Range-extending type automobile with standby battery

Abstract

The utility model discloses an extended-range automobile with a standby battery, and belongs to the technical field of automobiles. The defect that in the prior art, a standby battery on an extended-range automobile is lack of a heat exchange device is overcome. The system mainly comprises a main battery, a main battery heat exchange tube is installed on the main battery and connected with a heat exchange loop, the system further comprises a standby battery, a standby battery heat exchange tube is installed on the standby battery, and the standby battery heat exchange tube is connected with the heat exchange loop and connected with the main battery heat exchange tube in series through the heat exchange loop.

Description

Technical Field

[0001] The utility model belongs to the technical field of automobiles, and in particular relates to an extended-range automobile carrying a spare battery. Background Art

[0002] Currently, many extended-range vehicles are equipped with backup batteries, which are mainly used to charge the main battery and drive the vehicle for emergency use after the main battery is exhausted. The backup batteries in current extended-range vehicles lack heat exchange devices and are mainly cooled by natural cooling. They are prone to high-temperature thermal runaway during operation, which poses a great safety risk to the use of backup batteries. Moreover, under the influence of the battery's high temperature limit, it will also lead to the problem of inability to sustain large current discharge. Summary of the invention

[0003] In view of the above problems, the utility model aims to provide an extended-range vehicle carrying a spare battery, so as to overcome the defect that the spare battery on the extended-range vehicle in the prior art lacks a heat exchange device.

[0004] The utility model is implemented by adopting the following technical scheme: a range-extended vehicle carrying a spare battery, comprising a main battery, a main battery heat exchange tube is installed on the main battery, the main battery heat exchange tube is connected to a heat exchange circuit, and also comprises a spare battery, a spare battery heat exchange tube is installed on the spare battery, the spare battery heat exchange tube is connected to the heat exchange circuit and is connected in series with the main battery heat exchange tube through the heat exchange circuit.

[0005] Furthermore, the water outlet of the main battery heat exchange tube is connected to the water inlet of the backup battery heat exchange tube, and the water outlet of the backup battery heat exchange tube is connected to the water inlet of the main battery heat exchange tube through a heat exchange loop.

[0006] Furthermore, the heat exchange circuit includes a liquid inlet pipeline and a liquid outlet pipeline, the liquid inlet pipeline is connected to the cooling pipeline and the heating pipeline respectively through a three-way valve, the liquid outlet pipeline is connected to the cooling pipeline and the heating pipeline respectively through a three-way valve, a chiller heat exchanger is provided on the cooling pipeline, and a liquid-liquid heat exchanger is provided on the heating pipeline; a water pump is also installed on the heat exchange circuit.

[0007] Furthermore, the backup battery is mounted on the frame of the vehicle body via a tray, the tray comprises a trapezoidal tray seat, and the tray seat is fixedly mounted on the frame of the vehicle body via a plurality of vertical beams.

[0008] Furthermore, the backup battery includes a shell, the shell includes an upper battery layer and a lower battery layer, the upper battery layer and the lower battery layer are both provided with a plurality of battery modules, and the backup battery heat exchange tube is between the upper battery layer and the lower battery layer.

[0009] Furthermore, the upper battery layer in the backup battery is installed with a battery controller and four battery modules, and the lower battery layer in the backup battery is installed with four battery modules.

[0010] Furthermore, the backup battery heat exchange tube is in a coil shape, and the water inlet and outlet of the backup battery heat exchange tube are both arranged on the side of the shell close to the main battery.

[0011] Furthermore, the backup battery is connected to the main battery and the drive motor through PDU and DCDC respectively.

[0012] Furthermore, the backup battery is a ternary lithium-ion battery.

[0013] Compared with the prior art, the beneficial effects of the utility model are:

[0014] The utility model solves the problem that the backup battery on the current new energy vehicle has no effective cooling and heating device by installing a backup battery heat exchange tube on the backup battery. By connecting the backup battery heat exchange tube in series with the main battery heat exchange tube, when the heat exchange circuit exchanges heat for the main battery, it also exchanges heat for the backup battery, so that the backup battery is always in the best working state. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the heat exchange circuit of the utility model;

[0016] Figure 2 It is a schematic diagram of the arrangement of the main battery and the backup battery of the utility model;

[0017] Figure 3 It is a schematic diagram of the tray of the utility model;

[0018] Figure 4 It is a schematic diagram of the backup battery of the utility model.

[0019] In the figure: 1. main battery; 2. water pump; 3. heat exchange circuit; 4. backup battery; 5. backup battery heat exchange tube; 6. liquid inlet pipeline; 7. liquid outlet pipeline; 8. three-way valve; 9. cooling pipeline; 10. heating pipeline; 11. chiller heat exchanger; 12. liquid-liquid heat exchanger; 13. tray seat; 14. vertical beam; 15. shell; 16. battery module. DETAILED DESCRIPTION

[0020] In order to enable those skilled in the art to better understand the technical solutions in the present invention, the following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present invention.

[0021] An extended-range vehicle carrying a spare battery comprises a main battery 1, on which a main battery heat exchange tube is installed, which is connected to a heat exchange circuit 3, and a spare battery 4, on which a spare battery heat exchange tube 5 is installed, which is connected to the heat exchange circuit 3 and connected in series with the main battery heat exchange tube through the heat exchange circuit 3. The water outlet of the main battery heat exchange tube is connected to the water inlet of the spare battery heat exchange tube 5, and the water outlet of the spare battery heat exchange tube 5 is connected to the water inlet of the main battery heat exchange tube through the heat exchange circuit 3, so that the heat exchange medium in the heat exchange circuit 3 passes through the main battery 1 first and then the spare battery.

[0022] The backup battery 4 of the utility model is installed on the frame near the main battery 1, so that the connecting pipeline between the main battery 1 and the backup battery 4 is shorter, and there is no need to add a large number of additional connecting pipelines. Not only is the structure simple and convenient for pipeline layout, but also energy loss is reduced.

[0023] The utility model solves the problem that the backup battery 4 on the current new energy vehicle has no effective cooling and heating structure by installing a backup battery heat exchange tube 5 on the backup battery 4. By connecting the backup battery heat exchange tube 5 in series with the main battery heat exchange tube, when the heat exchange circuit 3 exchanges heat with the main battery 1, it will also exchange heat with the backup battery 4, so that the backup battery 4 is always in the best working state. When the backup battery 4 is working, the heat exchange circuit 3 can adjust the opening and closing of the three-way valve 8 on the heat exchange circuit 3 according to the sensed temperature of the temperature sensor on the backup battery 4.

[0024] The heat exchange circuit 3 includes a liquid inlet pipeline 6 and a liquid outlet pipeline 7. The liquid inlet pipeline 6 is connected to a cooling pipeline 9 and a heating pipeline 10 respectively through a three-way valve 8. The liquid outlet pipeline 7 is connected to a cooling pipeline 9 and a heating pipeline 10 respectively through a three-way valve 8. A chiller heat exchanger 11 is provided on the cooling pipeline 9, and a liquid-liquid heat exchanger 12 is provided on the heating pipeline 10. A water pump 2 is also installed on the heat exchange circuit 3.

[0025] The liquid-liquid heat exchanger 12 of the utility model realizes heating of the heat exchange medium in the heat exchange loop 3, and the chiller heat exchanger 11 realizes cooling of the heat exchange medium in the heat exchange loop 3. The chiller heat exchanger 11 is connected to the cooling circulation loop in the vehicle body, and the chiller heat exchanger 11 cools down the heat exchange loop 3 through the cooling circulation loop on the vehicle to realize heat exchange; the liquid-liquid heat exchanger 12 is connected to the heating circulation loop on the vehicle, and the liquid-liquid heat exchanger 12 heats the heat exchange loop 3 through the heating circulation loop to realize heat exchange. When the main battery 1 is working and the temperature sensor thereon detects a high temperature, or when the backup battery 4 is working and the temperature sensor thereon detects a high temperature, the controller connects the cooling line 9 with the liquid inlet line 6 and the liquid outlet line 7 through the three-way valve 8, and the heating line 10 is not connected with the liquid inlet line 6 and the liquid outlet line 7. The chiller heat exchanger 11 cools the heat exchange circuit 3, and then forces the main battery 1 to be cooled through the main battery heat exchange pipe, and the backup battery heat exchange pipe 5 forces the backup battery 4 to be cooled. Similarly, when the main battery 1 is working and the temperature sensor thereon detects a low temperature, or when the backup battery 4 is working and the temperature sensor thereon detects a low temperature, the controller connects the heating line 10 with the liquid inlet line 6 and the liquid outlet line 7 through the three-way valve 8, and the cooling line 9 is not connected with the liquid inlet line 6 and the liquid outlet line 7. The liquid-liquid heat exchanger 12 heats the heat exchange circuit 3, and then the main battery heat exchange pipe heats the main battery 1, and the backup battery heat exchange pipe 5 heats the backup battery 4. In the utility model, the main battery 1 and the backup battery 2 are respectively installed with temperature sensors. When the main battery 1 is working, the controller can control the opening and closing of the three-way valve 8 on the heat exchange circuit 3 according to the detection information of the temperature sensor on the main battery 1. When the backup battery 4 is working, the controller can control the opening and closing of the three-way valve 8 on the heat exchange circuit 3 according to the detection information of the temperature sensor on the backup battery 4. One of the two three-way valves 8 adopts a three-way proportional valve. A water pump 2 is also installed on the heat exchange circuit 3, and the water pump 2 drives the circulation of the heat exchange medium in the heat exchange circuit 3.

[0026] The backup battery 4 is mounted on the frame of the vehicle body via a tray. The tray includes a trapezoidal tray seat 13 . The tray seat 13 is fixedly mounted on the frame of the vehicle body via a plurality of vertical beams 14 .

[0027] The backup battery 4 of the utility model is arranged near the middle channel of the vehicle body and right in front of the main battery 1 , so that the backup battery 4 is installed near the main battery 1 .

[0028] The backup battery 4 includes a shell 15, and the shell 15 includes an upper battery layer and a lower battery layer. The upper battery layer and the lower battery layer are both provided with a plurality of battery modules 16, and the backup battery heat exchange tube 5 is between the upper battery layer and the lower battery layer.

[0029] The utility model can conveniently exchange heat between the battery modules 16 on the upper and lower battery layers by placing the spare battery heat exchange tube 5 between the upper and lower battery layers, and the housing 15 can be provided with a bracket between the upper and lower battery layers.

[0030] The upper battery layer in the backup battery 4 is installed with a battery controller and four battery modules 16 , and the lower battery layer in the backup battery 4 is installed with four battery modules 16 .

[0031] The standby battery heat exchange tube 5 is in a coil shape, and the water inlet and the water outlet of the standby battery heat exchange tube 5 are both arranged on the side of the shell 15 close to the main battery 1 .

[0032] The backup battery 4 is connected to the main battery 1 and the drive motor through the PDU and DCDC respectively.

[0033] When the power of the main battery 1 is exhausted, the backup battery 4 of the utility model can directly supply power to the drive motor through the PDU and DCDC to meet the daily driving needs of the vehicle. The main battery 1 can distribute power to the backup battery 4 through the PDU and DCDC, that is, the main battery 1 charges the backup battery 4, ensuring that the power of the backup battery 4 is always kept in a healthy state, and accurately estimating the state of charge for emergency use.

[0034] The backup battery 4 is a ternary lithium-ion battery.

Claims

1. An extended-range vehicle carrying a backup battery, comprising a main battery (1), a main battery heat exchange tube installed on the main battery (1), the main battery heat exchange tube being connected to a heat exchange circuit (3), characterized in that: It also includes a backup battery (4), on which a backup battery heat exchange tube (5) is installed, and the backup battery heat exchange tube (5) is connected to the heat exchange circuit (3) and is connected in series with the main battery heat exchange tube through the heat exchange circuit (3).

2. The extended-range vehicle with a backup battery according to claim 1, characterized in that: The water outlet of the main battery heat exchange tube is connected to the water inlet of the backup battery heat exchange tube (5), and the water outlet of the backup battery heat exchange tube (5) is connected to the water inlet of the main battery heat exchange tube via a heat exchange circuit (3).

3. The extended-range vehicle with a backup battery according to claim 1, characterized in that: The heat exchange circuit (3) comprises a liquid inlet pipeline (6) and a liquid outlet pipeline (7); the liquid inlet pipeline (6) is respectively connected to a cooling pipeline (9) and a heating pipeline (10) via a three-way valve (8); the liquid outlet pipeline (7) is respectively connected to a cooling pipeline (9) and a heating pipeline (10) via a three-way valve (8); a chiller heat exchanger (11) is provided on the cooling pipeline (9), and a liquid-liquid heat exchanger (12) is provided on the heating pipeline (10); a water pump (2) is also installed on the heat exchange circuit (3).

4. The extended-range vehicle with a backup battery according to claim 1, characterized in that: The backup battery (4) is mounted on the frame of the vehicle body via a tray, the tray comprising a trapezoidal tray seat (13), and the tray seat (13) is fixedly mounted on the frame of the vehicle body via a plurality of vertical beams (14).

5. The extended-range vehicle with a backup battery according to claim 1, characterized in that: The backup battery (4) comprises a shell (15), the shell (15) comprising an upper battery layer and a lower battery layer, the upper battery layer and the lower battery layer are both provided with a plurality of battery modules (16), and the backup battery heat exchange tube (5) is between the upper battery layer and the lower battery layer.

6. The extended-range vehicle with a backup battery according to claim 5, characterized in that: The upper battery layer in the backup battery (4) is installed with a battery controller and four battery modules (16), and the lower battery layer in the backup battery (4) is installed with four battery modules (16).

7. The extended-range vehicle with a backup battery according to claim 5, characterized in that: The standby battery heat exchange tube (5) is in the shape of a coil, and a water inlet and a water outlet of the standby battery heat exchange tube (5) are both arranged on the side of the housing (15) close to the main battery (1).

8. The extended-range vehicle with a backup battery according to claim 1, characterized in that: The backup battery (4) is connected to the main battery (1) and the drive motor via the PDU and DCDC respectively.

9. The extended-range vehicle with a backup battery according to any one of claims 1 to 8, characterized in that: The backup battery (4) is a ternary lithium-ion battery.

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