Battery pack and energy storage device

Abstract

The invention relates to a battery pack and an energy storage device. The battery pack comprises a shell, a battery module, a first bracket and a second bracket, the shell is provided with a first containing cavity and a first opening which are communicated, the battery module is installed on the shell and located in the first containing cavity, the first support is installed on the shell and located in the first containing cavity, the second support is movably connected with the first support, and the battery management unit is installed on the second support. And at least part of the structure of the second bracket and at least part of the structure of the battery management unit can move through the first opening between the inside of the first accommodating cavity and the outside of the first accommodating cavity. In addition, if at least part of the structure of the battery management unit can be located in a large space outside the first containing cavity, the large space facilitates the user to maintain the battery management unit, the operation difficulty is low when the user maintains the battery management unit, and the labor intensity of the user is low.

Description

Technical Field

[0001] The present application relates to the field of energy storage technology, and in particular to a battery pack and an energy storage device. Background Art

[0002] The storage space of the battery pack can accommodate the battery module, the battery management unit (BMU) and the mounting bracket. The battery management unit is installed on the housing of the battery pack through the mounting bracket, and the housing has an opening to expose the battery management unit. Since the storage space of the battery pack is small, when the user maintains the battery management unit in the storage space through the opening, the corresponding operation is difficult and the maintenance efficiency is low. Summary of the invention

[0003] In view of this, the present application provides a battery pack and an energy storage device, which have the advantage of facilitating user maintenance of the battery management unit.

[0004] In a first aspect, the present application provides a battery pack, which includes a shell, a battery module, a first bracket, and a second bracket. The shell is provided with a first accommodating cavity and a first opening that are connected to each other, the battery module is mounted on the shell and is located in the first accommodating cavity, the first bracket is mounted on the shell and is located in the first accommodating cavity, the second bracket is movably connected to the first bracket, the battery management unit is mounted on the second bracket, and at least part of the structure of the second bracket and at least part of the structure of the battery management unit can move between the inside and outside of the first accommodating cavity through the first opening.

[0005] For the user, when the second bracket and the battery management unit are located in the first accommodating cavity, and the user needs to maintain the battery management unit, the user can operate the second bracket to move relative to the first bracket, so that at least part of the structure of the second bracket and at least part of the structure of the battery management unit move from the first accommodating cavity through the first opening to a position outside the first accommodating cavity. Since at least part of the structure of the second bracket and at least part of the structure of the battery management unit can be located in a larger space outside the first accommodating cavity, the larger space is convenient for the user to maintain the battery management unit, and the larger space is also convenient for the user to remove the battery management unit from the second bracket and reinstall the battery management unit to the second bracket. After the user maintains the battery management unit and intuitively confirms that the battery management unit is stably installed on the second bracket, the user can move the second bracket and the battery management unit located outside the first accommodating cavity back to the first accommodating cavity through the first opening.

[0006] Compared with the fixed bracket for installing the battery management unit in the battery pack of the prior art, the bracket (including the first bracket and the second bracket) of the battery pack of the present application is a movable structure. The movable bracket reduces the difficulty of operation for the user when maintaining the battery management unit, and the labor intensity of the user is lower.

[0007] Optionally, the first bracket is rotatably connected to the second bracket, or the first bracket is telescopically connected to the second bracket.

[0008] Optionally, when the first bracket is rotatably connected to the second bracket, the rotation axis of the first rotation pair between the first bracket and the second bracket is perpendicular to the height direction of the battery pack, or the rotation axis of the first rotation pair between the first bracket and the second bracket is parallel to the height direction of the battery pack.

[0009] Optionally, when the first bracket is rotatably connected to the second bracket, the second bracket also includes a first structural member and a second structural member, the first structural member is rotatably connected to the first bracket, the first structural member is rotatably connected or telescopically connected to the second structural member, and at least one battery management unit is installed on the second structural member.

[0010] Optionally, when the first structural member is rotationally connected to the second structural member, the second structural member can rotate to a first position or a second position relative to the first structural member. In the first position, the first structural member and the second structural member are in a folded state, and in the second position, the first structural member and the second structural member are in an unfolded state.

[0011] Optionally, when the second bracket is located in the first accommodating cavity, the second structural member is located on a side of the first structural member close to the battery module, or the second structural member is located on a side of the first structural member away from the battery module.

[0012] Optionally, at least one battery management unit is located between the first structure member and the second structure member, or at least one battery management unit is located on a side of the second structure member facing away from the first structure member.

[0013] Optionally, when the first bracket is telescopically connected to the second bracket, the first bracket and the second bracket are connected via a diamond-shaped folding frame, or the first bracket and the second bracket are connected via a telescopic rod.

[0014] Optionally, when the second bracket is in the first accommodating cavity, the first bracket is also connected to the second bracket in a limiting manner to limit the movement of the second bracket relative to the first bracket, and / or, when at least part of the structure of the second bracket is outside the first accommodating cavity, the first bracket is also connected to the second bracket in a limiting manner to limit the movement of the second bracket relative to the first bracket.

[0015] In a second aspect, the present application provides an energy storage device, which includes an inverter, a battery management system, and at least one battery pack described above. The energy storage device of the present application also includes the technical effects of the battery pack described above, which will not be repeated here.

[0016] It should be understood that the foregoing general description and the following detailed description are exemplary only and are not restrictive of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0018] Figure 1 A schematic diagram of the structure of a battery pack provided in this application in a specific embodiment; Figure 2 for Figure 1 Schematic diagram of the explosion structure of the battery pack; Figure 3 is a schematic diagram of a partial cross-sectional structure of a battery pack in a specific embodiment, wherein the second bracket and the battery management unit are in the first accommodation cavity; Figure 4 is a schematic diagram of a partial cross-sectional structure of a battery pack in a specific embodiment, wherein at least a portion of the structure of the second bracket and at least a portion of the structure of the battery management unit are outside the first accommodating cavity; Figure 5~Figure 6 It is a schematic diagram of the structure of the first bracket and the second bracket in a specific embodiment; Figure 7~Figure 8 is a schematic structural diagram of a first bracket and a second bracket in another specific embodiment; Figure 9~Figure 11 It is a schematic structural diagram of a first bracket, a first structural member and a second structural member in a specific embodiment; Figure 12 to Figure 18 It is a schematic structural diagram of a first bracket, a first structural member, a second structural member and a battery management unit in a specific embodiment; Fig.19 is a schematic diagram of a partial cross-sectional structure of the first rotating pair; Fig. 20 is a schematic diagram of a partial cross-sectional structure of a second bracket; Fig.21 is a schematic diagram of a partial cross-sectional structure of a battery pack in another specific embodiment, wherein the second bracket and the battery management unit are in the first accommodation cavity; Fig. 22 is a schematic diagram of a partial cross-sectional structure of a battery pack in another specific embodiment, wherein at least a portion of the structure of the second bracket and at least a portion of the structure of the battery management unit are outside the first accommodating cavity; Fig.23 is a schematic structural diagram of a first bracket, a second bracket and a diamond-shaped folding bracket in a specific embodiment, wherein the diamond-shaped folding bracket is in a folded state; Fig.24is a schematic structural diagram of a first bracket, a second bracket and a diamond-shaped folding frame in a specific embodiment, wherein the diamond-shaped folding frame is in an extended state; Fig.25 is a schematic structural diagram of a first bracket, a second bracket and a telescopic rod in a specific embodiment, wherein the telescopic rod is in a retracted state; Fig.26 is a schematic structural diagram of a first bracket, a second bracket and a telescopic rod in a specific embodiment, wherein the telescopic rod is in an extended state; Fig. 27 It is a structural schematic diagram of an energy storage box in a specific embodiment; Fig.28 It is a schematic diagram of the structure of an energy storage cabinet in a specific embodiment.

[0019] 10-Battery pack; 1- housing; 1a-first accommodating chamber; 11- bottom plate; 12-top cover; 121-first opening; 13- Panel; 2-Battery module; 3a- first rotating pair; 3b- the second rotation pair; 3c-diamond folding frame; 3d-telescopic rod; 31- first bracket; 32- second bracket; 321- first structural member; 321a- second accommodating chamber; 321b-second opening; 321c-third opening; 322- second structural member; 4-Battery Management Unit. DETAILED DESCRIPTION

[0020] In order to better understand the technical solution of the present application, the embodiments of the present application are described in detail below with reference to the accompanying drawings.

[0021] It should be clear that the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in the field without creative work are within the protection scope of the present application.

[0022] The terms used in the embodiments of the present application are only for the purpose of describing specific embodiments, and are not intended to limit the present application. The singular forms "a", "said" and "the" used in the embodiments of the present application and the appended claims are also intended to include plural forms, unless the context clearly indicates other meanings.

[0023] It should be understood that the term "and / or" used in this article is only a description of the association relationship of associated objects, indicating that there can be three relationships. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in this article generally indicates that the associated objects before and after are in an "or" relationship.

[0024] In a first aspect, an embodiment of the present application provides a battery pack, wherein the battery pack 10 is as follows: Figure 1 The battery pack 10 can be applied to energy storage boxes, mobile power supplies, vehicles or other devices that need to store electrical energy.

[0025] Please refer to Figure 2 As shown, the battery pack 10 includes a shell 1 and a battery module 2. The battery module 2 includes a plurality of electrically connected secondary batteries (not marked in the figure). A secondary battery is a rechargeable battery or a storage battery. A secondary battery refers to a battery that can be used continuously by activating the active material by charging after the battery is discharged. The electrical connection between the plurality of secondary batteries includes series connection, parallel connection or mixed connection, wherein mixed connection refers to both series connection and parallel connection among the plurality of secondary batteries. The plurality of secondary batteries can be arranged side by side along the length direction of the battery pack 10 (for example, direction X), or can be arranged side by side along the width direction of the battery pack 10 (for example, direction Y).

[0026] In other embodiments, a plurality of secondary batteries may be connected in series, in parallel or in hybrid connection to form a battery module, and the plurality of battery modules may be connected in series, in parallel or in hybrid connection to form a whole, which is then accommodated in the housing 1 .

[0027] The battery module 2 also includes a frame structure (not marked in the figure), which may include an end plate structure, a side structure plate, a top plate structure and a bottom plate structure that are interconnected. Multiple secondary batteries are located in the inner cavity of the frame structure and are stacked on each other in the inner cavity of the frame structure. The stacking direction may be the length direction, the width direction or the height direction.

[0028] The battery module 2 further includes a busbar component, which is used to realize electrical connection between the plurality of secondary batteries.

[0029] The secondary battery may be cylindrical, flat, rectangular or in other shapes.

[0030] Please refer to Figure 3As shown, the battery pack 10 further includes a first bracket 31, a second bracket 32 ​​and a battery management unit 4 (Battery Management Unit, BMU). Figure 3 As shown, the housing 1 is provided with a first accommodating cavity 1a and a first opening 121 that are connected to each other, the battery module 2 is mounted on the housing 1 and is located in the first accommodating cavity 1a, the first bracket 31 is mounted on the housing 1 and is located in the first accommodating cavity 1a, the second bracket 32 ​​is movably connected to the first bracket 31, and the battery management unit 4 is mounted on the second bracket 32. The battery management unit 4 is used to monitor the voltage, current and temperature of the battery module 2, the battery management unit 4 is also used to control the voltage and current of the battery module 2, and the battery management unit 4 is also used for self-diagnosis and fault recording.

[0031] In the drawings herein, directions X, Y, and Z are perpendicular to each other, wherein direction Z represents the direction from the bottom of the battery pack 10 to the top of the battery pack 10. Direction X represents the direction from the inside of the first accommodation cavity 1a to the outside of the first accommodation cavity 1a through the first opening 121. The dotted lines in the drawings herein represent structural section lines.

[0032] Please refer to Figure 3~Figure 4 As shown, at least a portion of the structure of the second bracket 32 ​​and at least a portion of the structure of the battery management unit 4 can move between inside the first accommodating cavity 1 a and outside the first accommodating cavity 1 a through the first opening 121 .

[0033] For users, Figure 3 The second bracket 32 ​​and the battery management unit 4 are located in the first accommodating cavity 1a, and when the user needs to maintain the battery management unit 4, the user can operate the second bracket 32 ​​to move relative to the first bracket 31, so that at least part of the structure of the second bracket 32 ​​and at least part of the structure of the battery management unit 4 move from the first accommodating cavity 1a through the first opening 121 to the first accommodating cavity 1a. Figure 4 The second bracket 32 ​​and the battery management unit 4 are shown in a position outside the first accommodating cavity 1a. Since at least part of the structure of the second bracket 32 ​​and at least part of the structure of the battery management unit 4 can be located in a larger space outside the first accommodating cavity 1a, the larger space is convenient for the user to maintain the battery management unit 4, and the larger space is also convenient for the user to remove the battery management unit 4 from the second bracket 32 ​​and reinstall the battery management unit 4 to the second bracket 32. After the user maintains the battery management unit 4 and visually confirms that the battery management unit 4 is stably installed in the second bracket 32, the user can move the second bracket 32 ​​and the battery management unit 4 located outside the first accommodating cavity 1a back into the first accommodating cavity 1a through the first opening 121.

[0034] Compared with the fixed bracket for installing the battery management unit in the battery pack of the prior art, the bracket (including the first bracket and the second bracket) of the battery pack in the embodiment of the present application is a movable structure. The movable bracket reduces the difficulty of operation for the user when maintaining the battery management unit, and the labor intensity of the user is relatively low.

[0035] Optionally, see Figure 3-Figure 4 As shown, the first bracket 31 is rotatably connected to the second bracket 32. The second bracket 32 ​​can rotate relative to the first bracket 31, so that at least part of the structure of the second bracket 32 ​​and at least part of the structure of the battery management unit 4 can move between the inside and outside of the first accommodating cavity 1a through the first opening 121.

[0036] The rotation angle of the second bracket 32 ​​relative to the first bracket 31 is in the range of 0° to 100°, and can be specifically 0°, 10°, 20°, 30°, 40°, 50°, 60°, 70°, 80°, 90° or 100°.

[0037] In addition, if Figure 5 As shown, the embodiment of the present application does not specifically limit the specific structure of the first rotating pair 3a between the first bracket 31 and the second bracket 32. The first rotating pair 3a only needs to have a rotation function. The first rotating pair 3a can refer to the structure of a rotating pair (also known as a swivel pair, which allows two components to rotate relative to each other around a common axis) in the prior art.

[0038] Optionally, see Figure 5~Figure 6 As shown, the rotation axis (along direction Y) of the first rotation pair 3a between the first bracket 31 and the second bracket 32 ​​is perpendicular to the height direction of the battery pack (along direction Z) and also perpendicular to direction X. Under this setting, the second bracket 32 ​​can perform pitch motion relative to the first bracket 31 around direction Y. Figure 5 The position of the second bracket 32 ​​shown corresponds to the second bracket 32 ​​being in the first accommodating cavity 1a. Figure 6 The position of the second bracket 32 ​​shown corresponds to that at least a part of the structure of the second bracket 32 ​​is outside the first accommodating cavity 1 a.

[0039] Optionally, see Figure 7-Figure 8 As shown, the rotation axis of the first rotation pair 3a between the first bracket 31 and the second bracket 32 ​​can also be parallel to the height direction (direction Z) of the battery pack. Under this setting, the second bracket 32 ​​can deflect relative to the first bracket 31 around the direction Z. Figure 7 The position of the second bracket 32 ​​shown corresponds to the second bracket 32 ​​being in the first accommodating cavity 1a. Figure 8 The position of the second bracket 32 ​​shown corresponds to that at least a part of the structure of the second bracket 32 ​​is outside the first accommodating cavity 1 a.

[0040] Optionally, see Fig. 9 As shown, taking the rotation axis (along direction Y) of the first rotation pair 3a as perpendicular to direction X and direction Z as an example, the second bracket 32 ​​also includes a first structure 321 and a second structure 322, the first structure 321 is rotatably connected to the first bracket 31, the first structure 321 is rotatably connected to the second structure 322, and at least one battery management unit is installed on the second structure 322. Under this configuration, since the first structure 321 can be relative to the first bracket 31 as shown in the following example, Fig. 9 Rotate the position shown to Fig.10 The position shown in the figure allows at least one battery management unit to move from the first accommodation cavity to the outside of the first accommodation cavity, and the second structural member 322 can also be moved relative to the first structural member 321 as shown in the figure. Fig.10 The position shown is rotated as Fig.11 The position shown in the figure can further change the position of at least one battery management unit relative to the first bracket 31 so that at least one battery management unit is located in a position convenient for the user to operate, so as to further reduce the difficulty of operation for the user when maintaining the battery management unit.

[0041] Among them, the angle range of rotation of the second structural member 322 relative to the first structural member 321 is in the range of 0°~180°, specifically 0°, 10°, 20°, 30°, 40°, 50°, 60°, 70°, 80°, 90°, 100°, 110°, 120°, 130°, 140°, 150°, 160°, 170° or 180°.

[0042] In addition, please refer to Fig. 9 As shown, the rotation axis of the second rotation pair 3b between the first structural member 321 and the second structural member 322 is parallel to the rotation axis of the first rotation pair 3a, that is, the rotation axis of the second rotation pair 3b is also perpendicular to the Z direction and the X direction.

[0043] In other embodiments (not shown in the figures), under the condition that the rotation axis of the first rotation pair between the first structural member and the first bracket is perpendicular to the height direction of the battery pack, the rotation axis of the second rotation pair may also be perpendicular to the rotation axis of the first rotation pair.

[0044] In other embodiments (not shown in the figures), under the condition that the second bracket includes a first structural member and a second structural member that are rotatably connected, the rotation axis of the first rotation pair between the first structural member and the first bracket may also be parallel to the height direction of the battery pack.

[0045] In other embodiments (not shown in the figures), the first structural member and the second structural member may also be telescopically connected, and the second structural member may be extended to a position away from the first bracket relative to the first structural member, or the second structural member may be retracted to a position close to the first bracket relative to the first structural member. The structure of this embodiment may also further reduce the difficulty of operation for the user when maintaining the battery management unit.

[0046] The following content of this article is mainly described by taking the rotational connection between the first structural member and the second structural member as an example.

[0047] In addition, the battery management unit can be installed on the second structural member 322, and the battery management unit can also be installed on the first structural member 321. If the battery pack includes two battery management units, both battery management units can be installed on the second structural member 322, or one battery management unit is installed on the second structural member 322 and the other battery management unit is installed on the first structural member 321; if the battery pack includes more than two battery management units, both the first structural member 321 and the second structural member 322 can be installed with battery management units. Regardless of the number of battery management units, at least one battery management unit is installed on the second structural member 322.

[0048] In such Fig. 9 and Fig.10 In the structural state shown, the first structural member 321 and the second structural member 322 are both in a folded state. Fig. 9 He Ru Fig.10 The position of the second structural member 322 relative to the first structural member 321 is defined as the first position. Fig.11 In the structural state shown, the first structural member 321 and the second structural member 322 are in the unfolded state. Fig.11 The position of the second structure member 322 relative to the first structure member 321 is defined as a second position.

[0049] Alternatively, if Fig. 9 As shown, when the second bracket 32 ​​is located in the first accommodation cavity, the second structural member 322 can be located on the side of the first structural member 321 in the direction opposite to the direction X. In other words, the second structural member 322 is located on the side of the first structural member 321 close to the battery module.

[0050] In other embodiments (not shown in the figures), when the second bracket is located in the first accommodating cavity, the second structural member may also be located on a side of the first structural member close to the first opening. In other words, the second structural member may also be located on a side of the first structural member away from the battery module.

[0051] The following content of this article is mainly described by taking “when the second bracket 32 ​​is located in the first accommodating cavity, the second structure member 322 is located on one side of the first structure member 321 in the direction opposite to the direction X” as an example.

[0052] Optionally, see Figure 12~Figure 13 As shown, at least one battery management unit 4 may be located between the first structure member 321 and the second structure member 322 .

[0053] As Fig.12 Taking the structure shown as an example, the position of the second bracket 32 ​​corresponds to the second bracket 32 ​​in the first accommodating cavity, and two battery management units 4 can be installed on the second bracket 32, one of which is installed on the first structural member 321, and the battery management unit 4 is on the side of the first structural member 321 away from the second structural member 322; the other battery management unit 4 is installed on the second structural member 322, and the other battery management unit 4 is between the second structural member 322 and the first structural member 321. Under this setting, since the battery management unit 4 installed on the first structural member 321 is relatively close to the first opening, the user can first remove the battery management unit 4 located on the first structural member 321, and then the user can operate the second bracket 32 ​​to rotate relative to the first bracket 31, so that the second bracket 32 ​​drives the other battery management unit 4 to move outside the first accommodating cavity through the first opening, and then the user operates the second structural member 322 to rotate relative to the first structural member 321 from the first position to the second position, so that the other battery management unit 4 is located above the second structural member 322, so that the user can intuitively maintain the battery management unit 4 installed on the second structural member 322.

[0054] As Fig.13 Taking the structure shown as an example, the position of the second bracket 32 ​​corresponds to the second bracket 32 ​​in the first accommodating cavity, and two battery management units 4 can be installed on the second bracket 32, one of which is installed on the first structural member 321, and the battery management unit 4 is between the first structural member 321 and the second structural member 322; the other battery management unit 4 is installed on the second structural member 322, and the other battery management unit 4 is between the second structural member 322 and the first structural member 321. Under this setting, the user can first operate the second bracket 32 ​​to rotate relative to the first bracket 31, so that the second bracket 32 ​​drives the two battery management units 4 to move outside the first accommodating cavity through the first opening, and then the user operates the second structural member 322 to rotate from the first position to the second position relative to the first structural member 321, so that one of the battery management units 4 is located above the first structural member 321, and the other battery management unit 4 is located above the second structural member 322, so that the user can intuitively maintain the battery management unit 4.

[0055] Optionally, see Fig.14 As shown, at least one battery management unit 4 is located on a side of the second structure member 322 away from the first structure member 321 . In other words, at least one battery management unit 4 is located on a side of the second structure member 322 close to the battery module.

[0056] As Fig.14 Taking the structure shown as an example, the position of the second bracket 32 ​​corresponds to the second bracket 32 ​​in the first accommodating cavity, and two battery management units 4 can be installed on the second bracket 32, one of which is installed on the first structural member 321, and the battery management unit 4 is between the first structural member 321 and the second structural member 322; the other battery management unit 4 is installed on the second structural member 322, and the other battery management unit 4 is on the side of the second structural member 322 away from the first structural member 321. Under this setting, the user can first operate the second bracket 32 ​​to rotate relative to the first bracket 31, so that the second bracket 32 ​​drives the two battery management units 4 to move outside the first accommodating cavity through the first opening. At this time, one of the battery management units 4 is located above the first structural member 321, but the upper part of the battery management unit 4 located above the first structural member 321 is blocked by the second structural member 322, and the other battery management unit 4 is located above the second structural member 322. The current structural state facilitates the user to intuitively maintain the battery management unit 4 located above the second structural member 322. Then the user can operate the second structure member 322 to rotate from the first position to the second position relative to the first structure member 321, so that the second structure member 322 does not block the top of the battery management unit 4 installed on the first structure member 321, thereby facilitating the user to intuitively maintain the battery management unit 4 installed on the first structure member 321.

[0057] Of course, the number and position of the battery management units 4 installed on the second bracket 32 ​​can also be as follows: Figure 15~Figure 18 As shown, for the maintenance sequence of each battery management unit 4, please refer to the above Figure 12~Figure 14 The description shown is understood as Figure 15~Figure 18 The structure shown also has the effect of facilitating the user to intuitively maintain each battery management unit 4 .

[0058] Optionally, when the second bracket 32 ​​and the battery management unit 4 are in the first accommodating cavity 1a, the first bracket 31 is connected to the second bracket 32 ​​in a limiting manner to limit the rotation of the second bracket 32 ​​relative to the first bracket 31. Under this setting, when the user does not need to maintain the battery management unit 4, since the first bracket 31 is connected to the second bracket 32 ​​in a limiting manner, the second bracket 32 ​​cannot rotate freely relative to the first bracket 31, and the position of the battery management unit 4 installed on the second bracket 32 ​​relative to the first bracket 31 and the position relative to the housing 1 is relatively fixed, so that the possibility of collision between the battery management unit 4 and other components in the housing 1 is low, so that the working reliability of the battery management unit 4 is high.

[0059] Among them, when the second bracket 32 ​​and the battery management unit 4 are in the first accommodating cavity 1a, the limiting connection between the first bracket 31 and the second bracket 32 ​​may include at least one of a snap connection, a fastening connection and a magnetic connection.

[0060] Optionally, when at least part of the structure of the second bracket 32 ​​and at least part of the structure of the battery management unit 4 are outside the first accommodating cavity 1a, the first bracket 31 is connected to the second bracket 32 ​​in a limiting manner to limit the rotation of the second bracket 32 ​​relative to the first bracket 31. Under this setting, when the user maintains the battery management unit 4, since the first bracket 31 is connected to the second bracket 32 ​​in a limiting manner, the second bracket 32 ​​cannot rotate freely relative to the first bracket 31, and the position of the battery management unit 4 installed on the second bracket 32 ​​and located outside the first accommodating cavity 1a relative to the first bracket 31 and relative to the housing 1 is relatively fixed, so that the user can maintain the battery management unit 4 located outside the first accommodating cavity 1a.

[0061] Among them, when at least part of the structure of the second bracket 32 ​​and at least part of the structure of the battery management unit 4 are outside the first accommodating cavity 1a, the limiting connection between the first bracket 31 and the second bracket 32 ​​may include at least one of a snap connection, a fastening connection and a magnetic connection.

[0062] It should be noted that the limiting connection structure between the first bracket 31 and the second bracket 32 ​​located in the first accommodating cavity 1a and the limiting connection structure between the first bracket 31 and the second bracket 32 ​​located outside the first accommodating cavity 1a are limiting connection structures at different positions.

[0063] If the limiting connection between the first bracket 31 and the second bracket 32 ​​includes at least one of a snap connection and a magnetic connection, the user can easily change the first bracket 31 and the second bracket 32 ​​between the limiting connection state and the non-limiting connection state, making the user's operation easier and thus improving maintenance efficiency.

[0064] If the limiting connection between the first bracket 31 and the second bracket 32 ​​includes a fastening connection, the reliability of the limiting connection structure between the first bracket 31 and the second bracket 32 ​​is higher.

[0065] If the limiting connection between the first bracket 31 and the second bracket 32 ​​includes snap connection, specifically, the first bracket 31 and the second bracket 32 ​​can be snap connected via a concave-convex matching structure (not shown in the figure).

[0066] If the limiting connection between the first bracket 31 and the second bracket 32 ​​includes a fastening connection, specifically, an anti-slip screw (also known as a non-slip screw) can be used to fasten the first bracket 31 and the second bracket 32. In detail, when the first bracket 31 is not connected to the second bracket 32 ​​by the anti-slip screw, the anti-slip screw is also connected to the first bracket 31 or the second bracket 32, that is, the user is not likely to lose the anti-slip screw during maintenance.

[0067] Optionally, if the second bracket 32 ​​includes a first structural member 321 and a second structural member 322, when the first structural member 321 and the second structural member 322 are in the first position, the first structural member 321 and the second structural member 322 can be connected in a limited position to limit the rotation of the second structural member 322 relative to the first structural member 321; when the first structural member 321 and the second structural member 322 are in the second position, the first structural member 321 and the second structural member 322 can also be connected in a limited position to limit the rotation of the second structural member 322 relative to the first structural member 321. The limited connection between the first structural member 321 and the second structural member 322 may include at least one of a snap connection, a fastening connection, and a magnetic connection. The specific content of the limited connection between the first structural member 321 and the second structural member 322 can refer to the above description of the limited connection, which will not be repeated here.

[0068] Optionally, the battery pack 10 further includes a cable (not shown in the figure), which electrically connects the battery management unit 4 and the battery module 2, so that the battery management unit 4 can monitor the battery module 2 through the cable. Part of the structure of the cable can be installed on the first rotating joint 3a, and part of the structure of the cable is extended along the rotation axis of the first rotating joint 3a.

[0069] by Figure 5 Taking the first rotating pair 3a shown in the figure as an example, when the battery management unit is installed on the second bracket 32, a part of the cable can be installed on the first rotating pair 3a, and a part of the cable can extend in a direction perpendicular to the direction Z and perpendicular to the direction X. Under this setting, the first rotating pair 3a has a cable management function (arranging the cables neatly and orderly for easy management and maintenance), even if the second bracket 32 ​​is in the Figure 5 The location and Figure 6As the cable is flexible, the portion of the cable installed at the first rotational pair 3a only follows the first rotational pair 3a to undergo a torsion that the cable can withstand, and the torsion will not cause the cable to break or tear. Therefore, the arrangement of this embodiment makes it difficult for the user to damage the cable when maintaining the battery management unit.

[0070] Part of the cable may be installed inside the first rotational pair 3a or outside the first rotational pair 3a.

[0071] Optionally, see Fig.19 As shown, the first rotating pair 3a is provided with a second accommodating cavity 321a, a second opening 321b and a third opening 321c which are connected to each other. The second accommodating cavity 321a is extended along the rotation axis of the first rotating pair 3a. In other words, the second accommodating cavity 321a is extended along the direction Y. The second opening 321b and the third opening 321c are spaced apart on the rotation axis of the first rotating pair 3a. In other words, the second opening 321b and the third opening 321c are spaced apart in the direction Y. Cables can be passed through the second opening 321b, the second accommodating cavity 321a and the third opening 321c. Under this setting, the first rotating pair 3a can also protect a part of the cable through the structure, and the structure between the first rotating pair 3a and the cable is highly compact, occupying less space in the first accommodating cavity 1a, so that the volume of the battery module accommodated in the first accommodating cavity 1a can be larger, thereby allowing the battery pack 10 to store more electrical energy, or, so that the external dimensions of the shell 1 can be smaller, thereby making the volume of the battery pack 10 smaller, so that the battery pack 10 has the advantage of portability.

[0072] Please refer to Fig.19 As shown, the second accommodating cavity 321a, the second opening 321b and the third opening 321c can be provided in the second bracket 32. More specifically, the second accommodating cavity 321a, the second opening 321b and the third opening 321c can be provided in the first structural member 321. Fig. 20As shown, the second opening 321b and the third opening 321c are arranged on the curved side wall of the rotating shaft in the second bracket 32 ​​and extend around the direction Y. Under this arrangement, even if the second bracket 32 ​​rotates relative to the first bracket 31, the portion of the cable passing through the second opening 321b can swing in the second opening 321b, or in other words, the portion of the cable passing through the second opening 321b can swing on a plane parallel to the directions X and Z; the portion of the cable passing through the third opening 321c can swing in the third opening 321c, or in other words, the portion of the cable passing through the third opening 321c can swing on a plane parallel to the directions X and Z. Under this arrangement, the rotation of the second bracket 32 ​​does not interfere with the cable, and the cable will not be overstretched by the rotating second bracket 32, thereby causing the cable to tear or break.

[0073] In other embodiments (not shown in the figures), the second accommodating cavity, the second opening and the third opening may also be provided on the first bracket.

[0074] against Fig. 9 In the structure shown, if the battery management unit is installed on the second structural member 322, a part of the cable electrically connected to the battery management unit installed on the second structural member 322 can be installed on the second rotating pair 3b, and another part of the cable electrically connected to the battery management unit installed on the second structural member 322 can be installed on the first rotating pair 3a. Under this setting, even when the second rotating pair 3b and the first rotating pair 3a rotate in sequence, the cable electrically connected to the battery management unit installed on the second structural member 322 follows the second rotating pair 3b and follows the first rotating pair 3a to undergo a torsion that the cable can withstand, and both torsion processes will not cause the cable to break or tear.

[0075] Part of the cable electrically connected to the battery management unit installed on the second structural member 322 may be installed inside the second rotating joint 3b or outside the second rotating joint 3b.

[0076] If a portion of the cable electrically connected to the battery management unit installed on the second structural member 322 is installed inside the second rotational pair 3b, the structure of the second rotational pair 3b can refer to the following example. Fig.19 and Fig. 20 Regarding the structure of the first rotating pair, that is, the second rotating pair 3b may also be provided with an opening (not shown in the figure) and a receiving cavity (not shown in the figure) for the cable to pass through the opening and the receiving cavity.

[0077] In addition to the above-described first bracket 31 and second bracket 32 ​​are rotatably connected. Figure 21-22 As shown, the first bracket 31 and the second bracket 32 ​​can also be telescopically connected.

[0078] The second bracket 32 ​​can telescopically move relative to the first bracket 31 in a direction parallel to the direction X, so that at least part of the structure of the second bracket 32 ​​and at least part of the structure of the battery management unit 4 can move between the inside and outside of the first accommodating cavity 1a through the first opening 121. Fig.21 As shown, the second bracket 32 ​​and the battery management unit 4 are in the first accommodating chamber 1a, as shown in FIG. Fig. 22 As shown, the second bracket 32 ​​and the battery management unit 4 are outside the first accommodating cavity 1a.

[0079] Optionally, see Figure 23~Figure 24 As shown, the first bracket 31 and the second bracket 32 ​​are connected by a diamond-shaped folding frame 3c.

[0080] like Fig.23 As shown, the diamond-shaped folding frame 3c is in a folded state, and the second bracket 32 ​​is close to the first bracket 31. Under this setting, the second bracket 32 ​​and the battery management unit can be stored in the first accommodating cavity.

[0081] like Fig.24 As shown, the diamond-shaped folding frame 3c is in an unfolded state, and the second bracket 32 ​​is away from the first bracket 31. Under this setting, the second bracket 32 ​​and the battery management unit can be located outside the first accommodating cavity.

[0082] Optionally, see Figure 25-26 As shown, the first bracket 31 and the second bracket 32 ​​are connected by a telescopic rod 3d.

[0083] like Fig.25 As shown, the telescopic rod 3d is in a retracted state, and the second bracket 32 ​​is close to the first bracket 31. Under this setting, the second bracket 32 ​​and the battery management unit can be stored in the first accommodating cavity.

[0084] like Fig.26 As shown, the telescopic rod 3d is in an extended state, and the second bracket 32 ​​is away from the first bracket 31. Under this setting, the second bracket 32 ​​and the battery management unit can be located outside the first accommodating cavity.

[0085] The telescopic rod 3d may have a telescopic structure of two levels, three levels, four levels or more to meet the needs of different telescopic lengths.

[0086] In other embodiments (not shown in the figures), the telescopic rod can be replaced by a telescopic slide rail mechanism.

[0087] Optionally, when the user does not need to maintain the battery management unit and the second bracket 32 ​​is located in the first accommodating cavity, the second bracket 32 ​​is limitedly connected to the first bracket 31 to limit the extension and retraction of the second bracket 32 ​​relative to the first bracket 31, so as to limit the position of the battery management unit installed on the second bracket 32 ​​in the first accommodating cavity, so as to reduce the possibility of the battery management unit colliding with other structural parts in the first accommodating cavity, thereby improving the working reliability of the battery management unit.

[0088] Optionally, the limiting connection between the second bracket 32 ​​and the first bracket 31 includes at least one of a snap connection, a fastening connection and a magnetic connection to meet the need of limiting the extension and retraction of the second bracket 32 ​​located in the first accommodating cavity relative to the first bracket 31.

[0089] The specific structure and effect of the position-limiting connection between the second bracket 32 ​​and the first bracket 31 can be referred to the above description of the position-limiting connection, which will not be repeated here.

[0090] Optionally, the battery management unit 4 and the second bracket 32 ​​may be connected via a quick-release structure. In this arrangement, the user can quickly remove the battery management unit 4 from the second bracket 32, or the user can quickly assemble the battery management unit 4 to the second bracket 32. Therefore, the structure of this embodiment has the advantages of low user operation difficulty and high maintenance efficiency.

[0091] The quick-release structure between the battery management unit 4 and the second bracket 32 ​​may include at least one of a snap connection and a magnetic connection.

[0092] Optionally, the battery management unit 4 and the second bracket 32 ​​can be connected by a fastener structure. The fastener can be a connector such as a screw, a bolt or a pin. Among them, the screw can be an anti-slip screw, and the screw will not detach from the second bracket 32 ​​or the battery management unit 4.

[0093] Optionally, see Figure 3-Figure 4 As shown, the housing 1 includes a bottom plate 11 , a first bracket 31 is mounted on the bottom plate 11 , and a second bracket 32 ​​is located on a side of the first bracket 31 away from the bottom plate 11 .

[0094] Optionally, see Figure 3-Figure 4 As shown, the housing 1 includes a top cover 12, and a first opening 121 is formed on a side wall of the top cover 12. The top cover 12 is covered on the bottom plate 11, and the bottom plate 11 and the top cover 12 are enclosed to form a first accommodating cavity 1a.

[0095] In other embodiments (not shown in the figures), the first bracket may also be installed on the top cover.

[0096] The shell 1 (including the bottom plate 11 and the top cover 12 ) may be made of aluminum, aluminum alloy or other metal materials, or the shell 1 may also be made of non-metallic materials.

[0097] The bottom plate 11 and the top cover 12 may be connected by bolts or other fixing members. A sealing member (not shown in the figure) may also be provided between the bottom plate 11 and the top cover 12 to seal the first accommodating chamber 1a.

[0098] Optionally, see Figure 1-Figure 2 As shown, the battery pack 10 further includes a panel 13, which is movably connected to the top cover 12, or the panel 13 can be detachably connected to the top cover 12, and the panel 13 can cover the opening 121 to close the first accommodating cavity 1a.

[0099] In a second aspect, an embodiment of the present application provides an energy storage device, which includes an inverter, a battery management system (BMS), and at least one battery pack 10 described above.

[0100] The inverter is used to convert direct current into alternating current. The inverter has the advantages of high conversion efficiency, fast startup speed, high safety, etc. It also has the functions of short circuit, overload, over / under voltage and over-temperature protection.

[0101] The battery management system is used to make the battery pack operate within a safe operating range. It can control the charging and discharging power of the battery pack according to factors such as ambient temperature, battery status, and power demand, thereby improving the safety of the battery pack and making the working state of the battery pack more reasonable, which is beneficial to improving the battery life and service life of the battery pack.

[0102] Since the energy storage device of the embodiment of the present application includes the battery pack described above, the energy storage device also includes the technical effects related to the battery pack described above.

[0103] The energy storage device may specifically be: Fig. 27 The energy storage box shown (also known as a large energy storage device, suitable for large-scale industrial production or technical fields such as power distribution) includes a box body, and the box body has a storage space, and the inverter, battery management system and battery pack are all in the storage space.

[0104] The energy storage device may specifically be: Fig.28 The energy storage cabinet shown (also known as industrial and commercial energy storage device, suitable for small-scale industrial and commercial electricity needs) includes a cabinet body, which has a storage space, and the inverter, battery management system and battery pack are all in the storage space.

[0105] The above description is only the preferred embodiment of the present application and is not intended to limit the present application. For those skilled in the art, the present application may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A battery pack, characterized in that: include: The housing is provided with a first accommodating cavity and a first opening which are in communication with each other; A battery module, mounted on the housing and located in the first accommodating cavity; A first bracket, mounted on the housing and located in the first accommodating cavity; A second bracket, movably connected to the first bracket; A battery management unit, mounted on the second bracket; At least a portion of the structure of the second bracket and at least a portion of the structure of the battery management unit can move between inside the first accommodating cavity and outside the first accommodating cavity through the first opening.

2. The battery pack according to claim 1, characterized in that: The first bracket is rotatably connected to the second bracket; Alternatively, the first bracket is telescopically connected to the second bracket.

3. The battery pack according to claim 2, characterized in that: When the first bracket is rotatably connected with the second bracket; A rotation axis of the first rotation pair between the first bracket and the second bracket is perpendicular to a height direction of the battery pack; Alternatively, a rotation axis of a first rotation pair between the first bracket and the second bracket is parallel to a height direction of the battery pack.

4. The battery pack according to claim 2, characterized in that: When the first bracket is rotatably connected with the second bracket; The second bracket further comprises a first structural member and a second structural member, the first structural member is rotatably connected to the first bracket, and the first structural member is rotatably connected or telescopically connected to the second structural member; At least one of the battery management units is mounted on the second structure.

5. The battery pack according to claim 4, characterized in that: When the first structural member is rotatably connected to the second structural member, the second structural member can rotate to a first position or a second position relative to the first structural member; In the first position, the first structure member and the second structure member are in a folded state, and in the second position, the first structure member and the second structure member are in an unfolded state.

6. The battery pack according to claim 5, characterized in that: When the second bracket is located in the first accommodating cavity, the second structural member is located on a side of the first structural member close to the battery module, or the second structural member is located on a side of the first structural member away from the battery module.

7. The battery pack according to claim 6, characterized in that: At least one of the battery management units is located between the first structural member and the second structural member; Alternatively, at least one of the battery management units is located on a side of the second structure member facing away from the first structure member.

8. The battery pack according to claim 2, characterized in that: When the first bracket is telescopically connected to the second bracket; The first bracket and the second bracket are connected via a diamond-shaped folding bracket, or the first bracket and the second bracket are connected via a telescopic rod.

9. The battery pack according to any one of claims 1 to 8, characterized in that: When the second bracket is located in the first accommodating cavity, the first bracket is also connected to the second bracket in a limiting manner to limit the movement of the second bracket relative to the first bracket; And / or, when at least a portion of the structure of the second bracket is outside the first accommodating cavity, the first bracket is also connected to the second bracket in a limiting manner to limit the movement of the second bracket relative to the first bracket.

10. An energy storage device, characterized in that: The energy storage device includes an inverter, a battery management system and at least one battery pack, wherein the battery pack is the battery pack according to any one of claims 1 to 9.

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