Charging liquid cooling device and manufacturing method thereof

Abstract

The invention provides a charging liquid cooling device and a manufacturing method thereof. The battery charging and replacing liquid cooling device comprises a battery bin used for detachably containing a battery pack, and the top and the front portion of the battery bin are both open; the liquid cooling plate is arranged at the top of the battery compartment in a liftable manner; the lifting mechanism is used for driving the liquid cooling plate to lift; wherein a cooling liquid channel and a fire-fighting liquid channel which are separated from each other and are respectively communicated with the cooling liquid storage tank and the fire-fighting liquid storage tank through pipelines are formed in the liquid cooling plate, a plurality of spraying openings which are respectively communicated with the fire-fighting liquid channel are formed in the lower surface of the liquid cooling plate, and a charging opening is formed in the front part of the battery pack; a socket which is matched with the charging port and is connected with an external power supply through a charging power line is formed in the inner rear part of the battery bin, when the battery pack is placed in the battery bin, the charging port is in electric connection and communication connection with the socket, and the lifting mechanism drives the liquid cooling plate to descend, so that the liquid cooling plate is tightly attached to the upper surface of the battery pack.

Description

Technical Field

[0001] The present invention belongs to the technical field of battery charging safety, and in particular relates to a battery charging and swapping liquid cooling device and a manufacturing method thereof. Background Art

[0002] The popularity of electric bicycles and the introduction of the new standard "Electric Bicycle Safety Technical Specifications" 2023 have promoted the use of lithium batteries in electric bicycles. Limited by the current development status of lithium battery technology, the lithium battery packs currently used in electric bicycles still have risks such as thermal runaway, thermal expansion, and even explosion and fire. It has become a consensus among many parties that lithium batteries are strictly prohibited from entering buildings (charging), and the current centralized charging and swapping cabinets have not solved the safety issues of charging lithium battery packs. Therefore, how to cool and extinguish the charging battery pack and prevent thermal runaway and thermal expansion of the lithium battery pack has become a technical problem that needs to be solved urgently. Summary of the invention

[0003] The present invention is made to solve the above-mentioned technical problems, and its purpose is to provide a charging and swapping liquid cooling device and a manufacturing method thereof.

[0004] To achieve the above object, the present invention adopts the following technical solutions:

[0005] <Option 1>

[0006] The present invention provides a charging and swapping liquid cooling device, which has the following characteristics, including: a battery compartment, which is used to detachably hold a battery pack with a heat dissipation shell, and has openings at the top and front; a liquid cooling plate, which is arranged on the top of the battery compartment in a liftable manner; and a lifting mechanism, which is arranged on the battery compartment and connected to the liquid cooling plate, and is used to drive the liquid cooling plate to perform lifting and lowering actions relative to the battery compartment; wherein, the interior of the liquid cooling plate is formed with a cooling liquid channel and a fire-fighting liquid channel, which are separated from each other and respectively connected to a cooling liquid storage tank and a fire-fighting liquid storage tank through pipes, and the lower surface of the liquid cooling plate is provided with a plurality of spray ports respectively connected to the fire-fighting liquid channels, and the front of the battery pack is provided with a charging port, and the inner rear of the battery compartment is provided with a connector that matches the charging port and is connected to an external power source through a charging power line. When the battery pack is placed in the battery compartment, the charging port is electrically and communicatively connected to the connector, and the lifting mechanism drives the liquid cooling plate to descend, so that the liquid cooling plate is tightly attached to the upper surface of the battery pack.

[0007] The charging and swapping liquid cooling device provided by the present invention may also have the following features: the cooling liquid channel is located in the middle part of the liquid cooling plate, and the fire fighting liquid channel is located at the edges of the left and right sides and the front end of the liquid cooling plate.

[0008] The charging and swapping liquid cooling device provided by the present invention may also have the following features: wherein the rear end of the liquid cooling plate is provided with a coolant inlet and a coolant outlet respectively connected to the coolant channels, and a fire-fighting liquid inlet respectively connected to the fire-fighting liquid channels.

[0009] The charging and swapping liquid cooling device provided by the present invention may also have the following feature: a relay is installed in series on the charging power line.

[0010] The charging and swapping liquid cooling device provided by the present invention may also have the following feature: wherein the heat dissipation shell is made of a material with low density, high strength and thermal conductivity ≥ 2W / (m·K).

[0011] The charging and swapping liquid cooling device provided by the present invention may also have the following feature: the spray port at the edge of the liquid cooling plate has an inclination angle.

[0012] The charging and swapping liquid cooling device provided by the present invention may also have the following features: wherein the lifting mechanism includes four lifting push rods and four return springs which are arranged corresponding to each other, and every two lifting push rods and the corresponding two return springs are arranged on a side portion of the battery compartment. The lifting push rods are used to drive the liquid cooling plate to rise when the battery pack is not placed in the battery compartment, thereby putting the battery compartment in an unlocked state, and the return springs are used to pull the liquid cooling plate back and press it tightly against the upper surface of the battery pack when the battery pack is placed in the battery compartment and the lifting push rods unload the force, thereby putting the battery compartment in an interlocked state.

[0013] <Option 2>

[0014] The present invention also provides a method for manufacturing a charging and swapping liquid cooling device, which has the following characteristics and comprises the following steps:

[0015] Install a lifting mechanism on the battery compartment;

[0016] Install the liquid cooling plate on the lifting mechanism;

[0017] Use pipes to connect the coolant inlet and coolant outlet on the liquid cooling plate and the fire-fighting liquid inlet respectively;

[0018] Install the socket on the inner rear of the battery compartment;

[0019] A relay is installed in series on the charging power line connected to the socket, thereby completing the manufacture of the charging and swapping liquid cooling device.

[0020] Function and Effect of the Invention

[0021] According to the charging and swapping liquid cooling device involved in the present invention, since it has a liquid cooling plate and a lifting mechanism, the lifting mechanism can drive the liquid cooling plate to lift and lower relative to the battery compartment, and the lifting mechanism drives the liquid cooling plate to descend, so that the liquid cooling plate is tightly attached to the upper surface of the battery pack, and the interior of the liquid cooling plate is formed with a cooling liquid channel and a fire liquid channel that are separated from each other and connected to the cooling liquid storage tank and the fire liquid storage tank through pipes respectively. The lower surface of the liquid cooling plate is provided with a plurality of spray ports that are respectively connected to the fire liquid channels, so that in addition to heating or cooling the battery pack, the liquid cooling plate can also continuously extinguish the fire with water and cool it when thermal runaway occurs, which effectively solves the charging safety problem of the battery pack. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 is an exploded schematic diagram of a charging and swapping liquid cooling device in an embodiment of the present invention;

[0023] Figure 2 is a bottom view structural schematic diagram of a liquid cooling plate in an embodiment of the present invention;

[0024] Figure 3 In the embodiment of the present invention Figure 2 A cross-section along line AA; and

[0025] Figure 4 Schematic diagram of the structure of the lifting mechanism in the embodiment of the present invention. DETAILED DESCRIPTION

[0026] The concept, specific structure and technical effects of the present invention will be further described below in conjunction with the accompanying drawings to fully understand the purpose, characteristics and effects of the present invention.

[0027] <Example>

[0028] Figure 1 It is a schematic diagram of an exploded view of a charging and swapping liquid cooling device in an embodiment of the present invention.

[0029] like Figure 1 As shown, in this embodiment, the charging and swapping liquid cooling device 100 includes a battery compartment 10, a liquid cooling plate 20, a lifting mechanism 30 and a control unit (not shown in the figure).

[0030] like Figure 1 As shown, the battery compartment 10 is used to detachably contain the battery pack 200, and its top and front are both open structures. In this embodiment, the front of the battery pack 200 has a charging port (not shown in the figure); the shell of the battery pack 200 is a heat dissipation shell, which is made of a material with low density, high strength, and a thermal conductivity of ≥2W / (m·K), preferably a thermally conductive plastic, aluminum or aluminum alloy material.

[0031] The inner rear portion of the battery compartment 10 is provided with a socket 11 that matches the charging port of the battery pack 200. The socket 11 is connected to an external power source (not shown in the figure) through a charging power line (not shown in the figure). When the battery pack 200 is placed in the battery compartment 10, the charging port is electrically and communicatively connected to the socket 11. In this embodiment, a relay (not shown in the figure) is installed in series on the charging power line.

[0032] Figure 2 is a bottom view structural schematic diagram of a liquid cooling plate in an embodiment of the present invention; Figure 3 In the embodiment of the present invention Figure 2 Section view along line AA.

[0033] like Figures 1 to 3 As shown, the liquid cooling plate 20 is liftably arranged on the top of the battery compartment 10, and has a cooling liquid channel 21 and a fire-fighting liquid channel 22 formed therein, which are separated from each other and connected to the cooling liquid storage tank (not shown in the figure) and the fire-fighting liquid storage tank (not shown in the figure) through pipes, respectively.

[0034] The cooling liquid channel 21 is located in the middle of the liquid cooling plate 20 , and a cooling liquid inlet 211 and a cooling liquid outlet 212 communicating with the cooling liquid channel 21 are provided on the lower surface of the rear end portion thereof.

[0035] The fire-fighting liquid channel 22 is located at the edges of the left and right sides and the front end of the liquid cooling plate 20, and the lower surface of the rear end thereof is provided with a fire-fighting liquid inlet 221 respectively connected to the fire-fighting liquid channel 22; the lower surface of the liquid cooling plate 20 is provided with a plurality of spray ports 223 respectively connected to the fire-fighting liquid channel 22. In this embodiment, the spray ports 223 have an inclination angle.

[0036] Figure 4 Schematic diagram of the structure of the lifting mechanism in the embodiment of the present invention.

[0037] like Figure 1 and Figure 4 As shown, the lifting mechanism 30 is disposed on the battery compartment 10 and connected to the liquid cooling plate 20, and is used to drive the liquid cooling plate 20 to perform lifting and lowering actions relative to the battery compartment 10. The lifting mechanism 30 includes four lifting push rods 31 and four return springs 32, which are disposed correspondingly to each other, and two connecting cross bars 33.

[0038] Every two lifting push rods 31 , corresponding two return springs 32 and a connecting cross bar 33 are arranged on a side portion of the battery compartment 10 , and the liquid cooling plate 20 is fixedly arranged on the two connecting cross bars 33 .

[0039] The lifting push rod 31 is used to drive the liquid cooling plate 20 to rise when the battery pack 200 is not placed in the battery compartment 10, so that the battery compartment 10 is in an unlocked state.

[0040] The return spring 32 is used to pull the liquid cooling plate 20 back and press it against the upper surface of the battery pack 200 when the battery pack 200 is placed in the battery compartment 10 and the lifting push rod 31 releases force, thereby putting the battery compartment 10 in an interlocked state.

[0041] The control unit is respectively connected to the lifting push rod 31 and the relay on the charging power line through the communication line, so as to control these components to work; it is also used to monitor the temperature of the battery pack 200 in real time through the sensor (such as temperature sensor) installed in the battery compartment 10 or the battery pack 200, and when the temperature of the battery pack 200 exceeds the first predetermined threshold, start the coolant to heat or cool the battery pack 200; and when the temperature of the battery pack 200 exceeds the second predetermined threshold, disconnect the relay on the charging power line, start the fire fighting fluid, and perform water dousing to extinguish the fire and cool the battery pack 200.

[0042] In this embodiment, the present invention also provides a method for manufacturing the above-mentioned charging and swapping liquid cooling device 100. The manufacturing method comprises the following steps:

[0043] Step S1 , installing a lifting mechanism 30 on the battery compartment 10 .

[0044] Step S2 , installing the liquid cooling plate 20 on the lifting mechanism 30 .

[0045] Step S3, using pipes to connect the cooling liquid inlet 211 and the cooling liquid outlet 212 on the liquid cooling plate 20, and the fire-fighting liquid inlet 221.

[0046] Step S4 , installing the socket 11 at the inner rear portion of the battery compartment 10 .

[0047] Step S5, installing a relay in series on the charging power line connected to the socket 11, and thus the manufacturing of the charging and swapping liquid cooling device 100 is completed.

[0048] In this embodiment, the working process of the battery exchange liquid cooling device 100 is:

[0049] The battery pack 200 is pushed into the battery compartment 10 . At this time, the charging port of the battery pack 200 is electrically and communicatively connected with the socket 11 of the battery compartment 10 , so that the battery pack 200 is charged.

[0050] The control unit controls the lifting mechanism 30 to operate, so that the liquid cooling plate 20 descends, and the liquid cooling plate 20 presses the battery pack 200 tightly.

[0051] When the temperature of the battery pack 200 exceeds a first predetermined threshold, the control unit controls the coolant storage tank to operate, thereby starting the coolant to heat or cool the battery pack 200 .

[0052] When the temperature of the battery pack 200 exceeds a second predetermined threshold, the control unit first controls the relay on the charging power line to disconnect, and then controls the fire-fighting fluid storage tank to start working, thereby starting the fire-fighting fluid to perform water spraying to extinguish the fire and cool the battery pack 200.

[0053] Example Function and Effect

[0054] According to the charging and swapping liquid cooling device involved in this embodiment, since it has a liquid cooling plate and a lifting mechanism, the lifting mechanism can drive the liquid cooling plate to lift relative to the battery compartment, and the lifting mechanism drives the liquid cooling plate to descend, so that the liquid cooling plate is tightly attached to the upper surface of the battery pack. The interior of the liquid cooling plate is formed with a cooling liquid channel and a fire liquid channel that are separated from each other and connected to the cooling liquid storage tank and the fire liquid storage tank through pipes respectively. The lower surface of the liquid cooling plate is provided with a plurality of spray ports that are respectively connected to the fire liquid channels, so that in addition to heating or cooling the battery pack, the liquid cooling plate can also continuously spray water to extinguish fire and cool it when thermal runaway occurs in the battery pack, which effectively solves the charging safety problem of the battery pack.

[0055] In addition, because the cooling liquid channel is located in the middle of the liquid cooling plate, and the fire-fighting liquid channel is located at the edges of the left and right sides and the front end of the liquid cooling plate, the structural layout is more reasonable.

[0056] In addition, because the lifting mechanism includes four lifting push rods and four return springs that are arranged corresponding to each other, every two lifting push rods and the corresponding two return springs are arranged on a side portion of the battery compartment, the lifting push rods are used to drive the liquid cooling plate to rise when the battery pack is not placed in the battery compartment, thereby putting the battery compartment in an unlocked state, and the return springs are used to pull the liquid cooling plate back and press it tightly against the upper surface of the battery pack when the battery pack is placed in the battery compartment and the lifting push rods unload the force, thereby putting the battery compartment in an interlocked state. The structure is simple and easy to manufacture, and the stability and reliability of the lifting of the liquid cooling plate are further improved.

[0057] The above-mentioned embodiments are preferred examples of the present invention and are not intended to limit the protection scope of the present invention.

Claims

1. A charging and swapping liquid cooling device, characterized in that: include: A battery compartment, used to detachably contain a battery pack having a heat dissipation housing, with both the top and the front being open; A liquid cooling plate, which is liftably arranged on the top of the battery compartment; as well as A lifting mechanism, disposed on the battery compartment and connected to the liquid cooling plate, for driving the liquid cooling plate to perform lifting actions relative to the battery compartment; The liquid cooling plate has a cooling liquid channel and a fire-fighting liquid channel formed inside, which are separated from each other and connected to the cooling liquid storage tank and the fire-fighting liquid storage tank through pipelines, respectively. The lower surface of the liquid cooling plate is provided with a plurality of spray ports respectively connected to the fire-fighting liquid channels. The front of the battery pack has a charging port, The inner rear portion of the battery compartment is provided with a socket that matches the charging port and is connected to an external power source through a charging power line. When the battery pack is placed in the battery compartment, the charging port is electrically and communicatively connected to the socket. The lifting mechanism drives the liquid cooling plate to descend so that the liquid cooling plate is closely attached to the upper surface of the battery pack.

2. The battery charging and swapping liquid cooling device according to claim 1, characterized in that: in, The cooling liquid channel is located in the middle of the liquid cooling plate. The fire-fighting liquid channel is located at the edges of the left and right sides and the front end of the liquid cooling plate.

3. The charging and swapping liquid cooling device according to claim 2 is characterized in that: in, The rear end portion of the liquid cooling plate is provided with a cooling liquid inlet and a cooling liquid outlet respectively connected to the cooling liquid channel, and a fire-fighting liquid inlet respectively connected to the fire-fighting liquid channel.

4. The battery charging and swapping liquid cooling device according to claim 1, characterized in that: in, A relay is installed in series on the charging power line.

5. The charging and swapping liquid cooling device according to claim 1 is characterized in that: in, The heat dissipation housing is made of a material with low density, high strength and a thermal conductivity of ≥2W / (m·K).

6. The battery charging and swapping liquid cooling device according to claim 1, characterized in that: in, The spray port at the edge of the liquid cooling plate has an inclination angle.

7. The battery charging and swapping liquid cooling device according to claim 1, characterized in that: in, The lifting mechanism comprises four lifting push rods and four return springs which are arranged corresponding to each other. Every two of the lifting push rods and the corresponding two return springs are arranged on a side of the battery compartment, The lifting push rod is used to drive the liquid cooling plate to rise when the battery pack is not placed in the battery compartment, so that the battery compartment is in an unlocked state. The return spring is used to pull the liquid cooling plate back and press it tightly against the upper surface of the battery pack when the battery pack is placed in the battery compartment and the lifting push rod unloads the force, thereby putting the battery compartment in an interlocked state.

8. A method for manufacturing a charging and swapping liquid cooling device, characterized in that: The following steps are involved: Install a lifting mechanism on the battery compartment; Installing the liquid cooling plate on the lifting mechanism; Use pipelines to connect the coolant inlet and coolant outlet on the liquid cooling plate and the fire-fighting liquid inlet respectively; Install the socket on the inner rear of the battery compartment; A relay is installed in series on the charging power line connected to the socket, thereby completing the manufacture of the charging and swapping liquid cooling device.

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