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CN-224204271-U - Battery module cover plate

CN224204271UCN 224204271 UCN224204271 UCN 224204271UCN-224204271-U

Abstract

The utility model relates to the technical field of battery modules, and provides a battery module cover plate which comprises a cover plate body, wherein a groove and a first air bag are arranged on the inner side of the cover plate body, the groove is communicated with the first air bag through an inflation channel, a control seat capable of axially moving is arranged in the groove, the control seat is in sealing fit with the inner wall of the groove, and the moving stroke of the control seat is configured to drive the first air bag to expand through compressing gas in the groove. According to the utility model, through the cooperative design of the control seat and the first air bag, active inflation sealing is realized, and when the battery module shell is assembled, the mechanical force of the shell assembly is converted into the pneumatic energy in the air bag, so that the second sealing piece is tightly and uniformly attached to the sealing surface, and the utility model is particularly suitable for the scene of complex curved surfaces or uneven sealing surfaces, and the initial sealing reliability is obviously improved.

Inventors

  • TAO MINGQING
  • YANG JIAN
  • ZHU SHENGTAO

Assignees

  • 江苏怡联宝科技有限公司

Dates

Publication Date
20260505
Application Date
20250520

Claims (10)

  1. 1. A battery module cover plate, comprising a cover plate body (100), characterized in that: The inner side of the cover plate body (100) is provided with a groove (102) and a first air bag (200), and the groove (102) is communicated with the first air bag (200) through an inflation channel; A control seat (300) capable of axially moving is arranged in the groove (102), the control seat (300) is in sealing fit with the inner wall of the groove (102), and the moving stroke of the control seat is configured to drive the first air bag (200) to expand by compressing the air in the groove (102); The outer surface of the first air bag (200) is fixedly provided with a second sealing piece (201), and when the first air bag (200) is inflated, the second sealing piece (201) is pressed on the sealing surface of the battery module shell; And a water-swelling water-stop adhesive layer (202) is compounded on the contact surface of the second sealing piece (201), and the water-swelling water-stop adhesive layer (202) swells in volume to fill the sealing interface gap when contacting liquid.
  2. 2. The battery module cover according to claim 1, wherein one side of the control seat (300) is provided with a slope configured such that when the battery module housing is mounted in the cover body (100), an edge of the battery module housing contacts the slope and drives the control seat (300) to move into the groove (102).
  3. 3. The battery module cover plate of claim 2, wherein an elastic member (301) is disposed on a side of the control seat (300) facing away from the inclined surface, one end of the elastic member (301) is fixed on the inner wall of the groove (102), and the other end of the elastic member is connected with the control seat (300) for driving the control seat (300) to reset when the battery module housing is detached.
  4. 4. The battery module cover according to claim 1, wherein the edge of the cover body (100) is provided with a first sealing member (101), the first sealing member (101) has an annular structure and is in sealing contact with the battery module case, and the sealing pressure of the first sealing member (101) is independent of the second sealing member (201).
  5. 5. The battery module cover according to claim 1, further comprising a second air bag (400) mounted to the top wall of the cover body (100), the second air bag (400) being in sealing contact with the top of the battery module case.
  6. 6. The battery module cover plate of claim 5, wherein the cover plate body (100) is provided with a cavity (103), a piston (104) is arranged in the cavity (103), the piston (104) is in sealing fit with the inner wall of the cavity (103), the inner wall of the cavity (103) is provided with a through hole (106) and an air inlet hole, the air inlet hole is internally provided with a one-way valve (105), and the second air bag (400) is communicated with the cavity (103) through the through hole (106).
  7. 7. The battery module cover plate of claim 1, wherein the water-swellable water-stop adhesive layer (202) is a water-swellable water-stop adhesive tape.
  8. 8. The battery module cover according to claim 5, wherein the second air cell (400) and the first air cell (200) are both of a ring-shaped structure.
  9. 9. The battery module cover plate according to claim 1, wherein the air charging channel is an air charging pipe (203), one end of the air charging pipe is communicated with the groove (102), and the other end of the air charging pipe is connected with an air charging nozzle of the first air bag (200).
  10. 10. The battery module cover plate of claim 1, wherein the air charging channel is an air charging hole, one end of the air charging channel is communicated with the groove (102), and the other end of the air charging channel is connected with an air charging nozzle of the first air bag (200).

Description

Battery module cover plate Technical Field The utility model relates to the technical field of battery modules, in particular to a battery module cover plate. Background The battery module is a modular assembly formed by adding necessary circuits and control units to the battery pack. The design and structure of the battery module can be customized according to the needs, such as size, shape, capacity, function, etc. The battery module has the function of improving the combination density and reliability of the battery cells, and is convenient for the assembly, connection and management of the battery pack. The searched publication number is CN218632330U, which discloses a battery pack and an electric automobile. The battery pack comprises a lower shell, a battery module and a cover plate, wherein an inner cavity of the lower shell is divided into a battery cavity and a containing cavity by a first baffle, a cooling inlet and a cooling outlet are formed in the side wall of the lower shell, cooling medium can flow into the battery cavity from the cooling inlet and flow out from the cooling outlet, the containing cavity is used for containing a battery management unit, the battery module is placed in the battery cavity, the cooling medium can submerge and cool the battery module, and the cover plate is used for sealing the inner cavity of the lower shell. The existing battery module cover plate depends on a single sealing ring or plane compression joint, the cover plate is easy to generate local or whole slight deformation after being subjected to vibration or thermal cycle for a long time, at the moment, the sealing element on the cover plate is in sealing failure with the shell, and the sealing element cannot compensate the deformation. Disclosure of utility model In view of this, the utility model provides a battery module cover plate, which can realize active inflation sealing, when a battery module shell is assembled, the edge of the battery module cover plate pushes a control seat to compress groove gas through an inclined plane, the gas is injected into a first air bag through an inflation channel to drive a second sealing element to actively expand and compress a sealing surface of the shell, and the process converts mechanical force of the assembly of the shell into pneumatic energy in the air bag, so that the second sealing element is tightly and uniformly attached to the sealing surface, and the initial sealing reliability is improved. The technical scheme of the utility model is that the battery module cover plate comprises a cover plate body, wherein a groove and a first air bag are arranged on the inner side of the cover plate body, and the groove is communicated with the first air bag through an inflation channel; The groove is internally provided with a control seat capable of axially moving, the control seat is in sealing fit with the inner wall of the groove, and the moving stroke of the control seat is configured to drive the first air bag to expand by compressing the air in the groove; The outer surface of the first air bag is fixedly provided with a second sealing piece, and when the first air bag is inflated, the second sealing piece is pressed on the sealing surface of the battery module shell; And a water-swelling water-stop adhesive layer is compounded on the contact surface of the second sealing piece, and the water-swelling water-stop adhesive layer expands in volume to fill the gap of the sealing interface when contacting liquid. On the basis of the above technical solution, preferably, one side of the control seat is provided with a slope configured such that when the battery module housing is mounted in the cover plate body, the edge of the battery module housing contacts with the slope and drives the control seat to move into the groove. Still further preferably, an elastic piece is arranged on one side of the control seat, which is back to the inclined plane, and one end of the elastic piece is fixed on the inner wall of the groove, and the other end of the elastic piece is connected with the control seat and used for driving the control seat to reset when the battery module shell is detached. On the basis of the above technical scheme, preferably, the edge of the cover plate body is provided with a first sealing member which is of an annular structure and is in sealing contact with the battery module shell, and the sealing pressure of the first sealing member is independent of that of the second sealing member. On the basis of the technical scheme, the battery module further comprises a second air bag which is arranged on the top wall of the cover plate body and is in sealing contact with the top of the battery module shell. Still more preferably, the cover plate body is provided with a cavity, a piston is arranged in the cavity and is in sealing fit with the inner wall of the cavity, the inner wall of the cavity is provided with a through hole and an air inlet hole, the air i