Battery pack box body, battery pack and energy storage system

Abstract

The utility model provides a battery pack box body, a battery pack and an energy storage system.The battery pack box body comprises a shell and a drawing structure, the shell comprises a supporting plate and a box cover which are arranged in the first direction, the box cover covers one side plate face of the supporting plate, and a mounting cavity is defined by the box cover and the supporting plate; an opening communicated with the mounting cavity is formed in one side of the box cover in the second direction, and an included angle is formed between the second direction and the first direction; the drawing structure comprises a bottom plate and a side plate which are mutually connected to form an included angle, the bottom plate and the side, facing the box cover, of the supporting plate are oppositely arranged, and the side, deviating from the supporting plate, of the bottom plate is configured to support the battery module; the side plate is located at one end of the bottom plate in the second direction, the bottom plate is slidably supported on the supporting plate in the second direction and has a drawing-out position and a containing position, the bottom plate is located in the mounting cavity when located in the containing position, and the side plate covers the opening; when the bottom plate is in the drawing position, the side plate opens the opening, and the bottom plate at least partially extends out of the opening. The battery pack box provided by the utility model can improve the maintenance efficiency of the battery pack.

Description

Technical Field

[0001] The present application relates to the field of energy storage technology, and specifically to a battery pack case, a battery pack and an energy storage system. Background Art

[0002] In the related art, a battery pack usually includes a battery pack case and a battery module installed in the battery pack case. When it is necessary to maintain the part of the battery module that is blocked by the outer shell, the battery pack case needs to be disassembled to expose the part of the battery module that needs to be maintained. Battery packs usually have the characteristics of large capacity, large volume, and heavy weight. Especially for battery packs used in energy storage systems, since there is no need to consider portability too much, the battery pack has a larger capacity and volume, and is heavier. It is very cumbersome to disassemble the battery pack case to maintain the internal battery module, which affects the maintenance efficiency of the battery pack. Utility Model Content

[0003] The embodiments of the present application provide a battery pack case, a battery pack and an energy storage system, which can improve the technical problem in the related art that the operation of disassembling the battery pack case to maintain the battery module is cumbersome, resulting in low maintenance efficiency of the battery pack.

[0004] In a first aspect, an embodiment of the present application provides a battery pack case, comprising:

[0005] A housing, the housing comprising a support plate and a box cover arranged along a first direction, the box cover is arranged on a side surface of the support plate, the box cover and the support plate are enclosed to form a mounting cavity, and an opening communicating with the mounting cavity is formed on one side of the box cover along a second direction, and the second direction forms an angle with the first direction;

[0006] The pull-out structure comprises a bottom plate and a side plate connected to each other at an angle, the bottom plate and the support plate being arranged opposite to each other on a side facing the box cover, and the side of the bottom plate facing away from the support plate is configured to support a battery module; the side plate is located at one end of the bottom plate along the second direction, the bottom plate is slidably supported on the support plate along the second direction, and has a pull-out position and a storage position, when the bottom plate is in the storage position, the bottom plate is located in the installation cavity, and the side plate covers the opening; when the bottom plate is in the pull-out position, the side plate opens the opening, and the bottom plate at least partially extends out of the opening.

[0007] In one embodiment, the support plate is provided with a ball bearing, and the ball bearing rolls and abuts against a side surface of the bottom plate facing the support plate.

[0008] In one embodiment, the support plate is provided with two guide portions, and the two guide portions are distributed on both sides of the base plate along the third direction, and the two guide portions are configured to abut against the base plate to limit the movement of the base plate in the third direction, and the first direction, the second direction and the third direction are arranged at angles to each other.

[0009] In one embodiment, a guide groove is formed on one side of the guide portion toward the bottom plate, the guide groove extends along the second direction, and the two side edges of the bottom plate along the third direction are slidably mounted in the two guide grooves in a one-to-one correspondence.

[0010] In one embodiment, the battery pack case further includes a sealing member, and when the bottom plate is in the storage position, the sealing member seals the gap between the side plate and the edge of the opening.

[0011] In one embodiment, the sealing member is disposed on a side of the side plate facing the housing and extends along the circumference of the side plate; or, the sealing member is disposed on the box cover and extends along the edge of the opening.

[0012] In one embodiment, the side plate is further provided with a through hole penetrating along the second direction; the battery pack box includes a sealing plate, and the sealing plate is provided on a side of the side plate away from the installation cavity;

[0013] The sealing plate is detachably connected to the side plate and closes the through hole; or, the sealing plate is movably connected to the side plate and can move relative to the side plate to open or close the through hole.

[0014] In one embodiment, the side panels and the bottom panel are integrally connected.

[0015] In one embodiment, the base plate is a liquid cooling plate.

[0016] In one embodiment, one end of the bottom plate connected to the side plate further includes a connecting portion, and the connecting portion is configured to be detachably connected to the supporting roller.

[0017] In one embodiment, the battery pack case further includes a fixing member, and the fixing member is configured to fixedly connect the bottom plate in the storage position to the support plate.

[0018] In a second aspect, an embodiment of the present application provides a battery pack, comprising:

[0019] A battery pack case, the battery pack case is the battery pack case as described above, the battery pack case comprises an outer shell and a pull-out structure, the outer shell comprises a support plate and a box cover arranged along a first direction, the box cover is arranged on a side plate surface of the support plate, the box cover and the support plate are enclosed to form a mounting cavity, the box cover is provided with an opening connected to the mounting cavity on one side along a second direction, and the second direction forms an angle with the first direction; the pull-out structure comprises a bottom plate and a side plate connected to each other at an angle, the bottom plate and the support plate are arranged opposite to each other on a side facing the box cover, and a side of the bottom plate facing away from the support plate is configured to support a battery module; the side plate is located at one end of the bottom plate along the second direction, the bottom plate is slidably supported on the support plate along the second direction, and has a pull-out position and a storage position, when the bottom plate is in the storage position, the bottom plate is located in the mounting cavity, and the side plate covers the opening; when the bottom plate is in the pull-out position, the side plate opens the opening, and the bottom plate at least partially extends out of the opening;

[0020] The battery module is arranged on a side of the bottom plate of the battery pack box away from the support plate.

[0021] In a third aspect, an embodiment of the present application provides an energy storage system, the energy storage system comprising the battery pack as described above, the battery pack comprising:

[0022] A battery pack case, the battery pack case is the battery pack case as described above, the battery pack case comprises an outer shell and a pull-out structure, the outer shell comprises a support plate and a box cover arranged along a first direction, the box cover is arranged on a side plate surface of the support plate, the box cover and the support plate are enclosed to form a mounting cavity, the box cover is provided with an opening connected to the mounting cavity on one side along a second direction, and the second direction forms an angle with the first direction; the pull-out structure comprises a bottom plate and a side plate connected to each other at an angle, the bottom plate and the support plate are arranged opposite to each other on a side facing the box cover, and a side of the bottom plate facing away from the support plate is configured to support a battery module; the side plate is located at one end of the bottom plate along the second direction, the bottom plate is slidably supported on the support plate along the second direction, and has a pull-out position and a storage position, when the bottom plate is in the storage position, the bottom plate is located in the mounting cavity, and the side plate covers the opening; when the bottom plate is in the pull-out position, the side plate opens the opening, and the bottom plate at least partially extends out of the opening;

[0023] The battery module is arranged on a side of the bottom plate of the battery pack box away from the support plate.

[0024] Beneficial effects of the embodiments of the present application:

[0025] The battery pack case, battery pack and energy storage system provided by the embodiment of the present application are provided with an opening connected to the internal installation cavity on one side of the case cover along the second direction, so that the bottom plate of the pull-out structure configured to support the battery module is supported on the support plate along the second direction, and can slide between the pull-out position and the storage position. When the bottom plate of the pull-out structure slides from the storage position to the pull-out position, the side plate of the pull-out structure opens the opening, and the bottom plate at least partially extends out of the opening, so that at least a part of the battery module can be taken out of the case cover, so as to facilitate the maintenance of the battery module. After the maintenance of the battery module is completed, the bottom plate of the pull-out structure is controlled to slide from the pull-out position to the storage position, so that the bottom plate of the pull-out structure is located in the installation cavity, and the battery module can be reinstalled into the installation cavity of the battery pack case, which is very convenient to operate and is conducive to improving the maintenance efficiency of the battery pack. At the same time, when the bottom plate of the pull-out structure is located in the storage position, by making the side plate of the pull-out structure cover the opening, it is conducive to improving the sealing performance of the installation cavity, thereby improving the working stability and service life of the battery pack and the energy storage system.

[0026] Finally, the pull-out structure supports the bottom plate on the support plate by sliding along the second direction, so that when the bottom plate slides between the pulled-out position and the stored position, the battery module can be quickly and conveniently maintained by opening and covering the opening of the box cover through the side panel. The pull-out structure does not need to set baffles on both sides of the battery module along the third direction and on the side of the battery module away from the side panel, which is beneficial to shorten the distance between the battery module and the box cover, improve the structural compactness of the battery pack, and make the energy density of the battery pack and the energy storage system higher. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For those skilled in the art, other drawings can be obtained based on these drawings without creative work.

[0028] Figure 1 is a schematic structural diagram of an embodiment of a battery pack provided in an embodiment of the present application;

[0029] Figure 2 yes Figure 1 A schematic diagram of the structure of the drawer structure of the middle battery pack during the process of sliding the bottom plate from the storage position to the drawer position;

[0030] Figure 3 is a schematic diagram of the exploded structure of an embodiment of a battery pack provided in an embodiment of the present application;

[0031] Figure 4 is a structural schematic diagram of an embodiment of a support plate provided in an embodiment of the present application;

[0032] Figure 5 It is a structural schematic diagram of an embodiment of the pull-out structure provided in an embodiment of the present application.

[0033] Battery pack 100; battery pack case 110; mounting cavity 1100; housing 111; support plate 1110; mounting groove 1111; guide portion 1112; guide groove 1113; notch 1114; guide section 1115; limit section 1116; positioning portion 1117; box cover 1118; opening 1119; ball 112; pull-out structure 113; side plate 1130; bottom plate 1131; support portion 1132; connecting portion 1133; through hole 1134; sealing plate 1135; battery module 120; battery cell 121; end plate 122; locking member 131; fixing member 132; support roller 140; connecting rod 141; handle 150; insulating sheet 160; battery control unit 170; first direction Z; second direction X; third direction Y. DETAILED DESCRIPTION

[0034] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present application. In addition, it should be understood that the specific implementation methods described herein are only used to illustrate and explain the present application, and are not used to limit the present application. In the present application, unless otherwise stated, the directional words such as "upper" and "lower" used generally refer to the upper and lower parts of the device in actual use or working state, specifically the drawing direction in the accompanying drawings; while "inside" and "outside" refer to the outline of the device.

[0035] Embodiments of the present application provide a battery pack case, a battery pack, and an energy storage system.

[0036] Figure 1 It is a structural schematic diagram of an embodiment of a battery pack provided in an embodiment of the present application. Figure 2 yes Figure 1 Schematic diagram of the structure of the drawer structure of the battery pack during the sliding process from the storage position to the drawer position. Figure 3 Schematic diagram of the exploded structure of an embodiment of the battery pack provided in the present application. Figures 1 to 3 The battery pack 100 includes a battery pack case 110 and a battery module 120 . The battery pack case 110 includes an installation cavity 1100 . The battery module 120 is disposed in the installation cavity 1100 of the battery pack case 110 .

[0037] In the related art, when it is necessary to maintain the part of the battery module that is blocked by the battery pack case, especially when it is necessary to maintain the battery module deep inside the battery pack case, it is necessary to disassemble the battery pack case to expose the part of the battery module that needs to be maintained. However, the battery pack usually has the characteristics of large capacity, large volume and heavy weight. Especially for the battery pack used in the energy storage system, because there is no need to consider portability too much, the battery pack has a larger capacity and volume, and is heavier. It is very cumbersome to disassemble the battery pack case to maintain the internal battery module, which affects the maintenance efficiency of the battery pack.

[0038] In order to improve the above problems, the present application embodiment provides a battery pack box. Figures 1 to 3 As shown, the battery pack case 110 includes a shell 111 and a pull-out structure 113. The shell 111 includes a support plate 1110 and a cover 1118 arranged along a first direction Z. The cover 1118 is covered on a side surface of the support plate 1110. The cover 1118 and the support plate 1110 enclose a mounting cavity 1100. The battery module 120 of the battery pack 100 can be installed in the mounting cavity 1100 of the shell 111.

[0039] In some embodiments, the box cover 1118 may be provided with an opening 1119 connected to the installation cavity 1100 on one side along the second direction X, and the second direction X forms an angle with the first direction Z. At the same time, the battery pack box 110 also includes a pull-out structure 113, which includes a bottom plate 1131 and a side plate 1130 connected to each other at an angle, the bottom plate 1131 and the support plate 1110 are arranged opposite to each other on the side facing the box cover 1118, and the side of the bottom plate 1131 facing away from the support plate 1110 is configured to support the battery module 120. The side plate 1130 is located at one end of the bottom plate 1131 along the second direction X, and the bottom plate 1131 is slidably supported on the support plate 1110 along the second direction X, and has a pull-out position and a storage position, such as Figure 1 As shown, when the bottom plate 1131 is in the storage position, the bottom plate 1131 is located in the installation cavity 1100, and the side plate 1130 covers the opening 1119; Figure 2 As shown, when the bottom plate 1131 is in the withdrawn position, the side plate 1130 opens the opening 1119 , and the bottom plate 1131 at least partially extends out of the opening 1119 .

[0040] The battery pack case 110 provided in the embodiment of the present application is provided with an opening 1119 connected to the installation cavity 1100 on one side of the case cover 1118 along the second direction X, so that the bottom plate 1131 of the pull-out structure 113 is slidably supported on the support plate 1110 of the outer shell 111 along the second direction X and can slide between the pull-out position and the storage position. At the same time, the side of the bottom plate 1131 facing away from the support plate 1110 is configured to support the battery module 120. When the bottom plate 1131 of the pulling structure 113 slides from the storage position to the pulled-out position at least partially extending out of the opening 1119 of the box cover 1118, the side plate 1130 connected to the bottom plate 1131 and the battery module 120 supported by the bottom plate 1131 can be driven to move together, so that the side plate 1130 opens the opening 1119 of the box cover 1118, and a part of the battery module 120 moves to the outside of the opening 1119 of the box cover 1118, so that the maintenance personnel can maintain the battery module 120. After the maintenance is completed, the bottom plate 1131 can be slid from the pulled-out position to the storage position in the installation cavity 1100, thereby driving the maintained battery module 120 back into the installation cavity 1100, and the side plate 1130 re-covers the opening 1119 of the box cover 1118, thereby preventing external moisture and impurities from entering the installation cavity 1100 through the opening 1119 to a certain extent.

[0041] Therefore, the battery pack case 110 provided in the embodiment of the present application can control the bottom plate 1131 of the pull-out structure 113 to slide from the storage position to the extraction position, so that the side plate 1130 can open the opening 1119 of the case cover 1118, and bring at least a portion of the battery module 120 out of the case cover 1118, so as to facilitate the maintenance of the battery module 120. After the maintenance of the battery module 120 is completed, the bottom plate 1131 is controlled to slide from the extraction position to the storage position, so that the side plate 1130 covers the opening 1119 of the case cover 1118, and the bottom plate 1131 is located in the installation cavity 1100, so that the battery module 120 can be reinstalled in the installation cavity 1100 of the battery pack case 110, which is very convenient to operate and is conducive to improving the maintenance efficiency of the battery pack 100.

[0042] Moreover, the pulling structure 113 supports the bottom plate 1131 on the support plate 1110 by sliding along the second direction X, so that when the bottom plate 1131 slides between the pulled-out position and the stored position, the opening 1119 of the box cover 1118 is opened and covered by the side plate 1130, so that the battery module 120 can be quickly and conveniently maintained. The pulling structure 113 does not need to set baffles on both sides of the battery module 120 along the third direction Y and on the side of the battery module 120 away from the side plate 1130, which is beneficial to shorten the distance between the battery module 120 and the box cover 1118, improve the structural compactness of the battery pack 100, and make the energy density of the battery pack 100 and the energy storage system higher.

[0043] It should be noted that the first direction Z and the second direction X can be perpendicular or set at a certain acute angle. In addition, the angle formed by the bottom plate 1131 and the side plate 1130 of the pull-out structure 113 can be an acute angle, a right angle or an obtuse angle, which can be determined according to the structure of the pull-out structure 113 and the shell 111.

[0044] In some embodiments, a ball bearing 112 may be provided on the support plate 1110, and the ball bearing 112 may roll and abut against a side surface of the bottom plate 1131 facing the support plate 1110. Thus, the bottom plate 1131 may slide more smoothly relative to the support plate 1110, so that maintenance personnel may more easily control the bottom plate 1131 of the pull-out structure 113 to slide between the withdrawn position and the stored position.

[0045] There are multiple balls 112 , and the balls 112 are spaced apart on the support plate 1110 to improve the support stability of the balls 112 on the bottom plate 1131 .

[0046] Specifically, Figure 3 and Figure 4 As shown, a mounting groove 1111 is provided on the support plate 1110, and the ball 112 is rotatably mounted in the mounting groove 1111, so that the ball 112 can rotate relative to the support plate 1110. When the bottom plate 1131 is arranged opposite to the side of the support plate 1110 facing the box cover 1118 and abuts against the ball 112, if the bottom plate 1131 slides relative to the support plate 1110 along the second direction X, the ball 112 can roll relative to the bottom plate 1131 on the plate surface of the bottom plate 1131 facing the side of the support plate 1110. Among them, a plurality of ball 112 are distributed in an array on the support plate 1110.

[0047] In some embodiments, Figure 3 and Figure 4 As shown, two guide portions 1112 may be provided on the support plate 1110, and the two guide portions 1112 are distributed on both sides of the bottom plate 1131 along the third direction Y, and the two guide portions 1112 are configured to abut against the bottom plate 1131 to limit the movement of the bottom plate 1131 in the third direction Y. Wherein, the first direction Z, the second direction X and the third direction Y are arranged at an angle to each other. Wherein, the angle formed between the first direction Z, the second direction X and the third direction Y may be a right angle or an acute angle. By respectively providing the guide portions 1112 on both sides of the bottom plate 1131 along the third direction Y, it is possible to limit the bottom plate 1131 from sliding in the third direction Y when sliding relative to the support plate 1110 along the second direction X, thereby improving the stability of the bottom plate 1131 sliding between the extraction position and the storage position.

[0048] A guide groove 1113 may be provided on one side of the guide portion 1112 facing the bottom plate 1131, the guide groove 1113 extending along the second direction X, and the two side edges of the bottom plate 1131 along the third direction Y are slidably installed in the two guide grooves 1113 in a one-to-one correspondence. The two guide grooves 1113 extending along the second direction X cooperate with the edges at both ends of the bottom plate 1131 along the third direction Y, so that the bottom plate 1131 can slide relative to the support plate 1110 more stably along the second direction X. Moreover, when a part of the guide portion 1112 is located at the side of the guide groove 1113 away from the support plate 1110, the part of the guide portion 1112 located at the side of the guide groove 1113 away from the support plate 1110 can also abut against the bottom plate 1131 to limit the bottom plate 1131 from moving in a direction away from the support plate 1110.

[0049] Specifically, the guide portion 1112 is protruding from a side surface of the support plate 1110 facing the bottom plate 1131. The guide portion 1112 includes a guide segment 1115 protruding from a side surface of the support plate 1110 facing the bottom plate 1131, and the guide segment 1115 extends along the second direction X. The guide segments 1115 of the two guide portions 1112 are distributed on both sides of the bottom plate 1131 in the third direction Y, and the two guide segments 1115 are configured to abut against the surfaces of both sides of the bottom plate 1131 along the third direction Y to limit the movement of the bottom plate 1131 in the third direction Y.

[0050] The guide portion 1112 further includes a limiting section 1116 protruding from the side of the guide section 1115 facing the bottom plate 1131. The limiting section 1116 is spaced apart from the support plate 1110, and the limiting section 1116, the guide section 1115 and the support plate 1110 are enclosed to form a guide groove 1113. The limiting section 1116 is located at one end of the guide section 1115 away from the support plate 1110.

[0051] In some embodiments, Figure 3 and Figure 4 As shown, a positioning portion 1117 can be provided on the support plate 1110, and the positioning portion 1117 is used to abut against one end of the bottom plate 1131 away from the side plate 1130 along the second direction X, so as to limit the movement of the bottom plate 1131 from the pulled-out position to the stored position, and prevent the bottom plate 1131 from sliding from the pulled-out position to the stored position and continuing to slide relative to the support plate 1110 and colliding with the box cover 1118.

[0052] At the same time, the positioning portion 1117 can also play a positioning role for the bottom plate 1131. When the bottom plate 1131 slides to a position abutting against the positioning portion 1117, it means that the bottom plate 1131 slides to a position where it can be fixed to the support plate 1110, so that the bottom plate 1131 and the support plate 1110 can be fixedly connected by the fixing member 132.

[0053] Specifically, a notch 1114 communicating with the guide groove 1113 is formed on one side of the guide portion 1112 along the second direction X, and the edges of the bottom plate 1131 on both sides along the third direction Y can be inserted from the notch 1114 into the corresponding guide groove 1113 along the second direction X. The positioning portion 1117 is located at one end of the guide groove 1113 away from the notch 1114 along the second direction X. The positioning portion 1117 is fixedly connected to the support plate 1110 and the guide portion 1112 to improve the structural strength of the positioning portion 1117, thereby improving the limiting effect of the positioning portion 1117 on the bottom plate 1131.

[0054] In some embodiments, the bottom plate 1131 can be a liquid cooling plate. Thus, the battery module 120 supported on the bottom plate 1131 can be cooled by the bottom plate 1131. Specifically, a pipeline for circulating cooling liquid is provided in the bottom plate 1131. The cooling liquid flowing in the pipeline can absorb the heat of the bottom plate 1131 to reduce the temperature of the bottom plate 1131, so that the bottom plate 1131 can cool the battery module 120.

[0055] like Figure 2 and Figure 3 As shown, the battery module 120 includes a battery cell 121, and a side of the battery cell 121 close to the bottom plate 1131 can be connected by thermal conductive adhesive, so that the heat of the battery cell 121 can be quickly transferred to the bottom plate 1131 through the thermal conductive adhesive. The battery module 120 includes a plurality of battery cells 121 stacked along the second direction X, and a side of each battery cell 121 close to the bottom plate 1131 is connected by thermal conductive adhesive.

[0056] The battery module 120 includes two end plates 122 distributed along the second direction X, and a plurality of battery cells 121 are clamped between the two end plates 122. The end plates 122 are fixedly connected to the bottom plate 1131 to improve the connection stability between the battery module 120 and the bottom plate 1131. Specifically, the bottom plate 1131 is provided with two support portions 1132, and the two support portions 1132 are spaced apart along the second direction X. The battery cells 121 of the battery module 120 are located between the two support portions 1132. The two end plates 122 are supported one by one on the side of the two support portions 1132 away from the support plate 1110, and are fixedly connected by the locking member 131. The locking member 131 passes through the end plate 122 from the side of the end plate 122 away from the support plate 1110 and is inserted into the support portion 1132, thereby fixing the end plate 122 to the corresponding support portion 1132.

[0057] In some embodiments, the side panels 1130 and the bottom panel 1131 of the pull-out structure 113 can be connected as one piece, thereby improving the connection stability of the side panels 1130 and the bottom panel 1131 and improving the structural strength of the side panels 1130 and the bottom panel 1131. Of course, the side panels 1130 and the bottom panel 1131 of the pull-out structure 113 can also be connected together by screw fixing, buckle connection, etc.

[0058] In some embodiments, the material of the bottom plate 1131 may include metal, so that the bottom plate 1131 has higher strength and better thermal conductivity.

[0059] In some embodiments, Figure 1 As shown, the battery pack case 110 further includes a fixing member 132, which is configured to fix the bottom plate 1131 in the storage position to the support plate 1110. When the bottom plate 1131 of the drawer structure is in the storage position, the bottom plate 1131 is fixedly connected to the support plate 1110 by the fixing member 132, so that the relative position of the bottom plate 1131 and the support member can be fixed, so that the bottom plate 1131 is stably maintained in the storage position, and the side plate 1130 stably covers the opening 1119 of the box cover 1118.

[0060] There may be a plurality of fixing members 132 to further improve the connection stability between the bottom plate 1131 and the support plate 1110 in the storage position. The plurality of fixing members 132 may be arranged in sequence along the third direction Y at intervals.

[0061] Specifically, a first mounting hole (not shown in the figure) penetrating along the first direction Z can be opened in the bottom plate 1131, and the first mounting hole is located on the side of the side plate 1130 away from the mounting cavity 1100. At the same time, a second mounting hole (not shown in the figure) is opened on the plate surface of the support plate 1110 facing the bottom plate 1131. When the bottom plate 1131 is in the storage position, the first mounting hole corresponds to the second mounting hole, and the fixing member 132 passes through the first mounting hole and is inserted into the second mounting hole, so that the bottom plate 1131 in the storage position is fixedly connected to the support plate 1110. The fixing member 132 can be a bolt, a screw, a pin, etc., which is not limited here.

[0062] There are multiple first mounting holes, which are arranged in sequence along the third direction Y. The number of second mounting holes is equal to the number of first mounting holes and corresponds one to one. The number of fixing members 132 is equal to the number of first mounting holes. The multiple fixing members 132 pass through the multiple first mounting holes and are inserted into the second mounting holes in a one-to-one correspondence, thereby fixing the bottom plate 1131 in the storage position to the support plate 1110.

[0063] In some embodiments, the battery pack case 110 may further include a seal (not shown in the figure). When the bottom plate 1131 is in the storage position, the seal seals the gap between the side plate 1130 and the edge of the opening 1119, thereby improving the sealing performance of the installation cavity 1100 in the battery pack case 110, which is beneficial to improving the working stability of the battery module 120.

[0064] The sealing member may be disposed on the side of the side plate 1130 facing the housing 111. When the bottom plate 1131 is in the storage position, the sealing member is clamped between the side plate 1130 and the edge of the opening 1119 of the box cover 1118, so as to close the gap between the side plate 1130 and the edge of the opening 1119. The sealing member may extend along the circumference of the side plate 1130, so that the sealing member can seal the gap between the edge of the opening 1119 and the side plate 1130, which is conducive to further improving the sealing effect of the gap between the side plate 1130 and the edge of the opening 1119.

[0065] In other embodiments, the sealing member may also be provided on the box cover 1118. When the bottom plate 1131 is in the storage position, the sealing member is clamped between the side plate 1130 and the edge of the opening 1119 of the box cover 1118, so as to close the gap between the side plate 1130 and the edge of the opening 1119. The sealing member may extend along the edge of the opening 1119, so that the sealing member can seal the gap between the multiple side edges of the opening 1119 and the side plate 1130, which is conducive to further improving the sealing effect of the gap between the side plate 1130 and the edge of the opening 1119.

[0066] Specifically, the sealing member may include a first sealing segment, a second sealing segment, and a third sealing segment connected in sequence, wherein the second sealing segment extends along the third direction Y and is located at an edge of the side plate 1130 or the opening 1119 away from the bottom plate 1131, so as to seal the gap between the edge of the side plate 1130 away from the bottom plate 1131 and the side plate 1130. The first sealing segment and the second sealing segment extend along the first direction Z, respectively, and are located at edges of the side plate 1130 or the opening 1119 on both sides along the third direction Y, so as to seal the gap between edges of the opening 1119 on both sides along the third direction Y and the side plate 1130.

[0067] In some embodiments, Figure 1 and Figure 5As shown, a through hole 1134 penetrating along the second direction X may also be provided on the side plate 1130 of the pull-out structure 113. When the bottom plate 1131 of the pull-out structure 113 is in the storage position, maintenance personnel can perform maintenance on at least a portion of the area of ​​the battery module 120 near one end of the through hole 1134 through the through hole 1134. For example, the battery management unit (BMU) 170 of the battery module 120 may be disposed at one end of the battery module 120 near the side plate 1130, and maintenance personnel can directly perform maintenance on the battery control unit 170 through the through hole 1134 of the side plate 1130 without pulling the pull-out structure 113 out of the housing 111, thereby making the maintenance of the battery pack 100 easier.

[0068] Among them, the battery pack case 110 can include a sealing plate 1135, which is arranged on the side of the side plate 1130 away from the installation cavity 1100. The sealing plate 1135 is detachably connected to the side plate 1130 and closes the through hole 1134. Therefore, by removing the sealing plate 1135 from the side plate 1130, the through hole 1134 can be opened, allowing maintenance personnel to perform maintenance on the end of the battery module 120 close to the through hole 1134 through the through hole 1134. After the maintenance is completed, the sealing plate 1135 is connected to the side plate 1130, and the through hole 1134 can be closed by the sealing plate 1135 to prevent external impurities and water vapor from entering the installation cavity 1100 through the through hole 1134.

[0069] Alternatively, the sealing plate 1135 can be movably connected to the side plate 1130, and the sealing plate 1135 can move relative to the side plate 1130 to open or close the through hole 1134. Thus, the maintenance personnel can open or close the through hole 1134 by controlling the sealing plate 1135 to move relative to the side plate 1130, which is very convenient. Among them, the sealing plate 1135 and the side plate 1130 can be rotatably connected or slidably connected, and it is sufficient to enable the sealing plate 1135 to open and close the through hole 1134, which is not limited here.

[0070] In some embodiments, Figures 1 to 3As shown, one end of the bottom plate 1131 connected to the side plate 1130 also includes a connecting portion 1133, and the connecting portion 1133 is configured to be detachably connected to the support roller 140. Therefore, when the bottom plate 1131 needs to be slid from the storage position to the pull-out position, the support roller 140 can be detachably connected to the connecting portion 1133 of the bottom plate 1131, so that during the process of the bottom plate 1131 sliding from the storage position to the pull-out position, the support roller 140 is rolled and supported on the workbench, thereby supporting the pull-out structure 113, so that the maintenance personnel can more easily control the bottom plate 1131 to slide between the storage position and the pull-out position. After the bottom plate 1131 is slid from the pull-out position to the storage position, the support roller 140 can be separated from the connecting portion 1133 so that the support roller 140 can be used again for the maintenance of other battery packs 100.

[0071] Specifically, a connection hole (not shown in the figure) can be provided on the side of the connection portion 1133 away from the side plate 1130, and the connection rod 141 of the support roller 140 can be inserted into the connection hole, so that the support roller 140 and the connection portion 1133 can be detachably connected together. The connection rod 141 and the inner surface of the connection hole can be connected by threads or fixedly connected by interference fit.

[0072] In some embodiments, the bottom plate 1131 may include a plurality of connection portions 1133 , and the plurality of connection portions 1133 are sequentially spaced and distributed along the third direction Y. When the plurality of connection portions 1133 are detachably connected to the supporting rollers 140 , the bottom plate 1131 can be supported more stably.

[0073] In some embodiments, Figures 1 to 3 As shown, the battery pack box 110 may further include a handle 150, which is provided at one end where the bottom plate 1131 is connected to the side plate 1130, so that the maintenance personnel can push or pull the bottom plate 1131 to slide relative to the support plate 1110 through the handle 150. The material of the handle 150 may be non-metal or metal.

[0074] The handle 150 may be a hidden handle. Specifically, the handle 150 is rotatably connected to the bottom plate 1131, and the handle 150 extends along the third direction Y relative to the rotation axis of the bottom plate 1131. When the maintenance personnel do not operate the handle 150, the handle 150 rotates downward to a naturally drooping state.

[0075] In addition, the number of handles 150 can be multiple. The multiple handles 150 are sequentially arranged along the third direction Y. The maintenance personnel can apply a push or pull force to the bottom plate 1131 through the multiple handles 150, so that the bottom plate 1131 is subjected to a more uniform force, which is conducive to improving the stability of the bottom plate 1131 sliding relative to the support plate 1110.

[0076] In some embodiments, Figure 2 and Figure 3 As shown, the battery pack 100 may further include an insulating sheet 160, which is disposed on the side of the battery module 120 away from the bottom plate 1131. The insulating sheet 160 can insulate the side of the battery module 120 away from the bottom plate 1131 from the box cover 1118. The insulating sheet 160 may be connected to the battery module 120 by gluing, clamping or other methods, which are not limited here.

[0077] An embodiment of the present application also provides a battery pack, which includes a battery pack case. The specific structure of the battery pack case refers to the above-mentioned embodiment. Since the battery pack adopts all the technical solutions of all the above-mentioned embodiments, it has at least all the beneficial effects brought by the technical solutions of the above-mentioned embodiments, which will not be described one by one here.

[0078] Among them, Figures 1 to 3 As shown, the battery pack 100 includes a battery pack case 110 and a battery module 120. The battery pack case 110 may be the battery pack case 110 in any of the above embodiments. The battery module 120 is disposed on a side of the bottom plate 1131 of the battery pack case 110 away from the support plate 1110. The structure of the battery module 120 may refer to the above embodiments and will not be described in detail here.

[0079] An embodiment of the present application also provides an energy storage system, which includes a battery pack. The specific structure of the battery pack refers to the above embodiment. Since the energy storage system adopts all the technical solutions of all the above embodiments, it has at least all the beneficial effects brought by the technical solutions of the above embodiments, which will not be repeated here one by one.

[0080] The energy storage system (not shown in the figure) may include a plurality of battery packs 100, and the plurality of battery packs 100 may be stacked.

[0081] The embodiments of the present application are introduced in detail above. Specific examples are used in this article to illustrate the principles and implementation methods of the present application. The description of the above embodiments is only used to help understand the method and core idea of ​​the present application. At the same time, for technical personnel in this field, according to the idea of ​​the present application, there will be changes in the specific implementation method and application scope. In summary, the content of this specification should not be understood as a limitation on the present application.

Claims

1. A battery pack box, characterized in that: include: A housing, the housing comprising a support plate and a box cover arranged along a first direction, the box cover is arranged on a side surface of the support plate, the box cover and the support plate are enclosed to form a mounting cavity, and an opening communicating with the mounting cavity is formed on one side of the box cover along a second direction, and the second direction forms an angle with the first direction; The pull-out structure comprises a bottom plate and a side plate connected to each other at an angle, wherein the bottom plate is arranged opposite to a side of the support plate facing the box cover, and a side of the bottom plate facing away from the support plate is configured to support a battery module; The side plate is located at one end of the bottom plate along the second direction, the bottom plate is slidably supported on the support plate along the second direction, and has a withdrawn position and a stored position. When the bottom plate is at the stored position, the bottom plate is located in the installation cavity, and the side plate covers the opening; When the bottom plate is in the withdrawn position, the side plate opens the opening, and the bottom plate at least partially extends out of the opening.

2. The battery pack box according to claim 1, characterized in that: The support plate is provided with a ball, and the ball rolls and abuts against a side surface of the bottom plate facing the support plate.

3. The battery pack box according to claim 1, characterized in that: The support plate is provided with two guide parts, and the two guide parts are distributed on both sides of the base plate along the third direction. The two guide parts are configured to abut against the base plate to limit the movement of the base plate in the third direction. The first direction, the second direction and the third direction are arranged at angles to each other.

4. The battery pack box according to claim 3, characterized in that: The guide portion is provided with a guide groove on one side facing the bottom plate, and the guide groove extends along the second direction. The two side edges of the bottom plate along the third direction are slidably mounted in the two guide grooves in a one-to-one correspondence.

5. The battery pack box according to claim 1, characterized in that: The battery pack case further includes a sealing member, and when the bottom plate is in the storage position, the sealing member seals the gap between the side plate and the edge of the opening.

6. The battery pack case according to claim 5, characterized in that: The sealing member is arranged on a side of the side plate facing the housing and extends along the circumference of the side plate; or, the sealing member is arranged on the box cover and extends along the edge of the opening.

7. The battery pack case according to any one of claims 1 to 6, characterized in that: The side plate is further provided with a through hole penetrating along the second direction; the battery pack box includes a sealing plate, and the sealing plate is arranged on a side of the side plate away from the installation cavity; The sealing plate is detachably connected to the side plate and closes the through hole; or, the sealing plate is movably connected to the side plate and can move relative to the side plate to open or close the through hole.

8. The battery pack case according to any one of claims 1 to 6, characterized in that: The side plate and the bottom plate are connected integrally.

9. The battery pack case according to any one of claims 1 to 6, characterized in that: The bottom plate is a liquid cooling plate.

10. The battery pack case according to any one of claims 1 to 6, characterized in that: One end of the bottom plate connected to the side plate further includes a connecting portion, and the connecting portion is configured to be detachably connected to the supporting roller.

11. The battery pack case according to any one of claims 1 to 6, characterized in that: The battery pack case further includes a fixing member configured to fix the bottom plate in the storage position to the support plate.

12. A battery pack, characterized in that: include: A battery pack case, wherein the battery pack case is the battery pack case according to any one of claims 1 to 10; The battery module is arranged on a side of the bottom plate of the battery pack box away from the support plate.

13. An energy storage system, characterized in that: The energy storage system includes the battery pack described in claim 12.

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