Lithium ion battery thermal runaway test electrolyte collecting device
By designing an electrolyte collection device for lithium-ion battery thermal runaway testing, the problem of incomplete electrolyte collection was solved, achieving efficient electrolyte collection and transfer, and promoting the research and application of lithium-ion batteries.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- NANJING BAUHINIA HUACHUANG TECH CO LTD
- Filing Date
- 2024-01-29
- Publication Date
- 2026-07-14
AI Technical Summary
Existing lithium-ion battery thermal runaway testing devices do not collect electrolyte completely, resulting in electrolyte loss and low collection efficiency, which affects the accuracy and efficiency of experimental results.
A lithium-ion battery thermal runaway test electrolyte collection device was designed, including a bracket, collection chamber, sealing valve port, anti-corrosion partition, battery rack support rod, battery rack, knob and baffle. Through combination arrangement and size design, the complete collection and secondary transfer of electrolyte are ensured.
It improves the collection efficiency of electrolyte, enabling the collection of all electrolyte after battery thermal runaway, reducing experimental errors, and saving time and resources.
Smart Images
Figure CN117842521B_ABST
Abstract
Description
Technical Field
[0001] This invention relates to the field of lithium-ion battery technology, and more specifically, to an electrolyte collection device for testing thermal runaway in lithium-ion batteries. Background Technology
[0002] Lithium-ion batteries are widely used in new energy vehicles and other digital products due to their advantages such as high specific energy, high output voltage, and low environmental pollution. However, due to varying usage environments, they are frequently subjected to abuse such as impacts, collisions, and overheating, which can trigger thermal runaway. Therefore, safety testing of lithium batteries is extremely important. Lithium iron phosphate batteries, due to the unique characteristics of their cathode material, will eject a large amount of unreacted electrolyte and a small amount of particulate matter during thermal runaway testing. Therefore, the collection of electrolyte is crucial for further analysis of the characteristics of thermal runaway and the composition of the products.
[0003] Existing battery testing equipment does not collect the electrolyte from thermal runaway batteries completely, resulting in some loss of electrolyte and errors in further analysis results. Moreover, the collection efficiency is low, the collection process is difficult, and it wastes a lot of time and effort, which is not conducive to the conduct of experiments.
[0004] Therefore, there is an urgent need to study a lithium battery electrolyte collection device to collect the electrolyte, thereby better promoting the research and application of lithium-ion batteries. Summary of the Invention
[0005] This specification provides an electrolyte collection device for testing thermal runaway of lithium-ion batteries, which overcomes at least one technical problem existing in related technologies.
[0006] According to embodiments of this specification, a lithium-ion battery thermal runaway test electrolyte collection device is provided, comprising a bracket, a collection chamber, a sealing valve port, a first anti-corrosion partition, a battery rack support rod, a battery rack, a knob, a baffle, and a second anti-corrosion partition, wherein...
[0007] The bracket is fixedly installed at the bottom of the device. The bracket is a hollow column with a hemispherical groove on the upper end face. The collection chamber is placed on the groove on the upper end face of the bracket. The curvature of the groove is the first value.
[0008] The collection chamber is a hemispherical shell with a second value for the curvature of the collection chamber. The first value is greater than the second value. A gap is formed between the bottom of the collection chamber and the groove of the support. A sealing valve is set at the bottom of the collection chamber and connects to the gap. A first anti-corrosion layer is provided on the inner wall of the collection chamber.
[0009] The lower end of the battery rack support rod is located inside the collection compartment and is fixedly connected to the collection compartment. The setting direction of the battery rack support rod is parallel to the central axis of the collection compartment, and multiple battery rack support rods are evenly distributed around the circumference of the collection compartment.
[0010] A battery rack, fitted onto the battery rack support rod, is used to hold the lithium-ion battery to be tested and related testing equipment;
[0011] A knob, located on the battery rack support rod, is used to adjust the up and down movement of the battery rack along the battery rack support rod;
[0012] The baffle is a hemispherical shell, which is set on the top of the battery rack support rod and fixedly connected to the battery rack support rod. The opening direction of the baffle is opposite to the opening direction of the collection chamber. The battery rack support rod is located between the baffle and the collection chamber. The inner wall of the hemispherical baffle is provided with a second anti-corrosion layer. The diameter of the hemispherical baffle is smaller than the diameter of the hemispherical collection chamber.
[0013] During the experiment, the sealing valve is closed, the knob is adjusted to lower the battery rack, the battery to be tested and the related testing devices are placed on the battery rack, and the knob is adjusted to raise the battery rack to the preset experimental position under the baffle. During the lithium-ion battery test, the baffle guides the electrolyte back to the collection chamber. After the test, the electrolyte is transferred a second time through the sealing valve.
[0014] Optionally, the length of the battery rack support rod is determined according to the ratio of the diameter of the baffle to the diameter of the collection compartment.
[0015] Optionally, the knob is a threaded knob.
[0016] Optionally, the battery rack is rectangular in shape, perpendicular to the battery rack support rod and parallel to the cross-section of the hemispherical collection compartment and the baffle.
[0017] Optionally, the diameter of the collection chamber is not less than the diameter of the baffle.
[0018] Optionally, the thickness of the first anti-corrosion layer is equal to the thickness of the second anti-corrosion layer.
[0019] Optionally, the length of the battery rack support rod is greater than the height of the lithium-ion battery to be tested.
[0020] Optionally, the first and second anti-corrosion layers are made of EPDM material.
[0021] Optionally, the collection compartment and the battery rack support rod are fixedly connected by welding, and the baffle and the battery rack support rod are fixedly connected by welding.
[0022] The beneficial effects of the embodiments in this specification are as follows:
[0023] This specification provides an embodiment of an electrolyte collection device for lithium-ion battery thermal runaway testing. This device is mainly designed for lithium iron phosphate batteries. The bottom of the collection chamber is equipped with an anti-corrosion sealing valve to prevent electrolyte corrosion and facilitate electrolyte collection and sealing of the collection chamber. An annular stabilizing platform is provided outside the collection chamber to fix and stabilize the device. The inner layer of the collection chamber is tightly fitted with an anti-corrosion layer to prevent electrolyte corrosion of the inner wall of the collection chamber. A battery rack support rod is provided inside the collection chamber, and a rectangular battery rack is provided on the battery rack support rod to facilitate battery arrangement. A semi-circular baffle is fixed to the top of the battery rack support rod to guide the flow. The inner layer of the baffle is tightly fitted with an anti-corrosion layer to prevent electrolyte corrosion of the baffle. During the experimental test, the experimental battery was placed on a rectangular battery rack. Then, the screw adjustment knob was adjusted to raise the battery rack to the underside of the semi-circular baffle. After that, the battery thermal runaway was triggered. The electrolyte and other substances ejected from the battery were diverted to the collection chamber and discharged and collected through the sealed valve at the bottom of the collection chamber. This improved the electrolyte collection efficiency and enabled the collection of all electrolyte after the battery thermal runaway.
[0024] The innovative aspects of the embodiments in this specification include:
[0025] 1. The combination and size design of the collection chamber, battery rack support rod and baffle in this specification can ensure the complete collection of battery fluid after the experiment, which is one of the innovative points of the embodiments in this specification.
[0026] 2. In this specification, the sealing valve at the bottom of the bracket and the collection chamber, as well as the gap between the bracket and the collection chamber, facilitate the secondary transfer of battery fluid, which is one of the innovative points of the embodiments in this specification. Attached Figure Description
[0027] To more clearly illustrate the technical solutions in the embodiments or related technologies of this specification, the drawings used in the description of the embodiments or related technologies will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0028] Figure 1 This is a schematic diagram of the structure of an electrolyte collection device for testing thermal runaway of a lithium-ion battery, provided in one embodiment of this specification.
[0029] Figure 2 This is a front view of an electrolyte collection device for testing thermal runaway of a lithium-ion battery, provided in one embodiment of this specification.
[0030] Figure 3This is a left view of an electrolyte collection device for testing thermal runaway of a lithium-ion battery, provided in one embodiment of this specification.
[0031] Figure 4 The image shows a right view of an electrolyte collection device for testing thermal runaway of a lithium-ion battery, provided as an embodiment of this specification. Detailed Implementation
[0032] The technical solutions in the embodiments of this specification will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.
[0033] It should be noted that the terms "comprising" and "having," and any variations thereof, in the embodiments and drawings of this specification are intended to cover non-exclusive inclusion. For example, a process, method, system, product, or device that includes a series of steps or units is not limited to the steps or units listed, but may optionally include steps or units not listed, or may optionally include other steps or units inherent to these processes, methods, products, or devices.
[0034] This specification discloses an electrolyte collection device for testing thermal runaway of lithium-ion batteries, which will be described in detail below.
[0035] Figure 1 This is a schematic diagram of an electrolyte collection device for testing thermal runaway in a lithium-ion battery, provided as an embodiment of this specification. This device is primarily designed for lithium iron phosphate batteries. Figure 1 As shown, a lithium-ion battery thermal runaway test electrolyte collection device includes a bracket 1, a collection chamber 2, a sealing valve port 3, a first anti-corrosion partition 4, a battery rack support rod 5, a battery rack 6, a knob 7, a baffle 8, and a second anti-corrosion partition 9.
[0036] The support 1 is fixedly installed at the bottom of the device. The support 1 is a hollow column with a hemispherical groove on its upper surface. The collection chamber 2 is placed on the groove on the upper surface of the support 1, and the curvature of the groove is a first value. The support 1 can fix the device and provide stability.
[0037] The collection chamber 2 is a hemispherical shell with an arc of a second value, where the first value is greater than the second value. A gap is formed between the bottom of the collection chamber 2 and the groove of the support. A sealing valve port 3 is located at the bottom of the collection chamber and connects to the gap. A first anti-corrosion layer 4 is provided on the inner wall of the collection chamber 2. The anti-corrosion sealing valve port 3 can prevent electrolyte corrosion and facilitate the collection of electrolyte and sealing of the collection chamber. The sealing valve port 3 can be freely adjusted to open or close, facilitating the secondary transfer of the collected electrolyte. The first anti-corrosion layer 4 can prevent electrolyte corrosion of the inner wall of the collection chamber.
[0038] The diameter of the collection chamber is not less than the diameter of the baffle, so that after the electrolyte is sprayed onto the baffle, it flows back to the collection chamber due to gravity and is collected by the collection chamber.
[0039] The battery rack support rod 5 has its lower end located inside the collection chamber 2 and fixedly connected to it. The direction of the battery rack support rod 5 is parallel to the central axis of the collection chamber 2, and multiple battery rack support rods are evenly distributed around the circumference of the collection chamber 2. The length of the battery rack support rod 5 is determined by the ratio of the diameter of the baffle 8 to the diameter of the collection chamber 2. Furthermore, the length of the battery rack support rod is greater than the height of the lithium-ion battery to be tested, so that the experimental battery can be arranged on the battery rack.
[0040] The collection compartment and battery rack support rod are fixedly connected by welding.
[0041] The battery rack 6 is fitted onto the battery rack support rod 5 and is used to place the lithium-ion battery to be tested and the testing-related equipment. The battery rack 6 is rectangular in shape, perpendicular to the battery rack support rod 5, and parallel to the cross-section of the hemispherical collection chamber 2 and the baffle 8.
[0042] Knob 7 is located on the battery rack support rod 5 and is used to adjust the up and down movement of the battery rack 6 along the battery rack support rod 5; knob 7 is a threaded knob.
[0043] Baffle 8, a hemispherical shell, is mounted on top of the battery rack support rod 5 and fixedly connected to it. The opening direction of baffle 8 is opposite to the opening direction of the collection chamber 2. The battery rack support rod 5 is located between baffle 8 and collection chamber 2. A second anti-corrosion layer 9 is provided on the inner wall of the hemispherical baffle. The diameter of the hemispherical baffle 8 is smaller than the diameter of the hemispherical collection chamber 2. The hemispherical baffle 8 serves as a guide, ensuring that all electrolyte generated by battery ejection enters the collection chamber 2. The second anti-corrosion layer 9 prevents the electrolyte from corroding the baffle 8.
[0044] The diameter of the baffle is smaller than the size of the collection chamber, which ensures that the electrolyte can be completely collected by the collection chamber after being blocked by the baffle.
[0045] The baffle and battery rack support rod are fixedly connected by welding.
[0046] The thickness of the first anti-corrosion layer is equal to the thickness of the second anti-corrosion layer. This ensures that the anti-corrosion layer can effectively block the corrosion of the electrolyte, protecting the baffle and the collection chamber from corrosion damage. Simultaneously, the consistent thickness ensures that the electrolyte is fully collected by the collection chamber. Both the first and second anti-corrosion layers are made of EPDM material, which can effectively block electrolyte corrosion to a certain extent.
[0047] During the experiment, the sealing valve 3 is closed, and the knob 7 is adjusted to lower the battery rack 6. The battery to be tested and the testing-related devices are placed on the battery rack 6. The knob 7 is then adjusted to raise the battery rack to the preset experimental position under the baffle 8. During the lithium-ion battery test, the baffle 8 guides the electrolyte back into the collection chamber 2. After the test, the electrolyte is transferred a second time through the sealing valve 3.
[0048] Figure 2 , Figure 3 , Figure 4 These are, respectively, a front view, a left view, and a right view of an electrolyte collection device for testing thermal runaway of a lithium-ion battery provided in one embodiment of this specification.
[0049] In summary, the embodiments of this specification provide an electrolyte collection device for lithium-ion battery thermal runaway testing, which can improve the electrolyte collection efficiency and collect all the electrolyte after battery thermal runaway, which is beneficial for further experimental analysis.
[0050] Those skilled in the art will understand that the accompanying drawings are merely schematic diagrams of one embodiment, and the modules or processes shown in the drawings are not necessarily essential for implementing the present invention.
[0051] Those skilled in the art will understand that the modules in the apparatus of the embodiments can be distributed in the apparatus of the embodiments as described in the embodiments, or they can be located in one or more devices different from this embodiment with corresponding changes. The modules of the above embodiments can be combined into one module, or they can be further divided into multiple sub-modules.
[0052] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.
Claims
1. A lithium-ion battery thermal runaway test electrolyte collection device, characterized in that, It includes a bracket, a collection chamber, a sealing valve, a first anti-corrosion partition, a battery rack support rod, a battery rack, a knob, a baffle, and a second anti-corrosion partition, among which... The bracket is fixedly installed at the bottom of the device. The bracket is a hollow column with a hemispherical groove on the upper end face. The collection chamber is placed on the groove on the upper end face of the bracket. The curvature of the groove is the first value. The collection chamber is a hemispherical shell with a second value for the curvature of the collection chamber. The first value is greater than the second value. A gap is formed between the bottom of the collection chamber and the groove of the support. A sealing valve is set at the bottom of the collection chamber and connects to the gap. A first anti-corrosion layer is provided on the inner wall of the collection chamber. The lower end of the battery rack support rod is located inside the collection compartment and is fixedly connected to the collection compartment. The setting direction of the battery rack support rod is parallel to the central axis of the collection compartment, and multiple battery rack support rods are evenly distributed around the circumference of the collection compartment. A battery rack, fitted onto the battery rack support rod, is used to hold the lithium-ion battery to be tested and related testing equipment; A knob, located on the battery rack support rod, is used to adjust the up and down movement of the battery rack along the battery rack support rod; The baffle is a hemispherical shell, which is set on the top of the battery rack support rod and fixedly connected to the battery rack support rod. The opening direction of the baffle is opposite to the opening direction of the collection chamber. The battery rack support rod is located between the baffle and the collection chamber. The inner wall of the hemispherical baffle is provided with a second anti-corrosion layer. The diameter of the hemispherical baffle is smaller than the diameter of the hemispherical collection chamber. During the experiment, the sealing valve is closed, the knob is adjusted to lower the battery rack, the battery to be tested and the test-related devices are arranged on the battery rack, and the knob is adjusted to raise the battery rack to the preset experimental position under the baffle. During the lithium-ion battery test, the baffle guides the electrolyte to fall back into the collection chamber. After the test, the electrolyte is transferred a second time through the sealing valve. The battery rack is rectangular in shape, perpendicular to the battery rack support rod, and parallel to the cross-section of the hemispherical collection compartment and the baffle. The length of the battery rack support rod is determined by the ratio of the diameter of the baffle to the diameter of the collection chamber; the knob is a threaded knob; the diameter of the collection chamber is not less than the diameter of the baffle; the thickness of the first anti-corrosion layer is equal to the thickness of the second anti-corrosion layer.
2. The apparatus according to claim 1, characterized in that, The length of the battery rack support rod is greater than the height of the lithium-ion battery to be tested.
3. The apparatus according to claim 1, characterized in that, The first and second anti-corrosion layers are made of EPDM material.
4. The apparatus according to claim 1, characterized in that, The collection compartment and the battery rack support rod are fixedly connected by welding, and the baffle and the battery rack support rod are fixedly connected by welding.