Electrolyte heat exchange device and electrolyte injection device

Abstract

The utility model relates to the technical field of battery manufacturing, and provides an electrolyte heat exchange device and an electrolyte injection device, and the heat exchange device comprises a first container used for containing an electrolyte; the second container is arranged on the periphery of the first container in a sleeving mode, and the second container and the first container are arranged in a spaced mode to form a cavity used for containing a heat exchange medium; and the heat exchange mechanism comprises a heating assembly, the heating assembly is used for heating a heat exchange medium, and the heat exchange mechanism is connected with the second container and used for driving the heat exchange medium to flow between the cavity and the heating assembly. According to the technical scheme, the current situation that the efficiency of injecting the electrolyte into the battery at present cannot meet the current demand can be improved.

Description

Technical Field

[0001] The present application relates to the technical field of battery manufacturing, and in particular to a heat exchange device and a liquid injection device for an electrolyte. Background Art

[0002] Lithium batteries are a type of battery that uses lithium metal or lithium alloy as the positive and negative electrodes and uses non-aqueous electrolyte solutions. With the development of microelectronics technology in the 20th century, the number of miniaturized devices has increased, which has put forward high requirements for power sources. Lithium batteries have entered a large-scale practical stage. Lithium-ion batteries are widely used in various mobile terminals, such as: mobile phones, laptops, power tools, electric vehicles, street lamp backup power supplies, navigation lights, small household appliances, etc.

[0003] During the production process of lithium batteries, the storage temperature of lithium battery electrolyte is generally lower than room temperature. The viscosity of the electrolyte is negatively correlated with the increase of temperature, and the viscosity of the electrolyte determines its injection efficiency into the lithium battery container.

[0004] At present, with the increasing requirements for lithium battery capacity and the increase in output requirements in the lithium battery manufacturing industry, the electrolyte injection efficiency can no longer meet current needs. Utility Model Content

[0005] The technical problem to be solved by the present application is to provide an electrolyte heat exchange device to improve the current situation where the efficiency of electrolyte injection into the battery cannot meet the current needs.

[0006] In order to solve the above technical problems, this application adopts the following technical solutions:

[0007] In a first aspect, the present application provides an electrolyte heat exchange device, comprising: a first container for containing electrolyte; a second container, which is sleeved on the outer circumference of the first container and is spaced apart from the first container to form a chamber for containing a heat exchange medium; a heat exchange mechanism, comprising a heating component, the heating component is used to heat the heat exchange medium, the heat exchange mechanism is connected to the second container, and is used to drive the heat exchange medium to flow between the chamber and the heating component.

[0008] In the technical solution of the present application, a first container is used to hold an electrolyte, a second container is sleeved on the outer periphery of the first container, and the second container is spaced apart from the first container to form a chamber for holding a heat exchange medium. The heat exchange mechanism includes a heating component, and the heating component can heat the heat exchange medium. At the same time, the heat exchange mechanism can make the heat exchange medium flow between the heating component and the chamber. In this way, the heat exchange medium in the chamber will perform heat exchange with the electrolyte in the first container, thereby increasing the temperature of the electrolyte and reducing the viscosity of the electrolyte, so as to improve the injection efficiency of the electrolyte and meet the current injection requirements of the electrolyte.

[0009] In some embodiments, the heating component includes a third container for storing heat exchange medium; the heat exchange mechanism also includes a driving member and a first connecting pipe, the driving member is installed on the first connecting pipe, and the two ends of the first connecting pipe are respectively connected to the second container and the third container.

[0010] The third container is used to hold the heat exchange medium. The third container and the second container are connected by the first connecting pipe, so that the heat exchange medium can flow in the third container and between the chambers; the heat exchange medium is driven to flow by the driving member, thereby improving the flow efficiency of the heat exchange medium and further improving the heat exchange efficiency of the heat exchange medium to the electrolyte.

[0011] In some embodiments, the heat exchange mechanism further includes at least one first solenoid valve, and the first solenoid valve is installed on the first connecting pipe.

[0012] By arranging the first electromagnetic valve in the first connecting pipe, the first electromagnetic valve can open or close the flow state of the first connecting pipe, thereby allowing the heat exchange medium to flow into the chamber or stop flowing into the chamber.

[0013] In some embodiments, the heating assembly further comprises a heating element extending into the third container.

[0014] By arranging a heating element in the third container, the heating element can heat the heat exchange medium, thereby meeting the heat exchange demand between the heat exchange medium and the electrolyte.

[0015] In some embodiments, the heat exchange mechanism further includes at least one stirring element, and the stirring element extends into the third container.

[0016] By arranging a stirring element in the third container, the stirring element stirs the heat exchange medium, so that the heat exchange medium in the third container is heated evenly.

[0017] In some embodiments, the heat exchange mechanism further includes a first temperature sensor, and the first temperature sensor is disposed in the third container.

[0018] By arranging the first temperature sensor in the third container, the first temperature sensor can detect the temperature of the heat exchange medium in the third container, and cooperate with the heating element to heat the heat exchange medium to the required heat exchange temperature.

[0019] In some embodiments, the heat exchange mechanism further includes a second connecting pipe, and the second connecting pipe is connected to the second container and the third container respectively.

[0020] By providing a second connecting pipe, and connecting both ends of the second connecting pipe to the second container and the third container respectively, the heat exchange medium can flow back to the third container through the second connecting pipe after heat exchange with the electrolyte, thereby realizing the circulation of the heat exchange medium.

[0021] In some embodiments, the position where the second connecting tube is connected to the second container is lower than the position where the first connecting tube is connected to the second container; the position where the second connecting tube is connected to the third container is higher than the position where the first connecting tube is connected to the third container.

[0022] The position where the second connecting pipe is connected to the second container is lower than the position where the first connecting pipe is connected to the second container, which facilitates the heat exchange medium to be driven from the chamber to the third container; the position where the second connecting pipe is connected to the third container is higher than the position where the first connecting pipe is connected to the third container, which facilitates the heat exchange medium to flow from the third container into the chamber.

[0023] In some embodiments, the heat exchange mechanism further includes at least one second solenoid valve, and the second solenoid valve is installed on the second connecting pipe.

[0024] By installing the second solenoid valve on the second connecting pipe, the second solenoid valve can open or close the flow state of the second connecting pipe, so that the heat exchange medium flows from the chamber into the third container or stops flowing into the third container.

[0025] In some embodiments, the heat exchange device further includes a positive pressure pipeline, which is connected to the second container and is used to transport a pressurized medium into the chamber.

[0026] By setting up a positive pressure pipeline, the positive pressure pipeline can transport a pressurized medium, thereby pressurizing and discharging the heat exchange medium in the chamber, and the heat exchange medium flows into the third container through the second connecting pipe, thereby improving the flow efficiency of the heat exchange medium.

[0027] In some embodiments, the heat exchange device further includes a third solenoid valve, and the third solenoid valve is disposed on the positive pressure pipeline.

[0028] By arranging a third solenoid valve on the positive pressure pipeline, the third solenoid valve is used to control the opening or closing of the positive pressure pipeline.

[0029] In some embodiments, the heat exchange device further includes a pressure relief valve, which is in communication with the chamber.

[0030] By setting a pressure relief valve, when the pressurized medium enters the chamber to discharge the heat exchange medium, the pressure in the chamber will increase. The pressure relief valve can maintain the balance of internal and external pressures of the chamber. In addition, it is also convenient for the heat exchange medium in the third container to flow into the chamber, and the flow efficiency of the heat exchange medium flowing into the third container is also improved.

[0031] In some embodiments, a second temperature sensor is disposed within the chamber.

[0032] By arranging the second temperature sensor in the chamber, the second temperature sensor can detect the temperature of the heat exchange medium in the chamber.

[0033] In some embodiments, the heat exchange device further includes a heat-insulating component, and the heat-insulating component is disposed on the outer surface of the second container.

[0034] By arranging a heat-insulating member on the outer surface of the second container, the second container can be kept warm, the heat loss of the second container can be reduced, and thus the heat loss of the heat exchange medium can be reduced, thereby improving the heat exchange efficiency.

[0035] In a second aspect, the present application provides a liquid injection device, comprising the electrolyte heat exchange device provided in the first aspect. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments of the present application will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without paying creative work.

[0037] Figure 1 A schematic diagram of the structure of a heat exchange device provided in an embodiment of the present application.

[0038] Icon: 1-first container; 16-cover plate; 17-bottom plate; 2-second container; 3-chamber; 4-heating assembly; 41-heating element; 42-third container; 5-first connecting pipe; 6-first solenoid valve; 7-driving element; 8-first temperature sensor; 9-second connecting pipe; 10-second solenoid valve; 11-positive pressure pipeline; 12-third solenoid valve; 13-pressure relief valve; 14-second temperature sensor; 15-stirring element. DETAILED DESCRIPTION

[0039] The technical solutions in the embodiments of the present application will be described below in conjunction with the drawings in the embodiments of the present application.

[0040] The following embodiments are only used to more clearly illustrate the technical solution of the present application, and are therefore only used as examples, and cannot be used to limit the scope of protection of the present application.

[0041] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by technicians in the technical field to which this application belongs; the terms used herein are only for the purpose of describing specific embodiments and are not intended to limit this application; the terms "including" and "having" in the specification and claims of this application and the above-mentioned figure descriptions and any variations thereof are intended to cover non-exclusive inclusions.

[0042] In the description of the embodiments of the present application, the technical terms "first", "second", etc. are only used to distinguish different objects, and cannot be understood as indicating or implying relative importance or implicitly indicating the number, specific order or primary and secondary relationship of the indicated technical features. In the description of the embodiments of the present application, the meaning of "multiple" is more than two, unless otherwise clearly and specifically defined.

[0043] Reference to "embodiments" herein means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present application. The appearance of the phrase in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0044] In the description of the embodiments of the present application, the term "and / or" is only a description of the association relationship of the associated objects, indicating that there may be three relationships. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in this article generally indicates that the associated objects before and after are in an "or" relationship.

[0045] In the description of the embodiments of the present application, the term "multiple" refers to more than two (including two). Similarly, "multiple groups" refers to more than two groups (including two groups), and "multiple pieces" refers to more than two pieces (including two pieces).

[0046] In the description of the embodiments of the present application, the technical terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, which are only for the convenience of describing the embodiments of the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the embodiments of the present application.

[0047] In the description of the embodiments of the present application, unless otherwise clearly specified and limited, technical terms such as "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, and it can be the internal connection of two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the embodiments of the present application can be understood according to the specific circumstances.

[0048] The storage temperature of lithium battery electrolyte is generally lower than room temperature. The viscosity of electrolyte is negatively correlated with the increase of temperature, and the viscosity of electrolyte determines its injection efficiency into lithium battery container. With the development of lithium battery industry, the injection efficiency of electrolyte by existing equipment can no longer meet the production demand of existing lithium batteries, resulting in low efficiency of electrolyte injection. In addition, during the process of electrolyte being transmitted to the injection device, affected by the length of pipeline and operation interval time, the temperature of electrolyte during actual injection cannot be guaranteed to be within the required range. When the temperature of electrolyte decreases, the viscosity will increase, which may easily cause the pump body that drives the electrolyte to be injected into the battery to get stuck.

[0049] like Figure 1 As shown, in order to meet the current problem of electrolyte injection efficiency and reduce the occurrence of pump jamming, a second container 2 can be sleeved on the outer periphery of the first container 1 containing the electrolyte, and the gap between the first container 1 and the second container 2 can be used to hold a heat exchange medium. The electrolyte in the first container 1 is heat exchanged by the heat exchange medium to increase the temperature of the electrolyte and reduce the viscosity, which is more conducive to the injection of the electrolyte into the battery and improves the injection efficiency; on the other hand, it can also reduce the occurrence of pump jamming.

[0050] The electrolyte heat exchange device disclosed in the embodiment of the present application can perform heat exchange for the electrolyte required by other lithium batteries such as ternary lithium batteries or lithium iron phosphate batteries, so that the temperature of the electrolyte can be increased, thereby improving the injection efficiency.

[0051] The injection device disclosed in the embodiment of the present application can inject electrolyte into the lithium battery. In the manufacturing process of the battery, the battery injection process (i.e., the process of injecting electrolyte into the battery shell) is also a very important process. The production and manufacturing performance of the injection process will affect the final product performance of the battery. In some related technologies, during the battery injection process, an injection tool (such as an injection nozzle, etc.) is set at the edge of the battery injection port, and the battery injection port is injected through the injection tool.

[0052] A battery generally includes a housing, an electrode assembly, and an electrolyte. The housing can be used to contain the electrode assembly and the electrolyte. The electrode assembly is composed of a positive electrode sheet, a negative electrode sheet, and a separator. The electrolyte, as an electrolyte, can conduct ions between the positive electrode sheet and the negative electrode sheet of the electrode assembly, thereby achieving normal operation of the battery. For lithium batteries, the electrolyte may include lithium salts and organic solvents.

[0053] like Figure 1 As shown, in the first aspect, an embodiment of the present application provides a heat exchange device, comprising a first container 1 for containing an electrolyte and a second container 2 sleeved on the outer periphery of the first container 1, wherein the second container 2 and the first container 1 are spaced apart to form a chamber 3 structure, and the chamber 3 is used to contain a heat exchange medium; the heat exchange device also includes a heat exchange mechanism, the heat exchange mechanism includes a heating component 4, the heating component 4 can heat the heat exchange medium, the heat exchange mechanism is connected to the second container 2, that is, connected to the chamber 3, and can drive the heat exchange medium to circulate between the chamber 3 and the heating component 4.

[0054] By forming a chamber 3 outside the first container 1, the heat exchange medium can directly exchange heat with the electrolyte in the first container 1. The heat exchange mechanism drives the electrolyte to flow between the chamber 3 and the heating component 4, so that the heat exchange medium can continuously heat the electrolyte, increase the temperature of the electrolyte, reduce the viscosity, and improve the injection efficiency of the lithium battery electrolyte.

[0055] Optionally, the first container 1 and the second container 2 may be cylindrical structures or prismatic structures, or other shapes.

[0056] like Figure 1 As shown, optionally, a cover plate 16 can be provided at the opening position at the top of the chamber 3 to seal the chamber 3 and reduce the heat loss of the heat exchange medium; at the opposite end of the cover plate 16, i.e., the outer periphery of the bottom wall of the first container 1, a circle of bottom plate 17 can be provided to serve as the bottom wall of the chamber 3, and the outer edge of the bottom plate 17 is sealed and connected to the inner peripheral wall of the second container 2, and the bottom plate 17 cooperates with the top plate to make the chamber 3 a sealed space.

[0057] Optionally, the bottom height of the heating assembly 4 may be set higher than the center position of the chamber 3 in the vertical direction, so that the heat exchange medium can flow into the chamber 3 by its own gravity.

[0058] Optionally, the heat transfer medium can be a heat transfer oil, for example: benzene ring type heat transfer oil, alkyl naphthalene type heat transfer oil, alkyl biphenyl type heat transfer oil, biphenyl and biphenyl ether low melting mixture type heat transfer oil, alkyl biphenyl ether type heat transfer oil or mineral type heat transfer oil; of course, the heat transfer medium can also be water, liquid ammonia or a heat transfer medium mixed with a variety of inorganic active metals and their compounds, etc.

[0059] Optionally, the capacity of chamber 3 occupied by the heat exchange medium can be maintained at 70% to 90% of the total capacity of chamber 3, thereby reducing the risk of heat exchange medium overflowing from chamber 3; on the other hand, it is also convenient for the positive pressure pipeline 11 to transport pressurized medium into chamber 3.

[0060] like Figure 1 As shown, in some embodiments, the heating component 4 includes a third container 42, which is used to store heat exchange medium; the heat exchange mechanism includes a driving member 7 and a first connecting pipe 5, the driving member 7 is configured in the first connecting pipe 5, and the two ends of the first connecting pipe 5 are respectively connected to the second container 2 and the third container 42.

[0061] The third container 42 and the chamber 3 are connected by a first connecting pipe 5. At the same time, a driving member 7 is installed on the first connecting pipe 5. The driving member 7 can drive the heat exchange medium to flow from the third container 42 into the chamber 3, thereby improving the flow efficiency of the heat exchange medium and further improving the heat exchange efficiency of the heat exchange medium to the electrolyte.

[0062] Optionally, in some cases, the driving member 7 may not be provided, so that the height of the bottom wall of the third container 42 is higher than the center position of the chamber 3 in the vertical direction. In this way, the heat exchange medium in the third container 42 can flow into the chamber 3 by its own gravity, thereby reducing the production cost of the heat exchange device.

[0063] Optionally, the driving member 7 may be a driving motor.

[0064] like Figure 1 As shown, in some embodiments, the heat exchange mechanism includes at least one first solenoid valve 6 , and the first solenoid valve 6 is installed on the first connecting pipe 5 .

[0065] By installing the first solenoid valve 6 in the first connecting pipe 5 , the first solenoid valve 6 can control the flow or stillness of the heat exchange medium in the first connecting pipe 5 .

[0066] Optionally, a first solenoid valve 6 can be provided, installed at the position where the first connecting pipe 5 is connected to the second container 2. When it needs to be opened, the first solenoid valve 6 is opened, and the driving member 7 drives the heat exchange medium to flow; when the first solenoid valve 6 is closed, the heat exchange medium is locked in the first connecting pipe 5 and cannot flow into the chamber 3;

[0067] Of course, the first solenoid valve 6 can also be set at the position where the first connecting pipe 5 is connected to the third container 42. When it needs to be opened, the first solenoid valve 6 is opened, and the driving member 7 drives the heat exchange medium to flow; when the first solenoid valve 6 is closed, the heat exchange medium is locked in the third container 42 and cannot flow into the chamber 3.

[0068] like Figure 1As shown, optionally, two first solenoid valves 6 can be provided, and the two first solenoid valves 6 are respectively provided at the position where the first connecting pipe 5 is connected to the second container 2 and the position where the first connecting pipe 5 is connected to the third container 42, so that when the two first solenoid valves 6 are opened at the same time, the driving member 7 drives the heat exchange medium to flow from the third container 42 into the chamber 3; when it is necessary to close, the first solenoid valve 6 at the position where the first connecting pipe 5 is connected to the third container 42 can be closed first, and after the heat exchange medium in the first connecting pipe 5 has completely flowed into the chamber 3, the first solenoid valve 6 at the position where the first connecting pipe 5 is connected to the second container 2 is closed to reduce the residual amount of the heat exchange medium in the first connecting pipe 5 and reduce the loss of the heat exchange medium; of course, the two first solenoid valves 6 can also be closed at the same time.

[0069] like Figure 1 As shown, in some embodiments, the heating assembly 4 further includes a heating element 41 , and the heating element 41 extends within the third container 42 .

[0070] By arranging the heating element 41 in the third container 42 , the heating element 41 can heat the heat exchange medium to meet the temperature of the heat exchange medium.

[0071] Optionally, the heating method of the heating element 41 includes but is not limited to resistance heating, induction heating, arc heating, electron beam heating, etc.

[0072] Optionally, the heating temperature of the heat exchange medium by the heating element 41 is between 50 and 60°C.

[0073] like Figure 1 As shown, in some embodiments, the heat exchange mechanism further includes at least one stirring member 15 , which extends into the third container 42 and is used to stir the heat exchange medium so that the heat exchange medium is heated evenly in the third container 42 .

[0074] Optionally, two stirring members 15 are provided, which are respectively provided on both sides of the heating member 41 . Of course, more stirring members 15 can be provided.

[0075] Optionally, the stirring member 15 includes a stirring rod and a plurality of blades disposed on the stirring rod, and the stirring rod rotates to synchronously drive the blades to rotate to stir the heat exchange medium. Of course, the stirring member 15 can also be configured as other spoilers that can turbulent the heat exchange medium.

[0076] like Figure 1 As shown, in some embodiments, the heat exchange mechanism further includes a first temperature sensor 8 , which is disposed in the third container 42 , and is used to detect the temperature of the heat exchange medium in the third container 42 .

[0077] like Figure 1As shown, in some embodiments, the heat exchange mechanism further includes a second connecting pipe 9, and both ends of the second connecting pipe 9 are respectively connected to the chamber 3 and the third container 42.

[0078] By providing the second connecting pipe 9, after the heat exchange medium exchanges heat with the electrolyte, it can flow into the third container 42 through the second connecting pipe 9. The heating element 41 in the third container 42 heats the returning heat exchange medium, and then flows into the chamber 3 through the first connecting pipe 5, thereby realizing the circulation of the heat exchange medium.

[0079] like Figure 1 As shown, in some embodiments, the position where the second connecting pipe 9 is connected to the third container 42 is lower than the position where the first connecting pipe 5 is connected to the second container 2, and the position where the second connecting pipe 9 is connected to the third container 42 is adjacent to the bottom of the chamber 3. Therefore, the heat exchange medium at the bottom is subjected to the greatest pressure, which facilitates driving the heat exchange medium into the third chamber 3; the position where the second connecting pipe 9 is connected to the third container 42 is higher than the position where the first connecting pipe 5 is connected to the third container 42. Similarly, the position where the second connecting pipe 9 is connected to the third container 42 is higher than the position where the first connecting pipe 5 is connected to the third container 42, which facilitates the heat exchange medium to flow from the third container 42 into the chamber 3, thereby reducing the energy consumption generated by the driving member 7 during the driving process, saving energy and reducing emissions.

[0080] like Figure 1 As shown, in some embodiments, the heat exchange mechanism includes at least one second solenoid valve 10 , and the second solenoid valve 10 is installed on the second connecting pipe 9 .

[0081] By installing the second solenoid valve 10 in the second connecting pipe 9 , the second solenoid valve 10 can control the flow or stillness of the heat exchange medium in the second connecting pipe 9 .

[0082] Optionally, a second solenoid valve 10 may be provided, installed at the position where the second connecting pipe 9 is connected to the second container 2. When the heat exchange medium needs to flow into the third container 42, the second solenoid valve 10 is opened to drive the heat exchange medium to flow; when the second solenoid valve 10 is closed, the heat exchange medium is locked in the second connecting pipe 9 and cannot flow into the third container 42.

[0083] Of course, the second solenoid valve 10 can also be set at the position where the second connecting pipe 9 is connected to the third container 42. When it needs to be opened, the second solenoid valve 10 is opened to drive the heat exchange medium to flow; when the second solenoid valve 10 is closed, the heat exchange medium is locked in the chamber 3 and cannot flow into the third container 42.

[0084] like Figure 1As shown, optionally, two second solenoid valves 10 can be provided, and the two second solenoid valves 10 are respectively provided at a position where the second connecting pipe 9 is connected to the second container 2 and a position where the second connecting pipe 9 is connected to the third container 42, so that when the two second solenoid valves 10 are opened at the same time, the heat exchange medium is driven to flow from the chamber 3 into the third container 42; when it is necessary to close, the second solenoid valve 10 at the position where the second connecting pipe 9 is connected to the second container 2 can be closed first, and then the second solenoid valve 10 at the position where the second connecting pipe 9 is connected to the third container 42 can be closed; of course, the two second solenoid valves 10 can also be closed at the same time.

[0085] like Figure 1 As shown, in some embodiments, the heat exchange medium also includes a positive pressure pipeline 11, which is connected to the chamber 3 and is used to transport a pressurized medium into the chamber 3, so that the heat exchange medium in the chamber 3 is pushed into the third container 42, thereby increasing the flow rate of the heat exchange medium and improving the heat exchange efficiency.

[0086] Optionally, in some cases, the positive pressure pipeline 11 may not be provided, but the circulation of the heat exchange medium may be realized through the driving member 7. During the circulation, the first solenoid valve 6 and the second solenoid valve 10 are opened, and the driving member 7 drives the heat exchange medium to flow.

[0087] Optionally, the pressurized medium may be compressed air or nitrogen, etc.

[0088] like Figure 1 As shown, in some embodiments, the heat exchange device further includes a third solenoid valve 12, and the third solenoid valve 12 is disposed on the positive pressure pipeline.

[0089] By arranging the third solenoid valve 12 on the positive pressure pipeline 11 , the third solenoid valve 12 is used to control the opening or closing of the positive pressure pipeline 11 .

[0090] like Figure 1 As shown, in some embodiments, the heat exchange device further includes a pressure relief valve 13 , which is connected to the chamber 3 and is used to maintain the pressure balance in the chamber 3 , so that the positive pressure pipeline 11 can discharge the heat exchange medium out of the chamber 3 .

[0091] Optionally, the pressure relief valve 13 is installed on the cover plate 16 to facilitate the discharge of the pressurized medium.

[0092] like Figure 1 As shown, in some embodiments, a second temperature sensor 14 is disposed in the chamber 3. By disposing the second temperature sensor 14 in the chamber 3, the second temperature sensor 14 can detect the temperature of the heat exchange medium in the chamber 3.

[0093] Optionally, the heat exchange device also includes a controller, which is electrically connected to the first temperature sensor 8, the second temperature sensor 14, the first solenoid valve 6, the second solenoid valve 10, the third solenoid valve 12 and the driving member 7, and is used to control the first temperature sensor 8, the second temperature sensor 14, the first solenoid valve 6, the second solenoid valve 10, the third solenoid valve 12 and the driving member 7.

[0094] In some embodiments, the heat exchange device includes a heat-insulating member, which is disposed on the outer surface of the second container 2. By arranging the heat-insulating member on the outer surface of the second container 2, the second container 2 can be kept warm, the heat loss of the second container 2 can be reduced, and the heat loss of the heat exchange medium can be reduced, thereby improving the heat exchange efficiency.

[0095] Optionally, the thermal insulation component may be thermal insulation cotton or other thermal insulation materials.

[0096] Optionally, the electrolyte may be introduced into the first container 1 through the rod portion by other pump bodies, and then the electrolyte may be injected into the battery by other injection devices.

[0097] The embodiment of the present application provides a heat exchange device. Before liquid injection, two first solenoid valves 6 are opened, and the heat exchange medium is transmitted to the chamber 3 through the driving member 7. After each liquid injection, the heat exchange medium needs to be circulated once, that is, after each liquid injection, wait for new electrolyte to be injected into the first container 1, and the heat exchange medium is circulated once, so that the electrolyte newly entering the first container 1 can also be heat exchanged; each heat exchange medium circulation capacity is not less than 50% of the original capacity to meet the heat exchange demand, and two second solenoid valves 10 and a third solenoid valve 12 are opened in sequence during the circulation, and the heat exchange medium is transmitted back to the third container 42 through the positive pressure pipeline 11. Through the above structure, the heat exchange medium and the electrolyte exchange heat, and after the heat exchange medium heats the electrolyte, the temperature of the electrolyte increases and the viscosity decreases. On the one hand, as the viscosity of the electrolyte decreases, it is more conducive to the injection of the electrolyte into the battery; on the other hand, as the viscosity of the electrolyte decreases, the pump driving the electrolyte injection into the battery is reduced, and the pump jam phenomenon occurs, thereby improving the efficiency of the electrolyte injection into the battery.

[0098] In a second aspect, an embodiment of the present application provides a liquid injection device, including the electrolyte heat exchange device provided in the first aspect, and the liquid injection device has the same beneficial effects as the heat exchange device.

[0099] The liquid injection device further comprises a rod portion, which extends into the first container 1 and is used for injecting electrolyte into the first container 1 .

[0100] The above description is only an embodiment of the present application and is not intended to limit the protection scope of the present application. For those skilled in the art, the present application may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

[0101] The above is only a specific implementation of the present application, but the protection scope of the present application is not limited thereto. Any technician familiar with the technical field can easily think of changes or substitutions within the technical scope disclosed in the present application, which should be included in the protection scope of the present application. Therefore, the protection scope of the present application should be based on the protection scope of the claims.

[0102] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.

Claims

1. An electrolyte heat exchange device, characterized in that: include: A first container, used for containing electrolyte; A second container is sleeved on the outer circumference of the first container and is spaced apart from the first container to form a chamber for containing a heat exchange medium; The heat exchange mechanism comprises a heating component, wherein the heating component is used to heat a heat exchange medium. The heat exchange mechanism is connected to the second container and is used to drive the heat exchange medium to flow between the chamber and the heating component.

2. The heat exchange device according to claim 1, characterized in that: The heating assembly includes a third container for storing a heat exchange medium; The heat exchange mechanism further includes a driving member and a first connecting pipe, wherein the driving member is mounted on the first connecting pipe, and both ends of the first connecting pipe are respectively connected to the second container and the third container.

3. The heat exchange device according to claim 2, characterized in that: The heat exchange mechanism further includes at least one first solenoid valve, and the first solenoid valve is installed on the first connecting pipe.

4. The heat exchange device according to claim 2 or 3, characterized in that: The heating assembly further comprises a heating element, and the heating element extends into the third container.

5. The heat exchange device according to claim 2 or 3, characterized in that: The heat exchange mechanism further includes at least one stirring member, and the stirring member extends into the third container.

6. The heat exchange device according to claim 2 or 3, characterized in that: The heat exchange mechanism further includes a first temperature sensor, which is disposed in the third container.

7. The heat exchange device according to claim 2 or 3, characterized in that: The heat exchange mechanism further includes a second connecting pipe, and the second connecting pipe is connected to the second container and the third container respectively.

8. The heat exchange device according to claim 7, characterized in that: The position where the second connecting pipe is connected to the second container is lower than the position where the first connecting pipe is connected to the second container; The position where the second connecting pipe is connected to the third container is higher than the position where the first connecting pipe is connected to the third container.

9. The heat exchange device according to claim 7, characterized in that: The heat exchange mechanism further includes at least one second solenoid valve, and the second solenoid valve is installed on the second connecting pipe.

10. The heat exchange device according to claim 9, characterized in that: The heat exchange device further comprises a positive pressure pipeline, which is connected to the second container and is used for conveying pressurized medium into the chamber.

11. The heat exchange device according to claim 10, characterized in that: The heat exchange device further includes a third solenoid valve, and the third solenoid valve is arranged on the positive pressure pipeline.

12. The heat exchange device according to claim 10, characterized in that: The heat exchange device further comprises a pressure relief valve, and the pressure relief valve is communicated with the chamber.

13. The heat exchange device according to any one of claims 1 to 3, characterized in that: A second temperature sensor is disposed in the chamber.

14. The heat exchange device according to any one of claims 1 to 3, characterized in that: The heat exchange device further comprises a heat-insulating component, and the heat-insulating component is arranged on the outer surface of the second container.

15. A liquid injection device, characterized in that: A heat exchange device for an electrolyte comprising any one of claims 1 to 14.

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