Temperature control equipment for battery liquid injection and formation workshop

Abstract

The utility model relates to temperature control equipment for a battery liquid injection and formation workshop. The temperature control equipment comprises a medium-temperature water system, a refrigerating unit and a heating unit, the medium-temperature water system comprises a water outlet main pipe and at least two refrigerating units arranged in the liquid injection workshop, the refrigerating units are connected with the water outlet main pipe and the circulating main pipe through first branch pipes, and the refrigerating units are used for conducting heat exchange on liquid in the first branch pipes, so that the temperature of the liquid in the first branch pipes is increased, and the temperature in the liquid injection workshop is reduced; the at least two heating units are arranged in the formation workshop, the heating units are connected with the circulating main pipe and the water outlet main pipe through second branch pipes, and the heating units are used for conducting heat exchange on liquid in the second branch pipes, so that the liquid in the second branch pipes is cooled, and the temperature in the formation workshop is increased. Namely, the waste heat generated by the refrigerating unit is reasonably utilized to the heating unit, so that the cooling capacity of the medium-temperature water system is approximately kept the same and can be recycled.

Description

Technical Field

[0001] The utility model relates to the technical field of battery production temperature control, in particular to a temperature control device used in battery injection and formation workshops. Background Art

[0002] In the production and processing of lithium batteries, two processes, injection and formation, are required to produce finished batteries. Injection is the process of injecting electrolyte into the vacuum-dried, deeply dehydrated battery shell. Formation is the process of charging the battery after injection. Effective control of the ambient temperature in the injection and formation workshops plays an important role in improving the quality of lithium batteries. According to the production process requirements of lithium batteries, the ambient temperature requirements for injection and formation workshops are: 21±3℃ (all-year cooling) for injection workshops and 45±3℃ (all-year heating) for formation. The ambient temperature requirements for injection workshops and formation workshops are very different.

[0003] When designing the air conditioning system of the existing lithium battery filling and formation workshops, the method of setting up a set of independent air conditioning terminal equipment (rotary dehumidifier) ​​for each workshop is often adopted to meet the temperature design requirements of each workshop. For example, the air conditioning terminal equipment of the formation workshop treats the air to an ultra-low dew point (-40°C) dry state through a two-stage rotary wheel, and then uses electric heating to heat the temperature to about 50°C before sending it into the workshop. In this way, there is a mutual cancellation of cold and heat, and the heat source used for heating the air is electricity or steam; the air conditioning terminal equipment of the filling workshop also brings the indoor waste heat into the outdoor and dissipates it in vain, resulting in obvious heat waste and poor economic efficiency.

[0004] Authorization announcement number: CN 218957844 U, application date: 2022.11.30, the utility model name is temperature control system and lithium battery production equipment, this utility model discloses a temperature control system and lithium battery production equipment, the system includes a partition, a heat source, an air volume control component, a third fan and a temperature sensor, the partition separates the storage location into an air guide chamber and a formation chamber, the partition is provided with an opening, the opening includes a first opening, a second opening and a third opening, the first opening is located on the first side of the formation chamber, the second opening is located on the first side or the second side of the formation chamber, the third opening is located on the third side of the formation chamber, the heat source is arranged at the first opening, the air volume control component is arranged at the first opening and / or the second opening, for controlling the air volume flowing through the first opening and the second opening, the air in the formation chamber flows into the air guide chamber through the first opening and / or the second opening, the third fan is arranged at the third opening, for guiding the air in the air guide chamber to the formation chamber, and the temperature sensor is arranged in the formation chamber. The temperature control system of the utility model can accurately control the temperature in the storage location, which is convenient for the production and processing of lithium batteries.

[0005] The above prior art sets a heat source at the first opening, and adjusts the temperature of the battery formation chamber through the air volume control component and the third fan. This temperature adjustment method is not efficient. First, the first opening cannot be too large. Second, the heat source is the only component that brings heat. The above prior art only sets one heat source at the first opening, so the heating process is slow, and the time taken for the temperature of the formation chamber to rise is long. The larger the area of ​​the formation chamber, the more obvious this disadvantage is. Utility Model Content

[0006] In view of the fact that the temperature of the prior art formation workshop rises slowly, the temperature adjustment method is inefficient, and no problem of how to cool the injection workshop is proposed, the purpose of the utility model is to provide a temperature control device for battery injection and formation workshops.

[0007] The technical solution provided by the utility model is:

[0008] A temperature control device for battery filling and formation workshops, comprising:

[0009] Medium temperature water system, the medium temperature water system includes a water outlet main;

[0010] Refrigeration unit, there are no less than two refrigeration units and they are installed in the liquid injection workshop. The refrigeration unit is connected to the water outlet main pipe and the circulation main pipe through branch pipe 1. The refrigeration unit is used to exchange heat with the liquid in branch pipe 1, so that the liquid in branch pipe 1 is heated up and the temperature in the liquid injection workshop is reduced;

[0011] The heating unit has no less than two and is arranged in the formation workshop. The heating unit is connected to the circulation main pipe and the water outlet main pipe through branch pipe 2. The heating unit is used to exchange heat with the liquid in branch pipe 2, cool the liquid in branch pipe 2, and increase the temperature in the formation workshop.

[0012] Furthermore, the refrigeration unit includes a first heat exchanger and a first refrigerant circulation unit connected to the first heat exchanger; the first heat exchanger is used to exchange heat between the refrigerant introduced into the first refrigerant circulation unit and the liquid in branch pipe 1, and the first refrigerant circulation unit is used to exchange heat between the refrigerant discharged from the first heat exchanger and the air in the liquid injection workshop.

[0013] Furthermore, the first heat exchanger includes a first refrigerant pipeline and a first liquid pipeline that are independent of each other; the branch pipe 1 includes a first branch pipe and a second branch pipe respectively connected to the two ends of the first heat exchanger, and the second branch pipe is also connected to the circulation main pipe; the first branch pipe is led out from the water outlet main pipe, and the liquid is introduced into the first liquid pipeline from the first branch pipe. The first heat exchanger is used to condense the gas refrigerant into liquid refrigerant, and the heat generated is used to heat the liquid in the first liquid pipeline; the second branch pipe is used to collect the heated liquid into the circulation main pipe.

[0014] Furthermore, the first refrigerant cycle unit comprises:

[0015] a first throttle valve, the inlet of which is connected to the first heat exchanger, and the first throttle valve is used to reduce the pressure and throttle the condensed liquid refrigerant;

[0016] A first evaporator, the inlet of which is connected to the outlet of the first throttle valve; the first evaporator is used to evaporate the liquid refrigerant from the first heat exchanger into a gas refrigerant at a low pressure, and absorb the heat of the air blown in by the first circulating fan box;

[0017] a first compressor, wherein a first four-way reversing device is used to connect the outlet of the first compressor to the first heat exchanger, and the first four-way reversing device is also used to connect the inlet of the first compressor to the outlet of the first evaporator;

[0018] The first heat exchanger, the first throttle valve, the first evaporator, the first compressor and the first four-way reversing device are connected in series.

[0019] Furthermore, the first circulating air box is used for circulating the air in the liquid injection workshop; the first evaporator is connected to the first circulating air box as a surface cooling function section of the first circulating air box.

[0020] Furthermore, the heating unit includes a second heat exchanger and a second refrigerant circulation unit connected to the second heat exchanger; the second heat exchanger is used to exchange heat between the refrigerant introduced into the second refrigerant circulation unit and the liquid in branch pipe 2, and the second refrigerant circulation unit is used to exchange heat between the refrigerant discharged from the second heat exchanger and the air in the formation workshop.

[0021] Furthermore, the second heat exchanger includes a second refrigerant pipeline and a second liquid pipeline that are independent of each other; the branch pipe 2 includes a third branch pipe and a fourth branch pipe respectively connected to the two ends of the second heat exchanger; the third branch pipe is led out from the circulation main pipe, and the fourth branch pipe is merged into the water outlet main pipe; the heated liquid is passed into the second liquid pipeline through the third branch pipe, and the second heat exchanger is used to vaporize the liquid refrigerant into gas refrigerant, and at the same time to absorb the heat of the liquid in the second liquid pipeline; the fourth branch pipe is used to merge the cooled liquid into the water outlet main pipe.

[0022] Furthermore, the second refrigerant cycle unit comprises:

[0023] a second throttle valve, the outlet of which is connected to the second heat exchanger, and the second throttle valve is used to reduce the pressure and throttle the condensed liquid refrigerant;

[0024] a second condenser, the outlet of the second condenser being connected to the inlet of the second throttle valve; the second condenser is used to condense the gas refrigerant from the second compressor into liquid refrigerant, and the heat generated is used to heat the air blown into the second circulating fan box;

[0025] a second compressor, wherein a second four-way reversing device is used to connect the outlet of the second compressor to the second condenser, and the second four-way reversing device is also used to connect the inlet of the second compressor to the second heat exchanger;

[0026] The second heat exchanger, the second throttle valve, the second condenser, the second compressor and the second four-way reverser are connected in series.

[0027] Furthermore, the second circulating air box is used for circulating the air in the workshop; the second condenser is connected to the second circulating air box as a surface heating functional section of the second circulating air box.

[0028] Furthermore, the liquid injection workshop is provided with a first temperature sensor; and the chemical formation workshop is provided with a second temperature sensor.

[0029] Compared with the prior art, the technical solution provided by the utility model has the following beneficial effects:

[0030] The utility model arranges a refrigeration unit and a branch pipe 1 connected to the refrigeration unit in the liquid injection workshop, so that the refrigeration unit can heat the liquid in the branch pipe 1 while lowering the temperature of the liquid injection workshop; arranges a heating unit and a branch pipe 2 connected to the heating unit in the formation workshop, so that the heating unit can increase the temperature of the formation workshop while lowering the liquid in the branch pipe 2. Since the head end of the branch pipe 2 is connected to the end of the branch pipe 1, and the end of the branch pipe 2 is merged into the water outlet main pipe, the cooling capacity of the water outlet main pipe can still be kept roughly the same after passing through the liquid injection workshop and the formation workshop.

[0031] That is, the waste heat generated by the refrigeration unit is rationally utilized in the heating unit, so that the cooling capacity of the medium-temperature water system remains roughly the same and can be used repeatedly. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 This is a schematic diagram of the overall structure of the temperature control equipment of the liquid injection workshop in one embodiment of the present application;

[0033] Figure 2 This is a schematic diagram of the overall structure of the temperature control equipment in a formation workshop in one embodiment of the present application.

[0034] Explanation of the symbols in the schematic diagram:

[0035] Medium temperature water system 1, water outlet main pipe 11, first branch pipe 12, second branch pipe 13, circulation main pipe 14, third branch pipe 15, fourth branch pipe 16, water inlet main pipe 17;

[0036] A first heat exchanger 21, a first throttle valve 22, a first evaporator 23, a first compressor 24, a first four-way reversing device 25, and a first on-off valve 26;

[0037] A first circulating air box 3 and a second circulating air box 4;

[0038] A second heat exchanger 31, a second throttle valve 32, a second condenser 33, a second compressor 34, a second four-way reversing device 35, and a second on-off valve 36;

[0039] A first temperature sensor 5 and a second temperature sensor 6 . DETAILED DESCRIPTION

[0040] In order to further understand the content of the utility model, the utility model is described in detail in conjunction with the drawings and embodiments.

[0041] The structures, proportions, sizes, etc. illustrated in the drawings of this specification are only used to match the contents disclosed in the specification for people familiar with this technology to understand and read, and are not used to limit the limiting conditions for the implementation of the present invention, so they have no substantial technical significance. Any modification of the structure, change of the proportion relationship or adjustment of the size, without affecting the effects and purposes that can be achieved by the present invention, should still fall within the scope of the technical content disclosed by the present utility model. At the same time, the terms such as "upper", "lower", "left", "right", "middle" and so on quoted in this specification are only for the convenience of description, and are not used to limit the scope of implementation. The change or adjustment of their relative relationship should also be regarded as the scope of implementation of the present invention without substantially changing the technical content.

[0042] Since the lithium battery filling workshop and formation workshop adopt different production processes, the requirements for environmental temperature are also different. The filling workshop needs to maintain 21±3℃ (all-year cooling) throughout the year, and the formation workshop needs to maintain 45±3℃ (all-year heating) throughout the year. The utility model arranges a number of refrigeration units in the area where cooling is required, and a number of heating units in the area where heating is required.

[0043] The present application discloses a temperature control device for battery filling and formation workshops, which uses the existing medium-temperature water system in the workshop as a heat transfer medium, realizes heat relay transfer through a refrigeration unit, a heating unit, branch pipe one, and branch pipe two, and "transports" the excess heat generated by the refrigeration unit in the filling workshop to the formation workshop instead of discharging it to the outdoors, thereby improving the energy utilization rate of the production process and achieving the goal of energy saving and consumption reduction.

[0044] The temperature control equipment for battery filling and formation workshop of the present application comprises a medium-temperature water system 1, a refrigeration unit, a heating unit, a circulation main pipe 14, a branch pipe 1, and a branch pipe 2. The medium-temperature water system 1 comprises a water inlet main pipe 11 and a water outlet main pipe 17, and the medium-temperature water system is provided by a medium-temperature chiller unit or a free cooling system of a lithium battery factory.

[0045] There are no less than two refrigeration units and heating units. The refrigeration unit is located in the liquid injection workshop, and the heating unit is located in the chemical formation workshop. The refrigeration unit includes a first heat exchanger 21 and a first refrigerant circulation unit. The first refrigerant circulation unit is connected to the first heat exchanger 21. The first heat exchanger 21 includes a first refrigerant pipeline and a first liquid pipeline that are independent of each other. The heating unit includes a second heat exchanger 31 and a second refrigerant circulation unit. The second refrigerant circulation unit is connected to the second heat exchanger 31. The second heat exchanger 31 includes a second refrigerant pipeline and a second liquid pipeline that are independent of each other. The first heat exchanger 21 and the second heat exchanger 31 are preferably plate heat exchangers.

[0046] The refrigeration unit is connected to the water outlet pipe 11 and the circulation pipe 14 through branch pipe 1. The refrigeration unit is used to exchange heat with the liquid in branch pipe 1, so that the liquid in branch pipe 1 is heated up, and at the same time it is used to reduce the temperature in the injection workshop; the heating unit is connected to the circulation pipe 14 and the water outlet pipe 11 through branch pipe 2. The heating unit is used to exchange heat with the liquid in branch pipe 2, so that the liquid in branch pipe 2 is cooled down, and at the same time it is used to increase the temperature in the formation workshop.

[0047] The branch pipe 1 includes a first branch pipe 12 and a second branch pipe 13. More specifically, the two ends of the first heat exchanger are connected to the first branch pipe 12 and the second branch pipe 13 respectively, and the second branch pipe 13 is also connected to the circulation main pipe 14. The first branch pipe 12 is led out from the water outlet main pipe 11, and the liquid is passed into the first liquid pipeline of the first heat exchanger 21 from the first branch pipe 12. When the first refrigerant pipeline of the first heat exchanger 21 condenses the gas refrigerant into liquid refrigerant, the heat generated is used to heat the liquid in the first liquid pipeline. After being heated, the liquid flows into the second branch pipe 13 and finally flows into the circulation main pipe 14.

[0048] The branch pipe 2 includes a third branch pipe 15 and a fourth branch pipe 16. More specifically, both ends of the second heat exchanger are connected to the third branch pipe 15 and the fourth branch pipe 16, respectively. The third branch pipe 15 is led out from the circulation main pipe 14, and the fourth branch pipe 16 is merged into the outlet branch pipe 11. The heated liquid flows from the circulation main pipe 14 into the third branch pipe 15, and then flows into the second liquid pipeline of the second heat exchanger 31. When the second refrigerant pipeline of the second heat exchanger 31 vaporizes the liquid refrigerant into gas refrigerant, the liquid temperature in the second liquid pipeline is absorbed, and the cooled liquid is merged into the outlet main pipe 11 through the fourth branch pipe 16.

[0049] The initial temperature of the liquid flowing from the outlet pipe 11 into the first liquid pipeline is about 15°C. After being heated, the temperature of the liquid when it flows into the circulation pipe 14 is about 20°C, which is the same as the temperature of the liquid flowing into the third branch pipe 15 from the circulation pipe 14; after the liquid is cooled, it is merged into the outlet pipe 11 through the fourth branch pipe 16, and the liquid temperature is about 15°C at this time. That is, after the liquid passes through the injection workshop and the formation workshop, the cooling capacity provided by the outlet pipe 11 can remain roughly unchanged, and the liquid returns to the inlet pipe 17. The waste heat generated by the refrigeration unit of the injection workshop is fully utilized in the heating unit of the formation workshop, which improves the energy utilization rate of the production process and achieves the purpose of energy saving and consumption reduction.

[0050] The first refrigerant cycle unit includes a first throttle valve 22 , a first evaporator 23 , a first compressor 24 , and a first four-way reversing device 25 .

[0051] The working principle of the refrigeration unit is as follows: the first compressor 24 passes the high-temperature and high-pressure gas refrigerant into the first refrigerant pipeline, the first refrigerant pipeline condenses the high-temperature and high-pressure gas refrigerant into a high-pressure liquid refrigerant and then passes it into the first throttle valve 22, the first throttle valve 22 reduces the pressure and throttles the condensed high-pressure liquid refrigerant and then passes it into the first evaporator 23, the first evaporator 23 is connected to the first circulating fan box 3 as the surface cooling function section of the first circulating fan box 3, and the first evaporator 23 takes away the heat of the air blown into the first circulating fan box 3 during the process of evaporating the liquid refrigerant into a gas refrigerant, thereby achieving cooling of the liquid injection workshop.

[0052] More specifically, the first refrigerant pipeline, the first throttle valve 22, the first evaporator 23, the first compressor 24, and the first four-way reversing device 25 are connected in series. That is, the outlet of the first refrigerant pipeline is connected to the inlet of the first throttle valve 22, the outlet of the first throttle valve 22 is connected to the inlet of the first evaporator 23, the outlet of the first evaporator 23 is connected to the inlet of the first compressor 24 through one flow direction of the first four-way reversing device 25, and the outlet of the first compressor 24 is connected to the inlet of the first refrigerant pipeline through another flow direction of the first four-way reversing device 25.

[0053] The second refrigerant cycle unit includes a second throttle valve 32 , a second condenser 33 , a second compressor 34 , and a second four-way reverser 35 .

[0054] The working principle of the heating unit is as follows: the second compressor 34 passes the high-temperature and high-pressure gas refrigerant into the second condenser 33, and the second condenser 33 is connected to the second circulating air box 4 as the surface heating functional section of the second circulating air box 4. The heat generated during the second condenser 33 condenses the high-temperature and high-pressure gas refrigerant into high-pressure liquid refrigerant is used to heat the air blown into the second circulating air box 4, thereby increasing the temperature of the formation workshop.

[0055] The second throttle valve 32 reduces the pressure and throttles the condensed high-pressure liquid refrigerant and then passes it into the second heat exchanger 31. During the process of evaporating the liquid refrigerant into gaseous refrigerant in the second refrigerant pipeline of the second heat exchanger 31, the heat of the liquid flowing into the second liquid pipeline from the third branch pipe 15 is absorbed. The liquid flowing in the second liquid pipeline is the liquid heated by the first liquid pipeline. The initial temperature of the liquid flowing into the second liquid pipeline is 20°C. After being cooled, the liquid in the second liquid pipeline flows out of the fourth branch pipe 16 and finally merges into the water outlet main pipe 11. The temperature of the liquid entering the water outlet main pipe 11 is 15°C.

[0056] More specifically, the second refrigerant pipeline, the second throttle valve 32, the second condenser 33, the second compressor 34, and the second four-way reversing device 35 are connected in series. That is, the outlet of the second compressor 34 is connected to the inlet of the second condenser 33 through the second four-way reversing device 35 in one flow direction, the outlet of the second condenser 33 is connected to the inlet of the second throttle valve 32, the outlet of the second throttle valve 32 is connected to the inlet of the second refrigerant pipeline, and the outlet of the second refrigerant pipeline is connected to the inlet of the second compressor 34 through the second four-way reversing device 35 in another flow direction.

[0057] The first branch pipe 12 and the second branch pipe 13 are both provided with a first opening and closing valve 26, which is used to open and close the first liquid pipeline of the first heat exchanger 21. Similarly, the third branch pipe 15 and the fourth branch pipe 16 are both provided with a second opening and closing valve 36, which is used to open and close the second liquid pipeline of the second heat exchanger 31.

[0058] When the temperature of the liquid in the circulation main pipe 14 is too high, one or more of the first on-off valves 26 can be closed. Similarly, when the temperature of the liquid in a certain section of the outlet water main pipe 11 in the formation workshop is too low, one or more of the second on-off valves 36 can be closed.

[0059] In other words, when the liquid in the circulation main pipe 14 is introduced into the third branch pipe 15, the liquid temperature is preferably maintained at about 20°C, and when the liquid in the fourth branch pipe 16 is merged into the water outlet main pipe 11, the liquid temperature is preferably maintained at about 15°C.

[0060] The liquid injection workshop is provided with a first temperature sensor 5. When the temperature of the liquid injection workshop is higher than the set value of the first temperature sensor 5, the number of refrigeration units in the liquid injection workshop is increased. The chemical formation workshop is provided with a second temperature sensor 6. When the temperature of the chemical formation workshop is lower than the set value of the second temperature sensor 6, the number of heating units in the chemical formation workshop is increased.

[0061] The above schematically describes the present invention and its implementation methods, which are not restrictive. The drawings show only one implementation method of the present invention, and the actual structure is not limited thereto. Therefore, if ordinary technicians in this field are inspired by it and design structural methods and embodiments similar to the technical solution without creativity without departing from the purpose of the present invention, they should all fall within the protection scope of the present invention.

Claims

1. A temperature control device for battery filling and formation workshop, characterized in that: include: A medium temperature water system (1), wherein the medium temperature water system (1) comprises a water outlet main (11); Refrigeration units, the number of which is no less than two and which are arranged in the liquid injection workshop, the refrigeration units being connected to the water outlet main pipe (11) and the circulation main pipe (14) via branch pipe 1, the refrigeration units being used to exchange heat with the liquid in branch pipe 1, thereby raising the temperature of the liquid in branch pipe 1 and lowering the temperature in the liquid injection workshop; A heating unit, which has no less than two and is arranged in a chemical formation workshop, is connected to a circulation main pipe (14) and a water outlet main pipe (11) through a second branch pipe, and is used for exchanging heat with the liquid in the second branch pipe, so as to cool the liquid in the second branch pipe and increase the temperature in the chemical formation workshop.

2. A temperature control device for battery filling and formation workshop according to claim 1, characterized in that: The refrigeration unit comprises a first heat exchanger (21) and a first refrigerant circulation unit connected to the first heat exchanger (21); the first heat exchanger (21) is used to perform heat exchange between the refrigerant introduced into the first refrigerant circulation unit and the liquid in branch pipe 1, and the first refrigerant circulation unit is used to perform heat exchange between the refrigerant discharged from the first heat exchanger (21) and the air in the liquid injection workshop.

3. The temperature control device for battery filling and formation workshop according to claim 2, characterized in that: The first heat exchanger (21) comprises a first refrigerant pipeline and a first liquid pipeline which are independent of each other; the branch pipe 1 comprises a first branch pipe (12) and a second branch pipe (13) which are respectively connected to two ends of the first heat exchanger (21), and the second branch pipe (13) is simultaneously connected to a circulation main pipe (14); the first branch pipe (12) is led out from a water outlet main pipe (11), and liquid is introduced into the first liquid pipeline from the first branch pipe (12); the first heat exchanger (21) is used to condense gaseous refrigerant into liquid refrigerant, and the heat generated is used to heat the liquid in the first liquid pipeline; the second branch pipe (13) is used to collect the heated liquid into the circulation main pipe (14).

4. The temperature control device for battery filling and formation workshop according to claim 2, characterized in that: The first refrigerant cycle unit comprises: A first throttle valve (22), the inlet of which is connected to the first heat exchanger (21), and the first throttle valve (22) is used to reduce the pressure and throttle the condensed liquid refrigerant; a first evaporator (23), the inlet of the first evaporator (23) being connected to the outlet of the first throttle valve (22); the first evaporator (23) is used to evaporate the liquid refrigerant discharged from the first heat exchanger (21) into gaseous refrigerant at a low pressure, and at the same time absorb the heat of the air blown in by the first circulating fan box (3); A first compressor (24), wherein a first four-way reversing device (25) is used to connect the outlet of the first compressor (24) to the first heat exchanger (21), and the first four-way reversing device (25) is also used to connect the inlet of the first compressor (24) to the outlet of the first evaporator (23); The first heat exchanger (21), the first throttle valve (22), the first evaporator (23), the first compressor (24) and the first four-way reversing device (25) are connected in series.

5. The temperature control device for battery filling and formation workshop according to claim 4, characterized in that: The first circulating fan box (3) is used for circulating the air in the liquid injection workshop; the first evaporator (23) is connected to the first circulating fan box (3) as a surface cooling function section of the first circulating fan box (3).

6. The temperature control device for battery filling and formation workshop according to claim 2, characterized in that: The heating unit comprises a second heat exchanger (31) and a second refrigerant circulation unit connected to the second heat exchanger (31); the second heat exchanger (31) is used to perform heat exchange between the refrigerant introduced into the second refrigerant circulation unit and the liquid in the second branch pipe, and the second refrigerant circulation unit is used to perform heat exchange between the refrigerant discharged from the second heat exchanger (31) and the air in the formation workshop.

7. The temperature control device for battery filling and formation workshop according to claim 6, characterized in that: The second heat exchanger (31) comprises a second refrigerant pipeline and a second liquid pipeline which are independent of each other; the branch pipe 2 comprises a third branch pipe (15) and a fourth branch pipe (16) which are respectively connected to two ends of the second heat exchanger (31); the third branch pipe (15) is led out from the circulation main pipe (14), and the fourth branch pipe (16) is merged into the water outlet main pipe (11); the heated liquid is passed into the second liquid pipeline through the third branch pipe (15), and the second heat exchanger (31) is used to vaporize the liquid refrigerant into gaseous refrigerant and absorb the heat of the liquid in the second liquid pipeline; the fourth branch pipe (16) is used to merge the cooled liquid into the water outlet main pipe (11).

8. The temperature control device for battery filling and formation workshop according to claim 6, characterized in that: The second refrigerant cycle unit comprises: A second throttle valve (32), the outlet of the second throttle valve (32) being connected to the second heat exchanger (31), and the second throttle valve (32) being used to reduce the pressure and throttle the condensed liquid refrigerant; a second condenser (33), the outlet of the second condenser (33) being connected to the inlet of the second throttle valve (32); the second condenser (33) is used to condense the gas refrigerant discharged from the second compressor (34) into liquid refrigerant, and the heat generated is used to heat the air blown in by the second circulating fan box (4); a second compressor (34), wherein a second four-way reversing device (35) is used to connect the outlet of the second compressor (34) to the second condenser (33), and the second four-way reversing device (35) is also used to connect the inlet of the second compressor (34) to the second heat exchanger (31); The second heat exchanger (31), the second throttle valve (32), the second condenser (33), the second compressor (34) and the second four-way reversing device (35) are connected in series.

9. The temperature control device for battery filling and formation workshop according to claim 8, characterized in that: The second circulating air box (4) is used to circulate the air in the workshop; the second condenser (33) is connected to the second circulating air box (4) as a surface heating function section of the second circulating air box (4).

10. The temperature control device for battery filling and formation workshop according to claim 1, characterized in that: The liquid injection workshop is provided with a first temperature sensor (5); and the chemical formation workshop is provided with a second temperature sensor (6).

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