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CN-122025904-A - Battery pack and vehicle comprising same

CN122025904ACN 122025904 ACN122025904 ACN 122025904ACN-122025904-A

Abstract

The present invention relates to a battery pack including a case, a battery module disposed in the case, and a thermal management system for heating and cooling the battery module. The thermal management system comprises an inlet and outlet flange which is a single piece assembled to the outer wall surface of the shell and comprises an inlet part and an outlet part which are mutually independent, wherein the inlet part and the outlet part are suitable for being connected with external pipelines, a plurality of first pipelines and at least one second pipeline, each of the plurality of first pipelines extends inside the shell and at least partially abuts against the surface of the battery module, the inlet part comprises a diversion cavity, the inlet end of each of the plurality of first pipelines penetrates through the wall of the shell to be communicated with the diversion cavity, and the outlet end of the at least one second pipeline penetrates through the wall to be communicated with the outlet part. The battery pack integrates the inlet part and the outlet part into one inlet and outlet flange, thereby reducing the number of parts and saving the cost and the volume of the parts.

Inventors

  • MAO XIAOPING
  • ZHAO WENPENG
  • JIN JIE
  • ZHANG CUICUI
  • YAO YUAN
  • HE YI

Assignees

  • 斯特兰蒂斯汽车集团

Dates

Publication Date
20260512
Application Date
20241111

Claims (9)

  1. 1. A Battery Pack (BP) comprising a housing (10), a battery module (20) arranged in the housing (10), and a thermal management system for heating and cooling the battery module (20), characterized in that the thermal management system comprises: An inlet flange (60), the inlet flange (60) being a single piece fitted to the outer wall surface (12) of the housing (10) and comprising an inlet portion (61) and an outlet portion (62) independent from each other, the inlet portion (61) being adapted to be connected to an external input pipe and the outlet portion (62) being adapted to be connected to an external output pipe, and -A plurality of first ducts (30) and at least one second duct (40), each first duct (30) of the plurality of first ducts (30) and the at least one second duct (40) extending inside the housing (10) and at least partially against a surface of the battery module (20); Wherein the inlet portion (61) comprises a shunt cavity (610), an inlet end (301) of each first conduit (30) of the plurality of first conduits (30) communicates with the shunt cavity (610) through a wall (11) of the housing (10), and an outlet end (402) of the at least one second conduit (40) communicates with the outlet portion (62) through the wall (11).
  2. 2. The Battery Pack (BP) according to claim 1, wherein the access flange (60) is provided as a solid of revolution and the outlet portion (62) is provided through the access flange (60) along a central axis (CC) of the access flange (60).
  3. 3. The Battery Pack (BP) according to claim 2, wherein the shunt chamber (610) chamber is provided as an annular chamber surrounding the outlet portion (62).
  4. 4. The Battery Pack (BP) of claim 3, wherein the inlet portion (61) further comprises a plurality of shunt channels (614), each shunt channel (614) of the plurality of shunt channels (614) having one end in communication with the shunt cavity (610) and the other end in communication with the inlet end (301) of a corresponding first conduit (30) of the plurality of first conduits (30).
  5. 5. The Battery Pack (BP) of claim 4, wherein the plurality of shunt channels (614) are evenly distributed circumferentially around the outlet portion (62).
  6. 6. The Battery Pack (BP) according to any one of claims 1 to 5, wherein the access flange (60) comprises a groove (64) open towards the outer wall surface (12), the groove (64) and the outer wall surface (12) together delimiting the shunt chamber (610).
  7. 7. The Battery Pack (BP) according to any one of claims 1 to 5 wherein the access flange (60) comprises a frusto-conical body portion (65) and a connecting portion (66) extending radially outwardly from a bottom edge of the body portion (65), the body portion circumscribing the inlet portion (61) and the outlet portion (62), the connecting portion (66) being fixedly connected to the outer wall surface (12).
  8. 8. The Battery Pack (BP) according to any one of claims 1 to 5, further comprising a reservoir (50), the reservoir (50) being arranged between the plurality of first conduits (30) and the at least one second conduit (40) and being connected to the outlet end (302) of each first conduit (30) and the inlet end (401) of the second conduit (40), wherein the outlet end (302) of each first conduit (30) is positioned higher than the inlet end (401) of the second conduit (40).
  9. 9. A vehicle characterized by comprising a Battery Pack (BP) according to any one of claims 1 to 8.

Description

Battery pack and vehicle comprising same Technical Field The present invention relates generally to the field of vehicle components, and more particularly to a battery pack for a vehicle, and to a vehicle including such a battery pack. Background With the rapid development of the electric and hybrid automobile markets, the thermal management of battery packs as one of the core components of these vehicles has become particularly important. The efficient thermal management system can ensure that the battery module operates in an optimal temperature range, thereby improving the performance and the service life of the battery pack. Current thermal management systems for battery packs include an inlet flange and an outlet flange mounted to the battery pack housing, through which cooling fluid may enter cooling ducts within the battery pack depending on the needs of the system, and from which cooling ducts within the battery pack exit the battery pack after cooling of the battery module. In the prior art, the inlet flange and the outlet flange are respectively arranged at different positions of the battery pack shell, which increases the complexity and maintenance difficulty of the thermal management system, increases the weight and volume of the whole battery pack, and affects the cooling efficiency. Disclosure of Invention The present invention is directed to a battery pack that overcomes at least one of the above-described drawbacks of the prior art. More specifically, the battery pack according to the present invention can integrate the inlet flange and the outlet flange into a single inlet-outlet flange, thus having a simple structure and additional heat transfer performance. A first aspect of the present invention provides a battery pack including a case, a battery module disposed in the case, and a thermal management system for heating and cooling the battery module, the thermal management system including an inlet-outlet flange being a single piece fitted to an outer wall surface of the case and including an inlet portion adapted to be connected with an external input duct and an outlet portion adapted to be connected with an external output duct, and a plurality of first ducts and at least one second duct each extending inside the case and at least partially abutting against a surface of the battery module, wherein the inlet portion includes a shunt chamber through which an inlet end of each of the plurality of first ducts communicates through a wall of the case, and an outlet end of the at least one second duct communicates through the wall with the outlet portion. According to an alternative embodiment of the invention, the access flange is provided as a body of revolution and the outlet portion is provided through the access flange along a centre axis of the access flange. According to an alternative embodiment of the invention, the diversion chamber is arranged as an annular chamber surrounding the outlet portion. According to an alternative embodiment of the invention, the inlet portion further comprises a plurality of flow dividing channels, each of the plurality of flow dividing channels having one end in communication with the flow dividing chamber and the other end in communication with the inlet end of a corresponding one of the plurality of first conduits. According to an alternative embodiment of the invention, the plurality of diverting passages are evenly distributed circumferentially around the outlet portion. According to an alternative embodiment of the invention, the inlet and outlet flange comprises a groove opening towards the outer wall, the groove and the outer wall together delimiting the flow dividing chamber. According to an alternative embodiment of the invention, the inlet and outlet flange comprises a frustoconical body portion and a connecting portion extending radially outwardly from a bottom edge of the body portion, the body portion defining the inlet and outlet portions, the connecting portion being fixedly connected to the outer wall surface. According to an alternative embodiment of the invention, the battery pack further comprises a reservoir arranged between the plurality of first pipes and the at least one second pipe and connected to the outlet end of each first pipe and the inlet end of the second pipe, wherein the outlet end of each first pipe is positioned higher than the inlet end of the second pipe. A second aspect of the invention provides a vehicle comprising a battery pack according to the first aspect of the invention. Compared with the prior art, the battery pack has the advantages that the inlet part and the outlet part are integrated in one inlet and outlet flange, so that the number of parts is reduced, the cost and the volume of the parts are saved, and meanwhile, the cooling fluid entering the battery pack through the inlet part can be additionally cooled by the fluid output through the outlet part by means of the evaporative cooling effect, so that