A liquid-cooled energy storage container with high flow uniformity and adjustment method

Abstract

The present invention discloses a liquid-cooled energy storage container with high flow uniformity and a regulating method, wherein the liquid-cooled energy storage container comprises a container body; a liquid-cooled unit and a plurality of battery clusters respectively fixedly arranged in the container body, wherein the battery cluster comprises a plurality of battery modules; a circulating flow channel assembly connecting the liquid-cooled unit and the plurality of battery clusters, which comprises a primary water inlet pipe, a primary water return pipe, a plurality of secondary water inlet pipes, a plurality of secondary water return pipes, a plurality of tertiary water inlet pipes, a plurality of tertiary water return pipes and a plurality of variable diameter series pipes; a high-precision flow regulator is arranged on one end of each secondary water inlet pipe close to the primary water inlet pipe; a pressure-sensitive fine-tuning device is arranged on one end of each secondary water return pipe close to the primary water return pipe. The present invention effectively solves the problem of uneven coolant flow distribution in the existing liquid-cooled energy storage container through the mutual cooperation of the variable diameter series pipe, the precision flow regulator and the pressure-sensitive fine-tuning device.

Description

Technical Field

[0001] The present invention relates to the field of energy storage technology, and more specifically, to a liquid-cooled energy storage container with high flow uniformity and an adjustment method thereof. Background Art

[0002] The batteries in the liquid-cooled energy storage container operate at high-rate charge and discharge. The heat emitted by the batteries is generally transported through pipes to the liquid cooling unit for cooling via the coolant in the water-cooling plate flow channel. Currently, energy storage containers are generally integrated with 9, 10, 12 or 14 battery clusters, and each battery cluster is stacked with 8 liquid-cooled battery modules. Its cooling system is connected to the liquid cooling unit with a primary pipeline, which diverts the coolant to the secondary pipeline at the cluster level. Finally, the coolant flows into the water-cooling plate through a tertiary pipeline connected to the battery module water-cooling plate, thereby bringing the heat generated by the battery module back to the liquid cooling unit for cooling. In the prior art, the primary pipeline is generally diverted to the secondary pipeline in a natural diversion manner. Due to the influence of the pipeline head resistance, the coolant flow distribution is less for the battery cluster farther away from the liquid cooling unit. On the other hand, the eight liquid-cooled battery modules are stacked from bottom to top. Due to the self-hanging effect of gravity, the coolant flow of each battery module varies greatly, resulting in a large temperature difference between the batteries in the same battery cluster. In severe cases, the battery temperature in individual battery modules with small coolant flow will exceed the battery design index temperature, thereby causing the risk of thermal runaway and endangering the entire liquid-cooled energy storage container. Therefore, a liquid-cooled energy storage container with high flow uniformity and an adjustment method are provided to solve the above problems. Summary of the Invention

[0003] One of the objectives of the present invention is to provide a liquid-cooled energy storage container with high flow uniformity and a regulation method, so as to solve the problem of uneven coolant flow distribution in existing liquid-cooled energy storage containers.

[0004] The present invention provides a liquid-cooled energy storage container with high flow uniformity and an adjustment method thereof, which can be implemented by the following technical solutions:

[0005] The present invention provides a liquid-cooled energy storage container with high flow uniformity; a liquid cooling unit and multiple battery clusters, which are respectively fixedly arranged in the container body, and the battery clusters include multiple battery modules; a circulation channel component, which connects the liquid cooling unit and the multiple battery clusters;

[0006] The circulating flow channel assembly includes a primary water inlet pipe and a primary water return pipe, both of which are connected to the water outlet and the water return port of the liquid cooling unit respectively; a plurality of secondary water inlet pipes connected to the primary water inlet pipe; a plurality of tertiary water inlet pipes connected to the secondary water inlet pipe and the liquid inlet of the battery module respectively; a plurality of reducing series pipes connecting two adjacent battery modules in a horizontal direction in series; a plurality of tertiary water return pipes connected to the liquid outlet of the battery module respectively; a plurality of secondary water return pipes connected to the tertiary water return pipe and connected to the primary water return pipe respectively;

[0007] Among them, a high-precision flow regulator is provided on one end of each secondary water inlet pipe close to the first-level water inlet pipe, which can accurately control the flow rate of coolant flowing to the corresponding battery cluster; the inner diameters of the multiple variable-diameter series pipes are different, and the specific dimensions of the multiple variable-diameter series pipes are set according to the data calculated by the established simulation model, so that the flow rate of coolant entering each battery module remains consistent; each secondary return pipe is provided on one end close to the first-level return pipe. A pressure-sensitive fine-tuner is provided, which can automatically fine-tune the pressure value of the coolant flowing through it and can monitor in real time whether there are bubbles in the coolant.

[0008] In one embodiment, an exhaust valve is provided at the upper end of the secondary water inlet pipe and the upper end of the secondary water return pipe, and the exhaust valve only allows gas to pass through.

[0009] In one embodiment, the high-precision flow regulator includes a flow regulator body, which is fixedly arranged on the secondary water inlet pipe; a flow opening angle dial fixedly arranged on the side of the flow regulator body; a flow adjustment pointer movably arranged on the flow regulator body and capable of pointing to the flow opening angle dial, and rotating the flow adjustment pointer can achieve flow opening adjustment of the flow regulator body; an adjusting part fixedly arranged on the flow adjustment pointer; and a self-locking button arranged on the flow regulator body and capable of fixing and limiting the flow adjustment pointer.

[0010] In one embodiment, the pressure-sensing fine-tuner includes a shell, which is arranged through the secondary return pipe; a pressure-sensing pipe arranged in the shell and connected to the secondary return pipe, which can automatically adjust the pressure value of the coolant flowing through it; and an ultrasonic monitor arranged on the outside of the shell, which emits ultrasonic waves that can penetrate the wall of the pressure-sensing pipe and monitor in real time whether there are bubbles in the pressure-sensing pipe.

[0011] In one embodiment, a slightly constricted arc surface is formed in the middle of the pressure-sensing pipe, and the arc surface is made of a pressure-sensing material with a critical pressure value.

[0012] In one embodiment, when the pressure of the coolant flowing through the pressure-sensing pipe exceeds the critical pressure value, the flow channel of the pressure-sensing pipe expands, causing the coolant pressure to decrease; when the coolant pressure decreases to the critical pressure value of the pressure-sensing pipe, the flow channel of the pressure-sensing pipe returns to the flow area at the initial critical pressure, thereby achieving a constant coolant pressure value in the pressure-sensing pipe.

[0013] In one embodiment, a partition is provided in the container body, and the container body is divided into two independent chambers by the partition; the partition is made of heat-insulating and refractory material.

[0014] In one embodiment, each battery cluster includes 16 battery modules, wherein 8 battery modules are stacked vertically as a group; the water outlets and water inlets of two horizontally adjacent battery modules in two groups of battery modules are connected in series.

[0015] In one embodiment, a flow rate and pressure monitoring device is provided at a position of the first-level water inlet pipe close to the liquid cooling unit.

[0016] The present invention provides a high flow uniformity regulation method, which is applied to any of the above-mentioned liquid-cooled energy storage containers, comprising the following steps:

[0017] S1, constructing a simulation model of a liquid-cooled energy storage container, performing simulation and model correction according to actual operating conditions; outputting the simulated inner diameter of each of the variable-diameter series pipes, and simultaneously obtaining the simulated flow opening value of each of the high-precision flow regulators and converting it into a corresponding adjustment angle value;

[0018] S2, conducting a liquid-cooled energy storage container prototype test, processing a plurality of the reducing tubes in series according to the simulated inner diameters of the reducing tubes in series and assembling them; the liquid cooling unit starts the coolant circulation, and the pressure-sensing fine-tuning device ultrasonically confirms whether there are bubbles in the fluid;

[0019] S3, adjusting and fixing the flow openings of the plurality of high-precision flow regulators according to the adjustment angle values ​​of the respective high-precision flow regulators;

[0020] S4, determining whether the simulation data and the test data are consistent, if they are consistent, the uniformity adjustment is ended; if they are inconsistent, the pressure-sensitive fine-tuning device is automatically fine-tuned to make the simulation data and the test data consistent.

[0021] Compared with the prior art, the highly uniform liquid-cooled energy storage container and adjustment method of the present invention have the following beneficial effects:

[0022] The present invention discloses a highly uniform liquid-cooled energy storage container and regulation method. By setting different sizes of reducing series pipes, the coolant flow rate between each battery module is kept consistent. The flow opening of the precision flow regulator is manually adjusted to ensure consistent coolant flow between each battery cluster. Furthermore, the pressure-sensitive fine-tuning operation is automatically fine-tuned, effectively solving the problem of uneven coolant flow distribution in existing liquid-cooled energy storage containers.

[0023] The present invention provides a highly uniform liquid-cooled energy storage container and adjustment method. The ultrasonic monitor in the pressure-sensitive fine-tuner can monitor in real time whether there are bubbles in the flow channel, and can monitor the leakage in the flow channel in real time based on the number and size of the bubbles. The battery cluster where the leakage point is located can be quickly identified based on the real-time data. When bubbles first appear in the battery cluster, the battery cluster is determined to be leaking. By providing an exhaust valve that only allows gas to pass through, the gas in the coolant can be effectively discharged. At the same time, the dual battery modules are connected in series, which reduces the container's footprint to a certain extent. The liquid-cooled energy storage container is also simple, easy to operate, and has low maintenance costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for use in the embodiments. It should be understood that the following drawings only illustrate certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without paying any creative work.

[0025] Figure 1 This is a schematic top view of the structure of a liquid-cooled energy storage container with high flow uniformity according to the present invention, including a circulation channel assembly;

[0026] Figure 2 yes Figure 1 The figure shows a side structural diagram of a liquid-cooled energy storage container with high flow uniformity according to the present invention;

[0027] Figure 3 yes Figure 1 The schematic diagram of the structure of the circulation channel assembly shown includes a high-precision flow regulator and a pressure-sensitive fine-tuner;

[0028] Figure 4 yes Figure 3 The structural diagram of the high-precision current regulator shown;

[0029] Figure 5 yes Figure 3 The structural diagram of the pressure-sensitive fine-tuner shown;

[0030] Figure 6 It is a flow chart of a high current-uniformity regulation method of the present invention.

[0031] Markings in the figure: 10, liquid-cooled energy storage container; 11, container body; 111, partition; 12, liquid cooling unit; 13, battery cluster; 131, battery module; 14, circulation channel assembly; 141, first-level water inlet pipe; 1411, flow pressure monitoring device; 142, second-level water inlet pipe; 1421, high-precision flow regulator; 14211, flow regulator body; 14212, flow opening angle dial; 14213, flow regulation pointer; 14214, adjusting part; 14215, self-locking button; 143, third-level water inlet pipe; 144, reducing series pipe; 145, third-level return pipe; 146, second-level return pipe; 1461, pressure-sensitive fine-tuner; 14611, shell; 14612, pressure-sensitive pipe; 14613, ultrasonic monitor; 147, first-level return pipe; 15, exhaust valve. DETAILED DESCRIPTION

[0032] To make the objectives, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions of the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings of 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. Generally, the components of the embodiments of the present invention described and illustrated in the drawings herein can be arranged and designed in various different configurations.

[0033] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the invention as claimed, but rather merely represents selected embodiments of the present invention. All other embodiments derived by persons of ordinary skill in the art based on the embodiments of the present invention without creative effort are intended to fall within the scope of protection of the present invention.

[0034] See also Figure 1-Figure 5 As shown, a liquid-cooled energy storage container 10 with high flow uniformity of the present invention includes a container body 11, a liquid cooling unit 12, multiple battery clusters 13 and a circulation flow channel assembly 14; the container body 11 is a hollow cavity; the liquid cooling unit 12 and the multiple battery clusters 13 are respectively fixedly arranged in the container body 11; the circulation flow channel assembly 14 connects the liquid cooling unit 12 and the multiple battery clusters 13, so that the coolant in the liquid cooling unit 12 can circulate in the multiple battery clusters 13, thereby bringing the heat generated by the multiple battery clusters 13 back to the liquid cooling unit 12 for cooling.

[0035] See also Figure 1 and Figure 2As shown, in this embodiment, a partition 111 is provided in the container body 11, which divides the container body 11 into two independent chambers by the partition 111, and the liquid cooling unit 12 and multiple battery clusters 13 are respectively fixedly arranged in the corresponding independent chambers; specifically, the material of the partition 111 is a heat-insulating refractory material, and multiple through holes are provided thereon to facilitate the circulation channel assembly 14 to pass through the partition 111 and be connected with the corresponding liquid cooling unit 12 and battery cluster 13 respectively, and the aperture of the through hole is consistent with the outer diameter of the circulation channel assembly 14.

[0036] See also Figure 1 and Figure 2 As shown, in this embodiment, two liquid cooling units 12 are respectively disposed in corresponding independent chambers. Both are connected to multiple battery clusters 13 via corresponding circulation channel assemblies 14. The liquid cooling units 12 can cool the coolant heated by the battery clusters 13 by refrigeration, and can also provide liquid pressure, so that the cooled coolant can circulate between the liquid cooling units 12 and the battery clusters 13 through the circulation channel assemblies 14, thereby achieving a cooling and heat dissipation effect for the battery clusters 13. Specifically, the liquid cooling units 12 are provided with a water storage tank connected in series with the flow channel system. In other embodiments, the number of liquid cooling units 12 can be one, three, or a plurality of other units, and the number can be set according to actual needs. Specifically, the battery cluster 13 includes multiple battery modules 131, which are stacked vertically. The water outlets of two horizontally adjacent battery modules 131 are connected to the water inlet, forming a series flow of coolant. In this embodiment, the battery cluster 13 includes 16 battery modules 131, which are stacked vertically in groups of 8 battery modules 131. The water outlets and water inlets of two horizontally adjacent battery modules 131 in two groups of battery modules 131 are connected in series. Specifically, the battery module 131 includes a module housing, multiple batteries, a BMS control system, and a water cooling plate. The module housing is a hollow cavity, and the multiple batteries are fixedly arranged in parallel in the module housing. The BMS control system is fixedly arranged in the module housing and electrically connected to the multiple batteries. The water cooling plate is fixedly arranged on the module housing and is in contact with the multiple batteries. It is connected to the circulation channel assembly 14, so that the heat generated by the multiple batteries is transferred to the liquid cooling unit 12 through the circulating coolant for heat dissipation.

[0037] See also Figure 1-Figure 3As shown, in this embodiment, two circulation channel components 14 are respectively connected to the corresponding liquid cooling unit 12 and multiple battery clusters 13; the circulation channel component 14 includes a primary water inlet pipe 141, multiple secondary water inlet pipes 142, multiple tertiary water inlet pipes 143, multiple variable diameter series pipes 144, multiple tertiary water return pipes 145, multiple secondary water return pipes 146 and a primary water return pipe 147; the primary water inlet pipe 141 and the primary water return pipe 147 are respectively connected to the water outlet and the water return port of the liquid cooling unit 12, and the primary water inlet pipe 141 guides the coolant in the liquid cooling unit 12 to the battery cluster 13 for cooling operation, and the first-level return pipe 147 guides the coolant heated by the battery cluster 13 to the liquid cooling unit 12 for cooling operation; one end of the multiple secondary water inlet pipes 142 is connected to the first-level water inlet pipe 141 respectively, and the multiple secondary water inlet pipes 142 guide the coolant in the first-level water inlet pipe 141 to the corresponding battery cluster 13; the two ends of the multiple tertiary water inlet pipes 143 are respectively connected to the corresponding secondary water inlet pipes 142, the battery module The liquid inlet of 131 is connected, and the multiple three-stage water inlet pipes 143 respectively guide the coolant in the secondary water inlet pipe 142 to the water-cooled plate of the corresponding battery module 131, so that the coolant in the liquid cooling unit 12 passes through the primary water inlet pipe 141, the multiple secondary water inlet pipes 142, and the multiple three-stage water inlet pipes 143 in sequence into the multiple battery modules 131 for heat conduction operation; the multiple diameter-reducing series pipes 144 are respectively connected in series with two adjacent battery modules 131 in the horizontal direction, so that the coolant can be heated in the horizontal direction. Flows upward into the two adjacent battery modules 131; one end of the multiple tertiary return pipes 145 is respectively connected to the liquid outlet of the corresponding battery module 131; the multiple secondary return pipes 146 are respectively connected to the corresponding multiple tertiary return pipes 145 and are respectively connected to the primary return pipe 147, so that the heated coolant in the battery module 131 is returned to the liquid cooling unit 12 through the tertiary return pipe 145, the secondary return pipe 146, and the primary return pipe 147 in sequence for refrigeration and cooling cycle.

[0038] See also Figure 2 and Figure 3 As shown, specifically, a flow and pressure monitoring device 1411 is provided at a position of the first-level water inlet pipe 141 near the liquid cooling unit 12. The flow and pressure monitoring device 1411 monitors the flow and pressure of the coolant flowing out of the liquid cooling unit 12 in real time, and simultaneously uploads the data in real time to the control module of the liquid-cooled energy storage container 10 for storage and analysis.

[0039] See also Figure 2-Figure 4As shown, in this embodiment, a high-precision flow regulator 1421 is provided on one end of the secondary water inlet pipe 142 close to the primary water inlet pipe 141, which can accurately control the flow rate of the coolant flowing to the corresponding battery cluster 13, thereby achieving flow equalization regulation among multiple battery clusters 13. Specifically, the high-precision flow regulator 1421 includes a flow regulator body 14211, a flow opening angle dial 14212, a flow adjustment pointer 14213, an adjustment member 14214, and a self-locking button 14215; the flow regulator body 14211 is fixedly arranged on the secondary water inlet pipe 142, and can accurately adjust the flow rate of the coolant flowing from the primary water inlet pipe 141 to the battery cluster 13 through the secondary water inlet pipe 142; the flow opening angle dial 14212 is fixedly arranged on the side of the flow regulator body 14211, and can indicate the flow rate of the flow regulator body 14211; the flow adjustment pointer 14213 is movably arranged on the flow regulator body 14211 and can Pointing to the flow opening angle dial 14212, the flow opening of the flow regulator main body 14211 can be adjusted by rotating the flow adjustment pointer 14213; the adjusting member 14214 is fixedly arranged on the flow adjustment pointer 14213, which can drive the flow adjustment pointer 14213 to rotate, facilitating the rotation of the flow adjustment pointer 14213, thereby realizing precise adjustment of the flow size of the flow regulator main body 14211; the self-locking button 14215 is arranged on the flow regulator main body 14211 and can fix the flow adjustment pointer 14213, thereby fixing the flow opening of the flow regulator main body 14211, so that the opening will not change due to factors such as transportation vibration, collision, thermal expansion and contraction. In this embodiment, when the flow adjustment pointer 14213 points to the 0° position on the flow opening angle dial 14212, the flow opening of the corresponding flow regulator body 14211 is 0%; when the flow adjustment pointer 14213 rotates to point to the 90° position on the flow opening angle dial 14212, the flow opening of the corresponding flow regulator body 14211 is 100%; from 0° to 90°, the corresponding flow opening changes by 1.11% for every 1°, thereby facilitating precise adjustment of the flow size of the flow regulator body 14211.

[0040] See also Figure 2 and Figure 3As shown, specifically, the two ends of the variable diameter series tube 144 are respectively connected to the water outlet and the water inlet of two battery modules 131 adjacent in the horizontal direction; the inner diameters of the multiple variable diameter series tubes 144 in the same vertical direction are different. By reducing the inner diameter of the variable diameter series tube 144, the coolant in the first battery module 131 can be accelerated to enter the second battery module 131. In this embodiment, in a group of battery modules 131 stacked in the same vertical direction, the inner diameter of the reducing series tube 144 arranged between the two horizontally connected battery modules 131 at the bottom is reduced to D1, and the inner diameters of the reducing series tubes 144 upwards are D2, D3, D4, D5, D6, D7, and D8 respectively; the inner diameter size D of each reducing series tube 144 is simulated and adjusted according to the constructed simulation model, and the inner diameter size D of each reducing series tube 144 is continuously adjusted in the simulation model until the flow between the two horizontally connected battery modules 131 stacked from bottom to top is consistent, and then the simulated inner diameter sizes D1, D2, D3, D4, D5, D6, D7, and D8 of the reducing series tube 144 are locked, thereby determining the corresponding inner diameter size D of each reducing series tube 144.

[0041] See also Figure 2 As shown, specifically, an exhaust valve 15 is provided at the upper end of the secondary water inlet pipe 142 and the secondary water return pipe 146, which has the characteristic of only allowing pressurized gas to pass through and not allowing liquid to pass through. When there are air bubbles in the coolant, the bubbles can be discharged through the exhaust valve 15 on the corresponding secondary water inlet pipe 142 or the secondary water return pipe 146 until there is no gas in the coolant.

[0042] See also Figure 2 、 Figure 3 and Figure 5As shown, in this embodiment, a pressure-sensitive fine-tuner 1461 is provided on one end of the secondary return pipe 146 close to the primary return pipe 147, which includes a shell 14611, a pressure-sensitive pipe 14612 and an ultrasonic monitor 14613; the shell 14611 is arranged on the secondary return pipe 146; the pressure-sensitive pipe 14612 is arranged in the shell 14611 and is connected to the secondary return pipe 146, and a micro-contracted arc surface is formed in the middle. The arc surface is made of pressure-sensitive material, and the pressure-sensitive material has a pressure critical value. When the pressure of the coolant flowing through exceeds the pressure critical value, the flow channel of the pressure-sensitive pipe 14612 will expand, thereby increasing the coolant flow rate and reducing the cooling liquid pressure; when the coolant pressure decreases and returns to the critical pressure value, the arc flow channel of the pressure-sensitive pipe 14612 returns to the flow area at the initial critical pressure; when the pressure drop values ​​of multiple battery clusters 13 are the same, the pressure drop value is The pressure-sensing fine-tuner 1461 has a critical value of the pressure-sensing material; an ultrasonic monitor 14613 is provided on the outside of the shell 14611, and the ultrasonic wave it emits can well penetrate the wall of the pressure-sensing pipe 14612 to monitor in real time whether there are bubbles in the pressure-sensing pipe 14612; when bubbles pass through the pressure-sensing pipe 14612, the ultrasonic monitor 14613 will send a bubble signal and upload it to the control module until the bubbles in the coolant are discharged through the exhaust valve 15, ensuring the accuracy of flow and pressure detection; the ultrasonic monitor 14613 can also monitor the leakage of the circulating flow channel component 14 in real time, and it can quickly lock the battery cluster 13 where the leakage point is located according to real-time data at the first time. When bubbles appear in the battery cluster 13 for the first time, it is determined that the battery cluster 13 is leaking. The ultrasonic monitor 14613 can also monitor and calculate the size of the bubbles, and upload the bubble size in real time to the system data center for storage. When coolant leaks during operation, the data monitored by the ultrasonic monitor 14613 on the battery cluster 13 shows that there are bubbles and the size of the bubbles can be monitored. The severity of the leak is determined based on the size of the bubbles, and the liquid cooling unit 12 is automatically replenished with liquid, or the operation needs to be stopped to inspect and repair the leak point.

[0043] See also Figure 1 、 Figure 2 and Figure 6 As shown, the present invention provides a high flow uniformity regulation method, which is applied to any of the above-mentioned liquid-cooled energy storage containers 10, and the specific steps include the following:

[0044] System defined value: total flow value is Q;

[0045] The water flow rate of the battery cluster 13a is Q1, the water inlet pressure of the battery cluster 13a is P1, the water return pressure of the battery cluster 13a is P2, and the pressure drop of the battery cluster 13a is ∆P1=P1-P2;

[0046] The water flow rate of the battery cluster 13b is Q2, the water inlet pressure of the battery cluster 13b is P3, the return water pressure of the battery cluster 13b is P4, and the pressure drop of the battery cluster 13b is ∆P2=P3-P4;

[0047] The water flow rate of the battery cluster 13c is Q3, the water pressure of the battery cluster 13c is P5, the return pressure of the battery cluster 13c is P6, and the pressure drop of the battery cluster 13c is ∆P3=P5-P6;

[0048] The water inlet flow rate of each battery module 131 is Q4=Q / 24 or Q4=Q1 / 8 or Q4=Q2 / 8 or Q4=Q3 / 8, and the simulated pressure drop value of the battery module 131 is ∆P0;

[0049] The temperature difference of the system battery is ∆T;

[0050] The simulated inner diameter of the reducing series pipe 144 is D;

[0051] The simulated flow opening of the high-precision flow regulator 1421 is K, and the angle scale of the high-precision flow regulator 1421 is W.

[0052] S1. Build a simulation model for a liquid-cooled energy storage container and perform simulation and model correction according to actual operating conditions. When the simulation output result ∆T is less than 3°C, and ∆P1=∆P2=∆P3, Q1=Q2=Q3, Q4=Q1 / 8 or Q4=Q2 / 8 or Q4=Q3 / 8, and the pressure drop values ​​of all battery modules 131 are equal to ∆P0, determine the simulated inner diameter D of all reducing series pipes 144. Simultaneously, obtain the simulated flow opening K value of each high-precision flow regulator 1421 and convert it into the corresponding adjustment angle W value.

[0053] When ∆T ≥ 3°C, or ∆P1 ≠ ∆P2 ≠ ∆P3, or Q1 ≠ Q2 ≠ Q3, or Q4 ≠ Q1 / 8, or Q4 ≠ Q2 / 8, or Q4 ≠ Q3 / 8, or the pressure drop value of any battery module 131 is not equal to ∆P0, it is necessary to re-modify the simulated inner diameter of each reducing series pipe 144 and the simulated flow opening K value of each high-precision flow regulator 1421 in the simulation model until all the above parameters meet the requirements at the same time. The model simulation ends.

[0054] S2: Conduct a prototype test of the liquid-cooled energy storage container 10. The corresponding reducing series pipes 144 are machined and assembled according to their simulated inner diameter D. The liquid cooling unit 12 starts circulating the coolant, and the pressure-sensing trimmer 1461 ultrasonically confirms the presence of bubbles in the fluid. Specifically, multiple ultrasonic monitors 14613 monitor the bubble status in the fluid of the corresponding battery cluster 13 in real time until the bubbles in the fluid of each battery cluster 13 are discharged through the exhaust valve 15.

[0055] S3, according to the adjustment angle W value of each high-precision flow regulator 1421, the flow opening is adjusted through the corresponding flow adjustment pointer 14213, and the flow opening of the corresponding high-precision flow regulator 1421 is fixed by the self-locking button 14215;

[0056] S4: Determine whether the simulation data and the test data are consistent. If they are consistent, uniformity adjustment is terminated. If they are inconsistent, the pressure-sensing fine-tuning device 1461 is automatically fine-tuned to ensure consistency between the simulation data and the test data. Specifically, when the system battery temperature difference ∆T obtained during the prototype test is less than 3°C, and the system calculates ∆P1=∆P2=∆P3, and Q1=Q2=Q3, the simulation data and the test data are determined to be consistent, and uniformity adjustment is terminated. When the system battery temperature difference ∆T obtained during the prototype test is greater than or equal to 3°C, or when the system calculates ∆P1≠∆P2≠∆P3, and Q1≠Q2≠Q3, the pressure-sensing fine-tuning device 1461 in each battery cluster 13 senses a pressure value that exceeds its critical value and automatically adjusts the pressure value to the critical value, that is, when ∆P1=∆P2=∆P3, and Q1=Q2=Q3, the simulation data and the test data are determined to be consistent, and uniformity adjustment is terminated.

[0057] The technical features of the above-mentioned embodiments can be combined arbitrarily. In order to make the description concise, not all possible combinations of the technical features in the above-mentioned embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0058] The above-described embodiments merely illustrate several implementations of the present invention, and while their descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent. It should be noted that a person skilled in the art would be able to make numerous variations and improvements without departing from the spirit of the present invention, all of which fall within the scope of protection of the present invention. Therefore, the scope of protection of the patent for this invention shall be determined by the appended claims.

Claims

1. A liquid-cooled energy storage container with high flow uniformity, characterized in that: include: Container body; A liquid cooling unit and a plurality of battery clusters, which are respectively fixedly arranged in the container body, and the battery cluster includes a plurality of battery modules; A circulation channel component, which connects the liquid cooling unit and the plurality of battery clusters; The circulation channel assembly includes a primary water inlet pipe and a primary water return pipe, both of which are connected to the water outlet and the water return port of the liquid cooling unit respectively; a plurality of secondary water inlet pipes connected to the primary water inlet pipe respectively; a plurality of tertiary water inlet pipes connected to the secondary water inlet pipe and the liquid inlet of the battery module respectively; a plurality of variable diameter series pipes connecting two adjacent battery modules in a horizontal direction in series respectively; a plurality of tertiary water return pipes connected to the liquid outlet of the battery module respectively; a plurality of secondary water return pipes connected to the tertiary water return pipes and connected to the primary water return pipe respectively; Among them, a high-precision flow regulator is provided on one end of each of the secondary water inlet pipes close to the primary water inlet pipe, which can accurately control the flow rate of the coolant flowing to the corresponding battery cluster; the inner diameters of the multiple variable-diameter series tubes are different, and the specific sizes of the multiple variable-diameter series tubes are set according to the data calculated by the established simulation model, so that the coolant flow rate entering each of the battery modules remains consistent; a pressure-sensitive fine-tuner is provided on one end of each of the secondary return pipes close to the primary return pipe, which can automatically fine-tune the pressure value of the coolant flowing therethrough and can monitor in real time whether there are bubbles in the coolant.

2. A liquid-cooled energy storage container with high flow uniformity according to claim 1, characterized in that: The upper ends of the secondary water inlet pipe and the secondary water return pipe are both provided with exhaust valves, and the exhaust valves only allow gas to pass through.

3. A liquid-cooled energy storage container with high flow uniformity according to claim 2, characterized in that: The high-precision flow regulator comprises a flow regulator body, which is fixedly arranged on the secondary water inlet pipe; a flow opening angle dial fixedly arranged on the side of the flow regulator body; a flow adjustment pointer movably arranged on the flow regulator body and capable of pointing to the flow opening angle dial, and the flow opening of the flow regulator body can be adjusted by rotating the flow adjustment pointer; and an adjusting member fixedly arranged on the flow adjustment pointer; A self-locking button is arranged on the flow regulator body and can fix and limit the flow regulating pointer.

4. A liquid-cooled energy storage container with high flow uniformity according to claim 2, characterized in that: The pressure-sensing fine-tuner includes a shell, which is arranged through the secondary return pipe; a pressure-sensing pipeline arranged in the shell and connected to the secondary return pipe, which can automatically adjust the pressure value of the coolant flowing through it; an ultrasonic monitor arranged on the outside of the shell, the ultrasonic wave emitted by it can penetrate the pipe wall of the pressure-sensing pipeline and monitor in real time whether there are bubbles in the pressure-sensing pipeline.

5. A liquid-cooled energy storage container with high flow uniformity according to claim 4, characterized in that: A micro-shrinkage arc surface is formed in the middle of the pressure sensing pipe, and the arc surface is made of a pressure sensing material with a critical pressure value.

6. A liquid-cooled energy storage container with high flow uniformity according to claim 5, characterized in that: When the pressure of the coolant flowing through the pressure sensing pipeline exceeds the critical pressure value, the flow channel of the pressure sensing pipeline expands, so that the coolant pressure decreases; when the coolant pressure decreases to the critical pressure value of the pressure sensing pipeline, the flow channel of the pressure sensing pipeline returns to the flow area at the initial critical pressure, thereby achieving a constant coolant pressure value in the pressure sensing pipeline.

7. A liquid-cooled energy storage container with high flow uniformity according to claim 2, characterized in that: The container body is provided with a partition, through which the container body is divided into two independent chambers; the partition is made of heat-insulating refractory material.

8. A liquid-cooled energy storage container with high flow uniformity according to claim 2, characterized in that: Each of the battery clusters includes 16 battery modules, wherein 8 battery modules are stacked in a vertical direction as a group; the water outlets and water inlets of two battery modules adjacent to each other in the horizontal direction in two groups of battery modules are connected in series.

9. A liquid-cooled energy storage container with high flow uniformity according to claim 2, characterized in that: A flow rate and pressure monitoring device is provided at a position of the first-level water inlet pipe close to the liquid cooling unit.

10. A high flow uniformity regulation method, applied to the liquid-cooled energy storage container according to any one of claims 1 to 9, characterized in that: The steps include: S1, constructing a simulation model of a liquid-cooled energy storage container, performing simulation and model correction according to actual operating conditions; outputting the simulated inner diameter size of each of the variable-diameter series pipes, and obtaining the simulated flow opening value of each of the high-precision flow regulators and converting it into a corresponding adjustment angle value; S2, testing a prototype of a liquid-cooled energy storage container, processing a plurality of the variable diameter series pipes according to the simulated inner diameter size of each of the variable diameter series pipes and assembling them; the liquid cooling unit starts the coolant circulation, and the pressure-sensing fine tuner ultrasonically confirms whether there are bubbles in the fluid; S3, adjusting and fixing the flow openings of the plurality of high-precision flow regulators respectively according to the adjustment angle value of each of the high-precision flow regulators; S4, determining whether the simulation data and the test data are consistent, if they are consistent, the uniformity adjustment is ended; if they are inconsistent, the pressure sensing fine tuner is automatically fine-tuned to make the simulation data and the test data consistent.

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