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CN-122000540-A - Immersed direct-cooling battery pack

CN122000540ACN 122000540 ACN122000540 ACN 122000540ACN-122000540-A

Abstract

The invention discloses an immersed direct-cooling battery pack, which relates to the technical field of electrochemical energy storage and comprises a box body, wherein a plurality of battery modules are accommodated in an inner cavity of the box body, a tray is fixed in the box body, a plurality of cooling pipes are uniformly distributed on one side end face of the tray, cooling pipes circularly flow refrigerant, a plurality of pressure relief valve holes are uniformly distributed on the tray, chambers on two sides of the tray are communicated through the pressure relief valve holes, heat conducting liquid is filled in the inner cavity of the box body, the cooling pipes are immersed by the heat conducting liquid, an upper cover is arranged at a box body port, and the inner cavity of the box body is sealed by the upper cover.

Inventors

  • WEI YINTAO
  • WANG ZIRAN
  • SUN YONG
  • WANG GUOZHEN
  • LI YUEFENG
  • ZHU QINGQING

Assignees

  • 运达智储科技(河北)有限公司

Dates

Publication Date
20260508
Application Date
20260312

Claims (10)

  1. 1. The immersed direct-cooled battery pack is characterized by comprising a box body (1), wherein a plurality of battery modules (4) are accommodated in an inner cavity of the box body (1), a tray (3) is fixed in the box body (1), a plurality of cooling pipes (5) are uniformly distributed on one side end face of the tray (3) deviating from the battery modules (4), a refrigerant circularly flows in the cooling pipes (5), a plurality of flow holes (34) are uniformly distributed on the tray (3), the chambers on two sides of the tray (3) are communicated through the flow holes (34), heat conducting liquid is filled in the inner cavity of the box body (1), the cooling pipes (5) are immersed by the heat conducting liquid, an upper cover (2) is arranged at a port of the box body (1), and the inner cavity of the box body (1) is sealed by the upper cover (2).
  2. 2. The immersed direct-cooling battery pack according to claim 1, wherein a temperature sensor (9) is fixed at one end of each battery module (4) close to the tray (3), each temperature sensor (9) is connected with a temperature management component (6) in a signal manner, the temperature management components (6) are connected with a communication component (8) in a signal manner, and when the temperature sensor (9) detects that the temperature of the battery module (4) exceeds a preset value, the communication component (8) sends an operation signal to a direct-cooling unit, and the direct-cooling unit is used for conveying the refrigerant into each cooling pipe (5).
  3. 3. The immersed direct-cooled battery pack according to claim 2, wherein each cooling tube (5) is S-shaped, each cooling tube (5) is connected in series, a tube groove (31) is formed in the end face, facing away from the battery module (4), of the tray (3), each cooling tube (5) is embedded in the tube groove (31), a plurality of pairs of tie holes (35) are symmetrically formed in two sides of the tube groove (31), and ties are arranged in the tie holes (35) in a penetrating manner to fix the cooling tubes (5).
  4. 4. The immersed direct-cooled battery pack according to claim 2, wherein a plurality of fixing grooves (32) are uniformly distributed on the end surface of the tray (3) facing the upper cover (2), each fixing groove (32) is used for fixing a buffer pad (33), and the buffer pads (33) are abutted against the upper cover (2).
  5. 5. The immersed direct-cooled battery pack according to claim 2, wherein the box body (1) comprises a surrounding frame and a bottom plate, an inner cavity of the surrounding frame is fixedly connected with a mounting beam (11), the mounting beam (11) is used for fixing each battery module (4), the temperature management assembly (6) is fixed on the inner wall of the surrounding frame, and two ends of the cooling pipes (5) which are connected in series are communicated with an input port and an output port of the direct-cooled unit through clamping sleeve connectors (13).
  6. 6. The immersed direct cooling battery pack according to claim 5, wherein the bottom plate is used for bearing each battery module (4), a plurality of grooves (12) are uniformly distributed on one side end surface of the bottom plate, which is close to the battery module (4), and each groove (12) is arranged in parallel with the mounting beam (11).
  7. 7. The immersed direct cooling battery pack according to claim 6, wherein an oil level indicator (7) is arranged on the side wall of the surrounding frame, and the oil level indicator (7) is used for detecting the liquid level of the heat conducting liquid in the box body (1).
  8. 8. The immersed direct-cooled battery pack according to claim 7, wherein a ball valve (10) is arranged on one side edge of the side wall of the surrounding frame, which is close to the bottom plate, the ball valve (10) is used for filling or draining liquid of the box body (1), and the ball valve (10), the communication assembly (8), the clamping sleeve connectors (13) and the oil indicator (7) are all positioned on the same side wall of the surrounding frame.
  9. 9. The immersed direct-cooled battery pack according to claim 1, wherein an exhaust port (21) and a pressure relief valve (22) are arranged on the end face of one side of the upper cover (2) away from the battery module (4), and the pressure relief valve (22) and the exhaust port (21) are communicated with the inner cavity of the box body (1).
  10. 10. The immersed direct-cooled battery pack according to claim 2, wherein connecting plates extend to the periphery of the port edge of the box body (1), a plurality of fixing holes are uniformly distributed on each connecting plate, each connecting plate is used for bearing the upper cover (2), fastening screws penetrate through each fixing hole, each fastening screw fixedly connects the upper cover (2) with the box body (1), and sealing strips are clamped between the upper cover (2) and the connecting plates.

Description

Immersed direct-cooling battery pack Technical Field The invention relates to the technical field of electrochemical energy storage, in particular to an immersed direct-cooling battery pack. Background With the rapid development of electrochemical energy storage technology, thermal management becomes a core technical problem affecting the performance, safety and service life of an energy storage battery pack. The traditional air cooling and indirect liquid cooling modes have the inherent defects of low heat dissipation efficiency and uneven temperature distribution, and under the high-load working condition, the heat generated by the battery cell is difficult to quickly dissipate, the risk of thermal runaway is easy to cause, and the reliability of the system operation is seriously reduced. At present, a main stream of immersed battery packs mostly adopts a form of combining bottom cooling with passive or active immersion, a cold plate is arranged below a battery cell, but heat at the top of the battery cell needs to be transmitted from top to bottom through immersion liquid, a heat conduction path is long, thermal stratification is easy to form, the temperature difference between the top and the bottom of the battery cell is large, the consistency of the battery is affected, and a pump group and a pipeline need to be arranged for active immersion owe, so that the system cost and the sealing and strength requirements of a box body are increased. Meanwhile, the existing surrounding coil heat exchange scheme is not matched with the central heating rule of the upper middle part of the battery cell, has delayed response to top hot spots, and also has the problems of complex structure, low space utilization rate, high risk of leakage of cooling medium and the like. In summary, developing a battery pack with a simple structure, suitable for the heating characteristics of the battery and stable heat dissipation is a problem to be solved by those skilled in the art. Disclosure of Invention The invention aims to provide an immersed direct-cooling battery pack, which solves the problems of low heat dissipation efficiency, uneven temperature and the like of the traditional air cooling and indirect liquid cooling modes, and solves the technical problems that under the high-load working condition, heat generated by a battery cannot be dissipated in time, so that the thermal runaway risk is caused, and the reliability of a battery system is seriously influenced. To achieve the above object, the present invention provides an immersion type direct cooling battery pack comprising: the inner chamber of box has held a plurality of battery modules, is fixed with the tray in the box, and the tray has evenly laid a plurality of cooling tubes on the terminal surface of one side that deviates from battery module, and the cooling tube internal circulation has the refrigerant, has evenly laid a plurality of flow holes on the tray, and each flow hole is with the cavity intercommunication of tray both sides, and the inner chamber of box is filled with the heat conduction liquid, and the heat conduction liquid submerges each cooling tube, and box port department is equipped with the upper cover, and the upper cover is sealed with the box inner chamber. Preferably, one end of each battery module close to the tray is fixed with a temperature sensor, each temperature sensor is connected with a temperature management assembly in a signal mode, the temperature management assembly is connected with a communication assembly in a signal mode, when the temperature sensor detects that the temperature of the battery module exceeds a preset value, the communication assembly sends an operation signal to the direct cooling unit, and the direct cooling unit is used for conveying refrigerants into each cooling pipe. Preferably, each cooling tube is S type, and each cooling tube series connection is provided with the tube duct on the terminal surface that the tray deviates from battery module, and each cooling tube gomphosis is in the tube duct, and the bilateral symmetry of tube duct is equipped with a plurality of pairs of ribbon holes, wears to establish the ribbon in the ribbon hole and is used for fixed cooling tube. Preferably, the tray is evenly provided with a plurality of fixing grooves on the end face facing the upper cover, each fixing groove is used for fixing the buffer cushion, and the buffer cushion is abutted with the upper cover. Preferably, the box includes encloses frame and bottom plate, encloses the inner chamber fixedly connected with installation roof beam of frame, and the installation roof beam is used for fixed each battery module, and temperature management subassembly is fixed in on the inner wall of enclosing the frame, and the both ends of the cooling tube of establishing ties are through cutting ferrule joint and direct cooling unit's input port, delivery outlet intercommunication. Preferably, the bottom plate is used for