Battery module and energy storage equipment

Abstract

The invention discloses a battery module and energy storage equipment, and belongs to the technical field of batteries. The battery module comprises a supporting seat, the supporting seat is provided with a positioning hole and a supporting arm, the supporting arm is of a cantilever structure with one end connected with the supporting seat and the other end being a free end, and the supporting arm corresponds to the positioning hole; the battery cell is provided with a first end and a second end which are arranged back to back, the first end of the battery cell extends into the positioning hole, the end part of the first end of the battery cell is propped against the supporting arm, and the second end of the battery cell is provided with an electrode; the fixing seat is arranged on one side, back to the supporting seat, of the battery cell, the fixing seat is connected with the supporting seat, and the fixing seat is used for fixing the second end of the battery cell. According to the battery module, the battery cell can be supported by the resilience force of the supporting arm, so that the load bearing of the electric connecting piece on the battery cell is reduced, and the problem that the electric connecting piece is easy to break and damage due to overlarge stress is solved.

Description

Technical Field

[0001] This application belongs to the field of battery technology, specifically relating to a battery module and an energy storage device. Background Technology

[0002] In related technologies, the electrodes of the battery cell are generally welded to electrical connectors. Because the battery cell has a certain range of height tolerance, after the electrodes of the battery cell are welded to the electrical connectors, the end of the battery cell away from the electrodes may be in a suspended state. As a result, the weight of the battery cell is mainly borne by the electrical connectors. During transportation, the electrical connectors are prone to breakage due to excessive stress. Summary of the Invention

[0003] In view of this, the embodiments of this application aim to provide a battery module and energy storage device to solve the problem that electrical connectors are prone to breakage due to excessive force.

[0004] The first aspect of this application proposes a battery module, comprising: a support base, on which a positioning hole and a support arm are provided, the support arm being a cantilever structure with one end connected to the support base and the other end being a free end, the support arm corresponding to the positioning hole; a battery cell, the battery cell having a first end and a second end disposed back to back, the first end of the battery cell extending into the positioning hole and the end of the first end of the battery cell abutting against the support arm, the second end of the battery cell being provided with an electrode; and a fixing base, disposed on the side of the battery cell facing away from the support base, the fixing base being connected to the support base, the fixing base fixing the second end of the battery cell.

[0005] In the above technical solution, by setting up a cantilevered support arm, the elastic properties of the support arm allow it to interact with the battery cell through slight bending at its free end. Furthermore, the rebound force of the support arm provides upward support to the battery cell, thereby distributing the cell's weight across the support arm and electrical connectors, reducing the burden on the connectors. This combination reduces the risk of connector breakage, thus extending the battery module's lifespan.

[0006] In some technical solutions, optionally, the same positioning hole corresponds to multiple support arms, and the first end of the battery cell abuts against multiple support arms.

[0007] In the above technical solution, on the one hand, multiple support arms share the weight of the first end of the battery cell. Compared to a single support arm, this distributes the weight of the battery cell across all the support arms, reducing the force on each support arm and thus reducing the deformation of a single support arm. This lowers the risk of excessive deformation or even damage to a single support arm due to excessive force, thereby improving the reliability and durability of the support arms. On the other hand, multiple support arms also increase the number of support points for the battery cell, making the battery cell more stable on the support base.

[0008] In some technical solutions, optionally, multiple support arms corresponding to the same positioning hole are distributed in a spoke-like manner based on the center of the positioning hole, with the end of the support arm closest to the center of the positioning hole being the free end.

[0009] In the above technical solution, when the first end of the battery cell abuts against the support arm, the weight of the battery cell can be evenly distributed to each support arm, thereby reducing the risk of fatigue fracture of the support arm. At the same time, there are certain gaps between the multiple support arms, which can serve as channels for airflow.

[0010] In some technical solutions, optionally, a first protrusion is provided on the support arm, the first protrusion being provided in a direction facing away from the battery cell, the first protrusion being used to abut against the housing to limit the deformation of the support arm.

[0011] In the above technical solution, by setting the first protrusion to limit the maximum deformation of the support arm, the spacing between the battery cell and the casing can be arranged more flexibly.

[0012] In some technical solutions, optionally, a protrusion is provided on the side of the support arm facing the battery cell, and the end of the first end of the battery cell abuts against the protrusion.

[0013] In the above technical solution, during assembly, the weight of the battery cell is initially concentrated on the top of the convex bulge. Subsequently, the shape of the convex bulge gradually disperses the stress to a larger area of ​​the support arm, thereby reducing the risk of damage to the support arm caused by excessive local stress. At the same time, the convex bulge is equivalent to adding a local reinforcing structure to the support arm, which can resist bending and deformation caused by the pressure of the battery cell, thus helping to improve the overall load-bearing capacity of the support arm.

[0014] In some technical solutions, optionally, based on the case where multiple support arms correspond to the same positioning hole, multiple protrusions are arranged in a circular array, and the end of the first end of the battery cell has a concave or convex portion, with the multiple protrusions abutting against the concave or convex portion; or based on the case where multiple support arms correspond to the same positioning hole, multiple protrusions are arranged circumferentially at intervals, and the surface of each protrusion is provided with a first guide adapter surface, the first guide adapter surface including a slope and / or an arc surface, and the end of the first end of the battery cell has a second guide adapter surface that adapts to the first guide adapter surface.

[0015] In the above technical solution, since the convex bulges are uniformly distributed circumferentially, the contact point between the convex bulges and the cell will change relatively when there is a deviation in the cell diameter. For cells with a larger diameter, the convex bulges will generate a component force from the center outward when in contact with the cell. This component force will cause the cell to be pushed outward, thus "spreading" the cell in the circumferential direction, thereby better fitting with the surrounding structure and eliminating gaps that may be caused by the excessive diameter. For cells with a smaller diameter, the cell can be kept in a relatively stable position and will not wobble due to the small diameter. At the same time, the concave or convex part at the first end of the cell cooperates with the convex bulges on the support arm. The convex bulges will be stuck at a specific position of the concave or convex part, thereby restricting the rotational freedom of the cell around its own axis and keeping the cell's position in the battery module stable.

[0016] In addition, the concave or convex part at the first end of the battery cell cooperates with the convex bulge on the support arm. The convex bulge will be stuck in a specific position of the concave or convex part, thereby restricting the rotational freedom of the battery cell around its own axis, so that the position of the battery cell in the battery module can be kept stable.

[0017] In some technical solutions, the support arm and the support base are optionally integrally formed; or the support base is detachably mounted with a support part, and the support arm is part of the support part.

[0018] In the above technical solution, the integrated molding makes the support arm and support base a single structure, eliminating the connection gaps or weak points that may exist in traditional assembly structures. This allows for better stress distribution, avoiding structural damage caused by localized stress concentration, and thus improving the structural strength and stability of the entire battery module. Furthermore, designing the support base and support arm as two detachable parts enables the support arm to be used immediately to meet the needs of the same type of battery cell, without requiring the replacement of the entire support base.

[0019] In some technical solutions, the support arm can optionally be a temperature-sensitive elastomer; within a temperature range of -30℃ to 80℃, the change in the elastic modulus of the support arm is greater than or equal to 0 and less than or equal to 15%.

[0020] This reduces the fluctuation of the elastic performance of the support arm in low or high temperature environments, making the support force of the support arm on the battery cell relatively stable at different temperatures.

[0021] In some technical solutions, optionally, a first connecting post extending toward a fixed seat is provided on the support base, and a second connecting post extending toward the support base is provided on the fixed seat. A connecting groove is provided on one end of the first connecting post and the end of the second connecting post, and a connecting protrusion is provided on the other end. The height of the connecting protrusion is greater than the depth of the connecting groove, and the connecting protrusion extends into the connecting groove. Both the top of the connecting protrusion and the bottom wall of the connecting groove are provided with through holes for fasteners to pass through, so that the connecting protrusion and the connecting groove are connected and fixed by fasteners.

[0022] In the above technical solution, during assembly, the connecting protrusion extends into the connecting groove, thereby achieving initial positioning and limiting wobbling. On the one hand, this improves the stability of the connection, and on the other hand, it also improves assembly efficiency. Fasteners pass through the connecting protrusion and the connecting groove, connecting and fixing the first and second connecting posts, thus forming an integral frame between the support base and the fixed base.

[0023] The second aspect of this application proposes an energy storage device, including a housing and a battery module as described in any of the above-mentioned technical solutions, wherein the battery module is located within the housing. Therefore, the energy storage device possesses all the beneficial effects of any of the above-mentioned technical solutions, which will not be elaborated further here.

[0024] In some technical solutions, the support base is optionally disposed opposite to the inner wall of the housing, and the inner wall of the housing abuts against the support arm to limit the deformation of the support arm.

[0025] In the above technical solution, by controlling the deformation of the support arm within a safe range, the risk of the support arm breaking or failing due to excessive deformation can be reduced, thereby enabling the entire battery module structure to remain stable.

[0026] In some technical solutions, optionally, a second protrusion is provided on the inner wall, the second protrusion protruding toward the support arm, the second protrusion being used to abut against the support arm to limit the deformation of the support arm.

[0027] In the above technical solution, by setting a second protrusion, the spacing between the battery cell and the casing can be arranged more flexibly.

[0028] In some technical solutions, the second protrusion is optionally arranged in a ring shape, and multiple support arms corresponding to the same positioning hole are arranged at intervals along the circumference of the second protrusion. The second protrusion corresponds to multiple support arms and is used to abut against multiple support arms to limit the deformation of multiple support arms.

[0029] In the above technical solution, compared to multiple dispersed second protrusions, the annular second protrusion is easier to design and manufacture. During the design and processing of the shell, there is no need to consider layout and fit issues. Furthermore, when multiple support arms deform and abut against the annular second protrusion, the annular structure can evenly distribute the force transmitted from the support arms around the shell, which helps improve the overall stability of the shell.

[0030] Additional aspects and advantages of this application will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of this application. Attached Figure Description

[0031] The above and / or additional aspects and advantages of this application will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:

[0032] Figure 1 This is one of the structural schematic diagrams of the battery module in some embodiments of this application;

[0033] Figure 2 These are schematic diagrams of the support base in some embodiments of this application;

[0034] Figure 3 This is a second schematic diagram of the battery module structure in some embodiments of this application;

[0035] Figure 4 yes Figure 3 Enlarged structural diagram at point A;

[0036] Figure 5 This is one of the structural schematic diagrams of the energy storage device in some embodiments of this application;

[0037] Figure 6 These are schematic diagrams of the shell structure in some embodiments of this application;

[0038] Figure 7 These are schematic diagrams of the housing and support base in some embodiments of this application;

[0039] Figure 8 This is a second schematic diagram of the energy storage device in some embodiments of this application;

[0040] Figure 9 yes Figure 8 Enlarged structural diagram at point B;

[0041] Figure 10 yes Figure 8 Enlarged structural diagram at point C;

[0042] Figure 11 This is a schematic diagram of the structure of the convex hull and concave portion in some embodiments of this application;

[0043] Figure 12 This is the third of the structural schematic diagrams of the energy storage device in some embodiments of this application.

[0044] Figure label:

[0045] 100 Battery module; 110 Cell; 111 First end; 112 Second end; 113 Second guide adapter surface; 114 Recess; 120 Electrode; 130 Support base; 131 Support arm; 132 Positioning hole; 133 First connecting post; 134 First protrusion; 135 Protrusion; 136 First guide adapter surface; 137 Support part; 140 Fixing base; 141 Second connecting post; 150 Fastener; 160 Connecting groove; 170 Connecting protrusion; 180 Through hole; 200 Energy storage device; 210 Housing; 220 Cover; 230 Second protrusion. Detailed Implementation

[0046] The embodiments of this application will now be described in detail. Examples of these embodiments are illustrated in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this application, and should not be construed as limiting this application. All other embodiments obtained by those skilled in the art based on the embodiments of this application without inventive effort are within the scope of protection of this application.

[0047] The terms "first" and "second" in the specification and claims of this application may explicitly or implicitly include one or more of the features. In the description of this application, unless otherwise stated, "multiple" means two or more. Furthermore, "and / or" in the specification and claims indicates at least one of the connected objects, and the character " / " generally indicates that the preceding and following objects are in an "or" relationship.

[0048] In the description of this application, it should be understood that the orientation or positional relationship indicated by terms such as "protrusion direction" is based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing this application and simplifying the description, and is not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0049] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "linking" 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; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0050] As an energy storage component of energy storage devices, battery modules store and release energy through the charging and discharging process of battery cells.

[0051] In related technologies, the electrodes of the battery cell are generally welded to electrical connectors. Because the battery cell has a certain range of height tolerance, after the electrodes of the battery cell are welded to the electrical connectors, the end of the battery cell away from the electrodes may be in a suspended state. As a result, the weight of the battery cell is mainly borne by the electrical connectors. During transportation, the electrical connectors are prone to breakage due to excessive stress.

[0052] In view of this, the embodiments of this application aim to provide a battery module and energy storage device to solve the problem of electrical connectors being prone to breakage due to excessive force. The battery module includes: a support base, a battery cell, and a fixing base. The support base is provided with a positioning hole and a support arm. The support arm is a cantilever structure with one end connected to the support base and the other end being a free end, corresponding to the positioning hole. The battery cell has a first end and a second end arranged back-to-back. The first end of the battery cell extends into the positioning hole and abuts against the support arm. The second end of the battery cell is provided with an electrode. The fixing base is located on the side of the battery cell facing away from the support base and is connected to the support base, fixing the second end of the battery cell. When the first end of the battery cell abuts against the support arm, the battery cell can generate deformation in conjunction with the support arm. Correspondingly, the battery cell can also be supported by the rebound force of the support arm, thereby reducing the load on the battery cell from the electrical connectors and solving the problem of electrical connectors being prone to breakage due to excessive force.

[0053] Understandably, battery modules can be used in energy storage devices. Types of energy storage devices can include balcony photovoltaic energy storage, home energy storage, and portable energy storage.

[0054] Balcony photovoltaic (PV) energy storage is designed specifically for urban apartments or homes with limited space. It's a small-capacity, plug-and-play DIY (Do-It-Yourself) PV-storage system. It's typically an integrated unit; users don't need a professional electrician. Simply connect the PV panels to a home outlet with simple wiring to store and use the green electricity generated on the balcony or terrace. Its core purpose is to lower the barrier to entry for green energy use, helping families save on electricity bills, and it represents an important frontier for the popularization of distributed energy.

[0055] Home energy storage refers to stationary energy storage systems designed for detached houses or villas, typically with a capacity of 10 kWh or more, aiming to achieve greater self-sufficiency in household energy. It not only supports solar power integration but also possesses robust backup power capabilities, providing power to critical loads throughout the house for hours or even days during grid outages. Through intelligent management, it enables peak-valley electricity price arbitrage, making it a core component for improving the economy and reliability of household electricity usage.

[0056] Portable energy storage typically refers to portable "large outdoor power supplies" with capacities ranging from 0.5kWh to 3.5kWh. They are compact in appearance, equipped with handles or wheels, and their core features are that they are ready to use immediately without installation, and can be charged via mains power, vehicle power, or solar panels. They primarily provide off-grid power for outdoor camping, road trips, and short-term emergency power backup for homes, offering a convenient solution that satisfies both the freedom of mobile power use and short-term power security.

[0057] The following is combined Figures 1 to 12 The battery module and energy storage device provided in the embodiments of this application will be described in detail.

[0058] Reference Figure 1 , Figure 2 , Figure 3 and Figure 4 In some embodiments, this application provides a battery module 100, including a battery cell 110, a support base 130, and a fixing base 140.

[0059] The support base 130 is provided with a positioning hole 132 and a support arm 131. The support arm 131 is a cantilever structure with one end connected to the support base 130 and the other end being a free end. The support arm 131 corresponds to the positioning hole 132.

[0060] The battery cell 110 has a first end 111 and a second end 112 disposed back to back. The first end 111 of the battery cell 110 extends into the positioning hole 132 and the end of the first end 111 of the battery cell 110 abuts against the support arm 131. The second end 112 of the battery cell 110 is provided with an electrode 120.

[0061] The fixing seat 140 is located on the side of the battery cell 110 facing away from the support seat 130. The fixing seat 140 is connected to the support seat 130 and fixes the second end 112 of the battery cell 110.

[0062] The battery cell 110, as the core unit of the battery module 100, stores and releases energy through the charging and discharging process. The battery cell 110 has a first end 111 and a second end 112, which are arranged opposite to each other.

[0063] The support base 130 serves as the bottom support foundation of the battery module 100, providing support for one side of the battery cell 110. The support base 130 is provided with a positioning hole 132 and a support arm 131. The positioning hole 132 is used to accommodate one end of the battery cell 110. The support arm 131 is a cantilever structure mounted on the support base 130, and the support arm 131 can undergo elastic deformation under external force. During assembly, the first end 111 of the battery cell 110 is inserted into the positioning hole 132 and comes into contact with the support arm 131. At this time, the weight of the battery cell 110 will cause a slight deformation of the support arm 131, thereby absorbing the positional differences caused by the height tolerance of the battery cell 110 through deformation, thus preventing it from being suspended in mid-air. At the same time, when the support arm 131 deforms, it will generate a spring force opposite to the direction of deformation. That is, the rebound force of the support arm 131 will act on the first end 111 of the battery cell 110, providing an upward support force for the battery cell 110, thereby reducing the load on the battery cell 110 by the electrical connector.

[0064] The mounting bracket 140 is disposed on the side of the battery cell 110 opposite to the support bracket 130, i.e., the mounting bracket 140 and the support bracket 130 are arranged opposite each other, and is used to fix the second end 112 of the battery cell 110. In other words, the battery cell 110 is located between the support bracket 130 and the mounting bracket 140. The mounting bracket 140 and the support bracket 130 together form the overall frame of the battery module 100, serving as the mounting base for the battery cell 110. In this way, the battery cell 110 can remain stable within the battery module 100, preventing the battery cell 110 from moving when subjected to external forces.

[0065] In the above embodiment, by setting a cantilever support arm 131, and utilizing the elastic characteristics of the support arm 131, the support arm 131 can automatically adjust its contact state by slightly bending its free end in conjunction with the battery cell 110, making it less likely for the battery cell 110 to become suspended. Furthermore, the rebound force of the support arm 131 can provide upward support for the battery cell 110, thereby distributing the weight of the battery cell 110 to the support arm 131 and the electrical connectors, reducing the burden on the electrical connectors. These two factors combined can reduce the risk of breakage of the electrical connectors, thereby extending the service life of the battery module 100.

[0066] In some embodiments, the same positioning hole 132 corresponds to a plurality of support arms 131, and the end of the first end 111 of the battery cell 110 abuts against the plurality of support arms 131.

[0067] Specifically, two or more support arms 131 are provided within the area of ​​a positioning hole 132. During assembly, after the first end 111 of the battery cell 110 is inserted into the positioning hole 132, its first end 111 simultaneously abuts against the free ends of multiple support arms 131, thus forming multi-point support. On the one hand, multiple support arms 131 share the weight of the first end 111 of the battery cell 110. Compared to a single support arm 131, the weight of the battery cell 110 can be distributed to each support arm 131, thereby reducing the force borne by each support arm 131. This reduces the deformation of a single support arm 131, thereby reducing the risk of excessive deformation or even damage to a single support arm 131 due to excessive force, thus improving the reliability and durability of the support arm 131. On the other hand, multiple support arms 131 also increase the support points of the battery cell 110, making the battery cell 110 more stable on the support base 130.

[0068] In practical applications, multiple support arms 131 corresponding to the same positioning hole 132 are distributed in a spoke-like manner based on the center of the positioning hole 132, and the end of the support arm 131 closest to the center of the positioning hole 132 is the free end.

[0069] In the above embodiment, multiple support arms 131 are arranged in a centrally symmetrical manner with the center point of the positioning hole 132 as a reference, similar to the shape of wheel spokes radiating outward from the center of the hub. The cantilever portion of the support arm 131 (from the connection position between the support base 130 and the support arm 131 to the free end) is located within the positioning hole 132, and the free ends of all support arms 131 are close to the central region of the positioning hole 132.

[0070] In this way, when the first end 111 of the battery cell 110 abuts against the support arm 131, the weight of the battery cell 110 can be evenly distributed to each support arm 131, thereby reducing the risk of fatigue fracture of the support arm 131. Simultaneously, there are gaps between the multiple support arms 131, which can serve as channels for airflow. During the operation of the battery module 100, the battery cell 110 generates heat. Through the gaps between the multiple support arms 131, air can flow more freely, carrying away the heat generated by the battery cell 110, thereby reducing the temperature of the battery module 100 and improving its performance and safety.

[0071] Reference Figure 3 and Figure 4 In some embodiments, the support arm 131 is provided with a first protrusion 134, which is provided in a direction opposite to the battery cell 110. The first protrusion 134 is used to abut against the housing 210 to limit the deformation of the support arm 131.

[0072] In the above embodiment, the support arm 131 is provided with a first protrusion 134, and the first protrusion 134 protrudes in a direction away from the battery cell 110. For example, if the battery cell 110 is located above the support base 130, and the free end of the support arm 131 abuts against the battery cell 110 upwards, then the first protrusion 134 protrudes downwards. In this way, during assembly, when the battery module 100 is placed inside the housing 210, when the support arm 131 undergoes elastic deformation due to the gravity of the battery cell 110, the first protrusion 134, as the bottom of the support arm 131, will move synchronously with the deformation of the support arm 131 until it contacts the housing 210. At this time, the housing 210 applies a rigid reaction force to the support arm 131 through the first protrusion 134, preventing the support arm 131 from continuing to deform, thereby limiting the maximum deformation of the support arm 131.

[0073] Understandably, in practical use, the distance between the housing 210 and the support arm 131 must be equal to the maximum allowable deformation of the support arm 131; otherwise, the limit switch will fail. In the above embodiment, by setting the first protrusion 134 to contact the housing 210, the distance between the housing 210 and the support arm 131 can be designed to be greater than the maximum allowable deformation of the support arm 131. The difference can be compensated by the height of the first protrusion 134. This allows for a more flexible arrangement of the gap between the battery cell 110 and the housing 210. For example, if enhanced heat dissipation and explosion-proof performance are required, the gap can be increased. With a larger gap, a more spacious heat dissipation channel can be formed between the battery cell 110 and the housing 210, and a larger buffer space can be reserved for the battery cell 110 in case of runaway.

[0074] In practical applications, the first protrusion 134 can be columnar, block-shaped, or arc-shaped.

[0075] Reference Figure 11 In some embodiments, the support arm 131 is provided with a protrusion 135 on the side facing the battery cell 110, and the end of the first end 111 of the battery cell 110 abuts against the protrusion 135.

[0076] In the above embodiment, the support arm 131 has a protrusion 135 on the side facing the battery cell 110, that is, the area in direct contact with the first end 111 of the battery cell 110 has the protrusion 135. During assembly, the protrusion 135 directly abuts against the first end 111 of the battery cell 110. In this way, the weight of the battery cell 110 is initially concentrated on the top of the protrusion 135, and then the shape of the protrusion 135 gradually disperses the stress to a larger area of ​​the support arm 131, thereby reducing the risk of damage to the support arm 131 caused by excessive local stress. At the same time, the protrusion 135 is equivalent to adding a local reinforcing structure to the support arm 131, which can resist bending and deformation caused by the pressure of the battery cell 110, thereby helping to improve the overall load-bearing capacity of the support arm 131.

[0077] Understandably, the shape of the convex hull 135 can be a sphere, a cylinder, or a frustum.

[0078] In practical applications, based on the case where multiple support arms 131 correspond to the same positioning hole 132, multiple protrusions 135 are arranged in a circular array, and the end of the first end 111 of the battery cell 110 has a concave portion 114 or a convex portion, and multiple protrusions 135 abut against the concave portion 114 or the convex portion.

[0079] In the above embodiments, when multiple support arms 131 correspond to the same positioning hole 132, each support arm 131 has a protrusion 135 on the side facing the battery cell 110, and all protrusions 135 are arranged in a circular array (i.e., uniformly distributed around the circumference), thereby evenly distributing the pressure of the battery cell 110 onto each protrusion 135. Each protrusion 135 bears a portion of the pressure, and because the arrangement of the protrusions 135 is uniform around the circumference, the pressure distribution in the circumferential direction is also more uniform, making the force on the battery cell 110 more uniform in all directions. At the same time, since the protrusions 135 are uniformly distributed around the circumference, when there is a deviation in the diameter of the battery cell 110, the contact point position between the protrusion 135 and the battery cell 110 will change relatively. For a battery cell 110 with a larger diameter, the protrusion 135 will generate a component force from the center outward when it contacts the battery cell 110. This component force will cause the battery cell 110 to be pushed outward, thereby "spreading" the battery cell 110 in the circumferential direction, so as to better fit with the surrounding structure and eliminate the gap that may be caused by the large diameter. For a battery cell 110 with a smaller diameter, it can keep the battery cell 110 in a relatively stable position and will not wobble due to the small diameter.

[0080] Furthermore, the first end 111 of the battery cell 110 has a recess 114 or a protrusion, and multiple protrusions 135 abut against the recess 114 or the protrusion. Through the interaction between the recess 114 or the protrusion of the first end 111 of the battery cell 110 and the protrusions 135 on the support arm 131, the protrusions 135 are engaged at specific positions on the recess 114 or the protrusion, thereby restricting the rotational freedom of the battery cell 110 around its own axis, ensuring that the position of the battery cell 110 within the battery module 100 remains stable.

[0081] Reference Figure 10 and Figure 11 In some embodiments, based on the case where multiple support arms 131 correspond to the same positioning hole 132, multiple protrusions 135 are arranged circumferentially at intervals, and the surface of each protrusion 135 is provided with a first guide adapter surface 136. The first guide adapter surface 136 includes an inclined surface and / or an arc surface, and the end of the first end 111 of the battery cell 110 has a second guide adapter surface 113 that adapts to the first guide adapter surface 136.

[0082] In the above embodiment, by providing a first guide adapter surface 136 on the surface of the convex hull 135 and providing a second guide adapter surface 113 that adapts to the first guide adapter surface 136 at the first end 111 of the battery cell 110, during assembly, the battery cell 110 only needs to be brought close to the support arm 131, and the second guide adapter surface 113 at the first end 111 of the battery cell 110 will automatically slide into the correct position along the first guide adapter surface 136 of the convex hull 135, thereby reducing assembly difficulty and improving assembly efficiency.

[0083] Reference Figure 4 In some embodiments, the support arm 131 and the support base 130 are integrally formed. The integral forming makes the support arm 131 and the support base 130 a whole structure, without the connection gaps or weak points that may exist in the traditional assembly structure. This allows for better stress distribution and avoids structural damage caused by local stress concentration, thereby improving the structural strength and stability of the entire battery module 100.

[0084] Understandably, the support portion 137 is detachably mounted on the support base 130, and the support arm 131 is part of the support portion 137. In other words, the support base 130 and the support arm 131 are two detachable parts, thereby enabling the support arm 131 to be plug-and-play to meet the needs of the same model of battery cell 110 without replacing the entire support base 130.

[0085] In practical applications, the support arm 131 is a temperature-sensitive elastomer; within a temperature range of -30℃ to 80℃, the change in the elastic modulus of the support arm 131 is greater than or equal to 0 and less than or equal to 15%.

[0086] Thermosensitive elastomers refer to elastic materials that are sensitive to temperature but whose changes are controllable (such as modified silicone rubber, thermoplastic elastomers, polyurethane elastomers, etc.). In the working temperature range of -30℃ to 80℃, the change in elastic modulus of the support arm 131 is controlled within 0~15%, which can reduce the fluctuation of the elastic performance of the support arm 131 in low temperature or high temperature environments, so that the support force of the support arm 131 on the battery cell 110 is relatively stable at different temperatures.

[0087] Reference Figure 1 , Figure 2 , Figure 8 and Figure 9In some embodiments, the support base 130 is provided with a first connecting post 133 extending toward the fixed base 140, and the fixed base 140 is provided with a second connecting post 141 extending toward the support base 130. One of the ends of the first connecting post 133 and the second connecting post 141 is provided with a connecting groove 160, and the other is provided with a connecting protrusion 170. The protrusion height of the connecting protrusion 170 is greater than the depth of the connecting groove 160. The connecting protrusion 170 extends into the connecting groove 160. The top of the connecting protrusion 170 and the bottom wall of the connecting groove 160 are both provided with through holes 180. The through holes 180 are used for fasteners 150 to pass through, so that the connecting protrusion 170 and the connecting groove 160 are connected and fixed by the fasteners 150.

[0088] In the above embodiment, the support base 130 is provided with a first connecting post 133, and the fixed base 140 is provided with a second connecting post 141. One of the first connecting post 133 and the second connecting post 141 is provided with a connecting groove 160, and the other is provided with a connecting protrusion 170. The height of the connecting protrusion 170 is greater than the depth of the connecting groove 160. During assembly, the connecting protrusion 170 extends into the connecting groove 160, thereby achieving initial positioning and limiting shaking. On the one hand, this can improve the stability of the connection, and on the other hand, it can also improve the assembly efficiency. The fastener 150 passes through the connecting protrusion 170 and the connecting groove 160, so that the first connecting post 133 and the second connecting post 141 are connected and fixed, thereby making the support base 130 and the fixed base 140 form an integral frame.

[0089] Reference Figures 5 to 12 In some embodiments, this application also provides an energy storage device 200, including a housing 210 and a battery module 100 provided in any of the above embodiments. The battery module 100 is located within the housing 210. Therefore, the energy storage device 200 possesses all the beneficial effects of any of the above embodiments, which will not be elaborated further here.

[0090] In some embodiments, the support base 130 is disposed opposite to the inner wall of the housing 210, and the inner wall of the housing 210 can abut against the support arm 131 to limit the deformation of the support arm 131.

[0091] In practical applications, the support base 130 is disposed within the housing 210 and is positioned opposite to the inner wall of the housing 210. When the support arm 131 undergoes elastic deformation due to the gravity of the battery cell 110, the free end of the support arm 131 moves towards the inner wall of the housing 210 until it comes into contact with the inner wall of the housing 210. At this point, the inner wall of the housing 210 acts as a rigid boundary, limiting further deformation of the support arm 131. In this way, by controlling the deformation of the support arm 131 within a safe range, the risk of breakage or failure due to excessive deformation of the support arm 131 can be reduced, thereby ensuring the stability of the entire battery module 100 structure.

[0092] Reference Figure 6 and Figure 7 In some embodiments, a second protrusion 230 is provided on the inner wall, the second protrusion 230 protrudes toward the support arm 131, and the second protrusion 230 is used to abut against the support arm 131 to limit the deformation of the support arm 131.

[0093] In the above embodiment, the inner wall of the housing 210 is provided with a second protrusion 230, which protrudes towards the support arm 131. Compared to the entire inner wall plane of the housing 210 contacting the support arm 131, by providing the second protrusion 230 to contact the support arm 131, the distance between the housing 210 and the support arm 131 can be designed to be greater than the maximum allowable distance of the support arm 131, and the difference can be compensated by the height of the second protrusion 230. In this way, the spacing between the battery cell 110 and the housing 210 can be arranged more flexibly. For example, if enhanced heat dissipation and explosion-proof performance are required, the spacing can be increased. With the increased spacing, a more spacious heat dissipation channel can be formed between the battery cell 110 and the housing 210, and a larger buffer space can be reserved for the battery cell 110 in case of runaway.

[0094] In some embodiments, the second protrusion 230 is arranged in an annular shape, and a plurality of support arms 131 corresponding to the same positioning hole 132 are arranged at intervals along the circumference of the second protrusion 230. The second protrusion 230 corresponds to the plurality of support arms 131, and the second protrusion 230 is used to abut against the plurality of support arms 131 to limit the deformation of the plurality of support arms 131.

[0095] In this way, when the support arm 131 deforms due to the gravity or impact of the battery cell 110, its free end abuts against the annular second protrusion 230. Compared to multiple dispersed second protrusions 230, the annular second protrusion 230 is easier to design and manufacture. During the design and processing of the housing 210, there is no need to consider layout and fit issues. Simultaneously, when multiple support arms 131 deform and abut against the annular second protrusion 230, the annular structure can evenly distribute the force transmitted from the support arms 131 around the housing 210, which helps improve the overall stability of the housing 210.

[0096] Reference Figure 12 In some embodiments, the energy storage device 200 further includes a cover 220, which, together with the housing 210, forms a relatively sealed cavity in which the battery module 100 is disposed. This protects the battery module 100. It is understood that an electrical interface may also be provided on the cover 220.

[0097] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this application. 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.

[0098] Although embodiments of this application have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of this application, the scope of which is defined by the claims and their equivalents.

Claims

1. A battery module, characterized in that, include: A support base is provided with a positioning hole and a support arm. The support arm is a cantilever structure with one end connected to the support base and the other end being a free end. The support arm corresponds to the positioning hole. A battery cell having a first end and a second end disposed back to back, the first end of the battery cell extending into the positioning hole and the end of the first end of the battery cell abutting against the support arm, and the second end of the battery cell being provided with an electrode; A fixing base is provided on the side of the battery cell facing away from the support base. The fixing base is connected to the support base and fixes the second end of the battery cell.

2. The battery module according to claim 1, characterized in that, The same positioning hole corresponds to multiple support arms, and the end of the first end of the battery cell abuts against the multiple support arms.

3. The battery module according to claim 2, characterized in that, The multiple support arms corresponding to the same positioning hole are distributed in a spoke-like manner based on the center of the positioning hole, and the end of the support arm closest to the center of the positioning hole is the free end.

4. The battery module according to claim 1, characterized in that, The support arm is provided with a first protrusion, which is provided in a direction opposite to the battery cell. The first protrusion is used to abut against the housing to limit the deformation of the support arm.

5. The battery module according to any one of claims 1 to 3, characterized in that, The support arm has a protrusion on the side facing the battery cell, and the end of the first end of the battery cell abuts against the protrusion.

6. The battery module according to claim 5, characterized in that, Given that there are multiple support arms corresponding to the same positioning hole, the multiple protrusions are arranged in a circular array, and the end of the first end of the battery cell has a concave or convex portion, and the multiple protrusions abut against the concave or convex portion; or Given that there are multiple support arms corresponding to the same positioning hole, the multiple protrusions are arranged circumferentially at intervals, and each protrusion has a first guide adapter surface on its surface. The first guide adapter surface includes an inclined surface and / or an arc surface, and the end of the first end of the battery cell has a second guide adapter surface that adapts to the first guide adapter surface.

7. The battery module according to any one of claims 1 to 3, characterized in that, The support arm and the support base are integrally formed; or A support portion is detachably mounted on the support base, and the support arm is part of the support portion.

8. The battery module according to any one of claims 1 to 3, characterized in that, The support arm is a temperature-sensitive elastomer; Within a temperature range of -30℃ to 80℃, the change in the elastic modulus of the support arm is greater than or equal to 0 and less than or equal to 15%.

9. The battery module according to any one of claims 1 to 3, characterized in that, The support base is provided with a first connecting post extending toward the fixed base, and the fixed base is provided with a second connecting post extending toward the support base. One end of the first connecting post and the end of the second connecting post are provided with a connecting groove, and the other end is provided with a connecting protrusion. The height of the connecting protrusion is greater than the depth of the connecting groove, and the connecting protrusion extends into the connecting groove. The top of the connecting protrusion and the bottom wall of the connecting groove are both provided with through holes. The through holes are used for fasteners to pass through, so that the connecting protrusion and the connecting groove are connected and fixed by the fasteners.

10. An energy storage device, characterized in that, It includes a housing and a battery module as claimed in any one of claims 1 to 9, the battery module being located within the housing.

11. The energy storage device according to claim 10, characterized in that, The support base is disposed opposite to the inner wall of the housing, and the inner wall of the housing abuts against the support arm to limit the deformation of the support arm.

12. The energy storage device according to claim 11, characterized in that, A second protrusion is provided on the inner wall, the second protrusion protruding towards the support arm, the second protrusion being used to abut against the support arm to limit the deformation of the support arm.

13. The energy storage device according to claim 12, characterized in that, The second protrusion is arranged in a ring shape, and multiple support arms corresponding to the same positioning hole are arranged at intervals along the circumference of the second protrusion. The second protrusion corresponds to multiple support arms, and the second protrusion is used to abut against multiple support arms to limit the deformation of multiple support arms.

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