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CN-224217627-U - Battery pack, vehicle body and vehicle

CN224217627UCN 224217627 UCN224217627 UCN 224217627UCN-224217627-U

Abstract

The battery pack comprises a box body, a battery assembly and a connecting glue unit, wherein the battery assembly comprises a plurality of battery monomers, the battery monomers are sequentially arranged along a first direction, the battery monomers comprise a shell and an end cover which are mutually connected, the end cover is arranged at the end part of the battery monomers along a second direction, the battery assembly is adhered to the box body along the third direction through the connecting glue unit, the connecting glue unit comprises middle connecting glue, two ends of the middle connecting glue along the second direction are respectively connected with edge connecting glue, the edge connecting glue continuously extends along the first direction and is connected with any two adjacent battery monomers, and the first direction, the second direction and the third direction are perpendicular to each other. The battery pack can avoid weld cracking of the battery monomers.

Inventors

  • CHEN HAIYUN
  • CHEN JUN

Assignees

  • 小米汽车科技有限公司

Dates

Publication Date
20260508
Application Date
20250527

Claims (10)

  1. 1. A battery pack, comprising: A case; The battery assembly comprises a plurality of battery cells, wherein the battery cells are sequentially arranged along a first direction, the battery cells comprise a shell and an end cover which are mutually connected, the end cover is arranged at the end part of the battery cells along a second direction, and The battery pack is adhered to the box body in the third direction through the adhesive connecting unit, the adhesive connecting unit comprises a middle adhesive connecting unit, the middle adhesive connecting unit is connected with edge adhesive connecting units at two ends of the second direction respectively, the edge adhesive connecting units continuously extend in the first direction and connect any two adjacent battery monomers, and the first direction, the second direction and the third direction are perpendicular to each other.
  2. 2. The battery pack according to claim 1, wherein the side connection glue comprises a main body connection glue and an auxiliary connection glue which are connected, the main body connection glue is connected between the box body and the battery cells, the end portions of the battery cells along the second direction are provided with brackets, and the auxiliary connection glue extends out of the battery cells along the second direction and is connected between the box body and the brackets.
  3. 3. The battery pack of claim 2, wherein a weld is provided between the housing and the end cap, the body and auxiliary connection adhesives collectively wrapping the weld.
  4. 4. A battery pack according to claim 3, wherein in the third direction, the bracket is located inside the weld, the side joint compound has a thickness in the third direction, and the auxiliary joint compound has a thickness greater than that of the main body joint compound so that an inflection between the auxiliary joint compound and the main body joint compound wraps the weld.
  5. 5. The battery pack according to any one of claims 1 to 4, wherein the battery assembly includes a protective cover, an electrode terminal is provided at an end of the battery cell in the second direction, and the protective cover is provided to the electrode terminal and serves to restrict the edge connection paste from contacting the electrode terminal.
  6. 6. The battery pack according to claim 5, wherein the protective cover is overlapped with the holder and has a blocking rubber plate protruding from the holder in a third direction, and the blocking rubber plate is disposed between the weld and the electrode terminal in the third direction and is adhered to the auxiliary connection adhesive.
  7. 7. The battery pack of claim 1, wherein the edge connection glue has a width in the second direction, the width of the edge connection glue being at least 70 mm-90 mm.
  8. 8. The battery pack according to claim 1, wherein at least 90% -95% of the projected area of the battery assembly is covered by the connection glue unit in the third direction.
  9. 9. A vehicle body comprising the battery pack according to any one of claims 1 to 8.
  10. 10. A vehicle comprising the battery pack according to any one of claims 1 to 8 or the vehicle body according to claim 9.

Description

Battery pack, vehicle body and vehicle Technical Field The disclosure relates to the technical field of battery packs, in particular to a battery pack, a vehicle body and a vehicle. Background In the related art, a battery pack includes a case and a battery pack, wherein the battery pack is generally adhered to the case by a connection adhesive. At present, the battery monomer in the battery assembly is easy to bear uneven force, so that the welding seam of the battery assembly is cracked. Disclosure of utility model To overcome the problems in the related art, the present disclosure provides a battery pack capable of avoiding weld cracking of battery cells. According to a first aspect of embodiments of the present disclosure, there is provided a battery pack including: A case; The battery assembly comprises a plurality of battery cells, wherein the battery cells are sequentially arranged along a first direction, the battery cells comprise a shell and an end cover which are mutually connected, the end cover is arranged at the end part of the battery cells along a second direction, and The battery pack is adhered to the box body in the third direction through the adhesive connecting unit, the adhesive connecting unit comprises a middle adhesive connecting unit, the middle adhesive connecting unit is connected with edge adhesive connecting units at two ends of the second direction respectively, the edge adhesive connecting units continuously extend along the first direction and connect any two adjacent battery cells, and the first direction, the second direction and the third direction are perpendicular to each other. Through above-mentioned technical scheme, in the battery package that this disclosure provided, the both ends of battery monomer along the second direction are provided with the welding seam generally, are provided with the welding seam between end cover and the casing promptly, therefore, when the tip atress of battery monomer along the second direction is uneven, cause the single welding seam fracture of battery easily. Here, because the middle part is connected gluey both sides along the second direction all are provided with the limit portion and is connected gluey, consequently, the limit portion is connected gluey and can be connected battery monomer in the tip of second direction, through setting up the limit portion and is connected gluey and set up to extend in succession along first direction, along the uninterrupted extension of first direction promptly, can make arbitrary adjacent two battery monomer tip all be connected through the limit portion connection gluey, from this, can balanced the atress of each battery monomer tip to avoid the single welding seam fracture of battery. In some possible embodiments, the edge connection glue comprises a main body connection glue and an auxiliary connection glue, wherein the main body connection glue is connected between the box body and the battery cell, a bracket is arranged at the end part of the battery cell along the second direction, and the auxiliary connection glue extends out of the battery cell along the second direction and is connected between the box body and the bracket. Therefore, the auxiliary connecting glue can be used for connecting the part, located outside the battery unit, of the box body, namely, the box body and the bracket, so that the connection strength between the battery assembly and the box body can be further improved. In some possible embodiments, a weld is provided between the housing and the end cap, and the main body joint compound and the auxiliary joint compound collectively encapsulate the weld. Therefore, on one hand, the welding seam can be effectively protected, and on the other hand, the welding seam can be further prevented from cracking. In some possible embodiments, in the third direction, the bracket is located inside the weld bead, the edge connecting glue has a thickness in the third direction, and the auxiliary connecting glue has a thickness greater than that of the main body connecting glue, so that an inflection between the auxiliary connecting glue and the main body connecting glue wraps the weld bead. Therefore, the inflection formed by the thickness difference of the auxiliary connecting glue and the main connecting glue can be utilized to wrap the weld joint of the battery monomer, and the structure is simple and easy to realize. In some possible embodiments, the battery assembly includes a protective cover, an electrode terminal is disposed at an end of the battery cell in the second direction, and the protective cover is disposed on the electrode terminal and serves to restrict the edge connection paste from contacting the electrode terminal. Therefore, the electrode terminal and the edge connecting glue can be prevented from contacting by the protective cover, for example, the connecting glue unit is prevented from overflowing to the electrode terminal during the glue pressing process