Cooling shell, battery pack and power utilization system

Abstract

The utility model provides a cooling shell, a battery pack and a power utilization system. The cooling shell comprises an exhaust cavity and a cooling cavity, the exhaust cavity is used for containing thermal runaway gas, and the cooling cavity is used for containing a cooling medium so as to cool the thermal runaway gas in the exhaust cavity. The battery pack comprises the cooling shell and further comprises a battery cell, and the battery cell is placed in the cooling shell. The power utilization system comprises the battery pack. The cooling housing exhaust chamber is used to hold thermal runaway gases, which may be high temperature gases or liquids discharged from the device. The cooling cavity is used for containing cooling media, and the cooling media can absorb and take away heat in the exhaust cavity. By means of the cooling shell, the temperature in the exhaust cavity can be effectively reduced, and therefore equipment is protected against high-temperature damage.

Description

Technical Field

[0001] This utility model belongs to the field of battery systems, and in particular relates to a cooling shell, a battery pack and an electrical system. Background Technology

[0002] When the heat generated by thermal runaway cannot be effectively dissipated, the heat from one module cell can spread to another module cell, which to some extent increases the uncontrollability of thermal runaway and causes heat propagation. Utility Model Content

[0003] The purpose of this invention is to provide a cooling housing, a battery pack, and an electrical system to at least partially solve the problems existing in the related technologies.

[0004] To achieve the above objectives, the present invention adopts the following technical solution:

[0005] This utility model provides a cooling housing, which includes an exhaust chamber and a cooling chamber. The exhaust chamber is used to contain thermal runaway gas, and the cooling chamber is used to contain a cooling medium to cool the thermal runaway gas in the exhaust chamber. The cooling housing includes a cooling plate with a cavity, which separates the exhaust chamber and the cooling chamber. The exhaust chamber and the cooling chamber are not in communication. The exhaust chamber is suitable for placement near the thermal runaway gas, and the cooling chamber is suitable for placement away from the thermal runaway gas.

[0006] This utility model provides a cooling housing, wherein the exhaust chamber is provided with an air inlet, and the air inlet is located close to the thermal runaway gas.

[0007] This utility model provides a cooling housing, wherein the cooling cavity is disposed over the exhaust cavity.

[0008] In one embodiment of this utility model, the cooling housing includes a sidewall, the sidewall including a sidewall cavity for containing a cooling medium.

[0009] In one embodiment of this utility model, the sidewall includes an inlet and an outlet, the inlet being connected to the sidewall cavity, and the outlet being connected to the sidewall cavity.

[0010] In one embodiment of this utility model, the water inlet and the water outlet are located on the same side of the side wall, and along the direction of gravity, the water inlet is located above the water outlet.

[0011] In one embodiment of this utility model, the sidewall includes a first cavity and a second cavity. Along the direction of gravity, the first cavity is located above the second cavity. The sidewall includes an outlet that connects the first cavity and the second cavity.

[0012] In one embodiment of this utility model, the flow outlet is located on the side away from the water outlet.

[0013] This utility model also provides a battery pack, which includes the above-mentioned cooling housing and battery cells, the battery cells being placed inside the cooling housing.

[0014] In one embodiment of this utility model, the exhaust chamber has a through hole, which is used for the gas generated by the thermal runaway of the battery cell to enter the exhaust chamber.

[0015] In one embodiment of this utility model, along the first direction, the height of the sidewall is h1, and the height of the battery cell is h2. h1 and h2 satisfy: 1 / 2h2≤h1≤2 / 3h2, and the first direction is the direction in which the sidewall extends.

[0016] In one embodiment of this utility model, the battery pack includes an adhesive for connecting the battery cell and the cooling housing. The outer surface area of ​​the battery cell is S1, and the contact area between the battery cell and the adhesive is S2. S1 and S2 satisfy: 0.5S1≤S2≤0.7S1.

[0017] In one embodiment of this utility model, the battery pack includes an intelligent control cooling pipeline, which controls the cooling medium and / or detects the internal environment of the battery pack.

[0018] This utility model also provides an electrical system, which includes the aforementioned battery pack.

[0019] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0020] The cooling housing's exhaust chamber is used to contain thermal runaway gases, which may be high-temperature gases or liquids discharged from the equipment. The cooling chamber, in turn, contains a cooling medium that absorbs and removes heat from the exhaust chamber. This cooling housing effectively reduces the temperature within the exhaust chamber, thus protecting the equipment from high-temperature damage. Because the equipment is effectively cooled, it can maintain a higher operating temperature and a more stable operating state, thereby improving equipment performance. This cooling housing design can adapt to different cooling media and operating environments, exhibiting strong versatility and adaptability.

[0021] The above description is only an overview of the technical solution of this utility model. In order to better understand the technical means of this utility model, it can be implemented according to the contents of the specification. In order to make the above and other objects, features and advantages of this utility model more obvious and understandable, the following are preferred embodiments, and are described in detail with reference to the accompanying drawings. Attached Figure Description

[0022] The accompanying drawings, which form part of this specification, are used to provide a further understanding of this utility model. The illustrative embodiments of this utility model and their descriptions are used to explain this utility model and do not constitute an improper limitation of this utility model.

[0023] Figure 1 This is a schematic diagram of the cooling housing according to an embodiment of the present utility model;

[0024] Figure 2 This is a top view of the cooling housing according to an embodiment of the present utility model;

[0025] Figure 3 This is a schematic diagram of a battery pack according to an embodiment of the present utility model;

[0026] Figure label:

[0027] 10: Cooling housing; 11: Battery cell;

[0028] 12: Top cover; 13: Intelligent control cooling piping;

[0029] 14: Gap;

[0030] 100: Exhaust chamber; 101: Cooling chamber;

[0031] 102: Side wall;

[0032] 1021: Outlet; 1022: Inlet;

[0033] 1023: First cavity; 1024: Second cavity;

[0034] 1025: Outlet; Detailed Implementation

[0035] To make the technical problem solved by this utility model, the technical solution adopted, and the technical effect achieved clearer, the technical solution of this utility model will be further described below with reference to the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described herein are merely for explaining this utility model and not for limiting it. Furthermore, it should be noted that, for ease of description, only the parts related to this utility model are shown in the accompanying drawings, not all of them.

[0036] In the description of this utility model, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0037] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0038] In the description of this embodiment, the terms "upper", "lower", "right", etc., are based on the orientation or positional relationship shown in the drawings and are only for the convenience of description and simplification of operation. They are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0039] The terms "first," "second," etc., used in the specification and claims of this utility model are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence.

[0040] In this paper, the first direction D1 is the same as the sidewall extension direction.

[0041] like Figure 1As shown, a specific embodiment of this utility model provides a cooling housing, which includes an exhaust chamber and a cooling chamber. The exhaust chamber is used to contain thermal runaway gas, and the cooling chamber is used to contain a cooling medium to cool the thermal runaway gas within the exhaust chamber. The exhaust chamber of the cooling housing contains thermal runaway gas, which may be high-temperature gas or liquid discharged from the equipment. The cooling chamber contains a cooling medium that can absorb and remove heat from the exhaust chamber. This cooling housing effectively reduces the temperature within the exhaust chamber, thereby protecting the equipment from high-temperature damage. Because the equipment is effectively cooled, it can maintain a higher operating temperature and a more stable operating state, thus improving equipment performance. This cooling housing design can adapt to different cooling media and operating environments, exhibiting strong versatility and adaptability. In a specific embodiment of this utility model, the cooling medium in the cooling chamber can be injected externally or stored in a sealed container.

[0042] like Figure 1 As shown, in a specific embodiment of this utility model, the cooling shell includes a sidewall, which includes a sidewall cavity for accommodating a cooling medium. The sidewall design increases the contact area of ​​the cooling medium, enabling it to absorb heat more effectively, thereby improving the overall efficiency of the cooling shell. As a heat conduction medium, the sidewall cavity allows the cooling medium to be distributed more evenly within the sidewall. This allows heat to be conducted more uniformly through the sidewall, reducing problems caused by uneven heat distribution and improving the cooling effect. Furthermore, the sidewall design not only accommodates the cooling medium but also enhances the structural strength of the entire cooling shell. This helps resist external pressure, vibration, and impact, ensuring the stability and durability of the cooling shell. In some specific embodiments, the design of the sidewall cavity can be adjusted and optimized according to specific application requirements. For example, the size, shape, and number of the sidewall cavities can be adjusted to adapt to different cooling needs and working environments. This flexibility allows the cooling shell to better adapt to various application scenarios. In a specific embodiment of this utility model, the exhaust cavity and cooling cavity are used to cool the hot gas discharged from the cell explosion-proof valve during thermal runaway, while the sidewall and sidewall cavity further enhance the cooling effect. When hot gases are expelled, the cooling medium in the sidewall cavity can quickly absorb and remove heat, helping to prevent further deterioration of thermal runaway and ensuring the safety of the cell and the entire system. Furthermore, the sidewall can also regulate the cell's operating temperature. When the cell's operating environment becomes too hot, the cooling medium injected into the sidewall cavity absorbs heat, keeping the cell's temperature within a suitable range and preventing excessively high or low temperatures from adversely affecting cell performance. Simultaneously, the sidewall design also considers the uniformity of temperature distribution, ensuring consistent temperature across all parts of the cell and improving overall cell performance.

[0043] In one specific embodiment of this utility model, the sidewall includes an inlet and an outlet. The inlet and outlet are connected to the sidewall cavity. The inlet is for the cooling medium to enter, and the outlet is for the cooling medium to exit. The design of the inlet and outlet allows the cooling medium to smoothly enter the sidewall cavity, undergo heat exchange, and then exit from the outlet, achieving a circulating flow of the cooling medium. This circulating flow ensures that the cooling medium can continuously absorb and remove heat, maintaining the continuous cooling effect. In another specific embodiment of this utility model, the inlet and outlet are connected to an intelligent control cooling pipeline. The intelligent control cooling pipeline detects the internal environment of the battery pack, and when the internal temperature is too high, it injects cooling medium to cool the battery cells. Through the inlet and outlet, parameters such as the flow rate, temperature, and velocity of the cooling medium can be easily controlled and adjusted. This helps to adjust the cooling effect according to actual needs to achieve the best cooling effect. In other specific embodiments, the design of the inlet and outlet can also consider adding accessories such as filters and valves to enhance the reliability and safety of the system. For example, a filter can be installed at the inlet to prevent impurities from entering the side wall cavity; a valve can be installed at the outlet to facilitate control of the cooling medium flow. Furthermore, by rationally designing the position and size of the inlet and outlet, the flow path and velocity of the cooling medium can be optimized, thereby improving cooling efficiency.

[0044] Furthermore, in a specific embodiment of this utility model, the inlet and outlet are located on the same side of the sidewall, along the direction of gravity, with the inlet positioned above the outlet. The inlet and outlet being on the same side of the sidewall optimizes the flow path of the cooling medium within the sidewall cavity. After entering the sidewall cavity from the inlet, the cooling medium can flow more fully through the area requiring cooling and finally exit from the outlet. This design also makes the distribution of the cooling medium within the sidewall cavity more uniform. The cooling medium can more evenly cover the battery cell or components requiring cooling, thereby ensuring a more consistent and stable temperature for the battery cell or components. This uniform cooling helps prevent localized overheating or insufficient cooling, improving the overall cooling effect. Because the inlet is located above, the cooling medium can flow fully and exit within the sidewall cavity, reducing medium retention within the cavity, which helps maintain the cleanliness and efficient operation of the cooling system. In one specific embodiment of this utility model, the inlet is located above the outlet along the direction of gravity, and the cooling medium flows from top to bottom in the side wall cavity by gravity, which simplifies the structure of the cooling system and effectively reduces the pressure drop between the inlet and outlet, thereby reducing the energy consumption of the system operation.

[0045] like Figure 1As shown, in a specific embodiment of this utility model, the sidewall includes a first cavity and a second cavity. Along the direction of gravity, the first cavity is positioned above the second cavity. The sidewall includes an outlet connecting the first cavity and the second cavity. When the cooling medium enters the sidewall cavity, it first flows into the first cavity, uniformly filling it, and then flows into the second cavity through the outlet. This achieves effective cooling over a large area, significantly increasing the contact area of ​​the cooling medium and improving cooling efficiency. Furthermore, this design effectively reduces the risk of system overheating and decreases the area of ​​the cooling dead zone by optimizing the flow path and distribution of the cooling medium. This not only reduces system maintenance costs but also improves overall operational reliability.

[0046] Furthermore, such as Figure 2 As shown, in a specific embodiment of this utility model, the inlet is located on the side away from the outlet. By positioning the inlet away from the outlet, the cooling medium can be more fully distributed and flow within the first cavity before entering the second cavity, ensuring sufficient heat exchange with the battery cells or components inside the first cavity. Subsequently, the cooling medium flows into the second cavity through the inlet, further cooling the battery cells or components within the second cavity. This design helps ensure uniform distribution and efficient flow of the cooling medium throughout the entire sidewall. Due to the inlet's position, the cooling medium can better utilize gravity to flow naturally between the first and second cavities. This natural convection helps enhance the cooling effect and improve cooling efficiency. Simultaneously, the inlet design also helps reduce the resistance and pressure drop of the cooling medium during flow, further reducing energy consumption. This design reduces the number of pipes and connectors, lowering system complexity and potential failure points. The simplified structure not only helps reduce manufacturing costs but also improves system reliability and maintainability. The inlet design makes the cooling system more flexible, adaptable to different scenarios and needs. Depending on actual requirements, the flow path and distribution of the cooling medium can be optimized by adjusting the position and size of the inlet to meet specific cooling requirements.

[0047] like Figure 2As shown, a specific embodiment of this utility model also includes a battery pack, comprising the aforementioned cooling housing and battery cells, which are placed inside the cooling housing. When the battery pack is operating, if the temperature inside the battery pack is too high, a cooling medium enters the first cavity of the cooling housing through the inlet. Since the inlet is located above the outlet, the cooling medium flows naturally down under gravity, passing through the first cavity and exchanging heat with the battery cells therein. During this process, the cooling medium absorbs the heat generated by the battery cells, thereby reducing the temperature of the battery cells. Subsequently, the cooling medium enters the second cavity through the outlet. Since the outlet is located on the side away from the outlet, this ensures that the cooling medium is also evenly distributed in the second cavity and makes full contact with the battery cells in the second cavity for further heat exchange. The cooling medium, having absorbed heat, is discharged from the cooling housing through the outlet, completing one cooling cycle. During this process, the cooling system continuously removes the heat generated by the battery cells, thereby maintaining the temperature of the battery cells within a safe range. When a battery cell experiences thermal runaway, the cell's explosion-proof valve releases a large amount of hot gas. The exhaust chamber provides a safe outlet for these gases, preventing excessive pressure inside the battery pack from causing an explosion or other serious consequences. It also prevents harmful substances from the cell from being directly released into the external environment, protecting personnel and the environment. When the hot gas enters the exhaust chamber, the cooling medium (such as coolant) within the cooling chamber rapidly absorbs this heat, significantly reducing the temperature of the cell and its surrounding environment, thereby slowing or preventing the further spread of thermal runaway.

[0048] In one specific embodiment of this utility model, the exhaust chamber has a through hole, which is used for the gas generated by the thermal runaway of the battery cell to enter the exhaust chamber. The through hole guides the gas to discharge along a specific path, avoiding direct impact of the gas on other parts of the battery pack, reducing the risk of secondary damage, and also ensuring that the gas generated during the thermal runaway of the battery cell can quickly and effectively enter the exhaust chamber. This helps to quickly reduce the internal pressure of the battery pack and prevent safety problems caused by pressure accumulation. The form of the through hole is not unique. In this specific embodiment of the utility model, the through hole is a circular through hole with simple manufacturing process and low cost. In other specific embodiments, the through hole can also be a square through hole or a fan-shaped through hole.

[0049] In a specific embodiment of this utility model, along a first direction, the sidewall height is h1, and the cell height is h2, where h1 and h2 satisfy: 1 / 2h2 ≤ h1 ≤ 2 / 3h2, and the first direction is the direction in which the sidewall extends. When the cell height is too high, the heat at the top of the cell may not be effectively cooled, resulting in uneven temperature distribution and excessively high temperature at the top, affecting battery performance and lifespan. On the other hand, if the cell height is too low, the space occupied by the cell is relatively small relative to the sidewall height. In this case, there will be a large amount of unused space within the sidewall, which not only wastes space in the cooling housing but may also affect the flow distribution of the cooling medium. When the cell height and sidewall height satisfy 1 / 2h2 ≤ h1 ≤ 2 / 3h2, the flow of the cooling medium within the sidewall can more effectively cover the cell surface, achieving more uniform cooling. This helps reduce the temperature gradient of the cell, improves the overall performance of the battery pack, and also ensures that the cell has sufficient support within the sidewall, reducing the risk of cell displacement or damage due to vibration or impact.

[0050] In one specific embodiment of this utility model, the battery pack includes an adhesive for connecting the battery cells and the cooling housing. The outer surface area of ​​the battery cell is S1, and the contact area between the battery cell and the adhesive is S2. S1 and S2 satisfy: 0.5S1≤S2≤0.7S1. When the contact area S2 between the battery cell and the adhesive is between 50% and 70% of the outer surface area S1 of the battery cell, the adhesive can fully cover the surface of the battery cell, forming a firm connection. This design ensures a stable connection between the battery cell and the cooling housing, preventing loosening or separation that may occur during battery pack operation, thereby improving the overall structural stability and safety of the battery pack. Secondly, the larger contact area S2 facilitates heat transfer between the battery cell and the cooling housing. The adhesive not only acts as a connector but also serves as a medium for heat transfer. When the battery cell generates heat, the close contact between the adhesive and the cooling housing allows the heat to be transferred more effectively to the cooling housing, and then dissipated through the cooling system. This design improves the heat dissipation performance of the battery pack, helps reduce the battery cell temperature, and extends battery life. Furthermore, controlling the contact area between the battery cell and the binder within a reasonable range is also beneficial for optimizing material usage. Excessive binder can lead to material waste and increased costs, while insufficient binder may affect the connection effect and heat transfer. Therefore, by rationally designing the ratio of S1 to S2, efficient material utilization can be achieved while ensuring connection strength and heat transfer performance.

[0051] In one specific embodiment of this utility model, the battery pack includes an intelligent control cooling pipeline, which controls the cooling medium and / or detects the internal environment of the battery pack. The intelligent control cooling pipeline is integrated into the battery pack's cooling system and connected to components such as a cooling medium circulation pump, temperature sensors, and flow sensors. These sensors can detect information such as the battery pack's temperature, the flow rate and direction of the cooling medium in real time, and feed this information back to the control system. The control system then adjusts parameters such as the flow rate, speed, and temperature of the cooling medium based on the feedback information to achieve intelligent control of the cooling process. Furthermore, the intelligent control cooling pipeline may also be equipped with valves, distributors, and other components for precisely adjusting the flow path and distribution ratio of the cooling medium. These components can automatically adjust the cooling strategy according to the real-time status and operating requirements of the battery pack, ensuring that the battery cells receive uniform and efficient cooling. In one specific embodiment of this utility model, the intelligent control cooling pipeline is connected to the inlet and outlet of the water supply to control the cooling medium within the side wall cavity. The intelligent control cooling pipeline can also selectively connect to the cooling chamber; when uncontrolled hot gas enters the exhaust chamber, the intelligent control cooling pipeline injects cooling medium into the cooling chamber. The precise adjustment of the intelligent control cooling pipeline allows the cooling medium to be distributed more evenly to every corner of the battery pack, avoiding the problem of some areas overheating while others are undercooled. This not only improves the heat dissipation performance of the battery pack but also extends the lifespan of the battery cells. Furthermore, the intelligent control cooling pipeline can automatically adjust the flow rate and temperature of the cooling medium according to the real-time temperature and operating status of the battery pack, avoiding unnecessary energy waste. This not only reduces the operating cost of the battery pack but also contributes to achieving green and environmentally friendly energy utilization. By monitoring parameters such as temperature and humidity inside the battery pack in real time, the intelligent control cooling pipeline can promptly detect potential safety hazards, such as overheating and overcharging. Once an abnormality is detected, the control system can quickly take measures, such as increasing cooling intensity or cutting off power, to prevent safety accidents. Intelligent control cooling piping can automatically adjust the cooling strategy based on the real-time status and operating requirements of the battery pack, ensuring that the battery pack is always kept within its optimal operating temperature range. This not only improves the energy density and power output of the battery pack but also reduces performance fluctuations caused by temperature changes.

[0052] A specific embodiment of this utility model also provides an electrical system comprising the aforementioned battery pack. In a specific embodiment, the electrical system can be any device or system requiring electric power, such as an electric car, electric bicycle, or power tool. The electrical system drives the operation of the electrical component using electrical energy provided by the battery pack. In a specific embodiment of this utility model, the battery pack and the electrical component can be electrically connected via cables, plugs, or other connection methods. Simultaneously, a cooling housing is placed inside the battery pack to achieve better cooling. Furthermore, the electrical system can be equipped with monitoring and protection devices to monitor and protect the operating status of the battery pack and the electrical component in real time. For example, the monitoring device can monitor parameters such as temperature, voltage, and current of the battery pack and the electrical component, and promptly issue alarms or take protective measures when abnormalities occur.

[0053] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A cooling housing, characterized in that, The cooling housing has an exhaust chamber and a cooling chamber. The exhaust chamber is used to contain thermal runaway gas, and the cooling chamber is used to contain a cooling medium to cool the thermal runaway gas in the exhaust chamber. The cooling housing includes a cooling plate with a cavity. The cavity separates the exhaust chamber and the cooling chamber. The exhaust chamber and the cooling chamber are not in communication. The exhaust chamber is suitable for placement near the thermal runaway gas, and the cooling chamber is suitable for placement away from the thermal runaway gas.

2. The cooling housing according to claim 1, characterized in that, The exhaust chamber is provided with an air inlet, which is located near the thermal runaway gas.

3. The cooling housing according to claim 1, characterized in that, The cooling chamber is disposed over the exhaust chamber.

4. The cooling housing according to claim 1, characterized in that, The cooling housing includes a sidewall, the sidewall forming a space suitable for accommodating the battery cell, and the sidewall including a sidewall cavity for accommodating a cooling medium.

5. The cooling housing according to claim 4, characterized in that, The sidewall includes a first cavity and a second cavity. Along the direction of gravity, the first cavity is located above the second cavity. The sidewall includes an outlet that connects the first cavity and the second cavity.

6. The cooling housing according to claim 5, characterized in that, The sidewall includes an inlet and an outlet, the inlet being connected to the sidewall cavity, and the outlet being connected to the sidewall cavity.

7. The cooling housing according to claim 6, characterized in that, The inlet is connected to the first cavity, and the outlet is connected to the second cavity.

8. The cooling housing according to claim 6, characterized in that, The inlet is located on the side away from the outlet.

9. The cooling housing according to claim 6, characterized in that, The inlet is located on the side away from the outlet.

10. A battery pack, characterized in that, The battery pack includes a cooling housing as described in any one of claims 1-3, and further includes battery cells placed within the cooling housing.

11. The battery pack according to claim 10, characterized in that, The battery pack includes a cooling housing according to any one of claims 4-9, characterized in that, along a first direction, the sidewall height is h1, the cell height is h2, and h1 and h2 satisfy: 1 / 2h2≤h1≤2 / 3h2, where the first direction is the sidewall extension direction.

12. The battery pack according to claim 11, characterized in that, The battery pack includes an adhesive for connecting the battery cell and the cooling housing. The outer surface area of ​​the battery cell is S1, and the contact area between the battery cell and the adhesive is S2. S1 and S2 satisfy: 0.5S1≤S2≤0.7S1.

13. The battery pack according to claim 11, characterized in that, The battery pack includes an intelligent control cooling pipeline, which controls the cooling medium and / or detects the internal environment of the battery pack.

14. An electrical system, characterized in that, The power system includes a battery pack according to any one of claims 10 to 13.

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