A ring type liquid cooling pipe battery shell, battery and energy storage device

Abstract

The utility model discloses an encircle type liquid cooling pipeline battery case, battery and energy storage device, and the battery case includes inner shell and shell, wherein, the outer surface of inner shell is equipped with encircle type first liquid cooling track, the inner surface of shell is equipped with encircle type second liquid cooling track, the shell sets up in the outer side of inner shell, and the both form integral type closed casing, and the second liquid cooling track forms the closed encircle type liquid cooling pipeline with first liquid cooling track in the closed casing, the application adopts high -efficient, compact, low -cost liquid cooling structure design, and encircle type flow channel possesses low flow resistance, high turbulent flow heat transfer characteristic, and the performance is excellent in the homogenization, and through the integration design of encircle type liquid cooling channel structure and battery case, realizes the dual goal of high -efficient heat dissipation and light weight.

Description

Technical Field

[0001] This utility model relates to the field of batteries, and in particular to a surround-type liquid-cooled pipe battery casing, battery, and energy storage device. Background Technology

[0002] With the increasing demands for energy density, fast charging capability, and cycle life of lithium batteries from fields such as new energy vehicles, energy storage systems, and consumer electronics, battery thermal management technology has become a key challenge for the industry. Traditional liquid cooling solutions (such as cold plate type and serpentine tube type) have problems such as uneven heat exchange efficiency, complex structure, and large volume, making it difficult to meet the high-efficiency heat dissipation requirements of high-power batteries.

[0003] Currently, mainstream liquid cooling mainly uses the following two methods:

[0004] The first existing technology is the commonly used liquid cooling technology solution. The battery cells of this type of module do not have any heat dissipation device. They can only manage heat through surface contact. The battery cells are arranged in a certain way so that the bottom of the battery contacts a liquid cooling plate with built-in liquid cooling pipes. Through heat transfer, the heat generated by the battery cells during operation is transferred through the casing, the liquid cooling plate, and finally to the coolant to achieve the purpose of temperature control.

[0005] The second existing technology involves placing a liquid-cooled channel plate that conforms to the shape of the battery cell between adjacent battery cells. This is mostly used in power battery modules. The battery cell itself does not have any heat dissipation device and can only manage heat through surface contact. This type of module increases the contact area with the battery cell to a certain extent.

[0006] The current mainstream liquid cooling technology suffers from the following pain points:

[0007] 1. Low heat exchange efficiency: The uneven distribution of coolant flow in traditional liquid cooling channels (such as parallel flow channels) leads to excessively high local temperatures in the battery cell (temperature difference > 20℃), affecting battery life and safety.

[0008] 2. Structural redundancy: The design of separating the independent liquid cooling plate from the battery casing increases weight and volume, and reduces the energy density of the battery pack.

[0009] 3. High manufacturing cost: The assembly process of multiple components is complex and the sealing requirements are high, which increases production costs and the risk of failure. Utility Model Content

[0010] The purpose of this invention is to address the shortcomings of existing technologies by providing a surround-type liquid-cooled pipe battery casing, battery, and energy storage device. It adopts a highly efficient, compact, and low-cost liquid-cooling structure design. The surround-type flow channel has excellent performance in terms of temperature uniformity due to its low flow resistance and high turbulent heat transfer characteristics. By integrating the surround-type liquid-cooling channel structure with the battery casing, the dual goals of efficient heat dissipation and lightweight design are achieved, making it suitable for high-end application scenarios such as power batteries and energy storage batteries.

[0011] To achieve the above objectives, in a first aspect, this utility model provides a surround-type liquid-cooled pipe battery housing, the surround-type liquid-cooled pipe battery housing comprising an inner shell and an outer shell, wherein,

[0012] The outer surface of the inner shell is provided with a surrounding first liquid cooling track;

[0013] The inner surface of the outer casing is provided with a surrounding second liquid cooling track;

[0014] The outer shell is located outside the inner shell, and the two form an integral sealed shell. The second liquid cooling trajectory and the first liquid cooling trajectory form a sealed, surrounding liquid cooling pipeline within the sealed shell.

[0015] Preferably, the circumferential type includes a spiral type or a concentric ring type.

[0016] Preferably, the first and second liquid cooling tracks are locally densified in the high heat density region to form a variable pitch structure, thereby the liquid cooling pipeline is locally densified in the high heat density region and is a variable pitch structure.

[0017] Preferably, the cross-sectional area of ​​the first liquid cooling trajectory and the second liquid cooling trajectory increases in the high heat density region, forming a cross-sectional gradient structure, thereby increasing the cross-section of the liquid cooling pipeline in the high heat density region and forming a cross-sectional gradient structure.

[0018] More preferably, the inner surface of the first liquid cooling track is coated with a high thermal conductivity coating to increase the heat conduction energy in contact with the battery; the inner surface of the second liquid cooling track is coated with a drag-reducing coating to reduce the flow resistance of the liquid.

[0019] More preferably, the first liquid cooling trajectory is trapezoidal in shape; the second liquid cooling trajectory is rectangular in shape.

[0020] The trapezoidal groove of the first liquid cooling track is connected to the rectangular groove of the second liquid cooling track to form a liquid cooling pipeline. The ratio of the depth of the liquid cooling pipeline to the thickness of the battery casing is 3:1-5:1.

[0021] More preferably, the first liquid cooling trajectory and the second liquid cooling trajectory are spiral, and there are two of each, thus forming a double spiral liquid cooling pipeline.

[0022] Secondly, this application also provides a battery comprising the surrounding liquid-cooled pipe battery casing described in the first aspect, the battery including a core, two positive and negative current collectors, two positive and negative current collector plates, a surrounding liquid-cooled pipe battery casing, and two positive and negative electrode cover plate assemblies; wherein,

[0023] The two positive and negative current collectors are respectively disposed on both sides of the winding core;

[0024] The two positive and negative current collector plates are respectively disposed on the outside of the two positive and negative current collectors and fixed on both sides of the core to close the core.

[0025] The surrounding liquid-cooled pipe battery case is disposed on the outside of the core, and houses the core, two positive and negative current collectors, and two positive and negative current collector plates inside it. The coolant inside the surrounding liquid-cooled pipe battery case flows along the surface of the core to cool the core.

[0026] The two positive and negative electrode cover plate assemblies are respectively disposed on both sides of the surrounding liquid-cooled pipe battery case, thereby enclosing the surrounding liquid-cooled pipe battery case.

[0027] Preferably, the battery is square in shape with rounded corners at the edges, and has a length of 10mm-1000mm, a thickness of 1mm-200mm, and a width of 10mm-300mm.

[0028] Thirdly, this application also provides an energy storage device, which includes a battery with a surrounding liquid-cooled pipe battery case as described in the first aspect, or includes a battery as described in the second aspect; the energy storage device includes a battery pack or a battery module.

[0029] The present invention provides a surround-type liquid-cooled pipe battery casing, battery, and energy storage device, which has the following technical effects:

[0030] 1. High-efficiency uniform temperature heat dissipation: The surrounding flow channel increases the heat exchange area and optimizes the turbulence effect of the coolant, ensuring uniform temperature on the surface of the battery cell;

[0031] 2. Lightweight structure: Each cell has an independent liquid cooling channel, eliminating the need for a separate liquid cooling plate, increasing the energy density of the battery pack, and enhancing the structural strength of each cell.

[0032] 3. Low flow resistance design: Smooth and continuous flow channels reduce pressure loss, lower pump power consumption, and improve system energy efficiency;

[0033] 4. Low-cost manufacturing: The pressure diffusion welding process is used to achieve integrated molding of the flow channel and the shell, simplifying the production process. Attached Figure Description

[0034] Figure 1A schematic diagram of a surround-type liquid-cooled pipe battery casing structure provided for an embodiment of this utility model;

[0035] Figure 2 A schematic diagram of an inner shell structure provided for an embodiment of this utility model;

[0036] Figure 3 A schematic diagram of the outer shell structure provided for an embodiment of this utility model;

[0037] Figure 4 A schematic diagram of a cross-sectional structure of a surround-type liquid-cooled pipe battery casing provided for an embodiment of this utility model;

[0038] Figure 5 A partial enlarged schematic diagram (B) of the cross-sectional structure of a surround-type liquid-cooled pipe battery casing provided for an embodiment of this utility model;

[0039] Figure 6 A schematic diagram of a battery structure with a spiral liquid-cooled pipeline battery case provided for an embodiment of this utility model;

[0040] Figure 7 A schematic diagram of a battery explosion with a spiral liquid-cooled pipeline battery casing provided for an embodiment of this utility model;

[0041] Figure 8 A schematic diagram of a battery pack provided for an embodiment of this utility model;

[0042] In the diagram: 1. Battery casing; 11. Inner casing; 12. Outer casing; 13. Liquid cooling pipeline; 111. First liquid cooling trajectory; 112. High thermal conductivity coating; 121. Second liquid cooling trajectory;

[0043] 2. Core; 3. Positive and negative current collectors; 4. Positive and negative current collector plates; 5. Positive and negative cover plate assembly. Detailed Implementation

[0044] The technical solution of this utility model will be further described in detail below with reference to the accompanying drawings and embodiments.

[0045] The surrounding liquid-cooled pipe battery casing provided in this embodiment can be applied to electrochemical batteries, specifically primary batteries and secondary batteries. Primary batteries include zinc-manganese batteries, zinc-plated batteries, lithium iron batteries, etc., while secondary batteries include lithium-ion batteries, lithium metal batteries, sodium-ion batteries, aluminum-ion batteries, magnesium-ion batteries, etc., and are not limited to specific types. Furthermore, the battery in this application is not limited to liquid or solid-state batteries.

[0046] Figure 1 This is a schematic diagram of a surround-type liquid-cooled pipe battery casing structure provided by an embodiment of the present invention. Figure 2This is a schematic diagram of an inner shell structure provided in an embodiment of the present utility model. Figure 3 This is a schematic diagram of a shell structure provided for an embodiment of the present utility model. Figure 4 This is a schematic diagram of a cross-sectional structure of a surround-type liquid-cooled pipe battery casing provided in an embodiment of the present invention. Figure 5 This is a partial enlarged schematic diagram (B) of the cross-sectional structure of a surround-type liquid-cooled pipe battery casing provided in an embodiment of the present invention, combined with... Figures 1 to 5 As shown in the figure, the present invention provides a surround-type liquid-cooled pipe battery casing for cooling the battery core 2, including an inner shell 11 and an outer shell 12. The structure is described in detail below.

[0047] The inner shell 11 has a hollow structure and is used to house the battery core 2. The outer surface of the inner shell 11 has a spiral first liquid cooling track 111. Here, the first liquid cooling track 111 refers to the surrounding liquid cooling channel on the outer surface of the inner shell 11. Specifically, the first liquid cooling track 111 can be a groove channel surrounding the outer surface of the inner shell 11. It should be noted that the surrounding channel can increase the heat exchange area, optimize the turbulence effect of the coolant, and ensure uniform surface temperature of the battery core.

[0048] The outer casing 12 has an inner surface with a surrounding second liquid cooling track 121 adapted to the first liquid cooling track 111. Here, the second liquid cooling track 121 refers to a surrounding liquid cooling channel on the inner surface of the outer casing 12. Specifically, the second liquid cooling track 121 can be a grooved channel surrounding the inner surface of the outer casing 12, which can engage with the groove of the first liquid cooling track 111 to form a channel. The outer casing 12 is located outside the inner casing 11 and is used to cooperate with the inner casing 11, forming an integral sealed casing. Thus, the groove of the second liquid cooling track 121 and the groove of the first liquid cooling track 111 form a sealed surrounding liquid cooling pipe 13 channel within the sealed casing. In use, the surrounding liquid cooling pipe 13 of the battery casing 1 cools the core 2, increasing the contact area between the coolant and the battery casing 1 and enhancing the turbulence effect. The aforementioned surrounding type includes, but is not limited to, a spiral or concentric ring type; that is, the first liquid cooling track 111, the second liquid cooling track 121, and the liquid cooling pipe 13 can be spiral or concentric ring type.

[0049] It should be noted that those skilled in the art can select and set the shape of the cross-section of the first liquid cooling trajectory 111 and the second liquid cooling trajectory 121 as needed. In some preferred embodiments, the first liquid cooling trajectory 111 can be a spiral trajectory, and the trajectory shape can be trapezoidal. The trapezoidal design can effectively reduce the difficulty of processing and facilitate further surface treatment of the trajectory. The second liquid cooling trajectory 121 can be a spiral trajectory, and the trajectory shape can be rectangular. The rectangular design can effectively reduce the difficulty of processing and maximize the contact area between the liquid and the shell. The trapezoidal groove of the first liquid cooling trajectory 111 and the rectangular groove of the second liquid cooling trajectory 121 are connected to form a liquid cooling pipe 13. In other preferred embodiments, the cross-sectional shape of the liquid cooling pipe 13 includes, but is not limited to, trapezoidal, circular, square, rhomboid and other irregular shapes, and the ratio of the depth of the liquid cooling pipe 13 to the thickness of the battery shell 1 is 3:1-5:1.

[0050] This application also proposes an optimized liquid cooling pipeline scheme that can be based on the heat distribution of the battery, so that more flow channels can be distributed in the heat-concentrated areas, ensuring uniform distribution of coolant and avoiding uneven heat dissipation caused by insufficient local flow. In some preferred embodiments, in order to focus on cooling the high heat density areas of the battery, the first liquid cooling trajectory 111 and the second liquid cooling trajectory 121 are locally densified in the high heat density areas of the battery, thereby forming a variable pitch structure. Thus, the liquid cooling pipeline 13 is locally densified in the high heat density areas, forming a variable pitch structure. That is to say, the pitch is relatively smaller in the high heat density areas and larger in the low heat density areas. In some other preferred embodiments, this application also provides a method to increase the cross-sectional area of ​​the liquid cooling pipeline 13. The cross-sectional area can be changed by altering the shape of the liquid cooling trajectory cross-section, for example, gradually changing from a small rectangle to a large rectangle. Specifically, the cross-sectional area of ​​the first liquid cooling trajectory 111 and the second liquid cooling trajectory 121 increases in the high heat density region and decreases in the low heat density region, with a gradual transition between the two regions. Thus, the first liquid cooling trajectory 111 and the second liquid cooling trajectory 121 form a cross-sectional gradient structure. As a result, the cross-section of the liquid cooling pipeline 13 increases in the high heat density region and decreases in the low heat density region, forming a cross-sectional gradient structure for the liquid cooling pipeline 13.

[0051] In some preferred embodiments, a high thermal conductivity coating 112 is sprayed onto the inner surface of the first liquid cooling track 111 to increase the thermal conductivity energy in contact with the battery and improve the thermal conductivity rate. Specifically, a high thermal conductivity coating can be sprayed onto the surface of the inner shell 11 to improve the heat transfer coefficient and reduce the maximum temperature of the core by more than 30%. At the same time, a drag-reducing coating is plated onto the inner surface of the second liquid cooling track 121 to reduce the flow resistance of the liquid. Specifically, a diamond-like carbon coating can be sprayed onto the inner surface of the pipe to further effectively reduce the flow resistance, reduce the coolant flow resistance by 20-30%, reduce the power consumption of the water pump, and improve the system energy efficiency.

[0052] In some preferred embodiments, the first liquid cooling trajectory 111 and the second liquid cooling trajectory 121 are spiral, and there are two of each, thus forming a double-spiral liquid cooling pipeline 13. The double-spiral pipeline design can form convection of two pipelines inside the battery casing 1, further balancing the battery temperature difference caused by the temperature difference between the inlet and outlet.

[0053] In some preferred embodiments, the inner shell 11 and the outer shell 12 can be assembled by diffusion welding. The pressure diffusion welding process achieves integrated molding of the flow channel and the shell, with the liquid cooling pipe directly embedded in the battery shell 1. This simplifies the production process, eliminates the need for a separate liquid cooling plate, reduces the structural volume by more than 10%, increases the overall energy density of the battery pack, and improves its resistance to shock and vibration, making it suitable for harsh operating conditions such as the bumpy environment of electric vehicles. Furthermore, the inner shell 11 and the outer shell 12 can be made of lightweight, high-thermal-conductivity materials such as aluminum alloys or composite materials, balancing heat dissipation performance and cost control. Both the inner shell 11 and the outer shell 12 have relatively large radius angles, a design that facilitates the bends in the looped pipes, making the pipes smoother and effectively reducing liquid flow resistance.

[0054] The above is a structural description of a surround-type liquid-cooled pipe battery case 1 provided in this embodiment. This application also provides a battery using the above-mentioned surround-type liquid-cooled pipe battery case 1, and its structure will be described below.

[0055] Figure 6 This is a schematic diagram of a battery structure with a spiral liquid cooling pipeline 13 and a battery casing 1, provided by an embodiment of the present invention. Figure 7 This invention provides a schematic diagram of a battery explosion with a battery casing 1 featuring a spiral liquid cooling pipeline 13, as shown in the embodiment of the present invention. Figure 6 and Figure 7 As shown, the battery includes a surrounding liquid-cooled pipe battery casing 1, a core 2, two positive and negative current collectors 3, two positive and negative current collector plates 4, and two positive and negative cover plate assemblies 5.

[0056] Two positive and negative current collectors 3 are respectively disposed on both sides of the core 2.

[0057] Two positive and negative current collectors 4 are respectively disposed on the outside of the two positive and negative current collectors 3 and fixed on both sides of the core 2 to seal the core 2.

[0058] The surrounding liquid-cooled pipe battery case 1 is set on the outside of the core 2, wrapping the core 2 and housing the core 2, two positive and negative current collectors 3, and two positive and negative current collector plates 4 inside it. The coolant inside the surrounding liquid-cooled pipe battery case 1 flows evenly along the surface of the core 2 to cool the core 2, effectively controlling the temperature difference between the cores to ≤5℃, which can avoid local overheating of the core 2 and extend the battery cycle life by more than 20%.

[0059] Two positive and negative electrode cover plate assemblies 5 are respectively disposed on both sides of the surrounding liquid-cooled pipe battery case 1, which encloses the surrounding liquid-cooled pipe battery case 1.

[0060] In some preferred embodiments, the battery is square in shape with rounded corners at the edges. The battery is 10mm-1000mm long, 1mm-200mm thick, and 10mm-300mm wide.

[0061] To better understand this application, this application also provides a method for fabricating a battery using a conventional liquid cooling plate and the surrounding liquid cooling pipe battery case provided in this application, along with comparative results from multiple tests, as follows:

[0062] The positive electrode uses high-nickel ternary cathode material, with 95% active material content. The negative electrode uses silicon-carbon cathode material, with 93% active material content. A 20µm ion-conducting membrane with an ionic conductivity of 1.5 × 10⁻⁶ is used in between. -4 S / cm, after the dry cell is filled with in-situ cured electrolyte, it is integrally molded through in-situ curing. It is then matched with a traditional square, shell-less cooling casing and the surrounding liquid-cooled pipe battery casing of this technical solution, respectively, to assemble standard sample square batteries and the new technology square battery of this solution. Battery packs are formed in a 3-series, 5-parallel configuration. The traditional casing uses a traditional liquid-cooled plate for heat dissipation, while the spiral liquid-cooled pipe battery uses only its own heat dissipation. Tests were conducted at a 1C charge / discharge rate to evaluate heat transfer coefficient, temperature uniformity, volume fraction, thermal response time, and withstand voltage performance. The results of multiple tests are as follows:

[0063]

[0064]

[0065] The comparison results above show that, compared with the prior art, this application has a higher heat transfer coefficient, better temperature uniformity, smaller size, shorter thermal response time, and stronger pressure resistance.

[0066] Furthermore, this application also provides an energy storage device comprising the above-mentioned... Figures 1-5 The battery in the surrounding liquid-cooled pipe battery case, or containing the above-mentioned Figures 6-7 The battery in the context; here, the energy storage device includes, but is not limited to, a battery pack or battery module, which consists of multiple batteries with a surrounding liquid-cooled pipe battery casing, specifically as follows: Figure 8 As shown.

[0067] The present invention provides a surround-type liquid-cooled pipe battery casing, battery, and energy storage device, which has the following technical effects:

[0068] 1. High-efficiency uniform heat dissipation: The surrounding flow channel increases the heat exchange area, optimizes the turbulence effect of the coolant, and ensures uniform surface temperature of the core.

[0069] 2. Lightweight structure: Each cell has an independent liquid cooling channel, eliminating the need for a separate liquid cooling plate, increasing the energy density of the battery pack, and enhancing the structural strength of each cell.

[0070] 3. Low flow resistance design: Smooth and continuous flow channels reduce pressure loss, lower pump power consumption, and improve system energy efficiency;

[0071] 4. Low-cost manufacturing: The pressure diffusion welding process is used to achieve integrated molding of the flow channel and the shell, simplifying the production process.

[0072] In this utility model, the term "multiple" refers to two or more unless otherwise explicitly defined. The terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; "linking" can be a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0073] In the description of this utility model, it should be understood that the terms "upper", "lower", "left", "right", "front", "rear", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or unit referred to must have a specific orientation or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0074] In the description herein, the terms "a specific embodiment," "some embodiments," "one embodiment," etc., refer to a specific feature, structure, material, or characteristic described in connection with that embodiment or example, which is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0075] The specific embodiments described above further illustrate the purpose, technical solution, and beneficial effects of this utility model. It should be understood that the above description is only a specific embodiment of this utility model and is not intended to limit the scope of protection of this utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the scope of protection of this utility model.

Claims

1. A surround-type liquid-cooled pipe battery casing, characterized in that, The surrounding liquid-cooled pipe battery housing includes an inner shell and an outer shell, wherein, The outer surface of the inner shell is provided with a surrounding first liquid cooling track; The inner surface of the outer casing is provided with a surrounding second liquid cooling track; The outer shell is disposed outside the inner shell, and the two form an integral sealed shell. The second liquid cooling trajectory and the first liquid cooling trajectory form a sealed, encircling liquid cooling pipeline within the sealed shell.

2. The surrounding liquid-cooled pipe battery casing according to claim 1, characterized in that, The surrounding type includes spiral or concentric ring type.

3. The surrounding liquid-cooled pipe battery casing according to claim 1, characterized in that, The first and second liquid cooling tracks are locally densified in the high heat density region, forming a variable pitch structure. Thus, the liquid cooling pipeline is locally densified in the high heat density region, forming a variable pitch structure.

4. The surrounding liquid-cooled pipe battery casing according to claim 1, characterized in that, The first and second liquid cooling trajectories have increased cross-sectional areas in high heat density regions, thereby increasing the cross-section of the liquid cooling pipeline in high heat density regions and forming a gradually changing cross-section structure.

5. The surrounding liquid-cooled pipe battery casing according to any one of claims 1-4, characterized in that, The inner surface of the first liquid cooling track is coated with a high thermal conductivity coating to increase the heat conduction energy in contact with the battery; the inner surface of the second liquid cooling track is coated with a drag-reducing coating to reduce the flow resistance of the liquid.

6. The surrounding liquid-cooled pipe battery casing according to any one of claims 1-4, characterized in that, The first liquid cooling trajectory is trapezoidal in shape; the second liquid cooling trajectory is rectangular in shape. The trapezoidal groove of the first liquid cooling track is connected to the rectangular groove of the second liquid cooling track to form a liquid cooling pipeline. The ratio of the depth of the liquid cooling pipeline to the thickness of the battery casing is 3:1-5:

1.

7. The surrounding liquid-cooled pipe battery casing according to any one of claims 1-4, characterized in that, The first liquid cooling trajectory and the second liquid cooling trajectory are spiral, and there are two of each, thus forming a double spiral liquid cooling pipeline.

8. A battery comprising a surrounding liquid-cooled pipe battery casing as described in any one of claims 1-7, characterized in that, The battery includes a core, two positive and negative current collectors, two positive and negative busbars, a surrounding liquid-cooled pipe battery casing, and two positive and negative cover plate assemblies; wherein... The two positive and negative current collectors are respectively disposed on both sides of the winding core; The two positive and negative current collector plates are respectively disposed on the outside of the two positive and negative current collectors and fixed on both sides of the core to close the core. The surrounding liquid-cooled pipe battery case is disposed on the outside of the core, and houses the core, two positive and negative current collectors, and two positive and negative current collector plates inside it. The coolant inside the surrounding liquid-cooled pipe battery case flows along the surface of the core to cool the core. The two positive and negative electrode cover plate assemblies are respectively disposed on both sides of the surrounding liquid-cooled pipe battery case, thereby enclosing the surrounding liquid-cooled pipe battery case.

9. The battery according to claim 8, characterized in that, The battery is square in shape with rounded corners. The battery is 10mm-1000mm long, 1mm-200mm thick, and 10mm-300mm wide.

10. An energy storage device, characterized in that, The energy storage device comprises a battery with a surrounding liquid-cooled pipe battery casing as described in any one of claims 1-7, or a battery as described in any one of claims 8-9; the energy storage device includes a battery pack or a battery module.

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