Water-cooled battery module

Abstract

The utility model relates to the field of new energy batteries, in particular to a water-cooling battery module, which comprises two groups of cover plates arranged in parallel, battery monomers and water-cooling plates, the battery monomers and the water-cooling plates are arranged between the two cover plates in a staggered manner, and the two cover plates are connected through pull rods so as to clamp and fix the battery monomers and the water-cooling plates; all the water cooling plates are hollow plates, and cooling water is injected into plate cavities of the water cooling plates. According to the utility model, the heat dissipation effect on each battery monomer is greatly improved.

Description

Technical Field

[0001] The utility model relates to the field of new energy batteries, in particular to a water-cooled battery module. Background Art

[0002] The battery module is a battery pack formed by connecting multiple power battery cells in series or in parallel, so that the whole can meet the product's demand for electrical energy. As described in patent number "CN220873728U", the existing battery module includes an outer frame, a plurality of battery groups arranged in the outer frame, and a connector for connecting the plurality of battery groups in series. The outer frame includes two parallel side plates, two end plates connected to the two ends of the two parallel side plates, and a plurality of partitions arranged between the two side plates and parallel to the end plates. The plurality of battery groups are separated by the partitions; and a heat conducting plate is also arranged on the inner side of the partition and is in contact with the battery.

[0003] After the existing battery module is equipped with an outer frame to fix and install multiple batteries, the heat generated on the surface of the battery cells is dissipated by the heat conductive plate that is in contact with the batteries. However, since the battery cells are stacked in sequence, a large amount of heat will be generated between the contact surfaces of the batteries. This heat cannot be dissipated outwards through the heat conductive plate, which will cause the temperature of the battery cells to gradually increase during operation, greatly increasing the fire risk of the battery module. Therefore, it is urgent to solve this problem. Utility Model Content

[0004] In order to avoid and overcome the technical problems existing in the prior art, the utility model provides a water-cooled battery module. The utility model greatly improves the heat dissipation effect of each battery cell.

[0005] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0006] A water-cooled battery module comprises two sets of cover plates arranged in parallel, and battery cells and water-cooling plates arranged alternately between the two cover plates. The two cover plates are connected by a pull rod to clamp and fix the battery cells and the water-cooling plates. Each water-cooling plate is a hollow plate, and cooling water is injected into the plate cavity of the water-cooling plate.

[0007] As a further solution of the utility model: each battery cell corresponds to the size of the water cooling plate, each side wall of the cover plate is convexly provided with a mounting bracket for positioning the pull rod, each mounting bracket is located outside the projection range of the water cooling plate in the vertical direction, and there is a distance between each pull rod and the battery cell and the water cooling plate.

[0008] As a further solution of the utility model: the pull rods are screw rods, and each pull rod is locked and fixed with each mounting bracket through threaded cooperation.

[0009] As a further solution of the utility model: a welding connecting piece is arranged on the side where the electrode of each battery cell is located, and the electrode poles of adjacent battery cells are welded and fixed by the welding connecting piece so that each battery cell is matched in series, and a connection row installation hole is pre-opened on the welding connecting piece.

[0010] As a further solution of the utility model: a protective shell plate is installed on the side where the electrode of each battery cell is located, and each welding connecting piece is covered and protected by the protective shell plate; two groups of mounting brackets are arranged on each side wall of the cover plate, and the spacing between the two mounting brackets on one side of the cover plate corresponding to the protective shell plate is equal to the width of the protective shell plate.

[0011] As a further solution of the utility model: the side wall of the water-cooling plate is provided with a water inlet and a water outlet connected to the water-cooling plate cavity, the water inlet pipe is arranged in a direction parallel to the pull rod, the water inlet pipe is connected to the water inlet of each water-cooling plate through a diverter joint, the water outlet pipe is arranged in a direction parallel to the pull rod, and the water outlet pipe is connected to the water outlet of each water-cooling plate through a diverter joint.

[0012] As a further solution of the utility model: there is a distance between the water inlet pipe, the water outlet pipe and each shunt joint and each battery cell for installing a protective patch.

[0013] As a further solution of the utility model: the diverter joint is detachably connected with each water inlet pipe and water outlet pipe through a parent-child locking buckle.

[0014] Compared with the prior art, the beneficial effects of the utility model are:

[0015] 1. The utility model arranges the battery cells and the internally hollow water-cooling plates in an alternating manner. By introducing cooling water into the water-cooling plates, the battery surfaces of the battery cells and the contact surfaces of the water-cooling plates are fully in contact with each other for heat dissipation, which greatly improves the heat dissipation efficiency of the battery, and improves the battery performance and service life. Each battery cell and the water-cooling plate are directly clamped and fixed by the cooperation of the cover plate and the pull rod, which can realize the rapid disassembly and assembly of the battery module.

[0016] 2. The utility model provides a mounting bracket protruding from the side of the cover plate so that the pull rod does not come into direct contact with the battery cell and the water cooling plate when connecting the cover plate, thereby avoiding scratch damage to the battery cell during installation. The pull rod and the mounting bracket can be locked by threaded cooperation to adjust the locking force of each battery cell in real time.

[0017] 3. The electrode poles of adjacent battery cells of the utility model are welded and fixed by welding connecting pieces, so that each battery cell can be connected in series. The welding connecting pieces at the head end and the tail end are pre-opened with connection row mounting holes, and the modules are connected to each other through the connection row and the connection row mounting holes. After the welding connecting plate connects each battery cell, the protective shell plate covers each welding connecting piece for protection, and the protective shell plate can also prevent the high-voltage part of the module from direct contact.

[0018] 4. The water inlet and outlet of the water cooling plate of the utility model are also convexly arranged, and will not come into direct contact with the battery cells when installing the water inlet pipe and the water outlet pipe. There is a distance between the water inlet pipe, the water outlet pipe and each shunt joint and the battery cells, so that a protective patch can be installed. The protective patch is used to prevent the battery from being damaged during installation. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a structural schematic diagram of the utility model.

[0020] Figure 2 It is a schematic diagram of the assembly of each water cooling plate of the utility model.

[0021] In the figure:

[0022] 1. Cover plate; 11. Mounting bracket;

[0023] 2. Battery cell; 3. Water cooling plate;

[0024] 31. Water inlet; 32. Water outlet; 33. Diverter joint; 34. Water inlet pipe; 35. Water outlet pipe;

[0025] 4. Pull rod; 5. Welding connecting piece; 51. Connecting row mounting hole;

[0026] 6. Protective shell plate; 7. Protective patch. DETAILED DESCRIPTION

[0027] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0028] See also Figure 1 In an embodiment of the utility model, a water-cooled battery module includes battery cells 2 and water-cooling plates 3 that are stacked and arranged alternately in sequence. Two sets of cover plates 1 arranged in parallel lock and fix each battery cell 2 and the water-cooling plate 3. The battery cell 2 is preferably the same size as the water-cooling plate 3.

[0029] The four side walls of the two cover plates 1 extend outward horizontally to form mounting brackets 11, and each side wall of the cover plate 1 is preferably arranged with two groups of mounting brackets 11. The two groups of mounting brackets 11 corresponding to the two cover plates 1 are connected by a tie rod 4, and the two cover plates 1 clamp and fix each battery cell 2 and the water cooling plate 3 through the fixation of the tie rod 4. The fixing method between the tie rod 4 and the mounting bracket 11 is not limited, and can be fixed by welding or threading. Preferably, the tie rod 4 is designed as a screw, and can be provided with a forward thread and a reverse thread at both ends of the screw, and the mounting brackets 11 of the two cover plates 1 are matched with the opposite thread rotation threads, so as to be locked and fixed.

[0030] After the tie rod 4 is fixed, there is a gap between the tie rod 4 and the battery cell 2 and the water cooling plate 3 to avoid contact during installation. A welding connecting piece 5 is arranged on the side where the electrode of the battery cell 2 is located, and the electrode poles of adjacent battery cells 2 are welded and fixed by the welding connecting piece 5, so that each battery cell 2 can be connected in series. The welding connecting piece 5 at the head end and the tail end is pre-opened with a connection row installation hole 51, and the modules are connected to each other through the connection row and the connection row installation hole 51.

[0031] After each welding connecting piece 5 is fixed, each welding connecting piece 5 is covered and protected by a set of protective shell plates 6, which can also prevent the high-voltage part of the module from being directly contacted. The width of the protective shell plate 6 is equal to the spacing between the two mounting brackets 11 on the side where the electrode of the cover plate 1 is located, so that the protective shell plate 6 can be clamped and fixed by the two mounting brackets 11 when installed, and the protective shell plate 6 can be fixed to the mounting bracket 11 by bolts or welding.

[0032] The water-cooling plate 3 is a hollow plate body, and circulating cooling water is introduced into its plate cavity. The side wall of the water-cooling plate 3 is horizontally convexly provided with a water inlet 31 and a water outlet 32, and the water inlet 31 and the water outlet 32 ​​are arranged higher than the battery cell 2. The water inlet pipe 34 and the water outlet pipe 35 are arranged parallel to each other along the stacking direction of the battery cell 2, and the water inlet pipe 34 and the water outlet pipe 35 are connected to the water inlet 31 and the water outlet 32 ​​of each water-cooling plate 3 through the diverter joint 33. The diverter joint 33 and each water inlet 31, water outlet 32, water inlet pipe 34, and water outlet pipe 35 can be detachably fixed through letter lock buckles, and a secondary locking structure is attached.

[0033] There is a gap between the water inlet pipe 34, the water outlet pipe 35 and each shunt joint 33 and the battery cell 2 for installing the protective patch 7, which is used to prevent the battery from being damaged during installation. The protective patch 7 has the properties of wear resistance, insulation, and penetration resistance. The water inlet pipe 34, the water outlet pipe 35 and the electrodes of the battery cell 2 are not located on the same side, and the two groups of mounting brackets 11 on the side where the cover plate 1 water cooling module is located are located between the water inlet pipe 34 and the water outlet pipe 35.

[0034] During installation, first install a set of water-cooling plates 3 on the inner side of the two cover plates 1, and then assemble the battery cells 2 and the water-cooling plates 3 between the cover plates 1 in a staggered arrangement. After the assembly is completed, fix the tie rods 4 to complete the fixation of the battery cells 2 and the water-cooling plates 3 in the module. After the fixation is completed, the protective patch 7 is attached to the set position, the tie rods 4 are tightened, and the welding connecting pieces 5 are welded to the poles of the battery cells 2 to complete the series connection of each battery cell 2. After the connection is completed, the protective shell plate 6 is installed, and finally the water-cooling unit composed of the water outlet pipe 35 and the water inlet pipe 34 is installed to complete the assembly of a single module. Different modules are connected through the connecting row and the connecting row mounting holes 51.

[0035] The basic principles of the present application are described above in conjunction with specific embodiments. However, it should be noted that the advantages, strengths, effects, etc. mentioned in the present application are only examples and not limitations, and it cannot be considered that these advantages, strengths, effects, etc. are required by each embodiment of the present application. In addition, the specific details disclosed above are only for the purpose of illustration and ease of understanding, not for limitation, and the above details do not limit the present application to being implemented by adopting the above specific details.

[0036] The block diagrams of the devices, apparatuses, equipment, and systems involved in this application are only illustrative examples and are not intended to require or imply that they must be connected, arranged, and configured in the manner shown in the block diagram. As will be appreciated by those skilled in the art, these devices, apparatuses, equipment, and systems can be connected, arranged, and configured in any manner. Words such as "including", "comprising", "having", etc. are open words, referring to "including but not limited to", and can be used interchangeably with them. The words "or" and "and" used here refer to the words "and / or" and can be used interchangeably with them, unless the context clearly indicates otherwise. The words "such as" used here refer to the phrase "such as but not limited to", and can be used interchangeably with them.

Claims

1. A water-cooled battery module, characterized in that: The invention comprises two groups of cover plates (1) arranged in parallel, and battery cells (2) and water cooling plates (3) arranged alternately between the two cover plates (1); the two cover plates (1) are connected by a pull rod (4) to clamp and fix each battery cell (2) and the water cooling plate (3); each water cooling plate (3) is a hollow plate, and cooling water is injected into the plate cavity of the water cooling plate (3).

2. A water-cooled battery module according to claim 1, characterized in that: The size of each battery cell (2) corresponds to that of the water cooling plate (3); each side wall of the cover plate (1) is provided with a mounting bracket (11) for positioning the pull rod (4); each mounting bracket (11) is located outside the projection range of the water cooling plate (3) in the vertical direction; and each pull rod (4) is spaced from the battery cell (2) and the water cooling plate (3).

3. A water-cooled battery module according to claim 2, characterized in that: The pull rods (4) are screw rods, and each pull rod (4) is locked and fixed to each mounting bracket (11) by threaded engagement.

4. A water-cooled battery module according to claim 2, characterized in that: A welding connection sheet (5) is arranged on the side where the electrode of each battery cell (2) is located, and the electrode poles of adjacent battery cells (2) are welded and fixed through the welding connection sheet (5) so that the battery cells (2) are connected in series, and a connection row installation hole (51) is pre-opened on the welding connection sheet (5).

5. A water-cooled battery module according to claim 4, characterized in that: A protective shell plate (6) is installed on the side where the electrode of each battery cell (2) is located, and each welding connecting piece (5) is covered and protected by the protective shell plate (6); two groups of mounting brackets (11) are arranged on each side wall of the cover plate (1), and the spacing between the two mounting brackets (11) on the side of the cover plate (1) corresponding to the protective shell plate (6) is equal to the width of the protective shell plate (6).

6. A water-cooled battery module according to any one of claims 1 to 5, characterized in that: The side wall of the water-cooling plate (3) is provided with a water inlet (31) and a water outlet (32) which are connected to the plate cavity of the water-cooling plate (3); the water inlet pipe (34) is arranged along the direction parallel to the pull rod (4); the water inlet pipe (34) is connected to the water inlet (31) of each water-cooling plate (3) through a diverter joint (33); the water outlet pipe (35) is arranged along the direction parallel to the pull rod (4); the water outlet pipe (35) is connected to the water outlet (32) of each water-cooling plate (3) through a diverter joint (33).

7. A water-cooled battery module according to claim 6, characterized in that: There is a spacing between the water inlet pipe (34), the water outlet pipe (35), each flow diversion joint (33) and each battery cell (2) for installing a protective patch (7).

8. The water-cooled battery module according to claim 6, characterized in that: The diverter joint (33) is detachably connected to each water inlet pipe (34) and the water outlet pipe (35) via a parent-child lock.

Images