Electrolyte temperature control system and electrolyte injection device

Abstract

The utility model discloses an electrolyte temperature control system and a liquid injection device. The electrolyte temperature control system comprises a liquid storage tank, an adjusting assembly, a liquid supply assembly and a control assembly, the liquid storage tank is provided with a first containing cavity and a second containing cavity, the first containing cavity is used for storing electrolyte, and the second containing cavity and the first containing cavity are arranged in a separated mode. The adjusting assembly comprises a first liquid storage tank, an adjuster and a conveying pipeline communicating with the first liquid storage tank and the second containing cavity, and the adjuster is arranged between the first liquid storage tank and the liquid storage tank and is configured to be capable of adjusting the temperature of the heat exchange medium in the conveying pipeline. The liquid supply assembly is used for conveying a second medium to the conveying pipeline, and the second medium and the first medium can jointly adjust the temperature of the electrolyte. The electrolyte temperature control system not only can control the temperature of the first medium through the regulator, but also can further regulate the temperature of the first medium by injecting the second medium, and the energy consumption of the regulator can be effectively reduced by adding the second medium.

Description

Technical Field

[0001] The utility model relates to the technical field of battery production equipment, in particular to an electrolyte temperature control system and a liquid injection device. Background Art

[0002] Liquid injection is an important step in the production process of lithium-ion batteries, and the temperature of the electrolyte will directly affect the injection effect. In the prior art, the battery injection device is generally provided with a heat exchange component and a closed conveying pipe. A heat exchange medium for regulating the temperature of the electrolyte is provided in the conveying pipe. The heat exchange component directly heats or cools the heat exchange medium in the conveying pipe. The heat exchange medium exchanges heat with the electrolyte to achieve control of the electrolyte temperature. After the heat exchange is completed, the heat exchange medium circulates to the heat exchange component, and the heat exchange component heats or cools the heat exchange medium again, so that the heat exchange medium can once again meet the temperature regulation requirements of the electrolyte. The temperature of the heat exchange medium changes greatly after exchanging heat with the electrolyte. The temperature regulation of the heat exchange medium in the closed conveying pipe is only achieved by the heat exchange component, which results in high energy consumption and high cost for the electrolyte temperature regulation in the prior art. Utility Model Content

[0003] The main purpose of the utility model is to provide an electrolyte temperature control system and a liquid injection device, which can solve the technical problem of high energy consumption in electrolyte temperature regulation.

[0004] To achieve the above objectives, the present invention provides an electrolyte temperature control system, comprising a liquid storage tank, a regulating assembly, a liquid supply assembly, and a control assembly. The liquid storage tank has a first and a second accommodating chamber, the first accommodating chamber being used to store electrolyte, and the second accommodating chamber being separate from the first accommodating chamber. The regulating assembly comprises a delivery pipe, a first liquid tank, a control valve, and a regulator. The delivery pipe connects the first liquid tank and the second accommodating chamber, the first liquid tank being used to store a first medium, and the delivery pipe being configured to deliver the first medium to the second accommodating chamber. The regulator is disposed between the first liquid tank and the liquid storage tank and is configured to regulate the temperature of the heat exchange medium within the delivery pipe. The liquid supply assembly comprises a second liquid tank being used to store a second medium and being configured to deliver the second medium to the delivery pipe. The control valve is disposed between the first and second liquid tanks and is configured to control whether the first liquid tank is connected to or disconnected from the second liquid tank. When the second liquid tank is connected to the first liquid tank, the second medium flows into the first liquid tank and, together with the first medium, flows into the second accommodating chamber, thereby regulating the temperature of the electrolyte. The control component includes a first temperature sensor and a controller. The first temperature sensor is electrically connected to the controller and is used to detect the temperature of the electrolyte. The controller is configured to control the working state of the control valve and / or regulator according to the temperature of the electrolyte.

[0005] In some embodiments, the first temperature sensor is used to detect the temperature value a of the electrolyte, the control component has a set temperature value b, and the controller is configured to control the opening of the control valve when the temperature value a and the temperature value b satisfy: 0℃<ab≤2℃, so that the second medium flows to the delivery pipeline, wherein the temperature of the second medium is lower than the temperature of the first medium.

[0006] In some embodiments, the first temperature sensor is used to detect the temperature value a of the electrolyte, the control component has a set temperature value b, and the controller is configured to control the opening of the control valve when the temperature value a and the temperature value b satisfy: 0℃<ba≤2℃, so that the second medium flows to the delivery pipeline, wherein the temperature of the second medium is higher than the temperature of the first medium.

[0007] In some embodiments, the first temperature sensor is used to detect the temperature value a of the electrolyte, the control component has a set temperature value b, the regulator includes a refrigeration control circuit, the refrigeration control circuit is electrically connected to the controller, and the refrigeration control circuit is electrically connected to the regulator, and the controller is configured to start the refrigeration control circuit of the regulator when the temperature value a and the temperature value b satisfy: ab≥5°C.

[0008] In some embodiments, the temperature of the second medium is lower than that of the first medium. The controller can also control the control valve to open, so that the first liquid storage tank is connected to the second liquid storage tank, so that the second medium flows to the first liquid storage tank and flows to the second accommodating chamber together with the first medium.

[0009] In some embodiments, the first temperature sensor is used to detect the temperature value a of the electrolyte, the control component has a set temperature value b, the regulator includes a heating control circuit, the heating control circuit is electrically connected to the controller, and the heating control circuit is electrically connected to the regulator, and the controller is configured to start the heating control circuit of the regulator when the temperature value a and the temperature value b satisfy: ba≥5°C.

[0010] In some embodiments, the temperature of the second medium is higher than that of the first medium. The controller can also control the control valve to open, so that the first liquid storage tank is connected to the second liquid storage tank, so that the second medium flows to the first liquid storage tank and flows to the second accommodating chamber together with the first medium.

[0011] In some embodiments, the regulator is configured as a compressor, and the compressor includes a cooling control circuit and a heating control circuit.

[0012] In some embodiments, the control component further includes a second temperature sensor for detecting the temperature c of the heat exchange medium flowing out of the second accommodating chamber, and the controller is configured to control the power of the regulator according to the temperature c.

[0013] In some embodiments, the liquid storage tank further includes a shell and a stirring portion, the shell is provided with a first accommodating cavity and a second accommodating cavity, the stirring portion is connected to the shell, and the stirring portion is used to stir the electrolyte.

[0014] A second aspect of the present application further provides a liquid injection device, which includes the electrolyte temperature control system of any of the above embodiments.

[0015] Compared with the prior art, the beneficial effects of the present invention are:

[0016] In the technical solution of the present application, the delivery pipe is connected to the second accommodating chamber so that the heat exchange medium in the delivery pipe can enter the second accommodating chamber, and the liquid supply component can replenish the second medium for the delivery pipe. The electrolyte temperature control system can not only control the temperature of the first medium through the regulator, but also further adjust the temperature of the first medium by injecting the second medium, thereby achieving the regulation of the electrolyte temperature. The addition of the second medium can effectively reduce the energy consumption of the regulator. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying any creative work.

[0018] Figure 1 This is a schematic structural diagram of an electrolyte temperature control system in one embodiment of the present utility model;

[0019] Figure 2 This is a structural diagram of a liquid injection device in one embodiment of the present invention.

[0020] Description of Figure Numbers:

[0021] Electrolyte temperature control system 100;

[0022] Liquid storage tank 110; first accommodating chamber 111; second accommodating chamber 112; housing 113; stirring portion 114;

[0023] Adjustment assembly 120; delivery pipeline 121; control valve 122; regulator 123; first medium 124; first liquid storage tank 125;

[0024] Liquid supply assembly 130; second medium 131; second liquid storage tank 132;

[0025] Control component 140; first temperature sensor 141; controller 142; second temperature sensor 143;

[0026] Liquid injection device 200;

[0027] Electrolyte tank 210 ; liquid injection unit 220 ; liquid injection pump 230 ; electrolyte 240 .

[0028] The realization of the purpose, functional features and advantages of the present invention will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0029] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0030] Filling is a critical step in the production of lithium-ion batteries, and electrolyte temperature directly impacts filling efficiency. During the filling process for aluminum-cased lithium-ion batteries, the electrolyte storage tank acts as a transport bridge between the electrolyte barrel and the filling pump, primarily serving to temporarily store electrolyte and stabilize the filling volume. The electrolyte temperature within the storage tank fluctuates with ambient temperature, and excessively low or high electrolyte temperature in the tank can affect the battery's liquid absorption efficiency. Specifically, excessively high electrolyte temperature increases the volatilization of water and solvents in the electrolyte, increasing electrolyte concentration and increasing corrosion of electrode materials and filling equipment. Excessively high electrolyte temperature can also degrade electrode material performance, shortening battery life. Excessively low electrolyte temperature slows electrolyte reaction, impacting battery efficiency. Furthermore, excessively low electrolyte temperature reduces electrolyte fluidity, resulting in low filling efficiency and uneven electrolyte distribution within the battery, impacting battery performance. Specifically, low electrolyte temperature increases electrolyte viscosity and surface tension, significantly slowing the rate at which the electrolyte soaks into the electrode. This low electrode soaking efficiency can cause residual electrolyte in the filling cup to overflow around the filling hole, where it can be blown into the residual liquid bucket and discarded. This can lead to insufficient electrolyte in the battery cell and the need for additional manpower to complete the refilling operation.

[0031] In the prior art, a battery's injection device is generally equipped with a heat exchange component and a closed delivery pipe. A heat exchange medium for regulating the electrolyte temperature is provided in the delivery pipe. The heat exchange component directly heats or cools the heat exchange medium in the delivery pipe. The heat exchange medium exchanges heat with the electrolyte to control the electrolyte temperature. After the heat exchange is completed, the heat exchange medium circulates to the heat exchange component, which heats or cools the heat exchange medium again, so that the heat exchange medium can once again meet the requirements for regulating the electrolyte temperature. The temperature of the heat exchange medium changes significantly after exchanging heat with the electrolyte. The temperature regulation of the heat exchange medium in the closed delivery pipe relies solely on the heat exchange component, which results in high energy consumption and high cost for the electrolyte temperature regulation in the prior art.

[0032] In order to solve the above technical problems, Figure 1 as well as Figure 2 As shown, the present application proposes an electrolyte temperature control system 100 , which includes a liquid storage tank 110 , a regulating component 120 , a liquid supply component 130 and a control component 140 .

[0033] like Figure 1 As shown, the liquid storage tank 110 has a first accommodating chamber 111 and a second accommodating chamber 112. The first accommodating chamber 111 is used to store the electrolyte 240, and the second accommodating chamber 112 is separated from the first accommodating chamber 111. The arrangement of the first accommodating chamber 111 and the second accommodating chamber 112 of the liquid storage tank 110 can be set according to different heat exchange requirements. Specifically, the liquid storage tank 110 can have a double-layer shell 113, the inner shell 113 defines the first accommodating chamber 111, and the outer shell 113 and the inner shell 113 together define the second accommodating chamber 112. The first accommodating chamber 111 can be set as a cylindrical concave cavity, and the second accommodating chamber 112 is arranged outside the first accommodating chamber 111 through the interlayer formed by the inner shell 113. In order to increase the heat exchange area, the first accommodating chamber 111 can also be set as a spiral chamber, and the second accommodating chamber 112 is similarly arranged outside the first accommodating chamber 111 through the interlayer formed by the inner shell 113, which will not be repeated here. It is understandable that in order to improve the heat exchange efficiency between the liquid in the second chamber and the electrolyte 240, the internal shell 113 of the liquid storage tank 110 can be made of materials such as high-strength steel with good thermal conductivity, which is not limited here.

[0034] like Figure 1As shown, the regulating assembly 120 includes a delivery pipe 121, a first liquid storage tank 125, a control valve 122, and a regulator 123. The delivery pipe 121 connects the first liquid storage tank 125 and the second accommodating chamber 112. The first liquid storage tank 125 is used to store a first medium 124. The delivery pipe 121 is configured to deliver the first medium 124 to the second accommodating chamber 112. The regulator is disposed between the first liquid storage tank 125 and the liquid storage tank 110 and is configured to regulate the temperature of the heat exchange medium within the delivery pipe 121. Specifically, the delivery pipe 121 is provided with the first medium 124 and communicates with the second accommodating chamber 112. The regulator 123 is configured to regulate the temperature of the heat exchange medium within the delivery pipe 121. The first medium 124 can be water or any other suitable heat exchange medium. The delivery pipe 121 communicates with the second accommodating chamber 112, meaning that the heat exchange medium within the delivery pipe 121 can enter the second accommodating chamber 112 through the delivery pipe 121. The regulator 123 is used to heat or cool the heat exchange medium in the delivery pipeline 121. The regulator 123 can be configured as a compressor or any other suitable component capable of regulating the temperature of the first medium 124. It is understood that when the control valve 122 is opened and the second medium 131 enters the delivery pipeline 121, the regulator 123 can heat or cool both the first medium 124 and the second medium 131 in the delivery pipeline 121.

[0035] like Figure 1As shown, the liquid supply assembly 130 includes a second liquid tank 132 for storing a second medium 131 and configured to deliver the second medium 131 to the delivery pipe 121. A control valve 122 is disposed between the first liquid tank 125 and the second liquid tank 132. The control valve 122 is configured to control whether the first liquid tank 125 is connected to or disconnected from the second liquid tank 132. When the second liquid tank 132 is connected to the first liquid tank 125, the second medium 131 flows into the first liquid tank 125 and flows into the second receiving chamber 112 together with the first medium 124, so that the second medium 131 and the first medium 124 can jointly adjust the temperature of the electrolyte 240. In some embodiments, the liquid supply assembly 130 may only provide the second medium 131 with a temperature higher than the first medium 124, only provide the second medium 131 with a temperature lower than the first medium 124, or provide both the second medium 131 with a temperature higher than and the second medium 131 with a temperature lower than the first medium 124. The second medium 131 can be a heat exchange medium with the same composition as the first medium 124, or a heat exchange medium with a different composition than the first medium 124, as long as the second medium 131 and the first medium 124 can jointly regulate the temperature of the electrolyte. The temperature of the second medium 131 can be set according to specific regulation requirements. The liquid supply assembly 130 can be configured as a cold storage tank or any suitable hot water tank. During the battery production process, the production line generally has cooling water. The second medium 131 can also be the cooling water within the production line, without limitation here.

[0036] like Figure 1 as well as Figure 2As shown, the control assembly 140 includes a first temperature sensor 141 and a controller 142. The first temperature sensor 141 is electrically connected to the controller 142 and is used to detect the temperature of the electrolyte 240. The controller 142 is configured to control the operating state of the valve 122 and / or the regulator 123 based on the temperature of the electrolyte 240. Specifically, the controller 142 can open the control valve 122 to connect the delivery pipe 121 with the liquid supply assembly 130. The controller 142 can also close the control valve 122 to seal the delivery pipe 121. The controller 142 can start or stop the regulator 123 to enable the regulator 123 to control the temperature of the heat exchange medium in the delivery pipe 121 when needed. The controller 142 can open only the control valve 122 to allow the first medium 124 and the second medium 131 to jointly regulate the temperature of the electrolyte 240. The controller 142 can also open only the regulator 123 to heat the first medium 124 to control the temperature of the electrolyte 240. The controller 142 may also open the control valve 122 and the regulator 123 simultaneously, so that the regulator 123 can simultaneously heat or reduce the temperature of the first medium 124 and the second medium 131 , thereby allowing the first medium 124 and the second medium 131 to jointly regulate the temperature of the electrolyte 240 .

[0037] In the technical solution of the present application, the delivery pipe 121 is connected to the second accommodating chamber 112 so that the heat exchange medium in the delivery pipe 121 can enter the second accommodating chamber 112, and the liquid supply component 130 can replenish the second medium 131 for the delivery pipe 121. The electrolyte temperature control system 100 can not only control the temperature of the first medium 124 through the regulator 123, but also further adjust the temperature of the first medium 124 by injecting the second medium 131, thereby achieving the regulation of the temperature of the electrolyte 240. The addition of the second medium 131 can effectively reduce the energy consumption of the regulator 123. It is understood that after the second medium 131 is added to the delivery pipe 121, the regulator 123 can regulate the temperature of the mixed second medium 131 and first medium 124. Since the temperature of the second medium 131 can be higher or lower than the temperature of the first medium 124 according to the required temperature adjustment, after the first medium 124 and the second medium 131 are mixed, the regulator 123 adjusts the temperature of the mixed heat exchange medium, which can improve the efficiency of the regulator 123 in adjusting the temperature of the heat exchange medium in the delivery pipe 121 to the required temperature. The electrolyte temperature control system 100 controls the temperature of the electrolyte 240 within an appropriate range, which helps to improve the injection efficiency of the electrolyte 240, reduce electrolyte 240 waste, and reduce the need for rehydration operations after the electrolyte 240 is injected.

[0038] In the production of lithium-ion batteries, the regulator 123 and the control valve 122 cooperate with each other to fully utilize the liquid supply component 130 to adjust the temperature of the first medium 124, thereby effectively utilizing the second medium 131, reducing the use of the regulator 123, reducing the energy consumption of the regulator 123, and reducing the cost of temperature regulation of the electrolyte 240. Figure 1 As shown, in some embodiments, the first temperature sensor 141 is used to detect a temperature value a of the electrolyte 240, the control assembly 140 has a set temperature value b, and the controller 142 is configured to control the opening of the control valve 122 when the temperature values ​​a and b satisfy the following condition: 0°C < ab ≤ 2°C, thereby allowing the second medium 131 to flow into the delivery pipe 121, wherein the temperature of the second medium 131 is lower than the temperature of the first medium 124. The set value can be any temperature value that meets the injection requirements. Specifically, taking the temperature value b as 35°C as an example, when the temperature value a is higher than the temperature value b, the electrolyte 240 needs to be cooled. At this time, the controller 142 opens the control valve 122, allowing the second medium 131 to merge with the first medium 124. Since the temperature of the second medium 131 is lower than that of the first medium 124, the second medium 131 and the first medium 124 can jointly cool the electrolyte 240. Specifically, temperature value a can be 0.1°C, 0.5°C, 0.8°C, 1°C, 1.7°C, or 2°C higher than temperature value b, without limitation. When 0°C < ab ≤ 2°C, temperature value a is relatively high. The combined regulation of electrolyte 240 by second medium 131 and first medium 124 fully utilizes water resources within the production line, thereby avoiding the use of regulator 123 and saving energy.

[0039] In some embodiments, the first temperature sensor 141 is used to detect a temperature value a of the electrolyte 240. The control assembly 140 has a set temperature value b. The controller 142 is configured to control the opening of the control valve 122 to allow the second medium 131 to flow into the delivery pipe 121 when the temperature values ​​a and b satisfy the following relationship: 0°C < b a ≤ 2°C. The temperature of the second medium 131 is higher than that of the first medium 124. Similarly, taking a temperature value b of 35°C as an example, when the temperature value a is lower than the temperature value b, the electrolyte 240 needs to be heated. In this case, the controller 142 opens the control valve 122, allowing the second medium 131 to merge with the first medium 124. Since the temperature of the second medium 131 is higher than that of the first medium 124, the second medium 131 and the first medium 124 can jointly raise the temperature of the electrolyte 240. Specifically, the temperature value a can be 0.1°C, 0.5°C, 0.8°C, 1°C, 1.7°C, or 2°C lower than the temperature value b, without limitation. 0°C<ba≤2°C, the temperature value a is at a relatively low stage, and the joint regulation of the electrolyte 240 by the second medium 131 and the first medium 124 fully utilizes the water source in the production line, thereby avoiding the use of the regulator 123 and saving energy consumption.

[0040] When the temperature of the electrolyte 240 is too high or too low and the water source introduced into the production line cannot quickly adjust the electrolyte temperature together with the first medium 124, the control unit can start the regulator 123 to make the temperature of the first medium 124 and the second medium 131 quickly reach the temperature value required to adjust the electrolyte temperature. Figure 1 As shown, in some embodiments, a first temperature sensor 141 is used to detect a temperature value a of the electrolyte 240. The control assembly 140 has a set temperature value b. The regulator 123 includes a cooling control circuit electrically connected to the controller 142, which is also electrically connected to the regulator 123. The controller 142 is configured to activate the cooling control circuit of the regulator 123 when the temperature values ​​a and b satisfy the condition ab ≥ 5°C. Similarly, taking temperature b as an example, when temperature a is higher than temperature b and ab ≥ 5°C, temperature a is too high and the electrolyte 240 needs to be rapidly cooled. At this point, the controller 142 activates the regulator 123. The cooling control circuit of the regulator 123 places the regulator 123 in cooling mode, thereby rapidly reducing the temperature of the first medium 124 and thereby rapidly cooling the electrolyte 240. Specifically, temperature a can be 5°C, 5.5°C, 5.8°C, 6°C, 6.7°C, or 7°C higher than temperature b, without limitation. Furthermore, in some embodiments, the temperature of the second medium 131 is lower than that of the first medium 124. The controller 142 can further control the control valve 122 to open, connecting the first liquid tank 125 to the second liquid tank 132, so that the second medium 131 flows into the first liquid tank 125 and flows together with the first medium 124 to the second accommodating chamber 112 through the delivery pipe 121. In other words, the second medium 131 mixes with the first medium 124, and the regulator 123 can simultaneously regulate the temperature of the first medium 124 and the second medium 131, thereby further improving the efficiency of the first medium 124 and the second medium 131 in regulating the temperature of the electrolyte 240. Furthermore, the introduction of the second medium 131 can also reduce the energy consumption of the regulator 123, which will not be further described here.

[0041] like Figure 1As shown, in some embodiments, the first temperature sensor 141 is used to detect the temperature value a of the electrolyte 240, the control component 140 has a set temperature value b, and the regulator 123 includes a heating control circuit, which is electrically connected to the controller 142, and the heating control circuit is electrically connected to the regulator 123. The controller 142 is configured to activate the heating control circuit of the regulator 123 when the temperature values ​​a and b satisfy: ba ≥ 5°C. Similarly, taking the temperature value b as 35°C as an example, when the temperature value a is lower than the temperature value b, and: ba ≥ 5°C, the temperature value b is in an excessively high stage, and the electrolyte 240 needs to be quickly heated. At this time, the controller 142 activates the regulator 123, and the heating control circuit of the regulator 123 can put the regulator 123 into heating mode, thereby quickly increasing the temperature of the first medium 124, thereby achieving rapid heating of the electrolyte 240. Specifically, temperature value a can be 5°C, 5.5°C, 5.8°C, 6°C, 6.7°C, or 7°C lower than temperature value b, without limitation. Furthermore, in some embodiments, the temperature of the second medium 131 is higher than the temperature of the first medium 124. The controller 142 can also control the control valve 122 to open, connecting the first liquid storage tank 125 to the second liquid storage tank 132, so that the second medium 131 flows into the first liquid storage tank 125 and flows together with the first medium 124 through the delivery pipe 121 to the second accommodating chamber 112. In other words, the second medium 131 mixes with the first medium 124, and the regulator 123 can simultaneously regulate the temperature of the first medium 124 and the second medium 131, thereby further improving the temperature regulation efficiency of the first medium 124 and the second medium 131 on the electrolyte 240. The introduction of the second medium 131 can also reduce the energy consumption of the regulator 123, which will not be further described here. It should be noted that if the liquid supply assembly 130 can only provide the second medium 131 having a temperature higher than that of the first medium 124, the control valve 122 is closed when the electrolyte temperature control system 100 needs to cool the electrolyte 240, and the control valve 122 is opened when the electrolyte temperature control system 100 needs to increase the temperature of the electrolyte 240. If the liquid supply assembly 130 can only provide the second medium 131 having a temperature lower than that of the first medium 124, the control valve 122 is closed when the electrolyte temperature control system 100 needs to increase the temperature of the electrolyte 240, and the control valve 122 is opened when the electrolyte temperature control system 100 needs to cool the electrolyte 240.

[0042] Depending on the specific requirements, the regulator 123 can be configured using different devices. The regulator 123 can be configured as a thermoelectric cooler, a steam jet chiller, or a compressor. In some embodiments, the regulator 123 is configured as a compressor, which includes a cooling control circuit and a heating control circuit. The compressor has a fast response speed, precise temperature control, a wide temperature control range, and stable operation. By adjusting its operating state, the compressor can accurately control the temperature of the first medium 124 and the second medium 131 in the delivery pipeline 121, thereby improving the quality and efficiency of liquid injection.

[0043] The first medium 124 and the second medium 131 in the delivery pipe 121 can enter the second accommodating chamber 112 to adjust the temperature of the electrolyte 240. Specifically, the liquid storage tank 110 is provided with a liquid inlet and a liquid outlet. The liquid inlet and the liquid outlet are respectively connected to the second accommodating chamber 112, and the heat exchange medium in the delivery pipe 121 flows into the second accommodating chamber 112 from the liquid inlet, and then flows out of the accommodating chamber from the liquid storage port after heat exchange. In some embodiments, in order to further improve the temperature control accuracy of the electrolyte 240, the control component 140 can also be provided with a second temperature sensor, which is used to detect the temperature c of the heat exchange medium flowing out of the second accommodating chamber 112. The controller 142 is configured to control the power of the regulator 123 according to the temperature c. It should be noted that the heat exchange medium here can be the first medium 124, the second medium 131, or a mixture of the first medium 124 and the second medium 131. The provision of the second temperature sensor enables the power setting of the regulator 123 to be more precise, the temperature control of the electrolyte 240 to be more precise, and unnecessary energy consumption of the regulator 123 to be reduced.

[0044] like Figure 1 As shown, in some embodiments, to improve the temperature uniformity of the electrolyte 240, the liquid storage tank 110 may further include a housing 113 and an agitating portion 114. The housing 113 is provided with a first accommodating chamber 111 and a second accommodating chamber 112. The agitating portion 114 is connected to the housing 113 and is used to agitate the electrolyte 240. The agitating portion 114 may be configured as a low-speed stirring paddle. The provision of the agitating portion 114 may also improve the mixing uniformity of the electrolyte 240, reduce precipitation of the electrolyte 240, reduce bubbles within the electrolyte 240, and improve battery performance.

[0045] like Figure 2As mentioned above, the second aspect of the present application further proposes a liquid injection device 200, which includes the electrolyte temperature control system 100 of any of the above embodiments. Specifically, the liquid injection device 200 may also include an electrolyte barrel 210, a liquid injection part 220, a liquid injection pump 230, etc. The electrolyte barrel 210 is used to transport electrolyte 240 into the liquid storage tank 110, and the liquid injection pump 230 transports the electrolyte 240 in the liquid storage tank 110 to the liquid injection part 220 to achieve liquid injection of the battery. The liquid injection part 220 can be any suitable battery cell component. Thanks to the improvement of the above-mentioned electrolyte temperature control system 100, the liquid injection device 200 of this embodiment has the same technical effect as the above-mentioned electrolyte temperature control system 100, which will not be repeated here.

[0046] It should be noted that if the embodiments of the present invention involve directional indications (such as up, down, left, right, front, back, etc.), the directional indications are only used to explain the relative position relationship, movement status, etc. between the components in a certain specific posture. If the specific posture changes, the directional indications will also change accordingly.

[0047] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the present invention, the descriptions of "first", "second", etc. are only for descriptive purposes and cannot be understood as indicating or suggesting their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features limited to "first" and "second" may explicitly or implicitly include at least one of such features. In addition, if "and / or", "and / or" or "and / or" appear in the full text, its meaning includes three parallel solutions. Taking "A and / or B" as an example, it includes solution A, solution B, or solutions that satisfy both A and B. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the ability of ordinary technicians in this field to implement. When the combination of technical solutions is mutually contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0048] The above are only preferred embodiments of the present invention and do not limit the patent scope of the present invention. All equivalent structural transformations made by using the contents of the present invention specification and drawings under the utility model concept, or direct / indirect application in other related technical fields are included in the patent protection scope of the present invention.

Claims

1. An electrolyte temperature control system, characterized in that: include: a liquid storage tank having a first accommodating chamber and a second accommodating chamber, wherein the first accommodating chamber is used to store electrolyte, and the second accommodating chamber is separated from the first accommodating chamber; a regulating assembly comprising a delivery pipe, a first liquid storage tank, a control valve, and a regulator, wherein the delivery pipe connects the first liquid storage tank and the second accommodating chamber, the first liquid storage tank being used to store a first medium, the delivery pipe being configured to deliver the first medium to the second accommodating chamber, and the regulator being disposed between the first liquid storage tank and the liquid storage tank and being configured to regulate the temperature of the heat exchange medium in the delivery pipe; a liquid supply assembly comprising a second liquid storage tank for storing a second medium and configured to deliver the second medium to the delivery pipeline; a control valve disposed between the first and second liquid storage tanks, the control valve for controlling the connection or disconnection of the first liquid storage tank from the second liquid storage tank; when the second liquid storage tank is connected to the first liquid storage tank, the second medium flows into the first liquid storage tank and flows into the second accommodating chamber together with the first medium to regulate the temperature of the electrolyte; A control component includes a first temperature sensor and a controller, wherein the first temperature sensor is electrically connected to the controller and is used to detect the temperature of the electrolyte. The controller is configured to control the working state of the control valve and / or the regulator according to the temperature of the electrolyte.

2. The electrolyte temperature control system according to claim 1, characterized in that: The first temperature sensor is used to detect the temperature value a of the electrolyte, the control component has a set temperature value b, and the controller is configured to control the opening of the control valve when the temperature value a and the temperature value b satisfy the following conditions: 0°C<ab≤2°C, so that the second medium flows to the delivery pipeline, wherein the temperature of the second medium is lower than the temperature of the first medium.

3. The electrolyte temperature control system according to claim 1, characterized in that: The first temperature sensor is used to detect the temperature value a of the electrolyte, the control component has a set temperature value b, and the controller is configured to control the opening of the control valve when the temperature value a and the temperature value b satisfy the following conditions: 0°C<ba≤2°C, so that the second medium flows to the delivery pipeline, wherein the temperature of the second medium is higher than the temperature of the first medium.

4. The electrolyte temperature control system according to claim 1, characterized in that: The first temperature sensor is used to detect the temperature value a of the electrolyte, the control component has a set temperature value b, the regulator includes a refrigeration control circuit, the refrigeration control circuit is electrically connected to the controller, and the refrigeration control circuit is electrically connected to the regulator, and the controller is configured to start the refrigeration control circuit of the regulator when the temperature value a and the temperature value b satisfy: ab≥5°C.

5. The electrolyte temperature control system according to claim 4, characterized in that: The temperature of the second medium is lower than that of the first medium. The controller can also control the control valve to open, so that the first liquid storage tank is connected to the second liquid storage tank, so that the second medium flows to the first liquid storage tank and flows to the second accommodating chamber together with the first medium.

6. The electrolyte temperature control system according to claim 1, characterized in that: The first temperature sensor is used to detect the temperature value a of the electrolyte, the control component has a set temperature value b, the regulator includes a heating control circuit, the heating control circuit is electrically connected to the controller, and the heating control circuit is electrically connected to the regulator, and the controller is configured to start the heating control circuit of the regulator when the temperature value a and the temperature value b satisfy: ba≥5°C.

7. The electrolyte temperature control system according to claim 6, characterized in that: The temperature of the second medium is higher than that of the first medium. The controller can also control the control valve to open, so that the first liquid storage tank is connected to the second liquid storage tank, so that the second medium flows to the first liquid storage tank and flows to the second accommodating chamber together with the first medium.

8. The electrolyte temperature control system according to claim 1, characterized in that: The regulator is configured as a compressor, and the compressor includes a cooling control circuit and a heating control circuit; and / or, The control component further includes a second temperature sensor for detecting a temperature c of the heat exchange medium flowing out of the second accommodating chamber. The controller is configured to control the power of the regulator according to the temperature c.

9. The electrolyte temperature control system according to claim 1, characterized in that: The liquid storage tank further includes a shell and a stirring portion. The shell is provided with the first accommodating cavity and the second accommodating cavity. The stirring portion is connected to the shell and is used to stir the electrolyte.

10. A liquid injection device, characterized in that: The electrolyte temperature control system comprises the electrolyte temperature control system according to any one of claims 1 to 9.

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