CTC battery pack anti-corrosion structure and vehicle

Abstract

The utility model provides a CTC battery pack anti-corrosion structure which comprises a vehicle body floor with a cavity in the bottom and a direct cooling plate arranged on the vehicle body floor, the direct cooling plate covers the cavity in a sealing mode, and heat preservation cotton is arranged on the side, facing the cavity, of the direct cooling plate. An air inlet channel and an exhaust channel are arranged on the vehicle body floor and both communicated with the external environment and the cavity, a drying device used for drying inflow air is arranged on the air inlet channel, and an exhaust valve used for controlling on-off of the exhaust channel is arranged on the exhaust channel. The cavity is formed between the vehicle body floor and the direct cooling plate, damp water vapor can be exhausted in time through cooperation of the air inlet channel and the exhaust channel, and the problem of condensation corrosion is solved.

Description

Technical Field

[0001] The utility model relates to the technical field of batteries, and in particular to a CTC battery pack anti-corrosion structure. Meanwhile, the utility model also relates to a vehicle integrated with the CTC battery pack anti-corrosion structure. Background Art

[0002] Currently, the existing direct cooling plate is usually arranged on the top of the battery pack, and a thick thermal insulation cotton is pasted on the outer layer to insulate the direct cooling plate. Since the flow channel of the direct cooling plate is partially raised, the thermal insulation cotton and the direct cooling plate are not completely fitted, and there is some air between the direct cooling plate and the thermal insulation cotton.

[0003] When the entire direct cooling plate and thermal insulation cotton are exposed to a high temperature, high humidity and high salt environment, due to the low working temperature of the refrigerant of the direct cooling plate, on the one hand, there is a possibility that the direct cooling plate will directly contact the high temperature, high humidity and high salt environment, and condensation will directly occur on the surface of the direct cooling plate. On the other hand, condensation is prone to occur on the surface of the thermal insulation cotton in contact with the high temperature and high humidity air. The condensation is not easy to discharge and is not easy to evaporate in a high humidity and windless environment. The high salt environment causes the condensation to contain salt, and eventually the condensation gradually penetrates into the interior of the thermal insulation cotton. Once it penetrates into the interior of the thermal insulation cotton, it is not easy to dissipate. Electrochemical corrosion occurs at the contact interface between the direct cooling plate and the thermal insulation cotton to form perforations, causing the direct cooling plate to fail.

[0004] At present, anti-corrosion coating is sprayed on the surface of direct cooling plate to deal with corrosion problem, but anti-corrosion coating can only delay corrosion. In the case of long-term corrosion or local high-concentration salt spray corrosion, corrosion will still penetrate the spray coating and cause failure of direct cooling plate. Utility Model Content

[0005] In view of this, the utility model aims to propose a CTC battery pack anti-corrosion structure to solve the condensation corrosion problem of the direct cooling plate.

[0006] In order to achieve the above object, the technical solution of the utility model is implemented as follows:

[0007] A CTC battery pack anti-corrosion structure comprises a vehicle body floor having a cavity at the bottom, and a direct cooling plate arranged on the vehicle body floor, the direct cooling plate covers the cavity, and a side of the direct cooling plate facing the cavity is provided with thermal insulation cotton;

[0008] An air intake channel and an exhaust channel are provided on the vehicle body floor, both of which connect the external environment and the cavity, and a drying device for drying the inflowing air is provided on the air intake channel, and an exhaust valve for controlling its own on and off is provided on the exhaust channel.

[0009] Furthermore, the air intake passage is provided with an air intake valve located upstream of the drying device, and the air intake valve is used to control the opening and closing of the air intake passage.

[0010] Furthermore, the exhaust channel includes a first sub-channel and a second sub-channel arranged side by side, and the second sub-channel is provided with an exhaust unit for exhausting air; the exhaust valve adopts a three-way switching valve, the inlet of the exhaust valve is connected to the cavity, and the two outlets of the exhaust valve are respectively connected to the first sub-channel and the second sub-channel.

[0011] Furthermore, a dehumidification unit is provided in the second sub-channel, a drainage pipe of the dehumidification unit passes through and extends out of the second sub-channel, and the dehumidification unit is used to condense moisture in the air into liquid water and then discharge it through the drainage pipe.

[0012] Furthermore, it also includes a detection unit arranged on the vehicle body floor, and the detection unit is used to detect the temperature and humidity conditions in the cavity.

[0013] Furthermore, it also includes a control unit, which is connected to the detection unit, the air intake valve, the exhaust valve, the exhaust unit and the dehumidification unit; the control unit can respond to the detection signal of the detection unit to control the operation of the air intake valve, the exhaust valve, the exhaust unit or the dehumidification unit.

[0014] Furthermore, it also includes a sealing member, which is used to form a seal between the vehicle body floor and the direct cooling plate.

[0015] Furthermore, the sealing member extends along the circumference of the direct cooling plate, and the sealing member is arranged close to the edge of the direct cooling plate.

[0016] Furthermore, the thermal insulation cotton is arranged on the inner side of the sealing component, and the thermal insulation cotton at least covers the portion of the direct cooling plate exposed in the cavity.

[0017] Compared with the prior art, the utility model has the following advantages:

[0018] The CTC battery pack anti-corrosion structure described in the utility model can discharge the humid air in the cavity in time by forming a cavity between the vehicle body floor and the direct cooling plate and by providing an air intake channel and an exhaust channel connecting the cavity. A drying device is also provided on the air intake channel to dry the air entering the cavity, thereby solving the condensation corrosion problem on the surface of the direct cooling plate.

[0019] In addition, the setting of the air intake valve makes the air intake process controllable, so that it can intake air when needed and close when not needed, which is conducive to controlling the air intake volume. A three-way valve is provided on the exhaust channel and connects the two branches of the first branch channel and the second branch channel. The channel can be switched according to different working conditions, and an exhaust unit is provided on the second branch channel. With the cooperation of the air intake valve in the closed state, the humid air in the cavity can be quickly extracted to increase the dehumidification efficiency. The dehumidification unit can condense the water vapor into liquid water and discharge it when the humidity of the exhaust gas is too high, so as to reduce the generation of condensation on the surface of the direct cooling plate.

[0020] In addition, the setting of the detection unit is conducive to monitoring the situation inside the cavity. By monitoring the internal situation, the operation status of the equipment can be inferred. Therefore, the humidity of the air inside the cavity can be accurately adjusted by controlling the exhaust unit, the dehumidification unit and each valve body to ensure the dryness of the air inside the cavity. The control unit is connected to the detection unit, the air intake valve, the exhaust valve, the exhaust unit and the dehumidification unit, which is conducive to automatic control. The seal can strengthen the airtightness of the cavity between the vehicle body floor and the direct cooling plate to prevent humid air from flowing into other parts. The seal is set close to the edge, which has a simple structure and is not easy to accumulate dust between the direct cooling plate and the vehicle body floor, preventing equipment failure caused by dust accumulation. The thermal insulation cotton at least covers the part of the direct cooling plate exposed in the cavity, which can reduce the temperature change of the direct cooling plate caused by air flow in the cavity, which is conducive to design implementation.

[0021] Another object of the present invention is to provide a vehicle, wherein the CTC battery pack anti-corrosion structure is integrated on the vehicle body. The vehicle of the present invention has the same beneficial effects as the CTC battery pack anti-corrosion structure described above relative to the prior art, which will not be described in detail here. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The accompanying drawings constituting a part of the present invention are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation on the present invention. In the accompanying drawings:

[0023] Figure 1 This is a schematic diagram of the structure of the CTC battery pack anti-corrosion structure according to the first embodiment of the present utility model;

[0024] Figure 2 This is a structural schematic diagram of the first mode of the CTC battery pack anti-corrosion structure according to the first embodiment of the present utility model;

[0025] Figure 3 This is a structural schematic diagram of the second mode of the CTC battery pack anti-corrosion structure according to the first embodiment of the present utility model;

[0026] Figure 4This is a structural schematic diagram of mode 3 of the CTC battery pack anti-corrosion structure according to the first embodiment of the present utility model;

[0027] Description of reference numerals:

[0028] 1. Car body floor; 2. Cavity; 3. Direct cooling plate; 4. Air intake channel;

[0029] 5. Exhaust channel; 501. First sub-channel; 502. Second sub-channel;

[0030] 6. Drying device; 7. Exhaust valve; 8. Intake valve; 9. Exhaust unit; 10. Dehumidification unit; 11. Drain pipe; 12. Detection unit; 13. Sealing element; 14. Thermal insulation cotton. DETAILED DESCRIPTION

[0031] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features in the embodiments can be combined with each other.

[0032] In the description of the present invention, it should be noted that if there are terms such as "upper", "lower", "inner", "outer" and the like indicating orientation or positional relationship, they are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, if there are terms such as "first" and "second", they are also used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0033] In addition, it should be noted that the CTC mentioned in the description of the present invention refers to a battery pack that directly uses the vehicle body as the upper and lower covers of the battery pack, and the vehicle ECU refers to the on-board computer.

[0034] In addition, in the description of the present invention, unless otherwise clearly defined, the terms "installation", "connection", "connection" and "connector" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood in combination with specific circumstances.

[0035] The present invention will be described in detail below with reference to the accompanying drawings and in combination with embodiments.

[0036] Embodiment 1

[0037] The present embodiment relates to a CTC battery pack anti-corrosion structure, which can discharge humid air through the cooperation of an air intake channel and an exhaust channel, and can solve the condensation corrosion problem on the surface of the direct cooling plate at least when the vehicle is moving.

[0038] In terms of overall structure, combined Figure 1 As shown, the CTC battery pack anti-corrosion structure of this embodiment includes a vehicle body floor 1 having a cavity 2 at the bottom, and a direct cooling plate 3 arranged on the vehicle body floor 1, the direct cooling plate 3 covers the cavity 2, and the side of the direct cooling plate 3 facing the cavity 2 is provided with thermal insulation cotton.

[0039] It should be noted that the CTC battery pack mentioned in this embodiment is called Cell to Chassis, which means a battery pack that uses the vehicle body as the upper and lower covers of the battery pack. It can also be understood as a battery pack that is directly installed on the vehicle body.

[0040] Among them, an intake channel 4 and an exhaust channel 5 are provided on the vehicle body floor 1, both of which connect the external environment and the cavity 2, and the intake channel 4 is provided with a drying device 6 for drying the incoming air, and the exhaust channel 5 is provided with an exhaust valve 7 for controlling its own on and off.

[0041] At this time, as set above, a cavity 2 is formed between the vehicle body floor 1 and the direct cooling plate 3 of this embodiment, and by setting a connected air intake channel 4 and an exhaust channel 5, the humid air in the cavity 2 can be discharged in time, and a drying device 6 is also provided on the air intake channel 4 to dry the air entering the cavity 2, thereby solving the condensation corrosion problem on the surface of the direct cooling plate 3.

[0042] Based on the above overall introduction, Figure 1 As shown, the air intake passage 4 of this embodiment is provided with an air intake valve 8 located upstream of the drying device 6. The air intake valve 8 is used to control the on-off of the air intake passage 4. The setting of the air intake valve 8 makes the air intake process controllable, so that it can intake air when needed and close when not needed, which is conducive to controlling the air intake amount.

[0043] It should be noted that, in this embodiment, “located upstream” refers to being located in front along the air intake direction. Similarly, “located downstream” refers to being located in the rear along the air intake direction.

[0044] Furthermore, as a preferred implementation form, the exhaust channel 5 of this embodiment includes a first sub-channel 501 and a second sub-channel 502 arranged side by side, and the second sub-channel 502 is provided with an exhaust unit 9 for exhausting air.

[0045] Specifically, the exhaust valve 7 adopts a three-way switching valve, the inlet of the exhaust valve 7 is connected to the cavity 2, and the two outlets of the exhaust valve 7 are respectively connected to the first sub-channel 501 and the second sub-channel 502. A three-way valve is provided on the exhaust channel 5 and connects the two branches of the first sub-channel 501 and the second sub-channel 502. The passage can be switched according to different working conditions, and an exhaust unit 9 is provided on the second sub-channel 502. With the cooperation of the air intake valve 8 in the closed state, the humid air in the cavity 2 can be quickly extracted to increase the dehumidification efficiency.

[0046] In addition, as a preferred implementation form, a dehumidification unit 10 is provided in the second sub-channel 502 in this embodiment. The drain pipe 11 of the dehumidification unit 10 passes through and extends out of the second sub-channel 502, and the dehumidification unit 10 is used to condense the moisture in the air into liquid water and discharge it through the drain pipe 11. The dehumidification unit 10 can condense the water vapor into liquid water and discharge it when the humidity of the exhaust gas is too high, so as to reduce the generation of condensation on the surface of the direct cooling plate 3.

[0047] In addition, as a preferred implementation form, the CTC battery pack anti-corrosion structure in this embodiment also includes a detection unit 12 arranged on the vehicle body floor 1, and the detection unit 12 is used to detect the temperature and humidity conditions in the cavity 2. The detection unit 12 in this embodiment is a temperature and humidity sensor. The setting of the detection unit 12 is conducive to monitoring the conditions in the cavity 2. By monitoring the internal conditions, the operation conditions of the equipment can be inferred. Therefore, the air humidity inside the cavity can be accurately adjusted by controlling the exhaust unit, the dehumidification unit and each valve body to ensure the dryness of the air inside the cavity.

[0048] Preferably, the CTC battery pack anti-corrosion structure in this embodiment also includes a control unit, which is connected to the detection unit 12, the air intake valve 8, the exhaust valve 7, the exhaust unit 9 and the dehumidification unit 10.

[0049] It can be understood that the control unit can respond to the detection signal of the detection unit 12 to control the operation of the intake valve 8, the exhaust valve 7, the exhaust unit 9 or the dehumidification unit 10, and the control unit is connected to the detection unit 12, the intake valve 8, the exhaust valve 7, the exhaust unit 9 and the dehumidification unit 10, which is conducive to realizing automatic control.

[0050] The control unit in this embodiment can be connected to the vehicle ECU to receive the vehicle speed signal, and can feed back the temperature and humidity signals in the cavity 2 to the vehicle ECU. Here, the vehicle ECU mentioned has its common meaning, that is, the vehicle computer.

[0051] It should be noted that when this embodiment is in operation, the humidity in the cavity 2 between the vehicle body floor 1 and the direct cooling plate 3 can be maintained below a limited value. When the humidity detected by the temperature and humidity sensor exceeds the limited value for a certain period of time, it proves that the desiccant in the drying device 6 has failed. At this time, the desiccant in the drying device 6 needs to be replaced.

[0052] In addition, as a preferred implementation form, the CTC battery pack anti-corrosion structure of this embodiment also includes a seal 13, which is used to form a seal between the vehicle body floor 1 and the direct cooling plate 3. The seal 13 can strengthen the airtightness of the cavity 2 between the vehicle body floor 1 and the direct cooling plate 3 to prevent humid air from flowing into other parts.

[0053] Specifically, the seal 13 in this embodiment extends along the circumference of the direct cooling plate 3, and the seal 13 is arranged close to the edge of the direct cooling plate 3. The seal 13 is arranged close to the edge, which has a simple structure and is not easy to accumulate dust between the direct cooling plate 3 and the vehicle body floor 1, thereby preventing equipment failure caused by dust accumulation.

[0054] Furthermore, as a preferred implementation form, the thermal insulation cotton 14 in this embodiment is arranged on the inner side of the sealing member 13, and the thermal insulation cotton 14 at least covers the portion of the direct cooling plate 3 exposed in the cavity 2. The provision of the thermal insulation cotton 14 can reduce the temperature change of the direct cooling plate 3 caused by air flow, which is beneficial to the design implementation.

[0055] This embodiment has multiple working modes when in use, specifically:

[0056] Mode 1: Figure 2 As shown, in the driving mode, after the detection unit 12 detects that the humidity between the vehicle body floor 1 and the direct cooling plate 3 exceeds the limit value, the air intake valve 8 opens, and with the help of the air flow during driving, the external air flows into the air intake, passes through the drying device 6, and enters the cavity 2 between the vehicle body floor 1 and the direct cooling plate 3. At this time, the exhaust valve 7 switches to close the second sub-channel 502 and open the first sub-channel 501 to blow away the humid air in the cavity 2.

[0057] Mode 2: Figure 3 As shown, in the vehicle stationary mode, after the detection unit 12 detects that the humidity between the vehicle body floor 1 and the direct cooling plate 3 exceeds the limit value, the exhaust valve 7 switches the branch, closes the first sub-channel 501, opens the second sub-channel 502, and the exhaust unit 9 starts and opens the air intake valve 8 at the same time. At this time, the exhaust unit 9 draws out the humid air in the cavity 2.

[0058] Mode 3: Figure 4As shown, when the detection unit 12 detects that the humidity between the vehicle body floor 1 and the direct cooling plate 3 exceeds the limit value for a long time, the drying device 6 is judged to be failed through the opening and closing signal of the combined intake valve 8. At this time, the exhaust valve 7 switches the branch, closes the first branch channel 501, opens the second branch channel 502, and the exhaust unit 9 is started. At the same time, the intake valve 8 is closed. The exhaust unit 9 draws away the humid air in the cavity 2, turns it into condensed water, and discharges it through the drain pipe 11.

[0059] Embodiment 2

[0060] This embodiment relates to a vehicle, in which the CTC battery pack anti-corrosion structure described in Embodiment 1 is provided. The vehicle of this embodiment, by adopting the CTC battery pack anti-corrosion structure in Embodiment 1, can solve the condensation corrosion problem on the surface of the direct cooling plate, thereby extending the service life of the direct cooling plate.

[0061] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A CTC battery pack anti-corrosion structure, characterized in that: It comprises a vehicle body floor with a cavity at the bottom, and a direct cooling plate arranged on the vehicle body floor, the direct cooling plate covers the cavity, and a side of the direct cooling plate facing the cavity is provided with thermal insulation cotton; An air intake channel and an exhaust channel are provided on the vehicle body floor, both of which connect the external environment and the cavity, and a drying device for drying the inflowing air is provided on the air intake channel, and an exhaust valve for controlling its own on and off is provided on the exhaust channel.

2. The CTC battery pack anti-corrosion structure according to claim 1, characterized in that: The air intake passage is provided with an air intake valve located upstream of the drying device, and the air intake valve is used to control the opening and closing of the air intake passage.

3. The CTC battery pack anti-corrosion structure according to claim 2, characterized in that: The exhaust channel comprises a first sub-channel and a second sub-channel arranged side by side, and the second sub-channel is provided with an exhaust unit for exhausting air; The exhaust valve is a three-way switching valve, the inlet of the exhaust valve is connected to the cavity, and the two outlets of the exhaust valve are connected to the first sub-channel and the second sub-channel respectively.

4. The CTC battery pack anti-corrosion structure according to claim 3, characterized in that: A dehumidification unit is provided in the second sub-channel, a drainage pipe of the dehumidification unit passes through and extends out of the second sub-channel, and the dehumidification unit is used to condense moisture in the air into liquid water and then discharge it through the drainage pipe.

5. The CTC battery pack anti-corrosion structure according to claim 4, characterized in that: It also includes a detection unit arranged on the vehicle body floor, and the detection unit is used to detect the temperature and humidity conditions in the cavity.

6. The CTC battery pack anti-corrosion structure according to claim 5, characterized in that: It also includes a control unit, which is connected to the detection unit, the air intake valve, the air exhaust valve, the air extraction unit and the dehumidification unit; The control unit can respond to the detection signal of the detection unit to control the operation of the intake valve, the exhaust valve, the exhaust unit or the dehumidification unit.

7. The CTC battery pack anti-corrosion structure according to any one of claims 1 to 6, characterized in that: A sealing member is also included, and the sealing member is used to form a seal between the vehicle body floor and the direct cooling plate.

8. The CTC battery pack anti-corrosion structure according to claim 7, characterized in that: The sealing member extends along the circumference of the direct cooling plate, and the sealing member is arranged close to the edge of the direct cooling plate.

9. The CTC battery pack anti-corrosion structure according to claim 8, characterized in that: The thermal insulation cotton is arranged on the inner side of the sealing component, and the thermal insulation cotton at least covers the portion of the direct cooling plate exposed in the cavity.

10. A vehicle, characterized in that: The CTC battery pack anti-corrosion structure according to any one of claims 1 to 9 is integrated on the body of the vehicle.

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