Energy storage device and energy storage system

Abstract

The utility model discloses an energy storage device and an energy storage system. The energy storage device comprises a first battery box and a second battery box, the second battery box comprises a second battery pack; the first battery box and the second battery box are provided with a first connector, and the first battery box is provided with a second connector; one end of a first connector of the first battery box is electrically connected with other devices, and the other end is electrically connected with one of positive and negative electrodes of the first battery pack; the other anode and cathode of the first battery pack are electrically connected with one end of a second connector of the first battery box; the other end of the second connector of the first battery box is electrically connected with one end of the first connector of the second battery box; the other end of the first connector of the second battery box is electrically connected with positive and negative electrodes of the second battery pack. In the second battery box, the positive and negative electrodes of the other end of the first connector are electrically connected with the positive and negative electrodes of the second battery pack, so that a base is not needed, a loop position is avoided, and the space utilization rate of the energy storage device is improved.

Description

Technical Field

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

[0002] In the related art, in an energy storage device, a base needs to be provided, and a wire return position is arranged in the base, so the space utilization rate is relatively low. Summary of the Utility Model

[0003] The utility model aims to at least solve one of the technical problems existing in the prior art. For this purpose, the utility model provides an energy storage device which does not need to be provided with a base any more, so that the wire return position can be avoided, and the overall space utilization rate of the energy storage device is improved.

[0004] The utility model further provides an energy storage system.

[0005] The energy storage device according to the utility model includes: a first battery box, the first battery box includes: a first battery pack; a second battery box, the first battery box and the second battery box are stacked, the second battery box includes: a second battery pack; a connector, the connector includes: a first connector and a second connector, the first connectors are provided on both the first battery box and the second battery box, and the second connector is further provided on the first battery box; one end of the first connector of the first battery box is adapted to be electrically connected to other devices, and the other end is electrically connected to one of the positive and negative electrodes of the first battery pack; the other of the positive and negative electrodes of the first battery pack is electrically connected to one end of the second connector of the first battery box; the other end of the second connector located in the first battery box is electrically connected to one end of the first connector located in the second battery box; the other end of the first connector of the second battery box is electrically connected to the positive and negative electrodes of the second battery pack.

[0006] In the second battery box of the energy storage device according to the utility model, it is only necessary to electrically connect the positive and negative electrodes of the other end of the first connector to the positive and negative electrodes of the second battery pack with corresponding polarities, so that a base does not need to be provided any more, thereby avoiding the arrangement of the wire return position and improving the overall space utilization rate of the energy storage device.

[0007] In some examples of the present utility model, the energy storage device further includes: an electrical connection wire, the electrical connection wire includes: a positive connection wire and a negative connection wire; wherein, in the first battery box, one end of one of the positive connection wire and the negative connection wire is electrically connected to the first connector, and the other end is electrically connected to the first battery pack, and one end of the other of the positive connection wire and the negative connection wire is electrically connected to the first battery pack, and the other end is electrically connected to the second connector; and / or in the second battery box, one end of the positive connection wire and the negative connection wire is electrically connected to the first connector, and the other end is electrically connected to the second battery pack.

[0008] In some examples of the present utility model, the first connector is provided with a first plugging portion, the second connector is provided with a second plugging portion, and the first plugging portion is plugged with the second plugging portion for electrical connection.

[0009] In some examples of the present utility model, the first battery box further includes: a first housing, the first battery pack is disposed in the first housing, the second battery box further includes: a second housing, the second battery pack is disposed in the second housing, in the first battery box, the first connector is disposed on a side of the first housing away from the second housing, the second connector is disposed on a side of the first housing adjacent to the second housing, and in the second battery box, the first connector is disposed on a side of the second housing adjacent to the first housing.

[0010] In some examples of the present utility model, the energy storage device further includes: a grounding member, the grounding member includes: a first grounding member, in the first battery box, the first grounding member is connected between the first connector and the first housing, and in the second battery box, the first grounding member is connected between the first connector and the second housing.

[0011] In some examples of the present utility model, the energy storage device further includes: a grounding member, the grounding member includes: a first grounding member and a second grounding member, and the second grounding member connects the second connector and the first grounding member.

[0012] In some examples of the present utility model, a mating portion is provided on the first connector or the second connector, and the first grounding member is fitted in the mating portion.

[0013] In some examples of the present utility model, the energy storage device further includes: a ground wire structure, the ground wire structure is disposed on the first connector or the second connector, and the first grounding member is connected to the ground wire structure through the mating portion.

[0014] In some examples of the present utility model, the energy storage device further includes: a first mounting bracket and a second mounting bracket. The first mounting bracket is connected to both the first housing and the second housing. The second mounting bracket is further connected to the first housing. The first connector is disposed on the first mounting bracket, the first grounding member is connected to the first mounting bracket, and the second connector is disposed on the second mounting bracket.

[0015] In some examples of the present utility model, the first mounting bracket includes: a main body portion and two mounting legs. The first connector is disposed on the main body portion. The two mounting legs are connected to both ends of the main body portion, and the two mounting legs are respectively connected to the first housing and the second housing.

[0016] In some examples of the present utility model, the energy storage device further includes: a first signal line and a second signal line. The first battery box further includes: a first circuit board disposed on the first housing, and / or the second battery box further includes: a second circuit board disposed on the second housing. In the first battery box, the first signal line is connected between the first connector and the first circuit board, and the second signal line is connected between the second connector and the first circuit board. In the second battery box, the first signal line is connected between the first connector and the second circuit board.

[0017] In some examples of the present utility model, the energy storage device further includes: a power line. In the first battery box, the power line is electrically connected between the first connector and the second connector.

[0018] The energy storage system according to the present utility model includes: the above-mentioned energy storage device, and a plurality of the first battery boxes are stacked on top of each other.

[0019] The additional aspects and advantages of the present utility model will be partially given in the following description, partially become apparent from the following description, or be understood through the practice of the present utility model. Description of the Drawings

[0020] The above and / or additional aspects and advantages of the present utility model will become apparent and be readily understood from the description of the embodiments in conjunction with the following drawings, where:

[0021] Figure 1 is a schematic structural diagram of an energy storage device according to an embodiment of the present utility model;

[0022] Figure 2 is a schematic structural diagram of the first battery box;

[0023] Figure 3It is a schematic structural diagram of the second battery box;

[0024] Figure 4 It is a cross-sectional view of the connector;

[0025] Figure 5 It is a partial explosion diagram of the energy storage device according to an embodiment of the present invention;

[0026] Figure 6 It is a schematic structural diagram of the second connector.

[0027] Reference numerals:

[0028] 1. Energy storage device;

[0029] 2. First battery box; 3. Second battery box; 10. Connector; 11. First connector; 111. Fitting part; 12. Second connector; 20. Grounding part; 21. First grounding part; 22. Second grounding part; 30. First housing; 40. First mounting bracket; 41. Main body part; 42. Mounting support feet; 50. First circuit board; 60. First signal line; 70. First battery pack; 80. Positive connection line; 90. Second signal line; 100. Negative connection line; 110. Power line; 120. Ground wire structure; 130. Second mounting bracket; 140. Second housing; 150. Second battery pack; 160. Second circuit board. Detailed implementation manners

[0030] The embodiments of the present invention will be described in detail below. The embodiments described with reference to the accompanying drawings are exemplary. The embodiments of the present invention will be described in detail below.

[0031] Below, refer to Figures 1 - 6 Describe the energy storage device 1 according to an embodiment of the present invention. The energy storage device 1 can supply power to corresponding electrical equipment.

[0032] As Figures 1 - 4 shown, the energy storage device 1 according to an embodiment of the present invention includes: a first battery box 2, a second battery box 3, a connector 10, and electrical connection lines. Among them, the first battery box 2 and the second battery box 3 play a role in energy storage, the connector 10 mainly plays a role in signal transmission, and the electrical connection lines can play a role in electrical connection. The second battery box 3 is stacked with the first battery box 2, so that the first battery box 2 and the second battery box 3 can be electrically connected together through the electrical connection lines, thereby improving the energy storage effect of the energy storage device 1.

[0033] As Figures 1 - 3As shown, the first battery box 2 includes: a first battery pack 70, and the second battery box 3 includes: a second battery pack 150. The first battery box 2 stores energy through the first battery pack 70, and the second battery box 3 stores energy through the second battery pack 150. The connector 10 includes: a first connector 11 and a second connector 12. The first connector 11 is provided on both the first battery box 2 and the second battery box 3. The first battery box 2 is further provided with the second connector 12. One end of the first connector 11 of the first battery box 2 is adapted to be electrically connected to other devices, and the other end is electrically connected to one of the positive and negative poles of the first battery pack 70 in a polarity-corresponding manner. The other of the positive and negative poles of the first battery pack 70 is electrically connected to one end of the second connector 12 of the first battery box 2. The other end of the second connector 12 located in the first battery box 2 is electrically connected to one end of the first connector 11 located in the second battery box 3. The other end of the first connector 11 of the second battery box 3 is electrically connected to the positive and negative poles of the second battery pack 150. Among them, the first battery pack 70 includes at least one battery, and the positive and negative poles of the first battery pack 70 are the total positive and total negative.

[0034] That is to say, the first connector 11 is respectively provided on the first battery box 2 and the second battery box 3, the second connector 12 is provided on the first battery box 2, and the second connector 12 located in the first battery box 2 is electrically connected to the first connector 11 located in the second battery box 3. That is to say, the first connector 11 is provided inside the first battery box 2 and also inside the second battery box 3, while the second connector 12 is only provided inside the first battery box 2, and the second connector 12 located in the first battery box 2 is electrically connected to the first connector 11 located in the second battery box 3, so that the electrical connection between the first battery box 2 and the second battery box 3 can be ensured.

[0035] As Figures 1 - 3 shown, the electrical connection line 4 includes: a positive connection line 80 and a negative connection line 100. Among them, in the first battery box 2, one end of one of the positive connection line 80 and the negative connection line 100 is electrically connected to the first connector 11, and the other end of one of the positive connection line 80 and the negative connection line 100 is electrically connected to the first battery pack 70. The other end of the other of the positive connection line 80 and the negative connection line 100 is electrically connected to the first battery pack 70, and the other end of the other of the positive connection line 80 and the negative connection line 100 is electrically connected to the second connector 12, and / or in the second battery box 3, one end of the positive connection line 80 and the negative connection line 100 is electrically connected to the first connector 11, and the other end of the positive connection line 80 and the negative connection line 100 is electrically connected to the second battery pack 150.

[0036] For example: In the first battery box 2, one end of the positive connection line 80 is electrically connected to the first connector 11, and the other end of the positive connection line 80 is electrically connected to the first battery pack 70. One end of the negative connection line 100 is electrically connected to the first battery pack 70, and the other end of the negative connection line 100 is electrically connected to the second connector 12. In this way, current can be introduced into the first battery pack 70 from the first connector 11 through the positive connection line 80, and then the current in the first battery pack 70 can be introduced into the second connector 12 through the negative connection line 100.

[0037] In the second battery box 3, one end of the positive connection line 80 is electrically connected to the first connector 11, and the other end of the positive connection line 80 is electrically connected to the second battery pack 150. Since the second connector 12 in the first battery box 2 is electrically connected to the first connector 11 in the second battery box 3, the current at the second connector 12 in the first battery box 2 can flow into the first connector 11 in the second battery box 3. And in the second battery box 3, current can be introduced into the second battery pack 150 from the first connector 11 through the positive connection line 80. In this way, the electrical connection between the first battery pack 70 and the second battery pack 150 can be realized.

[0038] Therefore, in the second battery box 3, it is only necessary to electrically connect the positive and negative poles at the other end of the first connector 11 to the positive and negative poles of the second battery pack 150 with corresponding polarities. In this way, there is no need to set up a base, thus avoiding the setting of a return line position and improving the overall space utilization rate of the energy storage device 1.

[0039] Among them, a first plugging part is provided on the first connector 11, and a second plugging part is provided on the second connector 12. The first plugging part and the second plugging part are plugged to be electrically connected. The electrical connection between the first plugging part and the second plugging part enables the electrical connection between the second connector 12 in the first battery box 2 and the first connector 11 in the second battery box 3, thereby realizing the electrical connection between the first battery pack 70 and the second battery pack 150.

[0040] In addition, as Figures 1 - 3 shown, the first battery box 2 further includes: a first housing 30, the first battery pack 70 is arranged inside the first housing 30. The second battery box 3 further includes: a second housing 140, the second battery pack 150 is arranged inside the second housing 140. In the first battery box 2, the first connector 11 is arranged on one side of the first housing 30 away from the second housing 140, and the second connector 12 is arranged on one side of the first housing 30 adjacent to the second housing 140. In the second battery box 3, the first connector 11 is arranged on one side of the second housing 140 adjacent to the first housing 30.

[0041] The first battery pack 70 is disposed within the first housing 30, such that the first battery pack 70 can be protected from damage. Similarly, the second battery pack 150 is disposed within the second housing 140, such that the second battery pack 150 can be protected from damage. In the first battery box 2, the first connector 11 is disposed on a side of the first housing 30 away from the second housing 140, and the second connector 12 is disposed on a side of the first housing 30 adjacent to the second housing 140. In the second battery box 3, the first connector 11 is disposed on a side of the second housing 140 adjacent to the first housing 30, facilitating the electrical connection between the second connector 12 of the first battery box 2 and the first connector 11 of the second battery box 3.

[0042] Of course, as Figure 2 and Figure 3 shown, the energy storage device 1 further includes: a grounding member 20, which includes a first grounding member 21 and a second grounding member 22. In the first battery box 2, the first grounding member 21 is connected between the first connector 11 and the first housing 30, and the second grounding member 22 connects the second connector 12 and the first grounding member 21. In the second battery box 3, the first grounding member 21 is connected between the first connector 11 and the second housing 140.

[0043] Both the first grounding member 21 and the second grounding member 22 can function to conduct current. In the first battery box 2, the first grounding member 21 is connected between the first connector 11 and the first housing 30. Thus, when a leakage occurs in the first battery box 2, the leakage current can be transmitted between the corresponding first connector 11, first grounding member 21, and first housing 30, and then facilitated to be transmitted to the ground. The second grounding member 22 connects the second connector 12 and the first grounding member 21. Thus, when a leakage occurs in the first battery box 2, the leakage current can be transmitted between the corresponding second connector 12, second grounding member 22, first grounding member 21, and first housing 30, and then facilitated to be transmitted to the ground. Similarly, in the second battery box 3, the first grounding member 21 is connected between the first connector 11 and the second housing 140. When a leakage occurs in the second battery box 3, the leakage current can be transmitted between the corresponding first connector 11, first grounding member 21, and second housing 140, and then facilitated to be transmitted to the ground. In this way, the leakage safety of the first battery box 2 and the second battery box 3 can be ensured.

[0044] Or, as Figure 5 and Figure 6As shown, a mating portion 111 is provided on the first connector 11 or the second connector 12, and the first grounding member 21 is fitted into the mating portion 111. Among them, the mating portion 111 mainly plays a role in installation. It can replace the second grounding member 22 and fit the first grounding member 21 into the mating portion 111. In this way, the mating portion 111 can be used to install and limit the first grounding member 21, so as to facilitate the fixed connection between the first grounding member 21 and the second connector 12. Moreover, to a certain extent, the mating portion 111 can also play a role in avoidance. By fitting the first grounding member 21 into the mating portion 111, it can be avoided that the part of the first grounding member 21 mating with the second connector 12 protrudes outside the second connector 12, thus avoiding interference with other components and facilitating installation and setting. The mating portion 111 can be a sunk groove structure.

[0045] In addition, as Figure 5 shown, the energy storage device 1 further includes a ground wire structure 120. The ground wire structure 120 is provided on the first connector 11 or the second connector 12, and the first grounding member 21 is connected to the ground wire structure 120 through the mating portion 111. Among them, the ground wire structure 120 mainly plays a role in conduction. By providing the ground wire structure 120 on the first connector 11 or the second connector 12, the current in the first connector 11 or the second connector 12 can be led out through the ground wire structure 120. The first grounding member 21 is connected to the ground wire structure 120 through the mating portion 111. In this way, after the current in the first connector 11 or the second connector 12 is led out to the ground wire structure 120, it will be led out to the first grounding member 21, and then it is convenient to be output to the outside. Specifically, the first grounding member 21 is also in contact conduction with the first housing 30. In this way, the current led out from the ground wire structure 120 to the first grounding member 21 will be transmitted to the first housing 30, and then it is convenient for the current to be input to the ground, improving the safety of the energy storage device 1.

[0046] It should be noted that the setting of the ground wire structure 120 can replace the setting of the existing lead wire, simplify the process, improve the installation efficiency of the first connector 11, and shorten the installation space and installation cost of the first connector 11.

[0047] Furthermore, as Figure 1As shown, the energy storage device 1 further includes: a first mounting bracket 40. The first connector 11 is disposed on the first mounting bracket 40. The first mounting bracket 40 is connected to both the first housing 30 and the second housing 140. The first grounding member 21 is connected to the first mounting bracket 40. Among them, the first mounting bracket 40 mainly functions as a mounting component. The first connector 11 is mounted on the first mounting bracket 40, so that the first connector 11 can be fixed, making the connection between the first connector 11 and the first mounting bracket 40 more reliable and stable, and enabling the first connector 11 to better perform the connection and conduction work. The first mounting bracket 40 is respectively connected to the first housing 30 and the second housing 140, which can further fix the first mounting bracket 40, making the arrangement of the first mounting bracket 40 more reliable and stable, so that the first mounting bracket 40 can better support the first connector 11.

[0048] The first grounding member 21 is connected to the first mounting bracket 40, which can make the connection between the first grounding member 21 and the first mounting bracket 40 more stable, enabling the first grounding member 21 to better perform its work. It should be noted that the first mounting bracket 40 is fixedly connected to the first housing 30, so that the current on the first grounding member 21 can be led out to the first housing 30 through the first mounting bracket 40, facilitating the grounding operation. The first grounding member 21 and the first mounting bracket 40 can be fixedly connected by screws.

[0049] Specifically, as Figures 1 - 3 shown, the first mounting bracket 40 includes: a main body portion 41 and two mounting feet 42. The first connector 11 is disposed on the main body portion 41. The two mounting feet 42 are connected to both ends of the main body portion 41. The two mounting feet 42 are respectively connected to the first housing 30 and the two mounting feet 42 are respectively connected to the second housing 140. Among them, the main body portion 41 is the main part of the first mounting bracket 40, mainly functioning as a mounting component, and the mounting feet 42 mainly function as support components. Specifically, the first connector 11 is mounted on the main body portion 41. It should be noted that the main body portion 41 is located above the first battery box 1. Therefore, it is more reasonable to dispose the first connector 11 on the main body portion 41, facilitating the cooperation of the first connector 11 with the corresponding components above.

[0050] The two mounting feet 42 are respectively connected to the first housing 30 and the two mounting feet 42 are respectively connected to the second housing 140, which can fix the two mounting feet 42, making the arrangement of the two mounting feet 42 more reliable and stable. Also, the two mounting feet 42 are connected to both ends of the main body portion 41, so that the two mounting feet 42 can respectively support the main body portion 41 from both ends, making the arrangement of the main body portion 41 more stable, and thus the main body portion 41 can better support the first connector 11.

[0051] In addition, as Figure 5 shown, the energy storage device 1 further includes a second mounting bracket 130. The second connector 12 is disposed on the second mounting bracket 130, and the second mounting bracket 130 is also connected to the first housing 30. Among them, the second mounting bracket 130 mainly serves for mounting. By disposing the second connector 12 on the second mounting bracket 130, the second connector 12 can be fixed, making the arrangement of the second connector 12 more secure and stable, and enabling the second connector 12 to work better. The second mounting bracket 130 is connected to the first housing 30, so that the first housing 30 can further fix the second mounting bracket 130, thereby enabling the second mounting bracket 130 to better support the second connector 12.

[0052] In addition, as Figures 1 - 3 shown, the energy storage device 1 further includes: a first signal line 60 and a second signal line 90. The first battery box 2 further includes: a first circuit board 50, the first circuit board 50 is disposed on the first housing 30, and / or the second battery box 3 further includes: a second circuit board 160, the second circuit board 160 is disposed on the second housing 140. In the first battery box 2, the first signal line 60 is connected between the first connector 11 and the first circuit board 50, and the second signal line 90 is connected between the second connector 12 and the first circuit board 50. In the second battery box 3, the first signal line 60 is connected between the first connector 11 and the second circuit board 160.

[0053] Among them, both the first circuit board 50 and the second circuit board 160 can play the role of connecting and transmitting signals, and both the first signal line 60 and the second signal line 90 can play the role of transmitting signals. By disposing the first circuit board 50 on the first housing 30, the first circuit board 50 can be fixed, making the arrangement of the first circuit board 50 more secure and stable, and enabling the first circuit board 50 to work better. Similarly, by disposing the second circuit board 160 on the second housing 140, the second circuit board 160 can be fixed, making the arrangement of the second circuit board 160 more secure and stable, and enabling the second circuit board 160 to work better.

[0054] In the first battery box 2, a first signal line 60 is connected between the first connector 11 and the first circuit board 50, so that the first signal line 60 can transmit the information collected by the first circuit board 50 to the first connector 11, and then through the first connector 11 to an external controller. A second signal line 90 is connected between the second connector 12 and the first circuit board 50, so that signals can be transmitted between the corresponding second connector 12 and the first circuit board 50 through the second signal line 90. Similarly, in the second battery box 3, the first signal line 60 is connected between the first connector 11 and the second circuit board 160, so that the first signal line 60 can transmit the information collected by the second circuit board 160 to the first connector 11, and then through the first connector 11 to an external controller. It should be noted that the first circuit board 50 mainly collects parameters such as the state of the first battery pack 70, and the second circuit board 160 mainly collects parameters such as the state of the second battery pack 150. For example, the temperature, voltage, etc. of the first battery pack 70 and the second battery pack 150.

[0055] In addition, as Figure 3 shown, the energy storage device 1 further includes: a power line 110. In the first battery box 2, the power line 110 is electrically connected between the first connector 11 and the second connector 12. Among them, the power line 110 mainly plays a role in transmitting signals. Connecting the power line 110 between the first connector 11 and the second connector 12 enables signals to be transmitted between the first connector 11 and the second connector 12 through the power line 110, thereby realizing conduction between the first connector 11 and the second connector 12 of the same connector 10.

[0056] As Figure 1 shown, the energy storage system according to an embodiment of the present invention includes: the energy storage device 1 described in the above embodiment.

[0057] It should be noted that, as Figure 1 shown, the energy storage system can be stacked and composed of the second battery box 3 at the bottom layer and the first battery box 2 located above the second battery box 3. The number of the first battery boxes 2 can be one or multiple, and the multiple first battery boxes 2 are stacked.

[0058] For example, for instance: as Figure 1As shown in the figure, there is a second battery box 3 and two first battery boxes 2. When the second battery box 3 located below is stacked with the first battery box 2, the first connector 11 of the second battery box 3 located below will be plugged into the second connector 12 of the first battery box 2. At the same time, the first signal line 60 of the first battery box 2 will be connected to the second signal line 90 of the second battery box 3 located below. After the first battery box 2 and the second battery box 3 below are installed, another first battery box 2 is assembled above the first battery box 2 located below. Similarly, during the installation process, the second connector 12 of the first battery box 2 located above will be plugged into the first connector 11 of the first battery box 2 located below, and the second signal line 90 of the first battery box 2 located above will be connected to the first signal line 60 of the first battery box 2 located below. In this way, the series connection between the three battery boxes can be realized. In addition, the status information of the first battery pack 70 and the second battery pack 150 collected can be transmitted from the first connector 11 of the first battery box 2 located above to the external controller.

[0059] It should be noted that one end of the first grounding piece 21 and the second grounding piece 22 on the two first battery boxes 2 connected to the first housing 30 are both connected to the lower side of the corresponding first housing 30, and the second battery box 3 can be directly grounded to the ground. In this way, when any one of the two first battery boxes 2 leaks electricity, the leakage current can be transported to the second battery box 3 through the corresponding first housing 30 and the grounding piece 20, and thus grounding can be achieved to protect the energy storage system. In addition, during the assembly process of the energy storage system, the sides of the two upper first battery boxes 2 and the second battery box 3, that is, the parts not grounded through the corresponding grounding piece 20, can be in contact with each other, so that the leakage current can be transported to the second battery box 3, and thus the grounding of the side of the first battery box 2 can be achieved, further improving the safety.

[0060] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present invention.

[0061] In the description of the present utility model, "a feature", "a second feature" may include one or more of such features. In the description of the present utility model, the meaning of "a plurality of" is two or more. In the description of the present utility model, a feature being "above" or "below" a second feature may include being in direct contact with the second feature, or may include not being in direct contact with the second feature but being in contact through additional features therebetween. In the description of the present utility model, a feature being "above", "upward" and "on" a second feature includes the feature being directly above and obliquely above the second feature, or merely indicating that the feature has a higher horizontal height than the second feature.

[0062] In the description of this specification, descriptions with reference to terms such as "an embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples", etc. mean that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present utility model. In this specification, the schematic descriptions of the above terms do not necessarily refer to the same embodiment or example.

[0063] Although the embodiments of the present utility model have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and purposes of the present utility model, and the scope of the present utility model is defined by the claims and their equivalents.

Claims

1. An energy storage device (1), characterized in that, Comprising: A first battery box (2), the first battery box (2) comprising: a first battery pack (70); A second battery box (3), the first battery box (2) and the second battery box (3) being stacked, the second battery box (3) comprising: a second battery pack (150); A connector (10), the connector (10) comprising: a first connector (11) and a second connector (12), the first connector (11) being provided on both the first battery box (2) and the second battery box (3), and the second connector (12) being further provided on the first battery box (2); One end of the first connector (11) of the first battery box (2) is adapted to be electrically connected to other devices, and the other end is electrically connected to one of the positive and negative electrodes of the first battery pack (70); The other of the positive and negative electrodes of the first battery pack (70) is electrically connected to one end of the second connector (12) of the first battery box (2); The other end of the second connector (12) of the first battery box (2) is electrically connected to one end of the first connector (11) of the second battery box (3); The other end of the first connector (11) of the second battery box (3) is electrically connected to the positive and negative electrodes of the second battery pack (150).

2. The energy storage device (1) according to claim 1, characterized in that, Further comprising: An electrical connection line, the electrical connection line (4) comprising: a positive connection line (80) and a negative connection line (100); Wherein, in the first battery box (2), one end of one of the positive connection line (80) and the negative connection line (100) is electrically connected to the first connector (11), and the other end is electrically connected to the first battery pack (70), and one end of the other of the positive connection line (80) and the negative connection line (100) is electrically connected to the first battery pack (70), and the other end is electrically connected to the second connector (12); and / or In the second battery box (3), one end of the positive connection line (80) and the negative connection line (100) is electrically connected to the first connector (11), and the other end is electrically connected to the second battery pack (150).

3. The energy storage device (1) according to claim 1, characterized in that, The first connector (11) is provided with a first plugging portion, and the second connector (12) is provided with a second plugging portion, and the first plugging portion is plugged with the second plugging portion for electrical connection.

4. The energy storage device (1) according to claim 1, characterized in that, The first battery box (2) further comprises: a first housing (30), the first battery pack (70) being disposed in the first housing (30), the second battery box (3) further comprises: a second housing (140), the second battery pack (150) being disposed in the second housing (140), in the first battery box (2), the first connector (11) is disposed on a side of the first housing (30) away from the second housing (140), the second connector (12) is disposed on a side of the first housing (30) adjacent to the second housing (140), and in the second battery box (3), the first connector (11) is disposed on a side of the second housing (140) adjacent to the first housing (30).

5. The energy storage device (1) according to claim 4, wherein, Further comprising: A grounding member (20), the grounding member (20) includes: a first grounding member (21), in the first battery box (2), the first grounding member (21) is connected between the first connector (11) and the first housing (30), in the second battery box (3), the first grounding member (21) is connected between the first connector (11) and the second housing (140).

6. The energy storage device (1) according to claim 4, characterized in that, It further includes: A grounding member (20), the grounding member (20) includes: a first grounding member (21) and a second grounding member (22), the second grounding member (22) connects the second connector (12) and the first grounding member (21).

7. The energy storage device (1) according to claim 6, characterized in that, A mating portion (111) is provided on the first connector (11) or the second connector (12), and the first grounding member (21) is mated within the mating portion (111).

8. The energy storage device (1) according to claim 7, wherein, It further includes: a ground wire structure (120), the ground wire structure (120) is provided on the first connector (11) or the second connector (12), and the first grounding member (21) is connected to the ground wire structure (120) through the mating portion (111).

9. The energy storage device (1) according to claim 5, characterized in that, It further includes: A first mounting bracket (40) and a second mounting bracket (130), the first mounting bracket (40) is connected to both the first housing (30) and the second housing (140), the second mounting bracket (130) is further connected to the first housing (30), the first connector (11) is disposed on the first mounting bracket (40), the first grounding member (21) is connected to the first mounting bracket (40), and the second connector (12) is disposed on the second mounting bracket (130).

10. The energy storage device (1) according to claim 9, characterized in that, The first mounting bracket (40) includes: a main body portion (41) and two mounting legs (42), the first connector (11) is disposed on the main body portion (41), the two mounting legs (42) are connected to both ends of the main body portion (41), the two mounting legs (42) are respectively connected to the first housing (30), and the two mounting legs (42) are respectively connected to the second housing (140).

11. The energy storage device (1) according to claim 4, characterized in that It further includes: A first signal line (60) and a second signal line (90), the first battery box (2) further includes: a first circuit board (50), the first circuit board (50) is disposed on the first housing (30), and / or the second battery box (3) further includes: a second circuit board (160), the second circuit board (160) is disposed on the second housing (140), in the first battery box (2), the first signal line (60) is connected between the first connector (11) and the first circuit board (50), the second signal line (90) is connected between the second connector (12) and the first circuit board (50), in the second battery box (3), the first signal line (60) is connected between the first connector (11) and the second circuit board (160).

12. The energy storage device (1) according to claim 1, characterized in that, It further includes: The power line (110), in the first battery box (2), the power line (110) is electrically connected between the first connector (11) and the second connector (12).

13. An energy storage system, characterized in that, Comprising: The energy storage device (1) according to any one of claims 1-12, wherein a plurality of the first battery boxes (2) are stacked between the plurality of the first battery boxes (2).

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