Thermal management system and method for energy storage and stacking all-in-one machine

Abstract

The invention relates to the field of thermal management methods of energy storage batteries, in particular to a thermal management system and method for an energy storage and stacking all-in-one machine, and the method comprises the steps: detecting the size of a heat dissipation space at a heat dissipation side, and judging whether the heat dissipation space is sufficient or not according to the size of the heat dissipation space and a pre-stored stacking mode; when the heat dissipation space is not enough, judging the limited number of insufficient heat dissipation spaces of the all-in-one machine, when the local limited number is larger than the lower limit value and smaller than the upper limit value, rotating the side where the heat dissipation space is not enough to the side where the heat dissipation space is enough at intervals, and when the local limited number is equal to the upper limit value, rotating the side where the heat dissipation space is not enough to the side where the heat dissipation space is enough. Moving the heat dissipation side of the all-in-one machine for staggered heat dissipation at a fixed time length, and when the local limit number is equal to the lower limit value, rotating the heat dissipation side of the all-in-one machine to the side with enough heat dissipation space; after the all-in-one machine is rotated, whether the heat dissipation space is enough or not is judged in real time, and if yes, the all-in-one machine is rotated back to the initial direction. The heat dissipation efficiency of the all-in-one machine under the condition that the heat dissipation space is suddenly reduced in the using process can be improved.

Description

Technical Field

[0001] This invention relates to the field of thermal management methods for energy storage batteries, and more specifically to a thermal management system and method for an integrated energy storage stack. Background Technology

[0002] As energy storage technology plays an increasingly important role in the energy transition, integrated energy storage stacks, as key equipment for efficient energy storage and release, have seen their thermal management become a critical factor affecting system performance and safety. Thermal management not only concerns energy conversion efficiency but also directly impacts equipment lifespan and operational stability.

[0003] Energy storage stacking systems include high-voltage and low-voltage stacking systems. High-voltage stacking systems, while operating at lower currents, require DC-DC converters, potentially introducing additional heat sources, and are typically liquid-cooled. Low-voltage stacking systems, due to their higher currents and susceptibility to localized hotspots caused by uneven current distribution, are typically air-cooled. Although stacking systems are equipped with appropriate heat dissipation measures, they generally suffer from low heat dissipation efficiency and uneven temperature distribution. Therefore, thermal management of stacking systems is crucial.

[0004] Currently, thermal management of stacked kilowatts typically involves using flow equalization piping to ensure uniform heat exchange medium flow rates for each battery pack, avoiding localized temperature differences; or using direct heat exchange with refrigerant to reduce intermediate media and improve efficiency. However, existing thermal management methods have limited heat dissipation effectiveness when localized hot spots appear in the batteries, failing to meet requirements. Furthermore, during actual use after installation, sudden reductions in installation space can significantly reduce heat dissipation efficiency and effectiveness, impacting the safety of stacked kilowatts. Summary of the Invention

[0005] The present invention aims to provide a thermal management system and method for an integrated energy storage stack, in order to solve the problem of reduced heat dissipation efficiency and effect when the installation space is suddenly reduced during the use of the integrated machine.

[0006] According to one aspect of the present invention, a thermal management method for an integrated energy storage stack is provided, comprising the following steps: Step 1: During the normal operation of the all-in-one machine after installation, the heat dissipation space size on the heat dissipation side is measured, and the heat dissipation space is determined to be sufficient based on the heat dissipation space size and the pre-stored stacking method. Step 2: When the heat dissipation space is insufficient, determine the number of insufficient heat dissipation space of the all-in-one machine. When the number of insufficient heat dissipation space is greater than the lower limit and less than the upper limit, rotate the side with insufficient heat dissipation space to the side with sufficient heat dissipation space intermittently. When the number of insufficient heat dissipation space is equal to the upper limit, move the heat dissipation side of the all-in-one machine to the side with sufficient heat dissipation space at regular intervals. When the number of insufficient heat dissipation space is equal to the lower limit, rotate the heat dissipation side of the all-in-one machine to the side with sufficient heat dissipation space. Step 3: After rotating the all-in-one machine, check in real time whether the heat dissipation space is sufficient. When the heat dissipation space is sufficient, rotate the all-in-one machine back to the initial position.

[0007] The beneficial effects of this plan are: During the operation of the all-in-one machine, the size of the heat dissipation space is detected, and the sufficiency of the heat dissipation space is judged according to the stacking method. Corresponding rotation and adjustment of the heat dissipation side are then performed. This ensures sufficient heat dissipation results when the heat dissipation side of the all-in-one machine is suddenly blocked and the heat dissipation space is reduced, thereby improving heat dissipation efficiency and effect.

[0008] Furthermore, in step 1, when it is determined that the heat dissipation space is insufficient, the heat dissipation space is checked again at equal intervals. If it is sufficient, step 2 is not performed; if it is insufficient, step 2 is performed.

[0009] The beneficial effect is that by reconfirming whether the heat dissipation space is sufficient, the problem of reduced heat dissipation space caused by some piled objects or human activities can be eliminated, and temporary interference factors in the surrounding environment can be avoided during the test.

[0010] Furthermore, in step 2, before rotating the all-in-one machine to a side with sufficient heat dissipation space at intervals, it is detected in real time whether there are local hot spots. When there are local hot spots, the interval between rotating the side where the local hot spot is located or the side near the local hot spot to the side with sufficient heat dissipation space is lengthened.

[0011] The beneficial effect is that by increasing the heat dissipation time in the heat dissipation space for localized hot spots, heat dissipation efficiency can be improved.

[0012] Furthermore, in step 2, the distance between the side near the local hotspot and the local hotspot is calculated, and the interval between the side near the local hotspot is set according to the distance value. For every 2cm increase in the distance value, the interval is increased by 0.5min.

[0013] The beneficial effect is that by setting the heat dissipation interval based on the actual distance between the local hot spot and the side closest to the local hot spot, the efficiency of heat dissipation of the local hot spot can be guaranteed.

[0014] Furthermore, in step 2, when there are local hot spots, the heat dissipation speed is controlled according to the spacing value.

[0015] The beneficial effect is that it dynamically controls the heat dissipation rate based on the spacing value, thereby improving heat dissipation efficiency.

[0016] Furthermore, in step 2, when moving the heat dissipation side of the all-in-one machine to a different location for heat dissipation, the all-in-one machine is tilted to a set angle for heat dissipation. When performing the next moving and offsetting heat dissipation operation, the all-in-one machine is tilted to dissipate heat in a location where heat dissipation has not been performed.

[0017] The beneficial effect is that by tilting the all-in-one machine to dissipate heat into a larger space, the heat dissipation efficiency is improved.

[0018] Furthermore, in step 2, the timing length and the set angle are determined based on the size of the heat dissipation space. As the size of the heat dissipation space increases, the timing length and the set angle are reduced.

[0019] The beneficial effect is that by determining the timing length and setting angle based on the size of the heat dissipation space, effective heat dissipation can be achieved according to the actual heat dissipation space.

[0020] Furthermore, in step 2, when the all-in-one machine is tilted, it is determined whether the heat dissipation side facing upward is completely unable to dissipate heat into the heat dissipation space. If so, heat dissipation is carried out at a dynamically changing set angle, and the set angle is adjusted with a dynamic change amount of 2°.

[0021] The beneficial effect is that, in situations where the heat dissipation space is very limited, the dynamic tilting of the all-in-one unit can avoid the high temperatures caused by heat dissipation from only one location, thus improving heat dissipation efficiency.

[0022] According to another aspect of the present invention, a thermal management system for an energy storage stack is provided, comprising an integrated unit body, wherein the integrated unit body is provided with a battery manager for receiving temperature values ​​detected by various sensors; It also includes a power mechanism and a power controller installed at the bottom end of the integrated machine body. The power mechanism includes a base supporting the integrated machine body and a power motor that drives the base to rotate. A base plate is provided at the bottom end of the base, and multiple hydraulic jacks are fixed on the base plate. The power controller controls the power motor or hydraulic jacks to start according to the above method. Attached Figure Description

[0023] Figure 1 This is a schematic block diagram of an embodiment of the thermal management method for an integrated energy storage stack. Detailed Implementation

[0024] The following detailed description provides further details on specific implementation methods.

[0025] Example 1 Thermal management methods for energy storage stacked systems, such as Figure 1As shown, it includes the following steps: Step 1: During normal operation after installation, the heat dissipation space size is checked on the heat dissipation side. Based on the heat dissipation space size and the pre-stored stacking method, it is determined whether the heat dissipation space is sufficient. The heat dissipation space size is measured by a distance sensor on the all-in-one machine. When the heat dissipation space size is less than a set value, it is considered insufficient. The set value is determined according to the actual stacking method of the all-in-one machines. For example, for a high-voltage stacked all-in-one machine, a heat dissipation space size less than or equal to 0.8m is considered insufficient. When insufficient heat dissipation space is detected, it is checked again at regular intervals, such as every 5 minutes. If sufficient, proceed to Step 2; otherwise, proceed to Step 2.

[0026] Step 2: When the heat dissipation space is insufficient, determine the number of insufficient heat dissipation space in the all-in-one machine. The number of insufficient heat dissipation space is determined from multiple heat dissipation directions of the all-in-one machine. For example, if the all-in-one machine has heat dissipation in four directions, there may be obstacles in three of them that cause insufficient heat dissipation space.

[0027] When the number of heat dissipation points is greater than the lower limit but less than the upper limit, the side with insufficient heat dissipation space will be rotated intermittently to the side with sufficient heat dissipation space. The lower limit is 1, and the upper limit is the number of heat dissipation points of the all-in-one machine. The rotation interval can be set according to actual needs, for example, the interval duration is 5 minutes.

[0028] When the limit quantity equals the upper limit, the heat dissipation side of the all-in-one machine is moved and staggered for a period of time to dissipate heat. The movement and staggering can be a translational movement in the front-back or left-right directions. When the limit quantity equals the lower limit, the heat dissipation side of the all-in-one machine is rotated to the side with sufficient heat dissipation space.

[0029] Step 3: After rotating the all-in-one machine, check in real time whether the heat dissipation space is sufficient. When the heat dissipation space is sufficient, rotate the all-in-one machine back to the initial position.

[0030] Compared to existing methods that rely on wind speed control and flow equalization piping, this embodiment detects the size of the heat dissipation space around the integrated machine in real time during its operation. This allows for the identification of issues where the heat dissipation space is reduced due to temporary or permanent placement of other objects. Based on the detected heat dissipation space size and the stacking method of the energy storage stacking integrated machine, the system assesses whether the heat dissipation space is sufficient, adapting to different environments. Furthermore, depending on the limited number of insufficient heat dissipation spaces, the system adjusts the heat dissipation side accordingly. This allows for adjustments to the heat dissipation space when it is suddenly blocked, thus improving heat dissipation efficiency and effectiveness.

[0031] The method in this embodiment can detect the external factors that may affect the thermal management during the actual operation of the energy storage stacker when the corresponding thermal management measures have been preset, and perform corresponding thermal management operations. This greatly ensures the operational safety of the energy storage stacker and prevents thermal management abnormalities and failures caused by changes in the external environment.

[0032] Example 2 The thermal management method for an integrated energy storage stack differs from Embodiment 1 in that, in step 2, before intermittently rotating to a side with sufficient heat dissipation space, it detects in real time whether the integrated unit has local hot spots. Local hot spot detection is performed using distributed sensors, such as high-precision temperature sensors installed in key areas (e.g., battery cells, module seams, heat dissipation channels) to monitor temperature changes in real time. MEMS sensors can achieve grid-like monitoring with a 0.5-meter spacing, accurately locating hot spots. When the local temperature exceeds a certain threshold or a fault warning is triggered, a local hot spot is identified. When a local hot spot is present, the interval between rotating the side containing or near the local hot spot to a side with sufficient heat dissipation space is increased. Specifically, the distance between the side near the local hot spot and the local hot spot is calculated. For example, the distance between the location of the local hot spot and the side near the local hot spot is the distance value. The interval for rotating to the side near the local hot spot is set according to this distance value. For every 2cm increase in the distance value, the interval increases by 0.5 minutes. For example, if the distance value is 10cm, the interval increases by 5 minutes.

[0033] When there are local hot spots, the heat dissipation speed is controlled according to the spacing value. The heat dissipation speed is reduced by 10% for every 2cm increase in spacing value.

[0034] In this embodiment, when multiple heat dissipation sides of the energy storage stacked unit are blocked and one heat dissipation side remains unblocked, it detects whether there is a local hot spot. If so, it lengthens the rotation interval and reduces the heat dissipation operation speed. This can increase the heat dissipation time of the local hot spot and improve the heat dissipation effect without causing thermal runaway.

[0035] Example 3 The thermal management method for an integrated energy storage stack differs from Embodiment 1 in that, in step 2, when moving the heat dissipation side of the integrated unit to stagger its heat dissipation, heat dissipation is performed by tilting the integrated unit to a set angle. The set angle is determined based on the actual situation where it does not affect the normal operation of the integrated unit, for example, a tilt of 10°. After a certain time interval, the unit is reset to its initial position before proceeding to the next movement and staggering operation. When performing the next movement and staggering heat dissipation operation, the integrated unit is tilted to dissipate heat in the direction where heat dissipation is not being performed. The time interval and the set angle are determined based on the size of the heat dissipation space. As the size of the heat dissipation space increases, the time interval and the set angle are decreased.

[0036] In this embodiment, when the heat dissipation of the all-in-one machine is blocked around it, the all-in-one machine is tilted to a set angle by moving and staggering it to dissipate heat. At the same time, the timing length and the set angle are determined according to the size of the heat dissipation space. As the size of the heat dissipation space increases, the timing length and the set angle decrease to ensure efficient heat dissipation when there are obstacles around the all-in-one machine.

[0037] Example 4 The thermal management method for the energy storage stacked integrated machine differs from Embodiment 3 in that, in step 2, after tilting the integrated machine, it is determined whether the heat dissipation side facing upward is completely unable to dissipate heat into the heat dissipation space. During the determination, the size of the tilted heat dissipation space is detected by the distance sensor on the tilted integrated machine. If the detected size of the tilted heat dissipation space is not much larger than the size of the heat dissipation space detected in step 1, then heat cannot be dissipated into the heat dissipation space at all. If it is much larger than three times or more of the distance value that can be detected when the integrated machine is tilted at its maximum angle, then heat dissipation is carried out at a dynamically changing set angle, and the set angle is adjusted with a dynamic change amount of 2°.

[0038] After tilting the all-in-one machine, the judgment of whether the heat dissipation side facing upwards can completely dissipate heat into the space is to determine whether the obstructing object or target is too high. If so, the setting scale is dynamically changed. This can avoid the situation where the heat dissipation is concentrated in one position when the sides of the all-in-one machine are completely blocked, which would cause high temperature and slow heat dissipation. The dynamic setting angle can make the obstructing target receive heat evenly when receiving heat, and then dissipate heat quickly, thereby improving the heat dissipation speed.

[0039] Example 5 The thermal management system for the energy storage stack is based on the thermal management method of Embodiment 1, Embodiment 2, Embodiment 3, or Embodiment 4. It includes the integrated machine body and a battery manager on the integrated machine body that receives temperature values ​​detected by various sensors. The battery manager adopts an existing BMS management system, which will not be described in detail here.

[0040] It also includes a power mechanism and a power controller mounted on the bottom end of the integrated machine body. Distance sensors for measuring the dimensions of the heat dissipation space are installed on the surrounding side walls of the integrated machine body. These distance sensors can be existing ultrasonic or infrared distance measuring devices. The power mechanism includes a base supporting the integrated machine body and a motor that drives the base to rotate. The motor is fixed to a shaft on the integrated machine body via a coupling. The motor is a product capable of supporting the integrated machine. The base is smaller than the integrated machine body, and the base is not fixed to the integrated machine body. A base plate is welded to the bottom of the base, and multiple hydraulic jacks capable of lifting the base from one side of the integrated machine are fixedly mounted on the base plate. The specific structural diagrams of each component can be set according to actual needs and existing technology, and will not be elaborated here. The power controller controls the motor or hydraulic jacks to start according to the method of Embodiment 1, Embodiment 2, Embodiment 3, or Embodiment 4.

[0041] The system in this embodiment can monitor in real time whether there are any obstructing targets or objects blocking the heat dissipation space during the use of the all-in-one machine after installation, and provides hardware support for different heat dissipation management under the condition of obstruction and different degrees of obstruction, thereby improving the heat dissipation speed, heat dissipation efficiency and heat dissipation effectiveness of the all-in-one machine.

[0042] The above descriptions are merely embodiments of the present invention, and common knowledge regarding specific structures and characteristics is not elaborated upon here. It should be noted that those skilled in the art can make various modifications and improvements without departing from the structure of the present invention, and these should also be considered within the scope of protection of the present invention. These modifications and improvements will not affect the effectiveness of the present invention or the practicality of the patent. The scope of protection claimed in this application should be determined by the content of its claims, and the specific embodiments described in the specification can be used to interpret the content of the claims.

Claims

1. A thermal management method for an integrated energy storage stack, characterized in that, Includes the following steps: Step 1: During normal operation after the all-in-one machine is installed, the heat dissipation space size on the heat dissipation side is measured, and the heat dissipation space is determined to be sufficient based on the heat dissipation space size and the pre-stored stacking method. Step 2: When the heat dissipation space is insufficient, determine the number of insufficient heat dissipation space of the all-in-one machine. When the number of insufficient heat dissipation space is greater than the lower limit and less than the upper limit, rotate the side with insufficient heat dissipation space to the side with sufficient heat dissipation space intermittently. When the number of insufficient heat dissipation space is equal to the upper limit, move the heat dissipation side of the all-in-one machine to the side with sufficient heat dissipation space at regular intervals. When the number of insufficient heat dissipation space is equal to the lower limit, rotate the heat dissipation side of the all-in-one machine to the side with sufficient heat dissipation space. Step 3: After rotating the all-in-one machine, check in real time whether the heat dissipation space is sufficient. When the heat dissipation space is sufficient, rotate the all-in-one machine back to the initial position.

2. The thermal management method for an integrated energy storage stack as described in claim 1, characterized in that: In step 1, if it is determined that the heat dissipation space is insufficient, the heat dissipation space is checked again at equal intervals. If it is sufficient, the process does not proceed to step 2; otherwise, the process proceeds to step 2.

3. The thermal management method for an integrated energy storage stack as described in claim 1, characterized in that: In step 2, before rotating the all-in-one machine to a side with sufficient heat dissipation space at intervals, it is detected in real time whether there are local hot spots. When there are local hot spots, the interval between rotating the side where the local hot spot is located or the side near the local hot spot to the side with sufficient heat dissipation space is lengthened.

4. The thermal management method for an integrated energy storage stack as described in claim 3, characterized in that: In step 2, the distance between the side closer to the local hotspot and the local hotspot is calculated, and the interval for rotating to the side closer to the local hotspot is set according to the distance value. For every 2cm increase in the distance value, the interval is increased by 0.5min.

5. The thermal management method for an integrated energy storage stack as described in claim 3, characterized in that: In step 2, when there are local hot spots, the heat dissipation speed is controlled according to the spacing value.

6. The thermal management method for an integrated energy storage stack as described in claim 1, characterized in that: In step 2, when moving the heat dissipation side of the all-in-one machine to a different location for heat dissipation, the all-in-one machine is tilted to a set angle for heat dissipation. When performing the next moving and offsetting heat dissipation operation, the all-in-one machine is tilted to dissipate heat in a location where heat dissipation is not being performed.

7. The thermal management method for an integrated energy storage stack as described in claim 6, characterized in that: In step 2, the timing length and the set angle are determined based on the size of the heat dissipation space. As the size of the heat dissipation space increases, the timing length and the set angle are reduced.

8. The thermal management method for an integrated energy storage stack as described in claim 7, characterized in that: In step 2, when the all-in-one machine is tilted, it is determined whether the heat dissipation side facing upward is completely unable to dissipate heat into the heat dissipation space. If so, heat dissipation is carried out at a dynamically changing set angle, and the set angle is adjusted with a dynamic change amount of 2°.

9. A thermal management system for an integrated energy storage stack, comprising an integrated unit body, wherein the integrated unit body is provided with a battery manager that receives temperature values ​​detected by various sensors; Its features are: It also includes a power mechanism and a power controller installed at the bottom end of the integrated machine body. The power mechanism includes a base supporting the integrated machine body and a power motor that drives the base to rotate. A base plate is provided at the bottom end of the base, and multiple hydraulic jacks are fixed on the base plate. The power controller controls the power motor or hydraulic jacks to start according to the above method.

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