Cover assembly and battery

Abstract

Cover assembly comprising a cover, a battery terminal attached to the cover, and a connecting plate, the connecting plate comprising a battery terminal connection section and a terminal tab connection section, the battery terminal connection section and the terminal tab connection section being arranged at an angle to each other and connected to each other, the battery terminal connection section being connected to the battery terminal, and a first insulating element being arranged between the battery terminal connection section and the cover, the first insulating element being provided with a latching hook section with which the battery terminal connection section is in latching connection, and the battery terminal connection section having a break-resistant notch adjacent to the terminal tab connection section.

Description

Technical area

[0001] The present application relates to the field of batteries, for example to a cover assembly and a battery. Technical background

[0002] According to the prior art, a battery mainly comprises an enclosure and a battery cell arranged in the enclosure. The enclosure comprises a housing with an opening and a cover that covers the opening. The cover is provided with a battery terminal to which a terminal lug of the battery cell is electrically connected via an L-shaped connecting plate. The connecting plate is generally a plate-like structure produced by bending, which has a small thickness and low strength. However, batteries are susceptible to deformation and breakage due to mechanical vibrations and shocks during use. For example, when the battery is used in motor vehicles, the vibrations and shocks during driving can easily cause deformation or even breakage of the connecting plate at the location of the pins where stress concentration exists (e.g.,at the bending point of the connecting plate), which leads to battery failure. Disclosure of the invention

[0003] The present application provides a cover assembly that can improve the vibration and shock resistance of a connecting plate and reduce the risk of deformation or breakage of the connecting plate.

[0004] The present application provides a battery with a connecting plate that is not easily broken, has good usability and a long service life.

[0005] According to a first aspect, the embodiments of the present application provide a cover assembly comprising a cover, a battery post attached to the cover, and a connecting plate, which connecting plate comprises a battery post connecting portion and a terminal lug connecting portion which are arranged at an angle to one another and connected to one another, wherein the battery post connecting portion is connected to the battery post, and wherein a first insulating element is arranged between the battery post connecting portion and the cover, which is provided with a latching hook portion with which the battery post connecting portion is in latching connection, wherein a break-resistant notch is formed on the battery post connecting portion adjacent to the terminal lug connecting portion.

[0006] In one embodiment, the first insulating element is provided with a limiting portion that is matched to the outer contour of the shatter-proof notch and inserted into the shatter-proof notch.

[0007] In one embodiment, a transition section is provided between the terminal lug connecting section and the battery pole connecting section, wherein the length of the terminal lug connecting section in a first direction is greater than the length of the transition section in the first direction.

[0008] In one embodiment, the battery terminal connecting portion is provided with a battery terminal hole connected to the battery terminal, while the terminal tab connecting portion is provided with a protruding extension portion on its side facing away from the battery terminal hole in the first direction.

[0009] In one embodiment, the width of the transition section gradually increases from the end facing the battery terminal connecting section to the end facing the terminal tab connecting section.

[0010] In one embodiment, the terminal lug connecting portion is provided with a thinned portion in the vicinity of the battery post connecting portion, wherein the cross-sectional dimension of the thinned portion in a second direction is smaller than the cross-sectional dimension of the terminal lug connecting portion except for the thinned portion in the second direction.

[0011] In one embodiment, the first insulating element is provided with a recessed limiting groove on its side facing away from the cover, wherein the latching hook section is located at a point on the groove wall of the limiting groove adjacent to the groove opening, while the battery pole connecting section is arranged within the limiting groove and is in latching connection with the latching hook section, and / or wherein the limiting section is located at a point on the groove wall of the limiting groove adjacent to the groove opening and is inserted into the shatter-proof notch.

[0012] In one embodiment, one of the two elements, ie the first insulating element and the battery terminal connecting portion, is provided with a positioning hole and the other of the two elements, ie the first insulating element and the battery terminal connecting portion, is provided with a positioning pin, wherein the positioning pin is inserted into the positioning hole.

[0013] In one embodiment, it is provided that there is a distance L between the contact surface of the latching hook section on the battery pole connecting section and the plane in which the groove opening of the limiting groove of the first insulating element is located, while the battery pole connecting section has a thickness H, wherein LH > 0.1 mm, and / or that a side wall within the break-proof notch is arranged at a distance from the limiting section, wherein the gap between the limiting section and the side wall of the break-proof notch is greater than 0.1 mm.

[0014] In one embodiment, the terminal tab connecting portion comprises a first side surface and a second side surface that are opposite to each other in the first direction, and is provided with a slot that extends through the first side surface and the second side surface and is configured to insert into a terminal tab of a battery cell.

[0015] According to a second aspect, the embodiments of the present application provide a battery comprising a housing having an opening, a battery cell installed in the housing, and a cover assembly as described above, wherein the cover assembly covers the opening and is connected to a terminal tab of the battery cell via a terminal tab connecting portion of a connecting plate. The present application offers the following advantageous effects:

[0016] Before connecting the battery terminal to the connecting plate, the battery terminal connecting portion can be pre-fixed by the locking hook portion against the edge of the first insulating member to reduce the difficulty of welding the battery terminal and the battery terminal connecting portion. After the connection is established, the locking hook portion can also serve to restrict and support the connecting plate to prevent the connecting plate from moving vertically under the action of an external force, thereby improving the vibration and impact resistance of the connecting plate and making the connecting plate less susceptible to deformation.In addition, the anti-fracture notch arranged at the junction between the battery post connecting portion and the terminal lug connecting portion helps to relieve the stress at the junction between the battery post connecting portion and the terminal lug connecting portion and avoid stress concentration at the junction, thereby improving the tear strength of the junction and reducing the risk of junction breakage due to external force. Presentation of the illustrations Fig. 1 shows an exploded view of a cover assembly according to an embodiment of the present application. Fig. 2 shows the schematic structure of a cover assembly according to an embodiment of the present application. Fig. 3 shows a sectional view of a cover assembly according to an embodiment of the present application. Fig. 4 shows an enlarged view of area A in Fig. 3. Fig. 5 shows a connecting plate and a first insulating element according to an embodiment of the present application in a separated state. Fig. 6 shows a second side view of a first insulating element according to an embodiment of the present application. Fig. 7 shows a first side view of a first insulating element according to an embodiment of the present application. Fig. 8 shows the schematic structure of a battery according to an embodiment of the present application.

[0017] In the drawing: 1: Cover; 11: Third projection; 2: Battery post; 3: Connecting plate; 31: Battery post connecting portion; 32: Terminal lug connecting portion; 321: Thinned portion; 322: Extended portion; 323: First side surface; 324: Second side surface; 325: Slot; 33: Shatter-proof notch; 34: Transition portion; 4: First insulating member; 41: Snap hook portion; 42: Restricting portion; 43: Restricting groove; 44: Demolding hole; 45: First projection; 5: Locating hole; 6: Locating peg; 7: Second insulating member; 71: Second projection; 8: Fixing block; 9: Sealing ring; 100: Battery; 10: Case; 12: Battery cell; 13: Cover assembly. Concrete embodiments

[0018] In the description of the present application, it should be noted that the terms "connected to one another", "connect", and "fasten" are to be understood in a broad sense, unless expressly stated and defined otherwise. For example, this can refer to a fixed, detachable, or one-piece connection, as well as a mechanical or electrical connection. Furthermore, direct connections, indirect connections, or connections made via an intermediate piece, as well as internal connections between two elements, or an interactive relationship between two elements are also conceivable. Persons of ordinary skill in the art can use the facts of the case to determine the meaning of these terms in the context of the present application.

[0019] Out of Fig. 1 to 5 show a cover assembly according to the present application, which comprises a cover 1, a battery terminal 2, and a connecting plate 3. The battery terminal 2 is attached to the cover 1. The connecting plate 3 comprises a battery terminal connecting portion 31 and a terminal lug connecting portion 32, which are arranged at an angle to one another and connected to one another, wherein the battery terminal connecting portion 31 is connected to the battery terminal 2. Between the battery terminal connecting portion 31 and the cover 1, a first insulating element 4 is arranged, which is provided with a latching hook portion 41, with which the battery terminal connecting portion 31 is in latching connection. A shatter-proof notch 33 adjacent to the terminal lug connecting portion 32 is formed on the battery terminal connecting portion 31.

[0020] It is understood that the cover 1, the first insulating element 4, and the connecting plate 3 are arranged from top to bottom. The battery terminal 2 is passed through the cover 1 and the first insulating element 4 and welded to the battery terminal connecting portion 31 of the connecting plate 3. Before welding, the battery terminal connecting portion 31 can engage the edge of the first insulating element 4 by means of the locking hook portion 41 and thus be pre-fixed in order to reduce the difficulties in welding the battery terminal 2 and the battery terminal connecting portion 31.After welding, the locking hook portion 41 can also perform the function of restricting and supporting the connecting plate 3 to prevent the connecting plate 3 from moving in the vertical direction under the action of an external force, thereby improving the shock and vibration resistance of the connecting plate 3 and making the connecting plate 3 less susceptible to deformation. Furthermore, the anti-fracture notch 33 provided at the junction between the battery post connecting portion 31 and the terminal lug connecting portion 32 helps relieve stress at the junction between the battery post connecting portion 31 and the terminal lug connecting portion 32 and prevent stress concentration at the junction, thereby improving the tear resistance of the junction and reducing the risk of rupture of the junction due to an external force.

[0021] The number of the locking hook section 41 can be one or more than one and is not expressly limited here.

[0022] The presence of the break-resistant notch 33 provides space for the terminal lug connecting portion 32 to deform or wobble, but easily causes the terminal lug connecting portion 32 to deform or wobble more when subjected to an external force in the direction of the break-resistant notch 33, which may cause the terminal lug connecting portion 32 to break. To address this problem, the first insulating member 4 is provided with a restricting portion 42 that conforms to the outer contour of the break-resistant notch 33 and is inserted into the break-resistant notch 33. When the battery terminal connecting portion 31 is mounted on the first insulating member 4, the restricting portion 42 can be inserted into the break-resistant notch 33 to block and restrict the terminal lug connecting portion 32, thus reducing the amount of deformation of the terminal lug connecting portion 32.This makes the connecting tab connecting section 32 less susceptible to deformation, so that the risk of deformation and breakage of the connecting plate 3 is further reduced.

[0023] The fracture-resistant notch 33 may be a V-shaped notch, a U-shaped notch, a rectangular notch, an arcuate notch, or a notch of other shapes. In the present embodiment, the fracture-resistant notch 33 is a V-shaped notch, which can contribute to increasing the radius of curvature of the junction between the terminal lug connecting portion 32 and the battery post connecting portion 31, thereby effectively relieving the stresses accumulated during shock and vibration.

[0024] A gap is provided between the limiting portion 42 and the break-resistant notch 33 to provide a certain amount of space for the deformation of the terminal lug connecting portion 32. It is understood that the terminal lug connecting portion 32 is susceptible to fracture if severely deformed. However, if the movement of the terminal lug connecting portion 32 is completely restricted, this can cause stress concentration at the junction between the battery terminal connecting portion 31 and the terminal lug connecting portion 32 and a consequent over-stiffening of the connecting plate 3, which would also lead to fracture of the connecting plate 3. By providing a gap between the limiting portion 42 and the break-resistant notch 33, it is now possible to reserve space for the elastic deformation of the terminal lug connecting portion 32 in order to relieve stress.In addition, it is possible to block and restrict the terminal lug connecting portion 32 by the restricting portion 42 to prevent the terminal lug connecting portion 32 from deforming to an excessive extent and thereby breaking.

[0025] In this case, a gap that is too small between the limiting portion 42 and the break-resistant notch 33 can easily lead to insufficient deformation margin for the terminal lug connecting portion 32, which would result in excessive rigidity of the connecting plate 3. If the gap between the limiting portion 42 and the break-resistant notch 33 is too large, excessive deformation and consequent breakage of the terminal lug connecting portion 32 can easily occur. Optionally, the gap between the limiting portion 42 and the side wall of the break-resistant notch 33 is greater than 0.1 mm. Optionally, the gap between the limiting portion 42 and the side wall of the break-resistant notch 33 is 0.1 mm, 0.15 mm, 0.2 mm, 0.25 mm, 0.3 mm, etc.

[0026] Optionally, an elastic intermediate piece (not shown) is provided in the gap between the limiting section 42 and the break-proof notch 33, so that the connecting tab connecting section 32 rests elastically against the limiting section 42 in order to cushion any possible breakage of the connecting tab connecting section 32, whereby the connecting plate 3 is less susceptible to breakage.

[0027] The first insulating member 4 is provided with a recessed limiting groove 43 on its side facing away from the cover 1, wherein the locking hook portion 41 is located at a position on the groove wall of the limiting groove 43 adjacent to the groove opening. The battery terminal connecting portion 31 is arranged within the limiting groove 43 and is in locking connection with the locking hook portion 41 to prevent the battery terminal connecting portion 31 from falling out. This construction accommodates the battery terminal connecting portion 31 through the limiting groove 43 to limit the rotation of the battery terminal connecting portion 31 in the circumferential direction of the battery terminal 2, and at the same time, limits the movement of the battery terminal connecting portion 31 in the vertical direction through the locking hook portion 41, thus limiting the connecting plate 3 as a whole and thereby becoming more stable and reliable.

[0028] In order to facilitate the assembly of the battery pole connecting section 31 in the limiting groove 43 and its locking with the latching hook section 41, there is a distance L between the contact surface of the latching hook section 41 on the battery pole connecting section 31 and the plane in which the groove opening of the limiting groove 43 of the first insulating element 4 is located, while the battery pole connecting section 31 has a thickness H, where L is greater than H.

[0029] If LH is too large, the volume of the first insulating member 4 increases, increasing the space occupied by the battery case. Conversely, if LH is too small, the assembly of the connecting plate 3 and the first insulating member 4 becomes more difficult. Optionally, LH is greater than 0.1 mm. Optionally, LH is 0.1 mm, 0.15 mm, 0.2 mm, 0.25 mm, 0.3 mm, etc.

[0030] The groove wall of the limiting groove 43 is provided with a limiting portion 42 adjacent to the groove opening, which is located on the first insulating element 4 at a location associated with the break-resistant notch 33 and is inserted into the break-resistant notch 33. The cooperation between the limiting portion 42 and the break-resistant notch 33 can not only prevent deformation and breakage of the connecting plate 3, but also play a role in positioning and assembling the connecting plate 3 and the first insulating element 4.

[0031] Optionally, the cross-sectional dimension of the limiting groove 43 is larger than the cross-sectional dimension of the battery terminal connecting portion 31 so that the battery terminal connecting portion 31 fits into the limiting groove 43 with clearance, which facilitates the installation of the battery terminal connecting portion 31 into the limiting groove 43.

[0032] Furthermore, the battery terminal connecting portion 31 is provided with a battery terminal hole, the first insulating member 4 is provided with a first opening, and the cover 1 is provided with a second opening. The battery terminal 2 is inserted into the battery terminal hole with one end through the first opening and the second opening and welded to the battery terminal hole. The terminal lug connecting portion 32 is connected to an edge region of the battery terminal connecting portion 31 facing away from the battery terminal hole to increase the distance between the terminal lug connecting portion 32 and the battery terminal hole, thereby dampening the impact and torsional force acting on the junction between the battery terminal connecting portion 31 and the terminal lug connecting portion 32 and further improving the impact and vibration resistance of the junction.

[0033] Optionally, one of the two elements, ie the first insulating element 4 and the battery terminal connecting portion 31, is provided with a positioning hole 5 and the other of the two elements, ie the first insulating element 4 and the battery terminal connecting portion 31, is provided with a positioning pin 6, wherein the positioning pin 6 is inserted into the positioning hole 5. By way of example, as in Fig. 1, Fig. 2 and Fig. 5, the groove bottom of the limiting groove 43 is provided with a protruding positioning pin 6, and the battery terminal connecting portion 31 is provided with a positioning hole 5. The positioning pin 6 is inserted into the positioning hole 5 to position and assemble the battery terminal connecting portion 31 and to ensure that the battery terminal hole on the battery terminal connecting portion 31 is aligned with the first opening and the second opening. Furthermore, the insertion fit between the positioning pin 6 and the positioning hole 5 can limit the movement of the connecting plate 3 in the horizontal direction, which contributes to improving the shock and vibration resistance of the connecting plate 3.

[0034] Optionally, the cover 1 is provided with a first recess, and the first insulating element 4 is provided with a first projection 45, wherein the first recess and the first projection 45 fit into each other by inserting them to prevent rotation of the first insulating element 4 and the cover 1 relative to each other. In other embodiments, it is also possible for the cover 1 to be provided with a projection and the first insulating element 4 with a recess to achieve a plug-in fit between the projection and the recess.

[0035] Optionally, the connecting plate 3 can be made from an integral sheet and bent to form a battery terminal connecting portion 31 and a terminal lug connecting portion 32 in order to increase the overall strength of the connecting plate 3.

[0036] Optionally, a transition section 34 is provided between the terminal lug connecting section 32 and the battery terminal connecting section 31, wherein the length of the terminal lug connecting section 32 in a first direction (x-direction in the drawing) is greater than the length of the transition section 34 in the first direction. This construction allows the area of ​​the terminal lug connecting section 32 and thus the welding area of ​​the terminal lug connecting section 32 and the terminal lug to be increased, which contributes to improving the welding effect of the terminal lug connecting section 32 and the terminal lug and thereby increasing the stability of the connection between the terminal lug connecting section 32 and the terminal lug. Furthermore, the length of the transition section 34 in the first direction is relatively short, i.e.the connecting surface between the transition section 34 and the battery pole connecting section 31 is small, which makes it easier for the transition section 34 to deform elastically under external force in order to reduce stresses and thus avoid stress concentration at the bending point of the connecting plate 3.

[0037] For example, the terminal lug connecting portion 32 is provided with a protruding extension portion 322 on its side facing away from the battery terminal hole in the first direction, wherein the first direction is the same as the direction in which the terminal lug protrudes from the battery cell. Since the battery terminal connecting portion 31 is mounted within the delimiting groove 43 of the first insulating element 4, it can naturally occur that the terminal lug connecting portion 32 interferes with the groove wall of the delimiting groove 43 facing away from the battery terminal hole if the terminal lug connecting portion 32 is configured to protrude from this groove wall of the delimiting groove 43.This design, by providing the extension section 322, makes it possible to widen the terminal lug connecting section 32 in the extension direction of the terminal lug, so that the length of the terminal lug connecting section 32 in the first direction is greater than the length of the transition section 34 in the first direction, thereby increasing the welding area of ​​the terminal lug connecting section 32. At the same time, it is possible to form the connecting plate 3 with a notch in the region of the transition section 34, which allows bypassing of the first insulating element 4 in order to be able to arrange the terminal lug connecting section 32 below the limiting groove 43 at a distance therefrom, so that the widened terminal lug connecting section 32 can be connected to the terminal lug without hindrance.

[0038] Optionally, the limiting groove 43 has an outer groove wall facing away from the battery terminal hole in the first direction, wherein a side surface of the extension section 322 facing away from the battery terminal hole in the first direction is flush with the outer groove wall. If the length of the extension section 322 in the first direction is too large, the space occupied by the connecting plate 3 in the battery housing increases, which reduces the energy density of the battery. On the other hand, an excessively short length of the extension section 322 in the first direction would reduce the welding effect of the terminal lug connecting section 32 and the terminal lug.This design improves the space utilization within the battery case by utilizing the space already existing in the battery case below the outer groove wall to widen the extension section 322, eliminating the need to widen the connecting plate 3 by reducing the size of the battery cell. This makes it possible to improve the welding of the connecting plate 3 to the terminal lug without compromising the density of the battery.

[0039] Optionally, the terminal lug connecting portion 32 includes a first side surface 323 and a second side surface 324 that oppose each other in the first direction, and is provided with a slot 325 that extends through the first side surface 323 and the second side surface 324 and serves to insert the terminal lug. With this construction, the terminal lug can be first inserted into the slot 325 for pre-fixation and then welded and fixed so that the two side surfaces of the slot 325 can abut and be welded to the two side surfaces of the terminal lug in a second direction (y direction in the drawing), which further increases the connection area between the terminal lug connecting portion 32 and the terminal lug to achieve better welding of the terminal lug connecting portion 32 to the terminal lug and establish a more stable connection.

[0040] Optionally, the width of the transition section 34 increases, as shown in Fig. 6, gradually from the end facing the battery terminal connecting portion 31 to the end facing the terminal lug connecting portion 32. This design allows the stress existing at the bending point of the connecting plate 3 to change gradually across the transition portion 34 and be transferred to the terminal lug connecting portion 32, preventing damage caused by sudden stress changes.

[0041] Optional is, as in Fig. 7, the terminal lug connecting portion 32 is provided with a thinned portion 321 near the battery post connecting portion 31, wherein the cross-sectional dimension of the thinned portion 321 in the second direction is smaller than the cross-sectional dimension of the terminal lug connecting portion 32 except for the thinned portion 321 in the second direction. In the present embodiment, the thinned portion 321 has a smaller thickness than the terminal lug connecting portion 32. When the connecting plate 3 is subjected to an external force, the thinner thinned portion 321 is more likely to undergo flexible deformation to prevent the connecting plate 3 from breaking due to excessive external force. At the same time, the thinned portion 321 has greater resistance and can serve as a fuse structure for overcurrent protection to prevent thermal runaway of the battery.

[0042] The first insulating element 4 can be a one-piece, injection-molded plastic part. The first insulating element 4 is provided with a demolding hole 44 at a location opposite the locking hook portion 41. It is known that inserts are used in injection molding to simplify molding. Inserts are irregular mold accessories that are inserted into the mold to fill the space between the templates. During injection molding, a demolding hole 44 is formed so that the insert can pass through the demolding hole 44. That is, the insert can partially fill the interior of the mold to facilitate the shaping of the locking hook portion 41 and partially be arranged outside the mold so that after injection molding is completed, the insert can be quickly pulled out through the demolding hole 44 for easy demolding.

[0043] The cover assembly further comprises a second insulating element 7, which is arranged on the side of the cover 1 facing away from the first insulating element 4, wherein a fastening block 8 is provided on the side of the second insulating element 7 facing away from the cover 1. Furthermore, the second insulating element 7 is provided with a third opening, and the fastening block 8 is provided with a rivet hole, wherein the battery terminal 2, with its end facing away from the connecting plate 3, is passed in sequence through the first opening, the second opening, and the third opening and riveted to the rivet hole.

[0044] Optional is, as in Fig. 1, Fig. 3 and Fig. 4, the second insulating element 7 is provided with a second projection 71 and the fastening block 8 is provided with a second recess, wherein the second recess and the second projection 71 fit into each other by insertion in order to prevent rotation of the second insulating element 7 and the fastening block 8 relative to each other and thereby improve the stability of the battery terminal 2.

[0045] In addition, the cover 1 is provided with a third projection 11 and the second insulating element 7 is provided with a third recess, wherein the third recess and the third projection 11 fit into each other by inserting them in order to prevent rotation of the second insulating element 7 and the cover 1 relative to each other and thus further increase the stability of the battery terminal 2.

[0046] With reference to the Fig. 1 and Fig. 4, the cover assembly further comprises a sealing ring 9 which surrounds the outer periphery of the battery terminal 2, fills the gap between the third opening and the battery terminal 2 and is arranged between the underside of the cover 1 and a shoulder on the outer periphery of the battery terminal 2 to ensure the tightness of the cover assembly.

[0047] As in Fig.8, the present application also provides a battery 100 comprising a housing 10 having an opening, a battery cell 12 installed in the housing, and a cover assembly 13 according to any one of the above-described embodiments, wherein the cover assembly covers the opening and is connected to a terminal tab of the battery cell via the terminal tab connecting portion 32 of the connecting plate 3. By using the cover assembly according to any one of the above-described embodiments for the battery of the present application, the battery is less likely to fail due to deformation and breakage of the connecting plate 3, and rather, improved usability and a longer battery life are achieved.

[0048] In this specification, the terms "top," "bottom," "left," "right," and the like are used as orientation or positional designations, each with reference to the illustration in the respective figure. They are used solely for ease of description and convenience of operation and are not intended to indicate or imply that the device or element referred to has a particular orientation or must be constructed and operated in a particular orientation, and are therefore not to be construed as limiting the present application. Furthermore, the terms "first" and "second" are used solely for differentiation in the specification and have no particular meaning.

[0049] Throughout this specification, the use of the terms "an embodiment," "an example," etc., indicates that features, structures, materials, or special features described with reference to that embodiment or example are included in at least one embodiment or example of the present application. These terms, when used demonstratively in this specification, do not necessarily refer to one and the same embodiment or example.

[0050] Furthermore, it should be understood that although the present description is presented using embodiments, not each of these embodiments contains a single independent technical solution. The description is presented this way only for the sake of clarity, while those skilled in the art should consider the description as a whole. The technical solutions in various embodiments can also be combined as appropriate to develop further embodiments that can be understood by those skilled in the art.

Claims

[1] Cover assembly comprising a cover, a battery post attached to the cover, and a connecting plate, wherein the connecting plate comprises a battery post connecting portion and a terminal lug connecting portion, wherein the battery post connecting portion and the terminal lug connecting portion are arranged at an angle to one another and are connected to one another, wherein the battery post connecting portion is connected to the battery post, and wherein a first insulating element is arranged between the battery post connecting portion and the cover, wherein the first insulating element is provided with a latching hook portion with which the battery post connecting portion is in latching connection, wherein a break-proof notch is formed on the battery post connecting portion adjacent to the terminal lug connecting portion. [2] The cover assembly according to claim 1, wherein the first insulating member is provided with a limiting portion, the limiting portion being matched to the outer contour of the shatter-proof notch and inserted into the shatter-proof notch. [3] The cover assembly according to claim 1 or 2, wherein a transition portion is provided between the terminal lug connecting portion and the battery post connecting portion, the length of the terminal lug connecting portion in a first direction being greater than the length of the transition portion in the first direction. [4] The cover assembly according to claim 3, wherein the battery terminal connecting portion is provided with a battery terminal hole, the battery terminal hole being connected to the battery terminal, the terminal tab connecting portion being provided with a protruding extension portion on its side facing away from the battery terminal hole in the first direction. [5] The cover assembly according to claim 3 or 4, wherein the width of the transition portion gradually increases from the end facing the battery post connecting portion to the end facing the terminal tab connecting portion. [6] The cover assembly according to any one of claims 1-5, wherein the terminal lug connecting portion is provided with a thinned portion in the vicinity of the battery post connecting portion, the cross-sectional dimension of the thinned portion in a second direction being smaller than the cross-sectional dimension of the terminal lug connecting portion except for the thinned portion in the second direction. [7] Cover assembly according to one of claims 2-6, wherein the first insulating element is provided with a recessed limiting groove on its side facing away from the cover, wherein the latching hook section is located at a location on the groove wall of the limiting groove adjacent to the groove opening, wherein the battery terminal connecting section is arranged within the limiting groove and is in latching connection with the latching hook section, and / or wherein the limiting section is located at a location on the groove wall of the limiting groove adjacent to the groove opening and is inserted into the shatter-proof notch. [8] The cover assembly according to any one of claims 1-7, wherein one of the first insulating member and the battery terminal connecting portion is provided with a positioning hole, and the other of the first insulating member and the battery terminal connecting portion is provided with a positioning pin, the positioning pin being inserted into the positioning hole. [9] Cover assembly according to one of claims 2-8, wherein there is a distance L between the contact surface of the latching hook portion on the battery terminal connecting portion and the plane in which the groove opening of the limiting groove of the first insulating element is located, wherein the battery terminal connecting portion has a thickness H, wherein LH > 0.1 mm, and / or wherein a side wall within the break-proof notch is arranged at a distance from the limiting portion, wherein the gap between the limiting portion and the side wall within the break-proof notch is greater than 0.1 mm. [10] The cover assembly according to any one of claims 1-9, wherein the terminal tab connecting portion comprises a first side surface and a second side surface and is provided with a slot, the first side surface and the second side surface being opposite each other in the first direction, and the slot extending through the first side surface and the second side surface and being adapted for insertion fitting with a terminal tab of a battery cell. [11] A battery comprising a housing having an opening, a battery cell installed in the housing, and a cover assembly according to any one of claims 1-10, wherein the cover assembly covers the opening and is connected to a terminal lug of the battery cell via a terminal lug connecting portion of a connecting plate.

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