Plastic water cooling plate
By using water-cooled plates made of plastic, the aluminum snake-shaped cold plates have solved the problems of high cost, large weight and poor toughness, and the effect of reducing costs and weight, improving toughness and charging and discharge effects.
Patent Information
- Application Number
- CN202420900244.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-04-28
- Publication Date
- 2025-02-18
- Estimated Expiration
- 2034-04-28
AI Technical Summary
The existing aluminum serpentine cold plate materials are cost-effective, have large weight, require anti-corrosion treatment and poor toughness, making it difficult to adapt to the expansion and contraction of new energy battery cells during charging and discharging processes, affecting the charging and discharging effects and service life.
Water-cooled plate made of plastic, including current collector, snake-shaped cold plate and end cap. All parts are PPS or PPE plastic. The split partition is curved and connected to the current collector and snake-shaped cold plate through a welding ring to ensure that Sealing and secure connection.
It reduces the material cost and weight of the water-cooled plate, avoids anti-corrosion treatment, improves toughness, reduces the probability of fracture, and can expand and contract with the new energy battery cell, improves the charging and discharge effects, extends the service life, and maintains the cooling effect.
Smart Images
Figure CN222507742U_ABST
Abstract
Description
Technical Field
[0001] The utility model discloses a plastic water cooling plate, which belongs to the technical field of battery core cooling. Background Art
[0002] In the current existing technology, the serpentine cold plate is made of aluminum. A plurality of aluminum serpentine cold plates are arranged in parallel. Each serpentine cold plate has a cooling water circulation channel with water inlet at the bottom and water return at the top, and its internal diversion baffle is straight plate-mounted, such as Figure 1 shown.
[0003] The prior art has the following technical problems. One type is the technical problems caused by the aluminum material, such as the high material cost and manufacturing cost of the serpentine cold plate; the weight of the serpentine cold plate is still heavy; the inside of the serpentine cold plate needs to be treated with anti-corrosion; because the toughness of the serpentine cold plate material is relatively poor, it is easy to break after being installed on the vehicle for a long time; because the modulus of the serpentine cold plate material is large, it is difficult to provide the necessary "breathing space" with the expansion and contraction of the new energy battery cell during the charging and discharging process, thereby affecting the charging and discharging effect of the new energy battery cell. The other type is the technical problems caused by the shape of the shunt baffle inside the serpentine cold plate, such as the straight plate-shaped shunt baffle is difficult to give the necessary deformation with the expansion and contraction of the new energy battery cell during the charging and discharging process, which not only limits the breathing space of the new energy battery cell, but also affects its service life due to squeezing the new energy battery cell. Utility Model Content
[0004] In order to reduce the material cost and manufacturing cost of the serpentine cold plate; further reduce the weight of the serpentine cold plate; eliminate the anti-corrosion treatment process inside the serpentine cold plate; improve the toughness of the serpentine cold plate to avoid breakage due to long-term use in the vehicle; reduce the material modulus of the serpentine cold plate, and change the shape of the shunt baffle so that it can undergo necessary deformation as the new energy battery cell expands and contracts during the charging and discharging process, thereby improving the charging and discharging effect of the new energy battery cell, reducing the extrusion of the new energy battery cell, and extending its service life.
[0005] In the plastic water cooling plate of the utility model, if Figure 2 As shown, the current collector 1 is connected to the return water end 31 of the serpentine cold plate 3, and the end cover 4 is installed at the return water conducting end 32 of the serpentine cold plate 3; Figure 3 As shown, a plurality of flow dividing baffles 33 are distributed inside the serpentine cold plate 3 to form a plurality of water inlet channels 34 and a return water channel 35 of the same number as the water inlet channels 34. The water inlet channels 34 and the return water channels 35 are connected in the end cover 4 to form a circulation channel for water inlet on the upper side and water return on the lower side. It is characterized in that the material of the current collector 1, the serpentine cold plate 3 and the end cover 4 are all plastic, wherein the plastic material of the current collector 1 and the serpentine cold plate 3 can absorb the welding laser; Figure 4As shown, the welding ring 2 is sleeved on the joint between the current collector 1 and the return water end 31 of the serpentine cold plate 3, and overlaps with the current collector 1 and the return water end 31 of the serpentine cold plate 3 respectively; the welding ring 2 is made of plastic material and can pass through the welding laser, and the overlap between the welding ring 2 and the return water end 31 of the serpentine cold plate 3 is achieved by end face laser welding and circumferential laser welding to realize the connection between the welding ring 2 and the serpentine cold plate 3; the overlap between the welding ring 2 and the current collector 1 is achieved by end face hot plate welding and circumferential laser welding to realize the connection between the welding ring 2 and the current collector 1; the diverter baffle 33 is curved.
[0006] The technical effects of the utility model are as follows. Since plastic is used to replace aluminum, on the one hand, not only the material cost and manufacturing cost of the water-cooled plate are comprehensively reduced, but also the weight of the water-cooled plate is significantly reduced, and the anti-corrosion treatment process inside the existing serpentine cold plate is omitted; on the other hand, because the plastic water-cooled plate has good toughness, the probability of breakage due to long-term use after loading is reduced; and because the material modulus of the plastic water-cooled plate is small, and the characteristics of the diversion baffle, the serpentine cold plate in the utility model can easily undergo necessary deformation with the expansion and contraction of the new energy battery cell during the charging and discharging process, thereby improving the charging and discharging effect of the new energy battery cell, and reducing the squeezing of the new energy battery cell, thereby extending its service life. In addition, the welding ring is overlapped with the current collector and the serpentine cold plate respectively and connected by welding, and the middle part is welded and sealed to ensure a firm connection between the three and ensure its sealing so that the liquid will not leak inside or outside.
[0007] As for the cooling effect of the utility model, it can be illustrated by the following experiment. In the experiment, the flow rate of the coolant water inlet is 2L / min, the duration is 6.5min, and other experimental conditions are shown in the following table:
[0008]
[0009] The experimental results are shown in the following table:
[0010]
[0011] Experimental data show that when the existing aluminum serpentine cold plate is used to cool the new energy battery cell, the maximum temperature of the new energy battery cell is 44.51°C. When the serpentine water-cooling plate made of PPS plastic material of the utility model is used to cool the new energy battery cell, the maximum temperature of the new energy battery cell is 44.49°C, and the cooling effect remains basically unchanged. BRIEF DESCRIPTION OF THE DRAWINGS
[0012] Figure 1 It is a schematic diagram of an enlarged cross-section of an aluminum serpentine cold plate in the prior art.
[0013] Figure 2It is a three-dimensional schematic diagram of the overall structure of the utility model.
[0014] Figure 3 The serpentine cold plate edge in the utility model Figure 2 An enlarged schematic diagram of the AA direction section view.
[0015] Figure 4 This is a schematic diagram of the main view of the current collector and the serpentine cold plate in the present invention being connected by a welding ring, and the figure also serves as a summary figure.
[0016] Figure 5 It is a three-dimensional schematic diagram of the welding collar in the utility model.
[0017] Figure 6 This is an enlarged schematic diagram of the cross-section of the cold plate of the utility model embodiment DETAILED DESCRIPTION
[0018] The utility model needs to be further limited as follows.
[0019] The materials of the current collector 1, the welding collar 2, the serpentine cold plate 3 and the end cover 4 are all PPS plastic or PPE plastic.
[0020] When the serpentine cold plate 3 is used in combination with a square new energy battery cell, it can be a straight cold plate.
[0021] The laser welding process for achieving the welding connection between the welding ring 2 and the current collector 1 and the serpentine cold plate 3 is as follows: the welding line height is about 1 mm, the welding melt is 0.6 mm, and the remaining 0.4 mm is used as a gap to accommodate the material.
[0022] The bending shape of the flow dividing baffle 33 is an S-shaped bending shape. Figure 3 As shown, for those who require a larger breathing space, it can be curved, such as Figure 6 shown.
Claims
1. A plastic water-cooled plate, wherein the current collector (1) is connected to the water inlet and outlet ends (31) of the serpentine cold plate (3), and the end cover (4) is installed at the water inlet and outlet conduction end (32) of the serpentine cold plate (3); a plurality of flow dividing baffles (33) are distributed inside the serpentine cold plate (3) to form a plurality of water inlet channels (34) and the same number of water return channels (35) as the water inlet channels (34); the water inlet channels (34) and the water return channels (35) are connected inside the end cover (4); characterized in that: The materials of the current collector (1), the serpentine cold plate (3) and the end cover (4) are all plastic, wherein the plastic materials of the current collector (1) and the serpentine cold plate (3) can absorb welding lasers; the welding collar (2) is sleeved at the joint between the current collector (1) and the return water end (31) of the serpentine cold plate (3), and overlaps with the return water end (31) of the serpentine cold plate (3) respectively; the material of the welding collar (2) is plastic and can pass through the welding laser, and the overlap between the welding collar (2) and the return water end (31) of the serpentine cold plate (3) is achieved by end face laser welding and circumferential laser welding; the overlap between the welding collar (2) and the current collector (1) is achieved by end face hot plate welding and circumferential laser welding; the flow dividing baffle (33) is curved.
2. The plastic water cooling plate according to claim 1, characterized in that: The materials of the current collector (1), the welding collar (2), the serpentine cold plate (3) and the end cover (4) are all PPS plastic or PPE plastic.
3. The plastic water cooling plate according to claim 1, characterized in that: The middle part of the welding collar (2) and the serpentine cold plate (3) is welded and sealed; the middle part of the welding collar (2) and the current collector (1) is welded and sealed.
4. The plastic water cooling plate according to claim 1, characterized in that: The bending shape of the flow dividing baffle (33) is an S-shaped bending shape or an arc-shaped bending shape.