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EP-4415143-B1 - ENERGY-STORAGE APPARATUS AND ELECTRICITY-CONSUMPTION DEVICE

EP4415143B1EP 4415143 B1EP4415143 B1EP 4415143B1EP-4415143-B1

Inventors

  • XU, WEIDONG
  • XIONG, YONGFENG
  • WANG, FENG

Dates

Publication Date
20260506
Application Date
20231219

Claims (14)

  1. An energy-storage apparatus (1000), comprising: a housing (400) having an opening (410) and defining an accommodating cavity (420); an electrode assembly (200) accommodated in the accommodating cavity (420); and an end cover assembly (100) sealing the opening (410), wherein the end cover assembly (100) comprises a top cover (40) and a lower plastic assembly (30), and the lower plastic assembly (30) is disposed between the top cover (40) and the electrode assembly; and the top cover (40) comprises a first stimulus-response member (45), and the first stimulus-response member (45) is configured to deform in response to a pressure increase in the energy-storage apparatus (1000); the lower plastic assembly (30) at least comprises a first-lower-plastic-member body (11), the first-lower-plastic-member body (11) has a first surface (111) facing the end cover assembly (100) and a second surface (112) opposite to the first surface (111), the first-lower-plastic-member body (11) defines a first recess (18) and a first vent hole (186) penetrating through the first surface (111) and the second surface (112), and the first recess (18) is recessed from the second surface (112) to the first surface (111); and the first vent hole (186) is defined in a recess bottom-wall of the first recess (18), and penetrates through the recess bottom-wall and the first surface (111) in a thickness direction of the first-lower-plastic-member body (11), and the first vent hole (186) is opposite to the first stimulus-response member (45) in the thickness direction of the end cover assembly (100); a first connector (300a) connected between the end cover assembly (100) and the electrode assembly (200), a part of the first recess (18) being blocked by the first connector (300a), the rest of the first recess (18) exposed beyond the first connector (300a) forming a vent passage, and the vent passage being in communication with the first vent hole (186), wherein a first protective grid (16) is disposed in the first recess (18), the first protective grid (16) is connected to a recess sidewall of the first recess (18), and in a direction towards the second surface (112), the first protective grid (16) is located above the first vent hole (186); and the first protective grid (16) defines a first vent portion, the first vent portion is in communication with the first recess (18), a part of the first vent portion is blocked by the first connector (300a), and the vent passage comprises a part of the first vent portion exposed beyond the first connector (300a).
  2. The energy-storage apparatus (1000) of claim 1, wherein in a width direction of the first-lower-plastic-member body (11), a ratio of a dimension d2 of the first recess (18) to a dimension d1 of the first connector (300a) is 1.01 to 1.4; and/or the vent passage is located at two opposite sides of the first connector (300a) in a width direction of the first-lower-plastic-member body (11), or the vent passage is located at a side of the first connector (300a) in the width direction of the first-lower-plastic-member body (11).
  3. The energy-storage apparatus (1000) of claim 1, wherein a cross-sectional area of the vent passage is three-fifths to nine-tenths of a cross-sectional area of the first recess (18); and/or a cross-sectional area of the first vent hole (186) is three-fifths to nine-tenths of a cross-sectional area of the first recess (18).
  4. The energy-storage apparatus of claim 1, wherein a wall surface of a part of a recess sidewall of the first recess (18) facing the vent passage is an inclined surface, and the inclined surface is inclined from the second surface (112) to the first vent hole (186); and the wall surface of the part of the recess sidewall of the first recess (18) is inclined at an angle a of 5 degrees to 40 degrees.
  5. The energy-storage apparatus (1000) of claim 1, wherein the first vent portion of the first protective grid (16) comprises a first vent slot (163) and a second vent slot (164), and the first vent slot (163) is spaced apart from the second vent slot (164) in a width direction of the first-lower-plastic-member body (11); and a part of the first vent slot (163) close to the recess sidewall of the first recess (18) is exposed beyond the first connector (300a) and is in communication with the first recess (18), or a part of the second vent slot (164) close to the recess sidewall of the first recess (18) is exposed beyond the first connector (300a) and is in communication with the first recess (18); or the part of the first vent slot (163) close to the recess sidewall of the first recess (18) is exposed beyond the first connector (300a), and the part of the second vent slot (164) close to the recess sidewall of the first recess (18) is exposed beyond the first connector (300a).
  6. The energy-storage apparatus (1000) of claim 5, wherein the first protective grid (16) comprises a first divider (161) and a second divider (162), the first divider (161) and the second divider (162) both are connected to the recess sidewall of the first recess (18), the first divider (161) and the second divider (162) are disposed in an intersected manner and cooperatively define the first vent slot (163) and the second vent slot (164), and the first vent slot (163) is spaced apart from the second vent slot (164) by the second divider (162); and in the width direction of the first-lower-plastic-member body (11), a sum of a dimension of the first vent slot (163), a dimension of the second vent slot (164), and a dimension of the second divider (162) is greater than a width of the first connector (300a).
  7. The energy-storage apparatus (1000) of claim 1, further comprising a second connector (300b) disposed opposite to the first connector (300a); wherein the top cover (40) further comprises a second stimulus-response member (46); the lower plastic assembly (30) further comprises a second-lower-plastic-member body (21), the second-lower-plastic-member body (21) has a third surface (211) facing the end cover assembly (100) and a fourth surface (212) opposite to the third surface (211), the second-lower-plastic-member body (21) defines a second recess (28) and a second vent hole (286), and the second recess (28) is recessed from the fourth surface (212) to the third surface (211); the second vent hole (286) is defined in a recess bottom-wall of the second recess (28), and penetrates through the recess bottom-wall of the second recess (28) and the third surface (211) in a thickness direction of the second-lower-plastic-member body (21), and the second vent hole (286) is opposite to the second stimulus-response member (46) in the thickness direction of the end cover assembly (100); and the second connector (300b) is connected between the end cover assembly (100) and the electrode assembly (200), a part of the second recess (28) is blocked by the second connector (300b), the rest of the second recess (28) exposed beyond the second connector (300b) forms a vent passage, and the vent passage is in communication with the second vent hole (286).
  8. The energy-storage apparatus (1000) of claim 7, wherein in a width direction of the second-lower-plastic-member body (21), a ratio of a dimension d4 of the second recess (28) to a dimension d3 of the second connector (300b) is 1.01 to 1.4; and/or the vent passage is located at two opposite sides of the second connector (300b) in a width direction of the second-lower-plastic-member body (21), or the vent passage is located at a side of the second connector (300b) in the width direction of the second-lower-plastic-member body (21).
  9. The energy-storage apparatus (1000) of claim 7, wherein a cross-sectional area of the vent passage is three-fifths to nine-tenths of a cross-sectional area of the second recess (28); and/or a cross-sectional area of the second vent hole (286) is three-fifths to nine-tenths of a cross-sectional area of the second recess (28).
  10. The energy-storage apparatus (1000) of claim 7, wherein a wall surface of a part of a recess sidewall of the second recess (28) facing the vent passage is an inclined surface, and the inclined surface is inclined from the fourth surface (212) to the second vent hole (286); and the wall surface of the part of the recess sidewall of the second recess (28) is inclined at an angle b of 5 degrees to 40 degrees.
  11. The energy-storage apparatus (1000) of any one of claims 7 to 10, wherein a second protective grid (26) is disposed in the second recess (28), the second protective grid (26) is connected to a recess sidewall of the second recess (28), and in a direction towards the fourth surface (212), the second protective grid (26) is located above the second vent hole (286); and the second protective grid (26) defines a second vent portion, the second vent portion is in communication with the second recess (28), a part of the second vent portion is blocked by the second connector (300b), and the vent passage comprises a part of the second vent portion exposed beyond the second connector (300b).
  12. The energy-storage apparatus (1000) of claim 11, wherein the second vent portion of the second protective grid (26) comprises a third vent slot (263) and a fourth vent slot (264), and the third vent slot (263) is spaced apart from the fourth vent slot (264) in a width direction of the second-lower-plastic-member body (21); and a part of the third vent slot (263) close to the recess sidewall of the second recess (28) is exposed beyond the second connector (300b) and is in communication with the second recess (28), or a part of the fourth vent slot (264) close to the recess sidewall of the second recess (28) is exposed beyond the second connector (300b) and is in communication with the second recess (28); or the part of the third vent slot (263) close to the recess sidewall of the second recess (28) is exposed beyond the second connector (300b), and the part of the fourth vent slot (264) close to the recess sidewall of the second recess (28) is exposed beyond the second connector (300b).
  13. The energy-storage apparatus (1000) of claim 12, wherein the second protective grid (26) comprises a third divider (261) and a fourth divider (262), the third divider (261) and the fourth divider (262) are cross-connected to the recess sidewall of the second recess (28), and cooperatively define the third vent slot (263) and the fourth vent slot (264), and the third vent slot (263) is spaced apart from the fourth vent slot (264) by the fourth divider (262); and in the width direction of the second-lower-plastic-member body (21), a sum of a dimension of the third vent slot (263), a dimension of the fourth vent slot (264), and a dimension of the fourth divider (262) is greater than a width of the second connector (300b).
  14. An electricity-consumption device (1) comprising the energy-storage apparatus (1000) of any one of claims 1 to 13, wherein the energy-storage apparatus (1000) is configured to power the electricity-consumption device (1).

Description

TECHNICAL FIELD This disclosure relates to the field of energy storage technology, and in particular to an energy-storage apparatus and an electricity-consumption device. BACKGROUND With continuous development of new-energy technologies, application ranges of rechargeable batteries become wider and wider. For example, a stimulus-response member is disposed on a smooth aluminum member of an end cover assembly of a battery. When air pressure inside a cell reaches a certain value, the stimulus-response member can be flipped over to contact an upper conductive block, so that the battery is short-circuited to prevent the battery from being overcharged, thereby avoiding accidents such as battery explosion and fire. However, an existing battery is still prone to accidents such as battery explosion and fire. CN208127255U relates to a top cover assembly and a secondary battery. The top cover assembly includes a top cover plate, an insulator, a first electrode terminal, and a flip-flop. The insulator is fixed to a lower side of the top cover plate; the first electrode terminal is provided on the top cover plate and includes a first base located on the lower side of the insulator; the flip-flop is fixed to the top cover plate and is capable of being flipped when the flipping pressure is exceeded, so that the top cover plate is electrically connected to the first electrode terminal. The insulator is provided with a first recess on a side of the first base in a width direction, the opening of the first recess is backed away from the top cover plate, and the first recess is connected to a space between the flip-flop and the insulator. The secondary battery includes an electrode assembly, a housing, a first connecting piece, and said top cover assembly. The housing houses the electrode assembly and has an opening, and the top cover plate is secured to the housing and closes said opening. The electrode assembly includes a body and a first lug projecting from the body, the first connecting piece connecting the first lug to a first base of a first electrode terminal. CN114497836 relates to a full lug top cover assembly and a full lug battery, wherein the full lug battery comprises: a top cover sheet, a lower plastic sheet, a flip valve, a first connecting sheet and a second connecting sheet. A first countersink and a second countersink are projecting downwardly from the bottom of the top cover sheet, and the first countersink is provided with a flip hole running along a thickness direction, and the flip valve is installed in the flip hole. A first countersink and a second countersink are provided at the top of the lower plastic in a downwardly concave direction away from the top cover sheet, the first countersink is connected with the first countersink in a restricted manner, the second countersink is connected with the second countersink in a restricted manner, and the first countersink is provided with a flip through hole corresponding to the flip hole. The first connecting piece and the second connecting piece are connected to the bottom of the lower plastic, the first connecting piece includes a first assembly portion and a first pin connected at an angle, the portion of the first assembly portion facing the flip-through hole is concave and forms a third countersink, and a plurality of ventilation holes are provided through the third countersink. The full pole ear top cover assembly of the present invention has a quick positioning fit between the top cover piece and the lower plastic, and safety is guaranteed. SUMMARY The invention is defined by the independent claims. An energy-storage apparatus is provided in the present disclosure, which can ensure that gas in the energy-storage apparatus can smoothly flow below a stimulus-response member, and can solve a technical problem of affecting a function of the stimulus-response member due to unsmooth gas circulation. In a first aspect, an energy-storage apparatus is provided in the present disclosure. The energy-storage apparatus includes a housing, an electrode assembly, an end cover assembly, and a first connector. The housing has an opening and defines an accommodating cavity. The electrode assembly is accommodated in the accommodating cavity. The end cover assembly seals the opening. The end cover assembly includes a top cover and a lower plastic assembly. The lower plastic assembly is disposed between the end cover and the electrode assembly. The end cover includes the first stimulus-response member. The first stimulus-response member is configured to deform in response to a pressure increase in the energy-storage apparatus. The lower plastic assembly at least includes a first-lower-plastic-member body. The first-lower-plastic-member body has a first surface facing the end cover assembly and a second surface opposite to the first surface. The first-lower-plastic-member body defines a first recess and a first vent hole penetrating through the first surface and the second