Modular battery pack structure for energy storage system

Abstract

The invention relates to the technical field of battery packs, in particular to a modular battery pack structure for an energy storage system. The battery module is arranged on the cabinet body; the switching mechanism is rotationally arranged on the cabinet body, and a butt joint plate is arranged on the switching mechanism; the first pole group comprises a first connecting bar and a first butt joint bar which are arranged on the cabinet body, and further comprises a first side bar connected with the first connecting bar; the second pole group comprises a second connecting bar and a second butt-joint bar which are arranged on the cabinet body, and further comprises a second side bar connected with the second butt-joint bar; according to the invention, the switching mechanism is controlled to rotate so as to change the connection part of the butt joint plate, rapid switching of series-parallel connection between the battery modules can be realized, and the series-parallel connection state of the battery modules can be judged according to the orientation of the butt joint plate on the switching mechanism.

Description

Technical Field

[0001] The present invention relates to the technical field of battery packs, and particularly to a modular battery pack structure for an energy storage system. Background Art

[0002] Since energy storage systems require different voltage and capacity configurations, when using modular batteries, it is generally necessary to connect the energy storage batteries in series or in parallel. In the face of high-voltage scenarios, modular batteries are generally connected in series, and in the face of low-voltage and high-capacity scenarios, modular batteries are generally connected in parallel.

[0003] Currently, the series and parallel connections between modular batteries are generally determined by the connection of circuits. When disassembling and assembling modular batteries, workers need to connect the series or parallel circuits according to the circuit diagram. Firstly, the connection efficiency is not high, and secondly, it is easy to make mistakes in circuit connection. Moreover, when switching between series and parallel according to the usage requirements, a large number of circuits need to be changed, causing inconvenience in use.

[0004] Therefore, the present invention proposes a modular battery pack structure for an energy storage system. Summary of the Invention

[0005] In view of the problem in the above or the prior art that a large number of circuits need to be changed when switching between series and parallel, the present invention is proposed.

[0006] Therefore, the object of the present invention is to provide a modular battery pack structure for an energy storage system.

[0007] To solve the above technical problems, the present invention provides the following technical solution: A modular battery pack structure for an energy storage system, comprising: a cabinet; battery modules, which are arranged on the cabinet; a switching mechanism, which is rotatably arranged on the cabinet, and a docking plate is arranged on the switching mechanism; a first pole group, which includes a first connection row and a first docking row arranged on the cabinet, and further includes a first side row connected to the first connection row; a second pole group, which includes a second connection row and a second docking row arranged on the cabinet, and further includes a second side row connected to the second docking row; a connecting cross row, which is arranged on the cabinet; in the first state, the docking plates of the same polarity electrically connect the first connection row and the first docking row, or electrically connect the second connection row and the second docking row, and the battery modules are in a parallel connection state; in the second state, the docking plates of different polarities on two adjacent switching mechanisms are connected to the same connecting cross row, and the battery modules are in a series connection state.

[0008] As a preferred embodiment of the modular battery pack structure for an energy storage system according to the present invention, wherein: the switching mechanism includes a rotating sleeve rotatably disposed on the cabinet, and an arc-shaped pole piece disposed on the rotating sleeve, and the docking plate is disposed on the arc-shaped pole piece; electrode posts are provided on the battery module; there are two arc-shaped pole pieces and electrode posts, and the arc-shaped pole pieces and the electrode posts are electrically connected.

[0009] As a preferred embodiment of the modular battery pack structure for an energy storage system according to the present invention, wherein: an outer arc groove and an access groove are provided on the rotating sleeve, and a sliding groove is provided inside the rotating sleeve; the arc-shaped pole piece is disposed in the sliding groove.

[0010] As a preferred embodiment of the modular battery pack structure for an energy storage system according to the present invention, wherein: a first spring is provided on the arc-shaped pole piece, and a conductive plate is provided on the first spring; the conductive plate and the arc-shaped pole piece are electrically connected; the conductive plate is slidably disposed in the sliding groove.

[0011] As a preferred embodiment of the modular battery pack structure for an energy storage system according to the present invention, wherein: the electrode post includes a thin pole post disposed on the battery module, and a thick pole post disposed on the thin pole post; the thick pole post is slidably connected to the conductive plate.

[0012] As a preferred embodiment of the modular battery pack structure for an energy storage system according to the present invention, wherein: a connecting member is further included; the connecting member is used to connect the first pole group, the second pole group, and the connecting horizontal row to the cabinet.

[0013] As a preferred embodiment of the modular battery pack structure for an energy storage system according to the present invention, wherein: the connecting member includes a fixing post, and a cushion sleeve disposed on the fixing post, and two second springs symmetrically arranged are provided on the fixing post.

[0014] As a preferred embodiment of the modular battery pack structure for an energy storage system according to the present invention, wherein: the first connecting row, the first docking row, the first side row, the second connecting row, the second docking row, the second side row, and the connecting horizontal row are all symmetrically disposed at both ends of the cushion sleeve.

[0015] As a preferred embodiment of the modular battery pack structure for an energy storage system according to the present invention, wherein: the included angle of the outer arc groove is ninety degrees, and the access groove is disposed in the middle of the outer arc groove.

[0016] As a preferred embodiment of the modular battery pack structure for an energy storage system according to the present invention, wherein: there are two outer arc grooves, and the two outer arc grooves are concentrically arranged; the radii of the two outer arc grooves are different.

[0017] Advantages of the modular battery pack structure for energy storage systems of the present invention: By controlling the rotation of the switching mechanism to change the connection part of the docking plate, the series-parallel switching between battery modules can be achieved quickly. When installing the battery modules, it is only necessary to place the battery modules in the cabinet according to the corresponding orientation, which is simple to install, reduces the operation difficulty, and the series-parallel state of the battery modules can be judged according to the orientation of the docking plate on the switching mechanism. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for the description of the embodiments will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the present invention, and those of ordinary skill in the art can also obtain other drawings based on these drawings without creative efforts.

[0019] Figure 1 It is a schematic diagram of the overall structure of the modular battery pack structure for energy storage systems.

[0020] Figure 2 It is a schematic diagram of the sectional structure of the modular battery pack structure for energy storage systems.

[0021] Figure 3 It is a schematic diagram of the back structure of the modular battery pack structure for energy storage systems.

[0022] Figure 4 For Figure 3 The enlarged view at A in

[0023] Figure 5 It is an exploded schematic diagram of the switching mechanism of the modular battery pack structure for energy storage systems.

[0024] Figure 6 It is a schematic diagram of the connection structure between the sliding groove and the thick pole column of the modular battery pack structure for energy storage systems.

[0025] Figure 7 It is a schematic diagram of the connection structure between the rotating sleeve and the outer arc groove of the modular battery pack structure for energy storage systems.

[0026] Figure 8 It is a schematic diagram of the sectional structure of the switching mechanism of the modular battery pack structure for energy storage systems.

[0027] Figure 9 It is a reference diagram when the docking plates of the modular battery pack structure for energy storage systems are not connected to the first pole group and the second pole group.

[0028] Figure 10 It is a reference diagram of the first state of the modular battery pack structure for energy storage systems.

[0029] Figure 11 It is a second state reference diagram of a modular battery pack structure for an energy storage system.

[0030] In the figure: 1, cabinet body; 2, battery module; 21, electrode post; 211, thin electrode post; 212, thick electrode post; 3, switching mechanism; 31, rotating sleeve; 311, outer arc groove; 312, entry groove; 313, sliding groove; 314, turning handle; 32, arc-shaped electrode plate; 321, docking plate; 33, first spring; 34, conductive plate; 4, connecting piece; 41, fixing post; 42, cushion sleeve; 43, second spring; 5, first pole group; 51, first connection row; 52, first docking row; 53, first side row; 6, second pole group; 61, second connection row; 62, second docking row; 63, second side row; 7, connecting cross row. Detailed implementation manners

[0031] To make the above objects, features and advantages of the present invention more obvious and understandable, the following detailed description of the specific implementation manners of the present invention will be made in conjunction with the accompanying drawings of the specification.

[0032] In the following description, many specific details are set forth to fully understand the present invention. However, the present invention can also be implemented in other ways different from those described herein. Those skilled in the art can make similar extensions without departing from the connotation of the present invention. Therefore, the present invention is not limited by the specific embodiments disclosed below.

[0033] Secondly, the so-called "one embodiment" or "embodiment" herein refers to a specific feature, structure or characteristic that can be included in at least one implementation manner of the present invention. The "in one embodiment" that appears in different places in this specification does not all refer to the same embodiment, nor is it a separate or selectively mutually exclusive embodiment with other embodiments.

[0034] Embodiment 1, referring to Figures 1 to 11 , which is the first embodiment of the present invention. This embodiment provides a modular battery pack structure for an energy storage system, including a cabinet body 1; several storage spaces separated by partitions are provided inside the cabinet body 1; a battery module 2, which is arranged on the cabinet body 1; the battery module 2 is stored in the storage space inside the cabinet body 1.

[0035] A switching mechanism 3, which is rotatably arranged on the cabinet body 1, and a docking plate 321 is arranged on the switching mechanism 3; there are two docking plates 321, which are arranged in an array on the switching mechanism 3, and the two docking plates 321 are respectively connected to the positive and negative electrodes of the battery module 2.

[0036] A first pole group 5, which includes a first connection row 51 and a first docking row 52 arranged on the cabinet body 1, and also includes a first side row 53 connected to the first connection row 51; referring to Figure 9, the first connection row 51 and the first docking row 52 are arranged on the same straight line, and the first connection row 51 and the first docking row 52 are arranged in a disconnected manner. There are several first docking rows 52, and they are arranged in a linear array. The adjacent first docking rows 52 are all arranged in a disconnected manner. The first side row 53 is perpendicular to the first connection row 51, and the first side row 53 is electrically connected to the first connection row 51.

[0037] The second pole group 6, which includes a second connection row 61 and a second docking row 62 arranged on the cabinet 1, and also includes a second side row 63 connected to the second docking row 62; Refer to Figure 9 , the second connection row 61 and the second docking row 62 are arranged on the same straight line, and the second connection row 61 and the second docking row 62 are arranged in a disconnected manner. There are several second docking rows 62, and they are arranged in a linear array. The adjacent second docking rows 62 are all arranged in a disconnected manner. The second side row 63 is perpendicular to the second connection row 61, and the second side row 63 is electrically connected to the second connection row 61.

[0038] It should be noted that the first pole group 5 and the second pole group 6 are respectively used to connect the positive and negative electrodes of the battery module 2.

[0039] The connecting horizontal row 7, which is arranged on the cabinet 1, Refer to Figure 9 , there are several connecting horizontal rows 7 arranged from bottom to top.

[0040] During use, the battery module 2 is arranged in the cabinet 1, and the electrodes of the battery module 2 and the docking plate 321 are in an electrically connected state. Refer to Figure 9 , when the docking plate 321 is not in contact with the first pole group 5, the second pole group 6, and the connecting horizontal row 7, at this time, all the battery modules 2 are not connected in series or parallel.

[0041] In the first state, the docking plates 321 of the same polarity electrically connect between the first connection row 51 and the first docking row 52, or electrically connect between the second connection row 61 and the second docking row 62. In this state, the battery modules 2 are in a parallel connection state.

[0042] In the second state, the docking plates 321 of different polarities on two adjacent switching mechanisms 3 are connected to the same connecting horizontal row 7. In this state, the battery modules 2 are in a series connection state.

[0043] The rotary switching mechanism 3 can switch between the first state and the second state.

[0044] Refer to Figure 10, this state is the first state, all the battery modules 2 are in a parallel connection state, the positive electrode docking plate 321 on the bottom switching mechanism 3 connects the first connecting row 51 and the first docking row 52, ​​and the first docking rows 52 are also connected through the positive electrode docking plate 321 on the switching mechanism 3. At this time, the first electrode group 5 constitutes the positive electrode; the negative electrode docking plate 321 on the top switching mechanism 3 connects the second connecting row 61 and the second docking row 62, and the second docking rows 62 are also connected through the negative electrode docking plate 321 on the switching mechanism 3. At this time, the second electrode group 6 constitutes the negative electrode.

[0045] Reference Figure 11 This state is the second state, all battery modules 2 are in a series connection state, the positive electrode docking plate 321 on the bottom switching mechanism 3 is connected to the first side row 53, the negative electrode docking plate 321 on the top switching mechanism 3 is connected to the second side row 63, and the positive and negative electrode docking plates 321 on two adjacent switching mechanisms 3 are connected through the connecting horizontal row 7. At this time, the first pole group 5 serves as the positive pole and the second pole group 6 serves as the negative pole.

[0046] It should be noted that the docking plate 321 has an L-shaped structure, which can increase the connection cross-section and improve the stability during the power supply process.

[0047] In summary, by controlling the rotation of the switching mechanism 3 to change the connection position of the docking plate 321, the switching between the series and parallel connections of the battery modules 2 can be realized, and when installing the battery module 2, it is only necessary to place the battery module 2 in the cabinet 1 according to the corresponding orientation, which is simple to install and reduces the difficulty of operation. The series and parallel state of the battery module 2 can be determined according to the orientation of the docking plate 321 on the switching mechanism 3, and the number of series or parallel connections of the battery modules 2 can be adjusted according to the needs of use. When the number of series and parallel connections needs to be reduced, it is only necessary to rotate the docking plates 321 on part of the switching mechanism 3 to the direction as shown in the figure. Figure 9 The tilted state can be achieved.

[0048] Example 2, reference Figures 1 to 11 , which is the second embodiment of the present invention. Different from the previous embodiment, the switching mechanism 3 includes a rotating sleeve 31 rotatably arranged on the cabinet 1, and an arc-shaped pole piece 32 arranged on the rotating sleeve 31, and a docking plate 321 is arranged on the arc-shaped pole piece 32; the rotating sleeve 31 can rotate on the back of the cabinet 1, the arc-shaped pole piece 32 is arranged inside the rotating sleeve 31, and the docking plate 321 is arranged through the rotating sleeve 31.

[0049] The battery module 2 is provided with an electrode column 21 ; there are two arc-shaped pole pieces 32 and two electrode columns 21 , and the arc-shaped pole pieces 32 and the electrode columns 21 are electrically connected, and the two electrode columns 21 on the battery module 2 correspond to the positive and negative poles of the battery module 2 respectively.

[0050] Specifically, an outer arc groove 311 and an entry groove 312 are provided on the rotating sleeve 31, and a sliding groove 313 is provided inside the rotating sleeve 31; the outer arc groove 311 and the sliding groove 313 have the same cross angle, and the size of the sliding groove 313 is larger than that of the outer arc groove 311.

[0051] The arc-shaped pole piece 32 is arranged in the sliding groove 313.

[0052] Furthermore, a first spring 33 is provided on the arc-shaped pole piece 32, and a conductive plate 34 is provided on the first spring 33; a plurality of first springs 33 are provided on the arc-shaped pole piece 32, and the elastic force of the first spring 33 enables the conductive plate 34 to have a tendency to move away from the arc-shaped pole piece 32, and the conductive plate 34 and the arc-shaped pole piece 32 are electrically connected; the conductive plate 34 and the arc-shaped pole piece 32 can be connected by a wire.

[0053] The conductive plate 34 is slidably arranged in the sliding groove 313, and the contour size of the conductive plate 34 fits the sliding groove 313.

[0054] The electrode post 21 includes a thin pole post 211 provided on the battery module 2 and a thick pole post 212 provided on the thin pole post 211; the diameter of the thin pole post 211 is the same as the width of the outer arc groove 311, and the diameter of the thick pole post 212 is the same as the diameter of the entry groove 312.

[0055] The thick pole post 212 is slidably connected to the conductive plate 34, and power transmission can be achieved by the thick pole post 212 being attached to the conductive plate 34.

[0056] A turning handle 314 is provided on the rotating sleeve 31, and the setting of the turning handle 314 facilitates the operator to rotate the rotating sleeve 31.

[0057] During use, first rotate the switching mechanism 3 to the Figure 9 orientation, the docking plate 321 is in an inclined state, and the docking plate 321 does not connect the first pole group 5, the second pole group 6 and the connecting horizontal row 7 to ensure that the circuit is not connected. At this time, the electrode post 21 is in a state aligned with the entry groove 312. The operator pushes the battery module 2 to insert it into the cabinet body 1. The thick pole post 212 enters the sliding groove 313 through the entry groove 312 and presses the conductive plate 34, causing the first spring 33 to compress. When the thick pole post 212 completely enters the sliding groove 313, by rotating the rotating sleeve 31, the thin pole post 211 slides in the outer arc groove 311, and the thick pole post 212 slides in the sliding groove 313 and is misaligned with the entry groove 312. At this time, the installation of the battery module 2 can be completed, and the battery module 2 is fixed by the switching mechanism 3. Due to the existence of the elastic force of the first spring 33, the conductive plate 34 can be pushed to always fit on the end face of the thick pole post 212 to ensure the connection of the circuit. By controlling the rotation direction of the rotating sleeve 31, the series-parallel state of the battery module 2 can be selected.

[0058] Preferably, the included angle of the outer arc groove 311 is ninety degrees, the inlet groove 312 is arranged in the middle of the outer arc groove 311, the outer arc groove 311 can limit the rotation angle of the rotating sleeve 31 outside the electrode post 21, and when the inlet groove 312 is arranged in the middle of the outer arc groove 311, the rotating sleeve 31 can rotate clockwise and counterclockwise by forty-five degrees to change the connection position of the docking plate 321. And when the thick electrode post 212 is aligned with the inlet groove 312, the docking plate 321 does not connect the first pole group 5 and the second pole group 6, which facilitates the disassembly and replacement of the battery module 2.

[0059] Preferably, there are two outer arc grooves 311, and the two outer arc grooves 311 are concentrically arranged; the radii of the two outer arc grooves 311 are different. Due to the different radii of the two outer arc grooves 311, when the electrode post 21 is installed, it can only be slidably connected to the outer arc groove 311 with the corresponding radius. Therefore, it can be used as an anti-misinsertion setting to avoid inserting in the wrong direction when inserting the battery module 2, reducing the requirement for the operator's ability.

[0060] The rest of the structure is the same as that of Embodiment 1.

[0061] Embodiment 3, referring to Figures 1 to 11 , is the third embodiment of the present invention. Different from the previous embodiment, it further includes a connecting member 4; the connecting member 4 is used to connect the first pole group 5, the second pole group 6, and the connecting horizontal row 7 to the cabinet 1.

[0062] Specifically, the connecting member 4 includes a fixing post 41 and a cushion sleeve 42 arranged on the fixing post 41. There are two symmetrically arranged second springs 43 on the fixing post 41, and the cushion sleeve 42 is slidably arranged outside the fixing post 41.

[0063] Furthermore, the first connecting row 51, the first docking row 52, the first side row 53, the second connecting row 61, the second docking row 62, the second side row 63, and the connecting horizontal row 7 are all symmetrically arranged at both ends of the cushion sleeve 42.

[0064] Referring to Figure 3 and Figure 4 , the first connecting row 51, the first docking row 52, the first side row 53, the second connecting row 61, the second docking row 62, the second side row 63, and the connecting horizontal row 7 are all of double-layer structure, and the two layers are separated by the cushion sleeve 42 as a support, so that an insertion gap is generated between the double-layer structures. The elastic force generated by the symmetrically arranged second springs 43 can push the double-layer structures to keep the insertion gap between them in the smallest state. It should be noted that the sides of the first connecting row 51, the first docking row 52, the first side row 53, the second connecting row 61, the second docking row 62, the second side row 63, and the connecting horizontal row 7 are all provided with chamfers.

[0065] The rest of the structure is the same as that of Embodiment 2.

[0066] During use, when the docking plate 321 is inserted into the insertion gap between the double-layer structures of the first connection row 51, the first docking row 52, the first side row 53, the second connection row 61, the second docking row 62, the second side row 63, and the connecting cross row 7, a thrust will be generated during the insertion process of the docking plate 321 to make the double-layer structures move away from each other. Under the elastic force of the second spring 43, the double-layer structures are pushed to fit on the surface of the docking plate 321, ensuring the connection effect of the circuit and at the same time playing a fixing effect on the rotating sleeve 31 to keep the rotating sleeve 31 at a certain angle.

[0067] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and not to limit them. Although the present invention has been described in detail with reference to the preferred embodiments, those of ordinary skill in the art should understand that the technical solutions of the present invention can be modified or equivalently replaced without departing from the spirit and scope of the technical solutions of the present invention, and they should all be covered by the scope of the claims of the present invention.

Claims

1. A modular battery pack structure for an energy storage system, characterized in that: Comprising, Cabinet body (1); Battery module (2), which is arranged on the cabinet body (1); Switching mechanism (3), which is rotatably arranged on the cabinet body (1), and a docking plate (321) is arranged on the switching mechanism (3); First pole group (5), which includes a first connection row (51) and a first docking row (52) arranged on the cabinet body (1), and also includes a first side row (53) connected to the first connection row (51); Second pole group (6), which includes a second connection row (61) and a second docking row (62) arranged on the cabinet body (1), and also includes a second side row (63) connected to the second docking row (62); Connecting horizontal row (7), which is arranged on the cabinet body (1); In the first state, the docking plates (321) of the same polarity electrically connect the first connection row (51) and the first docking row (52), or electrically connect the second connection row (61) and the second docking row (62), and the battery module (2) is in a parallel connection state; In the second state, the docking plates (321) of different polarities on two adjacent switching mechanisms (3) are connected to the same connecting horizontal row (7), and the battery module (2) is in a series connection state.

2. The modular battery pack structure for an energy storage system according to claim 1, wherein: The switching mechanism (3) includes a rotating sleeve (31) rotatably arranged on the cabinet body (1), and an arc-shaped pole piece (32) arranged on the rotating sleeve (31), and the docking plate (321) is arranged on the arc-shaped pole piece (32); An electrode post (21) is arranged on the battery module (2); There are two arc-shaped pole pieces (32) and two electrode posts (21), and the arc-shaped pole piece (32) and the electrode post (21) are electrically connected.

3. The modular battery pack structure for an energy storage system according to claim 2, characterized in that: An outer arc groove (311) and an access groove (312) are arranged on the rotating sleeve (31), and a sliding groove (313) is arranged inside the rotating sleeve (31); The arc-shaped pole piece (32) is arranged in the sliding groove (313).

4. The modular battery pack structure for an energy storage system according to claim 3, characterized in that: A first spring (33) is arranged on the arc-shaped pole piece (32), and a conductive plate (34) is arranged on the first spring (33); The conductive plate (34) is electrically connected to the arc-shaped pole piece (32); The conductive plate (34) slides in the sliding groove (313).

5. The modular battery pack structure for an energy storage system according to claim 4, characterized in that: The electrode post (21) includes a thin pole post (211) arranged on the battery module (2), and a thick pole post (212) arranged on the thin pole post (211); The thick pole post (212) is slidably connected to the conductive plate (34).

6. The modular battery pack structure for an energy storage system according to any one of claims 1 to 5, characterized in that: It also includes a connecting member (4); The connecting member (4) is used to connect the first pole group (5), the second pole group (6), and the connecting horizontal row (7) to the cabinet body (1).

7. The modular battery pack structure for an energy storage system according to claim 6, characterized in that: The connecting member (4) includes a fixing post (41), and a cushion sleeve (42) arranged on the fixing post (41), and two second springs (43) symmetrically arranged are arranged on the fixing post (41).

8. The modular battery pack structure for an energy storage system according to claim 7, wherein: The first connection row (51), the first docking row (52), the first side row (53), the second connection row (61), the second docking row (62), the second side row (63), and the connecting horizontal row (7) are all symmetrically arranged at both ends of the cushion sleeve (42).

9. The modular battery pack structure for an energy storage system according to any one of claims 3 to 5, characterized in that: The included angle of the outer arc groove (311) is ninety degrees, and the entry groove (312) is arranged in the middle of the outer arc groove (311).

10. The modular battery pack structure for an energy storage system according to claim 9, characterized in that: There are two outer arc grooves (311), and the two outer arc grooves (311) are concentrically arranged; The radii of the two outer arc grooves (311) are different.

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