Intelligent heat dissipation system for battery pack

Abstract

The utility model provides a battery pack intelligent heat dissipation system, and belongs to the field of battery pack heat dissipation. The intelligent heat dissipation system for the battery pack comprises a first circulating pipeline, a second circulating pipeline, a first temperature detection module, a second temperature detection module, a heat exchanger, a control module, a comparison module and a first valve, the first valve is respectively connected with the first circulating pipeline and the second circulating pipeline; the heat exchanger is arranged in the second circulating pipeline; the comparison module is connected with the first temperature detection module and the second temperature detection module. The control module is connected with the comparison module and the first valve. The first temperature detection module is used for being connected with a battery pack; the first temperature detection module is configured to detect the temperature of the battery pack; the second temperature detection module is configured to detect the temperature of the cooling liquid at the first valve. The problems of low liquid cooling heat dissipation efficiency and resource waste can be solved.

Description

Technical Field

[0001] The present disclosure relates to the field of battery pack heat dissipation, and in particular to an intelligent heat dissipation system for a battery pack. Background Art

[0002] During battery pack operation, excessively high temperatures can adversely affect the capacity of the internal cells. High temperatures accelerate side reactions within the battery, leading to loss of active materials and capacity decay. Batteries used at high temperatures for extended periods may experience a significant decrease in capacity.

[0003] Nowadays, heat exchangers are usually used to cool the coolant to dissipate heat from the battery pack. When passing through the heat exchanger, the speed of the coolant is reduced, resulting in a low heat dissipation rate.

[0004] It can be seen that there is an urgent need for an efficient and reliable battery pack heat dissipation system. Utility Model Content

[0005] The embodiments of the present disclosure provide an intelligent heat dissipation system for a battery pack to solve the problems of low heat dissipation efficiency and waste of resources in liquid cooling.

[0006] The embodiment of the present disclosure provides a battery pack intelligent heat dissipation system, comprising: a first circulation pipe, a second circulation pipe, a first temperature detection module, a second temperature detection module, a heat exchanger, a control module, a comparison module, and a first valve;

[0007] The first valve is connected to the first circulation pipeline and the second circulation pipeline respectively;

[0008] The heat exchanger is arranged in the second circulation pipe;

[0009] The comparison module is connected to the first temperature detection module and the second temperature detection module respectively;

[0010] The control module is connected to the comparison module and the first valve respectively;

[0011] The first temperature detection module is used to connect to the battery pack;

[0012] The first temperature detection module is configured to detect the temperature of the battery pack;

[0013] The second temperature detection module is configured to detect the temperature of the coolant at the first valve.

[0014] In an exemplary embodiment of the present disclosure, the first temperature detection module includes: a first thermistor and a first voltage-dividing resistor;

[0015] The first end of the first thermistor is used to be connected to an external power supply, and the second end is respectively connected to the first end of the first voltage divider resistor and the non-inverting input end of the comparison module;

[0016] The second end of the first voltage-dividing resistor is grounded.

[0017] In an exemplary embodiment of the present disclosure, the second temperature detection module includes: a second thermistor and a second voltage-dividing resistor;

[0018] The first end of the second thermistor is used to be connected to an external power supply, and the second end is respectively connected to the first end of the second voltage divider resistor and the non-inverting input end of the comparison module;

[0019] The second end of the second voltage-dividing resistor is grounded.

[0020] In an exemplary embodiment of the present disclosure, a battery pack intelligent heat dissipation system further includes: a third circulation pipe, a second valve, and a third valve;

[0021] The second valve is connected to the second circulation pipeline and the third circulation pipeline respectively;

[0022] The third valve is connected to the second circulation pipeline and the third circulation pipeline respectively.

[0023] In an exemplary embodiment of the present disclosure, a battery pack intelligent heat dissipation system further includes: a third temperature detection module;

[0024] The third temperature detection module is connected to the comparison module;

[0025] The third temperature detection module is used to detect the temperature of the coolant at the second valve.

[0026] In an exemplary embodiment of the present disclosure, the third temperature detection module includes:

[0027] a third thermistor and a third voltage-dividing resistor;

[0028] The first end of the third thermistor is used to be connected to an external power supply, and the second end is connected to the first end of the third voltage divider resistor and the non-inverting input end of the comparison module respectively;

[0029] The second end of the third voltage-dividing resistor is grounded.

[0030] In an exemplary embodiment of the present disclosure, the comparison module includes: a first comparator, a second comparator, a third comparator, a first OR gate unit, and a second OR gate unit;

[0031] The second terminal of the first thermistor is connected to the non-inverting input terminal of the first comparator;

[0032] The second terminal of the second thermistor is connected to the non-inverting input terminal of the second comparator;

[0033] The second end of the third thermistor is connected to the non-inverting input end of the third comparator;

[0034] The output terminal of the first comparator and the input terminal of the second comparator are both connected to the input terminal of the first OR gate unit;

[0035] The input end of the second comparator and the input end of the third comparator are both connected to the input end of the second OR gate unit;

[0036] The output ends of the first OR gate unit and the second OR gate unit are both connected to the control module.

[0037] In an exemplary embodiment of the present disclosure, it further includes: a phase change heat dissipation module;

[0038] The phase change heat dissipation module is arranged outside the third circulation pipe;

[0039] The phase change heat dissipation module is configured to reduce the temperature of the cooling liquid.

[0040] The beneficial effects of the intelligent heat dissipation system for a battery pack provided by the embodiments of the present disclosure are:

[0041] The present disclosure determines whether to open the heat exchanger by detecting the temperature of the coolant at the first valve. Compared with passing through the heat exchanger, the flow rate of the coolant is faster when not passing through the heat exchanger, thereby improving the cooling efficiency and reducing energy consumption. The present disclosure detects the temperature of the battery pack and can promptly detect abnormal temperature increases of the battery pack and activate the heat dissipation mechanism, thereby effectively preventing the occurrence of safety accidents caused by overheating of the battery pack and improving the safety of the system. The present disclosure can automatically adapt to the heat dissipation requirements of the battery pack under different working conditions, maintain a stable heat dissipation effect, and enhance the stability and reliability of the system. BRIEF DESCRIPTION OF THE DRAWINGS

[0042] In order to more clearly illustrate the technical solutions in the embodiments of the present disclosure, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present disclosure. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative labor.

[0043] Figure 1 This is a schematic structural diagram of an intelligent heat dissipation system for a battery pack provided by an embodiment of the present disclosure;

[0044] Figure 2 is a structural diagram of a second battery pack intelligent heat dissipation system provided by an embodiment of the present disclosure;

[0045] Figure 3 This is a structural diagram of the third battery pack intelligent heat dissipation system provided in an embodiment of the present disclosure. DETAILED DESCRIPTION

[0046] To help those skilled in the art better understand this solution, the following will clearly describe the technical solutions in the embodiments of this solution in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of this solution, not all of it. Based on the embodiments of this solution, all other embodiments obtained by those skilled in the art without creative work should fall within the scope of protection of this solution.

[0047] Throughout the specification, claims, and accompanying figures of this solution, the term "including" and any variations thereof mean "including, but not limited to," and are intended to cover non-exclusive inclusions and are not limited to the examples listed herein. Furthermore, the terms "first" and "second," etc., are used to distinguish between different objects, not to describe a specific order.

[0048] The following describes the implementation of the present disclosure in detail with reference to the accompanying drawings:

[0049] Figure 1 This is a schematic diagram of the structure of a battery pack intelligent heat dissipation system provided by an embodiment of the present disclosure. Figure 1 , the battery pack intelligent heat dissipation system includes:

[0050] A first circulation pipe 10, a second circulation pipe 11, a first temperature detection module 12, a second temperature detection module 13, a heat exchanger 14, a control module 15, a comparison module 16 and a first valve 17;

[0051] The first valve 17 is connected to the first circulation pipe 10 and the second circulation pipe 11 respectively;

[0052] The heat exchanger 14 is disposed in the second circulation pipe 11;

[0053] The comparison module 16 is connected to the first temperature detection module 12 and the second temperature detection module 13 respectively;

[0054] The control module 15 is connected to the comparison module 16 and the first valve 17 respectively;

[0055] The first temperature detection module 12 is used to connect with the battery pack;

[0056] The first temperature detection module 12 is configured to detect the temperature of the battery pack;

[0057] The second temperature detection module 13 is configured to detect the temperature of the coolant at the first valve 17 .

[0058] In this embodiment, the first circulation pipe 10 is an outer pipe that does not pass through the heat exchanger 14, and the second circulation pipe 11 is an inner pipe that passes through the heat exchanger 14. The comparison module 16 is configured to compare the temperature sent by the first temperature detection module 12 with a preset first threshold value, and send "0" or "1" to the control module 15 based on the comparison result; the comparison module 16 is also configured to compare the temperature sent by the second temperature detection module 13 with a preset second threshold value, and send "0" or "1" to the control module 15 based on the comparison result; the control module 15 is configured to receive the signal sent by the comparison module 16 and control the first valve 17 to open or close.

[0059] For example, the first threshold is 60°C, the second threshold is 40°C, the first temperature detection module 12 detects that the battery pack temperature is 50°C and sends it to the comparison module 16, the second temperature detection module 13 detects that the coolant temperature at the first valve 17 is 41°C, and sends it to the comparison module 16, the comparison module 16 compares them respectively, since 60°C is greater than 50°C, the comparison module 16 sends "1" to the control module 15, since 40°C is less than 41°C, the comparison module 16 sends "0" to the control module 15, at this time the control module 15 receives "1", determines that the current battery pack temperature is high, controls the first valve 17 to open, and allows the coolant to flow through the heat exchanger 14 for cooling.

[0060] From the above, it can be concluded that the present disclosure determines whether to open the heat exchanger by detecting the temperature of the coolant at the first valve 17. Compared with passing through the heat exchanger, the flow rate of the coolant is faster when not passing through the heat exchanger, thereby improving the cooling efficiency and reducing energy consumption. The present disclosure can detect the abnormal increase in the temperature of the battery pack in time by detecting the temperature of the battery pack, and start the heat dissipation mechanism, thereby effectively preventing the occurrence of safety accidents caused by overheating of the battery pack and improving the safety of the system. The present disclosure can automatically adapt to the heat dissipation requirements of the battery pack under different working conditions, maintain a stable heat dissipation effect, and enhance the stability and reliability of the system.

[0061] In one embodiment of the present disclosure, reference Figure 2 and Figure 3 The first temperature detection module 12 includes a first thermistor 121 and a first voltage divider resistor 122;

[0062] The first end of the first thermistor 121 is used to be connected to an external power supply, and the second end is connected to the first end of the first voltage divider resistor 122 and the non-inverting input end of the comparison module 16 respectively;

[0063] A second end of the first voltage-dividing resistor 122 is grounded.

[0064] In one embodiment of the present disclosure, reference Figure 2 and Figure 3 The second temperature detection module 13 includes: a second thermistor 131 and a second voltage divider resistor 132;

[0065] The first end of the second thermistor 131 is used to be connected to an external power supply, and the second end is connected to the first end of the second voltage divider resistor 132 and the non-inverting input end of the comparison module 16 respectively;

[0066] A second end of the second voltage-dividing resistor 132 is grounded.

[0067] In one embodiment of the present disclosure, reference Figure 2 and Figure 3 , a battery pack intelligent heat dissipation system, further comprising: a third circulation pipe 18, a second valve 19 and a third valve 20;

[0068] The second valve 19 is connected to the second circulation pipe 11 and the third circulation pipe 18 respectively;

[0069] The third valve 20 is connected to the second circulation pipe 11 and the third circulation pipe 18 respectively.

[0070] In one embodiment of the present disclosure, reference Figure 2 and Figure 3 , a battery pack intelligent heat dissipation system further includes: a third temperature detection module 21;

[0071] The third temperature detection module 21 is connected to the comparison module 16;

[0072] The third temperature detection module 21 is used to detect the temperature of the coolant at the second valve 19 .

[0073] In one embodiment of the present disclosure, reference Figure 2 and Figure 3 The third temperature detection module 21 includes:

[0074] a third thermistor 211 and a third voltage-dividing resistor 212;

[0075] The first end of the third thermistor 211 is used to be connected to the external power supply, and the second end is connected to the first end of the third voltage divider resistor 212 and the non-inverting input end of the comparison module 16 respectively;

[0076] A second end of the third voltage-dividing resistor 212 is grounded.

[0077] In one embodiment of the present disclosure, reference Figure 2 and Figure 3, the comparison module 16 includes: a first comparator 161, a second comparator 162, a third comparator 163, a first OR gate unit 164 and a second OR gate unit 165;

[0078] The second terminal of the first thermistor 121 is connected to the non-inverting input terminal of the first comparator 161;

[0079] The second terminal of the second thermistor 131 is connected to the non-inverting input terminal of the second comparator 162;

[0080] The second terminal of the third thermistor 211 is connected to the non-inverting input terminal of the third comparator 163;

[0081] The output terminal of the first comparator 161 and the input terminal of the second comparator 162 are both connected to the input terminal of the first OR gate unit 164;

[0082] An input terminal of the second comparator 162 and an input terminal of the third comparator 163 are both connected to an input terminal of the second OR gate unit 165 .

[0083] In one embodiment of the present disclosure, reference Figure 2 and Figure 3 , a battery pack intelligent heat dissipation system, further comprising: a phase change heat dissipation module 22;

[0084] The phase change heat dissipation module 22 is arranged outside the third circulation pipe 18;

[0085] The phase change heat dissipation module 22 is configured to reduce the temperature of the coolant.

[0086] Specifically, the first thermistor 121 detects the temperature of the battery pack and sends it to the first comparator 161. The first comparator 161 compares the battery pack temperature with the first threshold. If the battery pack temperature is greater than the first threshold, "1" is sent to the first OR gate unit 164 and the second OR gate unit 165, otherwise "0" is sent.

[0087] The second thermistor 131 detects the temperature of the coolant at the first valve 17 and sends it to the second comparator 162. The second comparator 162 compares the temperature of the coolant at the first valve 17 with a second threshold. If the temperature of the coolant at the first valve 17 is greater than the second threshold, "1" is sent to the first OR gate unit 164, otherwise "0" is sent.

[0088] The third thermistor 211 detects the temperature of the coolant at the second valve 19 and sends it to the third comparator 163. The third comparator 163 compares the temperature of the coolant at the first valve 17 with a third threshold. If the temperature of the coolant at the first valve 17 is greater than the third threshold, a "1" is sent to the second OR gate unit 165, otherwise a "0" is sent.

[0089] The first OR gate unit 164 is configured to send “0” to the control module 15 when “00” is received; send “1” to the control module 15 when “01” is received; send “1” to the control module 15 when “10” is received; and send “1” to the control module 15 when “11” is received.

[0090] The second OR gate unit 165 is configured to send "0" to the control module 15 when receiving "00"; send "1" to the control module 15 when receiving "01"; send "1" to the control module 15 when receiving "10"; and send "1" to the control module 15 when receiving "11".

[0091] The control module 15 is configured to control the first valve 17 to open when receiving a "1" sent by the first OR gate unit 164, and to control the first valve 17 to close when receiving a "0" sent by the first OR gate unit 164, and to control the second valve 19 and the third valve 20 to open when receiving a "1" sent by the second OR gate unit 165, and to control the second valve 19 and the third valve 20 to close when receiving a "0" sent by the second OR gate unit 165. During this process, regardless of the open or closed state of the first valve 17, the second valve 19 and the third valve 20, the coolant flows through the phase change heat dissipation module 22, and the phase change heat dissipation module 22 is configured to reduce the temperature of the coolant.

[0092] For example, the first threshold is 60°C, the second threshold is 50°C, and the third threshold is 40°C; the first thermistor 121 detects that the battery pack temperature is 45°C; the second thermistor 131 detects that the coolant temperature at the first valve 17 is 25°C; the third thermistor 211 detects that the coolant temperature at the second valve 19 is 28°C. Since 45°C is less than 60°C, the first comparator 161 sends "0" to the first OR gate unit 164 and the second OR gate unit 165; since 25°C is less than 50°C, the second comparator 162 sends "0" to the first OR gate unit 164; since 28°C is less than 40°C, the third comparator 163 sends "0" to the second OR gate unit 165.

[0093] At this time, since the signal received by the first OR gate unit 164 is "00", "0" is sent to the control module 15. Since the signal received by the second OR gate unit 165 is "00", "0" is sent to the control module 15. The control module 15 controls the first valve 17 to close, the second valve 19 to close, and the third valve 20 to close. At this time, the coolant flows in the third circulation pipe 18.

[0094] After a period of time, the first thermistor 121 detects that the battery pack temperature is 55°C, and the third thermistor 211 detects that the coolant temperature at the second valve 19 is 45°C. Since 45°C is greater than 40°C, the third comparator 163 sends "1" to the second OR gate unit 165. At this time, the second OR gate unit 165 receives "01" and sends "1" to the control module 15. The control module 15 controls the second valve 19 and the third valve 20 to open, and the coolant flows in the first circulation pipe 10, increasing the flow distance to reduce the coolant temperature.

[0095] After another period of time, the first thermistor 121 detects that the battery pack temperature is 65°C; the second thermistor 131 detects that the coolant temperature at the first valve 17 is 55°C; the third thermistor 211 detects that the coolant temperature at the second valve 19 is 45°C; at this time, since 65°C is greater than 60°C, the first comparator 161 sends "1" to the first OR gate unit 164 and the second OR gate unit 165; since 55°C is greater than 50°C, the second comparator 162 sends "1" to the first OR gate unit 164; since 45°C is greater than 40°C, the third comparator 163 sends "1" to the second OR gate unit 165; at this time, since the signal received by the first OR gate unit 164 is "11", it sends "1" to the control module 15; since the signal received by the second OR gate unit 165 is "11", it sends "1" to the control module 15.

[0096] The control module 15 controls the first valve 17 to open, the second valve 19 to open, and the third valve 20 to open. At this time, the coolant flows in the second circulation pipe 11, allowing the coolant to flow through the heat exchanger 14 to further reduce the temperature. During this process, regardless of the opening and closing states of the first valve 17, the second valve 19, and the third valve 20, the coolant flows through the phase change heat dissipation module 22.

[0097] From the above, it can be concluded that the present disclosure, through the first temperature detection module 12, the second temperature detection module 13, and the third temperature detection module 21, enables the present disclosure to monitor the coolant temperature of the battery pack and key valves in real time. The above-mentioned multi-point detection mechanism ensures the comprehensiveness and accuracy of temperature data, providing a reliable foundation for intelligent heat dissipation control; the present disclosure is equipped with multiple circulation pipes, valves, and phase change heat dissipation modules 22, which can flexibly adjust the heat dissipation strategy according to real-time temperature data, thereby improving heat dissipation efficiency and reducing resource waste. Through real-time detection and intelligent control, the present disclosure can effectively prevent the occurrence of safety accidents caused by overheating of the battery pack.

[0098] The above embodiments are only used to illustrate the technical solutions of the present disclosure, rather than to limit them. Although the present disclosure has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the various embodiments of the present disclosure.

Claims

1. A battery pack intelligent heat dissipation system, characterized in that: include: a first circulation pipeline, a second circulation pipeline, a first temperature detection module, a second temperature detection module, a heat exchanger, a control module, a comparison module, and a first valve; The first valve is connected to the first circulation pipeline and the second circulation pipeline respectively; The heat exchanger is arranged in the second circulation pipe; The comparison module is connected to the first temperature detection module and the second temperature detection module respectively; The control module is connected to the comparison module and the first valve respectively; The first temperature detection module is used to connect to the battery pack; The first temperature detection module is configured to detect the temperature of the battery pack; The second temperature detection module is configured to detect the temperature of the coolant at the first valve.

2. The intelligent heat dissipation system for a battery pack according to claim 1, characterized in that: The first temperature detection module includes: a first thermistor and a first voltage-dividing resistor; The first end of the first thermistor is used to be connected to an external power supply, and the second end is respectively connected to the first end of the first voltage divider resistor and the non-inverting input end of the comparison module; The second end of the first voltage-dividing resistor is grounded.

3. The intelligent heat dissipation system for a battery pack according to claim 2, characterized in that: The second temperature detection module includes: a second thermistor and a second voltage-dividing resistor; The first end of the second thermistor is used to be connected to an external power supply, and the second end is respectively connected to the first end of the second voltage divider resistor and the non-inverting input end of the comparison module; The second end of the second voltage-dividing resistor is grounded.

4. The intelligent heat dissipation system for a battery pack according to claim 3, characterized in that: Also includes: a third circulation pipeline, a second valve, and a third valve; The second valve is connected to the second circulation pipeline and the third circulation pipeline respectively; The third valve is connected to the second circulation pipeline and the third circulation pipeline respectively.

5. The intelligent heat dissipation system for a battery pack according to claim 4, characterized in that: Also includes: a third temperature detection module; The third temperature detection module is connected to the comparison module; The third temperature detection module is used to detect the temperature of the coolant at the second valve.

6. The intelligent heat dissipation system for a battery pack according to claim 5, characterized in that: The third temperature detection module includes: a third thermistor and a third voltage-dividing resistor; The first end of the third thermistor is used to be connected to an external power supply, and the second end is connected to the first end of the third voltage divider resistor and the non-inverting input end of the comparison module respectively; The second end of the third voltage-dividing resistor is grounded.

7. The intelligent heat dissipation system for a battery pack according to claim 6, characterized in that: The comparison module includes: a first comparator, a second comparator, a third comparator, a first OR gate unit and a second OR gate unit; The second terminal of the first thermistor is connected to the non-inverting input terminal of the first comparator; The second terminal of the second thermistor is connected to the non-inverting input terminal of the second comparator; The second end of the third thermistor is connected to the non-inverting input end of the third comparator; The output terminal of the first comparator and the input terminal of the second comparator are both connected to the input terminal of the first OR gate unit; The input end of the second comparator and the input end of the third comparator are both connected to the input end of the second OR gate unit; The output ends of the first OR gate unit and the second OR gate unit are both connected to the control module.

8. The intelligent heat dissipation system for a battery pack according to claim 4, characterized in that: Also includes: Phase change heat dissipation module; The phase change heat dissipation module is arranged outside the third circulation pipe; The phase change heat dissipation module is configured to reduce the temperature of the cooling liquid.

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