Battery pack, energy storage device and stacked household energy storage system

Abstract

The utility model provides a battery pack, an energy storage device and a stacked household energy storage system, the battery pack is provided with a first surface and a second surface opposite to the first surface, the first surface is provided with a first connector, the second surface is provided with a second connector, and the first connector is connected with the second connector. The first connector is used for being connected with the second connector of another battery pack in a plugging manner; the first surface is also provided with at least one first clamping structure, the second surface is provided with second clamping structures of which the number is the same as that of the first clamping structures, and each first clamping structure is used for being matched and clamped with the second clamping structure on the other battery pack; and the height of each first clamping structure and / or each second clamping structure is smaller than that of the first connector and / or the second connector. When two adjacent battery packs are stacked, alignment installation is more accurate, connection is more stable, and accuracy and rapid installation of stacking of the two adjacent battery packs are achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of lithium batteries, and particularly relates to a battery pack, an energy storage device and a stacked household energy storage system. Background Art

[0002] With the update and upgrade of the energy system, energy storage technology is widely used in daily life and industrial production. However, the voltage of a single battery is relatively low and it is difficult to meet the existing usage requirements. In the prior art, multiple single batteries are connected in series to form a battery pack, and then multiple battery packs are connected in series or in parallel to form an energy storage system to increase the total energy storage capacity. However, in the energy storage system, the fixation between the stacked battery packs is rather troublesome, which is not conducive to the daily stacking and installation by people. Moreover, during the process of stacking multiple battery packs, it is difficult to ensure the alignment between two adjacent battery packs, and situations such as misalignment are likely to occur, affecting the assembly efficiency and assembly accuracy. Therefore, it has become an urgent problem to design a household energy storage system that is convenient for assembly and facilitates the alignment of battery packs. Summary of the Utility Model

[0003] Based on this, in view of the above technical problems, it is necessary to provide a battery pack, an energy storage device and a stacked household energy storage system.

[0004] A battery pack, the battery pack has a first surface and a second surface opposite to the first surface, a first connector is provided on the first surface, a second connector is provided on the second surface, and the first connector is used for plugging and unplugging connection with the second connector of another battery pack; at least one first clamping structure is further provided on the first surface, and a second clamping structure with the same number as the first clamping structure is provided on the second surface, and each first clamping structure is used for cooperating and clamping with the second clamping structure on another battery pack; the height of each first clamping structure and / or the second clamping structure is less than the height of the first connector and / or the second connector.

[0005] In one embodiment, a positioning member is further provided on the first surface around the first connector, a groove is formed on the second surface, the second connector is arranged in the groove, and the positioning member is used for being clamped in the groove; the height of the first connector and / or the second connector is less than the height of the positioning member.

[0006] In one embodiment, the positioning member includes a supporting portion and a buffering portion, the first end of the supporting portion is fixedly installed on the first surface, the buffering portion is arranged at the second end of the supporting portion away from the first surface, and the buffering portion is used for buffering the force along the height direction of the battery pack when two battery packs are stacked.

[0007] In one embodiment, at least two of the first latching structures are provided on the first surface of the battery pack, and the same number of second latching structures as that of the first latching structures are provided on the second surface of the battery pack. The heights of multiple first latching structures and / or second latching structures decrease one by one along a first direction of the first surface.

[0008] In one embodiment, the first latching structure and the second latching structure are configured as follows:

[0009] The first latching structure is a latching member protruding from opposite sides of the first surface, and the second latching structure is a slot recessed in the second surface. The position of the slot corresponds to the position of the latching member, and the latching member is snapped into the slot;

[0010] Or, the first latching structure is a slot recessed in the first surface, and the second latching structure is a latching member protruding from opposite sides of the second surface. The position of the slot corresponds to the position of the latching member, and the latching member is snapped into the slot.

[0011] In one embodiment, a first threaded hole for a bolt to pass through is formed in the latching member, and a second threaded hole is formed in the battery pack at a corresponding position. The bolt is fixedly inserted into the first threaded hole and the second threaded hole.

[0012] In one embodiment, a plurality of receiving holes are respectively provided in the first connector and the second connector, and the receiving holes are used to receive the power terminals and signal terminals of the battery pack.

[0013] An energy storage device includes: a base and at least two battery packs as described in any one of the above embodiments. Each battery pack is stacked on the base. A first surface of one battery pack abuts against a second surface of an adjacent battery pack, and a first connector of one battery pack is plugged and unplugged with a second connector of an adjacent battery pack, and a first latching structure of one battery pack is cooperatively latched with a second latching mechanism of an adjacent battery pack.

[0014] In one embodiment, the base has a first abutting surface for abutting against the first surface or the second surface of an adjacent battery pack;

[0015] The base is configured as follows:

[0016] A third connector and a third latching structure are provided on the first abutting surface of the base. The third connector is used to be plugged and unplugged with a first connector on the first surface of an adjacent battery pack, and the third latching structure is used to be cooperatively latched with the first latching structure of an adjacent battery pack;

[0017] Or,

[0018] A fourth connector and a fourth latching structure are provided on the first abutting surface of the base. The fourth connector is used for plugging and unplugging connection with the second connector on the second surface of the adjacent battery pack, and the fourth latching structure is used for cooperating with the second latching structure of the adjacent battery pack for latching.

[0019] A stacked household energy storage system, characterized in that it includes a high-voltage box device and the above-mentioned energy storage device, and the high-voltage box device and two adjacent abutting surfaces of the battery pack are connected through the connecting mechanism.

[0020] In one embodiment, it includes a high-voltage box device and the above-mentioned energy storage device. The high-voltage box device is arranged on the other side away from the side where the base is located. The high-voltage box device is provided with a second abutting surface, and the second abutting surface is used for abutting against the first surface or the second surface of the adjacent battery pack;

[0021] The high-voltage box device is configured as:

[0022] A fifth connector and a fifth latching structure are provided on the second abutting surface of the high-voltage box device. The fifth connector is used for plugging and unplugging connection with the first connector on the first surface of the adjacent battery pack, and the fifth latching structure is used for cooperating with the first latching structure of the adjacent battery pack for latching;

[0023] Or,

[0024] A sixth connector and a sixth latching structure are provided on the second abutting surface of the high-voltage box device. The sixth connector is used for plugging and unplugging connection with the second connector on the second surface of the adjacent battery pack, and the sixth latching structure is used for cooperating with the second latching structure of the adjacent battery pack for latching.

[0025] For the above-mentioned battery pack, energy storage device and stacked household energy storage system, a first connector and at least a first latching structure are provided on the first surface of the battery pack, and a second connector and a second latching structure are provided on the second surface. When stacking the battery packs, through the plugging and unplugging connection of the first connector and the second connector provided between the first surface and the second surface of two adjacent battery packs, and the latching of the first latching structure and the second latching mechanism, so that multiple battery packs can be quickly connected during stacking installation, and play a good guiding role during alignment, ensuring more accurate alignment and more stable connection when two adjacent battery packs are stacked, realizing the accuracy and quick installation of the stacking of two adjacent battery packs, improving the assembly efficiency of the energy storage device, and facilitating household use. Description of the Drawings

[0026] Figure 1Schematic diagram of the structure of a battery pack in an embodiment;

[0027] Figure 2 is Figure 1 an enlarged view of part A of

[0028] Figure 3 Schematic diagram of the structure of the battery pack in another direction in an embodiment;

[0029] Figure 4 Stacked household energy storage system in an embodiment;

[0030] Figure 5 Schematic diagram of the structure of a base in an embodiment;

[0031] Figure 6 Schematic diagram of the structure of a high-voltage box device in an embodiment.

[0032] Reference numeral description:

[0033] 100 - battery pack; 101 - first surface; 102 - second surface; 110 - first connector; 120 - second connector; 130 - first clamping structure; 140 - second clamping structure; 150 - positioning member; 160 - groove; 151 - supporting portion; 152 - buffering portion; 131 - first clamping member; 141 - first clamping groove; 132 - second clamping member; 142 - second clamping groove; 200 - base; 201 - first abutting surface; 210 - third connector; 220 - third clamping structure; 300 - high-voltage box device; 301 - second abutting surface; 310 - fifth connector; 320 - fifth clamping structure. Detailed implementation manners

[0034] For the convenience of understanding the present application, in order to make the above-mentioned objects, features and advantages of the present application more obvious and understandable, the following will describe the specific embodiments of the present application in detail with reference to the accompanying drawings. Many specific details are set forth in the following description in order to fully understand the present application, and the preferred embodiments of the present application are given in the drawings. However, the present application can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, these embodiments are provided so that the disclosure of the present application can be understood more thoroughly and comprehensively. The present application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without departing from the connotation of the present application. Therefore, the present application is not limited by the specific embodiments disclosed below. In addition, the terms "first" and "second" are used for descriptive purposes only and cannot be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present application, the meaning of "a plurality" is at least two, such as two, three, etc., unless otherwise specifically defined. In the description of the present application, the meaning of "several" is at least one, such as one, two, etc., unless otherwise specifically defined. It should be noted that when an element is referred to as being "fixed to" another element, it can be directly on the other element or there may also be an intermediate element. When an element is considered to be "connected" to another element, it can be directly connected to the other element or there may be an intermediate element at the same time. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for illustrative purposes only and do not represent the only embodiments. Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the technical field to which this application belongs. The terms used herein are only for the purpose of describing specific embodiments and are not intended to limit the present application. The term "and / or" used herein includes any and all combinations of one or more of the related listed items.

[0035] Embodiment 1

[0036] In this embodiment, as Figures 1 to 3As shown, a battery pack 100 is provided. The battery pack 100 has a first surface 101 and a second surface 102 opposite to the first surface 101. A first connector 110 is provided on the first surface 101, and a second connector 120 is provided on the second surface 102. The first connector 110 is used for plugging and unplugging connection with the second connector 120 of another battery pack 100; at least one first clamping structure 130 is further provided on the first surface 101, and a second clamping structure 140 with the same number as the first clamping structure 130 is provided on the second surface 102. Each first clamping structure 130 is used for cooperating with the second clamping structure 140 on another battery pack 100 for clamping connection; the height of each first clamping structure 130 and / or the second clamping structure 140 is less than the height of the first connector 110 and / or the second connector 120.

[0037] In this embodiment, the number of the first clamping structures 130 can be set to two. Correspondingly, the number of the second clamping structures 140 is also two. The heights of the two first clamping structures 130 and / or the second clamping structures are all less than the heights of the first connector 110 and / or the second connector 120. In this way, when multiple battery packs are stacked, first, the first connector 110 and the second connector 120 are plugged, and then, each first clamping structure 130 and the corresponding second clamping mechanism 140 are clamped to achieve the stability of the connection of the stacked battery packs 100.

[0038] In this embodiment, when multiple battery packs 100 are stacked, through the plugging and unplugging connection of the first connector 110 and the second connector 120 provided between the first surface 101 and the second surface 102 of two adjacent battery packs 100 that are close to each other, and the clamping connection of the first clamping structure 130 and the second clamping mechanism 140, so that multiple battery packs 100 can be quickly connected during stacked installation, and play a good guiding role during alignment, ensuring more accurate alignment installation and more stable connection when two adjacent battery packs are stacked, achieving the accuracy and quick installation of the stacking of two adjacent battery packs, improving the assembly efficiency of the energy storage device, and being convenient for household use.

[0039] In one embodiment, referring to Figure 1 and Figure 2 As shown, a positioning member 150 is further provided on the first surface 101 around the first connector 110. A groove 160 is formed on the second surface 102, and the second connector 120 is disposed in the groove 160. The positioning member 150 is used for being clamped in the groove 160; the height of the first connector 110 and / or the second connector 120 is less than the height of the positioning member 150.

[0040] In one embodiment, there are two positioning members 150 located on opposite sides of the first connector 110. When the battery packs 100 are stacked, the two positioning members 150 are first snapped into the grooves 160 to provide guidance for the insertion of the first connector 110 and the second connector 120. Moreover, the two arranged positioning members 150 ensure balanced force application and prevent the battery packs 10 from tipping over during the stacking process.

[0041] In this embodiment, when stacking multiple battery packs, since the height of the positioning member 150 is greater than that of the first connector 110 and the second connector 120, the positioning member 150 is first snapped into the groove 160 to provide primary guidance for the connection of adjacent two battery packs 100, and improve the alignment accuracy of the stacking of the two battery packs 100, facilitating the subsequent docking of the first connector 110 and the second connector 120; then the first connector 110 and the second connector 120 are plugged and unplugged to achieve secondary guidance for the stacking of the two battery packs 100, further improving the alignment accuracy of the two battery packs 100; finally, through the mutual cooperation and snapping of the first latching structure 130 and the second latching structure 140, tertiary guidance for the connection of adjacent two battery packs 100 is provided, and the stacking connection of the two battery packs 100 is achieved.

[0042] In one of the embodiments, referring to Figure 2 As shown, the positioning member 150 includes a support portion 151 and a buffer portion 152. The first end of the support portion 151 is fixedly installed on the first surface 101, and the buffer portion 152 is provided at the second end of the support portion 151 away from the first surface 101. The buffer portion 152 is used to buffer the force in the height direction of the battery pack 100 when the two battery packs 100 are stacked.

[0043] In one embodiment, the buffer portion 152 is a contact plate provided at the end of the support portion 151 and extending in a direction perpendicular to the height direction of the support portion 151. One end of the contact plate away from the support portion 151 can swing relatively in the height direction of the battery pack 100. Thus, during the process of the upper battery pack 100 stacking downward, the support structure swings in the stacking direction, thereby buffering the force in the height direction of the battery pack 100 and preventing damage to the battery pack during the stacking process.

[0044] In one of the embodiments, at least two first latching structures 130 are provided on the first surface 101 of the battery pack 100, and the same number of second latching structures 140 as that of the first latching structures 130 are provided on the second surface 102 of the battery pack 100. The heights of multiple first latching structures 130 and / or second latching structures 140 decrease one by one along the first direction of the first surface 101.

[0045] In one embodiment, the number of the first latching structures 130 may be set to two. Correspondingly, the number of the second latching structures 140 is also two. The heights of both the two first latching structures 130 and / or the second latching structures are less than the height of the first connector 110 and / or the second connector 120, and the height of the first latching structure 130 and / or the second latching structure 140 in one group is less than the height of the first latching structure 130 and / or the second latching structure 140 in the other group. In this way, during the stacking process of the battery pack 100, the height of the first latching mechanism 130 and / or the second latching structure 140 decreases between each group. When the battery pack 100 located above is stacked onto the battery pack 100 below, it is latched and fixed in sequence through the first latching structures 130 and the second latching mechanisms 140 with different heights, ultimately ensuring the alignment of the two stacked battery packs 100.

[0046] In one of the embodiments, refer to Figure 1 and Figure 3 As shown, the first latching structure 130 and the second latching structure 140 are configured such that the first latching structure 130 is a latching member protruding from opposite sides of the first surface 101, and the second latching structure 140 is a card slot recessed in the second surface 102. The position of the card slot corresponds to the position of the latching member, and the latching member is engaged in the card slot.

[0047] In one embodiment, the first latching structure 130 is a latching member protruding from both sides of the first surface 101 along the width direction, and the second latching structure 140 is a card slot recessed in the second surface. The position of the card slot corresponds to the position of the latching member.

[0048] In one embodiment, the first latching structure 130 is a latching member protruding from both sides of the first surface 101 along the length direction, and the second latching structure 140 is a card slot recessed in the second surface. The position of the card slot corresponds to the position of the latching member.

[0049] In one embodiment, the first latching structure 130 is a latching member protruding from two vertex positions of the first surface 101 along the diagonal direction, and the second latching structure 140 is a card slot recessed in the second surface. The position of the card slot corresponds to the position of the latching member.

[0050] In one of the embodiments, the first latching structure 130 and the second latching structure 140 are configured such that the first latching structure 130 is a card slot recessed in the first surface 101, and the second latching structure 140 is a latching member protruding from opposite sides of the second surface 102. The position of the card slot corresponds to the position of the latching member, and the latching member is engaged in the card slot.

[0051] In this embodiment, the connection stability of multiple stacked battery packs is achieved through the cooperation and clamping of the clamping members and the clamping grooves.

[0052] In one embodiment, the number of the first clamping structures 130 is set to two, and correspondingly, the number of the first clamping structures 140 is also two. Among them, the first clamping structures in the first group are two first clamping members 131 arranged along the width direction of the battery pack on the first surface 101, and the second clamping structure in the first group is the first clamping groove 141 corresponding to the position of the clamping member. The first clamping structures in the second group are two second clamping members 132 arranged at the two vertex positions along the diagonal direction on the first surface 101; the second clamping structure in the second group is the first clamping groove 142 corresponding to the position of the clamping member.

[0053] Specifically, the first clamping structures in the first group are clamping pieces, and the abutting surfaces of the first clamping structures in the first group and the second clamping structures are large enough to ensure the connection stability. In one embodiment, there are two clamping pieces along the width direction of the first surface, and they are symmetrically arranged on both sides of the length direction of the first surface. In one embodiment, the first clamping structures in the second group are positioning pin structures, and correspondingly, the second clamping structures in the second group are positioning holes.

[0054] In this embodiment, it is defined that the maximum height of the first connector 110 and the second connector 120 is H, the height of the positioning member 150 is h1, the height of the first clamping member 131 is h2, the height h2 of the first clamping member 131 is less than the height h1 of the positioning member 150, the height of the second clamping member 132 is h3, and the height h3 of the second clamping member 132 is less than the height h2 of the first clamping member 131. When the battery packs 100 are stacked, along the height direction, when the upper battery pack 100 is stacked downward onto the lower battery pack 100, the positioning member 150 first cooperates with the groove 160 for clamping to avoid the first connector 110 or the second connector 120 from being stressed, and provides guidance for the insertion of the first connector 110 and the second connector 120; when the upper battery pack 100 continues to move downward by a distance of h1 - H, the first connector 110 and the second connector 120 are inserted to achieve the alignment of the two battery packs 100 and provide support for the fixation between the two battery packs 100; then when the upper battery pack 100 continues to move downward by a distance of H - h2, the first clamping member 131 is clamped in the first clamping groove 141 to achieve the connection stability of two adjacent battery packs 100; when the upper battery pack 100 continues to move downward by a distance of h2 - h3, the second clamping member 132 is clamped in the second clamping groove 141, and finally the mutual stacking of the two battery packs 100 is achieved, ensuring the stacking alignment and connection stability.

[0055] In one embodiment, a first threaded hole for a bolt to pass through is formed in the clamping member, and a second threaded hole is formed in the battery pack 100 at a corresponding position. The bolt is fixedly arranged by passing through the first threaded hole and the second threaded hole.

[0056] In this embodiment, the number of the first clamping structures 130 is set to two, and correspondingly, the number of the first clamping structures 140 is also two. Among them, the first clamping structures in the first group are two first clamping members 131 arranged along the width direction of the battery pack on the first surface 101, and the second clamping structures in the first group are first clamping grooves 141 corresponding to the positions of the clamping members. The first clamping structures in the second group are two second clamping members 132 at two vertex positions arranged along the diagonal direction on the first surface 101; the second clamping structures in the second group are first clamping grooves 142 corresponding to the positions of the clamping members.

[0057] In one embodiment, a first threaded hole for a bolt to pass through is formed in the first clamping member 131, and a second threaded hole is formed in the battery pack 100 at a corresponding position. The bolt is fixedly arranged by passing through the first threaded hole and the second threaded hole.

[0058] In one embodiment, a first threaded hole for a bolt to pass through is formed in the second clamping member 132, and a second threaded hole is formed in the battery pack 100 at a corresponding position. The bolt is fixedly arranged by passing through the first threaded hole and the second threaded hole.

[0059] In one embodiment, first threaded holes for bolts to pass through are formed in both the first clamping member 131 and the second clamping member 132, and second threaded holes are formed in the battery pack 100 at corresponding positions. One bolt is fixedly arranged by passing through the first threaded hole of the first clamping member 131 and the second threaded hole on the battery pack 100; the other bolt is fixedly arranged by passing through the first threaded hole of the second clamping member 132 and the second threaded hole on the battery pack 100.

[0060] In this embodiment, the bolts are arranged in the first threaded hole and the second threaded hole to ensure the stability of the connection of the battery pack 100.

[0061] In one embodiment, a plurality of receiving holes are respectively formed in the first connector 110 and the second connector 120, and the receiving holes are used to receive the power terminals and signal terminals of the battery pack 100.

[0062] In this embodiment, through the precise insertion of the first connector 110 and the second connector 120, the precise connection of the internal electrical terminals and signal terminals of the battery pack 100 is realized, so that conventional cables do not need to be used, the complexity of wiring is reduced, and the risk of missed connection / wrong connection is reduced.

[0063] Embodiment 2

[0064] In this embodiment, an energy storage device is provided, including: a base 200 and at least the battery pack 100 described in any one of the above embodiments. Each battery pack 100 is stacked on the base 100. The first surface 101 of one battery pack 100 abuts against the second surface 102 of an adjacent battery pack 100. The first connector 110 of one battery pack 100 is plugged and unplugged with the second connector 120 of an adjacent battery pack 100, and the first latching structure 130 of one battery pack 100 cooperates with the second latching mechanism 140 of an adjacent battery pack 100 for latching.

[0065] In this embodiment, the first connector 110 of each battery pack 100 is plugged and unplugged with the second connector 120 of an adjacent battery pack 100 to achieve electrical connection between the two.

[0066] In some embodiments, stacking arrangements of any number of battery packs 100 can be achieved according to actual needs to facilitate increasing or decreasing the battery capacity and enrich the applicable scenarios of the energy storage device. In this embodiment, as Figure 4 shown, an example is given with the number of stacked battery packs 100 being 5.

[0067] In one embodiment, when the number of battery packs 100 is two, the first surface 101 can be located on the lower surface of one battery pack 100, and the second surface 102 can be located on the upper surface of the other battery pack 100. Alternatively, the first surface 101 is located on the upper surface of one battery pack 100, and the second surface 102 is located on the upper surface of the other battery pack 100.

[0068] In one embodiment, when the number of battery packs 100 is three or more, the upper surface of each battery pack 100 is defined as the first surface 101, and the lower surface is defined as the second surface 102. The upper surface of each battery pack 100 abuts against the lower surface of another battery pack 100. In this way, through the plugging and unplugging connection of the first connector 110 and the second connector 120 between the first surface 101 and the second surface 102, and the latching of at least one first latching structure 120 and second latching structure 130, the stacked connection of multiple battery packs 100 is achieved.

[0069] In this embodiment, when stacking multiple battery packs, since the height of the positioning member 150 is greater than the heights of the first connector 110 and the second connector 120, the positioning member 150 is first snapped into the groove 160, providing a primary guidance for the connection of two adjacent battery packs 100, and improving the alignment accuracy of the stacking of the two battery packs 100, facilitating the subsequent docking of the first connector 110 and the second connector 120; then the first connector 110 and the second connector 120 are plugged and unplugged to realize the secondary guidance for the stacking of the two battery packs 100, further improving the alignment accuracy of the two battery packs 100; finally, through the mutual cooperation and snapping of the first snap structure 130 and the second snap structure 140, a tertiary guidance is provided for the connection of two adjacent battery packs 100, and the stacking connection of the two battery packs 100 is realized.

[0070] For the above energy storage device, when stacking multiple battery packs 100, through the plugging and unplugging connection of the first connector 110 and the second connector 120 provided between the first surface 101 and the second surface 102 of two adjacent battery packs 100 that are close to each other, and the snapping of the first snap structure 130 and the second snap mechanism 140, the multiple battery packs 100 can be quickly connected during stacking installation, and play a good guiding role during alignment, ensuring more accurate alignment installation and more stable connection when two adjacent battery packs are stacked, realizing the accuracy and quick installation of the stacking of two adjacent battery packs, improving the assembly efficiency of the energy storage device, and facilitating household use.

[0071] In one embodiment, refer to Figure 5 As shown, the base 200 has a first abutting surface 201, and the first abutting surface 201 is used to abut against the first surface 101 or the second surface 102 of the adjacent battery pack 100.

[0072] In one embodiment, the base is configured such that: a third connector and a third snap structure are provided on the first abutting surface of the base, the third connector is used for plugging and unplugging connection with the first connector on the first surface of the adjacent battery pack, and the third snap structure is used for cooperating and snapping with the first snap structure of the adjacent battery pack.

[0073] In one embodiment, continue to refer to Figure 5 As shown, the base 200 is configured such that: a fourth connector 210 and a fourth snap structure 220 are provided on the first abutting surface 201 of the base 200, the fourth connector 210 is used for plugging and unplugging connection with the second connector 120 on the second surface 102 of the adjacent battery pack 100, and the fourth snap structure 220 is used for cooperating and snapping with the second snap structure 140 of the adjacent battery pack 100.

[0074] Embodiment III

[0075] In this embodiment, as Figures 4 to 6 shown, a stacked household energy storage system is provided, including a high-voltage box device 300 and the energy storage device described in any of the above embodiments. The high-voltage box device 300 is disposed on the other side away from the side where the base 200 is located. The high-voltage box device 300 is provided with a second abutting surface 301, and the second abutting surface 301 is used to abut against the first surface 101 or the second surface 102 of the adjacent battery pack 100;

[0076] In one embodiment, referring to Figure 6 shown, the high-voltage box device 300 is configured such that a fifth connector 310 and a fifth latching structure 320 are provided on the second abutting surface of the high-voltage box device. The fifth connector 310 is used for plugging and unplugging connection with the first connector 110 on the first surface 101 of the adjacent battery pack 100, and the fifth latching structure 320 is used for cooperating with the first latching structure 130 of the adjacent battery pack 101 for latching connection.

[0077] In one embodiment, the high-voltage box device is configured such that a sixth connector and a sixth latching structure are provided on the second abutting surface of the high-voltage box device. The sixth connector is used for plugging and unplugging connection with the second connector on the second surface of the adjacent battery pack, and the sixth latching structure is used for cooperating with the second latching structure of the adjacent battery pack for latching connection.

[0078] In one of the embodiments, the high-voltage box device 300 is provided with at least two interfaces. One of the interfaces is used for parallel connection with an adjacent stacked household energy storage system, and one of the interfaces is used for connection with an inverter.

[0079] In one embodiment, one interface of the high-voltage box device is used for parallel connection with an adjacent stacked household energy storage system to achieve a larger energy storage capacity or a backup power system. When the capacity of a single energy storage system is insufficient to meet the requirements, the total energy storage capacity and output power of the system can be significantly increased through parallel connection; one of the interfaces of the high-voltage box device is used for connection with an inverter to realize the charge and discharge control of the energy storage system.

[0080] The technical features of the above-described embodiments can be combined arbitrarily. For the sake of brevity of description, not all possible combinations of the various technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, it should be considered to be within the scope described in this specification. It should be noted that "in one embodiment of the present application", "for example", "again, for example", etc. are intended to illustrate the present application, rather than to limit the present application. The above-described embodiments only express several implementation manners of the present application, and their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of the patent application. It should be pointed out that for those of ordinary skill in the art, without departing from the concept of the present application, several deformations and improvements can still be made, and these all belong to the protection scope of the present application. Therefore, the protection scope of the patent of the present application shall be subject to the appended claims.

Claims

1. A battery pack, characterized in that: The battery pack has a first surface and a second surface opposite to the first surface, the first surface is provided with a first connector, the second surface is provided with a second connector, the first connector is used for plugging and unplugging connection with the second connector of another battery pack; at least one first clip structure is also provided on the first surface, the second surface is provided with the same number of second clip structures as the first clip structures, each of the first clip structures is used for cooperating and clipping with the second clip structure on another battery pack; the height of each of the first clip structures and / or the second clip structures is less than the height of the first connector and / or the second connector.

2. The battery pack according to claim 1, characterized in that: The first surface is also provided with a positioning piece on the peripheral side of the first connector, and the second surface is provided with a groove, the second connector is arranged in the groove, and the positioning piece is used to be clamped in the groove; the height of the first connector and / or the second connector is less than the height of the positioning piece.

3. The battery pack according to claim 2, characterized in that: The positioning member includes a supporting portion and a buffer portion, wherein the first end of the supporting portion is fixedly mounted on the first surface, and the buffer portion is disposed at the second end of the supporting portion away from the first surface, and the buffer portion is used to buffer the force along the height direction of the battery pack when two battery packs are stacked.

4. The battery pack according to claim 1, characterized in that: At least two first clamping structures are provided on the first surface of the battery pack, and the second clamping structures are provided on the second surface of the battery pack in the same number as the first clamping structures, and the heights of the plurality of first clamping structures and / or second clamping structures decrease one by one along the first direction of the first surface.

5. The battery pack according to claim 1, characterized in that: The first clamping structure and the second clamping structure are configured as follows: The first clamping structure is a clamping member protruding from two opposite sides of the first surface, and the second clamping structure is a clamping groove recessed from the second surface, the position of the clamping groove corresponds to the position of the clamping member, and the clamping member is clamped in the clamping groove; Alternatively, the first clamping structure is a clamping slot recessed in the first surface, the second clamping structure is a clamping member protruding on opposite sides of the second surface, the position of the clamping slot corresponds to the position of the clamping member, and the clamping member is clamped in the clamping slot.

6. The battery pack according to claim 5, characterized in that: The clamping member is provided with a first threaded hole for a bolt to pass through, and the battery pack is provided with a second threaded hole at a corresponding position, and the bolt is passed through and fixed in the first threaded hole and the second threaded hole.

7. The battery pack according to claim 1, characterized in that: A plurality of accommodating holes are respectively provided in the first connector and the second connector, and the accommodating holes are used to accommodate power terminals and signal terminals of the battery pack.

8. An energy storage device, characterized in that: include: A base and at least two battery packs according to any one of claims 1 to 7, wherein each of the battery packs is stacked on the base, the first surface of one of the battery packs abuts against the second surface of another adjacent battery pack, and the first connector of one of the battery packs is pluggably connected to the second connector of another adjacent battery pack, and the first clamping structure of one of the battery packs is engaged with the second clamping structure of another adjacent battery pack.

9. The energy storage device according to claim 8, characterized in that: The base has a first abutting surface, and the first abutting surface is used to abut against the first surface or the second surface of the adjacent battery pack; The base is configured as: A third connector and a third clamping structure are provided on the first abutting surface of the base, the third connector is used for plugging and unplugging with the first connector on the first surface of the adjacent battery pack, and the third clamping structure is used for cooperating and clamping with the first clamping structure of the adjacent battery pack; or, A fourth connector and a fourth snap-in structure are provided on the first abutting surface of the base, the fourth connector is used for plugging and unplugging with the second connector on the second surface of the adjacent battery pack, and the fourth snap-in structure is used for cooperating and snap-in with the second snap-in structure of the adjacent battery pack.

10. A stacked household energy storage system, characterized in that: A high-voltage box device and an energy storage device according to any one of claims 8 to 9, wherein the high-voltage box device is arranged on the other side away from the side where the base is located, and the high-voltage box device is provided with a second abutting surface, and the second abutting surface is used to abut against the first surface or the second surface of the adjacent battery pack; The high voltage box device is configured as follows: A fifth connector and a fifth clamping structure are provided on the second abutting surface of the high-voltage box device, wherein the fifth connector is used for plugging and unplugging with the first connector on the first surface of the adjacent battery pack, and the fifth clamping structure is used for cooperating and clamping with the first clamping structure of the adjacent battery pack; or, A sixth connector and a sixth clamping structure are provided on the second abutting surface of the high-voltage box device, the sixth connector is used for plugging and unplugging with the second connector on the second surface of the adjacent battery pack, and the sixth clamping structure is used for cooperating and clamping with the second clamping structure of the adjacent battery pack.

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