Energy storage device

Abstract

The utility model provides an energy storage device. The energy storage device comprises a bracket; the battery pack is arranged on the bracket through a battery pack frame of the battery pack; and a fixing device having: a fixing shaft fixed to the bracket; the baffle is arranged on the fixed shaft in a sleeving manner in a rotatable resetting manner; the locking hook is arranged on the battery pack frame, the battery pack frame is pushed to move on the bracket in the first direction, and the locking hook pushes the baffle to rotate forwards to cross the locking hook, so that the baffle is triggered to rotate reversely to clamp the locking hook, and the battery pack frame is locked to prevent the battery pack frame from moving in the second direction opposite to the first direction. The energy storage device can prevent the battery pack from being unlocked in the opposite direction after being pushed and locked.

Description

Technical Field

[0001] The present application relates to the technical field of energy storage equipment, and in particular to an energy storage device. Background Art

[0002] With the development of battery technology, the application scenarios of energy storage devices are gradually increasing. Energy storage devices can be energy storage cabinets, energy storage containers, energy storage warehouses, etc. Energy storage devices are generally composed of multiple battery packs, and multiple battery packs are connected in series or in parallel to form an energy storage system. In order to improve the efficiency of group installation of battery packs, battery packs are generally installed in drawers in energy storage devices. The bracket of the energy storage device carries the battery pack. Fixed metal blocks are welded on the bracket to limit the rear position of the battery pack. The front end of the battery pack is fixed to the cabinet column by ordinary fixing methods, such as connecting the front end of the battery pack to the cabinet column by bolts. There is generally no fixed point between the middle of the battery pack and the bracket. When the bracket is "L" shaped, the left and right and bottom positions of the battery pack are limited only by the "L" shaped bracket.

[0003] The assembly of the fixing device for fixing the battery pack and the bracket in the current energy storage device is cumbersome and inefficient. In addition, in the current energy storage device, there is only a fixing point at the front end of the battery pack to connect the battery pack and the bracket. Due to the actual space limitation, the rear end of the battery pack is generally limited by a block in one direction. However, this technology has the following disadvantages: First, due to the actual production tolerance, it is easy to cause a large gap between the battery pack and the block. In actual transportation, the battery pack will inevitably slide and collide on the bracket in the energy storage device, causing abnormal noise; second, if it tilts during transportation or hoisting, the fixing point at the front end of the battery pack is easily deformed by force, affecting subsequent maintenance; third, due to the different fixing stiffness of the front and rear of the battery pack, the amplitude is generally biased towards the rear end of the battery pack, which is easy to cause stress concentration at the front fixed position, causing structural damage. Utility Model Content

[0004] In view of the above problems existing in the prior art, the purpose of the present invention is to provide an energy storage device that can prevent the battery pack from being unlocked in the opposite direction after being pushed and locked.

[0005] To achieve the above-mentioned purpose, the utility model provides an energy storage device, which includes: a bracket; a battery pack, which is arranged on the bracket through a battery pack frame of the battery pack; and a fixing device, which has: a fixed shaft, which is fixed to the bracket; a baffle, which is rotatably and resettably sleeved on the fixed shaft; and a locking hook, which is arranged on the battery pack frame, wherein, by pushing the battery pack frame to move along a first direction on the bracket, the locking hook pushes the baffle to rotate forward and pass over the locking hook, thereby triggering the baffle to rotate in the opposite direction to clamp the locking hook, so as to lock the battery pack frame to prevent the battery pack frame from moving in a second direction opposite to the first direction.

[0006] In one or more embodiments, the locking hook includes a stop surface and a hook portion protruding compared to the stop surface. When the baffle plate catches the locking hook, the outer peripheral surface of the baffle plate presses against the stop surface and the end of the baffle plate presses against the hook portion.

[0007] In one or more embodiments, the energy storage device also includes a return spring and an unlocking hook fixedly connected to the baffle, wherein one end of the return spring is fixedly connected to the unlocking hook, and the other end is fixedly connected to the bracket, wherein the return spring tightens the unlocking hook when the baffle rotates forward to apply an elastic restoring force to the baffle to cause it to rotate in the opposite direction.

[0008] In one or more embodiments, as the battery pack frame moves further in the first direction, the stop surface pushes the baffle in the locked state to rotate, so that the end of the baffle is separated from the hook, wherein the baffle is rotated to disengage from the locking hook by pulling the unlocking hook along the second direction, thereby unlocking the battery pack frame from the locked state.

[0009] In one or more embodiments, the baffle and the unlocking hook are an integral structure.

[0010] In one or more embodiments, the end of the baffle is provided with a lower edge extending in a direction away from the fixed axis. By pushing the lower edge to move in a first direction, the baffle in the locked state is driven to rotate until it disengages from the locking hook, thereby unlocking the battery pack frame from the locked state.

[0011] In one or more embodiments, the baffle and the lower edge are an integral structure.

[0012] In one or more embodiments, the energy storage device further includes a column fixed on the bracket, wherein when the baffle plate rotates in the reverse direction and catches the locking hook, the column blocks the unlocking hook from continuing to rotate in the reverse direction.

[0013] In one or more embodiments, the fixing device is disposed at the rear end of the battery pack frame.

[0014] In one or more embodiments, the bracket includes a pair of L-shaped brackets spaced laterally apart, with the lateral portions of each L-shaped bracket facing each other, wherein the fixed axis is fixed to the vertical portion of one L-shaped bracket, and the locking hook is formed on the side wall of the battery pack frame facing the vertical portion.

[0015] The beneficial technical effects of the utility model are:

[0016] The embodiments of the present application use a fixed shaft fixed to the bracket, a baffle sleeved on the fixed shaft in a rotatable and resetting manner, and a locking hook set on the battery pack frame to form a new type of fixing device. By pushing the battery pack frame to move along the first direction on the bracket, the baffle cooperates with the locking hook to lock the battery pack frame, lock the battery pack to the bracket and prevent the battery pack from moving along the second direction opposite to the first direction on the bracket. In addition, the energy storage device of the utility model can achieve mechanical self-locking through the new type of fixing device, improve assembly efficiency, and achieve the purpose of quickly fixing the battery pack. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the drawings required for use in the embodiments are 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 also be obtained based on these drawings without creative work. It is worth noting that according to the standard practice of the industry, the various components are not drawn to scale and are only used for illustration purposes. In fact, for the clarity of discussion, the size of each component can be arbitrarily increased or reduced.

[0018] Figure 1 A three-dimensional schematic diagram of an energy storage device observed from the front end of a battery pack according to an embodiment of the present application is shown.

[0019] Figure 2 A three-dimensional schematic diagram of an energy storage device observed from the rear end of a battery pack according to an embodiment of the present application is shown.

[0020] Figure 3 Shows Figure 2 Magnified view of area A in FIG.

[0021] Figure 4 A three-dimensional schematic diagram of the fixing device in a locked state is shown.

[0022] Figure 5 Shows the battery pack removed. Figure 2 Magnified view of area A in FIG.

[0023] Figure 6 Shown after omitting the vertical portion of the bracket Figure 5 Right view of .

[0024] Figure 7 A schematic side view of the securing device is shown in the locked state.

[0025] Figure 8 A schematic side view of the securing device is shown in the unlocked state. DETAILED DESCRIPTION

[0026] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments in the present application belong to the scope of protection of this application.

[0027] The following disclosure provides many different embodiments or examples for realizing different features of the provided subject matter. Specific examples of components and arrangements will be described below to simplify the present invention. Of course, these are merely examples and are not intended to limit the present invention. For example, in the following description, forming a first component above or on a second component may include an embodiment in which the first component and the second component are in direct contact, and may also include an embodiment in which an additional component is formed between the first component and the second component so that the first component and the second component may not be in direct contact. Moreover, the present invention may repeatedly refer to numbers and / or letters in various examples. This repetition is only for simplicity and clarity, and does not itself represent the relationship between the various embodiments and / or configurations discussed.

[0028] In addition, the embodiments in the present application and the features in the embodiments may be combined with each other in the absence of conflicts. The present application will be described in detail below with reference to the accompanying drawings and in conjunction with the embodiments. It should be understood that the specific structures shown in the drawings are only for the sake of convenience of explanation and are not intended to limit the present application. When describing a specific figure, other structures not described in the drawings may be provided according to actual needs and are not intended to limit the present application.

[0029] Figure 1 1 shows a three-dimensional schematic diagram of the energy storage device 100 observed from the front end of the battery pack 20 according to an embodiment of the present application, Figure 2 1 shows a three-dimensional schematic diagram of the energy storage device 100 observed from the rear end of the battery pack 20 according to an embodiment of the present application, Figure 3 Shows Figure 2 A magnified view of area A in Figure 4 A three-dimensional schematic diagram showing a fixing device 6 in a locked state, Figure 5 The battery pack 20 is shown removed (see Figure 2 ) Figure 2 A magnified view of area A in Figure 6 The vertical portion 22 of the bracket 2 is omitted (see Figure 3 ) Figure 5 Right view of Figure 7 A schematic side view of the fixing device 6 in a locked state is shown, Figure 8 A schematic side view of the fixing device 6 in the unlocked state is shown. Figure 2It is shown that the fixing device 6 is arranged at the rear end of the battery pack frame 4. It should be understood that the figure is a specific embodiment of the present application, and the present application does not limit the fixing device 6 to be arranged only at the rear end of the battery pack frame 4 / battery pack 20. Among them, "front end" and "rear end" are relative concepts. When the battery pack 20 is arranged on the bracket 2, for example, by pushing, when the battery pack 20 is pushed into the energy storage device 100, the end that first enters the energy storage device 100 is the rear end of the battery pack 20, and the opposite end is the front end.

[0030] The present application provides an energy storage device 100, including a bracket 2 and a battery pack 20, wherein the battery pack 20 includes a battery pack frame 4, and the battery pack 20 is arranged on the bracket 2 through the battery pack frame 4. The energy storage device 100 also includes a fixing device 6, and the fixing device 6 has: a fixed shaft 7, a baffle 8 and a locking hook 17, wherein the fixed shaft 7 is fixed to the bracket 2, and the fixed shaft 7 and the bracket 2 can be riveted or welded together, the baffle 8 is sleeved on the fixed shaft 7 in a rotatable and resettable manner, and the locking hook 17 is arranged on the battery pack frame 4, wherein by pushing the battery pack frame 4 to move along a first direction on the bracket 2, the locking hook 17 pushes the baffle 8 to rotate forward to pass the locking hook 17, thereby triggering the baffle 8 to rotate in the opposite direction to clamp the locking hook 17, so as to lock the battery pack frame 4 to prevent the battery pack frame 4 from moving in a second direction opposite to the first direction. In some embodiments, the first direction can be the forward direction of installing the battery pack 20 on the bracket 2, and correspondingly, the second direction is the backward direction of removing the battery pack 20. Although Figure 1 and Figure 2 It is also shown that the bracket 2 is arranged on the column 1. Figure 3 -and Figure 8 Other structures and detailed connection relationships are also shown in the figure. It should be understood that the figure is only a specific example for ease of understanding and is not intended to limit the present application. For clarity, Figure 1 The battery pack cover 5 is also shown. The embodiment of the present application includes a fixing device 6, which can at least lock the battery pack frame 4, lock the battery pack 20 to the bracket 2 and prevent the battery pack 20 from being unlocked in the opposite direction on the bracket 2 after being pushed and locked.

[0031] In some embodiments, the locking hook 17 includes a stop surface 16 and a hook portion 15 that is raised compared to the stop surface 16. When the baffle 8 is located at a position where the locking hook 17 is clamped, the outer peripheral surface of the baffle 8 is pressed against the stop surface 16, and the end 84 of the baffle 8 is pressed against the hook portion 15. When the battery pack frame 4 moves along the second direction, the end 84 of the baffle 8 presses against the hook portion 15, and the stop surface 16 prevents the baffle 8 from rotating, thereby preventing the battery pack frame 4 from moving along the second direction. The baffle 8 serves to constrain the battery pack frame 4 from moving upward and in the second direction. Figure 4 , Figure 7 and Figure 8As shown, the stop surface 16 is an arcuate surface. The stop surface 16 can also be an inclined plane or other reasonable structure that can prevent the baffle 8 from rotating.

[0032] In some embodiments, the energy storage device 100 may further include a reset spring 11 and an unlocking hook 10 fixedly connected to the baffle 8, the unlocking hook 10 and the baffle 8 may be an integral structure, the baffle 8 and the unlocking hook 10 rotate synchronously around the fixed axis 7, wherein one end 14 of the reset spring 11 is fixedly connected to the unlocking hook 10, and the other end is fixedly connected to the bracket 2, and the other end can be used as a spring fixing point 12, and the reset spring 11 tightens the unlocking hook 10 when the baffle 8 rotates forward to apply an elastic restoring force (pulling force) to the baffle 8 to make it rotate in the reverse direction. In other embodiments, a compression spring (not shown) may also be included, the compression spring and the illustrated reset spring 11 are arranged on the opposite side of the unlocking hook 10 (the illustrated reset spring 11 may not be included), one end of the compression spring is fixedly connected to the unlocking hook 10, and the other end is fixedly connected to the bracket 2, wherein when the baffle 8 rotates forward, the compression spring is compressed by the unlocking hook 10 to apply an elastic restoring force (thrust) to the baffle 8 to make it rotate in the reverse direction. The spring in the embodiment of the present application plays the energy storage and release function of self-locking and unlocking.

[0033] In some embodiments, the energy storage device 100 may further include a column 13 fixed to the bracket 2, wherein the column 13 blocks the unlocking hook 10 from continuing to rotate in the opposite direction at the position where the baffle 8 rotates in the opposite direction and catches the locking hook 17, and the column 13 may serve as a reset fixing point for the unlocking hook 10. The column 13 may also prevent the baffle 8 from rotating in the opposite direction, and when the battery pack frame 4 moves in the second direction, the end 84 of the baffle 8 presses against the hook 15, and the column 13 prevents the baffle 8 from rotating in the opposite direction, and the battery pack frame 4 is locked, thereby preventing the battery pack frame 4 from moving in the second direction. The setting position of the column 13 may ensure that the reset spring 11 is in a natural state at the position where the baffle 8 rotates in the opposite direction and catches the locking hook 17.

[0034] In some embodiments, as the battery pack frame 4 moves further in the first direction, the stop surface 16 pushes the baffle 8 in the locked state to rotate, so that the end 84 of the baffle 8 is separated from the hook 15, wherein the baffle 8 is rotated to disengage from the locking hook 17 by pulling the unlocking hook 10 along the second direction, thereby unlocking the battery pack frame 4 from the locked state. In some embodiments, the end of the baffle 8 is provided with a lower edge 82 extending in a direction away from the fixed axis 7, and the lower edge 82 and the baffle 8 can be an integral structure, and by pushing the lower edge 82 to move in the first direction, the baffle 8 in the locked state is driven to rotate to disengage from the locking hook 17, thereby unlocking the battery pack frame 4 from the locked state.

[0035] In some embodiments, the fixing device 6 is arranged at the rear end of the battery pack frame 4. The rear end of the battery pack frame 4 of the embodiment of the present application is locked to the bracket 2, that is, the rear end of the battery pack 20 is locked to the bracket 2, which can reduce the abnormal noise caused by the battery pack 20 sliding and colliding on the bracket 2 due to the gap between the battery pack 20 and the block in the prior art. When the front end of the battery frame 4 is also fixedly connected to the bracket 2 by the locking device 3, the energy storage device 100 of the embodiment of the present application adds the rear end connection of the battery pack 20, wherein the rear end of the battery pack frame 4 is locked to the bracket 2 by the fixing device 6. The embodiment of the present application can at least solve the problem of the single side (front end) sliding out under force when the battery pack 20 is tilted, and the front and rear ends of the battery pack 20 are fixedly connected at the same time, reducing the probability that the fixing point of the front end of the battery end 20 is easily deformed by force; in addition, the embodiment of the present application can also improve the problem of insufficient connection strength between the battery pack 20 and the bracket 2 and the asymmetric connection stiffness, improve the system integrity, take into account the assembly efficiency, and achieve the purpose of quickly fixing the battery pack 20.

[0036] In some embodiments, the bracket 2 includes a pair of L-shaped brackets spaced laterally apart, with the lateral portions 24 of each L-shaped bracket facing each other, wherein the fixed axis 7 is fixed to the vertical portion 22 of one L-shaped bracket, and the locking hook 17 is formed on the side wall 42 of the battery pack frame 4 facing the vertical portion 22.

[0037] In some embodiments, the energy storage device 100 may further include a stopper 9 disposed on the bracket 2 , wherein the stopper 9 is disposed opposite to an end of the battery pack frame 4 to block movement of the battery pack frame 4 on the bracket 2 along the first direction.

[0038] In some embodiments, the battery pack 2 is loaded from the front end and slowly pushed forward with the "L"-shaped bracket. When the battery pack frame 4 is pushed forward to the baffle 8 contacting the fixing device 6, the rotatable baffle 8 will be lifted up with the advancement of the battery pack frame 4, and the unlocking hook 10 will rotate accordingly. At the same time, the reset spring 11 will be stretched, and there will be a certain contraction force. When the battery pack frame 4 continues to advance until the baffle 8 passes over the hook 15 of the locking hook 17, the baffle 8 rotates in the opposite direction under the action of the spring tension, and the baffle 8 is stuck to the hook 15 of the locking hook 17, completing the self-locking process. The locking state is as follows: Figure 7 shown.

[0039] In some embodiments, when the battery pack 20 is to be removed from the energy storage device 100, after unlocking the locking device 3 at the front end to release the front end fixation, the battery pack 20 is first pushed to the rear end so that the battery pack frame 4 moves backward a certain distance. A certain gap is left between the hook portion 15 of the locking hook 17 on the battery pack frame 4 and the end 84 of the baffle 8 to facilitate unlocking. Then, the gripper is inserted deep into the front end to hook the unlocking hook 10 and pull it toward the front end. The baffle 8 then rotates around the fixed axis 7 and completely disengages from the locking hook 17 / battery pack frame 4 to complete unlocking. The battery pack 20 is then pulled forward to remove the battery pack 20. In other embodiments, a long strip can be inserted deep into the cavity 30 of the battery pack frame 4 to push the lower edge 82 of the baffle 8 backward, which also drives the baffle 8 to rotate to disengage from the locking hook 17 / battery pack frame 4 to complete unlocking. The unlocked state is as follows: Figure 8 The unlocking hook 10 and the lower edge 82 of the baffle 8 in the embodiment of the present application can function as an unlocking switch, and unlocking is achieved by cooperating with the front gripper.

[0040] The energy storage device provided by the utility model can achieve mechanical self-locking through a novel fixing device, which can realize quick fixing of the battery pack, improve the connection strength and rigidity of the rear end of the battery pack, solve the problem of unilateral force on the locking part when tilted, and improve the overall reliability of the energy storage device; the fixing device in the utility model can make the front and rear connection rigidity of the battery pack nearly symmetrical, reduce the risk of failure caused by local stress concentration due to transportation vibration; the fixing device can realize quick unlocking from the outside, and minimize the impact on the existing assembly process.

[0041] The above description is only a preferred embodiment of the present application and is not intended to limit the present application. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present application should be included in the protection scope of the present application.

Claims

1. An energy storage device, characterized in that: include: bracket; a battery pack, disposed on the bracket via a battery pack frame of the battery pack; as well as A fixing device, the fixing device having: A fixed shaft, fixed to the bracket; A baffle plate is sleeved on the fixed shaft in a rotatable and resetting manner; A locking hook is arranged on the battery pack frame, Among them, by pushing the battery pack frame to move along the first direction on the bracket, the locking hook pushes the baffle to rotate forward and pass over the locking hook, thereby triggering the baffle to rotate reversely and clamp the locking hook, so as to lock the battery pack frame to prevent the battery pack frame from moving in a second direction opposite to the first direction.

2. The energy storage device according to claim 1, characterized in that: The locking hook comprises a stop surface and a hook portion protruding from the stop surface. At the position where the baffle plate clamps the locking hook, the outer peripheral surface of the baffle plate presses against the stop surface, and the end of the baffle plate presses against the hook portion.

3. The energy storage device according to claim 2, characterized in that: It also includes a return spring and an unlocking hook fixedly connected to the baffle, One end of the return spring is fixedly connected to the unlocking hook, and the other end is fixedly connected to the bracket. The return spring tightens the unlocking hook when the baffle rotates forwardly, so as to apply an elastic restoring force to the baffle to make it rotate in the reverse direction.

4. The energy storage device according to claim 3, characterized in that: As the battery pack frame moves further in the first direction, the stop surface pushes the baffle in the locked state to rotate, so that the end of the baffle is separated from the hook portion. By pulling the unlocking hook along the second direction, the baffle is rotated to be disengaged from the locking hook, thereby unlocking the battery pack frame from the locked state.

5. The energy storage device according to claim 3, characterized in that: The baffle plate and the unlocking hook are an integrated structure.

6. The energy storage device according to claim 1, characterized in that: The end of the baffle is provided with a lower edge extending in a direction away from the fixed axis. By pushing the lower edge to move toward the first direction, the baffle in the locked state is driven to rotate until it is disengaged from the locking hook, thereby unlocking the battery pack frame from the locked state.

7. The energy storage device according to claim 6, characterized in that: The baffle and the lower edge are an integral structure.

8. The energy storage device according to claim 3, characterized in that: It also includes a column fixed on the bracket, Wherein, at the position where the baffle plate rotates in the reverse direction and clamps the locking hook, the column blocks the unlocking hook from continuing to rotate in the reverse direction.

9. The energy storage device according to claim 1, characterized in that: The fixing device is arranged at the rear end of the battery pack frame.

10. The energy storage device according to claim 9, characterized in that: The bracket includes a pair of L-shaped brackets spaced apart laterally, with the transverse portions of each L-shaped bracket facing each other, Wherein, the fixed shaft is fixed on a vertical portion of the L-shaped bracket, and the locking hook is formed on a side wall of the battery pack frame facing the vertical portion.

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