CN213278191U - Heating mechanism and hot pressing equipment - Google Patents

Abstract

The embodiment of the utility model discloses heating mechanism and hot pressing equipment, this heating mechanism includes: gas heater, the heating module, gas supply line and return gas pipeline, gas heater is used for heating gas, gas supply line's both ends are connected with gas heater and heating module respectively, the heating module absorbs the gas heat through gas heater heating, and give electric core with heat transfer, return gas pipeline's both ends are connected with heating module and gas heater respectively, can be fast with gaseous heat transfer for the heating module, promote the temperature of heating module to appointed heating temperature fast, and heat electric core, can realize heating module's preheating rapidly, and the production efficiency is improved.

Description

Heating mechanism and hot pressing equipment

Technical Field

The utility model relates to a heating technology field especially relates to a heating mechanism and hot pressing equipment.

Background

The hot-pressing equipment is equipment for heating and pressurizing the battery core. The working principle is as follows: during hot pressing, the electric core is heated, so that the fluidity of electrolyte in the electric core is increased, and the cycle life of the electric core is prolonged; and during cold pressing, the shape is formed, so that the shape of the battery core is controlled.

Traditional hot pressing equipment includes heating module and drive arrangement, and drive arrangement drive heating module centre gripping electricity core to after improving the heating module temperature, heat electric core, the heating module adopts epoxy heating plate and aluminum plate resistance wire plywood heating under the general condition, and resistance wire is lower to the heating efficiency of heating module, and it is longer to lead to heating module preheating time, and hot pressing equipment's preheating time is long, influences production efficiency.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a heating mechanism and indirect heating equipment aims at solving traditional indirect heating equipment preheating time long, influences production efficiency's problem.

A heating mechanism, comprising: the gas heater is used for heating gas, two ends of the gas supply pipeline are respectively connected with the gas heater and the heating module, the heating module absorbs gas heat heated by the gas heater and transmits the heat to the battery cell, and two ends of the gas return pipeline are respectively connected with the heating module and the gas heater.

In one embodiment, the heating module includes a plurality of sets of heating elements, the air supply pipeline includes a plurality of air supply branches, the air return pipeline includes a plurality of air return branches, and the heating elements are communicated with the air supply branches and the air return branches in a one-to-one correspondence manner.

In one embodiment, the air supply pipeline further comprises an air supply main pipeline and an air supply distributor, the air supply main pipeline is communicated with the air supply branch pipelines through the air supply distributor, the air return pipeline further comprises an air return main pipeline and an air return flow concentrator, and the air return branch pipelines are communicated with the air return main pipeline through the air return flow concentrator.

In one embodiment, each group of heating assemblies comprises a plurality of heating plates, and a connecting pipe is arranged between every two adjacent heating plates and is used for communicating the adjacent heating plates.

In one embodiment, a heating pipe is arranged in each heating plate, and the heating pipe is communicated with the connecting pipe.

In one embodiment, the gas heater comprises a heating cavity and a heating element, wherein the heating element is arranged in the heating cavity and is used for heating gas in the heating cavity.

In one embodiment, a baffle plate is arranged in the heating cavity and used for guiding gas to flow in the heating cavity.

In one embodiment, the heating cavity is provided with a heat insulation layer.

In one embodiment, temperature measuring elements are disposed on the heating module and the gas heater.

The hot-pressing equipment comprises a driving device and the heating mechanism, wherein the driving device is used for driving the heating module to clamp the battery core.

Adopt the embodiment of the utility model provides a, following beneficial effect has:

adopt the utility model discloses heating mechanism, the heating module absorbs the gas heat that has heated through gas heater to give electric core with heat transfer, can be fast with gaseous heat transfer for the heating module, promote the temperature of heating module to appointed heating temperature fast, and heat electric core, can realize preheating of heating module fast.

The heating mechanism is applied to the hot-pressing equipment, the driving device is used for driving the heating module to clamp the battery cell, the heating module can be rapidly heated to a specified temperature, hot-pressing work is rapidly carried out, preheating time of the hot-pressing equipment is saved, production efficiency is improved, power of the gas heater is lower than that of the integral resistance wire of the traditional hot-pressing equipment, and energy loss of the hot-pressing equipment is reduced.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

Wherein:

FIG. 1 is a schematic view of a heating mechanism according to an embodiment.

Fig. 2 is an enlarged schematic view of a portion a of the heating mechanism shown in fig. 1.

Fig. 3 is a schematic view of a heating element in the heating mechanism shown in fig. 1.

Fig. 4 is a schematic view of a heating pipe in the heating mechanism shown in fig. 1.

Fig. 5 is a front view of the heating mechanism shown in fig. 1 applied to a hot press apparatus.

Fig. 6 is a bottom view of the hot press apparatus shown in fig. 5.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.

As shown in fig. 1, 5, and 6, the hot pressing apparatus of an embodiment is mainly used for hot pressing articles such as battery cells, and includes a frame body 600, a driving device 700, and a heating mechanism, the heating mechanism and the driving device 700 are disposed on the frame body 600, the heating mechanism includes a gas heater 100 and a heating module 200, the driving device 700 is used to drive the heating module 200 to clamp the battery cells, the heating module 200 can be rapidly heated to a specified temperature, and hot pressing is rapidly performed, so that the production efficiency is improved, and the power of the gas heater 100 is lower than the power of the integral resistance wire of the conventional hot pressing apparatus, so that the energy loss of the operation of the hot pressing apparatus is reduced.

In this embodiment, the heating mechanism further includes a gas supply pipeline 300 and a gas return pipeline 400, the gas heater 100 is used for heating gas, two ends of the gas supply pipeline 300 are respectively connected with the gas heater 100 and the heating module 200, the heating module 200 absorbs gas heat heated by the gas heater 100 and transfers the heat to the battery cell, two ends of the gas return pipeline 400 are respectively connected with the heating module 200 and the gas heater 100, the gas heater 100 is used for heating gas, the gas output speed is high, the gas heat can be quickly transferred to the heating module 200, so that the temperature of the heating module 200 is quickly raised to a specified heating temperature, the battery cell is heated, and the preheating time of the heating module 200 is saved.

Please combine fig. 2 together, the heating module 200 includes a plurality of sets of heating elements 210, the air supply pipeline 300 includes a plurality of air supply branches 310, the air return pipeline 400 includes a plurality of air return branches 410, the heating elements 210 are all communicated with the air supply branches 310 and the air return branches 410 in a one-to-one correspondence manner, the heating module 200 is split into a plurality of heating modules, efficient flowing of air in each heating element 210 can be realized, the circulation efficiency of air is high, it is not low due to poor circulation efficiency, the heating temperature of the plate layer of the heating module 200 is inconsistent, and the temperature distribution of part of the heating module 200 is uneven, thereby affecting the thermal compression effect. The air supply pipeline 300 and the air return pipeline 400 are provided with heat insulation materials for heat insulation, so that heat loss in the gas conveying process is prevented. And the gas can be recycled, and the energy loss is greatly reduced.

In the present embodiment, the gas supply line 300 further includes a gas supply main line 320 and a gas supply distributor 330, the gas supply main line 320 communicates with the plurality of gas supply branches 310 through the gas supply distributor 330, the gas return line 400 further includes a gas return main line 420 and a gas return flow collector 430, and the plurality of gas return branches 410 communicate with the gas return main line 420 through the gas return flow collector 430, so that the gas can be collected or dispersedly conveyed.

Specifically, one end of the main gas supply pipeline 320 is communicated with the gas outlet end of the gas heater 100, the other end of the main gas supply pipeline is respectively communicated with the plurality of gas supply branches 310 through the gas supply distributor 330, the gas is uniformly distributed in each gas supply branch 310 through the gas supply distributor 330, the gas output by the gas heater 100 can be partially split into two parts in the gas supply pipeline 300, one part of the gas can be intensively conveyed in the main gas supply pipeline 320, the heat preservation of the main gas supply pipeline 320 is facilitated, the heat loss in the conveying process is further reduced, one part of the gas can be conveyed in the plurality of gas supply branches 310, the gas can be uniformly distributed to the plurality of groups of heating assemblies 210, and the heating of the heating assemblies 210 can be rapidly realized.

One end of the air return main pipeline 420 is communicated with the air inlet end of the air heater 100, the other end of the air return main pipeline is respectively communicated with the plurality of air return branches 410 through the air return current collector 430, the air return current collector 430 collects the air in each air return branch 410 into the air return main pipeline 420, the air conveyed by the heating module 200 to the air heater 100 can be partially split into two parts in the air return pipeline 400, one part is conveyed in the plurality of air return branches 410, the air in the plurality of heating modules 210 can be converged into the air return main pipeline 420, and the other part conveys the converged air to the air heater 100 in the air return main pipeline 420.

Please refer to fig. 3 together, each group of heating assemblies 210 includes a plurality of heating plates 211, a connecting pipe 212 is disposed between adjacent heating plates 211, and the connecting pipe 212 is used to communicate with adjacent heating plates 211, so that the gas is transported between adjacent heating plates 211, and the circulation of the gas in the heating assemblies 210 can be realized, so as to rapidly increase the heating temperature of the heating plates 211, and the heating plates 211 are used to heat the battery cells. Preferably, both ends of every hot plate 211 are equipped with a connecting port respectively, after a plurality of hot plates 211 are arranged according to the order, adopt connecting pipe 212 to connect adjacent hot plate 211, can make gas in every hot plate 211, carry to the other end from the one end of hot plate 211 according to the order, can realize the even heating of whole hot plate 211 sheet layer, it is better even to the heating effect of electric core, electric core is lithium ion battery electricity core, increase the mobility of electrolyte, make electrolyte viscosity higher, electrolyte obtains abundant infiltration, form compact SEI membrane easily, increase electric core cycle life, improve the uniformity of electric core performance, become the electric core performance of technology with the improvement heating pressurization.

Please combine fig. 4 together, be provided with heating pipe 213 in every heating plate 211, heating pipe 213 communicates with connecting pipe 212, it has gas to carry in the heating pipe 213, heating pipe 213 can be the S-shaped pipe, gas flows in the S-shaped pipe, the S-shaped pipe equipartition is in heating plate 211, and cover the higher area of heating plate 211, can make heating plate 211 be heated better even, it is better to the heating effect of electric core, gaseous heat-conduction to heating plate 211' S sheet layer surface in the heating pipe 213, make the homogeneity of heating plate 211 inter-sheet temperature better. Preferably, the heating pipe 213 is a round pipe and is distributed in a serpentine shape in the heating plate 211 to facilitate gas transmission. Of course, in other embodiments, the heating pipe 213 may be a square pipe or other pipe, and a square pipe is used for the purpose of transporting the gas in the heating plate 211 and absorbing the heat of the gas.

In this embodiment, the gas heater 100 comprises a heating cavity 110 and a heating element 120, the heating element 120 is disposed in the heating cavity 110, an inlet end and an outlet end are respectively disposed at two ends of the heating cavity 110, gas is delivered from the inlet end of the heating cavity 110 to the outlet end of the heating cavity 110, the heating cavity 110 and the heating element extend along a delivery direction of the gas, and the heating element 120 is used for heating the gas in the heating cavity 110, so as to heat the gas by the gas heater 100. Preferably, the heating element 120 is a stainless steel electric heating tube, which can rapidly heat the gas. Of course, in other embodiments, the gas heater 100 may be other heating devices, such as a boiler for heating the gas in the heating chamber.

In this embodiment, a flow guiding plate 130 is disposed in the heating cavity 110, the flow guiding plate 130 is used for guiding the gas to flow in the heating cavity 110, so as to improve the heating time of the gas in the heating cavity 110, and the flow guiding plate 130 is used for guiding the gas to move in the heating cavity according to a specified path, so as to increase the heating time of the gas, and to realize uniform heating of the gas, so as to make the temperature of the gas relatively constant.

Preferably, the guide plate 130 is provided in plural to preferably realize the path guiding of the gas, so that the gas is uniformly heated and the heat exchange efficiency of the heating element 120 and the gas is improved. Specifically, the plurality of flow guiding plates 130 are arranged at intervals in the gas conveying direction, and the flow guiding plates 130 are provided with guiding surfaces perpendicular to the gas conveying direction for blocking the gas from being conveyed too fast. Of course, in other embodiments, the heating chamber 110 may be designed to form a longer heating channel, so as to omit the baffle 130 and ensure the heating effect of the gas.

In this embodiment, magnesium aluminum oxide with good insulation and heat conduction performance is disposed inside the heating cavity 110, and silica gel ceramics are sealed at the air outlet end and the air inlet end of the gas heater 100 to reduce energy loss.

In this embodiment, the heat insulating layer 140 is disposed on the heating cavity 110, and the heat insulating layer 140 is used to insulate the gas in the heating wall 110, so as to reduce the heat loss of the gas and save energy. Preferably, the insulating layer 140 is disposed outside the heating chamber 110, and the insulating layer 140 is filled with a refractory insulating material.

In this embodiment, the bottom of the heating chamber 110 is provided with a support 111 for supporting the heating chamber 110 to mount the heating chamber 110, the heating element 120 protrudes from the end of the heating chamber 110, and a shield 112 is closed at the end of the heating chamber 110 to prevent the mounting side of the heating element 120 from being dangerous after the gas is rapidly heated, and the shield 112 is provided with a terminal 113 for safe connection of the circuit.

In the present embodiment, the temperature measuring element 500 is provided on the heating module 200 and the gas heater 100, and the temperature is measured by the temperature measuring element 500 to control the gas output temperature of the gas heater 100 and the heating temperature of the heating module 200. Preferably, the temperature measuring element 500 includes a first temperature measuring element 510, a second temperature measuring element 520 and a third temperature measuring element 530, the first temperature measuring element 510 is disposed inside the gas heater 100 and is used for detecting the temperature inside the gas heater 100, the second temperature measuring element 520 is disposed at the gas outlet end of the gas heater 100 and is used for detecting the temperature of the gas output by the gas heater 100, and the third temperature measuring element 530 is disposed on the heating plate 211 and is used for detecting the temperature of the heating plate 211 so as to monitor the temperature of the heating mechanism. Of course, in other embodiments, the temperature measuring element 500 may also include a fourth temperature measuring element or others, the fourth temperature measuring element is disposed at the air inlet end of the gas heater 100 and is used for detecting the temperature of the gas conveyed back to the gas heater 100, and the temperature measuring element 500 is disposed for detecting the temperature of each part of the heating mechanism to monitor the temperature.

Specifically, the first temperature measuring element 510 is connected to the plurality of flow guiding plates 130, so as to detect the temperatures on the flow guiding plates 130 and in the heating chamber 110, and the first temperature measuring element 510 extends along the conveying direction of the gas in the heating chamber 110, so as to accurately detect the temperatures at various positions. A third temperature measuring element 530 is arranged on each heating plate 211, and the third temperature measuring element 530 is arranged in the middle of the heating plate 211 to ensure the stability and accuracy of temperature measurement and realize the detection of the overall temperature of the heating module 200.

In this embodiment, the hot pressing device further includes a temperature control module, which can be used to precisely adjust the temperature of each position in the heating mechanism, and cooperate with the temperature measuring element 500 to control the temperature of the hot pressing device.

Adopt the utility model discloses heating mechanism, heating module 200 from normal atmospheric temperature (23 ℃ -27 ℃) heat to more than 75 ℃, can accomplish fast within 35 minutes, and is preferred, can accomplish preheating of heating module within 20 minutes to realize hot pressing equipment's hot pressing work.

Compared with the traditional heating mechanism adopting water and oil as heating media, the heating mechanism adopts gas as the heating media, the temperature of the gas is increased more quickly, and heat can be supplied to the heating module 200 more quickly, so that the requirement of quick heating is met, and the preheating time of hot-pressing equipment is shortened. Preferably, the heating of air energy is realized, the gas mainly adopts nitrogen and hydrogen, the gas medium is convenient to obtain, and the price is low. The mechanical property of the gas medium is good, the heating medium is non-conductive, non-combustible, non-explosive, non-chemical corrosive, non-pollution, safe and reliable, the temperature of the heated space is fast, and the gas can be controlled, clean and small.

Adopt the hot pressing of epoxy heating plate and aluminum plate resistance wire plywood heating to become equipment with the tradition and compare, the utility model discloses heating mechanism's heating power is lower, the energy can be saved. The traditional hot-pressing equipment adopts a plurality of heating aluminum plates, wherein the power of a single heating aluminum plate is 6250W, two aluminum plates can form a channel, generally the channel is formed by 24 or 36 channels, and therefore, the energy requirement is large when the plate layer is heated.

Adopt the utility model discloses heating mechanism, gaseous medium price cost is low, and thermal conductivity is good, and is with low costs more than 1.5 times than other epoxy, resistance wire and oil, and water and oil are considered from product safety (leak easily and cause the pollution to electric core outward appearance) and are got rid of, and epoxy and resistance wire heating fragile, the comprehensive consideration gas heating more has the cost and can produce property ability advantage.

The above disclosure is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the scope of the invention, which is defined by the appended claims.

Claims (10)

1. A heating mechanism, comprising: the gas heater is used for heating gas, two ends of the gas supply pipeline are respectively connected with the gas heater and the heating module, the heating module absorbs gas heat heated by the gas heater and transmits the heat to the battery cell, and two ends of the gas return pipeline are respectively connected with the heating module and the gas heater.

2. The heating mechanism of claim 1, wherein the heating module comprises a plurality of sets of heating elements, the gas supply pipeline comprises a plurality of gas supply branches, the gas return pipeline comprises a plurality of gas return branches, and the heating elements are in one-to-one communication with the gas supply branches and the gas return branches.

3. The heating mechanism according to claim 2, wherein the air supply pipeline further comprises an air supply main pipeline and an air supply distributor, the air supply main pipeline is communicated with the plurality of air supply branches through the air supply distributor, the air return pipeline further comprises an air return main pipeline and an air return flow concentrator, and the plurality of air return branches are communicated with the air return main pipeline through the air return flow concentrator.

4. The heating mechanism of claim 2, wherein each group of heating assemblies comprises a plurality of heating plates, and a connecting pipe is arranged between adjacent heating plates and is used for communicating adjacent heating plates.

5. The heating mechanism of claim 4, wherein a heating tube is disposed within each heating plate, the heating tube being in communication with the connecting tube.

6. The heating mechanism of claim 1, wherein said gas heater comprises a heating chamber and a heating element disposed within said heating chamber, said heating element for heating gas within said heating chamber.

7. A heating mechanism according to claim 6, wherein a baffle is provided within the heating chamber for directing gas flow within the heating chamber.

8. A heating mechanism according to claim 6, wherein the heating chamber is provided with an insulating layer.

9. The heating mechanism of claim 1, wherein temperature measuring elements are disposed on the heating module and the gas heater.

10. A hot-pressing apparatus, comprising a driving device and the heating mechanism of any one of claims 1 to 9, wherein the driving device is configured to drive the heating module to clamp the battery cell.

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