A high-power lithium battery charger and its heat dissipation method

Abstract

The present application relates to the technical field of lithium battery charging, and provides a high-power lithium battery charger and a heat dissipation method thereof. The high-power lithium battery charger includes a charger body, and a multi-heat pipe redundant heat dissipation module is provided in the charger body. The multi-heat pipe redundant heat dissipation module includes multiple first heat pipes, multiple second heat pipes, multiple third heat pipes and multiple fourth heat pipes; the multiple first heat pipes cover the heat generation area in the charger body in a cross-network form, and each cross node between the first heat pipes corresponds to each heat source in the heat generation area; any heat source in the heat generation area is also connected to at least one second heat pipe; the multiple third heat pipes are vertically connected to the multiple cross nodes one by one, and the multiple fourth heat pipes are also connected to the multiple third heat pipes in a cross-network form; a redundant heat dissipation layout is formed, which helps to improve the heat dissipation reliability and heat dissipation efficiency, thereby effectively avoiding the risk of overall heat dissipation failure.

Description

Technical Field

[0001] This application relates to the technical field of lithium battery charging, and more specifically, to a high-power lithium battery charger and its heat dissipation method. Background Art

[0002] The heat dissipation problem of lithium battery chargers is mainly caused by charger overload or excessive current. When the charger cannot stabilize the voltage or cannot effectively dissipate heat in the later stage of charging, it will cause the battery to overheat, which is likely to affect the battery performance. With the continuous expansion of the application fields of lithium battery chargers, the application of high-power lithium battery chargers is becoming more and more common. However, in the prior art, the heat dissipation methods for high-power lithium battery chargers mostly rely on built-in cooling fans. Although the built-in cooling fans can accelerate heat dissipation and improve charging efficiency, in extremely high-temperature environments, their heat dissipation effects may not meet expectations, and the battery may still overheat. There is a lack of an effective redundant heat dissipation mechanism. Once the cooling fan fails due to a malfunction, it is even more difficult to achieve the expected heat dissipation effect. Summary of the Invention

[0003] The technical problem to be solved by this application is to provide a high-power lithium battery charger and its heat dissipation method in view of the above-mentioned defects of the prior art.

[0004] The technical solution adopted by this application to solve its technical problems is as follows:

[0005] On the one hand, this application provides a high-power lithium battery charger, including a charger body. A multi-heat pipe redundant heat dissipation module is provided inside the charger body. The multi-heat pipe redundant heat dissipation module includes multiple first heat pipes, multiple second heat pipes, multiple third heat pipes, and multiple fourth heat pipes. Multiple first heat pipes cover the heat generation area inside the charger body in a cross-network form, and each cross node between the first heat pipes corresponds to each heat source in the heat generation area. Any heat source in the heat generation area is also connected to at least one second heat pipe. Multiple third heat pipes are vertically connected to multiple cross nodes one by one, and multiple fourth heat pipes are also connected to multiple third heat pipes in a cross-network form.

[0006] In some embodiments, the multi-heat pipe redundant heat dissipation module further includes a copper block and a heat spreader. The copper block and the heat spreader are respectively connected to the heat sources in the heat generation area through heat-conducting materials. The cross nodes are connected to the heat spreader, and the second heat pipes are connected to the copper block.

[0007] In some embodiments, the cross angle between two cross-arranged first heat pipes is 20-90°; the cross angle between the cross-arranged third heat pipes and fourth heat pipes is 90°.

[0008] In some embodiments, the multi-heat pipe redundant heat dissipation module further includes a plurality of first heat dissipation aluminum sheets arranged in different orientations. Any one of the first heat dissipation aluminum sheets is connected to the ends of multiple first heat pipes on the corresponding side. On one surface of any one of the first heat dissipation aluminum sheets facing away from the corresponding first heat pipe, a plurality of densely distributed first heat dissipation fins are provided. The intervals between the adjacent ends of any two first heat pipes on the same side are the same.

[0009] In some embodiments, the multi-heat pipe redundant heat dissipation module further includes a plurality of second heat dissipation aluminum sheets arranged in different orientations. Any one of the second heat dissipation aluminum sheets is connected to the ends of multiple second heat pipes on the corresponding side. On one surface of any one of the second heat dissipation aluminum sheets facing away from the corresponding second heat pipe, a plurality of densely distributed second heat dissipation fins are provided.

[0010] In some embodiments, the multi-heat pipe redundant heat dissipation module further includes a plurality of third heat dissipation aluminum sheets and a plurality of fourth heat dissipation aluminum sheets arranged in different orientations. Any one of the third heat dissipation aluminum sheets is connected to the ends of multiple third heat pipes on the corresponding side. On one surface of any one of the third heat dissipation aluminum sheets facing away from the corresponding third heat pipe, a plurality of densely distributed third heat dissipation fins are provided. Any one of the fourth heat dissipation aluminum sheets is connected to the ends of multiple fourth heat pipes on the corresponding side. On one surface of any one of the fourth heat dissipation aluminum sheets facing away from the corresponding fourth heat pipe, a plurality of densely distributed fourth heat dissipation fins are provided.

[0011] In some embodiments, the spacing between any two adjacent first heat dissipation fins, second heat dissipation fins, third heat dissipation fins, and fourth heat dissipation fins is not less than 6 mm.

[0012] In some embodiments, a plurality of heat dissipation fans are further provided in the charger body and arranged in different orientations. Any one of the heat dissipation fans corresponds to the first heat dissipation fins, second heat dissipation fins, third heat dissipation fins, or fourth heat dissipation fins on the corresponding side. A plurality of air inlets and air outlets for the corresponding plurality of heat dissipation fans to intake and exhaust air are provided on the charger body.

[0013] On the other hand, the present application further provides a heat dissipation method for a high-power lithium battery charger, which is applied to the high-power lithium battery charger described in any one of the above. The method includes:

[0014] Setting a temperature grading control mode, the temperature grading control mode includes a low-load mode, a medium-load mode, and a high-load mode. Among them, the temperature in the low-load mode is less than 60 °C, the temperature in the medium-load mode is greater than or equal to 60 °C and less than 80 °C, and the temperature in the high-load mode is greater than or equal to 80 °C.

[0015] Detect and obtain the dynamic temperature change data inside the charger body in real time through temperature sensing, and select a temperature grading control mode and its corresponding heat dissipation path according to the dynamic temperature change data;

[0016] Detect the working status of each of the first heat pipes or the second heat pipes in real time and determine whether there is a working failure. If so, start the redundant heat dissipation path.

[0017] In some embodiments, the method further includes:

[0018] Set an over-temperature protection mode, and the temperature threshold of the over-temperature protection mode is 95°C; if it is detected that the real-time temperature inside the charger body reaches 95°C, then forcefully reduce the charging power or cut off the output;

[0019] Prompt the failure of the first heat pipe or the second heat pipe through sound and light alarms, and start the redundant heat dissipation path.

[0020] The beneficial effects of this application are as follows: Different from the prior art, the high-power lithium battery charger of this application is provided with a multi-heat pipe redundant heat dissipation module inside the charger body. Among them, multiple first heat pipes cover the heat generation area inside the charger body in a cross-network form, having a large heat dissipation area. Each cross-node between the first heat pipes corresponds to each heat source in the heat generation area respectively, and the heat transfer effect is better; any heat source in the heat generation area is also connected to at least one second heat pipe, which can dissipate heat independently of each first heat pipe; multiple third heat pipes are vertically connected to multiple cross-nodes one by one, and multiple fourth heat pipes are also connected to multiple third heat pipes in a cross-network form, which can effectively expand the heat circulation path and space; a redundant heat dissipation layout is formed. If some of the first heat pipes fail, multi-path heat dissipation can still be achieved through other normally working first heat pipes in cooperation with the third heat pipes and fourth heat pipes at their corresponding cross-nodes and each second heat pipe, and vice versa, thus effectively avoiding the risk of overall heat dissipation failure and contributing to the improvement of heat dissipation reliability and heat dissipation efficiency. Description of the Drawings

[0021] Figure 1 is a schematic structural diagram of a multi-heat pipe redundant heat dissipation module in an embodiment of this application;

[0022] Figure 2 is an enlarged schematic structural diagram of part A in an embodiment of this application;

[0023] Figure 3 is a schematic structural diagram of a charger body in an embodiment of this application;

[0024] Figure 4 is a flowchart of the implementation of a heat dissipation method for a high-power lithium battery charger in an embodiment of this application;

[0025] Figure 5 It is another implementation flowchart of the heat dissipation method for a high-power lithium battery charger in the embodiments of this application. Detailed implementation manners

[0026] The terms "first", "second", "third", "fourth", etc. in the description and claims of this application and the accompanying drawings are used to distinguish different objects, rather than to describe a specific order. In addition, the terms "include" and "have" and any variations thereof are intended to cover non-exclusive inclusion. For example, a process, method, system, product, or device that includes a series of steps or units is not limited to the listed steps or units, but optionally further includes steps or units not listed, or optionally further includes other steps or units inherent to these processes, methods, products, or devices.

[0027] 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 will explicitly and implicitly understand that the embodiments described herein can be combined with other embodiments.

[0028] "Plurality" means two or more. "And / or" describes the association relationship of associated objects, indicating that there can be three relationships. For example, A and / or B can represent: A exists alone, A and B exist simultaneously, and B exists alone. The character " / " generally represents an "or" relationship between the associated objects before and after.

[0029] Moreover, the orientation terms such as "upper, lower, front, rear, left, right, upper end, lower end" are referenced based on the attitude position of the device or equipment described in this solution during normal use.

[0030] In order to make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions in the embodiments of this application will be described clearly and completely below. Obviously, the described embodiments are partial embodiments of this application, rather than all embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of this application without creative efforts fall within the protection scope of this application.

[0031] Example 1: The embodiments of this application provide a high-power lithium battery charger, such as Figures 1 to 3As shown in the figure, the high-power lithium battery charger includes a charger body 10. A multi-heat pipe redundant heat dissipation module is provided inside the charger body 10. The multi-heat pipe redundant heat dissipation module includes multiple first heat pipes 1, multiple second heat pipes 2, multiple third heat pipes 3, and multiple fourth heat pipes 4. The multiple first heat pipes 1 cover the heat generation area inside the charger body 10 in a cross-network form. Each cross node between the first heat pipes 1 corresponds to each heat source in the heat generation area respectively. Any heat source in the heat generation area is also connected to at least one second heat pipe 2. The multiple third heat pipes 3 are vertically connected to multiple cross nodes one by one, and the multiple fourth heat pipes 4 are also connected to the multiple third heat pipes 3 in a cross-network form.

[0032] In the high-power lithium battery charger according to the embodiment of the present application, the multiple first heat pipes 1 cross each other and cover the heat generation area in a network form, which can effectively expand the heat dissipation area. And the cross nodes correspond to the heat sources, and the heat sources are dissipated through the cross nodes in a targeted manner, and the heat transfer effect is better, which helps to improve the heat dissipation efficiency. Moreover, at least one second heat pipe 2 is directly connected to the corresponding heat source, which can also effectively dissipate the heat of the heat source independently. The multiple third heat pipes 3 are vertically connected to multiple cross nodes one by one, and the multiple fourth heat pipes 4 are also connected to the multiple third heat pipes 3 in a cross-network form, which can effectively expand the heat flow path and space; a redundant heat dissipation layout is formed. If some of the first heat pipes 1 fail, multi-path heat dissipation can still be achieved through other normally working first heat pipes 1, the third heat pipes 3 and the fourth heat pipes 4 at their corresponding cross nodes, and each second heat pipe 2, and vice versa, to ensure that there is always a normal redundant heat dissipation path to achieve heat dissipation.

[0033] It should be noted that in this embodiment, the heat generation area refers to the circuit board 20 provided inside the charger body 10 and its area, and the heat sources are the heat generating components on the circuit board 20, such as the transformer, IGBT module, etc. provided on the circuit board 20.

[0034] Specifically, in this embodiment, the multi-heat pipe redundant heat dissipation module further includes a copper block 5 and a heat dissipation plate 6. The copper block 5 and the heat dissipation plate 6 are respectively connected to the heat sources in the heat generation area through heat conductive materials. The cross nodes are connected to the heat dissipation plate 6, and the second heat pipes 2 are connected to the copper block 5. Among them, the heat conductive material is, for example, heat conductive glue. The cross nodes can be connected to the heat dissipation plate 6 by heat conductive glue or welding, and the second heat pipes 2 can also be connected to the copper block 5 by heat conductive glue or welding. The settings of the copper block 5 and the heat dissipation plate 6 help to conduct the heat generated by the heat sources step by step outwards.

[0035] Among them, the crossing angle between two crossed first heat pipes 1 is 20-90°; the crossing angle between the crossed third heat pipe 3 and the fourth heat pipe 4 is 90°, which helps to expand the heat dissipation space. For example, in this embodiment, the crossing angles between two crossed first heat pipes 1 and between the third heat pipe 3 and the fourth heat pipe 4 are both 90°. It can be understood that according to the different positions of the heat-generating components on the circuit board 20, the crossing angle between two crossed first heat pipes 1 should be such that the crossing nodes correspond to the heat-generating components. The angles set in this embodiment and shown in the drawings are only examples.

[0036] Specifically, in this embodiment, the multi-heat pipe redundant heat dissipation module further includes a plurality of first heat dissipation aluminum sheets 71 arranged in different orientations. Any one of the first heat dissipation aluminum sheets 71 is connected to the ends of multiple first heat pipes 1 on the corresponding side, so that the heat on the multiple first heat pipes 1 can converge on the corresponding first heat dissipation aluminum sheet 71. On one surface of any first heat dissipation aluminum sheet 71 facing away from the corresponding first heat pipe 1, a plurality of densely distributed first heat dissipation fins 711 are provided, which are used to promote the heat dissipation of the first heat dissipation aluminum sheet 71 and achieve a better heat dissipation effect. The intervals between adjacent ends of any two first heat pipes 1 on the same side are the same, so that the heat on the first heat pipes 1 can be evenly distributed on the first heat dissipation aluminum sheet 71, thereby avoiding the influence on the heat dissipation effect caused by local heat accumulation.

[0037] Furthermore, in this embodiment, the multi-heat pipe redundant heat dissipation module further includes a plurality of second heat dissipation aluminum sheets 72 arranged in different orientations. Any one of the second heat dissipation aluminum sheets 72 is connected to the ends of multiple second heat pipes 2 on the corresponding side, so that the heat on the multiple second heat pipes 2 can also converge on the corresponding second heat dissipation aluminum sheet 72. On one surface of any second heat dissipation aluminum sheet 72 facing away from the corresponding second heat pipe 2, a plurality of densely distributed second heat dissipation fins 721 are provided, which are used to promote the heat dissipation of the second heat dissipation aluminum sheet 72 and also achieve a better heat dissipation effect.

[0038] Further, in this embodiment, the multi-heat pipe redundant heat dissipation module further includes a plurality of third heat dissipation aluminum sheets 73 and a plurality of fourth heat dissipation aluminum sheets 74 arranged in different orientations. Any one of the third heat dissipation aluminum sheets 73 is connected to the ends of multiple third heat pipes 3 on the corresponding side, so that the heat on the multiple third heat pipes 3 can also converge on the corresponding third heat dissipation aluminum sheet 73. On one surface of any third heat dissipation aluminum sheet 73 facing away from the corresponding third heat pipe 3, a plurality of densely distributed third heat dissipation fins 731 are provided, which are used to promote the heat dissipation of the third heat dissipation aluminum sheet 73 and also achieve a better heat dissipation effect. Any one of the fourth heat dissipation aluminum sheets 74 is connected to the ends of multiple fourth heat pipes 4 on the corresponding side, so that the heat on the multiple fourth heat pipes 4 can also converge on the corresponding fourth heat dissipation aluminum sheet 74. On one surface of any fourth heat dissipation aluminum sheet 74 facing away from the corresponding fourth heat pipe 4, a plurality of densely distributed fourth heat dissipation fins 741 are provided, which are used to promote the heat dissipation of the fourth heat dissipation aluminum sheet 74 and also achieve a better heat dissipation effect.

[0039] Among them, the distance between any two adjacent first heat dissipation fins 711, second heat dissipation fins 721, third heat dissipation fins 731, and fourth heat dissipation fins 741 is not less than 6 mm to ensure smooth natural convection.

[0040] Specifically, in this embodiment, a plurality of heat dissipation fans 8 arranged in different orientations are further provided inside the charger body 10, and any one of the heat dissipation fans 8 corresponds to the first heat dissipation fins 711, second heat dissipation fins 721, third heat dissipation fins 731, or fourth heat dissipation fins 741 on the corresponding side; a plurality of air inlets and outlets for the corresponding plurality of heat dissipation fans 8 to intake and exhaust air are provided on the charger body 10, and the heat dissipation fans 8 are usually arranged at the air outlets to ensure the circulation and exchange of internal and external air.

[0041] It can be understood that Figure 1 only the layout diagrams of one first heat dissipation aluminum sheet 71, second heat dissipation aluminum sheet 72, third heat dissipation aluminum sheet 73, and fourth heat dissipation aluminum sheet 74 are shown in this embodiment. Correspondingly, Figure 3 only the layout diagrams of some of the heat dissipation fans 8 are also shown in the figure. In actual implementation, it should be subject to actual application, and the drawings do not constitute specific limitations.

[0042] Example 2: The embodiment of the present application provides a heat dissipation method for a high-power lithium battery charger, which is applied to the high-power lithium battery charger provided in the first embodiment to achieve intelligent temperature monitoring and heat dissipation control, and effectively control the realization of the heat dissipation effect. Please refer to steps S1-S3, as Figure 4 shown in the figure, this method specifically includes:

[0043] S1: Set the temperature grading control mode, which includes a low-load mode, a medium-load mode, and a high-load mode. Among them, the temperature in the low-load mode is less than 60 °C, the temperature in the medium-load mode is greater than or equal to 60 °C and less than 80 °C, and the temperature in the high-load mode is greater than or equal to 80 °C.

[0044] For example, in step S1, in the low-load mode, heat dissipation is mainly carried out through the first heat pipe 1, the second heat pipe 2, and the corresponding heat dissipation aluminum sheets and heat dissipation fins; in the medium-load mode, heat dissipation is mainly carried out through the first heat pipe 1, the second heat pipe 2, the third heat pipe 3, the fourth heat pipe 4, and the corresponding heat dissipation aluminum sheets and heat dissipation fins; in the high-load mode, heat dissipation is mainly carried out through the first heat pipe 1, the second heat pipe 2, the third heat pipe 3, the fourth heat pipe 4, the corresponding heat dissipation aluminum sheets and heat dissipation fins, and the corresponding heat dissipation fan 8.

[0045] S2: Detect and obtain the dynamic temperature change data inside the charger body 10 in real time through temperature sensing, and select the temperature grading control mode and its corresponding heat dissipation path according to the dynamic temperature change data.

[0046] A temperature sensing module is usually provided inside the charger body 10 to detect the real-time temperature. The temperature sensing module includes a contact temperature sensor and a non-contact temperature sensor. Contact temperature sensors such as thermistors, thermocouples, etc. Non-contact temperature sensors such as infrared thermal sensors, etc.

[0047] In step S2, the real-time dynamic temperature change is grasped through the real-time temperature data, so as to dynamically adjust the corresponding heat dissipation mode, which helps to select different heat dissipation paths. It can not only give full play to the potential of the redundant heat dissipation layout, but also meet the efficient, reliable, and intelligent heat dissipation requirements.

[0048] S3: Detect the working state of each first heat pipe 1 or second heat pipe 2 in real time and judge whether there is a working failure. If so, start the redundant heat dissipation path.

[0049] In step S3, not only can the normal heat dissipation be ensured by other normal first heat pipes 1 and / or second heat pipes 2 when some first heat pipes 1 fail; or the normal heat dissipation can be ensured by other normal second heat pipes 2 and / or first heat pipes 1 when some second heat pipes 2 fail, but also the normal heat dissipation can be further ensured by the corresponding third heat pipe 3, fourth heat pipe 4, heat dissipation aluminum sheet and the heat dissipation fins thereon, and each heat dissipation fan 8. This helps the system to dynamically adjust the heat dissipation path, effectively avoiding the risk of overall heat dissipation failure, and is flexible in application.

[0050] Further, in this embodiment, please refer to steps S4 and S5, as Figure 5 shown in, the method specifically further includes:

[0051] S4: Set the over-temperature protection mode, and the temperature threshold of the over-temperature protection mode is 95°C; if it is detected that the real-time temperature inside the charger body 10 reaches 95°C, the charging power shall be forced to be derated or the output shall be cut off;

[0052] S5: Prompt the failure of the first heat pipe 1 or the second heat pipe 2 through audible and visual alarms, and activate the redundant heat dissipation path.

[0053] By setting an audible and visual alarm module on the charger body 10, the heat dissipation situation can be timely grasped, so as to implement safety protection measures to ensure charging safety.

[0054] It should be understood that those of ordinary skill in the art can make improvements or transformations according to the above description, and all such improvements and transformations shall fall within the protection scope of the appended claims of this application.

Claims

1. A high-power lithium battery charger, comprising a charger body, characterized in that, A multi - heat - pipe redundant heat dissipation module is provided inside the charger body. The multi - heat - pipe redundant heat dissipation module includes multiple first heat pipes, multiple second heat pipes, multiple third heat pipes, and multiple fourth heat pipes. The multiple first heat pipes cover the heat - generating area inside the charger body in a cross - network form, and each cross - node between the first heat pipes corresponds to each heat source in the heat - generating area. Any heat source in the heat - generating area is also connected to at least one second heat pipe. The multiple third heat pipes are vertically connected to multiple cross - nodes one by one, and the multiple fourth heat pipes are also connected in a cross - network form with the multiple third heat pipes. The multi - heat - pipe redundant heat dissipation module further includes multiple first heat - dissipating aluminum sheets arranged in different orientations. Any one of the first heat - dissipating aluminum sheets is connected to the ends of the multiple first heat pipes on the corresponding side. On one surface of any first heat - dissipating aluminum sheet facing away from the corresponding first heat pipe, there are multiple densely distributed first heat - dissipating fins. The intervals between adjacent ends of any two first heat pipes on the same side are the same. The multi - heat - pipe redundant heat dissipation module further includes multiple second heat - dissipating aluminum sheets arranged in different orientations. Any one of the second heat - dissipating aluminum sheets is connected to the ends of the multiple second heat pipes on the corresponding side. On one surface of any second heat - dissipating aluminum sheet facing away from the corresponding second heat pipe, there are multiple densely distributed second heat - dissipating fins. The multi - heat - pipe redundant heat dissipation module further includes multiple third heat - dissipating aluminum sheets and multiple fourth heat - dissipating aluminum sheets arranged in different orientations. Any one of the third heat - dissipating aluminum sheets is connected to the ends of the multiple third heat pipes on the corresponding side. On one surface of any third heat - dissipating aluminum sheet facing away from the corresponding third heat pipe, there are multiple densely distributed third heat - dissipating fins. Any one of the fourth heat - dissipating aluminum sheets is connected to the ends of the multiple fourth heat pipes on the corresponding side. On one surface of any fourth heat - dissipating aluminum sheet facing away from the corresponding fourth heat pipe, there are multiple densely distributed fourth heat - dissipating fins. Multiple heat - dissipating fans arranged in different orientations are also provided inside the charger body. Any one of the heat - dissipating fans corresponds to the first heat - dissipating fins, second heat - dissipating fins, third heat - dissipating fins, or fourth heat - dissipating fins on the corresponding side. The charger body is provided with multiple air inlets and air outlets for the corresponding multiple heat - dissipating fans to intake and exhaust air. The heat dissipation method is as follows: Set a temperature - grading control mode, which includes a low - load mode, a medium - load mode, and a high - load mode. Among them, the temperature in the low - load mode is less than 60 °C, the temperature in the medium - load mode is greater than or equal to 60 °C and less than 80 °C, and the temperature in the high - load mode is greater than or equal to 80 °C. In the low - load mode, heat dissipation is carried out through the first heat pipes, second heat pipes, and the corresponding heat - dissipating aluminum sheets and heat - dissipating fins. In the medium - load mode, heat dissipation is mainly carried out through the first heat pipes, second heat pipes, third heat pipes, fourth heat pipes, and the corresponding heat - dissipating aluminum sheets and heat - dissipating fins. In the high - load mode, heat dissipation is mainly carried out through the first heat pipes, second heat pipes, third heat pipes, fourth heat pipes, the corresponding heat - dissipating aluminum sheets and heat - dissipating fins, and the corresponding heat - dissipating fans. Real-time detect and obtain the dynamic temperature change data inside the charger body through temperature sensing, and select the temperature grading control mode and its corresponding heat dissipation path according to the dynamic temperature change data; A temperature sensing module is usually provided inside the charger body to detect the real-time temperature, and the temperature sensing module includes a contact temperature sensor and a non-contact temperature sensor; Real-time detect the working state of each first heat pipe or second heat pipe and judge whether there is a working failure. If so, start the redundant heat dissipation path; When some first heat pipes fail, ensure normal heat dissipation through other normal first heat pipes and / or second heat pipes; When some second heat pipes fail, ensure normal heat dissipation through other normal second heat pipes and / or first heat pipes, and ensure normal heat dissipation through the corresponding third heat pipes, fourth heat pipes, heat dissipation aluminum sheets and the heat dissipation fins thereon and each heat dissipation fan.

2. The high-power lithium battery charger according to claim 1, wherein The multi-heat pipe redundant heat dissipation module further includes a copper block and a heat pipe heat spreader. The copper block and the heat pipe heat spreader are respectively connected to the heat source in the heat generation area through heat conductive materials; The cross node is connected to the heat pipe heat spreader, and the second heat pipe is connected to the copper block.

3. The high-power lithium battery charger according to claim 1 or 2, characterized in that, The cross angle between the two cross-arranged first heat pipes is 20-90°; The cross angle between the cross-arranged third heat pipe and the fourth heat pipe is 90°.

4. The high-power lithium battery charger according to claim 1, wherein The distance between any two adjacent first heat dissipation fins, second heat dissipation fins, third heat dissipation fins and fourth heat dissipation fins is not less than 6mm.

5. A heat dissipation method for a high-power lithium battery charger, applied to the high-power lithium battery charger described in any one of claims 1-4, characterized in that, The method includes: Set the temperature grading control mode, and the temperature grading control mode includes a low load mode, a medium load mode and a high load mode; Among them, the temperature in the low load mode is less than 60°C, the temperature in the medium load mode is greater than or equal to 60°C and less than 80°C, and the temperature in the high load mode is greater than or equal to 80°C; Real-time detect and obtain the dynamic temperature change data inside the charger body through temperature sensing, and select the temperature grading control mode and its corresponding heat dissipation path according to the dynamic temperature change data; Real-time detect the working state of each first heat pipe or second heat pipe and judge whether there is a working failure. If so, start the redundant heat dissipation path.

6. The heat dissipation method of the high-power lithium battery charger according to claim 5, characterized in that, The method further includes: Set the over-temperature protection mode, and the temperature threshold of the over-temperature protection mode is 95°C; If it is detected that the real-time temperature inside the charger body reaches 95°C, the charging power is forced to be derated or the output is cut off; Prompt the failure of the first heat pipe or the second heat pipe through sound and light alarm, and start the redundant heat dissipation path.

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