A partition component, a top cover assembly, a battery and a battery module

Abstract

The application discloses a separation component, a top cover assembly, a battery and a battery module. The separation component comprises a body and a flow guide structure. The body comprises a first surface and a second surface opposite to each other. The body is provided with a first liquid injection hole penetrating through the first surface and the second surface. The flow guide structure comprises a plurality of arc-shaped flow guide ribs arranged on the second surface. The plurality of arc-shaped flow guide ribs are arranged around the periphery of the first liquid injection hole in a spaced manner, so as to guide at least part of electrolyte dropping from the first surface to the second surface through the first liquid injection hole. The separation component provided by the application can shorten the time of electrolyte infiltrating the battery cell, thereby improving the infiltration efficiency of the electrolyte.

Description

Technical Field

[0001] This application relates to the technical field of batteries, and particularly to a separation component, a top cover assembly, a battery, and a battery module. Background Art

[0002] The top cover assembly includes multiple components such as a top cover sheet and a separation component. Among them, the separation component is installed on the top cover sheet. Liquid injection holes are provided on both the top cover sheet and the separation component, and the liquid injection holes are eccentrically arranged. For example, in a cylindrical battery, the installation position of the pole post is set at the geometric center of the top cover sheet and the separation component, and the liquid injection hole is arranged close to the installation position of the pole post. In a rectangular battery, the installation position of the explosion-proof valve is set at the geometric center of the top cover sheet and the separation component. In the length direction of the top cover sheet, the liquid injection hole is located on either side of the installation position of the explosion-proof valve.

[0003] Due to the eccentric arrangement of the liquid injection holes, when injecting electrolyte into the liquid injection holes in the direction from the top cover sheet to the separation component, the electrolyte passing through the liquid injection holes first wets the battery cells close to the liquid injection holes, and then slowly wets the battery cells far from the liquid injection holes. It can be seen that the time for the electrolyte to wet the battery cells is prolonged, and the wetting efficiency of the electrolyte is reduced. Summary of the Invention

[0004] Aiming at the above deficiencies in the prior art, the present invention provides a separation component, a top cover assembly, a battery, and a battery module, which can shorten the time for the electrolyte to wet the battery cells, thereby improving the wetting efficiency of the electrolyte.

[0005] To solve the above technical problems, in a first aspect, the present invention provides a separation component, including:

[0006] A body, the body includes opposite first and second surfaces, and a first liquid injection hole penetrating through the first surface and the second surface is provided on the body;

[0007] A flow guiding structure, the flow guiding structure includes a plurality of arc-shaped flow guiding ribs provided on the second surface, and the plurality of arc-shaped flow guiding ribs are spaced around the periphery of the first liquid injection hole to guide at least part of the electrolyte dripping through the first liquid injection hole in the direction from the first surface to the second surface.

[0008] In the present invention, when the electrolyte passes through the first liquid injection hole in the direction from the first surface to the second surface, a part of the electrolyte passing through the first liquid injection hole vertically drops onto the battery cell near the first liquid injection hole under the action of gravity, and another part of the electrolyte passing through the first liquid injection hole flows towards the second surface under the action of liquid surface tension (because the electrolyte has a certain viscosity). Since there are multiple arc-shaped diversion ribs provided on the second surface, and the multiple arc-shaped diversion ribs are circumferentially spaced along the periphery of the first liquid injection hole at the four peripheral edges of the first liquid injection hole, therefore, the electrolyte flowing towards the second surface will be diverted by the multiple arc-shaped diversion ribs, and will be diverted by the diversion channels formed by every two adjacent arc-shaped diversion ribs among the multiple arc-shaped diversion ribs, so as to divert the electrolyte on the second surface to the periphery away from the first liquid injection hole with the first liquid injection hole as the center. Thus, the electrolyte diverted by the multiple arc-shaped diversion ribs can drop onto the battery cells far from the first liquid injection hole, so that while the battery cells near the first liquid injection hole are infiltrated, the battery cells far from the first liquid injection hole are infiltrated by the electrolyte diverted by the multiple arc-shaped diversion ribs, improving the infiltration efficiency of the electrolyte to the battery cells.

[0009] In addition, since the multiple arc-shaped diversion ribs can form multiple arc-shaped diversion channels, therefore, during the process of diverting the electrolyte by the arc-shaped diversion channels, the electrolyte can collide with the two arc-shaped diversion ribs forming the arc-shaped diversion channel multiple times, making the electrolyte in the arc-shaped diversion channel flow in different directions, so that the electrolyte leaving the arc-shaped diversion channel splashes at different angles, improving the uniformity of the electrolyte dropping, and further improving the effect of the electrolyte infiltrating the battery cells.

[0010] In a possible implementation manner of the first aspect, the arc lengths of the multiple arc-shaped diversion ribs near the geometric center of the body are greater than the arc lengths of the multiple arc-shaped diversion ribs far from the geometric center of the body.

[0011] Since the arc lengths of the multiple arc-shaped diversion ribs near the geometric center of the body are greater than the arc lengths of the multiple arc-shaped diversion ribs far from the geometric center of the body, therefore, the lengths of the arc-shaped diversion channels formed by the multiple arc-shaped diversion ribs near the geometric center of the body are longer, and can introduce more electrolyte to the battery cells near the geometric center of the body. The arc-shaped diversion channels formed by the multiple arc-shaped diversion ribs far from the geometric center of the body are shorter, and can introduce less electrolyte to the battery cells far from the geometric center of the body. It can be seen that the uniformity of the electrolyte infiltration is improved, and the effect of the electrolyte infiltrating the battery cells is further improved.

[0012] [[ID=1E]]In a possible implementation manner of the first aspect, the multiple arc-shaped diversion ribs all extend along the radial direction of the first liquid injection hole and away from the first liquid injection hole, and the bending directions of the multiple arc-shaped diversion ribs are all the same.

[0013] Since the bending directions of the multiple arc-shaped flow guiding ribs are the same, the electrolyte guided by the multiple arc-shaped flow guiding ribs can all drip onto the battery cell counterclockwise or all drip onto the battery cell clockwise, thereby improving the uniformity of the electrolyte guiding by the arc-shaped flow guiding ribs.

[0014] In a possible implementation manner of the first aspect, along the direction from the first liquid injection hole to the geometric center of the body, the arc lengths of the multiple arc-shaped flow guiding ribs increase.

[0015] Since the area of the battery cell gradually increases along the direction from the first liquid injection hole to the geometric center of the body, in order to further improve the wetting effect of the battery cell, the arc lengths of the multiple arc-shaped flow guiding ribs are made to increase in the direction from the first liquid injection hole to the geometric center of the body.

[0016] In a possible implementation manner of the first aspect, for the multiple arc-shaped flow guiding ribs close to the geometric center of the body, the included angle between every two adjacent arc-shaped flow guiding ribs is a1, and for the multiple arc-shaped flow guiding ribs far from the geometric center of the body, the included angle between every two adjacent arc-shaped flow guiding ribs is a2, and a1 > a2;

[0017] The included angle is configured as the included angle between the connecting lines of the centers of the first liquid injection hole and the end parts of two adjacent arc-shaped flow guiding ribs close to the first liquid injection hole on the second surface.

[0018] By making the included angle between every two adjacent arc-shaped flow guiding ribs among the multiple arc-shaped flow guiding ribs close to the geometric center of the body greater than the included angle between every two adjacent arc-shaped flow guiding ribs among the multiple arc-shaped flow guiding ribs far from the geometric center of the body, it can be made that the multiple arc-shaped flow guiding ribs close to the geometric center of the body guide more electrolyte to the battery cell close to the geometric center of the body, thereby further improving the uniformity of the electrolyte wetting.

[0019] In a possible implementation manner of the first aspect, along the radial direction of the first liquid injection hole and extending away from the first liquid injection hole, the distance between every two adjacent arc-shaped flow guiding ribs increases.

[0020] Thus, the widths of the plurality of arc-shaped diversion channels formed by the plurality of arc-shaped diversion rib strips increase along the radial direction of the first liquid injection hole and away from the first liquid injection hole. On the one hand, on the premise that the diversion channels divert the same flow rate of electrolyte, the velocity of the electrolyte at the end of the diversion channel close to the first liquid injection hole is greater than the velocity of the electrolyte at the end of the diversion channel away from the first liquid injection hole. In this way, when injecting electrolyte into the first liquid injection hole, the electrolyte in the diversion channel close to the first liquid injection hole can impact the electrolyte in the diversion channel away from the first liquid injection hole at a greater velocity, so that the electrolyte in the diversion channel splashes a farther distance along the diversion direction of the diversion channel, thereby improving the uniformity of electrolyte infiltration into the battery cell. On the other hand, the width of the arc-shaped diversion channel formed by every two adjacent arc-shaped diversion rib strips at the position away from the first liquid injection hole is increased, thereby increasing the flow rate of the electrolyte diverted by the diversion channel, and further enabling the electrolyte to flow to a position farther from the first liquid injection hole to meet the purpose of uniform and rapid infiltration of the battery cell.

[0021] In a possible implementation manner of the first aspect, the first end face of the arc-shaped diversion rib strip close to the first liquid injection hole is arc-shaped.

[0022] Thus, when the electrolyte passing through the first liquid injection hole spreads toward the second surface under the action of the surface tension of the liquid, the arc surface can reduce the resistance between the electrolyte and the arc-shaped diversion rib strip and shunt the electrolyte on the second surface. In addition, since the arc surface is arc-transitioned, the arc surface can also reduce the splash of the electrolyte near the first liquid injection hole, thereby ensuring the diversion flow rate of the electrolyte on the second surface by the arc-shaped diversion rib strip.

[0023] In a possible implementation manner of the first aspect, along the radial direction of the first liquid injection hole and away from the first liquid injection hole, the height of the arc-shaped diversion rib strip in the axial direction of the first liquid injection hole decreases.

[0024] Thus, by the height of the arc-shaped diversion rib strip in the axial direction of the first liquid injection hole decreasing along the radial direction of the first liquid injection hole and away from the first liquid injection hole, on the one hand, due to the relatively large height of the arc-shaped diversion rib strip close to the first liquid injection hole in the axial direction, it is convenient for the arc-shaped diversion rib strip to shunt the electrolyte at the first liquid injection hole. On the other hand, the electrolyte flowing toward the second surface is affected by the surface tension of the liquid. If the height of the arc-shaped diversion rib strip in the axial direction of the first liquid injection hole increases or is equal along the radial direction of the first liquid injection hole and away from the first liquid injection hole, a part of the electrolyte will adhere to the side wall of the arc-shaped diversion rib strip, resulting in waste of the electrolyte. Thus, the production cost can be reduced while ensuring the diversion of the electrolyte. In addition, it can also enable the electrolyte in the diversion channels formed by the plurality of arc-shaped diversion rib strips to drip smoothly onto the battery cell, avoiding the situation where the electrolyte concentrates and flows to the end of the arc-shaped diversion rib strip away from the first liquid injection hole.

[0025] In a possible implementation of the first aspect, the body is circular, and an arc-shaped support is provided at the edge of the second surface;

[0026] Along the axial direction of the first liquid injection hole, the height of the arc-shaped flow guiding rib is less than the height of the arc-shaped support.

[0027] Since the arc-shaped support extends into the housing of the cylindrical battery when the separation component is配合 with the housing of the cylindrical battery, if the height of the arc-shaped flow guiding rib is greater than or equal to the height of the arc-shaped support, on the one hand, it is necessary to reserve an installation space for the arc-shaped flow guiding rib in the housing of the cylindrical battery, resulting in a decrease in the energy density of the cylindrical battery. On the other hand, multiple隔档 spaces are formed between multiple arc-shaped flow guiding ribs, which affects the gas flow in the housing of the cylindrical battery and is not conducive to the opening of the explosion-proof valve. Therefore, the height of the arc-shaped flow guiding rib in the axial direction of the first liquid injection hole is less than the height of the arc-shaped support, which can not only提高 the energy density of the cylindrical battery but also facilitate the gas flow of the explosion-proof valve of the cylindrical battery, reducing the safety hazard of the cylindrical battery.

[0028] In a possible implementation of the first aspect, the arc-shaped support is fence-shaped.

[0029] Thus, the weight of the arc-shaped support can be reduced, thereby提高 the energy density of the cylindrical battery. In addition, the fence-shaped arc-shaped support can also play a buffering role for gas, thereby提高 the safety of the cylindrical battery.

[0030] In a possible implementation of the first aspect, along the axial direction of the first liquid injection hole, the height of the arc-shaped flow guiding rib is H, and 0.5mm ≤ H ≤ 1mm.

[0031] If the height of the arc-shaped flow guiding rib in the axial direction of the first liquid injection hole is less than 0.5mm, the分流 effect and flow guiding effect of the arc-shaped flow guiding rib on the electrolyte are不佳. If the height of the arc-shaped flow guiding rib in the axial direction of the first liquid injection hole is greater than 1mm, it will占用较多 installation space during the installation of the body, thus affecting the energy density of the battery. Based on this, through comprehensive consideration, the height of the arc-shaped flow guiding rib in the axial direction of the first liquid injection hole is between 0.5mm and 1mm. In this way, not only can the分流 and flow guiding effects of the arc-shaped flow guiding rib be保证, but the energy density of the battery can also be改善.

[0032] In a possible implementation of the first aspect, the body is rectangular, and along the length direction of the body, a防护凸起 is provided in the middle of the second surface, and a凹槽 is provided on the防护凸起. The凹槽 extends along the length direction of the body and贯穿 the防护凸起 on the opposite side walls of the body in the length direction;

[0033] In the direction pointing from the first surface to the second surface, the end of the arc-shaped diversion rib away from the first liquid injection hole is higher than the bottom of the groove or flush with the bottom of the groove.

[0034] If, in the direction pointing from the first surface to the second surface, the end of the arc-shaped diversion rib away from the first liquid injection hole is lower than the bottom of the groove, the side wall of the protective protrusion can prevent the electrolyte from dispersing in the direction towards the protective protrusion, thus affecting the dispersion effect of the electrolyte, and further affecting the effect of the electrolyte infiltrating the battery cell. Therefore, by making the end of the arc-shaped diversion rib away from the first liquid injection hole higher than the bottom of the groove or flush with the bottom of the groove in the axial direction of the first liquid injection hole, the groove can avoid the electrolyte dispersed towards the protective protrusion, so that the electrolyte can disperse a longer distance in the direction towards the protective protrusion, and further improve the diversion effect of the arc-shaped diversion rib and enhance the effect of the electrolyte infiltrating the battery cell.

[0035] In a possible implementation manner of the first aspect, the second end face of the arc-shaped diversion rib away from the first liquid injection hole is an arc surface.

[0036] Since the end of the arc-shaped diversion rib away from the first liquid injection hole is an arc surface, on the one hand, it can make the electrolyte at the end of the arc-shaped diversion rib away from the first liquid injection hole drop smoothly onto the battery cell, and on the other hand, it can also reduce the adhesion of the electrolyte at the end of the arc-shaped diversion rib away from the first liquid injection hole, thereby reducing the waste of the electrolyte.

[0037] In a second aspect, the present invention further provides a top cover assembly, including:

[0038] A top cover sheet, on which a second liquid injection hole is provided;

[0039] A separating component, which is the separating component described in the first aspect, and the first liquid injection hole in the separating component is coaxial with the second liquid injection hole;

[0040] A pole column, which sequentially passes through the separating component and the top cover sheet.

[0041] By the pole column sequentially passing through the separating component and the top cover sheet, the separating component can be fixed on the top cover sheet. Also, because the first liquid injection hole and the second liquid injection hole are coaxial, the electrolyte passing through the second liquid injection hole can quickly enter the first liquid injection hole, thus improving the liquid injection effect of the top cover assembly. In addition, since the separating component is the separating component in the first aspect, when the separating component is applied to the top cover assembly, the liquid injection effect of the top cover assembly can be further improved.

[0042] In a third aspect, the present invention further provides a battery, including:

[0043] A housing, which includes a containing cavity with an opening;

[0044] A battery cell, which is installed in the accommodating cavity;

[0045] A top cover assembly, which is the top cover assembly described in the second aspect, and is used to cover the opening.

[0046] Since the battery uses the top cover assembly in the second aspect, the performance and preparation efficiency of the battery are improved.

[0047] In the fourth aspect, the present invention further provides a battery module, including at least one battery described in the third aspect.

[0048] Since the battery module uses the battery in the third aspect, the performance of the battery module is improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0049] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following will briefly introduce the drawings required to be used in the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0050] Figure 1 A schematic structural view of a separation component from a perspective provided in an embodiment of the present invention;

[0051] Figure 2 A front view of the separation component provided in an embodiment of the present invention;

[0052] Figure 3 For Figure 1 A partial enlarged view of part A in

[0053] Figure 4 A schematic structural view of the separation component from another perspective provided in an embodiment of the present invention;

[0054] Figure 5 A schematic structural view of a plurality of arc-shaped flow guiding ribs provided at axial intervals around a first liquid injection hole in an embodiment of the present invention;

[0055] Figure 6 A front view of the separation component when the body is rectangular in an embodiment of the present invention;

[0056] Figure 7 For Figure 6 A schematic structural view of an arc-shaped flow guiding rib and a protective protrusion in the separation component in

[0057] Figure 8 For Figure 1 A partial enlarged view of part B in

[0058] Figure 9 Schematic diagram of the top cover assembly provided by an embodiment of the present invention;

[0059] Figure 10 Schematic diagram of the battery provided by an embodiment of the present invention;

[0060] Figure 11 Schematic diagram of the battery module provided by an embodiment of the present invention.

[0061] Explanation of reference numerals:

[0062] 100 - Separation component; 110 - Body; 111 - First surface; 112 - Second surface; 113 - First liquid injection hole; 114 - Arc support; 115 - Protection protrusion; 116 - Second mounting hole; 1151 - Groove; 120 - Flow - guiding structure; 121 - Arc flow - guiding rib

[0063] 200 - Top cover assembly; 210 - Top cover sheet; 211 - Second liquid injection hole; 212 - First mounting hole

[0064] 300 - Battery; 310 - Housing; 320 - Battery cell

[0065] 400 - Battery module.<​​​​​​​​​​​​Furthermore, the terms "installation," "setup," "equipped with," "connection," and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral structure; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium, or an internal connection between two devices, components, or parts. Those skilled in the art can understand the specific meaning of these terms in this invention based on the specific circumstances.

[0070] Furthermore, the terms "first," "second," etc., are primarily used to distinguish different devices, elements, or components (which may be the same or different in specific type and construction), and are not intended to indicate or imply the relative importance or quantity of the indicated devices, elements, or components. Unless otherwise stated, "a plurality of" means two or more.

[0071] As described in the background section of this application, the top cover assembly includes multiple components such as a top cover sheet and a separator. The separator is mounted on the top cover sheet. Both the top cover sheet and the separator are provided with liquid injection holes, which are eccentrically positioned. For example, in a cylindrical battery, the mounting position of the terminal post is located at the geometric center of the top cover sheet and the separator, and the liquid injection hole is located close to the mounting position of the terminal post. In a rectangular battery, the mounting position of the explosion-proof valve is located at the geometric center of the top cover sheet and the separator, and the liquid injection hole is located on either side of the mounting position of the explosion-proof valve along the length of the top cover sheet.

[0072] Due to the eccentric setting of the injection hole, when electrolyte is injected into the injection hole along the direction from the top cover plate to the separator, the electrolyte passing through the injection hole first wets the cells close to the injection hole, and then slowly wets the cells far from the injection hole. It can be seen that this prolongs the time for the electrolyte to wet the cells and reduces the wetting efficiency of the electrolyte.

[0073] To address the technical problems mentioned in the background art, this invention provides a separator, a top cover assembly, a battery, and a battery module. By providing multiple arc-shaped flow-guiding ribs on the second surface of the main body, and distributing these ribs circumferentially around the perimeter of the first injection hole, a portion of the electrolyte flowing through the first injection hole falls directly onto the battery cell under gravity, wetting the cell near the injection hole. The remaining electrolyte flows inward along the second surface under surface tension. The multiple arc-shaped flow-guiding ribs ensure that the electrolyte on the second surface... The electrolyte flows within the flow channels formed by two adjacent arc-shaped guide ribs. It can be seen that multiple arc-shaped guide ribs can separate the electrolyte on the second surface, and multiple flow channels formed by multiple arc-shaped guide ribs can guide the electrolyte on the second surface, thereby guiding a portion of the electrolyte away from the first injection hole. As a result, the electrolyte guided by multiple arc-shaped guide ribs can fall onto the battery cells away from the first injection hole, so that the battery cells near the first injection hole are wetted while the battery cells away from the first injection hole are wetted by the electrolyte guided by multiple arc-shaped guide ribs, thus improving the wetting efficiency of the battery cells by the electrolyte.

[0074] The present application will be described in detail below through specific embodiments:

[0075] See Figure 1 This application provides a separating component 100, which includes a body 110 and a flow guiding structure 120. The body 110 includes a first surface 111 and a second surface 112 facing each other, and a first injection hole 113 penetrating the first surface 111 and the second surface 112 is provided on the body 110. The flow guiding structure 120 includes a plurality of arc-shaped flow guiding ribs 121 disposed on the second surface 112, and the plurality of arc-shaped flow guiding ribs 121 are spaced around the periphery of the first injection hole 113 to guide the flow from the first surface 111 to the second surface 112 (i.e., Figure 1 (The direction indicated by the arrow X1 in the middle, and the direction from the first surface 111 to the second surface 112 mentioned below all refer to the direction indicated by the arrow X1) at least a portion of the electrolyte drips through the first injection hole 113.

[0076] Wherein, the first surface 111 and the second surface 112 refer to the thickness direction of the body 110 (i.e., Figure 1 The two opposing surfaces (in the direction indicated by the X arrow in the middle). In addition, the aforementioned plurality of arc-shaped guide ribs 121 are spaced around the periphery of the first injection hole 113. It should be understood that the arc-shaped guide ribs 121 extend radially along the first injection hole 113, and one end of the plurality of arc-shaped guide ribs 121 is distributed circumferentially around the first injection hole 113.

[0077] In this embodiment, when the electrolyte flows through the first injection hole 113 along the direction from the first surface 111 to the second surface 112, a portion of the electrolyte through the first injection hole 113 drips vertically onto the battery cell near the first injection hole 113 under the action of gravity. Another portion of the electrolyte through the first injection hole 113 flows towards the second surface 112 under the action of liquid surface tension (because the electrolyte has a certain viscosity). Since multiple arc-shaped guide ribs 121 are provided on the second surface 112, and these multiple arc-shaped guide ribs 121 are spaced around the perimeter of the first injection hole 113, the electrolyte flowing towards the second surface 112... The electrolyte is diverted by multiple arc-shaped guide ribs 121, and guided by the flow channels formed by every two adjacent arc-shaped guide ribs 121. This guides the electrolyte on the second surface 112 to flow away from the first injection hole 113, so that the electrolyte guided by the multiple arc-shaped guide ribs 121 can fall onto the battery cells away from the first injection hole 113. This ensures that the battery cells near the first injection hole 113 are wetted while the battery cells away from the first injection hole 113 are wetted by the electrolyte guided by the multiple arc-shaped guide ribs 121, thus improving the wetting efficiency of the battery cells by the electrolyte.

[0078] In addition, since multiple arc-shaped guide ribs 121 can form multiple arc-shaped guide channels, during the process of guiding the electrolyte through the arc-shaped guide channels, the electrolyte can collide with the two arc-shaped guide ribs 121 forming the arc-shaped guide channels multiple times, causing the electrolyte in the arc-shaped guide channels to flow in different directions. This causes the electrolyte leaving the arc-shaped guide channels to splash at different angles, improving the uniformity of electrolyte droplets and thus improving the effect of electrolyte wetting the battery cell.

[0079] Furthermore, the bending directions of the multiple arc-shaped guide ribs 121 can be the same or different. The following mainly uses the example of multiple arc-shaped guide ribs 121 having the same bending direction for detailed explanation.

[0080] In some possible embodiments, the plurality of arc-shaped guide ribs 121 are all radially away from the first injection hole 113 and in a direction away from the first injection hole 113 (i.e., Figure 1 Extending in the direction indicated by arrow x2, the bending directions of multiple arc-shaped guide ribs 121 are all the same.

[0081] It should be noted that the bending direction of the above-mentioned multiple arc-shaped guide ribs 121 is the same. It should be understood that along the circumference of the first injection hole 113, the multiple arc-shaped guide ribs 121 are bent in a counterclockwise direction or the multiple arc-shaped guide ribs 121 are bent in a clockwise direction.

[0082] Since the bending direction of the multiple arc-shaped flow guide ribs 121 is the same, the electrolyte guided by the multiple arc-shaped flow guide ribs 121 can drip onto the battery cell in a counterclockwise direction or in a clockwise direction, thereby improving the uniformity of flow guidance by the arc-shaped flow guide ribs 121.

[0083] Because the first injection hole 113 is eccentrically positioned, and the center of the battery cell is on the same line as the geometric center of the body 110, the area of ​​the battery cell closer to the geometric center of the body 110 is larger than the area of ​​the battery cell farther from the geometric center of the body 110. Based on this, in order to improve the uniformity of battery cell wetting, in some possible embodiments, see... Figure 1 The arc length of the multiple arc-shaped guide ribs 121 near the geometric center of the body 110 is greater than the arc length of the multiple arc-shaped guide ribs 121 far from the geometric center of the body 110.

[0084] The geometric center of the body 110 refers to the center of the geometric shape formed by the four edges of the body 110, that is... Figure 1 The position indicated by the arrow x1 in the middle. In addition, the arc length of the arc-shaped guide rib 121 refers to the extension length of the arc-shaped guide rib 121 within the second surface 112.

[0085] In this embodiment, since the arc length of the multiple arc-shaped flow guide ribs 121 near the geometric center of the body 110 is greater than the arc length of the multiple arc-shaped flow guide ribs 121 far from the geometric center of the body 110, the arc-shaped flow guide channel formed by the multiple arc-shaped flow guide ribs 121 near the geometric center of the body 110 is longer, which can introduce more electrolyte into the battery cell near the geometric center of the body 110, and the arc-shaped flow guide channel formed by the multiple arc-shaped flow guide ribs 121 far from the geometric center of the body 110 is shorter, which can introduce less electrolyte into the battery cell far from the geometric center of the body 110. It can be seen that the uniformity of electrolyte wetting is improved, and the effect of electrolyte wetting of the battery cell is further improved.

[0086] Furthermore, in some possible embodiments, the direction along the first injection hole 113 pointing towards the geometric center of the body 110 (i.e., Figure 1 The direction indicated by the x3 arrow (the direction from which the first injection hole 113 points to the geometric center of the body 110 mentioned below refers to the direction indicated by the x3 arrow) and the arc length of the multiple arc-shaped guide ribs 121 increases progressively.

[0087] Since the area of ​​the battery cell gradually increases along the direction from the first injection hole 113 to the geometric center of the body 110, in order to further improve the wetting effect of the battery cell, in this embodiment the arc length of the multiple arc-shaped guide ribs 121 increases in the direction from the first injection hole 113 to the geometric center of the body 110.

[0088] In some possible embodiments, see Figure 2 The included angle between any two adjacent arc-shaped guide ribs 121 near the geometric center of the body 110 is a1, and the included angle between any two adjacent arc-shaped guide ribs 121 away from the geometric center of the body 110 is a2, where a1 > a2; the included angle is configured as the angle between the lines connecting the ends of two adjacent arc-shaped guide ribs 121 near the first injection hole 113 on the second surface 112 and the center of the first injection hole 113.

[0089] Therefore, since the area of ​​the battery cell near the geometric center of the body 110 is larger, the included angle between each two adjacent arc-shaped guide ribs 121 near the geometric center of the body 110 is greater than the included angle between each two adjacent arc-shaped guide ribs 121 far from the geometric center of the body 110. This allows the multiple arc-shaped guide ribs 121 near the geometric center of the body 110 to guide more electrolyte to the battery cell near the geometric center of the body 110, thereby further improving the uniformity of electrolyte wetting.

[0090] In some possible embodiments, see Figure 1 and Figure 2 Along the radial direction of the first injection hole 113 and away from the first injection hole 113 (i.e., Figure 1 The direction indicated by the x2 arrow (the radial direction of the first injection hole 113 mentioned below and the direction away from the first injection hole 113 all refer to the direction indicated by the x2 arrow) and the spacing between each two adjacent arc-shaped guide ribs 121 increases.

[0091] Therefore, the width of the multiple arc-shaped flow channels formed by the multiple arc-shaped flow guide ribs 121 increases radially away from the first injection hole 113. On the one hand, under the premise that the flow channels guide the same flow rate of electrolyte, the velocity of the electrolyte at the end of the flow channel closer to the first injection hole 113 is greater than the velocity of the electrolyte at the end of the flow channel farther from the first injection hole 113. In this way, when electrolyte is injected into the first injection hole 113, the electrolyte in the flow channel closer to the first injection hole 113 can flow at a greater velocity. The impact of the electrolyte in the flow channel away from the first injection hole 113 causes the electrolyte in the flow channel to splash a greater distance along the flow direction of the flow channel, thereby improving the uniformity of electrolyte wetting of the battery cell. On the other hand, it increases the width of the arc-shaped flow channel formed by each two adjacent arc-shaped flow guide ribs 121 at the distance away from the first injection hole 113, thereby increasing the flow rate of electrolyte in the flow channel, so that the electrolyte can flow to a position further away from the first injection hole 113, in order to meet the purpose of uniform and rapid wetting of the battery cell.

[0092] In some possible embodiments, see Figure 3 The first end face of the arc-shaped guide rib 121 near the first injection hole 113 is arc-shaped.

[0093] It should be noted that the end of the arc-shaped guide rib 121 near the first injection hole 113 is arc-shaped. It should be understood that the end face of the arc-shaped guide rib 121 near the first injection hole 113 can be an arc surface or a hemispherical surface, and the arc shape protrudes in the direction away from the first injection hole 113 relative to the first end face.

[0094] Therefore, when the electrolyte through the first injection hole 113 spreads to the second surface 112 under the action of surface tension, the arc surface can reduce the resistance between the electrolyte and the arc-shaped guide rib 121 and divert the electrolyte on the second surface 112. In addition, since the arc surface is a circular transition, it can also reduce the splashing of electrolyte near the first injection hole 113, thereby ensuring the flow rate of electrolyte on the second surface 112 guided by the arc-shaped guide rib 121.

[0095] In some possible embodiments, see Figure 4 Along the radial direction of the first injection hole 113 and away from the first injection hole 113, the arc-shaped guide rib 121 is axially (i.e., along the first injection hole 113) in the direction away from the first injection hole 113. Figure 4 The height decreases in the direction indicated by the X arrow (and the axial direction of the first injection hole 113 mentioned in the afternoon also refers to the direction indicated by the X arrow).

[0096] Therefore, by the arc-shaped guide rib 121 decreasing in axial height along the radial direction away from the first injection hole 113, on the one hand, the arc-shaped guide rib 121 near the first injection hole 113 has a larger axial height, which facilitates the diversion of electrolyte at the first injection hole 113. On the other hand, the electrolyte flowing towards the second surface 112 is affected by the surface tension of the liquid. If the arc-shaped guide rib 121 at the first injection hole 113 has a larger axial height, it can facilitate the diversion of electrolyte at the first injection hole 113. The axial height increases or remains constant along the radial direction away from the first injection hole 113. Some electrolyte will adhere to the side wall of the arc-shaped guide rib 121, resulting in electrolyte waste. Therefore, production costs can be reduced while ensuring electrolyte diversion. In addition, the electrolyte in the guide channel formed by multiple arc-shaped guide ribs 121 can drip smoothly onto the battery cell, avoiding the situation where the electrolyte flows to the end of the arc-shaped guide rib 121 away from the first injection hole 113.

[0097] In some possible embodiments, see Figure 4The body 110 is circular, and an arc-shaped support 114 is provided on the edge of the second surface 112; along the axial direction of the first injection hole 113, the height of the arc-shaped guide rib 121 is less than the height of the arc-shaped support 114.

[0098] For example, when the separator 100 is applied to a cylindrical battery, the geometric center of the body 110 is provided with a mounting hole for the terminal post, and an arc-shaped support (the arc shape of the arc-shaped support corresponds to the outline arc shape of the body 110) is provided at the edge of the body 110 for mating with the casing of the cylindrical battery.

[0099] Because the arc-shaped support extends into the cylindrical battery casing when the separator 100 mates with the cylindrical battery casing, if the height of the arc-shaped flow guide rib 121 is greater than or equal to that of the arc-shaped support 114, on the one hand, the cylindrical battery casing needs to reserve space for the installation of the arc-shaped flow guide rib 121, resulting in a decrease in the energy density of the cylindrical battery; on the other hand, multiple arc-shaped flow guide ribs 121 form multiple partition spaces, which affects the airflow inside the cylindrical battery casing and is not conducive to the opening of the explosion-proof valve. Therefore, the axial height of the arc-shaped flow guide rib 121 at the first injection hole 113 is less than the height of the arc-shaped support 114, which can improve the energy density of the cylindrical battery and facilitate the airflow of the explosion-proof valve of the cylindrical battery, reducing the safety hazards of the cylindrical battery.

[0100] In some possible embodiments, the arc-shaped support 114 is in the form of a fence.

[0101] This reduces the weight of the arc-shaped support 114, thereby increasing the energy density of the cylindrical battery. In addition, the grid-like arc-shaped support 114 can also buffer the gas, thus improving the safety of the cylindrical battery.

[0102] In some possible embodiments, see Figure 4 and Figure 5 Along the axial direction of the first injection hole 113, the height of the arc-shaped guide rib 121 is H, 0.5mm≤H≤1mm.

[0103] The height H of the aforementioned arc-shaped guide rib 121 refers to the height of the arc-shaped guide rib 121 at any point along its length.

[0104] If the height of the arc-shaped flow guide rib 121 in the axial direction of the first injection hole 113 is less than 0.5 mm, the flow guide rib 121 will not have a good effect on the diversion and flow of electrolyte. If the height of the arc-shaped flow guide rib 121 in the axial direction of the first injection hole 113 is greater than 1 mm, it will occupy more installation space when the body 110 is installed, thus affecting the energy density of the battery. Based on this, through comprehensive consideration, the height of the arc-shaped flow guide rib 121 in the axial direction of the first injection hole 113 is between 0.5 mm and 1 mm. In this way, the diversion and flow of the arc-shaped flow guide rib 121 can be guaranteed, and the energy density of the battery can also be improved.

[0105] In some possible embodiments, see Figure 6 and Figure 7 The body 110 is rectangular, and along the length direction of the body 110 (i.e., ... Figure 7 (In the direction indicated by the Y-arrow in the middle), a protective protrusion 115 is provided in the middle of the second surface 112, and a groove 1151 is provided on the protective protrusion 115. The groove 1151 extends along the length direction of the body and penetrates the two opposite side walls of the protective protrusion 115 in the length direction of the body 110. Along the direction from the first surface 111 to the second surface 112, the end of the arc-shaped guide rib 121 away from the first injection hole 113 is higher than the bottom of the groove 1151 or flush with the bottom of the groove 1151 (for example, see...). Figure 7 The bottom of the groove 1151 is h1 away from the end of the arc-shaped guide rib 121 that is far from the first injection hole 113.

[0106] When the body 110 is rectangular, the separator 100 is applied to the rectangular battery. In the rectangular battery, a protective protrusion 115 is provided in the middle of the body 110, and a groove 1151 is provided on the protective protrusion 115. Along the length direction of the body 110, the projection of the end of the arc-shaped guide rib 121 away from the first injection hole 113 is located in the groove 1151.

[0107] If, along the direction from the first surface 111 to the second surface 112, the end of the arc-shaped guide rib 121 away from the first injection hole 113 is lower than the bottom of the groove 1151, the sidewall of the protective protrusion 115 can prevent the electrolyte from dispersing in the direction toward the protective protrusion 115, thereby affecting the dispersion effect of the electrolyte and thus affecting the effect of the electrolyte wetting the battery cell. Therefore, by having the end of the arc-shaped guide rib 121 away from the first injection hole 113 axially higher than or flush with the bottom of the groove 1151, the groove can prevent the electrolyte from dispersing toward the protective protrusion 115, thereby allowing the electrolyte to disperse a greater distance in the direction toward the protective protrusion 115, thus improving the guiding effect of the arc-shaped guide rib 121 and enhancing the effect of the electrolyte wetting the battery cell.

[0108] In addition, the protective protrusion 115 can be used for explosion-proof valve gates, battery cell limit parts, etc.

[0109] In some possible embodiments, see Figure 8 The end of the arc-shaped guide rib 121 away from the first injection hole 113 is an arc surface.

[0110] Since the end of the arc-shaped flow guide rib 121 away from the first injection hole 113 is an arc surface, on the one hand, the electrolyte at the end of the arc-shaped flow guide rib 121 away from the first injection hole 113 can fall smoothly onto the battery cell, and on the other hand, the electrolyte adhesion at the end of the arc-shaped flow guide rib 121 away from the first injection hole 113 can be reduced, thereby reducing electrolyte waste.

[0111] See Figure 9 This application embodiment also provides a top cover assembly 200, which includes a top cover sheet 210, a separator 100 and an electrode post, wherein the top cover sheet 210 is provided with a second liquid injection hole 211; the first liquid injection hole 113 in the separator 100 is coaxial with the second liquid injection hole 211.

[0112] In this embodiment, the partition component 100 may have the same structure as any of the partition components 100 in the above embodiments and may bring the same or similar beneficial effects. For details, please refer to the description in the above embodiments. This embodiment will not repeat the description here.

[0113] In addition, the top cover assembly 200 can be applied to both rectangular and cylindrical batteries.

[0114] Specifically, a first mounting hole 212 is provided on the top cover plate 210, and a second mounting hole 116 coaxial with the first mounting hole 212 is provided on the partition component 100, with the pole post passing through the first mounting hole 212 and the second mounting hole 116 in sequence.

[0115] In this embodiment, by sequentially inserting the electrode post through the separator 100 and the top cover plate 210, the separator 100 can be fixed to the top cover plate 210. Since the first injection hole 113 and the second injection hole 211 are coaxial, the electrolyte through the second injection hole 211 can quickly enter the first injection hole 113, thereby improving the liquid injection effect of the top cover assembly 200. In addition, since the separator 100 is the separator 100 in the above embodiment, when the separator 100 is applied to the top cover assembly 200, the liquid injection effect of the top cover assembly 200 can be further improved.

[0116] It is worth noting that, considering the injection effect, the diameters of the first injection hole 113 and the second injection hole 211 can be made equal.

[0117] SeeFigure 10 This application also provides a battery 300, which includes a housing 310, an electrode assembly 320, and a top cover assembly 200. The housing 310 includes a receiving cavity with an opening; the electrode assembly 320 is installed in the receiving cavity; and the top cover assembly 200 is the top cover assembly 200 in the above embodiment, which is used to cover the opening.

[0118] Since the battery 300 in this embodiment uses the top cover assembly 200 in the above embodiment, the performance and manufacturing efficiency of the battery 300 are improved.

[0119] It should be noted that the electrode assembly 320 includes a battery cell, tabs connected to the battery cell, and adapters connected to the tabs. The battery 300 can be a cylindrical battery or a rectangular battery.

[0120] See Figure 11 This application also provides a battery module 400, which includes at least the battery 300 in the above embodiments.

[0121] Since the battery module 400 in this embodiment uses the battery 300 in the above embodiment, the performance of the battery module 400 is improved.

[0122] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A separating component, characterized in that, Comprising: A body (110), the body (110) includes opposite first and second surfaces (111, 112), and a first liquid injection hole (113) passing through the first surface (111) and the second surface (112) is provided on the body (110); A flow guiding structure (120), the flow guiding structure (120) includes a plurality of arc-shaped flow guiding ribs (121) provided on the second surface (112), and the plurality of arc-shaped flow guiding ribs (121) are spaced around the four peripheral edges of the first liquid injection hole (113) to guide at least part of the electrolyte dripping through the first liquid injection hole (113) in the direction from the first surface (111) to the second surface (112); The included angle between two adjacent arc-shaped flow guiding ribs (121) close to the geometric center of the body (110) is a1, and the included angle between two adjacent arc-shaped flow guiding ribs (121) far from the geometric center of the body (110) is a2, and a1 > a2; The included angle is configured as the included angle between the connecting lines of the centers of the first liquid injection hole (113) and the end portions of two adjacent arc-shaped flow guiding ribs (121) close to the first liquid injection hole (113) on the second surface (112).

2. The separating component according to claim 1, characterized in that, The plurality of arc-shaped flow guiding ribs (121) all extend along the radial direction of the first liquid injection hole (113) and away from the first liquid injection hole (113), and the bending directions of the plurality of arc-shaped flow guiding ribs (121) are the same.

3. The separation component according to claim 1, wherein The arc lengths of the plurality of arc-shaped flow guiding ribs (121) close to the geometric center of the body (110) are greater than the arc lengths of the plurality of arc-shaped flow guiding ribs (121) far from the geometric center of the body (110).

4. The separating component according to claim 3, characterized in that, Along the direction from the first liquid injection hole (113) to the geometric center of the body (110), the arc lengths of the plurality of arc-shaped flow guiding ribs (121) increase.

5. The separating component according to claim 1, characterized in that, Along the direction extending radially away from the first liquid injection hole (113), the distance between every two adjacent arc-shaped flow guiding ribs (121) increases.

6. The separating component according to claim 1, characterized in that, The first end surface of the arc-shaped flow guiding rib (121) close to the first liquid injection hole (113) is arc-shaped.

7. The separation component according to claim 1, wherein Along the direction extending radially away from the first liquid injection hole (113), the height of at least part of the arc-shaped flow guiding ribs (121) in the axial direction of the first liquid injection hole (113) decreases.

8. The separating component according to any one of claims 1-7, characterized in that, The body (110) is circular, and an arc-shaped support (114) is provided at the edge of the second surface (112); Along the axial direction of the first liquid injection hole (113), the height of the arc-shaped flow guiding rib (121) is less than the height of the arc-shaped support (114).

9. The separating component according to claim 8, characterized in that, Along the axial direction of the first liquid injection hole (113), the height of the arc-shaped flow guiding rib (121) is H, and 0.5 mm ≤ H ≤ 1 mm.

10. The separating component according to claim 8, characterized in that, The arc-shaped support member (114) is fence-shaped.

11. The separating member according to any one of claims 1-7, characterized in that, The body (110) is rectangular. Along the length direction of the body (110), a protection protrusion (115) is provided in the middle of the second surface (112). A groove (1151) is provided on the protection protrusion (115). The groove (1151) extends along the length direction of the body (110) and penetrates through the opposite side walls of the protection protrusion (115) in the length direction of the body (110). Along the direction from the first surface (111) to the second surface (112), the end of the arc-shaped flow guiding rib (121) far from the first liquid injection hole (113) is higher than the bottom of the groove (1151) or flush with the bottom of the groove (1151).

12. The separating member according to any one of claims 1-7, characterized in that, The second end face of the arc-shaped flow guiding rib (121) far from the first liquid injection hole (113) is an arc surface.

13. A top cover assembly, characterized in that, Comprising: A top cover sheet (210) with a second liquid injection hole (211) provided thereon. A separation component (100), which is the separation component (100) according to any one of claims 1-12. The first liquid injection hole (113) in the separation component (100) is coaxial with the second liquid injection hole (211).

14. A battery, characterized in that, Comprising: A housing (310), which includes a containing cavity with an opening. An electrode assembly (320), which is installed in the containing cavity. A top cover assembly (200), which is the top cover assembly (200) according to claim 13 and is used to cover the opening.

15. A battery module, characterized in that, Including at least one battery (300) according to claim 14.

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