CN215731930U - Power battery top cap and power battery - Google Patents

Abstract

The application provides a power battery top cap and power battery, be equipped with through-hole and locating part on the lower insulating part of power battery top cap, be equipped with fixed orifices and spacing hole on the pin, in the first direction, the fixed orifices, the aperture of through-hole suits with the external diameter of utmost point post, the first aperture in spacing hole suits with the external diameter of locating part, so that at least part utmost point post passes the through-hole and sets up in the fixed orifices, at least part locating part sets up in spacing downthehole, thereby utmost point post and locating part can restrict the pin jointly and remove along first direction, utmost point post and locating part also can bear the vibrational force and the impact force that the pin received jointly, the stability of pin is better, the pin has better resistant vibration and impact resistance.

Description

Power battery top cap and power battery

Technical Field

The application relates to processing equipment in the battery field, in particular to a power battery top cover and a power battery.

Background

With the increasingly prominent environmental problems, low-carbon economy has become the mainstream of future economic development. The new energy also gradually replaces the traditional environmental pollution type energy, and the power battery is gradually accepted by mass manufacturers and consumers as a representative of the new energy. The power battery is used as a main power source of the new energy automobile and becomes one of the key parts of the electric automobile.

As a key component of the power battery, the top cover structure of the power battery has a significant influence on the energy density, the economy and the safety of the power battery. At present, the weak vibration resistance and impact resistance of a pin component of a power battery are bottlenecks in the industry, and the safety and reliability of the power battery are seriously influenced.

SUMMERY OF THE UTILITY MODEL

The embodiment of the application provides a power battery top cap and power battery, and this power battery top cap can improve the vibration resistance and the shock resistance ability of pin component.

In a first aspect, an embodiment of the present application provides a power battery top cover, which includes a top cover plate, a pole mounted on the top cover plate, a pin electrically connected to the pole, and a lower insulating member disposed between the top cover plate and the pin; be equipped with through-hole and locating part down on the insulating part, be equipped with fixed orifices and spacing hole on the pin, in the first direction, the aperture of fixed orifices the aperture of through-hole with the external diameter of utmost point post suits, the first aperture of spacing hole with the external diameter of locating part suits, so that at least part utmost point post passes the through-hole set up in the fixed orifices, at least part the locating part set up in spacing downthehole.

In some embodiments, the position-limiting member includes a body portion and a position-limiting portion, the body portion is connected to the lower insulating member, in the first direction, an outer diameter of the body portion is smaller than the first aperture, and a first outer diameter of the position-limiting portion is larger than the first aperture, so that a portion of the body portion is disposed in the position-limiting hole, and the position-limiting portion is disposed on a side of the position-limiting hole away from the top cover plate.

In some embodiments, the stop portion has a first configuration and a second configuration, the first outer diameter of the stop portion in the first configuration being less than the first aperture and the first outer diameter of the stop portion in the second configuration being greater than the first aperture.

In some embodiments, the position-limiting portion includes a plurality of position-limiting sub-portions connected to the body portion, the plurality of position-limiting sub-portions being spaced around a central axis of the position-limiting portion along a second direction, the second direction being perpendicular to the first direction; the distance between the limiting sub-portion in the first form and the central axis is smaller than the distance between the limiting sub-portion in the second form and the central axis.

In some embodiments, the lower insulating member includes a bottom plate and a sidewall, the through hole and the limiting member are disposed on the bottom plate, a fastening portion is disposed on the sidewall, and the pin is fastened to the fastening portion.

In some embodiments, the power battery top cover includes a plurality of the fastening portions, and the plurality of the fastening portions are disposed at intervals on the side wall.

In some embodiments, the lead includes a flat plate portion, a connecting portion, and a bent portion connected in sequence, the bent portion extends toward a direction away from the flat plate portion and the connecting portion, the flat plate portion includes a symmetry axis along a first direction, and the limiting hole is disposed on a side of the symmetry axis away from the bent portion.

In some embodiments, the pin includes a plurality of spacing holes arranged at intervals.

In some embodiments, the through hole and the limiting member are symmetrically disposed about the central axis of the lower insulating member along the first direction.

In a second aspect, an embodiment of the present application provides a power battery, including a power battery cell and a power battery cell top cap that are electrically connected, where the power battery cell top cap includes the power battery cell top cap as described above.

The application provides a power battery top cap and power battery, set up fixed orifices and spacing hole on the pin of power battery top cap, set up through-hole and locating part on the insulating part down, in the first direction, the aperture of fixed orifices suits with the external diameter of utmost point post, the first aperture in spacing hole suits with the external diameter of locating part, at least part utmost point post can set up in the fixed orifices, at least part locating part sets up in spacing downthehole, thereby, utmost point post can restrict the removal of pin along first direction, the locating part also can restrict the removal of pin along first direction. The power battery top cap of this application embodiment, utmost point post and locating part can restrict the pin jointly and remove along first direction, and utmost point post and locating part also can bear the vibrational force and the impact force that the pin received jointly to the stability of pin is better, and the pin has better resistant vibration and shock resistance.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings used in the description of the embodiments will be briefly introduced below. It is obvious that the drawings in the following description are only some embodiments of the application, and that for a person skilled in the art, other drawings can be derived from them without inventive effort.

Fig. 1 is a schematic structural diagram of a power battery provided in an embodiment of the present application.

Fig. 2 is a schematic structural diagram of a top cover of a power battery provided in an embodiment of the present application.

Fig. 3 is an exploded view of the top cover of the power battery shown in fig. 2.

Fig. 4 is a first structural schematic diagram of a lower insulating member according to an embodiment of the present application.

Fig. 5 is a schematic view of a first structure of a pin according to an embodiment of the present disclosure.

Fig. 6 is a schematic cross-sectional view of a top cover of a power battery according to an embodiment of the present disclosure.

Fig. 7 is a partially enlarged schematic view of the region a shown in fig. 6.

Fig. 8 is a second structural diagram of the lower insulating member according to the embodiment of the present application.

Fig. 9 is a cross-sectional view of a portion of the lower insulator and the lead shown in fig. 8.

Fig. 10 is a third structural diagram of a lower insulating member according to an embodiment of the present application.

Fig. 11 is a cross-sectional view of a portion of the lower insulator and lead shown in fig. 10.

Fig. 12 is a fourth structural diagram of a lower insulating member according to an embodiment of the present application.

Fig. 13 is a second cross-sectional view of a top cover of a power battery according to an embodiment of the present disclosure.

Fig. 14 is a partially enlarged view of the region B shown in fig. 13.

Fig. 15 is a schematic diagram of a second structure of a pin according to an embodiment of the present application.

Fig. 16 is a schematic view of a fifth structure of a lower insulating member according to an embodiment of the present application.

Description of reference numerals:

100. power battery 10, power battery top cover 20 and power battery cell

11. Top cover plate 12, first conductive unit 13 and liquid injection hole structure

14. Explosion-proof unit 15, second conductive unit 121, first riveting piece

122. A first upper insulator 123, a first lower insulator 124, a first seal ring

125. First utmost point post 126, first pin 151, second riveting piece

152. A second upper insulator 153, a second lower insulator 154, a second seal ring

155. A second pole 156, a second pin 1231, a first through hole

1232. A first limiting member 1233, a first bottom plate 1234, and a first sidewall

1235. First accommodating space 1236, first buckling part 1261 and first fixing hole

1262. First position limiting hole 1263, first flat plate portion 1264, first connecting portion

1265. First bent part 1266, first groove L1, first edge

L2, second side L3, third side L4, fourth side

a1, a first main body a2, a first stopper a21, and a first stopper sub-part

M0, symmetry axis M1, first central axis M2 and fifth central axis

M3, a third center axis H1, a first direction H2, and a second direction.

Detailed Description

The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to fig. 1 to 16 in the embodiments of the present application. It is to be understood that the embodiments described are only a few embodiments of the present application and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

Referring to fig. 1, fig. 1 is a schematic structural diagram of a power battery 100 according to an embodiment of the present disclosure. The power battery 100 includes a power battery top cover 10 and a power battery cell 20, the power battery cell 20 includes a first tab (not shown) and a second tab (not shown), and the power battery top cover 10 includes a first pin 126 and a second pin 156.

The first pin 126 may be electrically connected to a first tab, the second pin 156 may be electrically connected to a second tab, the first pin 126 and the first tab may transmit positive current, and the second pin 156 and the second tab may transmit negative current, so that the power battery top cover 10 and the power battery cell 20 may form a current transmission path, and the power battery 100 may supply power to the outside.

Referring to fig. 2 and fig. 3, fig. 2 is a schematic structural diagram of a power battery top cover 10 according to an embodiment of the present disclosure, and fig. 3 is an exploded schematic diagram of the power battery top cover 10 shown in fig. 2. The power battery top cover 10 comprises a top cover plate 11, a first conducting unit 12, a liquid injection hole structure 13, an explosion-proof unit 14 and a second conducting unit 15.

The top cover sheet 11 is used for carrying the first conductive unit 12, the liquid injection hole structure 13, the explosion-proof unit 14, the second conductive unit 15 and the like. The top cover sheet 11 may have a certain rigidity, for example, the top cover sheet 11 may be made of metal. The first and second conductive units 12 and 15 may be symmetrically disposed at both ends of the top cover sheet 11, and the liquid injection hole structure 13 is formed on the top cover sheet 11, through which electrolyte may be injected into the telecommunications. The explosion-proof unit 14 may open a valve when the power battery 100 is abused so that a large amount of gas generated from the power battery 100 may be transmitted to the atmosphere, whereby the safety of the battery may be secured.

The first conductive element 12 may transmit an electric current, such as a positive pole current. As shown in fig. 3, in the thickness direction of the power battery top cover 10, the first conductive unit 12 includes a first rivet block 121, a first upper insulator 122, a first lower insulator 123, a first sealing ring 124, a first pole 125 and a first pin 126, which are stacked.

The first riveting block 121 may be a conductive material, such as but not limited to a metal material. The first riveting block 121 and the first upper insulator 122 are disposed at one side of the top cover plate 11, and the first upper insulator 122 is located between the first riveting block 121 and the top cover plate 11. The first upper insulator 122 may be a non-conductive material, such as but not limited to a plastic material, and the first upper insulator 122 may isolate the first riveting block 121 from the top cover plate 11 to prevent the first riveting block 121 and the top cover plate 11 from making electrical contact to cause a short circuit.

The first lead 126 may be a conductive material, such as but not limited to a metal material. The first pins 126 and the first lower insulator 123 may be disposed on the other side of the top cover plate 11, and the first lower insulator 123 is located between the first pins 126 and the top cover plate 11. The first lower insulator 123 may be a non-conductive material, such as but not limited to a plastic material, and the first lower insulator 123 may isolate the first pin 126 from the top cover plate 11 to prevent the first pin 126 from making electrical contact with the top cover plate 11 to cause a short circuit.

First riveting piece 121, first last insulating part 122, top cover plate 11, first insulating part 123 down, all can the through-hole on the corresponding position on first pin 126, so that first utmost point post 125 can pass first riveting piece 121 in order, first last insulating part 122, top cover plate 11, first insulating part 123 down, the through-hole on the first pin 126, the one end of first utmost point post 125 can with first riveting piece 121 fixed connection, the other end of first utmost point post 125 can be connected with first pin 126, thereby, first riveting piece 121 accessible first utmost point post 125 is connected with first pin 126 electricity.

The sizes of the through holes on the first riveting block 121, the first upper insulator 122, the top cover plate 11, the first lower insulator 123 and the first pin 126 may be different or not completely the same, for example, the through holes disposed on the first upper insulator 122 and the first lower insulator 123 may be larger than those on other structures. The size of the through hole in the above structure is not limited in the embodiment of the present application, and it is within the scope of the embodiment of the present application as long as the first pole 125 can sequentially pass through the through hole in the above structure.

The first sealing ring 124 may be sleeved on an end of the first pole 125 close to the first pin 126, when the first pole 125, the first riveting block 121, the first upper insulator 122, the top cover 11, the first lower insulator 123, and the first pin 126 are assembled, at least a portion of the first sealing ring 124 may be located between the first lower insulator 123 and the first pin 126, and the first sealing ring 124 may prevent the electrolyte in the power battery cell 20 from leaking from the through holes of the first pin 126, the first lower insulator 123, the top cover 11, the first upper insulator 122, and the first riveting block 121.

The second conductive element 15 may transmit current, such as negative current. As shown in fig. 3, in the thickness direction of the top cover 10 of the power battery, the second conductive unit 15 includes a second rivet block 151, a second upper insulator 152, a second lower insulator 153, a second sealing ring 154, a second pole 155, and a second pin 156, which are stacked.

It is understood that the structure of the second riveting block 151 and the structure of the first riveting block 121 may be symmetrically arranged about the symmetry axis M0 of the power battery top cover 10, that is, they are mirror images, and the specific structure of the second riveting block 151 will not be described herein.

Similarly, the structure of the second upper insulating member 152 and the structure of the first upper insulating member 122, the structure of the second lower insulating member 153 and the structure of the first lower insulating member 123, the structure of the second sealing ring 154 and the structure of the first sealing ring 124, the structure of the second pole 155 and the structure of the first pole 125, and the structure of the second pin 156 and the structure of the first pin 126 may all be symmetrically disposed about the symmetry axis M0 of the power battery top cover 10, in other words, the structure of the entire second conductive unit 15 and the structure of the first conductive unit 12 may be symmetrically disposed about the symmetry axis M0, and both may be mirror images. The structures of the second upper insulating member 152, the second lower insulating member 153, the second sealing ring 154, the second pole column 155 and the second pin 156 can be referred to the structures of the first upper insulating member 122, the first lower insulating member 123, the first sealing ring 124, the first pole column 125 and the first pin 126, respectively, and are not described herein again.

Referring to fig. 4 and 5, fig. 4 is a first structural schematic diagram of a lower insulating member according to an embodiment of the present disclosure, and fig. 5 is a structural schematic diagram of a pin according to an embodiment of the present disclosure. The power battery top cap 10 of the embodiment of the application comprises a top cover plate 11, a pole column installed on the top cover plate 11, a pin electrically connected with the pole column, and a lower insulating part arranged between the top cover plate 11 and the pin. The following describes the present invention by taking the electrode post as the first electrode post 125, the pin as the first pin 126, and the lower insulator as the first lower insulator 123.

The lower insulating member, for example, the first lower insulating member 123 may have a first through hole 1231 and a first limiting member 1232, the first pin 126 may have a first fixing hole 1261 and a first limiting hole 1262, the first pole 125 may pass through the first through hole 1231 and the first fixing hole 1261 and be connected and fixed with the first pin 126, and the first limiting member 1232 may pass through the first limiting hole 1262 and be connected and fixed with the first pin 126.

As shown in fig. 4, the first lower insulator 123 may further include a first bottom plate 1233 and a first sidewall 1234, the first sidewall 1234 may be connected to at least a portion of a periphery of the first bottom plate 1233 and the first sidewall 1234 may extend toward a side where the first leads 126 are located, so that the first sidewall 1234 and the first bottom plate 1233 may form a first accommodating space 1235, at least a portion of the first leads 126 may be disposed in the first accommodating space 1235, and the first lower insulator 123 may cover a portion of the first leads 126 that can contact the top cover 11 to isolate the first leads 126 from the top cover 11.

It is to be understood that first sidewall 1234 is attached to all of the perimeter of first bottom panel 1233 in fig. 4, and in practice may be attached to a portion of the perimeter of first bottom panel 1233 as desired. The embodiment of the present application does not limit the specific connection relationship between first bottom plate 1233 and first sidewall 1234.

It is understood that the first through hole 1231 may be disposed on the first bottom plate 1233, the first through hole 1231 may penetrate through the thickness direction of the first lower insulating member 123, and the first pole post 125 may penetrate through the first through hole 1231.

It is understood that the first limiting member 1232 may be disposed and connected to a surface of the first base plate 1233 facing the first leads 126, and the first limiting member 1232 may protrude from the first base plate 1233 toward the direction of the first leads 126. At least a portion of the first retention element 1232 is insertable into the first retention hole 1262 of the first pin 126.

It is understood that the number of the first position-limiting members 1232 can be one or more, and correspondingly, the number of the first position-limiting holes 1262 can also be one or more, for example, fig. 4 includes two first position-limiting members 1232, and fig. 5 includes two first position-limiting holes 1262. The number of the first limiting members 1232 and the first limiting members 1232 is not limited in the embodiment of the present application.

As shown in fig. 5, the first pin 126 may include a first flat plate portion 1263, a first connecting portion 1264, and a first bent portion 1265, which are connected in sequence. The thickness of the first flat plate portion 1263 may be equal to the thickness of the first connecting portion 1264, the first bent portion 1265 may be connected to the first connecting portion 1264 and extend in a direction away from the first flat plate portion 1263 and the first connecting portion 1264, and the first bent portion 1265 may extend in a direction toward the power battery cell 20 and be electrically connected to a first tab of the power battery cell 20.

The first flat plate part 1263 may include first and second oppositely disposed sides L1 and L2, and the first connecting part 1264 may include third and fourth oppositely disposed sides L3 and L4. The first side L1, the second side L2, the third side L3, and the fourth side L4 may be disposed along a first direction H1, the first direction H1 may be a direction of a length of the first lead 126, and the first direction H1 may be parallel to a direction of a length of the top cover sheet 11. The first side L1 may be flush with the third side L3, the second side L2 may not be flush with the fourth side L4, and a first distance D1 between the fourth side L4 and the third side L3 is smaller than a second distance D2 between the second side L2 and the first side L1, so that the width of the first connecting portion 1264 is smaller than the width of the first flat plate portion 1263, a first groove 1266 may be formed between the first connecting portion 1264 and the first flat plate portion 1263, the first bending portion 1265 may be connected to the fourth side L4, at least a portion of the first bending portion 1265 may be disposed in the first groove 1266, and the first groove 1266 may provide an avoiding space for the bending structure of the first bending portion 1265.

As shown in fig. 5, the first fixing holes 1261 and the first position-limiting holes 1262 may be disposed through the thickness direction of the first leads 126, and the first fixing holes 1261 may be disposed on the first flat plate portion 1263 due to the large area of the first flat plate portion 1263. The first stopper hole 1262 may be provided in the first flat plate portion 1263, or may be provided in the first connecting portion 1264, and the position where the first stopper hole 1262 is provided is not limited in the embodiment of the present application.

Referring to fig. 6 and 7 in conjunction with fig. 4 and 5, fig. 6 is a first schematic cross-sectional view of a top cover 10 of a power battery according to an embodiment of the present disclosure, and fig. 7 is a partially enlarged view of a region a shown in fig. 6. The first fixing hole 1261 may be coaxially disposed with the first through hole 1231 of the first lower insulator 123, and the aperture of the first fixing hole 1261 along the first direction H1 and the aperture of the first through hole 1231 along the first direction H1 may be adapted to the outer diameter of the first pole post 125 along the first direction H1, so that at least a portion of the first pole post 125 passes through the first through hole 1231 and is disposed in the first fixing hole 1261.

It is understood that the aperture of the first fixing hole 1261 along the first direction H1 may be slightly larger than the outer diameter of the first pole post 125 along the first direction H1, so that the first pole post 125 may be just limited in the first fixing hole 1261. After the first post 125 is retained in the first retaining hole 1261, the hole wall of the first retaining hole 1261 can limit the movement of the first post 125 along the first direction H1, and the first post 125 can also limit the movement of the first pin 126 along the first direction H1, so as to enhance the vibration and impact resistance of the first pin 126.

It is understood that the aperture of the first through hole 1231 along the first direction H1 may be slightly larger or larger than the outer diameter of the first pole post 125 along the first direction H1, the size of the aperture of the first through hole 1231 is not limited in the embodiment of the present application, and the aperture of the first through hole 1231 through which the first pole post 125 can pass is within the protection scope of the embodiment of the present application.

As shown in fig. 6 and 7, a first aperture of the first limiting hole 1262 along the first direction H1 is matched with an outer diameter of the first limiting member 1232 along the first direction H1, so that at least a part of the first limiting member 1232 can be disposed in the first limiting hole 1262.

It is understood that the first aperture of the first limiting hole 1262 along the first direction H1 may be slightly larger than the outer diameter of the first limiting member 1232 along the first direction H1, so that the first limiting member 1232 can be just limited in the first limiting hole 1262. After the first position-limiting member 1232 is positioned in the first position-limiting hole 1262, the hole wall of the first position-limiting hole 1262 can limit the movement of the first position-limiting member 1232 along the first direction H1, and the first position-limiting member 1232 can also limit the movement of the first pin 126 along the first direction H1, so as to enhance the vibration resistance and impact resistance of the first pin 126.

It can be understood that the first aperture of the first limiting hole 1262 can be adaptively set according to the outer diameter of the first limiting member 1232, the first limiting member 1232 is thicker, the first aperture is larger, the first limiting member 1232 is thinner, and the first aperture is smaller. The dimensions of the first position-limiting member 1232 and the first position-limiting hole 1262 are not particularly limited in the embodiment of the present invention.

In the power battery top cap 10 of the embodiment of the application, the first pin 126 is provided with the first fixing hole 1261 and the first limiting hole 1262, the first lower insulating member 123 is provided with the first through hole 1231 and the first limiting member 1232, the aperture of the first fixing hole 1261 along the first direction H1 is adapted to the outer diameter of the first pole 125 along the first direction H1, the first aperture of the first limiting hole 1262 along the first direction H1 is adapted to the outer diameter of the first limiting member 1232 along the first direction H1, at least a portion of the first pole 125 can be disposed in the first fixing hole 1261, and at least a portion of the first limiting member 1232 is disposed in the first limiting hole 1262, so that the first pole 125 can limit the movement of the first pin 126 along the first direction H1, and the first limiting member 1232 can also limit the movement of the first pin 126 along the first direction H1. In the power battery top cap 10 of the embodiment of the application, the first pole 125 and the first stopper 1232 can jointly limit the first pin 126 to move along the first direction H1, and the first pole 125 and the first stopper 1232 can also jointly bear the vibration force and the impact force applied to the first pin 126, so that the stability of the first pin 126 is better, and the first pin 126 has better vibration resistance and impact resistance.

It is understood that the second pin 156 of the second conductive unit 15 may be disposed like the first pin 126, and the second lower insulator 153 may be disposed like the first lower insulator 123.

For example, the second lower insulator 153 may include a second bottom plate (not shown) and a second sidewall (not shown), the second sidewall is connected to at least a portion of a periphery of the second bottom plate and extends toward a side where the second pins 156 are located, so that the second sidewall and the second bottom plate form a second receiving space (not shown) in which at least a portion of the second pins 156 are disposed. The second lead 156 includes a second flat plate portion (not shown), a second connecting portion (not shown), and a second bending portion (not shown), which are connected in sequence, the second flat plate portion includes a fifth side (not shown) and a sixth side (not shown) that are disposed opposite to each other, the second connecting portion includes a seventh side (not shown) and an eighth side (not shown) that are disposed opposite to each other, the fifth side and the seventh side are flush with each other, and a distance between the sixth side and the fifth side is greater than a distance between the eighth side and the seventh side. A second through hole (not shown) and a second limiting member (not shown) are formed in the second lower insulator 153, a second fixing hole (not shown) and a second limiting hole (not shown) are formed in the second pin 156, the diameter of the second fixing hole along the first direction H1 and the diameter of the second through hole along the first direction H1 are adapted to the outer diameter of the second pole 155 along the first direction H1, so that at least a part of the second pole 155 passes through the second through hole and is disposed in the second fixing hole; a second aperture of the second limiting hole along the first direction H1 is adapted to an outer diameter of the second limiting member along the first direction H1, so that at least a portion of the second limiting member is disposed in the second limiting hole.

It is understood that the specific structure and function of the sub-component of the second lower insulator 153 can be referred to the specific structure and function of the sub-component of the first lower insulator 123; the detailed structure and function of the sub-component of the second lead 156 can be referred to the detailed structure and function of the sub-component of the first lead 126, and will not be described in detail herein.

Referring to fig. 8 and 9, fig. 8 is a second structural diagram of a lower insulating member according to an embodiment of the present application, and fig. 9 is a cross-sectional diagram of a portion of the lower insulating member and a lead shown in fig. 8. The first stopper 1232 of the lower insulator such as the first lower insulator 123 may include a first body portion a1 and a first stopper portion a 2.

One end of the first body portion a1 may be fixedly connected to the first lower insulator 123. For example, the first body portion a1 may be connected to a side of the first bottom plate 1233 of the first lower insulator 123 near the first pin 126. The other end of the first body portion a1 may be connected to one end of the first position-limiting portion a2, and the other end of the first position-limiting portion a2 may be disposed at one side of the first position-limiting hole 1262 away from the top cover plate 11, so that the first body portion a1 and the first position-limiting portion a2 may be disposed at two sides of the first position-limiting hole 1262, respectively, and the first lower insulating member 123 may pass through and protrude out of the first position-limiting hole 1262.

It is understood that the outer diameter of the first body portion a1 along the first direction H1 may be smaller than the first aperture of the first limiting hole 1262 along the first direction H1, the outer diameter of the first limiting portion a2 along the first direction H1 may be larger than the first aperture of the first limiting hole 1262 along the first direction H1, so that the end of the first body portion a1 connected to the first limiting portion a2 may be limited in the first limiting hole 1262, and the first limiting portion a2 may be disposed outside the first limiting hole 1262.

It is understood that the first body portion a1 and the first stopper portion a2 may form a "mushroom" structure, and the first stopper portion a2 may be a "mushroom head" structure. The first position-limiting portion a2 can be formed by, but not limited to, a hot-melting process, for example, the first body portion a1 can protrude out of the first position-limiting hole 1262, and a portion of the first body portion a1 protruding out of the first position-limiting hole 1262 is formed into a first position-limiting portion a2 structure by the hot-melting process. The embodiment of the present application does not limit the formation manner of the first stopper portion a2 and the first body portion a 1.

In the power battery top cover 10 of the embodiment of the application, after the first position-limiting member 1232 is assembled with the first position-limiting hole 1262, the first body portion a1 is disposed on one side of the first position-limiting hole 1262, the first position-limiting portion a2 is disposed on the other side of the first position-limiting hole 1262, the outer diameter of the first position-limiting portion a2 along the first direction H1 is larger than the diameter of the first position-limiting hole 1262 along the first direction H1, and the first position-limiting portion a2 cannot pass through the first position-limiting hole 1262 and move up and down in the direction of the first connecting portion 1264 (i.e., the first position-limiting portion a2 cannot move in the second direction H2 different from the first direction H1, and the second direction H2 may be the depth direction of the first position-limiting hole 1262). At this time, the first lead 126 is restricted by the first stopper portion a2 and cannot move up and down in the depth direction of the first stopper hole 1262, i.e., the second direction H2, so that the first stopper 1232 is engaged with the first stopper hole 1262, thereby restricting the movement of the first lead 126 in the first direction H1 and the second direction H2, and further improving the vibration resistance and impact resistance of the first lead 126.

It is understood that the second limiting member can be disposed as the first limiting member 1232. For example, the second position limiting member may include a second main body portion (not shown) and a second position limiting portion (not shown) connected to each other, one end of the second main body portion is fixedly connected to the second lower insulating member 153, one end of the second position limiting portion is connected to the other end of the second main body portion, and the other end of the second position limiting portion is located on a side of the second pin 156 away from the top cover plate 11; the outer diameter of the second body portion along the first direction H1 is smaller than the second aperture, and the outer diameter of the second position-limiting portion along the first direction H1 is larger than the second aperture, so that part of the second body portion is disposed in the second through hole, and the second position-limiting portion is disposed outside the second position-limiting hole.

It is understood that the detailed structure and function of the sub-elements of the second position-limiting element can be referred to the detailed structure and function of the sub-elements of the first position-limiting element 1232, and will not be described in detail herein.

Referring to fig. 10 and 11, fig. 10 is a third structural diagram of a lower insulating element according to an embodiment of the present application, and fig. 11 is a cross-sectional diagram of a portion of the first lower insulating element and the pin shown in fig. 10. The first limiting portion a2 of the first limiting member 1232 of the lower insulator 123 may have at least two forms, such as a first form and a second form.

The outer diameter of the first position-limiting portion a2 in the first configuration may be smaller than the first aperture of the first position-limiting hole 1262, and the outer diameter of the first position-limiting portion a2 in the second configuration may be larger than the first aperture of the first position-limiting hole 1262. When the first position-limiting member 1232 is assembled with the first position-limiting hole 1262, the first body portion a1 and the first position-limiting portion a2 can move toward the first position-limiting hole 1262 along the second direction H2, the first position-limiting portion a2 is pressed by the hole wall of the first position-limiting hole 1262 in the process of being gradually inserted into the first position-limiting hole 1262, the first position-limiting portion a2 can be deformed and is in the first shape, and since the outer diameter of the first position-limiting portion a2 in the first shape is smaller than the first hole diameter of the first position-limiting hole 1262, the first position-limiting portion a2 can pass through the first position-limiting hole 1262. After the first position-limiting portion a2 passes through the first position-limiting hole 1262, the hole wall of the first position-limiting hole 1262 cannot limit the position of the first position-limiting portion a2, the first position-limiting portion a2 may not be in the second form, because the outer diameter of the first position-limiting portion a2 in the second form is greater than the first hole diameter of the first position-limiting hole 1262, the first position-limiting portion a2 cannot pass through the first position-limiting hole 1262 again, the first position-limiting hole 1262 can also limit the displacement of the first position-limiting portion a2 along the second direction H2, and the first position-limiting portion a2 can limit the movement of the first pin 126 along the second direction H2.

It is understood that the first position-limiting portion a2 may be made of an elastic material, so that the first position-limiting portion a2 may be pressed by the hole wall to deform. Of course, the first stopper portion a2 may have a different shape by special design.

For example, the first stopper portion a2 may include a plurality of first stopper sub-portions a21 connected to the first body portion a1, and a plurality of first stopper sub-portions a21 may be disposed around the first central axis M1 of the first stopper portion a2 in the second direction H2. The second direction H2 may be perpendicular to the first direction H1, for example, when the first direction H1 is a horizontal direction, the second direction H2 may be a vertical direction. It is understood that a plurality of the first limiting sub-portions a21 may be uniformly spaced on a circumference having the first central axis M1 as a symmetry axis, and adjacent two first limiting sub-portions a21 may have a gap therebetween.

The plurality of first limiting sub-portions a21 can move toward the first central axis M1, so that the first limiting portion a2 can have different shapes. For a first limiting sub-portion a21, the distance between the first limiting sub-portion a21 in the first form and the first central axis M1 may be smaller than the distance between the first limiting sub-portion a21 in the second form and the first central axis M1. Therefore, the first stopper portion a2 according to the embodiment of the present application can realize the interconversion between the first mode and the second mode.

It is understood that the first position-restricting sub-portion a21 of the embodiment of the present application may be a rigid material to increase the hardness of the first position-restricting portion a 2.

In the power battery top cover 10 of the embodiment of the application, the first stopper portion a2 includes a plurality of first stopper sub-portions a21 spaced around the first central axis M1, and since there is a gap between the plurality of first stopper sub-portions a21, the plurality of first stopper sub-portions a21 can be compressed to have the first form, and the plurality of first stopper sub-portions a21 have the second form when they are naturally spaced. The first limiting portion a2 of the embodiment of the present application may be made of a rigid material, so that the power battery top cover 10 of the embodiment of the present application may have a certain hardness while realizing the change of different forms, and the mechanical strength of the power battery top cover 10 may be improved.

The above is merely an illustrative example in which the first stopper portion a2 may have the first form and the second form, and the specific structure of the first stopper portion a2 is not limited thereto. Any solution that can make the first stopper portion a2 have the above two forms is within the protection scope of the embodiment of the present application.

It is understood that the second limiting member can be disposed as the first limiting member 1232. For example, the second position-limiting portion may have a third configuration and a fourth configuration, the outer diameter of the second position-limiting portion in the third configuration being smaller than the second aperture, and the outer diameter of the second position-limiting portion in the fourth configuration being larger than the second aperture. For another example, the second position-limiting portion may include a plurality of second position-limiting sub-portions connected to the second body portion, and the plurality of second position-limiting sub-portions are disposed around the second position-limiting portion at intervals along a second central axis (not shown) of the second direction H2; the distance between the second limiting sub-portion in the third form and the second central axis is smaller than the distance between the second limiting sub-portion in the fourth form and the second central axis.

It is understood that the detailed structure and function of the sub-elements of the second position-limiting element can be referred to the detailed structure and function of the sub-elements of the first position-limiting element 1232, and will not be described in detail herein.

Referring to fig. 12 to 14, fig. 12 is a fourth structural schematic diagram of a lower insulating member according to an embodiment of the present disclosure, fig. 13 is a second cross-sectional schematic diagram of a top cover 10 of a power battery according to an embodiment of the present disclosure, and fig. 14 is a partially enlarged schematic diagram of a region B shown in fig. 13. In order to further enhance the vibration resistance and shock resistance of the pins, such as the first pins 126, a first latching portion 1236 may be disposed on the first sidewall 1234 of the lower insulator of the top cover 10, such as the first lower insulator 123, and the first latching portion 1236 is located in a first accommodating space 1235 formed by the first sidewall 1234 and the first bottom plate 1233.

The first latching portion 1236 may extend from the first sidewall 1234 toward a direction away from the first sidewall 1234, and a receiving groove may be formed between the first latching portion 1236 and the first sidewall 1234, and when the first lower insulator 123 is assembled with the first pin 126, a portion of the first pin 126 may be disposed in the receiving groove. The first fastening portion 1236 includes a hook, which can hook the edge of the first pin 126, so that the first fastening portion 1236 can be fastened to the edge of the first pin 126.

It is understood that the number of the first latching portions 1236 may be multiple, and a plurality of the first latching portions 1236 may be spaced apart from each other on the first sidewall 1234.

In the power battery cell 20 of the embodiment of the present application, the first fastening portion 1236 disposed on the first lower insulating member 123 may be fastened to the first pin 126 and may limit the first pin 126 in the accommodating groove, and the first pin 126 is limited to be unable to move along the second direction H2, so as to further improve the vibration resistance and impact resistance of the first pin 126.

It is understood that the second lower insulator 153 may be disposed the same as the first lower insulator 123. For example, a second fastening portion (not shown) may be disposed on a second sidewall of the second lower insulator 153, the second fastening portion is disposed in the second accommodating space, and the second pin 156 is fastened to the second fastening portion. In another example, the number of the second fastening portions is multiple, and the multiple second fastening portions are arranged on the second side wall at intervals.

It is understood that the specific structure and function of the second latching portion can be seen from the above-mentioned first latching portion 1236, and will not be described in detail herein.

Please refer to fig. 15 in conjunction with fig. 2 and fig. 5, and fig. 15 is a schematic diagram of a second structure of a lead according to an embodiment of the present disclosure. To further enhance the structural strength of the leads, such as the first leads 126, the specific locations of the openings on the first leads 126 may be set.

For example, as shown in fig. 15, the first bent portion 1265 of the first lead 126 may be connected to the fourth side L4 of the first connecting portion 1264 and extend away from the fourth side L4. At this time, a distance from the center of the first position-limiting hole 1262 to the third edge L3 of the first lead 126 may be smaller than a distance from the center of the first position-limiting hole 1262 to the fourth edge L4 of the first lead 126, so that the first position-limiting hole 1262 is closer to the third edge L3 of the first lead 126 and further away from the fourth edge L4 of the first lead 126, and the first position-limiting hole 126 may be disposed away from the first bending portion 1265.

It is understood that when the first restraining hole 1262 is disposed away from the first bending portion 1265, the first flat plate portion 1263 may include a symmetry axis along the first direction H1, such as the fifth central axis M2, and the first restraining hole 1262 is disposed eccentrically with respect to the fifth central axis M2 of the first pin 126, i.e., the center of the first restraining hole 1262 is not located on the fifth central axis M2. The first limiting hole 1262 may be disposed on a side of the symmetry axis, such as the fifth central axis M2, away from the first bending portion 1265. It is understood that a plurality of first position-limiting members 1232 may be disposed on the first lower insulating member 123, and correspondingly, a plurality of first position-limiting holes 1262 may be disposed on the first pins 126. The plurality of first position-limiting holes 1262 may be disposed at intervals on the first flat plate portion 1263 and/or the first connecting portion 1264 of the first lead 126. The centers of the first limiting holes 1262 can be arranged in a collinear manner.

It is understood that, when the first position-limiting hole 1262 is eccentrically disposed on the first pin 126, correspondingly, referring to fig. 4, 8 and 10, the first position-limiting member 1232 may also be eccentrically disposed on the first lower insulating member 123, in this case, the first lower insulating member 123 is not in an axisymmetrical structure, and the structure of the first lower insulating member 123 after rotating 180 is different from the mirror image structure thereof (i.e., the structure of the second lower insulating member 153) along the second direction H2, so that the structure of the first lower insulating member 123 is different from the structure of the second lower insulating member 153. In actual processing, the first lower insulator 123 and the second lower insulator 153 may be separately prepared.

In the power battery top cap 10 of the embodiment of the present application, the first limiting hole 1262 of the first pin 126 is far away from the first bending portion 1265, and since the first bending portion 1265 can be welded with the first tab of the power battery electric core 20 in the processing process, and the like, the periphery of the first bending portion 1265 is easily affected by the welding stress, therefore, the first limiting hole 1262 of the embodiment of the present application is not easily affected by the first bending portion 1265, and the structural strength of the first pin 126 is better.

It is understood that the second pins 156 may be disposed the same as the first pins 126. For example, the distance from the center of the second position-limiting hole of the second lead 156 to the seventh side of the second lead 156 is smaller than the distance from the center of the second position-limiting hole to the eighth side of the second lead 156. As another example, the second lead 156 may include a plurality of second limiting holes arranged at intervals.

It is understood that the specific structure and function of the second leads 156 can be referred to the specific structure and function of the first leads 126, and will not be described in detail herein.

Please refer to fig. 16, wherein fig. 16 is a schematic diagram illustrating a fifth structure of a lower insulating member according to an embodiment of the present application. The lower insulating member, such as the first lower insulating member 123, may not be eccentrically disposed, that is, the first stoppers 1232 may be symmetrically disposed about the third central axis M3 of the first lower insulating member 123 in the first direction H1. At this time, the first through hole 1231 of the first lower insulator 123 may also be symmetrically disposed about the third central axis M3, so that the first lower insulator 123 may have an axisymmetrical pattern.

It is understood that the second through hole of the second lower insulator 153 may be symmetrically disposed about a fourth central axis (not shown) of the second lower insulator 153 along the first direction H1, and the second stopper of the second lower insulator may also be symmetrically disposed about the fourth central axis, so that the second lower insulator 153 may have an axisymmetrical pattern.

It is understood that the structure of the first lower insulator 123 after being mirrored along the symmetry axis M0 of the power cell 100 may be identical to the structure of the first lower insulator 123. The structure of the second lower insulator 153 after being mirrored along the axis of symmetry M0 may also be identical to the structure of the second lower insulator 153. Since the first lower insulator 123 is disposed in a mirror image with the second lower insulator 153 along the symmetry axis M0, the first lower insulator 123 and the second lower insulator 153 have the same structure.

According to the top cover 10 of the power battery, the first lower insulating part 123 and the second lower insulating part 153 are identical in structure, the first lower insulating part 123 and the second lower insulating part 153 can be produced by only opening a die in actual processing, the production process of the first lower insulating part 123 and the second lower insulating part 153 can be simplified, and the production cost is saved.

It should be noted that the terminal posts, the pins, and the lower insulating member described in some embodiments of the present application may be the first terminal post 125, the first pin 126, and the first lower insulating member 123 of the first conductive unit 12; accordingly, the features of the fixing hole, the through hole, the limiting member, the fastening portion, etc. described in these embodiments may be features on the first pole 125, the first pin 126, and the first lower insulator 123. Of course, there are other embodiments of the post, the pin, and the lower insulating member that are described in the embodiments, which may also be the second post 155, the second pin 156, and the second lower insulating member 153 of the second conductive unit 15, and correspondingly, other features that are described in these embodiments may also be structural features on the second post 155, the second pin 156, and the second lower insulating member 153. And will not be described in detail herein.

It is to be understood that, in the description of the present application, terms such as "first", "second", and the like are used merely to distinguish similar objects and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated.

The power battery top cover 10 and the power battery 100 provided in the embodiment of the present application are described in detail above. The principles and implementations of the present application are described herein using specific examples, which are presented only to aid in understanding the present application. Meanwhile, for those skilled in the art, according to the idea of the present application, there may be variations in the specific embodiments and the application scope, and in summary, the content of the present specification should not be construed as a limitation to the present application.

Claims (10)

1. A power battery top cover is characterized by comprising a top cover plate, a pole column arranged on the top cover plate, a pin electrically connected with the pole column, and a lower insulating part arranged between the top cover plate and the pin; be equipped with through-hole and locating part down on the insulating part, be equipped with fixed orifices and spacing hole on the pin, in the first direction, the aperture of fixed orifices the aperture of through-hole with the external diameter of utmost point post suits, the first aperture of spacing hole with the external diameter of locating part suits, so that at least part utmost point post passes the through-hole set up in the fixed orifices, at least part the locating part set up in spacing downthehole.

2. The top cap of claim 1, wherein the retaining member comprises a body portion and a retaining portion connected to each other, the body portion is connected to the lower insulator, and the body portion has an outer diameter smaller than the first aperture and the retaining portion has a first outer diameter larger than the first aperture in the first direction, such that a portion of the body portion is disposed in the retaining hole and the retaining portion is disposed on a side of the retaining hole away from the top cap.

3. The top cap of claim 2, wherein the retaining portion has a first configuration and a second configuration, the first outer diameter of the retaining portion in the first configuration being less than the first aperture, and the first outer diameter of the retaining portion in the second configuration being greater than the first aperture.

4. The power battery top cover according to claim 3, wherein the limiting portion comprises a plurality of limiting sub-portions connected to the body portion, the plurality of limiting sub-portions being spaced around a central axis of the limiting portion in a second direction, the second direction being perpendicular to the first direction; the distance between the limiting sub-portion in the first form and the central axis is smaller than the distance between the limiting sub-portion in the second form and the central axis.

5. The power battery top cover according to claim 1, wherein the lower insulating member comprises a bottom plate and a side wall, the through hole and the limiting member are arranged on the bottom plate, a buckling part is arranged on the side wall, and the pin is buckled with the buckling part.

6. The power battery top cover according to claim 5, wherein the power battery top cover comprises a plurality of buckling parts, and the plurality of buckling parts are arranged on the side wall at intervals.

7. The top cap of power battery according to any one of claims 1 to 6, wherein the pin includes a flat plate portion, a connecting portion and a bending portion connected in sequence, the bending portion extends toward a direction away from the flat plate portion and the connecting portion, the flat plate portion includes a symmetry axis along a first direction, and the limiting hole is disposed on a side of the symmetry axis away from the bending portion.

8. The power battery top cover of claim 7, wherein the pin comprises a plurality of spacing holes arranged at intervals.

9. The power battery top cover according to any one of claims 1 to 6, wherein the through hole and the retaining member are both symmetrically disposed about a central axis of the lower insulator along the first direction.

10. A power battery comprising electrically connected power battery cells and a power cell cap, the power battery cap comprising the power cell cap of any one of claims 1 to 9.

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