Auxiliary supporting structure of cell stack

Abstract

The utility model discloses an auxiliary supporting structure of a cell stack, which comprises a supporting piece and a connecting piece, the supporting piece is of a strip-shaped structure, two ends of the supporting piece are respectively fixed between two end plates of the cell stack through the connecting piece, the supporting piece is positioned at the bottom of the cell stack, and the supporting piece and a screw rod of the cell stack are arranged in a staggered manner. The supporting piece is fixed between the end plates at the bottom of the battery stack through the connecting piece, so that the supporting piece plays a role in supporting the battery unit between the two end plates, liquid leakage of the battery stack caused by deformation of a screw rod due to downward sliding of the battery unit is avoided, and safe and stable operation of the liquid-cooled battery is ensured.

Description

Technical Field

[0001] The utility model relates to the technical field of liquid flow battery stacks, in particular to an auxiliary support structure of a battery stack. Background Art

[0002] The flow battery consists of a stack unit, electrolyte, electrolyte storage and supply unit, and management and control unit. It is a high-performance battery that uses positive and negative electrode electrolytes to circulate separately. It has the characteristics of high capacity, wide application range (environment), and long cycle life.

[0003] Liquid flow battery stacks typically consist of battery cells, screws, and end plates, with the screws used to press the cells between two end plates. However, because the cells rely on the compression provided by the end plates and the friction between them to maintain their position, during operation, due to thermal expansion and contraction and their own weight, the cells tend to slide downward and deform. This forces the entire force on the screws below, causing the screws to deform and alter the structure of the entire battery stack, leading to leakage in the battery stack and compromising the safe operation of the liquid-cooled battery.

[0004] Based on the above technical problems, the present invention proposes a battery stack auxiliary support structure. Utility Model Content

[0005] The purpose of this utility model is to provide an auxiliary support structure for a battery stack to solve the technical problems mentioned in the background art. The purpose of this utility model is achieved through the following technical solutions:

[0006] An auxiliary support structure for a battery stack includes a support member and a connector. The support member is a strip-shaped structure. Both ends of the support member are fixed between two end plates of the battery stack by connectors. The support member is located at the bottom of the battery stack, and the support member and the screw of the battery stack are staggered.

[0007] Furthermore, a buffer layer is provided between the support member and the battery stack.

[0008] Furthermore, the ends of the support member are connected to the end plates of the battery stack through two connecting members, and the connecting members are symmetrically arranged on both sides of the length direction of the support member.

[0009] Furthermore, there are at least two support members, and the support members are symmetrically distributed relative to the center of the battery stack.

[0010] Furthermore, the connecting member includes a first connecting plate and a second connecting plate that are perpendicular to each other. A first connecting hole is provided on the first connecting plate, and a screw passes through the first connecting hole to fix the first connecting plate to the end plate of the battery stack; a second connecting hole is provided on the second connecting plate, and a screw passes through the second connecting hole to fix the second connecting plate to the support member.

[0011] Furthermore, both the first connection hole and the second connection hole are oblong slot holes.

[0012] The technical solution provided by the embodiment of the present application has at least the following technical effects or advantages:

[0013] The support member is fixed between the end plates at the bottom of the battery stack through the connecting member, so that the support member plays a supporting role for the battery cells between the two end plates, avoiding the downward sliding of the battery cells and causing the screw rod to deform and resulting in liquid leakage of the battery stack, and ensuring the safe and stable operation of the liquid-cooled battery.

[0014] The connection holes are oblong slot holes to adjust the distance in two directions as sliding grooves, which can compensate for the dimensional tolerance of the fit between the distance between the end plates and the size of the connecting plate. Description of the Drawings

[0015] The specification drawings forming a part of the present application are used to provide a further understanding of the present utility model. The schematic embodiments and descriptions thereof of the present utility model are used to explain the present utility model and do not constitute an improper limitation to the present utility model.

[0016] Figure 1 It is the front view of the auxiliary support structure of the embodiment of the present application;

[0017] Figure 2 It is the top view of the auxiliary support structure of the embodiment of the present application;

[0018] Figure 3 It is the left view of the auxiliary support structure of the embodiment of the present application;

[0019] Figure 4 It is the front view of the first support method of the embodiment of the present application;

[0020] Figure 5 It is the bottom view of the first support method of the embodiment of the present application;

[0021] Figure 6 It is the front view of the second support method of the embodiment of the present application;

[0022] Figure 7 It is the bottom view of the second support method of the embodiment of the present application.

[0023] Reference signs in the drawings: 1, support member; 2, connecting member; 21, first connecting plate; 211, first connection hole; 22, second connecting plate; 221, second connection hole; 3, buffer pad; 4, outer end plate; 5, screw rod; 6, inner end plate. Detailed Embodiments

[0024] To better understand the above technical solution, the above technical solution will be described in detail below in conjunction with the accompanying drawings of the specification and specific embodiments. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. The following description of at least one exemplary embodiment is actually only illustrative and in no way limits the present invention and its application or use. Based on the embodiments in the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope of protection of the present invention.

[0025] Embodiment 1

[0026] As Figures 1 - 3 shown, an auxiliary support structure for a battery stack includes a support member 1, a connecting member 2, and a buffer pad 3. The support member 1 is a long strip structure with a rectangular cross-section. The support member 1 is made of a non-metallic material such as polypropylene (PP), polyethylene (PE), etc., which has excellent properties such as corrosion resistance and flame retardancy, and can effectively prevent dangers such as battery leakage and fire. The buffer pad 3 is a soft rubber pad, and the buffer pad 3 is laid on the upper surface of the support member 1 by means of bonding or mechanical fixing, so that the support member 1 contacts the battery unit through the buffer pad 3, playing a role in buffering and eliminating gaps.

[0027] Four connecting members 2 are symmetrically installed at both ends of the front and rear sides of the support member 1. The connecting member 2 is an L-shaped structure formed by connecting a first connecting plate 21 and a second connecting plate 22 that are perpendicular to each other. The first connecting plate 21 is flush with the end face of the support member 1, and a first connecting hole 211 is provided on the first connecting plate 21. By using a screw to pass through the first connecting hole 211, the first connecting plate 21 can be fixedly connected to the end plate of the battery stack. The second connecting plate 22 is perpendicular to the end face of the support member 1, and a second connecting hole 221 is provided on the second connecting plate 22. By using a screw to pass through the second connecting hole 221, the second connecting plate 22 is fixedly connected to the support member 1. By using bilateral four-point fixation, it can prevent the support member 1 from rotating relative to the screw during the flipping process of the battery stack. Preferably, both the first connecting hole 211 and the second connecting hole 221 are oblong slot holes, which can play an adjustment role and compensate for the dimensional difference in fitting.

[0028] Embodiment 2

[0029] As Figures 1 - 5 shown, it is an integral assembly method of the auxiliary support structure in the embodiment of the present application. Two support members 1 are symmetrically installed at the bottom of the battery stack relative to the center of the battery stack. Both ends of the support member 1 are respectively fixed between the two outermost end plates 4 of the battery stack through the connecting members 2, and the support member 1 is located between the battery stack screws 5 to avoid the force acting on the screw 5 and then being transmitted to the support member 1. The number of support members 1 can be more than two groups, and multiple groups of support members 1 are symmetrically distributed relative to the center of the battery stack to ensure the balance of force.

[0030] Example 3

[0031] As Figures 1 - 3 、 Figure 6 、 Figure 7 shown, it is the segmented assembly method of the auxiliary support structure in the embodiment of the present application. An installation position for installing the support member 1 is reserved at the lower end of the inner end plate 6 of the battery stack. Four support members 1 are symmetrically installed at the bottom of the battery stack relative to the center of the battery stack. Both ends of the support member 1 are respectively fixed between two inner end plates 6 of the battery stack through the connecting member 2, and the support member 1 is located between the battery stack screws 5 to prevent the force from acting on the screws 5 and then being transmitted to the support member 1. The number of support members 1 can be more than four groups, and multiple groups of support members 1 are symmetrically distributed relative to the center of the battery stack to ensure the balance of force.

[0032] The technical solution provided by the embodiment of the present application has at least the following technical effects or advantages:

[0033] The support member is fixed between the end plates at the bottom of the battery stack through the connecting member, so that the support member plays a supporting role for the battery cells between the two end plates, avoiding the downward slippage of the battery cells and causing the deformation of the screws, resulting in liquid leakage of the battery stack, and ensuring the safe and stable operation of the liquid-cooled battery.

[0034] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the orientation words such as "front, rear, upper, lower, left, right", "horizontal, vertical, perpendicular, horizontal" and "top, bottom" is usually based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present invention and simplifying the description. Without contrary description, these orientation words do not indicate and imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, so it cannot be understood as a limitation on the protection scope of the present invention: the orientation words "inside, outside" refer to the inside and outside relative to the contour of each component itself.

[0035] It should be noted that the use of words such as "first" and "second" to limit the components is only for the convenience of distinguishing the corresponding components. Without additional statement, the above words have no special meaning, so it cannot be understood as a limitation on the protection scope of the present invention.

[0036] The above are only the preferred embodiments of the present invention and are not used to limit the present invention. For those skilled in the art, the present invention can have various changes and modifications. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. An auxiliary support structure for a battery stack, characterized in that It includes a support member and a connecting member. The support member is a strip structure. The two ends of the support member are respectively fixed between the two end plates of the battery stack through the connecting member. The support member is located at the bottom of the battery stack, and the support member and the screw of the battery stack are staggered.

2. The auxiliary support structure of a battery stack according to claim 1, wherein, A buffer layer is provided between the support member and the battery stack.

3. The auxiliary support structure of a battery stack according to claim 1, characterized in that, The ends of the support member are connected to the end plates of the battery stack through two connecting members, and the connecting members are symmetrically arranged on both sides of the length direction of the support member.

4. An auxiliary support structure for a battery stack according to claim 1, characterized in that There are at least two support members, and the support members are symmetrically distributed relative to the center of the battery stack.

5. An auxiliary support structure for a battery stack according to claim 1, characterized in that, The connecting member includes a first connecting plate and a second connecting plate that are perpendicular to each other. A first connecting hole is provided on the first connecting plate, and a screw passes through the first connecting hole to fix the first connecting plate to the end plate of the battery stack; a second connecting hole is provided on the second connecting plate, and a screw passes through the second connecting hole to fix the second connecting plate to the support member.

6. The auxiliary support structure of a battery stack according to claim 5, wherein, The first connecting hole and the second connecting hole are both oblong slots.

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