength of the battery side plate 30 is more favorably ensured through the alternate arrangement of the narrowing regions and the unchanged regions.
In addition, in the present embodiment, the material cost can be reduced by providing the concave portions 302 on both sides of the battery side plate 30.
In some embodiments, the vent 301 includes a first vent 3011 disposed in the narrowed region and a second vent 3012 disposed in the constant region, the first vent 3011 being smaller than the second vent 3012.
In the above embodiment, through the first ventilation holes 3011 with smaller sizes arranged in the narrowing region and the second ventilation holes 3012 with larger sizes arranged in the invariable region, the first ventilation holes 3011 and the second ventilation holes 3012 with different sizes are alternately arranged on the side plate body, so that the problem that the structural strength of the battery side plate 30 is poor due to the fact that a plurality of ventilation holes 301 with larger sizes are continuously arranged can be avoided, and the problem that the number of holes is large, dense, difficult to process and difficult to rapidly discharge gas due to the fact that a plurality of ventilation holes 301 with smaller sizes are continuously arranged can be avoided.
In some specific embodiments, the first vent 3011 and the second vent 3012 are each a bar-shaped hole or a waist-shaped hole that is open along the length direction of the battery side plate 30.
In this embodiment, as shown in fig. 3 and 4, the narrowing region may be provided with the first ventilation hole 3011 or may not be provided with holes. The first ventilation holes 3011 and the second ventilation holes 3012 may be provided with one second ventilation hole 3012 for each first ventilation hole 3011, and of course, one second ventilation hole 3012 may be provided for each two first ventilation holes 3011, or the first ventilation holes 3011 and the second ventilation holes 3012 may be provided by combining the two arrangements, which is not limited in this embodiment.
In some embodiments, as shown in fig. 1 to 2 and fig. 6 to 10, a supporting protrusion 303 is provided on a side of the side plate body facing away from the pole group 10; the supporting protrusions 303 include a plurality of supporting protrusions 303 provided at both sides of the side plate body at intervals along the length direction of the side plate body.
In the above embodiment, the supporting protrusions 303 can support and abut against the inner wall of the housing 40 after the battery is assembled, so as to play a role in supporting and protecting the electrode group 10, and the gap between the two supporting protrusions 303 forms an exhaust channel, which is more beneficial to rapid discharge of gas inside the battery, and prevents the problems of close adhesion between the battery side plate 30 and the inner wall of the housing 40 and unsmooth airflow.
In an alternative embodiment, the support protrusions 303 are bar-shaped ribs, and the top surfaces of the bar-shaped ribs are arc-shaped abutment surfaces protruding in a direction away from the pole group 10.
In the above embodiment, the bump structure is formed by the arc-shaped abutting surface, so that the battery side plate 30 is in point contact with the housing 40, the attaching area is reduced, and the gap space between the two supporting protrusions 303 is larger, which is more beneficial to gas circulation.
Specifically, the strip-shaped ribs are arranged along the length direction of the battery side plate 30, the strip-shaped ribs are of a rib structure with a D-shaped section, the flat surfaces of the strip-shaped ribs are fixedly arranged on the side plate body, and the arc-shaped surfaces of the strip-shaped ribs are suitable for propping against the inner wall of the shell 40.
In some embodiments, the supporting protrusions 303 are disposed on both long sides of the side plate body on both sides of the second vent hole 3012.
In the above embodiment, by providing the supporting protrusions 303 on both sides of the second vent hole 3012 having a larger opening size, functioning as reinforcing ribs, the structural strength at the second vent hole 3012 can be improved.
In some embodiments, vent 301 includes an explosion proof valve relief aperture 3013 disposed in correspondence to explosion proof valve 20; the area of the detonation zone of the explosion-proof valve 20 is set as S 2 The area of the explosion-proof valve avoiding hole 3013 is S 3 0.8S 2 ＜S 3 ＜1.2S 2 。
In the above embodiment, the explosion-proof valve avoiding hole 3013 is designed by adopting the above dimensions, so that the explosion-proof valve 20 can be effectively ensured to be normally blasted, and meanwhile, the influence of the overlarge opening area of the explosion-proof valve avoiding hole 3013 on the structural strength of the battery side plate 30 is avoided.
In some embodiments, the battery side plate 30 is integrally formed using an injection molding process. In this embodiment, the battery side plate 30 formed by integral injection molding is matched with the pole group 10, the thickness and shape of the battery side plate 30 are not limited, and the battery side plate 30 can be processed into any shape according to actual needs, so that the process difficulty of the battery side plate 30 is reduced.
In this embodiment, the supporting protrusion 303 and the side plate body are not on the same plane, that is, the thickness of the whole battery side plate is inconsistent, the battery side plate 30 manufactured by adopting the injection molding process can be processed to manufacture the battery side plate 30 with inconsistent thickness, and the problem that die-cutting pieces can only be processed to manufacture the battery side plate with consistent thickness is relatively limited is effectively solved.
As shown in fig. 1, 2 and 9 to 11 in combination, according to an embodiment of the present utility model, in another aspect, there is provided a battery 100 including a pole group 10, a case 40, an explosion-proof valve 20, a battery side plate 30 of any of the above embodiments, the case 40 having a receiving chamber inside, the pole group 10 being disposed in the receiving chamber; the explosion-proof valve 20 is installed at a side portion of the housing 40, and the explosion-proof valve 20 is adapted to be opened at a preset pressure for the gas in the accommodating chamber to be discharged; the battery side plate 30 is disposed between the pole group 10 and the explosion-proof valve 20.
In some embodiments, the battery side plate 30 includes oppositely disposed first and second sides, wherein: the first side is adhered and fixed on the side wall of the pole group 10, and a plurality of supporting bulges 303 are arranged on two strip edges of the second side at intervals; the support protrusions 303 are adapted to be supported against the inner wall of the housing 40 to form an exhaust passage through which the air flow can circulate between adjacent two of the support protrusions 303.
In the above embodiment, the gas inside the battery can be rapidly discharged through the exhaust passage formed by the gap between the two supporting protrusions 303, preventing the problem that the battery side plate 30 is closely attached to the inner wall of the case 40 and the gas flow is not smooth.
It should be noted that, the pole group 10 in this embodiment is a single bare cell with positive and negative pole pieces, or may be a pole group formed by connecting a plurality of bare cells in series. The electrode group 10 is connected with the external insulating film by hot melt or adhesive tape.
Optionally, in this embodiment, the housing 40 is an aluminum housing.
In some embodiments, as shown in fig. 1, 9 to 11, the two ends of the pole group 10 are also fixedly provided with a first cover plate 50 and a second cover plate 60; the shell 40 is a hollow shell with two open ends, and the shell 40 is sleeved on the periphery of the pole group 10; the first cover plate 50 is connected to one end of the housing 40, and a first pole is arranged on the first cover plate 50; the second cover plate 60 is connected to the other end of the housing, and a second pole is disposed on the second cover plate 60.
In some embodiments, a bottom plate is also provided on the bottom of the pole set 10, the bottom plate being disposed on opposite sides of the pole set 10 from the battery side plates 30.
The battery in the example can be a power battery such as a lithium ion battery or a sodium ion battery, and is used for mechanical equipment such as an electric automobile which needs electric starting.
The embodiment provides a battery with high safety, good use effect and easy installation.
The utility model has the following advantages:
1. the battery side plate 30 of this embodiment adopts an injection molding process, and can be processed according to different requirements of the pole group 10 to form a battery side plate 30 with a relatively complex shape and structure, which is matched with the battery side plate 30.
2. In this embodiment, the distribution ratio and distribution manner of the ventilation holes 301 of the battery side plate 30 are defined, so that the distribution of the air passages inside the pole group 10 is improved, and the safety of the pole group 10 is improved.
3. According to the embodiment, through the arranged battery side plate 30, specification parameters of the battery side plate 30 are more reasonably designed, and enough air passage space and structural safety protection are provided for the battery 100 with the explosion-proof valve 20 arranged on the side part.
Although embodiments of the present utility model have been described in connection with the accompanying drawings, various modifications and variations may be made by those skilled in the art without departing from the spirit and scope of the utility model, and such modifications and variations fall within the scope of the utility model as defined by the appended claims.
Claims (10)
1. A battery side plate disposed between a pole group and an explosion-proof valve, the battery side plate comprising:
the side plate body is provided with an area S;
the vent hole is formed in the side plate body, and the opening area of the vent hole is S 1 Wherein 5% < S 1 /S＜50％。
2. The battery side plate according to claim 1, wherein a plurality of the vent holes are provided in the side plate body at intervals along the length direction of the side plate body.
3. The battery side plate according to claim 1, wherein the side plate body comprises two strip edges which are oppositely arranged, and a plurality of concave parts are respectively arranged on the edges of the strip edges at intervals.
4. The battery side plate according to claim 3, wherein the concave portions of the two long sides of the side plate body are disposed opposite to each other, and the side plate body includes a narrowed region between the opposite concave portions and an invariable region of constant width on both sides of the narrowed region.
5. The battery side plate according to claim 4, wherein the vent hole includes a first vent hole provided in the narrowed region and a second vent hole provided in the constant region, the first vent hole being smaller than the second vent hole.
6. The battery side plate according to any one of claims 1 to 5, wherein a side surface of the side plate body facing away from the pole group is provided with a support protrusion;
the support protrusions comprise a plurality of support protrusions which are arranged on two sides of the side plate body at intervals along the length direction of the side plate body.
7. The battery side plate according to claim 6, wherein the support projection is a bar-shaped bead, and a top surface of the bar-shaped bead is an arc-shaped abutment surface projecting in a direction away from the pole group.
8. The battery side plate according to any one of claims 1 to 5, wherein the vent hole includes an explosion-proof valve escape hole provided corresponding to the explosion-proof valve;
setting the area of the detonation zone of the explosion-proof valve as S 2 The area of the avoidance hole of the explosion-proof valve is S 3 0.8S 2 ＜S 3 ＜1.2S 2 。
9. A battery, comprising:
a pole group;
a housing having a receiving cavity therein, the pole set being disposed in the receiving cavity;
an explosion-proof valve installed at a side portion of the housing, the explosion-proof valve being adapted to be opened at a preset pressure for discharging the gas in the accommodating chamber;
a battery side plate as claimed in any one of claims 1 to 8, disposed between the pole group and the explosion-proof valve.
10. The battery of claim 9, wherein the battery side plate comprises oppositely disposed first and second sides, wherein:
the first side surface is adhered and fixed on the side wall of the pole group, and a plurality of supporting protrusions are arranged on two strip edges of the second side surface at intervals;
the support protrusions are adapted to be supported against the inner wall of the housing to form an exhaust channel between two adjacent support protrusions through which an air flow can circulate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321668010.3U CN220138385U (en) | 2023-06-28 | 2023-06-28 | Battery side plate and battery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321668010.3U CN220138385U (en) | 2023-06-28 | 2023-06-28 | Battery side plate and battery |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220138385U true CN220138385U (en) | 2023-12-05 |
Family
ID=88960666
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321668010.3U Active CN220138385U (en) | 2023-06-28 | 2023-06-28 | Battery side plate and battery |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220138385U (en) |
-
2023
- 2023-06-28 CN CN202321668010.3U patent/CN220138385U/en active Active
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