Battery liquid cooling pipeline system

Abstract

The utility model provides a battery liquid cooling pipeline system which comprises a different-stroke pipeline system, the different-stroke pipeline system comprises a liquid cooling pipeline, a switch valve, a tee joint and a battery cluster branch, the liquid cooling pipeline comprises a first-stage pipeline, a second-stage pipeline and a third-stage pipeline, and the battery cluster branch comprises a second-stage pipeline and a battery pack branch. The battery pack branch comprises a three-stage pipeline and a liquid cooling plate; the switch valve and the tee joint are arranged on the secondary pipeline; the switch valves are used for adjusting the flow of the battery cluster branches; and the tee joint connected with the third-stage pipeline is used for adjusting the flow of the battery pack branch. According to the utility model, the switch valves are used for adjusting the flow distribution among the battery cluster branches, so that the flow distribution among the battery cluster branches is consistent without newly adding part models and increasing cost, and further, the tee joint connected with the three-stage pipeline is used for adjusting the flow among the battery pack branches, so that the flow distribution among the battery pack branches is consistent, and the flow distribution efficiency is improved. The problem that the flow distribution consistency of a different-stroke pipeline system is poor is solved.

Description

Technical Field

[0001] The utility model relates to the technical field of battery energy storage, in particular to a battery liquid cooling pipeline system. Background Art

[0002] The thermal management technology route of battery energy storage products has begun to shift from mature air cooling technology to liquid cooling technology. Liquid cooling technology has the advantages of making products more integrated, safer and more suitable for long-term energy storage. The market has higher and higher requirements for the energy density per unit volume of energy storage products, which also puts higher requirements on the rationality of the layout of the liquid cooling pipeline system, one of the key subsystems in liquid cooling technology products. In order to ensure the temperature consistency of each battery pack and long life, the liquid cooling pipeline branches where each battery pack is located are generally connected in parallel. There are two layout methods: the same-pass pipeline and the different-pass pipeline. Among them, the same-pass layout method has problems such as large space size, interference with top lighting, fire protection and other systems, and low energy density per unit volume of energy storage products such as energy storage containers and energy storage cabinets; the different-pass pipeline system has the advantages of flexible structural layout, small space size, and high energy density per unit volume compared to the same-pass pipeline, but the pipes and flow resistances of the liquid cooling pipeline branches where each battery pack is located are different, resulting in different flow resistances between branches, resulting in uneven flow distribution of different-pass pipelines, and then resulting in poor temperature consistency of system batteries.

[0003] Currently, there are two types of arrangements for the different-flow piping systems. One type uses automatic flow control valves to control the flow distribution of each battery pack liquid cooling pipe branch to be consistent. The automatic flow control valves involved in this method are costly and have complex control strategies. The other type adjusts the inner diameter of each tee until the flow distribution meets the flow distribution control target. This method involves many parts models, and the parts production, installation and management are complex. Utility Model Content

[0004] The technical problem to be solved by the utility model is to overcome the defects of poor consistency of flow distribution in different-path pipeline systems in the prior art, which are complex to control and high cost, and to provide a battery liquid cooling pipeline system.

[0005] The utility model solves the above technical problems through the following technical solutions:

[0006] The utility model provides a battery liquid cooling pipeline system, comprising a different-path pipeline system, the different-path pipeline system comprising a liquid cooling pipeline, a switch valve, a tee and a battery cluster branch, the liquid cooling pipeline comprising a primary pipeline, a secondary pipeline and a tertiary pipeline, the battery cluster branch comprising a secondary pipeline and a battery pack branch, the battery pack branch comprising a tertiary pipeline and a liquid cooling plate; the switch valve and the tee are both arranged on the secondary pipeline;

[0007] The secondary pipeline is connected to the primary pipeline and the tertiary pipeline respectively through the tee, and the tertiary pipeline is connected to the liquid cooling plate;

[0008] The switch valve is used to adjust the flow of the battery cluster branch;

[0009] The tee connected to the tertiary pipeline is used to adjust the flow of the battery pack branch.

[0010] Preferably, there are multiple battery cluster branches, and the battery cluster branches are connected in parallel.

[0011] Preferably, the flow distribution between the battery cluster branches is made consistent by adjusting the opening of the switch valve on the secondary pipeline in each battery cluster branch.

[0012] Preferably, there are multiple battery pack branches, and the battery pack branches are connected in parallel.

[0013] Preferably, the flow distribution between the battery pack branches is made consistent by adjusting the cross-sectional area of ​​the pipe diameter of the tee from the secondary pipeline to the tertiary pipeline.

[0014] Preferably, the different-path piping system further includes a liquid cooler;

[0015] The liquid inlet and the liquid outlet of the liquid cooling machine are both connected to the primary pipeline.

[0016] Preferably, the liquid cooler is used to provide high and low temperature circulating coolant to the battery liquid cooling pipeline system.

[0017] Preferably, the liquid cooling pipeline is used to transport the coolant to the liquid cooling plate in the battery pack branch.

[0018] Preferably, the liquid cooling plate is used to exchange heat with the batteries in the battery pack branch.

[0019] Preferably, the liquid cooler comprises a circulation pump;

[0020] The circulation pump is used to provide circulation power to the battery liquid cooling pipeline system.

[0021] On the basis of conforming to the common sense in the art, the above-mentioned preferred conditions can be arbitrarily combined to obtain the preferred embodiments of the present utility model.

[0022] The positive and progressive effects of the utility model are:

[0023] The utility model utilizes the switch valve on the secondary pipeline to adjust the flow distribution between the battery cluster branches, so that the flow distribution between the battery cluster branches is consistent, no new component models are required, no cost increase, and the flow can be adjusted conveniently without polarization. Furthermore, the three-way connection connected to the tertiary pipeline on the secondary pipeline is utilized to adjust the flow between the battery pack branches, so that the flow distribution between the battery pack branches is consistent, which can conveniently, quickly and at a low cost solve the problem of poor consistency in flow distribution in the different-path pipeline system. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 This is a first structural schematic diagram of a battery liquid cooling pipeline system according to a preferred embodiment of the utility model.

[0025] Figure 2 This is a second structural schematic diagram of the battery liquid cooling pipeline system of a preferred embodiment of the utility model. DETAILED DESCRIPTION

[0026] The present invention will be described more clearly and completely below by way of embodiments in conjunction with the accompanying drawings. The description of the embodiments is intended to help understand the present invention but does not constitute a limitation on the present invention.

[0027] This embodiment provides a battery liquid cooling pipeline system, including a different-path pipeline system, such as Figure 1 As shown, the different-path piping system includes a liquid cooling pipeline, switch valves 301, 302, ... 30 (n), n is 1, 2, 3, 4, 5, 6, etc., generally not exceeding 10; tees 401, 402, ... 40 (m), etc., m is 1, 2, 3, 4, 5, 6, etc., generally not exceeding 10; and a battery cluster branch, the liquid cooling pipeline includes a primary pipeline 201, a secondary pipeline 202 and a tertiary pipeline 203, the battery cluster branch includes a secondary pipeline 202 and a battery pack branch, the battery pack branch includes a tertiary pipeline 203 and a liquid cooling plate; the switch valve and the tee are both arranged on the secondary pipeline; it should be noted that each battery cluster branch includes a secondary pipeline 202, a battery pack branch, n switch valves, and m pairs of tees; each battery pack branch includes a tertiary pipeline 203 and a liquid cooling plate;

[0028] The secondary pipeline is connected to the primary pipeline and the tertiary pipeline through a tee, and the tertiary pipeline is connected to the liquid cooling plate;

[0029] A switch valve is used to adjust the flow of the battery cluster branch;

[0030] The tee connected to the tertiary pipeline is used to adjust the flow of the battery pack branch.

[0031] In this embodiment, the tee connected to the primary pipeline is used to distribute flow to the battery pack branch.

[0032] In an optional embodiment, there are multiple battery cluster branches, and the battery cluster branches are connected in parallel.

[0033] In an optional embodiment, the flow distribution between the battery cluster branches is made consistent by adjusting the opening of the switch valve on the secondary pipeline in each battery cluster branch.

[0034] In the specific implementation process, each battery cluster branch has a corresponding flow meter, and each flow meter is used to detect the current flow of each battery cluster branch. If the current flow is greater than the preset flow of the battery cluster branch, the opening of the switch valve corresponding to the battery cluster is increased; if the current flow is greater than the preset flow of the battery cluster branch, the opening of the switch valve corresponding to the battery cluster is decreased, so that the flow distribution between each battery cluster branch is consistent.

[0035] In an optional embodiment, there are multiple battery pack branches, and the battery pack branches are connected in parallel.

[0036] In an optional embodiment, the flow distribution between the battery pack branches is made consistent by adjusting the cross-sectional area of ​​the pipe diameter of the tee from the secondary pipeline to the tertiary pipeline.

[0037] During the specific implementation process, the real-time flow of each battery pack branch is detected by an external flow meter. If the real-time flow is greater than the preset flow of the battery pack branch, the cross-sectional area of ​​the pipe diameter of the tee from the secondary pipeline in the battery pack branch to the tertiary pipeline is reduced. If the real-time flow is less than the preset flow of the battery pack branch, the cross-sectional area of ​​the pipe diameter of the tee from the secondary pipeline in the battery pack branch to the tertiary pipeline is increased, so that the flow distribution between each battery pack branch is consistent.

[0038] It should be noted that, in this embodiment, the cross-sectional area of ​​the tee pipe diameter for adjusting the flow from the secondary pipeline to the tertiary pipeline can be achieved through theoretical calculation and simulation, which is convenient, fast and low-cost.

[0039] In this embodiment, by adjusting the opening of the switch valves 301, 302 on the secondary liquid inlet pipeline 202 of each battery cluster branch, the flow distribution between each battery cluster branch is consistent, and is no longer limited by the uneven flow distribution caused by the different pipes of the liquid cooler outlet, which leads to large battery temperature difference and life safety performance degradation. Furthermore, the flow distribution between the battery pack branches is consistent by adjusting the cross-sectional area of ​​the tees 401, 402, ... 40 (m) of the secondary pipeline 202 flowing to the tertiary pipeline 203.

[0040] This embodiment utilizes the switch valve on the secondary pipeline to adjust the flow distribution between each battery cluster branch, so that the flow distribution between each battery cluster branch is consistent, without adding new component models, no cost increase, and the flow can be adjusted conveniently without polarization. Furthermore, the three-way valve on the secondary pipeline connected to the tertiary pipeline is used to adjust the flow between each battery pack branch, so that the flow distribution between each battery pack branch is consistent, which can conveniently, quickly and cost-effectively solve the problem of poor consistency in flow distribution in different-process pipeline systems.

[0041] In an optional embodiment, the different-path piping system further includes a liquid cooler;

[0042] The liquid inlet 101 and the liquid outlet 102 of the liquid cooling machine are both connected to the primary pipeline 201 .

[0043] In an optional embodiment, a liquid cooler is used to provide high and low temperature circulating coolant to the battery liquid cooling pipeline system.

[0044] In an optional embodiment, a liquid cooling pipeline is used to transport the coolant to the liquid cooling plate in the battery pack branch.

[0045] In an optional embodiment, a liquid cooling plate is used to exchange heat with the batteries in the battery pack branch.

[0046] In an optional embodiment, the liquid cooler includes a circulation pump;

[0047] The circulation pump is used to provide circulation power to the battery liquid cooling pipeline system.

[0048] In this embodiment, the liquid cooler provides high and low temperature circulating coolant for the battery liquid cooling pipeline system. The liquid cooling pipeline transports the coolant to the liquid cooling plate in each battery pack branch. The liquid cooling plate exchanges heat with the batteries in the battery pack branch to ensure that the battery is always within the appropriate operating temperature range, thereby extending the service life of the battery energy storage product and improving safety.

[0049] Furthermore, a circulation pump arranged in the liquid cooler provides circulation power for the coolant in the battery liquid cooling pipeline system.

[0050] Furthermore, the liquid cooling pipeline includes a primary pipeline, a secondary pipeline and a tertiary pipeline. The primary pipeline is connected to the liquid cooling inlet and outlet of the liquid cooling machine with the secondary pipeline, the secondary pipeline is connected to the primary pipeline and the tertiary pipeline through a tee, and the tertiary pipeline and the secondary pipeline are connected to the liquid cooling plate in the battery pack branch.

[0051] Furthermore, a pair of secondary cooling liquid inlet and outlet pipes, several pairs of tertiary cooling liquid inlet and outlet pipes and a battery pack branch connected to the tertiary pipes constitute a battery cluster branch. It should be noted that the battery cluster branches in the embodiments involved in the present utility model patent are exactly the same, and the liquid cooling pipes between the battery cluster branches are in parallel.

[0052] Furthermore, a pair of three-stage cooling liquid inlet and outlet pipes and a liquid cooling plate in a battery pack branch connected thereto form a battery pack branch, and each battery pack branch is connected in parallel.

[0053] Furthermore, the flow direction of the coolant in the battery liquid cooling pipeline system is: driven by the circulating pump, it flows from the liquid outlet of the liquid cooler through the primary pipeline and is diverted to the secondary pipeline in each battery cluster branch through several identical tees distributed on the primary pipeline, and when flowing through the secondary pipeline, it is diverted to each tertiary pipeline by several tees distributed on the secondary pipeline, and after flowing through the tertiary pipeline, it enters the liquid cooling plate of the battery pack branch, and when flowing through the liquid cooling plate, the coolant exchanges heat with the batteries in the battery pack branch and then flows out of the liquid cooling plate and enters the tertiary pipeline, and then each liquid cooling pipeline branch converges to the secondary pipeline, and each secondary pipeline converges to the primary pipeline and returns to the liquid return port of the liquid cooler, completing a liquid cooling cycle.

[0054] Furthermore, when the coolant is distributed to the secondary pipelines in each battery cluster branch through the same tees on the primary pipeline, the flow distribution between the battery cluster branches is uneven due to the different pipe paths of the liquid outlet of the liquid cooler. This embodiment adjusts the opening (i.e., the opening angle) of the switch valve on the secondary liquid inlet pipeline of each battery cluster branch to ensure consistent flow distribution between the battery cluster branches.

[0055] Furthermore, when the coolant flows through the secondary pipeline and is diverted to the battery pack branch through the tees distributed on the secondary pipeline, since the battery pack branches in the battery cluster branch are arranged vertically, if the tees of the battery pack branches are still consistent, the flow distribution will be uneven due to gravity and different pipe paths. This embodiment makes the flow distribution of the battery pack branches consistent by adjusting the cross-sectional area of ​​the tee diameter from the secondary pipeline to the tertiary pipeline.

[0056] It should be noted that this embodiment uses the switch valve on the secondary pipeline to adjust the flow distribution between the battery cluster branches, without adding new parts and models, and is easy to adjust. Furthermore, the cross-sectional area of ​​the three-way pipe diameter from the secondary pipeline to the tertiary pipeline is adjusted to make the flow distribution of the battery pack branches consistent.

[0057] In addition, it can also be flexibly divided into two types: completely consistent flow distribution and flow distribution in line with set targets. The so-called completely consistent flow distribution means that the purpose of completely consistent flow distribution is achieved by adjusting the cross-sectional area of ​​the three-way pipe diameter connected to each battery pack branch in the battery cluster branch. The achievement of this goal requires that the three-way pipe diameters connected to each battery pack branch are different, that is, the three-way models are different; and the flow distribution in line with the set target means that under the premise of meeting the battery service life and safety performance requirements, the three-way pipe diameters connected to each battery pack branch are grouped and designed, and the inner diameter of the tee in each group is exactly the same, so as to reduce component models and facilitate component management.

[0058] In the specific implementation process, take the number of battery cluster branches as 5 as an example, for example, Figure 2 As shown, the liquid cooling circuit includes a primary pipeline 201, a secondary pipeline 202 and a tertiary pipeline 203; switch valves 301, 302, 303, 304, 305; tees 401, 402, 403, 404, 405, and also includes a liquid cooling plate in the battery pack branch.

[0059] In this embodiment, 101 is specified as the liquid inlet and 102 is specified as the liquid outlet. The coolant flows from the liquid inlet 101 through the primary pipeline 201 to the secondary pipeline 202 in each battery cluster branch. After flowing through the secondary pipeline 202, the coolant is diverted to each battery pack branch in each battery cluster branch through the tees 401, 402, 403, 404, and 405; wherein the battery pack branch includes the tertiary pipeline 203 and the liquid cooling plate in the battery pack 5.

[0060] By adjusting the opening of the switch valves 301, 302, 303, 304, 305 on the secondary inlet pipeline 202 of each battery cluster branch, the flow distribution between each battery cluster branch is made consistent. Further, by adjusting the cross-sectional area of ​​the tees 401, 402, 403, 404, 405 from the secondary pipeline 202 to the tertiary pipeline 203, the flow distribution of the battery pack branches is made consistent.

[0061] This embodiment does not require new component models when adjusting the flow distribution between the battery cluster branches, and the adjustment is convenient; the diameter cross-sectional area of ​​the tees 401, 402, 403, 404, and 405 for adjusting the flow from the secondary pipeline 202 to the tertiary pipeline 203 can be achieved through theoretical calculation and simulation in the scheme, which is low-cost.

[0062] It should be noted that the number of battery cluster branches involved in this embodiment is 5 and the number of battery pack branches is also 5, which are only for illustration of this embodiment. Any number in the actual battery liquid cooling pipeline system is also regarded as the same technical solution as the present utility model.

[0063] This embodiment improves the consistency of flow distribution between each battery cluster branch and the consistency of flow distribution between each battery pack branch by combining the opening of the switch valve and the cross-sectional area of ​​the three-way pipe diameter. Specifically, the flow distribution between each battery cluster can be made consistent by using a graduated valve or a calibrated valve opening angle, and at the same time, the flow distribution between each battery pack branch in the battery cluster branch can be made consistent by adjusting the diameter of the three-way pipe diverted to the battery pack branch, eliminating the influence of inconsistent flow distribution on the consistency of battery temperature in the battery liquid cooling pipeline system.

[0064] Although the specific implementations of the utility model are described above, those skilled in the art should understand that this is only an example, and the protection scope of the utility model is defined by the attached claims. Those skilled in the art can make various changes or modifications to these implementations without departing from the principle and essence of the utility model, but these changes and modifications fall within the protection scope of the utility model.

Claims

1. A battery liquid cooling pipeline system, including a different-path pipeline system, characterized in that: The different-path pipeline system includes a liquid cooling pipeline, a switch valve, a tee and a battery cluster branch. The liquid cooling pipeline includes a primary pipeline, a secondary pipeline and a tertiary pipeline. The battery cluster branch includes a secondary pipeline and a battery pack branch. The battery pack branch includes a tertiary pipeline and a liquid cooling plate. The switch valve and the tee are both arranged on the secondary pipeline. The secondary pipeline is connected to the primary pipeline and the tertiary pipeline respectively through the tee, and the tertiary pipeline is connected to the liquid cooling plate; The switch valve is used to adjust the flow of the battery cluster branch; The tee connected to the tertiary pipeline is used to adjust the flow of the battery pack branch.

2. The battery liquid cooling pipeline system according to claim 1, characterized in that: There are multiple battery cluster branches, and the battery cluster branches are connected in parallel.

3. The battery liquid cooling pipeline system according to claim 2, characterized in that: By adjusting the opening of the switch valve on the secondary pipeline in each battery cluster branch, the flow distribution between the battery cluster branches is made consistent.

4. The battery liquid cooling pipeline system according to claim 1, characterized in that: There are multiple battery pack branches, and each battery pack branch is connected in parallel.

5. The battery liquid cooling pipeline system according to claim 4, characterized in that: By adjusting the cross-sectional area of ​​the pipe diameter of the tee from the secondary pipeline to the tertiary pipeline, the flow distribution between the battery pack branches is made consistent.

6. The battery liquid cooling pipeline system according to claim 1, characterized in that: The different-path piping system also includes a liquid cooler; The liquid inlet and the liquid outlet of the liquid cooling machine are both connected to the primary pipeline.

7. The battery liquid cooling pipeline system according to claim 6, characterized in that: The liquid cooler is used to provide high and low temperature circulating coolant to the battery liquid cooling pipeline system.

8. The battery liquid cooling pipeline system according to claim 1, characterized in that: The liquid cooling pipeline is used to transport the cooling liquid to the liquid cooling plate in the battery pack branch.

9. The battery liquid cooling pipeline system according to claim 1, characterized in that: The liquid cooling plate is used to exchange heat with the batteries in the battery pack branch.

10. The battery liquid cooling pipeline system according to claim 6, characterized in that: The liquid cooler includes a circulation pump; The circulation pump is used to provide circulation power to the battery liquid cooling pipeline system.

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