Energy storage device

Abstract

The utility model describes an energy storage device, a plurality of battery packs stacked in sequence, each battery pack comprises a shell and a battery module arranged in the shell, each shell comprises a side wall extending along the stacking direction of the battery packs, and an accommodating groove is formed at the joint of two adjacent side walls; and the connecting piece is accommodated in the accommodating groove, and the connecting piece is connected with the two side walls which are arranged adjacently. According to the structure, the connecting piece is contained in the containing groove and connected with the two adjacent side walls, the height of the portion, protruding out of the side walls, of the connecting piece can be reduced under the condition that connection of the connecting piece and the side walls is not affected, and therefore the height of the portion, protruding out of the side walls, of the connecting piece is improved; the connecting structure between the battery packs does not occupy too much space, and the size of the energy storage device in the horizontal direction is reduced. Therefore, the energy storage device disclosed by the utility model is compact in structure, the space utilization rate is obviously improved, and the energy storage device is more space-saving.

Description

Technical Field

[0001] The utility model relates to the technical field of energy storage batteries, in particular to an energy storage device. Background Art

[0002] With the continuous advancement of energy storage technology, energy storage devices have been widely used in many fields, effectively supporting large-scale electricity demand. However, large energy storage devices are typically composed of multiple battery cells, resulting in large size and complex structure. Therefore, how to optimize the structure of energy storage devices, reduce their size, and minimize their space utilization has become a research focus within the industry. Utility Model Content

[0003] In view of the above existing situation, the present invention provides an energy storage device to make the energy storage device more space-saving.

[0004] The present utility model provides an energy storage device, including a plurality of battery packs stacked in sequence, each of the battery packs comprising a shell and a battery module arranged in the shell, each of the shells comprising a side wall extending along the stacking direction of the plurality of battery packs, and a receiving groove being formed at the connection between two adjacent side walls along the stacking direction; a connecting member being accommodated in the receiving groove, and the connecting member connecting the two adjacent side walls arranged along the stacking direction.

[0005] Optionally, the accommodating groove passes through the side wall perpendicular to the stacking direction, and the shell further includes a limiting member, which is arranged in the accommodating groove and located at one end of the accommodating groove, and the limiting member abuts against the connecting member.

[0006] Optionally, the connecting member extends perpendicular to the stacking direction, and one end of the side wall adjacent to the other side wall is provided with a step structure facing away from the battery module, and the step structures of the two adjacent side walls form the accommodating groove.

[0007] Optionally, the connecting member extends along the stacking direction of the plurality of battery packs and connects at least two of the side walls sequentially arranged along the stacking direction.

[0008] Optionally, each side wall is provided with a receiving groove extending along the stacking direction, and the receiving grooves of multiple side walls located on the same side are interconnected, and the connecting member is arranged in the receiving grooves of multiple side walls and connected to multiple side walls.

[0009] Optionally, a surface of the connecting member facing away from the battery module is flush with a surface of the side wall facing away from the battery module.

[0010] Optionally, the top of the shell is provided with a first positioning member, and the bottom of the shell is provided with a second positioning member; the first positioning member and the second positioning member of two adjacent shells are matched with each other to limit the movement of the two adjacent shells in the horizontal direction.

[0011] Optionally, the first positioning member comprises a protrusion provided on the shell, and the second positioning member comprises a groove provided on the shell; or the first positioning member comprises a groove provided on the shell, and the second positioning member comprises a protrusion provided on the shell.

[0012] Optionally, the side of the protrusion away from the battery module is provided with a guide surface, and the surface of the guide surface is arc-shaped.

[0013] Optionally, the energy storage device further comprises a fastener, the connecting member is connected to the side wall through the fastener, and the fastener is perpendicular to the side wall.

[0014] The energy storage device relates to the technical field of energy storage devices, and relates to an energy storage device. BRIEF DESCRIPTION OF DRAWINGS

[0015] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed in the embodiment description will be briefly introduced. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor on the basis of these drawings.

[0016] In order to more completely understand the present application and its beneficial effects, the following will be described with reference to the drawings, wherein the same reference numerals in the following description represent the same parts.

[0017] Figure 1 is an exploded view of the energy storage device related by the present application.

[0018] Figure 2 is a partial exploded view of the energy storage device related by the present application.

[0019] Figure 3 It shows Figure 2 Partial schematic diagram at point A in the middle.

[0020] Figure 4 It is a schematic diagram showing the partial structure of the energy storage device involved in this application.

[0021] Figure 5 It is a partial schematic diagram showing the energy storage device involved in this application.

[0022] Figure 6 It is a partial schematic diagram showing the energy storage device involved in this application.

[0023] Figure 7 It is a schematic diagram showing the partial structure of another embodiment of the energy storage device involved in the present application.

[0024] Figure 8 It is a schematic diagram showing the partial structure of another embodiment of the energy storage device involved in the present application.

[0025] Figure numerals: 1. battery pack; 11. shell; 111. side wall; 112. first boss; 113. second boss; 114. first connecting part; 115. second connecting part; 12. accommodating groove; 13. limiter; 2. connecting part; 3. fastener; 31. bolt; 4. liquid cooling pipe; 5. manual maintenance switch; 6. base. DETAILED DESCRIPTION

[0026] Below, with reference to the accompanying drawings, the preferred embodiments of the present application are described in detail. In the following description, the same symbols are given to the same components, and repeated descriptions are omitted. In addition, the accompanying drawings are only schematic diagrams, and the ratio of the dimensions of the components to each other or the shapes of the components may be different from the actual ones. It should be noted that all directional indications in the embodiments of the present application (such as up, down, left, right, front, back...) are only used to explain the relative position relationship, movement status, etc. between the components in a certain specific posture. If the specific posture changes, the directional indication will also change accordingly.

[0027] It should also be noted that when an element is referred to as being "fixed on" or "disposed on" another element, it may be directly on the other element or there may be an intermediate element. When an element is referred to as being "connected to" another element, it may be directly connected to the other element or there may be an intermediate element.

[0028] Reference Figure 1 and Figure 2The present application provides an energy storage device, comprising a plurality of battery packs 1 and connectors 2 stacked in sequence. Each battery pack 1 includes a housing 11 and a battery module (not shown) disposed within the housing 11. Each housing 11 includes sidewalls 111 extending along the stacking direction of the battery packs 1, with a receiving groove 12 formed at the junction of two adjacent sidewalls 111 along the stacking direction. The connector 2 is received within the receiving groove 12 and connects two adjacent sidewalls 111 disposed along the stacking direction.

[0029] According to the above structure, each shell 11 includes a side wall 111 extending along the stacking direction of the battery pack 1, and a receiving groove 12 is formed at the connection between two adjacent side walls 111. The connector 2 is received in the receiving groove 12 and connects the two adjacent side walls 111. Without affecting the connection between the connector 2 and the side wall 111, the height of the connector 2 protruding from the side wall 111 can also be reduced, thereby improving the height of the connector 2 protruding from the side wall 111, so that the connection structure between the battery packs 1 does not occupy too much space, and the horizontal size of the energy storage device is reduced. As a result, the energy storage device involved in the utility model has a more compact structure, significantly improves space utilization, and makes the energy storage device more space-saving.

[0030] In some examples, the connector 2 can be completely placed in the receiving groove 12 and will not protrude from the surface of the housing 11. It can be flush with the surface of the housing or recessed in the receiving groove 12. Of course, in some examples, the connector 2 can also slightly protrude from the surface of the housing 11, but in order to minimize the external space occupied, it is best not to protrude significantly from the surface of the housing 11.

[0031] Reference Figures 1 to 4 In some embodiments, the connector 2 extends perpendicular to the stacking direction and connects two adjacent side walls 111. Exemplarily, the connector 2 can be a plate-like structure. The stacking direction can be understood as the longitudinal direction or the vertical direction, and the extension perpendicular to the stacking direction can be understood as the lateral direction or the horizontal direction of the energy storage device. Therefore, in this embodiment, the connector 2 can be set to be relatively slender and extend perpendicular to the stacking direction, so that the connector 2 can achieve a full connection of the two adjacent side walls 111 by adopting a more sophisticated structure. In some examples, during installation, the staff places the connector 2 into the receiving groove 12, and then, fasteners 3 such as bolts 31 can be used to connect the connector 2 to the two adjacent battery packs 1.

[0032] Reference Figure 6In some embodiments, the accommodation groove 12 penetrates the side wall 111 in a direction perpendicular to the stacking direction, and the shell 11 further comprises a limiting piece 13 arranged in the accommodation groove 12 and located on the inner side of the accommodation groove 12, and the limiting piece 13 abuts against the connecting piece 2. In this way, since the accommodation groove 12 penetrates the side wall 111 in a direction perpendicular to the stacking direction, the accommodation groove 12 can form two openings in a direction perpendicular to the stacking direction. Therefore, when installing the connecting piece 2, the worker can push the connecting piece 2 into the accommodation groove 12 from any opening, so as to completely place the connecting piece 2 in the accommodation groove 12. It can be understood that the accommodation groove 12 provided with the limiting piece 13 can form a structure similar to a chute, and the connecting piece 2 can be slidably pushed into the accommodation groove 12. In addition, the limiting piece 13 can also abut against the connecting piece 2, so as to limit the connecting piece 2 and avoid the limiting piece 13 from falling off, which is convenient for the worker to lock the bolt 31. Specifically, since the limiting piece 13 fixes the position of the connecting piece 2, the worker can more easily operate the bolt 31, improve the installation accuracy and efficiency, and reduce the safety risk caused by improper installation of the bolt 31.

[0033] With reference to Figure 3 In some embodiments, the connecting piece 2 extends in a direction perpendicular to the stacking direction, and the side wall 111 is provided with a stepped structure at one end adjacent to another side wall 111 and facing away from the battery module, and the stepped structures of the two adjacent side walls form an accommodation groove.

[0034] With reference to Figure 7 And Figure 8 In some embodiments, the connecting piece 2 can extend in the stacking direction of the plurality of battery packs 1 and connect at least two side walls 111 arranged in sequence in the stacking direction. Therefore, it can also be understood that the connecting piece 2 extends in the longitudinal direction, and the length of the connecting piece 2 increases, so that the connecting area with the side wall 111 increases correspondingly, and the connection is more stable. In addition, the increase of the connecting area also helps to disperse the pressure and reduce the risk of loosening caused by vibration or impact.

[0035] In some examples, the two side walls 111 arranged in the stacking direction can be connected by one or more connecting pieces 2, and when connected by a plurality of connecting pieces 2, the two adjacent connecting pieces 2 are arranged at intervals. In this way, the plurality of connecting pieces 2 can improve the stability of the connection, and the interval arrangement between the two adjacent connecting pieces 2 can reduce the number of connecting pieces 2 as much as possible while ensuring the stability of the connection, thereby reducing the cost.

[0036] With reference to Figure 7 In some embodiments, each side wall 111 is provided with an accommodation groove 12 extending in the stacking direction, and the accommodation grooves 12 of the plurality of side walls 111 located on the same side are communicated with each other, and the connecting piece 2 is arranged in the accommodation grooves 12 of the plurality of side walls 111 and connected with the plurality of side walls 111. With reference to Figure 4The energy storage device may include five stacked battery packs 1, with the accommodating grooves 12 of the five side walls 111 on the same side interconnected, and the connectors 2 are all connected to these five side walls 111. Thus, the structure can connect multiple side walls 111 with a single connector 2. Of course, to ensure connection stability, in this embodiment, there may be more than two connectors 2 on the same side to balance the stability of the battery pack 1 connection and cost control.

[0037] Reference Figure 8 In some examples, the connector 2 extends along the stacking direction of the multiple battery packs 1, and the connector 2 connects two adjacent side walls 111. As a result, the connector 2 does not need to be too long, which can save material for the connector to a certain extent. The connector 2 only needs to ensure the stability of the connection, thereby reducing manufacturing costs.

[0038] In some embodiments, the surface of the connector 2 facing away from the battery module is flush with the surface of the sidewall 111 facing away from the battery module. In other words, the connector 2 does not protrude from the housing 11 and is flush with the surface of the housing 11. This minimizes uneven structures on the surface of the housing 11, making it more regular and flat, preventing dust accumulation and making the housing 11 look neater and more aesthetically pleasing. Furthermore, the risk of collision or damage caused by the protrusion of the connector 2 is reduced.

[0039] Reference Figure 1 In some examples, the energy storage device further includes a base 6, on top of which are multiple battery packs 1 stacked in sequence. The base 6 may also be provided with a slot and connected to a battery pack 1 above via a connector 2.

[0040] In some embodiments, the top of the shell 11 is provided with a first positioning member, and the bottom of the shell 11 is provided with a second positioning member; the first positioning member of one shell 11 and the second positioning member of an adjacent shell 11 are matched with each other to limit the movement of the two adjacent shells 11 in the horizontal direction. In this way, when stacking a plurality of battery packs 1, the first positioning member and the second positioning member of the two adjacent shells 11 are matched with each other to prevent the relative movement of the shells 11 in the horizontal direction, so as to facilitate the continued stacking of the battery packs 1, and the whole operation process is safer and more efficient. Specifically, after the worker stacks a plurality of battery packs 1, the battery is not easy to move in the horizontal direction under the cooperation of the first positioning member and the second positioning member, which reduces the safety risk that may be caused by the displacement of the battery pack 1, and then the worker connects the connecting member 2 with the two adjacent battery packs 1. In addition, the arrangement of the first positioning member and the second positioning member also reduces the time for alignment when stacking the battery packs 1, and improves the work efficiency. It can be understood that if the first positioning member and the second positioning member are not arranged, the worker needs to move and align the two battery packs 1 after stacking them, so as to place them in the most suitable position, which facilitates the subsequent connection of the connecting member 2, and the whole installation process is time-consuming and laborious.

[0041] In some embodiments, the first positioning member includes a protrusion provided on the shell 11, and the second positioning member includes a groove provided on the shell 11. In other embodiments, the first positioning member includes a groove provided on the shell 11, and the second positioning member includes a protrusion provided on the shell 11. In this way, when stacking the battery packs 1, the protrusion of one shell 11 is placed in the groove of another shell 11, so as to limit the movement of the two adjacent shells 11 in the horizontal direction.

[0042] In some embodiments, the side of the protrusion away from the battery module is provided with a guide surface, and the surface of the guide surface is arc-shaped. In this way, when the protrusion is placed in the groove, the guide surface with the arc-shaped surface has self-alignment, that is, when the protrusion and the groove are not completely aligned, the guide surface will automatically adjust to the correct position, reducing the time for adjustment when stacking.

[0043] In some examples, the protrusion can also be hemispherical.

[0044] In some embodiments, the energy storage device further includes a fastener 3, and the connector 2 is connected to the side wall 111 via the fastener 3, and the fastener 3 is perpendicular to the side wall 111. Specifically, in some examples, the fastener 3 can be a bolt 31, and the bolt 31 is perpendicular to the side wall 111. The connector 2 and the side wall 111 are both provided with screw holes that are screwed to the bolt 31. Therefore, in the related art, the weight of some energy storage devices can reach four tons, and the connection using bolts 31 has a higher connection strength, which can ensure the structural stability of the entire energy storage device and improve safety performance. In addition, the connection using bolts 31 can facilitate the disassembly of the battery pack 1, which is convenient for later maintenance and replacement.

[0045] Reference Figure 4 The battery pack 1 also features a manual maintenance switch 5 (MSD), a key safety component in the electric vehicle battery pack 1. When the battery pack 1 requires maintenance or inspection, it allows maintenance personnel to safely disconnect the high-voltage connection between the battery pack 1 and the rest of the vehicle. This protects maintenance personnel from electric shock and reduces the risk of fire during battery pack 1 maintenance. For ease of connection, the manual maintenance switch 5 is typically positioned protruding from the housing 11.

[0046] Reference Figure 4 In some examples, the housing 11 further includes a first boss 112 and a second boss 113 located on the same side as the manual maintenance switch 5. The first boss 112 is located near the top of the battery pack 1, and the second boss 113 is located near the bottom of the battery pack 1. Both the first boss 112 and the second boss 113 project in the same direction as the manual maintenance switch 5. The first boss 112 and the second boss 113 of two adjacent battery packs 1 are connected by a bolt 31, which is perpendicular to the top of the battery pack 1. Thus, the manual maintenance switch 5 is positioned protrudingly, and the first and second bosses 112, 113 fully utilize the space around the manual maintenance switch 5. Within this limited space, the provision of the first and second bosses 112, 113 strengthens the connection between the two battery packs 1. In this example, in addition to being connected via the connector 2, the two adjacent battery packs 1 can also be connected via the first and second bosses 112, 113, resulting in a more stable and reliable connection.

[0047] In some examples, the energy storage device also includes a liquid cooling pipe 4, and the housing 11 is further provided with a protruding liquid cooling pipe interface connected to the liquid cooling pipe 4. The housing 11 may also include a first connecting portion 114 and a second connecting portion 115 located on the same side as the liquid cooling pipe interface. The first connecting portion 114 is located near the top of the battery pack 1, and the second connecting portion 115 is located near the bottom of the battery pack 1. The first connecting portion 114 and the second connecting portion 115 both protrude in the same direction as the liquid cooling pipe interface. The first connecting portion 114 and the second connecting portion 115 of two adjacent battery packs 1 are connected by bolts 31, and the bolts 31 are perpendicular to the top of the battery pack 1. As a result, the liquid cooling pipe interface is provided in a protruding manner, and the first connecting portion 114 and the second connecting portion 115 fully utilize the space around the liquid cooling pipe interface. In a limited space, the provision of the first connecting portion 114 and the second connecting portion 115 strengthens the connection between the two battery packs 1. In this example, in addition to being connected by the connector 2, the two adjacent battery packs 1 can also be connected by the first connecting portion 114 and the second connecting portion 115, making the connection more stable and reliable.

[0048] In summary, each shell 11 of the energy storage device involved in the present application includes a side wall 111 extending along the stacking direction of the battery pack 1, and a receiving groove 12 is formed at the connection between the two adjacent side walls 111. The connector 2 is received in the receiving groove 12 and connects the two adjacent side walls 111. Without affecting the connection between the connector 2 and the side wall 111, the height of the connector 2 protruding from the side wall 111 can also be reduced, thereby improving the height of the connector 2 protruding from the side wall 111, so that the connection structure between the battery packs 1 does not take up too much space, and further reduces the size of the energy storage device in the horizontal direction. As a result, the energy storage device involved in the present application has a more compact structure, significantly improves space utilization, and makes the energy storage device more space-saving.

[0049] In the description of this application, the terms "first" and "second" are used for descriptive purposes only and should not be understood to indicate or imply relative importance or implicitly specify the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more features. In the description of this application, "plurality" means two or more, unless otherwise specifically defined.

[0050] In the above embodiments, the description of each embodiment has its own focus. For parts that are not described in detail in a certain embodiment, reference can be made to the relevant descriptions of other embodiments.

[0051] The embodiments, implementation methods and related technical features of the present application can be combined and replaced with each other without conflict.

[0052] The above are merely preferred embodiments of the present application and do not constitute any form of limitation to the present application. However, any simple modifications, equivalent changes, and modifications made to the above embodiments based on the technical essence of the present application without departing from the content of the technical solution of the present application are still within the scope of the technical solution of the present application.

[0053] Although the present invention has been described in detail above with reference to the accompanying drawings and embodiments, it should be understood that the above description does not limit the present invention in any form. Those skilled in the art may modify and alter the present invention as needed without departing from the spirit and scope of the present invention, and such modifications and alterations are intended to fall within the scope of the present invention.

Claims

1. An energy storage device, characterized in that: include: A plurality of battery packs stacked in sequence, each battery pack comprising a housing and a battery module disposed within the housing, each housing comprising a side wall extending along a stacking direction of the battery packs, and a receiving groove formed at a connection between two adjacent side walls along the stacking direction; A connecting member is accommodated in the accommodating groove, and the connecting member connects two side walls adjacently arranged along the stacking direction.

2. The energy storage device according to claim 1, characterized in that The accommodating groove passes through the side wall in a direction perpendicular to the stacking direction. The shell further includes a limiting member, which is arranged in the accommodating groove and located at one end of the accommodating groove. The limiting member abuts against the connecting member.

3. The energy storage device according to claim 1, characterized in that The connecting member extends perpendicular to the stacking direction, and one end of the side wall adjacent to the other side wall is provided with a step structure facing away from the battery module, and the step structures of the two adjacent side walls form the accommodating groove.

4. The energy storage device according to claim 1, characterized in that The connecting member extends along a plurality of the stacking directions and connects at least two of the side walls sequentially arranged along the stacking direction.

5. The energy storage device according to claim 4, characterized in that Each of the side walls is provided with a receiving groove extending along the stacking direction, and the receiving grooves of the multiple side walls located on the same side are interconnected. The connecting member is provided in the receiving grooves of the multiple side walls and connected to the multiple side walls.

6. The energy storage device according to any one of claims 1 to 5, characterized in that: A surface of the connecting member facing away from the battery module is flush with a surface of the side wall facing away from the battery module.

7. The energy storage device according to any one of claims 1 to 5, characterized in that: A first positioning member is provided on the top of the shell, and a second positioning member is provided on the bottom of the shell; The first positioning members and the second positioning members of the two adjacent shells cooperate with each other to limit the movement of the two adjacent shells in the horizontal direction.

8. The energy storage device according to claim 7, characterized in that The first positioning member includes a protrusion protruding from the housing, and the second positioning member includes a groove formed in the housing; or, The first positioning member includes a groove formed in the housing, and the second positioning member includes a protrusion formed on the housing.

9. The energy storage device according to claim 8, characterized in that A guiding surface is provided on a side of the convex portion facing away from the battery module, and a surface of the guiding surface is arc-shaped.

10. The energy storage device according to any one of claims 1 to 5, characterized in that: The energy storage device further includes a fastener, through which the connecting member is connected to the side wall, and the fastener is perpendicular to the side wall.

Images