Integrated liquid cooling device for battery pack of new energy automobile

Abstract

The utility model belongs to the technical field of new energy automobile battery packs, and discloses a new energy automobile battery pack integrated liquid cooling device which comprises a battery pack shell, a controller is arranged in the battery pack shell, a main heat dissipation assembly is arranged at the top of the battery pack shell, the main heat dissipation assembly comprises a jet pump, and the jet pump is arranged in the battery pack shell. A main heat dissipation pipe is fixedly arranged at the front end of the jet pump, connecting plates are fixedly arranged on the left outer wall and the right outer wall of the main heat dissipation pipe, mounting plates are fixedly arranged on the left side and the right side of each connecting plate, and the mounting plates are fixed to the left side and the right side of the battery pack shell, so that all-directional heat dissipation covering of the battery pack shell is achieved; compared with a liquid cooling device with a single heat dissipation structure, the liquid cooling device has the advantages of higher heat dissipation efficiency and more uniform temperature distribution, and the problem of service life attenuation caused by local overheating of the battery pack is effectively avoided.

Description

Technical Field

[0001] This utility model belongs to the field of new energy vehicle battery pack technology, specifically an integrated liquid cooling device for new energy vehicle battery packs. Background Technology

[0002] The automotive battery pack is the core energy storage and power supply component of new energy vehicles. It is assembled from core units such as battery cells, battery modules, battery management system, thermal management system, mechanical protective structure and electrical connectors. Its main function is to store electrical energy and output electrical energy to the drive motor and on-board electrical equipment in a stable manner according to the vehicle's operating needs. At the same time, it can recover the vehicle's braking energy for reverse charging. It must meet the requirements of high energy density, high safety, long cycle life and adaptability to complex operating conditions such as high and low temperatures and vibration. It is a key assembly that determines the driving range, power performance and safety reliability of new energy vehicles.

[0003] New energy vehicle battery packs generate a lot of heat during charging and discharging. Liquid cooling devices are the core components that ensure battery performance. Under high-power conditions, the local temperature exceeds 50°C, which affects the battery's cycle life.

[0004] Therefore, an integrated liquid cooling device for new energy vehicle battery packs is proposed to address the above problems. Utility Model Content

[0005] To address the problems mentioned in the background section, this invention provides an integrated liquid cooling device for new energy vehicle battery packs, which has the advantages of high heat dissipation efficiency and precise temperature control.

[0006] To achieve the above objectives, this utility model provides the following technical solution: an integrated liquid cooling device for a new energy vehicle battery pack, comprising a battery pack housing, a controller inside the battery pack housing, a main heat dissipation assembly on the top of the battery pack housing, the main heat dissipation assembly including a jet pump, a main heat dissipation pipe fixedly mounted at the front end of the jet pump, connecting plates fixedly mounted on the left and right outer walls of the main heat dissipation pipe, and mounting plates fixedly mounted on the left and right sides of the connecting plates, and the mounting plates are fixed to the left and right sides of the battery pack housing.

[0007] Preferably, a phase change uniform conductivity layer is attached between the battery pack housing and the jet pump, and a temperature sensor is provided on the upper surface of the phase change uniform conductivity layer. The temperature sensor is electrically connected to the controller through a wire.

[0008] By adopting the above technical solution, the problem of uneven local temperature in the battery pack casing can be solved.

[0009] Preferably, a liquid collection chamber is fixedly provided on the rear side of the battery pack housing, and the liquid collection chamber is fixedly connected to the rear side of the jet pump, and a cooling chamber is fixedly provided on the front end of the battery pack housing.

[0010] By adopting the above technical solution, the supply of low-temperature coolant to the main heat dissipation component was achieved.

[0011] Preferably, the bottom of the battery pack housing is provided with an auxiliary heat dissipation component, which includes a heat dissipation plate and a heat dissipation circuit pipe is fixed inside the heat dissipation plate.

[0012] Preferably, the input end of the heat dissipation circuit pipe is fixedly connected to the cooling chamber through an auxiliary heat dissipation inlet pipe, the output end of the heat dissipation circuit pipe is fixedly connected to the liquid collection chamber through an auxiliary heat dissipation outlet pipe, and a booster pump is fixedly installed on the outside of both the auxiliary heat dissipation inlet pipe and the auxiliary heat dissipation outlet pipe.

[0013] By adopting the above technical solution, a coolant flow path is formed for the bottom heat dissipation branch.

[0014] Preferably, the bottom of the battery pack housing is provided with a reflux assembly, the reflux assembly includes a reflux pump fixedly connected to the output end of the main heat sink, and the reflux pump is located inside the liquid collection chamber. The output end of the reflux pump passes through the bottom of the liquid collection chamber and is fixedly provided with a reflux pipe. The output end of the reflux pipe is fixedly connected to the cooling chamber.

[0015] By adopting the above technical solution, the coolant can be recycled and reused.

[0016] Preferably, the main heat dissipation pipe and the connecting plate are made of aluminum alloy extruded profiles welded together, and the surface is coated with a ceramic coating.

[0017] By adopting the above technical solutions, the structural strength and excellent thermal conductivity of the components are guaranteed.

[0018] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0019] 1. This utility model adopts a dual heat dissipation layout with a top main heat dissipation component and a bottom auxiliary heat dissipation component, and constructs a fully closed-loop coolant circulation circuit with a liquid collection chamber, a cooling chamber and a return component, to achieve all-round heat dissipation coverage of the top and bottom areas of the battery pack shell. At the same time, the heat dissipation continuity is improved by the recycling of coolant, avoiding local overheating problems, and significantly optimizing the uniformity of battery pack temperature distribution and heat dissipation efficiency.

[0020] 2. This utility model achieves intelligent control of the heat dissipation system by bonding a phase change homogeneous conductive layer between the battery pack shell and the jet pump and configuring a temperature sensor, and by using aluminum alloy extruded profile welding process and ceramic coating on the main heat dissipation pipe and connecting plate. This is achieved through electrical connection between the temperature sensor and the battery pack controller. At the same time, it takes into account the thermal conductivity, structural strength, insulation and corrosion resistance of the components, which not only improves the accuracy of heat dissipation and energy consumption control level, but also enhances the reliability and service life of the device, and adapts to the complex working conditions of new energy vehicles. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0022] Figure 2 This is a schematic diagram of the main heat dissipation component structure of this utility model;

[0023] Figure 3 This is a schematic cross-sectional view of the main heat dissipation component of this utility model;

[0024] Figure 4 This is a schematic diagram of the overall bottom structure of this utility model;

[0025] Figure 5 This is a schematic diagram of the internal structure of the auxiliary heat dissipation component of this utility model.

[0026] In the diagram: 1. Battery pack casing; 2. Liquid collection chamber;

[0027] 3. Main heat dissipation assembly; 31. Jet pump; 32. Main heat pipe; 33. Connecting plate; 34. Mounting plate;

[0028] 4. Reflux assembly; 41. Reflux pump; 42. Reflux pipe;

[0029] 5. Cooling chamber;

[0030] 6. Auxiliary heat dissipation components; 61. Heat sink; 62. Heat dissipation circuit pipe; 63. Auxiliary heat dissipation inlet pipe; 64. Auxiliary heat dissipation outlet pipe. Detailed Implementation

[0031] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0032] The following describes an embodiment of this utility model based on its overall structure.

[0033] like Figures 1 to 5 As shown, this utility model provides an integrated liquid cooling device for a new energy vehicle battery pack, including a battery pack housing 1. A controller is provided inside the battery pack housing 1, and a main heat dissipation component 3 is provided on the top of the battery pack housing 1. The main heat dissipation component 3 includes a jet pump 31, and a main heat dissipation pipe 32 is fixedly provided at the front end of the jet pump 31, which serves as a carrier for heat conduction. Connecting plates 33 are fixedly provided on the left and right outer walls of the main heat dissipation pipe 32, and mounting plates 34 are fixedly provided on the left and right sides of the connecting plates 33. The mounting plates 34 are fixed to the left and right sides of the battery pack housing 1, ensuring the installation stability of the main heat dissipation component 3.

[0034] In a further embodiment, a phase change uniform conductivity layer is attached between the battery pack housing 1 and the jet pump 31. A temperature sensor is provided on the upper surface of the phase change uniform conductivity layer. The temperature sensor is electrically connected to the controller through a wire to monitor the battery pack temperature in real time. After the monitoring data is transmitted to the controller, intelligent control of the heat dissipation system can be realized.

[0035] A liquid collection chamber 2 is fixedly provided on the rear side of the battery pack housing 1 to store low-temperature coolant to be used for heat dissipation. The liquid collection chamber 2 is fixedly connected to the rear side of the jet pump 31 to realize the supply of low-temperature coolant to the main heat dissipation component 3. A cooling chamber 5 is fixedly provided on the front end of the battery pack housing 1 to collect high-temperature coolant after heat dissipation.

[0036] The bottom of the battery pack housing 1 is provided with an auxiliary heat dissipation component 6, which includes a heat dissipation plate 61. A heat dissipation circuit pipe 62 is fixed inside the heat dissipation plate 61, forming a liquid cooling path at the bottom of the battery pack. This works in conjunction with the main heat dissipation component 3 at the top, increasing the contact area between the battery pack housing 1 and the coolant, and improving overall heat dissipation efficiency. The heat dissipation circuit pipe 62 adopts a serpentine arrangement design (e.g., Figure 5 As shown in the figure, the area of ​​the inner side of the heat sink 61 is more than 90%, which can maximize the contact heat exchange area with the bottom of the battery pack. At the same time, the coolant flow direction of this circuit is opposite to that of the main heat dissipation circuit. The coolant of the main heat dissipation circuit flows from the liquid collection chamber (rear side) to the cooling chamber 5 (front side), and the coolant of the auxiliary heat dissipation circuit flows from the cooling chamber 5 (front side) to the liquid collection chamber 2 (rear side), forming a counter-current flow. This avoids the temperature superposition of the two coolants at the junction, further optimizes the uniformity of the overall temperature distribution of the battery pack, and can reduce the temperature difference between the top and bottom of the battery pack to within 2℃.

[0037] The input end of the heat dissipation circuit pipe 62 is fixedly connected to the cooling chamber 5 through the auxiliary heat dissipation inlet pipe 63, and the output end of the heat dissipation circuit pipe 62 is fixedly connected to the liquid collection chamber 2 through the auxiliary heat dissipation outlet pipe 64, so that the cooling chamber 5 and the liquid collection chamber 2 are connected to the main heat dissipation assembly 3 through the auxiliary heat dissipation assembly 6. A booster pump is fixedly installed on the outside of both the auxiliary heat dissipation inlet pipe 63 and the auxiliary heat dissipation outlet pipe 64 to provide additional power to the coolant of the auxiliary heat dissipation assembly 6 and ensure the flow rate of the coolant in the heat dissipation circuit pipe 62.

[0038] The bottom of the battery pack housing 1 is provided with a reflux assembly 4. The reflux assembly 4 includes a reflux pump 41 fixedly connected to the output end of the main heat dissipation pipe 32. The reflux pump 41 is located inside the liquid collection chamber 2. The output end of the reflux pump 41 passes through the bottom of the liquid collection chamber 2 and is fixedly provided with a reflux pipe 42. The output end of the reflux pipe 42 is fixedly connected to the cooling chamber 5, thus constructing a fully closed-loop coolant circulation circuit to realize the circulation, recycling and reuse of coolant.

[0039] The main heat pipe 32 and the connecting plate 33 are made of aluminum alloy extruded profiles welded together, and the surface is coated with a ceramic coating, which improves the corrosion resistance and insulation performance of the components and avoids the battery pack safety from being affected by coolant corrosion or leakage.

[0040] Among them, jet pumps, reflux pumps, and booster pumps are existing technologies and will not be described in detail.

[0041] Working principle and process of an integrated liquid cooling device for new energy vehicle battery packs:

[0042] When the temperature sensor detects that the temperature of the battery pack housing 1 has reached a preset threshold, the battery pack controller starts the jet pump 31, which draws coolant from the liquid collection chamber 2 at the rear of the battery pack housing 1, pressurizes it and delivers it to the main heat dissipation pipe 32 at the front end of the jet pump 31. The coolant after absorbing heat is output from the main heat dissipation pipe 32 and enters the return pump 41 inside the liquid collection chamber 2. The return pump 41 pressurizes and outputs the coolant after absorbing heat, and it flows into the cooling chamber 5 at the front end of the battery pack housing 1 through the return pipe 42, where it is cooled by the external cooling module.

[0043] The coolant cooled by the external cooling module in the cooling chamber 5 enters the heat dissipation circuit pipe 62 of the auxiliary heat dissipation assembly 6 through the auxiliary heat dissipation inlet pipe 63, driven by the booster pump outside the auxiliary heat dissipation inlet pipe 63. When the low-temperature coolant flows in the serpentine heat dissipation circuit pipe 62, it exchanges heat with the heat dissipation plate 61 attached to the bottom of the battery pack, absorbing the heat from the bottom of the battery pack. The high-temperature coolant after absorbing heat is driven by the booster pump outside the auxiliary heat dissipation outlet pipe 64 and flows back to the liquid collection chamber 2 through the auxiliary heat dissipation outlet pipe 64. The liquid collection chamber 2 collects the high-temperature coolant and the high-temperature coolant returning from the main heat dissipation circuit, and re-inputs it into the cooling chamber 5 for cooling by the external cooling module, thus completing the coolant recycling of the auxiliary heat dissipation circuit.

[0044] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0045] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. An integrated liquid cooling device for a new energy vehicle battery pack, comprising a battery pack housing (1), characterized in that: The battery pack housing (1) is equipped with a controller inside. The top of the battery pack housing (1) is equipped with a main heat dissipation component (3). The main heat dissipation component (3) includes a jet pump (31). The front end of the jet pump (31) is fixedly equipped with a main heat dissipation pipe (32). The left and right outer walls of the main heat dissipation pipe (32) are both fixedly equipped with connecting plates (33). The left and right sides of the connecting plates (33) are both fixedly equipped with mounting plates (34), and the mounting plates (34) are fixed to the left and right sides of the battery pack housing (1).

2. The integrated liquid cooling device for a new energy vehicle battery pack according to claim 1, characterized in that: A phase change uniform conduction layer is attached between the battery pack housing (1) and the jet pump (31). A temperature sensor is provided on the upper surface of the phase change uniform conduction layer, and the temperature sensor is electrically connected to the controller through a wire.

3. The integrated liquid cooling device for a new energy vehicle battery pack according to claim 1, characterized in that: The rear side of the battery pack housing (1) is fixedly provided with a liquid collection chamber (2), which is fixedly connected to the rear side of the jet pump (31), and the front end of the battery pack housing (1) is fixedly provided with a cooling chamber (5).

4. The integrated liquid cooling device for a new energy vehicle battery pack according to claim 3, characterized in that: The bottom of the battery pack housing (1) is provided with an auxiliary heat dissipation component (6), which includes a heat dissipation plate (61) and a heat dissipation circuit pipe (62) is fixed inside the heat dissipation plate (61).

5. The integrated liquid cooling device for a new energy vehicle battery pack according to claim 4, characterized in that: The input end of the heat dissipation circuit pipe (62) is fixedly connected to the cooling chamber (5) through the auxiliary heat dissipation inlet pipe (63), and the output end of the heat dissipation circuit pipe (62) is fixedly connected to the liquid collection chamber (2) through the auxiliary heat dissipation outlet pipe (64). A booster pump is fixedly installed on the outside of both the auxiliary heat dissipation inlet pipe (63) and the auxiliary heat dissipation outlet pipe (64).

6. The integrated liquid cooling device for a new energy vehicle battery pack according to claim 3, characterized in that: The bottom of the battery pack housing (1) is provided with a reflux assembly (4). The reflux assembly (4) includes a reflux pump (41) fixedly connected to the output end of the main heat sink (32). The reflux pump (41) is located inside the liquid collection chamber (2). The output end of the reflux pump (41) passes through the bottom of the liquid collection chamber (2) and is fixedly provided with a reflux pipe (42). The output end of the reflux pipe (42) is fixedly connected to the cooling chamber (5).

7. The integrated liquid cooling device for a new energy vehicle battery pack according to claim 1, characterized in that: The main heat dissipation pipe (32) and the connecting plate (33) are made of aluminum alloy extruded profiles welded together, and the surface is coated with ceramic.

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