Battery assembly and device including same

Abstract

A battery assembly according to an embodiment comprises: a plurality of battery cells; a battery assembly frame that accommodates the battery cells and covers at least a portion of the battery cells; a battery cell cover that covers one side of the battery cells; and a refrigerant that circulates inside the battery assembly frame. A venting space is provided between the battery cell cover and one surface of the battery assembly frame.

Description

Battery assembly and device including the same

[0001] Cross-citation with related application(s)

[0002] This application claims the benefit of priority based on Korean Patent Application No. 10-2024-0173787 filed November 28, 2024, and all contents disclosed in the document of said Korean patent application are incorporated herein as part of this specification.

[0003] The present invention relates to a battery assembly and a device including the same, and more specifically, to a battery assembly with improved thermal management and safety and a device including the same.

[0004] With the technological development and increasing demand for mobile devices, the demand for secondary batteries as an energy source is rapidly rising. Accordingly, extensive research is being conducted on secondary batteries capable of meeting various requirements.

[0005] Secondary batteries are attracting significant attention as an energy source not only for mobile devices such as mobile phones, digital cameras, and laptops, but also for power units such as electric bicycles, electric vehicles, and hybrid electric vehicles.

[0006] Recently, with the increasing need for large-capacity secondary battery structures, including their utilization as energy storage sources, there is a growing demand for medium-to-large modular battery packs that combine battery assemblies in which multiple secondary batteries are connected in series or parallel.

[0007] Meanwhile, when configuring a battery pack by connecting multiple battery cells in series or parallel, it is common practice to configure a battery assembly consisting of at least one battery cell and to configure the battery pack by adding other components using at least one battery assembly.

[0008] Since the battery cells constituting these medium-to-large battery assemblies are rechargeable secondary batteries, such high-output, high-capacity secondary batteries generate a significant amount of heat during the charging and discharging process. In this case, the heat emitted from multiple battery cells is aggregated within a confined space, which can cause the temperature to rise rapidly and severely. In other words, while battery assemblies with stacked multiple cells and battery packs equipped with such assemblies can achieve high output, it is not easy to dissipate the heat generated by the cells during charging and discharging. If heat dissipation from the battery cells is not properly achieved, the cells degrade rapidly, shortening their lifespan and increasing the risk of explosion or ignition.

[0009] Furthermore, battery assemblies included in vehicle battery packs are frequently exposed to direct sunlight and may be subjected to high-temperature conditions, such as during the summer or in desert regions. Additionally, because multiple battery assemblies are densely packed to extend a vehicle's driving range, flames or heat generated in one battery assembly can easily propagate to neighboring ones, potentially leading to the ignition or explosion of the battery pack itself.

[0010] Therefore, it is necessary to develop technology for effectively cooling and securing each battery cell inside the battery assembly, which can further enhance the stability and reliability of the battery.

[0011] The problem that the present invention aims to solve is to provide a battery assembly that allows high-temperature gas to be safely discharged during a thermal runaway situation occurring within the battery assembly, while maintaining cooling performance stably without degradation. Specifically, the invention provides a battery assembly and a device including the same that allow gas generated during thermal runaway to be effectively discharged through an intended path to relieve internal pressure within the battery assembly and maintain stable thermal management without leakage of refrigerant.

[0012] However, the problems that the embodiments of the present invention aim to solve are not limited to the problems described above and can be expanded in various ways within the scope of the technical ideas included in the present invention.

[0013] A battery assembly according to one embodiment of the present invention comprises: a plurality of battery cells; a battery assembly frame that accommodates the battery cells and covers at least a portion of the battery cells; a battery cell cover that covers one side of the battery cells; and a refrigerant circulating inside the battery assembly frame. A venting space is provided between the battery cell cover and one side of the battery assembly frame.

[0014] The above battery cell cover may have a material that ruptures at a pressure above a certain level.

[0015] The battery cell cover may include an exhaust portion that ruptures at a pressure above a certain level.

[0016] Venting gas generated from the battery cell can rupture the battery cell cover and be discharged into the venting space.

[0017] As the battery cell cover melts due to the venting gas generated from the battery cell, the venting gas can be discharged into the venting space.

[0018] The above discharge section may be multiple.

[0019] Adhesive portions with adhesive applied thereto may be provided between the battery cell cover and one side of the battery assembly frame.

[0020] The space between the above adhesive parts may be the venting space.

[0021] At least one cell spacer may be located at least one location among the plurality of battery cells.

[0022] Adhesive portions with adhesive applied thereto are provided between the battery cell cover and one side of the battery assembly frame, and the adhesive portions can be positioned to correspond to the upper part of the cell spacer.

[0023] The above battery cells are stacked along one direction, and based on a direction perpendicular to the direction in which the battery cells are stacked, one adhesive portion may correspond to one cell spacer.

[0024] The cell spacer may include a plurality of flow holes drilled along the direction of the wider side of the battery cell.

[0025] The refrigerant may be able to move through the plurality of Euro holes mentioned above.

[0026] The battery cell cover may include an exhaust portion that ruptures at a pressure above a certain level.

[0027] The above discharge section includes a first curve and a second curve, and the first curve and the second curve may include a plurality of rupture holes.

[0028] The first curve and the second curve can be symmetrical to each other.

[0029] The first curve and the second curve can meet at two points.

[0030] The battery cell cover includes an exhaust portion that ruptures at a pressure above a certain level, and the exhaust portion may have notches, boundary portions having a thickness difference, or a plurality of holes formed therein.

[0031] The above refrigerant may come into contact with at least some of the battery cells and flow inside the battery assembly frame. According to another embodiment of the present invention, a device comprising at least one battery assembly is provided.

[0032] According to embodiments of the present invention, in the event of a thermal runaway situation occurring inside a battery assembly, high-temperature gas can be safely discharged to the outside through a discharge port provided in a battery cell cover. This allows for the rapid relief of pressure inside the battery assembly and reduces the risk of explosion, while ensuring that the refrigerant is stably maintained without leakage, thereby preventing degradation of thermal management performance.

[0033] The effects of the present invention are not limited to those mentioned above, and other unmentioned effects will be clearly understood by those skilled in the art from the description in the claims.

[0034] FIG. 1 is a perspective view showing a battery assembly according to one embodiment of the present invention.

[0035] Figure 2 is a plan view showing the battery assembly of Figure 1.

[0036] Figure 3 is a plan view of the battery assembly of Figure 1 viewed from a different angle than that of Figure 2.

[0037] Figure 4 is a plan view of the battery assembly of Figure 1 viewed from a different angle than that of Figures 2 and 3.

[0038] Figure 5 is a cross-sectional view showing a cross-section cut along the cutting line A-A' of Figure 2.

[0039] FIG. 6 is a cross-sectional view showing a battery assembly according to another embodiment of the present invention.

[0040] FIG. 7 is a cross-sectional view showing a battery assembly according to another embodiment of the present invention.

[0041] FIG. 8 is a plan view showing a discharge section according to one embodiment of the present invention.

[0042] FIG. 9 is a plan view showing a discharge section according to another embodiment of the present invention.

[0043] FIG. 10 is a drawing showing discharge sections according to various embodiments of the present invention.

[0044] Hereinafter, various embodiments of the present invention will be described in detail with reference to the attached drawings so that those skilled in the art can easily implement the present invention. The present invention may be embodied in various different forms and is not limited to the embodiments described herein.

[0045] To clearly explain the present invention, parts unrelated to the explanation have been omitted, and the same reference numerals are used for identical or similar components throughout the specification.

[0046] Furthermore, the size and thickness of each component shown in the drawings are depicted arbitrarily for convenience of explanation, and thus the present invention is not necessarily limited to what is illustrated. Thicknesses have been enlarged in the drawings to clearly represent various layers and regions. Additionally, for convenience of explanation, the thickness of some layers and regions has been exaggerated in the drawings.

[0047] Furthermore, when a part such as a layer, membrane, region, or plate is said to be "on" or "on" another part, this includes not only the case where it is "directly above" the other part, but also the case where there is another part in between. Conversely, when a part is said to be "directly above" another part, it means that there is no other part in between. Also, saying that a part is "on" or "on" a reference part means that it is located above or below the reference part, and does not necessarily mean that it is located "on" or "on" facing the opposite direction of gravity.

[0048] Furthermore, throughout the specification, when a part is described as "including" a certain component, this means that, unless specifically stated otherwise, it does not exclude other components but may include additional components.

[0049] Additionally, throughout the specification, "planar" means when the subject part is viewed from above, and "cross-sectional" means when the cross-section obtained by vertically cutting the subject part is viewed from the side.

[0050] FIG. 1 is a perspective view showing a battery assembly (100) according to an embodiment of the present invention. FIG. 2 is a plan view showing the battery assembly (100) of FIG. 1. FIG. 3 is a plan view of the battery assembly (100) of FIG. 1 viewed from an angle different from FIG. 2. FIG. 4 is a plan view of the battery assembly (100) of FIG. 1 viewed from an angle different from FIG. 2 and FIG. 3. FIG. 5 is a cross-sectional view showing a cross section cut along the cutting line A-A' of FIG. 2.

[0051] Referring to FIGS. 1 to 5, a battery assembly (100) according to one embodiment of the present invention comprises: a plurality of battery cells (110); a battery assembly frame (130) that accommodates the battery cells and covers one side of the battery cells; a battery cell cover (140) that covers one side of the battery cell stack; and a refrigerant circulating inside the battery assembly frame (130). A venting space (A1) is provided between the battery cell cover (140) and one side of the battery assembly frame (130).

[0052] The battery cell (110) according to the present embodiment may be a battery cell of various shapes, for example, a pouch-type battery cell, a prismatic battery cell, or a cylindrical battery cell. For example, as shown in FIG. 2, the battery cell (110) according to the present embodiment may be a pouch-type battery cell (110). Although the following description focuses on a pouch-type battery cell (110), the battery cell (110) according to the present embodiment is not limited thereto, and various types of battery cells may be applied.

[0053] In the battery assembly (100), battery cells (110) may be provided in multiple numbers. For example, multiple battery cells (110) may be stacked along one direction so as to be electrically connected to each other to form a battery cell stack (120). For example, multiple battery cells (110) may be stacked upright along a direction parallel to the X-axis of FIG. 4.

[0054] The battery cell stack (120) according to the present embodiment can be fixed inside the battery assembly frame (130) and maintained stably. By stably fixing the battery cell stack (120) to the battery assembly frame (130), positional variation of the battery cell (110) can be minimized. This protects the battery cell (110) from external shocks or vibrations, thereby preventing performance degradation of the battery assembly (100) and extending the lifespan of the battery cell (110). In addition, the fixing structure of the battery cell stack (120) is simple, which can reduce manufacturing costs and facilitate maintenance of the battery assembly (100).

[0055] The battery assembly frame (130) according to the present embodiment can prevent deformation of the battery cell stack (120) and protect the battery cell (110) from external shock or vibration. The battery assembly frame (130) may include a metal or polymer material that is lightweight yet highly durable.

[0056] The battery cell cover (140) according to the present embodiment is a component that covers one side of the battery cell stack (120) and may include a structure for effectively discharging heat and gas generated from the battery cell (110) to the outside. In particular, the battery cell cover (140) may be placed on the upper part of the battery cell stack (120).

[0057] The battery assembly frame (130) according to the present embodiment can be implemented in various forms. It is sufficient if it can cover at least some of the battery cells (110), and there are no special restrictions on the shape of the battery assembly frame (130).

[0058] In one embodiment, the battery assembly frame (130) may be in the form of a so-called 'mono frame'. In this case, the battery assembly frame (130) can simultaneously accommodate the battery cell (110) and protect it from the outside as a single integrated structure. The mono frame form has the advantage of being manufactured as a single frame structure, which reduces the number of parts and simplifies the manufacturing process.

[0059] In another embodiment, the battery assembly frame (130) may be configured to include a main frame and a battery assembly cover (150). In this case, the main frame supports and surrounds the battery cells (110), and the battery assembly cover (150) may cover and protect one side of the battery cells. This configuration facilitates maintenance of the battery cells (110) or replacement of individual parts, thereby providing design flexibility for specific applications. One of the parts of the battery assembly frame (130) may be the battery assembly cover (150). There are no specific restrictions on the method of joining the main frame and the battery assembly cover (150), and various methods such as welding or mechanical fastening may be applied.

[0060] A venting space (A1) may be provided between one side of the battery assembly frame (130) and the battery cell cover (140). In one embodiment, one side of the battery assembly frame (130) may correspond to the battery assembly cover (150). High-temperature gas generated during a thermal runaway situation can be safely discharged to the outside through the venting space (A1). This allows for the effective alleviation of the increase in internal pressure of the battery assembly (100). That is, the venting space (A1) can serve to reduce the risk of explosion and maintain the safety of the battery system by allowing the venting gas generated from the battery cell (110) to be discharged through a controlled path.

[0061] The battery assembly cover (150) according to the present embodiment may have a structure that is positioned on the outside of the battery cell cover (140) and combined with the main frame of the battery assembly frame (130). The battery assembly cover (150), together with the main frame of the battery assembly frame (130) and the battery cell cover (140), may serve to protect the battery cell stack (120) from the outside.

[0062] The refrigerant according to the present embodiment may be introduced into the battery assembly frame (130) and then discharged outside the battery assembly (100). At this time, the refrigerant may be a fluid. For example, the refrigerant may be insulating oil or cooling water. However, since the refrigerant comes into direct contact with the battery cell stack (120), other electrical components, etc., within the battery assembly (100), it is necessary to be electrically insulated. Therefore, the refrigerant may be insulating oil as a material having insulating properties. Specifically, the heat of the battery cell stack (120) can be effectively managed by circulating the refrigerant into the battery assembly frame (130). By circulating the refrigerant in direct contact with the battery cell stack (120), the heat of the battery cell (110) can be efficiently released.

[0063] The battery cell cover (140) may be equipped with a discharge section (141) to safely discharge venting gas generated during a thermal runaway situation. When a thermal runaway occurs, venting gas may be generated inside the battery cell (110). The discharge section (141) may rupture or open when the pressure exceeds a certain level to discharge the venting gas to the outside. Through the ruptured or opened part of the discharge section (141), the venting gas can move to the venting space (A1) and then be discharged to the outside of the battery assembly (100). That is, in a situation such as a thermal runaway, the venting gas can be rapidly discharged through the discharge section (141) of the battery cell cover (140), thereby effectively relieving the pressure inside the battery assembly (100). In particular, since the discharge section (141) discharges the venting gas by rupturing when the internal pressure exceeds a certain level during a thermal runaway, it is possible to discharge the venting gas without discharging the refrigerant. Therefore, even when gas is discharged due to thermal runaway, the refrigerant can circulate stably inside the battery assembly (100) without leakage. Through this, the battery cell stack (120) can maintain a stable state without the cooling performance of the battery assembly (100) deteriorating even in a thermal runaway situation.

[0064] In the battery assembly (100) according to the present embodiment, an immersion cooling method is applied in which a refrigerant directly cools the battery cells (110). In addition, a directional venting concept is applied to vent the venting gas discharged from the battery cells (110) in an intended direction.

[0065] Since both concepts are applied together, there may be problems such as the acceleration of thermal events or thermal runaways when gases or particles generated from the battery cell (110) come into contact with the cooling material, or the cooling material hindering the discharge of the gases or particles. To prevent such problems, it is desirable that the directional venting path for discharging gases, etc. generated from the battery cell (110) be provided in a location that does not affect the immersion cooling method as much as possible. To this end, a battery cell cover (140) may be provided in the battery assembly (100) according to the present embodiment. By the battery cell cover (140), the venting space (A1) through which gases or particles generated from the battery cell (110) are discharged and the space through which a refrigerant flows in contact with the battery cells (110) to cool the battery cell (110) can be separated and isolated. Accordingly, the influence or interference between the directional venting path through which the gas generated in the battery cell (110) is discharged and the cooling material flowing in contact with the battery cell (110) can be minimized. As a result, problems such as the acceleration of thermal events or thermal runaways caused by gas or particles coming into contact with the cooling material, or the cooling material obstructing the discharge of said gas or particles, can be prevented.

[0066] As long as the battery cell cover (140) can distinguish between the venting space (A1) and the space where the refrigerant flows, there are no special restrictions on its shape or material. For example, the battery cell cover (140) may be a plate-shaped member having a predetermined thickness. In FIG. 4 or FIG. 5, a battery cell cover (140) that is a plate-shaped member covering the upper portion of the battery cells (110) is illustrated as one example. Additionally, the battery cell cover (140) according to the present embodiment may be a member that is integral with the battery assembly frame (130). Furthermore, the battery cell cover (140) according to another embodiment may be a separate member from the battery assembly frame (130) and may be in a form that is coupled to or fixed to the battery assembly frame (130).

[0067] A gas exhaust path, i.e., a venting space (A1), can be provided in conjunction with one side of the battery assembly frame (130) and the battery cell cover (140) so that venting gas can be safely discharged to the outside. As described above, one side of the battery assembly frame (130) may correspond to the battery assembly cover (150), and in the event of thermal runaway, venting gas discharged through the exhaust section (141) can be discharged to the outside through the space between the battery assembly cover (150) and the battery cell cover (140). The battery assembly cover (150) may be designed to withstand high pressure generated during gas discharge and may be made of a high-strength heat-resistant material. Additionally, it may have a cushioning structure to mitigate the impact generated when gas is discharged, thereby maintaining stability within the battery assembly (100).

[0068] In this way, the battery cell cover (140) and the battery assembly frame (130) cooperate to provide a function that can safely vent the venting gas to the outside in a thermal runaway situation occurring inside the battery cell stack (120), thereby greatly improving the safety of the battery system.

[0069] Referring again to FIGS. 1 to 5, the battery cell cover (140) may have a material that ruptures at a pressure above a certain level. That is, the battery cell cover (140) can easily rupture due to the venting gas discharged from the battery cell (110), and the venting gas can move into the venting space (A1).

[0070] The battery cell cover (140) according to the present embodiment is designed to safely discharge gas in response to thermal runaway or overpressure situations occurring inside the battery cell (110), and can serve as an important element for maintaining the stability of the battery even in high temperature and high pressure environments. Specifically, the battery cell cover (140) may include a high heat-resistant material such as a polyimide film, and such a material may have the characteristic of being able to rupture within a specific pressure, for example, in the range of 0.5 MPa to 1.5 MPa. The battery cell cover (140) ruptures when the pressure inside the battery assembly (100) exceeds a specific limit, thereby rapidly relieving the internal pressure of the battery system. Through this, the high-temperature gas generated in the battery cell (110) is safely discharged to the outside, thereby reducing the risk of explosion and maintaining the stability of the entire battery assembly (100). In another embodiment, the battery cell cover (140) may use a polymer material that is sensitive to pressure, and such material may selectively rupture when the pressure within the battery assembly (100) exceeds a certain level. For example, a polymer film or a thin metal film with controlled rupture characteristics may be used, and such materials may be structurally very thin and precisely designed to have characteristics that allow them to be easily damaged depending on pressure conditions. In this case, the battery cell cover (140), together with the battery assembly frame (130), forms a path to release gas when the internal pressure of the battery cell (110) rises rapidly, thereby inducing the high-temperature gas to be quickly discharged to the outside. As a result, the refrigerant inside the battery assembly (100) can be maintained stably without being discharged, and the temperature and pressure inside the battery assembly (100) can be effectively controlled even in a thermal runaway situation.That is, the battery cell cover (140) is designed to discharge only gas in a high temperature and high pressure environment and to keep the refrigerant inside the battery assembly (100), so that stable thermal management can be achieved while maintaining the efficiency of the cooling system.

[0071] Referring again to FIGS. 1 to 5, the battery cell cover (140) may include an exhaust portion (141) which is a portion that ruptures at a pressure above a certain level.

[0072] The exhaust section (141) according to the present embodiment may rupture when it reaches a certain pressure during thermal runaway. This rupture process can relieve excessive pressure inside the battery assembly (100) to prevent explosion and maintain safety within the battery assembly (100). The exhaust section (141) may be positioned on the upper part of the battery cell cover (140) and may be designed to discharge gas into the area between the battery cell (110) and one side of the battery assembly frame (130). This structure may provide a gas discharge path so that high-temperature gas can be released to the outside without damaging other components inside the battery assembly (100).

[0073] That is, by rupturing the discharge section (141) at a pressure above a certain level, high-temperature gas inside the battery assembly (100) can be rapidly discharged to the outside in emergency situations such as thermal runaway. This prevents an excessive rise in pressure inside the battery assembly (100) and reduces the risk of explosion, thereby improving the safety of the battery system.

[0074]

[0075] FIG. 6 is a cross-sectional view showing a battery assembly according to another embodiment of the present invention.

[0076] Referring to FIGS. 1 to 4 and FIG. 6, venting gas generated from the battery cell (110) can rupture the battery cell cover (140) and be discharged into the venting space (A2).

[0077] If thermal runaway or excessive heat generation occurs inside the battery assembly (100) according to the present embodiment, venting gas may be generated from the battery cell (110). This venting gas can rapidly increase the pressure inside the battery assembly (100) and cause the battery cell cover (140) to rupture. Specifically, the battery cell cover (140) may rupture when the pressure inside the battery assembly (100) rises above a certain level, thereby providing a path to safely discharge the venting gas. When the battery cell cover (140) ruptures, the venting gas can be discharged to the outside through the venting space (A2). For example, if the battery cell (110-1) of FIG. 6 generates venting gas due to heat generation, the venting gas can pass through the battery cell cover (140) and be discharged into the venting space (A2). Through this, the excessive pressure inside the battery assembly (100) can be quickly relieved.

[0078] One side of the battery assembly frame (130) can form a path so that venting gas can be discharged into the venting space (A2). This discharge path guides the venting gas generated when the battery cell cover (140) ruptures to be safely discharged to the outside and can control the process of the venting gas flowing out. That is, as the venting gas is discharged into the venting space (A2) between one side of the battery assembly frame (130) and the battery cell cover (140), the pressure inside the battery assembly (100) can be rapidly reduced, thereby significantly reducing the risk of explosion inside the battery assembly (100). Consequently, the battery assembly frame (130) performs the role of maintaining the structural stability of the battery assembly (100) together with the battery cell cover (140), and can provide a structure that can stably discharge gas even in the event of thermal runaway.

[0079] Referring again to FIGS. 1 to 4 and FIG. 6, the battery cell cover (140) melts due to the venting gas generated from the battery cell (110), and the venting gas can be discharged into the venting space (A2).

[0080] According to the present embodiment, high-temperature venting gas may be generated due to a thermal runaway situation occurring inside the battery cell (110). Venting gas is generated as the internal temperature of the cell rises rapidly, which may cause the pressure of the battery assembly (100) to increase. This high-temperature venting gas may heat the battery cell cover (140) and cause it to gradually melt. The battery cell cover (140) may be made of a material that can melt above a certain temperature, thereby forming a path through which the high-temperature gas generated from the battery cell (110) can be discharged to the outside while melting a part of the battery cell cover (140).

[0081] Through the gas discharge path formed in this way, the venting gas can move to the venting space (A2). The venting space (A2) can provide a space where the venting gas can be safely dispersed. The venting space (A2) may have sufficient space to effectively discharge the high-temperature gas generated in the battery cell (110) to the outside. The venting space (A2) may be formed by a double structure consisting of the space between the battery assembly cover (150) and the battery cell cover (140). This prevents an increase in internal pressure and reduces the risk of explosion by allowing the gas to be safely discharged to the outside. In addition, the refrigerant can be maintained stably without leaking during the venting process of the venting gas, thereby providing continuous cooling performance within the battery assembly (100). Due to the maintenance of this cooling performance, the overall safety and lifespan of the battery system can be extended.

[0082] Referring again to FIGS. 1 through 5, there may be multiple exhaust sections (141). Multiple exhaust sections (141) may be distributed at various locations on the battery cell cover (140). As a result, the venting gas can be dispersed and discharged through multiple paths. Specifically, by forming multiple exhaust sections (141) on the battery cell cover (140), the venting gas generated during thermal runaway is not discharged only at a specific point, but can be discharged simultaneously at multiple locations on the battery cell cover (140). The exhaust sections (141) may be positioned on the top or side of the battery cell cover (140), or at a location in close contact with the battery cell stack (120), and each exhaust section (141) may be designed to rupture independently when high pressure occurs. Through this, the gas discharge path does not rely on a single path, but the gas is discharged through multiple paths, thereby rapidly relieving the pressure inside the battery assembly (100).

[0083] Multiple exhaust sections (141) can be evenly distributed along the entire surface area of ​​the battery cell cover (140), and the more dispersed the exhaust sections (141) are, the more efficiently the venting gas can be discharged. The size and location of the exhaust sections (141) can be optimized according to the design conditions of the battery assembly (100), and the number and arrangement method of the exhaust sections (141) can be determined so that the venting gas can be safely discharged to the outside.

[0084] That is, a structure provided with multiple exhaust ports (141) can increase the efficiency of pressure relief compared to a structure provided with only a single exhaust port (141), and as a result, can prevent excessive pressure rise inside the battery assembly (100). This reduces the possibility of explosion of the battery cell (110) and improves the safety of the battery assembly (100). In addition, since venting gas is discharged quickly and uniformly through the multiple exhaust ports (141), the temperature and pressure inside the battery assembly (100) can be maintained stably, and the overall performance and reliability of the battery assembly (100) can be improved.

[0085] FIG. 7 is a cross-sectional view showing a battery assembly according to another embodiment of the present invention.

[0086] Referring to FIGS. 1 to 4 and FIG. 7, adhesive portions (160) with adhesive applied between one surface of the battery cell cover (140) and the battery assembly frame (130) may be provided. For example, the adhesive portion (160) may be provided by applying adhesive between the battery cell cover (140) and the battery assembly cover (150) of the battery assembly frame (130).

[0087] The adhesive portions (160) according to the present embodiment can serve to firmly bond the battery cell cover (140) and the battery assembly frame (130). Additionally, they can perform the function of controlling the flow of gas when venting gas is discharged. Specifically, when the battery cell cover (140) and the battery assembly frame (130) are assembled together, the adhesive can seal the venting space (A1) between the battery cell cover (140) and the battery assembly frame (130). The adhesive can prevent gas from leaking out through the gap between the battery cell cover (140) and the battery assembly frame (130) while the venting gas is discharged to the outside, thereby helping the gas to be discharged through a specific path.

[0088] The adhesive portions (160) can be uniformly spaced at regular intervals between the battery cell cover (140) and the battery assembly frame (130). This allows the venting gas to be discharged through the discharge portion (141) of the battery cell cover (140) without spreading into the gap between the battery assembly frame (130) and the battery cell cover (140), and to be discharged to the outside through a clear discharge path. Additionally, the adhesive portions (160) maintain the structural stability of the battery cell cover (140) and the battery assembly cover (150), and prevent the battery cell cover (140) and the battery assembly cover (150) from separating even in the event of thermal runaway.

[0089] The adhesive portion (160) may be composed of a high-heat-resistant adhesive and may be designed so that the battery assembly (100) can maintain its structure stably without physical deformation even in a thermal runaway situation. For example, the adhesive may be composed of a silicone-based high-heat-resistant material and may be designed to withstand high heat and pressure generated inside the battery assembly (100).

[0090] Referring again to FIGS. 1 to 4 and FIG. 7, the space between the adhesive portions (160) may be a venting space (A3).

[0091] The adhesive applied between the battery cell cover (140) and the battery assembly frame (130) of the battery assembly (100) according to the present embodiment may form a plurality of adhesive portions (160), and a venting space (A3) may be formed between these adhesive portions (160). The venting space (A3) may function as a path for venting gas to be discharged, and may allow the gas to be safely discharged to the outside along a specific flow. That is, the adhesive forms a partition between the battery cell cover (140) and the battery assembly frame (130) to allow the gas to move through a limited path, and the venting space (A3) between the adhesive portions (160) may be used as a gas discharge path. That is, each of the spaces surrounded by the battery cell cover (140), one side of the battery assembly frame (130), and the adjacent adhesive portions (160) may correspond to the venting space (A3).

[0092] Specifically, when thermal runaway occurs in the battery assembly (100) and venting gas is generated in the battery cell (110-1) of FIG. 7, the venting gas can be discharged through the discharge portion (141) of the battery cell cover (140) into the space between one side of the battery assembly frame (130) and the battery cell cover (140). At this time, the adhesive portions (160) partially block the gap between the battery cell cover (140) and the battery assembly frame (130), but the space (A3) formed between the adhesive portions (160) can be used as a passageway for the venting gas to be discharged to the outside. The adhesive portions (160) can perform the function of allowing the venting gas to move safely along a certain path while maintaining the structural stability of the battery assembly (100).

[0093] The venting space (A3) between the adhesive portions (160) according to the present embodiment can form a sufficiently large passageway to allow gas to flow, and the venting space (A3) can play an important role in venting the venting gas generated from the discharge portion (141) of the battery cell cover (140) to the outside. In addition, the venting space (A3) between the adhesive portions (160) can induce the venting gas to move along an intended path, so that the venting gas does not spread to adjacent spaces but moves outside the battery assembly (100) through a clear discharge path.

[0094] By using the venting space (A3) provided between the adhesive portions (160) as a path for the venting gas to travel, the gas generated inside the battery assembly (100) can be safely discharged in a controlled manner. Through this, the venting gas generated during a thermal runaway situation can be rapidly discharged through the discharge portion (141) of the battery cell cover (140), while also traveling stably along the venting space (A3) between the adhesive portions (160) to be discharged to the outside. This structure helps relieve pressure inside the battery assembly (100) and prevents the venting gas from leaking out through unnecessary paths, thereby maximizing safety. In other words, the adhesive portions (160) control the flow of the venting gas while maintaining the airtightness of the battery assembly (100), thereby helping to stably maintain the performance of the battery assembly (100) even in situations such as thermal runaway.

[0095] Additionally, the adhesive portion (160) can minimize the propagation of a thermal runaway phenomenon occurring in a battery cell (110) to adjacent battery cells (110). Venting gas introduced into the venting space (A3) between adjacent adhesive portions (160) flows only along the venting space (A3) and cannot move beyond the adhesive portions (160) to another venting space (A3). For example, in FIG. 7, if a battery cell (110-1) undergoes thermal runaway and generates venting gas, the exhaust portion (141) of the battery cell cover (140) located above the battery cell (110-1) ruptures, and the venting gas moves to the venting space (A3) above the battery cell (110-1). At this time, because the venting space (A3) is separated by the adhesive portions (160), the venting gas cannot move to another venting space (A3). If the venting gas moves to another venting space (A3), due to the pressure difference, the venting gas may penetrate the battery cell cover (140) and flow back into the location of an adjacent battery cell (110). Since the venting gas is in a high-temperature state, it can cause thermal runaway in the adjacent battery cell (110), which leads to thermal propagation where the thermal runaway phenomenon spreads, eventually resulting in an explosion or fire. The adhesive part (160) according to the present embodiment can perform the function of preventing the thermal runaway phenomenon generated in one battery cell (110-1) from spreading to other battery cells (110). That is, the adhesive part (160) can perform the role of maintaining independent venting paths so that the venting spaces (A3) provided between the adhesive parts (160) are not connected to each other. Through this, the spread of the thermal runaway phenomenon generated in the battery cell (110) to adjacent battery cells (110) can be minimized.

[0096] Referring again to FIGS. 1 to 4 and FIG. 7, at least one cell spacer (170) may be located at least one location among the plurality of battery cells (110).

[0097] The cell spacer (170) according to the present embodiment can maintain a physical gap between battery cells (110) and help the refrigerant circulate smoothly. The cell spacer (170) can prevent the battery cells (110) from overheating or deforming due to close contact, and can also perform the function of increasing the heat dissipation efficiency between battery cells (110).

[0098] Specifically, by inserting cell spacers (170) between multiple battery cells (110), the structural stability of the battery assembly (100) can be improved while maintaining an appropriate spacing between the battery cells (110). The cell spacers (170) can be made of a thermally stable material and can effectively dissipate heat generated from the battery cells (110). For example, the cell spacers (170) can be made of a metal or a polymer material with high thermal conductivity to help quickly remove heat generated as the refrigerant passes between the battery cells (110). That is, the gap between the battery cells (110) can be maintained by the cell spacers (170), and the cell spacers (170) can maximize the cooling effect by providing sufficient space for the refrigerant to circulate between the cells. As a result, the thermal management of the entire battery assembly (100) can be performed more efficiently.

[0099] The cell spacer (170) may have a surface that contacts one side of the battery cells (110) located in the center of the battery cell stack (120). Specifically, one side of the cell spacer (170) may contact one side of the battery cell (110) facing the one side of the cell spacer (170). The other side of the cell spacer (170) may contact one side of the battery cell (110) facing the other side of the cell spacer (170).

[0100] The cell spacer (170) can be bonded and fixed to adjacent battery cells (110). For example, although not shown in the drawing, an adhesive member may be interposed between at least a portion of one side of the battery cell (110) and at least a portion of one side of the cell spacer (170), and an adhesive member may be interposed between at least a portion of one side of an adjacent battery cell (110) and at least a portion of the other side of the cell spacer (170). That is, the battery cell (110) and the cell spacer (170) can be bonded and fixed in at least some area. For example, the adhesive member may be an insulating tape. Of course, a form in which the battery cell (110) and the cell spacer (170) come into contact with each other without an adhesive member also corresponds to an embodiment of the present invention.

[0101] The size of the cell spacer (170) may be larger than the size of the battery cell (110). That is, the height of the cell spacer (170) (in the Z-axis direction of FIG. 5) may be larger than the height of the battery cell (110). In this case, the battery cell (110) may be attached to the cell spacer (170) and positioned as if floating inside the battery assembly (100) frame (130) without contacting the battery assembly (100) frame (130). Specifically, the upper edge and lower edge of the battery cell (110) may be positioned at a certain height from one end and the other end of the cell spacer (170). More specifically, when the height of the cell spacer (170) (in the Z-axis direction of FIG. 5) is higher than the height of the battery cell (110) (in the Z-axis direction of FIG. 5), the battery cell (110) can be fixed adhesively while positioned at the center of the cell spacer (170).

[0102] Referring again to FIGS. 1 to 4 and FIG. 7, adhesive portions (160) with adhesive applied thereto may be provided between one side of the battery cell cover (140) and the battery assembly frame (130). At this time, the adhesive portion (160) may be positioned to correspond to the upper part of the cell spacer (170).

[0103] An adhesive portion (160) may be provided between the battery assembly frame (130) and the battery cell cover (140) according to the present embodiment, and the adhesive portion (160) may be positioned between the battery assembly frame (130) and the battery cell cover (140) with adhesive applied. The adhesive portion (160) can absorb vibrations or shocks that may occur inside the battery assembly (100) and help to firmly fix the battery cells (110). In particular, by positioning the adhesive portion (160) to correspond to the upper part of the cell spacer (170), the position of the battery cells (110) is accurately fixed, and the spacing between the battery cells (110) is maintained uniformly, thereby stabilizing the placement and alignment of the battery cells (110).

[0104] The adhesive portion (160) according to the present embodiment may include a heat-resistant adhesive capable of maintaining adhesive performance even under high temperature and high pressure conditions. This may have characteristics capable of withstanding thermal damage caused by high-temperature gas generated during thermal runaway. For example, a silicone-based adhesive or an epoxy adhesive may be used, which can stably fix the battery cell cover (140) without losing adhesive strength even at high temperatures.

[0105] Consequently, the adhesive portion (160) is designed to withstand pressure changes that may occur during the gas discharge process, so that the battery cell (110) can be firmly secured even during gas discharge. This improves the overall structural stability of the battery assembly (100), thereby increasing the durability of the battery assembly (100). Additionally, the adhesive portion (160) is positioned to correspond precisely to the upper part of the cell spacer (170), so that the position of the battery cell (110) does not waver and a consistent spacing can be maintained. In other words, since it helps the battery cell (110) to be uniformly distributed within the battery assembly (100), it can contribute to increasing electrical stability and maximizing battery efficiency. Furthermore, by maintaining a constant spacing between the battery cells (110), thermal management and cooling performance can be optimized.

[0106] Additionally, as described above, the adhesive portion (160) according to the present embodiment can perform the function of maintaining independent venting paths so that the venting spaces (A3) provided between the adhesive portions (160) do not communicate with each other. When the adhesive portions (160) are positioned to correspond to the upper part of the cell spacer (170), the battery cells (110) can have independent venting paths that do not affect each other. Since the battery cells (110) are partitioned into a certain space by the cell spacer (170), if one battery cell (110-1) undergoes thermal runaway and venting gas is generated, the venting gas cannot be transmitted to another battery cell (110) by crossing the cell spacer (170), but moves directly to the venting space (A3) through the ruptured battery cell cover (140). The venting gas that has moved to the venting space (A3) flows only along the venting space (A3) as described above, and cannot move beyond the adhesive portions (160) to another venting space (A3).

[0107] The cell spacer (170) can perform a primary thermal propagation prevention function, and the adhesive portion (160) can perform a secondary thermal propagation prevention function to prevent venting gas introduced into the venting space (A3) from moving to another venting space (A3). That is, in this embodiment, the adhesive portions (160) are positioned to correspond to the upper part of the cell spacer (170), so that a certain unit of battery cells (110) can maintain independent venting paths without communicating with each other, and consequently, the propagation of a thermal runaway phenomenon generated in a battery cell (110) to adjacent battery cells (110) can be minimized.

[0108] More specifically, battery cells (110) are stacked along one direction, and one adhesive portion (160) may correspond to one cell spacer (170) based on a direction perpendicular to the direction in which the battery cells (110) are stacked.

[0109] A battery assembly (100) according to the present embodiment may be configured such that a plurality of battery cells (110) are stacked in one direction. The battery cell stack (120) may be supported by a battery assembly frame (130), and the battery assembly frame (130) may provide structural stability for the battery cells (110).

[0110] Cell spacers (170) may be placed between battery cells (110). The cell spacers (170) can maintain a constant spacing between each battery cell (110) and perform the function of managing heat and mitigating mechanical shock.

[0111] An adhesive portion (160) may be provided between the battery cell cover (140) and the battery assembly cover (150). The adhesive portion (160) may be positioned to correspond to the upper portion of the cell spacer (170) with respect to the Z-axis of FIG. 7, which is perpendicular to the stacking direction of the battery cell (110). The adhesive portion (160) may use a heat-resistant adhesive that provides stable adhesion even in high temperature and high pressure environments, thereby helping to securely fix the battery cells (110). The adhesive portion (160) may be positioned to match each cell spacer (170) to maintain a constant spacing and structural consistency when the battery cells (110) are stacked.

[0112] By positioning the adhesive portion (160) at a location corresponding to the cell spacer (170), the overall structural stability of the battery cell stack (120) is enhanced. That is, since the battery cells (110) are stably fixed in a direction perpendicular to the stacking direction, it is possible to prevent the battery cells (110) from moving or changing position even when the battery assembly (100) is exposed to external shock or vibration. This can contribute to improving the durability of the battery and extending its lifespan.

[0113] Referring again to FIGS. 1 to 5, the cell spacer (170) may include a plurality of flow holes (171) drilled along the direction of the longer side of the battery cell (110).

[0114] The cell spacer (170) according to the present embodiment may include a plurality of flow holes (171) drilled along the longitudinal direction. By including a plurality of flow holes (171) drilled along the direction of the longer side of the battery cell (110), the battery cell (110) can be cooled uniformly. Through this, damage caused by overheating of a specific part of the battery cell (110) can be prevented.

[0115] That is, the cell spacer (170) can effectively disperse heat within the battery cell stack (120) and allow the refrigerant to circulate between the battery cells (110), thereby optimizing the thermal management of the entire battery assembly (100). As a result, the temperature of the battery cells (110) is maintained uniformly, and the performance and lifespan of the battery assembly (100) can be improved. Additionally, the cell spacer (170) can be positioned between the battery cells (110) to improve the structural stability of the entire battery assembly (100). This can increase the mechanical strength of the battery assembly (100) and increase the durability of the battery assembly (100) against external shocks or vibrations.

[0116] Referring again to FIGS. 1 to 5, the refrigerant may be able to move through a plurality of Euro holes (171).

[0117] The flow path holes (171) according to the present embodiment provide a path through which the refrigerant can move, allowing the refrigerant to flow between the battery cells (110). The refrigerant can move through a plurality of flow path holes (171). In this case, the refrigerant moves while receiving heat generated from the battery cells (110), so it can effectively cool the battery cells (110) located in the center of the battery cell stack (120). A portion of the refrigerant can directly cool the battery cells (110) by coming into direct contact with them, and at the same time, another portion of the refrigerant can indirectly cool the battery cells (110) through the cell spacers (170) by moving along the flow path holes (171). FIG. 8 is a plan view showing a discharge section according to an embodiment of the present invention.

[0118] Referring to FIGS. 1 to 5 and FIG. 8, the discharge portion (141) includes a first curve (141a) and a second curve (141b), and the first curve (141a) and the second curve (141b) may include a plurality of rupture holes (142).

[0119] The first curve (141a) and the second curve (141b) according to the present embodiment may be arranged along the outer edge of the battery cell (110). The first curve (141a) and the second curve (141b) may be arranged parallel to each other while maintaining a constant distance. Through this, a passage can be formed that effectively disperses and discharges gas generated in the battery cell (110) to the outside.

[0120] A plurality of rupture holes (142) may be formed on the first curve (141a) and the second curve (141b). The rupture holes (142) may consist of small holes designed to rupture when a preset pressure or higher is applied, and each rupture hole (142) may be arranged in a curved shape to uniformly relieve pressure during thermal runaway. For example, the rupture holes (142) may include a polymer film or a metal material that selectively ruptures when a specific temperature and pressure are applied.

[0121] The first curve (141a) and the second curve (141b) are arranged parallel to each other, so that the first curve (141a) and the second curve (141b) are balanced to provide an effective discharge path for releasing gas to the outside. In particular, this curve shape can prevent the gas from being discharged in one direction all at once and help it to be discharged evenly distributed along the entire circumference of the battery cell (110). This can help prevent structural damage that may occur if high-pressure gas is discharged concentrated in one direction and contribute to improving safety.

[0122] In addition, by arranging the first curve (141a) and the second curve (141b) around the battery cell (110), the gas is not concentrated in one direction but can be evenly dispersed and discharged throughout the battery cell (110). This structure can contribute to minimizing structural damage to the battery cell (110) caused by gas discharge during thermal runaway and significantly improving the durability and stability of the battery system.

[0123] Referring again to FIGS. 1 to 5 and FIG. 8, the first curve (141a) and the second curve (141b) can be symmetrical to each other.

[0124] According to the present embodiment, the first curve (141a) and the second curve (141b) may be symmetrically arranged along the outer edge of the battery cell (110), and rupture holes (142) may be formed at regular intervals in the first curve (141a) and the second curve (141b). This symmetrical structure allows high-temperature venting gas generated during thermal runaway to be uniformly dispersed along the first curve (141a) and the second curve (141b), thereby helping the gas to be effectively discharged to the outside. Additionally, due to the symmetrical arrangement, a uniform discharge path can be formed throughout the battery cell (110), which can contribute to preventing heat and pressure from concentrating on one side.

[0125] That is, as the first curve (141a) and the second curve (141b) are arranged symmetrically with respect to each other, the high-temperature gas generated during thermal runaway can be evenly dispersed. This prevents the gas from being discharged unevenly to one side, thereby allowing for uniform pressure relief across the entire area of ​​the battery assembly (100). This can provide the effect of reducing the risk of explosion of the battery assembly (100) and improving safety.

[0126] FIG. 9 is a plan view showing a discharge section according to another embodiment of the present invention.

[0127] Referring to FIGS. 1 to 5 and FIG. 9, the first curve (141a) and the second curve (141b) can meet at two points.

[0128] The structure in which the first curve (141a) and the second curve (141b) according to the present embodiment meet at two points can form an important discharge path that guides high-temperature and high-pressure gas to be safely discharged outside the battery assembly (100). That is, the structure in which the first curve (141a) and the second curve (141b) meet at two points forms a specific path through which gas can be discharged intensively in emergency situations such as thermal runaway, thereby rapidly relieving the internal pressure of the battery assembly (100). In addition, these intersection points can serve to prevent the phenomenon where gas becomes excessively concentrated and accumulates on one side. This can contribute to reducing the risk of explosion occurring inside the battery assembly (100) and ensuring the safety of the battery cell (110).

[0129] Consequently, this structure provides an additional discharge point where gas can escape by the first curve (141a) and the second curve (141b) meeting at the end of the discharge section (141), thereby preventing the pressure inside the battery assembly (100) from rapidly increasing when thermal runaway occurs and effectively relieving the pressure.

[0130] A plurality of rupture holes (142) arranged along the first curve (141a) and the second curve (141b) can perform the function of automatically rupturing to release gas to the outside when a certain pressure is reached. The rupture holes (142) can be arranged at regular intervals along the first curve (141a) and the second curve (141b) so that gas around the battery cell (110) can be released and pressure can be evenly distributed.

[0131] FIG. 10 is a drawing showing discharge portions (141) according to various embodiments of the present invention.

[0132] Referring to FIGS. 1 to 4 and FIG. 10, the battery cell cover (140) may include an exhaust portion (141, 141a, 141b, 141c, 141d) which is a portion that ruptures at a pressure above a certain level. In various embodiments of the present invention, notches (N1, N2), boundary portions having a thickness difference, or a plurality of holes (H1, H2, H3, H4) may be formed in the exhaust portion (141, 141a, 141b, 141c, 141d).

[0133] Referring to FIG. 10 (a) to (d), at least a portion of the discharge portion (141a, 141b, 141c, 141d) according to an embodiment of the present invention may rupture when a certain amount of pressure is applied. At least a portion of the discharge portion (141) may rupture due to gas or particles ejected from the battery cell (110), and may move to the venting space (A2) through the ruptured portion and be discharged.

[0134] First, referring to FIG. 10(a), the discharge portion (141a) according to one embodiment of the present invention may be a plate-shaped member. The discharge portion (141a) may include a material that can be easily ruptured by the venting gas ejected from the battery cell (110), or may have a sufficiently thin thickness so as to be easily ruptured by the venting gas ejected from the battery cell (110).

[0135] Referring to FIG. 10(b), notches (N1, N2) may be formed in the discharge section (141b) according to another embodiment of the present invention to form a portion that ruptures when pressure exceeding a certain level is applied. The notches (N1, N2) indicate a portion that is recessed by a predetermined thickness in the discharge section (141b). The discharge section (141b) may include a first portion (141-1) and a second portion (141-2), and the first portion (141-1) and the second portion (141-2) may be separated by the notches (N1, N2). The first portion (141-1) is a portion where rupture is induced, and the notches (N1, N2) and the first portion (141-1) are ruptured by the venting gas ejected from the battery cell (110), thereby allowing the gas to move into the venting space (A2).

[0136] Referring to FIG. 10 (c), in order to form a portion that ruptures when pressure exceeding a certain level is applied, a boundary portion having a thickness difference may be formed in the discharge portion (141c) according to another embodiment of the present invention. The discharge portion (141c) may include a first portion (141-1) and a second portion (141-2), and the first portion (141-1) may be a portion that is thinner than the second portion (141-2) and may be a portion where rupture is induced. The boundary between the first portion (141-1) and the second portion (141-2) may correspond to the boundary portion having a thickness difference. The first portion (141-1), which has weak strength due to its thin thickness, may rupture due to the venting gas ejected from the battery cell (110), and the venting gas may move to the venting space (A2) through the ruptured first portion (141-1).

[0137] Referring to FIG. 10 (d), in order to form a portion that ruptures when pressure exceeding a certain level is applied, a plurality of holes (H1, H2, H3, H4) may be formed in the discharge portion (141d) according to another embodiment of the present invention. The plurality of holes (H1, H2, H3, H4) refer to holes that penetrate the discharge portion (141d). The discharge portion (141d) may include a first portion (141-1) and a second portion (141-2), and the first portion (141-1) and the second portion (141-2) may be separated by a plurality of holes (H1, H2, H3, H4) arranged at a predetermined interval. A plurality of holes (H1, H2, H3, H4) arranged at a predetermined interval may form a boundary between the first portion (141-1) and the second portion (141-2). The portion between the multiple holes (H1, H2, H3, H4) or the first portion (141-1) is ruptured by the venting gas ejected from the battery cell (110), and the venting gas can move into the venting space (A2).

[0138] The refrigerant may come into contact with at least some of the battery cells (110) and flow inside the battery assembly frame (130).

[0139] The refrigerant circulates within the battery assembly frame (130) and can absorb heat while in contact with the battery cells (110). This effectively dissipates the heat generated by the battery cells (110) during operation, and the refrigerant can suppress the temperature rise of the entire battery system by rapidly moving the heat within the battery assembly (100). As the refrigerant, insulating oil with high thermal conductivity, a water-glycol mixture, or a special coolant may be used, which can help prevent overheating of the battery cells (110) and maintain a stable temperature even during long-term high-output use.

[0140] The flow of the refrigerant plays an important role in maintaining a uniform temperature of the battery cell (110). In addition, since the refrigerant is in direct contact with the battery cell (110), heat exchange is facilitated, which can help minimize the degradation of battery performance at high temperatures. That is, by circulating the refrigerant inside the battery assembly frame (130), the temperature distribution of the entire battery system can be maintained uniformly. As a result, a specific battery cell (110) does not overheat, and the entire battery system maintains a uniform temperature state, thereby improving the lifespan and performance of the battery assembly (100). This can increase the durability of the battery assembly (100) and ensure long-term performance stability of the battery assembly (100). According to another embodiment of the present invention, a device comprising at least one battery assembly (100) is provided.

[0141] One or more battery assemblies (100) according to the embodiment described above can be mounted together with various control and protection systems, such as a Battery Management System (BMS), a Battery Disconnect Unit (BDU), and a cooling system, to form a battery assembly (100).

[0142] The battery assembly (100) can be applied to various devices. Specifically, it can be applied to means of transportation such as electric bicycles, electric vehicles, and hybrids, but is not limited thereto and can be applied to various devices capable of using the secondary battery assembly (100).

[0143] In this embodiment, terms indicating directions such as front, back, left, right, up, and down have been used; however, these terms are for convenience of explanation only and may vary depending on the location of the object or the position of the observer.

[0144] Although preferred embodiments of the present invention have been described in detail above, the scope of the present invention is not limited thereto, and various modifications and improvements by those skilled in the art using the basic concept of the present invention as defined in the following claims also fall within the scope of the present invention.

[0145] Explanation of the symbols

[0146] 100: Battery assembly

[0147] 110: Battery cell

[0148] 120: Battery cell stack

[0149] 130: Battery Assembly Frame

[0150] 140: Battery cell cover

[0151] 141: Discharge section

[0152] 141a: First curve

[0153] 141b: Second curve

[0154] 142: Rupture hole

[0155] 150: Battery assembly cover

[0156] 160: Adhesive

[0157] 170: Cell spacer

[0158] 171: Euro Hall

Claims

1. Multiple battery cells; A battery assembly frame that accommodates the battery cells and covers at least a portion of the battery cells; A battery cell cover covering one side of the above battery cells; and Includes a refrigerant circulating inside the battery assembly frame; and A battery assembly having a venting space provided between the battery cell cover and one side of the battery assembly frame.

2. In Paragraph 1, The above battery cell cover is a battery assembly having a material that ruptures at a pressure above a certain level.

3. In Paragraph 1, The battery assembly, wherein the battery cell cover includes an exhaust portion that ruptures at a pressure above a certain level.

4. In Paragraph 1, A battery assembly in which venting gas generated from the battery cell ruptures the battery cell cover and is discharged into the venting space.

5. In Paragraph 1, A battery assembly in which the battery cell cover melts due to the venting gas generated from the battery cell, and the venting gas is discharged into the venting space.

6. In Paragraph 1, The above discharge section is a plurality of individual battery assemblies.

7. In Paragraph 1, A battery assembly having adhesive portions applied thereto provided between the battery cell cover and one side of the battery assembly frame.

8. In Paragraph 7, A battery assembly in which the space between the above adhesive portions is the venting space.

9. In Paragraph 1, A battery assembly having at least one cell spacer located at least one location among the plurality of battery cells.

10. In Paragraph 9, Adhesive portions with adhesive applied are provided between the battery cell cover and one side of the battery assembly frame, and The above adhesive portion is positioned to correspond to the upper portion of the cell spacer, in a battery assembly.

11. In Paragraph 10, The above battery cells are stacked along one direction, and A battery assembly in which one adhesive portion corresponds to one cell spacer based on a direction perpendicular to the direction in which the above battery cells are stacked.

12. In Paragraph 9, A battery assembly in which the cell spacer comprises a plurality of Euro holes drilled along the direction of the wider side of the battery cell.

13. In Paragraph 12, A battery assembly in which the refrigerant can move through the plurality of Euro holes.

14. In Paragraph 1, The above battery cell cover includes an exhaust portion which is a part that ruptures at a pressure above a certain level, and The above discharge section includes a first curve and a second curve, and A battery assembly comprising a plurality of rupture holes, wherein the first curve and the second curve are a plurality of rupture holes.

15. In Paragraph 14, A battery assembly in which the first curve and the second curve are symmetrical to each other.

16. In Paragraph 14, A battery assembly in which the first curve and the second curve meet at two points.

17. In Paragraph 1, The above battery cell cover includes an exhaust portion which is a part that ruptures at a pressure above a certain level, and The above discharge portion is a battery assembly in which notches, boundary portions having thickness differences, or a plurality of holes are formed.

18. In Paragraph 1, A battery assembly in which the above refrigerant is in contact with at least some of the battery cells and flows inside the battery assembly frame.

19. A device comprising a battery assembly according to paragraph 1.

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