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EP-4675214-B1 - TEMPERATURE-CONTROL PLATE AND BATTERY STORAGE ARRANGEMENT HAVING SUCH A TEMPERATURE-CONTROL PLATE

EP4675214B1EP 4675214 B1EP4675214 B1EP 4675214B1EP-4675214-B1

Inventors

  • GRUSSMANN, ELMAR
  • Landermann, Lars

Dates

Publication Date
20260513
Application Date
20240703

Claims (15)

  1. A temperature-control plate (1), having the following features: 1.1. a support plate (1) is arranged between a smooth upper cover plate (5) and a smooth lower cover plate (6) and is connected to the two cover plates (5, 6); 1.2. the support plate (4) is provided with a temperature-control channel profile (12) to form upper and lower temperature-control channels (13, 14) between the support plate (4) and the adjacent cover plates (5, 6), wherein the upper temperature-control channels (13) run between the upper cover plate (5) and the support plate (4) and the lower temperature-control channels (14) run between the lower cover plate (6) and the support plate (4); 1.3. the support plate (4) has through openings (34) in order to connect the upper and lower temperature-control channels (13, 14) to one another for the temperature-control medium redirection; characterised in that : 1.4. the through openings (34) have different diameters, depending on the length of the path of the temperature-control medium from a temperature-control medium connection (19) to the through opening (34), wherein the diameter is larger if the path is longer.
  2. The temperature-control plate (1) according to claim 1, characterised in that the cover plates (5, 6) each have a smooth area (39, 40) adjacent to the upper and lower temperature-control channels (13, 14) and each have an edge-side collar (17, 18) on the smooth areas (39, 40) for connection to the support plate (4), wherein the collars (17, 18) and the smooth areas (39, 40) are identical in terms of shape.
  3. The temperature-control plate (1) according to claim 1 or 2, characterised in that it has opposite first and second edge sides (7, 8), on each of which a reinforcing strip (42, 43) is arranged.
  4. The temperature-control plate (1) according to claim 4, characterised in that the reinforcing strip (42, 43) is a clamp which engages over the upper and lower cover plates (5, 6).
  5. The temperature-control plate (1) according to claim 3 or 4, characterised in that the reinforcing strip (42, 43) has openings for fastening the temperature-control plate (1) to a housing, in particular to a battery housing.
  6. The temperature-control plate (1) according to any one of claims 1 to 5, characterised in that it has opposite first and second edge sides (7, 8), wherein the support plate (4) has a fastening edge (9, 10) that projects relative to the cover plates (5, 6).
  7. The temperature-control plate (1) according to claim 6, characterised in that the fastening edge (9, 10) has openings (11) for fastening the temperature-control plate (1), in particular to a battery housing.
  8. The temperature-control plate (1) according to any one of claims 1 to 7, characterised in that the support plate (4) is rectangular and has at least one projection (21, 49, 50) on a third edge side (35) for a temperature-control medium connection (19, 20) on one of the cover plates (5).
  9. The temperature-control plate (1) according to claim 8, characterised in that the at least one projection (21, 49, 50) is inclined at an angle in a range of 5 to 45° to the support plate (4).
  10. The temperature-control plate (1) according to claim 8 or 9, characterised in that the through openings (34) for temperature-control medium deflection are arranged adjacent to a fourth edge side (36) which is opposite the third edge side (35).
  11. The temperature-control plate (1) according to any one of claims 1 to 10, characterised in that the temperature-control channels (13, 14) are trapezoidal in cross section and each have walls (51), running between the upper cover plate (5) and the lower cover plate (6), which are formed by the support plate (4), wherein the walls (51) of a temperature-control channel (13, 14) enclose an internal angle (W1) with the cover plate (5, 6) which covers the temperature-control channel (13, 14), wherein the through openings (34) are arranged in a wall region (52) in which the internal angle (W1) is reduced.
  12. The temperature-control plate (1) according to any one of claims 4 to 8, characterised in that the temperature-control medium connection (19) for the inlet is arranged on the upper cover plate (5), wherein the support plate (4) has a connection opening (30), which is connected to an inflow channel (33) to the lower temperature-control channels (13) and wherein the temperature-control medium connection (20) for the drain is connected to the upper cover plate (5) and is connected to an outflow channel (37) which is connected to the upper temperature-control channels (13).
  13. The temperature-control plate (1) according to claim 12, characterised in that the support plate (4) in the area of the inflow channel (33) and the outflow channel (37) has beads (31, 32) which increase the respective flow cross section.
  14. A battery storage arrangement (41), comprising an upper cell level (2), formed from a plurality of battery cells, and a lower cell level (3), formed from a plurality of battery cells, wherein a temperature-control plate (1) with the features according to any one of claims 1 to 13 is arranged between the celllevels (2, 3).
  15. The battery storage arrangement (41) according to claim 14, with a battery housing, wherein the temperature-control plate (1) has opposite first and second edge sides (7, 8), on each of which a reinforcing strip (42, 43) is arranged and/or wherein the support plate (4) has a fastening edge (9, 10), wherein the temperature-control plate (1) is fastened to or in the battery housing by means of the reinforcing strips (42, 43) and/or by means of the fastening edges (9, 10).

Description

The invention relates to a temperature control plate with the features of claim 1 and a battery storage arrangement according to claim 14. A temperature control plate with the features in the preamble of claim 1 is made from the FR 3 100 608 A1 known. A battery's performance and lifespan depend on its operating temperature. To maintain optimal operating temperature, electric vehicles in particular are equipped with battery temperature control systems. These are typically cooling systems. Battery systems are also preheated to reduce internal resistance before charging. Low-profile temperature control plates are particularly suitable for battery temperature management. These plates are placed inside the battery box and make contact with the batteries from below. The US 2013/171491 A1 The diagram reveals an arrangement for dissipating heat from battery cells. Temperature control plates are used in a vertical arrangement, alternating with battery cells. The temperature control plates have a multi-layered structure with a middle plate and cover plates on both sides. Channels are arranged on both sides of the central plate, which, due to the vertical arrangement of the temperature control plates, are designed to fill from bottom to top. Each vertically oriented temperature control plate has a coolant inlet at one end and a coolant outlet at the other. Tempering plates with a three-layer construction are also available from the IT 2020 0003 1469 A1 It is known that an inlet and a return are located on the same edge of a plate. The upper and lower temperature control channels are connected to each other via a through-opening for the redirection of the temperature control fluid; this through-opening is a single slot-shaped opening for all temperature control channels simultaneously. The US 2023/272983 A1 The document discloses cooling plates for battery assemblies, wherein the cooling plates have a three-layer structure with two levels of cooling channels. The coolant is supplied on one side of the plate and discharged on the other side. The US 2024/213575 A1 describes another design of a cooling plate for cooling battery housings as well as the US 2021/028927 A1 . The invention is based on the objective of demonstrating a temperature control plate and a battery storage arrangement with a temperature control plate that is suitable for temperature control of batteries arranged on opposite sides of the temperature control plate. This problem is solved in a temperature control plate with the features of claim 1. A battery storage arrangement with such a temperature control plate is the subject of claim 14. The dependent claims relate to advantageous further developments of the invention. The temperature control plate according to the invention has a support plate between a smooth upper cover plate and a smooth lower cover plate. The support plate is connected to both cover plates. The upper cover plate serves for contact with an adjacent upper cell plane, which is formed from a plurality of battery cells, and the lower smooth cover plate serves for contact with an adjacent lower cell plane, which is formed from a plurality of battery cells. A thermally conductive film or a thermal conductor, as thin as possible, can be arranged on the smooth upper and lower surfaces of the cover plates. The aim is to establish contact with the adjacent batteries, which are to be either cooled or heated by the temperature control plate, with the largest possible surface area and good thermal conductivity. The cover plates are smooth in the sense that 100% of the contact surface with the cell planes is designed as temperature control contacts. The contact surfaces are, in particular, free of grooves, depressions, or openings. The support plate is provided with a cooling channel profile to form cooling channels between the support plate and the adjacent cover plates. The support plate is preferably at least 50% thicker than the cover plates. The support plate is the predominantly load-bearing component of the cooling plate. The cooling channel profiling creates recesses on the top and bottom of the support plate, which are covered from above and below by the cover plates, thus forming cooling channels. The cover plates are bonded to the support plate by a material connection, for example, soldered or welded. The outer cover plates are as... The base plate is thin-walled, while the support plate is preferably thicker and therefore more load-bearing. In this case, the support plate forms the load-bearing structure of the temperature control plate. Due to its profile, the support plate is also particularly rigid. Since the support plate is also connected to the cover plates over a large area, a hollow profile body with numerous chambers and connection points is created. The sandwich construction of the temperature control plate with the highly load-bearing support plate allows for a very flat design and high load-bearing capacity from both