CN219740724U - Lithium battery protection board - Google Patents
Lithium battery protection board Download PDFInfo
- Publication number
- CN219740724U CN219740724U CN202321323530.0U CN202321323530U CN219740724U CN 219740724 U CN219740724 U CN 219740724U CN 202321323530 U CN202321323530 U CN 202321323530U CN 219740724 U CN219740724 U CN 219740724U
- Authority
- CN
- China
- Prior art keywords
- plate
- heat dissipation
- lithium battery
- circuit board
- battery protection
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 title claims abstract description 30
- 229910052744 lithium Inorganic materials 0.000 title claims abstract description 30
- 230000017525 heat dissipation Effects 0.000 claims abstract description 43
- 239000000758 substrate Substances 0.000 claims description 27
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 15
- 229910052782 aluminium Inorganic materials 0.000 claims description 15
- 238000004891 communication Methods 0.000 claims description 5
- 238000010438 heat treatment Methods 0.000 description 6
- 230000032683 aging Effects 0.000 description 2
- 238000002788 crimping Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000005855 radiation Effects 0.000 description 2
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 1
- 238000004026 adhesive bonding Methods 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 239000003990 capacitor Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000004519 grease Substances 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 229920001296 polysiloxane Polymers 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 239000000741 silica gel Substances 0.000 description 1
- 229910002027 silica gel Inorganic materials 0.000 description 1
- 238000005476 soldering Methods 0.000 description 1
- 238000009987 spinning Methods 0.000 description 1
Landscapes
- Battery Mounting, Suspending (AREA)
- Secondary Cells (AREA)
Abstract
The utility model discloses a lithium battery protection board, comprising: the circuit board comprises a base plate, and a wiring terminal and an electrical element which are arranged on the base plate; the lithium battery protection plate further includes: the first radiating plate is arranged on one side of the circuit board, which is arranged on one side of the electrical element and is positioned above the MOS device, a first avoidance groove is formed in the first radiating plate so as to avoid the wiring terminal, and an insulating pad is arranged between the first radiating plate and the MOS device; and the second radiating plate is arranged on one side, far away from the first radiating plate, of the circuit board, and the surface of the second radiating plate is connected with the circuit board in a bonding mode. According to the utility model, the heat dissipation plates are arranged on both sides of the circuit board, so that the heat dissipation area is increased, and the heat dissipation capacity of the protection plate is enhanced.
Description
Technical Field
The utility model belongs to the technical field of lithium batteries, and particularly relates to a lithium battery protection plate.
Background
The lithium battery protection board is used for protecting the charge and discharge of the series lithium battery pack, and detecting overvoltage, undervoltage, overcurrent, short circuit and overtemperature states of all single batteries in the battery pack, so as to protect and prolong the service life of the batteries; under-voltage protection makes each single battery avoid the damage of the battery caused by over-discharge when discharging, the control IC, MOS switch, resistance capacitance and other parts on the existing lithium battery protection board are integrally welded on the protection board, and then a layer of insulating paper is stuck on the surface of the protection board. The battery protection board of this structure dispels the heat inadequately, and the part is heated easily, and the circuit is ageing easily, influences battery life.
Disclosure of Invention
The utility model aims to overcome the defects and shortcomings of the background technology and provide the lithium battery protection plate with large heat dissipation area and strong heat dissipation capacity.
In order to achieve the above object, the present utility model provides a lithium battery protection plate comprising: the circuit board comprises a base plate, and a wiring terminal and an electrical element which are arranged on the base plate; the lithium battery protection plate further includes: the first radiating plate is arranged on one side of the circuit board, which is arranged on one side of the electrical element and is positioned above the MOS device, a first avoidance groove is formed in the first radiating plate so as to avoid the wiring terminal, and an insulating pad is arranged between the first radiating plate and the MOS device; the second radiating plate is arranged on one side, far away from the first radiating plate, of the circuit board, the surface of the second radiating plate is connected with the circuit board in a bonding mode, and the first radiating plate, the second radiating plate and the circuit board are connected in a detachable connection mode; wherein, a notch is arranged at the position of the second heat dissipation plate corresponding to the wiring terminal. The two sides of the circuit board are provided with the radiating plates, so that the radiating area is increased, and the radiating capacity of the protecting plate is enhanced.
Further, through holes are formed in the positions, corresponding to the first radiating plate and the substrate, of the first radiating plate, threaded holes are formed in the positions, corresponding to the through holes, of the second radiating plate, and the first radiating plate and the second radiating plate are connected through fastening screws installed in the through holes and the threaded holes. Realize dismantling the connection through fastening screw, when convenient to detach and assembly, also the overhaul circuit board of being convenient for.
Further, an aluminum plate is arranged between the first heat dissipation plate and the second heat dissipation plate. Because the heat conductivity coefficient and the heat convection coefficient of aluminum are relatively high, the heat dissipation capacity of the aluminum plate can be ensured by adopting the aluminum plate.
Further, a radiator is arranged on one side of the second radiating plate far away from the circuit board. The heat radiator is arranged to further enhance the heat radiation capability of the lithium battery protection board.
Further, the connecting terminal is arranged at the edge of the substrate, and a mounting hole is formed in the substrate below the connecting terminal. The OT terminal of crimping electric wire is convenient for install through setting up the mounting hole, improves the convenience of assembly.
Further, a second avoidance groove is formed in the first heat dissipation plate, and a communication connector is arranged on a substrate corresponding to the second avoidance groove. The battery data transmission device is provided with a communication interface, so that battery data can be conveniently transmitted.
Further, the substrate is made of aluminum materials. The aluminum substrate is adopted to conduct heat quickly, so that heat of an electrical element on the substrate can be transferred to the substrate, and the heat dissipation capacity of the lithium battery protection plate is improved by transferring the heat to the second heat dissipation plate through the substrate.
Compared with the prior art, the utility model has the following technical effects:
the lithium battery has reasonable and compact overall structural design, and the radiating plates are arranged on both sides of the circuit, so that the radiating area is increased, the radiating capacity is improved, the temperature rise of the lithium battery is low during working, the aging speed of the circuit is slowed down, and the service life of the battery is prolonged;
drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate preferred embodiments of the utility model and together with the description, serve to explain the principles of the utility model. In the figure:
fig. 1 is a schematic structural view of a lithium battery protection plate according to the present utility model;
fig. 2 is a schematic view of an exploded structure of the lithium battery protection plate of the present utility model.
Reference numerals in the drawings: 1. the circuit board, 101, the base plate, 102, binding post, 2, first heating panel, 3, second heating panel, 4, MOS device, 5, first groove, 6, through-hole, 7, screw hole, 8, mounting hole, 9, second dodge the groove, 10, spacing logical cover, 11, breach are dodged to the first.
Detailed Description
Embodiments of the utility model are described in detail below with reference to the attached drawings, but the utility model can be implemented in a number of different ways, which are defined and covered by the claims.
Examples: the lithium battery protection plate as shown in fig. 1 includes: the circuit board 1, set up first heating panel 2 and second heating panel 3 respectively in the both sides of circuit board 1, circuit board 1 includes base plate 101 and installs binding post 102 and electrical components on base plate 101, and binding post 102 divide into positive binding post and negative binding post to be connected with the positive and negative poles of battery, binding post 102 set up at the edge of base plate 101, and positive binding post and negative binding post divide into the both sides that are located base plate 101, so that the wiring. The electrical components are components required for forming a protection circuit, such as a control IC, a MOS device 4, a resistor capacitor, etc., soldered on the substrate 101, and the protection circuit is an existing circuit, specifically referred to as a BMS battery management system.
In this embodiment, the first heat dissipation plate 2 is disposed on one side of the circuit board 1 and is mounted on one side of the electrical component and located above the MOS device, and the first heat dissipation plate 2 is provided with a first avoidance groove 5 to avoid the connection terminal 102, and an insulating pad is disposed between the first heat dissipation plate and the MOS device 4, where the insulating pad is a heat-conducting silica gel insulating sheet or a heat-conducting silicone grease. The insulating pad is arranged, so that the step of gluing or pasting insulating paper on the circuit board is omitted, the battery assembly process is simplified, the battery assembly efficiency is improved, and the production cost is reduced. The second heat dissipation plate of this embodiment is disposed on one side of the circuit board 1 away from the first heat dissipation plate 2, and the surface of the second heat dissipation plate 2 is attached to the circuit board 1, so as to ensure a heat dissipation effect. The first heat dissipation plate 2 and the second heat dissipation plate 3 are both aluminum plates. Because the heat conductivity coefficient and the heat convection coefficient of aluminum are relatively high, the heat dissipation capacity of the aluminum plate can be ensured by adopting the aluminum plate. The substrate 101 is made of an aluminum material, that is to say, the substrate is an aluminum-based PCB board, and the aluminum substrate is adopted to conduct heat quickly, so that heat of electric elements on the substrate 101 can be transferred to the substrate 101, and the heat dissipation capacity of the lithium battery protection board is improved by transferring the heat to the second heat dissipation board 3 through the substrate 101.
This in order to be convenient for dismouting and maintenance circuit board, first heating panel 2, second heating panel 3 and circuit board 1 are connected through detachable connected mode, specifically: referring to fig. 2, through holes 6 are formed in the positions corresponding to the first heat dissipation plate 2 and the substrate 101, the through holes 6 are light holes, threaded holes 7 are formed in the positions corresponding to the through holes 6 in the second heat dissipation plate 3, and the first heat dissipation plate 2 and the second heat dissipation plate 3 are connected through fastening screws 8 installed in the through holes 6 and the threaded holes 7. A limiting sleeve 10 coaxial with the through hole 6 formed in the first heat dissipation plate 2 is arranged on one side, facing the second heat dissipation plate 3, of the first heat dissipation plate 2, and the second heat dissipation plate 6 is prevented from crushing the MOS device 4 due to excessive spinning of the fastening screw 8 during assembly by arranging the limiting sleeve 10.
The second heat dissipation plate 4 is provided with a notch 11 corresponding to the connection terminal, and a pad (not shown in the figure) is disposed at the position of the substrate 101 corresponding to each connection terminal 102, so that the connection terminal 102 is fixed to the substrate 101 by soldering, and the notch 11 is provided to avoid the pad. In other embodiments not shown, a heat sink, which is a fin heat sink, may be disposed in the notch 11 and mounted on the substrate, because the connection terminal is prone to heat.
In a further embodiment, not shown, a heat sink is provided on the side of the second heat-dissipating plate remote from the circuit board. The heat radiator is arranged to further enhance the heat radiation capability of the lithium battery protection board.
The mounting hole 8 is formed in the substrate below the wiring terminal, and the connecting wire of the wiring terminal 102 and the battery pack is crimped to the wiring terminal 102 through the OT terminal, so that the mounting of the OT terminal of the crimping wire is facilitated through the mounting hole 8, and the convenience of assembly is improved.
In this embodiment, the second avoidance groove 9 is formed on the first heat dissipation plate, and a communication connector (not shown in the figure) is installed on the substrate 101 corresponding to the second avoidance groove 9, so that the communication connector is arranged, and the battery data can be conveniently transmitted, thereby ensuring the working reliability of the lithium battery protection plate of the present utility model.
The above description is only of the preferred embodiments of the present utility model and is not intended to limit the present utility model, but various modifications and variations can be made to the present utility model by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present utility model should be included in the protection scope of the present utility model.
Claims (7)
1. A lithium battery protection plate, comprising: the circuit board comprises a base plate, and a wiring terminal and an electrical element which are arranged on the base plate; the lithium battery protection board is characterized by further comprising:
the first radiating plate is arranged on one side of the circuit board, which is arranged on one side of the electrical element and is positioned above the MOS device, a first avoidance groove is formed in the first radiating plate so as to avoid the wiring terminal, and an insulating pad is arranged between the first radiating plate and the MOS device; and
the second radiating plate is arranged on one side, far away from the first radiating plate, of the circuit board, the surface of the second radiating plate is connected with the circuit board in a bonding mode, and the first radiating plate, the second radiating plate and the circuit board are connected in a detachable connection mode;
wherein, a notch is arranged at the position of the second heat dissipation plate corresponding to the wiring terminal.
2. The lithium battery protection plate according to claim 1, wherein through holes are formed in the positions corresponding to the first heat dissipation plate and the substrate, threaded holes are formed in the positions corresponding to the through holes in the second heat dissipation plate, and the first heat dissipation plate and the second heat dissipation plate are connected through fastening screws installed in the through holes and the threaded holes.
3. The lithium battery protection plate according to claim 1, wherein the first heat dissipation plate and the second heat dissipation plate are both aluminum plates.
4. The lithium battery protection plate according to claim 2, wherein a radiator is provided on a side of the second heat dissipation plate away from the circuit board.
5. The lithium battery protection plate according to claim 1, wherein the connection terminal is provided at an edge of a substrate, and a mounting hole is provided on the substrate below the connection terminal.
6. The lithium battery protection plate according to claim 1, wherein a second avoidance groove is formed in the first heat dissipation plate, and a communication connector is mounted on a substrate corresponding to the second avoidance groove.
7. The lithium battery protection plate according to claim 1 or 6, wherein the substrate is an aluminum plate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321323530.0U CN219740724U (en) | 2023-05-29 | 2023-05-29 | Lithium battery protection board |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321323530.0U CN219740724U (en) | 2023-05-29 | 2023-05-29 | Lithium battery protection board |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219740724U true CN219740724U (en) | 2023-09-22 |
Family
ID=88053998
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321323530.0U Active CN219740724U (en) | 2023-05-29 | 2023-05-29 | Lithium battery protection board |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219740724U (en) |
-
2023
- 2023-05-29 CN CN202321323530.0U patent/CN219740724U/en active Active
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| GR01 | Patent grant | ||
| GR01 | Patent grant |