Battery box body structure integrated with liquid cooling in parallel mode

Abstract

The utility model relates to a parallel mode integrated liquid cooling battery box body structure, which belongs to the technical field of new energy battery packs and comprises a box body, a cooling liquid input pipe, a partition plate and a cooling liquid output pipe, a bottom plate is arranged in a groove in the bottom of the box body, and a plurality of parallel flow channels separated by ribs are arranged in the bottom plate; the two partition plates are installed at the ends of the flow channels of the bottom plate respectively. The partition plate is provided with open holes communicated with the flow channels, and the partition plate and the box body are combined to form a collecting pipe. A liquid inlet and a liquid outlet are formed in the end part of the box body; the liquid inlet is connected with one partition plate through the cooling liquid input pipe, and the other partition plate is connected with the liquid outlet through the cooling liquid output pipe. According to the utility model, the problem that the cooling liquid flow resistance and the cell temperature difference are difficult to optimize and adjust due to the integration of a liquid cooling structure in the battery box body structure is solved, the box body manufacturing difficulty is reduced, and the production cost is reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to new energy battery package technical field especially relates to a parallel mode integrated liquid cooling's battery box structure. BACKGROUND

[0002] In the field of new energy battery package, the cooling waterway in the battery package and the battery shell are generally two assembly components, which increases the overall package cost and weight. The scheme of integrating liquid cooling in the lower battery box is limited by the requirements of extruded aluminum profiles and other sections. The flow channels formed by the ribs in the profile are usually straight, and the serial flow channels are formed by removing part of the ribs. The cooling liquid has large pressure loss in the flow channel. Due to the structural characteristics, it is difficult to optimize and adjust the temperature difference of the battery cells. Moreover, the flow channel is complex, and the manufacturing process of the battery box structure is also complex, which increases the manufacturing difficulty. SUMMARY

[0003] To solve the problems existing in the prior art, the utility model provides a parallel mode integrated liquid cooling's battery box structure, which can solve the problem of difficult cooling liquid flow resistance and battery cell temperature difference optimization adjustment caused by the integration of liquid cooling structure in the battery box structure, reduce the complexity of the battery box structure, reduce the manufacturing difficulty of the box body, and reduce the production cost.

[0004] To achieve the above purpose, the utility model has the following scheme:

[0005] A parallel mode integrated liquid cooling's battery box structure, the battery box structure includes a box body, a cooling liquid input pipe, a partition plate, and a cooling liquid output pipe. A bottom plate is arranged in the bottom groove of the box body, and the bottom plate has a plurality of parallel flow channels separated by ribs. Two partition plates are installed at the flow channel ends of the bottom plate. The partition plates have openings communicating with the flow channels, and the partition plates and the box body form a manifold. The box body has an inlet and an outlet. The inlet is connected to one partition plate through the cooling liquid input pipe, and the other partition plate is connected to the outlet through the cooling liquid output pipe.

[0006] Further, the partition plate is in L-shaped or U-shaped structure.

[0007] Further, the partition plate is an aluminum alloy extruded or stamped part.

[0008] Further, the partition plate is installed at the flow channel ends of the bottom plate in a fixed manner by assembly or welding.

[0009] Further, the cooling liquid input pipe and the cooling liquid output pipe each comprise a joint and a transition connecting pipe; the cooling liquid input pipe and the cooling liquid output pipe are respectively installed on the liquid inlet and the liquid outlet through the joint, and the joint is connected with the partition plate through the transition connecting pipe, and the transition connecting pipe communicates with the manifold pipe.

[0010] Further, the joint is a standard machining part.

[0011] Further, the transition connecting pipe is an extruded aluminum alloy pipe bending part or a rubber sleeve.

[0012] Further, the joint and the transition connecting pipe are fixedly connected with the box body and the partition plate through bolts and nuts or welding.

[0013] Further, the thickened ribs are arranged around the flow channel of the bottom plate.

[0014] Further, the thickened ribs are welded in the bottom plate through friction stir welding.

[0015] The battery box structure of the utility model has the advantages of the following:

[0016] The battery box structure of the utility model has the advantages of the following:

[0017] The battery box structure of the utility model has the advantages of the following:

[0018] The partition plate of the utility model can be extruded or stamped, and the manufacturing difficulty is low, and the production cost is reduced. ACCURATE DRAWINGS

[0019] Figure 1 It is a battery box structure of the utility model parallel mode integrated liquid cooling schematic diagram;

[0020] Figure 2 It is a battery box structure of the utility model parallel mode integrated liquid cooling schematic diagram;

[0021] Figure 3 It is a battery box structure of the utility model parallel mode integrated liquid cooling schematic diagram;

[0022] Figure 4 It is a schematic view of the partition plate in the utility model.

[0023] Among them: 1 - box, 2 - cooling liquid input pipe, 3 - partition, 4 - cooling liquid output pipe. DETAILED DESCRIPTION

[0024] In order to make the skilled in the art better understand the technical scheme of the present application, the utility model will be further described in detail in conjunction with the drawings and examples.

[0025] The up, down, left, right, front and back orientation terms in the present application are established based on the positional relationship shown in the drawings. Different drawings may change the corresponding positional relationship, so it cannot be understood as a limitation on the scope of protection.

[0026] In the utility model, the terms "installation", "connection", "interface", "connection", "fixing" and the like should be understood broadly, for example, it can be fixed connection, can also be detachable connection, can also be integrally connected, can also be mechanical connection, can also be electrical connection or can communicate with each other, can also be direct connection, can also be indirect connection through intermediate medium, can be the interconnection of two components inside, or the interaction relationship of two components. For ordinary skilled in the art, the specific meaning of the above terms in the utility model can be understood according to the specific situation.

[0027] The present embodiment describes a parallel integrated liquid-cooled battery box structure, as shown in Figure 1 and Figure 2 The battery box structure includes box 1, cooling liquid input pipe 2, partition 3, cooling liquid output pipe 4.

[0028] The box 1 is a concave structure, and a bottom plate is arranged in the bottom groove of the box 1, and the bottom plate has a plurality of parallel flow channels formed by the ribs. Two partitions 3 are respectively installed at the end of the bottom plate in a fixed manner of assembly or welding. As shown in Figure 3 and Figure 4 The partition 3 is provided with an opening communicated with each flow channel, and the box 1 is combined to form a manifold, so that the entering cooling liquid can flow along the flow channel and the manifold according to the predetermined flow direction, forming the parallel cooling effect. Preferably, the partition 3 adopts L-shaped or U-shaped structure, which is extruded or stamped from aluminum alloy, and the partition 3 can be opened and adjusted to the required structure according to the CAE analysis results.

[0029] The liquid inlet 1.1 and the liquid outlet 1.2 are symmetrically arranged on one end of the box 1, and the cooling liquid enters and exits the bottom plate through the liquid inlet 1.1 and the liquid outlet 1.2. The cooling liquid input pipe 2 and the cooling liquid output pipe 4 are the same in structure, and each includes a joint and a transition connecting pipe. The joint is arranged on the liquid inlet 1.1 and the liquid outlet 1.2, respectively, and the transition connecting pipe is connected to the joint at one end and inserted into the collecting pipe and connected to the partition plate 3 at the other end.

[0030] The joint of the embodiment is a standard processed part, the transition connecting pipe is bent from an extruded aluminum alloy pipe or made of a rubber sleeve, and the two ends of the cooling liquid connecting pipe 2 can be fixedly installed by means of bolts and nuts or welding.

[0031] The use scenario of the parallel mode integrated liquid cooling battery box structure of the embodiment is as follows: when the vehicle is started, the cooling liquid with low / high temperature flows into the partition plate 3 at one end of the box 1 through the liquid inlet 1.1 and the cooling liquid input pipe 2 of the box 1, flows in the collecting pipe of the partition plate 3 according to the set flow direction, and part of the cooling liquid flows into the flow channel in the bottom plate through the opening on the partition plate 3 and flows out from the other end of the flow channel and into the partition plate 3 at the other end of the box 1, flows in the collecting pipe of the partition plate 3 according to the set flow direction, and flows out through the liquid outlet 1.2 and the cooling liquid output pipe 4, forming a parallel flow effect. The cooling liquid absorbs the heat transferred to the bottom plate inside the battery pack during the flow process, thereby achieving a cooling effect.

[0032] The thickened ribs can be welded in the bottom plate by means of stir friction penetration welding, etc., to ensure the sealing of the bottom plate in the box 1.

[0033] Although the principle of the utility model is described in detail above in combination with the preferred embodiments of the utility model, those skilled in the art should understand that the above embodiments are only an illustrative implementation of the utility model, and are not a limitation on the scope of the utility model. The details in the embodiments do not constitute a limitation on the scope of the utility model, and any equivalent transformation, simple replacement, etc. based on the technical solution of the utility model, which is obvious, falls within the protection scope of the utility model.

Claims

1. A parallel-integrated liquid-cooled battery housing structure, characterized in that, The battery box structure includes a box body (1), a coolant inlet pipe (2), a partition (3), and a coolant outlet pipe (4); a bottom plate is provided in the groove at the bottom of the box body (1), and the bottom plate has multiple parallel flow channels separated by ribs; two partitions (3) are respectively installed at the ends of the flow channels of the bottom plate; the partitions (3) are provided with openings communicating with each of the flow channels, and the partitions (3) and the box body (1) are combined to form a manifold; the end of the box body (1) is provided with an inlet (1.1) and an outlet (1.2); the inlet (1.1) is connected to one of the partitions (3) through the coolant inlet pipe (2), and the other partition (3) is connected to the outlet (1.2) through the coolant outlet pipe (4).

2. The parallel integrated liquid-cooled battery housing structure according to claim 1, characterized in that, The partition (3) has an L-shaped or U-shaped structure.

3. The parallel integrated liquid-cooled battery housing structure according to claim 1 or 2, characterized in that, The partition (3) is an aluminum alloy extrusion or stamping part.

4. The parallel integrated liquid-cooled battery housing structure according to claim 1, characterized in that, The partition (3) is installed at the end of the flow channel of the base plate by assembly or welding.

5. The parallel integrated liquid-cooled battery housing structure according to claim 1, characterized in that, Both the coolant inlet pipe (2) and the coolant outlet pipe (4) include a connector and a transition pipe; the coolant inlet pipe (2) and the coolant outlet pipe (4) are respectively installed on the inlet (1.1) and the outlet (1.2) through the connector, the connector is connected to the partition (3) through the transition pipe, and the transition pipe is connected to the manifold.

6. The parallel integrated liquid-cooled battery housing structure according to claim 5, characterized in that, The connector is a standard machined part.

7. The parallel integrated liquid-cooled battery housing structure according to claim 5, characterized in that, The transition fitting is a bent extruded aluminum alloy tube or a rubber sleeve.

8. The parallel integrated liquid-cooled battery housing structure according to claim 5, characterized in that, The joint and the transition pipe are fixedly connected to the housing (1) and the partition (3) by means of bolts, nuts or welding, respectively.

9. The parallel integrated liquid-cooled battery housing structure according to claim 1, characterized in that, The flow channel of the base plate is provided with thickened ribs.

10. The parallel integrated liquid-cooled battery housing structure according to claim 9, characterized in that, The thickened reinforcing bars are welded to the base plate by friction stir welding.

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