An electric core of a lithium slurry battery

Abstract

This invention provides a lithium slurry battery cell with a three-dimensional staggered channel guide plate between every two adjacent cell units. The overlapping of guide holes on multiple guide plates forms a three-dimensional interconnected channel, enabling fluid transport from the periphery to the center of the three-dimensional staggered channel guide plate. This allows for rapid and timely delivery of fluid to the cell unit adjacent to the guide plate, solving the problems of slow or incomplete wetting within the cell. The three-dimensional staggered channel guide plate has sufficient strength to effectively resist pressure from the cell unit and is not easily deformed, thus ensuring that the flow channels do not become blocked due to pressure. Furthermore, the cell according to this invention allows fluid to be introduced in multiple directions around the three-dimensional staggered channel guide plate, achieving rapid and large-volume flow. The lithium slurry according to this invention enables rapid and complete wetting of the cell in a simple and reliable manner.

Description

Technical Field

[0001] This invention relates to the field of lithium batteries, and more specifically to a lithium slurry battery cell. Background Technology

[0002] Lithium slurry batteries are a new type of lithium battery. They feature a three-dimensional porous cell structure, and the electrode material layers contain a certain proportion of non-bonded, fixed conductive particles. These particles form a dynamic conductive network within the electrolyte, avoiding the capacity reduction and cycle life degradation problems caused by electrode material detachment or loosening in traditional lithium batteries. Capacity-oriented energy storage requires large-capacity individual battery cells, and lithium slurry batteries can also improve system energy density and reduce the complexity of monitoring, control, and safety maintenance systems by increasing the size and capacity of individual cells. However, the larger size and capacity also present new design challenges for lithium slurry batteries.

[0003] High-capacity lithium slurry batteries feature electrolyte injection and drainage capabilities. Their electrode thickness is 5 to 10 times that of traditional lithium-ion batteries, and their electrode area is several times larger. The liquid wetting path for the electrolyte is relatively long. Therefore, providing more channels for electrolyte entry during injection and drainage significantly improves efficiency and facilitates internal liquid wetting. Furthermore, the thick electrode structure allows for more heat dissipation and venting channels within the cell, preventing air bubbles and other debris from remaining on the electrode surface and affecting normal charge and discharge reactions. When designing channels within the cell, given the requirements for mass and volumetric energy density, it's crucial to consider implementing channel design within a limited volume / thickness, ensuring that the channels do not fail due to pressure from adjacent cell units. Summary of the Invention

[0004] To address the aforementioned problems, this invention provides a lithium slurry battery cell comprising multiple cell units. A three-dimensional staggered channel guide plate is disposed between every two adjacent cell units. Through the overlapping of guide holes on the multiple guide plates, a three-dimensional interconnected channel is formed, enabling fluid transport from the periphery of the three-dimensional staggered channel guide plate to its center. This allows for timely and rapid delivery of fluid to the cell unit adjacent to the three-dimensional staggered channel guide plate, thus solving the problems of slow internal wetting speed or even incomplete wetting within the cell. The three-dimensional staggered channel guide plate has sufficient strength to effectively resist pressure from the cell units and is not easily deformed, thereby effectively ensuring that the flow channel does not become blocked due to pressure compression. Furthermore, the battery cell according to this invention can introduce fluid in multiple directions around the three-dimensional staggered channel guide plate, thus achieving rapid and large-volume flow. The lithium slurry battery cell according to this invention is particularly suitable for large batteries, enabling rapid and reliable wetting of the cell in a simple and reliable manner.

[0005] The technical solution provided by this invention is as follows:

[0006] According to the present invention, a lithium slurry battery cell is provided, the cell comprising at least two cell units and a three-dimensional staggered channel guide plate located between two adjacent cell units. The cell unit includes a positive electrode sheet, a separator layer, and a negative electrode sheet stacked sequentially in a cross-layer configuration. The three-dimensional staggered channel guide plate includes a first guide plate having first flow-guiding holes and a second guide plate having second flow-guiding holes. The first flow-guiding holes are distributed on the first guide plate, and the second flow-guiding holes are distributed on the second guide plate. The first flow-guiding holes include a plurality of first peripheral inlet holes located around the periphery of the first guide plate and opening towards the outside of the first guide plate, and a plurality of first internal flow-guiding holes located inside the first guide plate. The second flow-guiding holes include at least a plurality of second internal flow-guiding holes located inside the second guide plate. The first and second flow-guiding holes intersect and overlap to form a three-dimensional staggered connecting channel extending between two adjacent cell units, allowing fluid to enter between two adjacent cell units from the periphery of the cell unit in multiple directions. The overall thickness of the three-dimensional staggered channel guide plate can range from 0.1mm to 5mm, and the material can be a electrolyte-resistant material with a certain strength, such as polyethylene, polypropylene, polyethylene terephthalate, aluminum, titanium, or titanium alloy. When at least one of the guide plates in the three-dimensional staggered channel guide plate is made of an elastic material, the elastic modulus of the elastic material can be between 0.1GPa and 10GPa, and the Poisson's ratio can be between 0.3 and 0.45. This three-dimensional staggered channel guide plate can buffer the external force on the battery cell, improving the battery cell's impact and vibration resistance. When at least one of the guide plates in the three-dimensional staggered channel guide plate is made of a porous material, the three-dimensional staggered channel guide plate can act as a electrolyte reservoir, replenishing the battery cell when it is low in electrolyte. The three-dimensional staggered channel guide plate is located between two battery cell units. Due to its plate-like structure, it has a certain compressive strength, thus effectively ensuring that the flow channels formed on the three-dimensional staggered channel guide plate will not narrow or become blocked due to compression. The overlapping area of ​​the first and second flow guide holes accounts for 15% to 80% of the area of ​​the first flow guide hole, preferably 50% to 80%. By controlling the overlapping area of ​​the first and second flow guide holes, the problem of slow fluid flow caused by a small overlapping area can be avoided. Furthermore, the first flow guide hole accounts for 20% to 90% of the area of ​​the first flow guide plate, preferably 50% to 90%, and the second flow guide hole accounts for 20% to 90% of the area of ​​the second flow guide plate, preferably 50% to 90%. By controlling the proportion of the flow guide hole area to the flow guide plate area, sufficient fluid can be injected between the two battery cells. In addition, multiple first peripheral inlet holes can be distributed on at least three edges of the first flow guide plate. That is, fluid can be injected rapidly and in large quantities from multiple locations and in multiple directions. The fluid flows from the peripheral inlet holes on at least three edges towards the center of the flow guide plate in multiple directions, greatly improving the injection volume and injection speed.

[0007] The battery cell comprises multiple cell units, with a three-dimensional staggered channel guide plate positioned between each pair of cell units. The three-dimensional staggered channel guide plate consists of at least two guide plates. When the three-dimensional staggered channel guide plate is composed of a first guide plate and a second guide plate, the first guide hole on the first guide plate and the second guide hole on the second guide plate overlap. Fluid introduced from the first peripheral inlet hole on the first guide plate enters the second guide hole along the overlapping portion of the first peripheral inlet hole and the second internal guide hole, then enters the first internal guide hole along the overlapping portion of the second guide hole and another first internal guide hole, and continues to flow along the overlapping portion of the first internal guide hole and another second guide hole. In other words, the first guide hole of the first guide plate, the second guide hole of the second guide plate, another first guide hole of the first guide plate, another second guide hole of the second guide plate, and so on, form a connected three-dimensional staggered channel. When a three-dimensional staggered channel guide plate is composed of three or more guide plates, the multiple guide plates can be guide plates with different distributions of guide holes, or they can be guide plates with the same distribution of guide holes but different placement directions, as long as the guide holes of adjacent guide plates partially overlap to form a continuous flow channel. Preferably, when the three-dimensional staggered channel guide plate is composed of three guide plates, at least two guide plates can be the same guide plate. When the three-dimensional staggered channel guide plate is composed of three or more guide plates, at least two pairs of guide plates can be the same guide plate, which simplifies the design and manufacturing process of the guide plate. For example, the three-dimensional staggered channel guide plate includes multiple first guide plates and / or multiple second guide plates, with the first guide plates and second guide plates overlapping each other. In the case of a three-dimensional staggered channel guide plate comprising three guide plates, a second guide plate can be placed in the middle, and first guide plates can be placed on both sides. Fluid flowing in from the first guide holes of the first guide plates on both sides enters the second guide hole of the second guide plate, and then enters the first guide hole of the first guide plate on both sides from the second guide hole of the second guide plate. In the case of a three-dimensional staggered channel guide plate comprising four guide plates, the guide plates spaced apart from each other can be identical guide plates, and the fluid can flow continuously along the overlapping part of the guide holes of adjacent guide plates.

[0008] In addition to the first peripheral inlet holes that can be provided around the periphery of the first guide plate, the second guide plate may also include multiple second peripheral inlet holes located around the periphery of the second guide plate and opening towards the outside of the second guide plate. The multiple first and second peripheral inlet holes can be distributed on at least three edges of the three-dimensional staggered channel guide plate. In this way, fluid can simultaneously enter through the first peripheral inlet holes of the first guide plate and the second peripheral inlet holes of the second guide plate, increasing the flow rate and accelerating the speed of the introduced fluid. Furthermore, the first and / or second guide plates may only have elongated peripheral inlet holes; that is, the first and / or second guide plates may be comb-shaped structures. For example, both the first and second guide plates may only have peripheral inlet holes, and the first peripheral inlet holes of the first guide plate and the second peripheral inlet holes of the second guide plate partially overlap to form a connecting channel.

[0009] By utilizing the overlapping arrangement of guide holes on the first guide plate and the second guide plate, linear or planar connecting channels can be formed. Specifically, one end of the first peripheral inlet hole intersects and overlaps with one second internal guide hole, and both ends of the first internal guide hole intersect and overlap with two second internal guide holes, similar to a chain-like connection, thus forming a linear connecting channel. The linear connecting channel can connect opposite sides of the guide plate. Preferably, multiple linear connecting channels can extend from at least three edges of the guide plate towards its center. The shapes of the first peripheral inlet hole, the first internal guide hole, and the second internal guide hole can be elliptical, rectangular, or curved, etc. Furthermore, at least one part of the first peripheral inlet hole intersects and overlaps with at least one second internal guide hole, and at least three parts of the first internal guide hole intersect and overlap with at least three second guide holes, similar to a mesh-like connection, thus forming a planar connecting channel. The planar connecting channel is interconnected, enabling faster fluid transport. Some of the first guide holes (excluding those at the edge of the guide plate) can form radial channels by intersecting and overlapping with multiple second guide holes at at least three locations. Similarly, some of the second guide holes (excluding those at the edge of the guide plate) can form radial channels by intersecting and overlapping with multiple first guide holes at at least three locations. The shapes of the first peripheral inlet hole, the first internal guide hole, and the second internal guide hole can be circular, elliptical, or polygonal, etc.

[0010] In this invention, the battery cell is divided into multiple cell units, and a three-dimensional staggered channel guide plate is arranged between two adjacent cell units. This effectively avoids problems such as slow or incomplete wetting of the internal structure of large-capacity batteries with large electrode areas or thick cell thicknesses, which can lead to performance degradation. Preferably, the battery cell includes three cell units, with a three-dimensional staggered channel guide plate arranged between every two adjacent cell units. Each cell unit contains multiple cross-layered positive electrode sheets, separator layers, and negative electrode sheets. In conventional battery cells, both the positive and negative electrode sheets are single-layer structures. In this invention, the positive or negative electrode sheets can be configured as double-layer structures. Specifically, the positive electrode may include the same first positive electrode and second positive electrode. The positive electrode inside each cell unit has both adjacent first positive electrode and second positive electrode. The positive electrode on the outermost side of each cell unit has only a single first positive electrode. A three-dimensional staggered channel guide plate is disposed between the outermost first positive electrodes of two adjacent cell units. Alternatively, the negative electrode may include the same first negative electrode and second negative electrode. The negative electrode inside each cell unit has both adjacent first negative electrode and second negative electrode. The negative electrode on the outermost side of each cell unit has only a single first negative electrode. A three-dimensional staggered channel guide plate is disposed between the outermost first negative electrodes of two adjacent cell units. Because the outermost positive / negative electrode of each cell unit no longer corresponds to the corresponding negative / positive electrode, but is adjacent to the three-dimensional staggered channel guide plate, only a single or single-layer first positive electrode or second negative electrode is set on the outermost side of each cell unit. This eliminates the need to separately prepare edge electrode sheets, and each cell unit has good consistency. Moreover, the electrodes on both sides of the three-dimensional staggered channel guide plate are of the same polarity, which greatly reduces the risk of short circuits even if the three-dimensional staggered channel guide plate is made of high-strength metal or alloy materials.

[0011] In this invention, the three-dimensional staggered channel guide plate can be arranged as a composite plate between two adjacent battery cell units. That is, multiple guide plates can be pre-fixed and connected to form an integral three-dimensional staggered channel guide plate, which is then integrally set between two battery cell units. Furthermore, this invention also proposes a flow guide fixing component that combines the three-dimensional staggered channel guide plate with an encapsulation structure, achieving both flow guidance and the fixing of individual battery cell units as well as the mutual fixing of multiple battery cell units.

[0012] Specifically, the flow guide and fixing component can be a box-shaped or strip-shaped component with four sides. Two opposite sides are flow guide plates corresponding to the two planar surfaces of the battery cell unit, and the other two opposite sides are connecting portions corresponding to the two stacked sides of the battery cell unit. One or both side connecting portions can be opened or closed. In the open state, the battery cell unit can be placed in the flow guide and fixing component, that is, the battery cell unit is encased by the flow guide and fixing component. The opening and closing of the side connecting portions can be achieved by adhesive bonding, snap-fitting, or fastening. The flow guide plates on opposite sides of the flow guide and fixing component can be flow guide plates with the same arrangement of flow guide holes or flow guide plates with different arrangement of flow guide holes. Through holes can also be provided on the side connecting portions. Preferably, the entire flow guide and fixing component can be arranged with a uniform pattern of flow guide holes, which simplifies the manufacturing process of the flow guide and fixing component. Two adjacent battery cells can each be covered by their respective flow-guiding and fixing components. The design and arrangement between the lower flow-guiding plate of the upper battery cell and the upper flow-guiding plate of the lower battery cell satisfy the requirements of the first and second flow-guiding plates of the three-dimensional staggered channel flow-guiding plate. That is, the flow-guiding holes of the lower flow-guiding plate of the upper battery cell and the upper flow-guiding plate of the lower battery cell overlap to form a three-dimensional staggered connecting channel extending between two adjacent battery cells, allowing fluid to enter between the two adjacent battery cells from the periphery in multiple directions. Furthermore, one or more independent flow-guiding plates can be set between the lower flow-guiding plate of the upper battery cell and the upper flow-guiding plate of the lower battery cell, as long as the flow-guiding holes between adjacent flow-guiding plates partially overlap to form a continuous flow channel. With the flow-guiding fixing components installed, each layer of flow-guiding plates in the three-dimensional staggered channel flow-guiding plate can be considered as existing independently and can be adjacent to each other to form an integral three-dimensional staggered channel flow-guiding plate. The current guiding and fixing components of the upper and lower battery cell units can be fixedly connected by means of adhesive, snap-fit, or fastening, thereby forming a flow channel between adjacent battery cell units while simultaneously fixing the adjacent battery cell units to each other.

[0013] In one embodiment, the flow guide fixing member may include an upper flow guide plate, a lower flow guide plate, and a first side connecting portion and a second side connecting portion for connecting the upper and lower flow guide plates on opposite sides. The upper flow guide plate may be either a first flow guide plate or a second flow guide plate, and the lower flow guide plate may also be either a first flow guide plate or a second flow guide plate. Each flow guide fixing member covers a battery cell unit, with the upper and lower flow guide plates located on the upper and lower sides of the battery cell unit, respectively, and the first side connecting portion and the second side connecting portion located on opposite sides of the battery cell unit. In two adjacent battery cell units that cover the flow guide fixing members, the lower flow guide plate of one flow guide fixing member and the upper flow guide plate of the other flow guide fixing member are respectively one of the first flow guide plate and the second flow guide plate.

[0014] In another embodiment, the flow guide fixing member includes an upper flow guide plate, a lower flow guide plate, and a first side connecting portion and a second side connecting portion for connecting the upper and lower flow guide plates on opposite sides. The upper flow guide plate can be either a first flow guide plate or a second flow guide plate, and the lower flow guide plate can also be either a first flow guide plate or a second flow guide plate. Each flow guide fixing member covers a battery cell unit, with the upper and lower flow guide plates located on the upper and lower sides of the battery cell unit, respectively, and the first side connecting portion and the second side connecting portion located on opposite sides of the battery cell unit. In two adjacent battery cell units that cover the flow guide fixing members, the lower flow guide plate of one flow guide fixing member and the upper flow guide plate of the other flow guide fixing member are both first flow guide plates, and a separate second flow guide plate is provided between the two first flow guide plates; or, the lower flow guide plate of one flow guide fixing member and the upper flow guide plate of the other flow guide fixing member are both second flow guide plates, and a separate first flow guide plate is provided between the two second flow guide plates. The guide plate, positioned between two flow guide fixtures, can be made of elastic materials, porous materials, etc., thereby achieving multiple functions such as impact resistance and liquid storage.

[0015] It should be noted that the directional terms such as up, down, left, and right in this invention are only used to make the description clearer and do not serve any limiting function.

[0016] The advantages of this invention are:

[0017] (1) By overlapping the flow holes on multiple flow guide plates, a three-dimensional connecting channel is formed, realizing the fluid transport from the periphery of the three-dimensional staggered channel flow guide plate to its center, and then delivering the fluid to the cell unit adjacent to the three-dimensional staggered channel flow guide plate in a timely and fast manner. This can solve the problem of slow internal wetting speed or even insufficient wetting of the cell, and is especially suitable for large batteries, realizing the rapid and sufficient wetting of the cell in a simple and reliable way.

[0018] (2) The three-dimensional staggered channel guide plate has a certain strength and elasticity, which can effectively resist the pressure from the cell unit and is not easily deformed. Moreover, it can continuously apply uniform pressure to the cell units on both sides, so that the surface is always flat and the positive and negative electrodes are in close contact. When the guide plate is made of porous material, the electrolyte can be enriched inside the material and in the three-dimensional channel, which can play a role in replenishing the electrolyte when the cell is short of electrolyte. Attached Figure Description

[0019] Figure 1 A schematic cross-sectional view of a lithium slurry battery cell according to the present invention;

[0020] Figures 2(a) and 2(b) are schematic diagrams of the three-dimensional staggered channel guide plate according to the present invention, wherein Figure 2(a) is an overall schematic diagram and Figure 2(b) is an exploded schematic diagram;

[0021] Figures 3(a), 3(b) and 3(c) are schematic diagrams of a three-dimensional staggered channel guide plate according to the first embodiment of the present invention, wherein Figure 3(a) is an overall schematic diagram, Figure 3(b) is an exploded schematic diagram and Figure 3(c) is a fluid flow schematic diagram;

[0022] Figures 4(a), 4(b) and 4(c) are schematic diagrams of a three-dimensional staggered channel guide plate according to the second embodiment of the present invention, wherein Figure 4(a) is an overall schematic diagram, Figure 4(b) is an exploded schematic diagram and Figure 4(c) is a fluid flow schematic diagram;

[0023] Figures 5(a) and 5(b) are schematic diagrams of a three-dimensional staggered channel guide plate according to the third embodiment of the present invention, wherein Figure 5(a) is an overall schematic diagram and Figure 5(b) is an exploded schematic diagram;

[0024] Figures 6(a) and 6(b) are schematic diagrams of a three-dimensional staggered channel guide plate according to the fourth embodiment of the present invention, wherein Figure 6(a) is an overall schematic diagram and Figure 6(b) is an exploded schematic diagram;

[0025] Figures 7(a) and 7(b) are schematic diagrams of a three-dimensional staggered channel guide plate according to the fifth embodiment of the present invention, wherein Figure 7(a) is an overall schematic diagram and Figure 7(b) is an exploded schematic diagram;

[0026] Figures 8(a) and 8(b) are a perspective view and a cross-sectional view of a lithium slurry battery cell according to another embodiment of the present invention.

[0027] List of reference numerals

[0028] 1a, 1b, 1c — Battery cell unit

[0029] 101 - Positive Electrode Tablet

[0030] 101a - The First Positive Electrode

[0031] 101b – Second positive electrode plate

[0032] 102 - Isolation Layer

[0033] 103 - Negative electrode plate

[0034] 2 - Three-dimensional staggered channel guide plate

[0035] 201 - First Deflector

[0036] 202 - Second deflector

[0037] 203, 204, 205, 206 – Deflectors

[0038] 301 - First guide hole

[0039] 301a – First internal flow guide hole

[0040] 301b - First peripheral inlet hole

[0041] 302 - Second guide hole

[0042] 302a – Second internal guide hole

[0043] 302b - Second peripheral inlet hole

[0044] 303a, 304a, 305a, 306a – Internal flow guide holes

[0045] 304b, 305b – Peripheral access holes

[0046] 4 - Airflow guiding fastener

[0047] 401 - Upper deflector

[0048] 402 - Lower deflector

[0049] 403 - First side connection part

[0050] 404 - Second side connection part Detailed Implementation

[0051] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0052] Figure 1This is a cross-sectional schematic diagram of a lithium slurry battery cell according to the present invention. The cell comprises three cell units 1a, 1b, and 1c. Each cell unit includes a positive electrode 101, an insulating layer 102, and a negative electrode 103. The outermost positive electrode 101 of the cell unit includes a first positive electrode 101a, and the innermost positive electrode 101 includes adjacent identical first positive electrode 101a and second positive electrode 101b. Both the first positive electrode 101a and the second positive electrode 101b include a positive electrode material layer and a positive electrode current collector. The negative electrode 103 includes a negative electrode material layer and a negative electrode current collector. The insulating layer 102 is located between the positive electrode 101 and the negative electrode 103. A three-dimensional staggered channel guide plate 2 is provided between the lowermost first positive electrode 101a of the upper cell unit 1a and the uppermost first positive electrode 101a of the lower cell unit 1b. By constructing a double-layered first positive electrode 101a and a second positive electrode 101b inside each of the two battery cells, and a single-layered first positive electrode 101a on the outermost side, all electrode materials can be fully utilized without the need for separately fabricating edge electrode sheets, ensuring consistency across all battery cells. Fluid can enter between adjacent battery cells via the three-dimensional staggered channel guide plate 2, and then enter adjacent battery cells through the connecting channels within the three-dimensional staggered channel guide plate 2, thereby wetting the battery cells on both sides of the three-dimensional staggered channel guide plate 2.

[0053] Figures 2(a) and 2(b) are schematic diagrams of the three-dimensional staggered channel guide plate according to the present invention, wherein Figure 2(a) is an overall schematic diagram and Figure 2(b) is an exploded schematic diagram. As shown in Figure 2(b), the three-dimensional staggered channel guide plate may include a first guide plate 201 and a second guide plate 202. The first guide plate 201 is provided with a first guide hole 301 penetrating through the first guide plate. A plurality of rectangular first guide holes 301 are distributed approximately evenly on the first guide plate 201. The first guide hole 301 is further divided into a first peripheral inlet hole 301b located around the periphery of the first guide plate and opening towards the outside of the first guide plate, and a complete first internal guide hole 301a located inside the first guide plate. The opening portion of the first peripheral inlet hole 301b can introduce fluid from outside the three-dimensional staggered channel guide plate into the three-dimensional staggered channel guide plate. The second guide plate 202 is provided with a second guide hole 302 penetrating the second guide plate. A plurality of rectangular second guide holes 302 are distributed approximately evenly on the second guide plate 202. In this embodiment, the second guide hole 302 only includes the second internal guide hole 302a. When the first guide plate 201 and the second guide plate 202 are stacked, each first guide hole 301 has a portion that intersects and overlaps with the second guide hole 302, so that the fluid in the first guide hole 301 can flow into the second guide hole 302 that intersects and overlaps with it. Moreover, each second guide hole 302 also has a portion that intersects and overlaps with the first guide hole 301, so that the fluid in the second guide hole 302 can flow into the first guide hole 301 that intersects and overlaps with it. As shown in Figure 2(a), one end of the first peripheral inlet hole 301b of the first guide plate 201 overlaps with one end of the second internal guide hole 302a of the second guide plate 202. The other end of the second internal guide hole 302a overlaps with one end of a first internal guide hole 301a of the first guide plate 201. The other end of the first internal guide hole 301a overlaps with one end of another second internal guide hole 302a of the second guide plate 202, and so on, thereby forming a three-dimensional interlaced connecting channel between the first guide plate 201 and the second guide plate 202.

[0054] When fluid is injected, it is first introduced through the first peripheral inlet hole 301b of the first guide plate 201, then enters the second internal guide hole 302a through the overlapping portion of the first peripheral inlet hole 301b and the second internal guide hole 302a, and then enters the first internal guide hole 301a through the overlapping portion of the second internal guide hole 302a and the first internal guide hole 301a, thereby flowing within the connecting channel formed between the first guide plate 201 and the second guide plate 202. The fluid flowing in the first guide hole 301 of the first guide plate 201 can wet the battery cell adjacent to the first guide plate 201, and the fluid flowing in the second guide hole 302 of the second guide plate 202 can wet the battery cell adjacent to the second guide plate 202. The three-dimensional staggered guide plate has a certain resistance to compression, and even when subjected to external forces from multiple battery cells, it can ensure that the guide holes do not deform, so that the connecting channel can still maintain fluid flow even when subjected to external forces. Furthermore, in lithium slurry batteries, the electrode sheets contain non-bonded material particles, making the unsupported portions prone to deformation. The three-dimensional staggered channel guide plate, with its perforated frame structure, provides excellent support for the electrode sheets.

[0055] Figures 3(a), 3(b), and 3(c) are schematic diagrams of a three-dimensional staggered channel guide plate according to a first embodiment of the present invention, wherein Figure 3(a) is an overall schematic diagram, Figure 3(b) is an exploded schematic diagram, and Figure 3(c) is a fluid flow schematic diagram. A first guide plate 201 is provided with a first guide hole 301 penetrating the first guide plate. Multiple elliptical first guide holes 301 are distributed approximately evenly on the first guide plate 201. The elliptical first guide holes 301 are aligned along the length direction X and width direction Y of the first guide plate 201, respectively. The first guide hole 301 is further divided into a first peripheral inlet hole 301b (elliptical opening) located around the periphery of the first guide plate and opening towards the outside of the first guide plate, and a complete first internal guide hole 301a located inside the first guide plate. The first peripheral inlet hole 301b is located on opposite sides of the first guide plate 201. The second guide plate 202 is provided with a second internal guide hole 302a penetrating the second guide plate. Multiple elliptical second guide holes 302 are distributed approximately evenly on the second guide plate 202, and the elliptical second guide holes 302 are aligned along the length direction X and width direction Y of the second guide plate 202, respectively. When the first guide plate 201 and the second guide plate 202 are stacked, one end of the first peripheral inlet hole 301b overlaps with one end of the second internal guide hole 302a, and both ends of the first internal guide hole 301a overlap with the ends of two second internal guide holes 302a, and both ends of the second internal guide holes 302a overlap with the ends of two first internal guide holes 301a. The connecting channel formed by the first guide hole 301 and the second guide hole 302 is a straight connecting channel extending along the width direction Y of the three-dimensional staggered channel guide plate. As shown by the arrows in Figure 3(c), fluid can flow from opposite sides of the three-dimensional staggered channel guide plate, which has a first peripheral inlet hole 301b, towards the center of the three-dimensional staggered channel guide plate. The first guide plate 201 and the second guide plate 202 can be made of elastic material, which can reduce the impact of external forces on the battery cell. In addition, during the assembly process, the guide plates made of elastic material can be kept under pressure, thereby using the elasticity of the guide plates to ensure tight adhesion between the electrode sheets inside the battery cell.

[0056] Figures 4(a), 4(b), and 4(c) are schematic diagrams of a three-dimensional staggered channel guide plate according to a second embodiment of the present invention, wherein Figure 4(a) is an overall schematic diagram, Figure 4(b) is an exploded schematic diagram, and Figure 4(c) is a fluid flow schematic diagram. A first guide plate 201 is provided with a first guide hole 301 penetrating the first guide plate. Multiple square first guide holes 301 are distributed approximately evenly on the first guide plate 201. The square first guide holes 301 are aligned along the length direction X and width direction Y of the first guide plate 201, respectively. The first guide hole 301 is further divided into a first peripheral inlet hole 301b (opening square) located around the periphery of the first guide plate and opening towards the outside of the first guide plate, and a complete first internal guide hole 301a located inside the first guide plate. First peripheral inlet holes 301b are provided on all four sides of the first guide plate 201, thereby allowing fluid to be introduced simultaneously and rapidly from multiple directions. The second guide plate 202 is provided with a second internal guide hole 302a penetrating the second guide plate. Multiple square second internal guide holes 302a are distributed approximately evenly on the second guide plate 202, and are aligned along the length direction X and width direction Y of the second guide plate 202, respectively. When the first guide plate 201 and the second guide plate 202 are stacked, the two right-angled portions of the first peripheral inlet hole 301b overlap with the right-angled portions of two second internal guide holes 302a, and the four right-angled portions of the first internal guide holes 301a overlap with the right angles of four second internal guide holes 302a. Furthermore, the four right-angled portions of the second internal guide holes 302a overlap with the right-angled portions of four first internal guide holes 301a. The connecting channel formed by the first guide hole 301 and the second guide hole 302 is a planar connecting channel that allows flow along the plane of the three-dimensional staggered channel guide plate. As shown by the arrows in Figure 4(c), fluid can flow from the four sides of the three-dimensional staggered channel guide plate, which has the first peripheral inlet hole 301b, towards the center of the three-dimensional staggered channel guide plate. The porous frame structure of the first guide plate 201 and the second guide plate 202 can delay fluid loss. Especially when the liquid level in the battery drops, the porous frame structure of the first guide plate 201 and the second guide plate 202 can store some fluid, thereby replenishing the liquid in the battery cell.

[0057] Figures 5(a) and 5(b) are schematic diagrams of a three-dimensional staggered channel guide plate according to a third embodiment of the present invention, wherein Figure 5(a) is an overall schematic diagram and Figure 5(b) is an exploded schematic diagram. In this embodiment, the first guide plate 201 and the second guide plate 202 are completely identical, except that the direction of one of the guide plates is rotated by 90 degrees when they are combined. That is, the position and size of the guide holes of the first guide plate 201 and the second guide plate 202 are completely identical, so it is not necessary to design two different first guide plates 201 and second guide plates 202. The first guide plate 201 includes a rectangular first peripheral inlet hole 301b and a first internal guide hole 301a, the first peripheral inlet hole 301b being located on opposite sides of the first guide plate 201; the second guide plate 202 includes a rectangular second peripheral inlet hole 302b and a second internal guide hole 302a, the second peripheral inlet hole 302b being located on opposite sides of the second guide plate 202. When the second guide plate 202 is rotated 90 degrees, peripheral inlet holes are provided on all four sides of the entire three-dimensional staggered channel guide plate, allowing fluid to simultaneously and quickly enter the space between two adjacent battery cells from all four sides of the three-dimensional staggered channel guide plate. Furthermore, when the second guide plate 202 is rotated 90 degrees, the two ends of the first guide hole 301 extending along its length direction X1 of the first guide plate 201 partially overlap with the two second guide holes 302 extending along its length direction X2 (i.e., along the width direction Y1 of the first guide plate 201) of the second guide plate 202. Similarly, the two ends of the second guide holes 302 extending along its length direction X2 of the second guide plate 202 partially overlap with the two first guide holes 301 extending along its length direction X1 (i.e., along the width direction Y2 of the second guide plate 202), thereby forming a zigzag-shaped connecting channel.

[0058] Figures 6(a) and 6(b) are schematic diagrams of a three-dimensional staggered channel guide plate according to a fourth embodiment of the present invention, wherein Figure 6(a) is an overall schematic diagram and Figure 6(b) is an exploded schematic diagram. In this embodiment, the three-dimensional staggered channel guide plate includes three guide plates 203, 204, and 205. The uppermost guide plate 203 has a plurality of rectangular internal guide holes 303a arranged horizontally and vertically. The middle guide plate 204 has a plurality of square internal guide holes 304a arranged horizontally and vertically, and each of its four edges has an open square peripheral inlet hole 304b. The lowermost guide plate 205 has a plurality of rectangular internal guide holes 305a arranged horizontally and vertically, and two opposite edges have open rectangular peripheral inlet holes 305b. The guide holes between adjacent guide plates have overlapping portions, allowing fluid to flow in the three-dimensional staggered channel formed by the three layers of guide plates. The middle guide plate can be made of a porous material, thereby serving to store electrolyte.

[0059] Figures 7(a) and 7(b) are schematic diagrams of a three-dimensional staggered channel guide plate according to a fifth embodiment of the present invention, wherein Figure 7(a) is an overall schematic diagram and Figure 7(b) is an exploded schematic diagram. In this embodiment, the three-dimensional staggered channel guide plate includes four guide plates 203, 204, 205, and 206. The uppermost guide plate 203 and the lowermost guide plate 206 are respectively provided with a plurality of rectangular internal guide holes 303a and 306a arranged horizontally and vertically. The two middle guide plates 204 and 205 are respectively provided with a plurality of rectangular internal guide holes 304a and 305a arranged horizontally and vertically, and rectangular peripheral inlet holes 304b and 305b with openings on two opposite edges. That is to say, the uppermost guide plate 203 and the lowermost guide plate 206 are the same, except that their arrangement directions differ by 90 degrees. The two middle guide plates 204 and 205 are also the same, except that their arrangement directions differ by 90 degrees. This setup simplifies the design and manufacturing process of multi-layer baffles, and allows for the creation of fluid inlets at all four edges of the three-dimensional staggered channel baffle.

[0060] Figures 8(a) and 8(b) are a perspective view and a cross-sectional view of a lithium slurry battery cell according to another embodiment of the present invention. The cell is provided with a current-guiding fixing member 4, which is an annular box shape, and each current-guiding fixing member 4 covers one cell unit 1a, 1b, 1c. The current-guiding fixing member 4 includes an upper current-guiding plate 401, a lower current-guiding plate 402, and a first side-connecting portion 403 and a second side-connecting portion 404 for connecting the upper current-guiding plate 401 and the lower current-guiding plate 402 on opposite sides. The upper current-guiding plate 401 can be the aforementioned first current-guiding plate 201, adjacent to the upper surface of the cell unit, and the lower current-guiding plate 402 can be the aforementioned second current-guiding plate 202, adjacent to the lower surface of the cell unit. The first side-connecting portion 403 and the second side-connecting portion 404 are located on opposite sides of the cell unit, respectively, for connecting the upper current-guiding plate 401 and the lower current-guiding plate 402. The first side connecting portion 403 can be an L-shaped fin extending from the edges of the upper guide plate 401 and the lower guide plate 402, respectively. Similarly, the second side connecting portion 404 can also be an L-shaped fin extending from the edges of the upper guide plate 401 and the lower guide plate 402, respectively. The upper fin and the lower fin can be fastened together by a fastening mechanism. When two adjacent cell units covered by the flow guide fixing member 4 are adjacent to each other, the flow guide hole of the lower guide plate 402 of one flow guide fixing member partially overlaps with the flow guide hole of the upper guide plate 401 of the other flow guide fixing member, thereby forming a connecting channel between the two adjacent cell units. The flow guide fixing member can not only form a connecting channel for fluid to pass through between two adjacent cell units, but also serve to fix the electrode plates inside the cell unit. When corresponding fixing mechanisms are provided on adjacent battery units, it can also serve to fix the adjacent cell units to each other.

[0061] The specific embodiments described herein are not intended to limit the scope of the invention. Any person skilled in the art can make many possible variations and modifications to the technical solutions of the present invention, or modify them into equivalent embodiments, without departing from the scope of the invention. Therefore, any simple modifications, equivalent changes, and alterations made to the above embodiments based on the technical essence of the present invention, without departing from the scope of the invention, shall still fall within the protection scope of the present invention.

Claims

1. A lithium slurry battery cell, characterized in that, The battery cell includes at least two battery cell units and a three-dimensional staggered channel guide plate located between two adjacent battery cell units. Each battery cell unit includes a positive electrode sheet, an insulating layer, and a negative electrode sheet stacked in a crisscross pattern. The three-dimensional staggered channel guide plate includes a first guide plate with first guide holes and a second guide plate with second guide holes. The first guide hole includes a plurality of first peripheral inlet holes located around the periphery of the first guide plate and opening towards the outside of the first guide plate, and a plurality of first internal guide holes located inside the first guide plate. The second guide hole includes a plurality of second peripheral inlet holes located around the periphery of the second guide plate and opening towards the outside of the second guide plate, and a plurality of second internal guide holes located inside the second guide plate. The plurality of first peripheral inlet holes are distributed in the... At least three edges of the first guide plate, or the plurality of first peripheral inlet holes and second peripheral inlet holes, are distributed on at least three edges of the three-dimensional staggered channel guide plate. One end of the first peripheral inlet hole intersects and overlaps with one of the second internal guide holes, and both ends of the first internal guide hole intersect and overlap with two of the second internal guide holes, thereby forming a linear connecting channel. The first guide hole and the second guide hole intersect and overlap to form a three-dimensional staggered connecting channel extending between two adjacent cell units, so that fluid can enter between two adjacent cell units from the periphery of the cell unit in multiple directions. The area of ​​the overlapping part of the first guide hole and the second guide hole accounts for 15% to 80% of the area of ​​the first guide hole.

2. The battery cell according to claim 1, wherein, The three-dimensional staggered channel guide plate includes multiple first guide plates and / or multiple second guide plates, with the first guide plates and the second guide plates being stacked in a cross manner.

3. The battery cell according to claim 1, wherein, The battery cell includes three battery cell units, and the three-dimensional staggered channel guide plate is arranged between every two adjacent battery cell units.

4. The battery cell according to claim 1, wherein, The first guide hole occupies 20% to 90% of the area of ​​the first guide plate, and the second guide hole occupies 20% to 90% of the area of ​​the second guide plate.

5. The battery cell according to claim 1, wherein, The first peripheral inlet hole, the first internal guide hole, and the second internal guide hole are elliptical, rectangular, or curved.

6. The battery cell according to claim 1, wherein, At least one portion of the first peripheral inlet hole intersects and overlaps with at least one second internal guide hole, and at least three portions of the first internal guide hole intersect and overlap with at least three second guide holes respectively, thereby forming a planar connecting channel.

7. The battery cell according to claim 6, wherein, The first peripheral inlet hole, the first internal guide hole, and the second internal guide hole are circular, elliptical, or polygonal in shape.

8. The battery cell according to claim 1, wherein, The positive electrode includes an identical first positive electrode and a second positive electrode. The positive electrode inside each cell unit has both the first positive electrode and the second positive electrode adjacent to each other. The positive electrode on the outermost side of each cell unit has only a single first positive electrode. The three-dimensional staggered channel guide plate is disposed between the outermost first positive electrodes of two adjacent cell units. Alternatively, the negative electrode includes an identical first negative electrode and a second negative electrode. The negative electrode inside each cell unit has both the first negative electrode and the second negative electrode adjacent to each other. The negative electrode on the outermost side of each cell unit has only a single first negative electrode. The three-dimensional staggered channel guide plate is disposed between the outermost first negative electrodes of two adjacent cell units.

9. The battery cell according to claim 1, wherein, The battery cell is provided with a current-guiding fixing component. The current-guiding fixing component includes an upper current-guiding plate, a lower current-guiding plate, and a first side connecting portion and a second side connecting portion for connecting the upper current-guiding plate and the lower current-guiding plate on opposite sides. The upper current-guiding plate is either the first current-guiding plate or the second current-guiding plate, and the lower current-guiding plate is either the first current-guiding plate or the second current-guiding plate. Each current-guiding fixing component covers one battery cell unit. The upper current-guiding plate and the lower current-guiding plate are respectively located on the upper and lower sides of the battery cell unit. The first side connecting portion and the second side connecting portion are respectively located on opposite sides of the battery cell unit. In two adjacent battery cell units that cover the current-guiding fixing components, the lower current-guiding plate of one current-guiding fixing component and the upper current-guiding plate of the other current-guiding fixing component are respectively one of the first current-guiding plate and the second current-guiding plate.

10. The battery cell according to claim 1, wherein, The battery cell is provided with a current-guiding fixing component, which includes an upper current-guiding plate, a lower current-guiding plate, and a first side connecting portion and a second side connecting portion for connecting the upper and lower current-guiding plates on opposite sides. The upper current-guiding plate is either the first current-guiding plate or the second current-guiding plate, and the lower current-guiding plate is either the first current-guiding plate or the second current-guiding plate. Each current-guiding fixing component covers one battery cell unit. The upper current-guiding plate and the lower current-guiding plate are respectively located on the upper and lower sides of the battery cell unit. The first side connecting portion and the lower current-guiding plate are connected on opposite sides of the upper current-guiding plate and the lower current-guiding plate. The second side connection portions are located on opposite sides of the cell unit. In two adjacent cell units that respectively cover the current guiding and fixing member, the lower current guiding plate of one current guiding and fixing member and the upper current guiding plate of the other current guiding and fixing member are both the first current guiding plate and a separate second current guiding plate is provided between the two first current guiding plates, or the lower current guiding plate of one current guiding and fixing member and the upper current guiding plate of the other current guiding and fixing member are both the second current guiding plate and a separate first current guiding plate is provided between the two second current guiding plates.

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