Energy storage battery system

Abstract

The present invention provides an energy storage battery system, including a battery box, a battery cluster and an air conditioner; the battery cluster is formed with a battery air inlet and a battery air outlet that are oppositely arranged along a first horizontal direction; a first static pressure chamber located at the top of the battery box, a second static pressure chamber arranged vertically, a cold channel located between the battery air inlet and the corresponding side wall of the battery box, and a heat channel located between the battery air outlet and the corresponding side wall of the battery box are formed in the battery box, and the cold channel and the heat channel are isolated from each other; the first static pressure chamber has a first inlet and a first air hole array communicated with the upper part of the second static pressure chamber; the second static pressure chamber and the battery air inlet are distributed along a second horizontal direction, and a second air hole array communicated with the cold channel is further formed, and the second air hole array is distributed vertically. The present invention can evenly distribute cold air vertically, avoid the problem of heat accumulation in the battery modules far from the first inlet at the lower part, eliminate the need for additional pipelines, reduce the cold air circulation path, and improve the cooling efficiency.

Description

Technical Field

[0001] The present invention belongs to the technical field of power equipment, and particularly relates to an energy storage battery system. Background Art

[0002] Energy storage batteries mainly refer to storage batteries used in solar power generation equipment, wind power generation equipment, and other renewable energy storage applications. Energy storage battery systems are mostly installed outdoors and mainly include a battery box, a battery cluster (composed of multiple stacked battery modules and a high-voltage box placed on a battery rack) disposed inside the battery box, and a heat dissipation device disposed on the battery box.

[0003] Since most of the battery modules of energy storage batteries are not of ultra-high power, for reasons of stability (high core temperature and poor system temperature uniformity caused by fan failure), maintainability (fan failure requires maintenance), cost, etc., energy storage battery systems often adopt a fanless (passive natural heat dissipation) heat dissipation method, and the heat dissipation device generally uses an air conditioner. The active heat dissipation battery module with a fan can better ensure the air volume of the module (affecting the core temperature) and the consistency of the air volume of each module (affecting the core temperature difference of the system) under the drive of the fan, while the heat dissipation performance of the passive heat dissipation battery module mainly depends on whether the air volume delivered by the system is sufficient.

[0004] In the existing energy storage battery systems, due to the adoption of passive heat dissipation, at the end of the air supply duct close to the air outlet of the air conditioner, the cold air volume flowing into the battery module is relatively small because the wind speed is relatively fast. Therefore, the battery modules are often arranged far from the air outlet of the air conditioner, which leads to easy heat accumulation in the battery modules far from the air outlet of the air conditioner, resulting in a relatively high temperature rise and a relatively high temperature rise of the cores in the modules. In a specific outdoor model with a small space, this problem is more serious, making it difficult to effectively improve the use safety of the energy storage battery system. Taking a lithium battery system as an example, during operation, it is not only required that the temperature of all cores is less than the highest critical value, but also required that the temperature difference between all cores is within a certain temperature range (for example, 3°C to 5°C) during the working state or startup state. For a single battery cluster, generally, the air outlet of the air conditioner is set relatively high, and the temperature of the cores in the lower battery module is significantly higher than that of the cores in the upper battery module, affecting the reliability and safety of the use performance of the entire system. Summary of the Invention

[0005] An embodiment of the present invention provides an energy storage battery system, aiming to solve the problem that heat is easily accumulated in the battery modules far from the air outlet of the air conditioner in the existing energy storage batteries, and improve the use safety of the energy storage battery system.

[0006] To achieve the above object, the technical solution adopted by the present invention is: to provide an energy storage battery system, including:

[0007] A battery box, a battery cluster disposed within the battery box, and an air conditioner disposed outside the battery box;

[0008] The battery cluster has a battery air inlet and a battery air outlet disposed opposite to each other in a first horizontal direction;

[0009] A first static pressure chamber is formed at the top of the battery box within the battery box, a second static pressure chamber is disposed vertically, a cold channel is located between the battery air inlet and the corresponding side wall of the battery box, and a heat channel is located between the battery air outlet and the corresponding side wall of the battery box. The cold channel and the heat channel are isolated from each other;

[0010] The first static pressure chamber has a first inlet communicating with the air outlet of the air conditioner and a first air hole array communicating with the upper part of the second static pressure chamber;

[0011] The second static pressure chamber and the battery air inlet are distributed in a second horizontal direction. Another side wall of the second static pressure chamber is further formed with a second air hole array communicating with the cold channel. The second air hole array is distributed vertically, wherein the second horizontal direction is perpendicular to the first horizontal direction.

[0012] In a possible implementation, the opening area of the second air hole array in the unit distribution height gradually increases from top to bottom.

[0013] In a possible implementation, a plurality of the battery clusters are arranged at intervals in the second horizontal direction. An interval channel is formed between two adjacent battery clusters. The interval channel is isolated from both the cold channel and the heat channel. A battery side air inlet is further formed on one side of the battery cluster facing the interval channel;

[0014] An extension channel is formed between the top surface of the battery cluster and the battery box. The extension channel is isolated from both the cold channel and the heat channel. The extension channel communicates with the side wall of the first static pressure chamber through a third air hole array, and the extension channel also communicates with the top end of the interval channel.

[0015] In a possible implementation, a third static pressure chamber is further formed between the top surface of the battery cluster and the battery box. The third static pressure chamber has a second inlet communicating with the air outlet of the air conditioner and also has a fourth air hole array communicating with the extension channel;

[0016] The second inlet is disposed opposite to the battery air inlet in the first horizontal direction and is adjacent to the heat channel.

[0017] In a possible implementation, the first static pressure chamber and the second static pressure chamber are combined to form a lateral static pressure structure. There are two such lateral static pressure structures, which are symmetrically distributed on opposite sides of the heat channel in a mirror image manner, and each lateral static pressure structure is connected to the same cold channel.

[0018] In a possible implementation, the extension channel is connected to the top end of the spacer channel through a fifth air hole array.

[0019] In a possible implementation, a wind guiding inclined surface is formed on one side wall of the first static pressure chamber adjacent to the heat channel to guide the cold air entering from the first inlet towards the first air hole array.

[0020] In a possible implementation, a door is provided on one side wall of the battery box, and the air conditioner is installed on the remaining side walls of the battery box where the door is not provided.

[0021] In a possible implementation, radiation protection layers are provided on both the top and bottom surfaces of the battery box, and a heat insulation layer is provided on the side walls of the battery box.

[0022] In a possible implementation, the radiation protection layer includes an air layer and a heat insulation filler layer arranged in a stacked manner.

[0023] The solution shown in the embodiments of the present application has the following beneficial effects compared with the prior art:

[0024] 1) The cold air blown out by the air conditioner first flows into the first static pressure chamber. Since the first static pressure chamber has a relatively large space, the flow rate of the cold air is reduced. In combination with the dispersion and further deceleration of the air flow by the first air hole array, the cold air can flow into the second static pressure chamber more smoothly and evenly. Since the second static pressure chamber is a vertically arranged static pressure chamber, the cold air sinks under the action of gravity and then fills the second static pressure chamber. The cold air filling the second static pressure chamber is further evenly distributed under the dispersion action of the second air hole array. Combined with the vertical arrangement of the second air hole array, the cold air is more evenly distributed in the height direction, so as to correspond to the air inlets of the batteries at various heights in the battery cluster. The energy storage battery system of the present application can evenly distribute the cold air vertically, and sufficient cold air supply can also be obtained at positions far from the first inlet (air conditioner outlet) in the height direction, maintaining uniform air volume, effectively avoiding the problem of heat accumulation in the battery modules at low positions far from the first inlet, and improving the use safety.

[0025] 2) By reasonably arranging the heat channel and the cold channel, the structures of the first static pressure chamber and the second static pressure chamber are made simpler and more compact, without the need to set up additional pipelines, minimizing the flow path of the cold air to the greatest extent and improving the cooling efficiency. Description of the Drawings

[0026] Figure 1 The top view structural schematic diagram of the energy storage battery system provided in the first embodiment of the present invention;

[0027] Figure 2 The three-dimensional internal structure diagram of the energy storage battery system provided in the first embodiment of the present invention;

[0028] Figure 3 The top view structural schematic diagram of the energy storage battery system provided in the second embodiment of the present invention;

[0029] Figure 4 The top view structural schematic diagram of the energy storage battery system provided in the third embodiment of the present invention;

[0030] Figure 5 The three-dimensional internal structure diagram of the energy storage battery system provided in the third embodiment of the present invention;

[0031] Figure 6 The three-dimensional internal structure diagram of the energy storage battery system provided in the fourth embodiment of the present invention;

[0032] Figure 7 The top view structural schematic diagram of the energy storage battery system provided in the fifth embodiment of the present invention;

[0033] Figure 8 The three-dimensional internal structure diagram of the energy storage battery system provided in the fifth embodiment of the present invention;

[0034] Figure 9 The top view sectional structural schematic diagram of the energy storage battery system provided in the fifth embodiment of the present invention;

[0035] Figure 10 The top view structural schematic diagram of the energy storage battery system provided in the sixth embodiment of the present invention;

[0036] Figure 11 The three-dimensional external structure diagram of the energy storage battery system provided in the seventh embodiment of the present invention;

[0037] Figure 12 The internal structure schematic diagram of the energy storage battery system provided in the seventh embodiment of the present invention;

[0038] Figure 13 The cooperation schematic diagram of the battery cluster, the first static pressure chamber, the second static pressure chamber, the cold channel, the hot channel, the interval position channel, the extension channel and the third static pressure chamber adopted in the seventh embodiment of the present invention Figure 1 ;

[0039] Figure 14 The cooperation schematic diagram of the battery cluster, the first static pressure chamber, the second static pressure chamber, the cold channel, the hot channel, the interval position channel, the extension channel and the third static pressure chamber adopted in the seventh embodiment of the present invention Figure 2 ;

[0040] Figure 15 Schematic diagram of the cooperation of the battery cluster, the first static pressure chamber, the second static pressure chamber, the cold channel, the hot channel, the spacer channel, the extension channel, and the third static pressure chamber adopted in Embodiment 7 of the present invention Figure 3 ;

[0041] Figure 16 Schematic diagram of the assembly structure of the radiation protection layer and the top plate adopted in Embodiment 8 of the present invention

[0042] Description of reference numerals:

[0043] 1. Battery box; 110. Box door; 120. Top plate; 130. Air guide plate; 140. Air guide channel

[0044] 2. Battery cluster; 210. Battery air inlet; 220. Battery air outlet; 230. Battery side air inlet

[0045] 3. Air conditioner

[0046] 4. First static pressure chamber; 410. First inlet; 420. First air hole array; 430. Air guide inclined surface

[0047] 5. Second static pressure chamber; 510. Second air hole array

[0048] 6. Cold channel

[0049] 7. Hot channel

[0050] 8. Spacer channel

[0051] 9. Extension channel; 910. Third air hole array; 920. Fifth air hole array

[0052] 10. Third static pressure chamber; 1010. Second inlet; 1020. Fourth air hole array; 1030. Sixth air hole array

[0053] 11. Radiation protection layer; 1110. Air layer; 1120. Heat insulation filler layer Detailed implementation manners

[0054] In order to make the technical problems, technical solutions, and beneficial effects to be solved by the present invention clearer, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0055] In the claims, the description, and the above-mentioned accompanying drawings of the present invention, unless otherwise clearly defined, when using terms such as "first", "second", or "third", etc., are all used to distinguish different objects and are not used to describe a specific order.

[0056] In the claims, description and the above-mentioned drawings of the present invention, unless otherwise clearly defined, for orientation terms, such as the use of terms "center", "lateral", "longitudinal", "horizontal", "vertical", "top", "bottom", "inner", "outer", "upper", "lower", "front", "rear", "left", "right", "clockwise", "counterclockwise", "high", "low", etc. to indicate the orientation or positional relationship are based on the orientation and positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, so it should not be construed as limiting the specific protection scope of the present invention.

[0057] In the claims, description and the above-mentioned drawings of the present invention, unless otherwise clearly defined, if the terms "fixed connection" or "fixedly connected" are used, they should be understood in a broad sense, that is, any connection method without displacement relationship and relative rotation relationship between the two, that is, including non-detachable fixed connection, detachable fixed connection, being integrated as one, and being fixed by other devices or elements.

[0058] In the claims, description and the above-mentioned drawings of the present invention, if the terms "comprising", "having" and their variants are used, they are intended to mean "including but not limited to".

[0059] Please refer to Figures 1 to 15 , and now the energy storage battery system provided by the present invention will be described. The energy storage battery system includes a battery box 1, a battery cluster 2 disposed in the battery box 1, and an air conditioner 3 disposed outside the battery box 1; the battery cluster 2 is formed with a battery air inlet 210 and a battery air outlet 220 oppositely disposed along a first horizontal direction; a first static pressure chamber 4 is formed at the top of the battery box 1, a second static pressure chamber 5 is disposed vertically, a cold channel 6 is located between the battery air inlet 210 and the corresponding side wall of the battery box 1, and a heat channel 7 is located between the battery air outlet 220 and the corresponding side wall of the battery box 1, and the cold channel 6 and the heat channel 7 are isolated from each other; the first static pressure chamber 4 has a first inlet 410 communicating with the air outlet of the air conditioner, and a first air hole array 420 communicating with the upper part of the second static pressure chamber 5; the second static pressure chamber 5 and the battery air inlet 210 are distributed along a second horizontal direction, and another side wall of the second static pressure chamber 5 is further formed with a second air hole array 510 communicating with the cold channel 6, and the second air hole array 510 is distributed vertically, wherein the second horizontal direction is perpendicular to the first horizontal direction.

[0060] In this embodiment, the battery air inlet 210 and the battery air outlet 220 are exemplarily shown as long holes arranged horizontally, and correspond to the battery modules in each battery cluster 2 in the height direction. However, it should be understood that the number, shape, and distribution mode of the battery air inlets 210 and the battery air outlets 220 corresponding to each battery module are not limited to the manner shown in the attached drawing embodiments, and are not uniquely defined herein.

[0061] The battery box 1 in this embodiment can adopt a container-type box body or other forms of box body structures. For large-scale energy storage battery systems, the container-type box body structure is more applicable. For small-scale energy storage battery systems, it is advisable to adopt an outdoor chassis form. Therefore, the specific form of the battery box 1 is not uniquely defined.

[0062] The circulation mode of the cold air in this embodiment is generally as follows: It enters the first static pressure chamber 4 from the air outlet of the air conditioner, and then enters the second static pressure chamber 5 from the first static pressure chamber 4. Due to the continuous injection of cold air in the cold channel 6, the cold air enters the battery air inlet 210 under the action of positive pressure, takes away the heat of the battery module, and then enters the heat channel 7 from the battery air outlet 220 under the continuous pressure of the subsequent cold air. The hot air in the heat channel 7 is then discharged from the battery box 1.

[0063] The energy storage battery system provided in this embodiment has the following beneficial effects compared with the prior art:

[0064] 1) The cold air blown out by the air conditioner 3 first flows into the first static pressure chamber 4. Since the first static pressure chamber 4 has a relatively large space, the flow rate of the cold air is reduced. In combination with the dispersion and further deceleration of the air flow by the first air hole array 420, the cold air can flow into the second static pressure chamber 5 more smoothly and evenly. Since the second static pressure chamber 5 is a vertically arranged static pressure chamber, the cold air sinks under the action of gravity and then fills the second static pressure chamber 5. The cold air filling the second static pressure chamber 5 is further evenly distributed under the dispersion action of the second air hole array 510 here. Combined with the vertical arrangement of the second air hole array 510, the cold air is more evenly distributed in the height direction, so as to correspond to the battery air inlets 210 at various heights in the battery cluster 2. The energy storage battery system of the present application can evenly distribute the cold air vertically, and sufficient cold air supply can also be obtained at positions far from the first inlet 410 (air outlet of the air conditioner) in the height direction, maintaining uniform air volume, effectively avoiding the problem of heat accumulation in the battery modules far from the first inlet 410 at low positions, and improving the use safety.

[0065] 2) By reasonably arranging the heat channel 7 and the cold channel 6, the structures of the first static pressure chamber 4 and the second static pressure chamber 5 are made more simple and compact, without the need to set up additional pipelines, minimizing the circulation path of the cold air to the greatest extent and improving the cooling efficiency.

[0066] In the above embodiments, the outlet of the hot channel 7 is formed on the side wall of the battery box 1. Considering that the hot channel 7 has a large heat dissipation area, the outlet of the hot channel 7 can have a large height distribution range to facilitate the rapid discharge of hot air and form a more effective air flow circulation.

[0067] Some embodiments adopt the structure as Figures 1 to 15 shown. In order to improve the space utilization rate and shorten the path for the cold air to flow to the second static pressure chamber 5, the first static pressure chamber 4 is arranged between the battery cluster 2 and the side wall of the battery box 1. More specifically, as Figures 13 to 15 shown, since the weight of the cold air under the action of gravity in the first static pressure chamber 4 and the second static pressure chamber 5 is relatively large, the lower end surface of the first static pressure chamber 4 is lower than the upper end surface of the battery cluster 2 to facilitate the full diffusion and speed reduction of the gas in the first static pressure chamber 4.

[0068] In some embodiments, the above second pore array 510 can adopt the structures as Figure 2 , Figure 5 , Figure 6 , Figure 8 , Figure 14 shown. The opening area of the second pore array 510 in the unit distribution height gradually increases from top to bottom. In this embodiment, exemplarily, the shapes, sizes, distribution modes (rectangular array) and distribution densities of the pores in the second pore array 510 are kept consistent. As the height decreases, the number of pores gradually increases, as Figure 2 , Figure 5 , Figure 6 , Figure 8 , Figure 14 shown. Of course, the effect of uniform air flow distribution can also be achieved by adopting a certain number and an increasing opening area, etc., and no further enumeration will be made here.

[0069] To meet the energy storage requirements, a plurality of battery clusters 2 are arranged at intervals along the second horizontal direction. In this case, some embodiments adopt the structures as Figures 2 to 10 and Figure 15In the shown structure, an interval channel 8 is formed between two adjacent battery clusters 2. The interval channel 8 is isolated from both the cold channel 6 and the hot channel 7. A battery side air inlet 230 is further formed on one side of the battery cluster 2 facing the interval channel 8; an extension channel 9 is formed between the top surface of the battery cluster 2 and the battery box 1. The extension channel 9 is isolated from both the cold channel 6 and the hot channel 7. The extension channel 9 communicates with the side wall of the first static pressure chamber 4 through a third air hole array 910, and the extension channel 9 also communicates with the top end of the interval channel 8. In this embodiment, the space between two adjacent battery clusters 2 is fully utilized to expand the cold air circulation range. By providing the battery side air inlet 230 on the battery cluster 2, the effective air intake of the battery cluster 2 is increased; in this embodiment, the third air hole array 910 is provided between the extension channel 9 and the first static pressure chamber 4 to further disperse and decelerate the gas flowing out of the first static pressure chamber 4, improving the uniformity of the cold air flowing in the extension channel 9 so that the gas can pour downward into the interval channel 8 more uniformly. It should be noted that the battery air inlets 210 on different battery clusters 2 all correspond to the same cold channel 6, and the battery air outlets 220 on different battery clusters 2 all correspond to the same hot channel 7.

[0070] Some embodiments adopt structures such as Figures 6 to 8 , Figure 10 , Figures 12 to 15 shown. A third static pressure chamber 10 is further formed between the top surface of the battery cluster 2 and the battery box 1. The third static pressure chamber 10 has a second inlet 1010 communicating with the air outlet of the air conditioner and also has a fourth air hole array 1020 communicating with the extension channel 9; the second inlet 1010 is arranged opposite to the battery air inlet 210 along the first horizontal direction and is adjacent to the hot channel 7.

[0071] This embodiment is applicable to an energy storage battery system with multiple battery clusters 2. By utilizing the top space of the battery cluster 2, when there are multiple battery clusters 2, the air supply volume to the battery cluster 2 is increased and the air supply path is shortened, so that the cold air can reach the adjacent battery clusters 2 faster after entering the battery box 1 from different inlets.

[0072] During specific implementation, referring to Figure 8 , Figures 12 to 15 , a sixth air hole array 1030 communicating with the cold channel 6 is further provided on the side wall of the third static pressure chamber 10. Further, a wind guiding plate 130 is provided above the sixth air hole array 1030, and the wind guiding plate 130 is used to guide the air flow flowing out of the sixth air hole array 1030 downward. The cold air in the third static pressure chamber 10 can not only enter the interval channel 8 but also directly enter the cold channel 6, increasing the cold air volume in the cold channel 6 and enhancing the circulation power of the cold air in the battery box 1.

[0073] In some embodiments, between the first inlet 410 and the side wall of the first static pressure chamber 4, and between the second inlet 1010 and the side wall of the third static pressure chamber 10, there is a cliff-like distribution structure, so that the cold air forms a swirl after entering the first static pressure chamber 4 or the third static pressure chamber 10, further enhancing the attenuation ability of the cold air flow velocity and playing a better decelerating role.

[0074] A specific implementation manner of the above embodiment adopts the structure as Figures 12 to 15 shown. An opening directly communicating with the air outlet of the air conditioner is provided on the side wall of the battery box 1, and a wind guiding channel 140 is provided between the opening and the second inlet 1010. The setting of the third static pressure chamber 10 utilizes the space at the top of the battery cluster 2. Generally, there is a spaced arrangement between the side wall of the battery cluster 2 and the side wall of the battery box 1. In order to reduce the design difficulty of the third static pressure chamber 10, the edge of the third static pressure chamber 10 is generally roughly flush with the edge position of the corresponding battery cluster 2. Therefore, there will also be a gap between the side wall of the third static pressure chamber 10 and the battery box 1. By setting the wind guiding channel 140, not only can the requirement of introducing cold air into the third static pressure chamber 10 be met, but also the installation of the corresponding air conditioner 3 can be adapted by flexibly setting the position of the opening on the battery box 1, reducing the overall design difficulty of the energy storage battery system.

[0075] In some embodiments, the above-mentioned wind guiding channel 140 can adopt the structure as Figure 13 and Figure 15 shown. The caliber of the air inlet section of the wind guiding channel 140 gradually decreases along the air flow direction, increasing the air inlet pressure of the cold air. In order to better adapt to the installation of the air conditioner 3, the inlet of the battery box 1 can be set at a lower position than the second inlet 1010, and at the same time, the air inlet pressure can be ensured to ensure that the second inlet 1010 has sufficient air intake.

[0076] Some embodiments adopt the structure as Figures 8 to 15 shown. The first static pressure chamber 4 and the second static pressure chamber 5 are combined to form a lateral static pressure structure. There are two lateral static pressure structures, and they are symmetrically distributed on the opposite sides of the heat channel 7 in a mirror image. Each group of lateral static pressure structures is connected to the same cold channel 6.

[0077] This embodiment is applicable to the structure with an interval channel 8 provided between multiple battery clusters 2. For a system with multiple battery clusters 2, the method of only setting a set of lateral static pressure structures on one side extends the lateral flow path of the cold air. For the battery cluster 2 that is far from the lateral static pressure structure, heat accumulation is still likely to occur. Therefore, this setting method can only meet the temperature uniformity requirement of each battery cluster 2 in the height direction. To solve the problem of lateral temperature uniformity performance, this embodiment supplies cold air from both sides of the row and column structure formed by multiple battery clusters 2, shortening the lateral flow path of the cold air. Taking an energy storage battery system with two battery clusters 2 as an example, corresponding lateral static pressure structures are provided on the sides of each battery cluster 2, further shortening the flow path of the cold air, so that the cold air can reach the adjacent battery cluster 2 faster after entering the battery box 1 from different first inlets 410, and a smaller temperature difference is formed between the battery cells at different lateral positions.

[0078] In addition, whether it is the implementation method of using two sets of lateral static pressure structures, the setting method of using the third static pressure chamber 10, or the method of combining two sets of lateral static pressure structures and the third static pressure chamber 10, a "backup function" can be formed. That is, when each inlet corresponds to a different air conditioner 3, since different battery clusters 2 all correspond to the same cold channel 6 and the same hot channel 7, if one air conditioner 3 fails, the cold air of other air conditioners 3 can still enter each battery cluster 2 through the cold channel 6, preventing the battery cluster 2 near the faulty air conditioner 3 from heating up rapidly, forming a mutual backup function and extending the operable time for fault repair.

[0079] Here, an example is given to illustrate the above-mentioned "backup function". Taking the Figure 8 embodiment as an example, two first inlets 410 and one second inlet 1010 correspond to three air conditioners 3 respectively. If the left air conditioner 3 fails, the front air conditioner 3 and the right air conditioner 3 can still continuously supply air into the cold channel 6, and the cold air in the cold channel 6 can still enter the left battery cluster 2, preventing the left battery cluster 2 from heating up too fast, and the hot air can still be discharged through the hot channel 7; similarly, if the front or right air conditioner 3 fails, it is also based on a similar backup principle, which will not be elaborated here.

[0080] To improve the uniformity of the cold air entering the interval channel 8, some embodiments adopt the structure as shown in Figures 4 to 15 . The extension channel 9 is connected to the top of the interval channel 8 through the fifth air hole array 920, and the cold air is dispersed and evenly flowed again through the fifth air hole array 920. In this embodiment, the position of the fifth air hole array 920 is exemplarily set directly above the interval channel 8 to ensure the smooth flow of the cold air.

[0081] It should be noted that the first air hole array 420, the second air hole array 510, the third air hole array 910, the fourth air hole array 1020, the fifth air hole array 920, and the sixth air hole array 1030 in the above embodiments respectively include a plurality of air holes distributed in a preset array. The distribution mode of each air hole array is selectively set according to its respective different positions (including regular distribution and irregular distribution). The shape of the air holes in each air hole array can be a round hole, a square hole, etc., and is not uniquely limited here.

[0082] In some embodiments, the above-mentioned first static pressure chamber 4 can adopt a structure such as Figure 1 , Figure 2 , Figures 4 to 10 , Figures 12 to 15 shown. One side wall of the first static pressure chamber 4 adjacent to the heat channel 7 forms a wind guiding inclined surface 430 to guide the cold air entering from the first inlet 410 towards the first air hole array 420, enhancing the driving force for the cold air to flow towards the first air hole array 420; at the same time, the wind guiding inclined surface 430 can also gently provide a resistance to decelerate the airflow in the air inlet direction of the first inlet 410, reducing the influence of turbulent flow on the flow stability of the prism.

[0083] It should be noted that the static pressure chambers and channels in the above embodiments are all surrounded by respective plate bodies in cooperation with the battery box 1 and the battery cluster 2. In the attached drawing embodiments, the respective plate bodies are exemplarily set as flat plate bodies. However, it should be understood that the shape of each plate body and the spatial shape formed by the cooperation can meet various performance requirements for cold air circulation, and is not uniquely limited here.

[0084] Generally, the overall weight of the energy storage battery system is relatively heavy, and the door panel of the box door is relatively thin. In existing systems adopting passive heat dissipation methods, a backpack air conditioner is often installed on the box door. The weight of the air conditioner affects the opening and closing of the door, and also affects the overall center of gravity of the chassis, thereby affecting stability and increasing the design difficulty of the energy storage battery system. Some embodiments of the present application adopt a structure such as Figure 12 shown. One side wall of the battery box 1 is provided with a box door 110, and the air conditioner 3 is installed on the remaining side walls of the battery box 1 where the box door 110 is not provided, and can be flexibly and selectively set corresponding to different inlets (the first inlet 410 or the second inlet 1010). There is no need to set a long pipeline between the air outlet of the air conditioner and the corresponding inlet, shortening the flow path of the cold air outside the battery box 1. At the same time, it can also avoid the influence of the weight of the air conditioner 3 on the opening and closing of the box door 110, which is beneficial to maintaining the overall stability of the battery box 1.

[0085] In some embodiments, different first inlets 410 and second inlets 1010 may correspond to the same air conditioner 3; alternatively, different inlets and the air conditioner 3 have a one-to-one correspondence relationship to avoid the influence of parallel operation and backflow. In this embodiment, the different inlets are exemplarily set to have a one-to-one correspondence relationship with the air conditioner 3 to avoid laying overly long cold air circulation pipelines outside the battery box 1.

[0086] Specific examples of the air duct layout method and air conditioner layout method of the energy storage battery system of the present application are as follows:

[0087] 1) For a system with one battery cluster 2, a set of lateral static pressure structures is arranged on the left or right side of the battery cluster 2, and at the same time, one air conditioner 3 is arranged on the corresponding side to meet the cooling requirements. The cold channel 6 is located at the rear side of the battery cluster 2, and the hot channel 7 is located at the front side of the battery cluster 2, as Figure 1 and Figure 2 shown.

[0088] 2) For a system with one battery cluster 2, the air conditioner 3 is arranged on the front side of the battery cluster 2, the first static pressure chamber 4 is located on the side of the battery cluster 2 or covers a part of the space above the battery cluster 2, the cold channel 6 is located at the rear side of the battery cluster 2, and the hot channel 7 is located at the front side of the battery cluster 2, as Figure 3 shown.

[0089] 3) For a system with multiple battery clusters 2, an interval channel 8 is formed between the multiple battery clusters 2. A set of lateral static pressure structures is arranged on the left or right side of the battery box 1, and at the same time, one air conditioner 3 is arranged on the corresponding side. An extension channel 9 is formed above the battery cluster 2 adjacent to the lateral static pressure structure to ventilate the interval channel 8. Figure 5 Only the structure of two battery clusters 2 is shown. For the structure of more than two battery clusters 2, the principle is similar and will not be shown one by one.

[0090] 4) For a system with multiple battery clusters 2, an interval channel 8 is formed between the multiple battery clusters 2. A set of lateral static pressure structures are respectively arranged on the left and right sides of the battery box 1 (refer to the setting method of the two lateral static pressure structures in Figure 8 ), or a lateral static pressure structure is arranged on the left or right side, and a second static pressure chamber 5 is formed above the battery cluster 2 farther away from the lateral static pressure structure (such as the structure shown in Figure 6 ); at the same time, one air conditioner 3 is arranged on each corresponding side, and an extension channel 9 is formed above the remaining battery clusters 2 to ventilate the interval channel 8.

[0091] 5) For a system with three or more battery clusters 2, in order to meet the demand for rapid cooling of the middle battery cluster 2, a set of lateral static pressure structures is arranged on each of the left and right sides, and an air conditioner 3 is arranged on each corresponding side. At the same time, a second static pressure chamber 5 is formed above the middle battery cluster 2, and an air conditioner 3 is correspondingly arranged on the front side, as Figures 7 to 15 shown in the structure. In such embodiments, the number of air conditioners 3 can correspond one-to-one with the battery clusters 2, and the specific structure of the second static pressure chamber 5 is as shown in 7, Figure 8 , Figures 12 to 15 shown, which is basically directly above the corresponding battery cluster 2 and corresponds one-to-one with the battery cluster 2 located in the middle; if the number of air conditioners 3 is less than the number of battery clusters 2, the lateral static pressure structures on both sides respectively correspond to one air conditioner 3, and the remaining air conditioners 3 are located on the front side. At this time, the second static pressure chamber 5 no longer corresponds one-to-one with the battery cluster 2 located in the middle, presenting a branched cavity structure, as Figure 10 shown, Figure 10 The embodiment of which shows an implementation manner in which the battery cluster 2 has four, but the air conditioner 3 has three.

[0092] More embodiments are not listed one by one here, as long as the demand for uniform temperature usage performance can be met.

[0093] It should be noted that the cold air circulation modes of the above various embodiments are all shown by arrows in the figure. Among them, the solid arrows represent the cold air circulation paths, and the hollow arrows represent the hot air circulation paths.

[0094] In addition, the inventor also found that in actual use, the temperature of the battery cells in different battery modules in the battery cluster 2 is not only affected by the layout of the air conditioner and the air duct, but also the energy of solar radiation at different times and the ground reflection in different regions will affect the local battery modules, thereby affecting the uniform temperature of the entire system and exacerbating the temperature difference effect. Some embodiments of the present application adopt the structure as shown in Figure 16 shown. Radiation-proof layers 11 are provided on both the top and bottom surfaces of the battery box 1, and heat-insulating layers are provided on the side walls of the battery box 1. The radiation-proof layer 11 on the top surface can reduce the influence of solar radiation at different times, and the radiation-proof layer 11 on the bottom surface can reduce the influence of ground reflection on the lower-layer battery modules. The heat-insulating layer can isolate the energy directly irradiated by sunlight on the side wall of the battery box and the energy reflected by the ground on the side wall of the battery box, ultimately avoiding the increase in non-uniform temperature caused by the temperature rise of the upper-layer and lower-layer battery modules, and can also effectively avoid the formation of condensation in the area near the air conditioner outlet due to external energy radiation, enhancing the protection performance of the battery cluster 2.

[0095] The above radiation-proof layer 11 can adopt the structure as shown in Figure 16In the structure shown, the radiation shielding layer 11 includes an air layer 1110 and a heat insulating filler layer 1120 which are stacked. Air is a substance with the lowest thermal conductivity in nature. Forming the air layer 1110 has relatively low difficulty and cost, and at the same time can obtain better heat insulation performance. Combined with the setting of the heat insulating filler layer 1120, the radiation passing through the air layer 1110 is further isolated, effectively improving the heat insulation performance. In specific implementation, the filler of the heat insulating filler layer 1120 can be selected from materials such as heat insulating cotton, and will not be listed one by one here.

[0096] According to the actual structure of the battery box 1, in this embodiment, the radiation shielding layers 11 on the top and bottom surfaces of the battery box 1 are both set as a double-layer structure with the upper layer being the air layer 1110 and the lower layer being the heat insulating filler layer 1120. The radiation shielding layer 11 on the top surface is located below the top plate 120 of the battery box 1, and the radiation shielding layer 11 on the bottom surface is located above the bottom plate of the battery box 1, giving full play to the heat insulation advantages of each layer, simplifying the structural setting of the radiation shielding layer 11, and reducing the use cost. It should be understood that the specific arrangement quantity and arrangement order of the air layer 1110 and the heat insulating filler layer 1120 only need to meet the radiation shielding performance requirements, and are not uniquely limited here.

[0097] The above-mentioned heat insulation layer can be a heat insulating cotton layer or other material layers with heat insulation performance. The installation method can be realized by pasting on the side panel metal structure of the battery box 1, and the rest of the implementation methods will not be listed one by one here.

[0098] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, and improvements made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A energy storage battery system, characterized in that, Including: A battery box, a battery cluster disposed within the battery box, and an air conditioner disposed outside the battery box; The battery cluster is formed with a battery air inlet and a battery air outlet oppositely arranged along a first horizontal direction; A first static pressure chamber is formed at the top of the battery box within the battery box, a second static pressure chamber is arranged vertically, a cold channel is located between the battery air inlet and the corresponding side wall of the battery box, and a hot channel is located between the battery air outlet and the corresponding side wall of the battery box. The cold channel and the hot channel are isolated from each other; The first static pressure chamber has a first inlet communicating with the air outlet of the air conditioner, and a first air hole array communicating with the upper part of the second static pressure chamber; The second static pressure chamber and the battery air inlet are distributed along a second horizontal direction. Another side wall of the second static pressure chamber is further formed with a second air hole array communicating with the cold channel. The second air hole array is distributed vertically, wherein the second horizontal direction is perpendicular to the first horizontal direction; A plurality of the battery clusters are arranged at intervals along the second horizontal direction. An interval channel is formed between two adjacent battery clusters. The interval channel is isolated from both the cold channel and the hot channel. A battery side air inlet is further formed on one side of the battery cluster facing the interval channel; An extension channel is formed between the top surface of the battery cluster and the battery box. The extension channel is isolated from both the cold channel and the hot channel. The extension channel is communicated with the side wall of the first static pressure chamber through a third air hole array, and the extension channel is further communicated with the top end of the interval channel; 2. The energy storage battery system according to claim 1, wherein The opening area of the second air hole array gradually increases from top to bottom within the unit distribution height; 3. The energy storage battery system according to claim 1, characterized in that A third static pressure chamber is further formed between the top surface of the battery cluster and the battery box. The third static pressure chamber has a second inlet communicating with the air outlet of the air conditioner, and also has a fourth air hole array communicating with the extension channel; The second inlet is oppositely arranged with the battery air inlet along the first horizontal direction and is adjacent to the hot channel; 4. The energy storage battery system according to claim 1 or 3, characterized in that, The first static pressure chamber and the second static pressure chamber are combined to form a lateral static pressure structure. There are two such lateral static pressure structures, which are symmetrically distributed on opposite sides of the hot channel. Each lateral static pressure structure is communicated with the same cold channel; 5. The energy storage battery system according to claim 1, wherein, The extension channel is communicated with the top end of the interval channel through a fifth air hole array; 6. The energy storage battery system according to claim 1, characterized in that, A wind guiding inclined surface is formed on one side wall of the first static pressure chamber adjacent to the hot channel to guide the cold air entering from the first inlet to the first air hole array; 7. The energy storage battery system according to claim 1, characterized in that, One side wall of the battery box is provided with a box door, and the air conditioner is installed on the remaining side walls of the battery box where the box door is not provided; 8. The energy storage battery system according to claim 1, wherein Radiation protection layers are provided on both the top surface and the bottom surface of the battery box, and a heat insulation layer is provided on the side wall of the battery box; 9. The energy storage battery system according to claim 8, wherein The radiation protection layer includes an air layer and a heat insulation filler layer arranged in a stacked manner.

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