Battery needling device
By introducing a heating element into the puncture section of the battery puncture device, the problem of poor performance of existing devices is solved, enabling faster cell thermal response and more comprehensive safety performance evaluation, thus improving the accuracy and efficiency of testing.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- HEFEI GUOXUAN HIGH TECH POWER ENERGY
- Filing Date
- 2025-05-30
- Publication Date
- 2026-05-12
AI Technical Summary
Existing needle penetration devices are ineffective in assessing battery thermal runaway safety. Multiple tests increase the complexity and cost of data analysis and fail to effectively trigger the thermal response of the battery cell.
A first heating element is introduced into the piercing part of the needle. By heating the piercing part of the needle, additional heat is provided to accelerate the thermal reaction of the battery cell, simulate more extreme test conditions, and improve the accuracy and efficiency of the test.
By heating the puncture point of the needle, the thermal runaway reaction of the battery cell can be triggered more quickly, shortening the test time, improving test efficiency, and providing a more comprehensive safety performance assessment.
Smart Images
Figure CN224231798U_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of battery technology, and in particular to a battery needle penetration device. Background Technology
[0002] The nail penetration test is an important means of assessing the safety of battery thermal runaway. It tests the safety performance of the battery by simulating the situation where the battery may be punctured by a sharp object under extreme conditions.
[0003] In related technologies, the needle-piercing device includes a base and a needle. During testing, the needle is used to pierce a battery cell that is close to full charge to trigger thermal runaway of the cell, simulating potential risks such as thermal runaway, fire, and explosion of the battery pack after a battery collision.
[0004] However, existing acupuncture devices have the problem of poor effectiveness. Utility Model Content
[0005] This application provides a battery needle penetration device that, by introducing additional heat into the puncture portion of the needle, can more effectively trigger the thermal reaction inside the battery cell, thereby accelerating the battery cell's response to the needle penetration test, simulating more extreme test conditions, more comprehensively evaluating the safety performance of the battery cell under extreme conditions, and improving the performance of the battery needle penetration device.
[0006] This application provides a battery needle penetration device, including:
[0007] The base has a supporting plane for placing the battery;
[0008] Needles are used to puncture batteries.
[0009] The needle includes a base portion and a needle-piercing portion that are connected to each other, and the needle-piercing portion forms a first cavity;
[0010] The first heating element is located in the first cavity.
[0011] In some embodiments of this application, the needle-punched portion is a heat-conducting element, and the first heating element abuts against the inner wall of the needle-punched portion.
[0012] In some embodiments of this application, the battery needle piercing device further includes a connector and a power supply.
[0013] The base portion has a second cavity that communicates with the first cavity; a connector is located in the second cavity; the connector is used to connect the first heating element and the power supply element; the extension direction of the connector is parallel to the extension direction of the base portion.
[0014] In some embodiments of this application, the battery needle piercing device further includes a power supply component; the power supply component is connected to the base portion and is used to supply power to the needle.
[0015] In some embodiments of this application, the battery needle piercing device further includes a second heating element, which is sleeved on the outer periphery of the base portion; the second heating element is used to heat the base portion.
[0016] In some embodiments of this application, the heating power of the first heating element is less than the heating power of the second heating element.
[0017] In some embodiments of this application, the battery needle piercing device further includes a temperature detection element and a control element, wherein the detection end of the temperature detection element is connected to the needle piercing part, and the temperature detection element is used to obtain the temperature of the needle piercing part.
[0018] The temperature sensing element, the first heating element, and the second heating element are all electrically connected to the control element.
[0019] In some embodiments of this application, the cross-section of the needle portion is triangular along the extension direction perpendicular to the base portion.
[0020] Along the extension direction perpendicular to the base, the cross-section of the first heating element is circular or triangular.
[0021] In some embodiments of this application, the first heating element includes a resistance wire; and / or, the second heating element includes a heating sleeve and / or a heating band.
[0022] In some embodiments of this application, the battery needle penetration device further includes a heat insulation element, which is sleeved on the outer periphery of the base portion.
[0023] The battery needle-piercing device provided in this application includes a base, a needle, and a first heating element. The base has a supporting plane for placing a battery; the needle is used to pierce the battery; the needle includes a base portion and a piercing portion connected to each other, the piercing portion forming a first cavity; the first heating element is located in the first cavity.
[0024] The battery needle penetration device provided in this application embodiment has a first heating element for providing heat to the needle penetration portion. In this way, by introducing additional heat to the needle penetration portion, the thermal reaction inside the battery cell can be triggered more effectively, thereby accelerating the battery cell's response to the needle penetration test, simulating more extreme test conditions, and more comprehensively evaluating the safety performance of the battery cell under extreme conditions, thus improving the performance of the battery needle penetration device.
[0025] Compared to traditional needle penetration testing devices, the battery needle penetration device provided in this application embodiment, after introducing a first heating element into the needle penetration part, can accelerate the thermal reaction process inside the battery cell after the needle penetration part penetrates the battery cell, thereby shortening the testing time and improving the testing efficiency. Attached Figure Description
[0026] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with this application and, together with the description, serve to explain the principles of this application.
[0027] Figure 1 A schematic diagram of the structure of the piercing needle of the battery piercing device provided in the embodiments of this application. Figure 1 ;
[0028] Figure 2 A schematic diagram of the structure of the piercing needle of the battery piercing device provided in the embodiments of this application. Figure 2 ;
[0029] Figure 3 A schematic diagram of the structure of the piercing needle of the battery piercing device provided in the embodiments of this application. Figure 3 .
[0030] Explanation of reference numerals in the attached figures:
[0031] 100: Needle-punching part; 200: Base part; 300: First heating element; 400: Connecting element; 500: Power supply element; 600: Second heating element.
[0032] The accompanying drawings illustrate specific embodiments of this application, which will be described in more detail below. These drawings and descriptions are not intended to limit the scope of the concept in any way, but rather to illustrate the concept of this application to those skilled in the art through reference to particular embodiments. Detailed Implementation
[0033] Exemplary embodiments will now be described in detail, examples of which are illustrated in the accompanying drawings. When the following description relates to the drawings, unless otherwise indicated, the same numbers in different drawings denote the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with this application. Rather, they are merely examples of apparatuses and methods consistent with some aspects of this application as detailed in the appended claims.
[0034] The nail penetration test is an important method for assessing the thermal runaway safety of batteries. It simulates the situation where a battery might be punctured by a sharp object under extreme conditions to test the battery's safety performance. The main purpose of the nail penetration test is to evaluate the battery's thermal runaway safety when punctured by a sharp object.
[0035] In the needle penetration test, a needle is used to penetrate a battery cell that is close to full charge to trigger thermal runaway of the battery cell, simulating the risk scenarios that may occur after a trolley collision, such as thermal runaway, fire, and explosion of the battery pack.
[0036] In actual needle penetration tests, sometimes the battery cell experiences thermal runaway after being punctured by the needle. If the battery cell does not experience thermal runaway after being punctured (i.e., it does not immediately catch fire or explode), it usually indicates that the battery cell has good safety performance.
[0037] However, even if thermal runaway does not occur in the battery cell after needle penetration, it's possible that the needle did not reach the critical area that could trigger a short circuit. To avoid this and improve the accuracy of needle penetration testing, related technologies require multiple needle penetration tests on the battery cell at different locations and angles to improve coverage and test safety. Statistical analysis of the test results is then performed to evaluate the battery cell's safety performance under different conditions.
[0038] Multiple tests generate a large amount of data, increasing the complexity and workload of data analysis. Multiple tests also require more time, increasing the cost and complexity of testing. Therefore, existing acupuncture devices suffer from unsatisfactory performance.
[0039] In view of this, embodiments of this application provide a battery needle-piercing device, which includes a base, a needle, and a first heating element. The base has a supporting plane for placing a battery; the needle is used to pierce the battery; the needle includes a base portion and a piercing portion connected to each other, the piercing portion forming a first cavity; the first heating element is located in the first cavity.
[0040] The battery needle penetration device provided in this application embodiment has a first heating element for providing heat to the needle penetration portion. In this way, by introducing additional heat to the needle penetration portion, the thermal reaction inside the battery cell can be triggered more effectively, thereby accelerating the battery cell's response to the needle penetration test, simulating more extreme test conditions, and more comprehensively evaluating the safety performance of the battery cell under extreme conditions, thus improving the performance of the battery needle penetration device.
[0041] Compared to traditional needle penetration testing methods, the battery needle penetration device provided in this application, after introducing a first heating element into the needle penetration part, can accelerate the thermal reaction process inside the battery cell after the needle penetration part penetrates the battery cell, thereby shortening the testing time and improving the testing efficiency.
[0042] The technical solution of this application and how the technical solution of this application solves the above-mentioned technical problems are described in detail below with specific embodiments. These specific embodiments can be combined with each other, and the same or similar concepts or processes may not be described again in some embodiments. The embodiments of this application will now be described with reference to the accompanying drawings.
[0043] Reference Figure 1 As shown, this application embodiment provides a battery needle penetration device, including:
[0044] The base has a supporting plane for placing the battery;
[0045] Needles are used to puncture batteries.
[0046] The needle includes a base portion 200 and a needle portion 100 connected to each other, and the needle portion 100 forms a first cavity;
[0047] The first heating element 300 is located in the first cavity.
[0048] For example, the base provides a stable supporting surface for placing the battery. It ensures the battery remains in a fixed position during testing, preventing movement or tilting. By providing stable support, the base helps improve the accuracy and repeatability of the test. The robust base design reduces the risk of accidental battery movement during testing, thereby improving operational safety.
[0049] The needle is used to puncture the battery. The needle simulates the mechanical damage that the battery may encounter under extreme conditions such as impact or puncture. By puncturing the battery, the needle can trigger a short circuit inside the battery, thereby inducing a thermal runaway reaction, testing the battery's safety performance, and thus evaluating the battery's response to mechanical damage.
[0050] The needle includes a base portion 200 and a needle-piercing portion 100, the needle-piercing portion 100 ensuring that the needle has sufficient strength and sharpness to effectively pierce the battery casing.
[0051] The first cavity within the needle-piercing portion 100 accommodates the first heating element 300, ensuring its tight integration within the needle. Heat generated by the first heating element 300 is transferred to the needle-piercing portion 100, thus heating it. Heating the needle-piercing portion 100 realistically simulates the battery's behavior under conditions of simultaneous high temperature and mechanical damage. Even if the needle fails to reach critical parts of the battery, the heat provided by the first heating element 300 to the needle-piercing portion 100 can trigger a thermal runaway response, facilitating technicians' assessment of battery safety.
[0052] For example, the needle may be made of tungsten, tungsten alloy, or steel.
[0053] Tungsten has a high melting point, making it very stable in high-temperature applications and resistant to melting or deformation. Tungsten needles are suitable for use in environments requiring high-temperature operation, such as the high temperatures that may occur in battery needle penetration tests. Tungsten possesses extremely high strength and hardness, capable of withstanding high mechanical stress without easily deforming. During needle penetration, tungsten can effectively pierce the battery casing and internal structure without easily damaging it.
[0054] Steel, such as high-carbon steel and alloy steel, possesses high mechanical strength, can withstand repeated puncture stress, and is not easily deformed or broken, making it suitable for high-frequency use. The high surface hardness of steel reduces wear caused by long-term use, extending its lifespan.
[0055] The battery needle penetration device provided in this application introduces additional heat into the needle penetration portion 100, which can more effectively trigger the thermal reaction inside the battery cell, thereby accelerating the cell's response during the needle penetration test. This method can simulate more extreme test conditions and more comprehensively evaluate the cell's safety performance under extreme conditions.
[0056] After the first heating element 300 is introduced into the needle-piercing section 100, the separator material inside the battery cell is more prone to physical or chemical changes, such as melting or decomposition, after the needle-piercing section 100 penetrates the battery cell. This helps to more accurately determine the puncture resistance and thermal runaway risk of the battery cell. The huge heat generated by the short circuit will further accelerate the chemical reaction inside the battery cell, making the test results more intuitive and clear.
[0057] Compared to traditional needle penetration testing devices, the battery needle penetration device provided in this application embodiment, after the first heating element 300 is introduced into the needle penetration part 100, and after the needle penetration part 100 penetrates the battery cell, the heated needle penetration part 100 can accelerate the thermal reaction process inside the battery cell, thereby shortening the testing time and improving the testing efficiency.
[0058] In some embodiments, the inner wall of the first heating element 300 and the needle-punching part 100 does not abut against each other. The first heating element 300 can transfer heat to the needle-punching part 100 by radiation or convection.
[0059] In one feasible implementation, the inner wall of the first heating element 300 and the needled portion 100 abuts against each other. The needled portion 100 is a heat-conducting element.
[0060] In some embodiments, the direct contact between the first heating element 300 and the inner wall of the needled portion 100 allows the heat from the first heating element 300 to be quickly conducted to the needled portion 100. Since the needled portion 100 is a heat-conducting element, it applies heat to the battery, and after the needled portion 100 punctures the battery, it transfers the heat to the inside of the battery cell.
[0061] Because the first heating element 300 is in direct contact with the inner wall, heat transfer efficiency is high, enabling the required temperature conditions to be reached in a short time. Efficient heat conduction reduces energy loss and improves the energy efficiency of the heating process. Through effective heat conduction, the behavior of the battery under conditions of simultaneous high temperature and mechanical damage can be more realistically simulated, providing a more accurate safety performance assessment.
[0062] Furthermore, the contact between the first heating element 300 and the inner wall helps to fix the first heating element 300 in the proper position of the needle part 100, preventing it from moving or loosening during operation. The contact design between the first heating element 300 and the inner wall of the needle part 100 allows the first heating element 300 to be tightly integrated into the needle, maintaining the overall compactness and stability of the needle.
[0063] As one feasible implementation method, refer to Figure 1 and Figure 2 As shown, the cross-section of the needled portion 100 is triangular along the extension direction perpendicular to the base portion 200. The cross-section of the first heating element 300 is circular or triangular along the extension direction perpendicular to the base portion 200; the first heating element 300 and the inner wall of the needled portion 100 abut against each other. The extension direction perpendicular to the base portion 200 is perpendicular to... Figure 1 The direction of the XY plane. The extension direction of the base part 200 is... Figure 1 Center Y direction.
[0064] For example, the cross-section of the needle-punching portion 100 is triangular. For instance, the cross-section of the needle-punching portion 100 can be an equilateral triangle or an isosceles triangle.
[0065] The sharp edges of the triangle reduce resistance during insertion, making it easier for the needle tip 100 to penetrate the battery casing and cell. The pointed design concentrates stress at the insertion point, enhancing insertion efficiency. The triangular shape helps to precisely locate the insertion point, ensuring repeatability for each test. The triangular shape also helps to concentrate heat in the tip area, improving the efficiency of heat transfer to the cell.
[0066] In some embodiments, the first heating element 300 has a circular cross-section. The symmetry of the circle allows heat to diffuse evenly in all directions, reducing the risk of localized overheating. The circular cross-section provides a larger surface area, which helps to transfer heat more evenly to the inner wall of the needle portion 100. The circular structure provides the smallest surface area to volume ratio with the same amount of material used, reducing heat loss. The circular cross-section exhibits good stability during thermal expansion, reducing deformation due to thermal stress.
[0067] In other embodiments, the edges of the triangle contact the inner wall of the needle portion 100, forming multiple heat transfer paths. This multi-point contact can improve the efficiency of heat transfer. The characteristics of multi-point contact and concentrated transfer enable the triangular cross-section to transfer heat to the needle portion 100 more effectively.
[0068] As one possible implementation, the first heating element 300 includes a resistance wire.
[0069] For example, the first heating element 300 includes a resistance wire that can be wound to form a first heating element 300 with a circular cross-section. It is understood that the power supply can be a battery, and the resistance wire is connected to the battery via wires. The battery is used to supply power to the resistance wire so that the resistance wire is energized and generates heat.
[0070] As one feasible implementation method, refer to Figure 1 and Figure 2 As shown, the battery needle penetration device also includes a connector 400 and a power supply unit 500.
[0071] The base portion 200 has a second cavity that communicates with the first cavity; a connector 400 is located in the second cavity; the connector 400 is used to connect the first heating element 300 and the power supply element 500; the extending direction of the connector 400 is parallel to the extending direction of the base portion 200. The extending direction of the base portion 200 is referenced... Figure 1 The direction shown in Y.
[0072] For example, the base portion 200 forms a second cavity that communicates with the first cavity of the needle portion 100. This design allows for the arrangement of additional components, such as connectors, inside the needle, thereby improving the compactness and functional integration of the needle.
[0073] The connector 400 is located within the second cavity, and its main function is to connect the first heating element 300 and the power supply element 500. The design of the connector 400 ensures that current can be efficiently transmitted to the first heating element 300, thereby achieving the heating function. The extension direction of the connector 400 is parallel to the extension direction of the base portion; this arrangement helps optimize space utilization and ensures the stability and reliability of the electrical connection. The connector 400 can be a wire.
[0074] The power supply unit 500 provides the necessary electrical energy to the first heating element 300. It can be a battery pack or an external power interface, depending on the design requirements and operating environment of the battery needle penetration device. The integration of the power supply unit 500 allows the battery needle penetration device to operate independently or achieve longer operating times with an external power source.
[0075] As one possible implementation, the battery needle puncture device also includes a power supply unit 500; the power supply unit 500 is connected to the base portion 200 and is used to supply power to the needle.
[0076] For example, the power supply component 500 is connected to the base portion 200. This design means that the power supply component 500 may provide power to the entire needle. Since the needle is made of metal, the power supply component 500 can directly provide energy to the needle, and the needle can directly generate heat.
[0077] In some embodiments, the connection between the power supply unit 500 and the base portion 200 may be achieved via an electrical connector or wire. This connection ensures that power can be efficiently transmitted to the base portion 200 to generate heat in the base portion.
[0078] The needle is directly powered by the power supply unit 500, allowing the needle itself to function as a resistance heating element. This design utilizes the conductivity of the needle's metallic material (such as tungsten, tungsten alloy, or steel), enabling it to heat up directly upon being energized. Because the needle itself heats up directly, heat transfer is more rapid, reaching the required temperature conditions much faster. The entire needle acts as a heating element, providing a more uniform heat distribution and more realistically simulating the reaction of a battery under high-temperature conditions.
[0079] For example, the power supply unit 500 provides electrical energy to the first heating element 300 located within the needle-punching section 100, enabling it to heat the needle-punching section. This heating function simulates the reaction of a battery under high-temperature conditions.
[0080] The power supply unit 500 also supplies power to the piercing needle, causing the needle to act as a resistor when current flows through it, generating additional heat. This design makes the piercing needle itself a heat source. The power supply unit 500 can be a power source.
[0081] By implementing multi-point heating at the needle penetration portion 100 and the base portion 200, the battery needle penetration device can more realistically simulate the thermal runaway behavior of the battery under complex environments. This multi-point heating can more comprehensively trigger the chemical reactions inside the battery, providing a more accurate safety performance assessment. Multi-point heating increases the complexity of the test conditions, making the test results more representative and challenging, and enabling a better evaluation of the battery's performance under extreme conditions.
[0082] As one possible implementation, the battery needle piercing device further includes a second heating element 600, which is sleeved on the outer periphery of the base portion 200; the second heating element 600 is used to heat the base portion 200.
[0083] For example, the second heating element 600 is directly connected to and heats the piercing needle, ensuring that the needle provides immediate and concentrated heat when it pierces the battery. By directly heating the piercing needle, the thermal runaway reaction inside the battery can be triggered more effectively, especially when the needle pierces a critical area.
[0084] The addition of the second heating element 600 enables the device to flexibly adjust the heating strategy under different test conditions, providing a variety of test scenarios.
[0085] The design of the first heating element 300 and the second heating element 600 enables multi-point heating of the needle; multi-point heating can more realistically simulate the thermal runaway behavior of the battery in complex environments and provide a more comprehensive safety performance assessment.
[0086] In addition, by heating the base portion 200, the thermal expansion of the needle during the heating process can be better managed, reducing structural stress and deformation.
[0087] For example, the second heating element 600 is sleeved on the outer periphery of the base portion 200, which can provide a surrounding heating effect. The peripheral heating helps to evenly transfer heat to the base portion 200 and the connected needle portion 100, optimizing the heat conduction path.
[0088] External heating supplements and supports the heat output of the internal heating elements, ensuring overall temperature stability. External heating also reduces heat loss to the external environment, improving energy efficiency.
[0089] In the needle of the battery needle-piercing device provided in this application embodiment, the first heating element 300 is used to heat the inside of the needle, and the second heating element 600 is used to heat the outside of the needle.
[0090] The first heating element 300 is located inside the needle. Through internal heating, heat can be quickly transferred to the needle insertion part 100, ensuring an immediate thermal effect when the battery is inserted. The second heating element 600 is sleeved on the outer periphery of the base part 200, providing a surrounding heating effect. Through external heating, the overall temperature of the needle is ensured to be uniform, reducing local overheating or cold spots. The external second heating element 600 supplements and supports the heat output of the internal first heating element 300 and second heating element 600, ensuring the overall temperature stability.
[0091] This multi-point and multi-layer heating design allows the probe to be rapidly heated to the required temperature, improving the test response speed. Sufficient heat is provided the moment the probe pierces the battery to trigger a thermal runaway response.
[0092] As one possible implementation, the second heating element 600 includes a heating jacket and / or a heating band.
[0093] For example, the heating jacket is a heating device that can be wrapped around the base portion 200, providing comprehensive heat coverage for applications requiring large-area heating. The battery-powered needle device includes a power supply component, which may be a battery. The heating jacket is connected to the battery via wires, and the battery supplies power to the heating jacket to generate heat.
[0094] For example, the heating band is a long, strip-shaped heating element that can be wound around the base portion 200. The heating band has the advantage of high flexibility. The battery-powered needle-punching device includes a power supply unit, which may be a battery. The heating band is connected to the battery via wires, and the battery supplies power to the heating band to generate heat.
[0095] As one feasible implementation, the heating power of the first heating element 300 is less than the heating power of the second heating element 600.
[0096] For example, the first heating element 300 is located in the first cavity of the needle-piercing portion 100 and is mainly used to provide local heating to trigger the thermal runaway response of the battery. The low power of the first heating element 300 allows for fine control of the temperature of the needle-piercing portion 100 to avoid overheating, while ensuring sufficient heat transfer to simulate the effect of a sharp object piercing.
[0097] For example, the second heating element 600 is used to heat the base portion 200, providing supplemental heat to support overall heat conduction. The high-power second heating element 600 can heat up rapidly, ensuring that the device reaches the required test conditions in a short time.
[0098] The battery needle-piercing device provided in this application embodiment implements a graded heating strategy by setting heating elements with different power levels, optimizing the heat conduction path, and ensuring that heat is effectively transferred from the base part 200 to the needle part. The configuration of different power levels improves the overall thermal efficiency and reduces unnecessary heat loss.
[0099] With precise power configuration, the temperature can be flexibly adjusted under different testing conditions, providing accurate temperature control. Different heating power configurations allow for the simulation of various extreme conditions, enhancing the comprehensiveness and realism of the test.
[0100] In some embodiments, when the battery cell is thin, the needle portion 100 heated by the first heating element 300 can quickly induce thermal failure of the battery cell, shortening the testing time. Since the needle portion 100 is directly heated, heat is concentrated in the area to be tested, improving the targeting of the test. In other words, when the battery cell is thin, only the first heating element 300 needs to heat the needle portion 100.
[0101] In other embodiments, when the battery cell is thick or the needle has penetrated the cell, heat needs to penetrate a greater material thickness to effectively affect the cell's interior. After the needle penetrates the cell, it is necessary to ensure that heat can continue to be transferred deep into the cell. Relying solely on the first and second heating elements 600 may not be sufficient to provide enough heat, especially when simulating extreme conditions.
[0102] At this time, the first heating element 300 and the second heating element 600 can be activated simultaneously. The first heating element 300 heats the needle-piercing part 100, and the second heating element 600 heats the base part 200. In this way, the energy obtained by the needle from the first heating element 300 and the second heating element 600 is used to pierce the battery cell and promote the failure of the battery cell.
[0103] Because the second heating element 600 has a higher heating power, it heats the needle. Through high-power heating, the heat can be evenly transferred to the entire length of the needle, thus more effectively affecting the inside of the battery cell.
[0104] In some other embodiments, when the battery cell is thick or the needle has penetrated the cell, heat needs to penetrate an even greater material thickness to effectively affect the cell's interior. After the needle penetrates the cell, it is necessary to ensure that heat can continue to be transferred deep into the cell. Relying solely on the first and second heating elements 600 may not be sufficient to provide adequate heat, especially when simulating extreme conditions.
[0105] At this time, the first heating element 300 and the power supply element 500 can be activated simultaneously. The first heating element 300 heats the needle part 100, and the power supply element 500 supplies power to the needle so that the needle generates heat as a resistor. In this way, the needle generates heat itself and obtains energy from the first heating element 300, and the temperature of the needle is higher, so as to promote the failure of the battery cell.
[0106] The battery needle penetration device provided in this application embodiment heats the needle by controlling one or more of the first heating element 300 and the second heating element 600. The heating method can be adjusted according to the thickness, material, and testing requirements of the battery cell. For example, the first heating element 300 and the second heating element 600 can be heated simultaneously to heat the entire needle, or the first heating element 300 can be heated only to heat the needle penetration portion 100 partially. This flexibility allows the testing method to be applied to different types and specifications of battery cells, improving the versatility and applicability of the test.
[0107] In one feasible implementation, the battery needle-piercing device further includes a temperature detection element and a control element. The detection end of the temperature detection element is connected to the needle-piercing part 100, and the temperature detection element is used to obtain the temperature of the needle-piercing part 100. The temperature detection element, the first heating element 300, the second heating element 600, and the second heating element 600 are all electrically connected to the control element.
[0108] For example, the sensing end of the temperature sensor is connected to the needle-punching section 100 to acquire the temperature of the needle-punching section 100 in real time. The temperature sensor provides real-time temperature data to inform the decision-making of the control unit. The control unit is responsible for receiving the data provided by the temperature sensor and adjusting the power output of each heating element according to a preset temperature range and strategy.
[0109] By electrically connecting the temperature detection element, the first heating element 300, and the second heating element 600 to the control element, the control element uniformly manages the working status of the first heating element 300 and the second heating element 600.
[0110] Precise temperature control prevents unpredictable cell reactions caused by overheating, ensuring the safety of the testing process. Dynamically adjusting power output maintains stable testing conditions, improving the reliability of test results.
[0111] By monitoring and adjusting in real time, the temperature of the probe and the battery cell is ensured to be within the expected range, improving the accuracy of the test. Consistency in test conditions for each test enhances the repeatability and comparability of the results.
[0112] For example, the temperature detection element includes a temperature sensor.
[0113] In some embodiments, the temperature sensing element is directly fixed to the surface of the needle-punched portion 100 to ensure good thermal contact between the temperature sensing element and the needle-punched portion 100.
[0114] In other embodiments, a small hole or groove is provided in the needle portion 100 to embed the temperature sensing element. This provides more stable temperature measurement and reduces interference from the external environment.
[0115] In some other embodiments, thermally conductive adhesive or welding techniques are used to fix the temperature sensing element to the needle portion 100. This ensures secure mounting of the temperature sensing element and good thermal conductivity.
[0116] As one feasible implementation method, refer to Figure 3 As shown, the battery needle penetration device also includes a heat insulation component, which is sleeved on the outer periphery of the base portion 200.
[0117] For example, the function of thermal insulation is to reduce the transfer of heat to areas that do not require heating, thereby protecting equipment and operators and improving heating efficiency.
[0118] The insulation component is made of a material with low thermal conductivity, such as ceramic fiber, glass fiber, or aluminosilicate fiber. The insulation component is designed in a sleeve shape, for example, as an insulation sleeve, which can be tightly fitted around the outer periphery of the base portion 200 to provide comprehensive thermal insulation protection.
[0119] The main function of thermal insulation is to prevent heat from being transferred from the heated area to the external environment, ensuring that heat is concentrated in the area where it is needed. It also protects surrounding equipment and structures from high temperatures, preventing damage caused by overheating.
[0120] By reducing heat loss, more heat is ensured to be used to heat the target area, improving overall heating efficiency. Energy consumption is reduced because less heat is wasted in the environment, lowering the temperature of the needle's outer surface and reducing the risk of burns to operators.
[0121] Other embodiments of this application will readily occur to those skilled in the art upon consideration of the specification and practice of the utility models disclosed herein. This application is intended to cover any variations, uses, or adaptations of this application that follow the general principles of this application and include common knowledge or customary techniques in the art not disclosed herein. The specification and examples are to be considered exemplary only, and the true scope and spirit of this application are indicated by the following claims.
[0122] It should be understood that this application is not limited to the precise structure described above and shown in the accompanying drawings, and various modifications and changes can be made without departing from its scope. The scope of this application is limited only by the appended claims.
Claims
1. A battery needle penetration device, characterized in that, include: A base having a support plane for placing a battery; A piercing needle, used to puncture the battery; The needle includes a base portion (200) and a needle portion (100) connected to each other, the needle portion (100) forming a first cavity; The first heating element (300) is located in the first cavity.
2. The battery needle penetration device according to claim 1, characterized in that, The needle-punched part (100) is a heat-conducting component, and the first heating component (300) and the inner wall of the needle-punched part (100) abut against each other.
3. The battery needle penetration device according to claim 1, characterized in that, It also includes connectors (400) and power supply components (500); The base portion (200) has a second cavity, which is connected to the first cavity; the connector (400) is located in the second cavity; the connector (400) connects the first heating element (300) and the power supply element (500). The extension direction of the connector (400) is parallel to the extension direction of the base portion (200).
4. The battery needle penetration device according to claim 1, characterized in that, It also includes a power supply component (500); the power supply component (500) is connected to the base portion (200), and the power supply component (500) is used to supply power to the needle.
5. The battery needle-piercing device according to any one of claims 1-4, characterized in that, It also includes a second heating element (600), which is sleeved on the outer periphery of the base portion (200); the second heating element (600) is used to heat the base portion (200).
6. The battery needle penetration device according to claim 5, characterized in that, The heating power of the first heating element (300) is less than the heating power of the second heating element (600).
7. The battery needle penetration device according to claim 5, characterized in that, It also includes a temperature detection element and a control element. The detection end of the temperature detection element is connected to the needle-punching part (100). The temperature detection element is used to obtain the temperature of the needle-punching part (100). The temperature detection element, the first heating element (300), and the second heating element (600) are all electrically connected to the control element.
8. The battery needle-piercing device according to any one of claims 1-4, characterized in that, Along the extension direction perpendicular to the base portion (200), the cross-section of the needle portion (100) is triangular; Along the extension direction perpendicular to the base portion (200), the cross-section of the first heating element (300) is circular or triangular.
9. The battery needle penetration device according to claim 5, characterized in that, The first heating element (300) includes a resistance wire; And / or, the second heating element (600) includes a heating sleeve and / or a heating band.
10. The battery needle-piercing device according to any one of claims 1-4, characterized in that, It also includes a heat insulation component, which is fitted around the outer periphery of the base portion (200).