Battery low-temperature charging and heating device

Abstract

The utility model discloses a battery low-temperature charging and heating device, which relates to the technical field of battery charging and comprises a bin body with a battery bin and a charging bin, and opposite baffles are respectively arranged between the battery bin and the charging bin and between the charging bin and the bin body; a plurality of heat dissipation holes are distributed in the first baffle plate, the battery compartment wall and the charging compartment wall which are close to the first baffle plate, the second baffle plate, the compartment body wall and the charging compartment wall which are close to the second baffle plate; when the battery is charged at low temperature, the driving module drives the two baffles to move, so that the heat dissipation holes of the first baffle coincide with the heat dissipation holes in the bin wall of the battery bin and the bin wall of the charging bin which are close to each other, and the heat dissipation holes of the second baffle coincide with the heat dissipation holes in the bin wall of the charging bin. And the heat dissipation holes of the second baffle plate are respectively staggered with the heat dissipation holes in the cabin wall of the cabin body and the cabin wall of the charging cabin which are close to each other, so that the charging cabin transfers heat to the battery cabin. The device heats the battery by collecting heat emitted during charging of the charger, and the low-temperature charging efficiency of the battery is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of battery charging, in particular to a battery low-temperature charging heating device. Background Art

[0002] At low temperatures, the negative electrode of a lead-acid battery will be passivated, and the discharge product, lead sulfate, will form a polycrystalline layer on the surface of the negative electrode, causing the electrode surface and the sulfuric acid solution to be separated. When charging, sulfuric acid must pass through the polycrystalline layer with very low conductivity to reach it. Two-wheeled vehicle lithium batteries have no self-heating function, and lithium deposition will occur when charging at low temperatures, causing permanent damage to the battery and reducing the safety of lithium-ion batteries. In addition, in low temperature environments, the charging efficiency is low, and the battery may not be fully charged.

[0003] In view of the above problems, it is necessary to design a heating device to prevent the battery from being charged in a low temperature environment. Utility Model Content

[0004] In view of the above problems and technical requirements, the inventors have proposed a battery low-temperature charging heating device, which can reduce the safety risks of low-temperature charging of the battery.

[0005] The technical solution of the utility model is as follows:

[0006] A battery low-temperature charging and heating device comprises a chamber body with two independent chambers, one chamber is used to place a battery as a battery chamber, and the other chamber is used to place a charger as a charging chamber; opposite baffles are respectively arranged between the battery chamber and the charging chamber, and between the charging chamber and the chamber body; a first baffle and a chamber wall of the battery chamber and a chamber wall of the charging chamber close to the first baffle, and a second baffle and a chamber wall of the chamber body and a chamber wall of the charging chamber close to the second baffle are provided with a plurality of heat dissipation holes;

[0007] It also includes a driving module arranged in the charging bin, and the driving module is used to drive the two baffles to move when the battery is charged at low temperature, so that the heat dissipation holes of the first baffle coincide with the heat dissipation holes on the adjacent battery bin wall and the charging bin wall, and the heat dissipation holes of the second baffle are respectively misaligned with the heat dissipation holes on the adjacent bin wall and the charging bin wall, so as to realize heat transfer from the charging bin to the battery bin.

[0008] Its further technical solution is that the driving module includes at least one group of a first driving mechanism and a second driving mechanism, the first driving mechanism is arranged on the inner side of the charging bin wall close to the first baffle, and is used to drive the first baffle to move, and the second driving mechanism is arranged on the inner side of the charging bin wall close to the second baffle, and is used to drive the second baffle to move.

[0009] Its further technical solution is that the first driving mechanism and the second driving mechanism both include a servo, a telescopic rod and a block, one end of the telescopic rod is connected to the servo, and the other end is connected to the block, the servo is fixed on the inner side of the corresponding charging bin wall, and fixed grooves are opened in the vertical direction on both side walls of the charging bin with heat dissipation holes, the block passes through the fixed groove and is connected to the corresponding baffle, and when the servo controls the movement of the telescopic rod, it drives the block to move up and down along the fixed groove, thereby driving the corresponding baffle to move to the corresponding position.

[0010] Its further technical solution is that when the battery is charging normally, the heat dissipation holes of the first baffle are offset with the heat dissipation holes on the adjacent battery compartment wall and charging compartment wall, and the heat dissipation holes of the second baffle are overlapped with the heat dissipation holes on the adjacent compartment wall and charging compartment wall, so as to realize heat transfer from the charging compartment to the outside of the compartment body.

[0011] A further technical solution is that a plurality of heat dissipation holes are distributed on the corresponding warehouse walls and baffles in a rectangular array arrangement.

[0012] A further technical solution is that interlayers are provided between the battery compartment and the charging compartment, and between the charging compartment and the compartment body, the two interlayers are arranged opposite to each other, and the first baffle and the second baffle are respectively placed in the corresponding interlayers.

[0013] A further technical solution is that it also includes a fan arranged in the charging compartment, and the fan is used to accelerate heat transfer.

[0014] A further technical solution is that the control unit of the device is only connected to the battery for communication.

[0015] A further technical solution is that the first baffle with heat dissipation holes, the second baffle and the two side walls of the charging compartment are all made of heat-insulating materials.

[0016] A further technical solution is that the device's compartment is assembled on the electric vehicle body around the location of the electric vehicle battery, and wiring holes are reserved on the compartment wall; or when the electric vehicle battery is a detachable lithium battery, the device and the electric vehicle body are independent of each other.

[0017] The beneficial technical effects of the utility model are:

[0018] When the battery is charged at low temperature, the device proposed in the present application uses a driving module to drive the two baffles to move respectively, so that the holes of the three groups of heat dissipation holes close to the battery compartment side overlap, that is, the heat dissipation channel on the battery compartment side is in an open state, and the holes of the three groups of heat dissipation holes away from the battery compartment side are misaligned, that is, the heat dissipation channel on the charging compartment side is in a closed state. The heat generated by the on-board charger during charging is collected to heat the battery, which not only improves the low-temperature charging efficiency of the battery, but also reduces the impact of low-temperature charging on the battery life. The device has a low manufacturing cost, occupies little vehicle body space when assembled in the vehicle body, and has no other foreseeable risks. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a structural schematic diagram of the battery low-temperature charging and heating device provided in this application.

[0020] Figure 2 It is a top view of the battery low-temperature charging and heating device provided in this application.

[0021] Figure 3 It is a schematic diagram of the installation of the driving mechanism provided in this application.

[0022] Figure 4 It is a schematic diagram of the electrical connection relationship among the charger, battery and heating device provided in this application.

[0023] Figure 5 This is the steering gear drive circuit provided by this application.

[0024] Figure 6 This is a schematic diagram of the heat dissipation hole misalignment provided in this application.

[0025] Figure 7 It is a schematic diagram of the overlap of heat dissipation holes provided in this application. DETAILED DESCRIPTION

[0026] The specific implementation of the utility model is further described below in conjunction with the accompanying drawings.

[0027] Combination Figure 1 , Figure 2 As shown, the present application provides a battery low-temperature charging and heating device, including a compartment body 1 with two independent compartments and a driving module, one compartment is used to place batteries as a battery compartment 2, and the other compartment is used to place chargers as a charging compartment 3. An interlayer 4 is provided between the battery compartment 2 and the charging compartment 3, and between the charging compartment 3 and the compartment body 1. The two interlayers 4 are arranged opposite to each other and a first baffle 51 and a second baffle 52 are provided in the interlayers, respectively. A plurality of heat dissipation holes 6 are distributed on the first baffle 51 and the battery compartment wall and the charging compartment wall close to the first baffle 51, and on the second baffle 52 and the compartment body wall and the charging compartment wall close to the second baffle 52. The three groups of heat dissipation holes close to the battery compartment side form a heat dissipation channel, and the three groups of heat dissipation holes away from the battery compartment side form another heat dissipation channel.

[0028] The driving module is arranged inside the charging compartment 3, and is used to drive the first baffle 51 and the second baffle 52 to move respectively when the battery is charged at low temperature. The driving module includes at least one set of first driving mechanism 71 and second driving mechanism 72. The first driving mechanism 71 is arranged on the inner side of the charging compartment wall close to the first baffle 51, and is used to drive the first baffle 51 to move. The second driving mechanism 72 is arranged on the inner side of the charging compartment wall close to the second baffle 52, and is used to drive the second baffle 52 to move. In this embodiment, two sets of first driving mechanism 71 and second driving mechanism 72 are provided. The two first driving mechanisms 71 are symmetrically distributed at both ends of the same charging compartment wall, and do not interfere with the heat dissipation holes 6. Similarly, the two second driving mechanisms 72 are symmetrically distributed at both ends of the charging compartment wall on the opposite side, and do not interfere with the heat dissipation holes 6.

[0029] Optionally, the warehouse body wall, the charging warehouse wall and the battery warehouse wall have the same height, and the areas of the first baffle 51 and the second baffle 52 are smaller than the areas of each warehouse wall, which is convenient for the movement of the baffle, and the distance between the baffle and the adjacent warehouse wall is 0.5 to 1 mm; the first baffle 51 and the second baffle 52 with heat dissipation holes 6 and the warehouse walls on both sides of the charging warehouse 3 are all made of heat-insulating materials.

[0030] Combination Figure 1 , Figure 3 , Figure 6 As shown, the first driving mechanism 71 and the second driving mechanism 72 both include a servo 701, a telescopic rod 702 and a stopper 703. One end of the telescopic rod 702 is connected to the servo 701, and the other end is connected to the stopper 703. The servo 701 is fixed on the inner side of the corresponding charging bin wall. Fixed grooves 8 are provided on the bin walls on both sides of the charging bin with heat dissipation holes 6 in the vertical direction. The stopper 703 passes through the fixed grooves 8 and is connected to the corresponding baffle. When the servo 701 controls the movement of the telescopic rod 702, the stopper 703 is driven to move up and down along the fixed grooves 8, thereby driving the corresponding baffle to move to the corresponding position, which allows the two heat dissipation channels to switch freely between the open and closed states.

[0031] When charging the electric two-wheeled vehicle, the electrical connection relationship between the on-board charger, the battery and the heating device of the present application is as follows: Figure 4 As shown, the on-board charger is separately connected to the battery, and the battery is separately connected to the control unit of the device, wherein the control unit includes a single-chip microcomputer and a communication unit, a motor control unit and a power supply unit connected thereto, and the communication unit is connected to the battery BMS. The single-chip microcomputer is based on the existing temperature comparison logic. When the battery temperature collected by the BMS is lower than or higher than the set threshold, the motor control unit outputs square waves with different duty cycles to control the rotation angle of the servo, that is, to control the length of the telescopic rod. The circuit diagram of the square wave signal driving the servo is shown in the figure below. Figure 5As shown. The power supply unit takes power from the battery or external power supply to the single-chip microcomputer and the four servos. It should be noted that the communication unit, motor control unit and power supply unit provided in this embodiment are all implemented using the existing circuit structure, and the control logic used by the single-chip microcomputer is also implemented based on the existing logic.

[0032] When the battery is charged normally (at room temperature), the heat dissipation holes of the first baffle are offset from the heat dissipation holes on the battery compartment wall and the charging compartment wall respectively by default, such as Figure 6 As shown, when the battery compartment is completely staggered, the heat dissipation channel on the battery compartment side is in a closed state; at the same time, the heat dissipation holes of the second baffle overlap with the heat dissipation holes on the adjacent compartment wall and the charging compartment wall, as shown in FIG. Figure 7 As shown, the heat dissipation channel on the charging compartment side is in an open state. At this time, the heat generated by the charger during charging is transferred from the charging compartment to the outside of the compartment by the operation of the fan inside the charger. When the battery is charged at a low temperature, the first baffle is used to move its heat dissipation holes to coincide with the heat dissipation holes on the battery compartment wall and the charging compartment wall. The heat dissipation channel on the battery compartment side is in an open state. At the same time, the second baffle is moved to misalign its heat dissipation holes with the heat dissipation holes on the compartment wall and the charging compartment wall. When they are completely misaligned, the heat dissipation channel on the charging compartment side is in a closed state. At this time, the heat generated by the charger during charging is transferred from the charging compartment to the battery compartment by the operation of the fan inside the charger. The battery is heated by increasing the ambient temperature in the battery compartment.

[0033] Optional, combined Figure 6 , Figure 7 As shown, the multiple heat dissipation holes 6 provided in this embodiment are distributed on the corresponding warehouse walls and baffles in a rectangular array arrangement. The spacing between the rows and columns of the array is set according to actual needs, and this application does not impose any restrictions on this.

[0034] Optionally, the device also includes a fan (not shown in the figure) arranged in the charging compartment. The fan cooperates with the internal fan of the charger to accelerate the transfer of heat, so that the battery compartment heats up quickly, or the heat in the charging compartment quickly diffuses outward.

[0035] This device is suitable for low-temperature heating of different types of batteries, that is, the body of the device can be assembled on the electric vehicle body around the location of the electric vehicle battery (such as lead-acid battery, lithium battery, etc.), and the wall of the body is reserved with wiring holes. The device occupies less space on the vehicle body and will not affect the normal use of the battery. Or when the electric vehicle battery is a detachable lithium battery, the device and the electric vehicle body can be independent of each other, and this application does not limit the specific application scenario of the device.

[0036] The above is only the preferred embodiment of the present application, and the present invention is not limited to the above embodiments. It is understood that other improvements and changes directly derived or associated by those skilled in the art without departing from the spirit and concept of the present invention should be considered to be included in the protection scope of the present invention.

Claims

1. A battery low temperature charging heating device, characterized in that: The invention comprises a warehouse body having two independent compartments, one compartment is used to place batteries as a battery compartment, and the other compartment is used to place chargers as a charging compartment; opposite baffles are respectively arranged between the battery compartment and the charging compartment, and between the charging compartment and the warehouse body; a first baffle and a battery compartment wall and a charging compartment wall close to the first baffle, and a second baffle and a warehouse body wall and a charging compartment wall close to the second baffle are provided with a plurality of heat dissipation holes; It also includes a driving module arranged in the charging bin, which is used to drive the two baffles to move when the battery is charged at low temperature, so that the heat dissipation holes of the first baffle coincide with the heat dissipation holes on the adjacent battery bin wall and the charging bin wall, and the heat dissipation holes of the second baffle are respectively misaligned with the heat dissipation holes on the adjacent bin wall and the charging bin wall, so as to realize heat transfer from the charging bin to the battery bin.

2. The battery low temperature charging heating device according to claim 1, characterized in that: The driving module includes at least one set of a first driving mechanism and a second driving mechanism. The first driving mechanism is arranged on the inner side of the charging compartment wall close to the first baffle, and is used to drive the first baffle to move. The second driving mechanism is arranged on the inner side of the charging compartment wall close to the second baffle, and is used to drive the second baffle to move.

3. The battery low temperature charging heating device according to claim 2, characterized in that: The first driving mechanism and the second driving mechanism both include a servo, a telescopic rod and a block, one end of the telescopic rod is connected to the servo, and the other end is connected to the block, the servo is fixed to the inner side of the corresponding charging bin wall, and fixed grooves are provided on the two side walls of the charging bin with the heat dissipation holes in the vertical direction, the block passes through the fixed groove and is connected to the corresponding baffle, and when the servo controls the movement of the telescopic rod, it drives the block to move up and down along the fixed groove, thereby driving the corresponding baffle to move to the corresponding position.

4. The battery low temperature charging heating device according to claim 1, characterized in that: When the battery is charging normally, the heat dissipation holes of the first baffle are offset from the heat dissipation holes on the adjacent battery compartment wall and charging compartment wall, and the heat dissipation holes of the second baffle are overlapped with the heat dissipation holes on the adjacent compartment wall and charging compartment wall, so as to transfer heat from the charging compartment to the outside of the compartment.

5. The battery low temperature charging heating device according to claim 1, characterized in that: A plurality of heat dissipation holes are distributed on the corresponding warehouse walls and baffles in a rectangular array arrangement.

6. The battery low temperature charging heating device according to claim 1, characterized in that: An interlayer is provided between the battery compartment and the charging compartment, and between the charging compartment and the compartment body. The two interlayers are arranged opposite to each other, and the first baffle plate and the second baffle plate are respectively placed in the corresponding interlayers.

7. The battery low temperature charging heating device according to claim 1, characterized in that: It also includes a fan arranged in the charging compartment, and the fan is used to accelerate heat transfer.

8. The battery low temperature charging heating device according to claim 1, characterized in that: The control unit of the device is in communication connection with the battery only.

9. The battery low temperature charging heating device according to claim 1, characterized in that: The first baffle plate with the heat dissipation holes, the second baffle plate and the two side walls of the charging bin are all made of heat-insulating materials.

10. The battery low temperature charging heating device according to any one of claims 1 to 9, characterized in that: The chamber of the device is assembled on the electric vehicle body around the location of the electric vehicle battery, and wiring holes are reserved on the chamber wall; or when the electric vehicle battery is a detachable lithium battery, the device and the electric vehicle body are independent of each other.

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