High-safety soft package battery cell clamp with fire extinguishing function

Abstract

The utility model relates to a high-safety soft package battery cell clamp with a fire extinguishing function, and belongs to the technical field of soft package lithium battery production. The soft package battery cell clamp comprises two same clamping plates and a plurality of thermosensitive pieces, the two clamping plates are symmetrically arranged and are used for clamping a soft package battery cell and applying pressure to the soft package battery cell; a cavity is formed in the clamping plate, and the cavity is filled with a fire extinguishing agent; a plurality of through holes are formed in the sides, facing each other, of the two clamping plates, and the through holes communicate with the cavity; the through hole is blocked by the thermosensitive part, and the thermosensitive part is set to be shrunk or broken when the soft package battery cell is subjected to thermal runaway, so that the fire extinguishing agent in the cavity is sprayed to the soft package battery cell. According to the soft package battery cell clamp disclosed by the utility model, a fire extinguishing agent can be sprayed to the soft package battery cell when the soft package battery cell is subjected to thermal runaway, so that dangerous cases are effectively prevented; meanwhile, the pressure borne by the soft package battery cell can be always kept consistent in the testing process.

Description

TECHNICAL FIELD

[0001] The utility model relates to soft pack lithium battery production technical field especially relates to a high safety soft package electric core clamp with fire extinguishing function. BACKGROUND

[0002] The soft pack lithium ion battery is often accompanied by the expansion and shrinkage of pole piece in the process of charging and discharging, in order to avoid the problems such as battery structure damage, lithium precipitation and gas production caused by the expansion and shrinkage, in the process of testing the battery soft pack electric core, it is usually necessary to apply certain pressure to the soft pack lithium ion battery electric core through the clamp to control the size change of the electric core and prevent the electric core from excessive deformation in the testing process.

[0003] However, when the soft pack electric core is out of control due to various reasons, it is easy to cause the fire to be not detected in time due to the existence of the outer clamp of the soft pack electric core, thereby causing greater danger. SUMMARY

[0004] In view of the above analysis, the utility model embodiment aims at providing a high safety soft pack electric core clamp with fire extinguishing function, which aims at putting out the fire in time when the soft pack electric core is out of control, to solve the problem that the existing clamp is not easy to find the electric core out of control and cause danger when clamping the soft pack electric core for testing.

[0005] The utility model embodiment provides a high safety soft pack electric core clamp with fire extinguishing function, comprising: two identical clamping plates and a plurality of thermal elements; the two clamping plates are symmetrically arranged and used for clamping the soft pack electric core and applying pressure to the soft pack electric core; a cavity is formed in the inside of the clamping plate, and the cavity is filled with fire extinguishing agent; a plurality of through holes are formed on the side of the two clamping plates facing each other, and the through holes are communicated with the cavity; the thermal element is blocked in the through hole, and the thermal element is arranged to shrink and deform or break when the soft pack electric core is out of control, so that the fire extinguishing agent in the cavity is sprayed to the soft pack electric core.

[0006] Further, the thermal element is a thermal insert, which is detachably arranged in the through hole and used for blocking the through hole.

[0007] Further, the inner wall of the through hole is formed with internal threads, and the thermal insert is formed with external threads, and the thermal insert is screwed in the through hole.

[0008] Further, the thermal element is a thermal layer covering the through hole.

[0009] Further, the cavity is also filled with inert gas, which is used for providing pressure for the spraying of the fire extinguishing agent and suppressing the fire at the same time.

[0010] Further, the side of the clamping plate perpendicular to the surface of the through hole is also formed with a filling channel, and the filling channel is communicated with the cavity and used for filling the fire extinguishing agent or inert gas into the cavity.

[0011] Further, the filling channel is provided with a quick connector arranged to be in an open state when connected with an external pipeline and in a closed state when disconnected with the external pipeline.

[0012] Further, the plurality of through holes are evenly distributed in an array on the clamping plate.

[0013] Further, the surface of the clamping plate is provided with an insulating layer.

[0014] Further, the soft-pack battery cell clamp further comprises a fastener; the clamping plate is formed with a plurality of connecting holes, the plurality of connecting holes are located around the cavity and are arranged at intervals in the cavity; and the fastener is connected in the corresponding connecting holes of the two clamping plates.

[0015] The utility model at least can realize following beneficial effect one:

[0016] 1, adopt the soft-pack battery cell clamp of the utility model, clamp the soft-pack battery cell between two clamping plates, thereby exert pressure to the soft-pack battery cell. When the soft-pack battery cell has thermal runaway, the thermal sensitive piece contracts and deforms or breaks due to heat, so that the cavity in the clamping plate is communicated with the outside, so that the fire extinguishing agent in the cavity can be sprayed out through the through hole and sprayed to the soft-pack battery cell, so as to achieve the fire extinguishing effect, which can effectively prevent more serious danger and improve the safety of the battery cell test process.

[0017] 2, the soft-pack battery cell clamp of the utility model is communicated with the outside through the plurality of through holes by setting the closed cavity and setting the thermal sensitive piece at the through hole to realize the plugging of the through hole. In the test process, the thermal sensitive piece does not affect the pressure exerted by the clamping plate on the soft-pack battery cell, which can ensure that the pressure on the soft-pack battery cell remains consistent during the test process.

[0018] 3, the utility model can replace the thermal sensitive insert after the thermal sensitive insert is deformed due to thermal runaway by setting the detachable thermal sensitive insert in the through hole, which realizes the recycling of the clamp and improves the service life of the clamp.

[0019] 4, the utility model fills the inert gas in the cavity, which can pressurize the gas in the cavity on the one hand, which helps the spraying of the fire extinguishing agent. On the other hand, the inert gas is also conducive to suppressing the fire and improving the fire extinguishing effect.

[0020] In the utility model, the above technical solutions can be combined with each other to realize more preferred combination solutions. Other features and advantages of the utility model will be described in the subsequent specification, and some advantages can become apparent from the specification or be understood by implementing the utility model. The purpose and other advantages of the utility model can be realized and obtained through the content specifically pointed out in the specification and the drawings. BRIEF DESCRIPTION OF DRAWINGS

[0021] The accompanying drawings are included to provide a further understanding of the embodiments and are incorporated in and constitute a part of this specification, illustrate embodiments of the present application and together with the description serve to explain the principles of the present application. In the drawings:

[0022] Figure 1 Structure diagram of soft package battery cell clamp according to some embodiments of the present application.

[0023] Figure 2 Side view of soft package battery cell clamp according to some embodiments of the present application.

[0024] Figure 3 Top view of clamping plate in soft package battery cell clamp according to some embodiments of the present application.

[0025] Legend of reference signs:

[0026] 1, clamping plate; 2, cavity; 3, through hole; 4, thermal sensitive piece; 5, connecting hole; 6, feeding channel; 7, gas feeding channel. DETAILED DESCRIPTION

[0027] In order to make the objects, technical solutions and advantages of the present application clearer, the exemplary embodiments of the present application will be described in the following with reference to the drawings. It should be understood that the specific embodiments described herein are merely intended to explain the present application and not to limit the present application. In the specification, all features of the actual implementation are not described for the sake of clarity and conciseness.

[0028] It should also be noted here that, in order to avoid obscuring the present application due to unnecessary details, only the device structures and / or processing steps closely related to the solutions according to the present application are shown in the drawings, and other details not closely related to the present application are omitted.

[0029] Embodiments of the present application provide a high-safety soft package battery cell clamp with fire extinguishing function, as shown in Figure 1 The high-safety soft package battery cell clamp with fire extinguishing function includes two identical clamping plates 1 and a plurality of thermal sensitive pieces 4. The two clamping plates 1 are symmetrically arranged and used for clamping and applying pressure to the soft package battery cell. The clamping plate 1 has a cavity 2 formed inside, and the cavity 2 is filled with fire extinguishing agent. As shown in Figure 1 and Figure 2 The two clamping plates 1 respectively form a plurality of through holes 3 on the side facing each other, and the through holes 3 are in communication with the cavity 2. The thermal sensitive piece 4 is plugged in the through hole 3, and the thermal sensitive piece 4 is arranged to shrink and deform or break when the soft package battery cell is in thermal runaway, so that the cavity 2 is in communication with the outside through the through hole 3, and the fire extinguishing agent in the cavity 2 is sprayed to the soft package battery cell.

[0030] The soft package battery cell clamp of the embodiment is used to clamp the soft package battery cell between the two clamping plates 1, so as to apply pressure to the soft package battery cell. When the soft package battery cell is in thermal runaway, the heat-sensitive part 4 is deformed or broken due to heat, so that the internal cavity 2 of the clamping plate 1 is communicated with the outside, so that the fire extinguishing agent in the cavity 2 can be sprayed out through the through hole 3 and sprayed to the soft package battery cell, so as to achieve the effect of extinguishing fire and effectively prevent more serious accidents.

[0031] In some embodiments, the heat-sensitive part 4 is deformed when the temperature exceeds 100℃, avoiding deformation of the heat-sensitive part 4 due to normal temperature rise during the test of the soft package battery cell.

[0032] In the normal state, the heat-sensitive part 4 does not deform, and at the same time, due to the size of the through hole being much smaller than the size of the clamping plate, the heat-sensitive part 4 does not affect the pressure applied by the clamping plate 1 to the soft package battery cell, so that the pressure applied to the soft package battery cell during the test is consistent.

[0033] In some existing battery clamps, the cavity filled with fire extinguishing agent is in an open form and is sealed with a plastic film. However, the clamp with such a structure may not be able to pressurize the battery cell due to the flexible material of the plastic film. When the soft package battery cell expands, the flexible film will deform, losing the significance of pressurizing the battery cell, and the pressure applied to the soft package battery cell during the test cannot be guaranteed to be consistent.

[0034] Compared with the clamp with the above structure, the soft package battery cell clamp of the utility model realizes the communication between the cavity and the outside through the plurality of through holes and realizes the plugging of the through hole by arranging the heat-sensitive part at the through hole. During the test, the heat-sensitive part does not affect the pressure applied by the clamping plate to the soft package battery cell, so that the pressure applied to the soft package battery cell during the test is consistent.

[0035] In some embodiments, the heat-sensitive part 4 is a heat-sensitive insert, which is detachably arranged in the through hole 3 and used to plug the through hole 3. When the soft package battery cell is in thermal runaway, the heat-sensitive insert is deformed, so that a gap is formed between the heat-sensitive insert and the through hole 3, the cavity 2 is communicated with the outside, and the fire extinguishing agent in the cavity 2 is sprayed to the soft package battery cell for extinguishing fire. In this embodiment, the heat-sensitive insert can be replaced after deformation caused by thermal runaway, compared with the disposable clamp with large consumption. The clamp of the utility model can be recycled by replacing the heat-sensitive part, improving the utilization rate of the clamp.

[0036] In some embodiments, the thermal sensitive insert can be screwed into the through hole 3; specifically, the inner wall of the through hole 3 is formed with internal threads, and the thermal sensitive insert is formed with external threads matched with the internal threads, and the thermal sensitive insert is screwed into the through hole 3, and the installation and removal of the thermal sensitive insert in the through hole 3 can be achieved by screwing the thermal sensitive insert. For example, the thermal sensitive insert can be a screw, a stud or the like.

[0037] Alternatively, the thermal sensitive insert can also be directly inserted into the through hole 3 and transitionally fitted with the through hole 3, so as to achieve the plugging of the through hole 3.

[0038] In some embodiments, the end surface of the thermal sensitive insert is flush with the surface of the clamping plate 1, so as to avoid the thermal sensitive insert protruding from the surface of the clamping plate 1 and affecting the soft pack battery cell.

[0039] In some embodiments, as shown in Figure 1 and Figure 3 , the thermal sensitive member 4 is a thermal sensitive layer, and the thermal sensitive layer covers the through hole 3. When the soft pack battery cell occurs thermal runaway, the thermal sensitive layer deforms and ruptures, so that the cavity 2 is in communication with the outside, and the fire extinguishing agent in the cavity 2 is sprayed to the soft pack battery cell, so as to achieve fire extinguishing. Specifically, each thermal sensitive layer can be connected to the surface of the clamping plate 1 by pasting and cover each through hole 3, and after the thermal sensitive layer deforms and ruptures, a new thermal sensitive layer can be replaced by pasting.

[0040] In some embodiments, the material of the thermal sensitive member 4 can be any one of polyethylene (PE), polyolefin (PO), ethylene-vinyl acetate copolymer (EVA), polyvinyl chloride (PVC) and polyethylene terephthalate (PET).

[0041] In some embodiments, the cavity 2 is also filled with inert gas, which is used to provide pressure for the spraying of the fire extinguishing agent and to suppress the fire. By filling the cavity with inert gas, on the one hand, the gas can be pressurized in the cavity, which is helpful for the spraying of the fire extinguishing agent, and on the other hand, the inert gas is also conducive to suppressing the fire and improving the fire extinguishing effect. The inert gas includes at least one of nitrogen, argon and carbon dioxide.

[0042] In some embodiments, in order to realize the filling and supplementing of the fire extinguishing agent and / or inert gas in the closed cavity, the side surface of the clamping plate 1 perpendicular to the surface where the through hole 3 is located is also formed with a filling channel, and the filling channel is in communication with the cavity 2 and is used to fill the fire extinguishing agent and / or inert gas into the cavity 2. The clamping plate 1 can be provided with one filling channel, and the fire extinguishing agent and inert gas can be filled into the cavity through one filling channel; or the clamping plate 1 can be provided with two filling channels, including a filling channel and a gas filling channel, and the fire extinguishing agent and inert gas are filled through the two filling channels respectively.

[0043] As shown in Figure 1 and Figure 2As shown, the side of the clamping plate 1 is provided with a filling channel 6, and the fire extinguishing agent can be filled into the cavity 2 through the filling channel 6. The side of the clamping plate 1 is also provided with a gas filling channel 7, and the inert gas can be filled into the cavity 2 through the gas filling channel 7.

[0044] In some embodiments, a quick connector is arranged in the filling channel, and the quick connector is arranged in an open state when connected with the external pipeline and in a closed state when disconnected with the external pipeline. By arranging the quick connector, the filling channel is in a closed state in daily use, and when it is necessary to supplement the fire extinguishing agent or the inert gas, the external pipeline for supplementing the fire extinguishing agent or the inert gas is only needed to be inserted into the quick connector, so that the communication of the filling channel is realized, and the supplement of the fire extinguishing agent or the inert gas is realized.

[0045] In some embodiments, as shown in Figure 1 and Figure 3 , a plurality of through holes 3 are uniformly distributed in an array on the clamping plate 1. By arranging a plurality of uniformly distributed through holes 3, the fire extinguishing agent in the cavity 2 can be sprayed to each position of the soft package battery cell when the soft package battery cell is in thermal runaway, and the fire extinguishing effect is improved. For example, a plurality of through holes 3 can be uniformly distributed in a rectangular array on the clamping plate 1, for example, a plurality of through holes 3 can be arranged in a rectangular array of 3x3, 3x4, 4x4, 4x5, 5x5, etc.

[0046] In some embodiments, the soft package battery cell clamp further comprises a fastener. As shown in Figures 1 to 3 , the clamping plate 1 is formed with a plurality of connecting holes 5, the connecting holes 5 penetrate through the clamping plate 1, and the plurality of connecting holes 5 are located around the cavity 2 and are arranged in a spaced manner with the cavity 2. The fastener is connected in the corresponding connecting holes 5 of the two clamping plates 1, so as to realize the connection of the two clamping plates 1 and pressurize the soft package battery cell between the two clamping plates 1. For example, the fastener comprises a bolt and a nut.

[0047] Specifically, as shown in Figures 1 to 3 , the connecting holes 5 can be arranged as 4, respectively located at the four corners of the clamping plate 1, and the upper and lower clamping plates 1 are connected by 4 fasteners, so as to realize the effect of pressurizing the battery cell.

[0048] In addition, by adjusting the fastener, the distance between the two clamping plates 1 can be adjusted, so as to adjust the pressure applied by the clamp to the soft package battery cell.

[0049] In some embodiments, the clamping plate 1 is rectangular, and the size of the clamping plate 1 can be set according to the size of the soft package battery cell. The size of the clamping plate 1 is slightly larger than the size of the soft package battery cell, so that the soft package battery cell can be clamped between the two clamping plates 1.

[0050] In some embodiments, the material of the clamping plate 1 includes but is not limited to metal materials such as stainless steel.

[0051] In some embodiments, the surface of the clamp plate 1 is provided with an insulating layer, which can cover the entire outer surface of the clamp plate 1, thereby avoiding external short circuit of the battery cell and further improving the safety of the battery cell during the test.

[0052] Before using the soft package battery cell clamp of the utility model, it is necessary to ensure that the cavity 2 is filled with fire extinguishing agent and inert gas with certain pressure. When the clamp is used to test the soft package battery cell, if thermal runaway occurs in the soft package battery cell, the heat-sensitive element 4 in the through hole 3 will shrink, and the fire extinguishing agent and inert gas in the cavity 2 will be sprayed onto the soft package battery cell through the through hole 3, effectively inhibiting the further occurrence of fire.

[0053] After the clamp extinguishes the fire of the soft package battery cell, the battery cell can be taken out and the clamp can be restored. Specifically, the heat-sensitive element 4 in the through hole 3 can be taken out and replaced with a new heat-sensitive element 4; then new fire extinguishing agent and inert gas are supplemented into the cavity through the feeding channel 6 and the gas filling channel 7 on the side of the clamp plate 1, so that the clamp can continue to be used.

[0054] The above is only a preferred specific embodiment of the utility model, but the protection scope of the utility model is not limited to this, any person skilled in the art can easily think of changes or replacements within the technical range disclosed by the utility model, which should be covered within the protection scope of the utility model.

Claims

1. A high-safety soft-pack battery cell clamp with fire extinguishing function, characterized in that, The utility model relates to a soft package battery cell heat runaway prevention device, including: Two identical clamps and a plurality of heat-sensitive components; The two clamps are symmetrically arranged to clamp and apply pressure to the soft package battery cell, and a cavity is formed in the interior of the clamp, which is filled with fire extinguishing agent; A plurality of through holes are formed on the side of the two clamps facing each other, which are in communication with the cavity; The heat-sensitive component is sealed in the through hole, and the heat-sensitive component is arranged to shrink and deform or break when the soft package battery cell experiences thermal runaway, causing the fire extinguishing agent in the cavity to be sprayed onto the soft package battery cell.

2. The high safety pouch cell gripper of claim 1, wherein, The heat-sensitive component is a heat-sensitive insert that is detachably arranged in the through hole to seal the through hole.

3. The high safety pouch cell gripper of claim 2, wherein, The inner wall of the through hole is formed with internal threads, and the heat-sensitive insert is formed with external threads, which are threadedly connected in the through hole.

4. The high safety soft pack battery cell clamp of claim 1, wherein, The heat-sensitive component is a heat-sensitive layer covering the through hole.

5. The high safety soft pack battery cell clamp of claim 1, wherein, The cavity is also filled with inert gas to provide pressure for the spraying of the fire extinguishing agent while suppressing the fire.

6. The high safety pouch cell gripper of any one of claims 1-5, wherein, The side of the clamp perpendicular to the surface of the through hole is also formed with a filling channel in communication with the cavity for filling the cavity with fire extinguishing agent or inert gas.

7. The high safety pouch cell gripper of claim 6, wherein, A quick connector is arranged in the filling channel, which is arranged to be in an open state when connected to an external pipeline and in a closed state when disconnected from the external pipeline.

8. The high safety soft pack battery cell clamp of claim 1, wherein, A plurality of through holes are uniformly distributed in an array on the clamp.

9. The high safety soft pack battery cell clamp of claim 1, wherein, An insulating layer is arranged on the surface of the clamp.

10. The high safety soft pack battery cell clamp of claim 1, wherein, Further comprising: A fastener; The clamp is formed with a plurality of connecting holes located around the cavity and arranged at intervals in the cavity; The fastener is connected to the corresponding connecting holes of the two clamps.

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