Liquid-cooled battery and dynamic distribution system thereof

Abstract

The present invention provides a liquid-cooled battery and a dynamic distribution system thereof. The liquid-cooled battery comprises a battery cell, a dynamic regulating valve and a liquid cooling plate, the liquid cooling plate being connected to the battery cell. The dynamic regulating valve is internally provided with an elastic membrane so as to divide the internal space of the dynamic regulating valve into a temperature sensing cavity and a liquid storage cavity; the cavity wall of the liquid storage cavity is provided with a liquid inlet and a liquid outlet, the liquid inlet being used for introducing a cooling liquid into the liquid storage cavity, and the liquid outlet communicating the liquid storage cavity and the internal space of the liquid cooling plate; an inert gas is placed in the temperature sensing cavity and is in contact with the outer surface of the battery cell, the volume of the inert gas changing at a preset temperature; and the elastic membrane has a moving direction facing the temperature sensing cavity or the liquid storage cavity. The dynamic regulating valve regulates and controls the temperature of the battery cell in real time, the precision of the dynamic regulating valve is improved by means of the inert gas, and a single dynamic regulating valve performs temperature regulation and control on a corresponding single battery cell, such that temperature changes of a single battery cell do not affect other battery cells, thus reducing the temperature difference between a plurality of battery cells, and improving the safety and stability of liquid-cooled batteries.

Description

Liquid-cooled battery and dynamic distribution system thereof Technical Field

[0001] The present invention belongs to the technical field of heat dissipation of electronic devices, and in particular relates to a liquid-cooled battery and a dynamic distribution system thereof. Background Art

[0002] The optimal operating temperature of energy storage batteries is between 15 and 35°C. Temperatures above 40°C or below 0°C will cause rapid degradation of battery life. Therefore, various thermal management systems are designed for energy storage batteries to cool the batteries. This ensures that the battery temperature is stable both in standby mode and during startup, charging, and discharging.

[0003] The cooling source dissipates the heat generated by liquid-cooled batteries during operation into the atmosphere via a liquid cooling plate. The liquid cooling plate acts as a heat sink for the energy storage battery, dissipating heat and cooling the battery. Under current technology, liquid cooling plates can only provide a fixed coolant flow rate (typically ethylene glycol) to each battery cell, failing to account for the varying heat generation of each cell during operation. This results in large temperature variations between cells (currently, the temperature difference between liquid-cooled cells within a battery pack is ≥3°C). Temperature variations between cells are the primary cause of inconsistencies in battery operation. Poor consistency directly reduces system lifespan, as temperature variations impact battery lifespan; greater temperature variations shorten battery lifespan. Furthermore, with current fixed flow rates, thermal runaway cannot be prevented, leading to battery failure and potentially safety incidents. Technical issues

[0004] The technical problem to be solved by the present invention is to provide a liquid-cooled battery and a dynamic distribution system thereof, aiming to solve the problem that the temperature of a single battery cell in a battery pack cannot be individually regulated. Technical Solutions

[0005] To solve the above technical problems, the present invention is implemented as follows: a liquid-cooled battery includes a battery cell, a dynamic regulating valve and a liquid cooling plate, the liquid cooling plate is connected to the battery cell, an elastic membrane is provided in the dynamic regulating valve to separate the internal space of the dynamic regulating valve into a temperature sensing chamber and a liquid storage chamber, the cavity wall of the liquid storage chamber is provided with a liquid inlet and a liquid outlet, the liquid inlet is used to introduce coolant into the liquid storage chamber, the liquid outlet connects the liquid storage chamber and the internal space of the liquid cooling plate, an inert gas is placed in the temperature sensing chamber and contacts the outer surface of the battery cell, the inert gas changes volume at a preset temperature, and the elastic membrane has a movement direction toward the temperature sensing chamber or the liquid storage chamber.

[0006] In some embodiments of the present invention, a partition is provided in the liquid storage chamber, and the two ends of the partition are connected to two opposite cavity walls different from the elastic membrane. The partition divides the liquid storage chamber into a liquid inlet chamber and a liquid outlet chamber. The side of the partition close to the elastic membrane is the liquid inlet chamber, and the side of the partition away from the elastic membrane is the liquid outlet chamber. The liquid inlet is connected to the liquid inlet chamber, and the liquid outlet is connected to the liquid outlet chamber. The partition is penetrated by a through hole connecting the liquid inlet chamber and the liquid outlet chamber.

[0007] In some embodiments of the present invention, the liquid-cooled battery includes a push rod assembly, which includes a push rod and a plug connected to one end of the push rod, the end of the push rod away from the plug is connected to the elastic membrane, the push rod passes through the through hole, and the plug and the through hole are combined to form a flow channel, and the plug has a movement direction close to or away from the through hole to shrink or expand the flow channel.

[0008] In some embodiments of the present invention, the diameter of the port of the through hole connecting to the liquid inlet cavity is smaller than the diameter of the port connecting to the liquid outlet cavity, the plug is arranged to fit the shape of the through hole, and the plug has a movement trajectory from the through hole to the liquid outlet cavity.

[0009] In some embodiments of the present invention, a reset member is installed at one end of the plug away from the push rod, and the other end of the reset member is installed on the wall of the liquid storage cavity away from the plug, and the reset member is used to drive the plug into the through hole.

[0010] In some embodiments of the present invention, the elastic membrane includes a first membrane body and a second membrane body arranged at intervals, the first membrane body is close to the temperature sensing cavity, the second membrane body is close to the liquid storage cavity, and the first membrane body and the second membrane body enclose an air cavity.

[0011] In some embodiments of the present invention, a partition portion connected to the inner wall surface is provided in the dynamic regulating valve, and the partition portion is spaced apart on the side of the elastic membrane close to the temperature sensing cavity. The partition portion and the first membrane body are combined to form a placement cavity, and the side of the partition portion away from the placement cavity is combined with the inner wall surface of the dynamic regulating valve to form the temperature sensing cavity. The partition portion and the first membrane body are penetrated by two through-holes, and a capillary is provided in the placement cavity. The two ends of the capillary are respectively connected to the two through-holes, and the capillary connects the temperature sensing cavity and the air cavity.

[0012] In some embodiments of the present invention, the air cavity is filled with the inert gas.

[0013] In some embodiments of the present invention, the liquid cooling plate is connected to one side of the dynamic regulating valve, and the height of the connecting position of the liquid cooling plate and the dynamic regulating valve is lower than the height of the elastic membrane.

[0014] The present invention also proposes a dynamic distribution system for liquid-cooled batteries, including a base and multiple liquid-cooled batteries as described above, multiple liquid cooling plates in the multiple liquid-cooled batteries are arranged at intervals and installed on the same base plane, a dynamic regulating valve and a battery cell are correspondingly connected to a corresponding liquid cooling plate, the multiple battery cells maintain electrical connection, and the multiple dynamic regulating valves are independently set. Beneficial effects

[0015] Compared with the prior art, the liquid-cooled battery and its dynamic distribution system in the present invention have the following beneficial effects:

[0016] The present invention proposes a liquid-cooled battery and a dynamic distribution system thereof. The liquid-cooled battery includes a battery cell, a dynamic regulating valve and a liquid cooling plate. The liquid cooling plate is connected to the battery cell. An elastic membrane is provided in the dynamic regulating valve to separate the internal space of the dynamic regulating valve into a temperature sensing chamber and a liquid storage chamber. A liquid inlet and a liquid outlet are provided on the wall of the liquid storage chamber. The liquid inlet is used to introduce coolant into the liquid storage chamber. The liquid outlet connects the liquid storage chamber and the internal space of the liquid cooling plate. Inert gas is placed in the temperature sensing chamber and contacts the outer surface of the battery cell. The inert gas changes volume at a preset temperature. The elastic membrane has a movement direction toward the temperature sensing chamber or the liquid storage chamber. When the battery cell temperature rises, the volume of the inert gas increases, pushing the elastic membrane to squeeze the liquid reservoir, resulting in an increase in the flow of coolant from the reservoir into the liquid cold plate, which improves the cooling effect of the liquid cold plate on the battery cell. When the battery cell temperature drops, the volume of the inert gas returns to its initial volume, the elastic membrane rebounds to its initial position, and the flow of coolant from the reservoir into the liquid cold plate returns to its normal rate. This allows the dynamic control valve to regulate the battery cell temperature in real time, and the inert gas improves the accuracy of the dynamic control valve. The dynamic distribution system for liquid-cooled batteries includes a base and multiple liquid-cooled batteries. The multiple liquid cold plates are arranged at intervals and mounted on the same base plane. A dynamic control valve is connected to each battery cell and a corresponding liquid cold plate. The multiple battery cells maintain electrical connection, and the multiple dynamic control valves are independently configured. Each dynamic control valve controls the temperature of the corresponding battery cell, so that the temperature change of a single battery cell does not affect the temperature change of other battery cells, thereby reducing the temperature difference between multiple battery cells and improving the safety and temperature stability of the liquid-cooled battery. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] FIG1 is a schematic side view of the structure of a liquid-cooled battery in one embodiment of the present invention;

[0018] FIG2 is a side structural diagram of the dynamic regulating valve of the liquid-cooled battery in FIG1 ;

[0019] FIG3 is a schematic structural diagram of a dynamic allocation system for liquid-cooled batteries according to an embodiment of the present invention;

[0020] FIG4 is a schematic structural diagram of multiple dynamic regulating valves and pipelines of the dynamic distribution system of the liquid-cooled battery in FIG3 .

[0021] In the accompanying drawings, each reference numeral represents:

[0022] 100. Liquid-cooled battery; 10. Battery cell; 11. Dynamic regulating valve; 111. Elastic membrane; 1111. First membrane body; 1112. Second membrane body; 1113. Air cavity; 112. Temperature sensing cavity; 113. Liquid storage cavity; 1131. Liquid inlet; 1132. Liquid outlet; 1133. Partition; 1134. Liquid inlet cavity; 1135. Liquid outlet cavity; 1136. Through hole; 114. Push rod assembly; 1141. Push rod; 1142. Plug; 1143. Reset member; 1144. Flow channel; 115. Partition; 1151. Placement cavity; 1152. Capillary; 12. Liquid cooling plate; 200. Base. Modes for Carrying Out the Invention

[0023] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0024] The following describes in detail embodiments of the present invention, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present invention, and are not to be construed as limiting the present invention. All other embodiments obtained by persons of ordinary skill in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0025] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "circumferential", "radial", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore cannot be understood as limiting the present invention.

[0026] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature identified as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, "plurality" means two or more, unless otherwise specifically defined.

[0027] 1 to 4 , the present invention provides a liquid-cooled battery 100, characterized in that it includes a battery cell 10, a dynamic regulating valve 11, and a liquid cooling plate 12. The liquid cooling plate 12 is connected to the battery cell 10. An elastic membrane 111 is provided in the dynamic regulating valve 11 to separate the internal space into a temperature sensing chamber 112 and a liquid storage chamber 113. The wall of the liquid storage chamber 113 is provided with a liquid inlet 1131 and a liquid outlet 1132. The liquid inlet 1131 is used to introduce coolant into the liquid storage chamber 113. The liquid outlet 1132 connects the liquid storage chamber 113 and the internal space of the liquid cooling plate 12. An inert gas is placed in the temperature sensing chamber 112 and contacts the outer surface of the battery cell 10. The inert gas changes volume at a preset temperature. The elastic membrane 111 has a movement direction toward the temperature sensing chamber 112 or the liquid storage chamber 113.

[0028] The present invention also proposes a dynamic distribution system for a liquid-cooled battery 100, a base 200 and a liquid-cooled battery 100, multiple liquid cooling plates 12 are arranged at intervals and installed on the same plane of the base 200, a dynamic regulating valve 11 and a battery cell 10 are correspondingly connected to a liquid cooling plate 12, multiple battery cells 10 maintain electrical connection, and multiple dynamic regulating valves 11 are independently set.

[0029] At room temperature and pressure, inert gases are colorless, odorless, and monatomic gases that are difficult to react chemically. They also have the characteristic of changing volume with temperature. According to the ideal gas state equation pV=nRT, where p is pressure, V is volume, n is the amount of gas, R is the molar gas constant, and T is temperature, the equation states that if the amount of gas n and the molar gas constant R remain unchanged, when the temperature T of the inert gas in the space increases, if the volume V of the gas remains unchanged, then the pressure p in the space increases. If the pressure p in the space remains unchanged, then the volume V of the gas increases.

[0030] Inferring the internal space of the dynamic regulating valve 11 in the present invention, the dynamic regulating valve 11 has an outer shell, that is, the internal volume remains unchanged. The internal space of the outer shell is divided into a temperature sensing chamber 112 and a liquid storage chamber 113 by providing an elastic membrane 111. The elastic membrane 111 changes its bending direction as the pressure changes, thereby changing the volume ratio of the temperature sensing chamber 112 and the liquid storage chamber 113. In this embodiment, the temperature sensing chamber 112 containing the inert gas is connected to the battery cell 10. During use, the battery cell 10 is based on Ohm's law. Ohm's law is a law that describes the relationship between current, voltage, and resistance. According to Ohm's law, when current flows through a resistor, the resistor converts electrical energy into heat energy, thereby causing the resistor to heat up. Therefore, when current flows through the battery cell 10, the resistor inside the battery cell 10 converts electrical energy into heat energy, thereby causing the battery cell 10 to heat up. The outer shell of the battery cell 10 and the outer shell of the dynamic regulating valve 11 can both be made of metal or other materials with high thermal conductivity. Since one side of the temperature sensing cavity 112 is an elastic membrane 111 that can expand outward, the volume of the temperature sensing cavity 112 is variable. The heat generated by the battery cell 10 during operation is transferred through the outer shell to the temperature sensing cavity 112, which is filled with an inert gas. The inert gas is heated, causing the pressure p within the temperature sensing cavity 112 to increase. To maintain pressure balance inside and outside the temperature sensing cavity 112, the elastic membrane 111 expands outward, increasing the volume of the temperature sensing cavity 112, thereby increasing the volume of the gas and maintaining system equilibrium. By setting a specific volume of inert gas based on the relationship between the rate of change of the inert gas volume and the rate of change of temperature, a temperature sensing effect at a specific temperature can be achieved.

[0031] Furthermore, the elastic membrane 111 expands toward the liquid storage chamber 113, squeezing the space within the liquid storage chamber 113 and reducing the volume within the liquid storage chamber 113. The coolant within the liquid storage chamber 113 is squeezed and flows out of the liquid outlet 1132, increasing the coolant content within the liquid cooling plate 12 and lowering the temperature of the liquid cooling plate 12. The liquid cooling plate 12 contacts the battery cells 10, cooling the battery cells 10. In the dynamic distribution system of the liquid-cooled battery 100, each battery cell 10 corresponds to a dynamic regulating valve 11. The temperature rise of a single battery cell 10 can be regulated by a single dynamic regulating valve 11, thereby achieving precise regulation of a single battery cell 10 among multiple battery cells 10. By independently regulating the cooling flow of each battery cell 10, the temperature difference between the battery cells 10 is reduced to within 1°C, thereby improving battery life.

[0032] In this embodiment, referring to Figures 3 and 4, for the dynamic distribution system of the liquid-cooled battery 100, multiple liquid cooling plates 12 are arranged on the same plane of the base 200. The multiple liquid cooling plates 12 are arranged in rows and columns, and multiple mounting positions for mounting the liquid-cooled battery 100 are provided on the base 200. The dynamic regulating valve 11 is connected to different coolant pipes. The coolant pipes are used to input coolant. After the coolant absorbs heat, it flows out from the outlet of the base 200 to realize circulation. The coolant pipes can be connected to a compressor for re-compressing the liquefied coolant.

[0033] When the elastic membrane 111 within the dynamic control valve 11 deforms due to the rising temperature of the battery cell 10, it squeezes the liquid reservoir 113. After the coolant in the liquid reservoir 113 enters the liquid cooling plate 12, the temperature of the battery cell 10 decreases, and the elastic membrane 111 returns to its initial state. The space in the liquid reservoir 113 returns to its original volume, and the coolant flowing out of the liquid reservoir 113 is replenished through the coolant pipe at the liquid inlet 1131. Therefore, the elastic membrane 111 functions to increase the flow rate of the liquid within the liquid reservoir 113. When the temperature rises, it squeezes the liquid reservoir 113, increasing the instantaneous flow rate of coolant entering the liquid cooling plate 12 and removing heat from the battery cell 10. When the temperature stabilizes, the temperature of the battery cell 10 remains unchanged, and the coolant enters the liquid reservoir 113 from the liquid inlet 1131 and flows out from the liquid outlet 1132 at a steady rate. This configuration method helps improve the accuracy and consistency of temperature control of the battery cell 10 without affecting other battery cells 10 or the dynamic control valve 11.

[0034] In this embodiment, a partition 1133 is provided in the liquid storage chamber 113, and the two ends of the partition 1133 are connected to two opposite cavity walls different from the elastic membrane 111. The partition 1133 divides the liquid storage chamber 113 into a liquid inlet chamber 1134 and a liquid outlet chamber 1135. The side of the partition 1133 close to the elastic membrane 111 is the liquid inlet chamber 1134, and the side of the partition 1133 away from the elastic membrane 111 is the liquid outlet chamber 1135. The liquid inlet 1131 is connected to the liquid inlet chamber 1134, and the liquid outlet 1132 is connected to the liquid outlet chamber 1135. The partition 1133 is penetrated by a through hole 1136 connecting the liquid inlet chamber 1134 and the liquid outlet chamber 1135. The partition 1133 is arranged along the peripheral wall of the dynamic regulating valve 11 and has the same size as the cross-sectional area of ​​the dynamic regulating valve 11. The cross-section of the dynamic regulating valve 11 can be rectangular, triangular, circular, etc. The planar shape of the partition 1133 can be the same as the cross-sectional shape of the dynamic regulating valve 11. The through hole 1136 is set through both sides, and the cooling liquid can flow from the liquid inlet chamber 1134 to the liquid outlet chamber 1135.

[0035] To regulate the flow of coolant out of liquid outlet 1132, a partition 1133 is provided to initially store the coolant flowing in from liquid inlet 1131 in liquid inlet chamber 1134. The diameter of through-hole 1136 is then adjusted to control the flow of coolant from inlet chamber 1134 into outlet chamber 1135. This arrangement effectively and precisely adjusts the amount of coolant entering the liquid cooling plate 12. As the temperature of the battery cell 10 rises, the volume of the inert gas within the temperature-sensing chamber 112 increases, and the elastic membrane 111 squeezes the volume of liquid inlet chamber 1134, increasing the amount of coolant flowing through through-hole 1136. This increases the amount of coolant entering the liquid cooling plate 12 and cools the battery cell 10.

[0036] Further, please refer to Figure 2, the liquid-cooled battery 100 includes a push rod 1141 assembly 114, the push rod 1141 assembly 114 includes a push rod 1141 and a plug 1142 connected to one end of the push rod 1141, the end of the push rod 1141 away from the plug 1142 is connected to the elastic membrane 111, the push rod 1141 passes through the through hole 1136, the plug 1142 and the through hole 1136 are enclosed to form a flow channel 1144, the plug 1142 has a movement direction close to or away from the through hole 1136 to narrow or expand the flow channel 1144. By setting the size of the plug 1142 and the through hole 1136, the size of the flow channel 1144 can be set to regulate the flow of coolant entering the liquid cooling plate 12. When the elastic membrane 111 is in the initial position, the length of the push rod 1141 is fixed, the plug 1142 is located in the through hole 1136, and the inner wall of the through hole 1136 and the outer wall of the plug 1142 are enclosed to form the flow channel 1144. The coolant enters the liquid inlet cavity 1134 from the liquid inlet 1131, passes through the flow channel 1144 to the liquid outlet cavity 1135, and then flows out from the liquid outlet 1131. 132 flows into the liquid cooling plate 12. When the temperature of the battery cell 10 increases, the volume of the inert gas in the temperature sensing chamber 112 increases, squeezing the elastic membrane 111. The elastic membrane 111 bulges and bends toward the partition 1133. The push rod 1141 moves with the deformation of the elastic membrane 111, driving the plug 1142 away from the through hole 1136. The cross-sectional area of ​​the flow channel 1144 formed between the plug 1142 and the through hole 1136 increases until the plug 1142 is completely separated from the through hole 1136, thereby achieving the maximum coolant flow rate.

[0037] By setting up the form of the push rod 1141 assembly 114, the precise control of the coolant flow rate is further enhanced. The push rod 1141 connected to the elastic membrane 111 makes the kinetic energy transmission between the two more precise and reduces the kinetic energy consumption. The connection method of the push rod 1141, the elastic membrane 111 and the plug 1142 can be bonding, screw locking, one-piece molding, etc. The push rod 1141 passes through the through hole 1136, and the plug 1142 is arranged in the liquid outlet cavity 1135. The plug 1142 enters the liquid outlet cavity 1135 from the through hole 1136 through the push of the push rod 1141, thereby expanding the width of the flow channel 1144.

[0038] Specifically, the diameter of the port of the through hole 1136 connecting to the liquid inlet chamber 1134 is smaller than the diameter of the port connecting to the liquid outlet chamber 1135. The plug 1142 is arranged to fit the shape of the through hole 1136, and the plug 1142 has a movement trajectory from the through hole 1136 to the liquid outlet chamber 1135. The two ports of the through hole 1136 have different diameters, and the internal cross-section of the through hole 1136 can be trapezoidal. The push rod 1141 passes through the through hole 1136, and the plug 1142 is arranged on the side of the port close to the through hole 1136 connecting to the liquid outlet chamber 1135. The shape of the plug 1142 is the same as that of the through hole 1136, that is, the area of ​​the end of the plug 1142 close to the liquid outlet chamber 1135 is larger than the area of ​​the end close to the liquid inlet chamber 1134. When the temperature of the battery cell 10 rises and the elastic membrane 111 bulges and deforms, the plug 1142 can move toward the direction of entering the liquid outlet chamber 1135, and the flow channel 114 4 is expanded, increasing the flow rate of the coolant. When the temperature of the battery cell 10 returns to normal, the elastic membrane 111 returns to its initial state, the plug 1142 can move toward the direction of entering the through-hole 1136, and the flow channel 1144 shrinks. Since the two ends of the plug 1142 have different areas, the end of the plug 1142 closer to the liquid outlet cavity 1135 cannot escape from the end of the through-hole 1136 closer to the liquid inlet cavity 1134, effectively preventing the plug 1142 from escaping from the through-hole 1136 and losing its function, thereby improving the reliability of the push rod 1141 assembly 114 and the stability of regulating the coolant flow.

[0039] Referring to Figure 2 , in this embodiment, a return member 1143 is mounted on the end of the plug 1142 away from the push rod 1141. The end of the return member 1143 away from the plug 1142 is mounted on the wall of the liquid storage chamber 113. The return member 1143 is used to drive the plug 1142 into the through hole 1136. The return member 1143 can be a spring or other elastic member with a rebound effect. When the elastic membrane 111 rebounds to its initial position, the return member 1143 facilitates the entry of the plug 1142 into the through hole 1136 and the movement of the plug 1142 to its initial position. The plug 1142 is subjected to the traction force of the push rod 1141 and the upward elastic force of the reset member 1143. When the plug 1142 forms a flow channel 1144 of an initial size in the through hole 1136, the traction force of the push rod 1141 is equal to the elastic force of the reset member 1143; when the gas volume in the temperature sensing chamber 112 increases to the point where the pressure of the elastic membrane 111 on the push rod 1141 is greater than the elastic force of the reset member 1143, the reset member 1143 is compressed, and the plug 1142 moves in the direction away from the through hole 1136; when the gas volume in the temperature sensing chamber 112 decreases and the pressure of the elastic membrane 111 on the push rod 1141 is less than the elastic force of the reset member 1143, the reset member 1143 has a rebound tendency, driving the plug 1142 to move in the direction close to the through hole 1136 until the plug 1142 returns to its initial position.

[0040] As the temperature of the battery cell 10 changes, the volume of the inert gas within the temperature-sensing chamber 112 also changes accordingly, thereby controlling the different pulling forces exerted by the elastic membrane 111 on the push rod 1141. The relationship between this pulling force and the rebound force of the reset member 1143 influences the specific position of the plug 1142. The distance between the plug 1142 and the through-hole 1136 influences the size of the flow channel 1144. Thus, the changes in the elastic membrane 111 influence the flow rate of the coolant, thereby reducing the temperature of the battery cell 10. Simultaneously, the decrease in the temperature of the battery cell 10 reduces the pulling force exerted by the elastic membrane 111 on the push rod 1141, causing the plug 1142 to move toward the through-hole 1136, reducing the coolant flow rate until the coolant reaches the initial flow rate.

[0041] To achieve a more precise effect of the inert gas in the temperature-sensing chamber 112 on the elastic membrane 111, in this embodiment, the elastic membrane 111 includes a first membrane body 1111 and a second membrane body 1112 arranged in an alternating pattern. The first membrane body 1111 is located near the temperature-sensing chamber 112, while the second membrane body 1112 is located near the liquid storage chamber 113. The first and second membrane bodies 1111, 1112 together form an air cavity 1113. The volume change of the inert gas in the temperature-sensing chamber 112 affects the deformation of the first membrane body 1111, and the deformation of the first membrane body 1111 affects the volume change of the air cavity 1113. To balance the volume of the air cavity 1113, the second membrane body 1112 deforms in the same direction as the deformation of the first membrane body 1111. Through multiple layers of gas flow control, the squeezing effect within liquid storage chamber 113 is precisely adjusted. The flow rate of the coolant within liquid storage chamber 113 also changes with the changes in second membrane 1112. As the temperature rises, the volume of the inert gas increases, pushing first membrane 1111 to bend toward air chamber 1113. The movement of the gas within air chamber 1113 drives the movement of second membrane 1112, squeezing liquid storage chamber 113. Simultaneously, second membrane 1112 can be connected to push rod 1141 assembly 114, which is used to adjust the size of flow channel 1144 between plug 1142 and through-hole 1136, improving the movement accuracy of plug 1142. The size of flow channel 1144 can be adjusted based on the real-time temperature changes of battery cell 10, thereby enhancing the accuracy of dynamic control valve 11.

[0042] Furthermore, a partition portion 115 connected to the inner wall surface is provided in the dynamic regulating valve 11. The partition portion 115 is spaced apart on the side of the elastic membrane 111 close to the temperature sensing cavity 112. The partition portion 115 and the first membrane body 1111 enclose a placement cavity 1151. The side of the partition portion 115 away from the placement cavity 1151 and the inner wall surface of the dynamic regulating valve 11 enclose a temperature sensing cavity 112. The partition portion 115 and the first membrane body 1111 are penetrated by two through-holes. A capillary 1152 is provided in the placement cavity 1151. The two ends of the capillary 1152 are respectively connected to the two through-holes. The capillary 1152 communicates with the temperature sensing cavity 112 and the air cavity 1113. The inner diameter of the capillary 1152 is small, and even slight pressure changes can be transmitted to the air cavity 1113 of the elastic membrane 111. The gas in the air cavity 1113 is subjected to the pressure transmitted by the capillary 1152, so the first membrane body 1111 can be set as a non-elastic membrane, that is, the first membrane body 1111 cannot be deformed, and the cavity wall of the temperature sensing cavity 112 cannot be deformed. When the temperature of the battery cell 10 increases, the volume of the inert gas in the temperature sensing cavity 112 increases, and the inert gas is transmitted into the air cavity 1113 of the elastic membrane 111 through the capillary 1152. The air cavity 1113 is filled with inert gas, and the volume of the inert gas gradually increases, then the deformable second membrane body 1112 bends toward the liquid storage cavity 113. In this way, the push rod 1141 and the plug 1142 can be pulled, the size of the flow channel 1144 can be adjusted, and the accuracy and airtightness of the dynamic control valve 11 are improved.

[0043] The liquid cooling plate 12 is connected to one side of the dynamic control valve 11, and the level of the connection between the liquid cooling plate 12 and the dynamic control valve 11 is lower than the level of the elastic membrane 111. This arrangement prevents the lower temperature of the liquid cooling plate 12 from affecting the inert gas in the air cavity 1113 and the temperature sensing cavity 112. The inert gas in these chambers does not change in volume due to the temperature drop caused by the increase in coolant in the liquid cooling plate 12, thereby improving the precision and accuracy of the dynamic control valve 11.

[0044] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A liquid-cooled battery, characterized in that: It includes a battery cell, a dynamic regulating valve and a liquid cooling plate, the liquid cooling plate is connected to the battery cell, an elastic membrane is provided in the dynamic regulating valve to separate the internal space of the dynamic regulating valve into a temperature sensing chamber and a liquid storage chamber, the cavity wall of the liquid storage chamber is provided with a liquid inlet and a liquid outlet, the liquid inlet is used to introduce cooling liquid into the liquid storage chamber, the liquid outlet connects the liquid storage chamber and the internal space of the liquid cooling plate, an inert gas is placed in the temperature sensing chamber and contacts the outer surface of the battery cell, the inert gas changes volume at a preset temperature, and the elastic membrane has a movement direction toward the temperature sensing chamber or the liquid storage chamber.

2. The liquid-cooled battery according to claim 1, characterized in that: A partition is provided in the liquid storage cavity, and two ends of the partition are connected to two opposite cavity walls different from the elastic membrane. The partition divides the liquid storage cavity into a liquid inlet cavity and a liquid outlet cavity. The side of the partition close to the elastic membrane is the liquid inlet cavity, and the side of the partition away from the elastic membrane is the liquid outlet cavity. The liquid inlet is connected to the liquid inlet cavity, and the liquid outlet is connected to the liquid outlet cavity. A through hole is penetrated through the partition to connect the liquid inlet cavity and the liquid outlet cavity.

3. The liquid-cooled battery according to claim 2, characterized in that: The liquid-cooled battery includes a push rod assembly, which includes a push rod and a plug connected to one end of the push rod, the end of the push rod away from the plug is connected to the elastic membrane, the push rod passes through the through hole, the plug and the through hole form a flow channel, and the plug has a movement direction approaching or away from the through hole to shrink or expand the flow channel.

4. The liquid-cooled battery according to claim 3, characterized in that: The diameter of the port of the through hole connected to the liquid inlet cavity is smaller than the diameter of the port connected to the liquid outlet cavity. The plug is arranged to fit the shape of the through hole, and the plug has a movement trajectory from the through hole to the liquid outlet cavity.

5. The liquid-cooled battery according to claim 3 or 4, characterized in that: A reset member is installed at one end of the plug away from the push rod, and one end of the reset member away from the plug is installed on the cavity wall of the liquid storage cavity. The reset member is used to drive the plug to enter the through hole.

6. The liquid-cooled battery according to claim 1, characterized in that: The elastic membrane comprises a first membrane body and a second membrane body which are arranged at intervals, wherein the first membrane body is close to the temperature sensing cavity, and the second membrane body is close to the liquid storage cavity, and the first membrane body and the second membrane body enclose an air cavity.

7. The liquid-cooled battery according to claim 6, characterized in that: The dynamic regulating valve is provided with a partition portion connected to the inner wall surface, the partition portion is spaced apart at a side of the elastic membrane close to the temperature sensing cavity, the partition portion and the first membrane body are combined to form a placement cavity, and the side of the partition portion away from the placement cavity is combined with the inner wall surface of the dynamic regulating valve to form the temperature sensing cavity, the partition portion and the first membrane body are penetrated by two through holes, a capillary is provided in the placement cavity, two ends of the capillary are respectively connected to the two through holes, and the capillary connects the temperature sensing cavity and the air cavity.

8. The liquid-cooled battery according to claim 6 or 7, characterized in that: The air cavity is filled with the inert gas.

9. The liquid-cooled battery according to claim 1, characterized in that: The liquid cooling plate is connected to one side of the dynamic regulating valve, and the level of the connecting position between the liquid cooling plate and the dynamic regulating valve is lower than the level of the elastic membrane.

10. A dynamic allocation system for liquid-cooled batteries, characterized in that: It comprises a base and a plurality of liquid-cooled batteries as described in any one of claims 1 to 9, wherein a plurality of liquid-cooled plates in the plurality of liquid-cooled batteries are arranged at intervals and installed on the same plane of the base, a dynamic regulating valve and a battery cell are correspondingly connected to a corresponding liquid-cooling plate, an electrical connection is maintained between the plurality of battery cells, and a plurality of dynamic regulating valves are independently arranged.

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