Control assembly, battery box, and energy storage device

Abstract

A control assembly, a battery box, and an energy storage device. The control assembly comprises a first base and a first control component, wherein the first base is detachably mounted on a box body of the battery box; the first control component is provided on the first base; part of the first control component is configured to be electrically connected to a battery assembly in the battery box; part of the first control component is configured to be electrically connected to the first control component of another battery box; and the first control component is at least used for switching the series connection or parallel connection of the battery assemblies in at least two battery boxes. The battery box comprises the control assembly, a box body, and a battery assembly. The energy storage device comprises a plurality of battery boxes.

Description

Control assembly, battery box and energy storage device

[0001] Cross-reference to Related Applications

[0002] The present disclosure claims priority to the Chinese patent application No. 202410875029.8, filed on June 28, 2024, and entitled “Control module, battery box and energy storage device”, the entire content of which is incorporated herein by reference. TECHNICAL FIELD

[0003] The present disclosure relates to the field of energy storage devices, in particular, to a control assembly, a battery box and an energy storage device. BACKGROUND

[0004] In the related art, an energy storage device generally includes a plurality of battery boxes, and the control lines between the plurality of battery boxes are difficult to disassemble, repair and maintain. SUMMARY

[0005] The purpose of the present disclosure is to provide a control assembly, a battery box and an energy storage device, thereby facilitating the disassembly and maintenance of the battery box, to at least partially solve the above technical problems.

[0006] To achieve the above purpose, according to a first aspect of the present disclosure, a control assembly is provided, comprising: a first base body for being detachably mounted on a box body of a battery box; and a first control component arranged on the first base body, the first control component being partially used for electrically connecting battery assemblies in the battery box, and the first control component being partially used for electrically connecting with the first control component of another battery box, the first control component being at least used for switching series connection or parallel connection of the battery assemblies in at least two battery boxes.

[0007] Optionally, the control assembly further comprises a connecting piece arranged on the first base body, the first base body being connected to the box body through the connecting piece and being connected to the first base body of another battery box through the connecting piece, so that two adjacent battery boxes are connected through two adjacent control assemblies.

[0008] Optionally, the connecting piece comprises a first plug-in part, a second plug-in part and a third plug-in part, the first control component being electrically connected with the battery assemblies in the battery box through the first plug-in part, the first control component being electrically connected with the third plug-in part of the control assembly of another battery box through the second plug-in part, and the first control component being electrically connected with the second plug-in part of the control assembly of another battery box through the third plug-in part, so that two first control components of two adjacent battery boxes are electrically connected.

[0009] Optionally, the first plug-in part is configured as a first plug, and the second plug-in part is configured as one of a second plug and a second slot, and the third plug-in part is configured as the other of the second plug and the second slot.

[0010] Optionally, the connecting member comprises a first connecting block and a second connecting block, the first connecting block and the second connecting block are respectively located on opposite sides of the first base body, the second plug is arranged on the first connecting block, the second slot is arranged on the second connecting block, and the first plug-in part is arranged on the first connecting block or the second connecting block.

[0011] Optionally, the first base body comprises a receiving groove, the first control component is arranged in the receiving groove, the first base body has opposite first and second walls located on two sides of the receiving groove, the first connecting block is arranged in the receiving groove and connected to the first wall, and the second connecting block is arranged in the receiving groove and connected to the second wall.

[0012] Optionally, the first base body is provided with an enclosing edge and a receiving groove enclosed by the enclosing edge, the first control component is arranged in the receiving groove, and the enclosing edge is used to abut against a box body of the battery box to enclose the receiving groove.

[0013] Optionally, the first control component comprises a circuit board and a control circuit connected to the circuit board, the control circuit is used to electrically connect battery components in the battery box and control circuits of control components of other battery boxes, the control circuit comprises a switch component arranged on the circuit board, and the switch component is used to switch series connection or parallel connection of the battery components in at least two battery boxes.

[0014] In a second aspect of the present disclosure, a battery box is provided, comprising a box body, battery components arranged in the box body, and a control component arranged outside the box body and connected to an outer wall of the box body.

[0015] Optionally, the box body is provided with a connector connecting the first control component and the battery components.

[0016] In a third aspect of the present disclosure, an energy storage device is provided, comprising a plurality of the above battery boxes.

[0017] Optionally, the plurality of battery boxes are arranged in sequence along a first direction, and adjacent two control components of adjacent two battery boxes are arranged adjacent to each other and electrically connected.

[0018] Optionally, the first plug-in part of the control assembly is electrically connected with the connector on the box body, and the second plug-in part of one of the control assemblies of the adjacent two battery boxes is electrically connected with the third plug-in part of the control assembly of the other battery box, or the third plug-in part of one of the control assemblies is electrically connected with the second plug-in part of the control assembly of the other battery box.

[0019] Optionally, the energy storage device comprises a control box located at any end of the plurality of battery boxes in the first direction, the control box comprising a second box body, a battery management system arranged in the second box body, and a second control assembly arranged on the outer wall of the second box body, the second control assembly comprising a second base connected to the second box body and a second control component arranged on the second base, the second control component electrically connecting the battery management system and the first control component on the battery box adjacent to the control box, and the second base being connected to the first base on the battery box adjacent to the control box.

[0020] Optionally, the plurality of battery boxes comprise a first battery box adjacent to the control box and a plurality of second battery boxes, the control lines of the first control component of the second battery boxes comprising a first line, a second line and a third line.

[0021] The first line is connected to the positive electrode of the battery assembly of the battery box and the positive electrodes of the battery assemblies of the other two battery boxes, respectively, and a first switch is arranged on the first line.

[0022] The second line is connected to the negative electrode of the battery assembly of the battery box and the negative electrodes of the battery assemblies of the other two battery boxes, respectively, and a second switch is arranged on the second line.

[0023] The third line is connected to the first line and the second line, respectively, so that a plurality of battery assemblies of a plurality of battery boxes can be connected in series by means of part of the first line and part of the second line, and a third switch is arranged on the third line.

[0024] Optionally, the control lines of the first control component of the first battery box comprise a fourth line, a fifth line and a sixth line.

[0025] The fourth line is connected to the battery management system and the negative electrode of the battery assembly of the second battery box farthest from the control box, respectively, and a fourth switch is arranged on the fourth line.

[0026] The fifth line is connected to the battery management system, the positive electrode of the battery assembly of the first battery box and the positive electrode of the battery assembly of the second battery box adjacent to the first battery box respectively, and a fifth switch is arranged on the fifth line.

[0027] The sixth line is connected to the battery management system, the negative electrode of the battery assembly of the first battery box and the negative electrode of the battery assembly of the second battery box adjacent to the first battery box respectively, and a sixth switch is arranged on the sixth line.

[0028] Optionally, the energy storage device further comprises a base, and the plurality of battery boxes are arranged on the base.

[0029] Through the above technical solution, the first control component of the present disclosure is arranged on the first base, and the first base is detachably mounted on the box body of the battery box, so that when the control assembly is disassembled or overhauled, only the first base needs to be disassembled, that is, the disassembly and overhaul of the control assembly and the first control component thereon can be realized, and the efficiency of disassembly and overhaul is improved. In addition, the first control component can also realize the series-parallel switching of the battery assemblies in at least two battery boxes to adapt to different application scenarios.

[0030] Other features and advantages of the present disclosure will be described in detail in the following specific embodiments. BRIEF DESCRIPTION OF DRAWINGS

[0031] The accompanying drawings are included to provide a further understanding of the present disclosure and constitute a part of the specification, and are used together with the following specific embodiments to explain the present disclosure, but do not constitute a limitation on the present disclosure. In the drawings:

[0032] FIG. 1 is a structural schematic view of a control assembly provided by an embodiment of the present disclosure;

[0033] FIG. 2 is a structural schematic view of a battery box provided by an embodiment of the present disclosure;

[0034] FIG. 3 is a structural schematic view of an energy storage device provided by an embodiment of the present disclosure;

[0035] FIG. 4 is a structural schematic view of an energy storage device connected by a control assembly provided by an embodiment of the present disclosure;

[0036] FIG. 5 is a partial enlarged view of B in FIG. 4;

[0037] FIG. 6 is a circuit connection schematic view of a battery assembly of an energy storage device provided by an embodiment of the present disclosure;

[0038] FIG. 7 is a parallel circuit connection schematic view of a battery assembly of an energy storage device provided by an embodiment of the present disclosure;

[0039] FIG. 8 is a schematic diagram of a series circuit connection of a battery assembly of an energy storage device according to an embodiment of the present disclosure. DETAILED DESCRIPTION

[0040] The specific embodiments of the present disclosure will be described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are merely intended to explain and illustrate the present disclosure, and are not intended to limit the present disclosure.

[0041] In the present disclosure, the orientation words such as "inner" and "outer" are used in the sense of "inner" and "outer" with respect to the outline of the corresponding component itself, unless otherwise stated. In addition, the terms "first", "second", "third" and the like used in the present disclosure are used to distinguish one element from another element, and do not have sequential and important meanings. Furthermore, in the following description, the same reference numerals in different drawings represent the same or similar elements, unless otherwise explained. The above definitions are only used to explain and illustrate the present disclosure, and should not be understood as limiting the present disclosure.

[0042] The control assembly 100, the battery box 8 and the energy storage device in the exemplary embodiments of the present disclosure will be described below with reference to the accompanying drawings.

[0043] Referring to FIGS. 1 to 6, in a first aspect of the present disclosure, a control assembly 100 is provided, comprising a first base body 1 and a first control component 2, wherein the first base body 1 is configured to be detachably mounted on a box body 4 of a battery box 8; the first control component 2 is arranged on the first base body 1, and the first control component 2 is configured to be electrically connected to a battery assembly 5 in the battery box 8 and to be electrically connected to a first control component 2 of another battery box 8, and the first control component 2 is configured to switch at least two battery assemblies 5 in at least two battery boxes 8 between series connection and parallel connection.

[0044] Since the first control component 2 is arranged on the first base body 1, and the first base body 1 is detachably mounted on the box body 4 of the battery box 8, when the control assembly 100 is disassembled and repaired, the worker only needs to disassemble and repair the first base body 1, so that the control assembly 100 can be disassembled and repaired, thereby improving the efficiency of disassembly and repair. In addition, the first control component 2 can also realize the series-parallel switching of the battery assemblies 5 in the at least two battery boxes 8, so as to adapt to different application scenarios.

[0045] The first control component 2 is electrically connected to the battery assembly 5 in the battery box 8, and the first control component 2 is electrically connected to the first control component 2 of the other battery box 8. The first control component 2 is used to switch the series or parallel connection of the battery assembly 5 in at least two battery boxes 8. It can be understood that a part of the first control component 2 can be used to switch the series or parallel connection of the battery assembly 5 in at least two battery boxes 8, for example, the control circuit 22 used to switch the series or parallel connection will be described below. Another part of the first control component 2 can also include a collection circuit for collecting temperature, voltage, current, etc. in the battery box 8. The collection circuit can be connected to a battery management system (which will be described below), and the present disclosure is not limited thereto.

[0046] In some embodiments of the present disclosure, as shown in FIG. 1, the control assembly 100 further includes a connecting piece 3 arranged on the first base body 1. The first base body 1 is connected to the box body 4 through the connecting piece 3 and is connected to the first base body 1 on the other battery box 8 through the connecting piece 3, so that the two adjacent battery boxes 8 are connected through the two adjacent control assemblies 100.

[0047] Therefore, the two adjacent battery boxes 8 can be connected through the two control assemblies 100 thereon. The connection can realize the physical connection of the two adjacent battery boxes 8, or can realize the electrical connection of the two adjacent battery boxes 8, or can realize both the electrical connection and the physical connection of the two adjacent battery boxes 8, for example, to realize the electrical connection on the basis of the relative fixation of the two adjacent battery boxes 8. Therefore, the two battery boxes 8 can be connected through the two adjacent control assemblies 100 without the need to set other connection structures, which can significantly reduce the number of connection structures for connecting the adjacent battery boxes 8 and the corresponding manufacturing cost in the related art, and can simplify the structure of the battery box 8 and further reduce the cost.

[0048] Specifically, as shown in FIG. 1, the connecting piece 3 can include a first plug-in part 31, a second plug-in part 32, and a third plug-in part 33. The first control component 2 is electrically connected to the battery assembly 5 in the battery box 8 through the first plug-in part 31. The first control component 2 is electrically connected to the third plug-in part 33 of the control assembly 100 of the other battery box 8 through the second plug-in part 32. The first control component 2 is electrically connected to the second plug-in part 32 of the control assembly 100 of the other battery box 8 through the third plug-in part 33, so that the two adjacent first control components 2 of the two adjacent battery boxes 8 are electrically connected.

[0049] Thus, the two adjacent battery boxes 8 can be physically connected through the second plug-in part 32 and the third plug-in part 33, and the two first control components 2 of the two adjacent battery boxes 8 can be electrically connected through the second plug-in part 32 and the third plug-in part 33, which can further significantly simplify the structure of the control assembly 100 and the structure of the battery box 8, and reduce the cost.

[0050] In the embodiment shown in FIG. 1, the first plug-in part 31 can be configured as a first plug or a first slot 311, the second plug-in part 32 is configured as one of a second plug 331 and a second slot 321, and the third plug-in part 33 is configured as the other of the second plug 331 and the second slot 321. That is, the connection piece 3 and the battery box 8, and the two adjacent connection pieces 3 can be plugged together in the form of plugs and slots, thereby facilitating the disassembly and assembly between the two adjacent control assemblies 100 and the battery box 8 corresponding to the control assembly 100, improving the disassembly and assembly efficiency, and further reducing the cost.

[0051] In addition, in an embodiment not shown, the two adjacent first bases 1 or the first base 1 and the box 4 of the battery box 8 can be connected together in the form of one or a combination of multiple connection modes such as buckling and fastener connection; in addition to the function of electrically connecting the first control components 2 in the two adjacent first bases 1 or electrically connecting the first base 1 and the battery assembly 5 in the battery box 8, the connection piece 3 can also function to assist in connecting the two adjacent first bases 1, thereby improving the stability of the two first bases 1 after being connected.

[0052] In some embodiments of the present disclosure, as shown in FIG. 1, the connection piece 3 includes a first connection block 34 and a second connection block 35, the first connection block 34 and the second connection block 35 are respectively located on opposite sides of the first base 1, the second plug 331 is arranged on the first connection block 34, the second slot 321 is arranged on the second connection block 35, and the first plug-in part 31 (such as the first plug or the first slot 311) is arranged on the first connection block 34 or the second connection block 35. On the one hand, the first connection block 34 and the second connection block 35 can serve as a base for arranging the plugs and slots, facilitating the arrangement of the plugs and slots on the first base 1, and on the other hand, the control lines 22 can be concentrated in the same area to serve the purpose of bundling the control lines 22, ensuring the neatness of the control lines 22 on the first base 1 and avoiding the situation that the control lines 22 are entangled with each other, thereby facilitating the disassembly and maintenance in the later stage.

[0053] In some embodiments, as shown in FIG. 1, the first base body 1 can include a receiving groove 11, the first control component 2 is arranged in the receiving groove 11, the first base body 1 has opposite first and second walls 12 and 13 located on both sides of the receiving groove 11, the first connecting block 34 is arranged in the receiving groove 11 and connected to the first wall 12, the second plug 331 protrudes from the first wall 12, and the second connecting block 35 is arranged in the receiving groove 11 and connected to the second wall 13. The arrangement of the receiving groove 11 can facilitate the arrangement of the first control component 2 in the first base body 1, so that the receiving groove 11 can to some extent form protection for the first control component 2, reducing or even avoiding the situation that the external force acts on the first control component 2 to cause damage to the first control component 2; and the positions of the first and second walls 12 and 13 can provide a mounting platform for the first and second connecting blocks 34 and 35, that is, the first and second connecting blocks 34 and 35 can be connected to the first base body 1 by connecting with the wall surfaces of the first and second walls 12 and 13, which can ensure the contact area of the first and second connecting blocks 34 and 35 when connected to the first base body 1, thereby improving the stability of the first and second connecting blocks 34 and 35 after connection.

[0054] As shown in FIG. 1, in order to facilitate the electrical connection of the first control component 2 and the battery assembly 5 of the battery box 8, the first base body 1 is provided with an edge 111, the edge 111 surrounds the receiving groove 11, the first control component 2 is arranged in the receiving groove 11, and the edge 111 is used to abut the box body 4 of the battery box 8 to close the receiving groove 11. In this way, after the first base body 1 is connected to the box body 4 of the battery box 8, the first base body 1 and the box body 4 can jointly enclose an outer shell of the first control component 2, thereby forming protection for the first control component 2. The edge 111 can be used to seal the connection between the first base body 1 and the box body 4.

[0055] In some embodiments not shown in the drawings, after the box body 4 of the battery box 8 is connected to the first base body 1, a groove can also be arranged at a position opposite to the receiving groove 11 of the box body 4, so that the receiving groove 11 can only accommodate part of the first control component 2, and the other part of the first control component 2 located outside the receiving groove 11 can be located in the groove. Based on this, the first base body 1 and the box body 4 can also enclose an outer shell of the first control component 2 to form protection for the first control component 2, which is not limited in the present disclosure.

[0056] Specifically, as shown in FIG. 1, the first base 1 can include a base plate 14 and first and second walls 12 and 13 connected to opposite ends of the base plate 14, and the base plate 14, the first and second walls 12 and 13 together form an edge 111 and a receiving groove 11. Among them, the base plate 14 can be arranged in any suitable structure, for example, the base plate 14 can be configured as an arc-shaped plate, and the arc-shaped region of the arc-shaped plate can form a semi-open receiving groove 11 to facilitate the installation of the first control component 2, and the first and second walls 12 and 13 are connected to the arc-shaped plate, and the first control component 2 is also convenient for connecting with the remaining control assembly 100 and the battery box 8.

[0057] In some embodiments of the present disclosure, as shown in FIG. 1, the first control component 2 can include a circuit board 21 and a control circuit 22 connected to the circuit board 21, the control circuit 22 is used to electrically connect the battery assembly 5 in the battery box 8 and the control circuit 22 of the control assembly 100 of the other battery box 8, the control circuit 22 includes a switch assembly 23 arranged on the circuit board 21, the switch assembly 23 is used to switch the series and parallel connection of the battery assembly 5 in at least two battery boxes 8 arranged in a stack. The battery assembly 5 in the adjacent two battery boxes 8 can realize the switching of series and parallel connection through different states of the switch assembly 23, for example, the switch assembly 23 can include three switches arranged side by side on the circuit board 21, and the opening and closing states of the three switches in different cases can affect the current direction in the control circuit 22, thereby achieving the effect of switching the series and parallel connection of the battery assembly 5 in at least two battery boxes 8.

[0058] Among them, the switch of the switch assembly 23 can be configured as a relay.

[0059] The second aspect of the present disclosure, as shown in FIG. 2, provides a battery box, which includes a box body 4, a battery assembly 5 and the above-mentioned control assembly 100, the battery assembly 5 is arranged in the box body 4, the control assembly 100 is arranged outside the box body 4 and connected to the outer wall of the box body 4, and the box body 4 is provided with a connector 41 connecting the first control component 2 and the battery assembly 5. Specifically, the connector 41 can be configured as one of a plug and a socket capable of plug-in cooperation with the plug, and the other of the plug and the socket can be arranged on the first control component 2, so that the connector 41 and the first control component 2 can be electrically connected through plug-in cooperation, and the first control component 2 can realize the series or parallel connection between the adjacent two battery assemblies 5.

[0060] In addition, it should be noted that the battery box 8 of the present disclosure has all the beneficial effects of the above-mentioned control assembly 100, which will not be described here again.

[0061] The third aspect of the present disclosure, as shown in FIG. 3, provides an energy storage device, which includes a plurality of the above-mentioned battery boxes 8, and has all the beneficial effects of the above-mentioned battery boxes 8, which will not be described here again.

[0062] The plurality of battery boxes 8 are arranged in sequence along the first direction A, and the two adjacent control assemblies 100 of the two adjacent battery boxes 8 are arranged adjacent to each other and electrically connected. Among them, the plurality of battery boxes 8 can be connected together in a stacked manner, for example, connected in the height direction of the battery box 8, so that the plurality of battery boxes 8 are connected to form an energy storage device while reducing the area occupied by the energy storage device in the length and width directions of the battery box 8, saving the floor space. At this time, the first direction A can be the height direction of the battery box 8, or it can be the vertical direction. In another embodiment, the first direction A can also be the length direction or the width direction of the battery box 8, for example, so that the plurality of battery boxes 8 are arranged side by side along the length direction or the width direction.

[0063] Exemplarily, the first plug-in part 31 of the control assembly 100 is electrically connected with the connector 41 on the box body 4, and the second plug-in part 32 of one of the two adjacent control assemblies 100 of the two adjacent battery boxes 8 is electrically connected with the third plug-in part 33 of the other control assembly 100, or the third plug-in part 33 of one of the two adjacent control assemblies 100 is electrically connected with the second plug-in part 32 of the other control assembly 100. Thus, through plug-in, the electrical connection of the adjacent battery boxes 8 is realized, and the physical connection between the adjacent battery boxes 8 can be realized, which can significantly simplify the structure, reduce the cost, and facilitate assembly, disassembly, replacement, etc.

[0064] In some embodiments of the present disclosure, as shown in FIGS. 3 and 4, the energy storage device can include a control box 6 located at any one end of the plurality of battery boxes 8 along the first direction A, the control box 6 including a second box body 61, a battery management system 62 (BMS) arranged in the second box body 61, and a second control assembly 63 arranged on the outer wall of the second box body 61, the second control assembly 63 including a second base body 631 connected to the second box body 61 and a second control component 9 arranged on the second base body 631, the second control component 9 electrically connecting the battery management system 62 and the first control component 2 on the battery box 8 adjacent to the control box 6, and the second base body 631 being connected to the first base body 1 on the battery box 8 adjacent to the control box 6. In this way, when disassembling or repairing the second control assembly 63 in the control box 6, only the second base body 631 needs to be disassembled, which improves the disassembly and repair efficiency of the control box 6. In addition, the first control component 2 and the second control component 9 can be controlled by the battery management system 62, so that at least two adjacent battery assemblies 5 in the energy storage device can be switched between series connection and parallel connection under the management and control of the battery management system 62.

[0065] Exemplarily, the plurality of battery boxes 8 comprises a first battery box 81 adjacent to the control box 6, and a plurality of second battery boxes 82, the control line 22 of the first control component 2 of the second battery box 82 can comprise a first line 221, a second line 222 and a third line 223.

[0066] The first line 221 is connected to the positive electrode of the battery assembly 5 of the battery box 8 where the first line 221 is located, and the positive electrodes of the two battery assemblies 5 of the other two battery boxes 8, and the first switch Kc is arranged on the first line 221.

[0067] The second line 222 is connected to the negative electrode of the battery assembly 5 of the battery box 8 where the second line 222 is located, and the negative electrodes of the two battery assemblies 5 of the other two battery boxes 8, and the second switch Kb is arranged on the second line 222.

[0068] The third line 223 is connected to the first line 221 and the second line 222, respectively, so that the plurality of battery assemblies 5 of the plurality of battery boxes 8 can be connected in series by means of part of the first line 221 and part of the second line 222, and the third switch Ka is arranged on the third line 223.

[0069] The control line 22 of the first control component 2 of the first battery box 81 comprises a fourth line 224, a fifth line 225 and a sixth line 226.

[0070] The fourth line 224 is connected to the battery management system 62 and the negative electrode of the battery assembly 5 of the second battery box 82 farthest from the control box 6, respectively, and the fourth switch K3 is arranged on the fourth line 224.

[0071] The fifth line 225 is connected to the battery management system 62, the positive electrode of the battery assembly 5 of the first battery box 81 and the positive electrode of the battery assembly 5 of the second battery box 82 adjacent to the first battery box 81, respectively, and the fifth switch K2 is arranged on the fifth line 225.

[0072] The sixth line 226 is connected to the battery management system 62, the negative electrode of the battery assembly 5 of the first battery box 81 and the negative electrode of the battery assembly 5 of the second battery box 82 adjacent to the first battery box 81, respectively, and the sixth switch K1 is arranged on the sixth line 226.

[0073] Therefore, the series-parallel switching of the battery assemblies 5 of the plurality of battery boxes 8 can be realized by the first switch Kc, the second switch Kb, the third switch Ka, the fourth switch K3, the fifth switch K2 and the sixth switch K1.

[0074] The disclosure exemplarily describes the implementation of series and parallel switching of multiple battery assemblies 5. For example, as shown in FIGS. 3-7, the energy storage device can include four battery boxes 8 and one control box 6. The switch assembly 23 on the first battery box 81 adjacent to the control box 6 can include three relay switches, such as the fourth switch K3, the fifth switch K2, and the sixth switch K1 described above. The switch assembly 23 on the remaining second battery box 82 can also include three relay switches, such as the first switch Kc, the second switch Kb, and the third switch Ka described above. The second control component 9 of the control box 6 can include a positive electrode B+, a negative electrode B-, and a double-pole switch Km, Kn connected between the positive electrode B+ and the negative electrode B- and the battery management system 62. The energy storage device can output electrical energy externally through the positive electrode B+ and the negative electrode B-, or store electrical energy in the energy storage device through the positive electrode B+ and the negative electrode B-.

[0075] When it is necessary to make the battery assemblies 5 in the four battery boxes 8 parallel to each other, as shown in FIG. 7, the sixth switch K1, the fifth switch K2 on the first battery box 81 adjacent to the control box 6, and the second switch Kb, the first switch Kc on each of the remaining battery boxes 8 can be in a closed state, and the remaining switches (such as the fourth switch K3 and the third switch Ka) can be in an open state. At this time, the sixth line 226 where the sixth switch K1 is located can be in communication with the negative electrode of the battery management system 62 and the negative electrode of the battery assembly 5 corresponding thereto, respectively. The fifth line 225 where the fifth switch K2 is located can be in communication with the positive electrode of the battery management system 62 and the positive electrode of the battery assembly 5 corresponding thereto, respectively. The second line 222 where the second switch Kb in the second battery box 82 is located can be in communication with the line where the sixth switch K1 or the second switch Kb in the battery box 8 adjacent thereto is located, and the second line 222 where the second switch Kb is located can be in communication with the negative electrode of the battery assembly 5 corresponding thereto. The first line 221 where the first switch Kc in the second battery box 82 is located can be in communication with the line where the fifth switch K2 or the first switch Kc in the battery box 8 adjacent thereto is located, and the first line 221 where the first switch Kc is located can be in communication with the positive electrode of the battery assembly 5 corresponding thereto. Based on this, after the double-pole switch is closed, the positive electrode will be connected to the positive electrode of the battery assembly 5, and the negative electrode will be connected to the negative electrode of the battery assembly 5, to achieve the parallel arrangement of the battery assemblies 5 in the multiple battery boxes 8 in the energy storage device.

[0076] When it is required to switch the parallel connection of the battery assemblies 5 in the multiple battery boxes 8 to a series connection, as shown in FIG. 8, under the control of the battery management system 62, the fifth switch K2, the fourth switch K3 on the first battery box 81 adjacent to the control box 6, and the third switch Ka on each of the remaining second battery boxes 82 are in a closed state, and the remaining switches (such as the first switch Kc, the second switch Kb, and the sixth switch K1) are in an open state. At this time, the fifth line 225 where the fifth switch K2 is located is connected in communication with the negative electrode of the battery management system 62 and the positive electrode of the battery assembly 5 corresponding thereto, respectively. The fourth line 224 where the fourth switch K3 is located is connected in communication with the positive electrode of the battery management system 62 and the negative electrode of the battery assembly 5 farthest from the control box 6, respectively. The third line 223 where the third switch Ka in the second battery box 82 is located can be connected to the positive electrode of the battery assembly 5 corresponding thereto and can be connected to the negative electrode of the battery assembly 5 in the adjacent battery box 8. Based on this, after the double-pole switch is closed, the series connection of the battery assemblies 5 in the multiple battery boxes 8 in the energy storage device can be achieved.

[0077] In addition, the manner in which the fourth line 224 where the fourth switch K3 is located is connected to the negative electrode of the battery assembly 5 of the second battery box 82 farthest from the control box 6 can be that an extension line is added in the control assembly 100 of each of the second battery boxes 82. Thus, the fourth line 224 can be connected to the negative electrode of the battery assembly 5 of the second battery box 82 farthest from the control box 6 through the extension line of each of the second battery boxes 82 in turn, wherein the extension line in the second battery box 82 farthest from the control box 6 can be connected to the negative electrode of the battery assembly 5 inside.

[0078] In addition, the disclosure only exemplarily shows the circuit for controlling the series and parallel switching of the multiple battery boxes 8 shown in FIGS. 6-8, but the disclosure is not limited thereto. The disclosure can achieve the series and parallel switching of the multiple battery boxes 8 through the cooperation of multiple control assemblies 100 in any suitable circuit. For example, independent series and parallel lines can be provided. When the multiple battery boxes 8 need to be in series, the series line is used, and the parallel line is disconnected. When the multiple battery boxes 8 need to be in parallel, the parallel line is used, and the series line is disconnected. The disclosure does not make specific limitations thereon, and those skilled in the art can arrange it according to actual needs. In addition, in the embodiments provided by the disclosure, the control line 22 in the first control component 2 can be arranged according to the circuit exemplarily shown in, for example, FIGS. 6-8, which will not be described herein again.

[0079] In some embodiments, as shown in FIG. 3, the energy storage device can further include a base 7, and the multiple battery boxes 8 are arranged on the base 7. The control box 6 is located on the side of the multiple battery boxes 8 away from the base 7. The base 7 can provide certain support for the energy storage device and facilitate the placement of the energy storage device.

[0080] In summary, the disclosure exemplarily shows the installation and use process of the control assembly 100, the battery box 8 and the energy storage device.

[0081] The circuit board 21 of the first control component 2 in the control assembly 100 can be installed in the accommodating groove 11 of the first base body 1, at this time, the central position of the circuit board 21 can be provided with the switch assembly 23, and the two ends are respectively electrically connected with the third plug-in part 33 of the first connecting block 34 located on the first wall 12 and the second plug-in part 32 of the second connecting block 35 located on the second wall 13 through the control line 22, and the first plug-in part 31 provided on the second connecting block 35 can also be electrically connected with the connector 41 on the box body 4 of the battery box 8, so that the control assembly 100 and the battery assembly 5 in the two battery boxes 8 arranged in adjacent stacks can be connected together through the connecting piece 3, that is, the control assembly 100 can be located outside the box body 4 of the battery box 8, so that when the control assembly 100 in the battery box 8 is disassembled or overhauled, only the first base body 1 needs to be disassembled, compared with the related art in which the control assembly 100 is arranged inside the box body 4 of the battery box 8, the disclosure does not need to disassemble the outer wall of the box body 4 of the battery box 8 to realize the disassembly and overhaul of the control assembly 100, thereby improving the disassembly and overhaul efficiency, in addition, the first control component 2 can also realize the series-parallel switching of the battery assemblies 5 in the adjacent two battery boxes 8, so as to adapt to different application scenarios.

[0082] The preferred embodiments of the disclosure are described in detail above in combination with the drawings, but the disclosure is not limited to the specific details in the above-described embodiments, and various simple modifications can be made to the technical solutions of the disclosure within the technical concept of the disclosure, and these simple modifications all belong to the protection scope of the disclosure.

[0083] In addition, it should be noted that various specific technical features described in the above specific embodiments can be combined in any appropriate manner without contradiction, and in order to avoid unnecessary repetition, the disclosure will not further describe various possible combination manners.

[0084] In addition, various different embodiments of the disclosure can also be combined in any manner, as long as it does not deviate from the idea of the disclosure, it should also be considered as disclosed by the disclosure.

Claims

1. A control assembly (100), comprising: a first base body (1) for detachably mounting on a box body (4) of a battery box (8); and a first control component (2) arranged on the first base body (1), the first control component (2) being partly for electrically connecting battery assemblies (5) in the battery box (8) and partly for electrically connecting with a further first control component (2) of a further battery box (8), the first control component (2) being at least for switching series or parallel connection of the battery assemblies (5) in at least two battery boxes (8). The control assembly (100) further comprises a connecting piece (3) arranged on the first base body (1), the first base body (1) being connected to the box body (4) by the connecting piece (3) and to the first base body (1) of the further battery box (8) by the connecting piece (3) so that two adjacent battery boxes (8) are connected by two adjacent control assemblies (100).

2. The control assembly (100) according to claim 1, wherein The connecting piece (3) comprises a first plug-in part (31), a second plug-in part (32) and a third plug-in part (33), the first control component (2) being electrically connected to the battery assemblies (5) in the battery box (8) by the first plug-in part (31), the first control component (2) being electrically connected to the third plug-in part (33) of the control assembly (100) of the further battery box (8) by the second plug-in part (32), the first control component (2) being electrically connected to the second plug-in part (32) of the control assembly (100) of the further battery box (8) by the third plug-in part (33) so that two first control components (2) of two adjacent battery boxes (8) are electrically connected.

3. The control assembly (100) according to claim 2, wherein The first plug-in part (31) is configured as a first plug or a first slot (311), the second plug-in part (32) is configured as one of a second plug (331) and a second slot (321), and the third plug-in part (33) is configured as the other of the second plug (331) and the second slot (321).

4. The control assembly of claim 3, wherein, The connecting piece (3) comprises a first connecting block (34) and a second connecting block (35), the first connecting block (34) and the second connecting block (35) being respectively located on opposite sides of the first base body (1), the second plug (331) being arranged on the first connecting block (34), the second slot (321) being arranged on the second connecting block (35), and the first plug-in part (31) being arranged on the first connecting block (34) or the second connecting block (35).

5. The control assembly of claim 4, wherein, ​ 6. The control assembly of claim 5, wherein, The first base body (1) comprises a containing groove (11), the first control component (2) is arranged in the containing groove (11), the first base body (1) has opposite first and second walls (12, 13) located on both sides of the containing groove (11), the first connecting block (34) is arranged in the containing groove (11) and connected to the first wall (12), and the second connecting block (35) is arranged in the containing groove (11) and connected to the second wall (13).

7. The control assembly of any one of claims 1-5, wherein, The first base body (1) is provided with an edge (111) and a containing groove (11) surrounded by the edge (111), the first control component (2) is arranged in the containing groove (11), and the edge (111) is used for abutting a box body of the battery box (8) to close the containing groove (11).

8. The control assembly of any of claims 1-7, wherein, The first control component (2) comprises a circuit board (21) and a control circuit (22) connected to the circuit board (21), the control circuit (22) is used for electrically connecting the battery assembly (5) in the battery box (8) and electrically connecting a control circuit (22) of the control assembly (100) of another battery box (8), the control circuit (22) comprises a switch assembly (23) arranged on the circuit board (21), and the switch assembly (23) is used for switching series connection or parallel connection of the battery assemblies (5) in at least two battery boxes (8).

9. A battery box (8) comprising a box body (4), a battery assembly (5), and the control assembly (100) according to any one of claims 1-8, the battery assembly (5) is arranged in the box body (4), and the control assembly (100) is arranged outside the box body (4) and connected to an outer wall of the box body (4).

10. The battery box (8) according to claim 9, wherein The box body (4) is provided with a connector (41) connected to the first control component (2) and the battery assembly (5).

11. An energy storage device comprising a plurality of battery boxes (8) according to claim 10.

12. The energy storage device of claim 11, wherein, The plurality of battery boxes (8) are arranged in sequence along a first direction, and adjacent two control assemblies (100) of adjacent two battery boxes (8) are arranged adjacent to each other and electrically connected.

13. The energy storage device of claim 11 or 12, wherein, The first plug-in part (31) of the control assembly (100) is electrically connected to the connector (41) on the box body (4), the second plug-in part (32) of one of the adjacent two control assemblies (100) of the adjacent two battery boxes (8) is electrically connected to the third plug-in part (33) of the other control assembly (100), or the third plug-in part (33) of one of the adjacent two control assemblies (100) is electrically connected to the second plug-in part (32) of the other control assembly (100).

14. The energy storage device of any one of claims 11-13, wherein, The energy storage device comprises a control box (6) located at any one end of the plurality of battery boxes (8) along a first direction, the control box (6) comprising a second box body (61), a battery management system (62) arranged in the second box body (61), and a second control assembly (63) arranged on the outer wall of the second box body (61), the second control assembly (63) comprising a second base body (631) connected to the second box body (61) and a second control component (9) arranged on the second base body (631), the second control component (9) being electrically connected to the battery management system (62) and the first control component (2) on the battery box (8) adjacent to the control box (6), and the second base body (631) being connected to the first base body (1) on the battery box (8) adjacent to the control box (6).

15. The energy storage device of claim 14, wherein, The plurality of battery boxes (8) comprises a first battery box (81) adjacent to the control box (6), and a plurality of second battery boxes (82), the control line (22) of the first control component (2) of the second battery box (82) comprising a first line (221), a second line (222) and a third line (223); The first line (221) is respectively connected to the positive electrode of the battery assembly (5) of the battery box (8) and the positive electrodes of the two battery assemblies (5) of the other two battery boxes (8), and the first line (221) is provided with a first switch (Kc); The second line (222) is respectively connected to the negative electrode of the battery assembly (5) of the battery box (8) and the negative electrodes of the two battery assemblies (5) of the other two battery boxes (8), and the second line (222) is provided with a second switch (Kb); The third line (223) is respectively connected to the first line (221) and the second line (222) to enable the plurality of battery assemblies (5) of the plurality of battery boxes (8) to be connected in series by means of part of the first line (221) and part of the second line (222), and the third line (223) is provided with a third switch (Ka).

16. The energy storage device of claim 15, wherein, The control line of the first control component (2) of the first battery box (81) comprises a fourth line (224), a fifth line (225) and a sixth line (226); The fourth line (224) is respectively connected to the battery management system (62) and the negative electrode of the battery assembly (5) of the second battery box (82) farthest from the control box (6), and the fourth line (224) is provided with a fourth switch (K3); The fifth line (225) is respectively connected to the battery management system (62), the positive electrode of the battery assembly (5) of the first battery box (81) and the positive electrode of the battery assembly (5) of the second battery box (82) adjacent to the first battery box (81), and the fifth line (225) is provided with a fifth switch (K2); The sixth line (226) is connected to the battery management system (62), the negative electrode of the battery assembly (5) of the first battery box (81), and the negative electrode of the battery assembly (5) of the second battery box (82) adjacent to the first battery box (81) respectively, and a sixth switch (K1) is arranged on the sixth line (226).

17. The energy storage device of any one of claims 11-16, wherein, The energy storage device further comprises a base (7), and the plurality of battery boxes (8) are arranged on the base (7).

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