CN115693013A - Protection paster, end cover, energy storage device and consumer - Google Patents
Protection paster, end cover, energy storage device and consumer Download PDFInfo
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- CN115693013A CN115693013A CN202211451791.0A CN202211451791A CN115693013A CN 115693013 A CN115693013 A CN 115693013A CN 202211451791 A CN202211451791 A CN 202211451791A CN 115693013 A CN115693013 A CN 115693013A
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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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Abstract
The invention discloses a protective patch, an end cover, an energy storage device and electric equipment, wherein the protective patch is provided with a first surface facing an explosion-proof valve and a second surface arranged opposite to the first surface, the protective patch is provided with a ventilation through hole penetrating through the first surface and the second surface, the area of the ventilation through hole on the first surface is S1, the area of the first surface is S2, and S1/S2 is more than or equal to 0.5% and less than or equal to 5%. The protection patch, the end cover, the energy storage device and the electric equipment provided by the embodiment of the invention can not only prevent the protection patch from tilting or falling off and protect the explosion-proof valve from being polluted, but also can timely explode the explosion-proof valve so as to ensure the use safety of the battery.
Description
Technical Field
The invention relates to the technical field of batteries, in particular to a protection patch, an end cover, an energy storage device and electric equipment.
Background
In order to protect the explosion-proof valve, an explosion-proof valve protection patch fixed to a battery end cover is generally disposed above the explosion-proof valve, so as to prevent dust, electrolyte and the like from polluting the explosion-proof valve.
However, the battery in the related art is usually vacuumized before liquid injection, so that the pressure in the explosion-proof hole is inconsistent with the external pressure, the explosion-proof valve protection patch is tilted or even falls off, and the electrolyte may flow into the explosion-proof hole to pollute the explosion-proof valve. And the battery can produce the secondary reaction gas when charging and discharging, and these gases can pile up in the cavity between explosion-proof valve and explosion-proof valve protection paster, lead to the inside and outside atmospheric pressure of explosion-proof valve to be difficult to maintain balanced to probably can lead to the explosion-proof valve to explode untimely, the emergence is exploded, has certain potential safety hazard, has greatly reduced the security of battery.
Disclosure of Invention
The embodiment of the invention discloses a protection patch, an end cover, an energy storage device and electric equipment, which can not only prevent the protection patch from tilting or falling off and protect an explosion-proof valve from being polluted, but also can timely explode the explosion-proof valve so as to ensure the use safety of the energy storage device.
In order to achieve the above object, in a first aspect, the present invention discloses a protection patch for protecting an explosion-proof valve of an energy storage device, where the protection patch has a first surface and a second surface that are opposite to each other, and the protection patch is provided with a ventilation through hole penetrating through the first surface and the second surface, the area of the ventilation through hole on the first surface is S1, the area of the first surface is S2, and where S1/S2 is greater than or equal to 0.5% and less than or equal to 5%.
In the protection patch provided by the invention, the ventilation through hole is formed in the protection patch, so that air can be exhausted or admitted through the ventilation through hole, and the effect of balancing the internal air pressure and the external air pressure is achieved, therefore, on one hand, the situation that the protection patch is tilted or falls off due to the inconsistency of the internal air pressure and the external air pressure can be solved, the situation that the explosion-proof valve is polluted by dust, powder, electrolyte and the like due to the failure of the protection patch can be reduced or even avoided, and the service life of the explosion-proof valve is prolonged; on the other hand, the explosion-proof valve can explode in time when the internal air pressure of the energy storage device reaches a preset explosion value, the explosion accuracy of the explosion-proof valve is improved, and therefore the use safety of the energy storage device is improved.
Furthermore, the ratio of the area of the ventilation through hole on the first surface of the protection patch to the area of the first surface is limited to be 0.5% -5%, so that the situation that the ventilation through hole is too small to affect the processing of the ventilation through hole can be avoided, and the situation that dust, powder, electrolyte and the like flow into the explosion-proof valve to pollute the explosion-proof valve due to too large ventilation through hole can be avoided.
As an alternative implementation, in an embodiment of the first aspect of the present invention, the protective patch includes a transparent region and an adhesive region connected to the transparent region, the air-permeable through hole is disposed on the transparent region, the adhesive region surrounds the outside of the transparent region, and the adhesive region is used for bonding with an end cap of the energy storage device; the thickness of the transparent area is 0.125 mm-0.19 mm along the direction perpendicular to the first surface.
It should be noted that when the explosion-proof valve explodes, the transparent area of the protection patch and the explosion-proof valve are cracked together, so that gas in the energy storage device can be discharged to the outside, and on the basis, if the thickness of the transparent area is too thick, the transparent area is not easy to crack, so that the explosion pressure relief of the explosion-proof valve is influenced, the explosion performance of the explosion-proof valve is influenced, an effective explosion-proof effect is difficult to achieve, and the explosion risk of the energy storage device is easy to increase; if the thickness of the transparent area is too thin, the protective performance of the protective patch can be influenced, and electrolyte is easily immersed into the explosion-proof valve when the energy storage device is filled with the electrolyte, so that the explosion-proof valve is polluted. Therefore, the thickness of the transparent area is controlled within the range of 0.125 mm-0.19 mm, the protection performance of the protection patch can be considered, and meanwhile, the explosion performance of the explosion-proof valve is prevented from being influenced, so that the explosion-proof valve can be ensured to explode in time when the internal air pressure reaches a preset explosion value, and the use safety of the energy storage device is improved.
As an alternative implementation, in the embodiment of the first aspect of the present invention, the annular width of the adhesive area is 0.5mm to 1.5mm in the radial direction of the protection patch.
It can be understood that the size of the ring width of the adhesive region determines the connection reliability between the protection patch and the end cover of the energy storage device, if the ring width of the adhesive region is too small, the attachment area between the adhesive region and the end cover of the energy storage device is insufficient, the attachment viscosity is insufficient, and the protection patch is easy to fall off, so that the explosion-proof valve loses protection; if the ring width in sticky region is too big, then can lead to the area of the glue film in sticky region to be greater than the area that the end cover is used for the sticky one side with sticky region for the glue film can partly do not utilize more, leads to the waste, perhaps, needs the end cover to be used for the grow that corresponds with the area of the sticky one side in sticky region, can lead to the attached area increase of sticky region and end cover like this, and attached viscidity becomes strong, probably can influence the burst pressure of explosion-proof valve. Therefore, the ring width of the gluing area is controlled within the range of 0.5 mm-0.15 mm, the bonding reliability of the protection patch and the end cover can be improved, the protection performance of the protection patch is ensured, meanwhile, the explosion performance of the explosion-proof valve is prevented from being influenced, the explosion-proof valve is ensured to be capable of exploding in time when the internal air pressure reaches a preset explosion value, and the use safety of the energy storage device is improved.
As an alternative embodiment, in an embodiment of the first aspect of the invention, the total mass of the protection patches is M,1.75 x 10 -4 (S2-S1)≤M≤2.66*10 -4 (S2-S1) by controlling the total mass M of the protection patch to 1.75 x 10 -4 (S2-S1)～2.66*10 -4 In the range of (S2-S1), the thickness of the transparent area of the protection patch can be controlled in a proper range to avoid the condition that the thickness of the transparent area of the protection patch is too thick or too thin, so that the protection performance of the protection patch can be considered, meanwhile, the explosion performance of the explosion-proof valve is prevented from being influenced, and the explosion-proof valve is ensuredCan in time explode when inside atmospheric pressure reaches and predetermines the blasting value, and then be favorable to improving energy memory's safety in utilization.
As an alternative implementation, in an embodiment of the first aspect of the invention, the adhesive area has a peel strength of 75N/100mm to 120N/100mm. The peeling strength of the adhesive area is controlled within the range of 75N/100mm-120N/100mm, so that the bonding reliability of the end covers of the protection patch and the energy storage device can be guaranteed, the situation that the peeling strength of the adhesive area is too strong to influence the explosion performance of the explosion-proof valve is avoided, the explosion-proof valve can be timely exploded when the internal air pressure reaches a preset explosion value, and the use safety of the energy storage device is improved.
As an alternative implementation manner, in an embodiment of the first aspect of the present invention, the ventilation through hole is disposed at the center of the protection patch, so that a distance from the ventilation through hole to any position of a connection between the protection patch and the battery end cover can be substantially consistent, so that an adhesion force when the protection patch is attached and adhered to the battery end cover can be substantially maintained uniform, adhesion stability between the protection patch and the battery end cover is improved, and the protection patch is prevented from being detached from the battery end cover, so as to reduce a failure probability of the protection patch.
As an alternative, in the embodiment of the first aspect of the present invention, the shape of the protection patch and the shape of the ventilation through hole are regular shapes, which facilitates the processing of the protection patch and the ventilation through hole.
In a second aspect, the invention discloses an end cover of an energy storage device, which comprises an end cover body, an explosion-proof valve and the protection patch of the first aspect, wherein the end cover body is provided with a first surface and a second surface which are opposite, the end cover body is provided with an explosion-proof hole which penetrates through the first surface and the second surface, the explosion-proof valve is arranged in the explosion-proof hole, the protection patch is arranged on the second surface and covers the explosion-proof hole, the first surface and the first surface face in the same direction, and the second surface face in the same direction. It can be understood that, have above-mentioned first aspect the end cover of protection paster also has above-mentioned first aspect whole beneficial effect of protection paster, promptly, have above-mentioned first aspect the end cover of protection paster, also can avoid the protection paster perk or drop, the protection explosion-proof valve does not receive the pollution, can also make explosion-proof valve in time explode simultaneously to ensure energy memory's safety in utilization.
As an alternative embodiment, in the embodiment of the second aspect of the present invention, the distance from the protection patch to the explosion-proof valve in the direction perpendicular to the first surface is 0.80mm to 1.60mm. This is mainly considered: there may be foreign matter extrusion protection paster in the direction of perpendicular to first surface for the protection paster can receive pressure and take place elastic deformation along the direction towards explosion-proof valve, may extrude explosion-proof valve, through the distance control that will protect the paster to explosion-proof valve at 0.80mm ~ 1.60 mm's within range, can avoid explosion-proof valve to receive the extrusion because of the protection paster is extruded by the foreign matter, protection explosion-proof valve, thereby be favorable to improving explosion-proof valve's life.
As an alternative implementation manner, in an embodiment of the second aspect of the present invention, the second surface is recessed in the end cap body to form a sinking groove, the sinking groove is communicated with the explosion-proof hole, the protection patch is disposed in the sinking groove, and the first surface is attached to a bottom surface of the sinking groove, so that on one hand, an installation position of the protection patch on the end cap body can be defined by using the sinking groove to ensure that the protection patch can be disposed corresponding to the explosion-proof valve, so that the protection patch can effectively protect the explosion-proof valve 22; on the other hand, the protection paster sets up in heavy groove, can avoid the protection paster protruding to be established on the second surface to avoid the protection paster to collide with other parts and suffer the damage, promptly, can utilize this heavy groove to play certain guard action to the protection paster.
As an optional implementation manner, in an embodiment of the second aspect of the present invention, the first surface includes a bonding region bonded to the bottom surface of the sinking groove, an area of the bonding region is S3, an area of the bottom surface of the sinking groove is S4, and S3/S4 is greater than or equal to 0.7 and less than or equal to 0.9.
So design for the area of the laminating region of protection paster can slightly be lighter than the area of the bottom surface that sinks the groove, is favorable to making the whole size of protection paster can slightly be lighter than the whole size that sinks the groove, thereby can guarantee that the protection paster can all attached in sinking the groove, is favorable to improving the attached effect of protection paster in sinking the groove, in order to ensure the protection effect of this protection paster. If S3/S4 is less than 0.7, the area of the bonding area of the protection patch is too small relative to the bottom surface of the sinking groove, so that the overall size of the protection patch is too small relative to the overall size of the sinking groove, and therefore, during bonding, the center of the protection patch is difficult to ensure to approximately coincide with the center of the sinking groove, eccentricity is possibly caused, and the bonding area of the protection patch is too small or the bonding effect is poor; if S3/S4 > 0.9, the bottom surface that sinks the groove relatively is too big in the regional area of laminating of protection paster, make the overall dimension that sinks the groove relatively of protection paster too big, thereby make the outer peripheral face of protection paster and do not attached space before sinking the lateral wall face of groove, can't guarantee that the protection paster is whole attached in sinking the inslot, but can make protection paster part can paste outside sinking the groove, influence the laminating compactness between protection paster and the heavy groove, and then influence the protection effect of protection paster.
As an optional implementation manner, in an embodiment of the second aspect of the present invention, in a direction parallel to the first surface, a width of the sinking groove is 0.08mm to 0.15mm larger than a width of the protection patch, so as to ensure that the protection patch can be completely attached in the sinking groove, which is beneficial to improving an attachment effect of the protection patch in the sinking groove, so as to ensure a protection effect of the protection patch.
As an alternative implementation manner, in an embodiment of the second aspect of the present invention, the explosion-proof valve includes a body portion and a connecting portion connected to the body portion, the connecting portion is connected to the end cap body, the body portion is disposed corresponding to the explosion-proof hole and covers the explosion-proof hole, and the transparent area of the protection patch covers the body portion. Through injecing explosion-proof valve including this somatic part that corresponds explosion-proof hole and the connecting portion that are used for connecting the end cover body, when the predetermined blasting value of explosion-proof valve is reachd to atmospheric pressure in the energy memory, this somatic part that gaseous in the energy memory just can break away, the transparent region of protection paster carries out explosion-proof pressure release, simultaneously because connecting portion connect in the end cover body, can be when this somatic part is broken away by the gas in the energy memory and is carried out explosion-proof pressure release, avoid whole explosion-proof valve to splash and lead to the fact the condition of damage to other spare parts. And the transparent region of protection paster corresponds the main blasting region (being this somatic part) setting of explosion-proof valve, and whether the main blasting region of explosion-proof valve takes place the inflation or has the damage conveniently to observe through this transparent region, so that can in time inspect the state of explosion-proof valve, thereby ensure that explosion-proof valve can normal use, in order to ensure energy memory's safety in utilization.
As an alternative implementation, in an embodiment of the second aspect of the present invention, the end cap further includes a conductive component, and the conductive component is disposed on the end cap body; the protection patch is a circular patch, the diameter of the protection patch is R, the ventilation through hole is a circular hole, the shortest distance from the center of the ventilation through hole to the conductive part is D, and D/R is more than or equal to 0.55 and less than or equal to 0.85. When satisfying the within range that above-mentioned relational expression was injectd, can avoid protecting paster, explosion-proof valve to be too close to electrically conductive part to when the electric core thermal runaway of battery leads to explosion-proof valve to explode, can avoid explosion-proof valve direct overlap joint in electrically conductive part to lead to the condition of short circuit to appear.
In a third aspect, the present invention discloses an energy storage device having an end cap as described in the second aspect above. It can be understood that, because the end cover of the above second aspect has all the beneficial effects of the protection patch of the above first aspect, then the energy storage device of the end cover of the above second aspect also has all the technical effects of the protection patch of the above first aspect, that is, the energy storage device of the end cover of the above second aspect can also avoid the protection patch from tilting or falling off, protect the explosion-proof valve from being polluted, and simultaneously can also make the explosion-proof valve explode in time to ensure the safety in use of the energy storage device.
In a fourth aspect, the invention discloses an electric device, which has the energy storage device according to the third aspect. It can be understood that, since the energy storage device of the third aspect has all the advantages of the protection patch of the first aspect, the electric equipment having the energy storage device of the third aspect also has all the technical effects of the protection patch of the first aspect, that is, the electric equipment having the energy storage device of the third aspect can also avoid the protection patch from tilting or falling off, protect the explosion-proof valve from being polluted, and simultaneously can timely explode the explosion-proof valve to ensure the use safety of the battery.
Compared with the prior art, the invention has the beneficial effects that:
according to the protection patch, the end cover, the energy storage device and the electric equipment provided by the embodiment of the invention, the ventilation through hole is formed in the protection patch, so that air can be exhausted or admitted through the ventilation through hole, and the effect of balancing internal air pressure and external air pressure is achieved, so that on one hand, the situation that the protection patch is tilted or falls off due to inconsistent internal air pressure and external air pressure can be solved, the situation that dust, powder, electrolyte and the like pollute the explosion-proof valve due to failure of the protection patch can be reduced or even avoided, and the service life of the explosion-proof valve is prolonged; on the other hand, can make explosion-proof valve in time explode when inside atmospheric pressure reaches predetermineeing the blasting value, improve explosion accuracy of explosion-proof valve to be favorable to improving the safety in utilization of battery.
Furthermore, the ratio of the area of the ventilation through hole on the first surface of the protection patch to the area of the first surface is limited to be 0.5% -5%, so that the situation that the ventilation through hole is too small to affect the processing of the ventilation through hole can be avoided, and the situation that dust, powder, electrolyte and the like flow into the explosion-proof valve to pollute the explosion-proof valve due to too large ventilation through hole can be avoided.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without creative efforts.
Fig. 1 is a schematic structural diagram of a protection patch disclosed by an embodiment of the invention;
fig. 2 is a front view of a disclosed protective patch of an embodiment of the present invention;
FIG. 3 is a schematic structural diagram of an end cap of an energy storage device according to an embodiment of the disclosure;
FIG. 4 is an exploded schematic view of an end cap of the energy storage device of FIG. 3;
FIG. 5 isbase:Sub>A cross-sectional view of the end cap of the energy storage device of FIG. 3 taken along A-A;
FIG. 6 is a partial enlarged view at M in FIG. 5;
FIG. 7 is a schematic structural diagram of an energy storage device according to an embodiment of the disclosure;
fig. 8 is an exploded schematic view of an energy storage device according to an embodiment of the disclosure.
Description of the main reference numerals
1. A protective patch; 1a, a first face; 101. a fitting region; 1b, a second face; 11. a ventilation through hole; 12. a transparent region; 13. a glue area.
2. An end cap; 21. an end cap body; 21a, a first surface; 21b, a second surface; 211. an explosion-proof hole; 212. sinking a groove; 2121. a bottom surface; 22. an explosion-proof valve; 221. a body portion; 222. a connecting portion; 23. a conductive member.
3. An energy storage device; 31. a housing; 31a, an accommodating cavity; 31b, an opening; 32. and (5) battery cores.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be obtained by a person skilled in the art without making any creative effort based on the embodiments in the present invention, belong to the protection scope of the present invention.
In the present invention, the terms "upper", "lower", "left", "right", "front", "rear", "top", "bottom", "inner", "outer", "center", "vertical", "horizontal", "lateral", "longitudinal", and the like indicate an orientation or positional relationship based on the orientation or positional relationship shown in the drawings. These terms are used primarily to better describe the invention and its embodiments and are not intended to limit the indicated devices, elements or components to a particular orientation or to be constructed and operated in a particular orientation.
Moreover, some of the above terms may be used in other meanings besides orientation or positional relationship, for example, the term "upper" may also be used in some cases to indicate a certain attaching or connecting relationship. The specific meanings of these terms in the present invention can be understood according to specific situations by those of ordinary skill in the art.
Furthermore, the terms "mounted," "disposed," "provided," "connected," and "connected" are to be construed broadly. For example, it may be a fixed connection, a removable connection, or a unitary construction; can be a mechanical connection, or an electrical connection; may be directly connected, or indirectly connected through intervening media, or may be in internal communication between two devices, elements or components. The specific meanings of the above terms in the present invention can be understood according to specific situations by those of ordinary skill in the art.
Furthermore, the terms "first," "second," and the like, are used primarily to distinguish one device, element, or component from another (the specific nature and configuration may be the same or different), and are not used to indicate or imply the relative importance or number of the indicated devices, elements, or components. "plurality" means two or more unless otherwise specified.
The technical solution of the present invention will be further described with reference to the following examples and drawings.
Referring to fig. 1 and 2, an embodiment of a first aspect of the present invention discloses a protection patch 1, where the protection patch 1 is configured to correspond to an explosion-proof valve of an energy storage device, so as to reduce or prevent dust, powder, electrolyte, and the like from contaminating the explosion-proof valve, so as to protect the explosion-proof valve. The protection patch 1 provided by the embodiment of the invention can effectively protect the explosion-proof valve from being polluted by dust, powder, electrolyte and the like, and can also timely explode the explosion-proof valve so as to ensure the use safety of the energy storage device.
It should be understood that, as shown in fig. 3 and 4, the explosion-proof valve provided by the embodiment of the present invention may be the explosion-proof valve 22 on the end cover 2 of the energy storage device, that is, the explosion-proof hole 211 is provided on the end cover 2, and the explosion-proof valve 22 is provided on the explosion-proof hole 211. Specifically, the explosion-proof valve 22 may include a body portion 221 and a connecting portion 222 connected to the body portion 221, the connecting portion 222 being connected to the end cap 2, the body portion 221 being disposed corresponding to the explosion-proof hole 211 and being sealed to the explosion-proof hole 211, and the protection patch 1 being disposed corresponding to the explosion-proof valve 22 to protect the explosion-proof valve 22. When the air pressure in the energy storage device reaches the preset explosion value of the explosion-proof valve 22, the air in the energy storage device can burst the body part 221 of the explosion-proof valve 22 and the protection patch 1 for explosion-proof pressure relief.
In the embodiment of the present invention, as shown in fig. 1 and 2, the protection patch 1 has a first face 1a disposed toward the explosion-proof valve and a second face 1b disposed opposite to the first face 1a, and the protection patch 1 is provided with a ventilation through hole 11 penetrating the first face 1a and the second face 1b, wherein the ventilation through hole 11 has an area S1 on the first face 1a, and the area S2 of the first face 1a is 0.5% to 5% such as S1/S2=0.5%, 0.7%, 0.9%, 1.0%, 1.1%, 1.3%, 1.5%, 1.8%, 2.0%, 2.3%, 2.5%, 2.8%, 3.0%, 3.2%, 3.5%, 3.8%, 4.0%, 4.3%, 4.5%, 4.7%, 4.9%, 5.0%, or the like.
In the protection patch 1 provided by the embodiment of the application, the ventilation through hole 11 is formed in the protection patch 1, so that air can be exhausted or admitted through the ventilation through hole 11, and the effect of balancing the internal air pressure and the external air pressure is achieved, therefore, on one hand, the situation that the protection patch 1 tilts or falls off due to the fact that the internal air pressure and the external air pressure are inconsistent can be solved, the situation that dust, powder, electrolyte and the like pollute an explosion-proof valve due to failure of the protection patch 1 can be reduced or even avoided, and the service life of the explosion-proof valve is further prolonged; on the other hand, can avoid the side reaction gas that energy memory produced when charging and discharging to pile up in the cavity between explosion-proof valve and protection paster 1 to be favorable to making explosion-proof valve can in time explode when inside atmospheric pressure reaches predetermined blasting value, improve explosion accuracy of explosion-proof valve, thereby be favorable to improving energy memory's safety in utilization. The explosion accuracy refers to the degree of closeness of the actual pressure and the preset explosion value of the pressure when the explosion-proof valve explodes.
It can be understood that, if the ventilation through hole 11 is too small, it is unfavorable for the processing of ventilation through hole 11, if ventilation through hole 11 is too big, dust, powder, electrolyte enters into the explosion-proof valve through this ventilation through hole 11 easily, pollute the explosion-proof valve, make protection paster 1 can't play the effect of protection explosion-proof valve, so this application still prescribes a limit to ventilation through hole 11 and is 0.5% -5% with the area of first face 1 a's the ratio of area on the first face 1a of protection paster 1, can avoid ventilation through hole 11 too little and influence the processing of ventilation through hole 11, and avoid ventilation through hole 11 too big and make dust, powder, electrolyte etc. flow into the explosion-proof valve, pollute the explosion-proof valve, therefore, it can be seen that, the ratio control of ventilation through hole 11 area on the first face 1a of protection paster 1 and the area of first face 1a is in above-mentioned range, can be when reaching the balanced effect of inside and outside atmospheric pressure, make things convenient for the processing of ventilation through hole 11, can also ensure the protection effect of protection paster 1 simultaneously.
In the present embodiment, the shape of the protection patch 1 may be a regular shape or an irregular shape, and when the shape of the protection patch 1 is a regular shape, the shape of the protection patch 1 may be a circle, a square, a rectangle, a diamond, a regular polygon, or the like. Similarly, the shape of the ventilation through holes 11 may be regular or irregular, and when the shape of the ventilation through holes 11 is regular, the shape of the ventilation through holes 11 may be circular, square, rectangular, rhombic, regular polygonal, or the like. Preferably, the shape of the protective patch 1 and the shape of the ventilation through-hole 11 are both regular shapes, so as to facilitate the processing of the protective patch 1 and the ventilation through-hole 11. Illustratively, the shape of the protective patch 1 and the shape of the vent hole 11 may both be circular.
In some embodiments, the ventilation through hole 11 may be disposed at the center of the protection patch 1, that is, the center of the ventilation through hole 11 substantially coincides with the center of the protection patch 1, so that the distance from the ventilation through hole 11 to any position of the connection between the protection patch 1 and the end cap of the energy storage device may be substantially consistent, thereby substantially maintaining uniform adhesion force when the protection patch 1 is bonded to the end cap of the energy storage device, improving bonding stability between the protection patch 1 and the end cap of the energy storage device, and preventing the protection patch 1 from being separated from the end cap of the energy storage device, so as to reduce failure probability of the protection patch 1.
In some embodiments, as shown in fig. 1 and 2, the protection patch 1 includes a transparent area 12 and an adhesive area 13 connected to the transparent area 12, the transparent area 12 is disposed corresponding to the body portion of the explosion-proof valve, and the air-permeable through hole 11 is disposed on the transparent area 12, the adhesive area 13 surrounds the outside of the transparent area 12, and the adhesive area 13 is used for bonding with the end cap of the energy storage device to achieve connection of the protection patch 1 with the end cap of the energy storage device. And the thickness h1 of the transparent region 12 may be 0.125mm to 0.19mm in a direction perpendicular to the first face 1a, for example, in an up-down direction in fig. 2, and for example, the thickness h1 of the transparent region 12 may be 0.125mm, 0.130mm, 0.135mm, 0.140mm, 0.145mm, 0.150mm, 0.155mm, 0.160mm, 0.165mm, 0.170mm, 0.175mm, 0.180mm, 0.185mm, 0.19mm, or the like.
It should be noted that, when the explosion-proof valve explodes, the transparent area 12 of the protection patch 1 should crack together with the body of the explosion-proof valve, so that the gas in the energy storage device can be discharged to the outside, and based on this, if the thickness of the transparent area 12 is too thick, the transparent area 12 is not easy to crack, thereby affecting the explosion pressure relief of the explosion-proof valve, affecting the explosion performance of the explosion-proof valve, and being difficult to achieve an effective explosion-proof effect, and further increasing the risk of explosion of the energy storage device; if the thickness of the transparent region 12 is too thin, the protective performance of the protective patch 1 is affected, and electrolyte is more likely to enter the explosion-proof valve during the liquid injection of the energy storage device, thereby polluting the explosion-proof valve. Therefore, the thickness h1 of the transparent area 12 is controlled within the range of 0.125 mm-0.19 mm, the protection performance of the protection patch 1 can be considered, and meanwhile, the explosion performance of the explosion-proof valve is prevented from being influenced, so that the explosion-proof valve can be ensured to explode in time when the internal air pressure reaches a preset explosion value, and the use safety of the energy storage device is improved.
Furthermore, because the region of the protection patch 1 corresponding to the body part of the explosion-proof valve is the transparent region 12, whether the explosion-proof valve expands or is damaged can be observed through the transparent region 12, so that the state of the explosion-proof valve can be checked in time; and meanwhile, whether electrolyte is immersed into the explosion-proof valve or not can be observed, so that whether electrolyte is infiltrated into the explosion-proof valve or not can be conveniently identified.
Alternatively, the material of the protection patch 1 may be polyethylene terephthalate (PET), polyimide (PI), polyethylene (PE), polypropylene (PP), polymethyl methacrylate (PMMA), polytetrafluoroethylene (PTFE), polyvinyl chloride (PVC), polycarbonate (PC), or the like. The adhesive area 13 of the protective patch 1 is provided with a blue transparent glue layer, such as a single-sided glue layer, a substrate-free double-sided glue layer or equivalent glue layers thereof, to enable the connection of the adhesive area 13 and the end cap of the energy storage device by means of the glue layer. Preferably, the glue layer may be 3M467 double sided tape or 3M468 double sided tape, etc.
In some embodiments, the total mass of the protective patch 1 is M, wherein 1.75 x 10 -4 (S2-S1)≤M≤2.66*10 -4 (S2-S1) by controlling the total mass M of the patch 1 at 1.75 x 10 -4 (S2-S1)～2.66*10 -4 Within the range of (S2-S1), the thickness of the transparent region 12 of the protection patch 1 can be controlled within a proper range, so that the thickness of the transparent region 12 of the protection patch 1 is prevented from being too thick or too thin, the explosion performance of the explosion-proof valve can be prevented from being influenced while the protection performance of the protection patch 1 is taken into consideration, the explosion-proof valve can be prevented from being exploded in time when the internal air pressure reaches a preset explosion value, and the use safety of the battery can be improved.
In some embodiments, as shown in fig. 1 and 2, the loop width b1 of the adhesive area 13 may be 0.5mm to 1.5mm along the radial direction of the protective patch 1, for example, the X direction in fig. 1, for example, the loop width b1 of the adhesive area 13 is 0.5mm, 0.6mm, 0.7mm, 0.8mm, 0.9mm, 1.0mm, 1.1mm, 1.2mm, 1.3mm, 1.4mm, 1.5mm, and the like.
It can be understood that the size of the ring width b1 of the adhesive area 13 determines the connection reliability between the protection patch 1 and the end cover of the energy storage device, if the ring width b1 of the adhesive area 13 is too small, the attachment area between the adhesive area 13 and the end cover of the energy storage device is insufficient, the attachment viscosity is insufficient, and the protection patch 1 easily falls off, so that the explosion-proof valve loses protection, especially when the energy storage device is charged and discharged, the temperature of the energy storage device can rise to a higher temperature, so that the adhesive layer of the adhesive area 13 melts, and the viscosity of the adhesive layer is reduced, because the ring width of the adhesive area 13 is too small, the proportion of the melted part in the adhesive layer to the total adhesive layer is large, so that the attachment viscosity between the adhesive area 13 and the end cover of the energy storage device is reduced, so that the protection patch 1 easily falls off, and the explosion-proof valve loses protection; if the ring width b1 of the adhesive region 13 is too large, the area of the glue layer of the adhesive region 13 is larger than the area of the battery end cover used for the side adhered to the adhesive region 13, so that a part of the glue layer is not used, which causes waste, or the area of the battery end cover used for the side adhered to the adhesive region 13 is required to be enlarged, which causes the attachment area of the adhesive region 13 and the battery end cover to be enlarged, the attachment viscosity to be increased, and the explosion pressure of the explosion-proof valve to be possibly influenced. Therefore, the ring width b1 of the gluing area 13 is controlled within the range of 0.5 mm-0.15 mm, the bonding reliability of the protection patch 1 and the battery end cover can be improved, the protection performance of the protection patch 1 is ensured, meanwhile, the explosion performance of the explosion-proof valve is prevented from being influenced, the explosion-proof valve is ensured to be capable of exploding in time when the internal air pressure reaches a preset explosion value, and the use safety of the battery is improved.
Illustratively, the peel strength of the adhesive area 13 may be 75N/100mm-120N/100mm, e.g. the peel strength of the adhesive area 13 is 75N/100mm, 80N/100mm, 85N/100mm, 90N/100mm, 95N/100mm, 100N/100mm, 105N/100mm, 115N/100mm or 120N/100mm, etc. The peeling strength of the adhesive area 13 is controlled within the range of 75N/100mm-120N/100mm, so that the bonding reliability of the protective patch 1 and the end cover of the energy storage device can be ensured, the influence of the excessively strong peeling strength of the adhesive area 13 on the explosion performance of the explosion-proof valve can be avoided, the explosion of the explosion-proof valve can be timely ensured when the internal air pressure reaches a preset explosion value, and the use safety of the energy storage device can be improved.
Referring to fig. 3 to 6, fig. 3 is a schematic structural diagram of an end cap of an energy storage device disclosed in a second aspect of the embodiment of the present invention, fig. 4 is an exploded schematic structural diagram of the end cap of the energy storage device disclosed in the second aspect of the embodiment of the present invention, an end cap 2 of the energy storage device further disclosed in the second aspect of the present invention includes an end cap body 21, an explosion-proof valve 22, and the protection patch 1 described above, the end cap body 21 has a first surface 21a facing the same direction as the first surface 1a and a second surface 21b facing the same direction as the second surface 1b, the end cap body 21 is provided with an explosion-proof hole 211 penetrating through the first surface 21a and the second surface 21b, the explosion-proof valve 22 is disposed in the explosion-proof hole 211, and the protection patch 1 is disposed on the second surface 21b and covers the explosion-proof hole 211. It can be understood that the end cap 2 having the protection patch 1 described above can bring about the same or similar advantages, and specific reference is made to the foregoing description, and the description is omitted here.
For example, as shown in fig. 5 and 6, the explosion-proof valve 22 may include a body portion 221 and a connection portion 222 connected to the body portion 221, the connection portion 222 being connected to the end cap body 21, the body portion 221 being disposed corresponding to the explosion-proof hole 211 and covering the explosion-proof hole 211, a transparent region of the protection patch 1 being disposed corresponding to the body portion 221 of the explosion-proof valve 22, and an adhesive region of the protection patch 1 being disposed corresponding to the connection portion 222 of the explosion-proof valve 22, so that the explosion-proof valve 22 may be protected using the protection patch 1. By limiting the explosion-proof valve 22 to comprise the body part 221 corresponding to the explosion-proof hole 211 and the connecting part 222 used for connecting the end cover body 21, when the air pressure in the energy storage device reaches the preset explosion value of the explosion-proof valve 22, the body part 221 of the explosion-proof valve 22 can be opened by the air in the energy storage device, the transparent area of the protection patch 1 is subjected to explosion-proof pressure relief, meanwhile, because the connecting part 222 is connected to the end cover body 21, when the body part 221 is opened by the air in the energy storage device to perform explosion-proof pressure relief, the situation that the whole explosion-proof valve 22 is splashed out and other parts are damaged is avoided. And the transparent region of protection paster 1 corresponds the main blast region (being body portion 221) setting of explosion-proof valve 22, and the convenience is whether the main blast region of explosion-proof valve 22 takes place the inflation or is damaged through this transparent region observation to can in time inspect the state of explosion-proof valve 22, thereby ensure that explosion-proof valve 22 can normal use, with the safety in utilization of ensuring energy memory.
In some embodiments, the distance d from the protection patch 1 to the explosion-proof valve 22 in a direction perpendicular to the first surface 21a, such as the up-down direction in fig. 6, may be 0.80mm to 1.60mm, for example, the distance d from the protection patch 1 to the explosion-proof valve 22 is 0.80mm, 0.90mm, 1.00mm, 1.10mm, 1.20mm, 1.30mm, 1.40mm, 1.50mm, or 1.60mm, and the like. This is mainly considered: there may be foreign matter extrusion protection paster 1 in the direction of perpendicular to first surface 21a for protection paster 1 can receive pressure to take place elastic deformation along the direction towards explosion-proof valve 22, may extrude explosion-proof valve 22, through the range of controlling the distance d of protection paster 1 to explosion-proof valve 22 at 0.80mm ~ 1.60mm, can avoid explosion-proof valve 22 to receive the extrusion because of protection paster 1 is extruded by the foreign matter, protect explosion-proof valve 22, thereby be favorable to improving explosion-proof valve 22's life.
In some embodiments, as shown in fig. 5 and fig. 6, the second surface 21b is recessed in the end cap body 21 to form a sinking groove 212, the sinking groove 212 is communicated with the explosion-proof hole 211, the protection patch 1 is disposed in the sinking groove 212, and the first surface 1a of the protection patch 1 is attached to the bottom surface 2121 of the sinking groove 212. The sink 212 can define the installation position of the protection patch 1 on the end cover body 21, so as to ensure that the protection patch 1 can be arranged corresponding to the explosion-proof valve 22, and therefore the protection patch 1 can effectively protect the explosion-proof valve 22; on the other hand, the protection patch 1 can be prevented from being protruded on the second surface 21b, so that the protection patch 1 is prevented from being damaged due to collision with other parts, that is, the protection patch 1 can be protected to a certain extent by using the sinking groove 212.
The first surface 1a includes a bonding region 101 bonded to the bottom surface 2121 of the sink groove 212, the area of the bonding region 101 is S3, the area of the bottom surface 2121 of the sink groove 212 is S4, S3/S4 is greater than or equal to 0.7 and less than or equal to 0.9, for example, S3/S4=0.7, 0.72, 0.75, 0.78, 0.8, 0..83, 0.85, 0.88, or 0.9. The ratio control of the area through the area of laminating region 101 and the area of the bottom surface 2121 of heavy groove 212 is in the scope of 0.7 ~ 0.9, make the area of laminating region 101 of protection paster 1 slightly less than the area of the bottom surface 2121 of heavy groove 212, the whole size that is favorable to making protection paster 1 can slightly be less than the whole size of heavy groove 212, thereby can guarantee that protection paster 1 can all be attached in heavy groove 212, be favorable to improving the attached effect of protection paster 1 in heavy groove 212, in order to ensure this protection paster 1's protective effect. If S3/S4 is less than 0.7, the area of the attachment region 101 of the protection patch 1 is too small relative to the bottom surface 2121 of the sinking groove 212, so that the overall size of the protection patch 1 is too small relative to the overall size of the sinking groove 212, and thus it is difficult to ensure that the center of the protection patch 1 approximately coincides with the center of the sinking groove 212 during attachment, which may cause eccentricity, resulting in too small attachment area of the protection patch 1 or poor attachment effect; if S3/S4 is greater than 0.9, the area of the attaching area 101 of the protection patch 1 is too large relative to the bottom surface 2121 of the sinking groove 212, so that the overall size of the protection patch 1 is too large relative to the overall size of the sinking groove 212, and therefore, no attaching gap exists between the outer peripheral surface of the protection patch 1 and the side wall surface of the sinking groove 212, the protection patch 1 cannot be completely attached in the sinking groove 212, but the protection patch 1 can be partially attached to the outside of the sinking groove 212, so that the attaching tightness between the protection patch 1 and the sinking groove 212 is influenced, and further the protection effect of the protection patch 1 is influenced.
Further, in a direction parallel to the first surface 21a, for example, in a left-right direction in fig. 6, a width b2 of the sinking groove 212 is 0.08mm to 0.15mm, for example, 0.08mm, 0.09mm, 0.10mm, 0.11mm, 0.12mm, 0.13mm, 0.14mm, or 0.15mm larger than a width b3 of the protection patch 1, so as to ensure that the protection patch 1 can be completely attached in the sinking groove 212, which is beneficial to improving an attaching effect of the protection patch 1 in the sinking groove 212, and ensuring a protection effect of the protection patch 1.
In some embodiments, the end cap 2 further includes a conductive member 23, such as a post, a flat cable electrically connected to the post, etc., the conductive member 23 is disposed on the end cap body 21; the protective patch 1 may be a circular patch, the diameter of the protective patch 1 is R, the ventilation through hole 11 may be a circular hole, and the shortest distance from the center of the ventilation through hole 11 to the conductive member 23 is D, wherein D/R is 0.55 ≦ D/R ≦ 0.85, such as D/R =0.55, 0.60, 0.65, 0.70, 0.75, 0.80, or 0.85, and the like. When the range defined by the relational expression is met, the situation that the explosion-proof valve 22 is directly lapped on the conductive component 23 to cause short circuit can be avoided when the explosion-proof valve 22 is exploded due to thermal runaway of a battery cell because the protection patch 1 and the explosion-proof valve 22 are too close to the conductive component 23. When the value is lower than the lower limit value defined by the relational expression, the protection patch 1 and the explosion-proof valve 22 are too close to the conductive component 23, so that the conductive component 23 is easily short-circuited, or the diameter of the protection patch 1 is too large, so that materials and space are wasted; when the pressure is higher than the upper limit value defined by the relation, the explosion-proof valve 22 is far away from the conductive component 23 due to the fact that the protection patch 1 and the explosion-proof valve 22 are far away from the middle part with concentrated pressure, and quick pressure relief is not facilitated, or the explosion of the explosion-proof valve is not facilitated due to the fact that the diameter of the protection patch 1 is too small.
Referring to fig. 7 and 8, fig. 7 is a schematic structural diagram of an energy storage device disclosed in a third aspect of the embodiment of the present invention, fig. 8 is an exploded schematic structural diagram of an energy storage device disclosed in the third aspect of the embodiment of the present invention, and an energy storage device is further disclosed in the embodiment of the third aspect of the present invention, where the energy storage device 3 has the end cap 2 as described above. It will be appreciated that the energy storage device 3 having the end cap 2 described above also has the full technical effect of the protective patch described above, since the end cap 2 has the full technical effect of the protective patch described above. That is, this energy memory 3 can avoid the protection paster perk or drop, and the protection explosion-proof valve does not receive the pollution, can also make explosion-proof valve in time explode simultaneously to ensure energy memory 3's safety in utilization. Since the above technical effects have been described in detail in the embodiments of the protection patch, they are not described herein again.
The energy storage device 3 in the present application may be, but is not limited to, a single battery, a battery module, a battery pack, an energy storage cabinet, an energy storage container system, and the like, wherein when the energy storage device 3 is a single battery, it may be a cylindrical battery, for example, as shown in fig. 7 and 8, the energy storage device 3 as a single battery may further include a housing 31 and an electric core 32, the housing 31 has a receiving cavity 31a, the receiving cavity 31a has an opening 31b communicated with an external space, the battery end cap 2 is connected to the housing 31 and closes the opening 31b, and the electric core 32 is disposed in the receiving cavity 31 a. When the energy storage device 3 is a battery pack, the energy storage device 3 as the battery pack may include a plurality of unit cells, and the plurality of unit cells may be connected in series or in parallel.
An embodiment of the fourth aspect of the present invention further discloses an electrical device (not shown), which has the energy storage device as described above. The electric device may be, but is not limited to, an electric vehicle, an electric bicycle, an industrial device (e.g., a machine tool), or a household device (e.g., an air conditioner, a television, etc.), and the energy storage device is used as an operation power source of the vehicle, the industrial device, or the household device, and is used for power demand of the electric vehicle, the electric bicycle, the industrial device, or the household device during starting and running. It can be understood that the electric device having the energy storage device has all the technical effects of the protection patch as described above, because the energy storage device has all the technical effects of the protection patch as described above. Namely, the consumer can avoid protecting the paster perk or drop, and the protection explosion-proof valve does not receive the pollution, can also make explosion-proof valve in time explode simultaneously to ensure the safety in utilization of battery. Since the above technical effects have been described in detail in the embodiments of the protection patch, they are not described herein again.
The protection patch, the end cap, the energy storage device and the electric equipment disclosed by the embodiment of the invention are described in detail, a specific embodiment is applied in the description to explain the principle and the implementation mode of the invention, and the description of the embodiment is only used for helping to understand the protection patch, the end cap, the energy storage device and the electric equipment and the core idea thereof; meanwhile, for a person skilled in the art, according to the idea of the present invention, the specific embodiments and the application range may be changed, and in summary, the content of the present specification should not be construed as a limitation to the present invention.
Claims (16)
1. The utility model provides a protection paster for protection energy memory' S explosion-proof valve, its characterized in that, protection paster has the first face that backs on the other and sets up and the second face, just be provided with on the protection paster and run through the first face with the ventilative through-hole of second face, ventilative through-hole is in the area on the first face is S1, the area of first face is S2, wherein, 0.5% is less than or equal to S1S 2 and is less than or equal to 5%.
2. The protective patch according to claim 1, wherein the protective patch comprises a transparent area on which the ventilation through-hole is provided and an adhesive area connected to the transparent area, the adhesive area surrounding the outside of the transparent area, the adhesive area being for adhesion with an end cap of the energy storage device;
the thickness of the transparent area is 0.125 mm-0.19 mm along the direction perpendicular to the first surface.
3. The protective patch according to claim 2, wherein the loop width of the adhesive area is 0.5mm to 1.5mm in a radial direction of the protective patch.
4. A protective patch according to claim 2 or 3, wherein the adhesive area has a peel strength of 75N/100mm to 120N/100mm.
5. A protective patch according to any one of claims 1-4, wherein the total mass of the protective patch is M,1.75 x 10 -4 (S2-S1)≤M≤2.66*10 -4 (S2-S1)。
6. A protective patch according to any one of claims 1-5, wherein said ventilation through hole is provided in the centre of the protective patch.
7. The protective patch according to any one of claims 1-5, wherein the shape of the protective patch and the shape of the air-permeable through hole are both regular shapes.
8. An end cap for an energy storage device, the end cap comprising:
the end cover comprises an end cover body, a first cover and a second cover, wherein the end cover body is provided with a first surface and a second surface which are opposite to each other, and the end cover body is provided with an explosion-proof hole which penetrates through the first surface and the second surface;
the explosion-proof valve is arranged in the explosion-proof hole; and
the protective patch according to any one of claims 1-7, wherein the protective patch is disposed on the second surface and covers the blast hole, the first surface is oriented in the same direction as the first surface, and the second surface is oriented in the same direction as the second surface.
9. The end cap of the energy storage device of claim 8, wherein the distance from the protective patch to the explosion-proof valve in a direction perpendicular to the first surface is 0.80mm to 1.60mm.
10. The end cap of the energy storage device as claimed in claim 8, wherein the second surface is recessed in the end cap body to form a sunken groove, the sunken groove is communicated with the explosion-proof hole, the protection patch is disposed in the sunken groove, and the first surface is attached to a bottom surface of the sunken groove.
11. The end cover of the energy storage device according to claim 10, wherein the first surface comprises a bonding region bonded to the bottom surface of the sink groove, the bonding region has an area S3, the bottom surface of the sink groove has an area S4, and S3/S4 is greater than or equal to 0.7 and less than or equal to 0.9.
12. An end cap for an energy storage device according to claim 10 or 11, wherein the width of the sink is 0.08mm to 0.15mm greater than the width of the protection patch in a direction parallel to the first surface.
13. An end cap for an energy storage device according to any one of claims 8 to 12, wherein the explosion-proof valve comprises a body portion and a connecting portion connected to the body portion, the connecting portion is connected to the end cap body, the body portion is arranged corresponding to the explosion-proof hole and covers the explosion-proof hole, and the transparent region of the protection patch covers the body portion.
14. An end cap for an energy storage device according to any of claims 8-13, wherein said end cap further comprises an electrically conductive member disposed on said end cap body;
the protection patch is a circular patch, the diameter of the protection patch is R, the ventilation through hole is a circular hole, the shortest distance from the center of the ventilation through hole to the conductive part is D, and D/R is more than or equal to 0.55 and less than or equal to 0.85.
15. An energy storage device having an end cap according to any one of claims 8 to 14.
16. An electrical consumer, characterized in that the electrical consumer has an energy storage device according to claim 15.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211451791.0A CN115693013A (en) | 2022-11-18 | 2022-11-18 | Protection paster, end cover, energy storage device and consumer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211451791.0A CN115693013A (en) | 2022-11-18 | 2022-11-18 | Protection paster, end cover, energy storage device and consumer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN115693013A true CN115693013A (en) | 2023-02-03 |
Family
ID=85054046
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202211451791.0A Withdrawn CN115693013A (en) | 2022-11-18 | 2022-11-18 | Protection paster, end cover, energy storage device and consumer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN115693013A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116207462A (en) * | 2023-03-30 | 2023-06-02 | 厦门海辰储能科技股份有限公司 | End cover assembly, energy storage device and electric equipment |
| CN117855740A (en) * | 2024-03-08 | 2024-04-09 | 蜂巢能源科技股份有限公司 | Battery and battery pack |
-
2022
- 2022-11-18 CN CN202211451791.0A patent/CN115693013A/en not_active Withdrawn
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116207462A (en) * | 2023-03-30 | 2023-06-02 | 厦门海辰储能科技股份有限公司 | End cover assembly, energy storage device and electric equipment |
| CN116207462B (en) * | 2023-03-30 | 2024-05-31 | 厦门海辰储能科技股份有限公司 | End cover assembly, energy storage device and electric equipment |
| CN117855740A (en) * | 2024-03-08 | 2024-04-09 | 蜂巢能源科技股份有限公司 | Battery and battery pack |
| CN117855740B (en) * | 2024-03-08 | 2024-05-24 | 蜂巢能源科技股份有限公司 | Battery and battery pack |
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