WO2024103403A1 - 保护贴片、端盖、储能装置及用电设备 - Google Patents

保护贴片、端盖、储能装置及用电设备 Download PDF

Info

Publication number
WO2024103403A1
WO2024103403A1 PCT/CN2022/132952 CN2022132952W WO2024103403A1 WO 2024103403 A1 WO2024103403 A1 WO 2024103403A1 CN 2022132952 W CN2022132952 W CN 2022132952W WO 2024103403 A1 WO2024103403 A1 WO 2024103403A1
Authority
WO
WIPO (PCT)
Prior art keywords
explosion
protective patch
energy storage
end cover
storage device
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/CN2022/132952
Other languages
English (en)
French (fr)
Inventor
李茂松
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Xiamen Hithium Energy Storage Technology Co Ltd
Original Assignee
Xiamen Hithium Energy Storage Technology Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Xiamen Hithium Energy Storage Technology Co Ltd filed Critical Xiamen Hithium Energy Storage Technology Co Ltd
Priority to PCT/CN2022/132952 priority Critical patent/WO2024103403A1/zh
Publication of WO2024103403A1 publication Critical patent/WO2024103403A1/zh
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Images

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/10—Primary casings; Jackets or wrappings
    • H01M50/147—Lids or covers
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/10—Primary casings; Jackets or wrappings
    • H01M50/183—Sealing members
    • H01M50/186—Sealing members characterised by the disposition of the sealing members
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/30—Arrangements for facilitating escape of gases
    • H01M50/392—Arrangements for facilitating escape of gases with means for neutralising or absorbing electrolyte; with means for preventing leakage of electrolyte through vent holes

Definitions

  • the present application relates to the field of battery technology, and in particular to a protective patch, an end cover, an energy storage device and an electrical device.
  • the battery in the related art usually has an explosion-proof valve protection patch fixed to the battery end cover above the explosion-proof valve to prevent dust, electrolyte, etc. from contaminating the explosion-proof valve.
  • the battery in the related art is usually evacuated before filling, resulting in the pressure inside the explosion-proof hole being inconsistent with the pressure outside, causing the explosion-proof valve protection patch to lift up or even fall off, which may cause the electrolyte to flow into the explosion-proof hole and contaminate the explosion-proof valve.
  • the battery will produce side reaction gases during charging and discharging, and these gases will accumulate in the cavity between the explosion-proof valve and the explosion-proof valve protection patch, making it difficult to maintain the balance of air pressure inside and outside the explosion-proof valve, which may cause the explosion of the explosion-proof valve to be delayed, resulting in an explosion, posing certain safety hazards and greatly reducing the safety of the battery.
  • the embodiments of the present application disclose a protective patch, an end cover, an energy storage device and an electrical device, which can not only prevent the protective patch from warping or falling off and protect the explosion-proof valve from being contaminated, but also enable the explosion-proof valve to explode in time to ensure the safety of the energy storage device.
  • the first aspect of the present application discloses a protective patch for protecting an explosion-proof valve of an energy storage device, wherein the protective patch has a first surface and a second surface opposite to each other, and the protective patch is provided with a ventilation hole passing through the first surface and the second surface, the area of the ventilation hole on the first surface is S1, and the area of the first surface is S2, wherein 0.5% ⁇ S1/S2 ⁇ 5%.
  • the explosion-proof valve can be made to explode in time when the internal air pressure of the energy storage device reaches a preset explosion value, thereby improving the explosion accuracy of the explosion-proof valve, which is beneficial to improving the safety of use of the energy storage device.
  • the present application also limits the ratio of the area of the breathable through hole on the first side of the protective patch to the area of the first side to 0.5% to 5%, which can avoid the breathable through hole being too small and affecting the processing of the breathable through hole, and avoid the breathable through hole being too large and causing dust, powder, electrolyte, etc. to flow into the explosion-proof valve and pollute the explosion-proof valve. It can be seen that controlling the ratio of the area of the breathable through hole on the first side of the protective patch to the area of the first side within the above range can achieve the effect of balancing the internal and external air pressures, facilitate the processing of the breathable through hole, and ensure the protective effect of the protective patch at the same time.
  • the protective patch includes a transparent area and an adhesive area connected to the transparent area, the air-permeable through hole is arranged on the transparent area, the adhesive area surrounds the outside of the transparent area, and the adhesive area is used to bond with the end cover of the energy storage device; along the direction perpendicular to the first surface, the thickness of the transparent area is 0.125mm ⁇ 0.19mm.
  • the transparent area of the protective patch should crack together with the explosion-proof valve so that the gas in the energy storage device can be discharged to the outside. Based on this, if the thickness of the transparent area is too thick, the transparent area is not easy to crack, which will affect the explosion pressure relief of the explosion-proof valve and the explosion performance of the explosion-proof valve, making it difficult to achieve an effective explosion-proof effect, and thus easily increase the risk of explosion of the energy storage device; if the thickness of the transparent area is too thin, it will affect the protective performance of the protective patch, and it is easy to cause the electrolyte to penetrate into the explosion-proof valve when the energy storage device is filled with liquid, thereby contaminating the explosion-proof valve.
  • controlling the thickness of the transparent area within the range of 0.125mm to 0.19mm can take into account the protective performance of the protective patch while avoiding affecting the explosion performance of the explosion-proof valve, so as to ensure that the explosion-proof valve can be exploded in time when the internal air pressure reaches the preset explosion value, thereby helping to improve the safety of the energy storage device.
  • the ring width of the adhesive area is 0.5 mm to 1.5 mm.
  • the width of the adhesive area determines the connection reliability between the protective patch and the end cap of the energy storage device. If the width of the adhesive area is too small, the adhesive area and the end cap of the energy storage device will be insufficient, and the adhesiveness will be insufficient, resulting in the protective patch being loose.
  • the protective patch is easy to fall off, resulting in the explosion-proof valve losing protection, especially when the energy storage device is charging and discharging, the temperature of the energy storage device will rise to a higher temperature, causing the glue layer in the adhesive area to melt and reduce the viscosity of the glue layer.
  • the ring width of the adhesive area is too small, the melted part of the glue layer accounts for a large proportion of the total glue layer, which reduces the adhesion between the adhesive area and the end cover of the energy storage device, causing the protective patch to fall off easily, resulting in the explosion-proof valve losing protection; if the ring width of the adhesive area is too large, the area of the adhesive layer in the adhesive area will be larger than the area of the side of the end cover used for bonding with the adhesive area, so that a part of the adhesive layer will not be used, resulting in waste, or the area of the side of the end cover that needs to be bonded with the adhesive area will become larger accordingly, which will increase the adhesion area between the adhesive area and the end cover, and the adhesion will become stronger, which may affect the bursting pressure of the explosion-proof valve.
  • controlling the ring width of the adhesive area within the range of 0.5 mm to 0.15 mm can improve the bonding reliability of the protective patch and the end cover to ensure the protective performance of the protective patch while avoiding affecting the explosion performance of the explosion-proof valve to ensure that the explosion-proof valve can explode in time when the internal air pressure reaches the preset explosion value, thereby helping to improve the safety of the energy storage device.
  • the total mass of the protective patch is M, 1.75*10 -4 (S2-S1) ⁇ M ⁇ 2.66*10 -4 (S2-S1).
  • the thickness of the transparent area of the protective patch can be controlled within an appropriate range to avoid the thickness of the transparent area of the protective patch being too thick or too thin, thereby avoiding affecting the explosion performance of the explosion-proof valve while taking into account the protection performance of the protective patch, so as to ensure that the explosion-proof valve can explode in time when the internal air pressure reaches a preset explosion value, thereby facilitating the improvement of the safety of the energy storage device.
  • the peel strength of the adhesive area is 75N/100mm-120N/100mm.
  • the air permeable hole is arranged at the center of the protective patch, so that the distance from the air permeable hole to any position of the connection between the protective patch and the battery end cover can be roughly consistent, so that the adhesion force of the protective patch and the battery end cover when they are bonded together can be basically maintained uniform, thereby improving the bonding stability between the protective patch and the battery end cover, avoiding the protective patch from detaching from the battery end cover, and reducing the probability of failure of the protective patch.
  • the shape of the protective patch and the shape of the breathable through hole are both regular shapes, which can facilitate the processing of the protective patch and the breathable through hole.
  • the present application discloses an end cap of an energy storage device, the end cap comprising an end cap body, an explosion-proof valve, and a protective patch as described in the first aspect above, the end cap body having a first surface and a second surface opposite to each other, and the end cap body being provided with an explosion-proof hole penetrating the first surface and the second surface, the explosion-proof valve being provided at the explosion-proof hole, the protective patch being provided at the second surface and sealing the explosion-proof hole, the first surface being oriented in the same direction as the first surface, and the second surface being oriented in the same direction as the second surface.
  • the end cap having the protective patch described in the first aspect above also has all the beneficial effects of the protective patch described in the first aspect above, that is, the end cap having the protective patch described in the first aspect above can also prevent the protective patch from warping or falling off, protect the explosion-proof valve from being contaminated, and at the same time enable the explosion-proof valve to explode in time to ensure the safety of the energy storage device.
  • the distance from the protective patch to the explosion-proof valve is 0.80mm to 1.60mm. This is mainly due to the fact that: in the direction perpendicular to the first surface, there may be foreign matter squeezing the protective patch, so that the protective patch will be elastically deformed in the direction toward the explosion-proof valve under pressure, and may squeeze the explosion-proof valve.
  • the explosion-proof valve can be prevented from being squeezed due to the protective patch being squeezed by foreign matter, thereby protecting the explosion-proof valve and thus helping to increase the service life of the explosion-proof valve.
  • the second surface is recessed in the end cover body to form a groove, the groove is connected to the explosion-proof hole, the protective patch is arranged in the groove, and the first surface is attached to the bottom surface of the groove.
  • the groove can be used to define the installation position of the protective patch on the end cover body to ensure that the protective patch can correspond to the explosion-proof valve setting, so that the protective patch can effectively protect the explosion-proof valve 22;
  • the protective patch is arranged in the groove, which can avoid the protective patch from being convexly arranged on the second surface to avoid the protective patch from colliding with other components and being damaged, that is, the groove can be used to protect the protective patch to a certain extent.
  • the first surface includes a fitting area that fits with the bottom surface of the sink, the area of the fitting area is S3, the area of the bottom surface of the sink is S4, and 0.7 ⁇ S3/S4 ⁇ 0.9.
  • Such a design allows the area of the fitting region of the protective patch to be slightly smaller than the area of the bottom surface of the sink, which is beneficial for making the overall size of the protective patch slightly smaller than the overall size of the sink, thereby ensuring that the protective patch can be fully attached to the sink, which is beneficial for improving the attachment effect of the protective patch in the sink, thereby ensuring the protective effect of the protective patch. If S3/S4 is less than 0.7, the area of the bonding region of the protective patch is too small relative to the bottom surface of the sink, so that the overall size of the protective patch is too small relative to the overall size of the sink.
  • the width of the groove is 0.08 mm to 0.15 mm larger than the width of the protective patch to ensure that the protective patch can be completely attached to the groove, which is beneficial to improving the attachment effect of the protective patch in the groove to ensure the protective effect of the protective patch.
  • the explosion-proof valve includes a main body and a connecting portion connected to the main body, the connecting portion is connected to the end cover body, the main body is arranged corresponding to the explosion-proof hole and is sealed on the explosion-proof hole, and the transparent area of the protective patch covers the main body.
  • the transparent area of the protective patch corresponds to the main explosion area (i.e., the main body) of the explosion-proof valve, which is convenient for observing whether the main explosion area of the explosion-proof valve is expanded or damaged through the transparent area, so as to be able to check the state of the explosion-proof valve in time, thereby ensuring that the explosion-proof valve can be used normally, so as to ensure the safety of the use of the energy storage device.
  • the end cap further includes a conductive component, and the conductive component is disposed on the end cap body;
  • the protective patch is a circular patch, the diameter of the protective patch is R, the air-permeable through hole is a circular hole, and the shortest distance from the center of the air-permeable through hole to the conductive component is D, wherein 0.55 ⁇ D/R ⁇ 0.85.
  • the present application discloses an energy storage device, the energy storage device having an end cap as described in the second aspect above. It is understandable that, since the end cap described in the second aspect above has all the beneficial effects of the protective patch described in the first aspect above, the energy storage device having the end cap described in the second aspect above also has all the technical effects of the protective patch described in the first aspect above, that is, the energy storage device having the end cap described in the second aspect above can also prevent the protective patch from tilting or falling off, protect the explosion-proof valve from being contaminated, and at the same time can make the explosion-proof valve explode in time to ensure the safety of the energy storage device.
  • the present application discloses an electrical device, which has an energy storage device as described in the third aspect. It is understandable that, since the energy storage device described in the third aspect has all the beneficial effects of the protective patch described in the first aspect, the electrical device having the energy storage device described in the third aspect also has all the technical effects of the protective patch described in the first aspect, that is, the electrical device having the energy storage device described in the third aspect can also prevent the protective patch from tilting or falling off, protect the explosion-proof valve from being contaminated, and can also cause the explosion-proof valve to explode in time to ensure the safety of battery use.
  • the present invention has the following advantages:
  • the protective patch, end cover, energy storage device and electrical equipment provided in the embodiments of the present application have air-permeable holes on the protective patch, so that exhaust or air intake can be carried out through the air-permeable holes to achieve the effect of balancing the internal and external air pressures.
  • this can solve the problem of the protective patch tilting or falling off due to inconsistent internal and external air pressures, thereby reducing or even avoiding the situation where dust, powder, electrolyte, etc.
  • the present application also limits the ratio of the area of the breathable through hole on the first side of the protective patch to the area of the first side to 0.5% to 5%, which can avoid the breathable through hole being too small and affecting the processing of the breathable through hole, and avoid the breathable through hole being too large and causing dust, powder, electrolyte, etc. to flow into the explosion-proof valve and pollute the explosion-proof valve. It can be seen that controlling the ratio of the area of the breathable through hole on the first side of the protective patch to the area of the first side within the above range can achieve the effect of balancing the internal and external air pressures, facilitate the processing of the breathable through hole, and ensure the protective effect of the protective patch at the same time.
  • FIG1 is a schematic diagram of the structure of a protective patch disclosed in an embodiment of the present application.
  • FIG2 is a front view of the protective patch disclosed in the embodiment of the present application.
  • FIG3 is a schematic diagram of the structure of an end cover of an energy storage device disclosed in an embodiment of the present application.
  • FIG4 is a schematic diagram of the exploded structure of the end cover of the energy storage device in FIG3 ;
  • FIG5 is a cross-sectional view of the end cover of the energy storage device in FIG3 along the A-A direction;
  • FIG6 is a partial enlarged view of the M portion in FIG5;
  • FIG7 is a schematic diagram of the structure of the energy storage device disclosed in the embodiment of the present application.
  • FIG. 8 is a schematic diagram of the exploded structure of the energy storage device disclosed in an embodiment of the present application.
  • first means two or more.
  • the embodiment of the first aspect of the present application discloses a protective patch, which is used to be set corresponding to the explosion-proof valve of the energy storage device to reduce or prevent dust, powder, electrolyte, etc. from polluting the explosion-proof valve, so as to protect the explosion-proof valve.
  • the protective patch 1 provided in the embodiment of the present application can effectively protect the explosion-proof valve from being polluted by dust, powder, electrolyte, etc., and can also make the explosion-proof valve explode in time to ensure the safety of the energy storage device.
  • the explosion-proof valve provided in the embodiment of the present application may be an explosion-proof valve 22 on the end cover 2 of the energy storage device, that is, an explosion-proof hole 211 is provided on the end cover 2, and the explosion-proof valve 22 is provided in the explosion-proof hole 211.
  • 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 is connected to the end cover 2, the body portion 221 is provided corresponding to the explosion-proof hole 211 and is sealed on the explosion-proof hole 211, and the protective patch 1 is provided corresponding to the explosion-proof valve 22 to protect the explosion-proof valve 22.
  • the air pressure in the energy storage device reaches the preset burst value of the explosion-proof valve 22, the gas in the energy storage device will break open the body portion 221 of the explosion-proof valve 22 and the protective patch 1 to perform explosion-proof pressure relief.
  • the protective patch 1 provided in the embodiment of the present application, by opening a breathable through hole 11 on the protective patch 1, exhaust or intake of air can be performed through the breathable through hole 11 to achieve the effect of balancing the internal and external air pressures. In this way, on the one hand, the situation that the protective patch 1 is lifted or falls off due to inconsistent internal and external air pressures can be solved, thereby reducing or even avoiding the situation that the protective patch 1 fails and causes dust, powder, electrolyte, etc.
  • the explosion accuracy refers to the degree of closeness between the actual pressure received by the explosion-proof valve when it explodes and the preset explosion value of the pressure.
  • the present application also limits the ratio of the area of the air hole 11 on the first side 1a of the protective patch 1 to the area of the first side 1a to 0.5% ⁇ 5%, which can avoid the air hole 11 being too small and affecting the processing of the air hole 11, and avoid the air hole 11 being too large and causing dust, powder, electrolyte, etc. to flow into the explosion-proof valve and pollute the explosion-proof valve.
  • controlling the ratio of the area of the air hole 11 on the first side 1a of the protective patch 1 to the area of the first side 1a within the above range can achieve the effect of balancing the internal and external air pressures while facilitating the processing of the air hole 11 and ensuring the protective effect of the protective patch 1.
  • the shape of the protective patch 1 may be a regular shape or an irregular shape.
  • the shape of the protective patch 1 may be a circle, a square, a rectangle, a rhombus, a regular polygon, etc.
  • the shape of the breathable through hole 11 may also be a regular shape or an irregular shape.
  • the shape of the breathable through hole 11 may be a circle, a square, a rectangle, a rhombus, a regular polygon, etc.
  • the shape of the protective patch 1 and the shape of the breathable through hole 11 are both regular shapes, so as to facilitate the processing of the protective patch 1 and the breathable through hole 11.
  • the shape of the protective patch 1 and the shape of the breathable through hole 11 may both be circular.
  • the breathable hole 11 can be set at the center of the protective patch 1, that is, the center of the breathable hole 11 roughly coincides with the center of the protective patch 1, so that the distance from the breathable hole 11 to any position of the connection between the protective patch 1 and the end cover of the energy storage device can be roughly consistent, so that the adhesion force between the protective patch 1 and the end cover of the energy storage device when they are bonded together can be basically maintained uniform, thereby improving the bonding stability between the protective patch 1 and the end cover of the energy storage device, avoiding the protective patch 1 from detaching from the end cover of the energy storage device, and reducing the failure probability of the protective patch 1.
  • the protective patch 1 includes a transparent area 12 and an adhesive area 13 connected to the transparent area 12, the transparent area 12 is arranged corresponding to the main body of the explosion-proof valve, and the transparent area 12 is provided with the above-mentioned air-permeable through hole 11, the adhesive area 13 surrounds the outside of the transparent area 12, and the adhesive area 13 is used to bond with the end cover of the energy storage device to achieve the connection between the protective patch 1 and the end cover of the energy storage device.
  • the thickness h1 of the transparent area 12 can be 0.125mm ⁇ 0.19mm.
  • the thickness h1 of the transparent area 12 can 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 or 0.19mm, etc.
  • the transparent area 12 of the protective patch 1 should be cracked together with the main body of the explosion-proof valve so that the internal gas of the energy storage device can be discharged to the outside. Based on this, if the thickness of the transparent area 12 is too thick, the transparent area 12 is not easy to crack, which will affect the explosion pressure relief of the explosion-proof valve, affect the explosion performance of the explosion-proof valve, and it is difficult to play an effective explosion-proof effect, which is easy to increase the risk of explosion of the energy storage device; if the thickness of the transparent area 12 is too thin, it will affect the protective performance of the protective patch 1, and it is easier to cause the electrolyte to immerse in the explosion-proof valve when the energy storage device is filled, thereby contaminating the explosion-proof valve.
  • the thickness h1 of the transparent area 12 is controlled within the range of 0.125mm to 0.19mm, which can take into account the protective performance of the protective patch 1 while avoiding affecting the explosion performance of the explosion-proof valve, so as to ensure that the explosion-proof valve can be exploded in time when the internal air pressure reaches the preset explosion value, thereby helping to improve the safety of the energy storage device.
  • the area of the protective patch 1 corresponding to the main body of the explosion-proof valve is set as a transparent area 12, it is possible to observe whether the explosion-proof valve is swollen or damaged through the transparent area 12, so that the status of the explosion-proof valve can be checked in time; at the same time, it is also possible to observe whether electrolyte has penetrated into the explosion-proof valve, which is convenient for identifying whether electrolyte has penetrated into the explosion-proof valve.
  • the material of the protective patch 1 can be polyethylene terephthalate (PET), polyimide (PI), polyethylene (PE), polypropylene (PP), polymethyl methacrylate (PMMA), polytetrafluoroethylene (PTFE), polyvinyl chloride (PVC), polycarbonate (PC), etc.
  • the adhesive area 13 of the protective patch 1 is provided with a blue transparent adhesive layer, such as a single-sided adhesive layer, a substrate-free double-sided adhesive layer, or an equivalent adhesive layer, so as to achieve the connection between the adhesive area 13 and the end cover of the energy storage device through the adhesive layer.
  • the adhesive layer can be 3M467 double-sided adhesive or 3M468 double-sided adhesive, etc.
  • the total mass of the protective patch 1 is M, wherein 1.75*10 -4 (S2-S1) ⁇ M ⁇ 2.66*10 -4 (S2-S1).
  • the thickness of the transparent area 12 of the protective patch 1 can be controlled within an appropriate range to avoid the thickness of the transparent area 12 of the protective patch 1 being too thick or too thin. This allows the protective performance of the protective patch 1 to be taken into account while avoiding affecting the explosion performance of the explosion-proof valve, thereby ensuring that the explosion-proof valve can explode in time when the internal air pressure reaches a preset explosion value, thereby facilitating improving the safety of battery use.
  • the ring width b1 of the adhesive area 13 may be 0.5mm to 1.5mm.
  • the ring 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 or 1.5mm, etc.
  • the size of the ring width b1 of the adhesive area 13 determines the connection reliability between the protective 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 adhesion area between the adhesive area 13 and the end cover of the energy storage device will be insufficient, and the adhesion will be insufficient, causing the protective patch 1 to fall off easily, thereby causing the explosion-proof valve to lose protection. Especially when the energy storage device is charged and discharged, the temperature of the energy storage device will rise to a higher temperature, causing the adhesive layer of the adhesive area 13 to melt and reduce the viscosity of the adhesive layer.
  • the ring width of the adhesive area 13 is too small, the melted portion of the adhesive layer accounts for a large proportion of the total adhesive layer, making the protective patch 1 fall off easily, and the explosion-proof valve lose protection.
  • the adhesion of the adhesive area 13 and the end cover of the energy storage device is reduced, causing the protective patch 1 to fall off easily, thereby causing the explosion-proof valve to lose protection;
  • the ring width b1 of the adhesive area 13 is too large, the area of the adhesive layer of the adhesive area 13 will be larger than the area of the side of the battery end cover that is used to adhere to the adhesive area 13, so that a part of the adhesive layer will not be used, resulting in waste, or the area of the side of the battery end cover that is used to adhere to the adhesive area 13 will be correspondingly larger, which will cause the adhesion area of the adhesive area 13 and the battery end cover to increase, and the adhesion will become stronger, which may affect the bursting pressure of the explosion-proof valve.
  • the ring width b1 of the adhesive area 13 is controlled within the range of 0.5mm to 0.15mm, which can improve the bonding reliability of the protective patch 1 and the battery end cover, ensure the protection performance of the protective patch 1, and avoid affecting the bursting performance of the explosion-proof valve, so as to ensure that the explosion-proof valve can be burst in time when the internal air pressure reaches the preset bursting value, thereby helping to improve the safety of battery use.
  • the peel strength of the adhesive region 13 may be 75N/100mm-120N/100mm, for example, the peel strength of the adhesive region 13 is 75N/100mm, 80N/100mm, 85N/100mm, 90N/100mm, 95N/100mm, 100N/100mm, 105N/100mm, 115N/100mm or 120N/100mm, etc.
  • Controlling the peel strength of the adhesive region 13 within the range of 75N/100mm-120N/100mm can ensure the reliability of the bonding between the protective patch 1 and the end cover of the energy storage device, while avoiding the excessive peel strength of the adhesive region 13 affecting the explosion performance of the explosion-proof valve, so as to ensure that the explosion-proof valve can be exploded in time when the internal air pressure reaches the preset explosion value, thereby facilitating the use safety of the energy storage device.
  • Figure 3 is a schematic diagram of the structure of the end cover of the energy storage device disclosed in the second aspect of the embodiment of the present application.
  • Figure 4 is a schematic diagram of the structure of the end cover of the energy storage device disclosed in the second aspect of the embodiment of the present application.
  • the embodiment of the second aspect of the present application also discloses an end cover of an energy storage device.
  • the end cover 2 of the energy storage device includes an end cover body 21, an explosion-proof valve 22, and the protective patch 1 as described above.
  • the end cover 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, and the end cover body 21 is provided with an explosion-proof hole 211 that passes through the first surface 21a and the second surface 21b, the explosion-proof valve 22 is provided in the explosion-proof hole 211, and the protective patch 1 is provided on the second surface 21b and covers the explosion-proof hole 211. It can be understood that the end cover 2 with the protective patch 1 described above can bring the same or similar beneficial effects, which can be specifically referred to the description in the previous text and will not be repeated here.
  • the explosion-proof valve 22 may include a main body 221 and a connecting portion 222 connected to the main body 221, the connecting portion 222 is connected to the end cover body 21, the main body 221 is arranged corresponding to the explosion-proof hole 211 and sealed on the explosion-proof hole 211, the transparent area of the protective patch 1 is arranged corresponding to the main body 221 of the explosion-proof valve 22, and the adhesive area of the protective patch 1 is arranged corresponding to the connecting portion 222 of the explosion-proof valve 22, so that the protective patch 1 can be used to protect the explosion-proof valve 22.
  • the explosion-proof valve 22 By limiting the explosion-proof valve 22 to include a main body 221 corresponding to the explosion-proof hole 211 and a connecting portion 222 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 gas in the energy storage device will break open the main body 221 of the explosion-proof valve 22 and the transparent area of the protective patch 1 for explosion-proof pressure relief.
  • the connecting portion 222 is connected to the end cover body 21, when the main body 221 is broken open by the gas in the energy storage device for explosion-proof pressure relief, it can avoid the entire explosion-proof valve 22 from splashing out and causing damage to other parts.
  • the transparent area of the protective patch 1 is set corresponding to the main explosion area (i.e., the main body 221) of the explosion-proof valve 22, so that it is convenient to observe whether the main explosion area of the explosion-proof valve 22 is expanded or damaged through the transparent area, so as to be able to timely check the state of the explosion-proof valve 22, thereby ensuring that the explosion-proof valve 22 can be used normally, so as to ensure the safety of the use of the energy storage device.
  • the distance d from the protective patch 1 to the explosion-proof valve 22 may be 0.80 mm to 1.60 mm, for example, the distance d from the protective patch 1 to the explosion-proof valve 22 is 0.80 mm, 0.90 mm, 1.00 mm, 1.10 mm, 1.20 mm, 1.30 mm, 1.40 mm, 1.50 mm or 1.60 mm, etc.
  • the second surface 21b is recessed in the end cover body 21 to form a recessed groove 212
  • the recessed groove 212 is connected to the explosion-proof hole 211
  • the protective patch 1 is arranged in the recessed groove 212
  • the first surface 1a of the protective patch 1 is attached to the bottom surface 2121 of the recessed groove 212.
  • the arrangement of the recessed groove 212 can define the installation position of the protective patch 1 on the end cover body 21, so as to ensure that the protective patch 1 can be arranged corresponding to the explosion-proof valve 22, so that the protective patch 1 can effectively protect the explosion-proof valve 22; on the other hand, it can prevent the protective patch 1 from being convexly arranged on the second surface 21b, so as to prevent the protective patch 1 from colliding with other components and being damaged, that is, the recessed groove 212 can be used to provide a certain degree of protection for the protective patch 1.
  • the area of the fitting region 101 of the protective patch 1 can be slightly smaller than the area of the bottom surface 2121 of the groove 212, which is beneficial for making the overall size of the protective patch 1 slightly smaller than the overall size of the groove 212, thereby ensuring that the protective patch 1 can be fully attached to the groove 212, which is beneficial for improving the attachment effect of the protective patch 1 in the groove 212, thereby ensuring the protective effect of the protective patch 1.
  • the width b2 of the groove 212 is 0.08 mm to 0.15 mm larger than the width b3 of the protective patch 1, such as 0.08 mm, 0.09 mm, 0.10 mm, 0.11 mm, 0.12 mm, 0.13 mm, 0.14 mm or 0.15 mm, etc., to ensure that the protective patch 1 can be completely attached to the groove 212, which is beneficial to improving the attachment effect of the protective patch 1 in the groove 212, thereby ensuring the protective effect of the protective patch 1.
  • the end cap 2 further includes a conductive component 23, such as a pole, a wiring electrically connected to the pole, etc., and the conductive component 23 is provided on the end cap body 21;
  • the protective patch 1 and the explosion-proof valve 22 can be prevented from being too close to the conductive component 23, so that when the explosion-proof valve 22 explodes due to thermal runaway of the battery cell, the explosion-proof valve 22 can be prevented from directly overlapping the conductive component 23 to cause a short circuit.
  • the protection patch 1 and the explosion-proof valve 22 are too close to the conductive component 23, which may easily cause the conductive component 23 to short-circuit, or the diameter of the protection patch 1 is too large, wasting materials and space; and when it is higher than the upper limit value defined by the above relationship, the protection patch 1 and the explosion-proof valve 22 are too far away from the conductive component 23, causing the explosion-proof valve 22 to be away from the middle part where the pressure is concentrated, which is not conducive to rapid pressure relief, or the diameter of the protection patch 1 is too small, which is not conducive to the explosion of the explosion-proof valve.
  • Figure 7 is a schematic diagram of the structure of the energy storage device disclosed in the third aspect of the embodiment of the present application.
  • Figure 8 is a schematic diagram of the structural decomposition of the energy storage device disclosed in the third aspect of the embodiment of the present application.
  • the embodiment of the third aspect of the present application also discloses an energy storage device, and the energy storage device 3 has the end cover 2 as described above. It can be understood that the energy storage device 3 with the end cover 2 described above, since the end cover 2 has all the technical effects of the protective patch described above, the energy storage device 3 also has all the technical effects of the protective patch described above.
  • the energy storage device 3 can prevent the protective patch from tilting or falling off, protect the explosion-proof valve from being contaminated, and at the same time, it can also make the explosion-proof valve explode in time to ensure the safety of the use of the energy storage device 3. Since the above-mentioned technical effects have been described in detail in the embodiment of the protective patch, they will not be repeated here.
  • the energy storage device 3 in the present application may be, but is not limited to, a single cell, a battery module, a battery pack, an energy storage cabinet or an energy storage container system, etc., wherein, when the energy storage device 3 is a single cell, it may be a cylindrical battery.
  • the energy storage device 3 as a single cell may also include a shell 31 and a battery cell 32, wherein the shell 31 has a receiving cavity 31a, and the receiving cavity 31a has an opening 31b connected to the external space, and the battery end cover 2 is connected to the shell 31 and closes the opening 31b, and the battery cell 32 is arranged in the receiving cavity 31a.
  • the energy storage device 3 as a battery pack may include a plurality of single cells, and the plurality of single cells are connected in series or in parallel.
  • the embodiment of the fourth aspect of the present application also discloses an electric device (not shown), which has an energy storage device as described above.
  • the electric device may be, but is not limited to, an electric car, an electric bicycle, industrial equipment (such as a machine tool) or household equipment (such as an air conditioner, a television, etc.), etc., and the energy storage device is used as an operating power supply for automobiles, industrial equipment or household equipment, etc., for the start-up and operation of electric cars, electric bicycles, industrial equipment or household equipment, etc. Working power demand.
  • the electric device with the energy storage device described above since the energy storage device has all the technical effects of the protective patch described above, the electric device also has all the technical effects of the protective patch described above.
  • the electric device can prevent the protective patch from tilting or falling off, protect the explosion-proof valve from being contaminated, and can also make the explosion-proof valve explode in time to ensure the safety of battery use. Since the above-mentioned technical effects have been described in detail in the embodiment of the protective patch, they will not be repeated here.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Gas Exhaust Devices For Batteries (AREA)

Abstract

本申请公开了一种保护贴片、端盖、储能装置及用电设备，保护贴片具有朝向防爆阀设置的第一面以及背向第一面设置的第二面，且保护贴片上设置有贯穿第一面和第二面的透气通孔，透气通孔在第一面上的面积为S1，第一面的面积为S2，其中，0.5％≤S1/S2≤5％。本申请实施例提供的保护贴片、端盖、储能装置及用电设备，不仅能够避免保护贴片翘起或脱落，保护防爆阀不受到污染，同时还能使防爆阀及时爆破，以确保电池的使用安全性。

Description

保护贴片、端盖、储能装置及用电设备 技术领域
本申请涉及电池技术领域，尤其涉及一种保护贴片、端盖、储能装置及用电设备。
背景技术
相关技术中的电池为了保护防爆阀，通常会在防爆阀的上方设置有与电池端盖相固定的防爆阀保护贴片，以避免尘埃、电解液等对防爆阀造成污染。
然而，相关技术中的电池在注液前通常会抽真空，导致防爆孔内的压强和外界的压强不一致，导致防爆阀保护贴片会翘起，甚至脱落，从而有可能会导致电解液流入防爆孔内，污染防爆阀。而且电池在充放电时会产生副反应气体，这些气体会堆积在防爆阀和防爆阀保护贴片之间的腔体内，导致防爆阀内外气压难以维持平衡，从而有可能会导致防爆阀爆破不及时，发生爆炸，存在一定的安全隐患，极大地降低了电池的安全性。
发明内容
本申请实施例公开了一种保护贴片、端盖、储能装置及用电设备，不仅能够避免保护贴片翘起或脱落，保护防爆阀不受到污染，同时还能使防爆阀及时爆破，以确保储能装置的使用安全性。
为了实现上述目的，本申请第一方面公开了一种保护贴片，用于保护储能装置的防爆阀，所述保护贴片具有相背的第一面和第二面，且所述保护贴片上设置有贯穿所述第一面和所述第二面的透气通孔，所述透气通孔在所述第一面上的面积为S1，所述第一面的面积为S2，其中，0.5％≤S1/S2≤5％。
在本申请提供的保护贴片中，通过在保护贴片上开设透气通孔，从而可以通过该透气通孔进行排气或进气，以达到内外气压平衡的效果，这样一方面，能够解决因内外气压不一致而导致保护贴片翘起或脱落的情况，从而能够减少甚至避免保护贴片失效而导致尘埃、粉末、电解液等污染防爆阀的情况，有利于提高防爆阀的使用寿命；另一方面，能够使防爆阀在储能装置的内部气压达到预设爆破值时及时爆破，提高防爆阀的爆破准确性，从而有利于提高储能装置的使用安全性。
进一步地，本申请还限定透气通孔在保护贴片的第一面上的面积和第一面的面积的比值为0.5％～5％，能够避免透气通孔太小而影响透气通孔的加工，以及避免透气通孔太大而使尘埃、粉末、电解液等流入至防爆阀，污染防爆阀，由此可见，将透气通孔在保护贴片的第一面上的面积和第一面的面积的比值控制在上述范围内，能够在达到内外气压平衡的效果的同时，方便透气通孔的加工，同时还能确保保护贴片的保护效果。
作为一种可选的实施方式，在本申请第一方面的实施例中，所述保护贴片包括透明区域和连接于所述透明区域的胶粘区域，在所述透明区域上设置有所述透气通孔，所述胶粘区域环绕在所述透明区域的外侧，所述胶粘区域用于与储能装置的端盖粘接；沿垂直于所述第一面的方向上，所述透明区域的厚度为0.125mm～0.19mm。
应当知道的是，在防爆阀发生爆破时，保护贴片的透明区域应当和防爆阀一起开裂，以使储能装置内气体能够排放至外界，基于此，如果透明区域的厚度太厚，则透明区域不易开裂，从而会影响防爆阀爆破泄压，影响防爆阀的爆破性能，难以起到有效的防爆炸效果，进而容易增加储能装置发生爆炸的风险；如果透明区域的厚度太薄，则会影响保护贴片的保护性能，在储能装置注液时容易造成电解液浸入防爆阀，从而污染防爆阀。所以将透明区域的厚度控制在0.125mm～0.19mm的范围内，能够在兼顾保护贴片的保护性能的同时，避免影响防爆阀的爆破性能，以确保防爆阀在内部气压达到预设爆破值时能够及时爆破，从而有利于提高储能装置的使用安全性。
作为一种可选的实施方式，在本申请第一方面的实施例中，沿所述保护贴片的径向方向上，所述胶粘区域的环宽为0.5mm～1.5mm。
可以理解的是，胶粘区域的环宽的大小决定保护贴片和储能装置的端盖的连接可靠性，如果胶粘区域的环宽太小，则会导致胶粘区域和储能装置的端盖的贴附面积不足，贴附粘性不够，导致保护贴 片容易脱落，从而导致防爆阀失去保护，尤其是在储能装置充放电时，储能装置的温度会升高至较高的温度，导致胶粘区域的胶层融化，降低胶层的粘度，由于胶粘区域的环宽太小，胶层中被融化的部分占总胶层的比例较大，使得胶粘区域和储能装置的端盖的贴附粘性降低，导致保护贴片容易脱落，从而导致防爆阀失去保护；如果胶粘区域的环宽太大，则会导致胶粘区域的胶层的面积大于端盖用于与胶粘区域胶粘的一面的面积，使得胶层会多出一部分没有利用到，导致浪费，或者，需要端盖用于与胶粘区域胶粘的一面的面积对应的变大，这样会导致胶粘区域和端盖的贴附面积增大，贴附粘性变强，有可能会影响防爆阀的爆破压力。所以将胶粘区域的环宽控制在0.5mm～0.15mm的范围内，能够在提高保护贴片和端盖的粘接可靠度，以确保该保护贴片的保护性能的同时，避免影响防爆阀的爆破性能，以确保防爆阀在内部气压达到预设爆破值时能够及时爆破，从而有利于提高储能装置的使用安全性。
作为一种可选的实施方式，在本申请第一方面的实施例中，所述保护贴片的总质量为M，1.75*10 -4(S2-S1)≤M≤2.66*10 -4(S2-S1)，通过将保护贴片的总质量M控制在1.75*10 -4(S2-S1)～2.66*10 -4(S2-S1)的范围内，能够使保护贴片的透明区域的厚度控制在合适的范围内，以避免保护贴片的透明区域的厚度太厚或者太薄，从而能够在兼顾保护贴片的保护性能的同时，避免影响防爆阀的爆破性能，以确保防爆阀在内部气压达到预设爆破值时能够及时爆破，进而有利于提高储能装置的使用安全性。
作为一种可选的实施方式，在本申请第一方面的实施例中，所述胶粘区域的剥离强度为75N/100mm-120N/100mm。通过将胶粘区域的剥离强度控制在75N/100mm-120N/100mm的范围内，能够确保保护贴片和储能装置的端盖的粘接可靠度的同时，避免胶粘区域的剥离强度过强而影响防爆阀的爆破性能，以确保防爆阀在内部气压达到预设爆破值时能够及时爆破，从而有利于提高储能装置的使用安全性。
作为一种可选的实施方式，在本申请第一方面的实施例中，所述透气通孔设置于所述保护贴片的中心处，这样使得透气通孔到保护贴片和电池端盖的连接处的任意位置的距离可以大致保持一致，从而可以使保护贴片与电池端盖贴合粘接时的附着力基本保持均匀，提高保护贴片和电池端盖之间的粘接稳定性，避免保护贴片脱离电池端盖，以减少保护贴片的失效概率。
作为一种可选的实施方式，在本申请第一方面的实施例中，所述保护贴片的形状和所述透气通孔的形状均为规则形状，这样能够方便保护贴片和透气通孔的加工。
第二方面，本申请公开了一种储能装置的端盖，所述端盖包括端盖本体、防爆阀以及如上述第一方面所述的保护贴片，所述端盖本体具有相背的第一表面和第二表面，且所述端盖本体设置有贯穿所述第一表面和所述第二表面的防爆孔，所述防爆阀设置于所述防爆孔，所述保护贴片设置于所述第二表面并封盖于所述防爆孔，所述第一面与所述第一表面的朝向相同，所述第二面与所述第二表面的朝向相同。可以理解的是，具有上述第一方面所述的保护贴片的端盖也具有上述第一方面所述保护贴片的全部有益效果，即，具有上述第一方面所述的保护贴片的端盖，也能避免保护贴片翘起或脱落，保护防爆阀不受到污染，同时还能使防爆阀及时爆破，以确保储能装置的使用安全性。
作为一种可选的实施方式，在本申请第二方面的实施例中，在垂直于所述第一表面的方向上，所述保护贴片到所述防爆阀的距离为0.80mm～1.60mm。这主要是考虑到：在垂直于第一表面的方向上可能会有异物挤压保护贴片，使得保护贴片会受到压力沿朝向防爆阀的方向发生弹性形变，有可能会挤压防爆阀，通过将保护贴片到防爆阀的距离控制在0.80mm～1.60mm的范围内，能够避免防爆阀因保护贴片被异物挤压而受到挤压，保护防爆阀，从而有利于提高防爆阀的使用寿命。
作为一种可选的实施方式，在本申请第二方面的实施例中，所述第二表面凹陷于所述端盖本体以形成沉槽，所述沉槽与所述防爆孔连通，所述保护贴片设置于所述沉槽，且所述第一面贴合于所述沉槽的底面，这样一方面，能够利用沉槽限定出保护贴片在端盖本体上的安装位置，以确保该保护贴片 能够对应防爆阀设置，从而使得保护贴片可以对防爆阀22起到有效的保护；另一方面，保护贴片设置在沉槽中，能够避免保护贴片凸设在第二表面，以避免保护贴片与其他部件发生碰撞而遭到损坏，即，能够利用该沉槽对保护贴片起到一定的保护作用。
作为一种可选的实施方式，在本申请第二方面的实施例中，所述第一面包括与所述沉槽的底面贴合的贴合区域，所述贴合区域的面积为S3，所述沉槽的底面的面积为S4，0.7≤S3/S4≤0.9。
如此设计，使得保护贴片的贴合区域的面积可以略小于沉槽的底面的面积，有利于使保护贴片的整体尺寸可以略小于沉槽的整体尺寸，从而能够保证保护贴片可以全部贴附在沉槽内，有利于提高保护贴片在沉槽内的贴附效果，以确保该保护贴片的保护效果。如果S3/S4＜0.7，保护贴片的贴合区域的面积相对沉槽的底面太小，使得保护贴片的整体尺寸相对沉槽的整体尺寸太小，从而在贴合时，难以保证保护贴片的中心大致重合于沉槽的中心，有可能造成偏心，导致保护贴片的贴附面积过小或者贴附效果很差；如果S3/S4＞0.9，保护贴片的贴合区域的面积相对沉槽的底面太大，使得保护贴片的整体尺寸相对沉槽的整体尺寸太大，从而使得保护贴片的外周面和沉槽的侧壁面之前没有贴附空隙，无法保证保护贴片全部贴附于沉槽内，而是会使得保护贴片部分会贴到沉槽外，影响保护贴片和沉槽之间的贴合紧密性，进而影响保护贴片的保护效果。
作为一种可选的实施方式，在本申请第二方面的实施例中，在平行于所述第一表面的方向上，所述沉槽的宽度比所述保护贴片的宽度大0.08mm～0.15mm，以保证保护贴片可以完整贴附于沉槽内，有利于提高保护贴片在沉槽内的贴附效果，以确保保护贴片的保护效果。
作为一种可选的实施方式，在本申请第二方面的实施例中，所述防爆阀包括本体部和连接于所述本体部的连接部，所述连接部连接于所述端盖本体，所述本体部对应所述防爆孔设置并封盖于所述防爆孔，所述保护贴片的透明区域覆盖所述本体部。通过限定防爆阀包括对应防爆孔的本体部和用于连接端盖本体的连接部，当储能装置内的气压到达防爆阀的预设爆破值时，储能装置内的气体便会冲开的本体部、保护贴片的透明区域进行防爆泄压，同时由于连接部连接于端盖本体，能够在本体部被储能装置内的气体冲开进行防爆泄压时，避免整个防爆阀飞溅出去而对其他零部件造成损坏的情况。而保护贴片的透明区域对应防爆阀的主要爆破区域(即本体部)设置，方便通过该透明区域观察防爆阀的主要爆破区域是否发生膨胀或者存在破损，以便于能够及时检查防爆阀的状态，从而确保防爆阀可以正常使用，以确保储能装置的使用安全性。
作为一种可选的实施方式，在本申请第二方面的实施例中，所述端盖还包括导电部件，所述导电部件设于所述端盖本体；所述保护贴片为圆形贴片，所述保护贴片的直径为R，所述透气通孔为圆形孔，所述透气通孔的圆心到所述导电部件的最短距离为D，其中，0.55≤D/R≤0.85。当满足上述关系式限定的范围内时，能够避免保护贴片、防爆阀距离导电部件太近，以在电池的电芯热失控导致防爆阀爆破时，能够避免防爆阀直接搭接于导电部件导致出现短路的情况。
第三方面，本申请公开了一种储能装置，所述储能装置具有如上述第二方面所述的端盖。可以理解的是，由于上述第二方面所述的端盖具有上述第一方面所述的保护贴片的全部有益效果，则具有上述第二方面所述的端盖的储能装置也具有上述第一方面所述的保护贴片的全部技术效果，即，具有上述第二方面所述的端盖的储能装置，也能避免保护贴片翘起或脱落，保护防爆阀不受到污染，同时还能使防爆阀及时爆破，以确保储能装置的使用安全性。
第四方面，本申请公开了一种用电设备，所述用电设备具有如上述第三方面所述的储能装置。可以理解的是，由于上述第三方面所述的储能装置具有上述第一方面所述的保护贴片的全部有益效果，则具有上述第三方面所述的储能装置的用电设备也具有上述第一方面所述的保护贴片的全部技术效果，即，具有上述第三方面所述的储能装置的用电设备，也能避免保护贴片翘起或脱落，保护防爆阀不受到污染，同时还能使防爆阀及时爆破，以确保电池的使用安全性。
与现有技术相比，本申请的有益效果在于：
本申请实施例提供的保护贴片、端盖、储能装置及用电设备，通过在保护贴片上开设透气通孔，从而可以通过该透气通孔进行排气或进气，以达到内外气压平衡的效果，这样一方面，能够解决因内外气压不一致而导致保护贴片翘起或脱落的情况，从而能够减少甚至避免保护贴片失效而导致尘埃、粉末、电解液等污染防爆阀的情况，有利于提高防爆阀的使用寿命；另一方面，能够使防爆阀在内部气压达到预设爆破值时及时爆破，提高防爆阀的爆破准确性，从而有利于提高电池的使用安全性。
进一步地，本申请还限定透气通孔在保护贴片的第一面上的面积和第一面的面积的比值为0.5％～5％，能够避免透气通孔太小而影响透气通孔的加工，以及避免透气通孔太大而使尘埃、粉末、电解液等流入至防爆阀，污染防爆阀，由此可见，将透气通孔在保护贴片的第一面上的面积和第一面的面积的比值控制在上述范围内，能够在达到内外气压平衡的效果的同时，方便透气通孔的加工，同时还能确保保护贴片的保护效果。
附图说明
为了更清楚地说明本申请实施例中的技术方案，下面将对实施例中所需要使用的附图作简单地介绍，显而易见地，下面描述中的附图仅仅是本申请的一些实施例，对于本领域普通技术人员来讲，在不付出创造性劳动的前提下，还可以根据这些附图获得其他的附图。
图1是本申请实施例公开的保护贴片的结构示意图；
图2是本申请实施例公开的保护贴片的正视图；
图3是本申请实施例公开的储能装置的端盖的结构示意图；
图4是图3中的储能装置的端盖的分解结构示意图；
图5是图3中的储能装置的端盖沿A-A方向的剖视图；
图6是图5中的M处的局部放大图；
图7是本申请实施例公开的储能装置的结构示意图；
图8是本申请实施例公开的储能装置的分解结构示意图。
主要附图标记说明
1、保护贴片；1a、第一面；101、贴合区域；1b、第二面；11、透气通孔；12、透明区域；13、胶粘区域。
2、端盖；21、端盖本体；21a、第一表面；21b、第二表面；211、防爆孔；212、沉槽；2121、底面；22、防爆阀；221、本体部；222、连接部；23、导电部件。
3、储能装置；31、壳体；31a、容纳腔；31b、开口；32、电芯。
具体实施方式
下面将结合本申请实施例中的附图，对本申请实施例中的技术方案进行清楚、完整地描述，显然，所描述的实施例仅是本申请一部分实施例，而不是全部的实施例。基于本申请中的实施例，本领域普通技术人员在没有做出创造性劳动前提下所获得的所有其他实施例，都属于本申请保护的范围。
并且，上述部分术语除了可以用于表示方位或位置关系以外，还可能用于表示其他含义，例如术语“上”在某些情况下也可能用于表示某种依附关系或连接关系。对于本领域普通技术人员而言，可以根据具体情况理解这些术语在本申请中的具体含义。
此外，术语“第一”、“第二”等主要是用于区分不同的装置、元件或组成部分(具体的种类和构造可能相同也可能不同)，并非用于表明或暗示所指示装置、元件或组成部分的相对重要性和数量。除非另有说明，“多个”的含义为两个或两个以上。
下面将结合实施例和附图对本申请的技术方案作进一步的说明。
请参阅图1和图2，本申请第一方面的实施例公开了一种保护贴片，该保护贴片1用于与储能装置的防爆阀对应设置，以减小或防止尘埃、粉末、电解液等对防爆阀造成污染，以对防爆阀起到保护的作用。本申请实施例提供的保护贴片1能够有效地保护防爆阀不受到尘埃、粉末、电解液等的污染， 同时还能使防爆阀及时爆破，以确保储能装置的使用安全性。
应当理解的是，如图3和图4所示，本申请实施例提供的防爆阀可以为储能装置的端盖2上的防爆阀22，即，端盖2上设置有防爆孔211，防爆阀22设置于防爆孔211。具体地，该防爆阀22可以包括本体部221和连接于本体部221的连接部222，连接部222连接于端盖2，本体部221对应防爆孔211设置并封盖于防爆孔211，该保护贴片1对应防爆阀22设置，以保护防爆阀22。当储能装置内的气压到达防爆阀22的预设爆破值时，储能装置内的气体便会冲开防爆阀22的本体部221、保护贴片1进行防爆泄压。
在本申请实施例中，如图1和图2所示，该保护贴片1具有朝向防爆阀设置的第一面1a以及背向第一面1a设置的第二面1b，且保护贴片1上设置有贯穿第一面1a和第二面1b的透气通孔11，其中，该透气通孔11在第一面1a上的面积为S1，第一面1a的面积为S2，0.5％≤S1/S2≤5％，例如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％或5.0等。
在本申请实施例提供的保护贴片1中，通过在保护贴片1上开设透气通孔11，从而可以通过该透气通孔11进行排气或进气，以达到内外气压平衡的效果，这样，一方面，能够解决因内外气压不一致而导致保护贴片1翘起或脱落的情况，从而能够减少甚至避免保护贴片1失效而导致尘埃、粉末、电解液等污染防爆阀的情况，进而有利于提高防爆阀的使用寿命；另一方面，能够避免储能装置在充放电时产生的副反应气体堆积在防爆阀和保护贴片1之间的腔体内，从而有利于使得防爆阀在内部气压达到预设爆破值时能够及时爆破，提高防爆阀的爆破准确性，从而有利于提高储能装置的使用安全性。其中，爆破准确性指的是防爆阀发生爆破时受到的实际压力与压力预设爆破值的接近程度。
可以理解的是，如果透气通孔11太小，不利于透气通孔11的加工，如果透气通孔11太大，尘埃、粉末、电解液容易通过该透气通孔11进入到防爆阀，污染防爆阀，使得保护贴片1无法起到保护防爆阀的作用，所以本申请还限定透气通孔11在保护贴片1的第一面1a上的面积和第一面1a的面积的比值为0.5％～5％，能够避免透气通孔11太小而影响透气通孔11的加工，以及避免透气通孔11太大而使尘埃、粉末、电解液等流入至防爆阀，污染防爆阀，由此可见，将透气通孔11在保护贴片1的第一面1a上的面积和第一面1a的面积的比值控制在上述范围内，能够在达到内外气压平衡的效果的同时，方便透气通孔11的加工，同时还能确保保护贴片1的保护效果。
在本实施例中，保护贴片1的形状可为规则形状或不规则形状，当保护贴片1的形状为规则形状时，保护贴片1的形状可为圆形、正方形、长方形、菱形、正多边形等。同样地，透气通孔11的形状也可为规则形状或不规则形状，当透气通孔11的形状为规则形状时，透气通孔11的形状可为圆形、正方形、长方形、菱形、正多边形等。优选地，保护贴片1的形状和透气通孔11的形状均为规则形状，以便于保护贴片1和透气通孔11的加工。示例性地，保护贴片1的形状和透气通孔11的形状均可为圆形。
一些实施例中，透气通孔11可以设置于保护贴片1的中心处，即，透气通孔11的中心与保护贴片1的中心大致重合，这样使得透气通孔11到保护贴片1和储能装置的端盖的连接处的任意位置的距离可以大致保持一致，从而可以使保护贴片1与储能装置的端盖贴合粘接时的附着力基本保持均匀，提高保护贴片1和储能装置的端盖之间的粘接稳定性，避免保护贴片1脱离储能装置的端盖，以减少保护贴片1的失效概率。
一些实施例中，如图1和图2所示，保护贴片1包括透明区域12和连接于透明区域12的胶粘区域13，透明区域12对应防爆阀的本体部设置，且在透明区域12上设置有前文所述的透气通孔11，胶粘区域13环绕在透明区域12的外侧，该胶粘区域13用于与储能装置的端盖粘接，以实现保护贴片1与储能装置的端盖的连接。且沿垂直于第一面1a的方向上，例如沿图2中的上下方向上，透明区域12的厚度h1可为0.125mm～0.19mm，例如透明区域12的厚度h1可为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或0.19mm等。
应当知道的是，在防爆阀发生爆破时，保护贴片1的透明区域12应当和防爆阀的本体部一起开裂，以使储能装置的内气体能够排放至外界，基于此，如果透明区域12的厚度太厚，则透明区域12不易开裂，从而会影响防爆阀的爆破泄压，影响防爆阀的爆破性能，难以起到有效的防爆炸效果，进而容易增加储能装置的发生爆炸的风险；如果透明区域12的厚度太薄，则会影响保护贴片1的保护性能，在储能装置的注液时更容易造成电解液浸入防爆阀，从而污染防爆阀。所以将透明区域12的厚度h1控制在0.125mm～0.19mm的范围内，能够在兼顾保护贴片1的保护性能的同时，避免影响防爆阀的爆破性能，以确保防爆阀在内部气压达到预设爆破值时能够及时爆破，从而有利于提高储能装置的使用安全性。
进一步地，由于保护贴片1对应防爆阀的本体部设置的区域为透明区域12，所以可以通过该透明区域12观察防爆阀是否发生膨胀或者存在破损，以便于能够及时检查防爆阀的状态；同时还可以观看是否有电解液浸入到防爆阀，便于识别是否有电解液渗入防爆阀。
可选地，保护贴片1的材质可以为聚对苯二甲酸乙二醇酯(PET)、聚酰亚胺(PI)、聚乙烯(PE)、聚丙烯(PP)、聚甲基丙烯酸甲酯(PMMA)、聚四氟乙烯(PTFE)、聚氯乙烯(PVC)、聚碳酸酯(PC)等。保护贴片1的胶粘区域13设有蓝色透明的胶层，例如单面胶层、无基材双面胶层或者其等效胶层，以通过该胶层实现胶粘区域13和储能装置的端盖的连接。优选地，该胶层可为3M467双面胶或3M468双面胶等。
一些实施例中，保护贴片1的总质量为M，其中，1.75*10 -4(S2-S1)≤M≤2.66*10 -4(S2-S1)，通过将保护贴片1的总质量M控制在1.75*10 -4(S2-S1)～2.66*10 -4(S2-S1)的范围内，能够使保护贴片1的透明区域12的厚度控制在合适的范围内，以避免保护贴片1的透明区域12的厚度太厚或者太薄，从而能够在兼顾保护贴片1的保护性能的同时，避免影响防爆阀的爆破性能，以确保防爆阀在内部气压达到预设爆破值时能够及时爆破，进而有利于提高电池的使用安全性。
一些实施例中，如图1和图2所示，沿保护贴片1的径向方向上，例如图1中的X方向，该胶粘区域13的环宽b1可为0.5mm～1.5mm，例如胶粘区域13的环宽b1为0.5mm、0.6mm、0.7mm、0.8mm、0.9mm、1.0mm、1.1mm、1.2mm、1.3mm、1.4mm或1.5mm等。
可以理解的是，胶粘区域13的环宽b1的大小决定保护贴片1和储能装置的端盖的连接可靠性，如果胶粘区域13的环宽b1太小，则会导致胶粘区域13和储能装置的端盖的贴附面积不足，贴附粘性不够，导致保护贴片1容易脱落，从而导致防爆阀失去保护，尤其是在储能装置充放电时，储能装置的温度会升高至较高的温度，导致胶粘区域13的胶层融化，降低胶层的粘度，由于胶粘区域13的环宽太小，胶层中被融化的部分占总胶层的比例较大，使得胶粘区域13和储能装置的端盖的贴附粘性降低，导致保护贴片1容易脱落，从而导致防爆阀失去保护；如果胶粘区域13的环宽b1太大，则会导致胶粘区域13的胶层的面积大于电池端盖用于与胶粘区域13胶粘的一面的面积，使得胶层会多出一部分没有利用到，导致浪费，或者，需要电池端盖用于与胶粘区域13胶粘的一面的面积对应的变大，这样会导致胶粘区域13和电池端盖的贴附面积增大，贴附粘性变强，有可能会影响防爆阀的爆破压力。所以将胶粘区域13的环宽b1控制在0.5mm～0.15mm的范围内，能够在提高保护贴片1和电池端盖的粘接可靠度，以确保保护贴片1的保护性能的同时，避免影响防爆阀的爆破性能，以确保防爆阀在内部气压达到预设爆破值时能够及时爆破，从而有利于提高电池的使用安全性。
示例性地，该胶粘区域13的剥离强度可为75N/100mm-120N/100mm，例如胶粘区域13的剥离强度为75N/100mm、80N/100mm、85N/100mm、90N/100mm、95N/100mm、100N/100mm、105N/100mm、115N/100mm或120N/100mm等。将胶粘区域13的剥离强度控制在75N/100mm-120N/100mm的范围内，能够确保保护贴片1和储能装置的端盖的粘接可靠度的同时，避免胶粘区域13的剥离强度过强而 影响防爆阀的爆破性能，以确保防爆阀在内部气压达到预设爆破值时能够及时爆破，从而有利于提高储能装置的使用安全性。
请参阅图3至图6，图3是本申请实施例第二方面公开的储能装置的端盖的结构示意图，图4是本申请实施例第二方面公开的储能装置的端盖的结构分解示意图，本申请第二方面的实施例还公开了一种储能装置的端盖，该储能装置的端盖2包括端盖本体21、防爆阀22以及如前文所述的保护贴片1，端盖本体21具有与第一面1a朝向相同的第一表面21a以及与第二面1b朝向相同的第二表面21b，且该端盖本体21设置有贯穿第一表面21a和第二表面21b的防爆孔211，防爆阀22设置于防爆孔211，保护贴片1设置于第二表面21b并封盖于防爆孔211。可以理解的，具有前文所述的保护贴片1的端盖2能够带来相同或者类似的有益效果，具体可参照前文的描述，此处不再赘述。
示例性地，如图5和图6所示，该防爆阀22可以包括本体部221和连接于本体部221的连接部222，连接部222连接于端盖本体21，本体部221对应防爆孔211设置并封盖于防爆孔211，该保护贴片1的透明区域对应防爆阀22的本体部221设置，保护贴片1的胶粘区域对应防爆阀22的连接部222设置，从而可利用该保护贴片1保护防爆阀22。通过限定防爆阀22包括对应防爆孔211的本体部221和用于连接端盖本体21的连接部222，当储能装置内的气压到达防爆阀22的预设爆破值时，储能装置内的气体便会冲开防爆阀22的本体部221、保护贴片1的透明区域进行防爆泄压，同时由于连接部222连接于端盖本体21，能够在本体部221被储能装置内的气体冲开进行防爆泄压时，避免整个防爆阀22飞溅出去而对其他零部件造成损坏的情况。而保护贴片1的透明区域对应防爆阀22的主要爆破区域(即本体部221)设置，方便通过该透明区域观察防爆阀22的主要爆破区域是否发生膨胀或者存在破损，以便于能够及时检查防爆阀22的状态，从而确保防爆阀22可以正常使用，以确保储能装置的使用安全性。
一些实施例中，在垂直于第一表面21a的方向上，例如图6中的上下方向，保护贴片1到防爆阀22的距离d可为0.80mm～1.60mm，例如保护贴片1到防爆阀22的距离d为0.80mm、0.90mm、1.00mm、1.10mm、1.20mm、1.30mm、1.40mm、1.50mm或1.60mm等。这主要是考虑到：在垂直于第一表面21a的方向上可能会有异物挤压保护贴片1，使得保护贴片1会受到压力沿朝向防爆阀22的方向发生弹性形变，有可能会挤压防爆阀22，通过将保护贴片1到防爆阀22的距离d控制在0.80mm～1.60mm的范围内，能够避免防爆阀22因保护贴片1被异物挤压而受到挤压，保护防爆阀22，从而有利于提高防爆阀22的使用寿命。
一些实施例中，如图5和图6所示，所述第二表面21b凹陷于端盖本体21以形成沉槽212，该沉槽212与防爆孔211连通，保护贴片1设置于沉槽212，且保护贴片1的第一面1a贴合于沉槽212的底面2121。沉槽212的设置，一方面，能够限定出保护贴片1在端盖本体21上的安装位置，以确保该保护贴片1能够对应防爆阀22设置，从而使得保护贴片1可以对防爆阀22起到有效的保护；另一方面，能够避免保护贴片1凸设在第二表面21b，以避免保护贴片1与其他部件发生碰撞而遭到损坏，即，能够利用该沉槽212对保护贴片1起到一定的保护作用。
其中，该第一面1a包括与沉槽212的底面2121贴合的贴合区域101，所述贴合区域101的面积为S3，沉槽212的底面2121的面积为S4，0.7≤S3/S4≤0.9，例如S3/S4＝0.7、0.72、0.75、0.78、0.8、0.83、0.85、0.88或0.9等。通过将贴合区域101的面积和沉槽212的底面2121的面积的比值控制在0.7～0.9的范围内，使得保护贴片1的贴合区域101的面积可以略小于沉槽212的底面2121的面积，有利于使保护贴片1的整体尺寸可以略小于沉槽212的整体尺寸，从而能够保证保护贴片1可以全部贴附在沉槽212内，有利于提高保护贴片1在沉槽212内的贴附效果，以确保该保护贴片1的保护效果。如果S3/S4＜0.7，保护贴片1的贴合区域101的面积相对沉槽212的底面2121太小，使得保护贴片1的整体尺寸相对沉槽212的整体尺寸太小，从而在贴合时，难以保证保护贴片1的中心大致重合于沉槽212的中心，有可能造成偏心，导致保护贴片1的贴附面积过小或者贴附效果很差；如果S3/S4 ＞0.9，保护贴片1的贴合区域101的面积相对沉槽212的底面2121太大，使得保护贴片1的整体尺寸相对沉槽212的整体尺寸太大，从而使得保护贴片1的外周面和沉槽212的侧壁面之前没有贴附空隙，无法保证保护贴片1全部贴附于沉槽212内，而是会使得保护贴片1部分会贴到沉槽212外，影响保护贴片1和沉槽212之间的贴合紧密性，进而影响保护贴片1的保护效果。
进一步地，在平行于第一表面21a的方向上，例如图6中的左右方向上，沉槽212的宽度b2比保护贴片1的宽度b3大0.08mm～0.15mm，例如0.08mm、0.09mm、0.10mm、0.11mm、0.12mm、0.13mm、0.14mm或0.15mm等，以保证保护贴片1可以完整贴附于沉槽212内，有利于提高保护贴片1在沉槽212内的贴附效果，以确保保护贴片1的保护效果。
一些实施例中，端盖2还包括导电部件23，例如极柱、电连接于极柱的排线等，所述导电部件23设于端盖本体21；保护贴片1可为圆形贴片，保护贴片1的直径为R，透气通孔11可为圆形孔，透气通孔11的圆心到导电部件23的最短距离为D，其中，0.55≤D/R≤0.85，例如D/R＝0.55、0.60、0.65、0.70、0.75、0.80或0.85等。当满足上述关系式限定的范围内时，能够避免保护贴片1、防爆阀22距离导电部件23太近，以在电池的电芯热失控导致防爆阀22爆破时，能够避免防爆阀22直接搭接于导电部件23导致出现短路的情况。而当低于上述关系式限定的下限值时，保护贴片1、防爆阀22距离导电部件23过近，易造成导电部件23短路，或者，保护贴片1的直径过大，浪费材料和空间；而当高于上述关系式限定的上限值时，保护贴片1、防爆阀22距离导电部件23过远，导致防爆阀22远离压力集中的中部，不利于快速泄压，或者，保护贴片1的直径过小，不利于防爆阀爆破。
请参阅图7和图8，图7是本申请实施例第三方面公开的储能装置的结构示意图，图8是本申请实施例第三方面公开的储能装置的结构分解示意图，本申请第三方面的实施例还公开了一种储能装置，所述储能装置3具有如前文所述的端盖2。可以理解的，具有前文所述的端盖2的储能装置3，由于该端盖2具有前文所述的保护贴片的全部技术效果，所以该储能装置3也具有前文所述的保护贴片的全部技术效果。即，该储能装置3能够避免保护贴片翘起或脱落，保护防爆阀不受到污染，同时还能使防爆阀及时爆破，以确保储能装置3的使用安全性。由于上述技术效果已在保护贴片的实施例中做了详细介绍，此处就不再赘述。
本申请中的储能装置3可以为但不局限于单体电池、电池模组、电池包、储能电柜或储能集装箱系统等，其中，当该储能装置3为单体电池时，其可为圆柱形电池，示例性地，如图7和图8所示，作为单体电池的储能装置3还可以包括壳体31以及电芯32，壳体31具有容纳腔31a，该容纳腔31a具有连通于外部空间的开口31b，电池端盖2连接于壳体31且封闭该开口31b，电芯32设于容纳腔31a内。而当储能装置3为电池包时，则作为电池包的储能装置3可以包括多个单体电池，多个单体电池串联连接或并联连接。
本申请第四方面的实施例还公开了一种用电设备(未图示)，该用电设备具有如前文所述的储能装置。该用电设备可为但不局限于电动汽车、电动自行车、工业设备(如机床)或家用设备(如空调、电视等)等，则储能装置作为汽车、工业设备或家用设备等的操作电源，用于电动汽车、电动自行车、工业设备或家用设备等的启动、运行时的工作用电需求。可以理解的，具有前文所述的储能装置的用电设备，由于该储能装置具有前文所述的保护贴片的全部技术效果，所以该用电设备也具有前文所述的保护贴片的全部技术效果。即，所述用电设备能够避免保护贴片翘起或脱落，保护防爆阀不受到污染，同时还能使防爆阀及时爆破，以确保电池的使用安全性。由于上述技术效果已在保护贴片的实施例中做了详细介绍，此处就不再赘述。
以上对本申请实施例公开的保护贴片、端盖、储能装置及用电设备进行了详细介绍，本文中应用了具体个例对本申请的原理及实施方式进行了阐述，以上实施例的说明只是用于帮助理解本申请的储能装置及用电设备及其核心思想；同时，对于本领域的一般技术人员，依据本申请的思想，在具体实施方式及应用范围上均会有改变之处，综上，本说明书内容不应理解为对本申请的限制。

Claims (16)

  1. 一种保护贴片，用于保护储能装置的防爆阀，其特征在于，所述保护贴片具有相背的第一面设置和第二面，且所述保护贴片上设置有贯穿所述第一面和所述第二面的透气通孔，所述透气通孔在所述第一面上的面积为S1，所述第一面的面积为S2，其中，0.5％≤S1/S2≤5％。
  2. 根据权利要求1所述的保护贴片，其特征在于，所述保护贴片包括透明区域和连接于所述透明区域的胶粘区域，在所述透明区域上设置有所述透气通孔，所述胶粘区域环绕在所述透明区域的外侧，所述胶粘区域用于与所述储能装置的端盖粘接；
    沿垂直于所述第一面的方向上，所述透明区域的厚度为0.125mm～0.19mm。
  3. 根据权利要求2所述的保护贴片，其特征在于，沿所述保护贴片的径向方向上，所述胶粘区域的环宽为0.5mm～1.5mm。
  4. 根据权利要求2或3所述的保护贴片，其特征在于，所述胶粘区域的剥离强度为75N/100mm-120N/100mm。
  5. 根据权利要求1-4任一项所述的保护贴片，其特征在于，所述保护贴片的总质量为M，1.75*10 -4(S2-S1)≤M≤2.66*10 -4(S2-S1)。
  6. 根据权利要求1-5任一项所述的保护贴片，其特征在于，所述透气通孔设置于所述保护贴片的中心处。
  7. 根据权利要求1-5任一项所述的保护贴片，其特征在于，所述保护贴片的形状和所述透气通孔的形状均为规则形状。
  8. 一种储能装置的端盖，其特征在于，所述端盖包括：
    端盖本体，所述端盖本体具有相背的第一表面和第二表面，且所述端盖本体设置有贯穿所述第一表面和所述第二表面的防爆孔；
    防爆阀，所述防爆阀设置于所述防爆孔；以及
    如权利要求1-7任一项所述的保护贴片，所述保护贴片设置于所述第二表面并封盖于所述防爆孔，所述第一面与所述第一表面的朝向相同，所述第二面与所述第二表面的朝向相同。
  9. 根据权利要求8所述的储能装置的端盖，其特征在于，在垂直于所述第一表面的方向上，所述保护贴片到所述防爆阀的距离为0.80mm～1.60mm。
  10. 根据权利要求8所述的储能装置的端盖，其特征在于，所述第二表面凹陷于所述端盖本体以形成沉槽，所述沉槽与所述防爆孔连通，所述保护贴片设置于所述沉槽，且所述第一面贴合于所述沉槽的底面。
  11. 根据权利要求10所述的储能装置的端盖，其特征在于，所述第一面包括与所述沉槽的底面贴合的贴合区域，所述贴合区域的面积为S3，所述沉槽的底面的面积为S4，0.7≤S3/S4≤0.9。
  12. 根据权利要求10或11所述的储能装置的端盖，其特征在于，在平行于所述第一表面的方向上，所述沉槽的宽度比所述保护贴片的宽度大0.08mm～0.15mm。
  13. 根据权利要求8-12任一项所述的储能装置的端盖，其特征在于，所述防爆阀包括本体部和连接于所述本体部的连接部，所述连接部连接于所述端盖本体，所述本体部对应所述防爆孔设置并封盖于所述防爆孔，所述保护贴片的透明区域覆盖所述本体部。
  14. 根据权利要求8-13任一项所述的储能装置的端盖，其特征在于，所述端盖还包括导电部件，所述导电部件设于所述端盖本体；
    所述保护贴片为圆形贴片，所述保护贴片的直径为R，所述透气通孔为圆形孔，所述透气通孔的圆心到所述导电部件的最短距离为D，其中，0.55≤D/R≤0.85。
  15. 一种储能装置，其特征在于，所述储能装置具有如权利要求8-14任一项所述的端盖。
  16. 一种用电设备，其特征在于，所述用电设备具有如权利要求15所述的储能装置。
PCT/CN2022/132952 2022-11-18 2022-11-18 保护贴片、端盖、储能装置及用电设备 Ceased WO2024103403A1 (zh)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PCT/CN2022/132952 WO2024103403A1 (zh) 2022-11-18 2022-11-18 保护贴片、端盖、储能装置及用电设备

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/CN2022/132952 WO2024103403A1 (zh) 2022-11-18 2022-11-18 保护贴片、端盖、储能装置及用电设备

Publications (1)

Publication Number Publication Date
WO2024103403A1 true WO2024103403A1 (zh) 2024-05-23

Family

ID=91083505

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CN2022/132952 Ceased WO2024103403A1 (zh) 2022-11-18 2022-11-18 保护贴片、端盖、储能装置及用电设备

Country Status (1)

Country Link
WO (1) WO2024103403A1 (zh)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN119581782A (zh) * 2024-11-22 2025-03-07 蜂巢能源科技股份有限公司 电芯及电池包
CN119764775A (zh) * 2024-12-31 2025-04-04 蜂巢能源科技股份有限公司 盖板组件及电池
CN119812660A (zh) * 2024-12-25 2025-04-11 蜂巢能源科技股份有限公司 单体电池、电池包及用电装置
CN120089900A (zh) * 2025-05-06 2025-06-03 蜂巢能源科技股份有限公司 电芯保护组件及电芯

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5939217A (en) * 1996-10-29 1999-08-17 Sony Chemicals Corporation Battery and protecting element therefor
CN213546422U (zh) * 2020-11-16 2021-06-25 上海兰钧新能源科技有限公司 防爆阀保护贴片、二次电池和汽车
CN114188656A (zh) * 2022-01-05 2022-03-15 上海兰钧新能源科技有限公司 防爆阀保护贴片、电池顶盖及电池
CN217158530U (zh) * 2022-01-27 2022-08-09 宁德时代新能源科技股份有限公司 用于电池的防爆阀贴片、端盖组件、电池和用电装置
CN217719792U (zh) * 2022-02-17 2022-11-01 上海兰钧新能源科技有限公司 一种防爆阀保护贴片结构

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5939217A (en) * 1996-10-29 1999-08-17 Sony Chemicals Corporation Battery and protecting element therefor
CN213546422U (zh) * 2020-11-16 2021-06-25 上海兰钧新能源科技有限公司 防爆阀保护贴片、二次电池和汽车
CN114188656A (zh) * 2022-01-05 2022-03-15 上海兰钧新能源科技有限公司 防爆阀保护贴片、电池顶盖及电池
CN217158530U (zh) * 2022-01-27 2022-08-09 宁德时代新能源科技股份有限公司 用于电池的防爆阀贴片、端盖组件、电池和用电装置
CN217719792U (zh) * 2022-02-17 2022-11-01 上海兰钧新能源科技有限公司 一种防爆阀保护贴片结构

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN119581782A (zh) * 2024-11-22 2025-03-07 蜂巢能源科技股份有限公司 电芯及电池包
CN119812660A (zh) * 2024-12-25 2025-04-11 蜂巢能源科技股份有限公司 单体电池、电池包及用电装置
CN119764775A (zh) * 2024-12-31 2025-04-04 蜂巢能源科技股份有限公司 盖板组件及电池
CN120089900A (zh) * 2025-05-06 2025-06-03 蜂巢能源科技股份有限公司 电芯保护组件及电芯

Similar Documents

Publication Publication Date Title
WO2024103403A1 (zh) 保护贴片、端盖、储能装置及用电设备
US12294121B2 (en) End cover assembly, housing assembly, battery cell, battery, and electric equipment
US10985433B2 (en) Battery module having structure breaking connector by using venting gas
KR100959090B1 (ko) 안전성이 개선된 파우치형 이차전지
CN1280928C (zh) 电池组件
CN214898799U (zh) 端盖组件、电池及用电装置
KR20220105635A (ko) 배터리 셀, 배터리 모듈, 배터리 팩, 배터리 셀을 전원으로 사용하는 장치, 및 배터리셀 조립 방법
CN115693013A (zh) 保护贴片、端盖、储能装置及用电设备
US20130095355A1 (en) Battery module
WO2021012912A1 (zh) 顶盖组件、二次电池和使用电池的装置
CN216773367U (zh) 电池顶盖、电池及电池包
KR102056363B1 (ko) 전지 셀
KR101936058B1 (ko) 파우치형 이차전지의 실링방법
KR101082960B1 (ko) 우수한 내구성의 이차전지
CN102683760A (zh) 二次电池
CN108886122A (zh) 圆筒形电池
KR20160032590A (ko) 외장재 어셈블리와, 각형 이차 전지와, 각형 전지의 제조 방법
JP2013187530A (ja) 密閉型電気化学デバイス用防爆弁
KR20170012138A (ko) 이차전지용 캡조립체 및 그 이차전지
CN113258207A (zh) 一种电芯、电池模组及车辆
CN1753204A (zh) 用于锂二次电池的复合材料带和使用它的锂二次电池
EP2790245B1 (en) Rechargeable battery
KR20150062688A (ko) 배터리 셀, 그리고 이를 포함하는 배터리 모듈 및 배터리 팩
JP2014022129A (ja) リチウムイオン電池
KR20190049206A (ko) 이차 전지 및 이차 전지용 절연판

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 22965583

Country of ref document: EP

Kind code of ref document: A1

NENP Non-entry into the national phase

Ref country code: DE

122 Ep: pct application non-entry in european phase

Ref document number: 22965583

Country of ref document: EP

Kind code of ref document: A1

122 Ep: pct application non-entry in european phase

Ref document number: 22965583

Country of ref document: EP

Kind code of ref document: A1

32PN Ep: public notification in the ep bulletin as address of the adressee cannot be established

Free format text: NOTING OF LOSS OF RIGHTS PURSUANT TO RULE 112(1) EPC (EPO FORM 1205A DATED 27.10.2025)

122 Ep: pct application non-entry in european phase

Ref document number: 22965583

Country of ref document: EP

Kind code of ref document: A1