Battery pack temperature equalizing device and energy storage system

Abstract

The utility model discloses a battery pack temperature equalizing device and an energy storage system. The battery pack temperature equalizing device comprises at least two liquid cooling plates, a control valve assembly, a control module and a driving assembly. The liquid cooling plate and the battery cell module are correspondingly arranged; the liquid cooling plate exchanges heat with the battery cell module; the driving assembly is connected with the control valve assembly and the control module. The driving assembly is used for driving the heat-conducting medium to circulate; the control valve assembly comprises at least two groups of interfaces and a plurality of valves; the liquid cooling plate is connected with an interface of the control valve assembly; the control valve assembly controls a circulation path of the heat-conducting medium through opening or closing of each valve so as to balance the temperature of the battery pack; all the valves and the battery cell modules are connected with the control module; and the control module is used for acquiring the module temperature of each battery cell module, controlling the opening or closing of each valve according to each module temperature, and controlling the circulation direction of the heat-conducting medium. According to the battery pack temperature equalizing device disclosed by the embodiment of the utility model, the temperature difference between the battery cell modules can be reduced, and the service life of the battery pack is prolonged.

Description

Technical Field

[0001] This utility model relates to the field of energy storage technology, and in particular to a battery pack temperature equalization device and energy storage system. Background Technology

[0002] Currently, liquid cooling or liquid heating of battery packs generally uses profile cold plates, stamped cold plates, harmonica tube cold plates, etc. However, no matter which solution is used, it is impossible to control the cooling or heating power of each cell module in the battery pack during use. The temperature uniformity of each cell module inside the battery pack is poor, and the temperature difference between each cell module is high, which leads to a shorter service life of the battery pack. Utility Model Content

[0003] This invention provides a battery pack temperature equalization device and energy storage system to reduce the temperature difference between individual cell modules and improve the service life of the battery pack.

[0004] According to one aspect of the present invention, a battery pack temperature equalization device is provided. The battery pack includes at least two cell modules. The battery pack temperature equalization device includes at least two liquid cooling plates, a control valve assembly, a control module, and a drive assembly.

[0005] The liquid cooling plate is provided in a one-to-one correspondence with the battery cell module; the liquid cooling plate is used to exchange heat between the battery cell module; the drive assembly is connected to the control valve assembly and the control module respectively; the drive assembly is used to drive the heat transfer medium to circulate in the liquid cooling plate and the control valve assembly;

[0006] The control valve assembly includes at least two sets of interfaces and multiple valves; the liquid cooling plate is connected to the control valve assembly through the interfaces; the control valve assembly controls the circulation path of the heat-conducting medium by opening or closing each of the valves to balance the temperature of the battery pack.

[0007] Each valve in the control valve assembly and each battery cell module are connected to the control module; the control module is used to acquire the module temperature of each battery cell module, control the opening or closing of each valve according to the module temperature, and control the circulation direction of the heat-conducting medium.

[0008] Optionally, the number of liquid cooling plates is the same as the number of interfaces of the control valve assembly.

[0009] Optionally, the control valve assembly has three sets of interfaces; one set of interfaces of the control valve assembly includes two connection ports; the control valve assembly includes: a first valve, a second valve, a third valve, a fourth valve, a fifth valve, a sixth valve, a seventh valve, an eighth valve, a ninth valve, a tenth valve, an eleventh valve, a twelfth valve, a thirteenth valve, a fourteenth valve, a fifteenth valve, and a sixteenth valve;

[0010] The first end of the first valve is connected to the drive assembly; the second end of the first valve is connected to the first liquid cooling plate as the first connection port of the first group of interfaces; the first end of the second valve is connected to the first liquid cooling plate as the second connection port of the first group of interfaces; the first end of the third valve is connected to the drive assembly; the second end of the third valve is connected to the first end of the fourth valve; the second end of the fourth valve is connected to the second liquid cooling plate as the first connection port of the second group of interfaces; the first end of the fifth valve is connected to the second liquid cooling plate as the second connection port of the second group of interfaces; the second end of the fifth valve is connected to the first end of the sixth valve; the second end of the sixth valve is connected to the drive assembly; the first end of the seventh valve is connected to the drive assembly; the second end of the seventh valve is connected to the third liquid cooling plate as the first connection port of the third group of interfaces; the first end of the eighth valve is connected to the drive assembly; the second end of the seventh valve is connected to the third liquid cooling plate as the first connection port of the third group of interfaces; the first end of the eighth valve is connected to the drive assembly; the second end of the seventh valve is connected to the third liquid cooling plate as the first connection port of the third group of interfaces; the second ... third liquid cooling plate as the first connection port of the third group of interfaces; the second end of the fifth valve is connected to the drive assembly; the second end of the seventh valve is connected to the drive assembly; the second end of the seventh valve is connected to the third liquid cooling plate as the first connection port of the third group of interfaces; the second end of the eighth valve is connected to the third liquid cooling plate as the third liquid cooling plate as the third liquid cooling plate as the third liquid cooling plate as the third liquid cooling The second connection port of the third group of interfaces is connected to the third liquid cooling plate; the second end of the eighth valve is connected to the drive assembly; the ninth valve is connected between the second end of the first valve and the second end of the fourth valve; the tenth valve is connected between the second end of the fourth valve and the second end of the seventh valve; the eleventh valve is connected between the first end of the second valve and the first end of the fifth valve; the twelfth valve is connected between the first end of the fifth valve and the first end of the eighth valve; the thirteenth valve is connected between the first end of the first valve and the second end of the fifth valve; the fourteenth valve is connected between the first end of the second valve and the second end of the seventh valve; the fifteenth valve is connected between the first end of the fourth valve and the second end of the sixth valve; the sixteenth valve is connected between the second section of the seventh valve and the second end of the eighth valve.

[0011] The control terminals of the first valve, the second valve, the third valve, the fourth valve, the fifth valve, the sixth valve, the seventh valve, the eighth valve, the ninth valve, the tenth valve, the eleventh valve, the twelfth valve, the thirteenth valve, the fourteenth valve, the fifteenth valve, and the sixteenth valve are all connected to the control module.

[0012] Optionally, the valve includes either a solenoid valve or a pneumatic valve.

[0013] Optionally, the drive component includes: a drive unit and a commutation unit;

[0014] The first end of the reversing unit is connected to the first end of the control valve assembly; the second end of the reversing unit is connected to the second end of the control valve assembly; the third end of the reversing unit is connected to the first end of the drive unit; and the fourth end of the reversing unit is connected to the second end of the drive unit.

[0015] The driving unit is used to drive the heat-conducting medium to circulate; the reversing unit is used to change the circulation direction of the heat-conducting medium.

[0016] Optionally, the reversing unit includes: a first reversing valve, a second reversing valve, a third reversing valve, and a fourth reversing valve;

[0017] The first end of the first directional valve is connected to the control valve assembly; the second end of the first directional valve is connected to the first end of the drive unit; the first end of the second directional valve is connected to the control valve assembly; the second end of the second directional valve is connected to the first end of the drive unit; the first end of the third directional valve is connected to the second end of the drive unit; the second end of the third directional valve is connected to the first end of the second directional valve; the first end of the fourth directional valve is connected to the second end of the drive unit; the second end of the fourth directional valve is connected to the first end of the first directional valve; the control ends of the first directional valve, the second directional valve, the third directional valve, and the fourth directional valve are all connected to the control module.

[0018] Optionally, the drive unit includes a circulating pump.

[0019] Optionally, it also includes: a heat exchange module;

[0020] The first end of the control valve assembly is connected to the first end of the drive assembly; the first end of the heat exchange module is connected to the second end of the control valve assembly; the second end of the heat exchange module is connected to the second end of the drive assembly; the control end of the heat exchange module is connected to the control module.

[0021] The heat exchange module is used to heat or dissipate heat from the heat-conducting medium.

[0022] Optionally, the heat exchange module includes: a heating component and a heat dissipation component;

[0023] The heating component is connected between the control valve assembly and the drive assembly; the heat dissipation component is connected in parallel with the heating component.

[0024] The heating component is used to heat the heat-conducting medium; the heat-releasing component is used to release the heat in the heat-conducting medium.

[0025] According to another aspect of the present invention, an energy storage system is also provided, which includes the battery pack temperature equalization device described in any of the above embodiments.

[0026] The control module of this embodiment acquires the module temperature of each cell module within the battery pack and controls the circulation path of the heat transfer medium in the control valve assembly based on the module temperature of each cell module. This allows the heat transfer medium to circulate between different liquid cooling plates, transferring heat from the high-temperature cell modules to the low-temperature cell modules, thus achieving temperature balance among the cell modules within the battery pack. This embodiment of the invention controls the circulation path of the heat transfer medium through the control valve assembly, enabling the heat transfer medium to circulate between different liquid cooling plates. This helps to balance the temperature of each cell module within the battery pack, reduce the temperature difference between cell modules, and improve the service life of the battery pack.

[0027] It should be understood that the description in this section is not intended to identify key or essential features of the embodiments of this utility model, nor is it intended to limit the scope of this utility model. Other features of this utility model will become readily apparent from the following description. Attached Figure Description

[0028] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0029] Figure 1 This is a schematic diagram of a battery pack temperature equalization device provided in an embodiment of the present invention;

[0030] Figure 2 This is a schematic diagram of a battery pack temperature equalization device provided in an embodiment of this utility model;

[0031] Figure 3 This is a schematic diagram of another battery pack temperature equalization device provided in this embodiment of the present invention;

[0032] Figure 4 This is a schematic diagram of another battery pack temperature equalization device provided in this embodiment of the utility model;

[0033] Figure 5 This is a schematic diagram of another battery pack temperature equalization device provided in this embodiment of the utility model;

[0034] Figure 6 This is a schematic diagram of an energy storage system provided in an embodiment of the present invention. Detailed Implementation

[0035] To enable those skilled in the art to better understand the present invention, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort should fall within the protection scope of the present invention.

[0036] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this utility model are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of the utility model described herein can be implemented in orders other than those illustrated or described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0037] This invention provides a battery pack temperature equalization device. This device is applicable to battery packs or energy storage systems, and it equalizes the temperature of each cell module within the battery pack or energy storage system, reducing the temperature difference between the cell modules and improving the battery pack's lifespan. Figure 1 This is a schematic diagram of a battery pack temperature equalization device provided in an embodiment of this utility model. The battery pack includes at least two cell modules ( Figure 1 (not shown), see reference Figure 1 The battery pack temperature equalization device includes at least two liquid cooling plates 110, a control valve assembly 120, a control module 130, and a drive assembly 140.

[0038] A liquid cooling plate 110 is configured to correspond one-to-one with a battery cell module; the liquid cooling plate 110 is used for heat exchange between the battery cell modules; a drive assembly 140 is connected to a control valve assembly 120 and a control module 130 respectively; the drive assembly 140 is used to drive the heat transfer medium to circulate between the liquid cooling plate 110 and the control valve assembly 120; the control valve assembly 120 includes at least two sets of interfaces and multiple valves; the liquid cooling plate 110 is connected to the control valve assembly 120 through the interfaces; the control valve assembly 120 controls the circulation path of the heat transfer medium by opening or closing each valve to balance the temperature of the battery pack; each valve in the control valve assembly 120 and each battery cell module are connected to the control module 130; the control module 130 is used to acquire the module temperature of each battery cell module, control the opening or closing of each valve according to the module temperature, and control the circulation direction of the heat transfer medium. The number of interfaces in the control valve assembly 120 is the same as the number of liquid cooling plates 110, and each liquid cooling plate 110 is connected to each interface of the control valve assembly 120 in a one-to-one correspondence.

[0039] Specifically, the control module 130 acquires the temperature of each cell module, i.e., the module temperature, and determines the temperature consistency of each cell module in the battery pack based on the module temperature. For example, when the temperature difference between the cell module with the highest temperature and the cell module with the lowest temperature in the battery pack exceeds a preset temperature difference threshold, the control module 130 adjusts the opening and closing of each valve in the control valve assembly 120, thereby changing the circulation path of the heat transfer medium in the control valve assembly 120, causing the heat transfer medium to circulate in the liquid cooling plate associated with the aforementioned cell module. At this time, the cell module with the highest temperature transfers heat to the heat transfer medium through the liquid cooling plate it is attached to; under the drive of the drive assembly 140, the heat transfer medium transfers heat to the liquid cooling plate attached to the cell module with the lowest temperature, and the heat transfer medium then transfers heat to the cell module with the lowest temperature through the liquid cooling plate. The control module 130 continuously acquires the module temperature of each cell module and continuously adjusts the circulation path of the heat-conducting medium according to the module temperature, thereby reducing the temperature difference between the cell modules within the battery pack. It should be noted that the preset temperature difference threshold is a pre-set maximum temperature difference value for the cell modules, which can be set according to actual needs in practical applications; this embodiment does not impose any restrictions on this. Furthermore, the combination of multiple valves in the control valve assembly 120 can form multiple circulation paths, allowing each liquid cooling plate 110 to operate independently, in series, or in parallel.

[0040] The drive assembly 140 can also control the circulation direction of the heat transfer medium, so that the heat transfer medium can flow in both directions, so as to avoid the heat transfer power of the heat transfer medium gradually decreasing in each liquid cooling plate 110 when the heat transfer medium flows in one direction, thereby further balancing the temperature of each cell module in the battery pack.

[0041] When the liquid cooling plates 110 operate in parallel or individually, the heat transfer medium exchanges the heat generated by the battery cell module to the outside. At this time, the control module 130 monitors the temperature of the battery cell module. When the temperature of the battery cell module drops to a preset temperature, the control module 130 cuts off the path to the liquid cooling plate corresponding to that battery cell module, thereby terminating the heat exchange between the heat transfer medium and the battery cell module, thus ensuring that the operating temperature of the battery cell module remains within a suitable temperature range. It should be noted that the preset temperature is a pre-set minimum temperature suitable for the battery cell module to operate at. The preset temperature can be set according to the characteristics of the battery cell module, and this embodiment does not impose any restrictions on this.

[0042] The control module 130 of this embodiment acquires the module temperature of each cell module in the battery pack and controls the circulation path of the heat transfer medium in the control valve assembly 120 according to the module temperature of each cell module. This allows the heat transfer medium to circulate in different liquid cooling plates 110, transferring heat from the high-temperature cell module to the low-temperature cell module, thus achieving temperature balance among the cell modules in the battery pack. This embodiment of the invention controls the circulation path of the heat transfer medium through the control valve assembly 120, allowing the heat transfer medium to circulate in different liquid cooling plates 110. This helps to balance the temperature of each cell module in the battery pack, reduce the temperature difference between cell modules, and improve the service life of the battery pack.

[0043] Figure 2 This is a schematic diagram of a battery pack temperature equalization device provided in an embodiment of this utility model. Optionally, based on the above embodiments, refer to... Figure 2 The control valve assembly 120 has three sets of interfaces; one set of interfaces of the control valve assembly 120 includes two connection ports; combined with Figure 1 and Figure 2 The control valve assembly 120 includes: a first valve V1, a second valve V2, a third valve V3, a fourth valve V4, a fifth valve V5, a sixth valve V6, a seventh valve V7, an eighth valve V8, a ninth valve V9, a tenth valve V10, an eleventh valve V11, a twelfth valve V12, a thirteenth valve V13, a fourteenth valve V14, a fifteenth valve V15, and a sixteenth valve V16.

[0044] The first end of the first valve V1 is connected to the drive assembly 140; the second end of the first valve V1 is connected to the first liquid cooling plate 110 via the first connection port A1 of the first group interface; the first end of the second valve V2 is connected to the first liquid cooling plate 110 via the second connection port A2 of the first group interface; the first end of the third valve V3 is connected to the drive assembly 140; the second end of the third valve V3 is connected to the first end of the fourth valve V4; the second end of the fourth valve V4 is connected to the second liquid cooling plate 110 via the first connection port B1 of the second group interface; the first end of the fifth valve V5 is connected to the second liquid cooling plate 110 via the second connection port B2 of the second group interface; the second end of the fifth valve V5 is connected to the first end of the sixth valve V6; the second end of the sixth valve V6 is connected to the drive assembly 140; the first end of the seventh valve V7 is connected to the drive assembly 140; the second end of the seventh valve V7 is connected to the third liquid cooling plate 110 via the first connection port C1 of the third group interface; the eighth valve V8... The first end, serving as the second connection port C2 of the third group interface, is connected to the third liquid cooling plate 110; the second end of the eighth valve V8 is connected to the drive assembly 140; the ninth valve V9 is connected between the second end of the first valve V1 and the second end of the fourth valve V4; the tenth valve V10 is connected between the second end of the fourth valve V4 and the second end of the seventh valve V7; the eleventh valve V11 is connected between the first end of the second valve V2 and the first end of the fifth valve V5; the twelfth valve V12 is connected between the first end of the fifth valve V5 and the first end of the eighth valve V8; the thirteenth valve V13 is connected between the first end of the first valve V1 and the second end of the fifth valve V5; the fourteenth valve V14 is connected between the first end of the second valve V2 and the second end of the seventh valve V7; the fifteenth valve V15 is connected between the first end of the fourth valve V4 and the second end of the sixth valve V6; and the sixteenth valve V16 is connected between the second end of the seventh valve V7 and the second end of the eighth valve V8.

[0045] The control terminals of the first valve V1, the second valve V2, the third valve V3, the fourth valve V4, the fifth valve V5, the sixth valve V6, the seventh valve V7, the eighth valve V8, the ninth valve V9, the tenth valve V10, the eleventh valve V11, the twelfth valve V12, the thirteenth valve V13, the fourteenth valve V14, the fifteenth valve V15, and the sixteenth valve V16 are all connected to the control module 130.

[0046] Specifically, in combination Figure 2 The following lists the control methods by which the control valve assembly 120 enables individual operation, series operation, or parallel operation of each liquid cooling plate 110:

[0047] When only the first valve V1 and the second valve V2 are opened, and the rest are closed, the first liquid cooling plate operates in a single cycle. When only the third valve V3, the fourth valve V4, the fifth valve V5, and the sixth valve V6 are opened, and the rest are closed, the second liquid cooling plate operates in a single cycle. When only the seventh valve V7 and the eighth valve V8 are opened, and the rest are closed, the third liquid cooling plate operates in a single cycle. When the first valve V1, the eleventh valve V11, the fourth valve V4, and the fifteenth valve V15 are opened, and the rest are closed, the first and second liquid cooling plates operate in series in a single cycle. When the first valve V1, the second valve V2, the third valve V3, the fourth valve V4, the fifth valve V5, and the sixth valve V6 are opened, and the rest are closed, the first and second liquid cooling plates operate in parallel in a single cycle. When the first valve V1, the fourteenth valve V14, and the eighth valve V8 are opened, and the rest are closed, the first and third liquid cooling plates operate in series in a single cycle. When the first valve V1, the second valve V2, the seventh valve V11, the eleventh valve V11, the fourth valve V4, and the fifteenth valve V15 are opened, and the rest are closed, the first and second liquid cooling plates operate in parallel in a single cycle. With valves V7 and V8 closed, the first and third liquid cooling plates operate in parallel and cycle. With valves V4, V12, V3, and V16 open, and the rest closed, the second and third liquid cooling plates operate in series and cycle. With valves V3, V4, V5, V6, V7, and V8 open, and the rest closed, the second and third liquid cooling plates operate in parallel and cycle. With valves V1, V11, V10, and V8 open, and the rest closed, the first, second, and third liquid cooling plates operate in series and cycle. With valves V1, V2, V3, V4, V5, V6, V7, and V8 open, and the rest closed, the first, second, and third liquid cooling plates operate in parallel and cycle.

[0048] Based on the above embodiments, optionally, the valve includes either a solenoid valve or a pneumatic valve. Specifically, a solenoid valve is a fluid control device that uses a magnetic field to attract or push a valve core to move; a pneumatic valve is a device that uses compressed air as a power source to drive the valve stem to move, thereby controlling the fluid in a pipeline.

[0049] Figure 3 This is a schematic diagram of another battery pack temperature equalization device provided in an embodiment of this utility model. Optionally, based on the above embodiments, refer to... Figure 3 The drive assembly 140 includes a drive unit 141 and a commutation unit 142.

[0050] The first end of the reversing unit 142 is connected to the first end of the control valve assembly 120; the second end of the reversing unit 142 is connected to the second end of the control valve assembly 120; the third end of the reversing unit 142 is connected to the first end of the drive unit 141; the fourth end of the reversing unit 142 is connected to the second end of the drive unit 141; the drive unit 141 is used to drive the heat transfer medium to circulate; the reversing unit 142 is used to change the circulation direction of the heat transfer medium.

[0051] Specifically, the reversing unit 142 reverses the circulation of the heat-conducting medium flowing out of the driving unit 141, thereby enabling bidirectional circulation of the heat-conducting medium. For example, the reversing unit 142 may include multiple valves, and by opening or closing these valves, the reversing unit 142 alters the flow path of the heat-conducting medium, i.e., changes the circulation direction of the heat-conducting medium, thereby enabling bidirectional circulation of the heat-conducting medium.

[0052] Based on the above embodiments, optionally, refer to... Figure 3 The reversing unit 142 includes: a first reversing valve V17, a second reversing valve V18, a third reversing valve V19, and a fourth reversing valve V20.

[0053] The first end of the first directional valve V17 is connected to the control valve assembly 120; the second end of the first directional valve V17 is connected to the first end of the drive unit 141; the first end of the second directional valve V18 is connected to the control valve assembly 120; the second end of the second directional valve V18 is connected to the first end of the drive unit 141; the first end of the third directional valve V19 is connected to the second end of the drive unit 141; the second end of the third directional valve V19 is connected to the first end of the second directional valve V18; the first end of the fourth directional valve V20 is connected to the second end of the drive unit 141; the second end of the fourth directional valve V20 is connected to the first end of the first directional valve V17; the control ends of the first directional valve V17, the second directional valve V18, the third directional valve V19, and the fourth directional valve V120 are all connected to the control module 130.

[0054] Specifically, when the first reversing valve V17 and the third reversing valve V19 are opened, and the second reversing valve V18 and the fourth reversing valve V20 are closed, the heat transfer medium circulates clockwise under the drive of the drive unit 141; when the second reversing valve V18 and the fourth reversing valve V20 are opened, and the first reversing valve V17 and the third reversing valve V19 are closed, the heat transfer medium circulates counterclockwise under the drive of the drive unit 141.

[0055] Based on the above embodiments, optionally, the drive unit 141 includes a circulation pump. Specifically, a circulation pump is a device used to promote the circulation of liquid in a closed loop. The working principle of the circulation pump is that the impeller is driven by a motor to rotate, generating centrifugal force, which draws the liquid into the pump body, pressurizes it, and then discharges it, thereby driving the liquid to circulate.

[0056] Figure 4 This is a schematic diagram of another battery pack temperature equalization device provided in this embodiment of the present invention. Optionally, based on the above embodiments, refer to... Figure 4 The battery pack temperature equalization device also includes a heat exchange module 150.

[0057] The first end of the control valve assembly 120 is connected to the first end of the drive assembly 140; the first end of the heat exchange module 150 is connected to the second end of the control valve assembly 120; the second end of the heat exchange module 150 is connected to the second end of the drive assembly 140; the control end of the heat exchange module 150 is connected to the control module 130; the heat exchange module 150 is used to heat or dissipate heat from the heat transfer medium.

[0058] Specifically, when the temperature of a cell module exceeds a preset high-temperature threshold or falls below a preset low-temperature threshold, the heat exchange module 150 provides auxiliary heat dissipation or heating to the heat transfer medium, thereby improving the heat exchange efficiency between the heat transfer medium and the external environment. This facilitates rapid temperature increases or decreases for each cell module and rapid temperature equalization within the battery pack. It should be noted that the preset high-temperature threshold is a pre-set threshold temperature for determining whether the heat exchange module 150 provides auxiliary heat dissipation; the preset low-temperature threshold is a pre-set threshold temperature for determining whether the heat exchange module 150 provides auxiliary heating. The preset high-temperature and preset low-temperature thresholds can be set according to actual conditions, and this embodiment does not impose any restrictions on this.

[0059] Figure 5 This is a schematic diagram of another battery pack temperature equalization device provided in this embodiment of the present invention. Optionally, based on the above embodiments, refer to... Figure 5 The heat exchange module 150 includes a heating component 151 and a heat dissipation component 152.

[0060] Heating component 151 is connected between control valve component 120 and drive component 140; heat release component 152 is connected in parallel with heating component 151; heating component 151 is used to heat the heat transfer medium; heat release component 152 is used to release heat from the heat transfer medium.

[0061] Specifically, when the module temperature of the battery cell module drops below the preset low temperature threshold, the heating component 151 provides auxiliary heating to the heat-conducting medium to quickly increase the temperature of each battery cell module; when the module temperature of the battery cell module exceeds the preset high temperature threshold, the heat dissipation component 152 provides auxiliary heat dissipation to the heat-conducting medium to quickly reduce the temperature of each battery cell module.

[0062] This utility model embodiment also provides an energy storage system. Figure 6 This is a schematic diagram of an energy storage system provided in an embodiment of this utility model. (Refer to...) Figure 6 The energy storage system 10 includes the battery pack temperature equalization device 20 provided in any of the above embodiments. The energy storage system 10 provided in this embodiment has the beneficial effects of the battery pack temperature equalization device 20 provided in any of the above embodiments, which will not be elaborated further here.

[0063] It should be understood that the various forms of the process shown above can be used, with steps reordered, added, or deleted. For example, the steps described in this utility model can be executed in parallel, sequentially, or in different orders, as long as the desired result of the technical solution of this utility model can be achieved, and this is not limited herein.

[0064] The specific embodiments described above do not constitute a limitation on the scope of protection of this utility model. Those skilled in the art should understand that various modifications, combinations, sub-combinations, and substitutions can be made according to design requirements and other factors. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the scope of protection of this utility model.

Claims

1. A battery pack temperature equalization device, characterized in that, The battery pack includes at least two cell modules, and the battery pack temperature equalization device includes at least two liquid cooling plates, a control valve assembly, a control module, and a drive assembly. The liquid cooling plate is provided in a one-to-one correspondence with the battery cell module; the liquid cooling plate is used to exchange heat between the battery cell module; the drive assembly is connected to the control valve assembly and the control module respectively; the drive assembly is used to drive the heat transfer medium to circulate in the liquid cooling plate and the control valve assembly; The control valve assembly includes at least two sets of interfaces and multiple valves; the liquid cooling plate is connected to the control valve assembly through the interfaces; the control valve assembly controls the circulation path of the heat-conducting medium by opening or closing each of the valves to balance the temperature of the battery pack. Each valve in the control valve assembly and each battery cell module are connected to the control module; the control module is used to acquire the module temperature of each battery cell module, control the opening or closing of each valve according to the module temperature, and control the circulation direction of the heat-conducting medium.

2. The battery pack temperature equalization device according to claim 1, characterized in that, The number of liquid cooling plates is the same as the number of interfaces of the control valve assembly.

3. The battery pack temperature equalization device according to claim 2, characterized in that, The control valve assembly has three sets of interfaces; each set of interfaces of the control valve assembly includes two connection ports; the control valve assembly includes: a first valve, a second valve, a third valve, a fourth valve, a fifth valve, a sixth valve, a seventh valve, an eighth valve, a ninth valve, a tenth valve, an eleventh valve, a twelfth valve, a thirteenth valve, a fourteenth valve, a fifteenth valve, and a sixteenth valve; The first end of the first valve is connected to the drive assembly; the second end of the first valve is connected to the first liquid cooling plate as the first connection port of the first group of interfaces; the first end of the second valve is connected to the first liquid cooling plate as the second connection port of the first group of interfaces; the first end of the third valve is connected to the drive assembly; the second end of the third valve is connected to the first end of the fourth valve; the second end of the fourth valve is connected to the second liquid cooling plate as the first connection port of the second group of interfaces; the first end of the fifth valve is connected to the second liquid cooling plate as the second connection port of the second group of interfaces; the second end of the fifth valve is connected to the first end of the sixth valve; the second end of the sixth valve is connected to the drive assembly; the first end of the seventh valve is connected to the drive assembly; the second end of the seventh valve is connected to the third liquid cooling plate as the first connection port of the third group of interfaces; the first end of the eighth valve is connected to the drive assembly; the second end of the seventh valve is connected to the third liquid cooling plate as the first connection port of the third group of interfaces; the first end of the eighth valve is connected to the drive assembly; the second end of the seventh valve is connected to the third liquid cooling plate as the first connection port of the third group of interfaces; the second ... third liquid cooling plate as the first connection port of the third group of interfaces; the second end of the fifth valve is connected to the drive assembly; the second end of the seventh valve is connected to the drive assembly; the second end of the seventh valve is connected to the third liquid cooling plate as the first connection port of the third group of interfaces; the second end of the eighth valve is connected to the third liquid cooling plate as the third liquid cooling plate as the third liquid cooling plate as the third liquid cooling plate as the third liquid cooling The second connection port of the third group of interfaces is connected to the third liquid cooling plate; the second end of the eighth valve is connected to the drive assembly; the ninth valve is connected between the second end of the first valve and the second end of the fourth valve; the tenth valve is connected between the second end of the fourth valve and the second end of the seventh valve; the eleventh valve is connected between the first end of the second valve and the first end of the fifth valve; the twelfth valve is connected between the first end of the fifth valve and the first end of the eighth valve; the thirteenth valve is connected between the first end of the first valve and the second end of the fifth valve; the fourteenth valve is connected between the first end of the second valve and the second end of the seventh valve; the fifteenth valve is connected between the first end of the fourth valve and the second end of the sixth valve; the sixteenth valve is connected between the second section of the seventh valve and the second end of the eighth valve. The control terminals of the first valve, the second valve, the third valve, the fourth valve, the fifth valve, the sixth valve, the seventh valve, the eighth valve, the ninth valve, the tenth valve, the eleventh valve, the twelfth valve, the thirteenth valve, the fourteenth valve, the fifteenth valve, and the sixteenth valve are all connected to the control module.

4. The battery pack temperature equalization device according to claim 3, characterized in that, The valve includes either a solenoid valve or a pneumatic valve.

5. The battery pack temperature equalization device according to claim 1, characterized in that, The drive assembly includes: a drive unit and a commutation unit; The first end of the reversing unit is connected to the first end of the control valve assembly; the second end of the reversing unit is connected to the second end of the control valve assembly; the third end of the reversing unit is connected to the first end of the drive unit; and the fourth end of the reversing unit is connected to the second end of the drive unit. The driving unit is used to drive the heat-conducting medium to circulate; the reversing unit is used to change the circulation direction of the heat-conducting medium.

6. The battery pack temperature equalization device according to claim 5, characterized in that, The reversing unit includes: a first reversing valve, a second reversing valve, a third reversing valve, and a fourth reversing valve; The first end of the first directional valve is connected to the control valve assembly; the second end of the first directional valve is connected to the first end of the drive unit; the first end of the second directional valve is connected to the control valve assembly; the second end of the second directional valve is connected to the first end of the drive unit; the first end of the third directional valve is connected to the second end of the drive unit; the second end of the third directional valve is connected to the first end of the second directional valve; the first end of the fourth directional valve is connected to the second end of the drive unit; the second end of the fourth directional valve is connected to the first end of the first directional valve; the control ends of the first directional valve, the second directional valve, the third directional valve, and the fourth directional valve are all connected to the control module.

7. The battery pack temperature equalization device according to claim 5, characterized in that, The drive unit includes a circulating pump.

8. The battery pack temperature equalization device according to any one of claims 1-7, characterized in that, Also includes: Heat exchange module; The first end of the control valve assembly is connected to the first end of the drive assembly; the first end of the heat exchange module is connected to the second end of the control valve assembly; the second end of the heat exchange module is connected to the second end of the drive assembly; the control end of the heat exchange module is connected to the control module. The heat exchange module is used to heat or dissipate heat from the heat-conducting medium.

9. The battery pack temperature equalization device according to claim 8, characterized in that, The heat exchange module includes: a heating component and a heat dissipation component; The heating component is connected between the control valve assembly and the drive assembly; the heat dissipation component is connected in parallel with the heating component. The heating component is used to heat the heat-conducting medium; the heat-releasing component is used to release the heat in the heat-conducting medium.

10. An energy storage system, characterized in that, Includes the battery pack temperature equalization device as described in any one of claims 1-9.

Images