Battery pack and energy storage system

Abstract

The utility model discloses a battery pack and an energy storage system, and relates to the technical field of energy storage equipment, the battery pack comprises a battery pack, a heat exchange plate, a first heat insulation layer and a heat preservation layer which are stacked in sequence; the heat exchange plate is provided with a top surface, a bottom surface and a plurality of side surfaces, the top surface faces the battery pack, the bottom surface faces the first heat insulation layer, the plurality of side surfaces are adjacent to the top surface and the bottom surface respectively, a heat exchange runner is formed in the heat exchange plate, and at least one side surface is provided with a sealing part for sealing the heat exchange runner; the heat preservation layer is provided with a first heat preservation part covering the first heat insulation layer and a second heat preservation part, and the second heat preservation part is located on the edge of the first heat preservation part, extends in the direction close to the battery pack and covers the sealing part. The heat exchange plate and the external environment are separated by the first heat insulation layer and the heat preservation layer, the influence of the external environment temperature on the heat exchange plate is reduced, the first heat insulation layer and the heat preservation layer have the heat preservation effect, the condensation phenomenon is reduced, the safety problem of the battery pack caused by condensate water is reduced, and the safety of the battery pack is improved.

Description

Technical Field

[0001] This utility model relates to the field of energy storage equipment technology, and in particular to a battery pack and energy storage system. Background Technology

[0002] The normal operating temperature range of a battery pack is typically 25~40℃. If the battery pack's operating temperature exceeds this range, it can cause minor issues such as capacity decay and power loss, affecting its lifespan; in severe cases, it can lead to the dissolution of the internal battery structure, electrolyte decomposition accompanied by other exothermic side reactions, ultimately resulting in thermal runaway. To prevent thermal runaway, battery packs are usually equipped with heat exchange plates. These heat exchange plates have advantages such as high specific heat capacity and rapid cooling, enabling more effective control of the battery pack's operating temperature and ensuring stable operation.

[0003] When the ambient humidity is too high or the temperature difference with the environment is too large, the coolant in the heat exchange plate can easily reach the dew point temperature, causing a large amount of condensate to form at the bottom of the heat exchange plate. Since there are many electrical components inside the battery pack, the condensate may cause safety risks such as insufficient safety distances and short circuits. Existing technology uses dehumidifiers to regulate the humidity of the operating environment, but this solution cannot completely avoid the generation of condensate, and the safety of the battery pack is still not guaranteed. Utility Model Content

[0004] The purpose of this utility model is to provide a battery pack and energy storage system, which adds a first heat insulation layer and a heat preservation layer to one side of the heat exchange plate, effectively separating the heat exchange plate from the external environment, reducing the generation of condensate on the heat exchange plate, and solving the technical problem that the safety of existing battery packs cannot be guaranteed due to the generation of condensate on the heat exchange plate.

[0005] To achieve the above objectives, this utility model provides a battery pack, comprising a battery group, a heat exchange plate, a first heat insulation layer, and a heat preservation layer stacked sequentially.

[0006] The heat exchange plate has a top surface, a bottom surface and multiple sides. The top surface faces the battery pack and the bottom surface faces the first heat insulation layer. The multiple sides are adjacent to the top surface and the bottom surface respectively and form heat exchange channels inside the heat exchange plate. At least one side is provided with a sealing part to close the heat exchange channels.

[0007] The insulation layer has a first insulation portion and a second insulation portion that cover the first insulation layer. The second insulation portion is located at the edge of the first insulation portion and extends toward the battery pack. The second insulation portion covers the sealing portion.

[0008] Preferably, the top surface is provided with an inlet and an outlet that connect to the heat exchange channel, and the inlet and outlet are located on the side of the top surface near the sealing part.

[0009] Preferably, the insulation layer extends to the side of the top surface where the water inlet and outlet are located, and the insulation layer covers part of the top surface.

[0010] Preferably, the insulation layer includes insulation cotton and / or an insulation coating.

[0011] Preferably, a plurality of parallel guide plates are fixed inside the heat exchange plate, and a guide channel is formed between any two adjacent guide plates. All guide channels are connected end to end to form a heat exchange flow channel. All guide channels include a first channel opposite to the first heat zone and a second channel opposite to the second heat zone. The width of the first channel is smaller than the width of the second channel.

[0012] The height of the flow channel ranges from 5 to 100 mm, the width of the first channel ranges from 5 to 90 mm, the width of the second channel ranges from 10 to 100 mm, and the length of the heat exchange channel ranges from 1000 to 15000 mm.

[0013] Preferably, a sealing portion is fixed on the same side of both the heat exchange plate and the first insulation layer.

[0014] Preferably, the sealing part is a plug welded to the side plate.

[0015] Preferably, it further includes a second heat insulation layer, which is stacked between the heat exchange plate and the first heat insulation layer; two sealing parts are respectively provided at both ends of the second heat insulation layer;

[0016] The second insulation layer contains several parallel partitions, and a vacuum cavity is formed between any two adjacent partitions.

[0017] The height of the vacuum channel ranges from 5 to 100 mm, the width of the vacuum channel ranges from 5 to 100 mm, and the total length of all vacuum channels ranges from 1000 to 15000 mm.

[0018] Preferably, it further includes:

[0019] Temperature and humidity detection device, which is located inside the first insulation layer;

[0020] Heating element, the heating element is disposed within the first heat insulation layer;

[0021] The controller is electrically connected to the temperature and humidity detection device and the heating element respectively; when the temperature and humidity detection device detects that the current temperature and humidity in the first insulation layer reaches the preset temperature and humidity, the controller starts the heating element.

[0022] Preferably, the first heat insulation layer includes at least one set of first detection positions and second detection positions arranged opposite to each other, with each set of first detection positions and second detection positions respectively located close to the two sealing parts;

[0023] Both the first and second detection positions are equipped with a temperature and humidity detection element and a heating element, with the heating element located between the temperature and humidity detection element and the sealing part.

[0024] Preferably, the heat exchange plate includes a first cold plate and a second cold plate arranged side by side;

[0025] One end of the first cold plate and the second cold plate are fixedly connected by the first crossbeam, and the other end of the two plates are fixedly connected by the second crossbeam.

[0026] A first flow channel is formed inside the first cold plate, and a second flow channel is provided in the second cold plate. The first flow channel and the second flow channel are connected to form a heat exchange flow channel.

[0027] This utility model also provides an energy storage system, including a frame and the aforementioned battery pack, with the battery pack arranged within the frame.

[0028] Compared to the prior art, this utility model optimizes the battery pack by adding a first heat insulation layer and a heat preservation layer. The battery pack, heat exchange plate, first heat insulation layer, and heat preservation layer are stacked sequentially. At least one side of the heat exchange plate is provided with a sealing part that closes the heat exchange flow channel. The heat preservation layer has a first heat preservation part and a second heat preservation part that cover the first heat insulation layer. The second heat preservation part is located at the edge of the first heat preservation part and extends towards the battery pack. The second heat preservation part covers the sealing part. The heat preservation layer completely covers the first heat insulation layer and the sealing part provided on its side, so that the first heat insulation layer and the heat preservation layer effectively isolate the heat exchange plate from the external environment, preventing the heat exchange plate from being directly exposed to the external environment and reducing the impact of the external environment temperature on the heat exchange plate. Moreover, the two also work together to provide heat preservation, reducing the temperature difference between the heat exchange plate and the external environment, which can effectively reduce the occurrence of condensation at the sealing part, thereby reducing the safety problems caused by condensation on the heat exchange plate of the battery pack and improving the safety of the battery pack. Attached Figure Description

[0029] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort.

[0030] Figure 1 A schematic diagram of the battery pack provided in an embodiment of this utility model;

[0031] Figure 2 An exploded view of the liquid cooling assembly provided in an embodiment of this utility model;

[0032] Figure 3 For the appendix Figure 1 A magnified view of part A in the image;

[0033] Figure 4 for Figure 2 Schematic diagram of the heat exchanger plate;

[0034] Figure 5 for Figure 2 Schematic diagram of the second insulation layer;

[0035] Figure 6 for Figure 2 A schematic diagram showing the distribution of temperature and humidity sensors and heating elements in the first insulation layer.

[0036] The attached figures are labeled as follows:

[0037] Heat exchange plate 11, first insulation layer 12, sealing part 13, heat insulation layer 14, second insulation layer 15, temperature and humidity detection element 16, heating element 17, controller 18, frame 19, battery pack 20 and outer casing 21;

[0038] Inlet 111, outlet 112, heat exchange channel 113, guide plate 114, guide channel 115, first cold plate 116, second cold plate 117, first crossbeam 118, and second crossbeam 119;

[0039] First detection bit 121 and second detection bit 122;

[0040] First plug 131 and second plug 132;

[0041] First channel 1151 and second channel 1152;

[0042] Separator 151 and vacuum channel 152;

[0043] First border 191 and second border 192. Detailed Implementation

[0044] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0045] To enable those skilled in the art to better understand the present invention, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0046] This utility model discloses a battery pack, as shown in the attached figure. Figures 1 to 3As shown, the battery pack 20, heat exchange plate 11, first heat insulation layer 12, and heat insulation layer 14 are stacked sequentially. The battery pack 20 includes multiple stacked batteries. The heat exchange plate 11 has a top surface, a bottom surface, and multiple side surfaces. The top surface faces the battery pack 20, and the heat exchange plate 11 is in contact with the battery pack 20. The heat exchange plate 11 uses the internally circulating coolant to exchange heat with the battery pack 20, removing the heat generated by the battery pack 20, cooling the battery pack 20, preventing thermal runaway, extending the cycle life of the battery pack 20, and ensuring the safety of the battery pack 20. The heat exchange plate 11 is preferably a liquid-cooled plate, but the heat exchange method of the heat exchange plate 11 is not limited to liquid cooling. For example, it can also be other heat exchange methods such as air cooling, oil cooling, and solid-liquid multiphase cooling.

[0047] The bottom surface of the heat exchange plate 11 faces the first heat insulation layer 12, and multiple sides are adjacent to the top and bottom surfaces respectively and heat exchange channels 113 are formed inside the heat exchange plate 11. At least one side is provided with a sealing part 13 to close the heat exchange channels 113. The heat insulation layer 14 has a first heat insulation part and a second heat insulation part covering the first heat insulation layer 12. The second heat insulation part is located at the edge of the first heat insulation part and extends toward the direction close to the battery pack 20. The second heat insulation part covers the sealing part 13.

[0048] As a preferred embodiment, as shown in the appendix Figure 3 As shown, the first heat insulation layer 12 is stacked on the side of the heat exchange plate 11 away from the battery pack 20. The first heat insulation layer 12 is filled with a heat insulation medium or is in a vacuum state to reduce or even avoid heat exchange between the heat exchange plate 11 and the external environment. The heat exchange plate 11 and the first heat insulation layer 12 are an integral structure, manufactured using an integral molding process. Due to the manufacturing process, both ends of the heat exchange plate 11 and the first heat insulation layer 12 are open structures. There are two sealing parts 13, which are respectively plugged at both ends of the heat exchange plate 11 and the first heat insulation layer 12. That is, one end of the heat exchange plate 11 and the first heat insulation layer 12 shares a sealing part 13 for sealing, which simplifies the structure and makes assembly easier. To ensure the airtightness of the battery pack, the heat exchange plate 11 is welded to the two sealing parts 13, and the first heat insulation layer 12 is welded to the two sealing parts 13 to prevent leakage of liquid or gas.

[0049] As attached Figure 3 As shown, the insulation layer 14 is stacked on the side of the first insulation layer 12 away from the heat exchange plate 11, that is, the first insulation layer 12 is stacked between the heat exchange plate 11 and the insulation layer 14. The insulation layer 14 completely covers the first insulation layer 12 and the two sealing parts 13 provided at both ends, so that the insulation layer 14 can completely cover the bottom side of the first insulation layer 12, the two sealing parts 13, and the weld between the first insulation layer 12 and the two sealing parts 13, ensuring that the first insulation layer 12 is completely isolated from the external environment by the insulation layer 14.

[0050] Alternatively, the heat exchange plate 11 and / or the first insulation layer 12 may be an open structure on one side, or an open structure on three sides, or an open structure on all sides; wherein, a sealing part 13 is provided at the opening on each side to seal the heat exchange plate 11 and / or the first insulation layer 12.

[0051] This utility model optimizes the battery pack by adding a first heat insulation layer 12 and a heat preservation layer 14. The first heat insulation layer 12 is stacked between the heat exchange plate 11 and the heat preservation layer 14, and the heat preservation layer 14 completely covers the first heat insulation layer 12 and the sealing part 13 on its side. This effectively isolates the heat exchange plate 11 from the external environment, preventing the heat exchange plate 11 from being directly exposed to the external environment and reducing the impact of the external temperature on the heat exchange plate 11. Moreover, the two layers also work together to provide heat preservation, reducing the temperature difference between the heat exchange plate 11 and the external environment. This effectively reduces the occurrence of condensation at the sealing part 13, thereby reducing safety issues caused by condensation on the heat exchange plate 11 and improving the safety of the battery pack.

[0052] The top surface of the heat exchange plate 11 is provided with an inlet 111 and an outlet 112 that connect the heat exchange channel 113. The inlet 111 and the outlet 112 are located on the side of the top surface of the heat exchange plate 11 close to the sealing part 13, ensuring that the flow path of the heat exchange channel 113 is long enough to improve the heat exchange efficiency between the heat exchange channel 113 and the battery pack 20.

[0053] As a preferred embodiment, as shown in the appendix Figure 4 As shown, the sealing part 13 includes a first plug 131 fixed to the front end of the heat exchange plate 11. The heat exchange plate 11 has an inlet 111 and an outlet 112 at one end near the first plug 131. The heat exchange channel 113 is a serpentine channel, which improves heat exchange efficiency by extending the flow path. The two ends of the heat exchange channel 113 are connected to the inlet 111 and the outlet 112, respectively. After the low-temperature coolant flows into the heat exchange channel 113 through the inlet 111, it exchanges heat with the battery pack 20 in the heat exchange channel 113 and is heated up before flowing out through the outlet 112.

[0054] The insulation layer 14 extends to the side of the top surface where the water inlet 111 and the water outlet 112 are located. The insulation layer 14 covers part of the top surface of the heat exchange plate 11, reducing the contact area between the heat exchange plate 11 and the external environment, thereby reducing the influence of the external environment temperature on the heat exchange plate 11, achieving the purpose of heat preservation, effectively reducing the occurrence of condensation, and improving the safety of the battery pack.

[0055] The insulation layer 14 includes insulation cotton and / or an insulation coating. In a preferred embodiment, the insulation layer 14 consists of insulation cotton and an insulation coating applied to the surface of the insulation cotton, and the thickness of the insulation layer 14 ranges from 3 to 6 mm.

[0056] As a preferred embodiment, as shown in the appendix Figure 4 As shown, several parallel guide plates 114 are fixed inside the heat exchange plate 11. A guide channel 115 is formed between any two adjacent guide plates 114, and all guide channels 115 are connected end to end to form a heat exchange flow channel 113. All guide channels 115 include a first channel 1151 opposite to the first heat zone and a second channel 1152 opposite to the second heat zone. The first heat zone refers to the low heat zone of the battery pack 20, and the second heat zone refers to the high heat zone of the battery pack 20. The width of the first channel 1151 is smaller than the width of the second channel 1152. That is, the closer to the high heat zone of the battery pack 20, the wider the guide channel 115, the higher the heat exchange efficiency, and the more heat is removed; conversely, the closer to the low heat zone of the battery pack 20, the narrower the guide channel 115, the lower the heat exchange efficiency, and the less heat is removed. The distribution of all flow channels 115 is determined by the heat-generating location of the battery pack 20. All flow channels 115 are distributed non-equidistantly, which can reduce the temperature difference of the battery pack, ensure the temperature uniformity of the battery pack, and improve safety.

[0057] As a preferred embodiment, as shown in the appendix Figure 4 As shown, the height of the flow channel 115 ranges from 5 to 100 mm, the width of the first channel 1151 ranges from 5 to 90 mm, the width of the second channel 1152 ranges from 10 to 100 mm, and the length of the heat exchange channel 113 ranges from 1000 to 15000 mm, so that the temperature difference between the inlet 111 and the outlet 112 of the heat exchange plate 11 is <2.5℃, thereby reducing condensation caused by temperature differences at different positions of the heat exchange plate 11.

[0058] It should be noted that the above parameter ranges include the values ​​at both endpoints.

[0059] Alternatively, the height of the guide channel 115 can also be any value within the range of 10mm, 20mm, 30mm, 50mm, 70mm, 80mm, etc., which will not be elaborated further here; the width of the first channel 1151 can also be any value within the range of 10mm, 20mm, 30mm, 50mm, 70mm, 80mm, etc., which will not be elaborated further here; the width of the second channel 1152 can also be any value within the range of 10mm, 20mm, 30mm, 50mm, 70mm, 80mm, etc. Any value within this range will not be elaborated upon here; the length of the heat exchange channel 113 can also be any value within this range, such as 1100mm, 1200mm, 1300mm, 1500mm, 1700mm, 18000mm, 2000mm, 3000mm, 4000mm, 5000mm, 6000mm, 7000mm, 8000mm, 10000mm, 11000mm, 12000mm, 13000mm, 14000mm, etc., which will not be elaborated upon here.

[0060] As a preferred embodiment, as shown in the appendix Figure 4 As shown, a sealing part 13 is fixed on the same side of both the heat exchange plate 11 and the first insulation layer 12, so as to be covered by the insulation layer 14 to reduce the generation of condensate. The sealing part 13 is a plug welded to the side plate of the heat exchange plate 11, which makes assembly more convenient and improves the sealing performance of the battery pack.

[0061] As attached Figure 3 As shown, the battery pack also includes a second heat insulation layer 15, which is stacked between the heat exchange plate 11 and the first heat insulation layer 12. The second heat insulation layer 15 is vacuum-sealed. The second heat insulation layer 15, the first heat insulation layer 12, and the insulation layer 14 form a sandwich structure, adding three layers of heat insulation protection between the heat exchange plate 11 and the external environment. This ensures that the temperature difference between the heat exchange plate 11 and the external environment is reduced, lowering the risk of condensation on the heat exchange plate 11 and achieving the effect of completely eliminating condensate, thus ensuring the safety of the battery pack. Two sealing parts 13 are respectively installed at both ends of the second heat insulation layer 15. That is, one sealing part 13 is shared by the heat exchange plate 11, the second heat insulation layer 15, and the first heat insulation layer 12, making it easier to assemble the entire battery pack. The second heat insulation layer 15 is also connected to the two sealing parts 13 by welding.

[0062] As attached Figure 5 As shown, a plurality of parallel partition plates 151 are formed in the second heat insulation layer 15, and a vacuum cavity 152 is formed between any two adjacent partition plates 151, so that the second heat insulation layer 15 can not only increase the strength of the heat exchange plate 11, but also further increase the thermal resistance between the flow channel and the external environment.

[0063] In a preferred embodiment, all vacuum channels 152 are equidistantly distributed.

[0064] Optionally, the height of the vacuum channel 152 is in the range of 5-100mm, the width of the vacuum channel 152 is in the range of 5-100mm, and the total length of all vacuum channels 152 is in the range of 1000-15000mm, so that the second heat insulation layer 15 can both ensure the strength of the heat exchange plate 11 and play a role in preventing condensation.

[0065] It should be noted that the above parameter ranges include the values ​​at both endpoints.

[0066] Alternatively, the height of the vacuum channel 152 can also be any value within the range of 10mm, 20mm, 30mm, 50mm, 70mm, 80mm, etc., which will not be elaborated here; the width of the vacuum channel 152 can also be any value within the range of 10mm, 20mm, 30mm, 50mm, 70mm, 80mm, etc., which will not be elaborated here; the total length of all vacuum channels 152 can also be any value within the range of 1100mm, 1200mm, 1300mm, 1500mm, 1700mm, 18000mm, 2000mm, 3000mm, 4000mm, 5000mm, 6000mm, 7000mm, 8000mm, 10000mm, 11000mm, 12000mm, 13000mm, 14000mm, etc., which will not be elaborated here.

[0067] As attached Figure 6 As shown, the battery pack also includes a temperature and humidity sensor 16, a heating element 17, and a controller 18. The controller 18 is electrically connected to both the temperature and humidity sensor 16 and the heating element 17. The temperature and humidity sensor 16 is located within the first insulation layer 12, and each sensor 16 is used to detect the current temperature and humidity within the first insulation layer 12. The heating element 17 is located within the first insulation layer 12 and is used to heat the first insulation layer 12, preventing condensation due to excessive internal temperature differences. The number of heating elements 17 and temperature and humidity sensors 16 is not limited to one; all heating elements 17 are connected to all temperature and humidity sensors 16 in a one-to-one correspondence, ensuring that each detection area of ​​the first insulation layer 12 is equipped with one heating element 17 and one temperature and humidity sensor 16, thus reducing the temperature difference between different locations within the first insulation layer 12.

[0068] When the temperature and humidity sensor 16 detects that the current temperature and humidity within the first insulation layer 12 has reached the preset temperature and humidity, the sensor 16 sends a signal to the controller 18. After processing the signal, the controller 18 sends a signal to the heating element 17, automatically activating the heating element 17. The heating element 17 heats the area it is in, automatically adjusting the temperature at different locations within the first insulation layer 12 to ensure that the first insulation layer 12 remains dry and to prevent condensation from forming within it. The preset temperature and humidity mentioned in this document refers to the critical temperature and humidity at which condensation can form within the first insulation layer 12.

[0069] It should be noted that the controller 18 in this paper includes a signal receiving unit, a signal judging unit, and a signal transmitting unit. The signal receiving unit receives electrical signals sent by detection components such as the temperature and humidity detector 16. The signal judging unit is electrically connected to the signal receiving unit so that it can determine whether the signal received by the signal receiving unit is a trigger signal. The signal transmitting unit is electrically connected to the signal judging unit so that it can send the judgment signal generated by the signal judging unit to the execution component such as the heating element 17. The specific configuration of the signal receiving unit, signal judging unit, and signal transmitting unit can refer to the prior art; in this utility model, only the application scenario of the above three components has been changed, and no substantial improvement has been made. The controller 18 with this structure is widely used in existing automatic control equipment, such as MCUs, DSPs, or single-chip microcomputers. The key point of this utility model is that the controller 18 combines the temperature and humidity detector 16 and the heating element 17.

[0070] The first heat insulation layer 12 includes at least one set of first detection positions 121 and second detection positions 122 arranged opposite to each other, with each set of first detection positions 121 and second detection positions 122 respectively located close to the two sealing parts 13. The sealing part 13 includes a first plug 131 and a second plug 132. The first detection position is near the first plug 131, and the second detection position 122 is near the second plug 132. Considering that the first heat insulation layer 12 is first exposed to the humid and hot air in the external environment at the first plug 131 and the second plug 132, all the first detection positions 121 are located on the side of the first heat insulation layer 12 near the first plug 131 and are evenly distributed in a linear manner. All the second detection positions 122 are located on the side of the first heat insulation layer 12 near the second plug 132 and are evenly distributed in a linear manner. Each of the first detection position 121 and the second detection position 122 is provided with a temperature and humidity detection element 16 and a heating element 17, so that the heating element 17 first heats the front and rear ends of the first heat insulation layer 12 to avoid condensation on the first heat insulation layer 12 due to excessive temperature difference at different positions.

[0071] As attached Figure 6As shown, in a preferred embodiment, the first insulation layer 12 is provided with four temperature and humidity detection elements 16 and four heating elements 17. The first insulation layer 12 is provided with two first detection positions 121 on the side near the first plug 131. Each first detection position 121 is provided with a temperature and humidity detection element 16 and a heating element 17. The heating element 17 is located between the temperature and humidity detection element 16 and the sealing part 13. The first insulation layer 12 is provided with two second detection positions 122 on the side near the second plug 132. Each second detection position 122 is provided with a temperature and humidity detection element 16 and a heating element 17.

[0072] In a preferred embodiment, the heat exchange plate 11 includes a first cold plate 116 and a second cold plate 117 arranged side by side. One end of the first cold plate 116 and the second cold plate 117 are fixedly connected by a first crossbeam 118, and the other end of the two plates are fixedly connected by a second crossbeam 119. The first crossbeam 118 and the second crossbeam 119 are used to enhance the strength of the heat exchange plate 11. A first flow channel is formed in the first cold plate 116, and a second flow channel is provided in the second cold plate 117. The first flow channel and the second flow channel are connected to form a heat exchange flow channel 113, ensuring that the first cold plate 116 and the second cold plate 117 are compatible and interconnected. It should be noted that both the first plug 131 and the second plug 132 are provided with wire holes, so that the wires connecting the temperature and humidity detection element 16 and the heating element 17 to the controller 18 pass through the wire holes, avoiding incomplete sealing of the two sealing parts 13.

[0073] This utility model embodiment also discloses an energy storage system, as shown in the attached figure. Figure 1 and 2 As shown, the system includes a frame 19 and the aforementioned battery pack. The battery pack includes a housing 21, which covers the battery pack 20 and is fixedly connected to the frame 19 of the battery pack. This reduces the risk of condensation in the battery pack, improves the safety of the battery pack 20, and enhances the overall safety of the energy storage system.

[0074] As attached Figure 1 and 2As shown, the battery pack also includes a frame 19, which includes a first frame 191 and a second frame 192 disposed opposite to each other. The first frame 191 and the second frame 192 are integrally fixed to two opposite sides of the heat exchange plate 11, which can improve the strength of the heat exchange plate 11 and simplify the assembly process. As a preferred embodiment, the first frame 191, the first cold plate 116, the first side of the second heat insulation layer 15, and the first side of the first heat insulation layer 12 are all integrally connected, and the second frame 192, the second cold plate 117, the second layer of the second heat insulation layer 15, and the second layer of the first heat insulation layer 12 are all integrally connected. The heat exchange plate 11, the second heat insulation layer 15, the first heat insulation layer 12, and the insulation layer 14 are sequentially stacked between the first frame 191 and the second frame 192, which can improve the strength of the battery pack, isolate the external environment using the frame 19, and make the battery pack structure more compact.

[0075] It should be noted that in this specification, relational terms such as first and second are used only to distinguish one entity from several other entities, and do not necessarily require or imply any such actual relationship or order between these entities.

[0076] This article uses specific examples to illustrate the principles and implementation methods of this utility model. The descriptions of the above embodiments are only for the purpose of helping to understand the method and core ideas of this utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made to this utility model without departing from the principles of this utility model, and these improvements and modifications also fall within the protection scope of the claims of this utility model.

Claims

1. A battery pack, characterized in that, It includes a battery pack (20), a heat exchange plate (11), a first heat insulation layer (12) and a heat insulation layer (14) stacked in sequence. The heat exchange plate (11) has a top surface, a bottom surface and multiple side surfaces. The top surface faces the battery pack (20), the bottom surface faces the first heat insulation layer (12), and the multiple side surfaces are respectively adjacent to the top surface and the bottom surface and form heat exchange channels (113) inside the heat exchange plate (11). At least one side surface is provided with a sealing part (13) to close the heat exchange channels (113). The insulation layer (14) has a first insulation portion and a second insulation portion covering the first insulation layer (12), the second insulation portion being located at the edge of the first insulation portion and extending toward the battery pack (20), and the second insulation portion covering the sealing portion (13).

2. The battery pack according to claim 1, characterized in that, The top surface is provided with an inlet (111) and an outlet (112) that connect to the heat exchange channel (113). The inlet (111) and the outlet (112) are located on the side of the top surface near the sealing part (13).

3. The battery pack according to claim 2, characterized in that, The insulation layer (14) extends to the side of the top surface where the water inlet (111) and the water outlet (112) are located, and the insulation layer (14) covers part of the top surface.

4. The battery pack according to claim 2, characterized in that, The insulation layer (14) includes insulation cotton and / or insulation coating.

5. The battery pack according to any one of claims 1 to 4, characterized in that, A plurality of parallel guide plates (114) are fixed inside the heat exchange plate (11), and a guide channel (115) is formed between any two adjacent guide plates (114). All the guide channels (115) are connected end to end to form the heat exchange channel (113). All the guide channels (115) include a first channel (1151) opposite to the first heat zone and a second channel (1152) opposite to the second heat zone. The width of the first channel (1151) is smaller than the width of the second channel (1152). The height of the flow channel (115) ranges from 5 to 100 mm, the width of the first channel (1151) ranges from 5 to 90 mm, the width of the second channel (1152) ranges from 10 to 100 mm, and the length of the heat exchange channel (113) ranges from 1000 to 15000 mm.

6. The battery pack according to any one of claims 1 to 4, characterized in that, The sealing part (13) is fixed on the same side of both the heat exchange plate (11) and the first heat insulation layer (12).

7. The battery pack according to claim 6, characterized in that, The sealing part (13) is a plug welded to the side plate.

8. The battery pack according to any one of claims 1 to 4, characterized in that, It also includes a second heat insulation layer (15), which is stacked between the heat exchange plate (11) and the first heat insulation layer (12); two sealing parts (13) are respectively plugged at both ends of the second heat insulation layer (15); The second heat insulation layer (15) has a plurality of parallel partition plates (151) formed therein, and a vacuum cavity (152) is formed between any two adjacent partition plates (151). The height of the vacuum channel (152) ranges from 5 to 100 mm, the width of the vacuum channel (152) ranges from 5 to 100 mm, and the total length of all the vacuum channels (152) ranges from 1000 to 15000 mm.

9. The battery pack according to any one of claims 1 to 4, characterized in that, Also includes: Temperature and humidity detection element (16), wherein the temperature and humidity detection element (16) is disposed within the first heat insulation layer (12); Heating element (17), wherein the heating element (17) is disposed within the first heat insulation layer (12); The controller (18) is electrically connected to the temperature and humidity detection device (16) and the heating element (17) respectively. When the temperature and humidity detection device (16) detects that the current temperature and humidity in the first insulation layer (12) reaches the preset temperature and humidity, the controller (18) activates the heating element (17).

10. The battery pack according to claim 9, characterized in that, The first heat insulation layer (12) includes at least one set of first detection positions (121) and second detection positions (122) arranged opposite to each other, and each set of first detection positions (121) and second detection positions (122) is respectively arranged close to the two sealing parts (13); The first detection position (121) and the second detection position (122) are each provided with a temperature and humidity detection element (16) and a heating element (17), and the heating element (17) is located between the temperature and humidity detection element (16) and the sealing part (13).

11. The battery pack according to any one of claims 1 to 4, characterized in that, The heat exchange plate (11) includes a first cold plate (116) and a second cold plate (117) arranged side by side. One end of the first cold plate (116) and the second cold plate (117) are fixedly connected by the first crossbeam (118) and the other end of the two are fixedly connected by the second crossbeam (119); The first cold plate (116) has a first flow channel, and the second cold plate (117) has a second flow channel. The first flow channel and the second flow channel are connected to form the heat exchange flow channel (113).

12. An energy storage system, characterized in that, It includes a frame (19) and a battery pack according to any one of claims 1 to 11, the battery pack being arranged within the frame (19).

Images