A new energy power storage battery pack

Abstract

The present invention discloses a new energy power storage battery pack, which relates to the technical field of new energy batteries, including a battery shell, and also including: an upper top plate and a lower bottom plate installed in the battery shell, and an assembly space for arranging and distributing battery cells is formed between the upper top plate, the lower bottom plate and the battery shell, and adjacent battery cells and battery cells are separated from the inner wall of the battery shell by a heat-insulating sheet; a pressure relief valve for releasing internal pressure is provided on the top of each battery cell; a protective component is used to spray coolant on the pressure relief valve when the battery cell is thermally runaway, and the protective component is provided with multiple groups, and corresponds to the pressure relief valve one by one. The present invention opens the protective component in advance through the joint part, and radiates outward from the center of thermal runaway, so that each protective component is gradually opened, so as to further delay the joint reaction when the battery cell is thermally runaway, prolong the joint time of thermal runaway, and then prolong the combustion time point of the overall thermal runaway of the battery, so as to buy time for the evacuation of personnel.

Description

Technical Field

[0001] The present invention relates to the technical field of new energy batteries, and in particular to a new energy power storage battery pack. Background Art

[0002] New energy batteries are being used more and more widely in life and industry. For example, new energy vehicles equipped with batteries have been widely used. In addition, batteries are also being increasingly used in areas such as energy storage.

[0003] Whether in the field of new energy vehicles or energy storage, thermal runaway may occur in the battery pack during use. In Chinese patent CN117134032B, a battery and electrical equipment are disclosed. When thermal runaway occurs in the battery cell, the discharge sprayed from the battery cell pressure relief valve can break through the structural weak area of ​​the coolant pipe, so that the coolant can cool the thermally runaway battery cell (i.e., battery cell) in time, thereby achieving the purpose of delaying the joint reaction between battery cells.

[0004] Research has shown that combustion caused by thermal runaway of a battery cannot be extinguished, which means that the only way to prolong the battery fire and combustion time is to prolong the overall thermal runaway time in order to buy time for the evacuation of personnel. In the above patent, although the pressure relief valve of the single battery can be cooled, if protective measures are not deployed in advance for the remaining battery cells before thermal runaway, the remaining battery cells will be more difficult to protect after thermal runaway occurs, making the battery pack more difficult to control in the later stages of the overall thermal runaway. Summary of the invention

[0005] The object of the present invention is to provide a new energy power storage battery pack to solve at least one technical problem existing in the above-mentioned prior art.

[0006] To achieve the above object, the present invention provides the following technical solution: a new energy power storage battery pack, including a battery shell, and also including:

[0007] An upper top plate and a lower bottom plate are installed in the battery shell, and an assembly space for arranging and distributing battery cells is formed between the upper top plate, the lower bottom plate and the battery shell, and adjacent battery cells and the battery cells are separated from the inner wall of the battery shell by a heat insulating sheet;

[0008] A pressure relief valve for releasing internal pressure is provided on the top of each battery cell;

[0009] A protection component, used for spraying coolant on the pressure relief valve when the battery cell is thermally out of control, wherein the protection component is provided in multiple groups and corresponds to the pressure relief valve one by one;

[0010] The connecting part is arranged between each protection component. When one of the battery cells thermally runs away and the corresponding protection component is activated, the adjacent protection component will be activated in advance through the connecting part.

[0011] Preferably, the protection assembly includes a plurality of cooling pipes capable of independent liquid supply circulation, and the plurality of cooling pipes are respectively distributed in each heat insulation sheet;

[0012] It also includes a hollow cavity opened in the middle of the upper top plate, a water storage part is installed in the hollow cavity, and the water storage part can be plastically deformed under the action of water pressure, the position of the water storage part located directly above the pressure relief valve is set as a fitting part, the fitting part divides the water storage part into multiple groups of liquid storage cavities by internal fitting, and the upper layer of the fitting part is provided with a protrusion, and the lower layer is provided with a through hole, when the two layers are fitted to each other, the protrusion is embedded in the through hole and closes it, each group of cooling pipes is connected with each corresponding liquid storage cavity, and the liquid storage cavity is located at the water inlet position of the cooling pipe;

[0013] The upper top plate is provided with a hole penetrating the hollow cavity at the position corresponding to the pressure relief valve, and connecting pipes are installed in the upper and lower holes. The opposite ends of the two connecting pipes are both configured as bellows and are fixedly fitted to the outer wall of the fitting portion.

[0014] Preferably, an intermediate portion and an adhesion portion are provided between the fitting portion and the liquid storage cavity, and the interior of the intermediate portion is filled with an expansion material that expands when exposed to water, and the interior of the hollow cavity outside the adhesion portion is filled with an elastic member.

[0015] Preferably, the outer layer of the expansion material is wrapped by a water-soluble film.

[0016] Preferably, the connection between the adhesion part and the middle part and the connection between the adhesion part and the liquid storage cavity are both concave and made of hard material.

[0017] Preferably, a single group of cooling tubes consists of a cooling inner tube installed inside the insulation sheet and a cooling outer tube installed above the upper top plate and below the lower bottom plate, and the top end of the cooling inner tube and the bottom end of the cooling outer tube are both connected to the liquid storage cavity.

[0018] Preferably, the thermal insulation sheet comprises a silicone frame, the interior of the silicone frame is provided with vertically distributed ribs, and aerogel is embedded in the frame separated by the ribs, and the cooling inner tube located in the silicone frame is provided with branches in each rib.

[0019] Preferably, a sol is added to the coolant in the cooling tube.

[0020] Preferably, the adhesion portion at the adhesion portion position is set as a plane adhesion.

[0021] Preferably, the thickness of the inner wall of the water storage portion at the fitting portion is thinner than the thickness of the inner wall at the liquid storage cavity and the adhesion portion.

[0022] Compared with the prior art, the present invention has the following beneficial effects:

[0023] The present invention realizes early joint opening of the protection components through the joint parts, that is, only the first protection component is actively opened under the action of thermal runaway, and the other protection components are passively opened and radiate outward from the thermal runaway center, so that each protection component is gradually opened, and multiple protections are formed by using battery cells to further delay the joint reaction when the battery cells have thermal runaway, prolong the thermal runaway joint time, and then prolong the combustion time point of the thermal runaway of the entire battery, thereby buying time for the evacuation of personnel. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a partial stereogram of the battery shell, the separator and the upper top plate after being assembled according to the present invention;

[0025] Figure 2 A front cutaway perspective view of a battery case and its internal structure according to the present invention;

[0026] Figure 3 For the present invention Figure 2 A in the enlarged view;

[0027] Figure 4 For the present invention Figure 2 Cutaway stereograms and partial magnified diagrams from different viewing angles;

[0028] Figure 5 It is a partial enlarged schematic diagram of the adhesion part of the present invention in a stretched state;

[0029] Figure 6 is a schematic cross-sectional view of the heat-insulating sheet of the present invention;

[0030] Figure 7 It is a partial enlarged cross-sectional view of the bonding portion of the present invention.

[0031] In the figure: 1. battery shell; 2. partition; 3. upper top plate; 4. cooling outer tube; 5. cooling inner tube; 6. battery cell; 7. lower bottom plate; 8. thermal insulation sheet; 9. hollow cavity; 10. liquid storage cavity; 11. adhesion part; 12. elastic part; 13. middle part; 14. expansion material; 15. fitting part; 16. connecting tube; 17. water-soluble film; 18. pressure relief valve; 19. silicone frame; 20. aerogel; 21. ribs. DETAILED DESCRIPTION

[0032] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0033] See also Figures 1 to 7 The present invention provides a technical solution: a new energy power storage battery pack, including a battery shell 1, and also including:

[0034] An upper top plate 3 and a lower bottom plate 7 are installed in the battery shell 1, and an assembly space for arranging and distributing the battery cells 6 is formed between the upper top plate 3, the lower bottom plate 7 and the battery shell 1, and adjacent battery cells 6 and the battery cells 6 are separated from the inner wall of the battery shell 1 by a heat insulating sheet 8;

[0035] A pressure relief valve 18 is provided at the top of each battery cell 6 for releasing the internal pressure;

[0036] A protection component, which is used to spray coolant on the pressure relief valve 18 when the battery cell 6 is thermally out of control. There are multiple groups of protection components, which correspond to the pressure relief valves 18 one by one;

[0037] The connecting part is arranged between each protection component. When one of the battery cells 6 thermally runs away and the corresponding protection component is activated, the adjacent protection component will be activated in advance through the connecting part.

[0038] According to research, the combustion caused by thermal runaway of the battery cannot be extinguished, that is to say, the only way to prolong the battery fire and combustion time is to prolong the overall thermal runaway time, thereby buying time for the evacuation of personnel.

[0039] Investigations show that during the thermal runaway process, the thermal runaway cells can be roughly divided into three stages. In the first stage, the cells will heat up rapidly and bulge. In the second stage, the pressure relief valves of the cells will release the internal pressure and produce a chain reaction to the adjacent and surrounding cells. In the third stage, the cells will burn until they are completely burned out. During this process, the second and other cells will accelerate their thermal runaway time due to the high temperature environment created by the thermal runaway of the first cell. Therefore, the thermal runaway time of the remaining cells will be shorter than that of the first cell. Therefore, if the thermal runaway time of the remaining cells can be extended, the thermal runaway time of the entire battery can be extended, thereby buying more time for the evacuation of personnel.

[0040] In view of this, in the present embodiment, by setting a plurality of protection components, when one of the battery cells 6 is in thermal runaway, the corresponding protection component will be activated, and the coolant will be sprayed on the pressure relief valve 18 of the thermal runaway battery cell 6, and the heat at the pressure relief valve 18 will be taken away by the evaporation of the coolant, so as to cool the battery cell 6 in the first place;

[0041] In this process, due to the effect of the linkage between the various protection components, the adjacent protection components will be opened in advance, that is, the coolant will be sprayed on the pressure relief valve 18 in advance, and the battery cell 6 will be in a protective state in advance, so that the remaining or subsequent battery cells 6 can withstand the high temperature environment created by the thermal runaway of the first battery cell 6 for a longer time, thereby extending the time of the joint reaction, and then extending the combustion time point of the overall thermal runaway of the battery, buying time for the evacuation of personnel.

[0042] In this way, the protection components are opened in advance through the joint part, that is, only the first protection component is actively opened under the action of thermal runaway, and the remaining protection components are passively opened and radiate outward from the thermal runaway center, so that each protection component is gradually opened, and the battery cell 6 is used to form multiple protections to further delay the joint reaction when the battery cell is thermal runaway and extend the joint time of thermal runaway.

[0043] Moreover, it is worth mentioning that when the pressure relief valve 18 sprays emissions outward, due to the pressure inside the battery cell 6, the emissions will be sprayed at a very fast speed, and the protective component that is opened in advance can spray coolant to the pressure relief valve 18 in advance. This can also avoid the coolant being directly rushed out due to the excessively fast emission speed, thereby ensuring that the protective component can cool down the pressure relief valve 18 when the battery cell 6 thermally runs away.

[0044] In one of the more preferred embodiments, the protection assembly includes multiple groups of cooling pipes capable of independent liquid supply circulation, and the multiple groups of cooling pipes are respectively distributed in each insulation sheet 8;

[0045] It also includes a hollow cavity 9 opened in the middle of the upper top plate 3, a water storage part is installed in the hollow cavity 9, and the water storage part can be plastically deformed under the action of water pressure, and the position of the water storage part located directly above the pressure relief valve 18 is set as a fitting part 15, and the fitting part 15 is used to divide the water storage part into multiple groups of liquid storage cavities 10 by internal fitting, and the upper layer of the fitting part 15 is provided with a protrusion, and the lower layer is provided with a through hole. When the two layers are fitted to each other, the protrusion is embedded in the through hole and closes it, and each group of cooling pipes is connected with each corresponding liquid storage cavity 10, and the liquid storage cavity 10 is located at the water inlet position of the cooling pipe;

[0046] A hole penetrating the hollow cavity 9 is opened at the position of the upper top plate 3 corresponding to the pressure relief valve 18 , and connecting pipes 16 are installed in the upper and lower holes. The opposite ends of the two connecting pipes 16 are both configured as bellows and are fixed to the outer wall of the fitting portion 15 .

[0047] For details on protection components, see Figure 2-4 As shown, multiple groups of cooling pipes capable of independent liquid supply circulation can cool down the battery cell 6 under normal working conditions of the battery, and the flow of cooling water is circulated from top to bottom, so that the cooling water will first fill the liquid storage chamber 10 and then flow downward;

[0048] When the battery cell 6 experiences thermal runaway, the battery cell 6 expands after rapid temperature rise and squeezes the heat insulation sheet 8, thereby cutting off the cooling tube inside the battery cell 6. The liquid storage cavity 10 continues to be filled with liquid, which gradually increases the internal pressure, thereby causing the liquid storage cavity 10 to expand and deform under the action of water pressure. During the expansion process, the bonding part of the bonding part 15 is gradually stretched open, that is, the upper and lower layers are separated, and the liquid storage cavities 10 on both sides of the bonding part 15 are connected.

[0049] In this way, when the two layers of the bonding part 15 are separated from each other, the strength at this position is reduced. In this way, when the battery cell 6 enters the second stage of explosion, the mixture of gas, solid and liquid ejected at high speed from the pressure relief valve 18 can break the layered bonding part 15, and then the coolant in the liquid storage chambers 10 on both sides will be ejected from the bonding part 15 under the action of the internal pressure, cool down the pressure relief valve 18, and take away the temperature with the ejection of the discharge;

[0050] The two connecting pipes 16 are provided so that the ejected discharge can be discharged from above the upper top plate 3 , and the ejected discharge can be separated from the remaining battery cells 6 by the upper top plate 3 , thereby preventing the ejected discharge from directly affecting the surrounding battery cells 6 .

[0051] Moreover, since there are liquid storage chambers 10 on both sides of the pressure relief valve 18 of the battery cell 6, when the liquid storage chambers 10 on both sides of the pressure relief valve 18 expand and accumulate pressure, the fitting portion 15 between the two will be stretched open. At the same time, the fitting portion 15 adjacent to it will also be stretched open under the expansion of the liquid storage chamber 10, but it only starts to stretch from one side. In this way, when the adjacent fitting portions 15 are stretched open, the adjacent liquid storage chambers 10 are also connected and the pressure gradually increases. In this way, the liquid storage chambers 10 can be gradually connected by gradually stretching the fitting portions 15 from the inside to the outside, thereby achieving the effect of the joint portion, so that the adjacent fitting portions 15 can be separated in advance before the corresponding pressure relief valve 18 explodes, and the pressure relief valve 18 is sprayed with coolant in advance.

[0052] It is worth noting that when the upper and lower layers of the bonding portion 15 are separated, the through hole of the lower layer is opened, so that the coolant can be sprayed out from the through hole, which will reduce the pressure in the liquid storage chamber 10 to a certain extent. By setting the aperture size of the through hole, it is possible to spray the coolant to the pressure relief valve 18 in advance without significantly reducing the pressure in the liquid storage chamber 10, thereby ensuring that the subsequent bonding portions 15 can be stretched open.

[0053] In one of the more preferred embodiments, an intermediate portion 13 and an adhesion portion 11 are provided between the fitting portion 15 and the liquid storage chamber 10, and the interior of the intermediate portion 13 is filled with an expansion material 14, and the expansion material 14 can expand when exposed to water, and the hollow cavity 9 located outside the adhesion portion 11 is filled with an elastic member 12.

[0054] In a further embodiment, in order to ensure that the subsequent fitting portion 15 can be stretched open, the middle portion 13 and the adhesive portion 11 are arranged between the fitting portion 15 and the liquid storage chamber 10. Under normal conditions, the cavity in the middle portion 13 is in a closed state, such as Figure 3 As shown, when the pressure in the liquid storage chamber 10 increases and expands, the adhesion portion 11 will be opened first, so that the coolant will contact the expansion material 14 in the middle portion 13 and make it absorb water and expand. The expansion force can further assist the bonding portion 15 to open, as shown in FIG. Figure 5 As shown, to ensure the expansion of the fitting portion 15;

[0055] It is worth noting that in order to prevent the adhesion part 11 from automatically separating during normal use, an elastic member 12 can be filled in the hollow cavity 9 to support the adhesion part 11. The specific elastic member 12 can be made of rubber, silicone or thermal conductive cotton roller.

[0056] The outer layer of the expansion material 14 is wrapped by a water-soluble film 17 .

[0057] In a further embodiment, in order to prevent the expansion material 14 from being randomly scattered and to facilitate installation, the expansion material 14 is wrapped and fixed by a water-soluble film 17. The water-soluble film 17 can be made from a water-soluble PVA film, which will directly dissolve when encountering water, thereby exposing the expansion material 14 inside.

[0058] The connection between the adhesion part 11 and the middle part 13 and the connection between the adhesion part 11 and the liquid storage chamber 10 are both designed to be concave and are made of hard material.

[0059] In a further embodiment, in order to reduce the extension of the expansion material 14 toward the liquid storage chamber 10 when expanding, the expansion material 14 can be extended more toward the fitting portion 15 when expanding through the provision of a concave shape and a hard material, so as to increase the expansion effect on the fitting portion 15.

[0060] In one of the more preferred embodiments, a single group of cooling tubes consists of a cooling inner tube 5 installed inside the insulation sheet 8 and a cooling outer tube 4 installed above the upper top plate 3 and below the lower bottom plate 7, and the top end of the cooling inner tube 5 and the bottom end of the cooling outer tube 4 are both connected to the liquid storage chamber 10.

[0061] Cooling pipe can be seen Figure 1-2 Multiple groups of cooling tubes can be independently supplied and circulated without affecting each other, which will not affect the subsequent protection components. Moreover, the storage tank and reflux tank of the coolant in the cooling tube can be set to the same source, as long as the supply of each cooling tube does not conflict.

[0062] In one of the more preferred embodiments, the thermal insulation sheet 8 includes a silicone frame 19 , the interior of the silicone frame 19 is provided with vertically distributed ribs 21 , and the frame separated by the ribs 21 is embedded with aerogel 20 , and the cooling inner tube 5 located in the silicone frame 19 is provided with branches in each rib 21 .

[0063] Heat insulation sheet 8 can be found Figure 6 In order to further provide the cooling strength of liquid cooling, the heat exchange area can be increased by setting multiple branches, thereby improving the cooling effect under normal conditions.

[0064] In one of the more preferred embodiments, a sol is added to the coolant in the cooling tube.

[0065] As can be seen from the above content, the bonding part 15 is formed by bonding the upper and lower layers to each other, so adding a sol to the coolant can help dissolve the glue between the bonding parts 15, so that the bonding parts 15 can be better opened;

[0066] It is worth noting that in the present embodiment, the bonding portion 11 is preferably rigidly connected rather than glued, for example, a riveting connection can be used, which can ensure adhesion while being able to be detached under pressure.

[0067] In one of the more preferred embodiments, the adhesion portion at the adhesion portion 11 is configured as a planar adhesion.

[0068] In one of the more preferred embodiments, the thickness of the inner wall of the water storage portion at the fitting portion 15 is thinner than the thickness of the inner wall at the liquid storage cavity 10 and the adhesion portion 11 .

[0069] By reducing the thickness of the fitting portion 15, the fitting portion 15 can be broken through when the pressure relief valve 18 explodes, thereby preventing high-temperature and high-pressure gas from accumulating in the space outside the pressure relief valve 18, thereby ensuring rapid pressure release.

[0070] The standard parts used in this embodiment can be purchased directly from the market, and the non-standard structural components recorded in the specification and the drawings can also be directly processed according to the existing technical common sense. At the same time, the connection method of each component adopts the mature conventional means in the prior art, and the machinery, parts and equipment all adopt the conventional models in the prior art, so no specific description will be given here.

[0071] Although 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 appended claims and their equivalents.

Claims

1. A new energy power storage battery pack, comprising a battery shell (1), characterized in that: Also includes: An upper top plate (3) and a lower bottom plate (7) are installed in a battery shell (1), and an assembly space for arranging and distributing battery cells (6) is formed between the upper top plate (3), the lower bottom plate (7) and the battery shell (1), and adjacent battery cells (6) and battery cells (6) are separated from the inner wall of the battery shell (1) by a heat insulating sheet (8); A pressure relief valve (18) for releasing internal pressure is provided on the top of each battery cell (6); A protection component, used for spraying cooling liquid on the pressure relief valve (18) when the battery cell (6) is in thermal runaway, wherein a plurality of protection components are provided and correspond one to one with the pressure relief valves (18); A connecting part is arranged between each protection component, and when one of the battery cells (6) is thermally runaway and the corresponding protection component is activated, the adjacent protection component will be activated in advance through the connecting part; The protection assembly comprises a plurality of cooling pipes capable of independent liquid supply circulation, and the plurality of cooling pipes are respectively distributed in each heat insulation sheet (8); It also includes a hollow cavity (9) opened in the middle of the upper top plate (3), a water storage part is installed in the hollow cavity (9), and the water storage part can be plastically deformed under the action of water pressure, the water storage part is located directly above the pressure relief valve (18) and is set as a fitting part (15), the fitting part (15) divides the water storage part into a plurality of groups of liquid storage cavities (10) by means of internal fitting, and the upper layer of the fitting part (15) is provided with a protrusion, and the lower layer is provided with a through hole, when the two layers are fitted to each other, the protrusion is embedded in the through hole and closes it, each group of cooling pipes is connected with each corresponding liquid storage cavity (10), and the liquid storage cavity (10) is located at the water inlet position of the cooling pipe; The upper top plate (3) is provided with a hole penetrating the hollow cavity (9) at a position corresponding to the pressure relief valve (18), and connecting pipes (16) are installed in the upper and lower holes, and the opposite ends of the two connecting pipes (16) are both configured as bellows and are fixedly attached to the outer wall at the attachment portion (15); There are liquid storage chambers (10) on both sides of the pressure relief valve (18). When the liquid storage chambers (10) on both sides of the pressure relief valve (18) expand and accumulate pressure, the fitting portion (15) between the liquid storage chambers (10) on both sides will be stretched open, and the fitting portion (15) adjacent to it will also be stretched open from one side under the expansion effect of the liquid storage chamber (10). When the adjacent fitting portions (15) are stretched open, the adjacent liquid storage chambers (10) are also connected and the pressure is gradually increased. By gradually stretching the fitting portions (15) from the inside to the outside, the liquid storage chambers (10) are gradually connected, so that the adjacent fitting portions (15) can be separated in advance before the corresponding pressure relief valve (18) explodes, and the pressure relief valve (18) is sprayed with coolant in advance, thereby achieving the effect of the joint portion.

2. The new energy power storage battery pack according to claim 1, characterized in that: An intermediate portion (13) and an adhesive portion (11) are provided between the fitting portion (15) and the liquid storage cavity (10), and the interior of the intermediate portion (13) is filled with an expansion material (14), and the expansion material (14) is capable of expanding when exposed to water, and the interior of the hollow cavity (9) located outside the adhesive portion (11) is filled with an elastic member (12).

3. The new energy power storage battery pack according to claim 2, characterized in that: The outer layer of the expansion material (14) is wrapped by a water-soluble film (17).

4. The new energy power storage battery pack according to claim 2, characterized in that: The connection between the adhesion part (11) and the middle part (13) and the connection between the adhesion part (11) and the liquid storage chamber (10) are both designed to be concave and are made of hard material.

5. The new energy power storage battery pack according to claim 1, characterized in that: A single group of cooling tubes is composed of a cooling inner tube (5) installed inside the heat insulating sheet (8) and a cooling outer tube (4) installed above the upper top plate (3) and below the lower bottom plate (7), and the top end of the cooling inner tube (5) and the bottom end of the cooling outer tube (4) are both connected to the liquid storage chamber (10).

6. The new energy power storage battery pack according to claim 5, characterized in that: The heat insulating sheet (8) comprises a silicone frame (19), the interior of the silicone frame (19) is provided with vertically distributed ribs (21), and the frames separated by the ribs (21) are embedded with aerogel (20), and the cooling inner tube (5) located in the silicone frame (19) is provided with branches in each rib (21).

7. The new energy power storage battery pack according to any one of claims 1 to 6, characterized in that: The cooling liquid in the cooling tube is added with a sol.

8. The new energy power storage battery pack according to claim 2, characterized in that: The adhesion portion at the adhesion portion (11) is configured as a plane adhesion.

9. The new energy power storage battery pack according to any one of claims 1 to 6, characterized in that: The thickness of the inner wall of the water storage portion at the fitting portion (15) is thinner than the thickness of the inner wall at the liquid storage cavity (10) and the adhesion portion (11).

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