CN218851051U

CN218851051U - Circuit board and battery device

Info

Publication number: CN218851051U
Application number: CN202222983023.1U
Authority: CN
Inventors: 张克泽; 李炜; 周世友
Original assignee: China Lithium Battery Technology Co Ltd
Current assignee: China Lithium Battery Technology Co Ltd
Priority date: 2022-11-09
Filing date: 2022-11-09
Publication date: 2023-04-11
Anticipated expiration: 2032-11-09

Abstract

The utility model relates to a battery technology field provides a circuit board and battery device, and the circuit board includes: the body comprises a first end face and a second end face which are opposite, and the first end face and the second end face are arranged along the length direction of the body; the connector is arranged on the body, and along the length direction of the body, the first end face and the connector are arranged at intervals, and the connector and the second end face are arranged at intervals. The first end face and the second end face of the connector and the body are arranged at equal intervals, so that the connector is located in the middle of the length direction of the body, the connector is prevented from being located at the end of the length direction of the body to influence fixation of a circuit board, a space can be provided for connection of a wiring harness and the connector, the connector is located in the middle of the length direction of the body, the phenomenon of electromagnetic interference between the connector and a high-voltage structure inside a battery device can be avoided, and safety use performance of the circuit board is improved.

Description

Circuit board and battery device

Technical Field

The utility model relates to a battery technology field especially relates to a circuit board and battery device.

Background

In the related art, the battery device includes a circuit board, and the circuit board may include a connector for the lead-out of the wire harness, however, due to the position limitation of the connector, not only is the fixing of the circuit board inconvenient, but also electromagnetic interference may be caused to the internal structure of the battery device.

SUMMERY OF THE UTILITY MODEL

The utility model provides a circuit board and battery device to improve the performance of circuit board.

According to an aspect of the utility model, a circuit board is provided, include:

the body comprises a first end face and a second end face which are opposite, and the first end face and the second end face are arranged along the length direction of the body;

the connector is arranged on the body, and along the length direction of the body, the first end face and the connector are arranged at intervals, and the connector and the second end face are arranged at intervals.

The utility model discloses the circuit board includes body and connector, the connector sets up on the body, through making the connector and the equal interval setting of first terminal surface and the second terminal surface of body, thereby can make the connector be located body length direction's middle part, avoid the connector to be located body length direction's tip and influence the fixed of circuit board, and can provide the space for being connected of pencil and connector, and the connector is located body length direction's middle part, also can avoid connector and the inside high-pressure structure of battery pack electromagnetic interference phenomenon to appear, with this safety in service performance who improves the circuit board.

According to another aspect of the present invention, a battery device is provided, which includes the above circuit board.

The utility model discloses battery device's circuit board includes body and connector, the connector sets up on the body, through making the connector and the equal interval setting of first terminal surface and the second terminal surface of body, thereby can make the connector be located body length direction's middle part, avoid the connector to be located body length direction's tip and influence the fixed of circuit board, and can provide the space for being connected of pencil and connector, and the connector is located body length direction's middle part, also can avoid connector and battery device inside high-pressure structure electromagnetic interference phenomenon to appear, with this safety in service performance who improves battery device.

Drawings

For a better understanding of the present disclosure, reference may be made to the embodiments illustrated in the following drawings. The components in the drawings are not necessarily to scale, and related elements may be omitted in order to emphasize and clearly illustrate the technical features of the present disclosure. In addition, the relevant elements or components may be arranged differently as is known in the art. Further, in the drawings, like reference characters designate the same or similar parts throughout the several views.

Wherein:

FIG. 1 is a schematic illustration of a partial structure of a battery device according to an exemplary embodiment;

FIG. 2 is a schematic diagram illustrating a perspective structure of a circuit board according to an exemplary embodiment;

FIG. 3 is a schematic diagram illustrating another perspective of a circuit board according to an exemplary embodiment;

fig. 4 is a schematic diagram of a circuit board according to another exemplary embodiment.

The reference numerals are illustrated below:

10. a body; 11. a first end face; 12. a second end face; 13. a connecting portion; 14. avoiding the through hole; 20. a connector assembly; 30. a buffer member; 40. a battery pack; 50. a battery case; 60. a fixing plate; 70. a nickel sheet.

Detailed Description

The technical solutions in the exemplary embodiments of the present disclosure will be clearly and completely described below with reference to the drawings in the exemplary embodiments of the present disclosure. The example embodiments described herein are for illustrative purposes only and are not intended to limit the scope of the present disclosure, and it is, therefore, to be understood that various modifications and changes may be made to the example embodiments without departing from the scope of the present disclosure.

In the description of the present disclosure, unless otherwise explicitly specified or limited, the terms "first", "second", and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance; the term "plurality" means two or more; the term "and/or" includes any and all combinations of one or more of the associated listed items. In particular, reference to "the" object or "an" object is also intended to mean one of many such objects possible.

The terms "connected," "secured," and the like are to be construed broadly and encompass, for example, a fixed connection, a removable connection, an integral connection, an electrical connection, or a signal connection; "connected" may be directly connected or indirectly connected through an intermediate. The specific meaning of the above terms in the present disclosure can be understood by those skilled in the art as the case may be.

Further, in the description of the present disclosure, it should be understood that the directional words "upper", "lower", "inner", "outer", etc., which are described in the exemplary embodiments of the present disclosure, are described at the angles shown in the drawings, and should not be construed as limiting the exemplary embodiments of the present disclosure. It will also be understood that, in this context, when an element or feature is referred to as being "on", "under", or "inner", "outer" with respect to another element(s), it can be directly on "," under ", or" inner "," outer "with respect to the other element(s), or indirectly on", "under", or "inner", "outer" with respect to the other element(s) via intervening elements.

An embodiment of the present invention provides a circuit board, please refer to fig. 1 to fig. 4, the circuit board includes: the body 10, the body 10 includes a first end surface 11 and a second end surface 12 opposite to each other, and the first end surface 11 and the second end surface 12 are arranged along the length direction of the body 10; the connector 20 is arranged on the body 10, and the first end face 11 and the connector 20 are arranged at intervals along the length direction of the body 10, and the connector 20 and the second end face 12 are arranged at intervals.

The utility model discloses a circuit board of embodiment includes body 10 and connector 20, connector 20 sets up on body 10, through making connector 20 and the equal interval setting of first terminal surface 11 and the second terminal surface 12 of body 10, thereby can make connector 20 be located body 10 length direction's middle part, avoid connector 20 to be located body 10 length direction's tip and influence the fixed of circuit board, and can provide the space for being connected of pencil and connector 20, and connector 20 is located body 10 length direction's middle part, also can avoid connector 20 and the inside high-pressure structure of battery pack electromagnetic interference phenomenon to appear, with this safety in service performance who improves the circuit board.

It should be noted that the circuit board may be configured to be mounted inside the battery device and connected to the battery to obtain voltage information, temperature information, etc. of the battery, and the connector 20 on the circuit board may be connected to the BMS battery management module through a wire harness to transmit the voltage information, temperature information, etc. In order to facilitate the fixing of the circuit board and the battery device, the connector 20 may be disposed in the middle of the body 10 in the length direction, so that two ends of the connector 20 in the length direction are fixed to the battery device, that is, the connector 20 does not affect the fixing of the body 10. And because the connector 20 is arranged in the middle of the length direction of the body 10, two ends of the length direction of the connector 20 can be used as wiring spaces of the wiring harness, so that the connector 20 and the wiring harness can be conveniently connected, and the wiring harness is prevented from being damaged, and the high-voltage structure inside the battery device is mostly arranged close to the two ends of the length direction of the connector 20, and the connector 20 is arranged in the middle of the length direction of the body 10, so that the problem of electromagnetic interference caused by too close distance between the connector 20 and the high-voltage structure can be avoided.

In one embodiment, the distance between the first end face 11 and the connector 20 is not less than 10mm, and the distance between the connector 20 and the second end face 12 is not less than 10mm, so that the distance between the connector 20 and the first end face 11 can be prevented from being too small, and the distance between the connector 20 and the second end face 12 can be prevented from being too small, so that the space for routing the wiring harness can be increased, the wiring harness can be prevented from being damaged, and the high voltage and the low voltage can be separated from each other, and the electromagnetic interference caused by too close distance between the two can be prevented.

In one embodiment, the number of the connectors 20 is multiple, the plurality of connectors 20 are arranged along the length direction of the body 10, and the two connectors 20 respectively close to the first end surface 11 and the second end surface 12 are symmetrically arranged about the center line of the body 10, so that in the installation and use process of the circuit board, even if the circuit board is installed by rotating 180 degrees, because the two connectors 20 close to the first end surface 11 and the second end surface 12 are symmetrically arranged about the center line of the body 10, the position of the connector 20 can still be ensured not to be changed, and the universality of the circuit board can be ensured. Specifically, the two connectors 20 close to the first end face 11 and the second end face 12 are symmetrically disposed about the center line in the width direction of the body 10. Alternatively, which connector 20 is specifically used to achieve the connection with the BMS battery management module may be determined by the BMS battery management module mounting position, for example, the BMS battery management module is disposed at a side of the battery case 50 near the first end surface 11, at which time the harness may be connected to the connector 20 near the first end surface 11, or the BMS battery management module is disposed at a side of the battery case 50 near the second end surface 12, at which time the harness may be connected to the connector 20 near the second end surface 12.

In one embodiment, as shown in fig. 4, the connecting portion 13 is disposed on the body 10, and the connecting portion 13 is disposed between the connector 20 and the first end surface 11, or the connecting portion 13 is disposed between the connector 20 and the second end surface 12, so that the body 10 can be connected to the battery device through the connecting portion 13, thereby facilitating the fixing of the circuit board, and the connecting portion 13 can be connected to the battery device because the connecting portion 13 is disposed at the end of the body 10 and forms a space with the connector 20.

In one embodiment, the number of the connecting portions 13 is multiple, the connecting portions 13 are disposed along the length direction of the body 10, and the two connecting portions 13 respectively close to the first end surface 11 and the second end surface 12 are symmetrically disposed about the center line of the body 10, so that in the installation and use process of the circuit board, even if the circuit board is installed by rotating 180 degrees, since the two connecting portions 13 close to the first end surface 11 and the second end surface 12 are symmetrically disposed about the center line of the body 10, the connecting portions 13 can still be connected, and the universality of the circuit board can be ensured. Specifically, the two connecting portions 13 near the first end face 11 and the second end face 12 are symmetrically disposed about the center line in the width direction of the body 10. Alternatively, the circuit board may be selectively fixed by two connection portions 13 near the first and second end faces 11 and 12.

The body 10 may be provided with a plurality of connection portions 13 at positions close to the first end surface 11, the plurality of connection portions 13 may be spaced apart along the width direction of the body 10, the body 10 may be provided with a plurality of connection portions 13 at positions close to the second end surface 12, and the plurality of connection portions 13 may be spaced apart along the width direction of the body 10. As shown in fig. 4, two connecting portions 13 may be disposed at a position of the body 10 close to the first end surface 11, and two connecting portions 13 may be disposed at a position of the body 10 close to the second end surface 12.

In one embodiment, the connecting portion 13 is a through hole through which a fastener can be inserted, so as to mount the circuit board and the battery device.

The circuit board may pass through the connecting portion 13 through the fastener and be directly connected to the battery case, or the circuit board may be provided with a fixing plate, that is, the fixing plate may be fixed to the body 10 through the fastener, and then the body 10 may be connected to the battery case through the fixing plate.

In some embodiments, the connecting portion 13 may also be a buckle, and the circuit board may be directly clamped to the battery box body through the buckle. Or, the connecting portion 13 may also be a positioning column, and the positioning column may be directly inserted into the battery box.

In one embodiment, the middle part of the body 10 is provided with an avoiding through hole 14 for avoiding the explosion-proof valve, so that after the circuit board is connected to the battery device, the avoiding through hole 14 and the explosion-proof valve of the battery are oppositely arranged, the circuit board is prevented from shielding the explosion-proof valve, and the explosion-proof valve can be exploded when the internal pressure of the battery reaches a certain height, thereby ensuring the safe use of the battery.

In one embodiment, an escape through hole 14 is provided between the connector 20 and the first end surface 11, and/or an escape through hole 14 is provided between the connector 20 and the second end surface 12, the escape through hole 14 is used for being arranged opposite to an explosion-proof valve of a battery, so that the battery is arranged below the connector 20 and the first end surface 11, and the battery is arranged below the connector 20 and the second end surface 12, and therefore the connector 20 is not too close to the first end surface 11 and the second end surface 12.

It should be noted that the circuit board may be installed inside the battery device, the battery device may have a plurality of batteries inside, the body 10 may have a plurality of avoiding through holes 14, and the plurality of avoiding through holes 14 may avoid the explosion-proof valve of the plurality of batteries.

In one embodiment, the circuit board further includes a buffer 30, and the buffer 30 is disposed on at least one side of the body 10, so that the body 10 can be protected by the buffer 30, and the circuit board is prevented from being damaged due to too large rigid contact with an external structure.

In one embodiment, the buffer member 30 may be a buffer foam, and the buffer foam may implement a buffer fixing function on the circuit board, so as to protect the circuit board. The buffer member 30 may be of a rubber structure or other structures having a buffering function, and is not limited herein.

In one embodiment, as shown in fig. 3, the buffer member 30 disposed on the side of the body 10 away from the connector 20 extends along the length direction of the body 10, that is, the side of the body 10 away from the connector 20 can be disposed toward the batteries, and the buffer member 30 extending along the length direction can be disposed to reliably contact the circuit board with each battery, thereby fixing the circuit board.

The body 10 can be provided with two buffering pieces 30 on the side away from the connector 20, the buffering pieces 30 are two buffering foams, and the two buffering foams are respectively arranged on two sides of the body 10 to avoid the avoiding through hole 14 in the middle of the body 10, as shown in fig. 3. The end faces of the two foam pieces may be substantially flush with the first end face 11 and the second end face 12.

In one embodiment, the number of the buffering members 30 disposed at the other side of the body 10 where the connector 20 is disposed is plural, and the plural buffering members 30 are disposed at intervals along the length direction of the body 10, so as to avoid the connector 20, the escape through hole 14, the connection portion 13, and the like, and protect the top of the circuit board from the overvoltage. The buffer member 30 disposed at the other side of the body 10 where the connector 20 is disposed may also be a buffer foam, as shown in fig. 1.

In one embodiment, the body 10 is a rigid circuit board, so as to ensure the structural strength of the battery panel, and the circuit board can be conveniently mounted inside the battery device, thereby realizing the rapid mounting and positioning of the circuit board. The circuit board may be a PCB board.

An embodiment of the utility model also provides a battery device, including foretell circuit board.

The utility model discloses a battery device's circuit board of embodiment includes body 10 and connector 20, connector 20 sets up on body 10, through making connector 20 and the equal interval setting of first terminal surface 11 and the second terminal surface 12 of body 10, thereby can make connector 20 be located body 10 length direction's middle part, avoid connector 20 to be located body 10 length direction's tip and influence the fixed of circuit board, and can provide the space for being connected of pencil and connector 20, and connector 20 is located body 10 length direction's middle part, also can avoid connector 20 and the inside high-pressure structure of battery device electromagnetic interference phenomenon to appear, with this safety in service performance who improves battery device.

In one embodiment, as shown in fig. 1, the battery device further includes a battery case 50 and a battery assembly 40, the battery assembly 40 is disposed in the battery case 50, and the body 10 is disposed above the battery assembly 40; wherein, the battery device further comprises a fixing plate 60, and the fixing plate 60 connects the battery case 50 and the connection part 13, thereby reliably fixing the circuit board on the battery case 50.

The fixing plate 60 may include three plate sections, one of which is connected to the connecting portion 13 of the body 10 by a fastener, another of which is connected to the battery case 50 by a fastener, and the third of which is connected to the other two of which, so that the body 10 and the battery case 50 are arranged up and down, as shown in fig. 1. The fixing plate 60 may be coupled to an end plate of the battery case 50 as shown in fig. 1. Alternatively, the fixing plate 60 may be attached to the top of the frame of the battery case 50, or the fixing plate 60 may be attached to the side of the frame of the battery case 50.

The battery assembly 40 may include a plurality of unit batteries connected in series or in parallel via a bus bar, and the circuit board may be provided with a nickel plate 70, and the nickel plate 70 may be connected to the unit batteries to obtain voltage information or temperature information. As shown in fig. 2, there may be a plurality of nickel sheets 70, a plurality of nickel sheets 70 may obtain voltage information of a plurality of unit batteries, and at least one nickel sheet 70 of the plurality of nickel sheets 70 may be provided with a temperature sensor, so as to obtain temperature information of the unit batteries.

A unit cell may include a cell and an electrolyte, and a minimum unit capable of performing an electrochemical reaction such as charge/discharge. The cell refers to a unit formed by winding or laminating a stack including a first electrode, a separator, and a second electrode. When the first electrode is a positive electrode, the second electrode is a negative electrode. Wherein the polarities of the first electrode and the second electrode can be interchanged.

The single battery is a laminated battery, which is convenient to pack and can be processed to obtain a battery with longer length. Specifically, electric core is lamination formula electric core, and electric core has first pole piece that stacks up each other, with first pole piece opposite electric property's second pole piece and the diaphragm of setting between first pole piece and second pole piece to make many to pile up and form lamination formula electric core to first pole piece and second pole piece.

Optionally, the single battery may be a winding battery, that is, a first pole piece, a second pole piece opposite to the first pole piece in electrical property, and a diaphragm piece disposed between the first pole piece and the second pole piece are wound to obtain a winding battery core.

It should be noted that the battery assembly may further include an end plate and a side plate, and the end plate and the side plate are used for fixing a plurality of single batteries, that is, the battery assembly forms a battery module.

A plurality of battery cells can form and set up in the battery box behind the battery module, and a plurality of battery cells can be fixed through end plate and curb plate. A plurality of battery cells can directly set up in the battery box, need not to pack a plurality of batteries promptly, at this moment, can get rid of end plate and curb plate.

It should be noted that, the individual cells of the battery assembly 40 may be connected in series or in parallel by the bus bar, and may be finally led out by the high voltage harness, so as to serve as the charging end and the discharging end of the battery device, and the high voltage harness is disposed near the first end surface 11 or the second end surface 12 of the circuit board, and since the connector 20 is disposed far from the first end surface 11 and the second end surface 12, the problem of electromagnetic interference may be reduced.

Other embodiments of the disclosure will be apparent to those skilled in the art from consideration of the specification and practice of the invention disclosed herein. This disclosure is intended to cover any variations, uses, or adaptations of the invention following, in general, the principles of the disclosure and including such departures from the present disclosure as come within known or customary practice in the art to which the disclosure pertains. It is intended that the specification and example embodiments be considered as exemplary only, with a true scope and spirit of the disclosure being indicated by the following claims.

It will be understood that the present disclosure is not limited to the precise arrangements described above and shown in the drawings and that various modifications and changes may be made without departing from the scope thereof. The scope of the disclosure is limited only by the appended claims.

Claims

1. A circuit board, comprising:

a body (10), the body (10) comprising first and second opposing end faces (11, 12), the first and second end faces (11, 12) being disposed along a length of the body (10);

connector (20), connector (20) set up in body (10), and follow in the length direction of body (10), first terminal surface (11) with connector (20) interval sets up, connector (20) with second terminal surface (12) interval sets up.

2. A circuit board according to claim 1, characterized in that the distance between the first end face (11) and the connector (20) is not less than 10mm, and the distance between the connector (20) and the second end face (12) is not less than 10mm.

3. The circuit board according to claim 1, wherein the connector (20) is plural, the plural connectors (20) are arranged along a length direction of the body (10), and two of the connectors (20) respectively adjacent to the first end face (11) and the second end face (12) are arranged symmetrically with respect to a center line of the body (10).

4. A circuit board according to claim 1, characterized in that the body (10) is provided with a connection portion (13), the connection portion (13) being located between the connector (20) and the first end face (11), or the connection portion (13) being located between the connector (20) and the second end face (12).

5. The circuit board according to claim 4, wherein the connecting portion (13) is a plurality of connecting portions, the plurality of connecting portions (13) are arranged along a length direction of the body (10), and two connecting portions (13) respectively adjacent to the first end surface (11) and the second end surface (12) are arranged symmetrically with respect to a center line of the body (10).

6. A circuit board according to claim 4, characterized in that the connection portion (13) is a through hole.

7. The circuit board according to claim 1, characterized in that the body (10) is provided at a middle portion thereof with an escape through hole (14) for escaping the explosion-proof valve.

8. A circuit board according to claim 7, characterized in that the relief via (14) is provided between the connector (20) and the first end face (11) and/or that the relief via (14) is provided between the connector (20) and the second end face (12).

9. The circuit board according to claim 1, characterized in that it further comprises a buffer (30), said buffer (30) being provided on at least one side of said body (10);

wherein, set up in body (10) deviates from connector (20) one side bolster (30) are followed the length direction of body (10) extends, set up in body (10) are provided with connector (20) opposite side bolster (30) are a plurality of, and a plurality of bolster (30) of saying follow the length direction interval of body (10) sets up.

10. A circuit board according to claim 1, characterized in that the body (10) is a rigid circuit board.

11. A battery device characterized by comprising the circuit board of any one of claims 1 to 10.

12. The battery device according to claim 11, further comprising a battery case (50) and a battery assembly (40), wherein the battery assembly (40) is disposed in the battery case (50), and the body (10) is disposed above the battery assembly (40);

the battery device further comprises a fixing plate (60), and the fixing plate (60) is connected with the battery box body (50) and the connecting part (13).