Battery top cover structure and power battery

Abstract

The utility model relates to a battery top cover structure and a power battery. The battery top cover structure comprises a base plate, the base plate is provided with a first mounting hole for a pole to penetrate through, the first mounting hole penetrates through the top surface and the bottom surface of the base plate along the thickness direction of the base plate, the top surface of the base plate is provided with a knurled boss and a reinforcing rib, the knurled boss is arranged on the periphery of the first mounting hole, and the reinforcing rib is connected with the inner wall of the knurled boss. According to the battery top cover structure, the knurled bosses and the reinforcing ribs are arranged on the top surface of the base plate, so that the thrust resistance and the pull resistance of the weak part of the base plate can be increased, the deformation capacity of the weak part of the base plate can be improved, and the service life of a power battery can be prolonged; the contact area of the upper plastic part and the substrate can be increased, the combination stability of the upper plastic part and the substrate is improved, the connection strength of the upper plastic part and the substrate is enhanced, the overall structural strength of the battery top cover is improved, and the reliability of the battery is improved; and the anti-pressing and anti-twisting capabilities of the pole can also be improved.

Description

Technical Field

[0001] The present application relates to the field of battery technology, and in particular to a battery top cover structure and a power battery. Background Art

[0002] Currently, the new energy industry is developing rapidly, the share of new energy vehicles is gradually increasing, and the demand for new energy power batteries is also rising. With the continuous improvement of battery technology, the current requirements for power battery capacity and energy density are also increasing.

[0003] Power batteries are primarily composed of a housing, battery cells, and a top cover. A common lithium battery top cover structure is a pole-integrated injection-molded top cover, which includes a substrate, an upper plastic part, a lower plastic part, and a pole. The upper plastic part, substrate, and lower plastic part are stacked in sequence, and the substrate cover is mounted on top of the housing to encapsulate the battery cells within the housing. The poles penetrate the lower plastic part, substrate, and upper plastic part in sequence and connect to the terminals, thereby connecting the battery cells to the external circuit. However, when power batteries are exposed to high-frequency vibration for a long time, the force on the poles of the battery top cover will be transferred to the substrate, causing deformation at the area where the substrate and poles meet, shortening the battery's service life. Utility Model Content

[0004] Based on this, it is necessary to provide a battery top cover structure and a power battery to address the problem of deformation of the mating portion between the substrate and the pole when the power battery is exposed to a high-frequency vibration environment for a long time.

[0005] A battery top cover structure includes a substrate having a first mounting hole for a pole to pass through, the first mounting hole penetrating the top and bottom surfaces of the substrate along the thickness direction of the substrate, a knurled boss and a reinforcing rib are provided on the top surface of the substrate, the knurled boss is provided on the outer periphery of the first mounting hole, and the reinforcing rib is connected to the inner wall of the knurled boss.

[0006] The above-mentioned battery top cover structure, by providing knurled bosses and reinforcing ribs on the top surface of the base plate, can not only increase the thrust and tensile resistance of the weak parts of the base plate, improve the deformation capacity of the weak parts of the base plate, and extend the service life of the power battery; it can also increase the contact area between the upper plastic part and the base plate, improve the bonding stability of the upper plastic part and the base plate, enhance the connection strength between the upper plastic part and the base plate, improve the overall structural strength of the battery top cover, and improve the reliability of the battery; it can also improve the anti-pressure and anti-torsion capabilities of the pole.

[0007] In one embodiment, the inner wall of the knurled boss has a crest portion and a trough portion, the crest portion is close to the central axis of the first mounting hole, and the reinforcing rib extends from the trough portion toward the central axis of the first mounting hole.

[0008] The inner wall of the knurled boss can be regarded as a wavy inner wall, that is, the inner wall of the knurled boss is alternately provided with multiple crests and troughs along the circumferential direction, the crests are close to the central axis of the first mounting hole, and the troughs are far away from the central axis of the first mounting hole. Extending the reinforcing ribs from the troughs toward the central axis of the first mounting hole can increase the length of the reinforcing ribs, which can effectively improve the deformation capacity of the weak parts of the substrate.

[0009] In one embodiment, the reinforcing rib has a first surface close to the central axis of the first mounting hole, and the first surface is flush with the inner wall of the first mounting hole.

[0010] Such an arrangement can not only increase the length of the reinforcing ribs as much as possible, effectively improve the deformation capacity of the weak parts of the substrate, but also avoid the penetration of the poles.

[0011] In one embodiment, the circumferential width of the trough portion is W0, and the circumferential width of the reinforcing rib is W1, then 0<W1≤W0.

[0012] In one embodiment, the number of the trough portions is set to n, and the number of the reinforcing ribs is set to x, then 2≤x≤n.

[0013] In one embodiment, the top surface of the reinforcing rib is lower than the top surface of the knurled boss.

[0014] Such an arrangement allows a certain space to be provided on the top of the knurled boss, which can accommodate a portion of the upper plastic part, thereby increasing the connection strength between the upper plastic part and the knurled boss.

[0015] In one embodiment, the width of the reinforcing rib gradually increases from the top surface to the bottom surface of the substrate.

[0016] The reinforcing ribs of this structure are not only convenient for supporting the upper plastic part, but also, through the structure setting of narrow top and wide bottom, the upper part of the reinforcing ribs has a certain space to accommodate a part of the upper plastic part, which can increase the connection strength between the upper plastic part and the knurled boss.

[0017] In one embodiment, the battery top cover structure further includes a terminal post, an upper plastic part, and a lower plastic part;

[0018] The pole extends from the first mounting hole and pushes the lower plastic part so that the lower plastic part is close to the bottom surface of the substrate;

[0019] The upper plastic part is integrally formed by injection molding with the knurled boss and the base plate, and covers the outer peripheral surface of the pole.

[0020] In one embodiment, one of the outer circumferential surface of the pole and the inner circumferential surface of the upper plastic part is provided with a card slot, and the other is provided with a card platform, and the card platform is accommodated in the card slot.

[0021] With the above arrangement, the card platform and the card slot can be matched to increase the injection molding area of ​​the upper plastic part and the pole, thereby improving the bonding strength between the pole and the upper plastic part.

[0022] A power battery comprising a housing, a battery cell and a battery top cover structure as described above;

[0023] The battery core is arranged in the shell, and the battery top cover structure is installed on the top of the shell and connected to the battery core.

[0024] The above-mentioned power battery, by providing knurled bosses and reinforcing ribs on the top surface of the base plate of the battery top cover structure, can increase the thrust and tensile resistance of the weak parts of the base plate, improve the deformation capacity of the weak parts of the base plate, and extend the service life of the power battery; it can also increase the contact area between the upper plastic part and the base plate, improve the bonding stability of the upper plastic part and the base plate, enhance the connection strength of the upper plastic part and the base plate, improve the overall structural strength of the battery top cover, and improve the reliability of the battery; it can also improve the anti-pressure and anti-torsion capabilities of the pole. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 A schematic structural diagram of a battery top cover structure provided in one embodiment of the present application.

[0026] Figure 2 for Figure 1 Exploded diagram of the battery top cover structure.

[0027] Figure 3 for Figure 1 Cross-section at AA;

[0028] Figure 4 for Figure 3 A partial enlarged schematic diagram at point B.

[0029] Figure 5 for Figure 1 Schematic diagram of the structure of the substrate of the battery top cover structure.

[0030] Figure 6 for Figure 5 A partial enlarged schematic diagram at point C.

[0031] The reference numerals in the accompanying drawings are described as follows:

[0032] 10. Battery top cover structure; 100. Base plate; 110. First mounting hole; 120. Knurled boss; 121. Wave crest; 122. Wave trough; 130. Reinforcement rib; 131. First surface; 140. Explosion-proof vent; 200. Post; 200a. Card slot; 210. Bottom plate; 220. Sealing ring; 300. Upper plastic part; 310. Card platform; 400. Lower plastic part; 410. Second mounting hole; 411. Step surface; 420. Explosion-proof cavity; 500. Explosion-proof valve; 510. Protective patch; 520. Aluminum sheet. DETAILED DESCRIPTION

[0033] To make the above-mentioned objects, features, and advantages of the present application more clearly understood, the specific embodiments of the present application are described in detail below with reference to the accompanying drawings. The following description sets forth many specific details to facilitate a full understanding of the present application. However, the present application can be implemented in many other ways than those described herein, and those skilled in the art can make similar improvements without violating the scope of the present application. Therefore, the present application is not limited to the specific embodiments disclosed below.

[0034] In the description of this application, it should be understood that if the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. appear, the orientation or position relationship indicated by these terms is based on the orientation or position relationship shown in the accompanying drawings, which is only for the convenience of describing this application and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on this application.

[0035] In addition, if the terms "first" or "second" appear, these terms are used for descriptive purposes only and should not be understood to indicate or imply relative importance or implicitly specify the number of technical features indicated. Therefore, a feature specified as "first" or "second" may explicitly or implicitly include at least one of such features. In the description of this application, if the term "plurality" appears, "plurality" means at least two, for example, two, three, etc., unless otherwise specifically defined.

[0036] In this application, unless otherwise specified or limited, the terms "mounted," "connected," "connected," "fixed," etc., should be interpreted broadly. For example, these terms may refer to fixed connections, removable connections, or integration; mechanical connections or electrical connections; direct connections or indirect connections through an intermediary; and internal communication between two components or interaction between two components, unless otherwise specified. Those skilled in the art will understand the specific meanings of these terms in this application based on the specific circumstances.

[0037] In this application, unless otherwise expressly specified or limited, if a first feature is described as being "above" or "below" a second feature, or similar descriptions, this may mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediate medium. Furthermore, when a first feature is described as being "above," "above," or "above" a second feature, it may mean that the first feature is directly above or diagonally above the second feature, or simply means that the first feature is at a higher level than the second feature. When a first feature is described as being "below," "below," or "below" a second feature, it may mean that the first feature is directly below or diagonally below the second feature, or simply means that the first feature is at a lower level than the second feature.

[0038] It should be noted that if an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be an intermediate element. If an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be an intermediate element. If any, the terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used in this application are for illustrative purposes only and do not represent the only embodiment.

[0039] As a crucial component of battery packaging, the battery cover primarily protects the battery cell, preventing chemical leakage and environmental impact. Traditional, integrated, injection-molded battery cover components typically consist of a base plate, an upper molded part, a lower molded part, and the battery cell. The upper, base plate, and lower molded parts are stacked in sequence. The base plate is attached to the top of the housing to encapsulate the battery cell. The battery cell extends through the lower, base plate, and upper molded parts, connecting to the terminals and external circuitry. A sealing ring is fitted around the outside of the battery cell, sealing the gap between the battery cell and the base plate to ensure airtightness. A base plate is located at the bottom of the battery cell, pushing against the lower molded part to keep it in contact with the base plate. The portion of the base plate that mates with the battery cell also mates with the sealing ring and base plate, making this portion thinner than the rest of the base plate, leaving space for the sealing ring and base plate. Then, when the power battery is in a high-frequency vibration environment for a long time, the force on the pole of the battery top cover will be transferred to the substrate, causing the weakest part of the substrate, that is, the part where the substrate and the pole fit together, to produce convex or concave deformation, thereby shortening the battery life.

[0040] In this regard, Figures 1 to 3 As shown, one embodiment of the present application provides a battery top cover structure 10. The battery top cover structure 10 can be applied to a power battery. Specifically, it can be installed on the top of the battery casing to encapsulate the battery cells within the battery casing. The power battery can be a lithium battery, of course, it can also be other batteries, such as lithium cobalt oxide batteries, nickel metal hydride batteries, etc.

[0041] like Figures 1 to 3 As shown, the battery top cover structure 10 includes a substrate 100, a terminal 200, an upper plastic part 300 and a lower plastic part 400; the substrate 100 serves as a supporting component of the entire battery top cover structure 10 and is installed on the top of the battery casing to encapsulate the battery cell in the battery casing, wherein, as shown in FIG. Figure 2 As shown, the substrate 100 has a first mounting hole 110 for the pole 200 to pass through. The first mounting hole 110 passes through the top and bottom surfaces of the substrate 100 along the thickness direction of the substrate 100. It should be noted that the thickness direction of the substrate 100 is Figure 2 The direction of the X-axis is shown.

[0042] The pole 200 extends from the first mounting hole 110 and is used to connect with the terminal to connect the battery cell to the external circuit. Figure 2 There are two poles 200, one of which is a positive pole 200 and the other is a negative pole 200. Correspondingly, two first mounting holes 110 are provided on the substrate 100, one of which is used for the positive pole 200 to pass through, and the other is used for the negative pole 200 to pass through.

[0043] The lower plastic part 400 is mainly used to separate the substrate 100 and the core, so as to play an insulating role between the substrate 100 and the battery core. Figure 4 As shown, the pole 200 pushes the lower plastic part 400 so that the lower plastic part 400 is close to the bottom surface of the substrate 100. As an example, Figure 4 As shown, a bottom plate 210 is provided at the bottom of the pole 200 , and the bottom plate 210 is used to push the lower plastic part 400 .

[0044] The lower plastic part 400 is also provided with a second mounting hole 410 for the electrode to pass through. The second mounting hole 410 passes through the top and bottom surfaces of the lower plastic part 400 along the thickness direction of the lower plastic part 400. It is understood that two second mounting holes 410 are also provided, one of which is for the positive electrode post 200 to pass through, and the other second mounting hole 410 is for the negative electrode post 200 to pass through.

[0045] Alternatively, as Figure 4 As shown, the inner wall of the second mounting hole 410 is provided with a step surface 411 , and the step surface 411 is used for the bottom plate 210 to press against.

[0046] The upper plastic part 300 can be formed on the top surface of the substrate 100 by injection molding and wrap the pole 200, so as to seal above the pole 200 and prevent external impurities from entering the battery. Figure 2 and Figure 4 As shown, a sealing ring 220 is provided on the outer circumference of the electrode 200. The sealing ring 220 is used to seal the gap between the electrode 200 and the substrate 100. The sealing ring 220 further ensures the airtightness of the battery. The number of upper plastic parts 300 can be set to two, one of which seals above the positive electrode 200 and the other seals above the negative electrode 200.

[0047] Optionally, one of the outer circumference of the pole 200 and the inner circumference of the upper plastic part 300 is provided with a slot 200a, and the other is provided with a clamping platform 310, which is accommodated in the slot 200a. By cooperating with the clamping platform 310 and the slot 200a, the injection molding area of ​​the upper plastic part 300 and the pole 200 can be increased, and the bonding strength between the pole 200 and the upper plastic part 300 can be improved. As an example, Figure 4 As shown, a clamping groove 200 a is provided on the outer circumference of the pole 200 , and a clamping platform 310 is provided on the inner circumference of the upper plastic part 300 , and the clamping platform 310 is accommodated in the clamping groove 200 a .

[0048] like Figure 5 and Figure 6As shown, a knurled boss 120 is provided on the top surface of the base plate 100 and is positioned around the outer periphery of the first mounting hole 110. The upper molded part 300, the knurled boss 120, and the base plate 100 are integrally injection-molded together and cover the outer periphery of the terminal 200. The knurled boss 120 is provided with multiple knurled teeth along its circumference, which increases the contact area between the upper molded part 300 and the knurled boss 120, ensuring a tight connection between the upper molded part 300 and the knurled boss 120, thereby providing the terminal 200 with a certain degree of pressure and torsion resistance.

[0049] From the above analysis, it can be seen that the portion of the substrate 100 close to the first mounting hole 110 (i.e., the portion where the knurled boss 120 is mounted, the weak portion of the substrate 100) not only cooperates with the terminal 200, but also cooperates with the sealing ring 220 and the bottom plate 210, which makes the thickness h of this portion smaller than the thickness H of other portions of the substrate 100 (see Figure 4 ), in order to reserve a certain space for accommodating the sealing ring 220 and the bottom plate 210, which also causes the strength of this part to be lower than the strength of other parts of the substrate 100. Figure 6 As shown, in this application, the top surface of the substrate 100 is further provided with reinforcing ribs 130, which are connected to the inner wall of the knurled boss 120. The provision of reinforcing ribs 130 increases the thrust and tensile resistance of weak parts of the substrate 100, improves the deformation capacity of weak parts of the substrate 100, and can extend the service life of the power battery. It can also increase the contact area between the upper molded part 300 and the substrate 100, improve the bonding stability of the upper molded part 300 and the substrate 100, strengthen the connection strength between the upper molded part 300 and the substrate 100, and improve the overall structural strength of the battery top cover, thereby improving the reliability of the battery. Optionally, the reinforcing ribs 130 are integrally formed with the substrate 100 and the knurled boss 120 by injection molding to ensure the connection strength between the three.

[0050] It can be seen that the battery top cover structure 10 of the present application can increase the thrust and tensile resistance of the weak parts of the substrate 100 and improve the deformation ability of the weak parts of the substrate 100 by providing the knurled boss 120 and the reinforcing rib 130 on the substrate 100 that cooperate with the upper plastic part 300, and can also increase the contact area between the upper plastic part 300 and the substrate 100, improve the connection stability between the upper plastic part 300 and the substrate 100, and can also improve the anti-pressure and anti-torsion capabilities of the pole 200.

[0051] In some embodiments of the present application, Figure 6As shown, the inner wall of the knurled boss 120 has a crest 121 and a trough 122. The crest 121 is close to the central axis of the first mounting hole 110, and the reinforcing rib 130 extends from the trough 122 toward the central axis of the first mounting hole 110. The inner wall of the knurled boss 120 can be considered a wavy inner wall, that is, the inner wall of the knurled boss 120 is alternately provided with multiple crests 121 and troughs 122 along the circumferential direction. The crests 121 are close to the central axis of the first mounting hole 110, and the troughs 122 are away from the central axis of the first mounting hole 110. Extending the reinforcing rib 130 from the trough 122 toward the central axis of the first mounting hole 110 can increase the length of the reinforcing rib 130, effectively improving the deformation capacity of the weak parts of the substrate 100.

[0052] Alternatively, as Figure 5 As shown, the reinforcing rib 130 has a first surface 131 close to the central axis of the first mounting hole 110, and the first surface 131 is flush with the inner wall of the first mounting hole 110. This configuration can maximize the length of the reinforcing rib 130, effectively improving the deformation capacity of the weak parts of the substrate 100, and also allow the reinforcing rib 130 to avoid the insertion of the pole 200.

[0053] Optionally, the number of troughs 122 is set to n, and the number of reinforcing ribs 130 is set to x, where 2 ≤ x ≤ n. It should be noted that both x and n are positive integers. The number of reinforcing ribs 130 can be adjusted accordingly based on needs. Preferably, the reinforcing ribs 130 are evenly distributed along the circumference of the first mounting hole 110 to ensure uniform deformation of weak areas of the substrate 100.

[0054] Alternatively, as Figure 6 As shown, the circumferential width of the trough 122 is W0, and the circumferential width of the reinforcing rib 130 is W1, then 0<W1≤W0. When there are many reinforcing ribs 130, the circumferential width W1 of the reinforcing rib 130 can be relatively small; when there are few reinforcing ribs 130, the circumferential width W1 of the reinforcing rib 130 can be relatively large. The specific circumferential width of the reinforcing rib 130 can be set accordingly as long as it effectively improves the deformation capacity of the weak parts of the substrate 100.

[0055] like Figure 6 As shown, in some embodiments of the present application, the top surface of the reinforcing rib 130 is lower than the top surface of the knurled boss 120. This arrangement creates a certain space on the top of the knurled boss 120, which can accommodate a portion of the upper molded part 300. This increases the contact area between the upper molded part 300 and the knurled boss 120, thereby improving the connection strength between the upper molded part 300 and the knurled boss 120.

[0056] The height of the reinforcing rib 130 can be set accordingly according to needs, as long as it can effectively improve the deformation resistance of the substrate 100. For example, if the height of the knurled boss 120 is 0.5 mm, the height of the reinforcing rib 130 can be set to 0.3 mm.

[0057] like Figure 6 As shown, in some embodiments of the present application, the width of the reinforcing rib 130 is along the direction from the top surface to the bottom surface of the substrate 100 (ie Figure 2 The reinforcing rib 130 of this structure not only facilitates supporting the upper molded part 300, but also, through its narrow upper portion and wide lower portion, provides sufficient space above the reinforcing rib 130 to accommodate a portion of the upper molded part 300. This increases the contact area between the upper molded part 300 and the knurled boss 120, thereby improving the connection strength between the upper molded part 300 and the knurled boss 120, and also increases the contact area between the upper molded part 300 and the reinforcing rib 130, thereby improving the connection strength between the upper molded part 300 and the reinforcing rib 130. Optionally, the longitudinal cross-section of the reinforcing rib 130 may be generally trapezoidal.

[0058] like Figure 2 As shown, in some embodiments, the substrate 100 has an explosion-proof opening 140, and the lower plastic part 400 has an explosion-proof cavity 420 corresponding to the explosion-proof opening 140 and sunken; Figure 1 As shown, the battery top cover structure 10 further includes an explosion-proof valve 500, which is disposed at the explosion-proof opening 140. The explosion-proof valve 500 can be used for circuit breaker protection or pressure relief protection. For example, when the internal pressure of the power battery increases and exceeds the opening pressure of the explosion-proof valve 500, the explosion-proof valve 500 opens to relieve pressure.

[0059] Alternatively, as Figure 2 As shown, the explosion-proof valve 500 includes a protective patch 510 and an aluminum sheet 520 stacked from top to bottom. The aluminum sheet 520 can withstand pressure. The protective patch 510 can preferably be made of PET material. The protective patch 510 is tough and will first swell when impacted and finally release pressure.

[0060] Optionally, the explosion-proof opening 140 is disposed in the middle of the two first mounting holes 110 , and the explosion-proof cavity 420 is disposed in the middle of the two second mounting holes 410 .

[0061] In another aspect, an embodiment of the present application further provides a power battery comprising a housing, a battery cell, and a battery top cover structure 10 as described above. The battery cell is disposed within the housing, and the battery top cover structure 10 is mounted on top of the housing and connected to the battery cell. Optionally, the terminal 200 of the battery top cover structure 10 is connected to the battery cell using a metal connector to transmit current.

[0062] The power battery can be a lithium battery, a lithium cobalt oxide battery, a nickel-metal hydride battery, or other batteries, and can be applied to electric vehicles (such as heavy trucks and mining trucks), energy storage systems, and other fields. The power battery can be a prismatic battery, or other shapes.

[0063] This power battery, by providing a knurled boss 120 and a reinforcing rib 130 on the substrate 100 of the battery top cover structure 10 to cooperate with the upper plastic part 300, can increase the thrust and tensile resistance of the weak parts of the substrate 100, improve the deformation capacity of the weak parts of the substrate 100, increase the contact area between the upper plastic part 300 and the substrate 100, improve the connection stability between the upper plastic part 300 and the substrate 100, and also improve the anti-pressure and anti-torsion capabilities of the terminal 200.

[0064] The technical features of the above-mentioned embodiments can be combined arbitrarily. In order to make the description concise, not all possible combinations of the technical features in the above-mentioned embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0065] The above-described embodiments merely represent several implementation methods of the present application. While the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent application. It should be noted that a person of ordinary skill in the art may make various modifications and improvements without departing from the spirit of the present application, and these modifications and improvements fall within the scope of protection of the present application. Therefore, the scope of protection of the present patent application shall be determined by the appended claims.

Claims

1. A battery top cover structure, characterized in that: It includes a substrate, which has a first mounting hole for a pole to pass through, the first mounting hole passes through the top and bottom surfaces of the substrate along the thickness direction of the substrate, and a knurled boss and a reinforcing rib are provided on the top surface of the substrate, the knurled boss is provided on the outer periphery of the first mounting hole, and the reinforcing rib is connected to the inner wall of the knurled boss.

2. The battery top cover structure according to claim 1, characterized in that: The inner wall of the knurled boss has a crest portion and a trough portion, the crest portion is close to the central axis of the first mounting hole, and the reinforcing rib extends from the trough portion toward the central axis of the first mounting hole.

3. The battery top cover structure according to claim 2, characterized in that: The reinforcing rib has a first surface close to the central axis of the first mounting hole, and the first surface is flush with the inner wall of the first mounting hole.

4. The battery top cover structure according to claim 2, characterized in that: The circumferential width of the trough portion is W0, and the circumferential width of the reinforcing rib is W1, then 0<W1≤W0.

5. The battery top cover structure according to claim 2, characterized in that: The number of the troughs is set to n, and the number of the reinforcing ribs is set to x, then 2≤x≤n.

6. The battery top cover structure according to claim 1, characterized in that: The top surface of the reinforcing rib is lower than the top surface of the knurled boss.

7. The battery top cover structure according to claim 1, characterized in that: The width of the reinforcing rib gradually increases along the direction from the top surface to the bottom surface of the substrate.

8. The battery top cover structure according to any one of claims 1 to 7, characterized in that: The battery top cover structure also includes a pole, an upper plastic part and a lower plastic part; The pole extends from the first mounting hole and pushes the lower plastic part so that the lower plastic part is close to the bottom surface of the substrate; The upper plastic part is integrally formed by injection molding with the knurled boss and the base plate, and covers the outer peripheral surface of the pole.

9. The battery top cover structure according to claim 8, characterized in that: One of the outer circumferential surface of the pole and the inner circumferential surface of the upper plastic part is provided with a card slot, and the other is provided with a card platform, and the card platform is accommodated in the card slot.

10. A power battery, characterized in that: Comprising a shell, a battery cell and a battery top cover structure according to any one of claims 1 to 9; The battery core is arranged in the shell, and the battery top cover structure is installed on the top of the shell and connected to the battery core.

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