CN210110918U

CN210110918U - Short-circuit prevention device and assembly fixture

Info

Publication number: CN210110918U
Application number: CN201921279106.4U
Authority: CN
Inventors: 陈凯华; 陈宗火; 童华桥; 周望望
Original assignee: Contemporary Amperex Technology Co Ltd
Current assignee: Contemporary Amperex Technology Co Ltd
Priority date: 2019-08-08
Filing date: 2019-08-08
Publication date: 2020-02-21
Anticipated expiration: 2029-08-08

Abstract

The utility model relates to a prevent short circuit device and assembly jig, prevent that short circuit device includes: the insulating protection piece is integrally in a strip-shaped structure body and comprises a plurality of separation arms which are sequentially arranged in the length direction of the insulating protection piece; a receiving groove is formed between two adjacent separating arms, the side wall of the receiving groove extends to at least one end face in the height direction of the insulating protection piece, and the side wall of the receiving groove extends to one end face in the width direction of the insulating protection piece. The embodiment of the utility model provides a prevent short circuit device and assembly jig can effectually prevent secondary battery short circuit phenomenon's when in groups emergence, and efficient in groups, and the uniformity of insulating processing is good to secondary battery's utmost point ear.

Description

Short-circuit prevention device and assembly fixture

Technical Field

The utility model relates to an energy storage battery auxiliary assembly technical field especially relates to a prevent short circuit device and assembly jig.

Background

With the development of technology, the application range of the secondary battery in the production or living field is wider and wider, and when the secondary battery is a soft package secondary battery, the secondary battery has the advantages of good safety performance, light weight, large capacity, small internal resistance, flexible design and the like, so that the secondary battery is very wide in application.

When the soft package secondary batteries are grouped in the prior art, it is generally necessary to stack a plurality of soft package secondary batteries sequentially in one direction on an assembly jig to form a battery module. Because laminate polymer secondary battery's utmost point ear is thinner, buckles easily and warp for a plurality of laminate polymer secondary battery are at the in-process of uniting, and utmost point ear easy contact short circuit between the adjacent secondary battery. In order to solve the problems, the common practice in the industry is to use electrician glue to perform insulation protection on the tabs of each secondary battery, and although the mode can meet the requirement of short circuit prevention to a certain extent, the mode also has the disadvantages of low grouping efficiency, poor consistency of insulation treatment of each secondary battery monomer, safety risk and the like.

SUMMERY OF THE UTILITY MODEL

The embodiment of the utility model provides a prevent short circuit device and assembly jig can effectually prevent secondary battery short circuit phenomenon's when in groups emergence, and efficient in groups, and the uniformity of insulating processing is good to secondary battery's utmost point ear.

On the one hand, according to the utility model provides a prevent short-circuit device is proposed, include: the insulating protection piece is integrally in a strip-shaped structure body and comprises a plurality of separation arms which are sequentially arranged in the length direction of the insulating protection piece; a receiving groove is formed between two adjacent separating arms, the side wall of the receiving groove extends to at least one end face in the height direction of the insulating protection piece, and the side wall of the receiving groove extends to one end face in the width direction of the insulating protection piece.

According to an aspect of an embodiment of the present invention, the partition arm includes a fixing portion and a cantilever portion which are successively arranged in the width direction and connected to each other; along length direction, the fixed parts of two adjacent separating arms are mutually butted, the cantilever parts are at least partially mutually spaced, and the accommodating groove is formed between the cantilever parts of two adjacent separating arms.

According to the utility model discloses an aspect, in two adjacent partition arms, at least one fixed part is greater than cantilever part in length direction's size at length direction's size, and the holding tank link up in the direction of height.

According to an aspect of an embodiment of the present invention, the plurality of partition arms are an integral structure; alternatively, the plurality of partition arms are of a split structure independent of each other.

According to an aspect of the embodiments of the present invention, the short-circuit prevention device further includes a mounting seat including a supporting member and a guiding member which are connected to each other, the insulating protection member is provided in the guiding member, and the at least one partition arm is movably connected to the guiding member in a length direction.

According to an aspect of an embodiment of the present invention, the guide member includes a guide rod extending in a length direction, the guide rod penetrating the insulation protection member; the number of the guide rods is one, and the cross section of each guide rod is polygonal along the length direction; or the number of the guide rods is more than two, the guide rods are arranged at intervals in the height direction, and the cross section of each guide rod is circular, elliptical or polygonal along the length direction.

According to an aspect of an embodiment of the present invention, the support member includes an adaptor, and the guide member is provided with the adaptor at both ends of the length thereof, respectively; the adapter is an adsorption block with magnetic adsorption capacity, a connecting hole is formed in the adsorption block, and the axial direction of the connecting hole is intersected with the length direction; or the adapter is provided with a first plate body and a second plate body which are arranged in an intersecting manner, and the first plate body is connected with the guide part.

According to the utility model discloses an aspect, prevent that short circuit device still includes the support frame, is provided with the locating pin on the support frame, and the axial and the length direction of locating pin are crossing, and the support frame can be dismantled with at least one supporting component's adaptor and be connected.

On the other hand, according to the utility model discloses the embodiment provides an assembly jig, include: the clamp comprises a clamp body and the short circuit prevention device, wherein the short circuit prevention device is connected to the clamp body; wherein, the number of the short-circuit prevention devices is one; or the number of the short-circuit prevention devices is more than two, wherein two short-circuit prevention devices are arranged at intervals in the width direction and/or two short-circuit prevention devices are butted with each other in the length direction.

According to the utility model discloses in another aspect of the embodiment, assembly jig further includes the top of pushing away piece, and the top of pushing away piece is connected in the anchor clamps body and can support and lean on in preventing the short circuit device to the restriction prevents that the short circuit device moves along length direction.

According to the short-circuit prevention device and the assembly jig provided by the embodiment of the utility model, the short-circuit prevention device comprises an insulating protection piece, since the insulation protection member includes the plurality of partition arms and the receiving groove is formed between adjacent two partition arms, while the side wall of the accommodating groove extends to at least one end face in the height direction of the insulating protection member and one of the end faces in the width direction of the insulating protection member, so that when the short-circuit prevention device is applied to an assembly jig and a plurality of secondary batteries are assembled into a group, the tab of each secondary battery can be placed in one of the receiving grooves, and then make two adjacent secondary battery's utmost point ear separate each other through separating the arm, can effectually avoid a plurality of secondary battery to cause the short circuit or discharge because of the utmost point ear contact between two adjacent secondary battery when in groups, guarantee safety in groups, and it is efficient to be in groups, and the uniformity to secondary battery's utmost point ear insulation treatment is good simultaneously.

Drawings

Features, advantages and technical effects of exemplary embodiments of the present invention will be described below with reference to the accompanying drawings.

Fig. 1 is a schematic overall structure diagram of an assembly jig according to an embodiment of the present invention;

fig. 2 is a schematic structural diagram of a short-circuit prevention device according to an embodiment of the present invention;

fig. 3 is a top view of a divider arm according to an embodiment of the present invention;

figure 4 is a side view of a divider arm according to an embodiment of the present invention;

figure 5 is a side view of a divider arm according to another embodiment of the present invention;

fig. 6 is a schematic structural diagram of a mounting seat according to an embodiment of the present invention;

fig. 7 is a use state diagram of the assembly jig according to the embodiment of the present invention.

Wherein:

100-assembling a fixture;

1-short circuit prevention means;

10-an insulating shield; 110-a separation arm; 110 a-a stationary part; 110 b-cantilever part; 120-accommodating grooves;

20-a mounting seat; 210-a support member; 211-an adaptor; 211 a-connection hole; 211 b-a first plate body; 211 c-a second plate body; 220-a guide member; 220 a-a guide rod;

30-a support frame; 310-a positioning pin;

2-a clamp body; 201-a pushing structure; 201 a-telescoping member; 201 b-a push plate; 202-a base;

3-a push top part;

200-a secondary battery;

x-length direction; y-height direction; z-width direction.

In the drawings, like parts are provided with like reference numerals. The figures are not drawn to scale.

Detailed Description

Features and exemplary embodiments of various aspects of the present invention will be described in detail below. In the following detailed description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. It will be apparent, however, to one skilled in the art that the present invention may be practiced without some of these specific details. The following description of the embodiments is merely intended to provide a better understanding of the invention by illustrating examples of the invention. In the drawings and the following description, at least some well-known structures and techniques have not been shown in detail in order to avoid unnecessarily obscuring the present invention; also, the dimensions of some of the structures may be exaggerated for clarity. Furthermore, the described features, structures, or characteristics may be combined in any suitable manner in one or more embodiments.

The directional words appearing in the following description are directions shown in the drawings, and do not limit the specific structure of the short-circuit preventing device and the assembling jig of the present invention. In the description of the present invention, it should also be noted that, unless otherwise explicitly specified or limited, the terms "mounted" and "connected" are to be interpreted broadly, e.g., as either a fixed connection, a removable connection, or an integral connection; can be directly connected or indirectly connected. The specific meaning of the above terms in the present invention can be understood as the case may be, by those of ordinary skill in the art.

For better understanding of the present invention, the short circuit prevention device and the assembly jig according to the embodiment of the present invention will be described in detail with reference to fig. 1 to 7.

Referring to fig. 1, fig. 1 is a schematic diagram illustrating an overall structure of an assembly fixture 100 according to an embodiment of the present invention. The embodiment of the utility model provides an assembly jig 100, include anchor clamps body 2 and prevent short-circuit device 1, prevent that short-circuit device 1 connects in anchor clamps body 2. The fixture body 2 may include a base 202 and a pushing structure 201 disposed on the base 202, the base 202 may be a planar plate structure, the pushing structure 201 may include a pushing plate 201b and a telescopic component 201a capable of pushing the pushing plate 201b to move, and the pushing structure 201 may be configured to clamp and fix the plurality of secondary batteries 200.

The short-circuit prevention device 1 can be partially connected to the base 202 of the fixture body 2 and/or partially connected to the pushing structure 201, and by means of the short-circuit prevention device 1, when a plurality of secondary batteries 200 are assembled into a group through the assembling fixture 100, the tabs of the secondary batteries 200 can be effectively prevented from contacting and being short-circuited in the group, the grouping efficiency is high, and the consistency of tab insulation treatment of the secondary batteries 200 is good.

For better understanding of the short-circuit prevention device 1 provided by the embodiment of the present invention, the short-circuit prevention device 1 provided by the embodiment of the present invention will be described in detail below with reference to fig. 2 to 6.

Referring to fig. 2, fig. 2 shows a schematic structural diagram of the short-circuit prevention device 1 according to the embodiment of the present invention. The embodiment of the utility model provides a prevent short circuit device 1 can produce alone and sell as independent component, of course, also can be used for assembly fixture 100 of above-mentioned embodiment to regard as assembly fixture 100 partly. As shown in fig. 2, the short-circuit prevention device 1 may include an insulation guard 10, the insulation guard 10 may be a bar structure as a whole, the insulation guard 10 includes a plurality of partition arms 110, and the plurality of partition arms 110 are sequentially arranged in a length direction X of the insulation guard 10. A receiving groove 120 is formed between two adjacent separating arms 110, a side wall of the receiving groove 120 extends to at least one end surface of the insulating protection member 10 in the height direction Y, and a side wall of the receiving groove 120 extends to one end surface of the insulating protection member 10 in the width direction Z.

By providing the insulation protection member 10 and limiting it to adopt the above-described structure, when the assembly jig 100 is applied to the short circuit prevention apparatus 1, the tabs of the secondary batteries 200 may be placed in the corresponding receiving grooves 120, so that the tabs of the adjacent secondary batteries 200 are separated by the separation arms 110 of the insulation protection member 10, thereby preventing the occurrence of a short circuit phenomenon.

Referring to fig. 2 to 5, fig. 3 is a plan view of a partition arm 110 according to an embodiment of the present invention, fig. 4 is a side view of the partition arm 110 according to an embodiment of the present invention, and fig. 5 is a side view of the partition arm 110 according to another embodiment of the present invention.

As an alternative embodiment, the partition arms 110 include fixing portions 110a and cantilever portions 110b that are sequentially disposed and connected to each other along the width direction Z of the insulation protection member 10, the fixing portions 110a of two adjacent partition arms 110 are butted against each other and the cantilever portions 110b are at least partially spaced from each other along the length direction X of the insulation protection member 10, and the receiving groove 120 is formed between the cantilever portions 110b of two adjacent partition arms 110. The partition arm 110 is configured as described above, and can facilitate formation of the receiving groove 120.

Alternatively, each of the separation arms 110 may have a substantially plate-shaped structure, which is easy to manufacture and ensures a separation between the tabs of the adjacent two secondary batteries 200.

Alternatively, each of the separating arms 110 may be made of an insulating material, and in some other examples, an insulating layer, such as an adhesive rubber layer, a nylon layer, or the like, may be attached to a surface of the separating arm 110 surrounding the receiving groove 120 to better prevent the occurrence of a short circuit phenomenon when the secondary batteries 200 are grouped, and tabs with different thicknesses may also be adapted by utilizing the deformability of the insulating layer.

In some optional examples, in two adjacent partition arms 110, at least one of the fixing portions 110a has a larger dimension in the longitudinal direction X than the cantilever portion 110b, and the receiving groove 120 penetrates in the height direction Y. Through the above arrangement, the formation of the accommodating groove 120 can be facilitated, and meanwhile, the secondary battery 200 can be conveniently assembled in a group, and the tabs of the secondary battery 200 can be simply and quickly inserted and accommodated in the accommodating groove 120, so that the grouping efficiency is improved.

Optionally, in order to better meet the molding requirement of the receiving groove 120, as shown in fig. 4, at least one of the partition arms 110 is provided with a concave portion on both sides in the length direction X, so that the size of the fixing portion 110a of at least one of the two adjacent partition arms 110 in the length direction X is larger than the size of the cantilever portion 110b in the length direction X. Of course, the form of the partition arm 110 shown in fig. 4 is only an alternative embodiment, and in some other examples, as shown in fig. 5, at least one partition arm 110 may be provided with a concave portion on one side in the length direction X, which also satisfies the requirement of forming the receiving groove 120.

In particular embodiments, all of the divider arms 110 of insulation shield 10 may be configured as shown in fig. 4 or 5, respectively. Of course, in some other examples, at least a component number of the arms 110 of all of the arms 110 of insulation shield 10 may take the form shown in fig. 4, and at least a component number of the arms 110 take the form shown in fig. 5.

For example, in some examples, the two opposite separating arms 110 at the outermost sides in the length direction X may adopt the structural form shown in fig. 5, and the remaining number of separating arms 110 all adopt the structural form shown in fig. 4, so that the requirement of separating adjacent tabs can be better satisfied, and the occurrence of a short circuit phenomenon when the secondary batteries 200 are grouped can be prevented.

As an alternative embodiment, the plurality of separation arms 110 of the insulating member may be an integrated structure, which not only can satisfy the requirement of preventing short circuit of the plurality of secondary batteries 200 when being grouped, but also can make the short circuit preventing device 1 easy to transport as a whole and convenient to mount and dismount on the jig body 2.

Of course, in some other examples, the plurality of partition arms 110 may be separate structures independent of each other. The plurality of separation arms 110 of the insulation protection member 10 are of a split structure, which is more convenient for assembling the secondary batteries 200 when the secondary batteries are grouped, and the distance between two adjacent separation arms 110 in the length direction X can be flexibly adjusted according to different types or different thicknesses of tabs, thereby improving the application range of the insulation protection member 10.

Referring to fig. 6, fig. 6 is a schematic structural diagram of a mounting base 20 according to an embodiment of the present invention. In order to better ensure the connection between the insulating protection member 10 and the jig body 2 and improve the grouping efficiency and the grouping safety of the plurality of secondary batteries 200, as an alternative embodiment, the short-circuit prevention device 1 further includes a mounting seat 20, the mounting seat 20 includes a supporting member 210 and a guide member 220 connected to each other, the insulating protection member 10 is disposed on the guide member 220, and the at least one separation arm 110 is movably connected to the guide member 220 in the length direction X.

Through the above arrangement, when the short-circuit prevention device 1 is applied to the assembly fixture 100, the short-circuit prevention device 1 can be connected with the fixture body 2 through the mounting seat 20, and the short-circuit prevention device 1 can be quickly assembled and disassembled. Since the insulation protector 10 is disposed on the guide member 220, the at least one separation arm 110 is movably connected to the guide member 220 in the length direction X, so that the position of the at least one separation arm 110 can be adjusted in the length direction X, grouping of the secondary batteries is facilitated, and the requirement for separation of the tabs of the secondary batteries 200 is better ensured.

As an alternative embodiment, each of the separation arms 110 included in the insulation protection member 10 may be movably connected to the guide member 220, and by the above arrangement, when the short-circuit prevention device 1 is applied to the assembly jig 100 and a plurality of secondary batteries 200 are grouped, all the separation arms 110 may be slid to one end portion of the guide member 220 in the length direction X, then the first separation arm 110 located at the outermost side is moved to a predetermined position, the first secondary battery 200 is placed with its tab abutting against the cantilever portion 110b of the first separation arm 110, the second separation arm 110 located near the first separation arm 110 is slid to abut against the first separation arm 110 and by clamping the tab of the first secondary battery 200, and by the above manner, the remaining secondary batteries 200 are sequentially placed and the corresponding separation arms 110 are slid, not only the tabs of the adjacent secondary batteries 200 can be separated from each other, the problem of contact short circuit of the secondary battery 200 is prevented, and meanwhile, the problem of difficult isolation caused by the difference of the pole lugs of different secondary batteries 200 can be effectively solved.

In some alternative embodiments, the guiding member 220 includes a guiding rod 220a extending along the length direction X, and the guiding rod 220a penetrates through the insulation protection member 10, so that the separation arms 110 of the insulation protection member 10 can slide relative to the guiding rod 220a in the length direction X, thereby ensuring the separation effect on the tabs of the adjacent secondary batteries 200.

In order to facilitate the engagement with the guide rods 220a, the partition arms 110 are provided with mounting holes having the same number and shape as the guide rods 220 a.

Optionally, the number of the guide rods 220a is two, the two guide rods 220a are arranged at intervals in the height direction Y, and along the length direction X, the cross section of the guide rod 220a is circular, elliptical or polygonal, and when the cross section is polygonal, the cross section may be regular polygonal, or may be irregular polygonal, as long as the sliding guiding effect on the partition arm 110 can be satisfied.

It is understood that the number of the guiding rods 220a is two, which is an alternative embodiment, in some other examples, the number of the guiding rods 220a may also be more than two, for example, in some alternative examples, the number may also be three, four or even more, and the plurality of guiding rods 220a may also be arranged at intervals in the height direction Y, and the cross section of the guiding rod 220a along the length direction X is circular, elliptical or polygonal. The cross-sectional shapes of the guide rods 220a may be the same or different, for example, the cross-section of one of the guide rods 220a may be circular, and the cross-section of the rest or all of the guide rods 220a may be polygonal, etc.

Of course, in some other examples, the number of the guide rods 220a may also be one, and when the number of the guide rods 220a is one, the cross section of the guide rod 220a is polygonal along the length direction X, may be a regular polygon, and may also be an irregular polygon. Even if the number of the guide rods 220a is one, the guide function of each partition arm 110 in the length direction X can be satisfied, and the rotational freedom of each partition arm 110 can be limited, so that the partition arm 110 is prevented from rotating relative to the guide rods 220a, and the separation effect of the tabs of the adjacent secondary batteries 200 can be ensured.

As an alternative embodiment, the supporting member 210 includes adapters 211, and the guiding member 220 is provided with the adapters 211 at both ends in the length direction X, respectively. With the above arrangement, the guide member 220 and the insulating protector 10 on the guide member 220 can be connected to the jig body 2 through the adaptor 211.

Optionally, the adaptor 211 may be an adsorption block having magnetic adsorption capability, the adsorption block is provided with a connection hole 211a, an axial direction of the connection hole 211a intersects with the length direction X, or the adaptor 211 may also have a first plate body 211b and a second plate body 211c intersecting with each other, and the first plate body 211b is connected with the guide member 220.

In some alternative examples, as shown in fig. 2 and 4, the adaptor 211 at one end of the guiding component 220 in the length direction X may be in the form of an adsorption block, and the adaptor 211 at the other end may be in the form of a first plate body 211b and a second plate body 211c arranged in an intersecting manner, so that the guiding component 220 and the insulating protection member 10 on the guiding component 220 may be connected to the fixture body 2 through the adaptor 211, and at least one end of the guiding component and the fixture body 2 may be detachably connected, which is more beneficial to the assembly and disassembly and recycling of the short circuit prevention device 1.

In specific implementation, when the adaptor 211 is in the form of an adsorption block, the adaptor 211 may be made of a magnet or a block structure doped with a magnet component, the number of the connection holes 211a formed in the adaptor 211 may be set as required, and may be two or more, the two or more connection holes 211a are formed at intervals in the height direction Y, and by providing the connection holes 211a, the adaptor 211 may be further connected to the fixture body 2 through a fastening member, so that the insulation protection member 10 having more partition arms 110 may be supported, and a supporting effect of the insulation protection member 10 may be ensured. Meanwhile, the adaptor 211 is provided with insertion holes which extend along the length direction X and have the same number and shape as the guide rods 220a, so as to be connected with the corresponding guide rods 220a in an insertion manner.

Optionally, when the adaptor 211 has a first plate body 211b and a second plate body 211c that are disposed in an intersecting manner, the first plate body 211b is provided with a second plate body 211c that extends along the length direction X and has a same number of insertion holes as the number of the guide rods 220a and a shape matching the same, for direct or indirect connection with the jig body 2.

Optionally, the short-circuit prevention device 1 further includes a support frame 30, the support frame 30 is provided with a positioning pin 310, an axial direction of the positioning pin 310 intersects with the length direction X, and the support frame 30 is detachably connected to the adaptor 211 of the at least one support member 210. By providing the support frame 30, the insulating protection member 10 can be supported to a predetermined height, and the separation effect of the tabs of the plurality of secondary batteries 200 to be grouped can be better ensured. Meanwhile, the support frame 30 can be arranged on the fixture body 2 and detachably connected with the fixture body 2 through fasteners and the like, so that the repeated utilization rate of the short-circuit prevention device 1 is further ensured. And the support frame 30 can be connected with at least one adaptor 211 through its support part or positioning pin 310, that is, it can simultaneously support at least two support parts 210 and the insulation protection member 10 on each support part 210, and can reduce the space occupation rate of the whole short-circuit prevention device 1 on the basis of ensuring that the requirement of insulation protection between the tabs of more secondary batteries 200 is satisfied.

To sum up, the short circuit prevention apparatus 1 according to the embodiment of the present invention includes the insulation protection member 10, and the insulation protection member 10 is defined to include the plurality of separation arms 110, and the receiving groove 120 is formed between two adjacent separation arms 110, and the side wall of the receiving groove 120 extends to at least one end surface of the height direction Y of the insulation protection member 10 and one end surface of the width direction Z of the insulation protection member 10, so that when the short circuit prevention apparatus 1 is applied to the assembly jig 100 and the plurality of secondary batteries 200 are assembled into a group, the tab of each secondary battery 200 can be placed in one of the receiving grooves 120, and further the tabs of two adjacent secondary batteries 200 can be separated from each other by the separation arms 110, thereby effectively avoiding the short circuit or discharge caused by the tab contact between two adjacent secondary batteries 200 when the plurality of secondary batteries 200 are assembled into a group, and ensuring the safety of the group, and the grouping efficiency is high, and each tab is separated by the separation arm 110, so that the consistency of the tab insulation treatment of the secondary battery 200 is good.

Optionally, the number of the short-circuit prevention devices 1 included in the assembly fixture 100 may be one, and of course, the number of the short-circuit prevention devices 1 may also be two or more, where two of the short-circuit prevention devices 1 are disposed at intervals in the width direction Z, and/or where two of the short-circuit prevention devices 1 are butted against each other in the length direction X. To meet the grouping requirements of the secondary batteries 200 of different models.

Referring to fig. 1 and 7 together, fig. 7 shows a usage state diagram of the assembly fixture 100 according to the embodiment of the present invention, in this example, at least two short-circuit prevention devices 1 are arranged at intervals in the width direction Z to protect the tabs from being drawn out from two opposite end surfaces of the secondary battery 200, so as to avoid the occurrence of short-circuit between the tabs.

Optionally, the assembly fixture 100 further comprises a knockout 3, the knockout 3 being connected to the fixture body 2 and being capable of abutting against the at least one short circuit prevention device 1 to limit movement of the short circuit prevention device 1 in the length direction X.

In specific implementation, the ejection part 3 may be connected to the ejection structure 201 of the fixture body 2, and may move along with the ejection plate 201b of the ejection structure 201, and may specifically abut against the separation arm 110 of at least one short-circuit prevention device 1, so as to mainly limit the separation arm 110 of the short-circuit prevention device 1 to move in the length direction X, and ensure stable clamping of the tabs of the secondary batteries 200 during grouping.

Therefore, the assembly fixture 100 provided by the embodiment of the invention comprises the short-circuit prevention device 1 of each embodiment, so that when a plurality of secondary batteries 200 are grouped, short circuit or discharge caused by contact of the tabs between two adjacent secondary batteries 200 can be avoided, the grouping safety is ensured, the grouping efficiency is high, the consistency of insulation treatment on the tabs of the secondary batteries 200 is good, and the assembly fixture 100 is easy to popularize and apply.

While the invention has been described with reference to a preferred embodiment, various modifications may be made and equivalents may be substituted for elements thereof without departing from the scope of the invention. In particular, the technical features mentioned in the embodiments can be combined in any way as long as there is no structural conflict. The present invention is not limited to the particular embodiments disclosed herein, but encompasses all technical solutions falling within the scope of the claims.

Claims

1. An anti-short circuit device, comprising:

the insulation protection part is a strip-shaped structure body integrally and comprises a plurality of separation arms which are sequentially arranged in the length direction of the insulation protection part;

a receiving groove is formed between two adjacent partition arms, a side wall of the receiving groove extends to at least one end surface in the height direction of the insulating protection member, and the side wall of the receiving groove extends to one end surface in the width direction of the insulating protection member.

2. The short-circuit prevention device according to claim 1, wherein the partition arm includes a fixing portion and a cantilever portion which are successively arranged in the width direction and connected to each other;

along the length direction, the fixing parts of two adjacent separating arms are mutually butted, the cantilever parts are at least partially mutually spaced, and the accommodating groove is formed between the cantilever parts of two adjacent separating arms.

3. The short-circuit prevention device according to claim 2, wherein the dimension of the fixing portion of at least one of the two adjacent partition arms in the longitudinal direction is larger than the dimension of the cantilever portion in the longitudinal direction, and the receiving groove penetrates in the height direction.

4. The short-circuit prevention device of claim 1, wherein a plurality of the separator arms are of a unitary construction; alternatively, a plurality of the partition arms are of a split structure independent of each other.

5. The short-circuit prevention device according to any one of claims 1 to 4, further comprising a mounting seat including a support member and a guide member connected to each other, wherein the insulation shield is provided to the guide member, and wherein at least one of the separation arms is movably connected to the guide member in the length direction.

6. The short circuit prevention device of claim 5, wherein the guide member comprises a guide rod extending in the length direction, the guide rod penetrating the insulation shield;

the number of the guide rods is one, and the cross section of each guide rod is polygonal along the length direction;

or the number of the guide rods is more than two, the guide rods are arranged in the height direction at intervals, and the cross section of each guide rod is circular, elliptical or polygonal along the length direction.

7. The short-circuit prevention device according to claim 5, wherein the support member includes adapters, and the guide members are provided with the adapters at both ends in the length direction, respectively;

the adapter is an adsorption block with magnetic adsorption capacity, a connecting hole is formed in the adsorption block, and the axial direction of the connecting hole is intersected with the length direction; or the adaptor is provided with a first plate body and a second plate body which are arranged in an intersecting manner, and the first plate body is connected with the guide part.

8. The short-circuit prevention device of claim 7, further comprising a support frame, wherein a positioning pin is disposed on the support frame, an axial direction of the positioning pin intersects with the length direction, and the support frame is detachably connected to the adaptor of at least one of the support members.

9. An assembly jig, comprising: a clamp body and a short-circuit prevention device as claimed in any one of claims 1 to 8, the short-circuit prevention device being connected to the clamp body;

wherein the number of the short-circuit prevention devices is one;

or, the number of the short-circuit prevention devices is more than two, wherein two of the short-circuit prevention devices are arranged at intervals in the width direction, and/or two of the short-circuit prevention devices are butted with each other in the length direction.

10. An assembly jig according to claim 9 further comprising a push-top member connected to the jig body and capable of abutting against the short circuit prevention device to restrict movement of the short circuit prevention device in the length direction.