WO2021017099A1

WO2021017099A1 - Positioning protection circuit device for lithium ion battery

Info

Publication number: WO2021017099A1
Application number: PCT/CN2019/104564
Authority: WO
Inventors: 冯梓洋; 曾伍军; 付佳彬; 罗明祥
Original assignee: 深圳市明唐通信有限公司
Priority date: 2019-08-01
Filing date: 2019-09-05
Publication date: 2021-02-04
Also published as: CN210120208U

Abstract

A positioning protection circuit device for a lithium ion battery comprises a battery protection main board (11), a positioning plate (12) detachably provided on the battery protection main board, and a conductive connecting assembly (13) for electrically connecting the battery protection main board (11) to the positioning plate (12). The conductive connecting assembly (13) comprises at least one female header (131) provided on the battery protection main board (11), and at least one pin header (132) provided on the positioning plate (12); alternatively, the conductive connecting assembly (13) comprises at least one female header (131) provided on the positioning plate (12), and at least one pin header (132) provided on the battery protection main board (11). The at least one pin header (132) corresponds to the at least one female header (131), such that the positioning plate (12) and the battery protection main board (11) are electrically connected. The positioning protection circuit device for a lithium ion battery has low production costs, stable and reliable performance, and is easily assembled.

Description

Positioning protection circuit device for lithium ion battery

Technical field

The present invention relates to the technical field of lithium ion batteries, and more specifically, to a positioning protection circuit device for lithium ion batteries.

Background technique

At present, the positioning plate used for lithium-ion batteries is generally connected to the battery protection main board by an external method. The external method means that the positive and negative terminals of the lithium-ion battery are connected to the positioning plate to supply power to the positioning plate, thereby facilitating the The positioning board realizes the positioning function of the lithium ion battery. However, if you use this kind of plug-in connection, it is usually impossible to achieve deep connection, so it is impossible to know the working status of the battery protection motherboard, and it is impossible to count the number of cycles of use of the battery as a basis for after-sales problem maintenance of the battery. The remote control of the battery requires an additional relay, which increases the cost of the battery protection motherboard.

technical problem

Using this kind of plug-in connection, it is usually impossible to achieve in-depth connection, so it is impossible to know the working status of the battery protection motherboard, and it is impossible to count the number of cycles of battery use as the basis for maintenance of after-sales problems of the battery. The remote control of the battery requires an additional relay, which increases the cost of the battery protection motherboard.

Technical solutions

The technical problem to be solved by the present invention is to provide an improved positioning protection circuit device for lithium ion batteries.

The technical solution adopted by the present invention to solve its technical problems is: constructing a positioning protection circuit device for lithium-ion batteries, including a battery protection main board, a positioning board detachably arranged on the battery protection main board, and A conductive connection component for conductive connection between the battery protection main board and the positioning plate;

The conductive connection assembly includes at least one female header arranged on the battery protection main board and at least one header arranged on the positioning board; or, the conductive connection assembly includes at least one header arranged on the positioning board. At least one female header, and at least one header provided on the battery protection mainboard;

The at least one pin header is arranged corresponding to the at least one pin header to electrically connect the positioning plate and the battery protection main board.

Preferably, it further includes a first protective heat dissipation plate; the first protective heat dissipation plate is arranged on one side of the battery protection main board, and a gap is left between the battery protection main board and the battery protection main board;

The positioning plate is located between the protective heat dissipation plate and the battery protection main board.

Preferably, the first protective heat dissipation plate includes a plate body; the plate body includes a first straight portion, a second straight portion, and a bend connecting the first straight portion and the second straight portion unit;

The first straight portion is located above the positioning plate.

Preferably, the first protective heat dissipation plate further includes a plurality of positioning posts arranged on the plate body at intervals to be connected with the battery protection main board.

Preferably, it further includes a second protective heat dissipation plate arranged on the other side of the battery protection main board.

Preferably, several chips arranged side by side are provided on the battery protection motherboard;

The at least one busbar includes two busbars arranged at intervals; the plurality of chips are arranged between the two busbars;

The at least one pin header includes two pin headers arranged on the positioning plate at intervals and corresponding to the two header pins.

Preferably, it further includes a shielding cover; the shielding cover is arranged between the plurality of chips and the positioning plate.

Preferably, it further includes an insulating gasket arranged on the side of the battery protection main board opposite to the positioning plate.

Preferably, a plurality of MOS tubes arranged side by side are provided on the battery protection main board.

Preferably, the battery protection main board is provided with a flat cable connected with the lithium ion battery.

Beneficial effect

The positioning protection circuit device for lithium-ion batteries implementing the present invention has the following beneficial effects: the positioning protection circuit device for lithium-ion batteries provides at least one busbar on the battery protection main board, and at least At least one pin header corresponding to a female header, or by arranging at least one header on the positioning plate, and at least one header corresponding to the at least one header on the battery protection board, so that the battery protects the motherboard and the The positioning boards can be connected to each other by plugging the header and the female header to achieve a conductive connection, thereby achieving in-depth connection, so as to facilitate understanding of the working status of the battery protection motherboard and the number of cycles of use of the battery, and facilitate the realization of the battery Remote control and after-sales maintenance. The positioning protection circuit device for lithium ion batteries has the advantages of low production cost, convenient assembly, and stable and reliable performance.

Description of the drawings

The present invention will be further described below in conjunction with the accompanying drawings and embodiments. In the accompanying drawings:

1 is a schematic structural diagram of a first embodiment of a positioning protection circuit device for lithium-ion batteries according to the present invention;

FIG. 2 is an exploded schematic diagram of the structure of the positioning protection circuit device for lithium ion batteries shown in FIG. 1;

3 is a schematic diagram of the structure of the battery protection main board and the insulating gasket of the positioning protection circuit device for the lithium ion battery shown in FIG. 1;

4 is an exploded schematic diagram of a partial structure of the battery protection main board of the positioning protection circuit device for lithium ion batteries shown in FIG.

5 is a schematic diagram of the structure of the positioning plate of the positioning protection circuit device for lithium-ion batteries shown in FIG. 1;

6 is a schematic structural diagram of a second embodiment of a positioning protection circuit device for a lithium ion battery according to the present invention;

FIG. 7 is an exploded schematic diagram of the structure of the positioning protection circuit device for the lithium ion battery shown in FIG. 6.

The best mode of the invention

In order to have a clearer understanding of the technical features, objectives and effects of the present invention, the specific embodiments of the present invention will now be described in detail with reference to the accompanying drawings.

Figures 1 and 2 show a preferred embodiment of the positioning protection circuit device for lithium ion batteries of the present invention. The positioning protection circuit device for lithium-ion batteries can realize the deep connection between the battery protection main board 11 and the positioning board 12, so as to facilitate the understanding of the working status of the battery protection main board, the number of battery cycles, and the monitoring of battery voltage and real-time Monitor battery power SOC percentage, realize real-time monitoring of battery temperature, realize real-time monitoring of battery protection board temperature, realize remote control of charging and discharging switches by supporting platform and SMS commands, realize air upgrade, and support remote firmware upgrade. The positioning protection circuit device for lithium ion batteries has the advantages of low production cost, convenient assembly, and stable and reliable performance.

As shown in FIGS. 1 and 2, the positioning protection circuit device for lithium-ion batteries may include a battery protection main board 11, a positioning plate 12, a conductive connection assembly 13, a first protective heat dissipation plate 14, and an insulating gasket 15. The battery protection main board 11 can be used to protect lithium-ion batteries. It can work in cooperation with the positioning board 12. The positioning board 12 can be detachably arranged on the battery protection main board 11 through the conductive connection assembly 13, and is connected to the The battery protection main board 11 forms an integrated structure and can work simultaneously. If it is removed from the battery protection main board 11, the battery protection main board 11 stops working. The conductive connection assembly 13 can conductively connect the positioning plate 12 and the battery protection main board 11. The first protective heat dissipation plate 14 can be installed on one side of the battery protection main board 11, which can be used to protect the positioning plate and the battery protection main board 11 and facilitate the heat dissipation of the battery protection main board 11 and the first protection heat dissipation board 14. The insulating gasket 15 can be located on the other side of the battery protection main board 11, which can play an insulating role.

As shown in FIGS. 2 to 4, the battery protection motherboard 11 may include a motherboard body 111, a number of chips 112, a shielding cover 113, a number of MOS tubes 114, and a flat cable 115. The main board body 111 can be a PCB board, which can be used for mounting the chip 112, the MOS tube 114, the shielding cover 113, the flat cable 115, and other components. The plurality of chips 112 may be arranged side by side on the main board body 111 along the width direction of the main board body 111. In some embodiments, the plurality of chips 112 may be four chips. It is understandable that, in some other embodiments, the number of the chips 112 may not be limited to four, and it may be one or more. The shielding cover 113 can be arranged on the plurality of chips 112 along the width direction of the main board body 111 to isolate the chip 112 from the positioning plate 12 and shield the chip 112. The plurality of MOS transistors 114 may be arranged side by side on one side of the main board body 111 along the length direction of the main board body 111. In some embodiments, the plurality of MOS transistors 114 may also be arranged on two opposite sides of the main board body 111. The number of MOS transistors 114 may be one or more, which may be used for battery charging and discharging. The flat cable 115 can be located on the battery protection main board 11, on the side of the battery protection board 11 where the chip 112 is arranged, and at one end close to the chip 112, and can be used to connect to the lithium ion battery. The ion battery can be a single battery or a battery pack.

The main board body 111 can be a longitudinally long plate, and a slot 1111 can be provided on the main body 111 to facilitate the insertion and installation of the shielding cover 113. The card slot 1111 can be multiple, which can be distributed on both sides of the main board body 111. The main board body 111 can also be provided with a button hole 1112 to facilitate the snap-in of the shielding cover.

The shielding cover 113 may be a rectangular parallelepiped, and its two opposite sides in the width direction can be bent to form a rib 1131 to be inserted into the slot 111, and a buckle 1132 can also be provided on one long side of the buckle 1132. It can be buckled into the button hole 1112 so that the shielding cover 113 is fixed on the main body 111. Understandably, in some other embodiments, the shielding cover 113 may not be limited to a rectangular parallelepiped shape. In some embodiments, the material of the shielding cover 113 may be nickel silver, and it is understandable that in some other embodiments, it may not be limited to be made of nickel silver. The shielding cover 113 can be used to prevent the chip 112 from being interfered, so as to prevent the chip 112 from making a wrong judgment.

As shown in Figures 2 and 5, the positioning plate 12 can be located between the first protective heat dissipation plate 14 and the battery protection main board 11; plugged into the battery protection main board 11, the positioning plate 12 can include a positioning plate body 121, A functional module 122 arranged on the positioning board body 121; the functional module includes a positioning module and a communication module; the positioning board body 121 may be a PCB board, which can be used for installation of the positioning module. The positioning module can be connected to the battery protection main board 11, and the battery protection main board 11 supplies power to the positioning module, and the positioning module has a GPS function, which can facilitate the realization of lithium ion battery positioning. The positioning module may include a GPS positioning processing chip, and the GPS positioning processing chip may be connected to the battery protection main board 11 through the conductive connection component. The communication module has a GPRS function, which can be connected to a GPS positioning processing chip, and can be used for signal transmission between the GPS positioning processing chip and the battery protection motherboard 11.

Further, in some embodiments, the conductive connection assembly 13 may include two headers 131 and two headers 132. It is understandable that in some other embodiments, the number of headers 131 may be one or more. There may also be one or more pin headers 132. The pin header 132 and the female header 131 are arranged correspondingly. The two female headers 131 can be arranged on the battery protection main board 11 and they can be arranged at intervals. The plurality of chips 12 can be located between the two female headers 131. The two pin headers 132 can be located on the positioning plate 12, and they can be arranged at intervals. They are arranged corresponding to the two headers 131, so as to be inserted into the header 131 to protect the positioning plate 12 and the battery. The main board 11 is bridged so as to realize remote control of battery charging and discharging by controlling the IO port interruption, and to understand the usage information of the battery and the battery protection main board 11 in real time. By bridging the pin header 132 and the female header 131, the positioning module and the communication module on the positioning board 12 can be connected to the IO port of the battery protection main board 11. It is understandable that, in some other embodiments, the female header 131 can be provided on the positioning plate 12, and the header pin 132 can be provided on the battery protection main board 11, and it can be correspondingly provided to the positioning plate 12 It is electrically connected to the battery protection main board 11.

Specifically, in some embodiments, the GPS positioning processing chip outputs high-frequency or low-frequency signals and transmits them to the corresponding IO1 port and/or IO2 port of the battery protection motherboard 11 through the communication module, so as to control the battery protection motherboard 11. Charging on and off. Through the communication module for data transmission, the GPS positioning processing chip can be read through the existing temperature detection method, and output high frequency or low frequency through the communication module to the IO3 port of the battery protection motherboard 11 and increase the thermistor. The temperature of the battery or protection board. The processing chip on the battery protection motherboard 11 can output high-frequency or low-frequency signals through the IO4 port or the IO5 port, and transmit it through the communication module, so as to inform the GPS positioning processing chip of the battery protection motherboard 11 charging status or Discharge state. The processing chip on the battery protection motherboard 11 can output high-frequency or low-frequency signals through the IO6 port, and transmit it through the communication module, so as to inform the GPS positioning processing chip whether the temperature of the battery protection motherboard 11 is over-temperature. In some embodiments, the GPS positioning processing chip can read the battery by outputting the high frequency or low frequency to the IO port of the battery protection motherboard 11 through the existing voltage detection method and the method of adding the thermistor and through the communication module. Or the voltage of the protection board.

As shown in FIGS. 1 and 2, in some embodiments, the first protective heat dissipation plate 14 may be disposed on one side of the battery protection main board 11, and a space may be left between it and the battery protection main board 11. In order for the battery to protect the main board 11 and the positioning plate 12 to dissipate heat, it includes a plate body 141 and a number of positioning posts; the plate body 141 can be made of aluminum or aluminum alloy, which can cover the positioning plate 12 and The battery protection main board 11 may include a first straight portion 1411, a second straight portion 1412, and a bent portion 1413; the first straight portion 1411 may cover the positioning plate 12, and its height is higher than the The second straight portion 1412 is provided. The second straight portion 1412 can cover the MOS transistor 114. The bent portion 1413 can be used to connect the first straight portion 1411 and the second straight portion 1412. The positioning pillars 142 can be arranged on the board body 141 at intervals, which can be used to connect with the battery protection main board 11 to facilitate the positioning of the board body 141, and make the board body 141 and the battery protection main board 11 leave between There are intervals to facilitate heat dissipation.

The insulating gasket 15 can be a rubber gasket or a silicone gasket or a plastic gasket, which can be arranged on the side of the battery protection main board 11 opposite to the positioning plate 12; the insulation gasket 15 and the battery protection main board 11 The connection may be detachable. Specifically, the insulating gasket 15 and the battery protection main board 11 may be connected by setting screws.

6 and 7 show the second embodiment of the positioning protection circuit device for lithium-ion batteries according to the present invention. The difference from the first embodiment is that the insulating gasket 15 can be omitted. The positioning protection circuit device for lithium-ion batteries further includes a second protective heat dissipation plate 16; the second protective heat dissipation plate 16 can be arranged on the other side of the battery protection main board 11, and can be used to dissipate heat to the battery protection main board 11. The second protective heat dissipation plate 16 may include a plate body 161 and a number of positioning posts 162 arranged on the plate body 161; the shape and size of the plate body 161 are adapted to the shape and size of the battery protection main board 11. The positioning posts 162 are arranged on the board body 161 at intervals, and can be used to connect the battery protection main board 11 and leave a gap between the board body 161 and the battery protection main board 11 to facilitate heat dissipation.

It is understandable that the above examples only express the preferred embodiments of the present invention, and the descriptions are more specific and detailed, but they should not be construed as limiting the scope of the present invention; it should be pointed out that for those of ordinary skill in the art In other words, without departing from the concept of the present invention, the above technical features can be freely combined, and several modifications and improvements can be made. These all belong to the scope of protection of the present invention; therefore, everything that follows the scope of the claims of the present invention All equivalent changes and modifications shall fall within the scope of the claims of the present invention.

Claims

A positioning protection circuit device for lithium-ion batteries, characterized in that it comprises a battery protection main board (11), a positioning board (12) detachably arranged on the battery protection main board (11), and the battery A conductive connection component (13) that protects the main board (11) and the positioning board (12) for conductive connection;

The conductive connection assembly (13) includes at least one header (131) arranged on the battery protection main board (11), and at least one header (132) arranged on the positioning plate (12); or , The conductive connection assembly (13) includes at least one female header (131) arranged on the positioning plate (12), and at least one header (132) arranged on the battery protection main board (11);

The at least one pin header (132) is arranged corresponding to the at least one pin header (131), so as to electrically connect the positioning plate (12) and the battery protection main board (11).
The positioning protection circuit device for lithium-ion batteries according to claim 1, further comprising a first protective heat dissipation plate (14); the first protective heat dissipation plate (14) is arranged on the battery protection main board One side of (11), and there is a space between it and the battery protection main board (11);

The positioning plate (12) is located between the protective heat dissipation plate (14) and the battery protection main board (11).
The positioning protection circuit device for lithium-ion batteries according to claim 2, wherein the first protective heat dissipation plate (14) comprises a plate body (141); the plate body (141) comprises a first flat plate A straight portion (1411), a second straight portion (1412), a bent portion (1413) connecting the first straight portion (1411) and the second straight portion (1412);

The first straight portion (1411) is located above the positioning plate (12).
The positioning protection circuit device for lithium-ion batteries according to claim 3, characterized in that the first protective heat dissipation plate (14) further comprises an interval provided on the plate body (141) to be connected to the battery A number of positioning posts (142) connected to the main board (11) are protected.
The positioning protection circuit device for a lithium ion battery according to claim 2, further comprising a second protective heat dissipation plate (16) arranged on the other side of the battery protection main board (11).
The positioning protection circuit device for lithium-ion batteries according to claim 1, characterized in that a number of chips (112) arranged side by side are provided on the battery protection main board (11);

The at least one busbar (131) includes two busbars (131) arranged at intervals on the battery protection main board (11); the plurality of chips (112) are arranged between the two busbars (131) between;

The at least one pin header (132) includes two pin headers (132) arranged on the positioning plate (12) at intervals and corresponding to the two header pins (131).
The positioning protection circuit device for a lithium-ion battery according to claim 6, further comprising a shielding cover (113); the shielding cover (113) is arranged on the plurality of chips (112) and the positioning Between the plates (12).
The positioning protection circuit device for lithium-ion batteries according to claim 1, characterized in that it further comprises an insulating spacer (12) provided on the side of the battery protection main board (11) opposite to the positioning board (12). 15).
The positioning protection circuit device for lithium-ion batteries according to claim 1, characterized in that a plurality of MOS tubes (114) arranged side by side are provided on the battery protection main board (11).
The positioning protection circuit device for lithium-ion batteries according to claim 1, wherein the battery protection main board (11) is provided with a cable (115) connected to the lithium-ion battery.