Battery cell and battery pack

Abstract

The utility model relates to the technical field of battery manufacturing provides a kind of battery monomer and battery package, including shell and cover plate;Cover plate and shell fixed connection;Wherein, at least two interval settings support boss and at least one explosion-proof valve are equipped on cover plate;Support boss is protruded from cover plate to the side away from shell, and the end of support boss is formed with contact plane;At least two support bosses are arranged along the length direction of cover plate;Explosion-proof valve is located between the two support bosses adjacent in the length direction of cover plate.The utility model is by setting the structure of support boss, realize the support to structural member on battery package, improve the stability and security of battery monomer structure.Further, by setting explosion-proof valve between support boss, this can be when battery thermal runaway, the unobstructedness of position pressure relief passage, improve the safety performance of battery.

Description

Technical Field

[0001] This utility model relates to the technical field of battery manufacturing, and in particular to a battery cell and battery pack. Background Technology

[0002] A power battery is a rechargeable battery used to power devices such as electric vehicles, primarily by storing and releasing electrical energy to drive an electric motor.

[0003] In existing technologies, the highest point of a single battery cell is typically located on the terminal post of the cover plate. To ensure sufficient safety performance, individual battery cells within the battery pack are generally protected from excessive external forces, a design that helps prevent damage to the internal battery structure. However, this design also results in lower overall strength of the battery pack, potentially affecting its stability and safety under external impacts or pressure. Furthermore, when the battery pack is installed upside down, the explosion-proof valve faces downwards, making its external pressure relief channel prone to blockage in the event of battery thermal runaway, posing a significant safety hazard. Utility Model Content

[0004] This invention provides a battery cell and a battery pack to address the shortcomings of existing batteries, such as poor structural stability and safety, and high safety risks during thermal runaway.

[0005] This utility model provides a battery cell, including: a housing and a cover plate; the cover plate is fixedly connected to the housing; wherein, the cover plate is provided with at least two spaced-apart support protrusions and at least one explosion-proof valve; the support protrusions protrude from the cover plate toward the side away from the housing, and the end of the support protrusion forms a contact plane; at least two of the support protrusions are arranged at intervals along the length direction of the cover plate; the explosion-proof valve is located between two adjacent support protrusions in the length direction of the cover plate.

[0006] The battery cell according to this utility model also includes a terminal post, which is disposed on the cover plate and is arranged adjacent to the support boss.

[0007] According to the battery cell of this utility model, the terminal post includes a positive terminal and a negative terminal. Along the length direction of the cover plate, the positive terminal and the negative terminal are spaced apart and located between adjacent support bosses.

[0008] According to the battery cell of this utility model, the explosion-proof valve is located in the gap between the positive terminal and the negative terminal.

[0009] According to the battery cell of this utility model, in the length direction of the cover plate, the explosion-proof valve is disposed in the middle of the cover plate, and the support boss is disposed between the electrode post and the explosion-proof valve.

[0010] According to the battery cell of this utility model, along the width direction of the cover plate, the width of the supporting boss is greater than the width of the electrode post.

[0011] According to the present invention, in the width direction of the cover plate, the outer surface of the supporting boss in the width direction is coplanar with the outer surface of the housing in the width direction.

[0012] According to the present invention, in the thickness direction of the cover plate, the outer surface of the electrode post in the thickness direction is lower than the contact plane.

[0013] According to the battery cell of this utility model, the supporting boss and the cover plate are integrally formed.

[0014] This utility model also provides a battery pack, including: a shell and a plurality of battery cells as described in any of the above claims, wherein the battery cells are disposed inside the shell and the contact plane on the support boss is connected to the structural component; wherein, in the thickness direction of the battery pack, at least one side of each battery cell is provided with a liquid cooling plate.

[0015] The battery cell and battery pack provided by this utility model feature a supporting boss structure on the battery cell, which supports the structural components of the battery pack, thereby improving the stability and safety of the battery cell structure. Furthermore, by placing an explosion-proof valve between the supporting bosses, the pressure relief channel is kept open in the event of battery thermal runaway, improving the battery's safety performance. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0017] Figure 1 This is one of the overall structural schematic diagrams of the battery cell provided by this utility model.

[0018] Figure 2 This is one of the schematic diagrams of a battery pack with the battery cells in Embodiment 1 provided by this utility model.

[0019] Figure 3 This is the second schematic diagram of a battery pack with the battery cells in Embodiment 1 provided by this utility model.

[0020] Figure 4 This is a schematic diagram of the overall structure of the battery cell provided in Embodiment 2 of this utility model.

[0021] Figure 5 This is one of the schematic diagrams of a battery pack structure with the battery cells in Embodiment 2 provided by this utility model.

[0022] Figure 6 This is the second schematic diagram of the battery pack structure with the battery cells in Embodiment 2 provided by this utility model.

[0023] Figure label: 10. Battery cell; 11. Housing; 12. Cover plate; 121. Support boss; 1211. Contact plane; 13. Terminal post; 131. Positive terminal; 132. Negative terminal; 14. Explosion-proof valve; 20. Battery pack; 21. Structural component; 22. Liquid cooling plate. Detailed Implementation

[0024] To make the objectives, technical solutions, and advantages of this utility model clearer, the technical solutions of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0025] In the description of the embodiments of this utility model, it should be noted that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings. They are only for the purpose of clarifying the embodiments of this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the embodiments of this utility model. In addition, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0026] In the description of the embodiments of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "connected" and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; 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. Those skilled in the art can understand the specific meaning of the above terms in the embodiments of this utility model according to the specific circumstances.

[0027] In this embodiment of the utility model, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is 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 can mean that the first feature is 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.

[0028] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0029] In related technologies, battery covers are typically elongated plate-like structures with terminals mounted on them. These terminals are usually positioned as the highest points of individual battery cells. While this design helps prevent damage to the internal battery structure, it also results in lower overall battery pack strength, limiting cell stability and safety. Furthermore, the limited internal space of the casing poses a significant safety risk, especially when the battery pack is installed upside down. If thermal runaway occurs inside the battery, the unstable support of individual cells can block the leakage channels of the explosion-proof valve, exacerbating the safety hazard.

[0030] To address the issues in the relevant technologies, the following will be discussed in conjunction with... Figures 1-6The present invention provides a battery cell 10, comprising a housing 11 and a cover plate 12; the cover plate 12 is fixedly connected to the housing 11; wherein the cover plate 12 is provided with at least two spaced-apart support protrusions 121 and at least one explosion-proof valve 14; the support protrusions 121 protrude from the cover plate 12 toward the side away from the housing 11, and the end of the support protrusion 121 forms a contact plane 1211; at least two support protrusions 121 are arranged at intervals along the length direction of the cover plate 12; the explosion-proof valve 14 is located between two adjacent support protrusions 121 in the length direction of the cover plate 12. Individual cells are combined in parallel and series to form an overall battery pack 20 structure. When the battery pack 20 is subjected to external impact or pressure, the force is transmitted to the cover plate 12 of each individual cell, thereby applying a certain impact force or force to the cover plate 12. This will affect the stability and safety of the battery cell 10 structure. In this embodiment, by setting an individual support boss 121 on the cover plate 12, the support boss 121 can contact the structural component 21 on the battery pack 20, thereby bearing pressure through the support boss 121, improving the stability and safety of the overall battery structure. Furthermore, by setting the explosion-proof valve 14 between adjacent support bosses 121, the support bosses 121 can strengthen the structural strength on both sides of the explosion-proof valve 14, so that it forms a stable pressure relief channel in the space corresponding to the explosion-proof valve 14, avoiding the blockage of the pressure relief channel of the explosion-proof valve 14 when the battery thermally runs away, thus improving the safety of the battery.

[0031] Specifically, the cover plate 12 is constructed as a long strip-shaped plate structure. A supporting boss 121 is formed on the surface of the cover plate 12 away from the housing 11, protruding in a direction away from the housing 11. The protruding end face serves as a contact plane 1211, contacting the structural component 21 on the battery pack 20 to bear external forces, thus improving the overall structural strength. For example, a liquid cooling plate 22 is provided on the battery pack 20 to manage the internal temperature. The liquid cooling plate 22 contacts the contact plane 1211, providing support for both the liquid cooling plate 22 and the structural component 21. This design allows the battery pack 20 to withstand external impacts through the supporting boss 121, improving its overall pressure resistance and enhancing its structural stability and safety performance.

[0032] Furthermore, the area of ​​the supporting boss 121 has a local reinforcement effect, and the explosion-proof valve 14 is located between the supporting bosses 121. This enables the explosion-proof valve 14 to have higher stability, and in the event of thermal runaway, it can form a stable pressure relief channel through the raised structure to achieve rapid pressure relief and improve the safety performance of the battery.

[0033] The support boss 121 is a raised solid structure made of the same material as the cover plate 12. The interior of the protruding portion of the support boss 121 is hollow, forming a recessed area. When the cover plate 12 is installed on the battery casing, one side of the recessed area faces the assembly space inside the casing 11, thus providing more space for electrolyte and increasing the electrolyte injection volume. Alternatively, the protruding portion of the support boss 121 can be solid, providing stable support against external forces and improving the overall structural stability.

[0034] Understandably, in conventional cell cover plate 12 structures, the pole post 13 often serves as a support structure on the surface of the cover plate 12 away from the housing 11 to support the structural component 21. That is, the outer surface of the pole post 13 is the highest protruding part. This results in poor structural stability of the battery pack 20 under external impact, making it prone to structural damage and thus reducing battery safety performance. This embodiment addresses this by separately providing a support boss 121. The contact plane 1211 on the support boss 121 contacts the structural component 21 on the battery pack 20, thereby enabling it to withstand external impacts and improving the stability and safety of the battery structure. Furthermore, by placing the explosion-proof valve 14 between adjacent support bosses 121, the explosion-proof valve 14 is effectively protected, maintaining its effectiveness and improving overall structural stability.

[0035] In this embodiment, the number of supporting bosses 121 is not limited, and they can be two or more protruding structures. For example, when there are two supporting bosses 121, such as... Figure 4 As shown, the support boss 121 is a long, rectangular block. The surface of the support boss 121 protruding away from the housing 11 serves as a contact plane 1211. The contact plane 1211 can contact the structural member 21 on the battery pack 20, thereby effectively supporting external impacts or forces. Of course, there can be more than two support bosses 121, and two or more support bosses 121 can be arranged on the cover plate 12 in the manner described above.

[0036] Furthermore, this embodiment does not limit the shape of the support boss 121. It can be a block-shaped support boss 121, a cylindrical support boss 121, or a frustum-shaped or irregular frustum-shaped structure, etc. For ease of understanding and explanation, this embodiment and subsequent embodiments use a block-shaped support boss 121 as an example for illustration, such as... Figure 1 , Figure 4 As shown.

[0037] In some embodiments, the support boss 121 is integrally formed with the cover plate 12. This integral forming creates a support boss 121 protruding from the cover plate 12 on the surface of the cover plate 12 away from the housing 11, thereby enabling it to withstand external impacts or forces. Furthermore, the integral forming design improves the overall structural stability.

[0038] Specifically, the support boss 121 is integrally formed by stamping, and during stamping, a hollow receiving groove is formed on the surface of the cover plate 12 body facing the inside of the housing 11. The receiving groove is located in the area corresponding to the support boss 121, and the receiving groove can increase the capacity of the electrolyte inside the housing 11.

[0039] It is understandable that in conventional designs, the support boss 121 can be formed by welding or other connection methods. In this embodiment, the integral molding method can improve the structural strength of the support boss 121 and the cover plate 12, and enhance the overall structural stability of the cover plate 12.

[0040] In some embodiments, the battery cell 10 further includes a terminal post 13, which is disposed on the cover plate 12 and adjacent to the support boss 121. The terminal post 13 is used to enable charging and discharging. In this embodiment, by arranging the support boss 121 adjacent to the terminal post 13, the structural stability of the terminal post 13 connection can be improved.

[0041] Specifically, the support boss 121 can play a role in structural reinforcement of this part of the area. In this embodiment, the pole post 13 is arranged adjacent to the support boss 121, thereby achieving structural reinforcement of the connection position of the pole post 13 and improving the structural strength and structural stability of the pole post 13.

[0042] In specific configuration, the pole post 13 can be positioned on one side of the support boss 121 or between adjacent support bosses 121, as long as the position of the pole post 13 is adjacent to the support boss 121. By using an adjacent arrangement, the support boss 121 strengthens the structural position of the pole post 13, thereby improving the overall stability of the cover plate 12.

[0043] In conjunction with the above embodiments, along the width direction of the cover plate 12, the width of the support boss 121 is greater than the width of the pole post 13. By limiting the width of the support boss 121 to be greater than that of the pole post 13, the support boss 121 bears load more evenly, thereby improving the stability of the overall structure.

[0044] The width of the support boss 121 is greater than the width of the electrode post 13 surface, and the total area of ​​the contact planes 1211 on the two or more support bosses 121 is greater than the total area of ​​the electrode post 13 surface. This allows the contact planes 1211 on the support bosses 121 to contact the structural members 21 on the battery pack 20 in the width direction to be larger, making the force more uniform.

[0045] Specifically, when both the supporting boss 121 and the pole post 13 are block-shaped structures, the width of the supporting boss 121 is greater than that of the pole post 13 along the width direction of the cover plate 12. When both the supporting boss 121 and the pole post 13 are cylindrical structures, the radial width of the supporting boss 121 is greater than that of the pole post 13 along the width direction of the cover plate 12. This allows the supporting boss 121 to have a larger contact area when under pressure, making the force more dispersed and avoiding stress concentration that could lead to structural damage.

[0046] Understandably, by limiting the width of the support boss 121 to be greater than the width of the surface of the pole post 13, it is possible to distribute the force more evenly, thus avoiding stress concentration.

[0047] In conjunction with the above embodiments, the outer surface of the support boss 121 in the width direction is coplanar with the outer surface of the housing 11 in the width direction. By limiting the width of the outer surface of the support boss 121 to be coplanar with the outer surface of the housing 11, the support boss 121 has a larger contact area, thereby achieving effective support for the structural member 21 and further improving the stability of the support.

[0048] Specifically, under external impact or force, the support boss 121 bears the pressure, and part of the pressure is transmitted to the outer surface of the shell 11 through the coplanar outer side, thereby effectively dispersing the force, avoiding stress concentration, and improving the overall stability.

[0049] Furthermore, by defining the coplanarity of the outer surfaces between the supporting boss 121 and the housing 11, rapid inspection of assembly quality can be facilitated. That is, corresponding tooling or calibration devices can be used to check whether the outer surfaces are coplanar, and the assembly qualification can be determined based on the inspection results. For example, during inspection, other existing mold inspection methods can be used. If the outer surfaces on both sides are coplanar, it indicates proper assembly and the product is qualified. If either outer surface is not coplanar, the assembly is unqualified. This achieves efficient and rapid self-inspection, improves product quality, and enriches calibration methods.

[0050] In some embodiments, along the thickness direction of the cover plate 12, the surface of the terminal post 13 facing the first side is lower than the contact plane 1211. In the battery pack 20 structure, the structural members 21 (such as the liquid cooling plate 22) on the battery pack 20 contact the highest protruding portion on the cover plate 12 body to achieve pressure resistance. This embodiment, by limiting the surface of the terminal post 13 to be lower than the contact plane 121, can effectively bear pressure through the supporting boss 121, thereby improving the stability of the overall battery structure.

[0051] Specifically, along the thickness direction of the cover plate 12, the surface of the pole post 13 facing the first side is lower than the contact surface. This allows the pole post 13 to make contact and bear force through the contact plane 1211 when it comes into contact with the structural component 21 on the battery pack 20, while the pole post 13 is not affected by external forces, thereby improving the stability of the overall structure.

[0052] It is understandable that in both of the above methods, the contact surface on the support boss 121 is used to achieve contact and load bearing with the structural component 21 on the battery pack 20. The load bearing of the support boss 121 can improve the stability and impact resistance of the overall structure, avoid the impact of external impact on the internal structure of the battery, and improve the safety of the battery.

[0053] In some embodiments, such as Figure 1 As shown, the pole post 13 includes a positive terminal 131 and a negative terminal 132. Along the length of the cover plate 12, the positive terminal 131 and the negative terminal 132 are spaced apart and located between adjacent support bosses 121.

[0054] Specifically, the explosion-proof valve 14 is typically used to prevent safety issues caused by excessive internal pressure. Its position between the support bosses 121, and further between the positive and negative terminals 131 and 132, helps to evenly distribute internal pressure. The support bosses 121 are located on both sides of the explosion-proof valve 14 along its length, helping to reinforce both sides of the cover plate 12, forming a symmetrical reinforcement design. This effectively disperses stress generated by internal pressure or external impact, reduces local stress concentration, and thus improves the overall structural stability. Furthermore, the explosion-proof valve 14 typically bears significant pressure, making the areas on either side of it weak points in the cover plate 12. By providing the pole post 13 structure and the support bosses 121 on both sides of the explosion-proof valve 14, the structural strength of these weak areas can be effectively enhanced, increasing the load-bearing capacity of the cover plate 12 and reducing the risk of excessive deformation or localized failure.

[0055] In conjunction with the above embodiments, the explosion-proof valve 14 is located in the gap between the positive terminal 131 and the negative terminal 132.

[0056] Furthermore, by placing the support bosses 121 on both sides of the explosion-proof valve 14, the shape of the cover plate 12 becomes more reasonable and symmetrical, while avoiding the waste of space near the explosion-proof valve 14. In terms of design, this method effectively utilizes space and makes the cover plate 12 more aesthetically pleasing. Moreover, the explosion-proof valve 14 is further located between the positive terminal 131 and the negative terminal 132, both of which protrude towards the side of the cover plate 12 away from the housing 11, thereby further providing maintenance for the pressure relief channel and preventing blockage. In other words, this embodiment maintains the pressure relief channel not only through the support bosses 121 but also through the positive and negative terminals 131 and 132, effectively reducing the risk caused by excessive deformation or localized failure.

[0057] In other words, the layout design of the explosion-proof valve 14 and the supporting boss 121 can not only improve the structural strength of the cover plate 12, but also effectively improve the functionality and safety of the explosion-proof valve 14, ensuring that the cover plate 12 can better protect the internal equipment and avoid accidents when subjected to high pressure or external impact.

[0058] In some embodiments, such as Figure 4 As shown, in the length direction of the cover plate 12, the explosion-proof valve 14 is located in the middle of the cover plate 12, and the support boss 121 is located between the pole post 13 and the explosion-proof valve 14.

[0059] Specifically, along the length of the cover plate 12, the positive terminal 131 and the negative terminal 132 are respectively located at both ends of the cover plate 12. Multiple support protrusions 121 are located between the terminals 13 at both ends, and a corresponding explosion-proof valve 14 is also located between the support protrusions 121. By placing multiple protrusions between the terminals 13, the overall strength, stability, impact resistance, and thermal management performance of the cover plate 12 are enhanced, thereby ensuring higher safety and reliability of the battery during use. Figure 1 As shown, two support bosses 121 are provided, which are located on both sides of the explosion-proof valve 14 in the middle, so as to maintain the pressure relief channel.

[0060] Understandably, placing the positive and negative terminals 132 at both ends of the cover plate 12 ensures the stability of the battery's internal structure. Since the positive terminal 131 and negative terminal 132 are the main electrical connection components of the battery, fixing them at both ends of the cover plate 12 provides better structural support. The support bosses 121 located between the terminals 13 at both ends further enhance the overall rigidity and stability of the cover plate 12, preventing deformation or breakage under external forces. When the terminals 13 are located at both ends of the cover plate 12, stress concentration typically occurs. By setting multiple support bosses 121 between the terminals 13, these stresses can be effectively dispersed, preventing excessive stress accumulation in the middle of the cover plate 12, thereby avoiding localized deformation or damage during long-term use. This helps improve the durability and structural reliability of the cover plate 12.

[0061] Furthermore, two support bosses 121 are provided between the pole posts 13, which makes the strength distribution of the cover plate 12 body more uniform. This design can effectively utilize the compressive strength of the material, reduce possible weak areas, and in particular, prevent the middle of the cover plate 12 from cracking due to large pressure or impact.

[0062] In conjunction with the above embodiments, along the length of the cover plate 12, the distance between the pole posts 13 at both ends and the adjacent support bosses 121 is equal. By limiting the distance between the pole posts 13 and the support bosses 121, the force is more evenly distributed, and the overall structural stability is further improved.

[0063] Specifically, such as Figure 1 , Figure 4 As shown, the cover plate 12 is provided with a positive terminal 131 and a negative terminal 132. A first protrusion and a second protrusion are respectively located adjacent to the positive terminal 131 and the negative terminal 132. The protrusion height of the first protrusion is the same as that of the second protrusion. The first protrusion is adjacent to the positive terminal 131, and the second protrusion is adjacent to the negative terminal 132. The distance between the positive terminal 131 and the first protrusion is equal to the distance between the second protrusion and the negative terminal 132. This optimizes the stress distribution, making the stress more uniform when subjected to external forces.

[0064] It is understandable that, such as Figures 4-6As shown, when the distance between the poles 13 at both ends (positive end 131 and negative end 132) and the adjacent support bosses 121 is equal, the structure of the cover plate 12 can maintain a more uniform stress distribution under stress. This design can effectively avoid local stress concentration, thereby reducing the risk of bending or deformation of the cover plate 12 and improving the stability and durability of the overall structure. Furthermore, the equal spacing makes the entire cover plate 12 structure more symmetrical, which helps to improve the overall strength of the cover plate 12. The symmetrical structure allows the cover plate 12 to respond more harmoniously to external impacts or internal pressures, reducing structural imbalance or local damage caused by asymmetrical design.

[0065] Furthermore, when the spacing is uniform, each part of the cover plate 12 can achieve a more even heat distribution. This helps to improve heat conduction efficiency, avoid local overheating or uneven cooling, ensure that the battery maintains a more stable temperature during operation, effectively extend battery life, and improve safety.

[0066] This utility model also provides a battery pack 20, such as Figure 2 , Figure 3 , Figure 5 , Figure 6 As shown, the battery pack 20 includes a housing and a plurality of battery cells 10 as provided in any of the above embodiments. The battery cells 10 are disposed inside the housing, and the contact plane 1211 on the support boss 121 is connected to the structural member 21. In the thickness direction of the battery pack 20, at least one side of each battery cell 10 is provided with a liquid cooling plate 22.

[0067] Specifically, the liquid cooling plate 22 can be disposed on either side of the thickness direction of the battery pack 20, such as... Figure 2 , Figure 5 As shown, it can be located on the side of the battery pack 20 away from the cover plate 12. That is, the cover plate 12 on the battery cell 10 is connected to the structural component 21 by means of adhesive bonding or snap-fit, while the liquid cooling plate 22 is located on the other side opposite to the cover plate 12, thereby achieving temperature control inside the battery pack 20. Of course, it can also be as follows: Figure 3 As shown, the liquid cooling plate 22 is located on the side near the cover plate 12. That is, the cover plate 12 and the structural component 21 are connected by means of adhesive or snap-fit, and the liquid cooling plate 22 is provided on the side of the structural component 21 away from the battery cell 10. In order to facilitate the normal pressure relief of the explosion-proof valve 14 on the cover plate 12, a pressure relief structure (such as a pressure relief structure or a hollow structure) can be provided on the liquid cooling plate 22, and the pressure relief structure is directly opposite the explosion-proof valve 14.

[0068] Of course, it can also be like... Figure 6As shown, liquid cooling plates 22 are provided on both sides of the battery pack 20 in the thickness direction, thereby controlling the internal temperature of the battery pack 20. Similarly, in a specific configuration, the liquid cooling plate 22 on the side near the cover plate 12 is provided with a pressure relief structure (such as a pressure relief structure or a hollow structure), which is directly opposite the explosion-proof valve 14, thereby facilitating the normal pressure relief of the explosion-proof valve 14 on the cover plate 12.

[0069] The battery pack 20 provided in this example has a battery cell 10 of any of the aforementioned embodiments. Therefore, the battery pack 20 in this example has the characteristic effects of each of the aforementioned battery cells 10. To avoid redundancy in the description of the effects, they will not be repeated here.

[0070] Through the above description of the embodiments, those skilled in the art can clearly understand that each embodiment, by setting the structure of the support boss 121, achieves support for the structural component 21 on the battery pack 20, thereby improving the stability and safety of the battery cell 10 structure. Furthermore, by placing the explosion-proof valve 14 between the support bosses 121, the pressure relief channel can be kept unobstructed in the event of battery thermal runaway, thus improving the battery's safety performance.

[0071] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and not to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model.

Claims

1. A battery cell, characterized in that, include: case; The cover plate is fixedly connected to the housing. The cover plate is provided with at least two spaced-apart support bosses and at least one explosion-proof valve; the support bosses protrude from the cover plate toward the side away from the housing, and the ends of the support bosses form contact planes; At least two of the support bosses are spaced apart along the length of the cover plate; the explosion-proof valve is located between two adjacent support bosses along the length of the cover plate.

2. The battery cell according to claim 1, characterized in that, It also includes a pole post, which is disposed on the cover plate and is arranged adjacent to the support boss.

3. The battery cell according to claim 2, characterized in that, The pole includes a positive terminal and a negative terminal, which are spaced apart along the length of the cover plate and located between adjacent support bosses.

4. The battery cell according to claim 3, characterized in that, The explosion-proof valve is located in the gap between the positive terminal and the negative terminal.

5. The battery cell according to claim 2, characterized in that, Along the length of the cover plate, the explosion-proof valve is located in the middle of the cover plate, and the support boss is located between the pole and the explosion-proof valve.

6. The battery cell according to claim 2, characterized in that, Along the width direction of the cover plate, the width of the support boss is greater than the width of the pole post.

7. The battery cell according to claim 2, characterized in that, In the width direction of the cover plate, the outer surface of the support boss in the width direction is coplanar with the outer surface of the housing in the width direction.

8. The battery cell according to claim 2, characterized in that, In the thickness direction of the cover plate, the outer surface of the pole is lower than the contact plane.

9. The battery cell according to claim 1, characterized in that, The support boss is integrally formed with the cover plate.

10. A battery pack, characterized in that, include: shell; The battery cell according to any one of claims 1-9, wherein the battery cell is disposed inside the housing, and the contact plane on the support boss is connected to the structural component; In the thickness direction of the battery pack, at least one side of each battery cell is provided with a liquid cooling plate.

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