Heat dissipation probe and charging and discharging equipment

Abstract

The utility model provides a heat dissipation probe and charging and discharging equipment, and belongs to the technical field of batteries. The heat dissipation probe comprises a current probe, and a first heat dissipation piece and a second heat dissipation piece which are sequentially arranged along a first direction. The current needle comprises a rod body part extending in the first direction and a head part connected with the first end of the rod body part, the first heat dissipation piece sleeves the surface of the head part and is in heat conduction connection with the head part, and the second heat dissipation piece sleeves the surface of one end, close to the head part, of the rod body part and is in heat conduction connection with the rod body part. By arranging the first heat dissipation piece and the second heat dissipation piece, heat generated when the current pin works is taken away as much as possible, so that the temperature of the battery in the charging and discharging process is reduced, and the problems of battery damage and potential safety hazards caused by too high temperature are reduced.

Description

Technical Field

[0001] The present application relates to the technical field of batteries, and particularly to a heat dissipation probe and a charging and discharging device. Background Art

[0002] With the development of the battery industry, the energy density of batteries is getting higher and higher. Using high current to achieve high-efficiency charging and discharging operations is an inevitable path for the industry development. However, during high-current charging and discharging, heat is also generated, which will have an adverse impact on the performance of the battery during the charging and discharging process and needs to be improved urgently. Summary of the Utility Model

[0003] The present application aims to solve at least one of the technical problems existing in the background art. For this reason, an object of the present application is to provide a heat dissipation probe and a charging and discharging device to improve the heat dissipation effect of the heat generated during the battery charging and discharging process.

[0004] An embodiment of the first aspect of the present application provides a heat dissipation probe, including a current needle, a first heat dissipation member and a second heat dissipation member arranged in sequence along a first direction. The current needle includes a rod portion extending along the first direction and a head connected to the first end of the rod portion. The end of the head away from the rod portion is used to contact the pole column of the battery. The first heat dissipation member is sleeved on the surface of the current needle and is thermally connected to the head, and the second heat dissipation member is sleeved on the surface of the rod portion near the head and is thermally connected to the rod portion.

[0005] In the technical solution of the embodiment of the present application, by setting the first heat dissipation member to take away the heat of the head and the second heat dissipation member to take away the heat of the rod portion near the head, the heat generated when the current needle works can be taken away as much as possible, so as to reduce the phenomenon of heat transfer to the battery, and further reduce the temperature of the battery during the charging and discharging process, and reduce the problems of battery damage and potential safety hazards caused by overheating. At the same time, by sleeving the first heat dissipation member and the second heat dissipation member on the current needle, the corresponding first heat dissipation member and second heat dissipation member can be replaced according to different heat dissipation requirements to meet the charging and discharging conditions of various current values, and the versatility of the heat dissipation probe is improved.

[0006] In some embodiments, both the first heat dissipation member and the second heat dissipation member include a plurality of fins arranged at intervals along the first direction. The maximum thickness of the fins along the first direction is less than the minimum distance between adjacent fins, which improves the heat dissipation effect of the fins, reduces the temperature of the current needle, and further reduces the temperature of the battery.

[0007] In some embodiments, the ratio of the thickness of the fins along the first direction to the distance between adjacent fins is greater than or equal to 0.3 and less than or equal to 0.8. The ratio of the thickness of the fins to the distance between adjacent fins is set within a suitable range to further improve the heat dissipation effect of the fins and further reduce the temperature of the battery.

[0008] In some embodiments, the thickness of the fin along the first direction is greater than or equal to 0.6 mm and less than or equal to 0.8 mm, and the spacing between two adjacent fins along the first direction is greater than or equal to 1 mm and less than or equal to 2 mm. Thus, more fins can be arranged as much as possible, and there is enough space between the fins for air flow, thereby improving the heat dissipation effect of the fins.

[0009] In some embodiments, the thickness of the fins of the first heat dissipation member along the first direction is less than the thickness of the fins of the second heat dissipation member along the first direction. By setting the thicknesses of the fins of the first heat dissipation member and the second heat dissipation member differently, the heat dissipation requirements of each can be met, and the processing cost of the fins can be reduced.

[0010] In some embodiments, along a plane perpendicular to the first direction, the cross-sectional area of the head is greater than the cross-sectional area of the rod portion. The projected shapes of the first heat dissipation member and the second heat dissipation member are both circular rings, and the outer diameter of the first heat dissipation member is equal to the outer diameter of the second heat dissipation member; the spacing between two adjacent fins of the first heat dissipation member is less than the spacing between two adjacent fins of the second heat dissipation member. By reducing the spacing between two adjacent fins of the first heat dissipation member, more fins can be arranged within a certain space, thereby increasing the effective heat dissipation area of the first heat dissipation member to meet the heat dissipation requirements of the head.

[0011] In some embodiments, the heat dissipation probe further includes a voltage needle and a first elastic member. The current needle has a hollow inner cavity, the voltage needle is movably disposed in the inner cavity of the current needle along the first direction, and one end of the voltage needle is connected to the second end of the rod portion through the first elastic member. The first elastic member can buffer, protect, and reset the voltage needle.

[0012] In some embodiments, the heat dissipation probe further includes an insulating sleeve. The insulating sleeve is sleeved on the surface of the voltage needle to insulate the voltage needle from the current needle. While insulating the voltage needle from the current needle, the insulating sleeve also fixes and supports the voltage needle.

[0013] In some embodiments, the heat dissipation probe further includes a bracket and a second elastic member. The rod portion of the current needle is connected to the bracket through the second elastic member so that the current needle can move relative to the bracket along the first direction. The second elastic member can buffer, protect, and reset the current needle.

[0014] An embodiment of the second aspect of the present application provides a charging and discharging device, which includes the heat dissipation probe in the above embodiment.

[0015] The above description is only an overview of the technical solution of this application. In order to better understand the technical means of this application, it can be implemented according to the content of the description. And in order to make the above and other purposes, features and advantages of this application more obvious and understandable, the following specifically gives the specific implementation manners of this application. Description of the Drawings

[0016] In the drawings, unless otherwise specified, the same reference numerals throughout the several views denote the same or similar components or elements. These drawings are not necessarily drawn to scale. It should be understood that these drawings only depict some embodiments disclosed in accordance with this application and should not be regarded as limiting the scope of this application.

[0017] Figure 1 Schematic diagram of the overall structure of the heat dissipation probe according to some embodiments of this application;

[0018] Figure 2 Schematic diagram of the exploded structure of the heat dissipation probe according to some embodiments of this application;

[0019] Figure 3 Schematic diagram of the structures of the first heat dissipation member and the second heat dissipation member according to some embodiments of this application;

[0020] Figure 4 Schematic diagram of the partial structure of the heat dissipation probe according to some embodiments of this application;

[0021] Figure 5 Schematic diagram of the flow chart of the usage method of the heat dissipation probe according to some embodiments of this application;

[0022] Figure 6 Schematic diagram of the structure of the heat dissipation probe cooperating with the battery according to some embodiments of this application.

[0023] Description of the Reference Numerals:

[0024] 1. Heat dissipation probe;

[0025] 10. Current needle; 101. Rod body part; 102. Head;

[0026] 11. First heat dissipation member;

[0027] 12. Second heat dissipation member; 121. Fin;

[0028] 13. Voltage needle; 14. First elastic member; 15. Insulating sleeve; 16. Front rubber sleeve; 17. Rear rubber sleeve; 18. Bracket; 19. Second elastic member; 20. Wiring terminal; 21. First nut; 22. Spring washer; 23. Flat washer; 24. Second nut;

[0029] F1. First direction;

[0030] 2. Terminal post;

[0031] 3. Explosion-proof valve. Specific implementation manners

[0032] The embodiments of the technical solution of the present application will be described in detail below with reference to the accompanying drawings. The following embodiments are only used to illustrate the technical solution of the present application more clearly, and therefore are only examples and cannot be used to limit the protection scope of the present application.

[0033] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those of ordinary skill in the technical field to which this application belongs; the terms used herein are only for the purpose of describing specific embodiments and are not intended to limit this application; the terms "including" and "having" and any variations thereof in the specification and claims of this application and the above drawings are intended to cover non-exclusive inclusion.

[0034] In the description of the embodiments of this application, technical terms such as "first" and "second" are only used to distinguish different objects and cannot be understood as indicating or implying relative importance or implicitly indicating the quantity, specific order or primary-secondary relationship of the indicated technical features. In the description of the embodiments of this application, "a plurality of" means two or more, unless otherwise specifically and clearly defined.

[0035] Referring to "embodiments" herein means that the specific features, structures or characteristics described in connection with the embodiments can be included in at least one embodiment of this application. The phrase appears in various places in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment mutually exclusive with other embodiments. Those skilled in the art explicitly and implicitly understand that the embodiments described herein can be combined with other embodiments.

[0036] In the description of the embodiments of this application, the term "and / or" is only a description of the association relationship of associated objects, indicating that three relationships can exist. For example, A and / or B can represent: A exists alone, A and B exist simultaneously, and B exists alone. In addition, the character " / " in this article generally represents an "or" relationship between the associated objects before and after.

[0037] In the description of the embodiments of this application, the term "a plurality of" refers to two or more (including two). Similarly, "a plurality of groups" refers to two or more groups (including two groups), and "a plurality of pieces" refers to two or more pieces (including two pieces).

[0038] In the description of the embodiments of the present application, the orientation or positional relationship indicated by technical terms such as "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the embodiments of the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the embodiments of the present application.

[0039] In the description of the embodiments of the present application, unless otherwise clearly specified and limited, technical terms such as "installation", "connection", "connection", "fixation", etc. should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can also be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and can be the communication inside two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the embodiments of the present application can be understood according to specific circumstances.

[0040] Currently, from the perspective of the development of the market situation, the application of batteries is becoming more and more extensive. Batteries are not only used in energy storage power systems such as hydropower, thermal power, wind power, and solar power stations, but also widely used in electric vehicles such as electric bicycles, electric motorcycles, and electric vehicles, as well as in multiple fields such as aerospace. With the continuous expansion of the application fields of batteries, the market demand is also continuously increasing.

[0041] With the increase in the energy density of batteries, it is an inevitable way for the industry to achieve high-efficiency charging and discharging operations using high currents. During charging and discharging, the probe is contacted and electrically connected to the pole column of the battery, and current is transmitted between the probe and the pole column. Due to the high current, a large amount of heat is generated on the probe, and the heat is transferred to the battery, which will cause the battery temperature to rise. On the one hand, the excessive temperature will cause certain damage to the battery. On the other hand, the excessive temperature will lead to certain safety hazards during the charging and discharging process.

[0042] Based on the above considerations, the present application provides a heat dissipation probe and a charging and discharging device. The heat dissipation probe includes a current needle, a first heat dissipation member and a second heat dissipation member arranged in sequence along a first direction. The current needle includes a rod body portion extending along the first direction and a head connected to the first end of the rod body portion. The first heat dissipation member is sleeved on the surface of the head and is in thermal conduction connection with the head. The second heat dissipation member is sleeved on the surface of one end of the rod body portion close to the head and is in thermal conduction connection with the rod body portion.

[0043] Thus, by providing the first heat dissipation member to take away the heat from the head and the second heat dissipation member to take away the heat from one end of the rod body near the head, it is possible to take away as much heat as possible generated during the operation of the current needle, so as to reduce the phenomenon of heat transfer to the battery, and further reduce the temperature of the battery during charging and discharging as much as possible, reducing the problems of battery damage and safety hazards caused by overheating. At the same time, by sleeving the first heat dissipation member and the second heat dissipation member on the current needle, the corresponding first heat dissipation member and second heat dissipation member can be replaced according to different heat dissipation requirements to meet the charging and discharging conditions of various current values, improving the versatility of the heat dissipation probe.

[0044] The heat dissipation probe disclosed in the embodiments of the present application can be used for charging and discharging during the battery production test process, and can also be used for charging and discharging during the actual use of the battery. The charging and discharging device can be composed of the heat dissipation probes disclosed in the present application. In this way, it is beneficial to the effective heat dissipation of the current needle, reduces the temperature of the battery during charging and discharging, and reduces the problems of battery damage and safety hazards caused by overheating.

[0045] As Figures 1 to 4 shown, Figure 1 is a schematic diagram of the overall structure of the heat dissipation probe according to some embodiments of the present application; Figure 2 is an exploded structural schematic diagram of the heat dissipation probe according to some embodiments of the present application; Figure 3 is a structural schematic diagram of the first heat dissipation member and the second heat dissipation member according to some embodiments of the present application; Figure 4 is a partial structural schematic diagram of the heat dissipation probe according to some embodiments of the present application.

[0046] The embodiments of the present application provide a heat dissipation probe 1, including a current needle 10, a first heat dissipation member 11 and a second heat dissipation member 12 arranged in sequence along a first direction F1. The current needle 10 includes a rod body portion 101 extending along the first direction and a head portion 102 connected to the first end of the rod body portion 101. One end of the head portion 102 away from the rod body portion 101 is used to contact the electrode post of the battery. The first heat dissipation member 11 is sleeved on the surface of the head portion 102 and is in thermal conduction connection with the head portion 102. The second heat dissipation member 12 is sleeved on the surface of one end of the rod body portion 101 near the head portion 102 and is in thermal conduction connection with the rod body portion 101.

[0047] The current needle 10 is a component for passing current. The head portion 102 refers to the part where the current needle 10 directly contacts the battery electrode post. The rod body portion 101 is a component that realizes the electrical connection between the head portion 102 and the power supply device or the electrical device. During charging, the second end of the rod body portion 101 is used to be electrically connected to the power supply device. During discharging, the second end of the rod body portion 101 is used to be electrically connected to the electrical device.

[0048] The first heat sink 11 and the second heat sink 12 are components used to take away the heat generated when the current pin 10 works. When the current pin 10 works, the main parts where heat is concentrated are the head 102 and one end of the rod body 101 close to the head 102. The first heat sink 11 is used to reduce the temperature of the head 102, and the second heat sink 12 is used to reduce the temperature of one end of the rod body 101 close to the head 102. The first heat sink 11 can be in contact connection with the second heat sink 12. In some embodiments, the first heat sink 11 and the second heat sink 12 can be heat dissipation fins, and the heat dissipation fins can increase the contact area with the air, allowing the air to take away the heat generated when the current pin 10 works more quickly.

[0049] By setting the first heat sink 11 to take away the heat of the head 102 and the second heat sink 12 to take away the heat of one end of the rod body 101 close to the head 102, it is possible to take away as much heat as possible generated when the current pin 10 works, so as to reduce the phenomenon of heat transfer to the battery, and further reduce the temperature of the battery during charging and discharging as much as possible, reducing the problems of battery damage and potential safety hazards caused by excessive temperature. At the same time, by sleeving the first heat sink 11 and the second heat sink 12 on the current pin 10, the corresponding first heat sink 11 and second heat sink 12 can be replaced according to different heat dissipation requirements to meet the charging and discharging conditions of various current values, improving the versatility of the heat dissipation probe 1.

[0050] As Figure 3 shown, according to some embodiments of the present application, both the first heat sink 11 and the second heat sink 12 include a plurality of fins 121 arranged at intervals along the first direction F1, and the maximum thickness H of the fins 121 along the first direction F1 is less than the minimum distance L between adjacent two fins 121.

[0051] Appropriately reducing the thickness H of the fins 121 is beneficial to improving the heat dissipation effect, but if the thickness of the fins 121 is too small, it will increase the processing cost of the fins. And appropriately increasing the thickness H of the fins 121 is beneficial to the processing of the fins 121, but if the thickness of the fins 121 is too large, it is not conducive to heat dissipation. Appropriately reducing the distance between the fins 121 is beneficial to arranging a larger number of fins 121, thereby increasing the heat dissipation area and further facilitating heat dissipation, but if the distance is too small, it is not conducive to the flow of air. And appropriately increasing the distance between the fins 121 is beneficial to the flow of air between adjacent two fins 121, thereby facilitating heat dissipation, but if the distance is too large, the number of fins 121 will be small and the heat dissipation area will be small.

[0052] In some embodiments, the projection shape of the fins 121 on a plane parallel to the first direction F1 is rectangular, then the fins 121 have a uniform thickness value, and there is a uniform distance value between adjacent two fins 121.

[0053] It can be understood that the working temperature of the current needle mainly refers to the heat generated by the contact resistance. The lower the working temperature of the current needle, the greater the temperature difference between the current needle and the battery, and the more heat is dissipated from the battery through the heat dissipation probe, which is more conducive to reducing the temperature inside the battery.

[0054] In some embodiments, the working temperature T2 of the current needle can be obtained through the following calculation formula:

[0055]

[0056] In the above formula, I is the current passing through the current needle, R is the contact impedance between the current needle and the terminal post, h is the convective heat transfer coefficient on the air side, A is the surface area of the fin, ΔT1 is the temperature difference between the surface of the current needle and the convective air (which can be obtained through simulation calculation), t is the operating duration, C P is the heat capacity, m is the mass of the fin, and T1 is the initial temperature of the current needle.

[0057] It can be seen from the above formula that, when the material of the heat dissipation probe remains unchanged, the working temperature can be reduced by increasing the surface area of the fin or the convective heat transfer coefficient on the air side. The surface area of the fin is related to the thickness H of the fin and the distance L between adjacent fins. The convective heat transfer coefficient on the air side is related to the size of the distance L between adjacent fins. If L is too large, it may lead to a smaller number of fins, and thus a smaller heat dissipation area. If L is too small, it will lead to a decrease in the convective heat transfer coefficient on the air side.

[0058] In some embodiments, when the total height of the first heat dissipation member 11 and the second heat dissipation member 12 is less than or equal to 30 mm, different fin thickness values and spacing values are selected for testing. For example, at an ambient temperature of 25 degrees Celsius, the outer diameters of the first heat dissipation member and the second heat dissipation member are both 35 mm. The heat dissipation probe is brought into contact with the terminal posts of multiple battery cells in the battery pack and charged at a charging rate of 1.5C. The temperature detection data inside the battery pack containing multiple battery cells is shown in Table 1 below. The battery pack includes multiple battery cells, where the highest temperature refers to the highest temperature among multiple battery cells in the battery pack during a charging cycle, and the maximum temperature difference refers to the maximum temperature difference between individual battery cells in the battery pack.

[0059] Among them, the highest battery temperature can be detected by setting a temperature sensor inside the battery. In some embodiments, the battery management system can receive the temperature value detected by the temperature sensor inside the battery.

[0060] Table 1

[0061]

[0062] As can be seen from Table 1, compared with the case where the thickness of the fin is greater than the distance between two adjacent fins, when the thickness of the fin is less than the distance between two adjacent fins, both the maximum temperature of the battery and the maximum temperature difference of the battery are smaller.

[0063] By setting the thickness H of the fin 121 to be less than the distance L between two adjacent fins 121, the heat dissipation effect of the fin 121 is improved, the temperature of the current pin 10 is reduced, and thus the temperature of the battery is reduced.

[0064] According to some embodiments of the present application, the ratio of the thickness H of the fin 121 in the first direction F1 to the distance L between two adjacent fins 121 is greater than or equal to 0.3 and less than or equal to 0.8.

[0065] In some embodiments, the ratio of the thickness H of the fin 121 in the first direction F1 to the distance L between two adjacent fins 121 may be 0.3, 0.4, 0.5, 0.6, 0.7, or 0.8.

[0066] Combined with Table 1, it can be seen that when the ratio of the thickness H to the distance L is too large or too small, for example, greater than 0.8 or less than 0.3, both the maximum temperature of the battery and the maximum temperature difference of the battery will be larger, indicating that the heat dissipation of the current pin 10 is poor.

[0067] By setting the ratio of the thickness H of the fin 121 to the distance L between two adjacent fins 121 within a suitable range, the heat dissipation effect of the fin 121 is further improved, and thus the temperature of the battery is reduced.

[0068] According to some embodiments of the present application, the thickness H of the fin 121 in the first direction F1 is greater than or equal to 0.6 mm and less than or equal to 0.8 mm, and the distance L between two adjacent fins 121 in the first direction F1 is greater than or equal to 1 mm and less than or equal to 2 mm.

[0069] As shown in Table 1, if the distance L between two adjacent fins 121 in the first direction F1 is too large or too small, it is not conducive to the heat dissipation during the battery charging process.

[0070] In some embodiments, when the total height of the first heat dissipation member 11 and the second heat dissipation member 12 is less than or equal to 30 mm, the maximum outer diameter of the fins is 35 mm, the spacing between adjacent fins is 2.5 mm, and the ambient temperature is 25 °C, the heat dissipation probe is connected to the positive and negative electrode posts of a single battery cell, and charging is carried out at a charging rate of 1.5C. The highest temperature, temperature rise, highest temperature of the heat dissipation probe, and cost of the battery cell corresponding to fins of different thicknesses during the charging process are shown in the following table. Among them, the highest temperature of the battery cell refers to the highest temperature value inside the battery cell during a charging cycle (i.e., the state of charge from 0 to 100%), the temperature rise of the battery cell refers to the maximum difference in the internal temperature fluctuation of the battery cell during a charging cycle, the highest temperature of the heat dissipation probe refers to the highest temperature of the heat dissipation probe itself during a charging cycle, and the cost refers to the manufacturing cost of the heat dissipation probe corresponding to the fin thickness. Among them, A refers to the manufacturing cost of a conventional probe without fins.

[0071] Table 2

[0072]

[0073] As can be seen from Table 2, the smaller the thickness H of the fins, the smaller the temperature rise and the highest temperature of the battery cell during charging, which means better heat dissipation effect. However, when the thickness is less than 0.6 mm, it will cause a significant increase in the processing cost of the heat dissipation probe, which is instead not conducive to the economy of the heat dissipation probe. Based on this, limiting the thickness H of the fins 121 in the first direction F1 to be greater than or equal to 0.6 mm and less than or equal to 0.8 mm can balance the heat dissipation effect and manufacturing cost of the heat dissipation probe.

[0074] The larger the spacing L between two adjacent fins 121, the more conducive it is to ventilation and heat dissipation, but it will lead to a reduction in the number of fins that can be arranged, thereby affecting the heat dissipation area. The smaller the spacing L, the more it will affect the convective heat transfer coefficient, thereby suppressing the heat dissipation effect. Moreover, too small a spacing L will also cause processing difficulties and cost increase. It can be seen from Table 1 that when the thickness H of the fins 121 is 0.6 mm and the spacing L between two adjacent fins 121 is between 1 mm and 2 mm, the highest temperature and the maximum temperature difference of the battery cell are relatively small, indicating that the first heat dissipation member 11 and the second heat dissipation member 12 can achieve good heat dissipation effects.

[0075] By setting the thickness H of the fins 121 between 0.6 mm and 0.8 mm, it is beneficial to both reducing the processing cost of the fins 121 and improving the heat dissipation efficiency of the fins 121; setting the spacing between two adjacent fins 121 between 1 mm and 2 mm can not only arrange as many fins 121 as possible, but also provide enough space for air flow between the fins 121, thereby improving the heat dissipation effect of the fins.

[0076] According to some embodiments of the present application, the thickness H of the fins 121 of the first heat dissipation member 11 along the first direction F1 is less than the thickness H of the fins 121 of the second heat dissipation member 12 along the first direction F1.

[0077] The diameter of the head 102 is not equal to the diameter of the rod body portion 101. During the charging and discharging process, the part in contact with the terminal post is the head 102, and the heat generation of the head 102 is relatively large, that is, the heat dissipation requirement of the head 102 is relatively large. By reducing the thickness of the fins 121 of the first heat dissipation member 11, it is beneficial to improve the heat dissipation effect of the first heat dissipation member 11. For the rod body portion 101, the heat generation is relatively small, that is, the heat dissipation requirement of the rod body portion 101 is relatively small. Fins 121 with a relatively large thickness can be selected, which can not only meet the heat dissipation requirement but also reduce the processing cost of the fins 121.

[0078] By differentially setting the thickness H of the fins 121 of the first heat dissipation member 11 and the thickness of the fins 121 of the second heat dissipation member 12, it is possible to not only meet their respective heat dissipation requirements but also reduce the processing cost of the fins 121.

[0079] According to some embodiments of the present application, as Figures 1 to 3 shown, in a plane perpendicular to the first direction F1, the cross-sectional area of the head 102 is larger than the cross-sectional area of the rod body portion 101. The projected shapes of the first heat dissipation member 11 and the second heat dissipation member 12 are both circular rings, and the outer diameter of the first heat dissipation member 11 is equal to the outer diameter of the second heat dissipation member 12; the distance between two adjacent fins of the first heat dissipation member 11 is less than the distance between two adjacent fins of the second heat dissipation member 12.

[0080] The diameter of the head 102 is larger than the diameter of the rod body portion 101. In the case where the outer diameters of the first heat dissipation member 11 and the second heat dissipation member 12 are equal, the effective heat dissipation area of the first heat dissipation member 11 sleeved on the head 102 is smaller than the effective heat dissipation area of the second heat dissipation member 12 sleeved on the rod body portion 101.

[0081] By reducing the distance between two adjacent fins 121 of the first heat dissipation member 11, more fins 121 can be arranged within a certain space, thereby increasing the effective heat dissipation area of the first heat dissipation member 11 to meet the heat dissipation requirement of the head 102.

[0082] As Figure 1 、 Figure 2 and Figure 4 shown, according to some embodiments of the present application, the heat dissipation probe 1 further includes a voltage pin 13 and a first elastic member 14. The current pin 10 has a hollow inner cavity, the voltage pin 13 is movably arranged in the inner cavity of the current pin 10 along the first direction F1, and one end of the voltage pin 13 is connected to the second end of the rod body portion 101 through the first elastic member 14.

[0083] The other end of the voltage pin 13 extends to the head 102 and extends beyond the end face of the head 102 that contacts the terminal post. In some embodiments, the first elastic member 14 can be a spring. During the contact process between the terminal post and the head 102, the voltage pin 13 first contacts the head, and the spring is compressed by the force, thereby playing a role in buffering and protecting the voltage pin 13. After the charge and discharge are completed and the battery is removed, the voltage pin 13 is separated from the terminal post, and the spring drives the voltage pin 13 to reset.

[0084] By providing the first elastic member 14, it is possible to buffer and protect the voltage pin 13 and reset it.

[0085] As Figure 2 shown, according to some embodiments of the present application, the heat dissipation probe 1 further includes an insulating sleeve 15, and the insulating sleeve 15 is sleeved on the surface of the voltage pin 13 so that the voltage pin 13 is insulated from the current pin 10.

[0086] In some embodiments, one end of the voltage pin 13 is also fixed to the second end of the rod body portion 101 through a front rubber sleeve 16 and a rear rubber sleeve 17, so that the voltage pin 13 can move within the current pin 10.

[0087] By providing the insulating sleeve 15, while the insulating sleeve 15 plays a role in insulating the voltage pin 13 from the current pin 10, it also plays a role in fixing and supporting the voltage pin 13.

[0088] As Figure 1 、 Figure 2 and Figure 4 shown, according to some embodiments of the present application, the heat dissipation probe 1 further includes a bracket 18 and a second elastic member 19. The rod body portion 101 of the current pin 10 is connected to the bracket 18 through the second elastic member 19 so that the current pin 10 can move relative to the bracket 18 along the first direction F1.

[0089] In some embodiments, the second elastic member 19 can be a spring, and the bracket 18 is fixed. When charging and discharging are required, the battery is driven to move toward the side close to the current pin 10. When the terminal post contacts the current pin 10, the spring is compressed by the force, thereby playing a role in buffering and protecting the current pin 10. After the charge and discharge are completed, the battery is driven to move away from the side of the current pin 10, the terminal post is separated from the current pin 10, and the spring drives the current pin 10 to reset.

[0090] In some embodiments, the second end of the rod body portion 101 is provided with a thread, and the wiring terminal 20, the first nut 21, the spring washer 22, the flat washer 23, and the second nut 24 are sequentially arranged on the second end of the rod body portion 101 along the first direction F1.

[0091] By providing the second elastic member 19, it is possible to buffer and protect the current pin 10 and reset it.

[0092] An embodiment of the present application provides a charging and discharging device, including the heat dissipation probe 1 of any of the above embodiments.

[0093] As Figure 6 shown, Figure 6 It is a schematic structural diagram of the heat dissipation probe 1 cooperating with the battery in some embodiments of the present application. The battery includes a positive electrode terminal and a negative electrode terminal. The charging and discharging device includes two heat dissipation probes 1 respectively contacting the positive electrode terminal and the negative electrode terminal. The head of the heat dissipation probe 1 contacts the terminal 2. The maximum outer diameter of the heat dissipation probe 1 is the larger of the maximum outer diameters of the first heat dissipation member 11 and the second heat dissipation member 12.

[0094] The outer diameter of the heat dissipation probe 1 needs to be greater than the size of the terminal 2, that is, the heat dissipation probe 1 needs to be able to completely cover the terminal 2, and a certain safety margin s needs to be reserved between the heat dissipation probe 1 and the explosion-proof valve 3.

[0095] The charging and discharging device in this embodiment can have all the beneficial effects of the above heat dissipation probe 1, which will not be elaborated here.

[0096] Next, in conjunction with Figures 1 to 5 a further detailed description of the embodiments of the present application will be made. Figure 5 It is a schematic flowchart of the usage method of the heat dissipation probe in some embodiments of the present application.

[0097] The heat dissipation probe 1 includes a current needle 10 extending along the first direction F1, a first heat dissipation member 11, and a second heat dissipation member 12. The current needle 10 includes a rod body portion 101 and a head 102 connected to the first end of the rod body portion 101. The first heat dissipation member 11 is sleeved on the head 102 and is detachably connected to the head 102. The second heat dissipation member 12 is sleeved on one end of the rod body portion 101 close to the head 102 and is detachably connected to the rod body portion 101. The thickness H of the fins 121 on the first heat dissipation member 11 and the second heat dissipation member 12 is 0.6 mm, the distance L between two adjacent fins 121 is 1.5 mm, and the total number of fins 121 is 15.

[0098] The heat dissipation probe 1 further includes a voltage needle 13 disposed in the current needle 10. One end of the voltage needle 13 is connected to the second end of the rod body portion 101 through a small spring. An insulating sleeve 15 is also sleeved on the voltage needle 13 to insulate the voltage needle 13 and the current needle 10. One end of the voltage needle 13 is also fixed to the second end of the rod body portion 101 through a front rubber sleeve 16 and a rear rubber sleeve 17, so that the voltage needle 13 can move within the current needle 10.

[0099] The heat dissipation probe 1 further includes a bracket 18 sleeved on the rod body portion 101. A large spring is arranged between the bracket 18 and the head 102, and the rod body portion 101 is connected to one end of the bracket 18 through the large spring. The second end of the rod body portion 101 is provided with a thread, and the wiring terminal 20, the first nut 21, the spring washer 22, the flat washer 23 and the second nut 24 are sequentially arranged on the second end of the rod body portion 101 along the first direction F1.

[0100] The using process of the heat dissipation probe 1 is as follows: The bracket 18 is fixed. The battery moves upward and gradually approaches the heat dissipation probe 1 until the pole column contacts the voltage needle 13 and the current needle 10. Both the large spring and the small spring are compressed, and the charge and discharge operation starts. The current passes through the current needle 10, and the current needle 10 generates heat. The heat is transferred to the fin 121, and the air flow flows between two adjacent fins 121, and the heat is carried away by the air flow. The temperature of the current needle 10 decreases. After the charge and discharge are completed, the battery is removed, the large spring drives the current needle 10 to reset, and the small spring drives the voltage needle 13 to reset.

[0101] Finally, it should be noted that: The above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them; Although the present application has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: They can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements on some or all of the technical features; And these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application, and they should all be covered within the scope of the claims and the description of the present application. In particular, as long as there is no structural conflict, the various technical features mentioned in each embodiment can be combined in any way. The present application is not limited to the specific embodiments disclosed in the text, but includes all technical solutions falling within the scope of the claims.

Claims

1. A heat dissipation probe, characterized in that, Comprising: A current needle, the current needle comprising a rod portion extending in a first direction and a head connected to a first end of the rod portion, and an end of the head remote from the rod portion being adapted to contact a pole of a battery; A first heat sink and a second heat sink arranged in sequence along the first direction, the first heat sink being sleeved on a surface of the head and being in heat conduction connection with the head; The second heat sink is sleeved on a surface of an end of the rod portion close to the head and is in heat conduction connection with the rod portion.

2. The heat dissipation probe according to claim 1, wherein Both the first heat sink and the second heat sink include a plurality of fins arranged at intervals along the first direction; A maximum thickness of the fins along the first direction is less than a minimum distance between two adjacent fins.

3. The heat dissipation probe according to claim 2, wherein A ratio of a thickness of the fins along the first direction to a distance between two adjacent fins is greater than or equal to 0.3 and less than or equal to 0.

8.

4. The heat dissipation probe according to claim 2, characterized in that, The thickness of the fins along the first direction is greater than or equal to 0.6 mm and less than or equal to 0.8 mm, and a distance between two adjacent fins along the first direction is greater than or equal to 1 mm and less than or equal to 2 mm.

5. The heat dissipation probe according to claim 2, characterized in that, A thickness of the fins of the first heat sink along the first direction is less than a thickness of the fins of the second heat sink along the first direction.

6. The heat dissipation probe according to any one of claims 2 to 5, characterized in that, In a plane perpendicular to the first direction, a cross-sectional area of the head is greater than a cross-sectional area of the rod portion, a projected shape of the first heat sink and a projected shape of the second heat sink are both annular, and an outer diameter of the first heat sink is equal to an outer diameter of the second heat sink; A distance between two adjacent fins of the first heat sink is less than a distance between two adjacent fins of the second heat sink.

7. The heat dissipation probe according to any one of claims 1 to 5, characterized in that The heat dissipation probe further comprises: a voltage needle and a first elastic member; The current needle has a hollow inner cavity, the voltage needle is movably arranged in the inner cavity of the current needle along the first direction, and one end of the voltage needle is connected to a second end of the rod portion through the first elastic member.

8. The heat dissipation probe according to claim 7, characterized in that The heat dissipation probe further comprises: an insulating sleeve; The insulating sleeve is sleeved on a surface of the voltage needle so that the voltage needle is insulated from the current needle.

9. The heat dissipation probe according to any one of claims 1 to 5, characterized in that The heat dissipation probe further comprises: a bracket and a second elastic member; The rod portion of the current needle is connected to the bracket through the second elastic member so that the current needle can move relative to the bracket along the first direction.

10. A charge and discharge device, characterized in that, Comprising the heat dissipation probe according to any one of claims 1 to 9.

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