New energy power battery multi-branch flow distribution system

Abstract

The utility model discloses a multi-branch flow distribution system for a new energy power battery, and belongs to the technical field of battery thermal management. The heat management system comprises a heat management unit and a four-way flow distributor connected with the heat management unit through a pipeline, the four-way flow distributor comprises a first water segregator, a first adjusting valve, a second adjusting valve and a third adjusting valve, and the first adjusting valve, the second adjusting valve and the third adjusting valve are connected with the first water segregator and divided into three branches A, B and C; the third regulating valve is connected with the second water segregator through a pipeline and divided into three branches C1, C2 and C3 along three output ports of the second water segregator, two battery packs and a flow meter are connected to each branch in series, the C1, C2 and C3 are connected with the third water segregator through pipelines, the branches A and B and the third water segregator are connected with the water collector through pipelines, the water collector is connected with the heat management unit through a pipeline, and circulation is completed. The four-way flow distributor is used for replacing a traditional water segregator or a water segregator and a regulating valve, and accurate regulation and control of the temperature of the battery pack are achieved.

Description

Technical Field

[0001] The utility model belongs to the technical field of battery thermal management, in particular to a multi-branch flow distribution system for new energy power batteries. Background Art

[0002] As energy shortages and environmental issues have attracted much attention, pure electric engineering vehicles are becoming more and more widely used. The power battery is the energy source of the entire vehicle, and the cooling system maintains the power battery in the best working condition during charging and discharging. The cooling system plays an important role in battery performance, attenuation and safety issues. Therefore, new energy vehicles must be equipped with a suitable cooling system.

[0003] After searching, the Chinese utility model patent: Battery Thermal Management Flow Balancing System (publication number: CN214099694U, publication date: 2021.08.31) includes a thermal management circulation path, multiple flow regulation paths, multiple regulating valves, and multiple battery packs. The multiple flow regulation paths are arranged in parallel and connected to the thermal management circulation path respectively. Each flow regulation path is equipped with at least one regulating valve and at least one battery pack. The regulating valve is used to regulate the flow of the medium flowing through the corresponding battery pack. The traditional solution uses a water distributor or a combination of a water distributor and a regulating valve. The flow regulation procedure is too complicated, making it difficult to achieve precise control of the battery pack temperature. Utility Model Content

[0004] 1. Technical problems to be solved by the utility model

[0005] The purpose of the present utility model is to solve the problem that the existing cooling system uses a water distributor or a combination of a water distributor and a regulating valve, and the procedure for regulating the flow through the pipeline is too complicated, making it difficult to quickly and accurately control the battery pack temperature.

[0006] 2. Technical solution

[0007] In order to achieve the above-mentioned purpose, the technical solution provided by the present utility model is:

[0008] The utility model provides a multi-branch flow distribution system for a new energy power battery, characterized in that it comprises a thermal management unit and a four-way flow distributor connected to the thermal management unit through a pipeline, the four-way flow distributor comprising a water distributor 1 and a regulating valve 1, a regulating valve 2 and a regulating valve 3 respectively connected to a joint 1, a joint 2 and a joint 3 of the water distributor 1, the four-way flow distributor is divided into three branches A, B and C along the regulating valve 1, the regulating valve 2 and the regulating valve 3:

[0009] Branch A: The lower end of the regulating valve is connected to the temperature regulating pipeline and water collector of the battery pack through pipes in sequence;

[0010] Branch B: The lower end of the second regulating valve is connected to the temperature regulating pipeline and water collector of the battery pack through pipelines in sequence;

[0011] Branch C: The regulating valve 3 is connected to the water distributor 2 through a pipeline. The three branches are divided into C1, C2, and C3 along the three output ports of the water distributor 2. Each branch C1, C2, and C3 is connected to the temperature control pipeline of the battery pack and different input ports of the water distributor 3 through a pipeline along different output ports of the water distributor 2. The water distributor 3 is connected to the water collector through a pipeline.

[0012] The water collector includes a liquid infusion port and a gas infusion port. The liquid infusion port forms two branches through a pipeline. One branch is connected to the input end of the thermal management unit through a pipeline, and the other branch is connected to the expansion kettle through a pipeline. The gas infusion port is directly connected to the expansion kettle through a pipeline; the A, B, C1, C2, and C3 branches are simultaneously installed with flow meters in series.

[0013] Preferably, the water distributor 1 includes a steel pipe and a fixed bracket fixedly connected to the steel pipe, fixed sealing plates are fixedly connected to both ends of the steel pipe, and the steel pipe is also fixedly connected to joint 1, joint 2, joint 3 and joint 4.

[0014] Preferably, the steel pipe is fixed together with joint 1, joint 2 and joint 3 along the same axial direction.

[0015] Preferably, the steel pipe is connected to regulating valve one, regulating valve two and regulating valve three through the lower ends of joint one, joint two and joint three respectively.

[0016] Preferably, the regulating valve 1 and regulating valve 2 are Φ16 stainless steel butterfly handle ball valves, and the regulating valve 3 is a Φ25 stainless steel butterfly handle ball valve.

[0017] Preferably, the diameter of the four-way flow distributor pipeline connected to the thermal management unit is 25 mm, the diameter of the pipelines A, B, C1, C2, and C3 is 16 mm, the diameter of the pipelines between the four-way flow distributor and water distributor 2, water distributor 2 and water distributor 3, and water distributor 3 and the thermal management unit is 25 mm, and the diameter of the pipeline between the water collector and the expansion kettle is 8 mm.

[0018] 3. Beneficial effects

[0019] Compared with the prior art, the technical solution provided by this utility model has the following beneficial effects:

[0020] The utility model discloses a multi-branch flow distribution system for a new energy power battery, comprising a thermal management unit and a four-way flow distributor connected to the thermal management unit through a pipeline. The four-way flow distributor comprises a water distributor and a regulating valve one, a regulating valve two and a regulating valve three connected to the water distributor one. The four-way flow distributor is divided into three branches A, B and C along the regulating valve one, the regulating valve two and the regulating valve three. The regulating valve three is connected to the water distributor two through a pipeline and is divided into three branches C1, C2 and C3 along the three output ports of the water distributor two. Two battery packs and a flow meter are connected in series on each branch. C1, C2 and C3 are connected to the water distributor three through a pipeline. The A and B branches and the water distributor three are connected to the water collector along the pipeline. The water collector is connected to the thermal management unit along the pipeline to complete the circulation. The four-way flow distributor replaces the traditional water distributor or the water distributor plus the regulating valve, thereby avoiding the complicated flow regulation procedure and realizing the precise control of the battery pack temperature. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 This is a schematic diagram of the overall structure of a new energy power battery multi-branch flow distribution system of the present utility model;

[0022] Figure 2 It is the front view of the four-way flow distributor;

[0023] Figure 3 It is a front view of the water distributor 1;

[0024] Figure 4 This is a structural diagram of water distributor 1.

[0025] Explanation of the numbers in the schematic diagram:

[0026] 100. Thermal management unit;

[0027] 200, four-way flow distributor; 210, water distributor 1; 211, connector 1; 212, connector 2; 213, connector 3; 214, fixed cover plate; 215, connector 4; 216, steel pipe; 217, fixed bracket; 220, regulating valve 1; 230, regulating valve 2; 240, regulating valve 3;

[0028] 300, water distributor 2; 400, battery pack; 500, water distributor 3; 600, water collector; 700, expansion kettle. DETAILED DESCRIPTION

[0029] In order to enable those skilled in the art to better understand the present invention, the following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments in the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts should fall within the scope of protection of this application.

[0030] It should be noted that the terms "first," "second," and the like in the specification and claims of the present application and the accompanying drawings are used to distinguish similar objects and are not necessarily used to describe a specific order or precedence. It should be understood that the numbers used in this manner are interchangeable where appropriate for the embodiments of the present application described herein. In addition, the terms "including" and "having," and any variations thereof, are intended to cover non-exclusive inclusions. For example, a process, method, system, product, or apparatus comprising a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units that are not explicitly listed or inherent to these processes, methods, products, or apparatus.

[0031] In this application, terms such as "upper," "lower," "left," "right," "front," "back," "top," "bottom," "inner," "outer," "center," "vertical," "horizontal," "transverse," and "longitudinal" indicate positions or locations based on the positions or locations shown in the accompanying drawings. These terms are primarily intended to better describe this application and its embodiments and are not intended to limit the devices, elements, or components indicated to having a specific orientation, or to being constructed or operated in a specific orientation.

[0032] Furthermore, some of the above terms may be used to express other meanings besides indicating a position or location. For example, the term "on" may also be used to indicate a dependency or connection in certain circumstances. Those skilled in the art will understand the specific meanings of these terms in this application based on the specific circumstances.

[0033] Furthermore, the terms "installed," "disposed," "provided with," "connected," "connected," and "socketed" should be interpreted broadly. For example, they can refer to fixed connections, removable connections, or integral structures; mechanical connections or electrical connections; direct connections, indirect connections through an intermediary, or internal communication between two devices, elements, or components. Those skilled in the art will understand the specific meanings of these terms in this application based on the specific circumstances.

[0034] It should be noted that, in the absence of conflict, the embodiments and features of the embodiments in this application can be combined with each other. The present application will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0035] Example 1

[0036] Refer to the attached Figure 1-4 In this embodiment, a multi-branch flow distribution system for a new energy power battery includes a thermal management unit 100, which is used to store liquid for cooling or heating the battery and regulate and manage the liquid; the output end of the thermal management unit 100 is connected to a four-way flow distributor 200 through a pipeline, and the four-way flow distributor 200 is used to distribute and regulate the liquid flowing through the pipeline. The four-way flow distributor 200 includes a water distributor 1 210, a regulating valve 1 220, a regulating valve 230, and a regulating valve 3 240.

[0037] The water distributor 1 210 includes a steel pipe 216 and a fixing bracket 217 welded to the steel pipe 216, and the fixing bracket 217 is used to fix the four-way flow distributor 200; the steel pipe 216 is welded to the joint 1 211, the joint 2 212 and the joint 3 213 along the same pipe axis direction, and the lower ends of the joint 1 211, the joint 2 212 and the joint 3 213 are respectively connected to the regulating valve 1 220, the regulating valve 2 230 and the regulating valve 3 240 in a one-to-one correspondence. The liquid passing through the steel pipe 216 is distributed from the joint 1 211, the joint 2 212 and the joint 3 213, and is discharged through the regulating valve 1 22 0. The regulating valve 230 and the regulating valve 3 240 flow to the subsequent pipeline; fixed sealing plates 214 are welded at both ends of the steel pipe 216, and the fixed sealing plates 214 are used to seal the two ends of the steel pipe 216 to ensure that the liquid flowing through the steel pipe 216 flows out from the joint 1 211, the joint 2 212 and the joint 3 213; a joint 4 215 is also welded on the steel pipe 216, and the joint 4 215 is connected to the output end of the thermal management unit 100 through a pipeline, so that the liquid in the thermal management unit 100 flows to the four-way flow distributor 200 through the pipeline, and subsequent flow distribution is carried out from the four-way flow distributor 200.

[0038] The regulating valve 1 220 and the regulating valve 2 230 are Φ16 stainless steel butterfly handle ball valves, and the regulating valve 3 240 is a Φ25 stainless steel butterfly handle ball valve. By adjusting the opening of the regulating valve 1 220, the regulating valve 2 230 and the regulating valve 3 240, the flow in the system is distributed and regulated.

[0039] The four-way flow distributor 200 divides the three different branches A, B, and C along the regulating valve 1 220, regulating valve 2 230, and regulating valve 3 240:

[0040] Branch A: The four-way flow distributor 200 is connected to a pipeline at the lower end of the regulating valve 220, which is then connected to the temperature regulation pipeline of the battery pack 400 and the water collector 600. The liquid flowing through the four-way flow distributor 200 enters the temperature regulation pipeline of the battery pack 400 through the regulating valve 220, exchanges heat with the battery pack 400, and then flows to the water collector 600.

[0041] Branch B: The four-way flow distributor 200 is connected to a pipeline at the lower end of the second regulating valve 230, which is then connected to the temperature regulation pipeline of the battery pack 400 and the water collector 600. The liquid flowing through the four-way flow distributor 200 enters the temperature regulation pipeline of the battery pack 400 through the second regulating valve 230, exchanges heat with the battery pack 400, and then flows to the water collector 600.

[0042] Branch C is: the lower end of the regulating valve three 240 of the four-way flow distributor 200 is connected to the water distributor two 300 through a pipe, and the branch is divided into three branches C1, C2, and C3 along the three output ports of the water distributor two 300. Each branch C1, C2, and C3 is connected to the battery pack 400 and the water distributor three 500 through a pipe in turn, and the water distributor three 500 is connected to the water collector 600 through a pipe. The liquid flowing through the four-way flow distributor 200 passes through the regulating valve three 240, the water distributor two 300, the water distributor three 500 and the water collector 600 in turn. When passing through the water distributor two 300, it is divided into three temperature regulating pipelines passing through the battery pack 400, and flows to the water distributor three 500 after heat exchange with the battery pack 400.

[0043] The water collector 600 contains a liquid inlet and a gas inlet, and the liquid inlet forms two branches through a pipeline. One branch is connected to the input end of the thermal management unit 100 so that the liquid in the system can flow back to the thermal management unit 100 for redistribution, and the other branch is connected to the expansion kettle 700 so that the expansion kettle 700 can replenish the liquid lost in the system; the gas inlet of the water collector 600 is directly connected to the expansion kettle 700 through a pipeline, which is convenient for discharging the gas formed by the liquid in the system flow; the A, B, C1, C2, and C3 branches are simultaneously installed with flow meters in series to measure the liquid flow rate flowing through each branch.

[0044] The diameter of the pipeline of the four-way flow distributor 200 connected to the thermal management unit 100 is 25 mm, the diameter of the pipelines of A, B, C1, C2, and C3 is 16 mm, the diameter of the pipeline between the four-way flow distributor 200 and the water distributor 2 300, the diameter of the pipeline between the water distributor 2 30 and the water distributor 3 500, and the diameter of the pipeline between the water distributor 300 and the thermal management unit 100 is 25 mm, and the diameter of the two pipelines between the water collector 600 and the expansion kettle 700 is 8 mm.

[0045] The diameter of the interface between the upper end of the connector 1 211 and the steel pipe 216 is d1, the diameter of the interface between the upper end of the connector 212 and the steel pipe 216 is d2, and the diameter of the interface between the upper end of the connector 3 213 and the steel pipe 216 is d3; the thermal management unit 100 turns on the self-circulation mode and adjusts the openings of the regulating valve 1 220, the regulating valve 2 230 and the regulating valve 3 240 on the four-way flow distributor 200 so that the flow of the five branches of the battery pack 400 all reaches 10L / min, at this time, record the opening and cross-section of regulating valve 1 220, regulating valve 2 230 and regulating valve 3 240, calculate the diameters d1, d2, d3 through the formula, replace the four-way flow distributor 200 in the system that meets the diameter requirements, and make the flow on each branch the same by slightly adjusting the opening of regulating valve 1 220, regulating valve 2 230 and regulating valve 3 240 on the four-way flow distributor 200. In this way, the temperature in the system can be better regulated.

[0046] In addition, the flow resistance of each branch can be calculated based on the flow resistance of a single battery pack, the pipeline flow resistance and the pipeline length. Since the flow resistance of each branch is different, the pressure drop of each branch is inconsistent. The diameters d1, d2, and d3 of the four-way flow distributor 200 are used to adjust the water supply pressure of each branch to ensure uniform flow distribution in each branch.

[0047] The above-mentioned embodiments only express a certain implementation method of the utility model, and the description thereof is relatively specific and detailed, but it cannot be understood as limiting the scope of the patent of the utility model. It should be pointed out that for ordinary technicians in this field, several variations and improvements can be made without departing from the concept of the utility model, which all fall within the scope of protection of the utility model. Therefore, the scope of protection of the utility model patent shall be based on the attached claims.

Claims

1. A new energy power battery multi-branch flow distribution system, characterized by: The invention comprises a heat management unit (100) and a four-way flow distributor (200) connected to the heat management unit (100) through a pipeline, wherein the four-way flow distributor (200) comprises a water distributor (210) and a regulating valve (220), a regulating valve (230) and a regulating valve (240) respectively connected to a connector (211), a connector (212) and a connector (213) of the water distributor (210), wherein the four-way flow distributor (200) is divided into three branches A, B and C along the regulating valve (220), the regulating valve (230) and the regulating valve (240): Branch A: The lower end of the regulating valve 1 (220) is connected to the temperature regulating pipeline and the water collector (600) of the battery pack (400) in sequence through pipelines; Branch B: The lower end of the second regulating valve (230) is connected to the temperature regulating pipeline and the water collector (600) of the battery pack (400) in sequence through pipelines; Branch C: The regulating valve 3 (240) is connected to the water distributor 2 (300) through a pipeline, and is divided into three branches C1, C2, and C3 along the three output ports of the water distributor 2 (300). Each branch C1, C2, and C3 is connected to the temperature regulating pipeline of the battery pack (400) and different input ports of the water distributor 3 (500) through a pipeline along different output ports of the water distributor 2 (300). The water distributor 3 (500) is connected to the water collector (600) through a pipeline. The water collector (600) comprises a liquid inlet and a gas inlet, wherein the liquid inlet forms two branches through a pipeline, one branch being connected to the input end of the thermal management unit (100) through a pipeline, and the other branch being connected to the expansion kettle (700) through a pipeline, and the gas inlet being directly connected to the expansion kettle (700) through a pipeline; the A, B, C1, C2, and C3 branches are simultaneously provided with flow meters installed in series.

2. A new energy power battery multi-branch flow distribution system according to claim 1, characterized in that: The water distributor 1 (210) includes a steel pipe (216) and a fixed bracket (217) fixedly connected to the steel pipe (216), fixed sealing plates (214) are fixedly connected to both ends of the steel pipe (216), and the steel pipe (216) is also fixedly connected to a joint 1 (211), a joint 2 (212), a joint 3 (213) and a joint 4 (215).

3. A new energy power battery multi-branch flow distribution system according to claim 2, characterized in that: The steel pipe (216) is fixed together with the first joint (211), the second joint (212) and the third joint (213) along the same axial direction.

4. A new energy power battery multi-branch flow distribution system according to claim 3, characterized in that: The steel pipe (216) is connected to the regulating valve 1 (220), the regulating valve 2 (230) and the regulating valve 3 (240) through the lower ends of the joint 1 (211), the joint 2 (212) and the joint 3 (213), respectively.

5. A new energy power battery multi-branch flow distribution system according to claim 4, characterized in that: The regulating valve 1 (220) and regulating valve 2 (230) are Φ16 stainless steel butterfly handle ball valves, and the regulating valve 3 (240) is a Φ25 stainless steel butterfly handle ball valve.

6. A new energy power battery multi-branch flow distribution system according to claim 5, characterized in that: The diameter of the pipeline of the four-way flow distributor (200) connected to the thermal management unit (100) is 25 mm, the diameter of the pipelines of A, B, C1, C2, and C3 is 16 mm, the diameter of the pipeline between the four-way flow distributor (200) and the second water distributor (300), the diameter of the pipeline between the second water distributor (300) and the third water distributor (500), and the diameter of the pipeline between the third water distributor (500) and the thermal management unit (100) is 25 mm, and the diameter of the pipeline between the water collector (600) and the expansion kettle (700) is 8 mm.

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