Cover plate patch, cover plate assembly and battery monomer

Abstract

The utility model discloses a cover plate patch, a cover plate assembly and a battery monomer, and relates to the technical field of batteries, the cover plate patch is used for being arranged on a cover plate main body of the battery monomer; the cover plate patch comprises a patch main body and a diversion structure, and the patch main body is provided with a pole through hole; the flow guide structure is arranged on the patch main body; and the flow guide structure guides a fluid medium to flow out along a direction deviating from the pole through hole on the patch main body. By optimizing the arrangement of the flow guide structure, condensed and collected water or other fluid media are guided to flow in the direction deviating from the pole through hole, and the risk that the fluid media such as water enter the pole is reduced.

Description

Technical Field

[0001] This application relates to the field of battery technology, and in particular to a cover plate patch, a cover plate assembly, and a battery cell. Background Technology

[0002] During use, fluids such as water can easily seep into the terminals of a battery cell. This seepage can cause a short circuit and, in severe cases, battery corrosion. Utility Model Content

[0003] The main objective of this application is to provide a cover plate patch, cover plate assembly, and battery cell, which aims to reduce the risk of fluid medium entering the terminal post.

[0004] To achieve the above objectives, this application proposes a cover plate patch for mounting on the cover plate body of a battery cell; the cover plate patch includes:

[0005] The patch body has through holes for electrode posts;

[0006] A flow guiding structure is disposed on the patch body;

[0007] The flow guiding structure guides the fluid medium to flow out along a direction deviating from the electrode through-hole on the patch body.

[0008] In one embodiment, the patch body is provided with an annular protrusion, which surrounds the through hole of the pole post.

[0009] In one embodiment, water-blocking strips are provided on both sides of the patch body, and the water-blocking strips extend along a first direction.

[0010] In one embodiment, there are two pole post through holes, and the two pole post through holes include a first pole post through hole and a second pole post through hole that are spaced apart along a first direction;

[0011] The patch body has a first end and a second end disposed opposite to each other along a first direction, and the flow guiding structure includes a plurality of flow guiding elements, each of which is inclined toward the second end of the patch body.

[0012] In one embodiment, the flow guiding structure has a first flow guiding portion for diverting the fluid medium of the battery cell, and the first flow guiding portion is provided on the side of the electrode through hole near the first end of the patch body.

[0013] In one embodiment, the flow guiding structure has a second flow guiding section for converging the fluid medium of the battery cell, and the second flow guiding section is provided on the side of the electrode through hole near the second end of the patch body.

[0014] In one embodiment, the patch body has a first side and a second side disposed opposite to each other, and the plurality of flow guides includes a first flow guide and a second flow guide;

[0015] The first guide is disposed close to the first side and is inclined toward the first side;

[0016] The second guide is disposed close to the second side and is inclined toward the second side;

[0017] The first flow guide and the second flow guide are alternately arranged to construct the first flow guide section.

[0018] In one embodiment, the patch body has a first side and a second side disposed opposite to each other, and the plurality of flow guides includes a third flow guide and a fourth flow guide;

[0019] The third guide is disposed close to the first side and inclined toward the second side;

[0020] The fourth guide element is disposed close to the second side and inclined toward the first side;

[0021] The third and fourth flow guides are alternately arranged to construct the second flow guide section.

[0022] In one embodiment, the flow guiding structure has a first flow guiding section and a second flow guiding section, the first flow guiding section being used to divert the fluid medium of the battery cell, and the second flow guiding section being used to merge the fluid medium of the battery cell;

[0023] The plurality of flow guides includes a fifth flow guide, which is disposed between the first flow guide and the second flow guide.

[0024] This application also proposes a cover plate assembly, including a cover plate body and a cover plate patch as described above, the cover plate patch being disposed on the cover plate body.

[0025] This application also proposes a single battery cell, comprising:

[0026] case;

[0027] The inner core is disposed within the housing;

[0028] The cover plate body is disposed on the housing;

[0029] The pole post is disposed on the cover plate body; and

[0030] The cover plate patch as described above is disposed on the cover plate body.

[0031] The technical solution of this application provides a flow guiding structure on the patch body. The flow guiding structure is used to guide the condensation and other fluid media formed on the surface of the cover plate patch to flow out in a direction away from the electrode post through hole, so that the fluid medium does not pass through the electrode post when it flows along the flow guiding structure, thereby effectively reducing the risk of moisture entering the electrode post and extending the battery life.

[0032] The flow-guiding structure can also guide the electrolyte in the battery cell to flow out in a direction away from the through hole of the terminal post, so that the electrolyte and other fluid media do not pass through the terminal post when flowing along the flow-guiding structure. This solves the problem of electrolyte flowing into the terminal post, which affects battery performance and may cause internal short circuits in the battery cell. It also reduces the risk of electrolyte and other fluid media entering the terminal post and extends battery life. Attached Figure Description

[0033] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0034] Figure 1 A schematic diagram of the structure of a single battery cell provided in this application;

[0035] Figure 2 A schematic diagram of the structure of an embodiment of the cover plate patch provided in this application;

[0036] Figure 3 A schematic diagram of the structure of another embodiment of the cover plate patch provided in this application;

[0037] Figure 4 A schematic diagram of another embodiment of the cover plate patch provided in this application;

[0038] Figure 5 A schematic diagram of another embodiment of the cover plate patch provided in this application from another direction;

[0039] Figure 6 for Figure 5 A cross-sectional view along the AA direction;

[0040] Figure 7 for Figure 6 A magnified view of point B;

[0041] Figure 8 A schematic diagram of the structure of another embodiment of the cover plate patch provided in this application;

[0042] Figure 9A structural schematic diagram from another perspective of another embodiment of the cover plate patch provided in this application;

[0043] Figure 10 A structural schematic diagram from another perspective of yet another embodiment of the cover plate patch provided in this application;

[0044] Figure 11 for Figure 10 A cross-sectional view in the CC direction;

[0045] Figure 12 for Figure 11 A magnified view of point D.

[0046] Explanation of icon numbers:

[0047] 100. Cover plate patch; 110. Patch body; 1101. First end; 1102. Second end; 1103. First side; 1104. Second side; 111. First pole post through hole; 112. Second pole post through hole; 120. Flow guiding structure; 121. First flow guiding part; 1211. First flow guiding component; 1212. Second flow guiding component; 122. Second flow guiding part; 1221. Third flow guiding component; 1222. Fourth flow guiding component; 123. Fifth flow guiding component; 130. Annular protrusion; 140. Water baffle strip; 150. Recessed position;

[0048] 210. Cover plate body; 220. Pole post;

[0049] 300. Casing;

[0050] 400. Inner core.

[0051] The realization of the purpose, functional features and advantages of this application will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0052] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of the embodiments. Based on the embodiments of this application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this application.

[0053] It should be noted that if the embodiments of this application involve directional indicators (such as up, down, left, right, front, back, etc.), the directional indicators are only used to explain the relative positional relationship and movement of the components in a specific posture. If the specific posture changes, the directional indicators will also change accordingly.

[0054] Furthermore, if the embodiments of this application involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the use of "and / or" or "and / or" throughout the text includes three parallel solutions. For example, "A and / or B" includes solution A, solution B, or a solution that simultaneously satisfies A and B. Furthermore, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed in this application.

[0055] During use, condensation (water droplets) can form on the surface of a battery cell due to changes in ambient temperature. This condensation is caused by the difference between ambient humidity and the surface temperature of the object. When the water vapor content in the air is high and it encounters a cool surface, the water vapor condenses into dew droplets. The condensation on the battery surface can easily seep into the terminals 220. If the water on the battery surface cannot be effectively drained, it can lead to a short circuit and, in severe cases, battery corrosion.

[0056] In order to draw out fluid media such as water generated on the battery surface and extend the battery life, this application proposes a cover plate patch 100, a cover plate assembly and a battery cell.

[0057] Reference Figure 1 The cover plate patch 100 is applied to a battery cell. The battery cell includes, but is not limited to, a cover plate body 210, a housing 300, and an inner core 400. The cover plate patch 100 is disposed on the cover plate body 210 of the battery cell. The inner core 400 is disposed within the housing 300, and the cover plate body 210 is disposed at an opening in the housing 300. Terminal posts 220 are disposed on the cover plate body 210. The housing is a hollow structure with open ends. The cover plate body 210 is disposed at an opening in the housing 300. The housing 300 and the cover plate disposed at the opening of the housing 300 enclose a sealed structure for accommodating the inner core 400.

[0058] Optionally, the cover plate body 210 is also provided with an injection hole. The injection hole is used to inject electrolyte into the battery to ensure that the electrolyte can flow smoothly into the battery and be evenly distributed to all parts of the inner core 400, so as to fully wet the inner core 400 and ensure the charging and discharging performance of the battery. The housing 300 can be open on one side or open on both sides. When the housing 300 is open on one side, a cover plate body 210 can be provided at one end of the opening of the housing 300; when the housing 300 is open on both sides, a cover plate body 210 can be provided at each end of the opening of the housing 300.

[0059] For example, such as Figure 2 , Figure 3 , Figure 4 As shown, the cover plate patch 100 includes a patch body 110 and a flow guiding structure 120. The patch body 110 has an electrode through hole. The flow guiding structure 120 is disposed on the patch body 110. The flow guiding structure 120 guides the fluid medium to flow out in a direction deviating from the electrode through hole on the patch body 110.

[0060] In the embodiments of this application, the battery cell can be, but is not limited to, a blade battery (a type of lithium iron phosphate battery) or any other type of battery, used to improve energy density by optimizing the internal space layout of the battery pack. The patch body 110 has a first side and a second side disposed opposite to each other. In the assembled state, the first side of the patch body 110 is disposed away from the cover plate body 210, and the second side of the patch body 110 is disposed close to and connected to the cover plate body 210. The cover plate patch 100 may optionally be made of a material with good waterproof and heat-resistant properties, and is specifically connected to the side of the cover plate body 210 opposite to the housing 300 by means of hot-melt welding, bonding, etc.

[0061] In embodiments of this application, a flow guiding structure 120 may optionally be provided on a first side of the patch body 110 facing away from the cover plate body 210, for forming a water channel (or water groove) on the surface of the patch body 110 through the flow guiding structure 120. Figure 4 The arrow indicates the direction of water flow. The flow guiding structure 120 is on the patch body 110 and is used to guide the condensation (water flow) generated by the battery and formed on the surface of the cover patch 100 or other fluid medium formed on the first side of the patch body 110 to flow out in a direction away from the terminal hole, so that the fluid medium does not pass through the terminal when flowing along the flow guiding structure. This setting can reduce the risk of water entering the terminal 220 and extend the battery life.

[0062] In addition to guiding the outflow of condensate, the flow-guiding structure 120 of this application can also guide other fluid media such as electrolytes to flow out in a direction deviating from the through-hole of the electrode post. Specifically, the flow-guiding structure 120 can be provided on the second side of the patch body 110 near the cover plate body 210 to guide the electrolyte in the battery cell to flow out in a direction deviating from the through-hole of the electrode post, so that the fluid media such as electrolytes do not pass through the electrode post when flowing along the flow-guiding structure. This setting can solve the problem of electrolytes flowing into the electrode post 220 affecting battery performance and potentially causing internal short circuits in the battery cell, reduce the risk of fluid media such as electrolytes entering the electrode post 220, and extend battery life.

[0063] In this embodiment, by optimizing the structure of the cover plate patch 100, the fluid medium can be guided to flow out in a direction away from the electrode through hole to a region far away from the electrode through hole. The overall structure is simple, easy to manufacture, low in overall cost, and highly manufacturable.

[0064] To prevent condensation from accumulating on the battery surface and seeping into the inside of the terminal 220, which could cause a short circuit between the terminal 220 and the casing 300, and in severe cases, even corrosion of the inner core 400 and casing 300, such as... Figure 4 As shown, in one embodiment, the patch body 110 is provided with an annular protrusion 130, which surrounds the terminal through hole. The annular protrusion 130 can be used to prevent condensed water or other fluid media from directly entering the terminal 220 through the terminal through hole, which could cause a short circuit between the terminal 220 and the housing 300, or even cause corrosion of the housing 300, thereby extending the battery life.

[0065] like Figure 4 As shown, in one embodiment, the patch body 110 is provided with water-blocking strips 140 on both sides, and the water-blocking strips 140 extend along the first direction D1.

[0066] Understandable, such as Figure 4 The patch body 110 shown has a first side 1103 and a second side 1104 arranged opposite to each other along the first direction D1. Both the first side 1103 and the second side 1104 of the patch body 110 are provided with a water-blocking strip 140, and specifically, the water-blocking strip 140 can be provided on at least one of the first side and the second side of the patch body 110.

[0067] The top surface of the battery cell is defined by the side with the cover patch 100. The dimensions of the cover patch 100 and the cover body 210 correspond to the dimensions of the top surface of the battery cell. The length direction of the cover body 210 is defined by the side with the relatively longer length, and the width direction is defined by the side with the relatively shorter length. The length of the cover patch 100 corresponds to the length of the cover body 210, and the width of the cover patch 100 corresponds to the width of the cover body 210. In this application, the first direction D1 intersects with the second direction D2. Specifically, the first direction D1 corresponds to the length direction of the cover patch 100, and the second direction D2 corresponds to the width direction of the cover patch 100.

[0068] When a water-retaining strip 140 is provided on the side of the patch body 110, water, electrolyte, and other fluid media are discharged along the water-retaining strip 140, keeping condensation and other fluid media away from the terminal post 220. When the battery cell is used in a battery pack or other battery system, multiple battery cells are arranged along the second direction D2. The water-retaining strip 140 prevents water, electrolyte, and other fluid media from entering the surrounding battery cells, and even the inner core 400 of the surrounding battery.

[0069] like Figure 5 , Figure 6 , Figure 7 As shown, this application, through the arrangement of the flow guiding structure 120, the water-blocking strip 140, and the annular protrusion 130, can guide the electrolyte, water formed by condensation, and other fluid media to flow out in a direction deviating from the electrode post through hole, preventing the fluid media from entering the electrode post 220. When the flow guiding structure 120, the water-blocking strip 140, and the annular protrusion 130 are only provided on the first side of the cover plate patch 100, the second side of the cover plate patch 100 can optionally be formed corresponding to the positions of the flow guiding structure 120, the water-blocking strip 140, and the annular protrusion 130. Figure 7 The recessed position 150 shown; when the guide structure 120, the water-blocking strip 140, and the annular protrusion 130 are only provided on the second side of the cover plate patch 100, the first side of the cover plate patch 100 may optionally form a recessed position 150 corresponding to the position of the guide structure 120, the water-blocking strip 140, and the annular protrusion 130; such a setting can be used to reduce the material used in the cover plate patch 100. In the embodiments of this application, the aforementioned guide structure 120, water-blocking strip 140, and annular protrusion 130 may optionally be formed by sheet stamping; the specific setting can be determined according to actual conditions and is not limited here.

[0070] like Figure 8 , Figure 9 As shown, in one embodiment, there are two pole pin through holes, including a first pole pin through hole 111 and a second pole pin through hole 112 that are spaced apart along the first direction D1.

[0071] Understandably, each battery cell has two terminals 220, including a positive terminal and a negative terminal spaced apart along the length of the cover body 210. The positive and negative terminals of the cell are connected to the positive and negative terminals to output current. The position of one of the first terminal through-hole 111 and the second terminal through-hole 112 corresponds to the position of the positive terminal on the cover body 210, and the other corresponds to the position of the negative terminal on the cover body 210.

[0072] The patch body 110 has a first end 1101 and a second end 1102 disposed opposite to each other along a first direction D1. One of the first electrode through-hole 111 and the second electrode through-hole 112 is disposed near the first end 1101 of the patch body 110, and the other is disposed near the second end 1102 of the patch body 110. The flow guiding structure 120 includes a plurality of flow guiding elements, each of which is inclined toward the second end 1102 of the patch body 110.

[0073] like Figure 8 , Figure 9 , Figure 10 As shown, for ease of processing, alternatively, multiple flow guides are spaced apart, and at least some of the multiple flow guides are parallel to each other.

[0074] The inclined direction of multiple guide components is consistent, which is intended to guide the fluid medium such as condensate water in different areas, reduce the water flow after collection, and prevent the fluid medium such as water after collection from directly entering the pole 220 through the pole through hole; when the annular protrusion 130 is provided, it can also effectively reduce the risk of the fluid medium such as water after collection directly impacting the annular protrusion 130 and causing the fluid medium such as water to enter the pole.

[0075] For example, such as Figure 9 As shown, each flow guide is inclined towards the second end 1102, meaning the extension direction of the flow guide intersects the first direction D1. This guide directs the fluid medium along a direction deviating from the electrode post through-hole towards the second end 1102 of the patch body 110, preventing the fluid medium from passing through the electrode post. This effectively improves water conduction efficiency and prevents water from flowing into the area where the electrode post 220 is located, further reducing the risk of moisture entering the electrode post 220, optimizing battery safety, and extending battery life. In implementation, the battery cell is placed sideways in the system, with the first direction D1 corresponding to the vertical direction. The flow guide is inclined towards the second end 1102 to utilize gravity to accelerate the flow rate and further prevent the fluid medium from entering the electrode post.

[0076] Optionally, multiple flow guides are disposed around the first terminal through hole 111 and the second terminal through hole 112. Specifically, but not limited to, flow guides can be disposed on the side of the first terminal through hole 111 and the second terminal through hole 112 that are close to each other; flow guides can be disposed on the side of the first terminal through hole 111 and the second terminal through hole 112 that are opposite to each other; flow guides can be disposed on other sides of the first terminal through hole 111 and the second terminal through hole 112; no limitation is made here. Distributing flow guides around the two terminal through holes can adapt to the different orientation requirements of the battery cell. When the battery cell is placed in any orientation, it can guide the fluid medium such as water in the middle of the cover plate patch 100 to the side of the cover plate patch 100, reduce the water flow rate after the fluid medium (such as condensation) in the cover plate patch 100 converges, and prevent the converged fluid medium from directly impacting the terminal 220 and causing water to enter the terminal 220.

[0077] like Figure 10 , Figure 11 , Figure 12 As shown, when the flow guiding structure 120, the water-blocking strip 140, and the annular protrusion 130 are only provided on the first side of the cover plate patch 100, the second side of the cover plate patch 100 can be formed at least corresponding to the positions of the annular protrusion 130 and multiple flow guiding components, etc., of the flow guiding structure 120. Figure 12 The recessed position 150 shown 。

[0078] In embodiments of this application, multiple guide members are provided at least between the first pole post through hole 111 and the second pole post through hole 112. This is to further prevent fluid media (such as moisture generated by condensation) from entering the pole post through hole 111 and the second pole post through hole 112 from entering the pole post through hole and further into the pole post 220.

[0079] In other embodiments of this application, the guide member may also be provided to extend along the second direction D2, with the first direction D1 corresponding to the length direction of the cover plate patch 100 and the second direction D2 corresponding to the width direction of the cover plate patch 100. Optionally, the extension direction of the guide member may be parallel to the width direction of the cover plate patch 100, that is, the guide member is provided on the cover plate patch 100 in a form perpendicular to the length direction of the cover plate patch 100, for guiding the fluid medium such as water to flow out along the width direction of the cover plate patch 100 in a direction deviating from the electrode through hole to the side of the patch body 110, so that the fluid medium does not pass through the electrode when flowing along the guide member; the specific configuration can be determined according to actual conditions and is not limited here.

[0080] Reference Figure 2 , Figure 3In one embodiment, the flow guiding structure 120 has a first flow guiding portion 121 for diverting the fluid medium of the battery cell, and the first flow guiding portion 121 is provided on the side of the electrode through hole near the first end 1101 of the patch body 110.

[0081] The first guide section 121 diverts the fluid medium, guiding condensate, electrolyte, and other fluid media to the side of the patch body 110. This effectively increases the speed of moisture removal, optimizes the flow efficiency, and effectively prevents the fluid medium from entering the electrode post.

[0082] For example, such as Figure 4 As shown, the patch body 110 has a first side 1103 and a second side 1104 disposed opposite to each other, and a plurality of flow guides including a first flow guide 1211 and a second flow guide 1212; the first flow guide 1211 is disposed close to the first side 1103 and inclined toward the first side 1103; the second flow guide 1212 is disposed close to the second side 1104 and inclined toward the second side 1104; the first flow guide 1211 and the second flow guide 1212 are alternately disposed to form a first flow guide portion 121.

[0083] A first guide portion 121 is provided on the side of the first electrode through hole 111 and the second electrode through hole 112 near the first end 1101 of the patch body 110. Each first guide portion 1211 and the second guide portion 1212 is inclined toward the second end 1102 of the patch body 110. The first guide portion 1211 is located near the first side 1103 and is inclined toward the first side 1103; the second guide portion 1212 is located near the second side 1104 and is inclined toward the second side 1104.

[0084] like Figure 4As shown, taking the first guide portion 121 corresponding to the first electrode through hole 111 as an example, at least one first guide element 1211 and at least one second guide element 1212 are respectively provided on the side of the first electrode through hole 111 near the first end 1101 of the patch body 110. The first guide element 1211 and the second guide element 1212 are alternately arranged to construct the first guide portion 121. The first guide element 1211 and the second guide element 1212 can be optionally arranged in a figure-eight shape (the first guide element 1211 and the second guide element 1212 are spaced apart), a herringbone shape (the first guide element 1211 and the second guide element 1212 are connected), or any other method suitable for practical use. By alternately and repeatedly arranging the first guide element 1211 and the second guide element 1212, it is ensured that fluid media such as condensation droplets can be guided in time, and fluid media are prevented from entering the electrode through hole. With this configuration, when the battery cell is placed upright in the system, i.e., in the placement state, and the first terminal through hole 111 and the second terminal through hole 112 are arranged in the vertical direction, the fluid medium such as condensate and electrolyte can be distributed to the water-blocking strips 140 on the first side 1103 and the second side 1104 of the patch body 110, and flow out from the second end 1102 of the patch body 110 along the water-blocking strips 140, effectively improving the flow conduction efficiency.

[0085] The first guide section corresponding to the second pole post through hole 112 can be referenced accordingly, and will not be described again here.

[0086] Reference Figure 2 , Figure 3 In one embodiment, the flow guiding structure 120 has a second flow guiding section 122 for converging the fluid medium of the battery cell, and the second flow guiding section 122 is provided on the side of the electrode through hole near the second end 1102 of the patch body 110.

[0087] The second guide section collects fluid media such as condensate and electrolyte, and directs the collected fluid media to the second end 1102 of the patch body 110. This effectively improves the speed of moisture removal, optimizes the flow efficiency, and further prevents moisture from flowing into the electrode post 220.

[0088] For example, such as Figure 4 As shown, the patch body 110 has a first side 1103 and a second side 1104 disposed opposite to each other, and a plurality of flow guides including a third flow guide 1221 and a fourth flow guide 1222; the third flow guide 1221 is disposed close to the first side 1103 and inclined toward the second side 1104; the fourth flow guide 1222 is disposed close to the second side 1104 and inclined toward the first side 1103; the third flow guide 1221 and the fourth flow guide 1222 are disposed alternately to form a second flow guide portion 122.

[0089] A second flow guide 122 is provided on the side of the first electrode through hole 111 and the second electrode through hole 112 near the second end 1102 of the patch body 110. Each third flow guide 1221 and the fourth flow guide 1222 is inclined toward the second end 1102 of the patch body 110. The third flow guide 1221 is located near the first side 1103 and is inclined toward the second side 1104; the fourth flow guide 1222 is located near the second side 1104 and is inclined toward the first side 1103.

[0090] like Figure 4 As shown, taking the second guide portion 122 corresponding to the first electrode through hole 111 as an example, at least one third guide element 1221 and at least one fourth guide element 1222 are respectively provided on the side of the first electrode through hole 111 near the second end 1102 of the patch body 110. The third guide element 1221 and the fourth guide element 1222 are alternately arranged to construct the second guide portion 122. The third guide element 1221 and the fourth guide element 1222 can optionally be arranged in an inverted V-shape (the third guide element 1221 and the fourth guide element 1222 are spaced apart), a V-shape (the third guide element 1221 and the fourth guide element 1222 are connected), or any other method suitable for practical use. By alternately and repeatedly arranging the third guide element 1221 and the fourth guide element 1222, it is ensured that fluid media such as condensate and electrolyte can be collected in a timely manner to the first side 1103 or the second side 1104 of the patch body 110, and the collected fluid media is prevented from entering the electrode through hole. With this configuration, when the battery cell is placed sideways in the system, i.e., in the placement state, and the first terminal through hole 111 and the second terminal through hole 112 are arranged in the vertical direction, the fluid medium such as condensate and electrolyte can be collected to the water-blocking strip 140 on the first side 1103 or the second side 1104 of the patch body 110, and flow out from the second end 1102 of the patch body 110 along the water-blocking strip 140, effectively improving the flow conduction efficiency.

[0091] The second guide section corresponding to the second pole post through hole 112 can be referenced accordingly, and will not be described in detail here.

[0092] In the embodiments of this application, such as Figure 3 , Figure 4 As shown, a first guide portion 121 and a second guide portion 122 are respectively provided for the first electrode through hole 111 and the second electrode through hole 112. Through the first guide portion 121 and the second guide portion 122, the fluid medium such as condensate and electrolyte is guided in separate areas, which can reduce the water flow after the flow converges and prevent the fluid medium such as water after the flow converges from directly impacting the annular protrusion 130 and causing the fluid medium to directly enter the electrode.

[0093] It should be noted that the first guide element 1211, the second guide element 1212, the third guide element 1221, and the fourth guide element 1222 are spaced apart from and do not communicate with each other, as well as with the water-blocking strip 140 on the first side 1103 and the water-blocking strip 140 on the second side 1104 of the patch body 110, to facilitate the outflow of fluid medium. The vertical projection of the guide structure 120 covers the electrode through hole, and the vertical projections of the first guide element 1211 and the second guide element 1212 overlap, as do the vertical projections of the third guide element 1221 and the fourth guide element 1222, to further prevent fluid medium from entering the electrode through hole.

[0094] In other embodiments, a first guide portion 121 and a second guide portion 122 may be provided corresponding to the first pole through hole 111 and the second pole through hole 112, respectively; or, the first guide portion 121 provided corresponding to one of the first pole through hole 111 and the second pole through hole 112 may be used as the second guide portion 122 of the other; the second guide portion 122 provided corresponding to one of the first pole through hole 111 and the second pole through hole 112 may be used as the first guide portion 121 of the other; the specific configuration may vary depending on the actual situation and is not limited here.

[0095] The first guide section 121 is used to divert the fluid medium of the battery cell, and the second guide section 122 is used to merge the fluid medium of the battery cell. The specific implementation of the first guide section 121 and the second guide section 122 can be referred to the foregoing example and will not be repeated here.

[0096] Reference Figure 4 , Figure 5 In one embodiment, when the flow guiding structure 120 has a first flow guiding portion 121 and a second flow guiding portion 122, a fifth flow guiding portion 123 is included among the plurality of flow guiding members, and the fifth flow guiding portion 123 is spaced between the first flow guiding portion 121 and the second flow guiding portion 122.

[0097] For example, such as Figure 4 As shown, one end of the fifth flow guide 123 is disposed near the first side 1103 of the patch body 110, and the other end is disposed near the second side 1104 of the patch body 110. There can be one or more fifth flow guides 123. When there are multiple fifth flow guides 123, the multiple fifth flow guides 123 are disposed at intervals.

[0098] like Figure 4As shown, with the first terminal through-hole 111 located near the first end 1101 of the patch body 110 and the second terminal through-hole 112 located near the second end 1102 of the patch body 110 as an example, the fifth flow guide 123 is disposed between the first flow guide 121 and the second flow guide 122. This can prevent the fluid medium flowing out from the second flow guide 122 located corresponding to the first terminal through-hole 111 from flowing directly to the first flow guide 121 located corresponding to the second terminal through-hole 112, or even directly into the second terminal through-hole 112. This effectively guides the fluid medium out from the second end 1102 of the patch body 110 and improves the guiding efficiency of the fluid medium.

[0099] To address the issue of condensation forming on the battery surface and seeping into the inner side of the terminal post 220, electrolyte from the battery cell entering the terminal post, or other fluid media entering the terminal post, causing a short circuit between the terminal post 220 and the casing 300, and in severe cases even corrosion of the inner core 400 and casing 300, refer to... Figure 4 , Figure 5 In one embodiment, corresponding to the position of the terminal through hole, the patch body 110 is provided with an annular protrusion 130, which surrounds the terminal through hole. The annular protrusion 130 can be used to prevent condensed water, electrolyte or other fluid media from directly entering the terminal 220, causing a short circuit between the terminal 220 and the housing 300, or even causing corrosion of the housing 300, thereby extending the battery life.

[0100] For example, such as Figure 4 As shown, both sides of the patch body 110 are provided with water-retaining strips 140, which extend along the first direction D1. This allows fluid media to be discharged along the water-retaining strips 140. When the battery cells are used in battery packs or other battery systems, multiple battery cells are arranged along the second direction D2. The water-retaining strips 140 prevent fluid media such as moisture and electrolytes from entering the surrounding battery cells, and even the inner core 400 of the surrounding batteries.

[0101] This application, through the arrangement of the flow guiding structure 120, the water-blocking strip 140, and the annular protrusion 130, can guide the electrolyte, water formed by condensation, and other fluid media to flow out in a direction deviating from the electrode through hole, thereby preventing the fluid media from entering the electrode 220.

[0102] like Figure 4As shown in the embodiments of this application, there are two pole-end through holes, including a first pole-end through hole 111 and a second pole-end through hole 112 spaced apart along the first direction D1. The patch body 110 has a first end 1101 and a second end 1102 disposed opposite to each other along the first direction D1. One of the first pole-end through holes 111 and 112 is disposed near the first end 1101 of the patch body 110, and the other is disposed near the second end 1102 of the patch body 110. The flow guiding structure 120 includes multiple flow guiding elements, each of which is inclined toward the second end 1102. The multiple flow guiding elements are inclined in the same direction, which is intended to guide the fluid medium such as condensate water in different areas, reduce the water flow rate after collection, and prevent the fluid medium such as water after collection from directly entering the pole 220 through the pole-end through holes; when the annular protrusion 130 is provided, it can also effectively reduce the risk of the fluid medium such as water after collection directly impacting the annular protrusion 130 and causing the fluid medium such as water to enter the pole.

[0103] The flow guiding structure 120 of the cover patch 100 can optionally be implemented using the structures shown in the following three examples or other multiple structures:

[0104] Reference Figure 8 , Figure 9 , Figure 10 As an example:

[0105] At least some of the multiple flow guides are arranged parallel to each other and spaced apart. This effectively improves water conduction efficiency and prevents water from flowing into the area where the terminal 220 is located, thereby further reducing the risk of moisture entering the terminal 220, optimizing battery safety, and extending battery life. In implementation, the battery cell is placed sideways in the system, i.e., the first direction D1 corresponds to the vertical direction, and the flow guides are set at an angle towards the second end 1102 to utilize gravity to accelerate the flow rate and further prevent fluid medium from entering the terminal.

[0106] Reference Figure 2 , Figure 3 As another example:

[0107] Based on the aforementioned example, the flow guiding structure 120 has a first flow guiding portion 121 for diverting the fluid medium of the battery cell. The first flow guiding portion 121 is provided on the side of the electrode through hole near the first end 1101 of the patch body 110. The patch body 110 has a first side 1103 and a second side 1104 disposed opposite to each other. Among the plurality of flow guiding members, there are a first flow guiding member 1211 and a second flow guiding member 1212. The first flow guiding member 1211 is disposed near the first side 1103 and inclined toward the first side 1103. The second flow guiding member 1212 is disposed near the second side 1104 and inclined toward the second side 1104. The first flow guiding member 1211 and the second flow guiding member 1212 are alternately disposed to construct the first flow guiding portion 121.

[0108] The first guide section 121 diverts the fluid medium, guiding condensate, electrolyte, and other fluid media to the side of the patch body 110. This effectively increases the speed of moisture removal, optimizes the flow efficiency, and effectively prevents the fluid medium from entering the electrode post.

[0109] Furthermore, the flow guiding structure 120 has a second flow guiding portion 122 for converging the fluid medium of the battery cell, and the second flow guiding portion 122 is provided on the side of the electrode through hole near the second end 1102 of the patch body 110. Among the plurality of flow guiding elements, there are a third flow guiding element 1221 and a fourth flow guiding element 1222; the third flow guiding element 1221 is disposed near the first side 1103 and inclined toward the second side 1104; the fourth flow guiding element 1222 is disposed near the second side 1104 and inclined toward the first side 1103; the third flow guiding element 1221 and the fourth flow guiding element 1222 are alternately disposed to construct the second flow guiding portion 122.

[0110] The second guide section 122 collects fluid media such as condensate and electrolyte, and guides the collected fluid media to the second end 1102 of the patch body 110. In this way, the speed of moisture removal can be effectively improved, the flow efficiency can be optimized, and the situation of moisture flowing into the electrode post 220 can be further avoided.

[0111] Reference Figure 4 , Figure 5 As yet another example:

[0112] Based on the aforementioned example, the plurality of flow guides includes a fifth flow guide 123, which is spaced between the first flow guide 121 and the second flow guide 122. This is to prevent the fluid medium flowing out from the second flow guide 122 corresponding to the first electrode through-hole 111 from flowing directly into the first flow guide 121 corresponding to the second electrode through-hole 112, or even directly into the second electrode through-hole 112, thereby effectively guiding the fluid medium out from the second end 1102 of the patch body 110 and improving the guiding efficiency of the fluid medium.

[0113] Reference Figure 1 , Figure 2 This application also proposes a cover plate assembly, which includes a cover plate body 210 and a cover plate patch 100 as described in the above embodiment, wherein the cover plate patch 100 is disposed on the cover plate body 210.

[0114] The specific structure of the cover plate body 210 is as described in the above embodiments. Since this battery cell adopts all the technical solutions of all the above embodiments, it has at least all the beneficial effects brought about by the technical solutions of the above embodiments, which will not be described in detail here.

[0115] Reference Figure 1 This application also proposes a battery cell, including a housing 300, an inner core 400, a cover plate body 210, terminals, and a cover plate patch 100. The inner core 400 is disposed inside the housing 300; the cover plate body 210 is disposed on the housing 300; the terminals are disposed on the cover plate body 210; and the cover plate patch 100 is the same as the cover plate patch 100 in the above embodiment, and the cover plate patch 100 is disposed on the cover plate body 210.

[0116] The housing 300 is a hollow structure with open ends. The cover plate body 210 is set at the open end of the housing 300. The housing 300 and the cover plate set at the open end of the housing 300 form a sealed structure for accommodating the inner core 400.

[0117] Optionally, the cover plate body 210 is also provided with an injection hole. The injection hole is used to inject electrolyte into the battery to ensure that the electrolyte can flow smoothly into the battery and be evenly distributed to all parts of the inner core 400, so as to fully wet the inner core 400 and ensure the charging and discharging performance of the battery. The housing 300 can be open on one side or open on both sides. When the housing 300 is open on one side, a cover plate body 210 can be provided at one end of the opening of the housing 300; when the housing 300 is open on both sides, a cover plate body 210 can be provided at each end of the opening of the housing 300.

[0118] like Figure 1As shown, two terminals 220 are disposed on the cover body 210, including a positive terminal and a negative terminal spaced apart along the first direction D1. The inner core 400 includes a positive terminal and a negative terminal. The position of the positive terminal of the inner core 400 corresponds to the position of the positive terminal and is electrically connected to the positive terminal, and the position of the negative terminal corresponds to the position of the negative terminal and is electrically connected to the negative terminal, for outputting current. The cover plate patch 100 is disposed on the cover body 210 of the battery cell. The cover plate patch 100 includes a patch body 110 and a flow guiding structure 120. The patch body 110 has terminal through holes; the flow guiding structure 120 is disposed on the patch body 110; wherein, the flow guiding structure 120 guides the fluid medium to flow out in a direction deviating from the terminal through holes on the patch body 110.

[0119] By providing a flow guiding structure 120 on the patch body 110, the flow guiding structure 120 is used to guide the condensation and other fluid media formed on the surface of the cover patch 100 to flow out in a direction deviating from the electrode through-hole. This ensures that the fluid media flows along the flow guiding structure without passing through the electrode, effectively reducing the risk of moisture entering the electrode 220 and extending battery life. In addition to guiding the condensation out, the flow guiding structure 120 can also guide the electrolyte in the battery cell to flow out in a direction deviating from the electrode through-hole. This ensures that the electrolyte and other fluid media flow along the flow guiding structure without passing through the electrode, solving the problem of electrolyte flowing into the electrode 220 affecting battery performance and potentially causing internal short circuits in the battery cell. By optimizing the structure of the cover patch 100, the fluid media can be guided to flow out in a direction deviating from the electrode through-hole to an area far away from the electrode through-hole. The overall structure is simple, easy to manufacture, has low overall cost, and high manufacturability.

[0120] The specific structure of the cover plate patch 100 is as described in the above embodiments. Since this battery cell adopts all the technical solutions of all the above embodiments, it has at least all the beneficial effects brought about by the technical solutions of the above embodiments, which will not be described in detail here.

[0121] The above description is merely an exemplary embodiment of this application and does not limit the patent scope of this application. Any equivalent structural transformations made based on the technical concept of this application and the contents of the specification and drawings of this application, or direct / indirect applications in other related technical fields, are included within the patent protection scope of this application.

Claims

1. A cover plate patch, characterized in that, For mounting on the cover plate body of the battery cell; the cover plate patch includes: The patch body has through holes for electrode posts; A flow guiding structure is disposed on the patch body; The number of the electrode through holes is two, and the two electrode through holes include a first electrode through hole and a second electrode through hole that are spaced apart along a first direction. The patch body has a first end and a second end that are disposed opposite to each other along a first direction. The flow guiding structure includes a plurality of flow guiding elements. The flow guiding elements are disposed at an inclination toward the second end of the patch body. The flow guiding structure guides the fluid medium to flow out of the patch body in a direction that deviates from the electrode through hole.

2. The cover plate patch as described in claim 1, characterized in that, The patch body is provided with an annular protrusion, which surrounds the through hole of the pole post.

3. The cover plate patch as described in claim 1, characterized in that, Water-retaining strips are provided on both sides of the patch body, and the water-retaining strips extend along the first direction.

4. The cover plate patch as described in claim 1, characterized in that, The flow guiding structure has a first flow guiding section for diverting the fluid medium of the battery cell, and the first flow guiding section is provided on the side of the electrode through hole near the first end of the patch body.

5. The cover plate patch as described in claim 1, characterized in that, The flow guiding structure has a second flow guiding section for converging the fluid medium of the battery cell, and the second flow guiding section is provided on the side of the electrode through hole near the second end of the patch body.

6. The cover plate patch as described in claim 4, characterized in that, The patch body has a first side and a second side disposed opposite to each other, and the plurality of flow guides include a first flow guide and a second flow guide; The first guide is disposed close to the first side and is inclined toward the first side; The second guide is disposed close to the second side and is inclined toward the second side; The first flow guide and the second flow guide are alternately arranged to construct the first flow guide section.

7. The cover plate patch as described in claim 5, characterized in that, The patch body has a first side and a second side disposed opposite to each other, and the plurality of flow guides include a third flow guide and a fourth flow guide; The third guide is disposed close to the first side and inclined toward the second side; The fourth guide element is disposed close to the second side and inclined toward the first side; The third and fourth flow guides are alternately arranged to construct the second flow guide section.

8. The cover plate patch as described in claim 1, characterized in that, The flow guiding structure has a first flow guiding section and a second flow guiding section. The first flow guiding section is used to divert the fluid medium of the battery cell, and the second flow guiding section is used to merge the fluid medium of the battery cell. The plurality of flow guides includes a fifth flow guide, which is disposed between the first flow guide and the second flow guide.

9. A cover plate assembly, characterized in that, It includes a cover plate body and a cover plate patch as described in any one of claims 1-8, wherein the cover plate patch is disposed on the cover plate body.

10. A single battery cell, characterized in that, include: case; The inner core is disposed within the housing; The cover plate body is disposed on the housing; The pole post is disposed on the main body of the cover plate; as well as The cover plate patch as described in any one of claims 1-8, wherein the cover plate patch is disposed on the cover plate body.

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