CN116706456A

CN116706456A - Lower plastic part, end cover assembly, energy storage device and electric equipment

Info

Publication number: CN116706456A
Application number: CN202310981046.5A
Authority: CN
Inventors: 陈志雄
Original assignee: Shenzhen Haichen Energy Storage Control Technology Co ltd; Xiamen Hithium Energy Storage Technology Co Ltd
Current assignee: Shenzhen Haichen Energy Storage Technology Co ltd; Xiamen Hithium Energy Storage Technology Co Ltd
Priority date: 2023-08-07
Filing date: 2023-08-07
Publication date: 2023-09-05
Anticipated expiration: 2043-08-07
Also published as: CN116706456B

Abstract

The invention discloses a lower plastic part, an end cover assembly, an energy storage device and electric equipment, wherein the lower plastic part comprises a first split part, an explosion-proof valve fence block and a second split part, the first split part is provided with a first pole hole and a first open slot communicated with the first pole hole, the second split part is provided with a second pole hole and a second open slot communicated with the second pole hole, the explosion-proof valve fence block is provided with a first clamping support and a second clamping support, the first clamping support is embedded into the first open slot, the second clamping support is embedded into the second open slot, the first split part can slide relative to the explosion-proof valve fence block along a first direction so as to separate the first open slot from the first clamping support, and the second split part can slide relative to the explosion-proof valve fence block along a direction opposite to the first direction so as to separate the second open slot from the second clamping support. By adopting the technical scheme, the recycling of the lower plastic part can be realized on the premise of not damaging the original structure of the lower plastic part, and the environment pollution caused by dust generated in the recycling process is avoided.

Description

Lower plastic part, end cover assembly, energy storage device and electric equipment

Technical Field

The invention relates to the technical field of energy storage, in particular to a lower plastic part, an end cover assembly, an energy storage device and electric equipment.

Background

With the continuous development of new energy industry, more and more batteries are scrapped, and a large number of wasted batteries cause waste of resource energy and environmental pollution, for example, the wasted lithium batteries contain a large number of available resources, such as valuable metals of aluminum, copper and the like, graphite, carbon-based materials and the like; if the waste lithium batteries are disposed of improperly, great waste of resources and environmental pollution will be caused.

In the related art, the recycling of the battery is generally performed by pulverizing and decomposing the battery by mechanical pressure and then separating the active material, the foil and the case by incineration or chemical means. However, the recycling method of the battery can crush and destroy structural members, so that the recycling rate of the structural members is low, and a large amount of dust is generated in the crushing process, thereby polluting the environment.

Disclosure of Invention

The embodiment of the invention discloses a lower plastic part, an end cover assembly, an energy storage device and electric equipment, which can realize recycling of the lower plastic part on the premise of not damaging the original structure of the lower plastic part and avoid the condition of polluting the environment due to dust generated in the recycling process.

In order to achieve the above object, in a first aspect, the present invention discloses a lower plastic part including a first split part, an explosion-proof valve fence block, and a second split part assembled in sequence along a length direction, the length direction including opposite first and second directions, the first split part having a first side facing the explosion-proof valve fence block, the second split part having a second side facing the explosion-proof valve fence block, the explosion-proof valve fence block having a third side facing the first split part and a fourth side facing the second split part;

The first split piece is provided with a first pole hole and a first open slot communicated with the first pole hole, and the opening of the first open slot is positioned on the first side face;

the second split piece is provided with a second pole hole and a second open slot communicated with the second pole hole, and the opening of the second open slot is positioned on the second side surface;

the third side of the explosion-proof valve fence block is provided with a first clamping support, the fourth side is provided with a second clamping support, the first clamping support is detachably embedded into the first open slot, and the second clamping support is detachably embedded into the second open slot.

According to the lower plastic part, the first split part, the explosion-proof valve fence block and the second split part are arranged in a split mode, the first split part is provided with the first open slot, the third side face of the explosion-proof valve fence block is provided with the first clamping support, the first open slot is communicated with the first pole hole and the first side face, which penetrates through the first split part, of the first split part and faces the explosion-proof valve fence block, so that the first clamping support can be embedded into the first open slot, connection between the first split part and the explosion-proof valve fence block is achieved, meanwhile, sliding of the first split part in the first direction is not limited by the first pole, the first split part can slide relative to the explosion-proof valve fence block in the first direction, the first open slot is separated from the first clamping support, and splitting of the first split part and the explosion-proof valve fence block is achieved; similarly, a second open slot is formed in the second split piece, a second clamping support is arranged on the fourth side face of the explosion-proof valve fence block, the second open slot is communicated with the second pole hole and penetrates through the second side face of the second split piece, which faces the explosion-proof valve fence block, so that the second clamping support can be embedded into the second open slot, connection between the second split piece and the explosion-proof valve fence block is achieved, meanwhile, sliding of the second split piece in the second direction cannot be limited by the second pole, and then the second split piece can slide along the second direction relative to the explosion-proof valve fence block, so that the second open slot and the second clamping support are separated, and separation of the first split piece and the explosion-proof valve fence block is achieved.

Therefore, when the lower plastic part provided by the application is used for recycling the battery, the two split parts of the lower plastic part can slide along two opposite directions, so that the first open slot is separated from the first clamping support, the second open slot is separated from the second clamping support, the two split parts can be detached from the explosion-proof valve fence block, and then the explosion-proof valve fence block is taken down from the end cover plate, so that the lower plastic part is recycled, and the situation that dust is generated in the recycling process to pollute the environment can be avoided on the premise that the original structure of the lower plastic part is not damaged.

As an alternative implementation manner, in an embodiment of the first aspect of the present application, one of the first side surface and the third side surface is provided with a first clamping groove, the other of the first side surface and the third side surface is provided with a first clamping protrusion, the first clamping protrusion and the first clamping groove are in a snap connection, one of the second side surface and the fourth side surface is provided with a second clamping groove, and the other of the second side surface and the fourth side surface is provided with a second clamping protrusion, and the second clamping protrusion and the second clamping groove are in a snap connection.

Through increasing first draw-in groove and first card convex part for not only can be connected through first open slot and first card support between first components of a whole that can function independently spare and the explosion-proof valve fence piece, still can be connected through first draw-in groove and first card convex part realization, thereby can make the connection between first components of a whole that can function independently spare and the explosion-proof valve fence piece more stable, and then can effectively avoid leading to the circumstances of first components of a whole that can function independently spare and explosion-proof valve fence piece separation when the cooperation structure of first open slot and first card support appears becoming flexible. And through increasing second draw-in groove and second card convex part for not only can be connected through second open slot and second card support realization between second components of a whole that can function independently spare and the explosion-proof valve fence piece, still can be connected through second draw-in groove and second card convex part realization, thereby can make the connection between second components of a whole that can function independently spare and the explosion-proof valve fence piece more stable, and then can effectively avoid leading to the circumstances of second components of a whole that can function independently spare and explosion-proof valve fence piece separation when the cooperation structure that holds in the palm because of second open slot and second card appears becoming flexible.

As an alternative implementation manner, in an example of the first aspect of the present invention, the first split piece has a first surface and a second surface opposite to each other in a thickness direction, the explosion-proof valve fence piece has a third surface and a fourth surface opposite to each other in the thickness direction, the second split piece has a fifth surface and a sixth surface opposite to each other in the thickness direction, and the first surface, the third surface and the fifth surface are located on the same side of the lower plastic piece in the thickness direction; the first clamping groove penetrates through the first surface or the third surface, the first clamping groove is provided with a first groove wall surface which faces the same as the third surface, the first groove wall surface is provided with a first inserting hole, the lower plastic part further comprises a first bolt part, and when the first clamping convex part is embedded into the first clamping groove, the first bolt part penetrates through the first inserting hole and is connected with the first clamping convex part; the second clamping groove penetrates through the fifth surface or the third surface, the second clamping groove is provided with a second groove wall surface which faces the same as the third surface, a second inserting hole is formed in the second groove wall surface, the lower plastic part further comprises a second bolt part, and the second bolt part penetrates through the second inserting hole and is connected to the second clamping convex part.

Through increasing first latch spare and first jack, can make the connection of first draw-in groove and first card convex part more stable to be favorable to further improving the connection reliability between first components of a whole that can function independently spare and the explosion-proof valve fence piece. And through increasing second latch spare and second jack, can make the connection of second draw-in groove and second card convex part more stable to be favorable to further improving the connection reliability between second components of a whole that can function independently and the explosion-proof valve fence piece.

As an alternative implementation manner, in an embodiment of the first aspect of the present invention, the first jack penetrates through the second surface or the fourth surface, the first plug member includes a first main body portion and a first head portion with a radial dimension larger than that of the first main body portion, the first main body portion penetrates through the first jack and is connected to the first clamping protrusion, the first head portion is connected to the first main body portion and is located outside the first jack, and the first head portion is abutted against the second surface of the first split member or the fourth surface of the explosion-proof valve fence block; when the lower plastic part is applied to the end cover assembly of the energy storage device, the first head part is abutted against the second surface of the first split part along the thickness direction and facing the electrode assembly, or the explosion-proof valve fence block is abutted against the fourth surface of the electrode assembly along the thickness direction, so that the first head part is utilized to be matched with the first split part or the explosion-proof valve fence block to limit the first main body part, the first main body part can be firmly penetrated into the first jack, and the situation that the first main body part is loosened slightly to be separated from the first jack is avoided; and meanwhile, the first head can be used for stopping the lug of the limiting electrode assembly, so that the lug is prevented from shielding the explosion-proof valve fence block, and gas in the shell of the energy storage device can pass through the explosion-proof valve fence block and be discharged to the explosion-proof valve for pressure relief and explosion prevention, and the pressure relief effect of the explosion-proof valve is ensured.

The second insertion hole penetrates through the sixth surface or the fourth surface, the second plug pin piece comprises a second main body portion and a second head portion with a radial size larger than that of the second main body portion, the second main body portion penetrates through the second insertion hole and is connected to the second clamping protruding portion, the second head portion is connected to the second main body portion and is located outside the second insertion hole, and the second head portion is abutted to the sixth surface of the second split piece or the fourth surface of the explosion-proof valve fence block. When the lower plastic part is applied to the end cover assembly of the energy storage device, the second head part is abutted against the sixth surface of the second split part along the thickness direction and facing the electrode assembly, or the explosion-proof valve fence block is abutted against the fourth surface of the electrode assembly along the thickness direction, so that the second head part is utilized to be matched with the second split part or the explosion-proof valve fence block to limit the second main body part, the second main body part can be firmly penetrated into the second jack, and the situation that the second main body part is easy to loosen and can be separated from the second jack is avoided; and meanwhile, the second head can be used for stopping the lug of the limiting electrode assembly, so that the lug is prevented from shielding the explosion-proof valve fence block, and gas in the shell of the energy storage device can pass through the explosion-proof valve fence block and be discharged to the explosion-proof valve for pressure relief and explosion prevention, and the pressure relief effect of the explosion-proof valve is ensured.

As an alternative implementation manner, in an embodiment of the first aspect of the present invention, an inner wall of the first jack includes a continuous plurality of first elastic teeth, and the first main body portion of the first latch member is penetrating through the first jack and abuts against the first elastic teeth; by the design, the first main body part and the first jack of the first latch component are in interference fit, the connection between the first main body part and the first jack is more stable, the first elastic tooth part is elastic and can be elastically deformed, the first latch component is conveniently pulled out, and the first split component is convenient to detach quickly.

In some optional embodiments, the first head portion abuts against the plurality of first elastic tooth portions, and because the first elastic tooth portions have elasticity, elastic deformation can occur, even if the length of the first main body portion in the thickness direction of the lower plastic part is shorter than the length of the preset length due to processing errors, elastic deformation can occur by utilizing the first head portion to abut against the first elastic tooth portions, so that the length errors of the first main body portion in the thickness direction of the lower plastic part can be compensated, the first main body portion can be penetrated into the first central hole in an interference mode, the first head portion abuts against the plurality of first elastic tooth portions, and assembly of the first latch part and the first jack is completed, so that assembly precision between the first latch part and the first jack can be reduced.

As an alternative implementation manner, in an embodiment of the first aspect of the present invention, an inner wall of the second jack includes a plurality of continuous second elastic teeth portions, and the second body portion of the second latch member is disposed through the second jack and abuts against the second elastic teeth portions. By the design, the second main body part and the second jack of the second latch component are in interference fit, so that the connection between the second main body part and the second jack is more stable, the second elastic tooth part is elastic and can be elastically deformed, the second latch component can be conveniently pulled out, and the second split component can be conveniently and rapidly detached.

In some optional embodiments, the second head portion abuts against the plurality of second elastic tooth portions, and because the second elastic tooth portions have elasticity, elastic deformation can occur, even if the length of the second main body portion in the thickness direction of the lower plastic part is shorter than the length of the preset length due to processing errors, the second head portion abuts against and presses the second elastic tooth portions to elastically deform, so as to compensate the length errors of the second main body portion in the thickness direction of the lower plastic part, so that the second main body portion can be penetrated into the second central hole in an interference manner, and the second head portion abuts against the plurality of second elastic tooth portions, so that assembly of the second latch part and the second jack is completed, and assembly precision between the second latch part and the second jack can be reduced.

As an alternative implementation manner, in an embodiment of the first aspect of the present invention, the second surface of the first split piece is provided with a first boss, along the length direction, the first boss is located at an end of the first split piece away from the explosion-proof valve fence block, and in the protruding direction of the first boss, a surface of the first boss, which faces away from the first split piece, is higher than a surface of the first head, which faces away from the first main body; the sixth surface of second components of a whole that can function independently is equipped with the second boss, the second boss is located the second components of a whole that can function independently keep away from the one end of explosion-proof valve fence piece, and in the protruding direction of second boss, a surface of second boss keep away from the second components of a whole that can function independently is higher than a surface of first head keep away from second main part.

When the energy storage device shakes, the electrode assembly is usually contacted and abutted with the first boss and the second boss, and is stopped and limited by the first boss and the second boss, so that the electrode assembly is prevented from poking the first latch piece and the second latch piece when the energy storage device shakes, the connection of the first latch piece and the first jack is loose, the connection of the second latch piece and the second jack is loose, the connection stability between the first clamping groove and the first clamping convex part is improved, the connection stability between the second clamping groove and the second clamping convex part is improved, and the connection reliability of the first split piece and the explosion-proof valve fence block and the connection reliability of the second split piece and the explosion-proof valve fence block are ensured. In addition, the first boss and the second boss can play a role in strengthening the strength of the first split piece and the second split piece, and meanwhile, the hot melting area of the mayar protective film can be increased.

As an optional implementation manner, in an embodiment of the first aspect of the present invention, the first card slots are an even number, and every two first card slots in the even number of first card slots are symmetrically arranged with respect to the first card holder; the first clamping grooves with even numbers are arranged, so that the connection position between the first split piece and the explosion-proof valve fence block can be increased, the connection reliability between the first split piece and the explosion-proof valve fence block is improved, and the first clamping grooves with even numbers are symmetrically arranged about the first clamping support, so that the connection reliability between the first split piece and the explosion-proof valve fence block can be further improved.

The second clamping grooves are in an even number, and every two of the even number of second clamping grooves are symmetrically arranged relative to the second clamping support. The first clamping grooves with even numbers are arranged, so that the connection position between the second split piece and the explosion-proof valve fence block can be increased, the connection reliability between the second split piece and the explosion-proof valve fence block is improved, and the second clamping grooves in the second clamping grooves with even numbers are symmetrically arranged relative to the second clamping support, so that the connection reliability between the second split piece and the explosion-proof valve fence block can be further improved.

As an optional implementation manner, in an embodiment of the first aspect of the present invention, the shape of the first clip is trapezoidal, and the width of the first clip in the width direction of the lower plastic part gradually decreases along a direction away from the explosion-proof valve fence block in the length direction; therefore, the two side surfaces of the first clamping support in the width direction can be designed to be guide inclined planes, and the first split piece and the explosion-proof valve fence block can play a role in guiding when being split, so that the first clamping support and the first opening groove can be separated conveniently.

The second clamping support is trapezoid in shape, and the width of the second clamping support in the width direction of the lower plastic part is gradually reduced along the direction away from the explosion-proof valve fence block in the length direction; therefore, the two side surfaces of the second clamping support in the width direction can be designed to be guide inclined planes, and the second split piece and the explosion-proof valve fence block can play a role in guiding when being split, so that the second clamping support and the second opening groove can be separated conveniently.

In a second aspect, the invention discloses an end cover assembly, which comprises an end cover plate, a first pole, a second pole and the lower plastic part according to the first aspect, wherein the first split part, the explosion-proof valve fence block and the second split part are arranged on the same side of the end cover plate, and the end cover plate is provided with a first mounting hole opposite to the first pole hole and a second mounting hole opposite to the second pole hole; the first pole is sequentially penetrated with the first mounting hole and the first pole hole, and the second pole is sequentially penetrated with the second mounting hole and the second pole hole. The end cover assembly with the lower plastic part in the first aspect can realize recycling of the lower plastic part on the premise of not damaging the original structure of the lower plastic part, and avoids the condition that dust is generated in the recycling process to pollute the environment.

As an optional implementation manner, in an embodiment of the second aspect of the present invention, the first pole includes a first column portion and a first disc portion, the first column portion is penetrated through and provided with the first mounting hole and the first pole hole in sequence, the first disc portion is connected to one end of the first column portion and is located outside the first pole hole, and the first split piece and the first clamping bracket are clamped between the first disc portion and the end cover plate; the first disc body and the end cover plate of the first pole clamp one end, far away from the explosion-proof valve fence block, of the first clamping support, so that the first clamping support can be prevented from tilting from the first opening groove, the connection stability of the first clamping support and the first opening groove is improved, and meanwhile, the situation that the electrode assembly is damaged due to the fact that the first clamping support collides with the electrode lug on the vibration or fracture electrode assembly can be avoided.

The second post comprises a second post body part and a second disc body part, the second post body part is arranged in a penetrating manner and sequentially penetrates through the second mounting hole and the second post hole, the second disc body part is connected to one end of the second post body part and is positioned outside the second post hole, and the second sub-body part and the second clamping support are clamped between the second disc body part and the end cover plate. The second tray body part and the end cover plate of the second pole are used for clamping one end, far away from the explosion-proof valve fence block, of the second clamping support, so that the second clamping support can be prevented from tilting from the second opening groove, the connection stability of the second clamping support and the second opening groove is improved, and meanwhile, the situation that the electrode assembly is damaged due to the fact that the second clamping support collides with the electrode lug on the vibration breaking or cutting electrode assembly can be avoided.

In a third aspect, the present invention discloses an energy storage device, which includes a housing, an electrode assembly, and an end cap assembly according to the second aspect, the housing has an opening, the electrode assembly is disposed in the housing, the end cap plate is hermetically connected to the opening, the lower plastic member is disposed towards the electrode assembly, and the first pole and the second pole are respectively electrically connected to the electrode assembly. The energy storage device with the end cover assembly according to the second aspect has the beneficial effects of the lower plastic part according to the first aspect, so that the energy storage device disclosed by the third aspect of the invention can realize recycling of the lower plastic part on the premise of not damaging the original structure of the lower plastic part, and avoid the situation that dust is generated in the recycling process to pollute the environment.

In a fourth aspect, the present invention discloses a powered device, which comprises an energy storage device according to the third aspect. The electric equipment with the energy storage device according to the third aspect has the beneficial effects of the lower plastic part according to the first aspect, so that the electric equipment disclosed by the fourth aspect of the invention can realize recycling of the lower plastic part on the premise of not damaging the original structure of the lower plastic part, and avoid the situation that dust is generated in the recycling process to pollute the environment.

Compared with the prior art, the invention has the beneficial effects that:

according to the lower plastic part, the end cover assembly, the energy storage device and the electric equipment, the lower plastic part adopts the first split part, the explosion-proof valve fence block and the second split part which are arranged in a split mode, the first split part is provided with the first open slot, the first clamping support is arranged on one side of the explosion-proof valve fence block, the first open slot is communicated with the first pole hole and penetrates through the side face, facing the explosion-proof valve fence block, of the first split part, so that the first clamping support can be embedded into the first open slot to realize connection of the first split part and the explosion-proof valve fence block, meanwhile, the first split part can slide relatively to the explosion-proof valve fence block along the first direction, and the first split part and the first clamping support are separated to realize separation of the first split part and the explosion-proof valve fence block; similarly, a second open slot is formed in the second split piece, a second clamping support is arranged on the other side of the explosion-proof valve fence block, the second open slot is communicated with the second pole hole and penetrates through the side face, facing the explosion-proof valve fence block, of the second split piece, the second clamping support can be embedded into the second open slot, connection of the second split piece and the explosion-proof valve fence block is achieved, meanwhile sliding of the second split piece in the second direction cannot be limited by the second pole, the second split piece can slide along the second direction relative to the explosion-proof valve fence block, and the second open slot and the second clamping support are separated, so that the first split piece and the explosion-proof valve fence block are detached.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are needed in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

FIG. 1 is a schematic diagram of a lower plastic part according to an embodiment of the present application;

FIG. 2 is an exploded view of the lower plastic part of FIG. 1;

FIG. 3 is a schematic view of another view of the lower plastic part according to the embodiment of the present invention;

FIG. 4 is a schematic view of the lower plastic part in FIG. 3;

FIG. 5 is a partial enlarged view at M in FIG. 4;

FIG. 6 is a schematic view of the lower plastic part of FIG. 3 from another view;

FIG. 7 is a partial enlarged view at N in FIG. 6;

FIG. 8 is a schematic view of the structure of an explosion-proof valve fence disclosed in an embodiment of the present invention;

FIG. 9 is a front view of an explosion proof valve fence block disclosed in an embodiment of the present invention;

FIG. 10 is a schematic illustration of the structure of an end cap assembly disclosed in an embodiment of the present invention;

FIG. 11 is a schematic view of an alternative view of an end cap assembly according to an embodiment of the present invention;

FIG. 12 is a schematic illustration of an exploded construction of an end cap assembly according to an embodiment of the present disclosure;

FIG. 13 is a schematic diagram of an energy storage device according to an embodiment of the present invention;

fig. 14 is an exploded view of an energy storage device according to an embodiment of the present invention.

Description of the main reference numerals

10-lower plastic parts; 11-a first split piece; 11 a-a first side; 11 b-a first surface; 11 c-a second surface; 111-a first pole hole; 112-a first open slot; 113-first snap-on protrusions; 114-a first latch member; 1141-a first body portion; 1142-a first head; 115-a first boss; 116-a first stiffener; 117-first extension; 12-an explosion-proof valve fence block; 12 a-a third side; 12 b-fourth side; 12 c-a third surface; 12 d-a fourth surface; 121-a first card holder; 122-a second card holder; 123-a first card slot; 123 a-a first groove wall surface; 1231-first jack; 1232-first resilient tooth; 1232 a-a first end; 1233-a first central bore; 124-a second card slot; 124 a-a second groove wall surface; 1241-a second receptacle; 1242-a second resilient tooth; 1242 a-second end; 1243-a second central bore; 13-a second split piece; 13 a-a second side; 13 b-a fifth surface; 13 c-a sixth surface; 131-second post holes; 132-a second open slot; 133-second snap tabs; 134-second latch member; 1341-a second body portion; 1342-second header; 135-a second boss; 136-second reinforcing ribs; 137-a second extension;

20-an end cap assembly; 21-end cover plates; 211-a first mounting hole; 212-a second mounting hole; 22-a first pole; 221-a first column portion; 222-a first tray portion; 23-second pole; 231-a second column section; 232-second tray body.

30-an energy storage device; 31-a housing; 311-opening; 32-electrode assembly.

Detailed Description

The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.

In the present invention, the terms "upper", "lower", "left", "right", "front", "rear", "top", "bottom", "inner", "outer", "middle", "vertical", "horizontal", "lateral", "longitudinal" and the like indicate an azimuth or a positional relationship based on that shown in the drawings. These terms are only used to better describe the present invention and its embodiments and are not intended to limit the scope of the indicated devices, elements or components to the particular orientations or to configure and operate in the particular orientations.

Also, some of the terms described above may be used to indicate other meanings in addition to orientation or positional relationships, for example, the term "upper" may also be used to indicate some sort of attachment or connection in some cases. The specific meaning of these terms in the present invention will be understood by those of ordinary skill in the art according to the specific circumstances.

Furthermore, the terms "mounted," "configured," "provided," "connected," and "connected" are to be construed broadly. For example, it may be a fixed connection, a removable connection, or a unitary construction; may be a mechanical connection, or an electrical connection; may be directly connected, or indirectly connected through intervening media, or may be in internal communication between two devices, elements, or components. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art according to the specific circumstances.

Furthermore, the terms "first," "second," and the like, are used primarily to distinguish between different devices, elements, or components (the particular species and configurations may be the same or different), and are not used to indicate or imply the relative importance and number of devices, elements, or components indicated. Unless otherwise indicated, the meaning of "a plurality" is two or more.

The technical scheme of the application will be further described with reference to the examples and the accompanying drawings.

Referring to fig. 1 to 4, a lower plastic member is disclosed in the embodiments of the present application, which can be mounted on an end cover, and the lower plastic member 10 has a length direction, a width direction and a thickness direction perpendicular to each other. For convenience of description, the length direction of the lower plastic part 10 shown in fig. 1 to 4 is defined as a left-right direction, the width direction of the lower plastic part 10 is a front-rear direction, and the thickness direction of the lower plastic part 10 is an up-down direction, which are perpendicular to each other. The terms "upper", "lower", and the like mentioned in the description of the embodiments of the present application are described according to the orientations shown in fig. 1 to fig. 4 of the specification, and do not limit the lower plastic part 10 in the practical application scenario.

As shown in fig. 4 to 7, the lower plastic part 10 includes a first split part 11, an explosion-proof valve fence block 12 and a second split part 13 assembled in sequence along a length direction, wherein the first split part 11 has a first side 11a facing the explosion-proof valve fence block 12, the first opening slot 112 penetrates the first side 11a, the second split part 13 has a second side 13a facing the explosion-proof valve fence block 12, the second opening slot 132 penetrates the second side 13a, the explosion-proof valve fence block 12 has a third side 12a facing the first split part 11 and a fourth side 12b facing the second split part 13, the first clamping bracket 121 is disposed on the third side 12a, and the second clamping bracket 122 is disposed on the fourth side 12b. The length direction includes opposite first and second directions, wherein the first direction is a direction from the explosion proof valve barrier block 12 toward the first split member 11, for example, the first direction may be a leftward direction in fig. 1, and the second direction is a direction from the explosion proof valve barrier block 12 toward the second split member 13, for example, the second direction may be a rightward direction in fig. 1.

The first split piece 11 is provided with a first pole hole 111 and a first open slot 112 communicated with the first pole hole 111, the first pole hole 111 is used for the first pole to pass through, and the opening of the first open slot 112 is positioned on the first side face 11a of the first split piece 11; the second split piece 13 is provided with a second post hole 131 and a second open slot 132 communicated with the second post hole 131, the second post hole 131 is used for the second post to pass through, and the opening of the second open slot 132 is positioned on the second side face 13a of the second split piece 13; the third side 12a of the explosion-proof valve fence block 12 is provided with a first clamping support 121, the fourth side 12b is provided with a second clamping support 122, the first clamping support 121 is detachably embedded into the first opening groove 112, the second clamping support 122 is detachably embedded into the second opening groove 132, and the first split piece 11 can slide relative to the explosion-proof valve fence block 12 along a first direction so as to separate the first opening groove 112 from the first clamping support 121, and the second split piece 13 can slide relative to the explosion-proof valve fence block 12 along a second direction so as to separate the second opening groove 132 from the second clamping support 122.

That is, the connection between the first split member 11 and the explosion-proof valve fence block 12 can be achieved by the fitting connection of the first opening groove 112 and the first clamp bracket 121, and the connection between the second split member 13 and the explosion-proof valve fence block 12 can be achieved by the fitting connection of the second opening groove 132 and the second clamp bracket 122; meanwhile, as the first opening groove 112 penetrates through the side face of the first split piece 11, which faces the explosion-proof valve fence block 12, the sliding of the first split piece 11 in the first direction is not limited by the first pole, so that the first split piece 11 can slide relative to the explosion-proof valve fence block 12 along the first direction, and the first opening groove 112 and the first clamping support 121 are separated, so that the first split piece 11 is detached from the explosion-proof valve fence block 12; similarly, since the second opening groove 132 penetrates the side surface of the second split member 13 facing the explosion-proof valve fence block 12, the sliding of the second split member 13 in the second direction is not limited by the second pole, so that the second split member 13 can slide along the second direction relative to the explosion-proof valve fence block 12 to separate the second opening groove 132 from the second clamping bracket 122, so as to detach the second split member 13 from the explosion-proof valve fence block 12. When the battery is recovered, the two split parts (namely the first split part 11 and the second split part 13) of the lower plastic part 10 can slide reversely along two opposite directions, so that the first opening groove 112 is separated from the first clamping support 121, the second opening groove 132 is separated from the second clamping support 122, the two split parts can be detached from the explosion-proof valve fence block 12, and then the explosion-proof valve fence block 12 is taken down from the end cover plate, thereby completing the recovery of the lower plastic part 10, realizing the recovery and the utilization of the lower plastic part 10 without damaging the original structure of the lower plastic part 10, and avoiding the environment pollution caused by dust generated in the recovery process.

In some embodiments, the shape of the first clamping bracket 121 is trapezoid, and the width of the first clamping bracket 121 in the width direction of the lower plastic part 10 gradually decreases along the direction away from the explosion-proof valve fence block 12 in the length direction, that is, the width of the first clamping bracket 121 in the width direction of the lower plastic part 10 decreases further away from the explosion-proof valve fence block 12 in the length direction; in this way, the two side surfaces of the first clamping support 121 in the width direction can be designed as guiding inclined surfaces, and the first clamping support 121 and the first opening groove 112 can be conveniently separated under the guiding effect when the first split piece 11 and the explosion-proof valve fence block 12 are detached.

Similarly, the shape of the second clamping support 122 is trapezoid, and the width of the second clamping support 122 in the width direction of the lower plastic part 10 gradually decreases along the direction away from the explosion-proof valve fence block 12 in the length direction, that is, the width of the second clamping support 122 in the width direction of the lower plastic part 10 decreases away from the explosion-proof valve fence block 12 in the length direction; in this way, the two lateral sides of the second clamping support 122 in the width direction can be designed as guiding inclined planes, and the second clamping support 122 and the second opening groove 132 can be conveniently separated under the guiding effect when the second split piece 13 and the explosion-proof valve fence block 12 are detached.

In some embodiments, one of the first side 11a and the third side 12a is provided with a first clamping groove 123, and the other of the first side 11a and the third side 12a is convexly provided with a first clamping protrusion 113, that is, when the first side 11a is provided with the first clamping groove 123, the third side 12a is convexly provided with the first clamping protrusion 113, or when the first side 11a is provided with the first clamping protrusion 113, the third side 12a is convexly provided with the first clamping groove 123, and the first clamping protrusion 113 and the first clamping groove 123 are in snap connection. Through increasing first draw-in groove 123 and first card convex part 113 for not only can be connected through first open slot 112 and first card support 121 between first components of a whole that can function independently spare 11 and the explosion-proof valve fence piece 12, still can be connected through first draw-in groove 123 and first card convex part 113 realization, thereby can make the connection between first components of a whole that can function independently spare 11 and the explosion-proof valve fence piece 12 more stable, and then can effectively avoid the circumstances that leads to first components of a whole that can function independently spare 11 and the separation of explosion-proof valve fence piece 12 when the cooperation structure of first open slot 112 and first card support 121 appears becoming flexible.

Similarly, one of the second side 13a and the fourth side 12b is provided with a second clamping groove 124, and the other of the second side 13a and the fourth side 12b is convexly provided with a second clamping protrusion 133, that is, when the second side 13a is provided with the second clamping groove 124, the fourth side 12b is convexly provided with the second clamping protrusion 133, or when the second side 13a is provided with the second clamping protrusion 133, the fourth side 12b is convexly provided with the second clamping groove 124, and the second clamping protrusion 133 and the second clamping groove 124 are in snap connection. Through increasing second draw-in groove 124 and second card convex part 133 for not only can realize being connected through second open slot 132 and second card support 122 between second components of a whole that can function independently 13 and the explosion-proof valve fence piece 12, can also realize being connected through second draw-in groove 124 and second card convex part 133, thereby can make the connection between second components of a whole that can function independently 13 and the explosion-proof valve fence piece 12 more stable, and then can effectively avoid leading to the condition of second components of a whole that can function independently 13 and the separation of explosion-proof valve fence piece 12 when the cooperation structure of second open slot 132 and second card support 122 appears not hard up.

Since the first side surface 11a is provided with the first locking groove 123, the specific structure of the first locking groove 123 and the first locking protrusion 113 when the first locking protrusion 113 is provided on the third side surface 12a is substantially identical to the specific structure of the first locking groove 123 and the first locking protrusion 113 when the first side surface 11a is provided with the first locking protrusion 113 and the third side surface 12a is provided with the first locking groove 123; meanwhile, since the specific structures of the second engaging groove 124 and the second engaging protrusion 133 when the second engaging protrusion 133 is provided on the second side surface 13a and the specific structures of the second engaging groove 124 and the second engaging protrusion 133 when the second engaging protrusion 124 is provided on the fourth side surface 12b are substantially identical to each other, the specific structures of the second engaging protrusion 113 and the first engaging protrusion 123 will be described below by taking the example of "the first engaging protrusion 113 is provided on the first side surface 11a and the first engaging protrusion 123 is provided on the third side surface 12 a", and the specific structures of the second engaging protrusion 133 and the second engaging protrusion 124 will be described below by taking the example of "the second engaging protrusion 133 is provided on the second side surface 13a and the second engaging protrusion 124 is provided on the fourth side surface 12 b", as shown in fig. 4 to 7.

In some embodiments, as shown in fig. 4 and 6, the first card slots 123 are an even number, for example, two, four, six, or eight, and the first card slots 123 in the even number are symmetrically disposed about the first card holder 121. The first clamping grooves 123 with even numbers are arranged, so that the connection positions between the first split piece 11 and the explosion-proof valve fence block 12 can be increased, the connection reliability between the first split piece 11 and the explosion-proof valve fence block 12 is improved, the first clamping grooves 123 with even numbers in the first clamping grooves 123 are symmetrically arranged about the first clamping support 121, and the connection reliability between the first split piece 11 and the explosion-proof valve fence block 12 can be further improved.

Similarly, the number of the second clamping grooves 124 is even, for example, two, four, six or eight, and the like, and two second clamping grooves 124 in the even number of the second clamping grooves 124 are symmetrically arranged about the second clamping bracket 122, so that not only can the connection position between the second split piece 13 and the explosion-proof valve fence block 12 be increased, but also the connection reliability between the second split piece 13 and the explosion-proof valve fence block 12 can be improved, and the connection reliability between the second split piece 13 and the explosion-proof valve fence block 12 can be further improved by arranging two second clamping grooves 124 in the even number of the second clamping grooves 124 symmetrically about the second clamping bracket 122.

In some embodiments, as shown in fig. 4, 6 and 8, the first split member 11 has a first surface 11b and a second surface 11c opposite to each other in the thickness direction (for example, in the up-down direction in fig. 4 and 6), the explosion-proof valve fence block 12 has a third surface 12c and a fourth surface 12d opposite to each other in the thickness direction, and the second split member 13 has a fifth surface 13b and a sixth surface 13c opposite to each other in the thickness direction, and the first surface 11b, the third surface 12c and the fifth surface 13b are located on the same side of the lower plastic member in the thickness direction. The first clamping groove 123 penetrates through the third surface 12c of the explosion-proof valve fence block 12, the first clamping groove 123 has a first groove wall surface 123a facing the same direction as the third surface 12c, the first groove wall surface 123a is provided with a first inserting hole 1231, the lower plastic part 10 further comprises a first latch piece 114, and when the first clamping protrusion 113 is embedded in the first clamping groove 123, the first latch piece 114 penetrates through the first inserting hole 1231 and is connected to the first clamping protrusion 113, for example, is inserted into the first clamping protrusion 113. The second clamping groove 124 penetrates through the third surface 12c of the explosion-proof valve fence block 12, and the second clamping groove 124 has a second groove wall surface 124a facing the same direction as the third surface 12c, the second groove wall surface 124a is provided with a second insertion hole 1241, the lower plastic part 10 further comprises a second latch piece 134, and the second latch piece 134 penetrates through the second insertion hole 1241 and is connected to the second protruding clamping part 133, for example, is inserted into the second protruding clamping part 133.

By adding the first latch member 114 and the first insertion hole 1231, the connection of the first clamping groove 123 and the first clamping protrusion 113 can be made more stable, thereby being beneficial to further improving the connection reliability between the first split member 11 and the explosion-proof valve fence block 12. By adding the second latch member 134 and the second insertion hole 1241, the connection between the second clamping groove 124 and the second clamping protrusion 133 can be more stable, so that the connection reliability between the second split member 13 and the explosion-proof valve fence block 12 can be further improved.

In the present embodiment, the first insertion hole 1231 may penetrate the fourth surface 12d of the explosion proof valve fence block 12 in the thickness direction of the lower plastic member 10, or may not penetrate the fourth surface 12d of the explosion proof valve fence block 12 in the thickness direction of the lower plastic member 10. Preferably, as shown in fig. 4 to 8, the first insertion hole 1231 penetrates through the fourth surface 12d of the explosion-proof valve fence block 12 in the thickness direction of the lower plastic part 10, the first latch member 114 may include a first main body portion 1141 and a first head portion 1142 having a radial dimension larger than that of the first main body portion 1141, the first main body portion 1141 penetrates through the first insertion hole 1231 and is connected to the first protruding portion 113, for example, is inserted into the first protruding portion 113, and the first main body portion 1141 extends along the thickness direction of the lower plastic part 10, the first head portion 1142 is connected to the first main body portion 1141 and is located outside the first insertion hole 1231, and the first head portion 1142 is stopped against the fourth surface 12d of the explosion-proof valve fence block 12 in the thickness direction, when the plastic part 10 is applied to the end cap assembly of the energy storage device, the first head portion 1142 is stopped against the explosion-proof valve fence block 12 in the thickness direction and faces the fourth surface 12d of the electrode assembly, so that the first insertion hole 1141 can not only be easily stopped by the first head portion 1142 to cooperate with the explosion-proof valve fence block 12 to release the first main body portion 1231, and the first insertion hole 1141 can be prevented from being easily released; meanwhile, the first head 1142 can be used for stopping the lug of the limiting electrode assembly, so that the lug is prevented from shielding the explosion-proof valve fence block 12, and gas in the shell of the energy storage device can pass through the explosion-proof valve fence block 12 and be discharged to the explosion-proof valve for pressure relief and explosion prevention, and the pressure relief effect of the explosion-proof valve is ensured.

In the present embodiment, the second insertion hole 1241 may penetrate the fourth surface 12d of the explosion proof valve fence block 12 in the thickness direction of the lower plastic member 10, or may not penetrate the fourth surface 12d of the explosion proof valve fence block 12 in the thickness direction of the lower plastic member 10. Preferably, the second insertion hole 1241 penetrates the fourth surface 12d of the explosion-proof valve fence block 12 in the thickness direction of the lower plastic member 10, the second latch member 134 includes a second main body portion 1341 and a second head portion 1342 having a larger radial dimension than the second main body portion 1341, the second main body portion 1341 penetrates the second insertion hole 1241 and is connected to the second click portion 133, for example, is inserted into the second click portion 133, and the second main body portion 1341 extends in the thickness direction of the lower plastic member 10, the second head portion 1342 is connected to the second main body portion 1341 and is located outside the second insertion hole 1241, and the second head portion 1342 abuts against the fourth surface 12d of the explosion-proof valve fence block 12 in the thickness direction. When the lower plastic part 10 is applied to the end cover assembly of the energy storage device, the second head 1342 is abutted against the explosion-proof valve fence block 12 along the rear thickness direction and faces the fourth surface 12d of the electrode assembly, so that the second head 1342 is utilized to cooperate with the explosion-proof valve fence block 12 to limit the second main body 1341, and the second main body 1341 can be firmly penetrated into the second jack 1241, so that the condition that the second main body 1341 is easy and loose to separate from the second jack 1241 is avoided; meanwhile, the second head 1342 can be used for stopping the lug of the limiting electrode assembly, so that the lug is prevented from shielding the explosion-proof valve fence block 12, and gas in the shell of the energy storage device can pass through the explosion-proof valve fence block 12 and be discharged to the explosion-proof valve for pressure relief and explosion prevention, and the pressure relief effect of the explosion-proof valve is ensured.

Illustratively, the first body portion 1141 may have a cylindrical structure, and the first head portion 1142 may have a hemispherical structure, and then a radial dimension of the first head portion 1142 greater than a radial dimension of the first body portion 1141 may be understood as: the radius of the first head 1142 is greater than the radius of the first body 1141. In addition, the surface of the first head 1142 facing away from the first body 1141 (i.e., the surface of the first head 1142 contacting the electrode assembly) is a smooth curved surface, such as a smooth arc surface, so that the first head 1142 can be prevented from cutting and damaging the tab, thereby protecting the electrode assembly. Similarly, the second body portion 1341 may have a cylindrical structure, and the second head portion 1342 may have a hemispherical structure, and then the radial dimension of the second head portion 1342 is greater than the radial dimension of the second body portion 1341 may be understood as: the radius of second head portion 1342 is greater than the radius of second body portion 1341. In addition, the surface of the second head portion 1342 facing away from the second body portion 1341 (i.e., the surface of the second head portion 1342 contacting the electrode assembly) is a smooth curved surface, such as a smooth curved surface, so that the second head portion 1342 can be prevented from cutting and damaging the tab, thereby protecting the electrode assembly.

In some embodiments, as shown in fig. 4 and 6, the second surface 11c of the first split member 11 is provided with a first boss 115, and the first boss 115 is located at an end of the first split member 11 away from the explosion-proof valve fence block 12 in the length direction, the first boss 115 may extend in the width direction (for example, the front-rear direction in fig. 4 and 6) of the lower plastic member 10, and in the protruding direction (for example, the downward direction in fig. 4 and 6) of the first boss 115, a surface of the first boss 115 facing away from the first split member 11 is higher than a surface of the first head 1142 facing away from the first main body 1141; the sixth surface 13c of the second sub-member 13 is provided with a second boss 135, and the second boss 135 is located at an end of the second sub-member 13 away from the explosion-proof valve fence block 12 in the length direction, and the second boss 135 may be extended in the width direction of the lower plastic member 10, and in the protruding direction (e.g., downward direction in fig. 4 and 6) of the second boss 135, a surface of the second boss 135 facing away from the second sub-member 13 is higher than a surface of the second head 1342 facing away from the second main body 1341. Thus, when the energy storage device vibrates, the electrode assembly is usually contacted with the first boss 115 and the second boss 135, and is stopped and limited by the first boss 115 and the second boss 135, so as to prevent the electrode assembly from stirring the first latch member 114 and the second latch member 134 when the energy storage device vibrates, and leading to the loose connection between the first latch member 114 and the first jack 1231, and the loose connection between the second latch member 134 and the second jack 1241, thereby being beneficial to improving the connection stability between the first clamping groove 123 and the first clamping boss 113, and improving the connection stability between the second clamping groove 124 and the second clamping boss 133, and further being beneficial to ensuring the connection reliability of the first split member 11 and the explosion-proof valve fence block 12, and ensuring the connection reliability of the second split member 13 and the explosion-proof valve fence block 12. In addition, the first boss 115 and the second boss 135 can play a role in reinforcing the strength of the first split member 11 and the second split member 13, and can also increase the area of hot melting of the mayar protective film.

In some embodiments, at least one end of the first boss 115 is formed with a first reinforcing rib 116 connecting the first boss 115 and the first split member 11 in the width direction of the lower plastic member 10. Preferably, in the width direction of the lower plastic member 10, first reinforcing ribs 116 connecting the first boss 115 and the first split member 11 are formed at both ends of the first boss 115, respectively. Through respectively forming the first strengthening rib 116 of connecting first boss 115 and first components of a whole that can function independently 11 at the both ends of first boss 115, both can promote the structural strength of first components of a whole that can function independently 11, can increase the area of mayar protection film hot melt again.

Similarly, in the width direction of the lower plastic member 10, at least one end of the second boss 135 is formed with a second reinforcing rib 136 connecting the second boss 135 and the second split member 13. Preferably, the second bosses 135 are formed at both ends thereof in the width direction of the lower plastic member 10 with second reinforcing ribs 136 connecting the second bosses 135 and the second split members 13, respectively. Through respectively forming the second reinforcing ribs 136 connecting the second boss 135 and the second split member 13 at the two ends of the second boss 135, not only the structural strength of the second split member 13 can be improved, but also the hot melting area of the mayar protective film can be increased.

In some embodiments, the first split member 11 is further provided with a first extension portion 117, where the first extension portion 117 is located at one side of the first split member 11 in the width direction and protrudes in the thickness direction of the first split member 11, that is, the first extension portion 117 and the first boss 115 protrude toward the same side of the first split member 11, and the protruding first extension portion 117 corresponds to a skirt edge forming the first split member 11, and the skirt edge can be used as a reinforcing rib of the first split member 11, so that the structural strength of the first split member 11 is improved. The second split member 13 is further provided with a second extension portion 137, and the second extension portion 137 is located at one side of the second split member 13 in the width direction and protrudes in the thickness direction of the second split member 13, that is, the second extension portion 137 and the second boss 135 protrude toward the same side of the second split member 13, and the protruding second extension portion 137 corresponds to a skirt edge forming the second split member 13, and the skirt edge can serve as a reinforcing rib of the second split member 13, so that the structural strength of the second split member 13 is improved.

In some embodiments, as shown in fig. 5, 8 and 9, the inner wall of the first jack 1231 includes a plurality of continuous first elastic teeth portions 1232, the first body portion 1141 of the first latch member 114 is disposed through the first jack 1231 and abuts against the first elastic teeth portions 1232, that is, the hole wall surface of the first jack 1231 is convexly provided with a plurality of first elastic teeth portions 1232 toward the center of the first jack 1231, for example, two, three, four, five, six, eight, ten or more first elastic teeth portions 1232, the plurality of first elastic teeth portions 1232 are arranged at intervals along the circumferential direction of the first jack 1231, and each of the first elastic teeth portions 1232 has a first end 1232a far from the hole wall surface of the first jack 1231, and the plurality of first ends 1232a mutually enclose a first central hole 1233 for the first body portion 1141 to be disposed. By the design, the first main body 1141 of the first latch member 114 and the first jack 1231 are in interference fit, so that the connection between the first main body 1141 and the first jack 1231 is more stable, the first elastic tooth 1232 has elasticity and can be elastically deformed, the first latch member 114 can be conveniently pulled out, and the first split member 11 can be conveniently and rapidly detached.

Further, the first head 1142 is abutted against the plurality of first elastic teeth 1232, and since the first elastic teeth 1232 have elasticity, elastic deformation can occur, even if the length of the first body 1141 in the thickness direction of the lower plastic part 10 is slightly shorter than the length of the preset length due to processing errors, the first body 1141 can be abutted against the first elastic teeth 1232 to elastically deform, so as to compensate the length errors of the first body 1141 in the thickness direction of the lower plastic part 10, so that the first body 1141 can be inserted into the first central hole 1233 in an interference manner, and the first head 1142 is abutted against the plurality of first elastic teeth 1232, thereby completing the assembly of the first latch member 114 and the first jack 1231, and thus the assembly accuracy between the first latch member 114 and the first jack 1231 can be reduced.

Similarly, as shown in fig. 7 to 9, the inner wall of the second receptacle 1241 includes a plurality of continuous second elastic teeth 1242, the second body portion 1341 of the second latch 134 is disposed through the second receptacle 1241 and abuts against the second elastic teeth 1242, that is, the hole wall surface of the second receptacle 1241 is convexly provided with a plurality of second elastic teeth 1242 toward the center of the second receptacle 1241, for example, two, three, four, five, six, eight, ten or more second elastic teeth 1242, the plurality of second elastic teeth 1242 are arranged at intervals along the circumferential direction of the second receptacle 1241, and each of the second elastic teeth 1242 has a second end 1242a far from the hole wall surface of the second receptacle 1241, and the plurality of second ends 1242a mutually enclose to form a second central hole 1243 for the second body portion 1341 to be disposed through. By such design, the second main body portion 1341 of the second latch piece 134 and the second jack 1241 are in interference fit, so that the connection between the second main body portion 1341 and the second jack 1241 is more stable, and the second elastic tooth portion 1242 has elasticity and can be elastically deformed, so that the second latch piece 134 can be conveniently pulled out, and the second split piece 13 can be conveniently and rapidly detached.

Further, the second head 1342 is abutted against the plurality of second elastic teeth 1242, and since the second elastic teeth 1242 are elastic, elastic deformation can occur, even if the length of the second body 1341 in the thickness direction of the lower plastic part 10 is slightly shorter than the preset length due to processing errors, the second elastic teeth 1242 can be pressed by the second head 1342 to elastically deform, so as to compensate the length errors of the second body 1341 in the thickness direction of the lower plastic part 10, so that the second body 1341 can be inserted into the second central hole 1243 in an interference manner, and the second head 1342 is abutted against the plurality of second elastic teeth 1242, thereby completing the assembly of the second latch 134 and the second jack 1241, and thus the assembly accuracy between the second latch 134 and the second jack 1241 can be reduced.

In some embodiments, the center of the first central hole 1233 and the center of the first insertion hole 1231 are coaxially disposed, so that the length of each first elastic tooth portion 1232 in the radial direction of the first insertion hole 1231 can be maintained, so that each first elastic tooth portion 1232 can generate approximately the same deformation when being pressed by the first body portion 1141, so that the acting force exerted by each first elastic tooth portion 1232 on the first body portion 1141 can be approximately consistent, and the stress of the first body portion 1141 can be relatively uniform, which is beneficial to making the assembly between the first latch member 114 and the first insertion hole 1231 more stable.

Similarly, the center of the second center hole 1243 and the center of the second insertion hole 1241 are coaxially disposed, so that the length of each second elastic tooth part 1242 in the radial direction of the second insertion hole 1241 can be maintained, so that each second elastic tooth part 1242 can generate approximately the same deformation when being pressed by the second body part 1341, the acting force exerted by each second elastic tooth part 1242 on the second body part 1341 can be approximately consistent, and the stress of the second body part 1341 is relatively uniform, which is beneficial to making the assembly between the second latch 134 and the second insertion hole 1241 more stable.

Referring to fig. 10 to 12, the second aspect of the present invention discloses an end cap assembly, wherein the end cap assembly 20 includes an end cap plate 21, a first post 22, a second post 23, and the lower plastic member 10 as described above, the first split member 11, the explosion-proof valve fence block 12, and the second split member 13 are disposed on the same side of the end cap plate 21, and the end cap plate 21 is provided with a first mounting hole 211 opposite to the first post hole 111 and a second mounting hole 212 opposite to the second post hole 131; the first pole 22 sequentially penetrates through the first mounting hole 211 and the first pole hole 111, and the second pole 23 sequentially penetrates through the second mounting hole 212 and the second pole hole 131. It will be appreciated that the end cap assembly 20 having the lower plastic part 10 described above can bring about the same or similar advantageous effects, and specific reference will be made to the description of the embodiment of the lower plastic part 10, which will not be repeated herein.

In some embodiments, as shown in fig. 12, the first pole 22 includes a first column portion 221 and a first tray portion 222, the first column portion 221 is penetrated through the first mounting hole 211 and the first pole hole 111 sequentially, the first tray portion 222 is connected to one end of the first column portion 221 and is located outside the first column hole 111, and the first split member 11 and the first clamping bracket 121 are clamped between the first tray portion 222 and the end cover 21. The first disc body 222 of the first pole 22 and the end cover plate 21 clamp one end, far away from the explosion-proof valve fence block 12, of the first clamping support 121, so that the first clamping support 121 can be prevented from being lifted up from the first opening groove 112, the connection stability of the first clamping support 121 and the first opening groove 112 is improved, and meanwhile, the situation that the electrode assembly is damaged due to the fact that the first clamping support 121 collides against the electrode lug on the broken or split electrode assembly can be avoided.

Similarly, the second post 23 includes a second post portion 231 and a second plate portion 232, the second post portion 231 is disposed through the second mounting hole 212 and the second post hole 131, the second plate portion 232 is connected to one end of the second post portion 231 and is located outside the second post hole 131, and the second sub-component 13 and the second clamping support 122 are clamped between the second plate portion 232 and the end cover 21. The second disc body 232 of the second pole 23 and the end cover plate 21 clamp one end, far away from the explosion-proof valve fence block 12, of the second clamping support 122, so that the second clamping support 122 can be prevented from tilting from the second open groove 132, the connection stability of the second clamping support 122 and the second open groove 132 is improved, and meanwhile, the situation that the electrode assembly is damaged due to the fact that the second clamping support 122 collides with the electrode lug on the vibration or fracture electrode assembly can be avoided.

Referring to fig. 13 and 14, a third aspect of the present application discloses an energy storage device. Specifically, as shown in fig. 12 to 14, the energy storage device 30 includes a housing 31, an electrode assembly 32 and the end cap assembly 20 as described above, the housing 31 has an opening 311, the electrode assembly 32 is disposed in the housing 31, the end cap 21 is hermetically connected to the opening 311, the lower plastic member 10 is disposed towards the electrode assembly 32, and the first pole 22 and the second pole 23 are electrically connected to the electrode assembly 32, i.e., the first disk portion 222 and the second disk portion 232 are electrically connected to the electrode assembly 32, respectively. The energy storage device 30 having the end cap assembly 20 described above, because the end cap assembly 20 can bring about the same or similar beneficial effects as the lower plastic part 10, the energy storage device 30 can also bring about the same or similar beneficial effects as the lower plastic part 10, and the description of the embodiment of the lower plastic part 10 will not be repeated here.

It is understood that the energy storage device 30 may include, but is not limited to, a battery cell, a battery module, a battery pack, a battery system, etc. When the energy storage device 30 is a single battery, it may be a prismatic battery. It can be appreciated that the practical application scenario of the energy storage device 30 provided in the embodiment of the present application may be, but is not limited to, the listed products, and may also be other application scenarios, and the embodiment of the present application does not strictly limit the application scenario of the energy storage device 30.

In a fourth aspect, the invention discloses a powered device (not shown) having an energy storage device as described above. The electric equipment can comprise, but is not limited to, automobiles, electric toys, electric tools, ships and spacecrafts, mobile phones, portable equipment, palm computers or notebook computers and the like.

The electric equipment is exemplified by an automobile, the automobile can be a fuel oil automobile, a fuel gas automobile or a new energy automobile, and the new energy automobile can be a pure electric automobile, a hybrid electric automobile or a range-extending automobile. The automobile includes a battery, a controller, and a motor. The battery is used for supplying power to the controller and the motor as an operating power supply and a driving power supply of the automobile, for example, the battery is used for the working power consumption requirements of starting, navigation and running of the automobile; for another example, the battery supplies power to the controller, the controller controls the battery to supply power to the motor, and the motor receives and uses the power of the battery as a driving power source for the automobile to supply driving power to the automobile instead of or in part instead of fuel oil or natural gas.

The lower plastic part, the end cover assembly, the energy storage device and the electric equipment disclosed by the embodiment of the invention are described in detail, the specific examples are applied to the description of the principle and the implementation mode of the invention, and the description of the above embodiment is only used for helping to understand the lower plastic part, the end cover assembly, the energy storage device and the electric equipment and the core ideas thereof; meanwhile, as those skilled in the art will vary in the specific embodiments and application scope according to the idea of the present invention, the present disclosure should not be construed as limiting the present invention in summary.

Claims

1. The lower plastic part is characterized in that the lower plastic part (10) comprises a first split part (11), an explosion-proof valve fence block (12) and a second split part (13) which are assembled in sequence along the length direction, the first split part (11) is provided with a first side face (11 a) facing the explosion-proof valve fence block (12), the second split part (13) is provided with a second side face (13 a) facing the explosion-proof valve fence block (12), and the explosion-proof valve fence block (12) is provided with a third side face (12 a) facing the first split part (11) and a fourth side face (12 b) facing the second split part (13);

the first split piece (11) is provided with a first pole hole (111) and a first open slot (112) communicated with the first pole hole (111), and an opening of the first open slot (112) is positioned on the first side face (11 a);

the second split piece (13) is provided with a second pole hole (131) and a second open slot (132) communicated with the second pole hole (131), and an opening of the second open slot (132) is positioned on the second side face (13 a);

the third side (12 a) of the explosion-proof valve fence block (12) is provided with a first clamping support (121), the fourth side (12 b) is provided with a second clamping support (122), the first clamping support (121) is detachably embedded into the first open slot (112), and the second clamping support (122) is detachably embedded into the second open slot (132).

2. The lower plastic part according to claim 1, wherein one of the first side surface (11 a) and the third side surface (12 a) is provided with a first clamping groove (123), the other of the first side surface (11 a) and the third side surface (12 a) is convexly provided with a first clamping protrusion (113), the first clamping protrusion (113) and the first clamping groove (123) are in snap connection, one of the second side surface (13 a) and the fourth side surface (12 b) is provided with a second clamping groove (124), the other of the second side surface (13 a) and the fourth side surface (12 b) is convexly provided with a second clamping protrusion (133), and the second clamping protrusion (133) and the second clamping groove (124) are in snap connection.

3. The lower plastic part according to claim 2, wherein the first split part (11) has a first surface (11 b) and a second surface (11 c) opposite in a thickness direction, the explosion-proof valve fence block (12) has a third surface (12 c) and a fourth surface (12 d) opposite in the thickness direction, the second split part (13) has a fifth surface (13 b) and a sixth surface (13 c) opposite in the thickness direction, the first surface (11 b), the third surface (12 c) and the fifth surface (13 b) are located on the same side of the lower plastic part (10) in the thickness direction;

The first clamping groove (123) penetrates through the first surface (11 b) or the third surface (12 c), the first clamping groove (123) is provided with a first groove wall surface (123 a) which faces the same as the third surface (12 c), the first groove wall surface (123 a) is provided with a first inserting hole (1231), the lower plastic part (10) further comprises a first latch piece (114), and when the first clamping convex part (113) is embedded into the first clamping groove (123), the first latch piece (114) penetrates through the first inserting hole (1231) and is connected with the first clamping convex part (113);

the second clamping groove (124) penetrates through the fifth surface (13 b) or the third surface (12 c), the second clamping groove (124) is provided with a second groove wall surface (124 a) which faces the same as the third surface (12 c), the second groove wall surface (124 a) is provided with a second insertion hole (1241), the lower plastic part (10) further comprises a second latch part (134), and when the second latch part (133) is embedded into the second clamping groove (124), the second latch part (134) penetrates through the second insertion hole (1241) and is connected with the second latch part (133).

4. A lower plastic part according to claim 3, characterized in that the first receptacle (1231) penetrates the second surface (11 c) or the fourth surface (12 d), the first latch part (114) comprises a first body part (1141) and a first head part (1142) with a radial dimension larger than the first body part (1141), the first body part (1141) penetrates the first receptacle (1231) and is connected to the first bayonet part (113), the first head part (1142) is connected to the first body part (1141) and is located outside the first receptacle (1231), and the first head part (1142) is stopped against the second surface (11 c) of the first separate part (11) or the fourth surface (12 d) of the explosion-proof valve barrier block (12);

The second insertion hole (1241) penetrates through the sixth surface (13 c) or the fourth surface (12 d), the second latch member (134) comprises a second main body portion (1341) and a second head portion (1342) with a radial dimension larger than that of the second main body portion (1341), the second main body portion (1341) penetrates through the second insertion hole (1241) and is connected to the second protruding clamping portion (133), the second head portion (1342) is connected to the second main body portion (1341) and is located outside the second insertion hole (1241), and the second head portion (1342) is stopped against the sixth surface (13 c) of the second split member (13), or the fourth surface (12 d) of the explosion-proof valve fence block (12).

5. The lower plastic part according to claim 4, wherein an inner wall of the first insertion hole (1231) comprises a plurality of continuous first elastic teeth parts (1232), and the first main body part (1141) of the first latch part (114) is penetrated through the first insertion hole (1231) and is abutted against the first elastic teeth parts (1232);

the inner wall of the second jack (1241) comprises a plurality of continuous second elastic tooth parts (1242), and the second main body part (1341) of the second latch piece (134) is arranged in the second jack (1241) in a penetrating manner and is abutted with the second elastic tooth parts (1242).

6. The lower plastic part according to claim 4, characterized in that the second surface (11 c) of the first separate part (11) is provided with a first boss (115), the first boss (115) being located at an end of the first separate part (11) facing away from the explosion-proof valve fence block (12) in the length direction, and in the protruding direction of the first boss (115), a surface of the first boss (115) facing away from the first separate part (11) being higher than a surface of the first head (1142) facing away from the first main body (1141);

the sixth surface (13 c) of the second split member (13) is provided with a second boss (135), along the length direction, the second boss (135) is located at one end of the second latch member (134) away from the explosion-proof valve fence block (12), and in the protruding direction of the second boss (135), a surface of the second boss (135) away from the second split member (13) is higher than a surface of the second head (1342) away from the second main body (1341).

7. The lower plastic part according to any one of claims 2 to 6, wherein the number of the first clamping grooves (123) is even, and every two of the even number of the first clamping grooves (123) are symmetrically arranged with respect to the first clamping bracket (121);

The second clamping grooves (124) are in an even number, and every two second clamping grooves (124) in the even number are symmetrically arranged relative to the second clamping support (122).

8. The lower plastic part according to any one of claims 1 to 6, wherein the first clamping bracket (121) is trapezoidal in shape, and the width of the first clamping bracket (121) in the width direction of the lower plastic part (10) gradually decreases in a direction away from the explosion-proof valve fence block (12) in the length direction;

the second clamping support (122) is trapezoid in shape, and the width of the second clamping support (122) in the width direction of the lower plastic part (10) is gradually reduced along the direction away from the explosion-proof valve fence block (12) in the length direction.

9. An end cap assembly, characterized in that the end cap assembly (20) comprises an end cap plate (21), a first pole (22), a second pole (23) and a lower plastic part (10) according to any one of claims 1-8, the first split part (11), the explosion-proof valve fence block (12) and the second split part (13) are arranged on the same side of the end cap plate (21), and the end cap plate (21) is provided with a first mounting hole (211) opposite to the first pole hole (111) and a second mounting hole (212) opposite to the second pole hole (131);

The first pole (22) comprises a first column body (221) and a first tray body (222), the first column body (221) is penetrated through the first mounting hole (211) and the first pole hole (111) in sequence, the first tray body (222) is connected to one end of the first column body (221) and is positioned outside the first pole hole (111), and the first split piece (11) and the first clamping support (121) are clamped between the first tray body (222) and the end cover plate (21);

the second pole (23) comprises a second pole body (231) and a second disc body (232), the second pole body (231) is arranged in a penetrating mode and sequentially penetrates through the second mounting hole (212) and the second pole body hole (131), the second disc body (232) is connected to one end of the second pole body (231) and located outside the second pole body hole (131), and the second split piece (13) and the second clamping support (122) are clamped between the second disc body (232) and the end cover plate (21).

10. An energy storage device, characterized in that the energy storage device (30) comprises a shell (31), an electrode assembly (32) and an end cover assembly (20) as claimed in claim 9, the shell (31) is provided with an opening (311), the electrode assembly (32) is arranged in the shell (31), the end cover plate (21) is connected to the opening (311) in a sealing manner, the lower plastic part (10) is arranged towards the electrode assembly (32), and a first disc part (222) of the first pole (22) and a second disc part (232) of the second pole (23) are respectively connected with the electrode assembly (32) electrically.

11. A powered device, characterized in that the powered device comprises an energy storage device (30) as claimed in claim 10.