Battery pack with reinforced liquid cooling plate structure

Abstract

The invention discloses a battery pack with a reinforced liquid cooling plate structure, which is provided with a box body assembly in a square frame shape; the battery module is mounted in the box body assembly; the liquid cooling plate is mounted at the lower end of the box body assembly; the liquid cooling plate comprises a bottom plate and a cover plate, a series of grooves are formed in the bottom plate, the cover plate is a flat plate, and the grooves of the bottom plate and the cover plate define a flow channel. A support is added on the back of the liquid-cooled plate to improve the supporting strength of the liquid-cooled plate and prevent the liquid-cooled plate from being extruded and deformed.

Description

Technical Field

[0001] The present invention belongs to the technical field of automotive power batteries, and in particular relates to a battery pack with a reinforced liquid cooling plate structure. Background Art

[0002] At present, with the rapid development of new energy vehicles, new energy PACK, as an on-board energy storage device, is also a module with a relatively large proportion of the value of the entire vehicle. At present, power battery liquid cooling plate technology has gradually become the mainstream heat dissipation technology of battery systems, with broad application prospects. At present, many well-known companies and institutions in the field of electric vehicles have begun to adopt liquid cooling technology. The liquid cooling plate is one of the important components of the cooling system. Through the liquid flow circulation inside the liquid cooling plate, the heat generated inside the battery can be quickly taken away, thereby achieving fast and accurate heat dissipation. According to the form of the liquid cooling plate, it can be divided into harmonica tube type, stamping type and inflation type liquid cooling plate.

[0003] In the process of implementing the present invention, the inventors found that the prior art has at least the following problems:

[0004] At present, liquid cooling plate technology has developed to the third generation, that is, under the CTP3.0 structural change, some battery companies adopt the side cooling solution of the battery cell, and the liquid cooling plate also serves as a structural part, resulting in large changes in the position and usage of the liquid cooling plate and other battery structures. Taking CATL Kirin Battery as an example, the Kirin Battery adopts the side cooling method, and the liquid cooling plate is changed from the original large plate to multiple small pieces. In addition to the above process routes, Tesla has cylindrical batteries and side liquid cooling on some models. From 2013 to 2021, the serpentine tube is changed to a U-shaped tube, the battery cells become more, and the flow channels increase. From the overall development trend, the current liquid cooling solutions are mainly concentrated on a single side, bottom cooling or side cooling. It is not ruled out that the cooling area will increase accordingly with the increase in power in the future.

[0005] In general, power battery liquid cooling plate technology has made great progress, but there are still some technical bottlenecks, such as the manufacturing process, cooling effect, safety and other aspects of the liquid cooling plate need further improvement and perfection.

[0006] The flow channel of the traditional liquid cooling plate adopts a groove design, so the surface of the liquid cooling plate will protrude. After the battery module is installed, the battery module will squeeze the liquid cooling plate, which can easily cause deformation of the liquid cooling plate.

[0007] CN207800824U-A liquid cooling plate and battery module for soft-package power batteries, discloses a liquid cooling plate and battery module for soft-package power batteries. The liquid cooling plate includes a rectangular plate body and a PTC electric heating strip, a plurality of flow channels are arranged inside the plate body, a water inlet and a water outlet are arranged at both ends of the plate body, each flow channel is connected with the water inlet and the water outlet, and at least one PTC electric heating strip is fixed on the side wall of the plate body, which also cannot solve the above technical problems. Summary of the invention

[0008] The technical problem to be solved by the present invention is to provide a battery pack with a reinforced liquid cooling plate structure, to add support on the back of the liquid cooling plate, to improve the support strength of the liquid cooling plate, and to prevent the liquid cooling plate from being squeezed and deformed.

[0009] In order to solve the above technical problems, the technical solution adopted by the present invention is: a battery pack with a reinforced liquid cooling plate structure, having:

[0010] The box assembly is in the shape of a square frame;

[0011] A battery module is installed in the box assembly;

[0012] A liquid cooling plate is installed at the lower end of the box assembly; the liquid cooling plate includes a bottom plate and a cover plate, the bottom plate is provided with a series of grooves, the cover plate is a flat plate, and the grooves of the bottom plate and the cover plate enclose a flow channel.

[0013] The box assembly comprises:

[0014] A frame, which is in the shape of a square frame;

[0015] A partition beam is arranged near one end of the frame, and the partition beam divides the space in the frame into a battery room and an electrical room, wherein the battery module is installed in the battery room; and the electrical components are installed in the electrical room;

[0016] A crossbeam is provided near the middle of the battery chamber, and the crossbeam can separate the battery modules;

[0017] A support plate is installed at the bottom of the battery chamber, and the battery module is installed on the support plate.

[0018] The support plate is fitted with the flat plate of the liquid cooling plate; a series of through grooves are also provided on the support plate.

[0019] The battery room is also provided with side beams near the frame.

[0020] A BDU assembly and a BMC assembly are respectively provided on both sides of the electrical room.

[0021] The BDU assembly and the BMC assembly are connected to the copper bus and the battery module through a wiring harness.

[0022] A series of cable ties are provided on the electrical room and the partition beam, and the wiring harness is positioned by the cable ties.

[0023] The cover plate is provided with a water inlet and outlet communicated with the flow channel.

[0024] The upper box cover is provided with reinforcing ribs, and the reinforcing ribs are in the shape of an I-shaped Chinese character.

[0025] One of the above technical solutions has the following advantages or beneficial effects: adding support on the back of the liquid cooling plate to improve the support strength of the liquid cooling plate and prevent the liquid cooling plate from being squeezed and deformed. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 A schematic diagram of the structure of a battery pack with a reinforced liquid cooling plate structure provided in an embodiment of the present invention;

[0027] Figure 2 for Figure 1 A schematic diagram of the structure of a battery pack with a reinforced liquid cooling plate structure;

[0028] Figure 3 for Figure 1 A schematic diagram of the structure of a battery pack with a reinforced liquid cooling plate structure;

[0029] Figure 4 for Figure 1 A schematic diagram of the structure of a battery pack with a reinforced liquid cooling plate structure;

[0030] Figure 5 for Figure 1 A schematic diagram of the structure of a battery pack with a reinforced liquid cooling plate structure;

[0031] Figure 6 for Figure 1 A schematic diagram of the structure of a battery pack with a reinforced liquid cooling plate structure;

[0032] Figure 7 for Figure 1 A schematic diagram of the structure of a battery pack with a reinforced liquid cooling plate structure;

[0033] Figure 8 for Figure 1 A schematic diagram of the structure of a battery pack with a reinforced liquid cooling plate structure;

[0034] Fig. 9 for Figure 1 A schematic diagram of the structure of a battery pack with a reinforced liquid cooling plate structure;

[0035] Fig.10 for Figure 1 A schematic diagram of the structure of a battery pack with a reinforced liquid cooling plate structure;

[0036] The marks in the above figure are:

[0037] 1. Box assembly, 101. frame, 102. support plate, 103. side beam, 104. cross beam, 105. partition beam;

[0038] 2. Liquid cooling plate, 201. bottom plate, 202. cover plate, 203. flow channel, 204. water inlet and outlet;

[0039] 3. Upper box cover, 301, reinforcement ribs;

[0040] 4. Battery module;

[0041] 5. Copper busbar;

[0042] 6. Wire harness, 601, cable tie;

[0043] 7. BDU assembly; 8. BMC assembly. DETAILED DESCRIPTION

[0044] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0045] See also Figures 1 to 10 A battery pack with a reinforced liquid cooling plate 2 structure comprises: a box assembly 1, which is a square frame; a battery module 4, which is installed in the box assembly 1; a liquid cooling plate 2, which is installed at the lower end of the box assembly 1; the liquid cooling plate 2 comprises a bottom plate 201 and a cover plate 202, the bottom plate 201 is provided with a series of grooves, the cover plate 202 is a flat plate, and the grooves of the bottom plate 201 and the cover plate 202 enclose a flow channel 203. Support is added to the back of the liquid cooling plate 2 to improve the support strength of the liquid cooling plate 2 and prevent the liquid cooling plate 2 from being squeezed and deformed. The cover plate 202 is a flat plate, which is made of a high-strength plate, and has a more uniform contact with the battery module 4, preventing the battery module 4 from squeezing the flow channel 203.

[0046] The box assembly 1 has: a frame 101, which is in a square frame shape; a partition beam 105, which is arranged near one end of the frame 101, and the partition beam 105 divides the space inside the frame 101 into a battery room and an electrical room, and the battery module 4 is installed in the battery room; the electrical components are installed in the electrical room; the partition beam 105 divides the inside of the box, so that the battery module 4 and the electrical components inside the box are separated, and the layout is more reliable and reasonable. A cross beam 104 is arranged near the middle of the battery room, and the cross beam 104 can separate the battery modules 4; by setting the cross beam 104, different battery modules 4 are separated, and the installation of the battery modules 4 is more stable and reliable. Prevent the battery modules 4 from affecting and colliding with each other.

[0047] The support plate 102 is installed at the bottom of the battery chamber, and the battery module is installed on the support plate 102. The support plate 102 plays a role in supporting the battery module 4, and the support is more stable and reliable.

[0048] The support plate 102 is fitted with the flat plate of the liquid cooling plate 2; a series of through grooves are also provided on the support plate 102. The through grooves provided on the support plate 102 can facilitate heat dissipation of the battery module 4 and heat exchange between the battery module 4 and the liquid cooling plate 2.

[0049] A side beam 103 is also provided near the frame 101 in the battery room to strengthen the frame 101. Since the battery module 4 is heavy, the load capacity requirement of the frame 101 is increased, so the side beam 103 is provided to strengthen the frame 101 and prevent the battery module 4 from squeezing and deforming the frame 101.

[0050] The BDU assembly 7 and the BMC assembly 8 are respectively provided on both sides of the electrical room. The BDU assembly 7 and the BMC assembly 8 are connected to the copper bus 5 and the battery module 4 through the wiring harness 6. The BDU assembly 7 and the BMC assembly 8 play a role in controlling the operation of the battery module 4.

[0051] A series of cable ties 601 are provided on the electrical room and the partition beam 105 , and the wire harness 6 is positioned by the cable ties 601 , so that the arrangement of the wire harness 6 is safer and more orderly.

[0052] The cover plate 202 is provided with a water inlet and outlet 204 connected to the flow channel 203 , and the water inlet and outlet 204 serves to transmit the cooling medium into the liquid cooling plate 2 .

[0053] The upper box cover 3 is provided with a reinforcing rib 301 , which is in the shape of an I-shaped character and serves to strengthen the upper box cover 3 .

[0054] Conventional liquid cooling plates have a large liquid cooling area, and most of them use large protruding flow channels, which have insufficient compressive strength. The present invention adds a high-strength support (such as Figure 7 ), so that the bearing capacity is greatly enhanced.

[0055] After adopting the above structure, support is added on the back of the liquid cooling plate to improve the support strength of the liquid cooling plate and prevent the liquid cooling plate from being squeezed and deformed.

[0056] In the description of the present invention, it is necessary to understand that the terms "coaxial", "bottom", "one end", "top", "middle", "the other end", "upper", "one side", "top", "inside", "front", "center", "both ends" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0057] In the present invention, unless otherwise clearly stipulated and limited, the terms such as "installation", "setting", "connection", "fixation" and "screw-on" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral one; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be the internal connection of two elements or the interaction relationship between two elements. Unless otherwise clearly defined, ordinary technicians in this field can understand the specific meanings of the above terms in the present invention according to the specific circumstances.

[0058] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A battery pack with a reinforced liquid cooling plate structure, characterized in that: have: The box assembly is in the shape of a square frame; A battery module is installed in the box assembly; A liquid cooling plate is installed at the lower end of the box assembly; the liquid cooling plate includes a bottom plate and a cover plate, the bottom plate is provided with a series of grooves, the cover plate is a flat plate, and the grooves of the bottom plate and the cover plate enclose a flow channel.

2. The battery pack with a reinforced liquid cooling plate structure according to claim 1, characterized in that: The box assembly comprises: A frame, which is in the shape of a square frame; A partition beam is arranged near one end of the frame, the partition beam divides the space in the frame into a battery room and an electrical room, and the battery module is installed in the battery room; Electrical components are installed in the electrical room; A crossbeam is provided near the middle of the battery chamber, and the crossbeam can separate the battery modules; A support plate is installed at the bottom of the battery chamber, and the battery module is installed on the support plate.

3. The battery pack with a reinforced liquid cooling plate structure as claimed in claim 2, characterized in that: The support plate is fitted with the flat plate of the liquid cooling plate; a series of through grooves are also provided on the support plate.

4. The battery pack with a reinforced liquid cooling plate structure as claimed in claim 3, characterized in that: The battery room is also provided with side beams near the frame.

5. The battery pack with a reinforced liquid cooling plate structure as claimed in claim 4, characterized in that: A BDU assembly and a BMC assembly are respectively provided on both sides of the electrical room.

6. The battery pack with a reinforced liquid cooling plate structure as claimed in claim 5, characterized in that: The BDU assembly and the BMC assembly are connected to the copper bus and the battery module through a wiring harness.

7. The battery pack with a reinforced liquid cooling plate structure according to claim 6, characterized in that: A series of cable ties are provided on the electrical room and the partition beam, and the wiring harness is positioned by the cable ties.

8. The battery pack with a reinforced liquid cooling plate structure according to claim 7, characterized in that: The cover plate is provided with a water inlet and outlet communicated with the flow channel.

9. The battery pack with a reinforced liquid cooling plate structure as claimed in claim 8, characterized in that: The upper box cover is provided with reinforcing ribs, and the reinforcing ribs are in the shape of an "I".

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