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CN-224232734-U - Battery pack box and battery pack

CN224232734UCN 224232734 UCN224232734 UCN 224232734UCN-224232734-U

Abstract

The application relates to a battery pack box body and a battery pack, wherein the battery pack box body is provided with a guide runner and a runner opening, the runner opening is communicated with the guide runner, the guide runner is used for limiting a guide direction for a heat exchange working medium to pass through, the runner opening is used for the heat exchange working medium to pass through along the guide direction, and the through-flow cross section area of the guide runner close to the runner opening is smaller than the through-flow cross section area of the guide runner far away from the runner opening. Through the technical scheme, the through-flow sectional area of the guide runner close to the runner opening is smaller than the through-flow sectional area of the guide runner far away from the runner opening, so that the flow of the heat exchange working medium of the guide runner close to the runner opening and the flow of the heat exchange working medium far away from the runner opening tend to be uniform, the heat exchange working medium with uniform flow can exchange heat with the battery cells of the battery packs at different positions, the heat exchange uniformity of the battery cells at all positions of the battery pack is improved, the phenomenon of nonuniform heat exchange of the battery pack is improved, and the service life of the battery pack is prolonged.

Inventors

  • Gan Yijie
  • LI ZHI
  • WAN ZHIFANG

Assignees

  • 浙江凌骁能源科技有限公司
  • 浙江零跑科技股份有限公司

Dates

Publication Date
20260512
Application Date
20250513

Claims (10)

  1. 1. A battery pack case (100), characterized in that the battery pack case (100) has: A guide flow passage (100 b) for defining a guide direction for the heat exchange medium, and A fluid passage opening (100 c) for the passage of a heat exchange medium along a guiding direction; wherein the runner port (100 c) communicates with the guide runner (100 b); Wherein the cross-sectional area of the guide runner (100 b) close to the runner port (100 c) is smaller than the cross-sectional area of the guide runner (100 b) far away from the runner port (100 c).
  2. 2. The battery pack case (100) according to claim 1, wherein, The guide flow passage (100 b) includes: A first type of guide flow channel (100 b 1) defining a first guide direction (F1) for the passage of the heat exchange medium; the flow passage (100 c) comprises: A flow passage inlet (100 c 1) for allowing the heat exchange medium to flow into the first type of guide flow passage (100 b 1) along a first guide direction (F1); along the first guiding direction (F1), the through-flow cross section area of the first-type guiding flow channel (100 b 1) is gradually increased.
  3. 3. The battery pack case (100) according to claim 2, wherein, The guide flow passage (100 b) includes: a second type of guide flow channel (100 b 2) defining a second guide direction (F2) for the passage of the heat exchange medium; the flow passage (100 c) comprises: A flow passage outlet (100 c 2) for the heat exchange working medium to flow out of the second type of guide flow passage (100 b 2) along a second guide direction (F2); Wherein, along the second guiding direction (F2), the through-flow sectional area of the second-type guiding flow channel (100 b 2) is in stepwise decreasing; The first type guide flow channel (100 b 1) is arranged opposite to the second type guide flow channel (100 b 2), and the first guide direction (F1) is opposite to the second guide direction (F2).
  4. 4. The battery pack case (100) according to claim 3, wherein, The battery pack case (100) includes: A first beam (110) provided with a first groove structure (110 a) for defining the first type of guide flow channel (100 b 1); a second beam (120) provided with a second groove structure (120 a) for defining the second type of guide flow channel (100 b 2); the battery pack case (100) further has a case bottom plane (130 a); The first beam (110) and the second beam (120) are oppositely arranged, and the vertical distance between the groove wall surface of the first groove structure (110 a) close to the bottom plane (130 a) and the bottom plane (130 a) is larger than the vertical distance between the groove wall surface of the second groove structure (120 a) close to the bottom plane (130 a) and the bottom plane (130 a).
  5. 5. The battery pack case (100) according to claim 4, wherein, The vertical distance between the groove wall surface of the first groove structure (110 a) which is far away from the box bottom plane (130 a) and the box bottom plane (130 a) is equal to the vertical distance between the battery cell (200) planes of the battery cells (200) which are far away from the box bottom plane (130 a).
  6. 6. The battery pack case (100) according to claim 4, wherein, The battery pack case (100) further includes: A base plate (130) connected to the first beam (110) and the second beam (120), respectively; Wherein the bottom plate (130) is located between the first beam (110) and the second beam (120).
  7. 7. A battery pack (10), characterized in that the battery pack (10) includes the battery pack case (100) as defined in any one of claims 1 to 6 and a battery cell (200), the battery cell (200) being accommodated in an in-case space of the battery pack case (100).
  8. 8. The battery pack (10) according to claim 7, wherein the battery pack (10) further comprises: A first type of barrier (310) located between two adjacent cells (200) of a first column; A second type of barrier (320) located between two adjacent cells (200) of a second column, and A third type of barrier (330) located between two adjacent cells (200) of a third column; The contact area between the first type of blocking piece (310) and the battery cell (200) is larger than the contact area between the second type of blocking piece (320) and the battery cell (200), and the contact area between the second type of blocking piece (320) and the battery cell (200) is larger than the contact area between the third type of blocking piece (330) and the battery cell (200).
  9. 9. The battery pack (10) according to claim 8, wherein, The first type of barrier (310) comprises: A first portion (311) attached to an edge surface of the battery cell (200), wherein a dimension of the first portion (311) along a first direction is a first dimension (L1); the second type of barrier (320) comprises: A second portion (321) attached to the edge surface of the battery cell (200), the second portion (321) having a second dimension (L2) along the first direction, and The third class of barriers (330) comprises: A third portion (331) attached to an edge surface of the battery cell (200), wherein a dimension of the third portion (331) along the first direction is a third dimension (L3); Wherein the first dimension (L1) is greater than the second dimension (L2), the second dimension (L2) is greater than the third dimension (L3), and the thickness of the first portion (311), the thickness of the second portion (321) and the thickness of the third portion (331) are equal.
  10. 10. The battery pack (10) according to claim 9, wherein, The first type of barrier (310) comprises: A fourth part (312) attached to the central surface of the cell (200); the second type of barrier (320) comprises: a fifth portion (322) attached to a central surface of the battery cell (200); Wherein the thickness of the fourth portion (312) is smaller than the thickness of the first portion (311), and the thickness of the fifth portion (322) is smaller than the thickness of the second portion (321).

Description

Battery pack box and battery pack Technical Field The application relates to the technical field of power batteries, in particular to a battery pack box and a battery pack. Background Cooling the battery pack can reduce the temperature of the power battery pack and prevent the occurrence of overheating or thermal runaway of the battery. In the related art, the battery pack has the phenomenon of uneven heat exchange, and the service life of the battery pack is influenced. Disclosure of utility model The embodiment of the application provides a battery pack box and a battery pack, which improve the heat exchange uniformity of the battery pack so as to at least partially solve the technical problems. In order to achieve the above object, according to a first aspect of the present application, there is provided a battery pack case having: a guide flow passage for defining a guide direction for the heat exchange medium to pass through, and The fluid passage opening is used for allowing the heat exchange working medium to pass along the guiding direction; wherein the flow passage opening is communicated with the guide flow passage; the through-flow sectional area of the guide runner, which is close to the runner port, is smaller than the through-flow sectional area of the guide runner, which is far away from the runner port. Optionally, the guide flow channel includes: A first type of guide flow channel defining a first guide direction for the passage of a heat exchange medium; The flow passage port includes: The runner inlet is used for allowing the heat exchange working medium to flow into the first type guide runner along a first guide direction; along the first guiding direction, the through-flow sectional area of the first type guiding flow channel is gradually increased. Optionally, the guide flow channel includes: A second type of guide flow channel defining a second guide direction for the heat exchange medium to pass through; The flow passage port includes: The runner outlet is used for allowing the heat exchange working medium to flow out of the second-class guide runner along a second guide direction; The through-flow sectional area of the second-type guide flow channel is gradually decreased along the second guide direction; The first type guide flow channel and the second type guide flow channel are arranged oppositely, and the first guide direction and the second guide direction are opposite. Optionally, the battery pack case includes: a first beam provided with a first channel structure for defining the first type of guide flow channel; a second beam provided with a second groove structure for defining the second type of guide flow channel; The battery pack box body is also provided with a box bottom plane; The first beam and the second beam are oppositely arranged, and the vertical distance between the groove wall surface of the first groove structure, which is close to the bottom plane of the box, and the bottom plane of the box is greater than the vertical distance between the groove wall surface of the second groove structure, which is close to the bottom plane of the box, and the bottom plane of the box. Optionally, a vertical distance between a wall surface of the first groove structure, which is far from the bottom surface of the case, and the bottom surface of the case is equal to a vertical distance between the battery cells, which are far from the bottom surface of the case, and a battery cell plane. Optionally, the battery pack case further includes: The bottom plate is respectively connected with the first beam and the second beam; Wherein the bottom plate is located between the first beam and the second beam. According to a second aspect of the present application, there is also provided a battery pack including the battery pack case as described above and a battery cell accommodated in an intra-case space of the battery pack case. Optionally, the battery pack further includes: a first type of barrier located between two adjacent cells of a first column; a second type of barrier member positioned between two adjacent cells of the second column, and A third type of barrier positioned between two adjacent cells of a third column; The contact area of the first type blocking piece and the battery cell is larger than that of the second type blocking piece and the battery cell, and the contact area of the second type blocking piece and the battery cell is larger than that of the third type blocking piece and the battery cell. Optionally, the first type of barrier comprises: The first part is attached to the edge surface of the battery cell, and the dimension of the first part along the first direction is a first dimension; the second type of barrier comprises: a second part attached to the edge surface of the battery cell and having a second dimension along the first direction, and The third class of barriers comprises: The third part is attached to the edge surface of the battery cell, and