Heat dissipation guide plate, battery bracket, battery assembly, battery pack, energy storage battery cabinet and energy storage system

Abstract

A heat dissipation air guide plate, a battery bracket, a battery assembly, a battery pack, an energy storage battery cabinet and an energy storage system using the heat dissipation air guide plate, the heat dissipation air guide plate is suitable for contacting with a battery and used for heat dissipation of the battery, the heat dissipation air guide plate is internally formed with an air inlet chamber and air outlet chambers adjacent to both sides of the air inlet chamber; one side of the heat dissipation air guide plate is provided with an air inlet connected to the air inlet chamber, and the other opposite side of the heat dissipation air guide plate is provided with two air outlets, the two air outlets are respectively connected to the two air outlet chambers; the position where the air inlet chamber is adjacent to the air outlet chamber is connected through an air hole. The purpose is to improve the heat dissipation uniformity of batteries at various locations in a battery assembly, a battery pack, an energy storage battery cabinet and an energy storage system.

Description

Technical Field

[0001] The present invention relates to the field of batteries, and in particular to a heat dissipation and air guide plate, a battery bracket, a battery assembly, a battery pack, an energy storage battery cabinet and an energy storage system. Background Art

[0002] With the development of electrochemical energy storage technology, energy storage is increasingly used in the power industry, and there are strict requirements for the stability of energy storage battery cabinets and energy storage systems. Energy storage battery cabinets are usually large in size. The existing air cooling solutions usually cause uneven heat dissipation in various batteries due to the difference in flow resistance and temperature changes in the flow path when the cooling gas flows over a large span, so there is room for improvement. Summary of the invention

[0003] In view of this, the present invention aims to provide a heat dissipation air guide plate, a battery bracket, a battery assembly, a battery pack, an energy storage battery cabinet and an energy storage system using the heat dissipation air guide plate, aiming to improve the heat dissipation uniformity of batteries in various locations in the battery assembly, the battery pack, the energy storage battery cabinet and the energy storage system.

[0004] The technical solution of the present invention is as follows.

[0005] A heat dissipation air guide plate is suitable for contacting with a battery and used for dissipating heat from the battery, wherein an air inlet chamber and air outlet chambers adjacent to both sides of the air inlet chamber are formed inside the heat dissipation air guide plate; an air inlet connected to the air inlet chamber is provided on one side of the heat dissipation air guide plate, and two air outlets are provided on the other opposite side of the heat dissipation air guide plate, and the two air outlets are respectively connected to the two air outlet chambers; the positions where the air inlet chamber and the air outlet chamber are adjacent are connected through air holes.

[0006] In some embodiments, the heat dissipation and air guide plate includes:

[0007] a housing forming a chamber therein; and

[0008] Two partitions, the two partitions are arranged in the chamber at intervals, and the chamber is divided into an air inlet chamber located between the two partitions and two air outlet chambers located between the partition and the shell;

[0009] The partition plate is provided with a plurality of air holes distributed along the air outlet direction.

[0010] In some embodiments, the apertures of the plurality of air holes increase gradually or tend to increase along the direction from the air inlet to the air outlet.

[0011] In some embodiments, the spacing between the plurality of air holes decreases or shows a decreasing trend along the direction from the air inlet to the air outlet.

[0012] In some embodiments, the volume of the air inlet chamber accounts for one third to one half of the volume of the internal chamber of the housing.

[0013] A battery bracket, comprising:

[0014] Two spaced-apart bottom plates for supporting the battery;

[0015] Two end plates, respectively connected to the bottom plate and used to constrain two sides of the battery; and

[0016] Any of the above-mentioned heat dissipation and air guide plates, wherein the heat dissipation and air guide plate is arranged in the interval between the base plates and is used for thermal contact with the battery.

[0017] In some embodiments, a heat dissipation duct is provided through at least one of the base plates, and the heat dissipation duct extends in a direction from the air inlet to the air outlet.

[0018] In some embodiments, the battery holder further includes two baffles, which are respectively disposed on the two bottom plates and are used to stop both ends of the battery.

[0019] A battery assembly, comprising:

[0020] Any of the above battery holders; and

[0021] Multiple single cells;

[0022] The battery assembly has a predetermined length direction and a width direction perpendicular to the length direction, the plurality of single cells are arranged along the width direction of the battery assembly, and the thickness direction of the single cells is consistent with the width direction of the battery assembly, and the length direction of the single cells is consistent with the length direction of the battery assembly and extends from one side of the length direction of the battery assembly to another opposite side;

[0023] The bottoms of the plurality of single cells are at least partially supported on the bottom plate, and the two end plates are clamped on both sides of the plurality of single cells in a thickness direction; the heat dissipation and air guide plates are in thermal contact with the single cells.

[0024] A battery pack comprises a plurality of the battery assemblies described above; the battery assembly has a height direction perpendicular to its length direction and width direction, and the plurality of battery assemblies are stacked along the height direction.

[0025] In some embodiments, the battery pack includes K battery components, 2≤ K ≤ 16.

[0026] In some embodiments, the battery module includes an even number of single cells; the single cells include a positive terminal and a negative terminal, and the positive terminal and the negative terminal are respectively located at two opposite ends in the length direction of the single cells.

[0027] An energy storage battery cabinet, comprising:

[0028] Cabinet;

[0029] Any of the aforementioned battery packs is installed and accommodated in the cabinet;

[0030] An air conditioning assembly, installed on the cabinet and used to adjust the temperature inside the cabinet; and

[0031] The battery manager is electrically connected to the battery pack and is used to manage the battery pack.

[0032] An energy storage system comprises at least one of the above-mentioned energy storage battery cabinets.

[0033] The aforementioned heat dissipation air guide plate, the battery holder, battery assembly, battery pack, energy storage battery cabinet and energy storage system using the heat dissipation air guide plate, the heat dissipation air guide plate has an air inlet chamber and air outlet chambers adjacent to both sides of the air inlet chamber formed inside; one side of the heat dissipation air guide plate is provided with an air inlet connected to the air inlet chamber, and the other opposite side of the heat dissipation air guide plate is provided with two air outlets, and the two air outlets are respectively connected to the two air outlet chambers; the positions where the air inlet chamber and the air outlet chamber are adjacent are connected through air holes. In this way, the cooling airflow entering the middle air inlet chamber can flow through the air inlet chamber itself and enter the air outlet chambers on both sides through the air holes, so that the batteries in contact with the positions of each chamber can all dissipate heat. At the same time, setting the air inlet on one side of the air inlet chamber, rather than letting in air from the entire side of the heat dissipation air guide plate, can reduce the area of ​​the air inlet and avoid the situation where the air volume and wind speed are too small. After the cold air from the air conditioner absorbs the heat generated by the batteries around the air inlet, the cold air volume decreases and the temperature rises. The further it flows toward the air outlet, the higher the temperature, resulting in uneven heat dissipation between the batteries near the air inlet and the batteries near the air outlet, and a large temperature difference. In summary, the uniformity of heat dissipation of the batteries in contact with the locations of the chambers can be achieved.

[0034] Additional aspects and advantages of the present invention will be given in part in the following description and in part will be obvious from the following description, or will be learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0036] Figure 1 is a schematic structural diagram of an energy storage system according to an embodiment of the present invention.

[0037] Figure 2 yes Figure 1 Schematic diagram of the structure of the energy storage battery cabinet, in which the cabinet door is in the open state.

[0038] Figure 3 yes Figure 2 The schematic diagram of the structure of the battery pack in the energy storage battery cabinet is shown, and the air inlet direction is shown.

[0039] Figure 4 yes Figure 2 The schematic diagram of the internal frame of the energy storage battery cabinet is shown, and the cooling flow path is shown.

[0040] Figure 5 yes Figure 3 Schematic diagram of the structure of the battery components in the battery pack shown.

[0041] Figure 6 yes Figure 5 Schematic diagram of the structure of the battery bracket in the battery assembly shown.

[0042] Figure 7 for Figure 6 The schematic diagram of the structure of the heat dissipation and air guide plate in the battery bracket is shown.

[0043] Figure 8 for Figure 7 A top view of the heat dissipation guide plate is shown, and the air circulation path is shown.

[0044] Fig. 9 for Figure 7 A schematic plan view of the air hole side of the heat dissipation air guide plate shown.

[0045] Reference numerals:

[0046] Energy storage system 1000, energy storage battery cabinet 100, distribution box 200, installation frame 300

[0047] Cabinet 11, battery pack 12, air conditioning component 13, battery manager 14,

[0048] Battery assembly 120, single battery 121, battery bracket 122, heat dissipation duct 1211,

[0049] Bottom plate 1210, end plate 1220, heat dissipation guide plate 1230, baffle plate 1240,

[0050] Air inlet chamber 1231 , air outlet chamber 1232 , air inlet 1233 , air hole 1234 , and air outlet 1235 . DETAILED DESCRIPTION

[0051] Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0052] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0053] In the description of the present invention, "plurality" means two or more than two, and "several" means one or more.

[0054] The specific implementation modes of the present invention are described in detail below with reference to the accompanying drawings.

[0055] like Figure 1 As shown, an energy storage system 1000 is disclosed, including a plurality of energy storage battery cabinets 100 and a distribution box 200. The energy storage system 1000 may generally be a household energy storage system or a commercial energy storage system, and the number of energy storage battery cabinets 100 included therein may be set according to specific needs. The plurality of energy storage battery cabinets 100 are electrically connected to the distribution box 200 to achieve power distribution management. In some embodiments, the energy storage system 1000 may further include a mounting frame 300, and the energy storage battery cabinet 100 and the distribution box 200 may both be mounted on the mounting frame 300.

[0056] like Figure 2 As shown, the energy storage battery cabinet 100 may include a cabinet 11, a battery pack 12, an air conditioning component 13, and a battery manager 14. A receiving space is formed inside the cabinet 11, and the battery pack 12 is received inside the cabinet 11. The air conditioning component 13 is installed on the cabinet 11, and can usually be installed inside the cabinet 11, such as hanging on the inner wall of the cabinet 11, or can be installed outside the cabinet 11, to adjust the internal working temperature of the energy storage battery cabinet 100. The battery manager 14 can be used for charge and discharge management of the battery pack 12.

[0057] like Figures 3 to 9 As shown, the battery pack 12 includes a plurality of battery assemblies 120 .

[0058] Since the architecture of the energy storage system 1000 and the above-mentioned structural hierarchy of the energy storage battery cabinet 100 are not the focus of the improvement of this case, and there are many typical implementation methods of the above-mentioned structural hierarchy in the prior art, they will not be described in detail here. In this application, the improvement of the energy storage system 1000 and the energy storage battery cabinet 100 mainly depends on the battery pack 12 and the battery assembly 120, so the specific implementation methods of the battery pack 12 and the battery assembly 120 are mainly described in detail below.

[0059] In the battery pack 12, the battery assembly 120 has a preset length direction, width direction and height direction, and the length direction, width direction and height direction are perpendicular to each other. The multiple battery assemblies 120 are stacked along the height direction. The height direction here can be understood as the vertical direction. Usually, in actual applications, the height direction of the energy storage system 1000 or the energy storage battery cabinet 100 included therein after it is placed or installed is the vertical direction. The battery pack 12 is roughly rectangular in shape. Therefore, for ease of understanding, the direction of the battery assembly 120 that is the same as the vertical direction under normal use is defined as its height direction, and accordingly, its length direction and width direction are defined in the horizontal direction.

[0060] The battery pack 10 includes a plurality of battery assemblies 120, and the plurality of battery assemblies 120 are stacked in the height direction. For example, in some embodiments, the battery pack includes K battery assemblies 120, 2≤ K ≤ 16. Adjacent battery assemblies 120 can be installed and fixed by connecting between battery brackets 122. For example, the battery brackets 122 of adjacent battery assemblies 120 can be fixed by screw connection.

[0061] In some embodiments, the battery assembly 120 includes an even number of single cells 121; the single cells 121 include a positive terminal and a negative terminal, and the positive terminal and the negative terminal are respectively located at two opposite ends in the length direction of the single cell 121. In this way, the positive terminal and the negative terminal of the single cell 121 are located on opposite sides, and the even number arrangement facilitates the connection between the upper and lower battery assemblies 120.

[0062] The battery assembly 120 includes a plurality of single batteries 121 and a battery bracket 122 .

[0063] The single cell 121 is roughly in the shape of a cuboid. The single cell 121 is roughly in the shape of a cuboid, which means that the main part of the single cell 121 is in the shape of a cuboid, but because the single cell 121 usually also includes electrode terminals, explosion-proof valves and other structures located at the ends of the main part, the overall shape is not strictly a cuboid, or due to factors such as dimensional shape tolerances and local irregularities, the overall shape is not strictly a cuboid, but generally meets the cuboid shape. Accordingly, the length of the single cell 121 can be understood as the length of the main part of the single cell 121, that is, the part excluding the electrode terminals.

[0064] The plurality of single cells 121 are arranged along the width direction of the battery assembly 120, and the thickness direction of the single cells 121 is consistent with the width direction of the battery assembly 120, and the length direction of the single cells 121 is consistent with the length direction of the battery assembly 120. At the same time, each single cell 121 extends from one side of the length direction of the battery assembly 120 to the other opposite side. In other words, only one single cell 121 is arranged in the length direction of each battery assembly 120, and the single cell 121 is arranged from one side to the other side as a whole. No auxiliary reinforcement is required along the length direction of the battery assembly 120, which can ensure a high volume utilization rate and energy density. At the same time, the plurality of single cells 121 are arranged along the width direction of the battery assembly 120, which can form a limit and reinforcement between each other, and the single cells can also play an auxiliary reinforcement role in the length direction of the formed battery assembly 120, thereby ensuring the overall structural strength of the battery assembly 120.

[0065] The battery support 122 includes a bottom plate 1210 extending along the width direction of the battery assembly 120, an end plate 1220 connected to two opposite ends of the bottom plate 1210, and a heat dissipation and air guide plate 1230. The bottoms of the plurality of single batteries 121 are at least partially supported on the bottom plate 1210, and the two end plates 1220 are sandwiched between the two sides of the plurality of single batteries 121 in the thickness direction.

[0066] By providing a battery holder 122, a plurality of single cells 121 can be fixed by the battery holder 122, so that the structural strength of the battery holder 122 itself can be used to assist in improving the structural strength of the single cells 121, so that the number of battery assemblies 120 that can be arranged in the battery holder 122, the energy storage battery cabinet 100 and the energy storage system 1000 can be greater. For example, in the battery holder 122, the number of battery assemblies 120 can be 6-20 and they can be stacked in sequence in the height direction, so that the volume utilization rate of the energy storage battery cabinet 100 and the energy storage system 1000 is greater and the energy density is higher.

[0067] Specifically, the battery support 122 includes two bottom plates 1210, which are arranged at intervals and supported at the two ends of the length direction of the single battery 121, respectively, and the two ends of the two end plates 1220 are respectively fixed on the two bottom plates 1210. In this way, the interval between the two bottom plates 1210 forms an air duct gap, and the heat dissipation air guide plate 1230 is arranged in the interval between the two bottom plates 1210, that is, in the air duct gap, and is used to be in thermal contact with the single battery 121, dissipate heat for the single battery 121, make the single battery 121 less susceptible to heat damage, extend the service life of the energy storage battery cabinet 100, or meet the needs of high-power charging.

[0068] The heat dissipation air guide plate 1230 may be in the shape of a rectangular flat plate, and has an air inlet chamber 1231 and air outlet chambers 1232 adjacent to both sides of the air inlet chamber 1231 formed therein. An air inlet 1233 communicating with the air inlet chamber 1231 is provided on one side of the heat dissipation air guide plate 1230, and two air outlets 1235 are provided on the other opposite side of the heat dissipation air guide plate 1230, and the two air outlets 1235 are respectively communicated with the two air outlet chambers 1232. The positions adjacent to the air inlet chamber 1231 and the air outlet chamber 1232 are communicated through air holes 1234.

[0069] In this way, the cooling airflow entering the central air inlet chamber 1231 can flow through the air inlet chamber 1231 itself and enter the air outlet chambers 1232 on both sides through the air holes 1234, so that the batteries in contact with the positions of each chamber can dissipate heat. At the same time, the air inlet 1233 is set on one side of the air inlet chamber 1231, rather than the entire side of the heat dissipation guide plate 1230, which can reduce the area of ​​the air inlet 1233 and avoid the situation where the air volume and wind speed are too small. After the cold air blown from the air conditioning component 13 absorbs the heat generated by the surrounding batteries at the air inlet 1233, the cold air volume decreases and the temperature rises. The closer it flows to the air outlet 1235, the higher the temperature, resulting in uneven heat dissipation and excessive temperature difference between the batteries near the air inlet 1233 and the batteries near the air outlet 1235. In summary, the uniformity of heat dissipation of the batteries in contact with the positions of each chamber can be achieved.

[0070] In other words, three cavities are provided in the heat dissipation air guide plate 1230, the middle cavity is the air inlet chamber 1231, and the other two cavities are located on both sides thereof, which are the air outlet chambers 1232. The three cavities are all set up with one side open and the other side closed. The open side of the middle air inlet chamber 1231 is the air inlet 1233, and the other opposite side of the air inlet chamber 1231 is closed, and the closed side is on the same side as the return air outlet of the air conditioning component 13. The cavities on both sides are the air outlet chambers 1232, and the open side of the air outlet chamber 1232 is the air outlet 1235, which is on the same side as the return air outlet of the air conditioning component 13, and the other opposite sides of the two air outlet chambers 1232 are closed. The reason for closing the air outlet of the middle air inlet chamber 1231 is to prevent the cold air blown into the air inlet duct by the air conditioning component 13 from being directly discharged through the return air outlet of the air conditioning component 13 without cooling the batteries on both sides, resulting in the batteries on both sides not being able to be fully cooled. The reason for closing the air inlet of the air outlet chamber 1232 on both sides is to reduce the area of ​​the air inlet 1233 to avoid the situation where the air volume and wind speed are too small. After the cold air blown from the air-conditioning component 13 absorbs the heat generated by the batteries around the air inlet 1233, the cold air volume decreases and the temperature rises. The further it flows toward the air outlet 1235, the higher the temperature. This will cause uneven heat dissipation between the batteries near the air inlet 1233 and the batteries near the air outlet 1235, and excessive temperature difference.

[0071] In a specific implementation, the heat dissipation and air guide plate includes a shell and two partitions. The interior of the shell forms a chamber. The two partitions are arranged in the chamber at intervals, and the chamber is divided into an air inlet chamber 1231 located between the two partitions and two air outlet chambers 1232 located between the partition and the shell.

[0072] A plurality of air holes 1234 are distributed on the partition along the air outlet direction.

[0073] In some embodiments, the apertures of the plurality of pores 1234 increase or increase along the direction from the air inlet 1233 to the air outlet 1235. In other embodiments, the spacing between the plurality of pores 1234 decreases or decreases along the direction from the air inlet 1233 to the air outlet 1235. The increasing trend here can be understood as that among the plurality of pores, the apertures of some pores may be the same, but the overall pores increase, and the decreasing spacing trend can be understood in the same way. Of course, in a specific implementation, the increasing aperture and decreasing spacing can be implemented simultaneously.

[0074] The middle air inlet chamber 1231 has air holes 1234 on both sides. The cold air blown in by the air conditioning assembly 13 passes through the air inlet chamber 1231 to dissipate heat to the batteries in the middle part, and at the same time, flows to the air outlet chambers 1232 on both sides through these air holes 1234 to dissipate heat to the batteries on both sides. In a specific implementation, the air holes 1234 can be distributed on both sides of the air inlet chamber 1231. In the distance from the air inlet 1233 of the air inlet chamber 1231 to the air outlet 1235 of the air outlet chambers 1232 on both sides, the area of ​​the air holes changes from small to large, and the spacing between the air holes gradually decreases. The reason for such a setting is that the air volume is the largest at the air inlet 1233 of the air inlet chamber 1231. Therefore, the air holes on both sides of the air inlet chamber 1231 are opened small near the air inlet 1233 to prevent the cold air from directly flowing into the air outlet chambers 1232 on both sides, and lowering the surface temperature of the battery near the air inlet 1233. This will cause the cold air to flow to the air outlet 1235, and the higher the air flow temperature, the battery near the air outlet 1235 cannot be fully cooled, and there will be a large temperature difference between the battery surface temperature at the air inlet 1233 and the battery surface at the air outlet 1235. Based on this, the uniformity of heat dissipation of the single cells 121 in the entire battery assembly 120 can be improved. The setting of the spacing of the air holes 1234 is also based on the same reason.

[0075] In some embodiments, the volume of the air inlet chamber 1231 accounts for one third to one half of the volume of the internal chamber of the housing. The reason for this setting is to control the area of ​​the air inlet 1233, increase the flow rate of the air inlet, reduce the heat conduction between the battery and the cold air at the air inlet 1233, reduce the temperature of the cold air near the air outlet 1235 as much as possible, and increase the uniformity of the heat dissipation of the battery.

[0076] In some embodiments, at least one of the bottom plates 1210 is provided with a heat dissipation duct 1211 extending from the air inlet 1233 toward the air outlet 1235. In this way, when the ends of the single battery 121 are supported on the bottom plate 1210, the ends of the battery can also dissipate heat through the heat dissipation duct in the bottom plate 1210, further improving the uniformity of heat dissipation of the battery.

[0077] In some embodiments, the battery holder further includes two baffles 1240, which are respectively disposed on the two bottom plates 1210 and are used to stop the two ends of the length direction of the single battery 121. Specifically, the width of the baffle 1240 may be smaller than the width of the corresponding bottom plate 1210, and the baffle 1240 may be stacked and fixed on the upper side of the corresponding bottom plate 1210, and the outer side of the baffle 1240 in the width direction may be substantially flush with the outer side of the bottom plate 1210, and the inner side and the bottom plate 1210 together form a stop step, and when the temperature end of the single battery 121 is supported on the corresponding bottom plate 1210, the end is stopped and positioned by the stop step.

[0078] In some embodiments, among the plurality of single cells 121, at least some of the adjacent single cells 121 are preset with gaps, and the gaps are filled with an isolation dielectric layer. In a specific implementation, the isolation dielectric layer can be made of insulating and heat-insulating materials, which can reduce the impact of transportation vibration and battery expansion on the battery assembly 1, and can also prevent heat propagation between single cells, reduce the risk of damage to the battery module structure and thermal runaway, and can also play an insulating role. The isolation dielectric layer 123 can partially fill the corresponding gaps. For example, the isolation dielectric layer may include a limiting part and an isolation part. The thickness of the limiting part may be roughly the same as the distance of the gap, and is used to limit the position between adjacent single cells 121. The thickness of the isolation part is less than the distance of the gap, so that a partial gap is retained between adjacent single cells 121, reducing the impact of transportation vibration and battery expansion on the battery assembly 1.

[0079] In some embodiments, a buffer layer is disposed between at least one of the end plates 1220 and the adjacent single battery 121. The buffer layer may be made of foam, and the end plate 1220 is provided with foam, which can be used to buffer the expansion force generated by the single battery 121 during use. At the same time, since the buffer layer 124 can be elastically retractable, it can be used to offset the accumulation of dimensional tolerances during assembly.

[0080] In the description of this specification, the description with reference to the terms "specific embodiment", "specific example", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example.

[0081] Although the embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. A battery bracket, characterized in that: include: Two spaced-apart bottom plates for supporting single cells; Two end plates, respectively connected to the bottom plate and used to constrain two sides of the single battery; and The heat dissipation air guide plate is suitable for contacting with the single battery and used for heat dissipation of the single battery, the single battery is fixed by a battery bracket, and an air inlet chamber and an air outlet chamber adjacent to both sides of the air inlet chamber are formed inside the heat dissipation air guide plate; an air inlet connected to the air inlet chamber is provided on one side of the heat dissipation air guide plate, and two air outlets are provided on the other opposite side of the heat dissipation air guide plate, and the two air outlets are respectively connected to the two air outlet chambers; the position where the air inlet chamber is adjacent to the air outlet chamber is connected through an air hole; The two bottom plates are arranged at intervals and are respectively supported at two ends of the single battery in the length direction. The interval between the two bottom plates forms an air duct gap, and the heat dissipation air guide plate is arranged in the air duct gap.

2. The battery holder according to claim 1, characterized in that: The heat dissipation and air guide plate comprises: a housing forming a chamber therein; and Two partitions, the two partitions are arranged in the chamber at intervals, and the chamber is divided into an air inlet chamber located between the two partitions and two air outlet chambers located between the partition and the shell; The partition plate is provided with a plurality of air holes distributed along the air outlet direction.

3. The battery holder according to claim 2, characterized in that: The apertures of the plurality of air holes tend to increase from the air inlet to the air outlet.

4. The battery holder according to claim 2 or 3, characterized in that: The spacing between the plurality of air holes decreases from the air inlet to the air outlet.

5. The battery holder according to claim 2, characterized in that: The volume of the air inlet chamber accounts for one third to one half of the volume of the inner chamber of the shell.

6. The battery holder according to any one of claims 1-3 and 5, characterized in that: A heat dissipation duct is provided through at least one of the base plates, and the heat dissipation duct extends in a direction from the air inlet to the air outlet.

7. The battery holder according to any one of claims 1-3 and 5, characterized in that: The battery support further comprises two baffles, which are respectively arranged on the two bottom plates and are used to stop the two ends of the single battery.

8. A battery assembly comprising: The battery holder according to any one of claims 1 to 7; and Multiple single cells; The battery assembly has a predetermined length direction and a width direction perpendicular to the length direction, the plurality of single cells are arranged along the width direction of the battery assembly, the thickness direction of the single cells is consistent with the width direction of the battery assembly, the length direction of the single cells is consistent with the length direction of the battery assembly, and the single cells extend from one side of the length direction of the battery assembly to another opposite side; The bottoms of the plurality of single cells are at least partially supported on the bottom plate, and the two end plates are sandwiched on both sides of the plurality of single cells in a thickness direction; The heat dissipation and air guide plate is in thermal contact with the single battery.

9. A battery pack, characterized in that: The battery pack comprises a plurality of battery assemblies as claimed in claim 8; the battery assembly has a height direction perpendicular to its length direction and width direction, and the plurality of battery assemblies are stacked along the height direction.

10. The battery pack according to claim 9, characterized in that: The battery pack includes K battery components, 2≤K≤16.

11. The battery pack according to claim 9, characterized in that: The battery assembly includes an even number of single cells; the single cells include a positive terminal and a negative terminal, and the positive terminal and the negative terminal are respectively located at two opposite ends of the single cells in the length direction.

12. An energy storage battery cabinet, characterized in that: include: Cabinet; The battery pack according to any one of claims 9 to 11 is installed and accommodated in the cabinet; An air conditioning assembly, installed on the cabinet and used to adjust the temperature inside the cabinet; and The battery manager is electrically connected to the battery pack and is used to manage the battery pack.

13. An energy storage system, characterized in that: Comprising at least one energy storage battery cabinet as claimed in claim 12.

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