Thermal management system for battery swap station and battery pack

Abstract

The utility model provides a thermal management system for a battery swap station and a battery pack. The thermal management system comprises a first temperature control pipeline, a second temperature control pipeline, a first change-over switch and a second change-over switch, a liquid outlet port of the first temperature control pipeline is communicated with a liquid inlet port of the battery pack through the first change-over switch, and a liquid inlet port of the first temperature control pipeline is communicated with a liquid outlet port of the battery pack through the second change-over switch; a liquid outlet port of the second temperature control pipeline is communicated with a liquid inlet port of the battery pack through the first change-over switch, and a liquid inlet port of the second temperature control pipeline is communicated with a liquid outlet port of the battery pack through the second change-over switch; through the two sets of different temperature control pipelines, when the battery pack generates different temperature requirements, the corresponding temperature control pipeline can be selected, and the efficiency and compatibility of the thermal management system can be effectively improved.

Description

Technical Field

[0001] The present disclosure relates to the technical field of electric vehicles, and in particular to a thermal management system for a battery swap station and a battery pack. Background Art

[0002] With the widespread popularization of new energy vehicle technology, in order to meet the demand for fast charging of new energy vehicles, battery swap stations are generally used as energy stations to replace power batteries.

[0003] The power batteries used in new energy vehicles need to be in a roughly stable temperature range, both during use and during charging, to maintain the battery's optimal performance.

[0004] Taking the water cooling system commonly used in battery swap stations as an example, it can provide a cooling or heating mode at the same time. However, the above mode is not applicable in some scenarios. Summary of the invention

[0005] In order to solve the problem that the thermal management system in the prior art is not applicable in some scenarios, the present invention provides a thermal management system for a battery swap station and a battery pack.

[0006] In a first aspect, the present disclosure provides a thermal management system for a battery pack, the thermal management system comprising: a first temperature control pipeline, a second temperature control pipeline, a first switching switch and a second switching switch;

[0007] The liquid outlet port of the first temperature control pipeline is connected to the liquid inlet port of the battery pack through the first switching switch, and the liquid inlet port of the first temperature control pipeline is connected to the liquid outlet port of the battery pack through the second switching switch;

[0008] The liquid outlet port of the second temperature control pipeline is connected to the liquid inlet port of the battery pack through the first switching switch, and the liquid inlet port of the second temperature control pipeline is connected to the liquid outlet port of the battery pack through the second switching switch.

[0009] As an optional embodiment, a first buffer water tank and a water cooling device are provided on the first temperature control pipeline;

[0010] The liquid outlet port of the first buffer water tank is respectively communicated with the first switching switch and the liquid inlet port of the water cooling device, and the liquid inlet port of the first buffer water tank is respectively communicated with the liquid outlet port of the second switching switch and the water cooling device.

[0011] As an optional embodiment, the water cooling device includes: a heat exchanger, a compressor and a condenser;

[0012] The liquid outlet port of the heat exchanger is communicated with the liquid inlet port of the first buffer water tank, the liquid inlet port of the heat exchanger is communicated with the liquid outlet port of the first buffer water tank, and the heat exchanger, the compressor and the condenser are communicated to form a refrigeration circuit.

[0013] As an optional embodiment, a first heater is further provided on the first temperature control pipeline;

[0014] The first heater is arranged at the liquid outlet port of the first buffer water tank.

[0015] As an optional embodiment, the second temperature control pipeline includes: a second buffer water tank and a second heater;

[0016] The liquid outlet port of the second buffer water tank is connected to the first switch, the liquid inlet port of the second buffer water tank is connected to the second switch, and the second heater is arranged at the liquid outlet port of the second buffer water tank.

[0017] As an optional embodiment, the first switching switch includes: a first three-way valve;

[0018] The first port of the first three-way valve is communicated with the liquid outlet port of the first temperature control pipeline, the second port of the first three-way valve is communicated with the liquid outlet port of the second temperature control pipeline, and the third port of the first three-way valve is communicated with the liquid inlet port of the battery pack;

[0019] And / or, the second switching switch includes: a second three-way valve;

[0020] The first port of the second three-way valve is connected to the liquid inlet port of the first temperature control pipeline, the second port of the second three-way valve is connected to the liquid inlet port of the second temperature control pipeline, and the third port of the second three-way valve is connected to the liquid outlet port of the battery pack.

[0021] As an optional embodiment, the thermal management system further includes: an electric ball valve;

[0022] The electric ball valve is connected between the first switch and the liquid inlet port of the battery pack;

[0023] and / or,

[0024] The thermal management system also includes: a manual ball valve;

[0025] The manual ball valve is connected between the second switching switch and the liquid outlet port of the battery pack.

[0026] As an optional embodiment, the thermal management system further includes: a drain pipeline;

[0027] The liquid discharge port of the liquid discharge pipeline is respectively connected to the liquid outlet port of the first temperature control pipeline, the liquid outlet port of the second temperature control pipeline and the liquid outlet port of the battery pack;

[0028] and / or,

[0029] There is at least one battery pack, and one battery pack is connected to the first temperature control pipeline and the second temperature control pipeline through a first switching switch and a second switching switch respectively.

[0030] As an optional embodiment, the thermal management system further includes: a temperature sensor and a controller;

[0031] The temperature sensor is arranged at the liquid outlet port of the battery pack, and the controller is electrically connected to the temperature sensor, the first switching switch and the second switching switch respectively.

[0032] In a second aspect, a battery swap station is provided, comprising: a thermal management system of a battery pack as described in any one of the first aspects.

[0033] The thermal management system of a battery swap station and a battery pack provided by the embodiments of the present disclosure has the following technical effects:

[0034] Through two different sets of temperature control circuits, when the battery packs have different temperature requirements, the corresponding temperature control circuits can be selected, which can effectively improve the efficiency and compatibility of the thermal management system; by controlling the selection of temperature control circuits through switching switches, it can ensure that the thermal management of different battery packs is isolated from each other and will not cause interference. As a result, when different battery packs have different temperature requirements, it is only necessary to control the switching switches of the corresponding battery packs to switch to meet multiple requirements at the same time, and compatibility is greatly improved.

[0035] It is to be understood that the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the present disclosure. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] In order to more clearly illustrate the technical solutions and advantages in the embodiments of the present application or the prior art, the drawings required for use in the embodiments or the prior art descriptions are briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0037] Figure 1 is a schematic structural diagram of a thermal management system for a battery pack provided by an exemplary embodiment of the present disclosure;

[0038] Figure 2 is a schematic diagram of the connection relationship of a thermal management system of a battery pack provided by an exemplary embodiment of the present disclosure;

[0039] Figure 3 is a schematic diagram of the connection relationship of the first temperature control pipeline 10 provided by an exemplary embodiment of the present disclosure;

[0040] Figure 4 is a schematic diagram of the connection relationship of the second temperature control pipeline 20 provided by an exemplary embodiment of the present disclosure;

[0041] Figure 5Schematic diagram of the connection relationship of a battery pack 50 provided by an exemplary embodiment of the present disclosure. DETAILED DESCRIPTION

[0042] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of this application.

[0043] It should be noted that the terms "first", "second", etc. in the specification and claims of the present application and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be interchangeable where appropriate, so that the embodiments of the present application described herein can be implemented in an order other than those illustrated or described herein. In addition, the terms "including:" and "having" and any of their variations are intended to cover non-exclusive inclusions, for example, a process, method, system, product or server that includes a series of steps or units is not necessarily limited to those steps or units clearly listed, but may include: other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0044] Temperature is usually the biggest factor affecting the health of power batteries. In order to maintain the performance of the battery, the ambient temperature is generally maintained above 25 degrees Celsius and below 45 degrees Celsius. Once it exceeds the optimal temperature range, the performance of the power battery will be greatly affected, resulting in a decrease in discharge capacity and thus a decrease in driving range. In addition, high temperature conditions will accelerate irreversible reactions inside the battery, causing a decrease in the active substances inside and accelerating battery aging; low temperature conditions will slow down the diffusion of lithium ions, affecting the battery's charge and discharge performance.

[0045] Therefore, both the automotive system and the battery swap station system will provide a thermal management system. During the operation of the power battery, the circulating medium is transported to the battery pack to exchange cold or heat, and heat is exchanged with the battery pack to maintain the temperature.

[0046] Taking the battery swap station as an example, the thermal management system only provides one mode in one scenario, such as heat exchange mode or cooling mode. However, in some scenarios, the existing modes are difficult to meet the needs. For example, in the transition season, the weather temperature may be in a critical state, and the power batteries have different temperature requirements under different working conditions. Some power batteries have cooling requirements, while some power batteries have heating requirements. In addition, even if all the power batteries in the battery swap station have the same cooling demand or heating demand, due to the different working conditions of the power batteries, the temperature inside the battery pack is also different, which makes different power batteries have different temperature requirements in the cooling mode or the heating mode.

[0047] Based on this, see Figure 1 An exemplary embodiment of the present disclosure provides a thermal management system for a battery pack, the thermal management system comprising: a first temperature control circuit 10 , a second temperature control circuit 20 , a first switch 30 , and a second switch 40 .

[0048] The liquid outlet port of the first temperature control pipeline 10 is connected to the liquid inlet port of the battery pack 50 through the first switch 30, and the liquid inlet port of the first temperature control pipeline 10 is connected to the liquid outlet port of the battery pack 50 through the second switch 40. The liquid outlet port of the second temperature control pipeline 20 is connected to the liquid inlet port of the battery pack 50 through the first switch 30, and the liquid inlet port of the second temperature control pipeline 20 is connected to the liquid outlet port of the battery pack 50 through the second switch 40.

[0049] The first temperature control line 10 is used to deliver a circulating medium of a first preset temperature to the battery pack 50, and the second temperature control line 20 is used to deliver a circulating medium of a second preset temperature to the battery pack 50. When the battery pack 50 generates a demand for the first preset temperature, the first switching switch 30 and the second switching switch 40 are controlled to switch to be connected to the first temperature control line 10 at the same time, so that the circulating medium in the first temperature control line 10 can flow into the battery pack 50; when the battery pack 50 generates a demand for the second preset temperature, the first switching switch 30 and the second switching switch 40 are controlled to switch to be connected to the second temperature control line 20 at the same time, so that the circulating medium in the second temperature control line 20 can flow into the battery pack 50.

[0050] The first preset temperature and the second preset temperature are not specifically limited in this embodiment, and can be selected according to the actual application scenario. The circulating medium used in this embodiment may include, but is not limited to, any one or more of the following: machine oil, nitrate salt, polyvinyl alcohol, formaldehyde solution, trinitrate solution, water-soluble quenching agent, etc.

[0051] In this embodiment, by using two different sets of temperature control circuits, when the battery packs have different temperature requirements, the corresponding temperature control circuits can be selected, which can effectively improve the efficiency and compatibility of the thermal management system; by controlling the selection of the temperature control circuits through the switching switch, it can ensure that the thermal management of different battery packs are isolated from each other and will not cause interference, so that when different battery packs have different temperature requirements, it is only necessary to control the switching switch of the corresponding battery pack to switch to meet multiple requirements at the same time, and the compatibility is greatly improved.

[0052] In one embodiment, Figure 2 and Figure 3 As shown, a first buffer water tank 11 and a water cooling device 12 are provided on the first temperature control pipeline 10. The liquid outlet port of the first buffer water tank 11 is respectively connected to the first switching switch 30 and the liquid inlet port of the water cooling device 12, and the liquid inlet port of the first buffer water tank 11 is respectively connected to the second switching switch 40 and the liquid outlet port of the water cooling device 12.

[0053] The first buffer water tank 11 is used to store the circulating medium, and the water cooling device 12 is used to refrigerate the circulating medium to obtain refrigerated medium.

[0054] In an optional embodiment, the water cooling device 12 specifically includes: a heat exchanger 121, a compressor 122 and a condenser 123. The liquid outlet port of the heat exchanger 121 is connected to the liquid inlet port of the first buffer water tank 11, the liquid inlet port of the heat exchanger 121 is connected to the liquid outlet port of the first buffer water tank 11, and the heat exchanger 121, the compressor 122 and the condenser 123 are connected to form a refrigeration circuit.

[0055] A refrigerant medium circulates in the refrigeration circuit, and the refrigerant medium and the circulating medium exchange heat in the heat exchanger 121 . The cooled circulating medium enters the battery pack 50 through the first temperature control pipeline 10 , taking away the heat of the battery pack 50 to cool the battery pack 50 .

[0056] The working process of the refrigeration circuit is as follows: the compressor 122 discharges the high-temperature and high-pressure refrigerant medium from the compressor 122, the refrigerant medium enters the condenser 123 for condensation and heat exchange, enters the heat exchanger 121 for evaporation and heat exchange with the circulating medium, the refrigerant medium absorbs heat and evaporates in the heat exchanger 121, and then flows back to the intake port of the compressor 122, completing a refrigeration cycle.

[0057] In this embodiment, the refrigerated circulating medium can be provided to cool the battery pack that needs cooling.

[0058] In an optional implementation, a first heater 13 is further provided on the first temperature control pipeline 10 , and the first heater 13 is disposed at a liquid outlet port of the first buffer water tank 11 .

[0059] In this embodiment, on the one hand, the first heater 13 can perform secondary adjustments on the circulating medium after being cooled by the water cooling device 12 to meet the temperature requirements of the battery pack 50 and avoid the impact caused by the excessively low temperature of the circulating medium. On the other hand, when used in winter, the water cooling device 12 can be stopped to cool the circulating medium, and the first heater 13 can be used to heat the circulating medium to meet the heat exchange requirements of the battery pack in winter and improve the compatibility and scope of use of the thermal management system.

[0060] In one embodiment, Figure 2 and Figure 4 As shown, the second temperature control pipeline 20 includes: a second buffer water tank 21 and a second heater 22. The liquid outlet port of the second buffer water tank 21 is connected to the first switch 30, the liquid inlet port of the second buffer water tank 21 is connected to the second switch 40, and the second heater 22 is arranged at the liquid outlet port of the second buffer water tank 21.

[0061] The second buffer water tank 21 is used to store the circulating medium, and the second heater 22 is used to heat the circulating medium to obtain heated circulating medium for heat exchange with the battery pack requiring temperature increase.

[0062] In one embodiment, Figure 2 and Figure 5 As shown, the first switching switch 30 specifically includes: a first three-way valve, and the second switching switch 40 includes: a second three-way valve.

[0063] Among them, the first port 31 of the first three-way valve is communicated with the liquid outlet port of the first temperature control pipeline 10, the second port 32 of the first three-way valve is communicated with the liquid outlet port of the second temperature control pipeline 20, and the third port 33 of the first three-way valve is communicated with the liquid inlet port of the battery pack 50. The first port of the second three-way valve 41 is communicated with the liquid inlet port of the first temperature control pipeline 10, the second port 42 of the second three-way valve is communicated with the liquid inlet port of the second temperature control pipeline 20, and the third port of the second three-way valve 43 is communicated with the liquid outlet port of the battery pack 50.

[0064] In this embodiment, when the first three-way valve and the second three-way valve are in the open state at the same time, the first circulation pipeline 10 is connected to supply the circulating medium of the first preset temperature to the battery pack 50; when the first three-way valve and the second three-way valve are in the closed state at the same time, the second circulation pipeline 20 is connected to supply the circulating medium of the second preset temperature to the battery pack 50.

[0065] In an optional implementation, the thermal management system further includes: an electric ball valve 61 and a manual ball valve 62 .

[0066] The electric ball valve 61 is connected between the first switch 30 and the liquid inlet port of the battery pack 50, and is used to control the flow rate and flow rate of the circulating medium flowing through the battery pack 50. The manual ball valve 62 is connected between the second switch 40 and the liquid outlet port of the battery pack 50. When the thermal management system needs to be repaired or the battery pack is unloaded, the manual ball valve 62 can be controlled to close.

[0067] In addition, from Figure 5 It can also be seen that the thermal management system of the battery pack provided in this embodiment can load at least one battery pack 50, and one battery pack is connected to the first temperature control pipeline and the second temperature control pipeline through a first switching switch and a second switching switch respectively. When the number of the first temperature control pipeline 10 and the second temperature control pipeline 20 remains unchanged, the loading of multiple battery packs 50 can be achieved by setting a plurality of first switching switches 10 and second switching switches 20, and the thermal management of each battery pack 50 can be achieved without interfering with each other, and the corresponding pipeline can be switched according to their respective temperature requirements.

[0068] In the battery pack thermal management system of this embodiment, when the number of first temperature control pipelines 10 and second temperature control pipelines 20 is inconvenient, a relatively independent thermal management circuit is provided for each battery pack to ensure that the thermal management of each battery pack will not affect each other.

[0069] In one embodiment, Figure 2 As shown, manual ball valves 62 are also installed between the liquid inlet ports and liquid outlet ports of the first temperature control pipeline 10 and the second temperature control pipeline 20 and the first switching switch 30 and the second switching switch 40. When the system fails and needs maintenance, the manual ball valves 62 at the corresponding positions can be controlled to close.

[0070] In one embodiment, Figure 2 As shown, the thermal management system also includes: a drain pipeline, a drain port 70 of the drain pipeline is respectively connected to the outlet port of the first temperature control pipeline 10, the outlet port of the second temperature control pipeline 20 and the outlet port of the battery pack 50 for discharging the circulating medium.

[0071] In one embodiment, the thermal management system further includes: a temperature sensor and a controller (not shown in the figure). The temperature sensor is disposed at the liquid outlet port of the battery pack 50, and the controller is electrically connected to the temperature sensor, the first switch 30 and the second switch 40 respectively.

[0072] The temperature sensor disposed at the liquid outlet port of the battery pack 50 can timely feedback the temperature inside the battery pack. When the collected temperature is too low, the first switch 30 and the second switch 40 can be controlled to switch the second temperature control pipeline 20; when the collected temperature is too high, the first switch 30 and the second switch 40 can be controlled to switch the first temperature control pipeline 10.

[0073] An exemplary embodiment of the present disclosure further provides a battery swap station, which includes the thermal management system of the battery pack in the above embodiment. For details, please refer to the contents recorded in the above embodiment, which will not be repeated here.

[0074] It should be noted that the above-mentioned sequence of the embodiments of the present application is for description only and does not represent the advantages and disadvantages of the embodiments. The above-mentioned specific embodiments of this specification are described. Other embodiments are within the scope of the attached claims. In some cases, the actions or steps recorded in the claims can be performed in an order different from that in the embodiments and still achieve the desired results. In addition, the processes depicted in the drawings do not necessarily require the specific order or continuous order shown to achieve the desired results. In some embodiments, multitasking and parallel processing are also possible or may be advantageous.

[0075] The various embodiments in this specification are described in a progressive manner, and the same or similar parts between the various embodiments can be referenced to each other, and each embodiment focuses on the differences from other embodiments.

[0076] The above description is only a preferred embodiment of the present application and is not intended to limit the present application. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present application should be included in the protection scope of the present application.

Claims

1. A thermal management system for a battery pack, characterized in that: The thermal management system comprises: a first temperature control pipeline (10), a second temperature control pipeline (20), a first switching switch (30) and a second switching switch (40); The liquid outlet port of the first temperature control pipeline (10) is connected to the liquid inlet port of the battery pack (50) via the first switching switch (30), and the liquid inlet port of the first temperature control pipeline (10) is connected to the liquid outlet port of the battery pack (50) via the second switching switch (40); The liquid outlet port of the second temperature control pipeline (20) is connected to the liquid inlet port of the battery pack (50) via the first switching switch (30), and the liquid inlet port of the second temperature control pipeline (20) is connected to the liquid outlet port of the battery pack (50) via the second switching switch (40).

2. The thermal management system of the battery pack according to claim 1, characterized in that: The first temperature control pipeline (10) is provided with a first buffer water tank (11) and a water cooling device (12); The liquid outlet port of the first buffer water tank (11) is respectively connected to the first switching switch (30) and the liquid inlet port of the water cooling device (12), and the liquid inlet port of the first buffer water tank (11) is respectively connected to the liquid outlet port of the second switching switch (40) and the water cooling device (12).

3. The thermal management system of the battery pack according to claim 2, characterized in that: The water cooling device (12) comprises: a heat exchanger (121), a compressor (122) and a condenser (123); The liquid outlet port of the heat exchanger (121) is connected to the liquid inlet port of the first buffer water tank (11), and the liquid inlet port of the heat exchanger (121) is connected to the liquid outlet port of the first buffer water tank (11). The heat exchanger (121), the compressor (122) and the condenser (123) are connected to form a refrigeration circuit.

4. The thermal management system of the battery pack according to claim 2, characterized in that: The first temperature control pipeline (10) is also provided with a first heater (13); The first heater (13) is arranged at the liquid outlet port of the first buffer water tank (11).

5. The thermal management system of the battery pack according to claim 1, characterized in that: The second temperature control pipeline (20) comprises: a second buffer water tank (21) and a second heater (22); The liquid outlet port of the second buffer water tank (21) is connected to the first switch (30), the liquid inlet port of the second buffer water tank (21) is connected to the second switch (40), and the second heater (22) is arranged at the liquid outlet port of the second buffer water tank (21).

6. The thermal management system of the battery pack according to claim 1, characterized in that: The first switching switch (30) comprises: a first three-way valve; The first port (31) of the first three-way valve is in communication with the liquid outlet port of the first temperature control pipeline (10), the second port (32) of the first three-way valve is in communication with the liquid outlet port of the second temperature control pipeline (20), and the third port (33) of the first three-way valve is in communication with the liquid inlet port of the battery pack (50); And / or, the second switching switch (40) comprises: a second three-way valve; The first port (41) of the second three-way valve is connected to the liquid inlet port of the first temperature control pipeline (10), the second port (42) of the second three-way valve is connected to the liquid inlet port of the second temperature control pipeline (20), and the third port (43) of the second three-way valve is connected to the liquid outlet port of the battery pack (50).

7. The thermal management system of the battery pack according to claim 1, characterized in that: The thermal management system further comprises: an electric ball valve (61); The electric ball valve (61) is connected between the first switch (30) and the liquid inlet port of the battery pack (50); and / or, The thermal management system further comprises: a manual ball valve (62); The manual ball valve (62) is connected between the second switch (40) and the liquid outlet port of the battery pack (50).

8. The thermal management system of the battery pack according to claim 1, characterized in that: The thermal management system further comprises: a liquid discharge pipeline (70); The liquid discharge port of the liquid discharge pipeline (70) is respectively connected to the liquid outlet port of the first temperature control pipeline (10), the liquid outlet port of the second temperature control pipeline (20) and the liquid outlet port of the battery pack (50); and / or, The number of the battery pack (50) is at least one, and one battery pack (50) is connected to the first temperature control pipeline (10) and the second temperature control pipeline (20) via one first switching switch (30) and one second switching switch (40), respectively.

9. The thermal management system of the battery pack according to claim 1, characterized in that: The thermal management system further comprises: a temperature sensor and a controller; The temperature sensor is arranged at the liquid outlet port of the battery pack (50), and the controller is electrically connected to the temperature sensor, the first switch (30) and the second switch (40) respectively.

10. A battery swap station, characterized in that: The battery swap station comprises: a thermal management system for the battery pack according to any one of claims 1-9.

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