CN220897077U - New energy automobile lithium cell BMS device - Google Patents

Abstract

The utility model discloses a new energy automobile lithium battery BMS device, which comprises a BMS protection plate, wherein a heat dissipation box is arranged below the BMS protection plate, two partition plates are fixedly connected to the inner wall of the heat dissipation box, two support plates are fixedly connected to the inner wall of the heat dissipation box, cooling fans are fixedly arranged on the upper surfaces of the two support plates, two groups of cooling holes are formed in the bottom surface of the BMS protection plate, a fixing plate is arranged in the heat dissipation box, the left side surface and the right side surface of the fixing plate are respectively and fixedly connected with one side surface, close to the two partition plates, of the fixing plate, a temperature sensor is fixedly arranged on the upper surface of the fixing plate, a heat dissipation guide plate is fixedly connected to the bottom surface of the BMS protection plate, the temperature sensor is positioned below the heat dissipation guide plate, and a microprocessor is fixedly arranged on the inner bottom wall of the heat dissipation box. This device improves BMS protection shield and BMS protection device's heat dispersion when the operation, will make BMS protection shield and BMS protection device to the better protection of lithium cell.

Description

New energy automobile lithium cell BMS device

Technical Field

The utility model relates to the field of lithium batteries, in particular to a new energy automobile lithium battery BMS device.

Background

The lithium battery is used as a power core of a new energy automobile, is a device for converting chemical energy into electric energy, belongs to a direct current power supply, and provides strong starting current for a starter when an engine is started; when the generator is overloaded, the generator can be assisted to supply power to the electric equipment; when the engine is at idle speed, power is supplied to the electric equipment; the storage battery is also a large-capacity capacitor, so that the electric appliance of the automobile can be protected; when the terminal voltage of the generator is higher than the electromotive force of the lead storage battery, a part of electric energy is converted into chemical energy to be stored for charging.

When the lithium battery of the new energy automobile operates, the BMS is required to be used for protection, the BMS is also called a lithium battery protection board, the battery is protected from being excessively over-charged, excessively over-charged and excessively over-current, and output short-circuit protection is further provided, but the current lithium battery BMS has poor heat dissipation performance when operating, is difficult to quickly cool when operating for a long time, and then influences the protection effect of the BMS on the lithium battery.

Disclosure of utility model

The utility model aims to provide a new energy automobile lithium battery BMS device which aims to solve the problems in the background technology.

In order to achieve the above purpose, the present utility model provides the following technical solutions:

The utility model provides a new energy automobile lithium battery BMS device, includes the BMS protection shield, the below of BMS protection shield is equipped with the heat dissipation case, the inner wall fixedly connected with of heat dissipation case two baffles, the inner wall fixedly connected with of heat dissipation case two the equal fixed mounting of upper surface of baffle has the cooling fan, two sets of cooling holes have been seted up to the bottom surface of BMS protection shield, the inside of heat dissipation case is equipped with the fixed plate, the left and right sides face of fixed plate is close to one side fixed connection each other with two baffles respectively, the last fixed surface of fixed plate installs temperature sensor, the bottom surface fixedly connected with heat dissipation baffle of BMS protection shield, temperature sensor is located the below of heat dissipation baffle, the interior bottom wall fixed mounting of heat dissipation case has microprocessor.

In a further embodiment, two groups of vent holes are formed in the outer surface of the heat dissipation box, dust filtering nets are fixedly connected to the inner walls of the two groups of vent holes, and heat dissipation through holes are formed in the back surface of the heat dissipation box.

In a further embodiment, the left and right sides of the heat dissipation box are fixedly connected with connecting seats, and the upper surfaces of the two connecting seats are provided with connecting grooves.

In a further embodiment, the bottom surface of the BMS protection plate is fixedly connected with two connection plates, and the bottom ends of the two connection plates are respectively extended to the inside of the two connection grooves.

In a further embodiment, the inner side walls of the two connecting grooves are provided with threaded holes, the inner walls of the two threaded holes are connected with locking screws in a threaded manner, and one ends of the two locking screws, which are close to each other, extend to the inner parts of the two connecting plates respectively.

In a further embodiment, a plurality of BMS protection devices are fixedly mounted on the upper surface of the BMS protection plate, and two groups of mounting holes are formed in the upper surface of the BMS protection plate.

Compared with the prior art, the utility model has the beneficial effects that:

This device can be to the heat conduction downwards of BMS protection shield through the heat dissipation baffle that is equipped with, simultaneously with fixed plate top temperature sensor's cooperation, can make temperature sensor detect the temperature of heat dissipation baffle bottom, and can utilize microprocessor analysis to handle, will start two cooling fan operations when the temperature numerical value is higher, reach the effect of blowing fast cooling to BMS protection device above the BMS protection shield, improve BMS protection shield and BMS protection device's heat dispersion when the operation, will make BMS protection shield and BMS protection device to the better protection of lithium cell.

Drawings

Fig. 1 is a schematic perspective view illustrating a front view of a lithium battery BMS device for a new energy vehicle.

Fig. 2 is a sectional view showing a front view of the lithium battery BMS device of the new energy vehicle.

Fig. 3 is a cross-sectional view of a top view of the lithium battery BMS device of the new energy automobile.

Fig. 4 is an enlarged schematic view of the structure of the new energy vehicle lithium battery BMS device at a in fig. 2.

In the figure: 1. BMS protection board; 2. a heat radiation box; 3. a partition plate; 4. a cooling fan; 5. a fixing plate; 6. a temperature sensor; 7. a microprocessor; 8. a support plate; 9. a heat dissipation through hole; 10. a cooling hole; 11. BMS protects the device; 12. a mounting hole; 13. a dust filtering net; 14. a vent hole; 15. a connecting seat; 16. a connecting groove; 17. a threaded hole; 18. a locking screw; 19. a connecting plate; 20. and a heat dissipation guide plate.

Detailed Description

In the description of the present utility model, it should be noted that, unless explicitly stated and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, directly connected, indirectly connected through an intermediate medium, or may be communication between two elements, and in the following, the technical solutions in the embodiments of the present utility model will be clearly and completely described with reference to the drawings in the embodiments of the present utility model, and it is apparent that the described embodiments are only some embodiments of the present utility model, not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

Referring to fig. 1-4, in the utility model, a new energy automobile lithium battery BMS device comprises a BMS protection board 1, a heat dissipation box 2 is arranged below the BMS protection board 1, two partition boards 3 are fixedly connected to the inner wall of the heat dissipation box 2, two support boards 8 are fixedly connected to the inner wall of the heat dissipation box 2, cooling fans 4 are fixedly installed on the upper surfaces of the two support boards 8, two groups of cooling holes 10 are formed in the bottom surface of the BMS protection board 1, a fixing board 5 is arranged in the heat dissipation box 2, the left side surface and the right side surface of the fixing board 5 are fixedly connected with one side surface, close to the two partition boards 3, of each other, a temperature sensor 6 is fixedly installed on the upper surface of the fixing board 5, a heat dissipation guide board 20 is fixedly connected to the bottom surface of the BMS protection board 1, the temperature sensor 6 is located below the heat dissipation guide board 20, and a microprocessor 7 is fixedly installed on the inner bottom wall of the heat dissipation box 2.

Two sets of ventilation holes 14 have been seted up to the surface of radiating bin 2, the equal fixedly connected with dust filter net 13 of inner wall of two sets of ventilation holes 14, radiating through-hole 9 has been seted up to the back of radiating bin 2, the equal fixedly connected with connecting seat 15 of the left and right sides face of radiating bin 2, spread groove 16 has all been seted up to the upper surface of two connecting seats 15, through the two sets of ventilation holes 14 that are equipped with, and with the cooperation of two sets of dust filter nets 13, guarantee the aeration cooling demand of radiating bin 2, will be to BMS protection shield 1 and BMS protection device 11 better cooling.

The bottom surface fixedly connected with two connecting plates 19 of BMS protection board 1, the bottom of two connecting plates 19 extends to the inside of two spread grooves 16 respectively, threaded hole 17 has all been seted up to the inside wall of two spread grooves 16, the equal threaded connection of inner wall of two threaded holes 17 has locking screw 18, the inside that two locking screw 18 are close to each other one end extends to two connecting plates 19 respectively, BMS protection board 1's upper surface fixed mounting has a plurality of BMS protection devices 11, BMS protection board 1's upper surface has seted up two sets of mounting holes 12, through connecting seat 15 and spread groove 16 that are equipped with, and with the cooperation of connecting plate 19 and locking screw 18, can make BMS protection board 1 and radiator box 2 between be connected, conveniently dismantle between the two simultaneously, improve the flexibility when maintaining the device.

The working principle of the utility model is as follows: firstly take BMS protection board 1 to make connecting plate 19 insert to the inside of spread groove 16, then rotate locking screw 18 again, and can make locking screw 18 rotate to the inside of connecting plate 19, will lock fixedly to connecting plate 19, can make BMS protection board 1 install in the top of radiator box 2 then, the installation of BMS protection board 1 is fixed to the reuse mounting hole 12, after BMS protection board 1 installs, utilize temperature sensor 6 can detect the temperature of radiator guide 20 bottom, and can carry microprocessor 7 to handle, when the temperature numerical value is higher, start two cooling fans 4 operation, can blow through the BMS protection device 11 of two sets of cooling holes 10 to BMS protection board 1 top, will accelerate the cooling rate of BMS protection device 11.

While the utility model has been described with reference to the preferred embodiments, it will be apparent to those skilled in the art that the utility model is not limited to the details of the exemplary embodiments and that the utility model may be embodied in other specific forms without departing from the spirit or essential characteristics thereof, as long as the scope of the utility model is defined by the claims and its spirit and scope. The present embodiments are, therefore, to be considered in all respects as illustrative and not restrictive, the scope of the utility model being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.

Furthermore, it should be understood that although the present disclosure describes embodiments, not every embodiment is provided with a separate embodiment, and that this description is provided for clarity only, and that the disclosure is not limited to the embodiments described in detail below, and that the embodiments described in the examples may be combined as appropriate to form other embodiments that will be apparent to those skilled in the art.

Claims (6)

1. A new energy automobile lithium cell BMS device, its characterized in that: including BMS protection shield (1), the below of BMS protection shield (1) is equipped with heat dissipation case (2), the inner wall fixedly connected with of heat dissipation case (2) two baffles (3), the inner wall fixedly connected with of heat dissipation case (2) two extension boards (8), two equal fixed mounting of upper surface of extension board (8) has cooling fan (4), two sets of cooling holes (10) have been seted up to the bottom surface of BMS protection shield (1), the inside of heat dissipation case (2) is equipped with fixed plate (5), the left and right sides face of fixed plate (5) respectively with a side fixed connection that two baffles (3) are close to each other, the last fixed surface of fixed plate (5) installs temperature sensor (6), the bottom surface fixedly connected with heat dissipation baffle (20) of BMS protection shield (1), temperature sensor (6) are located the below of heat dissipation baffle (20), the interior bottom wall fixed mounting of heat dissipation case (2) has microprocessor (7).

2. The new energy automobile lithium battery BMS device according to claim 1, wherein: two groups of vent holes (14) are formed in the outer surface of the heat dissipation box (2), dust filtering nets (13) are fixedly connected to the inner walls of the two groups of vent holes (14), and heat dissipation through holes (9) are formed in the back surface of the heat dissipation box (2).

3. The new energy automobile lithium battery BMS device according to claim 1, wherein: the radiating box is characterized in that connecting seats (15) are fixedly connected to the left side surface and the right side surface of the radiating box (2), and connecting grooves (16) are formed in the upper surfaces of the two connecting seats (15).

4. The new energy automobile lithium battery BMS device according to claim 3, wherein: the bottom surface fixedly connected with two connecting plates (19) of BMS protection shield (1), two the bottom of connecting plate (19) extends to the inside of two spread grooves (16) respectively.

5. The new energy automobile lithium battery BMS device according to claim 4, wherein: threaded holes (17) are formed in the inner side walls of the connecting grooves (16), locking screws (18) are connected to the inner walls of the threaded holes (17) in a threaded mode, and one ends, close to each other, of the locking screws (18) extend to the inner portions of the two connecting plates (19) respectively.

6. The new energy automobile lithium battery BMS device according to claim 1, wherein: the BMS protection board (1) is characterized in that a plurality of BMS protection devices (11) are fixedly arranged on the upper surface of the BMS protection board (1), and two groups of mounting holes (12) are formed in the upper surface of the BMS protection board (1).