Battery box and energy storage equipment

Abstract

The utility model provides a battery box and energy storage equipment. Comprising a box body, a battery bracket, a plurality of chips and a sampling assembly, the box body is provided with an accommodating space and comprises a top cover; the battery bracket is positioned in the accommodating space and is used for accommodating a plurality of battery cells; the plurality of chips are positioned in the accommodating space and are arranged on the battery bracket at intervals, and each chip is used for electrically connecting two adjacent battery cells; the sampling assembly is located in the containing space and located between the battery support and the top cover, the sampling assembly comprises a sampling plate and a plurality of electric connecting pieces, one end of each electric connecting piece is electrically connected with the sampling plate, and the other end of each electric connecting piece is electrically connected with one chip; and the battery bracket, the plurality of chips and the sampling assembly are connected to form an integrated structure. According to the technical scheme, the assembly difficulty of the energy storage battery box can be reduced.

Description

Technical Field

[0001] The present application relates to the field of energy storage technology, and in particular to a battery box and energy storage equipment. Background Art

[0002] With the continuous development of renewable energy such as wind energy and solar energy, the market demand for battery modules with electrochemical energy storage and release is also increasing. Energy storage battery boxes can convert electrical energy into other forms of energy through physical or chemical means and store it, and convert the energy into electrical energy when needed to release it, thereby meeting electricity demand. At present, the assembly process of energy storage battery boxes is relatively complicated, which increases the difficulty of assembling energy storage battery boxes. Utility Model Content

[0003] The embodiments of the present application provide a battery box and an energy storage device, which can reduce the difficulty of assembling the energy storage battery box.

[0004] In a first aspect, the present application provides a battery box, the battery box comprising:

[0005] A box body, wherein the box body has a receiving space and includes a top cover;

[0006] A battery holder, the battery holder is located in the receiving space and is used to accommodate a plurality of battery cells;

[0007] A plurality of tabs, the plurality of tabs being located in the receiving space and spaced apart on the battery holder, each tab being used to electrically connect two adjacent battery cells; and

[0008] A sampling assembly, the sampling assembly is located in the receiving space and between the battery holder and the top cover, the sampling assembly includes a sampling plate and a plurality of electrical connectors, one end of each of the electrical connectors is electrically connected to the sampling plate, and the other end of each of the electrical connectors is electrically connected to one of the bars;

[0009] The battery holder, the plurality of bars and the sampling assembly are connected to form an integrated structure.

[0010] On the one hand, by connecting the battery holder, multiple bars and the sampling assembly to form an integrated structure, the battery holder, multiple bars and the sampling assembly of the integrated structure can have fewer parts, which is conducive to simplifying the manufacturing process of the battery holder, multiple bars and the sampling assembly, and improving the production and assembly efficiency of the battery holder, multiple bars and the sampling assembly, thereby reducing the difficulty of assembling the battery box. On the other hand, by connecting the battery holder, multiple bars and the sampling assembly to form an integrated structure, the battery holder, multiple bars and the sampling assembly can be unified into a whole. Compared with the split structure of the battery holder, multiple bars and the sampling assembly, the integrated battery holder, multiple bars and the sampling assembly can further enhance the overall strength and rigidity of the battery holder, multiple bars and the sampling assembly, and have strong reliability.

[0011] In a possible implementation manner, the battery bracket includes a first bracket and a second bracket, the second bracket and the first bracket are arranged opposite to each other in the height direction of the battery box and are connected, a plurality of the battery cell arrays are arranged in the first bracket and the second bracket, and the first bracket, the plurality of the bars and the sampling assembly are connected to form an integrated structure;

[0012] The first bracket includes a first plate body and a plurality of first enclosing plates, wherein the plurality of first enclosing plates are arranged in an array on the first plate body, each of the first enclosing plates is annular and encloses the first plate body to form a first fixing groove;

[0013] The second bracket includes a second plate body and a plurality of second enclosing plates, wherein the plurality of second enclosing plates are arranged in an array on the second plate body, each of the second enclosing plates is annular and is enclosed with the second plate body to form a second fixing groove, and one of the second fixing grooves and one of the first fixing grooves are arranged opposite to each other in the height direction of the battery box;

[0014] One end of each of the battery cells is located in one of the first fixing grooves, and the other end of each of the battery cells is located in one of the second fixing grooves, the height of the first fixing groove is less than half the height of the battery cell accommodated in the first fixing groove, and the height of the second fixing groove is less than half the height of the battery cell accommodated in the second fixing groove.

[0015] In a possible implementation manner, among the plurality of first enclosures arranged in the same row along the length direction of the first bracket, two adjacent first enclosures are connected to each other;

[0016] The first bracket further includes a plurality of first connecting plates. Among the plurality of first enclosures arranged in the same row along the width direction of the first bracket, one first connecting plate is connected between two adjacent first enclosures.

[0017] In a possible implementation manner, the first plate body, four adjacent first enclosure plates, and two adjacent first connecting plates together form a first accommodating groove;

[0018] The first bracket also includes a plurality of first supporting structures, each of which is connected to the first plate body, a portion of each of which is located in one of the first receiving grooves, and another portion of each of which extends out of one of the first receiving grooves.

[0019] In a possible implementation manner, the first supporting structure includes a first supporting body and a second supporting body;

[0020] Among the four adjacent first enclosures, the first support body is connected between two of the first enclosures located on a diagonal line, and the cross-sectional width of the protruding portion of the first support body relative to the adjacent first enclosures along the length direction of the first bracket gradually decreases from the first enclosure to a direction away from the first enclosure;

[0021] The second support body is connected between the other two first enclosures located on another diagonal line, and the second support body is cross-arranged with the first support body. The cross-sectional width of the protruding part of the second support body relative to the adjacent first enclosure along the length direction of the first bracket gradually decreases from the first enclosure to the direction away from the first enclosure.

[0022] In a possible implementation manner, the first bracket has a plurality of first through hole groups, the plurality of first through hole groups are arranged at intervals on the first plate, and one first through hole group and one battery cell are arranged opposite to each other in the height direction of the battery box;

[0023] Each of the first through hole groups includes a negative pole welding hole, a first explosion-proof valve hole and a positive pole welding hole. The negative pole welding hole, the first explosion-proof valve hole and the positive pole welding hole all penetrate the first plate body along the thickness direction of the first plate body. The first explosion-proof valve hole and the positive pole welding hole are located on different sides of the negative pole welding hole. The negative pole welding hole exposes a pole of the battery cell, the first explosion-proof valve hole exposes an explosion-proof valve of the battery cell, and the positive pole welding hole exposes an end cover of the battery cell. The negative pole welding hole and the positive pole welding hole in the same first through hole group are respectively used to connect with different said bar pieces.

[0024] In a possible implementation manner, the first plate body includes a first surface and a second surface, the first surface and the second surface are arranged opposite to each other along a thickness direction of the first plate body, and the first enclosure is connected to the second surface;

[0025] The first bracket further includes a support platform, which is protruding from the first surface and extends along the length direction of the first bracket, and supports the sampling plate.

[0026] In a possible embodiment, the first bracket also includes a fixing member, which is protruded from a surface of the support platform facing away from the first plate body, and the fixing member is fixedly connected to the sampling plate to fix the sampling plate to the support platform, and the sampling plate and the first plate body are spaced apart in a height direction of the battery box.

[0027] In a possible embodiment, the first bracket further includes a first peripheral side plate and a plurality of first mounting portions, the first peripheral side plate is connected to the outer periphery of the first plate body and surrounds the plurality of first enclosure plates, the first peripheral side plate has a plurality of first recessed portions arranged at intervals, each of the first recessed portions is recessed toward the first plate body and forms a first groove, the plurality of first mounting portions are connected to one end of the first peripheral side plate away from the first plate body at intervals, and at least a portion of one of the first mounting portions is located in one of the first grooves;

[0028] The second bracket further includes a second peripheral side plate and a plurality of second mounting portions, the second peripheral side plate is connected to the outer peripheral edge of the second plate body and surrounds the plurality of second enclosure plates, the second peripheral side plate has a plurality of second recessed portions arranged at intervals, each of the second recessed portions is recessed toward the second plate body and forms a second groove, the plurality of second mounting portions are connected to one end of the second peripheral side plate away from the second plate body at intervals, at least a portion of one of the second mounting portions is located in the second groove, and is arranged opposite to one of the first mounting portions in the height direction of the battery box;

[0029] The battery box further includes a plurality of locking members, each of which is located in the first groove and the second groove and passes through one of the first mounting portions and one of the second mounting portions.

[0030] In a possible implementation manner, the first plate body includes a first surface and a second surface, the first surface and the second surface are arranged opposite to each other along the thickness direction of the first plate body, the first enclosure plate is connected to the second surface, and the first peripheral side plate is arranged to protrude relative to both the first surface and the second surface;

[0031] The first peripheral side plate and the first plate body are arranged to form a first installation groove, and the sampling component is located in the first installation groove.

[0032] In a possible implementation manner, the sampling plate includes a main body, a plurality of connecting parts, a plurality of first sections, and a plurality of second sections;

[0033] Each of the connecting parts is located on one side of the main body and is used to connect to an electrical connector, a first section is connected between one side of a connecting part and the main body, and a second section is connected between the other side of a connecting part and the main body, so that a stress release groove is formed between a connecting part and the main body, wherein the strength of the first section is less than the strength of the second section.

[0034] In a possible implementation, the battery box further includes a mica sheet, and the mica sheet is located in the first mounting groove and also between the sampling assembly and the top cover.

[0035] In a possible implementation, the mica sheet has a plurality of second explosion-proof valve holes spaced apart from each other, each of the second explosion-proof valve holes penetrates the mica sheet along the thickness direction of the mica sheet, and one of the first explosion-proof valve holes and one of the first explosion-proof valve holes are disposed opposite to each other in the height direction of the battery box.

[0036] In a possible implementation manner, the mica sheet further has a plurality of third grooves arranged at intervals, each of the third grooves accommodates at least a portion of one of the first recesses, and one of the third grooves and one of the first grooves are respectively located on both sides of one of the first recesses.

[0037] In a possible implementation, the battery box further includes a fire-fighting device, which is connected to the top cover and is located between the top cover and the mica sheet, and the fire-fighting device is provided with nozzles for spraying fire-extinguishing medium on both sides along the length direction of the battery box.

[0038] In a second aspect, the present application also provides an energy storage device, which includes a battery box as described above. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] Figure 1 It is an application scenario diagram of the energy storage device provided in the embodiment of the present application;

[0040] Figure 2 is a schematic diagram of the structure of a battery box provided in an embodiment of the present application;

[0041] Figure 3 yes Figure 2 An exploded schematic diagram of the battery box shown;

[0042] Figure 4 yes Figure 2 A schematic structural diagram of a battery box body shown;

[0043] Figure 5 yes Figure 4 A schematic structural diagram of a base of the box body at an angle shown;

[0044] Figure 6 yes Figure 4 A schematic structural diagram of an angle of the top cover of the box shown;

[0045] Figure 7 yes Figure 2 A schematic diagram of the assembly structure of the top cover of the battery box and the fire fighting device shown;

[0046] Figure 8 yes Figure 2 A schematic diagram of the structure of multiple cells of the battery box shown;

[0047] Fig. 9 yes Figure 8 A schematic diagram of the structure of a single battery cell is shown;

[0048] Fig.10 yes Figure 2 A schematic diagram of the assembly structure of a battery bracket and multiple battery cells of a battery box shown;

[0049] Fig.11 yes Figure 2 A schematic diagram of the structure of the battery bracket of the battery box shown;

[0050] Fig.12a yes Fig.11 The schematic structural diagram of the first bracket of the battery bracket at an angle is shown;

[0051] Figure 12b yes Fig.11 A schematic structural diagram of the first bracket of the battery bracket shown in another angle;

[0052] Fig.13a yes Fig.11 A schematic structural diagram of an angle of the second bracket of the battery bracket shown;

[0053] Fig.13b yes Fig.11 A schematic structural diagram of the second bracket of the battery bracket shown in another angle;

[0054] Fig.14 yes Figure 2 A schematic diagram of the assembly structure of the first bracket of the battery box, the sampling component and the plurality of bars is shown;

[0055] Fig.15 yes Fig.14 The schematic diagram of the structure of the bar piece shown;

[0056] Fig.16 yes Fig.14 A schematic diagram of the structure of the sampling assembly shown;

[0057] Fig.17 yes Figure 2The schematic diagram of the assembly of the first bracket of the battery box and the mica sheet is shown;

[0058] Fig.18 yes Fig.17 A schematic structural diagram of a mica sheet at one angle is shown.

[0059] Reference numerals:

[0060] Household energy storage system 300, electric energy conversion device 310, wind energy conversion device 320, first user load 330, energy storage device 200, battery box 100, the length direction of battery box 100 is X direction, the width direction of battery box 100 is Y direction, the height direction of battery box 100 is Z direction, box body 10, battery bracket 20, battery cell 30, sampling component 40, bar sheet 50, mica sheet 60, fire protection device 70, storage space W, top cover 11, base 12, plug Interface 121, first stopper 111, end cover 31, explosion-proof valve 32, pole 33, first bracket 21, second bracket 22, first plate 211, first enclosure 212, first connecting plate 213, first supporting structure 214, first peripheral side plate 215, first mounting portion 216, first through hole group A, partition 217, second stopper 218, support platform 219, fixing member 23, first surface 2111, second surface 2112, first fixing groove Q1, first container The first support body 2141, the second support body 2142, the first installation groove H1, the first recess 2151, the first groove C1, the negative electrode welding hole A1, the first explosion-proof valve hole A2, the positive electrode welding hole A3, the second plate 221, the second enclosure 222, the second connecting plate 223, the second support structure 224, the second peripheral side plate 225, the second installation portion 226, the second through hole group B, the through hole B1, the third surface 2211, the fourth surface 2212, the second fixed Fixed groove Q2, second accommodating groove T2, third support body 2241, fourth support body 2242, second installation groove H2, second recess 2251, second groove C2, locking piece 80, first sub-segment 51, second sub-segment 52, third sub-segment 53, card hole 511, sampling plate 41, electrical connector 42, main body 411, connecting part 412, first section 413, second section 414, positioning hole 4111, stress release groove D, second explosion-proof valve hole 61, third groove 62. DETAILED DESCRIPTION

[0061] For ease of understanding, the terms involved in the embodiments of the present application are first explained.

[0062] And / or: It is just a way to describe the association relationship of associated objects, indicating that there can be three relationships. For example, A and / or B can mean: A exists alone, A and B exist at the same time, and B exists alone.

[0063] Multiple: refers to two or more than two.

[0064] Connection: should be understood in a broad sense. For example, A and B are connected, which can be either direct or indirect through an intermediary.

[0065] The specific implementation of the present application will be clearly described below in conjunction with the accompanying drawings.

[0066] Since the energy people need is highly temporal and spatial, in order to rationally utilize energy and improve energy utilization, it is necessary to use a medium or device to store one form of energy in the same form or convert it into another form of energy, and then release it in a specific form of energy based on future application needs. As we all know, the main way to generate green electricity is to develop green energy such as photovoltaics and wind power to replace fossil energy. At present, the generation of green electricity generally relies on photovoltaics, wind power, water potential, etc., while wind and solar energy generally have problems of strong intermittency and large volatility, which will cause instability of the power grid, insufficient electricity during peak hours, too much electricity during low hours, and unstable voltage will also cause damage to electricity. Therefore, it may cause "wind and light abandonment" problems due to insufficient electricity demand or insufficient grid acceptance capacity. To solve these problems, energy storage must be relied on. That is, electrical energy is converted into other forms of energy by physical or chemical means and stored, and energy is converted into electrical energy and released when needed. In simple terms, energy storage is similar to a large "power bank". When photovoltaic and wind energy are sufficient, electrical energy is stored and the stored electricity is released when needed.

[0067] Taking electrochemical energy storage as an example, this solution provides an energy storage device 200 (such as Figure 1 As shown), the energy storage device 200 is provided with a chemical battery, which mainly utilizes the chemical elements in the chemical battery as the energy storage medium. The charging and discharging process is accompanied by the chemical reaction or change of the energy storage medium. In simple terms, the electric energy generated by wind energy and solar energy is stored in the chemical battery, and when the use of external electric energy reaches a peak, the stored electricity is released for use, or transferred to places where electricity is scarce for use.

[0068] At present, energy storage (i.e. energy storage) has a wide range of application scenarios, including (wind and solar) power generation side energy storage, grid side energy storage, base station side energy storage and user side energy storage. The corresponding types of energy storage devices include:

[0069] (1) Large energy storage containers used in grid-side energy storage scenarios can serve as high-quality active and reactive power regulation power sources in the grid, achieve load matching of electric energy in time and space, enhance the ability to absorb renewable energy, and are of great significance in grid system backup, relieving peak load power supply pressure, and peak and frequency regulation;

[0070] (2) Small and medium-sized energy storage cabinets used in industrial and commercial energy storage scenarios (banks, shopping malls, etc.) on the user side mainly operate in the "peak shaving and valley filling" mode. Since there is a large price difference in electricity charges at peak and valley locations according to electricity demand, after users have energy storage devices 200, in order to reduce costs, they usually charge the energy storage cabinets / boxes during the low electricity price period; during the peak electricity price period, the electricity in the energy storage device 200 is discharged for use to achieve the purpose of saving electricity bills.

[0071] See also Figure 1 , Figure 1 2 is an application scenario diagram of the energy storage device 200 provided in an embodiment of the present application. The embodiment of the present application takes the household energy storage scenario in the user-side energy storage as an example for explanation. The energy storage device 200 of the present application is not limited to the household energy storage scenario.

[0072] The present application provides a household energy storage system 300, which includes an electric energy conversion device 310 (photovoltaic panel), a wind energy conversion device 320 (windmill), a first user load 330 (base station), a second user load (not shown) (industrial and commercial side), etc. and an energy storage device 200, the energy storage device 200 also includes an energy storage cabinet, and the energy storage device 200 is installed in the energy storage cabinet for easy installation outdoors. Specifically, the electric energy conversion device 310 can convert solar energy into electric energy during the period of low electricity prices, and the energy storage device 200 is used to store the electric energy and supply it to the base station and the industrial and commercial side for use when the electricity price is peak, or to supply power when the power grid is off / out of power. The wind energy conversion device 320 (windmill) can convert wind energy into electric energy, and the energy storage device 200 is used to store the electric energy and supply it to the base station and the industrial and commercial side for use when the electricity price is peak, or to supply power when the power grid is off / out of power. Among them, the transmission of electric energy can be transmitted using high-voltage cables.

[0073] Please refer to Figure 1 and Figure 2 , Figure 2 1 is a schematic diagram of the structure of a battery box 100 provided in an embodiment of the present application. The energy storage device may include multiple battery boxes 100, and the multiple battery boxes 100 may be stacked along the height direction of the energy storage device. The multiple battery boxes 100 may be fixedly connected and electrically connected to each other.

[0074] Please refer to Figure 2 and Figure 3 , Figure 3 yes Figure 2 An exploded schematic diagram of the battery box 100 is shown.

[0075] In the implementation of the present application, for ease of understanding, the length direction of the battery box 100 is defined as the X direction, the width direction of the battery box 100 is defined as the Y direction, and the height direction of the battery box 100 is defined as the Z direction. The X direction, the Y direction, and the Z direction are perpendicular to each other.

[0076] The battery box 100 may include a box body 10, a battery holder 20, a plurality of battery cells 30, a sampling assembly 40, a plurality of bar sheets 50, a mica sheet 60 and a fire fighting device 70. The box body 10 has a receiving space W, and the receiving space W can be used to accommodate the battery holder 20, a plurality of battery cells 30, the sampling assembly 40, a plurality of bar sheets 50, a mica sheet 60 and a fire fighting device 70, so as to protect the above-mentioned components from interference from the external environment and provide good protection performance. A plurality of battery cells 30 are received and fixed inside the battery holder 20. A plurality of bar sheets 50 are connected to the battery holder 20 and are located outside the battery holder 20. Each bar sheet 50 is electrically connected to two adjacent battery cells 30 to achieve electrical connection between the two adjacent battery cells 30. The sampling assembly 40 is connected to the battery holder 20 and is located outside the battery holder 20. The sampling assembly 40 is also electrically connected to the plurality of bar sheets 50 to achieve electrical connection with the plurality of battery cells 30 through the plurality of bar sheets 50. The sampling assembly 40 is used to collect parameter information such as temperature and voltage of multiple battery cells 30. The mica sheet 60 is located between the sampling assembly 40 and the box body 10, and plays the role of insulation and heat insulation. The fire-fighting device 70 is located between the mica sheet 60 and the box body 10, and can extinguish the fire by spraying a fire-extinguishing medium when the battery box 100 catches fire, thereby improving the safety performance of the battery box 100.

[0077] Please refer to Figure 4 , Figure 5 and Figure 6 , Figure 4 yes Figure 2 The schematic structural diagram of the box body 10 of the battery box 100 is shown in FIG. Figure 5 yes Figure 4 The schematic diagram of the structure of the base 12 of the box body 10 at an angle is shown. Figure 6 yes Figure 4 The schematic diagram of the structure of the top cover 11 of the box body 10 at an angle is shown. The box body 10 may include the top cover 11 and the base 12.

[0078] The base 12 may be in the shape of a rectangular box, with an opening at one end of the base 12. The base 12 may also have a plug port 121, which may penetrate the wall of the base 12 along the thickness direction of the wall of the base 12 and connect the inside of the base 12 and the outside of the base 12. The plug port 121 may be used for extending the plug in the battery box 100, so as to realize the electrical connection between the battery box 100 and other battery boxes 100 or other structural parts. Exemplarily, the number of the plug ports 121 may be two, and the two plug ports 121 may be arranged opposite to each other along the Y direction.

[0079] The top cover 11 covers one end of the base 12 with an opening, and closes the opening of the base 12. The top cover 11 and the base 12 enclose a receiving space W of the box body 10. The inner surface of the top cover 11 may be provided with a first stopper 111. One end of the first stopper 111 is connected to the inner surface of the top cover 11, and the other end of the first stopper 111 extends in a direction away from the top cover 11. The first stopper 111 is used to limit and fix the fire-fighting device 70 to limit the movement of the fire-fighting device 70 relative to the top cover 11 along the X direction and the Y direction. Among them, the inner surface of the top cover 11 is the surface of the top cover 11 facing the base 12. Exemplarily, the number of the first stopper 111 may be four, and the four first stoppers 111 may be arranged at intervals in the central area of ​​the inner surface of the top cover 11. When the fire-fighting device 70 is connected to the inner surface of the top cover 11, the four first stoppers 111 are located at the four corners of the fire-fighting device 70 to better limit the movement of the fire-fighting device 70. The first limiting member 111 may also have a receiving hole (not shown), and the receiving hole is used to install a fire extinguishing medium, such as aerosol.

[0080] See also Figure 7 , Figure 7 yes Figure 2 The schematic diagram of the assembly structure of the top cover 11 of the battery box 100 and the fire fighting device 70 is shown.

[0081] The fire-fighting device 70 is located in the receiving space W of the box body 10, and is connected to the inner surface of the top cover 11, and is limited and fixed by the first limiter 111 provided on the inner surface of the top cover 11. Both sides of the fire-fighting device 70 along the X direction may be provided with nozzles for spraying the fire-extinguishing medium, so that the fire-fighting device 70 can spray the fire-extinguishing medium to both the left and right sides, thereby increasing the spraying area of ​​the fire-fighting device 70. Exemplarily, the fire-fighting device 70 may be located in the central area of ​​the inner surface of the top cover 11. The fire-fighting device 70 may be an aerosol fire extinguisher. The fire-extinguishing medium may be an aerosol.

[0082] It is understandable that the battery box 100 is provided with a plurality of battery cells 30 for energy storage, and the plurality of battery cells 30 will generate heat energy inside when working. In order to prevent and reduce the risk of explosion caused by excessive internal pressure or temperature of the battery cell 30. The battery cell 30 is usually provided with an explosion-proof valve 32 so that the heat generated after thermal runaway of the battery cell 30 and the electrolyte can be ejected from the explosion-proof valve 32. However, the electrolyte ejected to the top surface of the battery cell 30 is prone to cause safety accidents, for example, the electrolyte is prone to cause ignition of the battery box 100, causing fire, or the electrolyte causes the battery cell 30 to short-circuit. In the embodiment of the present application, by providing a fire-fighting device 70, the fire can be extinguished by spraying a fire-extinguishing medium when a fire occurs, which effectively prevents the occurrence of a fire in the battery box 100, and is conducive to improving the overall protection performance of the battery box 100.

[0083] Please refer to Figure 3 , Figure 8 and Fig. 9 , Figure 8 yes Figure 2 The schematic diagram of the structure of multiple battery cells 30 of the battery box 100 shown in FIG. Fig. 9 yes Figure 8 A schematic structural diagram of a single battery cell 30 is shown.

[0084] Multiple battery cells 30 are fixed inside the battery holder 20 and arranged in an array inside the battery holder 20. Multiple battery cells 30 in the same row can be arranged in sequence along the X direction, and multiple battery cells 30 in the same column can be arranged in sequence along the Y direction, so that multiple battery cells 30 form a rectangular array. Each battery cell 30 may include an end cap 31, an explosion-proof valve 32, and a pole 33. The pole 33 is mounted on the end cap 31 and is protruded relative to the end cap 31 in the Z direction. The pole 33 can be electrically connected to a bar 50 as an electrode lead of the battery cell 30. The explosion-proof valve 32 is mounted on the end cap 31 and is spaced apart from the pole 33 on the end cap 31. The explosion-proof valve 32 can eject the heat and electrolyte generated by the battery cell 30 after the battery cell 30 has thermal runaway. Exemplarily, the battery cell 30 may be a cylindrical battery cell 30. The number of the battery cells 30 may be thirty-two, and the thirty-two battery cells 30 form a rectangular array of four rows and eight columns in the battery holder 20 .

[0085] like Figure 8 As shown, in an array composed of a plurality of battery cells 30, a plurality of poles 33 of a plurality of battery cells 30 in the same row can be sequentially arranged along the X direction, and a plurality of explosion-proof valves 32 of a plurality of battery cells 30 in the same row can be sequentially arranged along the X direction. In two adjacent battery cells 30 in the same column, the explosion-proof valve 32 of one battery cell 30 is spaced apart from the pole 33 of the battery cell 30 in the opposite direction of the Y direction, and the explosion-proof valve 32 of the other battery cell 30 is spaced apart from the pole 33 of the battery cell 30 in the Y direction.

[0086] Please refer to Fig.10 and Fig.11 , Fig.10 yes Figure 2 The schematic diagram of the assembly structure of the battery holder 20 and the multiple battery cells 30 of the battery box 100 is shown in FIG. Fig.11 yes Figure 2 A schematic structural diagram of a battery bracket 20 of a battery box 100 is shown.

[0087] The battery holder 20 is located in the receiving space W of the box body 10. The battery holder 20 may include a first holder 21 and a second holder 22. The second holder 22 and the first holder 21 may be arranged relative to each other along the Z direction, and the first holder 21 is closer to the top cover 11 of the box body 10 than the second holder 22. A plurality of battery cells 30 are arranged in an array in the first holder 21 and the second holder 22, and the second holder 22 and the first holder 21 are fixedly connected to lock the plurality of battery cells 30 inside the battery holder 20.

[0088] Please refer to Fig.12a and Figure 12b , Fig.12a yes Fig.11 The schematic diagram of the structure of the first bracket 21 of the battery bracket 20 at an angle is shown. Figure 12b yes Fig.11 A schematic structural diagram of another angle of the first bracket 21 of the battery bracket 20 shown. The first bracket 21 may include a first plate body 211, a plurality of first enclosure plates 212, a plurality of first connection plates 213, a plurality of first support structures 214, a first peripheral side plate 215, a plurality of first mounting portions 216, a plurality of first through hole groups A, a plurality of partitions 217, a plurality of second stoppers 218, a support platform 219 and a fixing member 23.

[0089] The first plate body 211 may include a first surface 2111 and a second surface 2112. The first surface 2111 of the first plate body 211 is a surface of the first plate body 211 facing the top cover 11, and the second surface 2112 of the first plate body 211 is a surface of the first plate body 211 facing the second bracket 22. The first surface 2111 of the first plate body 211 and the second surface 2112 of the first plate body 211 may be disposed opposite to each other along the thickness direction of the first plate body 211.

[0090] A plurality of first panels 212 are connected to the second surface 2112 of the first plate body 211, and the plurality of first panels 212 are arranged in an array on the second surface 2112 of the first plate body 211. Among the plurality of first panels 212 arranged in the same row along the length direction (i.e., the X direction) of the first bracket 21, two adjacent first panels 212 are connected to each other. Under this arrangement, the plurality of first panels 212 can be connected to form a whole, thereby enhancing the structural strength of the first bracket 21, and providing stronger support for the plurality of battery cells 30.

[0091] Each first enclosure 212 can be connected end to end to form a closed ring structure. Each first enclosure 212 and the first plate body 211 enclose a first fixing groove Q1, and a first fixing groove Q1 can be used to fix one end of a battery cell 30. Exemplarily, the first fixing groove Q1 can be circular, and the number of the first fixing grooves Q1 can be thirty-two, and the thirty-two first fixing grooves Q1 form a rectangular array of four rows and eight columns in the battery holder 20.

[0092] The height of the first fixing groove Q1 (i.e., the dimension of the first fixing groove Q1 along the Z direction) may be less than half the height of the battery cell 30 accommodated in the first fixing groove Q1 (i.e., the dimension of the battery cell 30 along the Z direction). It is understandable that by making the height of the first fixing groove Q1 less than half the height of the battery cell 30 accommodated in the first fixing groove Q1, the materials required for preparing the first bracket 21 can be reduced on the basis of fixing the battery cell 30, thereby reducing the manufacturing cost of the first bracket 21. In addition, since part of one end of the battery cell 30 is located in the first fixing groove Q1 and part is exposed outside the first fixing groove Q1, the heat dissipation area of ​​the battery cell 30 can be increased on the basis of fixing the battery cell 30, which is beneficial to improving the heat dissipation performance of the battery cell 30.

[0093] A plurality of first connecting plates 213 are all connected to the second surface 2112 of the first plate body 211. Each first connecting plate 213 can be connected between two adjacent first enclosures 212 arranged in the same row along the Y direction. In other words, among the plurality of first enclosures 212 arranged in the same row along the width direction (i.e., the Y direction) of the first bracket 21, two adjacent first enclosures 212 can be connected to each other through one first connecting plate 213. Exemplarily, the height of the first connecting plate 213 (i.e., the dimension of the first connecting plate 213 along the Z direction) can be less than or equal to the height of the first enclosure 212 (i.e., the dimension of the first enclosure 212 along the Z direction).

[0094] It can be understood that by setting a first connecting plate 213 between two adjacent first enclosures 212 and connecting two adjacent first enclosures 212 with one first connecting plate 213, each first connecting plate 213 can be used as a reinforcing structure between two adjacent first enclosures 212, so that multiple first enclosures 212 are connected to form a whole and play a reinforcing role, so as to enhance the structural strength of the first bracket 21 and provide stronger support for multiple battery cells 30.

[0095] A plurality of first support structures 214 are connected to the second surface 2112 of the first plate body 211, and at least a portion of each first support structure 214 may be located in the gap region between four adjacent first enclosures 212 and connect the four adjacent first enclosures 212. Specifically, the first plate body 211, the four adjacent first enclosures 212 and the two adjacent first connecting plates 213 may enclose and form a first receiving groove T1. A portion of a first support structure 214 is located in a first receiving groove T1, and another portion of a first support structure 214 extends out of the first receiving groove T1 and is located outside the first receiving groove T1. That is, a portion of a first support structure 214 is located in the first receiving groove T1, and another portion of a first support structure 214 is protruded in the opposite direction of the adjacent first enclosure 212 along the X direction. The height of a first support structure 214 (i.e., the dimension of the first support structure 214 along the Z direction) is greater than the height of a first receiving groove T1 (i.e., the dimension of the first receiving groove T1 along the Z direction).

[0096] It is understandable that, since a portion of the first support structure 214 is located in the first receiving groove T1 and another portion thereof protrudes relative to the first receiving groove T1, the first support structure 214 can be in contact with or have a gap with the second bracket 22 when the first bracket 21 and the second bracket 22 are butt-connected, so as to stabilize the plurality of battery cells 30 and stabilize the structure of the entire battery bracket 20.

[0097] Among the multiple first support structures 214, a portion of the first support structures 214 may only occupy part of the space of the first receiving groove T1, and the cross-sectional dimensions of the protruding portions relative to the adjacent first enclosure 212 along the X direction gradually decrease from the first enclosure 212 to the direction away from the first enclosure 212. Among the multiple first support structures 214, another portion of the first support structures 214 may completely fill the space in the first receiving groove T1, and the cross-sectional dimensions of the protruding portions relative to the adjacent first enclosure 212 along the X direction are the same from the first enclosure 212 to the direction away from the first enclosure 212.

[0098] Exemplarily, the number of first supporting structures 214 that do not completely occupy the space within the first receiving groove T1 can be eighteen, the number of first supporting structures 214 that completely fill the space within the first receiving groove T1 can be three, and the three first supporting structures 214 that completely fill the space within the first receiving groove T1 can be respectively located in the central area and left and right sides of the first plate body 211.

[0099] When the first support structure 214 only occupies part of the space of the first receiving groove T1, and the cross-sectional dimension of the protruding portion along the X direction relative to the adjacent first enclosure 212 gradually decreases from the first enclosure 212 to the direction away from the first enclosure 212, the first support structure 214 may include a first support body 2141 and a second support body 2142. Among the four adjacent first enclosures 212, the first support body 2141 is connected between two first enclosures 212 located on a diagonal line, and the cross-sectional width of the first support body 2141 along the length direction of the first bracket 21 (i.e., the X direction) relative to the protruding portion of the adjacent first enclosure 212 gradually decreases from the first enclosure 212 to the direction away from the first enclosure 212. The second support body 2142 is connected between the other two first enclosures 212 located on another diagonal line, and the second support body 2142 is arranged crosswise with the first support body 2141. The cross-sectional width of the protruding portion of the second support body 2142 relative to the adjacent first enclosure plate 212 along the length direction (ie, X direction) of the first bracket 21 gradually decreases from the first enclosure plate 212 toward a direction away from the first enclosure plate 212 .

[0100] It is understandable that by arranging the first support structure 214 in the gap area between four adjacent first enclosures 212, the first support structure 214 can be arranged by utilizing the idle space in the first bracket 21, which can not only effectively improve the space utilization of the first bracket 21, but also enhance the overall strength of the first bracket 21. The cross-sectional width of the protruding portion of the first support structure 214 relative to the adjacent first enclosure 212 along the X direction is gradually reduced from the first enclosure 212 to the direction away from the first enclosure 212, so that the first support structure 214 can be in a plum blossom cone shape, so as to better play a role in stabilizing the battery cell 30 when the first bracket 21 and the second bracket 22 are locked.

[0101] Please continue reading Fig.12a and Figure 12b The first peripheral side plate 215 can be connected to the outer peripheral edge of the first plate body 211, and the first peripheral side plate 215 is arranged around the circumferential direction of the first plate body 211. The first peripheral side plate 215 can be protruded relative to the first surface 2111 of the first plate body 211, and is surrounded by the first plate body 211 to form a first installation groove H1, and the first installation groove H1 is used to accommodate the sampling assembly 40 and the mica sheet 60. It can be understood that since the first peripheral side plate 215 is protruded relative to the first surface 2111 of the first plate body 211, the first peripheral side plate 215 can be used as a baffle located at the periphery of the first plate body 211, and limit the movement of the sampling assembly 40 and the mica sheet 60 located in the area surrounded by the first peripheral side plate 215, so that the sampling assembly 40 and the mica sheet 60 are not prone to shaking, slipping and other misalignment problems.

[0102] The first peripheral side plate 215 may also be arranged to protrude relative to the second surface 2112 of the first plate body 211, and the first peripheral side plate 215 surrounds a plurality of first enclosure plates 212. Specifically, the protruding height of a portion of the first peripheral side plates 215 relative to the second surface 2112 of the first plate body 211 is greater than the protruding height of the first enclosure plate 212 relative to the second surface 2112 of the first plate body 211. The protruding height of another portion of the first peripheral side plates 215 relative to the second surface 2112 of the first plate body 211 is equal to the protruding height of the first enclosure plate 212 relative to the second surface 2112 of the first plate body 211.

[0103] The first peripheral side plate 215 may have a plurality of first recesses 2151. A portion of the plurality of first recesses 2151 may be located on one side of the first peripheral side plate 215 along the Y direction, and another portion of the plurality of first recesses 2151 may be located on the other side of the first peripheral side plate 215 along the Y direction. The plurality of first recesses 2151 located on the same side of the first peripheral side plate 215 may be arranged at intervals along the X direction, and each first recess 2151 is recessed toward the direction of the first plate body 211 and forms a first groove C1, and a first groove C1 may be used to install a first mounting portion 216. Exemplarily, the number of the first recesses 2151 may be six, three first recesses 2151 are located on one side of the first peripheral side plate 215 along the Y direction and are arranged at intervals, and the other three first recesses 2151 are located on the other side of the first peripheral side plate 215 along the Y direction and are arranged at intervals.

[0104] A plurality of first mounting portions 216 are spaced apart and connected to one end of the first peripheral side plate 215 away from the first plate body 211. At least a portion of a first mounting portion 216 is located in a first groove C1, and the first mounting portion 216 is used to provide a connection position for fixing the first bracket 21 and the second bracket 22.

[0105] Please continue reading Fig.12a and Figure 12b , multiple first through hole groups A are arranged at intervals on the first plate body 211, and a first through hole group A is arranged opposite to a battery cell 30 in the height direction of the battery module. Each first through hole group A includes a negative pole welding hole A1, a first explosion-proof valve hole A2 and a positive pole welding hole A3. Among them, the negative pole welding hole A1, the first explosion-proof valve hole A2 and the positive pole welding hole A3 all penetrate the first plate body 211 along the thickness direction of the first plate body 211 and are connected to the first fixing groove Q1. Exemplarily, the number of the first through hole groups A can be thirty-two.

[0106] In a first through hole group A, the negative electrode column welding hole A1 exposes a pole 33 of a battery cell 30, the first explosion-proof valve hole A2 exposes an explosion-proof valve 32 of a battery cell 30, and the positive electrode column welding hole A3 exposes a portion of the end cover 31 of a battery cell 30. The first explosion-proof valve hole A2 and the positive electrode column welding hole A3 are located on different sides of the negative electrode column welding hole A1. The negative electrode column welding hole A1 and the positive electrode column welding hole A3 in the same first through hole group A are respectively used to connect to different tabs 50.

[0107] It can be understood that by setting a plurality of first through hole groups A on the first plate body 211, the pole 33, the explosion-proof valve 32 and the end cover 31 of each battery cell 30 installed inside the first bracket 21 and the second bracket 22 can be exposed through a first through hole group A, so that a plurality of tabs 50 can be connected to a plurality of battery cells 30, thereby achieving electrical connection between the plurality of battery cells 30 through the plurality of tabs 50.

[0108] Multiple partitions 217 may all be protruding from the first surface 2111 of the first plate body 211. One partition 217 is disposed in the area where a first through hole group A is located, and is located between a negative pole welding hole A1 and a positive pole welding hole A3 of a first through hole group A. In the gap area between two adjacent partitions 217, a positive pole welding hole A3 of a first through hole group A and a negative pole welding hole A1 of another first through hole group A may be provided. The gap area between two adjacent partitions 217 may be used to accommodate a tab 50, so that the tab 50 connects the pole 33 of one battery cell 30 and the end cover 31 of the other battery cell 30 of two adjacent battery cells 30.

[0109] It can be understood that in the same first through hole group A, the negative electrode column welding hole A1 and the positive electrode column welding hole A3 are respectively connected to two different bar pieces 50, and the two different bar pieces 50 are prone to discharge effect due to their adjacent positions. Therefore, a partition 217 is provided between the negative electrode column welding hole A1 and the positive electrode column welding hole A3, which can effectively separate the negative electrode column welding hole A1 and the positive electrode column welding hole A3, so as to isolate the adjacent bar pieces 50, play a good spacing role, and avoid the discharge effect between the adjacent bar pieces 50.

[0110] The plurality of second stoppers 218 may be convexly disposed on the first surface 2111 of the first plate body 211. At least two second stoppers 218 may be disposed in the gap region between two adjacent partitions 217, and the at least two second stoppers 218 may be staggered in both the X direction and the Y direction. The at least two second stoppers 218 may limit the movement of a bar 50 accommodated in the gap region between two adjacent partitions 217 along the Y direction to prevent the position of the bar 50 from shaking.

[0111] The support platform 219 may be protruding from the first surface 2111 of the first plate 211 and surrounded by a plurality of first through hole groups A. The support platform 219 may extend along the length direction (i.e., the X direction) of the first bracket 21, and the support platform 219 may support the sampling assembly 40. Exemplarily, the number of the support platforms 219 may be multiple, such as four. Among the four support platforms 219, two support platforms 219 are located on one side of the first plate 211 along the Y direction and are spaced apart, and the other two support platforms 219 are located on the forest side of the first plate 211 along the Y direction and are spaced apart.

[0112] It can be understood that by providing a support platform 219 on the first plate body 211, support can be provided for the sampling component 40, and at least a portion of the sampling component 40 can be suspended relative to the first plate body 211, so that the suspended portion of the sampling component 40 relative to the first plate body 211 has a higher degree of deformation freedom.

[0113] The fixing member 23 is protruding from the surface of the support platform 219 away from the first plate body 211, and the fixing member 23 is fixedly connected to the sampling plate 41 of the sampling assembly 40 to fix the sampling plate 41 to the support platform 219. Exemplarily, the number of the fixing members 23 can be multiple, and the multiple fixing members 23 are distributed on the support platform 219 at intervals.

[0114] It is understandable that by providing the fixing member 23 on the support platform 219 , the sampling component 40 can be fixedly connected to the support platform 219 through the fixing member 23 , thereby further improving the connection stability and reliability between the support platform 219 and the sampling component 40 .

[0115] Please refer to Fig.13a and Fig.13b , Fig.13a yes Fig.11 The schematic diagram of the structure of the second bracket 22 of the battery bracket 20 at an angle is shown. Fig.13b yes Fig.11 The schematic diagram of the structure of the second bracket 22 of the battery bracket 20 at another angle is shown. The second bracket 22 may include a second plate body 221, a plurality of second enclosure plates 222, a plurality of second connecting plates 223, a plurality of second supporting structures 224, a second peripheral side plate 225, a plurality of second mounting portions 226 and a plurality of second through hole groups B.

[0116] The second plate body 221 may include a third surface 2211 and a fourth surface 2212. The third surface 2211 of the second plate body 221 is a surface of the second plate body 221 facing the first bracket 21, and the fourth surface 2212 of the second plate body 221 is a surface of the second plate body 221 facing away from the first bracket 21. The third surface 2211 of the second plate body 221 and the fourth surface 2212 of the second plate body 221 may be disposed opposite to each other along the thickness direction of the second plate body 221.

[0117] A plurality of second panels 222 are connected to the third surface 2211 of the second plate body 221, and the plurality of second panels 222 are arranged in an array on the third surface 2211 of the second plate body 221. Among the plurality of second panels 222 arranged in the same row along the length direction (i.e., the X direction) of the second bracket 22, two adjacent second panels 222 are connected to each other. Under this arrangement, the plurality of second panels 222 can be connected to form a whole, thereby enhancing the structural strength of the second bracket 22, and providing stronger support for the plurality of battery cells 30.

[0118] Each second enclosing plate 222 can be connected end to end to form a closed ring structure. Each second enclosing plate 222 and the second plate body 221 enclose a second fixing groove Q2, and a second fixing groove Q2 can be used to fix the other end of a battery cell 30. Exemplarily, the second fixing groove Q2 can be circular, and the number of the second fixing grooves Q2 can be thirty-two, and the thirty-two second fixing grooves Q2 form a rectangular array of four rows and eight columns in the battery holder 20.

[0119] The height of the second fixing groove Q2 (i.e., the dimension of the second fixing groove Q2 along the Z direction) can be less than half the height of the battery cell 30 accommodated in the second fixing groove Q2 (i.e., the dimension of the battery cell 30 along the Z direction). It can be understood that by making the height of the second fixing groove Q2 less than half the height of the battery cell 30 accommodated in the second fixing groove Q2, the material required for preparing the second bracket 22 can be reduced on the basis of fixing the battery cell 30, thereby reducing the manufacturing cost of the second bracket 22. In addition, since part of one end of the battery cell 30 is located in the second fixing groove Q2 and part is exposed outside the second fixing groove Q2, the heat dissipation area of ​​the battery cell 30 can be increased on the basis of fixing the battery cell 30, which is conducive to improving the heat dissipation performance of the battery cell 30.

[0120] The plurality of second connecting plates 223 are all connected to the third surface 2211 of the second plate body 221. Each second connecting plate 223 can be connected between two adjacent second enclosures 222 arranged in the same row along the Y direction. In other words, among the plurality of second enclosures 222 arranged in the same row along the width direction (i.e., the Y direction) of the second bracket 22, two adjacent second enclosures 222 can be connected to each other through one second connecting plate 223. Exemplarily, the height of the second connecting plate 223 (i.e., the size of the second connecting plate 223 along the Z direction) can be less than or equal to the height of the second enclosure 222 (i.e., the size of the second enclosure 222 along the Z direction).

[0121] It can be understood that by setting a second connecting plate 223 between two adjacent second enclosures 222 and connecting two adjacent second enclosures 222 with a second connecting plate 223, each second connecting plate 223 can be used as a reinforcing structure between two adjacent second enclosures 222, so that multiple second enclosures 222 are connected to form a whole and play a reinforcing role, so as to enhance the structural strength of the second bracket 22 and provide stronger support for multiple battery cells 30.

[0122] A plurality of second support structures 224 are all connected to the third surface 2211 of the second plate body 221, and one second support structure 224 is arranged opposite to one first support structure 214 in the Z direction. At least part of each second support structure 224 can be located in the gap area between four adjacent second enclosures 222, and connect the four adjacent second enclosures 222. Specifically, the second plate body 221, the four adjacent second enclosures 222 and the two adjacent second connecting plates 223 can enclose and form a second receiving groove T2. A part of a second support structure 224 is located in a second receiving groove T2, and another part of a second support structure 224 extends out of the second receiving groove T2 and is located outside the second receiving groove T2. That is, a part of a second support structure 224 is located in the second receiving groove T2, and another part of a second support structure 224 is arranged to protrude relative to the adjacent second enclosure 222 along the X direction. The height of one second supporting structure 224 (ie, the dimension of the second supporting structure 224 along the Z direction) is greater than the height of one second containing groove T2 (ie, the dimension of the second containing groove T2 along the Z direction).

[0123] It is understandable that, since a portion of the second support structure 224 is located in the second receiving groove T2 and another portion thereof protrudes relative to the second receiving groove T2, the second support structure 224 can be in contact with or have a gap with the first bracket 21 when the second bracket 22 and the first bracket 21 are docked and connected, so as to stabilize the plurality of battery cells 30 and stabilize the structure of the entire battery bracket 20.

[0124] Among the plurality of second support structures 224, a portion of the second support structures 224 may occupy only a portion of the space of the second accommodation groove T2, and the cross-sectional dimension along the X direction relative to the protruding portion of the adjacent second enclosure 222 gradually decreases from the second enclosure 222 to the direction away from the second enclosure 222. Among the plurality of second support structures 224, another portion of the second support structures 224 may completely fill the space in the second accommodation groove T2, and the cross-sectional dimension along the X direction relative to the protruding portion of the adjacent second enclosure 222 is the same from the second enclosure 222 to the direction away from the second enclosure 222.

[0125] Exemplarily, the number of second support structures 224 that do not completely occupy the space within the second accommodating groove T2 can be eighteen, the number of second support structures 224 that completely fill the space within the second accommodating groove T2 can be three, and the three second support structures 224 that completely fill the space within the second accommodating groove T2 can be respectively located in the central area and left and right sides of the second plate body 221.

[0126] When the second support structure 224 only occupies part of the space of the second receiving groove T2, and the cross-sectional dimension of the protruding portion relative to the adjacent second enclosure 222 along the X direction gradually decreases from the second enclosure 222 to the direction away from the second enclosure 222, the second support structure 224 may include a third support body 2241 and a fourth support body 2242. Among the four adjacent second enclosures 222, the third support body 2241 is connected between two second enclosures 222 located on a diagonal line, and the cross-sectional width of the third support body 2241 relative to the protruding portion of the adjacent second enclosure 222 along the length direction of the second bracket 22 (i.e., the X direction) gradually decreases from the second enclosure 222 to the direction away from the second enclosure 222. The fourth support body 2242 is connected between the other two second enclosures 222 located on another diagonal line, and the fourth support body 2242 is arranged crosswise with the second support body 2142. The cross-sectional width of the protruding portion of the fourth support body 2242 relative to the adjacent second enclosure plate 222 along the length direction (ie, X direction) of the second bracket 22 gradually decreases from the second enclosure plate 222 toward a direction away from the second enclosure plate 222 .

[0127] It is understandable that the second support structure 224 is arranged in the gap area between four adjacent second enclosures 222, and the second support structure 224 can be arranged by utilizing the idle space in the second bracket 22, which can not only effectively improve the space utilization of the second bracket 22, but also enhance the overall strength of the second bracket 22. The cross-sectional width of the protruding portion of the second support structure 224 relative to the adjacent second enclosure 222 along the X direction is gradually reduced from the second enclosure 222 to the direction away from the second enclosure 222, so that the second support structure 224 can be in a plum blossom cone shape, so as to better stabilize the battery cell 30 when the second bracket 22 is locked with the second bracket 22.

[0128] Please continue reading Fig.12a and Figure 12bThe second peripheral side plate 225 can be connected to the outer periphery of the second plate body 221, and the second peripheral side plate 225 is arranged around the circumferential direction of the second plate body 221. The second peripheral side plate 225 can be arranged to protrude relative to the third surface 2211 of the second plate body 221, and the second peripheral side plate 225 surrounds a plurality of second enclosure plates 222. Specifically, the protruding height of a portion of the second peripheral side plate 225 relative to the third surface 2211 of the second plate body 221 is greater than the protruding height of the second enclosure plate 222 relative to the third surface 2211 of the second plate body 221. The protruding height of another portion of the second peripheral side plate 225 relative to the third surface 2211 of the second plate body 221 is equal to the protruding height of the second enclosure plate 222 relative to the third surface 2211 of the second plate body 221.

[0129] The second peripheral side plate 225 can also be protruded relative to the fourth surface 2212 of the second plate body 221, and surrounded by the second plate body 221 to form a second installation groove H2, and the second installation groove H2 is used to accommodate other structural parts in the battery module. It can be understood that since the second peripheral side plate 225 is protruded relative to the fourth surface 2212 of the second plate body 221, the second peripheral side plate 225 can be used as a baffle located at the periphery of the second plate body 221, and limit the movement of the structural parts located in the area surrounded by the second peripheral side plate 225, so that the structural parts located in the area surrounded by the second peripheral side plate 225 are not prone to shaking, slipping and other misalignment problems.

[0130] The second peripheral side plate 225 may have a plurality of second recesses 2251, and one first recess 2151 may be arranged opposite to one first recess 2151 in the Z direction. A portion of the plurality of second recesses 2251 may be located on one side of the second peripheral side plate 225 along the Y direction, and another portion of the plurality of second recesses 2251 may be located on the other side of the second peripheral side plate 225 along the Y direction. The plurality of second recesses 2251 located on the same side of the second peripheral side plate 225 may be arranged at intervals along the X direction, and each second recess 2251 is recessed toward the direction of the second plate body 221 and forms a second groove C2, and a second groove C2 may be used to install a second mounting portion 226. Exemplarily, the number of the second recesses 2251 may be six, three second recesses 2251 are located on one side of the second peripheral side plate 225 along the Y direction and are arranged at intervals, and the other three second recesses 2251 are located on the other side of the second peripheral side plate 225 along the Y direction and are arranged at intervals.

[0131] A plurality of second mounting portions 226 are connected to one end of the second peripheral side plate 225 away from the second plate body 221 at intervals, and one second mounting portion 226 can be arranged opposite to one first mounting portion 216 in the Z direction. At least a portion of one second mounting portion 226 is located in one second groove C2, and the second mounting portion 226 is used to provide a connection position for the fixed connection between the second bracket 22 and the second bracket 22.

[0132] Please continue reading Fig.12a and Figure 12b , multiple second through hole groups B are arranged at intervals on the second plate body 221, and one second through hole group B is arranged opposite to one battery cell 30 in the height direction of the battery module. Each second through hole group B includes two through holes B1. The two through holes B1 are mirror-imaged and both penetrate the second plate body 221 along the thickness direction of the second plate body 221. Exemplarily, the number of the second through hole groups B can be thirty-two. The shape of the through hole can be semicircular.

[0133] Please refer again Fig.11 The battery module may further include a plurality of locking members 80, each of which is located in the first groove C1 of the first bracket 21 and the second groove C2 of the second bracket 22, and is passed through a first mounting portion 216 of the first bracket 21 and a second mounting portion 226 of the second bracket 22. Under this arrangement, the first bracket 21 and the second bracket 22 can be locked, thereby improving the connection stability and reliability of the first bracket 21 and the second bracket 22.

[0134] Please refer to Fig.14 and Fig.15 , Fig.14 yes Figure 2 The schematic diagram of the assembly structure of the first bracket 21 of the battery box 100, the sampling assembly 40 and the plurality of bars 50 is shown in FIG. Fig.15 yes Fig.14 A schematic structural diagram of the bar piece 50 is shown.

[0135] A plurality of tabs 50 are located in the receiving space W of the box 10 and are spaced apart on the first surface 2111 of the first bracket 21. Each tab 50 is used to electrically connect two adjacent battery cells 30 and to distribute the current. Each tab 50 may include a first sub-segment 51, a second sub-segment 52, and a third sub-segment 53. The third sub-segment 53 and the first sub-segment 51 may be spaced apart in the Z direction, and the second sub-segment 52 is bent and connected between the first sub-segment 51 and the third sub-segment 53.

[0136] The first sub-segment 51 can be used to connect with the pole 33 of one of the two adjacent battery cells 30. The first sub-segment 51 can have at least two clamping holes 511, and one clamping hole 511 is used to accommodate a second stopper 218 of a first bracket 21, so that the tab 50 can be clamped with the second stopper 218, thereby improving the position stability of the tab 50. The second sub-segment 52 can extend into the first bracket 21 through the positive pole welding hole A3, and is used to connect with the end cover 31 of the other of the two adjacent battery cells 30.

[0137] Please refer to Fig.14 and Fig.16 , Fig.16 yes Fig.14 The schematic diagram of the structure of the sampling assembly 40 shown. The sampling assembly 40 can be located in the receiving space W of the box body 10 and in the first mounting groove H1 of the first bracket 21. The sampling assembly 40 may include a sampling plate 41 and a plurality of electrical connectors 42. The sampling plate 41 may be connected to the surface of the support table 219 facing away from the first plate body 211, and extend along the X direction, and be spaced apart from the first plate body 211 in the opposite direction of the Z direction. One end of each electrical connector 42 is electrically connected to the sampling plate 41, and the other end of each electrical connector 42 is electrically connected to a bar 50. Exemplarily, the number of sampling plates 41 may be two, and the two sampling plates 41 may be arranged opposite to each other along the X direction. One sampling plate 41 may be connected to seventeen electrical connectors 42, and another sampling plate 41 may be connected to sixteen electrical connectors 42.

[0138] Specifically, the sampling plate 41 may include a main body 411, a plurality of connecting parts 412, a plurality of first sections 413 and a plurality of second sections 414. The main body 411 may extend along the X direction. The main body 411 may have a positioning hole 4111, and the positioning hole 4111 may be used for the fixing member 23 of the first bracket 21 to pass through, so as to fix the sampling plate 41 on the first bracket 21. Exemplarily, the number of the positioning holes 4111 may be multiple, such as three. The plurality of positioning holes 4111 are arranged at intervals, and one positioning hole 4111 is used for one positioning member to pass through. The plurality of connecting parts 412 may be located on both sides of the main body 411 along the Y direction. The plurality of connecting parts 412 may be connected to the main body 411 through the plurality of first sections 413 and the plurality of second sections 414.

[0139] Each connecting portion 412 is located at one side of the main body 411 and is used to connect to an electrical connector 42. A first section 413 is connected between one side of a connecting portion 412 and the main body 411, and a second section 414 is connected between the other side of a connecting portion 412 and the main body 411, so that a stress release groove D can be formed between a connecting portion 412 and the main body 411. The strength of the first section 413 is less than that of the second section 414, so that the first section 413 is easier to break than the second section 414. The strength of the first section 413 refers to the ability of the first section 413 to resist damage by external forces, and the strength of the second section 414 refers to the ability of the second section 414 to resist damage by external forces.

[0140] It is understandable that, since the structural strength of the second section 414 is greater than that of the first section 413, when the battery cell 30 expands and causes the electrical connector 42 to tilt, the first section 413 will first be broken (such as partially broken or completely broken). When the first section 413 is broken, the connecting portion 412 can still be connected to the main body 411 through the second section 414 to reduce or avoid the phenomenon that the connecting portion 412 has too large a deformation amount and causes the connecting portion 412 to be folded. In addition, relative to the way in which the electrical connector 42 is connected to the sampling plate 41 as a whole, the connecting portion 412 is connected to the main body 411 through the first section 413 and the second section 414, which can ensure that the connecting portion 412 is in a connected state with the main body 411, so that the connecting portion 412 can have a certain degree of freedom and deformation space, such as tilting relative to the main body 411. Therefore, a certain displacement can be provided for the expansion of the battery cell 30, and the connection reliability of the sampling plate 41 and the electrical connector 42 is improved.

[0141] In the embodiment of the present application, the battery holder 20, the plurality of tabs 50 and the sampling assembly 40 are connected to form an integrated structure. The battery holder 20, the plurality of tabs 50 and the sampling assembly 40 are connected to form an integrated structure, which may be an integrated structure formed by the battery holder 20, the plurality of tabs 50 and the sampling assembly 40 by integral molding. Alternatively, the battery holder 20, the plurality of tabs 50 and the sampling assembly 40 are connected to form an integrated structure, which may be an integrated structure formed by the battery holder 20, the plurality of tabs 50 and the sampling assembly 40 by assembly methods such as welding and bonding.

[0142] Further, the first bracket 21, the plurality of bar pieces 50 and the sampling component 40 are connected to form an integrated structure. The first bracket 21, the plurality of bar pieces 50 and the sampling component 40 are connected to form an integrated structure, which may be an integrated structure formed by the first bracket 21, the plurality of bar pieces 50 and the sampling component 40 through an integrated molding method. Alternatively, the first bracket 21, the plurality of bar pieces 50 and the sampling component 40 are connected to form an integrated structure, which may be an integrated structure formed by the first bracket 21, the plurality of bar pieces 50 and the sampling component 40 through an assembly method such as welding or bonding.

[0143] On the one hand, the first bracket 21, the plurality of bar pieces 50 and the sampling assembly 40 are connected to form an integrated structure, so that the first bracket 21, the plurality of bar pieces 50 and the sampling assembly 40 of the integrated structure have fewer parts, which is conducive to simplifying the manufacturing process of the first bracket 21, the plurality of bar pieces 50 and the sampling assembly 40, improving the production and assembly efficiency of the first bracket 21, the plurality of bar pieces 50 and the sampling assembly 40, thereby reducing the assembly difficulty of the battery box 100. On the other hand, the first bracket 21, the plurality of bar pieces 50 and the sampling assembly 40 are connected to form an integrated structure, so that the first bracket 21, the plurality of bar pieces 50 and the sampling assembly 40 are unified into a whole. Compared with the split structure of the first bracket 21, the plurality of bar pieces 50 and the sampling assembly 40, the integrated first bracket 21, the plurality of bar pieces 50 and the sampling assembly 40 can further enhance the overall strength and rigidity of the first bracket 21, the plurality of bar pieces 50 and the sampling assembly 40, and have strong reliability.

[0144] Please refer to Fig.17 and Fig.18 , Fig.17 yes Figure 2 The schematic diagram of the assembly of the first bracket 21 of the battery box 100 and the mica sheet 60 is shown in FIG. Fig.18 yes Fig.17 The structure diagram of the mica sheet 60 is shown at an angle.

[0145] The mica sheet 60 may be located in the receiving space W of the box 10, and installed in the first installation slot H1 of the first bracket 21, and also located between the sampling assembly 40 and the top cover 11. It is understandable that since the mica sheet 60 has insulation and low-loss thermal resistance functions, the mica sheet 60 is provided between the sampling assembly 40 and the top cover 11 to insulate the sampling assembly 40 from the top cover 11 and to insulate the sampling assembly 40 from the top cover 11.

[0146] Specifically, the mica sheet 60 may have a plurality of second explosion-proof valve holes 61 arranged at intervals, and each second explosion-proof valve hole 61 penetrates the mica sheet 60 along the thickness direction of the mica sheet 60. A first explosion-proof valve hole A2 is arranged opposite to a first explosion-proof valve hole A2 of the first bracket 21 in the opposite direction of the Z direction. A second explosion-proof valve hole 61 is connected to a first explosion-proof valve hole A2, so that the heat and electrolyte generated by the battery cell 30 are ejected therefrom after the battery cell 30 has thermal runaway.

[0147] The mica sheet 60 may also have a plurality of third grooves 62. The plurality of third grooves 62 are located on both sides of the mica sheet 60 along the Y direction, and each third groove 62 may be recessed toward the center of the mica sheet 60. When the mica sheet 60 is located in the first mounting groove H1 of the first bracket 21, one side of the mica sheet 60 is the sampling assembly 40, and the other side of the mica sheet 60 is the firefighting device 70. Each third groove 62 accommodates at least part of the first recess 2151 of the first bracket 21, and a third groove 62 and a first groove C1 are located on both sides of a first recess 2151, respectively. Under this arrangement, the shape of the mica sheet 60 can fit the first mounting groove H1 of the first bracket 21, which is conducive to improving the connection performance between the mica sheet 60 and the first bracket 21.

[0148] The embodiments of the present application are introduced in detail above. Specific examples are used in this article to illustrate the principles and implementation methods of the present application. The description of the above embodiments is only used to help understand the method and core idea of ​​the present application. At the same time, for general technical personnel in this field, according to the idea of ​​the present application, there will be changes in the specific implementation method and application scope. In summary, the content of this specification should not be understood as a limitation on the present application.

Claims

1. A battery box, characterized in that: The battery box comprises: A box body, wherein the box body has a receiving space and includes a top cover; A battery holder, the battery holder is located in the receiving space and is used to accommodate a plurality of battery cells; A plurality of tabs, the plurality of tabs being located in the receiving space and spaced apart on the battery holder, each tab being used to electrically connect two adjacent battery cells; and A sampling assembly, the sampling assembly is located in the receiving space and between the battery holder and the top cover, the sampling assembly includes a sampling plate and a plurality of electrical connectors, one end of each of the electrical connectors is electrically connected to the sampling plate, and the other end of each of the electrical connectors is electrically connected to one of the bars; The battery holder, the plurality of bars and the sampling assembly are connected to form an integrated structure.

2. The battery box according to claim 1, characterized in that: The battery bracket includes a first bracket and a second bracket, the second bracket is arranged opposite to and connected to the first bracket in the height direction of the battery box, a plurality of the battery cell arrays are arranged in the first bracket and the second bracket, and the first bracket, the plurality of the bar sheets and the sampling assembly are connected to form an integrated structure; The first bracket includes a first plate body and a plurality of first enclosing plates, wherein the plurality of first enclosing plates are arranged in an array on the first plate body, each of the first enclosing plates is annular and encloses the first plate body to form a first fixing groove; The second bracket includes a second plate body and a plurality of second enclosing plates, wherein the plurality of second enclosing plates are arranged in an array on the second plate body, each of the second enclosing plates is annular and is enclosed with the second plate body to form a second fixing groove, and one of the second fixing grooves and one of the first fixing grooves are arranged opposite to each other in the height direction of the battery box; One end of each of the battery cells is located in one of the first fixing grooves, and the other end of each of the battery cells is located in one of the second fixing grooves, the height of the first fixing groove is less than half the height of the battery cell accommodated in the first fixing groove, and the height of the second fixing groove is less than half the height of the battery cell accommodated in the second fixing groove.

3. The battery box according to claim 2, characterized in that: Among the plurality of first enclosures arranged in the same row along the length direction of the first bracket, two adjacent first enclosures are connected to each other; The first bracket further includes a plurality of first connecting plates. Among the plurality of first enclosures arranged in the same row along the width direction of the first bracket, one first connecting plate is connected between two adjacent first enclosures.

4. The battery box according to claim 3, characterized in that: The first plate body, four adjacent first enclosure plates and two adjacent first connecting plates together form a first accommodating groove; The first bracket also includes a plurality of first supporting structures, each of which is connected to the first plate body, a portion of each of which is located in one of the first receiving grooves, and another portion of each of which extends out of one of the first receiving grooves.

5. The battery box according to claim 4, characterized in that: The first support structure includes a first support body and a second support body; Among the four adjacent first enclosures, the first support body is connected between two of the first enclosures located on a diagonal line, and the cross-sectional width of the protruding portion of the first support body relative to the adjacent first enclosures along the length direction of the first bracket gradually decreases from the first enclosure to a direction away from the first enclosure; The second support body is connected between the other two first enclosures located on another diagonal line, and the second support body is cross-arranged with the first support body. The cross-sectional width of the protruding part of the second support body relative to the adjacent first enclosure along the length direction of the first bracket gradually decreases from the first enclosure to the direction away from the first enclosure.

6. The battery box according to any one of claims 2 to 5, characterized in that: The first bracket has a plurality of first through hole groups, and the plurality of first through hole groups are arranged at intervals on the first plate body; Each of the first through hole groups includes a negative pole welding hole, a first explosion-proof valve hole and a positive pole welding hole. The negative pole welding hole, the first explosion-proof valve hole and the positive pole welding hole all penetrate the first plate body along the thickness direction of the first plate body. The first explosion-proof valve hole and the positive pole welding hole are located on different sides of the negative pole welding hole. The negative pole welding hole exposes a pole of the battery cell, the first explosion-proof valve hole exposes an explosion-proof valve of the battery cell, and the positive pole welding hole exposes a partial end cover of the battery cell. The negative pole welding hole and the positive pole welding hole in the same first through hole group are respectively used to connect with different said bar pieces.

7. The battery box according to any one of claims 2 to 5, characterized in that: The first plate body comprises a first surface and a second surface, the first surface and the second surface are arranged opposite to each other along the thickness direction of the first plate body, and the first enclosure is connected to the second surface; The first bracket further includes a support platform, which is protruding from the first surface and extends along the length direction of the first bracket, and supports the sampling plate.

8. The battery box according to claim 7, characterized in that: The first bracket also includes a fixing member, which is protruding from the surface of the support platform away from the first plate body, and the fixing member is fixedly connected to the sampling plate to fix the sampling plate to the support platform. The sampling plate and the first plate body are spaced apart in the height direction of the battery box.

9. The battery box according to claim 6, characterized in that: The first bracket further includes a first peripheral side plate and a plurality of first mounting portions, the first peripheral side plate being connected to the outer periphery of the first plate body and surrounding the plurality of first enclosure plates, the first peripheral side plate having a plurality of first recessed portions arranged at intervals, each of the first recessed portions being recessed toward the first plate body and forming a first groove, the plurality of first mounting portions being connected at intervals to one end of the first peripheral side plate away from the first plate body, and at least a portion of one of the first mounting portions being located in one of the first grooves; The second bracket further includes a second peripheral side plate and a plurality of second mounting portions, the second peripheral side plate is connected to the outer peripheral edge of the second plate body and surrounds the plurality of second enclosure plates, the second peripheral side plate has a plurality of second recessed portions arranged at intervals, each of the second recessed portions is recessed toward the second plate body and forms a second groove, the plurality of second mounting portions are connected to one end of the second peripheral side plate away from the second plate body at intervals, at least a portion of one of the second mounting portions is located in the second groove, and is arranged opposite to one of the first mounting portions in the height direction of the battery box; The battery box further includes a plurality of locking members, each of which is located in the first groove and the second groove and passes through one of the first mounting portions and one of the second mounting portions.

10. The battery box according to claim 9, characterized in that: The first plate body comprises a first surface and a second surface, the first surface and the second surface are arranged opposite to each other along the thickness direction of the first plate body, the first enclosure plate is connected to the second surface, and the first peripheral side plate is arranged protruding relative to the first surface and the second surface; The first peripheral side plate and the first plate body are arranged to form a first installation groove, and the sampling component is located in the first installation groove.

11. The battery box according to claim 10, characterized in that: The sampling plate comprises a main body, a plurality of connecting parts, a plurality of first sections and a plurality of second sections; Each of the connecting parts is located on one side of the main body and is used to connect to an electrical connector, a first section is connected between one side of a connecting part and the main body, and a second section is connected between the other side of a connecting part and the main body, so that a stress release groove is formed between a connecting part and the main body, wherein the strength of the first section is less than the strength of the second section.

12. The battery box according to claim 10 or 11, characterized in that: The battery box also includes a mica sheet, which is located in the first mounting groove and also between the sampling assembly and the top cover.

13. The battery box according to claim 12, characterized in that: The mica sheet has a plurality of second explosion-proof valve holes arranged at intervals, each of the second explosion-proof valve holes penetrates the mica sheet along the thickness direction of the mica sheet, and one of the first explosion-proof valve holes and one of the first explosion-proof valve holes are arranged opposite to each other in the height direction of the battery box.

14. The battery box according to claim 12, characterized in that: The mica sheet also has a plurality of third grooves arranged at intervals, each of the third grooves accommodates at least a portion of one of the first recesses, and one of the third grooves and one of the first grooves are respectively located on two sides of one of the first recesses.

15. The battery box according to claim 12, characterized in that: The battery box also includes a fire-fighting device, which is connected to the top cover and located between the top cover and the mica sheet. The fire-fighting device is provided with nozzles for spraying fire-extinguishing media on both sides along the length direction of the battery box.

16. An energy storage device, characterized in that: The energy storage device comprises a battery box as described in any one of claims 1-15.

Images