CN220569769U - Thermal management mechanism and energy storage device - Google Patents

Abstract

The application relates to a thermal management mechanism and an energy storage device. The thermal management mechanism includes a pump, a first conduit, and at least two expansion tanks. The pump has an inlet and an outlet, the first pipeline is respectively communicated with the inlet and the liquid outlet of the pump, and the outlet of the pump is communicated with the liquid inlet. The at least two expansion tanks include a first expansion tank in communication with the first conduit and at least a second expansion tank configured to be selectively in communication with the first conduit. The application requirements of the thermal management mechanism with different volumes of cooling liquid can be met, and the risk of sealing failure of the thermal management mechanism can be well reduced.

Description

Thermal management mechanism and energy storage device

Technical Field

The present disclosure relates to battery technology, and more particularly, to a thermal management mechanism and an energy storage device.

Background

In order to ensure normal use of the battery, a liquid cooling system is generally used for carrying out heat management on the battery, however, the conventional liquid cooling system has a risk of sealing failure.

Disclosure of Invention

Based on this, it is necessary to provide a thermal management mechanism and an energy storage device for solving the problem that the conventional liquid cooling system has a risk of sealing failure.

According to a first aspect of the present application, a thermal management mechanism is provided for a battery having a flow channel with a liquid inlet and a liquid outlet. The thermal management mechanism includes a pump, a first conduit, and at least two expansion tanks. The pump has an inlet and an outlet, the first pipeline is respectively communicated with the inlet and the liquid outlet of the pump, and the outlet of the pump is communicated with the liquid inlet. The at least two expansion tanks include a first expansion tank in communication with the first conduit and at least a second expansion tank configured to be selectively in communication with the first conduit.

In the technical scheme of the application, as the first pipeline is respectively communicated with the inlet and the liquid outlet of the pump, and the outlet of the pump is communicated with the liquid inlet, the first pipeline is communicated with the liquid flow channel to form a cooling liquid loop for cooling liquid to flow, and the cooling liquid in the cooling liquid loop can flow into the liquid flow channel so as to perform heat management on the battery; because the first expansion tank is communicated with the first pipeline, the second expansion tank is configured to be capable of being selectively communicated with the first pipeline, so that when the cooling liquid volume of the cooling liquid circuit is smaller, one expansion tank is selected to be communicated with the first pipeline, namely the first expansion tank is communicated with the first pipeline, and the second expansion tank is not communicated with the first pipeline, and because the volume of the cooling liquid in the cooling liquid circuit is smaller at the moment, the volume change of the cooling liquid is smaller when the temperature change of the cooling liquid is caused, and one expansion tank can well absorb the increased cooling liquid when the temperature of the cooling liquid is increased, and can also well supplement the cooling liquid circuit when the temperature of the cooling liquid is reduced; by analogy, when the volume of the cooling liquid in the cooling liquid loop is large, at least one second expansion tank is communicated with the first pipeline, so that the liquid suction requirement and the liquid supplementing requirement of the cooling liquid loop with larger volume are met, the application requirements of the thermal management mechanism with cooling liquid with different volumes can be met, and the risk of sealing failure of the thermal management mechanism can be well reduced.

In one embodiment, the thermal management mechanism further comprises a first connecting pipe and at least one second connecting pipe, wherein the first connecting pipe is arranged on the first pipeline and is communicated with the first pipeline, one end of the first connecting pipe away from the first pipeline is communicated with the first expansion tank, and the second connecting pipe corresponds to the second expansion tank and is configured to be capable of being selectively communicated with the corresponding second expansion tank. When the volume of the cooling liquid in the cooling liquid loop is smaller, one expansion tank is selected to be communicated with the first pipeline, namely the first expansion tank is communicated with the first pipeline, and the second expansion tank is not communicated with the first pipeline; and when the volume of the cooling liquid in the cooling liquid loop is larger, the second connecting pipe is communicated with the corresponding second expansion tank, so that at least one second expansion tank is communicated with the first pipeline, and the liquid suction requirement and the liquid supplementing requirement of the cooling liquid loop with larger volume are met.

In one embodiment, the second connecting tube has an interface end disposed away from the first tube, and the thermal management mechanism further includes a plug adapted to the interface end, the interface end being detachably connected to the plug, or the interface end being detachably in communication with a corresponding second expansion tank. When the volume of the cooling liquid in the cooling liquid loop is smaller and the second expansion tank is not communicated with the first pipeline, the interface end can be detachably connected with the plug, so that the plug is utilized to plug the interface end, and at the moment, the second connecting pipe is not communicated with the corresponding second expansion tank. When the volume of the cooling liquid in the cooling liquid loop is large and the second expansion tank is required to be communicated with the first pipeline, the interface end can be detachably communicated with the corresponding second expansion tank.

In one embodiment, the thermal management mechanism further comprises a third connecting tube for communicating the interface end with the second expansion tank, the third connecting tube having a first end adapted to the interface end and a second end disposed opposite the first end, the second end being detachably connected to the corresponding second expansion tank. When the second expansion tank and the first pipeline are required to be blocked, the third connecting pipe is conveniently detached, and the plug is plugged on the interface end.

In one embodiment, the second connection tube comprises a quick connector configured to be selectively communicable with a corresponding second expansion tank. The connection efficiency between the second connecting pipe and the corresponding second expansion tank can be improved through the quick connector, the connection efficiency between the second connecting pipe and the plug can be improved through the quick connector, and then the adjustment efficiency of the thermal management mechanism in adjusting the liquid absorption requirement and the liquid supplementing requirement of the cooling liquid loop can be improved.

In one embodiment, a control valve is provided on the second connecting tube, the control valve being configured to be able to communicate or block the first conduit and the corresponding second expansion tank. Thus, when the coolant volume of the coolant loop is small and the second expansion tank is not required to be in communication with the first pipeline, the first pipeline and the corresponding second expansion tank can be blocked by adjusting the control valve. When the coolant volume of the coolant circuit is large and the second expansion tank is required to communicate with the first pipe, the first pipe and the corresponding second expansion tank can be made to communicate with each other by adjusting the control valve.

In one embodiment, the control valve comprises a shut-off valve. The shut-off valve may be utilized to better block the first conduit and corresponding second expansion tank, improving the reliability of thermal management mechanism 100.

In one embodiment, the volumes of the at least two expansion tanks are different from each other. The expansion tanks with different volumes are utilized to better regulate and control the liquid suction requirement and the liquid supplementing requirement of the cooling liquid loop so as to well reduce the risk of sealing failure of the thermal management mechanism.

In one embodiment, the thermal management mechanism further comprises a heat exchanger (150) having a first heat exchange channel and a second heat exchange channel for exchanging heat with the first heat exchange channel, and a cooler in communication with the first heat exchange channel of the heat exchanger, the second heat exchange channel of the heat exchanger being in communication between the outlet of the pump and the liquid inlet. In this way, the heat exchanger and the cooler can be used to radiate heat from the battery well.

In one embodiment, the thermal management mechanism further comprises a second pipeline and an expansion valve arranged on the second pipeline, and the cooler is communicated with the first heat exchange channel of the heat exchanger through the second pipeline. An expansion valve may be utilized to throttle the pressure reduction and regulate the flow of fluid in the second conduit.

In one embodiment, a heater is further provided on the first pipe. When the temperature of the environment where the thermal management mechanism is located is low, the heater can be used for heating the cooling liquid in the first pipeline so as to keep the temperature of the battery at a proper temperature.

According to a second aspect of the present application, there is provided an energy storage device comprising the thermal management mechanism of any of the embodiments described above.

In one embodiment, the energy storage device further comprises a housing and a battery, and the first conduit, the pump, the battery and the first expansion tank are disposed within the housing. The pump, battery, first expansion tank, etc. may be protected by a housing.

In one embodiment, the second expansion tank is disposed outside the housing. The second expansion tank is arranged outside the shell, so that the occupied space in the shell can be saved, more space is reserved for other parts of the thermal management mechanism such as a heat exchanger and a cooler, and the thermal management mechanism can be improved in heat treatment capacity and energy efficiency.

In one embodiment, the second expansion tank is removably disposed outside the housing. Therefore, the second expansion tanks are conveniently disassembled and assembled outside the shell according to the requirement, and the application flexibility of the thermal management mechanism can be better improved according to the second expansion tanks with proper quantity which are disassembled and assembled outside the shell.

Drawings

Fig. 1 shows a schematic structural diagram of an energy storage device according to an embodiment of the present application.

FIG. 2 illustrates a schematic structural diagram of a thermal management mechanism in an embodiment of the present application.

Fig. 3 shows an enlarged schematic view at a of fig. 1.

Fig. 4 shows a schematic structural diagram of an energy storage device according to an embodiment of the present application (when the second expansion tank is mounted outside the casing).

In the figure: 10. an energy storage device;

100. a thermal management mechanism;

110. a pump; 111. an inlet; 112. an outlet;

120. a first pipeline;

131. a first expansion tank; 132. a second expansion tank; 133. a mounting frame;

141. a first connection pipe; 142. a second connection pipe; 1421. an interface end; 143. a third connection pipe;

150. a heat exchanger; 160. a cooler; 170. a second pipeline; 171. an expansion valve; 180. a heater; 191. a third pipeline; 192. a compressor;

200. a battery;

300. and a housing.

Detailed Description

In order to make the above objects, features and advantages of the present application more comprehensible, embodiments accompanied with figures are described in detail below. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present application. This application is, however, susceptible of embodiment in many other forms than those described herein and similar modifications can be made by those skilled in the art without departing from the spirit of the application, and therefore the application is not to be limited to the specific embodiments disclosed below.

In the description of the present application, it should be understood that, if there are terms such as "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., these terms refer to the orientation or positional relationship based on the drawings, which are merely for convenience of description and simplification of description, and do not indicate or imply that the apparatus or element referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the present application.

Furthermore, the terms "first," "second," and the like, if any, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In the description of the present application, the terms "plurality" and "a plurality" if any, mean at least two, such as two, three, etc., unless specifically defined otherwise.

In this application, unless explicitly stated and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly. For example, the two parts can be fixedly connected, detachably connected or integrated; can be mechanically or electrically connected; either directly or indirectly, through intermediaries, or both, may be in communication with each other or in interaction with each other, unless expressly defined otherwise. The specific meaning of the terms in this application will be understood by those of ordinary skill in the art as the case may be.

In this application, unless expressly stated or limited otherwise, the meaning of a first feature being "on" or "off" a second feature, and the like, is that the first and second features are either in direct contact or in indirect contact through an intervening medium. Moreover, a first feature being "above," "over" and "on" a second feature may be a first feature being directly above or obliquely above the second feature, or simply indicating that the first feature is level higher than the second feature. The first feature being "under", "below" and "beneath" the second feature may be the first feature being directly under or obliquely below the second feature, or simply indicating that the first feature is less level than the second feature.

It will be understood that if an element is referred to as being "fixed" or "disposed" on another element, it can be directly on the other element or intervening elements may also be present. If an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and the like as used herein, if any, are for descriptive purposes only and do not represent a unique embodiment.

In the related art, the liquid cooling system further comprises an expansion tank, when the cooling liquid is at a high temperature, the volume of the cooling liquid in the cooling loop of the liquid cooling system is increased, and the expansion tank can absorb the increased cooling liquid; when the cooling liquid is at low temperature, the volume of the cooling liquid in the cooling loop of the liquid cooling system is reduced, the liquid cooling system can be in a liquid shortage state, and the liquid can be replenished through the expansion tank. However, conventional liquid cooling systems still suffer from seal failure.

In order to solve the problem that traditional liquid cooling system exists sealed inefficacy risk, designed a thermal management mechanism in this application, including first expansion tank and second expansion tank, can make second expansion tank and thermal management mechanism's coolant liquid return circuit intercommunication as required, can satisfy the application demand of thermal management mechanism that has different volume coolant liquids, reduce thermal management mechanism sealed inefficacy risk.

The thermal management mechanisms disclosed in embodiments of the present application may be used in, but are not limited to, energy storage devices. The energy storage device not only can be used as a matched energy storage application of a wind power plant, a photovoltaic power station, a thermal power plant and the like, but also can provide energy supply for various power-shortage and power-consumption households, such as a big data center, a cold chain logistics park, a distribution network station area, a line side, multi-station integration, an oil depot, a business area, a hospital or a 5G base station and the like. The energy storage device may include the thermal management mechanism disclosed herein, which may improve the safety of the energy storage device.

Fig. 1 shows a schematic structural diagram of an energy storage device 10 according to an embodiment of the present application, and fig. 2 shows a schematic structural diagram of a thermal management mechanism 100 according to an embodiment of the present application.

Referring to fig. 1 and 2, a thermal management mechanism 100 is provided in an embodiment of the present application and is used for a battery 200, where the battery 200 has a flow channel, and the flow channel has a liquid inlet and a liquid outlet.

The thermal management mechanism 100 includes a pump 110, a first pipeline 120 and at least two expansion tanks, the pump 110 has an inlet 111 and an outlet 112, the first pipeline 120 is respectively communicated with the inlet 111 and the outlet of the pump 110, the outlet 112 of the pump 110 is communicated with the liquid inlet, so that the first pipeline 120 and the liquid flow channel are communicated to form a cooling liquid loop for flowing cooling liquid, and the cooling liquid in the cooling liquid loop can flow into the liquid flow channel to thermally manage the battery 200.

The at least two expansion tanks include a first expansion tank 131 and at least a second expansion tank 132, the first expansion tank 131 being in communication with the first conduit 120, the second expansion tank 132 being configured to be selectively in communication with the first conduit 120.

A control valve for controlling the on-off of the first expansion tank 131 and the first pipeline 120 can be arranged on the pipeline connected with the first expansion tank 132, and the second expansion tank 132 can be selectively communicated with the first pipeline 120 by regulating the control valve; of course, the present application is not limited in this regard and other means may be employed to selectively place the second expansion tank 132 in communication with the first conduit 120.

"the second expansion tank 132 is configured to be selectively communicable with the first conduit 120" means that whether the second expansion tank 132 is communicable with the first conduit 120 may be selected as desired. The second expansion tank 132 may be in communication with the first conduit 120, or the second expansion tank 132 may not be in communication with the first conduit 120.

In this application, at least one expansion tank is disposed at the inlet 111 of the pump 110, and can play a role in constant-pressure water replenishing, so as to ensure stable operation of the pump 110. When the volume of the cooling liquid in the cooling liquid loop is smaller, an expansion tank is selected to be communicated with the first pipeline 120, namely the first expansion tank 131 is communicated with the first pipeline 120, the second expansion tank 132 is not communicated with the first pipeline 120, and the volume of the cooling liquid in the cooling liquid loop is smaller when the temperature of the cooling liquid is changed at the moment, so that the volume change of the cooling liquid is smaller when the temperature of the cooling liquid is changed, and one expansion tank can well absorb the increased cooling liquid when the temperature of the cooling liquid is increased, and can also well supplement the cooling liquid loop when the temperature of the cooling liquid is reduced; by analogy, when the volume of the cooling liquid in the cooling liquid loop is larger, at least one second expansion tank 132 is selected to be communicated with the first pipeline 120 so as to meet the liquid suction requirement and the liquid supplementing requirement of the cooling liquid loop with larger volume, thus, the application requirements of the thermal management mechanism 100 with cooling liquid with different volumes can be met, and the risk of sealing failure of the thermal management mechanism 100 can be well reduced.

In some embodiments, the thermal management mechanism 100 further includes a first connection pipe 141 disposed on the first pipeline 120 and in communication with the first pipeline 120, and at least one second connection pipe 142, the first connection pipe 141 communicating with the first expansion tank 131 at an end remote from the first pipeline 120, the second connection pipe 142 corresponding to the second expansion tank 132 and configured to be selectively communicable with the corresponding second expansion tank 132.

The "second connection pipe 142 corresponds to the second expansion tank 132" may be that the second connection pipe 142 corresponds to the second expansion tank 132 one by one, or may be that the second connection pipe 142 corresponds to at least one second expansion tank 132, for example, a control valve on the second connection pipe 142 can control on-off between the second expansion tank 132 and the first pipeline 120, so as to enable the at least one second expansion tank 132 to communicate with the first pipeline 120 as required.

When the volume of the cooling liquid in the cooling liquid loop is small, one expansion tank is selected to be communicated with the first pipeline 120, namely the first expansion tank 131 is communicated with the first pipeline 120, and the second expansion tank 132 is not communicated with the first pipeline 120; the second connection pipe 142 may also be connected to the corresponding second expansion tank 132 when the cooling liquid volume of the cooling liquid circuit is larger, so that at least one second expansion tank 132 is connected to the first pipeline 120 to meet the liquid suction requirement and the liquid supplement requirement of the cooling liquid circuit with larger volume.

In some embodiments, the second connection tube 142 is in one-to-one correspondence with the second expansion tanks 132, so that a suitable number of second expansion tanks 132 are conveniently adjusted to communicate with the first conduit 120 as needed to better meet the liquid suction and liquid replenishment requirements of the coolant circuit of the thermal management structure 100.

In some embodiments, referring to fig. 3, the second connection tube 142 has a port end 1421 disposed away from the first conduit 120, and the thermal management structure 100 further includes a plug adapted to the port end 1421, the port end 1421 being removably connected to the plug, or the port end 1421 being removably connected to the corresponding second expansion tank 132.

When the volume of the cooling fluid in the cooling fluid circuit is smaller and the second expansion tank 132 is not required to be communicated with the first pipeline 120, the interface end 1421 can be detachably connected with the plug, so that the plug is utilized to plug the interface end 1421, and at this time, the second connection pipe 142 is not communicated with the corresponding second expansion tank 132. When the coolant volume of the coolant circuit is large and communication between the second expansion tank 132 and the first conduit 120 is desired, the port 1421 may be removably coupled to the corresponding second expansion tank 132.

In some embodiments, the thermal management mechanism 100 further includes a third connecting tube 143 for communicating the interface port 1421 and the second expansion tank 132, the third connecting tube 143 having a first end that mates with the interface port 1421 and a second end disposed opposite the first end. The second end is detachably connected to a corresponding second expansion tank 132.

When the interface end 1421 is required to be communicated with the corresponding second expansion tank 132, the first end of the third connecting pipe 143 can be connected with the interface end 1421 in an adaptive manner, and the second end of the third connecting pipe 143 is detachably connected with the second expansion tank 132, so that the third connecting pipe 143 can be conveniently detached and the plug can be plugged on the interface end 1421 when the second expansion tank 132 and the first pipeline 120 are required to be blocked.

In some embodiments, the second connection tube 142 includes a quick-connect fitting configured to selectively communicate with a corresponding second expansion tank 132.

In this way, the connection efficiency between the second connection pipe 142 and the corresponding second expansion tank 132 can be improved through the quick connector, and the connection efficiency between the second connection pipe 142 and the plug can be improved through the quick connector, so that the adjustment efficiency of the thermal management mechanism 100 when adjusting the liquid absorption requirement and the liquid replenishment requirement of the cooling liquid circuit can be improved.

In other embodiments, a control valve is provided on the second connecting tube 142 and is configured to communicate or block the first conduit 120 and the corresponding second expansion tank 132.

In this manner, when the coolant volume of the coolant circuit is small and the second expansion tank 132 is not required to communicate with the first pipe 120, the first pipe 120 and the corresponding second expansion tank 132 can be blocked by adjusting the control valve. When the coolant volume of the coolant circuit is large and the second expansion tank 132 is required to communicate with the first pipe 120, the first pipe 120 and the corresponding second expansion tank 132 may be communicated with each other by adjusting the control valve.

In this embodiment, the control valve comprises a shut-off valve.

The shut-off valve may be utilized to better block the first conduit 120 and the corresponding second expansion tank 132, improving the reliability of the thermal management mechanism 100.

In some embodiments, the volumes of the at least two expansion tanks are different from each other.

The volumes of the first expansion tank 131 and the second expansion tank 132 may be different from each other, or the volumes of the two second expansion tanks 132 may be different from each other, and are not particularly limited herein.

The expansion tanks with different volumes are utilized to better regulate and control the liquid suction requirement and the liquid supplementing requirement of the cooling liquid loop so as to well reduce the risk of sealing failure of the thermal management mechanism.

In some embodiments, the thermal management mechanism 100 further includes a heat exchanger 150 and a cooler 160, the heat exchanger 150 having a first heat exchange channel and a second heat exchange channel for exchanging heat with the first heat exchange channel, the cooler 160 being in communication with the first heat exchange channel of the heat exchanger 150, the second heat exchange channel of the heat exchanger 150 being in communication between the outlet 112 of the pump 110 and the liquid inlet.

In this way, the coolant flowing into the battery 200 can flow into the second heat exchange passage, exchange heat with the heat exchange medium in the first heat exchange passage, and dissipate heat from the heat exchange medium in the first heat exchange passage by the cooler 160, so that the heat exchanger 150 and the cooler 160 can be used to dissipate heat from the battery 200 well.

In some embodiments, the thermal management mechanism 100 further includes a second conduit 170 and an expansion valve 171 disposed on the second conduit 170, the cooler 160 being in communication with the first heat exchange passage of the heat exchanger 150 through the second conduit 170.

An expansion valve 171 may be utilized to throttle the pressure reduction and regulate the flow of fluid within the second conduit 170.

In some embodiments, the thermal management mechanism 100 further includes a third pipeline 191 and a compressor 192, an end of the second pipeline 170 remote from the cooler 160 is in communication with an end of the first heat exchange channel, an end of the third pipeline 191 is in communication with an other end of the first heat exchange channel, an other end of the third pipeline 191 is in communication with an end of the cooler 160 remote from the second pipeline 170, and the compressor 192 is disposed on the third pipeline 191.

After the heat exchange medium is pressurized by the compressor 192, the high-temperature and high-pressure heat exchange medium passes through the cooler 160 and the expansion valve 171, and can be changed back to the low-temperature and low-pressure liquid heat exchange medium, so as to perform circulating refrigeration.

In some embodiments, a heater 180 is also provided on the first conduit 120.

Alternatively, the heater 180 may be a water heater, but the present application is not limited thereto, and the heater 180 may be other devices capable of heating the first pipe 120, such as a heating resistance wire wound around the first pipe 120.

When the temperature of the environment in which the thermal management structure 100 is located is low, the heater 180 may be used to heat the coolant in the first conduit 120 to maintain the temperature of the battery 200 at a suitable temperature.

In some embodiments, the expansion tank has a volume V, and the expansion tank allows for an expansion volume V ₁ The cooling liquid has a temperature T ₂ Density at ρ ₂ Wherein V is ₁ ＝[(P ₂ -P ₁ )/P ₂ -(P ₃ -P ₁ )/P ₃ ]×V，P ₁ To pre-charge absolute pressure of expansion tank, P ₂ For maximum absolute pressure allowed during operation of thermal management mechanism 100, P ₃ Is the static pressure value of the coolant circuit of thermal management mechanism 100 at the time of first fill.

The total volume of coolant in the coolant loop of the thermal management mechanism 100 is C, and the coolant is at a temperature T ₁ Density at ρ ₁ At the temperature T of the cooling liquid ₁ Heating to T ₂ In the case of (a), the volume of the coolant in the coolant circuit of the thermal management mechanism 100 increases by C ₀ ，C ₀ ＝C×(ρ ₁ /ρ ₂ )-C。

Thus, by providing a suitable number of expansion tanks, the appropriate number of expansion tanks can be placed in communication with the first conduit 120 such that C ₀ Less than or equal to V for all expansion tanks in communication with the first conduit 120 ₁ Is a sum of (a) and (b).

Taking the cooling liquid as the glycol aqueous solution for illustration, P ₁ 1.5bar, P ₂ 4.5bar, P ₃ At 2.5bar, the first expansion tank 131 is in communication with the first conduit 120, the second expansion tank 132 is not in communication with the first conduit 120, the volume of the first expansion tank 131 is V, v=8l, the total volume of coolant in the coolant loop of the thermal management mechanism 100 is C, c=125l, T ₁ In the case of =20deg.C, the density of the cooling liquid is 1073.35kg/m ³ I.e. ρ ₁ 1073.35kg/m ³ The method comprises the steps of carrying out a first treatment on the surface of the At T ₂ In the case of=55℃, the density of the cooling liquid was 1055.13kg/m ³ I.e. ρ ₂ 1055.13kg/m ³ 。

Thus V _1＝ [(4.5-1.5)/4.5-(2.5-1.5)/1.5]×8＝2.16L，C ₀ The volume of the cooling fluid in the cooling fluid circuit is smaller, and the expansion tank 131 is set to communicate with the first pipeline 120 to meet the fluid suction requirement and the fluid replenishment requirement of the cooling fluid circuit of the thermal management mechanism 100, so that the risk of sealing failure of the thermal management mechanism 100 can be effectively reduced.

By analogy, in other cases, for example, in the case of a large volume of the cooling liquid in the cooling liquid circuit, whether the expansion tank communicated with the first pipeline 120 meets the liquid suction requirement and the liquid replenishing requirement of the cooling liquid circuit of the thermal management mechanism 100 can be judged according to the calculation mode, so that the expansion tanks are further adjusted to be communicated with the first pipeline 120 in a proper number, and the overall structure of all the expansion tanks communicated with the first pipeline 120 can meet the liquid suction requirement and the liquid replenishing requirement of the cooling liquid circuit of the thermal management mechanism 100, so that the risk of sealing failure of the thermal management mechanism 100 is well reduced.

An embodiment of the present application provides an energy storage device 10 including the thermal management mechanism 100 of any of the embodiments described above.

In some embodiments, the energy storage device 10 further includes a housing 300 and a battery 200, and the first conduit 120, the pump 110, the battery 200, and the first expansion tank 131 are disposed within the housing 300.

The pump 110, the battery 200, the first expansion tank 131, and the like may be protected by the casing 300.

In some embodiments, referring to fig. 4, the second expansion tank 132 is disposed outside the housing 300.

It will be appreciated that the first expansion tank 131 is a basic expansion tank, the second expansion tank 132 is a backup expansion tank, and the second expansion tank 132 is disposed outside the enclosure 300, so as to save space in the enclosure 300, so as to leave more space for other components of the thermal management mechanism 100, such as the heat exchanger 150 and the cooler 160, etc., such as the cooler 160 with greater energy efficiency, which is beneficial to improving the heat treatment capability and energy efficiency of the thermal management mechanism 100.

In some embodiments, the second expansion tank 132 is removably disposed outside the housing 300.

The second expansion tank 132 may be detachably connected directly to the outer wall of the casing 300, or the second expansion tank 132 may be detachably connected indirectly to the outer wall of the casing 300.

Illustratively, the second expansion tank 132 is detachably coupled to the outer wall of the cabinet 300 by a mounting bracket 133.

In this way, the second expansion tank 132 can be conveniently assembled and disassembled outside the casing 300 as required, and a proper number of second expansion tanks 132 can be assembled and disassembled outside the casing 300 as required, so that the application flexibility of the thermal management mechanism 100 can be better improved.

In some embodiments, the pump 110, the first pipe 120, the first expansion tank 131, the battery 200, the first connection pipe 141, the second connection pipe 142, the heat exchanger 150, the cooler 160, the second pipe 170, the expansion valve 171, the heater 180, the third pipe 191, and the compressor 192 are all disposed within the casing 300. The second expansion tank 132 is disposed outside the casing 300, the interface end 1421 of the second connection pipe 142 is detachably connected to the first end of the third connection pipe 143, and the second end of the third connection pipe 143 passes through the casing 300 and is detachably connected to the second expansion tank 132 outside the casing 300. Thermal management mechanism 100 also includes a plug that mates with interface end 1421.

By utilizing the thermal management mechanism 100, on one hand, the application requirements of the thermal management mechanism with different volumes of cooling liquid can be met, and the risk of sealing failure of the thermal management mechanism 100 can be well reduced; on the other hand, the internal space utilization of the cabinet 300 can be improved, which is advantageous in improving the heat treatment capability and energy efficiency of the thermal management mechanism 100.

The technical features of the above-described embodiments may be arbitrarily combined, and all possible combinations of the technical features in the above-described embodiments are not described for brevity of description, however, as long as there is no contradiction between the combinations of the technical features, they should be considered as the scope of the description.

The above examples only represent a few embodiments of the present application, which are described in more detail and are not to be construed as limiting the scope of the claims. It should be noted that it would be apparent to those skilled in the art that various modifications and improvements could be made without departing from the spirit of the present application, which would be within the scope of the present application. Accordingly, the scope of protection of the present application is to be determined by the claims appended hereto.

Claims (15)

1. A thermal management mechanism (100) for a battery (200), the battery (200) having a flow channel with a liquid inlet and a liquid outlet; the thermal management mechanism (100) comprises:

a pump (110) and a first conduit (120), the pump (110) having an inlet (111) and an outlet (112), the first conduit (120) being in communication with the inlet (111) and the outlet of the pump (110), respectively, the outlet (112) of the pump (110) being in communication with the inlet; and

at least two expansion tanks, comprising a first expansion tank (131) and at least a second expansion tank (132); the first expansion tank (131) is in communication with the first conduit (120), and the second expansion tank (132) is configured to be selectively in communication with the first conduit (120).

2. The thermal management mechanism (100) of claim 1, wherein the thermal management mechanism (100) further comprises a first connection tube (141) and at least a second connection tube (142) disposed on the first conduit (120) and in communication with the first conduit (120);

-one end of the first connecting pipe (141) remote from the first conduit (120) is in communication with the first expansion tank (131);

the second connection tube (142) corresponds to the second expansion tank (132) and is configured to be selectively communicable with the corresponding second expansion tank (132).

3. The thermal management mechanism (100) of claim 2, wherein the second connecting tube (142) has an interface end (1421) disposed away from the first conduit (120), the thermal management mechanism (100) further comprising a plug adapted to the interface end (1421);

the interface end (1421) is detachably connected with the plug, or the interface end (1421) is detachably communicated with the corresponding second expansion tank (132).

4. A thermal management mechanism (100) according to claim 3, wherein the thermal management mechanism (100) further comprises a third connecting tube (143) for communicating the interface end (1421) with the second expansion tank (132), the third connecting tube (143) having a first end adapted to the interface end (1421) and a second end arranged opposite to the first end;

the second end is detachably connected to a corresponding second expansion tank (132).

5. The thermal management mechanism (100) of claim 2, wherein the second connection tube (142) comprises a quick-connect fitting configured to selectively communicate with the corresponding second expansion tank (132).

6. The thermal management mechanism (100) of claim 2, wherein the second connection tube (142) is provided with a control valve configured to communicate or block the first conduit (120) and the corresponding second expansion tank (132).

7. The thermal management mechanism (100) of claim 6, wherein the control valve comprises a shut-off valve.

8. The thermal management mechanism (100) of any of claims 1-7, wherein the volumes of at least two of the expansion tanks are different from each other.

9. The thermal management mechanism (100) of any of claims 1-7, wherein the thermal management mechanism (100) further comprises a heat exchanger (150) and a cooler (160), the heat exchanger (150) having a first heat exchange channel and a second heat exchange channel for exchanging heat with the first heat exchange channel;

the cooler (160) is communicated with a first heat exchange channel of the heat exchanger (150);

the second heat exchange channel of the heat exchanger (150) is communicated between an outlet (112) of the pump (110) and the liquid inlet.

10. The thermal management mechanism (100) of claim 9, wherein the thermal management mechanism (100) further comprises a second conduit (170) and an expansion valve (171) disposed on the second conduit (170);

the cooler (160) is in communication with the first heat exchange passage of the heat exchanger (150) through the second conduit (170).

11. The thermal management mechanism (100) of any of claims 1-7, wherein a heater (180) is further provided on the first conduit (120).

12. An energy storage device comprising a thermal management mechanism (100) according to any of claims 1-11.

13. The energy storage device of claim 12, further comprising a housing (300) and a battery (200);

the first pipeline (120), the pump (110), the battery (200) and the first expansion tank (131) are all arranged in the shell (300).

14. The energy storage device of claim 13, wherein the second expansion tank (132) is disposed outside the housing (300).

15. The energy storage device of claim 14, wherein the second expansion tank (132) is removably disposed outside the housing (300).