Battery pole frame and battery

Abstract

The utility model provides a battery pole frame and a battery, a pole frame main body is configured to be an annular structure with an inner ring through hole, the pole frame main body is provided with a distribution flow channel, and the distribution flow channel is located on at least one of a first frame body surface and a second frame body surface. The distribution flow channel comprises at least two levels of hierarchical flow channels which are sequentially communicated in the preset flowing direction, the sizes of the multiple hierarchical flow channels are gradually reduced in the preset flowing direction, and the distribution precision of the multiple hierarchical flow channels is gradually improved. According to the battery pole frame disclosed by the invention, the two surfaces of the pole frame main body are utilized, and the plurality of levels of hierarchical flow channels are designed when the distribution flow channels are constructed, so that the area of the pole frame main body can be fully utilized, and the plurality of levels of hierarchical flow channels capable of carrying out multi-level fluid distribution are constructed in a limited area; the distribution effect of the fluid is improved, so that the material of the pole frame main body is fully utilized, and the technical problems of low space utilization rate and waste of the pole frame material of the existing battery pole frame are effectively solved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of batteries, in particular to a battery pole frame and a battery. BACKGROUND

[0002] The zinc-iron flow battery pole frame is a key component in the zinc-iron flow battery. The battery pole frame is usually a rectangular or square ring structure with a rectangular through hole in the middle for accommodating electrode components. The opposite sides of the rectangular through hole of the battery pole frame have trapezoidal through holes to increase the flow area and contact area of the electrolyte. The flow channel of the battery pole frame can include an electrolyte inlet flow channel, an outlet flow channel, and an inlet distribution flow channel and an outlet distribution flow channel connected to the middle through hole. These flow channels generally exist in the form of grooves on one side surface of the flat plate, which can make the electrolyte flow uniformly into and out of the electrode frame, ensuring the stable progress of the electrochemical reaction.

[0003] The battery pole frame provides fixation and support for electrode, diaphragm and other components, ensures the accurate relative position of the components in the battery, stabilizes the battery structure, and ensures the orderly progress of the electrochemical reaction. In addition, by designing a reasonable flow channel, the electrolyte can be uniformly distributed on the surface of the electrode, increasing the contact area and reaction efficiency of the electrolyte and the electrode, reducing the concentration polarization phenomenon, and improving the performance and charging and discharging efficiency of the battery.

[0004] However, the structure design of the existing battery pole frame has a large distribution area, low space utilization, and the technical problem of waste of pole frame material. CONTENT OF THE INVENTION

[0005] Therefore, it is necessary to provide a battery pole frame and a battery to solve the above technical problems.

[0006] The present application provides a battery pole frame, which comprises:

[0007] A pole frame body configured as a ring structure with an inner ring through hole, and the pole frame body has first and second frame surfaces facing opposite directions;

[0008] The pole frame body is provided with a distribution flow channel, and the distribution flow channel is located in at least one of the first and second frame surfaces; wherein the distribution flow channel comprises at least two levels of hierarchical flow channels sequentially connected in a preset flow direction, and along the preset flow direction, the flow channel size of the hierarchical flow channels gradually decreases, and the distribution accuracy of the hierarchical flow channels gradually increases.

[0009] In one embodiment, each hierarchical flow channel comprises a plurality of unit flow channels arranged side by side; and / or,

[0010] The plurality of hierarchical flow channels of the distribution flow channel are arranged on the first frame surface and the second frame surface, respectively; and / or,

[0011] The plurality of hierarchical flow channels are configured as at least one of a groove channel and a cavity channel of the pole frame body.

[0012] In one embodiment, the distribution flow channel includes five hierarchical flow channels sequentially connected in a preset flow direction, and the five hierarchical flow channels are a first hierarchical flow channel, a second hierarchical flow channel, a third hierarchical flow channel, a fourth hierarchical flow channel, and a fifth hierarchical flow channel sequentially connected in the preset flow direction.

[0013] In one embodiment, the first hierarchical flow channel is located on the first frame surface of the pole frame body, and the first hierarchical flow channel includes a plurality of first unit flow channels configured as groove flow channels on the first frame surface.

[0014] In one embodiment, the second hierarchical flow channel is located on the first frame surface of the pole frame body, and the second hierarchical flow channel includes a plurality of second unit flow channels configured as groove flow channels on the second frame surface, and the first hierarchical flow channel and the second hierarchical flow channel are in communication.

[0015] The flow channel width of each second unit flow channel is less than the flow channel width of any first unit flow channel, and the number of first unit flow channels of the first hierarchical flow channel is less than the number of second unit flow channels of the second hierarchical flow channel, and each first unit flow channel is in communication with at least two second unit flow channels.

[0016] In one embodiment, a first flow splitting element is arranged in a part of the flow channel of the plurality of first unit flow channels, and the part of the flow channel of each first unit flow channel is configured to be divided into a plurality of second unit flow channels based on the first flow splitting element;

[0017] The third hierarchical flow channel includes a plurality of third unit flow channels configured as cavity flow channels penetrating the first frame surface and the second frame surface of the pole frame body, and the second hierarchical flow channel and the third hierarchical flow channel are in communication.

[0018] In one embodiment, the fourth hierarchical flow channel is located on the second frame surface of the pole frame body, and the fourth hierarchical flow channel includes a plurality of fourth unit flow channels configured as groove flow channels on the second frame surface, and the third hierarchical flow channel and the fourth hierarchical flow channel are in communication.

[0019] The fourth unit flow channels of the fourth level flow channel are less in number than the fifth unit flow channels of the fifth level flow channel, and each of the fourth unit flow channels simultaneously communicates with at least two of the fifth unit flow channels.

[0020] In one of the embodiments, the fifth level flow channel is located on the second frame surface of the polar frame body, and the fifth level flow channel comprises a plurality of fifth unit flow channels configured as groove flow channels opened on the second frame surface, and the fourth level flow channel communicates with the fifth level flow channel.

[0021] The fourth unit flow channels of the fourth level flow channel are less in number than the fifth unit flow channels of the fifth level flow channel, and each of the fourth unit flow channels simultaneously communicates with at least two of the fifth unit flow channels.

[0022] In one of the embodiments, a plurality of second flow distribution elements are arranged in part of the flow channel area of the fourth unit flow channel, and the gap between adjacent second flow distribution elements is configured to form the fifth unit flow channel.

[0023] The application provides a battery, which comprises the battery polar frame.

[0024] In the battery polar frame and the battery, the battery polar frame of the application makes full use of the two surfaces of the polar frame body and designs a plurality of level flow channels when constructing the distribution flow channel, so that the area of the polar frame body is fully utilized, a plurality of level flow channels capable of multi-stage fluid distribution are constructed in a limited area, the fluid distribution effect is greatly improved, the material of the polar frame body is fully utilized, and the technical problems of low space utilization rate and waste of polar frame material of the existing battery polar frame are effectively solved. BRIEF DESCRIPTION OF DRAWINGS

[0025] Figure 1 The figure is a plan view of the first frame surface of the battery polar frame provided in one of the embodiments of the application.

[0026] Figure 2 The figure is a perspective view of the first frame surface of the battery polar frame provided in one of the embodiments of the application.

[0027] Figure 3 The figure is a plan view of the second frame surface of the battery polar frame provided in one of the embodiments of the application.

[0028] Figure 4 The figure is a perspective view of the second frame surface of the battery polar frame provided in one of the embodiments of the application.

[0029] REFERENCE NUMERALS:

[0030] 1000, pole frame body; 2000, inner ring through hole; 3000, distribution flow channel;

[0031] 4000, positive electrode liquid inlet; 5000, positive electrode liquid outlet; 6000, negative electrode liquid inlet; 7000, negative electrode liquid outlet;

[0032] 1001, first frame surface; 1002, second frame surface;

[0033] 3100, first level flow channel; 3200, second level flow channel; 3300, third level flow channel; 3400, fourth level flow channel; 3500, fifth level flow channel;

[0034] 3101, first unit flow channel; 3201, second unit flow channel; 3202, first flow distribution element; 3301, third unit flow channel; 3401, fourth unit flow channel; 3501, fifth unit flow channel; 3502, second flow distribution element. DETAILED DESCRIPTION

[0035] In order to make the above objectives, features and advantages of the present application more apparent, specific embodiments of the present application will be described in detail below with reference to the accompanying drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present application. However, the present application can be practiced in a number of different ways beyond the specific embodiments described herein and by one of ordinary skill in the art without departing from the spirit of the present application, and it is therefore intended that all such variations be considered as falling within the scope of the present application. It should be noted that the following detailed description is intended only to be illustrative and not restrictive of the present application.

[0036] In the description of the present application, it should be understood that if these terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like appear, these terms indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the purpose of facilitating the description of the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0037] In addition, if these terms "first", "second" appear, these terms are only for the purpose of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the technical features indicated. Therefore, the features limited by "first", "second" can explicitly or implicitly include at least one of the features. In the description of the present application, if the term "multiple" appears, the meaning of "multiple" is at least two, for example, two, three, etc., unless otherwise specifically limited.

[0038] In the present application, unless specifically defined otherwise, if there are terms such as "mount", "connect", "connect", "fix", and the like, these terms should be understood in a broad sense. For example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; 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, unless otherwise explicitly defined. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0039] In the present application, unless specifically defined otherwise, if there are similar descriptions such as "on" or "below" the first feature of the second feature, it can mean that the first and second features are in direct contact, or the first and second features are indirectly in contact through an intermediate medium. Moreover, the first feature "above", "above" and "above" the second feature can be directly above or obliquely above the second feature, or only indicates that the horizontal height of the first feature is higher than that of the second feature. The first feature "below", "below" and "below" the second feature can be directly below or obliquely below the second feature, or only indicates that the horizontal height of the first feature is less than that of the second feature.

[0040] It should be noted that if an element is referred to as "fixed to" or "disposed on" another element, it can be directly on another element or there can be a middle element. If an element is considered to be "connected" to another element, it can be directly connected to another element or there can be a middle element. If present, the terms "vertical", "horizontal", "up", "down", "left", "right" and similar expressions used in the present application are only for illustrative purposes and do not represent the only implementation.

[0041] The present application provides a battery, which includes a battery pole frame and essential components such as electrodes, separators, etc. See Figures 1 to 4As shown, the battery pole frame mentioned above comprises a pole frame body 1000 configured as a ring structure with an inner ring through hole 2000, for example, the pole frame body 1000 is a rectangular ring structure, and the inner ring through hole is a rectangular through hole, which is not limited herein. Wherein, the pole frame body 1000 has a first frame surface 1001 and a second frame surface 1002 facing each other, which are two surfaces of the pole frame body 1000, and the pole frame body 1000 is provided with a distribution flow channel 3000. In the present application, the distribution flow channel 3000 is limited to be arranged in at least one of the first frame surface 1001 and the second frame surface 1002, that is, the distribution flow channel 3000 can be arranged on the first frame surface 1001, or on the second frame surface 1002, or on both the first frame surface 1001 and the second frame surface 1002.

[0042] As can be seen from the above, the distribution flow channel 3000 can utilize the first frame surface 1001 and the second frame surface 1002 of the pole frame body 1000, that is, both surfaces of the distribution flow channel 3000 can be utilized at the same time, and at the same time, the distribution flow channel 3000 can be limited to comprise at least two hierarchical flow channels sequentially connected in a preset flow direction. Wherein, along the preset flow direction, the flow channel size of at least part of the hierarchical flow channels gradually decreases, and the distribution accuracy of at least part of the hierarchical flow channels gradually increases, for example, the flow channel size of the hierarchical flow channels gradually decreases, and the distribution accuracy of the hierarchical flow channels gradually increases.

[0043] Therefore, the battery pole frame of the present application utilizes both surfaces of the pole frame body 1000, and designs several hierarchical flow channels when constructing the distribution flow channel 3000, so that the area of the pole frame body 1000 is fully utilized, and several hierarchical flow channels capable of multi-stage fluid distribution are constructed in a limited area, which greatly improves the fluid distribution effect, so that the material of the pole frame body 1000 is fully utilized, effectively solving the technical problems of low space utilization rate and waste of pole frame material of the existing battery pole frame.

[0044] In the several-stage hierarchical flow channels connected in sequence along the preset flow direction, the hierarchical flow channel at the head end in the preset flow direction can be used to connect the positive electrode liquid inlet 4000 or the negative electrode liquid inlet 6000, so as to inject the positive electrode liquid or the negative electrode liquid into the distribution flow channel 3000 through the positive electrode liquid inlet 4000 or the negative electrode liquid inlet 6000. At the same time, in the several-stage hierarchical flow channels connected in sequence along the preset flow direction, the hierarchical flow channel at the tail end in the preset flow direction can be used to connect the positive electrode liquid outlet 5000 or the negative electrode liquid outlet 7000, so as to lead out the positive electrode liquid or the negative electrode liquid through the positive electrode liquid outlet 5000 or the negative electrode liquid outlet 7000, for example, to lead the positive electrode liquid or the negative electrode liquid into the reaction area.

[0045] The skilled in the art can design several-stage hierarchical flow channels according to actual needs, for example, refer to Figure 1 As shown in the figure, two sets of several-stage hierarchical flow channels can be provided, respectively located on both sides of the pole frame body 1000. One set of several-stage hierarchical flow channels is used to connect the positive electrode liquid inlet 4000 and the positive electrode liquid outlet 5000 to realize the flow of the positive electrode liquid. The other set of several-stage hierarchical flow channels is used to connect the negative electrode liquid inlet 6000 and the negative electrode liquid outlet 7000 to realize the flow of the negative electrode liquid, which is limited here.

[0046] The above-mentioned multi-stage hierarchical flow channels can be set according to needs. For example, in order to ensure the efficiency of fluid flow, in one embodiment, each of the hierarchical flow channels can include several parallelly arranged unit flow channels. The fluid can flow along several unit flow channels of the same hierarchical flow channel at the same time to improve the efficiency of flow. Moreover, the several hierarchical flow channels can be configured as at least one of the groove channel and the cavity channel provided in the pole frame body 1000, and then arranged on the first frame surface 1001 and the second frame surface 1002 in the pole frame body 1000 through the combination of the groove channel and the cavity channel.

[0047] In one embodiment, the distribution flow channel 3000 can include five-stage hierarchical flow channels connected in sequence along the preset flow direction. The five-stage hierarchical flow channels are respectively the first hierarchical flow channel 3100, the second hierarchical flow channel 3200, the third hierarchical flow channel 3300, the fourth hierarchical flow channel 3400 and the fifth hierarchical flow channel 3500 connected in sequence along the preset flow direction. In addition, the skilled in the art can set the number of hierarchical flow channels to other quantities according to needs, which is not limited here.

[0048] Refer to Figures 1 to 4As shown, in one embodiment, the first-level flow channel 3100 is located on the first frame surface 1001 of the pole frame body 1000, and the first-level flow channel 3100 includes a plurality of first unit flow channels 3101 configured as groove flow channels on the first frame surface 1001. The second-level flow channel 3200 is located on the first frame surface 1001 of the pole frame body 1000, and the second-level flow channel 3200 includes a plurality of second unit flow channels 3201 configured as groove flow channels on the second frame surface 1002. The first-level flow channel 3100 and the second-level flow channel 3200 are in communication, wherein the flow channel width of each second unit flow channel 3201 is less than the flow channel width of any first unit flow channel 3101, and the number of first unit flow channels 3101 of the first-level flow channel 3100 is less than the number of second unit flow channels 3201 of the second-level flow channel 3200. Each first unit flow channel 3101 simultaneously communicates at least two second unit flow channels 3201.

[0049] In the construction of the second-level flow channel 3200, in one embodiment, a first flow dividing element 3202 can be arranged in a part of the flow channel of each first unit flow channel 3101, and the second unit flow channel 3201 is constructed by means of the part of the flow channel of the first unit flow channel 3101, which is the downstream flow channel segment of the first unit flow channel 3101 along the preset flow direction. At this time, the part of the flow channel of each first unit flow channel 3101 is configured to be divided into a plurality of second unit flow channels 3201 based on the first flow dividing element 3202.

[0050] Referring to Figures 1 to 4 As shown, the third-level flow channel 3300 includes a plurality of third unit flow channels 3301 configured as cavity flow channels penetrating through the first frame surface 1001 and the second frame surface 1002 of the pole frame body 1000. The second-level flow channel 3200 and the third-level flow channel 3300 are in communication. At this time, in the multi-level flow channel, the third-level flow channel 3300 realizes the span from the first frame surface 1001 of the pole frame body 1000 to the second frame surface 1002 of the pole frame body 1000, realizes the utilization of both surfaces of the pole frame body 1000, and improves the utilization efficiency of materials.

[0051] Then, the fourth level flow channel 3400 is located on the second frame surface 1002 of the pole frame body 1000, the fourth level flow channel 3400 comprises a plurality of fourth unit flow channels 3401, the fourth unit flow channel 3401 is configured as a groove flow channel opened on the second frame surface 1002, the third level flow channel 3300 and the fourth level flow channel 3400 are communicated, wherein the number of the fourth unit flow channel 3401 of the fourth level flow channel 3400 is less than the number of the third unit flow channel 3301 of the third level flow channel 3300, and each fourth unit flow channel 3401 simultaneously communicates at least two third unit flow channels 3301.

[0052] In one of the embodiments, the fifth level flow channel 3500 is located on the second frame surface 1002 of the pole frame body 1000, the fifth level flow channel 3500 comprises a plurality of fifth unit flow channels 3501, the fifth unit flow channel 3501 is configured as a groove flow channel opened on the second frame surface 1002, the fourth level flow channel 3400 and the fifth level flow channel 3500 are communicated, wherein the number of the fourth unit flow channel 3401 of the fourth level flow channel 3400 is less than the number of the fifth unit flow channel 3501 of the fifth level flow channel 3500, and each fourth unit flow channel 3401 simultaneously communicates at least two fifth unit flow channels 3501.

[0053] When the second level flow channel 3200 is constructed, in one of the embodiments, a plurality of second flow splitting elements 3502 can be arranged in part of the flow channel area of the fourth unit flow channel 3401, and the fifth unit flow channel 3501 is constructed by part of the flow channel area of the fourth unit flow channel 3401, as shown in Figure 2 Or Figure 4 As shown, when a plurality of second flow splitting elements 3502 are arranged at intervals in part of the flow channel area of the fourth unit flow channel 3401, a gap can be formed between adjacent second flow splitting elements 3502, so that the gap between adjacent second flow splitting elements 3502 can be configured to constitute the fifth unit flow channel 3501.

[0054] The skilled in the art can also design the size of the level flow channels of different levels based on the structure of the level flow channels of the above-mentioned several levels on other structural members, which is not limited here.

[0055] The technical features of the above-mentioned embodiments can be combined arbitrarily, and in order to make the description simple, not all possible combinations of the technical features in the above-mentioned embodiments are described, however, as long as the combination of the technical features does not exist contradictory, it should be considered as the scope of the present application.

[0056] The above embodiments only express several implementation ways of the present application, and the description is relatively specific and detailed, but it should not be understood as a limitation to the patent scope of the application. It should be pointed out that for ordinary skilled persons in the art, several modifications and improvements can be made without departing from the concept of the present application, which all belong to the protection scope of the present application. Therefore, the protection scope of the patent of the present application should be subject to the appended claims.

Claims

1. A battery pole frame, characterized by, The battery pole frame comprises: a pole frame body configured as a ring structure with an inner ring through hole, and the pole frame body has first and second frame surfaces facing opposite directions; the pole frame body is provided with a distribution flow channel, and the distribution flow channel is located in at least one of the first and second frame surfaces; wherein the distribution flow channel comprises at least two levels of hierarchical flow channels sequentially connected in a preset flow direction, and along the preset flow direction, the flow channel size of several hierarchical flow channels gradually decreases, and the distribution accuracy of several hierarchical flow channels gradually increases.

2. The battery pole frame of claim 1, wherein, Each of the hierarchical flow channels comprises several parallelly arranged unit flow channels; and / or, several hierarchical flow channels of the distribution flow channel are arranged on the first and second frame surfaces, respectively; and / or, several hierarchical flow channels are configured as at least one of a groove channel and a cavity channel opened in the pole frame body.

3. The battery pole frame of claim 2, wherein, The distribution flow channel comprises five levels of hierarchical flow channels sequentially connected in a preset flow direction, and the five levels of hierarchical flow channels are first, second, third, fourth and fifth hierarchical flow channels sequentially connected in a preset flow direction.

4. The battery pole frame of claim 3, wherein, The first hierarchical flow channel is located on the first frame surface of the pole frame body, and the first hierarchical flow channel comprises several first unit flow channels configured as groove flow channels opened in the first frame surface.

5. The battery pole frame of claim 4, wherein, The second hierarchical flow channel is located on the first frame surface of the pole frame body, and the second hierarchical flow channel comprises several second unit flow channels configured as groove flow channels opened in the second frame surface, and the first and second hierarchical flow channels are in communication; the flow channel width of each second unit flow channel is smaller than the flow channel width of any first unit flow channel, and the number of first unit flow channels of the first hierarchical flow channel is less than the number of second unit flow channels of the second hierarchical flow channel, and each first unit flow channel is in communication with at least two second unit flow channels.

6. The battery pole frame of claim 5, wherein, A first flow dividing element is arranged in part of the flow channel section of several first unit flow channels, and each part of the flow channel section of the first unit flow channel is configured to be divided into several second unit flow channels based on the first flow dividing element; and / or, the third hierarchical flow channel comprises several third unit flow channels configured as cavity flow channels penetrating the first and second frame surfaces of the pole frame body, and the second and third hierarchical flow channels are in communication.

7. The battery pole frame of claim 6, wherein, The fourth hierarchical flow channel is located on the second frame surface of the pole frame body, and the fourth hierarchical flow channel comprises several fourth unit flow channels configured as groove flow channels opened in the second frame surface, and the third and fourth hierarchical flow channels are in communication; the number of fourth unit flow channels of the fourth hierarchical flow channel is less than the number of third unit flow channels of the third hierarchical flow channel, and each fourth unit flow channel is in communication with at least two third unit flow channels.

8. The battery pole frame of claim 7, wherein, The fifth level flow channel is located on a second frame surface of the pole frame body, and comprises a plurality of fifth unit flow channels configured as groove flow channels opened on the second frame surface, and the fourth level flow channel and the fifth level flow channel are in communication; The number of fourth unit flow channels of the fourth level flow channel is less than the number of fifth unit flow channels of the fifth level flow channel, and each fourth unit flow channel simultaneously communicates at least two fifth unit flow channels.

9. The battery pole frame of claim 8, wherein, A plurality of second flow distribution elements are arranged in part of the flow channel area of the fourth unit flow channel, and the gap between adjacent second flow distribution elements is configured to form the fifth unit flow channel.

10. A battery, characterized by The battery comprises the battery pole frame as claimed in any one of claims 1-9.

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