Soft package battery and battery pack

Abstract

The utility model relates to the technical field of batteries, and provides a soft package battery and a battery pack, and the soft package battery comprises a soft package battery monomer, a top cover, a shell and a fastener. The tabs of the soft package battery monomers are electrically connected with the conductive terminals of the top cover; a placement cavity and a mounting opening communicated with the placement cavity are formed in the shell, the soft package battery monomers are arranged in the placement cavity, and the top cover covers the mounting opening; the fastener penetrates through the shell and the top cover so as to connect the shell and the top cover. The soft package battery and the battery pack provided by the utility model are relatively low in manufacturing cost.

Description

Technical Field

[0001] The present application relates to the field of battery technology, and in particular to a soft-pack battery and a battery pack. Background Art

[0002] New energy batteries are increasingly used in life and industry. New energy batteries are not only used in energy storage power systems such as hydropower, thermal power, wind power and solar power stations, but are also widely used in electric vehicles such as electric bicycles, electric motorcycles and electric cars.

[0003] In the related art, the shell and the top cover of the soft-pack battery are connected by welding, which is relatively costly. Utility Model Content

[0004] In view of this, the embodiments of the present application hope to provide a soft-pack battery and a battery pack with low manufacturing cost.

[0005] In order to achieve the above-mentioned purpose, the technical solution of the embodiment of the present application is implemented as follows:

[0006] On one hand, an embodiment of the present application discloses a soft-pack battery, which includes a soft-pack battery cell, a top cover, a shell and a fastener. The pole ear of the soft-pack battery cell is electrically connected to the conductive terminal of the top cover. The shell is formed with a placement cavity and a mounting port connected to the placement cavity, the soft-pack battery cell is arranged in the placement cavity, and the top cover is arranged at the mounting port. The fastener is passed through the shell and the top cover to connect the shell and the top cover.

[0007] In the above technical solution, by forming a placement cavity in the shell, the soft-pack battery monomer is placed in the placement cavity. On the one hand, the soft-pack battery monomer can be protected to a certain extent and the service life of the soft-pack battery monomer can be improved; on the other hand, the connection method of the soft pack can be changed to the connection method of the square shell to simplify the subsequent assembly of the battery pack, which is more convenient to operate. The pole ear of the soft-pack battery is electrically connected to the conductive terminal of the top cover, the top cover is set at the installation port, and the fastener is passed through the shell and the top cover to connect the shell with the top cover. In this way, the shell and the top cover are connected by fasteners. Compared with the form of welding, the embodiment of the present application does not need to set a metal welding plate. In this way, not only can the manufacturing cost of the soft-pack battery be reduced, but the connection method using fasteners is also relatively simple and has high production efficiency.

[0008] In one embodiment, the shell is formed with a first mounting hole, the top cover is formed with a second mounting hole, and the fastener is passed through the first mounting hole and the second mounting hole to connect the top cover and the shell.

[0009] In the above technical solution, the shell and the top cover are connected by passing the fastener through the first mounting hole and the second mounting hole. On the one hand, the structure is simple, the operation is convenient, and no complicated process or tools are required; on the other hand, the cooperation between the fastener and the first mounting hole and the second mounting hole can increase the stronger pulling force or pressure, thereby ensuring the connection strength and stability; on the other hand, the cooperation between the fastener and the first mounting hole and the second mounting hole can be applicable to shells and top covers of different materials and different thicknesses, and has strong versatility.

[0010] In one embodiment, the fastener is a rivet, and the rivet connects the top cover and the shell by riveting.

[0011] In the above embodiment, by inserting the rivet into the first mounting hole and the second mounting hole, the rivet can then be pressed between the shell and the top cover by a riveting device to achieve a fixed connection with high connection strength, which can effectively ensure the stability between the shell and the top cover; on the other hand, the rivet riveting connection method has good seismic and impact resistance, and can resist external vibration and impact to maintain the stability of the connection; on another hand, compared with welding and other methods, the rivet riveting connection method is simple and quick to operate, the connection can be completed quickly, and the installation efficiency is high.

[0012] In one embodiment, the number of the first mounting holes, the second mounting holes and the fasteners are at least two, at least two first mounting holes are circumferentially spaced apart on the shell, at least two second mounting holes are correspondingly arranged on the top cover, and each fastener is passed through the corresponding first mounting hole and the corresponding second mounting hole.

[0013] In the above technical solution, by arranging a plurality of first mounting holes at circumferential intervals on the shell, a plurality of second mounting holes are correspondingly arranged on the circumference of the top cover, and each fastener is passed through the corresponding first mounting hole and the corresponding second mounting hole. On the one hand, the connection strength between the shell and the top cover can be further improved, and the loosening or damage of the connection caused by vibration can be reduced; on the other hand, by adopting multiple fasteners to connect along the circumference, the gap at the connection between the shell and the top cover can be reduced, and the air tightness of the placement cavity can be improved.

[0014] In one embodiment, the second mounting hole is a waist-shaped hole.

[0015] In the above technical solution, by setting the second mounting hole as a waist-shaped hole, on the one hand, it is convenient to align the first mounting hole with the second mounting hole, reducing the difficulty of assembling the fastener and improving the installation efficiency; on the other hand, by setting the second mounting hole as a waist-shaped hole, compared with setting the first mounting hole as a waist-shaped hole, it is possible to avoid the situation where the air tightness of the placement cavity is reduced.

[0016] In one embodiment, the top cover includes a cover body and an abutment plate, the abutment plate is connected to the top surface of the cover body, the projection area of ​​the cover body along the top and bottom directions is located within the projection area of ​​the abutment plate, and a second mounting hole is formed on the cover body near the abutment plate. When the first mounting hole is aligned with the second mounting hole, the cover body is located in the placement cavity, and the top surface of the shell abuts against the bottom surface of the abutment plate.

[0017] In the above technical solution, on the one hand, by abutting the top surface of the shell with the bottom surface of the abutment plate, the positioning between the shell and the top cover can be quickly completed, which facilitates the alignment of the first mounting hole and the second mounting hole and makes assembly more convenient; on the other hand, by abutting the top surface of the shell with the bottom surface of the abutment plate, the abutment plate can block the gap between the cover body and the shell to a certain extent, thereby improving the airtightness of the placement cavity.

[0018] In one embodiment, the shell includes a first side panel, a second side panel and a third side panel, and the first side panel and the second side panel are connected to both ends of the third side panel along its width direction; the first side panel and the second side panel are both formed with folded edges at one end away from the third side panel, and the two folded edges overlap each other to jointly define a placement cavity.

[0019] In the above technical solution, since the shell is U-shaped before installation, the soft-pack battery cell connected with the top cover can be placed into the shell from the opening of the U-shaped shell, and then the top surface of the shell is abutted against the bottom surface of the abutment plate, and the position is adjusted to align the first mounting hole with the second mounting hole. After alignment, the folded edges of the first side plate and the second side plate are overlapped facing each other, and finally the shell and the top shell are connected by fasteners inserted through the first mounting hole and the second mounting hole. In this way, compared with the related art of directly inserting the soft-pack battery cell into the shell with the placement cavity, the embodiment of the present application adopts the method of enclosing and wrapping, which can not only reduce the damage of the shell to the soft-pack battery cell, and improve the service life of the soft-pack battery cell, but also make the assembly simpler.

[0020] In one embodiment, the two folded edges are connected by welding.

[0021] In the above technical solution, the two folded edges are connected by welding, which can improve the connection strength between the two folded edges, reduce the occurrence of cracks that lead to reduced airtightness of the placement cavity, and have good working stability.

[0022] In one embodiment, the shell is formed with a connecting port connected to the placement cavity, the installation port and the connecting port are arranged along the top-to-bottom direction, the soft-pack battery includes a bottom cover and a shielding member, the bottom cover is arranged on the connecting port, the top cover is formed with a pressure relief port running through the top-to-bottom direction, the shielding member is arranged at the pressure relief port, and the pressure bearing capacity of the shell and the bottom cover are both greater than the pressure bearing capacity of the shielding member.

[0023] In the above technical solution, by setting a bottom cover at the bottom connecting port and setting a shielding member at the top pressure relief port, impurities and hot erupting gases can be prevented from entering the placement cavity and being transmitted to the soft-pack battery monomer, so as to avoid serious thermal runaway problems in the soft-pack battery. By setting the pressure bearing capacity of the shielding member to be less than the pressure bearing capacity of the shell and less than the pressure bearing capacity of the bottom cover, when the soft-pack battery monomer undergoes thermal runaway, the erupting gas can first rupture the shielding member to eject the gas from the pressure relief port in a directional manner, so as to avoid explosion or rupture of the soft-pack battery.

[0024] In one embodiment, the shielding member and the bottom cover are both made of mica, the pressure bearing capacity of the mica of the shielding member is smaller than that of the mica of the bottom cover, and the shell is made of metal or plastic.

[0025] In the above technical solution, by setting the material of the shielding member and the bottom cover to mica, the material of the shell is metal or plastic, and the pressure bearing capacity of the mica of the shielding member is smaller than the pressure bearing capacity of the mica of the bottom cover, in this way, when thermal runaway occurs in the soft-pack battery cell, the gas can break through the shielding member with lower pressure bearing capacity and be ejected from the pressure relief port, so as to realize directional eruption of the soft-pack battery.

[0026] On the other hand, an embodiment of the present application discloses a battery pack, which includes a box body and the soft-pack battery of any one of the above embodiments. A receiving cavity is formed in the box body, and the soft-pack battery is located in the receiving cavity.

[0027] In the above technical solution, fasteners are used to connect the shell and the top cover to form a soft-pack battery, and then the soft-pack battery is placed in the box. This not only reduces the manufacturing cost of the battery pack, but also simplifies assembly and improves production efficiency.

[0028] In one embodiment, the shell is formed with a connecting port connected to the placement cavity, the installation port and the connecting port are arranged along the top-bottom direction, the soft-pack battery includes a bottom cover, the bottom cover is arranged on the connecting port, and the top cover is formed with a pressure relief port running through the top-bottom direction.

[0029] In the above technical solution, by setting a pressure relief port on the top cover, the pressure relief port is connected to the placement cavity. When the soft-pack battery cell undergoes thermal runaway, the high-temperature eruption (hot eruption gas) can be directed out from the pressure relief port to avoid explosion or rupture of the soft-pack battery, and to avoid the high temperature of the eruption being transmitted to other soft-pack batteries in the battery pack, which is highly safe. The pressure relief port and the conductive terminal are set on the top cover, so that the conductive terminal can be monitored and inspected at the same time as the pressure relief port.

[0030] In one embodiment, the number of soft-pack batteries is at least two, at least one of which is a first soft-pack battery, and at least one of which is a second soft-pack battery, and a side of the first soft-pack battery having a conductive terminal is disposed away from a side of the second soft-pack battery having a conductive terminal.

[0031] In the above technical solution, the side of the first soft-pack battery with the conductive terminal and the side of the second soft-pack battery with the conductive terminal are arranged to be separated from each other, which can reduce the high-voltage accumulation at the conductive terminal while achieving directional eruption, so as to avoid the risk of thermal runaway, short circuit or even explosion caused by the high-voltage accumulation of the first soft-pack battery and the second soft-pack battery, and has high safety.

[0032] In one embodiment, the first soft-pack battery and the second soft-pack battery are arranged along the top-to-bottom direction, the number of the first soft-pack battery and the second soft-pack battery are both multiple, the multiple first soft-pack batteries are arranged at intervals along the first direction, and the multiple second soft-pack batteries are arranged at intervals along the first direction, wherein the top-to-bottom direction is arranged crosswise with the first direction.

[0033] In the above technical solution, through the cross-setting, the impact on other soft-pack batteries in the battery pack can be reduced after thermal runaway occurs.

[0034] In one embodiment, the battery pack further includes an insulating layer, the space between each first soft-pack battery and the corresponding second soft-pack battery is filled with the insulating layer, and the insulating layer covers the first soft-pack battery and the second soft-pack battery respectively.

[0035] In the above technical solution, by providing an insulating layer between the side of the first soft-pack battery away from its conductive terminal and the side of the second soft-pack battery away from its conductive terminal, on the one hand, the first soft-pack battery and the second soft-pack battery are insulated to reduce the possibility of short circuit between the two; on the other hand, taking the first soft-pack battery as an example, when thermal runaway occurs in the soft-pack battery monomer, since the pressure relief port is located on the side of the first soft-pack battery away from the insulating layer, when the eruption material erupts from the pressure relief port, a force is applied to the first soft-pack battery to move toward the second soft-pack battery, and the insulating layer can be provided to block and support it to avoid affecting other soft-pack batteries.

[0036] In one embodiment, an exhaust channel and an exhaust hole are formed on the cavity wall of the accommodating cavity. The exhaust channel is connected to the accommodating cavity through the exhaust hole. The exhaust hole is located on the side of the cavity wall of the accommodating cavity facing the accommodating cavity.

[0037] In the above technical solution, after a thermal runaway occurs in a soft-pack battery cell, the eruption material is discharged from the pressure relief port to the accommodating cavity, and then enters the exhaust flow channel through the exhaust hole for discharge, so as to extend the flow path of the gas, thereby preventing the eruption material from forming a flame at the end of the exhaust channel away from the exhaust hole due to excessively high temperature and too short exhaust distance, thereby achieving high safety.

[0038] In one embodiment, the first soft-pack battery and the second soft-pack battery are arranged along the top-to-bottom direction, and the exhaust holes are located on the cavity walls on opposite sides of the accommodating cavity along the top-to-bottom direction.

[0039] In the above technical solution, after thermal runaway occurs, the first soft-pack battery and the second soft-pack battery both have corresponding exhaust holes to discharge into the exhaust flow channel, which is safer.

[0040] In one embodiment, the battery pack further includes an explosion-proof valve, and the explosion-proof valve is arranged on one side or both sides of the box body along the second direction, and the first direction, the second direction and the top and bottom directions are arranged crosswise with each other.

[0041] In the above technical solution, after the soft pack battery cell experiences thermal runaway, the eruption material is discharged from the pressure relief port to the containment chamber, and then enters the exhaust flow channel through the exhaust hole. When the air pressure in the containment chamber reaches the bursting pressure of the explosion-proof valve, the explosion-proof valve will open the pressure relief port to relieve the pressure in the containment chamber to avoid explosion and ensure the safety of the battery pack. It should be noted that the bursting pressure refers to the maximum value of the explosion pressure that the explosion-proof valve can withstand when it is closed. BRIEF DESCRIPTION OF THE DRAWINGS

[0042] Figure 1 A schematic diagram of the structure of a soft-pack battery provided in an embodiment of the present application, wherein the top cover is not provided at the mounting opening, and the soft-pack battery cell and the bottom cover are not shown;

[0043] Figure 2 for Figure 1 A schematic diagram of the structure of the shell in FIG.

[0044] Figure 3 for Figure 1 A schematic diagram of the structure of the middle top cover;

[0045] Figure 4 A schematic diagram of the structure of a battery pack provided in another embodiment of the present application.

[0046] Description of Reference Numerals

[0047] Battery pack 1000; soft-pack battery 100; first soft-pack battery 100a; second soft-pack battery 100b; top cover 1; conductive terminal 1a; second mounting hole 1b; pressure relief port 1c; connection area 1d; pressure relief area 1e; cover body 11; abutment plate 12; shell 2; placement cavity 2a; mounting port 2b; first mounting hole 2c; folded edge 2d; connecting port 2e; first side plate 21; second side plate 22; third side plate 23; shielding member 3; bottom cover 4; box body 200; accommodating cavity 200a; insulating layer 300. DETAILED DESCRIPTION

[0048] The following embodiments of the technical solution of the present application will be described in detail in conjunction with the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present application, and are therefore only used as examples, and cannot be used to limit the scope of protection of the present application.

[0049] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by technicians in the technical field to which this application belongs; the terms used herein are only for the purpose of describing specific embodiments and are not intended to limit this application; the terms "including" and "having" in the specification and claims of this application and the above-mentioned figure descriptions and any variations thereof are intended to cover non-exclusive inclusions.

[0050] In the description of the embodiments of the present application, the technical terms "first", "second", "third", etc. are only used to distinguish different objects, and cannot be understood as indicating or implying relative importance or implicitly indicating the number, specific order or primary and secondary relationship of the indicated technical features. In the description of the embodiments of the present application, the meaning of "multiple" is more than two, unless otherwise clearly and specifically defined.

[0051] Reference to "embodiments" herein means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present application. The appearance of the phrase in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0052] In the description of the embodiments of the present application, unless otherwise clearly specified and limited, technical terms such as "installation", "connection", "fixation" and the like should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, and it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the embodiments of the present application can be understood according to the specific circumstances.

[0053] In the description of the embodiments of the present application, unless otherwise clearly specified and limited, the technical term "contact" should be understood in a broad sense, and may be direct contact or contact through an intermediate medium layer. It may be contact with essentially no interaction force between the two contacting parties, or it may be contact with interaction force between the two contacting parties.

[0054] At present, new energy batteries are increasingly used in life and industry. New energy batteries are not only used in energy storage power systems such as hydropower, thermal power, wind power and solar power stations, but are also widely used in electric vehicles such as electric bicycles, electric motorcycles and electric cars. With the continuous expansion of the application field of power batteries, the market demand is also constantly expanding.

[0055] As part of the creative concept of the present application, before describing the embodiments of the present application, it is necessary to analyze the reasons for the high manufacturing cost of soft-pack batteries in the related art, and obtain the technical solution of the embodiments of the present application through reasonable analysis.

[0056] In the related art, the soft-pack battery cell is located in the placement cavity of the shell, and the top cover is arranged at the installation port connected to the placement cavity. The top cover is provided with a conductive terminal for electrically connecting with the pole ear of the soft-pack battery cell. In order to reduce the risk of leakage, the material of the top cover needs to be set to an insulating material. As a result, when connecting the shell and the top cover, a metal welding plate needs to be installed on the top cover, which undoubtedly increases the manufacturing cost of the soft-pack battery.

[0057] If fasteners are used to connect the shell and the top cover, compared with welding, there is no need to set up a metal welding plate. This not only reduces the manufacturing cost of the soft-pack battery, but also makes the connection process simpler and the production efficiency high.

[0058] The solution of the embodiment of the present application can be applied to, but not limited to, a soft-pack battery 100, a battery pack 1000 including a plurality of soft-pack batteries 100, and can also be applied to a hard-pack battery and a battery pack 1000 including a plurality of hard-pack batteries. The top cover 1 is provided on the mounting opening 2b, and then a fastener is passed through the housing 2 and the top cover 1 to connect the housing 2 and the top cover 1. In this way, not only can the connection process be simplified, but also the manufacturing cost of the soft-pack battery 100 can be reduced.

[0059] A soft-pack battery cell refers to a basic unit whose outer shell is made of flexible material and can realize the mutual conversion of chemical energy and electrical energy.

[0060] In the embodiment of the present application, the soft-pack battery cell may be a secondary battery. A secondary battery refers to a battery cell that can be continuously used by activating active materials by charging after the battery cell is discharged.

[0061] In the embodiment of the present application, the soft-pack battery cell can be a lithium-ion battery, a sodium-ion battery, a sodium-lithium-ion battery, a lithium metal battery, a sodium metal battery, a lithium-sulfur battery, a magnesium-ion battery, a nickel-hydrogen battery, a nickel-cadmium battery, a lead-acid battery, etc., but the embodiment of the present application is not limited to this.

[0062] The soft pack battery 100 of the present application embodiment, please refer to Figures 1 to 3 The soft-pack battery 100 includes a soft-pack battery cell, a top cover 1, a shell 2, and a fastener. The tab of the soft-pack battery cell is electrically connected to the conductive terminal 1a of the top cover 1. The shell 2 is formed with a placement cavity 2a and a mounting port 2b connected to the placement cavity 2a. The soft-pack battery cell is arranged in the placement cavity 2a, and the top cover 1 is covered in the mounting port 2b. The fastener is penetrated through the shell 2 and the top cover 1 to connect the shell 2 and the top cover 1.

[0063] The housing 2 is used to accommodate the soft-pack battery monomer, thereby providing a certain degree of protection for the soft-pack battery monomer and reducing the risk of the soft-pack battery monomer being exposed to the outside and being damaged.

[0064] The placement cavity 2a refers to the accommodation space inside the shell 2, which is used to accommodate the soft-pack battery monomer.

[0065] A fastener is an element or part that connects two or more parts together and prevents them from separating.

[0066] The top cover 1 is a structure for blocking the installation opening 2b. When the soft-pack battery cell is placed in the placement cavity 2a, the top cover 1 is arranged on the installation opening 2b to block the installation opening 2b, thereby preventing the soft-pack battery cell from escaping from the housing 2 from the installation opening 2b as much as possible.

[0067] The conductive terminal 1a refers to a part used to connect to the tab to lead the positive and negative electrodes of the soft-pack battery cell out of the shell 2 for subsequent connection. For example, the conductive terminal 1a can be a tab.

[0068] The soft-pack battery 100 provided in the present application forms a placement cavity 2a in the shell 2, and the soft-pack battery monomer is placed in the placement cavity 2a. On the one hand, the soft-pack battery monomer can be protected to a certain extent and the service life of the soft-pack battery monomer can be improved; on the other hand, the connection method of the soft pack can be changed to the connection method of the square shell to simplify the subsequent assembly of the battery pack 1000, which is more convenient to operate. The pole ear of the soft-pack battery 100 is electrically connected to the conductive terminal 1a of the top cover 1, and the top cover 1 is covered on the installation port 2b. The fastener is penetrated through the shell 2 and the top cover 1 to connect the shell 2 with the top cover 1. In this way, the shell 2 and the top cover 1 are connected by fasteners. Compared with the welding method, the embodiment of the present application does not need to set a metal welding plate. In this way, not only can the manufacturing cost of the soft-pack battery 100 be reduced, but the connection method using fasteners is also relatively simple and has high production efficiency.

[0069] Exemplarily, in one embodiment, the number of soft-pack battery cells is not limited. For example, the number of soft-pack battery cells may be four, and four soft-pack battery cells are placed in one placement cavity 2 a to improve the energy density of the soft-pack battery 100 .

[0070] In one embodiment, please refer to Figure 1 The shell 2 is formed with a first mounting hole 2c, the top cover 1 is formed with a second mounting hole 1b, and the fastener is passed through the first mounting hole 2c and the second mounting hole 1b to connect the top cover 1 and the shell 2.

[0071] Exemplarily, the shell 2 has first mounting holes 2c formed on the sides along the first direction and the second direction, and the top cover 1 has second mounting holes 1b formed on the sides along the first direction and the second direction, and the fasteners pass through the first mounting holes 2c and the second mounting holes 1b in sequence, and then connect the top cover 1 and the shell 2.

[0072] It should be noted that the first direction is perpendicular to the top and bottom directions. For example, the first direction may be the length direction, the second direction may be the width direction, the top direction refers to the direction toward the top cover 1, and the bottom direction is opposite to the top direction. The top and bottom directions, the width direction, and the length direction are perpendicular to each other and together constitute a three-dimensional vertical coordinate system.

[0073] It should be noted that Figure 1 R1 may be the top and bottom direction, R2 may be the length direction, and R3 may be the width direction.

[0074] In this way, the shell 2 and the top cover 1 are connected by passing the fastener through the first mounting hole 2c and the second mounting hole 1b. On the one hand, the structure is simple, the operation is convenient, and no complicated process or tools are required; on the other hand, the cooperation between the fastener and the first mounting hole 2c and the second mounting hole 1b can increase the stronger pulling force or pressure, thereby ensuring the connection strength and stability; on the other hand, the cooperation method of the fastener and the first mounting hole 2c and the second mounting hole 1b can be applicable to shells 2 and top covers 1 of different materials and different thicknesses, and has strong versatility.

[0075] In one embodiment, the fastener is a rivet, and the rivet connects the top cover 1 and the shell 2 by riveting.

[0076] In this way, by inserting the rivet into the first mounting hole 2c and the second mounting hole 1b, the rivet can then be pressed between the shell 2 and the top cover 1 through a riveting device to achieve a fixed connection with high connection strength, which can effectively ensure the stability between the shell 2 and the top cover 1; on the other hand, the rivet riveting connection method has good seismic and impact resistance, and can resist external vibrations and impacts to maintain the stability of the connection; on another hand, compared with welding and other methods, the rivet riveting connection method is simple and quick to operate, the connection can be completed quickly, and the installation efficiency is high.

[0077] Exemplarily, in one embodiment, the first mounting hole 2c and the second mounting hole 1b may be round holes or other special-shaped holes, specifically based on the shape that can adapt to the fastener, so that the airtightness of the placement cavity 2a can be improved.

[0078] In one embodiment, please refer to Figure 1The number of the first mounting hole 2c, the second mounting hole 1b and the fasteners are all at least two, at least two first mounting holes 2c are arranged in the shell 2 along the circumferential direction, at least two second mounting holes 1b are correspondingly arranged in the top cover 1, and each fastener is passed through the corresponding first mounting hole 2c and the corresponding second mounting hole 1b.

[0079] Exemplarily, the number of second mounting holes 1b can be sixteen, of which twelve second mounting holes 1b can be respectively arranged six on the two end surfaces of the top cover 1 along the width direction, and the other four second mounting holes 1b can be respectively arranged two on the two end surfaces of the top cover 1 along the length direction. The number of first mounting holes 2c and fasteners can also be sixteen, and the sixteen first mounting holes 2c are arranged at corresponding positions of the shell 2, and each fastener is passed through the corresponding first mounting hole 2c and the corresponding second mounting hole 1b.

[0080] In this way, by arranging a plurality of first mounting holes 2c at circumferential intervals on the shell 2, and correspondingly arranging a plurality of second mounting holes 1b on the circumference of the top cover 1, each fastener is passed through the corresponding first mounting hole 2c and the corresponding second mounting hole 1b. On the one hand, the connection strength between the shell 2 and the top cover 1 can be further improved, and the loosening or damage of the connection caused by vibration can be reduced; on the other hand, by adopting multiple fasteners to connect along the circumference, the gap at the connection between the shell 2 and the top cover 1 can be reduced, and the airtightness of the placement cavity 2a can be improved.

[0081] In one embodiment, the second mounting hole 1b is a waist-shaped hole. Thus, by setting the second mounting hole 1b as a waist-shaped hole, on the one hand, it is easy to align the first mounting hole 2c with the second mounting hole 1b, reducing the difficulty of assembling the fastener and improving the installation efficiency; on the other hand, by setting the second mounting hole 1b as a waist-shaped hole, compared with setting the first mounting hole 2c as a waist-shaped hole, it is possible to avoid the situation where the air tightness of the placement cavity 2a is reduced.

[0082] In one embodiment, please refer to Figure 1 The top cover 1 includes a cover body 11 and an abutment plate 12. The abutment plate 12 is connected to the top surface of the cover body 11. The projection area of ​​the cover body 11 along the top-to-bottom direction is located within the projection area of ​​the abutment plate 12. A second mounting hole 1b is formed on the cover body 11 near the abutment plate 12. When the first mounting hole 2c is aligned with the second mounting hole 1b, the cover body 11 is located in the placement cavity 2a, and the top surface of the shell 2 abuts against the bottom surface of the abutment plate 12.

[0083] Exemplarily, the projection area of ​​the cover body 11 along the top-bottom direction is located within the projection area of ​​the abutment plate 12, which means that the abutment plate 12 protrudes outwardly from the cover body 11 along the circumferential direction so that a step is formed between the two. The conductive terminal 1a is arranged on the bottom surface of the cover body 11. The second mounting hole 1b is arranged on the cover body 11 near the abutment plate 12 along the top-bottom direction.

[0084] In this way, on the one hand, during installation, by abutting the top surface of the shell 2 against the bottom surface of the abutment plate 12, the positioning between the shell 2 and the top cover 1 can be quickly completed, which facilitates the alignment of the first mounting hole 2c and the second mounting hole 1b, and the assembly is more convenient; on the other hand, by abutting the top surface of the shell 2 against the bottom surface of the abutment plate 12, the abutment plate 12 can block the gap between the cover body 11 and the shell 2 to a certain extent, thereby improving the airtightness of the placement cavity 2a.

[0085] Exemplarily, in one embodiment, the shape of the abutment plate 12 is not limited, for example, it can be rectangular, square or other special shapes.

[0086] In the related art, when installing a soft-pack battery cell, the soft-pack battery cell is directly inserted into a shell having a placement cavity from a mounting port. During the insertion process, the cavity wall of the placement cavity will scratch the surface of the soft-pack battery cell, which can easily cause damage to the soft-pack battery cell.

[0087] In one embodiment, please refer to Figure 1 and Figure 2 The shell 2 includes a first side plate 21, a second side plate 22 and a third side plate 23. The first side plate 21 and the second side plate 22 are connected to both ends of the third side plate 23 along its width direction; the first side plate 21 and the second side plate 22 are both formed with folded edges 2d at one end away from the third side plate 23, and the two folded edges 2d overlap each other to jointly define a placement cavity 2a.

[0088] Exemplarily, the shapes of the first side plate 21, the second side plate 22 and the third side plate 23 are not limited, for example, they can all be rectangular. The first side plate 21 and the second side plate 22 are connected to both ends of the third side plate 23 in the width direction, so that the housing 2 is roughly U-shaped. The first side plate 21 and the second side plate 22 are both formed with a folded edge 2d at one end away from the third side plate 23, and the two folded edges 2d can overlap each other, that is, one folded edge 2d can overlap the other folded edge 2d, so that they can jointly enclose and define the placement cavity 2a.

[0089] In this way, during assembly, since the shell 2 is U-shaped before installation, the soft-pack battery cell connected with the top cover 1 can be placed into the shell 2 from the opening of the U-shaped shell 2, and then the top surface of the shell 2 is abutted against the bottom surface of the abutment plate 12, and the position is adjusted to align the first mounting hole 2c with the second mounting hole 1b. After alignment, the folded edges 2d of the first side plate 21 and the second side plate 22 are overlapped facing each other, and finally the fasteners are inserted through the first mounting hole 2c and the second mounting hole 1b to connect the shell 2 with the top shell. In this way, compared with the related art of directly inserting the soft-pack battery cell into the shell with the placement cavity, the embodiment of the present application adopts the method of enclosing and wrapping, which can not only reduce the damage of the shell 2 to the soft-pack battery cell, and improve the service life of the soft-pack battery cell, but also make the assembly simpler.

[0090] Exemplarily, in one embodiment, the first side plate 21 , the second side plate 22 and the third side plate 23 may be connected by welding.

[0091] Exemplarily, in one embodiment, the first side panel 21, the second side panel 22 and the third side panel 23 can be integrally formed panels, which are then bent by stamping or the like to form the first side panel 21, the second side panel 22 and the third side panel 23, with high connection strength.

[0092] In one embodiment, the two folded edges 2d are connected by welding. Thus, by connecting the two folded edges 2d by welding, the connection strength between the two folded edges 2d can be improved, the occurrence of cracks that lead to a decrease in the airtightness of the placement cavity 2a can be reduced, and the working stability is good.

[0093] Exemplarily, in one embodiment, the two folded edges 2d may also be screwed or glued.

[0094] In one embodiment, please refer to Figures 1 to 3 The shell 2 is formed with a connecting port 2e connected to the placement cavity 2a, the installation port 2b and the connecting port 2e are arranged along the top-to-bottom direction, the soft-pack battery 100 includes a bottom cover 4 and a shielding member 3, the bottom cover 4 is covered at the connecting port 2e, the top cover 1 is formed with a pressure relief port 1c running through the top-to-bottom direction, the shielding member 3 is arranged at the pressure relief port 1c, and the pressure bearing capacity of the shell 2 and the pressure bearing capacity of the bottom cover 4 are both greater than the pressure bearing capacity of the shielding member 3.

[0095] For example, see Figure 1 and Figure 3 The top cover 1 is divided into a connection area 1d and a pressure relief area 1e along the length direction. The connection area 1d is provided with a conductive terminal 1a, and the pressure relief area 1e is formed with a pressure relief port 1c. The pressure relief port 1c runs through the two sides of the top cover 1 along the top and bottom directions. After the top cover 1 is connected to the housing 2, the placement cavity 2a can be connected to the pressure relief port 1c. The bottom cover 4 is covered at the communication port 2e, and the shielding member 3 is provided at the pressure relief port 1c.

[0096] In this way, by setting a bottom cover 4 at the bottom connecting port 2e and setting a shielding member 3 at the top pressure relief port 1c, impurities and hot erupting gases can be prevented from entering the placement cavity 2a and being transmitted to the soft-pack battery monomer, so as to avoid serious thermal runaway problems in the soft-pack battery 100. By setting the pressure bearing capacity of the shielding member 3 to be less than the pressure bearing capacity of the shell 2 and less than the pressure bearing capacity of the bottom cover 4, when the soft-pack battery monomer undergoes thermal runaway, the erupting gas can first rupture the shielding member 3 to eject the gas from the pressure relief port 1c in a directional manner, so as to avoid explosion or rupture of the soft-pack battery 100. By setting the pressure relief port 1c and the conductive terminal 1a on the top cover 1, it is convenient to monitor and inspect the conductive terminal 1a while monitoring and inspecting the pressure relief port 1c.

[0097] It should be noted that the pressure bearing capacity can be determined by filling the placement cavity 2a with gas of preset pressure, and then determining which of the shell 2, the bottom cover 4 and the shielding member 3 breaks first, which indicates that its pressure bearing capacity is the lowest.

[0098] Exemplarily, in one embodiment, the shape of the pressure relief port 1c is not limited, for example, it can be rectangular, square, or circular, etc.

[0099] Exemplarily, in one embodiment, the number of pressure relief ports 1c is not limited. For example, the number of pressure relief ports 1c may be twelve. In this way, after thermal runaway occurs, the gas can be quickly released from the placement cavity 2a, which is highly safe.

[0100] For example, in one embodiment, please refer to Figure 2 , the two end surfaces of the pressure relief zone 1e along the width direction are provided with five second mounting holes 1b, and the two end surfaces of the connection zone 1d along the width direction and on the side away from the pressure relief zone 1e are provided with a second mounting hole 1b. The end surface of the pressure relief zone 1e along the length direction away from the connection zone 1d is provided with two second mounting holes 1b, and the end surface of the connection zone 1d along the length direction away from the pressure relief zone 1e is provided with two second mounting holes 1b. In this way, by providing a small number of second mounting holes 1b in the connection zone 1d, leakage problems can be avoided after the fastener passes through the second mounting holes 1b and contacts and connects with the conductive terminal 1a.

[0101] Exemplarily, in one embodiment, the portion of the connection area 1d and the top cover 1 that is not connected by fasteners may be glued to improve the airtightness of the placement cavity 2a.

[0102] In one embodiment, the shielding member 3 and the bottom cover 4 are both made of mica, the pressure bearing capacity of the mica of the shielding member 3 is smaller than that of the mica of the bottom cover 4, and the shell 2 is made of metal or plastic.

[0103] Exemplarily, by setting the material of the shielding member 3 and the bottom cover 4 to mica, the material of the shell 2 to metal or plastic, and the pressure-bearing capacity of the mica of the shielding member 3 is less than the pressure-bearing capacity of the mica of the bottom cover 4, in this way, when thermal runaway occurs in the soft-pack battery cell, the gas can break through the shielding member 3 with lower pressure-bearing capacity and be ejected from the pressure relief port 1c, so as to achieve directional eruption of the soft-pack battery 100.

[0104] For example, in one embodiment, the pressure bearing capacity of the mica of the shielding member 3 is less than that of the mica of the bottom cover 4. The thickness can be considered. For example, the thickness of the mica of the shielding member 3 can be set to be thinner, and the thickness of the mica of the bottom cover 4 can be set to be thicker. For example, notches can be set on the mica of the shielding member 3 to reduce its thickness. In this way, after the thermal runaway of the soft-pack battery cell occurs, it can be directed to the pressure relief port 1c for spraying.

[0105] Another aspect of the present application embodiment provides a battery pack 1000, see Figure 4 The battery pack 1000 includes a box body 200 and a soft-pack battery 100 in any one of the above embodiments. A receiving cavity 200 a is formed in the box body 200 , and the soft-pack battery 100 is located in the receiving cavity 200 a of the box body 200 .

[0106] Exemplarily, the box body 200 includes a receiving cavity 200a and a take-out port communicating with the receiving cavity 200a, and the soft-pack battery 100 can be placed in the receiving cavity 200a through the take-out port. The number of soft-pack batteries 100 can be multiple, and multiple soft-pack batteries 100 can be connected in series, in parallel, or in mixed series to form a whole, and then the whole is placed in the receiving cavity 200a. The battery pack 1000 may also include other structures. For example, the battery pack 1000 may also include a reflux component for realizing electrical connection between multiple soft-pack batteries 100.

[0107] Hybrid connection refers to multiple soft-pack batteries 100 being connected in both series and parallel.

[0108] The battery pack 1000 provided in the embodiment of the present application uses fasteners to connect the shell 2 and the top cover 1 to form a soft-pack battery 100, and then the soft-pack battery 100 is placed in the box 200. In this way, not only the manufacturing cost of the battery pack 1000 can be reduced, but also the assembly is relatively simple and the production efficiency is high.

[0109] In one embodiment, please refer to Figures 1 to 3 The shell 2 is formed with a connecting port 2e connected to the placement cavity 2a, the installation port 2b and the connecting port 2e are arranged along the top-to-bottom direction, the soft-pack battery 100 includes a bottom cover 4, the bottom cover 4 is covered on the connecting port 2e, and the top cover 1 is formed with a pressure relief port 1c running through the top-to-bottom direction.

[0110] By providing a pressure relief port 1c on the top cover 1, the pressure relief port 1c is connected to the placement cavity 2a. When a soft-pack battery cell undergoes thermal runaway, high-temperature ejecta (hot ejecta gas) can be directedly ejected from the pressure relief port 1c, thereby preventing the soft-pack battery 100 from exploding or rupturing, and preventing the high temperature of the ejecta from being transmitted to other soft-pack batteries 100 in the battery pack 1000, thereby achieving high safety. The pressure relief port 1c and the conductive terminal 1a are provided on the top cover 1, so that the conductive terminal 1a can be monitored and inspected while the pressure relief port 1c can be monitored and inspected.

[0111] In one embodiment, please refer to Figure 4 The number of soft-pack batteries 100 is at least two, at least one of which is a first soft-pack battery 100a, and at least one of which is a second soft-pack battery 100b, and a side of the first soft-pack battery 100a having a conductive terminal 1a is arranged away from a side of the second soft-pack battery 100b having a conductive terminal 1a.

[0112] The side of the first soft-pack battery 100a having the conductive terminal 1a and the side of the second soft-pack battery 100b having the conductive terminal 1a are arranged away from each other, which means that the first soft-pack battery 100a and the second soft-pack battery 100b are spaced apart and extended along the top-bottom direction, the side of the first soft-pack battery 100a away from the second soft-pack battery 100b along the top-bottom direction has the conductive terminal 1a, and the side of the second soft-pack battery 100b away from the first soft-pack battery 100a along the top-bottom direction has the conductive terminal 1a.

[0113] In this way, the side of the first soft-pack battery 100a having the conductive terminal 1a and the side of the second soft-pack battery 100b having the conductive terminal 1a are arranged to be separated from each other, so that the high voltage accumulation at the conductive terminal 1a can be reduced while achieving directional eruption, so as to avoid the risk of thermal runaway, short circuit or even explosion caused by the high voltage accumulation of the first soft-pack battery 100a and the second soft-pack battery 100b, and the safety is high.

[0114] In one embodiment, please refer to Figure 4 , the first soft-pack battery 100a and the second soft-pack battery 100b are arranged along the top-to-bottom direction, the number of the first soft-pack battery 100a and the second soft-pack battery 100b are both multiple, the multiple first soft-pack batteries 100a are arranged at intervals along the first direction, and the multiple second soft-pack batteries 100b are arranged at intervals along the first direction, wherein the top-to-bottom direction is arranged crosswise with the first direction.

[0115] Exemplarily, the number of soft-pack batteries 100 can be twenty, ten of the twenty soft-pack batteries 100 are first soft-pack batteries 100a, and the other ten of the twenty soft-pack batteries 100 are second soft-pack batteries 100b, the ten first soft-pack batteries 100a are arranged at intervals along the first direction, and the ten second soft-pack batteries 100b are arranged at intervals along the first direction, and the first soft-pack batteries 100a and the second soft-pack batteries 100b are arranged at intervals along the top-bottom direction, wherein the top-bottom direction may be perpendicular to the first direction.

[0116] In this way, by means of the cross arrangement, the impact on other soft-pack batteries 100 can be reduced after thermal runaway occurs in the soft-pack battery 100 in the battery pack 1000 .

[0117] In one embodiment, please refer to Figure 4 The battery pack 1000 further includes an insulating layer 300 , and the space between each first soft-pack battery 100 a and the corresponding second soft-pack battery 100 b is filled with the insulating layer 300 , and the insulating layer 300 covers the first soft-pack battery 100 a and the second soft-pack battery 100 b , respectively.

[0118] The insulating layer 300 is used to isolate the first soft-pack battery 100 a and the second soft-pack battery 100 b to prevent current from being transferred between the first soft-pack battery 100 a and the second soft-pack battery 100 b .

[0119] Exemplarily, the insulating layer 300 may be disposed between a side of the first pouch cell 100 a away from the conductive terminal 1 a thereof and a side of the second pouch cell 100 b away from the conductive terminal 1 a thereof.

[0120] In this way, by providing an insulating layer 300 between the side of the first soft-pack battery 100a away from its conductive terminal 1a and the side of the second soft-pack battery 100b away from its conductive terminal 1a, on the one hand, the first soft-pack battery 100a and the second soft-pack battery 100b are insulated to reduce the possibility of short circuit between the two; on the other hand, taking the first soft-pack battery 100a as an example, when thermal runaway occurs in the soft-pack battery monomer, since the pressure relief port 1c is located on the side of the first soft-pack battery 100a away from the insulating layer 300, when the ejecta is ejected from the pressure relief port 1c, a force is applied to the first soft-pack battery 100a to move toward the second soft-pack battery 100b, and the insulating layer 300 can be provided to block and support it to avoid affecting other soft-pack batteries 100.

[0121] Exemplarily, in one embodiment, the material of the insulating layer 300 is insulating glue, which is in liquid state before filling. The liquid insulating glue can be solidified between the first soft-pack battery 100a and the second soft-pack battery 100b, with simple operation and good sealing. Since the shell 2 is closed on one side away from the pressure relief port 1c, it is difficult for the liquid insulating glue to enter the placement cavity 2a.

[0122] In one embodiment, the cavity wall of the accommodating cavity 200a is formed with an exhaust channel and an exhaust hole, the exhaust channel is connected with the accommodating cavity 200a through the exhaust hole, and the exhaust hole is located on the side of the cavity wall of the accommodating cavity 200a facing the accommodating cavity 200a.

[0123] The exhaust flow channel refers to a channel for exhausting gas, and its flow cross section can be a regular quadrilateral or a circle, etc. The flow cross section refers to the cross section taken perpendicular to the streamline cluster of the fluid.

[0124] The exhaust hole refers to a hole used to connect the accommodating cavity 200a with the exhaust flow channel, and its shape can be circular or square.

[0125] Exemplarily, the exhaust hole and the exhaust flow channel may be disposed on the cavity wall of the accommodating cavity 200a close to the pressure relief port 1c along the top and bottom directions.

[0126] In this way, after the soft-pack battery cell undergoes thermal runaway, the eruption material is discharged from the pressure relief port 1c to the accommodating chamber 200a, and then enters the exhaust flow channel through the exhaust hole to be discharged, so as to extend the flow path of the gas and avoid the eruption material from forming a flame at the end of the exhaust channel away from the exhaust hole due to excessive temperature and too short exhaust distance, thereby achieving high safety.

[0127] In one embodiment, the first soft-pack battery 100a and the second soft-pack battery 100b are arranged along the top-to-bottom direction, and the exhaust holes are located on the cavity walls on opposite sides of the accommodating cavity 200a along the top-to-bottom direction.

[0128] That is to say, exhaust holes are provided on the cavity walls on opposite sides of the top and bottom directions of the accommodating cavity 200a. In this way, after thermal runaway occurs, the first soft-pack battery 100a and the second soft-pack battery 100b have corresponding exhaust holes to discharge into the exhaust flow channel, which is safer.

[0129] In one embodiment, the battery pack 1000 further includes an explosion-proof valve, and the explosion-proof valve is disposed on one side or both sides of the box body 200 along the first direction, and the first direction, the second direction, and the top and bottom directions are disposed crosswise with each other.

[0130] Exemplarily, a pressure relief port 1c connected to the exhaust flow channel is formed on one or both sides of the box body 200 along the first direction, and the explosion-proof valve is arranged at the pressure relief port 1c. The first direction, the second direction and the top and bottom directions are arranged to intersect each other, and the top and bottom directions, the first direction and the second direction are perpendicular to each other.

[0131] In this way, after the soft-pack battery cell undergoes thermal runaway, the ejected material is discharged from the pressure relief port 1c to the accommodating chamber 200a, and then enters the exhaust flow channel through the exhaust hole. When the air pressure in the accommodating chamber 200a reaches the bursting pressure of the explosion-proof valve, the explosion-proof valve will open the pressure relief port 1c to relieve the pressure in the accommodating chamber 200a, avoid explosion, and ensure the safe operation of the battery pack 1000. It should be noted that the bursting pressure refers to the maximum value of the explosion pressure that the explosion-proof valve can withstand when it is closed.

[0132] The soft-pack battery 100 provided in the embodiment of the present application comprises a soft-pack battery cell, a top cover 1, a shell 2 and a fastener. The shell 2 is formed with a placement cavity 2a and a mounting port 2b communicating with the placement cavity 2a. The soft-pack battery cell is arranged in the placement cavity 2a. The top cover 1 is arranged on the mounting port 2b. The shell 2 is formed with a first mounting hole 2c. The top cover 1 is formed with a second mounting hole 1b. The second mounting hole 1b is a waist-shaped hole. The fastener is a rivet. The rivet is penetrated through the first mounting hole 2c and the second mounting hole 1b to connect the top cover 1 and the shell 2 by riveting. The number of the first mounting hole 2c, the second mounting hole 1b and the fastener are all multiple. The multiple first mounting holes 2c are arranged in the shell 2 at intervals along the circumferential direction. The multiple second mounting holes 1b are correspondingly arranged on the top cover 1. Each fastener is correspondingly penetrated through the first mounting hole 2c and the second mounting hole 1b. The top cover 1 includes a cover body 11 and an abutment plate 12. The abutment plate 12 is connected to the top surface of the cover body 11. The projection area of ​​the cover body 11 along the top-bottom direction is located within the projection area of ​​the abutment plate 12. A second mounting hole 1b is formed on the cover body 11 near the abutment plate 12. When the first mounting hole 2c is aligned with the second mounting hole 1b, the cover body 11 is located in the placement cavity 2a, and the top surface of the shell 2 abuts against the bottom surface of the abutment plate 12. The shell 2 includes a first side plate 21, a second side plate 22 and a third side plate 23. The first side plate 21 and the second side plate 22 are connected to both ends of the third side plate 23 along the width direction thereof; the first side plate 21 and the second side plate 22 are both formed with a folded edge 2d at one end away from the third side plate 23. The two folded edges 2d overlap each other and are connected by welding to jointly define the placement cavity 2a. The shell 2 is formed with a communication port 2e communicating with the placement cavity 2a, the installation port 2b and the communication port 2e are arranged along the top-bottom direction, the soft-pack battery 100 includes a bottom cover 4, the bottom cover 4 is covered on the communication port 2e, the top cover 1 is formed with a pressure relief port 1c running through the top-bottom direction, the soft-pack battery 100 includes a shielding member 3, the shielding member 3 is arranged at the pressure relief port 1c, the pressure bearing capacity of the shell 2 and the pressure bearing capacity of the bottom cover 4 are both greater than the pressure bearing capacity of the shielding member 3. The shielding member 3 and the bottom cover 4 are both made of mica, the pressure bearing capacity of the mica of the shielding member 3 is less than the pressure bearing capacity of the mica of the bottom cover 4, and the shell 2 is made of metal or plastic.

[0133] The above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them; although the present application is described in detail with reference to the above embodiments, a person skilled in the art should understand that the technical solutions described in the above embodiments can still be modified, or some or all of the technical features can be replaced by equivalents; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application, and they should all be included in the scope of the specification of the present application. In particular, as long as there is no structural conflict, the various technical features mentioned in the various embodiments can be combined in any way.

Claims

1. A soft pack battery, characterized in that: include: Soft pack battery cells; A top cover, wherein the tabs of the soft-pack battery cell are electrically connected to the conductive terminals of the top cover; The housing is formed with a placement cavity and a mounting opening communicated with the placement cavity, the soft-pack battery monomer is arranged in the placement cavity, and the top cover is arranged at the mounting opening; A fastener is provided through the shell and the top cover to connect the shell and the top cover.

2. The soft pack battery according to claim 1, characterized in that: The shell is formed with a first mounting hole, the top cover is formed with a second mounting hole, and the fastener is passed through the first mounting hole and the second mounting hole to connect the top cover and the shell.

3. The soft pack battery according to claim 2, characterized in that: The number of the first mounting holes, the second mounting holes and the fasteners is at least two, at least two of the first mounting holes are circumferentially spaced apart in the shell, at least two of the second mounting holes are correspondingly arranged in the top cover, and each of the fasteners is passed through the corresponding first mounting hole and the corresponding second mounting hole.

4. The soft pack battery according to claim 2, characterized in that: The fastener is a rivet, and the rivet connects the top cover and the shell by riveting.

5. The soft pack battery according to claim 2, characterized in that: The second mounting hole is a waist-shaped hole.

6. The soft pack battery according to claim 2, characterized in that: The top cover includes a cover body and an abutment plate, wherein the abutment plate is connected to the top surface of the cover body, the projection area of ​​the cover body along the top-to-bottom direction is located within the projection area of ​​the abutment plate, the cover body is formed with the second mounting hole near the abutment plate, and when the first mounting hole is aligned with the second mounting hole, the cover body is located in the placement cavity, and the top surface of the shell abuts against the bottom surface of the abutment plate.

7. The soft pack battery according to claim 1, characterized in that: The shell includes a first side panel, a second side panel and a third side panel, wherein the first side panel and the second side panel are connected to both ends of the third side panel along its width direction; the first side panel and the second side panel are both formed with folded edges at one end away from the third side panel, and the two folded edges overlap each other to jointly define the placement cavity.

8. The soft pack battery according to claim 7, characterized in that: The two folded edges are connected by welding.

9. The soft pack battery according to claim 1, characterized in that: The shell is formed with a connecting port connected to the placement cavity, the installation port and the connecting port are arranged along the top-to-bottom direction, the soft-pack battery includes a bottom cover and a shielding member, the bottom cover is arranged on the connecting port, the top cover is formed with a pressure relief port running through the top-to-bottom direction, the shielding member is arranged at the pressure relief port, and the pressure bearing capacity of the shell and the pressure bearing capacity of the bottom cover are both greater than the pressure bearing capacity of the shielding member.

10. The soft pack battery according to claim 9, characterized in that: The shielding member and the bottom cover are both made of mica, the pressure bearing capacity of the mica of the shielding member is smaller than that of the mica of the bottom cover, and the shell is made of metal or plastic.

11. A battery pack, characterized in that: It comprises a box body and the soft-pack battery according to any one of claims 1 to 8, wherein a receiving cavity is formed in the box body, and the soft-pack battery is located in the receiving cavity.

12. The battery pack according to claim 11, characterized in that: The shell is formed with a communication port connected to the placement cavity, the installation port and the communication port are arranged along the top-to-bottom direction, the soft-pack battery includes a bottom cover, the bottom cover is arranged on the communication port, and the top cover is formed with a pressure relief port running through the top-to-bottom direction.

13. The battery pack according to claim 12, characterized in that: The number of the soft-pack batteries is at least two, at least one of which is a first soft-pack battery, and at least one of which is a second soft-pack battery, and a side of the first soft-pack battery having the conductive terminal is arranged away from a side of the second soft-pack battery having the conductive terminal.

14. The battery pack according to claim 13, characterized in that: The first soft-pack battery and the second soft-pack battery are arranged along the top-to-bottom direction, the number of the first soft-pack battery and the number of the second soft-pack battery are both multiple, the multiple first soft-pack batteries are arranged at intervals along the first direction, and the multiple second soft-pack batteries are arranged at intervals along the first direction, wherein the top-to-bottom direction is arranged crosswise with the first direction.

15. The battery pack according to claim 13, characterized in that: The battery pack further includes an insulating layer, the space between each of the first soft-pack batteries and the corresponding second soft-pack batteries is filled with the insulating layer, and the insulating layer covers the first soft-pack batteries and the second soft-pack batteries respectively.

16. The battery pack according to claim 13, characterized in that: An exhaust channel and an exhaust hole are formed on the cavity wall of the accommodating cavity. The exhaust channel is connected with the accommodating cavity through the exhaust hole. The exhaust hole is located on a side of the cavity wall of the accommodating cavity facing the accommodating cavity.

17. The battery pack according to claim 16, characterized in that: The first soft-pack battery and the second soft-pack battery are arranged along the top-to-bottom direction, and the exhaust holes are located on the cavity walls on opposite sides of the accommodating cavity along the top-to-bottom direction.

18. The battery pack according to claim 17, characterized in that: The battery pack further includes an explosion-proof valve, and the explosion-proof valve is arranged on one side or both sides of the box body along the second direction, wherein the first direction, the second direction and the top and bottom directions are arranged to intersect with each other.

Images