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EP-4064439-B1 - BATTERY, POWER UTILIZATION DEVICE, AND METHOD AND DEVICE FOR PREPARING BATTERY

EP4064439B1EP 4064439 B1EP4064439 B1EP 4064439B1EP-4064439-B1

Inventors

  • ZHAO, FENGGANG
  • YANG, Haiqi
  • HUANG, Xiaoteng
  • HONG, JIARONG
  • WANG, WENLI
  • HU, Langchao

Dates

Publication Date
20260513
Application Date
20201019

Claims (15)

  1. A battery (200), comprising: a battery cell (400) that comprises a pressure relief mechanism (6), and the pressure relief mechanism (6) is configured to be actuated when internal pressure or temperature of the battery cell (400) reaches a threshold, to discharge emissions and release the internal pressure; a box (201, 202), configured to accommodate the battery cell (400); a pipe (100), configured to condense a gas inside the box (201, 202) to form a condensate, wherein the pipe (100) accommodates a fire extinguishing medium, wherein the fire extinguishing medium passes through the pipe (100) and condenses the gas inside the box (201, 202) to form the condensate, and the pipe (100) is constructed to release the fire extinguishing medium when the pressure relief mechanism (6) is actuated, so that the fire extinguishing medium enters the battery cell (400); and a liquid collecting member (110), provided between the battery cell (400) and the pipe (100), and comprising a weak zone (130) constructed to allow the fire extinguishing medium to penetrate through the weak zone (130) to the battery cell (400) when the pressure relief mechanism (6) is actuated, wherein the liquid collecting member (110) is provided with a first accommodating portion facing the pipe (100), and the first accommodating portion is configured to collect the condensate.
  2. The battery (200) according to claim 1, wherein the first accommodating portion is configured as a depression (120), and at least one end of the depression (120) has an opening in central axis direction of the pipe (100), used for releasing the condensate out of the depression (120) through the opening.
  3. The battery (200) according to claim 2, wherein a plurality of battery cells (400) is provided and arranged, the depression (120) extends in an arrangement direction of the plurality of battery cells (400), and a plane on which the opening of the depression (120) is located is a side surface of an outermost battery cell (400) in the arrangement direction of the battery cells (400); or the plane on which the opening of the depression (120) is located is beyond the side surface of the outermost battery cell (400) in the arrangement direction.
  4. The battery (200) according to any one of claims 1 to 3, wherein the first accommodating portion is further configured to accommodate at least part of the pipe (100), so that the condensate condensed by the pipe (100) flows to the first accommodating portion.
  5. The battery (200) according to any one of claims 2 to 4, wherein the depression (120) is 1 mm to 5 mm in depth.
  6. The battery (200) according to any one of claims 1 to 5, wherein the liquid collecting member (110) is insulative, to prevent a short circuit in the battery cell (400).
  7. The battery (200) according to any one of claims 1 to 6, wherein the liquid collecting member (110) and the pipe (100) are connected in a bonding manner.
  8. The battery (200) according to any one of claims 1 to 7, wherein the weak zone (130) is configured as a through hole; or the weak zone (130) is configured as a structure that is destroyed when the pressure relief mechanism (6) is actuated to form a through hole.
  9. The battery (200) according to claim 1 or 8, wherein the weak zone (130) is provided on a surface of the depression (120) closer to the battery cell (400), so that the fire extinguishing medium and the condensate collected in the depression (120) flow through the weak zone (130) to the battery cell (400).
  10. The battery (200) according to claim 9, wherein the battery (200) further comprises a fastening member, and the fastening member is provided between the battery cell (400) and the pipe (100), so as to fasten the pipe (100) to the battery cell (400).
  11. The battery (200) according to claim 10, wherein the fastening member further comprises a plurality of buckles (140), the buckle (140) is configured to clamp the pipe (100), and the plurality of buckles (140) are arranged in the central axis direction of the pipe (100) and located on both sides of the weak zone (130), so as to prevent the fire extinguishing medium and condensate located between the buckles (140) from flowing out of a zone enclosed by the buckles (140) at the depression (120) along the central axis direction of the pipe (100).
  12. The battery (200) according to any one of claims 8 to 10, wherein the battery (200) further comprises a separator (160), and the separator (160) is provided between the liquid collecting member (110) and the pressure relief mechanism (6).
  13. The battery (200) according to claim 12, wherein the separator (160) is preferably provided with a second accommodating portion (161) at a zone corresponding to the pressure relief mechanism (6), and the liquid collecting member (110) is provided in the second accommodating portion (161).
  14. An electric apparatus, comprising the battery (200) according to any one of claims 1 to 13, wherein the battery (200) is configured to supply electrical energy.
  15. A method for preparing the battery of any of claims 1 to 13, comprising: providing a battery cell (400); providing a box (201, 202), wherein the box (201, 202) is configured to accommodate the battery cell (400); providing a pipe (100), wherein the pipe (100) is configured to condense a gas inside the box to form a condensate; and providing a liquid collecting member (110), wherein the liquid collecting member (110) is provided between the battery cell (400) and the pipe (100), the liquid collecting member (110) is provided with a first accommodating portion facing the pipe (100), and the first accommodating portion is configured to collect the condensate.

Description

TECHNICAL FIELD This application relates to the field of battery technologies, and in particular, to a battery, an electric apparatus, and a method and an apparatus for preparing battery. BACKGROUND A battery is a core component of an electric apparatus driven by electrical energy, and use safety of the battery is essential to ensure overall use safety of the apparatus. However, thermal runaway of the battery is a key factor threatening the use safety of the battery. In order to cope with a problem of thermal runaway of batteries, a pipe is typically added to a battery in the conventional technology to cool the battery in thermal runaway, to avoid spreading of the thermal runaway. However, the battery provided with the pipe is prone to a short circuit. US2015/287963A1 relates to a cell module including a battery pack in which a plurality of electrical cells are arranged; and a bottom plate member that supports the battery pack. The bottom plate member includes an ejector for ejecting a liquid on the bottom plate member in a direction intersecting in an arrangement direction of the electrical cells and in an extending direction of the bottom plate member. SUMMARY This application provides a battery, an electric apparatus, and a method and an apparatus for preparing battery, to collect a condensate resulting from a gas inside the battery condensed by the pipe to prevent the condensate from flowing in the battery and coming into contact with a charged structure to cause a short circuit in the battery. The first aspect of this application provides a battery as set out in claim 1. In some embodiments, the first accommodating portion is configured as a depression, and at least one end of the depression has an opening in a central axis direction of the pipe, used for releasing the condensate out of the depression through the opening. In some embodiments, a plurality of battery cells is provided and arranged, the depression extends in an arrangement direction of the plurality of battery cells, and a plane on which the opening of the depression is located is a side surface of an outermost battery cell in the arrangement direction; or the plane on which the opening of the depression is located is beyond the side surface of the outermost battery cell in the arrangement direction. In some embodiments, the first accommodating portion is further configured to accommodate at least part of the pipe, so that the condensate condensed by the pipe flows into the first accommodating portion. In some embodiments, the depression is 1 mm to 5 mm in depth. In some embodiments, the liquid collecting member is insulative, to prevent a short circuit in the battery cell. In some embodiments, the liquid collecting member and the pipe may be connected through bonding. The battery cell includes a pressure relief mechanism, and the pressure relief mechanism is configured to be actuated when internal pressure or temperature of the battery cell reaches a threshold, to discharge emissions and release the internal pressure; the pipe accommodates a fire extinguishing medium, the fire extinguishing medium passes through the pipe and condenses the gas inside the box to form the condensate, and the pipe is constructed to release the fire extinguishing medium when the pressure relief mechanism is actuated, so that the fire extinguishing medium enters the battery cell; andthe liquid collecting member includes a weak zone, where the weak zone is constructed to allow the fire extinguishing medium to penetrate through the weak zone to the battery cell when the pressure relief mechanism is actuated. In some embodiments, the weak zone is configured as a through hole; or the weak zone is configured as a structure that is destroyed when the pressure relief mechanism is actuated to form a through hole. In some embodiments, the weak zone is provided on a surface of the depression closer to the battery cell, so that the fire extinguishing medium and condensate collected in the depression flow through the weak zone to the battery cell. In some embodiments, the battery further includes a fastening member, and the fastening member is provided between the battery cell and the pipe, so as to fasten the pipe to the battery cell. In some embodiments, the fastening member further includes a plurality of buckles, where the buckle is configured to clamp the pipe, and the plurality of buckles are arranged in the central axis direction of the pipe and located on both sides of the weak zone, so as to prevent the fire extinguishing medium and condensate located between the buckles from flowing out of a zone enclosed by the buckles along the central axis direction of the pipe. In some embodiments, the battery further includes a separator, where the separator is provided between the liquid collecting member and the pressure relief mechanism. In some embodiments, the separator is provided with a second accommodating portion at a zone corresponding to the pressure relief mecha