Electric pile end part structure and flow battery electric pile

Abstract

The utility model discloses an electric pile end part structure and a flow battery electric pile, and belongs to the technical field of energy storage batteries. The electric pile end part structure comprises an end plate, an insulating plate and an end collector plate, the insulating plate is arranged on the end plate, the end collector plate is arranged on one surface, deviating from the end plate, of the insulating plate, a tab is arranged on the end collector plate, and the tab can sequentially penetrate through a first through hole in the insulating plate and a second through hole in the end plate. One end, far away from the end collector plate, of the tab penetrates through the first through hole and the second through hole and then can protrude out of the end surface, far away from the end collector plate, of the end plate, so that the tab extends out of the end part of the galvanic pile, thereby effectively preventing the tab from extending out of two sides of the galvanic pile and occupying the space of the side part of the galvanic pile; and modular integrated assembly of a plurality of electric piles with a compact structure can be conveniently realized. Besides, when a plurality of electric piles assembled in a modularized and integrated manner are connected in series and in parallel, the tabs of all the electric piles extend out of the end parts of the electric piles, so that the wiring and later maintenance work of the tabs are facilitated.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the technical field of energy storage battery, in particular, relate to a kind of electric pile end structure and flow battery electric pile. BACKGROUND

[0002] Flow battery is a new energy storage battery, and the electric pile structure of flow battery usually includes a plurality of series-connected single cells, and end collector plates are arranged at both ends of the electric pile for connecting each electric pile and collecting current. An insulating plate and an end plate are sequentially arranged on the outer side of the end collector plate. Currently, the tab is arranged on the side of the end collector plate, so that the end collector plate directly extends the tab from both sides of the electric pile. When modularizing and assembling multiple electric piles, the tabs extending from both sides of each electric pile occupy a certain space, so it is necessary to reserve space for avoiding the tabs and wiring on the side of each electric pile. This not only makes it difficult to realize the modular integrated assembly of multiple electric piles with compact structure, but also leads to complex wiring when connecting multiple electric piles in series and parallel, which is not convenient for tab wiring and later maintenance. SUMMARY

[0003] To solve the problem of the tabs extending from both sides of the electric pile occupying the space on the side of the electric pile and making it difficult to realize the modular integrated assembly of multiple electric piles with compact structure in the prior art, the utility model embodiment aims to provide an electric pile end structure.

[0004] To achieve the above-mentioned purpose, the utility model adopts the technical scheme of providing an electric pile end structure, comprising:

[0005] an end plate;

[0006] an insulating plate arranged on the end plate;

[0007] an end collector plate arranged on one side of the insulating plate away from the end plate; and

[0008] a tab arranged on the end collector plate, a first through hole for the tab to pass through is formed on the insulating plate, a second through hole for the tab to pass through is formed on the end plate, the second through hole is arranged corresponding to the first through hole, and the second through hole is in communication with the first through hole, and the tab can pass through the first through hole and the second through hole in sequence to protrude from the end surface of the end plate away from the end collector plate.

[0009] Further, the first end of the tab is connected to the side of the end collector plate, and the second end of the tab protrudes from the end plate.

[0010] Further, the tab is bent from one side of the end collector plate towards the end plate, and one end of the tab away from the end collector plate protrudes from the end plate.

[0011] Further, the number of the tab is 2, one of the tab is arranged on one side of the end current collecting plate, and the other of the tab is arranged on the other side of the end current collecting plate, the insulating plate is respectively provided with a first through hole for each of the tab, and the end plate is respectively provided with a second through hole corresponding to each of the first through hole for each of the tab.

[0012] Further, the stack end structure further comprises a terminal box arranged on the end plate, and the tab protruding from the end of the end plate is accommodated in the terminal box.

[0013] Further, the stack end structure further comprises an insulating sealing element arranged in the second through hole, and the insulating sealing element can separate the inner hole wall of the second through hole and the outer peripheral surface of the tab.

[0014] Further, the insulating sealing element is an elastic insulating sealing sleeve, the elastic insulating sealing sleeve is sleeved on the tab, and the outer peripheral surface of the elastic insulating sealing sleeve abuts against the inner hole wall of the second through hole.

[0015] Further, the tab is in a sheet structure, and a stress release groove is arranged at the connection between the tab and the end current collecting plate.

[0016] Another purpose of the embodiment of the utility model is to provide a flow battery stack, so as to solve the problem that the tabs protruding from both sides of the stack occupy the space of the side of the stack and it is difficult to realize the modular integrated assembly of multiple stacks.

[0017] To achieve the above purpose, the utility model adopts the technical scheme of providing a flow battery stack comprising the stack end structure provided by any of the above embodiments.

[0018] Further, the flow battery stack comprises two stack end structures and a plurality of series-connected single cells, the plurality of series-connected single cells are arranged between the two stack end structures, and the single cells close to the stack end structures are electrically connected with the end current collecting plates of the corresponding stack end structures.

[0019] Compared with the prior art, the above one or more technical solutions in the embodiment of the utility model have at least one of the following beneficial effects:

[0020] The electric pile end structure and the flow battery electric pile in the embodiment of the utility model, electric pile end structure includes end plate, insulating plate and end current collector plate, through setting up insulating plate on end plate, setting up end current collector plate on the side of insulating plate away from end plate, and setting up pole lug on end current collector plate, pole lug can pass through first through hole on insulating plate, second through hole on end plate in proper order. The end of pole lug away from end current collector plate passes through first through hole, second through hole after, can protrude on the end face of end plate away from end current collector plate, make pole lug protrude from the end of electric pile, pole lug and electric pile inlet and outlet liquid pipeline all protrude from the end of electric pile, thereby effectively avoid pole lug protrude from the both sides of electric pile and occupy the space of electric pile side, facilitate realizing the modular integrated assembly of compact structure to multiple electric piles. In addition, when multiple electric piles of modular integrated assembly are connected in series-parallel, the pole lug of each electric pile protrudes from the end of electric pile, facilitating the wiring and later maintenance work of pole lug.

[0021] The electric pile end structure in the embodiment of the utility model, because the distance of electric pile side after the modular integrated assembly of multiple electric piles is greatly reduced, and the second end of pole lug protruding on end plate is also located on the side of end plate, therefore, the pole lug interval between adjacent electric piles is very close, can greatly shorten the length of cable required when adjacent electric piles are connected in series-parallel, reduce the cost and line resistance of this part of cable. BRIEF DESCRIPTION OF DRAWINGS

[0022] In order to more clearly illustrate the technical scheme in the embodiment of the utility model, the drawings needed to be used in the embodiment or prior art description will be briefly introduced below, and obviously, the drawings in the following description are only some embodiments of the utility model, and other drawings can be obtained according to these drawings without creative labor for those skilled in the art.

[0023] Figure 1 The three-dimensional structure schematic diagram of the electric pile end structure provided for the embodiment of the utility model is provided.

[0024] Figure 2 The front view structure schematic diagram of the electric pile end structure provided for the embodiment of the utility model is provided.

[0025] Figure 3 The side view structure schematic diagram of the electric pile end structure provided for the embodiment of the utility model is provided.

[0026] Figure 4 The cross-sectional structure schematic diagram of the electric pile end structure provided for the embodiment of the utility model is provided.

[0027] Figure 5 The three-dimensional structure schematic diagram of the electric pile end structure provided for the embodiment of the utility model is provided. Figure 4 The local amplification structure schematic diagram of the part A in the embodiment of the utility model is provided.

[0028] Figure 6An assembly drawing of the end current collecting plate and the tab provided by the embodiment of the utility model;

[0029] Figure 7 For Figure 6 The local amplification structure schematic view of the middle B part;

[0030] Figure 8 The explosion view of the stack end structure provided by the embodiment of the utility model;

[0031] Figure 9 The structure schematic view of the flow battery stack provided by the embodiment of the utility model;

[0032] Figure 10 The assembly drawing of the multiple stack modular integration provided by the embodiment of the utility model.

[0033] Among them, the various reference signs in the drawing are:

[0034] 1 - end plate;11 - end face;

[0035] 2 - insulating plate;3 - end current collecting plate;4 - tab;

[0036] 5 - junction box;6 - insulating sealing element;

[0037] 7 - stress release groove;8 - first through hole;9 - second through hole;

[0038] 10 - single cell;20 - stack end structure. Specific embodiments

[0039] In order to make the technical problem, technical scheme and beneficial effect to be solved by the utility model more clear and obvious, the utility model is further explained in detail below by combining with the drawings and embodiments.It should be understood that the specific embodiments described here are only used to explain the utility model, and are not used to limit the utility model.

[0040] It should be noted that when an element is referred to as being "connected to" or "set on" another element, it can be directly on the other element or indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or indirectly connected to the other element. In addition, the terms "first", "second" are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined with "first", "second" can explicitly or implicitly include one or more of the features. In the description of the utility model, the meaning of "multiple" is two or more than two, unless otherwise specifically limited. In the description of the utility model, it should be noted that, unless otherwise specifically defined and limited, the terms "mounting", "connection", "connection" should be broadly understood, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the internal communication of two elements or the interaction relationship between two elements. For ordinary skilled in the art, the specific meaning of the above terms in the utility model can be understood according to the specific circumstances.

[0041] Throughout the specification, reference to "one embodiment" or "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment is included in at least one embodiment of the application. Therefore, the appearance of the phrases "in one embodiment", "in some embodiments", or "in some embodiments" in various places throughout the specification are not all referring to the same embodiment. In addition, in one or more embodiments, specific features, structures, or characteristics can be combined in any suitable manner.

[0042] Please refer to Figures 1 to 8 , now the stack end structure 20 provided by the embodiment of the utility model will be described. Please further refer to Figure 1 、 Figure 2 and Figure 8The utility model discloses an electric pile end structure 20, including end plate 1, insulating plate 2 and end current collector plate 3, end plate 1 is used for pressing electric pile structure, insulating plate 2 sets up on end plate 1, end current collector plate 3 sets up on the one side of insulating plate 2 away from end plate 1, end plate 1, insulating plate 2 and end current collector plate 3 are parallel to each other, make insulating plate 2 separate between end plate 1 and end current collector plate 3, prevent end plate 1 and end current collector plate 3 contact and produce conduction. The tab 4 sets up on end current collector plate 3, the first through -hole 8 for tab 4 to pass through is seted up on insulating plate 2, the second through -hole 9 for tab 4 to pass through is seted up on end plate 1, the second through -hole 9 is correspondingly seted up with the first through -hole 8, and the second through -hole 9 is communicated with the first through -hole 8, and tab 4 can pass through the first through -hole 8 on insulating plate 2, the second through -hole 9 on end plate 1 in proper order. The end of tab 4 away from end current collector plate 3 passes through the first through -hole 8, the second through -hole 9 after, can protrude on the end surface 11 of end plate 1 away from end current collector plate 3, to make tab 4 by the end of electric pile protrude, tab 4 and electric pile inlet and outlet liquid pipeline (the pipeline is the prior art structure, not shown in the drawing) all by the end of electric pile protrude, effectively avoid tab 4 by the both sides of electric pile protrude and occupy the space of electric pile side, and then realize the modular integrated assembly of compact structure to multiple electric piles, and the combination structure of multiple electric pile modular integrated assembly is as shown in Figure 10 It should be noted that the end of the electric pile refers to the end surface 11 of the end plate 1 away from the end current collector plate 3, and the side of the electric pile refers to all side surface parts of the electric pile except the end surface 11 of the end plate 1 away from the end current collector plate 3. The end plate 1 is made of metal material, the insulating plate 2 is made of insulating material such as plastic, and the end current collector plate 3 is a conductive plate such as a copper plate.

[0043] The electric pile end structure 20 provided by the utility model embodiment, compared with the prior art, by setting the insulating plate 2 on the end plate 1, setting the end current collector plate 3 on the side of the insulating plate 2 away from the end plate 1, and setting the tab 4 on the end current collector plate 3, the tab 4 can pass through the first through -hole 8 on the insulating plate 2 and the second through -hole 9 on the end plate 1 in proper order. The end of the tab 4 away from the end current collector plate 3 passes through the first through -hole 8 and the second through -hole 9, and can protrude on the end surface 11 of the end plate 1 away from the end current collector plate 3, so that the tab 4 protrudes from the end of the electric pile, and the tab 4 and the electric pile inlet and outlet liquid pipeline all protrude from the end of the electric pile, thereby effectively avoiding the tab 4 protruding from the sides of the electric pile and occupying the space of the side of the electric pile, facilitating the modular integrated assembly of compact structure to multiple electric piles. In addition, when the multiple electric piles in the modular integrated assembly are connected in series and parallel, the tabs 4 of the electric piles all protrude from the end of the electric pile, facilitating the wiring of the tabs 4 and the later maintenance work.

[0044] Please refer to Figure 1 , Figure 4 and Figure 5In some embodiments, the tab 4 has a first end and a second end, the first end of the tab 4 is connected to the side of the end current collecting plate 3, so that the tab 4 is arranged on the side of the end current collecting plate 3, and the second end of the tab 4 protrudes from the end plate 1 through the first through hole 8 on the insulating plate 2 and the second through hole 9 on the end plate 1 in sequence, which can reduce the space occupied by the flow battery in the direction of the structure plate of the stack, and the end current collecting plate 3 and the tab 4 are relatively independent in structure and size, so that the tab 4 is less limited by the size of the end current collecting plate 3. The tab 4 is arranged on the side of the end current collecting plate 3, and the second end of the tab 4 protruding from the end plate 1 is also located at the side of the end plate 1. As shown in Figure 10 , after the modular integrated assembly of a plurality of stacks, the distance between the sides of the stacks is greatly reduced, and the tabs 4 between adjacent stacks are very close, which can greatly shorten the length of the cables used when the adjacent stacks are connected in series and parallel, reduce the cost and line resistance of the cables.

[0045] Please refer to Figure 5 , Figure 6 and Figure 7 , in some embodiments, the tab 4 is formed by bending one side of the end current collecting plate 3 towards the end plate 1, which not only helps to reduce the connection process of the tab 4 and the end current collecting plate 3, but also enhances the connection strength between the tab 4 and the end current collecting plate 3, and maximally avoids the influence of the connection between the tab 4 and the end current collecting plate 3 on the flatness of the end current collecting plate 3, without increasing the contact resistance between the end current collecting plate 3 and the bipolar plate. The included angle between the tab 4 and the end current collecting plate 3 is a right angle, and the end of the tab 4 away from the end current collecting plate 3 protrudes from the end plate 1 through the first through hole 8 on the insulating plate 2 and the second through hole 9 on the end plate 1 in sequence.

[0046] Please refer to Figure 2 , Figure 4 and Figure 6 , in some embodiments, the number of tabs 4 provided on one end current collecting plate 3 is 2, and the two tabs 4 are respectively arranged on the two sides of the end current collecting plate 3. The insulating plate 2 is respectively provided with first through holes 8 for the tabs 4 to pass through, and the end plate 1 is respectively provided with second through holes 9 corresponding to the positions of the first through holes 8 for the corresponding tabs 4 to pass through. The provision of two tabs 4 on one end current collecting plate 3 facilitates the modular assembly of the stacks. In this embodiment, by arranging two tabs 4 on the two sides of the end current collecting plate 3 respectively, the two tabs 4 protrude from the end plate 1 after passing through the corresponding first through holes 8 on the insulating plate 2 and the corresponding second through holes 9 on the end plate 1 respectively, and the two tabs 4 protrude from the end of the stack, thereby effectively avoiding the occupation of the space on the side of the stack by the tabs 4 protruding from the two sides of the stack, and facilitating the modular integrated assembly and transportation of a plurality of stacks with compact structure. In addition, when the modular integrated assembly of a plurality of stacks is connected in series and parallel, the tabs 4 of each stack protrude from the end of the stack, which facilitates the wiring of the tabs 4 and the later maintenance work.

[0047] Please refer to Figure 3 、 Figure 4 and Figure 8 In some embodiments, the stack end structure 20 further comprises a terminal box 5 arranged on the end plate 1, and the tab 4 protrudes from the end of the end plate 1 and is accommodated in the terminal box 5. Not only can the terminal box 5 protect the tab 4 protruding from the end plate 1, but also can better protect the safety of personnel and the cable electrically connected to the tab 4.

[0048] Please refer to Figure 4 、 Figure 5 In some embodiments, the stack end structure 20 further comprises an insulating sealing member 6 arranged in the second through hole 9, and the insulating sealing member 6 can separate the inner hole wall of the second through hole 9 and the outer circumferential surface of the tab 4. The insulating sealing member 6 plays a sealing and insulating role, which can not only avoid the contact between the tab 4 and the inner hole wall of the second through hole 9 to cause the end plate 1 to be electrified, but also can improve the sealing of the second through hole 9 and effectively prevent the electrolyte from leaking through the second through hole 9.

[0049] Please refer to Figure 5 In some embodiments, in order to improve the sealing and the convenience of installation, the insulating sealing member 6 is an elastic insulating sealing sleeve, the elastic insulating sealing sleeve is sleeved on the tab 4, and the outer circumferential surface of the elastic insulating sealing sleeve abuts against the inner hole wall of the second through hole 9. The elastic insulating sealing sleeve plays a sealing and insulating role, which can not only avoid the contact between the tab 4 and the inner hole wall of the second through hole 9 to cause the end plate 1 to be electrified, but also can further improve the sealing of the second through hole 9 and effectively prevent the electrolyte from leaking through the second through hole 9.

[0050] Please refer to Figure 6 and Figure 7 In some embodiments, a stress release groove 7 is arranged at the connection position of the tab 4 and the end current collector 3, and the stress release groove 7 releases the stress of the tab 4 acting on the end current collector 3, which is beneficial to avoid the fracture damage caused by the stress that cannot be released at the connection position of the end current collector 3 and the tab 4.

[0051] Please refer to Figure 9 The utility model embodiment further provides a flow battery stack, and the flow battery stack comprises the stack end structure 20 provided in any one of the above embodiments. Since the flow battery stack has all the technical features of the stack end structure 20 provided in any one of the above embodiments, the flow battery stack has the same technical effects as the stack end structure 20.

[0052] Please refer to Figure 9In some embodiments, the flow battery stack includes two stack end structures 20 and a number of single cells 10 in series, the number of single cells 10 in series being disposed between the two stack end structures 20, the single cells 10 proximate to each stack end structure 20 being electrically connected to the end current collector plate 3 of the respective stack end structure 20.

[0053] The above merely describes the preferred embodiments of the present application and is not intended to limit the present application, and any modification, equivalent replacement, and improvement within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A stack end structure, characterized by, The application relates to a stack end structure. The application relates to a stack end structure. The application relates to a stack end structure. The application relates to a stack end structure. The application relates to a stack end structure. The application relates to a stack end structure.

2. The stack end structure of claim 1, wherein The application relates to a stack end structure.

3. The stack end structure of claim 1, wherein The application relates to a stack end structure.

4. The stack end structure of claim 1, wherein The application relates to a stack end structure.

5. The stack end structure of claim 1, wherein The application relates to a stack end structure.

6. The stack end structure of claim 1, wherein The application relates to a stack end structure.

7. The stack end structure of claim 6, wherein The application relates to a stack end structure.

8. The stack end structure of any one of claims 1 to 7, wherein, The application relates to a stack end structure.

9. A flow battery stack, characterized by The application relates to a stack end structure.

10. The flow battery stack of claim 9, wherein, The application relates to a stack end structure. The application relates to a stack end structure. The application relates to a stack end structure. The application relates to a stack end structure. The application relates to a stack end structure. The application relates to a stack end structure. The application relates to a stack end structure. The application relates to a stack end structure. The application relates to a stack end structure. The application relates to a stack end structure. The application relates to a stack end structure. The application relates to a stack end structure. The application relates to a stack end structure. The application relates to a stack end structure. The application relates to a stack end structure. The application relates to a stack end structure. The application relates to a stack end structure. The application relates to a stack end structure. The application relates to a stack end structure. 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