CN217445573U

CN217445573U - Lithium battery protection plate capable of passing large current

Info

Publication number: CN217445573U
Application number: CN202220800872.6U
Authority: CN
Inventors: 冯梓洋; 刁应君; 曾伍军; 付佳彬
Original assignee: Shenzhen Mingtang New Energy Technology Co ltd
Current assignee: Shenzhen Mingtang New Energy Technology Co ltd
Priority date: 2022-04-07
Filing date: 2022-04-07
Publication date: 2022-09-16
Anticipated expiration: 2032-04-07

Abstract

The utility model provides a lithium battery protection shield of accessible heavy current, including protection shield main part and electrically conductive connecting piece, be equipped with the circuit in the protection shield main part, electrically conductive connecting piece includes basal portion and participates in and the connecting portion of connecting the basal portion, basal portion and connecting portion are the slice, participate in and protrude in the basal portion surface on basal portion thickness direction, be equipped with the jack that corresponds to participating in the protection shield main part, correspond the first pad of participating in and the second pad of corresponding basal portion, participate in and insert the jack, the basal portion laminating is on the second pad, participate in through welded connection first pad, the basal portion passes through welded connection second pad, realize the electrically conductive connection of electrically conductive connecting piece and circuit on the protection shield main part; the connecting part is provided with a connecting structure for conducting connection with an external circuit. The utility model discloses a lithium battery protection plate of accessible heavy current simple structure utilizes in the actual production, and simple to operate is reliable, maintains simple convenient, has removed from and has used many wires and protection shield welded complex technology.

Description

Lithium battery protection plate capable of passing large current

Technical Field

The utility model belongs to the technical field of the lithium cell protection shield and specifically relates to a lithium cell protection shield of accessible heavy current is related to.

Background

With the continuous development of the lithium BATTERY power market, a high-current lithium BATTERY BMS (Battery MANAGEMENT SYSTEM; BATTERY management system) protection board is more and more in demand. And a protective plate, namely a circuit board for protecting the battery. At present, the connection of a large-current lithium battery protection board and high-power load equipment needs to be realized through large current, and one wire cannot be realized, so that generally, a plurality of wires are welded and connected with the protection board and the high-power load equipment, and the plurality of wires share the current.

SUMMERY OF THE UTILITY MODEL

The to-be-solved technical problem of the utility model lies in, to the above-mentioned defect in the correlation technique, provide a lithium battery protection shield of accessible heavy current.

The utility model provides a technical scheme that its technical problem adopted includes: the lithium battery protection board capable of passing large current comprises a protection board main body and a conductive connecting piece, wherein a circuit is arranged on the protection board main body, the conductive connecting piece comprises a base part, a pin and a connecting part, the pin and the connecting part are connected with the base part, the base part and the connecting part are in a sheet shape, the pin protrudes out of the surface of the base part in the thickness direction of the base part, a jack corresponding to the pin, a first bonding pad corresponding to the pin and a second bonding pad corresponding to the base part are arranged on the protection board main body, the pin is inserted into the jack, the base part is attached to the second bonding pad, the pin is connected with the first bonding pad through welding, the base part is connected with the second bonding pad through welding, and the conductive connecting piece is conductively connected with the circuit on the protection board main body; the connecting part is provided with a connecting structure which is used for being in conductive connection with the external circuit.

Preferably, a dimension of the base in a first direction is larger than a dimension in a second direction, the first direction and the second direction being perpendicular to a thickness direction of the base.

Preferably, the base portion has a dimension in the first direction larger than a dimension of the connecting portion in the first direction, and the connecting portion protrudes in the second direction.

Preferably, the protection plate main body is provided with a plurality of switch tubes arranged along the first direction, and the conductive connecting member is connected with the switch tubes through the circuit on the protection plate main body.

Preferably, the connecting portion is coplanar with the base portion; or the connecting part comprises a first part perpendicular to the base part and a second part perpendicular to the first part, and the connecting structure is arranged on the second part.

Preferably, the base, the connection part, and the pin are bent from a sheet body.

Preferably, the pins are provided at the base edge.

Preferably, the conductive connector comprises at least one pin provided at one side of the base.

Preferably, the conductive connector includes at least two of the pins disposed on opposite or adjacent sides of the base.

Preferably, the fixing part arranged on the connecting part passes through the conductive connecting terminal of the external circuit through a screw, penetrates through the hole of the connecting structure and is connected and locked with the threaded hole, so that the conductive connecting terminal of the external circuit is fixed.

Implement the technical scheme of the utility model, following beneficial effect has at least: the utility model discloses a design of the lithium battery protection board's of accessible heavy current electrically conductive connecting piece can realize that protection shield main part and external circuit's heavy current passes through, the sectional area decision of electrically conductive connecting piece, because the slice design of basal portion and connecting portion to and the design of being connected with the protection shield main part, so the electric current size that bears as required usually changes the width and the thickness of basal portion and/or connecting portion, the function of many wires as background art is realized to an electrically conductive connecting piece casing. The utility model discloses a lithium battery protection plate of accessible heavy current simple structure utilizes in the actual production, and simple to operate is reliable, maintains simple convenient, has removed from and has used many wires and protection shield welded complex technology.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for the embodiments or the prior art descriptions will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without inventive labor.

Fig. 1 is a perspective view of a lithium battery protection plate capable of passing a large current according to an embodiment of the present invention.

Fig. 2 is a partially enlarged view of a portion a of fig. 1.

Fig. 3 is an exploded view of the lithium battery protection plate of fig. 1 through which a large current can be passed.

Fig. 4 is a perspective view of the lithium battery protection plate of fig. 1 through which a large current can be passed.

Fig. 5 is a partially enlarged view of a portion B of fig. 4.

Fig. 6 is an exploded view of the lithium battery protection plate of fig. 1 through which a large current can be passed.

Fig. 7 is a schematic view of the lithium battery protection board capable of passing a large current of fig. 1 connected with a conductive terminal of an external circuit through a conductive connector.

Fig. 8 is a perspective view of a lithium battery protection plate capable of passing a large current according to another embodiment of the present invention.

Fig. 9 is an exploded view of the lithium battery protection plate of fig. 9 through which a large current can be passed.

Fig. 10 is an exploded view of the lithium battery protection plate of fig. 9 through which a large current can be passed.

Fig. 11 is a perspective view of a conductive connection member of a lithium battery protection plate capable of passing a large current according to still another embodiment of the present invention.

Fig. 12 is a perspective view of the conductive connector of fig. 11.

The reference numerals in the figures denote: the protection board comprises a protection board body 1, an inserting hole 11, a first pad 12, a second pad 13, a switch tube 14, a conductive connecting piece 2, a base 21, a pin 22, a connecting part 23, a first part 231, a second part 232, a connecting structure 24, a fixing part 3, a screw 4, a conductive connecting terminal 5 of an external circuit, a first direction 61 and a second direction 62.

Detailed Description

In order to clearly understand the technical features, objects, and effects of the present invention, embodiments of the present invention will be described in detail with reference to the accompanying drawings. It is to be understood that, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," "disposed," and the like, if used herein, are intended to be inclusive, e.g., that they may be fixedly connected, detachably connected, or integrally formed; either directly or indirectly through intervening media, either internally or in any other relationship. When an element is referred to as being "on" or "under" another element, it can be "directly" or "indirectly" on the other element or intervening elements may also be present. If the terms "first", "second", etc. are used herein only for convenience in describing the present technical solution, they are not to be taken as indicating or implying relative importance or implicitly indicating the number of technical features indicated, whereby a feature defined as "first", "second", etc. may explicitly or implicitly include one or more of such features. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

In the following description, for purposes of explanation and not limitation, specific details are set forth, such as particular system structures, techniques, etc. in order to provide a thorough understanding of the embodiments of the invention. It will be apparent, however, to one skilled in the art that the present invention may be practiced in other embodiments that depart from these specific details. In other instances, detailed descriptions of well-known systems, devices, circuits, and methods are omitted so as not to obscure the description of the present invention with unnecessary detail.

Referring to fig. 1 to 7, the lithium battery protection board capable of passing large current in an embodiment of the present invention includes a protection board main body 1 and a conductive connecting member 2, a circuit is disposed on the protection board main body 1, the conductive connecting member 2 includes a base portion 21, and a pin 22 and a connecting portion 23 connecting the base portion 21, the base portion 21 and the connecting portion 23 are in a sheet shape, the pin 22 protrudes out of the surface of the base portion 21 in the thickness direction of the base portion 21, a socket 11 corresponding to the pin 22, a first pad 12 corresponding to the pin 22, and a second pad 13 corresponding to the base portion 21 are disposed on the protection board main body 1, the pin 22 is inserted into the socket 11, the base portion 21 is attached to the second pad 13, the pin 22 is connected to the first pad 12 by welding, the base portion 21 is connected to the second pad 13 by welding, and the conductive connection between the conductive connecting member 2 and the circuit on the protection board main body 1 is achieved; the connection portion 23 is provided with a connection structure 24 for electrically connecting to an external circuit. The pins 22 are used for positioning the base 21 on the protective plate body 1, and the base 21 and the pins 22 are used for making a connection with the circuit on the protective plate body 1, and the pins 22 are used for the conductive connecting member 2 for electrically connecting with an external circuit through the connecting structure 24.

The utility model discloses a design of the lithium battery protection shield's of accessible heavy current electrically conductive connecting piece 2 can realize that protection shield main part 1 passes through with external circuit's heavy current, electrically conductive connecting piece 2's sectional area decision, because the slice design of basal portion 21 and connecting portion 23 to and the design of being connected with protection shield main part 1, so the electric current size that bears as required generally changes the width and the thickness of basal portion 21 and/or connecting portion 23, the function of many wires as background art is realized to a electrically conductive connecting piece 2 casing. The utility model discloses a lithium battery protection plate of accessible heavy current simple structure utilizes in the actual production, and simple to operate is reliable, maintains simple convenient, has removed from and has used many wires and protection shield welded complex technology.

Preferably, the pins 22 protrude in the thickness direction of the base 21, perpendicular to the base 21. The connecting portion 23 is provided on the base portion 21 side.

Wherein, the conductive connecting piece 2 can be made of materials such as brass, red copper, phosphor copper and the like, and the surface is electroplated with oxidation resistance.

Preferably, the dimension of the base 21 in the first direction 61 is larger than the dimension in the second direction 62, and the first direction 61 and the second direction 62 are perpendicular to the thickness direction of the base 21.

Preferably, the size of the base portion 21 in the first direction 61 is larger than the size of the connection portion 23 in the first direction 61, and the connection portion 23 protrudes out of the protection plate main body 1 in the second direction 62 so as to be connected with an external circuit.

Preferably, the protective plate main body 1 is provided with a plurality of switch tubes 14 arranged along the first direction 61 and connected with the circuit on the protective plate main body 1, the conductive connecting member 2 is connected with the switch tubes 14 through the circuit on the protective plate main body 1, the size of the base portion 21 in the first direction 61 corresponds to the arrangement of the switch tubes 14 in the first direction 61, so as to realize the connection with the plurality of switch tubes 14, and the larger the number of the switch tubes 14 in the first direction 61, the larger the size of the base portion 21 of the conductive connecting member 2 in the first direction 61. The switching tube 14 may be a MOS tube.

As in fig. 1-10, the connecting portion 23 is coplanar with the base portion 21; or as shown in fig. 11-12, the connecting portion 23 includes a first portion 231 perpendicular to the base portion 21 and a second portion 232 perpendicular to the first portion 231, the connecting structure 24 being provided on the second portion 232.

Preferably, the base 21, the connecting portion 23 and the pins 22 are integrally formed, bent from a sheet of metal.

Preferably, the pins 22 are provided at the edge of the base 21.

In some embodiments, as shown in fig. 8-10, the conductive connector 2 includes at least one pin 22 disposed on one side of the base 21. In other embodiments, such as those shown in fig. 1-7 and 11-12, the conductive connector 2 includes at least two prongs 22 disposed on opposite or adjacent sides of the base 21. When the number of the pins 22 is at least two, the positioning of the conductive connecting member 2 on the protector plate body 1 is achieved by the pins 22 cooperating with the insertion holes 11.

Preferably, the first pads 12 and the second pads 13 are respectively provided on opposite sides of the protection board body 1, and solder paste for soldering is filled into the insertion holes 11 to fix the pins 22. The one side at the basal portion 21 place of protection shield main part 1, basal portion 21 is fixed through the reflow soldering technology paster, and the one side opposite with basal portion 21 place of protection shield main part 1 is crossed the stove through the wave-soldering technology and is filled the solder paste completely to the trompil of protection shield main part 1 and the gap between copper sheet device base pin 22 for copper sheet device and the inseparable body coupling of line board guarantee joint strength.

The function of the pins 22 is:

1. when the conductive connector 2 is mounted on the protective plate main body 1, the pins 22 play a role in positioning and guiding;

2. the pins 22 are inserted into the protection board main body 1 for checking, and are welded by using solder paste to ensure the connection firmness;

3. the larger the number and the size of the pins 22 are, the more the conductive contact area between the conductive connecting piece 2 and the circuit of the protection board main body 1 can be increased, and the cross-sectional area for passing current is increased;

4. the heat dissipation area is increased, and the heat dissipation effect is improved.

This lithium battery protection board of accessible heavy current is equipped with the screw hole including fixed part 3 of establishing on connecting portion 23 on fixed part 3, and connection structure 24 is poroid, and the screw hole corresponds connection structure 24's hole. When the connector is connected with an external circuit, the connector passes through the conductive connecting terminal 5 of the external circuit (such as a high-power load device) through the screw 4, penetrates into the hole of the connecting structure 24 and is connected and locked with the threaded hole, so that the conductive connecting terminal 5 of the external circuit is fixed, the connecting terminal is tightly contacted with the connecting part 23 of the conductive connecting piece 2, the conductive connecting terminal is conducted with the protection board main body 1, the internal resistance is small, and therefore large current can be safely passed. Wherein, the fixing part 3 can directly adopt a nut.

To sum up, the design of the conductive connecting member 2 of the lithium battery protection plate capable of passing large current of the present invention can realize the passing of large current of the protection plate main body 1 and the external circuit, the sectional area of the conductive connecting member 2 is determined, and the width and thickness of the base portion 21 and/or the connecting portion 23 are generally changed according to the magnitude of the current to be carried by the base portion 21 and the connecting portion 23 due to the sheet design of the base portion 21 and the connecting portion 23 and the connecting design of the protection plate main body 1. The utility model discloses a lithium battery protection plate of accessible heavy current simple structure utilizes in the actual production, and simple to operate is reliable, maintains simple facility, has simplified and has used many wires and the 1 welded complicated technology of protection shield main part.

The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications, combinations, and variations may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the scope of the claims of the present invention.

Claims

1. The lithium battery protection plate capable of passing large current is characterized by comprising a protection plate main body (1) and a conductive connecting piece (2), wherein a circuit is arranged on the protection plate main body (1), the conductive connecting piece (2) comprises a base part (21), a pin (22) and a connecting part (23) which are connected with the base part (21), the base part (21) and the connecting part (23) are in a sheet shape, the pin (22) protrudes out of the surface of the base part (21) in the thickness direction of the base part (21), a jack (11) corresponding to the pin (22), a first pad (12) corresponding to the pin (22) and a second pad (13) corresponding to the base part (21) are arranged on the protection plate main body (1), the pin (22) is inserted into the jack (11), and the base part (21) is attached to the second pad (13), the pins (22) are connected with the first pads (12) through welding, the base (21) is connected with the second pads (13) through welding, and the conductive connection piece (2) is conductively connected with the circuit on the protective plate main body (1); the connecting part (23) is provided with a connecting structure (24) which is used for being in conductive connection with the external circuit.

2. A lithium battery protection plate through which a large current can pass according to claim 1, characterized in that a dimension of the base portion (21) in a first direction (61) is larger than a dimension in a second direction (62), the first direction (61) and the second direction (62) being perpendicular to a thickness direction of the base portion (21).

3. A lithium battery protection plate through which a large current can pass according to claim 1, characterized in that the size of the base portion (21) in the first direction (61) is larger than the size of the connection portion (23) in the first direction (61), and the connection portion (23) protrudes in the second direction (62).

4. A lithium battery protection plate capable of passing large current according to any one of claims 2-3, wherein a plurality of switch tubes (14) arranged along the first direction (61) are arranged on the protection plate main body (1), and the conductive connecting member (2) is connected with the switch tubes (14) through the circuit on the protection plate main body (1).

5. A lithium battery protection plate through which a large current can pass according to claim 1, wherein the connection portion (23) is coplanar with the base portion (21); or the connecting portion (23) comprises a first portion (231) perpendicular to the base (21) and a second portion (232) perpendicular to the first portion (231), the connecting structure (24) being provided on the second portion (232).

6. A lithium battery protection plate through which a large current can pass according to claim 1, characterized in that the base portion (21), the connection portion (23) and the pin (22) are bent from a sheet body.

7. A lithium battery protection plate through which a large current can pass according to claim 6, characterized in that the pin (22) is provided at the edge of the base (21).

8. A lithium battery protection plate through which a large current can pass according to claim 7, characterized in that the conductive connector (2) comprises at least one pin (22) provided at one side of the base (21).

9. A lithium battery protection plate through which a large current can pass according to claim 7, characterized in that the conductive connection member (2) comprises at least two pins (22) provided at opposite sides or adjacent sides of the base portion (21).

10. A lithium battery protection plate capable of passing large current according to claim 1, wherein the fixing portion (3) provided on the connecting portion (23) passes through the conductive terminal of the external circuit by a screw (4) and passes through the hole of the connecting structure (24) and is connected and locked with the screw hole, thereby fixing the conductive terminal of the external circuit.