Protective housing and energy storage device

Abstract

The present application provides a protective housing and an energy storage device, which can reduce the use of foam in the energy storage device and avoid heat accumulation on the battery module of the energy storage device, thereby facilitating the extension of the service life of the energy storage device. The protective housing includes a shell, the shell includes a bottom shell, a side shell and a limiter, the side shell is fixedly connected to the bottom shell, and is arranged around the bottom shell, and is enclosed with the bottom shell to form a receiving cavity, the receiving cavity is used to receive the battery module of the energy storage device, the limiter is arranged in the receiving cavity, and is fixedly connected to the side shell, and the surface of the limiter facing away from the side shell is used to limit the battery module.

Description

Technical Field

[0001] The present application relates to the field of energy storage technology, and in particular to a protective housing and an energy storage device. Background Art

[0002] Energy storage devices are energy storage components that provide power to electrical equipment and are one of the important components of electrical equipment. In existing energy storage devices, a large amount of foam is usually used to fill the gap between the battery module and the shell to limit the position of the battery module. However, a large amount of foam will cause the battery module to be wrapped, and the heat generated by the battery module during use cannot be dissipated to the external environment in time, resulting in heat accumulation on the battery module, shortening the service life of the energy storage device. Utility Model Content

[0003] The present application provides a protective housing and an energy storage device, which can reduce the use of foam in the energy storage device and avoid heat accumulation on the battery module of the energy storage device, thereby facilitating extending the service life of the energy storage device.

[0004] In a first aspect, the present application provides a protective housing for use in an energy storage device. The protective housing includes a shell, the shell includes a bottom shell, a side shell, and a limiter, the side shell is fixedly connected to the bottom shell, and is arranged around the bottom shell, and is enclosed with the bottom shell to form a receiving cavity, the receiving cavity is used to receive a battery module of the energy storage device, the limiter is arranged in the receiving cavity, and is fixedly connected to the side shell, and the surface of the limiter away from the side shell is used to limit the battery module.

[0005] In which, the limiting body includes two first limiting parts and two second limiting parts. Along the length direction of the protective shell, the two first limiting parts are spaced apart and arranged opposite to each other, and along the width direction of the protective shell, the two second limiting parts are spaced apart and arranged opposite to each other. The surface of each first limiting part and each second limiting part facing away from the side shell is used to limit the battery module.

[0006] Among them, each of the first limiting parts includes a first sub-limiting part and two second sub-limiting parts. Along the width direction of the protective shell, the first sub-limiting part and the two second sub-limiting parts are spaced apart from each other, and the first sub-limiting part is located between the two second sub-limiting parts. Along the length direction of the protective shell, the first sub-limiting part is used to be spaced apart from and relatively arranged with the battery module, and the surfaces of the two second sub-limiting parts facing away from the side shell are used to limit the battery module.

[0007] Wherein, each of the first limiting parts is further provided with a mounting hole, the opening of the mounting hole is located on the surface of the first limiting part away from the bottom shell, and the mounting hole is used to fix the pressure strip of the energy storage device.

[0008] Among them, the limiting body also includes a guide surface, which is located on the side of the limiting body away from the bottom shell, and the guide surface includes a first side close to the side shell and a second side arranged opposite to the first side. In the direction from the first side to the second side, the distance between the guide surface and the bottom shell gradually decreases.

[0009] Wherein, the shell further comprises a plurality of reinforcing ribs, the plurality of reinforcing ribs are arranged at intervals from each other, and are all fixedly connected between the side shell and the surface of the limiting body facing the side shell.

[0010] The bottom shell is provided with a plurality of recesses, the openings of the plurality of recesses are all located on the surface of the bottom shell away from the side shell, and the plurality of recesses are spaced apart from each other.

[0011] In which, the protective shell also includes a cover body and a switch trigger arm, the cover body is installed on the top side of the shell and covers the accommodating cavity, the cover body is provided with a matching hole, and the matching hole penetrates the cover body along the thickness direction of the cover body; the switch trigger arm is located in the matching hole, and the switch trigger arm includes a fixed end and a movable end arranged opposite to the fixed end, the fixed end is fixedly connected to the hole wall of the matching hole, and the movable end can move relative to the cover body along the thickness direction of the cover body, and the movable end is used to press the switch button of the energy storage device.

[0012] Wherein, the cover body includes a peripheral side surface, a top surface and a connecting surface, the peripheral side surface is arranged around the top surface, along the height direction of the protective shell, the top surface is located on the side of the peripheral side surface away from the shell, and the connecting surface is connected between the top surface and the peripheral side surface; the opening of the mating hole is located on the connecting surface.

[0013] In a second aspect, the present application further provides an energy storage device, comprising a battery module and a protective casing as described in any one of the above items, wherein the battery module is installed in the receiving cavity and abuts against the limiting body.

[0014] The protective shell provided in the present application uses a limiting body provided in the shell to limit the battery module so as to achieve fixed installation of the battery module in the shell. There is no need to use a large amount of foam to fill the gap between the shell and the battery module, thereby reducing the amount of foam used in the energy storage device, avoiding the battery module from being wrapped by foam, and preventing heat accumulation on the battery module, which is beneficial to extending the service life of the energy storage device. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the technical solution of the embodiments of the present application, the drawings required for use in the embodiments of the present application will be described below.

[0016] Figure 1 is a schematic diagram of the structure of the energy storage device provided in an embodiment of the present application;

[0017] Figure 2 yes Figure 1 A schematic diagram of the exploded structure of the protective housing in the energy storage device shown;

[0018] Figure 3 yes Figure 2 A schematic diagram of the structure of the shell in the protective housing shown;

[0019] Figure 4 yes Figure 3 A schematic diagram of the structure of the housing shown at another angle;

[0020] Figure 5 yes Figure 3 A schematic diagram of the structure of the housing shown at another angle;

[0021] Figure 6 yes Figure 3 The schematic diagram of the structure of the shell after being cut open along AA;

[0022] Figure 7 yes Figure 2 A schematic diagram of the structure of the cover assembly in the protective housing shown;

[0023] Figure 8 yes Figure 7 A schematic diagram of the structure of the cover body and the switch trigger arm in the cover body assembly shown;

[0024] Fig. 9 yes Figure 8 A schematic diagram of the structure of the cover body and the switch trigger arm at another angle;

[0025] Fig.10 yes Figure 8 The structure diagram of the cover body after being cut open along BB is shown;

[0026] Fig.11 yes Figure 1 A schematic diagram of the cross-sectional structure of the protective casing of the energy storage device shown in FIG. 1 after being cut open along CC. DETAILED DESCRIPTION

[0027] In order to more clearly illustrate the technical solution of the embodiments of the present application, the drawings required for use in the embodiments of the present application will be described below.

[0028] See also Figure 1 , Figure 11 is a schematic diagram of the structure of the energy storage device 100a provided in an embodiment of the present application. For the convenience of description, the length direction of the energy storage device 100a is defined as the X-axis direction, the width direction of the energy storage device 100a is defined as the Y-axis direction, and the height direction of the energy storage device 100a is defined as the Z-axis direction. The X-axis direction, the Y-axis direction, and the Z-axis direction are perpendicular to each other.

[0029] In the embodiment of the present application, the energy storage device 100a may be a device having a power storage function such as a connection harness or a battery system. In the present embodiment, the energy storage device 100a may include a protective housing 100 and a battery module (not shown), and the battery module is installed inside the protective housing 100. The protective housing 100 has a protective and sealing function, which can prevent water vapor and impurities in the external environment from entering the interior of the energy storage device 100a, so as to protect the battery module located inside the protective housing 100, so that the energy storage device 100a can be applied to a variety of working environments.

[0030] The battery module may include multiple batteries, and the multiple batteries may be arranged in series, or the multiple batteries may be arranged in parallel, or some batteries may be arranged in series and some batteries may be arranged in parallel. The embodiments of the present application do not impose specific restrictions on this. In addition, the length direction of the protective housing 100 is parallel to the X-axis direction, the width direction of the protective housing 100 is parallel to the Y-axis direction, and the height direction of the protective housing 100 is parallel to the Z-axis direction.

[0031] It should be noted that the directional words such as “outside” and “inside” mentioned in the embodiment of the present application when describing the energy storage device 100a are all in Figure 1 The energy storage device 100a is described in terms of its orientation, with the side facing away from the interior of the protective housing 100 being referred to as “outside” and the side facing the interior of the protective housing 100 being referred to as “inside”. Similar descriptions hereinbelow may be understood in the same manner.

[0032] Please refer to Figures 2 to 4 , Figure 2 yes Figure 1 The schematic diagram of the exploded structure of the protective housing 100 in the energy storage device 100a is shown. Figure 3 yes Figure 2 The schematic diagram of the structure of the housing 110 in the protective housing 100 is shown. Figure 4 yes Figure 3 The structure of the housing 110 is shown in another perspective.

[0033] In this embodiment, the protective shell 100 includes a shell 110 and a cover assembly 120, and the cover assembly 120 covers the top side of the shell 110. Among them, the shell 110 is provided with a receiving cavity 110a. The receiving cavity 110a can be used to receive a battery module. The shell 110 also includes a bottom shell 11, a side shell 12, a limiting body 13 and a plurality of reinforcing ribs 15. Specifically, the side shell 12 is arranged around the edge of the bottom shell 11, and is fixedly connected to the bottom shell 11, and is enclosed with the bottom shell 11 to form a receiving cavity 110a. The limiting body 13 is arranged in the receiving cavity 110a, and is fixedly connected to the side shell 12. The surface of the limiting body 13 facing away from the side shell 12 is used to limit the battery module. A plurality of reinforcing ribs 15 are arranged at intervals from each other and are fixedly connected between the side shell 12 and the surface of the limiting body 13 facing the side shell 12 to enhance the structural strength between the limiting body 13 and the side shell 12, avoid deformation of the limiting body 13, and ensure that the limiting body 13 can play a limiting role on the battery module.

[0034] In this embodiment, the bottom shell 11 is provided with a plurality of recesses 111. The openings of the plurality of recesses 111 are all located on the surface of the bottom shell 11 away from the side shell 12. The plurality of recesses 111 are all recessed from the surface of the bottom shell 11 away from the side shell 12 toward the side shell 12. Exemplarily, along the X-axis direction, the plurality of recesses 111 are arranged at intervals.

[0035] It can be understood that when the protective shell 100 is placed on the ground, by providing a plurality of recesses 111 on the bottom shell 11, the contact area between the shell 110 of the protective shell 100 and the ground can be reduced, and the friction coefficient between the shell 110 and the ground can be increased, thereby helping to increase the friction between the shell 110 of the protective shell 100 and the ground, so that the shell 110 has an anti-slip effect.

[0036] Please refer to Figure 3 , Figure 5 and Figure 6 , Figure 5 yes Figure 3 The schematic diagram of the structure of the housing 110 at another angle is shown. Figure 6 yes Figure 3 The structure diagram of the housing 110 after being cut along AA is shown. Here, “cut along AA” means cutting along the plane where the AA line is located, and similar descriptions in the following text can be understood in the same way.

[0037] The side shell 12 includes two first sub-side panels 121 and two second sub-side panels 122. In the length direction (X-axis direction in the figure) of the protective housing 100, the two first sub-side panels 121 are spaced apart and arranged opposite to each other. The two second sub-side panels 122 are connected between the two first sub-side panels 121. In the Y-axis direction, the two second sub-side panels 122 are spaced apart and arranged opposite to each other.

[0038] In this embodiment, the limiting body 13 protrudes from the surface of the side shell 12 toward the receiving cavity 110a in a direction away from the side shell 12. The limiting body 13 can abut against the battery module of the energy storage device 100a to limit the battery module. Specifically, the limiting body 13 includes a guide surface 13a. Specifically, the guide surface 13a is located on the side of the limiting body 13 away from the bottom shell 11. The guide surface 13a includes a first side 131 close to the side shell 12 and a second side 132 arranged opposite to the first side 131. In the direction from the second side 132 to the first side 131, the distance between the guide surface 13a and the bottom shell 11 gradually decreases. In other words, the guide surface 13a of the limiting body 13 is inclined so that the battery module can be smoothly installed in the receiving cavity 110a of the shell 110.

[0039] In addition, when the battery module is installed in the receiving cavity 110a, along the Z-axis direction, the distance between the second side 132 of the guide surface 13a of the limiting body 13 and the bottom shell 11 is smaller than the distance between the surface of the battery of the battery module away from the bottom shell and the bottom shell. In other words, along the Z-axis direction, the surface of the battery away from the bottom shell 11 protrudes relative to the limiting body 13 of the side shell 12.

[0040] It should be understood that in the assembly process of the battery module of the existing energy storage device 100a, it is usually necessary to first arrange multiple batteries neatly outside the shell 110 according to the capacity and voltage requirements required in the actual production process, and then weld the multiple batteries and the electrical connecting pieces used to connect the multiple batteries in series or in parallel. Then, the overall structure of the multiple batteries and the electrical connecting pieces after welding is placed in the shell 110. In the energy storage device 100a provided in the present application, by making the surface of the battery away from the bottom shell 11 protrude relative to the limit body 13 of the side shell 12, multiple batteries can be directly welded with the electrical connecting pieces in the shell 110, without having to weld the batteries with the electrical connecting pieces first and then place them in the shell 110, thereby helping to optimize the assembly process of the battery module, shorten the assembly time of the battery module, and further help to improve the production efficiency of the energy storage device 100a.

[0041] The limiting body 13 also includes two first limiting portions 13b and two second limiting portions 13c, and the two first limiting portions 13b and the two second limiting portions 13c are arranged at intervals from each other. Among them, the surface of each first limiting portion 13b and each second limiting portion 13c away from the side shell 12 is used to limit the battery module. In some other embodiments, the two first limiting portions 13b and the two second limiting portions 13c can also be integrally formed.

[0042] In this embodiment, along the X-axis direction, the two first limiting portions 13b are spaced and arranged opposite to each other. Specifically, each first limiting portion 13b is located on the surface of a first sub-side plate 121 facing the accommodating cavity 110a. Each first limiting portion 13b includes a first sub-limiting portion 133 and two second sub-limiting portions 134. Along the width direction of the protective shell 100 (the Y-axis direction shown in the figure), the first sub-limiting portion 133 and the two second sub-limiting portions 134 are spaced from each other, and the first sub-limiting portion 133 is located between the two second sub-limiting portions 134. Along the length direction of the protective shell 100 (the X-axis direction shown in the figure), the first sub-limiting portion 133 is used to be spaced and arranged opposite to the battery module, and the surfaces of the two second sub-limiting portions 134 facing away from the side shell 12 are both used to limit the battery module. This arrangement can reserve space for the battery module when the batteries in the battery module swell, thereby helping to reduce the force exerted on the shell 110 when the batteries in the battery module swell, thereby helping to extend the service life of the shell 110.

[0043] It can be understood that by providing a first limiting portion 13b on the surface of each first sub-side plate 121 facing the receiving cavity 110a, when the battery module is installed in the receiving cavity 110a, the battery module can be limited in the length direction (X-axis direction as shown in the figure) to prevent the battery module from being displaced due to expansion during use and to avoid the battery module from moving along the X-axis direction.

[0044] Along the width direction of the protective housing 100, the two second limiting portions 13c are spaced and arranged opposite to each other. Each second limiting portion 13c is located on the surface of a second sub-side plate 122 facing the receiving cavity 110a. It can be understood that by providing a second limiting portion 13c on the surface of each second sub-side plate 122 facing the receiving cavity 110a, the battery module can be limited in the width direction (the Y-axis direction in the figure), preventing the battery module from being displaced due to expansion during use, and avoiding the battery module from moving along the Y-axis direction.

[0045] In this embodiment, by setting a limiter 13 inside the protective shell 100, the battery module can be limited in the length direction and width direction of the battery module respectively to prevent the battery module from moving along the X-axis direction and the Y-axis direction. At the same time, this setting can also reduce the amount of foam used in the energy storage device, avoid the battery module being wrapped by foam, and thus facilitate the heat dissipation of the battery module. At the same time, setting the limiter 13 in the side shell 12 can also strengthen the structural strength of the shell 110 in the protective shell 100 and improve the reliability of the protective shell 100.

[0046] In addition, each first limiting portion 13b is further provided with a mounting hole 135, and the opening of the mounting hole 135 is located on the surface of the first limiting portion 13b away from the bottom shell 11. The mounting hole 135 is used to fix the pressure strip or pressure plate of the energy storage device (100a). Specifically, the mounting hole 135 is provided in the first sub-limiting portion 133. Exemplarily, there are two mounting holes 135. Along the Y-axis direction, the two mounting holes 135 are arranged at intervals.

[0047] It is understandable that by providing a mounting hole 135 on each first limiting portion 13b of the limiting body 13, a fixing hole position can be provided for installing a pressure strip or a pressure plate in the subsequent assembly process of the energy storage device 100a. The interlocking fixation between the pressure strip or the pressure plate and the first limiting portion 13b realizes the limitation of the height direction (Z-axis direction in the figure), so that the battery module is integrated with the shell 110 of the protective housing 100, thereby realizing the fixation and restraint of the battery module in the shell 110.

[0048] In this embodiment, the plurality of reinforcing ribs 15 include a plurality of first reinforcing ribs 151 and a plurality of second reinforcing ribs 152. The plurality of reinforcing ribs 151 can be divided into two groups. Along the X-axis direction, the two groups of first reinforcing ribs 151 are spaced and arranged opposite to each other. Exemplarily, each group includes two first reinforcing ribs 151. Along the Y-axis direction, the two first reinforcing ribs are spaced apart. Each first reinforcing rib 151 is fixedly connected between a first sub-side plate 121 and a surface of a second sub-limiting portion 134 facing the first sub-side plate 121.

[0049] The plurality of second reinforcing ribs 152 can be divided into two groups. Along the Y-axis direction, the two groups of second reinforcing ribs 152 are spaced and arranged opposite to each other. Exemplarily, each group has five second reinforcing ribs 152. Along the X-axis direction, the five second reinforcing ribs 152 are spaced and arranged. Each second reinforcing rib 152 is fixedly connected between a second sub-side plate 122 and a surface of a second limiting portion 13c facing the second sub-side plate 122.

[0050] Please continue reading Figure 6 . The shell 110 is also provided with a first locking portion 14. Specifically, the first locking portion 14 is provided on the outer surface of the shell 110, and is provided near the opening of the shell 110. In the present embodiment, there are a plurality of first locking portions 14, and the plurality of first locking portions 14 are provided at intervals around the periphery of the shell 110. Exemplarily, the first locking portion 14 is a card slot. Specifically, the openings of the first locking portions 14 are all located on the outer surface of the shell 110, and the first locking portion 14 is recessed from the outer surface of the shell 110 toward the inner surface of the shell 110. In some other embodiments, the first locking portion 14 may also be a buckle.

[0051] Please refer to Figure 7 , Figure 8 and Fig. 9, Figure 7 yes Figure 2 The structural schematic diagram of the cover assembly 120 in the protective housing 100 is shown. Figure 8 yes Figure 7 The schematic diagram of the structure of the cover body 20 and the switch trigger arm 60 in the cover body assembly 120 is shown. Fig. 9 yes Figure 8 The structure diagram of the cover body 20 and the switch trigger arm 60 is shown at another angle.

[0052] The cover assembly 120 is mounted on the top side of the housing 110 and covers the receiving cavity 110a of the housing 110. In this embodiment, the cover assembly 120 includes a cover 20, a positive pole 30, a negative pole 40, a lifting rope 50, a switch trigger arm 60 and a waterproof breathable membrane (not shown). The positive pole 30, the negative pole 40, the lifting rope 50, the switch trigger arm 60 and the waterproof breathable membrane are all mounted on the cover 20.

[0053] In this embodiment, the cover body 20 includes a peripheral side surface 201, a top surface 202 and a connecting surface 203. The peripheral side surface 201 is arranged around the top surface 202. Along the height direction of the protective shell 100 (Z-axis direction in the figure), the top surface 202 is located on the side of the peripheral side surface 201 away from the shell 110. The connecting surface 203 is connected between the top surface 202 and the peripheral side surface 201. In other words, the connecting surface 203 is arranged at an angle. This arrangement can prevent rainwater from accumulating on the cover body 20, thereby helping to ensure the reliability of the energy storage device 100a.

[0054] Specifically, the peripheral side surface 201 includes two first side surfaces 2011 and two second side surfaces 2012. Among them, along the length direction of the cover body 20 (the X-axis direction shown in the figure), the two first side surfaces 2011 are spaced apart and arranged opposite to each other. The two second side surfaces 2012 are fixedly connected between the two first side surfaces 2011. Along the width direction of the cover body 20, the two second side surfaces 2012 are spaced apart and arranged opposite to each other. The top surface 202 is connected between the two second side surfaces 2012. Along the length direction of the cover body 20 (the X-axis direction shown in the figure), the top surface 202 is spaced apart from the two first side surfaces 2011. Along the height direction of the protective shell 100 (the Z-axis direction shown in the figure), the top surface 202 is located on the side of the first side surface 2011 that is away from the shell 110.

[0055] In this embodiment, there are two connection surfaces 203. Along the length direction of the cover body 20 (the X-axis direction in the figure), the two connection surfaces 203 are respectively located on opposite sides of the top surface 202. Specifically, each connection surface 204 is fixedly connected between the top surface 202 and a first side surface 2011. In other words, each connection surface 203 is arranged obliquely.

[0056] The cover body 20 is also provided with a positive through hole 21, a negative through hole 22, a vent hole 23, a matching hole 24, two mounting grooves 25, an assembly groove 26 and a communication mounting hole 27. Among them, the positive through hole 21, the negative through hole 22, the vent hole 23 and the matching hole 24 all penetrate the cover body 20 along the thickness direction of the cover body 20 (Z-axis direction in the figure), and are arranged at intervals from each other. Specifically, the positive through hole 21 and the negative through hole 22 are both located on one side of the cover body 20 in the Y-axis direction. Along the X-axis direction, the positive through hole 21 and the negative through hole 22 are arranged at intervals. The matching hole 24 is located on the other side of the cover body 20 in the Y-axis direction. Specifically, the opening of the matching hole 24 is located on a connecting surface 204.

[0057] The vent hole 23 is located on one side of the cover body 20 in the length direction. The vent hole 23 is conducive to air replacement of the protective shell 100, avoiding high pressure inside the protective shell 100, thereby avoiding swelling of the battery module due to the internal high pressure. The assembly groove 26 is arranged around the circumference of the vent hole 23. Specifically, the opening of the assembly groove 26 is located on the inner surface of the cover body 20, and the assembly groove 26 is recessed from the inner surface of the cover body 20 to the outer surface, and passes through the hole wall of the vent hole 23.

[0058] The openings of the two mounting grooves 25 are both located on the outer surface of the cover body 20. The two mounting grooves 25 are both recessed from the outer surface of the cover body 20 toward the inner surface, and both penetrate part of the outer side surface of the cover body 20, and are spaced apart from the positive through hole 21, the negative through hole 22 and the matching hole 24. Along the X-axis direction, the two mounting grooves 25 are spaced apart. The communication mounting hole 27 is located on one side of the cover body 20 in the X-axis direction, and penetrates the cover body 20 in the X-axis direction, and is spaced apart from the mounting groove 25. Exemplarily, there are two communication mounting holes 27. Along the Y-axis direction, the two communication mounting holes 27 are spaced apart. Both communication mounting holes 27 are used to install a communication interface so that the energy storage device 100a can transmit signals with other devices.

[0059] The cover 20 is also provided with a plurality of fixing posts 28, which are all located on the surface of the cover 20 facing the housing 110, and are spaced apart from each other and spaced apart from the battery module. The plurality of fixing posts 28 protrude from the surface of the cover 20 facing the housing 110 toward the housing 110. The fixing posts 28 are used to fix the battery management system (BMS) of the energy storage device 100a.

[0060] In this embodiment, the plurality of fixing columns 28 can be divided into two groups. Along the Y-axis direction, the two groups of fixing columns 28 are spaced apart. Exemplarily, each group includes two fixing columns 28. Along the X-axis direction, the two fixing columns 28 are spaced apart. Among them, along the Z-axis direction, each fixing column 28 is provided with a fixing hole 281, and the opening of the fixing hole 281 is located on the surface of the fixing column 28 away from the cover body 20. The fixing hole 281 is recessed from the surface of the fixing column 28 away from the cover body 20 toward the cover body 20. The fixing hole 281 is used to fix components such as screws so that the BMS can be assembled with the fixing column 28.

[0061] In addition, the height of each fixing column 28 is equal to or greater than 15 mm. Under this setting, when the BMS is installed on the cover 20, the BMS and the surface of the cover 20 facing the battery module are spaced apart. There is a reserved space between the BMS and the cover 20, which can prevent the cover 20 from getting hot due to the high temperature generated when the BMS is working. In addition, the cover 20 is usually made of plastic material, and this setting can also prevent the cover 20 from becoming soft due to the high temperature of the BMS, thereby ensuring the reliability of the cover 20.

[0062] See also Fig.10 , Fig.10 yes Figure 8 The structure diagram of the cover body 20 after being cut open along line BB is shown.

[0063] In this embodiment, the cover body 20 is further provided with a boss 29. The boss 29 is provided on the bottom side of the cover body 20 and is arranged around the periphery of the cover body 20. The boss 29 is provided with a glue groove 291 and a second locking portion 292. Specifically, the opening of the glue groove 291 is located at the bottom surface of the boss 29, and the glue groove 291 is arranged around the periphery of the cover body 20. The glue groove 291 has a first groove side wall 2911, a second groove side wall 2912 and a groove bottom wall 2913, the first groove side wall 2911 and the second groove side wall 2912 are spaced and arranged oppositely, and the groove bottom wall 2913 is connected between the first groove side wall 2911 and the second groove side wall 2912. The second locking portion 292 is provided on the second groove side wall 2912. In this embodiment, there are multiple second locking portions 292, and the multiple second locking portions 292 are spaced around the periphery of the cover body 20. Exemplarily, the second locking portion 292 is a buckle. Specifically, the second locking portion 292 protrudes from the second groove side wall 2912 toward the first groove side wall 2911. In some other embodiments, the second locking portion 292 may also be a locking groove.

[0064] Please refer again Figures 7 to 9In this embodiment, the positive electrode column 30 is installed in the positive electrode through hole 21, and the negative electrode column 40 is installed in the negative electrode through hole 22. The positive electrode column 30 and the negative electrode column 40 are both exposed relative to the cover body, so that the energy storage device 100a can be electrically connected to an external device or equipment, so that the energy storage device 100a can supply power to the external device or equipment.

[0065] The switch trigger arm 60 is located in the matching hole 24. The switch trigger arm 60 is used to press the switch button of the energy storage device 100a. Specifically, the switch trigger arm 60 includes a fixed end 61 and a movable end 62 disposed opposite to the fixed end 61. The fixed end 61 is fixedly connected to the hole wall of the matching hole 24. The movable end 62 can move relative to the cover body 20 along the thickness direction of the cover body 20.

[0066] In this embodiment, the movable end 62 of the switch trigger arm 60 is arranged corresponding to the switch button of the energy storage device 100a. Under this arrangement, when the user presses the movable end 62 of the switch trigger arm 60, the movable end 62 moves relative to the cover body 20 along the thickness direction of the cover body 20 toward the switch button and contacts the switch button, thereby turning on or off the energy storage device 100a.

[0067] The lifting rope 50 is installed between the groove walls of the two installation grooves 25 to increase the portability of the energy storage device 100a, so that the user can carry the energy storage device 100a. The waterproof breathable membrane is fixedly installed in the assembly groove 26 and covers the air hole 23. The waterproof breathable membrane not only has a waterproof function, which can prevent moisture in the external environment air from entering the interior of the protective shell 100 to avoid affecting the performance of the battery module, but also has a breathable function to ensure that the function of the air hole 23 is not affected.

[0068] Please also read Figure 2 and Fig.11 , Fig.11 yes Figure 1 The schematic diagram of the cross-sectional structure of the protective housing 100 in the energy storage device 100a is shown after being cut along CC.

[0069] When the cover assembly 120 is installed on the top side of the housing 110, the cover 20 covers the top side of the housing 110. The first groove side wall 2911 of the glue groove 291 of the cover 20 is spaced apart from the inner surface of the housing 110. The second groove side wall 2912 of the glue groove 291 is spaced apart from the outer surface of the housing 110. The groove bottom wall 2913 of the glue groove 291 is spaced apart from the top surface of the housing 110. Each first locking portion 14 and a second locking portion 292 are detachably locked to each other.

[0070] It is understandable that after the sealant is injected into the glue groove 291, the sealant needs to be cured. During the curing process of the sealant, the cover body 20 and the shell 110 can be interlocked and fixed by the first locking portion 14 and the second locking portion 292 to solidify the sealant without the need to fix the cover body 20 and the shell 110 with a strap, which can prevent the cover body 20 and the shell 110 from being separated due to the tension of the sealant, thereby improving the assembly efficiency of the protective housing 100, reducing the occupied area of ​​the production site, and avoiding waste of resources.

[0071] The protective shell 100 provided in the present application can limit the battery module in the length direction, width direction and height direction of the battery module respectively by setting a limit body 13 in the shell 110 and setting a mounting hole 135 for fixing the pressure strip or the pressure plate on the limit body 13, so as to realize the fixed installation of the battery module in the shell 110, without using a large amount of foam to fill the gap between the shell 110 and the battery module, thereby reducing the amount of foam used in the energy storage device 100a, avoiding the battery module being wrapped by foam, preventing heat accumulation on the battery module, and thus facilitating extending the service life of the energy storage device 100a.

[0072] In addition, the housing 110 of the energy storage device 100a provided in the present application can be used as a jig for assembling a battery module. During the assembly process of the battery module, multiple batteries can be directly assembled with components such as electrical connectors in the housing 110, without first welding the batteries to the electrical connectors and then placing them in the housing 110, thereby helping to optimize the assembly process of the battery module, shorten the assembly time of the battery module, and further help improve the production efficiency of the energy storage device 100a.

[0073] The above are only some embodiments and implementation methods of the present application, and the protection scope of the present application is not limited thereto. Any changes or substitutions that can be easily thought of by any person skilled in the art within the technical scope disclosed in the present application should be included in the protection scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.

Claims

1. A protective housing for an energy storage device, characterized in that: The protective shell includes a shell, which includes a bottom shell, a side shell and a limiting body. The side shell is fixedly connected to the bottom shell, and is arranged around the bottom shell, and is enclosed with the bottom shell to form a receiving cavity, and the receiving cavity is used to receive the battery module of the energy storage device. The limiting body is arranged in the receiving cavity and is fixedly connected to the side shell. The surface of the limiting body facing away from the side shell is used to limit the battery module.

2. The protective housing according to claim 1, characterized in that: The limiting body includes two first limiting parts and two second limiting parts. Along the length direction of the protective shell, the two first limiting parts are spaced apart and arranged opposite to each other. Along the width direction of the protective shell, the two second limiting parts are spaced apart and arranged opposite to each other. The surface of each first limiting part and each second limiting part facing away from the side shell is used to limit the battery module.

3. The protective housing according to claim 2, characterized in that: Each of the first limiting portions includes a first sub-limiting portion and two second sub-limiting portions. Along the width direction of the protective shell, the first sub-limiting portion and the two second sub-limiting portions are spaced apart from each other, and the first sub-limiting portion is located between the two second sub-limiting portions. Along the length direction of the protective shell, the first sub-limiting portion is used to be spaced apart from and opposite to the battery module, and the surfaces of the two second sub-limiting portions facing away from the side shell are used to limit the battery module.

4. The protective housing according to claim 2 or 3, characterized in that: Each of the first limiting portions is further provided with a mounting hole, the opening of the mounting hole is located on the surface of the first limiting portion away from the bottom shell, and the mounting hole is used to fix the pressure strip of the energy storage device.

5. The protective housing according to claim 1, characterized in that: The limiting body also includes a guide surface, which is located on the side of the limiting body away from the bottom shell. The guide surface includes a first side close to the side shell and a second side arranged opposite to the first side. In the direction from the first side to the second side, the distance between the guide surface and the bottom shell gradually decreases.

6. The protective housing according to claim 1, characterized in that: The shell body further comprises a plurality of reinforcing ribs, which are arranged at intervals from each other and are all fixedly connected between the side shell and the surface of the limiting body facing the side shell.

7. The protective housing according to claim 1, characterized in that: The bottom shell is provided with a plurality of recesses, the openings of the plurality of recesses are all located on the surface of the bottom shell away from the side shell, and the plurality of recesses are spaced apart from each other.

8. The protective housing according to claim 1, characterized in that: The protective housing further comprises a cover body and a switch trigger arm, wherein the cover body is mounted on the top side of the housing and covers the receiving cavity, and the cover body is provided with a matching hole, and the matching hole penetrates the cover body along the thickness direction of the cover body; The switch trigger arm is located in the matching hole, and the switch trigger arm includes a fixed end and a movable end arranged opposite to the fixed end, the fixed end is fixedly connected to the hole wall of the matching hole, and the movable end can move relative to the cover body along the thickness direction of the cover body, and the movable end is used to press the switch button of the energy storage device.

9. The protective housing according to claim 8, characterized in that: The cover body includes a peripheral side surface, a top surface and a connecting surface. The peripheral side surface is arranged around the top surface. Along the height direction of the protective shell, the top surface is located on the side of the peripheral side surface away from the shell, and the connecting surface is connected between the top surface and the peripheral side surface; the opening of the mating hole is located on the connecting surface.

10. An energy storage device, characterized in that: It comprises a battery module and a protective shell as claimed in any one of claims 1 to 9, wherein the battery module is installed in the accommodating cavity and abuts against the limiting body.

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