Energy storage power supply

Abstract

The utility model discloses an energy storage power supply. The energy storage power supply comprises a shell, a plurality of battery cells and an inverter, the shell is provided with a containing cavity, a plurality of first grooves are formed in the inner wall of the containing cavity, a pressure relief structure is arranged on the bottom face of each first groove, and each pressure relief structure comprises a weak part and a first supporting part; the battery cell comprises a battery cell body, an anti-explosion valve, a positive electrode and a negative electrode, the positive electrode and the negative electrode are located at the first end of the battery cell body, the anti-explosion valve is located at the second end opposite to the battery cell body, and the second end of the battery cell body is inserted into the first groove and abuts against the first supporting part, so that the anti-explosion valve is spaced from the bottom surface and is arranged opposite to the weak part; the inverter is arranged in the accommodating cavity, and the inverter is electrically connected with the battery cell; the weak part is configured to be capable of breaking to enable the anti-explosion valve to communicate with the external environment of the shell in the state that the pressure of the first groove is increased. A part of the shell of the energy storage power supply can be set as a pressure relief structure, so that the space utilization rate of the energy storage power supply can be improved.

Description

Technical Field

[0001] This application relates to the field of energy storage technology, and more specifically, to an energy storage power source. Background Technology

[0002] In related technologies, energy storage power supplies need to have internal pressure relief space to prevent thermal runaway. However, with increasingly fierce market competition, energy storage power supplies are required to be lightweight and small in size. However, reserving pressure relief space inside the energy storage power supply results in low space utilization and a large overall size, which is not conducive to the miniaturization of energy storage power supplies. Utility Model Content

[0003] This application provides an energy storage power supply that can solve or improve the technical problem that reserving pressure relief space inside the energy storage power supply results in low space utilization, large overall size, and is not conducive to the miniaturization of the energy storage power supply.

[0004] An energy storage power supply according to an embodiment of this application includes a housing, a plurality of battery cells, and an inverter. The housing has a receiving cavity, and the inner wall of the receiving cavity has a plurality of first grooves. The bottom surface of the first groove has a pressure relief structure, which includes a weak part and a first support part. The battery cell includes a battery cell body, an explosion-proof valve, a positive electrode, and a negative electrode. The positive electrode and the negative electrode are located at a first end of the battery cell body, and the explosion-proof valve is located at a second end opposite to the battery cell body. The second end of the battery cell body is inserted into the first groove and abuts against the first support part, such that the explosion-proof valve is spaced apart from the bottom surface and is opposite to the weak part. The inverter is disposed in the receiving cavity and is electrically connected to the battery cells. The weak part is configured such that when the pressure in the first groove increases, the weak part can rupture to allow the explosion-proof valve to communicate with the external environment of the housing.

[0005] In this way, a portion of the energy storage power supply's casing can be configured as a pressure relief structure, eliminating the need for additional pressure relief space to address thermal runaway of the battery cells. This improves the space utilization of the energy storage power supply and facilitates its miniaturization.

[0006] In some embodiments, the weak point is the area where the wall thickness of the receiving cavity is reduced.

[0007] In this way, by thinning the wall thickness of the cavity to make it a weak point in the pressure relief structure, the thinned wall thickness can easily break when the pressure inside the energy storage power source increases, thus facilitating pressure relief.

[0008] In some embodiments, the weak point is the area enclosed by the reduced wall thickness of the inner wall of the receiving cavity.

[0009] In this way, by connecting the areas with reduced wall thickness inside the cavity to form a weak section, the weak section formed by the enclosure is more likely to rupture when the pressure inside the energy storage power source increases, thereby increasing the pressure relief area and facilitating the pressure relief of the explosion-proof valve.

[0010] In some embodiments, the first support portion divides the first groove into a second groove and a third groove, the third groove being closer to the center of the first groove than the second groove, and the weak portion is disposed within the third groove and / or the second groove.

[0011] Thus, by placing the weak point in the third groove and / or the second groove, it can be set accordingly based on the position of the explosion-proof valve, thereby improving the cell depressurization rate.

[0012] In some embodiments, a flexible pad is provided on the first support portion, the second end of the battery cell abuts against the flexible pad to form a sealed third groove, a weak portion is disposed in the third groove, and the explosion-proof valve is directly opposite the third groove.

[0013] Thus, by providing a flexible pad on the first support part, the pressure on the first support part can be reduced, and the flexible pad can form a sealed space to prevent the material ejected from the battery cell from overflowing. In addition, it can increase the pressure in the sealed space, which is conducive to the cracking and opening of the weak part.

[0014] In some embodiments, the pressure relief structure includes a plurality of the weak points, which are disposed within the second groove and the third groove.

[0015] In this way, by setting multiple weak points in the second and third grooves, multiple paths for cell depressurization can be provided, thereby improving the cell depressurization rate.

[0016] In some embodiments, the pressure relief structure includes a second support portion and a reinforcing rib, the second support portion being disposed within the third groove and dividing the third groove into a fourth groove and a fifth groove, the reinforcing rib connecting the first support portion and the second support portion, and the weak portion being disposed within the fourth groove.

[0017] Thus, by connecting the first and second support parts with reinforcing ribs, the support strength of the pressure relief structure can be improved. By placing the weak point in the fourth groove, it can be positioned according to the location of the explosion-proof valve, thereby improving the cell pressure relief rate.

[0018] In some embodiments, the first support portion and the second support portion are annular protrusions that protrude from the inner wall of the receiving cavity toward the battery cell body.

[0019] In this way, by forming annular protrusions on the inner wall of the receiving cavity, the battery cell body can be supported, the battery cell body can be fixed to the housing, and the battery cell movement can be prevented from causing pressure relief failure.

[0020] In some embodiments, the bottom surface of the first groove is spaced apart from the end face of the second end of the battery cell body by a preset distance, the preset distance being greater than or equal to 0.5 mm and less than or equal to 10 mm.

[0021] Thus, by setting the distance between the weak part and the end face of the battery cell body where the explosion-proof valve is located between 0.5mm and 10mm, it is possible to avoid pressure relief failure caused by the pressure relief path being blocked due to the distance being too small, and it is also possible to avoid pressure relief failure caused by the pressure relief pressure being too large to break the weak part.

[0022] In some embodiments, the energy storage power source includes a plurality of the pressure relief structures, which are arranged in a staggered manner.

[0023] In this way, by setting up multiple pressure relief structures and staggering them, it is possible to adapt to the number and location of the battery cells. The pressure generated when multiple battery cells experience thermal runaway can be relieved by the corresponding pressure relief structure, reducing the impact on the pressure relief structure.

[0024] In some embodiments, the energy storage power source includes a bus that is electrically connected at the first end of the cell body to the positive terminal of one cell and the negative terminal of another cell.

[0025] In this way, by setting up a bus to connect the positive and negative terminals of multiple battery cells, multiple battery cells can be connected in series to form current distribution and transmission.

[0026] In some embodiments, the energy storage power source includes a support frame connected to the inner wall of the receiving cavity, and the first end of the battery cell body is connected to the support frame.

[0027] In this way, by connecting the bracket to the inner wall of the receiving cavity, and connecting one end of the battery cell body with two electrodes to the bracket, the battery cell can be fixed to the bracket, thus preventing the battery cell from moving and causing pressure relief failure.

[0028] In some embodiments, the bracket is provided with a sixth groove, and the first end of the battery cell body is inserted into the sixth groove.

[0029] In this way, by fixing the battery cell body in the sixth groove of the bracket, the battery cell can be fixed without the need for pre-set installation space, which helps to reduce the size of the energy storage power supply.

[0030] In some embodiments, the battery cell is a cylindrical battery cell, the length direction of the battery cell is substantially perpendicular to the height direction of the energy storage power supply, the energy storage power supply includes multiple battery cells, and several of the battery cells form a battery module, and the inverter is disposed above the battery module in the height direction of the energy storage power supply.

[0031] Thus, by placing the battery cells horizontally within the energy storage power supply, the pressure relief path can be prevented from being blocked, thereby increasing the pressure relief rate. Placing the inverter above the battery module allows for a compact structure of the energy storage power supply, which helps reduce its size.

[0032] Additional aspects and advantages of embodiments 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 embodiments of this application. Attached Figure Description

[0033] 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, wherein:

[0034] Figure 1 This is a schematic diagram of the structure of an energy storage power source according to certain embodiments of this application;

[0035] Figure 2 This is an exploded view of an energy storage power source according to certain embodiments of this application;

[0036] Figure 3 This is a cross-sectional schematic diagram of an energy storage power source according to certain embodiments of this application;

[0037] Figure 4 This is a schematic diagram of the structure of the housing, battery cell and support according to certain embodiments of this application;

[0038] Figure 5 This is a schematic diagram of the pressure relief structure according to certain embodiments of this application;

[0039] Figures 6 to 8 This is a cross-sectional schematic diagram of a pressure relief structure according to certain embodiments of this application;

[0040] Figure 9 This is a structural schematic diagram of the bracket according to some embodiments of this application;

[0041] Figure 10 and Figure 11 This is a schematic diagram of the structure of a battery cell according to certain embodiments of this application.

[0042] Explanation of reference numerals in the attached figures:

[0043] 100. Energy storage power supply; 10. Housing; 11. Receiving cavity; 12. Pressure relief structure; 121. Weak part; 122. First support part; 1221. First groove; 12211. Second groove; 12212. Third groove; 12213. Fourth groove; 12214. Fifth groove; 1222. Flexible pad; 1223. Second support part; 1224. Reinforcing rib; 20. Battery cell; 21. Battery cell body; 211. First end; 212. Second end; 22. Explosion-proof valve; 23. Positive electrode; 24. Negative electrode; 30. Inverter; 40. Busbar; 50. Bracket; 51. Sixth groove; 52. Connecting post; 53. Fixing post. Detailed Implementation

[0044] The embodiments of this application are described in detail below. Examples of these embodiments are shown 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.

[0045] In the description of this application, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," and "counterclockwise," etc., indicating orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings, are used only for the convenience of describing this application 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, and therefore should not be construed as a limitation on this application. In the description of this application, "a plurality of" means two or more, unless otherwise explicitly specified.

[0046] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "joining" 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 communication of two components or the interaction between two components. For those skilled in the art, the specific meaning of the above terms in this application can be understood according to the specific circumstances.

[0047] In this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature being directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature being 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.

[0048] This disclosure provides numerous different embodiments or examples for implementing various structures of this application. To simplify the disclosure, specific examples of components and arrangements are described herein. These are merely examples and are not intended to limit the scope of this application. Furthermore, reference numerals and / or letters may be repeated in different examples; such repetition is for simplification and clarity and does not in itself indicate a relationship between the various embodiments and / or arrangements discussed. Additionally, examples of various specific processes and materials are provided, but those skilled in the art will recognize the application of other processes and / or the use of other materials.

[0049] Please see Figure 1 , Figure 2 and Figure 3 An energy storage power supply 100 according to an embodiment of this application includes a housing 10, a plurality of battery cells 20, and an inverter 30. The housing 10 is provided with a receiving cavity 11, and the inner wall of the receiving cavity 11 is provided with a plurality of first grooves 1221. The bottom surface of the first grooves 1221 is provided with a pressure relief structure 12, which includes a weak part 121 and a first support part 122. The battery cell 20 includes a battery cell body 21, an explosion-proof valve 22, a positive electrode 23, and a negative electrode 24. The positive electrode 23 and the negative electrode 24 are located at the first end 211 of the battery cell body 21. The explosion-proof valve 22 is located at the second end 212 opposite to the cell body 21. The second end 212 of the cell body 21 is inserted into the first groove 1221 and abuts against the first support part 122, so that the explosion-proof valve 22 is spaced apart from the bottom surface and is opposite to the weak part 121. The inverter 30 is disposed in the receiving cavity 11 and is electrically connected to the cell 20. The weak part 121 is configured such that when the pressure of the first groove 1221 increases, the weak part 121 can rupture to allow the explosion-proof valve 22 to communicate with the external environment of the housing 10.

[0050] In this way, a portion of the housing 10 of the energy storage power supply 100 can be set as a pressure relief structure 12, thus eliminating the need for additional pressure relief space to cope with the thermal runaway of the battery cell 20. This can improve the space utilization of the energy storage power supply 100 and is beneficial to the miniaturization of the energy storage power supply 100.

[0051] Among them, the energy storage power supply 100 is a device that can store electrical energy, can be used as a mobile power source, can store a large amount of electrical energy, and can efficiently transmit the stored electrical energy to other electrical devices.

[0052] Specifically, the energy storage power supply 100 includes a housing 10, battery cells 20, and an inverter 30. The housing 10 protects the internal components of the energy storage power supply 100, such as the battery cells 20 and the inverter 30. The housing 10 may include a first housing and a second housing, which can be connected to each other. For example, the first housing can be connected to the second housing by bolts or by clips.

[0053] The housing 10 is cylindrical in shape, thus forming a receiving cavity 11, which can be used to accommodate the battery cell 20, the inverter 30, and other devices. A first groove 1221 is provided on the inner wall of the receiving cavity 11. The number of first grooves 1221 can be multiple and matches the number of battery cells 20, so that the battery cells 20 can extend into the first grooves 1221.

[0054] A pressure relief structure 12 is provided on the bottom surface of the first groove 1221. The pressure relief structure 12 can be used to drain the material entering the pressure relief structure 12 and drain the material out of the energy storage power supply 100. The pressure relief structure 12 includes a weak part 121 and a first support part 122. In some embodiments, the weak part 121 can be a region where the wall thickness of the inner wall of the receiving cavity 11 is reduced. By reducing the wall thickness of the inner wall of the receiving cavity 11 to serve as the weak part 121 of the pressure relief structure 12, the reduced wall thickness is easy to break when the pressure inside the energy storage power supply 100 increases, thus facilitating pressure relief.

[0055] In some embodiments, the weak part 121 may be an area formed by the thinning of the inner wall of the receiving cavity 11. By connecting the thinning of the inner wall of the receiving cavity 11 to form the weak part 121, the weak part 121 formed is more likely to rupture when the pressure inside the energy storage power supply 100 increases, thereby increasing the pressure relief area and facilitating the pressure relief of the explosion-proof valve 22.

[0056] It should be noted that the weak point 121 can rupture when the air pressure in the pressure relief structure 12 reaches its pressure-bearing limit, forming a pressure relief channel, thereby diverting the material entering the pressure relief structure 12 out of the energy storage power supply 100. The first support part 122 can be used to receive the device entering the pressure relief structure 12, preventing the device from pressing on the weak point 121 and causing it to rupture. For example, when the battery cell 20 enters the pressure relief structure 12, the first support part 122 can support the end face of the battery cell 20, thereby preventing the end face of the battery cell 20 from pressing on the weak point 121.

[0057] The battery cell 20 is capable of storing electrical energy and outputting electrical energy when needed. It stores electrical energy by converting it into chemical energy and releases it back into electrical energy when needed. The number of battery cells 20 can be multiple, and is not limited here. Multiple battery cells 20 can be mounted on the first support portion 122, thereby fixing the battery cells 20 in place. The battery cell 20 includes a battery cell body 21, an explosion-proof valve 22, a positive electrode 23, and a negative electrode 24. The battery cell body 21 stores chemical energy, and the positive electrode 23 and negative electrode 24 convert chemical energy into electrical energy. The positive electrode 23 and negative electrode 24 are located at the first end 211 of the battery cell body 21.

[0058] An explosion-proof valve 22 is located at the second end 212 of the cell body 21. It can open the cell body 21 to release the pressure generated in the cell body 21 when thermal runaway occurs in the cell 20. For example, the explosion-proof valve 22 may have a weak point or device inside. When the pressure in the cell 20 increases, the weak point will be forced open by the pressure, thereby releasing the pressure in the cell 20 and preventing the cell 20 from exploding or catching fire due to abnormal conditions such as overcharging, over-discharging, or short circuits.

[0059] Positive electrode 23 and negative electrode 24 are located on the same side of the cell body 21, while explosion-proof valve 22 is located on the opposite side of the cell body 21. That is, positive electrode 23 and negative electrode 24 and explosion-proof valve 22 are located at opposite ends of the cell body 21, and the second end 212 of the cell body 21 can be inserted into the first groove 1221 and abut against the first support part 122, so that the end of the cell body 21 with explosion-proof valve 22 can be connected to the first support part 122. This allows the explosion-proof valve 22 to be positioned opposite the weak part 121. When the pressure in the first groove 1221 of the cell 20 increases (such as when the cell 20 is in a thermal runaway state), the pressure released by the explosion-proof valve 22 can rupture the weak part 121 to form a pressure relief path, thereby allowing the explosion-proof valve 22 to communicate with the external environment of the housing 10, and the released pressure can be transmitted to the external environment.

[0060] Inverter 30 can be a converter that can convert DC power and AC power of fixed frequency and fixed voltage or frequency and voltage regulation. For example, inverter 30 can convert DC power (such as batteries, storage batteries, etc.) into AC power, or convert AC power into DC power, or convert low voltage into high voltage, or high voltage into low voltage.

[0061] Please see Figure 4 In some embodiments, the pressure relief structure 12 and the housing 10 are integrally formed.

[0062] In this way, by integrally molding the pressure relief structure 12 with the housing 10, the battery cell 20 can be fixed to the housing 10, thereby achieving a module-free fixing structure and eliminating the need to reserve installation space for the pressure relief structure 12. This reduces the volume of the energy storage power supply 100, improves the space utilization of the energy storage power supply 100, reduces product costs, and facilitates the miniaturization of the energy storage power supply 100.

[0063] Specifically, the pressure relief structure 12 and the shell 10 can be manufactured using an integral molding process. For example, when the pressure relief structure 12 and the shell 10 are made of metal, they can be manufactured by sand casting, pressure casting, or gas casting, in which molten metal or alloy is injected into a pre-made mold, and the pressure relief structure 12 and the shell 10 are formed after solidification and cooling. When the pressure relief structure 12 and the shell 10 are made of plastic, molten plastic material is injected into a mold under high pressure, and the pressure relief structure 12 and the shell 10 are obtained after cooling and solidification to the required shape and size.

[0064] Therefore, instead of assembling the battery cells 20 into modules and then installing multiple modules into the housing 10 to form a three-level assembly mode of "battery cell 20-module-housing 10", the battery cells 20 are directly integrated into the housing 10, which simplifies the assembly process, thereby significantly simplifying the structure of the housing 10, improving space utilization, and thus increasing the energy density of the battery and reducing costs.

[0065] Please see Figure 5 and Figure 6 In some embodiments, the first support portion 122 is provided with a first groove 1221, and one end of the battery cell body 21 with an explosion-proof valve 22 is engaged in the first groove 1221, and the weak portion 121 is provided on the bottom surface of the first groove 1221.

[0066] Thus, by providing a first groove 1221 in the first support part 122, the battery cell 20 can be locked in the first groove 1221, thereby fixing the battery cell 20 to the housing 10 while facilitating disassembly. Furthermore, by setting the weak part 121 on the bottom surface of the first groove 1221, the explosion-proof valve 22 and the weak part 121 are both located in the first groove 1221, so that the air pressure generated when the explosion-proof valve 22 is depressurized can rupture the weak part 121, thereby facilitating the depressurization of the explosion-proof valve 22.

[0067] Specifically, the first support portion 122 has a first groove 1221, the shape and size of which can be adapted to the shape and size of the battery cell body 21. For example, if the battery cell body 21 is cylindrical, the first groove 1221 is cylindrical; if the battery cell body 21 is prismatic, the first groove 1221 is prismatic. Thus, the first groove 1221 can be used to accommodate the battery cell body 21, so that the battery cell body 21 is embedded in the first groove 1221, fixing the battery cell body 21 to the first support portion 122.

[0068] Furthermore, the weak part 121 is located on the bottom wall of the first groove 1221. When the battery cell body 21 is embedded in the first groove 1221, the end of the battery cell body 21 with the explosion-proof valve 22 can be positioned opposite to the weak part 121. Thus, when the explosion-proof valve 22 is depressurized, the generated air pressure can squeeze the weak part 121 along the shortest path, breaking the weak part 121 to form a depressurization path, thereby reducing the depressurization time.

[0069] Please see Figure 5 and Figure 6 In some embodiments, the first support portion 122 includes a first support portion 122 disposed in the first groove 1221. The first support portion 122 supports one end face of the battery cell body 21 where the explosion-proof valve 22 is provided and spacees the end face of the battery cell body 21 where the explosion-proof valve 22 is provided from the bottom surface of the first groove 1221.

[0070] Thus, by providing a first support portion 122 in the first groove 1221, the first support portion 122 can support the battery cell body 21 and the explosion-proof valve 22 is spaced from the bottom surface of the first groove 1221, avoiding restriction of the gas emission path, resulting in poor gas emission or slowed emission speed, thereby increasing the internal pressure of the battery cell 20 and aggravating thermal runaway.

[0071] Specifically, the first support portion 122 includes a first support portion 122, which can be used to support the battery cell body 21 and prevent the battery cell body 21 from squeezing the weak portion 121, thus preventing the weak portion 121 from breaking. The first support portion 122 is disposed in the first groove 1221, and the first support portion 122 is an annular protrusion protruding from the inner wall of the receiving cavity 11 toward the battery cell body 21. In this way, by forming an annular protrusion on the inner wall of the receiving cavity 11, the battery cell body 21 can be supported, fixing the battery cell body 21 to the housing 10 and preventing the battery cell 20 from moving and causing pressure relief failure. For example, the first support portion 122 can be an annular plane protruding from the inner wall of the receiving cavity 11 or an annular rib protruding from the inner wall of the receiving cavity 11. This allows the first support portion 122 to support the end face of the battery cell body 21 where the explosion-proof valve 22 is located, and allows the end face of the battery cell body 21 where the explosion-proof valve 22 is located to be spaced from the bottom surface of the first groove 1221, thereby allowing a pressure relief path to be formed between the battery cell body 21 and the inner wall of the receiving cavity 11.

[0072] Please see Figure 5 and Figure 7 In some embodiments, the first support portion 122 divides the first groove 1221 into a second groove 12211 and a third groove 12212. The third groove 12212 is closer to the center of the first groove 1221 than the second groove 12211. The weak portion 121 is disposed in the third groove 12212 and / or the second groove 12211.

[0073] Thus, by setting the weak part 121 in the third groove 12212 and / or the second groove 12211, it can be set according to the position of the explosion-proof valve 22, thereby improving the pressure relief rate of the battery cell 20.

[0074] Specifically, the first support portion is disposed within the first groove 1221, and the first support portion 122 can divide the first groove 1221 into a second groove 12211 and a third groove 12212, with the third groove 12212 being closer to the center of the first groove 1221 than the second groove 12211. Both the second groove 12211 and the third groove 12212 can be used to house the weak portion 121, so that a pressure relief path is formed between the explosion-proof valve 22 and the weak portion 121 within either the second groove 12211 or the third groove 12212. The position of the weak portion 121 is determined by the position of the explosion-proof valve 22 on the battery cell body 21. For example, when the explosion-proof valve 22 on the battery cell body 21 is correspondingly disposed on the third groove 12212, the weak part 121 can be disposed within the third groove 12212; when the explosion-proof valve 22 on the battery cell body 21 is correspondingly disposed on the second groove 12211, the weak part 121 can be disposed within the second groove 12211; when the explosion-proof valve 22 on the battery cell body 21 is correspondingly disposed on the second groove 12211 and the third groove 12212, the weak part 121 can be disposed within the second groove 12211 and the third groove 12212.

[0075] Please see Figure 5 In some embodiments, a flexible pad 1222 is provided on the first support portion 122, and the second end 212 of the battery cell 20 abuts against the flexible pad 1222 to form a sealed third groove 12212. The weak portion 121 is provided in the third groove 12212, and the explosion-proof valve 22 is directly opposite the third groove 12212.

[0076] Thus, by providing a flexible pad 1222 on the first support portion 122, the pressure on the first support portion 122 can be reduced, and the flexible pad 1222 can form a sealed space to prevent the material ejected from the battery cell 20 from overflowing. In addition, it can increase the pressure in the sealed space, which is conducive to the cracking and opening of the weak portion 121.

[0077] Specifically, a flexible pad 1222 is provided on the first support portion 122. The flexible pad 1222 can be made of a material with soft and elastic properties. For example, the flexible pad 1222 can be a foam polyurethane pad, a rubber pad, a polyester pad, a polyether pad, etc. This gives the flexible pad 1222 a certain buffering, sealing, shock absorption, or protective capability. The flexible pad 1222 can be adhered to the first support portion 122 with glue or other adhesives. When the battery cell 20 is inserted into the first groove 1221, the second end 212 of the battery cell 20 can abut against the flexible pad 1222, thereby sealing the third groove 12212 and placing the weak part 121 in the third groove 12212, so that the explosion-proof valve 22 faces the third groove 12212. Thus, when the battery cell 20 experiences thermal runaway, the gas flow released by the explosion-proof valve 22 can enter the sealed third groove 12212, increasing the pressure in the third groove 12212, thereby causing the weak part 121 to rupture and release pressure.

[0078] Please see Figure 5 In some embodiments, the pressure relief structure 12 includes a plurality of weak points 121, which are disposed in the second groove 12211 and the third groove 12212.

[0079] Thus, by providing multiple weak points 121 in the second groove 12211 and the third groove 12212, multiple paths for the cell 20 to depressurize can be provided, thereby improving the depressurization rate of the cell 20.

[0080] Specifically, the number of weak points 121 can be multiple, which is not limited here. Multiple weak points 121 can be arranged within the pressure relief structure 12, thereby forming multiple pressure relief paths. This allows the pressure generated during thermal runaway of the battery cell 20 to be released quickly, improving the pressure relief efficiency of the pressure relief structure 12. Furthermore, multiple weak points 121 have a lower pressure resistance than a single weak point 121, making them more susceptible to rupture by air pressure impact, thus preventing situations where the weak point 121 cannot rupture for an extended period due to excessively low air pressure. For example, multiple weak points 121 can be simultaneously arranged within the second groove 12211 and the third groove 12212; multiple weak points 121 can be arranged within the second groove 12211; and multiple weak points 121 can be arranged within the third groove 12212.

[0081] Please see Figure 5 and Figure 8In some embodiments, the pressure relief structure 12 includes a second support portion 1223 and a reinforcing rib 1224. The second support portion 1223 is disposed in the third groove 12212 and divides the third groove 12212 into a fourth groove 12213 and a fifth groove 12214. The reinforcing rib 1224 connects the first support portion 122, the first support portion 122 and the second support portion 1223. The weak portion 121 is disposed in the fourth groove 12213.

[0082] Thus, by connecting the first support portion 122, the second support portion 1223, and the reinforcing rib 1224, the support strength of the pressure relief structure 12 can be improved. By placing the weak portion 121 in the fourth groove 12213, it can be set accordingly according to the position of the explosion-proof valve 22, thereby improving the pressure relief rate of the battery cell 20.

[0083] Specifically, the pressure relief structure 12 further includes a second support portion 1223 and a reinforcing rib 1224. The second support portion 1223 supports the battery cell body 21, creating a gap between the battery cell body 21 and the weak portion 121, preventing the battery cell body 21 from compressing the weak portion 121 and causing it to crack. The reinforcing rib 1224 connects the first support portion 122, the first support portion 122, and the second support portion 1223. Multiple reinforcing ribs 1224 can be present, thereby strengthening the structural integrity of the frame portion, the first support portion 122, and the second support portion 1223, preventing the first support portion 122 and the second support portion 1223 from failing to support the battery cell body 21 when it is inserted into the pressure relief structure 12.

[0084] The second support portion 1223 is an annular protrusion extending from the inner wall of the receiving cavity 11 toward the battery cell body 21. Thus, by forming an annular protrusion on the inner wall of the receiving cavity 11, the battery cell body 21 can be supported, fixing it to the housing 10 and preventing the battery cell 20 from moving and causing pressure relief failure. The second support portion 1223 can be disposed within the third groove 12212, thereby dividing the third groove 12212 into a fourth groove 12213 and a fifth groove 12214. Furthermore, the weak point 121 can be disposed within the fourth groove 12213, so that a pressure relief path is formed between the explosion-proof valve 22 and the weak point 121 within the fourth groove 12213.

[0085] In some embodiments, the second support portion 1223 can divide the third groove 12212 into a fourth groove 12213 and a fifth groove 12214, so that the weak portion 121 can be disposed in the fifth groove 12214, or disposed in both the fourth groove 12213 and the fifth groove 12214.

[0086] Please see Figure 6 , Figure 7 and Figure 8 In some embodiments, the bottom surface of the first groove 1221 is spaced apart from the end surface of the second end 212 of the battery cell body 21 by a preset distance, the preset distance being greater than or equal to 0.5 mm and less than or equal to 10 mm.

[0087] Thus, by setting the distance between the weak part 121 and the end face of the battery cell body 21 where the explosion-proof valve 22 is located between 0.5mm and 10mm, it is possible to avoid the failure of pressure relief caused by the blockage of the pressure relief path due to the small distance, and at the same time, it is possible to avoid the failure of pressure relief caused by the inability of the pressure relief pressure to break the weak part 121 due to the large distance.

[0088] Specifically, an explosion-proof valve 22 is provided on the end face of the second end 212 of the battery cell body 21 near the weak point 121, and a preset distance is maintained between the explosion-proof valve 22 and the bottom surface of the first groove 1221. This preset distance is greater than or equal to 0.5 mm and less than or equal to 10 mm; for example, the preset distance can be any value between 0.5 mm, 1.5 mm, 3.5 mm, 5.5 mm, 7.5 mm, 9.5 mm, 10 mm, or 0.5 mm to 10 mm. This allows a pressure relief path to be formed between the explosion-proof valve 22 and the weak point 121, and this pressure relief path allows the material ejected from the battery cell 20 to quickly flow out of the energy storage power supply 100, achieving rapid pressure relief.

[0089] Please refer to it again. Figure 5 In some embodiments, the energy storage power supply 100 includes a plurality of pressure relief structures 12, which are arranged in a staggered manner.

[0090] In this way, by setting multiple pressure relief structures 12 and staggering the arrangement of the pressure relief structures 12, it is possible to adapt to the number and position of the battery cells 20, and the pressure generated by multiple battery cells 20 during thermal runaway can be relieved by the corresponding pressure relief structure 12, thereby reducing the impact received by the pressure relief structure 12.

[0091] Specifically, the energy storage power supply 100 includes multiple pressure relief structures 12, which are staggered and arranged on the inner wall of the receiving cavity 11 of the energy storage power supply 100. The number of pressure relief structures 12 corresponds to the number of battery cells 20, and the positions of the multiple pressure relief structures 12 correspond to the positions of the battery cells 20, so that when each battery cell 20 experiences thermal runaway, there is a pressure relief structure 12 that can relieve the pressure.

[0092] Please refer to it again. Figure 3 In some embodiments, the energy storage power supply 100 includes a bus 40, which is electrically connected at a first end 211 of the cell body 21 to the positive terminal 23 of the cell 20 and the negative terminal 24 of another cell 20.

[0093] In this way, by setting up a busbar 40 to connect the positive terminal 23 and negative terminal 24 of multiple battery cells 20, multiple battery cells 20 can be connected in series to form current distribution and transmission.

[0094] Specifically, the energy storage power supply 100 also includes a busbar 40, which is a sheet-like connector made of conductive material, used to connect multiple battery cells 20 to form an integral conductive structure. For example, the busbar 40 can be made of conductive materials such as copper, aluminum, copper-aluminum alloys, and aluminum-magnesium alloys. The busbar 40 can connect the positive electrode 23 and negative electrode 24 of the battery cell 20 by welding. For example, the busbar 40 can be melted and adhered to the positive electrode 23 and negative electrode 24 of the battery cell 20 by spot welding, laser welding, or ultrasonic welding. Thus, the busbar 40 can connect the positive electrode 23 and negative electrode 24 of multiple battery cells 20, allowing the multiple battery cells 20 to be connected in series or parallel to meet the voltage and capacity requirements of different energy storage power supplies 100.

[0095] Please refer to it again. Figure 2 , Figure 4 and Figure 9 In some embodiments, the energy storage power supply 100 includes a bracket 50, which is connected to the inner wall of the receiving cavity 11, and the first end 211 of the cell body 21 is connected to the bracket 50.

[0096] Thus, by connecting the bracket 50 to the inner wall of the receiving cavity 11, and connecting the first end 211 of the battery cell body 21, which has a positive electrode 23 and a negative electrode 24, to the bracket 50, the battery cell 20 can be fixed to the bracket 50, thus preventing the battery cell 20 from moving and causing pressure relief failure.

[0097] Specifically, the energy storage power supply 100 also includes a bracket 50, which is used to fix the first end 211 of the battery cell 20, which is provided with a positive electrode 23 and a negative electrode 24. A sixth groove 51 is formed on the end face of the bracket 50 facing the battery cell 20 to accommodate the battery cell body 21. The first end 211 of the battery cell body 21, which is provided with the positive electrode 23 and the negative electrode 24, can be embedded in the sixth groove 51, thereby fixing the battery cell body 21 in place. Thus, by securing the battery cell body 21 in the sixth groove 51 of the bracket 50, the battery cell 20 can be fixed without requiring pre-set installation space, which helps to reduce the size of the energy storage power supply 100.

[0098] The bracket 50 can be connected to the inner wall of the receiving cavity 11. For example, a fixing post 53 is provided on the inner wall of the receiving cavity 11, and the fixing post 53 protrudes from the inner wall of the receiving cavity 11. A connecting post 52 is provided on the bracket 50, and the connecting post 52 is located on the side of the bracket 50 facing the fixing post 53. Thus, the connecting post 52 and the fixing post 53 can be connected to the inner wall of the receiving cavity 11 by means of bolt connection or snap connection.

[0099] In some embodiments, the first end 211 of the battery cell body 21, which has a positive electrode 23 and a negative electrode 24, can be connected to the bracket 50 by welding.

[0100] Please see Figure 2 , Figure 10 and Figure 11 In some embodiments, the battery cell 20 is a cylindrical battery cell 20, and the length direction of the battery cell 20 is substantially perpendicular to the height direction of the energy storage power supply 100. The energy storage power supply 100 includes multiple battery cells 20, and the multiple battery cells 20 form a battery module. The inverter 30 is disposed above the battery module in the height direction of the energy storage power supply 100.

[0101] Thus, by horizontally arranging the battery cells 20 within the energy storage power supply 100, the pressure relief path can be prevented from being blocked, thereby improving the pressure relief rate. By placing the inverter 30 above the battery module, the structure of the energy storage power supply 100 can be made compact, which helps to reduce the size of the energy storage power supply 100.

[0102] Specifically, the shape of the battery cell 20 can be a cylindrical battery cell 20, such as... Figure 2 As shown, the length direction L of the cylindrical battery cell 20 is substantially perpendicular to the height direction H of the energy storage power supply 100. Thus, the weak part 121 of the pressure relief structure 12 can be opened on the side of the energy storage power supply 100. In the event of thermal runaway of the battery cell 20, the weak part 121 will rupture, and the pressure relief path formed by the explosion-proof valve 22 and the weak part 121 can be unobstructed, thereby avoiding the pressure relief path being blocked during pressure relief, which would cause the pressure relief airflow to backflow and thus cause pressure relief failure.

[0103] The energy storage power supply 100 includes multiple battery cells 20, each of which contains two electrodes: a positive electrode 23 and a negative electrode 24. The multiple battery cells 20 can be connected together by series or parallel connection of the positive electrode 23 and the negative electrode 24 to form a battery module. The battery module can provide higher voltage or greater capacity to meet different energy storage needs.

[0104] Inverter 30 converts the DC power stored in the battery module into AC power for use by various loads. By positioning inverter 30 above the battery module in the height direction H of the energy storage power supply 100, the vertical space of the energy storage power supply 100 can be utilized more effectively, and the natural dissipation of heat generated by inverter 30 can be facilitated, as well as integration with the heat dissipation system of the energy storage power supply 100 can be made easier. Positioning inverter 30 above the battery module in the height direction H of the energy storage power supply 100 also facilitates the installation and removal of inverter 30 during disassembly and installation.

[0105] In the description of this specification, the references to terms such as "some embodiments," "in one example," "exemplarily," etc., indicate that a specific feature, structure, material, or characteristic described in connection with an 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. 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.

[0106] Although embodiments of this application have been shown and described above, it is understood that the above embodiments are optional and should not be construed as limiting this application. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of this application.

Claims

1. An energy storage power source, characterized in that, include: The housing has a receiving cavity, the inner wall of the receiving cavity has a plurality of first grooves, the bottom surface of the first grooves has a pressure relief structure, the pressure relief structure includes a weak part and a first support part; A plurality of battery cells, each battery cell comprising a battery cell body, an explosion-proof valve, a positive electrode, and a negative electrode, wherein the positive electrode and the negative electrode are located at a first end of the battery cell body, and the explosion-proof valve is located at a second end opposite to the battery cell body. The second end of the battery cell body is inserted into a first groove and abuts against a first support portion, such that the explosion-proof valve is spaced apart from the bottom surface and is disposed opposite to the weak portion. An inverter is disposed within the receiving cavity and is electrically connected to the battery cell; The weak point is configured to rupture under increased pressure in the first groove, thereby allowing the explosion-proof valve to communicate with the external environment of the housing.

2. The energy storage power supply according to claim 1, characterized in that, The weak part is the area where the wall thickness of the receiving cavity is reduced.

3. The energy storage power supply according to claim 1, characterized in that, The weak part is the area formed by the reduced wall thickness of the inner wall of the receiving cavity.

4. The energy storage power supply according to claim 1, characterized in that, The first support portion divides the first groove into a second groove and a third groove. The third groove is closer to the center of the first groove than the second groove. The weak portion is disposed in the third groove and / or the second groove.

5. The energy storage power supply according to claim 4, characterized in that, The first support portion is provided with a flexible pad, the second end of the battery cell abuts against the flexible pad to form a sealed third groove, the weak portion is provided in the third groove, and the explosion-proof valve is directly opposite the third groove.

6. The energy storage power supply according to claim 4, characterized in that, The pressure relief structure includes a plurality of weak points, which are disposed within the second groove and the third groove.

7. The energy storage power supply according to claim 4, characterized in that, The pressure relief structure includes a second support portion and a reinforcing rib. The second support portion is disposed in the third groove and divides the third groove into a fourth groove and a fifth groove. The reinforcing rib connects the first support portion and the second support portion. The weak portion is disposed in the fourth groove.

8. The energy storage power supply according to claim 7, characterized in that, The first support portion and the second support portion are annular protrusions that protrude from the inner wall of the receiving cavity toward the battery cell body.

9. The energy storage power supply according to claim 1, characterized in that, The bottom surface of the first groove is spaced at a preset distance from the end face of the second end of the battery cell body. The preset distance is greater than or equal to 0.5 mm and less than or equal to 10 mm.

10. The energy storage power supply according to claim 1, characterized in that, The energy storage power supply includes a bus, which is electrically connected at the first end of the cell body to the positive terminal of the cell and the negative terminal of another cell.

11. The energy storage power supply according to claim 1, characterized in that, The energy storage power supply includes a bracket, which is connected to the inner wall of the receiving cavity, and the first end of the battery cell body is connected to the bracket.

12. The energy storage power supply according to claim 11, characterized in that, The bracket is provided with a sixth groove, and the first end of the battery cell body is inserted into the sixth groove.

13. The energy storage power supply according to claim 1, characterized in that, The battery cell is a cylindrical cell, and the length direction of the battery cell is basically perpendicular to the height direction of the energy storage power source. Several of the battery cells form a battery module, and the inverter is located above the battery module in the height direction of the energy storage power source.

Images